JP2022008378A - Manufacturing method of rotor for rotary electric machine - Google Patents

Manufacturing method of rotor for rotary electric machine Download PDF

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JP2022008378A
JP2022008378A JP2021148615A JP2021148615A JP2022008378A JP 2022008378 A JP2022008378 A JP 2022008378A JP 2021148615 A JP2021148615 A JP 2021148615A JP 2021148615 A JP2021148615 A JP 2021148615A JP 2022008378 A JP2022008378 A JP 2022008378A
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main body
body portion
rotor
shaft
shaft end
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洋 緒方
Hiroshi Ogata
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Meidensha Corp
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Meidensha Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Abstract

PROBLEM TO BE SOLVED: To provide a rotor capable of handling higher speed rotation and lower inertia.
SOLUTION: In a rotor 110 of a rotary electric machine including a main body portion 111 having a cylindrical form, a first shaft end portion 112 coaxially provided on one end side of the main body portion 111, and a second shaft end portion 113 having a cylindrical form is provided on the other end side of the main body portion 111, the second shaft end portion 113 includes: a shaft part 114 to which a bearing 119 is attached with a smaller diameter than the main body portion 111; and a joint part 115 that is located between the main body portion 111 and the shaft portion 114 and has the same diameter as the main body portion 111, and is pressed against the other end surface of the main body portion 111.
SELECTED DRAWING: Figure 1
COPYRIGHT: (C)2022,JPO&INPIT

Description

本発明は、発電機や電動機等の回転電機の製造方法に関し、特に、高速回転性や低慣性を求められるサーボモータ等のロータに適用すると有効なものである。 The present invention relates to a method for manufacturing a rotary electric machine such as a generator or an electric motor, and is particularly effective when applied to a rotor such as a servomotor that requires high-speed rotation and low inertia.

発電機や電動機等の回転電機の従来のロータの一例を図３に示す。
図３に示すように、内部中空の円筒形をなす本体部１１は、一端側（図３中、左端側）が閉塞し、他端側（図３中、右端側）が開口している。本体部１１の一端側には、本体部１１の外径よりも小さい外径をなす第一の軸端部１２が同軸をなして突設されている。本体部１１の他端側には、第二の軸端部１３が同軸をなして設けられている。 FIG. 3 shows an example of a conventional rotor of a rotary electric machine such as a generator or an electric motor.
As shown in FIG. 3, one end side (left end side in FIG. 3) of the main body portion 11 having an internal hollow cylindrical shape is closed, and the other end side (right end side in FIG. 3) is open. On one end side of the main body portion 11, a first shaft end portion 12 having an outer diameter smaller than the outer diameter of the main body portion 11 is projected coaxially. A second shaft end portion 13 is provided coaxially on the other end side of the main body portion 11.

前記第二の軸端部１３は、本体部１１の外径よりも小さいものの前記第一の軸端部１２の最大外径よりも大きい最大外径を有する円筒形をなすシャフト部１４と、本体部１１とシャフト部１４との間に同軸をなして位置して当該本体部１１の外径と同じ大きさの外径の環状をなすフランジ部１５とからなっている。 The second shaft end portion 13 has a cylindrical shaft portion 14 having a maximum outer diameter smaller than the outer diameter of the main body portion 11 but larger than the maximum outer diameter of the first shaft end portion 12, and a main body. The flange portion 15 is located coaxially between the portion 11 and the shaft portion 14 and forms an annular shape having the same outer diameter as the outer diameter of the main body portion 11.

第二の軸端部１３のフランジ部１５の周縁には、ボルト１６が当該フランジ部１５の周方向に沿って所定の間隔で複数貫通している。これらボルト１６は、本体部１１の他端面（図３中、右端面）にそれぞれ螺合している。本体部１１の外周面上には、永久磁石１７が当該外周面を覆うようにして取り付けられている。第一の軸端部１２には、軸受１８が同軸をなして取り付けられている。第二の軸端部１３のシャフト部１４には、軸受１９が同軸をなして取り付けられている。 A plurality of bolts 16 penetrate the peripheral edge of the flange portion 15 of the second shaft end portion 13 at predetermined intervals along the circumferential direction of the flange portion 15. These bolts 16 are screwed to the other end surface (right end surface in FIG. 3) of the main body portion 11, respectively. A permanent magnet 17 is attached on the outer peripheral surface of the main body 11 so as to cover the outer peripheral surface. A bearing 18 is coaxially attached to the first shaft end portion 12. A bearing 19 is coaxially attached to the shaft portion 14 of the second shaft end portion 13.

このような従来のロータ１０においては、円柱形をなす第一の素材を切削加工することにより、一端側に第一の軸端部１２を形成すると共に、他端側に開口部を有する内部中空の本体部１１を形成する一方、円柱形をなす第二の素材を切削加工することにより、円筒形をなすシャフト部１４及び環状をなすフランジ部１５を有する第二の軸端部１３を形成した後、本体部１１の他端側に第二の軸端部１３のフランジ部１５をボルト１６で締め付け固定すると共に、本体部１１の外周面に永久磁石１７を取り付けることにより、製造することができる。 In such a conventional rotor 10, by cutting a first material forming a cylindrical shape, a first shaft end portion 12 is formed on one end side and an internal hollow having an opening on the other end side. While forming the main body portion 11 of the above, by cutting a second material forming a cylindrical shape, a second shaft end portion 13 having a cylindrical shaft portion 14 and an annular flange portion 15 was formed. After that, it can be manufactured by tightening and fixing the flange portion 15 of the second shaft end portion 13 to the other end side of the main body portion 11 with a bolt 16 and attaching a permanent magnet 17 to the outer peripheral surface of the main body portion 11. ..

このようにして製造された従来のロータ１０においては、本体部１１及び第二の軸端部１３が内部中空となっているので、高速回転性や低慣性に対応することができる。 In the conventional rotor 10 manufactured in this way, since the main body portion 11 and the second shaft end portion 13 are hollow inside, it is possible to cope with high-speed rotation and low inertia.

特開２００５－０２７４４０号公報Japanese Unexamined Patent Publication No. 2005-027440

前述したようなロータ１０においては、更なる高速回転性や低慣性に対応できるようにすることが強く望まれている。 In the rotor 10 as described above, it is strongly desired to be able to cope with further high-speed rotation and low inertia.

前述した課題を解決するための、本発明に係る回転電機のロータは、円筒形をなす本体部と、前記本体部の一端側に同軸をなして設けられる第一の軸端部と、前記本体部の他端側に同軸をなして設けられる円筒形をなす第二の軸端部とを備えている回転電機のロータにおいて、前記第二の軸端部が、前記本体部よりも小径をなして軸受を取り付けられるシャフト部と、前記本体部と前記シャフト部との間に位置して当該本体部と同径をなすと共に当該本体部の他端面に圧接された接合部とからなることを特徴とする。 The rotor of the rotary electric machine according to the present invention for solving the above-mentioned problems has a cylindrical main body portion, a first shaft end portion coaxially provided on one end side of the main body portion, and the main body portion. In a rotor of a rotary electric machine provided with a second shaft end portion having a cylindrical shape provided coaxially on the other end side of the portion, the second shaft end portion has a smaller diameter than the main body portion. It is characterized by consisting of a shaft portion to which a bearing can be attached, a joint portion located between the main body portion and the shaft portion, having the same diameter as the main body portion, and being pressure-welded to the other end surface of the main body portion. And.

また、本発明に係る回転電機のロータは、上述した回転電機のロータにおいて、前記本体部の他端面と前記第二の軸端部の前記接合部とが摩擦圧接で接合されたものであることを特徴とする。 Further, the rotor of the rotary electric machine according to the present invention is the rotor of the rotary electric machine described above, in which the other end surface of the main body portion and the joint portion of the second shaft end portion are joined by friction welding. It is characterized by.

他方、本発明に係る回転電機のロータの製造方法は、上述した回転電機のロータの製造方法であって、前記本体部の他端面と前記第二の軸端部の前記接合部とを摩擦圧接により接合することを特徴とする。 On the other hand, the method for manufacturing a rotor of a rotary electric machine according to the present invention is the above-mentioned method for manufacturing a rotor of a rotary electric machine, in which the other end surface of the main body portion and the joint portion of the second shaft end portion are friction-welded. It is characterized by joining by.

本発明に係る回転電機のロータ及びその製造方法によれば、本体部の他端面と第二の軸端部の接合部とが圧接接合されていることから、従来のロータよりも本体部の外径サイズ及び軸方向の長さを小さくすることができると共に本体部の肉厚（ヨーク部の厚さ）も薄くすることができるので、従来のロータよりも更に軽量化及び小型化を図ることができ、従来のロータよりも更なる高速回転性や低慣性に対応することができる。 According to the rotor of the rotary electric machine according to the present invention and the manufacturing method thereof, since the other end surface of the main body portion and the joint portion of the second shaft end portion are pressure-welded and joined, the outside of the main body portion is larger than that of the conventional rotor. Since the diameter size and the axial length can be reduced and the wall thickness of the main body (thickness of the yoke portion) can be reduced, it is possible to further reduce the weight and size of the rotor as compared with the conventional rotor. It is possible to cope with higher speed rotation and lower inertia than conventional rotors.

本発明に係る回転電機のロータの主な実施形態の概略構成図である。It is a schematic block diagram of the main embodiment of the rotor of the rotary electric machine which concerns on this invention. 本発明に係る回転電機のロータの製造方法の主な実施形態の手順説明図である。It is a procedure explanatory drawing of the main embodiment of the manufacturing method of the rotor of the rotary electric machine which concerns on this invention. 従来のロータの一例の概略構成図である。It is a schematic block diagram of an example of a conventional rotor.

本発明に係る回転電機のロータ及びその製造方法の実施形態を図面に基づいて説明するが、本発明は図面に基づいて説明する以下の実施形態のみに限定されるものではない。 An embodiment of a rotor of a rotary electric machine and a method for manufacturing the same according to the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments described with reference to the drawings.

〈主な実施形態〉
本発明に係る回転電機のロータ及びその製造方法の主な実施形態を図１，２に基づいて説明する。 <Main embodiment>
A main embodiment of a rotor of a rotary electric machine and a method for manufacturing the same according to the present invention will be described with reference to FIGS. 1 and 2.

図１に示すように、内部中空の円筒形をなす本体部１１１は、一端側（図１中、左端側）が閉塞し、他端側（図１中、右端側）が開口している。本体部１１１の一端側には、本体部１１１の外径よりも小さい外径をなす第一の軸端部１１２が同軸をなして突設されている。本体部１１１の他端側には、第二の軸端部１１３が同軸をなして設けられている。 As shown in FIG. 1, one end side (left end side in FIG. 1) of the main body portion 111 having an internal hollow cylindrical shape is closed, and the other end side (right end side in FIG. 1) is open. A first shaft end portion 112 having an outer diameter smaller than the outer diameter of the main body portion 111 is provided coaxially on one end side of the main body portion 111. A second shaft end portion 113 is provided coaxially on the other end side of the main body portion 111.

前記第二の軸端部１１３は、本体部１１１の外径よりも小さいものの前記第一の軸端部１１２の最大外径よりも大きい最大外径を有する円筒形をなすシャフト部１１４と、本体部１１１とシャフト部１１４との間に同軸をなして位置して当該本体部１１１の外径と同じ大きさの外径の円筒形をなす接合部１１５とからなっている。 The second shaft end portion 113 includes a cylindrical shaft portion 114 having a maximum outer diameter smaller than the outer diameter of the main body portion 111 but larger than the maximum outer diameter of the first shaft end portion 112, and a main body. The joint portion 115 is located coaxially between the portion 111 and the shaft portion 114 and has a cylindrical shape having the same outer diameter as the outer diameter of the main body portion 111.

第二の軸端部１１３の接合部１１５の円筒形の端面は、本体部１１１の円筒形の他端面（図１中、右端面）に同軸をなして圧接接合されている。本体部１１１及び第二の軸端部１１３の接合部１１５の外周面上には、永久磁石１１７が当該外周面を覆うようにして取り付けられている。第一の軸端部１１２には、軸受１１８が同軸をなして取り付けられている。第二の軸端部１１３のシャフト部１１４には、軸受１１９が同軸をなして取り付けられている。 The cylindrical end surface of the joint portion 115 of the second shaft end portion 113 is coaxially pressure-welded to the other end surface (right end surface in FIG. 1) of the cylinder of the main body portion 111. A permanent magnet 117 is attached on the outer peripheral surface of the joint portion 115 of the main body portion 111 and the second shaft end portion 113 so as to cover the outer peripheral surface. A bearing 118 is coaxially attached to the first shaft end portion 112. A bearing 119 is coaxially attached to the shaft portion 114 of the second shaft end portion 113.

このような本実施形態に係るロータ１１０においては、図２に示すように、円柱形をなす第一の素材１０１の内部に中空部を形成するように他端側から内部を切削加工する一方、円柱形をなす第二の素材１０２を円筒形に形成するように内部を切削加工すると共に、第二の素材１０２の一端部（図２中、左端部）に接合部１１５を有するように一端側（図２中、左端側）を切削加工する。 In the rotor 110 according to the present embodiment as described above, as shown in FIG. 2, the inside is machined from the other end side so as to form a hollow portion inside the first material 101 having a cylindrical shape. The inside of the second material 102 forming a cylindrical shape is machined so as to form a cylindrical shape, and one end side of the second material 102 has a joint portion 115 at one end (left end in FIG. 2). (The left end side in FIG. 2) is machined.

続いて、第一の素材１０１の円筒形の他端面（図２中、右端面）と第二の素材１０２の一端部（図２中、左端部）の接合部１１５の円筒形の一端面（図２中、左端面）とを同軸上で突合わせして加圧しながら相対的に回転させて摩擦熱を加える摩擦圧接を行うことにより、第一の素材１０１と第二の素材１０２とを一体的に接合した後、第一の素材１０１の一端側（図２中、左端側）に第一の軸端部１１２を形成するように切削加工を施すと共に、第二の素材１０２の他端側（図２中、右端側）に第二の軸端部１１３のシャフト部１１４を形成するように切削加工を施す。 Subsequently, one end surface of the cylinder of the joint portion 115 between the other end surface of the cylinder of the first material 101 (the right end surface in FIG. 2) and one end of the second material 102 (the left end surface in FIG. 2) (the left end surface in FIG. 2). The first material 101 and the second material 102 are integrated by performing friction welding in which frictional heat is applied by abutting the left end surface in FIG. 2 on the same axis and rotating the material relatively while applying pressure. After being welded, a cutting process is performed so as to form the first shaft end portion 112 on one end side (left end side in FIG. 2) of the first material 101, and the other end side of the second material 102. Cutting is performed so as to form the shaft portion 114 of the second shaft end portion 113 (on the right end side in FIG. 2).

そして、図１に示されているように、本体部１１１及び第二の軸端部１１３の接合部１１５の外周面に永久磁石１１７を取り付けることにより、製造することができる。 Then, as shown in FIG. 1, it can be manufactured by attaching a permanent magnet 117 to the outer peripheral surface of the joint portion 115 of the main body portion 111 and the second shaft end portion 113.

つまり、従来は、本体部１１の他端面に対して第二の軸端部１３のフランジ部１５をボルト１６で締め付け固定することによりロータ１０を製造するようにしていたが、本実施形態においては、本体部１１１の他端面に対して第二の軸端部１１３の接合部１１５を摩擦圧接で突合わせ接合することによりロータ１１０を製造するようにしたのである。 That is, conventionally, the rotor 10 is manufactured by tightening and fixing the flange portion 15 of the second shaft end portion 13 to the other end surface of the main body portion 11 with a bolt 16. However, in the present embodiment, the rotor 10 is manufactured. The rotor 110 is manufactured by butt-welding the joint portion 115 of the second shaft end portion 113 to the other end surface of the main body portion 111 by friction welding.

このため、本実施形態に係るロータ１１０においては、従来のロータ１０よりも本体部１１１の外径サイズ及び軸方向の長さを小さくすることができると共に本体部１１１の肉厚（ヨーク部の厚さ）も薄くすることができるので、従来のロータ１０よりも更に軽量化及び小型化を図ることができる。 Therefore, in the rotor 110 according to the present embodiment, the outer diameter size and the axial length of the main body portion 111 can be made smaller than those of the conventional rotor 10, and the wall thickness of the main body portion 111 (thickness of the yoke portion) can be reduced. Since it can be made thinner, it is possible to further reduce the weight and size of the rotor 10 as compared with the conventional rotor 10.

したがって、本実施形態に係るロータ１１０によれば、従来よりも更なる高速回転性や低慣性に対応することができる。 Therefore, according to the rotor 110 according to the present embodiment, it is possible to cope with higher speed rotation and lower inertia than before.

〈他の実施形態〉
なお、前述した実施形態においては、本体部１１１の他端面と第二の軸端部１１３の接合部１１５とを突合わせして加圧しながら相対的に回転させて摩擦熱を加える摩擦圧接により接合した場合について説明したが、他の実施形態として、例えば、突合わせして加圧しながら高周波誘導で熱を加える高周波誘導圧接（溶接）や、突合わせして加圧しながら高周波電流を直接流して電気抵抗熱を加える高周波抵抗圧接（溶接）等の高周波圧接（溶接）等のように、突合わせして加圧しながら熱を加えて接合する圧接（溶接）であれば、前述した実施形態の場合と同様に適用可能である。 <Other embodiments>
In the above-described embodiment, the other end surface of the main body 111 and the joint 115 of the second shaft end 113 are butted against each other and relatively rotated while being pressurized to be joined by friction welding to apply frictional heat. However, as another embodiment, for example, high-frequency induction welding (welding) in which heat is applied by high-frequency induction while butt-pressurizing, or high-frequency current is directly passed while butt-pressing and pressurizing to perform electricity. If it is a pressure welding (welding) in which heat is applied while abutting and pressurizing, as in the case of high frequency pressure welding (welding) such as high frequency resistance pressure welding (welding) in which resistance heat is applied, the case of the above-described embodiment is used. It is also applicable.

本発明に係る回転電機のロータ及びその製造方法は、従来のロータよりも更なる高速回転性や低慣性に対応することができるので、例えば、サーボモータ等のロータに極めて有益に利用することができる。 Since the rotor of a rotary electric machine and the manufacturing method thereof according to the present invention can cope with higher speed rotation and lower inertia than conventional rotors, they can be extremely usefully used for rotors such as servomotors, for example. can.

１０１ 第一の素材
１０２ 第二の素材
１１０ ロータ
１１１ 本体部
１１２ 第一の軸端部
１１３ 第二の軸端部
１１４ シャフト部
１１５ 接合部
１１７ 永久磁石
１１８ 軸受
１１９ 軸受 101 First material 102 Second material 110 Rotor 111 Main body 112 First shaft end 113 Second shaft end 114 Shaft 115 Joint 117 Permanent magnet 118 Bearing 119 Bearing

Claims (1)

円筒形をなす本体部と、
前記本体部の一端側に同軸をなして設けられる第一の軸端部と、
前記本体部の他端側に同軸をなして設けられる円筒形をなす第二の軸端部と、
を備えている回転電機のロータにおいて、
前記第二の軸端部が、
前記本体部よりも小径をなして軸受を取り付けられるシャフト部と、
前記本体部と前記シャフト部との間に位置して当該本体部と同径をなすと共に当該本体部の他端面に圧接された接合部と
からなる回転機のロータの製造方法であって、
前記本体部の他端面と前記第二の軸端部の前記接合部とを摩擦圧接により接合することを特徴とする回転電機のロータの製造方法 The main body that forms a cylinder and
A first shaft end portion coaxially provided on one end side of the main body portion,
A cylindrical second shaft end provided coaxially on the other end side of the main body, and
In the rotor of a rotary electric machine equipped with
The second shaft end is
A shaft part that has a smaller diameter than the main body part and can mount bearings,
A method for manufacturing a rotor of a rotary machine, which is located between the main body portion and the shaft portion, has the same diameter as the main body portion, and is composed of a joint portion pressed against the other end surface of the main body portion.
A method for manufacturing a rotor of a rotary electric machine, characterized in that the other end surface of the main body portion and the joint portion of the second shaft end portion are joined by friction welding.
JP2021148615A 2018-11-30 2021-09-13 Manufacturing method of rotor for rotary electric machine Pending JP2022008378A (en)

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JP2018225591A JP2020089228A (en) 2018-11-30 2018-11-30 Rotor of rotary electric machine and manufacturing method of the same
JP2021148615A JP2022008378A (en) 2018-11-30 2021-09-13 Manufacturing method of rotor for rotary electric machine

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JP2005027440A (en) * 2003-07-03 2005-01-27 Honda Motor Co Ltd Rotor of rotating electric machine and its manufacturing method
JP2014158355A (en) * 2013-02-15 2014-08-28 Toyota Industries Corp Rotary electric machine and method for manufacturing the same

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JPH0710152B2 (en) * 1986-08-19 1995-02-01 エヌティエヌ株式会社 Motor for spindle
JP2005027440A (en) * 2003-07-03 2005-01-27 Honda Motor Co Ltd Rotor of rotating electric machine and its manufacturing method
JP2014158355A (en) * 2013-02-15 2014-08-28 Toyota Industries Corp Rotary electric machine and method for manufacturing the same

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