Patent ID: 9568044
Date: 2017-02-14
CPC Classifications: B62D,F01D,F16C,F16H

Claim:
1. A motor driven power steering system comprising: a worm gear integrated with a shaft extending along an axis; and a bearing bush comprising a bearing guide and a damper; the bearing guide comprising a first ring-shaped wall extending along and around the axis with a first opening and a second opening at two opposing ends thereof in the axis, the first ring-shaped wall configured to receive a distal end portion of the shaft through the first opening, the first ring-shaped wall having a first through hole; the damper comprising a second ring-shaped wall formed on and surrounding an outer circumferential surface of the first ring-shaped wall such that the second ring-shaped wall is to absorb vibration of the shaft, the second ring-shaped wall having s a second through hole; the damper comprising a plurality of grooves formed into an outer circumferential surface of the second ring-shaped wall, each groove extending along the axis but not extending the entire length of the second ring-shaped wall in the axis, each groove having a triangular shape in a cross-section taken by a plane perpendicular to the axis.