JPH0424767Y2 - - Google Patents
Info
- Publication number
- JPH0424767Y2 JPH0424767Y2 JP6385485U JP6385485U JPH0424767Y2 JP H0424767 Y2 JPH0424767 Y2 JP H0424767Y2 JP 6385485 U JP6385485 U JP 6385485U JP 6385485 U JP6385485 U JP 6385485U JP H0424767 Y2 JPH0424767 Y2 JP H0424767Y2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- positioning ring
- permanent magnets
- shaft
- reinforcing wire
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【考案の詳細な説明】
［考案の技術分野］
本考案はシヤフトの外周に永久磁石を配置して
成る永久磁石付回転子に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rotor with permanent magnets having permanent magnets arranged around the outer periphery of a shaft.
［考案の技術的背景］
従来、この種の回転子は、軸方向に複数の位置
決め突起を有する位置決めリングをシヤフトに嵌
着し、この位置決めリングにより永久磁石を位置
決めしてエポキシ樹脂等の接着剤によりシヤフト
に固定する構造が一般的であつた。ところが、こ
のように接着剤により永久磁石を固定する構成で
は、接着面の汚れ度合いや硬化条件等により接着
強度にばらつきが生じ易いため、特に近年の高速
化及び高出力化により永久磁石に作用する遠心力
が極めて大きくなるという事情のもとでは、永久
磁石の固定の信頼性に欠けるという欠点がある。
そこで、例えば、特開昭58−195460号公報に示さ
れるように、シヤフトの外周に接着により固定し
た永久磁石の外周に例えばステンレス線等の非磁
性材製の補強線を多数回巻回して補強する構成が
供されている。[Technical background of the invention] Conventionally, this type of rotor has a positioning ring having a plurality of positioning protrusions in the axial direction fitted onto the shaft, a permanent magnet positioned by this positioning ring, and an adhesive such as epoxy resin applied to the rotor. The most common structure was to fix it to the shaft. However, with this configuration in which permanent magnets are fixed with adhesive, the adhesive strength tends to vary depending on the degree of contamination of the adhesive surface, curing conditions, etc. In particular, with the recent increase in speed and output, the adhesive strength is likely to vary. Under the circumstances where the centrifugal force becomes extremely large, there is a drawback that the fixing of the permanent magnet is unreliable.
Therefore, for example, as shown in Japanese Patent Application Laid-open No. 58-195460, reinforcing wires made of non-magnetic material such as stainless steel wire are wound around the outer circumference of a permanent magnet fixed to the outer circumference of the shaft by many turns. A configuration is provided.
［背景技術の問題点］
しかしながら、永久磁石と位置決めリングとの
間には僅かにしろ軸方向の隙間が形成されること
は避け難いから、上記構成では、補強線の巻回
時、補強線がその隙間に落ち込んで補強線の切断
事故等が生じ易いという欠点があつた。このた
め、従来は、補強線の巻回作業を、補強線が隙間
に落ち込まないように作業者が巻回ピツチ等を調
節しながら行なわねばならず、生産性に劣る上
に、補強の信頼性も十分に向上させ得ないという
問題があつた。[Problems with the Background Art] However, since it is unavoidable that a gap is formed in the axial direction between the permanent magnet and the positioning ring, even if only slightly, in the above configuration, when the reinforcing wire is wound, the reinforcing wire is There was a drawback that the reinforcing wire could easily fall into the gap and cause accidents such as cutting of the reinforcing wire. For this reason, conventionally, when winding the reinforcing wire, the worker had to adjust the winding pitch etc. to prevent the reinforcing wire from falling into the gap, which resulted in poor productivity and poor reinforcement reliability. There was also the problem that it could not be improved sufficiently.
［考案の目的］
本考案の目的は、生産性及び永久磁石固着の信
頼性を併せて向上させることができる永久磁石付
回転子を提供するにある。[Object of the invention] An object of the invention is to provide a rotor with permanent magnets that can improve both productivity and reliability of permanent magnet fixation.
［考案の概要］
本考案は、シヤフトと、このシヤフトの軸周り
に配置される複数個を一組として該シヤフトの軸
方向に一組もしくは複数組配置された永久磁石
と、前記シヤフトの両端側に前記永久磁石を挟む
ようにして嵌着され相互に対向する面側に前記永
久磁石の軸周り方向の位置を決めるための位置決
め突部を有する位置決めリングと、前記永久磁石
が一組ある場合には前記位置決めリングと前記永
久磁石との間の軸方向隙間を覆うように巻回され
もしくは前記永久磁石が複数組ある場合には前記
位置決めリングと前記永久磁石との間の軸方向隙
間および各永久磁石間の軸方向隙間を覆うように
巻回されたテープと、このテープ外面を含んで一
方の位置決めリングおよび永久磁石並びに他方の
位置決めリングの各外面に連ねて巻回された補強
線と、この補強線を被覆するように設けた硬化樹
脂層とを具備して成るものであり、これにて、補
強線の隙間への落ち込みをテープによつて防止す
ると共に、硬化樹脂層により永久磁石の固着強度
を一層高めるようにしたところに特徴を有するも
のである。[Summary of the invention] The invention comprises a shaft, one or more sets of permanent magnets arranged in the axial direction of the shaft, with a plurality of permanent magnets arranged around the axis of the shaft, and permanent magnets arranged on both ends of the shaft. a positioning ring which is fitted to sandwich the permanent magnet and has a positioning protrusion on mutually opposing surfaces for determining the position of the permanent magnet in the circumferential direction; It is wound so as to cover the axial gap between the positioning ring and the permanent magnet, or if there are multiple sets of permanent magnets, the axial gap between the positioning ring and the permanent magnet and between each permanent magnet. A tape wound so as to cover the axial gap of the tape, a reinforcing wire wound around the outer surface of one positioning ring and a permanent magnet, including the outer surface of the tape, and the outer surface of the other positioning ring, and this reinforcing wire. The tape prevents the reinforcing wire from falling into the gap, and the hardened resin layer increases the fixing strength of the permanent magnet. It is characterized by the fact that it is further enhanced.
［考案の実施例］
図面を参照して説明する。１は略中央に径大部
１ａを有するシヤフト、２はこのシヤフト１の両
端側である径大部１ａの各端部に嵌着した非磁性
材製の一対の位置決めリング、３はシヤフト１の
径大部１ａ外周に複数極を構成するように接着し
た複数個の永久磁石である。この永久磁石３は、
シヤフト１の軸周りの複数個を一組として、軸方
向へ３組配置されるようになつている。各位置決
めリング２にあつて相互に対向する面側における
週方向の所定部位には前記永久磁石３の軸周り方
向の位置を決めるための複数個の位置決め突部２
ａがシヤフト１の軸方向に延びるように突設され
ている。永久磁石３は位置決め突部２ａにより周
方向の位置決めがされた状態で、各極毎に軸方向
に３個列設されている。さて、斯かる構成では一
般に、位置決めリング２と永久磁石３との間及び
永久磁石３相互間に僅かながら軸方向の隙間が生
ずることを避けがたい。これは、永久磁石３の接
着時に軸方向の僅かな位置ずれが生ずることを完
全には避けがたいこと、或は、回転機の温度上昇
による熱膨脹を考慮して予め隙間を設けることが
あるためである。そこで、本考案では、第１図及
び第３図に示すように、一方（左方）の位置決め
リング２と左側の永久磁石３との間、左側の永久
磁石３と中間の永久磁石３との間、中間の永久磁
石３と右側の永久磁石３との間、および右側の永
久磁石３と他方（右方）の位置決めリング２との
間の軸方向の隙間を覆うようにテープ４が巻回さ
れている。このテープ４は、例えばポリエステル
テープ、或は綿テープであつて、回転機のエアギ
ヤツプに対して十分薄く例えば0.08mm程度に設定
されている。５は永久磁石３の外周に巻回した補
強線で、これは例えばステンレス、タングステ
ン、モリブデン等の非磁性材製であつて、やはり
回転機のエアギヤツプに対して十分径小な細線で
ある。この補強線５は、例えば機械巻により、テ
ープ５外面を含んで一方の位置決めリング２およ
び各永久磁石３並びに他方の位置決めリング２の
各外面に一連に等ピツチで巻回されたものであ
る。永久磁石３上には、更に補強線５を覆うよう
に、硬化樹脂層６が設けられている。これは、補
強線５の巻回後、樹脂液を塗布して硬化させるこ
とにより形成されたものである。[Example of the invention] This will be explained with reference to the drawings. 1 is a shaft having a large diameter portion 1a approximately in the center; 2 is a pair of positioning rings made of non-magnetic material fitted to each end of the large diameter portion 1a on both ends of the shaft 1; 3 is a shaft 1 having a large diameter portion 1a; A plurality of permanent magnets are bonded to the outer periphery of the large-diameter portion 1a to form a plurality of poles. This permanent magnet 3 is
Three sets are arranged in the axial direction, with a plurality of sets arranged around the axis of the shaft 1 as one set. A plurality of positioning protrusions 2 for determining the position of the permanent magnet 3 in the axial direction are provided at predetermined positions in the horizontal direction on the mutually opposing surfaces of each positioning ring 2.
A is provided to protrude so as to extend in the axial direction of the shaft 1. Three permanent magnets 3 are arranged in a row in the axial direction for each pole, with the positioning projections 2a positioning them in the circumferential direction. Now, in such a configuration, it is generally difficult to avoid the occurrence of slight axial gaps between the positioning ring 2 and the permanent magnets 3 and between the permanent magnets 3. This is because it is impossible to completely avoid a slight positional shift in the axial direction when the permanent magnet 3 is bonded, or because a gap may be provided in advance to take into account thermal expansion due to a rise in the temperature of the rotating machine. It is. Therefore, in the present invention, as shown in FIGS. 1 and 3, between the one (left) positioning ring 2 and the left permanent magnet 3, and between the left permanent magnet 3 and the intermediate permanent magnet 3, The tape 4 is wound so as to cover the axial gaps between the intermediate permanent magnet 3 and the right permanent magnet 3, and between the right permanent magnet 3 and the other (right) positioning ring 2. has been done. This tape 4 is, for example, a polyester tape or a cotton tape, and is set to be sufficiently thin, for example, about 0.08 mm, relative to the air gap of the rotating machine. Reference numeral 5 denotes a reinforcing wire wound around the outer periphery of the permanent magnet 3, which is made of a non-magnetic material such as stainless steel, tungsten, or molybdenum, and is also a fine wire with a diameter sufficiently small for the air gap of the rotating machine. The reinforcing wire 5 is wound, for example, by machine winding, in a series at equal pitches, including the outer surface of the tape 5, around each of the outer surfaces of one positioning ring 2, each permanent magnet 3, and the other positioning ring 2. A cured resin layer 6 is provided on the permanent magnet 3 so as to further cover the reinforcing wire 5. This is formed by applying and curing a resin liquid after winding the reinforcing wire 5.
上記構成によれば、テープ４が永久磁石３と位
置決めリング２との間及び永久磁石３相互間の軸
方向の隙間を覆うように位置しているから、補強
線５の巻回時、その補強線５が隙間に落ち込んで
切断されることがなく従つて補強線５を確実に巻
回することができて永久磁石３のシヤフト１に対
する固着強度を十分に高めることができる。ま
た、このように補強線５の切断の虞がないから、
補強線５を等ピツチで高速巻回する機械巻を採用
することができ、生産性が従来に比べ大きく向上
する。しかも、補強線５を覆うように硬化樹脂層
６が設けられているから、永久磁石３の固着強度
を一層向上させることができる。これにて、回転
機が高速化及び高出力化されるため永久磁石３に
極めて大きな遠心力が作用し且つ激しい温度変化
に晒されるという事情のもとでも、永久磁石３を
接着により固着したことに起因する強度不安を補
つて、永久磁石３の固着強度を確実に高めること
ができひいては永久磁石３の剥離飛散を未然に防
止して信頼性を大幅に向上させることができるの
である。 According to the above configuration, since the tape 4 is positioned so as to cover the axial gap between the permanent magnet 3 and the positioning ring 2 and between the permanent magnets 3, when the reinforcing wire 5 is wound, it is reinforced. Since the wire 5 does not fall into the gap and be cut, the reinforcing wire 5 can be wound reliably, and the strength of fixing the permanent magnet 3 to the shaft 1 can be sufficiently increased. In addition, since there is no risk of the reinforcing wire 5 being cut in this way,
It is possible to employ mechanical winding in which the reinforcing wire 5 is wound at equal pitches and at high speed, and productivity is greatly improved compared to the conventional method. Moreover, since the cured resin layer 6 is provided so as to cover the reinforcing wire 5, the fixing strength of the permanent magnet 3 can be further improved. With this, the permanent magnets 3 can be fixed by adhesive even under the circumstances where extremely large centrifugal force acts on the permanent magnets 3 as rotating machines become faster and have higher outputs and are exposed to severe temperature changes. By compensating for the strength insecurity caused by this, it is possible to reliably increase the fixing strength of the permanent magnet 3, thereby preventing the permanent magnet 3 from peeling off and scattering, and greatly improving reliability.
尚、上記実施例では、１極分を３個の永久磁石
３により構成するようにしたが、本考案はこれに
限られず、１極分を１個の永久磁石により構成し
ても良く、この場合には、軸周りに一組のみの永
久磁石が設けられることになつて永久磁石と位置
決めリングとの間にのみ軸方向の隙間が生ずるこ
とになるから、その部分にのみテープを巻回すれ
ば良い。また、テープは予め粘着剤層或は接着剤
層を形成した粘着性或は接着性のテープであつて
も良い。 In the above embodiment, one pole is made up of three permanent magnets 3, but the present invention is not limited to this, and one pole may be made up of one permanent magnet. In some cases, only one set of permanent magnets is installed around the shaft, creating an axial gap only between the permanent magnet and the positioning ring, so the tape should only be wound around that part. Good. Further, the tape may be an adhesive or adhesive tape on which a pressure-sensitive adhesive layer or an adhesive layer is formed in advance.
［考案の効果］
本考案は以上述べたように、永久磁石に巻回す
る補強線が位置決めリングと永久磁石との間、さ
らには永久磁石相互間の隙間に落ち込んで切断さ
れることをテープにより確実に防止でき、しかも
硬化樹脂層により永久磁石の固着強度を一層向上
させることができるから、生産性を高めながら、
信頼性を大幅に向上させることができるという優
れた効果を奏するものである。[Effects of the invention] As described above, the invention uses tape to prevent the reinforcing wire wound around the permanent magnet from falling into the gap between the positioning ring and the permanent magnet, or even between the permanent magnets and being cut. This can be reliably prevented, and the hardened resin layer can further improve the fixation strength of the permanent magnet, increasing productivity.
This has the excellent effect of significantly improving reliability.
図面は本考案の一実施例を示し、第１図は部分
縦断面図、第２図は全体の斜視図、第３図は部分
拡大斜視図である。
図中、１はシヤフト、２は位置決めリング、３
は永久磁石、４はテープ、５は補強線、６は硬化
樹脂層である。
The drawings show an embodiment of the present invention, in which FIG. 1 is a partial vertical sectional view, FIG. 2 is an overall perspective view, and FIG. 3 is a partial enlarged perspective view. In the figure, 1 is the shaft, 2 is the positioning ring, and 3
4 is a permanent magnet, 4 is a tape, 5 is a reinforcing wire, and 6 is a cured resin layer.
Claims (1)
る複数個を一組として該シヤフトの軸方向に一組
もしくは複数組配置された永久磁石と、前記シヤ
フトの両端側に前記永久磁石を挟むようにして嵌
着され相互に対向する面側に前記永久磁石の軸周
り方向の位置を決めるための位置決め突部を有す
る位置決めリングと、前記永久磁石が一組ある場
合には前記位置決めリングと前記永久磁石との間
の軸方向隙間を覆うように巻回されもしくは前記
永久磁石が複数組ある場合には前記位置決めリン
グと前記永久磁石との間の軸方向隙間および各永
久磁石間の軸方向隙間を覆うように巻回されたテ
ープと、このテープ外面を含んで一方の位置決め
リングおよび永久磁石並びに他方の位置決めリン
グの各外面に連ねて巻回された補強線と、この補
強線を被覆するように設けた硬化樹脂層とを具備
して成る永久磁石付回転子。 a shaft, one or more sets of permanent magnets arranged in the axial direction of the shaft, and the permanent magnets are fitted to both ends of the shaft so as to sandwich the permanent magnets therebetween; a positioning ring having a positioning protrusion on mutually opposing surfaces for determining the position of the permanent magnet in the circumferential direction; and when there is one set of permanent magnets, between the positioning ring and the permanent magnet; or, if there are multiple sets of permanent magnets, the coil is wound so as to cover the axial gap between the positioning ring and the permanent magnets, and the axial gap between each permanent magnet. The spun tape, the reinforcing wire wound around the outer surface of one positioning ring and permanent magnet, and the outer surface of the other positioning ring, including the outer surface of the tape, and the cured resin provided to cover the reinforcing wire. A rotor with a permanent magnet comprising a layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6385485U JPH0424767Y2 (en) | 1985-04-26 | 1985-04-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6385485U JPH0424767Y2 (en) | 1985-04-26 | 1985-04-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61180579U JPS61180579U (en) | 1986-11-11 |
| JPH0424767Y2 true JPH0424767Y2 (en) | 1992-06-11 |
Family
ID=30594394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6385485U Expired JPH0424767Y2 (en) | 1985-04-26 | 1985-04-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0424767Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05161287A (en) * | 1991-11-29 | 1993-06-25 | Fanuc Ltd | Rotor of synchronous apparatus |
| JP7049290B2 (en) * | 2019-05-15 | 2022-04-06 | 本田技研工業株式会社 | Rotating electric rotor |
-
1985
- 1985-04-26 JP JP6385485U patent/JPH0424767Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61180579U (en) | 1986-11-11 |
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