Automobile power-assisted steering motor rotor bearing lining

Abstract

The invention discloses an automobile power-assisted steering motor rotor bearing lining. An elastic lining is arranged between a rotor bearing and the inner wall of the bearing seat of a stator housing. The lining is in an annular shape and is a thin-wall ethylene propylene rubber member the top of which is provided with flanges. In virtue of the elastic lining of the lining, the axis of the rotor and the axis of the inner chamber of a stator magnetic shoe are subjected to flexible rectification in order to be coaxial. A technical scheme of adjusting the axial pretightening force of the rotor bearing on the bearing seat by using the flanges achieves purposes of prolonging the service life of the rotor bearing, eliminating the axial floating of the rotor bearing, increasing installation efficiency, and reducing cost.

Description

technical field [0001] The invention relates to a device in a power steering motor of an automobile, in particular to a bushing for a rotor bearing of a power steering motor of an automobile used as a pad between the rotor bearing of the power steering motor of an automobile and a bearing seat of a stator casing. Background technique [0002] The rotor shaft of the automobile power steering motor and the bearing seat of the stator casing are provided with a ball bearing that carries the rotation of the rotor; hereinafter, the automobile power steering motor is referred to as the motor, the ball bearing carrying the rotor rotation is referred to as the rotor bearing, and the stator casing bearing is referred to as The seat is referred to as the bearing seat for short; in order to ensure the dynamic radial positioning accuracy and axial position accuracy of the rotor in the stator casing, the prior art adopts riveting and fixing the front bearing of the rotor and the end cover,...

AI Technical Summary

Problems solved by technology

[0003] Due to the accumulated errors in the manufacture and assembly of the various parts of the motor, the axis of the rotor during actual assembly is not coaxial with the axis of the inner bore of the stator magnetic tile, because the "O" rubber ring is a "line" rather than a "surface" Support, resulting in rigid contact between the outer edge of the rotor bearing and the bearing seat, which will cause vibration and noise between the bearing and the bearing seat: due to the machining error of each part and the rigid contact between the bearing and the bearing seat, it will also cause the inner and outer parts of the bearing If the axial preload of the gasket is too loose or too tight, it will also cause the motor to run poorly, that is, if the axial preload is too loose, it will cause the rotor bearing to lose Axial movement is bad; if the axial preload is too tight, the axial load of the rotor bearing will be overweight and heat up when the motor is working, which will shorten the service life; in addition, the installation of the wave gasket is cumbersome, requiring special tooling, and the efficiency is low. High labor cost, therefore, the existing technology has the problems and deficiencies of unavoidable vibration and noise, short service life, easy axial movement, low installation efficiency and high cost

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