Wheel bearing device and method of manufacturing the same
First Claim
1. A wheel bearing device in which a hub ring, a constant velocity universal joint and a bearing are unitized together, the hub ring and an outer joint member of the constant velocity universal joint are fitted together, and, of inner raceways in double rows of the bearing, one of the inner raceways is formed at the hub ring while the other inner raceway is formed at the outer joint member,wherein a hardened irregular portion is formed at an outside-diameter side member at a fit portion where the hub ring and the outer joint member are fitted together while a low hardness portion having a hardness lower than that of the irregular portion is provided at an inside-diameter side member, and the hub ring and the outer joint member are unitized together through expansion in diameter of the low hardness portion to make the low hardness portion bite into the irregular portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A wheel bearing device is provided to prevent loosening of a hub ring and an outer joint ring that are fitted together. An irregular portion treated with hardening is formed on a fit face of the hub ring on an inside periphery of which the outer joint member is fitted. A low hardness portion of the outer joint member formed with hardness lower than that of the irregular portion is expanded in diameter to make it bite into the irregular portion. In this way the hub ring and the outer joint ring are unitized together.
22 Citations
16 Claims
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1. A wheel bearing device in which a hub ring, a constant velocity universal joint and a bearing are unitized together, the hub ring and an outer joint member of the constant velocity universal joint are fitted together, and, of inner raceways in double rows of the bearing, one of the inner raceways is formed at the hub ring while the other inner raceway is formed at the outer joint member,
wherein a hardened irregular portion is formed at an outside-diameter side member at a fit portion where the hub ring and the outer joint member are fitted together while a low hardness portion having a hardness lower than that of the irregular portion is provided at an inside-diameter side member, and the hub ring and the outer joint member are unitized together through expansion in diameter of the low hardness portion to make the low hardness portion bite into the irregular portion.
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4. A wheel bearing device in which a hub ring and a bearing are unitized together, the hub ring and an inner ring of the bearing are fitted together, and, of inner raceways in double rows of the bearing, one of the inner raceways is formed at the hub ring while the other inner raceway is formed at the inner ring,
wherein a hardened irregular portion is formed at an outside-diameter side member at the fit portion of the hub ring and the inner ring while a low hardness portion having a hardness lower than that of the irregular portion is provided at an inside-diameter side member, and the hub ring and the inner ring are unitized together through expansion in diameter of the low hardness portion to make the low hardness portion bite into the irregular portion.
Specification