Rotating device
AssigneeSamsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
InventorRyusuke Sugiki
Life of this patent
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Abstract
A rotating device includes a shaft body that has a shaft, a first flange extending outwardly from the outer periphery of the shaft, and a second flange, a bearing body that has a shaft encircling member encircling the shaft between the first flange and the second flange, a first thrust opposing part formed between the shaft encircling member and the first flange, a second thrust opposing part formed between the shaft encircling member and the second flange, an intermediate space provided in a gap between the shaft and the shaft encircling member, a radial dynamic pressure bearing, a first communication channel that allows the first thrust opposing part to be in communication with the intermediate space, and a second communication channel that allows the second thrust opposing part to be in communication with the intermediate space.
Claims4
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.
Dependencies are inferred from the claim text.