Rotary transmission device of overloading workpiece

The utility model provides a rotary transmission device of an overloading workpiece, comprising a ring motor which comprises a rotor and stators arranged in a ring mode. The transmission device also comprises a rotating worktable connected with the rotor, a bottom supporting frame connected with the stators, a rotating shaft component and a rotary supporting component, wherein the rotating shaft component is positioned at the axle center of the rotary worktable and is movably connected with one end of the rotating worktable. When the transmission device transmits the overloading workpiece, the rotating worktable takes the rotating shaft component as the center to move following the motion of the rotor of the ring motor, and meanwhile the rotary supporting component moves following with the motion to bear the weight of the overloading workpiece and the rotating worktable. As the ring motor directly generates thrust in working, the rotary transmission device of the overloading workpiece does not need a secondar