JP5315364B2 - Permanent magnet type rotating electrical machine rotor - Google Patents

Permanent magnet type rotating electrical machine rotor Download PDF

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JP5315364B2
JP5315364B2 JP2011023727A JP2011023727A JP5315364B2 JP 5315364 B2 JP5315364 B2 JP 5315364B2 JP 2011023727 A JP2011023727 A JP 2011023727A JP 2011023727 A JP2011023727 A JP 2011023727A JP 5315364 B2 JP5315364 B2 JP 5315364B2
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permanent magnet
rotor
rotor shaft
wedge
groove
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JP2012165552A (en
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知幸 岩崎
信一郎 栃尾
宏基 嶋屋
貴裕 黒岩
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西芝電機株式会社
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本発明は、永久磁石を用いたモータや発電機等の永久磁石式回転電機の回転子に関する。   The present invention relates to a rotor of a permanent magnet type rotating electrical machine such as a motor or a generator using a permanent magnet.

直流機、同期機や誘導機などの回転電機は、固定子と回転子を備え、電磁誘導の原理を利用して電気エネルギーと機械エネルギーとを相互に変換する機能を有する。回転電機の回転子は磁界を発生させ、その磁界が固定子に備えられた巻線と鎖交することによる電磁誘導によって固定子巻線に電圧が発生する。この現象を利用したものが発電機である。   A rotating electrical machine such as a DC machine, a synchronous machine, or an induction machine includes a stator and a rotor, and has a function of mutually converting electrical energy and mechanical energy using the principle of electromagnetic induction. The rotor of the rotating electrical machine generates a magnetic field, and a voltage is generated in the stator winding by electromagnetic induction caused by the magnetic field interlinking with the winding provided in the stator. A generator using this phenomenon is a generator.

また、発電機とは逆に固定子巻線に電流を流すことで磁界を発生させ、この磁界が回転子に作用することで回転子に回転力が生じる。この現象を利用したものが電動機である。   In contrast to the generator, a magnetic field is generated by passing a current through the stator winding, and a rotational force is generated in the rotor by the magnetic field acting on the rotor. An electric motor uses this phenomenon.

回転子における磁界の発生方法としては、回転子に巻線を設け、その巻線に電流を流す方法のほかに、永久磁石によって磁界を発生させる方法がある。後者は永久磁石式と呼ばれる。   As a method for generating a magnetic field in the rotor, there is a method in which a magnetic field is generated by a permanent magnet in addition to a method in which a winding is provided in the rotor and a current is passed through the winding. The latter is called a permanent magnet type.

永久磁石式回転電機の回転子は、回転子軸と、その回転子軸の外周に配置される複数の永久磁石と、前記回転子軸の外周に嵌合されて前記永久磁石を覆う円筒状の保持環と、を備えている。保持環は、高速回転時における永久磁石の飛散を防止するために永久磁石を保持可能に形成されている。   The rotor of the permanent magnet type rotating electrical machine includes a rotor shaft, a plurality of permanent magnets disposed on the outer periphery of the rotor shaft, and a cylindrical shape that is fitted on the outer periphery of the rotor shaft and covers the permanent magnet. A retaining ring. The holding ring is formed so as to be able to hold the permanent magnets in order to prevent the permanent magnets from scattering during high-speed rotation.

永久磁石は、回転子軸の外周側に固定される。なお、このような永久磁石の固定としては、保持環を回転子軸に焼き嵌めしてその保持環で永久磁石を締め付けて固定する構成、回転子軸を冷して保持環に冷し嵌めを行い、その後回転子軸の膨張で永久磁石を締め付けて固定する構成、又は、焼き嵌めと冷し嵌めを併用する構成が知られている。   The permanent magnet is fixed to the outer peripheral side of the rotor shaft. Such permanent magnets can be fixed by shrink-fitting the retaining ring to the rotor shaft and tightening the permanent magnet with the retaining ring, and cooling the rotor shaft to the retaining ring. A configuration in which the permanent magnet is tightened and fixed by expansion of the rotor shaft after that, or a configuration in which shrink fitting and cold fitting are used in combination is known.

また、保持環で締め付けて固定する構成以外にも、金属線やカーボンファイバー製の糸で永久磁石を回転子軸に締め付けるように巻き付けて固定する構成も知られている。   In addition to a configuration in which a permanent ring is fastened and fixed, a configuration in which a permanent magnet is wound around and fixed to a rotor shaft with a metal wire or carbon fiber thread is also known.

これら永久磁石を締め付けて固定する構成は、回転電機の運転中に回転子軸から永久磁石が浮き上がらないように、運転中に発生する遠心力および運転中の温度上昇を考慮した永久磁石の締め付け力を定める必要がある。   These permanent magnets are clamped and fixed in order to prevent the permanent magnets from floating from the rotor shaft during the operation of the rotating electrical machine. It is necessary to determine.

特に、回転速度が速く、回転電機の遠心力が大きい回転電機や、温度上昇の大きな回転電機では、永久磁石の締め付け力をより大きなものとする必要がある。   In particular, in a rotating electrical machine having a high rotational speed and a large centrifugal force of the rotating electrical machine or a rotating electrical machine having a large temperature rise, it is necessary to increase the clamping force of the permanent magnet.

また、永久磁石を接着剤で固定する構成も知られている。以下、従来の技術に係る接着剤で永久磁石１１２を固定する回転子１００の構成を図１２乃至図１６を参照して説明する。   A configuration in which a permanent magnet is fixed with an adhesive is also known. Hereinafter, the configuration of the rotor 100 that fixes the permanent magnet 112 with an adhesive according to the conventional technology will be described with reference to FIGS. 12 to 16.

図１２乃至図１４に示すように、回転子１００は、回転子軸１１０と、この回転子軸１１０の外周を覆う円筒状の保持環１１１と、回転子軸１１０と保持環１１１との間の隙間内に回転子軸１１０の周方向に沿って環状に複数配置された永久磁石１１２と、を備えている。   As shown in FIGS. 12 to 14, the rotor 100 includes a rotor shaft 110, a cylindrical holding ring 111 that covers the outer periphery of the rotor shaft 110, and a space between the rotor shaft 110 and the holding ring 111. A plurality of permanent magnets 112 arranged annularly along the circumferential direction of the rotor shaft 110 in the gap.

図１５に示すように、回転子軸１１０は、軸部１１６と、磁石装着部１１７と、第１嵌合部１１８と、を備えている。磁石装着部１１７は、軸部１１６の軸方向の一部の全周であって、軸部１１６に一体に形成され、その外周に複数の永久磁石１１２が固定される。第１嵌合部１１８は、磁石装着部１１７の一端側に設けられ、軸部１１６に一体に形成される。   As shown in FIG. 15, the rotor shaft 110 includes a shaft portion 116, a magnet mounting portion 117, and a first fitting portion 118. The magnet mounting portion 117 is the entire circumference of a part of the shaft portion 116 in the axial direction, and is integrally formed with the shaft portion 116, and a plurality of permanent magnets 112 are fixed to the outer periphery thereof. The first fitting portion 118 is provided on one end side of the magnet mounting portion 117 and is formed integrally with the shaft portion 116.

図１５に示すように、保持環１１１は、その一端側に、その内径が他端側の内径よりも小さく形成された第２嵌合部１２１が形成されている。回転子軸１１０は、第１嵌合部１１８の外周に保持環１１１の第２嵌合部１２１が嵌合される。   As shown in FIG. 15, the holding ring 111 is formed with a second fitting portion 121 having an inner diameter smaller than an inner diameter on the other end side on one end side. The rotor shaft 110 is fitted with the second fitting portion 121 of the retaining ring 111 on the outer periphery of the first fitting portion 118.

図１６に示すように、永久磁石１１２は、回転子１００の組立時に保持環１１１の内周面と回転子軸１１０の磁石装着部１１７の外周面との間に配置される。図１４に示すように、回転子軸１１０と保持環１１１との間隔Ｔは永久磁石１１２の厚みＴｍよりも広く形成されている。また、間隔Ｔ及び厚みＴｍは、回転子軸１１０と永久磁石１１２との間に隙間ｄ（ｄ＝Ｔ−Ｔｍ）が確保可能に形成されている。   As shown in FIG. 16, the permanent magnet 112 is disposed between the inner peripheral surface of the retaining ring 111 and the outer peripheral surface of the magnet mounting portion 117 of the rotor shaft 110 when the rotor 100 is assembled. As shown in FIG. 14, the interval T between the rotor shaft 110 and the retaining ring 111 is formed wider than the thickness Tm of the permanent magnet 112. The interval T and the thickness Tm are formed such that a gap d (d = T−Tm) can be secured between the rotor shaft 110 and the permanent magnet 112.

永久磁石１１２は、回転子軸１１０又は保持環１１１に固定されている。具体的には、永久磁石１１２は、主面の一方、図１４中では上面に、接着剤を塗布する塗布面１１２ａが形成される。   The permanent magnet 112 is fixed to the rotor shaft 110 or the holding ring 111. Specifically, the permanent magnet 112 has an application surface 112a on which an adhesive is applied on the upper surface in FIG.

永久磁石１１２は、塗布面１１２ａに塗布された接着剤により、保持環１１１に固定される。なお、塗布面１１２ａを図１４中下面に設け、永久磁石１１２を回転子軸１１０に固定させる構成であってもよい。   The permanent magnet 112 is fixed to the holding ring 111 by an adhesive applied to the application surface 112a. The application surface 112a may be provided on the lower surface in FIG. 14 and the permanent magnet 112 may be fixed to the rotor shaft 110.

このように、永久磁石１１２は、永久磁石１１２と保持環１１１の間に接着剤を介在させ、当該接着剤の接着力により、保持環１１１の内周面に接着固定される。   As described above, the permanent magnet 112 is bonded and fixed to the inner peripheral surface of the holding ring 111 by interposing an adhesive between the permanent magnet 112 and the holding ring 111 and using the adhesive force of the adhesive.

回転電機が発電機又は電動機として運転されるときには、図１４に示すように永久磁石１１２に回転トルクＭが作用する。当該回転トルクＭは、接着面を介して回転子軸１１０又は保持環１１１に伝達されることとなる。このようにして、回転子１００は、その運転中に永久磁石１１２にかかる遠心力を保持環１１１の内周面で受け止め可能に形成される。   When the rotating electrical machine is operated as a generator or an electric motor, rotational torque M acts on the permanent magnet 112 as shown in FIG. The rotational torque M is transmitted to the rotor shaft 110 or the holding ring 111 via the adhesive surface. In this way, the rotor 100 is formed so that the centrifugal force applied to the permanent magnet 112 during its operation can be received by the inner peripheral surface of the retaining ring 111.

さらに、永久磁石を締め付けて固定する構成や接着剤により固定する構成以外の構成として、永久磁石式回転電機の回転子において、回転子軸と永久磁石に凹部を設け、その凹部にキー等のトルク伝達部を設ける構成も知られている（例えば、特許文献１参照）。   Further, as a configuration other than a configuration in which the permanent magnet is tightened and fixed, or a configuration in which the permanent magnet is fixed with an adhesive, in the rotor of the permanent magnet type rotating electrical machine, a recess is provided in the rotor shaft and the permanent magnet, and torque such as a key is provided in the recess. The structure which provides a transmission part is also known (for example, refer patent document 1).

特開２００４−１７３３４１号公報JP 2004-173341 A

上述した永久磁石式回転電機の回転子では、次のような問題があった。永久磁石を保持環などにより締め付けて固定する構成においては、その締め付け力を適正に管理する必要がある。即ち、締め付け力が過大となり、永久磁石に許容応力を超える過大な応力が発生すると、回転子の製造中や運転中に永久磁石が破損する虞がある。   The rotor of the permanent magnet type rotating electrical machine described above has the following problems. In a configuration in which the permanent magnet is fastened and fixed by a retaining ring or the like, it is necessary to appropriately manage the fastening force. That is, if the tightening force becomes excessive and excessive stress exceeding the allowable stress is generated in the permanent magnet, the permanent magnet may be damaged during manufacture or operation of the rotor.

また、接着剤により永久磁石を固定する構成においては、回転電機の運転中の温度変化によって接着剤が劣化する虞がある。接着剤が劣化すると、その接着力が低下し、永久磁石に作用する回転トルクで永久磁石が保持環に固定されなくなる虞もある。   Moreover, in the structure which fixes a permanent magnet with an adhesive agent, there exists a possibility that an adhesive agent may deteriorate by the temperature change during operation | movement of a rotary electric machine. When the adhesive is deteriorated, the adhesive force is reduced, and the permanent magnet may not be fixed to the holding ring by the rotational torque acting on the permanent magnet.

これらのように、永久磁石の破損や、永久磁石が回転子軸に固定されない状態での回転電機の駆動では、回転電機を適切に運転することができなくなる。そこで、確実に適切な運転ができる、高い信頼性の回転子が求められている。   As described above, when the rotating electric machine is driven in a state where the permanent magnet is damaged or the permanent magnet is not fixed to the rotor shaft, the rotating electric machine cannot be operated appropriately. Therefore, there is a demand for a highly reliable rotor that can reliably operate properly.

また、特許文献１に開示された構成では、トルク伝達部を介して回転トルクの伝達が達成されるため、永久磁石を保持環や回転子軸に固定する必要がない。しかし、回転子の組立を可能にするために、回転子軸と保持環との間の間隔は、永久磁石の厚みよりも大きく形成される。このため、回転電機の運転時に永久磁石が回転子軸の径方向に移動する虞がある。   Further, in the configuration disclosed in Patent Document 1, since transmission of rotational torque is achieved via the torque transmission unit, it is not necessary to fix the permanent magnet to the holding ring or the rotor shaft. However, in order to enable assembly of the rotor, the distance between the rotor shaft and the retaining ring is formed larger than the thickness of the permanent magnet. For this reason, there exists a possibility that a permanent magnet may move to the radial direction of a rotor axis | shaft at the time of a driving | operation of a rotary electric machine.

換言すると、永久磁石は、固定されていないため、運転中に遠心力によって保持環側に移動する虞がある。運転中に永久磁石が移動すると、回転子の回転釣り合いが変化し、回転動作が不安定となって振動や騒音の原因となる。   In other words, since the permanent magnet is not fixed, it may move to the holding ring side by centrifugal force during operation. If the permanent magnet moves during operation, the rotation balance of the rotor changes, and the rotation operation becomes unstable, causing vibration and noise.

そこで本発明は、永久磁石を固定可能、且つ、信頼性の高い永久磁石式回転電機の回転子を提供することを目的とする。   Therefore, an object of the present invention is to provide a rotor of a permanent magnet type rotating electrical machine that can fix a permanent magnet and has high reliability.

前記課題を解決し目的を達成するために、本発明の永久磁石式回転電機の回転子は、次のように構成されている。   In order to solve the above-described problems and achieve the object, the rotor of the permanent magnet type rotating electric machine of the present invention is configured as follows.

本発明の一態様として、その軸方向に沿って延びる第１溝部がその外周に複数形成された回転子軸と、その内面に前記第１溝部のうち隣り合う２つとそれぞれ対向する２つの第２溝部が形成され、前記回転子軸の外周に、前記回転子軸の周方向に沿って環状に複数配置される永久磁石と、前記回転子軸の外周に嵌合されて前記永久磁石を覆う保持環と、前記第１溝部と前記第２溝部が対向することで形成される空間に一つ置きにそれぞれ挿入され、前記永久磁石を前記保持環の内周面に接触させて固定する楔部材と、を備え、前記回転子軸と前記保持環を嵌合後に、前記第１溝部に一つ置きに前記空間と略同一形状の案内レールを挿入し、前記案内レールに前記永久磁石の前記第２溝部の一方を案内させて前記回転子軸と前記保持環の間に前記永久磁石を挿入後、前記楔部材を挿入する。   As one aspect of the present invention, a rotor shaft in which a plurality of first groove portions extending along the axial direction are formed on the outer periphery, and two second surfaces respectively opposed to two adjacent ones of the first groove portions on the inner surface thereof. A groove is formed, and a plurality of permanent magnets arranged annularly along the circumferential direction of the rotor shaft on the outer periphery of the rotor shaft, and a holder fitted to the outer periphery of the rotor shaft to cover the permanent magnet A wedge member that is inserted into every other space formed by the ring, the first groove portion and the second groove portion facing each other, and fixes the permanent magnet in contact with the inner peripheral surface of the holding ring; After the rotor shaft and the retaining ring are fitted, guide rails having substantially the same shape as the space are inserted into the first groove portions, and the second permanent magnets are inserted into the guide rails. Guide one side of the groove between the rotor shaft and the retaining ring After inserting a permanent magnet, inserting the wedge member.

本発明の一態様として、その軸方向に沿って延びる第１溝部がその外周に複数形成された回転子軸と、前記回転子軸の外周に、前記回転子軸の周方向に沿って環状に複数配置される永久磁石と、前記永久磁石の内面の中央側、及び、隣り合って配置された前記永久磁石の隣接する端部間の内面にそれぞれ形成された、前記第１溝部と対向する第２溝部と、前記回転子軸の外周に嵌合されて前記永久磁石を覆う保持環と、前記第１溝部と前記第２溝部が対向することで形成される空間に一つ置きにそれぞれ挿入され、前記永久磁石を前記保持環の内周面に接触させて固定する楔部材と、を備え、前記回転子軸と前記保持環を嵌合後に、前記第１溝部に一つ置きに前記空間と略同一形状の案内レールを挿入し、前記案内レールに前記第２溝部を一つ置きに案内させて前記回転子軸と前記保持環の間に前記永久磁石を挿入後、前記楔部材を挿入する。 As one aspect of the present invention, a plurality of first groove portions extending along the axial direction are formed on the outer periphery of the rotor shaft, and the outer periphery of the rotor shaft is annularly formed along the circumferential direction of the rotor shaft. a permanent magnet that will be more disposed, the center side of the inner surface of the permanent magnet, and, respectively formed on the inner surface between adjacent ends of said permanent magnets arranged adjacent, facing the first groove The second groove part, the retaining ring that is fitted to the outer periphery of the rotor shaft and covers the permanent magnet, and the space formed by the first groove part and the second groove part facing each other are inserted every other. And a wedge member that contacts and fixes the permanent magnet to the inner peripheral surface of the holding ring, and after the rotor shaft and the holding ring are fitted, the space is alternately placed in the first groove portion. first and insert the guide rails of substantially the same shape, the second groove before SL on the guide rail After the permanent magnet by guided between the holding ring and the rotor shaft every insertion, to insert the wedge member.

本発明によれば、永久磁石を固定可能、且つ、信頼性の高い永久磁石式回転電機の回転子を提供することが可能となる。   ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the rotor of a permanent magnet type rotary electric machine which can fix a permanent magnet and has high reliability.

本発明の第１の実施形態に係る永久磁石式回転電機の回転子の構成を示す斜視図。The perspective view which shows the structure of the rotor of the permanent magnet type rotary electric machine which concerns on the 1st Embodiment of this invention. 同回転子の構成を示す平面図。The top view which shows the structure of the same rotor. 同回転子の構成を示す断面図。Sectional drawing which shows the structure of the rotor. 同回転子の要部構成を拡大して示す平面図。The top view which expands and shows the principal part structure of the same rotor. 同回転子に用いられる回転子軸の構成を示す斜視図。The perspective view which shows the structure of the rotor axis | shaft used for the same rotor. 同回転子に用いられる保持環の構成を示す斜視図。The perspective view which shows the structure of the holding ring used for the same rotor. 同回転子に用いられる永久磁石の構成を示す斜視図。The perspective view which shows the structure of the permanent magnet used for the rotor. 同回転子の製造工程の一を示す平面図。The top view which shows one of the manufacturing processes of the same rotor. 本発明の第２の実施形態に係る永久磁石式回転電機の回転子の構成を示す断面図。Sectional drawing which shows the structure of the rotor of the permanent-magnet-type rotary electric machine which concerns on the 2nd Embodiment of this invention. 同回転子に用いられる回転子軸の構成を示す斜視図。The perspective view which shows the structure of the rotor axis | shaft used for the same rotor. 本発明の変形例に係る永久磁石式回転電機の回転子の要部構成を拡大して示す平面図。The top view which expands and shows the principal part structure of the rotor of the permanent magnet type rotary electric machine which concerns on the modification of this invention. 従来の技術に係る永久磁石式回転電機の回転子の構成を示す斜視図。The perspective view which shows the structure of the rotor of the permanent magnet type rotary electric machine which concerns on a prior art. 同回転子の構成を示す平面図。The top view which shows the structure of the same rotor. 同回転子の要部構成を拡大して示す平面図。The top view which expands and shows the principal part structure of the same rotor. 同回転子に用いられる回転子軸及び保持環の構成を示す斜視図。The perspective view which shows the structure of the rotor axis | shaft and holding ring which are used for the same rotor. 同回転子に用いられる永久磁石の構成を示す斜視図。The perspective view which shows the structure of the permanent magnet used for the rotor.

（第１の実施形態）
以下、本発明の第１の実施形態について図１乃至図８を用いて説明する。 (First embodiment)
A first embodiment of the present invention will be described below with reference to FIGS.

図１は本発明の第１の実施形態に係る永久磁石式回転電機に用いられる回転子１の構成を示す斜視図、図２は回転子１の構成を図１中矢視ＩＩで示す平面図、図３は回転子１の構成を、図２中ＩＩＩ−ＩＩＩ断面で示す断面図、図４は回転子１の要部構成、特に、回転子軸１０、保持環１１及び永久磁石１２の構成を拡大して示す平面図、図５は回転子１に用いられる回転子軸１０の構成を示す斜視図、図６は保持環１１の構成を示す斜視図、図７は回転子１に用いられる永久磁石１２の構成を示す斜視図、図８は回転子１の製造工程の一を示す平面図である。   FIG. 1 is a perspective view showing a configuration of a rotor 1 used in the permanent magnet type rotating electrical machine according to the first embodiment of the present invention. FIG. 2 is a plan view showing the configuration of the rotor 1 as indicated by an arrow II in FIG. FIG. 3 is a cross-sectional view showing the configuration of the rotor 1, taken along the line III-III in FIG. 2, and FIG. 4 is the main configuration of the rotor 1. FIG. 5 is a perspective view showing the configuration of the rotor shaft 10 used in the rotor 1, FIG. 6 is a perspective view showing the configuration of the holding ring 11, and FIG. 7 is a permanent view used in the rotor 1. FIG. 8 is a plan view showing one manufacturing process of the rotor 1.

回転子１は、発電機や電動機等の永久磁石式回転電機に用いられる。図１に示すように、回転子１は、回転子軸１０と、保持環１１と、永久磁石１２と、楔部材１３と、を備えている。   The rotor 1 is used in a permanent magnet type rotating electrical machine such as a generator or an electric motor. As shown in FIG. 1, the rotor 1 includes a rotor shaft 10, a holding ring 11, a permanent magnet 12, and a wedge member 13.

図１乃至図７に示すように、回転子軸１０は、軸部１６と、磁石装着部１７と、第１嵌合部１８と、を備えている。軸部１６は、永久磁石式回転電機の回転軸を形成する。   As shown in FIGS. 1 to 7, the rotor shaft 10 includes a shaft portion 16, a magnet mounting portion 17, and a first fitting portion 18. The shaft portion 16 forms a rotating shaft of a permanent magnet type rotating electrical machine.

磁石装着部１７は、その外周に複数の永久磁石１２が固定される。磁石装着部１７は、軸部１６に一体に形成されている。磁石装着部１７は、軸部１６の軸方向の一部の全周に設けられる。磁石装着部１７は、その外周に複数の第１溝部１９が形成されている。   The magnet mounting portion 17 has a plurality of permanent magnets 12 fixed to the outer periphery thereof. The magnet mounting portion 17 is formed integrally with the shaft portion 16. The magnet mounting portion 17 is provided on the entire circumference of a part of the shaft portion 16 in the axial direction. The magnet mounting portion 17 has a plurality of first groove portions 19 formed on the outer periphery thereof.

第１溝部１９は、回転子軸１０の軸方向に沿って磁石装着部１７に延設されている。第１溝部１９は、磁石装着部１７の周方向に均等に配置されている。なお、第１溝部１９は、磁石装着部１７に固定される永久磁石１２一つに対して二つ設けられる。   The first groove portion 19 extends from the magnet mounting portion 17 along the axial direction of the rotor shaft 10. The first groove portions 19 are evenly arranged in the circumferential direction of the magnet mounting portion 17. Two first groove portions 19 are provided for one permanent magnet 12 fixed to the magnet mounting portion 17.

第１嵌合部１８は、磁石装着部１７の一端側に設けられ、軸部１６に一体に形成される。第１嵌合部１８は、その外径が磁石装着部１７の外径よりも大径に形成されている。   The first fitting portion 18 is provided on one end side of the magnet mounting portion 17 and is formed integrally with the shaft portion 16. The first fitting part 18 has an outer diameter larger than the outer diameter of the magnet mounting part 17.

保持環１１は、円筒状に形成され、回転子軸１０を挿入可能な内径に形成されている。保持環１１は、その一端側に、その内径が他端側の内径よりも小さく形成された第２嵌合部２１を備えている。保持環１１は、回転子軸１０の挿入時に、第２嵌合部２１が回転子軸１０の第１嵌合部１８と嵌合可能に形成されている。即ち、保持環１１は、その第２嵌合部２１が第１嵌合部１８と嵌合することで、その内部に回転子軸１０を固定可能に形成されている。   The holding ring 11 is formed in a cylindrical shape and has an inner diameter into which the rotor shaft 10 can be inserted. The holding ring 11 includes a second fitting portion 21 having an inner diameter smaller than an inner diameter on the other end side on one end side. The retaining ring 11 is formed so that the second fitting portion 21 can be fitted to the first fitting portion 18 of the rotor shaft 10 when the rotor shaft 10 is inserted. That is, the retaining ring 11 is formed so that the rotor shaft 10 can be fixed therein by fitting the second fitting portion 21 with the first fitting portion 18.

なお、保持環１１に回転子軸１０を挿入した場合に、回転子軸１０の磁石装着部１７の外周面と、保持環１１の内周面との間の隙間の間隔寸法は永久磁石１２の厚さよりも若干大きい寸法となるように、磁石装着部１７の外径及び／又は保持環１１の内径が形成されている。   When the rotor shaft 10 is inserted into the retaining ring 11, the gap dimension between the outer peripheral surface of the magnet mounting portion 17 of the rotor shaft 10 and the inner peripheral surface of the retaining ring 11 is the same as that of the permanent magnet 12. The outer diameter of the magnet mounting portion 17 and / or the inner diameter of the holding ring 11 is formed so as to have a size slightly larger than the thickness.

図７に示すように、永久磁石１２は、その外面及び内面が湾曲することで、その端面が扇状に形成された短冊状に形成されている。永久磁石１２は、その内面に第２溝部２３が２つ形成されている。   As shown in FIG. 7, the permanent magnet 12 is formed in a strip shape in which the outer surface and the inner surface are curved so that the end surface is formed in a fan shape. The permanent magnet 12 has two second groove portions 23 formed on the inner surface thereof.

永久磁石１２は、回転子軸１０の磁石装着部１７の外周面と保持環１１の内周面との間に形成される隙間内に、回転子軸１０の周方向に沿って環状に並ぶように複数配置される。なお、永久磁石１２は、磁石装着部１７及び保持環１１の隙間に配置させる場合には、回転子軸１０及び保持環１１の第１、第２嵌合部１８，２１による嵌合部とは反対側から挿入される。   The permanent magnets 12 are arranged in a ring along the circumferential direction of the rotor shaft 10 in a gap formed between the outer peripheral surface of the magnet mounting portion 17 of the rotor shaft 10 and the inner peripheral surface of the retaining ring 11. A plurality are arranged. When the permanent magnet 12 is disposed in the gap between the magnet mounting portion 17 and the holding ring 11, what are the fitting portions by the first and second fitting portions 18 and 21 of the rotor shaft 10 and the holding ring 11? Inserted from the opposite side.

第２溝部２３は、その断面が矩形状であって、永久磁石１２の長手方向に沿って連続して形成される。第２溝部２３は、永久磁石１２が回転子軸１０に複数環状に配置された場合に、回転子軸１０の磁石装着部１７の第１溝部１９とそれぞれ対向可能に永久磁石１２の内面に設けられている。   The second groove portion 23 has a rectangular cross section and is continuously formed along the longitudinal direction of the permanent magnet 12. The second groove portion 23 is provided on the inner surface of the permanent magnet 12 so as to be able to face the first groove portion 19 of the magnet mounting portion 17 of the rotor shaft 10 when the permanent magnets 12 are arranged in a plurality of rings on the rotor shaft 10. It has been.

なお、一つの永久磁石１２に設けられる第２溝部２３，２３は、それぞれ第１溝部１９，１９と対向することで、楔部材１３、及び、後述する後述する永久磁石１２の組み立てにおいて永久磁石１２の位置決めを行う位置決めレール５０がそれぞれ挿入される空間を形成する。ここで、第１溝部１９，１９及び第２溝部２３，２３により形成される空間は、同一形状に形成された空間であるが、説明の便宜上、楔部材１３が挿入される空間を空間部３１とし、位置決めレール５０が挿入される空間を空間部３２として、以下説明する。   In addition, the 2nd groove parts 23 and 23 provided in one permanent magnet 12 oppose the 1st groove parts 19 and 19, respectively, and the permanent magnet 12 in the assembly of the wedge member 13 and the permanent magnet 12 mentioned later mentioned later. A space into which the positioning rails 50 for positioning are inserted is formed. Here, the space formed by the first groove portions 19 and 19 and the second groove portions 23 and 23 is a space formed in the same shape, but for convenience of explanation, the space in which the wedge member 13 is inserted is the space portion 31. In the following, the space 32 into which the positioning rail 50 is inserted will be described as the space portion 32.

楔部材１３は、永久磁石１２を固定可能に形成されている。楔部材１３は、第１の楔材２６と、第２の楔材２７と、固定部２８と、を備えている。第１の楔材２６及び第２の楔材２７は、略同一角度の傾斜を有する楔であって、その幅が第１溝部１９及び第２溝部２３と略同一幅に形成されている。   The wedge member 13 is formed so that the permanent magnet 12 can be fixed. The wedge member 13 includes a first wedge material 26, a second wedge material 27, and a fixing portion 28. The first wedge member 26 and the second wedge member 27 are wedges having an inclination of substantially the same angle, and the width thereof is formed to be substantially the same as that of the first groove portion 19 and the second groove portion 23.

第１の楔材２６及び第２の楔材２７は、組み合わさることで、永久磁石１２が保持環１１の内周面に接するときに磁石装着部１７の第１溝部１９と永久磁石１２の第２溝部２３で形成される空間部３１と略同一形状の矩形板状に形成される。このような第１の楔材２６及び第２の楔材２７は、当該空間部３１に挿入可能に形成されている。   By combining the first wedge member 26 and the second wedge member 27, the first groove portion 19 of the magnet mounting portion 17 and the first portion of the permanent magnet 12 when the permanent magnet 12 contacts the inner peripheral surface of the retaining ring 11 are combined. It is formed in a rectangular plate shape having substantially the same shape as the space portion 31 formed by the two groove portions 23. The first wedge material 26 and the second wedge material 27 are formed so as to be insertable into the space 31.

第１の楔材２６及び第２の楔材２７は、図４に示すように、組み合わさることで、その高さ寸法Ｈが第１、第２溝部１９，２３により形成される空間部３１の高さ寸法Ｈｓと略同一寸法に形成される。   As shown in FIG. 4, the first wedge member 26 and the second wedge member 27 are combined so that the height dimension H of the space portion 31 formed by the first and second groove portions 19 and 23 is reduced. It is formed to have substantially the same dimension as the height dimension Hs.

固定部２８は、空間部３１に挿入された一対の第１、第２楔材２６，２７が互いに動かないように固定可能に形成されている。例えば、固定部２８は、第１、第２楔材２６，２７が互いに動かないように溶接した溶接部である。   The fixing portion 28 is formed so as to be fixed so that the pair of first and second wedge members 26 and 27 inserted into the space portion 31 do not move relative to each other. For example, the fixed portion 28 is a welded portion that is welded so that the first and second wedge members 26 and 27 do not move relative to each other.

次に、このように構成された永久磁石式回転電機の回転子１の製造方法の一である、回転子１の組み立て方法について説明する。
先ず、回転子軸１０を保持環１１に挿入し、第１嵌合部１８及び第２嵌合部２１を嵌合させて、回転子軸１０及び保持環１１を固定させる。次に、回転子軸１０に設けられた磁石装着部１７の第１溝部１９に一つ置きに、位置決めレール５０を挿入する。 Next, a method for assembling the rotor 1, which is one method for manufacturing the rotor 1 of the permanent magnet type rotating electrical machine configured as described above, will be described.
First, the rotor shaft 10 is inserted into the holding ring 11, the first fitting portion 18 and the second fitting portion 21 are fitted, and the rotor shaft 10 and the holding ring 11 are fixed. Next, positioning rails 50 are inserted into every other first groove portion 19 of the magnet mounting portion 17 provided on the rotor shaft 10.

なお、図８に示すように、位置決めレール５０は、その高さＨＲが、第１溝部１９の高さをＨｘ、第２溝部２３の高さをＨｙ及び磁石装着部１７の外周面と永久磁石１２の内周面との隙間をＳとした場合に、ＨＲ＝Ｈｘ＋Ｈｙ＋Ｓとなる。   As shown in FIG. 8, the positioning rail 50 has a height HR of Hx as the height of the first groove portion 19, Hy as the height of the second groove portion 23, and the outer peripheral surface of the magnet mounting portion 17 and the permanent magnet. When the gap between the inner peripheral surface of 12 is S, HR = Hx + Hy + S.

即ち、位置決めレール５０の高さＨＲは、第１溝部１９，２３により形成される空間部３２の高さＨｓと略同一寸法に形成される。また、位置決めレール５０は、その長さが、第１溝部１９，２３の長さ寸法と略同一に形成されている。   That is, the height HR of the positioning rail 50 is formed to have substantially the same dimension as the height Hs of the space portion 32 formed by the first groove portions 19 and 23. Further, the length of the positioning rail 50 is substantially the same as the length dimension of the first groove portions 19 and 23.

位置決めレール５０を第１溝部１９に一つ置きに配置後、永久磁石１２を磁石装着部１７に配置させる。具体的には、永久磁石１２に設けられた二つの第２溝部２３のうち空間部３２を形成する一方の第２溝部２３を位置決めレール５０に案内させながら、磁石装着部１７及び保持環１１の隙間に永久磁石１２を挿入させる。このように、永久磁石１２の一方の第２溝部２３を位置決めレール５０に案内させて永久磁石１２の位置決めを行いながら、複数の永久磁石１２を回転子軸１０の周方向に沿って環状に配置させる。   After the positioning rails 50 are arranged in the first groove portion 19 every other position, the permanent magnets 12 are arranged in the magnet mounting portion 17. Specifically, of the two second groove portions 23 provided in the permanent magnet 12, one of the second groove portions 23 forming the space portion 32 is guided to the positioning rail 50, while the magnet mounting portion 17 and the holding ring 11. The permanent magnet 12 is inserted into the gap. In this way, while positioning the permanent magnet 12 by guiding the one second groove 23 of the permanent magnet 12 to the positioning rail 50, the plurality of permanent magnets 12 are annularly arranged along the circumferential direction of the rotor shaft 10. Let

回転子軸１０の全周に永久磁石１２を配置後、位置決めレール５０が挿入されていない他方の第１溝部１９，２３により形成された空間部３１に楔部材１３を打ち込む。   After the permanent magnet 12 is arranged on the entire circumference of the rotor shaft 10, the wedge member 13 is driven into the space portion 31 formed by the other first groove portions 19 and 23 in which the positioning rail 50 is not inserted.

先ず、空間部３１の第１溝部１９側に第１の楔材２６が挿入され、挿入された第１の楔材２６上に第２の楔材２７が挿入される。なお、第２の楔材２７は、各永久磁石１２が保持環１１の内周面に密着するまで圧入される。即ち、第１、第２の楔材２６，２７は、互いに対向する面が傾斜して形成されるため、第２の楔材２７が圧入されると、第２の楔材２７は、圧入方向だけでなく回転子軸１０の径方向に移動することとなる。このため、第２の楔材２７の径方向の移動により、永久磁石１２が保持環１１の内周面に密着する方向に移動させることが可能となる。   First, the first wedge member 26 is inserted on the first groove 19 side of the space portion 31, and the second wedge member 27 is inserted on the inserted first wedge member 26. The second wedge material 27 is press-fitted until each permanent magnet 12 comes into close contact with the inner peripheral surface of the retaining ring 11. That is, since the first and second wedge members 26 and 27 are formed so that the surfaces facing each other are inclined, when the second wedge member 27 is press-fitted, the second wedge member 27 is inserted in the press-fitting direction. It moves not only in the radial direction of the rotor shaft 10. For this reason, the movement of the second wedge member 27 in the radial direction enables the permanent magnet 12 to move in a direction in close contact with the inner peripheral surface of the retaining ring 11.

永久磁石１２を保持環１１に密着させた後、組み合わされた第１の楔材２６と第２の楔材２７とが互いに軸方向にずれ動かないように、溶接により固定部２８で第１の楔材２６及び第２の楔材２７を固定させる。このようにして、回転子１が製造されることとなる。   After the permanent magnet 12 is brought into close contact with the holding ring 11, the first wedge member 26 and the second wedge member 27 combined with each other are not welded to each other in the axial direction by welding so that the first portion 26 is fixed by the fixing portion 28. The wedge material 26 and the second wedge material 27 are fixed. In this way, the rotor 1 is manufactured.

このように構成された永久磁石式回転電機の回転子１によれば、永久磁石１２は、保持環１１に接する程度に永久磁石１２が楔部材１３により押し付けられて固定されており、締め付けによって永久磁石を固定する従来の構成とは異なり、永久磁石１２に過大な応力が印可することを防止できる。このため、回転子１は、永久磁石１２の破損を防止することができる。   According to the rotor 1 of the permanent magnet type rotating electrical machine configured as described above, the permanent magnet 12 is fixed by pressing the permanent magnet 12 with the wedge member 13 to the extent that the permanent magnet 12 is in contact with the holding ring 11. Unlike the conventional configuration in which the magnet is fixed, it is possible to prevent an excessive stress from being applied to the permanent magnet 12. For this reason, the rotor 1 can prevent the permanent magnet 12 from being damaged.

また、永久磁石１２は、楔部材１３により保持環１１の内面に密着する構成であり、このため、回転子軸１０と永久磁石１２との間には僅かな隙間が生ずることとなる。しかし、運転中に永久磁石１２に発生する回転トルクＭは、永久磁石１２の第２溝部２３と回転子軸１０の第１溝部１９とに跨って配置された楔部材１３を介して回転子軸１０に伝達される。これにより、回転子１が用いられた永久磁石式回転電機の駆動時に、永久磁石１２と回転子軸１０のとの間で空転が生じることがない。   Further, the permanent magnet 12 is configured to be in close contact with the inner surface of the holding ring 11 by the wedge member 13, and therefore, a slight gap is generated between the rotor shaft 10 and the permanent magnet 12. However, the rotational torque M generated in the permanent magnet 12 during operation is transmitted to the rotor shaft via the wedge member 13 disposed across the second groove portion 23 of the permanent magnet 12 and the first groove portion 19 of the rotor shaft 10. 10 is transmitted. Thereby, idling does not occur between the permanent magnet 12 and the rotor shaft 10 when the permanent magnet type rotating electrical machine using the rotor 1 is driven.

また、楔部材１３を構成する一対の第１、第２の楔材２６，２７は固定部２８によって軸方向の動きが規制されているため、互いにずれ動くことがない。このため、永久磁石式回転電機の駆動時に、楔部材１３の高さが変化することがなく、結果、永久磁石１２は、保持環１１の内周面に向かって第２の楔材２７により常時押圧されることとなり、径方向及び回転子軸１０の軸方向に移動することがない。   Further, since the pair of first and second wedge members 26 and 27 constituting the wedge member 13 are restricted from moving in the axial direction by the fixing portion 28, they do not move with respect to each other. For this reason, the height of the wedge member 13 does not change when the permanent magnet type rotating electrical machine is driven. As a result, the permanent magnet 12 is always moved by the second wedge material 27 toward the inner peripheral surface of the holding ring 11. It is pressed and does not move in the radial direction and the axial direction of the rotor shaft 10.

即ち、永久磁石式回転電機の運転と停止を繰り返しても永久磁石１２の移動は発生せず、回転子１の回転釣り合いが変化するようなことがない。このため、回転子１は、回転動作が常に安定することとなり、回転子１の回転による振動や騒音の発生を防止することができる。   That is, even if the operation and stop of the permanent magnet type rotating electric machine are repeated, the permanent magnet 12 does not move, and the rotation balance of the rotor 1 does not change. For this reason, the rotation operation of the rotor 1 is always stable, and vibration and noise due to the rotation of the rotor 1 can be prevented.

このように、回転子軸１０及び保持環１１の間の間隔が、永久磁石１２の厚みよりも大きい構造を回転子１が有していても、楔材１３により永久磁石１２を確実に固定することで、永久磁石１２の破損を防止し、且つ、回転動作を安定して行うことで、信頼性の高い回転子１を提供することが可能となる。   Thus, even if the rotor 1 has a structure in which the distance between the rotor shaft 10 and the holding ring 11 is larger than the thickness of the permanent magnet 12, the permanent magnet 12 is securely fixed by the wedge material 13. Thus, it is possible to provide the rotor 1 with high reliability by preventing the permanent magnet 12 from being damaged and performing the rotation operation stably.

また、永久磁石１２を回転子軸１０の磁石装着部１７に装着させる場合には、永久磁石１２の一方の第１溝部１９を位置決めレール５０に案内させながら磁石装着部１７及び保持環１１の隙間に挿入すれば、永久磁石１２の装着と共に、永久磁石１２の位置合わせが可能となる。   Further, when the permanent magnet 12 is mounted on the magnet mounting portion 17 of the rotor shaft 10, the gap between the magnet mounting portion 17 and the holding ring 11 while guiding one first groove portion 19 of the permanent magnet 12 to the positioning rail 50. If it inserts in, it will become possible to align the permanent magnet 12 with the mounting of the permanent magnet 12.

即ち、永久磁石１２の第２溝部２３の一方に対応する磁石装着部１７の第１溝部１９に位置決めレール５０を予め挿入することで、永久磁石１２と磁石装着部１７との位置合わせが可能、且つ、永久磁石１２の移動を防止可能となり、楔部材１３の組み立てが容易となる。このため、回転子１の製造を容易とすることが可能となる。   That is, the positioning of the permanent magnet 12 and the magnet mounting portion 17 is possible by inserting the positioning rail 50 in advance into the first groove portion 19 of the magnet mounting portion 17 corresponding to one of the second groove portions 23 of the permanent magnet 12. In addition, the permanent magnet 12 can be prevented from moving, and the wedge member 13 can be easily assembled. For this reason, it becomes possible to make manufacture of the rotor 1 easy.

上述したように、本実施の形態の永久磁石式回転電機の回転子１によれば、永久磁石１２を位置決めレール５０で位置合わせ後、楔部材１３で保持環１１の内面に密着するように磁石装着部１７に装着させることで、その製造が容易となるとともに、永久磁石１２の固定を確実に行うことが可能、且つ、信頼性の向上が可能となる。   As described above, according to the rotor 1 of the permanent magnet type rotating electrical machine of the present embodiment, after the permanent magnet 12 is aligned with the positioning rail 50, the magnet is adhered to the inner surface of the holding ring 11 with the wedge member 13. By mounting the mounting portion 17 on the mounting portion 17, manufacturing thereof is facilitated, the permanent magnet 12 can be securely fixed, and reliability can be improved.

（第２の実施形態）
次に、本発明の第２の実施形態に係る永久磁石式回転電機の回転子１Ａについて、図９及び図１０を参照して説明する。図９は本発明の第２の実施形態に係る永久磁石式回転電機の回転子１Ａの構成を示す断面図、図１０は回転子１Ａに用いられる回転子軸１０Ａの構成を示す斜視図である。なお、第２の実施形態に係る回転子１Ａのうち、上述した第１の実施形態に係る回転子１と同様の構成には同一符号を付し、その詳細な説明は省略する。 (Second Embodiment)
Next, a rotor 1A of a permanent magnet type rotating electrical machine according to a second embodiment of the present invention will be described with reference to FIG. 9 and FIG. FIG. 9 is a cross-sectional view showing a configuration of a rotor 1A of a permanent magnet type rotating electric machine according to a second embodiment of the present invention, and FIG. 10 is a perspective view showing a configuration of a rotor shaft 10A used in the rotor 1A. . Note that, in the rotor 1A according to the second embodiment, the same components as those of the rotor 1 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

図９に示すように、回転子１Ａは、回転子軸１０Ａと、保持環１１と、永久磁石１２と、楔部材１３Ａと、を備えている。図９及び図１０に示すように、回転子軸１０Ａは、軸部１６と、磁石装着部１７Ａと、第１嵌合部１８と、を備えている。磁石装着部１７Ａは、その外周に複数の永久磁石１２が固定される。   As shown in FIG. 9, the rotor 1A includes a rotor shaft 10A, a holding ring 11, a permanent magnet 12, and a wedge member 13A. As shown in FIGS. 9 and 10, the rotor shaft 10 </ b> A includes a shaft portion 16, a magnet mounting portion 17 </ b> A, and a first fitting portion 18. A plurality of permanent magnets 12 are fixed to the outer periphery of the magnet mounting portion 17A.

磁石装着部１７Ａは、軸部１６に一体に形成されている。磁石装着部１７Ａは、軸部１６の軸方向の一部であって、回転子軸１０Ａの全周に設けられ、その外周に複数の第１溝部１９Ａが形成されている。   The magnet mounting portion 17 </ b> A is formed integrally with the shaft portion 16. The magnet mounting portion 17A is a part of the shaft portion 16 in the axial direction, is provided on the entire circumference of the rotor shaft 10A, and a plurality of first groove portions 19A are formed on the outer periphery thereof.

第１溝部１９Ａは、回転子軸１０Ａの軸方向に沿って磁石装着部１７Ａに延設されている。第１溝部１９Ａは、磁石装着部１７Ａの周方向に均等に配置されている。なお、第１溝部１９Ａは、磁石装着部１７Ａに固定される永久磁石１２一つに対して二つ設けられる。   The first groove portion 19A extends to the magnet mounting portion 17A along the axial direction of the rotor shaft 10A. 19 A of 1st groove parts are arrange | positioned equally at the circumferential direction of 17 A of magnet mounting parts. Two first groove portions 19A are provided for one permanent magnet 12 fixed to the magnet mounting portion 17A.

このような第１溝部１９Ａは、その底面が回転子軸１０Ａの軸方向に沿って傾斜して形成される。第１溝部１９Ａは、その傾斜が、第１嵌合部１８側に向ってその深さが漸次浅くなる形状に形成される。第１溝部１９Ａは、永久磁石１２の第２溝部２３と空間を形成する。   Such a first groove portion 19A is formed such that its bottom surface is inclined along the axial direction of the rotor shaft 10A. 19 A of 1st groove parts are formed in the shape where the depth becomes shallow gradually toward the 1st fitting part 18 side. The first groove 19 </ b> A forms a space with the second groove 23 of the permanent magnet 12.

楔部材１３Ａは、永久磁石１２を固定可能に形成されている。楔部材１３Ａは、第２の楔材２７と、固定部２８と、を備えている。第２の楔材２７は、第１溝部１９Ａと第２溝部２３で形成される空間と略同一形状に形成される。第２の楔材２７は、当該空間に挿入され、第１溝部１９Ａの傾斜と組み合わさることで、永久磁石１２を保持環１１の内周面に接する方向に押圧可能に形成されている。なお、第２の楔材２７は、その一の面である傾斜面が、第１溝部１９Ａの底面の傾斜と同じ角度で傾斜する。   The wedge member 13A is formed so that the permanent magnet 12 can be fixed. The wedge member 13 </ b> A includes a second wedge material 27 and a fixing portion 28. The second wedge member 27 is formed in substantially the same shape as the space formed by the first groove portion 19 </ b> A and the second groove portion 23. The second wedge member 27 is inserted into the space and is formed so as to be able to press the permanent magnet 12 in a direction in contact with the inner peripheral surface of the retaining ring 11 by being combined with the inclination of the first groove portion 19A. The second wedge member 27 has an inclined surface that is one surface thereof inclined at the same angle as the inclination of the bottom surface of the first groove portion 19A.

固定部２８は、組み合わされた第１溝部１９Ａと第２の楔材２７が互いに動かないように固定可能に形成されている。例えば、固定部２８は、第１溝部１９Ａ及び第２の楔材２７を、互いに動かないように溶接した溶接部である。   The fixing portion 28 is formed so as to be fixed so that the combined first groove portion 19A and the second wedge material 27 do not move relative to each other. For example, the fixed portion 28 is a welded portion where the first groove portion 19A and the second wedge member 27 are welded so as not to move with respect to each other.

このように構成された回転子１Ａは、その製造方法として、まず、第１嵌合部１８及び第２嵌合部２１を嵌合させて、回転子軸１０Ａ及び保持環１１を固定させる。次に、回転子軸１０Ａに設けられた磁石装着部１７の第１溝部１９Ａに一つ置きに、位置決めレール５０Ａを挿入する。   As a manufacturing method of the rotor 1A configured as described above, first, the first fitting portion 18 and the second fitting portion 21 are fitted to fix the rotor shaft 10A and the holding ring 11. Next, the positioning rail 50A is inserted into every other first groove portion 19A of the magnet mounting portion 17 provided on the rotor shaft 10A.

なお、位置決めレール５０Ａは、例えば、第１溝部１９Ａに当接する面が傾斜することで、その高さＨＲが、第１溝部１９Ａの傾斜に併せて漸次低くなる形状である。なお、一つ置きの第１溝部１９Ａ、即ち永久磁石１２の位置決めを行うための第１溝部１９Ａを、上述した底面に傾斜を有さない第１溝部１９とし、当該第１溝部１９に上述した位置決めレール５０を挿入させる構成であってもよい。   The positioning rail 50A has, for example, a shape in which the height HR gradually decreases in accordance with the inclination of the first groove portion 19A when the surface in contact with the first groove portion 19A is inclined. In addition, every other 1st groove part 19A, ie, the 1st groove part 19A for positioning the permanent magnet 12, is made into the 1st groove part 19 which does not have an inclination in the bottom face mentioned above, and the said 1st groove part 19 was mentioned above. The structure which inserts the positioning rail 50 may be sufficient.

位置決めレール５０Ａを、第１溝部１９Ａに一つ置きに配置後、永久磁石１２の一方の第２溝部２３を位置決めレール５０Ａにより案内させながら、磁石装着部１７Ａ及び保持環１１の隙間に永久磁石１２を挿入させ、複数の永久磁石１２を回転子軸１０Ａの周方向に沿って環状に配置させる。永久磁石１２配置後、位置決めレール５０Ａが挿入されていない他方の第１溝部１９Ａ、２３により形成された空間に、第２の楔材２７を打ち込む。   After the positioning rails 50A are alternately arranged in the first groove portions 19A, the permanent magnets 12 are inserted into the gaps between the magnet mounting portion 17A and the holding ring 11 while one second groove portion 23 of the permanent magnet 12 is guided by the positioning rails 50A. And a plurality of permanent magnets 12 are annularly arranged along the circumferential direction of the rotor shaft 10A. After the permanent magnet 12 is arranged, the second wedge member 27 is driven into the space formed by the other first groove portions 19A, 23 in which the positioning rail 50A is not inserted.

このとき、各永久磁石１２が保持環１１の内周面に密着するまで第２の楔材２７が圧入される。即ち、第１溝部１９Ａの底面及び第２の楔材２７は、互いに対向する面が傾斜して形成されるため、第２の楔材２７が圧入されると、第２の楔材２７は圧入方向だけでなく回転子軸１０Ａの径方向に移動することとなる。このため、第２の楔材２７の径方向の移動により、永久磁石１２が保持環１１の内周面に密着する方向に移動させることが可能となる。   At this time, the second wedge material 27 is press-fitted until each permanent magnet 12 comes into close contact with the inner peripheral surface of the retaining ring 11. That is, the bottom surface of the first groove portion 19A and the second wedge material 27 are formed so that the surfaces facing each other are inclined, so that when the second wedge material 27 is press-fitted, the second wedge material 27 is press-fitted. It moves not only in the direction but also in the radial direction of the rotor shaft 10A. For this reason, the movement of the second wedge member 27 in the radial direction enables the permanent magnet 12 to move in a direction in close contact with the inner peripheral surface of the retaining ring 11.

永久磁石１２を保持環１１に密着させた後、第２の楔材２７が軸方向にずれ動かないように、溶接により固定部２８で第１溝部１９Ａ及び第２の楔材２７を固定させることで、第２の楔材２７が回転子軸１０Ａ、保持環１１又はこれら双方に固定される。このようにして、回転子１Ａが組み立てられ、製造されることとなる。   After the permanent magnet 12 is brought into close contact with the retaining ring 11, the first groove portion 19A and the second wedge material 27 are fixed by the fixing portion 28 by welding so that the second wedge material 27 does not move in the axial direction. Thus, the second wedge member 27 is fixed to the rotor shaft 10A, the holding ring 11 or both. In this way, the rotor 1A is assembled and manufactured.

このように構成された回転子１Ａによれば、上述した第１の実施形態の回転子１と同様に、永久磁石１２を位置決めレール５０Ａで位置合わせ後、楔部材１３Ａで保持環１１の内面に密着するように磁石装着部１７Ａに永久磁石１２を装着させる。このように楔部材１３Ａ及び第１溝部１９Ａにより永久磁石１２を装着させることで、回転子１Ａは、製造が容易、且つ、永久磁石１２の固定を確実に行うことが可能となる。このため、回転子１Ａは、高い信頼性を有することとなる。   According to the rotor 1A configured as described above, the permanent magnet 12 is aligned with the positioning rail 50A and then the inner surface of the holding ring 11 with the wedge member 13A, as in the rotor 1 of the first embodiment described above. The permanent magnet 12 is mounted on the magnet mounting portion 17A so as to be in close contact. Thus, by attaching the permanent magnet 12 by the wedge member 13A and the first groove portion 19A, the rotor 1A can be easily manufactured and the permanent magnet 12 can be reliably fixed. For this reason, the rotor 1A has high reliability.

また、回転子１Ａは、永久磁石１２の固定に第２の楔材２７を挿入する構成であり、このため、第２の楔材２７の保管管理、取り扱い及び組み立て作業が、上述した第１、第２の楔材２６，２７により永久磁石１２を固定させる回転子１に比べ容易となる。即ち、回転子１Ａは、製造時間の短縮及び製造コストの低減が可能となる。   Further, the rotor 1A is configured to insert the second wedge material 27 to fix the permanent magnet 12, and for this reason, the storage management, handling, and assembly work of the second wedge material 27 are the first, The second wedge members 26 and 27 are easier than the rotor 1 that fixes the permanent magnet 12. That is, the rotor 1A can reduce the manufacturing time and the manufacturing cost.

上述したように第２の実施形態に係る回転子１Ａによれば、その製造が容易であって、且つ、永久磁石１２の固定を確実に行い、信頼性を向上させるとともに、製造時間の短縮及び製造コストの低減が可能となる。   As described above, according to the rotor 1A according to the second embodiment, the manufacture thereof is easy, and the permanent magnet 12 is securely fixed, the reliability is improved, and the manufacturing time is shortened. Manufacturing cost can be reduced.

なお、本発明は前述した実施の形態に限定されるものではない。上述した例では、固定部２８は、溶接により第１、第２の楔材２６，２７、又は、第１溝部１９Ａ及び第２の楔材２７を固定する溶接部として説明をしたがこれに限定されない。例えば、固定部２８は、第１、第２の楔材２６，２７又は第１溝部１９Ａ及び第２の楔材２７を固定可能であればよく、固定螺子と固定片とで第１、第２の楔材２６，２７又は第１溝部１９Ａ及び第２の楔材２７を一体固定する構成であってもよい。また、固定部２８は、リング状の嵌合環等を回転子軸１０，１０Ａに嵌合させて、第１、第２楔材２６，２７又は第１溝部１９Ａ及び第２の楔材２７の移動を規制する構成であってもよい。   The present invention is not limited to the embodiments described above. In the above-described example, the fixing portion 28 has been described as the first and second wedge members 26 and 27 or the welded portion that fixes the first groove portion 19A and the second wedge member 27 by welding, but is not limited thereto. Not. For example, the fixing portion 28 only needs to be able to fix the first and second wedge members 26 and 27 or the first groove portion 19A and the second wedge member 27. The wedge members 26 and 27 or the first groove portion 19A and the second wedge member 27 may be integrally fixed. Further, the fixing portion 28 is configured to fit the first and second wedge members 26 and 27 or the first groove portion 19A and the second wedge member 27 by fitting a ring-shaped fitting ring or the like to the rotor shafts 10 and 10A. The structure which controls a movement may be sufficient.

また、上述した例では、永久磁石１２の内面に２つの第２溝部２３，２３を形成し、当該第２溝部２３，２３と磁石装着部１７の第１溝部１９，１９（１９Ａ，１９Ａ）で形成される空間のうち、一方の空間に位置決めレール５０（５０Ａ）を挿入して永久磁石１２の位置決めを行い、他方の空間に楔部材１３（１３Ａ）を設ける構成を説明したがこれに限定されない。   In the example described above, two second groove portions 23, 23 are formed on the inner surface of the permanent magnet 12, and the second groove portions 23, 23 and the first groove portions 19, 19 (19 </ b> A, 19 </ b> A) of the magnet mounting portion 17 are used. Although the structure which inserts the positioning rail 50 (50A) in one space among the formed spaces, positions the permanent magnet 12, and provides the wedge member 13 (13A) in the other space was demonstrated, it is not limited to this. .

以下、図１１を用いて、本発明の変形例に係る回転子１Ｂについて説明する。なお、上述した回転子１、１Ａと同様の構成には同一符号を付し、その詳細な説明は省略する。   Hereinafter, a rotor 1B according to a modification of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to the rotor 1 and 1A mentioned above, and the detailed description is abbreviate | omitted.

回転子１Ｂは、回転子軸１０と、保持環１１と、永久磁石１２Ｂと、楔部材１３と、を備えている。例えば、図１１に示すように、永久磁石１２Ｂは、その内面の略中央に一つ設けられた第２溝部２３と、その内面の両端側にそれぞれ設けられた切欠部２３Ｂと、を備えている。切欠部２３Ｂは、隣り合って配置される永久磁石１２Ｂの切欠部２３Ｂと組み合わさることで、第２溝部２３を形成する。   The rotor 1B includes a rotor shaft 10, a holding ring 11, a permanent magnet 12B, and a wedge member 13. For example, as shown in FIG. 11, the permanent magnet 12 </ b> B includes a second groove portion 23 that is provided approximately at the center of the inner surface, and cutout portions 23 </ b> B that are provided on both ends of the inner surface. . The notch 23B is combined with the notch 23B of the permanent magnet 12B arranged adjacent to each other to form the second groove 23.

このような回転子１Ｂは、第１嵌合部１８及び第２嵌合部２１を嵌合させて、回転子軸１０及び保持環１１を固定後、回転子軸１０に設けられた磁石装着部１７の第１溝部１９に一つ置きに、位置決めレール５０を挿入する。   In such a rotor 1B, the first fitting portion 18 and the second fitting portion 21 are fitted to fix the rotor shaft 10 and the retaining ring 11, and then the magnet mounting portion provided on the rotor shaft 10. The positioning rails 50 are inserted into every other first groove portion 17 of 17.

その後、永久磁石１２Ｂの第２溝部２３を位置決めレール５０に嵌合させて永久磁石１２Ｂの位置決めを行いながら、複数の永久磁石１２Ｂを回転子軸１０の周方向に沿って環状に配置させる。永久磁石１２Ｂの配置後、隣り合う永久磁石１２Ｂの切欠部２３Ｂにより形成された第２溝部２３と第１溝部１９とにより形成された空間に、楔部材１３を打ち込む。   Thereafter, the second groove 23 of the permanent magnet 12B is fitted to the positioning rail 50 to position the permanent magnet 12B, and the plurality of permanent magnets 12B are annularly arranged along the circumferential direction of the rotor shaft 10. After the permanent magnet 12B is arranged, the wedge member 13 is driven into the space formed by the second groove portion 23 and the first groove portion 19 formed by the notch portion 23B of the adjacent permanent magnet 12B.

このとき、第２の楔材２７の径方向の移動により、永久磁石１２Ｂが保持環１１の内周面に密着させる。永久磁石１２Ｂを保持環１１に密着させた後、第１の楔材２６及び第２の楔材２７を固定部２８で固定させることで、回転子１Ｂが組み立てられ、製造されることとなる。このような回転子１Ｂは、上述した回転子１と同様の効果を得ることが可能となる。   At this time, the permanent magnet 12 </ b> B is brought into close contact with the inner peripheral surface of the retaining ring 11 by the radial movement of the second wedge member 27. After the permanent magnet 12B is brought into close contact with the holding ring 11, the first wedge member 26 and the second wedge member 27 are fixed by the fixing portion 28, whereby the rotor 1B is assembled and manufactured. Such a rotor 1B can obtain the same effect as the rotor 1 described above.

なお、本変形例においては、回転子１Ｂは、回転子軸１０及び楔部材１３を用いる構成を説明したが、これに限定されない。例えば、回転子軸１０及び楔部材１３ではなく、上述した回転子軸１０Ａ及び楔部材１３Ａを用い、第１の楔材２６を用いない構成としてもよい。このような構成とすることで、上述した回転子１Ａと同様の効果を得ることが可能となる。この他本発明の要旨を逸脱しない範囲で種々変形実施可能である。   In addition, in this modification, although the rotor 1B demonstrated the structure which uses the rotor shaft 10 and the wedge member 13, it is not limited to this. For example, instead of the rotor shaft 10 and the wedge member 13, the rotor shaft 10A and the wedge member 13A described above may be used and the first wedge material 26 may not be used. By setting it as such a structure, it becomes possible to acquire the effect similar to the rotor 1A mentioned above. In addition, various modifications can be made without departing from the scope of the present invention.

１，１Ａ，１Ｂ…回転子、１０，１０Ａ…回転子軸、１１…保持環、１２，１２Ｂ…永久磁石、１３，１３Ａ…楔部材、１６…軸部、１７，１７Ａ…磁石装着部、１８…第１嵌合部、１９，１９Ａ…第１溝部、２１…第２嵌合部、２３…第２溝部、２３Ｂ…切欠部、２６…第１の楔材、２７…第２の楔材、２８…固定部、３１，３２…空間部、５０，５０Ａ…位置決めレール、１００…回転子、１１０…回転子軸、１１１…保持環、１１２…永久磁石、１１２ａ…塗布面、１１６…軸部、１１７…磁石装着部、１１８…嵌合部、１２１…嵌合部。   DESCRIPTION OF SYMBOLS 1,1A, 1B ... Rotor, 10, 10A ... Rotor shaft, 11 ... Holding ring, 12, 12B ... Permanent magnet, 13, 13A ... Wedge member, 16 ... Shaft part, 17, 17A ... Magnet mounting part, 18 ... 1st fitting part, 19 and 19A ... 1st groove part, 21 ... 2nd fitting part, 23 ... 2nd groove part, 23B ... Notch part, 26 ... 1st wedge material, 27 ... 2nd wedge material, 28 ... fixed part, 31, 32 ... space part, 50, 50A ... positioning rail, 100 ... rotor, 110 ... rotor shaft, 111 ... retaining ring, 112 ... permanent magnet, 112a ... application surface, 116 ... shaft part, 117: Magnet mounting portion, 118: Fitting portion, 121: Fitting portion.

Claims (6)

その軸方向に沿って延びる第１溝部がその外周に複数形成された回転子軸と、
その内面に前記第１溝部のうち隣り合う２つとそれぞれ対向する２つの第２溝部が形成され、前記回転子軸の外周に、前記回転子軸の周方向に沿って環状に複数配置される永久磁石と、
前記回転子軸の外周に嵌合されて前記永久磁石を覆う保持環と、
前記第１溝部と前記第２溝部が対向することで形成される空間に一つ置きにそれぞれ挿入され、前記永久磁石を前記保持環の内周面に接触させて固定する楔部材と、を備え、
前記回転子軸と前記保持環を嵌合後に、前記第１溝部に一つ置きに前記空間と略同一形状の案内レールを挿入し、前記案内レールに前記永久磁石の前記第２溝部の一方を案内させて前記回転子軸と前記保持環の間に前記永久磁石を挿入後、前記楔部材を挿入することを特徴とする永久磁石式回転電機の回転子。 A rotor shaft in which a plurality of first groove portions extending along the axial direction are formed on the outer periphery;
Two second groove portions that are opposed to two adjacent ones of the first groove portions are formed on the inner surface, and a plurality of permanent grooves are annularly arranged on the outer periphery of the rotor shaft along the circumferential direction of the rotor shaft. A magnet,
A retaining ring that is fitted to the outer periphery of the rotor shaft and covers the permanent magnet;
A wedge member that is inserted into every other space formed by the first groove portion and the second groove portion facing each other and that fixes the permanent magnet in contact with the inner peripheral surface of the retaining ring. ,
After fitting the rotor shaft and the retaining ring, a guide rail having substantially the same shape as the space is inserted into the first groove portion, and one of the second groove portions of the permanent magnet is inserted into the guide rail. A rotor of a permanent magnet type rotating electrical machine, wherein the wedge member is inserted after the permanent magnet is inserted between the rotor shaft and the holding ring. 前記楔部材は、前記空間へ挿入される一対の楔材と、前記一対の楔材を前記空間へ挿入後に前記一対の楔材を固定する固定部と、を備えること特徴とする請求項１に記載の永久磁石式回転電機の回転子。   The wedge member includes a pair of wedge members inserted into the space, and a fixing portion that fixes the pair of wedge members after the pair of wedge members are inserted into the space. The rotor of the described permanent magnet type rotating electrical machine. 前記楔部材が挿入される前記第１溝部は、その底面が前記回転子軸に対して傾斜して形成され、
前記楔部材は、前記空間へ挿入される１本の楔材と、前記楔材を前記底面が傾斜する前記第１溝部に挿入後に前記楔材及び前記楔材が挿入された前記溝部の前記底面とを固定する固定部を具備することを特徴とする請求項１に記載の永久磁石式回転電機の回転子。 The first groove portion into which the wedge member is inserted is formed such that a bottom surface thereof is inclined with respect to the rotor shaft,
The wedge member includes a wedge material inserted into the space, and the bottom surface of the groove portion into which the wedge material and the wedge material are inserted after the wedge material is inserted into the first groove portion where the bottom surface is inclined. The rotor of the permanent magnet type rotating electrical machine according to claim 1, further comprising: a fixing portion that fixes その軸方向に沿って延びる第１溝部がその外周に複数形成された回転子軸と、
前記回転子軸の外周に、前記回転子軸の周方向に沿って環状に複数配置される永久磁石と、
前記永久磁石の内面の中央側、及び、隣り合って配置された前記永久磁石の隣接する端部間の内面にそれぞれ形成された、前記第１溝部と対向する第２溝部と、
前記回転子軸の外周に嵌合されて前記永久磁石を覆う保持環と、
前記第１溝部と前記第２溝部が対向することで形成される空間に一つ置きにそれぞれ挿入され、前記永久磁石を前記保持環の内周面に接触させて固定する楔部材と、を備え、
前記回転子軸と前記保持環を嵌合後に、前記第１溝部に一つ置きに前記空間と略同一形状の案内レールを挿入し、前記案内レールに前記第２溝部を一つ置きに案内させて前記回転子軸と前記保持環の間に前記永久磁石を挿入後、前記楔部材を挿入することを特徴とする永久磁石式回転電機の回転子。 A rotor shaft in which a plurality of first groove portions extending along the axial direction are formed on the outer periphery;
The outer periphery of the rotor shaft, a plurality placed Ru permanent magnet annularly in the circumferential direction of the rotor shaft,
A second groove portion facing the first groove portion, formed on the center side of the inner surface of the permanent magnet and on the inner surface between adjacent end portions of the permanent magnets arranged adjacent to each other;
A retaining ring that is fitted to the outer periphery of the rotor shaft and covers the permanent magnet;
A wedge member that is inserted into every other space formed by the first groove portion and the second groove portion facing each other and that fixes the permanent magnet in contact with the inner peripheral surface of the retaining ring. ,
After fitting the retaining ring and the rotor shaft, the said insert space and guide rails of substantially the same shape in every other in the first groove, guide every other previous SL second groove in the guide rail after inserting the permanent magnet between the retaining ring and the rotor shaft by the rotor of a permanent magnet type rotating electrical machine, characterized in that to insert the wedge member. 前記楔部材は、前記空間へ挿入される一対の楔材と、前記一対の楔材を前記空間へ挿入後に前記一対の楔材を固定する固定部と、を備えること特徴とする請求項４に記載の永久磁石式回転電機の回転子。   The said wedge member is provided with a pair of wedge material inserted in the said space, and the fixing | fixed part which fixes the said pair of wedge material after inserting the said pair of wedge material in the said space. The rotor of the described permanent magnet type rotating electrical machine. 前記楔部材が挿入される前記第１溝部は、その底面が前記回転子軸に対して傾斜して形成され、
前記楔部材は、前記空間へ挿入される１本の楔材と、前記楔材を前記底面が傾斜する前記第１溝部に挿入後に前記楔材及び前記楔材が挿入された前記溝部の前記底面とを固定する固定部を具備することを特徴とする請求項４に記載の永久磁石式回転電機の回転子。 The first groove portion into which the wedge member is inserted is formed such that a bottom surface thereof is inclined with respect to the rotor shaft,
The wedge member includes a wedge material inserted into the space, and the bottom surface of the groove portion into which the wedge material and the wedge material are inserted after the wedge material is inserted into the first groove portion where the bottom surface is inclined. The rotor of the permanent magnet type rotating electrical machine according to claim 4, further comprising a fixing portion that fixes
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