Hub unit bearing for wheel
First Claim
1. A hub unit bearing comprising an axle hub, an outer joint member of constant velocity universal joint, and an axle bearing assembled into a unit, at least one of double row of inner raceways of the axle bearing being formed in the outer joint member, where a first hardened layer formed by quenching of the inner raceways of the outer joint member and a second hardened layer formed by quenching of ball grooves of the outer joint member are connected via a heat-affected zone incident to the first and second hardened layers.
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Accused Products
Abstract
A hub unit bearing for automotive wheel comprises an outer joint member of constant velocity universal joint, an axle hub and an axle bearing assembled into one unit, the axle hub and the outer joint member being separably joined in a socket-and-spigot joint fashion, face splines being formed in opposing end surfaces of the axle hub and the outer joint member, one of double rows of inner raceways of the axle bearing being formed in the outer joint member, and quench-hardened layers of the inner raceways and quench-hardened layers of the face splines being formed continuously. A heat-affected zone incident to the quench-hardened inner raceway of the outer joint member may also be formed continuously with a heat-affected zone incident to quench-hardened ball grooves of the outer joint member.
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Citations
11 Claims
- 1. A hub unit bearing comprising an axle hub, an outer joint member of constant velocity universal joint, and an axle bearing assembled into a unit, at least one of double row of inner raceways of the axle bearing being formed in the outer joint member, where a first hardened layer formed by quenching of the inner raceways of the outer joint member and a second hardened layer formed by quenching of ball grooves of the outer joint member are connected via a heat-affected zone incident to the first and second hardened layers.
- 5. A hub unit bearing comprising an axle hub, an outer joint member of constant velocity universal joint, and an axle bearing assembled into a unit, wherein at least one of double rows of inner raceways of the axle bearing is formed in the outer joint member, wherein the outer joint member has a mouth and a shank having a serrated part and a fitting part, an end face of the mouth on the shank side abutting against the axle hub, the axle hub having a serrated part and a fitting part formed therein that corresponds to the serrated part and fitting part of the shank such that the shank and the axle hub are separately coupled, the separable coupling being effected between the double rows of inner raceways of the axle bearing.
- 10. A hub unit bearing comprising an axle hub, an axle bearing for rotatably supporting said axle hub through double rows of rolling elements, and an outer joint member of a constant velocity universal joint coaxially coupled to said axle hub, wherein a shank of said axle hub has a tubular hollow structure throughout its length, the shank being fitted into an opening formed in the outer joint member, wherein the axle hub and the outer joint member are joined together by staking and welding.
Specification