JPH0514505B2 - - Google Patents
Info
- Publication number
- JPH0514505B2 JPH0514505B2 JP61042823A JP4282386A JPH0514505B2 JP H0514505 B2 JPH0514505 B2 JP H0514505B2 JP 61042823 A JP61042823 A JP 61042823A JP 4282386 A JP4282386 A JP 4282386A JP H0514505 B2 JPH0514505 B2 JP H0514505B2
- Authority
- JP
- Japan
- Prior art keywords
- bush
- shaft
- rotor
- bushing
- coating
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は小型モータのロータ、特にロータ即ち
回転子を構成する鉄心等を保持するシヤフトに固
い金属製のブツシユを前記シヤフトを傷つけるこ
となく前記シヤフトに装着し、ずれ耐圧を高める
と共に、電気的な絶縁ができるよう構成した小型
モータのロータに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a method for attaching a hard metal bush to a shaft for holding a rotor of a small motor, particularly an iron core, etc. constituting the rotor, without damaging the shaft. The present invention relates to a rotor for a small motor that is mounted on a shaft and configured to increase shear resistance and provide electrical insulation.
従来、小型モータのロータを保持するシヤフト
には、モータの回転中におけるロータの軸方向の
移動を所定範囲内に制限するためにブツシユを圧
入している。而してこのブツシユは軸方向の位置
ずれを生じないようにすることが必要であり、高
いずれ耐圧が要求される。
Conventionally, a bushing is press-fitted into a shaft that holds a rotor of a small motor in order to limit the axial movement of the rotor within a predetermined range during rotation of the motor. Therefore, it is necessary to prevent this bush from shifting in the axial direction, and it is required to withstand high pressure.
上記のブツシユの材質として樹脂を用い、該樹
脂をプレス加工その他の成形手段によつて得た成
型品を用いた場合には、前記ブツシユによる位置
決め精度が得難い問題点があつた。また、非鉄
系、例えば、真鍮等からなる板材からプレス打ち
抜いたブツシユ、あるいは切削したブツシユを用
いた場合には、上記ずれ耐圧の高いものを用いて
もシヤフトに傷をつけることはないが、高価なも
のとなつてしまうという問題点があつた。更に、
安価な鉄板からプレスで打ち抜いたブツシユを用
いた場合には、前記ブツシユが非鉄系のブツシユ
に比して硬度が高いため、シヤフトに圧入する際
に、シヤフトに傷をつけたり、あるいはシヤフト
を曲げてしまうという問題点があつた。このた
め、前記シヤフトに傷を発生させず且つシヤフト
を曲げない程度であつて更に上記位置ずれを生じ
させないためには、前記シヤフトの外径に対して
鉄系のブツシユの内径の公差を厳しく管理する必
要が有り、特にプレスで打ち抜いたブツシユの公
差管理が極めて困難なものとなつてしまうという
問題点があつた。
When a resin is used as the material of the bush and a molded product obtained by press working or other molding means is used, there is a problem that positioning accuracy by the bush is difficult to obtain. In addition, if a bushing is press-punched or machined from a plate made of non-ferrous material, such as brass, the shaft will not be damaged even if the material with high shear resistance is used, but it is expensive. The problem was that it became a thing. Furthermore,
When using a bushing punched from an inexpensive steel plate, the bushing is harder than a non-ferrous bushing, so when press-fitting it into the shaft, there is a risk of damaging or bending the shaft. There was a problem with putting it away. Therefore, in order to prevent the shaft from being damaged or bent, and to prevent the above-mentioned positional deviation from occurring, the tolerance of the inner diameter of the iron bushing with respect to the outer diameter of the shaft must be strictly controlled. There was a problem in that it became extremely difficult to control the tolerances of the bushes punched out with a press.
本発明の目的は、前記問題点を解消することで
あり、回転子即ちロータを構成する鉄心等を保持
するシヤフトにブツシユを弱い力で挿入したにも
拘らず、高いずれ耐圧を得ると共に前記ブツシユ
を電気的に絶縁することができる小型モータのロ
ータを提供することである。 An object of the present invention is to solve the above-mentioned problems, and even though the bushing is inserted with a weak force into the shaft that holds the iron core etc. that constitutes the rotor, it is possible to obtain a high withstand pressure and to maintain the bushing. An object of the present invention is to provide a rotor for a small motor that can be electrically insulated.
上記の問題点を解決するために、本発明は、ロ
ータを構成する鉄心を保持するシヤフトに軸方向
の移動を制限するためのブツシユを固定した小型
モータのロータにおいて、前記シヤフトに弱い力
で挿入し得るよう構成した金属製のブツシユと、
弱い力で前記シヤフトの仮位置に挿入したブツシ
ユおよび前記鉄心に塗布され当該ブツシユが所定
位置に設定された状態で硬化される絶縁性のコー
テイング被膜を備え、当該コーテイング被膜を硬
化させることによつて上記ブツシユの位置ずれに
対する耐圧を向上させかつ絶縁する、という技術
的手段を採用したのである。
In order to solve the above problems, the present invention provides a rotor for a small motor in which a bush for restricting axial movement is fixed to a shaft that holds an iron core constituting the rotor, and the rotor is inserted into the shaft with a weak force. A metal bush configured to allow
An insulating coating film is applied to the bush inserted into a temporary position of the shaft with a weak force and the iron core, and is cured with the bush set in a predetermined position, and by curing the coating film. A technical measure was adopted to improve the withstand voltage against displacement of the bush and provide insulation.
以下、図面を参照して本発明による小型モータ
のロータの実施例を詳細に説明する。
Hereinafter, embodiments of a rotor for a small motor according to the present invention will be described in detail with reference to the drawings.
第１図は本発明による小型モータのロータの一
実施例の構成図とその構成態様とを示し、第２図
は本発明に用いるブツシユを説明する図である。 FIG. 1 shows a configuration diagram of an embodiment of a rotor of a small motor according to the present invention and its configuration, and FIG. 2 is a diagram illustrating a bush used in the present invention.
図中、１はブツシユ、２は回転子鉄心、３はシ
ヤフト、４は被膜、５はコミユテータ、６は圧入
棒及び７は受け治具を表す。 In the figure, 1 is a bush, 2 is a rotor core, 3 is a shaft, 4 is a coating, 5 is a commutator, 6 is a press-fitting rod, and 7 is a receiving jig.
第１図Ａ，Ｂ及びＣは本発明に係わる小型モー
タのロータの製造過程に対応したものであつて、
第１図Ａはブツシユ１を仮位置に挿入した状態を
示し、第１図Ｂは接着剤をコーテイングした状態
を示し、第１図Ｃはコミユテータ５を基準として
ブツシユ１を所定位置に設定した状態を示す。以
下これら図面について順次説明する。 FIGS. 1A, B, and C correspond to the manufacturing process of a rotor for a small motor according to the present invention, and
Fig. 1A shows the bush 1 inserted into a temporary position, Fig. 1B shows the state coated with adhesive, and Fig. 1C shows the bush 1 set at a predetermined position with reference to the commutator 5. shows. These drawings will be explained in sequence below.
第１図Ａにおいて、ブツシユ１は鉄を用いて製
造したもの、例えば、プレスで打ち抜き加工した
ものであつて、弱い圧入力、例えば、約10Kg程度
の力でシヤフト３の図示の仮位置に挿入したもの
であり、後述する接着剤のコーテイングによつて
充分なずれ耐圧が得られるものである。ブツシユ
１は、高周波誘導加熱によつて加熱され得る材
質、例えば鉄、銅あるいは鉄の合金（ステンレス
鋼を含む）や銅合金で構成される。しかし鉄ある
いは鉄合金がコストや加工性の面から好ましい。
このように、弱い力でシヤフト３の仮位置に挿入
し得るブツシユ１であるため、ブツシユ１の内径
の公差をいわばラフに製造してもよく、ブツシユ
１の内径の公差はそれほど厳密に管理しなくても
よい。しかも、ブツシユ１を強い力でシヤフト３
に圧入するのみによつて充分に高いずれ耐圧を得
るという必要がないため、上記した如くシヤフト
３に傷を付けたり、あるいはシヤフト３を曲げた
りするようなことが生じない。また、ブツシユ１
の強度が強いため、薄いブツシユ１であつても、
後述する如く接着剤が硬化した状態では充分にず
れ耐圧を得ることができる。なお、図中、シヤフ
ト３には磁気回路を構成する回転子鉄心２が固定
されている。 In FIG. 1A, the bush 1 is made of iron, for example, stamped with a press, and is inserted into the temporary position shown in the shaft 3 with a weak pressing force, for example, about 10 kg. This means that sufficient shear resistance can be obtained by coating with an adhesive, which will be described later. The bush 1 is made of a material that can be heated by high-frequency induction heating, such as iron, copper, an iron alloy (including stainless steel), or a copper alloy. However, iron or an iron alloy is preferable from the viewpoint of cost and workability.
In this way, since the bush 1 can be inserted into the temporary position of the shaft 3 with a weak force, the tolerance of the inner diameter of the bush 1 may be manufactured with a rough so to speak, and the tolerance of the inner diameter of the bush 1 may not be so strictly controlled. You don't have to. Moreover, pushbutton 1 is moved by strong force to shaft 3.
Since it is not necessary to obtain a sufficiently high pressure resistance only by press-fitting the shaft 3, the shaft 3 will not be damaged or bent as described above. Also, Butsuyu 1
Because of its strong strength, even if it is a thin bushing 1,
As will be described later, when the adhesive is cured, sufficient shear resistance can be obtained. In addition, in the figure, a rotor core 2 constituting a magnetic circuit is fixed to the shaft 3.
第１図Ｂにおいて、被膜４は接着剤、例えば、
エポキシ樹脂等を薄く塗布（例えば、約0.15mm以
上塗布）した直後の未硬化状態にあるものであつ
て、図中斜線を用いて記述した部分即ち回転子鉄
心２の側面、コイルを巻線する部分、回転子鉄心
２とブツシユ１との間のシヤフト３及び回転子鉄
心２に面しているブツシユ１の部分にエポキシ樹
脂を薄く塗布即いコーテイングしたものである。
高周波誘導加熱により、回転子鉄心２とシヤフト
３とブツシユ１とについて、被膜４が塗布される
べき個所を加熱し、その上で当該個所に被膜４を
塗布する。この被膜４が、後述する如く、硬化さ
れる以前にブツシユ１を所定位置に位置決めす
る。そして被膜４が硬化することによつてブツシ
ユ１をシヤフト３に強固に固着させると共に前記
被膜４自身が絶縁膜となつて電気的な絶縁を行う
ものである。 In FIG. 1B, the coating 4 is an adhesive, e.g.
It is in an uncured state immediately after applying a thin layer of epoxy resin, etc. (for example, approximately 0.15 mm or more), and the area indicated by diagonal lines in the figure, i.e., the side surface of the rotor core 2, is where the coils are wound. The shaft 3 between the rotor core 2 and the bush 1 and the part of the bush 1 facing the rotor core 2 are thinly coated with epoxy resin.
The portions of the rotor core 2, shaft 3, and bush 1 to which the coating 4 is to be applied are heated by high-frequency induction heating, and then the coating 4 is applied to the portions. This coating 4 positions the bush 1 in a predetermined position before being cured, as will be described later. When the coating 4 is cured, the bush 1 is firmly fixed to the shaft 3, and the coating 4 itself becomes an insulating film to provide electrical insulation.
第１図Ｃにおいて、第１図Ｂを用いて説明した
被膜４を塗布した後、前記被膜４が硬化する前に
速やかに行うべき作業を示す。まず、コミユテー
タ５がシヤフト３の所定位置に固定される。次い
で、シヤフト３の右端から受け治具７を図示の如
く挿入し、且つシヤフト３の左端から圧入棒６を
図示の如く挿入して前記圧入棒６を図中矢印で示
す右方向にプレスする。該プレスは、図中コミユ
テータ５の左端の図示基準位置からブツシユ１の
右端までの距離が図示所定距離L0になるように
行う。以上の如き作業によつて、上記した仮位置
に挿入したブツシユ１が、図示基準位置を基準と
して所定距離L0だけ離れた位置に移動され設定
されることとなる。そして、被膜４を硬化させる
ことにより、前記ブツシユ１は極めて強固にシヤ
フト３に対して固着され、高いずれ耐圧を有する
ものとなる。 FIG. 1C shows operations to be performed immediately after coating the coating 4 described using FIG. 1B and before the coating 4 hardens. First, the commutator 5 is fixed at a predetermined position on the shaft 3. Next, the receiving jig 7 is inserted from the right end of the shaft 3 as shown, and the press-fit rod 6 is inserted from the left end of the shaft 3 as shown, and the press-fit rod 6 is pressed in the right direction as indicated by the arrow in the figure. This pressing is performed so that the distance from the reference position shown at the left end of the commutator 5 in the drawing to the right end of the bush 1 becomes a predetermined distance L 0 shown in the drawing. Through the operations described above, the bush 1 inserted into the above-mentioned temporary position is moved and set at a position a predetermined distance L0 away from the illustrated reference position. Then, by curing the coating 4, the bush 1 is extremely firmly fixed to the shaft 3 and has a high withstand pressure.
ブツシユ１は例えば厚み１mm程度の薄鉄板をプ
レス加工し、第２図Ａ図示の如く、鍔をもつた形
状に加工される。このとき、ブツシユ１の中空部
分の穴の形状は、第２図Ｂに示す如く、真の円で
はなく、例えば頂点部分に丸みをもつた３角形形
状にされる。勿論、上記穴の形状は、楕円あるい
は多角形形状でもよく、このような穴の形状にす
るのは、ブツシユの穴の寸法精度を比較的ラフに
製作しておき、弱い力で仮位置にまで挿入できる
ようにし、その仮位置で弾性的にシヤフトを保持
するようにするためである。 The bush 1 is formed by pressing a thin iron plate with a thickness of about 1 mm, for example, into a shape with a flange as shown in FIG. 2A. At this time, the shape of the hole in the hollow part of the bush 1 is not a true circle but, for example, a triangular shape with rounded apexes, as shown in FIG. 2B. Of course, the shape of the hole described above may be an ellipse or a polygon, and in order to create such a shape, the dimensional accuracy of the hole in the bushing is made relatively rough, and it is possible to hold it in a temporary position with a weak force. This is to enable the shaft to be inserted and to elastically hold the shaft in that temporary position.
第２図Ｃは上記第２図Ａに示す鍔をもつブツシ
ユの変形を示し、ハトメ形状に構成されたものを
表わしている。 FIG. 2C shows a modification of the bush having the flange shown in FIG. 2A, and shows a button having an eyelet shape.
以上説明した如く、本発明によれば、ロータ即
ち回転子を構成する鉄心等を保持するシヤフトに
ブツシユを弱い力で挿入した後、前記ブツシユを
接着剤でコーテイングして強固に固定し且つ絶縁
しているため、前記ブツシユを弱い圧入力で前記
シヤフトに挿入したにもかかわらず高いずれ耐圧
を得ることができると共に、前記ブツシユを電気
的に絶縁することができる。このため、鉄系の金
属製ブツシユの内径公差の管理をラフにしてもよ
く、しかも、前記金属製ブツシユを前記シヤフト
に挿入する際に傷を生じさせることがない。更
に、金属製ブツシユのエツジ部分まで電気的に絶
縁されるため、絶縁した金属製の前記ブツシユに
接触する部分まで回転子巻線を巻くことが可能と
なる。
As explained above, according to the present invention, after the bushing is inserted with a weak force into the shaft that holds the iron core and the like constituting the rotor, the bushing is coated with adhesive to be firmly fixed and insulated. Therefore, even though the bush is inserted into the shaft with a weak pressing force, a high breakdown voltage can be obtained, and the bush can be electrically insulated. Therefore, the inner diameter tolerance of the iron-based metal bushing can be roughly controlled, and moreover, the metal bushing will not be damaged when inserted into the shaft. Furthermore, since the edge portion of the metal bushing is electrically insulated, it is possible to wind the rotor winding up to the portion that contacts the insulated metal bushing.
第１図は本発明による小型モータのロータの一
実施例の構成態様を示す概略図であり、第１図Ａ
はブツシユをシヤフトにその仮位置に挿入した状
態を示し、第１図Ｂは第１図Ａに示されるものに
接着剤をコーテイングした状態を示し、及び第１
図Ｃはコミユテータを基準にしてブツシユを所定
位置に設定した状態を示し、並びに第２図Ａ、第
２図Ｂ及び第２図Ｃは、第１図に示されるブツシ
ユを説明する図である。
１：ブツシユ、３：シヤフト、４：被膜。
FIG. 1 is a schematic diagram showing a configuration of an embodiment of a rotor of a small motor according to the present invention, and FIG.
1B shows the bush inserted into the shaft in its temporary position; FIG. 1B shows the adhesive shown in FIG. 1A coated with adhesive;
FIG. C shows the bush set in a predetermined position with respect to the commutator, and FIGS. 2A, 2B, and 2C are diagrams for explaining the bush shown in FIG. 1. 1: Bush, 3: Shaft, 4: Film.
Claims (1)
軸方向の移動を制限するためのブツシユを固定し
た小型モータのロータにおいて、前記シヤフトに
弱い力で挿入し得るよう構成した金属製のブツシ
ユと、弱い力で前記シヤフトの仮位置に挿入した
ブツシユおよび前記鉄心に塗布され当該ブツシユ
が所定位置に設定された状態で硬化される絶縁性
のコーテイング被膜を備え、当該コーテイング被
膜を硬化させることによつて上記ブツシユの位置
ずれに対する耐圧を向上させかつ絶縁することを
特徴とする小型モータのロータ。1. In a rotor of a small motor in which a bush for restricting axial movement is fixed to a shaft that holds an iron core constituting the rotor, a metal bush configured to be inserted into the shaft with a weak force, and a bush that is configured to be inserted into the shaft with a weak force. an insulating coating film that is applied to the bush inserted into a temporary position of the shaft and the iron core and hardened with the bush set in a predetermined position, and by curing the coating film, the bush A rotor for a small motor, characterized by improved voltage resistance and insulation against misalignment of the motor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86101853.2A CN1005228B (en) | 1985-03-22 | 1986-03-19 | Rotor for miniature motor |
| GB08607076A GB2178246B (en) | 1985-03-22 | 1986-03-21 | Electric motor rotor |
| HK36191A HK36191A (en) | 1985-03-22 | 1991-05-09 | Electric motor rotor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5760485 | 1985-03-22 | ||
| JP60-57604 | 1985-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS622827A JPS622827A (en) | 1987-01-08 |
| JPH0514505B2 true JPH0514505B2 (en) | 1993-02-25 |
Family
ID=13060458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4282386A Granted JPS622827A (en) | 1985-03-22 | 1986-03-01 | Rotor of small sized motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS622827A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743029A (en) * | 1980-08-28 | 1982-03-10 | Nissan Motor Co Ltd | Pulley clutch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943734Y2 (en) * | 1979-03-24 | 1984-12-26 | ソニー株式会社 | semiconductor equipment |
-
1986
- 1986-03-01 JP JP4282386A patent/JPS622827A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743029A (en) * | 1980-08-28 | 1982-03-10 | Nissan Motor Co Ltd | Pulley clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS622827A (en) | 1987-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6658721B2 (en) | Method of manufacturing cores for rotary electric machines | |
| JP4038056B2 (en) | Rotating electric machine | |
| US20010038253A1 (en) | Miniature motor and method for manufacturing the same | |
| US5793138A (en) | Fabrication of induction motors | |
| JPH0715934A (en) | Motor | |
| US20040021375A1 (en) | Stepping motor and manufacturing method therefor | |
| JP3972598B2 (en) | Brushless motor and its terminal structure | |
| JP2001157393A (en) | Rotor structure for inner rotor-type motor | |
| JPH0514505B2 (en) | ||
| JP2847800B2 (en) | Mounting method of armature winding of slotless iron core | |
| JP2003230236A (en) | Dynamo-electric machine | |
| JP3632511B2 (en) | Motor insulation structure and motor stator manufacturing method | |
| JP3139195B2 (en) | PM type stepping motor rotor | |
| JPH07111747A (en) | Stator for motor | |
| JP3514984B2 (en) | Electromagnetic induction type rotation sensor | |
| CN1005228B (en) | Rotor for miniature motor | |
| JPH0880002A (en) | Molded motor | |
| JP2002369431A (en) | Dynamo-electric machine and manufacturing method therefor | |
| JPS6130502B2 (en) | ||
| JP3104286B2 (en) | Mold motor and method of manufacturing the same | |
| GB2042813A (en) | Manufacture of combined armature and commutator | |
| US20050040719A1 (en) | Rotor bush, motor equipped therewith, and manufacturing methods therefor | |
| JP2856615B2 (en) | Commutator of motor and rotor of motor | |
| JPH05328678A (en) | Coil | |
| JP2021191051A (en) | Coil rotary electric machine with high space factor |