Patent ID: 8794839
Filing Date: 2014-08-05
Classification: F16C,G11B,H02K

Abstract:
1. A bearing apparatus comprising: a stationary member including a stationary shaft arranged along a center axis extending in a vertical direction, and a first annular member being substantially annular in shape and fixed to an outer circumferential surface of the stationary shaft; a rotating member supported to be rotatable about the center axis around the stationary shaft; and a lubricating oil; wherein the rotating member includes: the lubricating oil is arranged in a gap between a surface of the stationary member and the rotating member; an upper surface of the lubricating oil is located between the first annular member and the second inner circumferential surface of the rotating member; on an upper side of the upper surface of the lubricating oil, the first annular member and the rotating member are arranged radially opposite to each other with a gap defined therebetween to together define a labyrinth seal; the labyrinth seal and a fixing range over which the stationary shaft and the first annular member are fixed to each other are arranged to overlap with each other in a radial direction; the first annular member includes: an upper end portion of the first inner circumferential surface of the rotating member is arranged at a level higher than a level of a lower end portion of the cylindrical or substantially cylindrical portion.