HYDRAULIC DRIVE OF SELF-MOVING JIB CRANE Russian patent published in 1997 - IPC

FIELD: hydraulic drives of jib cranes and other hoisting apparatuses. SUBSTANCE: the hydraulic drive uses the main pumps connected through hydraulic slide control valves with a hydraulic control system to hydraulic motors and hydraulic cylinders of the crane mechanisms, an auxiliary pump connected through a check valve to the valve unit with a hydraulic accumulator, and further to control units, an emergency valve with a hand drive, hydraulic valves, filter and hydraulic lines. The pressure hydraulic line of the emergency hydraulic pump is connected through a check valve and valve is connected to the pressure hydraulic line of the auxiliary pump in the section between the check valve and the valve unit with the hydraulic accumulator. EFFECT: enhanced reliability. 1 dwg