| 主权项 |
1. A motor cooling system for cooling a motor unit including a stator assembly and a rotor assembly configured to rotate a rotor shaft, the motor cooling system comprising:
a stator casing including a generally cylindrical stator casing body having a longitudinal axis, the stator casing body including:
a stator casing wall extending between a first end and a second end of the stator casing body, the stator casing wall including an interior surface and an exterior surface, the interior surface of the stator casing wall defining an internal cavity in the stator casing, the internal cavity configured to receive the motor unit; anda rib on the exterior surface of the stator casing wall extending along the exterior surface of the stator casing wall, a groove defined between adjacent portions of the rib; an arm casing including a generally cylindrical arm casing body, the arm casing body including:
an arm casing wall extending between a first end and a second end of the arm casing body, the arm casing body defining an arm casing cavity in the arm casing body, the arm casing cavity configured to receive the stator casing therein;an end wall adjacent the second end of the arm casing body and radially extending inward from the arm casing wall toward the longitudinal axis; anda port located in the arm casing wall, the port being in fluid communication with the groove. |
