A vehicle-mounted tire testing test bench

Abstract

The utility model discloses a vehicle -mounted tire test test board, it includes loading vehicle and installs test board on loading vehicle, and is installed with the tire of being measured on test board, and the tire of being measured is top and is resisted on ground, is installed with the measuring device of measuring the tire of being measured of being measured on the tire of being measured, and the lateral inclination mechanism of allowing the tire of being measured to occur and the roll mechanism of allowing the tire of being measured to occur, and this test board can monitor the pressure, resistance and ground six partial force of tire rolling in real time, provide timely, accurate data support for vehicle performance optimization, and it has adjustable mechanism, can change the installation angle of tire, thereby realize the simulation of multiple complex conditions such as lateral inclination and roll, and test the test board in actual driving process, truly reflect the performance of tire under various road conditions, have more practical significance.

Description

Technical Field

[0001] This utility model relates to the field of tire testing equipment, and in particular to a vehicle-mounted tire testing bench. Background Technology

[0002] During vehicle operation, the resistance and related torque experienced by the tires during rolling are crucial factors affecting fuel economy and handling performance. Therefore, tire design often involves testing various tires to determine their mechanical properties. Traditional tire testing benches commonly include indoor fixed test benches and drum test benches. Indoor fixed test benches typically mount tires on fixed supports, simulating tire working conditions by applying various forces and movements. However, this type of test bench has some limitations. First, it cannot fully simulate the complex working conditions of tires in actual road driving, such as road surface unevenness, dynamic load changes, and wind resistance. Second, due to the difference between the testing environment and the actual usage environment, the test results may not accurately reflect the tire's performance in real-world driving. Drum test benches place the tire on a rotating drum for testing. While this type of test bench can simulate the rolling state of tires to some extent, it also has shortcomings. It is difficult to accurately reproduce the dynamic characteristics of a vehicle in actual driving. Furthermore, the test results from drum test benches may be affected by factors such as the surface characteristics of the drum and the rotation speed, thus impacting the accuracy and reliability of the test data. Therefore, it is necessary to improve the existing tire testing bench and design a test bench that can better meet the complex needs of comprehensive and accurate testing of tire performance. Utility Model Content

[0003] The purpose of this invention is to provide a vehicle-mounted tire testing bench that can directly and in real time measure the resistance, pressure, and ground contact force of a tire outdoors, and can also measure the variable rolling force at multiple angles, providing data support for the performance optimization and safety assurance of vehicle tires.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is:

[0005] A vehicle-mounted tire testing bench includes a loading vehicle and a testing bench mounted on the loading vehicle. A tire to be tested is mounted on the testing bench and rests against the ground. A measuring device for measuring the force on the tire to be tested is mounted on the tire to be tested. A lateral deflection mechanism and a tilting mechanism for causing the tire to be tested to tilt are mounted on the testing bench.

[0006] Preferably, the loading vehicle is a vehicle moving in a straight line, and the tire to be tested is installed at the center of the bottom of the loading vehicle.

[0007] Preferably, the test bench is equipped with the tire to be tested via a hydraulic system, which presses the tire to be tested against the ground.

[0008] Preferably, the measuring device is a six-component force sensor installed on the tire to be tested.

[0009] Preferably, the test bench includes a second base plate and a first base plate that are parallel to each other vertically. The first base plate is rotatably mounted on the loading vehicle, and the second base plate is detachably mounted on the first base plate. The lateral tilting mechanism is mounted on the first base plate, and the lateral tilting mechanism is mounted on the second base plate.

[0010] Preferably, the first base plate is rotatably mounted on the loading vehicle via a first bearing about a vertical axis. The lateral deflection mechanism includes a lateral deflection gear mounted on the bottom surface of the first base plate and an arc-shaped rack fixedly mounted on the loading vehicle. The arc-shaped rack meshes with the lateral deflection gear. The mechanism also includes a first servo motor for controlling the rotation of the lateral deflection gear.

[0011] Preferably, the tilting mechanism includes a third base plate that can be flipped and mounted on the second base plate, the axis around which the third base plate flips is parallel to the direction of vehicle travel, the tire to be tested is mounted on the third base plate, the plane in which the tire rolls is parallel to the direction of vehicle travel, and also includes a second servo motor for controlling the flipping of the third base plate.

[0012] Preferably, the third base plate is fixedly provided with a flipping platform at both ends, and the second base plate is fixedly provided with a motor bracket at both ends on the upper surface of the second base plate. The second servo motor is installed in the motor bracket, and the output shaft of the second servo motor is fixedly installed on the flipping platform. The flipping platform is rotatably installed on the flipping table bracket through a second bearing, and the flipping table bracket is fixedly installed on the upper surface of the second base plate.

[0013] Preferably, the flipping platform includes two long strip-shaped clamping plates and a connecting block connecting the two clamping plates, and the upper surface of the second base plate is also provided with a clamping device that can lock the positions of the two ends of the clamping plates.

[0014] Preferably, the test bench mounts the tire to be tested via a hydraulic system. A mounting base is fixedly mounted on the upper surface of the third base plate. The mounting base has a horizontal mounting through hole with its axis perpendicular to the vehicle's direction of travel. A C-shaped bent tube is fixedly inserted into the mounting through hole. The lower end of the bent tube is inserted into the center of the tire to be tested. A hydraulic cylinder is fixedly mounted on the lower surface of the first base plate. A hydraulic push rod is mounted below the hydraulic cylinder. The output end of the hydraulic push rod is mounted at the lower end of the bent tube near the tire to be tested.

[0015] After adopting the above scheme, the vehicle-mounted tire testing bench has the following significant advantages:

[0016] Installing a six-component force sensor on the tire can monitor the pressure, resistance, and ground force on the tire in real time, providing timely and accurate data support for vehicle performance optimization.

[0017] The test bench has an adjustable mechanism that can change the tire mounting angle, thereby simulating various complex working conditions such as side slip and roll. This allows for a more comprehensive understanding of tire performance under various complex conditions, providing more information for in-depth research on tire performance and optimization of vehicle design.

[0018] Vehicle-mounted tire testing benches can conduct tests during actual driving, realistically reflecting tire performance under various road conditions, including different road surface conditions, vehicle speed, load, etc., making the test results more practically meaningful. Attached Figure Description

[0019] Figure 1 This is a front view of an embodiment of the present utility model;

[0020] Figure 2 This is a perspective view of an embodiment of the present utility model;

[0021] Figure 3 This is a perspective view of a second-view embodiment of the present invention;

[0022] Figure 4 This is a perspective view of an embodiment of the present invention from a third perspective;

[0023] Figure 5 This is a bottom view of an embodiment of the present utility model;

[0024] Figure 6 This is a perspective view of the test bench side-shifting device according to an embodiment of this utility model;

[0025] Figure 7 This is a bottom view of the test bench according to an embodiment of the present invention;

[0026] Figure 8 This is a perspective view of the test bench tilting device according to an embodiment of this utility model;

[0027] Figure 9 This is a top view of the test bench tilting device according to an embodiment of this utility model;

[0028] Figure 10 This is a perspective view of the installation of the tire to be tested according to an embodiment of this utility model;

[0029] Figure 11 This is a front view of the tire to be tested in an embodiment of this utility model. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] This invention proposes a vehicle-mounted tire testing bench, comprising a loading vehicle 1 and a testing bench 2 mounted on the loading vehicle 1. The testing bench 2 is a mobile platform that carries out tire testing functions, and can be implemented using a modular steel structure frame. A tire 9 to be tested is mounted on the testing bench 2, with the tire 9 resting against the ground. A measuring device 5 for measuring the force on the tire 9 is mounted on the tire 9. Unlike existing fixed testing benches and rotary drum testing benches, the testing bench 2 involved in this invention can most realistically reproduce the dynamic load changes and road conditions of the tire during driving. The measuring device 5 is integrated into the tire 9 to be tested mounted on the loading vehicle 1. During the movement of the loading vehicle 1, the dynamic response data of the tire 9 on the actual road surface can be acquired simultaneously. Furthermore, the test bench 2 is equipped with a lateral slip mechanism 3 that causes the test tire 9 to lateral slip, and a tilt mechanism 4 that causes the test tire 9 to tilt. The lateral slip mechanism 3 is a device that controls the deflection of the tire plane relative to the vehicle's direction of travel, thereby generating a controllable lateral slip angle for the test tire 9. The tilt mechanism 4 is a device that adjusts the tilt of the tire around its axis of travel, thereby simulating the tilting posture of the vehicle when cornering by tilting the mounting plane of the test tire 9. Through the lateral slip mechanism 3 and the tilt mechanism 4, the tire posture is actively adjusted on the loaded vehicle 1, thereby effectively simulating complex working conditions such as vehicle steering and center of gravity shift, and obtaining force analysis and test data of the test tire under these working conditions.

[0032] To simplify the testing process on the test bench 2, the loading vehicle 1 can be designed as a linearly moving vehicle, with the test tire 9 mounted at the center of the bottom of the loading vehicle 1. Linear movement here means that the vehicle itself can only move back and forth along a single, predetermined straight line. The loading vehicle 1 does not have a steering mechanism. This design simplifies the loading vehicle 1 and avoids interference with test data due to changes in direction during travel. The loading vehicle 1 includes two sets of tires, front and rear, and is primarily driven by the rear wheels 11. Both the front wheels 12 and the rear wheels 11 are mounted on the chassis of the loading vehicle 1 via axles 13 and bearings fitted onto the axles 13. The two axles 13 connected to the two rear wheels 11 are connected together by a coupling 14 and are controlled by a drive motor 15 to rotate and propel the loading vehicle 1 forward. The drive motor 15 is connected to the coupling 14 via a differential 16. The power generated by the drive motor 15 is effectively transmitted to the differential 16, which, through the coupling 14, transmits the power from the differential 16 to the axle 13 connected to the tire, thereby driving the rear wheel 11 to rotate and propelling the loading vehicle 1 forward. The center position of the bottom of the loading vehicle 1 refers to the geometric center area where the longitudinal axis and the transverse axis of the vehicle intersect. The test tire 9 is located in the center area, ensuring that the load distribution on the test tire 9 is symmetrical during driving, reducing torque errors caused by positional deviations. When the loading vehicle 1 is in motion, the force state of the test tire 9 is consistent with the actual driving conditions of the vehicle, such as during acceleration, braking, or constant speed. The measuring device 5 can directly collect the dynamic response data of the test tire 9.

[0033] The test bench 2 is mounted on the loading vehicle 1 via a test bench support plate 17. The loading vehicle 1 has a hollowed-out central area, and the test bench support plate 17 is erected above the hollowed-out area to mount the test bench 2. The raised test bench support plate 17 provides space for the tire 9 to be tested. The test bench 2 includes a second base plate 22 and a first base plate 21 that are parallel to each other. The first base plate 21 is rotatably mounted on the loading vehicle 1, and the second base plate 22 is detachably mounted on the first base plate 21. A side-tilting mechanism 3 is mounted on the first base plate 21, and a side-tilting mechanism 4 is mounted on the second base plate 22.

[0034] Specifically, the first base plate 21 is the basic support platform for the entire test bench 2. The first base plate 21 is rotatably mounted on the loading vehicle 1 via the first bearing 24 around a vertical axis. More specifically, the first base plate 21 can be made of steel plate and is rotatably mounted on the test bench support plate 17 of the loading vehicle 1. The first base plate 21 and the test bench support plate 17 can be connected by the first bearing 24, allowing the first base plate 21 to rotate around the central axis of the first bearing 24. The first base plate 21 has a central hole and a first bearing 24 and a support shaft seat 25 are installed thereon. The first bearing 24 can be a deep groove ball bearing. The deep groove ball bearing is embedded in the central hole and fixed to the center of the first base plate 21, while the inner ring is fixed to the support shaft seat 25. The support shaft seat 25 is fixed to the test bench support plate 17. The fixed connection in the device can be fixed by welding or bolts, a method known to those skilled in the art and will not be described further. Furthermore, to ensure that the first base plate 21 maintains the required working angle during the experiment after deflection, limiters 26 can be installed on both sides of the first base plate 21. The limiters 26 can be detachable right-angled steel plates fixed to the test bench support plate 17. Friction components are provided between the right-angled steel plates and the first base plate 21. By adjusting the friction between the friction components and the first base plate 21, the position of the first base plate 21 can be locked and unlocked. The limiters 26 can be detachably installed using bolts. During the experiment, after the first base plate 21 deflects to a certain working angle, the position of the fixed limiters 26 is adjusted to maintain the deflected working angle of the first base plate 21. In addition, to reduce friction between the first base plate 21 and the test bench support plate 17 during deflection, four universal balls 27 can be installed on the lower surface of the first base plate 21. The universal balls 27 reduce friction while providing support for the first base plate 21.

[0035] The lateral deflection mechanism 3 includes a lateral deflection gear 31 mounted on the bottom surface of the first base plate 21 and an arc-shaped rack 32 fixedly mounted on the loading vehicle 1. The arc-shaped rack 32 and the lateral deflection gear 31 mesh. It also includes a first servo motor 33 that controls the rotation of the lateral deflection gear 31. Specifically, the arc-shaped rack 32 is bolted to the test bench support plate 17, and the first servo motor 33 is bolted to the upper surface of the first base plate 21. A through hole is formed in the first base plate 21, and the output shaft of the first servo motor 33 passes through the through hole and fixes the lateral deflection gear 31 to the lower surface of the first base plate 21. A bearing can also be provided between the output shaft of the first servo motor 33 and the first base plate 21. When the first servo motor 33 starts, it drives the lateral deflection gear 31 to rotate. The lateral deflection gear 31 moves along the arc-shaped rack 32, causing the first base plate 21 to deflect around the central axis of the first bearing 24, i.e., the center of the arc-shaped rack 32.

[0036] The second base plate 22 is a separable platform superimposed on the first base plate 21. The second base plate 22 can also be made of steel plate. The second base plate 22 is fixed by eight fasteners 28 fixed to the upper surface of the first base plate 21, so that the second base plate 22 tilts synchronously with the first base plate 21, thereby causing other structures installed on the second base plate 22 and the tire 9 to be tested to tilt.

[0037] A tilting mechanism 4 is installed on the second base plate 22. The tilting mechanism 4 includes a third base plate 23 that can be flipped and installed on the second base plate 22. When the first base plate 21 does not tilt at the working angle, the axis around which the third base plate 23 flips is parallel to the direction of vehicle travel. Specifically, the two ends of the third base plate 23 are fixedly provided with a flipping platform 41. The flipping platform 41 is a support structure that supports the flipping movement of the third base plate 23. Each flipping platform 41 includes two long strip-shaped clamping plates 42 and a connecting block 43 connecting the two clamping plates 42. The connecting block 43 can be made of right angle steel. The upper surface of the second base plate 22 is also provided with a clamping device 44. The clamping device 44 can lock the position of the two ends of the clamping plate 42. In order to ensure that the clamping device 44 can still clamp the two ends of the clamping plate 42 when the third base plate 23 deflects, the two ends of the clamping plate 42 can be designed as arcs. Furthermore, the arc structure at both ends of the clamping plate 42 can be marked with scales. Combined with the structural design of the clamping plate 42, the tilt angle of the entire third base plate 23 can be easily viewed. It also includes a second servo motor 45 for controlling the rotation of the third base plate 23. The rotation control of the rotating platform 41 can be achieved through the servo motor. Specifically, motor brackets 46 are fixedly installed at both ends of the upper surface of the second base plate 22. Two sets of rotating platform brackets 47 are provided inside the two motor brackets 46, and each set of rotating platform brackets 47 supports one rotating platform 41. The second servo motor 45 is installed inside the motor bracket 46. The output shaft of the second servo motor 45 is fixedly installed on the rotating platform 41. The rotating platform 41 is rotatably installed on the rotating platform bracket 47 through a second bearing 48. The second bearing 48 can also be a deep groove ball bearing. The second bearing 48 at the top of the rotating platform bracket 47 provides a stable rotation fulcrum for the rotating platform 41. When the second servo motor 45 outputs rotation, it can drive the rotation of the rotating platform 41 fixedly connected to it. The rotating platform bracket 47 is fixedly installed on the upper surface of the second base plate 22. When it is necessary to detect relevant data of the tires in a tilted state, the second servo motor 45 precisely controls the tilting angle of the third base plate 23. After the two sets of tilting platforms 41 are adjusted synchronously, the two second servo motors 45 are made to rotate synchronously in opposite directions, thereby causing the two sets of tilting platforms 41 to tilt in the same direction. The third base plate 23 then drives the other mechanisms installed on it to enter the tilting state synchronously.

[0038] The tire under test 9 is mounted on the third base plate 23. The test bench 2 is equipped with the tire under test 9 via a hydraulic system 6, which presses the tire under test 9 against the ground. The hydraulic system 6 is a mechanism that controls the contact pressure between the tire under test 9 and the ground through a hydraulic drive device. Specifically, it can be implemented using a hydraulic cylinder 65, a hydraulic pump 66, and a control valve group. The contact state between the tire and the ground is changed by adjusting the hydraulic oil flow and pressure. The pressing of the tire under test 9 by the hydraulic system 6 is to maintain stable contact between the tire and the ground and apply a controllable vertical load. Specifically, this is achieved by driving the tire under test 9 to move vertically through a hydraulic push rod 61. The downward pressure of the tire under test 9 is adjusted within the stroke range of the hydraulic cylinder. During installation, a mounting base 62 is fixedly mounted on the upper surface of the third base plate 23. The mounting base 62 has a horizontally opened mounting through hole 63 with its axis perpendicular to the vehicle's direction of travel. A C-shaped bent pipe 64 is fixedly inserted into the mounting through hole 63. The lower end of the bent pipe 64 is inserted into the center of the tire under test 9, which plays a major positioning and support role in the installation of the tire under test 9. The lower surface of the first base plate 21 is fixedly mounted with a hydraulic cylinder 65 via four connecting rods. Below the hydraulic cylinder 65, a hydraulic push rod 61 is mounted via a hydraulic pump 66. The output end of the hydraulic push rod 61 is installed at the lower end of the bend 64 near the tire 9 under test. Controlled by the hydraulic pump 66, the hydraulic push rod 61 pushes the tire 9 downwards, causing it to contact the ground. The contact force of the tire 9 is monitored in real time by a measuring device 5 on the tire. During the test, the hydraulic system 6 can also dynamically adjust the oil pressure according to preset load parameters. For example, when simulating different vehicle loads, the pressure inside the hydraulic cylinder 65 is changed by controlling the valve group to keep the tire-ground contact force stable. When test conditions need to be adjusted, the hydraulic system 6 can quickly respond and reset the tire pressure, for example, reducing the contact force to avoid slippage in wet road surface tests.

[0039] The measuring device 5 is a sensor system for collecting dynamic forces on the tire. In this embodiment, it can be a six-component force sensor installed on the tire under test 9. The six-component force sensor is fixed to the center of the wheel hub of the tire under test 9 through a threaded connection or flange, and is used to monitor the force and torque of the tire in three axes in real time. In addition, strain gauge or piezoelectric sensors can also be used to collect multi-dimensional mechanical data in real time by directly contacting the tire surface. When the tire under test 9 contacts the ground and rolls, various sensors convert the longitudinal force, lateral force, vertical force, and corresponding rollover torque, yaw torque, and rolling torque borne by the tire under test 9 into various electrical signals through internal sensitive elements. These signals are transmitted to the processing system through the data acquisition module to generate mechanical data of the tire under test 9 in various scenarios in real time. Since the sensors are directly integrated into the tire under test 9, signal attenuation or interference caused by mechanical transmission in traditional indirect measurement is avoided, thereby ensuring the integrity and accuracy of the test data.

[0040] When the test bench 2 is working, the loading vehicle 1 is driving normally on the road, and the tire 9 under test is also rolling on the ground. The force on the tire 9 under test can be detected by measuring devices such as the six-component force sensor 5. When a lateral deviation measurement is required, the first base plate 21 is adjusted to deflect at a certain angle in the horizontal plane by the first servo motor 33. When a tilt measurement is required, the third base plate 23 is controlled to flip at a certain angle by the second servo motor 45. During lateral deviation and tilt, the test bench 2 drives the tire 9 under test to lateral deviation and tilt at the corresponding angle through the bend pipe 64. As the loading vehicle 1 continues to move, the performance data of the tire under lateral deviation and tilt can be obtained.

[0041] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any changes or modifications made in accordance with the claims and description of the present utility model should fall within the scope of the patent of the present utility model.

Claims

1. A vehicle-mounted tire testing bench, characterized in that: The device includes a loading vehicle and a test bench mounted on the loading vehicle. A tire to be tested is mounted on the test bench and rests against the ground. A measuring device for measuring the force on the tire to be tested is mounted on the tire to be tested. The test bench is equipped with a lateral deflection mechanism and a tilting mechanism that cause the tire to be tested to tilt.

2. The vehicle-mounted tire testing bench according to claim 1, characterized in that: The loading vehicle is a linearly moving vehicle, and the tire to be tested is installed at the center of the bottom of the loading vehicle.

3. The vehicle-mounted tire testing bench according to claim 1, characterized in that: The test bench is equipped with the tire to be tested via a hydraulic system, which presses the tire against the ground.

4. The vehicle-mounted tire testing bench according to claim 1, characterized in that: The measuring device is a six-component force sensor installed on the tire to be tested.

5. The vehicle-mounted tire testing bench according to claim 1, characterized in that: The test bench includes a second base plate and a first base plate that are parallel to each other. The first base plate is rotatably mounted on the loading vehicle, and the second base plate is detachably mounted on the first base plate. The lateral tilting mechanism is mounted on the first base plate, and the lateral tilting mechanism is mounted on the second base plate.

6. The vehicle-mounted tire testing bench according to claim 5, characterized in that: The first base plate is rotatably mounted on the loading vehicle via a first bearing about a vertical axis. The lateral deflection mechanism includes a lateral deflection gear mounted on the bottom surface of the first base plate and an arc-shaped rack fixedly mounted on the loading vehicle. The arc-shaped rack meshes with the lateral deflection gear. The mechanism also includes a first servo motor that controls the rotation of the lateral deflection gear.

7. The vehicle-mounted tire testing bench according to claim 5, characterized in that: The tilting mechanism includes a third base plate that can be flipped and mounted on the second base plate. The axis around which the third base plate flips is parallel to the direction of vehicle travel. The tire to be tested is mounted on the third base plate. The plane in which the tire rolls is parallel to the direction of vehicle travel. The mechanism also includes a second servo motor that controls the flipping of the third base plate.

8. The vehicle-mounted tire testing bench according to claim 7, characterized in that: The third base plate is fixedly provided with a flipping platform at both ends, and the second base plate is fixedly provided with a motor bracket at both ends on the upper surface of the second base plate. The second servo motor is installed in the motor bracket, and the output shaft of the second servo motor is fixedly installed on the flipping platform. The flipping platform is rotatably installed on the flipping table bracket through the second bearing, and the flipping table bracket is fixedly installed on the upper surface of the second base plate.

9. The vehicle-mounted tire testing bench according to claim 8, characterized in that: The flipping platform includes two long strip-shaped clamping plates and a connecting block connecting the two clamping plates. The upper surface of the second base plate is also provided with a clamping device that can lock the positions of the two ends of the clamping plates.

10. The vehicle-mounted tire testing bench according to claim 7, characterized in that: The test bench mounts the tire under test via a hydraulic system. A mounting base is fixedly mounted on the upper surface of the third base plate. The mounting base has a horizontal mounting through hole with its axis perpendicular to the vehicle's direction of travel. A C-shaped bend is fixedly inserted into the mounting through hole. The lower end of the bend is inserted into the center of the tire under test. A hydraulic cylinder is fixedly mounted on the lower surface of the first base plate. A hydraulic push rod is mounted below the hydraulic cylinder. The output end of the hydraulic push rod is mounted at the lower end of the bend near the tire under test.

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