Patent ID: 6808042
Filing Date: 2004-10-26
Classification: B62D

Abstract:
An electric power steering apparatus for a vehicle, comprising:a motor having a rotor, a stator and a motor shaft inside the same; a housing installed such that it can communicate with the motor; a rack bar installed inside of the motor and housing and having a ball screw installed at an outer circumferential surface of one end and a rack gear formed at an outer circumferential surface of the other end; a ball nut installed at the outside of the ball screw for supporting the rack bar at a first point and moving the rack bar in the axial direction; and a rack guide installed at the inside of the housing for supporting the rack bar at a second point and guiding axial movement by enclosing a rear surface of the rack gear, wherein said rack bar is supported at a third point by a supporting bush disposed inside of a front end of the housing adjacent to the rack guide, wherein at an inner circumferential surface of the supporting bush, a clearance recess is provided for separating an edge of the rack gear from the inner circumferential surface of the supporting bush, in order to prevent abrasion caused by friction between the supporting bush and the rack gear.