DRAGLINE EXCAVATOR Russian patent published in 2002 - IPC

FIELD: earth-moving machinery. SUBSTANCE: dragline excavator has turntable, boom, lifting and discharge winches with flexible members connected through fairleads and trunnions with walls of bucket, respectively, side ones in lower part, side ones in front part and rear part through bucket arch. Fairleads are arranged at lifting winch on end of boom, and are installed at boom base for traction and discharge winches. Axis of trunnions of lifting flexible members is arranged between center of gravity of empty bucket and axis of symmetry of centers of gravity of empty bucket and bucket loaded to capacity. Distance from center of gravity of empty bucket to axis of trunnions is equal to one third of distance between bucket gravity centers. Arch of bucket is provided cantilever over which discharge flexible member passes. EFFECT: improved efficiency and reliability in operation. 23 cl, 23 dwg