Patent ID: 7604249

Claim:
Trailer coupling, comprising: a ball neck which can be moved between an operating position and a rest position and has a pivot-bearing body disposed at a first end and a coupling ball disposed at a second end, a vehicle-mounted pivot-bearing unit in which the pivot-bearing body is accommodated such that the pivot-bearing body can be pivoted about at least one pivot axis between the operating position and the rest position, and a rotation-blocking device having at least two rotation-blocking bodies, each of which can be moved in a guide direction with at least one component in a radial direction in relation to the at least one pivot axis, each of the at least two rotation-blocking bodies adapted to be engaged with, and disengaged from, a corresponding receiving space by movement in the respective guide direction, the rotation-blocking device having an actuating body which has at least one wedge surface running transversely to the guide direction, which actuating body can be moved in an actuating direction and is a common actuating body for the at least two rotation-blocking bodies, the movement of the actuating body in the actuating direction can move, and force, the at least two rotation-blocking bodies in the respective guide direction.