Koyo Seiko Company, Ltd.

Masaru Goto

Tomohiro Ishii

Motoshi Kawamura

Nobuyuki Seo

Eiji Murata

It is an object of the invention to provide a wheel bearing having a hub which can be worked without requiring different jigs and the like depending on the position to be worked, in which it is not required to dispose a dog or the like, and which is reduced in weight. In a wheel bearing comprising a hub which is to be fixed to the side of a wheel, and an outer race which is to be fixed to the side of a vehicle body, a noncircular hole is formed in a center area of an inner side of an annular portion which is formed in the vicinity of the root of the flange of the hub which constitutes the wheel bearing, and in a side opposite to the shaft body in the axial direction.

Wheel bearing

A wheel bearing device is provided in which the cutting amounts of end faces in a simultaneous process substantially balance with each other, so that a polishing process is facilitated and the tightening axial force of a nut can be stabilized. A wheel bearing device has an outer race which serves also as a housing; an inner race which serves also as a shaft; an inner race member which is fittingly fixed to the shaft which is the inner race; rolling elements and a cage which are disposed in an annular space between the outer race, and the inner race and the inner race member; and a nut which fixes the inner race member to the inner race by an axial force. In the wheel bearing device, the inner race member is formed so that the area of an end face abutting against a step portion of the shaft of the inner race is substantially equal to the area of an end face abutting against a bearing surface of the nut. The step portion is formed so that an outer peripheral end of the end face abutting against the bearing surface of the nut is positioned inside an end of the bearing surface of the nut.

Growing community of inventors

Yamatokoriyama, Japan

Masaru Goto