JPH034136Y2 - - Google Patents
Info
- Publication number
- JPH034136Y2 JPH034136Y2 JP1983189793U JP18979383U JPH034136Y2 JP H034136 Y2 JPH034136 Y2 JP H034136Y2 JP 1983189793 U JP1983189793 U JP 1983189793U JP 18979383 U JP18979383 U JP 18979383U JP H034136 Y2 JPH034136 Y2 JP H034136Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- resin
- cylindrical magnet
- rotor
- thermal expansion
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は小型モータ用のロータに関し、使用中
の振れの発生をなくし、また効率のよいモータ
を、安価に得られるようにしたものである。[Detailed description of the invention] (Industrial application field) The invention relates to a rotor for a small motor, which eliminates the occurrence of runout during use, and makes it possible to obtain a highly efficient motor at a low cost. .
（従来技術）
小型モータ用のロータには、円筒磁石を使用し
たものがある。この場合、軸（回転軸、以下同
じ）と円筒磁石の間には、軸と円筒磁石とを位置
決め固定させる中介物を介在させることになる。
この中介物としては、アルミニウムなどの金属
材、あるいは樹脂成形品を用いることが多い。し
かしながら樹脂成形品を使用したものは回転中に
振れが発生し易く、ロータとステータとのエアギ
ヤツプが不均一になり、特に外径が大きいもので
は振れも大きくなりモータの効率が低下する。ま
た、円筒磁石と樹脂との密着度が低下する問題も
ある。一方、アルミニウムを使用したものではロ
ータの慣性も大きくコスト高となるので使用に不
適であつた。(Prior Art) Some rotors for small motors use cylindrical magnets. In this case, an intermediate is interposed between the shaft (rotating shaft, hereinafter the same) and the cylindrical magnet to position and fix the shaft and the cylindrical magnet.
As this intermediate, a metal material such as aluminum or a resin molded product is often used. However, motors using resin molded parts tend to run out during rotation, and the air gap between the rotor and stator becomes uneven. Particularly in motors with a large outer diameter, the runout becomes large and the efficiency of the motor decreases. There is also the problem that the degree of adhesion between the cylindrical magnet and the resin decreases. On the other hand, those using aluminum have large rotor inertia and are expensive, making them unsuitable for use.
（考案の目的）
本考案は従来のものが有する上記問題を解決し
た小型モータ用のロータを提供することを目的と
する。(Object of the invention) An object of the invention is to provide a rotor for a small motor that solves the above-mentioned problems of the conventional rotor.
（考案の構成）
本考案は上記目的を達成するため、円筒磁石
と、該円筒磁石内に介在する熱膨張の小さい金属
からなる環状の中介物と、該中介物に挿通する軸
とを配し、前記円筒磁石と前記中介物との間およ
び前記中介物と前記軸との間に熱膨張の小さい樹
脂を介在させて一体化したことを特徴とする。(Structure of the device) In order to achieve the above object, the present invention includes a cylindrical magnet, an annular intermediate made of a metal with low thermal expansion interposed within the cylindrical magnet, and a shaft inserted through the intermediate. , characterized in that a resin with low thermal expansion is interposed between the cylindrical magnet and the intermediate and between the intermediate and the shaft so that they are integrated.
また。この中介物に切欠きまたは孔を設けて前
記樹脂を入り込ませるようにしても良い。 Also. A notch or a hole may be provided in this intermediate material to allow the resin to enter therein.
（実施例）
次に本考案の一実施例を第１，２図に基づいて
説明すると、１は円筒磁石であつて中心に軸２が
挿通されている。円筒磁石１はフエライト磁石、
あるいはプラスチツクマグネツトであり、軸２は
鉄棒の先端にローレツト３を刻設したものであ
る。円筒磁石１と軸２の間には熱膨張の小さい金
属からなる環状の中介物４が後述する樹脂７によ
つて位置決め固定されている。中介物４はアルミ
ニウム板から成つており、その内外周部に切欠き
５，６を各複数個設けたものである。そして必要
に応じ、これらのほかに小孔を設けてもよい。(Embodiment) Next, an embodiment of the present invention will be described based on FIGS. 1 and 2. Reference numeral 1 denotes a cylindrical magnet, and a shaft 2 is inserted through the center thereof. Cylindrical magnet 1 is a ferrite magnet,
Alternatively, it may be a plastic magnet, and the shaft 2 is an iron rod with a knurl 3 carved into the tip. An annular intermediate 4 made of a metal with low thermal expansion is positioned and fixed between the cylindrical magnet 1 and the shaft 2 by a resin 7, which will be described later. The intermediate 4 is made of an aluminum plate, and has a plurality of notches 5 and 6 provided on its inner and outer circumferences. If necessary, small holes may be provided in addition to these.
円筒磁石１と中介物４との間、および軸３と中
介物４との間には、熱膨張の小さい樹脂７が介在
させてある。この樹脂７は第１図に示すように円
筒磁石１の内側と軸２の外側に環状に設けられ、
これらの間の部分は波形の帯状になつて連絡して
いる。そして樹脂７は切欠き５，６に入り込み、
円筒磁石１と軸２との間に位置ずれが生じないよ
うにして、これらを一体化している。 A resin 7 with low thermal expansion is interposed between the cylindrical magnet 1 and the intermediate 4 and between the shaft 3 and the intermediate 4. As shown in FIG. 1, this resin 7 is provided in an annular shape inside the cylindrical magnet 1 and outside the shaft 2.
The parts between these are interconnected in the form of wavy bands. Then, the resin 7 enters the notches 5 and 6,
The cylindrical magnet 1 and the shaft 2 are integrated so that no misalignment occurs between them.
このように構成したこのロータは、中介物を介
して樹脂によつて一体化しているので、径方向の
樹脂成形による成形収縮が非常に小さくでき、外
径振れが小さくできる。実施例にあつては、外径
40mmのロータにおいて、従来の中介物のないロー
タでは外径振れが0.2mmであるのに対し、中介物
を有する本考案のものでは0.05mmという結果がで
ている。 Since this rotor constructed in this manner is integrated with resin via an intermediate, molding shrinkage due to resin molding in the radial direction can be extremely small, and outer diameter runout can be reduced. In the example, the outer diameter
In a 40 mm rotor, the outer diameter runout of the conventional rotor without an intermediate was 0.2 mm, while the inventive rotor with an intermediate had an outer diameter runout of 0.05 mm.
以上説明した実施例にあつては円筒磁石の内側
と軸の外側をつなぐ部分の樹脂を波形に形成した
が、これは直線状にしてもよい。また中介物のこ
の部分（樹脂でわたりを設けた部分）に小孔を設
け、この小孔により、樹脂が中介物の両側にわた
るようにすれば、一体化がより確実になる。 In the embodiments described above, the resin at the portion connecting the inside of the cylindrical magnet and the outside of the shaft is formed into a wave shape, but it may also be formed into a straight line. Moreover, if a small hole is provided in this part of the intermediate (the part where the resin is provided) and the resin is spread over both sides of the intermediate, the integration becomes more reliable.
（考案の効果）
本考案は以上説明したように構成したものであ
るから、ロータの慣性を小さくすることができ、
振れも小さくすることができるので、ロータとス
テータとのエアギヤツプを小さくでき、磁気効率
が上り、モータの効率が30％程度向上する効果が
ある。また従来のアルミボスと磁石とを接着した
ものに比し、コストが30％程度になる。(Effects of the invention) Since the invention is configured as explained above, the inertia of the rotor can be reduced,
Since runout can also be reduced, the air gap between the rotor and stator can be reduced, increasing magnetic efficiency and improving motor efficiency by about 30%. Also, the cost is about 30% compared to the conventional one in which an aluminum boss and a magnet are glued together.
第１図は本考案の一実施例の正面図、第２図は
第１図の−線に沿つた断面図である。
１……円筒磁石、２……軸、４……中介物、
５，６……切欠き、７……樹脂。
FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1... Cylindrical magnet, 2... Shaft, 4... Intermediate,
5, 6...notch, 7...resin.
Claims (1)
の小さい金属からなる環状の中介物と、該中介
物に挿通する軸とを配し、前記円筒磁石と前記
中介物との間および前記中介物と前記軸との間
に熱膨張の小さい樹脂を介在させて一体化した
ことを特徴とする小型モータ用のロータ。 (2) 中介物に切欠きまたは孔を設け、該切欠きま
たは孔に前記樹脂を入り込ませたことを特徴と
する実用新案登録請求の範囲第１項記載の小型
モータ用のロータ。[Claims for Utility Model Registration] (1) A cylindrical magnet comprising: a cylindrical magnet; an annular intermediate made of a metal with low thermal expansion interposed within the cylindrical magnet; and a shaft inserted through the intermediate; 1. A rotor for a small motor, characterized in that the rotor is integrated with the intermediate and the intermediate and the shaft with a resin having low thermal expansion interposed between the intermediate and the shaft. (2) A rotor for a small motor according to claim 1, which is a registered utility model, characterized in that a cutout or hole is provided in the intermediate material, and the resin is inserted into the cutout or hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18979383U JPS6096961U (en) | 1983-12-08 | 1983-12-08 | Rotor for small motors |
| GB08422267A GB2151084B (en) | 1983-12-08 | 1984-09-04 | Rotor for use in an electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18979383U JPS6096961U (en) | 1983-12-08 | 1983-12-08 | Rotor for small motors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6096961U JPS6096961U (en) | 1985-07-02 |
| JPH034136Y2 true JPH034136Y2 (en) | 1991-02-01 |
Family
ID=16247297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18979383U Granted JPS6096961U (en) | 1983-12-08 | 1983-12-08 | Rotor for small motors |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6096961U (en) |
| GB (1) | GB2151084B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3611609C1 (en) * | 1986-04-07 | 1987-03-12 | Geda Dechentreiter Maschb Gmbh | Brake motor |
| JPH0638414A (en) * | 1992-07-14 | 1994-02-10 | Daido Steel Co Ltd | Rotor with ring-shaped magnet |
| DE202005017833U1 (en) * | 2005-11-16 | 2007-03-29 | Sinnotec Entwicklungsgesellschaft Ltd. | Closed backing- or cooking chamber for thermal device`s e.g. baking device, has air circulating device driven by electric drive, where drive is provided with two permanent magnets with preset energy density |
| ES2377665T3 (en) * | 2007-08-16 | 2012-03-29 | Young-Chun Jeung | Brushless DC motor rotor |
| US8766502B2 (en) * | 2011-09-27 | 2014-07-01 | Lg Innotek Co., Ltd. | Rotor having shaft slip inhibition structure and motor having the same |
| JP2019506128A (en) | 2016-02-19 | 2019-02-28 | ムーグ インコーポレーテッド | Electric motor rotor assembly |
| CN108134466A (en) * | 2017-12-29 | 2018-06-08 | 成都银河磁体股份有限公司 | Nonlinear type gusset magnet rotor component |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1009827A (en) * | 1963-10-09 | 1965-11-10 | Sanyo Electric Co | Dynamo-electric machine ferrite core rotors |
| US3531670A (en) * | 1968-09-16 | 1970-09-29 | Bendix Corp | Rotary electrical apparatus having metallic sleeve for embracing the peripheral sections of permanent magnet rotor |
| JPS5286620U (en) * | 1975-12-25 | 1977-06-28 | ||
| US4060745A (en) * | 1976-03-25 | 1977-11-29 | Sundstrand Corporation | Structure for attaching a permanent magnet to a rotating shaft |
| JPS541809A (en) * | 1977-06-07 | 1979-01-09 | Citizen Watch Co Ltd | Rotor magnetic and its manufacture |
| GB2035715A (en) * | 1978-11-23 | 1980-06-18 | Waurick & Ass B G | Asynchronous electrical machines and rotors therefor |
| JPS55143675U (en) * | 1979-03-30 | 1980-10-15 | ||
| JPS5698349A (en) * | 1980-01-07 | 1981-08-07 | Hitachi Ltd | Rotor of rotary electric machine and manufacture thereof |
| JPS57180341A (en) * | 1981-04-30 | 1982-11-06 | Japan Servo Co Ltd | Rotor |
| US4427911A (en) * | 1982-01-04 | 1984-01-24 | Imc Magnetics Corp. | Rotor for a stepper motor having a sheet metal support for the magnet |
| AT376849B (en) * | 1982-09-15 | 1985-01-10 | Philips Nv | ELECTRIC MOTOR |
-
1983
- 1983-12-08 JP JP18979383U patent/JPS6096961U/en active Granted
-
1984
- 1984-09-04 GB GB08422267A patent/GB2151084B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB8422267D0 (en) | 1984-10-10 |
| GB2151084A (en) | 1985-07-10 |
| JPS6096961U (en) | 1985-07-02 |
| GB2151084B (en) | 1986-12-31 |
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