HYDRAULIC DRIVE OF A TWO-ARM CONTROL PRESS Russian patent published in 2004 - IPC

FIELD: designs of hydraulic drives for presses.

SUBSTANCE: the invention is dealt with the field of mechanical engineering, in particular, with designs of hydraulic drives used for presses with keeping an executive device under pressure. Two-arm control hydraulic drive of the press contains: a hydraulic cylinder, a three-position four-run changeover valve and a hydrolock installed in a main between a changeover valve and a head end of the hydraulic cylinder. Inlets of the three-position four-run changeover valve are connected to the pumping and the drain mains, and outlets - with the hydraulic cylinder piston and rod cavities. Between the three-position four-run changeover valve and the hydrolock there is a two-stage two-run throttling changeover valve. Both changeover valves are made controlled by handles with the forced return in a neutral position. A spring is installed in the rod end. The control handle of a two-run changeover valve is mechanically linked to the rod of control of the hydrolock. In result the invention ensures simplification of the control system, expansion of technological functionalities and reduction of costs.

EFFECT: the invention ensures simplification of the control system, expansion of technological functionalities and reduction of costs.

1 dwg