JP3678920B2 - Electric motor and electric blower using the same - Google Patents

Electric motor and electric blower using the same Download PDF

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JP3678920B2
JP3678920B2 JP21504698A JP21504698A JP3678920B2 JP 3678920 B2 JP3678920 B2 JP 3678920B2 JP 21504698 A JP21504698 A JP 21504698A JP 21504698 A JP21504698 A JP 21504698A JP 3678920 B2 JP3678920 B2 JP 3678920B2
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plate portion
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達也 池上
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Toshiba TEC Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、電動機（電動モータ）及びこれを用いた電動送風機に関するものである。
【０００２】
【従来の技術】
従来の電動送風機には、例えば図１１に示したようなものがある。この電動送風機は、電動部１０と、この電動部１０により駆動される送風部２０を有する。
【０００３】
電動部１０は、有底筒状のモータケース１１と、モータケース１１内面に固定されたステータ（固定子）１２と、モータケース１１に回転自在に保持されたロータシャフト１３と、ロータシャフト１３に一体に設けられ且つステータ１２内に回転自在に配設されたロータ（回転子）１４と、ロータシャフト１３に保持されたコミュンテータ（整流子）１５と、モータケース１１に保持され且つコミュンテータ１５に摺接するカーボンブラシＣＢを有する。
【０００４】
また、送風部２０は、モータケース１１に取り付けられた整流板２１と、整流板２１を貫通するロータシャフト１３の端部に取り付けられた遠心ファン２２と、モータケース１１の開口端に設けたフランジ１１ａに嵌合保持されて整流板２１及び遠心ファン２２をカバーするファンカバー２３を有する。そして、電動部１０のロータシャフト１３が回転駆動されると、遠心ファン２２がロータシャフト１３と一体に回転させられる。この回転によりエアがファンカバー２３の中央の吸込口２３ａからエアが遠心ファン２２内に中央の吸込口２２ａから吸い込まれ、この吸い込まれたエアが遠心ファン２２の周縁の吐出口２２ｂから吐出され、この吐出されたエアが整流板２１に設けられた図示略のエア通路を介してモータケース１１内に案内される様になっている。この構成は周知であるので詳細な説明は省略する。
【０００５】
しかも、この電動送風機のロータ１４は、図１２〜図１４に示した様に円形状のコア基部１６ａの周面に複数の磁極歯１６ｂが周方向に等ピッチで突設させられたロータコア（回転子鉄心）１６と、ロータコア１６の隣接する磁極歯１６ｂ，１６ｂ間に図１４の如く配設され且つ両磁極歯１６ｂ，１６ｂの側面に当接するＶ字状の側面絶縁部材（側面絶縁シート）１７と、コア基部１６ａの端面に当接する基部絶縁板部１８ａ及び磁極歯１６ａの端面に当接する歯絶縁板部１８ｂが図１５，図１６の如く設けられた端面絶縁部材（絶縁端板）１８と、絶縁部材１７，１８を介して複数の磁極歯１６ｂに捲回されたロータコイル（回転子巻線）１９が設けられている。このロータコイル１９は、複数の磁極歯１６ｂに所定歯数おいて跨るように捲回されていると共に、コミュンテータ１５の整流子部材１５ａに接続されている。尚、端面絶縁部材１８の中央にはロータシャフト１３に嵌合する筒部１８ｃが一体に設けられている。
【０００６】
ところで、上述したように、製造時の寸法バラツキにより側面絶縁部材１７がロータコア１６の端面から突出して、側面絶縁部材１７が端面絶縁部材１８やロータコイル１９によって皺になったりズレたりするのを避けるために、側面絶縁部材１７のロータシャフト１３に沿う方向の寸法はロータコア１６の端面間の寸法よりも僅かに短く設定している。
【０００７】
この結果、図１７に示したようにロータコア１６の角部は絶縁部材１７，１８によって絶縁されていないので、短絡防止のためにロータコア１６の角部とロータコイル１９との間にある程度の絶縁距離Ｌをとる必要がある。
【０００８】
【発明が解決しようとする課題】
この様なロータにおいては、ロータコイル１９を絶縁部材１７，１８を介してロータコア１６の磁極歯１６ｂに巻く際に、図１７（ａ）の基部絶縁板部１８ａの角部１８ａ′が変形しなければ、絶縁距離Ｌを確保出来る。
【０００９】
しかしながら、ロータコア１６の磁極歯１６ｂに巻く際に、ロータコイル１９が図１７（ｂ），（ｃ）の如く基部絶縁板部１８ａの角部１８ａ′に食い込むので、端面絶縁部材１８の肉厚がｔ0で示したように薄い場合には絶縁距離Ｌが短くなり、好ましいものではない。特に、絶縁距離Ｌは、端面絶縁部材１８の肉厚ｔ0を変えずに、ロータコイル１９の直径を細くした場合に短くなる傾向にある。
【００１０】
従って、この絶縁距離Ｌを十分に確保するには図１８に示したように端面絶縁部材１８の肉厚ｔを図１６に示した肉厚ｔ0のものよりも厚くすることが考えられる。
【００１１】
しかし、この場合には、肉厚の増加した分だけ端面絶縁部材１８の重量が多くなると共に、ロータコイル１９の巻線長さも長くなって、この巻線長さの増加分だけロータコイル１９の重量も増加するため、ロータ１６の重量が増加するという問題がある。
【００１２】
そこで、本発明は、端面絶縁部材及びロータコイルの重量をあまり増加させずにロータコアの角部とロータコイルとの間の十分な絶縁距離を確保できる様にした電動機及びこれを用いた電動送風機を提供することを目的とするものである。
【００１３】
【課題を解決するための手段】
この目的を達成するため、請求項１の発明の電動機は、複数の磁極歯が円形状のコア基部の周面に周方向に等ピッチで突設させられたロータコアと、前記ロータコアの磁極歯間に配設され且つ両磁極歯の側面に当接する側面絶縁部材と、前記コア基部の端面に当接する基部絶縁板部及び磁極歯の端面に当接する歯絶縁板部が設けられた板状の端面絶縁部材と、前記絶縁部材を介して前記磁極歯に捲回されたロータコイルが設けられたロータを備える電動機において、前記基部絶縁板部を前記歯絶縁板部より前記端面側に突出させて前記端面に当接させることにより、前記基部絶縁板部を前記歯絶縁板部より厚く形成すると共に、前記歯絶縁板部は前記ロータコイルの巻き付け力により自己の弾性力に抗して前記ロータコアの前記磁極歯側に押圧変形させられて前記磁極歯の端面に当接させられていることを特徴とする。
【００１４】
また、請求項２の発明は、前記端面絶縁部材は、主基部絶縁板部と歯絶縁板部を備える端面絶縁部材本体と、前記主基部絶縁板部に積層された補助絶縁板を有することを特徴とする。
【００１５】
更に、請求項３の発明は、前記基部絶縁板部に周方向に延びる環状突起を形成すると共に、前記環状突起を設けた部分の厚さを前記歯絶縁板部の肉厚より厚く形成することにより、前記端面絶縁部材の基部絶縁板部の一部の厚さを前記歯絶縁板部の肉厚より厚く形成したことを特徴とする。
【００１６】
また、上述の目的を達成するため、請求項４の発明の電動送風機は、請求項１〜３の電動機で送風ファンを駆動させるようにしたことを特徴とする。
【００１７】
【発明の実施の形態】
以下、この発明の実施の形態を図１〜図１０に基づいて説明する。
【００１８】
図２において電動送風機は、電動部１０と、この電動部１０により駆動される送風部２０を有する。
【００１９】
この電動部１０は、有底筒状のモータケース１１と、モータケース１１内面に固定されたステータ（固定子）１２と、モータケース１１に回転自在に保持されたロータシャフト１３と、ロータシャフト１３に一体に設けられ且つステータ１２内に回転自在に配設されたロータ（回転子）１４と、ロータシャフト１３に保持されたコミュンテータ（整流子）１５と、モータケース１１に保持され且つコミュンテータ１５に摺接するカーボンブラシＣＢを有する。
【００２０】
また、送風部２０は、モータケース１１に取り付けられた整流板２１と、整流板２１を貫通するロータシャフト１３の端部に取り付けられた遠心ファン（送風ファン）２２と、モータケース１１の開口端に設けたフランジ１１ａに嵌合保持されて整流板２１及び遠心ファン２２をカバーするファンカバー２３を有する。そして、電動部１０のロータシャフト１３が回転駆動されると、遠心ファン２２がロータシャフト１３と一体に回転させられる。この回転によりエアがファンカバー２３の中央の吸込口２３ａからエアが遠心ファン２２内に中央の吸込口２２ａから吸い込まれ、この吸い込まれたエアが遠心ファン２２の周縁の吐出口２２ｂから吐出され、この吐出されたエアが整流板２１に設けられた図示略のエア通路を介してモータケース１１内に案内される様になっている。この構成は周知であるので詳細な説明は省略する。
【００２１】
しかも、この電動送風機のロータ１４は、図１，図２に示したように、ロータコア（回転子鉄心）１６，側面絶縁部材（側面絶縁シート）１７，端面絶縁部材（絶縁端板）１８，ロータコイル（回転子巻線）１９を有する。
【００２２】
このロータコア１６は、図３〜図４に示した様に、円形状のコア基部１６ａと、コア基部１６ａの周面に周方向に等ピッチで突設させられた複数の磁極歯１６ｂを有する。
【００２３】
また、側面絶縁部材１７は、図５，図９に示したように、平面形状がＶ字状に形成されていると共に、ロータコア１６の隣接する磁極歯１６ｂ，１６ｂ間に図４の如く配設されて、自己の弾性力により両磁極歯１６ｂ，１６ｂの側面に当接している。しかも、側面絶縁部材１７のロータシャフト１３に沿う方向の寸法はロータコア１６の両端面間の寸法よりも僅かに小さく設定されている。
【００２４】
更に、端面絶縁部材１８は、図１，図６〜図９の如く、コア基部１６ａに対向する基部絶縁板部１８ａと、磁極歯１６ａの端面に対向する歯絶縁板部１８ｂを有する。しかも、この端面絶縁部材１８は、平面形状がロータコア１６の端面形状と略同じに形成されている。
【００２５】
この端面絶縁部材１８の基部絶縁板部１８ａには、ロータコア１６の端面側に突出してコア基部１６ａの端面に当接する円形突部３０が設けられている。しかも、この端面絶縁部材１８の基部絶縁板部１８ａの厚さは、歯絶縁板部１８ｂの肉厚より厚く形成されている。１８ｃは、端面絶縁部材１８の中央に一体に形成された筒部である。この筒部１８ｃはロータシャフト１３に嵌合されている。
また、ロータコイル１９は、複数の磁極歯１６ｂに所定歯数おいて跨るように捲回されていると共に、コミュンテータ１５の整流子部材１５ａに接続されている。しかも、端面絶縁部材１８の歯絶縁板部１８ｂは、ロータコイル１９の巻き付け力により自己の弾性力に抗してロータコア１６の磁極歯１６ｂ側に押圧変形させられて、磁極歯１６ｂの端面に当接させられている。この押圧変形により歯絶縁板部１８ｂが撓められた分だけ、ロータコア１６の両端に設けた端面絶縁部材１８，１８の歯絶縁板部１８ｂ，１８ｂの間隔が狭くなる。従って、この場合には、ロータコア１６の両端に設けた端面絶縁部材１８，１８の歯絶縁板部１８ｂ，１８ｂが撓められていない状態でロータコイル１９が捲回された場合に比べて、ロータコイル１９の巻線長さが短くなり、ロータコイル１９の重量を少なくできる。
【００２６】
次に、この様な構成の電動送風機の作用を説明する。
【００２７】
カーボンブラシＣＢ及びコミュンテータ１５を介してロータ１４のロータコイル１９に通電すると、ロータ１４が磁極歯１６ｂに発生する磁力で回転駆動される。これによりロータシャフト１３がロータ１４と一体に回転駆動されて、遠心ファン２２がロータシャフト１３と一体に回転させられる。
【００２８】
このロータ１４は、図１８の端面絶縁部材１８を用いたものに比べて、端面絶縁部材１８及びロータコイル１９の重量が軽くなっているので、慣性力も小さくなっている。
【００２９】
従って、上述の構成の電動送風機を電気掃除機に用いて、電動送風機の回転数を段階的に可変して、電気掃除機の吸込風量を例えば「強、中、弱」等に制御できる様に構成した場合、ロータ１４の回転数切替制御を迅速に行うことができることになる。
【００３０】
そして、遠心ファン２２の回転によりエアがファンカバー２３の中央の吸込口２３ａからエアが遠心ファン２２内に中央の吸込口２２ａから吸い込まれ、この吸い込まれたエアが遠心ファン２２の周縁の吐出口２２ｂから吐出され、この吐出されたエアが整流板２１に設けられた図示略のエア通路を介してモータケース１１内に案内される。
【００３１】
また、上述した実施例では、端面絶縁部材１８の基部絶縁板部１８ａに円形突部３０を設けて、基部絶縁板部１８ａの厚さを歯絶縁板部１８ｂの厚さよりも厚くしている構成としたが、必ずしもこれに限定されるものではない。
【００３２】
例えば、図１０（ａ）に示したように、基部絶縁板部１８ａの内外周縁部に周方向に延びる内外二重の環状突起３１，３２を形成すると共に、環状突起３１，３２を設けた部分の厚さを歯絶縁板部１８ｂの肉厚より厚く形成することにより、端面絶縁部材１８の基部絶縁板部１８ａの一部の厚さを歯絶縁板部１８ｂの肉厚より厚く形成した構成としても良い。この実施例の端面絶縁部材１８は、上述した図７の端面絶縁部材１８に比べて、重量をより軽くできる。
【００３３】
また、上述した実施例では、端面絶縁部材１８の基部絶縁板部１８ａに円形突部３０を一体に形成して、基部絶縁板部１８ａの厚さを歯絶縁板部１８ｂの厚さよりも厚くしている構成としたが、必ずしもこれに限定されるものではない。
【００３４】
例えば、図１０（ｂ）に示したような端面絶縁部材（絶縁端板）４０を、端面絶縁部材１８に代えて用いる様にしても良い。この端面絶縁部材４０は、端面絶縁部材本体４１と円形の補助絶縁部材（補助絶縁板）４２を有する。この端面絶縁部材本体４１は、主基部絶縁板部４１ａと歯絶縁板部４１ｂを備え、ロータコア１６の端面形状と略同じ形状に形成されている。そして、補助絶縁部材４２は、端面絶縁部材本体４１の主基部絶縁板部４１ａに積層されている。この主基部絶縁板部４１ａと補助絶縁部材４２により、端面絶縁部材４０の基部絶縁板部４０ａを構成している。そして、厚さの異なる補助絶縁部材４２を複数用意しておいて、必要に応じて補助絶縁部材４２の厚さを選択することにより、基部絶縁板部４０ａの厚さを調整できる。４１ｃは端面絶縁部材本体４１の中央に設けられた筒部で、この筒部４１ｃは上述のロータシャフト１３に嵌合保持される。
【００３５】
【発明の効果】
以上説明したように、請求項１の発明の電動機は、複数の磁極歯が円形状のコア基部の周面に周方向に等ピッチで突設させられたロータコアと、前記ロータコアの磁極歯間に配設され且つ両磁極歯の側面に当接する側面絶縁部材と、前記コア基部の端面に当接する基部絶縁板部及び磁極歯の端面に当接する歯絶縁板部が設けられた板状の端面絶縁部材と、前記絶縁部材を介して前記磁極歯に捲回されたロータコイルが設けられたロータを備える電動機において、
前記基部絶縁板部を前記歯絶縁板部より前記端面側に突出させて前記端面に当接させることにより、前記基部絶縁板部を前記歯絶縁板部より厚く形成すると共に、前記歯絶縁板部は前記ロータコイルの巻き付け力により自己の弾性力に抗して前記ロータコアの前記磁極歯側に押圧変形させられて前記磁極歯の端面に当接させられている構成としたので、端面絶縁部材及びロータコイルの重量をあまり増加させずにロータコアの角部とロータコイルとの間の十分な絶縁距離を確保できる。
【００３６】
また、請求項２の発明は、前記端面絶縁部材は、主基部絶縁板部と歯絶縁板部を備える端面絶縁部材本体と、前記主基部絶縁板部に積層された補助絶縁板を有する構成としたので、ロータコアの角部とロータコイルとの間の絶縁距離を補助絶縁板の厚さを変えることで、容易に調整できる。この結果、ロータコイルの直径を変更した場合において、ロータコアの角部とロータコイルとの間の十分な絶縁距離を確保するために、端面絶縁部材の厚さを変更する必要がある場合でも、一種類の端面絶縁部材と厚さの異なる複数の補助絶縁部材を用意しておくだけで対応できるので、ロータコアの平面形状と同じ形状を有する端面絶縁部材の成形金型を複数用意する必要がなく、製造コストが増加するのを回避できる。
【００３７】
更に、請求項３の発明は、前記基部絶縁板部に周方向に延びる環状突起を形成すると共に、前記環状突起を設けた部分の厚さを前記歯絶縁板部の肉厚より厚く形成することにより、前記端面絶縁部材の基部絶縁板部の一部の厚さを前記歯絶縁板部の肉厚より厚く形成した構成としたので、端面絶縁部材の重量をより少なくできる。
【００３８】
また、請求項４の発明の電動送風機は、請求項１〜３の電動機で送風ファンを駆動させる構成としたので、装置全体の重量を軽減できる。
【図面の簡単な説明】
【図１】本発明に係る電動機のロータ（回転子）の要部断面拡大説明図である。
【図２】図１のロータを備える電動機が組み込まれた電動送風機の半断面図である。
【図３】図２のロータの半断面拡大説明図である。
【図４】図３のロータコイル（回転子巻線）を除いた状態のロータの説明図である。
【図５】図４のロータコアとその磁極歯側面の絶縁部材との関係を示す平面図である。
【図６】図４のロータコアの端面を絶縁する端面絶縁部材（絶縁端板）の平面図である。
【図７】図６のＡ−Ａ線に沿う断面図である。
【図８】図４のロータコアと絶縁部材との関係を示す要部拡大斜視図である。
【図９】図８の分解斜視図である。
【図１０】（ａ），（ｂ）は、ロータコアの端面を絶縁する端面絶縁部材の変形例を示す断面図である。
【図１１】従来の電動機を備える電動送風機の半断面図である。
【図１２】図１１の電動機のロータの半断面拡大説明図である。
【図１３】図１２のロータコイル（回転子巻線）を除いた状態のロータの説明図である。
【図１４】図１３のロータコアとその磁極歯側面の絶縁部材との関係を示す平面図である。
【図１５】図１３のロータコアの端面を絶縁する端面絶縁部材（絶縁端板）の平面図である。
【図１６】図１５のＢ−Ｂ線に沿う断面図である。
【図１７】（ａ）はロータコアと図１５，図１６に示した絶縁部材との関係を示す拡大断面説明図、（ｂ）は（ａ）の構成とロータコイルとの関係を示す説明図、（ｃ）は（ｂ）の要部拡大説明図である。
【図１８】従来のロータコアの端面を絶縁する端面絶縁部材の他の例を示す断面図である。
【図１９】（ａ）はロータコアと図１８に示した絶縁部材及びロータコイルとの関係を示す説明図、（ｂ）は（ａ）の要部拡大説明図である。
【符号の説明】
１０・・・電動機
１６・・・ロータコア
１６ａ・・・コア基部
１６ｂ・・・磁極歯
１７・・・側面絶縁部材（側面絶縁シート）
１８・・・端面絶縁部材
１８ａ・・・基部絶縁板部
１８ｂ・・・歯絶縁板部
１９・・・ロータコイル
２０・・・送風部
２２・・・遠心ファン（送風ファン）
３１，３２・・・環状突起
４０・・・端面絶縁部材
４１・・・端面絶縁部材本体
４１ａ・・・基部絶縁板部
４１ｂ・・・歯絶縁板部
４２・・・補助絶縁部材（補助絶縁板）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric motor (electric motor) and an electric blower using the same.
[0002]
[Prior art]
A conventional electric blower is, for example, as shown in FIG. The electric blower includes an electric unit 10 and an air blowing unit 20 driven by the electric unit 10.
[0003]
The electric unit 10 includes a bottomed cylindrical motor case 11, a stator (stator) 12 fixed to the inner surface of the motor case 11, a rotor shaft 13 rotatably held by the motor case 11, and a rotor shaft 13. A rotor (rotor) 14 that is integrally provided and rotatably disposed in the stator 12, a commutator (commutator) 15 that is held by the rotor shaft 13, and that is held by the motor case 11 and slides on the commutator 15. It has a carbon brush CB in contact.
[0004]
Further, the air blowing unit 20 includes a rectifying plate 21 attached to the motor case 11, a centrifugal fan 22 attached to the end of the rotor shaft 13 that penetrates the rectifying plate 21, and a flange provided at the opening end of the motor case 11. The fan cover 23 covers the rectifying plate 21 and the centrifugal fan 22 by being fitted and held in the 11a. When the rotor shaft 13 of the electric unit 10 is driven to rotate, the centrifugal fan 22 is rotated integrally with the rotor shaft 13. By this rotation, air is sucked into the centrifugal fan 22 from the central suction port 22a from the central suction port 23a of the fan cover 23, and the sucked air is discharged from the discharge port 22b at the peripheral edge of the centrifugal fan 22. The discharged air is guided into the motor case 11 through an air passage (not shown) provided in the rectifying plate 21. Since this configuration is well known, detailed description thereof is omitted.
[0005]
In addition, the rotor 14 of this electric blower has a rotor core (rotation) in which a plurality of magnetic pole teeth 16b project from the circumferential surface of the circular core base portion 16a at an equal pitch in the circumferential direction as shown in FIGS. 14 and a V-shaped side insulating member (side insulating sheet) 17 disposed between the adjacent magnetic pole teeth 16b and 16b of the rotor core 16 as shown in FIG. 14 and in contact with the side surfaces of both magnetic pole teeth 16b and 16b. And an end surface insulating member (insulating end plate) 18 provided with a base insulating plate portion 18a contacting the end surface of the core base portion 16a and a tooth insulating plate portion 18b contacting the end surface of the magnetic pole teeth 16a as shown in FIGS. A rotor coil (rotor winding) 19 wound around a plurality of magnetic pole teeth 16b via insulating members 17 and 18 is provided. The rotor coil 19 is wound around the plurality of magnetic pole teeth 16b with a predetermined number of teeth and is connected to the commutator member 15a of the commutator 15. A cylindrical portion 18 c that fits into the rotor shaft 13 is integrally provided at the center of the end surface insulating member 18.
[0006]
By the way, as described above, the side surface insulating member 17 protrudes from the end surface of the rotor core 16 due to dimensional variation during manufacturing, and the side surface insulating member 17 is prevented from being wrinkled or displaced by the end surface insulating member 18 or the rotor coil 19. Therefore, the dimension of the side insulating member 17 in the direction along the rotor shaft 13 is set slightly shorter than the dimension between the end faces of the rotor core 16.
[0007]
As a result, as shown in FIG. 17, the corners of the rotor core 16 are not insulated by the insulating members 17, 18, so that a certain amount of insulation distance is provided between the corners of the rotor core 16 and the rotor coil 19 to prevent a short circuit. It is necessary to take L.
[0008]
[Problems to be solved by the invention]
In such a rotor, when the rotor coil 19 is wound around the magnetic pole teeth 16b of the rotor core 16 via the insulating members 17 and 18, the corner portion 18a 'of the base insulating plate portion 18a in FIG. Thus, the insulation distance L can be secured.
[0009]
However, when the coil is wound around the magnetic pole teeth 16b of the rotor core 16, the rotor coil 19 bites into the corner portion 18a 'of the base insulating plate portion 18a as shown in FIGS. 17 (b) and 17 (c). When it is thin as indicated by t 0 , the insulation distance L becomes short, which is not preferable. In particular, the insulation distance L tends to be shortened when the diameter of the rotor coil 19 is reduced without changing the thickness t 0 of the end face insulating member 18.
[0010]
Therefore, in order to sufficiently secure this insulation distance L, it is conceivable to make the thickness t of the end surface insulating member 18 thicker than that of the thickness t 0 shown in FIG. 16 as shown in FIG.
[0011]
However, in this case, the weight of the end surface insulating member 18 increases as the thickness increases, and the winding length of the rotor coil 19 also increases, and the increase in the winding length of the rotor coil 19 increases. Since the weight also increases, there is a problem that the weight of the rotor 16 increases.
[0012]
Therefore, the present invention provides an electric motor and an electric blower using the electric motor that can secure a sufficient insulation distance between the corners of the rotor core and the rotor coil without significantly increasing the weight of the end surface insulating member and the rotor coil. It is intended to provide.
[0013]
[Means for Solving the Problems]
In order to achieve this object, an electric motor according to a first aspect of the present invention includes a rotor core in which a plurality of magnetic pole teeth are protruded from the circumferential surface of a circular core base at an equal pitch in the circumferential direction, and between the magnetic pole teeth of the rotor core. A plate-like end surface provided with a side insulating member disposed on the side surface of both magnetic pole teeth, a base insulating plate portion contacting the end surface of the core base portion, and a tooth insulating plate portion contacting the end surface of the magnetic pole teeth In an electric motor comprising an insulating member and a rotor provided with a rotor coil wound around the magnetic pole teeth via the insulating member, the base insulating plate portion protrudes from the tooth insulating plate portion to the end face side, and By contacting the end surface, the base insulating plate portion is formed thicker than the tooth insulating plate portion, and the tooth insulating plate portion resists its own elastic force by the winding force of the rotor coil. Push toward the pole teeth Wherein the is deformed and brought into contact with the end face of the magnetic pole teeth.
[0014]
According to a second aspect of the present invention, the end surface insulating member includes an end surface insulating member body including a main base insulating plate portion and a tooth insulating plate portion, and an auxiliary insulating plate laminated on the main base insulating plate portion. Features.
[0015]
Furthermore, in the invention of claim 3, an annular protrusion extending in the circumferential direction is formed on the base insulating plate portion, and a thickness of the portion provided with the annular protrusion is formed thicker than a thickness of the tooth insulating plate portion. Thus, the thickness of a part of the base insulating plate portion of the end surface insulating member is made thicker than the thickness of the tooth insulating plate portion.
[0016]
In order to achieve the above object, an electric blower according to a fourth aspect of the invention is characterized in that the blower fan is driven by the electric motor according to the first to third aspects.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0018]
In FIG. 2, the electric blower has an electric part 10 and an air blowing part 20 driven by the electric part 10.
[0019]
The electric part 10 includes a bottomed cylindrical motor case 11, a stator 12 fixed to the inner surface of the motor case 11, a rotor shaft 13 rotatably held in the motor case 11, and a rotor shaft 13. The rotor (rotor) 14 provided integrally with the rotor 12 and rotatably disposed in the stator 12, a commutator 15 held by the rotor shaft 13, and the motor case 11 and the commutator 15 The carbon brush CB is in sliding contact.
[0020]
The air blowing unit 20 includes a rectifying plate 21 attached to the motor case 11, a centrifugal fan (air blowing fan) 22 attached to the end of the rotor shaft 13 that passes through the rectifying plate 21, and an open end of the motor case 11. And a fan cover 23 that covers and fits the current plate 21 and the centrifugal fan 22. When the rotor shaft 13 of the electric unit 10 is driven to rotate, the centrifugal fan 22 is rotated integrally with the rotor shaft 13. By this rotation, air is sucked into the centrifugal fan 22 from the central suction port 22a from the central suction port 23a of the fan cover 23, and the sucked air is discharged from the discharge port 22b at the peripheral edge of the centrifugal fan 22. The discharged air is guided into the motor case 11 through an air passage (not shown) provided in the rectifying plate 21. Since this configuration is well known, detailed description thereof is omitted.
[0021]
Moreover, as shown in FIGS. 1 and 2, the rotor 14 of this electric blower includes a rotor core (rotor core) 16, a side insulating member (side insulating sheet) 17, an end surface insulating member (insulating end plate) 18, a rotor. A coil (rotor winding) 19 is provided.
[0022]
As shown in FIGS. 3 to 4, the rotor core 16 has a circular core base portion 16 a and a plurality of magnetic pole teeth 16 b that protrude from the peripheral surface of the core base portion 16 a at an equal pitch in the circumferential direction.
[0023]
Further, as shown in FIGS. 5 and 9, the side surface insulating member 17 has a V-shaped planar shape and is disposed between adjacent magnetic pole teeth 16b and 16b of the rotor core 16 as shown in FIG. Thus, it is in contact with the side surfaces of both magnetic pole teeth 16b, 16b by its own elastic force. Moreover, the dimension of the side insulating member 17 in the direction along the rotor shaft 13 is set to be slightly smaller than the dimension between both end faces of the rotor core 16.
[0024]
Further, as shown in FIGS. 1 and 6 to 9, the end surface insulating member 18 has a base insulating plate portion 18a facing the core base portion 16a and a tooth insulating plate portion 18b facing the end surface of the magnetic pole teeth 16a. In addition, the end surface insulating member 18 has a planar shape substantially the same as the end surface shape of the rotor core 16.
[0025]
The base insulating plate portion 18a of the end surface insulating member 18 is provided with a circular protrusion 30 that protrudes toward the end surface side of the rotor core 16 and contacts the end surface of the core base portion 16a. Moreover, the thickness of the base insulating plate portion 18a of the end face insulating member 18 is thicker than the thickness of the tooth insulating plate portion 18b. Reference numeral 18 c denotes a cylindrical portion integrally formed at the center of the end surface insulating member 18. The cylinder portion 18 c is fitted to the rotor shaft 13.
The rotor coil 19 is wound around the magnetic pole teeth 16b so as to extend over a predetermined number of teeth, and is connected to the commutator member 15a of the commutator 15. In addition, the tooth insulating plate portion 18b of the end surface insulating member 18 is pressed and deformed toward the magnetic pole teeth 16b of the rotor core 16 against its own elastic force by the winding force of the rotor coil 19, and contacts the end surfaces of the magnetic pole teeth 16b. It is touched. The distance between the tooth insulating plate portions 18b and 18b of the end surface insulating members 18 and 18 provided at both ends of the rotor core 16 is reduced by the amount by which the tooth insulating plate portion 18b is bent by this pressing deformation. Therefore, in this case, compared with the case where the rotor coil 19 is wound in a state where the tooth insulating plate portions 18b, 18b of the end surface insulating members 18, 18 provided at both ends of the rotor core 16 are not bent. The winding length of the coil 19 is shortened, and the weight of the rotor coil 19 can be reduced.
[0026]
Next, the operation of the electric blower having such a configuration will be described.
[0027]
When the rotor coil 19 of the rotor 14 is energized through the carbon brush CB and the commutator 15, the rotor 14 is rotationally driven by the magnetic force generated in the magnetic pole teeth 16b. Thereby, the rotor shaft 13 is rotationally driven integrally with the rotor 14, and the centrifugal fan 22 is rotated integrally with the rotor shaft 13.
[0028]
The rotor 14 has a smaller inertia force because the weight of the end surface insulating member 18 and the rotor coil 19 is lighter than that using the end surface insulating member 18 of FIG.
[0029]
Therefore, by using the electric blower having the above-described configuration for a vacuum cleaner, the rotation speed of the electric blower can be changed in stages, and the suction air volume of the vacuum cleaner can be controlled to, for example, “strong, medium, weak”, etc. When configured, the rotational speed switching control of the rotor 14 can be performed quickly.
[0030]
Then, by the rotation of the centrifugal fan 22, air is sucked into the centrifugal fan 22 from the central suction port 22 a from the central suction port 23 a of the fan cover 23, and the sucked air is discharged to the peripheral edge of the centrifugal fan 22. The air discharged from 22 b is guided into the motor case 11 through an air passage (not shown) provided in the rectifying plate 21.
[0031]
In the above-described embodiment, the base insulating plate portion 18a of the end surface insulating member 18 is provided with the circular protrusion 30 so that the thickness of the base insulating plate portion 18a is thicker than the thickness of the tooth insulating plate portion 18b. However, the present invention is not necessarily limited to this.
[0032]
For example, as shown in FIG. 10 (a), inner and outer double annular protrusions 31 and 32 extending in the circumferential direction are formed on the inner and outer peripheral edges of the base insulating plate 18a, and the annular protrusions 31 and 32 are provided. The thickness of the base insulating plate portion 18a of the end surface insulating member 18 is made thicker than the thickness of the tooth insulating plate portion 18b. Also good. The end face insulating member 18 of this embodiment can be made lighter than the end face insulating member 18 of FIG. 7 described above.
[0033]
In the above-described embodiment, the circular protrusion 30 is integrally formed on the base insulating plate portion 18a of the end surface insulating member 18, and the thickness of the base insulating plate portion 18a is made thicker than the thickness of the tooth insulating plate portion 18b. However, the present invention is not necessarily limited to this.
[0034]
For example, an end face insulating member (insulating end plate) 40 as shown in FIG. 10B may be used in place of the end face insulating member 18. The end surface insulating member 40 includes an end surface insulating member main body 41 and a circular auxiliary insulating member (auxiliary insulating plate) 42. The end surface insulating member main body 41 includes a main base insulating plate portion 41a and a tooth insulating plate portion 41b, and is formed in substantially the same shape as the end surface shape of the rotor core 16. The auxiliary insulating member 42 is laminated on the main base insulating plate portion 41 a of the end surface insulating member main body 41. The main base insulating plate portion 41 a and the auxiliary insulating member 42 constitute a base insulating plate portion 40 a of the end surface insulating member 40. A plurality of auxiliary insulating members 42 having different thicknesses are prepared, and the thickness of the base insulating plate portion 40a can be adjusted by selecting the thickness of the auxiliary insulating member 42 as necessary. 41c is a cylinder part provided in the center of the end surface insulating member main body 41, and this cylinder part 41c is fitted and held on the rotor shaft 13 described above.
[0035]
【The invention's effect】
As described above, the electric motor according to the first aspect of the present invention includes a rotor core in which a plurality of magnetic pole teeth protrudes from the circumferential surface of the circular core base at an equal pitch in the circumferential direction, and the magnetic pole teeth of the rotor core. Plate-like end surface insulation provided with a side insulating member that is disposed and that contacts the side surfaces of both magnetic pole teeth, a base insulating plate portion that contacts the end surface of the core base portion, and a tooth insulating plate portion that contacts the end surface of the magnetic pole teeth In an electric motor comprising a member and a rotor provided with a rotor coil wound around the magnetic pole teeth via the insulating member,
The base insulating plate portion is formed to be thicker than the tooth insulating plate portion by projecting the base insulating plate portion from the tooth insulating plate portion toward the end surface and abutting against the end surface, and the tooth insulating plate portion. Is configured to be pressed and deformed toward the magnetic pole tooth side of the rotor core against the elastic force of the rotor coil by the winding force of the rotor coil and brought into contact with the end face of the magnetic pole tooth. A sufficient insulation distance between the corners of the rotor core and the rotor coil can be ensured without significantly increasing the weight of the rotor coil.
[0036]
According to a second aspect of the present invention, the end surface insulating member includes an end surface insulating member body including a main base insulating plate portion and a tooth insulating plate portion, and an auxiliary insulating plate laminated on the main base insulating plate portion. Therefore, the insulation distance between the corners of the rotor core and the rotor coil can be easily adjusted by changing the thickness of the auxiliary insulating plate. As a result, when the diameter of the rotor coil is changed, even if it is necessary to change the thickness of the end surface insulating member in order to ensure a sufficient insulation distance between the corner of the rotor core and the rotor coil, the Since it is possible to cope by simply preparing a plurality of auxiliary insulating members having different thicknesses from the types of end surface insulating members, it is not necessary to prepare a plurality of end surface insulating member molding dies having the same shape as the planar shape of the rotor core, An increase in manufacturing cost can be avoided.
[0037]
Furthermore, in the invention of claim 3, an annular protrusion extending in the circumferential direction is formed on the base insulating plate portion, and a thickness of the portion provided with the annular protrusion is formed thicker than a thickness of the tooth insulating plate portion. Thus, since the thickness of a part of the base insulating plate portion of the end surface insulating member is formed thicker than the thickness of the tooth insulating plate portion, the weight of the end surface insulating member can be further reduced.
[0038]
Moreover, since the electric blower of the invention of Claim 4 was set as the structure which drives a ventilation fan with the electric motor of Claims 1-3, the weight of the whole apparatus can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional enlarged explanatory view of a main part of a rotor (rotor) of an electric motor according to the present invention.
2 is a half cross-sectional view of an electric blower in which an electric motor including the rotor of FIG. 1 is incorporated.
3 is an enlarged explanatory view of a half cross section of the rotor of FIG. 2;
4 is an explanatory diagram of the rotor in a state where the rotor coil (rotor winding) of FIG. 3 is removed.
5 is a plan view showing the relationship between the rotor core of FIG. 4 and the insulating members on the side surfaces of the magnetic pole teeth.
6 is a plan view of an end surface insulating member (insulating end plate) that insulates the end surface of the rotor core of FIG. 4;
7 is a cross-sectional view taken along line AA in FIG.
8 is an enlarged perspective view of a main part showing a relationship between a rotor core and an insulating member in FIG. 4;
FIG. 9 is an exploded perspective view of FIG.
FIGS. 10A and 10B are cross-sectional views showing a modification of the end face insulating member that insulates the end face of the rotor core. FIGS.
FIG. 11 is a half sectional view of an electric blower provided with a conventional electric motor.
12 is an enlarged explanatory view of a half cross section of the rotor of the electric motor of FIG. 11;
13 is an explanatory diagram of the rotor in a state where the rotor coil (rotor winding) of FIG. 12 is removed.
14 is a plan view showing the relationship between the rotor core of FIG. 13 and the insulating members on the side surfaces of the magnetic pole teeth.
15 is a plan view of an end surface insulating member (insulating end plate) that insulates the end surface of the rotor core of FIG. 13;
16 is a cross-sectional view taken along line BB in FIG.
17A is an enlarged cross-sectional explanatory view showing the relationship between the rotor core and the insulating member shown in FIGS. 15 and 16, and FIG. 17B is an explanatory view showing the relationship between the configuration of FIG. (C) is a principal part enlarged explanatory view of (b).
FIG. 18 is a cross-sectional view showing another example of an end surface insulating member that insulates an end surface of a conventional rotor core.
19A is an explanatory view showing the relationship between the rotor core, the insulating member and the rotor coil shown in FIG. 18, and FIG. 19B is an enlarged explanatory view of the main part of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Electric motor 16 ... Rotor core 16a ... Core base 16b ... Magnetic pole tooth 17 ... Side surface insulation member (side surface insulation sheet)
18 ... End face insulating member 18a ... Base insulating plate 18b ... Tooth insulating plate 19 ... Rotor coil 20 ... Blower 22 ... Centrifugal fan (blower fan)
31, 32 ... annular projection 40 ... end face insulating member 41 ... end face insulating member body 41a ... base insulating plate part 41b ... tooth insulating plate part 42 ... auxiliary insulating member (auxiliary insulating plate) )

Claims (4)

複数の磁極歯が円形状のコア基部の周面に周方向に等ピッチで突設させられたロータコアと、前記ロータコアの磁極歯間に配設され且つ両磁極歯の側面に当接する側面絶縁部材と、前記コア基部の端面に当接する基部絶縁板部及び磁極歯の端面に当接する歯絶縁板部が設けられた板状の端面絶縁部材と、前記絶縁部材を介して前記磁極歯に捲回されたロータコイルが設けられたロータを備える電動機において、
前記基部絶縁板部を前記歯絶縁板部より前記端面側に突出させて前記端面に当接させることにより、前記基部絶縁板部を前記歯絶縁板部より厚く形成すると共に、前記歯絶縁板部は前記ロータコイルの巻き付け力により自己の弾性力に抗して前記ロータコアの前記磁極歯側に押圧変形させられて前記磁極歯の端面に当接させられていることを特徴とする電動機。A rotor core having a plurality of magnetic pole teeth projecting from the circumferential surface of the circular core base at an equal pitch in the circumferential direction; A plate-like end surface insulating member provided with a base insulating plate portion that contacts the end surface of the core base portion and a tooth insulating plate portion that contacts the end surface of the magnetic pole teeth, and wound around the magnetic pole teeth via the insulating member In an electric motor comprising a rotor provided with a rotor coil made
The base insulating plate portion is formed to be thicker than the tooth insulating plate portion by projecting the base insulating plate portion from the tooth insulating plate portion toward the end surface and abutting against the end surface, and the tooth insulating plate portion. Is an electric motor which is pressed against the magnetic pole tooth side of the rotor core against the elastic force by the winding force of the rotor coil and is brought into contact with the end face of the magnetic pole tooth . 前記端面絶縁部材は、主基部絶縁板部と歯絶縁板部を備える端面絶縁部材本体と、前記主基部絶縁板部に積層された補助絶縁板を有することを特徴とする請求項１に記載の電動機。The said end surface insulating member has an auxiliary surface insulating board laminated | stacked on the said main base insulating board part, and the end surface insulating member main body provided with the main base insulating board part and the tooth | gear insulating board part, The Claim 1 characterized by the above-mentioned. Electric motor. 前記基部絶縁板部に周方向に延びる環状突起を形成すると共に、前記環状突起を設けた部分の厚さを前記歯絶縁板部の肉厚より厚く形成することにより、前記端面絶縁部材の基部絶縁板部の一部の厚さを前記歯絶縁板部の肉厚より厚く形成したことを特徴とする請求項１に記載の電動機。An annular projection extending in the circumferential direction is formed on the base insulating plate portion, and a thickness of a portion provided with the annular projection is formed to be thicker than a thickness of the tooth insulating plate portion, thereby insulating the base portion of the end face insulating member. The electric motor according to claim 1, wherein a thickness of a part of the plate portion is formed to be thicker than a thickness of the tooth insulating plate portion. 請求項１〜３の電動機で送風ファンを駆動させるようにしたことを特徴とする電動送風機。An electric blower characterized in that the blower fan is driven by the electric motor according to claim 1.
JP21504698A 1998-07-30 1998-07-30 Electric motor and electric blower using the same Expired - Fee Related JP3678920B2 (en)

Priority Applications (1)

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JP21504698A JP3678920B2 (en) 1998-07-30 1998-07-30 Electric motor and electric blower using the same

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Application Number Priority Date Filing Date Title
JP21504698A JP3678920B2 (en) 1998-07-30 1998-07-30 Electric motor and electric blower using the same

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JP2000050551A JP2000050551A (en) 2000-02-18
JP3678920B2 true JP3678920B2 (en) 2005-08-03

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Publication number Priority date Publication date Assignee Title
JP4166780B2 (en) * 2005-12-01 2008-10-15 松下エコシステムズ株式会社 Stator of adder motor
KR100934017B1 (en) 2007-12-11 2009-12-28 엘지전자 주식회사 motor
CN113726052A (en) * 2021-09-27 2021-11-30 珠海格力电器股份有限公司 Rotor baffle plate assembly, motor and industrial ceiling fan
CN115912697A (en) * 2023-01-09 2023-04-04 恒业智能驱动(杭州)股份有限公司 Iron core with insulating end plate

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