FRONT-END EQUIPMENT OF SINGLE-BUCKET EXCAVATOR Russian patent published in 1994 - IPC

FIELD: earth-moving equipment. SUBSTANCE: front-end equipment comprises box-shaped dipper-stick 1 articulated with boom 7, bucket 8 and hydraulic cylinders 9 and 10 for turning dipper-stick 1 and bucket 8. Dipper-stick 1 comprises four surfaces and open ends 2. Hydraulic skewing cylinders 13 are installed in the plane of dipper-stick 1 and are arranged on diagonals of the boxed structure. Cross-section of dipper-stick 1 expands towards boom 7 and hydraulic skewing cylinders 13 of dipper-stick 1 are accommodated only in the wider part of said stick while central part of dipper-stick cavity accommodates diaphragm 14. Articulated joints 3 connecting dipper-stick 1 with boom 7 are disposed mainly in end portion of dipper-stick while articulated joint 5 connecting said stick with its turning cylinder 9, is located in its central part. Hydraulic cylinders 13 skew the box-shaped structure of stick thus orienting its deformation at the ends in opposite directions. Therefore, axes of articulated joints 3, 5 which connect dipper-stick 1 with boom 7 and bucket 8 with dipper-stick 1, respectively, are turned from each other. EFFECT: wider functional capabilities of excavator. 4 cl, 4 dwg