GB2363260A - Particle free shield assembly for spindle motor - Google Patents

Particle free shield assembly for spindle motor

Info

Publication number
GB2363260A
GB2363260A GB0119188A GB0119188A GB2363260A GB 2363260 A GB2363260 A GB 2363260A GB 0119188 A GB0119188 A GB 0119188A GB 0119188 A GB0119188 A GB 0119188A GB 2363260 A GB2363260 A GB 2363260A
Authority
GB
United Kingdom
Prior art keywords
shaft
shield
seal
press
pole pieces
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.)
Granted
Application number
GB0119188A
Other versions
GB0119188D0 (en
GB2363260B (en
Inventor
Robert Alan Nottingham
Jeffry Arnold Leblanc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of GB0119188D0 publication Critical patent/GB0119188D0/en
Publication of GB2363260A publication Critical patent/GB2363260A/en
Application granted granted Critical
Publication of GB2363260B publication Critical patent/GB2363260B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/762—Sealings of ball or roller bearings by means of a fluid
    • F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
    • F16C33/765—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap by a magnetic field
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/124—Sealing of shafts
    • 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

Abstract

In a motor having a fixed shaft and a ball bearing with inner and outer races mounted near one end of the shaft, a magnetic seal is provided which is supported from a seal support which is integrated with or adhesively attached to the back iron which rotates with the hub, the seal magnetic pole pieces extending around the shaft and holding ferrofluid between the ends of the pole pieces extending around the shaft and holding ferrofluid between the ends of the pole pieces and the shaft. A vacuum press holds the shield piece and heats the shield to a temperature so that the inner radius of the washer-shaped seal piece is larger than the outer diameter of the shaft. The press then lowers the shield over the outside diameter of the shaft; the shield is positioned by providing a positioning surface on the vacuum press which butts against the end of the shaft, with the vacuum holding portion of the press extending lower than this alignment surface to place the shield on the outside of the shaft. As the shield cools, it presses against the outside surface of the shaft and is fixed in place. The seal support includes a catcher recess which faces the shaft and is in a position to catch any stray metal particles.
GB0119188A 1999-01-29 2000-01-27 Particle free shield assembly for spindle motor Expired - Fee Related GB2363260B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11782299P 1999-01-29 1999-01-29
PCT/US2000/002402 WO2000045498A2 (en) 1999-01-29 2000-01-27 Particle free shield assembly for spindle motor

Publications (3)

Publication Number Publication Date
GB0119188D0 GB0119188D0 (en) 2001-09-26
GB2363260A true GB2363260A (en) 2001-12-12
GB2363260B GB2363260B (en) 2003-12-17

Family

ID=22375017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0119188A Expired - Fee Related GB2363260B (en) 1999-01-29 2000-01-27 Particle free shield assembly for spindle motor

Country Status (6)

Country Link
JP (1) JP2002536947A (en)
KR (1) KR100672182B1 (en)
DE (1) DE10083917T1 (en)
GB (1) GB2363260B (en)
HK (1) HK1042783B (en)
WO (1) WO2000045498A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013018223A1 (en) * 2013-10-30 2015-04-30 Minebea Co., Ltd. Spindle motor with a fluid dynamic bearing system
CN105952896B (en) * 2016-06-16 2018-07-31 广东省肇庆电机有限公司 It is a kind of to vacuumize mold for micromotor waterproof
US11095184B2 (en) 2016-08-23 2021-08-17 Lord Corporation Magnetic seal for magnetically-responsive devices, systems, and methods
JP7262182B2 (en) * 2018-05-31 2023-04-21 ミネベアミツミ株式会社 bearing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990141A (en) * 1975-03-03 1976-11-09 General Electric Company Methods of making dynamoelectric machine structures
US5303163A (en) * 1992-08-20 1994-04-12 Cummins Electronics Company Configurable vehicle monitoring system
US5617272A (en) * 1994-05-02 1997-04-01 Seagate Technology, Inc. Adhesiveless seal assembly incorporating magnetic seal for use with disc drive
US5841607A (en) * 1997-04-07 1998-11-24 Seagate Technology, Inc. Hydrodynamic seal for disc drive spindle motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5305163A (en) * 1990-12-31 1994-04-19 Seagate Technology, Inc. Stationary angularly aligned stationary spindle shaft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990141A (en) * 1975-03-03 1976-11-09 General Electric Company Methods of making dynamoelectric machine structures
US5303163A (en) * 1992-08-20 1994-04-12 Cummins Electronics Company Configurable vehicle monitoring system
US5617272A (en) * 1994-05-02 1997-04-01 Seagate Technology, Inc. Adhesiveless seal assembly incorporating magnetic seal for use with disc drive
US5841607A (en) * 1997-04-07 1998-11-24 Seagate Technology, Inc. Hydrodynamic seal for disc drive spindle motor

Also Published As

Publication number Publication date
WO2000045498A3 (en) 2000-11-23
HK1042783B (en) 2004-07-02
GB0119188D0 (en) 2001-09-26
HK1042783A1 (en) 2002-08-23
WO2000045498A2 (en) 2000-08-03
JP2002536947A (en) 2002-10-29
KR100672182B1 (en) 2007-01-19
GB2363260B (en) 2003-12-17
KR20010093289A (en) 2001-10-27
DE10083917T1 (en) 2001-12-13
WO2000045498A9 (en) 2001-10-11

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