CN217006822U - Fretting corrosion device for plate nail - Google Patents

Abstract

The utility model provides a plate nail fretting corrosion device which comprises a support, a test board, a reciprocating driving assembly and a bone plate, wherein the test board is arranged on the support, reciprocating translation executing components of the reciprocating driving assembly are positioned on the test board, two ends of the bone plate are respectively provided with a bone nail, the bone nails are provided with plastic sleeves, the plastic sleeve on one bone nail is connected with the test board, and the plastic sleeve on the other bone nail is connected with the executing component of the reciprocating driving assembly. The bone screw of hone lamella one end is driven through reciprocating drive assembly and moves slightly, and the hone lamella other end is as fixed connection end, and fixed connection end also can produce the fine motion when one end fine motion, and then realizes the wearing and tearing test between hone lamella and the bone screw, and reciprocating drive assembly can carry out the concurrent test to two independent hone lamella for two effect drive disk subassemblies, and then has guaranteed efficiency of software testing.

Description

Fretting corrosion device for plate nail

Technical Field

The utility model relates to a test of a medical surgical metal implant, in particular to a plate nail fretting corrosion device.

Background

An orthopedic implant instrument is an important supporting technology in orthopedics, is used for solving the problem of pathological change or damaged orthopedics through the orthopedic implant instrument, can help a patient to recover normal motion, and improves the life quality of the patient. Has great significance for human health engineering and has great potential market value. The frictional wear performance is an important parameter index in the orthopedic implantation instrument technology, and directly influences the reliability and long-term stability of the orthopedic implantation instrument.

Publication No. CN209102553U provides a device for testing bone nails and fretting wear of bone nails, which is a prior art technique for wear testing between bone nails and bone. Publication No. CN105891035B provides a friction and wear testing device for orthopedic implant instruments, and the prior art tests the wear resistance of a single orthopedic intervention metal instrument. Further, the two prior art techniques do not address the wear between the bone plate and the bone screw at the point of attachment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a plate nail fretting corrosion device to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

a plate nail fretting corrosion device comprising a support, a test table, a reciprocating drive assembly, and a bone plate, the test table disposed on the support, wherein:

the reciprocating translation execution component of the reciprocating driving component is positioned on the test board, two ends of the bone lamella are respectively provided with a bone nail, the bone nails are provided with plastic sleeves, the plastic sleeve on one bone nail is connected with the test board, and the plastic sleeve on the other bone nail is connected with the execution component of the reciprocating driving component.

Preferably, be equipped with the slot guide slot on the testboard, be equipped with screw thread portion on the plastics sleeve of being connected with the testboard and with screw thread portion complex nut, wherein screw thread portion runs through the slot guide slot and the bottom of screw thread portion supports the testboard, and the nut laminating is on the testboard.

Preferably, two of said test stations are arranged on either side of the support, and the number of bone plates is the same as the test stations and there is a one-to-one correspondence between them.

Preferably, the reciprocating driving assembly consists of a cam, a linear bearing and a push rod, the cam is rotatably mounted on the support and located between the two test tables, the test tables are provided with the linear bearing, the push rod is arranged in the linear bearing, one end of the push rod faces the cam, when a protruding part of the cam is in contact with the push rod, the push rod can be pushed to translate, and the other end of the push rod is connected with the plastic sleeve on the bone nail.

Preferably, the cam is a regular pentagon.

Preferably, a spring is arranged between the push rod and the test bench.

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

the reciprocating driving component drives the bone screw at one end of the bone lamella to slightly move, the other end of the bone lamella is used as a fixed connecting end, the fixed connecting end can also generate slight movement when one end slightly moves, so that the abrasion test between the bone lamella and the bone screw is realized, the reciprocating driving component is a double-acting driving component and can simultaneously test two independent bone lamellas, and the test efficiency is further ensured.

Drawings

FIG. 1 is a three-dimensional schematic of the overall structure of the present invention;

FIG. 2 is a front view of the overall structure of the present invention;

FIG. 3 is a schematic view of portion A of FIG. 2;

FIG. 4 is a three-dimensional schematic of the wear test of the present invention.

In the figure: 1 bracket, 2 test table, 4 bone plate, 5 beaker, 31 cam, 32 linear bearing, 33 push rod, 41 plastic sleeve, 42 nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

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

a plate nail fretting corrosion device comprises a bracket 1, a test bench 2, a reciprocating drive assembly and a bone plate 4, wherein the test bench 2 is arranged on the bracket 1, and the plate nail fretting corrosion device comprises:

the reciprocating translation executing component of the reciprocating driving component 3 is positioned on the test bench 2, two ends of the bone plate 4 are respectively provided with a bone nail, wherein the bone plate 4 is matched with the bone nail, the bone nail is provided with a plastic sleeve 41, the plastic sleeve 41 is internally provided with internal threads, the plastic sleeve 41 is in threaded connection with the bone nail, the plastic sleeve 41 on one of the bone nails is connected with the test bench 2, the plastic sleeve 41 on the other bone nail is connected with the executive component of the reciprocating drive component, so that the joint of the bone nail and the bone plate 4 can generate micro-motion when the reciprocating driving component acts, the test board 2 is provided with a narrow slit guide groove 21, the plastic sleeve 41 connected to the test bench 2 is provided with a threaded portion and a nut 42 engaged with the threaded portion, wherein the threaded portion penetrates through the narrow slit guide groove 21 and the bottom of the threaded portion abuts against the test platform 2, and the nut 42 is attached on the test platform 2, so that the position of the bone screw relative to the test platform 2 can be adaptively adjusted according to the length of the bone plate 4.

As a preferred embodiment, two test platforms 2 are arranged on both sides of the support 1, and the number of the bone plates 4 is the same as that of the test platforms 2, and the two test platforms correspond to one another, so that the two bone plates 4 can be tested at the same time, and the test efficiency is further ensured.

The reciprocating driving assembly consists of a cam 31, a linear bearing 32 and a push rod 33, wherein the cam 31 is rotatably installed on the bracket 1 and is positioned between the two test platforms 2, the cam 31 is driven by a motor, the linear bearing 32 is arranged on each of the two test platforms 2, the push rod 33 is arranged in the linear bearing 32, one end of the push rod 33 faces the cam 31, the push rod 33 can be pushed to translate when a convex part of the cam 31 is contacted with the push rod 33, the other end of the push rod 33 is connected with a plastic sleeve 41 on the bone nail, a spring is arranged between the push rod 33 and the test platforms 2, and then power is provided for the return stroke of the push rod 33, so that the push rod 33 can translate in a reciprocating manner.

As a preferred embodiment, the cam 31 is a regular pentagon, and the push rod 33 can test the bone plate 4 five times after the cam 31 rotates one circle, although the shape of the cam 31 is not limited to the regular pentagon.

The working principle of the utility model is as follows: specifically, as shown in fig. 4, a beaker 5 is placed below each of two test benches 2, and physiological saline is placed in the beaker 5, at this time, the PH value of the physiological saline is measured, then bone screws are inserted into the bone plates 4, then the bone plates 4 with the bone screws are placed in the beaker 5, then the plastic sleeves 41 on one of the bone screws are connected with the test benches 2, and the plastic sleeves 41 on the other bone screw are connected with the push rods 33, at this time, the installation is completed for testing, the cam 3 rotates during the wear test, and then the push rods 33 are pushed to perform reciprocating translation, the push rods 33 drive the plastic sleeves 41 connected with the push rods to move when in action, because the other plastic sleeves 41 are fixedly connected with the test benches 2, the push rods 33 drive the plastic sleeves 41 connected with the push rods to shake, so that the bone screws slightly move relative to the bone plates 4, and then the bone screws are worn during long-term action, and detecting the PH value of the physiological saline in the beaker 5 in real time to obtain the abrasion loss.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a board nail fine motion corrosion device, includes support (1), testboard (2), reciprocal drive assembly and hone lamella (4), testboard (2) set up on support (1), its characterized in that:

the reciprocating translation executing component of the reciprocating driving component (3) is positioned on the test bench (2), two ends of the bone lamella (4) are respectively provided with a bone nail, the bone nails are provided with plastic sleeves (41), the plastic sleeve (41) on one bone nail is connected with the test bench (2), and the plastic sleeve (41) on the other bone nail is connected with the executing component of the reciprocating driving component.

2. The plate nail fretting corrosion device according to claim 1, wherein: be equipped with slot guide slot (21) on testboard (2), be equipped with screw thread portion and with screw thread portion complex nut (42) on plastic sleeve (41) that testboard (2) are connected, wherein screw thread portion runs through slot guide slot (21) and the bottom of screw thread portion supports testboard (2), and nut (42) laminating is on testboard (2).

3. The plate nail fretting corrosion device according to claim 1, wherein: two of said test stations (2) are arranged on both sides of the support (1), while the number of bone plates (4) is the same as the test stations (2) and there is a one-to-one correspondence.

4. A plate nail fretting corrosion device according to claim 3, wherein: the reciprocating driving assembly is composed of a cam (31), a linear bearing (32) and a push rod (33), the cam (31) is rotatably installed on the support (1) and located between the two test platforms (2), the linear bearing (32) is arranged on each test platform (2), the push rod (33) is arranged in each linear bearing (32), one end of each push rod (33) faces the cam (31), the push rods (33) can be pushed to translate when the protruding portions of the cams (31) are in contact with the push rods (33), and the other ends of the push rods (33) are connected with plastic sleeves (41) on the bone nails.

5. The plate nail fretting corrosion device according to claim 4, wherein: the cam (31) is in a regular pentagon shape.

6. The plate nail fretting corrosion device according to claim 4, wherein: and a spring is arranged between the push rod (33) and the test bench (2).

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