Auxiliary drive device for driveless vehicle trailers, in particular caravan shunting aid

摘要

The system has a carrier (3) fastened to a vehicle trailer in a region of a wheel (2), and a bearing carriage (4) slidably supported at the carrier. A drive motor (7) arranged at the bearing carriage rotatably drives a friction roller (11), which is engageable to the wheel for the accessory drive of the wheel. The accessory drive for displacement of the bearing carriage for the deliver of friction roller is transferred at the wheel from the drive motor over a selectively activatable gear arrangement (8).