ENERGY-SAVING DEVICE Russian patent published in 2020 - IPC E02F9/22 

FIELD: construction; machine building.

SUBSTANCE: invention relates to jib construction and road machines, such as single-bucket excavators and front loaders. Energy-saving device includes boom, boom drive hydraulic cylinders, balancing pneumatic cylinder communicated with gas cylinder, charging pneumatic cylinder, manometer, pneumatic distributor, air filters, safety and return pneumatic valves. At that, the charging pneumatic cylinder is made in the form of a casing located in a hollow rod of a balancing pneumatic cylinder, and installed inside the plunger, and its cavity is interconnected with the first outlet of the pneumatic distributor and through the first return pneumatic valve with the second tap. Third outlet of pneumatic distributor is communicated via second return pneumatic valve with gas cylinder, which is communicated via pneumatic lines with safety pneumatic valve, pressure gauge, with piston cavity of balancing pneumatic cylinder and with control chamber of pneumatic valve, communicated by fourth branch via air filter with environment.

EFFECT: technical result is higher reliability and reduced power consumption.

1 cl, 2 dwg