JP2000078787A - Rotor of electric motor - Google Patents

Rotor of electric motor

Info

Publication number
JP2000078787A
JP2000078787A JP10243122A JP24312298A JP2000078787A JP 2000078787 A JP2000078787 A JP 2000078787A JP 10243122 A JP10243122 A JP 10243122A JP 24312298 A JP24312298 A JP 24312298A JP 2000078787 A JP2000078787 A JP 2000078787A
Authority
JP
Japan
Prior art keywords
rotor
magnet
rotor yoke
resin
yoke
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
JP10243122A
Other languages
Japanese (ja)
Other versions
JP3309811B2 (en
Inventor
Masahiko Morizaki
昌彦 森崎
Mototeru Kondo
元輝 近藤
Takahiro Kotani
敬博 小谷
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP24312298A priority Critical patent/JP3309811B2/en
Publication of JP2000078787A publication Critical patent/JP2000078787A/en
Application granted granted Critical
Publication of JP3309811B2 publication Critical patent/JP3309811B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve the productivity and reliability of the rotor of an electric motor when an output shaft and a rotor yoke are insulated. SOLUTION: The rotor of an electric motor is made up of a magnet 3, a rotor yoke 2, an output transmitting part 5 positioned inside this rotor yoke 2, and an insulating resin part 4 which encases the rotor yoke 2 and output transmitting part 5 to be connected to each other and fixes the magnet 3 to the outside circumference of the rotor yoke 2. The magnet and output transmitting part are fixed by resin molding to make it easy to assemble the rotor.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は電動機の回転子に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor rotor.

【0002】[0002]

【従来の技術】図4は従来の電動機のロータ構成の一例
である。1はステータヨーク、2はロータヨーク、3は
マグネット、4はロータヨークと出力軸の絶縁を目的と
した絶縁物、5は出力伝達部、7はロータの位置検出を
目的としたセンサ、9はマグネットを固定するパイプで
ある。
2. Description of the Related Art FIG. 4 shows an example of a rotor configuration of a conventional motor. 1 is a stator yoke, 2 is a rotor yoke, 3 is a magnet, 4 is an insulator for insulating the rotor yoke from the output shaft, 5 is an output transmission unit, 7 is a sensor for detecting the position of the rotor, and 9 is a magnet. It is a pipe to be fixed.

【0003】従来の構成においては、マグネットをロー
タヨークに接着したり、マグネツトの保護と飛散防止の
ため後工程でパイプを焼きばめするといった製造方法を
取らなければならない。また、出力軸と、ロータヨーク
を絶縁する場合においては、この両者の間にルミラーな
どの絶縁物を挟み込む方法を取っていた。
In the conventional configuration, a manufacturing method must be adopted in which a magnet is bonded to a rotor yoke, and a pipe is shrink-fitted in a later process to protect the magnet and prevent scattering. In the case where the output shaft and the rotor yoke are insulated, a method of interposing an insulator such as a lumirror between the two has been adopted.

【0004】[0004]

【発明が解決しようとする課題】上記従来の構成におい
ては、マグネットをロータヨークに接着したり、マグネ
ットの保護と飛散防止のため後工程でパイプを焼きばめ
するといった製造方法を取らなければならないため、非
常に工数がかかる。また、出力軸と、ロータヨークを絶
縁する場合においては、この両者の間にルミラーなどの
絶縁物を挟み込むといった工数が更に必要となる。そし
て、このように絶縁物を挟み込む場合には出力軸とロー
タヨークとの固定強度が低くなり信頼性の低下を招く可
能性がある。
In the above-mentioned conventional construction, it is necessary to adopt a manufacturing method in which a magnet is bonded to a rotor yoke, or a pipe is shrink-fitted in a later process for protecting the magnet and preventing scattering. It takes a lot of time. In the case where the output shaft and the rotor yoke are insulated from each other, additional steps such as inserting an insulator such as a lumirror between them are required. When the insulator is sandwiched in this way, the fixing strength between the output shaft and the rotor yoke is reduced, which may cause a reduction in reliability.

【0005】本発明は、出力軸と、ロータヨークを絶縁
する場合において、電動機のロータの生産性ならびに信
頼性を向上することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to improve the productivity and reliability of a motor rotor when insulating an output shaft from a rotor yoke.

【0006】[0006]

【課題を解決するための手段】この課題を解決するため
に本願発明は、マグネットと、ロータヨークと、このロ
ータヨークの内側に位置する出力伝達部と、一体成形に
より前記ロータヨーク及び前記出力伝達部を連結し、且
つ前記マグネットを前記ロータヨーク外周に固定した絶
縁性を有する樹脂部とから成る電動機のロータであり、
樹脂モールドによりマグネット及び出力伝達部を固定
し、ロータの組立を容易にした。
SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to a magnet, a rotor yoke, an output transmitting portion located inside the rotor yoke, and connecting the rotor yoke and the output transmitting portion by integral molding. And an insulative resin portion in which the magnet is fixed to the outer periphery of the rotor yoke.
The magnet and the output transmission section were fixed by resin molding, and assembly of the rotor was facilitated.

【0007】[0007]

【発明の実施の形態】本願発明はマグネットと、ロータ
ヨークと、このロータヨークの内側に位置する出力伝達
部と、一体成形により前記ロータヨーク及び前記出力伝
達部を連結し、且つ前記マグネットを前記ロータヨーク
外周に固定した絶縁性を有する樹脂部とから成る電動機
のロータであり、各ロータ部品の連結、固定を樹脂部に
より行うことにより、構成部材が簡略化された。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a magnet, a rotor yoke, an output transmission portion located inside the rotor yoke, and the rotor yoke and the output transmission portion connected by integral molding, and the magnet is attached to the outer periphery of the rotor yoke. The rotor of the electric motor is composed of a fixed resin part having insulating properties, and the components are simplified by connecting and fixing each rotor part by the resin part.

【0008】更に、出力伝達部とロータヨークとの間隔
を均一にすることで、出力伝達部に対し、ロータ回転
時、回転方向の応力集中が発生しない。
Further, by making the interval between the output transmitting portion and the rotor yoke uniform, stress concentration in the rotating direction does not occur in the output transmitting portion when the rotor rotates.

【0009】更に、偏肉マグネットを使用し、この偏肉
マグネットのラジアル方向の樹脂の厚みを不均一にする
ことにより、ロータの外径は真円のままで機械的ギャッ
プを均一に保つことができる。
Furthermore, by using an uneven thickness magnet and making the thickness of the resin in the radial direction of the uneven thickness magnet non-uniform, the mechanical gap can be kept uniform while the outer diameter of the rotor remains a perfect circle. it can.

【0010】また、本願発明は金型の中芯によりロータ
ヨーク内径を支持し、マグネット、ロータヨーク、及び
出力伝達部を樹脂により一体成形した電動機ロータの製
造方法である。
Further, the present invention is a method of manufacturing a motor rotor in which the inner diameter of a rotor yoke is supported by the center of a mold, and a magnet, a rotor yoke, and an output transmitting portion are integrally formed of resin.

【0011】更に、金型に突起部を設け、この突起部間
にマグネットを挿入して樹脂により一体成形してもよ
い。
Further, a projection may be provided on the mold, and a magnet may be inserted between the projections to integrally mold the resin.

【0012】[0012]

【実施例】図1は本発明において、ロータの各部品の配
置を示したものであり、図2は本発明の電動機のロータ
縦断面図、図3はマグネットの位置決めの状態を示して
いる。
FIG. 1 shows the arrangement of components of a rotor in the present invention, FIG. 2 shows a longitudinal sectional view of a rotor of an electric motor of the present invention, and FIG. 3 shows a state of positioning a magnet.

【0013】本発明の電動機のロータは偏肉仕様のマグ
ネット3と、このマグネット3を支持するロータヨーク
2と、このロータヨーク2の内側に位置する出力伝達部
5と、一体成形によりロータヨーク2及び出力伝達部5
を連結し、且つマグネット3をロータヨーク2外周に固
定する絶縁性を有する樹脂部4から成る。
The rotor of the electric motor according to the present invention has a magnet 3 of uneven thickness specification, a rotor yoke 2 for supporting the magnet 3, an output transmission portion 5 located inside the rotor yoke 2, and a rotor yoke 2 and an output transmission by integral molding. Part 5
And a resin portion 4 having an insulating property for fixing the magnet 3 to the outer periphery of the rotor yoke 2.

【0014】更に詳しく説明すると、筒状部と、この筒
状部の端部からロータ中心に突出した端面部とからなる
ロータヨーク2の筒状部外側に、マグネット3を接して
支持する。更に、このマグネット3の外側を樹脂で覆
い、マグネット3を固定する。この時、ロータコアの外
周形状が円状となるように成形しているため、ロータヨ
ーク2の外側、マグネット3の外側の樹脂の厚みは不均
一となっている。なお、マグネット3の側部にはマグネ
ット位置決め溝6があり、この溝は樹脂部4を一体成形
する時に、マグネット3を固定するために用いた突起部
の形状である。
More specifically, the magnet 3 is in contact with and supported on the outside of the cylindrical portion of the rotor yoke 2 composed of the cylindrical portion and an end surface protruding from the end of the cylindrical portion toward the center of the rotor. Further, the outside of the magnet 3 is covered with a resin, and the magnet 3 is fixed. At this time, since the outer shape of the rotor core is formed to be circular, the thickness of the resin outside the rotor yoke 2 and the outside of the magnet 3 is not uniform. A magnet positioning groove 6 is provided on a side portion of the magnet 3, and the groove has a shape of a protrusion used for fixing the magnet 3 when the resin portion 4 is integrally formed.

【0015】このロータヨーク2と出力伝達部5の間は
樹脂部4により連結している。このように、ロータヨー
ク2と出力伝達部5の間を絶縁性を有する樹脂部4によ
り連結することで、ロータヨーク2と出力伝達部5の絶
縁を容易に行うことができる。なお、出力伝達部5の形
状は円弧外周の数箇所に突出部を設けた形状であり、こ
の出力伝達部5の外周形状に合せ、ロータヨーク5の端
面部の形状は、出力伝達部5の突出部に対向する部分で
凹んだ形状となっている。そして、このロータヨーク端
面部と出力伝達部5の外周との間隔8は均一である。こ
のような構成とすることで、出力伝達部に対し、ロータ
回転時、回転方向の応力集中が発生しないようにしてい
る。なお、出力伝達部5と、この出力伝達部5の形状に
合せたステータヨークとの樹脂部4の厚み8は均一に保
たれた構成となっている。
The rotor yoke 2 and the output transmitting section 5 are connected by a resin section 4. As described above, by connecting the rotor yoke 2 and the output transmission unit 5 with the resin portion 4 having an insulating property, the insulation between the rotor yoke 2 and the output transmission unit 5 can be easily performed. The shape of the output transmitting portion 5 is a shape in which protruding portions are provided at several places on the outer periphery of the circular arc, and the shape of the end face portion of the rotor yoke 5 is adjusted to match the outer peripheral shape of the output transmitting portion 5. It has a concave shape at the part facing the part. The distance 8 between the end face of the rotor yoke and the outer periphery of the output transmitting section 5 is uniform. With such a configuration, stress concentration in the rotation direction does not occur in the output transmission unit when the rotor rotates. The thickness 8 of the resin portion 4 of the output transmitting portion 5 and the stator yoke conforming to the shape of the output transmitting portion 5 is configured to be uniform.

【0016】このような電動機ロータの外側にステータ
ヨーク1、ロータヨーク5の側面部上部に位置検出セン
サ7を設け、電動機を得る。
A stator yoke 1 is provided outside such a motor rotor, and a position detecting sensor 7 is provided above a side portion of the rotor yoke 5 to obtain a motor.

【0017】なお、マグネット3を覆う樹脂部と、ロー
タヨーク2、出力伝達部5間の樹脂部は一体成形された
樹脂部4である。また、本実施例の出力伝達部5は平板
であるが、ロータ長さより長い棒状の出力軸であっても
よい。
The resin portion covering the magnet 3 and the resin portion between the rotor yoke 2 and the output transmitting portion 5 are a resin portion 4 which is integrally formed. Further, the output transmission unit 5 of the present embodiment is a flat plate, but may be a rod-shaped output shaft longer than the length of the rotor.

【0018】次に、この電動機ロータの製造方法を説明
する。まず、金型の中芯によりロータヨーク内径を支持
し、マグネット3、ロータヨーク2、及び出力伝達部を
配置した後、金型に樹脂を流し込み、樹脂モールドした
電動機ロータを得る。樹脂モールド時、金型に突起部を
設け、この突起部間にマグネットを挿入固定すること
で、マグネットの回転方向に位置決めを正確に行うこと
ができる。この時の突起部により、マグネット位置決め
溝6が残る。
Next, a method for manufacturing the motor rotor will be described. First, the inner diameter of the rotor yoke is supported by the center of the mold, and after the magnet 3, the rotor yoke 2, and the output transmission section are arranged, resin is poured into the mold to obtain a resin-molded motor rotor. At the time of resin molding, a projection is provided on a mold, and a magnet is inserted and fixed between the projections, whereby positioning in the rotation direction of the magnet can be performed accurately. The projections at this time leave the magnet positioning groove 6.

【0019】なお、一体成形時に金型の中芯によりロー
タヨーク2の内径を支持することにより、ロータヨーク
2、マグネット外形、ロータ外形の真円度、同軸度を精
度良く仕上げる構成となっており、結果的にロータ内径
にロータヨークが露出する。
By supporting the inner diameter of the rotor yoke 2 with the center of the mold during the integral molding, the roundness and coaxiality of the rotor yoke 2, the magnet outer shape, and the rotor outer shape are accurately finished. The rotor yoke is exposed to the inner diameter of the rotor.

【0020】更に、一体成形時にマグネットの回転方向
へのずれを防止するため、金型にマグネット間に挿入さ
れる突起を出しておくことにより、マグネット位置決め
溝6が成形後、残る構成となっている。
Further, in order to prevent the magnet from being displaced in the rotating direction during the integral molding, a projection inserted between the magnets is provided in the mold so that the magnet positioning groove 6 remains after the molding. I have.

【0021】なお、本願の電動機のロータ外周は樹脂材
料により形成されているために、偏肉仕様のマグネット
3を使用した場合、ロータ外周とマグネット間の樹脂の
厚みを不均一とすることでロータ外形は真円とすること
ができ、機械的ギャップを均一に保つことができる。
Since the outer periphery of the rotor of the electric motor of the present application is formed of a resin material, when a magnet 3 having a non-uniform thickness is used, the thickness of the resin between the outer periphery of the rotor and the magnet is made non-uniform. The outer shape can be a perfect circle, and the mechanical gap can be kept uniform.

【0022】[0022]

【発明の効果】請求項1記載の発明は、各部品を一体成
形することにより生産性を向上することができ、出力伝
達部とローターヨークを絶縁する場合においても、信頼
性を向上することができる。
According to the first aspect of the present invention, the productivity can be improved by integrally molding the parts, and the reliability can be improved even when the output transmitting portion and the rotor yoke are insulated. it can.

【0023】請求項2記載の発明は、ロータヨークと出
力伝達部の間隔を均一とすることで、ロータ回転時、回
転方向の応力集中が発生を抑えることができる。
According to the second aspect of the present invention, by making the distance between the rotor yoke and the output transmitting portion uniform, it is possible to suppress the occurrence of stress concentration in the rotating direction during the rotation of the rotor.

【0024】請求項3記載の発明は偏肉仕様のマグネッ
トを使用した場合もロータの外径は真円のままで機械的
ギャップを均一に保つことができ、マグネットの形状に
合せた金型も不要となる。
According to the third aspect of the present invention, even when a magnet with an uneven thickness specification is used, the outer diameter of the rotor can be kept as a perfect circle and the mechanical gap can be kept uniform. It becomes unnecessary.

【0025】請求項4、5記載の発明は、各部品の位置
決めを正確に行うことができる。
According to the fourth and fifth aspects of the present invention, it is possible to accurately position each component.

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

【図1】本願実施例における一体成形前のロータの各部
品の配置を示す図
FIG. 1 is a diagram showing an arrangement of parts of a rotor before integral molding according to an embodiment of the present invention.

【図2】同電動機のロータの縦断面図FIG. 2 is a longitudinal sectional view of a rotor of the motor.

【図3】同マグネットの位置決めを示す図FIG. 3 is a diagram showing positioning of the magnet.

【図4】従来の電動機ロータ構成を示す図FIG. 4 is a diagram showing a configuration of a conventional motor rotor.

【符号の説明】[Explanation of symbols]

1 ステータヨーク 2 ロータヨーク 3 マグネット 4 樹脂部 5 出力伝達部 6 マグネット位置決め溝 DESCRIPTION OF SYMBOLS 1 Stator yoke 2 Rotor yoke 3 Magnet 4 Resin part 5 Output transmission part 6 Magnet positioning groove

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小谷 敬博 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Fターム(参考) 5H002 AA07 AB05 AC07 AE08 5H622 CA02 CA05 CA10 CA13 CB04 PP03 PP20  ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Takahiro Kotani 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5H002 AA07 AB05 AC07 AE08 5H622 CA02 CA05 CA10 CA13 CB04 PP03 PP20

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 マグネットと、ロータヨークと、このロ
ータヨークの内側に位置する出力伝達部と、一体成形に
より前記ロータヨーク及び前記出力伝達部を連結し、且
つ前記マグネットを前記ロータヨーク外周に固定した絶
縁性を有する樹脂部とから成る電動機のロータ。
1. A magnet, a rotor yoke, an output transmission portion located inside the rotor yoke, and an integral connection between the rotor yoke and the output transmission portion, and an insulating property in which the magnet is fixed to the outer periphery of the rotor yoke. And a resin part having the same.
【請求項2】 出力伝達部とロータヨークとの間隔は均
一である請求項1記載の電動機ロータ。
2. An electric motor rotor according to claim 1, wherein the distance between the output transmitting portion and the rotor yoke is uniform.
【請求項3】 偏肉マグネットを使用し、この偏肉マグ
ネットのラジアル方向の樹脂の厚みを不均一にしたて、
ロータ外径を真円にした請求項1記載の電動機ロータ。
3. An uneven thickness magnet is used, and the thickness of the resin in the radial direction of the uneven thickness magnet is made non-uniform.
The motor rotor according to claim 1, wherein the outer diameter of the rotor is a perfect circle.
【請求項4】 金型の中芯でロータヨーク内径を支持
し、マグネット、ロータヨーク、及び出力伝達部を樹脂
により一体成形した電動機ロータの製造方法。
4. A method for manufacturing a motor rotor in which the inner diameter of a rotor yoke is supported by a center of a mold, and a magnet, a rotor yoke, and an output transmission portion are integrally formed of resin.
【請求項5】 金型に突起部を設け、この突起部間にマ
グネットを挿入して樹脂により一体成形した請求項4記
載の電動機ロータの製造方法。
5. The method for manufacturing a motor rotor according to claim 4, wherein a projection is provided on the mold, and a magnet is inserted between the projections and integrally molded with resin.
JP24312298A 1998-08-28 1998-08-28 Motor rotor Expired - Lifetime JP3309811B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24312298A JP3309811B2 (en) 1998-08-28 1998-08-28 Motor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24312298A JP3309811B2 (en) 1998-08-28 1998-08-28 Motor rotor

Publications (2)

Publication Number Publication Date
JP2000078787A true JP2000078787A (en) 2000-03-14
JP3309811B2 JP3309811B2 (en) 2002-07-29

Family

ID=17099135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24312298A Expired - Lifetime JP3309811B2 (en) 1998-08-28 1998-08-28 Motor rotor

Country Status (1)

Country Link
JP (1) JP3309811B2 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
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JP2002325403A (en) * 2001-04-27 2002-11-08 Mitsubishi Electric Corp Magneto, its manufacturing method, and resin molding tool for manufacturing it
JP2003061279A (en) * 2001-08-08 2003-02-28 Matsushita Electric Ind Co Ltd Rotor for motor
JP2003088059A (en) * 2001-09-06 2003-03-20 Matsushita Electric Ind Co Ltd Method for manufacturing rotor of motor
JP2004112951A (en) * 2002-09-20 2004-04-08 Nidec Shibaura Corp Rotor for brushless dc motor
JP2009077601A (en) * 2007-09-25 2009-04-09 Hitachi Appliances Inc Rotor of driving motor
JP2010158152A (en) * 2008-12-03 2010-07-15 Panasonic Corp Motor and electrical apparatus having the same
JP2010220473A (en) * 2010-05-31 2010-09-30 Panasonic Corp Motor
JP2011139600A (en) * 2009-12-28 2011-07-14 Hitachi Industrial Equipment Systems Co Ltd Axial gap rotary electric machine and rotor used in the same
JP2014007802A (en) * 2012-06-22 2014-01-16 Kusatsu Electric Co Ltd Motor
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JP2003061279A (en) * 2001-08-08 2003-02-28 Matsushita Electric Ind Co Ltd Rotor for motor
JP2003088059A (en) * 2001-09-06 2003-03-20 Matsushita Electric Ind Co Ltd Method for manufacturing rotor of motor
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JP2010158152A (en) * 2008-12-03 2010-07-15 Panasonic Corp Motor and electrical apparatus having the same
JP2011139600A (en) * 2009-12-28 2011-07-14 Hitachi Industrial Equipment Systems Co Ltd Axial gap rotary electric machine and rotor used in the same
US8836192B2 (en) 2009-12-28 2014-09-16 Hitachi Industrial Equipment Systems Co., Ltd. Axial gap rotating electrical machine and rotor used therefor
JP2010220473A (en) * 2010-05-31 2010-09-30 Panasonic Corp Motor
JP4674655B2 (en) * 2010-05-31 2011-04-20 パナソニック株式会社 motor
JP2014007802A (en) * 2012-06-22 2014-01-16 Kusatsu Electric Co Ltd Motor
JP2015056984A (en) * 2013-09-12 2015-03-23 三菱電機株式会社 Rotary electric machine and air-conditioning equipment provided with the same
JP2016226261A (en) * 2015-05-27 2016-12-28 エルジー イノテック カンパニー リミテッド Rotor assembly and motor including the same
JP2017077111A (en) * 2015-10-15 2017-04-20 シャープ株式会社 Motor and air conditioner

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