Patent ID: 11894750
Assignee: LG MAGNA E-POWERTRAIN CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A motor comprising:
a motor housing;
a stator provided inside the motor housing and having a coil;
a rotor provided with a rotor core and a plurality of end plates mounted on both ends of the rotor core, respectively, the rotor mounted inside the stator to be rotatable centering on a rotary shaft; and
a plurality of end covers mounted to cover both end portions of the motor housing,
wherein each of the plurality of end plates comprises:
a rib extending in a ring shape from an outer circumferential surface;
a plurality of spray holes formed through a circumferential surface of the rib in a radial direction to spray a cooling fluid inside the motor housing onto the coil in response to rotation of the rotor; and
a cooling fluid accommodating portion disposed at an inner side of the rib in the radial direction to communicate with the spray holes, the cooling fluid accommodating portion formed concavely in a thickness direction of the end plate and opened toward the end cover, and

wherein an axial protrusion length of the rib protruding in an axial direction from the outer circumferential surface of the end plate is shorter than an axial thickness of the end plate.