FRONT-END EQUIPMENT OF SINGLE-BUCKET HYDRAULIC EXCAVATOR Russian patent published in 2002 - IPC

FIELD: earth-moving facilities. SUBSTANCE: proposed front end equipment of single-bucket hydraulic excavator has dipper stick and bucket hinge-coupled with dipper stick, bucket turning mechanism which has control hydraulic cylinder, insert and hinge device. Insert has stationary part with hydraulic cylinder fitted on, turnable column and screw pair with non-self-braking thread consisting of screw and nut. Screw is connected with rod of stationary part hydraulic cylinder, and nut is connected with turnable column. Hinge device is made in form of hydraulic cylinder and two tie-rods some ends of which are hinge-coupled with rod of hinge device hydraulic cylinder, and other end of one tie-rod is hinge-coupled with turnable column, and that of other tie-rod is hinge-coupled with bucket. Housing of hinge device hydraulic cylinder is connected with turnable column and bucket by means of hinge joints. Tie-rods are made in form of hydraulic cylinders. EFFECT: simplified design, enlarged operating capabilities. 2 cl, 5 dwg