JPS60204235A - Stator of small-sized rotary electric machine - Google Patents

Abstract

PURPOSE:To enhance the bonding strength of a yoke to a permanent magnet and auxiliary poles by pressing, filling and plastically bonding part of the yoke to the holes of holding fittings. CONSTITUTION:Holding fittings 3 made of a plurality of elastic material of U- shaped section are disposed on the inner periphery of a cylindrical yoke 2, and yoke members are filled, pressed by a press and plastically bonded from the outer periphery of the yoke 2 to a plurality of holes 33 formed at the fittings 3. Axial supports 31, 32 of the poles are provided on the sides of the fittings 3, permanent magnets 4 are inserted into one and an auxiliary pole 5 made of a soft steel is inserted into the other, the entire pole is pressed by U-shaped elastic unit to secure the pole to the yoke. Further, an elastic steel strip 8 which has a length slightly longer than the entire length of the inner periphery is inserted into the inner periphery of the poles, pressure is applied from the inner peripheral side to be deflected to the gap between the poles to butt the both ends, thereby preventing the poles from moving.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は永久磁石を界磁にした小形回転機の固定子に係
り、特に継鉄に磁極を固定する手段として弾性体を使用
して強持するに好適な保持金具の構造に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a stator for a small rotating machine in which a permanent magnet is used as a field. The present invention relates to a structure of a holding fitting suitable for

【発明の背景〕[Background of the invention]

従来の小形回転機固定子は、継鉄に永久磁石及び補助極
を接着剤を用いて固着するか、特開昭５７−１６５６１
の如く内周に弾性体を用いて固定する等の手法を用いて
いた。しかし、接着剤を用いると継鉄と永久磁石の熱膨
張係数の差によって接着境界面の接着剤に大きな力が作
用し、接着剤が弱い場合には剥離が、強い場合には永久
磁石の二枚割れが生じ、急激な温度変化や使用温度差の
大きな場合には実用化に於て制限があった。Conventional stators for small rotating machines are manufactured by fixing permanent magnets and auxiliary poles to yoke iron using adhesive, or by
Methods such as fixing using an elastic body on the inner periphery were used. However, when adhesive is used, a large force acts on the adhesive at the adhesive interface due to the difference in thermal expansion coefficient between the yoke and the permanent magnet, and if the adhesive is weak, it may peel, and if it is strong, the permanent magnet may Cracks occur, and there are limits to practical use in cases where there is a sudden temperature change or a large difference in operating temperatures.

〔発明の目的〕[Purpose of the invention]

本発明の目的は継鉄と永久磁石及び補助極の固着強度に
優れ、急激な温度変化、振動、衝撃、水に対しても耐力
の高い小形回転機の固定子を提供することにある。An object of the present invention is to provide a stator for a small rotating machine that has excellent fixing strength between a yoke, a permanent magnet, and an auxiliary pole, and has high resistance to sudden temperature changes, vibrations, shocks, and water.

（発明の概要〕 継鉄と塑性結合した断面コ字状弾性体から成る複数個の
保持金具に軸方向支持部を設け、一方に永久磁石を、他
方に補助極を挟持し、磁極全体をコ字形弾性体で円周方
向に押圧し磁極を継鉄に固定、更に内周に弾性体を配置
し磁極の動きを防止した固定子で、熱衝撃や振動に対し
ても磁石の割れや破損、脱落を防止したものである。(Summary of the Invention) A plurality of holding fittings made of elastic bodies having a U-shaped cross section that are plastically bonded to a yoke are provided with axial support parts, a permanent magnet is held on one side, an auxiliary pole is held on the other side, and the entire magnetic pole is held in place by the yoke. The stator uses a shaped elastic body to press in the circumferential direction to fix the magnetic poles to the yoke, and an elastic body is placed on the inner periphery to prevent the magnetic poles from moving.This stator prevents magnets from cracking or breaking due to thermal shock or vibration. This prevents it from falling off.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を第１〜５図により説明する。 An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

１は固定子で円筒状の継鉄２の内周に複数個の弾性体か
ら成る保持金具３を金型６にセットして配置し、保持金
具３に設けた複数の穴３３に継鉄２の外周からプレス７
で抑圧して継鉄部材を充填し塑性結合によって固定する
。保持金具の側面には磁極の軸方向支持部３１．３２を
設け、一方に永久磁石４を他方に軟鋼から成る補助極５
を挿入し、磁極全体をコ字状弾性体で押圧して磁極を継
鉄に押圧固定してい、る。更に、磁極内周に内周全長よ
り僅かに長い弾性鋼帯８を入れ、内周突合せて配置し磁
極の動きを防止する。Reference numeral 1 denotes a stator, and a holding fitting 3 made of a plurality of elastic bodies is set and arranged in a mold 6 on the inner circumference of a cylindrical yoke 2, and the yoke 2 is inserted into a plurality of holes 33 provided in the holding fitting 3. Press 7 from the outer periphery of
The yoke is filled with a yoke and fixed by plastic bonding. Axial supports 31, 32 for magnetic poles are provided on the sides of the holding fixture, with a permanent magnet 4 on one side and an auxiliary pole 5 made of mild steel on the other side.
is inserted, and the entire magnetic pole is pressed with a U-shaped elastic body to press and fix the magnetic pole to the yoke. Further, an elastic steel band 8 slightly longer than the entire length of the inner circumference is placed on the inner circumference of the magnetic pole, and is placed so as to abut against the inner circumference to prevent movement of the magnetic pole.

このような構成に於て、永久磁石４及び補助極５の軸方
向側面は中心から放射状の接線面４１を設け、この面が
互いに当たるようにする。更に保持金具３も予め約コ字
形に成形し、永久磁石４と補助極５の間にコ字形を撓ま
ぜながら抑圧配置することによって、この張力が永久磁
石４と補助極５を押し、継鉄２に抑圧固定している。こ
れは、放射状の接線面を設けたことによって保持金具の
張力が磁極を継鉄外周方向に押す効果がある。更に保持
金具３に設４フた複数の補強リブ３４は挿入寸法のバラ
ツキにより巾が狭いと第４図に示すように折曲部の角が
大きな曲Ｒになり、保持金具３が浮上って内周面に突出
するのを防止する目的で設けである。In such a configuration, the axial side surfaces of the permanent magnet 4 and the auxiliary pole 5 are provided with tangential surfaces 41 radiating from the center, so that these surfaces come into contact with each other. Furthermore, the holding fitting 3 is also formed in advance into a U-shape, and is compressed and placed between the permanent magnet 4 and the auxiliary pole 5 while bending the U-shape, so that this tension pushes the permanent magnet 4 and the auxiliary pole 5, and the yoke Suppression is fixed at 2. This is because the tension of the holding fitting has the effect of pushing the magnetic pole toward the outer circumferential direction of the yoke due to the provision of the radial tangential surface. Furthermore, if the width of the plurality of reinforcing ribs 34 provided on the holding metal fitting 3 is narrow due to variations in insertion dimensions, the corners of the bent portions will form large curves as shown in Fig. 4, and the holding metal fitting 3 will float. This is provided for the purpose of preventing it from protruding to the inner circumferential surface.

このように、本発明によれば従来のような鉄加締では穴
ピッチに高精度が要求されるのに対し、簡単な方法で永
久磁石４と補助極５を固定できる。As described above, according to the present invention, the permanent magnet 4 and the auxiliary pole 5 can be fixed by a simple method, whereas conventional iron caulking requires high precision in hole pitch.

更に継鉄内周を固定子固定用のボルトが通る構造では、
鉄または継鉄押出部を訓辞た場合頭部がボルトと干渉す
ることが考え゛られ、これに対しても出張りがないため
固定が確実にできる。Furthermore, in a structure where bolts for fixing the stator pass through the inner circumference of the yoke,
If the iron or yoke extrusion part is attached, the head may interfere with the bolt, but since there is no protrusion, it can be fixed securely.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、保持金具の穴に継鉄の一部を抑圧充填
し塑性結合で固定することにより１部品精度の低い部品
が使用できる。又、内周側に出張りが無いため固定子固
定ボルトの貫通が容易である。次に保持金具に円周方向
の補強リブを設けたことにより保持金具に内周側への飛
出しが防止でき、内径精度の向上を削ることができる。According to the present invention, a part of the yoke is suppressed and filled into the hole of the holding fitting and fixed by plastic bonding, so that a single part with low precision can be used. Furthermore, since there is no protrusion on the inner circumferential side, it is easy for the stator fixing bolts to penetrate. Next, by providing a reinforcing rib in the circumferential direction on the holding metal fitting, it is possible to prevent the holding metal fitting from protruding toward the inner circumferential side, and it is possible to reduce the improvement in inner diameter accuracy.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は小形回転機固定子の要部正面図、第２図は保持
金具詳細図、第３図は第１図のＡ　・−Ａ断面図、第４
図は第２図の斜視図、第５図は従来の保持金具の使用状
態図である。 １・・・固定子、２・・・継鉄、３・・・保持金具、４
・・・永久磁石、５・・・補助極、６・・・金型、７・
・・プレス、３１゜第１区 １ “５ Ｊ／ＩＬ二■二壮二■二二ヱ＊ＪＺFigure 1 is a front view of the main parts of the stator of a small rotating machine, Figure 2 is a detailed view of the holding bracket, Figure 3 is a sectional view of A - A in Figure 1, and Figure 4 is
The figure is a perspective view of FIG. 2, and FIG. 5 is a view of the conventional holding fitting in use. 1...Stator, 2...Yoke, 3...Holding metal fittings, 4
...Permanent magnet, 5...Auxiliary pole, 6...Mold, 7.
...Press, 31゜1st Ward 1 “5 J/IL 2■2So2■22ヱ*JZ

Claims (1)

【特許請求の範囲】 １、円筒状の継鉄内周に複数個の補助極と永久磁石を配
置した固定子に於て、断面コ字状弾性体から成る磁極保
持金具に設けた穴に、継鉄から押し出した部材を充填し
て塑性結合し継鉄と固定するこの保持金具には、軸方向
支持部の一方に永久磁石を、他方に補助極を挟持し、コ
字状弾性部で押して継鉄円周に密着させた内周に弾性銅
帯を配置したことを特徴とする小形回転機の固定子。 ２、特許請求の範囲第１項において、磁極を強持する継
鉄に結合固定された保持金具は、１つの側面に軸方向の
抑圧弾性部を２個、他の側面に抑圧弾性部と爪部を設け
、各々挿入物体を強持するが、保持金具は継鉄と接する
面に複数の円周方向の補強リブを設けたことを特徴とす
る小形回転機の固定子。[Claims] 1. In a stator in which a plurality of auxiliary poles and permanent magnets are arranged on the inner periphery of a cylindrical yoke, a hole provided in a magnetic pole holding fitting made of an elastic body having a U-shaped cross section, This holding metal fitting, which is filled with parts extruded from the yoke and plastically bonded and fixed to the yoke, has a permanent magnet on one side of the axial support part and an auxiliary pole on the other side, and is pressed with a U-shaped elastic part. A stator for a small rotating machine characterized by an elastic copper band placed on the inner periphery in close contact with the yoke circumference. 2. In claim 1, the holding metal fitting fixed to the yoke that firmly holds the magnetic pole has two axially suppressing elastic parts on one side and a suppressing elastic part and a claw on the other side. 1. A stator for a small rotating machine, characterized in that the holding fitting is provided with a plurality of reinforcing ribs in the circumferential direction on a surface in contact with the yoke.