A vehicle wheel edge resistance torque testing device and a method of using the same

Abstract

The application relates to a whole vehicle wheel side resistance torque testing device and a use method thereof, the whole vehicle wheel side resistance torque testing device comprises driving members, a torque sensor and a connecting member connected in sequence, the driving members and the torque sensor are connected with a same control panel, the connecting member is used for connecting the torque sensor and a testing member, and the central axes of the driving members, the torque sensor and the testing member coincide with the wheel central axis of the testing member. The motor driving and the torque sensor are used to ensure stable rotation control and accurate torque measurement; the torque sensor and the testing member are connected through a cross axle universal joint coupling, measurement deviation caused by different shafts of the testing member and the testing equipment is reduced, the wheel side resistance torque under the whole vehicle state is accurately transmitted to the torque sensor, and the testing result is ensured to be accurate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile testing, and particularly relates to a whole vehicle wheel edge resistance torque testing device and a use method thereof. BACKGROUND

[0002] The automobile wheel edge resistance torque includes a hub bearing resistance torque and a brake caliper drag torque, and has an important influence on automobile fuel economy and electric vehicle endurance. At present, the testing of the whole vehicle wheel edge resistance torque mainly adopts a simple tool similar to a torque wrench to manually rotate the wheel end. Since the manual rotation is unstable in the control of rotation force, rotation speed and rotation position degree, the measurement deviation is caused, and in addition, the bearing and caliper drag torque is small, so that the manual rotation testing result has large deviation.

[0003] Therefore, it is necessary to provide a new whole vehicle wheel edge resistance torque testing device and a use method thereof to solve the above technical problems. SUMMARY

[0004] The present application aims to provide a whole vehicle wheel edge resistance torque testing device and a use method thereof to solve the above problems.

[0005] The present application achieves the above-mentioned purpose through the following technical solutions:

[0006] A whole vehicle wheel edge resistance torque testing device, comprising driving members, a torque sensor and a connecting member connected in sequence, wherein the driving members and the torque sensor are connected with a same control panel, the connecting member is used for connecting the torque sensor and a testing member, and the central axes of the driving members and the torque sensor coincide with the wheel central axis of the testing member.

[0007] As a further optimization scheme of the present application, the driving member is a driving motor, and the bottom side of the driving motor is provided with a motor support used for adjusting the height of the driving motor.

[0008] As a further optimization scheme of the present application, the driving motor and the torque sensor are connected through a shaft coupling.

[0009] As a further optimization scheme of the present application, the connecting member comprises a cross shaft universal joint coupling and a flange plate, and the flange plate and the cross shaft universal joint coupling are connected through a key.

[0010] As a further optimization scheme of the present application, the cross shaft universal joint coupling and the torque sensor are connected through a key.

[0011] As a further optimization scheme of the present application, the flange plate and the testing member are connected through a bolt.

[0012] As a further optimization scheme of the application, the control panel can display the torque and the rotating speed.

[0013] A method for using a whole vehicle wheel edge resistance torque testing device, comprising the following steps:

[0014] Mounting the testing piece on the connecting piece;

[0015] Setting the rotating speed and rotating time in the control panel to realize the motor rotating speed control and rotating circle number control;

[0016] According to the whole vehicle braking drag torque testing mode, stepping on the brake pedal with medium braking intensity for X times;

[0017] After the braking operation is completed, waiting for a preset time, and then starting the torque testing;

[0018] After the testing is completed, reading the resistance torque T0 of the Xth circle of the wheel rotation in the control panel;

[0019] Repeating the torque testing Y times, and calculating the average value T1 of the wheel edge resistance torque;

[0020] Dismounting the testing piece, and measuring the system torque T2 of the testing device with the same rotating speed;

[0021] Calculating the wheel edge resistance torque T=T1-T2.

[0022] The application has the following beneficial effects:

[0023] The application ensures the rotating control stability and the torque measurement accuracy through the motor driving and the torque sensor; the torque sensor and the testing piece are connected through the cross shaft universal joint coupling, the measurement deviation caused by the different shafts of the testing piece and the testing device is reduced, the wheel edge resistance torque under the whole vehicle state is accurately transmitted to the torque sensor, and the testing result accuracy is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the whole structure schematic diagram of the application.

[0025] In the figure: 1, motor support; 2, driving piece; 3, control panel; 4, torque sensor; 5, cross shaft universal joint coupling; 6, flange plate; 7, testing piece. DETAILED DESCRIPTION

[0026] It is necessary to point out here that the following detailed description is only used for further illustrating the application, and cannot be understood as the limitation on the protection scope of the application, and the skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0027] For example, Figure 1As shown, a kind of whole vehicle wheel edge resistance moment testing device, including motor support 1, driving part (driving motor) 2, torque sensor 4, control panel 3, cross shaft universal joint coupling 5, flange plate 6 etc.Control panel 3 installs motor driving program, sets up torque and rotating speed display interface.By driving part 2 driving wheel edge rotation, rotating speed can be set on control panel.By torque sensor 4 measurement rotating moment, reads torque test value on control panel 3 interface.Torque sensor 4 and wheel edge test piece 7 are connected by cross shaft universal joint coupling 5 and flange plate 6.Because of the whole vehicle test environment, the coaxial degree of test equipment and whole vehicle wheel edge piece is difficult to guarantee, therefore adopts cross shaft universal joint coupling 5, can correct the measurement deviation of test piece 7 and test equipment due to different shafts, so that the wheel edge resistance moment under the whole vehicle state is accurately transmitted to torque sensor.In order to assemble conveniently, cross shaft universal joint coupling 5 adopts quick-release type keyway connection structure, and is connected and fixed with torque sensor 4 and flange plate 6.Flange plate 6 and wheel edge test piece 7 are bolted and fixed.

[0028] Driving part 2 and torque sensor 4 are connected by coupling;

[0029] Cross shaft universal joint coupling 5 and torque sensor 4 are connected by key;

[0030] Flange plate 6 and test piece 7 are connected by bolt;

[0031] Flange plate 6 and cross shaft universal joint coupling 5 are connected by key;

[0032] Driving part 2 and torque sensor 4 are connected by wire harness with control panel 3.

[0033] The use method of the whole vehicle wheel edge resistance moment testing device is as follows:

[0034] Adjust the height of driving part 2.According to the position of whole vehicle wheel, the height of driving part 2 is adjusted by motor support 1, to ensure that the central axis of wheel and the axis of driving part 2 are basically at the same height;

[0035] The rotating speed and rotating time are set in control panel 3, to realize motor rotating speed control and rotating circle number (time) control;

[0036] According to the whole vehicle braking drag torque testing mode, medium braking intensity is adopted to step on brake pedal, and braking is performed X times;

[0037] After braking operation is completed, wait for 2 minutes, and then torque test is started;

[0038] After test is completed, the resistance moment T0 of the Xth circle of wheel rotation is read in control panel;

[0039] Repeat torque test step, measure 3 times, and calculate the average value T1 of wheel edge resistance moment;

[0040] The test piece 7 and the cross axle universal joint coupling 5 are disconnected, and the system torque T2 of the test device is measured at the same rotating speed;

[0041] The wheel side resistance torque (hub bearing and brake caliper) T is calculated as T=T1-T2.

[0042] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A device for testing the wheel side resistance torque of a complete vehicle, characterized in that The device comprises a driving member (2), a torque sensor (4) and a connecting member connected in sequence, the driving member and the torque sensor (4) are connected with a same control panel (3), the connecting member is used for connecting the torque sensor (4) and a test member (7), the central axis of the driving member and the torque sensor (4) coincides with the wheel central axis of the test member (7); The driving member (2) is a driving motor, the bottom side of the driving motor is provided with a motor support (1) used for adjusting the height of the driving motor; the driving motor is connected with the torque sensor (4) through a shaft coupling; the connecting member comprises a cross shaft universal joint coupling (5) and a flange plate (6), the flange plate (6) and the cross shaft universal joint coupling (5) are connected through keys; the cross shaft universal joint coupling (5) is connected with the torque sensor (4) through keys; the flange plate (6) is connected with the test member (7) through bolts; the control panel (3) can display torque and rotating speed; The use steps of the whole vehicle wheel edge resistance torque testing device are as follows: The test member (7) is installed on the connecting member; The rotating speed and rotating time are set in the control panel (3) to realize motor rotating speed control and rotating circle number control; According to the whole vehicle braking drag torque testing mode, the medium braking intensity is adopted to step on the brake pedal X times; After the braking operation is completed, the torque testing is started after waiting for a preset time; After the testing is completed, the wheel rotating Xth circle resistance torque T0 is read in the control panel; The torque testing is repeated Y times, and the average value T1 of the wheel edge resistance torque is calculated; The test member (7) is disassembled, the system torque T2 of the testing device is measured at the same rotating speed; The wheel edge resistance torque T is calculated as T=T1-T2.

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