Patent ID: 9279450
Filing Date: 2016-03-08
CPC Classification: B62D,F16C,F16H

Claim Text:
1. A bush bearing comprising: a bush on which a groove is formed along a circumferential direction on an outer circumferential surface of the bush; and an endless annular-shaped elastic member which is installed in the groove of the bush, wherein an inner circumferential surface of the bush includes a first inner circumferential surface and a second inner circumferential surface, the first inner circumferential surface is formed over an angular range greater than 180° about an axial center of the bush, the second inner circumferential surface has a diameter larger than that of the first inner circumferential surface, the groove has a first part formed in a formation range of the first inner circumferential surface and a second part formed in a formation range of the second inner circumferential surface, the first part of the groove has a depth shallower than that of the second part of the groove, a first portion of the endless annular-shaped elastic member, is placed on the first part of the groove and has a radial deformation margin larger than that of a second portion of the endless annular-shaped elastic member, which is placed on the second part of the groove, and the endless annular-shaped elastic member is in direct contact with an inner circumferential surface of a gear housing and extends along an entire outer circumferential surface of the bush.