JPS55139051A - Motor - Google Patents

Motor

Info

Publication number
JPS55139051A
JPS55139051A JP4561179A JP4561179A JPS55139051A JP S55139051 A JPS55139051 A JP S55139051A JP 4561179 A JP4561179 A JP 4561179A JP 4561179 A JP4561179 A JP 4561179A JP S55139051 A JPS55139051 A JP S55139051A
Authority
JP
Japan
Prior art keywords
rotor
central part
case
gas bearing
spiral groove
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
JP4561179A
Other languages
Japanese (ja)
Inventor
Sukeo Ito
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP4561179A priority Critical patent/JPS55139051A/en
Publication of JPS55139051A publication Critical patent/JPS55139051A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor

Abstract

PURPOSE:To apply a gas bearing to a motor, which turns at relatively low speed, without an air-pump by providing a spiral groove to the outer circumference of the rotor and by making it act as a dynamic pressure gas bearing. CONSTITUTION:To rotor 2 with a rotor yoke that consists of the magnet 3, inner and outer magnetic paths 2a, 2b is attached to the motor shaft 1, which is auxiliarily supported by the magnetic bearing 6 mounted on the central part of the upper case, the motor shaft is further supported at the central part of the surface of the case 7 in the direction of the thrust. Many spiral grooves 13 are formed on the outer circumferential face A of the outer magnetic path 2b of the rotor yoke from the upper and lower sides to the central part of the rotor in the direction opposite to the rotation direction of the rotor 2 to make up a journal gas bearing. Also other spiral grooves 14 of the same pitch as the said spiral groove 13 are provided to the upper and lower end faces B, C of the rotor 2 to introduce air from the small holes 8 drilled in both the case 7 and the upper case 11 into the rotor side along the spiral groove 14.
JP4561179A 1979-04-13 1979-04-13 Motor Pending JPS55139051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4561179A JPS55139051A (en) 1979-04-13 1979-04-13 Motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4561179A JPS55139051A (en) 1979-04-13 1979-04-13 Motor

Publications (1)

Publication Number Publication Date
JPS55139051A true JPS55139051A (en) 1980-10-30

Family

ID=12724159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4561179A Pending JPS55139051A (en) 1979-04-13 1979-04-13 Motor

Country Status (1)

Country Link
JP (1) JPS55139051A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158853U (en) * 1984-09-20 1986-04-21
JPS6223344A (en) * 1985-07-19 1987-01-31 Ntn Toyo Bearing Co Ltd Spindle device
JPH0327747A (en) * 1990-05-14 1991-02-06 Sankyo Seiki Mfg Co Ltd Rotational driving gear for polygon mirror
JPH03101154U (en) * 1990-01-30 1991-10-22
EP0520019A1 (en) * 1990-03-16 1992-12-30 IDE, Russell D. Low-profile disk drive motor
JPH05300690A (en) * 1991-10-14 1993-11-12 Sankyo Seiki Mfg Co Ltd Driving device for rotation of polygon mirror
EP0964500A2 (en) * 1998-06-09 1999-12-15 Fanuc Ltd Pneumatic bearing motor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158853U (en) * 1984-09-20 1986-04-21
JPS6223344A (en) * 1985-07-19 1987-01-31 Ntn Toyo Bearing Co Ltd Spindle device
JPH03101154U (en) * 1990-01-30 1991-10-22
EP0520019A1 (en) * 1990-03-16 1992-12-30 IDE, Russell D. Low-profile disk drive motor
JPH0327747A (en) * 1990-05-14 1991-02-06 Sankyo Seiki Mfg Co Ltd Rotational driving gear for polygon mirror
JPH05300690A (en) * 1991-10-14 1993-11-12 Sankyo Seiki Mfg Co Ltd Driving device for rotation of polygon mirror
JPH0785634B2 (en) * 1991-10-14 1995-09-13 株式会社三協精機製作所 Rotation drive device for polygon mirror
EP0964500A2 (en) * 1998-06-09 1999-12-15 Fanuc Ltd Pneumatic bearing motor
EP0964500A3 (en) * 1998-06-09 2002-02-13 Fanuc Ltd Pneumatic bearing motor

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