Motor

The embodiment of the invention provides a motor. The motor comprises a rotor assembly, an end cover, a heat dissipation cavity and a bearing, the rotor assembly is provided with an air guide channel, and the air guide channel extends in the axial direction of the rotor assembly. The end cover is arranged at the end of the air guide channel and provided with a bearing chamber. The heat dissipation cavity is formed in the peripheral side of the bearing chamber, and the air guide channel communicates with the outside through the heat dissipation cavity; the bearing is arranged in the bearing chamber, and heat of the bearing can be transmitted into the heat dissipation cavity. According to the motor provided by the embodiment of the invention, external airflow can circulate the air guide channel and the heat dissipation cavity and can take away heat transmitted from the bearing in the heat dissipation cavity, heat generated in the operation process of the bearing can be continuously transmitted to the heat dissi