HYDRAULIC DRIVE OF SINGLE-BUCKET EXCAVATOR

FIELD: construction engineering; mining industry. ^ SUBSTANCE: invention relates to drives of cyclic-action machines. Proposed drive of single-bucket excavator includes power motor, pump, hydraulic motor controlled according to "p=const" law, hydraulic motors of operating mechanisms or valves installed between pressure and drain main lines of hydraulic motors of operating mechanisms, distributing equipment and tank. Hydraulic drive is furnished with pump-motor with volume regulator, hydraulic accumulator, centrifugal operation mode selector of pump-motor. Shafts of pump, hydraulic motor and pump-motor are mechanically coupled with shaft of power motor and centrifugal operation mode selector of pump-motor. Hydraulic accumulator is connected with pressure space of pump-motor, and control spaces of volume regulator are connected with control pressure main line through centrifugal selector. ^ EFFECT: improved reliability, increased economy of hydraulic drive. ^ 1 dwg