Rotor, rotary electric machine, and drive device

A rotor provided in a motor, the rotor comprising:

• a shaft extending in an axial direction about a central axis;
• a rotor core including a plurality of core pieces disposed side by side in the axial direction and fixed to an outer peripheral surface of the shaft;
• and
• a plate made of a non-magnetic metal material disposed between the core pieces adjacent to each other in the axial direction and surrounding the shaft,
• the shaft including;
• a first shaft hole extending in the axial direction;
• and
• a second shaft hole extending radially outward from the first shaft hole and opening to an outer peripheral surface of the shaft,
• the rotor core including a plurality of core holes extending in the axial direction and disposed at intervals in a circumferential direction,
• the plate including;
• a through-hole overlapping the core hole when viewed in the axial direction;
• and
• a flow path connecting the second shaft hole and the through-hole, and
• the plate having an outer edge away from the central axis by a second distance that is shorter than a first distance from the central axis to an outer edge of the rotor core.