Fatigue test tool for femoral neck nail

Abstract

The utility model provides a fatigue test tool for a femur neck nail, and relates to the technical field of fatigue test devices, the fatigue test tool for the femur neck nail comprises a femur neck nail which comprises a top end and a bottom end; the lower clamp is used for fixing the bottom end of the femoral neck nail; the upper clamp comprises a sliding part and a fixed seat for placing the sliding part; and the top end of the femoral neck nail is in contact with the sliding piece. The tool for the fatigue test of the femoral neck nail is simple in structure, easy to operate and high in stability, the correction function of the tool can be achieved through sliding of the sliding piece in the sliding groove, lateral loads in the bending process are effectively eliminated, errors caused by lateral force are avoided, and the fatigue test accuracy is improved. And the accuracy and the reliability of a test result are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to fatigue test device technical field especially a kind of for femoral neck nail fatigue test tool. BACKGROUND

[0002] Femoral neck is located in proximal femur, bears the weight of upper body, and gas is transmitted to the upper and lower human biomechanics elements, maintains the biomechanical function of lower limb. Femoral neck nail implanted in femoral neck position bears compression bending load in human body, and this situation is the most common load type in vivo. At present, our country has formulated industry standard YY / T 0346, which regulates the fatigue compression bending performance test method of femoral neck nail.

[0003] The standard provides femoral neck nail compression bending performance schematic diagram as shown in Figure 1 Head end position of femoral neck nail is rigidly fixed on testing machine, fixed end should be firm enough, and fixed end should not be loose during test, and in principle, load arm L should not be longer than 1 / 2 of the full length of femoral neck nail. Femoral neck nail forms a angle with horizontal direction (in general case, a is recommended as 45 ° ± 1 °), vertical downward load is applied to tail end of femoral neck nail, and loading device should be able to eliminate lateral load in compression bending process. However, there are still few test devices for femoral neck nail mechanical property test at present, therefore, it is of great significance for the development of biomechanics to provide a kind of femoral neck nail fatigue test tool with simple structure, stability and reliability. UTILITY MODEL CONTENT

[0004] In order to better test various mechanical properties of femoral neck nail, the utility model provides a kind of femoral neck nail fatigue test tool, which can realize its correction function by sliding of sliding part in sliding groove, effectively eliminates lateral load in compression bending process, has simple structure, stability and reliability, so as to realize the accuracy of test result.

[0005] The utility model solves the technical scheme adopted by its technical problems:

[0006] A kind of femoral neck nail fatigue test tool, comprising:

[0007] Femoral neck nail, the femoral neck nail includes top end and bottom end;

[0008] Lower clamp, for fixing the bottom end of the femoral neck nail;

[0009] Upper clamp, the upper clamp includes sliding part and the fixed seat for placing sliding part;The fixed seat is opened with the sliding groove that can be slid by sliding part;The top end of the femoral neck nail is in contact with the sliding part.

[0010] Optionally, the sliding member comprises a connecting rod, a fixed plate and a pulley; one end of the connecting rod is fixedly connected with the fixed plate, and the pulley is rotatably connected to the fixed plate.

[0011] Optionally, a sliding rail is formed in the fixed seat and is communicated with the sliding groove.

[0012] Optionally, the pulleys are arranged at two ends of the fixed plate.

[0013] Optionally, the number of the pulleys is four, and the pulleys are symmetrically arranged on two sides of the connecting rod.

[0014] Optionally, the other end of the connecting rod is connected with a loading head.

[0015] Optionally, a receiving groove is formed in the bottom of the loading head and can accommodate the top end of the femoral neck nail.

[0016] Optionally, the lower clamp comprises a lower clamping groove and a fastening screw, the bottom end of the femoral neck nail is fixed in the lower clamping groove and is locked by the fastening screw.

[0017] The femoral neck nail fatigue test tool has the advantages that the structure is simple, the tool is easy to operate and has high stability, the correction function is realized by sliding of the sliding member in the sliding groove, the lateral load in the compression-bending process is effectively eliminated, errors caused by the lateral force are avoided, and the accuracy and reliability of the test result are ensured.

[0018] The femoral neck nail fatigue test tool has the advantages that the structure is simple, the tool is easy to operate and has high stability, the correction function is realized by sliding of the sliding member in the sliding groove, the lateral load in the compression-bending process is effectively eliminated, errors caused by the lateral force are avoided, and the accuracy and reliability of the test result are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model is further described below in combination with the drawings and examples.

[0020] Figure 1 is a compression-bending performance schematic diagram of the femoral neck nail in the YY / T 0346 standard;

[0021] Figure 2 is a whole structure schematic diagram of the femoral neck nail fatigue test tool of the utility model;

[0022] Figure 3 is an exploded view of the femoral neck nail fatigue test tool in the utility model;

[0023] In the drawing: 1-femoral neck nail; 11-top end; 12-bottom end; 13-loading head; 2-lower clamp; 21-lower clamping groove; 22-fastening screw; 3-upper clamp; 31-sliding member; 311-connecting rod; 312-fixed plate; 313-pulley; 32-fixed seat; 321-sliding groove; 322-sliding rail. DETAILED DESCRIPTION

[0024] The utility model will be explained further in detail. The following described embodiment is exemplary, and is intended for explaining the utility model, and can not be understood as the limitation of the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor based on the embodiment of the utility model belong to the range of protection of the utility model.

[0025] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are explained in detail below with reference to the drawings.

[0026] In order to better test the various mechanical properties of the femoral neck nail 1, the utility model provides a kind of femoral neck nail fatigue test tool, referring to Figures 2-3 As shown in the figure, the femoral neck nail fatigue test tool includes: femoral neck nail 1, wherein the femoral neck nail 1 includes top 11 and bottom end 12;Lower clamp 2 is used to fix the bottom end 12 of femoral neck nail 1;Upper clamp 3, wherein the upper clamp 3 includes sliding piece 31 and fixing seat 32 for placing sliding piece 31;And fixing seat 32 is provided with sliding groove 321 for sliding piece 31 sliding;The top 11 of femoral neck nail 1 is in contact with sliding piece 31.

[0027] The femoral neck nail fatigue test tool of the utility model is simple in structure, easy to operate, and has high stability, and the correction function can be realized by the sliding of sliding piece 31 in sliding groove 321, the lateral load in the compression bending process is effectively eliminated, so that the error caused by lateral force is avoided, and the accuracy and reliability of test results are ensured.

[0028] Specifically, the utility model preferably sliding piece 31 includes connecting rod 311, fixed plate 312 and pulley 313;One end of connecting rod 311 is fixedly connected with fixed plate 312, and pulley 313 is rotatably connected to fixed plate 312.

[0029] Further, the utility model preferably that fixing seat 32 is provided with sliding rail 322 for the sliding of connecting rod 311, and sliding rail 322 is communicated with sliding groove 321.

[0030] In order to effectively eliminate the lateral load in the compression bending process, the utility model preferably that pulley 313 is arranged at both ends of fixed plate 312.

[0031] Further, the utility model preferably that the number of pulley 313 is four, and symmetrically distributed on both sides of the connecting rod 311;When femoral neck nail 1 encounters lateral force in compression bending test, the rolling of four pulleys 313 can make sliding piece 31 in sliding groove 321 in fixing seat 32 fine adjustment, so as to compensate the influence of lateral force, and this automatic adjustment helps to keep the stability of femoral neck nail 1 in test, and reduces the error caused by lateral force.

[0032] The other end of the connecting rod 311 is preferably screwed with a loading head 13; for adjusting the distance from the top end 11 of the femoral neck nail 1.

[0033] Further, the bottom of the loading head 13 is preferably provided with a containing groove capable of containing the top end 11 of the femoral neck nail 1; which can better adapt to the top end 11 of the femoral neck nail 1, ensure the accuracy of loading, and at the same time reduce the damage to the femoral neck nail 1, prolong its service life.

[0034] In order to ensure the stability of the femoral neck nail 1 during the test process, the lower clamp 2 preferably comprises a lower clamping groove 21 and a fastening screw 22, and the bottom end 12 of the femoral neck nail 1 is fixed in the lower clamping groove 21 and locked by the fastening screw 22.

[0035] The process of the femoral neck nail fatigue test by the utility model is as follows: first, the bottom end 12 of the femoral neck nail 1 is fixed in the lower clamping groove 21 of the lower clamp 2 and locked by the fastening screw 22, to ensure that it is stable and immovable during the test process; then, the sliding part 31 in the upper clamp 3 is adjusted, so that the top end 11 of the femoral neck nail 1 is in contact with the loading head 13 of the sliding part 31; during the fatigue test, the sliding part 31 can slide forward and backward in the sliding groove 321 of the fixed seat 32, and the pulley 313 rolls with it, to compensate for the possible lateral force and ensure the accuracy of the test.

[0036] By simulating the mechanical environment that the femoral neck nail 1 may encounter in actual use, the tooling can accurately apply fatigue load, and at the same time, the correction function is realized by the sliding of the sliding part 31 in the sliding groove 321, which can effectively eliminate the lateral load in the compression and bending process, thereby ensuring the accuracy and reliability of the test results. Based on the ideal embodiment of the utility model, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A fixture for fatigue testing of femoral neck screws, characterized in that, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

2. The femoral neck bolt fatigue test fixture of claim 1 wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

3. The femoral neck bolt fatigue test fixture of claim 2, wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

4. The femoral neck bolt fatigue test fixture of claim 2, wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

5. The femoral neck bolt fatigue test fixture of claim 2 wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

6. The femoral neck bolt fatigue test fixture of claim 3, wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

7. The femoral neck nail fatigue test fixture of claim 6 wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12).

8. The femoral neck nail fatigue test fixture of claim 1 wherein, The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (12). The utility model relates to a femoral neck nail (1) and a lower clamp (2) and an upper clamp (3) for fixing the femoral neck nail (1), and the femoral neck nail (1) comprises a top end (11) and a bottom end (

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