Patent ID: 9068589
Filing Date: 2015-06-30
Classification: F16C

Abstract:
1. A rotating device comprising: a shaft body comprising a shaft, a first flange extending outwardly in a radial direction from an outer periphery surface of the shaft at a first end side, and a second flange extending outwardly in the radial direction from a second end of the shaft; a bearing unit comprising a shaft encircling member that encircles at least a part of the shaft, the bearing unit being rotatable relative to the shaft body; a first thrust opposing part formed in a gap between the shaft encircling member and the first flange in an axial direction; an intermediate space provided in a gap between the shaft and the shaft encircling member in the radial direction; a radial dynamic pressure bearing part comprising a first radial dynamic pressure bearing provided at a first-thrust-opposing-part side of the intermediate space, the radial dynamic pressure bearing part generating dynamic pressure to a lubricant present between the shaft body and the bearing body; a first communication channel that allows the first thrust opposing part to be in communication with the intermediate space; and a base provided with a base opening that retains at least a part of the shaft body and fixes the shaft body; wherein: the shaft comprises an upper rod including the first flange, and a lower rod including the second flange; the upper rod has a fastener retainer hole formed in an end portion of the upper rod at a first-flange side; the fastener retainer hole is formed so as to hold a fastener that fastens a top cover; at least a part of the lower rod is inserted in and fixed to the base opening to fix the lower rod to the base; the fastener retainer hole extends in the axial direction over a region where the first radial dynamic pressure bearing is formed; the upper rod has a lower rod retainer hole formed in an opposite end portion to the end portion where the fastener retainer hole is formed; a part of the lower rod is inserted in the lower rod retainer hole to fasten the upper rod with the lower rod; and the fastener retainer hole is not in communication with the lower rod retainer hole in the axial direction.