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US 8,540,258 B2Granted
Rack assist type electric power steering apparatus
AssigneeMando Corporation
InventorsHong Yong Bae, Joo Namgung, Hee Kwon Jo
Life of this patent
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Abstract
A rack-assist type electric power steering apparatus, in which when a ball nut slides a rack bar while rotating, a vibration and a noise in the axis direction and the radial direction, generated from the rack bar and a rack housing, are absorbed. This facilitates the operation of the ball nut and the rack bar, and reduces the vibration and the noise, thereby resulting in an effect for providing a comfortable steering feeling to a driver.
Claims6
A rack-assist type electric power steering apparatus comprising:
- a ball nut which is rotated while being combined with a rack bar through a ball, thereby sliding the rack bar;
- a bearing which is mounted on an outer circumferential surface of the ball nut to support rotation;
- a connecting ring combined between an outer wheel of the bearing and a rack housing;
- and
- an axial damper which is combined at both sides of the connecting ring and is provided with lateral side projections protruding in a direction of a central axis of the rack bar,
- wherein the lateral side projections comprise a number of first side projections, and a number of second side projections, and
- wherein the connecting ring has a radial projection, and the axial damper is combined at both sides of the projection.
4 more elements
A rack-assist type electric power steering apparatus comprising:
- a ball nut which is rotated while being combined with a rack bar through a ball, thereby sliding the rack bar;
- a bearing which is mounted on an outer circumferential surface of the ball nut to support rotation;
- a connecting ring combined between an outer wheel of the bearing and a rack housing;
- and
- an axial damper which is combined at both sides of the connecting ring and is provided with lateral side projections protruding in a direction of a central axis of the rack bar,
- wherein the lateral side projections comprise a number of first side projections, and a number of second side projections,
- wherein between an outer circumferential surface of a projection of the connecting ring, and the rack housing, a radial damper is combined, and
- wherein an inner circumferential surface of the radial damper is provided with a number of inner side projections which are spaced apart from each other.
5 more elements
Dependencies are inferred from the claim text.