Test assembly

Abstract

The utility model provides a test assembly suitable for testing the grounding shape of a tire, and the test assembly comprises a steel belt which is arranged on a six-component test bench, the steel belt is used for being contacted with the tire, and the part, contacted with the tire, of the steel belt is movably arranged along a first preset direction; the steel belt drives the tire in contact with the steel belt to rotate around the axis of the tire at a preset rotating speed; the laser collecting part is used for collecting a three-dimensional point cloud model of the part, close to the steel belt, of the tire, and the laser collecting part is arranged in a reciprocating and movable mode at a first preset speed in the first preset direction; and the controller is in communication connection with the laser acquisition part so as to calculate the grounding shape of the tire according to the acquisition result of the laser acquisition part. According to the utility model, the problem of inaccurate test result of the dynamic grounding shape of the tire in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of tires, and more specifically, to a test component. Background Art

[0002] Tires are the only components of a vehicle that come into contact with the ground. To a certain extent, their dynamic grounding shape reflects information such as tire noise, lifespan, and uneven wear, which has important reference value for tire development and design optimization.

[0003] The grounding shape test of tires mainly includes static grounding shape test and dynamic grounding shape test. The static grounding shape test mainly uses a loading platform and an imprint test device (mainly including a pressure sensor sheet, pressure-sensitive paper, optical sensors, etc.). A stationary tire is pressed onto the imprint test device with a certain load to obtain the static imprint and grounding shape of the tire. The dynamic grounding shape test is mainly completed by a dynamic imprint testing machine and a pressure sensor sheet.

[0004] However, the dynamic imprint testing machine is expensive and has a low usable speed, which is quite different from the actual driving speed of a vehicle. When testing a vehicle by passing it through a pressure sensor sheet, the tire is likely to be contaminated with foreign objects and damage the pressure sensor sheet worth millions of yuan. Moreover, the repeatability and reproducibility of the speed parameters when manually driving a vehicle through the pressure sensor sheet are poor, resulting in different test results for the grounding shape of the tire each time, and further leading to a high test cost and inaccurate test results for the dynamic grounding shape of the tire. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a test component to solve the problem of inaccurate test results for the dynamic grounding shape of tires in the prior art.

[0006] To achieve the above purpose, the utility model provides a test component suitable for testing the grounding shape of a tire. The test component includes: a steel belt disposed on a six-component force test bench. The steel belt is used to contact the tire, and a part of the steel belt in contact with the tire is movably disposed along a first preset direction, so that the steel belt drives the tire in contact with it to rotate around the axis of the tire at a preset speed; a laser acquisition member for acquiring a three-dimensional point cloud model of a part of the tire close to the steel belt. The laser acquisition member is reciprocally movably disposed along the first preset direction at a first preset speed; a controller communicatively connected to the laser acquisition member to calculate the grounding shape of the tire based on the acquisition result of the laser acquisition member.

[0007] Further, the test component further includes a first driving member and a slider. The laser acquisition member is connected to the slider, and the first driving member is drivingly connected to the slider, so that the first driving member drives the laser acquisition member to move through the slider.

[0008] Further, the test component further includes a guide rail extending along a first preset direction. The slider is movably sleeved on the guide rail so that the laser acquisition member moves along the first preset direction.

[0009] Further, the test component further includes two groups of laser acquisition members. The two groups of laser acquisition members are oppositely arranged on both sides of the tire along the axial direction of the tire. Each group of laser acquisition members includes two laser acquisition members, and the two laser acquisition members are spaced apart along the first preset direction.

[0010] Further, there are two sliders, and the two sliders are arranged in one-to-one correspondence with the two groups of laser acquisition members. The two laser acquisition members of each group of laser acquisition members are spaced apart along the first preset direction on the corresponding slider.

[0011] Further, the laser acquisition member includes an acquisition part and a mounting part. The mounting part is connected to the slider, and the acquisition part is arranged on the mounting part.

[0012] Further, a laser beam emitting cylinder is arranged on the acquisition part. The included angle between the axial extension lines of the laser beam emitting cylinders of the two laser acquisition members of each group of laser acquisition members is a preset angle θ, and the value range of the preset angle θ is 60° ≤ θ ≤ 120°.

[0013] Further, the value range of the first preset speed v is: 1 mm / s ≤ v ≤ 5 mm / s.

[0014] Further, the test component further includes a support frame and a driving wheel. The support frame and the driving wheel are both arranged on the six-component force test bench. There are two driving wheels, and each driving wheel is rotatably arranged around its own axis. The steel belt is sleeved on the two driving wheels so that the driving wheels rotate to drive the steel belt to move; there are two support frames, and the two support frames are arranged in one-to-one correspondence with the two guide rails, and each guide rail is arranged on the corresponding support frame.

[0015] Further, the test component further includes a mounting platform and a second driving member. The mounting platform and the second driving member are both arranged on the six-component force test bench. The tire is rotatably arranged on the side of the mounting platform. The second driving member is drivingly connected to the tire so that the second driving member drives the tire to swing around the first circumferential center line of the tire, so that the included angle between the second circumferential center line of the tire and the first preset direction changes.

[0016] Applying the technical solution of the present utility model, the test component includes a steel belt, a laser acquisition component and a controller. The steel belt drives the tire to rotate around the axis of the tire at a preset speed. The laser acquisition component reciprocates along a first preset direction at a first preset speed, so that the laser acquisition component can acquire the entire three-dimensional point cloud model of the part of the tire close to the steel belt. Then, the controller processes the acquisition result of the laser acquisition component to obtain the grounding profile of the tire. Since the steel belt can drive the tire to rotate at a constant preset speed, and the preset speed is set to be the same as the actual driving speed of the tire, the test component of the present utility model can better simulate the actual driving situation of the tire. At the same time, since the rotation speed of the tire remains unchanged during multiple acquisitions of the three-dimensional point cloud model of the tire, the accuracy of the test result of the grounding shape of the tire is ensured, thus solving the problem of inaccurate test results of the dynamic grounding shape of the tire in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0018] Figure 1 The structural schematic diagram of an embodiment of the test component according to the present utility model is shown;

[0019] Figure 2 The structural schematic diagram of an embodiment of the tire and the test component according to the present utility model is shown;

[0020] Figure 3 The schematic diagram of partial test steps of the test component according to the present utility model is shown.

[0021] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0022] 1, tire; 10, steel belt; 20, laser acquisition component; 31, guide rail; 32, slider; 51, acquisition part; 52, installation part; 60, support frame; 61, driving wheel; 62, installation platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0026] Please refer to Figures 1 to 3 , the present utility model provides a test assembly, which is applicable to testing the grounding shape of a tire 1. The test assembly includes: a steel belt 10, which is arranged on a six-component force test bench. The steel belt 10 is used to contact the tire 1, and a part of the steel belt 10 in contact with the tire 1 is movably arranged along a first preset direction, so that the steel belt 10 drives the tire 1 in contact with it to rotate around the axis of the tire 1 at a preset speed; a laser acquisition member 20, which is used to acquire a three-dimensional point cloud model of a part of the tire 1 close to the steel belt 10. The laser acquisition member 20 is reciprocally movably arranged along the first preset direction at a first preset speed; a controller, which is communicatively connected to the laser acquisition member 20 to calculate the grounding shape of the tire 1 according to the acquisition result of the laser acquisition member 20.

[0027] The test component of the present utility model includes a steel belt 10, a laser acquisition component 20 and a controller. The steel belt 10 drives the tire 1 to rotate around the axis of the tire 1 at a preset speed, and the laser acquisition component 20 reciprocates along a first preset direction at a first preset speed, so that the laser acquisition component 20 can collect the entire three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10. Then, the controller processes the acquisition result of the laser acquisition component 20 to obtain the grounding profile of the tire. Since the steel belt 10 can drive the tire 1 to rotate at a constant preset speed, and the preset speed is set to be the same as the actual driving speed of the tire 1, the test component of the present utility model can better simulate the actual driving situation of the tire 1. At the same time, since the rotation speed of the tire 1 remains unchanged during the multiple acquisitions of the three-dimensional point cloud model of the tire 1, the accuracy of the test result of the grounding shape of the tire 1 is ensured, thus solving the problem of inaccurate test results of the dynamic grounding shape of the tire in the prior art.

[0028] Specifically, the preset speeds of the tire 1 are mainly 3.6 km / h, 40 km / h and 60 km / h, and the value range of the preset speed of the tire 1 is 0 - 140 km / h.

[0029] Specifically, the laser acquisition component can be a 2D line laser acquisition device, such as Keyence LJ-8000; the highest acquisition frequency of the laser acquisition component 20 is 16 kHz; through the cooperation of the 2D line laser acquisition device with the slider 32 and the guide rail 31, mobile acquisition is performed, and the three-dimensional point cloud model is obtained after fitting.

[0030] Specifically, the first preset direction is Figure 2 the X direction shown.

[0031] In this embodiment, as Figure 1 and Figure 2 shown, the test component further includes a first driving component and a slider 32. The laser acquisition component 20 is connected to the slider 32, and the first driving component is drivingly connected to the slider 32, so that the first driving component drives the laser acquisition component 20 to move through the slider 32.

[0032] Specifically, the slider 32 is used for drivingly connecting the first driving component and the laser acquisition component 20, so that the first driving component can drive the laser acquisition component 20 to move along the first preset direction through the slider 32, so as to ensure that the laser acquisition component 20 can collect the entire three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10, and avoid the phenomenon of omission in the acquisition of the three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10, resulting in errors in the test result of the grounding shape of the tire 1.

[0033] In this embodiment, as Figure 1 and Figure 2As shown, the test component further includes a guide rail 31 that extends along a first preset direction. A slider 32 is movably sleeved on the guide rail 31 to enable the laser acquisition member 20 to move along the first preset direction.

[0034] Specifically, through the cooperation of the guide rail 31 and the slider 32, the guide rail 31 can guide the slider 32 to prevent the slider 32 from deviating from the first preset direction of movement, thereby ensuring that the laser acquisition member 20 can only move along the first preset direction.

[0035] In this embodiment, as Figure 1 and Figure 2 shown, the test component further includes two groups of laser acquisition members. The two groups of laser acquisition members are arranged oppositely on both sides of the tire 1 along the axial direction of the tire 1. Each group of laser acquisition members includes two laser acquisition members 20, and the two laser acquisition members 20 are arranged at intervals along the first preset direction.

[0036] Specifically, each group of laser acquisition members includes two laser acquisition members 20. The two groups of laser acquisition members together include four laser acquisition members 20. The four laser acquisition members 20 respectively collect three-dimensional point cloud models of the part of the tire 1 close to the steel belt 10 from different angles, and then fit the acquisition results of the four laser acquisition members 20 to obtain a three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10 after fitting, improving the accuracy of the test results of the grounding shape of the tire 1.

[0037] In this embodiment, as Figure 1 and Figure 2 shown, there are two sliders 32. The two sliders 32 are arranged in one-to-one correspondence with the two groups of laser acquisition members. The two laser acquisition members 20 of each group of laser acquisition members are arranged at intervals along the first preset direction on the corresponding slider 32.

[0038] Specifically, each slider 32 drives the two laser acquisition members 20 in the corresponding group of laser acquisition members to move, thereby ensuring that each laser acquisition member 20 can move along the first preset direction, and further ensuring that each laser acquisition member 20 can collect the entire three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10.

[0039] Specifically, there are two guide rails 31. The two guide rails 31 are arranged in one-to-one correspondence with the two sliders 32.

[0040] In this embodiment, as Figure 1 and Figure 2 shown, the laser acquisition member 20 includes a collection part 51 and a mounting part 52. The mounting part 52 is connected to the slider 32, and the collection part 51 is arranged on the mounting part 52.

[0041] Specifically, the installation part 52 is used to connect the slider 32 and the acquisition part 51, and the acquisition part 51 is used to acquire the three-dimensional point cloud model of the contact part between the tire 1 and the steel belt 10.

[0042] In this embodiment, as Figure 1 and Figure 2 shown, the acquisition part 51 is provided with a transmitting cylinder for emitting laser beams. The included angle between the axial extension lines of the transmitting cylinders of the two laser acquisition elements 20 in each laser acquisition element group is a preset angle θ, and the value range of the preset angle θ is 60° ≤ θ ≤ 120°.

[0043] Specifically, such a setting ensures that the two laser acquisition elements 20 in each laser acquisition element group respectively acquire the three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10 from different angles. At the same time, since the two laser acquisition element groups are relatively arranged on both sides of the tire 1, it is further ensured that the four laser acquisition elements 20 respectively acquire the three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10 from different angles, thereby improving the accuracy of the test result of the grounding shape of the tire 1.

[0044] In this embodiment, the value range of the first preset speed v is: 1 mm / s ≤ v ≤ 5 mm / s.

[0045] Specifically, such a setting can avoid the slow acquisition speed of the three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10 caused by the too slow movement speed of the laser acquisition element 20, and can also avoid the omission phenomenon in the acquisition of the three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10.

[0046] In this embodiment, as Figure 1 and Figure 2 shown, the test assembly further includes a support frame 60 and a driving wheel 61. The support frame 60 and the driving wheel 61 are both arranged on the six-component test bench. There are two driving wheels 61, and each driving wheel 61 is rotatably arranged around the axis of each driving wheel 61. The steel belt 10 is sleeved on the two driving wheels 61 so that the driving wheels 61 rotate to drive the steel belt 10 to move; and / or, there are two support frames 60, and the two support frames 60 and the two guide rails 31 are arranged in one-to-one correspondence, and each transmission component is arranged on the corresponding support frame 60.

[0047] Specifically, the driving wheel 61 is used to drive the steel belt 10 to move, so that the tire 1 rotates at a preset speed; each support frame 60 is used to support each guide rail 31, so that each guide rail 31 can guide the corresponding slider 32.

[0048] In this embodiment, as Figure 1 and Figure 2As shown, the test component further includes an installation platform 62 and a second driving member. Both the installation platform 62 and the second driving member are arranged on the six-component force test bench. The tire 1 is rotatably arranged on the side of the installation platform 62. The second driving member is drivingly connected to the tire 1 so that the second driving member drives the tire 1 to swing around the first circumferential center line, so that the included angle between the second circumferential center line of the tire 1 and the first preset direction changes.

[0049] Specifically, the installation platform 62 is used to support the tire 1; the second driving member drives the tire 1 to swing around the first circumferential center line, so that the included angle between the second circumferential center line of the tire 1 and the first preset direction changes. The included angle between the second circumferential center line of the tire 1 and the first preset direction is the steering angle of the tire 1. By adjusting the steering angle of the tire 1, the test component of the present application can accurately simulate the actual driving condition of the tire 1, ensuring the accuracy of the test result of the grounding shape of the tire 1.

[0050] Specifically, the value range of the steering angle α is -15°≤α≤15°. When the extension direction of the second circumferential center line of the tire 1 is parallel to the first preset direction, the steering angle α is 0°. The first circumferential center line is perpendicular to the horizontal direction, and the extension direction of the second circumferential center line is perpendicular to the extension direction of the first circumferential center line.

[0051] During specific implementation, the test steps of the test component are as follows:

[0052] 1. Preparation work: Take a common 205 / 55R16 specification tire as the test object, paste a circular reflective sticker near the center position of the surface of the stationary steel belt 10, then set the moving speed of the slider 32 to 0.005 m / s, and the acquisition frequency of the laser acquisition member 20 to 200 Hz.

[0053] 2. Set the common position reference point coordinates: Each laser acquisition member 20 starts to acquire the three-dimensional point cloud model of the steel belt 10 and identifies the reflective sticker on the steel belt 10. Take the position where the reflective sticker is located as the reference point coordinate position (0, 0, 0), so that the 4 laser acquisition members 20 have a common reference point coordinate position.

[0054] 3. Load the tire: Set the preset rotation speed of the tire 1 to 40 km / h, the side slip angle of the tire 1 to 4°, the roll angle of the tire 1 to 1.5°, the air pressure of the tire 1 to a constant pressure of 240 kPa, and the load of the tire 1 to 4000 N. Start the six-component force test bench to start the test, so that the tire 1 reaches the set preset rotation speed, roll angle (i.e., the included angle between the tire center plane and the vertical plane of the tire forward direction), side slip angle (i.e., steering angle), air pressure, and load, and maintain a steady state.

[0055] 4. 3D Point Cloud Model Acquisition: Four laser acquisition components 20 start to acquire the 3D point cloud model of the part of the tire 1 near the steel belt 10, obtaining the 3D point cloud models of the part of the tire 1 near the steel belt 10 from four different angles, as shown in ① of Figure 3 .

[0056] 5. Fitting the 3D Point Cloud Model: Open the 3D point cloud models of the part of the tire 1 near the steel belt 10 from four different angles in the same window of 3D drawing software, adjust the coordinate positions of the reference points (0, 0, 0) of the four 3D point cloud models to the same position, and fit the four 3D point cloud models to obtain the fitted 3D point cloud model of the part of the tire 1 near the steel belt 10, as shown in ② of Figure 3 .

[0057] 6. Trimming the Steel Belt 10: Taking the upper surface of the steel belt 10 as the reference, establish a reference plane, and use this reference plane to trim the 3D point cloud model of the part of the tire 1 near the steel belt 10, trimming off the part of the steel belt 10 and below, as shown in ③ of Figure 3 . The plane shown by the dashed line is the established reference plane. After trimming, as shown in ④ of Figure 3 , the plane where the reference plane contacts the 3D point cloud model of the tire 1 is the grounding surface of the tire, and the edge of the grounding surface of the tire is the grounding contour of the tire.

[0058] 7. Adjusting the Viewing Angle: Adjust the viewing angle to look up, that is, look up from the bottom of the tire 1. At this time, the grounding surface of the tire can be viewed directly, as shown in ⑤ of Figure 3 .

[0059] 8. Exporting the 2D Drawing: Export the 3D point cloud model with the steel belt trimmed and the viewing angle looking up as a 2D DWG format CAD file.

[0060] 9. Obtaining the Grounding Contour: Open the DWG format file with 2D CAD software, trim off the point cloud outside the grounding contour, and the remaining is the grounding contour of the tire, as shown in ⑥ of Figure 3 .

[0061] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0062] The test component of the present utility model has a simple structure, is convenient to install and use, does not require additional large and expensive equipment, has low use and maintenance costs, is suitable for testing the grounding shape of tires with different diameters, and has a wide application range.

[0063] The test component of the present utility model includes a steel belt 10, a laser acquisition component 20, and a controller. The steel belt 10 drives the tire 1 to rotate around the axis of the tire 1 at a preset speed. The laser acquisition component 20 reciprocates along a first preset direction at a first preset speed, so that the laser acquisition component 20 can collect the entire three-dimensional point cloud model of the part of the tire 1 close to the steel belt 10. Then, the controller processes the acquisition result of the laser acquisition component 20 to obtain the grounding profile of the tire. Since the steel belt 10 can drive the tire 1 to rotate at a constant preset speed, and the preset speed is set to be the same as the actual driving speed of the tire 1, the test component of the present utility model can better simulate the actual driving condition of the tire 1. At the same time, since the rotation speed of the tire 1 remains unchanged during multiple acquisitions of the three-dimensional point cloud model of the tire 1, the accuracy of the test result of the grounding shape of the tire 1 is ensured, thus solving the problem that the test result of the dynamic grounding shape of the tire in the prior art is inaccurate.

[0064] For the sake of convenience in description, spatial relative terms, such as "above", "over", "on the upper surface", "above-mentioned", etc., can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation shown in the figure. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations should be made for the spatial relative descriptions used here.

[0065] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above words have no special meanings, so they cannot be understood as limiting the protection scope of the present application.

[0066] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A test assembly, suitable for testing the contact shape of a tire (1), characterized in that: The test components include: A steel belt (10) is arranged on a six-component force test bench, the steel belt (10) is used to contact the tire (1), and the portion of the steel belt (10) in contact with the tire (1) is movably arranged along a first preset direction, so that the steel belt (10) drives the tire (1) in contact with the steel belt (10) to rotate around the axis of the tire (1) at a preset speed; A laser collecting component (20), the laser collecting component (20) being used to collect a three-dimensional point cloud model of a portion of the tire (1) close to the steel belt (10), the laser collecting component (20) being arranged to be reciprocatingly movable along the first preset direction at a first preset speed; A controller is communicatively connected to the laser collecting component (20) so as to calculate the ground contact shape of the tire (1) based on the collection results of the laser collecting component (20).

2. The test assembly according to claim 1, characterized in that The test assembly further comprises a first driving member and a slider (32), the laser collection member (20) being connected to the slider (32), and the first driving member being drivingly connected to the slider (32) so that the first driving member drives the laser collection member (20) to move via the slider (32).

3. The test assembly according to claim 2, characterized in that The test assembly further comprises a guide rail (31), wherein the guide rail (31) extends along the first preset direction, and the slider (32) is movably sleeved on the guide rail (31) to enable the laser collecting component (20) to move along the first preset direction.

4. The test assembly according to claim 3, characterized in that The test assembly further comprises two laser collection component groups, the two laser collection component groups being arranged on opposite sides of the tire (1) along the axial direction of the tire (1), each of the laser collection component groups comprising two laser collection components (20), the two laser collection components (20) being arranged at intervals along the first preset direction.

5. The test assembly according to claim 4, characterized in that There are two sliders (32), and the two sliders (32) are arranged in one-to-one correspondence with the two laser collection component groups. The two laser collection components (20) of each laser collection component group are arranged on the corresponding slider (32) at intervals along the first preset direction.

6. The test assembly according to claim 4, characterized in that The laser collecting component (20) comprises a collecting portion (51) and a mounting portion (52); the mounting portion (52) is connected to the slider (32); and the collecting portion (51) is arranged on the mounting portion (52).

7. The test assembly according to claim 6, characterized in that The collecting part (51) is provided with an emitting tube for emitting a laser beam, and the angle between the axial extension lines of the emitting tubes of the two laser collecting components (20) of each laser collecting component group is a preset angle θ, and the value range of the preset angle θ is 60°≤θ≤120°.

8. The test assembly according to claim 1, characterized in that The value range of the first preset speed v is: 1mm / s≤v≤5mm / s.

9. The test assembly according to claim 4, characterized in that: The test assembly further comprises a support frame (60) and a driving wheel (61), wherein the support frame (60) and the driving wheel (61) are both arranged on the six-component force test bench, there are two driving wheels (61), each of the driving wheels (61) is rotatably arranged around an axis of the driving wheel (61), and the steel belt (10) is sleeved on the two driving wheels (61), so that the driving wheels (61) rotate to drive the steel belt (10) to move; There are two support frames (60), and the two support frames (60) and the two guide rails (31) are arranged in one-to-one correspondence, and each guide rail (31) is arranged on the corresponding support frame (60).

10. The test assembly according to claim 9, characterized in that The test assembly further comprises a mounting platform (62) and a second driving member, wherein the mounting platform (62) and the second driving member are both arranged on the six-component force test bench, the tire (1) is rotatably arranged on a side of the mounting platform (62), and the second driving member is drivingly connected to the tire (1) so that the second driving member drives the tire (1) to swing around a first circumferential center line of the tire (1) so that the angle between the second circumferential center line of the tire (1) and the first preset direction changes.

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