DE102005019944B3 - Hydrodynamic bearing for spindle motor has bearing shell with interior annular extension on which inner edge of covering cap rests - Google Patents
Hydrodynamic bearing for spindle motor has bearing shell with interior annular extension on which inner edge of covering cap rests Download PDFInfo
- Publication number
- DE102005019944B3 DE102005019944B3 DE102005019944A DE102005019944A DE102005019944B3 DE 102005019944 B3 DE102005019944 B3 DE 102005019944B3 DE 102005019944 A DE102005019944 A DE 102005019944A DE 102005019944 A DE102005019944 A DE 102005019944A DE 102005019944 B3 DE102005019944 B3 DE 102005019944B3
- Authority
- DE
- Germany
- Prior art keywords
- bearing
- gap
- cap
- hydrodynamic bearing
- bearing sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003566 sealing material Substances 0.000 claims description 8
- 229920002313 fluoropolymer Polymers 0.000 claims description 2
- 239000004811 fluoropolymer Substances 0.000 claims description 2
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 8
- 239000012530 fluid Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
-
- 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
- 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
- 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
-
- 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
- G11B19/2036—Motors characterized by fluid-dynamic bearings
-
- 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
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)
Abstract
Description
Gebiet der ErfindungTerritory of invention
Die
Erfindung betrifft ein hydrodynamisches Lager, einen Spindelmotor
und ein Festplattenlaufwerk nach dem Patent
Es hat sich jedoch herausgestellt, dass es bei ungünstigen Belastungen des Lagers, insbesondere starken Stoßbelastungen sowie auch beim Zusammenbau des Lagers, vorkommen kann, dass Lagerfluid aus dem Ausgleichsvolumen bzw. dem Verbindungskanal oder Verbindungsspalt zwischen dem inneren Durchmesser der Abdeckkappe und dem gegenüberliegenden Außendurchmesser der Welle austritt.It However, it has been found that in case of unfavorable loads on the warehouse, especially strong impact loads as well as during assembly of the bearing, may occur that bearing fluid from the compensating volume or the connecting channel or connecting gap between the inner diameter of the cap and the opposite outer diameter the wave emerges.
Die
Die
Gegenstand der Erfindungobject the invention
Aufgabe der Erfindung ist es deshalb, ein hydrodynamisches Lager gemäß dem Hauptpatent zu entwickeln, bei dem das Risiko eines Austrittes von Lagerfluid zwischen der Abdeckkappe und der Welle bei der Montage der Lagerkomponenten, beim Befüllen des Lagers mit Hydrofluid sowie auch bei ungünstigen Belastungen vermieden wird.task The invention is therefore a hydrodynamic bearing according to the main patent to develop, where the risk of leakage of bearing fluid between the cap and the shaft during assembly of the bearing components, when filling the bearing with hydrofluid as well as under unfavorable loads avoided becomes.
Diese Aufgabe wird erfindungsgemäß durch ein hydrodynamisches Lager gemäß den Merkmalen des unabhängigen Patentanspruchs gelöst.These The object is achieved by a Hydrodynamic bearing according to the features of independent Patent claim solved.
Die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.The under claims show further advantageous embodiments of the invention.
Nach der in diesem Zusatzpatent beschriebenen Ausgestaltung der Erfindung ist an dem durch die Abdeckkappe verschlossenen Stirnende der Lagerhülse ein radial innenliegender Ringansatz vorgesehen, auf dem der innere Rand der Abdeckkappe aufliegt. Dadurch wird erreicht, dass das Ausgleichsvolumen bzw. der Verbindungskanal oder Verbindungsspalt gegenüber dem Lagerspalt im wesentlichen abgedichtet ist, so dass auch bei ungünstigen Belastungen des Lagers kein Lagerfluid aus dem durch das Stirnende der Lagerhülse und die Abdeckkappe gebildeten Hohlraum austreten kann. Weiterhin wird gewährleistet, dass die Abdeckkappe parallel zur Oberfläche der Lagerhülse aufliegt, wodurch sich konstante Volumenverhältnisse ergeben.To the embodiment of the invention described in this additional patent is at the closed by the cap front end of the bearing sleeve a provided radially inner annular shoulder on which the inner Edge of the cap rests. This will ensure that the compensation volume or the connecting channel or connecting gap with respect to the Bearing gap is essentially sealed, so even under adverse conditions the bearing no bearing fluid from the through the front end of the bearing sleeve and the cap formed cavity can escape. Continue guaranteed the cover cap rests parallel to the surface of the bearing sleeve, resulting in constant volume ratios.
In einer bevorzugten Ausführungsform der Erfindung ist es vorgesehen, dass zur Verbindung des Ausgleichsvolumens bzw. des Verbindungskanals oder/-spaltes mit dem Lagerspalt mindestens ein im wesentlichen radial verlaufender Kanal vorgesehen ist, der den Ringansatz durchbricht. Dieser zusätzliche Kanal kann auch als Teil des Verbindungskanals bzw. -spaltes ausgebildet sein.In a preferred embodiment The invention provides that for the connection of the compensation volume or the connecting channel or /-gap with the bearing gap at least one is provided substantially radially extending channel, the Ring approach breaks through. This additional channel can also be called Part of the connecting channel or gap may be formed.
In einer weiteren vorteilhaften Ausführungsform der Erfindung kann es vorgesehen sein, dass zwischen den aneinander angrenzenden Oberflächen der Abdeckkappe und des Ringansatzes ein Dichtmaterial angeordnet ist, das die Dichtwirkung der erfindungsgemäßen Anordnung verstärkt. Dieses Dichtmaterial kann als Kunststofffilm oder als Materialbeschichtung ausgebildet sein.In a further advantageous embodiment of the invention, it may be provided that between the adjoining surfaces of the cap and the annular shoulder a sealing material is arranged, which enhances the sealing effect of the arrangement according to the invention. This sealing material can be used as a plastic film or as Materi Al coating be formed.
Ferner kann zwischen den aneinander angrenzenden Oberflächen der Abdeckkappe und der Lagerhülse, also am Außendurchmesser der Lagerhülse ebenfalls ein Dichtmaterial angeordnet werden, so dass die Abdeckkappe hermetisch dicht auf der Lagerhülse aufliegt.Further can between the adjacent surfaces of the cap and the bearing sleeve, so on the outside diameter the bearing sleeve also a sealing material can be arranged so that the cap hermetically sealed on the bearing sleeve rests.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels näher beschrieben.in the The invention will be described in more detail below with reference to an exemplary embodiment.
Kurze Beschreibung der ZeichnungenShort description the drawings
Beschreibung eines bevorzugten Ausführungsbeispielsdescription a preferred embodiment
In den Zeichnungen sind entsprechende, im Hauptpatent beschriebene Bauteile mit denselben Bezugszeichen bezeichnet.In The drawings are corresponding, described in the main patent Components with the same reference numerals.
Das
in
Die
Welle
Zwischen
der Stirnseite
Zwischen
der Welle
Das
Ausgleichsvolumen
Erfindungsgemäß ist nun
an der oberen Stirnseite
Die
Flächen
des Ringansatzes
- 1010
- Wellewave
- 10'10 '
- Wellenendeshaft end
- 1212
- Lagerhülsebearing sleeve
- 12', 12''12 ', 12' '
- Stirnende der Lagerhülsefront end the bearing sleeve
- 1414
- Druckplatteprinting plate
- 1616
- Widerlagerabutment
- 1818
- Abdeckkappecap
- 18'18 '
- Boden der Abdeckkappeground the cap
- 18''18 ''
- Öffnung (Befüll-)Opening (filling)
- 2020
- Ausgleichsvolumencompensating volume
- 2222
- Rotationsachseaxis of rotation
- 2424
- Lagerspaltbearing gap
- 2626
- Verbindungskanal/-spalt/ -Spalt connecting channel
- 2828
- RückführungskanalReturn passage
- 3030
- Abstandhalterspacer
- 3232
- Rand der Abdeckkappeedge the cap
- 3434
- Öffnungopening
- 3636
- Ringansatzannular shoulder
- 3838
- Kanalchannel
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005019944A DE102005019944B3 (en) | 2003-11-11 | 2005-04-29 | Hydrodynamic bearing for spindle motor has bearing shell with interior annular extension on which inner edge of covering cap rests |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10352573A DE10352573B4 (en) | 2003-11-11 | 2003-11-11 | Hydrodynamic bearing, spindle motor and hard disk drive |
DE102005019944A DE102005019944B3 (en) | 2003-11-11 | 2005-04-29 | Hydrodynamic bearing for spindle motor has bearing shell with interior annular extension on which inner edge of covering cap rests |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005019944B3 true DE102005019944B3 (en) | 2007-01-18 |
Family
ID=37563703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005019944A Expired - Lifetime DE102005019944B3 (en) | 2003-11-11 | 2005-04-29 | Hydrodynamic bearing for spindle motor has bearing shell with interior annular extension on which inner edge of covering cap rests |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102005019944B3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008062524A1 (en) * | 2008-12-16 | 2010-06-17 | Minebea Co., Ltd. | Fluid-dynamic bearing system for rotating spindle motor in hard disk storage drive, has inwardly directed collar fixed in free space under formation of slot, where slot connects axial section of bearing gap with radial section of gap |
DE102010056251A1 (en) | 2010-12-24 | 2012-06-28 | Minebea Co., Ltd. | Fluid bearing for spindle motor, has shaft that is rotatably mounted in relative to bearing bush by fluid dynamic radial bearing and hydrostatic thrust bearing about rotation axis |
DE102014006498A1 (en) | 2014-05-06 | 2015-11-12 | Minebea Co., Ltd. | Fluid dynamic storage system |
WO2018069017A1 (en) * | 2016-10-14 | 2018-04-19 | Zf Friedrichshafen Ag | Acoustic bridge |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5120139A (en) * | 1990-04-18 | 1992-06-09 | Matsushita Electric Industrial Co., Ltd. | Dynamic pressure gas bearing |
US5667309A (en) * | 1994-11-15 | 1997-09-16 | Sankyo Seiki Mfg. Co., Ltd. | Bearing seal system |
US6236129B1 (en) * | 1998-09-01 | 2001-05-22 | Matsushita Electric Industrial Co., Ltd. | Motor with hydrodynamic bearing and heat sink device employing this motor |
US20030113045A1 (en) * | 2000-07-27 | 2003-06-19 | Hiroyasu Fujinaka | Bearing device and motor with the bearing device |
DE20218170U1 (en) * | 2002-07-15 | 2003-08-28 | Minebea Co., Ltd., Miyota, Kitasaku | Hydrodynamic bearing, especially for the spindle motor of a hard disk drive, has a design that ensures as small a power loss as possible, high bearing rigidity and a long service life |
JP2003244886A (en) * | 2002-02-18 | 2003-08-29 | Nippon Densan Corp | Spindle motor and recording disc drive |
-
2005
- 2005-04-29 DE DE102005019944A patent/DE102005019944B3/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5120139A (en) * | 1990-04-18 | 1992-06-09 | Matsushita Electric Industrial Co., Ltd. | Dynamic pressure gas bearing |
US5667309A (en) * | 1994-11-15 | 1997-09-16 | Sankyo Seiki Mfg. Co., Ltd. | Bearing seal system |
US6236129B1 (en) * | 1998-09-01 | 2001-05-22 | Matsushita Electric Industrial Co., Ltd. | Motor with hydrodynamic bearing and heat sink device employing this motor |
US20030113045A1 (en) * | 2000-07-27 | 2003-06-19 | Hiroyasu Fujinaka | Bearing device and motor with the bearing device |
JP2003244886A (en) * | 2002-02-18 | 2003-08-29 | Nippon Densan Corp | Spindle motor and recording disc drive |
DE20218170U1 (en) * | 2002-07-15 | 2003-08-28 | Minebea Co., Ltd., Miyota, Kitasaku | Hydrodynamic bearing, especially for the spindle motor of a hard disk drive, has a design that ensures as small a power loss as possible, high bearing rigidity and a long service life |
Non-Patent Citations (2)
Title |
---|
JP 2001012458 A (abstract). In: Patent Abstracts of Japan [CD-ROM] * |
JP 2003247547 A (abstract). In: Patent Abstracts of Japan [CD-ROM] * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008062524A1 (en) * | 2008-12-16 | 2010-06-17 | Minebea Co., Ltd. | Fluid-dynamic bearing system for rotating spindle motor in hard disk storage drive, has inwardly directed collar fixed in free space under formation of slot, where slot connects axial section of bearing gap with radial section of gap |
DE102010056251A1 (en) | 2010-12-24 | 2012-06-28 | Minebea Co., Ltd. | Fluid bearing for spindle motor, has shaft that is rotatably mounted in relative to bearing bush by fluid dynamic radial bearing and hydrostatic thrust bearing about rotation axis |
DE102014006498A1 (en) | 2014-05-06 | 2015-11-12 | Minebea Co., Ltd. | Fluid dynamic storage system |
WO2018069017A1 (en) * | 2016-10-14 | 2018-04-19 | Zf Friedrichshafen Ag | Acoustic bridge |
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8100 | Publication of patent without earlier publication of application | ||
AF | Is addition to no. |
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Owner name: MINEBEA MITSUMI INC., JP Free format text: FORMER OWNER: MINEBEA CO., LTD., MIYOTA-MACHI, NAGANO-GUN, JP |
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Representative=s name: RIEBLING, PETER, DIPL.-ING. DR.-ING., DE |
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R071 | Expiry of right |