JP3370303B2 - Laminated core - Google Patents
Laminated coreInfo
- Publication number
- JP3370303B2 JP3370303B2 JP31334999A JP31334999A JP3370303B2 JP 3370303 B2 JP3370303 B2 JP 3370303B2 JP 31334999 A JP31334999 A JP 31334999A JP 31334999 A JP31334999 A JP 31334999A JP 3370303 B2 JP3370303 B2 JP 3370303B2
- Authority
- JP
- Japan
- Prior art keywords
- convex
- convex portion
- core
- concave
- laminated
- 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 - Lifetime
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、複数のコア片が
連結部を介して連結される帯状のコア部材を、各コア片
の積層方向に相隣なる縁部同士が重なり合うように積層
し、連結部を回転させることにより環状に形成して、例
えば電動機、変成器等の主要部を構成する積層鉄心に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stacking a band-shaped core member in which a plurality of core pieces are connected via a connecting portion such that adjacent edges of the core pieces in the stacking direction overlap each other. The present invention relates to a laminated iron core which is formed into an annular shape by rotating a connecting portion and constitutes a main portion of, for example, an electric motor or a transformer.
【０００２】[0002]
【従来の技術】例えば、同一出願人による特願平１１−
５６７７８号に提示のこの種の従来の積層鉄心は、図１
２に示すように、各コア片１が各端面１ａ、１ｂを介し
て帯状に、且つお互い長手方向に互い違いに整列配置さ
れた第１および第２のコア部材２、３を、順送プレス打
ち抜きにより形成して交互に積層し、積層方向に相隣な
るコア片１同士の凹部１ｃおよび凸部１ｄを嵌合させて
回転自在に連結することによりコア部材４を形成した
後、このコア部材４の各連結部の凹部１ｃおよび凸部１
ｄを回転させて、図１３に示すように環状に屈曲させる
ことにより構成されている。2. Description of the Related Art For example, Japanese Patent Application No. 11-
A conventional laminated iron core of this kind presented in No. 56778 is shown in FIG.
As shown in FIG. 2, the first and second core members 2 and 3 in which the core pieces 1 are arranged in a strip shape with the end faces 1a and 1b arranged in a staggered manner in the longitudinal direction, are sequentially press-punched. The core member 4 is formed by alternately laminating the core members 4 and the recesses 1c and the protrusions 1d of the core pieces 1 adjacent to each other in the stacking direction are fitted and rotatably connected to each other. The concave portion 1c and the convex portion 1 of each connecting portion of
It is configured by rotating d and bending it in an annular shape as shown in FIG.
【０００３】[0003]
【発明が解決しようとする課題】従来の積層鉄心は以上
のように構成され、連結部をコア片１の一端側表裏面の
所定の位置に形成されコア片１の積層方向に相隣なる同
士が嵌合可能な凹部１ｃおよび凸部１ｄで連結部を構成
することにより、複数回の回転にも耐えることができる
ように成されている。しかしながら、テイース部５に巻
線（図示せず）を施した段階で、巻線の締付により積層
方向に圧縮力が働く。そして、この圧縮力により凹凸部
１ｃ、１ｄで構成される連結部の重なった面の摩擦力が
大きくなるため、回転させるのに大きな力が必要となり
組立が困難になる。また、大きな力で回転させることで
鉄心自身が変形して組立精度が低下し騒音の原因になる
等といった問題点があった。The conventional laminated iron core is constructed as described above, and the connecting portions are formed at predetermined positions on the front and back surfaces of one end side of the core piece 1 and are adjacent to each other in the laminating direction of the core piece 1. By configuring the connecting portion with the concave portion 1c and the convex portion 1d that can be fitted together, it is possible to withstand a plurality of rotations. However, when a winding (not shown) is applied to the tooth portion 5, a compressive force acts in the stacking direction by tightening the winding. The compressive force increases the frictional force of the overlapping surfaces of the connecting portions formed by the concave and convex portions 1c and 1d, so that a large force is required to rotate the assembly, which makes assembly difficult. Further, there is a problem in that the iron core itself is deformed by rotating with a large force, the assembly accuracy is reduced, and noise is caused.
【０００４】この発明は上記のような問題点を解消する
ためになされたもので、連結部の回転をスムーズにして
組立作業性の向上を図るとともに、組立精度を向上させ
て騒音の防止を図ることが可能な積層鉄心を提供するこ
とを目的とするものである。The present invention has been made in order to solve the above problems, and smoothes the rotation of the connecting portion to improve the assembling workability, and also improves the assembling accuracy to prevent noise. An object of the present invention is to provide a laminated iron core that can be manufactured.
【０００５】[0005]
【課題を解決するための手段】この発明の請求項１に係
る積層鉄心は、複数の板状のコア片を帯状に配列するこ
とによりコア部材を形成し、コア部材を各コア片の積層
方向に相隣なる縁部同士が重なり合うように積層して、
重なり合った両コア片の縁部の所定の位置に、嵌合する
ことにより両コア片を回転自在に連結する凹部および凸
部でなる連結部を形成するとともに、隣り合う連結部の
間の所定の位置に、嵌合することにより両コア片を固着
一体化する凹部および凸部でなる固着部を形成し、連結
部を回転させることにより環状に形成してなる積層鉄心
において、連結部の凹部および凸部間に形成される積層
方向の隙間の方が、固着部の凹部および凸部間に形成さ
れる積層方向の隙間より大に設定するようにしたもので
ある。A laminated iron core according to claim 1 of the present invention forms a core member by arranging a plurality of plate-shaped core pieces in a strip shape, and the core members are laminated in the laminating direction of each core piece. Stack so that adjacent edges overlap with each other,
At the predetermined positions of the overlapping edge portions of both core pieces, a connecting portion composed of a concave portion and a convex portion that rotatably connect both core pieces by fitting is formed, and a predetermined connecting portion between adjacent connecting portions is formed. In the laminated core formed by forming a fixed portion composed of a concave portion and a convex portion that fix and integrate both core pieces by fitting at a position, and form the annular shape by rotating the connecting portion, the concave portion of the connecting portion and the The gap in the stacking direction formed between the convex portions is set to be larger than the gap in the stacking direction formed between the concave portion and the convex portion of the fixing portion.
【０００６】又、この発明の請求項２に係る積層鉄心
は、請求項１において、各凹凸部を円形状で且つ連結部
の（凹部の深さ−凸部の高さ）の値の方が、固着部の
（凹部の深さ−凸部の高さ）の値より大に形成するよう
にしたものである。Further, in the laminated core according to claim 2 of the present invention, in the claim 1, each concavo-convex portion is circular, and the value of (concave depth-convex height) of the connecting portion is more preferable. , The depth of the fixed portion (the depth of the concave portion-the height of the convex portion) is made larger.
【０００７】又、この発明の請求項３に係る積層鉄心
は、請求項１において、各凹凸部を円形状で且つ連結部
の凸部の径をｄ12、凸部と凹部の径方向の隙間を
ｇ121、凹部の深さをＨ12とし、固着部の凸部の径をｄ
11、凸部と凹部の径方向の隙間をｇ11 1、凹部の深さを
Ｈ11としたときに、
ｇ121・Ｈ12／ｄ12＜ｇ111・Ｈ11／ｄ11
の関係を満足するように形成されていることを特徴とす
る請求項１記載の積層鉄心。According to a third aspect of the present invention, in the laminated core according to the first aspect, each concavo-convex portion is circular, the diameter of the convex portion of the connecting portion is d 12 , and the gap between the convex portion and the concave portion in the radial direction. Is g 121 , the depth of the concave portion is H 12, and the diameter of the convex portion of the fixed portion is d.
11 , when the radial gap between the convex portion and the concave portion is g 11 1 and the depth of the concave portion is H 11 , the relationship of g 121 · H 12 / d 12 <g 111 · H 11 / d 11 is satisfied. The laminated core according to claim 1, wherein the laminated core is formed as follows.
【０００８】又、この発明の請求項４に係る積層鉄心
は、請求項１において、各凹凸部を円形状で且つ固着部
の凸部の外周上または凹部の内周上に所定の間隔を介し
高さまたは深さ方向に延在する複数の突起または窪みを
形成するようにしたものである。According to a fourth aspect of the present invention, in the laminated core according to the first aspect, the concave and convex portions are formed in a circular shape, and a predetermined interval is provided on the outer circumference of the convex portion of the fixing portion or the inner circumference of the concave portion. A plurality of protrusions or depressions extending in the height or depth direction are formed.
【０００９】又、この発明の請求項５に係る積層鉄心
は、請求項１において、各凹凸部を円形状で且つ連結部
の凸部の高さの方が、固着部の凸部の高さより低く設定
するようにしたものである。According to a fifth aspect of the present invention, in the laminated iron core according to the first aspect, the convex and concave portions of each connecting portion are circular and the height of the convex portion of the connecting portion is higher than the height of the convex portion of the fixing portion. It is set to be low.
【００１０】又、この発明の請求項６に係る積層鉄心
は、請求項１において、各凹凸部を円形状で且つ連結部
は凹凸部の存在しない層を有するようにしたものであ
る。A laminated core according to a sixth aspect of the present invention is the laminated core according to the first aspect, wherein each concavo-convex portion is circular and the connecting portion has a layer having no concavo-convex portion.
【００１１】又、この発明の請求項７に係る積層鉄心
は、請求項６において、連結部の少なくとも最上、下層
には凹凸部が存在するようにしたものである。Further, a laminated iron core according to a seventh aspect of the present invention is the laminated core according to the sixth aspect, wherein at least the uppermost and lower layers of the connecting portion have uneven portions.
【００１２】[0012]
【発明の実施の形態】実施の形態１．以下、この発明の
実施の形態を図に基づいて説明する。図１はこの発明の
実施の形態１における積層鉄心の構成を示す平面図、図
２はコア部材が積層された状態を示す平面図、図３は図
２における線III−IIIに沿った断面を示す断面図、図４
はこの発明の定義を説明するための図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. An embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view showing the structure of a laminated iron core according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing a state in which core members are laminated, and FIG. 3 is a cross section taken along line III-III in FIG. Sectional view shown in FIG.
FIG. 4 is a diagram for explaining the definition of the present invention.
【００１３】図において、６は磁性材料でなる板状のコ
ア片で、一端側裏表面に連結部としての凹部６ａおよび
凸部６ｂが形成されるとともに、その端面６ｃは円弧状
に形成され、他端側には相隣なるコア片６の端面６ｃと
嵌合可能な端面６ｄが形成されており、また、連結部間
に形成され巻線（図示せず）が施されるテイース部７に
は、固着部としての凹部７ａおよび凸部７ｂが形成され
ている。８は複数のコア片６が各端面６ｃ、６ｄを介し
て配列された第１のコア部材である。In the figure, reference numeral 6 denotes a plate-shaped core piece made of a magnetic material. A concave portion 6a and a convex portion 6b as connecting portions are formed on the back surface at one end side, and an end surface 6c thereof is formed in an arc shape. On the other end side, an end surface 6d which can be fitted with the end surface 6c of the adjacent core piece 6 is formed, and the teeth portion 7 formed between the connecting portions and provided with the winding (not shown) is provided. Is formed with a concave portion 7a and a convex portion 7b as fixed portions. Reference numeral 8 is a first core member in which a plurality of core pieces 6 are arranged via respective end faces 6c and 6d.
【００１４】９は各コア片６が第１のコア部材８とは長
手方向に互い違いに配列された第２のコア部材で、第１
のコア部材８と交互に積層され積層方向に相隣なるコア
片６同士の凹部６ａおよび凸部６ｂが嵌合されることに
より回転自在に連結されるとともに、積層方向に相隣な
るテイース部７同士の凹部７ａおよび凸部７ｂが嵌合さ
れ抜きかしめされることにより固着一体化されている。
１０は各テイース部７に巻線（図示せず）が施された
後、各コア片６の凹凸部６ａ、６ｂを回転させることに
よって環状に形成された積層鉄心である。Reference numeral 9 is a second core member in which the respective core pieces 6 are arranged alternately with the first core member 8 in the longitudinal direction.
Of the core members 8 that are alternately laminated and are adjacent to each other in the stacking direction, are fitted rotatably by the recesses 6a and the protrusions 6b of the core pieces 6 that are adjacent to each other in the stacking direction. The concave portions 7a and the convex portions 7b are fitted to each other and fixedly integrated by pulling out and caulking.
Reference numeral 10 denotes a laminated iron core formed into an annular shape by rotating the uneven portions 6a and 6b of each core piece 6 after winding (not shown) on each of the teeth portions 7.
【００１５】この発明の実施の形態１における積層鉄心
は上記のように構成され、さらに上記では説明しなかっ
たが、図４に示すように連結部における凹部６ａおよび
凸部６ｂ間に形成される積層方向の隙間ｇ6の方が、固
着部における凹部７ａおよび凸部７ｂ間に形成される積
層方向の隙間ｇ7より大に、すなわち、換言すれば、連
結部の(凹部６ａの深さＨ6−凸部６ｂの高さｈ6)の値の
方が、固着部の(凹部７ａの深さＨ7−凸部７ｂの高さｈ
7)の値より大にそれぞれ形成されている。なお、これら
両隙間ｇ6、ｇ7は、コア片６間の積層方向に形成される
隙間をｘとすると次式で与えられる。
ｇ6＝ｘ＋Ｈ6−ｈ6
ｇ7＝ｘ＋Ｈ7−ｈ7 The laminated iron core according to the first embodiment of the present invention is configured as described above, and although not described above, it is formed between the concave portion 6a and the convex portion 6b in the connecting portion as shown in FIG. The gap g 6 in the stacking direction is larger than the gap g 7 in the stacking direction formed between the concave portion 7a and the convex portion 7b in the fixed portion, in other words, (the depth H of the concave portion 6a of the connecting portion. 6 - towards the height values of h 6) of the convex portion 6b has a depth H 7 anchor portion of the (recess 7a - the height h of the convex portion 7b
It is formed larger than the value of 7 ). The gaps g 6 and g 7 are given by the following equations, where x is the gap formed in the stacking direction between the core pieces 6. g 6 = x + H 6 -h 6 g 7 = x + H 7 -h 7
【００１６】このように上記実施の形態１によれば、連
結部の（凹部６ａの深さＨ6−凸部６ｂの高さｈ6）の値
の方が、固着部の（凹部７ａの深さＨ7−凸部７ｂの高
さｈ 7）の値より大、すなわち、連結部における凹部６
ａおよび凸部６ｂ間に形成される積層方向の隙間ｇ6の
方が、固着部におけるその隙間ｇ7より大となるよう
に、各凹凸部６ａ、７ａ、６ｂ、７ｂの寸法を設定して
いるので、巻線（図示せず）の締付力によって固着部が
圧縮され、小さい側の隙間ｇ7が無くなって各凹凸部７
ａ、７ｂが当接した状態となっても、隙間ｘが存在し且
つ連結部の大きい側の隙間ｇ6は依然として存在し積層
方向に無理な力がかかることもないため、連結部をスム
ーズに回転させることができるようになり組立作業性の
向上を図ることが可能となり、さらに又、組立精度を向
上させて騒音の防止を図ることも可能になる。As described above, according to the first embodiment, the connection is
(The depth H of the recess 6a6-Height h of the convex portion 6b6)The value of the
Is the depth (H of the recess 7a) of the fixed portion.7-The height of the convex portion 7b
H 7) Value, that is, the concave portion 6 at the connecting portion.
The gap g in the stacking direction formed between a and the convex portion 6b6of
Is the gap g at the fixed part7To be greater
Then, set the dimensions of the uneven portions 6a, 7a, 6b, 7b.
Therefore, the tightening force of the winding (not shown)
Compressed, small gap g7There are no irregularities 7
Even if a and 7b come into contact with each other, there is a gap x and
Gap on the large side of the two connecting parts6Is still present and stacked
Since there is no unreasonable force applied in the direction,
It becomes possible to rotate it easily,
It is possible to improve the assembly accuracy.
It is also possible to raise the noise to prevent noise.
【００１７】実施の形態２．図５はこの発明の実施の形
態２における積層鉄心の要部の構成を示す断面図、図６
はこの発明の定義を説明するための図である。図におい
て、１１ａ、１１ｂは固着部における凹部および凸部、
１２ａ、１２ｂは連結部における凹部および凸部であ
り、図６に示すように連結部の凹部１２ａおよび凸部１
２ｂで形成される径方向の隙間ｇ121の方が、固着部の
凹部１１ａおよび凸部１１ｂで形成される径方向の隙間
ｇ111よりも小となるように、又、各凸部１１ｂ、１２
ｂの径ｄ1、ｄ2および各凹部１１ａ、１２ａの深さ
Ｈ11、Ｈ12は等しくそれぞれ形成されている。ここで、
径方向の各隙間ｇ111、ｇ121が各径ｄ11、ｄ12に比べて
十分に小さい場合、各凸部１１ｂ、１２ｂと各凹部１１
ａ、１２ａの体積がそれぞれ等しいことから、連結部の
（凸部１２ｂの高さｈ12−凹部１２ａの深さＨ12）およ
び、固着部の（凸部１１ｂの高さｈ11−凹部１１ａの深
さＨ11）はそれぞれ次式で与えられる。
ｈ12−Ｈ12＝ｇ121・Ｈ12／ｄ12
ｈ11−Ｈ11＝ｇ111・Ｈ11／ｄ11
そして、Ｈ12はＨ11と、ｄ12はｄ11とそれぞれ等しく、
ｇ121はｇ111より小さいので、連結部の（ｈ12−Ｈ12）
の値は固着部の（ｈ11−Ｈ11）の値よりも小となり、そ
の結果、連結部の積層方向の隙間ｇ122の方が固着部の
積層方向の隙間ｇ112よりも大となる。Embodiment 2. FIG. 5 is a sectional view showing the structure of the main part of the laminated iron core according to the second embodiment of the present invention.
FIG. 4 is a diagram for explaining the definition of the present invention. In the figure, 11a and 11b are concave portions and convex portions in the fixing portion,
Reference numerals 12a and 12b denote concave portions and convex portions of the connecting portion, and as shown in FIG. 6, the concave portion 12a and the convex portion 1 of the connecting portion.
As towards the radial gap g 121 formed by 2b becomes smaller than the radial gap g 111 formed by the recesses 11a and protrusions 11b of the fixing portion, also, the convex portions 11b, 12
The diameters d 1 and d 2 of b and the depths H 11 and H 12 of the recesses 11a and 12a are equal to each other. here,
When the radial gaps g 111 and g 121 are sufficiently smaller than the diameters d 11 and d 12 , the convex portions 11b and 12b and the concave portions 11 are formed.
Since the volumes of a and 12a are equal to each other, (the height h 12 of the convex portion 12b−the depth H 12 of the concave portion 12a) of the connecting portion and the (height h 11 of the convex portion 11b−the concave portion 11a of the fixing portion are The depth H 11 ) is given by the following equations. h 12 -H 12 = g 121 · H 12 / d 12 h 11 -H 11 = g 111 · H 11 / d 11 Then, H 12 and H 11, d 12 are each equal to d 11,
Since g 121 is smaller than g 111 , (h 12 -H 12 ) of the connecting part
Is smaller than the value of (h 11 −H 11 ) of the fixed portion, and as a result, the gap g 122 of the connecting portion in the stacking direction is larger than the gap g 112 of the fixed portion in the stacking direction.
【００１８】このように上記実施の形態２によれば、連
結部の積層方向の隙間ｇ122の方が、固着部の積層方向
の隙間ｇ112よりも大となるので、巻線（図示せず）の
締付によって固着部が圧縮されると、積層方向に小さな
隙間ｇ112を有した固着部側の各凹凸部１１ａ、１１ｂ
が容易に当接した状態となり、積層方向に大きな隙間ｇ
122を有する連結部側の各凹凸部１２ａ、１２ｂ間には
積層方向の隙間が残されて、積層方向に無理な力がかか
ることもないため、連結部をスムーズに回転させること
ができるようになり組立作業性の向上を図ることが可能
となる。さらに又、組立精度を向上させて騒音の防止を
図ることも可能になる。As described above, according to the second embodiment, since the gap g 122 in the stacking direction of the connecting portion is larger than the gap g 112 in the stacking direction of the fixed portion, the winding (not shown) is formed. When the fixing portion is compressed by tightening the), the uneven portions 11a and 11b on the fixing portion side having a small gap g 112 in the stacking direction are formed.
Easily come into contact with each other, and a large gap g
Since a gap in the stacking direction is left between the concave-convex portions 12a and 12b on the side of the connecting portion having 122 , an unreasonable force is not applied in the stacking direction, so that the connecting portion can be smoothly rotated. It is possible to improve the assembly workability. Furthermore, it is possible to improve the assembly accuracy and prevent noise.
【００１９】実施の形態３．図７はこの発明の実施の形
態３における積層鉄心の要部の構成を示す断面図、図８
はこの発明の実施の形態３における積層鉄心の要部の図
７とは異なる構成を示す断面図である。図７において、
１３ａは固着部における凹部、１３ｂは固着部における
凸部で、外周上に所定の間隔を介し高さ方向に延在する
複数の突起１４が形成されている。そして、凸部１３ｂ
の外径を凹部１３ａの内径と等しくし、突起１４により
凸部１３ｂの断面積を凹部１３ａの断面積より小さくす
ることで、凹部１３ａの深さよりも凸部１３ｂの高さよ
りも大とし、上記実施の形態１におけると同様に、連結
部の凹部１５ａおよび凸部１５ｂで形成される積層方向
の隙間の方が、固着部の凹部１３ａおよび凸部１３ｂで
形成される積層方向の隙間よりも大に形成される。Embodiment 3. FIG. 7 is a sectional view showing a structure of a main part of a laminated iron core according to a third embodiment of the present invention.
FIG. 9 is a sectional view showing a structure of a main part of a laminated iron core according to a third embodiment of the present invention, which is different from the structure shown in FIG. 7. In FIG.
Reference numeral 13a denotes a concave portion of the fixing portion, 13b denotes a convex portion of the fixing portion, and a plurality of protrusions 14 extending in the height direction are formed on the outer periphery at predetermined intervals. And the convex portion 13b
The outer diameter of the concave portion 13a is made equal to the inner diameter of the concave portion 13a, and the projection 14 makes the cross-sectional area of the convex portion 13b smaller than the cross-sectional area of the concave portion 13a, thereby making it larger than the depth of the concave portion 13a and higher than the height of the convex portion 13b. As in the first embodiment, the gap in the stacking direction formed by the concave portion 15a and the convex portion 15b of the connecting portion is larger than the gap in the stacking direction formed by the concave portion 13a and the convex portion 13b of the fixed portion. Is formed.
【００２０】このように上記実施の形態３によれば、固
着部における凸部１３ｂの外周上に所定の間隔を介し高
さ方向に延在する複数の突起１４を形成するとともに、
連結部の凸部１５ｂの高さと凹部１５ａの深さの差の方
が、固着部の凸部１３ｂの高さと凹部１３ａの深さの差
よりも小となるように、各凹凸部１３ａ、１５ａ、１３
ｂ、１５ｂの寸法を設定しているので、巻線（図示せ
ず）の締付力によって固着部が圧縮されると、固着部側
の各凹凸部１３ａ、１３ｂが容易に当接した状態とな
り、積層方向に大きな隙間を有する連結部側の各凹凸部
１５ａ、１５ｂ間にはこの隙間が残されて、積層方向に
無理な力がかかることもないため、連結部をスムーズに
回転させることができるようになり組立作業性の向上を
図ることが可能になるとともに、組立精度を向上させて
騒音の防止を図ることも可能になる。さらに又、突起１
４により固着部の抜きかしめをさらに強固なものとし、
機械的強度の向上を図ることが可能になる。As described above, according to the third embodiment, the plurality of protrusions 14 extending in the height direction are formed on the outer periphery of the convex portion 13b in the fixed portion at a predetermined interval.
Each of the concave-convex portions 13a and 15a has a height difference between the height of the convex portion 15b of the connecting portion and the depth of the concave portion 15a smaller than a height difference between the height of the convex portion 13b of the fixing portion and the depth of the concave portion 13a. , 13
Since the sizes of b and 15b are set, when the fixing portion is compressed by the tightening force of the winding (not shown), the uneven portions 13a and 13b on the fixing portion side easily come into contact with each other. Since there is no gap left between the concave-convex portions 15a and 15b on the side of the connecting portion having a large gap in the stacking direction and an unreasonable force is not applied in the stacking direction, the connecting portion can be smoothly rotated. As a result, it is possible to improve the assembling workability and improve the assembling accuracy to prevent noise. Furthermore, the protrusion 1
4 further strengthens the crimping of the fixed part,
It is possible to improve the mechanical strength.
【００２１】なお、上記図７における構成では、固着部
側の凸部１３ｂに突起１４を形成した場合について説明
したが、図８に示すように固着部側の凹部１３ａの内周
上に所定の間隔を介し深さ方向に延在する複数の窪み１
６を形成するようにしても良く、上記と同様の効果を発
揮し得ることは言うまでもない。In the structure shown in FIG. 7, the case where the protrusion 14 is formed on the convex portion 13b on the fixing portion side has been described, but as shown in FIG. 8, a predetermined portion is formed on the inner circumference of the concave portion 13a on the fixing portion side. A plurality of depressions 1 extending in the depth direction through the spaces 1
It is needless to say that 6 may be formed and the same effect as described above can be exhibited.
【００２２】実施の形態４．図９はこの発明の実施の形
態４における積層鉄心の要部の構成を示す断面図であ
る。図において、１７ａ、１７ｂは固着部における凹部
および凸部、１８ａ、１８ｂは連結部における凹部およ
び凸部であり、連結部における凸部１８ｂの高さＨ 18の
方が、固着部における凸部１７ｂの高さＨ17より低く形
成されている。Fourth Embodiment FIG. 9 shows an embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a configuration of a main part of a laminated iron core in state 4
It In the figure, 17a and 17b are recesses in the fixing portion.
And convex portions, 18a and 18b are concave portions and connecting portions.
And the height H of the convex portion 18b at the connecting portion. 18of
Is the height H of the convex portion 17b at the fixed portion.17Lower shape
Is made.
【００２３】このように上記実施の形態４によれば、連
結部における凸部１８ｂの高さＨ18の方が、固着部にお
ける凸部１７ｂの高さＨ17より低く形成しているので、
上記実施の形態２で説明したように（凸部の高さ−凹部
の深さ）の値が連結部よりも固着部の方が大となり巻線
（図示せず）の締付力によって固着部が圧縮されると、
凸部１７ｂの高さＨ18の高い方の固着部側の各凹凸部１
７ａ、１７ｂが容易に当接した状態となり、凸部１８ｂ
の高さＨ17が低い方の連結部側の各凹凸部１８ａ、１８
ｂ間には積層方向の隙間が残され、積層方向に無理な力
がかかることもないため、連結部をスムーズに回転させ
ることができるようになり組立作業性の向上を図ること
が可能となる。さらに又、組立精度を向上させて騒音の
防止を図ることも可能になる。As described above, according to the fourth embodiment, the height H 18 of the convex portion 18b in the connecting portion is lower than the height H 17 of the convex portion 17b in the fixing portion.
As described in the second embodiment, the value of (height of convex portion-depth of concave portion) of the fixing portion is larger than that of the connecting portion, and the fixing portion is generated by the tightening force of the winding (not shown). Is compressed,
Concavo-convex portion 1 on the side of the fixed portion where the height H 18 of the convex portion 17b is higher
7a and 17b easily come into contact with each other, and the convex portion 18b
Each of the concavo-convex portions 18a, 18 on the side of the connecting portion whose height H 17 is low
Since a gap in the stacking direction is left between b and an unreasonable force is not applied in the stacking direction, the connecting portion can be smoothly rotated and the assembling workability can be improved. . Furthermore, it is possible to improve the assembly accuracy and prevent noise.
【００２４】実施の形態５．図１０はこの発明の実施の
形態５における積層鉄心の要部の構成を示す断面図、図
１１はこの発明の実施の形態５における積層鉄心の要部
の図１０とは異なる構成を示す断面図である。図１０に
おいて、１９ａ、１９ｂは連結部における凹部および凸
部、２０ａ、２０ｂは固着部における凹部および凸部
で、連結部側の凹凸部１９ａ、１９ｂは所定の層のみに
設けられ、凹凸部１９ａ、１９ｂの無い層が存在してい
る。Embodiment 5. FIG. 10 is a sectional view showing a structure of a main part of a laminated iron core according to a fifth embodiment of the present invention, and FIG. 11 is a sectional view showing a structure of a main part of a laminated iron core according to the fifth embodiment of the present invention different from FIG. Is. In FIG. 10, 19a and 19b are concave and convex portions in the connecting portion, 20a and 20b are concave and convex portions in the fixing portion, and the concave and convex portions 19a and 19b on the connecting portion side are provided only in a predetermined layer. , 19b is present.
【００２５】このように上記実施の形態５によれば、連
結部側の凹凸部１９ａ、１９ｂを所定の層のみに設け、
凹凸部１９ａ、１９ｂの無い層を存在させているので、
凹凸部１９ａ、１９ｂの無い分積層方向に無理な力がか
かることもないため、上記各実施の形態におけると同様
に、積層方向に無理な力がかかることもないため、連結
部をスムーズに回転させることができるようになり組立
作業性の向上を図ることが可能となる。さらに又、組立
精度を向上させて騒音の防止を図ることも可能になる。As described above, according to the fifth embodiment, the concavo-convex portions 19a and 19b on the connecting portion side are provided only in a predetermined layer,
Since the layer without the uneven portions 19a and 19b is present,
Since the undesired portions 19a and 19b do not apply an unreasonable force in the stacking direction, the undesired force is not applied in the stacking direction as in each of the above-described embodiments, so that the connecting portion smoothly rotates. It becomes possible to improve the assembling workability. Furthermore, it is possible to improve the assembly accuracy and prevent noise.
【００２６】なお、連結部側の凹凸部１９ａ、１９ｂを
設ける層を、図１１に示すように最上、下層とすること
により、組立作業性の向上ならびに騒音の防止を図るこ
とが可能であることは勿論のこと、形態を保持するとい
う点で有利となる。It is possible to improve the assembling workability and prevent the noise by using the upper and lower layers as the layers for providing the concavo-convex portions 19a and 19b on the connecting portion side, as shown in FIG. Of course, it is advantageous in that the shape is retained.
【００２７】[0027]
【発明の効果】以上のように、この発明の請求項１によ
れば、複数の板状のコア片を帯状に配列することにより
コア部材を形成し、コア部材を各コア片の積層方向に相
隣なる縁部同士が重なり合うように積層して、重なり合
った両コア片の縁部の所定の位置に、嵌合することによ
り両コア片を回転自在に連結する凹部および凸部でなる
連結部を形成するとともに、両コア片の連結部間の所定
の位置に、嵌合することにより両コア片を固着一体化す
る凹部および凸部でなる固着部を形成し、連結部を回転
させることにより環状に形成してなる積層鉄心におい
て、連結部の凹部および凸部間に形成される積層方向の
隙間の方が、固着部の凹部および凸部間に形成される積
層方向の隙間より大に設定するようにしたので、組立作
業性の向上ならびに騒音の防止を図ることが可能な積層
鉄心を提供することができる。As described above, according to the first aspect of the present invention, a core member is formed by arranging a plurality of plate-shaped core pieces in a strip shape, and the core members are arranged in the laminating direction of each core piece. A connecting portion composed of a concave portion and a convex portion, which are laminated so that adjacent edge portions are overlapped with each other and are fitted at predetermined positions on the edge portions of the overlapping core pieces so as to rotatably connect the core pieces. In addition to forming a fixed portion composed of a concave portion and a convex portion, which are fixed to each other between the connecting portions of both core pieces by fitting, to form a fixed portion, which is a concave portion and a convex portion, and by rotating the connecting portion. In the laminated core formed in a ring shape, the gap in the stacking direction formed between the concave and convex portions of the connecting portion is set to be larger than the gap in the stacking direction formed between the concave and convex portions of the fixed portion. As a result, the assembly workability is improved and It is possible to provide a laminated core which can achieve prevention of sound.
【００２８】又、この発明の請求項２によれば、請求項
１において、各凹凸部を円形状で且つ連結部の（凹部の
深さ−凸部の高さ）の値の方が、固着部の（凹部の深さ
−凸部の高さ）の値より大に形成するようにしたので、
組立作業性の向上ならびに騒音の防止を図ることが可能
な積層鉄心を提供することができる。According to a second aspect of the present invention, in the first aspect, each concave-convex portion is circular, and the value of (concave depth-convex height) of the connecting portion is fixed. Since it is formed to be larger than the value of (the depth of the concave portion-the height of the convex portion) of the portion,
It is possible to provide a laminated iron core that can improve assembly workability and prevent noise.
【００２９】又、この発明の請求項３によれば、請求項
１において、各凹凸部を円形状で且つ連結部の凸部の径
をｄ12、凸部と凹部の径方向の隙間をｇ121、凹部の深
さをＨ12とし、固着部の凸部の径をｄ11、凸部と凹部の
径方向の隙間をｇ111、凹部の深さをＨ11としたとき
に、
ｇ121・Ｈ12／ｄ12＜ｇ111・Ｈ11／ｄ11
の関係を満足するように形成したので、組立作業性の向
上ならびに騒音の防止を図ることが可能な積層鉄心を提
供することができる。According to a third aspect of the present invention, in the first aspect, each concavo-convex portion is circular, the diameter of the convex portion of the connecting portion is d 12 , and the radial gap between the convex portion and the concave portion is g. 121, the depth of the recess and H 12, when d 11 diameter of the convex portion of the fixing portion, the radial gaps g 111 of the convex portion and the concave portion, the depth of the recess and H 11, g 121 · Since it is formed so as to satisfy the relationship of H 12 / d 12 <g 111 · H 11 / d 11 , it is possible to provide a laminated iron core capable of improving assembly workability and preventing noise.
【００３０】又、この発明の請求項４によれば、請求項
１において、各凹凸部を円形状で且つ固着部の凸部の外
周上または凹部の内周上に所定の間隔を介し高さまたは
深さ方向に延在する複数の突起または窪みを形成するよ
うにしたので、組立作業性の向上ならびに騒音の防止を
図ることが可能であることは勿論、機械的強度の向上を
図ることが可能な積層鉄心を提供することができる。Further, according to a fourth aspect of the present invention, in the first aspect, each of the concave and convex portions is circular and has a height on the outer circumference of the convex portion of the fixing portion or the inner circumference of the concave portion at a predetermined interval. Alternatively, since a plurality of protrusions or depressions extending in the depth direction are formed, it is possible to improve the assembly workability and prevent noise, and of course, improve the mechanical strength. A possible laminated iron core can be provided.
【００３１】又、この発明の請求項５によれば、請求項
１において、各凹凸部を円形状で且つ連結部の凸部の高
さの方が、固着部の凸部の高さより低く設定するように
したので、組立作業性の向上ならびに騒音の防止を図る
ことが可能な積層鉄心を提供することができる。According to a fifth aspect of the present invention, in the first aspect, each concave-convex portion is circular and the height of the convex portion of the connecting portion is set lower than the height of the convex portion of the fixing portion. By doing so, it is possible to provide a laminated core capable of improving assembly workability and preventing noise.
【００３２】又、この発明の請求項６によれば、請求項
１において、各凹凸部を円形状で且つ連結部は凹凸部の
存在しない層を有するようにしたので、組立作業性の向
上ならびに騒音の防止を図ることが可能な積層鉄心を提
供することができる。According to a sixth aspect of the present invention, in the first aspect, each concavo-convex portion has a circular shape, and the connecting portion has a layer having no concavo-convex portion. A laminated iron core capable of preventing noise can be provided.
【００３３】又、この発明の請求項７によれば、請求項
６において、連結部の少なくとも最上、下層には凹凸部
が存在するようにしたので、組立作業性の向上ならびに
騒音の防止を図ることが可能であることは勿論、形態保
持が有利な積層鉄心を提供することができる。According to a seventh aspect of the present invention, in the sixth aspect, since the concavo-convex portions are present at least at the uppermost and lower layers of the connecting portion, the assembling workability is improved and noise is prevented. Of course, it is possible to provide a laminated core in which shape retention is advantageous.
【図１】 この発明の実施の形態１における積層鉄心の
構成を示す平面図である。FIG. 1 is a plan view showing a structure of a laminated core according to a first embodiment of the present invention.
【図２】 コア部材が積層された状態を示す平面図であ
る。FIG. 2 is a plan view showing a state in which core members are laminated.
【図３】 図２における線III−IIIに沿った断面を示す
断面図である。FIG. 3 is a sectional view showing a section taken along line III-III in FIG.
【図４】 この発明の定義を説明するための図である。FIG. 4 is a diagram for explaining the definition of the present invention.
【図５】 この発明の実施の形態２における積層鉄心の
要部の構成を示す断面図である。FIG. 5 is a sectional view showing a configuration of a main part of a laminated iron core according to a second embodiment of the present invention.
【図６】 この発明の定義を説明するための図である。FIG. 6 is a diagram for explaining the definition of the present invention.
【図７】 この発明の実施の形態３における積層鉄心の
要部の構成を示す断面図である。FIG. 7 is a sectional view showing a configuration of a main part of a laminated iron core according to a third embodiment of the present invention.
【図８】 この発明の実施の形態３における積層鉄心の
要部の図７とは異なる構成を示す断面図である。FIG. 8 is a cross-sectional view showing a structure of a main part of a laminated iron core according to a third embodiment of the present invention, which is different from the structure shown in FIG. 7.
【図９】 この発明の実施の形態４における積層鉄心の
要部の構成を示す断面図である。FIG. 9 is a sectional view showing a configuration of a main part of a laminated iron core according to a fourth embodiment of the present invention.
【図１０】 この発明の実施の形態５における積層鉄心
の要部の構成を示す断面図である。FIG. 10 is a sectional view showing a configuration of a main part of a laminated iron core according to a fifth embodiment of the present invention.
【図１１】 この発明の実施の形態５における積層鉄心
の要部の図１０とは異なる構成を示す断面図である。FIG. 11 is a sectional view showing a structure of a main portion of a laminated iron core according to a fifth embodiment of the present invention, which is different from the structure shown in FIG.
【図１２】 従来の積層鉄心のコア部材が積層された状
態を示す平面図である。FIG. 12 is a plan view showing a state in which core members of a conventional laminated iron core are laminated.
【図１３】 従来の積層鉄心の構成を示す平面図であ
る。FIG. 13 is a plan view showing the structure of a conventional laminated core.
【図１４】 従来の積層鉄心の要部の構成を示す平面図
である。FIG. 14 is a plan view showing a configuration of a main part of a conventional laminated iron core.
【図１５】 従来の積層鉄心の要部の構成を示す断面図
である。FIG. 15 is a cross-sectional view showing a configuration of a main part of a conventional laminated iron core.
６ コア片、７ テイース部、６ａ，７ａ，１１ａ，１
２ａ，１３ａ，１５ａ，１７ａ，１８ａ，１９ａ，２０
ａ 凹部、６ｂ，７ｂ，１１ｂ，１２ｂ，１３ｂ，１５
ｂ，１７ｂ，１８ｂ，１９ｂ，２０ｂ 凸部、８ 第１
のコア部材、９ 第２のコア部材、１０ 積層鉄心、ｇ
6，ｇ7，ｇ111，ｇ121，ｇ112，ｇ122，ｘ 隙間、
Ｈ6，Ｈ7，Ｈ11，Ｈ12 深さ、ｈ6，ｈ7，ｈ11，ｈ12
高さ、ｄ11，ｄ12 径、１４ 突起、１６ 窪み。6 core pieces, 7 tooth portions, 6a, 7a, 11a, 1
2a, 13a, 15a, 17a, 18a, 19a, 20
a recess, 6b, 7b, 11b, 12b, 13b, 15
b, 17b, 18b, 19b, 20b convex portion, 8 first
Core member, 9 second core member, 10 laminated core, g
6 , g 7 , g 111 , g 121 , g 112 , g 122 , x gap,
H 6, H 7, H 11 , H 12 depth, h 6, h 7, h 11, h 12
Height, d 11 , d 12 diameter, 14 protrusions, 16 depressions.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中原 裕治 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 大田 順一 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 告井 督夫 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 荒井 利夫 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 野村 豊史 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 及川 智明 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 田島 庸賀 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (72)発明者 加藤 政紀 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (56)参考文献 特開 平５−300678（ＪＰ，Ａ) 特開2000−201457（ＪＰ，Ａ) 実開 昭61−134675（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 1/18 H02K 1/14 H02K 15/02 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yuji Nakahara 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. (72) Inventor Junichi Ota 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. (72) Inventor Masao Usai 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. (72) Inventor Toshio Arai 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Toyoshi Nomura 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Tomoaki Oikawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric (72) Inventor Yoga Tamura 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Masanori Kato Marunouchi, Chiyoda-ku, Tokyo Chome 2-3 Mitsubishi Electric Co., Ltd. (56) References JP-A-5-300678 (JP, A) JP-A-2000-201457 (JP, A) Actually open 61-134675 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) H02K 1/18 H02K 1/14 H02K 15/02
Claims (7)
とによりコア部材を形成し、上記コア部材を上記各コア
片の積層方向に相隣なる縁部同士が重なり合うように積
層して、上記重なり合った両コア片の縁部の所定の位置
に、嵌合することにより上記両コア片を回転自在に連結
する凹部および凸部でなる連結部を形成するとともに、
上記隣り合う連結部の間の所定の位置に、嵌合すること
により上記両コア片を固着一体化する凹部および凸部で
なる固着部を形成し、上記連結部を回転させることによ
り環状に形成してなる積層鉄心において、上記連結部の
凹部および凸部間に形成される積層方向の隙間の方が、
上記固着部の凹部および凸部間に形成される積層方向の
隙間より大に設定されていることを特徴とする積層鉄
心。1. A core member is formed by arranging a plurality of plate-shaped core pieces in a strip shape, and the core member is laminated so that adjacent edge portions in the laminating direction of the core pieces overlap each other. , At a predetermined position of the edge portions of the overlapping core pieces, by forming a connecting portion consisting of a concave portion and a convex portion that rotatably connect the both core pieces by fitting.
At a predetermined position between the adjacent connecting portions, a fixing portion formed by a concave portion and a convex portion for fixing and integrating the core pieces by fitting is formed, and is formed in an annular shape by rotating the connecting portion. In the laminated core formed by, the gap in the stacking direction formed between the concave portion and the convex portion of the connecting portion is
A laminated iron core, which is set to be larger than a gap in the laminating direction formed between the concave portion and the convex portion of the fixing portion.
の深さ−凸部の高さ）の値の方が、固着部の（凹部の深
さ−凸部の高さ）の値より大に形成されていることを特
徴とする請求項１記載の積層鉄心。2. Each concavo-convex portion has a circular shape, and the value of (depth of concave portion-height of convex portion) of the connecting portion is smaller than (depth of concave portion-height of convex portion) of the fixed portion. The laminated iron core according to claim 1, wherein the laminated iron core is formed to have a larger value.
径をｄ12、凸部と凹部の径方向の隙間をｇ121、凹部の
深さをＨ12とし、固着部の凸部の径をｄ11、凸部と凹部
の径方向の隙間をｇ111、凹部の深さをＨ11としたとき
に、 ｇ121・Ｈ12／ｄ12＜ｇ111・Ｈ11／ｄ11 の関係を満足するように形成されていることを特徴とす
る請求項１記載の積層鉄心。3. Each concavo-convex portion is circular and the diameter of the convex portion of the connecting portion is d 12 , the radial gap between the convex portion and the concave portion is g 121 , and the depth of the concave portion is H 12, and the convex portion of the fixed portion is convex. When the diameter of the portion is d 11 , the radial gap between the convex portion and the concave portion is g 111 , and the depth of the concave portion is H 11 , then g 121 · H 12 / d 12 <g 111 · H 11 / d 11 The laminated core according to claim 1, wherein the laminated core is formed so as to satisfy the relationship.
外周上または凹部の内周上に所定の間隔を介し高さまた
は深さ方向に延在する複数の突起または窪みが形成され
ていることを特徴とする請求項１記載の積層鉄心。4. Each concavo-convex portion is circular and has a plurality of protrusions or depressions extending in the height or depth direction on the outer circumference of the convex portion of the fixing portion or the inner circumference of the concave portion with a predetermined interval. The laminated iron core according to claim 1, wherein
高さの方が、固着部の凸部の高さより低く設定されてい
ることを特徴とする請求項１記載の積層鉄心。5. The laminated core according to claim 1, wherein each of the concavo-convex portions is circular, and the height of the convex portion of the connecting portion is set lower than the height of the convex portion of the fixing portion. .
凸部の存在しない層を有していることを特徴とする請求
項１記載の積層鉄心。6. The laminated core according to claim 1, wherein each of the concavo-convex portions has a circular shape, and the connecting portion has a layer having no concavo-convex portion.
部が存在していることを特徴とする請求項６記載の積層
鉄心。7. The laminated core according to claim 6, wherein at least the uppermost portion and the lower layer of the connecting portion have uneven portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31334999A JP3370303B2 (en) | 1999-11-04 | 1999-11-04 | Laminated core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31334999A JP3370303B2 (en) | 1999-11-04 | 1999-11-04 | Laminated core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001136686A JP2001136686A (en) | 2001-05-18 |
| JP3370303B2 true JP3370303B2 (en) | 2003-01-27 |
Family
ID=18040191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31334999A Expired - Lifetime JP3370303B2 (en) | 1999-11-04 | 1999-11-04 | Laminated core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3370303B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011155781A (en) * | 2010-01-28 | 2011-08-11 | Mitsubishi Electric Corp | Laminated core and stator |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4121008B2 (en) * | 2001-07-03 | 2008-07-16 | 三菱電機株式会社 | Stator and manufacturing method thereof, and stator core member manufacturing apparatus |
| JP4694253B2 (en) * | 2005-05-11 | 2011-06-08 | 三菱電機株式会社 | Permanent magnet rotating electric machine |
| JP4781197B2 (en) * | 2006-08-08 | 2011-09-28 | 三菱電機株式会社 | Divided laminated iron core and stator iron core of rotating electric machine using this divided laminated iron core |
| JP5975901B2 (en) * | 2013-02-14 | 2016-08-23 | アスモ株式会社 | Rotating electric machine |
| JP6338931B2 (en) * | 2014-05-27 | 2018-06-06 | 本田技研工業株式会社 | Rotating electrical machine rotor |
-
1999
- 1999-11-04 JP JP31334999A patent/JP3370303B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011155781A (en) * | 2010-01-28 | 2011-08-11 | Mitsubishi Electric Corp | Laminated core and stator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001136686A (en) | 2001-05-18 |
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