POSITION ADJUSTABLE STEERING APPARATUS

摘要

A sub-arm which is rotated together with an adjustment lever is fixed to a base end portion of the adjustment lever. A receiving side member is fixed to an outer surface of one support plate part of a support bracket and a buffer member made of an elastic material is fixed to the receiving side member. When the adjustment lever is rotated in a predetermined direction, a tip portion of the sub-arm first contacts the buffer member before step portions of driving and driven cam surfaces contact each other. Therefore, when the adjustment lever is rotated in the predetermined direction (a direction in which an axial dimension of a cam mechanism is contracted) so as to adjust a position of a steering wheel, it is possible to prevent generation of a harsh abnormal noise caused as the step portions of the driving and driven cam surfaces contact each other.

主权项

1. A position adjustable steering apparatus comprising:
a cylindrical steering column; a displacement bracket which is fixedly provided to a part of the steering column; a steering shaft which is rotatably supported inside the steering column and includes a rear end portion which protrudes from a rear end opening of the steering column so as to support and fix a steering wheel; a support bracket which is supported to a vehicle body side and includes a pair of support plate parts which interpose the displacement bracket therebetween from both sides in a width direction; an adjustment rod which is inserted into a vehicle body side through hole formed at the support plate parts and a column side through hole formed at the displacement bracket in the width direction; an anchor part which is provided at one end portion of the adjustment rod; an adjustment lever which is provided at the other end portion of the adjustment rod; and a cam mechanism which is provided between the adjustment lever and an outer surface of one support plate part of the pair of support plate parts and includes a metallic driving cam configured to rotate together with the adjustment lever and a metallic driven cam configured not to rotate irrespective of rotation of the adjustment lever, wherein the cam mechanism is configured by engaging cam surfaces which are provided on facing side surfaces of the driving cam and the driven cam and which have an uneven shape in a circumferential direction, and is configured to expand and contract an axial dimension of the cam mechanism based on rotation of the adjustment lever, thereby expanding and contracting an interval between the driven cam and the anchor part, wherein at least one of the vehicle body side through holes and the column side through hole is configured as an adjustment long hole which is long in a direction in which a position of the steering wheel is adjustable, wherein the position adjustable steering apparatus further comprises: a sub-arm which is fixed to the adjustment lever; a receiving side member which is fixed to the one support plate part; and a buffer member which is made of an elastic material and fixed to either one of the sub-arm and a part of the receiving side member, and wherein when the adjustment lever is rotated in a direction in which the axial dimension of the cam mechanism is contracted, the other of the sub-arm and the part of the receiving side member contacts the buffer member.