Hub unit negative clearance detection device

Abstract

The invention discloses a hub unit negative clearance detection device which comprises a positive clearance detection device and an inner ring repressing device, wherein the positive clearance detection device comprises a positive clearance main frame, a clearance measuring and clamping mechanism, a positive clearance main shaft measuring mechanism, a measuring lifting mechanism and a workpiece climbing mechanism; the inner ring repressing device comprises an inner ring main frame, an upper measuring mechanism and a lower climbing mechanism. According to the hub unit negative clearance detection device, the falling displacement of an inner ring is measured by adopting a displacement sensor, the negative clearance value of a hub unit is obtained, the inner ring is not pressed in place at the station of the positive clearance detection device, the positive clearance value is measured through vertically moving a flange plate and the inner ring, certain pressure is controlled at the station of the inner ring repressing device, after the inner ring is pressed in place, the displacement change value of inner ring is detected, and the negative clearance value of the hub unit is obtained according to the positive clearance value. The device is high in automation degree and measurement accuracy, the detection of the hub unit negative clearance value is achieved, the quality of the hub unit is guaranteed, and safety of motor vehicles is improved.

Description

technical field [0001] The invention relates to a device for detecting the negative clearance value of a wheel hub unit after the assembly of the wheel hub unit is completed, and belongs to the technical field of wheel hub unit detection. Background technique [0002] The detection of the assembly quality of the hub unit is an important part of the safety performance detection of motor vehicles. The negative clearance value directly affects the service life of the hub unit. When the negative clearance value is not enough, the hub bearing is easy to loose and form vibration under the loaded state; when the negative clearance value is too large, the contact stress of the raceway is too large And produce early fatigue; at the same time, a reasonable clearance value also determines the quality of the hub unit assembly. [0003] At present, the detection of negative clearance is to indirectly reflect the value of negative clearance by detecting the unloading force. An axial pre...

AI Technical Summary

Problems solved by technology

The repeatability is not good, and the repeated test of the same piece has a large deviation, which cannot truly reflect the clearance value, especially the product that directly moves the steel ball

And the fork of the steel ball shifting product may scratch the steel ball, which affects the assembly quality of the hub unit and brings great hidden dangers to the safety performance of the vehicle

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