Patent ID: 8267593
Filing Date: 2012-09-18
Classification: B60B,F16C

Abstract:
1. A vehicle wheel bearing apparatus comprising: an outer member formed, on its inner circumference, with double row outer raceway surfaces; an inner member including a wheel hub formed on an outer circumference with a wheel mounting flange at one end, a cylindrical portion axially extends from the wheel mounting flange, at least one inner ring is press-fit onto the cylindrical portion of the wheel hub, via a predetermined interference, the inner member outer circumference includes double row inner raceway surfaces arranged opposite to the double row outer raceway surfaces; double row rolling elements are freely rollably contained between the outer and inner raceway surfaces of the outer and inner members, via cages; seals are mounted within annular openings formed between the outer and the inner members; a rolling bearing is fit onto the inner circumference of the wheel hub and positioned and secured by a retaining ring; the retaining ring is mounted at an inner side position of a bearing center line; a retaining ring groove, for mounting the retaining ring, is formed with a substantially rectangular cross-section; and outer side and inner side corner portions of the retaining groove are formed with circular arc cross-sections, each portion having a radius of curvature, the radius of curvature of the outer side corner portion is larger than the radius of curvature of the inner side corner portion.