Wheel bearing apparatus
First Claim
1. A wheel bearing apparatus comprising:
- an outer member integrally formed with double row outer raceway surfaces on its inner circumference, each outer raceway surface has a circular arc cross-section;
an inner member includes a wheel hub and at least one inner ring, the wheel hub has at its one end an integrally formed wheel mounting flange, an axially cylindrical portion extends from the wheel mounting flange, the inner ring is fit onto the cylindrical portion, the inner member outer circumference includes the inner raceway surfaces, each inner raceway surface has a circular arc cross-section and is adapted to be arranged opposite to one of the double row outer raceway surfaces;
double row rolling elements are freely rollably contained between the outer raceway surfaces and the inner raceway surfaces via cages; and
seals are mounted in openings at both ends of an annular space formed between the outer member and the inner member;
a shoulder height (H) of the inner ring is set within a range of 0.4-0.8 times a diameter (d) of the ball (H/d=0.4-0.8); and
a shoulder height (δ
) of a smaller diameter portion formed on the outermost circumference of the inner ring is set to a value δ
/d≧
0.35 so that the smaller diameter portion diameter is larger than the inner ring diameter at a bottom of the inner raceway surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A wheel bearing apparatus has an outer member, an inner member, and double row rolling elements are contained between the outer raceway surfaces. Seals are mounted in openings formed between the outer member and the inner member. A shoulder height H of the inner raceway surface of the inner ring is set with a range of 0.4-0.8 times a diameter “d” of the ball (H/d=0.4-0.8). A shoulder height δ of a smaller diameter portion formed on the outermost circumference of the inner ring is set to a value δ/d≧0.35. A corner, formed by the tapered surface and the inner raceway surface, is rounded to have a circular arc cross-section. A shoulder height H1 of the inner raceway surface from its bottom to the corner is set within a range of 0.40-0.50 times a diameter of the ball (d) (H1/d=0.40-0.50).
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Citations
10 Claims
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1. A wheel bearing apparatus comprising:
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an outer member integrally formed with double row outer raceway surfaces on its inner circumference, each outer raceway surface has a circular arc cross-section; an inner member includes a wheel hub and at least one inner ring, the wheel hub has at its one end an integrally formed wheel mounting flange, an axially cylindrical portion extends from the wheel mounting flange, the inner ring is fit onto the cylindrical portion, the inner member outer circumference includes the inner raceway surfaces, each inner raceway surface has a circular arc cross-section and is adapted to be arranged opposite to one of the double row outer raceway surfaces; double row rolling elements are freely rollably contained between the outer raceway surfaces and the inner raceway surfaces via cages; and seals are mounted in openings at both ends of an annular space formed between the outer member and the inner member; a shoulder height (H) of the inner ring is set within a range of 0.4-0.8 times a diameter (d) of the ball (H/d=0.4-0.8); and a shoulder height (δ
) of a smaller diameter portion formed on the outermost circumference of the inner ring is set to a value δ
/d≧
0.35 so that the smaller diameter portion diameter is larger than the inner ring diameter at a bottom of the inner raceway surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification