| 摘要 |
FIELD: load handling equipment. ^ SUBSTANCE: proposed hydraulic drive for jacking up and horizontal leveling of load platform has hydraulic supports installed on platform, reciprocating meter, reversible distributor, first outlet hole of distributor being connected with reciprocating meter, and second, with rod spaces of hydraulic supports. Drive is furnished also with controllable check valves whose overvalve spaces communicate with hydraulic supports, and additional distributor communicating with piston and rod spaces of controllable check valves, bypass valve communicating through main line with rod spaces of controllable check valves, supply source and tank. Moreover, drive is furnished with four-line pilot-controlled check valve whose overvalve space communicated with reciprocating meter, undervalve space, with first outlet hole of reversible distributor, rod space, with tank, and control chamber, with rod spaces of controllable check valves. ^ EFFECT: reduced consumption of power. ^ 2 cl, 1 dwg |
