GB2298464B - A spindle unit having dynamic pressure bearings - Google Patents

A spindle unit having dynamic pressure bearings

Info

Publication number
GB2298464B
GB2298464B GB9603092A GB9603092A GB2298464B GB 2298464 B GB2298464 B GB 2298464B GB 9603092 A GB9603092 A GB 9603092A GB 9603092 A GB9603092 A GB 9603092A GB 2298464 B GB2298464 B GB 2298464B
Authority
GB
United Kingdom
Prior art keywords
shaft
bearing
dynamic pressure
spindle unit
pressure bearings
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 - Fee Related
Application number
GB9603092A
Other versions
GB9603092D0 (en
GB2298464A (en
GB2298464A8 (en
Inventor
Takeshi Takahashi
Takashi Honda
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.)
Koyo Seiko Co Ltd
TDK Corp
Original Assignee
Koyo Seiko Co Ltd
TDK Corp
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 Koyo Seiko Co Ltd, TDK Corp filed Critical Koyo Seiko Co Ltd
Publication of GB9603092D0 publication Critical patent/GB9603092D0/en
Publication of GB2298464A publication Critical patent/GB2298464A/en
Publication of GB2298464A8 publication Critical patent/GB2298464A8/en
Application granted granted Critical
Publication of GB2298464B publication Critical patent/GB2298464B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F16C17/10—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
    • 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
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1677—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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

A compact spindle unit for a hard disk drive comprises a vertical shaft 1 fixed to a motor base 10 which also carries a stator coil 20. A cap-shaped hub 3 carrying a magnet 30 rotates about the shaft and is supported by a radial bearing R1 and a thrust bearing S1. The thrust bearing is constituted by a part 3b integral with the hub and either a flange 2 mounted on the shaft or an end surface of the shaft itself. At least one bearing surface 1d-1, 1d-2, 2a of each bearing is provided with dynamic pressure generating grooves.
GB9603092A 1995-02-15 1996-02-14 A spindle unit having dynamic pressure bearings Expired - Fee Related GB2298464B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2666895A JPH08221896A (en) 1995-02-15 1995-02-15 Spindle unit

Publications (4)

Publication Number Publication Date
GB9603092D0 GB9603092D0 (en) 1996-04-10
GB2298464A GB2298464A (en) 1996-09-04
GB2298464A8 GB2298464A8 (en) 1998-10-07
GB2298464B true GB2298464B (en) 1998-11-11

Family

ID=12199792

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9603092A Expired - Fee Related GB2298464B (en) 1995-02-15 1996-02-14 A spindle unit having dynamic pressure bearings

Country Status (2)

Country Link
JP (1) JPH08221896A (en)
GB (1) GB2298464B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0937513A (en) * 1995-07-20 1997-02-07 Koyo Seiko Co Ltd Spindle motor
JPH0932850A (en) * 1995-07-20 1997-02-04 Koyo Seiko Co Ltd Dynamic pressure bearing device
JP3652875B2 (en) * 1998-03-26 2005-05-25 日本電産株式会社 motor
JPH11273235A (en) * 1998-03-26 1999-10-08 Matsushita Electric Ind Co Ltd Motor and hard disk device mounting the same
GB2335710A (en) * 1998-03-27 1999-09-29 Aisin Seiki Hybrid turbocharger with air bearings
JP2001206677A (en) * 2000-01-26 2001-07-31 Kawasaki Kogyo Kk Screw jack
JP2002233100A (en) * 2001-01-31 2002-08-16 Minebea Co Ltd Spindle motor and bearing assembly
KR100499170B1 (en) * 2003-01-09 2005-07-01 삼성전기주식회사 Kinetic Pressure Bearing Motor
US7956499B2 (en) 2005-06-02 2011-06-07 Seagate Technology Llc Motor magnetic force attenuator
JP2012257428A (en) * 2011-06-10 2012-12-27 Nippon Densan Corp Motor and disk drive

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445793A (en) * 1981-09-18 1984-05-01 Matsushita Electric Industrial Co., Ltd. Bearing
US5370463A (en) * 1990-11-13 1994-12-06 Matsushita Electric Industrial Co., Ltd. Hydrodynamic gas bearing
US5433529A (en) * 1994-08-02 1995-07-18 Synektron Corporation Fluid bearing construction employing thrust plate with pressure compensation ports

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445793A (en) * 1981-09-18 1984-05-01 Matsushita Electric Industrial Co., Ltd. Bearing
US5370463A (en) * 1990-11-13 1994-12-06 Matsushita Electric Industrial Co., Ltd. Hydrodynamic gas bearing
US5433529A (en) * 1994-08-02 1995-07-18 Synektron Corporation Fluid bearing construction employing thrust plate with pressure compensation ports

Also Published As

Publication number Publication date
JPH08221896A (en) 1996-08-30
GB9603092D0 (en) 1996-04-10
GB2298464A (en) 1996-09-04
GB2298464A8 (en) 1998-10-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20130214