JPS6235346B2 - - Google Patents
Info
- Publication number
- JPS6235346B2 JPS6235346B2 JP55089147A JP8914780A JPS6235346B2 JP S6235346 B2 JPS6235346 B2 JP S6235346B2 JP 55089147 A JP55089147 A JP 55089147A JP 8914780 A JP8914780 A JP 8914780A JP S6235346 B2 JPS6235346 B2 JP S6235346B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- yoke
- permanent magnets
- magnets
- cylindrical
- 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
Links
- 239000000696 magnetic material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 7
- 230000004907 flux Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
Description
【発明の詳細な説明】
本発明は回転電機用継鉄に係り、特に自動車用
電装品に装着される回転電機用継鉄の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yoke for a rotating electrical machine, and more particularly to an improvement in a yoke for a rotating electrical machine that is attached to an electrical component for an automobile.
自動車用電装品の継鉄例えば磁石発電機の回転
子には、酸化鉄を主原料としたフエライト磁石の
界磁磁極が用いられている。このフエライト磁石
は、組成上から決まる機械的なもろさが問題とさ
れており、そのための保護構造が種々提案されて
いる。また、フエライト磁石は、鋳造磁石に比較
して透磁率が小さく、この性質を利用して１個の
磁石に複数個の磁性をもつように磁化することが
可能であり、このような特徴を利用した回転子も
実用化されている。 Field magnetic poles of ferrite magnets made of iron oxide as the main raw material are used in yokes of automotive electrical equipment, such as rotors of magnet generators. This ferrite magnet has a problem of mechanical fragility determined by its composition, and various protective structures have been proposed for this purpose. In addition, ferrite magnets have lower magnetic permeability than cast magnets, and by taking advantage of this property, it is possible to magnetize one magnet so that it has multiple magnetic properties. Rotators that have been developed have also been put into practical use.
第１図、第２図は従来のこの種発電機の継鉄で
ある回転子の構造図を示す。第１図、第２図にお
いて、１はセンターピースで、内周のテーパ部は
エンジンのクランク軸（図示せず）に嵌着され
る。２は磁性材よりなる有底円筒状（椀状）のフ
ライホイールで、フライホイール２の円筒状部分
の内周に４個のフエライト磁石３が環状に固着し
てある。ところで、従来は、フエライト磁石３
は、合成樹脂製の保護ケース４に収納し、極片５
をネジ６によつて固定するようにしていた。な
お、７は、フライホイール２の底部にセンターピ
ース１のフランジ部８を固定しているリベツトで
ある。 FIGS. 1 and 2 show structural diagrams of a rotor, which is a yoke of a conventional generator of this type. In FIGS. 1 and 2, numeral 1 denotes a center piece, and a tapered portion on the inner circumference is fitted onto a crankshaft (not shown) of an engine. Reference numeral 2 denotes a bottomed cylindrical (bowl-shaped) flywheel made of a magnetic material, and four ferrite magnets 3 are fixed to the inner circumference of the cylindrical portion of the flywheel 2 in an annular shape. By the way, conventionally, ferrite magnet 3
is stored in a protective case 4 made of synthetic resin, and the pole piece 5 is
was fixed with screws 6. Note that 7 is a rivet that fixes the flange portion 8 of the center piece 1 to the bottom of the flywheel 2.
このため、運転中の熱により合成樹脂製の保護
ケース４が劣化して強度が低下したり、また、極
片５をネジ６で固定するようにしているため、フ
ライホイール２、極片５の加工工数が多くなるほ
か、部品点数が増大してコスト的に割高となるな
どの問題もあつた。また、磁石発電機の電気出力
については、磁石３のネジ６の貫通部の逃げが、
磁石３の有効断面積低下の原因となり、さらに、
極片５を厚目の板材としなければならないので、
それが漏洩磁束増加の原因となり、電気出力向上
の妨げになるなどの問題もあつた。 For this reason, the protective case 4 made of synthetic resin deteriorates due to the heat during operation and its strength decreases, and since the pole pieces 5 are fixed with screws 6, the flywheel 2 and pole pieces 5 In addition to increasing the number of processing steps, there were also problems such as an increase in the number of parts, making the cost relatively high. In addition, regarding the electrical output of the magnet generator, the relief of the penetration part of the screw 6 of the magnet 3 is
This causes a decrease in the effective cross-sectional area of the magnet 3, and furthermore,
Since the pole piece 5 must be made of thick plate material,
This caused problems such as an increase in magnetic flux leakage, which hindered improvements in electrical output.
一方、特開昭53−98013号公報にある如く、永
久磁石の内周面に弾性薄板材を全周にわたつて配
置したものも知られている。この発明は不都合は
ないが、薄板端部の処理を異にしている。 On the other hand, as disclosed in Japanese Unexamined Patent Publication No. 53-98013, there is also known a permanent magnet in which a thin elastic plate is disposed on the inner peripheral surface of the permanent magnet over the entire circumference. Although this invention has no disadvantages, it differs in the treatment of the edges of the thin plate.
本発明の目的は、磁石を容易確実に固着できる
回転電機用継鉄を提供することにある。 An object of the present invention is to provide a yoke for a rotating electrical machine that can easily and reliably fix magnets.
本発明の特徴は、磁石の内周に弾性配置される
磁性材の薄板の一方の端部を上記複数個の磁石の
間にそれぞれ設けた任意の隙間の１つに挿入でき
るようにＵ字状に折り曲げて凸部を形成させた保
持体を円筒状に丸めて介在させ、この保持体で上
記それぞれの磁石を内周より外側に押しつけて磁
性材よりなる継鉄の円筒状部分の内周に固着させ
るようにした点にある。 A feature of the present invention is that one end of a thin plate of magnetic material elastically arranged around the inner periphery of the magnet can be inserted into one of the gaps provided between the plurality of magnets. A holding body which is bent to form a convex portion is rolled into a cylindrical shape and interposed therebetween, and this holding body presses each of the above-mentioned magnets outward from the inner circumference to the inner circumference of the cylindrical part of the yoke made of magnetic material. The point is that it is fixed.
以下本発明を第３図ないし第６図に示した実施
例を用いて詳細に説明する。 The present invention will be explained in detail below using the embodiments shown in FIGS. 3 to 6.
第３図は本発明の回転子の一実施例を示す平面
図、第４図は第３図のＡ―Ａ線断面図であり、第
１図、第２図と同一部分は同じ符号を付し、ここ
では説明を省略する。第３図、第４図において
は、センタピース１のフランジ部８には、鉄板を
成形したフライホイール２がリベツト７で固着し
てあるが、このフライホイール２の円筒部内周の
基部には押出し９が複数個設けてある。１０はア
ルミニウム合金板等の非磁性の金属板で製作した
環状保持体で、フエライト磁石３の両側に図示の
ように配置してある。さらに、フライホイール２
の開口端には内側に突出したフライホイール２の
板厚寸法より薄く加工した環状部１１を設け、押
出し９との間で磁石３を間にして環状保持体１０
を狭持し、フライホイール２の円筒部内周に磁石
３を固定してある。１２は円筒保持体を構成する
弾性を有する磁性材薄板で、その端部１２Ａに
は、隣接する磁石間の任意の隙間の１つに挿入で
きるＵ字状の折り曲げ凸部１４を設けてあり、円
筒状に丸めて上記した隙間に他方のＬ字状端部１
２Ｂと共に挿入した状態で介在させてある。この
状態でＬ字状端部１２Ｂの内側面は磁石３の側面
に係止され、Ｕ字状端部１２Ａは外側面を前記Ｌ
字状端部１２Ｂの外側面に係止され、内側面が他
方の磁石３の側面に係止されており、磁石３の内
周を保護するとともに、拡張力を利用して磁石３
を外側に押しつけてフライホイール２の円筒部分
の内周に固定している。１３は環状保持体１０に
押出しにより形成した凸部で磁石３間の間隔を保
つために形成されている。なお、折り曲げ凸部１
４を磁石３間の隙間に挿入したときの、折り曲げ
凸部１４の撓みＤは、
Ｄ＝（Ｈ＋Ｔ）−Ｇ ……(1)
ここに、Ｈ；折り曲げ凸部１３の幅（第５図参
照）
Ｔ；円筒保持体１２の厚さ（第５図参照）
Ｇ；磁石の間の隙間（第６図参照）
となり、撓みＤによる反力Ｐは、
Ｐ＝Ｄ・Ｋ
ここに、Ｋ；円筒保持体１２の弾性係数とな
る。 FIG. 3 is a plan view showing an embodiment of the rotor of the present invention, and FIG. 4 is a sectional view taken along the line A--A in FIG. 3. The same parts as in FIGS. However, the explanation is omitted here. In FIGS. 3 and 4, a flywheel 2 made of a steel plate is fixed to the flange 8 of the centerpiece 1 with rivets 7, but the base of the inner periphery of the cylindrical portion of the flywheel 2 is fixed to the flange 8 of the centerpiece 1. A plurality of numbers 9 are provided. Reference numeral 10 denotes an annular holder made of a non-magnetic metal plate such as an aluminum alloy plate, which is arranged on both sides of the ferrite magnet 3 as shown in the figure. In addition, flywheel 2
An annular portion 11 that is machined to be thinner than the plate thickness of the flywheel 2 that protrudes inward is provided at the open end of the annular holder 10 with a magnet 3 interposed between it and the extrusion 9.
A magnet 3 is fixed to the inner periphery of the cylindrical portion of the flywheel 2. Reference numeral 12 denotes a thin elastic magnetic material plate constituting the cylindrical holder, and its end 12A is provided with a U-shaped bent convex portion 14 that can be inserted into any one of the gaps between adjacent magnets. Roll it into a cylindrical shape and insert the other L-shaped end 1 into the above-mentioned gap.
It is interposed in a state where it is inserted together with 2B. In this state, the inner surface of the L-shaped end 12B is locked to the side surface of the magnet 3, and the U-shaped end 12A is attached to the outer surface of the L-shaped end 12B.
The outer surface of the letter-shaped end portion 12B is locked, and the inner surface is locked to the side surface of the other magnet 3, which protects the inner circumference of the magnet 3 and uses the expansion force to expand the magnet 3.
is pressed outward and fixed to the inner periphery of the cylindrical portion of the flywheel 2. Reference numeral 13 denotes a convex portion formed by extrusion on the annular holder 10 in order to maintain the spacing between the magnets 3. In addition, the bent convex portion 1
4 is inserted into the gap between the magnets 3, the deflection D of the bent convex portion 14 is as follows: D=(H+T)-G...(1) Where, H: Width of the bent convex portion 13 (see Figure 5) ) T: Thickness of the cylindrical holder 12 (see Figure 5) G: Gap between the magnets (see Figure 6) The reaction force P due to the deflection D is P=D・K where, K: Cylinder This is the elastic modulus of the holding body 12.
従つて、円筒保持体１２の端部１２Ａ，１２Ｂ
は磁石間の隙間で、弾性力をもつて係止保持され
ると共に、円筒保持体１２に拡張力が働き、磁石
３を半径方向外側に常時押圧することができる。 Therefore, the ends 12A, 12B of the cylindrical holder 12
is held in place by an elastic force in the gap between the magnets, and an expansion force acts on the cylindrical holder 12 to constantly press the magnet 3 outward in the radial direction.
なお、磁石３の固定をより確実にするため、フ
ライホイール２と磁石３間、磁石３と環状保持体
１０間および磁石３と円筒保持体１２間の接触面
に接着剤を塗布して加熱硬化させ、それぞれの間
を固着させてある。 In order to securely fix the magnet 3, adhesive is applied to the contact surfaces between the flywheel 2 and the magnet 3, between the magnet 3 and the annular holder 10, and between the magnet 3 and the cylindrical holder 12, and then cured by heating. and the space between each is fixed.
以上した本発明の実施例によれば、次のような
利点がある。 The embodiments of the present invention described above have the following advantages.
１ 円筒保持体１２と環状保持体１０とで磁石３
を完全に包囲しているので、衝撃に対する磁石
３の強度を向上させると同時に、磁石３が万一
破損したときに、その破片の飛散を防止するこ
とができる。1 The cylindrical holder 12 and the annular holder 10 form a magnet 3
Since it completely surrounds the magnet 3, it is possible to improve the strength of the magnet 3 against impact, and at the same time, to prevent fragments of the magnet 3 from scattering in the event that the magnet 3 is damaged.
２ 円筒保持体１２の弾性の作用によりそれぞれ
の磁石３を放射状方向に押し拡げ、同時に折り
曲げ凸部１４が磁石３間の隙間で撓みもつの
で、その反力が磁石３に作用し、磁石３を強固
に固着できる。2 Due to the elastic action of the cylindrical holder 12, each magnet 3 is pushed apart in the radial direction, and at the same time, the bent convex portion 14 is bent in the gap between the magnets 3, so the reaction force acts on the magnet 3, causing the magnet 3 to spread out. Can be firmly fixed.
３ 円筒保持体１２は磁性材で、しかも、容易に
磁気飽和するように薄板で構成してあるから、
極間の漏洩磁束が少なく、さらに、磁化した極
の周辺部磁束密度が向上し、磁束分布が回転子
の回転角度に対して急しゆんな変化をもつ角形
特性となり、固定子（図示せず）と組合せたと
きの磁束変化が急しゆんとなり、磁石発電機と
しての電気出力を増大できる。3. The cylindrical holder 12 is made of a magnetic material and is made of a thin plate so as to be easily magnetically saturated.
The magnetic flux leakage between the poles is small, and the magnetic flux density around the magnetized poles is improved, and the magnetic flux distribution has a rectangular characteristic with a sudden and gradual change with respect to the rotation angle of the rotor. ), the magnetic flux changes suddenly and the electric output as a magnet generator can be increased.
４ 従来の磁石３にあつたネジ逃げ用の孔が不用
となり、磁石３の有効断面積が増加し、磁束が
増大して、その分だけ電気出力を増大できる。4. The holes for screw escape in the conventional magnet 3 are no longer required, the effective cross-sectional area of the magnet 3 increases, the magnetic flux increases, and the electrical output can be increased accordingly.
５ 従来の回転子構造に比較し、部品点数が少な
くなり、また、加工工数を低減できる。5. Compared to the conventional rotor structure, the number of parts is reduced and the number of processing steps can be reduced.
以上説明したように、本発明によれば、磁石を
容易確実に固着できる回転電機用継鉄が提供でき
る。 As explained above, according to the present invention, it is possible to provide a yoke for a rotating electric machine to which a magnet can be easily and reliably fixed.
第１図は従来の磁石発電機回転子の一部を断面
した平面図、第２図は第１図の要部縦断面図、第
３図は本発明を用いた回転子の一実施例を示す平
面図、第４図は第３図のＡ−Ａ線断面図、第５図
は第３図の円筒保持体を円筒状にする前の斜視
図、第６図は第３図の磁石の斜視図である。
１…センターピース、２…フライホイール、３
…フエライト磁石、８…フランジ部、９…押出
し、１０…環状保持体、１１…環状部、１２…円
筒保持体、１３…凸部、１４…折り曲げ凸部。
Fig. 1 is a partially sectional plan view of a conventional magnet generator rotor, Fig. 2 is a longitudinal sectional view of the main part of Fig. 1, and Fig. 3 is an embodiment of a rotor using the present invention. FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3, FIG. 5 is a perspective view of the cylindrical holder shown in FIG. 3 before it is made into a cylindrical shape, and FIG. FIG. 1...Center piece, 2...Flywheel, 3
...Ferrite magnet, 8...Flange part, 9...Extrusion, 10...Annular holder, 11...Annular part, 12...Cylindrical holder, 13...Convex part, 14...Bending convex part.
Claims (1)
永久磁石を任意の間隔をもつて環状に配置し、か
つ前記永久磁石の内周側表面全体に弾性を有する
磁性材の薄板を嵌合固定してなる回転電機用継鉄
において、前記薄板材の一端は、前記永久磁石間
の１つに挿入できるようにＵ字状に折り曲げて凸
部が形成され、前記永久磁石間に折り曲げ配置さ
れた薄板材の他端と対接固定されていることを特
徴とした回転電機用継鉄。1 A plurality of permanent magnets are arranged annularly at arbitrary intervals on the inner circumference of a cylindrical yoke made of a magnetic material, and a thin plate of an elastic magnetic material is fitted over the entire inner circumferential surface of the permanent magnets. In a yoke for a rotating electric machine which is fixed together, one end of the thin plate material is bent into a U-shape to form a convex portion so as to be inserted into one of the spaces between the permanent magnets, and the end is bent and arranged between the permanent magnets. A yoke for a rotating electrical machine characterized by being fixed oppositely to the other end of a thin plate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8914780A JPS5716561A (en) | 1980-07-02 | 1980-07-02 | Rotor for magnet generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8914780A JPS5716561A (en) | 1980-07-02 | 1980-07-02 | Rotor for magnet generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5716561A JPS5716561A (en) | 1982-01-28 |
| JPS6235346B2 true JPS6235346B2 (en) | 1987-07-31 |
Family
ID=13962748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8914780A Granted JPS5716561A (en) | 1980-07-02 | 1980-07-02 | Rotor for magnet generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5716561A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57139281U (en) * | 1981-02-24 | 1982-08-31 | ||
| JPS596759A (en) * | 1982-06-30 | 1984-01-13 | Hitachi Ltd | Rotor for magnet generator |
| CA1247686A (en) * | 1984-03-07 | 1988-12-28 | Nobuhiko Ogasawara | Magneto d.c. motor having elastic magnet mounting retainers |
| JPH0695824B2 (en) * | 1985-01-14 | 1994-11-24 | 株式会社日立製作所 | Magnet type DC machine stator |
| US4873461A (en) * | 1988-05-13 | 1989-10-10 | Stryker Corporation | Electric motor sterilizable surgical power tool |
| JP4908994B2 (en) * | 2006-09-26 | 2012-04-04 | トヨタホーム株式会社 | Building with inna garage |
| JP5422019B2 (en) * | 2012-05-16 | 2014-02-19 | 三菱電機株式会社 | Magnet generator |
| CN113067448A (en) * | 2021-05-12 | 2021-07-02 | 安徽乐普电机有限公司 | Direct-current brushless motor rotor and forming method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116784Y2 (en) * | 1979-01-09 | 1986-05-23 |
-
1980
- 1980-07-02 JP JP8914780A patent/JPS5716561A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5716561A (en) | 1982-01-28 |
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