Patent ID: 8810096
Filing Date: 2014-08-19
Classification: F16C,G11B,H02K

Abstract:
1. A spindle motor comprising: a stationary portion including a stator; and a rotating portion including a rotor magnet and rotatably supported by the stationary portion; wherein the stationary portion includes: the rotating portion includes: an upper seal portion is arranged radially outward of the first gap, and a lower seal portion is arranged radially outward of the second gap, each of the upper seal portion and the lower seal portion including a respective surface of a lubricating oil located therein, the upper seal portion and the lower seal portion being arranged in communication with each other through the communicating hole; the communicating hole and a space extending from the upper seal portion to the lower seal portion through the first, second, and third gaps are filled with the lubricating oil; the first gap includes a dynamic pressure bearing defined therein; and the third gap includes a dynamic pressure generation portion arranged to induce a radially inward pressure acting on the lubricating oil.