CN218726061U - Static axial compression subsidence test device of fusion cage - Google Patents

Abstract

The utility model discloses a fuse static axial compression settlement test device of ware, including pedestal and the experimental organism of setting at its top, experimental organism test end is connected with the cavity push rod through the universal joint, and the pedestal corresponds the tip with cavity push rod opposite face and all can dismantle and be provided with the binaural board, all is provided with between the binaural board ear wall and supports the spreader, can overturn on supporting the spreader and be provided with the upset and change the arc board, support the spreader and overturn and change and be provided with the dead subassembly of location lock between the arc board, the upset is changed the arc board and has been arranged the mounting groove piece under the surface, the inside dismantlement of mounting groove piece is provided with the test piece. Through unscrewing fixing stud and shifting out the dead spring loop pole of lock from the dead inslot of lock, be convenient for change the arc board upset to the upset, the dead groove of lock sets up with the cooperation of the dead spring loop pole of lock on the locating lever, is convenient for fix a position the experimental position of test piece, carries out quick replacement to the test piece when being convenient for fuse the static axial compression sinking test of ware.

Description

Static axial compression subsidence test device of fusion cage

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to static axial compression settlement test device of fusion cage.

Background

The interbody fusion cage is composed of an interbody fusion cage and accessory screws of the interbody fusion cage, the materials adopt Ti6Al4V titanium alloy, the materials are packaged in a non-sterilization way, and the application range of the product is suitable for the interbody fusion of the spine; in order to measure the subsidence caused by the compression of the intervertebral fusion device of the lumbar vertebra, the thoracic vertebra and the cervical vertebra, an axial compression test method is established, the axial compression subsidence test of the intervertebral fusion device is carried out through a hollow gland simulation motion section between two polyurethane foam test blocks, in order to improve the correctness of the test result, a plurality of groups of polyurethane foam blocks are arranged for the test, and after the static axial compression subsidence test of the fusion device is finished, a new polyurethane foam block is adopted for carrying out the re-measurement, such as the test method expressed by YY/T0960 'spine implant intervertebral fusion device static axial compression subsidence test method'.

For example, chinese patent No. CN215937821U discloses a static compression bending test apparatus for a zero notch fusion system, which includes: the fixture comprises two supports, wherein the first support is provided with a first surface and a second surface, the second support is provided with a third surface and a fourth surface, and the first surface and the third surface are arranged oppositely; the test block comprises a first test block and a second test block and is used for simulating two vertebral bodies to be connected; the first test block and the second test block are respectively fixed on the first surface and the third surface; the zero notch fusion system to be tested is arranged between the first surface and the third surface and is fixedly connected with the first test block and the second test block.

However, the above scheme has the following disadvantages: the first test block and the second test block in the patent document are equivalent to polyurethane foam blocks in a subsidence test, the first test block and the second test block are fixed on a support through corresponding connecting blocks, after a single test is finished, the test blocks can be disassembled only after the connecting blocks are disassembled, finally, new test blocks are installed according to the reverse operation, meanwhile, the height between the first test block and the second test block after installation needs to be measured, the consistency of the test height is guaranteed, and the operation process is dispersive and tedious;

how to design a device, it is the problem that needs to solve at present to carry out quick replacement to polyurethane foam piece when being convenient for carry out the static axial compression settlement test of fuse ware.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fuse static axial compression settlement test device to solve the problem that exists among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a static axial compression subsidence test device for a fusion cage comprises a base frame and a test machine body arranged at the top of the base frame, wherein a test end of the test machine body is connected with a hollow push rod through a universal joint, opposite surfaces of the base frame and the hollow push rod are provided with double lug plates in a detachable mode, supporting cross columns are arranged between two lug walls of the double lug plates, turnover replacement arc plates are arranged on the supporting cross columns in a turnover mode, a positioning locking assembly is arranged between the supporting cross columns and the turnover replacement arc plates, installation groove blocks are arranged on the lower surfaces of the turnover replacement arc plates, and test blocks are detachably arranged in the installation groove blocks;

the positioning locking assembly is used for correspondingly arranging the opposite surfaces of the base frame and the hollow push rod and fixing the upper end surface and the lower end surface of the fusion device body at a fixed distance by the test block.

Preferably, when the hollow push rod is coincident with the Z axis of the fusion device body, the actuator and the force sensor in the test machine body are arranged in a collinear manner, and the hollow push rod is deflected at the force output side of the test machine body through the universal joint and is used for simulating the use environment of the fusion device body deflected between the vertebral bodies.

Preferably, the test blocks in the two mounting groove blocks are both polyurethane foam blocks.

Preferably, the dead subassembly of positioning lock is including setting up the fixing stud who supports the spreader middle section, screw-thread fit cover is equipped with the internal thread cover on the fixing stud, the arc inboard surface of changing in the upset corresponds to the installation groove piece position all is provided with the locating lever, and the locating lever free end is fixed to be set up the internal thread is sheathe in.

Preferably, the top wall of the internal thread sleeve is provided with a fixing screw hole, and a fixing bolt is inserted into the fixing screw hole in a matching manner through internal threads and is used for fixing the internal thread sleeve and the fixing stud.

Preferably, a vertical plate is arranged on the bottom end face of the supporting cross column, a locking hole is formed in the side wall of the vertical plate, a locking spring sleeve rod is inserted into the locking hole, a locking groove is formed in the corresponding face of the positioning rod, and the inner end of the locking spring sleeve rod is inserted into the locking groove under the action of spring force and is locked and fixed to the turnover replacement arc plate.

Compared with the prior art, the beneficial effects of the utility model are that:

fixing stud is unscrewed, the locking spring sleeve rod is moved out from the locking groove, the arc plate is convenient to overturn for overturning, the locking groove and the locking spring sleeve rod are arranged on the positioning rod in a matched mode, the consistency of the height of the intervertebral disc is guaranteed, the test position of the test block is convenient to locate, three mounting groove blocks arranged on the overturning and replacing arc plate are used for preparing the test block to be replaced, the test block only needs to be mounted and dismounted on the mounting groove block which is overturned out in a buckling mode, the test block is convenient to replace when the static axial compression sinking test of the fusion device is carried out, the fusion device body is continuously measured, the waiting time of the fusion device body during the replacement of the test block is saved, and the test efficiency is improved.

Drawings

FIG. 1 is a schematic view of the whole structure of the present invention in a partial cross section;

FIG. 2 is a left side partial cross-sectional schematic view of the binaural panel and flip replacement arc panel of FIG. 1;

fig. 3 is a schematic structural view of the hollow push rod of fig. 1 corresponding to a double-lug plate and a turnover replacement arc plate.

In the figure: 1. a base frame; 2. testing the organism; 3. a double ear plate; 4. supporting the transverse column; 5. turning over and replacing the arc plate; 6. installing a groove block; 7. a test block; 8. a fusion device body; 9. fixing the stud; 10. an internal thread sleeve; 11. positioning a rod; 12. fixing screw holes; 13. fixing the bolt; 14. a vertical plate; 15. a locking hole; 16. locking the spring sleeve rod; 17. a locking groove; 101. a universal joint; 102. a hollow push rod.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

the first embodiment is as follows:

a static axial compression subsidence test device of a fusion cage comprises a base frame 1 and a test machine body 2 arranged at the top of the base frame, the test end of the test machine body 2 is connected with a hollow push rod 102 through a universal joint 101, the corresponding end parts of the opposite surfaces of the base frame 1 and the hollow push rod 102 are provided with a double-lug plate 3 in a detachable way, the double-lug plate 3 on the base frame 1 is fixedly arranged, a supporting transverse column 4 is arranged between the two lug walls of the double-lug plate 3, the supporting transverse column 4 is horizontally and transversely arranged, an overturning replacing arc plate 5 is arranged on the supporting transverse column 4 in a turnover way, the overturning replacing arc plate 5 is of an arc plate structure, a positioning locking component is arranged between the supporting transverse column 4 and the overturning replacing arc plate 5, the lower surface of the overturning replacing arc plate 5 is provided with mounting groove blocks 6, in the embodiment, the mounting groove blocks 6 are three, and test blocks 7 are detachably arranged in the mounting groove blocks 6, the test block 7 and the mounting groove block 6 are fixed by clamping or magic tape bonding, as shown in figure 3, a T-shaped chute is arranged on the front end face of the mounting groove block 6, the T-shaped chute protrudes out of the outer side wall of the mounting groove block 6, so that the test block 7 can be conveniently inserted into the T-shaped chute for pre-fixing, an unshown anti-tripping buckle can be pre-arranged at the end part of the T-shaped chute for quick fixing, 15-grade polyurethane foam meeting the requirement of ASTMF1839 is selected, the linear distance between the undeformed test blocks 7 along the Z-axis direction is the height of the intervertebral disc, the heights of the lumbar vertebra, the thoracic vertebra and the cervical vertebra are respectively 10mm, 6mm and 4mm, a user of the standard should select a proper instrument for testing, an actuator of the intervertebral disc testing machine body 2 is connected with a hollow push rod 102 through a ball-socket joint or a universal joint 101 with the lowest possible friction coefficient, a fusion cage body 8 is fixedly contacted between the base frame 1 and a test block 7 correspondingly arranged on the opposite surface of the hollow push rod 102, the test block 7 is tightly matched with the fusion cage body 8 through a surface matched with the geometric shape of the test block, and the matching mode of the test block 7 is similar to that of an intervertebral fusion cage and a vertebral body end plate;

the height of the fusion cage body 8 of cervical vertebra, thoracic vertebra and lumbar vertebra corresponding to the test block 7 is respectively 40mm, 60mm and 70mm, and the positioning locking component is used for fixing the upper end face and the lower end face of the fusion cage body 8 at a fixed distance by the test block 7 correspondingly arranged on the opposite surfaces of the base frame 1 and the hollow push rod 102.

Example two:

further, on the basis of the first embodiment, the two test blocks 7 are polyurethane foam blocks, the two test blocks 7 are oppositely arranged and used for simulating the fixed environment of the fusion device body 8 by the cone, when the hollow push rod 102 coincides with the Z axis of the fusion device body 8, the actuator and the force sensor in the test machine body 2 are arranged in a collinear manner, and the force output side of the test machine body 2 enables the hollow push rod 102 to deflect through the universal joint 101 and is used for simulating the use environment of the fusion device body 8 deflecting between the cones.

Example three:

further explaining on the basis of the first embodiment, the positioning locking assembly comprises a fixing stud 9 arranged at the middle section of the support cross post 4, an internal thread sleeve 10 is sleeved on the fixing stud 9 in a threaded fit manner, the turning center of the turning replacement arc plate 5 is overlapped by the center of the internal thread sleeve 10, the inner surface of the turning replacement arc plate 5 corresponding to the mounting groove block 6 is clamped or fixed with a positioning rod 11 in a threaded manner, the free end of the positioning rod 11 is fixedly arranged on the outer surface of the internal thread sleeve 10, and when the test block 7 on the mounting groove block 6 is opposite and used for fixing the fusion device body 8, the Z axis of the positioning rod 11 corresponding to the mounting groove block 6 is overlapped with the central axis of the hollow push rod 102, so that a good positioning effect is achieved;

a fixing screw hole 12 is formed in the top wall of the internal thread sleeve 10, a fixing bolt 13 is inserted into the fixing screw hole 12 in a matched mode through internal threads and used for fixing the internal thread sleeve 10 and the fixing stud 9, and when the turnover replacement arc plate 5 is in a fixed state, the internal thread sleeve 10 is prevented from turning over on the fixing stud 9;

support 4 bottom face welding of spreader has riser 14, is equipped with locking hole 15 on the riser 14 lateral wall, and locking hole 15 is interior to be inserted and to have locked spring loop bar 16, is equipped with dead groove 17 of lock on the locating lever 11 corresponding face, and the dead spring loop bar 16 of lock has the spring thrust towards dead groove 17 direction of lock, and the dead spring loop bar 16 of lock inner inserts under the spring force effect to dead groove 17 of lock in and to change arc board 5 and lock and die fixedly to overturning to change arc board 5 and carry out the secondary to the upset and fix.

The working principle is as follows: according to the implant inserting method suggested by the manufacturer, firstly, a test block 7 is preset and fixed in a mounting groove block 6, a base frame 1 and an overturning replacement arc plate 5 corresponding to a hollow push rod 102 are oppositely arranged in a mirror image mode, a fusion device body 8 is arranged in the middle of the test block 7 corresponding to the opposite overturning replacement arc plate 5, the load of the test device body 2 is applied to the fusion device body 8 at the speed of 0.1mm/s, a sinking test system simulating two springs connected in series is obtained from YY/T0960, the relation between the rigidity of the fusion device body 8 and the rigidity of the test block 7 can be obtained, after the test is finished, the test device body 2 is adjusted to enable the hollow push rod 102 to be in a vertical placement state of an initial position, at the moment, the overturning replacement arc plate 5 corresponding to the base frame 1 and the hollow push rod 102 is in a symmetrical arrangement state as shown in figure 1 or figure 2, the hollow push rod 102 is moved upwards by three centimeters, unscrewing fixing studs 9 corresponding to the upper and lower supporting transverse columns 4, moving out a locking spring sleeve rod 16 from a locking groove 17, overturning a turnover replacement arc plate 5 through an internal thread sleeve 10 to enable a tested test block 7 to be overturned outwards until the tested test block 7 is completely arranged oppositely, loosening the locking spring sleeve rod 16 and inserting the same into the locking groove 17 on an overturned positioning rod 11 for fixing, testing the static axial compression subsidence of the fusion device body 8 according to the method expressed in YY/T0960 static axial compression subsidence test method of the spinal implant interbody fusion device, taking out the fusion device body 8 which is overturned out of the test block 7, then placing the same on the test block 7 to be tested at the same position, screwing the fixing studs 9 to secondarily fix the internal thread sleeve 10, moving three hollow push rods 102 downwards and then carrying out the same test operation, meanwhile, the test block 7 which is turned out to the outside for use is taken out and is placed in a new test block 7 again, so that the test block 7 can be used next time, the fusion device static axial compression sinking test can be conveniently carried out, the fusion device body 8 can be continuously measured, the operation process is simple, the waiting time of the fusion device body 8 during the replacement of the test block 7 is saved, and the test efficiency is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a fuse static axial compression settlement test device of ware, includes base frame (1) and sets up experimental organism (2) at its top, experimental organism (2) test end is connected with cavity push rod (102), its characterized in that through universal joint (101): the end parts of the corresponding surfaces of the base frame (1) and the hollow push rod (102) are detachably provided with double lug plates (3), supporting cross columns (4) are arranged between the two lug walls of the double lug plates (3), the supporting cross columns (4) can be overturned to be provided with overturning replacement arc plates (5), positioning locking assemblies are arranged between the supporting cross columns (4) and the overturning replacement arc plates (5), installation groove blocks (6) are arranged on the lower surfaces of the overturning replacement arc plates (5), and test blocks (7) are detachably arranged in the installation groove blocks (6);

the positioning locking assembly is used for correspondingly arranging the opposite surfaces of the base frame (1) and the hollow push rod (102) and fixing the upper end face and the lower end face of the fusion device body (8) at a fixed distance by the test block (7).

2. The cage static axial compression subsidence test device of claim 1, wherein: when the hollow push rod (102) is coincident with the Z axis of the fusion device body (8), the actuator and the force sensor in the test machine body (2) are arranged in a collinear manner, and the hollow push rod (102) is deflected on the force output side of the test machine body (2) through the universal joint (101) and is used for simulating the use environment of the fusion device body (8) deflected between vertebral bodies.

3. The cage static axial compression subsidence test device of claim 1, wherein: the test blocks (7) in the two mounting groove blocks (6) are polyurethane foam blocks.

4. The cage static axial compression subsidence test device of claim 1, wherein: the dead subassembly of positioning lock is including setting up fixing stud (9) of support spreader (4) middle section, screw-thread fit cover are equipped with internal thread cover (10) on fixing stud (9), arc board (5) internal surface is changed in the upset corresponding to mounting groove piece (6) position all is provided with locating lever (11), and locating lever (11) free end is fixed to be set up on internal thread cover (10).

5. The cage static axial compression subsidence test device of claim 4, wherein: the top wall of the internal thread sleeve (10) is provided with a fixing screw hole (12), and a fixing bolt (13) is inserted into the fixing screw hole (12) in a matching manner and is used for fixing the internal thread sleeve (10) and the fixing stud (9).

6. The cage static axial compression subsidence test device of claim 4, wherein: support spreader (4) bottom face and be provided with riser (14), be equipped with locking hole (15) on riser (14) lateral wall, locking hole (15) interpolation is equipped with dead spring sleeve pole (16) of lock, be equipped with dead groove of lock (17) on locating lever (11) corresponding face, dead spring sleeve pole of lock (16) the inner insert under the spring force effect to dead groove of lock (17) in and right it is dead fixed to lock to overturn change arc board (5).

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