JPS58112449A - Permanent magnet rotor - Google Patents
Permanent magnet rotorInfo
- Publication number
- JPS58112449A JPS58112449A JP56213465A JP21346581A JPS58112449A JP S58112449 A JPS58112449 A JP S58112449A JP 56213465 A JP56213465 A JP 56213465A JP 21346581 A JP21346581 A JP 21346581A JP S58112449 A JPS58112449 A JP S58112449A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- support
- resin
- rubber layer
- 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.)
- Pending
Links
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
- H02K1/2733—Annular magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は円筒状の永久磁石の内径部に樹脂を射出して支
持体を形成し、円筒状の永久磁石と支持体を一体に固着
した永久磁石回転子の改良に関するもので、円筒状の永
久磁石の割れやクラックの発生を防止することを目的と
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a permanent magnet rotor in which a support is formed by injecting resin into the inner diameter of a cylindrical permanent magnet, and the cylindrical permanent magnet and the support are fixed together. The purpose is to prevent cracks from occurring in cylindrical permanent magnets.
従来この種の永久磁石回転子は、第３図、第４図に示す
ように、円筒状の永久磁石１′の内径部に樹脂を射出し
て支持体２を形成し、この支持体２′に永久磁石１′を
固着して一体としており、第３図に示すものは支持体２
′自体を回転軸ともしたものであり、第４図に示すもの
は、支持体２′の中心に回転軸３′を貫通させた通常の
回転子構造としたものである。しかしこの種の永久磁石
回転子では、円筒状の永久磁石１′の内径部に樹脂を射
出成形する際に永久磁石１′の内径部に内圧が加わり、
寸だ樹脂の熱膨張係数が永久磁石１′より大きいだめ、
高温時には樹脂の膨張による内圧が永久磁石１′の内径
部に加わって、円筒状の永久磁石１′が割れだリクラノ
クが生ずるおそれがあり、！侍に薄肉の円筒状である場
合、それ÷呉が大きかった。Conventionally, in this type of permanent magnet rotor, as shown in FIGS. 3 and 4, a support body 2 is formed by injecting resin onto the inner diameter part of a cylindrical permanent magnet 1', and this support body 2' A permanent magnet 1' is fixed to the support body 2 to form an integral structure, and the one shown in FIG.
' itself also serves as a rotating shaft, and the one shown in FIG. 4 has a normal rotor structure in which a rotating shaft 3' passes through the center of a support 2'. However, in this type of permanent magnet rotor, when resin is injection molded onto the inner diameter of the cylindrical permanent magnet 1', internal pressure is applied to the inner diameter of the permanent magnet 1'.
If the coefficient of thermal expansion of the resin is larger than that of the permanent magnet 1',
At high temperatures, internal pressure due to the expansion of the resin is applied to the inner diameter of the permanent magnet 1', which may cause the cylindrical permanent magnet 1' to crack and cause cracking! If the Samurai had a thin-walled cylindrical shape, it was larger than that divided by Wu.
本発明はこのような難点を改良するもので、以下本発明
をその実施例を示す第１図、第２図を参考に説明する。The present invention is intended to improve these drawbacks, and will be described below with reference to FIGS. 1 and 2, which show embodiments thereof.
１は円筒状の永久磁石で、その内径面に多孔性ゴム層４
を塗布し、硬化し／こ多孔性ゴム層４のさらに内側へ樹
脂を射出して支持体２を形成し、多孔性ゴム層４を介し
て永久磁石１と支持体２を一体に固着したもので、第１
図に示すものは、支持体２自体が回転軸を兼ねる構造で
あり、第２図に示すものは支持体２の中心に回転軸３を
貫通させたものである。このよう庁構造であると、樹脂
を円３ ページ
筒状の永久磁石１の内側へ射出成形する際、永久磁石１
の内径部に内圧が加わっても、その圧力は多孔性ゴム層
４で吸収されて異常な圧力が永久磁石１の内径部に加わ
ることがなく、しだがって円筒状永久磁石の割れやクラ
ンクの発生を防止することができるものである。1 is a cylindrical permanent magnet with a porous rubber layer 4 on its inner diameter surface.
The permanent magnet 1 and the support 2 are fixed together via the porous rubber layer 4, and the resin is injected further inside the porous rubber layer 4 to form the support 2. So, the first
The structure shown in the figure has a structure in which the support body 2 itself also serves as a rotating shaft, and the structure shown in FIG. 2 has a rotating shaft 3 passing through the center of the support body 2. With such a structure, when injection molding resin inside the cylindrical permanent magnet 1, the permanent magnet 1
Even if internal pressure is applied to the inner diameter of the cylindrical permanent magnet 1, the pressure is absorbed by the porous rubber layer 4 and no abnormal pressure is applied to the inner diameter of the permanent magnet 1. Therefore, cracks in the cylindrical permanent magnet or cranking can occur. It is possible to prevent the occurrence of
上記実施例から明らかなように、本発明の永久磁石回転
子は、円筒状の永久磁石の内径部に多孔性ゴム層を介し
て樹脂射出成形による支持体を形成し、この多孔性ゴム
層を介して前記永久磁石と支持体を一体に固着したもの
で、支持体の成形時に生ずる内圧による円筒状の永久磁
石の割れやクラック発生を防止することができ、しだが
って比較的強度の弱い薄肉の円筒状永久磁石や、円筒状
の焼結永久磁石を用いた小型の永久磁石回転子を実用に
供することができる。As is clear from the above examples, the permanent magnet rotor of the present invention has a support formed by resin injection molding on the inner diameter part of a cylindrical permanent magnet with a porous rubber layer interposed therebetween. The above-mentioned permanent magnet and support are fixed together through a magnet, which can prevent the cylindrical permanent magnet from breaking or cracking due to the internal pressure generated during molding of the support, and therefore has relatively low strength. A small permanent magnet rotor using a thin cylindrical permanent magnet or a cylindrical sintered permanent magnet can be put to practical use.
【図面の簡単な説明】
第１図、第２図はそれぞれ本発明の実施例を示す永久磁
石回転子の縦断面図、第３図、第４図はそれぞれ従来の
永久磁石回転子の縦断面図である。
１・・・・・同筒状の永久磁石、２・・・・・支持体、
４・・・・・・多孔性ゴム層。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
１′[Brief Description of the Drawings] Figures 1 and 2 are longitudinal sectional views of a permanent magnet rotor showing an embodiment of the present invention, and Figures 3 and 4 are longitudinal sectional views of a conventional permanent magnet rotor, respectively. It is a diagram. 1... Cylindrical permanent magnet, 2... Support,
4...Porous rubber layer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 1'
Claims (1)
射出成形による支持体を形成し、この多孔性ゴム層を介
して前記永久磁石と支持体を一体に固着した永久磁石回
転子A permanent magnet rotor in which a support is formed by resin injection molding on the inner diameter part of a cylindrical permanent magnet through a porous rubber layer, and the permanent magnet and the support are fixed together through the porous rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56213465A JPS58112449A (en) | 1981-12-25 | 1981-12-25 | Permanent magnet rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56213465A JPS58112449A (en) | 1981-12-25 | 1981-12-25 | Permanent magnet rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58112449A true JPS58112449A (en) | 1983-07-04 |
Family
ID=16639651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56213465A Pending JPS58112449A (en) | 1981-12-25 | 1981-12-25 | Permanent magnet rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58112449A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1156574A3 (en) * | 2000-05-17 | 2004-01-02 | Fujitsu General Limited | Rotor of electric motor and method for manufacturing the same |
| US7239057B2 (en) * | 2003-03-04 | 2007-07-03 | Lg Electronics Inc. | Single phase induction motor |
| WO2009000599A1 (en) * | 2007-06-27 | 2008-12-31 | Robert Bosch Gmbh | Rotor for an electric motor and electrical machine tool having an electric motor and a rotor |
| US20100225192A1 (en) * | 2007-05-11 | 2010-09-09 | Young-Chun Jeung | Printed circuit board and method of manufacturing the same |
| US8004141B2 (en) | 2005-04-29 | 2011-08-23 | Sntech Inc. | Two-phase brushless DC motor |
| US8033007B2 (en) | 2007-05-11 | 2011-10-11 | Sntech, Inc. | Method of making rotor of brushless motor |
| US8080907B2 (en) * | 2007-10-25 | 2011-12-20 | Young-Chun Jeung | Rotor of brushless (BL) motor |
| US8299661B2 (en) * | 2007-05-11 | 2012-10-30 | Sntech Inc. | Rotor of brushless motor |
-
1981
- 1981-12-25 JP JP56213465A patent/JPS58112449A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1156574A3 (en) * | 2000-05-17 | 2004-01-02 | Fujitsu General Limited | Rotor of electric motor and method for manufacturing the same |
| US7239057B2 (en) * | 2003-03-04 | 2007-07-03 | Lg Electronics Inc. | Single phase induction motor |
| US8004141B2 (en) | 2005-04-29 | 2011-08-23 | Sntech Inc. | Two-phase brushless DC motor |
| US20100225192A1 (en) * | 2007-05-11 | 2010-09-09 | Young-Chun Jeung | Printed circuit board and method of manufacturing the same |
| US8033007B2 (en) | 2007-05-11 | 2011-10-11 | Sntech, Inc. | Method of making rotor of brushless motor |
| US8299661B2 (en) * | 2007-05-11 | 2012-10-30 | Sntech Inc. | Rotor of brushless motor |
| US8456043B2 (en) * | 2007-05-11 | 2013-06-04 | Young-Chun Jeung | Rotor of brushless direct current motor having sound absorbing resin portion |
| WO2009000599A1 (en) * | 2007-06-27 | 2008-12-31 | Robert Bosch Gmbh | Rotor for an electric motor and electrical machine tool having an electric motor and a rotor |
| US8080907B2 (en) * | 2007-10-25 | 2011-12-20 | Young-Chun Jeung | Rotor of brushless (BL) motor |
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