Patent ID: 9279447
Filing Date: 2016-03-08
CPC Classification: B62D,F16C,F16H

Claim Text:
1. A bush bearing for rotatably supporting a rotating shaft portion of an end portion of a driving gear which meshes via a meshing portion with a driven gear of a transmission for transmitting the power of an electric motor for steering assistance to a steering mechanism in an electric power steering, comprising: a bearing body having an inner peripheral surface which is brought into contact with a cylindrical outer peripheral surface of said rotating shaft portion so as to be rotatable; a groove provided on an outer peripheral surface of said bearing body so as to extend in a direction about an axis of said rotating shaft portion; and an elastic ring fitted on said groove and having a pair of projecting portions partially projecting radially outward from the outer peripheral surface of said bearing body at least in a direction which is perpendicular to the axis of said rotating shaft portion and is toward and away from the meshing portion, wherein one of said projecting portions partially projecting radially outward from the outer peripheral surface of said bearing body on a meshing portion side in the direction toward and away from the meshing portion has a smaller amount of projection than an amount of radially outward projection of another one of said projecting portions partially projecting radially outward from the outer peripheral surface of said bearing body on an opposite side to the meshing portion side in the direction toward and away from the meshing portion, and