JPH03124238A - Securing device for rotor magnet - Google Patents
Securing device for rotor magnetInfo
- Publication number
- JPH03124238A JPH03124238A JP1261180A JP26118089A JPH03124238A JP H03124238 A JPH03124238 A JP H03124238A JP 1261180 A JP1261180 A JP 1261180A JP 26118089 A JP26118089 A JP 26118089A JP H03124238 A JPH03124238 A JP H03124238A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic body
- retainer
- laminated magnetic
- outer periphery
- magnet
- 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.)
- Pending
Links
- 230000007423 decrease Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 2
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁石界磁式同期電動機における回転子用磁石
の固定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixing device for a rotor magnet in a magnet field type synchronous motor.
磁石界磁式同期電動機においては、回転子用の永久磁石
が焼結成形品のため、磁石の回転速度が増大すると、磁
石に作用する遠心力により磁石自身が割れて剥離が生じ
る場合がある。In a magnet field type synchronous motor, the permanent magnet for the rotor is a sintered molded product, so when the rotational speed of the magnet increases, the centrifugal force acting on the magnet may cause the magnet itself to crack and peel.
従来、この永久磁石の剥離を防止するために第５図ない
し第７図に示す方式が知られている。図中、１０１は回
転軸、１０２は磁性体からなるヨーク、１０３は永久磁
石を示す。Conventionally, methods shown in FIGS. 5 to 7 have been known to prevent this permanent magnet from peeling off. In the figure, 101 is a rotating shaft, 102 is a yoke made of a magnetic material, and 103 is a permanent magnet.
第５図に示す方式は、磁石１０３の外周部にガラス樹脂
テープ１０４を巻き付けて固定し、第６図に示す方式は
、磁石１０３の外周部に非磁性金属線１０５を巻き付け
て接着剤１０６により固定し、第７図に示す方式は、磁
石１０３の外周部に非磁性金属薄板１０７を巻き付けて
押え金具１゜９を介してボルト１０８により固定してい
る。In the method shown in FIG. 5, a glass resin tape 104 is wrapped around the outer periphery of the magnet 103 and fixed, and in the method shown in FIG. In the method shown in FIG. 7, a thin non-magnetic metal plate 107 is wound around the outer periphery of the magnet 103, and the magnet 103 is fixed with a bolt 108 via a presser fitting 1.9.
しかしながら、上記第５図および第６図に示した方式に
おいては、ガラス樹脂テープ１０４或は金属線１０５、
接着剤１０６により磁石１０３を固定しているだけで強
度が不足するため、磁石１０３に作用する遠心力、振動
が増大すると、磁石１０３が剥離する恐れがある。However, in the systems shown in FIGS. 5 and 6 above, the glass resin tape 104 or the metal wire 105,
Just fixing the magnet 103 with the adhesive 106 does not provide enough strength, so if the centrifugal force and vibration acting on the magnet 103 increase, there is a risk that the magnet 103 will peel off.
また、第７図に示した方式においては、シャフトを形成
するヨーク１０２にボルト穴加工が必要で、かつ強度が
低下し、また、珪素鋼板を積層して形成されるヨーク１
０２へのボルト穴加工が困難であり、また、ボルト１０
８の向きが遠心力方向のため振動等によりボルトが緩ん
で飛び出してしまうという問題を生じる。さらに、押え
金具１０９の押付力を均等にするためにポルｌ−１０８
のネジ込み量を同じにしなければ、回転バランスがとれ
ないという問題ををしている。Further, in the method shown in FIG. 7, bolt holes are required to be formed in the yoke 102 that forms the shaft, and the strength is reduced.
It is difficult to drill bolt holes for bolt 10.
Since the direction of the bolt 8 is in the direction of centrifugal force, a problem arises in that the bolt loosens and pops out due to vibration or the like. Furthermore, in order to equalize the pressing force of the presser metal fitting 109,
The problem is that unless the two screws are screwed in the same amount, the rotation cannot be balanced.
本発明の目的は、上記の問題点を解決するものであって
、磁石の剥離を確実に防止し、がっ回転子の回転バラン
スを良好にならしめる回転子用磁石の固定装置を提供す
ることである。An object of the present invention is to solve the above-mentioned problems, and to provide a rotor magnet fixing device that reliably prevents the magnets from peeling off and improves the rotational balance of the rotor. It is.
そのために、本発明の回転子用磁石の固定装置は、回転
軸（２）の外周に固定される積層磁性体（３）と、該積
層磁性体の軸方向両側に配設されるリテーナ（４）と、
前記積層磁性体の外周に配設される永久磁石（６）と、
該永久磁石の外周に配設される固定用無端バンド（７）
と、両端が先端にいくに従い径が小さくなるテーパー部
（８ａ）を宵するテーパーピン（８）とからなり、該テ
ーパーピンを前記リテーナ（４）間に配設し、該リテー
ナを締め付けることにより前記テーパー部（８ａ）に押
付力を発生させテーパーピン（８）により、前記固定用
無端バンド（７）を介して永久磁石（６）を固定するこ
とを特徴とする。For this purpose, the rotor magnet fixing device of the present invention includes a laminated magnetic body (3) fixed to the outer periphery of the rotating shaft (2), and retainers (4) disposed on both sides of the laminated magnetic body in the axial direction. )and,
a permanent magnet (6) disposed around the outer periphery of the laminated magnetic body;
A fixing endless band (7) arranged around the outer periphery of the permanent magnet.
and a taper pin (8) having a tapered portion (8a) whose diameter decreases toward the tip, and by disposing the taper pin between the retainers (4) and tightening the retainer. It is characterized in that a pressing force is generated in the tapered portion (8a) and the permanent magnet (6) is fixed by the taper pin (8) via the endless fixing band (7).
本発明においては、例えば第１図に示すように、テーパ
ーピン（８）の両端は先端にいくに従い径が小さくなる
テーパー部（８ａ）を有しており、前記係合孔（４ａ）
の大きさは、該テーパー部（８ａ）の通過を許す大きさ
となっていて、２枚のリテーナ（４）の係合孔（４ａ）
間にテーパーピン（８）を挿入し、固定ピン（５）を締
め付けると、係合孔（４ａ）とテーパー部（８ａ）の作
用により、テーパーピン（８）が固定用無端バンド（７
）を押付けるため、永久磁石（６）が強個に固定される
ことになる。In the present invention, as shown in FIG. 1, for example, both ends of the taper pin (8) have tapered portions (8a) whose diameter decreases toward the tip, and the engagement hole (4a)
is large enough to allow the tapered portion (8a) to pass through, and the engagement hole (4a) of the two retainers (4)
When the taper pin (8) is inserted between them and the fixing pin (5) is tightened, the taper pin (8) is attached to the fixing endless band (7) by the action of the engagement hole (4a) and the tapered part (8a).
), the permanent magnet (6) is firmly fixed.
したがって、本発明によれば、従来のようにボルトを使
用しないのでボルトの飛び出しがなく、テーパーピンに
より磁石の固定バンドを均一に押し付けるため、回転子
の遠心力が増大しても磁石の剥離を確実に防止し、かつ
、回転子の回転バランスを良好にすることができる。Therefore, according to the present invention, since bolts are not used as in the past, there is no bolt protrusion, and because the tapered pin uniformly presses the fixed band of the magnet, even if the centrifugal force of the rotor increases, the magnet does not come off. This can be reliably prevented and the rotational balance of the rotor can be improved.
なお、上記構成に付加した番号は図面と対比させるため
のものであり、これにより本発明の構成が何ら限定され
るものではない。Note that the numbers added to the above configurations are for comparison with the drawings, and the configurations of the present invention are not limited thereby.
以下、本発明の実施例を図面を参照しつつ説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図（Ａ）は本発明の回転子用磁石の固定装置の１実
施例を示す断面図、同図（Ｂ）は第１図のＢ−Ｂ線に沿
う断面図である。FIG. 1(A) is a sectional view showing one embodiment of the rotor magnet fixing device of the present invention, and FIG. 1(B) is a sectional view taken along line BB in FIG. 1.
図において、回転子１は、回転軸２、積層磁性体３、リ
テーナ４、固定ピン５、永久磁石６、固定用無端バンド
７、テーパーピン８から構成される装置
回転軸２の外周には、多数の珪素鋼板を積層して形成さ
れる積層磁性体３が工大固定されると共に、積層磁性体
３の両側には、リテーナ４が配設され４本の固定ピン５
にて締め付は固定される。In the figure, the rotor 1 is composed of a rotating shaft 2, a laminated magnetic body 3, a retainer 4, a fixed pin 5, a permanent magnet 6, an endless fixing band 7, and a tapered pin 8. A laminated magnetic body 3 formed by laminating a large number of silicon steel plates is fixed to the engineering university, and retainers 4 are provided on both sides of the laminated magnetic body 3, and four fixing pins 5 are attached to the laminated magnetic body 3.
The tightening is fixed with .
一対のリテーナ４の外周近傍には係合孔４ａが形成され
ている。また、積層磁性体３の外周には、４個の永久磁
石６が間隔を置いて配置され、さらに、永久磁石６の外
周には、非磁性金属からなる固定用無端バンド７が設け
られる。Engagement holes 4a are formed near the outer peripheries of the pair of retainers 4. Further, four permanent magnets 6 are arranged at intervals around the outer periphery of the laminated magnetic body 3, and furthermore, an endless fixing band 7 made of non-magnetic metal is provided around the outer periphery of the permanent magnets 6.
テーパーピン８の両端は先端にいくに従い径が小さくな
るテーパー部８ａを有しており、前記係合孔４ａの大き
さは、該テーパー部８ａの通過を許す大きさとなってい
る。そして、２枚のリテーナ４の係合孔４ａ間にテーパ
ーピン８を挿入し、固定ピン５を締め付けると、係合孔
４ａとテーパー部８ａの作用により、テーパーピン８が
固定用無端バンド７を押付けるため、永久磁石６が強個
に固定されることになる。Both ends of the taper pin 8 have a tapered portion 8a whose diameter decreases toward the tip, and the engagement hole 4a is sized to allow the tapered portion 8a to pass through. Then, when the taper pin 8 is inserted between the engagement holes 4a of the two retainers 4 and the fixing pin 5 is tightened, the taper pin 8 engages the fixing endless band 7 due to the action of the engagement hole 4a and the tapered portion 8a. Because of the pressing, the permanent magnet 6 is firmly fixed.
第２図（Ａ）は本発明の回転子用磁石の固定装置の他の
実施例を示す断面図、同図（Ｂ）は第２図におけるＢ部
の斜視図である。なお、第１図の実施例と同一の構成に
ついては、同一番号を付けて説明を省略する。FIG. 2(A) is a sectional view showing another embodiment of the rotor magnet fixing device of the present invention, and FIG. 2(B) is a perspective view of section B in FIG. 2. Components that are the same as those in the embodiment shown in FIG. 1 are given the same reference numerals and their explanations will be omitted.
本実施例においては、リテーナ４に切起片４ｂを形成し
、該切起片４ｂにテーパーピン８の係合孔４ａを設けた
ことを特徴としている。そして、２枚のリテーナ４の係
合孔４ａ間にテーパーピン８を挿入し、固定ピン５を締
め付けると、係合孔４ａとテーパー部８ａの押イ」け作
用に加えて切起片４ｂの弾性ににより、テーパーピン８
が固定用無端バンド７を押（１けるため、永久磁石６が
強個に固定されることになる。This embodiment is characterized in that a cut-and-raised piece 4b is formed on the retainer 4, and an engagement hole 4a for the taper pin 8 is provided in the cut-and-raised piece 4b. Then, when the taper pin 8 is inserted between the engagement holes 4a of the two retainers 4 and the fixing pin 5 is tightened, in addition to the pushing action of the engagement hole 4a and the tapered portion 8a, the cut and raised pieces 4b are Due to elasticity, taper pin 8
Since the endless fixing band 7 is pushed (1), the permanent magnet 6 is firmly fixed.
第３図は本発明の回転子用磁石の固定装置の他の実施例
を示す断面図であり、リテーナ４の外周を内側に曲げて
折曲片４ｃを形成し、固定ピン５を締め付けると、折曲
片４ｃとテーパー部８ａの作用により、テーパーピン８
が固定用無端バンド７を押付け、永久磁石６を強個に固
定するものである。FIG. 3 is a sectional view showing another embodiment of the rotor magnet fixing device of the present invention, in which the outer periphery of the retainer 4 is bent inward to form a bent piece 4c, and the fixing pin 5 is tightened. Due to the action of the bent piece 4c and the tapered portion 8a, the tapered pin 8
presses the fixing endless band 7 and firmly fixes the permanent magnet 6.
第４図は本発明の回転子用磁石の固定装置の他の実施例
を示す断面図であり、第２図の実施例における固定ピン
５の代わりに、回転軸２に螺合されるナツト９を用いて
テーパーピン８を押し付けるようにしている。無論、第
１図、第３図の実施例に適用してもよい。FIG. 4 is a sectional view showing another embodiment of the rotor magnet fixing device of the present invention, in which a nut 9 screwed onto the rotating shaft 2 is used instead of the fixing pin 5 in the embodiment of FIG. is used to press the taper pin 8. Of course, it may also be applied to the embodiments shown in FIGS. 1 and 3.
なお、本発明は上記実施例に限定されるものではなく種
々の変更が可能である。Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made.
例えば、固定用無端バンド７を積層磁性体３に焼きばめ
により固着してもよく、さらに、これを上記各実施例の
ものと組み合わせるようにしてもよい。For example, the fixing endless band 7 may be fixed to the laminated magnetic body 3 by shrink fitting, and furthermore, this may be combined with those of each of the above embodiments.
第１図（Ａ）は本発明の回転子用磁石の固定装置の１実
施例を示す断面図、同図（Ｂ）は第１図のＢ−Ｂ線に沿
う断面図、 第２図（Ａ）は本発明の回転子用磁石の
固定装置の他の実施例を示す断面図、同図（Ｂ）は第２
図におけるＢ部の斜視図、第３図および第４図は本発明
のさらに他の実施例を示す断面図、第５図、第６図およ
び第７図は従来の回転子用磁石の固定装置を示す断面図
である。
２・・・回転軸、３・・・積層磁性体、４・・・リテー
ナ、４ａ・・・係合孔、５・・・固定ピン、６・・・永
久磁石、７・・・固定用無端バンド、８・・・テーパー
ピン、８ａ・・・テーパー部。FIG. 1(A) is a sectional view showing one embodiment of the rotor magnet fixing device of the present invention, FIG. 1(B) is a sectional view taken along line BB in FIG. 1, and FIG. ) is a sectional view showing another embodiment of the rotor magnet fixing device of the present invention, and FIG.
FIGS. 3 and 4 are sectional views showing still other embodiments of the present invention, and FIGS. 5, 6, and 7 are conventional rotor magnet fixing devices. FIG. 2... Rotating shaft, 3... Laminated magnetic material, 4... Retainer, 4a... Engaging hole, 5... Fixing pin, 6... Permanent magnet, 7... Endless fixing Band, 8... Taper pin, 8a... Taper part.
Claims (6)
磁性体の軸方向両側に配設されるリテーナと、前記積層
磁性体の外周に配設される永久磁石と、該永久磁石の外
周に配設される固定用無端バンドと、両端が先端にいく
に従い径が小さくなるテーパー部を有するテーパーピン
とからなり、該テーパーピンを前記リテーナ間に配設し
、該リテーナを締め付けることにより前記テーパー部に
押付力を発生させテーパーピンにより、前記固定用無端
バンドを介して永久磁石を固定することを特徴とする回
転子用磁石の固定装置。(1) A laminated magnetic body fixed to the outer periphery of the rotating shaft, a retainer disposed on both sides of the laminated magnetic body in the axial direction, a permanent magnet disposed on the outer periphery of the laminated magnetic body, and the permanent magnet It consists of an endless band for fixing disposed around the outer periphery of the retainer, and a taper pin having a tapered portion whose diameter decreases as it goes toward the tip, and by disposing the taper pin between the retainers and tightening the retainer. A fixing device for a rotor magnet, characterized in that a pressing force is generated in the tapered portion and the permanent magnet is fixed via the endless fixing band by a taper pin.
孔内に前記テーパー部が挿入されることを特徴とする請
求項１記載の回転子用磁石の固定装置。(2) The rotor magnet fixing device according to claim 1, wherein an engagement hole is formed on the outer periphery of the retainer, and the tapered portion is inserted into the engagement hole.
片に形成された係合孔内に前記テーパー部が挿入される
ことを特徴とする請求項１記載の回転子用磁石の固定装
置。(3) A rotor magnet according to claim 1, wherein a cut and raised piece is formed on the outer periphery of the retainer, and the tapered portion is inserted into an engagement hole formed in the cut and raised piece. Fixation device.
曲片内に前記テーパー部が挿入されることを特徴とする
請求項１記載の回転子用磁石の固定装置。(4) The rotor magnet fixing device according to claim 1, wherein a bent piece is formed on the outer periphery of the retainer, and the tapered portion is inserted into the bent piece.
り締め付けることを特徴とする請求項１ないし請求項４
にいずれか記載の回転子用磁石の固定装置。(5) Claims 1 to 4 characterized in that the laminated magnetic body and the retainer are tightened by a plurality of fixing pins.
A fixing device for a rotor magnet according to any of the above.
ナットにより締め付けることを特徴とする請求項１ない
し請求項４にいずれか記載の回転子用磁石の固定装置。(6) The rotor magnet fixing device according to any one of claims 1 to 4, wherein the laminated magnetic body and the retainer are tightened by a nut screwed onto a rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1261180A JPH03124238A (en) | 1989-10-05 | 1989-10-05 | Securing device for rotor magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1261180A JPH03124238A (en) | 1989-10-05 | 1989-10-05 | Securing device for rotor magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03124238A true JPH03124238A (en) | 1991-05-27 |
Family
ID=17358243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1261180A Pending JPH03124238A (en) | 1989-10-05 | 1989-10-05 | Securing device for rotor magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03124238A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7365466B2 (en) | 2004-12-20 | 2008-04-29 | Danfoss Compressors Gmbh | Rotor for an electrical motor |
| US7612481B2 (en) | 2004-12-20 | 2009-11-03 | Danfoss Compressors Gmbh | Rotor with a cover plate for securing a magnet in the rotor |
| US7619343B2 (en) | 2004-12-20 | 2009-11-17 | Danfoss Compressors Gmbh | Rotor for an electrical motor |
| US7679252B2 (en) * | 2005-04-13 | 2010-03-16 | Aisin Seiki Kabushiki Kaisha | Magnet embedded motor, rotor unit, and method for manufacturing rotor unit |
-
1989
- 1989-10-05 JP JP1261180A patent/JPH03124238A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7365466B2 (en) | 2004-12-20 | 2008-04-29 | Danfoss Compressors Gmbh | Rotor for an electrical motor |
| US7612481B2 (en) | 2004-12-20 | 2009-11-03 | Danfoss Compressors Gmbh | Rotor with a cover plate for securing a magnet in the rotor |
| US7619343B2 (en) | 2004-12-20 | 2009-11-17 | Danfoss Compressors Gmbh | Rotor for an electrical motor |
| US7679252B2 (en) * | 2005-04-13 | 2010-03-16 | Aisin Seiki Kabushiki Kaisha | Magnet embedded motor, rotor unit, and method for manufacturing rotor unit |
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