Quick coupling for coupling a tool to the boom of a working machine, in particular of a wheel loader, comprising: - a quick coupling part at the boom side and a quick coupling part at the tool side; and - an energy circuit coupling for the automatic coupling of an energy connector at the tool side to an energy connector at the boom side, - wherein the quick coupling parts are reversibly latchable to one another via a pair of spaced latching axles; - wherein the energy circuit coupling comprises an energy coupling part at the boom side and at the tool side that are arranged at the quick coupling parts such that they move toward one another and thereby automatically couple with one another by the pivoting together of the two quick coupling parts about a first latching axle on a circular path about the first latching axle; - wherein at least one movable energy coupling part is pivotable about an axle in parallel with the first latching axle and is movably supported perpendicular thereto; and - wherein the energy circuit coupling comprises a linear guide that is configured to compensate the relative movement of the two energy coupling parts occurring along a circular path on the pivoting together of the quick coupling parts in cooperation with the movable support of the movable energy coupling parts and to guide the two energy coupling parts linearly with respect to one another during coupling, characterized by - a centering device by means of which the movable energy coupling part is holdable in a central position independently of its alignment and a movement of the movable energy coupling part relative to the quick coupling part fastened thereto is preventable in the absence of an external force, - wherein the centering device is configured to enable a movement of the movable energy coupling part relative to the quick coupling part fastened thereto on the automatic coupling with the other energy coupling part due to an external force generated by the coupling procedure, - wherein the centering device comprises at least one centering element that is fixedly supported at the quick coupling part and holds the movable energy coupling part in the central position in a force-fitting and/or form-fitting manner in the absence of an external force, and - wherein the movable energy coupling unit is supported at the quick coupling part via a spring device that presses the movable energy coupling part against the centering element and thereby holds it in the central position or moves it into it. - a quick coupling part at the boom side and a quick coupling part at the tool side; and - an energy circuit coupling for the automatic coupling of an energy connector at the tool side to an energy connector at the boom side, - wherein the quick coupling parts are reversibly latchable to one another via a pair of spaced latching axles; - wherein the energy circuit coupling comprises an energy coupling part at the boom side and at the tool side that are arranged at the quick coupling parts such that they move toward one another and thereby automatically couple with one another by the pivoting together of the two quick coupling parts about a first latching axle on a circular path about the first latching axle; - wherein at least one movable energy coupling part is pivotable about an axle in parallel with the first latching axle and is movably supported perpendicular thereto; and - wherein the energy circuit coupling comprises a linear guide that is configured to compensate the relative movement of the two energy coupling parts occurring along a circular path on the pivoting together of the quick coupling parts in cooperation with the movable support of the movable energy coupling parts and to guide the two energy coupling parts linearly with respect to one another during coupling, - a centering device by means of which the movable energy coupling part is holdable in a central position independently of its alignment and a movement of the movable energy coupling part relative to the quick coupling part fastened thereto is preventable in the absence of an external force, - wherein the centering device is configured to enable a movement of the movable energy coupling part relative to the quick coupling part fastened thereto on the automatic coupling with the other energy coupling part due to an external force generated by the coupling procedure, - wherein the centering device comprises at least one centering element that is fixedly supported at the quick coupling part and holds the movable energy coupling part in the central position in a force-fitting and/or form-fitting manner in the absence of an external force, and - wherein the movable energy coupling unit is supported at the quick coupling part via a spring device that presses the movable energy coupling part against the centering element and thereby holds it in the central position or moves it into it.