Patent ID: 8803377
Filing Date: 2014-08-12
Classification: B25F,H02K

Abstract:
1. A motor assembly comprising: a motor comprising a stator, a rotor installed inside the stator, and an airflow passage formed inside the motor, the airflow passage having two axial ends both being open to communicate with outside of the motor; a heat dissipation device disposed on a radially outer surface of the stator for absorbing heat from the stator, a fan attached to the rotor and located outside of the motor adjacent to one axial open end of the motor for generating an airflow to pass through the airflow passage inside the motor; and a guiding member arranged at one end of the motor and configured to guide the airflow generated by the fan to the heat dissipation device on the radially outer surface of the stator, wherein the airflow generated by the fan enters into the airflow passage inside the motor from outside of the motor via the other one axial open end of the motor away from the fan and exits the airflow passage via the one axial open end of the motor adjacent the fan, the airflow reaches the fan located outside of the motor after exiting the airflow passage inside the motor and is then guided to the heat dissipation device by the guiding member.