Metal U-shaped nail mechanical property testing device

Abstract

The utility model discloses a metal U-shaped nail mechanical property testing device which comprises an operation table, a semicircular plate is fixedly installed at the top of the operation table, a square sleeve is fixedly installed at the center of the lower portion of the front side of the semicircular plate, and a fixing piece used for fixing the end of a metal U-shaped nail inserted into the square sleeve and preventing the end of the metal U-shaped nail from being separated is arranged in an inner cavity of the square sleeve. According to the metal U-shaped nail mechanical property testing device, through the arrangement of the fixing piece, the hexagon socket screw is rotated, the U-shaped clamp is pushed towards one side, the end portion of the metal U-shaped nail inserted into the square sleeve can be tightly clamped, and therefore the metal U-shaped nail mechanical property testing device can be used for testing the mechanical property of the metal U-shaped nail. The metal U-shaped nail is effectively prevented from being separated from the square sleeve in the testing process, the stability of the testing process is ensured, basic guarantee is provided for accurately testing the mechanical property of the metal U-shaped nail, operation is easy and convenient, and the testing efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of metal U-shaped nail mechanical performance testing device, specifically a metal U-shaped nail mechanical performance testing device. Background Technology

[0002] U-shaped nails are typically made of metal and have a U-shaped structure with at least two legs. They are inserted into the surface of human bone to fix or stabilize adjacent bone fragments, or to fix soft tissue or other materials to bone. U-shaped nails require fatigue testing, which involves applying cyclic loads to the product based on its location and frequency of use within the human body.

[0003] Chinese Patent CN221993220U discloses a U-shaped nail bending fatigue testing fixture. The fixture includes two support blocks and two pressing components. The two support blocks extend along a first direction and are spaced apart along that direction. The sidewalls of the two support blocks, at their closest points, have mounting holes extending along a second direction. The two legs of the U-shaped nail extend into the mounting holes of the two support blocks respectively. The bottom of each mounting hole has a tapered section, and the holes are filled with adhesive to fix the two legs of the U-shaped nail within them. The two pressing components are located on both sides of the support blocks along the second direction. A first abutting block, a third abutting block, a fourth abutting block, and a second abutting block are sequentially arranged along the first direction. The first and third abutting blocks abut against both sides of one support block along the second direction, and the fourth and second abutting blocks abut against both sides of the other support block along the second direction.

[0004] The aforementioned U-shaped nail bending fatigue testing fixture has some problems in use. Before each test, a release agent needs to be sprayed into the mounting hole, and after the test, the solidified glue needs to be knocked out from the bottom of the mounting hole. This process increases the operation steps and time cost of the test, and reduces the test efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a metal U-shaped nail mechanical property testing device to solve the problem in the background art that it is necessary to spray a release agent into the mounting hole before each test and knock out the solidified glue from the bottom of the mounting hole after the test. This process increases the operation steps and time cost of the test and reduces the test efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A mechanical property testing device for a metal U-shaped nail includes an operating table. A semi-circular plate is fixedly installed on the top of the operating table. A square sleeve is fixedly installed at the center of the lower front side of the semi-circular plate. The inner cavity of the square sleeve is provided with a fixing member for fixing the end of the metal U-shaped nail inserted therein to prevent it from falling out. A testing component is provided on the front side of the semi-circular plate and on one side of the square sleeve for bending the other end of the metal U-shaped nail to test its mechanical properties.

[0008] The fastener includes a U-shaped clip that slides left and right within the inner cavity of a square sleeve. The opening of the U-shaped clip faces the test assembly. Two sets of through holes adapted to the ends of the U-shaped clip are provided on one side surface of the square sleeve. An internal hexagon bolt is threaded onto the other side surface of the square sleeve. The end of the internal hexagon bolt is threaded through the square sleeve and connected to the end surface of the U-shaped clip via a rotating connector.

[0009] As a preferred technical solution, the rotating connector includes an adapter groove formed at the end of the U-shaped clip, an adapter post rotatably connected to the inner cavity of the adapter groove, and the end of the adapter post being fixedly connected to the end of the internal hexagon bolt.

[0010] As a preferred technical solution, the test assembly includes a connecting post that is rotatably inserted into the front side of the semicircular plate and located on one side of the square sleeve. Both ends of the connecting post are fixedly connected to U-shaped frames. The ends of the U-shaped frames can rotate around the outer circular surface of the semicircular plate with the connecting post as the center. The ends of the U-shaped frames are fixedly connected to handles. The front side of the U-shaped frames is connected to a square tube through a sliding connector. The inside of the square tube is provided with an anti-detachment component to prevent the ends of the metal U-shaped nails from detaching.

[0011] As a preferred technical solution, the sliding connector includes a strip groove formed inside the front side of the U-shaped frame and arranged along its length. A strip plate is slidably connected to the inner cavity of the strip groove. A communicating hole is formed on the front side of the U-shaped frame. A fixing screw is fixedly connected to the front side of the strip plate. The end of the fixing screw passes through the communicating hole and is fixedly connected to the surface of the square tube. A nut is threadedly connected to the surface of the fixing screw located outside the U-shaped frame. The nut abuts against the surface of the U-shaped frame.

[0012] As a preferred technical solution, the anti-detachment component includes a hand-tightening bolt threaded to one side of the square tube, the hand-tightening bolt having its threads penetrating the square tube and being fixedly connected to an abutment plate.

[0013] As a preferred technical solution, a scale groove is provided on the front left side of the semicircular plate and near the outer circle side of the semicircular plate, and an observation port for observing the scale groove is provided on the front surface of the U-shaped frame at a position corresponding to the scale groove.

[0014] As a preferred technical solution, the U-shaped frame is internally fixedly connected with two sets of guide columns, and the front side of the semicircular plate is provided with guide holes for the guide columns to slide. The two sets of guide columns are respectively slidably connected to the inner cavity of the corresponding side guide holes.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, through the setting of a fixing component, rotates the internal hexagonal bolt and pushes the U-shaped clip to one side, which can tightly lock the end of the metal U-shaped nail inserted into the square sleeve, effectively preventing it from detaching from the square sleeve during the test, ensuring the stability of the test process, providing a basic guarantee for accurately testing the mechanical properties of the metal U-shaped nail, and is simple and convenient to operate, which helps to improve the test efficiency. At the same time, the movement distance of the U-shaped clip can be controlled to achieve a firm fixation of U-shaped nails of different sizes.

[0017] 2. This utility model, through the setting of the sliding connector, can flexibly adjust the position of the square tube according to the length of the U-shaped nail, so that the test fixture can adapt to the testing of U-shaped nails of different sizes and positions, greatly improving the versatility of the test fixture. At the same time, the adjustment method is simple to operate, and users can quickly complete the adjustment of the position of the square tube without the need for complicated tools, thus improving the efficiency of the testing work.

[0018] 3. This utility model allows for clear reading of the scale on the groove through the observation port, thereby precisely controlling the bending angle. This provides crucial data support for accurately evaluating the mechanical properties of the U-shaped nail at different bending angles, helping to improve the scientific rigor and accuracy of the test results. Furthermore, the precise control of the bending angle allows tests conducted by different operators or in different batches to be performed under the same or precisely comparable angle conditions, enhancing the comparability of test results and facilitating a more comprehensive and systematic analysis of the mechanical properties of the U-shaped nail. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the mechanical performance testing device for the metal U-shaped nail of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the U-shaped frame of this utility model;

[0021] Figure 3 This is a cross-sectional view of the square sleeve of this utility model;

[0022] Figure 4 This is a schematic diagram of the structural location of the adapter groove in this utility model.

[0023] In the picture:

[0024] 100. Operating table; 101. Semicircular plate; 102. Scale groove; 103. Guide hole; 104. Connecting column; 105. Guide column; 106. Observation port;

[0025] 200. Square sleeve; 201. Through hole; 202. U-shaped clip; 203. Socket head bolt; 204. Adapter post; 205. Adapter groove;

[0026] 300. U-shaped frame; 301. Square tube; 302. Abutment plate; 303. Hand-tightening bolt; 304. Strip plate; 305. Nut; 306. Fixing screw; 307. Strip groove; 308. Connecting hole; 309. Handle. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-4 This embodiment provides a mechanical performance testing device for a metal U-shaped nail, including an operating table 100. A semi-circular plate 101 is fixedly installed on the top of the operating table 100. A square sleeve 200 is fixedly installed at the lower center of the front side of the semi-circular plate 101. The inner cavity of the square sleeve 200 is provided with a fixing member for fixing the end of the metal U-shaped nail inserted inside it to prevent it from falling out. A testing component is provided on the front side of the semi-circular plate 101 and on one side of the square sleeve 200 for bending the other end of the metal U-shaped nail to test its mechanical performance.

[0029] The fixing component includes a U-shaped clip 202 that slides left and right within the inner cavity of the square sleeve 200. The opening of the U-shaped clip 202 faces the test component. Two sets of through holes 201 adapted to the ends of the U-shaped clip 202 are provided on one side surface of the square sleeve 200. An internal hexagon bolt 203 is threadedly connected to the other side surface of the square sleeve 200. The end of the internal hexagon bolt 203 is threaded through the square sleeve 200 and connected to the end surface of the U-shaped clip 202 through a rotating connector. By rotating the internal hexagon bolt 203, the U-shaped clip 202 is pushed to one side, which can tightly lock the end of the metal U-shaped nail inserted into the square sleeve 200, effectively preventing it from detaching from the square sleeve 200 during the test, ensuring the stability of the test process, providing a basic guarantee for accurately testing the mechanical properties of the metal U-shaped nail, and is simple and convenient to operate, which helps to improve the test efficiency. At the same time, the movement distance of the U-shaped clip 202 can be controlled to achieve a firm fixation of U-shaped nails of different sizes.

[0030] The rotating connector includes an adapter groove 205 at the end of the U-shaped clip 202. An adapter post 204 is rotatably connected to the inner cavity of the adapter groove 205. The end of the adapter post 204 is fixedly connected to the end of the internal hex bolt 203. By setting the rotating connector, the adapter post 204 rotates in the adapter groove 205 during the rotation of the internal hex bolt 203, thus avoiding the generation of additional torque on the end of the U-shaped clip 202 when the internal hex bolt 203 rotates.

[0031] The testing assembly includes a connecting post 104 rotatably inserted into the front of the semicircular plate 101 and located on one side of the square sleeve 200. U-shaped frames 300 are fixedly connected to both ends of the connecting post 104. The ends of the U-shaped frames 300 can rotate around the outer surface of the semicircular plate 101 with the connecting post 104 as the center. A handle 309 is fixedly connected to the end of the U-shaped frame 300. A square tube 301 is connected to the front side of the U-shaped frame 300 via a sliding connector. An anti-detachment component is installed inside the square tube 301 to prevent the end of the metal U-shaped nail from detaching. Through the setup of the testing assembly, the cooperation between the connecting post 104 and the U-shaped frame 300 allows the U-shaped frame 300 to rotate around the outer surface of the semicircular plate 101. With the handle 309, the user can easily operate the U-shaped frame 300 to bend the metal U-shaped nail at different angles, meeting diverse mechanical performance testing needs and helping to comprehensively evaluate the performance of the U-shaped nail at different bending angles.

[0032] The sliding connector includes a strip groove 307 formed inside the front side of the U-shaped frame 300 and arranged along its length. A strip plate 304 is slidably connected to the inner cavity of the strip groove 307. A connecting hole 308 is formed on the front side of the U-shaped frame 300. A fixing screw 306 is fixedly connected to the front side of the strip plate 304. The end of the fixing screw 306 passes through the connecting hole 308 and is fixedly connected to the surface of the square tube 301. A nut 305 is threadedly connected to the surface of the fixing screw 306 located on the outside of the U-shaped frame 300. The nut 305 abuts against the surface of the U-shaped frame 300. By setting up the sliding connector, the position of the square tube 301 can be flexibly adjusted according to the length of the U-shaped nail, so that the test fixture can adapt to the testing of U-shaped nails of different sizes and positions, which greatly improves the versatility of the test fixture. At the same time, the adjustment method is simple to operate, and users can quickly complete the adjustment of the position of the square tube 301 without the need for complicated tools, which improves the efficiency of the testing work.

[0033] The anti-detachment component includes a hand-tightening bolt 303 threaded to one side of the square tube 301. The hand-tightening bolt 303 is threaded through the square tube 301 and fixedly connected to an abutment plate 302. By rotating the hand-tightening bolt 303, the abutment plate 302 is tightly pressed against the end of the U-shaped nail, which further enhances the fixing effect of the U-shaped nail and prevents it from coming out of the square tube 301 during the bending test. This avoids test interruption or inaccurate results due to the U-shaped nail coming out, and ensures the safety and integrity of the test process.

[0034] The semicircular plate 101 has a graduated groove 102 on its front left side, near the outer circumference of the semicircular plate 101. The U-shaped frame 300 has an observation port 106 on its front surface, corresponding to the graduated groove 102. Through the arrangement of the graduated groove 102 and the through port, the graduated groove 102 on the semicircular plate 101 and the observation port 106 on the U-shaped frame 300 work together. When the operator rotates the U-shaped frame 300 to bend the U-shaped nail, they can clearly read the graduations on the graduated groove 102 through the observation port 106, thus precisely controlling the bending angle. This provides crucial data support for accurately evaluating the mechanical properties of the U-shaped nail at different bending angles, helping to improve the scientific rigor and accuracy of the test results. Furthermore, the ability to precisely control the bending angle allows tests conducted by different operators or in different batches to be performed under the same or precisely comparable angle conditions, enhancing the comparability of test results and facilitating a more comprehensive and systematic analysis of the mechanical properties of the U-shaped nail.

[0035] The U-shaped frame 300 has two sets of guide posts 105 fixedly connected inside. The front side of the semi-circular plate 101 has guide holes 103 for the guide posts 105 to slide. The two sets of guide posts 105 are slidably connected to the inner cavity of the corresponding guide holes 103. Through the setting of the guide holes 103 and guide posts 105, the guide posts 105 slide in the guide holes 103 during the rotation of the U-shaped frame 300 around the connecting post 104, which plays a good guiding and limiting role, ensuring that the rotation of the U-shaped frame 300 is stable, avoiding shaking or deviation, making the bending operation more accurate, and improving the reliability and consistency of the test results.

[0036] Working principle;

[0037] First, take out the metal U-shaped nail to be tested, align one set of ends of the metal U-shaped nail with the inner cavity of the square sleeve 200, and push the square tube 301 to one side so that the opening of the square tube 301 is aligned with the other end of the metal U-shaped nail. Then tighten the nut 305 so that the nut 305 abuts against the surface of the U-shaped frame 300 to fix the strip plate 304 and prevent the square tube 301 from moving during use.

[0038] Then, the two ends of the metal U-shaped nail are respectively inserted into the inner cavities of the square sleeve 200 and the square tube 301. At this time, the internal hex bolt 203 is rotated. When the internal hex bolt 203 is rotated, the adapter post 204 rotates in the adapter groove 205, causing the U-shaped clip 202 to slide left and right, so that the opening of the U-shaped clip 202 tightly clamps the end of the metal U-shaped nail, thereby fixing one end of the metal U-shaped nail and preventing it from coming off the square sleeve 200 during the test.

[0039] At this point, tighten the hand-tightening bolt 303 connected to the rotating thread on one side of the square tube 301. The thread of the hand-tightening bolt 303 passes through the square tube 301 and drives the abutment plate 302 to move, so that the abutment plate 302 tightly abuts against the end of the metal U-shaped nail, preventing it from coming out of the square tube 301 during the test.

[0040] The operator can hold the handle 309 at the end of the U-shaped frame 300 and push it upward, so that the U-shaped frame 300 can rotate around the outer circle of the semicircular plate 101 with the connecting column 104 as the center. This allows for easy bending of the other end of the metal U-shaped nail to test its mechanical properties, thereby simulating bending at different angles and in different ways to meet diverse testing needs.

[0041] Meanwhile, the operator observes the scale on the scale groove 102 through the observation port 106 to determine the rotation angle of the U-shaped frame 300, that is, the bending angle of the metal U-shaped nail, so as to accurately control and record the bending angle parameters during the test.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the mechanical properties of a metal U-shaped nail, characterized in that, The device includes an operating table (100), on the top of which a semi-circular plate (101) is fixedly installed. A square sleeve (200) is fixedly installed at the center of the lower front side of the semi-circular plate (101). The inner cavity of the square sleeve (200) is provided with a fixing member for fixing the end of a metal U-shaped nail inserted therein to prevent it from falling off. A test component is provided on the front side of the semi-circular plate (101) and on one side of the square sleeve (200) for bending the other end of the metal U-shaped nail to test its mechanical properties. The fastener includes a U-shaped clip (202) that slides left and right within the cavity of the square sleeve (200). The opening of the U-shaped clip (202) faces the test assembly. Two sets of through holes (201) adapted to the ends of the U-shaped clip (202) are provided on one side surface of the square sleeve (200). An internal hexagon bolt (203) is threaded onto the other side surface of the square sleeve (200). The end of the internal hexagon bolt (203) is threaded through the square sleeve (200) and connected to the end surface of the U-shaped clip (202) through a rotating connector.

2. The metal U-shaped nail mechanical property testing device according to claim 1, characterized in that: The rotating connector includes an adapter groove (205) at the end of the U-shaped clip (202), and an adapter post (204) is rotatably connected to the inner cavity of the adapter groove (205). The end of the adapter post (204) is fixedly connected to the end of the internal hex bolt (203).

3. The mechanical property testing device for a metal U-shaped nail according to claim 1, characterized in that: The test assembly includes a connecting post (104) that is rotatably inserted into the front side of the semicircular plate (101) and located on one side of the square sleeve (200). Both ends of the connecting post (104) are fixedly connected to a U-shaped frame (300). The end of the U-shaped frame (300) can rotate around the outer circular surface of the semicircular plate (101) with the connecting post (104) as the center. The end of the U-shaped frame (300) is fixedly connected to a handle (309). The front side of the U-shaped frame (300) is connected to a square tube (301) through a sliding connector. The inside of the square tube (301) is provided with an anti-detachment component to prevent the end of the metal U-shaped nail from detaching.

4. The mechanical property testing device for a metal U-shaped nail according to claim 3, characterized in that: The sliding connector includes a strip groove (307) formed inside the front side of the U-shaped frame (300) and arranged along its length. A strip plate (304) is slidably connected to the inner cavity of the strip groove (307). A connecting hole (308) is formed on the front side of the U-shaped frame (300). A fixing screw (306) is fixedly connected to the front side of the strip plate (304). The end of the fixing screw (306) passes through the connecting hole (308) and is fixedly connected to the surface of the square tube (301). A nut (305) is threadedly connected to the surface of the fixing screw (306) located outside the U-shaped frame (300). The nut (305) abuts against the surface of the U-shaped frame (300).

5. The mechanical property testing device for a metal U-shaped nail according to claim 4, characterized in that: The anti-detachment component includes a hand-tightening bolt (303) threaded to one side of the square tube (301), the hand-tightening bolt (303) being threaded through the square tube (301) and fixedly connected to an abutment plate (302).

6. The mechanical property testing device for a metal U-shaped nail according to claim 5, characterized in that: A scale groove (102) is provided on the left front side of the semicircular plate (101) and near the outer circle side of the semicircular plate (101). An observation port (106) for observing the scale groove (102) is provided on the front surface of the U-shaped frame (300) at a position corresponding to the scale groove (102).

7. The mechanical property testing device for a metal U-shaped nail according to claim 6, characterized in that: The U-shaped frame (300) has two sets of guide posts (105) fixedly connected inside. The front side of the semi-circular plate (101) is provided with guide holes (103) for the guide posts (105) to slide. The two sets of guide posts (105) are respectively slidably connected to the inner cavity of the corresponding side guide holes (103).

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