Steering column apparatus

摘要

Construction is achieved capable of stably maintaining an inner column 43 on the inner diameter side of an outer column 42. The outer column 42, including a support section 46 is formed by using hydroforming to swell a hollow tube outward in the radial direction. A displacement bracket 34 is also integrally formed with the outer column 42 by tube swelling. Furthermore, raised sections 47a, 47b of the support section 46 are formed at three or more location in the circumferential direction on the inner circumferential surface of the outer column 42, and these raised sections 47a, 47b and the outer circumferential surface of the inner column 43 come in contact with each other at three or more locations in the circumferential direction.

主权项

1. A steering column apparatus for a telescopic steering apparatus, comprising:
a steering column provided with: a cylindrical shaped outer column having a portion of which the inner diameter of at least part in the axial direction can expand and contract and support sections that are formed in three locations or more in the circumferential direction of the inner circumferential surface, the outer column with the support sections obtained by swelling a hollow tube outward in the radial direction; and a cylindrical shaped inner column having an outer circumferential surface that comes in contact with the support sections in at least three locations in the circumferential direction, the inner column fitted inside the inner diameter side of the outer column and supported by the support sections so as to move in the axial direction; this steering column supporting a steering shaft, to which a steering wheel is mounted to the rear end section, on the inside thereof such that the steering shaft can rotate freely; a fastened bracket provided with: a portion fastened to the vehicle body; a pair of support plate sections supported by the portion fastened to the vehicle body, and holding the portion of the outer column, of which the inner diameter can expand and contract, on both sides in the width direction; and through holes on the vehicle side formed in positions in the pair of support plate section that are aligned with each other; a displacement bracket provided with: a pair of clamped sections, that are integrally formed with the outer column by swelling the hollow tube, and that are clamped by the pair of support plate sections; and though holes on the column side formed in the clamped sections that are long in the axial direction of the outer column; a mechanism provided with: a rod shaped member that is arranged in the width direction passing through the through holes on the vehicle side and the through holes on the column side, the mechanism expanding or contracting the space between the pair of support plate sections according to rotation of the rod shaped member; and an adjustment lever provided on the base end section of the rod shaped member so as to rotate the rod shaped member.