Electric position adjustment apparatus for steering wheel

摘要

In order to make it possible to stably and smoothly perform the operation of position adjustment of a steering wheel 1, the electric position adjustment apparatus for a steering wheel of the present invention is such that: a concave engaging section 19a of a moving piece 16a that moves in the forward/backward direction with an electric motor 56 as a driving source has a cylindrical concave-shaped inner-circumferential surface; a cylindrical column section 65 of a transmission member 17a that transmits the movement of the moving piece 16a to a steering column 5b is inserted into the concave engaging section 19a by way of cylindrical spacer 72 and has a cylindrical convex-shaped outer-circumferential surface; and a cylindrical spacer 72 has a cylindrical convex-shaped outer-circumferential surface and a cylindrical concave-shaped inner-circumferential surface.

主权项

1. An electric position adjustment apparatus for a steering wheel, comprising:
a steering shaft, with a steering wheel being supported by and fastened to a rear-end section thereof; a column unit that comprises: a support section that extends in an axial direction of the steering shaft, supports the steering shaft on an inside thereof so as to be able to freely rotate, is supported by a portion that is fastened to a vehicle body or a vehicle body side bracket that is supported by a portion that is fastened to the vehicle body and does not displace during position adjustment of the steering wheel; and an adjusted section that is supported by the support section so as to be able to displace in the axial direction of the steering shaft with at least part of the steering shaft during position adjustment of the steering wheel; a moving piece that comprises a concave engaging section, and is able to displace in an axial direction of the column unit with an electric motor as a driving source; and a transmission member that comprises a base-end section that is connected to and fastened to the adjusted section, and a tip-end section that engages with the concave engaging section of the moving piece by way of a spacer, and that is able to transmit movement of the moving piece to the adjusted section, and the concave engaging section of the moving piece having a cylindrical concave-shaped inner-circumferential surface whose inner diameter does not change in an axial direction of the transmission member; the tip-end section of the transmission member having a cylindrical convex-shaped outer-circumferential surface whose outer diameter does not change in the axial direction of the transmission member; the spacer having a cylindrical convex-shaped outer-circumferential surface whose outer diameter does not change in the axial direction of the transmission member and having a cylindrical concave-shaped inner-circumferential surface whose inner diameter does not change in the axial direction of the transmission member.