Change System for Loading Cranes

A system for changing work tools on a loading crane, the system comprising a first coupling member on a work tool side or a loading crane side with a receiving opening and a second coupling member on the loading crane side or the work tool side with a guide member extending along a longitudinal axis, the guide member engageable in the receiving opening of the first coupling member by moving the first coupling member and the second coupling member toward each other in the direction of the longitudinal axis, with the first coupling member comprising a support surface for axially abutting the second coupling member and with the second coupling member comprising a bearing surface complementary to the support surface and at least one locking element which is moveable by means of a drive at right angles relative to the longitudinal axis of the second coupling member between a disengaged position and a retaining position, wherein the at least one locking element has a clamping surface for frictionally abutting the first coupling member and wherein the first coupling member has an abutment surface complementary to the clamping surface for zero-play axial clamping of the first coupling member and the second coupling member.