Electric power steering system
AssigneeJtekt Corporation
InventorsSusumu Yuasa, Yoshiaki Takagi, Etsuro Kitami
Life of this patent
Estimating the term…
Abstract
A curved leaf spring which is a first urging member surrounds an outer wheel of a second bearing, and urges, through the second bearing, a second end of a worm shaft in a direction in which the distance between the center of the worm shaft and the center of a worm wheel is shortened. A second urging member includes an annular support member received by an end surface of the outer wheel and a plurality of elastic pins extending in a direction in parallel with the axial direction of a support member. The elastic pins have fixed ends fixed to the support member and free ends that come into elastic contact with an end wall of a housing.
Claims7
An electric power steering system which transmits power of an electric motor for assisting a steering to a steering mechanism via a transmission device that includes a drive gear and a driven gear in mesh with the drive gear, the electric power steering system comprising:
- a bearing that rotatably supports an end of the drive gear in an axial direction thereof;
- a housing that includes a support hole for supporting the bearing in such a manner to be deviated in a direction in which a distance between an axial center of drive gear and an axial center of the driven gear varies;
- a first urging member that elastically urges the drive gear via the bearing in a direction in which the distance between the axial centers of the drive gear and the driven gear is shortened;
- and
- a second urging member that includes a plurality of elastic pins arranged in a circumferential direction of the bearing for elastically urging the bearing in the axial direction.
Dependencies are inferred from the claim text.