FIELD: machine building.
SUBSTANCE: actuator includes hydraulic mounts installed on cargo platform, spool valves made in the form of three-position four-way distribution valves, pumps and tank. Number of the above distribution valves and number of pumps is equal to the number of hydraulic mounts. One outlet hole of each three-position four-way distribution valve is closed with a plug; the other outlet hole is interconnected with piston cavity of one of the hydraulic mounts, and its inlet hole is interconnected with one of the pumps and when distribution valve is in initial position, it is interconnected with its drain hole. The first outlet hole of additional spool valve is interconnected through the first non-return valve with bypass valve, and the second outlet hole is interconnected with stock cavities of hydraulic mounts. Stock cavities of hydraulic mounts are interconnected with bypass valve through the second non-return valve. Pumps and tank is interconnected via main lines to inlet hole of additional spool vale and to drain holes respectively of all the above distribution valves. Additional non-return valves are installed into main lines connecting the pumps to inlet hole of additional spool valve.
EFFECT: higher reliability of actuator at performance of operations; reduction of power costs at performance of platform lowering operation and shortening of the actuator operating period at performance of its lifting and levelling operations.
1 dwg
