SINGLE-BUCKET HYDRAULIC EXCAVATOR Russian patent published in 1997 - IPC

FIELD: mechanical engineering; cyclic-action earth-moving machines with replaceable working equipment. SUBSTANCE: excavator has base vehicle which carries frame with slewing gear and turnable with operator's cab. Working equipment is mounted on turnable. Working equipment has lever installed coaxially with axis of turning of excavator boom and connected by its free end with boom control hydraulic cylinder whose rod is secured on turnable. Boom turning hydraulic cylinders are coupled with lever and are installed at side of attachment of boom control hydraulic cylinder. Bracket for fastening crane boom lifting-lowering hydraulic cylinder is mounted on excavator boom near its turning axle. Design of working equipment controls provides operation of excavator under concised conditions and, when working equipment is folded into travelling position, high running speeds are provided. EFFECT: simplified design, enlarged operating capabilities. 2 cl, 5 dwg