Vehicle bearing device
AssigneeDenso Corporation
InventorShigenobu Nakamura
Life of this patent
Estimating the term…
Abstract
A bearing device includes a pair of bearings. One of the bearings is exposed to a higher temperature condition than the other. Each of the bearings has an outer ring, an inner ring, a plurality of rolling members disposed in a space between the outer ring and the inner ring and a pair of sealing members fixed to the outer ring. Each of the sealing members has an elastic lip in contact with an outer surface of the inner ring, and the lip of the bearing exposed to a higher temperature condition is made of a material that is more heat-resistant than the lip of the other sealing member.
Claims9
A bearing device including a pair of bearings, one of which is exposed to a higher temperature condition than the other, each of said bearings having an outer ring, an inner ring, a plurality of rolling members disposed in a space between said outer ring and said inner ring and a pair of sealing members fixed to said outer ring to respectively cover said space, each of said sealing members having an elastic lip in contact with outer surfaces of a corresponding one of said inner rings, and a shaft rotatably supported by said pair of bearings, wherein
- said lip of one of said pair of bearings exposed to a lower temperature is made of one of nitrile rubber and acrylic rubber, and the other lip exposed to a higher temperature is made of a high temperature resistant material that is more heat-resistant than any one of nitrile rubber and acrylic rubber.
A bearing device including a pair of bearings, one of which is exposed to a higher temperature condition than the other, each of said bearings having an outer ring, an inner ring, a plurality of rolling members disposed in a space between said outer ring and said inner ring and a pair of sealing members fixed to said outer ring to respectively cover said space, each of said sealing members having an elastic lip in contact with outer surfaces of a corresponding one of said inner rings, and a shaft rotatably supported by said pair of bearings, wherein
- said lip of said bearing exposed to a higher temperature is made of a higher temperature resistant material than the other bearing and
- said outer ring of said bearing exposed to a higher temperature condition is made of high carbon-chromium bearing-steel that includes silicon at a ratio between 0.5% and 1.2%.
A bearing device including a pair of bearings, one of which is exposed to a higher temperature condition than the other, each of said bearings having an outer ring, an inner ring, a plurality of rolling members disposed in a space between said outer ring and said inner ring and a pair of sealing members fixed to said outer ring to respectively cover said space, each of said sealing members having an elastic lip in contact with outer surfaces of a corresponding one of said inner rings, and a shaft rotatably supported by said pair of bearings, wherein
- said lip of said bearing exposed to a higher temperature is made of a higher temperature resistant material than the other bearing and
- said outer ring of said bearing exposed to a higher temperature condition is made of high carbon-chromium bearing-steel that includes retained austenite at a ratio less than 10%.
A bearing device including a pair of bearings, one of which is exposed to a higher temperature condition than the other, each of said bearings having an outer ring, an inner ring, a plurality of rolling members disposed in a space between said outer ring and said inner ring and a pair of sealing members fixed to said outer ring to respectively cover said space, each of said sealing members having an elastic lip in contact with outer surfaces of a corresponding one of said inner rings, and a shaft rotatably supported by said pair of bearings, wherein
- said lip of said bearing exposed to a higher temperature is made of a higher temperature resistant material than the other bearing and
- said plurality of rolling members is made of one of stainless steel and ceramic.
Dependencies are inferred from the claim text.