| 主权项 |
1. A roller device (10) for a traction mechanism drive of a motor vehicle, comprising:
a roller element (12) for introducing a torque provided by the traction mechanism of the traction mechanism drive, a driven shaft (22) for driving an auxiliary unit of the motor vehicle, and a magnetic coupling (18) for non-positive torque transfer between the roller element (12) and the driven shaft (22), the magnetic coupling (18) includes a primary-side unit (16) connected to the roller element (12) with at least one primary magnetic element (24) and a secondary-side unit (20) connected to the driven shaft (22) with at least one secondary-side magnetic element (26), the magnetic elements (24, 26) are at least one of permanent magnetic or electromagnetic elements and the non-positive torque transfer is realized by the magnetic fields of the primary-side and the secondary-side magnetic elements (24, 26), at least one of the magnetic elements (24, 26) of the two units (16, 20) is arranged to be movable within the respective primary-side or secondary-side unit (16, 20) for changing a magnetic field overlap of magnetic fields of the primary-side and secondary-side magnetic elements (24, 26). |
