HYDRAULIC DRIVE FOR SINGLE-BUCKET EXCAVATOR Russian patent published in 2007 - IPC E02F9/22 

FIELD: construction and mining, particularly cyclic machine drives.

SUBSTANCE: hydraulic drive comprises pump, hydraulic monitor controlled by means of following slide. Above components are brought into rotation by power engine with flywheel. Hydraulic drive also has hydraulic cylinders for executive tools including hydraulic cylinder for working equipment, check valves installed between pressure and drainage pipelines of hydraulic cylinders for executive tools, distribution means including three-position distributor and three-position distributor control unit, as well as tank. Hydraulic drive is provided with two two-position slides. Control cavity of one two-position slide is connected to piston cavity of hydraulic cylinder. Control cavity of another two-position slide is communicated with control cavity of distributor. Inlet of the first two-position slide is connected with control unit, outlet thereof is linked to control cavity of distributor. Another outlet of the first two-position slide is connected to inlet of the second two-position slide having the first outlet linked to tank and the second outlet communicated with control cavity of following slide.

EFFECT: increased economical efficiency of the drive due to pumpback of lifted working equipment potential energy into the drive.

2 cl, 1 dwg