CN207855764U - A kind of Combined type external fixed support and pressure-adjustable fixing device of novel adjustable pressure - Google Patents

Abstract

This application involves a kind of Combined type external fixed support and pressure-adjustable fixing device of novel adjustable pressure, the pressure-adjustable fixing device includes：The fixed structure of adjusting rod, slide fit swivel nut, elastic device, fixed link and secured adjusted bar, the hold-down bars that the pressure-adjustable fixing device of the application is more original compares, it is almost redesigned in terms of main-body structure, from original simple pitman, it is changed to adjusting rod, sliding swivel nut, elastic device, unidirectional and bidirectional pressure regulating device, fixed link combination, this inching gear can reduce the stress shielding of exterior fixing rack, avoid osteoporosis.Secondly, bidirectional pressure regulating device is more accurate, can be needed to realize pressure regulation upward or downward according to specific patient profiles, to easily and effectively realize the advantages of pressure regulation；Finally, the fixed structure of fixed link and adjusting rod keeps the fixation of fixed link and adjusting rod more secured.

Description

Novel pressure-adjustable combined type external fixing support and pressure-adjustable fixing device

Technical Field

The utility model relates to a device for orthopedic clinical application, in particular to a pressure-adjustable fixing device and an elastic external fixing support comprising the same.

Background

When the long tubular bones of four limbs of a human body are fractured, the fracture is often required to be restored and fixed, corresponding fixing technologies and materials are continuously improved and updated, such as a steel plate, an intramedullary nail, an external fixing bracket and the like, and the currently common internal fixing instrument is a steel plate, which has the defects of large operation fixing range, more soft tissue stripping, large wound, poor restoration and the like; the defects of osteoporosis, fixture looseness, even rod breakage of internal fixtures and the like caused by stress shielding exist after operation, secondary operation or even multiple operations have to be performed after internal fixation fails, and the curative effect is seriously influenced.

The fracture healing process is complex, learners at home and abroad continuously perfect the fracture healing theory, the view of the strong fixation of fracture advocated in the early stage is proved by decades of clinical practice and experimental research, the stress shielding effect of a fixture easily causes osteoporosis of a fixed skeleton, the fixture is broken and the like, the proposed reasonable osteosynthesis view of organisms is gradually accepted, the fracture healing is influenced by a plurality of factors such as age, mechanical environment, local blood circulation, internal secretion and the like, the stress is one of main factors, various existing fixing instruments have different shapes and structures but cannot be subjected to micro-adjustment, the stress shielding and the osteoporosis are easily generated during application, and some fixing instruments can be micro-moved but cannot accurately limit the range, direction and magnitude of the micro-moved stress.

Stress and fracture healing aspects: the bone tissue is a viscoelastic solid material, has complex mechanical properties, and the structure and the function of the bone tissue are closely related to the mechanical characteristics and the mechanical environment state of the bone tissue, so that different stress stimuli are determined to have different influences on bone metabolism and bone healing. In terms of the mechanism of stress action: stress influences cell signal transduction pathways in the process of fracture healing, and calcium ion pathways expressed in cell membranes or existing across membranes can be usedTracts, integrins, growth factors, etc., transmit extracellular matrix signals into cells. Mechanical signal coupling, cell proliferation and intracellular and intercellular Ca of osteoblasts²⁺The level is related to the rise and fall of the integrin, which is a main substance linking signals inside and outside cells, can induce physiological and biochemical changes in osteoblasts under the stimulation of external tensile stress, make response and conduct signals, activate gene expression, synthesize and release cytokines and hormones, and regulate and control the induction of mechanical stimulation and the induction, proliferation, differentiation and mineralization of the mechanical stimulation. Integrin expression levels are characterized by time-limited changes. The secretion of growth factors caused by stress to osteoblast metabolism and cytokine regulation stress can be achieved by directly promoting the growth of cells or by promoting the secretion of hormones having growth effects in vivo, and the transforming growth factors are growth factors with high content in osteoblasts and can regulate the proliferation and differentiation of osteoblasts, and on the other hand, promote the synthesis of collagen type I, fibronectin, osteocontin and proteoglycan by osteoblasts.

The current research on the mode, the time, the type, the size and the like of the stress action is considered as follows: the activity of osteoblasts can be more excited by intermittent stress stimulation than by continuous stress stimulation; research considers that the early bone healing period is the most effective period for promoting bone healing by mechanical factors, when fracture healing recovers an original structure and hardness, the mechanical factors are the only factors for bone remodeling, proper stress and strain between fracture broken ends are ensured in the early bone healing period, compressive stress generated by axial load can drive osteoblasts and fibroblasts to develop towards the direction of differentiating into bones, the bone healing is facilitated, shear stress and torsional load generate shear stress, dynamic friction of fracture ends is preferably caused, capillary vessels and callus formed are greatly damaged, the fibroblast proliferation is driven, fibrous tissues are generated, the bone healing is not facilitated, and various stresses in the middle and later bone healing periods have certain promotion effects on the formation and reconstruction of the callus; the bone healing needs proper biomechanical environment or optimal stress level, the tissue can be well differentiated and healed only when the stress level of the fracture end and the tissue rigidity of the healing area are balanced and coordinated, the stress is too large and exceeds the tissue bearing capacity, living bones can be subjected to reactive surface absorption at a bone-bone interface or a bone-internal fixture interface, the pressure of the fracture end is reduced, so that the bone atrophy is caused, the pressure of the fracture end is reduced more rapidly when the pressure is larger, on the contrary, the elastic deformation is not enough to be caused, the mechanical induction of tissue differentiation is reduced, the generation is difficult, and the delayed healing and the bone nonunion can be caused. Generally, it is preferable that the fracture end compressive stress does not exceed the physiological body weight.

Micromotion and fracture healing: the micromotion of the fracture end is closely related to stress, and according to Wollf's law and many recent researches, the suitable micromotion of the controllability of the fracture end can promote the formation and calcification of callus and accelerate the healing of fracture, and the research at present on the aspects of the frequency, the time, the amount and the like of the micromotion is considered as follows: the low-frequency micromotion in the axial direction is beneficial to fracture healing, the early-stage controlled micromotion can promote fracture healing, and the micromotion generated in the late stage (4-6 weeks) is easy to damage the vascular network of the fracture part, so that the fracture healing is delayed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to remedy the defect that the external fixation support of current use treatment four limbs fracture exists, provide one kind have adjustable pressure, fixed firm, easy operation, adjust easy combination formula external fixation support and can press fixing device, prevent effectively that stress from sheltering from, avoid osteoporosis for union of fracture.

The utility model adopts the following technical scheme:

a pressure adjustable fixation device for orthopedic clinical use, the pressure adjustable fixation device comprising: an adjusting rod, a sliding screw sleeve, an elastic device, a fixed rod and a fixed structure for fixing the adjusting rod, wherein,

the adjusting rod is a cylindrical rod with a hollow structure, the fixed rod is a cylindrical rod, the sliding screw sleeve is a cylindrical sleeve, the upper part of the sliding screw sleeve is provided with a cylindrical barrel wall thickening part, the inner diameter of the sliding screw sleeve is matched with the outer diameters of the adjusting rod and the fixed rod, the upper part of the sliding screw sleeve is sleeved with the lower part of the adjusting rod, and the lower part of the sliding screw sleeve is sleeved with the upper part of the fixed rod; wherein,

the adjusting rod can be slightly adjusted in the axial direction relative to the sliding screw sleeve, but cannot rotate relatively;

the fixed rod is fixed relative to the sliding screw sleeve;

the elastic device provides elastic force in the process of adjusting the adjusting rod axially up and down by micro motion;

the fixing structure of the adjusting rod is used for fixing the adjusting rod and limiting the axial sliding of the adjusting rod;

the ends of the adjusting rod and the fixing rod can be designed into other structural types to be connected with a circular ring or other needle fixing structures.

Further, the specific connection mode of the adjusting rod and the sliding screw sleeve is one of the following modes:

(a) the lower part of the adjusting rod is provided with anti-rotation pin holes with two through sides, and the axial height of the anti-rotation pin holes is slightly larger than the transverse width; the upper part of the sliding fit screw sleeve is provided with anti-rotation holes which are communicated with the two radial sides, and the aperture of each anti-rotation hole is matched with the transverse width of each anti-rotation pin hole; the anti-rotation pin radially penetrates through an anti-rotation hole of the sliding screw sleeve and an anti-rotation pin hole at the lower part of the adjusting rod, and the diameter of the anti-rotation pin is matched with the aperture of the anti-rotation hole;

(b) the lower part of the adjusting rod is provided with anti-rotation pin holes with two through sides, and the axial length and the height of the anti-rotation pin holes are slightly larger than the transverse width; the upper part of the sliding fit screw sleeve is provided with anti-rotation holes which are communicated with the two radial sides, and the diameter of each anti-rotation hole is matched with the transverse width of each anti-rotation pin hole; the key structure comprises two cylindrical key pins with the same size, wherein one cylindrical key pin is inserted into one side of a rotation preventing hole and one side of a rotation preventing pin hole, the other cylindrical key pin is inserted into the other side of the rotation preventing hole and the other side of the rotation preventing pin hole, and the diameter of each cylindrical key pin is matched with the aperture of the rotation preventing hole;

(c) the lower part of the adjusting rod is provided with anti-rotation pin holes with two through sides, and the axial length and the height of the anti-rotation pin holes are slightly larger than the transverse width; the upper part of the sliding fit screw sleeve is provided with anti-rotation holes which are communicated with the two radial sides, and the diameter of each anti-rotation hole is matched with the transverse width of each anti-rotation pin hole; a cylindrical key pin is inserted into the anti-rotation hole and one side of the anti-rotation pin hole, and the diameter of the cylindrical key pin is matched with the aperture of the anti-rotation hole;

(d) the inner wall of the upper part of the sliding screw sleeve and the outer wall of the lower part of the adjusting rod are provided with key grooves corresponding to the guide flat keys, the key grooves of the guide flat keys arranged on the outer wall of the lower part of the adjusting rod are slightly longer than the guide flat keys, and the guide flat keys are fixedly connected with the sliding screw sleeve through fixed key pins;

(e) the lower end of the adjusting rod is provided with a cylindrical outer diameter increasing part, the outer diameter of the increasing part is provided with an anti-rotation plane, the inner cylinder opening of the sliding screw sleeve is smaller than the inner diameter of the cylinder, the upper cylinder opening is connected with the adjusting rod in a sliding manner, and the inner wall of the upper part of the sliding screw sleeve is provided with a convex plane which is in sliding fit with the plane arranged at the lower end of the adjusting rod;

(f) the inner wall of the upper part of the sliding fit screw sleeve is provided with a raised plane, the lower end of the adjusting rod is provided with an anti-falling sleeve which is cylindrical, the anti-falling sleeve is tightly connected with the adjusting rod by a fastening pin, and the outer wall of the anti-falling sleeve is provided with a plane which is matched with the plane arranged on the inner wall of the upper part of the sliding fit screw sleeve;

(g) the upper barrel opening of the sliding fit screw sleeve is set to be smaller than the inner diameter of the barrel, the upper barrel opening is connected with the adjusting rod in a sliding mode, a protruding plane is arranged on the inner wall of the upper portion of the sliding fit screw sleeve, the lower end of the adjusting rod is provided with the anti-falling sleeve which is cylindrical, the anti-falling sleeve is connected with the adjusting rod in a fastening mode through the fastening jackscrew, the outer wall of the anti-falling sleeve is provided with a plane, and the plane is matched with the inner wall of.

Furthermore, the sliding fit screw sleeve is divided, the upper part of the sliding fit screw sleeve is in sliding connection with the lower part of the adjusting rod, the lower part of the sliding fit screw sleeve is in fastening connection with the upper part of the fixing rod, and the lower end of the upper part of the sliding fit screw sleeve is in fastening connection with the upper end of the lower part through a connecting pin.

Furthermore, a fixing structure for fixing the adjusting rod is arranged to limit the adjusting rod to slide axially; the concrete structure is one of the following modes:

(a) the outer wall of the adjusting rod at the upper end of the sliding fit screw sleeve is provided with a fastening nut, the inner wall of the fastening nut is provided with threads and is in threaded connection with the adjusting rod, the fastening nut is adjusted downwards, the lower end of the fastening nut abuts against the upper end of the sliding fit screw sleeve, and the adjusting rod can be fixed;

(b) the upper part of the sliding fit screw sleeve is provided with a fastening jackscrew hole which is communicated with the radial single side and can screw the fastening jackscrew into the outer wall of the adjusting rod;

(c) a limiting sleeve is arranged on the outer wall of the adjusting rod at the upper end of the sliding screw sleeve, and the limiting sleeve is fixedly connected with the adjusting rod through a fastening jackscrew;

(d) a limiting clamping block is arranged on the outer wall of the adjusting rod at the upper end of the sliding screw sleeve, a round hole in sliding fit with the adjusting rod is axially arranged at one end of the limiting clamping block, a gap with the height of 2mm and communicated with the round hole and a fastening screw are arranged in the middle of the other end of the limiting clamping block, a threaded hole is formed in the limiting clamping block at the head end of the fastening screw, and the limiting clamping block can be fixed to the adjusting rod by screwing the fastening screw;

(e) the upper end of the sliding fit screw sleeve is provided with a limiting screw sleeve, the inner wall of the limiting screw sleeve is in threaded connection with the upper end of the sliding fit screw sleeve, and the upper end of the limiting screw sleeve is in sliding connection with the adjusting rod.

Further, the specific connection mode of the sliding fit thread sleeve and the fixed rod is one of the following modes:

(a) the upper part of the fixed rod is fixedly connected with the lower part of the sliding screw sleeve through a fastening jackscrew;

(b) the upper part of the fixed rod is fixedly connected with the lower part of the sliding screw sleeve by a fastening pin;

(c) the upper end of the fixed rod is in threaded connection with the lower part of the sliding screw sleeve, and the fixed rod is fastened by a fastening nut;

(d) the fixed rod and the sliding screw sleeve are integrated, and the upper part of the fixed rod is provided with a cylindrical diameter increasing part which is in a cylindrical structure;

(e) the outer wall of the lower part of the sliding fit screw sleeve is provided with a fixed screw sleeve which is fixedly connected with the sliding fit screw sleeve through a fixed pin, the fixed screw sleeve is radially provided with a fastening screw, the fastening screw is in threaded connection with the fixed screw sleeve and the lower part of the sliding fit screw sleeve, the head end of the fastening screw corresponds to a step arranged on the side surface of the upper end of the fixed rod, and the fixed rod is fixed; the fixed rod is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve and the lower portion of the fastening nut, two pin holes which are radially communicated are formed in the fixed rod at different axial heights, and after the two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up-and-down movement of the fastening nut;

(f) the outer wall of the lower part of the sliding fit screw sleeve is provided with a cylindrical wall thickened part, a fastening screw is radially arranged, the fastening screw is in threaded connection with the lower part of the sliding fit screw sleeve, the head end of the fastening screw corresponds to a step arranged on the side face of the upper end of the fixed rod, and the fixed rod is fixed; the fixed rod is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve and the lower portion of the fastening nut, two pin holes which are radially communicated are formed in the fixed rod at different axial heights, and after the two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up-and-down movement of the fastening nut;

(g) the outer wall of the lower part of the sliding fit screw sleeve is provided with a threaded gasket, a fixed rod screw and a fixed rod screw sliding hole, the inner wall of the threaded gasket is provided with threads, a circular hole is radially formed and is in threaded connection with the lower part of the sliding fit screw sleeve, the fixed rod screw radially traverses the threaded gasket circular hole, the head end of the fixed rod screw is in threaded connection with the upper part of the fixed rod, and the axial diameter of the fixed rod screw sliding hole is larger than the transverse diameter; the fixed rod is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve and the lower portion of the fastening nut, two pin holes which are radially communicated are formed in the fixed rod at different axial heights, and after the two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up-and-down movement of the fastening nut;

(h) the outer wall of the lower part of the sliding fit screw sleeve is provided with a threaded gasket, a fixed rod screw sliding hole and a positioning nut, the inner wall of the threaded gasket is provided with threads, a circular hole is radially formed and is in threaded connection with the lower part of the sliding fit screw sleeve, the fixed rod screw radially traverses the threaded gasket circular hole, the head end of the fixed rod screw is in threaded connection with the upper part of a fixed rod, the axial diameter of the fixed rod screw sliding hole is larger than the transverse diameter, and the positioning nut is in threaded connection with the lower part of the sliding fit screw sleeve and is arranged below the threaded gasket; the fixed rod is arranged to be in sliding fit with the lower part of the sliding fit screw sleeve, and the upper end of the fixed rod is radially provided with a screw hole matched with the fixed rod screw;

(i) the outer wall of the lower part of the sliding screw sleeve is provided with a connecting screw sleeve which is in threaded connection with the sliding screw sleeve and then is fastened and connected by a fixing pin, a fastening screw is radially arranged on the connecting screw sleeve, the head end of the fastening screw corresponds to a step arranged on the side surface of the upper end of the fixing rod, and the fixing rod is fixed; the fixed rod is arranged to be in sliding fit with the lower part of the sliding fit screw sleeve, the lower part of the connecting screw sleeve and the lower part of the fastening nut, two pin holes which are radially communicated are arranged on the fixed rod at different axial heights, and after two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up and down movement of the fastening nut;

(j) the outer wall of the lower portion of the sliding fit screw sleeve is provided with a position adjusting nut and a position adjusting nut, a fixed rod pin sliding hole with two communicated sides is radially arranged, the axial length of the fixed rod pin sliding hole is larger than the transverse width, the fixed rod is arranged in sliding fit with the lower portion of the sliding fit screw sleeve, a fixed rod pin is radially arranged at the upper end of the fixed rod pin, and 2 position adjusting nuts are respectively arranged above and below the fixed rod pin and in threaded connection with the lower portion of the sliding fit screw sleeve, and can drive the fixed rod pin and the fixed rod to move up and.

Further, establish one-way pressure regulating device on the sliding fit swivel nut barrel, the sliding fit swivel nut outer wall establishes the pressure scale table, one-way pressure regulating device's concrete structure is one of following mode:

(a) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with a pressure regulating pin hole with two through sides, and the axial length of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device is a compression spring, the upper end of the compression spring is abutted against the lower end of the adjusting rod, and the lower end of the compression spring is abutted against the pressure adjusting pin;

(b) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with a pressure regulating pin hole with two through sides, and the axial length height of the pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device is an elastic capsule and is also provided with an elastic capsule base, the upper end of the elastic capsule is abutted against the lower end surface of a tail cap of the adjusting rod arranged at the lower end of the adjusting rod, the lower end of the elastic capsule is abutted against the elastic capsule base, and the elastic capsule base is arranged on the pressure adjusting pin;

(c) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device consists of a compression spring, a pressure sensor and a pressure display, wherein the upper end of the compression spring is abutted against the lower end of the adjusting rod, the lower end of the compression spring is abutted against the upper end of the pressure sensor, the lower end of the pressure sensor is abutted against the pressure adjusting pin, and the pressure sensor is connected with the pressure display through the pressure adjusting pin hole;

(d) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device consists of an elastic capsule and a pressure display, and is also provided with an elastic capsule base, the upper end of the elastic capsule is abutted against the lower end surface of a tail cap of the adjusting rod arranged at the lower end of the adjusting rod, the lower end of the elastic capsule is abutted against the elastic capsule base, the elastic capsule base is arranged on a pressure regulating pin, and the elastic capsule is connected with the pressure display through a pressure regulating pin hole;

(e) the spring is positioned outside the cylinder wall of the sliding fit screw sleeve, a spring stopping pin and a pressure regulating pin are arranged below the adjusting rod, a long hole matched with the spring stopping pin and the pressure regulating pin is radially arranged on the sliding fit screw sleeve, a fixing sleeve and a limiting sleeve are respectively arranged at two ends of the spring stopping pin, a fixing sleeve and a limiting sleeve are respectively arranged at two ends of the pressure regulating pin, the upper part of the spring stopping pin is abutted against the lower end of the adjusting rod, threads are arranged outside the cylinder wall of the sliding fit screw sleeve, a pressure regulating nut is arranged outside the cylinder wall of the sliding fit screw sleeve, the upper end of the pressure regulating nut abuts against the lower end of the fixing sleeve sleeved on the spring stopping pin, and the lower end of the pressure regulating pin abuts against the upper end of the;

(f) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve and a limiting sleeve; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, the pressure regulating pin is in interference fit with the regulating rod, the fixed sleeve is in interference fit with the pressure regulating pin, a barrel opening on the limiting sleeve is smaller than the inner diameter of the lower part, the limiting sleeve is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve, and the fixed sleeve and the limiting sleeve are in sliding fit with the sliding screw sleeve; the spring is a compression spring sleeved below the adjusting rod, the lower end of the compression spring abuts against the pressure adjusting pin, the inner diameter of the upper cylinder wall of the sliding screw sleeve is small, the inner diameter of the lower cylinder wall of the sliding screw sleeve is large, and the upper end of the spring abuts against a step arranged on the inner wall of the sliding screw sleeve in a natural state;

(g) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve and a limiting sleeve; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, the pressure regulating pin is in interference fit with the regulating rod, an anti-rotation pin and the anti-rotation pin hole are arranged below the regulating rod, the spring is a compression spring sleeved below the regulating rod, the lower end of the compression spring abuts against the pressure regulating pin, the inner diameter of the upper cylinder wall of the sliding screw sleeve is small, the inner diameter of the lower cylinder wall of the sliding screw sleeve is large, and the upper end of the spring naturally abuts against a step arranged on the inner wall of the sliding screw sleeve;

(h) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve and a limiting sleeve, a pressure regulating pin hole with two through sides is radially arranged on the sliding screw sleeve, and the axial length height of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially runs through the pressure regulating pin hole of the sliding fit screw sleeve and the pressure regulating pin hole of the fixed sleeve, the pressure regulating pin is in interference fit with the adjusting rod, the anti-rotation pin and the anti-rotation pin hole are not arranged below the adjusting rod, the spring is a compression spring sleeved on the outer wall of the sliding fit screw sleeve, the lower end of the spring is abutted against the pressure regulating pin, the outer diameter of the upper cylinder wall of the sliding fit screw sleeve is large, the outer diameter of the lower cylinder wall of the sliding fit screw sleeve is small, and the upper end of the spring is abutted against a step arranged on the outer wall of the.

(i) The elastic device can be set as a tension spring, is positioned in the cylinder wall of the sliding fit screw sleeve and is in sliding connection with the sliding fit screw sleeve, the lower part of the adjusting rod is provided with a rotation-proof pin, the adjusting rod is in fastening fit with the rotation-proof pin, the lower end of the adjusting rod is axially provided with a long groove matched with the upper part of the tension spring, two ends of the rotation-proof pin are provided with a fixed sleeve and a limiting sleeve, the fixed sleeve and the limiting sleeve are in sliding connection with the sliding fit screw sleeve, a positioning nut is arranged below the rotation-proof pin and is in threaded connection with the sliding fit screw sleeve, the cylinder wall of the sliding fit screw sleeve is provided with a rotation-proof pin hole matched with the rotation-proof pin, the axial length is greater than the radial length, the upper rotation positioning nut can push the fixed sleeve, the limiting sleeve, the rotation-proof pin and the adjusting rod to move upwards integrally, the upper end and the lower end of the tension spring are provided with circular hooks, the upper end of the, a pressure regulating nut is arranged above the limiting sleeve, the lower part of the pressure regulating nut abuts against the fixed sleeve and the limiting sleeve, the pressure regulating nut is sleeved on the outer wall of the sliding screw sleeve and is in threaded connection with the sliding screw sleeve, a pressure regulating pin hole matched with the pressure regulating pin is formed in the wall of the sliding screw sleeve, the axial length is greater than the radial length, and the downward-rotating pressure regulating nut can drive the fixed sleeve, the limiting sleeve, the pressure regulating pin and the tension spring to move downwards;

(j) the spring is positioned in the wall of the sliding screw sleeve, the lower part of the adjusting rod axially penetrates through the spring, the lower part of the adjusting rod is provided with a pressure regulating pin and a pressure regulating pin, the lower part of the adjusting rod is radially provided with a long hole matched with the pressure regulating pin, the pressure regulating pin radially penetrates through the adjusting rod and is fixedly connected with the adjusting rod, two ends of the pressure regulating pin are respectively provided with a fixing sleeve and a limiting sleeve, the wall of the sliding screw sleeve is externally provided with a thread, the long hole matched with the pressure regulating pin and the pressure regulating pin is radially arranged, the inner diameter of the wall of the upper part of the sliding screw sleeve is larger than the inner diameter of the wall of the lower part, the upper part of the fixing rod is a cylindrical diameter-enlarged part and is in sliding;

(k) the spring is located outside the sliding fit thread sleeve wall, adjust the pole lower part and establish the pressure regulating pin, adjust the radial slot hole of establishing and adapting with the pressure regulating pin in pole lower part, the pressure regulating pin radially runs through the regulation pole, with adjust pole fastening connection, fixed cover is established respectively at pressure regulating pin both ends, the stop collar, sliding fit thread outside the thread of thread sleeve wall, radial setting and pressure regulating pin, the slot hole that the pressure regulating pin suited, sliding fit thread sleeve wall peripheral hardware pressure regulating nut, pressure regulating nut upper end is supported in fixed cover, the stop collar lower extreme, the pressure regulating nut lower extreme.

Further, establish two-way pressure regulating device on the sliding fit swivel nut barrel, the sliding fit swivel nut outer wall establishes the pressure scale table, two-way pressure regulating device's specific structure is one of following mode:

(a) the spring is positioned in the wall of the sliding screw sleeve, the lower part of the adjusting rod axially penetrates through the spring, the lower part of the adjusting rod is radially provided with a pressure regulating pin and a pressure regulating pin, the radial direction of the pressure regulating pin and the long hole matched with the pressure regulating pin are respectively provided with a long hole, the axial length of the pressure regulating pin is greater than the radial length of the pressure regulating pin, two ends of the pressure regulating pin are respectively provided with a fixed sleeve and a limiting sleeve, the wall of the sliding screw sleeve is externally provided with a thread, the radial direction of the long hole matched with the pressure regulating pin and the pressure regulating pin is provided with a long hole, the inner diameter of the wall of the lower part of the sliding screw sleeve is greater than the inner diameter of the wall of the upper part of the sliding screw sleeve; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(b) the spring is positioned outside the wall of the sliding screw sleeve, the lower part of the adjusting rod is radially provided with a pressure regulating pin and a pressure regulating pin, the radial direction of the adjusting rod is respectively provided with a long hole which is adaptive to the pressure regulating pin and the pressure regulating pin, the two ends of the pressure regulating pin are respectively provided with a fixed sleeve and a limiting sleeve, the outer part of the wall of the sliding screw sleeve is provided with a thread, the radial direction of the long hole is provided with a long hole which is adaptive to the pressure regulating pin and the pressure regulating pin, the outer part of the wall of the sliding screw sleeve is provided with; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(c) the elastic device is set into 2 springs, the adjusting rod is upwards and downwards provided with a pressure-regulating form, the springs are positioned in the cylinder wall of the sliding screw sleeve, the lower part of the adjusting rod axially penetrates through the springs, pressure-regulating pins and spring-blocking pins are radially arranged at the lower part of the adjusting rod, long holes matched with the pressure-regulating pins are radially arranged at the lower part of the adjusting rod, two ends of the pressure-regulating pins are respectively provided with a fixed sleeve and a limiting sleeve, the spring-blocking pins radially penetrate through the adjusting rod and are fixedly connected with the adjusting rod, the upper end of the spring is abutted against the pressure-regulating pins and the lower end of the spring-blocking pins in a natural state, the springs are positioned in the cylinder wall of the sliding screw sleeve, the pressure-regulating pins radially penetrate through the cylinder wall of the sliding screw sleeve, the two ends of the fixed sleeve and the limiting sleeve are respectively provided with the fixed sleeve and the limiting sleeve, the upper end of the spring is abutted against the spring-, the upper part of the fixed rod is a cylindrical part with a larger diameter and is in sliding fit with the inner wall of the lower part of the sliding screw sleeve, a pressure regulating nut and a pressure regulating nut are arranged outside the wall of the sliding screw sleeve, the upper end of the pressure regulating nut abuts against the lower ends of the fixed sleeve and the limiting sleeve, and the lower end of the pressure regulating nut abuts against the upper ends of the fixed sleeve and the limiting sleeve; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(d) the elastic device is set into 2 springs, the adjusting rod is upwards and downwards provided with a pressure-adjustable form, the springs and the springs are positioned outside the wall of the sliding screw sleeve, the adjusting rod axially penetrates through the springs and the springs, a screw bolt for preventing rotation and a spring stopping pin are radially arranged at the lower part of the adjusting rod, a long hole matched with the screw bolt for preventing rotation is radially arranged on the adjusting rod, the axial length is greater than the radial length, the screw bolt for preventing rotation is tightly connected with the sliding screw sleeve, the spring stopping pin radially penetrates through the adjusting rod and is tightly connected with the adjusting rod, the sliding screw sleeve is radially provided with a long hole matched with the spring stopping pin, the axial length is greater than the radial length, a pressure-adjusting nut and a pressure-adjusting nut are arranged outside the wall of the sliding screw sleeve and are in threaded connection with the sliding screw sleeve, the upper end of the spring abuts against the pressure-adjusting nut and the lower end abuts against the spring stopping pin, the upper end, the adjusting rod is provided with an upward acting force, the pressure regulating nut is screwed downwards, the spring blocking pin can be driven to move downwards, and the adjusting rod is provided with a downward acting force; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(e) the elastic device is set into 2 springs, the adjusting rod can be adjusted in pressure by upwards and downwards giving, the springs are positioned above the sliding screw sleeve, the adjusting rod axially penetrates through the springs, the springs are positioned outside the cylinder wall of the sliding screw sleeve, the sliding screw sleeve axially penetrates through the springs, the upper end of the sliding screw sleeve is provided with a pressure adjusting screw sleeve, the upper end of the sliding screw sleeve is slidably connected with the adjusting rod, the lower inner wall of the sliding screw sleeve is provided with threads and is in threaded connection with the sliding screw sleeve, the adjusting rod is provided with a fastening nut and is in threaded connection with the adjusting rod to limit the sliding of the adjusting rod, the adjusting rod is radially provided with a pressure adjusting pin, an anti-rotation pin and a stop spring pin, the adjusting rod is radially provided with a long hole matched with the anti-rotation pin, the axial length is larger than the radial length, the anti-rotation pin is tightly connected with the sliding screw sleeve, the pressure adjusting pin, a pressure regulating nut is arranged outside the wall of the sliding screw sleeve and is in threaded connection with the sliding screw sleeve, the upper end of the spring is abutted against the pressure regulating screw sleeve in a natural state, the lower end of the spring is abutted against the pressure regulating pin, the upper end of the spring is abutted against the spring blocking pin, and the lower end of the spring is abutted against the pressure regulating nut; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(f) the elastic device is provided with 2 springs, the adjusting rod is upwards and downwards provided with a mode of adjusting pressure, the springs and the springs are both positioned above the sliding screw sleeve, the adjusting rod axially penetrates through the springs and the springs, the pressure adjusting screw sleeve is arranged at the upper end of the sliding screw sleeve, the upper end of the adjusting rod is connected with the adjusting rod in a sliding mode, the inner wall of the lower portion of the adjusting rod is provided with threads and is in threaded connection with the sliding fit screw sleeve, the outer wall of the adjusting screw sleeve is provided with threads, the upper portion of the adjusting rod is provided with the adjusting screw sleeve, the adjusting rod is radially provided with a stop spring pin and an anti-rotation pin, the stop spring pin is in fastening connection with the adjusting rod, the adjusting rod is radially provided with a long hole matched with the anti-rotation pin, the anti-rotation pin is in fastening connection with the sliding fit screw sleeve, the upper end of the spring naturally abuts against the adjusting screw sleeve, the lower end of the spring abuts against the stop spring pin, the upper end of the spring abuts against the stop spring pin, the lower end of the spring;

(g) the elastic device can be set into 2 springs, the adjusting rod can be upwards and downwards provided with a pressure-adjustable form, the springs are positioned outside the wall of the sliding screw sleeve, the tension spring is positioned in the wall of the sliding screw sleeve, the lower end of the adjusting rod is axially provided with a long groove matched with the upper part of the tension spring, the lower part of the adjusting rod is radially provided with a screw bolt for preventing rotation and a pressure-adjustable pin, the adjusting rod is fixedly connected with the screw bolt for preventing rotation and the pressure-adjustable pin, the pressure-adjustable pin is radially arranged on the wall of the sliding screw sleeve, a long hole matched with the screw bolt for preventing rotation, the pressure-adjustable pin and the pressure-adjustable pin is radially arranged, the axial length is greater than the radial length, the two ends of the pressure-adjustable pin are provided with a fixed sleeve and a limiting sleeve, the upper end of the, The pressure regulating nut is arranged above the limiting sleeve and below the pressure regulating pin and is in threaded connection with the sliding threaded sleeve, the fixed sleeve and the limiting sleeve are abutted to the lower portion of the pressure regulating nut, the pressure regulating nut is sleeved on the outer wall of the sliding threaded sleeve, and the pressure dial gauge is arranged on the outer wall of the sliding threaded sleeve.

A pressure-adjustable combined external fixing support for orthopedic clinical application adopts 1 pressure-adjustable fixing device, and is combined with a rod needle clamping block or a rod needle clamping block, a rod clamping block and a fixing rod into a single-arm pressure-adjustable combined external fixing support.

A pressure-adjustable combined external fixing support for orthopedic clinical application adopts 2 pressure-adjustable fixing devices, and is combined with 2 semi-rings, bar clamping blocks, bar needle clamping blocks and fixing bars to form a semi-ring pressure-adjustable combined external fixing support.

The utility model provides an adjustable pressure's combination formula external fixator who orthopedics clinical application adopts 3, 4 above-mentioned adjustable pressure fixing device, and 4 or 5 rings or 2/3 ring, screw thread stick, fixation nut, solid needle screw, screw thread stand, fastening bolt make up the adjustable pressure's of ring formula combination formula external fixator.

The utility model discloses at first, a modified can adjust pressure fixing device is provided. The beneficial effects of the utility model reside in following several aspects:

first, the utility model discloses a but pressure regulating fixing device compares than original fixed rod, redesign almost completely in the aspect of the major structure, from original simple connective bar, the change is the combination of adjusting pole, slip swivel nut, resilient means, one-way and two-way pressure regulating device, dead lever, and the stress of the reducible external fixation support of this kind of micro-motion device shelters from, avoids osteoporosis.

Secondly, the bidirectional pressure regulating device is more accurate, and can realize upward or downward pressure regulation according to the specific patient condition, thereby conveniently and effectively realizing the advantage of pressure regulation;

finally, the fixing structure of the fixing rod and the adjusting rod enables the fixing of the fixing rod and the adjusting rod to be firmer.

To sum up, use the utility model discloses a but pressure regulating fixing device fixes, and the skeleton is under axial pressure, through bone screw on the skeleton, adjust the lower extreme on pole and the dead lever, makes to adjust the pole and move down the pressurization, and compression elasticity capsule or spring because it can move down a little to adjust the pole, drives and controls fracture skeleton also conduction stress thereupon, receives fracture end stress effect, can amazing fracture end callus on a bone formation, avoids the fracture end to produce stress and shelters from. When the fracture bone is subjected to axial stress, the callus generation at the fracture end can be stimulated, the osteoporosis caused by stress shielding of the external fixing frame can be avoided, the fracture healing speed can be accelerated, and the strength of the healed bone can be increased.

Drawings

The drawings are described below

FIG. 1 is a schematic diagram of I-shaped structures of a pressure-adjustable fixing device, an adjusting rod, a sliding fit screw sleeve connecting structure, a limiting adjusting rod sliding fixing structure, a fixing rod and a sliding fit screw sleeve connecting structure

FIG. 2 is a schematic view of II-shaped structure of a connecting structure of an adjusting rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 3 is a schematic view of III-type structure of the connecting structure of an adjusting rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 4 is a schematic view of an IV-shaped structure of a connecting structure of an adjusting rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 5 is a schematic view of a V-shaped structure of a connecting structure of an adjusting rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 6 is a schematic view showing a VI-type structure of a connecting structure of an adjusting rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 7 is a VII-shaped schematic view of a connecting structure of an adjusting rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 8 is a schematic view of the upper and lower split type structure of the sliding fit screw of the pressure-adjustable fixing device

FIG. 9 is a II-shaped structure of a sliding fixing structure of a pressure-adjustable fixing device limiting adjusting rod

FIG. 10 is a III-type structure of a sliding fixing structure of a pressure-adjustable fixing device for limiting an adjusting rod

FIG. 11 is a view showing a pressure-adjustable fixing device with a sliding-limiting adjusting rod fixing structure of an IV-type structure

FIG. 12 is a V-shaped structure of a fixed arm sliding limiting rod with adjustable pressure

FIG. 13 is a schematic view of a II-shaped structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device

FIG. 14 is a schematic view of a III-type structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device

FIG. 15 is a schematic view of an IV-shaped structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device

FIG. 16 is a schematic view of a V-shaped structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device

FIG. 17 is a schematic view of VI-shaped structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device

FIG. 18 is a VII-shaped schematic view of a connection structure of a fixing rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 19 is a schematic view of a VIII-type structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device

FIG. 20 is a schematic view of a structure of a fixing rod and a sliding screw sleeve connection structure IX of a pressure-adjustable fixing device

FIG. 21 is a schematic view of an X-shaped structure of a connection structure of a fixing rod and a sliding screw sleeve of a pressure-adjustable fixing device

FIG. 22 is a schematic view of a pressure-regulating device II of a pressure-regulating fixing device

FIG. 23 is a schematic view of a III-type structure of a pressure-adjustable fixing device

FIG. 24 is a schematic view of an IV-type structure of a pressure-regulating device of a pressure-regulating fixing device

FIG. 25 is a schematic view of a V-shaped structure of a pressure-adjustable fixing device

FIG. 26 is a schematic view of a VI-type pressure-regulating device of a pressure-adjustable fixing device

FIG. 27 is a VII-type structural diagram of a pressure-regulating device of a pressure-adjustable fixing device

FIG. 28 is a schematic view of a pressure regulating device VIII of the pressure-adjustable fixing device

FIG. 29 is a schematic view of a pressure-regulating device IX of the pressure-regulating fixing device

FIG. 30 is a schematic view of an X-shaped structure of a pressure-adjustable fixing device

FIG. 31 is a schematic view of a pressure-regulating device XI type of a pressure-regulating fixing device

FIG. 32 is a schematic view of a pressure regulating device XII type of a pressure-adjustable fixing device

FIG. 33 is a schematic view of a pressure-regulating device XIII of the pressure-regulating fixing device

FIG. 34 is a schematic view of a pressure-regulating device XIV of the pressure-regulating fixing device

FIG. 35 is a schematic view of an XV-type structure of a pressure-adjustable fixing device

FIG. 36 is a schematic view of a pressure-regulating device XVI of the pressure-adjustable fixing device

FIG. 37 is a schematic view of a pressure-regulating device XVII of the pressure-adjustable fixing device

FIG. 38 is a schematic view of a pressure-regulating device XVIII of the pressure-adjustable fixing device

FIG. 39 is a schematic diagram of a pressure-regulating device XIX of the pressure-regulating fixing device

FIG. 40 is a schematic view of a single-arm type I-shaped structure of a combined external fixation support with adjustable pressure

FIG. 41 is a schematic view of a pressure adjustable combination type external fixation frame with a semi-ring type I structure

FIG. 42 is a schematic view of a ring-type I-shaped structure of a pressure adjustable combined external fixation frame

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings of the specification, and it is obvious that the described embodiments are only some embodiments, not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without inventive labor are within the scope of the present invention.

The combined external fixing frame capable of adjusting the pressure is divided into 3 combination forms of a single arm type, a semi-ring type and a ring type, wherein,

1 pressure regulating fixing arms are combined with the rod needle clamping block or the rod needle clamping block, the rod clamping block and the fixing rod into a single-arm type pressure regulating external fixing support;

2 pressure regulating fixed arms, 2 semi-rings, rod and bar clamping blocks and fixed bars are combined into a semi-ring type pressure-adjustable external fixed support

The ring type pressure-adjustable external fixing support is formed by combining 3 or 4 pressure-adjusting fixing arms, 4 or 5 circular rings or 2/3 circular rings, threaded rods, fixing nuts, pin fixing screws, threaded columns and fastening bolts.

The pressure adjustable fixing device generally comprises the following structures: the device comprises an adjusting rod (1), a sliding screw sleeve (2), an anti-rotation pin (3), a spring (4), a fastening jackscrew (5), a fixing rod (6), a fastening nut (7), an anti-rotation key pin (8), a guide flat key (9), a fixing key pin (10), an anti-falling sleeve (11), a fastening pin (12), a fastening jackscrew (13), a fastening pin (14),

The device comprises a sliding screw sleeve lower part (15), a fastening jackscrew (16), a limiting sleeve (17), a fastening jackscrew (18), a fastening screw (19), a limiting clamping block (20), a limiting pin (21), a limiting screw sleeve (22), a fastening pin (23), a fastening nut (24), a fixed screw sleeve (25), a fastening nut (26), a limiting sleeve (27), a fastening pin (28), a threaded gasket (29), a fixing rod screw (30), a positioning nut (31), a fastening pin (32), a connecting screw sleeve (33), a positioning nut (34), a fixing rod pin (35), a positioning nut (36), a limiting sleeve (37), a pressure regulating pin (38), a fixing sleeve (39), a pressure regulating nut (40), a tail cap (41), an elastic capsule (42), an elastic capsule base (43), a pressure sensor (44), a pressure display (45), a pressure display (46), The pressure regulating device comprises a spring (47), a limiting sleeve (48), a fixing sleeve (49), a spring blocking pin (50), a limiting sleeve (51), a fixing sleeve (52), a rotation preventing pin (53), a position regulating nut (54), a pressure regulating nut (55), a tension spring (56), a pressure regulating pin (57), a fixing sleeve (58), a limiting sleeve (59), a pressure regulating nut (60), a fixing sleeve (61), a pressure regulating pin (62), a limiting sleeve (63), a spring blocking pin (64), a spring (65), a spring (66), a pressure regulating screw sleeve (67), a pressure regulating pin (68) and a pressure regulating screw sleeve (69).

The adjusting rod (1) is a cylindrical hollow rod, the fixing rods (6) are cylindrical hollow rods or solid rods, anti-rotation pin holes are radially formed in the lower portion of the adjusting rod (1), the axial length of each anti-rotation pin hole is larger than the radial length of each anti-rotation pin hole, and a plane is formed in the upper portion of each fixing rod (6) and corresponds to the fastening jackscrew (5);

the inner diameters of the upper part and the lower part of the sliding fit screw sleeve (2) are the same, the upper part is provided with a cylindrical barrel wall thickening part, the inner wall of the upper part of the sliding fit screw sleeve (2) is in sliding fit with the outer wall of the lower part of the adjusting rod (1), the inner wall of the lower part of the sliding fit screw sleeve (2) is in sliding fit with the outer wall of the upper part of the fixing rod (6), and the elastic device is arranged between the adjusting rod (1) and the fixing rod (6); wherein,

the upper part of the sliding fit screw sleeve (2) is radially provided with an anti-rotation pin (3) which is matched with an anti-rotation pin hole arranged at the lower part of the adjusting rod (1) to prevent the adjusting rod (1) from rotating in the horizontal direction, the lower part of the sliding fit screw sleeve (2) is radially provided with a fastening jackscrew (5), and the fastening screw (5) is screwed into a plane arranged on the outer wall of the upper part of the fixing rod (6) to prevent the fixing rod (6) from rotating and moving up and down in the horizontal direction relative to the sliding fit screw sleeve (2);

as a further arrangement of the sliding connection device between the adjusting rod (1) and the sliding screw sleeve (2), the sliding connection between the adjusting rod (1) and the sliding screw sleeve (2) is arranged as follows: 2 cylindrical key pins (8) are radially arranged on the pipe wall of the sliding screw sleeve (2) and are in sliding fit with anti-rotation pin holes arranged at the lower part of the adjusting rod (1);

as a further arrangement of the sliding connection device between the adjusting rod (1) and the sliding screw sleeve (2), the sliding connection between the adjusting rod (1) and the sliding screw sleeve (2) is arranged as follows: 1 cylindrical key pin (8) is radially arranged on the pipe wall of the sliding screw sleeve (2) and is in sliding fit with an anti-rotation pin hole arranged at the lower part of the adjusting rod (1);

as a further arrangement of the sliding connection device between the adjusting rod (1) and the sliding screw sleeve (2), the sliding connection between the adjusting rod (1) and the sliding screw sleeve (2) is arranged as follows: the sliding and anti-rotation sliding guide device is provided with a guide flat key (9), key grooves corresponding to the guide flat key (9) are formed in the inner wall of the upper part of the sliding screw sleeve (2) and the outer wall of the lower part of the adjusting rod (1), the guide flat key groove formed in the outer wall of the lower part of the adjusting rod (1) is slightly longer than the guide flat key (9), and the guide flat key (9) is fixedly connected with the sliding screw sleeve (2) through a fixed key pin (10);

as a further arrangement of the sliding connection device between the adjusting rod (1) and the sliding screw sleeve (2), the sliding connection between the adjusting rod (1) and the sliding screw sleeve (2) is arranged as follows: the lower end of the adjusting rod (1) is provided with a cylindrical outer diameter increasing part, the outer diameter of the increasing part is provided with an anti-rotation plane, an upper cylinder opening of the sliding screw sleeve (2) is set to be smaller than the inner diameter of the cylinder, the upper cylinder opening is connected with the adjusting rod (1) in a sliding manner, and the inner wall of the upper part of the sliding screw sleeve (2) is provided with a convex plane which is matched with a plane arranged at the lower end of the adjusting rod (1) in a sliding manner;

as a further arrangement of the sliding connection device between the adjusting rod (1) and the sliding screw sleeve (2), the sliding connection between the adjusting rod (1) and the sliding screw sleeve (2) is arranged as follows: a raised plane is arranged on the inner wall of the upper part of the sliding screw sleeve (2), an anti-drop sleeve (11) is arranged at the lower end of the adjusting rod (1), the anti-drop sleeve (11) is tightly connected with the adjusting rod (1) through a fastening pin (12), and a plane is arranged on the outer wall of the anti-drop sleeve (11) and matched with the plane arranged on the inner wall of the upper part of the sliding screw sleeve (2);

as a further arrangement of the sliding connection device between the adjusting rod (1) and the sliding screw sleeve (2), the sliding connection between the adjusting rod (1) and the sliding screw sleeve (2) is arranged as follows: a raised plane is arranged on the inner wall of the upper part of the sliding screw sleeve (2), an anti-falling sleeve (11) is arranged at the lower end of the adjusting rod (1), the anti-falling sleeve (11) is tightly connected with the adjusting rod (1) through a fastening jackscrew (13), and a plane is arranged on the outer wall of the anti-falling sleeve (11) and matched with the plane arranged on the inner wall of the upper part of the sliding screw sleeve (2);

as the further arrangement of the sliding fit screw sleeve (2), the sliding fit screw sleeve (2) is divided, the upper part (2) of the sliding fit screw sleeve is in sliding connection with the lower part of the adjusting rod (1), the lower part (15) of the sliding fit screw sleeve is in fastening connection with the upper part of the fixing rod (6), and the lower end of the upper part (2) of the sliding fit screw sleeve is in fastening connection with the upper end of the lower part (15) of the sliding fit screw sleeve through a connecting pin (14).

The fixed knot of fixed regulation pole (1) constructs, and the restriction is adjusted pole (1) axial motion establishes fastening nut (7) on adjusting pole (1) outer wall of sliding fit swivel nut (2) upper end, and the screw thread is established to fastening nut (7) inner wall, with adjusting pole (1) threaded connection, adjusts fastening nut (7) downwards, and its lower extreme supports in sliding fit swivel nut (2) upper end, can be fixed adjusting pole (1).

As a further improvement of the fixing structure of the fixed adjusting rod (1), the fixing structure is set as follows: a fastening jackscrew (16) is arranged on the side wall of the upper part of the sliding screw sleeve (2), is in threaded connection with the side wall of the sliding screw sleeve (2), is screwed in and abuts against the outer wall of the adjusting rod (1), and limits the sliding of the adjusting rod (1);

as a further improvement of the fixing structure of the fixed adjusting rod (1), the fixing structure is set as follows: a limiting sleeve (17) is arranged on the outer wall of the adjusting rod (1) at the upper end of the sliding screw sleeve (2), and the limiting sleeve (17) is fixedly connected with the adjusting rod (1) through a fastening jackscrew (18);

as a further improvement of the fixing structure of the fixed adjusting rod (1), the fixing structure is set as follows: a limiting clamping block (20) is arranged on the outer wall of the adjusting rod (1) at the upper end of the sliding screw sleeve (2), a round hole in sliding fit with the adjusting rod (1) is axially arranged at one end of the limiting clamping block (20), a gap with the height of 2mm and communicated with the round hole and a fastening screw (19) are arranged in the middle of the other end of the limiting clamping block, a threaded hole is formed in the limiting clamping block at the head end of the fastening screw (19), and the limiting clamping block (20) can be fixed on the adjusting rod (1) by screwing the fastening screw (19);

as a further improvement of the fixing structure of the fixed adjusting rod (1), the fixing structure is set as follows: a limiting pin (21) is arranged on the adjusting rod (1) at the upper end of the sliding screw sleeve (2), the limiting pin (21) is fixedly connected with the adjusting rod (1), a limiting screw sleeve (22) is arranged at the upper end of the sliding screw sleeve (2), the inner wall of the limiting screw sleeve (22) is in threaded connection with the upper end of the sliding screw sleeve (2), and the upper port of the limiting screw sleeve (22) is in sliding connection with the adjusting rod (1);

the connecting structure between the sliding fit screw sleeve (2) and the fixed rod (6) can be characterized in that a fastening jackscrew (5) is arranged on the side wall of the lower part of the sliding fit screw sleeve (2), and the upper part of the fixed rod (6) is fixedly connected with the lower part of the sliding fit screw sleeve (2) through the fastening jackscrew (5);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the upper part of the fixed rod (6) is fixedly connected with the lower part of the sliding screw sleeve (2) through a fastening pin (23);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the outer wall of the upper end of the fixed rod (6) is provided with threads, and the fixed rod is in threaded connection with the sliding thread sleeve (2) so as to fasten the fixed rod (6) by a fastening nut (24);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the fixed rod (6) and the sliding screw sleeve (2) are integrated, and the upper part of the fixed rod (6) is provided with a cylindrical diameter increasing part which is in a cylindrical structure;

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: a fixed threaded sleeve (25) is arranged on the outer wall of the lower part of the sliding threaded sleeve (2) and is fixedly connected with the sliding threaded sleeve (2) through a fixed pin (28), a fastening jackscrew (5) is radially arranged on the side wall of the fixed threaded sleeve (25), the fastening jackscrew (5) is in threaded connection with the fixed threaded sleeve (25) and the lower part of the sliding threaded sleeve (2), the head end of the fastening jackscrew corresponds to a step arranged on the side surface of the upper end of a fixed rod (6), and the fixed rod (6) is fixed; the fixing rod (6) is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve (2) and the lower portion of the fastening nut (26), two pin holes which are through in the radial direction are formed in different axial heights of the fixing rod (6), two pipe clamping pins (27) are matched with steps on the upper portion and the lower portion of the fastening nut (26) and the lower end of the fastening nut (26) after penetrating through the pin holes of the fixing rod (6) in the radial direction, and the fixing rod (6) can be driven to move up and down along with the up and down movement of the fastening nut (26);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the outer wall of the lower part of the sliding screw sleeve (2) is provided with a cylindrical barrel wall thickening part, the side wall is radially provided with a fastening jackscrew (5), the fastening jackscrew (5) is in threaded connection with the lower part of the sliding screw sleeve (2), the head end of the fastening jackscrew corresponds to a step arranged on the side surface of the upper end of the fixed rod (6), and the fixed rod (6) is fixed; the fixing rod (6) is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve (2) and the lower portion of the fastening nut (26), two pin holes which are through in the radial direction are formed in different axial heights of the fixing rod (6), two pipe clamping pins (27) are matched with steps on the upper portion and the lower portion of the fastening nut (26) and the lower end of the fastening nut (26) after penetrating through the pin holes of the fixing rod (6) in the radial direction, and the fixing rod (6) can be driven to move up and down along with the up and down movement of the fastening nut (26);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the outer wall of the lower part of the sliding screw sleeve (2) is provided with a threaded gasket (29), a fixed rod screw (30) and a fixed rod screw sliding hole, the inner wall of the threaded gasket (029) is provided with threads, and is radially provided with a round hole and is in threaded connection with the lower part of the sliding screw sleeve (2), the fixed rod screw (30) radially crosses the round hole of the threaded gasket (29), the head end of the fixed rod screw (30) is in threaded connection with the upper part of the fixed rod (6), and the axial diameter of the fixed rod screw sliding hole is larger than the transverse diameter; the fixing rod (6) is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve (2) and the lower portion of the fastening nut (26), two pin holes which are through in the radial direction are formed in different axial heights of the fixing rod (6), two pipe clamping pins (27) are matched with steps on the upper portion and the lower portion of the fastening nut (26) and the lower end of the fastening nut (26) after penetrating through the pin holes of the fixing rod (6) in the radial direction, and the fixing rod (6) can be driven to move up and down along with the up and down movement of the fastening nut (26);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the outer wall of the lower part of the sliding screw sleeve (2) is provided with a threaded gasket (29), a fixed rod screw (30), a fixed rod screw sliding hole and a positioning nut (31), the inner wall of the threaded gasket (029) is provided with threads, a circular hole is radially formed, the threaded gasket is in threaded connection with the lower part of the sliding screw sleeve (2), the fixed rod screw (30) radially crosses the circular hole of the threaded gasket (29), the head end of the fixed rod screw (30) is in threaded connection with the upper part of the fixed rod (6), and the axial diameter of the fixed rod screw sliding hole is larger than the transverse diameter; the fixed rod (6) is arranged to be in sliding fit with the lower part of the sliding fit threaded sleeve (2), the upper end of the fixed rod is radially provided with a screw hole which is matched with the fixed rod screw (30), and the positioning nut (31) is in threaded connection with the lower part of the sliding fit threaded sleeve (2) and is arranged below the threaded gasket (29) and can drive the fixed rod (6) to move upwards;

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: the outer wall of the lower part of the sliding screw sleeve (2) is provided with a connecting screw sleeve (33), the connecting screw sleeve is in threaded connection with the sliding screw sleeve (2) and then is fastened and connected by a fixing pin (32), the connecting screw sleeve (33) is radially provided with a fastening jackscrew (5), the head end of the fastening jackscrew (5) corresponds to a step arranged on the side surface of the upper end of the fixing rod (6), and the fixing rod (6) is fixed; the fixing rod (6) is arranged to be in sliding fit with the lower portion of the sliding fit threaded sleeve (2), the lower portion of the connecting threaded sleeve (33) and the lower portion of the fastening nut (26), two pin holes which are radially communicated are formed in different axial heights of the fixing rod (6), two clamping pipe pins (27) are matched with the upper step portion and the lower step portion of the fastening nut (26) and the lower end of the fastening nut (26) after radially penetrating through the pin holes of the fixing rod (6), and the fixing rod (6) can be driven to move up and down along with the up-and-down movement of the fastening nut (26);

as a further improvement of a connecting structure between the sliding screw sleeve (2) and the fixed rod (6), the connecting mechanism between the fixed rod (6) and the sliding screw sleeve (2) is specifically set as follows: adjusting nut (34) is established to sliding fit swivel nut (2) lower part outer wall, adjusting nut (36), radially establish the solid pole pin sliding hole that both sides link up, solid pole pin sliding hole axial length is greater than horizontal width, dead lever (6) are established into with sliding fit swivel nut (2) lower part sliding fit, the upper end radially establishes solid pole pin (35), adjusting nut (34), adjusting nut (36) are located on solid pole pin (35), the below respectively, with sliding fit swivel nut (2) lower part threaded connection, can drive solid pole pin (35) and dead lever (6) and reciprocate.

Can establish pressure regulating device on sliding fit swivel nut (2) barrel, pressure regulating device's specific setting is: the spring (4) is positioned in the cylinder wall of the sliding screw sleeve (2), the upper end of the spring is abutted to the lower end of the adjusting rod (1), and the lower end of the spring is abutted to the upper end of the fixing rod (6);

furthermore, a one-way pressure regulating device is arranged on the sliding screw sleeve barrel;

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides, and the axial length of each pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the elastic device is a compression spring (4), the upper end of the compression spring (4) is abutted against the lower end of the adjusting rod (1), and the lower end of the compression spring is abutted against the pressure adjusting pin (38);

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides, and the axial length of each pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the elastic device is an elastic capsule (42) and is also provided with an elastic capsule base (43), the upper end of the elastic capsule (42) is abutted against the lower end face of an adjusting rod tail cap (41) arranged at the lower end of the adjusting rod (1), the lower end of the elastic capsule (42) is abutted against the elastic capsule base (43), and the elastic capsule base (43) is arranged on the pressure regulating pin (38);

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides, and the axial length of each pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the elastic device consists of a compression spring (4), a pressure sensor (44) and a pressure display (45), wherein the upper end of the compression spring (4) is abutted against the lower end of the adjusting rod (1), the lower end of the compression spring is abutted against the upper end of the pressure sensor (44), the lower end of the pressure sensor (44) is abutted against the pressure regulating pin (38), and the pressure sensor (44) is connected with the pressure display (45) through a pressure regulating pin hole;

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides, and the axial length of each pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the elastic device consists of an elastic capsule (42) and a pressure display (46), and is also provided with an elastic capsule base (43), the upper end of the elastic capsule (42) is abutted against the lower end surface of an adjusting rod tail cap (41) arranged at the lower end of the adjusting rod (1), the lower end of the elastic capsule (42) is abutted against the elastic capsule base (43), the elastic capsule base (43) is arranged on a pressure adjusting pin (38), and the elastic capsule (42) is connected with the pressure display (46) through a pressure adjusting pin hole;

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the sliding fit screw sleeve (2) is radially provided with a spring stopping pin (50), a pressure regulating pin (38) and a long hole matched with the spring stopping pin (50) and the pressure regulating pin (38), two ends of the spring stopping pin (50) are respectively provided with a fixed sleeve (49) and a limiting sleeve (48), two ends of the pressure regulating pin (38) are respectively provided with a fixed sleeve (39) and a limiting sleeve (37), the upper part of the spring stopping pin (50) is abutted against the lower end of the adjusting rod (1), the cylinder wall of the sliding fit screw sleeve (2) is externally provided with a thread, the cylinder wall of the sliding fit screw sleeve is externally provided with a pressure regulating nut (40), the upper end of the pressure regulating nut (40) is abutted against the fixed sleeve (39) and the lower end of the limiting sleeve (37), the spring is a compression spring (47) sleeved outside the cylinder wall of the sliding fit screw sleeve (2), the upper end is abutted against the;

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39) and a limiting sleeve (37), a pressure regulating pin hole with two through sides is radially arranged on the sliding screw sleeve (2), and the axial length of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the pressure regulating pin (38) is in interference fit with the regulating rod (1), and the fixed sleeve (39) and the limiting sleeve (37) are in sliding fit with the sliding fit threaded sleeve (2); the spring is set to be a compression spring (4) sleeved below the adjusting rod, the lower end of the spring is abutted against the pressure adjusting pin (38), the inner diameter of the upper cylinder wall of the sliding screw sleeve (2) is small, the inner diameter of the lower cylinder wall of the sliding screw sleeve is large, and the upper end of the spring (4) is abutted against a step arranged on the inner wall of the sliding screw sleeve (2) in a natural state;

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39) and a limiting sleeve (37), a pressure regulating pin hole with two through sides is radially arranged on the sliding screw sleeve (2), and the axial length of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the pressure regulating pin (38) is in interference fit with the regulating rod (1), and the fixed sleeve (39) and the limiting sleeve (37) are in sliding fit with the sliding fit threaded sleeve (2); an anti-rotation pin (3) and an anti-rotation pin hole are arranged below the adjusting rod (1), the spring is a compression spring (4) sleeved below the adjusting rod, the lower end of the compression spring is abutted against the pressure adjusting pin (38), the inner diameter of the upper cylinder wall of the sliding screw sleeve (2) is small, the inner diameter of the lower cylinder wall of the sliding screw sleeve is large, and the upper end of the spring (4) is abutted against a step arranged on the inner wall of the sliding screw sleeve (2) in a natural state;

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39) and a limiting sleeve (37), a pressure regulating pin hole with two through sides is radially arranged on the sliding screw sleeve (2), and the axial length of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the upper opening of the limiting sleeve (37) is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve (39) and is in interference fit with the fixed sleeve (39); the pressure regulating pin (38) is in interference fit with the regulating rod (1), and the fixed sleeve (39) and the limiting sleeve (37) are in sliding fit with the sliding fit threaded sleeve (2); the spring is a compression spring (47) arranged on the outer wall of the sliding fit screw sleeve, the lower end of the compression spring is abutted against the pressure regulating pin (38), the sliding fit screw sleeve (2) is arranged to be large in outer diameter of the upper cylinder wall and small in outer diameter of the lower cylinder wall, and the upper end of the spring (47) is abutted against a step arranged on the outer wall of the sliding fit screw sleeve (2) in a natural state.

As the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the elastic device can be a tension spring (56) and is positioned in the cylinder wall of the sliding fit screw sleeve (2), the lower part of the adjusting rod (1) is provided with a rotation-preventing pin (53), the adjusting rod (1) is tightly matched with the rotation-preventing pin (53), the lower end of the adjusting rod (1) is axially provided with a long groove matched with the upper part of the tension spring (56), two ends of the rotation-preventing pin (53) are provided with a fixed sleeve (52) and a limiting sleeve (51), the fixed sleeve (52) and the limiting sleeve (51) are in sliding connection with the sliding fit screw sleeve (2), a positioning nut (54) is arranged below the rotation-preventing pin (53), the positioning nut (54) is in threaded connection with the sliding fit screw sleeve (2), the cylinder wall of the sliding fit screw sleeve (2) is provided with a rotation-preventing pin hole matched with the rotation-preventing pin (53), the axial length is greater than the radial length, the upper end and the lower end of the tension spring (56) are provided with circular hooks, the, the two ends of the pressure regulating pin (57) are provided with a fixed sleeve (58) and a limiting sleeve (59), a pressure regulating nut (55) is arranged above the limiting sleeve (59), the lower part of the pressure regulating nut (55) is abutted against the fixed sleeve (58) and the limiting sleeve (59), the pressure regulating nut is sleeved on the outer wall of the sliding screw sleeve (2) and is in threaded connection with the sliding screw sleeve (2), the wall (2) of the sliding screw sleeve is provided with a pressure regulating pin hole matched with the pressure regulating pin (57), the axial length is greater than the radial length, and the downward rotation of the pressure regulating nut (55) can drive the fixed sleeve (58), the limiting sleeve (59), the pressure regulating pin (57) and the tension spring (56);

as the further improvement of the unidirectional pressure regulating device, the pressure regulating device is specifically arranged as follows: the spring (4) is positioned in the cylinder wall of the sliding fit screw sleeve (2), the lower part of the adjusting rod (1) axially penetrates through the spring (4), the lower part of the adjusting rod (1) is provided with a pressure regulating pin (62) and a pressure regulating pin (38), the lower part of the adjusting rod (1) is radially provided with a long hole matched with the pressure regulating pin (62), the pressure regulating pin (38) radially penetrates through the adjusting rod (1) and is fixedly connected with the adjusting rod (1), two ends of the pressure regulating pin (62) are respectively provided with a fixed sleeve (61) and a limiting sleeve (63), two ends of the pressure regulating pin (38) are respectively provided with a fixed sleeve (39) and a limiting sleeve (37), the cylinder wall of the sliding fit screw sleeve (2) is externally provided with threads, the radially provided with the long hole matched with the pressure regulating pin (62) and the pressure regulating pin (38), the inner diameter of the upper part of the cylinder wall of the sliding fit screw sleeve (, a pressure regulating nut (60) and a pressure regulating nut (40) are arranged outside the cylinder wall of the sliding screw sleeve (2), the upper end of the pressure regulating nut (40) is propped against the lower ends of the fixed sleeve (39) and the limiting sleeve (37), and the lower end of the pressure regulating nut (60) is propped against the upper ends of the fixed sleeve (61) and the limiting sleeve (63);

as a further improvement of the one-way pressure regulating device, the pressure regulating device is specifically arranged; the spring (47) is positioned outside the cylinder wall of the sliding screw sleeve (2), the lower part of the adjusting rod (1) is provided with a pressure regulating pin (62) and a pressure regulating pin (38), the lower part of the adjusting rod (1) is radially provided with a long hole matched with the pressure regulating pin (62), the pressure regulating pin (38) radially penetrates through the adjusting rod (1) and is tightly connected with the adjusting rod (1), two ends of the pressure regulating pin (62) are respectively provided with a fixed sleeve (61) and a limiting sleeve (63), two ends of the pressure regulating pin (38) are respectively provided with a fixed sleeve (39) and a limiting sleeve (37), threads are arranged outside the cylinder wall of the sliding screw sleeve (2), the pressure regulating pin (62) and the long hole matched with the pressure regulating pin (38) are radially arranged, a pressure regulating nut (60) and a pressure regulating nut (40) are arranged outside the cylinder wall of the sliding screw sleeve (2), the upper end of the pressure regulating nut (40) is, The upper end of the limiting sleeve (63);

furthermore, a bidirectional pressure regulating device which can regulate the pressure of the adjusting rod (1) upwards and downwards is arranged on the cylinder body of the sliding screw sleeve (2);

the method specifically comprises the following steps: the spring (4) is positioned in the cylinder wall of the sliding fit screw sleeve (2), the lower part of the adjusting rod (1) axially penetrates through the spring (4), the lower part of the adjusting rod (1) is provided with a pressure regulating pin (62) and a pressure regulating pin (38), the lower part of the adjusting rod (1) is radially provided with a long hole matched with the pressure regulating pin (62) and the pressure regulating pin (38), two ends of the pressure regulating pin (38) are respectively provided with a fixed sleeve (39) and a limiting sleeve (37), two ends of the pressure regulating pin (62) are respectively provided with a fixed sleeve (61) and a limiting sleeve (63), the cylinder wall of the sliding fit screw sleeve (2) is externally provided with a thread, the pressure regulating pin (62) is radially arranged and matched with the long hole of the pressure regulating pin (38), the cylinder wall of the sliding fit screw sleeve (2) is externally provided with a pressure regulating nut (60) and a pressure regulating nut (40), the upper end, The upper end of the limiting sleeve (63); the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

as the further improvement of the pressure regulating device and the elastic device for bidirectional pressure regulation, the pressure regulating device is specifically arranged as follows: the spring (47) is positioned outside the cylinder wall of the sliding fit screw sleeve (2), the lower part of the adjusting rod (1) is provided with a pressure regulating pin (62) and a pressure regulating pin (38), the lower part of the adjusting rod (1) is radially provided with a long hole matched with the pressure regulating pin (62) and the pressure regulating pin (38), two ends of the pressure regulating pin (38) are respectively provided with a fixed sleeve (39) and a limiting sleeve (37), two ends of the pressure regulating pin (62) are respectively provided with a fixed sleeve (61) and a limiting sleeve (63), the cylinder wall of the sliding fit screw sleeve (2) is externally provided with a thread, the radial direction is provided with a long hole matched with the pressure regulating pin (62) and the pressure regulating pin (38), the sliding fit screw sleeve (2) is externally provided with a pressure regulating nut (60) and a cylinder wall pressure regulating nut (40), the upper end of the pressure regulating nut (40) is abutted against the; the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

as the further improvement of the pressure regulating device and the elastic device for bidirectional pressure regulation, the pressure regulating device is specifically arranged as follows: the elastic device is set as 2 springs, the adjusting rod (1) can be adjusted in pressure upwards and downwards, the springs (4) are positioned in the cylinder wall of the sliding screw sleeve (2), the lower part of the adjusting rod (1) axially penetrates through the springs (4), the lower part of the adjusting rod (1) is radially provided with pressure adjusting pins (62) and spring blocking pins (64), long holes matched with the pressure adjusting pins (62) are radially arranged, two ends of each pressure adjusting pin (62) are respectively provided with a fixed sleeve (61) and a limiting sleeve (63), each spring blocking pin (64) radially penetrates through the adjusting rod (1) and is tightly connected with the adjusting rod (1), the upper end of each spring (4) is abutted against the corresponding pressure adjusting pin (62) and the lower end thereof is abutted against the corresponding spring blocking pin (64) in a natural state, the springs (65) are positioned in the cylinder wall of the sliding screw sleeve (2), the pressure adjusting pins (38) radially penetrate through the cylinder wall of the sliding, the upper end of a spring (65) abuts against a spring blocking pin (64) and the lower end abuts against a pressure regulating pin (38) in a natural state, threads are arranged outside the cylinder wall of the sliding fit screw sleeve (2), long holes matched with the pressure regulating pin (62), the pressure regulating pin (38) and the spring blocking pin (64) are radially arranged, the inner diameter of the upper cylinder wall of the sliding fit screw sleeve (2) is larger than the inner diameter of the lower cylinder wall, the upper part of a fixing rod (6) is a cylindrical diameter enlarged part and is in sliding fit with the inner wall of the lower part of the sliding fit screw sleeve (2), a pressure regulating nut (60) and a pressure regulating nut (40) are arranged outside the cylinder wall of the sliding fit screw sleeve (2), the upper end of the pressure regulating nut (40) abuts against the lower ends of a fixing sleeve (39) and a limiting sleeve (37; the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

as the further improvement of the pressure regulating device and the elastic device for bidirectional pressure regulation, the pressure regulating device is specifically arranged as follows: the elastic device is provided with 2 springs, the pressure of the adjusting rod (1) can be adjusted upwards and downwards, the springs (47) and the springs (66) are both positioned outside the cylinder wall of the sliding screw sleeve (2), the sliding screw sleeve (2) axially penetrates through the springs (47) and the springs (66), the lower part of the adjusting rod (1) is radially provided with anti-rotation pins (3) and stop spring pins (64), the adjusting rod (1) is radially provided with long holes matched with the anti-rotation pins (3), the axial length is greater than the transverse length, the anti-rotation pins (3) are tightly connected with the sliding screw sleeve (2), the stop spring pins (64) radially penetrate through the adjusting rod (1) and are tightly connected with the adjusting rod (1), the sliding screw sleeve (2) is radially provided with long holes matched with the stop spring pins (64), the axial length is greater than the radial length, the pressure adjusting nut (60) and the pressure adjusting nut (40) are arranged outside the cylinder wall of the sliding screw sleeve (2) and are in threaded connection with, in a natural state, the upper end of the spring (47) abuts against the pressure regulating nut (60), the lower end abuts against the spring stopping pin (64), the upper end of the spring (66) abuts against the spring stopping pin (64), the lower end abuts against the pressure regulating nut (40), the pressure regulating nut (40) is screwed up, the spring stopping pin can be driven to move upwards (66), an upward acting force is given to the adjusting rod (1), the pressure regulating nut (60) is screwed down, the spring stopping pin (64) can be driven to move downwards, and a downward acting force is given to the adjusting rod (1); the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

as the further improvement of the pressure regulating device and the elastic device for bidirectional pressure regulation, the pressure regulating device is specifically arranged as follows: the elastic device is provided with 2 springs, the adjusting rod (1) can be adjusted in pressure in an upward and downward mode, the spring (4) is positioned above the sliding screw sleeve (2), the adjusting rod (1) axially penetrates through the spring (4), the spring (66) is positioned outside the cylinder wall of the sliding screw sleeve (2), the sliding screw sleeve (2) axially penetrates through the spring (66), the upper end of the sliding screw sleeve (2) is provided with a pressure adjusting screw sleeve (67), the upper end of the sliding screw sleeve is slidably connected with the adjusting rod (1), the lower inner wall of the sliding screw sleeve is provided with threads and is in threaded connection with the sliding screw sleeve (2), the adjusting rod (1) is provided with a fastening nut (7) which is in threaded connection with the adjusting rod (1) to limit the sliding of the adjusting rod (1), the adjusting rod (1) is radially provided with a pressure adjusting pin (68), an anti-rotation pin (3) and a spring blocking pin (64) from top to bottom, the adjusting rod (1, the anti-rotation pin (3) is tightly connected with the sliding screw sleeve (2), the pressure regulating pin (68) and the spring blocking pin (64) are tightly connected with the adjusting rod (1), the sliding screw sleeve (2) is radially provided with a long hole matched with the spring blocking pin (64), the axial length is greater than the radial length, a pressure regulating nut (40) is arranged outside the wall of the sliding screw sleeve and is in threaded connection with the sliding screw sleeve (2), the upper end of the spring (4) abuts against the pressure regulating screw sleeve (67) in a natural state, the lower end abuts against the pressure regulating pin (68), the upper end of the spring (66) abuts against the spring blocking pin (64), and the lower end abuts against the pressure regulating nut (40); the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

as the further improvement of the pressure regulating device and the elastic device for bidirectional pressure regulation, the pressure regulating device is specifically arranged as follows: the elastic device is provided with 2 springs, the adjusting rod (1) can be adjusted in pressure upwards and downwards, the springs (4) and the springs (65) are both positioned above the sliding screw sleeve (2), the adjusting rod (1) axially penetrates through the springs (4) and the springs (65), the upper end of the sliding screw sleeve (2) is provided with a pressure adjusting screw sleeve (69), the upper end of the sliding screw sleeve is in sliding connection with the adjusting rod (1), the inner wall of the lower part of the sliding screw sleeve is provided with threads and is in threaded connection with the sliding screw sleeve (2), the outer wall of the pressure adjusting screw sleeve (69) is provided with threads, the upper part of the sliding screw sleeve is provided with a pressure adjusting screw sleeve (67), the pressure adjusting screw sleeve (67) is in threaded connection with the pressure adjusting screw sleeve (69), the adjusting rod (1) is radially provided with a stop spring pin (68) and an anti-rotation pin (3), the stop spring pin (68) is in fastening connection with the adjusting rod (1), the adjusting rod (1) is radially, in a natural state, the upper end of the spring (4) abuts against the pressure regulating screw sleeve (67), the lower end abuts against the spring blocking pin (68), the upper end of the spring (65) abuts against the spring blocking pin (68), the lower end abuts against the pressure regulating screw sleeve (69), and pressure graduations are arranged on the outer wall of the sliding fit screw sleeve (2) and the outer wall of the pressure regulating screw sleeve (69);

as the further improvement of the pressure regulating device and the elastic device for bidirectional pressure regulation, the pressure regulating device is specifically arranged as follows: the elastic device can be set as 2 springs, the adjusting rod (1) can be adjusted in pressure in an upward and downward mode, the spring (47) is located outside the cylinder wall of the sliding screw sleeve (2), the tension spring (56) is located inside the cylinder wall of the sliding screw sleeve (2), the lower end of the adjusting rod (1) is axially provided with a long groove matched with the upper portion of the tension spring (52), the lower portion of the adjusting rod (1) is radially provided with a rotation-preventing pin (3) and a pressure-adjusting pin (53), the adjusting rod (1) is fixedly connected with the rotation-preventing pin (3) and the pressure-adjusting pin (53), the pressure-adjusting pin (57) is radially arranged on the sliding screw sleeve (2), the cylinder wall of the sliding screw sleeve (2) is radially provided with a long hole matched with the rotation-preventing pin (3), the pressure-adjusting pin (53) and the pressure-adjusting pin (57), the axial length is larger than the radial length, two ends of the pressure-adjusting pin (53), Stop collar (59), circular couple is established to extension spring (56) upper and lower extreme, the upper end couple overlaps on pressure regulating pin (53), the lower extreme couple overlaps on pressure regulating pin (57), spring (47) upper end supports in preventing revolving pin (3) under the natural state, the lower extreme supports in fixed cover (52), stop collar (51) top, pressure regulating nut (54) are established to pressure regulating pin (53) below, pressure regulating nut (54) and sliding fit swivel nut (2) threaded connection, pressure regulating nut (55) below supports in fixed cover (58), stop collar (59), pressure regulating nut (55) overlap in sliding fit swivel nut (2) outer wall, the pressure graduator is established to sliding fit swivel nut (2) outer wall.

FIG. 1 shows a pressure-adjustable fixing device I-shaped structure, an adjusting rod, a sliding screw sleeve connecting structure I-shaped structure, a limiting adjusting rod sliding fixing structure I-shaped structure, a fixed rod and a sliding screw sleeve connecting structure I-shaped structure, wherein an anti-rotation pin (3) is radially arranged at the upper part of a sliding screw sleeve (2), a fastening nut (7) is arranged on the adjusting rod, a fastening jackscrew (5) is radially arranged at the lower part of the sliding screw sleeve (2), and an elastic device is a spring (4);

FIG. 2 is a pressure-adjustable fixing device adjusting rod and sliding fit screw sleeve connecting structure II type structure, wherein 2 cylindrical key pins (8) are radially arranged on the pipe wall of the sliding fit screw sleeve (2) and are in sliding fit with anti-rotation pin holes arranged at the lower part of the adjusting rod (1);

FIG. 3 is a III-type structure of a connecting structure of an adjusting rod and a sliding fit screw sleeve of the pressure-adjustable fixing device, wherein 1 cylindrical key pin (8) is radially arranged on the pipe wall of the sliding fit screw sleeve (2) and is in sliding fit with an anti-rotation pin hole arranged at the lower part of the adjusting rod (1);

FIG. 4 is a IV-shaped structure of a connecting structure of an adjusting rod and a sliding screw sleeve of the pressure-adjustable fixing device, which is specifically configured; a guide flat key (9) is arranged, and key grooves corresponding to the guide flat key (9) are arranged on the inner wall of the upper part of the sliding screw sleeve and the outer wall of the lower part of the adjusting rod;

FIG. 5 is a V-shaped structure of a pressure-adjustable fixing device adjusting rod and a sliding fit screw sleeve connecting structure, wherein a cylindrical outer diameter increasing part is arranged at the lower end of the adjusting rod (1), an anti-rotation plane is arranged on the outer diameter of the increasing part, and a convex plane is arranged on the inner wall of the upper part of the sliding fit screw sleeve (2) and is in sliding fit with the plane arranged at the lower end of the adjusting rod (1);

FIG. 6 is a VI-shaped structure of a pressure-adjustable fixing device adjusting rod and a sliding fit screw sleeve connecting structure, wherein a raised plane is arranged on the inner wall of the upper part of a sliding fit screw sleeve (2), an anti-drop sleeve (11) is arranged at the lower end of the adjusting rod (1) to tightly connect the anti-drop sleeve (11) with the adjusting rod (1) through a fastening pin (12), and a plane is arranged on the outer wall of the anti-drop sleeve (11) and matched with the plane arranged on the inner wall of the upper part of the sliding fit screw sleeve (2);

FIG. 7 is a VII-shaped structure of a pressure-adjustable fixing device adjusting rod and sliding fit screw sleeve connecting structure, wherein a raised plane is arranged on the inner wall of the upper part of a sliding fit screw sleeve (2), an anti-drop sleeve (11) is arranged at the lower end of an adjusting rod (1) and is cylindrical, the anti-drop sleeve (11) is tightly connected with the adjusting rod (1) through a fastening jackscrew (13), and the outer wall of the anti-drop sleeve (11) is provided with a plane;

fig. 8 shows upper and lower split structures of a sliding fit screw sleeve of the pressure-adjustable fixing device, wherein the sliding fit screw sleeve (2) is arranged as an upper part (2) of the sliding fit screw sleeve and a lower part (15) of the sliding fit screw sleeve and is fastened and connected by a fastening pin (14);

fig. 9 shows a pressure-adjustable fixing device for limiting the sliding of the adjusting rod to fix a type II structure, in which a fastening jackscrew (16) is disposed on the upper side wall of the sliding screw sleeve (2), is in threaded connection with the side wall of the sliding screw sleeve (2), and is screwed into the outer wall of the adjusting rod (1) to limit the sliding of the adjusting rod (1);

FIG. 10 shows a III-type structure of a pressure-adjustable fixing device for limiting sliding and fixing a regulating rod, wherein a limiting sleeve (17) is arranged on the outer wall of the regulating rod (1) at the upper end of a sliding screw sleeve (2), and the limiting sleeve (17) is tightly connected with the regulating rod (1) through a fastening jackscrew (18);

fig. 11 shows an IV-type structure of a pressure-adjustable fixing device for limiting a sliding fixing structure of an adjusting rod, wherein a limiting clamping block (20) is arranged on the outer wall of the adjusting rod (1) at the upper end of a sliding screw sleeve (2), a fastening screw (19) is arranged on the limiting clamping block (20), a threaded hole is arranged on the limiting clamping block at the head end of the fastening screw (19), and the limiting clamping block (20) can be fixed on the adjusting rod (1) by screwing the fastening screw (19);

fig. 12 shows a V-shaped structure of a pressure-adjustable fixed arm limiting adjusting rod sliding fixing structure, wherein a limiting pin (21) is arranged on an adjusting rod (1) at the upper end of a sliding screw sleeve (2), the limiting pin (21) is fixedly connected with the adjusting rod (1), a limiting screw sleeve (22) is arranged at the upper end of the sliding screw sleeve (2), and the inner wall of the limiting screw sleeve (22) is in threaded connection with the upper end of the sliding screw sleeve (2);

FIG. 13 is a II-type structure of a fixed rod and a sliding fit screw sleeve connecting structure of the pressure-adjustable fixing device, wherein the upper part of the fixed rod (6) is fixedly connected with the lower part of the sliding fit screw sleeve (2) through a fastening pin (23);

FIG. 14 shows a III-type structure of a fixing rod and a sliding screw sleeve connection structure of a pressure-adjustable fixing device, wherein a sliding screw sleeve (2) is in threaded connection with the upper part of a fixing rod (6), and a fastening nut (24) and a fixable fixing rod (6) are arranged on the upper part of the fixing rod (6)

FIG. 15 shows a fixing rod and a sliding fit thread insert connection structure IV-type structure of a pressure-adjustable fixing device, wherein the fixing rod (6) and the sliding fit thread insert (2) are integrated, and the upper part of the fixing rod (6) is provided with a cylindrical diameter-increasing part which is in a cylindrical structure;

FIG. 16 shows a V-shaped structure of a fixed rod and a sliding fit screw sleeve connecting structure of a pressure-adjustable fixing device, wherein a fixed screw sleeve (25) is arranged on the outer wall of the lower part of a sliding fit screw sleeve (2) and is fixedly connected with the sliding fit screw sleeve (2) through a fixed pin (28), and a fastening jackscrew (5) and a fixed rod (6) are radially arranged on the side wall of the fixed screw sleeve (25); two pin holes which are through in the radial direction are arranged on the fixed rod (6) at different axial heights, and two pipe clamping pins (27) penetrate through the fixed rod (6) in the radial direction and are matched with the upper step and the lower step of the fastening nut (26) and the lower end of the fastening nut (26) respectively;

FIG. 17 shows a VI-shaped structure of a fixing rod and a sliding fit screw sleeve connecting structure of a pressure-adjustable fixing device, wherein the outer wall of the lower part of a sliding fit screw sleeve (2) is provided with a cylindrical cylinder wall thickening part, the side wall is radially provided with a fastening jackscrew (5), two pin holes which are radially communicated are arranged on the fixing rod (6) at different axial heights, and two pipe clamping pins (27) radially penetrate through the fixing rod (6) and are respectively matched with the upper step and the lower step of a fastening nut (26) and the lower end of the fastening nut (26);

FIG. 18 is a VII-type structure of a fixing rod and a sliding fit thread sleeve connecting structure of a pressure-adjustable fixing device, wherein the outer wall of the lower part of a sliding fit thread sleeve (2) is provided with a threaded gasket (29), a rod fixing screw (30) and a rod fixing screw sliding hole, the inner wall of the threaded gasket (029) is provided with threads and is in threaded connection with the lower part of the sliding fit thread sleeve (2), the head end of the rod fixing screw (30) is in threaded connection with the upper part of the fixing rod (6), the fixing rod (6) is arranged to be in sliding fit with the lower part of the sliding fit thread sleeve (2) and the lower part of a fastening nut (26), two pin holes which are radially communicated are arranged on the fixing rod (6) at different axial heights, and two clamping pipe pins (27) radially penetrate through the fixing rod (6) and are respectively matched with the;

FIG. 19 is a VIII type structure of a fixed rod and a sliding fit screw sleeve connection structure of a pressure-adjustable fixing device, wherein the outer wall of the lower part of a sliding fit screw sleeve (2) is provided with a threaded gasket (29), a fixed rod screw (30), a fixed rod screw sliding hole and a positioning nut (31), the inner wall of the threaded gasket (029) is provided with threads and is in threaded connection with the lower part of the sliding fit screw sleeve (2), and the head end of the fixed rod screw (30) is in threaded connection with the upper part of a fixed rod (6); the fixing rod (6) is arranged to be in sliding fit with the lower part of the sliding threaded sleeve (2), and the positioning nut (31) is in threaded connection with the lower part of the sliding threaded sleeve (2) and arranged below the threaded gasket (29);

fig. 20 shows a fixing rod and a sliding fit thread insert connecting structure IX type structure of the pressure-adjustable fixing device, wherein the outer wall of the lower part of the sliding fit thread insert (2) is provided with a connecting thread insert (33) which is in threaded connection with the sliding fit thread insert (2) and then is in fastening connection with a fixing pin (32), and the connecting thread insert (33) is radially provided with a fastening jackscrew (5); the fixing rod (6) is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve (2), the lower portion of the connecting screw sleeve (33) and the lower portion of the fastening nut (26), two pin holes which are radially communicated are formed in different axial heights of the fixing rod (6), and two pipe clamping pins (27) radially penetrate through the fixing rod (6) and are respectively matched with the upper step and the lower step of the fastening nut (26) and the lower end of the fastening nut (26);

fig. 21 is a pressure-adjustable fixing device fixing rod and sliding fit thread insert connecting structure X-shaped structure, a positioning nut (34) and a positioning nut (36) are arranged on the outer wall of the lower portion of a sliding fit thread insert (2), a fixing rod (6) is arranged to be in sliding fit with the lower portion of the sliding fit thread insert (2), a fixing rod pin (35) is radially arranged at the upper end of the fixing rod (6), and the positioning nut (34) and the positioning nut (36) are respectively located above and below the fixing rod pin (35) and are in threaded connection with the lower portion of the sliding fit thread insert (2);

the middle part of the sliding screw sleeve (2) can be provided with a one-way pressure regulating device which consists of a limiting sleeve (37), a pressure regulating pin (38), a fixed sleeve (39) and a pressure regulating nut (40)

FIG. 22 shows a pressure-regulating fixture pressure-regulating device II-type structure, the pressure-regulating device comprises a pressure-regulating pin (38), a fixed sleeve (39), a stop collar (37) and a pressure-regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is positioned outside the fixed sleeve (39); the elastic device is a compression spring (4), the upper end of the compression spring (4) is abutted against the lower end of the adjusting rod (1), and the lower end of the compression spring is abutted against the pressure adjusting pin (38);

FIG. 23 shows a III-type structure of a pressure-regulating device of a pressure-regulating fixing device, which comprises a pressure-regulating pin (38), a fixing sleeve (39), a stop sleeve (37) and a pressure-regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is positioned outside the fixed sleeve (39); the elastic device is an elastic capsule (42) and is also provided with an elastic capsule base (43), the upper end of the elastic capsule (42) is abutted against the lower end face of an adjusting rod tail cap (41) arranged at the lower end of the adjusting rod (1), the lower end of the elastic capsule (42) is abutted against the elastic capsule base (43), and the elastic capsule base (43) is arranged on the pressure regulating pin (38);

fig. 24 is an IV-type structure of a pressure-regulating fixing device, which includes a pressure-regulating pin (38), a fixing sleeve (39), a stop sleeve (37) and a pressure-regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is in interference fit with the fixed sleeve (39); the elastic device consists of a compression spring (4), a pressure sensor (44) and a pressure display (45), wherein the pressure sensor (44) is connected with the pressure display (45) through a pressure regulating pin hole;

FIG. 25 is a V-shaped structure of a pressure regulating device of a pressure-adjustable fixing device, which comprises a pressure regulating pin (38), a fixing sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is in interference fit with the fixed sleeve (39); the elastic device consists of an elastic capsule (42) and a pressure display (46), and is also provided with an elastic capsule base (43), the upper end of the elastic capsule (42) is abutted against the lower end surface of an adjusting rod tail cap (41) arranged at the lower end of the adjusting rod (1), and the elastic capsule (42) is connected with the pressure display (46) through a pressure adjusting pin hole;

fig. 26 is a VI-shaped structure of a pressure regulating device of a pressure-adjustable fixing device, a sliding screw sleeve (2) is radially provided with a spring blocking pin (50), a pressure regulating pin (38) and a long hole matched with the spring blocking pin (50) and the pressure regulating pin (38), two ends of the spring blocking pin (50) are respectively provided with a fixed sleeve (49) and a limiting sleeve (48), two ends of the pressure regulating pin (38) are respectively provided with a fixed sleeve (39) and a limiting sleeve (37), the upper part of the spring blocking pin (50) is abutted against the lower end of a regulating rod (1), a pressure regulating nut (40) is arranged outside the wall of the sliding screw sleeve, and a spring is a compression spring (47) sleeved outside the wall of the sliding screw;

fig. 27 is a VII-type structure of a pressure regulating device of a pressure-adjustable fixing device, the pressure regulating device comprises a pressure regulating pin (38), a fixing sleeve (39) and a limiting sleeve (37), a pressure regulating pin hole with two through sides is radially arranged on a sliding screw sleeve (2), and the axial length of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is in interference fit with the fixed sleeve (39); the pressure regulating pin (38) is in interference fit with the regulating rod (1), the spring is a compression spring (4) sleeved below the regulating rod, and the upper end of the spring (4) naturally abuts against a step arranged on the inner wall of the sliding threaded sleeve (2);

fig. 28 is a pressure regulating device VIII type structure of a pressure-adjustable fixing device, as a further improvement of the one-way pressure regulating device, the pressure regulating device is specifically configured as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39) and a limiting sleeve (37), and the sliding screw sleeve (2) is radially provided with pressure regulating pin holes with two through sides; the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is in interference fit with the fixed sleeve (39); the pressure regulating pin (38) is in interference fit with the regulating rod (1), an anti-rotation pin (3) and an anti-rotation pin hole are arranged below the regulating rod (1), the spring is a compression spring (4) sleeved below the regulating rod, and the upper end of the spring (4) naturally abuts against a step arranged on the inner wall of the sliding screw sleeve (2);

fig. 29 is a pressure regulating device IX type structure of a pressure-adjustable fixing device, the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39) and a limit sleeve (37), and a pressure regulating pin hole with two through sides is radially arranged on a sliding screw sleeve (2); the fixed sleeve (39) is sleeved on the outer wall of the sliding screw sleeve (2) in a sliding manner; the limiting sleeve (37) is in interference fit with the fixed sleeve (39); the pressure regulating pin (38) is in interference fit with the regulating rod (1), the spring is a compression spring (47) arranged on the outer wall of the sliding threaded sleeve, and the upper end of the spring (47) naturally abuts against a step arranged on the outer wall of the sliding threaded sleeve (2).

Fig. 30 is an X-shaped structure of a pressure regulating device of a pressure-adjustable fixing device, wherein an elastic device can be a tension spring (56) and is positioned in the cylinder wall of a sliding screw sleeve (2), a rotation-preventing pin (53) is arranged at the lower part of an adjusting rod (1), an elongated slot matched with the upper part of the tension spring (56) is axially arranged at the lower end of the adjusting rod (1), two ends of the rotation-preventing pin (53) are provided with a fixed sleeve (52), a positioning nut (54) is arranged below the rotation-preventing pin (53), circular hooks are arranged at the upper end and the lower end of the tension spring (56), an upper end hook is sleeved on the rotation-preventing pin (53), a lower end hook is sleeved on the pressure regulating pin (57), two ends of the pressure regulating pin (57) are provided with a fixed sleeve (58) and a limiting sleeve (59), and a;

fig. 31 is a XI-type structure of a pressure-adjustable fixing device pressure-adjusting device, wherein a spring (4) is positioned in a cylinder wall of a sliding screw sleeve (2), the lower part of an adjusting rod (1) axially penetrates through the spring (4), a pressure-adjusting pin (62) and a pressure-adjusting pin (38) are arranged at the lower part of the adjusting rod (1), a fixed sleeve (61) and a limiting sleeve (63) are respectively arranged at two ends of the pressure-adjusting pin (62), a fixed sleeve (39) and a limiting sleeve (37) are respectively arranged at two ends of the pressure-adjusting pin (38), the inner diameter of the cylinder wall at the upper part of the sliding screw sleeve (2) is larger than the inner diameter of the cylinder wall at the lower part, a cylindrical diameter-enlarged part is arranged at the upper part of a fixed rod (6) and;

fig. 32 shows a pressure-adjustable fixing device pressure-regulating device XII-shaped structure, wherein a spring (47) is located outside the cylinder wall of a sliding screw sleeve (2), a pressure-regulating pin (62) and a pressure-regulating pin (38) are arranged at the lower part of an adjusting rod (1), a long hole matched with the pressure-regulating pin (62) is radially arranged at the lower part of the adjusting rod (1), the pressure-regulating pin (38) radially penetrates through the adjusting rod (1) and is tightly connected with the adjusting rod (1), a fixed sleeve (61) and a limiting sleeve (63) are respectively arranged at two ends of the pressure-regulating pin (62), a fixed sleeve (39) and a limiting sleeve (37) are respectively arranged at two ends of the pressure-regulating pin (38), and a pressure-;

a bidirectional pressure regulating device which can regulate the pressure upwards and downwards for the regulating rod (1) is arranged on the cylinder body of the sliding screw sleeve (2);

fig. 33 is a pressure-adjustable fixing device pressure-regulating device XIII-shaped structure, wherein a spring (4) is located in the cylinder wall of a sliding screw sleeve (2), the lower part of an adjusting rod (1) axially penetrates through the spring (4), a pressure-regulating pin (62) and a pressure-regulating pin (38) are arranged at the lower part of the adjusting rod (1), a long hole matched with the pressure-regulating pin (62) and the pressure-regulating pin (38) is radially arranged at the lower part of the adjusting rod (1), a fixed sleeve (39) and a limiting sleeve (37) are respectively arranged at two ends of the pressure-regulating pin (38), a fixed sleeve (61) and a limiting sleeve (63) are respectively arranged at two ends of the pressure-regulating pin (62), a long hole matched with the pressure-regulating pin (62) and the pressure-regulating pin (38) is radially arranged in the sliding screw sleeve (2), a pressure-regulating nut (60);

fig. 34 is a XIV-type structure of a pressure-adjustable fixing device pressure-regulating device, a spring (47) is located outside the cylinder wall of a sliding screw sleeve (2), a pressure-regulating pin (62) and a pressure-regulating pin (38) are arranged at the lower part of an adjusting rod (1), long holes matched with the pressure-regulating pin (62) and the pressure-regulating pin (38) are radially arranged at the lower part of the adjusting rod (1), a fixing sleeve (39) and a limiting sleeve (37) are respectively arranged at two ends of the pressure-regulating pin (38), a fixing sleeve (61) and a limiting sleeve (63) are respectively arranged at two ends of the pressure-regulating pin (62), long holes matched with the pressure-regulating pin (62) and the pressure-regulating pin (38) are radially arranged in the sliding screw sleeve (2), a pressure-regulating nut (60) and a pressure-regulating nut (40;

fig. 35 is a pressure-adjustable fixing device pressure-adjusting device XV type structure, the elastic device is set to 2 springs, the spring (4) is located in the cylinder wall of the sliding fit screw sleeve (2), the lower part of the adjusting rod (1) axially penetrates through the spring (4), the lower part of the adjusting rod (1) radially sets a pressure-adjusting pin (62) and a spring-stopping pin (64), the two ends of the pressure-adjusting pin (62) are respectively provided with a fixed sleeve (61) and a limit sleeve (63), the spring-stopping pin (64) radially penetrates through the adjusting rod (1) and is tightly connected with the adjusting rod (1), the spring (65) is located in the cylinder wall of the sliding fit screw sleeve (2), the pressure-adjusting pin (38) radially penetrates through the cylinder wall of the sliding fit screw sleeve (2), the two ends are provided with a fixed sleeve (39) and a limit sleeve (37), the upper end of the spring (65) is abutted against the spring-stopping pin (64) in a natural state, The pressure regulating pin (38) and the spring stopping pin (64) are matched with each other, the upper part of the fixing rod (6) is a cylindrical part with a larger diameter and is in sliding fit with the inner wall of the lower part of the sliding fit screw sleeve (2), the pressure regulating nut (60) and the pressure regulating nut (40) are arranged outside the cylinder wall of the sliding fit screw sleeve (2), and the outer wall of the sliding fit screw sleeve (2) is provided with a pressure scale meter;

FIG. 36 shows a pressure-adjustable fixing device pressure-adjusting device XVI type structure, the elastic device is set as 2 springs, the spring (47) and the spring (66) are both located outside the cylinder wall of the sliding screw sleeve (2), the lower part of the adjusting rod (1) is radially provided with a rotation-preventing pin (3) and a spring-stopping pin (64), the adjusting rod (1) is radially provided with a long hole adapted to the rotation-preventing pin (3), the rotation-preventing pin (3) is tightly connected with the sliding screw sleeve (2), the spring-stopping pin (64) radially penetrates through the adjusting rod (1) and is tightly connected with the adjusting rod (1), the sliding screw sleeve (2) is radially provided with a long hole adapted to the spring-stopping pin (64), the cylinder wall of the sliding screw sleeve (2) is externally provided with a pressure-adjusting nut (60) and a pressure-adjusting nut (40), the upper end of the spring (47) naturally abuts against the pressure-adjusting nut (60), the lower end abuts against the spring-stopping pin (64, the lower end of the sliding screw sleeve is abutted against the pressure regulating nut (40), and the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

FIG. 37 shows a pressure-adjustable fixing device pressure-regulating device XVII type structure, the elastic device is set as 2 springs, the spring (4) is located above the sliding screw sleeve (2), the adjusting rod (1) axially penetrates through the spring (4), the spring (66) is located outside the cylinder wall of the sliding screw sleeve (2), the sliding screw sleeve (2) axially penetrates through the spring (66), the upper end of the sliding screw sleeve (2) is provided with a pressure-regulating screw sleeve (67), the upper end of the sliding screw sleeve is slidably connected with the adjusting rod (1), the lower inner wall of the sliding screw sleeve is provided with threads and is in threaded connection with the sliding screw sleeve (2), the adjusting rod (1) is provided with a fastening nut (7) and is in threaded connection with the adjusting rod (1), the adjusting rod (1) is radially provided with a pressure-regulating pin (68), an anti-rotation pin (3) and a stop spring pin (64), the adjusting rod (1) is radially provided with a long hole which is matched with the anti-rotation pin (, the pressure regulating pin (68) and the spring stopping pin (64) are fixedly connected with the regulating rod (1), the sliding screw sleeve (2) is radially provided with a long hole matched with the spring stopping pin (64), the wall of the sliding screw sleeve is externally provided with a pressure regulating nut (40) and is in threaded connection with the sliding screw sleeve (2), the upper end of the spring (4) is abutted against the pressure regulating screw sleeve (67) in a natural state, the lower end of the spring (66) is abutted against the pressure regulating pin (68), the upper end of the spring (66) is abutted against the spring stopping pin (64), and the lower end of the spring (66) is abutted against the pressure regulating nut; the outer wall of the sliding screw sleeve (2) is provided with a pressure dial gauge;

FIG. 38 shows a pressure-adjustable fixing device pressure-regulating device XVIII type structure, the elastic device is set as 2 springs, the spring (4) and the spring (65) are both located above the sliding screw sleeve (2), the adjusting rod (1) axially penetrates through the spring (4) and the spring (65), the upper end of the sliding screw sleeve (2) is provided with a pressure-regulating screw sleeve (69), the upper end thereof is slidably connected with the adjusting rod (1), the lower inner wall thereof is provided with threads and is in threaded connection with the sliding screw sleeve (2), the outer wall of the pressure-regulating screw sleeve (69) is provided with threads, the upper part thereof is provided with a pressure-regulating screw sleeve (67), the pressure-regulating screw sleeve (67) is in threaded connection with the pressure-regulating screw sleeve (69), the adjusting rod (1) is radially provided with a stop spring pin (68) and an anti-rotation pin (3), the stop pin (68) is in fastened connection with the adjusting rod (1), the adjusting rod (1) is radially provided with a long hole adapted with the anti, in a natural state, the upper end of the spring (4) abuts against the pressure regulating screw sleeve (67), the lower end abuts against the spring blocking pin (68), the upper end of the spring (65) abuts against the spring blocking pin (68), the lower end abuts against the pressure regulating screw sleeve (69), and pressure graduations are arranged on the outer wall of the sliding fit screw sleeve (2) and the outer wall of the pressure regulating screw sleeve (69);

FIG. 39 shows a pressure-adjustable fixing device pressure-regulating device XIX-type structure, the elastic device can be set as 2 springs, the spring (47) is located outside the cylinder wall of the sliding screw sleeve (2), the tension spring (56) is located inside the cylinder wall of the sliding screw sleeve (2), the lower end of the adjusting rod (1) is axially provided with a long groove adapted to the upper part of the tension spring (52), the lower part of the adjusting rod (1) is radially provided with a rotation-preventing pin (3) and a pressure-regulating pin (53), the adjusting rod (1) is tightly connected with the rotation-preventing pin (3) and the pressure-regulating pin (53), the pressure-regulating pin (57) is radially arranged on the sliding screw sleeve (2), the cylinder wall of the sliding screw sleeve (2) is radially provided with a long hole adapted to the rotation-preventing pin (3), the pressure-regulating pin (53) and the pressure-regulating pin (57), the two ends of the pressure-regulating pin (53) are provided with a fixed, circular couple is established to extension spring (56) upper and lower extreme, and the upper end couple overlaps on pressure regulating pin (53), and the lower extreme couple overlaps on pressure regulating pin (57), and spring (47) upper end supports in preventing revolving pin (3) under the natural state, and the lower extreme supports in fixed cover (52), stop collar (51) top, and pressure regulating nut (54) are established to pressure regulating pin (53) below, and pressure regulating nut (55) below supports in fixed cover (58), stop collar (59), and pressure regulating nut (55) cover is in sliding fit swivel nut (2) outer wall, and the pressure graduation apparatus is established to sliding fit swivel nut (2) outer wall.

Fig. 40 shows a single-arm type I-shaped structure of a combined external fixing bracket capable of adjusting pressure, in which a sliding screw sleeve is arranged as an upper sliding screw sleeve part (2) and a lower sliding screw sleeve part (15) which are fastened and connected by a connecting pin (14). The pressure regulating device is arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the elastic device is a compression spring (4); the connecting mechanism between the sliding screw sleeve lower part (15) and the fixed rod (6) is characterized in that the outer wall of the lower part of the sliding screw sleeve lower part (15) is provided with a cylindrical barrel wall thickening part, the side wall is radially provided with a fastening jackscrew (5), and two pipe clamping pins (27) radially penetrate through the fixed rod (6) and are respectively matched with the upper and lower steps of a fastening nut (26) and the lower end of the fastening nut (26); the upper part of the sliding screw sleeve (2) is radially provided with an anti-rotation pin (3), the outer wall of the adjusting rod (1) at the upper end of the sliding screw sleeve (2) is provided with a fastening nut (7), and the fixed rod (6) and the adjusting rod (1) are provided with a rod needle clamp (70).

Fig. 41 is a pressure-adjustable combined type external fixed support half-ring type I-shaped structure, which is composed of 2 pressure-adjusting fixing devices, a rod needle clamp (70), a rod clamp (71) and a half ring (72), wherein the rod clamp (71) is connected with an adjusting shaft (1), a fixing rod (6) and the half ring (72), and a sliding screw sleeve is arranged as an upper sliding screw sleeve part (2) and a lower sliding screw sleeve part (15) to be fixedly connected with a connecting pin (14). The pressure regulating device is arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the elastic device is a compression spring (4); the connecting mechanism between the sliding screw sleeve lower part (15) and the fixed rod (6) is characterized in that the outer wall of the lower part of the sliding screw sleeve lower part (15) is provided with a cylindrical barrel wall thickening part, the side wall is radially provided with a fastening jackscrew (5), and two pipe clamping pins (27) radially penetrate through the fixed rod (6) and are respectively matched with the upper and lower steps of a fastening nut (26) and the lower end of the fastening nut (26); the upper part of the sliding screw sleeve (2) is radially provided with an anti-rotation pin (3), the outer wall of the adjusting rod (1) at the upper end of the sliding screw sleeve (2) is provided with a fastening nut (7), and the fixed rod (6) and the adjusting rod (1) are provided with a rod needle clamp (70).

Fig. 42 is a pressure-adjustable combined type external fixed support ring type I structure, which is composed of 3 pressure-adjusting fixing devices, 3 rings (75), a threaded rod (74), a fixing nut (73), a needle fixing screw (76), a threaded upright post (77), 2/3 rings (78) and a fastening bolt (79), wherein the pressure-adjusting fixing devices are positioned between the lower 2 rings (75) and the upper ring (75), the upper or lower rings (75) are connected with the rings (75) through the threaded rod, and the sliding fit screw sleeve is arranged into a sliding fit screw sleeve upper part (2) and a sliding fit screw sleeve lower part (15) to be fixedly connected with a connecting pin (14). The pressure regulating device is arranged as follows: the pressure regulating device comprises a pressure regulating pin (38), a fixed sleeve (39), a limiting sleeve (37) and a pressure regulating nut (40); the elastic device is a compression spring (4); the connecting mechanism between the sliding screw sleeve lower part (15) and the fixed rod (6) is characterized in that the outer wall of the lower part of the sliding screw sleeve lower part (15) is provided with a cylindrical barrel wall thickening part, the side wall is radially provided with a fastening jackscrew (5), and two pipe clamping pins (27) radially penetrate through the fixed rod (6) and are respectively matched with the upper and lower steps of a fastening nut (26) and the lower end of the fastening nut (26); the upper part of the sliding screw sleeve (2) is radially provided with an anti-rotation pin (3), the outer wall of the adjusting rod (1) at the upper end of the sliding screw sleeve (2) is provided with a fastening nut (7), and the lower end of the fixing rod (6) and the inner wall at the upper end of the adjusting rod (1) are provided with threads to be fastened and connected with the ring (75) through a fastening bolt (79).

Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can also be realized by other structures, and each structure has multiple forms, and can be combined into a pressure-adjustable fixing device with multiple forms, and can be combined with a bar pin clamp, a bar clamp, a fixing rod, a fixing arm, a half ring, and a full ring into a single-arm type, a half ring type, a full ring type, and other various pressure-adjustable external fixing supports. Any changes or modifications that can be easily conceived by a person skilled in the art are intended to be covered by the scope of the present invention.

Claims (10)

1. A pressure adjustable fixation device for orthopedic clinical use, the pressure adjustable fixation device comprising: adjust pole, sliding fit swivel nut, resilient means, dead lever and fixed structure who adjusts the pole, its characterized in that: wherein,

the adjusting rod is a cylindrical rod with a hollow structure, the fixed rod is a cylindrical rod, the sliding screw sleeve is a cylindrical sleeve, the upper part of the sliding screw sleeve is provided with a cylindrical barrel wall thickening part, the inner diameter of the sliding screw sleeve is matched with the outer diameters of the adjusting rod and the fixed rod, the upper part of the sliding screw sleeve is sleeved with the lower part of the adjusting rod, and the lower part of the sliding screw sleeve is sleeved with the upper part of the fixed rod; wherein,

the adjusting rod can be slightly adjusted in the axial direction relative to the sliding screw sleeve, but cannot rotate relatively;

the fixed rod is fixed relative to the sliding screw sleeve;

the elastic device provides elastic force in the process of adjusting the adjusting rod axially up and down by micro motion;

the fixing structure of the adjusting rod is used for fixing the adjusting rod and limiting the axial sliding of the adjusting rod;

the ends of the adjusting rod and the fixing rod can be designed into other structural types to be connected with a circular ring or other needle fixing structures.

2. The pressure adjustable fixture of claim 1, wherein: the specific connection mode of the adjusting rod and the sliding screw sleeve is one of the following modes:

(a) the lower part of the adjusting rod is provided with anti-rotation pin holes with two through sides, and the axial height of the anti-rotation pin holes is slightly larger than the transverse width; the upper part of the sliding fit screw sleeve is provided with anti-rotation holes which are communicated with the two radial sides, and the aperture of each anti-rotation hole is matched with the transverse width of each anti-rotation pin hole; the anti-rotation pin radially penetrates through an anti-rotation hole of the sliding screw sleeve and an anti-rotation pin hole at the lower part of the adjusting rod, and the diameter of the anti-rotation pin is matched with the aperture of the anti-rotation hole;

(b) the lower part of the adjusting rod is provided with anti-rotation pin holes with two through sides, and the axial length and the height of the anti-rotation pin holes are slightly larger than the transverse width; the upper part of the sliding fit screw sleeve is provided with anti-rotation holes which are communicated with the two radial sides, and the diameter of each anti-rotation hole is matched with the transverse width of each anti-rotation pin hole; the key structure comprises two cylindrical key pins with the same size, wherein one cylindrical key pin is inserted into one side of a rotation preventing hole and one side of a rotation preventing pin hole, the other cylindrical key pin is inserted into the other side of the rotation preventing hole and the other side of the rotation preventing pin hole, and the diameter of each cylindrical key pin is matched with the aperture of the rotation preventing hole;

(c) the lower part of the adjusting rod is provided with anti-rotation pin holes with two through sides, and the axial length and the height of the anti-rotation pin holes are slightly larger than the transverse width; the upper part of the sliding fit screw sleeve is provided with anti-rotation holes which are communicated with the two radial sides, and the diameter of each anti-rotation hole is matched with the transverse width of each anti-rotation pin hole; a cylindrical key pin is inserted into the anti-rotation hole and one side of the anti-rotation pin hole, and the diameter of the cylindrical key pin is matched with the aperture of the anti-rotation hole;

(d) the inner wall of the upper part of the sliding screw sleeve and the outer wall of the lower part of the adjusting rod are provided with key grooves corresponding to the guide flat keys, the key grooves of the guide flat keys arranged on the outer wall of the lower part of the adjusting rod are slightly longer than the guide flat keys, and the guide flat keys are fixedly connected with the sliding screw sleeve through fixed key pins;

(e) the lower end of the adjusting rod is provided with a cylindrical outer diameter increasing part, the outer diameter of the increasing part is provided with an anti-rotation plane, the inner cylinder opening of the sliding screw sleeve is smaller than the inner diameter of the cylinder, the upper cylinder opening is connected with the adjusting rod in a sliding manner, and the inner wall of the upper part of the sliding screw sleeve is provided with a convex plane which is in sliding fit with the plane arranged at the lower end of the adjusting rod;

(f) the inner wall of the upper part of the sliding fit screw sleeve is provided with a raised plane, the lower end of the adjusting rod is provided with an anti-falling sleeve which is cylindrical, the anti-falling sleeve is tightly connected with the adjusting rod by a fastening pin, and the outer wall of the anti-falling sleeve is provided with a plane which is matched with the plane arranged on the inner wall of the upper part of the sliding fit screw sleeve;

(g) the upper barrel opening of the sliding fit screw sleeve is set to be smaller than the inner diameter of the barrel, the upper barrel opening is connected with the adjusting rod in a sliding mode, a protruding plane is arranged on the inner wall of the upper portion of the sliding fit screw sleeve, the lower end of the adjusting rod is provided with the anti-falling sleeve which is cylindrical, the anti-falling sleeve is connected with the adjusting rod in a fastening mode through the fastening jackscrew, the outer wall of the anti-falling sleeve is provided with a plane, and the plane is matched with the inner wall of.

3. A pressure adjustable fixture according to claim 1 or 2, wherein: as a further arrangement of the sliding fit screw sleeve (2), the sliding fit screw sleeve is divided into a plurality of parts, the upper part of the sliding fit screw sleeve is in sliding connection with the lower part of the adjusting rod, the lower part of the sliding fit screw sleeve is in fastening connection with the upper part of the fixing rod, and the lower end of the upper part of the sliding fit screw sleeve is in fastening connection with the upper end of the lower part through a connecting pin.

4. A pressure adjustable fixture according to claim 1 or 2, wherein: a fixing structure for fixing the adjusting rod is arranged to limit the adjusting rod to slide axially; the concrete structure is one of the following modes:

(a) the outer wall of the adjusting rod at the upper end of the sliding fit screw sleeve is provided with a fastening nut, the inner wall of the fastening nut is provided with threads and is in threaded connection with the adjusting rod, the fastening nut is adjusted downwards, the lower end of the fastening nut abuts against the upper end of the sliding fit screw sleeve, and the adjusting rod can be fixed;

(b) the upper part of the sliding fit screw sleeve is provided with a fastening jackscrew hole which is communicated with the radial single side and can screw the fastening jackscrew into the outer wall of the adjusting rod;

(c) a limiting sleeve is arranged on the outer wall of the adjusting rod at the upper end of the sliding screw sleeve, and the limiting sleeve is fixedly connected with the adjusting rod through a fastening jackscrew;

(d) a limiting clamping block is arranged on the outer wall of the adjusting rod at the upper end of the sliding screw sleeve, a round hole in sliding fit with the adjusting rod is axially arranged at one end of the limiting clamping block, a gap with the height of 2mm and communicated with the round hole and a fastening screw are arranged in the middle of the other end of the limiting clamping block, a threaded hole is formed in the limiting clamping block at the head end of the fastening screw, and the limiting clamping block can be fixed to the adjusting rod by screwing the fastening screw;

(e) the upper end of the sliding fit screw sleeve is provided with a limiting screw sleeve, the inner wall of the limiting screw sleeve is in threaded connection with the upper end of the sliding fit screw sleeve, and the upper end of the limiting screw sleeve is in sliding connection with the adjusting rod.

5. A pressure adjustable fixture according to claim 1 or 2, wherein: the concrete connection mode of the sliding fit thread sleeve and the fixed rod is one of the following modes:

(a) the upper part of the fixed rod is fixedly connected with the lower part of the sliding screw sleeve through a fastening jackscrew;

(b) the upper part of the fixed rod is fixedly connected with the lower part of the sliding screw sleeve by a fastening pin;

(c) the upper end of the fixed rod is in threaded connection with the lower part of the sliding screw sleeve, and the fixed rod is fastened by a fastening nut;

(d) the fixed rod and the sliding screw sleeve are integrated, and the upper part of the fixed rod is provided with a cylindrical diameter increasing part which is in a cylindrical structure;

(e) the outer wall of the lower part of the sliding fit screw sleeve is provided with a fixed screw sleeve which is fixedly connected with the sliding fit screw sleeve through a fixed pin, the fixed screw sleeve is radially provided with a fastening screw, the fastening screw is in threaded connection with the fixed screw sleeve and the lower part of the sliding fit screw sleeve, the head end of the fastening screw corresponds to a step arranged on the side surface of the upper end of the fixed rod, and the fixed rod is fixed; the fixed rod is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve and the lower portion of the fastening nut, two pin holes which are radially communicated are formed in the fixed rod at different axial heights, and after the two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up-and-down movement of the fastening nut;

(f) the outer wall of the lower part of the sliding fit screw sleeve is provided with a cylindrical wall thickened part, a fastening screw is radially arranged, the fastening screw is in threaded connection with the lower part of the sliding fit screw sleeve, the head end of the fastening screw corresponds to a step arranged on the side face of the upper end of the fixed rod, and the fixed rod is fixed; the fixed rod is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve and the lower portion of the fastening nut, two pin holes which are radially communicated are formed in the fixed rod at different axial heights, and after the two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up-and-down movement of the fastening nut;

(g) the outer wall of the lower part of the sliding fit screw sleeve is provided with a threaded gasket, a fixed rod screw and a fixed rod screw sliding hole, the inner wall of the threaded gasket is provided with threads, a circular hole is radially formed and is in threaded connection with the lower part of the sliding fit screw sleeve, the fixed rod screw radially traverses the threaded gasket circular hole, the head end of the fixed rod screw is in threaded connection with the upper part of the fixed rod, and the axial diameter of the fixed rod screw sliding hole is larger than the transverse diameter; the fixed rod is arranged to be in sliding fit with the lower portion of the sliding fit screw sleeve and the lower portion of the fastening nut, two pin holes which are radially communicated are formed in the fixed rod at different axial heights, and after the two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up-and-down movement of the fastening nut;

(h) the outer wall of the lower part of the sliding fit screw sleeve is provided with a threaded gasket, a fixed rod screw sliding hole and a positioning nut, the inner wall of the threaded gasket is provided with threads, a circular hole is radially formed and is in threaded connection with the lower part of the sliding fit screw sleeve, the fixed rod screw radially traverses the threaded gasket circular hole, the head end of the fixed rod screw is in threaded connection with the upper part of a fixed rod, the axial diameter of the fixed rod screw sliding hole is larger than the transverse diameter, and the positioning nut is in threaded connection with the lower part of the sliding fit screw sleeve and is arranged below the threaded gasket; the fixed rod is arranged to be in sliding fit with the lower part of the sliding fit screw sleeve, and the upper end of the fixed rod is radially provided with a screw hole matched with the fixed rod screw;

(i) the outer wall of the lower part of the sliding screw sleeve is provided with a connecting screw sleeve which is in threaded connection with the sliding screw sleeve and then is fastened and connected by a fixing pin, a fastening screw is radially arranged on the connecting screw sleeve, the head end of the fastening screw corresponds to a step arranged on the side surface of the upper end of the fixing rod, and the fixing rod is fixed; the fixed rod is arranged to be in sliding fit with the lower part of the sliding fit screw sleeve, the lower part of the connecting screw sleeve and the lower part of the fastening nut, two pin holes which are radially communicated are arranged on the fixed rod at different axial heights, and after two pipe clamping pins radially penetrate through the pin holes of the fixed rod, the two pipe clamping pins are respectively matched with the upper step and the lower step of the fastening nut and the lower end of the fastening nut and can drive the fixed rod to move up and down along with the up and down movement of the fastening nut;

(j) the outer wall of the lower portion of the sliding fit screw sleeve is provided with a position adjusting nut and a position adjusting nut, a fixed rod pin sliding hole with two communicated sides is radially arranged, the axial length of the fixed rod pin sliding hole is larger than the transverse width, the fixed rod is arranged in sliding fit with the lower portion of the sliding fit screw sleeve, a fixed rod pin is radially arranged at the upper end of the fixed rod pin, and 2 position adjusting nuts are respectively arranged above and below the fixed rod pin and in threaded connection with the lower portion of the sliding fit screw sleeve, and can drive the fixed rod pin and the fixed rod to move up and.

6. A pressure adjustable fixture according to claim 1 or 2, wherein: establish one-way pressure regulating device on the sliding fit swivel nut barrel, the sliding fit swivel nut outer wall establishes the pressure scale, one-way pressure regulating device's concrete structure is one of following mode:

(a) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with a pressure regulating pin hole with two through sides, and the axial length of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device is a compression spring, the upper end of the compression spring is abutted against the lower end of the adjusting rod, and the lower end of the compression spring is abutted against the pressure adjusting pin;

(b) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device is an elastic capsule and is also provided with an elastic capsule base, the upper end of the elastic capsule is abutted against the lower end surface of a tail cap of the adjusting rod arranged at the lower end of the adjusting rod, the lower end of the elastic capsule is abutted against the elastic capsule base, and the elastic capsule base is arranged on the pressure adjusting pin;

(c) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device consists of a compression spring, a pressure sensor and a pressure display, wherein the upper end of the compression spring is abutted against the lower end of the adjusting rod, the lower end of the compression spring is abutted against the upper end of the pressure sensor, the lower end of the pressure sensor is abutted against the pressure adjusting pin, and the pressure sensor is connected with the pressure display through the pressure adjusting pin hole;

(d) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve, a limiting sleeve and a pressure regulating nut; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, and the diameter of the pressure regulating pin is matched with the aperture of the pressure regulating pin hole; the cylinder opening of the limiting sleeve is smaller than the inner diameter of the lower part, is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve; the elastic device consists of an elastic capsule and a pressure display, and is also provided with an elastic capsule base, the upper end of the elastic capsule is abutted against the lower end surface of a tail cap of the adjusting rod arranged at the lower end of the adjusting rod, the lower end of the elastic capsule is abutted against the elastic capsule base, the elastic capsule base is arranged on a pressure regulating pin, and the elastic capsule is connected with the pressure display through a pressure regulating pin hole;

(e) the spring is positioned outside the cylinder wall of the sliding fit screw sleeve, a spring stopping pin and a pressure regulating pin are arranged below the adjusting rod, a long hole matched with the spring stopping pin and the pressure regulating pin is radially arranged on the sliding fit screw sleeve, a fixing sleeve and a limiting sleeve are respectively arranged at two ends of the spring stopping pin, a fixing sleeve and a limiting sleeve are respectively arranged at two ends of the pressure regulating pin, the upper part of the spring stopping pin is abutted against the lower end of the adjusting rod, threads are arranged outside the cylinder wall of the sliding fit screw sleeve, a pressure regulating nut is arranged outside the cylinder wall of the sliding fit screw sleeve, the upper end of the pressure regulating nut abuts against the lower end of the fixing sleeve sleeved on the spring stopping pin, and the lower end of the pressure regulating pin abuts against the upper end of the;

(f) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve and a limiting sleeve; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, the pressure regulating pin is in interference fit with the regulating rod, the fixed sleeve is in interference fit with the pressure regulating pin, a barrel opening on the limiting sleeve is smaller than the inner diameter of the lower part, the limiting sleeve is positioned outside the fixed sleeve and is in interference fit with the fixed sleeve, and the fixed sleeve and the limiting sleeve are in sliding fit with the sliding screw sleeve; the spring is a compression spring sleeved below the adjusting rod, the lower end of the compression spring abuts against the pressure adjusting pin, the inner diameter of the upper cylinder wall of the sliding screw sleeve is small, the inner diameter of the lower cylinder wall of the sliding screw sleeve is large, and the upper end of the spring abuts against a step arranged on the inner wall of the sliding screw sleeve in a natural state;

(g) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve and a limiting sleeve; the sliding fit screw sleeve is radially provided with pressure regulating pin holes with two through sides, and the axial length height of each pressure regulating pin hole is larger than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding screw sleeve and a pressure regulating pin hole of the fixed sleeve, the pressure regulating pin is in interference fit with the regulating rod, an anti-rotation pin and the anti-rotation pin hole are arranged below the regulating rod, the spring is a compression spring sleeved below the regulating rod, the lower end of the compression spring abuts against the pressure regulating pin, the inner diameter of the upper cylinder wall of the sliding screw sleeve is small, the inner diameter of the lower cylinder wall of the sliding screw sleeve is large, and the upper end of the spring naturally abuts against a step arranged on the inner wall of the sliding screw sleeve;

(h) the pressure regulating device comprises a pressure regulating pin, a fixed sleeve and a limiting sleeve, a pressure regulating pin hole with two through sides is radially arranged on the sliding screw sleeve, and the axial length height of the pressure regulating pin hole is greater than the transverse width; the fixed sleeve is sleeved on the outer wall of the sliding screw sleeve in a sliding manner, and a through round hole is radially arranged on the fixed sleeve; the pressure regulating pin radially penetrates through a pressure regulating pin hole of the sliding fit screw sleeve and a pressure regulating pin hole of the fixed sleeve, the pressure regulating pin is in interference fit with the regulating rod, the anti-rotation pin and the anti-rotation pin hole are not arranged below the regulating rod, the spring is a compression spring sleeved on the outer wall of the sliding fit screw sleeve, the lower end of the compression spring abuts against the pressure regulating pin, the outer diameter of the upper cylinder wall of the sliding fit screw sleeve is large, the outer diameter of the lower cylinder wall of the sliding fit screw sleeve is small, and the upper end of the spring naturally abuts against a step arranged on the outer wall of the;

(i) the elastic device can be set as a tension spring, is positioned in the cylinder wall of the sliding fit screw sleeve and is in sliding connection with the sliding fit screw sleeve, the lower part of the adjusting rod is provided with a rotation-proof pin, the adjusting rod is in fastening fit with the rotation-proof pin, the lower end of the adjusting rod is axially provided with a long groove matched with the upper part of the tension spring, two ends of the rotation-proof pin are provided with a fixed sleeve and a limiting sleeve, the fixed sleeve and the limiting sleeve are in sliding connection with the sliding fit screw sleeve, a positioning nut is arranged below the rotation-proof pin and is in threaded connection with the sliding fit screw sleeve, the cylinder wall of the sliding fit screw sleeve is provided with a rotation-proof pin hole matched with the rotation-proof pin, the axial length is greater than the radial length, the upper rotation positioning nut can push the fixed sleeve, the limiting sleeve, the rotation-proof pin and the adjusting rod to move upwards integrally, the upper end and the lower end of the tension spring are provided with circular hooks, the upper end of the, a pressure regulating nut is arranged above the limiting sleeve, the lower part of the pressure regulating nut abuts against the fixed sleeve and the limiting sleeve, the pressure regulating nut is sleeved on the outer wall of the sliding screw sleeve and is in threaded connection with the sliding screw sleeve, a pressure regulating pin hole matched with the pressure regulating pin is formed in the wall of the sliding screw sleeve, the axial length is greater than the radial length, and the downward-rotating pressure regulating nut can drive the fixed sleeve, the limiting sleeve, the pressure regulating pin and the tension spring to move downwards;

(j) the spring is positioned in the wall of the sliding screw sleeve, the lower part of the adjusting rod axially penetrates through the spring, the lower part of the adjusting rod is provided with a pressure regulating pin and a pressure regulating pin, the lower part of the adjusting rod is radially provided with a long hole matched with the pressure regulating pin, the pressure regulating pin radially penetrates through the adjusting rod and is fixedly connected with the adjusting rod, two ends of the pressure regulating pin are respectively provided with a fixing sleeve and a limiting sleeve, the wall of the sliding screw sleeve is externally provided with a thread, the long hole matched with the pressure regulating pin and the pressure regulating pin is radially arranged, the inner diameter of the wall of the upper part of the sliding screw sleeve is larger than the inner diameter of the wall of the lower part, the upper part of the fixing rod is a cylindrical diameter-enlarged part and is in sliding;

(k) the spring is located outside the sliding fit thread sleeve wall, adjust the pole lower part and establish the pressure regulating pin, adjust the radial slot hole of establishing and adapting with the pressure regulating pin in pole lower part, the pressure regulating pin radially runs through the regulation pole, with adjust pole fastening connection, fixed cover is established respectively at pressure regulating pin both ends, the stop collar, sliding fit thread outside the thread of thread sleeve wall, radial setting and pressure regulating pin, the slot hole that the pressure regulating pin suited, sliding fit thread sleeve wall peripheral hardware pressure regulating nut, pressure regulating nut upper end is supported in fixed cover, the stop collar lower extreme, the pressure regulating nut lower extreme.

7. A pressure adjustable fixture according to claim 1 or 2, wherein: establish two-way pressure regulating device on the sliding fit swivel nut barrel, the sliding fit swivel nut outer wall establishes the pressure scale, two-way pressure regulating device's concrete structure is one of following mode:

(a) the spring is positioned in the wall of the sliding screw sleeve, the lower part of the adjusting rod axially penetrates through the spring, the lower part of the adjusting rod is radially provided with a pressure regulating pin and a pressure regulating pin, the radial direction of the pressure regulating pin and the long hole matched with the pressure regulating pin are respectively provided with a long hole, the axial length of the pressure regulating pin is greater than the radial length of the pressure regulating pin, two ends of the pressure regulating pin are respectively provided with a fixed sleeve and a limiting sleeve, the wall of the sliding screw sleeve is externally provided with a thread, the radial direction of the long hole matched with the pressure regulating pin and the pressure regulating pin is provided with a long hole, the inner diameter of the wall of the lower part of the sliding screw sleeve is greater than the inner diameter of the wall of the upper part of the sliding screw sleeve; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(b) the spring is positioned outside the wall of the sliding screw sleeve, the lower part of the adjusting rod is radially provided with a pressure regulating pin and a pressure regulating pin, the radial direction of the adjusting rod is respectively provided with a long hole which is adaptive to the pressure regulating pin and the pressure regulating pin, the two ends of the pressure regulating pin are respectively provided with a fixed sleeve and a limiting sleeve, the outer part of the wall of the sliding screw sleeve is provided with a thread, the radial direction of the long hole is provided with a long hole which is adaptive to the pressure regulating pin and the pressure regulating pin, the outer part of the wall of the sliding screw sleeve is provided with; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(c) the elastic device is set into 2 springs, the adjusting rod is upwards and downwards provided with a pressure-regulating form, the springs are positioned in the cylinder wall of the sliding screw sleeve, the lower part of the adjusting rod axially penetrates through the springs, pressure-regulating pins and spring-blocking pins are radially arranged at the lower part of the adjusting rod, long holes matched with the pressure-regulating pins are radially arranged at the lower part of the adjusting rod, two ends of the pressure-regulating pins are respectively provided with a fixed sleeve and a limiting sleeve, the spring-blocking pins radially penetrate through the adjusting rod and are fixedly connected with the adjusting rod, the upper end of the spring is abutted against the pressure-regulating pins and the lower end of the spring-blocking pins in a natural state, the springs are positioned in the cylinder wall of the sliding screw sleeve, the pressure-regulating pins radially penetrate through the cylinder wall of the sliding screw sleeve, the two ends of the fixed sleeve and the limiting sleeve are respectively provided with the fixed sleeve and the limiting sleeve, the upper end of the spring is abutted against the spring-, the upper part of the fixed rod is a cylindrical part with a larger diameter and is in sliding fit with the inner wall of the lower part of the sliding screw sleeve, a pressure regulating nut and a pressure regulating nut are arranged outside the wall of the sliding screw sleeve, the upper end of the pressure regulating nut abuts against the lower ends of the fixed sleeve and the limiting sleeve, and the lower end of the pressure regulating nut abuts against the upper ends of the fixed sleeve and the limiting sleeve; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(d) the elastic device is set into 2 springs, the adjusting rod is upwards and downwards provided with a pressure-adjustable form, the springs and the springs are positioned outside the wall of the sliding screw sleeve, the adjusting rod axially penetrates through the springs and the springs, a screw bolt for preventing rotation and a spring stopping pin are radially arranged at the lower part of the adjusting rod, a long hole matched with the screw bolt for preventing rotation is radially arranged on the adjusting rod, the axial length is greater than the radial length, the screw bolt for preventing rotation is tightly connected with the sliding screw sleeve, the spring stopping pin radially penetrates through the adjusting rod and is tightly connected with the adjusting rod, the sliding screw sleeve is radially provided with a long hole matched with the spring stopping pin, the axial length is greater than the radial length, a pressure-adjusting nut and a pressure-adjusting nut are arranged outside the wall of the sliding screw sleeve and are in threaded connection with the sliding screw sleeve, the upper end of the spring abuts against the pressure-adjusting nut and the lower end abuts against the spring stopping pin, the upper end, the adjusting rod is provided with an upward acting force, the pressure regulating nut is screwed downwards, the spring blocking pin can be driven to move downwards, and the adjusting rod is provided with a downward acting force; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(e) the elastic device is set into 2 springs, the adjusting rod can be adjusted in pressure by upwards and downwards giving, the springs are positioned above the sliding screw sleeve, the adjusting rod axially penetrates through the springs, the springs are positioned outside the cylinder wall of the sliding screw sleeve, the sliding screw sleeve axially penetrates through the springs, the upper end of the sliding screw sleeve is provided with a pressure adjusting screw sleeve, the upper end of the sliding screw sleeve is slidably connected with the adjusting rod, the lower inner wall of the sliding screw sleeve is provided with threads and is in threaded connection with the sliding screw sleeve, the adjusting rod is provided with a fastening nut and is in threaded connection with the adjusting rod to limit the sliding of the adjusting rod, the adjusting rod is radially provided with a pressure adjusting pin, an anti-rotation pin and a stop spring pin, the adjusting rod is radially provided with a long hole matched with the anti-rotation pin, the axial length is larger than the radial length, the anti-rotation pin is tightly connected with the sliding screw sleeve, the pressure adjusting pin, a pressure regulating nut is arranged outside the wall of the sliding screw sleeve and is in threaded connection with the sliding screw sleeve, the upper end of the spring is abutted against the pressure regulating screw sleeve in a natural state, the lower end of the spring is abutted against the pressure regulating pin, the upper end of the spring is abutted against the spring blocking pin, and the lower end of the spring is abutted against the pressure regulating nut; the outer wall of the sliding screw sleeve is provided with a pressure dial gauge;

(f) the elastic device is provided with 2 springs, the adjusting rod is upwards and downwards provided with a mode of adjusting pressure, the springs and the springs are both positioned above the sliding screw sleeve, the adjusting rod axially penetrates through the springs and the springs, the pressure adjusting screw sleeve is arranged at the upper end of the sliding screw sleeve, the upper end of the adjusting rod is connected with the adjusting rod in a sliding mode, the inner wall of the lower portion of the adjusting rod is provided with threads and is in threaded connection with the sliding fit screw sleeve, the outer wall of the adjusting screw sleeve is provided with threads, the upper portion of the adjusting rod is provided with the adjusting screw sleeve, the adjusting rod is radially provided with a stop spring pin and an anti-rotation pin, the stop spring pin is in fastening connection with the adjusting rod, the adjusting rod is radially provided with a long hole matched with the anti-rotation pin, the anti-rotation pin is in fastening connection with the sliding fit screw sleeve, the upper end of the spring naturally abuts against the adjusting screw sleeve, the lower end of the spring abuts against the stop spring pin, the upper end of the spring abuts against the stop spring pin, the lower end of the spring;

(g) the elastic device can be set into 2 springs, the adjusting rod can be upwards and downwards provided with a pressure-adjustable form, the springs are positioned outside the wall of the sliding screw sleeve, the tension spring is positioned in the wall of the sliding screw sleeve, the lower end of the adjusting rod is axially provided with a long groove matched with the upper part of the tension spring, the lower part of the adjusting rod is radially provided with a screw bolt for preventing rotation and a pressure-adjustable pin, the adjusting rod is fixedly connected with the screw bolt for preventing rotation and the pressure-adjustable pin, the pressure-adjustable pin is radially arranged on the wall of the sliding screw sleeve, a long hole matched with the screw bolt for preventing rotation, the pressure-adjustable pin and the pressure-adjustable pin is radially arranged, the axial length is greater than the radial length, the two ends of the pressure-adjustable pin are provided with a fixed sleeve and a limiting sleeve, the upper end of the, The pressure regulating nut is arranged above the limiting sleeve and below the pressure regulating pin and is in threaded connection with the sliding threaded sleeve, the fixed sleeve and the limiting sleeve are abutted to the lower portion of the pressure regulating nut, the pressure regulating nut is sleeved on the outer wall of the sliding threaded sleeve, and the pressure dial gauge is arranged on the outer wall of the sliding threaded sleeve.

8. The utility model provides an orthopedics clinical application's combination formula external fixator of adjustable pressure which characterized in that: a single-arm type pressure-adjustable combined external fixing bracket is formed by combining 1 pressure-adjustable fixing device as claimed in any one of claims 1 to 7 with a needle clamping block or a needle clamping block, a rod clamping block and a fixing rod.

9. The utility model provides an orthopedics clinical application's combination formula external fixator of adjustable pressure which characterized in that: a semi-ring type pressure adjustable combined external fixing bracket is formed by combining 2 pressure adjustable fixing devices according to any one of claims 1 to 7 with 2 semi-rings, bar clamping blocks, bar needle clamping blocks and fixing bars.

10. The utility model provides an orthopedics clinical application's combination formula external fixator of adjustable pressure which characterized in that: the combined type external fixing bracket with adjustable pressure is formed by combining 3 or 4 adjustable pressure fixing devices according to any one of claims 1 to 7 with 4 or 5 rings or 2/3 rings, threaded rods, fixing nuts, pin fixing screws, threaded columns and fastening bolts.