Hub bearing negative windage detection method

Abstract

The present invention relates to a hub bearing negative windage detection method. A torque loading device applies a rated torque P of 5-15 N. m to the steel ball assembly of a hub bearing; a bearing axial pressure device applies axial load to the hub bearing to allow the hub bearing to tend to release the negative windage; the bearing axial pressure device comprise a mandrel bearing tool and an outer ring positioning tool, and the mandrel bearing tool and the outer ring positioning tool are oppositely arranged and are apart from / close to each other in the axial direction; there is provided a axially telescoping holding space between the outer ring positioning tool and the mandrel bearing tool, an axially extending abdicating through hole is arranged in the outer ring positioning tool, and the steel ball shift fork of the torque loading device is disposed in the abdicating through hole; and the bearing axial pressure device applies load bearing to the hub bearing in a gradually increasing load value mode, and axial load is applied to the torque loading device to stir the steel ball assembly of the hub bearing and drive the rotation of the steel ball assembly larger than 90 degrees, so that the negative windage is obtained. The operation is simple, and the stability and the reliability of the detection are good.

Description

technical field [0001] The invention relates to the technical field of bearing detection, in particular to a negative clearance detection method of a hub bearing. Background technique [0002] With the rapid development of the automobile manufacturing industry, the third-generation hub bearing unit gradually replaces the first and second generations and becomes the load-bearing and transmission parts of the automobile. Such as figure 1 As shown, the main structure of the third hub bearing unit includes a bearing inner ring 91 (also called a mandrel), a bearing outer ring 92, and the bearing inner ring 91 and bearing outer ring 92 can be collectively referred to as a bearing ring, and the bearing outer ring At least two rows of ball bearings are arranged between 92 and the inner ring 91 of the bearing, and the inner row of balls is held in the bearing by the retainer 93 . An important difference between the third-generation hub bearing unit and the first and second-generati...

AI Technical Summary

Problems solved by technology

When the negative clearance is not enough, the hub bearing is easy to loosen under load and form vibration, causing the vehicle to shake (affecting personal safety); when the negative clearance is excessive, the contact stress of the raceway will be too large and early fatigue will occur , causing abnormal noise of the vehicle; both states are unfavorable to the working life of the bearing

[0003] The negative clearance of the third-generation hub bearing cannot be directly measured like the first and second-generation hub bearings. In the existing research data, there is also a lack of direct access to the clearance of the third-generation hub bearing.

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