WORKING EQUIPMENT OF HYDRAULIC SHOVEL Russian patent published in 1994 - IPC

FIELD: earth-digging machinery. SUBSTANCE: working equipment of hydraulic shovel includes handle 1, boom 2, power cylinder 3 of control handle, supplementary hydraulic cylinder 4 and swinging tie-rod 5. Rod 8 of power cylinder is coupled to handle via swinging tie-rod 5 with capability of fixed movement with reference to handle with the aid of supplementary hydraulic cylinder. Joint 10 of tie-rod is connected to handle. With growth of distance A between joints 6 and 9 effort on teeth of dipper 12 grows. Tie-rod is subjected to extension or compression which leads to increased reliability of operation of working equipment. EFFECT: simplified design and increased reliability of working equipment. 1 dwg