Title:
DYNAMIC PRESSURE BEARING DEVICE AND MOTOR USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/117239
Kind Code:
A1
Abstract:
A dynamic pressure bearing device (1) enabling an increase in the assembly accuracy of a motor and a reduction in cost and the motor using the bearing device. The bearing device comprises a housing (7) and a bearing sleeve (8) in the form of a fixed side member (2) and a shaft member (9) and a disk hub (10) in the form of a rotating side member (3) having a mounting part (3c) for a rotor magnet (5). When the shaft member (9) is rotated, the bearing sleeve (8) supports, in the state of non-contact with each other, the shaft member (9) in the radial direction by the dynamic pressure action of a lubricating oil produced in the clearance of a radial bearing between the inner peripheral surface (8a) of the bearing sleeve (8) and the outer peripheral surface (9a) of the shaft member. Also, the bearing device comprises the disk hub (10) fixed to the shaft member (9) and having the mounting part (3c) for the rotor magnet (5), and the disk hub (10) is formed in a resin molding formed by insert-molding the shaft member (9) in the form of an insert part.
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Inventors:
SATOJI FUMINORI (JP)
NAKAJIMA RYOUICHI (JP)
KOMORI ISAO (JP)
OKAMURA KAZUO (JP)
OKUMA MASAFUMI (JP)
MITANI KENICHI (JP)
NAKAJIMA RYOUICHI (JP)
KOMORI ISAO (JP)
OKAMURA KAZUO (JP)
OKUMA MASAFUMI (JP)
MITANI KENICHI (JP)
Application Number:
PCT/JP2005/008891
Publication Date:
December 08, 2005
Filing Date:
May 16, 2005
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
SATOJI FUMINORI (JP)
NAKAJIMA RYOUICHI (JP)
KOMORI ISAO (JP)
OKAMURA KAZUO (JP)
OKUMA MASAFUMI (JP)
MITANI KENICHI (JP)
SATOJI FUMINORI (JP)
NAKAJIMA RYOUICHI (JP)
KOMORI ISAO (JP)
OKAMURA KAZUO (JP)
OKUMA MASAFUMI (JP)
MITANI KENICHI (JP)
International Classes:
F16C33/10; F16C33/20; F16C33/74; F16C17/10; H02K5/16; H02K7/08; (IPC1-7): H02K7/08; F16C17/10; F16C33/20
Foreign References:
| JP2003189522A | 2003-07-04 | |||
| JPH10215548A | 1998-08-11 | |||
| JP2004092814A | 2004-03-25 | |||
| JP2003329032A | 2003-11-19 |
Attorney, Agent or Firm:
Ehara, Syogo (15-26 Edobori 1-chome, Nishi-ku, Osaka-sh, Osaka 02, JP)
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