Roller bearing for use in oscillatory applications

Details Roller bearing for use in oscillatory applications Roller bearing for use in oscillatory applications

1994-12-07

1997-09-16

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

384558, 384565, 384572, F16C 1900, F16C 3349

Patent

active

056673124

ABSTRACT:
The invention provides a roller bearing apparatus including an inner ring member supported for rotation on a sleeve, an outer ring member, rollers in the raceway space defined between the inner and outer ring members, and a guide member having roller seats against which inboard end portions of the rollers are seated. To promote roller precession when the roller bearing apparatus is used in an oscillatory application, the roller seats are slanted or pitched in a circumferential direction and at least the inboard end portions of the rollers are provided with non-planar, and in one embodiment frustoconical, end faces. Cooperation between the non-planar end faces of the rollers and the pitched roller seats controls the mean skew axes of the rollers to promote consistent roller precession through the bearing load zone, and enables increased freedom of movement of the rollers to minimize friction. This increases the life of the roller bearing by reducing roller related failures. Additionally, when the rollers precess the inner ring member is encouraged to rotate relative to the sleeve to bring new inner race surface portions into the load zone. This reduces inner ring-related failures.

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For Design News by David J. Bak, "Nutating Bearing Offsets Oscillating Motion", pp. 126-127, 1984.
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