FIELD: machine building.
SUBSTANCE: group of inventions refers to digging organs. Earth-moving tool system contains an excavation tip and a clutch attached to the digging tip. Ground engaging tip comprising a ground engaging portion and a coupling portion, the coupling portion including an inner surface comprising a coupler pocket with an opening connected to the inner cavity. Inner surface has a bottom wall, a first coupler face wall and a second coupler face wall. First connecting face wall is spaced from the second connecting face wall. In this case, the first connecting face wall and the second connecting face wall extend along the longitudinal axis from the bottom wall to the opening of the connection pocket. First coupler face wall and the second coupler face wall include a distal flat portion, respectively adjacent to the bottom wall. First coupler face wall and the second coupler face wall include first convex part, respectively adjacent to the distal flat part, concave part, respectively, adjacent to the first convex part, and a second convex portion respectively adjacent to the first concave portion in such a way that concave portion is disposed between the first convex portion and the second convex portion. Moreover, the first convex part has the first radius of convex curvature, the second convex part has a second radius of convex curvature. First radius of convex curvature is greater than the second radius of convex curvature. Coupling has a fastening bow that is located inside the connection pocket. Fixing nose includes a first outer face with a first face contour and a second outer face with a second face contour. Fastening nose is located within the coupler pocket such that the first outer face is adjacent to the first coupler face of the coupler pocket and the second outer face is adjacent to the second coupler face of the coupler pocket. In this case, the contour of the first wall of the coupler pocket is not connected to the first face contour of the fixing bow, and the contour of the second wall of the coupler pocket is not connected to the second face contour of the fastening bow.
EFFECT: decrease in stress concentration on the digging tip.
8 cl, 34 dwg
