Obstacle crossing driving characteristic test device for planetary wheel under high and low temperature environment

Abstract

The application discloses a kind of star planet wheel high-low temperature environment under the obstacle driving characteristic test device of running, device is by test tank, running ground, obstacle, ultralow temperature medium, high temperature heating device, drive structure, measurement and control system and control panel composition;The rack of drive structure is set on test tank, running ground is paved in test tank, obstacle is set on running ground, ultralow temperature medium is set in the low temperature zone of test tank, high temperature heating device is set to the high temperature zone side of test tank, and the drive system of drive structure is connected with the rack cooperation, measurement and control system are laid and device and the wheel to be measured on, control panel is fixed on the rack, and is electrically connected with drive system, measurement and control system and high temperature heating device.The application can simulate the real running state of wheel under ultralow temperature environment, including loading running, obstacle, drop impact etc., while the impact of cold and hot cycle on wheel can be observed.

Description

Technical Field

[0001] This invention relates to the field of device testing technology, and more specifically to a test device for the obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments. Background Technology

[0002] The lunar environment experiences significant diurnal temperature variations. During the day, due to sunlight and other factors, the lunar surface temperature rises above 100°C, while at night it reaches -190°C. Chang'e 7 will land on the lunar poles, and its rover will need to navigate in this extreme temperature environment, including obstacle crossing. To ensure the rover's reliability, testing its planetary wheels under extreme temperature conditions is essential. Current research on the structural performance of planetary wheels includes low-temperature or high-temperature impact tests under stationary wheel conditions and high- and low-temperature driving tests under simulated lunar soil conditions. However, these tests cannot observe the wheel's performance under harsh road conditions of extreme temperatures, nor can they directly verify the structural strength and reliability of the planetary wheels under such conditions.

[0003] Therefore, how to conduct obstacle crossing tests on wheels in high and low temperature environments is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a test device for the obstacle crossing driving characteristics of planetary vehicle wheels under high and low temperature environments, which helps to evaluate the structural characteristics of planetary vehicle wheels under multiple road conditions in high and low temperature environments.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments includes a test tank, an ultra-low temperature medium, a driving surface, a high temperature heating device, a drive structure, a measurement and control system, and a control panel. The driving surface is laid in the test tank. The driving surface includes a high area, a buffer zone, and a depression zone, with the buffer zone located between the high area and the depression zone. Obstacles are placed in the depression zone. The ultra-low temperature medium fills the depression zone. The drive structure is slidably connected to the test tank and moves along the driving surface. The high temperature heating device, the drive structure, and the measurement and control system are all electrically connected to the control panel.

[0007] The technical effect of the above solution is that the test trough section corresponding to the depression area of ​​the driving ground constitutes a low temperature zone, and the test trough section corresponding to the high area constitutes a high temperature zone. The high temperature, low temperature and obstacle crossing test conditions are combined in the same test device. The drive structure puts the wheel under test under different test conditions of the test device, thereby completing the obstacle crossing driving characteristics test of the planetary wheel in high and low temperature environments. The buffer zone is used to isolate the temperature and avoid heat transfer between the high area and the depression area, which would prevent the temperature from rising or falling. After crossing the obstacle, there is no buffer, and there is a direct change in terrain. The wheel falls directly by gravity, thereby realizing the drop impact test.

[0008] Preferably, the test groove is a rectangular recess; the drive structure includes a frame and a drive system, the frame is located above the test groove and is fixedly connected to the side wall of the test groove; the drive system includes a guide frame, a bearing seat, a mounting plate, a drive motor, a synchronous chain, and a transmission shaft; the guide frame is slidably connected to the crossbeam slide rail of the frame and slidably connected to the mounting plate through the bearing seat; the synchronous chain is provided with an outer shell, the outer shell and the drive motor are both fixed on the mounting plate, the drive motor is connected to the synchronous chain at one end of the outer shell, and the transmission shaft is connected to the synchronous chain at the other end of the outer shell, the transmission shaft can be connected to drive the wheel under test;

[0009] The guide frame includes a U-shaped end and a sliding rod. The U-shaped end is slidably connected to the crossbeam slide rail of the frame by means of a pulley. The sliding rod is sleeved in the bearing seat fixed on the mounting plate and can move up and down.

[0010] The technical effects of the above-mentioned technical solution are as follows: the wheel under test is mounted on the drive shaft and driven by the drive motor to travel along the ground. At the same time, the drive system follows the wheel under test and slides along the crossbeam slide rail of the frame. When crossing obstacles, the bearing seat slides relative to the guide frame, and the wheel under test can move up and down. The speed of the drive motor can be adjusted as needed through the control panel, thereby adjusting the rotation speed of the wheel under test. At the same time, the drive motor is mounted on the mounting plate, which can protect the drive motor from the temperature changes when the wheel passes through hot and cold zones, and can also provide counterweight to the wheel as needed.

[0011] Preferably, the two ends of the driving surface are the high areas, the middle section is the recessed area, and two buffer zones are respectively provided at both ends of the recessed area to connect the high areas; the buffer zones are inclined planes that connect the high areas and the recessed areas; the recessed areas, the buffer zones, and the inner wall of the test tank form a receiving cavity, which is filled with the cryogenic medium.

[0012] The technical effect of the above solution is that obstacle crossing test of the wheel under test can be realized in the recessed area. At the same time, the cavity formed by the recessed area and the test groove can be filled with ultra-low temperature medium to realize low temperature environment switching, and the wheel under test can achieve rapid cooling when passing through the recessed area.

[0013] Preferably, the high-temperature heating device is an arc-shaped heating cover with heating tubes installed on its inner wall. These heating tubes are electrically connected to the control panel. The high-temperature heating device can be detachably placed on a high area of ​​the driving surface, covering the wheel to be tested for rapid heating.

[0014] The technical effect of the above solution is that in high-altitude areas of the driving ground, the test wheel can be heated by a high-temperature heating device, thereby achieving a high-temperature environment switch.

[0015] Preferably, the test groove is an annular groove; the drive structure includes a frame and a drive system, with the frame located at the center of the test groove; the drive system includes a guide frame, a bearing seat, a mounting plate, a drive motor, a synchronous chain, and a transmission shaft; the guide frame is sleeved on the frame and rotatably connected to the frame, and slidably connected to the mounting plate via the bearing seat; the synchronous chain is externally provided with a housing, and both the housing and the drive motor are fixed on the mounting plate; the drive motor is connected to the synchronous chain at one end of the housing, and the transmission shaft is connected to the synchronous chain at the other end of the housing; the transmission shaft can drive the wheel under test.

[0016] The guide frame is a T-shaped plate. The horizontal plate of the T-shaped plate is rotatably connected to the frame, and the vertical plate is slidably connected to the mounting plate through a bearing seat fixed to the mounting plate, which can realize the up and down movement of the mounting plate.

[0017] Preferably, the test tank is an annular groove, and the high-temperature heating device is an arc-shaped heating cover, fixed on the test tank and located above the high area, with heating pipes provided on the inner wall.

[0018] Preferably, the test groove is an annular groove, with the high areas of the driving surface laid in the test groove serving as buffer zones at both ends and a recessed area between the two buffer zones. The wheel under test can rotate unidirectionally within the annular groove to achieve high and low temperature testing.

[0019] Preferably, the measurement and control system includes several temperature sensors, several proximity sensors, and timers; the temperature sensors are installed on the driving ground, distributed in the high areas and buffer zones, and the temperature sensors are also distributed on the wheels under test; the measured end of one set of proximity sensors is installed on the guide frame, and the sensing end is installed on the crossbeam slide rail of the frame corresponding to the recessed area; the measured ends of two sets of proximity sensors are both installed on the guide frame, and the sensing ends are respectively installed on the crossbeam slide rails of the frame corresponding to the two high areas; timers are installed on the crossbeam slide rails of the frame corresponding to the recessed area and the high area, and the timers are connected to the sensing ends and the control panel; the temperature sensors and the proximity sensors are both connected to the control panel.

[0020] The technical effect of the above technical solution is that a temperature sensor can be installed in the wheel under test and electrically connected to the control panel; the temperature sensor can sense the ambient temperature of the wheel and the test tank; the proximity sensor can sense the position of the wheel under test; the control panel can control the wheel to stay in the concave area and the high area, respectively to cool down and heat up the wheel under test; and the timer is used to record the dwell time.

[0021] The control panel is used by the test personnel to operate the test procedures. It can set the number of tests, the dwell time in the low temperature zone and the high temperature heating zone, the wheel speed, etc., and can control the start and stop of the test at any time.

[0022] Preferably, the measurement and control system includes several temperature sensors, several proximity sensors, and timers; the temperature sensors are installed on the driving ground and are distributed in the high areas and buffer zones; the measured ends of one set of proximity sensors are installed on the guide frame, and the sensing ends are installed on the frame corresponding to the recessed area; the measured ends of two sets of proximity sensors are both installed on the guide frame, and the sensing ends are respectively installed on the frames corresponding to the two high areas; timers are installed on both the recessed area and the frame corresponding to the high area, and the timers are connected to the sensing ends and the control panel.

[0023] Preferably, the mounting plate is provided with a counterweight to apply downward pressure to the wheel under test during testing.

[0024] Preferably, the driving surface is made of a material that is relatively soft and can maintain its structural properties even at a low temperature of -200℃.

[0025] Preferably, the cryogenic medium is liquid nitrogen.

[0026] Preferably, the obstacle has a large surface friction, which allows the wheel to pass over the obstacle smoothly. The obstacle is set in the low temperature zone of the test tank, which can be used to study the obstacle-crossing characteristics of the wheel under low temperature and high temperature transition environments.

[0027] Preferably, the length of the low-temperature zone formed by the test groove section corresponding to the depression area of ​​the driving surface should be greater than the circumference of the wheel being tested.

[0028] Preferably, the ultra-low temperature medium submerges the obstacle. After the wheel passes the obstacle at the point where it enters the low temperature zone, the wheel stops and is immersed in the ultra-low temperature medium until the wheel temperature drops to -196°C.

[0029] Preferably, the high-temperature zone formed by the test tank section corresponding to the high-temperature zone is continuously heated by a high-temperature heating device. After the wheel reaches the high-temperature zone, the wheel is kept still until the wheel temperature rises to a preset high temperature of not less than 25°C.

[0030] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a test device for the obstacle crossing driving characteristics of planetary wheels under high and low temperature environments, which can simulate the real driving state of wheels under ultra-low temperature environments, including loaded driving, obstacle crossing, drop impact, etc., and can also simulate cold and hot cycle impact. It has a simple structure and accurate testing. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 The attached figure is a schematic diagram of the obstacle-crossing driving characteristics test process of the planetary wheel under high and low temperature environments provided by the present invention;

[0033] Figure 2 The attached figure is a schematic diagram of the obstacle-crossing driving characteristics test device for linear planetary wheels under high and low temperature environments provided by the present invention.

[0034] Figure 3 The attached figure is a schematic diagram of the structure of the test device for obstacle crossing characteristics of the annular planetary wheel under high and low temperature environments provided by the present invention.

[0035] Figure 4 The attached figure is a cross-sectional schematic diagram of the obstacle-crossing driving characteristics test device for the ring-shaped planetary wheel under high and low temperature environments provided by the present invention.

[0036] Figure 5 The attached figure is a schematic diagram of the drive system structure provided by the present invention.

[0037] In the attached diagram: 1-Control panel, 2-Test tank, 3-Driving ground, 4-Obstacle, 5-Cryogenic medium, 6-High temperature heating device, 71-Drive system, 711-Guide frame, 712-Bearing seat, 713-Mounting plate, 714-Drive motor, 715-Drive shaft, 716-Housing, 72-Frame, 8-Measurement and control system, 81-Sensing end, 82-Temperature sensor. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] This invention discloses a test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments, including a test tank 2, an ultra-low temperature medium 5, a driving surface 3, a high temperature heating device 6, a drive structure, a measurement and control system 8, and a control panel 1; the driving surface 3 is laid in the test tank 2; the driving surface 3 includes a high area, a buffer zone, and a depression zone, the buffer zone is located between the high area and the depression zone, and obstacles 4 are set in the depression zone; the ultra-low temperature medium 5 is filled in the depression zone; the drive structure is slidably connected to the test tank 2 and moves along the driving surface 3; the high temperature heating device 6, the drive structure, and the measurement and control system 8 are all electrically connected to the control panel 1.

[0040] To further optimize the above technical solution, the test tank 2 is a rectangular groove; the drive structure includes a frame 72 and a drive system 71. The frame 1 is located above the test tank 2 and is fixedly connected to the side wall of the test tank 2; the drive system includes a guide frame 711, a bearing seat 712, a mounting plate 713, a drive motor 714, a synchronous chain, and a transmission shaft 715; the guide frame 711 is slidably connected to the crossbeam slide rail of the frame 72, and is slidably connected to the mounting plate 713 through the bearing seat 712; the synchronous chain is provided with a housing 716, and both the housing 716 and the drive motor 714 are fixed on the mounting plate 713. The drive motor 714 is connected to the synchronous chain at one end of the housing 716, and the transmission shaft 715 is connected to the synchronous chain at the other end of the housing 716. The transmission shaft 715 can be connected to drive the wheel under test.

[0041] The guide frame 711 includes a U-shaped end and a sliding rod. The U-shaped end is slidably connected to the crossbeam slide rail of the frame 72 by means of a pulley. The sliding rod is sleeved in the bearing seat 712 fixed on the mounting plate 713, and can move up and down.

[0042] To further optimize the above technical solution, the two ends of the driving ground 3 are high areas, the middle section is a depression area, and two buffer zones are set at the two ends of the depression area to connect the high areas; the buffer zone is an inclined plane that connects the high areas and the depression area; the depression area, the buffer zone and the inner wall of the test tank form a cavity, which is filled with ultra-low temperature medium 5.

[0043] To further optimize the above technical solution, the high-temperature heating device 6 is an arc-shaped heating cover with heating pipes installed on its inner wall. The heating pipes are electrically connected to the control panel 1. The high-temperature heating device can be detachably placed on a high area of ​​the driving ground, covering the wheel to be tested for rapid heating.

[0044] To further optimize the above technical solution, the measurement and control system includes several temperature sensors 82, several proximity sensors, and timers. Temperature sensors 82 are installed on the driving surface, deployed in high areas and buffer zones, and on the wheel under test. The measured end of one set of proximity sensors is mounted on a guide frame, and the sensing end 81 is mounted on the crossbeam slide rail of the frame corresponding to the depression area. The measured ends of two sets of proximity sensors are both mounted on the guide frame, and the sensing ends 81 are respectively mounted on the crossbeam slide rails of the frames corresponding to the two high areas. Timers are installed on the crossbeam slide rails of the frames corresponding to the depression areas and high areas, and the timers are connected to the sensing ends and the control panel 1. The temperature sensors 82 and proximity sensors are all connected to the control panel 1. The temperature sensors 82 on the wheel under test are used to monitor whether the wheel has reached a predetermined temperature when it is located in a depression area for cooling. The temperature sensors 82, proximity sensors, and timers are all connected to the control panel 1 via wired or wireless means.

[0045] To further optimize the above technical solution, the test groove is an annular groove; the drive structure includes a frame 72 and a drive system 71, with the frame 72 located at the center of the test groove 2; the drive system 71 includes a guide frame 711, a bearing seat 712, a mounting plate 713, a drive motor 714, a synchronous chain, and a transmission shaft 715; the guide frame 711 is sleeved on the frame 72 and rotatably connected to the frame 72, and slidably connected to the mounting plate 713 through the bearing seat 712; the synchronous chain is provided with a housing 716, and both the housing 716 and the drive motor 714 are fixed on the mounting plate 713. The drive motor 714 is connected to the synchronous chain at one end of the housing 716, and the transmission shaft 715 is connected to the synchronous chain at the other end of the housing 716. The transmission shaft 715 can be connected to drive the wheel under test;

[0046] The guide frame 711 is a T-shaped plate. The horizontal plate of the T-shaped plate is rotatably connected to the frame 72. The vertical plate is slidably connected to the mounting plate 713 through the bearing seat 712 fixed to the mounting plate 713, which can realize the up and down movement of the mounting plate 73.

[0047] To further optimize the above technical solution, the test tank 2 is an annular groove, and the high-temperature heating device 6 is an arc-shaped heating cover, which is fixed on the test tank and located above the high area, with heating pipes installed on the inner wall.

[0048] To further optimize the above technical solution, the test groove 2 is an annular groove. The high areas of the driving surface laid in the test groove are buffer zones at both ends, and the area between the two buffer zones is a recessed area. The wheel under test can rotate unidirectionally in the annular groove to achieve high and low temperature testing.

[0049] To further optimize the above technical solution, the test groove 2 is an annular groove. The measured end of one set of proximity sensors is installed on the guide frame 711, and the sensing end 81 is installed on the frame 72 corresponding to the recessed area. The measured ends of two sets of proximity sensors are both installed on the guide frame 711, and the sensing ends 81 are respectively installed on the frames 72 corresponding to the two high areas. Timers are installed on the frames 72 corresponding to the recessed area and the high area.

[0050] To further optimize the above technical solution, a counterweight is provided on the mounting plate 713.

[0051] To further optimize the above technical solution, the driving ground 3 is made of a material that is relatively soft and can still maintain its structural properties at a low temperature of -200℃.

[0052] To further optimize the above technical solution, the cryogenic medium 5 uses liquid nitrogen.

[0053] To further optimize the above technical solution, the surface friction of obstacle 4 is large, which allows the wheel to cross the obstacle smoothly. Obstacle 4 is set in the low temperature zone of test tank 2, which can be used to study the obstacle crossing characteristics of the wheel under low temperature and high temperature transition environments.

[0054] To further optimize the above technical solution, the length of the low-temperature zone formed by the test groove section corresponding to the depression area of ​​the driving ground 3 should be greater than the circumference of the wheel being tested.

[0055] To further optimize the above technical solution, the cryogenic medium 5 submerges the obstacle 4. After the wheel passes the obstacle at the point where it enters the cryogenic zone, the wheel stops and is immersed in the cryogenic medium until the wheel temperature drops to -196°C.

[0056] To further optimize the above technical solution, the high-temperature zone formed by the test tank section corresponding to the high-temperature area is continuously heated by a high-temperature heating device for the wheel under test. After the wheel reaches the high-temperature zone, the wheel is kept still until the wheel temperature rises to a preset high temperature of not less than 25°C.

[0057] Example 1

[0058] The working process of the test device is as follows: Initially, the wheel under test is located in the high-temperature zone at one end. The wheel under test is preheated to the preset high temperature. The test is started through the control panel. The drive motor drives the wheel under test to rotate. When the wheel under test passes the obstacle at the low-temperature zone, the proximity sensor at that point is triggered and transmits a signal to stop the drive motor. After the wheel under test stays for a specified time, the wheel temperature drops to -196℃. The drive motor continues to work and drives the wheel under test to rotate. When the wheel under test reaches the high-temperature heating zone, the proximity sensor at that point is triggered and transmits a signal to stop the drive motor. After the wheel under test stays for a specified time, the wheel temperature rises to the preset high temperature. The drive motor continues to work and drives the wheel under test to rotate, and the next test is conducted. In this way, the wheel under test moves back and forth in the test tank to complete the test. The wear condition of the wheel surface is observed to determine whether the wheel still has the function of driving under this harsh environment.

[0059] Example 2

[0060] A test device for the obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments can be adopted. The test platform has a linear test bench structure, with the test bench arranged from front to back as a high-temperature zone, a buffer zone, a low-temperature zone, a buffer zone, and a high-temperature zone. The wheel can undergo continuous reciprocating tests within the test bench to observe its structural characteristics. A cover or curtain can be added to the low-temperature zone of the test bench to block water vapor and prevent water mist from forming inside the test device, thus preventing the observation of the wheel's condition. A camera device can also be added to record and monitor the test process in real time.

[0061] Example 3

[0062] A test device for the obstacle-crossing driving characteristics of planetary wheels under high and low temperature environments can adopt a ring-shaped rotary test bench structure. The low-temperature zone of the test chamber is connected to the high-temperature heating zone through a buffer zone, allowing the wheel to undergo unidirectional continuous testing within the test bench to observe its structural characteristics. A cover or curtain can be added to the low-temperature zone of the test bench to block water vapor and prevent water mist from forming inside the test device, which would obstruct observation of the wheel's condition. A camera device can also be added to record and monitor the test process in real time.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments, characterized in that, It includes a test chamber, an ultra-low temperature medium, a driving surface, a high temperature heating device, a drive structure, a measurement and control system, and a control panel; the driving surface is laid inside the test chamber; The driving surface includes a high area, a buffer zone, and a depression zone, with the buffer zone located between the high area and the depression zone; obstacles are provided in the depression zone; and the cryogenic medium is filled in the depression zone. The drive structure is slidably connected to the test tank and moves along the driving surface; The high-temperature heating device, the driving structure, and the measurement and control system are all electrically connected to the control panel. The high-temperature heating device is an arc-shaped heating cover with heating tubes installed on its inner wall. The heating tubes are electrically connected to the control panel. The high-temperature heating device can be detachably installed in the high-temperature area.

2. The test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments according to claim 1, characterized in that, The test groove is a rectangular parallelepiped groove; The drive structure includes a frame and a drive system. The frame is located above the test tank and is fixedly connected to the side wall of the test tank. The drive system includes a guide frame, a bearing housing, a mounting plate, a drive motor, a synchronous chain, and a transmission shaft. The guide frame is slidably connected to the crossbeam slide rail of the frame and slidably connected to the mounting plate through the bearing housing. The synchronous chain is provided with an outer shell, and both the outer shell and the drive motor are fixed on the mounting plate. The drive motor is connected to the synchronous chain at one end of the outer shell, and the transmission shaft is connected to the synchronous chain at the other end of the outer shell. The transmission shaft can be connected to drive the wheel under test. The guide frame includes a U-shaped end and a sliding rod. The U-shaped end is slidably connected to the crossbeam slide rail of the frame by means of a pulley. The sliding rod is sleeved in the bearing seat fixed on the mounting plate.

3. The test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments according to claim 2, characterized in that, The two ends of the driving surface are the high areas, and the middle section is the recessed area. Two buffer zones are respectively set at both ends of the recessed area to connect the high areas. The buffer zones are inclined planes that connect the high areas and the recessed areas. The recessed areas, the buffer zones, and the inner wall of the test tank form a receiving cavity, which is filled with the ultra-low temperature medium.

4. The obstacle-crossing driving characteristic test device for a planetary wheel under high and low temperature environments according to claim 1, characterized in that, The test groove is an annular groove; The drive structure includes a frame and a drive system, with the frame located at the center of the test tank. The drive system includes a guide frame, a bearing housing, a mounting plate, a drive motor, a synchronous chain, and a transmission shaft. The guide frame is sleeved on the frame and rotatably connected to it, and slidably connected to the mounting plate via the bearing housing. The synchronous chain is externally fitted with a housing, and both the housing and the drive motor are fixed to the mounting plate. The drive motor is connected to the synchronous chain at one end of the housing, and the transmission shaft is connected to the synchronous chain at the other end of the housing. The transmission shaft can be connected to drive the wheel under test. The guide frame is a T-shaped plate, with the horizontal plate of the T-shaped plate rotatably connected to the frame and the vertical plate slidably connected to the mounting plate through a bearing seat fixed to the mounting plate.

5. The obstacle-crossing driving characteristic test device for a planetary wheel under high and low temperature environments according to claim 4, characterized in that, The high-level areas of the driving surface paved in the annular groove serve as buffer zones at both ends, and the area between the two buffer zones is a recessed area. The wheel under test rotates unidirectionally within the annular groove.

6. A test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments according to claim 2 or 4, characterized in that, The measurement and control system includes several temperature sensors, several proximity sensors, and timers. The temperature sensors are installed on the driving surface, distributed in high-altitude areas and buffer zones, and on the wheels under test. One set of proximity sensors has its measured end mounted on the guide frame, and its sensing end mounted on the frame corresponding to the recessed area. Two sets of proximity sensors have their measured ends mounted on the guide frame, and their sensing ends mounted on the frames corresponding to the two high-altitude areas respectively. Timers are installed on both the recessed area and the frame corresponding to the high-altitude area, and the timers are connected to the sensing ends and the control panel. The temperature sensors and proximity sensors are both connected to the control panel.

7. A test device for obstacle-crossing driving characteristics of a planetary wheel under high and low temperature environments according to claim 2 or 4, characterized in that, The mounting plate is equipped with a counterweight.

Images