Wheel bearing apparatus for a vehicle

Details Wheel bearing apparatus for a vehicle Wheel bearing apparatus for a vehicle

2009-05-06

2011-11-01

Hannon, Thomas R (Department: 3656)

Bearings

Rotary bearing

Antifriction bearing

Reexamination Certificate

active

08047722

ABSTRACT:
A vehicle wheel bearing apparatus has a substantially cylindrical outer ring formed with double row outer raceway surfaces on its inner circumference and with press fitting surfaces on its outer circumferences of its cylindrical portions. A pair of inner rings is formed with inner raceway surfaces on their outer circumferences. The inner rings cylindrical portions have fitting surfaces on their inner circumferences. The fitting surfaces fit onto a cylindrical portion of a wheel hub. The inner rings are adapted to be arranged so that end faces of the cylindrical portions abut each other. Double row rolling elements are freely rollably arranged between outer and inner raceway surfaces. At least the outer ring of the outer and inner is formed by pressing or rolling from a plate member or a pipe member. The outer ring and the inner rings have cylindrical portions axially extending, respectively, from the outer raceway surfaces and the inner raceway surfaces. The thickness of the cylindrical portions of the outer ring is thinner than that of the outer raceway surfaces. Seals are arranged in annular spaces formed between the inner circumferences of the cylindrical portions of the outer ring and the outer circumferences of the cylindrical portions of the inner rings. The seals are adapted to be press-fit into the inner circumferences of the cylindrical portions of the outer ring. The double row outer raceway surfaces of the outer ring and the inner raceway surfaces of the inner ring are surface hardened.

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