Patent ID: 7487990

Claim:
A semitrailer coupling comprising a coupling plate and a bearing block for movable fastening of the coupling plate to a frame of a tractor, the bearing block includes a bearing region and a fastening region, the bearing region includes bearing means for pivotable bearing of the coupling plate about axis (y) and the fastening region includes fastening means for detachable fastening of the coupling plate to the frame of the tractor, wherein the bearing region has a larger cross section than that the fastening region, when the bearing block is viewed in section in the direction of travel (x) and parallel to pivoting axis (y), wherein between the bearing region of the bearing block and the receiving region of the coupling plate is a clearance wherein the clearance S between the bearing block and the coupling plate along the pivoting axis (y) is greater than the clearance elsewhere, wherein the clearance S compensates for movement of the coupling plate in the direction of the pivoting axis (y).