JP2015167432A - Rotary electric machine core, and method of manufacturing rotary electric machine core - Google Patents
Rotary electric machine core, and method of manufacturing rotary electric machine core Download PDFInfo
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本発明は、回転電機のコア及びその製造方法に関する。 The present invention relates to a core of a rotating electrical machine and a method for manufacturing the same.
特許文献１には、筒状をなすコア本体と、同コア本体とは別体の複数のティースと、コイルが巻かれるとともに各ティースに装着されるボビンとを備えたステータコアが開示されている。このステータコアにおいては、コア本体の内周面に複数の溝が周方向に間隔をおいて形成されており、同溝にはティースの基端部が圧入されている。そして、各ティースはコア本体の内周面から中心軸線に向けて突出している。また、各ティースの先端側壁には周方向に沿って延びる延設部が一体形成されている。各延設部は回転電機のコア全体として略円筒状をなし、ロータコアの外周面に対して周方向の広い範囲にわたって対向することとなる。そのため、各延設部を通じて磁束が集約されることで、モータのトルク変動が押えられるとともにモータのトルクが向上するとされている。 Patent Document 1 discloses a stator core including a cylindrical core body, a plurality of teeth separate from the core body, and bobbins on which coils are wound and attached to the teeth. In this stator core, a plurality of grooves are formed on the inner peripheral surface of the core body at intervals in the circumferential direction, and the base end portion of the teeth is press-fitted into the grooves. Each tooth protrudes from the inner peripheral surface of the core body toward the central axis. Moreover, the extension part extended along the circumferential direction is integrally formed in the front end side wall of each teeth. Each extending portion has a substantially cylindrical shape as a whole core of the rotating electrical machine, and faces the outer peripheral surface of the rotor core over a wide range in the circumferential direction. For this reason, the magnetic flux is concentrated through the extending portions, so that the torque fluctuation of the motor is suppressed and the torque of the motor is improved.
ところで、特許文献１に記載のステータコアにおいては、コア本体の内周面に形成された溝にティースの基端部が圧入されているため、コア本体とティースとの境界においては大きな圧縮応力が残留することとなる。そのため、磁束の流れにくい部位が形成されることとなり、磁束密度が低下することでモータの損失が増大することとなる。 Incidentally, in the stator core described in Patent Document 1, since the base end portion of the tooth is press-fitted into a groove formed on the inner peripheral surface of the core body, a large compressive stress remains at the boundary between the core body and the tooth. Will be. As a result, a portion where the magnetic flux does not easily flow is formed, and the loss of the motor increases as the magnetic flux density decreases.
本発明の目的は、回転電機の損失を低減することができる回転電機のコア及び回転電機のコアの製造方法を提供することにある。 The objective of this invention is providing the manufacturing method of the core of a rotary electric machine, and the core of a rotary electric machine which can reduce the loss of a rotary electric machine.
上記目的を達成するための回転電機のコアは、筒部及び同筒部の内周面から中心軸線に向けて突出するとともに周方向において間隔をおいて形成された複数のティースが一体形成されたコア本体と、コイルが巻かれた複数のボビンと、を備え、前記ティースに前記ボビンが装着されている。前記ティースは、第１ティースと、周方向において同第１ティースと１つおきに交互に設けられる第２ティースとを含み、前記ボビンは、前記第１ティースに装着される第１ボビンと、前記第２ティースに装着される第２ボビンと、を含み、前記第１ボビンには、同第１ボビンが装着される前記第１ティースに当接するとともに周方向に沿って延びる第１延設部と、周方向に沿って延びて前記第２ティースに当接する第２延設部とが設けられている。 The core of the rotating electrical machine for achieving the above object is integrally formed with a cylindrical portion and a plurality of teeth that protrude from the inner peripheral surface of the cylindrical portion toward the central axis and that are spaced apart in the circumferential direction. A core main body and a plurality of bobbins each having a coil wound thereon are provided, and the bobbins are attached to the teeth. The teeth include first teeth and second teeth alternately provided in the circumferential direction with the first teeth, and the bobbin includes first bobbins attached to the first teeth; A first bobbin mounted on the second tooth, and the first bobbin is in contact with the first tooth mounted on the first bobbin and extends along the circumferential direction. And a second extending portion that extends along the circumferential direction and contacts the second tooth.
また、上記目的を達成するための回転電機のコアの製造方法は、筒部及び同筒部の内周面から中心軸線に向けて突出するとともに周方向において間隔をおいて形成された複数のティースが一体形成されたコア本体と、コイルが巻かれた複数のボビンと、を備え、前記ティースに前記ボビンが装着されている回転電機のコアを製造する方法である。前記ティースは、第１ティースと、周方向において同第１ティースと１つおきに交互に設けられる第２ティースとを含み、前記ボビンは、前記第１ティースに装着される第１ボビンと、前記第２ティースに装着される第２ボビンと、を含み、前記第１ボビンには、同第１ボビンが装着される前記第１ティースに当接するとともに周方向に沿って延びる第１延設部と、周方向に沿って延びて前記第２ティースに当接する第２延設部とが設けられ、前記第２ティースに対して内周側から前記第２ボビンを外挿する第１工程と、前記第１工程の後に、前記第１ティースに対して内周側から前記第１ボビンを外挿する第２工程と、を含む。 In addition, a manufacturing method of a core of a rotating electrical machine for achieving the above object includes a cylindrical portion and a plurality of teeth that protrude from the inner peripheral surface of the cylindrical portion toward the central axis and that are spaced apart in the circumferential direction. Is a method of manufacturing a core of a rotating electrical machine including a core body integrally formed with a plurality of bobbins each having a coil wound thereon, and the bobbins mounted on the teeth. The teeth include first teeth and second teeth alternately provided in the circumferential direction with the first teeth, and the bobbin includes first bobbins attached to the first teeth; A first bobbin mounted on the second tooth, and the first bobbin is in contact with the first tooth mounted on the first bobbin and extends along the circumferential direction. A second extending portion that extends along a circumferential direction and contacts the second tooth, and a first step of extrapolating the second bobbin from the inner peripheral side with respect to the second tooth; And a second step of extrapolating the first bobbin from the inner peripheral side with respect to the first teeth after the first step.
上記構成によれば、第１ボビンに第１延設部と第２延設部とが設けられているため、第２ティースに対して第２ボビンを内周側から外挿した後に、第１ティースに対して第１ボビンを内周側から外挿して装着することで、第１ティース及び第２ティースにそれぞれ第１延設部及び第２延設部が当接することとなる。このため、例えばコイルの巻数を多くして周方向において隣接するボビンのコイル間の距離を短くすることが可能となり、回転電機の磁束密度を高めることができる。 According to the above configuration, since the first extending portion and the second extending portion are provided on the first bobbin, after the second bobbin is extrapolated from the inner peripheral side with respect to the second tooth, By attaching the first bobbin to the teeth by extrapolating from the inner peripheral side, the first extension portion and the second extension portion come into contact with the first teeth and the second teeth, respectively. For this reason, for example, the number of turns of the coil can be increased to shorten the distance between adjacent bobbin coils in the circumferential direction, and the magnetic flux density of the rotating electrical machine can be increased.
また、コア本体は筒部とティースとが一体形成されたものとされているため、筒部とティースとが分割体とされる構成とは異なり、筒部とティースとの境界が存在しない。このため、磁束の流れにくい部位が形成されることを抑制することができる。 Further, since the core body is formed by integrally forming the tube portion and the teeth, there is no boundary between the tube portion and the teeth unlike the configuration in which the tube portion and the teeth are divided. For this reason, it can suppress that the site | part which a magnetic flux does not flow easily is formed.
よって、各ティースの先端に周方向に沿って延びる延設部を設ける構成を採用しながらも、回転電機の磁束密度を効果的に高めることができる。 Therefore, the magnetic flux density of the rotating electrical machine can be effectively increased while adopting a configuration in which an extending portion extending in the circumferential direction is provided at the tip of each tooth.
本発明によれば、回転電機の損失を低減することができる。 According to the present invention, loss of a rotating electrical machine can be reduced.
以下、図１〜図６を参照して、回転電機のコア及び回転電機のコアの製造方法を電動モータのステータコア及びその製造方法として具体化した一実施形態について説明する。
図１に示すように、ステータコア１０のケース１２は、内周側に円柱状の空間を有している。ケース１２の内周側には磁性体からなるコア本体２０が設けられている。コア本体２０は、例えば多数枚の金属板を積層することによって形成されている。
Hereinafter, an embodiment in which a rotating electrical machine core and a manufacturing method of a rotating electrical machine core are embodied as a stator core of an electric motor and a manufacturing method thereof will be described with reference to FIGS.
As shown in FIG. 1, the case 12 of the stator core 10 has a cylindrical space on the inner peripheral side. A core body 20 made of a magnetic material is provided on the inner peripheral side of the case 12. The core body 20 is formed, for example, by laminating a large number of metal plates.
図２に示すように、コア本体２０は、円筒状をなす筒部２１と、同筒部２１の内周面から中心軸線Ｃに向けて突出するとともに周方向において等間隔にて形成された複数のティース２４，２６とを有している。筒部２１と各ティース２４，２６とは一体形成されている。 As shown in FIG. 2, the core body 20 includes a cylindrical cylindrical portion 21, and a plurality of cylindrical bodies 21 that protrude from the inner peripheral surface of the cylindrical portion 21 toward the central axis C and are equally spaced in the circumferential direction. Teeth 24, 26. The tube portion 21 and the teeth 24 and 26 are integrally formed.
図１に示すように、筒部２１の外周面には複数の固定片２２が外周側に向けて突設されており、同固定片２２には挿通孔２３が形成されている。各挿通孔２３に挿通されるねじ１４によって、ケース１２に対してコア本体２０が固設されている。 As shown in FIG. 1, a plurality of fixed pieces 22 project from the outer peripheral surface of the cylindrical portion 21 toward the outer peripheral side, and an insertion hole 23 is formed in the fixed piece 22. The core body 20 is fixed to the case 12 by screws 14 inserted through the insertion holes 23.
図１及び図２に示すように、上記ティース２４，２６は周方向において交互に設けられている。すなわち、第１ティース２４と第２ティース２６とが周方向において１つおきに形成されている。 As shown in FIGS. 1 and 2, the teeth 24 and 26 are provided alternately in the circumferential direction. That is, every other first tooth 24 and second tooth 26 are formed in the circumferential direction.
図２に示すように、第１ティース２４の内周面２４ａは円弧状をなしており、同内周面２４ａにおける周方向の両端には切欠部２５が形成されている。また、第２ティース２６の内周面２６ａの両端部は円弧状をなしており、同内周面２６ａには一対の凹部２７が周方向において間隔をおいて形成されている。凹部２７は、同凹部２７に隣接する第１ティース２４の突出方向Ａに沿って延びている。また、前記一対の凹部２７の間には内周面２６ａよりも内周側に向けて突出した三角形状の突出部２８が形成されている。 As shown in FIG. 2, the inner peripheral surface 24a of the first tooth 24 has an arc shape, and notches 25 are formed at both ends of the inner peripheral surface 24a in the circumferential direction. Further, both end portions of the inner peripheral surface 26a of the second tooth 26 have an arc shape, and a pair of recesses 27 are formed in the inner peripheral surface 26a at intervals in the circumferential direction. The recess 27 extends along the protruding direction A of the first tooth 24 adjacent to the recess 27. In addition, a triangular protrusion 28 is formed between the pair of recesses 27 and protrudes toward the inner peripheral side with respect to the inner peripheral surface 26a.
図１に示すように、第１ティース２４にはコイル３５が巻かれた第１ボビン３０が装着されている。また、第２ティース２６にはコイル４５が巻かれた第２ボビン４０が装着されている。 As shown in FIG. 1, a first bobbin 30 around which a coil 35 is wound is attached to the first tooth 24. A second bobbin 40 around which a coil 45 is wound is attached to the second tooth 26.
図３（ａ）に示すように、第１ボビン３０は、筒状をなし、第１ティース２４に外嵌されるボビン本体３１と、同ボビン本体３１の基端（同図の上端）に形成されたフランジ３１ａと、同ボビン本体３１の先端に形成されたフランジ３１ｂとを有している。 As shown in FIG. 3A, the first bobbin 30 has a cylindrical shape, and is formed on the bobbin main body 31 that is externally fitted to the first tooth 24, and at the base end (the upper end of the same figure) of the bobbin main body 31. And a flange 31b formed at the tip of the bobbin main body 31.
また、ボビン本体３１の先端には、前記コア本体２０と同一の金属材料からなる第１延設部３２が固設されている。第１延設部３２の外周面及び内周面は共に円弧状をなしている。図１に示すように、第１延設部３２の外周面が第１ティース２４の内周面２４ａに当接している。 A first extending portion 32 made of the same metal material as that of the core body 20 is fixedly provided at the tip of the bobbin body 31. Both the outer peripheral surface and the inner peripheral surface of the first extending portion 32 have an arc shape. As shown in FIG. 1, the outer peripheral surface of the first extending portion 32 is in contact with the inner peripheral surface 24 a of the first tooth 24.
図３（ａ）に示すように、第１延設部３２の外周面には、第１ティース２４の突出方向Ａに沿って延びるとともに第１ティース２４の切欠部２５に嵌合される一対の爪部３２ｂが突設されている。第１延設部３２の先端側壁には周方向の両外側に向けて突出する突片３２ａが形成されている。 As shown in FIG. 3A, a pair of outer peripheral surfaces of the first extending portion 32 extends along the protruding direction A of the first tooth 24 and is fitted into the notch portion 25 of the first tooth 24. A claw portion 32b is projected. Projection pieces 32 a that protrude toward both outer sides in the circumferential direction are formed on the distal end side wall of the first extension portion 32.
また、第１延設部３２の突片３２ａにおける周方向の両側には、前記コア本体２０と同一の金属材料からなる第２延設部３３が上記フランジ３１ｂを介して固定されている。第２延設部３３の外周面及び内周面は共に円弧状をなしている。図１に示すように、第２延設部３３の外周面が第２ティース２６の内周面２６ａに当接している。 Moreover, the 2nd extension part 33 which consists of the same metal material as the said core main body 20 is being fixed via the said flange 31b at the both sides of the circumferential direction in the protrusion 32a of the 1st extension part 32. As shown in FIG. Both the outer peripheral surface and the inner peripheral surface of the second extending portion 33 have an arc shape. As shown in FIG. 1, the outer peripheral surface of the second extending portion 33 is in contact with the inner peripheral surface 26 a of the second tooth 26.
図３（ａ）に示すように、各第２延設部３３の外周面には、第２ティース２６の凹部２７に嵌合される爪部３３ｂが突設されている。各爪部３３ｂは、第１ボビン３０が装着される第１ティース２４の突出方向Ａに沿ってそれぞれ延びている。第２延設部３３の先端側壁には周方向の第１延設部３２に近接する側に向けて突出する突片３３ａが形成されている。この突片３３ａと第１延設部３２の突片３２ａとの間には第１ボビン３０のフランジ３１ｂが介在している。なお、ボビン本体３１及びフランジ３１ａ，３１ｂは共に樹脂材料からなり、インサート成形によって第１延設部３２及び第２延設部３３に固定されている。 As shown in FIG. 3A, a claw portion 33 b that is fitted into the concave portion 27 of the second tooth 26 protrudes from the outer peripheral surface of each second extending portion 33. Each claw portion 33b extends along the protruding direction A of the first tooth 24 to which the first bobbin 30 is attached. A protruding piece 33a is formed on the distal end side wall of the second extending portion 33 so as to protrude toward the side close to the first extending portion 32 in the circumferential direction. A flange 31 b of the first bobbin 30 is interposed between the protruding piece 33 a and the protruding piece 32 a of the first extending portion 32. Both the bobbin main body 31 and the flanges 31a and 31b are made of a resin material, and are fixed to the first extending portion 32 and the second extending portion 33 by insert molding.
図３（ｂ）に示すように、第２ボビン４０は、筒状をなし、第２ティース２６に外嵌されるボビン本体４１と、同ボビン本体４１の基端に形成されたフランジ４１ａと、同ボビン本体４１の先端に形成されフランジ４１ｂとを有している。ボビン本体４１及びフランジ４１ａ，４１ｂは共に樹脂材料からなる。 As shown in FIG. 3 (b), the second bobbin 40 has a cylindrical shape, a bobbin main body 41 that is externally fitted to the second teeth 26, a flange 41a formed at the base end of the bobbin main body 41, The bobbin main body 41 has a flange 41b formed at the tip. Both the bobbin main body 41 and the flanges 41a and 41b are made of a resin material.
図３（ａ）に示すように、第１ボビン３０に巻かれたコイル３５の巻数は、同コイル３５の外周面が前記突出方向Ａに沿うように同突出方向Ａにおいて略同一とされている。
また、図３（ｂ）に示すように、第２ボビン４０に巻かれたコイル４５の巻数は、同コイル４５の外周面が前記突出方向Ａに沿うようにボビン本体４１の先端側（同図の下側）ほど少なくされている。
As shown in FIG. 3A, the number of turns of the coil 35 wound around the first bobbin 30 is substantially the same in the protruding direction A so that the outer peripheral surface of the coil 35 is along the protruding direction A. .
Further, as shown in FIG. 3B, the number of turns of the coil 45 wound around the second bobbin 40 is such that the outer peripheral surface of the coil 45 is along the protruding direction A (the same as the front end side of the bobbin body 41). The lower side) is reduced.
次に、図４及び図５を参照して、ステータコア１０の組み立て工程の手順について説明する。
ステータコア１０の組み立てに際しては、まず、図４に示すように、コア本体２０の第２ティース２６の各々に対して内周側から第２ボビン４０が外挿され、第２ボビン４０のフランジ４１ａがコア本体２０の筒部２１の内周面に当接される（第１工程）。
Next, with reference to FIG.4 and FIG.5, the procedure of the assembly process of the stator core 10 is demonstrated.
When assembling the stator core 10, first, as shown in FIG. 4, the second bobbin 40 is extrapolated from the inner peripheral side to each of the second teeth 26 of the core body 20, and the flange 41 a of the second bobbin 40 is It contacts the inner peripheral surface of the cylindrical portion 21 of the core body 20 (first step).
次に、図５（ａ）、（ｂ）に示すように、コア本体２０の第１ティース２４の各々に対して内周側から第１ボビン３０が外挿される。このとき、第１ティース２４の切欠部２５に対して第１延設部３２の爪部３２ｂが嵌合され、第１ティース２４の内周面２４ａに第１延設部３２の外周面が当接される。また、第２ティース２６の凹部２７に対して第２延設部３３の爪部３３ｂが嵌合され、第２ティース２６の内周面２６ａに第２延設部３３の外周面が当接される。そして、第２延設部３３の周方向外側の端面が第２ティース２６の突出部２８の傾斜面に当接される（第２工程）。 Next, as shown in FIGS. 5A and 5B, the first bobbin 30 is extrapolated from the inner peripheral side to each of the first teeth 24 of the core body 20. At this time, the claw portion 32b of the first extension portion 32 is fitted to the notch portion 25 of the first tooth 24, and the outer peripheral surface of the first extension portion 32 is in contact with the inner peripheral surface 24a of the first tooth 24. Touched. Further, the claw portion 33b of the second extending portion 33 is fitted into the concave portion 27 of the second tooth 26, and the outer peripheral surface of the second extending portion 33 is brought into contact with the inner peripheral surface 26a of the second tooth 26. The And the end surface of the circumferential direction outer side of the 2nd extension part 33 is contact | abutted to the inclined surface of the protrusion part 28 of the 2nd teeth 26 (2nd process).
次に、比較例のステータコア１１０と対比しつつ本実施形態のステータコア１０の作用について説明する。
図６（ａ）〜（ｄ）に示すように、比較例のステータコア１１０のコア本体１２０は、略Ｔ字状をなす複数のコア分割体１２１から構成されている。各コア分割体１２１はティース部１２４を有しており、同ティース部１２４の先端側壁には延設部１２５が突設されている。また、ティース部１２４にはボビン１３０が装着されており、同ボビン１３０にはコイル１３５が巻かれている。ボビン１３０は２つに分割された一対のピースからなる。従って、ティース部１２４に延設部１２５を形成しつつも、同ティース部１２４にボビン１３０を装着することができる。
Next, the operation of the stator core 10 of the present embodiment will be described in comparison with the stator core 110 of the comparative example.
As shown in FIGS. 6A to 6D, the core body 120 of the stator core 110 of the comparative example is composed of a plurality of core divided bodies 121 having a substantially T shape. Each core division body 121 has a tooth portion 124, and an extending portion 125 projects from the tip side wall of the tooth portion 124. Further, a bobbin 130 is attached to the tooth portion 124, and a coil 135 is wound around the bobbin 130. The bobbin 130 consists of a pair of pieces divided into two. Therefore, the bobbin 130 can be attached to the tooth portion 124 while the extending portion 125 is formed in the tooth portion 124.
このステータコア１１０においては、図６（ｂ）に示すように、コア分割体１２１の周方向の両端面に形成された凸部１２１ａ及び凹部１２１ｂが、同コア分割体１２１に周方向に隣接する他のコア分割体１２１の凹部１２１ｂ及び凸部１２１ａにそれぞれ嵌合されることによってコア本体１２０が形成される。そして、図６（ｃ）に示す金属製のケース１１２を加熱して膨張させてその内周側にコア本体１２０を挿入する、所謂焼き嵌めすることによって、図６（ｄ）に示すように、コア本体１２０に外嵌される。 In this stator core 110, as shown in FIG. 6B, convex portions 121 a and concave portions 121 b formed on both circumferential end surfaces of the core divided body 121 are adjacent to the core divided body 121 in the circumferential direction. The core main body 120 is formed by fitting into the concave portion 121b and the convex portion 121a of the core divided body 121, respectively. Then, by heating and expanding the metal case 112 shown in FIG. 6 (c) and inserting the core body 120 on the inner peripheral side, so-called shrink fitting, as shown in FIG. 6 (d), The core body 120 is externally fitted.
しかしながら、この場合には、ケース１１２の内周面、コア本体１２０の外周面、及び各コア分割体１２１の周方向の両端面には大きな圧縮応力が残留することとなる。従って、このように大きな圧縮応力が残留する部位では磁束が流れにくくなり、磁束密度が低下することでモータの損失が増大することとなる。 However, in this case, a large compressive stress remains on the inner peripheral surface of the case 112, the outer peripheral surface of the core body 120, and both end surfaces in the circumferential direction of each core divided body 121. Therefore, the magnetic flux hardly flows in the portion where such a large compressive stress remains, and the loss of the motor increases due to the decrease of the magnetic flux density.
これに対して、本実施形態のステータコア１０においては、第１ボビン３０に第１延設部３２と第２延設部３３とが設けられている。このため、第２ティース２６に対して第２ボビン４０を装着した後に、第１ティース２４に対して第１ボビン３０を装着することで、第１ティース２４の内周面２４ａ及び第２ティース２６の内周面２６ａにそれぞれ第１延設部３２及び第２延設部３３が当接することとなる。 On the other hand, in the stator core 10 of the present embodiment, the first extending portion 32 and the second extending portion 33 are provided on the first bobbin 30. For this reason, after attaching the 2nd bobbin 40 with respect to the 2nd teeth 26, attaching the 1st bobbin 30 with respect to the 1st teeth 24, the inner peripheral surface 24a of the 1st teeth 24, and the 2nd teeth 26 The first extending portion 32 and the second extending portion 33 come into contact with the inner peripheral surface 26a.
よって、コイル３５，４５の巻数を多くすることで周方向に互いに隣接するボビン３０，４０のコイル３５，４５間の距離、すなわちコイル３５の外周面と同コイル３５に隣接するコイル４５の外周面との距離を短くすることが可能となる。このため、各ティース２４，２６にボビン３０，４０を装着することができるため、各ティース２４，２６に延設部３２，３３を設定することが可能となり、モータの磁束密度を高めることができる。 Therefore, by increasing the number of turns of the coils 35 and 45, the distance between the coils 35 and 45 of the bobbins 30 and 40 adjacent to each other in the circumferential direction, that is, the outer peripheral surface of the coil 35 and the outer peripheral surface of the coil 45 adjacent to the coil 35. It is possible to shorten the distance. For this reason, since the bobbins 30 and 40 can be mounted on the teeth 24 and 26, the extending portions 32 and 33 can be set on the teeth 24 and 26, and the magnetic flux density of the motor can be increased. .
また、コア本体２０は筒部２１とティース２４，２６とが一体形成されたものとされているため、筒部２１とティース２４，２６との境界が存在しない。このため、磁束の流れにくい部位が形成されることを抑制することができる。 In addition, since the core body 20 is formed by integrally forming the cylindrical portion 21 and the teeth 24 and 26, there is no boundary between the cylindrical portion 21 and the teeth 24 and 26. For this reason, it can suppress that the site | part which a magnetic flux does not flow easily is formed.
なお、第１延設部３２の爪部３２ｂと第１ティース２４の切欠部２５とが嵌合され、第２延設部３３の爪部３３ｂと第２ティース２６の凹部２７とが嵌合されている。しかしながら、これらの部位の体格は小さく、同部位に作用する圧縮応力は比較例のステータコア１１０に残留する圧縮応力や先の特許文献１に記載のステータコアに残留する圧縮応力に比べて無視できるほど小さい。 The claw portion 32b of the first extension portion 32 and the notch portion 25 of the first tooth 24 are fitted, and the claw portion 33b of the second extension portion 33 and the recess portion 27 of the second tooth 26 are fitted. ing. However, the physiques of these parts are small, and the compressive stress acting on the parts is negligibly small compared to the compressive stress remaining in the stator core 110 of the comparative example and the compressive stress remaining in the stator core described in Patent Document 1 above. .
よって、各ティース２４，２６の先端に周方向に沿って延びる延設部３２，３３を設ける構成を採用しながらも、モータの磁束密度を効果的に高めることができる。
以上説明した本実施形態に係る回転電機のコア及び回転電機のコアの製造方法によれば、以下に示す効果が得られるようになる。
Therefore, the magnetic flux density of the motor can be effectively increased while adopting a configuration in which the extending portions 32 and 33 extending along the circumferential direction are provided at the tips of the teeth 24 and 26.
According to the rotating electrical machine core and the rotating electrical machine core manufacturing method according to the present embodiment described above, the following effects can be obtained.
（１）ステータコア１０は、筒部２１及び同筒部２１の内周面から中心軸線Ｃに向けて突出するとともに周方向において間隔をおいて形成された複数のティース２４，２６が一体形成されたコア本体２０と、コイル３５，４５が巻かれた複数のボビン３０，４０と、を備え、ティース２４，２６にボビン３０，４０がそれぞれ装着されている。ティース２４，２６は、第１ティース２４と、周方向において同第１ティース２４と１つおきに交互に設けられる第２ティース２６とからなる。ボビン３０，４０は、第１ティース２４に装着される第１ボビン３０と、第２ティース２６に装着される第２ボビン４０とからなる。第１ボビン３０には、同第１ボビン３０が装着される第１ティース２４の内周面２４ａに当接するとともに周方向に沿って延びる第１延設部３２と、周方向に沿って延びて第２ティース２６の内周面２６ａに当接する第２延設部３３とが設けられている。 (1) The stator core 10 is integrally formed with a cylindrical portion 21 and a plurality of teeth 24 and 26 that protrude from the inner peripheral surface of the cylindrical portion 21 toward the central axis C and that are spaced apart in the circumferential direction. A core body 20 and a plurality of bobbins 30 and 40 around which coils 35 and 45 are wound are provided, and the bobbins 30 and 40 are mounted on the teeth 24 and 26, respectively. The teeth 24 and 26 include first teeth 24 and second teeth 26 alternately provided with the first teeth 24 in the circumferential direction. The bobbins 30 and 40 include a first bobbin 30 attached to the first tooth 24 and a second bobbin 40 attached to the second tooth 26. The first bobbin 30 is in contact with the inner peripheral surface 24a of the first tooth 24 to which the first bobbin 30 is mounted, and extends along the circumferential direction, and extends along the circumferential direction. A second extending portion 33 that contacts the inner peripheral surface 26 a of the second tooth 26 is provided.
こうした構成によれば、第１ボビン３０に第１延設部３２と第２延設部３３とが設けられているため、第１ティース２４の内周面２４ａ及び第２ティース２６の内周面２６ａにそれぞれ第１延設部３２及び第２延設部３３が当接することとなる。このため、例えばコイル３５，４５の巻数を多くして周方向において隣接するボビン３０，４０のコイル３５，４５間の距離、すなわちコイル３５の外周面とコイル４５の外周面との距離を短くすることが可能となり、モータの磁束密度を高めることができる。 According to such a configuration, since the first extending portion 32 and the second extending portion 33 are provided on the first bobbin 30, the inner peripheral surface 24 a of the first tooth 24 and the inner peripheral surface of the second tooth 26. The first extending portion 32 and the second extending portion 33 come into contact with 26a, respectively. For this reason, for example, the number of turns of the coils 35 and 45 is increased to shorten the distance between the coils 35 and 45 of the bobbins 30 and 40 adjacent in the circumferential direction, that is, the distance between the outer peripheral surface of the coil 35 and the outer peripheral surface of the coil 45. And the magnetic flux density of the motor can be increased.
また、コア本体２０は筒部２１とティース２４，２６とが一体形成されたものとされているため、筒部とティースとが分割体とされる構成とは異なり、筒部２１とティース２４，２６との境界が存在しない。このため、磁束の流れにくい部位が形成されることを抑制することができる。 Moreover, since the core body 20 is formed by integrally forming the cylindrical portion 21 and the teeth 24 and 26, unlike the configuration in which the cylindrical portion and the teeth are divided, the cylindrical portion 21 and the teeth 24, 26 does not exist. For this reason, it can suppress that the site | part which a magnetic flux does not flow easily is formed.
よって、各ティース２４，２６の先端に周方向に沿って延びる延設部３２，３３を設ける構成を採用しながらも、モータの磁束密度を効果的に高めることができる。従って、モータの損失を低減することができる。 Therefore, the magnetic flux density of the motor can be effectively increased while adopting a configuration in which the extending portions 32 and 33 extending along the circumferential direction are provided at the tips of the teeth 24 and 26. Therefore, the loss of the motor can be reduced.
（２）第２延設部３３は第２ティース２６に嵌合されている。
こうした構成によれば、第２ティース２６の内周面２６ａに対して第２延設部３３を当接させつつ固定することができる。従って、第２ティース２６の内周面２６ａに対して第２延設部３３を適切に当接させることができ、ステータコア１０内部の磁束を強めることができる。
(2) The second extending portion 33 is fitted to the second tooth 26.
According to such a configuration, the second extending portion 33 can be fixed while being in contact with the inner peripheral surface 26 a of the second tooth 26. Accordingly, the second extending portion 33 can be properly brought into contact with the inner peripheral surface 26a of the second tooth 26, and the magnetic flux inside the stator core 10 can be strengthened.
（３）第１ボビン３０には、同第１ボビン３０が装着される第１ティース２４の周方向の両側に隣接する第２ティース２６にそれぞれ対応する２つの第２延設部３３が一体に設けられている。第２延設部３３には爪部３３ｂが形成され、第２ティース２６の内周面２６ａには爪部３３ｂが嵌合される凹部２７が形成されている。爪部３３ｂ及び凹部２７は第２延設部３３を有する第１ボビン３０が装着される第１ティース２４の突出方向Ａに沿って延びている。 (3) The first bobbin 30 is integrally formed with two second extending portions 33 respectively corresponding to the second teeth 26 adjacent to both sides in the circumferential direction of the first tooth 24 to which the first bobbin 30 is attached. Is provided. A claw portion 33 b is formed in the second extending portion 33, and a concave portion 27 in which the claw portion 33 b is fitted is formed in the inner peripheral surface 26 a of the second tooth 26. The claw portion 33 b and the concave portion 27 extend along the protruding direction A of the first tooth 24 to which the first bobbin 30 having the second extending portion 33 is attached.
こうした構成によれば、第１ティース２４に第１ボビン３０を内周側から外嵌して装着する際に、第２延設部３３に形成された爪部３３ｂを、第２ティース２６の内周面２６ａに形成された凹部２７に対して円滑に嵌合させることができる。 According to such a configuration, when the first bobbin 30 is fitted on the first tooth 24 from the inner peripheral side, the claw portion 33b formed on the second extending portion 33 is attached to the inner side of the second tooth 26. It can be smoothly fitted to the recess 27 formed in the peripheral surface 26a.
（４）第１延設部３２は第１ティース２４に嵌合されている。
こうした構成によれば、第１ティース２４の内周面２４ａに対して第１延設部３２を当接させつつ固定することができる。従って、第１ティース２４の内周面２４ａに対して第１延設部３２を適切に当接させることができ、ステータコア１０内部の磁束を強めることができる。
(4) The first extending portion 32 is fitted to the first tooth 24.
According to such a configuration, the first extending portion 32 can be fixed while being in contact with the inner peripheral surface 24 a of the first tooth 24. Therefore, the 1st extension part 32 can be made to contact | abut appropriately with respect to the internal peripheral surface 24a of the 1st teeth 24, and the magnetic flux inside the stator core 10 can be strengthened.
（５）第１延設部３２には爪部３２ｂが形成され、第１ティース２４の内周面２４ａには爪部３２ｂが嵌合される切欠部２５が形成され、爪部３２ｂ及び切欠部２５は第１ティース２４の突出方向Ａに沿って延びている。 (5) The first extending portion 32 is formed with a claw portion 32b, and the inner peripheral surface 24a of the first tooth 24 is formed with a notch portion 25 into which the claw portion 32b is fitted, and the claw portion 32b and the notch portion. 25 extends along the protruding direction A of the first tooth 24.
こうした構成によれば、第１ティース２４に第１ボビン３０を内周側から外嵌して装着する際に、第１延設部３２に形成された爪部３２ｂを、第１ティース２４の内周面２４ａに形成された切欠部２５に対して円滑に嵌合させることができる。 According to such a configuration, when the first bobbin 30 is fitted on the first tooth 24 from the inner peripheral side, the claw portion 32b formed on the first extending portion 32 is attached to the inner side of the first tooth 24. It can be smoothly fitted to the notch 25 formed in the peripheral surface 24a.
（６）ステータコア１０を製造する方法は、第２ティース２６に対して内周側から第２ボビン４０を外挿する第１工程と、第１工程の後に、第１ティース２４に対して内周側から第１ボビン３０を外挿する第２工程と、を含む。 (6) The method of manufacturing the stator core 10 includes the first step of extrapolating the second bobbin 40 from the inner peripheral side to the second tooth 26, and the inner periphery of the first tooth 24 after the first step. A second step of extrapolating the first bobbin 30 from the side.
こうした方法によれば、コイル３５，４５の巻数を多くしてコイル３５の外周面と同コイル３５に隣接するコイル４５の外周面との距離が短くされた場合であっても、第１ティース２４及び第２ティース２６にそれぞれ第１延設部３２及び第２延設部３３を当接させることができる。従って、上記効果（１）に準じた効果を奏することができる。 According to such a method, even if the number of turns of the coils 35 and 45 is increased and the distance between the outer peripheral surface of the coil 35 and the outer peripheral surface of the coil 45 adjacent to the coil 35 is shortened, the first teeth 24 are obtained. The first extending portion 32 and the second extending portion 33 can be brought into contact with the second teeth 26, respectively. Therefore, the effect according to the effect (1) can be achieved.
なお、本発明に係る回転電機のコアは、上記実施形態にて例示した構成に限定されるものではなく、これを適宜変更した例えば次のような形態として実施することもできる。
・第１延設部の外周面に切欠部などの凹部を形成し、第１ティースの内周面に同凹部に嵌合する爪部などの凸部を設けるようにしてもよい。
The core of the rotating electrical machine according to the present invention is not limited to the configuration exemplified in the above-described embodiment, and can be implemented as, for example, the following forms appropriately modified.
-You may make it form a recessed part, such as a notch part, in the outer peripheral surface of a 1st extension part, and provide convex parts, such as a nail | claw part fitted to the same recessed part, in the inner peripheral surface of a 1st teeth.
・例えば第１ティースの側面に凹部を形成し、第１ボビンのボビン本体に同凹部に嵌合する爪部を形成することなどにより、第１ティースに対して第１延設部が当接した状態を保持することができるのであれば、第１ティースに第１延設部が嵌合されない構成を採用することもできる。また、各ティースに対して接着剤を介してボビンを固定するようにしてもよい。 -For example, by forming a concave portion on the side surface of the first tooth and forming a claw portion that fits into the concave portion on the bobbin body of the first bobbin, the first extending portion abuts against the first tooth. As long as the state can be maintained, a configuration in which the first extending portion is not fitted to the first tooth can be employed. Moreover, you may make it fix a bobbin with respect to each teeth via an adhesive agent.
・第１ボビンのボビン本体と第１延設部及び第２延設部とを別体として形成し、これらを接着剤を介して互いに固定するようにしてもよい。
・第２延設部の外周面に凹部を形成し、第２ティースの内周面に同凹部に嵌合する爪部などの凸部を設けるようにしてもよい。
-You may make it form the bobbin main body of a 1st bobbin, a 1st extension part, and a 2nd extension part as a different body, and fix these mutually through an adhesive agent.
-You may make it form a recessed part in the outer peripheral surface of a 2nd extension part, and provide convex parts, such as a nail | claw part fitted to the same recessed part, in the inner peripheral surface of a 2nd tooth.
・例えば第１ティースの側面に凹部を形成し、第１ボビンのボビン本体に同凹部に嵌合する爪部を形成することなどにより、第２ティースに対して第２延設部が当接した状態を保持することができるのであれば、第２ティースに第２延設部が嵌合されない構成を採用することもできる。 -For example, by forming a recess on the side surface of the first tooth and forming a claw portion that fits into the recess on the bobbin body of the first bobbin, the second extending portion abuts against the second tooth. As long as the state can be maintained, a configuration in which the second extending portion is not fitted to the second tooth can be employed.
・第１ボビンに一体に設けられる第２延設部を１つとすることもできる。すなわち、第１ボビンが装着される第１ティースの周方向の片側に隣接する第２延設部のみを第１ボビンに一体に設けるようにしてもよい。 -The 2nd extending part provided integrally in a 1st bobbin can also be made into one. That is, only the second extending portion adjacent to one side in the circumferential direction of the first tooth on which the first bobbin is mounted may be provided integrally with the first bobbin.
・本発明をステータコアの外周側に設けられるロータコアに対して適用することもできる。すなわち、筒部と同筒部の内周面から中心軸線に向けて突出する複数のティースとを有するコア本体を備えたロータコアに対して本発明を適用してもよい。 -This invention can also be applied with respect to the rotor core provided in the outer peripheral side of a stator core. That is, you may apply this invention with respect to the rotor core provided with the core main body which has a cylindrical part and several teeth which protrude toward the center axis line from the internal peripheral surface of the cylindrical part.
・本発明を発電機を構成するコアに対して適用することもできる。 -This invention can also be applied with respect to the core which comprises a generator.
１０…ステータコア（コア）、１２…ケース、１４…ねじ、２０…コア本体、２１…筒部、２２…固定片、２３…挿通孔、２４…第１ティース、２４ａ…内周面、２５…切欠部（凹部）、２６…第２ティース、２６ａ…内周面、２７…凹部、２８…突出部、３０…第１ボビン、３１…ボビン本体、３１ａ…フランジ、３１ｂ…フランジ、３２…第１延設部、３２ａ…突片、３２ｂ…爪部（凸部）、３３…第２延設部、３３ａ…突片、３３ｂ…爪部（凸部）、３５…コイル、４０…第２ボビン、４１…ボビン本体、４１ａ…フランジ、４１ｂ…フランジ、４５…コイル、１１０…ステータコア、１１２…ケース、１２０…コア本体、１２１…コア分割体、１２１ａ…凸部、１２１ｂ…凹部、１２４…ティース部、１２５…延設部、１３０…ボビン、１３１…ボビン本体、１３１ａ…フランジ、１３１ｃ…フランジ、１３５…コイル、Ｃ…中心軸線。 DESCRIPTION OF SYMBOLS 10 ... Stator core (core), 12 ... Case, 14 ... Screw, 20 ... Core main body, 21 ... Cylindrical part, 22 ... Fixed piece, 23 ... Insertion hole, 24 ... First teeth, 24a ... Inner peripheral surface, 25 ... Notch Part (recessed part), 26 ... second tooth, 26a ... inner peripheral surface, 27 ... recessed part, 28 ... projecting part, 30 ... first bobbin, 31 ... bobbin body, 31a ... flange, 31b ... flange, 32 ... first extension 32a ... projecting piece, 32b ... claw part (convex part), 33 ... second extending part, 33a ... projecting piece, 33b ... claw part (convex part), 35 ... coil, 40 ... second bobbin, 41 ... bobbin main body, 41a ... flange, 41b ... flange, 45 ... coil, 110 ... stator core, 112 ... case, 120 ... core main body, 121 ... core divided body, 121a ... convex part, 121b ... concave part, 124 ... tooth part, 125 ... Extension part, 130 ... Bobi , 131 ... bobbin main body, 131a ... flange, 131c ... flange, 135 ... coil, C ... central axis.
Claims (5)
前記ティースは、第１ティースと、周方向において同第１ティースと１つおきに交互に設けられる第２ティースとを含み、
前記ボビンは、前記第１ティースに装着される第１ボビンと、前記第２ティースに装着される第２ボビンと、を含み、
前記第１ボビンには、同第１ボビンが装着される前記第１ティースに当接するとともに周方向に沿って延びる第１延設部と、周方向に沿って延びて前記第２ティースに当接する第２延設部とが設けられている、
回転電機のコア。 A core body integrally formed with a plurality of teeth projecting from a cylindrical portion and an inner peripheral surface of the cylindrical portion toward the central axis and spaced apart in the circumferential direction; and a plurality of bobbins wound with coils A core of a rotating electrical machine in which the bobbin is mounted on the teeth,
The teeth include first teeth and second teeth alternately provided with the first teeth and every other one in the circumferential direction,
The bobbin includes a first bobbin attached to the first tooth and a second bobbin attached to the second tooth,
The first bobbin is in contact with the first teeth on which the first bobbin is mounted, and extends along the circumferential direction, and extends along the circumferential direction and contacts the second teeth. A second extending portion is provided,
The core of a rotating electrical machine.
請求項１に記載の回転電機のコア。 The first bobbin is provided with two second extending portions respectively corresponding to the second teeth adjacent to both sides in the circumferential direction of the first tooth on which the first bobbin is mounted.
The core of the rotating electrical machine according to claim 1.
請求項１又は請求項２に記載の回転電機のコア。 The second extending portion is fitted to the second tooth,
The core of the rotating electrical machine according to claim 1 or 2.
前記凸部及び前記凹部は前記第２延設部を有する前記第１ボビンが装着される前記第１ティースの突出方向に沿って延びている、
請求項３に記載の回転電機のコア。 A convex portion is formed on one of the inner peripheral surfaces of the second extending portion and the second tooth, and a concave portion in which the convex portion is fitted is formed on the other.
The convex portion and the concave portion extend along a protruding direction of the first teeth on which the first bobbin having the second extending portion is mounted.
The core of the rotating electrical machine according to claim 3.
前記ティースは、第１ティースと、周方向において同第１ティースと１つおきに交互に設けられる第２ティースとを含み、
前記ボビンは、前記第１ティースに装着される第１ボビンと、前記第２ティースに装着される第２ボビンと、を含み、
前記第１ボビンには、同第１ボビンが装着される前記第１ティースに当接するとともに周方向に沿って延びる第１延設部と、周方向に沿って延びて前記第２ティースに当接する第２延設部とが設けられ、
前記第２ティースに対して内周側から前記第２ボビンを外挿する第１工程と、
前記第１工程の後に、前記第１ティースに対して内周側から前記第１ボビンを外挿する第２工程と、を含む、
回転電機のコアの製造方法。 A core body integrally formed with a plurality of teeth projecting from a cylindrical portion and an inner peripheral surface of the cylindrical portion toward the central axis and spaced apart in the circumferential direction; and a plurality of bobbins wound with coils A method for manufacturing a core of a rotating electrical machine in which the bobbin is mounted on the teeth,
The teeth include first teeth and second teeth alternately provided with the first teeth and every other one in the circumferential direction,
The bobbin includes a first bobbin attached to the first tooth and a second bobbin attached to the second tooth,
The first bobbin is in contact with the first teeth on which the first bobbin is mounted, and extends along the circumferential direction, and extends along the circumferential direction and contacts the second teeth. A second extending portion is provided,
A first step of extrapolating the second bobbin from the inner peripheral side with respect to the second teeth;
A second step of extrapolating the first bobbin from the inner peripheral side with respect to the first tooth after the first step;
A method for manufacturing a core of a rotating electrical machine.
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