Roller bearings
AssigneeRHP Bearings Limited
InventorsFrank P. Wardle, Mark A. Harris
Life of this patent
Estimating the term…
Abstract
A roller bearing constructed in accordance with the invention comprises inner and outer rings and rollers therebetween as is known. The rings have no ribs, flanges or grooves but instead axial inner surfaces of the rings provide raceways which are substantially convex and the axial outer surfaces of the rollers are substantially concave to match. These concave and convex surfaces contact one another over contact zones. Each roller has an external surface which is asymmetrical relative to the center of the roller and the geometry is such that during use frictional moments develop at the contact zones between the rollers and the rings to generate a positive skew force on the rollers. This renders the bearing self-tracking.
Claims13
A roller bearing comprising inner and outer rings (11, 12) and a complement of rollers (13) therebetween each roller having an eternal surface (15) with an axial profile which is substantially concave and the inner and outer rings having raceways (21) with surfaces (16, 17) with axial profiles which are substantially convex and match the shape of the rollers;
- characterized in that each roller (13) has an external surface (15) which is asymmetrical relative to the center of the roller and the concave and convex surfaces contact one another over contact zones (20) such that during use resultant frictional moments generated in the contact zones between the inner and outer rings and the rollers provide positive skew to the rollers to control the tracking motion of the rollers.
Dependencies are inferred from the claim text.