JPH0297244A - Permanent magnet type rotor - Google Patents
Permanent magnet type rotorInfo
- Publication number
- JPH0297244A JPH0297244A JP63247352A JP24735288A JPH0297244A JP H0297244 A JPH0297244 A JP H0297244A JP 63247352 A JP63247352 A JP 63247352A JP 24735288 A JP24735288 A JP 24735288A JP H0297244 A JPH0297244 A JP H0297244A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- protection cylinder
- outer periphery
- outer circumferential
- rotor
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 210000000569 greater omentum Anatomy 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、永久磁石式ロータに係り、特に生産性および
信頼性の向上に好適な永久磁石式ロータに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a permanent magnet rotor, and particularly to a permanent magnet rotor suitable for improving productivity and reliability.
この種、永久磁石式ロータでは、特開昭５８１９５４６
０号公報に記載のように、永久磁石の脆さをカバーする
ため、永久磁石の外周に帯状金属を巻き付けている。こ
の従来技術からも分かるように、永久磁石式ロータでは
永久磁石をロータの外周に取り（１ける場合は、信頼性
を確保するため、何らかの保護手段により永久磁石を保
護する必要がある。For this type of permanent magnet rotor, Japanese Patent Application Laid-Open No. 5819546
As described in Japanese Patent No. 0, in order to cover the fragility of the permanent magnet, a band-shaped metal is wrapped around the outer periphery of the permanent magnet. As can be seen from this prior art, in a permanent magnet type rotor, permanent magnets are mounted on the outer periphery of the rotor.
永久磁石式ロータに広く使用されているフェライト磁石
および希土類磁石は、硬くて脆い。また、これらの磁石
は焼結方法により製造され、寸法精度を出しにくい問題
がある。Ferrite and rare earth magnets widely used in permanent magnet rotors are hard and brittle. Furthermore, these magnets are manufactured by a sintering method, which makes it difficult to achieve dimensional accuracy.
ところで、従来遠心力の小さな、小出力のモトル、また
は低速回転のモードルにおいては、ヨークの外周に永久
磁石を接着して用いていた。ところが、最近、機械の小
形化を図るへくモードルの小形化、モードルの高速回転
、モードルの損失源を図るため、高出力のモードルにお
いても永久磁石の使用が要求されている。この高出力の
モードルに使用される永久磁石式ロータでは、永久磁石
の耐遠心力保護が必要である。しかし、前記特開昭５８
−１９５４６０号公報に示されている従末技術では、永
久磁石の耐遠心力保護について、その目的は達成される
ものの、生産性について配慮されていない。By the way, conventionally, in a small output mottle with a small centrifugal force, or a low speed rotation modele, a permanent magnet has been bonded to the outer periphery of the yoke. However, recently, the use of permanent magnets has been required even in high-output models in order to reduce the size of machines, increase the speed of rotation of the models, and eliminate sources of loss in the models. The permanent magnet rotor used in this high-power mode requires protection against centrifugal force of the permanent magnet. However, the said Unexamined Patent Publication No. 58
In the prior art disclosed in Japanese Patent No. 195460, although the purpose of protecting permanent magnets against centrifugal force is achieved, no consideration is given to productivity.
本発明の目的は、永久磁石の保護の信頼性および生産性
の高い永久磁石式ロータを提供することにある。An object of the present invention is to provide a permanent magnet rotor with high reliability in protection of permanent magnets and high productivity.
前記目的を達成するため、本発明は永久磁石の外周に、
薄肉非磁性金属製の外周保護円筒を被せ、前記永久磁石
の軸方向の両端部には、非磁性金属製の当て板を設け、
前記外周保護円筒の軸方向の端部と当て板の外周部とを
、直接かしめて結合している。In order to achieve the above object, the present invention provides a permanent magnet with:
A thin non-magnetic metal outer peripheral protection cylinder is covered, and non-magnetic metal backing plates are provided at both ends of the permanent magnet in the axial direction,
The axial end of the outer periphery protection cylinder and the outer periphery of the backing plate are directly caulked and connected.
また、前記目的をより良く達成するため、本発明は前記
当て板の内径をヨークの外径よりも小さく形成し、前記
当て板をヨークの外周に圧入することにより取り例けて
おり、前記永久磁石の外周保護円筒の直径方向と軸方向
のいずれかの方向に波をつけ、この外周保護円筒を永久
磁石の外周に被せたのぢ、前記波を潰した結合構造によ
り、前記外周保護円筒を永久磁石に密着させており、前
記永久磁石を円周方向に複数個に分割し、永久磁石の外
周に外周保護円筒を被せたのち、外周保護円筒を加圧し
、外周保護円筒の肉の一部を永久磁石の分割面に食い込
ませた結合構造により、前記外周保護円筒を永久磁石に
密着させており、前記外周保護円筒と永久磁石間の隙間
、および前記当て板と永久磁石間の隙間に、接着剤、樹
脂、溶融非磁性金属のいずれかを充填しており、さらに
前記永久磁石の軸方向の少なくとも一端部に、機械側の
負荷のアンバランスを吸収するバランスウェイトを設置
している。Furthermore, in order to better achieve the above object, the present invention provides an example in which the inner diameter of the caul plate is formed smaller than the outer diameter of the yoke, and the caul plate is press-fitted to the outer periphery of the yoke. The outer periphery protection cylinder of the magnet is made with waves in either the diametrical direction or the axial direction, and this outer periphery protection cylinder is placed over the outer periphery of the permanent magnet.The combination structure in which the waves are crushed allows the outer periphery protection cylinder to After dividing the permanent magnet into a plurality of pieces in the circumferential direction and covering the outer periphery of the permanent magnet with an outer periphery protection cylinder, the outer periphery protection cylinder is pressurized and a part of the outer periphery protection cylinder is separated. The outer periphery protection cylinder is brought into close contact with the permanent magnet by a coupling structure in which the outer periphery protection cylinder is bitten into the dividing surface of the permanent magnet, and in the gap between the outer periphery protection cylinder and the permanent magnet and the gap between the patch plate and the permanent magnet, It is filled with adhesive, resin, or molten nonmagnetic metal, and a balance weight is installed at least at one end in the axial direction of the permanent magnet to absorb unbalanced loads on the machine side.
本発明では、永久磁石の外周に外周保護円筒を被せ、永
久磁石の軸方向の両端部に当て板を被せ、前記外周保護
円筒と当て板とを結合しているので、これら外周保護円
筒と当て板とにより、永久磁石が破砕しないように強固
に保護することができ、信頼性を向上させることができ
る。In the present invention, the outer periphery of the permanent magnet is covered with the outer periphery protection cylinder, and both ends of the permanent magnet in the axial direction are covered with the backing plates, and the outer periphery protection cylinder and the backing plates are combined. With the plate, the permanent magnet can be strongly protected from being crushed, and reliability can be improved.
しかも、本発明では永久磁石の外周に外周保護円筒を被
せ、永久磁石の軸方向の両端部に当て板を当て、前記外
周保護円筒の軸方向の端部と当て板の外周部とを直接か
しめて結合しているので、永久磁石の保護部材を簡単に
取り付けることができ、生産性を向上させることができ
る。Moreover, in the present invention, the outer periphery of the permanent magnet is covered with an outer periphery protection cylinder, and a patch plate is applied to both axial ends of the permanent magnet, so that the axial end of the outer periphery protection cylinder and the outer periphery of the patch plate are directly connected. Since they are tightly connected, the permanent magnet protection member can be easily attached, and productivity can be improved.
また、本発明では前記当て板の内径をヨークの外径より
も小さく形成し、この当て板をヨークの外周に圧入して
取り付けるようにすれば、当て板をより一層簡単に取り
付けることができる。Further, in the present invention, if the inner diameter of the caul plate is formed smaller than the outer diameter of the yoke and the caul plate is press-fitted onto the outer periphery of the yoke, the caul plate can be attached even more easily.
さらに、本発明では前記外周保護円筒に波をつけ、この
波を潰して外周保護円筒を永久磁石に密着させるように
すれば、永久磁石の寸法精度のばら付を吸収し、かつ永
久磁石を確実に保護することができる。Furthermore, in the present invention, if the outer circumference protection cylinder is made to have waves and the waves are crushed to bring the outer circumference protection cylinder into close contact with the permanent magnet, variations in the dimensional accuracy of the permanent magnets can be absorbed and the permanent magnets can be secured securely. can be protected.
さらにまた、本発明では前記永久磁石を円周方向に複数
個に分割し、外周保護円筒を加圧し、外周保護円筒の肉
の一部を永久磁石の分割面に食い込ませて密着させるよ
うにすれば、外周保護円筒により永久磁石をより一層強
固に保護でき、かつ外周保護円筒をより一層簡単に取り
（Ｊけることができる。Furthermore, in the present invention, the permanent magnet is divided into a plurality of pieces in the circumferential direction, and the outer circumference protection cylinder is pressurized so that a part of the flesh of the outer circumference protection cylinder is bitten into the divided surface of the permanent magnet and brought into close contact. For example, the permanent magnet can be more strongly protected by the outer periphery protection cylinder, and the outer periphery protection cylinder can be removed even more easily.
また、本発明では外周保護円筒と永久磁石間の隙間、お
よび当て板と永久磁石間の隙間に、接着剤、樹脂、溶融
非磁性金属のいずれかを充填すれば、永久磁石の寸法精
度のほら付を容易に吸収でき、かつ永久磁石と外周保護
円筒と当て板との結合により一層強力なものとなし得る
ので、永久磁石の保護をより一層向上させることができ
る。In addition, in the present invention, the dimensional accuracy of the permanent magnet can be improved by filling the gap between the outer circumferential protection cylinder and the permanent magnet and the gap between the backing plate and the permanent magnet with adhesive, resin, or molten nonmagnetic metal. Since the permanent magnet can be easily absorbed by the magnet, and the combination between the permanent magnet, the outer periphery protection cylinder, and the backing plate can be made stronger, the protection of the permanent magnet can be further improved.
さらに、本発明では永久磁石の軸方向の少なくとも一端
部にバランスウェイトを設置し、このバランスウェイト
により機械側の負荷のアンバランスを吸収するようにす
れは、永久磁石式ロータの信頼性をより一層向上させる
ことができ、バランスウェイトをロータ内部に絹み込ん
たことにより、ロータ外部での各部材の凹凸部を少なく
できるので、風切音による騒音を低減することができる
。Furthermore, in the present invention, a balance weight is installed at at least one end in the axial direction of the permanent magnet, and this balance weight absorbs the unbalanced load on the machine side, thereby further improving the reliability of the permanent magnet rotor. By incorporating the balance weight inside the rotor, it is possible to reduce the unevenness of each member on the outside of the rotor, thereby reducing noise caused by wind noise.
以下、本発明の実施例を図面により説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例を示す縦断側面図、第２図は
同正面図である。FIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention, and FIG. 2 is a front view thereof.
これらの図に示す実施例の永久磁石式ロータでは、ヨー
クｌの外周に永久磁石２が配置されている。In the permanent magnet rotor of the embodiment shown in these figures, permanent magnets 2 are arranged around the outer periphery of the yoke l.
前記永久磁石２の外周保護円筒３が被せられ、同永久磁
石２の軸方向の両端部には当て板４か設（プられている
。The permanent magnet 2 is covered with an outer peripheral protection cylinder 3, and a cover plate 4 is provided at both ends of the permanent magnet 2 in the axial direction.
前記外周保護円筒３は、薄肉非磁性金属で製作されてお
り、またこの実施例では軸方向にΩ形の波３ａが連続す
る形状に形成されている。そして、この外周保護円筒３
を永久磁石２の外周に被せたのち、波３ａを潰して永久
磁石２に密着させる結合構造により、外周保護円筒３は
永久磁石２に取り＋１８プられている。The outer periphery protection cylinder 3 is made of a thin non-magnetic metal, and in this embodiment is formed in the shape of continuous Ω-shaped waves 3a in the axial direction. And this outer circumference protection cylinder 3
After covering the outer periphery of the permanent magnet 2, the outer periphery protection cylinder 3 is attached to the permanent magnet 2 by +18 by a coupling structure in which the waves 3a are crushed and brought into close contact with the permanent magnet 2.
前記当て板４は、内径かヨーク１の外径よりも小さく形
成されており、この内径側の端部４ａをヨーク１の外周
部に圧入ざぜて取り付けられている。The abutment plate 4 has an inner diameter smaller than the outer diameter of the yoke 1, and is attached by press-fitting the end 4a on the inner diameter side into the outer circumference of the yoke 1.
前記外周保護円筒３と各当て板４とは、この実施例ては
当て板４を永久磁石２の端部に押し当てたのぢ、外周保
護円筒３の端部３１）を当て板４の外径側の端部４ｂの
外側に折り曲げてかしめた結合構造により、互いに結合
されている。In this embodiment, the outer periphery protection cylinder 3 and each backing plate 4 are formed by pressing the backing plate 4 against the end of the permanent magnet 2, and pressing the end 31) of the outer periphery protection cylinder 3 onto the outside of the backing plate 4. They are coupled to each other by a coupling structure in which the radial end portion 4b is bent outward and caulked.
この実施例の永久磁石式ロータでは、永久磁石２の外周
部は薄肉非磁性金属製の外周保護円筒３により保護され
、永久磁石２の軸方向の両端部は非磁性金属製の当て板
４により保護されている。In the permanent magnet rotor of this embodiment, the outer periphery of the permanent magnet 2 is protected by an outer periphery protection cylinder 3 made of a thin non-magnetic metal, and both ends of the permanent magnet 2 in the axial direction are protected by a backing plate 4 made of a non-magnetic metal. protected.
したがって、永久磁石式ロータが高出力のモードルに使
用された場合であっても、永久磁石２が破砕されること
がなく、仮に破砕されることがあってもその破片が外部
に飛散し、二次障害を起こすような、トラブルな防止す
ることができる。Therefore, even if the permanent magnet rotor is used in a high-output mode, the permanent magnet 2 will not be crushed, and even if it is crushed, the fragments will be scattered outside and the permanent magnet 2 will not be crushed. You can prevent troubles such as the following failures.
また、この実施例では外周保護円筒３に波３ａをつけ、
外周保護円筒３を永久磁石２の外周に被せたのち、波３
ａを潰して外周保護円筒３を永久磁石２に密着させるよ
うにしているので、永久磁石２の寸法精度のばらＩＪを
吸収でき、かつ外周保護円筒３を永久磁石２に強固に取
り付けることができる。In addition, in this embodiment, the outer circumferential protection cylinder 3 is provided with waves 3a,
After covering the outer periphery of the permanent magnet 2 with the outer periphery protection cylinder 3, the wave 3
Since the outer circumference protection cylinder 3 is brought into close contact with the permanent magnet 2 by crushing the outer circumference protection cylinder 3, it is possible to absorb the variation IJ in the dimensional accuracy of the permanent magnet 2, and also to firmly attach the outer circumference protection cylinder 3 to the permanent magnet 2. .
さらに、この実施例では各当て板４をヨーク１の外周部
に圧入して取り付け、また外周保護円筒３の軸方向の端
部と当て板４とを、外周保護円筒３の端部３ｂを当て板
４の外径側の端部４ｂの外側に折り曲げ、かしめて結合
するようにしているので、永久磁石２の保護部材を簡単
にかつ強力に取り付けることができる。Further, in this embodiment, each patch plate 4 is attached by press-fitting to the outer circumference of the yoke 1, and the end portion 3b of the outer circumference protection cylinder 3 is attached to the axial end of the outer circumference protection cylinder 3. Since the outer diameter end portion 4b of the plate 4 is bent outward and crimped to join, the protective member for the permanent magnet 2 can be attached easily and strongly.
次に、第３図は本発明の他の実施例の一半部の縦断側面
図である。Next, FIG. 3 is a longitudinal sectional side view of a half portion of another embodiment of the present invention.
この第３図に示す実施例の永久磁石式ロータでは、永久
磁石２の軸方向の端部にバランスウェイト５が設置され
ている。In the permanent magnet rotor of the embodiment shown in FIG. 3, a balance weight 5 is installed at the end of the permanent magnet 2 in the axial direction.
前記バランスウェイト５は、当て板４により永久磁石２
の端面に押し付けられ、固定されている。The balance weight 5 is attached to the permanent magnet 2 by the backing plate 4.
is pressed and fixed against the end face of the
そして、このバランスウェイト５は機械側の負荷のアン
バランスを吸収するようになっている。This balance weight 5 is designed to absorb the unbalance of the load on the machine side.
また、この実施例では外周保護円筒３と当て板４とは、
外周保護円筒３の軸方向の端部３ｂと、当て板４の外径
側の端部４１〕とをカーリンクした結合構造により結合
されている。In addition, in this embodiment, the outer periphery protection cylinder 3 and the patch plate 4 are
The axial end 3b of the outer circumferential protection cylinder 3 and the outer diameter end 41 of the backing plate 4 are connected by a curl-linked connection structure.
この第３図に示す実施例の他の構成については、前記第
１図、第２図に示す実施例と同様である。The other structure of the embodiment shown in FIG. 3 is the same as that of the embodiment shown in FIGS. 1 and 2.
そして、この第３図に示す実施例の永久磁石式ロータで
は、永久磁石２と当て板との間に設置されたバランスウ
ェスト５により機械側の負荷のアンバランスを吸収する
ことができる外、バランスウェイト５を永久磁石式ロー
タの内部に刊み込んているのて、ロータ外部での各部材
の凹凸部を少なくすることができ、その結果風切音によ
る騒音を低減することかできる。In the permanent magnet rotor of the embodiment shown in FIG. 3, the balance waist 5 installed between the permanent magnet 2 and the backing plate can absorb the unbalance of the load on the machine side. Since the weight 5 is placed inside the permanent magnet rotor, the unevenness of each member on the outside of the rotor can be reduced, and as a result, noise caused by wind noise can be reduced.
なお、前記バランスウェイト５を永久磁石２の軸方向の
一端部に取り付のでも、両端部に取り付けてもよい。Note that the balance weight 5 may be attached to one end of the permanent magnet 2 in the axial direction, or may be attached to both ends.
また、前記バランスウェイト５を当て板４と一体に形成
すれは、より−Ｎ簡単に取り付けることができる。Furthermore, if the balance weight 5 is formed integrally with the backing plate 4, it can be attached more easily.
なお、この第３図に示す実施例の他の作用については、
前記第１図、第２図に示す実施例と同様である。Regarding other effects of the embodiment shown in FIG. 3,
This is similar to the embodiment shown in FIGS. 1 and 2 above.
そして、本発明では前記第１図および第２図、第３図に
示す実施例の外に、次のように構成してもよい。In addition to the embodiments shown in FIGS. 1, 2, and 3, the present invention may be constructed as follows.
すなわち、永久磁石２を円周方向に複数個に分割し、こ
の永久磁石２の外周に外周保護円筒３を被せたのち、外
周保護円筒３を加圧し、外周保護円筒３の肉の一部を永
久磁石２の分割面に食い込ませた結合構造により、外周
保護円筒３を永久磁石２に密着させるようにしてもよい
。このようにすれば、外周保護円筒３により永久磁石２
をより一層強固に保護できる外、外周保護円筒３をより
一層簡単に取り付けることができる。That is, after dividing the permanent magnet 2 into a plurality of pieces in the circumferential direction and covering the outer periphery of the permanent magnet 2 with the outer periphery protection cylinder 3, the outer periphery protection cylinder 3 is pressurized to partially remove the flesh of the outer periphery protection cylinder 3. The outer circumferential protection cylinder 3 may be brought into close contact with the permanent magnet 2 by a coupling structure that bites into the dividing surface of the permanent magnet 2. In this way, the permanent magnet 2 is protected by the outer circumferential protection cylinder 3.
Not only can the outer periphery protection cylinder 3 be more strongly protected, but also the outer periphery protection cylinder 3 can be attached more easily.
また、外周保護円筒３と永久磁石２間の隙間、および当
て板４と永久磁石２間の隙間に、接む剤樹脂、溶融非磁
性金属のいずれかを充填してもよい。このようにすれば
、永久磁石２の寸法精度のバランスウェイト付を容易に
吸収でき、かつ永久磁石２と外周保護円筒３と当て板４
とをより一層強力に結合することができる。Further, the gap between the outer circumferential protection cylinder 3 and the permanent magnet 2 and the gap between the cover plate 4 and the permanent magnet 2 may be filled with either a contacting agent resin or a molten nonmagnetic metal. In this way, the dimensional accuracy of the permanent magnet 2 with the balance weight can be easily absorbed, and the permanent magnet 2, the outer circumferential protection cylinder 3, and the backing plate 4 can be easily accommodated.
can be combined even more strongly.
なお、外周保護円筒３につける波３ａは、外周保護円筒
３の円周方向に連続するもの、または軸方向に連続する
もののいずれてもよい。Note that the waves 3a applied to the outer circumference protection cylinder 3 may be continuous in the circumferential direction of the outer circumference protection cylinder 3 or may be continuous in the axial direction.
以上説明した本発明の請求項１記載の発明によれは、永
久磁石の外周に外周保護円筒を被せ、永久磁石の軸方向
の両端部に当て板を設け、前記外周保護円筒と当て板と
を結合しているので、これら外周保護円筒と当て板とに
より、永久磁石が破砕しないように強固に保護すること
かでき、信頼性を向上させ得る効果を有する外、永久磁
石の外周に外周保護円筒を被せ、永久磁石の軸方向の両
端部に当て板を当て、前記外周保護円筒の軸方向の端部
と当て板の外周部とを直接かしめて結合しているので、
永久磁石の保護部材を簡単に取り付けることかでき、生
°産性を向上さぜ得る効果がある。According to the invention described in claim 1 of the present invention described above, an outer periphery protection cylinder is placed on the outer periphery of the permanent magnet, a patch plate is provided at both ends of the permanent magnet in the axial direction, and the outer periphery protection cylinder and the patch plate are provided. Since the outer circumference protection cylinder and the backing plate are connected together, the permanent magnet can be strongly protected from being crushed by the outer circumference protection cylinder and the backing plate, which has the effect of improving reliability. , a patch plate is placed on both axial ends of the permanent magnet, and the axial end of the outer circumference protection cylinder and the outer circumference of the patch plate are directly caulked and connected.
The permanent magnet protection member can be easily attached, which has the effect of improving productivity.
第１図は本発明の一実施例を示す縦断側面図、第２図は
同正面図、第３図は本発明の他の実施例の一半部の縦断
側面図である。
１・・・ヨーク、２・・・永久磁石、３・・・外周保護
円筒、３ａ・・外周保護円筒の波、３１）・・・同しく
軸方向の端部、４・・・当て板、４ａ・・・当て板の内
径の端部、４ｂ・・・当て板の外径側の端部、５・・・
バランスウェイト。
代理人 弁理士 小川 勝馬・Ｊべ
／−・ヨーク
２−・−永久磁石
３− クト周仔側隻円筒
４・・揚マ坂
ｊ−ツマうソスウユδトFIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a longitudinal sectional side view of a half portion of another embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Yoke, 2...Permanent magnet, 3...Outer circumference protection cylinder, 3a...Wave of outer circumference protection cylinder, 31)...Same axial end, 4...Backing plate, 4a... Inner diameter end of the backing plate, 4b... Outer diameter end of the backing plate, 5...
balance weight. Agent Patent Attorney Katsuma Ogawa J-Yoke 2--Permanent magnet 3-Cutting Shutai side cylinder 4--Yomazaka j-Tsumau Sosuyu δ
Claims (1)
タにおいて、前記永久磁石の外周に、薄肉非磁性金属製
の外周保護円筒を被せ、前記永久磁石の軸方向の両端部
には、非磁性金属製の当て板を設け、前記外周保護円筒
の軸方向の端部と当て板の外周部とを、直接かしめて結
合したことを特徴とする永久磁石式ロータ。1. In a permanent magnet rotor having a permanent magnet on the outer periphery of the yoke, the outer periphery of the permanent magnet is covered with a thin non-magnetic metal outer protection cylinder, and both axial ends of the permanent magnet are covered with a non-magnetic A permanent magnet rotor characterized in that a metal caul plate is provided, and the axial end of the outer circumference protection cylinder and the outer circumferential portion of the caulk plate are directly caulked and connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63247352A JPH0297244A (en) | 1988-10-03 | 1988-10-03 | Permanent magnet type rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63247352A JPH0297244A (en) | 1988-10-03 | 1988-10-03 | Permanent magnet type rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0297244A true JPH0297244A (en) | 1990-04-09 |
Family
ID=17162136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63247352A Pending JPH0297244A (en) | 1988-10-03 | 1988-10-03 | Permanent magnet type rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0297244A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05269958A (en) * | 1992-03-27 | 1993-10-19 | Olympus Optical Co Ltd | Offset printing plate making device |
| US5495658A (en) * | 1993-07-16 | 1996-03-05 | Sanden Corp. | Method of making cylindrical ferromagnetic body and cover assembly for rotor of DC motor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173364A (en) * | 1981-04-20 | 1982-10-25 | Hitachi Ltd | Magnet rotor and assembling method therefor |
| JPS5846856A (en) * | 1981-09-11 | 1983-03-18 | Hitachi Ltd | Permanent magnet rotor |
| JPS6117875U (en) * | 1984-07-05 | 1986-02-01 | 株式会社東芝 | Rotor with permanent magnet |
| JPS61113569U (en) * | 1984-12-25 | 1986-07-18 | ||
| JPS624871U (en) * | 1985-06-25 | 1987-01-13 | ||
| JPS6248169U (en) * | 1985-09-10 | 1987-03-25 | ||
| JPS62166755A (en) * | 1986-01-16 | 1987-07-23 | Sanyo Electric Co Ltd | Rotor with permanent magnet |
| JPS62296752A (en) * | 1986-05-20 | 1987-12-24 | Sanyo Electric Co Ltd | Manufacture of rotor |
| JPS6323543A (en) * | 1986-07-12 | 1988-01-30 | Fanuc Ltd | Structure of permanent magnet field type rotor |
-
1988
- 1988-10-03 JP JP63247352A patent/JPH0297244A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173364A (en) * | 1981-04-20 | 1982-10-25 | Hitachi Ltd | Magnet rotor and assembling method therefor |
| JPS5846856A (en) * | 1981-09-11 | 1983-03-18 | Hitachi Ltd | Permanent magnet rotor |
| JPS6117875U (en) * | 1984-07-05 | 1986-02-01 | 株式会社東芝 | Rotor with permanent magnet |
| JPS61113569U (en) * | 1984-12-25 | 1986-07-18 | ||
| JPS624871U (en) * | 1985-06-25 | 1987-01-13 | ||
| JPS6248169U (en) * | 1985-09-10 | 1987-03-25 | ||
| JPS62166755A (en) * | 1986-01-16 | 1987-07-23 | Sanyo Electric Co Ltd | Rotor with permanent magnet |
| JPS62296752A (en) * | 1986-05-20 | 1987-12-24 | Sanyo Electric Co Ltd | Manufacture of rotor |
| JPS6323543A (en) * | 1986-07-12 | 1988-01-30 | Fanuc Ltd | Structure of permanent magnet field type rotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05269958A (en) * | 1992-03-27 | 1993-10-19 | Olympus Optical Co Ltd | Offset printing plate making device |
| US5495658A (en) * | 1993-07-16 | 1996-03-05 | Sanden Corp. | Method of making cylindrical ferromagnetic body and cover assembly for rotor of DC motor |
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