The Method of Reducing the Bearing Clearance Error of the Wheel End Assembly

Abstract

A provided method for reducing clearance error of bearings of a wheel end assembly comprises the following steps: (1) integrally casting a wheel hub and support spacers for supporting two rows of bearings in the wheel hub; (2) after once positioning and clamping, precisely processing the wheel hub and the support spacers according to the distance of the two rows of the bearing; and (3) separating the wheel hub and the support spacers from the connection parts. By integrally casting the wheel hub and the support spacers and employing once positioning and clamping the processed wheel hub and the support spacers, the positioning error is reduced, the consistence of the dimension tolerance and the geometric tolerance between the wheel hub and the support spacers is guaranteed, the clearance between the support spacers and the bearings is effectively reduced, and the accumulated error is substantially reduced, so that the service life of the bearings and the normal working state of the wheel end assembly are guaranteed. Also, the integrally-cast support spacer structures accord with stress in environments such as vehicle turning, severe impacting and the like, is improved in service life, and also helps to improve the strength and the bearing capacity of the wheel hub.

Description

technical field [0001] The invention belongs to the technical field of wheel end assemblies, in particular to a method for reducing the clearance error of a bearing used in the wheel end assembly. Background technique [0002] At this stage, with the rapid development of China's expressway network and automobile logistics industry, the number of commercial vehicles / passenger vehicles is increasing. At present, commercial vehicles / passenger wheels mostly use two rows of tapered roller bearings for rotation. The use of tapered roller bearings causes the axial clearance of the wheel. If the clearance is too large, the number of rollers involved in rolling contacting the inner and outer rings is too large. If the clearance is too small, it will lead to excessive stress and deformation, and reduce the fatigue life of the bearing; if the clearance is too small, the bearing will roll and heat up after bearing heavy loads, which will cause the inner and outer rings to glue and lock ...

AI Technical Summary

Problems solved by technology

In order to ensure the adjustment of the clearance, the tolerance of the bearing block usually needs to be controlled to about ±0.05mm, and the tolerance of the support spacer also needs to be controlled to ±0.05. The product processing is very difficult, and there may still be more than 10 wires. system cumulative error

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