HYDRAULIC DRIVE OF THE BACKHOE WORKING EQUIPMENT Russian patent published in 2018 - IPC E02F9/22 

FIELD: construction.

SUBSTANCE: hydraulic drive of the backhoe working equipment contains a hydraulic tank, first and second fixed delivery pumps, connected by the first and second pressure hydraulic circuits with the relevant groups of the slave hydraulic cylinders of the working equipment with the ability to manage through the first, second and third hydraulic distribution valves installed consistently and with general flow channel, communicated with the hydraulic tank. In the first pressure hydraulic circuit, between the first and the second and the third hydraulic distribution valves, a back-flow valve, a pressure relay and an electro-driven hydraulic distribution valve are installed. An electric-driven hydraulic distribution valve is installed between the first hydraulic distribution valve and the back-flow valve, and the pressure relay is between the back-flow valve and the second hydraulic distribution valve. At the same time, the pumps productivity is determined by the necessary speed of movement of the actuating hydraulic cylinders of the respective working bodies.

EFFECT: increased efficiency of the hydraulic drive of the backhoe working equipment.

2 cl, 1 dwg