Motor

A motor comprising:

• a casing;
• a stator fixed to an inner circumferential surface of the casing;
• and
• a rotor assembly coupled to the stator with a predetermined air gap defined between the rotor assembly and the stator, the rotor assembly being configured to be rotatable relative to the stator based on a magnetic interaction between the rotor assembly and the stator,
• wherein the rotor assembly comprises:
• a rotatable shaft;
• a rotor core coupled to the rotatable shaft, the rotor core including a plurality of holes penetrating through the rotor core in an axial direction;
• a first end ring coupled to one end of the rotor core, the first end ring being configured to guide oil supplied to the rotor assembly to the plurality of holes;
• and
• a second end ring coupled to the opposite end of the rotor core, the second end ring being configured to guide the oil passing through the plurality of holes in a radial direction,
• wherein the casing comprises:
• a main housing accommodating the stator and the rotor assembly;
• a first cover covering one end of the main housing and supporting one side of the rotor assembly;
• and
• a second cover covering the opposite end of the main housing and supporting the opposite side of the rotor assembly, and
• an oil inlet defined through the main housing in a position overlapping the rotor assembly in a gravity direction and configured to guide the oil passing through the oil inlet and dropping onto the rotor assembly, and
• wherein the stator comprises:
• a stator core coupled to an inner circumferential surface of the main housing;
• and
• a coil portion wound around the stator core and including first and second end turns respectively protruding from a first surface and a second, opposite surface of the stator core, and
• the first end ring comprises a first scattering portion configured to scatter oil supplied to a surface of the first end ring opposite to one surface of the first end ring facing the rotor assembly, in the radial direction, and
• the first scattering portion overlaps the first end turn in the radial direction of the rotating shaft.