DIPPER STICK OF HYDRAULIC EXCAVATOR Russian patent published in 1994 - IPC

FIELD: excavating and loading machines. SUBSTANCE: dipper stick has longitudinal box-type girder of sheet U-shaped frame and sheet strip, five bushing sockets for connection of dipper stick with tie-rods of dipper stick and dipper. Dipper stick base is made of additional U-shaped frame. Upper flange of base frame is located at acute angle to upper flange of girder frame. Vertical sides of base frame have expansions exceeding those of beam frame sides in its front part. Third, fourth and fifth sockets for boom, dipper stick hydraulic cylinder and dipper hydraulic cylinder are passed through sides of base frame. Fourth socket is located under bent part of girder lower strip. Longitudinal axis of fourth socket is located in plane square to upper flange of girder frame. EFFECT: higher efficiency. 3 cl, 8 dwg