Power steering device

摘要

A power steering device for assisting a steering force applied to a steering wheel by a driver includes a worm shaft that rotates in association with driving of an electric motor, a worm wheel that meshes with the worm shaft and transmits a rotational force of the electric motor to a rack shaft steering a wheel, a bearing that supports a tip end side of the worm shaft, a gear case that houses the worm shaft, a lid that closes an opening formed in a tip end portion of the gear case, a first elastic portion arranged in a compressed manner between the gear case and the lid, and a second elastic portion arranged between an inner circumferential surface of the gear case and an outer circumferential surface of the bearing. The first and the second elastic portion are formed in an integrated manner via a small thickness portion.

主权项

1. A power steering device for assisting a steering force applied to a steering wheel by a driver, the power steering device comprising:
a worm shaft that rotates in association with driving of an electric motor; a worm wheel that meshes with the worm shaft, the worm wheel being configured to transmit a rotational force of the electric motor to a rack shaft steering a wheel; a bearing that rotatably supports a tip end side of the worm shaft; a gear case that houses the worm shaft; a lid that closes an opening formed in a tip end portion of the gear case; a first elastic portion arranged in a compressed manner between the gear case and the lid; and a second elastic portion arranged between an inner circumferential surface of the gear case and an outer circumferential surface of the bearing, wherein the first elastic portion and the second elastic portion are formed in an integrated manner via a small thickness portion therebetween.