Patent ID: 7669689
Filing Date: 2010-03-02
Classification: B62D,F16H

Abstract:
1. An electric power steering apparatus comprising: a steering shaft to which a steering wheel is attached; an output shaft connected to the steering shaft; a motor outputting an assist torque to the output shaft; a pinion shaft which is connected to the output shaft via an intermediate shaft and comprising pinion teeth on outer circumference thereof; a rack shaft comprising rack teeth which engage with the pinion teeth provided on a part of an outer circumference thereof; and a rack supporting device comprising rolling elements which abut with a part of the outer circumference of the rack shaft which is opposite side of the part of the outer circumference of the rack shaft on which the rack teeth are provided, wherein the rack supporting device further comprises: a cylindrical holder having a pair of grooves extending in longitudinal direction; an auxiliary shaft of which both ends are attached to the grooves; and a bearing which rotatably supports the rolling element around the auxiliary shaft.