Patent ID: 9660506
Date: 2017-05-23
CPC Classifications: H02K

Claim:
1. An electric motor comprising: a rotor shaft; a housing having a motor chamber which is an inner space; and a rotor and a stator which are disposed at a center in an axial direction of the motor chamber and separate the motor chamber into one side and the other side in the axial direction, wherein a lower portion of the housing forms a storage tank that stores lubricating oil and cools a coil end of the stator, the storage tank and a stator core of the stator which is disposed at a center in an axial direction of the storage tank together form a first storage tank that stores the lubricating oil on one side in the axial direction with respect to the stator core and a second storage tank that stores the lubricating oil on the other side in the axial direction with respect to the stator core, a communication passage is provided in the housing to communicate the first storage tank with the second storage tank, the communication passage, as seen in the axial direction, extends above an oil level of the lubricating oil stored in the first storage tank and the second storage tank such that the communication passage provides an air flow between an upper portion of the first storage tank and an upper portion of the second storage tank, and the communication passage is entirely disposed below the rotor shaft in a height direction of the electric motor.