JP3622307B2 - Stator core of rotating electrical machine - Google Patents

Stator core of rotating electrical machine Download PDF

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Publication number
JP3622307B2
JP3622307B2 JP35314295A JP35314295A JP3622307B2 JP 3622307 B2 JP3622307 B2 JP 3622307B2 JP 35314295 A JP35314295 A JP 35314295A JP 35314295 A JP35314295 A JP 35314295A JP 3622307 B2 JP3622307 B2 JP 3622307B2
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Japan
Prior art keywords
laminated
core
iron core
screw holes
pair
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
JP35314295A
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Japanese (ja)
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JPH09191587A (en
Inventor
明秀 佐藤
克則 今地
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.)
Yaskawa Electric Corp
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Yaskawa Electric Corp
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Filing date
Publication date
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Priority to JP35314295A priority Critical patent/JP3622307B2/en
Publication of JPH09191587A publication Critical patent/JPH09191587A/en
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Publication of JP3622307B2 publication Critical patent/JP3622307B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、固定子鉄心の外側に外被を設けず、固定子鉄心が露出するようにしたフレームレスの回転電機の固定子鉄心に関する。
【0002】
【従来の技術】
従来、フレームレスの回転電機の固定子鉄心は、例えば図4および5図に示すように、角形状の外周部と複数個の巻線スロット11を配置した内周部を持つ薄鉄板を積層した積層鉄心1と、積層鉄心1を軸方向両側から圧縮保持するエンドリング2と、エンドリング2の外周面に跨って配設した複数個の結合部材3とを備え、結合部材3と積層鉄心1とを溶接によって固定したものが開示されている(例えば、特開平1−110031号)。
この場合、積層鉄心1およびエンドリング2には軸方向に貫通する冷却風穴12および21を設け、エンドリング2にはブラケットを固定するためのネジ穴22と、吊りボルト用ネジ穴23とを設けてある。
【0003】
【発明が解決しようとする課題】
ところが、上記従来技術では、エンドリングや結合部材などの機械加工部品が多く、コストが高くなるという問題があった。
また、結合部材と積層鉄心を溶接で固定するため、積層鉄心をけい素鋼板など表面に絶縁処理を施した薄鉄板で形成する場合は、積層鉄心に与える熱影響が大きく、積層鉄心の電気的特性が低下することがある。また、溶接作業前に仮組立をする必要があったり、溶接個所が多いため、多くの工数が係るという問題があった。
また、吊りボルト用ネジ穴をエンドリングに設けてあるので、エンドリングを薄くすることができず、したがって、巻線作業の際に巻線がエンドリングに当たって、巻線スロットへの挿入作業がやりにくいという問題もあった。
本発明は、部品点数や加工工数が少なく、剛性の高い回転電機の固定子鉄心を提供することを目的とするものである。
【0004】
【課題を解決するための手段】
上記課題を解決するため、本発明は、複数枚の薄鉄板を積層して形成した積層鉄心と、前記積層鉄心の軸方向の両端面に設けたエンドリングと、前記エンドリングの軸方向端面に設けたブラケット取り付け用ネジ穴と、前記積層鉄心の外周に設けた吊り上げボルト用ネジ穴とを備えた回転電機の固定子鉄心において、前記積層鉄心の外周に近い複数の位置に所定の間隔をおいて設けた1対の軸方向に貫通する貫通穴と、前記貫通穴の中に前記エンドリングと共にダイキャストによって形成した連結バーとを備え、前記ブラケット取り付け用ネジ穴を、前記各1対の連結バーの間に形成したものである。
また、前記吊り上げボルト用ネジ穴前記各1対の連結バーの間に形成したものである。
【0005】
【発明の実施の形態】
以下、本発明を図に示す実施例について説明する。
図1は本発明の実施例を示す図2のX−O−X’断面に沿う側断面図、図2はその正面図である。
図において、1は複数枚の薄鉄板10を積層して形成した積層鉄心、11は積層鉄心1の内周に電機子巻線を装着するために設けた複数個のスロット溝、12は積層鉄心1の円周方向に所定の角ピッチで離れた4個所の位置に設けた冷却風穴、13は積層鉄心1の外周に近い位置で、隣り合う冷却風穴13の間に、所定の間隔をおいて設けた1対の軸方向に貫通する貫通穴である。
2は積層鉄心1の軸方向の両端面に設けて、積層鉄心1を圧縮保持するエンドリングで、アルミニウム合金などのダイキャストによって形成されている。30は積層鉄心1に設けた1対の貫通穴13の中にエンドリング2と共にダイキャストによって充填された連結バーである。21はエンドリング2に設けた冷却風穴で、積層鉄心1に設けた冷却風穴と連通している。
22はエンドリング2に設けたネジ穴で、図3(a)に示すように、1対の連結バー30の間に配置され、エンドリング2を貫通し積層鉄心1まで通され、ブラケット(図示しない)を固定するようにしてある。
23は積層鉄心1の外周上部に設けた吊りボルト用のネジ穴で、図3(b),(c)に示すように、1対の連結バー30の間に配置されている。
なお、スロット溝11、冷却風穴12、貫通穴13は、薄鉄板10をプレスで成形する時に同時に加工し、積層することによって積層鉄心1に軸方向に貫通するようにしてある。
また、ネジ穴22および23は、積層鉄心1にエンドリング2および連結バー30をダイキャストによって形成した後、機械加工により形成する。
【0006】
このような構成により、連結バー30をダイキャストによって形成するため、連結バー30が冷却される途中に収縮し、積層鉄心1を軸方向に強固に圧縮・保持することができる。
またネジ穴22、23の両側にはダイキャストによって形成した連結バー30があるので、ネジ穴22、23の周囲の積層鉄心1が補強され、ネジ穴が強固となる。
したがって、吊りボルト用のネジ穴13をエンドリング2に設けることなく、積層鉄心1の任意の位置に設けることができるので、エンドリングを薄くすることができ、巻線の巻線スロットへの挿入作業が容易となる。
【0007】
【発明の効果】
以上述べたように、本発明によれば、ブラケットの取り付け用のネジ穴や吊りボルト用のネジ穴の両側に連結バーをダイキャストによって形成し、積層鉄心を軸方向に圧縮保持すると共に、ネジ穴の周囲を補強しているので、従来のような結合部材のような機械加工を要する部品がなくなり、エンドリングの厚さも薄くすることができて巻線挿入作業工数も低減でき、部品点数や加工工数が少なく、剛性の高い回転電機の固定子鉄心を提供できる効果がある。
【図面の簡単な説明】
【図1】本発明の実施例を示す図2のX−O−X’断面に沿う側断面図である。
【図2】本発明の実施例を示す正面図である。
【図3】本発明の実施例を示す(a)図2のA−A’断面に沿う要部側断面図、(b)図1のB−B’断面に沿う要部正断面図、(c)図2のC−C’断面に沿う側断面図である。
【図4】従来例を示す側断面図である。
【図5】従来例を示す正面図である。
【符号の説明】
1:積層鉄心、10:薄鉄板、11:巻線スロット、12、21:冷却風穴、13:貫通穴、2:エンドリング、22、23:ネジ穴、30:連結バー
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stator core of a frameless rotating electrical machine in which a stator core is exposed without providing a jacket on the outside of the stator core.
[0002]
[Prior art]
Conventionally, a stator core of a frameless rotating electrical machine is formed by laminating a thin iron plate having a square outer peripheral portion and an inner peripheral portion in which a plurality of winding slots 11 are arranged as shown in FIGS. A laminated iron core 1, an end ring 2 that compresses and holds the laminated iron core 1 from both sides in the axial direction, and a plurality of connecting members 3 that are disposed across the outer peripheral surface of the end ring 2. Are fixed by welding (for example, Japanese Patent Laid-Open No. 1-110031).
In this case, the laminated core 1 and the end ring 2 are provided with cooling air holes 12 and 21 penetrating in the axial direction, and the end ring 2 is provided with a screw hole 22 for fixing the bracket and a screw hole 23 for a suspension bolt. It is.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional technique has a problem that the number of machined parts such as end rings and coupling members is large and the cost is increased.
In addition, since the coupling member and the laminated core are fixed by welding, when the laminated core is formed of a thin steel plate such as a silicon steel plate whose surface is insulated, the thermal effect on the laminated core is large, and the electrical The characteristics may deteriorate. In addition, there is a problem that a lot of man-hours are involved because there is a need for temporary assembly before the welding operation and there are many welding locations.
In addition, since the end ring is provided with a screw hole for the suspension bolt, the end ring cannot be thinned. Therefore, the winding hits the end ring during the winding work, and the insertion work into the winding slot is performed. There was also a problem that it was difficult.
An object of the present invention is to provide a stator core of a rotating electric machine having a small number of parts and processing steps and having high rigidity.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a laminated iron core formed by laminating a plurality of thin iron plates, end rings provided on both axial end faces of the laminated iron core, and axial end faces of the end rings. In a stator iron core of a rotating electrical machine having a provided bracket mounting screw hole and a lifting bolt screw hole provided on the outer periphery of the laminated core, a predetermined interval is provided at a plurality of positions close to the outer circumference of the laminated iron core. A pair of through-holes penetrating in the axial direction, and a connecting bar formed by die-casting together with the end ring in the through-hole, and the bracket mounting screw holes are connected to each pair of the connecting holes. It is formed between the bars .
The lifting bolt screw holes are formed between the pair of connecting bars.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
1 is a side sectional view taken along the line XX 'of FIG. 2 showing an embodiment of the present invention, and FIG. 2 is a front view thereof.
In the figure, 1 is a laminated core formed by laminating a plurality of thin iron plates 10, 11 is a plurality of slot grooves provided for mounting armature windings on the inner periphery of the laminated core 1, and 12 is a laminated core. Cooling air holes 13 provided at four positions spaced apart by a predetermined angular pitch in the circumferential direction of 1, 13 are close to the outer periphery of the laminated core 1, with a predetermined space between adjacent cooling air holes 13. A pair of through-holes penetrating in the axial direction.
Reference numeral 2 denotes an end ring which is provided on both end surfaces of the laminated core 1 in the axial direction and compresses and holds the laminated core 1 and is formed by die casting such as an aluminum alloy. Reference numeral 30 denotes a connecting bar that is filled by die casting together with the end ring 2 in a pair of through holes 13 provided in the laminated core 1. A cooling air hole 21 is provided in the end ring 2 and communicates with the cooling air hole provided in the laminated core 1.
Reference numeral 22 denotes a screw hole provided in the end ring 2, which is disposed between a pair of connecting bars 30 as shown in FIG. Do not) is fixed.
Reference numeral 23 denotes a screw hole for a suspension bolt provided in the upper part of the outer periphery of the laminated core 1, and is arranged between a pair of connecting bars 30 as shown in FIGS. 3 (b) and 3 (c).
The slot groove 11, the cooling air hole 12, and the through hole 13 are processed at the same time when the thin iron plate 10 is formed by pressing and are laminated so as to penetrate the laminated core 1 in the axial direction.
The screw holes 22 and 23 are formed by machining after the end ring 2 and the connecting bar 30 are formed in the laminated core 1 by die casting.
[0006]
With such a configuration, since the connecting bar 30 is formed by die casting, the connecting bar 30 contracts while being cooled, and the laminated core 1 can be firmly compressed and held in the axial direction.
Further, since there are connecting bars 30 formed by die casting on both sides of the screw holes 22 and 23, the laminated iron core 1 around the screw holes 22 and 23 is reinforced and the screw holes are strengthened.
Therefore, since the screw hole 13 for the suspension bolt can be provided at any position of the laminated iron core 1 without providing the end ring 2, the end ring can be thinned and the winding is inserted into the winding slot. Work becomes easy.
[0007]
【The invention's effect】
As described above, according to the present invention, a connecting bar is formed by die casting on both sides of a screw hole for mounting a bracket and a screw hole for a suspension bolt, and the laminated iron core is compressed and held in the axial direction. Since the periphery of the hole is reinforced, there are no parts that require machining such as conventional coupling members, the thickness of the end ring can be reduced and the number of winding insertion operations can be reduced. There is an effect that it is possible to provide a stator core of a rotating electric machine having a small number of processing steps and high rigidity.
[Brief description of the drawings]
FIG. 1 is a side sectional view taken along the line XX ′ of FIG. 2 showing an embodiment of the present invention.
FIG. 2 is a front view showing an embodiment of the present invention.
3 shows an embodiment of the present invention, (a) a cross-sectional side view of the main part along the AA ′ cross section of FIG. 2, (b) a front cross-sectional view of the main part along the BB ′ cross section of FIG. c) It is side sectional drawing which follows the CC 'cross section of FIG.
FIG. 4 is a side sectional view showing a conventional example.
FIG. 5 is a front view showing a conventional example.
[Explanation of symbols]
1: Laminated iron core, 10: Thin iron plate, 11: Winding slot, 12, 21: Cooling air hole, 13: Through hole, 2: End ring, 22, 23: Screw hole, 30: Connecting bar

Claims (2)

複数枚の薄鉄板を積層して形成した積層鉄心と、前記積層鉄心の軸方向の両端面に設けたエンドリングと、前記エンドリングの軸方向端面に設けたブラケット取り付け用ネジ穴と、前記積層鉄心の外周に設けた吊り上げボルト用ネジ穴とを備えた回転電機の固定子鉄心において、
前記積層鉄心の外周に近い複数の位置に所定の間隔をおいて設けた1対の軸方向に貫通する貫通穴と、前記貫通穴の中に前記エンドリングと共にダイキャストによって形成した連結バーとを備え、前記ブラケット取り付け用ネジ穴を、前記各1対の連結バーの間に形成したことを特徴とする回転電機の固定子鉄心。
A laminated iron core formed by laminating a plurality of thin iron plates, end rings provided on both axial end faces of the laminated iron core, bracket mounting screw holes provided on the axial end faces of the end rings, and the laminated In the stator core of a rotating electric machine provided with screw holes for lifting bolts provided on the outer periphery of the iron core,
A pair of through-holes penetrating in the axial direction provided at a plurality of positions near the outer periphery of the laminated core, and a connecting bar formed by die-casting together with the end ring in the through-hole A stator iron core for a rotating electrical machine, wherein the bracket mounting screw holes are formed between the pair of connecting bars .
前記吊り上げボルト用ネジ穴は、前記各1対の連結バーの間に形成した請求項1記載の回転電機の固定子鉄心。The stator core for a rotating electric machine according to claim 1, wherein the lifting bolt screw holes are formed between the pair of connecting bars .
JP35314295A 1995-12-28 1995-12-28 Stator core of rotating electrical machine Expired - Fee Related JP3622307B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35314295A JP3622307B2 (en) 1995-12-28 1995-12-28 Stator core of rotating electrical machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35314295A JP3622307B2 (en) 1995-12-28 1995-12-28 Stator core of rotating electrical machine

Publications (2)

Publication Number Publication Date
JPH09191587A JPH09191587A (en) 1997-07-22
JP3622307B2 true JP3622307B2 (en) 2005-02-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100601456B1 (en) 2004-03-09 2006-07-14 엘지전자 주식회사 A motor for washing machine
JP4757887B2 (en) * 2008-02-27 2011-08-24 日本電産サーボ株式会社 Square hybrid stepping motor
JP5706630B2 (en) * 2010-03-31 2015-04-22 株式会社日立産機システム Laminated stator
JP2015012679A (en) * 2013-06-28 2015-01-19 株式会社日立製作所 Axial gap type rotary electric machine
CN114157062B (en) * 2021-12-02 2022-12-13 杭州新恒力电机制造有限公司 Alternating current motor stator structure and mounting method

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