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WO2009025202A1 - Fluid bearing device - Google Patents

Fluid bearing device Download PDF

Info

Publication number
WO2009025202A1
WO2009025202A1 PCT/JP2008/064446 JP2008064446W WO2009025202A1 WO 2009025202 A1 WO2009025202 A1 WO 2009025202A1 JP 2008064446 W JP2008064446 W JP 2008064446W WO 2009025202 A1 WO2009025202 A1 WO 2009025202A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing device
fluid bearing
shaft
flange portion
shaft member
Prior art date
Application number
PCT/JP2008/064446
Other languages
French (fr)
Japanese (ja)
Inventor
Jun Hirade
Kimihiko Bito
Tetsuya Yamamoto
Original Assignee
Ntn Corporation
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
Priority claimed from JP2007224257A external-priority patent/JP2009058006A/en
Priority claimed from JP2008156740A external-priority patent/JP5274902B2/en
Application filed by Ntn Corporation filed Critical Ntn Corporation
Priority to US12/670,437 priority Critical patent/US8297844B2/en
Priority to CN200880102673.0A priority patent/CN101779047B/en
Publication of WO2009025202A1 publication Critical patent/WO2009025202A1/en

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar seams
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/02—Assembling sliding-contact 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/36—Material joints by welding

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Plasma & Fusion (AREA)
  • Sliding-Contact Bearings (AREA)
  • Laser Beam Processing (AREA)

Abstract

Intended is to make it possible to manufacture a highly precise and strong shaft member at a low cost. The shaft member (2) includes a shaft portion (21) and a flange portion (22) disposed at one end of the shaft portion (21). The flange portion (22) is formed into an annular shape, and the shaft portion (21) and the flange portion (22) are fixed by a welded portion (23), which is formed by irradiating the upper end of the inner circumference with a laser (35).
PCT/JP2008/064446 2007-08-20 2008-08-12 Fluid bearing device WO2009025202A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/670,437 US8297844B2 (en) 2007-08-20 2008-08-12 Fluid dynamic bearing device
CN200880102673.0A CN101779047B (en) 2007-08-20 2008-08-12 Fluid bearing device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2007213706 2007-08-20
JP2007-213706 2007-08-20
JP2007224257A JP2009058006A (en) 2007-08-30 2007-08-30 Shaft member for fluid bearing device
JP2007-224257 2007-08-30
JP2008-156740 2008-06-16
JP2008156740A JP5274902B2 (en) 2007-08-20 2008-06-16 Hydrodynamic bearing device

Publications (1)

Publication Number Publication Date
WO2009025202A1 true WO2009025202A1 (en) 2009-02-26

Family

ID=40378108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/064446 WO2009025202A1 (en) 2007-08-20 2008-08-12 Fluid bearing device

Country Status (1)

Country Link
WO (1) WO2009025202A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010236667A (en) * 2009-03-31 2010-10-21 Ntn Corp Fluid bearing device and manufacturing method for the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000324753A (en) * 1999-04-28 2000-11-24 Sankyo Seiki Mfg Co Ltd Spindle motor
JP2003056567A (en) * 2001-08-15 2003-02-26 Nippon Densan Corp Method of manufacturing shaft portion of dynamic pressure bearing motor
JP2004340368A (en) * 2003-04-22 2004-12-02 Nippon Densan Corp Hydrodynamic bearing and its manufacturing method, device for manufacturing shaft member for hydrodynamic bearing, spindle motor, and recording disc driving apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000324753A (en) * 1999-04-28 2000-11-24 Sankyo Seiki Mfg Co Ltd Spindle motor
JP2003056567A (en) * 2001-08-15 2003-02-26 Nippon Densan Corp Method of manufacturing shaft portion of dynamic pressure bearing motor
JP2004340368A (en) * 2003-04-22 2004-12-02 Nippon Densan Corp Hydrodynamic bearing and its manufacturing method, device for manufacturing shaft member for hydrodynamic bearing, spindle motor, and recording disc driving apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010236667A (en) * 2009-03-31 2010-10-21 Ntn Corp Fluid bearing device and manufacturing method for the same

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