Multi-degree-of-freedom institutional mobile welding robot

The invention provides a multi-degree-of-freedom institutional mobile welding robot, comprising a plurality of parallel mechanism closed-loop actuating mechanism sub-chains, a serial actuating mechanism and a movable platform, wherein mechanism closed-loop sub-chains can control a main chain connecting link to move in a plane on which a four-link mechanism closed-loop sub-chain is positioned; space movement of the movable platform can be achieved through movement of a plurality of parallel connecting link sub-chains, a machine body and the movable platform. According to the multi-degree-of-freedom institutional mobile welding robot, control can be achieved through resultant movement of the four closed-loop sub-chains and the machine body; space movement of a tail-end actuator is achieved through connection of the plurality of connecting links, the machine body and the movable platform; the tail-end actuator is small in movement inertia, good in dynamic performance, and high in reliability; the multi-degree-of-freedom institutional mobile welding robot has the advantages of being compact in structure, simple to control, and capable of moving and operating at the same time; a member bar can be fabricated into a light bar, and the working space of the mechanism is large, so that the multi-degree-of-freedom institutional mobile welding robot can be applied to more occasions.