HYDRAULIC DRIVE Russian patent published in 2000 - IPC

FIELD: mechanical engineering; standard-unit- type machines and transfer lines. SUBSTANCE: hydraulic drive is designed to control operation of power table hydraulic cylinder of spindle carriers when drilling deep holes, for instance, oil channels in camshafts and other shafts. Operating hydraulic cylinder control drive has hydraulic distributors connecting pressure and drain main lines with piston and rod spaces of hydraulic cylinder, rod travel speed control mechanism and feed interruption mechanism including two-position distributor. Piston and rod spaces of hydraulic cylinder are placed in communication with pressure and drain main lines through separate two-position distributors. Hydraulic cylinder rod space control two-position distributor communicates with drain main line through pressure valve. Hydraulic cylinder rod travel speed control mechanism in made in form of two direction valves installed in tandem in hydraulic line coupling piston space of hydraulic cylinder with two-position control distributor of this space of hydraulic cylinder, and three-position distributor installed in parallel with nearest direction valve to piston space along coupling hydraulic line and connected with pressure main line. Feed interruption mechanism is made in form of meter installed in hydraulic line coupling piston space of hydraulic cylinder with drain main line. EFFECT: enlarged operating capabilities of hydraulic drive, simplified control system. 1 dwg