JP3397119B2 - Magnet rotor for rotating electric machines - Google Patents
Magnet rotor for rotating electric machinesInfo
- Publication number
- JP3397119B2 JP3397119B2 JP04147598A JP4147598A JP3397119B2 JP 3397119 B2 JP3397119 B2 JP 3397119B2 JP 04147598 A JP04147598 A JP 04147598A JP 4147598 A JP4147598 A JP 4147598A JP 3397119 B2 JP3397119 B2 JP 3397119B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- boss member
- magnet holding
- axial direction
- holding member
- 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 - Fee Related
Links
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、磁石式交流発電機
や、ブラシレスモータなどの回転電機に用いる磁石回転
子に関し、特に内燃機関に取り付ける磁石発電機に用い
るのに好適な磁石回転子に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet rotor used in a rotary electric machine such as a magnet type AC generator or a brushless motor, and more particularly to a magnet rotor suitable for use in a magnet generator installed in an internal combustion engine. Is.
【０００２】[0002]
【従来の技術】磁石式交流発電機またはブラシレスモー
タなどの回転電機において、回転子の重量を軽くし、そ
の慣性モーメントを小さくする必要がある場合には、回
転子を固定子の内側に配置して、固定子の内側で回転さ
せる内転形の構成をとることが多い。2. Description of the Related Art In a rotary electric machine such as a magnet type AC generator or a brushless motor, when it is necessary to reduce the weight of the rotor and reduce the moment of inertia of the rotor, the rotor is placed inside the stator. In many cases, an inversion type structure in which the rotor is rotated inside the stator is adopted.
【０００３】特に、レース用の内燃機関駆動車両におい
て、内燃機関に取り付けた磁石式交流発電機の出力で内
燃機関用点火装置を動作させる場合には、機関の加速性
能及び減速性能が損なわれないようにするために、機関
に取り付ける発電機の回転子の慣性モーメントを極力小
さくすることが必要とされる。Particularly, in an internal combustion engine driven vehicle for racing, when the ignition device for an internal combustion engine is operated by the output of a magnet type AC generator mounted on the internal combustion engine, the acceleration performance and deceleration performance of the engine are not impaired. In order to do so, it is necessary to minimize the moment of inertia of the rotor of the generator attached to the engine.
【０００４】図９（Ａ）及び（Ｂ）は、内燃機関に取り
付けられていた従来の内転形磁石発電機の磁石回転子１
を示したもので、図９（Ａ）は正面図、図９（Ｂ）は同
図（Ａ）のＤ−Ｄ線断面図である。これらの図において
２は鉄または鉄合金などの強磁性材料からなる筒状のボ
ス部材で、このボス部材の内側には、図示しない内燃機
関の回転軸の先端に設けられたテーパ部を嵌合させるた
めのテーパ孔２ａが設けられている。ボス部材２は、そ
の横断面の輪郭形状が六角形を呈するように形成されて
いて、ボス部材２の外周に形成された６個の平坦面上に
それぞれ６個の板状の永久磁石３が配置されている。各
永久磁石３の外側の磁極面上に磁極片４が配置され、ボ
ス部材２に設けられたネジ孔に各磁極片４と永久磁石３
とを貫通してねじ込まれたネジ５により、各磁極片４及
び永久磁石３がボス部材２に固定されている。FIGS. 9A and 9B show a magnet rotor 1 of a conventional adder-type magnet generator mounted on an internal combustion engine.
9A is a front view, and FIG. 9B is a sectional view taken along line D-D in FIG. 9A. In these figures, 2 is a cylindrical boss member made of a ferromagnetic material such as iron or iron alloy, and a taper portion provided at the tip of a rotary shaft of an internal combustion engine (not shown) is fitted inside the boss member. A taper hole 2a is provided to allow it. The boss member 2 is formed such that the contour shape of its cross section is hexagonal, and six plate-shaped permanent magnets 3 are provided on each of the six flat surfaces formed on the outer periphery of the boss member 2. It is arranged. A magnetic pole piece 4 is arranged on the magnetic pole surface on the outer side of each permanent magnet 3, and each magnetic pole piece 4 and the permanent magnet 3 are provided in a screw hole provided in the boss member 2.
The magnetic pole pieces 4 and the permanent magnets 3 are fixed to the boss member 2 by screws 5 which penetrate through and are screwed.
【０００５】また機関の高速回転時に遠心力により磁極
片４及び永久磁石３が外側に飛び出すのを防ぐために、
ボス部材２の外周面と永久磁石３の側面と磁極片４の端
部とを被覆するようにアルミニュウムからなるモールド
部６が形成されている。ボス部材２の周方向に等角度間
隔で並ぶ６個の永久磁石３は、交互に極性を異ならせて
ボス部材２の径方向の着磁され、これらの磁石により６
極の磁石界磁が構成されている。Further, in order to prevent the pole piece 4 and the permanent magnet 3 from jumping out due to centrifugal force when the engine rotates at a high speed,
A mold portion 6 made of aluminum is formed so as to cover the outer peripheral surface of the boss member 2, the side surface of the permanent magnet 3, and the end portion of the pole piece 4. The six permanent magnets 3 lined up at equal angular intervals in the circumferential direction of the boss member 2 are magnetized in the radial direction of the boss member 2 by alternately changing their polarities.
A pole magnet field is constructed.
【０００６】図９に示した磁石回転子１は、図示しない
内燃機関の回転軸の先端に設けられたテーパ部をボス部
材２の内側のテーパ孔２ａに嵌合させて、ネジなどの締
結手段によりボス部材２を回転軸の先端のテーパ部に対
して締め付けることにより機関に取り付けられる。内燃
機関にはまた、磁石回転子１の磁極片４に対向する磁極
部を有する電機子鉄心と該電機子鉄心に巻回された電機
子コイルとを備えた固定子が取り付けられ、該固定子と
磁石回転子１とにより磁石式交流発電機が構成される。In the magnet rotor 1 shown in FIG. 9, a taper portion provided at the tip of a rotary shaft of an internal combustion engine (not shown) is fitted in the taper hole 2a inside the boss member 2 and a fastening means such as a screw. Thus, the boss member 2 is attached to the engine by being fastened to the taper portion at the tip of the rotary shaft. The internal combustion engine is also provided with a stator provided with an armature core having magnetic pole portions facing the magnetic pole pieces 4 of the magnet rotor 1 and an armature coil wound around the armature core. The magnet rotor 1 and the magnet rotor 1 constitute a magnet type AC generator.
【０００７】[0007]
【発明が解決しようとする課題】図９に示した従来の磁
石回転子では、磁極片４と永久磁石３とをネジ５により
ボス部材２に固定していたため、磁石回転子１に振動が
加わった場合にネジ５が緩んで、磁極片４及び永久磁石
３の取付け強度が低下するおそれがあった。In the conventional magnet rotor shown in FIG. 9, since the magnetic pole piece 4 and the permanent magnet 3 are fixed to the boss member 2 by the screw 5, the magnet rotor 1 is vibrated. In that case, the screw 5 may loosen, and the attachment strength of the pole piece 4 and the permanent magnet 3 may decrease.
【０００８】更に図９に示した磁石回転子では、磁極片
４の周囲がアルミニュウムからなるモールド部６により
囲まれていたため、磁石回転子が回転した際にモールド
部６の磁極片４を囲む領域に渦電流が流れて多くの損失
が生じ、回転電機の効率が悪くなる上に、回転子からの
発熱が多くなるという問題があった。Further, in the magnet rotor shown in FIG. 9, since the magnetic pole piece 4 is surrounded by the mold portion 6 made of aluminum, the area surrounding the magnetic pole piece 4 of the mold portion 6 when the magnet rotor rotates. There is a problem that an eddy current flows through the rotor, causing a lot of loss, which deteriorates the efficiency of the rotating electric machine and causes more heat generation from the rotor.
【０００９】また、モールド部６は、永久磁石３及び磁
極片４をネジ５により固定したボス部材２を射出成型用
金型内に挿入して、該金型内にアルミニュウムの湯を射
出することにより形成されるため、モールド部６を形成
する際に永久磁石３の温度が上昇して該磁石が減磁させ
られることがあった。Further, in the molding part 6, the boss member 2 in which the permanent magnet 3 and the magnetic pole piece 4 are fixed by the screw 5 is inserted into the injection molding die, and aluminum water is injected into the die. Therefore, the temperature of the permanent magnet 3 may rise and the magnet may be demagnetized when the mold portion 6 is formed.
【００１０】永久磁石３としてフェライト磁石を用いる
場合には、その着磁を容易に行うことができるため、回
転子を組み立てた後に永久磁石の着磁を行うようにすれ
ば、回転子の製造過程で磁石の温度が上昇しても特に問
題がない。しかしながら、永久磁石３として希土類磁石
のような、大容量の着磁装置を必要とする磁石を用いる
場合には、回転子を組み立てた後に磁石を着磁すること
は困難であるため、磁石回転子の製造過程で永久磁石の
温度が上昇して減磁が生じるようなことは避ける必要が
ある。When a ferrite magnet is used as the permanent magnet 3, it can be easily magnetized. Therefore, if the permanent magnet is magnetized after the rotor is assembled, the manufacturing process of the rotor will be described. Therefore, there is no particular problem even if the temperature of the magnet rises. However, when a magnet requiring a large-capacity magnetizing device, such as a rare earth magnet, is used as the permanent magnet 3, it is difficult to magnetize the magnet after the rotor is assembled. It is necessary to avoid that the temperature of the permanent magnet rises and demagnetization occurs in the manufacturing process of.
【００１１】本発明の目的は振動により緩みが生じる部
分を無くして機械的強度が低下するおそれをなくした回
転電機用磁石回転子を提供することにある。An object of the present invention is to provide a magnet rotor for a rotating electric machine, which eliminates a portion that is loosened by vibration and eliminates the possibility of lowering mechanical strength.
【００１２】本発明の他の目的は、渦電流損を少なくす
ることができるようにした回転電機用磁石回転子を提供
することにある。Another object of the present invention is to provide a magnet rotor for a rotary electric machine which can reduce eddy current loss.
【００１３】本発明の更に他の目的は、磁石の温度の上
昇を伴う製造過程を経ることなく、組み立てを行うこと
ができるようにした回転電機用磁石回転子を提供するこ
とにある。Still another object of the present invention is to provide a magnet rotor for a rotating electric machine, which can be assembled without going through a manufacturing process involving an increase in temperature of the magnet.
【００１４】[0014]
【課題を解決するための手段】本発明においては、上記
の目的を達成するため、回転軸に結合されるボス部材の
外周に絶縁樹脂製の磁石保持部材を固定して、該磁石保
持部材により板状の永久磁石を保持させるようにした。In the present invention, in order to achieve the above object, a magnet holding member made of an insulating resin is fixed to the outer periphery of a boss member coupled to a rotating shaft, and the magnet holding member is used. The plate-shaped permanent magnet was held.
【００１５】本発明で用いるボス部材は、鉄または鉄合
金などの強磁性材料により筒状に形成されていて、その
内側には回転軸を嵌合させるための孔が設けられ、その
外周側には、周方向に間隔をあけて並ぶ複数のアリ溝が
設けられている。The boss member used in the present invention is formed of a ferromagnetic material such as iron or iron alloy into a cylindrical shape, and a hole for fitting a rotary shaft is provided inside the boss member, and an outer peripheral side thereof is provided. Is provided with a plurality of dovetail grooves arranged at intervals in the circumferential direction.
【００１６】また磁石保持部材は、ボス部材の外周を取
り囲むように環状に形成された周壁部と、該周壁部の内
周部の複数のアリ溝にそれぞれ対応する位置から径方向
の内側に突出した複数のアリとを有していて、各アリが
ボス部材の対応するアリ溝に嵌合されてボス部材に固定
されている。The magnet holding member projects inward in the radial direction from positions corresponding to the peripheral wall portion formed in an annular shape so as to surround the outer periphery of the boss member and the plurality of dovetail grooves on the inner peripheral portion of the peripheral wall portion. A plurality of dovetails, each of which is fitted into a corresponding dovetail groove of the boss member and fixed to the boss member.
【００１７】磁石保持部材の周壁部にはボス部材の周方
向に等角度間隔で並ぶ複数の磁石保持孔が該周壁部を貫
通した状態で形成され、該複数の磁石保持孔内にそれぞ
れ板状の永久磁石が収容されている。各永久磁石はボス
部材の径方向に着磁されている。A plurality of magnet holding holes lined up at equal angular intervals in the circumferential direction of the boss member are formed in the peripheral wall portion of the magnet holding member so as to penetrate through the peripheral wall portion, and each of the plurality of magnet holding holes has a plate shape. The permanent magnet of is housed. Each permanent magnet is magnetized in the radial direction of the boss member.
【００１８】各磁石保持孔の内面には、各磁石保持孔の
断面積をボス部材の径方向の外側に向うに従って次第に
小さくする向きのテーパが付けられたテーパ部が設けら
れ、各磁石保持孔の内面に接する各永久磁石の側面に
は、磁石保持孔の内面のテーパ部と同じ方向に傾斜した
テーパ部が設けられている。各磁石保持孔の内面のテー
パ部に各永久磁石の側面のテーパ部が当接されて、永久
磁石の抜け止めが図られている。The inner surface of each magnet holding hole is provided with a taper portion tapered such that the cross-sectional area of each magnet holding hole is gradually reduced toward the outside in the radial direction of the boss member. On the side surface of each permanent magnet that is in contact with the inner surface of the magnet, a taper portion that is inclined in the same direction as the taper portion of the inner surface of the magnet holding hole is provided. The tapered portion of the side surface of each permanent magnet is brought into contact with the tapered portion of the inner surface of each magnet holding hole to prevent the permanent magnet from coming off.
【００１９】上記のように、ボス部材を取り囲む環状の
磁石保持部材に設けた磁石保持孔内に永久磁石を収容し
て、磁石保持孔の内面及び永久磁石の側面にそれぞれテ
ーパ部を設けることにより永久磁石の抜け止めを図ると
ともに、絶縁樹脂製の磁石保持部材とボス部材とをアリ
とアリ溝との嵌合により結合する構造にすると、磁極片
を用いることなく、またネジやアルミニュウムのモール
ド部を用いずに永久磁石をボス部材に強固に固定するこ
とができるので、コストの低減を図って、しかも遠心力
に対する機械的強度が高い磁石回転子を得ることができ
る。As described above, the permanent magnet is housed in the magnet holding hole provided in the annular magnet holding member surrounding the boss member, and the inner surface of the magnet holding hole and the side surface of the permanent magnet are provided with tapered portions. If the structure is designed to prevent the permanent magnet from coming off and to connect the magnet holding member made of insulating resin and the boss member by fitting the dovetail and the dovetail groove, it is possible to use a screw or aluminum mold part without using a pole piece. Since the permanent magnet can be firmly fixed to the boss member without using the magnet rotor, it is possible to reduce the cost and obtain a magnet rotor having high mechanical strength against centrifugal force.
【００２０】また上記のようにネジを用いずに永久磁石
をボス部材に固定するようにすると、振動が加わった場
合に緩む個所がなくなるので、振動に強い磁石回転子を
得ることができる。If the permanent magnet is fixed to the boss member without using the screws as described above, there is no place to loosen when vibration is applied, so that a magnet rotor resistant to vibration can be obtained.
【００２１】更に上記のように、アルミニュウムのモー
ルド部を設けることなく、絶縁樹脂製の磁石保持部材に
永久磁石を保持させるようにすると、永久磁石を取り囲
む領域に渦電流が流れることがなくなるので、渦電流損
を少なくして、回転電機の効率を高めることができる上
に、磁石回転子からの発熱を少なくすることができる。Further, as described above, when the permanent magnet is held by the magnet holding member made of the insulating resin without providing the aluminum mold portion, the eddy current does not flow in the region surrounding the permanent magnet. It is possible to reduce the eddy current loss, improve the efficiency of the rotating electric machine, and reduce heat generation from the magnet rotor.
【００２２】また上記のように構成すると、磁極片を必
要としないため、磁石回転子の軽量化を図ることがで
き、回転子の慣性モーメントを小さくする要求に容易に
応えることができる。Further, with the above construction, since the magnetic pole pieces are not required, the weight of the magnet rotor can be reduced, and the demand for reducing the moment of inertia of the rotor can be easily met.
【００２３】本発明においてはまた、上記複数の永久磁
石の外側の磁極面を磁石保持部材とともに覆う環状の非
磁性磁石カバーをボス部材に固定しておくのが好まし
い。In the present invention, it is also preferable that an annular non-magnetic magnet cover that covers the outer magnetic pole surfaces of the plurality of permanent magnets together with the magnet holding member is fixed to the boss member.
【００２４】本発明においてはまた、ボス部材の軸線方
向の一端寄りの外周部に外鍔部を形成して該外鍔部に磁
石保持部材の軸線方向の一端を当接させることにより、
磁石保持部材の位置決めを図るようにするのが好まし
い。また磁石保持部材の幅寸法を、ボス部材の外鍔部と
ボス部材の軸線方向の他端との間の距離にほぼ等しく設
定して、磁石保持部材の軸線方向の他端を、ボス部材の
軸線方向の他端とほぼ同じ位置に配置するようにしてお
くのが好ましい。In the present invention, an outer flange portion is formed on the outer peripheral portion of the boss member near one end in the axial direction, and one end in the axial direction of the magnet holding member is brought into contact with the outer flange portion.
The magnet holding member is preferably positioned. Further, the width dimension of the magnet holding member is set substantially equal to the distance between the outer collar portion of the boss member and the other end of the boss member in the axial direction, and the other end of the magnet holding member in the axial direction is set to the boss member. It is preferably arranged at substantially the same position as the other end in the axial direction.
【００２５】この場合、磁石カバーの軸線方向の一端側
及び他端側にそれぞれ内鍔部を設けて、該磁石カバーの
一端側の内鍔部及び他端側の内鍔部をそれぞれボス部材
の外周の鍔部及びボス部材の他端側の端面に外側から当
接させることにより、磁石カバーをボス部材に対して固
定することができる。In this case, the inner flange portions are provided on one end side and the other end side of the magnet cover in the axial direction, and the inner flange portions on one end side and the other end side of the magnet cover are respectively formed on the boss member. The magnet cover can be fixed to the boss member by abutting the flange portion on the outer periphery and the end surface on the other end side of the boss member from the outside.
【００２６】本発明においてはまた、磁石保持部材の周
壁部の軸線方向の一端側の側面の内周寄りの部分に軸線
方向に突出した突起を設けるとともに、ボス部材側に
は、磁石保持部材の突起を嵌合させるための凹部を軸線
方向に開口した状態で設けて、磁石保持部材の突起をボ
ス部材側に設けられた凹部にボス部材の軸線方向から嵌
合させることにより、磁石保持部材の軸線方向の一端を
ボス部材に拘束するのが好ましい。このような構造にす
ると、磁石保持部材をよりいっそう強固にボス部材に固
定することができるため、遠心力により磁石保持部材が
外側に膨らむのをより確実に防いで、磁石の取り付け強
度を更に向上させることができる。In the present invention, a projection projecting in the axial direction is provided on a portion of the side wall of the peripheral wall portion of the magnet holding member on the side of one end in the axial direction near the inner circumference, and the boss member side of the magnet holding member is provided. A recess for fitting the projection is provided in the state of opening in the axial direction, and the projection of the magnet holding member is fitted in the recess provided on the boss member side from the axial direction of the boss member. It is preferable to restrain one end in the axial direction to the boss member. With such a structure, the magnet holding member can be more firmly fixed to the boss member, so that the magnet holding member is more reliably prevented from bulging outward due to centrifugal force, and the magnet mounting strength is further improved. Can be made.
【００２７】[0027]
【発明の実施の形態】図１ないし図７は、本発明の一実
施形態を示したもので、図１は本発明に係わる磁石回転
子を用いた磁石式交流発電機の構成例を示した正面図、
図２は図１のＡ−Ａ線断面図である。また図３は本発明
に係わる磁石回転子の半部を断面して示した正面図、図
４は図３のＢ−Ｂ線断面図、図５は本発明の磁石回転子
で用いる磁石保持部材の正面図、図６は図５のＣ−Ｃ線
断面図である。図７は本発明で用いる磁石保持部材と該
磁石保持部材により保持される永久磁石とを示した斜視
図である。1 to 7 show an embodiment of the present invention, and FIG. 1 shows an example of the configuration of a magnet type AC generator using a magnet rotor according to the present invention. Front view,
2 is a sectional view taken along the line AA of FIG. 3 is a front view showing a half portion of a magnet rotor according to the present invention in section, FIG. 4 is a sectional view taken along the line BB of FIG. 3, and FIG. 5 is a magnet holding member used in the magnet rotor of the present invention. And FIG. 6 is a sectional view taken along line CC of FIG. FIG. 7 is a perspective view showing a magnet holding member used in the present invention and a permanent magnet held by the magnet holding member.
【００２８】図１及び図２において、１０は固定子、１
１は固定子１０の内側に配置された本発明に係わる磁石
回転子であり、固定子１０と磁石回転子１１とにより磁
石式交流発電機１２が構成されている。1 and 2, 10 is a stator, 1
Reference numeral 1 denotes a magnet rotor according to the present invention which is arranged inside the stator 10. The stator 10 and the magnet rotor 11 constitute a magnet type AC generator 12.
【００２９】固定子１０は、環状の継鉄部１３ｙの内周
部から径方向の内側に等角度間隔で６個の突極部１３ａ
〜１３ｆを突出させた環状の電機子鉄心１３と、該電機
子鉄心の突極部１３ａ〜１３ｆにそれぞれ巻回された電
機子コイル１４ａ〜１４ｆとからなっている。電機子鉄
心１３は、所定の形状に打ち抜いた鋼板の積層体１３Ａ
と、該積層体を間にして対向配置された１対の側板１３
Ｂ，１３Ｂとをリベット１５により締め付けた構造を有
するもので、その継鉄部１３ｙには、３つの取付け孔１
３Ｄが１２０度間隔で設けられている。また電機子鉄心
の突極部１３ａ〜１３ｆのそれぞれの先端部には、側板
１３Ｂ，１３Ｂを外側に折り曲げることにより形成され
た極片部１３B1，１３B1（図２参照）が設けられ、突極
部１３ａ〜１３ｆのそれぞれの先端面と極片部とにより
固定子側の磁極部が構成されている。The stator 10 includes six salient pole portions 13a radially inward from the inner peripheral portion of the annular yoke portion 13y at equal angular intervals.
.. to 13f are protruded, and the armature core 13 has an annular shape, and armature coils 14a to 14f are wound around salient pole portions 13a to 13f of the armature core. The armature core 13 is a laminated body 13A of steel plates punched into a predetermined shape.
And a pair of side plates 13 opposed to each other with the laminated body in between.
B and 13B have a structure in which they are fastened with rivets 15, and the yoke portion 13y has three mounting holes 1
3D is provided at intervals of 120 degrees. Further, pole piece portions 13B1 and 13B1 (see FIG. 2) formed by bending the side plates 13B and 13B outward are provided at the respective tip portions of the salient pole portions 13a to 13f of the armature core, and the salient pole portions are formed. A magnetic pole portion on the side of the stator is formed by the respective tip surfaces of 13a to 13f and the pole piece portion.
【００３０】本発明に係わる磁石回転子１１は、図３及
び図４にも示したように、鉄等の強磁性材料からなるボ
ス部材１６と、絶縁樹脂の成型品からなる磁石保持部材
１７と、複数の永久磁石１８と、磁石カバー１９とによ
り構成されている。本発明において、永久磁石１８の種
類は問わないが、図示の例では、永久磁石１８として希
土類磁石を用いている。As shown in FIGS. 3 and 4, the magnet rotor 11 according to the present invention includes a boss member 16 made of a ferromagnetic material such as iron, and a magnet holding member 17 made of an insulating resin molding. It is composed of a plurality of permanent magnets 18 and a magnet cover 19. In the present invention, the permanent magnet 18 may be of any type, but in the illustrated example, a rare earth magnet is used as the permanent magnet 18.
【００３１】ボス部材１６は、その全体がほぼ円筒状を
呈するように形成されていて、その一端の外周側には拡
大径部１６ａが設けられ、その内側には図示しない内燃
機関の回転軸を嵌合させるためのテーパ孔１６ｂが形成
されている。ボス部材１６の外周側には、複数（図示の
例では８個）のアリ溝１６ｃ，１６ｃ，…が等角度間隔
で設けられ、ボス部材１６の軸線方向の一端寄りの外周
部には、拡大径部１６ａよりも小径の外鍔部１６ｄが形
成されている。図示の各アリ溝１６ｃは、断面が鳩尾状
を呈する溝からなっていて、その長手方向の一端がボス
部材１６の他端側に開口するように設けられている。The boss member 16 is formed so as to have a substantially cylindrical shape as a whole, and an enlarged diameter portion 16a is provided on the outer peripheral side of one end of the boss member 16, and a rotating shaft of an internal combustion engine (not shown) is provided inside thereof. A tapered hole 16b for fitting is formed. On the outer peripheral side of the boss member 16, a plurality of (8 in the illustrated example) dovetail grooves 16c, 16c, ... Are provided at equal angular intervals, and the outer peripheral portion of the boss member 16 near the one end in the axial direction is enlarged. An outer flange portion 16d having a smaller diameter than the diameter portion 16a is formed. Each of the illustrated dovetail grooves 16c is a groove having a dovetail-shaped cross section, and is provided so that one end in the longitudinal direction thereof opens to the other end side of the boss member 16.
【００３２】磁石保持部材１７は、図５及び図６にも示
したように、ボス部材１６の外周を隙間なく取り囲むよ
うに環状に形成された周壁部１７ａと、該周壁部１７ａ
の内周から径方向の内側に突出した複数のアリ１７ｃ，
１７ｃ，…とからなっている。磁石保持部材１７の周壁
部１７ａの、アリ１７ｃ，１７ｃ，…相互間に位置する
部分を貫通した状態で、複数の磁石保持孔１７ｄ，１７
ｄ，…が形成され、これらの磁石保持孔１７ｄ，１７
ｄ，…内にそれぞれ板状の永久磁石１８が収容されてい
る。As shown in FIGS. 5 and 6, the magnet holding member 17 has a peripheral wall portion 17a formed in an annular shape so as to surround the outer periphery of the boss member 16 without a gap, and the peripheral wall portion 17a.
A plurality of ants 17c protruding radially inward from the inner circumference of the
17c, ... A plurality of magnet holding holes 17d, 17 are formed in a state where the peripheral wall portion 17a of the magnet holding member 17 penetrates the portions located between the dovetails 17c, 17c, ...
are formed, and these magnet holding holes 17d, 17 are formed.
A plate-shaped permanent magnet 18 is housed in each of d, ....
【００３３】図示の各アリ１７ｃは、アリ溝１６ｃの断
面形状と同様な鳩尾状の断面形状を呈する突起からなっ
ていて、対応するアリ溝１６ｃの軸線方向の一端側の開
口部から該アリ溝１６ｃにきつく嵌合させられるように
なっており、各アリ１７ｃを対応するアリ溝１６ｃに嵌
合させて磁石保持部材１７をボス部材１６の軸線方向に
スライドさせることにより、磁石保持部材１７の周壁部
１７ａをボス部材１６の外周にきつく嵌合させることが
できるようになっている。Each of the dovetails 17c shown in the drawing is composed of a projection having a dovetail-shaped cross-sectional shape similar to that of the dovetail groove 16c, and the dovetail groove is opened from the opening on the one end side in the axial direction of the dovetail groove 16c. 16c, and the dovetails 17c are fitted into the corresponding dovetail grooves 16c, and the magnet holding member 17 is slid in the axial direction of the boss member 16. The portion 17a can be tightly fitted to the outer periphery of the boss member 16.
【００３４】磁石保持部材１７の周壁部１７ａを貫通し
た複数の磁石保持孔１７ｄ，１７ｄ，…は、ボス部材１
６の周方向に等角度間隔で並ぶように設けられ、各磁石
保持孔１７ｄの内面には、各磁石保持孔の断面積をボス
部材の径方向の外側に向うに従って次第に小さくする向
きのテーパが付けられたテーパ部が設けられている。図
示の例では、磁石保持部材１７の周方向（ボス部材の周
方向）に相対する各磁石保持孔１７ｄの内面がテーパ部
１７d1及び１７d1となっている。A plurality of magnet holding holes 17d, 17d, ... Penetrating the peripheral wall portion 17a of the magnet holding member 17 are formed by the boss member 1.
6 are provided so as to be arranged in the circumferential direction of the magnet 6 at equal angular intervals, and the inner surface of each magnet holding hole 17d is tapered so that the cross-sectional area of each magnet holding hole is gradually reduced toward the outer side in the radial direction of the boss member. An attached taper portion is provided. In the illustrated example, the inner surfaces of the magnet holding holes 17d facing the circumferential direction of the magnet holding member 17 (the circumferential direction of the boss member) are tapered portions 17d1 and 17d1.
【００３５】各磁石保持孔１７ｄの内面に接する各永久
磁石１８の側面には、磁石保持孔１７ｄの内面のテーパ
部１７d1，１７d1と同じ方向に傾斜したテーパ部１８a
1，１８a1が設けられ、各永久磁石１８のテーパ部１８a
1，１８a1が磁石保持孔１７ｄのテーパ部１７d1，１７d
1に当接することにより、各永久磁石１８の抜け止めが
図られるようになっている。On the side surface of each permanent magnet 18 in contact with the inner surface of each magnet holding hole 17d, a taper portion 18a inclined in the same direction as the taper portions 17d1 and 17d1 on the inner surface of the magnet holding hole 17d.
1, 18a1 are provided, and the taper portion 18a of each permanent magnet 18 is provided.
1, 18a1 are tapered portions 17d1 and 17d of the magnet holding hole 17d.
By contacting with 1, the permanent magnets 18 are prevented from coming off.
【００３６】図示の例では、各永久磁石１８を対応する
磁石保持孔１７ｄ内に収納して保持させた状態で、各永
久磁石１８の外側の磁極面が磁石保持部材１７の外周面
と同一面上に位置するように、各磁石保持孔１７ｄの深
さ（磁石保持部材１７の周壁部１７ａの厚み）が設定さ
れている。In the illustrated example, the outer magnetic pole surface of each permanent magnet 18 is flush with the outer peripheral surface of the magnet holding member 17 in a state where each permanent magnet 18 is housed and held in the corresponding magnet holding hole 17d. The depth of each magnet holding hole 17d (the thickness of the peripheral wall portion 17a of the magnet holding member 17) is set so as to be located above.
【００３７】磁石保持部材１７を形成する絶縁樹脂材料
としては、耐熱性が高く、衝撃強度及び機械的強度に優
れたもの（例えばＰＰＳ樹脂）を選定するのが好まし
い。As the insulating resin material forming the magnet holding member 17, it is preferable to select a material having high heat resistance and excellent impact strength and mechanical strength (for example, PPS resin).
【００３８】なお磁石保持部材１７のアリ１７ｃ，１７
ｃ，…相互間の間隔は、隣り合うアリ１７ｃ，１７ｃの
間に、永久磁石１８を磁石保持孔１７ｄ内に挿入する際
に必要な隙間を確保するために十分な大きさに設定して
おく。The dovetails 17c, 17 of the magnet holding member 17
The distance between c, ... Is set to a sufficient size to secure a gap required between the adjacent dovetails 17c, 17c when the permanent magnet 18 is inserted into the magnet holding hole 17d. .
【００３９】磁石カバー１９は、ステンレス鋼やアルミ
ニュウムなどの非磁性材料（強磁性材料以外の金属材
料）の薄板を円筒状に成形したものからなっていて、磁
石保持部材１７の外周に隙間なく嵌合するように、その
内径寸法が設定されている。磁石カバー１９は、その軸
線方向の一端側及び他端側にそれぞれ内鍔部１９ａ及び
１９ｂを有していて、該磁石カバーの一端側の内鍔部１
９ａ及び他端側の内鍔部１９ｂがそれぞれボス部材１６
の外周の鍔部１６ｄ及びボス部材１６の軸線方向の他端
側の端面に外側から当接させられて、磁石カバー１９が
ボス部材１６に対して固定されている。The magnet cover 19 is formed by cylindrically molding a thin plate of non-magnetic material (metal material other than ferromagnetic material) such as stainless steel or aluminum, and is fitted to the outer periphery of the magnet holding member 17 without any gap. The inner diameter dimension is set so as to match. The magnet cover 19 has inner flange portions 19a and 19b on one end side and the other end side in the axial direction thereof, and the inner flange portion 1 on one end side of the magnet cover 1
9a and the inner collar portion 19b on the other end side are respectively boss members 16
The magnet cover 19 is fixed to the boss member 16 by being brought into contact with the outer peripheral flange portion 16d and the end surface of the boss member 16 on the other end side in the axial direction from the outside.
【００４０】磁石カバー１９の両端の内鍔部１９ａ，１
９ｂの少なくとも一方は、該磁石カバー１９を磁石保持
部材１７の外周に嵌合させた後にシーミング加工等によ
り形成される。図示の例では、磁石カバー１９を製作す
る際にその軸線方向の他端側の内鍔部１９ｂのみを形成
しておき、磁石カバー１９を磁石保持部材１７の外周に
嵌合させた後に、その軸線方向の一端側の端部にシーミ
ング加工を施して該磁石保持部材の一端をボス部材１６
の鍔部１６ｄに被せるように変形させることにより、内
鍔部１９ａを形成するようにしている。Inner collar portions 19a, 1 at both ends of the magnet cover 19
At least one of 9b is formed by seaming after fitting the magnet cover 19 to the outer periphery of the magnet holding member 17. In the illustrated example, when the magnet cover 19 is manufactured, only the inner flange portion 19b on the other end side in the axial direction is formed, and after the magnet cover 19 is fitted to the outer periphery of the magnet holding member 17, Seaming is applied to the end portion on the one end side in the axial direction to attach one end of the magnet holding member to the boss member 16.
The inner collar portion 19a is formed by deforming so as to cover the collar portion 16d.
【００４１】上記の磁石回転子１１を組み立てる際に
は、図７に示すように、磁石保持部材１７の軸線方向か
らアリ１７ｃ，１７ｃ相互間の隙間を通して、各磁石保
持孔１７ｄ内に永久磁石１８を挿入し、各永久磁石１８
を磁石保持孔１７ｄの内面に接着により固定する。永久
磁石１８と磁石保持孔１７ｄの内面との接着は、永久磁
石１８の側面及び磁石保持孔１７ｄの内面にそれぞれ接
着剤を塗布した後に、永久磁石１８を磁石保持孔１７ｄ
内に挿入することにより行ってもよく、永久磁石１８を
磁石保持孔１７ｄ内に挿入した後に、永久磁石１８の側
面と磁石保持孔１７ｄの内面との間に接着剤を浸透させ
ることにより行ってもよい。When assembling the above magnet rotor 11, as shown in FIG. 7, the permanent magnet 18 is inserted into each magnet holding hole 17d through the gap between the dovetails 17c and 17c from the axial direction of the magnet holding member 17. Insert each permanent magnet 18
Is fixed to the inner surface of the magnet holding hole 17d by adhesion. The permanent magnet 18 and the inner surface of the magnet holding hole 17d are adhered by applying an adhesive to the side surface of the permanent magnet 18 and the inner surface of the magnet holding hole 17d, and then attaching the permanent magnet 18 to the magnet holding hole 17d.
Alternatively, the permanent magnet 18 may be inserted into the magnet holding hole 17d and then the adhesive is permeated between the side surface of the permanent magnet 18 and the inner surface of the magnet holding hole 17d. Good.
【００４２】永久磁石１８を磁石保持孔１７ｄ内に挿入
した後に、永久磁石１８の側面と磁石保持孔１７ｄの内
面との間に接着剤を浸透させることにより永久磁石１８
を磁石保持孔１７ｄの内面に接着する方法をとる場合に
は、磁石保持孔１７ｄの内面の一部、例えば磁石保持孔
１７ｄの各角部に、該磁石保持孔１７ｄの内面と磁石１
８との間の隙間を拡大するポケット部を形成して、該ポ
ケット部内に接着剤を充填するようにすると、接着剤の
浸透を容易にすることができる。After the permanent magnet 18 is inserted into the magnet holding hole 17d, an adhesive is allowed to penetrate between the side surface of the permanent magnet 18 and the inner surface of the magnet holding hole 17d.
In the case of adopting a method of adhering the magnet to the inner surface of the magnet holding hole 17d, a part of the inner surface of the magnet holding hole 17d, for example, at each corner of the magnet holding hole 17d, is attached to the inner surface of the magnet holding hole 17d and the magnet 1.
By forming a pocket portion for enlarging the gap between the pocket portion 8 and 8 and filling the inside of the pocket portion with the adhesive, the penetration of the adhesive can be facilitated.
【００４３】磁石保持部材１７に永久磁石１８を保持さ
せた後、永久磁石１８を保持した磁石保持部材１７のア
リ１７ｃ，１７ｃ，…をボス部材１６のアリ溝１６ｃ，
１６ｃ，…に嵌合させるとともに、磁石保持部材１７の
周壁部１７ａをボス部材１６の外周に嵌合させて、該周
壁部１７ａをボス部材１６の外周の鍔部１６ｄに当接さ
せる。その後、磁石カバー１９を磁石保持部材１７の外
周に嵌合させ、該磁石カバー１９の一端をボス部材１６
の鍔部１６ｄの外面に被せるようにシーミング加工を施
して内鍔部１９ａを形成し、磁石カバー１９をボス部材
１６に固定する。After the permanent magnet 18 is held by the magnet holding member 17, the dovetails 17c, 17c, ... Of the magnet holding member 17 holding the permanent magnet 18 are replaced with the dovetail grooves 16c of the boss member 16.
16c, ..., The peripheral wall portion 17a of the magnet holding member 17 is fitted to the outer periphery of the boss member 16, and the peripheral wall portion 17a is brought into contact with the flange portion 16d on the outer periphery of the boss member 16. After that, the magnet cover 19 is fitted onto the outer periphery of the magnet holding member 17, and one end of the magnet cover 19 is attached to the boss member 16.
The inner cover 19a is formed by performing a seaming process so as to cover the outer surface of the flange 16d, and the magnet cover 19 is fixed to the boss member 16.
【００４４】上記のように、ボス部材１６を取り囲む環
状の磁石保持部材１７に設けた磁石保持孔１７ｄ内に永
久磁石１８を収容して、磁石保持孔１７ｄの内面及び永
久磁石１８の側面にそれぞれテーパ部を設けることによ
り永久磁石１８の抜け止めを図るとともに、絶縁樹脂製
の磁石保持部材１７とボス部材とをアリとアリ溝との嵌
合により結合する構造にすると、磁極片を用いることな
く、またネジやアルミニュウムのモールド部を用いずに
永久磁石をボス部材に強固に固定することができるの
で、コストの低減を図って、しかも遠心力に対する機械
的強度が高い磁石回転子を得ることができる。As described above, the permanent magnet 18 is housed in the magnet holding hole 17d provided in the annular magnet holding member 17 surrounding the boss member 16, and the inner surface of the magnet holding hole 17d and the side surface of the permanent magnet 18 are respectively accommodated. When the permanent magnet 18 is prevented from coming off by providing the tapered portion and the magnet holding member 17 made of the insulating resin and the boss member are coupled by fitting the dovetail and the dovetail groove, the pole piece is not used. In addition, since the permanent magnet can be firmly fixed to the boss member without using a screw or a molded portion of aluminum, it is possible to reduce the cost and obtain a magnet rotor having high mechanical strength against centrifugal force. it can.
【００４５】また上記のようにネジを用いずに永久磁石
１８をボス部材１６に固定するようにすると、振動が加
わった場合に緩む個所がなくなるので、振動に強い磁石
回転子を得ることができる。If the permanent magnet 18 is fixed to the boss member 16 without using screws as described above, there is no place to loosen when vibration is applied, so a vibration-resistant magnet rotor can be obtained. .
【００４６】更に上記のように、絶縁樹脂製の磁石保持
部材１７に永久磁石１８を保持させるようにすると、永
久磁石１８を取り囲む領域に渦電流が流れることがなく
なるので、渦電流損を少なくして、発電効率を高めるこ
とができる上に、磁石回転子からの発熱を少なくするこ
とができる。Further, as described above, when the permanent magnet 18 is held by the magnet holding member 17 made of the insulating resin, the eddy current does not flow in the region surrounding the permanent magnet 18, so that the eddy current loss is reduced. As a result, power generation efficiency can be improved, and heat generation from the magnet rotor can be reduced.
【００４７】また上記の例のように、磁石保持部材１７
の磁石保持孔１７ｄ，１７ｄ，…相互間の境界部にそれ
ぞれアリ１７ｃ，１７ｃ，…を形成するようにすると、
アリとアリ溝との嵌合により各永久磁石１８を強固に押
さえることができるため、磁石回転子の機械的強度を高
くすることができる。Further, as in the above example, the magnet holding member 17
When the dovetails 17c, 17c, ... Are formed at the boundaries between the magnet holding holes 17d, 17d ,.
Since the permanent magnets 18 can be firmly pressed by the fitting of the dovetail and the dovetail groove, the mechanical strength of the magnet rotor can be increased.
【００４８】上記の説明では、磁石保持部材１７を予め
絶縁樹脂により成形しておくようにしたが、外周側にア
リ溝１６ｃ，１６ｃ，…が形成されたボス部材１６の外
周に所定個数の永久磁石１８を等角度間隔で並べて接着
などにより固定した後、該ボス部材１６と永久磁石１８
とを射出成型用金型内にインサートして、該金型内に前
記と同様の性能を有する絶縁樹脂を充填することによ
り、磁石保持部材１７を成形するようにしてもよい。こ
のようにすると、磁石保持部材１７を構成する樹脂がア
リ溝１６ｃ内に密に充填され、該樹脂が永久磁石１８に
密に接するため、磁石回転子の機械的強度を向上させる
ことができる。絶縁樹脂の溶融温度はアルミニュウムの
溶融温度に比べて低いため、上記のように、永久磁石を
ボス部材とともに磁石保持部材成形用の金型内にインサ
ートして磁石保持部材１７を一体成形する方法をとって
も、磁石が減磁することはない。In the above description, the magnet holding member 17 is made of insulating resin in advance. However, a predetermined number of permanent members are formed on the outer circumference of the boss member 16 having the dovetail grooves 16c, 16c, ... After the magnets 18 are arranged at equal angular intervals and fixed by adhesion or the like, the boss member 16 and the permanent magnet 18 are
The magnet holding member 17 may be molded by inserting and into an injection molding die and filling the die with an insulating resin having the same performance as described above. By doing so, the resin forming the magnet holding member 17 is densely filled in the dovetail groove 16c and the resin is in close contact with the permanent magnet 18, so that the mechanical strength of the magnet rotor can be improved. Since the melting temperature of the insulating resin is lower than the melting temperature of aluminum, a method of integrally molding the magnet holding member 17 by inserting the permanent magnet into the mold for molding the magnet holding member together with the boss member as described above is used. The magnet never demagnetizes.
【００４９】また上記のように、磁石カバー１９を取り
付けると、磁石回転子を回転電機に組み込む際に、永久
磁石１８の外面に物が当って該磁石１８が破損するのを
防ぐことができる。また永久磁石１８として希土類磁石
を用いる場合、磁石が外気に触れていると磁石の劣化が
早期に進むおそれがあるが、上記のように磁石カバーを
設けると、永久磁石１８を外気から遮断することができ
るため、該磁石が早期に劣化するのを防ぐことができ
る。Further, by mounting the magnet cover 19 as described above, it is possible to prevent the permanent magnet 18 from being damaged by being hit by an object when the magnet rotor is incorporated in a rotating electric machine. When a rare earth magnet is used as the permanent magnet 18, if the magnet is in contact with the outside air, the magnet may be deteriorated at an early stage. However, if the magnet cover is provided as described above, the permanent magnet 18 is shielded from the outside air. Therefore, it is possible to prevent the magnet from being deteriorated at an early stage.
【００５０】図８は本発明に係わる磁石回転子の他の構
成例を示したもので、この例では、磁石保持部材１７の
周壁部１７ａの軸線方向の一端側の側面の内周寄りの部
分に軸線方向に突出した突起１７ｅが周設されている。
ボス部材１６側には、磁石保持部材１７の突起１７ｅを
嵌合させるための環状の凹部１６ｅが軸線方向に開口し
た状態で設けられ、磁石保持部材１７の突起１７ｅがボ
ス部材１６側に設けられた凹部１６ｅに軸線方向から嵌
合されて磁石保持部材１７の軸線方向の一端がボス部材
１６に拘束されている。FIG. 8 shows another configuration example of the magnet rotor according to the present invention. In this example, a portion of the side wall of the peripheral wall portion 17a of the magnet holding member 17 on the one end side in the axial direction near the inner periphery. A protrusion 17e projecting in the axial direction is circumferentially provided on the.
An annular recess 16e for fitting the protrusion 17e of the magnet holding member 17 is provided on the boss member 16 side in a state of opening in the axial direction, and the protrusion 17e of the magnet holding member 17 is provided on the boss member 16 side. The recess 16e is fitted in the recess 16e from the axial direction, and one end of the magnet holding member 17 in the axial direction is restrained by the boss member 16.
【００５１】またこの例では、磁石保持部材１７に設け
られた各磁石保持孔の４つの内面のうち、ボス部材１６
の軸線方向に相対する１対の内面がテーパ部１７d1，１
７d1となっており、ボス部材１６の軸線方向に相対する
磁石１８の側面にそれぞれ形成されたテーパ部１８a1，
１８a1がテーパ部１７d1，１７d1に当接されている。そ
の他の点は図１ないし図７に示した例と同様に構成され
ている。In this example, the boss member 16 is one of the four inner surfaces of each magnet holding hole provided in the magnet holding member 17.
Of the pair of inner surfaces facing each other in the axial direction of the taper portions 17d1, 1
7d1 and the taper portions 18a1 formed on the side surfaces of the magnet 18 facing each other in the axial direction of the boss member 16,
18a1 is in contact with the tapered portions 17d1 and 17d1. The other points are configured similarly to the example shown in FIGS.
【００５２】図８に示したように、磁石保持部材１７の
周壁部の一端側に設けた突起１７ｅをボス部材１６側に
設けた凹部１６ｅに軸線方向から嵌合させて、磁石保持
部材１７の一端をボス部材１６に拘束するようにする
と、磁石保持部材１７をいっそう強固にボス部材１６に
対して固定することができるため、遠心力により磁石保
持部材１７が外側に膨らむのを更に確実に防いで、磁石
の取り付け強度を高めることができる。As shown in FIG. 8, the protrusion 17e provided on one end side of the peripheral wall portion of the magnet holding member 17 is fitted in the recess 16e provided on the boss member 16 side in the axial direction to form the magnet holding member 17. When the one end is restrained by the boss member 16, the magnet holding member 17 can be more firmly fixed to the boss member 16, so that the magnet holding member 17 can be more surely prevented from bulging outward due to centrifugal force. Thus, the mounting strength of the magnet can be increased.
【００５３】上記の例では、磁石式交流発電機の回転子
として用いる磁石回転子に本発明を適用した場合を例に
とったが、ブラシレス電動機等の他の回転電機に用いる
磁石回転子にも本発明を適用することができる。In the above example, the case where the present invention is applied to the magnet rotor used as the rotor of the magnet type AC generator is taken as an example, but it is also applicable to the magnet rotor used in other rotating electric machines such as brushless motors. The present invention can be applied.
【００５４】[0054]
【発明の効果】以上のように、本発明によれば、ボス部
材を取り囲む環状の磁石保持部材に設けた磁石保持孔内
に永久磁石を収容して、磁石保持孔の内面及び永久磁石
の側面にそれぞれテーパ部を設けることにより永久磁石
の抜け止めを図るとともに、絶縁樹脂製の磁石保持部材
とボス部材とをアリとアリ溝との嵌合により結合する構
造にして、磁極片を用いることなく、またネジやアルミ
ニュウムのモールド部を用いずに永久磁石をボス部材に
強固に固定することができるようにしたので、コストの
低減を図って、しかも遠心力に対する機械的強度が高い
磁石回転子を得ることができる利点がある。特に本発明
においては、磁石保持部材の周壁部の軸線方向の一端側
の側面の内周寄りの部分に軸線方向に突出した突起を設
けるとともに、ボス部材側には、磁石保持部材の突起を
嵌合させるための凹部を軸線方向に開口した状態で設け
て、磁石保持部材の突起をボス部材側に設けられた凹部
にボス部材の軸線方向から嵌合させることにより、磁石
保持部材の軸線方向の一端をボス部材に拘束するように
して、磁石保持部材を強固にボス部材に固定することが
できるようにしたため、遠心力により磁石保持部材が外
側に膨らむのをより確実に防いで、磁石の取り付け強度
を向上させることができる。 As described above, according to the present invention, the permanent magnet is housed in the magnet holding hole provided in the annular magnet holding member surrounding the boss member, and the inner surface of the magnet holding hole and the side surface of the permanent magnet. The permanent magnet is prevented from coming off by providing a taper portion on each of them, and the magnet holding member and the boss member made of an insulating resin are coupled by fitting the dovetail and the dovetail groove, and without using a pole piece. In addition, the permanent magnet can be firmly fixed to the boss member without using screws or aluminum mold parts, thus reducing the cost and using a magnet rotor with high mechanical strength against centrifugal force. There are advantages that can be obtained. Especially the present invention
At one end side in the axial direction of the peripheral wall portion of the magnet holding member
A projection protruding in the axial direction is provided on the inner side of the side of the
At the same time, mount the protrusion of the magnet holding member on the boss side.
Provided with a recess for fitting to be open in the axial direction
The protrusion of the magnet holding member on the boss side
The magnet from the axial direction of the boss member.
Bind one end of the holding member in the axial direction to the boss member
Then, the magnet holding member can be firmly fixed to the boss member.
Since it is possible to remove the magnet holding member from the outside due to centrifugal force.
More surely to prevent bulging to the side, and the mounting strength of the magnet
Can be improved.
【００５５】また本発明によれば、ネジを用いずに永久
磁石をボス部材に固定するので、振動が加わった場合に
緩む個所をなくして、振動に強い磁石回転子を得ること
ができる。Further, according to the present invention, since the permanent magnet is fixed to the boss member without using a screw, it is possible to obtain a magnet rotor which is resistant to vibration by eliminating a portion where it is loosened when vibration is applied.
【００５６】更に本発明によれば、アルミニュウムのモ
ールド部を設けることなく、絶縁樹脂製の磁石保持部材
に永久磁石を保持させる構造とすることにより、永久磁
石を取り囲む領域に渦電流が流れるのを防いで、渦電流
損を少なくすることができるようにしたので、回転電機
の効率を高めることができる上に、磁石回転子からの発
熱を少なくすることができる利点がある。Further, according to the present invention, the permanent magnet is held by the magnet holding member made of the insulating resin without providing the aluminum mold portion, so that the eddy current flows in the region surrounding the permanent magnet. Since it is made possible to reduce the eddy current loss by preventing it, there is an advantage that the efficiency of the rotating electric machine can be improved and the heat generated from the magnet rotor can be reduced.
【００５７】また本発明によれば、磁極片を必要としな
いため、磁石回転子の軽量化を容易に図ることができ、
回転子の慣性モーメントを小さくする要求に容易に応え
ることができる。Further, according to the present invention, since the magnetic pole pieces are not required, it is possible to easily reduce the weight of the magnet rotor,
It is possible to easily meet the demand for reducing the moment of inertia of the rotor.
【図１】本発明に係わる磁石回転子を用いた磁石式交流
発電機の構成例を示した正面図である。FIG. 1 is a front view showing a configuration example of a magnet type AC generator using a magnet rotor according to the present invention.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】本発明に係わる磁石回転子の半部を断面して示
した正面図である。FIG. 3 is a front view showing a half portion of a magnet rotor according to the present invention in section.
【図４】図３のＢ−Ｂ線断面図である。FIG. 4 is a sectional view taken along line BB of FIG.
【図５】本発明の磁石回転子で用いる磁石保持部材の正
面図である。FIG. 5 is a front view of a magnet holding member used in the magnet rotor of the present invention.
【図６】図５のＣ−Ｃ線断面図である。6 is a cross-sectional view taken along the line CC of FIG.
【図７】本発明で用いる磁石保持部材と該磁石保持部材
により保持される永久磁石とを示した斜視図である。FIG. 7 is a perspective view showing a magnet holding member used in the present invention and a permanent magnet held by the magnet holding member.
【図８】本発明に係わる磁石回転子の他の構成例を示し
た断面図である。FIG. 8 is a cross-sectional view showing another configuration example of the magnet rotor according to the present invention.
【図９】（Ａ）は従来の磁石回転子を示した正面図、
（Ｂ）は（Ａ）のＤ−Ｄ線断面図である。FIG. 9A is a front view showing a conventional magnet rotor,
(B) is the DD sectional view taken on the line of (A).
１１ 磁石回転子 １６ ボス部材 １６ｂ テーパ孔 １６ｃ アリ溝 １７ 磁石保持部材 １７ａ 周壁部 １７ｃ アリ １７ｄ 磁石保持孔 １７d1 テーパ部 １８ 永久磁石 １８a1 テーパ部 １９ 磁石カバー 11 Magnet rotor 16 Boss member 16b taper hole 16c dovetail 17 Magnet holding member 17a peripheral wall 17c ant 17d Magnet holding hole 17d1 taper 18 permanent magnet 18a1 taper 19 magnet cover
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 1/27 Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H02K 1/27
Claims (3)
合させるための孔を内側に有し、周方向に間隔をあけて
並ぶ複数のアリ溝を外周側に有する筒状のボス部材と、 前記ボス部材の外周を取り囲むように環状に形成された
周壁部と、該周壁部の内周部の前記複数のアリ溝にそれ
ぞれ対応する位置から径方向の内側に突出した複数のア
リとを有して、各アリが前記ボス部材の対応するアリ溝
に嵌合されて前記ボス部材に固定され、前記周壁部には
前記ボス部材の周方向に等角度間隔で並ぶ複数の磁石保
持孔が該周壁部を貫通した状態で形成されている絶縁樹
脂製の磁石保持部材と、 前記磁石保持部材の複数の磁石保持孔内にそれぞれ収容
されて前記ボス部材の径方向に着磁された複数の板状の
永久磁石とを具備し、 前記各磁石保持孔の内面には、各磁石保持孔の断面積を
前記ボス部材の径方向の外側に向うに従って次第に小さ
くする向きのテーパが付けられたテーパ部が設けられ、 前記各磁石保持孔の内面に接する各永久磁石の側面に
は、前記磁石保持孔の内面のテーパ部と同じ方向に傾斜
したテーパ部が設けられ、 前記磁石保持部材の周壁部の軸線方向の一端側の側面の
内周寄りの部分に軸線方向に突出した突起が設けられ、 前記ボス部材側には、前記磁石保持部材の突起を嵌合さ
せるための凹部が軸線方向に開口した状態で設けられ、 前記磁石保持部材の突起が前記ボス部材側に設けられた
凹部に前記ボス部材の軸線方向から嵌合されて前記磁石
保持部材の軸線方向の一端が前記ボス部材に拘束されて
いる ことを特徴とする回転電機用磁石回転子。1. A cylindrical boss member made of a ferromagnetic material, having a hole for fitting a rotating shaft therein, and a plurality of dovetail grooves arranged at intervals in the circumferential direction on the outer peripheral side. And a peripheral wall portion formed in an annular shape so as to surround the outer periphery of the boss member, and a plurality of ants protruding inward in the radial direction from positions corresponding to the plurality of dovetail grooves of the inner peripheral portion of the peripheral wall portion, respectively. A plurality of magnet holding holes, each of which is fitted into a corresponding dovetail groove of the boss member and fixed to the boss member, and in which the peripheral wall portion is arranged at equal angular intervals in the circumferential direction of the boss member. And a magnet holding member made of an insulating resin formed in a state of penetrating the peripheral wall portion, and a plurality of magnet holding members housed in a plurality of magnet holding holes of the magnet holding member and magnetized in the radial direction of the boss member. And a plate-shaped permanent magnet of Is provided with a tapered portion in which the cross-sectional area of each magnet holding hole is gradually reduced toward the outer side in the radial direction of the boss member, and the tapered portion of each permanent magnet contacting the inner surface of each magnet holding hole is provided. The side surface is provided with a taper portion that is inclined in the same direction as the taper portion of the inner surface of the magnet holding hole, and the side surface of one side in the axial direction of the peripheral wall portion of the magnet holding member is provided .
A protrusion projecting in the axial direction is provided in the portion near the inner circumference, and the protrusion of the magnet holding member is fitted to the boss member side.
The recess for allowing the recess is provided in the state of opening in the axial direction, and the protrusion of the magnet holding member is provided on the boss member side.
The magnet is fitted into the recess from the axial direction of the boss member.
One end of the holding member in the axial direction is restrained by the boss member.
A magnet rotor for a rotating electric machine, which is characterized in that
し、周方向に間隔をあけて並ぶ複数のアリ溝を外周部に
有する筒状のボス部材と、 前記ボス部材の外周を取り囲むように環状に形成された
周壁部と、該周壁部の内周部の前記複数のアリ溝にそれ
ぞれ対応する位置から径方向の内側に突出した複数のア
リとを有して、各アリが前記ボス部材の対応するアリ溝
に嵌合されて前記ボス部材に固定され、前記周壁部には
前記ボス部材の周方向に等角度間隔で並ぶ複数の磁石保
持孔が該周壁部を貫通した状態で形成されている絶縁樹
脂製の磁石保持部材と、 前記磁石保持部材の複数の磁石保持孔内にそれぞれ収容
されて前記ボス部材の径方向に着磁された複数の板状の
永久磁石と、 前記複数の永久磁石の外側の磁極面を前記磁石保持部材
とともに覆うように環状に形成されて前記ボス部材に固
定された非磁性磁石カバーとを具備し、 前記各磁石保持孔の内面には、各磁石保持孔の断面積を
前記ボス部材の径方向の外側に向うに従って次第に小さ
くする向きのテーパが付けられたテーパ部が設けられ、 前記各磁石保持孔の内面に接する各永久磁石の側面に
は、前記磁石保持孔の内面のテーパ部と同じ方向に傾斜
したテーパ部が設けられ、 前記磁石保持部材の周壁部の軸線方向の一端側の側面の
内周寄りの部分に軸線方向に突出した突起が設けられ、 前記ボス部材側には、前記磁石保持部材の突起を嵌合さ
せるための凹部が軸線方向に開口した状態で設けられ、 前記磁石保持部材の突起が前記ボス部材側に設けられた
凹部に前記ボス部材の軸線方向から嵌合されて前記磁石
保持部材の軸線方向の一端が前記ボス部材に拘束されて
いる ことを特徴とする回転電機用磁石回転子。2. A cylindrical boss member having a hole for fitting a rotary shaft therein and having a plurality of dovetail grooves arranged at intervals in the circumferential direction on an outer peripheral portion, and an outer periphery of the boss member. Each of the ants has a peripheral wall portion formed in an annular shape so as to surround it, and a plurality of ants protruding radially inward from positions corresponding to the plurality of dovetail grooves of the inner peripheral portion of the peripheral wall portion, respectively. A state in which a plurality of magnet holding holes are fitted in corresponding dovetail grooves of the boss member and fixed to the boss member, and a plurality of magnet holding holes lined up at equal angular intervals in the circumferential direction of the boss member penetrate the peripheral wall portion. And a plurality of plate-shaped permanent magnets that are housed in a plurality of magnet holding holes of the magnet holding member and are magnetized in the radial direction of the boss member, respectively. Outer magnetic pole surfaces of the plurality of permanent magnets together with the magnet holding member A non-magnetic magnet cover formed in a ring shape so as to cover and fixed to the boss member, wherein the inner surface of each magnet holding hole has a cross-sectional area of each magnet holding hole outside in the radial direction of the boss member. Is provided with a taper portion that tapers in a direction that gradually decreases as it goes to the side surface of each permanent magnet that contacts the inner surface of each magnet holding hole, and is inclined in the same direction as the taper portion of the inner surface of the magnet holding hole. The tapered portion is provided, and the side surface of the circumferential wall of the magnet holding member on the one end side in the axial direction is formed.
A protrusion projecting in the axial direction is provided in the portion near the inner circumference, and the protrusion of the magnet holding member is fitted to the boss member side.
The recess for allowing the recess is provided in the state of opening in the axial direction, and the protrusion of the magnet holding member is provided on the boss member side.
The magnet is fitted into the recess from the axial direction of the boss member.
One end of the holding member in the axial direction is restrained by the boss member.
A magnet rotor for a rotating electric machine, which is characterized in that
周部に外鍔部が形成されて該外鍔部に前記磁石保持部材
の軸線方向の一端が当接され、 前記磁石保持部材は、前記ボス部材の外鍔部と前記ボス
部材の軸線方向の他端との間の距離にほぼ等しい幅寸法
を有するように形成されて、前記磁石保持部材の軸線方
向の他端が前記ボス部材の軸線方向の他端とほぼ同じ位
置に配置され、 前記磁石カバーは、その軸線方向の一端側及び他端側に
それぞれ内鍔部を有して、該磁石カバーの一端側の内鍔
部及び他端側の内鍔部がそれぞれ前記ボス部材の外周の
鍔部及びボス部材の他端側の端面に外側から当接した状
態で前記磁石カバーが前記ボス部材に対して固定されて
いる請求項２に記載の回転電機用磁石回転子。3. An outer flange portion is formed on an outer peripheral portion of the boss member near one end in the axial direction, and one end of the magnet holding member in the axial direction is brought into contact with the outer flange portion, and the magnet holding member is The magnet holder is formed so as to have a width dimension substantially equal to the distance between the outer collar portion of the boss member and the other end of the boss member in the axial direction, and the other end of the magnet holding member in the axial direction of the boss member is formed. The magnet cover is arranged at substantially the same position as the other end in the axial direction, and the magnet cover has inner flange portions on one end side and the other end side in the axial direction, respectively. 3. The magnet cover is fixed to the boss member in a state where the inner flange portion on the end side is in contact with the outer flange portion on the outer periphery of the boss member and the end surface on the other end side of the boss member from the outside, respectively. The magnet rotor for a rotating electric machine according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04147598A JP3397119B2 (en) | 1998-02-24 | 1998-02-24 | Magnet rotor for rotating electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04147598A JP3397119B2 (en) | 1998-02-24 | 1998-02-24 | Magnet rotor for rotating electric machines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11243654A JPH11243654A (en) | 1999-09-07 |
| JP3397119B2 true JP3397119B2 (en) | 2003-04-14 |
Family
ID=12609395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04147598A Expired - Fee Related JP3397119B2 (en) | 1998-02-24 | 1998-02-24 | Magnet rotor for rotating electric machines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3397119B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020020543A (en) * | 2000-09-09 | 2002-03-15 | 김학용 | Rotor preventing magnetization of rotor shaft, and the method of making the rotor |
| JP5072734B2 (en) * | 2008-06-26 | 2012-11-14 | 三菱電機株式会社 | Permanent magnet type rotating electric machine and power steering device |
| DE102008063045A1 (en) * | 2008-12-23 | 2010-07-01 | Aerodyn Energiesysteme Gmbh | synchronous machine |
| JP5493675B2 (en) | 2009-02-09 | 2014-05-14 | 株式会社ジェイテクト | Electric motor and rotor |
| JP5842365B2 (en) * | 2011-04-02 | 2016-01-13 | 日本電産株式会社 | Rotor unit, rotating electric machine, and method of manufacturing rotor unit |
| JP5772330B2 (en) * | 2011-07-19 | 2015-09-02 | マツダ株式会社 | Permanent magnet motor and method for manufacturing rotor part of permanent magnet motor |
| JP6220544B2 (en) * | 2013-04-18 | 2017-10-25 | 日立オートモティブシステムズ株式会社 | motor |
| CN110739787B (en) * | 2018-07-20 | 2022-04-12 | 广东德昌电机有限公司 | Motor and rotor thereof |
| JP6738395B2 (en) * | 2018-11-15 | 2020-08-12 | セイコーインスツル株式会社 | Rotor |
| CN116707180A (en) * | 2022-02-28 | 2023-09-05 | 重庆美的通用制冷设备有限公司 | Rotor, motor and compressor |
-
1998
- 1998-02-24 JP JP04147598A patent/JP3397119B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11243654A (en) | 1999-09-07 |
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