Motor
AssigneeLG Magna E-Powertrain Co., Ltd.
InventorsJongsu Kim, Jungwook Moon, Changhum Jo, Minjung Kim, Taehee Kwak
Life of this patent
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Abstract
The present invention relates to a motor comprising: a motor housing; a stator which is provided in the motor housing and has a coil; a rotor installed in the stator to be rotatable about a rotary shaft; and a spray hole which is formed in the circumferential surface of the rotor by passing through the circumferential surface in a radial direction and which sprays a cooling fluid in the motor housing onto the coil according to the rotation of the rotor. Therefore, cooling by oil convection can be accelerated while minimizing resistance due to the oil.
Claims12
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.
Dependencies are inferred from the claim text.