BALL BEARING AND WIND POWER GENERATOR INCLUDING THE SAME

摘要

Disclosed are a ball bearing and a wind power generator including the same. The ball bearing according an embodiment of the present invention includes a ball, an inner race, and an outer race. The cross section of the ball has a pair of arc portions which are symmetrical to each other on the basis of a rotation axis of the ball and have a semi-circular shape, and a center portion between the arc portions. The cross section of the inner race consists of two curved surfaces which are symmetrical to each other on the basis of a vertical line passing the center point of the cross section of the ball and being perpendicular to the rotation axis and have the same radius of curvature. The cross section of the inner race has the plane of an orbit of the inner race of which both end portions pass the center point of the first arc portion close to the inner race and are parallel with the rotation axis. The cross section of the outer race consists of two curved surfaces which are symmetrical to each other on the basis of a vertical line passing the center point of the cross section of the ball and being perpendicular to the rotation axis and have the same radius of curvature. The cross section of the outer race has the plane of an orbit of the outer race of which both end portions pass the center point of the second arc portion close to the outer race and are parallel with the rotation axis.