Patent ID: 6021685
Filing Date: 2000-02-08
Classification: B62D,F16C

Abstract:
A rack-pinion type power steering apparatus comprising:a cylindrical stub shaft which rotates in a steering body upon a steering operation;a torsion bar having one end fixed at one end of said stub shaft and extending through said stub shaft toward the other end of said stub shaft;a pinion shaft pivotally connected to the other end of said torsion bar, wherein a distal end portion of said pinion shaft is sized to loosely fit within an axial support portion of a distal end of said steering body;a rotor arranged to cover said torsion bar from said stub shaft along an extending direction of said torsion bar; anda sleeve having one end integrally connected to said pinion shaft, extending from said pinion shaft along said stub shaft, and arranged around said rotor to constitute a rotary type channel selector valve between said rotor and said sleeve,wherein said pinion shaft is axially supported by said steering body at two end portions of said sleeve;wherein said distal end portion of said pinion shaft away from said sleeve is axially supported by said steering body through the axial support portion having a bearing gap which is slightly larger than a bearing gap of either one of said axial support portions at said two end portions of said sleeve.