Wheel rolling bearing device
AssigneeJtekt Corporation
InventorTatsuya Yokota
Life of this patent
Estimating the term…
Abstract
In a wheel rolling bearing device, where a pitch diameter of the inner-row ball set is D1 and a pitch diameter of the outer-row ball set is D2, D1 and D2 are set so as to satisfy the relationship “D1<D2”. Where an angle of a raceway circular arc from an intersection point of each inner-row ball with the inner-side outer ring raceway surface at a contact angle to a boundary portion of an inner-side raceway shoulder is θ1 and an angle of a raceway circular arc from an intersection point of each outer-row ball with the outer-side outer ring raceway surface at a contact angle to a boundary portion of an outer-side raceway shoulder is θ2, θ1 and θ2 are set so as to satisfy the relationship “θ1<θ2”.
Claims6
A wheel rolling bearing device in which an inner-side inner ring raceway surface and an outer-side inner ring raceway surface are formed at a predetermined interval in an axial direction on an outer peripheral surface of a hub spindle of a hub wheel to which a wheel is connected, an inner-side outer ring raceway surface and an outer-side outer ring raceway surface are formed at a predetermined interval in the axial direction on an inner peripheral surface of an outer ring member arranged on an outer periphery of the hub spindle, inner-row balls are rollably arranged between the inner-side inner ring raceway surface and the inner-side outer ring raceway surface, outer-row balls are rollably arranged between the outer-side inner ring raceway surface and the outer-side outer ring raceway surface, wherein:
- a pitch diameter of the inner-row balls is less than a pitch diameter of the outer-row balls;
- an angle of a raceway circular arc measured from a contact point of each inner-row ball with the inner-side outer ring raceway surface to an outer-side edge of the inner-side outer ring raceway surface is less than an angle of a raceway circular arc measured from a contact point of each outer-row ball with the outer-side outer ring raceway surface to an inner-side edge of the outer-side outer ring raceway surface, and
- the contact point of each inner-row ball with the inner-side outer ring raceway surface diametrically opposes the contact point of each outer-row ball with the outer-side outer ring raceway surface.
A wheel rolling bearing device comprising:
- a hub wheel including a hub spindle;
- an outer ring member arranged on an outer periphery of the hub spindle;
- an inner-side inner ring raceway surface on an outer peripheral surface of the hub spindle;
- an outer-side inner ring raceway surface on the outer peripheral surface of the hub spindle, the inner-side inner ring raceway surface and the outer-side inner ring raceway surface being formed at a predetermined interval in an axial direction of the outer peripheral surface of the hub spindle;
- an inner-side outer ring raceway surface on an inner peripheral surface of the outer ring member;
- an outer-side outer ring raceway surface on the inner peripheral surface of the outer ring member, the inner-side outer ring raceway surface and the outer-side outer ring raceway surface being formed at a predetermined interval in the axial direction of the inner peripheral surface of the outer ring member;
- inner-row balls rollably arranged between the inner-side inner ring raceway surface and the inner-side outer ring raceway surface;
- and
- outer-row balls rollably arranged between the outer-side inner ring raceway surface and the outer-side outer ring raceway surface, wherein:
- a pitch diameter of the inner-row balls is less than a pitch diameter of the outer-row balls,
- an angle of a raceway circular arc measured from a contact point of each inner-row ball with the inner-side outer ring raceway surface to an outer-side edge of the inner-side outer ring raceway surface is less than an angle of a raceway circular arc measured from a contact point of each outer-row ball with the outer-side outer ring raceway to an inner-side edge of the outer-side outer ring raceway surface, and
- the contact point of each inner-row ball with the inner-side outer ring raceway surface is diametrically opposed to the contact point of each outer-row ball with the outer-side outer ring raceway surface.
Dependencies are inferred from the claim text.