GRAPPLE WORKING EQUIPMENT OF EARTH-MOVING MACHINE Russian patent published in 2025 - IPC E02F3/413 E02F3/43 

FIELD: machine building.

SUBSTANCE: invention relates to excavating machines, specifically to working equipment with a grab working element and can be used for development of strong soils and coatings. Clamshell working equipment of the earthmoving machine contains the main handle with the traverse pivotally connected to the bucket jaws, which are pivotally connected to the hydraulic cylinders rods, hingedly connected by the housings to the main handle, a movable section of the handle with a hydraulic cylinder of a drive, a hydraulic accumulator, an adjustable pressure reducing valve and a pressure gauge. Crossbar is rigidly attached to the movable section of the handle, which is made with possibility of linear movement along the main handle by means of the drive hydraulic cylinder connected by the rod cavity with the jaw drive hydraulic cylinders piston cavities, piston chamber is communicated with hydraulic accumulator communicated with pressure gauge via valve and communicated via valve with hydraulic pump.

EFFECT: higher efficiency and expanded operating performances when developing soils with different strength properties.

1 cl, 1 dwg