Hydraulic control mechanism for operating clamping devices against machine tools, has oil tank to transfer oil to workspaces, and having filling unit to feed compressed air into pneumatic cylinder via three manually operable pilot valves

摘要

The mechanism has hydraulic aggregates (14, 15) including plungers (28, 29) that act as a movement unit with a drive piston of a pneumatic cylinder. An oil tank (75) transfers oil to workspaces (34, 35) that are limited by the plungers. The tank has a filling unit (95) for feeding compressed air into the cylinder via three manually operable pilot valves. A fluid impacting surface of the plungers is set smaller than the piston.