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US 7,246,946 B2Granted
Rolling bearing unit for supporting wheel
AssigneeNsk Ltd.
InventorJunshi Sakamoto
Life of this patent
Estimating the term…
Abstract
Rotation torque of the hub rotating together with the road wheel is reduced to improve the driving performance of the vehicle such as acceleration performance, fuel consumption. The opening at both ends of the space where balls 14, 14 are provided is covered by seal rings 16c, 16d each having two or three seal lips. The whole rotation torque of the both seal rings 16c, 16d based on the friction between the seal lips and the mating surface is reglated between 0.06 N·m and 0.4 N·m.
Claims2
A rolling bearing unit for wheel support comprising a stationary race, a rotating race, a plurality of rolling bodies and a pair of seal rings,
- the stationary race being adapted to be supported by and fastened to a suspension device when in use,
- the rotating race being adapted to support and fasten to a road wheel when in use,
- the rolling bodies being located between stationary raceways and the surface of rotating raceways that are formed on facing peripheral surfaces of the stationary race and rotating race, respectively,
- wherein the pair of seal rings seal off openings on both ends of a space between the opposing peripheral surfaces of the stationary race and rotating race where the rolling bodies are located,
- both seal rings having at least two seal lips made of an elastic material,
- wherein the rotation resistance of both seal rings due to the friction between the seal lips and the opposing surface is a total of from 0.06 N·m to 0.4 N·m.
3 more elements
Dependencies are inferred from the claim text.