JP2651914B2 - Magnet generator rotor - Google Patents
Magnet generator rotorInfo
- Publication number
- JP2651914B2 JP2651914B2 JP62323657A JP32365787A JP2651914B2 JP 2651914 B2 JP2651914 B2 JP 2651914B2 JP 62323657 A JP62323657 A JP 62323657A JP 32365787 A JP32365787 A JP 32365787A JP 2651914 B2 JP2651914 B2 JP 2651914B2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- magnet
- magnet piece
- piece
- partition
- 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 Field Magnets Of Synchronous Machinery (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は小型エンジンに用いられる磁石式発電機に
好適な回転子に関するもので、特にクランク軸に取付け
られるカップ形のヨークの内面に偶数個の永久磁石片を
固定する際の位置決め構造に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor suitable for a magnetic generator used in a small engine, and in particular, an even number of rotors on a cup-shaped yoke attached to a crankshaft. The present invention relates to a positioning structure for fixing a permanent magnet piece.
従来、カツプ形のヨークの内周面に永久磁石の磁石片
をホルダーによつて位置決めし、それらの内面をカツプ
形の金属製内蓋で固定したものが知られている。（例え
ば、特開昭56-56158号公報）。2. Description of the Related Art Conventionally, there has been known a magnet in which permanent magnet pieces are positioned on an inner peripheral surface of a cup-shaped yoke by a holder, and the inner surfaces thereof are fixed with a cup-shaped metal inner lid. (For example, JP-A-56-56158).
しかしながら、このような固定方法を採用するとき、
磁石片の寸法精度が劣るとホルダーと磁石との間の隙間
の大きさが変動し、必然的に磁石の位置決め精度が低下
して出力電力に交流波形の歪みを生じたり、ヨークの回
転バランスが悪化するので、これを防止するためにバラ
ンス工程を要するなど、生産性向上の妨げとなつてい
た。However, when adopting such a fixing method,
If the dimensional accuracy of the magnet pieces is inferior, the size of the gap between the holder and the magnet will fluctuate, inevitably lowering the positioning accuracy of the magnets, causing distortion of the AC waveform in the output power and the rotational balance of the yoke. As a result, the balance process is required to prevent this, and this hinders the improvement of productivity.
この発明は上記不具合を解消するため、磁石片の寸法
精度が低下していてもその取付け位置のアンバランスを
可及的に減じることを目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to reduce the imbalance of the mounting position of the magnet pieces as much as possible even if the dimensional accuracy of the magnet pieces is reduced.
本発明に係る磁石発電機の回転子は、カップ形のヨー
クの内面底部に、環状の基部から前記ヨークの軸線方向
に沿ってヨークの開口側へ向けて突出する隔壁部が前記
ヨークの周方向に間隔をおいて複数設けられた合成樹脂
製の位置決め部材を設け、前記隔壁部によって前記ヨー
クの内周側に形成されたスペースにヨークの軸方向から
見て円弧状の磁石片を挿入するとともにこの磁石片の内
周部にカップ状の抑え筒を嵌入させてヨークに固定した
磁石発電機の回転子であって、前記位置決め部材におけ
る磁石片の両側に配置した隔壁部のうち一方の隔壁部
に、前記基部から垂直に延びるとともに磁石片の一方の
側面に対接する垂直面を形成し、他方の隔壁部を、ヨー
クの軸線方向に沿って延びる細柱がヨークの周方向に並
設されるように二又状に形成し、この細柱の突出側端部
に磁石片の他方の側面へ向けて延びるとともに磁石片側
へ向かうにしたがって次第に前記基部側へ向けて傾斜す
る突出片を形成し、磁石片をヨークに装着した状態で前
記突出片が磁石片の前記他方の側面に弾性変形した状態
で圧接する構造としたものである。In the rotor of the magnet generator according to the present invention, the partition wall projecting from the annular base toward the opening side of the yoke along the axial direction of the yoke is provided on the inner bottom surface of the cup-shaped yoke in the circumferential direction of the yoke. A plurality of synthetic resin positioning members are provided at intervals, and arc-shaped magnet pieces viewed from the axial direction of the yoke are inserted into a space formed on the inner peripheral side of the yoke by the partition. A rotor of a magnet generator in which a cup-shaped holding cylinder is fitted into an inner peripheral portion of the magnet piece and fixed to a yoke, wherein one of partition walls arranged on both sides of the magnet piece in the positioning member. A vertical surface extending perpendicularly from the base portion and in contact with one side surface of the magnet piece, and the other partition portion is provided with narrow columns extending along the axial direction of the yoke in the circumferential direction of the yoke. As bifurcated A projecting piece is formed at the projecting side end of the narrow column and extends toward the other side surface of the magnet piece and is gradually inclined toward the base side toward the magnet piece side, and the magnet piece is attached to the yoke. In this state, the projecting piece is pressed against the other side surface of the magnet piece in an elastically deformed state.
磁石片は一方の隔壁部に設けた突出片によつて他方の
隔壁部へ押し付けられるから、磁石片の寸法にバラツキ
があつても一定の位置に位置決めされる。Since the magnet piece is pressed against the other partition part by the protruding piece provided on one partition part, it is positioned at a fixed position even if the dimensions of the magnet pieces vary.
以下、図示の実施例によつてこの発明を説明すると、
図中、１は自動二輪車に用いられる小型発電機であり、
クランク軸２に取付けられた回転磁石３とケース４に支
持された発電コイル５とで構成されている。Hereinafter, the present invention will be described with reference to the illustrated embodiment.
In the figure, 1 is a small generator used for a motorcycle,
It comprises a rotating magnet 3 attached to a crankshaft 2 and a power generating coil 5 supported by a case 4.
回転磁石３はカツプ形の軟鉄製ヨーク６の内面に接着
された永久磁石の磁石片７によつて構成されている。す
なわち、ヨーク６の内面底部に合成樹脂製の環状の位置
決め部材８を緩く圧入し、ピン8aによつて所定の位置に
固定した後、位置決め部材８によつて規定された所定の
スペースＡ内に前記ヨーク６の軸線方向から見て円弧状
をなす略正方形の磁石片７を挿入し、カツプ状の抑え筒
９によつて押圧し、予め外周面に塗布された接着材によ
つて固定したものである。The rotating magnet 3 is constituted by a permanent magnet magnet piece 7 adhered to the inner surface of a cup-shaped soft iron yoke 6. That is, the annular positioning member 8 made of synthetic resin is loosely press-fitted into the bottom of the inner surface of the yoke 6, fixed at a predetermined position by the pin 8 a, and then into a predetermined space A defined by the positioning member 8. A substantially square magnet piece 7 having an arc shape as viewed from the axial direction of the yoke 6 is inserted, pressed by a cap-shaped holding cylinder 9, and fixed by an adhesive applied to the outer peripheral surface in advance. It is.
ここで、位置決め部材８は環状で位置決め用の突子8a
を有する基部8bと、そこから軸方向に突設された複数の
隔壁部8c,8dによつてヨーク６の内周を90°の角度で前
記磁石片７が挿入されるべき４個のスペースＡを設定す
る。すなわち、隔壁部8cと隔壁部8dとの間の前記スペー
スＡに４個の磁石片７が挿入される構造を採っている。
一つの磁石片７の両側に位置付けられた隔壁部8c,8dの
うち一方の隔壁部8cは、第５図に示すように、前記基部
8bから垂直に延びるとともに磁石片７の一方の側面に対
接する垂直面が形成されている。また、他方の隔壁部8d
は、同図に示すように、ヨーク６の軸線方向に沿って延
びる細柱8eがヨーク６の周方向に並設されるように二又
状に形成され、前記細柱8eの先端に周方向に向けて弾性
的に突出する突出片8fが形成されている。この突出片8f
は、細柱8eの先端から磁石片７の他方の側面へ向けて延
びるとともに磁石片７側へ向かうにしたがって次第に基
部8b側へ向けて傾斜するように形成されている。隔壁部
8dを上述したように二又状に形成して突出片8fを設ける
と、この突出片8fは、第５図に示すように磁石片７を装
着した状態で磁石片７の前記他方の側面に弾性変形した
状態で圧接するようになる。このとき、突出片8fが弾性
変形するとともに、前記細柱8eも二つの細柱8eどうしの
間隔が狭くなるように弾性変形する。Here, the positioning member 8 is an annular positioning projection 8a.
A base portion 8b having a plurality of partitions A and a plurality of partition portions 8c and 8d protruding from the base portion 8c to form four spaces A in which the magnet pieces 7 are to be inserted at an angle of 90.degree. Set. That is, a structure is adopted in which four magnet pieces 7 are inserted into the space A between the partition 8c and the partition 8d.
As shown in FIG. 5, one of the partition walls 8c and 8d positioned on both sides of one magnet piece 7
A vertical surface extending vertically from 8b and in contact with one side surface of the magnet piece 7 is formed. Also, the other partition 8d
As shown in the figure, a narrow column 8e extending along the axial direction of the yoke 6 is formed in a bifurcated manner so as to be juxtaposed in the circumferential direction of the yoke 6. A protruding piece 8f elastically protruding toward is formed. This protruding piece 8f
Is formed so as to extend from the distal end of the narrow column 8e toward the other side surface of the magnet piece 7 and to gradually incline toward the base 8b toward the magnet piece 7 side. Partition wall
When the protrusion 8d is formed bifurcated as described above and the protruding piece 8f is provided, the protruding piece 8f is attached to the other side surface of the magnet piece 7 with the magnet piece 7 mounted as shown in FIG. It comes into pressure contact in an elastically deformed state. At this time, the protruding piece 8f is elastically deformed, and the narrow column 8e is also elastically deformed so that the interval between the two narrow columns 8e is reduced.
なお、隔壁部は、第６図に示すように、一個の隔壁部
を二又状とし、その一側のみに突出片8fを設けるように
してもよいことは勿論である。さらには第５図中、二点
鎖線で示すように、基部8bにも弾性的な補助突出片8gを
ヨークの開口方向に向けて突出させ、位置決めに供する
こともできる。As a matter of course, as shown in FIG. 6, one partition may have a bifurcated shape and the protruding piece 8f may be provided only on one side. Further, as shown by a two-dot chain line in FIG. 5, an elastic auxiliary protruding piece 8g can also be protruded toward the opening direction of the yoke on the base 8b for positioning.
この実施例によれば、ヨーク６内に位置決め部材８を
固定し、隔壁部8c,8dによつて区画されたスペースＡに
磁石片７を挿入すれば、隔壁部8dの細柱8eと突出片8fと
が弾性変形し、これらの弾発力によって磁石片７が隔壁
部8cの垂直面に押付けられるようになる。このため、磁
石片７の周方向の位置が決定され、浮動状態となること
がない。According to this embodiment, when the positioning member 8 is fixed in the yoke 6 and the magnet piece 7 is inserted into the space A defined by the partition walls 8c and 8d, the narrow column 8e of the partition wall 8d and the protruding piece are formed. 8f is elastically deformed, and the resilient force causes the magnet piece 7 to be pressed against the vertical surface of the partition wall 8c. For this reason, the position of the magnet piece 7 in the circumferential direction is determined, and the magnet piece 7 does not float.
本発明に係る磁石発電機の回転子は、カップ形のヨー
クの内面底部に、環状の基部から前記ヨークの軸線方向
に沿ってヨークの開口側へ向けて突出する隔壁部が前記
ヨークの周方向に間隔をおいて複数設けられた合成樹脂
製の位置決め部材を設け、前記隔壁部によって前記ヨー
クの内周側に形成されたスペースにヨークの軸方向から
見て円弧状の磁石片を挿入するとともにこの磁石片の内
周部にカップ状の抑え筒を嵌入させてヨークに固定した
磁石発電機の回転子であって、前記位置決め部材におけ
る磁石片の両側に配置した隔壁部のうち一方の隔壁部
に、前記基部から垂直に延びるとともに磁石片の一方の
側面に対接する垂直面を形成し、他方の隔壁部を、ヨー
クの軸線方向に沿って延びる細柱がヨークの周方向に並
設されるように二又状に形成し、この細柱の突出側端部
に磁石片の他方の側面へ向けて延びるとともに磁石片側
へ向かうにしたがって次第に前記基部側へ向けて傾斜す
る突出片を形成し、磁石片をヨークに装着した状態で前
記突出片が磁石片の前記他方の側面に弾性変形した状態
で圧接する構造としたため、二つの隔壁部の間に形成さ
れるスペースに磁石片を挿入することによって、前記細
柱と突出片とが弾性変形し、これらの弾発力によって磁
石片は一方の隔壁部の垂直面に押付けられるようにな
る。In the rotor of the magnet generator according to the present invention, the partition wall projecting from the annular base toward the opening side of the yoke along the axial direction of the yoke is provided on the inner bottom surface of the cup-shaped yoke in the circumferential direction of the yoke. A plurality of synthetic resin positioning members are provided at intervals, and arc-shaped magnet pieces viewed from the axial direction of the yoke are inserted into a space formed on the inner peripheral side of the yoke by the partition. A rotor of a magnet generator in which a cup-shaped holding cylinder is fitted into an inner peripheral portion of the magnet piece and fixed to a yoke, wherein one of partition walls arranged on both sides of the magnet piece in the positioning member. A vertical surface extending perpendicularly from the base portion and in contact with one side surface of the magnet piece, and the other partition portion is provided with narrow columns extending along the axial direction of the yoke in the circumferential direction of the yoke. As bifurcated A projecting piece is formed at the projecting side end of the narrow column and extends toward the other side surface of the magnet piece and is gradually inclined toward the base side toward the magnet piece side, and the magnet piece is attached to the yoke. In a state in which the projecting piece is pressed against the other side surface of the magnet piece in an elastically deformed state, by inserting the magnet piece into a space formed between two partition portions, The protruding pieces are elastically deformed, and the resilient force causes the magnet pieces to be pressed against the vertical surface of one partition.
このとき、磁石片の寸法にばらつきがあったとして
も、このばらつきは細柱および突出片の弾性変形量が変
わることによって解消され、磁石片は前記垂直面を基準
としてヨークの周方向に対して位置決めされる。しか
も、磁石片は垂直面に倣ってヨーク内に挿入されるの
で、ヨークの軸線方向に対して斜めに傾斜した状態で装
着されてしまうことがない。At this time, even if there is a variation in the dimensions of the magnet pieces, this variation is resolved by changing the amount of elastic deformation of the fine column and the protruding piece, and the magnet pieces are moved relative to the circumferential direction of the yoke with respect to the vertical surface. Positioned. Moreover, since the magnet piece is inserted into the yoke following the vertical plane, the magnet piece is not mounted in a state of being inclined with respect to the axial direction of the yoke.
したがって、磁石片の位置が定まるとともに、磁石片
が隔壁部間で移動することがないので、発電機の出力波
形が歪んだり、ヨークの回転バランスがくずれることが
なく、バランス調整の必要性がなくなる。Therefore, the position of the magnet piece is determined, and the magnet piece does not move between the partition walls, so that the output waveform of the generator is not distorted and the rotational balance of the yoke is not lost, eliminating the need for balance adjustment. .
また、他方の隔壁部の細柱の弾発力と突出片の弾発力
の和からなる押圧力をもって磁石片が前記垂直面に押付
けられるから、弾発力を発生する隔壁部として無駄がな
く、限られたヨーク内のスペースを有効に利用すること
ができる。その上、この構造を採ることによって、隔壁
部を大きく弾性変形させることができるから、磁石片の
寸法の許容範囲を大きくとることができる。In addition, since the magnet piece is pressed against the vertical surface with a pressing force that is the sum of the resilience of the fine column and the resilient force of the protruding piece of the other partition, there is no waste as the partition that generates the resilience. The limited space in the yoke can be used effectively. In addition, by adopting this structure, the partition can be largely elastically deformed, so that the allowable range of the size of the magnet piece can be increased.
さらに、磁石片をヨーク内に挿入するときに突出片の
先端のみが磁石片の側面に擦り付けられるから、磁石片
の挿入時に抵抗となる摩擦力が突出片の先端のみに生じ
ることから磁石片の挿入に要する力が小さくてよい。そ
の上、磁石片をヨーク内に単に押込むだけで挿入するこ
とができるから、熟練を要することなく前記挿入作業を
簡単に行うことができる。Furthermore, when the magnet piece is inserted into the yoke, only the tip of the projecting piece is rubbed against the side surface of the magnet piece. The force required for insertion may be small. In addition, since the magnet pieces can be inserted simply by pushing them into the yoke, the above-mentioned insertion work can be easily performed without requiring skill.
図面はこの発明の一実施例を示すもので、第１図は発電
機の正面図、第２図はそのII-II断面図、第３図はその
主要部品を抽出して示す正面図、第４図はそのIV-IV断
面図、第５図はＶ−Ｖ断面図、第６図は他の実施例を示
す第５図相当の断面図である。 ４……回転磁石、６……ヨーク、７……磁石片、８……
位置決め部材、９……抑え筒、8b……環状の基部、8c,8
d……隔壁部、8e……突出片。1 shows an embodiment of the present invention, FIG. 1 is a front view of a generator, FIG. 2 is a sectional view taken along the line II-II of FIG. 4 is a sectional view taken along line IV-IV, FIG. 5 is a sectional view taken along line VV, and FIG. 6 is a sectional view corresponding to FIG. 5 showing another embodiment. 4 ... rotating magnet, 6 ... yoke, 7 ... magnet piece, 8 ...
Positioning member, 9 ... cylinder, 8b ... annular base, 8c, 8
d: Partition wall, 8e: Projecting piece.
Claims (1)
部から前記ヨークの軸線方向に沿ってヨークの開口側へ
向けて突出する隔壁部が前記ヨークの周方向に間隔をお
いて複数設けられた合成樹脂製の位置決め部材を設け、
前記隔壁部によって前記ヨークの内周側に形成されたス
ペースにヨークの軸方向から見て円弧状の磁石片を挿入
するとともにこの磁石片の内周部にカップ状の抑え筒を
嵌入させてヨークに固定した磁石発電機の回転子であっ
て、前記位置決め部材における磁石片の両側に配置した
隔壁部のうち一方の隔壁部に、前記基部から垂直に延び
るとともに磁石片の一方の側面に対接する垂直面を形成
し、他方の隔壁部を、ヨークの軸線方向に沿って延びる
細柱がヨークの周方向に並設されるように二又状に形成
し、この細柱の突出側端部に磁石片の他方の側面へ向け
て延びるとともに磁石片側へ向かうにしたがって次第に
前記基部側へ向けて傾斜する突出片を形成し、磁石片を
ヨークに装着した状態で前記突出片が磁石片の前記他方
の側面に弾性変形した状態で圧接する構造としたことを
特徴とする磁石発電機の回転子。1. A plurality of partition portions projecting from an annular base toward an opening side of a yoke along an axial direction of the yoke at a bottom portion of an inner surface of a cup-shaped yoke at intervals in a circumferential direction of the yoke. Provided positioning member made of synthetic resin,
An arc-shaped magnet piece as viewed from the axial direction of the yoke is inserted into a space formed on the inner peripheral side of the yoke by the partition, and a cup-shaped holding cylinder is fitted into the inner peripheral part of the magnet piece to make the yoke. A rotor of the magnet generator fixed to the partition member, wherein one of the partition portions disposed on both sides of the magnet piece in the positioning member extends vertically from the base and contacts one side surface of the magnet piece. A vertical surface is formed, and the other partition is formed in a bifurcated shape such that fine columns extending along the axial direction of the yoke are arranged side by side in the circumferential direction of the yoke. A projecting piece extending toward the other side surface of the magnet piece and gradually inclined toward the base side toward the magnet piece is formed, and the projecting piece is the other of the magnet pieces in a state where the magnet piece is mounted on the yoke. Elastic deformation on the side of The rotor of the magneto generator which is characterized in that a structure for pressing in a state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62323657A JP2651914B2 (en) | 1987-12-23 | 1987-12-23 | Magnet generator rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62323657A JP2651914B2 (en) | 1987-12-23 | 1987-12-23 | Magnet generator rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01170354A JPH01170354A (en) | 1989-07-05 |
| JP2651914B2 true JP2651914B2 (en) | 1997-09-10 |
Family
ID=18157153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62323657A Expired - Fee Related JP2651914B2 (en) | 1987-12-23 | 1987-12-23 | Magnet generator rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2651914B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3281244B2 (en) * | 1995-12-11 | 2002-05-13 | 株式会社ミツバ | Magnet generator rotor |
| DE69938287T2 (en) | 1999-01-08 | 2009-04-30 | Lg Electronics Inc. | Rotor arrangement for a brushless motor of the external rotor type |
| FR2931089B1 (en) | 2008-05-19 | 2011-10-28 | Eric Gregoire | PROCESS FOR TREATING ORGANIC WASTE, IN PARTICULAR DOMESTIC |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62138044A (en) * | 1985-12-10 | 1987-06-20 | Mitsuba Electric Mfg Co Ltd | Rotor for magneto-generator |
-
1987
- 1987-12-23 JP JP62323657A patent/JP2651914B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01170354A (en) | 1989-07-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |