JP2701048B2 - Rotor and its manufacturing method - Google Patents
Rotor and its manufacturing methodInfo
- Publication number
- JP2701048B2 JP2701048B2 JP63183124A JP18312488A JP2701048B2 JP 2701048 B2 JP2701048 B2 JP 2701048B2 JP 63183124 A JP63183124 A JP 63183124A JP 18312488 A JP18312488 A JP 18312488A JP 2701048 B2 JP2701048 B2 JP 2701048B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- shaft
- laminated
- shaft hole
- iron plate
- 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
【発明の詳細な説明】 ［産業上の利用分野］ この発明は電動機、発電機などの回転機の回転子、特
にその軸穴の状態を改良した回転子およびその製造方法
に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a rotating machine such as a motor or a generator, and more particularly to a rotor having an improved shaft hole condition and a method of manufacturing the same.
［従来の技術］ 電動機、発電機などの回転機は、一般に略円柱状の回
転子と、この回転子を取り囲む固定子とから構成されて
いる。第４図はこの回転子の構成の一例を概念的に説明
するための斜視図であり、２は円柱状の積層鉄芯、４は
この積層鉄芯の軸穴６に圧入されるシャフトである。[Related Art] A rotating machine such as an electric motor or a generator generally includes a substantially cylindrical rotor and a stator surrounding the rotor. FIG. 4 is a perspective view for conceptually explaining an example of the configuration of the rotor. Reference numeral 2 denotes a cylindrical laminated iron core, and reference numeral 4 denotes a shaft press-fit into a shaft hole 6 of the laminated iron core. .
軸穴６は積層鉄芯２の中心に同軸に貫通形成されてお
り、軸穴６に圧入されたシャフト４は積層鉄芯２と同軸
になる。積層鉄芯２は珪素鋼板などの電気鉄板を円盤状
に打ち抜いて形成した円鉄板2aを同軸に積層して一体化
したものからなる。The shaft hole 6 is formed coaxially through the center of the laminated iron core 2, and the shaft 4 pressed into the shaft hole 6 becomes coaxial with the laminated iron core 2. The laminated iron core 2 is formed by coaxially laminating and integrating circular iron plates 2a formed by punching an electric iron plate such as a silicon steel plate into a disk shape.
円鉄板2aは例えば珪素鋼板を打抜プレスなどで、まず
中心となる位置に軸穴６と同径の穴を打ち抜き、次にこ
の穴を中心として略円盤状の外形に打ち抜くなど、珪素
鋼板を打抜プレスで順次打ち抜いて形成する。軸穴６は
このようにして製造した円鉄板2aを積層したときにその
中心の穴が一本につながって形成される。The circular iron plate 2a is formed, for example, by punching a silicon steel plate by a punching press or the like, first punching a hole having the same diameter as the shaft hole 6 at a central position, and then punching a substantially disk-shaped outer shape around this hole. It is formed by punching out sequentially with a punching press. The shaft hole 6 is formed by laminating the circular iron plates 2a manufactured in this way and connecting the central holes thereof to one.
シャフト４の挿入は積層鉄芯２の軸穴６にシャフト４
を矢印Ａの方向に圧入することによって行なう（第４図
参照）。第５図は積層鉄芯２の軸穴６にシャフト４を圧
入して形成した回転子の内部の状態を示す断面図であ
り、シャフト４は積層鉄芯２に同軸に固着されている。The shaft 4 is inserted into the shaft hole 6 of the laminated iron core 2.
By press-fitting in the direction of arrow A (see FIG. 4). FIG. 5 is a sectional view showing an internal state of the rotor formed by press-fitting the shaft 4 into the shaft hole 6 of the laminated iron core 2, and the shaft 4 is coaxially fixed to the laminated iron core 2.
［発明が解決しようとする課題］ 上記のような従来の回転子およびその製造方法におい
ては、積層鉄芯の軸穴にシャフトを圧入する場合、軸穴
の圧入代の大きさの程度によってはかじりが発生した
り、積層鉄芯が変形したりすることがあるので、プレス
打抜きをした後、軸穴をリーマまたはブローチ等で削っ
て、その圧入代を適当な大きさに後加工しなければなら
ないという問題点があった。[Problems to be Solved by the Invention] In the conventional rotor and the method for manufacturing the same as described above, when the shaft is press-fitted into the shaft hole of the laminated iron core, the shaft is galled depending on the size of the press-fitting allowance of the shaft hole. May occur or the laminated iron core may be deformed, so after press punching, the shaft hole must be shaved with a reamer or broach, and the press-fit allowance must be post-processed to an appropriate size. There was a problem.
また、軸穴を基準にして円鉄板を積層すると、回転子
の外周が凹凸になり、固定子と回転子との隙を維持する
ために外周の切削を後加工で行なわければならないとい
う問題点があった。In addition, when laminating circular iron plates based on the shaft hole, the outer periphery of the rotor becomes uneven, and the outer periphery must be cut by post-processing in order to maintain the gap between the stator and the rotor. was there.
更に、軸穴６の断面形状が、第６図又は第７図に示す
ように、スプライン状の場合は、圧入代のための後加工
を要しないが、しかし、その内径φＡの公差が極めて厳
しく、このような形状に加工すること自体が極めて面倒
であり、しかもシャフトもこれに対応した形状に加工し
なければならないという問題点もあった。Further, when the cross-sectional shape of the shaft hole 6 is a spline shape as shown in FIG. 6 or 7, no post-processing for press-fitting is required, but the tolerance of the inner diameter φA is extremely strict. However, processing into such a shape itself is extremely troublesome, and there is a problem that the shaft must also be processed into a shape corresponding to this.
この発明は、これらの問題点を解決するためになされ
たもので、軸穴へのシャフトの圧入および固定を良好な
らしめた回転子とその製造方法を得ることを目的とする
ものである。The present invention has been made in order to solve these problems, and an object of the present invention is to provide a rotor in which a shaft is press-fitted and fixed in a shaft hole and a method of manufacturing the same.
［課題を解決するための手段］ この発明に係る回転子は、中心の軸穴を有する積層鉄
芯と、該軸穴に嵌合されているシャフトとを備え、該積
層鉄芯は穴を有する複数の円鉄板を外径を基準にして円
柱状に積層一体化させてなり、該穴の中心に該円鉄板の
外径を基準にした中心から半径方向に所定距離δだけ偏
位しており、該穴の中心と該円鉄板の外径を基準にした
中心とを結ぶ線は隣り合う円鉄板間で所定角度ずつ回転
方向にずれており、該穴は該円鉄板の積層によって軸穴
を形成しており、該軸穴の内面には該円鉄板の穴の内周
縁による段差が形成されており、該段差の突出部によっ
て形成される穴の内径は該シャフトの外径と等しいか又
は大きくしたことによって上記問題点を解決したもので
ある。[Means for Solving the Problems] A rotor according to the present invention includes a laminated iron core having a central shaft hole, and a shaft fitted in the shaft hole, and the laminated iron core has a hole. A plurality of circular iron plates are laminated and integrated in a columnar shape based on the outer diameter, and the center of the hole is offset from the center based on the outer diameter of the circular plate by a predetermined distance δ in the radial direction. The line connecting the center of the hole and the center based on the outer diameter of the circular iron plate is shifted by a predetermined angle between adjacent circular iron plates in the rotation direction, and the hole is formed by laminating the circular iron plates. The inner surface of the shaft hole has a step formed by the inner peripheral edge of the hole of the iron plate, and the inner diameter of the hole formed by the protrusion of the step is equal to the outer diameter of the shaft or The above problem has been solved by increasing the size.
ここで、前記所定角度は360゜/M（Ｍ＝２〜８）とす
るのが好ましい。Here, it is preferable that the predetermined angle is 360 ° / M (M = 2 to 8).
また、この発明に係る回転子の製造方法は、積層され
て軸穴を形成する穴を鉄板に形成し、該穴を形成した該
鉄板をダイを用いて円板状に打ち抜くと同時に、円板状
に打ち抜かれて形成された円鉄板を該ダイ内に押し込ん
で円柱状に積層一体化させて積層鉄心を形成し、該積層
鉄心の軸穴にシャフトを嵌合させる方法であって、該鉄
板を打ち抜く際に該穴の中心が該ダイの中心軸から所定
距離δだけ偏位するようにし、該鉄板を打ち抜いて円鉄
板を積層させる毎に該ダイをその中心軸を中心にして所
定角度ずつ回転させることによって上記問題点を解決し
たものである。Further, the method for manufacturing a rotor according to the present invention is characterized in that a hole that is laminated to form a shaft hole is formed in an iron plate, and the iron plate formed with the hole is punched into a disk shape by using a die. A method in which a circular iron plate formed by punching in a shape is pressed into the die to be laminated and integrated in a columnar shape to form a laminated core, and a shaft is fitted into a shaft hole of the laminated core. When punching, the center of the hole is deviated by a predetermined distance δ from the center axis of the die, and every time the iron plate is punched and a circular iron plate is laminated, the die is shifted by a predetermined angle about the center axis thereof. The above problem is solved by rotating.
［作 用］ この発明においては、円鉄板の穴の中心を所定角度ご
とに軸穴の中心から半径方向に所定距離δだけ偏位させ
たので、積層鉄芯の軸穴の内面に規則的な段差が形成さ
れ、軸穴にシャフトを挿入したときにシャフトと接触す
る軸穴の面積が減少し、積層鉄芯の軸穴にシャフトを挿
入する場合の摩擦抵抗が減少する。[Operation] In the present invention, since the center of the hole of the circular iron plate is displaced by a predetermined distance δ in the radial direction from the center of the shaft hole at every predetermined angle, the inner surface of the shaft hole of the laminated iron core is regularly arranged. A step is formed, the area of the shaft hole that comes into contact with the shaft when the shaft is inserted into the shaft hole is reduced, and the frictional resistance when the shaft is inserted into the shaft hole of the laminated iron core is reduced.
また、円鉄板の穴の中心を所定角度ごとに該軸穴の中
心から半径方向に所定距離δだけ偏位させたので、各円
鉄板の重心が軸穴の中心軸の周囲に均一に分散し、積層
鉄芯の重心が軸穴の中心と一致する。Also, since the center of the hole of the circular iron plate is deviated by a predetermined distance δ in the radial direction from the center of the shaft hole at a predetermined angle, the center of gravity of each circular plate is uniformly distributed around the center axis of the shaft hole. , The center of gravity of the laminated iron core coincides with the center of the shaft hole.
［実施例］ 第１図はこの発明に係る回転子の積層鉄心の一例を示
す斜視図であり、回転子積層鉄芯２は中央に穴の開いた
円鉄板2aを軸穴６の中心軸８（第２図参照）を中心にし
て90゜ずつ回転させてずらしながら順次積層することに
よって構成されている。FIG. 1 is a perspective view showing an example of a laminated iron core of a rotor according to the present invention. A laminated iron core 2 of a rotor is formed by a circular iron plate 2a having a hole in the center and a central axis 8 of a shaft hole 6. (See FIG. 2). The layers are sequentially rotated while being shifted by 90.degree.
第２図は回転子積層鉄芯２を上から見た状態を示す平
面図であり、点10aは一番上の円鉄板2aの中心、点10bは
上から二番目の円鉄板2aの中心、点10cは上から三番目
の円鉄板2aの中心、点10dは上から四番目の円鉄板2aの
中心である。FIG. 2 is a plan view showing the rotor laminated iron core 2 viewed from above, where a point 10a is the center of the top circular iron plate 2a, a point 10b is a center of the second circular iron plate 2a from the top, Point 10c is the center of the third circular iron plate 2a from the top, and point 10d is the center of the fourth circular iron plate 2a from the top.
円鉄板2aはこのように順次回転させながら積層されて
おり、軸穴６の中心軸８に対する円鉄板2aの中心の偏位
量は第２図にδで示すようになる。The circular iron plates 2a are thus laminated while being sequentially rotated, and the amount of deviation of the center of the circular iron plate 2a with respect to the central axis 8 of the shaft hole 6 is indicated by δ in FIG.
積層鉄芯２の軸穴６の直径D1は、円鉄板2aを積層した
時に上から下へ通しで形成される直径D2の円筒状空間12
に直径D3のシャフト４がうまく嵌合するような大きさに
なるように、若干大き目に形成してある 上記のような回転子積層鉄芯２は例えば次のようにし
て製造することができる。The diameter D 1 of the shaft hole 6 of the laminated iron core 2 is a cylindrical space 12 having a diameter D 2 formed by passing the circular iron plates 2a from top to bottom when they are laminated.
As the shaft 4 of the diameter D 3 is sized to better fit the slightly larger-formed laminated rotor iron core 2 as described above are can be prepared, for example, as follows .
まず、プレス打抜き時に於て、軸穴６となる穴を後段
の外径抜工程で中心軸８となるべき位置よりδだけ所定
方向にずりして打ち抜き、次に、外径抜き工程におい
て、前もって打ち抜きする前にそれまで打ち抜かれてダ
イ内へ積層された積層鉄芯をダイと共に360゜/Mは２〜
８の整数）回転させたのち、外径を打ち抜き、形成され
た円鉄板2aを回転させたダイ内の積層鉄芯の上へ順次積
層する。これによって、軸穴６の内面に規則的な段差が
形成される（第１図参照）。First, at the time of press punching, the hole to be the shaft hole 6 is punched by shifting in a predetermined direction by δ from the position to be the central axis 8 in the subsequent outer diameter punching step, and then, in the outer diameter punching step, Before punching, the laminated iron core that has been punched out and laminated into the die is 360 ゜ / M
After being rotated (an integer of 8), the outer diameter is punched out, and the formed circular iron plate 2a is sequentially laminated on the laminated iron core in the rotated die. Thereby, a regular step is formed on the inner surface of the shaft hole 6 (see FIG. 1).
次に、シャフト４と軸穴６との間の隙間に接着剤14を
注入して所定時間放置すると、接着剤14は固化し、シャ
フト４は第３図に示すように軸穴６に固定される。この
ように、シャフト４と軸穴６との間の隙間に接着剤14を
流し込むことによってシャフト４を積層鉄芯22の軸穴６
に容易に固定することができる。Next, when the adhesive 14 is injected into the gap between the shaft 4 and the shaft hole 6 and left for a predetermined time, the adhesive 14 is solidified and the shaft 4 is fixed to the shaft hole 6 as shown in FIG. You. As described above, the adhesive 4 is poured into the gap between the shaft 4 and the shaft hole 6 so that the shaft 4 is connected to the shaft hole 6 of the laminated iron core 22.
Can be fixed easily.
なお、円鉄板2aの穴の偏位量δは、接着剤14が最も効
果的に働く量にする必要があるが、これは金型製作時に
調節する。The amount of deviation δ of the hole in the circular iron plate 2a needs to be an amount in which the adhesive 14 works most effectively, but this is adjusted when the mold is manufactured.
更に、上記説明の中では、円鉄板2aの回転を360゜/M
（Ｍは２〜８の整数）として説明したが、円鉄板2aの回
転はこれに限られず、電気特性の向上を図るために行う
通常のスキュー角度（例えば３゜とかあるいはそれ以外
の微少角度）分ずつ回転させて積層鉄芯を製造すること
も同様に実施できるものである。Further, in the above description, the rotation of the circular iron plate 2a is 360 ° / M
(M is an integer of 2 to 8), but the rotation of the iron plate 2a is not limited to this, and a normal skew angle (for example, 3 ° or other small angle) performed to improve electric characteristics It is also possible to manufacture a laminated iron core by rotating it by minutes.
［発明の効果］ この発明は以上説明したように構成したので、積層鉄
芯の軸穴の内面に規則的な段差が形成され、軸穴にシャ
フトを挿入したときにシャフトと接触する軸穴の面積が
減少し、積層鉄芯の軸穴にシャフトを挿入する場合の摩
擦抵抗が減少し、回転子用鉄芯にシャフトを圧入する工
程に於て圧入代を極力少なくすることができ、鉄芯の品
質を上げ、不良率を減少させると共に、軸穴の修正（後
加工）を不要にするという効果がある。[Effect of the Invention] Since the present invention is configured as described above, a regular step is formed on the inner surface of the shaft hole of the laminated iron core, and when the shaft is inserted into the shaft hole, the shaft hole contacts the shaft. The area is reduced, the frictional resistance when the shaft is inserted into the shaft hole of the laminated iron core is reduced, and the press-in allowance can be reduced as much as possible in the process of pressing the shaft into the iron core for the rotor. This has the effect of increasing the quality of the steel, reducing the defect rate, and eliminating the need for correcting (post-processing) the shaft hole.
また、円鉄板の穴の中心を所定角度ごとに該軸穴の中
心から半径方向に所定距離δだけ偏位させて積層したの
で、すなわち円鉄板を回転積みしたので、各円鉄板の重
心が軸穴の中心軸の周囲に均一に分散し、積層鉄芯の重
心が軸穴の中心と一致し、積層鉄芯のバランスが良くな
り、回転子製造のコスト減に寄与するという効果があ
る。In addition, since the centers of the holes of the circular iron plates are laminated by being shifted by a predetermined distance δ in the radial direction from the center of the shaft hole at predetermined angles, that is, the circular iron plates are rotated and stacked, so that the center of gravity of each circular iron plate is It is uniformly distributed around the center axis of the hole, and the center of gravity of the laminated iron core coincides with the center of the shaft hole, thereby improving the balance of the laminated iron core and contributing to a reduction in rotor manufacturing cost.
更に、この発明は円鉄板を外径を基準にして積層する
ようにしたので、固定子との間に隙間を形成させるため
に、後加工で外周切削をしなくてもよいという効果があ
る。Further, in the present invention, since the circular iron plates are laminated on the basis of the outer diameter, there is an effect that the outer periphery need not be cut by post-processing in order to form a gap with the stator.
第１図はこの発明に係る回転子の積層鉄心の斜視図、第
２図は第１図のものの平面図、第３図は第１図のものに
シャフトを挿入して形成した回転子の断面図、第４図は
従来の回転子の分解斜視図、第５図は従来の回転子の断
面図、第６図および第７図は従来の積層鉄芯の軸穴の形
状の一例を示す説明図である。 ２……積層鉄芯、2a……円鉄板、４……シャフト、６…
…軸穴、８……中心軸、10a,10b,10c,10d……中心、12
……円筒状空間、14……接着剤、D1,D2,D3……直径、δ
……偏位量。1 is a perspective view of a laminated core of a rotor according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a cross section of the rotor formed by inserting a shaft into that of FIG. Fig. 4 is an exploded perspective view of a conventional rotor, Fig. 5 is a cross-sectional view of the conventional rotor, and Figs. 6 and 7 show examples of the shape of the shaft hole of the conventional laminated iron core. FIG. 2 ... Laminated iron core, 2a ... Circular iron plate, 4 ... Shaft, 6 ...
… Shaft hole, 8… Center axis, 10a, 10b, 10c, 10d… Center, 12
…… Cylindrical space, 14… Adhesive, D 1 , D 2 , D 3 …… Diameter, δ
...... The amount of deviation.
Claims (4)
嵌合されているシャフトとを備え、該積層鉄芯は穴を有
する複数の円鉄板を外径を基準にして円柱状に積層一体
化させてなり、該穴の中心に該円鉄板の外径を基準にし
た中心から半径方向に所定距離δだけ偏位しており、該
穴の中心と該円鉄板の外径を基準にした中心とを結ぶ線
は隣り合う円鉄板間で所定角度ずつ回転方向にずれてお
り、該穴は該円鉄板の積層によって軸穴を形成してお
り、該軸穴の内面には該円鉄板の穴の内周縁による段差
が形成されており、該段差の突出部によって形成される
穴の内径は該シャフトの外径と等しいか又は大きいこと
を特徴とする回転子。1. A laminated iron core having a shaft hole at the center thereof, and a shaft fitted into the shaft hole, wherein the laminated iron core is formed by forming a plurality of circular iron plates having holes into circles based on an outer diameter. The center of the hole is deviated by a predetermined distance δ in the radial direction from the center based on the outer diameter of the iron plate, and the center of the hole and the outer diameter of the iron plate The line connecting the center with respect to is shifted in the rotational direction by a predetermined angle between the adjacent circular iron plates, the hole forms a shaft hole by laminating the circular iron plates, and the inner surface of the shaft hole has A rotor having a step formed by an inner peripheral edge of a hole of the circular iron plate, and an inner diameter of a hole formed by a protrusion of the step is equal to or larger than an outer diameter of the shaft.
あることを特徴とする請求項１記載の回転子。2. The rotor according to claim 1, wherein the predetermined angle is 360 ° / M (M = 2 to 8).
であることを特徴とする請求項１記載の回転子。3. The rotor according to claim 1, wherein the predetermined angle is an angle corresponding to a skew amount.
し、該穴を形成した該鉄板をダイを用いて円板状に打ち
抜くと同時に、円板状に打ち抜かれて形成された円鉄板
を該ダイ内に押し込んで円柱状に積層一体化させて積層
鉄心を形成し、該積層鉄心の軸穴にシャフトを嵌合させ
る方法であって、該鉄板を打ち抜く際に該穴の中心が該
ダイの中心軸から所定距離δだけ偏位するようにし、該
鉄板を打ち抜いて円鉄板を積層させる毎に該ダイをその
中心軸を中心にして所定角度ずつ回転させたことを特徴
とする回転子の製造方法。4. A hole formed in an iron plate, which is laminated to form a shaft hole, and the iron plate having the hole formed therein is punched into a disk shape by using a die, and is also formed by punching into a disk shape. A method in which a circular iron plate is pushed into the die to be laminated and integrated in a columnar shape to form a laminated core, and a shaft is fitted into a shaft hole of the laminated core. Is deviated by a predetermined distance δ from the central axis of the die, and the die is rotated by a predetermined angle about the central axis each time the iron plate is punched and a circular iron plate is laminated. Rotor manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63183124A JP2701048B2 (en) | 1988-07-22 | 1988-07-22 | Rotor and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63183124A JP2701048B2 (en) | 1988-07-22 | 1988-07-22 | Rotor and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0236748A JPH0236748A (en) | 1990-02-06 |
| JP2701048B2 true JP2701048B2 (en) | 1998-01-21 |
Family
ID=16130214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63183124A Expired - Lifetime JP2701048B2 (en) | 1988-07-22 | 1988-07-22 | Rotor and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2701048B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009003228B4 (en) * | 2008-06-20 | 2020-11-05 | Robert Bosch Gmbh | Electric machine |
| EP2325980B2 (en) | 2009-11-23 | 2018-11-07 | ABB Schweiz AG | Rotor disk and assembly method |
| JP2013099222A (en) * | 2011-11-07 | 2013-05-20 | Toyota Motor Corp | Rotor and rotary electric machine |
| JP5843692B2 (en) * | 2012-05-15 | 2016-01-13 | 三菱電機株式会社 | Method for manufacturing laminated iron core of rotor of rotating electric machine |
| JP6194744B2 (en) * | 2013-10-23 | 2017-09-13 | 日産自動車株式会社 | Rotor core |
| DE102019111332A1 (en) * | 2019-05-02 | 2020-11-05 | Festool Gmbh | System comprising drive motors for hand machine tools |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57208842A (en) * | 1981-06-19 | 1982-12-22 | Toshiba Corp | Stacking method of iron core |
-
1988
- 1988-07-22 JP JP63183124A patent/JP2701048B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0236748A (en) | 1990-02-06 |
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