Bush bearing
AssigneeOiles Corporation
InventorNoboru Nakagawa
Life of this patent
Estimating the term…
Abstract
A bush bearing 7 includes a bearing body 8 having an inner peripheral surface 7 which is brought into contact with a cylindrical outer peripheral surface 6 of a rotating shaft portion 5 so as to be rotatable in an R direction, groove means 10 provided on an outer peripheral surface 9 of said bearing body 8 so as to extend in the R direction, and elastic ring means 16 fitted on said groove means 10 and having a pair of projecting portions 12 and 13 and portion 14, the pair of projecting portions 12 and 13 partially projecting radially outward from the outer peripheral surface 9 of said bearing body 8 in an A direction, the portion 14 being provided at positions in the R direction between the pair of projecting portions 12 and 13, and not projecting radially outward from the outer peripheral surface 9 of said bearing body 8.
Claims9
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 system, comprising:
- a bearing body having an inner peripheral surface which is brought into rotatable contact with a cylindrical outer peripheral surface of said rotating shaft portion;
- at least one first groove and at least one second groove provided on an outer peripheral surface of said bearing body so as to extend in a first direction about an axis of said rotating shaft portion;
- a first elastic ring member fitted in said at least one first groove and having a first projecting portion partially projecting radially outward from the outer peripheral surface of said bearing body on a meshing portion side in a second direction which is perpendicular to the axis of said rotating shaft portion and is toward the meshing portion and a first portion not projecting radially outward from the outer peripheral surface of said bearing body on an opposite side to the meshing portion side in the second direction;
- and a second elastic ring member fitted in said at least one second groove and having a second projecting portion partially projecting radially outward from the outer peripheral surface of said bearing body on the opposite side and a second portion not projecting radially outward from the outer peripheral surface of said bearing body on the meshing portion side.
Dependencies are inferred from the claim text.