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

FIELD: machine building.

SUBSTANCE: invention relates to construction and road machines, namely to excavating-transporting machines of bulldozer type. Working bulldozer equipment includes pushers, blade with knife and hydraulic drive, braces, movable bottom with hydraulic drive and side jaws. Working equipment is additionally equipped with a hydraulic accumulator, a reduction hydraulic valve and an adjustable hydraulic throttle. Movable bottom is rigidly fixed to side jaws hingedly connected to the rods of the hydraulic cylinders of the drive and to the lower ends of the pendulum arms connected also by their top ends to the blade. Dump hydraulic cylinders hydraulic distributor is made four-position and communicated with hydraulic accumulator, which is communicated via pressure reduction valve with pressure hydraulic line, and hydraulic cylinders of movable bottom drive are communicated by rod cavities through controlled hydraulic turbine with hydraulic accumulator and piston cavities with hydraulic control valve of hydraulic cylinders of blade lifting. Reduction hydraulic valve is configured to maintain the value of charging of hydraulic accumulator, providing partial balancing of gravity of working equipment in floating position in one of positions of slide valve of hydraulic distributor.

EFFECT: increased reliability and facilitation of bulldozer equipment working process control.

1 cl, 2 dwg