Bearings – Rotary bearing – Antifriction bearing
Patent
1983-03-09
1985-12-10
Footland, Lenard A.
Bearings
Rotary bearing
Antifriction bearing
F16C 3336
Patent
active
045576130
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
REFERENCES:
patent: 3527513 (1970-09-01), Hewko
patent: 3963285 (1976-06-01), Kellstrom
patent: 3990753 (1976-11-01), Kellstrom et al.
patent: 4023869 (1977-05-01), Caldwell
patent: 4065191 (1977-12-01), Kellstrom
Hingley Colin G.
Tallian Tibor E.
Footland Lenard A.
Renz Jr. Eugene E.
SKF Industries, Inc.
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