JPH0265636A - Structure for securing rotor and output shaft of radial type synchronous motor - Google Patents
Structure for securing rotor and output shaft of radial type synchronous motorInfo
- Publication number
- JPH0265636A JPH0265636A JP63214935A JP21493588A JPH0265636A JP H0265636 A JPH0265636 A JP H0265636A JP 63214935 A JP63214935 A JP 63214935A JP 21493588 A JP21493588 A JP 21493588A JP H0265636 A JPH0265636 A JP H0265636A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- output shaft
- resin
- synchronous motor
- gap
- 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
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 23
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 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、ロータコアとマグネットとを円周方向に交互
に並設したタイプの、所謂ラジアルタイプのロータを出
力軸に固定する構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for fixing a so-called radial type rotor to an output shaft, in which rotor cores and magnets are arranged alternately in parallel in the circumferential direction.
−aにラジアルタイプのロータを出力軸に固定するには
、該ロータの両端に端板を取り付け、この端板を介して
出力軸に固定している。その方法の1つとして焼ばめが
あり、またピン部材を打ち込んで締結固定する方法もあ
る。更に、ロータを構成するロータコア及びマグネット
等の相対的ガタを防止すべく、含浸材により処理するこ
とが多い。In order to fix the radial type rotor to the output shaft in -a, end plates are attached to both ends of the rotor, and the rotor is fixed to the output shaft via the end plates. One of the methods is shrink fitting, and there is also a method of fastening and fixing by driving a pin member. Furthermore, in order to prevent the relative looseness of the rotor core, magnets, etc. that constitute the rotor, the rotor is often treated with an impregnating material.
然しなから、上記の焼ばめ方法でもビン部材による方法
でも、ロータの端部以外は出力軸と隙間を有しており、
従って何らかの外力による曲げ作用を受けると出力軸は
ロータの内部において曲げが生ずる。また特に軸方向に
長い高出力トルク用のロータの固定に際しては、上記の
焼ばめ方法では信頬性の高い締結が得られない。それは
、断面形状が同じであって、軸方向長さが異なるロータ
においては、当然ながら長いロータの方が出力トルクが
大きいが、そのトルクの伝達を行なう焼ばめ部分は0;
5後2箇所に限られるからである。However, in both the above-mentioned shrink fit method and the method using a bottle member, the parts other than the end of the rotor have a gap with the output shaft.
Therefore, if the output shaft is subjected to a bending action due to some external force, the output shaft will be bent inside the rotor. In addition, particularly when fixing a rotor for high output torque that is long in the axial direction, the above-mentioned shrink fitting method cannot provide a highly reliable fastening. Of course, when rotors have the same cross-sectional shape but different axial lengths, the longer rotor has a larger output torque, but the shrink-fit portion that transmits that torque is 0;
This is because it is limited to two locations after 5.
依って本発明は斯る課題の解決を図るべく、出力軸の曲
がることがないと共に信頼性の高い締結の得られるロー
タと出力軸との固定構造の提供を目的とする。Therefore, in order to solve these problems, the present invention aims to provide a fixing structure between a rotor and an output shaft, which prevents the output shaft from bending and provides highly reliable fastening.
一ト記目的に鑑みて本発明は、ロータコアとマグネット
とを円周方向に交互に並設したタイプの同期式電動機の
ロータう出力軸に固定する構造であって、出力軸の表面
にねじ部分を有し、前記ロータを前記ねじ部分を含む領
域に亘って前記出力軸に挿入し、該ねじ部分を含む領域
と前記ロータの内周面との間隙にモールド用樹脂を充填
したことを特徴とするラジアルタイプの同期電動機ロー
タと出力軸との固定構造を提供する。In view of the above objects, the present invention provides a structure in which a rotor core and magnets are fixed to an output shaft of a rotor of a synchronous electric motor of a type in which rotor cores and magnets are arranged alternately in parallel in the circumferential direction. The rotor is inserted into the output shaft over a region including the threaded portion, and a gap between the region including the threaded portion and the inner peripheral surface of the rotor is filled with molding resin. Provides a fixing structure between a radial type synchronous motor rotor and an output shaft.
ロータの内周面はラジアルタイプのロータの構成上概ね
多角形の形状を成しており、またロータの内周面と対向
した出力軸の表面には旋盤によって容易に形成すること
の可能なねじ部分が形成しであるため、ロータ又は出力
軸と、これらの隙間に充填されたモールド用樹脂とが互
いに滑りを生ずることなく、確実にトルクを伝達するこ
とが可能となる。また充填されたモールド用樹脂の存在
のため、出力軸に何らかの曲げ作用が働いても実際に曲
がることはない。The inner peripheral surface of the rotor has a generally polygonal shape due to the structure of a radial type rotor, and the surface of the output shaft facing the inner peripheral surface of the rotor has a thread that can be easily formed using a lathe. Since the portions are formed, it is possible to reliably transmit torque without causing the rotor or output shaft and the molding resin filled in the gap between them to slip. Furthermore, due to the presence of the filled molding resin, even if some kind of bending action is applied to the output shaft, it will not actually bend.
以下本発明を添付図面に示す実施例に基づいて更に詳細
に説明する。The present invention will be described in more detail below based on embodiments shown in the accompanying drawings.
マグネット14とロータコア16を円周方向に交互に並
設した、所謂ラジアルタイプのロータ12を出力軸10
に固定する方法並びにその固定構造につき説明する。本
実施例ではロータ■2はその軸方向長さが所定値である
4個の単位ロータ12a。The output shaft 10 includes a so-called radial type rotor 12 in which magnets 14 and rotor cores 16 are arranged alternately in parallel in the circumferential direction.
The method and structure for fixing it will be explained below. In this embodiment, the rotors 12 are four unit rotors 12a each having a predetermined length in the axial direction.
12b、12C,及び12dを軸方向に並設して構成し
ている。マグネット14とロータコア16を一体化させ
るためにロータコア■6にはtlJm材18が貫通挿入
されている。こうして4個の単位ロータ12a、12b
、12c、及び12dから構成された比較的長いロータ
12を出力軸10に対して固定するが、該ロータ12の
内周面と出力軸10との間には隙間が存在している。そ
のロータ12の両端に端板26を設け、その内周部を出
力軸10に軽く圧入できる寸法に設定しておく。この端
板26を両端に設けたロータ12を出力軸10に小さな
力で圧入して所定の軸方向位置で止める。この所定位置
の出力軸には、一方の端Fi、26の内周部の外側に位
置する注入口28を有した溝32が設けである。この溝
32はロータ12と出力軸10との間隙にモールド用樹
脂、例えばエポキシ樹脂を流入(場合によっては圧入)
させてその間隙をモールド用樹脂で充填させるための樹
脂液導入溝である。12b, 12C, and 12d are arranged in parallel in the axial direction. In order to integrate the magnet 14 and the rotor core 16, a tlJm material 18 is inserted through the rotor core 6. In this way, four unit rotors 12a, 12b
, 12c, and 12d is fixed to the output shaft 10, but a gap exists between the inner peripheral surface of the rotor 12 and the output shaft 10. End plates 26 are provided at both ends of the rotor 12, and the inner circumferential portion thereof is set to a size that allows it to be lightly press-fitted into the output shaft 10. The rotor 12 with the end plates 26 provided at both ends is press-fitted onto the output shaft 10 with a small force and stopped at a predetermined axial position. The output shaft at this predetermined position is provided with a groove 32 having an inlet 28 located outside the inner circumference of one end Fi, 26. This groove 32 allows molding resin, such as epoxy resin, to flow into the gap between the rotor 12 and the output shaft 10 (in some cases, it may be press-fitted).
This is a resin liquid introduction groove for filling the gap with molding resin.
上記注入口28からモールド用樹脂24を注入してロー
タ12と出力軸10との間隙に充填し、更に注入を続け
るとマグネット14とロータコアI6との隙間からロー
タI20表面に溢れてくる。The molding resin 24 is injected from the injection port 28 to fill the gap between the rotor 12 and the output shaft 10, and when the injection is continued, it overflows onto the surface of the rotor I20 from the gap between the magnet 14 and the rotor core I6.
樹脂24を単に注入するだけでは、第4図に示す如くロ
ータ12の表面に溢れた樹脂22′は部分的に盛り上が
ってしまう。周知の如(ロータはステータとの間に僅か
な間隙を有するのみであり、上記の盛り上がり樹脂はロ
ータの最大外径を超えて盛り上がってはならない。これ
を防止するには、例えば第3図に示す如くロータ12の
外側に円筒状の治具ケース30を被せておけば、溢れた
樹脂22は第2図に示す様にロータ12の最大外径内に
収まる。ロータ12の内周面と出力軸10との間に充填
された樹脂は外部から見えないが、ロータ12の表面に
溢れた樹脂の存在により内部の隙間に樹脂が充填された
ことが確認できる。If the resin 24 is simply injected, the resin 22' overflowing onto the surface of the rotor 12 will partially swell as shown in FIG. As is well known (there is only a small gap between the rotor and the stator, the above-mentioned swollen resin must not swell beyond the maximum outer diameter of the rotor. To prevent this, for example, as shown in Fig. 3) If a cylindrical jig case 30 is placed over the outside of the rotor 12 as shown, the overflowing resin 22 will be contained within the maximum outer diameter of the rotor 12 as shown in FIG. Although the resin filled between the rotor 10 and the shaft 10 is not visible from the outside, it can be confirmed that the internal gap is filled with resin due to the presence of resin overflowing onto the surface of the rotor 12.
この構造に使用する出力軸重0として、ロータ12に挿
入されている部分に亘って第5図に示す様なねじ部11
を旋盤によって形成しておくと、充填されたモールド樹
脂24と該ねじ部11とは互いに係合し合い、ロータ1
2に発生したトルクを確実に伝達することが可能となる
。一方、第2図によってもわかる様に、ロータ12の内
周面は概ね多角形状から成るため、該ロータ12と充填
されたモールド樹脂24とは互いに滑りを生ずることが
ない。As the output shaft load used in this structure is zero, a threaded portion 11 as shown in FIG.
When formed using a lathe, the filled molded resin 24 and the threaded portion 11 engage with each other, and the rotor 1
2. It becomes possible to reliably transmit the torque generated in 2. On the other hand, as can be seen from FIG. 2, since the inner circumferential surface of the rotor 12 has a generally polygonal shape, the rotor 12 and the filled mold resin 24 do not slip against each other.
トルクの伝達を確実に行なうことのみを考えれば、軸方
向に溝を有するスプラインが最適であるが、その場合は
出力軸10と充填されたモールド用樹脂24とが軸方向
に相対滑りを生ずる可能性がある。従って、ねじの様に
螺旋溝を設けることが最も好ましく、またスプラインを
形成する場合と異なり、手軽に使用できる旋盤を使用し
て加工でき、効率的に低コストで出力軸の製作が可能で
ある。充填されたモールド樹脂24との相対滑りを押さ
えることが目的であるため、第6図に示す様に、第5図
のねじ11ではなく出力軸lO′の表面を旋盤によって
粗加工した加工部1r(広い意味でねじに含ませる。)
を設けたものでもよい。Considering only the reliable transmission of torque, a spline having grooves in the axial direction is optimal, but in that case, relative slippage may occur in the axial direction between the output shaft 10 and the filled molding resin 24. There is sex. Therefore, it is most preferable to provide a spiral groove like a screw, and unlike the case of forming a spline, it can be processed using an easily available lathe, and the output shaft can be manufactured efficiently and at low cost. . Since the purpose is to suppress relative slippage with the filled mold resin 24, as shown in FIG. 6, the surface of the output shaft lO' is roughly machined using a lathe instead of the screw 11 in FIG. (Includes screws in a broad sense.)
It is also possible to have a
また第5図や第6図に示す螺旋溝(ねじ1111′)の
ピッチは大きくてもよく、この場合は一条ねじではなく
て多条ねじとしてもよい。Further, the pitch of the helical groove (thread 1111') shown in FIGS. 5 and 6 may be large, and in this case, it may be a multi-start thread instead of a single thread.
上記第6図の粗加工部11′と同等の効果を有するもの
に、ローレフト加工を施した場合が考えられるが、該ロ
ーレット加工は工具を被加工体(出力軸)に強く押し付
ける加工であるため、出力軸に反りが生じ易く、特に細
長い出力軸には不向きである。またトルク伝達のために
は出力軸の外周面をその長手方向に面取りしたり、また
長手方向にキー溝を設けることも考えられるが、前述し
たスプラインと同様、旋盤により加工することができず
コスト高となる。It is conceivable that a row left machining is applied to a part having the same effect as the rough machining section 11' shown in Fig. 6 above, but since the knurling machining is a process in which the tool is strongly pressed against the workpiece (output shaft). , the output shaft tends to warp, making it particularly unsuitable for elongated output shafts. In addition, in order to transmit torque, chamfering the outer peripheral surface of the output shaft in the longitudinal direction or providing a keyway in the longitudinal direction may be considered, but like the spline described above, it cannot be machined with a lathe and is costly. Becomes high.
第7図は第5図に示すねじ部11を有した出力軸10を
使用したロータと、通常の円柱形出力軸を使用したロー
タとにおいて、実験による最大の伝達トルクを百分率で
表示したものである。横軸はロータの雰囲気温度を示し
、縦軸は常温における通常の円柱形出力軸を使用したロ
ータによる最大伝達トルクを100パーセントで表示し
ている。Figure 7 shows the maximum transmitted torque, expressed as a percentage, according to experiments, for a rotor using the output shaft 10 having the threaded portion 11 shown in Figure 5 and a rotor using a normal cylindrical output shaft. be. The horizontal axis shows the ambient temperature of the rotor, and the vertical axis shows the maximum torque transmitted by the rotor using a normal cylindrical output shaft at room temperature, expressed as 100%.
−点鎖線で示す変化曲線38が円柱形出力軸の場合であ
り、実線で示す直線40が本発明構造による場合である
。図から明らかであるが、常温ではエポキシ樹脂は硬化
状態であるため両者に差は見られないが、高温になると
エポキシ樹脂が軟化する傾向にあり、曲線38の方はそ
のトルク伝達性能が大きく低下するが、本発明による場
合は低下が見られない。- The change curve 38 shown by the dotted chain line is for the case of a cylindrical output shaft, and the straight line 40 shown by the solid line is for the case according to the structure of the present invention. As is clear from the figure, at room temperature, epoxy resin is in a hardened state, so there is no difference between the two, but at high temperatures, epoxy resin tends to soften, and curve 38 shows a significant drop in torque transmission performance. However, in the case of the present invention, no decrease is observed.
C発明の効果〕
以上の説明から明らかな様に本発明によれば、旋盤によ
り容易に形成可能なねじ部を有した出力軸を使用して、
ロータに発止するトルクが確実に出力軸に伝達されると
共に、充填モールド樹脂の存在のため出力軸に曲げが生
じない。C Effects of the Invention] As is clear from the above description, according to the present invention, an output shaft having a threaded portion that can be easily formed with a lathe is used,
The torque generated on the rotor is reliably transmitted to the output shaft, and the output shaft is not bent due to the presence of the filled mold resin.
第1図は本発明によりロータと出力軸とを固定結合させ
た場合の正面図、
第2図は第1図の矢視線n−nによる部分拡大横断面図
、
第3図は本発明の固定構造を製作する一過程を示す部分
横断面図、
第4図は第3図に示す場合と異なる製作方法による出力
軸付きロータの部分横断面図、第5図は本発明による固
定構造を構成する出力軸の1実施例、
第6図は第5図に代わる第2の実施例、第7図は本発明
の効果を示すグラフ図。
10・・・出力軸、 u、tr・・・ねじ部、12
・・・ロータ、 14・・・マクネット、16・
・・ロータコア、
22.22’、24・・・モールドされた樹脂、28・
・・注入口、 30・・・円筒状治具ケース、3
2・・・溝。Fig. 1 is a front view of the rotor and output shaft fixedly coupled according to the present invention, Fig. 2 is a partially enlarged cross-sectional view taken along the arrow line nn in Fig. 1, and Fig. 3 is the fixation of the present invention. FIG. 4 is a partial cross-sectional view showing a process of manufacturing the structure; FIG. 4 is a partial cross-sectional view of a rotor with an output shaft produced by a manufacturing method different from that shown in FIG. 3; FIG. One embodiment of the output shaft, FIG. 6 is a second embodiment replacing FIG. 5, and FIG. 7 is a graph showing the effects of the present invention. 10... Output shaft, u, tr... Threaded part, 12
...Rotor, 14...McNet, 16.
...Rotor core, 22.22', 24...Molded resin, 28.
... Inlet, 30 ... Cylindrical jig case, 3
2... Groove.
Claims (1)
したタイプの同期式電動機のロータを出力軸に固定する
構造であって、出力軸の表面にねじ部分を有し、前記ロ
ータを前記ねじ部分を含む領域に亘って前記出力軸に挿
入し、該ねじ部分を含む領域と前記ロータの内周面との
間隙にモールド用樹脂を充填したことを特徴とするラジ
アルタイプの同期電動機ロータと出力軸との固定構造。1. A structure in which the rotor of a synchronous electric motor of a type in which rotor cores and magnets are arranged alternately in the circumferential direction is fixed to an output shaft, and the output shaft has a threaded portion on the surface, and the rotor is fixed to the output shaft. A radial type synchronous motor rotor and an output, characterized in that the rotor is inserted into the output shaft over a region including the screw portion, and a gap between the region including the screw portion and the inner peripheral surface of the rotor is filled with molding resin. Fixed structure with shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63214935A JPH0265636A (en) | 1988-08-31 | 1988-08-31 | Structure for securing rotor and output shaft of radial type synchronous motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63214935A JPH0265636A (en) | 1988-08-31 | 1988-08-31 | Structure for securing rotor and output shaft of radial type synchronous motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0265636A true JPH0265636A (en) | 1990-03-06 |
Family
ID=16664010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63214935A Pending JPH0265636A (en) | 1988-08-31 | 1988-08-31 | Structure for securing rotor and output shaft of radial type synchronous motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0265636A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0434837U (en) * | 1990-07-17 | 1992-03-24 | ||
JP2006230070A (en) * | 2005-02-16 | 2006-08-31 | Honda Motor Co Ltd | Permanent magnet rotor |
CN103312065A (en) * | 2012-03-16 | 2013-09-18 | 西门子公司 | Rotor with permanent excitation, motor with same and method for producing same |
CN103312064A (en) * | 2012-03-16 | 2013-09-18 | 西门子公司 | Rotor with permanent excitation, electric machine having such a rotor and manufacturing method for the rotor |
CN105071569A (en) * | 2015-08-19 | 2015-11-18 | 广东威灵电机制造有限公司 | Rotor and motor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6328251A (en) * | 1986-07-21 | 1988-02-05 | Hitachi Ltd | Rotor for motor |
-
1988
- 1988-08-31 JP JP63214935A patent/JPH0265636A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6328251A (en) * | 1986-07-21 | 1988-02-05 | Hitachi Ltd | Rotor for motor |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0434837U (en) * | 1990-07-17 | 1992-03-24 | ||
JP2006230070A (en) * | 2005-02-16 | 2006-08-31 | Honda Motor Co Ltd | Permanent magnet rotor |
CN103312065A (en) * | 2012-03-16 | 2013-09-18 | 西门子公司 | Rotor with permanent excitation, motor with same and method for producing same |
CN103312064A (en) * | 2012-03-16 | 2013-09-18 | 西门子公司 | Rotor with permanent excitation, electric machine having such a rotor and manufacturing method for the rotor |
US9509185B2 (en) | 2012-03-16 | 2016-11-29 | Siemens Aktiengesellschaft | Rotor with permanent excitation including permanent magnets and soft-magnetic flux conducting elements therebetween, electric machine having such a rotor and manufacturing method for the rotor |
CN105071569A (en) * | 2015-08-19 | 2015-11-18 | 广东威灵电机制造有限公司 | Rotor and motor |
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