JPS6479413A - Bearing device - Google Patents

Bearing device

Info

Publication number
JPS6479413A
JPS6479413A JP62233382A JP23338287A JPS6479413A JP S6479413 A JPS6479413 A JP S6479413A JP 62233382 A JP62233382 A JP 62233382A JP 23338287 A JP23338287 A JP 23338287A JP S6479413 A JPS6479413 A JP S6479413A
Authority
JP
Japan
Prior art keywords
magnet member
ball bearing
shaft
magnetized
consequently
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.)
Pending
Application number
JP62233382A
Other languages
Japanese (ja)
Inventor
Tatsuzo Ujo
Shoichi Ibaraki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP62233382A priority Critical patent/JPS6479413A/en
Publication of JPS6479413A publication Critical patent/JPS6479413A/en
Pending 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
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/086—Ball or roller bearings self-adjusting with magnetic means to preload 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
    • F16C39/00—Relieving load on bearings
    • F16C39/06—Relieving load on bearings using magnetic means
    • F16C39/063—Permanent magnets
    • 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

PURPOSE:To narrow a bearing space as well as to reduce the thickness and size of the whole body by applying preload to a ball bearing with resiliency of a magnet member, installing a conductive magnetic fluid in a between the magnet member and a shaft, and securing electric conductivity of a housing and the shaft. CONSTITUTION:Ring seat type magnet members 5, 5 magnetized in the axial direction are built in both opposite ends of ball bearings 3, 4, and magnetic poles on the opposed surfaces are made into the same magnetic pole. Consequently, these poles produce resiliency to each other, acting on an outer ring, thus preload can be applied to both ball bearing 3, 4. A magnetic path to be magnetized in the radial direction and shown in a dotted line is formed even in an inner circumference of the magnet member 5 being opposed to a turning shaft 1, and thereby a conductive magnetic fluid 17 is holdable in a clearance. Consequently, a bearing space can be sharply narrowed as compared with such one as using the conventional coil spring. In addition, there is unnecessary to install a contact earth, and since a conductive structure is constituted in respective insides of these ball bearing 3, 4, the whole device is thinned and miniaturized and, whet is more, its durability is improvable.
JP62233382A 1987-09-17 1987-09-17 Bearing device Pending JPS6479413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233382A JPS6479413A (en) 1987-09-17 1987-09-17 Bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233382A JPS6479413A (en) 1987-09-17 1987-09-17 Bearing device

Publications (1)

Publication Number Publication Date
JPS6479413A true JPS6479413A (en) 1989-03-24

Family

ID=16954222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233382A Pending JPS6479413A (en) 1987-09-17 1987-09-17 Bearing device

Country Status (1)

Country Link
JP (1) JPS6479413A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132358U (en) * 1989-03-31 1990-11-02
JPH06124533A (en) * 1992-10-12 1994-05-06 Sankyo Seiki Mfg Co Ltd Magnetic disk driving motor
US6898052B1 (en) * 2002-07-31 2005-05-24 Western Digital Technologies, Inc. Spindle motor including magnetic element for pre-loading a ball bearing set
CN105954032A (en) * 2016-05-24 2016-09-21 上海交通大学 Test system and method for magnetic liquid lubricated floating-ring bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132358U (en) * 1989-03-31 1990-11-02
JPH06124533A (en) * 1992-10-12 1994-05-06 Sankyo Seiki Mfg Co Ltd Magnetic disk driving motor
US6898052B1 (en) * 2002-07-31 2005-05-24 Western Digital Technologies, Inc. Spindle motor including magnetic element for pre-loading a ball bearing set
CN105954032A (en) * 2016-05-24 2016-09-21 上海交通大学 Test system and method for magnetic liquid lubricated floating-ring bearing

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