FIELD: digging works.
SUBSTANCE: group of inventions relates to digging machines with wear elements such as teeth or nodes. A fastener serves to fasten a wear element on the leading edge of a support, wherein the wear element has two arms passing backwards opposite each other, leaving a space between them for placing the leading edge, thereby determining the assembled state. The arms have the first through holes facing each other, and the support has the second through hole located between the first through holes in the assembled state. In the assembled state, the first and second through holes determine the assembly axis. The fastener contains the C-shaped first case, a wedge and the second case, while in the assembled state, the first case, the wedge and the second case are placed in the mentioned holes. The wedge is located between the first case and the second case, and in the assembled state there is a hollow space between the wedge and the second case adapted to accommodate a screw rod, wherein the hollow space determines the rod axis coinciding with the axis of the rod. The fastener additionally contains a ratchet device located between the wedge and the first case, a threaded surface that moves together with the second case, the axis of which coincides with the rod axis, a support surface on the wedge, wherein the support surface is located next to the rod axis and is oriented upwards, and there is free access to the support surface from above in the direction of the rod axis. In this case, the ratchet device provides the possibility of relative movement of the wedge and the first case along the assembly axis in the downward direction and provides the possibility of blocking the relative movement of the wedge and the first case along the assembly axis in the upward direction.
EFFECT: increase in the quality and service life of the fastener, reducing the risk of disconnection due to breakage.
17 cl, 18 dwg
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