Patent ID: 8919490
Filing Date: 2014-12-30
Classification: B62D,F16C,F16H

Abstract:
1. A power-assisted steering system for a vehicle, comprising: a lead screw having an axial direction, a rolling bearing, a bearing disk, and an elastomeric ring; and wherein the lead screw is driven by a servo motor and comprises: wherein the nut is mounted in the frame by the rolling bearing; wherein the rolling bearing includes an outer ring positioned in a radial direction relative to the lead screw, the outer ring having a radial thickness which defines a radial region; wherein the bearing disk is axially disposed to at least one side of the rolling bearing; wherein the elastomeric ring comprises an elastomeric material and is axially disposed at a side of the bearing disk that faces away from the outer ring; wherein the elastomeric ring has a first side surface in direct contact with the bearing disk over an entire span oldie radial region defined by the thickness of the outer ring, and having a second side surface having a nose-shaped configuration extending axially away from the bearing disk and first side surface; and wherein the elastomeric ring is a first elastomeric ring and the bearing disk is a first bearing disk, and further comprising a second elastomeric ring axially positioned on another side of the rolling bearing axial to a second bearing disk, the second bearing disk being axially disposed to a side opposite to said one side of the rolling bearing, the first elastomeric ring being vulcanized on the first bearing disk and the second elastomeric ring being vulcanized on the second bearing disk.