Back to results
US 8,523,451 B2Granted
Roller bearing
AssigneeNtn Corporation
InventorsTakuya Ozu, Naoki Matsumori
Life of this patent
Estimating the term…
Abstract
A roller bearing has spacers interposed between its rollers. The roller bearing also has a high permissible rotational speed which is achieved by allowing a lubricant to flow smoothly around rolling surfaces so that the stirring resistance of the lubricant due to the spacers is reduced. The roller bearing includes a plurality of rotatable rollers interposed between an inner ring raceway surface and an outer ring raceway surface and spacers provided between adjacent rollers. Each of the spacers includes extended portions facing roller end faces of the rollers at both axial ends thereof.
Claims21
A roller bearing comprising:
- an inner ring raceway surface;
- an outer ring raceway surface;
- a plurality of rollers interposed between the inner ring raceway surface and the outer ring raceway surface;
- and
- a plurality of spacers, each of the spacers being provided between an adjacent pair of the rollers, and each of the spacers having at both axial ends thereof extended portions each facing end faces of the adjacent pair of the rollers,
- wherein each of the end faces of the rollers has a recessed portion formed therein and each of the extended portions of the spacers has a protruding portion that protrudes toward a corresponding one of the end faces of the rollers and extends into the recessed portion,
- wherein two of the protruding portions extend into each of the recessed portions,
- wherein the protruding portions and the recessed portions are arranged so as not to contact each other once mounted in the roller bearing, and
- wherein the outer ring raceway surface is a single continuous surface having a constant width and that forms a complete circle.
6 more elements
Dependencies are inferred from the claim text.