CN-224216306-U - Loading device of automobile tire road surface test trailer

Abstract

The utility model relates to a loading device of a vehicle tire road surface test trailer. The device comprises an axle, a leveling assembly, a vertical loading assembly and a test tire, wherein a rotating wheel below the axle is abutted on a road surface, the rear part of the leveling assembly is rotatably connected to a frame above the axle, the vertical loading assembly is arranged at the front part of the leveling assembly and keeps a vertical state with the road surface, and the test tire is detachably connected below the vertical loading assembly and abutted on the road surface. According to the utility model, the high-precision vertical loading is carried out on the tire for testing the relative gripping performance of the wet road surface of the automobile tire, so that the longitudinal force error caused by the fact that the loading cannot be precisely vertical to the road surface is eliminated, and the accuracy of the test of the relative gripping performance of the wet road surface of the tire is improved.

Inventors

• CHEN XUN
• ZENG SHAOLI
• LIN HENGHONG
• XU JUNFA
• YANG JIARU

Assignees

• 汕头市浩大轮胎测试装备有限公司

Dates

Publication Date

20260508

Application Date

20250327

Claims (8)

1. 1. The loading device of the automobile tire road surface test trailer is characterized by comprising an axle, a leveling assembly, a vertical loading assembly and a test tire, wherein a rotating wheel below the axle is abutted against a road surface, the rear part of the leveling assembly is rotatably connected to a frame above the axle, the vertical loading assembly is arranged at the front part of the leveling assembly and keeps a vertical state with the road surface, and the test tire is detachably connected below the vertical loading assembly and abutted against the road surface.
2. 2. The loading device of the automobile tire pavement test trailer according to claim 1, wherein the leveling assembly comprises a cross beam, a first sliding rail, a loading seat and a weight, the cross beam is rotatably connected to the frame, the first sliding rail is paved on the cross beam, the lower part of the loading seat is slidably connected to the first sliding rail, and the weight is detachably mounted on the loading seat.
3. 3. The loading unit of an automobile tire road test trailer as recited in claim 2 wherein said leveling assembly further comprises an angle sensor, said angle sensor being disposed on the cross beam.
4. 4. The loading device of the vehicle tire road test trailer of claim 3, wherein the leveling assembly further comprises a drive member disposed on the cross beam, the loading dock being driven by the drive member to slide on the first rail.
5. 5. The loading device of the automobile tire road surface test trailer according to claim 4, wherein the vertical loading assembly is vertically arranged on one side of the cross beam, the vertical loading assembly comprises a servo motor, a test wheel position and a multi-component sensor, the servo motor is arranged on the cross beam and is connected with the test wheel position through the multi-component sensor, the test wheel position is driven by the servo motor to adjust the vertical height position, and the test tire is detachably connected to the test wheel position.
6. 6. The loading device of the automobile tire pavement test trailer according to claim 5, wherein the vertical loading assembly further comprises a supporting plate, a second sliding rail and a supporting seat, the supporting plate is connected below the cross beam, the second sliding rail is arranged on the supporting plate, the supporting seat slides on the second sliding rail under the driving of the servo motor, and the supporting seat is connected with the test wheel position through the multi-component force sensor.
7. 7. The loading device of the automobile tire pavement test trailer according to claim 5, wherein the vertical loading assembly further comprises a fixed plate and a third sliding rail, the third sliding rail is arranged on the fixed plate, the fixed plate is slidably connected to a mounting seat on the cross beam through the third sliding rail, the output end of the servo motor is connected with the fixed plate, and the test wheel position is connected to the fixed plate through the multi-component force sensor.
8. 8. The loading unit of a tire road test trailer for an automobile as in claim 6 or 7, wherein the vertical loading assembly further comprises a brake disposed on the test wheel station.

Description

Loading device of automobile tire road surface test trailer Technical Field The utility model belongs to the technical field of relative gripping performance tests of tires, and particularly relates to a loading device of a vehicle tire pavement test trailer. Background Tires are the most important safety components of automobiles, and are the only ground-engaging components, and the tire gripping performance is important for the handling performance and safety performance, particularly braking performance, of tires and vehicles. The dry grip and wet grip performance of the tire are not consistent and require separate tests. On wet road surface, because the adhesion between the tire and the ground is obviously reduced, dangerous situations such as slipping, out-of-control and the like are easy to occur to the vehicle, and the potential safety hazard of traffic accidents is increased. Therefore, all whole vehicles and tire enterprises are very important in terms of the relative gripping performance test of the tire wet road surface for guiding the development and matching of the tire braking performance, meanwhile, the national regulation standard is also very important in terms of the relative gripping performance of the tire wet road surface, GB/T21910 'test method for the relative gripping performance of the car tire wet road surface' and GB/T35163 'test method for the relative gripping performance of the truck tire wet road surface' are issued successively, and the gripping performance of the tire wet road surface is definitely brought into the forced management requirements in the national forced standards GB 9743-2024 'car tire' and GB 9744-2024 'truck tire' issued in 2024. These requirements require not only perfect technical standards and test fields, but also precise test instruments and equipment. Wet testing sites are more difficult to achieve consistency than dry testing. The test results may be different in different sites, different positions in the same site and different times in the same position, so that standard tires with stable performance and good consistency must be introduced, and the wet road gripping performance of the tires to be tested is evaluated by the wet gripping performance ratio of the tires to be tested relative to the standard tires. The wet grip performance test method of the tire comprises a vehicle method and a trailer method. According to the vehicle method, a test vehicle provided with an ABS system and applicable to both the tire to be tested and the standard tire is selected, the tire to be tested and the standard tire are respectively tested, and the decelerating performance of the tire in the braking process is tested by using an instrument. The vehicle method has the defects that firstly, the standard tire specifications are limited, a plurality of tires to be tested and the standard tire are arranged on the same test vehicle for testing, even by means of transition of a reference tire (a third tire), some tire specifications are difficult to test by using the vehicle method, and secondly, the test efficiency is low and the cost is high. In addition, the vehicle method can only obtain the average deceleration, the braking force coefficient and the relative grip performance index of the wet road surface of the tire to be tested, and cannot take key data such as the peak braking force, the peak braking attachment coefficient, the braking slip attachment coefficient, the slip rate and the like of the tire concerned by the automobile industry. The trailer method obtains (instantaneous) braking force, (instantaneous) test load, (instantaneous) braking force coefficient, peak braking force, braking peak attachment coefficient, braking slip attachment coefficient, slip rate and the like by measuring the maximum braking force of the tire from the start of emergency braking to the locking of the wheels by a multi-component sensor (measurement component including but not limited to vertical direction and longitudinal direction) mounted on a tire shaft when passing through a test road surface at a constant speed by a specified speed, by mounting one test tire (including a tire to be tested and a standard tire, taking a car tire as an example, the vehicle method requires four tires to be mounted simultaneously) on a special test trailer towed by a tractor, mounting the tire to be tested on the trailer, or mounting the tire to be tested on a special tire test vehicle. The trailer method can simultaneously meet the requirements of the tire industry and the automobile industry. The vertical loading mechanism of the test trailer is an important ring of the relative grip performance test of the wet road surface of the tire. Early test trailers, which vertically loaded tires by means of weighting the vehicle (e.g., iron sand packs, weights, etc.), were heavy and inconvenient. In the prior art, a mechanical lever mode is used for vertically loading the tire, the counterweight is a