JPH09233752A - Rotor provided with magnet of rotating electric machine - Google Patents

Rotor provided with magnet of rotating electric machine

Info

Publication number
JPH09233752A
JPH09233752A JP8039158A JP3915896A JPH09233752A JP H09233752 A JPH09233752 A JP H09233752A JP 8039158 A JP8039158 A JP 8039158A JP 3915896 A JP3915896 A JP 3915896A JP H09233752 A JPH09233752 A JP H09233752A
Authority
JP
Japan
Prior art keywords
magnet
shaft
disk
shrink
reinforcing cylinder
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.)
Granted
Application number
JP8039158A
Other languages
Japanese (ja)
Other versions
JP3598635B2 (en
Inventor
Hiroshi Harie
博史 針江
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP3915896A priority Critical patent/JP3598635B2/en
Publication of JPH09233752A publication Critical patent/JPH09233752A/en
Application granted granted Critical
Publication of JP3598635B2 publication Critical patent/JP3598635B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

PROBLEM TO BE SOLVED: To surely fix a magnet of low tensile strength to a shaft without cementing. SOLUTION: A magnet 2 is fitted to a shaft 1 by shrink fitting wherein initial interference is small. A reinforcing cylinder 14 is shrink-fitted to the outer periphery of the magnet 2. On the side surface of the magnet 2, a disk 15 for preventing rotation is fixed to the shaft 1 by a fixing means 16 like shrink fit. Protrusions 14a in the shaft direction of the reinforcing cylinder 14 are engaged with notches 15a on the circumference of the disk 15. The torque which is transferred from a stator to the magnet 2 is delivered to the shaft 1, via the engaging of the protrusions 14a of the cylinder 14 and the notches 15a of the disk 15 and the fixing means 16 of the disk 15 and the shaft 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【発明の属する技術分野】この発明は、回転電機の磁石
付回転子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor with a magnet for a rotary electric machine.

【従来の技術】図２に示す従来例の片側断面図におい
て、軸１に磁石２を接着剤３で固着してトルクに対向さ
せ、磁石２の外周に補強円筒４を焼嵌めして磁石２の遠
心力を保持する。2. Description of the Related Art In the one-sided sectional view of a conventional example shown in FIG. 2, a magnet 2 is fixed to a shaft 1 with an adhesive 3 so as to face a torque, and a reinforcing cylinder 4 is shrink-fitted to the outer periphery of the magnet 2 to make the magnet 2 Hold the centrifugal force of.

【発明が解決しようとする課題】前記の従来例では、接
着剤３を軸１と磁石２との間にむらなく塗布することが
困難で接着の信頼性が低い。また、接着が確実であって
も、運転中の温度差による熱膨張差や、回転中の磁石２
の遠心力による伸びにより接着剤３が剥離する恐れがあ
る。接着剤３に代えて、軸１に磁石２を焼嵌めすること
もあるが、磁石２は圧縮強度の割に引張り強度が低いの
で、焼嵌めの初期しめしろを大きくすることができなく
て、高速回転では磁石２の遠心力でしめしろが減少して
トルクに耐えない。この発明の課題は、接着によらない
で引張り強度の低い磁石を軸に確実に固着することがで
きる回転電機の磁石付回転子を提供することにある。In the above-mentioned conventional example, it is difficult to apply the adhesive 3 evenly between the shaft 1 and the magnet 2, and the adhesion reliability is low. Even if the adhesion is reliable, the difference in thermal expansion due to the temperature difference during operation and the rotating magnet 2
The adhesive 3 may be peeled off due to the elongation due to the centrifugal force. The magnet 2 may be shrink-fitted onto the shaft 1 instead of the adhesive 3, but since the magnet 2 has a low tensile strength relative to the compressive strength, it is not possible to increase the initial interference of shrink-fitting. At high speed rotation, the interference is reduced by the centrifugal force of the magnet 2 and the torque cannot be withstood. An object of the present invention is to provide a rotor with a magnet for a rotary electric machine that can securely fix a magnet having a low tensile strength to a shaft without using adhesion.

【課題を解決するための手段】この発明の回転電機の磁
石付回転子は、軸に嵌合した磁石の外周に補強円筒を焼
嵌めし、磁石の側面で軸に回り止め円板を固着手段で固
着し、補強円筒の軸方向の突起と回り止め円板の円周上
の切欠けとを係合させるものである。この発明の回転電
機の磁石付回転子によれば、固定子から磁石に伝わるト
ルクは、焼嵌めされる補強円筒と、補強円筒の突起と回
り止め円板の切欠けと、回り止め円板と軸との固着手段
とを経由して軸に伝達される。磁石は引張り強度の割に
圧縮強度が高いので補強円筒の大きな焼嵌めの初期しめ
しろに耐える。突起と切欠けの係合も確実である。回り
止め円板と軸との固着手段は、例えば焼嵌めであり、回
り止め円板は普通の高強度材料を使用できるので、大き
な焼嵌めの初期しめしろを与えることができる。焼嵌め
の固着手段に代えて、軸と回り止め円板との間のローレ
ット、キー、溶接などでもよい。According to the rotor with magnet of the rotating electric machine of the present invention, a reinforcing cylinder is shrink-fitted to the outer periphery of the magnet fitted to the shaft, and the rotation preventing disc is fixed to the shaft at the side surface of the magnet. The protrusions in the axial direction of the reinforcing cylinder are engaged with the notches on the circumference of the rotation preventing disc. According to the rotor with magnet of the rotating electric machine of the present invention, the torque transmitted from the stator to the magnet is generated by the reinforcing cylinder, the protrusion of the reinforcing cylinder, the notch of the rotation stopping disk, and the rotation stopping disk. It is transmitted to the shaft via the fixing means with the shaft. Since the magnet has a high compressive strength relative to its tensile strength, it can withstand the initial interference of a large shrink fit of a reinforced cylinder. Engagement of the projection and the notch is also reliable. The fixing means of the non-rotating disc and the shaft is, for example, a shrink fit, and since the non-rotating disc can use an ordinary high-strength material, it is possible to provide an initial interference of a large shrink fit. Instead of the fixing means for shrink fitting, knurls, keys, welding or the like between the shaft and the rotation-preventing disc may be used.

【発明の実施の形態】図１に示す実施例の回転図示断面
図を付記した片側断面図において、軸１に磁石２を嵌合
する。初期しめしろの小さい焼嵌めがよい。磁石２の外
周に補強円筒１４を焼嵌めする。磁石２の側面で軸１に
回り止め円板１５を固着手段１６で固着する。補強円筒
１４の軸方向の突起１４ａと回り止め円板１５の円周上
の切欠け１５ａとを係合させる。反対側の円板２０と補
強円筒１４とで係合させてもよい。この実施例によれ
ば、図示しない固定子から磁石２に伝わるトルクは、焼
嵌めされる補強円筒１４と、補強円筒１４の突起１４ａ
と回り止め円板１５の切欠け１５ａと、回り止め円板１
５と軸１との固着手段１６とを経由して軸１に伝達され
る。磁石２は引張り強度の割に圧縮強度が高いので補強
円筒１４の大きな焼嵌めの初期しめしろに耐える。突起
１４ａと切欠け１５ａの係合も確実である。回り止め円
板１５と軸１との固着手段１６は、例えば焼嵌めであ
り、回り止め円板１５は普通の高強度材料を使用できる
ので、大きな焼嵌めの初期しめしろを与えることができ
る。焼嵌めの固着手段１６に代えて、軸１と回り止め円
板１５との間のローレット、キー、溶接などでもよい。BEST MODE FOR CARRYING OUT THE INVENTION A magnet 2 is fitted to a shaft 1 in a one-sided sectional view with a rotating sectional view of the embodiment shown in FIG. Shrink fit with a small initial interference is good. The reinforcing cylinder 14 is shrink-fitted onto the outer circumference of the magnet 2. The rotation stopping disk 15 is fixed to the shaft 1 by the fixing means 16 on the side surface of the magnet 2. The axial projection 14a of the reinforcing cylinder 14 and the circumferential notch 15a of the rotation stopping disk 15 are engaged with each other. The disc 20 on the opposite side and the reinforcing cylinder 14 may be engaged with each other. According to this embodiment, the torque transmitted from the stator (not shown) to the magnet 2 is reinforced by the reinforcing cylinder 14 and the protrusion 14a of the reinforcing cylinder 14.
And the notch 15a of the rotation stopping disk 15 and the rotation stopping disk 1
5 and the fixing means 16 of the shaft 1 are transmitted to the shaft 1. Since the magnet 2 has a high compressive strength relative to the tensile strength, it can withstand the initial interference of a large shrink fit of the reinforcing cylinder 14. The engagement between the protrusion 14a and the notch 15a is also reliable. The fixing means 16 for fixing the whirl-stop disc 15 and the shaft 1 is, for example, a shrink fit, and since the whirl-stop disc 15 can use an ordinary high-strength material, it is possible to provide an initial interference of a large shrink fit. Instead of the shrink-fitting fixing means 16, a knurl, a key, welding or the like between the shaft 1 and the rotation stopping disk 15 may be used.

【発明の効果】この発明の回転電機の磁石付回転子によ
れば、補強円筒の突起と回り止め円板の切欠け及び回り
止め円板と軸との固着手段とにより、接着によらないで
引張り強度の低い磁石を軸に確実に固着することができ
るという効果がある。According to the rotor with magnet of the rotating electric machine of the present invention, the protrusion of the reinforcing cylinder, the notch of the detent disc and the fixing means of the detent disc and the shaft do not rely on adhesion. There is an effect that a magnet having a low tensile strength can be securely fixed to the shaft.

【図面の簡単な説明】[Brief description of drawings]

【図１】実施例の回転図示断面図を付記した片側断面図FIG. 1 is a one-sided cross-sectional view showing a rotation-illustrated cross-sectional view of an embodiment.

【図２】従来例の片側断面図FIG. 2 is a one-sided sectional view of a conventional example

【符号の説明】[Explanation of symbols]

１ 軸 ２ 磁石 １４ 補強円筒 １４ａ 突起 １５ 回り止め円板 １５ａ 切欠け １６ 固着手段 DESCRIPTION OF SYMBOLS 1 axis 2 magnet 14 reinforcement cylinder 14a protrusion 15 rotation stop disk 15a notch 16 fixing means

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】軸に嵌合した磁石の外周に補強円筒を焼嵌
めし、磁石の側面で軸に回り止め円板を固着手段で固着
し、補強円筒の軸方向の突起と回り止め円板の円周上の
切欠けとを係合させることを特徴とする回転電機の磁石
付回転子。1. A reinforcing cylinder is shrink-fitted to the outer circumference of a magnet fitted to a shaft, and a rotation stopping disk is fixed to the shaft at a side surface of the magnet by a fixing means, and an axial projection of the reinforcing cylinder and a rotation stopping disk. A rotor with a magnet for a rotary electric machine, characterized in that it engages with a notch on the circumference of the rotor.
JP3915896A 1996-02-27 1996-02-27 Rotor with rotating electric machine magnet Expired - Fee Related JP3598635B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3915896A JP3598635B2 (en) 1996-02-27 1996-02-27 Rotor with rotating electric machine magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3915896A JP3598635B2 (en) 1996-02-27 1996-02-27 Rotor with rotating electric machine magnet

Publications (2)

Publication Number Publication Date
JPH09233752A true JPH09233752A (en) 1997-09-05
JP3598635B2 JP3598635B2 (en) 2004-12-08

Family

ID=12545314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3915896A Expired - Fee Related JP3598635B2 (en) 1996-02-27 1996-02-27 Rotor with rotating electric machine magnet

Country Status (1)

Country Link
JP (1) JP3598635B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000278898A (en) * 1999-03-24 2000-10-06 Toshiba Corp Permanent magnet rotary electric machine
JP2008289221A (en) * 2007-05-15 2008-11-27 Mitsubishi Electric Corp Rotor of rotary electric machine
KR101382311B1 (en) * 2012-12-28 2014-04-08 주식회사 뉴로스 Rotor assembling method for electric turbo-charger
KR101382310B1 (en) * 2012-12-31 2014-04-08 주식회사 뉴로스 Rotor assembling method for electric turbo-charger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02133180U (en) * 1989-04-07 1990-11-05
JPH0374151A (en) * 1989-08-10 1991-03-28 Aichi Emerson Electric Co Ltd Permanent magnet type rotor
JPH06315245A (en) * 1993-04-27 1994-11-08 Japan Servo Co Ltd Permanent magnet rotor for canned motor pump
JPH07284237A (en) * 1994-04-06 1995-10-27 Fanuc Ltd Rotor of permanent magnet motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02133180U (en) * 1989-04-07 1990-11-05
JPH0374151A (en) * 1989-08-10 1991-03-28 Aichi Emerson Electric Co Ltd Permanent magnet type rotor
JPH06315245A (en) * 1993-04-27 1994-11-08 Japan Servo Co Ltd Permanent magnet rotor for canned motor pump
JPH07284237A (en) * 1994-04-06 1995-10-27 Fanuc Ltd Rotor of permanent magnet motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000278898A (en) * 1999-03-24 2000-10-06 Toshiba Corp Permanent magnet rotary electric machine
JP2008289221A (en) * 2007-05-15 2008-11-27 Mitsubishi Electric Corp Rotor of rotary electric machine
KR101382311B1 (en) * 2012-12-28 2014-04-08 주식회사 뉴로스 Rotor assembling method for electric turbo-charger
KR101382310B1 (en) * 2012-12-31 2014-04-08 주식회사 뉴로스 Rotor assembling method for electric turbo-charger

Also Published As

Publication number Publication date
JP3598635B2 (en) 2004-12-08

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