TOOTH AND ADAPTER TO ATTACH THE TOOTH TO THE WORKING MACHINE Russian patent published in 2018 - IPC E02F9/28 

FIELD: machine building.

SUBSTANCE: present invention relates to wearing parts of working bodies of working machine buckets. Bucket teeth tine has a cavity for receiving a portion of the adapter that extends between the first and second opposed outer working surfaces from the open end at the attachment end of the tooth to the lower end. Moreover, the cavity is bounded by an inner wall which comprises first and second internally facing inner walls, which are internal surfaces, respectively, with said first outer working surface and said second outer working surface, and opposite side walls connecting between said first and second inner walls. In doing so, the cavity defines a back part (BP) extending along the Y axis and at least partially located between the plane defined by the X and Z axes and the open end of the cavity, the front part (FP) extending along the Y axis and located between the plane defined by the X and Z axes and the lower end of the cavity, and a stepped part (SP) connecting between the back part and the front part. In the back part, both the first and the second inner wall have a pair of substantially flat rear contact surfaces separated from each other by a rear separation region extending beyond said pair of first contact surfaces. Present invention also relates to an adapter.

EFFECT: increase wear resistance, strength and reliability.

30 cl, 41 dwg