Rotor, rotary electric machine, and drive apparatus

A rotor that is rotatable about a central axis, comprising:

• a shaft that extends in an axial direction;
• a rotor core that has a plurality of core pieces arranged in the axial direction and is fixed to an outer peripheral surface of the shaft;
• and
• an annular plate that is arranged between the core pieces adjacent in the axial direction and surrounds the shaft,
• wherein the shaft includes
• a first shaft hole that extends in the axial direction, and
• a second shaft hole that has an opening opened to the outer peripheral surface of the shaft and is connected to the first shaft hole,
• a surface on one side of the plate in the axial direction has
• a first surface that is provided at an inner edge of the plate in a radial direction and extends in a circumferential direction, and
• a second surface that is positioned on an outside, in the radial direction, with respect to the first surface,
• the first surface and the second surface are arranged away from the core piece, which is positioned on the one side of the plate in the axial direction, toward another side in the axial direction, and
• the plate includes
• a plurality of plate through-holes that are provided on the second surface and are arranged at intervals in the circumferential direction, and
• a plate wall that protrudes to one side in the axial direction from a portion of the first surface positioned on an outside, in the radial direction, with respect to an inner edge in the radial direction, and extends in the circumferential direction.