WO2005028892A1 - 流体軸受装置 - Google Patents
流体軸受装置 Download PDFInfo
- Publication number
- WO2005028892A1 WO2005028892A1 PCT/JP2004/013015 JP2004013015W WO2005028892A1 WO 2005028892 A1 WO2005028892 A1 WO 2005028892A1 JP 2004013015 W JP2004013015 W JP 2004013015W WO 2005028892 A1 WO2005028892 A1 WO 2005028892A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- bearing
- peripheral surface
- bearing sleeve
- shaft member
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
-
- 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
-
- 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
- F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
- F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
-
- 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
-
- 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
-
- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
Definitions
- This type of fluid shaft bearing is a so-called round bearing (bearing) that does not have a dynamic pressure generating means that includes a dynamic pressure generating means that generates dynamic pressure in the lubricating oil in the bearing gap. Bearings whose surface is a perfect circle).
- press-fitting as the fixing means, it is possible to eliminate the above-mentioned adverse effects.
- the bearing sleeve is pressed into the inner peripheral surface of the housing under the action of ultrasonic vibration, that is, while applying ultrasonic vibration to the housing or / and the bearing sleeve.
- ultrasonic vibration that is, while applying ultrasonic vibration to the housing or / and the bearing sleeve.
- the area of the inner peripheral surface of the housing that comes into contact with the bearing sleeve is melted or softened by the action of ultrasonic vibration, so it is compared with the case of press-fitting alone (when press-fitting without applying ultrasonic vibration).
- fluctuations in the outer diameter of the housing and the inner diameter of the bearing sleeve due to press fitting can be suppressed, and good dimensional accuracy can be maintained.
- the generation of abrasion powder from the sliding portion between the housing and the bearing sleep is reduced, and contaminants are prevented from entering the inside of the bearing device.
- a housing a bearing sleeve disposed inside the housing, a shaft member inserted into an inner peripheral surface of the bearing sleeve, and lubrication generated in a radial bearing gap between an inner peripheral surface of the bearing sleeve and an outer peripheral surface of the shaft member.
- the housing is formed of the above resin material and At least one of the thrust member constituting the thrust bearing portion and the bearing sleeve may be press-fitted and welded to the inner peripheral surface of the housing under the action of ultrasonic vibration.
- ADVANTAGE OF THE INVENTION while reducing the manufacturing cost of a housing, it is possible to eliminate the need for an adhesive at the fixed portion between the housing and the bearing sleeve, thereby increasing the efficiency of the assembling process and further reducing the cost.
- a hydrodynamic bearing device can be provided.
- FIG. 2 is a cross-sectional view showing a hydrodynamic bearing device according to an embodiment of the present invention.
- FIG. 3 is a view of the housing as viewed from a direction A in FIG.
- FIG. 1 conceptually shows an example of a configuration of a spindle motor for information equipment incorporating a hydrodynamic bearing device (fluid dynamic bearing device) 1 according to this embodiment.
- This spind The motor is used in a disk drive device such as an HDD, and includes a hydrodynamic bearing device 1 that rotatably supports a shaft member 2 in a non-contact manner, a rotor (disk hub) 3 mounted on the shaft member 2, and, for example, a radius.
- a stator 4 and a rotor magnet 5 are opposed to each other with a gap in the direction.
- the stator 4 is mounted on the outer circumference of the bracket 6, and the rotor magnet 5 is mounted on the inner circumference of the disk hub 3.
- the housing 7 of the hydrodynamic bearing device 1 is mounted around the bracket 6.
- the upper end face 8 b of the bearing sleeve 8 is formed by a circumferential groove 8 b 1 provided at a substantially central portion in a radial direction, and an inner diameter side area 8 b 2 and an outer diameter side area.
- 8 b 3 and one or more radial grooves 8 b 21 are formed in the inner diameter side region 8 b 2.
- three radial grooves 8b21 are formed at equal circumferential intervals.
- the seal member 9 is, for example, fixed to the inner periphery of the upper end of the side part 7 a of the housing 7, and the inner peripheral surface 9 a thereof has a tapered surface 2 a 2 provided on the outer periphery of the shaft part 2 a and a predetermined sealing space. Facing through S.
- the diameter of the tapered surface 2a2 of the shaft portion 2a gradually decreases toward the upper side (outer side with respect to the housing 7). Still works.
- the outer diameter side area 9 b 1 of the lower end face 9 b of the seal member 9 is formed to have a slightly larger diameter than the inner diameter side area.
- the bearing sleeve 8 is press-fitted to a position where its lower end surface 8c abuts the step 7d of the housing 7.
- the axial position of the bearing sleep 8 with respect to the housing 7 can be accurately determined.
- Ultrasonic vibration is applied even after the press-in operation of the bearing sleep 8 is completed, or if the inner peripheral surface of the housing 7 is melted to the extent that it can be welded at the completion of the press-in operation, The application of the ultrasonic vibration is stopped, and the outer peripheral surface 8 d of the bearing sleeve 8 is welded to the inner peripheral surface 7 c of the housing 7 (ultrasonic welding).
- the diameter of the interference ⁇ is equal to the diameter.
- the value is set as a value that will leave about 10 ⁇ of interference. Note that the interference (initial value) ⁇ after press-fitting and welding is equal to the press-fit allowance during press-fitting, and the whole or part of the interference (initial value) ⁇ is the welding allowance.
- the amount of protrusion of the rib-shaped portion 7c1 in the inner diameter direction is substantially equal to the interference (initial value) ⁇ and is slight, so even if the rib-shaped portion 7c1 is formed, The cross-sectional area of the groove 8 d 1 is maintained as required.
- a first thrust bearing portion T2 and a second thrust bearing portion T2 that rotatably support the shaft member 2 in the thrust direction in a non-contact manner are configured.
- the thrust bearing clearance (referred to as ⁇ 1) of the first thrust bearing portion T 1 and the thrust bearing clearance (referred to as S 2) of the second thrust bearing portion ⁇ 2 are the steps from the inner bottom surface 7 b 1 of the housing 7.
- the shaft portion 2a of the shaft member 2 is inserted into the inner peripheral surface 8a of the bearing sleeve 8, and the flange portion 2b is brought into contact with the lower end surface 8c of the bearing sleeve 8 and the thrust.
- the member 10 is housed in the space between the end face 10 a and the member 10. Thereafter, the internal space of the housing 7 sealed with the seal portion 7 a is filled with the lubricating oil including the internal pores of the bearing sleeve 8. The oil level of the lubricating oil is maintained within the range of the seal space S.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/569,085 US7625124B2 (en) | 2003-09-18 | 2004-09-01 | Fluid bearing device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003326231A JP2005090653A (ja) | 2003-09-18 | 2003-09-18 | 流体軸受装置 |
JP2003-326231 | 2003-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005028892A1 true WO2005028892A1 (ja) | 2005-03-31 |
Family
ID=34372820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/013015 WO2005028892A1 (ja) | 2003-09-18 | 2004-09-01 | 流体軸受装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7625124B2 (ja) |
JP (1) | JP2005090653A (ja) |
KR (1) | KR20060061849A (ja) |
CN (2) | CN100400914C (ja) |
WO (1) | WO2005028892A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8277126B2 (en) | 2007-05-07 | 2012-10-02 | Ntn Corporation | Fluid dynamic bearing device |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4794907B2 (ja) | 2005-05-24 | 2011-10-19 | Ntn株式会社 | 流体軸受装置およびこれを備えたモータ |
JP4621555B2 (ja) * | 2005-07-14 | 2011-01-26 | 富士重工業株式会社 | 圧入装置及び圧入方法 |
JP2008082474A (ja) * | 2006-09-28 | 2008-04-10 | Aisan Ind Co Ltd | 軸受固定構造及び軸受固定方法 |
JP5318344B2 (ja) * | 2006-11-30 | 2013-10-16 | Ntn株式会社 | 流体軸受装置およびその製造方法 |
DE102008060849A1 (de) * | 2008-12-06 | 2010-06-10 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Rotierende Maschine, insbesondere Turbolader |
JP5752437B2 (ja) * | 2010-02-26 | 2015-07-22 | Ntn株式会社 | 流体動圧軸受装置 |
US8926183B2 (en) * | 2011-03-09 | 2015-01-06 | Ntn Corporation | Fluid dynamic bearing device |
KR101273676B1 (ko) * | 2011-06-10 | 2013-06-12 | 조국환 | 휴대용 초음파 금속 용착기 |
TWI509949B (zh) | 2013-12-31 | 2015-11-21 | Sunonwealth Electr Mach Ind Co | 具有止推軸承的馬達 |
JP6795373B2 (ja) * | 2016-10-18 | 2020-12-02 | マブチモーター株式会社 | 軸受ユニットおよびモータ |
CN111433472B (zh) * | 2017-12-08 | 2021-12-28 | Ntn株式会社 | 流体动压轴承装置 |
JP2020165471A (ja) * | 2019-03-29 | 2020-10-08 | 日本電産株式会社 | 気体動圧軸受、モータおよび送風装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH053630U (ja) * | 1991-07-02 | 1993-01-19 | 中部ベアリング株式会社 | 軸 受 |
JPH06137323A (ja) * | 1992-10-23 | 1994-05-17 | Ntn Corp | すべり軸受の製造方法 |
JPH10159854A (ja) * | 1996-11-25 | 1998-06-16 | Ntn Corp | 複合滑り軸受 |
JP2000291648A (ja) * | 1999-04-05 | 2000-10-20 | Ntn Corp | 動圧型軸受ユニット |
JP2002276666A (ja) * | 2001-03-21 | 2002-09-25 | Ntn Corp | 動圧型軸受ユニット |
JP2003239974A (ja) * | 2002-02-20 | 2003-08-27 | Ntn Corp | 動圧軸受装置及びその製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3237869B2 (ja) | 1991-06-26 | 2001-12-10 | 株式会社東芝 | 電力系統運用訓練シミュレータ |
JP3701107B2 (ja) | 1997-07-30 | 2005-09-28 | 日立粉末冶金株式会社 | 軸受の製造方法 |
US6390681B1 (en) | 1999-04-05 | 2002-05-21 | Ntn Corporation | Dynamic pressure bearing-unit |
US6361214B1 (en) * | 1999-08-02 | 2002-03-26 | Nidec Corporation | Hydrodynamic-pressure bearing device and motor provided with the hydrodynamic-pressure bearing device |
WO2003027521A1 (fr) * | 2001-09-21 | 2003-04-03 | Sony Corporation | Unite de palier et moteur utilisant cette unite |
US7048444B2 (en) | 2001-11-13 | 2006-05-23 | Ntn Corporation | Fluid lubricated bearing device |
CN1321274C (zh) | 2001-11-13 | 2007-06-13 | Ntn株式会社 | 流体轴承装置 |
US7296931B2 (en) | 2002-11-13 | 2007-11-20 | Ntn Corporation | Fluid lubricated bearing device |
US20070230843A1 (en) | 2006-01-06 | 2007-10-04 | Tetsuya Kurimura | Fluid lubricated bearing device |
KR100968163B1 (ko) * | 2002-04-23 | 2010-07-06 | 엔티엔 가부시키가이샤 | 유체 베어링 장치 |
-
2003
- 2003-09-18 JP JP2003326231A patent/JP2005090653A/ja not_active Withdrawn
-
2004
- 2004-09-01 US US10/569,085 patent/US7625124B2/en not_active Expired - Fee Related
- 2004-09-01 CN CNB2004800264733A patent/CN100400914C/zh not_active Expired - Fee Related
- 2004-09-01 CN CN2007101943737A patent/CN101216074B/zh not_active Expired - Fee Related
- 2004-09-01 WO PCT/JP2004/013015 patent/WO2005028892A1/ja active Application Filing
- 2004-09-01 KR KR1020067003960A patent/KR20060061849A/ko not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH053630U (ja) * | 1991-07-02 | 1993-01-19 | 中部ベアリング株式会社 | 軸 受 |
JPH06137323A (ja) * | 1992-10-23 | 1994-05-17 | Ntn Corp | すべり軸受の製造方法 |
JPH10159854A (ja) * | 1996-11-25 | 1998-06-16 | Ntn Corp | 複合滑り軸受 |
JP2000291648A (ja) * | 1999-04-05 | 2000-10-20 | Ntn Corp | 動圧型軸受ユニット |
JP2002276666A (ja) * | 2001-03-21 | 2002-09-25 | Ntn Corp | 動圧型軸受ユニット |
JP2003239974A (ja) * | 2002-02-20 | 2003-08-27 | Ntn Corp | 動圧軸受装置及びその製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8277126B2 (en) | 2007-05-07 | 2012-10-02 | Ntn Corporation | Fluid dynamic bearing device |
Also Published As
Publication number | Publication date |
---|---|
US7625124B2 (en) | 2009-12-01 |
CN101216074B (zh) | 2010-06-02 |
KR20060061849A (ko) | 2006-06-08 |
JP2005090653A (ja) | 2005-04-07 |
US20070092170A1 (en) | 2007-04-26 |
CN100400914C (zh) | 2008-07-09 |
CN101216074A (zh) | 2008-07-09 |
CN1853051A (zh) | 2006-10-25 |
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