JP7256453B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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JP7256453B2
JP7256453B2 JP2019105387A JP2019105387A JP7256453B2 JP 7256453 B2 JP7256453 B2 JP 7256453B2 JP 2019105387 A JP2019105387 A JP 2019105387A JP 2019105387 A JP2019105387 A JP 2019105387A JP 7256453 B2 JP7256453 B2 JP 7256453B2
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bearing
rotating shaft
iron core
outer diameter
thrust force
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JP2020198760A (en
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広樹 辻合
謙太 後藤
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Denso Corp
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Denso Corp
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Priority to PCT/JP2020/020453 priority patent/WO2020246281A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Sliding-Contact Bearings (AREA)

Description

本発明は、回転電機に関するものである。 The present invention relates to rotating electric machines.

例えば、特許文献１には、回転軸が２つ以上の軸受によって回転可能に支持された回転電機が開示されている。 For example, Patent Literature 1 discloses a rotating electric machine in which a rotating shaft is rotatably supported by two or more bearings.

特許第３１５５３６３号公報Japanese Patent No. 3155363

本発明者らは、上記のような回転電機において如何に軽量化を実現させるかを検討していた。
本発明は、上記課題を解決するためになされたものであって、その目的は、軽量化を可能にした回転電機を提供することにある。 The inventors of the present invention have studied how to reduce the weight of the rotating electric machine as described above.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a rotating electrical machine that can be made lighter.

上記課題を解決する回転電機は、回転軸（１３）を有する回転子（１２）と、内周側で前記回転軸を回転可能に支持する円環状の第１軸受（１６）と、内周側で前記回転軸を回転可能に支持する円環状の第２軸受（１７）と、を備えた回転電機であって、前記第２軸受の外径（Ｄ２）が前記第１軸受の外径（Ｄ１）及び前記回転軸の最大外径（Ｄ３）よりも小さく設定されている。 A rotary electric machine that solves the above problems comprises a rotor (12) having a rotating shaft (13), an annular first bearing (16) that rotatably supports the rotating shaft on the inner peripheral side, and an annular second bearing (17) that rotatably supports the rotating shaft, wherein the outer diameter (D2) of the second bearing is equal to the outer diameter (D1 ) and the maximum outer diameter (D3) of the rotating shaft.

上記態様によれば、第２軸受を小型化でき、その結果、回転電機の軽量化が可能となる。 According to the above aspect, the size of the second bearing can be reduced, and as a result, the weight of the rotating electric machine can be reduced.

実施形態における回転電機の断面図。Sectional drawing of the rotary electric machine in embodiment.

以下、回転電機の一実施形態について説明する。
図１に示す本実施形態の回転電機は、ハウジング１０と、ハウジング１０内に固定された円筒状の固定子１１と、固定子１１の径方向内側に回転可能に設けられた回転子１２とを備えている。回転子１２は、回転軸１３と、回転軸１３に一体回転可能に設けられた鉄心１４と、鉄心１４の外周部に設けられた磁石１５とを備えている。ハウジング１０には、回転軸１３を回転可能に支持する円環状の第１軸受１６及び第２軸受１７が固定されている。 An embodiment of a rotating electrical machine will be described below.
The rotating electrical machine of this embodiment shown in FIG. I have. The rotor 12 includes a rotating shaft 13 , an iron core 14 provided to rotate integrally with the rotating shaft 13 , and magnets 15 provided on the outer peripheral portion of the iron core 14 . A ring-shaped first bearing 16 and a second bearing 17 that rotatably support the rotating shaft 13 are fixed to the housing 10 .

回転子１２の鉄心１４は磁性体からなる。本実施形態では、鉄心１４は、金属板からプレス加工により成形された複数の電磁鋼板（図示略）を軸方向に積層した構成を有している。鉄心１４は、回転軸１３に固定された円盤状の基部１４ａと、基部１４ａの外周縁に形成されたヨーク部１４ｂとを有している。ヨーク部１４ｂは、基部１４ａの外周縁から軸方向両側に延びている。また、ヨーク部１４ｂは軸方向視で円環状をなしている。ヨーク部１４ｂの外周面には磁石１５が固定されている。第１軸受１６及び第２軸受１７は、鉄心１４の軸方向両側にそれぞれ配置されている。 The iron core 14 of the rotor 12 is made of magnetic material. In this embodiment, the iron core 14 has a structure in which a plurality of electromagnetic steel sheets (not shown) formed by pressing a metal plate are laminated in the axial direction. The iron core 14 has a disk-shaped base portion 14a fixed to the rotating shaft 13, and a yoke portion 14b formed on the outer peripheral edge of the base portion 14a. The yoke portion 14b extends axially on both sides from the outer peripheral edge of the base portion 14a. The yoke portion 14b has an annular shape when viewed in the axial direction. A magnet 15 is fixed to the outer peripheral surface of the yoke portion 14b. The first bearing 16 and the second bearing 17 are arranged on both sides of the iron core 14 in the axial direction.

また、鉄心１４の軸方向両端部には、軸方向に窪む凹部１４ｃがそれぞれ凹設されている。各凹部１４ｃは、軸方向視において回転軸１３の軸線Ｌを中心とする円環状をなしている。各凹部１４ｃは、基部１４ａの軸方向端面と基部１４ａから軸方向に延びるヨーク部１４ｂの内周面とで形成されている。また、各凹部１４ｃは、磁石１５の内周側に位置している。 Further, axially recessed recesses 14c are provided at both ends of the iron core 14 in the axial direction. Each recess 14c has an annular shape centered on the axis L of the rotating shaft 13 when viewed in the axial direction. Each recess 14c is formed by the axial end surface of the base portion 14a and the inner peripheral surface of the yoke portion 14b extending axially from the base portion 14a. Further, each concave portion 14 c is located on the inner peripheral side of the magnet 15 .

回転軸１３は、出力部Ｘが連結される連結部２１と、鉄心１４が固定される鉄心固定部２２と、被支持部２３とを有している。鉄心固定部２２に対する軸方向一方側に連結部２１が配置され、鉄心固定部２２に対する軸方向他方側に被支持部２３が配置されている。 The rotating shaft 13 has a connecting portion 21 to which the output portion X is connected, a core fixing portion 22 to which the core 14 is fixed, and a supported portion 23 . The connecting portion 21 is arranged on one side in the axial direction with respect to the core fixing portion 22 , and the supported portion 23 is arranged on the other side in the axial direction with respect to the core fixing portion 22 .

連結部２１は、回転軸１３の軸線Ｌを中心とする円筒状をなしている。連結部２１の外周面は、第１軸受１６に支持される部位として設定されている。鉄心固定部２２は、連結部２１から軸方向に連続する円筒状をなしている。連結部２１と鉄心固定部２２との間の位置には、回転軸１３の外周面から径方向外側に突出する円環状の第１位置決め部２４が形成されている。 The connecting portion 21 has a cylindrical shape centered on the axis L of the rotating shaft 13 . An outer peripheral surface of the connecting portion 21 is set as a portion supported by the first bearing 16 . The core fixing portion 22 has a cylindrical shape that continues from the connecting portion 21 in the axial direction. An annular first positioning portion 24 projecting radially outward from the outer peripheral surface of the rotating shaft 13 is formed between the connecting portion 21 and the core fixing portion 22 .

第１位置決め部２４の軸方向一端面は、連結部２１に固定された第１軸受１６の内周縁部に軸方向に当接している。また、第１位置決め部２４の軸方向他端面は、鉄心固定部２２に固定された鉄心１４の内周縁部に軸方向に当接している。第１位置決め部２４は、第１軸受１６及び鉄心１４の軸方向の位置決めとして機能する。また、第１位置決め部２４は、第１軸受１６に対して、後述するスラスト力Ｆの方向に当接している。 One axial end surface of the first positioning portion 24 axially abuts the inner peripheral edge portion of the first bearing 16 fixed to the connecting portion 21 . The other axial end surface of the first positioning portion 24 is axially in contact with the inner peripheral edge portion of the core 14 fixed to the core fixing portion 22 . The first positioning portion 24 functions to position the first bearing 16 and the iron core 14 in the axial direction. Further, the first positioning portion 24 contacts the first bearing 16 in the direction of a thrust force F, which will be described later.

被支持部２３は、鉄心固定部２２の反出力側（すなわち、連結部２１とは反対側）の位置に形成され、軸線Ｌ方向に延びる円筒状をなしている。被支持部２３の軸方向視の外形は、回転軸１３の軸線Ｌを中心とする円形をなし、その外径は連結部２１の外径よりも小さく設定されている。被支持部２３の外周面は、第２軸受１７に支持される部位として設定されている。 The supported portion 23 is formed at a position opposite to the output side of the core fixing portion 22 (that is, the side opposite to the connecting portion 21) and has a cylindrical shape extending in the axis L direction. The outer shape of the supported portion 23 when viewed in the axial direction is a circle centered on the axis L of the rotating shaft 13 , and its outer diameter is set smaller than the outer diameter of the connecting portion 21 . The outer peripheral surface of the supported portion 23 is set as a portion to be supported by the second bearing 17 .

また、回転軸１３において、被支持部２３の軸方向出力側の位置には、第２軸受１７の軸方向の位置決めをする第２位置決め部２５が形成されている。第２位置決め部２５は、第２軸受１７に対して、後述するスラスト力Ｆの反対方向に当接している。なお、回転軸１３において、被支持部２３よりも反出力側（すなわち、連結部２１とは反対側）の位置には、レゾルバ２６が組み付けられている。 A second positioning portion 25 for positioning the second bearing 17 in the axial direction is formed on the rotary shaft 13 at a position on the output side of the supported portion 23 in the axial direction. The second positioning portion 25 contacts the second bearing 17 in a direction opposite to a thrust force F described later. A resolver 26 is attached to the rotating shaft 13 at a position on the opposite side of the supported portion 23 (that is, on the side opposite to the connecting portion 21 ).

第１軸受１６及び第２軸受１７は、転がり軸受または滑り軸受からなる。第１軸受１６及び第２軸受１７は、それらの内周側で回転軸１３を回転可能に支持している。第２軸受１７の外径Ｄ２は、第１軸受１６の外径Ｄ１よりも小さく設定されている。また、第２軸受１７の外径Ｄ２は、回転軸１３の最大外径である第１位置決め部２４の外径Ｄ３よりも小さく設定されている。また、第２軸受１７は、その軸方向の全体が鉄心１４の一方の凹部１４ｃ内に位置している。換言すると、第２軸受１７は、その軸方向の全体が鉄心１４のヨーク部１４ｂの径方向内側に位置している。 The first bearing 16 and the second bearing 17 are rolling bearings or sliding bearings. The first bearing 16 and the second bearing 17 rotatably support the rotary shaft 13 on their inner peripheral sides. The outer diameter D2 of the second bearing 17 is set smaller than the outer diameter D1 of the first bearing 16 . The outer diameter D2 of the second bearing 17 is set smaller than the outer diameter D3 of the first positioning portion 24, which is the maximum outer diameter of the rotating shaft 13. As shown in FIG. The entire axial direction of the second bearing 17 is located in one recess 14 c of the iron core 14 . In other words, the entire axial direction of the second bearing 17 is located radially inside the yoke portion 14 b of the iron core 14 .

本実施形態の作用について説明する。
固定子１１への通電により回転軸１３及び出力部Ｘが一方方向に回転すると、出力部Ｘの回転によって回転軸１３に軸方向一方側へのスラスト力Ｆが発生する。なお、このような、主に一方方向に回転し、その回転に伴い軸方向一方側へのスラスト力Ｆが生じる出力部Ｘの例としては、換気扇や車両のラジエータなどの主に一方方向に送風するファンが挙げられる。そして、回転軸１３に生じたスラスト力Ｆは、回転軸１３の第１位置決め部２４を介して第１軸受１６で受けるように構成されている。 The operation of this embodiment will be described.
When the rotation shaft 13 and the output portion X rotate in one direction due to the energization of the stator 11 , the rotation of the output portion X causes the rotation shaft 13 to generate a thrust force F toward one side in the axial direction. Examples of the output part X that rotates mainly in one direction and generates a thrust force F toward one side in the axial direction as it rotates include a ventilating fan, a radiator of a vehicle, and the like, which mainly blows air in one direction. There are fans who do. The thrust force F generated in the rotating shaft 13 is received by the first bearing 16 via the first positioning portion 24 of the rotating shaft 13 .

本実施形態の効果について説明する。
（１）第２軸受１７の外径Ｄ２は、第１軸受１６の外径Ｄ１、及び回転軸１３の最大外径（すなわち、第１位置決め部２４の外径Ｄ３）よりも小さく設定されている。これにより、第２軸受１７を小型化でき、その結果、回転電機の軽量化が可能となる。 Effects of the present embodiment will be described.
(1) The outer diameter D2 of the second bearing 17 is set smaller than the outer diameter D1 of the first bearing 16 and the maximum outer diameter of the rotating shaft 13 (that is, the outer diameter D3 of the first positioning portion 24). . As a result, the size of the second bearing 17 can be reduced, and as a result, the weight of the rotating electric machine can be reduced.

（２）回転軸１３は、該回転軸１３と一体回転する出力部Ｘが内側に挿入されて連結される筒状の連結部２１を有している。そして、第２軸受１７は、回転軸１３において連結部２１よりも小径をなす被支持部２３を支持する。筒状の連結部２１の内側に出力部Ｘが連結される回転軸１３の構成では、回転軸１３の外径が大きくなりがちである。その点、本実施形態では、連結部２１よりも小径の被支持部２３を回転軸１３に形成し、その被支持部２３を第２軸受１７で支持させる構成とすることで、回転軸１３が筒状の連結部２１を有する構成であっても、第２軸受１７の小径化が可能となる。 (2) The rotating shaft 13 has a cylindrical connecting portion 21 into which the output portion X rotating integrally with the rotating shaft 13 is inserted and connected. The second bearing 17 supports a supported portion 23 having a diameter smaller than that of the connecting portion 21 on the rotating shaft 13 . In the configuration of the rotating shaft 13 in which the output portion X is connected to the inner side of the cylindrical connecting portion 21, the outer diameter of the rotating shaft 13 tends to be large. In this regard, in the present embodiment, the supported portion 23 having a diameter smaller than that of the connecting portion 21 is formed on the rotating shaft 13, and the supported portion 23 is supported by the second bearing 17, so that the rotating shaft 13 is The diameter of the second bearing 17 can be reduced even with the configuration having the cylindrical connecting portion 21 .

（３）出力部Ｘの主となる方向の回転によって回転軸１３に軸方向一方側へのスラスト力Ｆが発生するように構成される。第２軸受１７は、第１軸受１６に対しスラスト力Ｆの方向の後方側に配置されている。そして、回転軸１３には、第１軸受１６に対してスラスト力Ｆの方向に当接する第１当接部としての第１位置決め部２４と、第２軸受１７に対してスラスト力Ｆの反対方向に当接する第２当接部としての第２位置決め部２５とが設けられている。これにより、回転軸１３に生じるスラスト力Ｆの負荷を主に第１軸受１６で受け、小径の第２軸受１７にはスラスト力Ｆの負荷が掛かりにくい構成とすることが可能となる。このため、第２軸受１７が高い強度を必要とせず、その結果、第２軸受１７の小径化が可能となる。 (3) The rotation of the output portion X in the main direction generates a thrust force F toward one side in the axial direction of the rotary shaft 13 . The second bearing 17 is arranged on the rear side in the direction of the thrust force F with respect to the first bearing 16 . The rotation shaft 13 has a first positioning portion 24 as a first contact portion that contacts the first bearing 16 in the direction of the thrust force F, and a first positioning portion 24 that contacts the second bearing 17 in the direction opposite to the thrust force F. A second positioning portion 25 is provided as a second abutment portion that abuts on the . As a result, the load of the thrust force F generated in the rotating shaft 13 can be mainly received by the first bearing 16, and the load of the thrust force F is less likely to be applied to the second bearing 17 having a small diameter. Therefore, the second bearing 17 does not require high strength, and as a result, the diameter of the second bearing 17 can be reduced.

（４）回転子１２の鉄心１４は、該鉄心１４の軸方向端部に凹設された軸方向視で環状の凹部１４ｃを、磁石１５の内周側の位置に有している。そして、第２軸受１７は、鉄心１４の凹部１４ｃ内に位置している。これにより、回転電機の軸方向への小型化に寄与できる。また、第２軸受１７が小径化されているため、第２軸受１７を凹部１４ｃ内に配置しやすくなる。 (4) The iron core 14 of the rotor 12 has an annular recess 14 c recessed in the axial end of the iron core 14 and positioned on the inner peripheral side of the magnet 15 when viewed in the axial direction. The second bearing 17 is located inside the recess 14c of the iron core 14 . This can contribute to miniaturization in the axial direction of the rotary electric machine. Further, since the diameter of the second bearing 17 is reduced, it becomes easier to arrange the second bearing 17 in the recess 14c.

本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・上記実施形態では、回転軸１３が中空状をなすが、これに限らず、回転軸１３を中実状に形成してもよい。 This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- Although the rotating shaft 13 is hollow in the above embodiment, the rotating shaft 13 may be formed in a solid shape.

・上記実施形態では、回転軸１３の出力側（すなわち連結部２１側）に大径の第１軸受１６を配置し、反出力側に小径の第２軸受１７を配置したが、これに限らず、出力側に小径の第２軸受１７を配置し、反出力側に大径の第１軸受１６を配置してもよい。 In the above-described embodiment, the large-diameter first bearing 16 is arranged on the output side of the rotating shaft 13 (that is, the connecting portion 21 side), and the small-diameter second bearing 17 is arranged on the non-output side. Alternatively, the small-diameter second bearing 17 may be arranged on the output side, and the large-diameter first bearing 16 may be arranged on the non-output side.

・上記実施形態では、第２軸受１７の軸方向の全体が鉄心１４の凹部１４ｃ内に位置しているが、これに限らず、第２軸受１７の軸方向の一部が凹部１４ｃ内に位置する構成としてもよい。 In the above embodiment, the entire axial direction of the second bearing 17 is positioned within the recess 14c of the iron core 14, but not limited to this, a portion of the second bearing 17 in the axial direction is positioned within the recess 14c. It is good also as a structure which carries out.

・上記実施形態では、磁石１５がヨーク部１４ｂの外周面に固定されたが、これ以外に例えば、磁石１５がヨーク部１４ｂ内に埋設された構成としてもよい。 - In the above-described embodiment, the magnet 15 is fixed to the outer peripheral surface of the yoke portion 14b. Alternatively, for example, the magnet 15 may be embedded in the yoke portion 14b.

１２…回転子、１３…回転軸、１４…鉄心、１４ｃ…凹部、１５…磁石、１６…第１軸受、１７…第２軸受、２１…連結部、２３…被支持部、２４…第１位置決め部（第１当接部）、２５…第２位置決め部（第２当接部）、Ｄ１…第２軸受の外径、Ｄ２…第２軸受の外径、Ｄ３…第１位置決め部の外径（回転軸の最大外径）、Ｘ…出力部、Ｆ…スラスト力。 DESCRIPTION OF SYMBOLS 12... Rotor, 13... Rotating shaft, 14... Iron core, 14c... Recessed part, 15... Magnet, 16... First bearing, 17... Second bearing, 21... Connecting part, 23... Supported part, 24... First positioning Part (first contact part), 25... Second positioning part (second contact part), D1... Outer diameter of second bearing, D2... Outer diameter of second bearing, D3... Outer diameter of first positioning part (maximum outer diameter of rotating shaft), X... output part, F... thrust force.

Claims (4)

回転軸（１３）を有する回転子（１２）と、
内周側で前記回転軸を回転可能に支持する円環状の第１軸受（１６）と、
内周側で前記回転軸を回転可能に支持する円環状の第２軸受（１７）と、
を備え、
前記回転子は、前記回転軸に一体回転可能に固定され、軸方向視で前記回転軸を中心とする円形をなす鉄心（１４）と、前記鉄心の外周部に設けられた磁石（１５）と、を備え、
前記回転軸には、該回転軸と一体回転する出力部（Ｘ）が連結され、
前記出力部の主となる方向の回転によって前記回転軸に軸方向一方側へのスラスト力が発生するように構成された回転電機であって、
前記第１軸受は、前記第２軸受に対して前記スラスト力の方向に配置され、
前記第２軸受の外径（Ｄ２）が前記第１軸受の外径（Ｄ１）及び前記回転軸の最大外径（Ｄ３）よりも小さく設定されており、
前記回転軸には、前記第１軸受に対して前記スラスト力の方向に当接するとともに前記鉄心に対して軸方向に当接している当接部（２４）が設けられ、
前記鉄心は、該鉄心の前記第１軸受側の軸方向端部に凹設された軸方向視で環状の凹部（１４ｃ）を前記磁石の内周側の位置に有し、
前記当接部は、前記第１軸受側の前記凹部内に位置しているとともに、該凹部における軸方向端面に当接している回転電機。 a rotor (12) having an axis of rotation (13);
an annular first bearing (16) that rotatably supports the rotating shaft on the inner peripheral side;
an annular second bearing (17) that rotatably supports the rotating shaft on the inner peripheral side;
with
The rotor includes an iron core (14) fixed to the rotating shaft so as to be integrally rotatable, and having a circular shape centered on the rotating shaft when viewed in the axial direction, and magnets (15) provided on the outer periphery of the iron core. , and
An output portion (X) that rotates integrally with the rotating shaft is connected to the rotating shaft,
A rotating electrical machine configured to generate a thrust force in one axial direction on the rotating shaft by rotation of the output portion in a main direction,
the first bearing is arranged in the direction of the thrust force with respect to the second bearing;
The outer diameter (D2) of the second bearing is set smaller than the outer diameter (D1) of the first bearing and the maximum outer diameter (D3) of the rotating shaft,
The rotating shaft is provided with a contact portion (24) that contacts the first bearing in the direction of the thrust force and the iron core in the axial direction ,
The iron core has an annular recess (14c) in an axial view, which is recessed in an axial end portion of the iron core on the first bearing side, at a position on the inner peripheral side of the magnet,
The rotating electrical machine, wherein the contact portion is positioned in the recess on the side of the first bearing and is in contact with an axial end surface of the recess. 前記回転軸は、該回転軸と一体回転する前記出力部（Ｘ）が内側に挿入されて連結される筒状の連結部（２１）を有し、
前記第２軸受は、前記回転軸において前記連結部よりも小径をなす被支持部（２３）を支持する、請求項１に記載の回転電機。 The rotating shaft has a cylindrical connecting portion (21) into which the output portion (X) that rotates integrally with the rotating shaft is inserted and connected,
The rotary electric machine according to claim 1, wherein the second bearing supports a supported portion (23) having a diameter smaller than that of the connecting portion on the rotating shaft. 前記回転軸には、前記当接部（２４）と、前記第２軸受に対して前記スラスト力の反対方向に当接する第２当接部（２５）とが設けられている、請求項１又は請求項２に記載の回転電機。 2. The rotating shaft is provided with the contact portion (24) and a second contact portion (25) contacting the second bearing in a direction opposite to the thrust force. Or the rotating electric machine according to claim 2 . 前記鉄心は、該鉄心の前記第２軸受側の軸方向端部に凹設された軸方向視で環状の凹部（１４ｃ）を前記磁石の内周側の位置に有し、
前記第２軸受の少なくとも一部が前記凹部内に位置している、請求項１から請求項３のいずれか１項に記載の回転電機。 The iron core has an annular recess (14c) in an axial view, which is recessed in an axial end portion of the iron core on the side of the second bearing, at a position on the inner peripheral side of the magnet,
The rotating electric machine according to any one of claims 1 to 3, wherein at least a portion of said second bearing is positioned within said recess.
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JP2014113004A (en) 2012-12-05 2014-06-19 Toyota Motor Corp Control device for power transmission device
JP2015216820A (en) 2014-05-13 2015-12-03 本田技研工業株式会社 Motor structure
JP2016171642A (en) 2015-03-12 2016-09-23 Ntn株式会社 Motor drive unit
JP2017229162A (en) 2016-06-22 2017-12-28 株式会社ミツバ Rotary motor and assembly method of the same

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