WORKING EQUIPMENT OF BULLDOZER Russian patent published in 2020 - IPC E02F3/76 E02F9/20 

FIELD: machine building.

SUBSTANCE: invention relates to construction and road machines, in particular to excavating transport, such as bulldozers. Working equipment of bulldozer consists of pushers, blade with blade and hydraulic lift drive, braces and gate connected with blade. Working equipment is equipped with hydraulic cylinders of flap drive, hydraulic accumulator, reduction hydraulic valve and adjustable hydro-throttle. Shutter is equipped with side walls and is articulated with blade and with rods of hydraulic cylinders, hingedly attached to blade. Hydraulic distributor of blade lifting hydraulic cylinders is made four-position and is interconnected with hydraulic accumulator, which is connected through pressure reducing hydraulic valve with pressure hydraulic line and through controlled hydraulic throttle with rod cavities of hydraulic cylinders of gate drive, piston cavities of which are connected to waste control hydraulic distributor. Reduction hydraulic valve is made with possibility to maintain value of charging pressure of hydraulic accumulator providing partial balancing of gravity of working equipment, in floating position, in one of positions of hydraulic distributor slide valve.

EFFECT: higher efficiency and reliability.

1 cl, 2 dwg