Rotor structure for improving heat dissipation performance of outer rotor brushless motor and motor

The invention provides a rotor structure for improving the heat dissipation performance of an outer rotor brushless motor, and the rotor structure comprises a housing and a magnetic layer, the magnetic layer is composed of a magnetic ring or a magnetic strip, the magnetic layer is provided with a plurality of magnetic poles including N poles and S poles, the N poles and the S poles are sequentially distributed in a staggered manner, the magnetic layer is provided with a magnetic layer groove, and the magnetic layer groove is formed in the housing. A notch of the magnetic layer groove is located in the center of the magnetic pole, so that the change of a magnetic field is minimum, and a shell groove corresponding to the magnetic layer groove is formed in the shell. According to the invention, obvious heat dissipation air can be generated when the (outer) rotor of the motor rotates, heat generated in the motor is continuously and quickly taken away, the effect of optimizing the heat dissipation performance of t