Short-range reinforcement locking, unlocking and pushing-away pneumatic device

The invention discloses a short-range reinforcement locking, unlocking and pushing-away pneumatic device. The device comprises an upper die first assembly, a lower die first assembly, a steel ball, a piston rod, a wave spring, a piston rod retraction pneumatic connector, a piston rod extension pneumatic connector, an upper die second assembly, a lower die second assembly, an adjusting bolt, a gasket and an electromagnetic valve. The top end of the lower die second assembly is in matched connection with the bottom end of the lower die first assembly, and the lower die first assembly and the upper die first assembly are correspondingly connected. The device is novel in structure, by means of the structure, not only is the locking force increased, but also the stroke of the piston rod is shortened, meanwhile, the piston rod is pushed to move by means of the added elastic force of the wave spring, rated locking force can be met, self-balancing is achieved, stress in the device is smoother and more uniform in the