Patent ID: 6238095
Filing Date: 2001-05-29
Classification: F16C

Abstract:
A device for accommodating rotation about an axis X, said device comprising: an inner race having first and second tapered raceways presented outwardly away from the axis X, with the first raceway of the inner race being at an angle .alpha..sub.1 with respect to the axis X and the second raceway of the inner race being at an angle .alpha..sub.2 with respect to the axis X; an outer race having first and second tapered raceways presented inwardly toward the axis X, with the first raceway of the outer race being located opposite the first raceway of the inner race and at an angle .beta..sub.1 with respect to the axis X and the second raceway of the outer race being located opposite the second raceway of the inner race and at an angle .beta..sub.2 with respect to the axis X, the envelopes formed by first raceways intersecting the axis X generally at a first point and the envelopes formed by the second raceways intersecting the axis X generally at a second point, the envelopes formed by the raceways of the inner race intersecting each other at a point A that is generally between the first and second points and the envelopes formed by the raceways of the outer race also intersecting each other at a point C that is generally between the first and second points; first rollers located between the first raceways and having side and end surfaces, with the side surfaces being in essentially line contact with the first raceways and there being pure rolling contact between the side surfaces of the first rollers and the first raceways, each first roller having an axis U, there being an included angle .gamma..sub.1 between the axis U and the envelope for first raceway of the outer race and an included angle .delta..sub.1 between the axis U and the envelope for the first raceway for the inner race; and second rollers located between the second raceways, each second roller having large and small side surfaces, with the large side surface being essentially in line contact with one of the second raceways, and the small side surface being essentially in line contact with the other second raceway, there being pure rolling contact being the side surfaces of the second rollers and the second raceways that they contact, each second roller having an axis V, there being an included angle .gamma..sub.2 between the axis V and the envelope for the second raceway of the outer race and an included angle .delta..sub.2 between the axis V and the envelope for the second raceway of the inner race, each second roller also having an end face located beyond the large ends of the side faces, there being for each first roller a second roller generally aligned with it, whereby the first and second rollers are organized in sets, the first and second rollers in any set being in contact with each other along their end surfaces, so that the second roller prevents axial displacement of the first roller and vice versa, there being pure rolling contact between the end faces of the first and second rollers.