A contact stress visualization dynamic testing platform based on photoelastic method
The contact stress visualization and dynamic testing platform based on photoelasticity solves the problems of insufficient accuracy and convenience in testing contact stress during dynamic meshing of gears and racks, realizes dynamic visualization of contact stress and precise parameter control, and supports transmission design optimization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU CITY UNIV OF TECH
- Filing Date
- 2025-09-23
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies struggle to visualize contact stress during the dynamic meshing process of gears and racks, resulting in low precision in parameter control and recording, insufficient structural integration, and hindering the optimization of transmission design.
Design a dynamic contact stress visualization testing platform based on photoelasticity, including a mounting base, rotating rod, indexing plate, pointer, transmission components, drive device, meshing gears, meshing rack, lifting base, and bearing platform. Combined with an optical system, stress fringe observation and parameter recording are performed to achieve accurate capture and recording of dynamic stress.
It enables dynamic visualization observation of contact stress during gear and rack meshing, accurately records meshing state and load conditions, and provides reliable quantitative analysis data support.
Smart Images
Figure CN224535265U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stress visualization technology, and in particular to a dynamic testing platform for contact stress visualization based on photoelasticity. Background Technology
[0002] Gear and rack meshing transmission is a fundamental transmission method widely used in mechanical engineering. Its contact stress distribution directly affects transmission efficiency, service life, and structural safety. In the design and optimization of gears and racks, accurately obtaining the contact stress state during meshing, especially the distribution characteristics of dynamic contact stress, is crucial for improving transmission performance. Experimental testing is an effective means of obtaining the true stress distribution, among which photoelastic testing is widely used because it can visually present the stress field distribution.
[0003] Traditional photoelastic testing primarily targets static conditions, analyzing stress fringes by applying a fixed load to a transparent model. However, it suffers from the following shortcomings when testing contact stress during the dynamic meshing process of gears and racks: 1. Insufficient dynamic testing capability: Existing devices struggle to simulate the continuous meshing motion of gears and racks, failing to capture instantaneous stress changes at different meshing positions and thus failing to reflect the stress migration patterns in dynamic transmission; 2. Low precision in parameter control and recording: Poor correlation between load application and meshing position, lacking accurate recording and quantitative control of key parameters such as load magnitude and gear rotation angle, resulting in insufficient correspondence between stress data and operating conditions; 3. Low structural integration: Photoelastic testing systems and transmission simulation devices are often designed separately, leading to complex optical path calibration, susceptibility to device vibration or displacement affecting test accuracy, and cumbersome operation, hindering efficient multi-condition comparative experiments.
[0004] Therefore, there is a great need for an integrated testing platform that can visualize the contact stress during the dynamic meshing of gears and racks and has precise parameter control and recording functions, so as to make up for the shortcomings of existing technologies in the accuracy and convenience of dynamic stress testing and provide more reliable experimental basis for the design optimization of gear and rack transmissions. Utility Model Content
[0005] The purpose of this invention is to propose a dynamic testing platform for contact stress visualization based on photoelasticity. This integrated testing platform can visualize the contact stress during the dynamic meshing of gears and racks and has precise parameter control and recording functions. It can make up for the shortcomings of existing technologies in terms of accuracy and convenience of dynamic stress testing, and provide more reliable experimental basis for the optimization of gear and rack transmission design.
[0006] To achieve this objective, the present invention adopts the following technical solution: A dynamic testing platform for contact stress visualization based on photoelasticity includes a mounting base, a rotating rod, an indexing plate, a pointer, a transmission component, a drive device, meshing gears, meshing racks, a lifting base, and a load-bearing platform. The lifting seat is movable up and down and is installed on the mounting base. One end of the lifting seat is equipped with the bearing platform, and the other end of the lifting seat is equipped with one end of the meshing rack. The meshing gear is rotatably installed on the mounting base and meshes with the other end of the meshing rack. The rotating rod is rotatably mounted on the mounting base. The rotating rod is used to rotate the meshing gear through the transmission assembly. The driving device is used to drive the rotating rod to rotate. The indexing plate is mounted on the mounting base. The pointer is mounted on the rotating rod.
[0007] Furthermore, the transmission assembly includes a worm gear, a transmission gear, and a first rotating shaft; The first rotating shaft is rotatably mounted on the mounting base. The first rotating shaft is respectively mounted with the worm gear and the transmission gear. The transmission gear meshes with the meshing gear. The rotating rod is provided with a worm, which meshes with the worm gear.
[0008] Specifically, the mounting base includes a base plate, a main body, a first bearing, and a first clamping member; The main body is mounted on the base plate, and the base plate has mounting holes at its left and right ends respectively. The main body has first mounting grooves at its front and rear sides respectively. The first bearing is mounted in the first mounting groove. The two ends of the rotating shaft are respectively mounted on the two first bearings. The first clamping member is mounted on the main body and is used to clamp and fix the first bearing.
[0009] Preferably, the transmission assembly further includes a first limiting sleeve and a second limiting sleeve; The first rotating shaft is provided with a first keyway, a second keyway and a limiting block, wherein the limiting block is located between the first keyway and the second keyway; The worm gear is installed in the first keyway, one side of the worm gear abuts against one side of the limiting block, the first limiting sleeve is fitted on the first rotating shaft, one end of the first limiting sleeve abuts against the other side of the worm gear, and the other end of the first limiting sleeve abuts against the corresponding first bearing; The transmission gear is installed in the second keyway, one side of the second gear abuts against the other side of the limiting block, the second limiting sleeve is fitted onto the first rotating shaft, one end of the second limiting sleeve abuts against the other side of the transmission gear, and the other end of the second limiting sleeve abuts against the corresponding first bearing.
[0010] In some embodiments, the mounting base further includes a second bearing and a second clamping element; The main body is provided with a second mounting groove on its left and right sides respectively. The second bearing is installed in the second mounting groove. The two ends of the rotating rod are respectively installed in the two second bearings. The second clamping member is installed in the main body and is used to clamp and fix the second bearing.
[0011] Furthermore, the mounting base also includes a third bearing, a third clamping element, a mounting bracket, and a third rotating shaft; The mounting bracket is installed on the main body. The mounting bracket has a third mounting groove on its front and rear sides respectively. The third bearing is installed in the third mounting groove. The third rotating shaft is installed on the third bearing. The third rotating shaft is equipped with the meshing gear. The third clamping member is installed on the mounting bracket. The third clamping member is used to clamp and fix the third bearing.
[0012] Specifically, the mounting base also includes a slide rail and a slider; The slide rail is installed on the main body, the slider is installed on the lifting seat, and the slider is slidably installed on the slide rail.
[0013] Compared with the prior art, one of the above technical solutions has the following beneficial effects: Through the mounting base, rotating rod, indexing plate, pointer, transmission components, drive device, meshing gears, meshing rack, lifting base, and bearing platform, the stress stripe distribution during gear and rack meshing can be intuitively captured, enabling dynamic and visual observation of contact stress. Furthermore, in conjunction with the indexing plate and pointer, the rotation angle of the meshing gears and the corresponding meshing position can be accurately recorded. Combined with replaceable counterweights, load quantification control can be achieved, enabling precise correlation between stress testing and specific meshing states and load conditions, providing reliable data support for quantitative analysis. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of a contact stress visualization dynamic testing platform according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the worm gear structure according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the third mounting slot in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a transmission component according to one embodiment of the present invention; The components include: mounting base 1, base plate 11, mounting hole 111, main body 12, first mounting groove 121, second mounting groove 122, first bearing 13, first clamping component 14, second bearing 15, second clamping component 16, third bearing 17, third clamping component 18, mounting bracket 191, third mounting groove 192, third rotating shaft 193, rotating rod 2, worm gear 21, indexing plate 3, pointer 4, transmission assembly 5, worm wheel 51, transmission gear 52, first rotating shaft 53, first keyway 531, second keyway 532, limiting block 533, first limiting sleeve 54, second limiting sleeve 55, slide rail 61, slider 62, meshing gear 7, meshing rack 8, lifting seat 9, and bearing platform 10. Detailed Implementation
[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0017] In one embodiment of this utility model, such as Figure 1-4As shown, a contact stress visualization dynamic testing platform based on photoelasticity includes a mounting base 1, a rotating rod 2, an indexing plate 3, a pointer 4, a transmission component 5, a drive device, a meshing gear 7, a meshing rack 8, a lifting base 9, and a bearing platform 10. The lifting base 9 is movable up and down and is mounted on the mounting base 1. The bearing platform 10 is mounted on one end of the lifting base 9, and one end of the meshing rack 8 is mounted on the other end of the lifting base 9. The meshing gear 7 is rotatably mounted on the mounting base 1 and meshes with the other end of the meshing rack 8.The rotating rod 2 is rotatably mounted on the mounting base 1. The rotating rod 2, through the transmission assembly 5, is used to rotate the meshing gear 7. The driving device is used to drive the rotating rod 2 to rotate. The indexing plate 3 is mounted on the mounting base 1, and the pointer 4 is mounted on the rotating rod 2. In this embodiment, both the meshing gear 7 and the meshing rack 8 are made of polycarbonate (photoelastic material). The mounting base 1 is made of 6061 aluminum alloy. The driving device is a motor coupling structure, located on the left side of the mounting base 1. The output end of the driving device is connected to the rotating rod 2. The indexing plate 3 is mounted on the left side of the mounting base 1. The pointer 4 is mounted on the rotating rod 2 and is used to indicate the scale value of the indexing plate 3. The top of the lifting seat 9 is equipped with the bearing platform 10, and the bottom of the lifting seat 9 is equipped with the meshing rack 8. Yes, this test also requires the setup of a corresponding light source, filter, polarizer, analyzer, and camera. The polarizer and analyzer are each equipped with a quarter-wave plate. Specifically, the components are arranged sequentially from front to back: light source, filter, polarizer, quarter-wave plate, contact stress visualization dynamic testing platform, quarter-wave plate, analyzer, and camera. The light source provides stable incident light as the optical signal source for the photoelastic test, ensuring that the light can penetrate the meshing gear 7 and meshing rack 8. The filter is used to filter stray light from the light source, making the incident light a single-wavelength monochromatic light, eliminating the fringe blurring caused by multi-color light interference, and allowing the stress fringe to be clearly visualized. The stress fringes are clearer, making them easier to observe and quantitatively analyze. The polarizer converts natural light into linearly polarized light. The analyzer works in conjunction with the polarizer, and its polarization direction is perpendicular to the polarizer. The 1 / 4 wave plate is set perpendicularly to eliminate isochoric lines. The camera is used to acquire images of stress fringes formed behind the analyzer in real time. The mounting base 1 has corresponding clearance areas on its front and rear sides to ensure that the light source and camera can face the meshing position of the meshing gear 7 and the meshing rack 8. During operation, the counterweight is placed on the bearing platform 10, and the lifting seat 9 moves downward under force, causing the meshing rack 8 and the meshing gear 7 to mesh with each other under load. When the meshing rack 8 and meshing gear 7 come into contact, stress is generated. Then, the driving device drives the rotating rod 2 to rotate. The rotating rod 2 causes the meshing gear 7 to rotate through the transmission assembly 5. The pointer 4 and the indexing plate 3 record the corresponding data. Under the action of the light source, filter, polarizer and analyzer, the stripe image captured by the camera can intuitively show the distribution of contact stress, such as the stress stripe image under various loads. The correspondence between the counterweight mass, meshing position and stripe distribution is recorded. By comparing the stress stripe images under different conditions with the quantitative calculation results, the distribution characteristics of contact stress during the gear and rack meshing process are clarified.This invention, through a mounting base 1, rotating rod 2, indexing plate 3, pointer 4, transmission assembly 5, drive device, meshing gear 7, meshing rack 8, lifting seat 9, and bearing platform 10, can intuitively capture the stress stripe distribution during gear and rack meshing, achieving dynamic and visual observation of contact stress. Furthermore, in conjunction with the indexing plate 3 and pointer 4, it can accurately record the rotation angle of the meshing gear 7 and its corresponding meshing position. Combined with replaceable counterweights, it enables quantitative load control, allowing for precise correlation between stress testing and specific meshing states and load conditions, providing reliable data support for quantitative analysis.
[0018] like Figure 2-4 As shown, the transmission assembly 5 includes a worm gear 51, a transmission gear 52, and a first rotating shaft 53; the first rotating shaft 53 is rotatably mounted on the mounting base 1, and the first rotating shaft 53 is respectively mounted with the worm gear 51 and the transmission gear 52, the transmission gear 52 meshing with the meshing gear 7, and the rotating rod 2 is provided with a worm 21, the worm 21 meshing with the worm gear 51. In this embodiment, the rotating rod 2 only has a worm 21 section, eliminating the need for machining extra worms and greatly improving machining efficiency. During operation, the driving device drives the rotating rod 2 to rotate, and the rotating rod 2 drives the worm wheel 51 to rotate through the worm 21 on its outer periphery. The worm wheel 51 drives the transmission gear 52 to rotate synchronously through the first rotating shaft 53, thereby causing the transmission gear 52 to drive the meshing gear 7 to rotate. The transmission assembly 5 forms a two-stage transmission structure through the meshing of the worm 21 and the worm wheel 51, combined with the precise meshing of the transmission gear 52 and the meshing gear 7, realizing the step-by-step transmission of power. The meshing of the worm and worm wheel has the characteristics of stable transmission ratio and good self-locking, which can effectively avoid transmission slippage caused by load changes. The meshing between gears ensures the accuracy of motion transmission. The combination of the two enables the power to be transmitted to the meshing gear 7 efficiently and stably, ensuring that the meshing motion of the gear and rack is smooth and controllable, and reducing the impact of transmission impact on the accuracy of photoelastic testing.
[0019] like Figure 2As shown, the mounting base 1 includes a base plate 11, a main body 12, a first bearing 13, and a first clamping member 14. The main body 12 is mounted on the base plate 11. The left and right ends of the base plate 11 are respectively provided with mounting holes 111. The front and rear sides of the main body 12 are respectively provided with first mounting grooves 121. The first bearing 13 is mounted in the first mounting grooves 121. The two ends of the rotating shaft 51 are respectively mounted on the two first bearings 13. The first clamping member 14 is mounted on the main body 12 and is used to clamp and fix the first bearing 13. In this embodiment, the base plate 11 and the main body 12 are integrally formed. There are four mounting holes 111. The mounting base 1 can be fixedly placed through the four first mounting holes 111 to ensure the stability of subsequent testing. There are two first bearings 13 and two first mounting grooves 121. The first clamping member 14 has an H-shaped structure. The first clamping member 14 and the corresponding position of the first mounting groove 121 are provided with corresponding grooves. During installation, the two first bearings 13 are placed in the two first mounting grooves 121 respectively, and then the first clamping member 14 is locked and installed on the main body 12 with locking screws so that the first clamping member 14 can press and fix the two first bearings 13. The setting of the first bearings 13 can help improve the smoothness of the rotation of the first rotating shaft 53 and avoid the phenomenon of poor rotation or rotation jamming.
[0020] like Figure 3-4As shown, the transmission assembly 5 further includes a first limiting sleeve 54 and a second limiting sleeve 55; the first rotating shaft 53 is provided with a first keyway 531, a second keyway 532 and a limiting block 533, the limiting block 533 being located between the first keyway 531 and the second keyway 532; the worm gear 51 is installed in the first keyway 531, one side of the worm gear 51 abuts against one side of the limiting block 533; the first limiting sleeve 54 is fitted onto the first rotating shaft 53, one end of the first limiting sleeve 54 abuts against the other side of the worm gear 51, and the other end of the first limiting sleeve 54 abuts against the corresponding first bearing 13; the transmission gear 52 is installed in the second keyway 532, one side of the second gear 53 abuts against the other side of the limiting block 533; the second limiting sleeve 55 is fitted onto the first rotating shaft 53, one end of the second limiting sleeve 55 abuts against the other side of the transmission gear 52, and the other end of the second limiting sleeve 55 abuts against the corresponding first bearing 13. In this embodiment, the first keyway 531 is located on the front side of the limiting block 533, and the second keyway 532 is located on the rear side of the limiting block 533. During installation, the worm gear 51 is installed in the first keyway 531, with the rear end face of the worm gear 51 abutting against the front end face of the limiting block 533. Then, the first limiting sleeve 54 and the first bearing 13 are sequentially fitted onto the front end of the first rotating shaft 53, with the rear end of the first limiting sleeve 54 abutting against the front end face of the worm gear 51 and the front end face of the first limiting sleeve 54 abutting against the front bearing 13. Similarly, the transmission gear 52 is installed on the... The second keyway 532 is used to make the front end face of the transmission gear 52 abut against the rear end face of the limiting block 533. Then, the second limiting sleeve 55 and the first bearing 13 are sequentially fitted onto the rear end of the first rotating shaft 53, so that the front end face of the second limiting sleeve 55 abuts against the rear end face of the transmission gear 52, and the rear end face of the second limiting sleeve 55 abuts against the rear side of the first bearing 13. Finally, the installed transmission assembly 5 is installed on the mounting base 1, so that the worm gear 51 and the transmission gear 52 can be limited and installed on the first rotating shaft 53 to prevent them from moving or deviating during the test and to ensure the accuracy of the test.
[0021] like Figure 2As shown, the mounting base 1 further includes a second bearing 15 and a second clamping member 16; the left and right sides of the main body 12 are respectively provided with second mounting grooves 122, the second bearing 15 is installed in the second mounting grooves 122, the two ends of the rotating rod 2 are respectively installed in the two second bearings 15, and the second clamping member 16 is installed in the main body 12. The second clamping member 16 is used to clamp and fix the second bearing 15. In this embodiment, there are two second bearings 15 and two second mounting grooves 122. The second clamping member 16 and the corresponding position of the second mounting groove 122 are provided with corresponding grooves. During installation, the two second bearings 15 are respectively placed in the two second mounting grooves 122, and then the second clamping member 16 is locked and installed in the main body 12 with locking screws, so that the second clamping member 16 can clamp and fix the two second bearings 15. The provision of the second bearings 15 can help improve the smoothness of the rotation of the rotating rod 2 and avoid the phenomenon of poor rotation or rotation jamming.
[0022] like Figure 2-3 As shown, the mounting base 1 further includes a third bearing 17, a third clamping member 18, a mounting bracket 191, and a third rotating shaft 193; the mounting bracket 191 is mounted on the main body 12, and the front and rear sides of the mounting bracket 191 are respectively provided with third mounting grooves 192, the third bearing 17 is mounted in the third mounting grooves 192, the third rotating shaft 193 is mounted on the third bearing 17, the third rotating shaft 193 is mounted with the meshing gear 7, the third clamping member 18 is mounted on the mounting bracket 191, and the third clamping member 18 is used to clamp and fix the third bearing 17. In this embodiment, there are two third bearings 17 and two third mounting grooves 192. The third clamping member 18 has a U-shaped structure. The third clamping member 18 and the third mounting groove 192 have corresponding grooves at their corresponding positions. During installation, the mounting bracket 191 is installed on the main body 12, the meshing gear 7 is installed on the third rotating shaft 193, the two ends of the two third rotating shafts 193 are respectively installed on the two third bearings 17, the two third bearings 17 are installed in the third mounting groove 192, and finally the third clamping member 18 is locked and installed on the mounting bracket 191 with a locking screw, so that the third clamping member 18 presses and fixes the two third bearings 17. The setting of the third bearings 17 can help improve the smoothness of the rotation of the third rotating shaft 193 and avoid the phenomenon of poor rotation or rotation jamming.
[0023] like Figure 1-2As shown, the mounting base 1 further includes a slide rail 61 and a slider 62; the slide rail 61 is mounted on the main body 12, and the slider 62 is mounted on the lifting seat 9, with the slider 62 slidably mounted on the slide rail 61. In this embodiment, there are two slide rails 61 and two sliders 62. The two slide rails 61 are respectively mounted on the inner side of the top of the main body 12, and the two sliders 62 are respectively mounted on the left and right sides of the lifting seat 9. By setting the slider-slide rail structure, the smoothness and accuracy of the movement of the lifting seat 9 are improved, and deviation during movement is prevented.
[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0025] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A dynamic testing platform for contact stress visualization based on photoelasticity, characterized in that: It includes a mounting base, rotating rod, indexing plate, pointer, transmission components, drive unit, meshing gears, meshing rack, lifting base, and load-bearing platform; The lifting seat is movable up and down and is installed on the mounting base. One end of the lifting seat is equipped with the bearing platform, and the other end of the lifting seat is equipped with one end of the meshing rack. The meshing gear is rotatably installed on the mounting base and meshes with the other end of the meshing rack. The rotating rod is rotatably mounted on the mounting base. The rotating rod is used to rotate the meshing gear through the transmission assembly. The driving device is used to drive the rotating rod to rotate. The indexing plate is mounted on the mounting base. The pointer is mounted on the rotating rod.
2. The contact stress visualization dynamic testing platform based on photoelasticity according to claim 1, characterized in that: The transmission assembly includes a worm gear, a transmission gear, and a first rotating shaft; The first rotating shaft is rotatably mounted on the mounting base. The first rotating shaft is respectively mounted with the worm gear and the transmission gear. The transmission gear meshes with the meshing gear. The rotating rod is provided with a worm, which meshes with the worm gear.
3. The contact stress visualization dynamic testing platform based on photoelasticity according to claim 2, characterized in that: The mounting base includes a base plate, a main body, a first bearing, and a first clamping element; The main body is mounted on the base plate, and the base plate has mounting holes at its left and right ends respectively. The main body has first mounting grooves at its front and rear sides respectively. The first bearing is mounted in the first mounting groove. The two ends of the rotating shaft are respectively mounted on the two first bearings. The first clamping member is mounted on the main body and is used to clamp and fix the first bearing.
4. The contact stress visualization dynamic testing platform based on photoelasticity according to claim 3, characterized in that: The transmission assembly further includes a first limiting sleeve and a second limiting sleeve; The first rotating shaft is provided with a first keyway, a second keyway and a limiting block, wherein the limiting block is located between the first keyway and the second keyway; The worm gear is installed in the first keyway, one side of the worm gear abuts against one side of the limiting block, the first limiting sleeve is fitted on the first rotating shaft, one end of the first limiting sleeve abuts against the other side of the worm gear, and the other end of the first limiting sleeve abuts against the corresponding first bearing; The transmission gear is installed in the second keyway, one side of the transmission gear abuts against the other side of the limiting block, the second limiting sleeve is fitted onto the first rotating shaft, one end of the second limiting sleeve abuts against the other side of the transmission gear, and the other end of the second limiting sleeve abuts against the corresponding first bearing.
5. The contact stress visualization dynamic testing platform based on photoelasticity according to claim 3, characterized in that: The mounting base also includes a second bearing and a second clamping element; The main body is provided with a second mounting groove on its left and right sides respectively. The second bearing is installed in the second mounting groove. The two ends of the rotating rod are respectively installed in the two second bearings. The second clamping member is installed in the main body and is used to clamp and fix the second bearing.
6. The contact stress visualization dynamic testing platform based on photoelasticity according to claim 3, characterized in that: The mounting base also includes a third bearing, a third clamping element, a mounting bracket, and a third rotating shaft; The mounting bracket is installed on the main body. The mounting bracket has a third mounting groove on its front and rear sides respectively. The third bearing is installed in the third mounting groove. The third rotating shaft is installed on the third bearing. The third rotating shaft is equipped with the meshing gear. The third clamping member is installed on the mounting bracket. The third clamping member is used to clamp and fix the third bearing.
7. The contact stress visualization dynamic testing platform based on photoelasticity according to claim 3, characterized in that: The mounting base also includes a slide rail and a slider; The slide rail is installed on the main body, the slider is installed on the lifting seat, and the slider is slidably installed on the slide rail.