Rolling bearing
AssigneeNsk Ltd.
InventorsMichita Hokao, Kenichi Iso
Life of this patent
Estimating the term…
Abstract
In a rolling bearing, a plurality of rolling elements are rollably retained by a retainer between an inner ring and an outer ring, while being substantially equidistantly arranged. The rolling bearing is filled with a grease composition which contains a base oil including of fluorocarbon polymer oil, and a thickening agent including a polytetrafluoroethylene. A conductive material is added in an amount of 0.1 to 10 wt %, based on the total weight of the grease composition, to the grease composition.
Claims19
A rolling bearing comprising:
- an inner ring;
- an outer ring;
- a plurality of rolling elements arranged rotatably between the inner ring and the outer ring;
- a retainer for retaining the plurality of rolling elements;
- and
- a grease composition filled in a bearing space defined by the inner ring, the outer ring, and the rolling elements;
- wherein the grease composition contains a base oil including of fluorocarbon polymer oil, a thickening agent including a polytetrafluoroethylene, and a conductive material,
- wherein an amount of the conductive material contained in the grease composition is in a range from 0.1 to 10 wt % with respect to the total weight of the grease composition.
A rolling bearing being lubricated by grease and used for vehicle electrical component parts and engine auxiliary equipment, the rolling bearing comprising:
- an inner ring;
- an outer ring;.
- a plurality of rolling elements arranged rotatably between the inner ring, and the outer ring;
- a retainer for retaining the plurality of rolling elements;
- and a grease filling the rolling bearing;
- wherein the grease contains a base oil and a thickening agent including carbon black, the base oil is a synthetic oil having viscosity from 30 to 250 mm2/sec at 40° C., and the amount of the carbon black is within a range from 4 to 30 wt %, based on the total weight of the grease composition.
A rolling bearing being lubricated by grease and disposed in a vehicle electrical component part or engine auxiliary equipment driven by a belt, the rolling bearing comprising:
- an inner ring;
- an outer ring;
- a plurality of rolling elements arranged rotatably between the inner ring and the outer ring;
- a retainer for retaining the plurality of rolling elements;
- and
- a grease filling the rolling bearing,
- wherein the grease contains a base oil and a thickening agent including carbon black, the base oil is a synthetic oil having viscosity from 30 to 250 mm2/sec at 40° C., and the amount of the carbon black is within a range from 4 to 30 wt %, based on the total weight of the grease composition.
Dependencies are inferred from the claim text.