FAN, MOTOR AND BEARING STRUCTURE THEREOF

摘要

A fan includes an impeller and a motor. The motor includes a rotor structure and a bearing structure. The motor is used to drive the impeller and the rotor structure has a shaft. The shaft is connected to the impeller. The bearing structure includes an oil-retaining bearing, a base and a sleeve. The oil-retaining bearing is used to dispose the shaft and the base is used to support the oil-retaining bearing. The sleeve includes at least one resisting part and a circular sidewall. The circular sidewall is covered the outside of the oil-retaining bearing. The resisting part is disposed on the top surface of the circular sidewall and extended to the center of the oil-retaining bearing.