Fusion welding device

A fusion welding device, comprising a fusion welding work motor, a fusion welding work moving assembly, and a fusion welding work fixed assembly, the fusion welding work motor being connected with the fusion welding work moving assembly by means of a transmission mechanism;

• the fusion welding device is provided with a central connection component that is able to rotate, and the central connection component is provided with a first input component, a second input component, and a locking structure connection component;
• the first input component is transmissively connected to a clutch of the fusion welding work motor, and the fusion welding work motor is able to drive, by means of a first output component, the first input component to produce a rotation in a second direction, and thereby drive the central connection component to rotate in the second direction, and after rotating to a set angle, the first input component and the first output component disengage, said set angle corresponding to an angle of rotation required for the fusion welding work moving assembly to move to a fusion welding working location,
• the second input component, on the basis of driving of the motor, produces a rotation in a first direction, to cause the central connection component to produce rotation in the first direction and cause the first input component to be connected to the first output component.