Patent ID: 8711515

Claim:
A motor comprising: a stator; and a rotor which is arranged to rotate relative to the stator about a center axis as a center; wherein the rotor includes: a disk portion; a cylindrical portion which extends downward in an axial direction from the disk portion; and a stopper that is cylindrical or substantially cylindrical, is disposed on an inner side in a radial direction of the cylindrical portion and is fixed to an inner surface of the cylindrical portion; the cylindrical portion includes a cylindrical portion protruding portion which protrudes inward in the radial direction and opposes an outer surface of the stopper in the radial direction; the stopper includes a stopper protruding portion which protrudes outward in the radial direction, opposes the inner surface of the cylindrical portion, and opposes the cylindrical portion protruding portion in the axial direction; an adhesive is included between the cylindrical portion and the stopper; a gap in the radial direction between an upper end portion of the outer surface of the stopper and an inner peripheral surface of the cylindrical portion protruding portion defines a first tapered gap in which a gap in the radial direction widens upward in the axial direction; a gap in the radial direction between a lower end portion of the outer surface of the stopper protruding portion and an inner peripheral surface of the cylindrical portion defines a second tapered gap in which a gap in the radial direction widens downward in the axial direction; the adhesive is included in at least a portion of the first tapered gap and in at least a portion of the second tapered gap; the stator includes an annular surface that widens in the radial direction; and the annular surface is positioned below the second tapered gap and the second tapered gap opposes the annular surface in the axial direction.