Wheel bearing device
First Claim
1. A wheel bearing device, comprising a hub ring, a constant velocity universal joint and a double-row bearing which are unitized, at least one of inner raceways of double-row raceways of the bearing and a wheel mounting flange being formed on the hub ring, a stem portion of a joint outer ring of the constant velocity universal joint being fitted into the hub ring through torque transmission means, wherein a surface-hardened layer is formed at least on an outboard base portion of a wheel mounting flange,wherein the base portion is a fillet portion on a region extending from a brake rotor mounting surface to a tubular pilot portion.
1 Assignment
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Accused Products
Abstract
A wheel bearing device having a unitized hub ring, double-row bearing and constant velocity universal joint with one of double-row inner raceways formed on the joint outer ring. An end portion of the joint outer ring is fitted to an outside periphery of the hub ring through serrated portions. The hub ring is plastically deformed and expanded from an inside diameter side toward an outside diameter side by pushing a steel ball into a through hole of the hub ring preventing play in the serrated portions by the diameter expansion. A surface-hardened layer is formed at least on a base portion of the wheel mounting flange.
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Citations
26 Claims
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1. A wheel bearing device, comprising a hub ring, a constant velocity universal joint and a double-row bearing which are unitized, at least one of inner raceways of double-row raceways of the bearing and a wheel mounting flange being formed on the hub ring, a stem portion of a joint outer ring of the constant velocity universal joint being fitted into the hub ring through torque transmission means, wherein a surface-hardened layer is formed at least on an outboard base portion of a wheel mounting flange,
wherein the base portion is a fillet portion on a region extending from a brake rotor mounting surface to a tubular pilot portion.
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9. A wheel bearing device comprising a hub ring, a constant velocity universal joint and a double-row bearing which are unitized, at least one of inner raceways of double-row raceways of the bearing and a wheel mounting flange being formed on the hub ring, a stem portion of a joint outer ring of the constant velocity universal joint being fitted into the hub ring through torque transmission means, wherein a surface-hardened layer is formed at least on an outboard base portion of a wheel mounting flange,
wherein a surface hardness of the surface-hardened layer is from HRC 40 through 63 with the depth being from 0.3 through 2 mm.
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16. A wheel bearing device comprising a hub ring, a constant velocity universal joint and a double-row bearing which are unitized, at least one of inner raceways of double-row raceways of the bearing and a wheel mounting flange being formed on the hub ring, a stem portion of a joint outer ring of the constant velocity universal joint being fitted into the hub ring through torque transmission means, wherein a surface-hardened layer is formed at least on an outboard base portion of a wheel mounting flange,
wherein the hub ring is made of carbon steel containing C from 0.5 through 0.8 wt %.
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22. A wheel bearing device comprising a hub ring, a constant velocity universal joint and a double-row bearing which are unitized, at least one of inner raceways of double-row raceways of the bearing and a wheel mounting flange being formed on the hub ring, a stem portion of a joint outer ring of the constant velocity universal joint being fitted into the hub ring through torque transmission means, wherein a surface-hardened layer is formed at least on an outboard base portion of a wheel mounting flange,
wherein a serrated portion is formed on an inside periphery of the hub ring and a surface-hardened layer is formed on the serrated portion.
Specification