Motor

A motor comprising:

• a rotor to rotate about a motor axis;
• and
• a stator radially outside of the rotor;
• wherein
• the rotor includes:
• a shaft extending along the motor axis, and including a collar portion and a screw portion located along an axial direction on an outer circumferential surface thereof;
• a rotor core surrounding the shaft from radially outside;
• a rotor magnet fixed to the rotor core;
• a pair of plate-shaped end plates on both axial sides of the rotor core;
• and
• a nut screwed onto the screw portion;
• the rotor core and the pair of end plates are held between the collar portion and the nut;
• each of the end plates includes a first surface opposite to an axial end surface of the rotor core, and a second surface facing away from the first surface;
• the first surface includes a slanting surface that slants toward the rotor core as the slanting surface extends radially outward;
• and
• the slanting surface is in contact with the axial end surface of the rotor core.

The motor according to 6, wherein

• the shaft includes a hollow portion including an inner circumferential surface extending along the axial direction, and communicating holes each extending in a radial direction to bring a space outside of the shaft and the hollow portion into communication with each other, the hollow portion being structured to allow oil to be fed thereinto;
• each end plate includes a plate through hole radially inward of the slanting surface and extending in the axial direction, and a first recessed portion in the first surface and extending radially inward from the plate through hole;
• the first recessed portion is connected to a corresponding one of the communicating holes at a radially inner end thereof;
• the rotor core covers an opening of the first recessed portion;
• the rotor core includes a core through hole extending therethrough along the axial direction;
• the core through hole connects the first recessed portions of the pair of end plates to each other;
• and
• at least a portion of an opening of the core through hole is radially outward of the plate through hole.