Title:
流体動圧軸受装置、スピンドルモータ、およびハードディスク駆動装置
Document Type and Number:
Japanese Patent JP7424906
Kind Code:
B2
Abstract:
To provide a fluid dynamic pressure bearing device which suppresses discharge of an out gas generated from an adhesive agent to the outside.SOLUTION: A fluid dynamic pressure bearing device includes: a base part 101 including a shaft 102; a rotor 110 supported so as to rotate relatively with respect to the base part 101; a dynamic pressure bearing part 215 formed by an outer peripheral surface of the shaft 102 and an inner peripheral surface of the rotor 110 opposed to the shaft 102; a lubrication oil C filled in the dynamic pressure bearing part 215; and a cap 160 which is fitted in an annular protrusion part 150 provided at the rotor 110. The cap 160 includes a flat plate part 161, and a cylindrical part 162 extending axially downward from an edge part of the flat plate part 161. Between the outer peripheral surface of the annular protrusion part 150 and an inner peripheral surface of the cylindrical part 162 of the cap 160, a fitting region 164 is provided. Between the cylindrical part 162 of the cap 160 and the rotor 110, a closed space 170 adjacent to the fitting region 164 is provided across the whole periphery, and a sealing material is held in the closed space.SELECTED DRAWING: Figure 4
Inventors:
Hideaki Showa
Daigo Nakashima
Daigo Nakashima
Application Number:
JP2020081079A
Publication Date:
January 30, 2024
Filing Date:
May 01, 2020
Export Citation:
Assignee:
MinebeaMitsumi Inc.
International Classes:
F16C33/74; F16C17/10; F16C35/10; F16C43/02; G11B19/20
Domestic Patent References:
| JP2010270905A | ||||
| JP2012184835A |
Attorney, Agent or Firm:
Mikio Suenari
Previous Patent: Coating liquid for electrophotographic photoreceptor undercoat layer and its uses
Next Patent: Multicore plastic fiber optic cable
Next Patent: Multicore plastic fiber optic cable