Patent ID: 8657502
Filing Date: 2014-02-25
Classification: F16C,Y10T

Abstract:
1. An inner ring of a wheel bearing device that rotatably supports an axle, comprising: a first inner ring member; and a second inner ring member, wherein the first inner ring member has a first inner raceway surface on which wheel-side rolling elements roll, and a ring mounting surface which is beside the first inner raceway surface in an axial direction and on which a rotation speed detecting ring for detecting a rotation speed of the axle is mounted, and the first inner ring member is ground by a grinding wheel having a first grinding wheel surface and a second grinding wheel surface for grinding the first inner raceway surface and the ring mounting surface, respectively, and wherein the second inner ring member is arranged along an axis of the first inner ring member and has a second inner raceway surface on which vehicle body-side rolling elements roll, and the second inner raceway surface is ground by the first grinding wheel surface of the grinding wheel, and wherein the second inner ring member is formed such that an outside axial width of a portion that radially faces the second grinding wheel surface in a state where the second inner raceway surface is ground by the first grinding wheel surface of the grinding wheel is smaller than an outside axial width of the ring mounting surface of the first inner ring member such that the second inner raceway surface does not contact an outer peripheral surface of the end portion, and an outside diameter of the end portion is smaller than an outside diameter of the ring mounting surface.