CN114831781A - Height measurement and mold testing instrument with force limiting mechanism - Google Patents

Abstract

The invention relates to a height measuring and mold testing instrument with a force limiting mechanism, which comprises an outer sleeve, a connecting rod, an operating handle, a telescopic height measuring component, a torque force-to-linear moving component and a torque force limiting component, wherein one end of the outer sleeve is connected with the operating handle, the connecting rod is sleeved in the outer sleeve and is axially and slidably connected with the outer sleeve, one end of the connecting rod extends into the operating handle and is connected with the torque force-to-linear moving component, the torque force limiting component is assembled at the operating handle and is connected and matched with the torque force-to-linear moving component, the torque force limiting component is used for applying torque force and limiting the maximum output value of the torque force, the torque force-to-linear moving component is used for converting the torsional motion into linear motion, so that the connecting rod is driven to axially stretch, and the telescopic height measuring component is driven to radially expand or contract in the stretching process of the connecting rod. The advantages are that: the intervertebral pressure load limiting and adjusting device has the function of limiting and adjusting intervertebral pressure load, and can conveniently and accurately adjust the magnitude of transmission torque to limit the pressure load in the intervertebral jacking process.

Description

Height measurement and mold testing instrument with force limiting mechanism

Technical Field

The invention relates to the technical field of medical instruments, in particular to a height measuring and mold testing instrument with a force limiting mechanism.

Background

At present, among the operation is implanted to spine interbody fusion cage, need survey the most suitable height of strutting of patient's intervertebral, and present mainstream mode is implanted for using not the mould of co-altitude in proper order, judges whether suitable, the process shortcoming through operator's feeling and formation of image the mould: firstly, the method is complicated and different moulds need to be tried out respectively; ② there is no clear evaluation index, which is appropriate; and thirdly, the harm to the body of the patient is large in the multiple-time mold testing. Especially aiming at the defects that in the process of implanting the intervertebral fusion device, the upper vertebral body and the lower vertebral body can be just supported after being implanted, so that the whole load of the upper vertebral body is transferred to the intervertebral fusion device. Therefore, the implantation effect is higher than the original intervertebral space in principle, but is higher than the original intervertebral space in particular, and depends on the degree of intervertebral pathological changes. When the upper and lower vertebral bodies are expanded, the test model head expander can bear pressure load, when the expanded height is larger than the original height, the pressure load is larger, and the pressure loads corresponding to the same expanded height of different patients are possibly different, so that the pressure load can be used as an important index for evaluating the specific expanded height instead of the height. Therefore, a new instrument is urgently needed for the intervertebral cage implantation operation to be put into the intervertebral trial process.

Disclosure of Invention

The invention aims to solve the technical problem of providing a height measuring and die testing instrument with a force limiting mechanism, which effectively overcomes the defects of the prior art.

The technical scheme for solving the technical problems is as follows:

a height measuring and mold testing apparatus with a force limiting mechanism comprises an outer sleeve, a connecting rod, an operating handle, a telescopic height measuring assembly, a torque force-to-linear moving assembly and a torque force limiting assembly, wherein one end of the outer sleeve is connected with the operating handle, the connecting rod is sleeved in the outer sleeve and is axially and slidably connected with the outer sleeve, one end of the connecting rod extends into the operating handle and is connected with the torque force-to-linear moving assembly, the torque force limiting assembly is assembled at the operating handle and is connected and matched with the torque force-to-linear moving assembly, the torque force limiting assembly is used for applying torque force to the torque force-to-linear moving assembly and limiting the maximum output value of the torque force, the torque force-to-linear moving assembly is used for converting the torque movement into linear movement so as to drive the connecting rod to axially extend and retract relative to the outer sleeve, the connecting rod drives the telescopic height measuring component to radially expand or contract in the telescopic process.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the torque force-to-linear moving assembly comprises a screw rod and a driving wheel, the screw rod is arranged in the operating handle, one end of the screw rod is coaxially connected with one end of the connecting rod, a nut is screwed at the other end of the screw rod, the nut is coaxially connected and fixed with the driving wheel, the driving wheel is rotatably connected with an inner cavity of the operating handle, and the torque force limiting assembly is connected and matched with the driving wheel and used for applying torque force to the driving wheel.

Furthermore, the outer surface of the driving wheel is coaxially provided with a limiting ring, the inner cavity of the operating handle is provided with a ring groove which is coaxially arranged with the limiting ring, and the limiting ring is embedded into the ring groove.

Furthermore, one end of the screw rod is coaxially connected with one end of the connecting rod through a straight pull connecting piece, an indicator vertical to the connecting rod is arranged on the straight pull connecting piece, a transparent window is arranged on the operating handle corresponding to the indicator, and a scale mark line axially arranged along the connecting rod is arranged at the transparent window.

Further, the torque force limiting assembly comprises a torque wheel and a torque transmission member, the torque wheel is coaxially arranged at one end of the driving wheel far away from the nut, one end of the torque transmission member is axially and slidably connected with the torque wheel, the other end of the torque transmission member penetrates out of the operating handle and is rotatably connected with the operating handle, an elastic member which extends and retracts along the axial direction of the torque wheel is arranged between the torque wheel and the torque transmission member, one end of the driving wheel close to the torque wheel is circumferentially provided with a circle of first helical teeth with the same inclination direction, one end of the torque wheel is circumferentially provided with second helical teeth which are meshed with the first helical teeth, and the connecting rod can axially move relative to the outer sleeve so as to drive the telescopic height measuring assembly to radially expand or contract.

Further, the torque transmission member is a rod-shaped member, a through hole is provided at an end of the torque wheel remote from the nut, and an end of the torque transmission member is inserted into the through hole and is axially slidably connected to the torque wheel.

Further, sliding holes penetrating through the side walls of the torque wheel are symmetrically formed in the side walls of the through hole, the sliding holes extend in the axial direction of the torque wheel, guide pins are vertically formed in two sides of one end of the torque transmission member respectively, and the guide pins penetrate through the sliding holes in the corresponding side in a one-to-one correspondence manner.

Further, the elastic member is a spring sleeved at one end of the torque transmission member, a positioning block is further arranged at one end of the torque transmission member, the positioning block can slide along the torque transmission member to adjust the elastic force of the spring, and is fixed with the torque transmission member through a fixing member after adjustment, one end of the spring extends into the through hole, and two ends of the spring respectively abut against the hole bottom of the through hole and the positioning block.

Further, the other end of the torque transmission member is connected with a rotating handle.

Further, the telescopic height measuring assembly comprises a first height measuring block and a second height measuring block, the first height measuring block and the second height measuring block are symmetrically distributed on two sides of the other end of the connecting rod, a driving block is arranged at the end part of the other end of the connecting rod, a fixed block close to the driving block is further sleeved at the other end of the connecting rod, the fixed block is fixedly connected with the end part of the other end of the outer sleeve, convex guide strips are respectively arranged on two sides of one end, close to the driving block and the fixed block, of the driving block and the two guide strips on two sides are symmetrically distributed, the two guide strips on the same side are distributed in a splayed shape and extend obliquely towards one end, far away from the guide strips, a telescopic chute is formed between the two guide strips on the same side, a first sliding surface and a second sliding surface which are parallel to the guide strips on the same side are respectively arranged on the parts, corresponding to two ends of the telescopic chute, of the driving block and the fixed block, the first sliding surface and the second sliding surface respectively form a guide groove with the guide strip close to the first sliding surface and the second sliding surface, the middle parts of the sides, close to each other, of the first height measuring block and the second height measuring block are respectively provided with a displacement block, the two ends of the sides, close to each other, of the first height measuring block and the second height measuring block are respectively provided with guide blocks distributed in a splayed shape, the displacement blocks are isosceles trapezoid blocks matched with the telescopic chutes and are embedded into the telescopic chutes on the corresponding sides, and the guide blocks are respectively embedded into the guide grooves on the corresponding sides in a one-to-one correspondence manner.

The invention has the beneficial effects that: the intervertebral pressure load limiting and adjusting device has the function of limiting and adjusting intervertebral pressure load, and can conveniently and accurately adjust the magnitude of transmission torque to limit the pressure load in the intervertebral jacking process.

Drawings

FIG. 1 is an isometric view of a height measuring and mold testing instrument with a force limiting mechanism of the present invention;

FIG. 2 is a cross-sectional view of the structure of the height measuring and mold testing apparatus with a force limiting mechanism of the present invention;

FIG. 3 is a schematic structural view of a telescopic height measuring assembly in the height measuring and mold testing apparatus with a force limiting mechanism of the present invention;

FIG. 4 is a schematic structural diagram of the distribution of the driving block and the fixing block in the height measuring and mold testing device with the force limiting mechanism of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an outer sleeve; 2. a connecting rod; 3. an operating handle; 4. a telescopic height measurement assembly; 6. a displacement block; 7. a guide block; 21. a drive block; 22. a fixed block; 23. a guide strip; 24. a telescopic chute; 41. a first height measurement block; 42. a second height measurement block; 51. a screw; 52. a drive wheel; 53. a torque wheel; 54. a torque transmission member; 55. a nut; 56. an elastic member; 57. a straight pull connecting piece; 58. an indicator; 211. a first slip plane; 221. a second slip plane; 521. a limiting ring; 522. a first helical tooth; 531. a second helical tooth; 532. a slide hole; 541. a guide pin; 542. positioning blocks; 543. the handle is rotated.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example (b): as shown in fig. 1 and 2, the height measuring and mold testing apparatus with force limiting mechanism of the present embodiment includes anouter sleeve 1, a connectingrod 2, anoperating handle 3, a telescopic height measuringcomponent 4, a torque force to linear movement component and a torque force limiting component, wherein one end of theouter sleeve 1 is connected to theoperating handle 3, theconnecting rod 2 is sleeved in theouter sleeve 1 and is axially slidably connected to theouter sleeve 1, one end of the connectingrod 2 extends into theoperating handle 3 and is connected to the torque force to linear movement component, the torque force limiting component is assembled at theoperating handle 3 and is connected and matched with the torque force to linear movement component, the torque force limiting component is used for applying a torque force to the torque force to linear movement component and limiting a maximum output value of the torque force, the torque force to linear movement component is used for converting the torque movement into linear movement, thereby driving the connectingrod 2 to axially extend and retract relative to theouter sleeve 1, and driving the telescopic height measuringcomponent 4 to radially expand or retract in the extending and retracting process of the connectingrod 2.

The using process is as follows:

the operation apparatus stretches into telescopic height finding subassembly 4 intervertebral, then the subassembly is applyed to operation torsion limit power and is applyed the torsion to torsion commentaries on classics rectilinear movement subassembly (this torsion has set for the maximum value according to clinical experience when dispatching from the factory, torsion can only effectively be applyed to the maximum value), afterwards, torsion commentaries on classics rectilinear movement subassembly turns into the torsion that transmits to connectingrod 2 and for the rectilinear movement ofouter tube 1, order about connectingrod 2 promptly forouter tube 1 axial displacement, in the moving process, order about telescopicheight finding subassembly 4 along the long axial perpendicular to strutting of the connectingrod 2 other end, thereby strut upper and lower centrum, it is to notice: the maximum height for expanding the upper and lower vertebral bodies depends on the effective maximum application value of the torsion, and the maximum height for expanding the upper and lower vertebral bodies is also determined after the maximum value of the torsion is set, so that any medical personnel can only expand the maximum height to protect the safe pressure load when the vertebral bodies are expanded, and the whole instrument has the following advantages: firstly, different telescopicheight measuring assemblies 4 are not required to be tried; secondly, the method has clear evaluation indexes for judging whether the implantation is proper or not; and the harm to the body of the patient is greatly reduced by internal jacking and pressure load limitation.

It should be added that: a strip-shaped hole is formed in the long axis direction of theouter sleeve 1, and a limiting pin penetrating through the strip-shaped hole is arranged on the outer surface of the connectingrod 2, so that the connectingrod 2 can only move axially relative to theouter sleeve 1.

In a preferred embodiment, the torque force-to-linear movement means includes ascrew 51 and adriving wheel 52, thescrew 51 is disposed in theoperating handle 3, one end of the screw is coaxially connected to one end of the connectingrod 2, the other end of the screw is screwed with anut 55, thenut 55 is coaxially connected and fixed to thedriving wheel 52, thedriving wheel 52 is rotatably connected to an inner cavity of theoperating handle 3, and the torque force-limiting means is connected to and engaged with thedriving wheel 52 for applying a torque force to thedriving wheel 52.

In the above embodiment, when the torque force limiting component applies torque force to thedriving wheel 52, thedriving wheel 52 and thenut 55 are driven to rotate, and since thedriving wheel 52 and thenut 55 are axially fixed, the connectingrod 2 cannot rotate along with the nut 55 (i.e. thescrew rod 51 cannot rotate), therefore, thenut 55 can drive thescrew rod 51 and the connectingrod 2 to axially move relative to theouter sleeve 1, and the whole design is reasonable and the operation is stable.

In a preferred embodiment, astopper ring 521 is coaxially provided on the outer surface of thedriving wheel 52, an annular groove is coaxially provided in the inner cavity of theoperating handle 3 with thestopper ring 521, and thestopper ring 521 is fitted into the annular groove.

In the above embodiment, the engagement of the ring groove and theretainer ring 521 can ensure that thedriving wheel 52 has good rotational movement and does not move in the axial direction.

In a preferred embodiment, one end of thescrew 51 is coaxially connected to one end of thelink 2 through astraight pull connection 57, anindicator 58 perpendicular to thelink 2 is provided on thestraight pull connection 57, a transparent window is provided on theoperating handle 3 at a position corresponding to theindicator 58, and a scale mark is provided along the axial direction of thelink 2 at the transparent window.

In the above embodiment, the moving lengths of thescrew 51 and the connectingrod 2 are actually associated with the distraction height of the telescopicheight finding component 4, and there is a relationship of movement conversion, so that when the instrument is factory-set, the scale mark line is associated with the distraction height of the telescopicheight finding component 4, that is, the scale mark line can directly represent the distraction height change, therefore, when thescrew 51 and the connectingrod 2 move linearly, theindicator 58 is driven to move relative to the scale mark line, so that the distraction height data is directly read out, the design is very ingenious, and the medical staff can be facilitated to directly read out the distraction height information of the intervertebral.

In a preferred embodiment, the torque force limiting assembly comprises atorque wheel 53 and atorque transmission member 54, thetorque wheel 53 is coaxially disposed at one end of thedriving wheel 52 away from thenut 55, one end of thetorque transmission member 54 is axially slidably connected to thetorque wheel 53, and the other end thereof passes through theoperating handle 3, and rotatably connected to theoperating handle 3, anelastic member 56 extending and contracting in the axial direction thereof is provided between thetorque wheel 53 and thetorque transmission member 54, one end of thedriving wheel 52 close to thetorque wheel 53 is provided with a circle of firsthelical teeth 522 with consistent oblique direction along the circumferential direction, one end of thetorque wheel 53 is provided with secondhelical teeth 531 engaging with the firsthelical teeth 522 along the circumferential direction thereof, the connectingrod 2 can move axially relative to theouter sleeve 1, so as to drive the telescopicheight measuring component 4 to expand or contract radially.

In the above embodiment, as shown in fig. 1, the direction indicated by the arrow in the figure is the rotation direction of the torsion wheel 53, before the intervertebral space is expanded, the elastic member 56 is in a compressed state, so that the torsion wheel 53 is forced to engage with the first helical teeth 522 and the second helical teeth 531 of the driving wheel 52, when the torsion wheel 53 applies torsion rotation, the driving wheel 52 is driven to rotate, thereby driving the screw 51 and the connecting rod 2 to move linearly, so as to realize the expansion of the telescopic height measuring assembly 4 (i.e. the intervertebral space is expanded), during the expansion, the intervertebral space has a reaction force (i.e. an expansion resistance) on the telescopic height measuring assembly 4, the resistance force gradually increases along with the height of the intervertebral space, when the height increases to a set maximum height, the resistance force is transmitted to the driving wheel 52 and the torsion wheel 53, because the torsion wheel 53 and the driving wheel 52 are tightly connected by the elastic member 56, therefore, if the acting force is greater than the elastic force of the elastic member 56, the acting force is transmitted to the torsion wheel 53 to further compress the elastic member 56, so that the second helical teeth 531 of the torsion wheel 53 and the first helical teeth 522 of the driving wheel 52 generate a relative slipping effect, the torsion is not effectively transmitted any more, that is, an effective maximum value of the torsion transmission is defined, that is, a maximum height for intervertebral distraction (or a height for radial distraction of the telescopic height measuring assembly 4) is defined, the whole design is very ingenious, and the driving wheel 52 and the torsion wheel 53 are connected in a clutch type manner by using an elastic contact driving mode, so that the maximum distraction height is defined, the distraction height of the telescopic height measuring assembly 4 is defined, and accidents caused by the exceeding of the intervertebral distraction height due to misoperation are avoided.

In a preferred embodiment, thetorque transmission member 54 is a rod-shaped member, a through hole is provided at an end of thetorque wheel 53 remote from thenut 55, and an end of thetorque transmission member 54 is inserted into the through hole and axially slidably coupled to thetorque wheel 53.

In the above embodiment, thetorque transmission member 54 has a simple and reasonable shape design, is convenient to assemble, and has more compact connection structure.

Preferably, slidingholes 532 penetrating the side wall of thetorque wheel 53 are symmetrically formed on both side walls of the through hole, the slidingholes 532 extend in the axial direction of thetorque wheel 53, guide pins 541 are vertically formed on both sides of one end of thetorque transmission member 54, and the guide pins 541 respectively penetrate the slidingholes 532 on the corresponding sides in a one-to-one correspondence.

In the above scheme, thetorque transmission member 54 has the advantages that theguide pin 541 and theslide hole 532 are connected in a positioning sliding fit manner, so that thetorque wheel 53 can have an axial sliding space, good torque transmission is ensured, and the design is very reasonable.

In this embodiment, theelastic member 56 is a spring sleeved on one end of thetorque transmission member 54, one end of thetorque transmission member 54 is further provided with apositioning block 542, thepositioning block 542 can slide along thetorque transmission member 54 to adjust the elastic force of the spring, and is fixed to thetorque transmission member 54 through a fixing member after adjustment, one end of the spring extends into the through hole, and two ends of the spring respectively abut against the bottom of the through hole and thepositioning block 542.

In the above embodiment, thetorque transmission member 54 is a spring of the prior art, which is fitted more closely to the through hole and thepositioning block 542, so that the axial movement of thetorque wheel 53 is smoother, and at the same time, the initial elastic force value of the spring can be adjusted by axially moving thepositioning block 542 in a pre-tightening manner, such as: move locatingpiece 542 towardstorsion wheel 53 axial direction and be close to, will make the elasticity increase of spring, after spring elasticity increases, resistance upper limit when telescopicheight finding subassembly 4 struts also can corresponding increase, that is to say the height that struts also can corresponding increase, thereby reach the purpose of adjusting telescopicheight finding subassembly 4 and strut the height, equally, after reaching effectual the biggest height of strutting, continue to apply the torsional force, or the torsional force lasts and increases and can take place relative skidding betweendrive wheel 52 and thetorsion wheel 53.

In this embodiment, the portion of thetorque transmission member 54 penetrating through theoperating handle 3 is provided with an annular protrusion, the corresponding portion inside theoperating handle 3 is provided with an annular recessed area, and the annular protrusion is embedded into the annular recessed area, so as to ensure stable rotational connection between thetorque transmission member 54 and theoperating handle 3.

Preferably, arotary handle 543 is connected to the other end of thetorque transmission member 54, and the torque is conveniently transmitted to thedriving wheel 52 through therotary handle 543.

As a preferred embodiment, as shown in fig. 1, 2, 3 and 4, the telescopic height measuring assembly 4 comprises a first height measuring block 41 and a second height measuring block 42, the first height measuring block 41 and the second height measuring block 42 are symmetrically distributed on two sides of the other end of the connecting rod 2, a driving block 21 is arranged on the end of the other end of the connecting rod 2, a fixing block 22 close to the driving block 21 is further sleeved on the other end of the connecting rod, the fixing block 22 is fixedly connected with the end of the other end of the outer sleeve 1, two sides of one end of the driving block 21 close to the fixing block 22 are respectively provided with a convex guide strip 23, the two guide strips 23 on two sides are symmetrically distributed, two guide strips 23 on the same side are distributed in an eight shape and extend obliquely towards one end of the two guide strips which are far away from each other, a telescopic chute 24 is formed between the two guide strips 23 on the same side, the two sides of the driving block 21 and the fixed block 22 corresponding to the two ends of the telescopic chute 24 are respectively provided with a first sliding surface 211 and a second sliding surface 221 which are parallel to the guide bar 23 on the same side, a guide groove is formed between the first sliding surface 211 and the second sliding surface 221 and the guide bar 23 adjacent thereto, the middle parts of the sides of the first height measuring block 41 and the second height measuring block 42 which are close to each other are respectively provided with a displacement block 6, the two ends of the sides of the two which are close to each other are respectively provided with a guide block 7 which is distributed in a shape of Chinese character 'ba', the displacement block 6 is an isosceles trapezoid block matched with the telescopic chute 24 (the surfaces of the waist edges at the two ends of the isosceles trapezoid block are contacted and jointed with the inner walls at the two ends of the telescopic chute 24), and fitted into the telescopic sliding grooves 24 of the corresponding sides, and the guide blocks 7 are fitted into the guide grooves of the corresponding sides in a one-to-one correspondence.

In the above embodiment, the displacement block 6 and the guide block 7 are always partially located in the corresponding telescopic sliding slot 24 and the guide slot, so that the first height measuring block 41 and the second height measuring block 42 are not easily separated from the other end of the connecting rod 2, in the whole structure, the two guide strips 23 on the same side are distributed in a shape of a Chinese character 'ba' extending outwards from the center (axis) of the connecting rod 2, the first sliding surface 211 and the second sliding surface 221 on the same side are also distributed in a shape of a Chinese character 'ba' extending outwards, matching with the isosceles trapezoid design of the displacement block 6 being attached to the inner side slope surface of the telescopic sliding slot 24 and the attachment design of the guide block 7 and the corresponding first sliding surface 211 and second sliding surface 221, so that the connecting rod 2 extrudes the displacement block 6 to move radially (the displacement blocks 6 on both sides are synchronously far away) through the inclined surface on the inner side of the telescopic sliding slot 24 in the process of driving the driving block 21 moving close to the fixed block 22, therefore, the first height measuring block 41 and the second height measuring block 42 are relatively far away (i.e. are propped open), when the first height measuring block 41 and the second height measuring block 42 are contracted, reverse torsion is applied to the torsion wheel 53, the telescopic height measuring component 4 is very delicate in structural design, and synchronous opposite movement of the first height measuring block 41 and the second height measuring block 42 can be effectively realized.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The utility model provides a take height finding examination mould apparatus of force limiting mechanism which characterized in that: the torsion-limiting linear movement device comprises an outer sleeve (1), a connecting rod (2), an operating handle (3), a telescopic height measuring component (4), a torsion-to-linear movement component and a torsion limiting force applying component, wherein one end of the outer sleeve (1) is connected with the operating handle (3), the connecting rod (2) is sleeved in the outer sleeve (1) and is axially and slidably connected with the outer sleeve (1), one end of the connecting rod (2) extends into the operating handle (3) and is connected with the torsion-to-linear movement component, the torsion limiting force applying component is assembled at the operating handle (3) and is connected and matched with the torsion-to-linear movement component, the torsion limiting force applying component is used for applying torsion to the torsion-to-linear movement component and limiting the maximum output value of the torsion, and the torsion-to-linear movement component is used for converting torsion movement into linear movement, thereby drive connecting rod (2) for outer tube (1) axial is flexible, connecting rod (2) flexible in-process drives telescopic height finding subassembly (4) radially struts or contracts.

2. The height and mold testing instrument with the force limiting mechanism according to claim 1, wherein: the torsion-to-linear movement assembly comprises a screw rod (51) and a driving wheel (52), the screw rod (51) is arranged in the operating handle (3), one end of the screw rod is coaxially connected with one end of the connecting rod (2), the other end of the screw rod is screwed with a nut (55), the nut (55) is coaxially connected and fixed with the driving wheel (52), the driving wheel (52) is rotatably connected with an inner cavity of the operating handle (3), and the torsion limiting force applying assembly is connected and matched with the driving wheel (52) and used for applying torsion to the driving wheel (52).

3. The height and mold testing instrument with the force limiting mechanism according to claim 2, wherein: the coaxial spacing ring (521) that is equipped with of drive wheel (52) surface, operating handle (3) inner chamber be equipped with the annular of spacing ring (521) coaxial setting, spacing ring (521) embedding in the annular.

4. The height and mold measuring instrument with the force limiting mechanism according to claim 2, characterized in that: one end of the screw rod (51) is coaxially connected with one end of the connecting rod (2) through a straight pull connecting piece (57), a pointer (58) which is perpendicular to the connecting rod (2) is arranged on the straight pull connecting piece (57), a transparent window is formed in the position of the pointer (58) corresponding to the operating handle (3), and a scale marking line which is axially arranged on the connecting rod (2) is arranged in the transparent window.

5. The height and mold testing instrument with the force limiting mechanism according to claim 2, wherein: the torque force limiting component comprises a torque wheel (53) and a torque transmission piece (54), the torque wheel (53) is coaxially arranged at one end, far away from the nut (55), of the driving wheel (52), one end of the torque transmission piece (54) is axially and slidably connected with the torque wheel (53), the other end of the torque transmission piece (54) penetrates out of the operating handle (3) and is rotatably connected with the operating handle (3), an elastic piece (56) which extends and retracts along the axial direction of the torque transmission piece (54) is arranged between the torque wheel (53) and the torque transmission piece (54), one end, close to the torque wheel (53), of the driving wheel (52) is circumferentially provided with a circle of first helical teeth (531) with the same oblique direction, one end of the torque wheel (53) is circumferentially provided with a second helical tooth (531) of the first helical meshing teeth (522), and the connecting rod (2) can axially move relative to the outer sleeve (1), thereby driving the telescopic height-measuring component (4) to expand or contract radially.

6. The height and mold testing instrument with the force limiting mechanism according to claim 5, wherein: the torque transmission piece (54) is a rod-shaped component, a through hole is formed in one end, far away from the nut (55), of the torque wheel (53), and one end of the torque transmission piece (54) extends into the through hole and is axially connected with the torque wheel (53) in a sliding mode.

7. The height and mold testing instrument with the force limiting mechanism according to claim 6, wherein: the symmetry is equipped with on the both sides lateral wall of through-hole and runs through slide opening (532) of torque wheel (53) lateral wall, slide opening (532) are followed the axial extension of torque wheel (53), the one end both sides of torque transmission piece (54) are equipped with uide pin (541) respectively perpendicularly, uide pin (541) respectively one-to-one pass correspond the side slide opening (532).

8. The height and mold testing instrument with the force limiting mechanism according to claim 6, wherein: elastic component (56) are located for the cover the spring of torque transmission piece (54) one end, the one end of torque transmission piece (54) is equipped with locating piece (542) along its axial slidable, locating piece (542) can be followed torque transmission piece (54) slide, in order to adjust the elasticity of spring to after adjusting through the mounting with torque transmission piece (54) are fixed, spring one end stretches into in the through-hole, its both ends respectively with the hole bottom of through-hole and locating piece (542) offset.

9. The height and mold testing instrument with the force limiting mechanism according to claim 6, wherein: the other end of the torque transmission piece (54) is connected with a rotary handle (543).

10. The height and mold testing instrument with the force limiting mechanism according to any one of claims 1 to 9, wherein: the telescopic height measuring component (4) comprises a first height measuring block (41) and a second height measuring block (42), the first height measuring block (41) and the second height measuring block (42) are symmetrically distributed on two sides of the other end of the connecting rod (2), a driving block (21) is arranged at the end part of the other end of the connecting rod (2), a fixed block (22) close to the driving block (21) is further sleeved on the other end of the connecting rod, the fixed block (22) is fixedly connected with the end part of the other end of the outer sleeve (1), convex guide strips (23) are respectively arranged on two sides of one end, close to the driving block (21) and the fixed block (22), of the guide strips (23) on two sides are symmetrically distributed, two guide strips (23) located on the same side are distributed in a splayed shape, extend towards one end, which is far away from the two guide strips, a telescopic sliding groove (24) is formed between the two guide strips (23) located on the same side, the parts of the two sides of the driving block (21) and the fixed block (22) corresponding to the two ends of the telescopic chute (24) are respectively provided with a first sliding surface (211) and a second sliding surface (221) which are parallel to the guide strip (23) at the same side, a guide groove is formed between the first sliding surface (211) and the second sliding surface (221) and the guide strip (23) close to the first sliding surface and the second sliding surface respectively, the middle parts of the sides of the first height measuring block (41) and the second height measuring block (42) which are close to each other are respectively provided with a displacement block (6), the two ends of the sides of the first height measuring block and the second height measuring block which are close to each other are respectively provided with a guide block (7) which is distributed in a shape of Chinese character 'ba', the displacement block (6) is an isosceles trapezoid block matched with the telescopic chute (24), and the guide blocks (7) are respectively embedded into the corresponding guide grooves on the corresponding side in a one-to-one correspondence manner.

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