Reducer of electric power steering device
AssigneeMando Corporation
InventorKyung Tack Lee
Life of this patent
Estimating the term…
Abstract
The present embodiments relates to a reducer of an electric power steering device. An embodiment of the present embodiments provides a reducer of an electric power steering device, including: a worm shaft having a first worm shaft bearing and a second worm shaft bearing coupled to one end portion, which is connected to a motor shaft, and to the other end portion, which is opposite thereto, respectively; a gear housing that contains the first worm shaft bearing, the second worm shaft bearing, and the worm shaft; and a support member coupled to the inner peripheral surface of the hear housing so as to support the outer race of the second worm shaft toward the worm wheel and filled with a viscoelastic fluid.
Claims11
A reducer of an electric power steering device, comprising:
- a worm shaft having a first worm shaft bearing coupled to one end portion of the worm shaft and a second worm shaft bearing coupled to an other end portion of the worm shaft;
- a gear housing that contains the first worm shaft bearing, the second worm shaft bearing, and the worm shaft;
- and
- a support member coupled to the gear housing so as to support the second worm shaft bearing toward a worm wheel and filled with a viscoelastic fluid,
- wherein the support member comprises:
- a cylinder member having a barrier provided on an inner peripheral surface so as to form a filled portion that is filled with the viscoelastic fluid;
- and
- a piston member, wherein one end portion of the piston member contacts the second worm shaft bearing and an other end portion of the piston member is disposed in the filled portion filled with the viscoelastic fluid,
- wherein an elastic body is disposed between the one end portion of the piston member contacting the second worm shaft bearing and the other end portion of the piston member disposed in the filled portion filled with the viscoelastic fluid, and
- wherein a support plate formed at the one end portion of the piston member contacting the second worm shaft bearing supports the elastic body, and an outer peripheral surface of the support plate formed at the one end portion of the piston member contacting the second worm shaft bearing is spaced apart from the inner surface of the cylinder member.
Dependencies are inferred from the claim text.