Quick clamping unit closing unit therefor and quick clamping system

The invention relates to a quick-action clamping unit having formed from a base body chip pickup, with at least one relative to the basic body between an unlocking position and a locking position movably arranged clamping element, with a cylinder and a disposed in the cylinder, with the cylinder at least one pressure space delimiting piston member, wherein upon pressurizing the pressure chamber, the clamping element is moved into the locking position or the unlocking position, wherein the piston member are formed as compared with the base body fixed piston member and the cylinder as compared to the basic body and piston element movable cylinder member. The invention also relates to a shutter unit for such a quick-action clamping unit and a clamping system.