FIELD: machine building.
SUBSTANCE: group of inventions relates to machines for soil development, such as excavators. Crown adapter to attach crown to working tool using retainer comprises body. Adapter body comprises a front portion configured to facilitate attachment of the crown, a first arm, which has side surface, second arm, which has lateral surface, connecting part, which connects arms and front part together. At that, at least one arm defines a slot, which is made with the possibility of holding the retainer. Housing defines a pocket that defines a thrust surface, is located on the side surface of the shoulder and has a height (H), width (W) and depth (D), wherein pocket is equipped with groove facing in direction of installation. First and second arms and the connecting part define a recess which has a closed end and an open end. Recess determines direction of installation on working tool. Note here that thrust surface faces installation direction and minimum distance measured from thrust surface to connection part, measured in direction of installation, is less than minimum distance from slot to connecting part, measured in direction of installation.
EFFECT: technical result is reduction of voltage on adapter arms.
6 cl, 18 dwg
