Steering column apparatus

摘要

A steering column apparatus has a fixed bracket fixed to a vehicle body and having a pair of long holes extending parallel to each other along a backward-and-forward direction; a movable bracket arranged movably in the backward-and-forward direction; a pair of bolts and a pair of nuts for fixing the movable bracket to a rear portion of the fixed bracket so that the movable bracket can move in the backward-and-forward direction with respect to the fixed bracket; a spring plate having pressing portions for holding the movable bracket at the rear portion of the fixed bracket by pressing the fixed bracket against the movable bracket; a shear pin connecting the fixed bracket and the movable bracket at the rear portion of the fixed bracket; and first and second low friction elements. Upon a secondary collision, the movable bracket smoothly moves toward a vehicle front side together with the spring plate.

主权项

1. A steering column apparatus comprising:
a fixed bracket which is fixed to a vehicle body, the fixed bracket having;
(a) a flat attachment portion;(b) a pair of long holes formed on the attachment portion so as to extend substantially parallel to each other along a backward-and-forward direction of the vehicle body; and(c) a fitting hole formed on the attachment portion; a movable bracket which is arranged below the attachment portion of the fixed bracket movably in the backward-and-forward direction of the vehicle body with respect to the fixed bracket and supports a steering column, the movable bracket having;
(d) an attachment part;(e) a pair of inserting holes formed on the attachment part; and(f) a fitting hole formed at a corresponding position to the fitting hole of the fixed bracket on the attachment part; a pair of bolts and a pair of nuts, a pair of the bolts inserted in a pair of the long holes and a pair of the inserting holes and screwed into a pair of the nuts, which fix the movable bracket to a rear portion of the fixed bracket so that the movable bracket can move in the backward-and-forward direction of the vehicle body with respect to the fixed bracket; a spring plate which is arranged between an inner side edge surface of the bolt or the nut and the fixed bracket, the spring plate having;
(g) pressing portions formed at front and rear positions of the spring plate with respect to a pair of the bolts and extending toward the fixed bracket from the spring plate, for holding the movable bracket at the rear portion of the fixed bracket by pressing the fixed bracket against the movable bracket on a pair of lines that extend substantially parallel to each other and orthogonally to the long holes of the fixed bracket; a shear pin which is fitted into the fitting hole of the fixed bracket and the fitting hole of the movable bracket and connects the fixed bracket and the movable bracket at the rear portion of the fixed bracket; a first low friction element which is provided between the fixed bracket and the movable bracket; and a second low friction element which is provided between the fixed bracket and the spring plate.