Rotor of outer rotor tractor

The invention relates to the technical field of gear-free permanent magnet synchronous outer rotor tractors for elevators. The rotor of an outer rotor tractor comprises a rotor cylinder, permanent magnets and a rotor core. The rotor is characterized in that the rotor cylinder is cylindrically shaped by using cast iron; the rotor core is formed by a quartered sector-shaped silicon steel stamped sheet in an overlying manner; the rotor core is arranged inside the rotor cylinder; a plurality of square holes are formed in the rotor core along the circumference; the permanent magnets are embedded into the square holes; and the outer edges of the inner sides of the permanent magnets are arc-shaped. The rotor is reasonable in design, simple in structure, easy to manufacture and low in cost, the magnet is reliable in installation performance, and the electric performance of the tractor is improved.