Plug clamp coupling for docking units at a machine tool carrier plate has a sprung ring clamping piston with clamping balls which can be retracted by clamping pins on release through compressed air acting on the ring piston

摘要

The plug clamp coupling, to clamp a variety of docking units at a carrier plate for machine tools, etc., has a sprung ring clamping piston (7) with an integrated cone (21), together with clamping balls (10) in a circle of drillings (11) and clamping pins (12). On the application of compressed air to the piston (7), at 6-7 bar, it is pressed upwards and the clamping balls (10) are relieved to release their grip. As the docking unit is pulled clear, the balls (10) are retracted into a ring chamber (22) by the clamping pins (12). Simultaneously, the locking piston bush (14) is pushed by its spring (15) into the drilling (24) of the ball clamping bush (4) and limited by a shoulder to retain the balls (10) while the O-ring (23) seals the housing (1).