Axially pre-tensioned rolling contact bearing arrangement

Claim 1

Axially pre-tensioned rolling contact bearing arrangement of a shaft (10) in a casing (1), in which arrangement the shaft (10) exhibits at at least one of its two shaft ends a disk-shaped axially symmetric over-hung component (8, 11) and the two rolling contact bearings (12, 13), arranged inwards of the shaft ends, are axially rigidly clamped to the shaft (10) with their inner race and with their outer race are seated in one damping bush (14, 15) each which, in turn, are axially displaceably supported in the interior of a bearing bush (5), mounted in a bearing casing (2), at its two ends, furthermore with ducts (3, 4) for feeding lubricating oil to the rolling contact bearings (12, 13) and away from them back into an oil sump of a lubricating oil circuit, wherein the damping bushes (14, 15) are essentially bodies consisting of two bushes of different outside diameter, with one larger bush part (16, 17) each which accommodates the outer race of the rolling contact bearing (12, 13) concerned and is seated with radial play in the bearing bush (5) so that the outer surface of this larger bush part (16, 17) delimits, together with the hole of the bearing bush (5), accommodating it, an annular space, and one smaller bush part (18, 19) each which, with a circular cylindrical outer surface, is displaceably seated in a hole of the bearing bush (5) and, with the latter, delimits an annular duct (31, 32), which smaller bush parts (18, 19) each exhibit a hole, which, together with the shaft (10), delimit annular gaps which connect the rolling contact bearing spaces with the duct (4) for lubricant removal, the duct (3) for feeding lubricating oil to the rolling contact bearings (12, 13) communicates via oil feed holes (24, 25) in the bearing bush (5) with the abovementioned annular spaces between the outer surfaces of the larger bush parts (16, 17) and the bearing bush (5), the duct (3) furthermore communicates via oil feed holes (29, 30) n the bearing bush (5) with the annular ducts (31, 32), and these annular ducts (31, 32) are in conductive connection with the rolling contact body space of the rolling contact bearings (12, 13) via oil feed holes (33, 34) in the damping bushes (14, 15), the cross-section of the oil feed holes (33, 34) in the damping bushes (14, 15) being smaller than the cross-section of the oil feed holes (29, 30) in the bearing bush (5).