CN116020746A

Movatterモバイル変換

Info

Publication number: CN116020746A
Application number: CN202211572141.1A
Authority: CN
Inventors: 熊忠廷; 熊丹
Original assignee: Wuxi Xingbaili Machinery Equipment Co ltd
Current assignee: Wuxi Xingbaili Machinery Equipment Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-28
Anticipated expiration: 2042-12-08
Also published as: CN116020746B

Abstract

The invention provides a specific gravity concentrator with high seed concentration efficiency, which belongs to the technical field of seed screening and comprises: a specific gravity concentrator; one end of a supporting strip is arranged on the front surface of the specific gravity fine separator, and the circumferential surface of the distribution shell is connected with the other end of the supporting strip; the distribution lining shell is arranged in the distribution shell in a changing way, and the outer circumferential surface of the columnar section of the distribution lining shell is rotatably connected with the columnar section of the distribution shell. The invention solves the problem that seeds can accumulate in the delivery shell in the delivery stage and then flow is blocked in the delivery shell, and the selection efficiency of the seeds is low because a hand holding tool is usually conducted.

Description

Seed concentration efficient proportion concentrator

Technical Field

The invention belongs to the technical field of seed screening, and particularly relates to a specific gravity concentrator with high seed concentration efficiency.

Background

Seeds are the reproductive system of seed plants and play an important role in continuing species. The seeds are closely related to human life, besides grains, oil and cotton which are necessary for daily life, some seasonings and beverages come from the seeds, plants, big trees and flowers and plants are also bred from the seeds, and a plurality of the seeds can be eaten and are delicious dishes on a dining table, but the seeds initially contain stones, light impurities, small impurities, big impurities and mildewed grains which need to be screened out, and a specific gravity fine separator is needed.

During the dispensing of seeds into the gravity concentrator, the seeds may accumulate in the dispensing housing during the dispensing phase and then clog circulation in the dispensing housing, which typically requires manual holding of the tool to be turned on, resulting in less efficient concentration of the seeds, thereby providing a high seed concentration efficiency gravity concentrator.

Disclosure of Invention

The invention provides a specific gravity separator with high seed separation efficiency, which aims to solve the problem that seeds can accumulate in a distribution shell in a distribution stage and then flow in the distribution shell is blocked, and then a hand holding tool is usually required to be conducted, so that the seed separation efficiency is low.

The invention provides a specific gravity concentrator with high seed concentration efficiency, which comprises:

a specific gravity concentrator;

one end of a supporting strip is arranged on the front surface of the specific gravity fine separator, and the circumferential surface of the distribution shell is connected with the other end of the supporting strip;

the distribution lining is arranged in the distribution shell in a changing way, and the outer peripheral surface of the columnar section of the distribution lining is rotationally connected with the columnar section of the distribution shell;

the first disc spring is arranged between the distribution shell and the distribution inner shell and used for supporting the distribution inner shell to form a space between the distribution inner shell and the distribution inner shell;

the inner peripheral surface of the columnar section of the distribution inner shell is provided with a plurality of disturbance strips;

further, a winding type ditch is arranged on the inner peripheral surface of the columnar section of the distribution shell from top to bottom, a winding type change strip is arranged on the outer peripheral surface of the columnar section of the distribution shell, and the winding type change strip is matched with the ditch from top to bottom.

Further, an expansion ring is arranged on the side of the head of the distribution inner shell, and the expansion ring is covered on the head of the distribution inner shell.

Further, a first annular groove is arranged at the head of the distribution shell, a changing ring is arranged in the first annular groove in a changing mode, the head of the changing ring is fixedly connected with a first disc spring, and the head of the first disc spring is fixedly connected with the tail of the expansion ring.

Further, a number of the turbulence bars are of curved configuration.

Further, the method further comprises the following steps:

the annular changing assembly is fixedly connected to the peripheral surface of the expansion ring by taking the central line of the expansion ring as the center;

the outer peripheral surface of the distribution shell is fixedly connected with a plurality of bearing tables, the head of each bearing table is fixedly connected with the electric cylinder, the travel rod of the electric cylinder is fixedly connected with a changing assembly, and the head change of the changing assembly is inserted into a ring-shaped channel II of the ring-shaped changing assembly;

the change subassembly includes interior section of thick bamboo and urceolus, the urceolus hoops the outer peripheral face of connecing in the section of thick bamboo, interior section of thick bamboo and urceolus change connection, the afterbody of urceolus is fixed with the stroke pole of electric jar, the head change of interior section of thick bamboo is pegged graft in the annular ditch way second of annular change subassembly.

Further, the ring-shaped variation assembly includes:

the connecting strips are arranged on the outer peripheral surface of the expansion ring at the same intervals;

the connecting rings B are fixedly connected to the outer peripheral surfaces of the connecting strips;

and the connecting ring C is fixedly connected to the connecting strip through a right-angle folded plate, the connecting ring C coincides with the central line of the connecting ring B, and the connecting ring B and the connecting ring C form a ring-shaped channel II.

Further, the right-angle folded plate comprises a supporting table and a connecting table, one end of the supporting table is fixedly connected to the wall surface of the connecting strip, the other end of the supporting table is fixedly connected to the head of the connecting table, and the tail of the connecting table is fixedly connected to the head of the connecting ring C.

Further, the head of the changing component is fixedly connected with a displacement column, the heads of the connecting ring B and the connecting ring C are provided with auxiliary channels, spheres are arranged in the auxiliary channels in a changing mode, and the tail of the displacement column is attached to the spheres.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial technical effects:

the invention achieves the purpose of rotating the bearing table during the period of displacement of the delivery lining towards the tail part, thereby pulling the disturbance bar to rotate, the rotation of the disturbance bar can disturb the seeds in the columnar section of the delivery lining, the accumulated seeds are dispersed and then fall on the gravity concentration machine, the purpose of uninterrupted concentration is achieved, during the period of slow discharge of gravity in the delivery lining and reduced, the delivery lining is displaced towards the head part due to the function of the disc spring I, and the disturbance bar is rotated during the period, thereby achieving the purpose of avoiding accumulation and blockage during the period of continuous delivery or continuous discharge reduction of the seeds.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of a dispensing shell structure of the present invention;

FIG. 3 is a schematic cross-sectional view of a dispensing shell according to the present invention;

FIG. 4 is a schematic overall cross-sectional structure of the present invention;

FIG. 5 is an enlarged schematic view of the structure shown at B in FIG. 4;

FIG. 6 is a schematic view of a ring-like varying assembly according to the present invention;

FIG. 7 is a schematic view of the bottom surface of the displacement table according to the present invention;

FIG. 8 is a schematic diagram of a cylinder structure according to the present invention;

FIG. 9 is a schematic view of the structure of the connecting rod and the assembly chamber of the present invention;

FIG. 10 is a schematic view of a disc spring C according to the present invention;

fig. 11 is a schematic view of the structure of the joint part of the present invention.

Reference numerals: 1. a displacement table; 2. a specific gravity concentrator; 3. a supporting strip; 4. a dispensing shell; 42. a variable coil; 43. a ditch path; 5. dispensing the inner shell; 52. an expansion ring; 53. a change bar; 6. a first disc spring; 7. a disturbance bar; 8. a support table; 9. an electric cylinder; 10. a change component; 11. a tie bar; 12. a coupling ring B; 21. a coupling ring C; 22. a support stand; 23. a coupling table; 24. a displacement column; 132. an assembly chamber; 1322. an oil cylinder; 1323. a supporting piece; 133. an assembly chamber; 1332. an assembly chamber C; 13322. a magnet C; 1333. an assembly chamber D; 14. a displacement section; 142. an assembly table; 1422. a magnet D; 143. a connecting rod; 1432. a connecting rod C; 14322. a placement port; 14323. a disc spring C; 1433. a connecting rod D; 144. a walking wheel; 145. a connecting piece C; 146. a disc spring D; 147. a connecting piece D; 15. a coupling part; 152. rotating the rod; 153. a limit bar; 1532. a limit opening; 154. a stabilizing rod; 155. a stabilizing table C; 156. a stabilizing table D; 157. a limit rod; 16. a placement cavity; 162. a cover plate; 163. and lifting the frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present invention provides a specific gravity concentrator with high seed concentration efficiency, comprising: aspecific gravity separator 2; one end of a supporting strip 3 is arranged on the front surface of thegravity concentration machine 2, and the peripheral surface of thedistribution shell 4 is connected with the other end of the supporting strip 3;

the distribution inner shell 5 is arranged in thedistribution shell 4 in a variable way, and the outer circumferential surface of the columnar section of the distribution inner shell 5 is rotatably connected with the columnar section of thedistribution shell 4; thefirst disc spring 6 is arranged between thedistribution shell 4 and the distribution inner shell 5, and thefirst disc spring 6 is used for supporting the distribution inner shell 5 to enable the distribution inner shell 5 to form a space with thedistribution shell 4; anddisturbance strips 7, wherein a plurality of disturbance strips 7 are arranged on the inner peripheral surface of the columnar section of the distribution inner shell 5.

The cylindrical section of thedistribution shell 4 is provided with a top-down windingtype ditch 43, the outer circumferential surface of the cylindrical section of the distribution shell 5 is provided with a windingtype change bar 53, the windingtype change bar 53 is matched with the top-down windingtype ditch 43, the top-down windingtype ditch 43 is reserved to be arch-shaped in section, mechanical oil is filled in the top-down windingtype ditch 43, and the displacement obstruction between the wall surfaces is reduced.

Anexpansion ring 52 is arranged on the side of the head of the distribution inner shell 5, theexpansion ring 52 is covered on the head of thedistribution shell 4, theexpansion ring 52 can prevent impurities from drifting into the space between thedistribution shell 4 and the distribution inner shell 5, and a filter layer woven by silk threads can be arranged between thedistribution shell 4 and the distribution inner shell 5.

The head of thedistribution shell 4 is provided with a circular groove I, achange ring 42 is arranged in the circular groove I in a changing way, the head of thechange ring 42 is fixedly connected with a disc spring I6, the head of the disc spring I6 is fixedly connected with the tail of theexpansion ring 52, the circular groove I is filled with mechanical oil, thechange ring 42 can rotate in the circular groove I, thereby ensuring smooth rotation of the distribution inner shell 5 and reducing obstruction during rotation of the distribution inner shell 5.

The disturbance strips 7 are of curved configuration.

Also comprises:

a ring-shaped changing member fixedly coupled to the circumferential surface of theextension ring 52 centering on the center line of theextension ring 52;

the outer peripheral surface of thedistribution shell 4 is fixedly connected with a plurality of bearing tables 8, the heads of the bearing tables 8 are fixedly connected with the electric cylinders 9, the travel rods of the electric cylinders 9 are fixedly connected with a changingassembly 10, and the heads of the changingassembly 10 are in changing connection with a ring-shaped groove II of the ring-shaped changing assembly;

the changingassembly 10 comprises an inner cylinder and an outer cylinder, the outer cylinder is hooped on the outer circumferential surface of the inner cylinder, the inner cylinder is connected with the outer cylinder in a changing way, the tail part of the outer cylinder is fixedly connected with a travel rod of the electric cylinder 9, and the head part of the inner cylinder is inserted in a ring-shaped groove II of the ring-shaped changing assembly in a changing way.

The ring-shaped variation assembly comprises: a plurality of coupling bars 11, the plurality of coupling bars 11 being installed at the outer circumferential surface of theextension ring 52 at the same interval; the connecting rings B12 are fixedly connected to the outer peripheral surfaces of the connectingstrips 11; and the connecting ring C21 is fixedly connected to the connectingstrip 11 through a right-angle folded plate, the connecting ring C21 is overlapped with the central line of the connecting ring B12, and the connecting ring B12 and the connecting ring C21 form a ring-shaped channel II.

The right-angle folded plate comprises a supporting table 22 and a connecting table 23, one end of the supporting table 22 is fixedly connected with the wall surface of the connectingstrip 11, the other end of the supporting table 22 is fixedly connected with the head of the connecting table 23, and the tail of the connecting table 23 is fixedly connected with the head of the connecting ring C21.

The head of the changingcomponent 10 is fixedly connected with thedisplacement column 24, the heads of the connecting ring B12 and the connecting ring C21 are respectively provided with an auxiliary ditch, a sphere is arranged in the auxiliary ditch in a changing way, the tail of thedisplacement column 24 is attached to the sphere, and the obstruction during the changing period of thedisplacement column 24 can be reduced.

The gravity concentrator further comprises a displacement module for the displacement of thegravity concentrator 2, the displacement module comprises a displacement table 1, the tail of thegravity concentrator 2 is fixedly connected with the head of the displacement table 1, 4

assembly cavities

132,4 are reserved at the tail of the displacement table 1, and 4 crutch areas are respectively arranged at the tail of the displacement table 1.

Theoil cylinders 1322 are arranged in theassembly cavities 132, theoil cylinders 1322 are fixedly connected in theassembly cavities 132, the supportingsheets 1323 are fixedly connected on the travel bars of theoil cylinders 1322, and the supportingsheets 1323 are arranged in theassembly cavities 132.

The central areas of the 4 side walls of the displacement table 1 are reserved withassembly chambers 133, and thedisplacement parts 14 are arranged in theassembly chambers 133. The travelingwheel 144 includes an assembling chamber C1332 and an assembling chamber D1333, the assembling chamber C1332 and the assembling chamber D1333 are communicated, and the assembling chamber D1333 is located at the tail of the assembling chamber C1332.

Thedisplacement portion 14 includes a mounting table 142, acoupling rod 143, and a travellingwheel 144, thecoupling rod 143 includes a coupling rod C1432 and a coupling rod D1433, the coupling rod C1432 and the coupling rod D1433 are both quadrangular, and one end of the coupling rod C1432 is fixedly connected to the mounting table 142.

One end of the connecting rod C1432, which is farther from the assembly table 142, is reserved with aplacing opening 14322, one end of the connecting rod D1433 is embedded into theplacing opening 14322, a disc spring C14323 is arranged in theplacing opening 14322, one end of the disc spring C14323 is fixedly connected with the connecting rod D1433, the other end of the disc spring C14323 is fixedly connected with the inside of the connecting rod D1433, which is farther from the connecting rod D1433, with the placingopening 14322, and the travellingwheel 144 is arranged at one end of the connecting rod D1433, which is farther from the connecting rod C1432.

The assembly table 142 is engaged with the assembly chamber C1332, and the connecting rod C1432 is inserted into the assembly chamber C1332 through the assembly chamber D1333, so that the side wall of the connecting rod C1432 is aligned with the side wall of the stay 3. When thegravity concentrator 2 is required to be displaced, theoil cylinder 1322 is operated, the supportingpiece 1323 is attached to the cement ground, the tail part of the displacement table 1 is separated from the cement ground, the assembly table 142 is embedded into the assembly chamber C1332 when the displacement table is lifted to a preset orientation, the connecting rod C1432 penetrates through the assembly chamber D1333, theoil cylinder 1322 is reset, the travellingwheel 144 is attached to the cement ground, and the travellingwheel 144 is attached to the cement ground, so that thegravity concentrator 2 is pulled to displace.

The opposite side walls of the connecting rod D1433 are fixedly connected with the connecting pieces C145, each connecting piece C145 is fixedly connected with the disc springs D146, and one end of each disc spring D146, which is farther from the connecting piece C145, is fixedly connected with the connecting piece D147. After the coupling rod C1432 is engaged into the fitting chamber D1333, the coupling rod D1433 is pushed against the rear of the displacement table 1 under the function of the disc spring D146. The disc spring D146 has the function of vibration resistance when the tractiongravity concentration machine 2 is inserted in a displacement way, and the tail part of the displacement table 1 is nailed by the connecting piece D147, so that the connecting rod C1432 can be prevented from being disassembled from the assembling chamber D1333.

The mounting chamber C1332 is fixedly connected to the magnet C13322 in a position further from the side wall of the displacement table 1, and the magnet D1422 is fixedly connected to the side of the mounting table 142 closer to the magnet C13322, and the magnet D1422 and the magnet C13322 are firmly constrained to each other.

The dispensing liner 5 is mounted on the sidewall of the displacement table 1, and the dispensing liner 5 prevents the mounting table 142 from being disassembled from the mounting chamber C1332. The dispensing inner shell 5 comprises arotating rod 152, a connectingrod 143 and a stabilizingrod 154, wherein therotating rod 152 is positioned on one side of the assembling chamber C1332, the stabilizingrod 154 is positioned on the other side of the assembling chamber C1332, one end of a limitingstrip 153 is connected with therotating rod 152 in a rotating way, one end of the limitingstrip 153, which is farther from therotating rod 152, is provided with a limitingopening 1532, and the limitingopening 1532 is in scarf joint with the stabilizingrod 154.

After the assembly table 142 is inserted into the assembly chamber C1332, thelimit bar 153 is rotated, so that thelimit opening 1532 of thelimit bar 153 is engaged with the fixingbar 154, and the assembly table 142 is prevented from being disassembled from the assembly chamber C1332.

Theplacement chamber 16 is reserved on the front surface of the displacement table 1, acover plate 162 is provided on the side of theplacement chamber 16 farther from the middle of the displacement table 1, alifting frame 163 is provided on the surface of thecover plate 162, and thedisplacement section 14 is held in theplacement chamber 16 without using thedisplacement section 14.

The displacement table 1 is attached to the cement during the period when thegravity concentrator 2 does not need to be displaced, and thecylinder 1322 drives the supportingpiece 1323 to be displaced toward the tail during the period when thegravity concentrator 2 needs to be displaced, and the supportingpiece 1323 lifts the displacement table 1.

Then, the assembling table 142 is embedded into the assembling chamber C1332, so that the magnet C13322 and the magnet D1422 are restrained and fixed to each other, the limitingstrip 153 is rotated, the limitingopening 1532 on the limitingstrip 153 is embedded into the stabilizingrod 154, then thecylinder 1322 pulls the supportingpiece 1323 to reset, the supportingpiece 1323 returns to the assemblingcavity 132, and at the moment, the travellingwheel 144 is attached to the cement ground, so that the displacement of the specific gravityfine separator 2 is pulled.

After thegravity concentrator 2 is displaced to a preset orientation, theoil cylinder 1322 pulls the supportingpiece 1323 to fall, the supportingpiece 1323 has a function of supporting the displacement table 1, then thedisplacement portion 14 is detached, and thedisplacement portion 14 is taken into theplacement cavity 16.

The connectingportion 15 comprises a fixing table C155, a fixing table D156, and a limitingrod 157, wherein the fixing table C155 is fixedly connected with the sidewall of the displacement table 1, the fixing table D156 is fixedly connected with the assembly table 142, the fixing table D156 is positioned at the tail of the fixing table C155, and the limitingrod 157 is embedded with the fixing table D156 through the fixing table C155, so that the fixing table C155 and the fixing table D156 are stably connected to prevent the assembly table 142 from being disassembled from the assembly chamber C1332.

The implementation mode specifically comprises the following steps: during the delivery of seeds to thegravity concentrator 2 through the dispensingshell 4, the dispensing shell 5 can be pulled to displace toward the head or the tail through the electric cylinder 9 during the period in which the blocking cannot be avoided through the pressing impulse of the seeds themselves, the displacement toward the head or the tail of the seeds can still be achieved through the pressing of the components of the seeds themselves on the dispensing shell 5, and the shortening can be achieved through the provided varyingassembly 10 during the displacement of the dispensing shell 5 toward the tail, thereby not impeding the operation of the electric cylinder 9.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A specific gravity concentrator with high seed concentration efficiency, comprising:

the gravity concentration machine (2) is characterized in that one end of a supporting strip (3) is arranged on the front surface of the gravity concentration machine (2), and the peripheral surface of the distribution shell (4) is connected with the other end of the supporting strip (3);

the distribution inner shell (5) is arranged in the distribution shell (4) in a changing way, and the outer circumferential surface of the columnar section of the distribution inner shell (5) is rotationally connected with the columnar section of the distribution shell (4);

the first disc spring (6) is arranged between the distribution shell (4) and the distribution inner shell (5), and the first disc spring (6) is used for supporting the distribution inner shell (5) to enable the distribution inner shell (5) to form a space with the distribution shell (4);

and disturbance strips (7), wherein a plurality of disturbance strips (7) are arranged on the inner peripheral surface of the columnar section of the distribution inner shell (5).

2. The seed-concentrating efficient gravity concentrator of claim 1, wherein: the inner peripheral surface of the cylindrical section of the distribution shell (4) is provided with a winding channel (43) from top to bottom, the outer peripheral surface of the cylindrical section of the distribution inner shell (5) is provided with a winding change strip (53), and the winding change strip (53) is matched with the winding channel (43) from top to bottom.

3. The seed-concentrating efficient gravity concentrator of claim 1, wherein: an expansion ring (52) is arranged on the side of the head of the distribution inner shell (5), and the expansion ring (52) is covered on the head of the distribution shell (4).

4. A seed-concentrating efficient gravity concentrator according to claim 3, wherein: the head of the distribution shell (4) is provided with a circular groove I, a changing ring (42) is arranged in the circular groove I in a changing mode, the head of the changing ring (42) is fixedly connected with a disc spring I (6), and the head of the disc spring I (6) is fixedly connected with the tail of the expansion ring (52).

5. The seed-concentrating efficient gravity concentrator of claim 1, wherein: a number of said turbulence bars (7) are of curved configuration.

6. The seed-concentrating efficient gravity concentrator according to claim 3 or 4, further comprising:

a ring-shaped changing assembly fixedly connected to the peripheral surface of the expansion ring (52) with the center line of the expansion ring (52) as the center;

the outer peripheral surface of the distribution shell (4) is fixedly connected with a plurality of bearing tables (8), the heads of the bearing tables (8) are fixedly connected with the electric cylinders (9), the travel rods of the electric cylinders (9) are fixedly connected with a changing assembly (10), and the head change of the changing assembly (10) is inserted into a ring-shaped groove II of the ring-shaped changing assembly;

the change assembly (10) comprises an inner cylinder and an outer cylinder, the outer cylinder is hooped on the outer circumferential surface of the inner cylinder, the inner cylinder is in change connection with the outer cylinder, the tail part of the outer cylinder is fixedly connected with a travel rod of the electric cylinder (9), and the head part of the inner cylinder is in change insertion connection with a ring-shaped channel II of the ring-shaped change assembly.

7. The seed-concentrating efficient gravity concentrator according to claim 6, wherein: the ring-shaped variation assembly comprises:

a plurality of connecting strips (11), wherein the connecting strips (11) are arranged on the outer peripheral surface of the expansion ring (52) at the same intervals;

a coupling ring B (12), wherein the coupling ring B (12) is fixedly connected to the peripheral surfaces of the plurality of coupling strips (11);

the connecting ring C (21), the connecting ring C (21) is fixedly connected to the connecting strip (11) through the right-angle folded plate, the connecting ring C (21) coincides with the central line of the connecting ring B (12), and the connecting ring B (12) and the connecting ring C (21) form a ring-shaped ditch II.

8. The seed-concentrating machine according to claim 7, wherein the right-angle folded plate comprises a supporting table (22) and a connecting table (23), one end of the supporting table (22) is fixedly connected to the wall surface of the connecting strip (11), the other end of the supporting table (22) is fixedly connected to the head of the connecting table (23), and the tail of the connecting table (23) is fixedly connected to the head of the connecting ring C (21).

9. The specific gravity concentrator with high seed concentration efficiency according to claim 7, wherein the head of the changing component (10) is fixedly connected with a displacement column (24), the heads of the connecting ring B (12) and the connecting ring C (21) are respectively provided with an auxiliary ditch, a sphere is arranged in the auxiliary ditch in a changing way, and the tail of the displacement column (24) is attached to the sphere.