WO2004084381A1 - モータおよび記録媒体駆動装置 - Google Patents
モータおよび記録媒体駆動装置 Download PDFInfo
- Publication number
- WO2004084381A1 WO2004084381A1 PCT/JP2003/003320 JP0303320W WO2004084381A1 WO 2004084381 A1 WO2004084381 A1 WO 2004084381A1 JP 0303320 W JP0303320 W JP 0303320W WO 2004084381 A1 WO2004084381 A1 WO 2004084381A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- shaft body
- dynamic pressure
- rotor
- permanent magnet
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/107—Grooves for generating pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
- F16C17/026—Sliding-contact bearings for exclusively rotary movement for radial load only with helical grooves in the bearing surface to generate hydrodynamic pressure, e.g. herringbone grooves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
Definitions
- a hard disk device mounted on a terminal device such as a stationary personal computer or a portable notebook computer rotates a disk-shaped recording medium at a predetermined rotation speed.
- a motor see, for example, Japanese Patent No. 3184794.
- the permanent magnet is provided radially inward of the core and coil, As described above, the core and the coil are not provided radially inward of the rotor for fixing the permanent magnet. Therefore, it is possible to reduce the diameter of the rotor.
- the recording medium drive of this invention since the diameter dimension of a rotor can be made small, the miniaturization of a recording medium drive can be achieved.
- the diameter of the rotor can be reduced, for example, when the recording medium is a disk-shaped so-called disk-type recording medium having a central hole at the center for fixing to the fixed portion of the rotor, the central hole Can be made smaller. Therefore, without increasing the outer diameter of the recording medium, the surface area of the recording medium on which various information is recorded can be increased, and the recording capacity of the recording medium can be increased.
- FIG. 1 is a sectional view showing a motor according to an embodiment of the present invention.
- the fluid dynamic pressure bearing 4 includes a shaft 5 formed in a cylindrical shape having a substantially cruciform cross section, and a sleeve (shaft) having a shaft embedment hole 7 a having a substantially cruciform cross section for rotatably housing the shaft 5. And a lubricating oil (fluid) 9 filled in a gap between the shaft body insertion hole 7 a and the shaft body 5.
- These dynamic pressure generating grooves collect the lubricating oil 9 to generate dynamic pressure when the shaft body 5 is rotated around the central axis A1, and the shaft body 5 is rotatably supported by the sleeve 7. is there. That is, the dynamic pressure (radial dynamic pressure) of the lubricating oil 9 generated in the dynamic pressure generating groove 17 of the radial shaft portion 15 serves as a bearing in the radial direction of the shaft body 5, and the dynamic force of the thrust shaft portion 11
- the dynamic pressure (thrust dynamic pressure) of the lubricating oil 9 generated in the pressure generating groove serves as a bearing in the direction of the central axis A1 of the shaft body 5.
- the lubricating oil 9 and the dynamic pressure generating groove constitute a dynamic pressure generating part 20.
- the disk-type recording medium 50 rotates stably when the disk-type recording medium 50 is rotated. It is possible to prevent a problem at the time of writing or at the time of reading the recording from the disk-type recording medium 50.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Sliding-Contact Bearings (AREA)
- Rotational Drive Of Disk (AREA)
- Motor Or Generator Frames (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB038261618A CN100350721C (zh) | 2003-03-19 | 2003-03-19 | 马达及记录介质驱动装置 |
JP2004569575A JPWO2004084381A1 (ja) | 2003-03-19 | 2003-03-19 | モータおよび記録媒体駆動装置 |
PCT/JP2003/003320 WO2004084381A1 (ja) | 2003-03-19 | 2003-03-19 | モータおよび記録媒体駆動装置 |
US10/549,297 US7307364B2 (en) | 2003-03-19 | 2003-03-19 | Motor and recording medium drive device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/003320 WO2004084381A1 (ja) | 2003-03-19 | 2003-03-19 | モータおよび記録媒体駆動装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004084381A1 true WO2004084381A1 (ja) | 2004-09-30 |
Family
ID=33018154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/003320 WO2004084381A1 (ja) | 2003-03-19 | 2003-03-19 | モータおよび記録媒体駆動装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7307364B2 (ja) |
JP (1) | JPWO2004084381A1 (ja) |
CN (1) | CN100350721C (ja) |
WO (1) | WO2004084381A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100388592C (zh) * | 2004-12-13 | 2008-05-14 | 奇鋐科技股份有限公司 | 马达的结构 |
CN101051497B (zh) * | 2006-02-22 | 2010-08-04 | 三星电机株式会社 | 流体动力轴承电动机 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5274820B2 (ja) * | 2007-12-07 | 2013-08-28 | Ntn株式会社 | 流体軸受装置 |
JP4952835B2 (ja) * | 2009-11-20 | 2012-06-13 | 株式会社デンソー | 変形折返しダイポールアンテナ及びそのインピーダンス調整方法、アンテナ装置 |
KR101101638B1 (ko) | 2010-07-13 | 2012-01-02 | 삼성전기주식회사 | 모터 및 기록 디스크 구동장치 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001033725A (ja) * | 1999-07-19 | 2001-02-09 | Canon Inc | 動圧軸受および偏向走査装置 |
JP2001069704A (ja) * | 1999-08-31 | 2001-03-16 | Seiko Instruments Inc | 電動機及びそのロータのバランス調整方法 |
JP3184795B2 (ja) * | 1997-12-18 | 2001-07-09 | セイコーインスツルメンツ株式会社 | スピンドルモータ、及びスピンドルモータを回転体の駆動源とする回転体装置 |
JP2003049828A (ja) * | 2001-08-06 | 2003-02-21 | Seiko Instruments Inc | 流体動圧軸受及びスピンドルモータ |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3140814B2 (ja) * | 1991-10-18 | 2001-03-05 | 日本サーボ株式会社 | 永久磁石式ステッピングモ−タ |
JP3184794B2 (ja) | 1997-12-18 | 2001-07-09 | セイコーインスツルメンツ株式会社 | スピンドルモータ、及びスピンドルモータを回転体の駆動源とする回転体装置 |
JP2002233105A (ja) * | 2000-11-30 | 2002-08-16 | Seiko Instruments Inc | 流体動圧軸受モータ |
JP2003009462A (ja) * | 2001-06-22 | 2003-01-10 | Nippon Densan Corp | スピンドルモータ |
-
2003
- 2003-03-19 US US10/549,297 patent/US7307364B2/en not_active Expired - Fee Related
- 2003-03-19 CN CNB038261618A patent/CN100350721C/zh not_active Expired - Fee Related
- 2003-03-19 WO PCT/JP2003/003320 patent/WO2004084381A1/ja active Application Filing
- 2003-03-19 JP JP2004569575A patent/JPWO2004084381A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3184795B2 (ja) * | 1997-12-18 | 2001-07-09 | セイコーインスツルメンツ株式会社 | スピンドルモータ、及びスピンドルモータを回転体の駆動源とする回転体装置 |
JP2001033725A (ja) * | 1999-07-19 | 2001-02-09 | Canon Inc | 動圧軸受および偏向走査装置 |
JP2001069704A (ja) * | 1999-08-31 | 2001-03-16 | Seiko Instruments Inc | 電動機及びそのロータのバランス調整方法 |
JP2003049828A (ja) * | 2001-08-06 | 2003-02-21 | Seiko Instruments Inc | 流体動圧軸受及びスピンドルモータ |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100388592C (zh) * | 2004-12-13 | 2008-05-14 | 奇鋐科技股份有限公司 | 马达的结构 |
CN101051497B (zh) * | 2006-02-22 | 2010-08-04 | 三星电机株式会社 | 流体动力轴承电动机 |
Also Published As
Publication number | Publication date |
---|---|
US7307364B2 (en) | 2007-12-11 |
CN100350721C (zh) | 2007-11-21 |
JPWO2004084381A1 (ja) | 2006-06-29 |
US20060220480A1 (en) | 2006-10-05 |
CN1759519A (zh) | 2006-04-12 |
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