Track testing device

Abstract

The utility model provides a rut test device which comprises a rut wheel, a rut plate and a driving device, the rut wheel is arranged and rolls on the surface of the rut plate, the center of the rut plate is connected with the driving device, the contact point of the rut wheel arranged on the rut plate is not overlapped with the center, the driving device drives the rut plate, and the rut plate is connected with the rut plate. And the track plate rotates around the center relative to the track wheel. Compared with a traditional track wheel which does horizontal reciprocating motion on a track plate, the device can simulate the damage degree of wheels to the ground when a vehicle is at a crossroad or a turning intersection, and the complete circumferential running track of the device can truly express the running path when the vehicle turns as much as possible. The driving equipment is connected with the rutting plate and drives the rutting plate to rotate, and compared with the mode of driving the rutting wheel to move around the rutting plate, the device has the advantages that a needed movement mechanism is simpler, the structure is more compact, and the space is saved, and the economic cost is considered.

Description

Technical Field

[0001] This utility model relates to the field of road testing equipment, and in particular to a rut testing device. Background Technology

[0002] Testing the various properties of pavement materials requires a rutting test apparatus. This apparatus places a counterweight and a rutting wheel on top of the rutted surface of the test object. Under the weight of the counterweight, the rutting wheel moves relative to the rutted surface, thus creating wear marks on the rutted surface. Testers assess the performance of the pavement material by observing or measuring the degree of damage on the rutted surface.

[0003] Most current rutting test apparatuses simulate vehicle trajectories using simple linear reciprocating motion between a rutting plate and a rutting wheel. However, in reality, the force distribution on the road surface when a vehicle turns differs from that when traveling in a straight line, generating special loads such as lateral forces. Therefore, simulating the degree of damage to the road surface material caused by vehicle wheels during turning has become a key focus in this technical field. However, the problem of how to realistically simulate the complete wheel trajectory of a vehicle during turning using a relatively simple motion structure remains unsolved. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of existing technology in that it cannot truly simulate the ruts formed by the wheels on the road surface when a vehicle turns, and to provide a rut testing device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A rutting test apparatus includes a rutting wheel, a rutting plate, and a driving device. The rutting wheel is disposed on and rolls on the surface of the rutting plate. The center of the rutting plate is connected to the driving device. The contact point of the rutting wheel on the rutting plate does not coincide with the center. The driving device drives the rutting plate to rotate relative to the rutting wheel around the center.

[0007] In this rutting test apparatus, the rutting wheel remains stationary while the drive unit operates, while the rutting plate rotates relative to the rutting wheel. The pressure point trajectory formed by the rutting wheel on the rutting plate is a complete circle. Compared to the traditional method where the rutting wheel moves horizontally back and forth on the rutting plate, this apparatus can simulate the degree of damage to the ground caused by vehicle wheels at intersections or turns, and its complete circular trajectory can realistically represent the vehicle's turning path. By connecting the drive unit and driving the rutting plate to rotate, compared to driving the rutting wheel to move around the rutting plate, this apparatus requires a simpler motion mechanism, has a more compact structure, and combines space saving and economic cost considerations.

[0008] Preferably, the rut testing device further includes a counterweight and a support assembly. The support assembly includes a vertical rod, the lower end of which is connected to the rut wheel, and the upper end of which is connected to the counterweight. The horizontal position of the vertical rod relative to the rut plate is defined, and the vertical position of the vertical rod relative to the rut plate is adjustable.

[0009] In this device, the counterweights simulate different loads borne by rutted wheels on actual roads. By adjusting the weight of the counterweights, the deformation of the rutted slab under different load conditions can be studied, making the test results more consistent with the stress conditions of actual roads. The horizontal position of the vertical rod relative to the rutted slab is fixed, ensuring that the rutted wheel remains stationary in a horizontal position under the support of the vertical rod, avoiding unclear test results due to the horizontal position deviation of the rutted wheel, and improving the reliability of the test results. At the same time, the vertical position of the vertical rod relative to the rutted slab is adjustable, allowing for flexible switching between whether the rutted wheel is pressing on the rutted slab, and adapting to different load requirements, thus providing a more comprehensive evaluation of the performance of the rutted slab material under different working conditions.

[0010] Preferably, the support assembly further includes a fixed bracket and a jack, the fixed bracket is used for positioning on the ground, the fixed bracket supports the jack, and the lifting rod of the jack is connected to the counterweight block;

[0011] Alternatively, the rut testing device may further include a housing, and the support assembly may further include a crossbar, one end of which is rotatably connected to the side of the housing, and the other end of which is connected to the vertical bar.

[0012] In this device, the support assembly keeps the rut wheel and counterweight pressed against the rut slab in a vertical position, preventing them from tipping over. In the scheme using a fixed bracket and jacks, the fixed bracket is positioned on the ground, providing a stable support foundation for the entire device. It can withstand the weight of the jacks and counterweights, as well as various forces generated during the test, ensuring that the device will not shake or shift during the test, guaranteeing the stability and safety of the experiment. The jacks allow for more precise loading of the counterweights; by controlling the lifting height of the jacks, the load applied to the rut wheel can be accurately adjusted to meet the load accuracy requirements of different tests. In the scheme using a crossbar and a housing, one end of the crossbar is rotatably connected to the side of the housing, allowing the vertical bar and rut wheel to be adjusted vertically to accommodate rut slabs of different thicknesses and minor deformations or unevenness of the rut slab. This ensures that the rut wheel maintains good contact with the rut slab surface, ensuring that the test results more accurately reflect the actual performance of the rut slab material.

[0013] Preferably, the counterweight comprises a plurality of relatively detachably connected cast iron blocks.

[0014] By setting counterweights and flexibly increasing or decreasing the number of cast iron blocks, the pressure value of the wheel on the rut plate can be precisely adjusted, enabling it to simulate road conditions under various traffic loads, from light vehicles to heavy vehicles, and providing accurate experimental conditions for studying the influence of different loads on road rutting.

[0015] Preferably, the rut testing device further includes a heating pipeline and a temperature control module, wherein the heating pipeline is electrically connected to the temperature control module.

[0016] Setting up heating pipes and a temperature control module allows for control of the ambient temperature during testing. With precise temperature control, various temperature environments can be created, even simulating road surface temperatures in hot summer weather. This makes rutting tests more closely resemble real road conditions, allowing for a more accurate study of the impact of temperature on rutting formation. For example, when studying rutting problems in high-temperature areas, the ambient temperature can be raised to 60°C or even higher to observe the deformation of the rutting slab material under high temperatures.

[0017] Preferably, the rut testing device further includes a transmission assembly, one end of which is connected to the center of the rut plate, and the other end of which is connected to the drive device. The transmission assembly is used to transmit the power output by the drive device to the rut plate.

[0018] The transmission assembly installed between the drive unit and the rut plate in this device can optimize power transmission, improve equipment stability and reliability, reduce maintenance costs, and enhance equipment adaptability, thus ensuring the smooth conduct and accuracy of rut tests.

[0019] Preferably, the transmission assembly includes a driven shaft, a transmission belt, a driving pulley, and a driven pulley. The driven pulley is axially connected to the center of the rut plate via the driven shaft, and the driving pulley is axially connected to the driving device via the output shaft of the driving device.

[0020] This transmission assembly utilizes belt drive, resulting in smoother operation and lower noise. During rut tests, it ensures the rut plate rotates at a relatively uniform speed, leading to more stable pressure from the rut wheel and improved test accuracy and reliability. Furthermore, by using the drive unit's output shaft as the drive shaft, it eliminates the need for additional couplings, drive shafts, or other components to connect the drive unit and drive wheel, reducing the number of parts and providing more space and flexibility for the installation and arrangement of other components.

[0021] Preferably, a central hole is formed at the center of the rut plate, and a positioning keyway is provided at one end of the driven shaft that is connected to the central hole of the rut plate, and a positioning key is provided at the corresponding position of the central hole.

[0022] By utilizing the combination of locating keyways and locating keys, the relative position of the rut plate and the driven shaft can be precisely defined. This ensures that when the rut plate is installed on the driven shaft, it is accurately positioned according to the design, guaranteeing that the center of the rut plate coincides with the axis of the driven shaft. Furthermore, it effectively transmits the torque of the driven shaft to the rut plate, allowing it to rotate at a set speed and trajectory under the drive of the driven shaft. This ensures the stability and accuracy of the rut plate during rotation and improves the reliability of the test results.

[0023] Preferably, the transmission belt is made of a composite material of rubber and fiber;

[0024] Alternatively, the transmission assembly may further include a tension pulley, which is mounted on the inner side of the transmission belt.

[0025] During the test, the drive belt continuously contacts and rubs against the driving and driven pulleys. The use of a rubber and fiber composite material ensures that the drive belt will not easily break or be excessively stretched and deformed under prolonged, high-load operation, guaranteeing the stable operation of the testing device. Simultaneously, the drive belt may loosen due to wear and heat during operation. The tension pulley is adjustable to maintain the drive belt at a suitable tension. Appropriate tension ensures sufficient friction between the drive belt and the driving and driven pulleys, preventing slippage, ensuring efficient power transmission, and allowing the rutted plate to rotate stably, avoiding deviations in test data due to drive belt loosening.

[0026] Preferably, the driving device includes a motor and a reducer. The motor is a variable frequency motor. With the cooperation of the reducer, the motor drives the rut plate to rotate around the center at a speed range of 10 to 20 revolutions per minute.

[0027] Variable frequency motors can change their operating frequency. By changing the operating frequency of the motor, and with the help of a reducer, the rotational speed of the rutting plate can be limited to the range of 10 to 20 revolutions per minute. This allows it to meet the different requirements of different types of road materials and test conditions for the rotational speed of the rutting plate, and can more realistically simulate the rutting effect of vehicles on the road surface at different driving speeds.

[0028] The positive and progressive effects of this utility model are as follows:

[0029] In this rutting test device, the rutting wheel remains stationary while the drive unit operates, while the rutting plate rotates relative to the rutting wheel. The pressure point trajectory formed by the rutting wheel on the rutting plate is a complete circle. Compared to the traditional method where the rutting wheel moves horizontally back and forth on the rutting plate, this device can simulate the degree of damage to the ground caused by vehicle wheels at intersections or turns, and its complete circular trajectory can realistically represent the vehicle's turning path. By connecting the drive unit to the rutting plate and driving its rotation, compared to driving the rutting wheel to move around the rutting plate, the required motion mechanism is simpler, making the device more compact and achieving both space saving and cost-effectiveness. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the rut testing device according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] rut testing device 1

[0033] Wheel 10

[0034] Contact point 11

[0035] 20 ruts

[0036] Center 21

[0037] Drive device 30

[0038] Transmission component 40

[0039] Drive wheel 41

[0040] Driven wheel 42

[0041] Power take-off shaft 43

[0042] Driven shaft 44

[0043] 45mm drive belt

[0044] Counterweight 50

[0045] Support component 60

[0046] Wheel and axle 61

[0047] Vertical rod 62

[0048] Fixed bracket 63

[0049] Jack 64, lifting rod 641

[0050] First direction A Detailed Implementation

[0051] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0052] This embodiment is a test device for testing the performance of road surface materials by simulating ruts formed when a vehicle turns, where a rut wheel 10 compresses the road surface material (simulated by the upper surface of a rutting plate 20). In this embodiment, the rutting plate 20 is a cuboid with a length of 30cm, a width of 30cm, and a height of 5cm. The upper surface of the rutting plate 20 is a square with both a length and a width of 30cm. The upper surface of the rutting plate 20 is made of asphalt mixture, and the rutting wheel 10 is made of synthetic rubber. In other embodiments, the materials of the rutting wheel 10 and the rutting plate 20 can be changed according to the different requirements of the test material. Specific details can be found in existing road surface material performance testing schemes, which will not be elaborated here.

[0053] like Figure 1 As shown, the center 21 of the rut plate 20 is connected to the drive device 30, and the contact point 11 of the rut plate 20 is not aligned with the center 21 of the rut plate 20. Specifically, in this embodiment, the distance between the contact point 11 and the center 21 of the rut plate 20 is set to 10 cm. The drive device 30 drives the rut plate 20, causing the rut plate 20 to rotate relative to the rut wheel 10 around the center 21. In addition, to facilitate the replacement of the rut plate 20, the center 21 of the rut plate 20 and the drive device 30 are connected in a detachable manner, such as a threaded connection, to facilitate the disassembly and replacement of the rut plate 20 and fully meet the relevant requirements for pavement material performance testing.

[0054] In this device, the wheel 10 remains stationary while the drive unit 30 is running, but rotates. The contact point 11 formed by the wheel 10 on the rut plate 20 forms a complete circle (centered at the center 21 of the rut plate 20, with a radius of 10 cm). This complete circular trajectory accurately represents the path of the wheels when the vehicle turns. Compared to driving the wheel 10 to move around the rut plate 20, this device drives the rut plate 20 to rotate, resulting in a simpler and more compact motion mechanism.

[0055] In this embodiment, the rut testing device 1 further includes a counterweight 50 and a support assembly 60. The support assembly 60 includes a vertical rod 62, the lower end of which is connected to the rut wheel 10, and the upper end of which is connected to the counterweight 50. The horizontal position of the vertical rod 62 relative to the rut plate 20 is defined, and the vertical position of the vertical rod 62 relative to the rut plate 20 is adjustable.

[0056] like Figure 1As shown, to achieve the goal of limiting the horizontal position of the vertical rod 62 relative to the rut plate 20 while allowing adjustment of its vertical position, this embodiment provides a scheme using a fixed bracket 63 and a jack 64 to effectively support the counterweight 50 and the vertical rod 62. The fixed bracket 63 is used to position itself on the ground and supports the jack 64, i.e., the jack 64 is placed on the support platform provided by the fixed bracket 63. The lifting rod 641 located on the upper part of the jack 64 is connected upward to the counterweight 50, preventing the counterweight 50, the vertical rod 62, and the rut wheel 10 from moving horizontally. At the same time, by controlling the weight of the counterweight 50 and the height of the lifting rod 641 of the jack 64, the rut wheel 10 can be kept in contact with the rut plate 20, and the load applied to the rut wheel 10 can be accurately adjusted to meet the load accuracy requirements under different test conditions.

[0057] Of course, to achieve the goal of limiting the horizontal position of the vertical rod 62 relative to the rut plate 20 while allowing adjustment of its vertical position relative to the rut plate 20, any other structure known in the prior art can be used to connect the counterweight 50 or the vertical rod 62. For example, in other embodiments, the support assembly 60 of the rut testing device 1 further includes a housing (not shown in the figure) and a crossbar (not shown in the figure). One end of the crossbar of the vertical rod 62 is rotatably connected to the inner side wall of the housing, the other end of the crossbar is connected to the upper end of the vertical rod 62, and the lower end of the vertical rod 62 is connected to the rut wheel 10. By setting the crossbar to connect the housing and the vertical rod 62, the vertical rod 62 and the rut wheel 10 can maintain a stable vertical state, so that the connected rut wheel 10 remains pressed against the rut plate 20. Of course, in other embodiments, a connecting structure can also be used to connect to the vertical rod 62 to maintain the vertical state of the vertical rod 62; specific connection schemes can refer to the prior art. Meanwhile, the use of a box structure in this device allows other components to be placed in a relatively enclosed space, which can then be used to control the temperature inside the box to simulate various test conditions and also reduce the noise during device operation.

[0058] In this embodiment, the counterweight 50 is positioned above the rutting wheel 10, and the axle 61 in the support assembly 60 connects the vertical rod 62 and the rutting wheel 10. The counterweight 50 comprises multiple relatively detachably connected cast iron blocks, which are fixed together by long bolts (not shown in the figure) to achieve a detachable connection. Of course, for other specific structural arrangements regarding how the counterweights 50 are relatively connected and detached, refer to other counterweight structures in the existing rutting test device 1, which will not be elaborated here. Specifically, in this embodiment, under the gravity of the counterweight 50 and the rutting wheel 10, the pressure borne by the rutting plate 20 is 0.7 MPa, simulating the pressure of the rutting wheel 10 on the road surface in actual traffic.

[0059] By setting counterweight 50 and flexibly increasing or decreasing the number of cast iron blocks, the pressure value of the rutting wheel 10 on the rutting plate 20 can be precisely adjusted, so that it can simulate road conditions under various traffic loads from light vehicles to heavy vehicles, providing accurate test conditions for studying the influence of different loads on road rutting formation.

[0060] In this embodiment, the rutting test apparatus 1 also includes a heating pipe (not shown in the figure) and a temperature control module (not shown in the figure). The heating pipe is electrically connected to the temperature control module. Under the precise control of the temperature controller, various temperature environments can be created, even simulating the temperature conditions of the road surface in hot summer, making the rutting test closer to real road conditions, thereby more accurately studying the influence of temperature on rutting formation. Specifically, in this embodiment, the test temperature is set to 60°C through the heating pipe to simulate the deformation of the rutting slab 20 material under real working conditions.

[0061] In this embodiment, the rut testing device 1 further includes a transmission assembly 40. One end of the transmission assembly 40 is connected to the center 21 of the rut plate 20, and the other end is connected to the drive device 30. The transmission assembly 40 is used to transmit the power output by the drive device 30 to the rut plate 20. The transmission assembly 40 optimizes power transmission, improves equipment stability and reliability, reduces maintenance costs, and enhances equipment adaptability, thus ensuring the smooth conduct and accuracy of the rut test.

[0062] Specifically, in this embodiment, the transmission assembly 40 uses belt drive to transmit power, including a driven shaft 44, a transmission belt 45, a driving pulley 41, and a driven pulley 42. The driven pulley 42 is axially connected to the center 21 of the rut plate 20 via the driven shaft 44. The driving pulley 41 is axially connected to the drive device 30 via the power output shaft 43 of the drive device 30. The transmission belt 45 is sleeved between the driving pulley 41 and the driven pulley 42. Under the rotation of the driving pulley 41, the transmission belt 45 moves along the belt. Figure 1 The wheel rotates in the direction indicated by the middle arrow, causing the driven wheel 42 to rotate, which in turn drives the rut plate 20 along the path indicated by the middle arrow. Figure 1 The first direction A rotates counterclockwise. Of course, in other embodiments, the transmission component 40 can also use other power transmission methods existing in the prior art to realize the transmission connection between the drive device 30 and the rut plate 20, such as gear transmission, etc. Specific optional transmission schemes will not be described in detail here.

[0063] By adopting belt drive as the operating mode of transmission component 40, the operation of transmission component 40 is smoother and the noise is lower. During the rotating rut test, it can ensure that the rut plate 20 rotates at a relatively uniform speed, making the pressure applied by the rut wheel 10 on the rut plate 20 more stable, which is beneficial to improving the accuracy and reliability of the test. Furthermore, by using the output shaft of the drive device 30 as the drive shaft, there is no need for additional couplings, drive shafts, or other components to connect the drive device 30 and the drive wheel 41, reducing the number of parts in the device and providing more space and flexibility for the installation and arrangement of other components.

[0064] In this embodiment, a central hole (not shown in the figure) is opened at the center 21 of the rut plate 20, and a positioning keyway (not shown in the figure) is provided at one end of the driven shaft 44 connected to the central hole of the rut plate 20. A positioning key (not shown in the figure) is provided at the corresponding position of the central hole.

[0065] By utilizing the locating keyway and locating key, the relative position of the rut plate 20 and the driven shaft 44 can be precisely defined. This ensures that when the rut plate 20 is installed on the driven shaft 44, it is accurately positioned according to the design, guaranteeing that the center of the rut plate 20 coincides with the axis of the driven shaft 44. Furthermore, it effectively transmits the torque of the driven shaft 44 to the rut plate 20, allowing the rut plate 20 to rotate according to the set speed and trajectory under the drive of the driven shaft 44. This ensures the stability and accuracy of the rut plate 20 during rotation and improves the reliability of the test results.

[0066] During the test, the transmission belt 45 will continuously contact and rub against the driving wheel 41 and the driven wheel 42. Therefore, in this embodiment, the transmission belt 45 is specifically made of a composite material of rubber and fiber, which can ensure that it will not easily break or be overstretched and deformed under long-term, high-load working conditions, thus ensuring the stable operation of the test device.

[0067] In this embodiment, the transmission assembly 40 also includes a tensioning pulley (not shown in the figure), which is installed on the inner side of the transmission belt 45. During operation of this device, the transmission belt 45 may loosen due to wear, heat, etc. The tensioning pulley can be adjusted to keep the transmission belt 45 at a suitable tension. A suitable tension ensures sufficient friction between the transmission belt 45 and the driving pulley 41 and driven pulley 42, preventing slippage, ensuring efficient power transmission, and allowing the rutted plate 20 to rotate stably, avoiding deviations in test data due to loosening of the transmission belt 45.

[0068] In this embodiment, the drive device 30 includes a motor and a reducer (not shown in the figure). The motor is a variable frequency motor. The output shaft of the motor is connected to the drive wheel 41 of the transmission assembly 40 through the reducer. With the help of the reducer, the power of the high-speed rotating motor output shaft is reduced and output to the drive wheel 41 of the transmission assembly 40 in a relatively slower but higher torque manner. Through the transmission assembly 40, the rotational speed of the rut plate 20 around the center 21 is limited to within the range of 10-20 revolutions per minute. The rotational speed of the rut plate 20 is changed by changing the input frequency of the variable frequency motor. Specifically, in this embodiment, the rotational direction and speed of the rut plate 20 are set to counterclockwise (e.g., ...). Figure 1 The test speed is 10 revolutions per minute in the first direction (A) and the test duration is 1 hour to meet the testing requirements.

[0069] The variable frequency motor can change its operating frequency. By changing the operating frequency of the motor, with the help of the reducer, the rotation speed of the rutting plate 20 can be limited to the range of 10 to 20 revolutions per minute. This can meet the different requirements of the rotation speed of the rutting plate 20 under different types of road materials and test conditions, and can more realistically simulate the rutting effect of vehicles on the road surface at different driving speeds.

[0070] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A rut test device comprising a rut wheel, a rut plate, and a driving apparatus, the rut wheel being disposed and rolled on a surface of the rut plate, characterized by, The rut plate is connected with the driving device at the center of the rut plate, the contact point of the rut wheel is not coincided with the center of the rut plate, and the driving device drives the rut plate to rotate relative to the rut wheel around the center.

2. The rut testing device of claim 1, wherein, The rut test device further comprises a counterweight and a support assembly, the support assembly comprises a vertical rod, the lower end of the vertical rod is connected to the rut wheel, the upper end of the vertical rod is connected to the counterweight, the horizontal position of the vertical rod relative to the rut plate is limited, and the vertical position of the vertical rod relative to the rut plate is adjustable.

3. The track testing device of claim 2, wherein, The support assembly further comprises a fixed support and a jack, the fixed support is used for positioning on the ground, the fixed support carries the jack, and the jacking rod of the jack is connected to the counterweight. Alternatively, the rut test device further comprises a box body, and the support assembly further comprises a cross rod, one end of the cross rod is rotatably connected to the side surface of the box body, and the other end of the cross rod is connected to the vertical rod.

4. The track testing device of claim 2, wherein, The counterweight comprises a plurality of cast iron blocks which are relatively detachably connected.

5. The track testing device of claim 2, wherein, The rut test device further comprises a heating pipeline and a temperature control module, and the heating pipeline is electrically connected with the temperature control module.

6. The rut testing device of claim 1, wherein, The rut test device further comprises a transmission assembly, one end of the transmission assembly is connected to the center of the rut plate, and the other end of the transmission assembly is connected to the driving device, and the transmission assembly is used for transmitting the power output by the driving device to the rut plate.

7. The track testing device of claim 6, wherein, The transmission assembly comprises a driven shaft, a transmission belt, a driving wheel and a driven wheel, the driven wheel is axially connected with the center of the rut plate through the driven shaft, and the driving wheel is axially connected with the driving device through the power output shaft of the driving device.

8. The rut testing device of claim 7, wherein, A center hole is formed in the center of the rut plate, one end of the driven shaft connected with the center hole of the rut plate is provided with a positioning key groove, and the center hole is provided with a positioning key at a corresponding position.

9. The rut testing device of claim 7, wherein, The transmission belt is made of rubber and fiber composite material. Alternatively, the transmission assembly further comprises a tensioning wheel, and the tensioning wheel is installed on the inner side of the transmission belt.

10. The rut testing device of claim 1, wherein, The driving device comprises a motor and a speed reducer, the motor is a variable frequency motor, and the motor drives the rut plate to rotate around the center at a rotating speed of 10-20 revolutions per minute under the cooperation of the speed reducer.

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