Testing stand of friction torque of automotive wheel hub bearing

Abstract

Disclosed in the invention is a testing stand of a friction torque of an automotive wheel hub bearing. According to the traditional friction torque testing machine, the loaded situation during the actual vehicle driving process can not be simulated and the machine also can not adapt to the third-generation hub bearing flanges without various specifications. The testing stand is composed of a testing stand frame, a driving mechanism, a main shaft, a radial loading mechanism, an axial loading mechanism and a measured bearing fixing device; and the driving mechanism drives the main shaft to rotate. The measured bearing fixing device includes a support, a bearing fixed flange, and a torque sensor; the bottom of the support is hinged with a revolving body of the radial loading mechanism; one side of the top is fixed with an axial pressure sensor of the axial loading mechanism; the torque sensor is fixed at the other side of the top of the support; and the bearing fixed flange is fixed with the torque sensor. The axial loading mechanism applies an axial force to the measured bearing fixing device; and the radial loading mechanism exerts the radial force and the bending moment to the measured bearing fixing device. The provided testing stand is suitable for various automotive hub bearings and the complex loaded situation of the wheel hub bearing can be simulated.

Description

technical field [0001] The invention belongs to the technical field of testing, and relates to a bearing detection device, in particular to an automobile hub bearing friction torque test bench. Background technique [0002] The automobile hub bearing unit is one of the key components of the automobile chassis. The magnitude of its frictional moment represents the severity of the friction and wear of the hub bearing during operation. At the same time, the heat generated by friction will affect the lubrication performance of the hub bearing. Therefore, the hub bearing of the automobile The friction torque has a huge impact on the overall working life of the bearing, which has attracted more and more attention from domestic and foreign bearing manufacturers and users. [0003] At present, the application of automobile hub bearings in my country is mainly the third generation. Compared with ordinary double-row angular contact ball bearings and double-row tapered roller bearings,...

AI Technical Summary

Problems solved by technology

The research on the friction torque of wheel hub bearings abroad is earlier. International bearing giants such as SKF and TIMKEN have developed friction torque test benches for hub bearings. Use the actual needs of the enterprise

In China, the application of friction torque testing machine for automobile hub bearings in the industry is still in its infancy, and many hub bearing manufacturers and OEMs have not yet realized the criticality of friction torque

However, the existing ordinary bearing friction torque testing machine cannot adapt to the hub bearing flanges with many specifications.

On the other hand, in addition to bearing the axial and radial loads during the running of the car, the hub bearing unit of the car is also affected by a bending moment due to the influence of the tire camber angle and the toe angle of the tire, especially when the car is turning. , the bending moment increases sharply, so that the inner ring and outer ring of the hub bearing are not on the same axis. The friction torque of the bearing under this working condition is completely different from the general state. In the case of loading, there is an urgent need for an automobile wheel bearing unit friction torque test bench that can be applied to various wheel bearings and can simulate the complex loading conditions of radial, axial and bending moments of wheel bearings.

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