EARTHMOVER HYDRAULIC DRIVE Russian patent published in 2023 - IPC E02F9/22 

FIELD: earthworks.

SUBSTANCE: earthmover hydraulic drive is claimed. The earthmover hydraulic drive contains a hydraulic pump kinematically connected via a controllable coupling to a drive engine. It also contains a hydraulic cylinder for control of the coupling, in a piston cavity of which an elastic element is installed. A rod cavity of a piston communicates via a hydraulic line with a hydraulic distributor communicating via hydraulic lines with a hydraulic pump, a hydraulic tank, and with an actuator. The hydraulic drive is equipped with a hydraulic battery, an adjustable reduction hydraulic valve, and an adjustable hydraulic throttle. The hydraulic battery communicates, via one hydraulic line, through sequentially included reduction hydraulic valve and check hydraulic valve, with a cavity of lifting of the actuator and, via the second hydraulic line, communicates with the hydraulic distributor made with the possibility of connection in a neutral position of a spool. The hydraulic battery, through the adjustable hydraulic throttle, is connected to the rod cavity of the hydraulic cylinder of the coupling control drive. The hydraulic cylinder is equipped with a mechanism for adjustment of an elastic force of the elastic element in its piston cavity.

EFFECT: reduction in energy consumption by a hydraulic pump drive due to its reliable disconnection from a drive engine during the whole time of a hydraulic distributor spool being in a neutral position, increase in the reliability and durability of a coupling due to reduction in time of sliding of discs, when it is turned on.

1 cl, 1 dwg