A tire slip ratio tester

Abstract

The present application relates to the technical field of tire detection, in particular to a tire slip rate testing machine, which can simulate the slip rate of the tires of a vehicle to be tested on a slope road at different angles by adjusting the inclination of two groups of friction plates, is convenient to use and has low limitations; comprising a bottom plate and a computer, the computer is placed on the bottom plate; further comprising a support plate, two groups of fixing plates, two groups of mounting plates, two groups of friction plates, two groups of pressure sensors, a distance adjusting device, an angle adjusting device, two groups of touch sensors A, two groups of touch sensors B, a tachometer, an upper platform device and a lower platform device, the support plate is installed on the bottom plate through the angle adjusting device, the angle adjusting device is used for adjusting the angle of the support plate, and the two groups of fixing plates are installed on the support plate through the distance adjusting device.

Description

Technical Field

[0001] This invention relates to the technical field of tire testing, and in particular to a tire slip ratio testing machine. Background Technology

[0002] Tire slip ratio, also known as slip factor, refers to the relative motion between the tire and the ground when the tire applies traction or braking force. The slip ratio is the proportion of the distance the wheel slides to the total distance the tire travels. The magnitude of the tire slip ratio can be used to estimate the strength of the tire's grip on the ground. Vehicles undergo tire slip ratio testing before leaving the factory to ensure vehicle safety during driving.

[0003] There are two main methods for testing vehicle tires in the existing technology: one is the roller reaction method, and the other is the flat plate braking test method. The roller reaction method deviates significantly from the actual road conditions during testing, so the flat plate braking test method is generally used at present. Most current flatbed brake test benches, such as those with patent application numbers "200420015591.1", "95212994.9", and "201822226552.0", mainly consist of two friction plates, a resistance sensor, and a distance sensor. When testing tire slip ratio, a tachometer is installed on the vehicle's power output shaft. The vehicle is then driven at a low speed onto the two friction plates, with the left and right wheels positioned on them respectively. Once on the friction plates, the tachometer is activated, continuously transmitting the real-time rotational speed of the vehicle's shaft to an external computer. The operator then applies the brakes, bringing the vehicle to a stop on the friction plates. By analyzing the shaft's rotational speed at various time points and the tire's diameter on the computer, the rolling distance of the tire on the friction plates can be inferred. The actual distance the tire moves on the friction plates is then measured. Based on this combined distance, the tire slip ratio can be determined. Simultaneously, the resistance sensor indicates the magnitude of the vehicle's braking force.

[0004] During its use, it was found that vehicles encounter various road conditions while driving. For example, on some mountain roads, some vehicles need to drive downhill continuously, so the road they drive on is inclined. Due to the influence of vehicle weight and gravity, the tire slip ratio on sloping roads and level roads is different. The aforementioned detection device is not convenient for detecting the tire slip ratio on sloping roads, and its use is highly limited, cannot adapt to various road conditions, and is inconvenient to use. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a tire slip ratio tester that can simulate the slip ratio of the tires of the test vehicle on a sloping road at different angles by adjusting the tilt of the two sets of friction plates (5). It is easy to use and has low limitations.

[0006] The tire slip ratio testing machine of the present invention includes a base plate and a computer, with the computer mounted on the base plate; it also includes a support plate, two sets of fixed plates, two sets of mounting plates, two sets of friction plates, two sets of pressure sensors, a distance adjustment device, an angle adjustment device, two sets of touch sensors A, two sets of touch sensors B, a tachometer, an upper platform device, and a lower platform device. The support plate is mounted on the base plate via the angle adjustment device, which is used to adjust the angle of the support plate. The two sets of fixed plates are mounted on the support plate via the distance adjustment device, which is used to adjust the distance between the two sets of fixed plates. Each set of fixed plates is provided with a slide rail. The two sets of mounting plates are slidably mounted on the two sets of fixed plates, respectively. The two sets of friction plates are fixedly mounted on the two sets of mounting plates, respectively. The two sets of pressure sensors... The sensors are fixedly installed on the left ends of the two sets of fixed plates. The sensing parts of the two sets of pressure sensors are connected to the left and right sides of the two sets of mounting plates, respectively. Touch sensors A are installed on the right side of each set of friction plates, and touch sensors B are installed on the left side of each set of friction plates. The lower and upper platforms are installed on the left and right sides of the base plate, respectively. When detecting the slip rate of a vehicle tire, the diameter of the tire is first measured, and then the tire diameter value is input into the computer. First, the two sets of touch sensors A are installed at the same position on the right side of each set of friction plates, and then the two sets of touch sensors B are installed at the same position on the left side of each set of friction plates. Then, touch sensors A and B are connected to the computer, and the slip rate of touch sensor A and touch sensor B is measured simultaneously. The distance of sensor B to the friction plate is measured. Then, a tachometer is installed on the axle of the vehicle under test. The tachometer and pressure sensor are connected to a computer. The angle of the support plate is adjusted using an angle adjustment device. The angle of the two sets of fixed plates is adjusted using the distance adjustment device. The two sets of fixed plates, through the two sets of mounting plates, adjust the two sets of friction plates to the specified tilt angle. The operator then drives the vehicle to be tested onto the upper platform at a constant speed. The vehicle is then driven to the left on the upper platform, onto the two sets of friction plates on the left side of the upper platform, with the front and rear wheels of the vehicle positioned on the two sets of friction plates respectively. Simultaneously, the operator on the vehicle applies the brakes to gradually decelerate the vehicle until it reaches the designated tilt angle. After the left wheel of the vehicle comes into contact with the touch sensor A on the right side of the two sets of friction plates, the touch sensor A transmits a signal to the computer. The computer then causes the tachometer to start recording the real-time rotational speed of the axle of the vehicle under test. When the left wheel of the vehicle under test comes into contact with the touch sensor B on the left side of the friction plate, the touch sensor B transmits a signal of contact between the left side of the vehicle and the touch sensor B to the computer. After that, the computer causes the tachometer to stop working. Then, the staff drives the vehicle to the lower device and drives the vehicle under test away. At the same time, the computer can calculate the rolling distance of the tire between the touch sensor A and the touch sensor B based on the tire diameter and the real-time rotational speed of the axle when the wheel moves between the touch sensor A and the touch sensor B, which is set as L2.The slip ratio of the tires of the vehicle under test is (L1-L2) / L1, and the real-time friction force of the tires on the friction plates can be inferred from the pressure values ​​displayed on the two sets of pressure sensors. Since the angle of the support plate can be adjusted via the angle adjustment device, and the tilt angle of the two sets of mounting plates can be adjusted via the distance adjustment device, the tilt degree of the two sets of friction plates can be adjusted via the two sets of mounting plates. By adjusting the tilt degree of the two sets of friction plates, the slip ratio of the tires of the vehicle under test on slopes at different angles can be simulated. This method is convenient to use and has few limitations.

[0007] Preferably, the distance adjustment device includes multiple sets of slide rails, multiple sets of sliders, two sets of support blocks, motor A, lead screw A, and two sets of connecting blocks. The multiple sets of slide rails are all fixedly mounted on the support plate. Multiple sets of sliders are fixedly mounted on the lower ends of the two sets of fixed plates. The two sets of fixed plates are slidably mounted on the multiple sets of slide rails via the multiple sets of sliders. The two sets of support blocks are all fixedly mounted on the support plate. Motor A is fixedly mounted on one set of support blocks. Lead screw A is rotatably mounted on the two sets of support blocks. The front end of lead screw A is connected to the output end of motor A. The front and rear parts of lead screw A are respectively provided with external threads of opposite directions. The two sets of connecting blocks are respectively connected to the front and rear parts of lead screw A. The device is screw-mounted, with two sets of connecting blocks fixedly installed on two sets of mounting plates. When testing the slip ratio of the tires of the vehicle under test, the distance between the two sets of friction plates is adjusted according to the wheelbase of the vehicle under test. Motor A is turned on, and motor A drives screw A to rotate. The rotating screw A drives the two sets of connecting blocks to move relative to each other. The two sets of connecting blocks, through the two sets of mounting plates, cause the two sets of friction plates to move relative to each other until the distance between the two sets of friction plates matches the wheelbase of the vehicle under test. It can adjust the distance between the two sets of friction plates according to the wheelbase of the vehicle under test, and can test vehicles with different wheelbases. It is convenient to use and has few limitations.

[0008] Preferably, the platform device includes an electric slide rail A, a sliding plate A, a track, an inclined plate A, and a lifting device. The electric slide rail A is installed on the right side of the base plate, and the sliding plate A is slidably installed on the electric slide rail A. The electric slide rail A is used to move the sliding plate A left and right. The track is installed on the sliding plate A via the lifting device, which has a lifting function. An inclined plate is provided on the right side of the track. When testing the slip rate of the vehicle to be tested, the lifting device first lowers the track, which in turn lowers the inclined plate A until the right end of the inclined plate A contacts the base plate. Then, the operator drives the vehicle across the right end of the inclined plate A onto the track. The height of the track is then adjusted according to the height of the right end of the friction plate to match the height of the right end of the friction plate. Then, the electric slide rail A moves the sliding plate A to the left, and the lifting device moves the track to the left until the left end of the track contacts the right end of the friction plate. Finally, the operator drives the vehicle at a certain speed across the track onto the friction plate. This facilitates moving the vehicle to be tested onto the friction plate and improves convenience.

[0009] Preferably, the lifting device includes multiple sets of hydraulic cylinders and multiple sets of push rods. The hydraulic cylinders are all fixedly mounted on the base plate, and each set of hydraulic cylinders is equipped with a push rod. The lower ends of the push rods are connected to the output ends of the hydraulic cylinders, and the upper ends of the push rods are fixedly mounted on the lower end of the track. All hydraulic cylinders are connected to a computer. When adjusting the track height, the computer controls the multiple sets of hydraulic cylinders to synchronously adjust the height of the push rods, thus adjusting the track height. This facilitates track height adjustment and improves convenience.

[0010] Preferably, the lowering device includes an electric slide rail B, a movable plate, a support plate, an inclined plate B, and a lifting mechanism. The electric slide rail B is mounted on the base plate, and the movable plate is mounted on the electric slide rail B. The electric slide rail B is used to move the movable plate left and right. The support plate is mounted on the movable plate via the lifting mechanism, and an inclined plate B is provided at the left end of the support plate. When testing the slip rate of the vehicle under test on the two sets of friction plates, the height of the support plate is first adjusted by the lifting mechanism until the height of the support plate is consistent with the height of the left end of the mounting plate. Then, the movable plate is moved to the right via the electric slide rail B, and the movable plate moves the support plate to the right via the lifting mechanism until the right end of the support plate contacts the left end of the two sets of fixed plates. After the vehicle has been tested on the friction plates, it slowly moves to the support plate and comes to a stop. Then, the movable plate is moved to the left until the inclined plate B is located to the left of the electric slide rail B. Then, the support plate is moved downward, and the support plate drives the inclined plate B to descend until the left end of the inclined plate B contacts the base plate. After that, the vehicle moves from the support plate to the base plate via the inclined plate B. This facilitates the movement of the vehicle under test and improves convenience.

[0011] Preferably, the lifting mechanism includes multiple sets of support columns and multiple sets of sliding columns. The multiple sets of support columns are all fixedly mounted on the movable plate. The lower parts of the multiple sets of sliding columns are slidably mounted up and down on the multiple sets of support columns. The support plate is fixedly mounted on the upper end of the multiple sets of sliding columns. A hydraulic cylinder is provided on the movable plate. The lower end of the hydraulic cylinder is fixedly mounted on the movable plate, and the moving end of the hydraulic cylinder is fixedly connected to the support plate. When adjusting the height of the support plate, the height of the support plate can be adjusted by the hydraulic cylinder.

[0012] Preferably, the angle adjustment device includes two sets of upright plates, two sets of support shafts, a bracket, rails, two sets of sliding blocks, a rotating shaft, bearing A, two sets of fixed blocks, a rotating shaft, bearing B, a connecting plate, and a moving device. The two sets of upright plates are fixedly installed on the front and rear parts of the base plate, respectively. The support shafts are rotatably installed on the two sets of upright plates. The lower end of the bracket is fixedly installed on the support shaft, and the upper end of the bracket is fixedly connected to the left side of the lower end of the support plate. The two sets of rails are fixedly installed on the front and rear parts of the base plate, respectively. The two sets of sliding blocks are slidably installed on the two sets of rails, respectively. The rotating shaft is rotatably installed on the two sets of sliding blocks. Bearing A is connected to the rotating shaft. The shaft is rotatably connected, and the moving device is used to move bearing A left and right. Two sets of fixed blocks are fixedly installed on the front and rear parts of the lower end of the support plate. The two sets of fixed blocks are located on the right side of the bracket. The rotating shaft is rotatably installed on the two sets of fixed blocks. Bearing B is rotatably connected to the rotating shaft. The upper and lower parts of the connecting plate are fixedly installed on bearing B and bearing A, respectively. When adjusting the tilt angle of the support plate, the moving device moves bearing A in the horizontal direction. Bearing A moves bearing B through the connecting plate. Bearing B tilts the support plate by moving the two sets of fixed blocks through the rotating shaft. This facilitates the adjustment of the support plate angle and improves convenience.

[0013] Preferably, the moving device includes a moving block, a lead screw B, two sets of supports, a servo motor, and the lead screw B. The moving block is fixedly installed at the lower end of the bearing A, and the moving block is screwed onto the lead screw B. The lead screw B is rotatably installed on the two sets of supports, both of which are fixedly installed on the base plate. The left end of the lead screw B is connected to the output end of the servo motor, and the servo motor is fixedly installed on the base plate. When the bearing A is moved, the servo motor is turned on, and the servo motor drives the lead screw B to rotate. The rotating lead screw B moves the bearing A in the left and right directions through the moving block. This facilitates the movement of the bearing A and improves convenience.

[0014] Preferably, it also includes two sets of pointers, which are respectively mounted on two sets of support shafts. Both sets of upright plates are provided with scales, and the two sets of pointers point to the scales on the two sets of upright plates. When the support plate is tilted, the support plate rotates the support shaft through the bracket, and the support shaft drives the pointer to rotate. The tilt angle of the support plate can be determined according to the value of the scale on the upright plate pointed to by the pointer, which improves convenience.

[0015] Preferably, the surface of the track is provided with friction strips; this feature prevents vehicles from slipping on the track and improves convenience.

[0016] The beneficial effects of this invention are: by adjusting the tilt of the two sets of friction plates, the slip rate of the tires of the test vehicle on a sloping road at different angles can be simulated, which is convenient to use and has low limitations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the isometric structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the hydraulic cylinder, support plate, and push rod, etc.

[0019] Figure 3 This is a structural diagram of the friction plate, motor A, and lead screw A, etc.

[0020] Figure 4 yes Figure 3 A magnified structural diagram of part A in the middle;

[0021] Figure 5 This is a structural diagram of the platform device;

[0022] Figure 6 It is a structural diagram of the pointer, slider, and track, etc.

[0023] Figure 7 It is a structural diagram of the rotating shaft, the fixed block, and the connecting plate, etc.

[0024] Figure 8 This is a schematic diagram of the main structure of the present invention;

[0025] The following are labels in the attached diagram: 1. Base plate; 2. Support plate; 3. Fixing plate; 4. Mounting plate; 5. Friction plate; 6. Pressure sensor; 7. Slide rail; 8. Slider; 9. Support block; 10. Motor A; 11. Lead screw A; 12. Connecting block; 13. Electric slide rail A; 14. Sliding plate A; 15. Track; 16. Inclined plate A; 17. Hydraulic cylinder; 18. Push rod; 19. Electric slide rail B; 20. Moving plate; 21. Support plate; 22. Inclined plate B; 23. Support column; 24. Sliding column; 25. Vertical plate; 26. Support shaft; 27. Bracket; 28. Track; 29. ​​Sliding block; 30. Rotating shaft; 31. Bearing A; 32. Fixing block; 33. Rotating shaft; 34. Bearing B; 35. Connecting plate; 36. Moving block; 37. Lead screw B; 38. Support; 39. Servo motor; 40. Pointer. Detailed Implementation

[0026] To facilitate understanding of the present invention, a clear, complete, and accurate description will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein; these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0027] Example 1

[0028] like Figures 1 to 8The tire slip ratio testing machine of the present invention includes a base plate 1, a computer, a support plate 2, two sets of fixing plates 3, two sets of mounting plates 4, two sets of friction plates 5, two sets of pressure sensors 6, a distance adjustment device, an angle adjustment device, two sets of touch sensors A, two sets of touch sensors B, a tachometer, an upper platform device, and a lower platform device. The computer is mounted on the base plate 1. The support plate 2 is mounted on the base plate 1 via the angle adjustment device, which is used to adjust the angle of the support plate 2. The two sets of fixing plates 3 are mounted on the support plate 2 via the distance adjustment device, which is used to adjust the angle of the two plates 5. The distance between the fixed plates 3 is such that each fixed plate 3 is provided with a slide rail, and the two mounting plates 4 are slidably mounted on the two fixed plates 3 respectively. The two friction plates 5 are fixedly mounted on the two mounting plates 4 respectively. The two pressure sensors 6 are fixedly mounted on the left end of the two fixed plates 3 respectively. The sensing parts of the two pressure sensors 6 are connected to the left and right parts of the two mounting plates 4 respectively. The right part of each of the two friction plates 5 is equipped with a touch sensor A, and the left part of each of the two friction plates 5 is equipped with a touch sensor B. The lower platform device and the upper platform device are respectively mounted on the left and right parts of the base plate 1.

[0029] When testing the slip ratio of vehicle tires, the diameter of the tires is first measured and then input into the computer. Two sets of touch sensors A are installed at the same position on the right side of each of the two sets of friction plates 5. Two sets of touch sensors B are then installed at the same position on the left side of each of the two sets of friction plates 5. Touch sensors A and B are then connected to the computer, and the distance between them on the friction plates 5 is measured. A tachometer is then installed on the axle of the vehicle under test. The tachometer and pressure sensor 6 are then connected to the computer. Finally, the support plate is adjusted using an angle adjustment device. At angle 2, the support plate 2 adjusts the angle of the two sets of fixed plates 3 through the distance adjustment device. The two sets of fixed plates 3, through the two sets of mounting plates 4, adjust the two sets of friction plates 5 to the specified tilt angle. Then, the staff drives the vehicle to be tested onto the upper platform at a constant speed. The vehicle to be tested is then driven to the left on the upper platform, and then driven onto the two sets of friction plates 5 on the left side of the upper platform, so that the front and rear wheels of the vehicle to be tested are respectively on the two sets of friction plates 5. At the same time, the staff on the vehicle to be tested steps on the brake to gradually decelerate the vehicle until the left wheel of the vehicle to be tested contacts the touch sensor A on the right side of the two sets of friction plates 5. Then, at this point, touch sensor A transmits a signal to the computer, which causes the tachometer to start recording the real-time rotational speed of the axle of the vehicle under test. Once the left wheel of the vehicle under test contacts touch sensor B on the left side of friction plate 5, touch sensor B transmits a signal indicating contact between the left side of the vehicle and touch sensor B to the computer. The computer then stops the tachometer. Afterwards, the operator drives the vehicle to the lower platform and drives it away. Simultaneously, the computer calculates the tire's rotational speed between touch sensors A and B based on the tire diameter and the real-time rotational speed of the axle as the wheel moves between touch sensors A and B. The rolling distance between the two sets of friction plates is set as L2; ​​that is, the slip ratio of the tire of the vehicle under test is (L1-L2) / L1. The real-time friction force of the vehicle tire when it travels on the friction plate 5 can be inferred from the pressure values ​​displayed on the two sets of pressure sensors 6. Since the angle of the support plate 2 can be adjusted by the angle adjustment device, the tilt angle of the two sets of mounting plates 4 can be adjusted by the distance adjustment device, and the tilt degree of the two sets of friction plates 5 can be adjusted by the two sets of mounting plates 4. By adjusting the tilt degree of the two sets of friction plates 5, the slip ratio of the tire of the vehicle under test on the slope at different angles can be simulated. It is convenient to use and has low limitations.

[0030] like Figure 3The distance adjustment device includes multiple sets of slide rails 7, multiple sets of sliders 8, two sets of support blocks 9, a motor A10, a lead screw A11, and two sets of connecting blocks 12. The multiple sets of slide rails 7 are all fixedly mounted on the support plate 2. Multiple sets of sliders 8 are fixedly mounted on the lower ends of the two sets of fixed plates 3. The two sets of fixed plates 3 are slidably mounted on the multiple sets of slide rails 7 via the multiple sets of sliders 8. The two sets of support blocks 9 are all fixedly mounted on the support plate 2. The motor A10 is fixedly mounted on one set of support blocks 9. The lead screw A11 is rotatably mounted on the two sets of support blocks 9. The front end of the lead screw A11 is connected to the output end of the motor A10. The front and rear parts of the lead screw A11 are respectively provided with external threads in opposite directions. The two sets of connecting blocks 12 are respectively connected to the lead screw A11. The front and rear screws are used to fix two sets of connecting blocks 12 on two sets of fixing plates 3 respectively. When testing the slip ratio of the tires of the vehicle under test, the distance between the two sets of friction plates 5 is adjusted according to the wheelbase of the vehicle under test. The motor A10 is turned on, and the motor A10 drives the lead screw A11 to rotate. The rotating lead screw A11 drives the two sets of connecting blocks 12 to move relative to each other. The two sets of connecting blocks 12, through the two sets of fixing plates 3, cause the two sets of mounting plates 4 to move relative to each other until the distance between the two sets of friction plates 5 is adapted to the wheelbase of the vehicle under test. It can adjust the distance between the two sets of friction plates 5 according to the wheelbase of the vehicle under test, and can test vehicles with different wheelbases. It is convenient to use and has low limitations.

[0031] like Figure 5 The platform includes an electric slide rail A13, a sliding plate A14, a track 15, an inclined plate A16, and a lifting device. The electric slide rail A13 is installed on the right side of the base plate 1. The sliding plate A14 is slidably installed on the electric slide rail A13, and the electric slide rail A13 is used to move the sliding plate A14 left and right. The track 15 is installed on the sliding plate A14 via the lifting device, which has a lifting function. An inclined plate is provided on the right side of the track 15. When testing the slip ratio of the vehicle under test, the lifting device first lowers the track 15, which in turn lowers the inclined plate A16 until the right end of the inclined plate A16 contacts the base plate 1. Afterwards, the staff drives the vehicle to the runway 15 via the right end of the ramp A16. Then, the height of the runway 15 is adjusted according to the height of the right end of the friction plate 5 so that the height of the runway 15 is consistent with the height of the right end of the friction plate 5. Then, the sliding plate A14 is moved to the left via the electric slide rail A13. The sliding plate A14 moves the runway 15 to the left via the lifting device until the left end of the runway 15 contacts the right end of the friction plate 5. Then, the staff drives the vehicle to the friction plate 5 at a certain speed via the runway 15. This makes it convenient to move the vehicle to be tested onto the friction plate 5 for testing and improves convenience.

[0032] The lifting device includes multiple sets of hydraulic cylinders 17 and multiple sets of push rods 18. All sets of hydraulic cylinders 17 are fixedly mounted on the base plate 1, and each set of hydraulic cylinders 17 is equipped with a push rod 18. The lower ends of the push rods 18 are connected to the output ends of the hydraulic cylinders 17, and the upper ends of the push rods 18 are fixedly mounted on the lower end of the track 15. All sets of hydraulic cylinders 17 are connected to a computer. When adjusting the height of the track 15, the computer controls the multiple sets of hydraulic cylinders 17 to synchronously adjust the height of the push rods 18, thus adjusting the height of the track 15. This facilitates the adjustment of the track 15's height and improves convenience.

[0033] like Figure 1 and Figure 2 The lower platform device includes an electric slide rail B19, a movable plate 20, a support plate 21, an inclined plate B22, and a lifting mechanism. The electric slide rail B19 is mounted on the base plate 1, and the movable plate 20 is mounted on the electric slide rail B19. The electric slide rail B19 is used to move the movable plate 20 left and right. The support plate 21 is mounted on the movable plate 20 via the lifting mechanism, and the inclined plate B22 is provided at the left end of the support plate 21. When the slip rate of the vehicle to be tested is detected on the two sets of friction plates 5, the height of the support plate 21 is first adjusted by the lifting mechanism until the height of the support plate 21 is consistent with the height of the left end of the mounting plate 4. Then, the movable plate is moved by the electric slide rail B19. Move plate 20 to the right, and the moving plate 20 moves the support plate 21 to the right through the lifting mechanism until the right end of the support plate 21 contacts the left end of the two sets of fixed plates 3. After the vehicle has completed the test on the friction plate 5, it slowly moves to the support plate 21 and comes to a stop. Then move plate 20 to the left until the inclined plate B22 is located to the left of the electric slide rail B19. Then move the support plate 21 down, and the support plate 21 drives the inclined plate B22 down until the left end of the inclined plate B22 contacts the bottom plate 1. Then the vehicle can move from the support plate 21 to the bottom plate 1 via the inclined plate B22. This facilitates the movement of the vehicle to be tested and improves convenience.

[0034] The lifting mechanism includes multiple sets of support columns 23 and multiple sets of sliding columns 24. The multiple sets of support columns 23 are all fixedly installed on the movable plate 20. The lower parts of the multiple sets of sliding columns 24 are slidably installed on the multiple sets of support columns 23. The support plate 21 is fixedly installed on the upper end of the multiple sets of sliding columns 24. A hydraulic cylinder is provided on the movable plate 20. The lower end of the hydraulic cylinder is fixedly installed on the movable plate 20, and the moving end of the hydraulic cylinder is fixedly connected to the support plate 21. When adjusting the height of the support plate 21, the height of the support plate 21 can be adjusted by the hydraulic cylinder.

[0035] like Figure 6 and Figure 7The angle adjustment device includes two sets of upright plates 25, a support shaft 26, a bracket 27, a track 28, two sets of sliding blocks 29, a rotating shaft 30, a bearing A31, two sets of fixed blocks 32, a rotating shaft 33, a bearing B34, a connecting plate 35, and a moving device. The two sets of upright plates 25 are fixedly installed on the front and rear parts of the base plate 1, respectively. The support shaft 26 is rotatably mounted on the two sets of upright plates 25. The lower end of the bracket 27 is fixedly mounted on the support shaft 26, and the upper end of the bracket 27 is fixedly connected to the left side of the lower end of the support plate 2. The two sets of tracks 28 are fixedly installed on the front and rear parts of the base plate 1, respectively. The two sets of sliding blocks 29 are slidably mounted on the two sets of tracks 28, respectively. The rotating shaft 30 is rotatably mounted on the two sets of sliding blocks 29. The bearing A31 is connected to the rotating shaft 35. Shaft 30 is rotatably connected, and a moving device is used to move bearing A31 left and right. Two sets of fixing blocks 32 are fixedly installed on the front and rear parts of the lower end of the support plate 2. The two sets of fixing blocks 32 are located on the right side of the bracket 27. Rotating shaft 33 is rotatably installed on the two sets of fixing blocks 32. Bearing B34 is rotatably connected to rotating shaft 33. The upper and lower parts of connecting plate 35 are fixedly installed on bearing B34 and bearing A31, respectively. When adjusting the tilt angle of support plate 2, the moving device moves bearing A31 in the horizontal direction. Bearing A31 moves bearing B34 through connecting plate 35. Bearing B34 tilts support plate 2 by rotating shaft 33 and causing the two sets of fixing blocks 32 to move. This facilitates the adjustment of the angle of support plate 2 and improves convenience.

[0036] The moving device includes a moving block 36, a lead screw B37, two sets of supports 38, a servo motor 39, and the lead screw B37. The moving block 36 is fixedly installed on the lower end of the bearing A31, and the moving block 36 is screwed onto the lead screw B37. The lead screw B37 is rotatably installed on the two sets of supports 38, and both sets of supports 38 are fixedly installed on the base plate 1. The left end of the lead screw B37 is connected to the output end of the servo motor 39, and the servo motor 39 is fixedly installed on the base plate 1. When the bearing A31 is moved, the servo motor 39 is turned on, and the servo motor 39 drives the lead screw B37 to rotate. The rotating lead screw B37 moves the bearing A31 in the left and right directions through the moving block 36. This facilitates the movement of the bearing A31 and improves convenience.

[0037] Example 2

[0038] Based on Embodiment 1, the lifting mechanism is replaced with a lifting platform. The lifting platform is mounted on the movable plate 20, and the support plate 21 is mounted on the lifting platform. Two sets of pointers 40 are added, each mounted on a support shaft 26. Both sets of upright plates 25 have graduations, and the pointers 40 point to these graduations. When the support plate 2 is tilted, the support plate 2 rotates the support shaft 26 via the bracket 27. The support shaft 26 then rotates the pointers 40. The tilt angle of the support plate 2 can be determined based on the value indicated by the pointers 40 on the graduations on the upright plates 25, improving convenience.

[0039] The main beneficial effects of this invention are:

[0040] 1. It can detect the slip rate of vehicle tires on sloping roads and is easy to use.

[0041] 2. It can inspect vehicles with different wheelbases.

[0042] 3. It facilitates the movement of vehicles.

[0043] 4. It makes it easy to intuitively know the slope's angle of inclination.

[0044] The friction plate 5, pressure sensor 6, motor A10, electric slide rail A13, electric slide rail B19, hydraulic cylinder 17, tachometer, computer, touch sensor, lead screw B37 and servo motor 39 of the tire slip ratio tester of the present invention are all commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A tire slip ratio testing machine, comprising a base plate (1) and a computer, wherein the computer is mounted on the base plate (1); characterized in that, It also includes a support plate (2), two sets of fixed plates (3), two sets of mounting plates (4), two sets of friction plates (5), two sets of pressure sensors (6), a distance adjustment device, an angle adjustment device, two sets of touch sensors A, two sets of touch sensors B, a tachometer, an upper platform device, and a lower platform device. The support plate (2) is mounted on the base plate (1) through the angle adjustment device, which is used to adjust the angle of the support plate (2). The two sets of fixed plates (3) are mounted on the support plate (2) through the distance adjustment device, which is used to adjust the distance between the two sets of fixed plates (3). (3) Slides are provided on both sides. Two sets of mounting plates (4) are slidably mounted on the two sets of fixed plates (3) respectively. Two sets of friction plates (5) are fixedly mounted on the two sets of mounting plates (4) respectively. Two sets of pressure sensors (6) are fixedly mounted on the left side of the two sets of fixed plates (3) respectively. The sensing parts of the two sets of pressure sensors (6) are connected to the left and right sides of the two sets of mounting plates (4) respectively. Touch sensors A are installed on the right side of the two sets of friction plates (5) and touch sensors B are installed on the left side of the two sets of friction plates (5) respectively. The lower platform device and the upper platform device are installed on the left and right sides of the base plate (1) respectively.

2. The tire slip ratio testing machine as described in claim 1, characterized in that, The distance adjustment device includes multiple sets of slide rails (7), multiple sets of sliders (8), two sets of support blocks (9), a motor A (10), a lead screw A (11), and two sets of connecting blocks (12). The multiple sets of slide rails (7) are all fixedly installed on the support plate (2). Multiple sets of sliders (8) are fixedly installed on the lower ends of the two sets of fixed plates (3). The two sets of fixed plates (3) are slidably mounted on the multiple sets of slide rails (7) via the multiple sets of sliders (8). The two sets of support blocks (9) are fixedly installed on the support plate (2). On the support plate (2), the motor A (10) is fixedly installed on one of the support blocks (9), and the lead screw A (11) is rotatably installed on the two support blocks (9). The front end of the lead screw A (11) is connected to the output end of the motor A (10). The front and rear parts of the lead screw A (11) are respectively provided with external threads with opposite directions of rotation. The two sets of connecting blocks (12) are respectively screwed to the front and rear parts of the lead screw A (11). The two sets of connecting blocks (12) are respectively fixedly installed on the two sets of fixing plates (3).

3. The tire slip ratio testing machine as described in claim 1, characterized in that, The platform device includes an electric slide rail A (13), a sliding plate A (14), a track (15), an inclined plate A (16), and a lifting device. The electric slide rail A (13) is installed on the right side of the base plate (1). The sliding plate A (14) is slidably installed on the electric slide rail A (13). The electric slide rail A (13) is used to move the sliding plate A (14) left and right. The track (15) is installed on the sliding plate A (14) through the lifting device. The lifting device has a lifting function. An inclined plate is provided on the right side of the track (15).

4. The tire slip ratio testing machine as described in claim 3, characterized in that, The lifting device includes multiple sets of hydraulic cylinders (17) and multiple sets of push rods (18). The multiple sets of hydraulic cylinders (17) are all fixedly installed on the base plate (1). Each set of hydraulic cylinders (17) is equipped with a push rod (18). The lower ends of the multiple sets of push rods (18) are respectively connected to the output ends of the multiple sets of hydraulic cylinders (17). The upper ends of the multiple sets of push rods (18) are all fixedly installed at the lower end of the runway (15). The multiple sets of hydraulic cylinders (17) are all connected to a computer.

5. A tire slip ratio testing machine as described in claim 1, characterized in that, The lower platform device includes an electric slide rail B (19), a movable plate (20), a support plate (21), an inclined plate B (22), and a lifting mechanism. The electric slide rail B (19) is installed on the base plate (1), the movable plate (20) is installed on the electric slide rail B (19), the electric slide rail B (19) is used to move the movable plate (20) left and right, the support plate (21) is installed on the movable plate (20) through the lifting mechanism, and the inclined plate B (22) is provided at the left end of the support plate (21).

6. A tire slip ratio testing machine as described in claim 5, characterized in that, The lifting mechanism includes multiple sets of support columns (23) and multiple sets of sliding columns (24). The multiple sets of support columns (23) are all fixedly installed on the moving plate (20). The lower parts of the multiple sets of sliding columns (24) are slidably installed on the multiple sets of support columns (23) respectively. The support plate (21) is fixedly installed on the upper end of the multiple sets of sliding columns (24). A hydraulic cylinder is provided on the moving plate (20). The lower end of the hydraulic cylinder is fixedly installed on the moving plate (20). The moving end of the hydraulic cylinder is fixedly connected to the support plate (21).

7. A tire slip ratio testing machine as described in claim 1, characterized in that, The angle adjustment device includes two sets of upright plates (25), two sets of support shafts (26), a bracket (27), a track (28), two sets of sliding blocks (29), a rotating shaft (30), bearing A (31), two sets of fixing blocks (32), a rotating shaft (33), bearing B (34), a connecting plate (35), and a moving device. The two sets of upright plates (25) are respectively fixedly installed on the front and rear parts of the base plate (1). The support shafts (26) are rotatably installed on the two sets of upright plates (25). The lower end of the bracket (27) is fixedly installed on the support shaft (26). The upper end of the bracket (27) is fixedly connected to the left part of the lower end of the support plate (2). The two sets of tracks (28) are respectively fixedly installed on the base plate (1). The front and rear parts of the support plate (2) are respectively mounted on the two sets of sliding blocks (29) and the two sets of tracks (28). The rotating shaft (30) is rotatably mounted on the two sets of sliding blocks (29). The bearing A (31) is rotatably connected to the rotating shaft (30). The moving device is used to move the bearing A (31) left and right. The two sets of fixing blocks (32) are fixedly mounted on the front and rear parts of the lower end of the support plate (2). The two sets of fixing blocks (32) are located on the right side of the bracket (27). The rotating shaft (33) is rotatably mounted on the two sets of fixing blocks (32). The bearing B (34) is rotatably connected to the rotating shaft (33). The upper and lower parts of the connecting plate (35) are respectively fixedly mounted on the bearing B (34) and the bearing A (31).

8. A tire slip ratio testing machine as described in claim 7, characterized in that, The moving device includes a moving block (36), a lead screw B (37), two sets of supports (38), a servo motor (39), and a lead screw B (37). The moving block (36) is fixedly installed on the lower end of the bearing A (31). The moving block (36) is screwed to the lead screw B (37). The lead screw B (37) is rotatably installed on the two sets of supports (38). Both sets of supports (38) are fixedly installed on the base plate (1). The left end of the lead screw B (37) is connected to the output end of the servo motor (39). The servo motor (39) is fixedly installed on the base plate (1).

9. A tire slip ratio testing machine as described in claim 7, characterized in that, It also includes two sets of pointers (40), which are respectively installed on two sets of support shafts (26). Both sets of vertical plates (25) are equipped with scales, and the two sets of pointers (40) point to the scales on the two sets of vertical plates (25).

10. A tire slip ratio testing machine as described in claim 3, characterized in that, The surface of the runway (15) is provided with friction strips.

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