Mechanism capable of achieving power-off welding

The utility model relates to a mechanism capable of achieving power-off welding, and belongs to the technical field of welding. Comprising a base, a main shaft, an eccentric hammer, a heat insulation plate, a pressing plate, a soldering iron bayonet, an electric appliance box, an insulation pad and a clamp spring. The main shaft is of a cylinder structure, transversely penetrates through the upper cavity of the base and extends out of the two ends, and the pressing plate and the heat insulation plate are connected to the main shaft through screws; the eccentric hammers are of cylinder structures, are directionally matched with the main shaft through notch circles and are mounted at the two ends of the main shaft; the base, the eccentric hammer and the electric appliance box are respectively fixed by the clamp spring; the pressing plate is of an L-shaped cuboid structure, one side of the pressing plate is of a thin-wall structure and provided with a via hole used for installing the heat insulation plate, the o