Miniature mechanical testing machine for orthopedic experiment research
By designing a miniature mechanical testing machine, the problems of large size, complex operation, and difficulty in fixing irregular bone samples in existing equipment have been solved. This has enabled convenient, stable, and accurate testing of bone mechanical properties and provided efficient experimental data support.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-20
AI Technical Summary
Existing mechanical testing machines are bulky and cumbersome to operate, making it difficult to stably and accurately fix irregularly shaped bone samples, resulting in large deviations in test results and failing to meet the requirements of fine mechanical data measurement in orthopedic experiments.
A miniature mechanical testing machine was designed, comprising a base, a U-shaped frame, a pressure component, an adjustment component, and a clamping box. Utilizing components such as cylinders, a moving plate, a pressure sensor, a clamping plate, and locking elements, it achieves stable clamping and precise measurement of bone samples. The design of springs and limit blocks ensures the stability and accuracy of clamping.
It enables convenient and flexible experimental operation, improves experimental efficiency, ensures the stability and accuracy of clamping, provides precise pressure measurement and data display, and enhances the accuracy of test results.
Smart Images
Figure CN224019503U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical testing machine technology, and more specifically, to a miniature mechanical testing machine for orthopedic experimental research. Background Technology
[0002] In the field of orthopedic experimental research, accurate testing of bone biomechanical properties is a crucial step in gaining a deeper understanding of bone physiological characteristics, disease mechanisms, and developing novel treatments and medical devices. Currently, existing biomechanical testing equipment has many limitations when applied to orthopedic experiments.
[0003] Some traditional mechanical testing machines are bulky and complex, occupying a significant amount of laboratory space and requiring cumbersome operation, including setup and maintenance by specialized technicians. This makes them prohibitively expensive and inflexible for small laboratories with limited resources or research teams focused on specific subfields of orthopedics. Furthermore, the precision of these devices often falls short of the measurement requirements for small samples or fine mechanical data in orthopedic experiments, failing to accurately reflect the mechanical changes of bones under different physiological and pathological conditions.
[0004] Some existing mechanical testing protocols for orthopedic experiments have shortcomings in specimen clamping and fixation. They struggle to stably and accurately fix irregularly shaped bone samples, and are prone to sample displacement and wobbling during testing, leading to significant deviations in test results and failing to provide reliable data support for scientific research. Furthermore, current technologies are not intelligent enough in terms of pressure application and data acquisition, unable to monitor and record various mechanical parameters of the bone in real time and comprehensively during stress, thus limiting researchers' in-depth study of bone mechanical properties. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a miniature mechanical testing machine for orthopedic experimental research, which aims to improve the problem of unstable and inaccurate fixation of irregularly shaped bone samples, and the problems of sample displacement and shaking that easily occur during the testing process, resulting in large deviations in test results and failing to provide reliable data support for scientific research.
[0006] This utility model is implemented as follows: A miniature mechanical testing machine for orthopedic experimental research includes a base, a U-shaped frame fixedly installed at the top of the base, a pressure component installed on the U-shaped frame, vertical plates symmetrically slidably installed at the top of the base, an adjustment component installed on the vertical plates, a clamping box fixedly installed at the top of the vertical plates, a partition plate fixedly installed on one side of the clamping box via a support rod, multiple springs fixedly installed on one side of the partition plate, a clamping plate fixedly installed at one end of each spring, one end of the clamping plate penetrating through one side of the clamping box and extending to the outside, a first guide rod fixedly installed at the other end of the clamping plate, one end of the first guide rod slidably penetrating through the other side of the clamping box and equipped with a locking component.
[0007] In a preferred embodiment of this utility model, the pressure assembly includes a cylinder, a movable plate, and a pressure sensor. The cylinder is fixedly installed at the top of the U-shaped frame, and the output end of the cylinder passes through the top of the U-shaped frame and is fixedly installed on the movable plate. The pressure sensor is fixedly installed at the bottom of the movable plate, and a pressure plate is installed at the bottom of the pressure sensor. A display is fixedly installed on one side of the top of the inner wall of the U-shaped frame, and the display is electrically connected to the pressure sensor. The cylinder is located at the center of the U-shaped frame.
[0008] In a preferred embodiment of this utility model, a second guide rod is symmetrically fixedly installed at the top of the movable plate, and the top of the second guide rod slides through the U-shaped frame and extends to the outside.
[0009] In a preferred embodiment of this utility model, the adjustment assembly includes a bidirectional threaded rod, a guide frame, and a first motor. The guide frame is fixedly installed on one side of the top of the base, and the bidirectional threaded rod is rotatably installed between the two sides of the inner wall of the guide frame. The first motor is fixedly installed at one end of the bidirectional threaded rod, and a horizontal plate is symmetrically threaded on the bidirectional threaded rod. One end of the horizontal plate is fixedly connected to one side of the vertical plate.
[0010] In a preferred embodiment of this utility model, the base is symmetrically provided with strip-shaped holes, a guide plate is fixedly installed between the two sides of the inner wall of the strip-shaped holes, the vertical plate is slidably installed on the guide plate, and the vertical plate is slidably connected to the inner wall of the strip-shaped holes.
[0011] In a preferred embodiment of this utility model, a plurality of clamping plates are arranged at equal intervals within the clamping box, and one end of each clamping plate is provided with an arc-shaped clamping groove.
[0012] In a preferred embodiment of this utility model, limiting blocks are symmetrically fixedly installed on both sides of the clamping plate. The limiting blocks are T-shaped. Limiting grooves matching the limiting blocks are provided on both sides of the inner wall of the clamping box. The limiting blocks are slidably connected to the inner wall of the limiting grooves.
[0013] In a preferred embodiment of this utility model, the locking component includes a first bracket, a first threaded rod, and a second bracket. The first bracket is symmetrically fixedly installed on both sides of the clamping box. The first bracket is U-shaped and the first threaded rod is rotatably installed between its inner wall and the clamping box. Two first threaded rods are symmetrically arranged and fixedly connected by a rotating shaft. The second bracket is threadedly installed on the first threaded rod. The second bracket is also U-shaped and a clamping strip is symmetrically fixedly installed on one open end. The clamping strip is provided with a clamping groove that matches the support rod. A second motor is fixedly installed on one end of one of the first threaded rods, and one end of the second bracket slides through the clamping box.
[0014] The beneficial effects of this utility model are:
[0015] Convenient and flexible experimental operation: This miniature mechanical testing machine has a compact structure, and the design of the base and U-shaped frame makes it space-saving and easy to set up in various laboratories. The bidirectional threaded rod, guide frame and first motor in the adjustment assembly can easily adjust the position of the vertical plate and clamping box to adapt to the testing needs of bone models of different sizes. The operation is simple and quick, without complicated debugging steps, which improves experimental efficiency.
[0016] Stable and precise clamping effect: Multiple clamping plates with arc-shaped clamping grooves arranged equidistantly inside the clamping box, combined with the elasticity of springs, can closely conform to the surface of the bone model, forming a stable clamping surface, which can firmly fix even irregularly shaped bone samples. The T-shaped limiting blocks on both sides of the clamping plates cooperate with the limiting grooves on the inner wall of the clamping box to effectively prevent the clamping plates from rotating, further ensuring the stability and precision of clamping, and reducing the impact of sample displacement on the results during testing.
[0017] Precise pressure measurement and data display: The cylinder, moving plate, pressure sensor, and pressure plate in the pressure assembly work together. The cylinder provides a stable pressure output, and the pressure sensor accurately measures the pressure applied to the bone model by the pressure plate, transmitting the data to the display in real time. Researchers can intuitively and accurately obtain pressure data, facilitating timely analysis and recording, and providing a reliable basis for studying bone biomechanical properties.
[0018] Efficient fixing and fine-tuning functions: The locking mechanism, through the cooperation of the first bracket, the first threaded rod, the second bracket, and the clamping strip, can firmly fix the first guide rod, preventing the clamping plate from moving during testing and enhancing the stability of the overall structure. Furthermore, after fixing the skeletal model, the position of the vertical plate can be fine-tuned again to ensure the skeletal model is in the optimal testing state, further improving the accuracy of the test results. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This utility model provides a schematic diagram of the structure of a miniature mechanical testing machine for orthopedic experimental research.
[0021] Figure 2 A structural schematic diagram of the pressure assembly is provided for embodiments of this utility model;
[0022] Figure 3 A schematic diagram of the clamping box is provided for the embodiments of this utility model;
[0023] Figure 4 A schematic diagram of the internal structure of the clamping box is provided for the embodiments of this utility model;
[0024] Figure 5 A structural schematic diagram of the locking component is provided for the embodiments of this utility model.
[0025] In the diagram: 110-base; 111-U-shaped frame; 112-cylinder; 113-moving plate; 114-pressure sensor; 120-vertical plate; 121-bidirectional threaded rod; 122-guide frame; 123-first motor; 130-clamping box; 131-support rod; 132-partition; 133-spring; 134-clamping plate; 135-first guide rod; 136-limiting block; 140-first bracket; 141-first threaded rod; 142-second bracket; 143-clamping strip; 144-second motor. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0027] Please see Figures 1-4 The present invention provides a technical solution: a miniature mechanical testing machine for orthopedic experimental research, comprising a base 110, a U-shaped frame 111 fixedly installed at the top of the base 110, a pressure component installed on the U-shaped frame 111, a vertical plate 120 symmetrically slidably installed at the top of the base 110, an adjustment component installed on the vertical plate 120, a clamping box 130 fixedly installed at the top of the vertical plate 120, a partition 132 fixedly installed on one side of the clamping box 130 via a support rod 131, a plurality of springs 133 fixedly installed on one side of the partition 132, a clamping plate 134 fixedly installed at one end of each spring 133, one end of the clamping plate 134 penetrating through one side of the clamping box 130 and extending to the outside, and a first guide rod 135 fixedly installed at the other end of the clamping plate 134, one end of the first guide rod 135 slidably penetrating through the other side of the clamping box 130 and fitted with a locking component.
[0028] In some specific implementations, the pressure assembly includes a cylinder 112, a movable plate 113, and a pressure sensor 114. The cylinder 112 is fixedly mounted at the top of the U-shaped frame 111. The output end of the cylinder 112 passes through the top of the U-shaped frame 111 and is fixedly mounted on the movable plate 113. The pressure sensor 114 is fixedly mounted at the bottom of the movable plate 113, and a pressure plate is mounted at the bottom of the pressure sensor 114. A display is fixedly mounted on one side of the top inner wall of the U-shaped frame 111, and the display is electrically connected to the pressure sensor 114. The cylinder 112 is located at the center of the U-shaped frame 111. The pressure sensor 114, mounted at the bottom of the movable plate 113, can accurately measure pressure and transmit the data in real time to the display on the top inner wall of the U-shaped frame 111. Researchers can intuitively obtain pressure data through the display, facilitating real-time monitoring of changes in the mechanical properties of the bone model during compression, providing accurate data support for orthopedic experimental research. For example, in experiments studying the impact of different fracture fixation methods on bone compressive strength, the pressure values borne by the bone at different stages can be clearly seen, providing a basis for evaluating the effectiveness of the fixation method.
[0029] In some specific implementations, a second guide rod is symmetrically fixedly mounted on the top of the movable plate 113. The top of the second guide rod slides through the U-shaped frame 111 and extends to the outside. The second guide rod serves to guide and stabilize, ensuring that the movable plate 113 moves smoothly and vertically downwards. This avoids swaying or shifting of the movable plate 113 during movement, ensuring that the pressure plate can accurately apply pressure to the bone model, thus improving the accuracy and reliability of the test results. For example, in experiments simulating the daily stress on human bones, a stable pressure application process can more realistically reflect the mechanical response of the bones.
[0030] Please see Figure 2 The adjustment assembly includes a bidirectional threaded rod 121, a guide frame 122, and a first motor 123. The guide frame 122 is fixedly mounted on one side of the top of the base 110. The bidirectional threaded rod 121 is rotatably mounted between the two sides of the inner wall of the guide frame 122. The first motor 123 is fixedly mounted on one end of the bidirectional threaded rod 121. A horizontal plate is symmetrically threaded onto the bidirectional threaded rod 121, and one end of the horizontal plate is fixedly connected to one side of the vertical plate 120. This allows the device to quickly and accurately adjust the clamping position according to the size of different bone models, improving the device's versatility and flexibility. For example, when testing bone samples of different sizes from children and adults, it can be easily adjusted to adapt to different samples, meeting diverse experimental needs.
[0031] In some specific implementations, the base 110 has symmetrically arranged strip-shaped holes, and guide plates are fixedly installed between the two sides of the inner wall of the strip-shaped holes. The vertical plate 120 is slidably mounted on the guide plates, and the vertical plate 120 is slidably connected to the inner wall of the strip-shaped holes. The guide plates provide a stable track for the sliding of the vertical plate 120, ensuring that the vertical plate 120 moves linearly during adjustment and preventing deviation. At the same time, it enhances the stability of the installation of the vertical plate 120, and can effectively reduce the vibration of the vertical plate 120 when the equipment is running and pressure is applied to the skeletal model. For example, in high-frequency pressure testing experiments, a stable vertical plate can ensure the positional accuracy of the skeletal model during each test, improving the quality of the test data.
[0032] Please see Figures 3-5 Multiple clamping plates 134 are arranged at equal intervals inside the clamping box 130. One end of each clamping plate 134 is provided with an arc-shaped clamping groove. Limiting blocks 136 are symmetrically fixedly installed on both sides of the clamping plate 134. The limiting blocks 136 are T-shaped. Limiting grooves matching the limiting blocks 136 are provided on both sides of the inner wall of the clamping box 130. The limiting blocks 136 are slidably connected to the inner wall of the limiting grooves.
[0033] In some specific implementations, the locking mechanism includes a first bracket 140, a first threaded rod 141, and a second bracket 142. The first bracket 140 is symmetrically fixedly mounted on both sides of the clamping box 130. The first bracket 140 is U-shaped, and the first threaded rod 141 is rotatably mounted between its inner wall and the clamping box 130. The two first threaded rods 141 are symmetrically arranged and fixedly connected by a pivot. The second bracket 142 is threaded onto the first threaded rod 141. The second bracket 142 is also U-shaped, and a clamping strip 143 is symmetrically fixedly mounted on its open end. The clamping strip 143 has a clamping groove that matches the support rod 131. A second motor 144 is fixedly mounted on one end of one of the first threaded rods 141, and one end of the second bracket 142 slides through the clamping box 130. After clamping the skeletal model, this design can further lock the position of the clamping plate 134, preventing the clamping plate 134 from moving due to force during pressure testing. For example, during high-intensity pressure testing, it can effectively enhance the stability of the clamping structure, providing a reliable fixation guarantee for accurate measurement of bone mechanical properties.
[0034] Working principle: First, place the skeletal model required for the experiment on the base 110 to ensure that the model is placed stably, providing a stable foundation for subsequent operations.
[0035] Adjusting the vertical plate and clamping box: Start the first motor 123, which drives the bidirectional threaded rod 121 to rotate. A horizontal plate is symmetrically threaded onto the bidirectional threaded rod 121, and the horizontal plate is fixedly connected to one side of the vertical plate 120. Therefore, when the bidirectional threaded rod 121 rotates, it drives the horizontal plate to move, thereby causing the vertical plate 120 to slide symmetrically on the base 110. When the vertical plate 120 moves, the clamping box 130 mounted at its top moves accordingly, thereby adjusting the distance between the two clamping boxes 130.
[0036] Clamping the bone model: The movement of the clamping box 130 causes the clamping plate 134 to move. When the clamping plate 134 contacts the bone model, further pushing of the clamping plate 134 will compress it, thereby squeezing the spring 133. The elastic force generated by the spring 133 makes the clamping plate 134 fit tightly against the surface of the bone model, forming a clamping surface that matches the bone, thus achieving stable clamping of the bone model. The limiting blocks 136, which are symmetrically fixed on both sides of the clamping plate 134, slide within the limiting grooves on both sides of the inner wall of the clamping box 130, serving to guide and prevent the clamping plate 134 from rotating, ensuring the clamping effect.
[0037] Fixed clamping plate: The second motor 144 is turned on, and the second motor 144 drives the first threaded rod 141 to rotate. Since the two first threaded rods 141 are fixedly connected by a rotating shaft and are symmetrically arranged, they rotate synchronously. When the first threaded rod 141 rotates, the second bracket 142 threaded on it will move along the axial direction of the first threaded rod 141. The second bracket 142 slides and drives the clamping bar 143 to tightly clamp the support rod 131, thereby clamping and fixing the first guide rod 135 and preventing the clamping plate 134 from moving during the test.
[0038] Readjust and fix the vertical plate: Check the clamping status of the skeleton model. If necessary, restart the first motor 123, fine-tune the position of the vertical plate 120 to put the skeleton model in the optimal test position, and then turn off the first motor 123 to complete the fixation operation of the skeleton model and prepare for mechanical testing.
[0039] Finally, the cylinder 112 is activated to move the moving plate 113 downward. The downward movement of the moving plate 113 causes the pressure sensor 114 and the pressure plate to move downward to view the skeletal model from the side. At the same time, the pressure sensor 114 will display the data on the monitor in real time.
[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A miniature mechanical testing machine for orthopedic experimental research, characterized in that, The device includes a base, a U-shaped frame fixedly mounted on the top of the base, a pressure component mounted on the U-shaped frame, vertical plates symmetrically slidably mounted on the top of the base, an adjustment component mounted on the vertical plates, a clamping box fixedly mounted on the top of the vertical plates, a partition plate fixedly mounted on one side of the clamping box via a support rod, multiple springs fixedly mounted on one side of the partition plate, a clamping plate fixedly mounted on one end of each spring, one end of the clamping plate penetrating through one side of the clamping box and extending outward, and a first guide rod fixedly mounted on the other end of the clamping plate, one end of the first guide rod slidably penetrating through the other side of the clamping box and mounted with a locking component.
2. The miniature mechanical testing machine for orthopedic experimental research according to claim 1, characterized in that, The pressure assembly includes a cylinder, a movable plate, and a pressure sensor. The cylinder is fixedly installed at the top of the U-shaped frame. The output end of the cylinder passes through the top of the U-shaped frame and is fixedly installed on the movable plate. The pressure sensor is fixedly installed at the bottom of the movable plate. A pressure plate is installed at the bottom of the pressure sensor. A display is fixedly installed on one side of the top of the inner wall of the U-shaped frame. The display is electrically connected to the pressure sensor.
3. The miniature mechanical testing machine for orthopedic experimental research according to claim 2, characterized in that, The second guide rod is symmetrically fixedly installed at the top of the movable plate, and the top of the second guide rod slides through the U-shaped frame and extends to the outside.
4. The miniature mechanical testing machine for orthopedic experimental research according to claim 1, characterized in that, The adjustment assembly includes a bidirectional threaded rod, a guide frame, and a first motor. The guide frame is fixedly installed on one side of the top of the base. The bidirectional threaded rod is rotatably installed between the two sides of the inner wall of the guide frame. The first motor is fixedly installed at one end of the bidirectional threaded rod. A horizontal plate is symmetrically threaded on the bidirectional threaded rod. One end of the horizontal plate is fixedly connected to one side of the vertical plate.
5. A miniature mechanical testing machine for orthopedic experimental research according to claim 1, characterized in that, The base has symmetrically arranged strip-shaped holes, and a guide plate is fixedly installed between the two sides of the inner wall of the strip-shaped holes. The vertical plate is slidably installed on the guide plate.
6. The miniature mechanical testing machine for orthopedic experimental research according to claim 1, characterized in that, Multiple clamping plates are arranged at equal intervals inside the clamping box, and one end of each clamping plate is provided with an arc-shaped clamping groove.
7. The miniature mechanical testing machine for orthopedic experimental research according to claim 1, characterized in that, The clamping plate is symmetrically fixedly installed with limiting blocks on both sides. The limiting blocks are T-shaped. The inner walls of the clamping box are provided with limiting grooves that match the limiting blocks.
8. A miniature mechanical testing machine for orthopedic experimental research according to claim 1, characterized in that, The locking component includes a first bracket, a first threaded rod, and a second bracket. The first bracket is symmetrically fixedly installed on both sides of the clamping box. The first bracket is U-shaped and the first threaded rod is rotatably installed between its inner wall and the clamping box. Two first threaded rods are symmetrically arranged and fixedly connected by a rotating shaft. The second bracket is threadedly installed on the first threaded rod. The second bracket is also U-shaped and a clamping strip is symmetrically fixedly installed at one open end. The clamping strip is provided with a clamping groove that matches the support rod, and a second motor is fixedly installed at one end of one of the first threaded rods.