Spherical roller bearing having reciprocal crowning for skew control
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United States of America Patent
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-
Dec 10, 1985
Issued Date -
N/A
app pub date -
Mar 9, 1983
filing date -
Sep 1, 1978
priority date (Note) -
Expired
status (Latency Note)
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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
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