WORKING EQUIPMENT OF THE MOTOR GRADER Russian patent published in 2021 - IPC E02F3/76 E02F3/84 E02F9/22 

FIELD: earthmoving machines.

SUBSTANCE: invention relates to earthmoving and transport machines, in particular to motor graders. The working equipment of the grader includes a breast and side sections installed symmetrically behind the breast with the possibility of rotation by drives in the form of hydraulic cylinders. The working equipment is additionally equipped with movable brackets, guides of the side sections, four-position hydraulic valves, a hydraulic accumulator and an adjustable reduction hydraulic valve. The outer ends of the side sections are installed in the guides, and the inner ends are attached pivotally to movable brackets made with the possibility of moving along the breast and fixing. The hydraulic cylinders of the drive of the side sections are connected to four-position hydraulic valves connected to the pressure and drain hydraulic lines and to the hydraulic accumulator, which is connected to the pressure hydraulic line through an adjustable reduction hydraulic valve, made with the possibility of maintaining the pressure of the working fluid in the hydraulic accumulator, providing partial balancing of the gravity of the side sections in one of the positions of the hydraulic valve spool.

EFFECT: increase in productivity.

1 cl, 3 dwg