JP2012070585A - Rotor for rotary electric machine - Google Patents

Rotor for rotary electric machine Download PDF

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JP2012070585A
JP2012070585A JP2010214903A JP2010214903A JP2012070585A JP 2012070585 A JP2012070585 A JP 2012070585A JP 2010214903 A JP2010214903 A JP 2010214903A JP 2010214903 A JP2010214903 A JP 2010214903A JP 2012070585 A JP2012070585 A JP 2012070585A
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rotor
rotor core
end plate
fixed
fitted
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JP5631133B2 (en
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Naoteru Tanaka
直輝 田中
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Keihin Corp
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Keihin Corp
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Abstract

PROBLEM TO BE SOLVED: To easily fix a metallic tube to a rotor core while damage of a magnet is prevented in a rotor for rotary electric machine including: a rotor core through which a rotor shaft passes and which is fixed to the rotor shaft; a plurality of magnets arranged in a plurality of places by leaving an equal interval in a circumferential direction of an outer periphery of the rotor core; and the metallic tube which has a cylindrical portion engaging the magnets and is fixed to the rotor core.SOLUTION: A metallic tube 40 integrally has a flange portion 40b extended to an inner side in a radial direction from one end of a cylindrical portion 40a. A tip portion of the flange portion 40b is sandwiched between an end plate 42 which is press-fitted to a rotor shaft 8 by bringing it close to/making it face one end in an axial direction of a rotor core 38. Thus, the metallic tube 40 is fixed to the rotor core 38.

Description

本発明は、ロータシャフトを貫通せしめて該ロータシャフトに固定されるロータコアと、該ロータコアの外周の周方向に等間隔をあけた複数箇所に配置される複数の磁石と、それらの磁石を嵌合せしめる円筒部を有して前記ロータコアに固定される金属管とを備える回転電機用ロータに関する。   The present invention includes a rotor core that passes through a rotor shaft and is fixed to the rotor shaft, a plurality of magnets that are arranged at a plurality of positions at equal intervals in the circumferential direction of the outer periphery of the rotor core, and the magnets are fitted to each other The present invention relates to a rotor for a rotating electrical machine including a metal tube that has a caulking cylindrical portion and is fixed to the rotor core.

ロータの回転時の遠心力によって磁石がロータコアの外周から飛散しないようにするために、ロータコアの外周に配置される複数の磁石を嵌合せしめる円筒部を有する金属管が、ロータコアに固定されるようにしたものが、特許文献１で知られている。   In order to prevent the magnets from scattering from the outer periphery of the rotor core due to centrifugal force when the rotor rotates, a metal tube having a cylindrical portion into which a plurality of magnets arranged on the outer periphery of the rotor core are fitted is fixed to the rotor core. This is known from Patent Document 1.

特開平５−３４４６６９号公報JP-A-5-344669

上記特許文献１で開示されたものでは、金属管が備える円筒部の一端が半径方向内方に折り曲げ成形されることで、前記円筒部の一端から半径方向内方に張り出す鍔部が前記円筒部を一体に設けられており、ロータコアの一端に当接、固定された端板もしくはロータコアの一端に鍔部を当接係合せしめた状態の円筒部の他端を半径方向内方に折り曲げて、前記ロータコアの他端に当接、固定された他の端板にかしめ係合せしめることによって、円筒部の他端のかしめ時の加圧力が磁石に直接及ばないようにして、磁石の破損を抑制している。   In the one disclosed in Patent Document 1, one end of a cylindrical portion included in a metal tube is bent inward in the radial direction, so that a flange portion protruding radially inward from one end of the cylindrical portion is the cylinder. The other end of the cylindrical portion in a state in which the flange portion is in contact with and engaged with one end of the rotor core and the end of the rotor core is bent inward in the radial direction. The other end of the rotor core is brought into contact with and fixed to the other end plate by caulking, so that the applied pressure at the other end of the cylindrical portion does not directly reach the magnet, and the magnet is damaged. Suppressed.

しかるにかしめ時の加圧力が磁石に及ぶのを完全に無くすことは困難であり、かしめ力の大きさ、端板の厚み如何によっては磁石の破損が生じる虞がある。端板の厚みを増大すれば磁石破損の虞は減少するが、そうすればロータの大型化を招いてしまう。而して磁石破損がなくかつ金属管を確実に固定するには、最適なかしめ力の範囲をピンポイントで見出し、その範囲内での加工を維持する必要があり、煩雑な作業および厳しい加工条件が必要となる。   However, it is difficult to completely eliminate the pressure applied during caulking on the magnet, and the magnet may be damaged depending on the level of caulking force and the thickness of the end plate. Increasing the thickness of the end plate reduces the risk of magnet breakage, but doing so will increase the size of the rotor. Thus, in order to securely fix the metal tube without damage to the magnet, it is necessary to pinpoint the optimum caulking force range and maintain the machining within that range. Is required.

本発明は、かかる事情に鑑みてなされたものであり、磁石破損の虞が無いようにしつつ金属管を容易にロータコアに固定し得るようにした回転電機用ロータを提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rotor for a rotating electrical machine in which a metal tube can be easily fixed to a rotor core while preventing the possibility of magnet breakage.

上記目的を達成するために、本発明は、ロータシャフトを貫通せしめて該ロータシャフトに固定されるロータコアと、該ロータコアの外周の周方向に等間隔をあけた複数箇所に配置される複数の磁石と、それらの磁石を嵌合せしめる円筒部を有して前記ロータコアに固定される金属管とを備える回転電機用ロータにおいて、前記金属管は、前記円筒部の一端から半径方向内方側に張り出す鍔部を一体に有し、前記ロータコアの軸方向一端に近接、対向して前記ロータシャフトに圧入される端板と、前記ロータコアとの間に前記鍔部の先端部が挟持されることで前記金属管が前記ロータコアに固定されることを第１の特徴とする。   In order to achieve the above object, the present invention provides a rotor core that passes through a rotor shaft and is fixed to the rotor shaft, and a plurality of magnets that are arranged at a plurality of locations at equal intervals in the circumferential direction of the outer periphery of the rotor core. And a metal pipe having a cylindrical portion into which the magnets are fitted and fixed to the rotor core, the metal pipe extends radially inward from one end of the cylindrical portion. A flange part to be integrated is provided, and a tip part of the collar part is sandwiched between the rotor core and an end plate that is press-fitted into the rotor shaft so as to be close to and opposed to one end in the axial direction of the rotor core. A first feature is that the metal tube is fixed to the rotor core.

また本発明は、第１の特徴の構成に加えて、前記端板が磁性材から成ることを第２の特徴とする。   In addition to the configuration of the first feature, the present invention has a second feature that the end plate is made of a magnetic material.

さらに本発明は、第１または第２の特徴の構成に加えて、前記端板との間に前記ロータコアを挟む他の端板が前記ロータシャフトに圧入されることを第３の特徴とする。   Furthermore, the present invention has a third feature that, in addition to the configuration of the first or second feature, another end plate sandwiching the rotor core with the end plate is press-fitted into the rotor shaft.

本発明の第１の特徴によれば、ロータコアの軸方向一端に近接、対向してロータシャフトに圧入される端板と、ロータコアとの間に、金属管の円筒部の一端から半径方向内方に張り出す鍔部の先端部が挟持されるので、ロータコアの外周の磁石に、金属管をロータコアに固定するための力の一部が作用することがないようにして、金属管を容易にかつ確実にロータコアに固定することができる。   According to the first aspect of the present invention, a radially inward direction from one end of the cylindrical portion of the metal tube between the rotor core and an end plate that is press-fitted into the rotor shaft close to and opposite one end of the rotor core in the axial direction. Since the tip of the flange portion that projects over is clamped, a part of the force for fixing the metal tube to the rotor core does not act on the magnet on the outer periphery of the rotor core so that the metal tube can be easily and It can be securely fixed to the rotor core.

また本発明の第２の特徴によれば、端板が磁性材から成ることによって、磁石から出る磁束の一部が端板を介して短絡することになり、ロータの軸方向に磁束が漏れることが抑制され、回転電機に隣接した他の機器に漏れ磁束による影響が及ぶことを抑制することができる。   According to the second feature of the present invention, since the end plate is made of a magnetic material, a part of the magnetic flux emitted from the magnet is short-circuited through the end plate, and the magnetic flux leaks in the axial direction of the rotor. And the influence of leakage magnetic flux on other equipment adjacent to the rotating electrical machine can be suppressed.

さらに本発明の第３の特徴によれば、ロータコアがロータシャフトに圧入される２つの端板間に挟持されるので、ロータコアのロータシャフトからの抜け出しを確実に防止することができる。   Furthermore, according to the third feature of the present invention, since the rotor core is sandwiched between the two end plates press-fitted into the rotor shaft, it is possible to reliably prevent the rotor core from coming out of the rotor shaft.

ブラシレスモータの縦断面図である。It is a longitudinal cross-sectional view of a brushless motor. 図１の２−２線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG. 図１の３矢示部拡大図である。FIG. 3 is an enlarged view of a portion indicated by an arrow 3 in FIG. 1.

以下、本発明の実施の形態について、添付の図１〜図３を参照しながら説明すると、先ず図１において、回転電機であるブラシレスモータは、モータケース５で回転自在に支承されたロータシャフト８に設けられるロータ９と、該ロータ９を囲繞するようにして前記モータケース５に固定されるステータ１０とを備える。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. First, in FIG. 1, a brushless motor, which is a rotating electrical machine, is a rotor shaft 8 that is rotatably supported by a motor case 5. And a stator 10 fixed to the motor case 5 so as to surround the rotor 9.

前記モータケース５は、軸方向一端を開放するとともに端壁６ａを軸方向他端に有して有底円筒状に形成されるケース主体６と、該ケース主体６の一端開口部を閉じるようにして前記ケース主体６に複数のねじ部材１１…で締結される蓋部材７とで構成される。前記蓋部材７には第１支持孔１２が設けられ、ケース主体６の前記端壁６ａには第１支持孔１２と同軸の第２支持孔１３が設けられており、前記ロータシャフト８は第１および第２支持孔１２，１３を貫通する。しかも第１支持孔１２の内周およびロータシャフト８の外周間には、第１ボールベアリング１４と、第１ボールベアリング１４よりも軸方向外方に配置される環状の第１シール部材１５とが介装され、第２支持孔１３の内周およびロータシャフト８の外周間には、第２ボールベアリング１６が介設される。   The motor case 5 has one end in the axial direction open and an end wall 6a at the other end in the axial direction so as to close the case main body 6 formed in a bottomed cylindrical shape, and one end opening of the case main body 6. And a lid member 7 fastened to the case main body 6 by a plurality of screw members 11. The lid member 7 is provided with a first support hole 12, the end wall 6a of the case body 6 is provided with a second support hole 13 coaxial with the first support hole 12, and the rotor shaft 8 is The first and second support holes 12 and 13 are penetrated. In addition, between the inner periphery of the first support hole 12 and the outer periphery of the rotor shaft 8, there are a first ball bearing 14 and an annular first seal member 15 disposed axially outward from the first ball bearing 14. A second ball bearing 16 is interposed between the inner periphery of the second support hole 13 and the outer periphery of the rotor shaft 8.

前記ケース主体６の端壁６ａには、カバー１７が複数のねじ部材１８…で締結される。前記カバー１７および前記モータケース５間で前記ロータシャフト８にはレゾルバ２０の一部を構成するレゾルバ用ロータ２１が固定され、レゾルバ用ロータ２１とともにレゾルバ２０を構成するレゾルバ用ステータ２２は、前記レゾルバ用ロータ２１を囲繞してホルダ２３に固定される。このホルダ２３は前記端壁６ａおよび前記カバー１７間に挟持され、ホルダ２３および端壁６ａ間には環状の第２シール部材２４が介装され、前記ホルダ２３および前記カバー１７間には環状の第３シール部材２５が介装される。   A cover 17 is fastened to the end wall 6 a of the case main body 6 by a plurality of screw members 18. A resolver rotor 21 that constitutes a part of the resolver 20 is fixed to the rotor shaft 8 between the cover 17 and the motor case 5, and the resolver stator 22 that constitutes the resolver 20 together with the resolver rotor 21 includes the resolver 20. The rotor 21 is surrounded and fixed to the holder 23. The holder 23 is sandwiched between the end wall 6a and the cover 17, an annular second seal member 24 is interposed between the holder 23 and the end wall 6a, and an annular second seal member 24 is interposed between the holder 23 and the cover 17. A third seal member 25 is interposed.

前記ブラシレスモータのステータ１０は、複数の鋼板が積層されて成るとともに前記モータケース５のケース主体６に複数のボルト２６…による締結によって固着されるステータコア２７と、該ステータコア２７に装着される合成樹脂製のボビン２８と、Ｙ結線で結ばれるようにして前記ボビン２８に巻き掛けられるＵ相、Ｖ相およびＷ相のコイル２９…とで構成される。   A stator 10 of the brushless motor includes a stator core 27 formed by laminating a plurality of steel plates and fixed to the case main body 6 of the motor case 5 by a plurality of bolts 26... And a synthetic resin attached to the stator core 27. And a U-phase, V-phase, and W-phase coil 29 wound around the bobbin 28 so as to be connected by a Y connection.

而してＵ相、Ｖ相およびＷ相のコイル２９…は、前記ステータ１０の周方向に等間隔をあけた位置で前記ボビン２８に順次巻装されており、それらの各相のコイル２９…に電力を供給するための給電ユニット３０が、前記ケース主体６および前記蓋部材７間に挟持される。   Thus, the U-phase, V-phase, and W-phase coils 29 are sequentially wound around the bobbin 28 at equally spaced positions in the circumferential direction of the stator 10, and the coils 29 of the respective phases. A power supply unit 30 for supplying electric power to the case main body 6 is sandwiched between the case main body 6 and the lid member 7.

前記給電ユニット３０は、Ｕ相、Ｖ相およびＷ相のコイル２９…の一端側のコイル端末がそれぞれ個別的に接続されるＵ相用の導電部材３１、Ｖ相用の導電部材３２およびＷ相用の導電部材３３と、Ｕ相、Ｖ相およびＷ相のコイル２９…の他端側のコイル端末が共通に接続される中性点用の導電部材３４と、それらの導電部材３１〜３４の一部を埋封せしめる樹脂製の被覆部材３５とで構成されるものであり、前記各導電部材３１〜３４は金属製である。   The power supply unit 30 includes a U-phase conductive member 31, a V-phase conductive member 32, and a W-phase to which coil terminals on one end side of the U-phase, V-phase, and W-phase coils 29 are individually connected. Conductive member 33 for neutral point, conductive member 34 for neutral point to which coil terminals on the other end side of U-phase, V-phase and W-phase coils 29... Are connected in common, and conductive members 31 to 34. Each of the conductive members 31 to 34 is made of a metal.

前記給電ユニット３０の被覆部材３５および前記ケース主体６間には環状の第４シール部材３６が介装され、前記給電ユニット３０の被覆部材３５および前記蓋部材７間には環状の第５シール部材３７が介装される。   An annular fourth seal member 36 is interposed between the covering member 35 of the power supply unit 30 and the case main body 6, and an annular fifth seal member is interposed between the covering member 35 of the power supply unit 30 and the lid member 7. 37 is interposed.

図２を併せて参照して、ロータ９は、ロータシャフト８を貫通せしめて該ロータシャフト８に固定されるロータコア３８と、該ロータコア３８の外周の周方向に等間隔をあけた複数箇所（この実施の形態では周方向に等間隔をあけた６箇所）に配置される複数の磁石３９，３９…と、それらの磁石３９，３９…をたとえば圧入等によって嵌合せしめる円筒部４０ａを有して前記ロータコア３８に固定される金属管４０とを備える。   Referring also to FIG. 2, the rotor 9 includes a rotor core 38 that passes through the rotor shaft 8 and is fixed to the rotor shaft 8, and a plurality of locations (this is spaced apart in the circumferential direction of the outer periphery of the rotor core 38. In the embodiment, there are provided a plurality of magnets 39, 39... Arranged at equal intervals in the circumferential direction) and a cylindrical portion 40a for fitting these magnets 39, 39. And a metal tube 40 fixed to the rotor core 38.

前記ロータコア３８は、複数の鋼板が積層されて成るものであり、このロータコア３８の外周の周方向に等間隔をあけた６箇所には、軸方向に延びる凹部４１，４１…が形成され、前記磁石３９，３９…の一部はそれらの凹部４１，４１…に嵌合される。   The rotor core 38 is formed by laminating a plurality of steel plates, and recessed portions 41, 41... Extending in the axial direction are formed at six positions spaced at equal intervals in the circumferential direction of the outer periphery of the rotor core 38. A part of the magnets 39, 39... Are fitted into the recesses 41, 41.

図３を併せて参照して、前記金属管４０は、前記円筒部４０ａの一端から半径方向内方側に張り出すとともに先端部を前記ロータコア３８の軸方向一端面に当接せしめる鍔部４０ｂを一体に有しており、その鍔部４０ｂには、前記ロータシャフト８の軸線を含む縦断面では前記円筒部４０ａの一端から軸方向外方に膨らんだ曲面部分４０ｂａが設けられ、該曲面部分４０ｂａは、前記ロータコア３８の軸方向一端面３８ａよりも軸方向外方に突出して形成される。   Referring also to FIG. 3, the metal tube 40 has a flange portion 40 b that projects radially inward from one end of the cylindrical portion 40 a and makes the tip end abut against one end surface in the axial direction of the rotor core 38. The flange portion 40b is provided with a curved surface portion 40ba that swells axially outward from one end of the cylindrical portion 40a in a longitudinal section including the axis of the rotor shaft 8, and the curved surface portion 40ba. Is formed so as to protrude outward in the axial direction from the axial end surface 38a of the rotor core 38.

また前記ロータシャフト８の軸線に直交する平面に沿う平面部分４０ｂｂが、前記曲面部分４０ｂａに連なって前記鍔部４０ｂの先端部に形成されており、その平面部分４０ｂｂが前記ロータコア３８の軸方向一端面３８ａに当接する。   A plane portion 40bb extending along a plane orthogonal to the axis of the rotor shaft 8 is formed at the tip of the flange portion 40b so as to continue to the curved surface portion 40ba, and the plane portion 40bb is the same in the axial direction of the rotor core 38. It contacts the end surface 38a.

前記ロータシャフト８には、前記ロータコア３８の一端に近接、対向する第１端板４２と、第１端板４２との間に前記ロータコア３８を挟む第２端板４３とが圧入される。而して第１および第２端板４２，４３は、その中央部に短円筒部４２ａ，４３ａを一体に有するようにして磁性材料によって形成されるものであり、短円筒部４２ａ，４３ａにロータシャフト８が圧入される。   A first end plate 42 that is close to and faces one end of the rotor core 38 and a second end plate 43 that sandwiches the rotor core 38 between the first end plate 42 are press-fitted into the rotor shaft 8. Thus, the first and second end plates 42 and 43 are formed of a magnetic material so as to integrally have the short cylindrical portions 42a and 43a at the central portions thereof, and the short cylindrical portions 42a and 43a are provided with a rotor. The shaft 8 is press-fitted.

しかも第１端板４２と、前記ロータコア３８の軸方向一端面３８ａとの間に金属管４０における鍔部４０ｂの先端部すなわち平面部分４０ｂｂが挟持され、それによってロータコア３８がロータシャフト８に固定される。   Moreover, the tip end portion of the flange portion 40b of the metal tube 40, that is, the flat portion 40bb, is sandwiched between the first end plate 42 and the one axial end surface 38a of the rotor core 38, whereby the rotor core 38 is fixed to the rotor shaft 8. The

本発明の実施の形態の作用について説明すると、該ロータコア３８の外周の周方向に等間隔をあけた複数箇所に配置される複数の磁石３９，３９…を嵌合せしめる円筒部４０ａを有する金属管４０は、前記円筒部４０ａの一端から半径方向内方側に張り出す鍔部４０ｂを一体に有し、前記ロータコア３８の一端に近接、対向して前記ロータシャフトに圧入される第１端板４２と、前記ロータコア３８との間に前記鍔部４０ｂの先端部が挟持されることで前記金属管４０が前記ロータコア３８に固定されるので、ロータコア３８の外周の磁石３９，３９…に、金属管４０をロータコア３８に固定するための力の一部が作用することがないようにして、金属管４０を容易にかつ確実にロータコア３８に固定することができる。   The operation of the embodiment of the present invention will be described. A metal tube having a cylindrical portion 40a into which a plurality of magnets 39, 39... Arranged at a plurality of positions spaced at equal intervals in the circumferential direction of the outer periphery of the rotor core 38 are fitted. Reference numeral 40 denotes a first end plate 42 that integrally has a flange 40b that projects radially inward from one end of the cylindrical portion 40a, and that is press-fitted into the rotor shaft close to and opposite one end of the rotor core 38. The metal tube 40 is fixed to the rotor core 38 by sandwiching the tip of the flange portion 40b between the rotor core 38 and the rotor core 38. The metal tube 40 can be easily and reliably fixed to the rotor core 38 so that a part of the force for fixing the 40 to the rotor core 38 does not act.

また第１端板４２が磁性材から成るので、磁石３９，３９…から出る磁束の一部が第１端板４２を介して短絡することになり、ロータ９の軸方向に磁束が漏れることが抑制され、ブラシレスモータに隣接したレゾルバ２０等の機器に漏れ磁束による影響が及ぶことを抑制することができる。   Further, since the first end plate 42 is made of a magnetic material, a part of the magnetic flux emitted from the magnets 39, 39... Is short-circuited via the first end plate 42, and the magnetic flux leaks in the axial direction of the rotor 9. It is suppressed, and it is possible to suppress the influence of leakage magnetic flux on devices such as the resolver 20 adjacent to the brushless motor.

また第１端板４２との間に前記ロータコア３８を挟む第２端板４３が前記ロータシャフト８に圧入されるので、ロータコア３８がロータシャフト８に圧入される２つの端板４２，４３間に挟持されることになり、ロータコア３８のロータシャフト８からの抜け出しを確実に防止することができる。   Since the second end plate 43 sandwiching the rotor core 38 between the first end plate 42 is press-fitted into the rotor shaft 8, the rotor core 38 is press-fitted into the rotor shaft 8 between the two end plates 42, 43. Thus, the rotor core 38 can be reliably prevented from coming off from the rotor shaft 8.

また金属管４０の鍔部４０ｂには、前記ロータシャフト８の軸線を含む縦断面では前記円筒部４０ａの一端から軸方向外方に膨らんだ曲面部分４０ｂａが設けられ、該曲面部分４０ｂａは、前記ロータコア３８の軸方向一端面よりも軸方向外方に突出して形成されるので、ロータの回転時に磁石３９，３９…に作用する遠心力によって金属管４０の円筒部４０ａおよび鍔部４０ｂの連設部に作用する応力は、曲面部分４０ｂａの曲面形状によって大幅に緩和されることになり、従来のものに比べて金属管４０の耐久性が向上し、ロータ９の高回転化が可能となる。また金属管４０の薄肉化が可能となり、ロータ９の周囲のステータ１０と、ロータコア３８の外周に配設される磁石３９，３９…との間のエアギャップを小さく設定することができ、ブラシレスモータの出力トルク向上が可能となる。またロータ９の慣性モーメントを小さくすることができ、ロータ９の応答性向上が可能となる。   The flange 40b of the metal tube 40 is provided with a curved surface portion 40ba that swells axially outward from one end of the cylindrical portion 40a in a longitudinal section including the axis of the rotor shaft 8, and the curved surface portion 40ba The cylindrical portion 40a and the flange portion 40b of the metal tube 40 are continuously provided by centrifugal force acting on the magnets 39, 39... The stress acting on the portion is greatly relieved by the curved surface shape of the curved surface portion 40ba, so that the durability of the metal tube 40 is improved compared to the conventional one, and the rotor 9 can be rotated at a higher speed. Further, the metal tube 40 can be thinned, and the air gap between the stator 10 around the rotor 9 and the magnets 39, 39,... Disposed on the outer periphery of the rotor core 38 can be set small. Output torque can be improved. Further, the moment of inertia of the rotor 9 can be reduced, and the response of the rotor 9 can be improved.

さらにロータシャフト８の軸線に直交する平面に沿う平面部分４０ｂｂが、前記曲面部分４０ｂａに連なって前記鍔部４０ｂの先端部に形成され、該平面部分４０ｂｂが前記ロータコア３８の軸方向一端面に当接するので、ロータコア３８に対する金属管４０の軸方向位置を精度よく定めることができる。   Further, a flat surface portion 40bb along a plane perpendicular to the axis of the rotor shaft 8 is formed at the tip end portion of the flange portion 40b in connection with the curved surface portion 40ba, and the flat surface portion 40bb contacts the one axial end surface of the rotor core 38. Therefore, the axial position of the metal tube 40 relative to the rotor core 38 can be accurately determined.

以上、本発明の実施の形態について説明したが、本発明は上記実施の形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

８・・・ロータシャフト
９・・・ロータ
３８・・・ロータコア
３９・・・磁石
４０・・・金属管
４０ａ・・・円筒部
４０ｂ・・・鍔部
４２，４３・・・端板 DESCRIPTION OF SYMBOLS 8 ... Rotor shaft 9 ... Rotor 38 ... Rotor core 39 ... Magnet 40 ... Metal pipe 40a ... Cylindrical part 40b ... Gutter part 42, 43 ... End plate

Claims (3)

ロータシャフト（８）を貫通せしめて該ロータシャフト（８）に固定されるロータコア（３８）と、該ロータコア（３８）の外周の周方向に等間隔をあけた複数箇所に配置される複数の磁石（３９）と、それらの磁石（３９）を嵌合せしめる円筒部（４０ａ）を有して前記ロータコア（３８）に固定される金属管（４０）とを備える回転電機用ロータにおいて、前記金属管（４０）は、前記円筒部（４０ａ）の一端から半径方向内方側に張り出す鍔部（４０ｂ）を一体に有し、前記ロータコア（３８）の軸方向一端に近接、対向して前記ロータシャフト（８）に圧入される端板（４２）と、前記ロータコア（３８）との間に前記鍔部（４０ｂ）の先端部が挟持されることで前記金属管（４０）が前記ロータコア（３８）に固定されることを特徴とする回転電機用ロータ。   A rotor core (38) that passes through the rotor shaft (8) and is fixed to the rotor shaft (8), and a plurality of magnets that are arranged at a plurality of positions at equal intervals in the circumferential direction of the outer periphery of the rotor core (38) (39) and a rotor for a rotating electrical machine comprising a metal pipe (40) having a cylindrical part (40a) into which the magnets (39) are fitted and fixed to the rotor core (38). (40) integrally has a flange portion (40b) projecting radially inward from one end of the cylindrical portion (40a), and is close to and opposed to one axial end of the rotor core (38). The metal pipe (40) is inserted into the rotor core (38) by sandwiching the tip of the flange (40b) between the end plate (42) press-fitted into the shaft (8) and the rotor core (38). Specially fixed to Rotating electric machine rotor according to. 前記端板（４２）が磁性材から成ることを特徴とする請求項１記載の回転電機用ロータ。   The rotor for a rotating electrical machine according to claim 1, wherein the end plate (42) is made of a magnetic material. 前記端板（４２）との間に前記ロータコア（３８）を挟む他の端板（４３）が前記ロータシャフト（８）に圧入されることを特徴とする請求項１または２記載の回転電機用ロータ。   3. The rotating electric machine according to claim 1, wherein another end plate (43) sandwiching the rotor core (38) between the end plate (42) and the end plate (42) is press-fitted into the rotor shaft (8). Rotor.
JP2010214903A 2010-09-27 2010-09-27 Fixing method of metal pipe to rotor core in rotor for rotary electric machine Expired - Fee Related JP5631133B2 (en)

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KR20170045998A (en) * 2015-10-20 2017-04-28 엘지이노텍 주식회사 Rotor assembly and motor having the same
KR102523835B1 (en) * 2015-10-20 2023-04-20 엘지이노텍 주식회사 Rotor assembly and motor having the same
JP2017158340A (en) * 2016-03-02 2017-09-07 株式会社ミツバ Rotor of electric motor and manufacturing method for rotor
EP4113795A3 (en) * 2021-06-07 2023-03-08 Black & Decker, Inc. Motor rotor with sleeve for retention of magnet ring
US11916447B2 (en) 2021-06-07 2024-02-27 Black & Decker Inc. Overmolded rotor structure

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