EARTHMOVING WORKING MEMBER WITH CROWN AND ADAPTER TOOTH ASSEMBLY Russian patent published in 2016 - IPC E02F9/28 

FIELD: machine building.

SUBSTANCE: invention relates to tooth assembly excavating bits. Tooth assembly earthmoving bit comprises rear end, top outer surface, lower outer surface, side outer surfaces located opposed to each other, inner surface and extending outward projecting elements on each of side outer surfaces. At that, upper outer surface and bottom outer surface extend forward from rear end and converge in front, to make front edge. Side outer surfaces pass downward from the upper outer surface to bottom outer surface and made narrowing. At that, distance between side outer surfaces decreases according to their passing downwards from the upper outer surface to bottom surface, and distance at uppermost part of side outer surfaces is more, than at lowest part of the side external surfaces. Inner surface enters inside excavation bit from excavation bit rear end and forms inner cavity of the excavation bit, shape of which corresponds to adapter head shape, which is inserted inside said inner cavity.

EFFECT: improved tooth assembly structures.

8 cl, 75 dwg