JP3493971B2 - Flywheel magnet rotor and method of manufacturing the same - Google Patents
Flywheel magnet rotor and method of manufacturing the sameInfo
- Publication number
- JP3493971B2 JP3493971B2 JP25970697A JP25970697A JP3493971B2 JP 3493971 B2 JP3493971 B2 JP 3493971B2 JP 25970697 A JP25970697 A JP 25970697A JP 25970697 A JP25970697 A JP 25970697A JP 3493971 B2 JP3493971 B2 JP 3493971B2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- boss
- collar plate
- flywheel
- boss member
- 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
Links
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内燃機関で駆動さ
れる磁石発電機に用いられるフライホイール磁石回転子
とその製造方法とに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel magnet rotor used in a magnet generator driven by an internal combustion engine and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】内燃機関に装着されて該内燃機関により
駆動され、機関の点火電源や点灯、充電等の電源として
用いられるフライホイール磁石発電機は、発電コイルが
設けられていて内燃機関のクランクケースに固定される
固定子と、内燃機関のクランク軸で駆動されるフライホ
イール磁石回転子とを備えることにより構成される。2. Description of the Related Art A flywheel magnet generator mounted on an internal combustion engine and driven by the internal combustion engine and used as a power source for ignition, lighting, charging, etc. of the engine is provided with a generator coil and is provided with a crank of the internal combustion engine. It is configured by including a stator fixed to the case and a flywheel magnet rotor driven by the crankshaft of the internal combustion engine.
【０００３】図９は、フライホイール磁石発電機に用い
られている従来のフライホイール磁石回転子の一例を示
したものである。同図に示したフライホイール磁石回転
子１は、周壁部２１と該周壁部の軸線方向の一端側に形
成された底壁部２２とを一体に有して底壁部２２の中央
にボス貫通孔２２１が形成されたカップ状のヨーク２
と、ヨークの底壁部２２の外面に当接された円盤状の鍔
板部３１と該鍔板部の中央から片側に突出して軸線方向
に伸びるように形成されてヨークのボス貫通孔２２１を
貫通した状態でヨーク２内に挿入されたボス部３２とを
一体に有するボス部材３とからなっていて、ボス部材３
の鍔板部３１がヨーク２の底壁部２２にリベット４によ
り締結されたフライホイール５と、該フライホイールの
ヨーク２の周壁部２１の内周に固定された永久磁石６と
を備えている。ヨークの周壁部２１と底壁部２２との境
界部にはボス部材３の鍔部３１の外周側に向うに従って
該鍔板部から離れるようにアール（Ｒ）がつけられたコ
ーナ部２３が形成されている。FIG. 9 shows an example of a conventional flywheel magnet rotor used in a flywheel magnet generator. The flywheel magnet rotor 1 shown in FIG. 1 integrally includes a peripheral wall portion 21 and a bottom wall portion 22 formed at one end side of the peripheral wall portion in the axial direction, and has a boss penetrating in the center of the bottom wall portion 22. Cup-shaped yoke 2 having a hole 221 formed therein
And a disk-shaped collar plate portion 31 that is in contact with the outer surface of the bottom wall portion 22 of the yoke, and is formed so as to project in one direction from the center of the collar plate portion and extend in the axial direction to form the boss through hole 221 of the yoke. The boss member 3 integrally includes a boss portion 32 inserted into the yoke 2 in a penetrating state.
The collar plate portion 31 includes a flywheel 5 fastened to the bottom wall portion 22 of the yoke 2 by the rivets 4, and a permanent magnet 6 fixed to the inner circumference of the peripheral wall portion 21 of the yoke 2 of the flywheel. . At the boundary between the peripheral wall portion 21 and the bottom wall portion 22 of the yoke, a corner portion 23 having a radius (R) is formed so as to separate from the collar plate portion toward the outer peripheral side of the collar portion 31 of the boss member 3. Has been done.
【０００４】この種のフライホイール磁石回転子は、内
燃機関の回転を円滑にするため、該フライホイール磁石
回転子が取り付けられる機関の要求に応じた大きさの慣
性モーメントを有している必要がある。In order to make the internal combustion engine rotate smoothly, this type of flywheel magnet rotor must have an inertia moment of a magnitude that meets the requirements of the engine to which the flywheel magnet rotor is mounted. is there.
【０００５】フライホイール磁石回転子の慣性モーメン
トの大きさは、ヨーク２の外径や該ヨークの周壁部２１
及び底壁部２２の板状部の厚さ選定により所要の大きさ
にすることも可能であるが、この場合には要求される慣
性モーメントの大きさに応じてヨーク２を製作するため
の金型の変更が必要となって製作費用が高額になる。そ
のため、通常は、ボス部材３の鍔板部３１の外径を変更
してフライホイール磁石回転子の慣性モーメントの大き
さを所要の値にするようにしている。この場合、要求さ
れる慣性モーメントの値が大きいと、図９に示されてい
るように鍔板部３１の外径がヨークの周壁部２１の外径
よりも大きくなり、ヨークのコーナ部２３とボス部材の
鍔板部３１との間に狭間隙５１が形成される。The magnitude of the moment of inertia of the flywheel magnet rotor depends on the outer diameter of the yoke 2 and the peripheral wall portion 21 of the yoke 2.
It is also possible to make it a required size by selecting the thickness of the plate-shaped portion of the bottom wall portion 22, and in this case, a metal for manufacturing the yoke 2 according to the required magnitude of the moment of inertia. The production cost becomes high because the mold needs to be changed. Therefore, normally, the outer diameter of the collar plate portion 31 of the boss member 3 is changed to set the magnitude of the moment of inertia of the flywheel magnet rotor to a required value. In this case, when the required value of the moment of inertia is large, the outer diameter of the collar plate portion 31 becomes larger than the outer diameter of the peripheral wall portion 21 of the yoke as shown in FIG. A narrow gap 51 is formed between the boss member and the collar plate portion 31.
【０００６】ボス部材の鍔板部３１の外径がヨークの周
壁部２１の外径よりも大きく形成されている上記従来の
フライホイール磁石回転子は、次の工程を行うことによ
り製造される。即ち、上記のフライホイール磁石回転子
は、鉄板を絞り加工することにより、カップ状のヨーク
２を製作するヨーク製作工程と、円盤状の鍔板部３１の
外径がヨークの周壁部２１の外径よりも大きく形成され
たボス部材３を製作するボス部材製作工程と、ボス部材
の鍔板部３１をヨークの底壁部２２にリベット４でリベ
ット止めすることにより、ヨーク２とボス部材３とから
なるフライホイール５を組み立てるフライホイール組立
工程と、フライホイール５が組み立てられた後に、該フ
ライホイールを位置決め固定した状態でボス部材３のボ
ス部３２内にヨークの周壁部２１と中心軸線を共有する
テーパ孔３２１を形成するための加工と鍔板部３１の外
周３１ａを切削して円筒面状に仕上げる加工とを含む機
械加工を行う加工工程と、フライホイールのヨークの周
壁部２１の内周２１ａに磁石６を取り付ける磁石取付け
工程とを行うことにより製造される。The conventional flywheel magnet rotor in which the outer diameter of the collar plate portion 31 of the boss member is larger than the outer diameter of the peripheral wall portion 21 of the yoke is manufactured by the following steps. That is, in the above flywheel magnet rotor, a yoke manufacturing process for manufacturing the cup-shaped yoke 2 by drawing an iron plate is performed, and the outer diameter of the disk-shaped collar plate portion 31 is outside the peripheral wall portion 21 of the yoke. A boss member manufacturing process for manufacturing a boss member 3 having a diameter larger than the diameter, and riveting the collar plate portion 31 of the boss member to the bottom wall portion 22 of the yoke with the rivet 4 are performed, so that the yoke 2 and the boss member 3 are A flywheel assembling step of assembling the flywheel 5 consisting of, and after the flywheel 5 is assembled, the central axis is shared with the peripheral wall portion 21 of the yoke in the boss portion 32 of the boss member 3 with the flywheel positioned and fixed. A machining step including machining for forming a tapered hole 321 for cutting and machining for cutting the outer periphery 31a of the collar plate portion 31 to form a cylindrical surface; It is produced by performing a magnet mounting step of mounting the magnet 6 on the inner periphery 21a of the peripheral wall portion 21 of the eel York.
【０００７】[0007]
【発明が解決しようとする課題】ボス部材の鍔板部３１
の外径がヨークの周壁部２１の外径よりも大きく形成さ
れた従来のフライホイール磁石回転子では、既述のよう
に、ヨークの周壁部２１と底壁部２２との境界部にアー
ルがつけられて形成されたコーナ部２３とボス部材の鍔
板部３１との間に狭間隙５１が形成されている。そのた
め、フライホイール５が組み立てられた後に、ボス部の
鍔板部３１の外周３１ａを切削して円筒面に仕上げる機
械加工の工程において、鍔板部の外周３１ａの切削によ
り生ずる切削屑が狭間隙５１内に入って該狭間隙内に残
留することがある。この切削屑が、フライホイール磁石
回転子を内燃機関に装着した後にも狭間隙５１内に残っ
ていると、内燃機関の運転中に振動や遠心力によりこの
切削屑が狭間隙内から飛び出して、磁石発電機の発電コ
イルを損傷したり、内燃機関のオイルフィルタの目づま
りの原因となったりする恐れがあるので、狭間隙５１内
の残留切削屑の有無の確認及びその除去のための作業が
必要となるという問題があった。SUMMARY OF THE INVENTION Collar plate portion 31 of a boss member
In the conventional flywheel magnet rotor in which the outer diameter of the yoke is formed larger than the outer diameter of the peripheral wall portion 21 of the yoke, as described above, there is a radius at the boundary between the peripheral wall portion 21 and the bottom wall portion 22 of the yoke. A narrow gap 51 is formed between the corner portion 23 formed by being attached and the collar plate portion 31 of the boss member. Therefore, after the flywheel 5 is assembled, in the machining process of cutting the outer periphery 31a of the collar plate portion 31 of the boss portion to finish it into a cylindrical surface, cutting dust generated by cutting the outer periphery 31a of the collar plate portion has a narrow gap. It may enter into 51 and remain in the narrow gap. If the cutting debris remains in the narrow gap 51 even after the flywheel magnet rotor is mounted on the internal combustion engine, the cutting debris jumps out of the narrow gap due to vibration or centrifugal force during operation of the internal combustion engine. Since there is a risk of damaging the magneto coils of the magneto generator and causing clogging of the oil filter of the internal combustion engine, it is necessary to confirm the presence or absence of residual cutting debris in the narrow gap 51 and to remove it. There was a problem that became.
【０００８】本発明の目的は、ボス部材の鍔板部の外周
を切削して円筒面状に仕上げる機械加工の加工工程で生
ずる切削屑が、ヨークのコーナ部とボス部材の鍔板部と
の間に形成されている狭間隙に入り込むことがないよう
にして、狭間隙内の切削屑の有無の点検や除去作業を不
要にするとともに、内燃機関の運転中に切削屑が飛び出
して発電コイルの損傷やオイルフィルタの目づまりなど
が生ずる恐れがないようにしたフライホイール磁石回転
子とその製造方法とを提供することにある。It is an object of the present invention that cutting scraps generated in the machining process of cutting the outer periphery of the collar plate portion of the boss member to finish it into a cylindrical surface form between the corner portion of the yoke and the collar plate portion of the boss member. It is not necessary to inspect and remove the cutting debris in the narrow gap so that it does not enter the narrow gap formed between them, and the cutting debris pops out during operation of the internal combustion engine and It is an object of the present invention to provide a flywheel magnet rotor and a manufacturing method thereof, in which there is no risk of damage or clogging of an oil filter.
【０００９】[0009]
【課題を解決するための手段】本発明が対象とするフラ
イホイール磁石回転子は、周壁部と該周壁部の軸線方向
の一端側に形成された底壁部とを一体に有して該底壁部
の中央にボス貫通孔が形成されたカップ状のヨークと、
該ヨークの周壁部の外径よりも大きな外径を有するよう
に形成され、ヨークの底壁部の外面に当接された円盤状
の鍔板部と該鍔板部の中央から片側に突出して軸線方向
に伸びるように形成されてヨークのボス貫通孔を貫通し
た状態でヨーク内に挿入されたボス部とを一体に有する
ボス部材とからなっていて、ボス部材の鍔板部がヨーク
の底壁部にリベットにより締結されたフライホイール
と、フライホイールのヨークの周壁部の内周に固定され
た永久磁石とを備えたものである。この種のフライホイ
ール磁石回転子では、ヨークの周壁部と底壁部との境界
部に、ボス部材の鍔板部の外周側に向うに従って該鍔板
部から離れるようにアールがつけられたコーナ部が形成
されている。A flywheel magnet rotor, to which the present invention is directed, integrally includes a peripheral wall portion and a bottom wall portion formed on one end side in the axial direction of the peripheral wall portion. A cup-shaped yoke with a boss through hole formed in the center of the wall,
A disk-shaped collar plate portion formed to have an outer diameter larger than the outer diameter of the peripheral wall portion of the yoke and abutting on the outer surface of the bottom wall portion of the yoke, and protruding from one side of the center of the collar plate portion. A boss member that is integrally formed with a boss portion that is formed so as to extend in the axial direction and that penetrates the boss through hole of the yoke and that is inserted into the yoke, and the collar plate portion of the boss member is the bottom of the yoke. It is provided with a flywheel fastened to the wall portion by rivets and a permanent magnet fixed to the inner periphery of the peripheral wall portion of the yoke of the flywheel. In this type of flywheel magnet rotor, a corner is provided at the boundary between the peripheral wall portion and the bottom wall portion of the yoke so that the corner portion is separated from the collar plate portion toward the outer peripheral side of the collar plate portion of the boss member. Parts are formed.
【００１０】本発明においては、ボス部材の鍔板部の外
周を切削加工する際に生ずる切削屑がヨークのコーナ部
と前記鍔板部との間に形成された狭間隙内に入りこまな
いようにするため、鍔板部の外周寄りの部分に、ヨーク
側に突出した環状の突出壁を形成する。この環状の突出
壁は、ヨークの周壁部の外径よりも小さい内径を有する
ように形成されていて、該突出壁の先端がヨークのコー
ナ部の鍔板部から外れた部分に当接されて、該突出壁に
より前記狭間隙が塞がれている。According to the present invention, the cutting debris generated when the outer periphery of the collar plate portion of the boss member is cut is prevented from entering the narrow gap formed between the corner portion of the yoke and the collar plate portion. Therefore, an annular projecting wall projecting toward the yoke is formed in a portion of the collar plate portion near the outer periphery. The annular protruding wall is formed to have an inner diameter smaller than the outer diameter of the peripheral wall portion of the yoke, and the tip of the protruding wall is brought into contact with a portion of the corner portion of the yoke that is off the collar plate portion. The narrow gap is closed by the protruding wall.
【００１１】上記のように構成すると、ヨークのコーナ
部と鍔板部との間に形成された狭間隙が、鍔板部に形成
された環状の突出壁により塞がれるため、該狭間隙に切
削屑が入り込むのを防ぐことができる。したがって、該
狭間隙内から切削屑を除去する面倒な作業を省略するこ
とができ、フライホイール磁石回転子の製造を容易にす
ることができる。With the above construction, the narrow gap formed between the corner portion of the yoke and the collar plate portion is closed by the annular protruding wall formed on the collar plate portion, so that the narrow gap is maintained. It is possible to prevent cutting chips from entering. Therefore, the troublesome work of removing the cutting chips from the narrow gap can be omitted, and the manufacture of the flywheel magnet rotor can be facilitated.
【００１２】上記の構成のフライホイール磁石回転子
は、鉄板を絞り加工することにより、カップ状のヨーク
を製作するヨーク製作工程と、ヨークの周壁部の外径よ
りも大きな外径を有するように形成された円盤状の鍔板
部と該鍔板部の中央から片側に突出して軸線方向に伸び
るボス部とを一体に有するボス部材を製作するボス部材
製作工程と、該ボス部材のボス部をヨークのボス貫通孔
を通してヨーク内に挿入して該ボス部材の鍔板部をヨー
クの底壁部の外面に対向させた状態で、ボス部材の鍔板
部をヨークの底壁部にリベットとめすることにより、ヨ
ークとボス部材とからなるフライホイールを組み立てる
フライホイール組立工程と、フライホイールが組み立て
られた後に、該フライホイールを位置決め固定した状態
でボス部材のボス部内にヨークの周壁部と中心軸線を共
有するテーパ孔を形成する加工と鍔板部の外周を切削し
て円筒面状に仕上げる加工とを含む機械加工を行う加工
工程と、フライホイールのヨークの周壁部の内周に磁石
を取り付ける磁石取付け工程とを行うことにより製造す
ることができる。The flywheel magnet rotor having the above-mentioned structure has a yoke manufacturing process for manufacturing a cup-shaped yoke by drawing an iron plate and an outer diameter larger than the outer diameter of the peripheral wall of the yoke. A boss member manufacturing step of manufacturing a boss member integrally having a formed disk-shaped collar plate portion and a boss portion projecting to one side from the center of the collar plate portion and extending in the axial direction, and a boss portion of the boss member. The collar plate portion of the boss member is riveted to the bottom wall portion of the yoke while being inserted into the yoke through the boss through hole of the yoke and the collar plate portion of the boss member facing the outer surface of the bottom wall portion of the yoke. Accordingly, a flywheel assembling step of assembling a flywheel including a yoke and a boss member, and a boss portion of the boss member with the flywheel positioned and fixed after the flywheel is assembled. A machining process including forming a tapered hole that shares a central axis with the peripheral wall of the yoke and cutting the outer periphery of the collar plate into a cylindrical surface, and the peripheral wall of the flywheel yoke. It can be manufactured by performing a magnet attaching step of attaching a magnet to the inner circumference of the portion.
【００１３】本発明に係わる製造方法においては、上記
ボス部材製作工程でボス部材を形成する際に、ボス部材
の鍔板部の外周寄りの部分からボス部と同じ側に突出し
た環状の突出壁を、ヨークの周壁部の外径よりも小さい
内径をもたせた状態で形成しておき、ボス部材の鍔板部
をヨークの底壁部にリベットとめする際に、ボス部材の
突出壁をヨークの周壁部と底壁部との間の境界部に形成
されたコーナ部に当接させて、ボス部材の鍔板部をヨー
クの底壁部に締結するリベットをかしめる際の力によ
り、突出壁の先端部を径方向の外側に反らせるように変
形させて、該突出壁の先端部をヨークのコーナ部外面に
押圧し、ボス部材の突出壁により、ヨークのコーナ部と
ボス部材の鍔板部との間に形成された狭間隙を塞いだ後
に、前記の加工工程を行う。In the manufacturing method according to the present invention, when the boss member is formed in the boss member manufacturing step, an annular projecting wall that projects from the outer peripheral portion of the collar plate portion of the boss member to the same side as the boss portion is formed. Is formed with an inner diameter smaller than the outer diameter of the peripheral wall portion of the yoke, and when the collar plate portion of the boss member is riveted to the bottom wall portion of the yoke, the protruding wall of the boss member is The protruding wall is abutted against the corner portion formed at the boundary between the peripheral wall portion and the bottom wall portion to clamp the collar plate portion of the boss member to the bottom wall portion of the yoke by caulking the rivet. The tip portion of the protruding wall is deformed so as to be bent outward, and the tip portion of the protruding wall is pressed against the outer surface of the corner portion of the yoke. After closing the narrow gap formed between the Do.
【００１４】上記のように、鍔板部の突出壁の先端部を
ヨークのコーナ部外面に押圧した状態でボス部材の鍔板
部をヨークの底壁部にリベット止めするようにすると、
ヨークのコーナ部とボス部材の鍔板部との間の狭間隙を
前記突出壁で完全に閉塞できるので、鍔板部の外周の切
削加工工程で生ずる切削屑が前記狭間隙の内部に入り込
むのを防止することができる。As described above, when the tip of the protruding wall of the collar plate is pressed against the outer surface of the corner of the yoke, the collar plate of the boss member is riveted to the bottom wall of the yoke.
Since the narrow gap between the corner portion of the yoke and the collar plate portion of the boss member can be completely closed by the projecting wall, cutting waste generated in the cutting process of the outer periphery of the collar plate portion enters the inside of the narrow gap. Can be prevented.
【００１５】[0015]
【発明の実施の形態】次に、添付図面を参照して本発明
の実施の形態を説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings.
【００１６】図１（Ａ），（Ｂ）は本発明に係わるフラ
イホイール磁石回転子の構成例を示したもので、同図
（Ａ）は正面図、（Ｂ）は（Ａ）のＹ−Ｏ−Ｙ´線断面
図である。また図２は図１（Ｂ）のＭ部を拡大して示し
たものである。FIGS. 1 (A) and 1 (B) show an example of the configuration of a flywheel magnet rotor according to the present invention. FIG. 1 (A) is a front view and FIG. 1 (B) is Y- of FIG. It is a OY 'line sectional view. In addition, FIG. 2 is an enlarged view of the M portion of FIG.
【００１７】これらの図において、フライホイール磁石
回転子１は、カップ状のヨーク２とボス部材３とが複数
個（本実施例では６個）のリベット４により締結された
フライホイール５と、ヨーク２の内周に固定された複数
個（本実施例では４個）の永久磁石６とを備えている。In these figures, a flywheel magnet rotor 1 includes a flywheel 5 in which a cup-shaped yoke 2 and a boss member 3 are fastened together by a plurality of rivets 4 (six in this embodiment), and a yoke. 2 and a plurality of (four in this embodiment) permanent magnets 6 fixed to the inner circumference.
【００１８】ヨーク２は、鉄板を絞り加工することによ
り周壁部２１と該周壁部の軸線方向の一端側に形成され
た底壁部２２とを一体に有してカップ状に形成され、底
壁部２２の中央には、ボス貫通孔２２１が形成されてい
る。ヨークの周壁部２１と底壁部２２との境界部には、
ボス部材３の鍔板部３１の外周側に向うに従って該鍔板
部から離れるようにアール（Ｒ）がつけられたコーナ部
２３が形成されている。ヨークの周壁部２１の外周の径
方向の対称位置には、図示しない信号発電子に内燃機関
の点火位置で点火信号を発生させるための一対のリラク
タ２１１，２１１が径方向の外側に突出した状態で形成
されている。The yoke 2 is formed in a cup shape by integrally forming a peripheral wall portion 21 and a bottom wall portion 22 formed at one end side in the axial direction of the peripheral wall portion by drawing an iron plate, and forming a bottom wall. A boss through hole 221 is formed in the center of the portion 22. At the boundary between the peripheral wall portion 21 and the bottom wall portion 22 of the yoke,
A corner portion 23 having a radius (R) is formed so as to be separated from the collar plate portion 31 of the boss member 3 toward the outer peripheral side thereof. At a radially symmetrical position on the outer circumference of the peripheral wall portion 21 of the yoke, a state in which a pair of reluctors 211 and 211 for causing an unillustrated signal generating electron to generate an ignition signal at an ignition position of the internal combustion engine protrudes outward in the radial direction. Is formed by.
【００１９】ボス部材３は、ヨークの底壁部２２の外面
に当接される円盤状の鍔板部３１と、該鍔板部の中央か
ら片側に突出して軸線方向に伸びるように形成されてヨ
ークのボス貫通孔２２１を貫通した状態でヨーク２内に
挿入されたボス部３２とを鋼材により一体に形成したも
のからなっている。図示の例では、鍔板部３１のボス部
３２が突出する側と反対の側に、図示しないスタータク
ラッチが取付けられるクラッチ取付凹部３１１が形成さ
れている。凹部３１１の内周はインロー部３１１ａとな
っていて、該インロー部３１１ａに図示しないスタータ
クラッチが嵌合される。該スタータクラッチは、凹部３
１１の底面３１１ｂに当接されて、鍔板部３１に形成さ
れたねじ挿通孔３１２に挿通される図示しない取付ねじ
により鍔板部３１に固定される。ボス部材３のボス部３
２内には、フライホイール磁石回転子１を内燃機関のク
ランク軸を嵌合させるためのテーパ孔３２１と、該回転
子とクランク軸との間の回り止めを図るキーを挿入する
ためのキー溝３２２とが形成されている。The boss member 3 is formed so as to be in contact with the outer surface of the bottom wall portion 22 of the yoke and has a disk-shaped collar plate portion 31 and to project from the center of the collar plate portion to one side and extend in the axial direction. The boss portion 32 inserted into the yoke 2 in a state of penetrating the boss through hole 221 of the yoke is integrally formed of a steel material. In the illustrated example, a clutch mounting recess 311 to which a starter clutch (not shown) is mounted is formed on the side of the collar plate 31 opposite to the side on which the boss 32 projects. The inner periphery of the recess 311 is a spigot portion 311a, and a starter clutch (not shown) is fitted into the spigot portion 311a. The starter clutch has a recess 3
It is fixed to the collar plate portion 31 by a mounting screw (not shown) which is brought into contact with the bottom surface 311b of 11 and is inserted into the screw insertion hole 312 formed in the collar plate portion 31. Boss part 3 of boss member 3
2, a tapered hole 321 for fitting the flywheel magnet rotor 1 into the crankshaft of the internal combustion engine, and a key groove for inserting a key for preventing rotation between the rotor and the crankshaft. And 322 are formed.
【００２０】ボス部材３は、該ボス部材の鍔板部３１に
形成されたリベット孔３１３とヨークの底壁部２２に形
成されたリベット孔２２２とに挿通された複数個（本実
施例では６個）のリベット４によりヨーク２に締結され
ている。A plurality of boss members 3 are inserted into rivet holes 313 formed in the collar plate portion 31 of the boss member and rivet holes 222 formed in the bottom wall portion 22 of the yoke (in this embodiment, 6). The rivet 4 is attached to the yoke 2.
【００２１】ヨークの周壁部２１の内周には磁石位置決
め突起２１２が形成されていて、該磁石位置決め突起に
より軸線方向の位置決めがなされた複数個（本実施例で
は４個）のフェライト磁石からなる永久磁石６が周方向
に等角度間隔を開けた状態で配置されてヨークの周壁部
２１の内周に接着により固定されている。該複数個の永
久磁石６は、フライホイールの周方向に交互に異極の磁
極が並ぶように着磁されている（径方向着磁）。A magnet positioning protrusion 212 is formed on the inner circumference of the peripheral wall portion 21 of the yoke, and is composed of a plurality of (four in this embodiment) ferrite magnets that are axially positioned by the magnet positioning protrusion. The permanent magnets 6 are arranged at equal angular intervals in the circumferential direction and fixed to the inner circumference of the peripheral wall portion 21 of the yoke by adhesion. The plurality of permanent magnets 6 are magnetized so that magnetic poles having different poles are alternately arranged in the circumferential direction of the flywheel (diameter direction magnetization).
【００２２】本発明のフライホイール磁石回転子１で
は、図２に示すように、ボス部材の鍔板部３１の外周寄
りの部分に、ヨーク２側に突出した環状の突出壁３３が
形成されている。環状の突出壁３３の内径は、最初のヨ
ークの周壁部２１の外径よりも小さく設定され、ボス部
材の鍔板部３１がリベット４によりヨークの底壁部２２
に締結された状態にされたときに、環状の突出壁３３の
先端がヨークのコーナ部２３の鍔板部３１から外れた部
分に当接して、該突出壁３３により、ヨークのコーナ部
２３とボス部材の鍔板部３１との間に形成されている狭
間隙５１が塞がれた状態になるようになっている。In the flywheel magnet rotor 1 of the present invention, as shown in FIG. 2, an annular projecting wall 33 projecting toward the yoke 2 is formed in a portion of the boss member near the outer periphery of the collar plate portion 31. There is. The inner diameter of the annular protruding wall 33 is set to be smaller than the outer diameter of the peripheral wall portion 21 of the first yoke, and the collar plate portion 31 of the boss member is fixed by the rivets 4 to the bottom wall portion 22 of the yoke.
When they are fastened to each other, the tip of the annular protruding wall 33 comes into contact with a portion of the corner portion 23 of the yoke that is separated from the collar plate portion 31, and the protruding wall 33 causes the corner portion 23 of the yoke to move. The narrow gap 51 formed between the boss member and the collar plate portion 31 is closed.
【００２３】上記のように、環状の突出壁３３を形成し
て、該突出壁により狭間隙５１を塞ぐようにすると、ボ
ス部材３をヨーク２に締結してフライホイール５を組み
立てた後、鍔板部３１の外周を切削加工した際に生ずる
切削屑などが狭間隙５１内に入るのを防ぐことができ
る。As described above, when the annular protruding wall 33 is formed so that the narrow gap 51 is closed by the protruding wall, the boss member 3 is fastened to the yoke 2 and the flywheel 5 is assembled, and then the collar 5 is assembled. It is possible to prevent cutting chips and the like generated when the outer periphery of the plate portion 31 is cut from entering the narrow gap 51.
【００２４】上記のフライホイール磁石回転子１は、カ
ップ状のヨーク２を製作するヨーク製作工程と、ボス部
材３を製作するボス部材製作工程と、ボス部材３の鍔板
部３１をリベット４によりヨーク２の底壁部２２に締結
してフライホイール５を組み立てるフライホイール組立
工程と、フライホイール５が組み立てられた後にテーパ
孔３２１及びキー溝３２２を形成する加工と鍔板部３１
の外周を切削して円筒状に仕上げる加工とを含む機械加
工を行う加工工程と、ヨーク２の周壁部２１の内周に永
久磁石６を取り付ける磁石取付工程とを行うことにより
製造される。In the flywheel magnet rotor 1 described above, the yoke manufacturing process for manufacturing the cup-shaped yoke 2, the boss member manufacturing process for manufacturing the boss member 3, and the collar plate portion 31 of the boss member 3 by the rivets 4. A flywheel assembling step of assembling the flywheel 5 by fastening it to the bottom wall portion 22 of the yoke 2, a process of forming a tapered hole 321 and a key groove 322 after the flywheel 5 is assembled, and a collar plate portion 31.
It is manufactured by performing a machining process including a process of cutting the outer periphery of the to finish into a cylindrical shape and a magnet attaching process of attaching the permanent magnet 6 to the inner periphery of the peripheral wall portion 21 of the yoke 2.
【００２５】ヨーク製作工程では、鉄板を絞り加工する
ことにより、図３（Ａ），（Ｂ）に示すように、周壁部
２１と該周壁部の軸線方向の一端側に形成された底壁部
２２とを一体に有し、周壁部２１と底壁部２２との境界
部のコーナ部２３にアール（Ｒ）がつけられたカップ状
のヨーク２を製作する。ヨークの周壁部２１には、該周
壁部の一部を打出すことにより、外方に突出した一対の
リラクタ２１１，２１１が形成されている。また該ヨー
クの周壁部２１には、内方に突出した複数個の磁石位置
決め突起２１２，２１２，…が形成されている。ヨーク
２の底壁部２２の中央には、打抜きにより形成されたボ
ス貫通孔２２１が形成され、該ボス貫通孔の周囲には、
周方向に等角度間隔を開けた状態で穿設された複数個
（本実施例では６個）のリベット孔２２２，２２２，…
と、隣り合うリベット孔の中間位置に穿設された複数個
（本実施例では６個）のねじ頭逃し孔２２３，２２３，
…とがそれぞれ形成される。In the yoke manufacturing process, as shown in FIGS. 3A and 3B, the iron plate is drawn to form the peripheral wall portion 21 and the bottom wall portion formed on one end side of the peripheral wall portion in the axial direction. A cup-shaped yoke 2 having an integral part 22 and a rounded corner (R) at a boundary portion 23 between the peripheral wall portion 21 and the bottom wall portion 22 is manufactured. The peripheral wall portion 21 of the yoke is formed with a pair of reluctors 211 and 211 protruding outward by punching out a part of the peripheral wall portion. Further, a plurality of magnet positioning protrusions 212, 212, ... Inwardly protruding are formed on the peripheral wall portion 21 of the yoke. A boss through hole 221 formed by punching is formed in the center of the bottom wall portion 22 of the yoke 2, and around the boss through hole,
A plurality of (six in this embodiment) rivet holes 222, 222, ... Perforated at equal angular intervals in the circumferential direction.
And a plurality of (six in this embodiment) screw head relief holes 223, 223, which are provided at intermediate positions of the adjacent rivet holes.
... and are formed respectively.
【００２６】なおネジ頭逃し孔２２３，２２３，…は、
前述の図示しないスタータクラッチ取付け用の取付ねじ
の頭部を逃す（収容する）ためのものである。The screw head relief holes 223, 223, ...
This is for releasing (accommodating) the head portion of the mounting screw for mounting the starter clutch (not shown).
【００２７】ボス部材製作工程では、鋼材の冷間鍛造あ
るいは熱間鍛造と必要部分の切削加工とにより、ボス部
材３を形成する。このボス部材は、図４に示すように、
ヨークの周壁部２１の外径よりも大きな外径を有する円
盤状の鍔板部３１と、該鍔板部の中央から片側に突出し
て軸線方向に伸びるボス部３２とを一体に有するもの
で、その鍔板部３１の外周寄りの部分には、ボス部３２
と同じ側に突出した環状の突出壁３３を、ヨークの周壁
部２１の外径よりも小さい内径を持たせた状態で形成す
る。In the boss member manufacturing process, the boss member 3 is formed by cold forging or hot forging of a steel material and cutting of a necessary portion. This boss member, as shown in FIG.
A disc-shaped collar plate portion 31 having an outer diameter larger than the outer diameter of the peripheral wall portion 21 of the yoke, and a boss portion 32 projecting to one side from the center of the collar plate portion and extending in the axial direction are integrally formed, A boss portion 32 is provided at a portion near the outer periphery of the collar plate portion 31.
An annular projecting wall 33 projecting on the same side as is formed with an inner diameter smaller than the outer diameter of the peripheral wall portion 21 of the yoke.
【００２８】本実施形態では更に、ボス部３２内を貫通
した状態でテーパ孔３２１を形成するとともに、鍔板部
３１のボス部３２と反対側の部分にクラッチ取付凹部３
１１を形成し、鍔板部３１を貫通した複数個（本実施例
では６個）のリベット孔３１３と、複数個（本実施例で
は６個）のねじ挿通孔３１２（図１参照）とを、クラッ
チ取付凹部３１１の底面に開口させた状態で形成する。Further, in this embodiment, the tapered hole 321 is formed so as to penetrate through the boss portion 32, and the clutch mounting recess 3 is formed in the portion of the collar plate portion 31 opposite to the boss portion 32.
11 and forming a plurality of (six in this embodiment) rivet holes 313 penetrating the collar plate portion 31 and a plurality (six in this embodiment) of screw insertion holes 312 (see FIG. 1). It is formed in a state where it is opened at the bottom surface of the clutch mounting recess 311.
【００２９】なおボス部材３は、その鍔板部３１の外周
３１ａと、テーパ孔３２１の内周と、クラッチ取付凹部
３１１の内周面３１１ａ及び底面３３１ｂとにそれぞ
れ、図４，図５、図６等に鎖線で示した仕上げ切削代を
残した状態で形成する。The boss member 3 has an outer circumference 31a of the flange plate portion 31, an inner circumference of the tapered hole 321, and an inner circumferential surface 311a and a bottom surface 331b of the clutch mounting recess 311, respectively, as shown in FIGS. It is formed in the state where the finishing cutting allowance indicated by the chain line is left on 6th grade.
【００３０】フライホイール組立工程では、ボス部材製
作工程で製作したボス部材３（図４参照）のボス部３２
を、ヨーク製作工程で製作したヨーク２（図３参照）の
ボス貫通孔２２１を通してヨーク２内に挿入する。そし
て、ボス部材の鍔板部３１をヨークの底壁部２２に対向
させた状態で、図５に示すようにヨークの底壁部２２の
リベット孔２２２とボス部材の鍔板部３１のリベット孔
３１３とを通してリベット４を挿通し、該リベットによ
り図６に示すようにボス部材の鍔板部３１をヨークの底
壁部２２に締結する。このリベット止めを行う際に、ボ
ス部材に形成された環状の突出壁３３をヨークの周壁部
２１と底壁部２２との間の境界部に形成されたコーナ部
２３に当接させて、リベット４をかしめる際の力により
突出壁３３の先端部を径方向の外側に反らせるように変
形させて、該突出壁の先端部をヨークのコーナ部２３の
外面に押圧し、図７に示すように突出壁３３によりヨー
クのコーナ部２３とボス部材の鍔板部３１との間に形成
された狭間隙５１を閉鎖する。In the flywheel assembly process, the boss portion 32 of the boss member 3 (see FIG. 4) manufactured in the boss member manufacturing process.
Is inserted into the yoke 2 through the boss through hole 221 of the yoke 2 (see FIG. 3) manufactured in the yoke manufacturing process. Then, with the collar plate portion 31 of the boss member facing the bottom wall portion 22 of the yoke, as shown in FIG. 5, the rivet hole 222 of the bottom wall portion 22 of the yoke and the rivet hole of the collar plate portion 31 of the boss member are shown. The rivet 4 is inserted through the rivet 313, and the collar plate portion 31 of the boss member is fastened to the bottom wall portion 22 of the yoke by the rivet as shown in FIG. When this riveting is performed, the annular protruding wall 33 formed on the boss member is brought into contact with the corner portion 23 formed at the boundary between the peripheral wall portion 21 and the bottom wall portion 22 of the yoke, and the rivet is formed. 4, the tip of the protruding wall 33 is deformed so as to be warped outward in the radial direction by the force of caulking, and the tip of the protruding wall is pressed against the outer surface of the corner portion 23 of the yoke, as shown in FIG. The protruding wall 33 closes the narrow gap 51 formed between the corner portion 23 of the yoke and the collar plate portion 31 of the boss member.
【００３１】フライホイール５の機械加工を行う加工工
程では、フライホイール組立工程により組み立てられた
フライホイール５（図６参照）のヨークの底壁部２２の
内側面２２ａと周壁部２１の内周面２１ａとにフライホ
イール取付治具を当接させてフライホイール５を位置決
め固定した状態で、図８に切削仕上精度記号（逆三角
形）を付して示す面の仕上げ切削加工を行う。この切削
加工では、ボス部内のテーパ孔３２１，リラクタ２１１
の外周面、鍔板部の外周面３１ａ及びクラッチ取付凹部
３１１の内周面３１１ａの中心軸心をヨークの周壁部２
１の内周面２１ａの中心軸線と一致させ、またクラッチ
取付凹部３１１の底面３１１ｂとヨークの底壁部２２の
内側面２２ａとの間の距離を所定値とするように、各部
の仕上加工を行う。キー溝３２２は所定の周方向角度位
置に形成するるように加工する。In the machining process for machining the flywheel 5, the inner surface 22a of the bottom wall 22 and the inner peripheral surface of the peripheral wall 21 of the yoke of the flywheel 5 (see FIG. 6) assembled in the flywheel assembling process. In the state where the flywheel 5 is positioned and fixed by bringing the flywheel mounting jig into contact with 21a, the surface of the surface indicated by the cutting finish accuracy symbol (inverted triangle) in FIG. 8 is subjected to finish cutting. In this cutting process, the taper hole 321 in the boss portion, the reluctor 211
Of the outer peripheral surface of the yoke plate, the outer peripheral surface 31a of the collar plate portion and the inner peripheral surface 311a of the clutch mounting recess 311 to the peripheral wall portion 2 of the yoke.
Finishing of each part is performed so as to match the center axis of the inner peripheral surface 21a of No. 1 and the distance between the bottom surface 311b of the clutch mounting recess 311 and the inner side surface 22a of the bottom wall portion 22 of the yoke to a predetermined value. To do. The key groove 322 is processed so as to be formed at a predetermined angular position in the circumferential direction.
【００３２】磁石取付け工程では、図１に示したよう
に、ヨークの周壁部２１の内周に複数個（本実施例では
４個）の永久磁石４を磁石位置決め突起２１２に当接さ
せてそれぞれの軸線方向位置を定めるとともに、周方向
に等角度間隔をあけた状態で所定の角度位置に配置して
接着により周壁部２１に固定する。該永久磁石は、フラ
イホイールの周方向に交互に異極性の磁極が並ぶように
径方向に着磁する。In the magnet mounting step, as shown in FIG. 1, a plurality of (four in this embodiment) permanent magnets 4 are brought into contact with the magnet positioning protrusions 212 on the inner periphery of the peripheral wall portion 21 of the yoke, respectively. The axial position is determined, and it is fixed to the peripheral wall portion 21 by adhesion by arranging it at a predetermined angular position in the state of being equiangularly spaced in the circumferential direction. The permanent magnet is magnetized in the radial direction so that magnetic poles of opposite polarities are alternately arranged in the circumferential direction of the flywheel.
【００３３】上記本発明によるフライホイール磁石回転
子１の製造方法では、ボス部材の鍔板部３１の外周寄り
の部分に形成した環状の突出壁３３の先端部が、鍔板部
３１をヨークの底壁部２２にリベット止める際にヨーク
のコーナ部２３の外面を押圧した状態にすることによ
り、突出壁３３によって狭間隙５１を完全に塞ぐように
したので、鍔板部３１の外周３１ａを切削加工する際に
生ずる切削屑が狭間隙５１内に入ることがない。In the method of manufacturing the flywheel magnet rotor 1 according to the present invention, the tip end of the annular protruding wall 33 formed in the portion of the boss member near the outer periphery of the collar plate portion 31 causes the collar plate portion 31 to serve as a yoke. Since the narrow wall 51 is completely closed by the protruding wall 33 by pressing the outer surface of the corner portion 23 of the yoke when riveting to the bottom wall portion 22, the outer periphery 31a of the collar plate portion 31 is cut. Cutting chips generated during processing do not enter the narrow gap 51.
【００３４】[0034]
【発明の効果】以上のように、本発明では、ボス部材の
鍔板部の外径がカップ状のヨークの周壁部の外径よりも
大きく形成されているフライホイール磁石回転子におい
て、ボス部材の鍔板部の外周寄りの部分にヨーク側に突
出した環状の突出壁を形成して、該突出壁により、ヨー
クのコーナ部とボス部材の鍔板部との間に形成された狭
間隙を塞ぐようにしたので、ボス部材の鍔板部の外周を
切削して円筒状に仕上げる際に生じる切削屑が狭間隙内
に侵入するのを防ぐことができる。そのため、従来は必
要であった狭間隙内の切削屑の有無の点検や、切削屑の
除去作業を省略してフライホイール磁石回転子の製造を
容易にすることができ、また除去できなかった切削屑が
フライホイール磁石発電機の運転中に飛び出して発電コ
イルの損傷などの事故を引き起すおそれを無くすことが
できる。As described above, according to the present invention, in the flywheel magnet rotor in which the outer diameter of the collar plate portion of the boss member is larger than the outer diameter of the peripheral wall portion of the cup-shaped yoke, the boss member is provided. An annular projecting wall projecting toward the yoke is formed in a portion near the outer periphery of the collar plate portion of the above, and the narrow wall formed between the corner portion of the yoke and the collar plate portion of the boss member is formed by the projecting wall. Since it is configured to be closed, it is possible to prevent the cutting dust generated when the outer periphery of the collar plate portion of the boss member is cut and finished into a cylindrical shape from entering the narrow gap. Therefore, it is possible to facilitate the manufacture of the flywheel magnet rotor by omitting the inspection work for the presence of cutting debris within the narrow gap and the removal of cutting debris that were required in the past, and the cutting that could not be removed. It is possible to eliminate the risk that dust may fly out during operation of the flywheel magnet generator and cause an accident such as damage to the magneto coil.
【図１】本発明に係わるフライホイール磁石回転子の構
成例を示したもので、（Ａ）は正面図、（Ｂ）は（Ａ）
のＹ−Ｏ−Ｙ´線断面図である。FIG. 1 shows a configuration example of a flywheel magnet rotor according to the present invention, (A) is a front view, and (B) is (A).
2 is a cross-sectional view taken along line Y-O-Y 'of FIG.
【図２】図１（Ｂ）のＭ部の拡大図である。FIG. 2 is an enlarged view of an M portion of FIG.
【図３】図１のフライホイール磁石回転子のヨーク製造
工程で製作されるヨークを示したもので、（Ａ）は正面
図、（Ｂ）は（Ａ）のＹ−Ｏ−Ｙ´線断面図である。3A and 3B show a yoke manufactured in a yoke manufacturing process of the flywheel magnet rotor shown in FIG. 1, where FIG. 3A is a front view and FIG. 3B is a cross section taken along line Y-O-Y 'in FIG. 3A. It is a figure.
【図４】図１のフライホイール磁石回転子のボス部材製
作工程で製作されるボス部材の半部の縦断面図である。4 is a vertical cross-sectional view of a half portion of a boss member manufactured in a boss member manufacturing process of the flywheel magnet rotor of FIG.
【図５】図１の本発明に係る製造方法のフライホイール
組立工程中におけるフライホイールの半部の縦断面図で
ある。FIG. 5 is a vertical cross-sectional view of a half portion of the flywheel during the flywheel assembling process of the manufacturing method according to the present invention in FIG. 1.
【図６】図１のフライホイール磁石回転子のフライホイ
ール組立工程で組み立てられたフライホイールの半部を
示した縦断面図である。6 is a longitudinal sectional view showing a half portion of a flywheel assembled in a flywheel assembling process of the flywheel magnet rotor of FIG. 1. FIG.
【図７】図６の要部の拡大断面図である。7 is an enlarged cross-sectional view of the main part of FIG.
【図８】図１のフライホイール磁石回転子のフライホイ
ールの機械加工工程で加工される箇所を示したフライホ
イールの半部縦断面図である。8 is a vertical cross-sectional view of a part of the flywheel showing a portion processed in a machining process of the flywheel of the flywheel magnet rotor of FIG. 1. FIG.
【図９】従来のフライホイール磁石回転子の一例を示し
た縦断面図である。FIG. 9 is a vertical sectional view showing an example of a conventional flywheel magnet rotor.
１ フライホイール磁石回転子 ２ ヨーク ２１ 周壁部 ２２ 底壁部 ２２１ ボス貫通孔 ２３ コーナ部 ３ ボス部材 ３１ 鍔板部 ３２ ボス部 ３２１ テーパ孔 ３３ 突出壁 ４ リベット ５ フライホイール ５１ 狭間隙 ６ 永久磁石 1 Flywheel magnet rotor 2 York 21 Peripheral wall 22 Bottom wall 221 Boss through hole 23 Corner section 3 Boss member 31 Collar plate 32 Boss 321 taper hole 33 protruding wall 4 rivets 5 flywheel 51 narrow gap 6 permanent magnet
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 21/22 H02K 1/27 502 H02K 15/03 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H02K 21/22 H02K 1/27 502 H02K 15/03
Claims (2)
形成された底壁部とを一体に有して前記底壁部の中央に
ボス貫通孔が形成されたカップ状のヨークと、前記ヨー
クの周壁部の外径よりも大きな外径を有するように形成
されて前記ヨークの底壁部の外面に当接された円盤状の
鍔板部と該鍔板部の中央から片側に突出して軸線方向に
伸びるように形成されて前記ヨークのボス貫通孔を貫通
した状態で前記ヨーク内に挿入されたボス部とを一体に
有するボス部材とからなっていて、前記ボス部材の鍔板
部が前記ヨークの底壁部にリベットにより締結されたフ
ライホイールと、 前記フライホイールのヨークの周壁部の内周に固定され
た永久磁石とを備え、 前記ヨークの周壁部と底壁部との境界部には前記ボス部
材の鍔板部の外周側に向うに従って該鍔板部から離れる
ようにアールがつけられたコーナ部が形成されているフ
ライホイール磁石回転子において、 前記ボス部材の鍔板部の外周寄りの部分に前記ヨーク側
に突出した環状の突出壁が形成され、 前記環状の突出壁は、前記ヨークの周壁部の外径よりも
小さい内径を有するように形成されて、該突出壁の先端
が前記ヨークのコーナ部の前記鍔板部から外れた部分に
当接され、 前記突出壁により前記ヨークのコーナ部と前記鍔板部と
の間に形成された狭間隙が塞がれていることを特徴とす
るフライホイール磁石回転子。1. A cup-shaped yoke integrally having a peripheral wall portion and a bottom wall portion formed at one end side in the axial direction of the peripheral wall portion, and having a boss through hole formed in the center of the bottom wall portion. A disk-shaped collar plate portion formed to have an outer diameter larger than the outer diameter of the peripheral wall portion of the yoke and abutted on the outer surface of the bottom wall portion of the yoke, and one side from the center of the collar plate portion. A boss member integrally formed with a boss portion that is formed to protrude and extend in the axial direction and is inserted into the yoke in a state of penetrating the boss through hole of the yoke. A flywheel whose part is fastened to the bottom wall of the yoke by rivets; and a permanent magnet fixed to the inner circumference of the peripheral wall of the yoke of the flywheel, the peripheral wall of the yoke and the bottom wall of the yoke. At the boundary, follow the outer periphery of the collar plate of the boss member. In a flywheel magnet rotor in which a corner portion having a radius is formed so as to be separated from the collar plate portion, an annular protruding wall protruding toward the yoke side is provided at a portion of the boss member near the outer periphery of the collar plate portion. The annular protruding wall is formed to have an inner diameter smaller than the outer diameter of the peripheral wall portion of the yoke, and the tip of the protruding wall is disengaged from the collar plate portion of the corner portion of the yoke. A flywheel magnet rotor, which is in contact with a portion, and closes a narrow gap formed between the corner portion of the yoke and the collar plate portion by the protruding wall.
と該周壁部の軸線方向の一端側に形成された底壁部とを
一体に有して前記底壁部の中央にボス貫通孔が形成さ
れ、前記周壁部と底壁部との境界部にアールがつけられ
たコーナ部が形成されたカップ状のヨークを製作するヨ
ーク製作工程と、 前記ヨークの周壁部の外径よりも大きな外径を有するよ
うに形成された円盤状の鍔板部と該鍔板部の中央から片
側に突出して軸線方向に伸びるボス部とを一体に有する
ボス部材を製作するボス部材製作工程と、 前記ボス部材のボス部を前記ヨークのボス貫通孔を通し
て前記ヨーク内に挿入して該ボス部材の鍔板部を前記ヨ
ークの底壁部の外面に対向させた状態で、前記ボス部材
の鍔板部を前記ヨークの底壁部にリベット止めすること
により、前記ヨークとボス部材とからなるフライホイー
ルを組立てるフライホイール組立工程と、 前記フライホイールが組立てられた後に、該フライホイ
ールを位置決め固定した状態で、前記ボス部材のボス部
内に前記ヨークの周壁部と中心軸線を共有するテーパ孔
を形成する加工と前記鍔板部の外周を切削して円筒面状
に仕上げる加工とを含む機械加工を行う加工工程と、 前記フライホイールのヨークの周壁部の内周に磁石を取
り付ける磁石取付け工程とを行ってフライホイール磁石
回転子を製造する方法において、前記ボス部材製作工程
でボス部材を形成する際に、前記ボス部材の鍔板部の外
周寄りの部分からボス部と同じ側に突出した環状の突出
壁を、前記ヨークの周壁部の外径よりも小さい内径を持
たせた状態で形成しておき、 前記ボス部材の鍔板部を前記ヨークの底壁部にリベット
止めする際に、前記ボス部材の突出壁を前記ヨークの周
壁部と底壁部との間の境界部に形成されたコーナ部に当
接させて、前記ボス部材の鍔板部をヨークの底壁部に締
結するリベットをかしめる際の力により、前記突出壁の
先端部を径方向の外側に反らせるように変形させて、該
突出壁の先端部をヨークのコーナ部外面に押圧し、、 前記ボス部材の突出壁により、前記ヨークのコーナ部と
前記ボス部材の鍔板部との間に形成された狭間隙を塞い
だ後に、前記加工工程を行うことを特徴とするフライホ
イール磁石回転子の製造方法。2. An iron plate is drawn to integrally form a peripheral wall portion and a bottom wall portion formed on one end side in the axial direction of the peripheral wall portion, and a boss through hole is formed at the center of the bottom wall portion. A yoke forming step of forming a cup-shaped yoke having a rounded corner formed at the boundary between the peripheral wall portion and the bottom wall portion, and an outer diameter larger than the outer diameter of the peripheral wall portion of the yoke. A boss member manufacturing step of manufacturing a boss member integrally having a disk-shaped collar plate portion formed to have a diameter and a boss portion protruding in one direction from the center of the collar plate portion and extending in the axial direction; The boss portion of the boss member is inserted into the yoke through the boss through hole of the yoke, and the collar plate portion of the boss member faces the outer surface of the bottom wall portion of the yoke. By riveting the bottom wall of the yoke, A flywheel assembling step of assembling a flywheel composed of a hub and a boss member; and, after the flywheel is assembled, the flywheel is positioned and fixed, and the boss portion of the boss member has a peripheral wall portion and a center of the yoke. Machining step including machining for forming a tapered hole sharing the axis and machining for finishing the outer circumference of the collar plate portion into a cylindrical surface, and an inner circumference of the peripheral wall portion of the yoke of the flywheel. In a method of manufacturing a flywheel magnet rotor by performing a magnet mounting step of mounting a magnet, in forming a boss member in the boss member manufacturing step, a boss portion is formed from a portion near an outer periphery of a collar plate portion of the boss member. An annular projecting wall projecting on the same side as the outer circumferential wall of the yoke having an inner diameter smaller than the outer diameter of the circumferential wall portion of the yoke. When riveting the portion to the bottom wall portion of the yoke, the protruding wall of the boss member is brought into contact with a corner portion formed at a boundary portion between the peripheral wall portion and the bottom wall portion of the yoke, The tip of the protruding wall is deformed so as to be warped outward in the radial direction by the force when caulking the rivet that fastens the collar plate of the boss member to the bottom wall of the yoke, and the tip of the protruding wall is deformed. After pressing on the outer surface of the corner portion of the yoke, and by closing the narrow gap formed between the corner portion of the yoke and the collar plate portion of the boss member by the protruding wall of the boss member, the processing step is performed. A method for manufacturing a flywheel magnet rotor, which is characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25970697A JP3493971B2 (en) | 1997-09-25 | 1997-09-25 | Flywheel magnet rotor and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25970697A JP3493971B2 (en) | 1997-09-25 | 1997-09-25 | Flywheel magnet rotor and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1198795A JPH1198795A (en) | 1999-04-09 |
| JP3493971B2 true JP3493971B2 (en) | 2004-02-03 |
Family
ID=17337813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25970697A Expired - Fee Related JP3493971B2 (en) | 1997-09-25 | 1997-09-25 | Flywheel magnet rotor and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3493971B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007037353A (en) * | 2005-07-29 | 2007-02-08 | Mitsubishi Electric Corp | Magnet generator |
| JP2007306680A (en) * | 2006-05-10 | 2007-11-22 | Kokusan Denki Co Ltd | Flywheel magnetic rotor for combustion engine |
| JPWO2020202390A1 (en) * | 2019-03-29 | 2020-10-08 | ||
| JP7214577B2 (en) * | 2019-06-18 | 2023-01-30 | 株式会社ミツバ | STARTER GENERATOR AND STARTER GENERATOR MANUFACTURING METHOD |
| US20230361661A1 (en) * | 2020-09-30 | 2023-11-09 | Aichi Steel Corporation | Method for manufacturing field magnet |
-
1997
- 1997-09-25 JP JP25970697A patent/JP3493971B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1198795A (en) | 1999-04-09 |
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