FIELD: machine building.
SUBSTANCE: invention relates to construction and road machines and can be used on machines with caterpillar running equipment, in particular, on bulldozers. Hydraulic drive of bulldozer comprises hydraulic cylinder of dump, standard hydraulic distributor connected by hydraulic lines with hydraulic pump and hydraulic tank, additional two-position hydraulic distributor, connected in series with standard hydraulic distributor and having hydraulic control chamber, load sensors of carriages of caterpillar chassis equipment. Hydraulic drive is equipped with second additional two-position hydraulic distributor, OR hydraulic valve and controlled hydro-throttle. Second additional hydraulic distributor is connected in parallel to the standard one and its control chamber is interconnected by the hydraulic line with the control chamber of the first additional hydraulic distributor and through the adjustable hydroelectric power plant with the middle branch of the OR hydraulic valve, the side outlets of which are interconnected with load sensors of the carriages.
EFFECT: technical result is improved coupling properties of propulsors, which increase efficiency and traction capabilities of the bulldozer, ensuring maintenance of optimum ground pressure plot on caterpillar bearing surface.
1 cl, 1 dwg
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RU2719295C1 |
