The utility model discloses a mounting structure for inciting somebody to action locking device subassembly is installed fast in side appearance group of manipulator, keep away from on detachable is fixed in side appearance group the one end of arm first fixed block, with should install installation piece and the quick lock plunger that complex is used for installing the locking device subassembly by first fixed block, first fixed block is kept away from the lateral surface of side appearance group is equipped with an arch to the evagination first mounting hole has been seted up in the arch, orientation on the installation piece the medial surface of first fixed block seted up with protruding unsmooth complex mounting groove the second mounting hole has been seted up corresponding to the position of first mounting hole on the cell wall of mounting groove, quick lock plunger and first mounting hole and second mounting hole locking cooperation with the installation piece is installed fast on first fixed block, the installation piece has the installation parts of the locking device unit mount of confession on it, the locking device subassembly through the cooperation of this installation piece and first fixed block quick install in in the side appearance group.