BULLDOZER EQUIPMENT Russian patent published in 2021 - IPC E02F3/76 E02F9/22 

FIELD: construction and road vehicles.

SUBSTANCE: invention relates to construction and road vehicles, for example, bulldozers. Bulldozer equipment includes pushing bars, a blade with a knife and a lifting hydraulic drive, braces and a flap connected to the blade, hydraulic cylinders of a flap drive, a hydraulic accumulator and a reduction hydraulic valve. The flap is equipped with sidewalls having guides made with the possibility of rotary-progressive movement of the flap relatively to rollers mounted on sidewalls of the blade, and is pivotally connected to hydraulic cylinder cases pivotally attached by rods to the blade. A hydraulic distributor of lifting hydraulic cylinders of the blade is made four-band and is connected to the hydraulic accumulator connected via the reduction hydraulic valve to a pressure hydraulic line, as well as to piston cavities of hydraulic cylinders of the flap drive, rod cavities of which are connected to the hydraulic distributor of lifting hydraulic cylinders of the blade. The reduction hydraulic valve is made with the possibility to maintain the charging pressure of the hydraulic accumulator, which provides partial balancing of the gravity of working equipment in its floating position in one of positions of a hydraulic distributor spool.

EFFECT: increase in productivity due to increasing the volume of the drawing prism and reducing soil losses during transportation by installing the rotary-progressive flap; the energy consumption for moving the soil is reduced.

3 cl, 4 dwg