WO2005031945A1 - マイクロサーボモータ用回転子 - Google Patents

マイクロサーボモータ用回転子 Download PDF

Info

Publication number
WO2005031945A1
WO2005031945A1 PCT/JP2004/013352 JP2004013352W WO2005031945A1 WO 2005031945 A1 WO2005031945 A1 WO 2005031945A1 JP 2004013352 W JP2004013352 W JP 2004013352W WO 2005031945 A1 WO2005031945 A1 WO 2005031945A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
shaft
permanent magnet
micro
resin member
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.)
Ceased
Application number
PCT/JP2004/013352
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Shinichiro Mukai
Shojiro Mori
Mamoru Era
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
Yaskawa Electric Manufacturing Co 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 Yaskawa Electric Corp, Yaskawa Electric Manufacturing Co Ltd filed Critical Yaskawa Electric Corp
Publication of WO2005031945A1 publication Critical patent/WO2005031945A1/ja
Priority to US11/375,136 priority Critical patent/US20060152094A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Definitions

  • the present invention relates to a micro-servo motor used for an FA device, a precision machine, and the like, and particularly to a configuration of a rotor thereof.
  • FIG. 3 Conventionally, a rotor of a micro servo motor incorporated in an FA device, a precision machine, or the like is as shown in FIG. 3 (for example, described in Patent Document 1).
  • FIG. 3 is a side sectional view of a conventional rotor for a micro servo motor.
  • 11 is a shaft
  • 12 is a permanent magnet
  • 11a is a step
  • 13 is a plate
  • E is an edge B.
  • An arc-shaped permanent magnet 12 divided into a plurality of steps is axially positioned on a stepped portion 11a formed on the shaft 1 that also has a magnetic force.
  • the outer diameter of the plate 13 and the stepped portion 11a is determined by the force required to finish the permanent magnet 12 to a predetermined size by grinding after the permanent magnet 12 is bonded to the shaft 1.
  • the diameter is the same as the diameter.
  • Patent Document 1 Patent No. 3122712
  • the micro-servo motor is often used at high speed while rotating. Since the rotor of the conventional micro-servo motor has a metal plate mounted on a permanent magnet, the efficiency is increased due to an increase in mass. There was a problem of a decrease. In addition, when the plate 13 is mounted in an eccentric state with respect to the shaft 11, there is a problem that the unbalance increases and the like.
  • the outer diameter of the plate 13 and the step portion 11a is determined by the edge portion between the permanent magnet 12 and the plate 13 when the permanent magnet 12 is bonded to the shaft 11 and finished to the same diameter by grinding.
  • chipping and cracking occurred at the edge E between the permanent magnet 12 and the stepped portion 11a, which caused an increase in imbalance due to strength problems.
  • the present invention has been made to solve the above problems, and has as its object to provide a rotor for a micro-servo motor that can reduce the imbalance while reducing the weight of the rotor.
  • the invention of claim 1 is directed to a stator having a stator core for mounting a stator coil for forming a rotating magnetic field on an inner peripheral surface of the stator core, and a magnetic air gap between the stator and the stator. And a rotor provided with a plurality of arc-shaped permanent magnets on the outer periphery of a shaft, the rotor being opposed to the rotor via a shaft.
  • a molded resin member having an inclined side wall formed by filling a resin material between the outer peripheral surfaces of the shaft is provided.
  • a groove is provided on a surface of the shaft facing the molded resin member.
  • the inclined side wall formed by filling an epoxy resin material between the axial end surface of the permanent magnet and the outer peripheral surface of the shaft is provided. Since the molded resin member is arranged, when the permanent magnet is bonded to the shaft and finished by grinding, chipping or cracking may occur at the edge between the permanent magnet and the molded resin member. Further, since the outer diameter of the step portion of the shaft is smaller than the outer diameter of the permanent magnet, a problem in strength can be prevented. Further, the rotor can be reduced in weight, and the problem of imbalance can be solved.
  • the groove is provided on the surface of the shaft facing the molded resin member, the adhesive strength in the axial direction can be increased.
  • FIG. 1 is a side sectional view of a rotor for a micro servo motor showing an embodiment of the present invention.
  • FIG. 3 is a side sectional view of a conventional rotor for a micro servo motor. Explanation of reference numerals
  • FIG. 1 is a side sectional view of a rotor for a micro servo motor showing an embodiment of the present invention
  • FIG. 2 is a front sectional view of FIG.
  • 1 is a shaft
  • la is a step
  • lb is a groove
  • 2 is a permanent magnet
  • 3 is a molded resin member
  • 4 is a stator core
  • 5 is a stator coil
  • 6 is a frame
  • 7 is a bracket
  • 8, 9 is a bearing
  • E is an edge.
  • the outer diameter of the step portion la is smaller than the outer diameter of the permanent magnet 2.
  • the micro-servo motor includes a stator S in which a stator coil 5 for forming a rotating magnetic field is mounted on an inner peripheral surface of a stator core 4 fitted to a frame 6, and a magnetic gap between the stator S and the stator S.
  • a rotor R provided with a plurality of arc-shaped permanent magnets 2 on the outer periphery of the shaft 1 and opposed to each other.
  • the brackets 7 are provided at both ends of the frame 6 via bearings 8.9.
  • the rotor R is formed between the axial end surface of the permanent magnet 2 and the outer peripheral surface of the shaft 1 which also has a magnetic force.
  • the member 3 is arranged, and a groove lb is provided on the surface of the shaft 1 facing the molded resin member 3.
  • FIGS. 1 and 2 four permanent magnets 2 magnetized on the outer peripheral surface of the shaft 1 are positioned in the axial direction at the stepped portion la, and then bonded to form a cylindrical shape.
  • a room-temperature-curable epoxy resin material with a relatively high viscosity was applied, and finally filled with inclination.
  • the molded resin member 3 is formed. At this time, the molded resin member 3 completely covers the edge portion E of the permanent magnet 2 or the outer peripheral surface of the permanent magnet 2. Further, the molded resin member 3 may be formed by a mold and an injection molding machine.
  • the rotor R includes a molded resin member 3 having an inclined side wall 3a formed by filling an epoxy resin material between the axial end surface of the permanent magnet 2 and the outer peripheral surface of the shaft 1.
  • the permanent magnet 2 is bonded to the shaft 1 and finished by grinding, chipping or cracking occurs at the edge E between the permanent magnet 2 and the molded resin member 3
  • the outer diameter of the step portion la of the shaft is made smaller than the outer diameter of the permanent magnet 2, so that problems in strength can be prevented.
  • the rotor R can be lightened by this, and the problem of imbalance can be solved.
  • the groove is provided on the surface of the shaft 1 facing the molded resin member, the adhesive force in the axial direction can be increased.
  • the adhesive force between the permanent magnet 2 and the molded resin member 3 in the axial direction can be increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2004/013352 2003-09-19 2004-09-14 マイクロサーボモータ用回転子 Ceased WO2005031945A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/375,136 US20060152094A1 (en) 2003-09-19 2006-03-15 Rotor for micro-servomotor, and micro-servomotor equipped with said rotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003328662A JP4487173B2 (ja) 2003-09-19 2003-09-19 マイクロサーボモータ用回転子およびこの回転子を備えたマイクロサーポモータ
JP2003-328662 2003-09-19

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/375,136 Continuation-In-Part US20060152094A1 (en) 2003-09-19 2006-03-15 Rotor for micro-servomotor, and micro-servomotor equipped with said rotor

Publications (1)

Publication Number Publication Date
WO2005031945A1 true WO2005031945A1 (ja) 2005-04-07

Family

ID=34385948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/013352 Ceased WO2005031945A1 (ja) 2003-09-19 2004-09-14 マイクロサーボモータ用回転子

Country Status (3)

Country Link
US (1) US20060152094A1 (https=)
JP (1) JP4487173B2 (https=)
WO (1) WO2005031945A1 (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4969110B2 (ja) * 2006-01-31 2012-07-04 株式会社ジェイテクト トルク検出装置
DE102013215048A1 (de) * 2013-07-31 2015-02-05 Robert Bosch Gmbh Läufer für einen Elektromotor und Verfahren zum Herstellen des Läufers
KR102824287B1 (ko) * 2020-01-22 2025-06-24 엘지이노텍 주식회사 모터
GB2626582B (en) * 2023-01-27 2025-09-10 Dyson Technology Ltd A Rotor Assembly
KR200500055Y1 (ko) * 2024-05-21 2026-02-10 주식회사 에스 씨디 공진 소음을 개선한 bldc 모터용 스포크형 ipm 로터

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5091710U (https=) * 1973-12-24 1975-08-02
JPH11252837A (ja) * 1998-02-26 1999-09-17 Shibaura Mechatronics Corp ポンプ用モータ

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1323700A (en) * 1969-11-20 1973-07-18 Lucas Industries Ltd Starter motors for internal combustion engines
US4206379A (en) * 1976-12-22 1980-06-03 Citizen Watch Co., Ltd. Permanent magnet rotor assembly for electro-mechanical transducer
JPS58163255A (ja) * 1982-03-24 1983-09-28 Okuma Mach Works Ltd 永久磁石式同期モ−タの回転子
US4587450A (en) * 1984-01-06 1986-05-06 Sanyei Corporation Synchronous motor rotor
US4888507A (en) * 1988-10-27 1989-12-19 Timex Corporation Stepping motor rotor assembly for an electronic timepiece
JPH02241339A (ja) * 1989-03-14 1990-09-26 Hitachi Ltd ターボチャージヤ直結回転機用永久磁石回転子
US5627423A (en) * 1993-06-11 1997-05-06 Askoll S.P.A. Permanent-magnet rotor for electric motors and method of manufacturing the same
US5465020A (en) * 1994-01-07 1995-11-07 Tri-Tech, Inc. Integral shaft bearing and bobbin for electric motors
EP0733804B1 (en) * 1995-03-20 2002-12-18 Ebara Corporation Vacuum pump
US6265802B1 (en) * 1996-04-15 2001-07-24 Warner Electric Technology, Inc. Laminated rotor assembly and method for a dynamoelectric machine
EP1075073B1 (en) * 1998-04-23 2013-01-02 Citizen Holdings Co., Ltd. Rotor of small-sized motor
JP2000324769A (ja) * 1999-05-13 2000-11-24 Matsushita Electric Ind Co Ltd ステッピングモータ
JP2003199274A (ja) * 2001-12-25 2003-07-11 Hitachi Ltd 回転子とその製造法及び回転機
JP4279508B2 (ja) * 2002-05-08 2009-06-17 日本電産サーボ株式会社 防振モータの構造

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5091710U (https=) * 1973-12-24 1975-08-02
JPH11252837A (ja) * 1998-02-26 1999-09-17 Shibaura Mechatronics Corp ポンプ用モータ

Also Published As

Publication number Publication date
JP4487173B2 (ja) 2010-06-23
JP2005094979A (ja) 2005-04-07
US20060152094A1 (en) 2006-07-13

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