Spherical roller bearing having reciprocal crowning for skew control
US4557613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1983 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Mar 9, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2240/50
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A roller bearing having inner and outer raceways and a series of rollers interposed between the raceways characterized by a roller profiled in a predetermined manner to produce a residual frictional moment when the bearing is loaded which tends to control the direction of roller skew. To provide the residual frictional moment, the roller is designed with a profile contour having a predetermined variable curvature and the inner and outer raceways are designed with a constant radius of curvature. Thus designed, the frictional moment distribution on the roller is made to produce a positive skew resulting in decreased heat generation, less bearing friction and longer bearing life. The principle of the invention applies to bearing assemblies having barrel-shaped rollers as well as assemblies having hour-glass shaped rollers. In assemblies with barrel-shaped rollers, the geometric relationships are preferably as follows: R.sub.r2 <R.sub.o <R.sub.r1 <R.sub.i wherein PA0 R.sub.r2 is the minimum radius of curvature of the roller profile; PA0 R.sub.o is the radius of curvature of the outer raceway; PA0 R.sub.r1 is the maximum radius of curvature of the roller profile; and PA0 R.sub.i is the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.