Motor including dynamic bearing with seal portion and disk drive apparatus including the same

A motor comprising:

• a stationary portion;
• and
• a rotating portion arranged to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion;
• wherein
• the stationary portion includes:
• a shaft arranged to extend in an axial direction;
• and
• a cup portion fixed to the shaft;
• the rotating portion includes:
• a sleeve portion including at least a portion thereof arranged inside the cup portion, and arranged opposite to the shaft;
• the cup portion includes:
• a cylindrical portion arranged radially opposite to an outer circumferential surface of the sleeve portion;
• a bottom plate portion arranged inside the cylindrical portion;
• and
• a first conical portion arranged to extend upward from an inner end portion of the bottom plate portion, and fixed to the shaft;
• a lubricant is arranged between the sleeve portion and a combination of the shaft and the cup portion;
• a first seal portion is defined in a gap between the outer circumferential surface of the sleeve portion and an inner circumferential surface of the cylindrical portion, and a liquid surface of the lubricant is located in the first seal portion;
• and
• at least one of an outer circumferential surface of the first conical portion and an inner circumferential surface of the sleeve portion includes a first dynamic pressure generating groove array arranged to induce a dynamic pressure in the lubricant.