| 摘要 |
A shaft (12) driven via a power-transmitting element (19) is provided with a bearing ring (4) axially displaceable relative to a further bearing ring (5), and which, as a result of the moment of reaction, receives via the power-transmitting element (19) a force for axial displacement. To ensure that an automatic positioning of the two rings of angular-contact bearings (2, 3) dependent on the magnitude of the torque is effected, circumferentially spaced rolling bodies (28) are arranged at the output end of the power-transmitting element (19). For wedging in one or in both circumferential directions, these rolling bodies (28) are installed in respective axial recesses, each provided with an angular contact surface for the rolling body (28) in one or in both directions of rotation, in at least one of two axially opposite end faces (26, 27) between the power-transmitting element (19) and the axially displaceable bearing ring (4) connected with the shaft (12) in a manner precluding relative rotation. <IMAGE>
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