Adjustable femoral condyle fatigue test fixture

Abstract

The application provides an adjustable femoral condyle fatigue test curing device, and belongs to the technical field of femoral condyle fatigue experiments.The adjustable femoral condyle fatigue test curing device comprises a bottom plate, a stand fixedly connected to the upper end of the bottom plate, a fixed end slidingly connected to the circumferential surface of the stand, and a movable end rotatably connected to the fixed end.The integrated structure provides a highly controllable and stable curing environment for the femoral condyle sample, flexible adjustment of the curing angle is realized through the rotary connection of the movable end, reliable clamping and radial limiting of the sample are realized through the cooperation of the pressing plate device and the positioning groove, the concentration and standardization of the curing process are ensured through the curing container device, and the key problems of poor sample consistency and low experimental data reliability caused by inaccurate positioning and unstable fixation in the prior art are fundamentally solved, thereby laying a solid foundation for the accuracy of subsequent fatigue tests.

Description

Technical Field

[0001] This invention belongs to the field of femoral condyle fatigue testing technology, specifically relating to an adjustable femoral condyle fatigue testing curing device. Background Technology

[0002] The femoral condyle fatigue test refers to the evaluation of changes in its mechanical properties under long-term repeated loading through systematic fatigue loading tests under in vitro conditions. This experimental approach provides a deeper understanding of the fatigue behavior of the femoral condyle, offering a scientific basis for clinical practice.

[0003] Most existing devices lack precise positioning and angle adjustment mechanisms. Operators often rely on experience and visual inspection to place samples, making it difficult to accurately control the inversion / extension angle, flexion / extension angle, and curing depth of the femoral neck in the curing medium. This human uncertainty leads to differences in specimens prepared from different batches, seriously affecting the comparability and repeatability of fatigue test data. Femoral condyle products from different manufacturers and of different models have significant differences in size and morphological structure. Existing curing fixtures are usually dedicated to specific products and lack adaptability. Designing and manufacturing fixtures separately for each product is costly, time-consuming, and inconvenient to manage. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable femoral condyle fatigue testing curing device, aiming to solve the problems of existing technologies that mostly lack precise positioning and angle adjustment mechanisms. Operators often rely on experience and visual inspection to place samples, making it difficult to accurately control the inversion / extension angle, flexion / extension angle, and curing depth of the femoral neck in the curing medium. This human uncertainty leads to differences in specimens prepared from different batches, seriously affecting the comparability and repeatability of fatigue test data. Femoral condyle products from different manufacturers and of different models have significant differences in size and morphological structure. Existing curing fixtures are usually dedicated to specific products, lacking adaptability. Designing and manufacturing fixtures individually for each product is costly, time-consuming, and inconvenient to manage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An adjustable femoral condyle fatigue testing curing device, comprising: Base plate; The column is fixedly connected to the upper end of the base plate; The fixed end is slidably connected to the circumferential surface of the column; The movable end is rotatably connected to the fixed end; A lower pressure plate, which is located at the upper end of the movable end; An upper pressure plate, which is located above the lower pressure plate; Bolt A, which is threaded into the movable end, and the upper pressure plate and the lower pressure plate are both sleeved on the surface of bolt A; A cured base plate, wherein the cured base plate is located at the upper end of the base plate; A curing barrel, located at the upper end of a curing base plate; A positioning groove, which begins on one side of the lower pressure plate; A femoral condyle model, wherein the femoral condyle model is constrained by a positioning groove and is located between an upper pressure plate and a lower pressure plate.

[0006] As a preferred embodiment of the present invention, both the curing barrel and the curing base plate have threaded grooves on one side, and are bound together by positioning bolts.

[0007] As a preferred embodiment of the present invention, the upper pressure plate and the lower pressure plate are threadedly connected by bolt B.

[0008] As a preferred embodiment of the present invention, the four sides of the curing base plate are provided with scales, and the surface of the fixed end is provided with scales from 0° to 360°.

[0009] As a preferred embodiment of the present invention, a positioning screw hole is provided on the other side of the fixed end, and it is fixed by a rivet.

[0010] As a preferred embodiment of the present invention, the base plate is provided with three positioning lines, which are used to cooperate with the scale on the solidified base plate to achieve precise positioning.

[0011] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up an adjustable clamping mechanism consisting of a base plate, column, fixed end, movable end, upper pressure plate, lower pressure plate, and bolt A, and cooperating with a curing container device consisting of a curing base plate and a curing barrel, multi-degree-of-freedom precise positioning and stable fixation of the bone model is achieved. The integrated structure provides a highly controllable and stable curing environment for the femoral condyle sample. The rotational connection of the movable end enables flexible adjustment of the curing angle. The cooperation between the pressure plate device and the positioning groove enables reliable clamping and radial limiting of the sample. The curing container device ensures the concentration and standardization of the curing process. This fundamentally solves the key problems of poor sample consistency and low reliability of experimental data caused by inaccurate positioning and unstable fixation in the existing technology, laying a solid foundation for the accuracy of subsequent fatigue tests.

[0012] 2. First, the curing barrel and curing base plate are connected via threaded grooves and positioning bolts, and the base plate and base plate are connected via scale lines and positioning lines, forming a dual positioning system. This significantly improves the positional accuracy and repeatability of the curing container itself and its connection to the main frame. Second, the 0°-360° scale lines on the fixed end surface, in conjunction with the movable end, allow for precise quantitative control of the angle adjustment, transforming rough estimation into precise quantitative control and ensuring a high degree of consistency in the curing angle between different samples. Furthermore, the upper and lower pressure plates are connected by bolt B, enhancing the uniformity and stability of the clamping force; and the conical inner hole design of the curing barrel facilitates the removal of cured samples, enabling the reuse of the curing container and effectively reducing the cost per test. Attached Figure Description

[0013] 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: Figure 1 This is a first-view perspective perspective view of the present invention; Figure 2 This is an exploded view of the fixed end and the movable end in this invention; Figure 3 This is a second-view perspective perspective view of the present invention; Figure 4 This is an exploded view of the curing barrel and curing base plate structure in this invention.

[0014] In the diagram: 1. Base plate; 2. Column; 3. Fixed end; 4. Movable end; 5. Upper pressure plate; 6. Lower pressure plate; 7. Bolt A; 8. Bolt B; 9. Femoral condyle model; 10. Curing bucket; 11. Positioning groove; 12. Curing base plate. Detailed Implementation

[0015] 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.

[0016] Example 1

[0017] Please see Figures 1-4 The present invention provides the following technical solutions: An adjustable femoral condyle fatigue testing curing device, comprising: Base plate 1; Column 2 is fixedly connected to the upper end of the base plate 1; Fixed end 3 is slidably connected to the circumferential surface of column 2; Movable end 4 is rotatably connected to fixed end 3; The lower pressure plate 6 is located at the upper end of the movable end 4; Upper pressure plate 5, which is located above the lower pressure plate 6; Bolt A7 is threaded into the movable end 4, and the upper pressure plate 5 and the lower pressure plate 6 are both fitted onto the surface of bolt A7. A curing base plate 12 is located at the upper end of the base plate 1; Positioning groove 11, the positioning groove 11 begins on one side of the lower pressure plate 6; The femoral condyle model 9 is restricted by the positioning groove 11 and is located between the upper pressure plate 5 and the lower pressure plate 6.

[0018] In a specific embodiment of the present invention, the device comprises two columns 2, a fixed end 3, and a movable end 4, and three sets of components: the femoral condyle model 9, the curing bucket 10, and the curing base plate 12. When conducting a femoral condyle fatigue test, the curing base plate 12 is first placed on the base plate 1, and the graduation lines on the base plate 1 are aligned with the graduation lines around the curing base plate 12 to ensure consistent positioning of the curing container. Next, the curing bucket 10 is placed on the curing base plate 12 and fixed with bolts. Then, the femoral condyle model 9 is placed inside the curing bucket 10 and initially positioned using the positioning groove 11, thus initially fixing its position. When adjusting the curing angle of the femoral condyle model 9, the bolts between the fixed end 3 and the column 2 are loosened, the fixed end 3 is slid to the desired height, and then re-locked. Finally, the bolts between the movable end 4 and the fixed end 2 are loosened. The bolts between ends 3 are used to rotate the movable end 4 to the desired angle. The rotation angle is precisely controlled by the scale lines on the fixed end 3. Finally, the bolts are tightened, and the curing angle of the femoral condyle model 9 can be precisely adjusted. When different types of femoral condyle samples need to be fixed, the appropriate lower pressure plate 6 and upper pressure plate 5 can be replaced to match the size of the contact part with the sample. The upper and lower pressure plates are then fastened to the movable end 4 with bolts A7. The device is applicable to various specifications of femoral condyle products. After curing, the inner hole of the curing barrel 10 is conical, which facilitates the removal of the curing medium and enables the reuse of the curing container device. After all adjustments and fixation are completed, fatigue testing can be carried out. The device significantly improves the consistency, applicability and operational efficiency of the test through modular split design, adjustable angle, replaceable pressure plates and precise positioning structure.

[0019] Please refer to the details. Figure 4 Both the curing barrel 10 and the curing base plate 12 have threaded grooves on one side and are bound together by positioning bolts.

[0020] In this embodiment: when it is necessary to assemble the curing container device, the curing barrel 10 is placed on the curing base plate 12, and the threaded grooves on the sides of the two are aligned. Then, the positioning bolts are screwed into the threaded grooves. In this way, the curing barrel 10 and the curing base plate 12 are firmly connected together, preventing displacement during subsequent operations or curing processes and ensuring the stability of the device.

[0021] Please refer to the details. Figure 1 Bolt B8 is threaded between the upper pressure plate 5 and the lower pressure plate 6.

[0022] In this embodiment: after the femoral condyle model 9 is placed in the positioning groove 11 of the lower pressure plate 6, the upper pressure plate 5 is placed over the femoral condyle model 9 so that the corresponding holes of the upper pressure plate 5 and the lower pressure plate 6 are aligned; then the bolt B8 is passed through the through hole and screwed into the threaded hole of the lower pressure plate 6; in this way, by tightening the bolt B8, the upper pressure plate 5 and the lower pressure plate 6 can firmly clamp the femoral condyle model 9 in the middle, preventing it from loosening during curing or testing, and ensuring reliable positioning.

[0023] Please refer to the details. Figure 1 The four sides of the curing base plate 12 are marked with scales, and the surface of the fixed end 3 is marked with scales from 0° to 360°.

[0024] In this embodiment: when the curing container device needs to be placed, the scale around the curing base plate 12 is aligned with the positioning lines on the base plate 1; this ensures that the curing container device is in the same absolute position in each batch of experiments, guaranteeing the consistency of the experimental sample position. When the curing angle needs to be adjusted, the locking bolt of the movable end 4 is loosened, the 0°-360° scale on the surface of the fixed end 3 is observed, the movable end 4 is rotated to the target angle, and then tightened again; this achieves precise and repeatable quantitative control of the curing angle of the femoral condyle model 9, improving the accuracy of the experiment.

[0025] Please refer to the details. Figure 2 The other side of the fixed end 3 has a positioning screw hole, which is fixed by rivets.

[0026] In this embodiment: after the fixed end 3 slides on the column 2 to the required height, a rivet is inserted into the positioning screw hole on the side of the fixed end 3 and tightened; in this way, the relative position between the fixed end 3 and the column 2 is locked with high strength, which can withstand the load during the test without displacement, thus enhancing the structural stability of the entire device in fatigue testing.

[0027] Please refer to the details. Figure 1 The base plate 1 has three positioning lines, which are used to match the scale on the solidified base plate 12 to achieve precise positioning.

[0028] In this embodiment: before placing the curing container device, the scale on the edge of the curing base plate 12 is aligned with the three positioning lines preset on the surface of the base plate 1. This ensures that the curing container device can be quickly and accurately placed in the same predetermined position in each test, eliminating experimental errors caused by placement deviations, ensuring a high degree of consistency in the curing position of different batches of samples, and thus improving the reliability of experimental data.

[0029] The working principle and usage process of this invention are as follows: Insert the two uprights 2 into the holes of the base plate 1 and tighten them with bolts. Place the curing base plate 12 on the base plate 1. Achieve precise positioning by aligning the three positioning lines on the base plate 1 with the scale around the curing base plate 12, and initially fix it with rivets or bolts. Place the curing bucket 10 on the positioned curing base plate 12, and use positioning bolts to pass through the threaded grooves of both to bind the curing bucket 10 and the curing base plate 12, completing the assembly of the curing container device. Loosen the bolts connecting the fixed end 3 and the uprights 2, slide the entire rotating device to the required height position, and then relock it. Tighten the bolts and reinforce with rivets inserted into the positioning screw holes. Loosen the bolts connecting the movable end 4 and the fixed end 3, observe the 0°-360° scale on the surface of the fixed end 3, rotate the movable end 4 to the precise angle required for the experiment, and then tighten the bolts to complete the preset curing angle. According to the model and size of the femoral condyle model 9 to be tested, select the matching upper pressure plate 5 and lower pressure plate 6. Pass the bolt A7 through the through hole of the upper and lower pressure plates and connect it to the threaded hole at the upper end of the movable end 4. Initially install the pressure plate device on the rotating device, place the femoral condyle model 9 into the curing container 10, and adjust the position of the curing container device so that... A specific portion of the sample is inserted into the positioning groove 11 of the lower pressure plate 6, completing the initial radial positioning. The upper pressure plate 5 is then placed over the sample, aligning it with the lower pressure plate 6. A bolt B8 is passed through the through hole of the upper pressure plate 5 and screwed into the threaded hole of the lower pressure plate 6. The bolt B8 is tightened to securely clamp the sample between the upper and lower pressure plates. The position of the curing container is then finely adjusted to ensure that the graduations on the base plate 1 are perfectly aligned with the graduations on the curing base plate 12, achieving precise axial positioning of the sample. Liquid curing medium is then injected into the curing tank 10 until it completely covers the portion of the sample that needs curing. The curing medium is then allowed to completely solidify. Throughout the process, the device remains stable to ensure that the sample does not move or shift at any angle. After curing, the positioning bolts connecting the curing barrel 10 and the curing base plate 12 are unscrewed. Since the curing barrel 10 has a conical inner hole, the cured sample block can be easily removed from the barrel. The curing barrel 10 can be reused after cleaning. The sample that has been removed and precisely cured at the predetermined position and angle is installed on the fatigue testing machine for mechanical property testing. Through the scale lines and adjustable angle mechanism, it is ensured that the curing position and angle of different batches of samples are completely consistent, which greatly improves the comparability and reliability of experimental data.

[0030] 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 femoral condyle fatigue testing and curing device, characterized in that: include: Base plate (1); The column (2) is fixedly connected to the upper end of the base plate (1); Fixed end (3), the fixed end (3) is slidably connected to the circumferential surface of the column (2); The movable end (4) is rotatably connected to the fixed end (3); The lower pressure plate (6) is located at the upper end of the movable end (4); Upper pressure plate (5), which is located at the upper end of lower pressure plate (6); Bolt A (7) is threaded into the movable end (4), and the upper pressure plate (5) and the lower pressure plate (6) are both sleeved on the surface of bolt A (7); A curing base plate (12) is located at the upper end of the base plate (1); A curing barrel (10) is located at the upper end of the curing base plate (12); A positioning groove (11) begins on one side of the lower pressure plate (6); Femoral condyle model (9), which is restricted by positioning groove (11) and located between upper pressure plate (5) and lower pressure plate (6).

2. The adjustable femoral condyle fatigue testing curing device according to claim 1, characterized in that: Both the curing barrel (10) and the curing base plate (12) have threaded grooves on one side and are bound together by positioning bolts.

3. The adjustable femoral condyle fatigue testing curing device according to claim 2, characterized in that: Bolt B (8) is threadedly connected between the upper pressure plate (5) and the lower pressure plate (6).

4. The adjustable femoral condyle fatigue testing curing device according to claim 3, characterized in that: The four sides of the curing base plate (12) are provided with scales, and the surface of the fixed end (3) is provided with scales from 0° to 360°.

5. The adjustable femoral condyle fatigue testing curing device according to claim 4, characterized in that: The other side of the fixed end (3) is provided with a positioning screw hole, which is fixed by rivets.

6. The adjustable femoral condyle fatigue testing curing device according to claim 5, characterized in that: The base plate (1) is provided with three positioning lines, which are used to cooperate with the scale on the solidified base plate (12) to achieve precise positioning.

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