Permanent synchronous tractor

The utility model discloses a permanent synchronous tractor, including frame, stator module, with stator module matched with rotor subassembly, driving sheave and shafting subassembly, the frame including be located the bottom the bottom plate, be located the curb plate and the connection of bottom plate both sides the backup pad of curb plate, the backup pad is provided with the pipeline, the shafting subassembly includes the axis of rotation, the axis of rotation runs through the setting and is in in the pipeline, the one end of axis of rotation is connected with the rotor subassembly, the other end is connected with the driving sheave. The utility model discloses a structural design of hauler is reasonable, can be applicable to welding frame and foundry goods frame simultaneously, hauler frame shape is simple, periphery and die cavity that no shape is complicated, the convenient measurement, hauler frame structural design stress point is nearer with the strong point, and inside shafting and rotor structura