Universal functional safety test platform for chassis

Abstract

The invention provides a chassis universal function safety test platform which comprises a platform plate, a roller, a clamping mechanism, an upper computer and a friction adjusting mechanism. The friction adjusting mechanism comprises magnetorheological fluid, a covering film, an electromagnetic coil array, an electric sliding table, a liquid pump, a filtering pipeline, a magnetic sieve plate, an L-shaped pipe, a transverse pipe, a telescopic pipe, an insertion pipe, a top plate, a first electric push rod and a conveying pipe, the wheels make contact with the magnetorheological fluid through the covering film, and a magnetic field generated by the electromagnetic coil array can change the state of the magnetorheological fluid; the magneto-rheological fluid can be switched between a liquid state and a semi-solid state, road surfaces with different friction coefficients are simulated, rich and comprehensive test scenes are provided, the accuracy of a chassis test result is improved, meanwhile, the magneto-rheological fluid can enter the filter pipeline under the action of the liquid pump, metal scraps are filtered through the magnetic sieve plates arranged in the filter pipeline in a gradient mode, and the test efficiency is improved. Failure caused by agglomeration effect is avoided, influence on magnetic field intensity is reduced, and accuracy of test results is further guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile detection, and in particular to a universal functional safety testing platform for chassis. Background Art

[0002] With the rapid development of intelligence and electrification in the automotive industry, the chassis system, as the core carrier of vehicle driving, steering, and braking, is subject to critical importance for its accuracy and comprehensive functional safety testing. At present, traditional chassis test platforms face significant challenges in simulating different road conditions, especially in adjusting the road friction coefficient. There are major technical bottlenecks. Existing solutions mostly use fixed friction coefficient materials, such as rubber, asphalt plates, etc., or use simple coatings, which make it difficult to achieve dynamic and precise control of the friction coefficient and unable to simulate the friction characteristics under complex road conditions such as ice, snow, accumulated water, and gravel. Some solutions use mechanical structure adjustment test devices, which have problems such as slow response speed and narrow adjustment range, and are difficult to meet the testing needs in extreme environments. There are defects such as incomplete test scenario coverage and insufficient data authenticity, which restricts the research and development and iteration efficiency of chassis technology. Summary of the Invention

[0003] In view of this, the present invention proposes a universal functional safety testing platform for chassis, in which the friction coefficient of the roller surface can be quickly adjusted, thereby providing a variety of different testing scenarios and improving the accuracy of chassis testing.

[0004] The technical solution of the present invention is achieved as follows: A universal functional safety test platform for chassis, comprising a platform plate, a roller, a clamping mechanism, a host computer and a friction adjustment mechanism, wherein an opening is provided on the upper surface of the platform plate, and several rollers are arranged in the opening, and their two ends are rotatably connected to the side walls of the opening, and the clamping mechanism is arranged on the platform plate and is symmetrical with the opening; the friction adjustment mechanism comprises a magnetorheological fluid, a covering film, an electromagnetic coil array, an electric slide, a liquid pump, a filter pipe, a magnetic sieve plate, an L-shaped tube, a horizontal tube, a telescopic tube, an insertion tube, a top plate, a first electric push rod and a conveying pipe, a retreat cavity is provided on the surface of the roller, the magnetorheological fluid is located in the retreat cavity, the covering film is coated on the outer surface of the roller, the electromagnetic coil array is arranged inside the roller and on the inner side of the retreat cavity, the electric slide is relatively arranged on the bottom surface of the platform plate, and its mover faces downward, and the liquid pump is provided. The bottom surface of the mover is placed on the electric slide, and both ends of the filter pipe are connected to the liquid pumps on both sides. The magnetic sieve plates are arranged at intervals in the filter pipe, and the magnetic field strength formed by several of the magnetic sieve plates increases along the flow direction of the liquid in the filter pipe. The L-shaped tube is connected to the liquid pump, one end of the horizontal tube is connected to the top of the L-shaped tube, and the other end is connected to the insertion tube through a telescopic tube. The top plate is arranged on the top surface of the insertion tube, and the first electric push rod is arranged on the top surface of the horizontal tube, and its output shaft is connected to the side wall of the top plate. The delivery pipe is arranged at the end of the roller, and one end of it extends into the retreat cavity. The side wall of the platform plate is provided with a through hole, and the through hole is located on one side of the insertion tube and on the side of the rotation path of the delivery pipe; the upper computer is arranged on one side of the platform plate, and is electrically connected to the clamping mechanism, the electromagnetic coil array, the electric slide, the liquid pump and the first electric push rod respectively.

[0005] Preferably, the friction adjustment mechanism further includes a valve, the valve is provided on the delivery pipe, and the host computer is electrically connected to the valve.

[0006] Preferably, the friction adjustment mechanism also includes an alignment mechanism, which includes a second electric push rod, a lifting plate, a motor and a drive wheel. The second electric push rod is arranged on the top surface of the filter pipe, and its output shaft is connected to the bottom surface of the lifting plate. The motor is arranged on the top surface of the lifting plate, and its output shaft is connected to the drive wheel. The drive wheel is located below the part of the drum where the retreat cavity is not set. The upper computer is electrically connected to the second electric push rod and the motor.

[0007] Preferably, the alignment mechanism further includes a receiving tube and a transmitting tube, the receiving tube is embedded in the side wall of the opening, the transmitting tube is embedded in the end of the roller, the receiving tube is located on one side of the rotation path of the transmitting tube, and the host computer is electrically connected to the receiving tube and the transmitting tube respectively.

[0008] Preferably, the friction adjustment mechanism further includes a bearing and a rotating shaft, wherein the bearing is embedded in the side wall of the opening, and the rotating shaft is arranged at the end of the roller and connected to the bearing.

[0009] Preferably, the clamping mechanism includes a mounting plate, a linear guide rail and a hydraulic clamp. The mounting plate is arranged on the platform plate and is symmetrical with an opening. The linear guide rail is arranged on the opposite side walls of the mounting plate. The hydraulic clamp is arranged on the mover of the linear guide rail. The upper computer is electrically connected to the linear guide rail and the hydraulic clamp respectively.

[0010] Preferably, the friction adjustment mechanism further includes a sealing rubber ring, and the sealing rubber ring is arranged on the outer wall of the insertion tube.

[0011] Preferably, the friction adjustment mechanism also includes a storage box, a replenishing pipe and a control valve. The storage box is arranged on the top surface of the filter pipe and stores magnetorheological fluid therein. The top end of the replenishing pipe is connected to the storage box, and the bottom end of the replenishing pipe is connected to the top surface of the filter pipe. The control valve is arranged on the replenishing pipe, and the upper computer is electrically connected to the control valve.

[0012] Preferably, it also includes a spraying mechanism, which includes a conveyor belt, a mobile box, a connecting pipe and an electric-controlled nozzle. The conveyor belt is arranged under the platform plate, and the mobile box is arranged on the upper surface of the conveyor belt, which stores pollutant liquid. The bottom end of the connecting pipe extends into the interior of the mobile box, and the top end is connected to the electric-controlled nozzle. The electric-controlled nozzle is located under the roller, and the upper computer is electrically connected to the conveyor belt and the electric-controlled nozzle respectively.

[0013] Preferably, the spraying mechanism also includes a third electric push rod, a supporting plate and a cleaning sponge. The third electric push rod is arranged on the top surface of the movable box, and its output shaft is connected to the bottom surface of the supporting plate. The cleaning sponge is arranged on the top surface of the supporting plate, and the host computer is electrically connected to the third electric push rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: ① Place the car chassis on a platform and make the tires contact the rollers. When the chassis is in operation, the tires can drive the rollers to rotate, simulating the movement of the car in situ, thereby testing the chassis performance. The electromagnetic coil array can provide a strong magnetic field, which causes the magnetorheological fluid to change its shape, adjust the friction coefficient, and simulate road surfaces with different friction coefficients. This provides multiple test scenarios and improves the accuracy of test results. ② The filter pipe can be driven to move by an electric slide. When the insertion tube is aligned with the through hole and the delivery pipe, the insertion tube can pass through the through hole and dock with the delivery pipe. Under the action of the liquid pump, the magnetorheological fluid enters the filter pipe and the metal debris in the magnetorheological fluid is filtered out through the gradient-set magnetic sieve plate to avoid agglomeration with the magnetorheological fluid, ensuring that the magnetorheological fluid can change its shape due to changes in the magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic structural diagram of a universal chassis functional safety test platform of the present invention; Figure 2 This is a schematic diagram of the connection structure between the friction adjustment mechanism and the platform plate of a universal chassis functional safety test platform of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; In the figure, 1, platform plate; 2, roller; 3, host computer; 4, opening; 5, magnetorheological fluid; 6, covering film; 7, electromagnetic coil array; 8, electric slide; 9, liquid pump; 10, filter pipe; 11, magnetic screen plate; 12, L-shaped pipe; 13, horizontal pipe; 14, telescopic pipe; 15, insertion pipe; 16, top plate; 17, first electric push rod; 18, delivery pipe; 19, retreat chamber; 20, through hole; 21, valve; 22, second electric push rod; 23, Lifting plate; 24. Motor; 25. Drive wheel; 26. Receiving tube; 27. Transmitting tube; 28. Bearing; 29. ​​Rotating shaft; 30. Mounting plate; 31. Linear guide; 32. Hydraulic clamp; 33. Sealing rubber ring; 34. Storage box; 35. Supplementary pipe; 36. Control valve; 37. Conveyor belt; 38. Moving box; 39. Connecting pipe; 40. Electric control nozzle; 41. Contaminated liquid; 42. Third electric push rod; 43. Loading plate; 44. Cleaning sponge. DETAILED DESCRIPTION

[0017] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0018] See also Figures 1 to 3The present invention provides a universal functional safety test platform for chassis, including a platform plate 1, a roller 2, a clamping mechanism, a host computer 3 and a friction adjustment mechanism. The upper surface of the platform plate 1 is provided with an opening 4, and several rollers 2 are arranged in the opening 4, and their two ends are rotatably connected to the side walls of the opening 4. The clamping mechanism is arranged on the platform plate 1 and is symmetrical with the opening 4; the friction adjustment mechanism includes a magnetorheological fluid 5, a covering film 6, an electromagnetic coil array 7, an electric slide 8, a liquid pump 9, a filter pipe 10, a magnetic sieve plate 11, an L-shaped tube 12, a horizontal tube 13, a telescopic tube 14, an insertion tube 15, a top plate 16, a first electric push rod 17 and a delivery pipe 18. A retreat cavity 19 is provided on the surface of the roller 2, the magnetorheological fluid 5 is located in the retreat cavity 19, the covering film 6 is coated on the outer surface of the roller 2, the electromagnetic coil array 7 is arranged inside the roller 2 and on the inner side of the retreat cavity 19, the electric slide 8 is relatively arranged on the bottom surface of the platform plate 1, and its mover faces downward. The liquid pump 9 It is arranged on the bottom surface of the mover of the electric slide 8, and the two ends of the filter pipe 10 are connected to the liquid pumps 9 on both sides. The magnetic sieve plates 11 are arranged at intervals in the filter pipe 10, and the magnetic field strength formed by several of the magnetic sieve plates 11 increases along the flow direction of the liquid in the filter pipe 10. The L-shaped tube 12 is connected to the liquid pump 9, one end of the horizontal tube 13 is connected to the top of the L-shaped tube 12, and the other end is connected to the insertion tube 15 through the telescopic tube 14. The top plate 16 is arranged on the top surface of the insertion tube 15, and the first electric push rod 17 is arranged on the top surface of the horizontal tube 13, and its output shaft is connected to the side wall of the top plate 16. The delivery pipe 18 is arranged at the end of the drum 2, and one end thereof extends into the retreat cavity 19. The side wall of the platform plate 1 is provided with a through hole 20, and the through hole 20 is located on one side of the insertion tube 15 and on the side of the rotation path of the delivery pipe 18; the upper computer 3 is arranged on one side of the platform plate 1, and is electrically connected to the clamping mechanism, the electromagnetic coil array 7, the electric slide 8, the liquid pump 9 and the first electric push rod 17 respectively.

[0019] A universal functional safety test platform for a chassis of the present invention is used to perform functional tests on a vehicle chassis, wherein the vehicle chassis is placed on a platform plate 1, and its wheels contact a roller 2 in an opening 4. The front and rear sides of the chassis are then clamped and fixed by a clamping mechanism. When the vehicle is started, the wheels on the chassis begin to rotate and drive the roller 2 to rotate, so that the vehicle can travel in place. Chassis test data can be obtained through data acquisition to evaluate the function of the chassis. A retreat chamber 19 is provided on the roller 2, and the retreat chamber 19 is located in the middle of the roller 2. A magnetorheological fluid 5 is encapsulated in the retreat chamber 19 and covered on the outside of the roller 2 by a covering film 6. The wheel will contact the magnetorheological fluid 5 through the covering film 6, and an electromagnetic coil array 7 is provided inside the roller 2. The host computer 3 can adjust the strength of the electromagnetic coil array 7, so that the magnetorheological fluid 5 switches between liquid and semi-solid states, adjusts the friction coefficient, and simulates roads with different friction coefficients, providing a comprehensive test scenario for chassis testing and improving the accuracy of test results.

[0020] During the long-term friction between the wheel and the drum 2, some metal debris will be generated in the magnetorheological fluid 5, which will affect the changes of the magnetorheological fluid 5. Therefore, after a period of use, the metal debris in the magnetorheological fluid 5 needs to be filtered. After the delivery pipe 18 on the side wall of the drum 2 is aligned with the through hole 20, the electric slide 8 drives the filter pipe 10 to move so that the insertion pipe 15 is located outside the through hole 20. Then, the first electric push rod 17 drives the insertion pipe 15 through the top plate 16 to stretch the telescopic pipe 14 and pass through the through hole 20 and dock with the delivery pipe 18. At this time, the filter pipe 10 and the retreat cavity 1 are 9 forms a loop. After starting the liquid pumps 9 on both sides, the magnetorheological fluid 5 in the retreat chamber 19 can be extracted and enter the filter pipe 10. The magnetic sieve plate 11 in the filter pipe 10 can filter the metal debris in the magnetorheological fluid 5. The magnetic sieve plate 11 adopts a gradient setting. The magnetorheological fluid 5 first passes through the magnetic sieve plate 11 with low magnetic field strength and finally flows out from the magnetic sieve plate 11 with the highest magnetic field strength, achieving efficient filtration of metal debris. Then, it returns to the retreat chamber 19 to ensure that the magnetic field generated by the electromagnetic coil array 7 can change the state of the magnetorheological fluid 5.

[0021] Preferably, the friction adjustment mechanism further includes a valve 21 , which is provided on the delivery pipe 18 , and the host computer 3 is electrically connected to the valve 21 .

[0022] The valve 21 is used to control the on / off of the delivery pipe 18 . When filtering is required, the valve 21 is opened. After the filtering is completed, the valve 21 is closed to prevent the magnetorheological fluid 5 from flowing out of the retreat chamber 19 .

[0023] Preferably, the friction adjustment mechanism also includes an alignment mechanism, which includes a second electric push rod 22, a lifting plate 23, a motor 24 and a drive wheel 25. The second electric push rod 22 is arranged on the top surface of the filter pipe 10, and its output shaft is connected to the bottom surface of the lifting plate 23. The motor 24 is arranged on the top surface of the lifting plate 23, and its output shaft is connected to the drive wheel 25. The drive wheel 25 is located below the part of the drum 2 where the retreat cavity 19 is not set. The upper computer 3 is electrically connected to the second electric push rod 22 and the motor 24.

[0024] The rotation of the wheel will drive the roller 2 to rotate, causing the conveying tube 18 to be unable to align with the through hole 20, and the second electric push rod 22 can drive the motor 24 to rise through the lifting plate 23, and the driving wheel 25 will rise synchronously with the motor 24 and contact the bottom surface of the roller 2. When the motor 24 is turned on, the driving wheel 25 will rotate, driving the roller 2 to rotate through friction, adjusting the position of the conveying tube 18 to one side of the through hole 20, ensuring that the insertion tube 15 can be smoothly docked with the conveying tube 18.

[0025] Preferably, the alignment mechanism also includes a receiving tube 26 and a transmitting tube 27, the receiving tube 26 is embedded in the side wall of the opening 4, the transmitting tube 27 is embedded in the end of the roller 2, the receiving tube 26 is located on one side of the rotation path of the transmitting tube 27, and the upper computer 3 is electrically connected to the receiving tube 26 and the transmitting tube 27 respectively.

[0026] In order to ensure that the conveying tube 18 and the through hole 20 can be accurately aligned, the present invention is provided with a receiving tube 26 and a transmitting tube 27. When the driving wheel 25 drives the roller 2 to rotate, the transmitting tube 27 will rotate synchronously. When the transmitting tube 27 rotates to the side of the receiving tube 26, the receiving tube 26 receives the infrared light and can send a signal to the upper computer 3. The upper computer 3 can stop the motor 24 and keep the roller 2 stationary. At this time, the conveying tube 18 and the through hole 20 are in an aligned state, ensuring that the insertion tube 15 can be smoothly docked with the conveying tube 18.

[0027] Preferably, the friction adjustment mechanism further includes a bearing 28 and a rotating shaft 29 . The bearing 28 is embedded in the side wall of the opening 4 , and the rotating shaft 29 is provided at the end of the drum 2 and connected to the bearing 28 .

[0028] When the drum 2 rotates, the rotating shaft 29 can rotate under the support of the bearing 28 to ensure that the wheel drives the drum 2 to rotate smoothly.

[0029] Preferably, the clamping mechanism includes a mounting plate 30, a linear guide rail 31 and a hydraulic clamp 32. The mounting plate 30 is arranged on the platform plate 1 and is symmetrical with the opening 4. The linear guide rail 31 is arranged on the opposite side wall of the mounting plate 30. The hydraulic clamp 32 is arranged on the mover of the linear guide rail 31. The upper computer 3 is electrically connected to the linear guide rail 31 and the hydraulic clamp 32 respectively.

[0030] When conducting chassis testing, it is necessary to avoid displacement during the test. Therefore, clamping mechanisms are set on the front and rear sides of the platform plate 1. The linear guide rail 31 can drive the hydraulic clamp 32 to rise and fall along the mounting plate 30 to adjust the position, and the hydraulic clamp 32 can clamp and fix the corresponding positions on the front and rear sides of the chassis to ensure that the chassis will not be offset during the test.

[0031] Preferably, the friction adjustment mechanism further includes a sealing rubber ring 33 , and the sealing rubber ring 33 is provided on the outer wall of the insertion tube 15 .

[0032] When the insertion tube 15 passes through the through hole 20 and docks with the delivery tube 18 , it will be inserted into the delivery tube 18 , and the sealing rubber ring 33 provided on the outer wall of the insertion tube 15 can achieve sealing to prevent the magnetorheological fluid 5 from flowing out of the gap between the insertion tube 15 and the delivery tube 18 .

[0033] Preferably, the friction adjustment mechanism also includes a storage box 34, a replenishing pipe 35 and a control valve 36. The storage box 34 is arranged on the top surface of the filter pipe 10, and magnetorheological fluid 5 is stored therein. The top end of the replenishing pipe 35 is connected to the storage box 34, and the bottom end thereof is connected to the top surface of the filter pipe 10. The control valve 36 is arranged on the replenishing pipe 35, and the upper computer 3 is electrically connected to the control valve 36.

[0034] During long-term use, the magnetorheological fluid 5 will be consumed and needs to be replenished. After the control valve 36 is opened, the new magnetorheological fluid 5 stored in the storage box 34 can flow into the filter pipe 10 through the replenishment pipe 35 and be transported to the retreat chamber 19 together with the filtered magnetorheological fluid 5, ensuring that the amount of magnetorheological fluid 5 is sufficient to achieve accurate adjustment of the friction coefficient.

[0035] Preferably, it also includes a spraying mechanism, which includes a conveyor belt 37, a movable box 38, a connecting pipe 39 and an electric-controlled nozzle 40. The conveyor belt 37 is arranged below the platform plate 1, and the movable box 38 is arranged on the upper surface of the conveyor belt 37, which stores pollutant liquid 41. The bottom end of the connecting pipe 39 extends into the interior of the movable box 38, and the top end thereof is connected to the electric-controlled nozzle 40. The electric-controlled nozzle 40 is located below the roller 2, and the upper computer 3 is electrically connected to the conveyor belt 37 and the electric-controlled nozzle 40 respectively.

[0036] In order to simulate a variety of different road conditions, a spraying mechanism is set at the bottom of the platform plate 1. The conveyor belt 37 can drive the mobile box 38 to move, so that the electric-controlled nozzle 40 moves to the bottom of different rollers 2. Then the electric-controlled nozzle 40 can extract the pollutant liquid 41 in the mobile box 38 through the connecting pipe 39 and spray it onto the surface of the roller 2. The pollutant liquid 41 is such as water or oil, which increases the diversity of the detection scenes and improves the accuracy of the detection results.

[0037] Preferably, the spraying mechanism also includes a third electric push rod 42, a supporting plate 43 and a cleaning sponge 44. The third electric push rod 42 is arranged on the top surface of the moving box 38, and its output shaft is connected to the bottom surface of the supporting plate 43. The cleaning sponge 44 is arranged on the top surface of the supporting plate 43, and the upper computer 3 is electrically connected to the third electric push rod 42.

[0038] The third electric push rod 42 can drive the supporting plate 43 to rise and make the cleaning sponge 44 contact the bottom surface of the roller 2. As the movable box 38 moves, the cleaning sponge 44 can drive the roller 2 to rotate and clean the pollutant liquid 41 attached to the surface of the roller 2 to restore the cleanliness of the roller 2, so that other pollutant liquids 41 can be re-sprayed or kept in a dry state for detection.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A universal chassis functional safety test platform, characterized by: It includes a platform plate, a roller, a clamping mechanism, a host computer and a friction adjustment mechanism. The upper surface of the platform plate is provided with an opening, and several rollers are arranged in the opening, and their two ends are rotatably connected to the side walls of the opening. The clamping mechanism is arranged on the platform plate and is symmetrical with the opening; the friction adjustment mechanism includes magnetorheological fluid, a covering film, an electromagnetic coil array, an electric slide, a liquid pump, a filter pipe, a magnetic screen plate, an L-shaped tube, a horizontal tube, a telescopic tube, an insertion tube, a top plate, a first electric push rod and a conveying pipe. A retreat cavity is provided on the surface of the roller, the magnetorheological fluid is located in the retreat cavity, the covering film is coated on the outer surface of the roller, the electromagnetic coil array is arranged inside the roller and on the inner side of the retreat cavity, the electric slide is relatively arranged on the bottom surface of the platform plate, and its mover is facing downward, and the liquid pump is arranged on the moving part of the electric slide. The bottom surface of the sub-tube, both ends of the filter pipe are connected to the liquid pumps on both sides, the magnetic sieve plates are arranged at intervals in the filter pipe, and the magnetic field strength formed by several of the magnetic sieve plates increases along the flow direction of the liquid in the filter pipe. The L-shaped tube is connected to the liquid pump, one end of the horizontal tube is connected to the top of the L-shaped tube, and the other end is connected to the insertion tube through a telescopic tube. The top plate is arranged on the top surface of the insertion tube, the first electric push rod is arranged on the top surface of the horizontal tube, and its output shaft is connected to the side wall of the top plate, the delivery pipe is arranged at the end of the roller, and one end thereof extends into the retreat cavity. The side wall of the platform plate is provided with a through hole, and the through hole is located on one side of the insertion tube and on the side of the rotation path of the delivery pipe; the upper computer is arranged on one side of the platform plate, and is electrically connected to the clamping mechanism, the electromagnetic coil array, the electric slide, the liquid pump and the first electric push rod respectively.

2. A universal chassis functional safety test platform according to claim 1, characterized in that: The friction adjustment mechanism further includes a valve, which is arranged on the delivery pipe, and the host computer is electrically connected to the valve.

3. The universal chassis functional safety test platform according to claim 1, characterized in that: The friction adjustment mechanism also includes an alignment mechanism, which includes a second electric push rod, a lifting plate, a motor and a driving wheel. The second electric push rod is arranged on the top surface of the filter pipe, and its output shaft is connected to the bottom surface of the lifting plate. The motor is arranged on the top surface of the lifting plate, and its output shaft is connected to the driving wheel. The driving wheel is located below the part of the drum where the retreat cavity is not provided. The upper computer is electrically connected to the second electric push rod and the motor.

4. A universal chassis functional safety test platform according to claim 3, characterized in that: The alignment mechanism also includes a receiving tube and a transmitting tube. The receiving tube is embedded in the side wall of the opening, and the transmitting tube is embedded in the end of the roller. The receiving tube is located on one side of the rotation path of the transmitting tube. The host computer is electrically connected to the receiving tube and the transmitting tube respectively.

5. The universal functional safety test platform for chassis according to claim 1, characterized in that: The friction adjustment mechanism further includes a bearing and a rotating shaft. The bearing is embedded in the side wall of the opening, and the rotating shaft is arranged at the end of the roller and connected to the bearing.

6. The universal functional safety test platform for chassis according to claim 1, characterized in that: The clamping mechanism includes a mounting plate, a linear guide rail and a hydraulic clamp. The mounting plate is arranged on the platform plate and is symmetrical with an opening. The linear guide rail is arranged on the opposite side walls of the mounting plate. The hydraulic clamp is arranged on the mover of the linear guide rail. The upper computer is electrically connected to the linear guide rail and the hydraulic clamp respectively.

7. The universal functional safety test platform for chassis according to claim 1, characterized in that: The friction adjustment mechanism further comprises a sealing rubber ring, which is arranged on the outer wall of the insertion tube.

8. The universal chassis functional safety test platform according to claim 1, characterized in that: The friction adjustment mechanism also includes a storage box, a replenishing pipe and a control valve. The storage box is arranged on the top surface of the filter pipe and stores magnetorheological fluid therein. The top end of the replenishing pipe is connected to the storage box, and the bottom end of the replenishing pipe is connected to the top surface of the filter pipe. The control valve is arranged on the replenishing pipe, and the upper computer is electrically connected to the control valve.

9. The universal chassis functional safety test platform according to claim 1, characterized in that: It also includes a spraying mechanism, which includes a conveyor belt, a mobile box, a connecting pipe and an electric-controlled nozzle. The conveyor belt is arranged under the platform plate, and the mobile box is arranged on the upper surface of the conveyor belt. The pollutant liquid is stored therein. The bottom end of the connecting pipe extends into the interior of the mobile box, and the top end thereof is connected to the electric-controlled nozzle. The electric-controlled nozzle is located under the roller, and the upper computer is electrically connected to the conveyor belt and the electric-controlled nozzle respectively.

10. The universal chassis functional safety test platform according to claim 9, characterized in that: The spraying mechanism also includes a third electric push rod, a supporting plate and a cleaning sponge. The third electric push rod is arranged on the top surface of the moving box, and its output shaft is connected to the bottom surface of the supporting plate. The cleaning sponge is arranged on the top surface of the supporting plate, and the host computer is electrically connected to the third electric push rod.

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