JPS56157249A - Magnet rotor - Google Patents

Magnet rotor

Info

Publication number
JPS56157249A
JPS56157249A JP6057980A JP6057980A JPS56157249A JP S56157249 A JPS56157249 A JP S56157249A JP 6057980 A JP6057980 A JP 6057980A JP 6057980 A JP6057980 A JP 6057980A JP S56157249 A JPS56157249 A JP S56157249A
Authority
JP
Japan
Prior art keywords
magnet
bore
shaft
rotor
wedge effect
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
JP6057980A
Other languages
Japanese (ja)
Inventor
Masayuki Shizuka
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6057980A priority Critical patent/JPS56157249A/en
Publication of JPS56157249A publication Critical patent/JPS56157249A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PURPOSE:To obtain a magnet rotor which has a high reliability against a medicine or the like without deterioration with ageing by forming a taper at the bore on a part of the magnet and rigidly securing a shaft by the wedge effect caused by the thermal shrinkage of its molding material. CONSTITUTION:A tapered hole 1a having an angle of approx. 60 deg. is formed at one end of the bore of a cylindrical ferrite magnet 1, and a square recess 1b having a size larger than the diameter of the bore is formed at the other end of the bore of the magnet. A molding material 3 such as resin, low melting point metal or the like is filled between the bore and the rotor shaft 2. The material 3 is solidified by cooling, thereby mechanically securing between the magnet 1 and the shaft 2, but when it is returned to an ambient temperature, a minite gap is formed between the bore of the magnet and the shaft. Since the material 3 is pulled toward the recess 1b of the magnet 1 due to the axial shrinkage, the shaft is rigidly secured due to the planar pressure caused by the wedge effect at the tapered part 1a. Thus, the rotary force of the magnet 1 can be transmitted, and the radial displacement of the shaft core can be prevented.
JP6057980A 1980-05-09 1980-05-09 Magnet rotor Pending JPS56157249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6057980A JPS56157249A (en) 1980-05-09 1980-05-09 Magnet rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6057980A JPS56157249A (en) 1980-05-09 1980-05-09 Magnet rotor

Publications (1)

Publication Number Publication Date
JPS56157249A true JPS56157249A (en) 1981-12-04

Family

ID=13146291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6057980A Pending JPS56157249A (en) 1980-05-09 1980-05-09 Magnet rotor

Country Status (1)

Country Link
JP (1) JPS56157249A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100470U (en) * 1981-12-25 1983-07-08 松下電器産業株式会社 permanent magnet rotor
EP1156574A2 (en) * 2000-05-17 2001-11-21 Fujitsu General Limited Rotor of electric motor and method for manufacturing the same
EP1850453A1 (en) * 2006-04-28 2007-10-31 Bühler Motor GmbH Permanent magnet rotor
WO2009000599A1 (en) * 2007-06-27 2008-12-31 Robert Bosch Gmbh Rotor for an electric motor and electrical machine tool having an electric motor and a rotor
US20110089781A1 (en) * 2009-10-20 2011-04-21 Nidec Sankyo Corporation Rotor for motor and motor
US8004141B2 (en) 2005-04-29 2011-08-23 Sntech Inc. Two-phase brushless DC motor
US8033007B2 (en) 2007-05-11 2011-10-11 Sntech, Inc. Method of making rotor of brushless motor
US20110273037A1 (en) * 2010-05-10 2011-11-10 Makita Corporation Brushless dc motor
US8080907B2 (en) * 2007-10-25 2011-12-20 Young-Chun Jeung Rotor of brushless (BL) motor
CN102570664A (en) * 2012-01-19 2012-07-11 苏州正澳电器有限公司 Motor rotor and method for machining same
US8299661B2 (en) * 2007-05-11 2012-10-30 Sntech Inc. Rotor of brushless motor
CN106487137A (en) * 2015-08-26 2017-03-08 日立金属株式会社 Surface magnet revolving part
EP2662954A3 (en) * 2012-05-09 2017-11-22 LG Innotek Co., Ltd. Motor

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6316303Y2 (en) * 1981-12-25 1988-05-10
JPS58100470U (en) * 1981-12-25 1983-07-08 松下電器産業株式会社 permanent magnet rotor
EP1156574A2 (en) * 2000-05-17 2001-11-21 Fujitsu General Limited Rotor of electric motor and method for manufacturing the same
EP1156574A3 (en) * 2000-05-17 2004-01-02 Fujitsu General Limited Rotor of electric motor and method for manufacturing the same
US8004141B2 (en) 2005-04-29 2011-08-23 Sntech Inc. Two-phase brushless DC motor
EP1850453A1 (en) * 2006-04-28 2007-10-31 Bühler Motor GmbH Permanent magnet rotor
US8033007B2 (en) 2007-05-11 2011-10-11 Sntech, Inc. Method of making rotor of brushless motor
US8299661B2 (en) * 2007-05-11 2012-10-30 Sntech Inc. Rotor of brushless motor
WO2009000599A1 (en) * 2007-06-27 2008-12-31 Robert Bosch Gmbh Rotor for an electric motor and electrical machine tool having an electric motor and a rotor
US8080907B2 (en) * 2007-10-25 2011-12-20 Young-Chun Jeung Rotor of brushless (BL) motor
US20110089781A1 (en) * 2009-10-20 2011-04-21 Nidec Sankyo Corporation Rotor for motor and motor
US8450897B2 (en) * 2009-10-20 2013-05-28 Nidec Sankyo Corporation Rotor for motor and motor
US20110273037A1 (en) * 2010-05-10 2011-11-10 Makita Corporation Brushless dc motor
CN102570664A (en) * 2012-01-19 2012-07-11 苏州正澳电器有限公司 Motor rotor and method for machining same
EP2662954A3 (en) * 2012-05-09 2017-11-22 LG Innotek Co., Ltd. Motor
US9847690B2 (en) 2012-05-09 2017-12-19 Lg Innotek Co., Ltd. Motor having an insulator body with guide lugs for prevention of short-circuiting
US9941765B2 (en) 2012-05-09 2018-04-10 Lg Innotek Co., Ltd. Motor
CN106487137A (en) * 2015-08-26 2017-03-08 日立金属株式会社 Surface magnet revolving part

Similar Documents

Publication Publication Date Title
JPS56157249A (en) Magnet rotor
US4256986A (en) Magnetic pickup subassembly
EP0610562A1 (en) Excess temperature and start safety device in pumps comprising permanent magnetic clutches
GB1057339A (en) Rotatable shafting
CA2399069A1 (en) Injection molded threaded rotor and manufacture method
KR950009261A (en) Manufacturing method of rotation sensor and its structure
US4132970A (en) Potentiometer
US4241975A (en) Cast bus bar connector having hollow cross-sectional area
BR0205506A (en) Process of manufacturing a rotary electric machine rotor, and, rotary electric machine rotor
US2994273A (en) Projectile
JPS63274123A (en) Anisotropic ferrite magnet molded body
KR930006798Y1 (en) Structure for fixing radial type rotor to output shaft of synchronous motor
GB1120686A (en) Improvements in molded bearing assembly and method of making same
US3000310A (en) Fuse housing
JPS5924092Y2 (en) Pushing
JP2004208356A (en) Rotor structure
JPH0471351A (en) Manufacture of rotor for small-sized motor
GB1159205A (en) Electrical Insulating Bodies Incorporating Electrodes
JPS5638967A (en) Manufacture of shaft insulating rotor
JPS57126249A (en) Coreless armature
JPS5658188A (en) Manufacture of magnetic bubble memory module
JPS57116564A (en) Rotor for high speed rotary electric machine
JPS649312A (en) Rotation detector
JPS56120909A (en) Fluid-type self sustaining gyroscopic device
JPS53147911A (en) Preparing magnetic rotor