Combined acetabular component mechanical performance verification device

Abstract

This utility model belongs to the field of medical device testing technology and discloses a mechanical performance verification device for a combined acetabular component. It includes a mounting base, a testing component, and a clamping and positioning mechanism. The testing component is mounted on the mounting base. The clamping and positioning mechanism includes an electric push rod and a U-shaped lifting frame. The upper end of the U-shaped lifting frame slides through the top of the mounting base. Both ends of the upper part of the U-shaped lifting frame are equipped with clamping components that can adjust the clamping distance according to the diameter of the combined acetabular component. The top of the mounting base is equipped with a positioning component that can fully limit the arc-shaped bottom of the combined acetabular component. The positioning component is located between the two clamping components. This utility model, through its clamping components, can adjust the clamping distance according to the diameter of the combined acetabular component. The positioning component can limit the arc-shaped bottom of components of different sizes, adapting to various specifications of combined acetabular components and improving the versatility of the device.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment testing technology, and in particular to a combined acetabular component mechanical performance verification device. Background Technology

[0002] Total hip arthroplasty is an effective treatment for hip joint diseases, and its core lies in the design and performance of the acetabular components. Modular acetabular components typically consist of a metal cup, a liner (such as ultra-high molecular weight polyethylene or ceramic materials), and fixing screws. Their mechanical properties directly affect the surgical outcome and the lifespan of the implant. To ensure clinical safety, rigorous mechanical performance verification tests are required to simulate the complex load environment of the human hip joint during activities such as walking and standing.

[0003] Chinese utility model patent CN222393894U discloses a combined acetabular component separation force testing device, including a mounting box, a positioning assembly, and a testing assembly. The mounting box has a mounting cavity. The positioning assembly includes one end of a telescopic rod disposed within the mounting cavity, a clamping plate passing through the top wall of the mounting cavity, an arc-shaped positioning groove in the top wall of the mounting box, and a recessed positioning groove on the clamping plate. The testing assembly includes an L-shaped mounting frame inside the mounting box, a guide rail on the L-shaped mounting frame, and a tension / compression testing mechanism and a torsion testing mechanism on the guide rail. Through the integrated design of the tension / compression and torsion testing mechanisms, this device can complete separation force, tension / compression, and torsion tests on a single device, improving testing convenience. The guide rail allows for flexible installation or removal of the testing mechanisms, and multiple sets of tests can be conducted simultaneously by configuring multiple sets of testing mechanisms.

[0004] However, this device still has the following shortcomings in practical applications:

[0005] The positioning component lacks diameter adaptive adjustment: it cannot adapt to acetabular components of different sizes;

[0006] Incomplete limiting of the arc-shaped positioning groove: During the eccentric tensile test, the bottom of the acetabular component is only supported by a single point through the arc-shaped positioning groove, and there is a lack of constraints around it, which makes it easy for the clamping plate to shift when it is pressed down, resulting in insufficient fixation stability.

[0007] To this end, we propose a combined acetabular component mechanical performance verification device. Utility Model Content

[0008] The purpose of this invention is to provide a combined acetabular component mechanical performance verification device, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] A mechanical performance verification device for a combined acetabular component includes a mounting base, a detection component, and a clamping and positioning mechanism. The detection component is mounted on the mounting base. The clamping and positioning mechanism includes an electric push rod and a U-shaped lifting frame. The mounting base is hollow. The electric push rod is fixedly mounted on the inner bottom of the mounting base. The lower end of the U-shaped lifting frame is located inside the mounting base. The top of the piston rod of the electric push rod is fixedly connected to the bottom of the U-shaped lifting frame. The upper end of the U-shaped lifting frame slides through the top of the mounting base. Both ends of the upper part of the U-shaped lifting frame are provided with clamping components that can adjust the clamping distance according to the diameter of the combined acetabular component. The top of the mounting base is equipped with a positioning component that can fully limit the arc-shaped bottom of the combined acetabular component. The positioning component is located between the two clamping components.

[0011] In a combined acetabular component mechanical performance verification device according to the present invention, the positioning component includes a three-jaw chuck, which is fixedly installed on the top of the mounting base, and positioning inclined plates are fixedly installed on the three jaws of the three-jaw chuck.

[0012] In a combined acetabular component mechanical performance verification device according to the present invention, a first anti-slip rubber pad is fixedly bonded to the surface of the positioning inclined plate.

[0013] In a combined acetabular component mechanical performance verification device according to the present invention, the clamping assembly includes a screw and a connecting plate. A nut is fixedly welded to the upper end of the U-shaped lifting frame. One end of the screw is threaded through the nut and extends into the inner side of the U-shaped lifting frame to be rotatably connected to one side of the connecting plate. A support plate is fixedly welded to the bottom of the connecting plate.

[0014] In a combined acetabular component mechanical performance verification device according to the present invention, a second anti-slip rubber pad is fixedly bonded to both the top and bottom of the support plate.

[0015] In a combined acetabular component mechanical performance verification device according to the present invention, a rotating handle is fixedly connected to the end of the screw away from the connecting plate.

[0016] In a combined acetabular component mechanical performance verification device according to the present invention, a guide rod is fixedly connected to one side of the connecting plate, a guide sleeve is fixedly welded to the upper end of the U-shaped lifting frame, and the end of the guide rod away from the connecting plate slides through the interior of the guide sleeve.

[0017] This utility model has at least the following beneficial effects:

[0018] This invention features a clamping assembly that allows for adjustment of the clamping distance based on the diameter of the combined acetabular component, and a positioning assembly that limits the arc-shaped bottom of components of different sizes. This adapts to various specifications of combined acetabular components and improves the versatility of the device. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the mechanical performance verification device for the combined acetabular component of this utility model.

[0021] Figure 2 This is a partial cross-sectional structural diagram of the combined acetabular component mechanical performance verification device of this utility model;

[0022] Figure 3 This is a schematic diagram of the clamping and positioning mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the clamping and positioning mechanism of this utility model when performing a pressure test on a combined acetabular component.

[0024] Figure 5 This is a schematic diagram of the clamping and positioning mechanism of this utility model when performing torque separation or eccentric pull-out force tests on the combined acetabular components.

[0025] Explanation of icon numbers:

[0026] 1. Mounting base; 2. Detection component; 3. Clamping and positioning mechanism; 301. Electric push rod; 302. U-shaped lifting frame; 303. Clamping component; 3031. Screw; 3032. Connecting plate; 3033. Support plate; 3034. Guide rod; 3035. Guide sleeve; 3036. Nut; 3037. Rotating handle; 304. Positioning component; 3041. Three-jaw chuck; 3042. Positioning ramp; 4. Display screen. Detailed Implementation

[0027] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] Please refer to Figures 1 to 5As shown, an embodiment of this utility model provides a mechanical performance verification device for a combined acetabular component, including a mounting base 1, a detection component 2, and a clamping and positioning mechanism 3. The detection component 2 is mounted on the mounting base 1. The clamping and positioning mechanism 3 includes an electric push rod 301 and a U-shaped lifting frame 302. The mounting base 1 is hollow. The electric push rod 301 is fixedly mounted on the inner bottom of the mounting base 1. The lower end of the U-shaped lifting frame 302 is located inside the mounting base 1. The top of the piston rod of the electric push rod 301 is fixedly connected to the bottom of the U-shaped lifting frame 302. The upper end of the U-shaped lifting frame 302 slides through the top of the mounting base 1. Both ends of the upper part of the U-shaped lifting frame 302 are provided with clamping components 303 that can adjust the clamping distance according to the diameter of the combined acetabular component. The top of the mounting base 1 is equipped with a positioning component 304 that can fully limit the arc-shaped bottom of the combined acetabular component. The positioning component 304 is located between the two clamping components 303.

[0029] Working principle: The piston rod of the electric push rod 301 extends and retracts, causing the connected U-shaped lifting frame 302 to slide up and down along the through hole at the top of the mounting base 1, thereby adjusting the height of the clamping assembly 303. By adjusting the clamping distance of the clamping assembly 303, it can accommodate combined acetabular components of different diameters. The positioning assembly 304 fully limits the arc-shaped bottom of the combined acetabular component to prevent it from shifting during testing. The detection assembly 2 is installed on the mounting base 1 and can perform mechanical performance testing on the clamped and positioned combined acetabular component. It should be noted that the detection assembly 2 in this embodiment has the same structure and working principle as the detection assembly in the combined acetabular component separation force testing device disclosed in Chinese Utility Model Patent No. CN222393894U, and will not be described in detail here.

[0030] In this embodiment, the positioning component 304 includes a three-jaw chuck 3041, which is fixedly mounted on the top of the mounting base 1. Positioning ramps 3042 are fixedly mounted on each of the three jaws of the three-jaw chuck 3041. When the three-jaw chuck 3041 is working, its three jaws move radially synchronously. By rotating the adjustment mechanism of the three-jaw chuck 3041, the jaws drive the positioning ramps 3042 closer to or further away from the arc-shaped bottom of the combined acetabular component. When the jaws move to the appropriate position, the positioning ramps 3042 contact and limit the arc-shaped bottom of the combined acetabular component, thereby achieving positioning of the bottom of combined acetabular components of different sizes.

[0031] The positioning ramp 3042 has a first anti-slip rubber pad fixedly bonded to its surface. This first anti-slip rubber pad increases the friction between the positioning ramp 3042 and the arc-shaped bottom of the combined acetabular component. When the positioning ramp 3042 contacts the combined acetabular component and a limiting force is applied, the anti-slip rubber pad can prevent the component from sliding due to force during testing, further improving the stability of positioning.

[0032] In this embodiment, the clamping assembly 303 includes a screw 3031 and a connecting plate 3032. A nut 3036 is fixedly welded to the upper end of the U-shaped lifting frame 302. One end of the screw 3031 is threaded through the nut 3036 and extends into the inner side of the U-shaped lifting frame 302, where it is rotatably connected to one side of the connecting plate 3032. A support plate 3033 is fixedly welded to the bottom of the connecting plate 3032. A guide rod 3034 is fixedly connected to one side of the connecting plate 3032. A guide sleeve 3035 is fixedly welded to the upper end of the U-shaped lifting frame 302. The end of the guide rod 3034 away from the connecting plate 3032 slides through the interior of the guide sleeve 3035.

[0033] In use, by rotating the screw 3031, since the screw 3031 and the nut 3036 form a threaded transmission pair, the screw 3031 will move axially within the nut 3036. The axial movement of the screw 3031 drives the connecting plate 3032, which is rotatably connected to it, to move, thereby causing the support plate 3033 to move closer to or further away from the combined acetabular component. This achieves the function of adjusting the clamping distance according to the component diameter. The guide rod 3034 and guide sleeve 3035 ensure the smoothness and accuracy of the movement of the connecting plate 3032 and the support plate 3033, making the clamping process more reliable.

[0034] The support plate 3033 has a second anti-slip rubber pad fixedly bonded to both its top and bottom. The second anti-slip rubber pad increases the friction between the support plate 3033 and the combined acetabular component. When the support plate 3033 supports or presses the combined acetabular component, the anti-slip rubber pad prevents the component from sliding, ensuring the stability of the clamping and making the component position accurately fixed during the test.

[0035] In this embodiment, a rotating handle 3037 is fixedly connected to the end of the screw 3031 away from the connecting plate 3032. The rotating handle 3037 provides an easy point for the operator to apply force. By rotating the rotating handle 3037, the operator can easily drive the screw 3031 to rotate, thereby making it easier to adjust the clamping distance of the clamping assembly 303 and improving the convenience of operation.

[0036] In this embodiment, a display screen 4 is fixedly installed on the mounting bracket of the detection component 2 to display the current values ​​of the tension and compression sensors and torque sensors in the detection component 2, so as to facilitate the operator to understand the current test data in real time.

[0037] Working principle:

[0038] When it is necessary to conduct an axial separation force test on the combined acetabular component, the distance between the two support plates 3033 is adjusted by rotating the rotating handle 3037 according to the diameter of the combined acetabular component. Then, the combined acetabular component is placed arc-shaped upward between the two support plates 3033, and then the axial separation test is conducted on the combined acetabular component through the detection component 2.

[0039] When a torque or eccentric pull-out force test is required on the combined acetabular component, the component is placed on the positioning assembly 304. The three-jaw chuck 3041 is operated to bring the positioning ramp 3042 close to the arc-shaped bottom of the component, thus fully limiting its position. By rotating the rotary handle 3037, the support plate 3033 is moved to the upper edge of the combined acetabular component. The electric push rod 301 is activated, and the piston rod extends and retracts, causing the U-shaped lifting frame 302 to move downward, so that the support plate 3033 applies downward pressure to the combined acetabular component, thus fixing it in place. Then, the testing assembly 2 can be used to perform relevant mechanical performance tests on the combined acetabular component.

[0040] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A combined acetabular component mechanical performance verification device, characterized in that, The device includes a mounting base (1), a detection component (2), and a clamping and positioning mechanism (3). The detection component (2) is mounted on the mounting base (1). The clamping and positioning mechanism (3) includes an electric push rod (301) and a U-shaped lifting frame (302). The mounting base (1) is hollow. The electric push rod (301) is fixedly installed on the inner bottom of the mounting base (1). The lower end of the U-shaped lifting frame (302) is located inside the mounting base (1). The top of the piston rod of the electric push rod (301) is connected to the U-shaped lifting frame. The bottom of the lifting frame (302) is fixedly connected, and the upper end of the U-shaped lifting frame (302) slides through the top of the mounting base (1). Both ends of the upper part of the U-shaped lifting frame (302) are provided with clamping components (303) that can adjust the clamping distance according to the diameter of the combined acetabular component. The top of the mounting base (1) is provided with a positioning component (304) that can fully limit the arc-shaped bottom of the combined acetabular component. The positioning component (304) is located between the two clamping components (303). The positioning component (304) includes a three-jaw chuck (3041), which is fixedly installed on the top of the mounting base (1), and positioning inclined plates (3042) are fixedly installed on the three jaws of the three-jaw chuck (3041). The clamping assembly (303) includes a screw (3031) and a connecting plate (3032). A nut (3036) is fixedly welded to the upper end of the U-shaped lifting frame (302). One end of the screw (3031) is threaded through the nut (3036) and extends into the inner side of the U-shaped lifting frame (302) to be rotatably connected to one side of the connecting plate (3032). A support plate (3033) is fixedly welded to the bottom of the connecting plate (3032).

2. The combined acetabular component mechanical validation device of claim 1, wherein: The surface of the positioning inclined plate (3042) is fixedly bonded with a first anti-slip rubber pad.

3. The combined acetabular component mechanical validation device of claim 1, wherein: The top and bottom of the support plate (3033) are both fixedly bonded with a second anti-slip rubber pad.

4. The combined acetabular component mechanical validation device of claim 1, wherein: A rotating handle (3037) is fixedly connected to the end of the screw (3031) away from the connecting plate (3032).

5. The combined acetabular component mechanical validation device of claim 4, wherein: A guide rod (3034) is fixedly connected to one side of the connecting plate (3032), and a guide sleeve (3035) is fixedly welded to the upper end of the U-shaped lifting frame (302). The end of the guide rod (3034) away from the connecting plate (3032) slides through the interior of the guide sleeve (3035).

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