Adjustable acetabulum prying experiment device

Abstract

The invention provides an adjustable acetabulum prying-out experimental device, and belongs to the technical field of combined acetabulum component separation experiments. A T-shaped sliding groove is formed in the lower end of the eccentric prying-out base and used for being fixedly connected with a workbench through screws; the crow plate lifting device comprises a lifter support, a connecting block, a threaded lifting rod, an adjusting nut, a first M6 thread and a sliding block, and modularization and function cooperation of the testing system are achieved by integrating the eccentric prizing base, the crow plate lifting device, the acetabulum assembly loading device and the adjustable crow plate device; by means of the structural design, the device can meet the multi-dimensional adjustment requirements of the moment arm distance, the supporting point position and the height at the same time, and the problem that a traditional device is insufficient in adaptability due to the single structure is solved. Precise cooperation among the components not only improves operation flexibility, but also ensures structural stability in the testing process through high-strength connection.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of combined acetabular component separation experiment, and particularly relates to an adjustable acetabular prying-out experiment device. BACKGROUND

[0002] As a core component of artificial hip joint replacement surgery, the stability and anti-separation performance of the acetabular prosthesis directly affect the long-term effect of the surgery.

[0003] After being implanted into the human body, the acetabular component needs to bear complex dynamic loads, and if loosening or separation occurs, the prosthesis may fail, causing the risk of secondary surgery. At present, there are few experimental devices for the separation force of combined acetabular components, and there are problems of single structure and insufficient adaptability. Since the acetabular product specifications are diverse, the traditional device cannot be universal, and the tooling needs to be frequently replaced, affecting the testing efficiency. SUMMARY

[0004] The purpose of the application is to provide an adjustable acetabular prying-out experiment device, which aims to solve the problem in the prior art that after being implanted into the human body, the acetabular component needs to bear complex dynamic loads, and if loosening or separation occurs, the prosthesis may fail, causing the risk of secondary surgery. At present, there are few experimental devices for the separation force of combined acetabular components, and there are problems of single structure and insufficient adaptability. Since the acetabular product specifications are diverse, the traditional device cannot be universal, and the tooling needs to be frequently replaced, affecting the testing efficiency.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0006] An adjustable acetabular prying-out experiment device comprises:

[0007] An eccentric prying-out base is provided with a T-shaped sliding groove at the lower end, which is used to be fixedly connected with a workbench through a screw;

[0008] A prying plate lifting device comprises a lifter support, a connecting block, a threaded lifting rod, an adjusting nut, a first M6 thread and a sliding block. The sliding block is located in the T-shaped sliding groove, the first M6 thread is threadedly connected in the sliding block, the lifter support is threadedly connected with the first M6 thread, the adjusting nut is located in the lifter support, the threaded lifting rod is threadedly connected in the adjusting nut, and the connecting block is fixedly connected to the upper end of the threaded lifting rod;

[0009] An acetabular assembly loading device comprises a metal cup holder, a metal cup holder sliding block, a second M6 thread and a threaded compression cap. The metal cup holder sliding block is located in the T-shaped sliding groove, the second M6 thread is threadedly connected in the metal cup holder sliding block, the metal cup holder is fixedly connected to the upper end of the metal cup holder sliding block, and the threaded compression cap is threadedly connected with the metal cup holder;

[0010] The adjustable pry plate device comprises a pry plate body, a positioning slider, a pull hook and two positioning nuts, the pry plate body is sleeved on the surface of the connecting block through a bolt, the two positioning nuts are located in the pry plate body, and the positioning slider and the pull hook are located on the lower side of the pry plate body.

[0011] As a preferred scheme of the present application, the surface of the pry plate body is marked with a scale line.

[0012] As a preferred scheme of the present application, the pry plate lifting device drives the threaded lifting rod to realize millimeter-level height fine adjustment by rotating the adjusting nut.

[0013] As a preferred scheme of the present application, the position of the pull hook is accurately adjusted through the positioning nut and the scale line.

[0014] As a preferred scheme of the present application, the eccentric pry-out base, the pry plate lifting device, the acetabular assembly loading device and the adjustable pry plate device are connected through high-strength bolts to form a modular split structure.

[0015] As a preferred scheme of the present application, the adjusting nut is provided with a net structure to facilitate manual operation.

[0016] As a preferred scheme of the present application, the threaded pressing cap is matched with the metal cup holder to fix acetabular assemblies of different specifications.

[0017] As a preferred scheme of the present application, the position of the pull hook is accurately adjusted through the positioning nut and the scale line, and the adjustment range is 0-±90mm.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. By integrating the eccentric pry-out base, the pry plate lifting device, the acetabular assembly loading device and the adjustable pry plate device, the modularity and function cooperation of the test system are realized. The structure design enables the device to simultaneously meet the multi-dimensional adjustment requirements of the force arm distance, the support point position and the height, solves the problem of insufficient adaptability caused by the single structure of the traditional device, and ensures the structural stability during the test through the precise cooperation between the components and the high-strength connection, thereby providing a reliable hardware foundation for the acetabular component separation experiment.

[0020] 2. By setting the scale line on the pry plate body and cooperating with the millimeter-level fine adjustment function of the threaded lifting mechanism, the positioning accuracy of the force application point is significantly improved. The adjustable design of the pull hook position is combined with the modular split structure, so that the device can quickly adapt to acetabular assemblies of different specifications while maintaining the strict consistency of the test conditions. This design not only ensures the accuracy of the experimental data, but also reduces the time cost of changing the tooling, thereby effectively improving the test efficiency.

[0021] 3. The optimized human-computer interaction design and universal structure further enhance the ease of operation of the device. The wide adjustable design of the hook allows the device to cover a wider range of testing needs, while the standardized connection method between modules ensures assembly reliability and facilitates maintenance and functional expansion. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure in this invention;

[0025] Figure 3 This is a schematic diagram of the structure in this invention;

[0026] Figure 4 This is a schematic diagram of the structure in this invention;

[0027] In the diagram: 1. Eccentric pry-out base; 2. Lifter support; 3. Pry plate body; 4. Threaded cap; 5. Positioning nut; 6. Positioning slider; 7. Hook; 8. Connecting block; 9. Adjusting nut; 10. First M6 thread; 11. Slider; 12. Threaded lifting rod; 13. Second M6 bolt; 14. Metal cup holder slider; 15. Metal cup holder. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please see Figures 1-4 The present invention provides the following technical solutions:

[0031] An adjustable acetabular prying experimental device includes:

[0032] The eccentrically pried-out base 1 has a T-shaped groove at its lower end for fixing to the workbench with screws;

[0033] The skid lifting device includes a lifting support 2, a connecting block 8, a threaded lifting rod 12, an adjusting nut 9, a first M6 thread 10, and a slider 11. The slider 11 is located in a T-shaped groove. The first M6 thread 10 is threadedly connected to the slider 11. The lifting support 2 is threadedly connected to the first M6 thread 10. The adjusting nut 9 is located in the lifting support 2. The threaded lifting rod 12 is threadedly connected to the adjusting nut 9. The connecting block 8 is fixedly connected to the upper end of the threaded lifting rod 12.

[0034] An acetabular assembly loading device includes a metal cup holder 15, a metal cup holder slider 14, a second M6 bolt 13, and a threaded cap 4. The metal cup holder slider 14 is located in a T-shaped groove. The second M6 bolt 13 is threadedly connected to the metal cup holder slider 14. The metal cup holder 15 is fixedly connected to the upper end of the metal cup holder slider 14. The threaded cap 4 is threadedly connected to the metal cup holder 15.

[0035] An adjustable skid device includes a skid body 3, a positioning slider 6, a hook 7, and two positioning nuts 5. The skid body 3 is sleeved on the surface of the connecting block 8 by a pin. The two positioning nuts 5 are located inside the skid body 3. The positioning slider 6 and the hook 7 are located on the lower side of the skid body 3.

[0036] In a specific embodiment of the present invention, the lower end of the eccentric pry-out base 1 is provided with a T-shaped groove, which is fixedly connected to the experimental workbench by screws to provide stable support for the overall device. The slider 11 is embedded in the T-shaped groove and fixed to the lifting support 2 by the first M6 thread 10. The adjusting nut 9 cooperates with the threaded lifting rod 12. Rotating the adjusting nut 9 can drive the threaded lifting rod 12 to move up and down, thereby adjusting the height of the pry plate. The metal cup holder slider 14 is fixed in the T-shaped groove by the second M6 bolt 13. The metal cup holder 15 is used to place the acetabular assembly. The threaded cap 4 is used to fix the sample. The pry plate body 3 is connected to the connecting block 8 by a pin. The positioning slider 6 and the hook 7 are fixed to the pry plate body 3 by the positioning nut 5 and can be adjusted according to the scale. When it is necessary to test different specifications of acetabular assemblies, the first M6 thread 10 is loosened. After the second M6 bolt 13, sliding slider 11 and metal cup holder slider 14 are moved to the appropriate position, they are re-fixed. The device can be adapted to different sizes of acetabular components without changing tooling. When it is necessary to adjust the height of the pry bar, rotate the adjusting nut 9 to drive the threaded lifting rod 12 to move up and down, thereby raising and lowering the pry bar body 3. Millimeter-level height fine adjustment can be achieved to ensure that the force application point is accurately aligned with the test part. When it is necessary to adjust the lever arm length or the position of the hook 7, loosen the positioning nut 5, move the positioning slider 6 and hook 7 to the specified position on the scale line, and then re-fix them. The force application point and lever arm length can be flexibly adjusted to improve the test accuracy. When the device needs to be fixed as a whole, the eccentric pry-out base 1 is anchored to the workbench through the T-shaped slide and screws to ensure structural stability during the experiment. The device is not easy to deviate when subjected to prying force, ensuring the reliability of the experimental data. Each component is connected by a high-strength first M6 thread 10 and second M6 bolt 13, ensuring both flexibility and overall rigidity. The threaded lifting rod 12 and the adjusting nut 9 work together to achieve millimeter-level height fine adjustment. The scale line design of the skid body 3 ensures that the lever arm length is precisely controllable. The metal cup holder 15 and the adjustable skid device can be adapted to multiple specifications of acetabular components, significantly improving testing efficiency. The T-shaped slide and the fixing method of the worktable enhance the overall anti-displacement capability, making it suitable for high-load test scenarios.

[0037] Please refer to the details. Figure 1 The surface of the main body of the pry bar 3 is marked with scale lines.

[0038] In this embodiment, the pry bar body 3 is equipped with scale lines for precisely adjusting the positions of the pull hook 7 and the positioning slider 6. These scale lines visually display the lever arm length and the adjustment range of the force application point, ensuring that the position of the force application point is accurately controllable during the experiment, thereby improving the accuracy of the test data.

[0039] Please refer to the details. Figure 3 The skid lifting device achieves millimeter-level height fine-tuning by rotating the adjusting nut 9 to drive the threaded lifting rod 12.

[0040] In this embodiment, the skid lifting device adopts a threaded transmission structure. By rotating the adjusting nut 9, the threaded lifting rod 12 moves up and down, thereby achieving high-precision adjustment of the skid height. This design allows for millimeter-level fine-tuning to adapt to the testing requirements of different acetabular assemblies and ensures precise alignment of the force direction with the testing area.

[0041] Please refer to the details. Figures 1-2 The position of hook 7 can be precisely adjusted using positioning nut 5 and scale lines.

[0042] In this embodiment, the position of the hook 7 can be precisely adjusted using the positioning nut 5 and the scale lines on the pry plate body 3. During operation, first loosen the positioning nut 5, move the hook 7 to the desired scale position, and then tighten it again to ensure that the contact position between the force application point and the acetabular assembly is accurate, thereby improving experimental stability.

[0043] Please refer to the details. Figures 1-4 The eccentric pry-out base 1, the pry plate lifting device, the acetabular assembly loading device and the adjustable pry plate device are connected by high-strength bolts to form a modular split structure.

[0044] In this embodiment, high-strength bolts are used for connection, ensuring both the rigidity and stability of the overall structure while facilitating disassembly and maintenance. The modular design allows the device to be flexibly adjusted to meet different experimental needs, improving its versatility and adaptability.

[0045] Please refer to the details. Figure 3 The adjusting nut 9 has a textured structure for easy manual operation.

[0046] In this embodiment, the surface of the adjusting nut 9 has a textured structure to increase frictional resistance and facilitate manual rotation. This design allows for height adjustment without additional tools, improving the convenience of experimental operations and preventing thread damage due to improper tool use.

[0047] Please refer to the details. Figure 4 The threaded cap 4 mates with the metal cup holder 15 to fix acetabular components of different specifications.

[0048] In this embodiment, the threaded cap 4 and the metal cup holder 15 are connected by threads. By tightening the cap, acetabular assemblies of different sizes can be securely fixed inside the metal cup holder 15. This design optimizes the redundant structure, enabling the device to adapt to various specifications of acetabular products and improving testing efficiency.

[0049] Please refer to the details. Figures 1-2 The position of hook 7 can be precisely adjusted by positioning nut 5 and scale line, with an adjustment range of 0-±90mm.

[0050] In this embodiment, the hook 7 can be adjusted within a range of ±90mm along the scale line on the pry bar body 3 and is fixed by the positioning nut 5. This adjustment range covers the testing requirements of common acetabular components, ensuring that the force application point can accurately match samples of different sizes, thus improving the applicability and accuracy of the experiment.

[0051] The working principle and usage process of this invention are as follows: The eccentric pry-out base 1 is fixed to the experimental workbench via a T-shaped groove and screws to ensure overall stability. The slider 11 is embedded into the T-shaped groove of the base 1, and the lifting support 2 is fixed via the first M6 thread 10. The adjusting nut 9 is rotated to adjust the threaded lifting rod 12 to the initial height, ensuring the pry plate body 3 is parallel to the workbench. The metal cup holder slider 14 is embedded into the T-shaped groove, and the metal cup holder 15 is fixed via the second M6 bolt 13. The position of the metal cup holder 15 is adjusted to maintain a suitable distance from the pry plate body 3. The pry plate body 3 is connected to the connecting block 8 via a pin. The positioning nut 5 is loosened, and the positioning slider 6 and hook 7 are adjusted to the initial position, such as the 0 mark, and then retightened. The acetabular assembly to be tested is placed into the metal cup holder 15, and the threaded pressure cap 4 is tightened. To ensure the sample is securely fixed and prevent loosening during the experiment, loosen the positioning nut 5 according to the size of the acetabular assembly and the testing requirements. Move the hook 7 to the target position along the scale line, then tighten the positioning nut 5 again to ensure that the contact point between the hook 7 and the acetabular assembly is precisely aligned. Rotate the adjusting nut 9 to drive the threaded lifting rod 12 to rise and fall, keeping the force application point of the pry bar body 3 and the acetabular assembly horizontal. Verify whether the height meets the experimental requirements using the scale line or measuring tools. According to the experimental design, move the positioning slider 6 to the designated scale position on the pry bar body 3. After changing and fixing the lever arm length, check whether the force application direction of the hook 7 is vertical or meets the testing standards. Use a mechanical testing instrument to apply a vertical or directional force to the pry bar body 3 to simulate the separation process of the acetabular assembly. Record the force value data in real time and observe the displacement and separation state of the acetabular assembly.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable acetabular prying experimental device, characterized in that: The eccentric pry base (1) is provided with a T-shaped sliding groove at the lower end for fixed connection with the workbench by screws. The pry plate lifting device comprises a lifter support (2), a connecting block (8), a threaded lifting rod (12), an adjusting nut (9), a first M6 thread (10), and a sliding block (11). The sliding block (11) is located in the T-shaped sliding groove, the first M6 thread (10) is threadedly connected in the sliding block (11), the lifter support (2) is threadedly connected with the first M6 thread (10), the adjusting nut (9) is located in the lifter support (2), the threaded lifting rod (12) is threadedly connected in the adjusting nut (9), and the connecting block (8) is fixedly connected to the upper end of the threaded lifting rod (12). The acetabular assembly loading device comprises a metal cup holder (15), a metal cup holder sliding block (14), a second M6 bolt (13), and a threaded compression cap (4). The metal cup holder sliding block (14) is located in the T-shaped sliding groove, the second M6 bolt (13) is threadedly connected in the metal cup holder sliding block (14), the metal cup holder (15) is fixedly connected to the upper end of the metal cup holder sliding block (14), and the threaded compression cap (4) is threadedly connected with the metal cup holder (15). The adjustable pry plate device comprises a pry plate body (3), a positioning sliding block (6), a draw hook (7), and two positioning nuts (5). The pry plate body (3) is sleeved on the surface of the connecting block (8) through a bolt sleeve, the two positioning nuts (5) are located in the pry plate body (3), and the positioning sliding block (6) and the draw hook (7) are located on the lower side of the pry plate body (3). The pry plate body (3) is marked with scale lines on the surface.

2. An adjustable acetabular lever-out testing device according to claim 1, wherein: The pry plate lifting device drives the threaded lifting rod (12) to realize millimeter-level height fine adjustment by rotating the adjusting nut (9).

3. An adjustable acetabular lever-out testing device according to claim 2, wherein: The position of the draw hook (7) is accurately adjusted by the positioning nut (5) and the scale lines.

4. An adjustable acetabular lever-out testing device according to claim 3, wherein: The eccentric pry base (1), the pry plate lifting device, the acetabular assembly loading device, and the adjustable pry plate device are connected through high-strength bolts to form a modular split structure.

5. An adjustable acetabular lever-out testing device according to claim 4, wherein: The adjusting nut (9) is provided with a net structure to facilitate manual operation.

6. An adjustable acetabular lever-out testing device according to claim 5, wherein: The threaded compression cap (4) cooperates with the metal cup holder (15) to fix acetabular assemblies of different specifications.

7. An adjustable acetabular lever-out testing device according to claim 6, wherein: The position of the draw hook (7) is accurately adjusted by the positioning nut (5) and the scale lines, and the adjustment range is 0-±90mm.

8. An adjustable acetabular lever-out testing device according to claim 7, wherein: ​

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