JP3604946B2 - Split stator core - Google Patents

Split stator core Download PDF

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Publication number
JP3604946B2
JP3604946B2 JP09458399A JP9458399A JP3604946B2 JP 3604946 B2 JP3604946 B2 JP 3604946B2 JP 09458399 A JP09458399 A JP 09458399A JP 9458399 A JP9458399 A JP 9458399A JP 3604946 B2 JP3604946 B2 JP 3604946B2
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JP
Japan
Prior art keywords
stator core
electromagnetic steel
core
steel sheet
split
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.)
Expired - Fee Related
Application number
JP09458399A
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Japanese (ja)
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JP2000295801A (en
Inventor
彰 金子
光一郎 大原
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 Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems 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
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Priority to JP09458399A priority Critical patent/JP3604946B2/en
Publication of JP2000295801A publication Critical patent/JP2000295801A/en
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Description

【０００１】
【発明の属する技術分野】
本発明は分割形ステータコアを提供する技術に関する。
【０００２】
【従来の技術】
従来、分割形ステータコアを製造する方法としては、電磁鋼板をプレスで打抜く際、型内積層あるいはレーザ溶接等で数枚固着してコアブロック１´を作成し、このコアブロック１´を複数個円筒状に配置し、図５に示すように互いの合せ部分６´を溶接して固着しステータコアを形成する方法がよく知られている。溶接以外の方法として、円筒状に配置したコアブロックの外周に円筒を圧入又は焼きばめすることでもコアブロックを固着しステータコアを形成することも知られている。また、嵌入した分割積層コアを通しボルトで組上げることも提案されている（特開平７−２２２３８３号公報）。
【０００３】
しかし、前記溶接によるコアブロックの固着方法では、積層された電磁鋼板どうしが互いに電気的に導通の状態となるため、電磁鋼板を重ねただけのものと比較すると電気的特性が劣るといった欠点がある。また、コア外周に円筒を圧入又は焼きばめしたり、通しボルトを使用する方法では、新たに部品が必要となりコストアップになるといった問題がある。
【０００４】
【発明が解決しようとする課題】
本発明の目的は、従来技術の問題を解決するものであり、溶接等を使用しないので電気的特性を下げることはなく、そして、新たな部品を用いないため製造コストの上昇を抑えることができるモータ等の分割形ステータコアを提供することにある。
【０００５】
【課題を解決するための手段】
本発明は、電磁鋼板を積層したコアブロックを複数個組み合せて構成する分割形ステータコアにおいて、前記コアブロックは、隣に位置するコアブロックの外側に突出して塑性変形された櫛状部分を有する分割形ステータコアである。
【０００６】
また、本発明は、上記電磁鋼板は、隣に位置するコアブロックの電磁鋼板に接する面に突出折曲片又は切欠部を有する分割形ステータコアである。
【０００７】
そして、本発明は、上記電磁鋼板は、上層又は下層の電磁鋼板の突出折曲片を折曲げて挿入する溝部を有する分割形ステータコアである。
【０００８】
【発明の実施の形態】
本発明の発明の実施の形態を説明する。
本発明の分割形ステータコアの実施例について、図１〜図４を用いて説明する。図１は、実施例の分割形ステータコアの斜視説明図である。図２は、実施例の分割形ステータコアを構成するコアブロックの一例の説明図である。図３は、実施例におけるコアブロックに使用される電磁鋼板の一例の説明図である。図４は、実施例におけるコアブロックの組立状態の部分説明図である。
【０００９】
本発明の分割形ステータコアの一実施例を説明する。本実施例の分割形ステータコアは、図１に示すように、コアブロック１を１２個組合せて構成したものである。各コアブロック１は、図２に示すように、電磁鋼板２の積層体からなり、櫛状部３を有している。櫛状部３は、電磁鋼板２の突出折曲片であり、組合せ時に隣に位置するコアブロック１の外周面側に突出して塑性変形される。
【００１０】
コアブロック１を形成する電磁鋼板２の一例について、図３を用いて説明する。コアブロック１は、電磁鋼板Ａ及びＢを交互に積層して形成される。電磁鋼板Ａ２ａは、図３（ａ）に示すように、コアブロック積層時に隣に位置するコアブロックを形成する電磁鋼板に接する面の一方に突出折曲片３ａ及び溝部４ａを設け、他方には切欠部５ａを設けている。突出折曲片３ａは、突出部３１ａ及び折曲部３２ａとからなり、コアブロック１に積層すると櫛状部１１となる。折曲部３１ａの形状を切欠部５ａの形状に対応するように形成すると、隣合う電磁鋼板における突出部３１ａと切欠部５ａとの接触部分に隙間が生じないようにすることができる。折曲部３２ａは、分割形ステータコアに組合せた後、折曲げられる。溝部４ａは、上層又は下層に積層される電磁鋼板２の折曲部３２が折曲げられて挿入される。突出折曲片３ａ、溝部４ａ及び切欠部５ａは、電磁鋼板２を電磁鋼板帯体から打抜く工程で形成される。電磁鋼板Ｂ２ｂは、図３（ｂ）に示すように、電磁鋼板Ａ２ａと左右対称の位置にそれぞれ突出折曲片３ｂ、溝部４ｂ及び切欠部５ｂを設けている。電磁鋼板Ｂ２ｂの突出折曲片３ｂも、同様に突出部３１ｂ及び折曲部３２ｂとからなる。電磁鋼板Ａ２ａとＢ２ｂとを交互に積層してコアブロック１に形成すると、突出折曲片３ａ、３ｂ及び切欠部５ａ、５ｂにより、櫛状部１１を有するコアブロック１を形成することが出来る。
【００１１】
隣合うコアブロックの櫛状部同士の噛合せについて、図４を用いて説明する。櫛状部１１同士を噛合せると、突出折曲片３の突出部３１と切欠部５との隙間が生じないため、隣合うコアブロック１の接する面を密着させることができる。そして、隣接するコアブロック１の外周面側に飛び出した突出折曲片３の折曲部３２を、例えばロール成形で同一方向に塑性変形させて折曲げる。折曲部３２は、折曲されると、下層に積層された電磁鋼板２ｃの溝部４ｃに挿入される。溝部４は、上層に積層された電磁鋼板（図示していない。）の折曲された折曲部３２ｄが挿入される。溝部４ｃ、４に挿入されるため、折曲部３２、３２ｄは、分割形ステータコアの外周面から飛び出す部分はない。折曲部３２の折曲方向としては、下層又は上層側とすることができる。
【００１２】
コアブロック１の形状は、ドーナツ形状のステータコアを構成した時の中心からの放射線状に分割された扇形をしているため、組合せた状態のコアブロック１は内径方向に相対的に移動することは無く、また、折曲部３２は、互いに隣合ったコアブロック１を構成する電磁鋼板２の外周面側に形成された溝部４に挿入されて密着するため、コアブロック１が外周方向に相対的に膨らむことが無い。そして、櫛状部１１によりスラスト方向にずれることはなく、溝部４に挿入された折曲部３２により円周方向に離れることはない。
【００１３】
積層されたコアブロックを、本実施例では１２個のコアブロックを同様に組合せることにより、図１に示すような円筒状の分割形ステータコアを形成することが出来る。
また、本実施例によれば、溶接等を使用しないで、そして、新たな部品を用いないで、モータ等の分割形ステータコアを提供することができる。
【００１４】
【発明の効果】
本発明によれば、製造コストの低減を図って、モータ等の分割形ステータコアを提供することができる。
【図面の簡単な説明】
【図１】実施例の分割形ステータコアの斜視説明図。
【図２】実施例の分割形ステータコアを構成するコアブロックの一例の説明図。
【図３】実施例におけるコアブロックに使用される電磁鋼板の一例の説明図。
【図４】実施例におけるコアブロックの組立状態の部分説明図。
【図５】従来技術による溶接構造のステータコアの部分説明図。
【符号の説明】
１ コアブロック、
２、２ａ、２ｂ、２ｃ 電磁鋼板
３、３ａ、３ｂ 突出折曲片
３１、３１ａ、３１ｂ 突出部
３２、３２ａ、３２ｂ 折曲部
４、４ａ、４ｂ 溝部
５、５ａ、５ｂ 切欠部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for providing a segmented stator core.
[0002]
[Prior art]
Conventionally, as a method of manufacturing a split-type stator core, when an electromagnetic steel sheet is punched by a press, several core blocks 1 'are formed by laminating a plurality of core blocks by internal lamination or laser welding or the like. It is well known that the stator cores are formed by arranging them in a cylindrical shape and welding and fixing the mating portions 6 'to each other as shown in FIG. As a method other than welding, it is also known to fix a core block to form a stator core by press-fitting or shrink-fitting a cylinder around the outer periphery of a cylindrically arranged core block. It has also been proposed to assemble the inserted split laminated core with a through bolt (Japanese Patent Application Laid-Open No. 7-222383).
[0003]
However, in the method of fixing the core block by welding, since the laminated magnetic steel sheets are in an electrically conductive state with each other, there is a disadvantage that the electrical characteristics are inferior to those in which only the magnetic steel sheets are stacked. . In addition, the method of press-fitting or shrink-fitting a cylinder on the outer periphery of the core or using a through bolt has a problem that a new component is required and the cost is increased.
[0004]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art, and does not reduce electrical characteristics because welding is not used, and can suppress an increase in manufacturing cost because no new parts are used. An object of the present invention is to provide a split stator core for a motor or the like.
[0005]
[Means for Solving the Problems]
The present invention provides a split stator core comprising a combination of a plurality of core blocks laminated with electromagnetic steel sheets, wherein the core block has a comb-shaped portion that is plastically deformed by protruding outside the adjacent core block. It is a stator core.
[0006]
Further, the present invention is the split-type stator core, wherein the electromagnetic steel sheet has a protruding bent piece or a cutout portion on a surface of the adjacent core block in contact with the electromagnetic steel sheet.
[0007]
The present invention is the split stator core, wherein the electromagnetic steel sheet has a groove into which the protruding bent piece of the upper or lower electromagnetic steel sheet is bent and inserted.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described.
An embodiment of the split stator core of the present invention will be described with reference to FIGS. FIG. 1 is a perspective explanatory view of a split stator core of an embodiment. FIG. 2 is an explanatory diagram of an example of a core block constituting the split stator core of the embodiment. FIG. 3 is a diagram illustrating an example of an electromagnetic steel sheet used for a core block according to the embodiment. FIG. 4 is a partial explanatory view of the assembled state of the core block in the embodiment.
[0009]
An embodiment of the split stator core of the present invention will be described. As shown in FIG. 1, the split stator core of the present embodiment is configured by combining 12 core blocks 1. As shown in FIG. 2, each core block 1 is made of a laminated body of electromagnetic steel sheets 2 and has a comb-shaped portion 3. The comb-shaped portion 3 is a protruding bent piece of the electromagnetic steel plate 2, and protrudes toward the outer peripheral surface side of the adjacent core block 1 during combination to be plastically deformed.
[0010]
An example of the electromagnetic steel sheet 2 forming the core block 1 will be described with reference to FIG. The core block 1 is formed by alternately stacking electromagnetic steel sheets A and B. As shown in FIG. 3 (a), the electromagnetic steel sheet A2a is provided with a protruding bent piece 3a and a groove 4a on one of the surfaces in contact with the electromagnetic steel sheet forming the adjacent core block when the core blocks are stacked, and on the other side. A notch 5a is provided. The protruding bent piece 3a is composed of a protruding part 31a and a bent part 32a. By forming the shape of the bent portion 31a so as to correspond to the shape of the cutout portion 5a, it is possible to prevent a gap from being formed at a contact portion between the protruding portion 31a and the cutout portion 5a in the adjacent electromagnetic steel plates. The bent portion 32a is bent after being combined with the split stator core. The groove portion 4a is inserted by bending the bent portion 32 of the electromagnetic steel sheet 2 laminated on the upper layer or the lower layer. The protruding bent piece 3a, the groove 4a, and the notch 5a are formed in a step of punching the electromagnetic steel sheet 2 from the electromagnetic steel sheet strip. As shown in FIG. 3B, the electromagnetic steel sheet B2b is provided with a protruding bent piece 3b, a groove 4b, and a notch 5b at positions symmetrical to the electromagnetic steel sheet A2a. The protruding bent piece 3b of the electromagnetic steel sheet B2b also includes a protruding portion 31b and a bent portion 32b. When the electromagnetic steel sheets A2a and B2b are alternately laminated to form the core block 1, the protruding bent pieces 3a, 3b and the cutouts 5a, 5b can form the core block 1 having the comb-like portion 11.
[0011]
The engagement between the comb-shaped portions of adjacent core blocks will be described with reference to FIG. When the comb-shaped portions 11 are engaged with each other, no gap is formed between the protruding portion 31 of the protruding bent piece 3 and the notch portion 5, so that the surfaces of the adjacent core blocks 1 can be in close contact. Then, the bent portion 32 of the protruding bent piece 3 protruding to the outer peripheral surface side of the adjacent core block 1 is plastically deformed and bent in the same direction by, for example, roll forming. When bent, the bent portion 32 is inserted into the groove portion 4c of the electromagnetic steel plate 2c stacked on the lower layer. The groove 4 is inserted with a bent portion 32d of an electromagnetic steel plate (not shown) laminated on the upper layer. Since the bent portions 32 and 32d are inserted into the grooves 4c and 4, there is no portion that protrudes from the outer peripheral surface of the split stator core. The bending direction of the bent portion 32 can be the lower layer or the upper layer.
[0012]
Since the shape of the core block 1 is a fan shape divided radially from the center when a donut-shaped stator core is formed, the combined core block 1 cannot relatively move in the radial direction. Further, since the bent portion 32 is inserted into and closely adheres to the groove 4 formed on the outer peripheral surface side of the electromagnetic steel plate 2 constituting the core block 1 adjacent to each other, the core block 1 is relatively moved in the outer peripheral direction. No swelling. Then, there is no deviation in the thrust direction due to the comb-like portion 11, and there is no deviation in the circumferential direction due to the bent portion 32 inserted into the groove portion 4.
[0013]
The laminated core block, by causing Similarly union twelve core block in the present embodiment, it is possible to form a cylindrical segmented stator core as shown in FIG.
Further, according to the present embodiment, it is possible to provide a split stator core for a motor or the like without using welding or the like and without using new parts .
[0014]
【The invention's effect】
According to the present invention, it is possible to provide a split stator core for a motor or the like while reducing the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view of a split stator core according to an embodiment.
FIG. 2 is an explanatory diagram of an example of a core block constituting the split stator core of the embodiment.
FIG. 3 is an explanatory view of an example of an electromagnetic steel sheet used for a core block in the embodiment.
FIG. 4 is a partial explanatory view of an assembled state of a core block in the embodiment.
FIG. 5 is a partial explanatory view of a stator core having a welding structure according to a conventional technique.
[Explanation of symbols]
1 core block,
2, 2a, 2b, 2c Electromagnetic steel sheets 3, 3a, 3b Projected bent pieces 31, 31a, 31b Projected parts 32, 32a, 32b Folded parts 4, 4a, 4b Grooves 5, 5a, 5b Notch

Claims (3)

電磁鋼板を積層したコアブロックを複数個組み合せて構成する分割形ステータコアにおいて、
前記コアブロックは、隣に位置するコアブロックの外周面側に突出する櫛状部分を有することを特徴とする分割形ステータコア。In a split type stator core configured by combining a plurality of core blocks laminated with electromagnetic steel sheets,
The split stator core according to claim 1, wherein the core block has a comb-shaped portion protruding toward an outer peripheral surface of an adjacent core block. 請求項１記載の分割形ステータコアにおいて、
上記電磁鋼板は、隣に位置するコアブロックに積層された電磁鋼板に接する面に突出折曲片、又は切欠部を有することを特徴とする分割形ステータコア。The split stator core according to claim 1,
The electromagnetic steel sheet is segmented stator core, characterized in that it comprises protruding bent piece on the surface in contact with the electromagnetic steel plates stacked in the core block located next to, or a notch. 請求項２記載の分割形ステータコアにおいて、
上記電磁鋼板は、上層又は下層の電磁鋼板の突出折曲片を折曲げた折曲部が接する溝部を有することを特徴とする分割形ステータコア。The split stator core according to claim 2,
The split type stator core according to claim 1, wherein the electromagnetic steel sheet has a groove in which a bent portion formed by bending a projecting bent piece of an upper or lower electromagnetic steel sheet is in contact .
JP09458399A 1999-04-01 1999-04-01 Split stator core Expired - Fee Related JP3604946B2 (en)

Priority Applications (1)

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JP3604946B2 true JP3604946B2 (en) 2004-12-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014166095A (en) * 2013-02-27 2014-09-08 Mitsubishi Electric Corp Stator, sealed compressor and motor equipped with the same, and mold
CN109478808A (en) * 2016-07-18 2019-03-15 根特大学 Stator and its production method for axial flux machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3749444B2 (en) * 2001-03-15 2006-03-01 三菱電機株式会社 core
JP4927134B2 (en) * 2003-05-08 2012-05-09 アスモ株式会社 Rotating electric machine stator
JP5322138B2 (en) * 2006-11-28 2013-10-23 株式会社三井ハイテック Laminated iron core
JP5094257B2 (en) * 2007-07-25 2012-12-12 三菱電機株式会社 Rotating electrical iron core
US9099897B2 (en) 2011-09-13 2015-08-04 L.H. Carbide Corporation Method for connecting end sections of an annular laminated article and articles made therefrom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014166095A (en) * 2013-02-27 2014-09-08 Mitsubishi Electric Corp Stator, sealed compressor and motor equipped with the same, and mold
CN109478808A (en) * 2016-07-18 2019-03-15 根特大学 Stator and its production method for axial flux machine
CN109478808B (en) * 2016-07-18 2020-12-25 根特大学 Stator for axial flux machine and method for producing the same

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