WO2013054438A1 - Rotator of rotating electric machine - Google Patents

Rotator of rotating electric machine Download PDF

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Publication number
WO2013054438A1
WO2013054438A1 PCT/JP2011/073663 JP2011073663W WO2013054438A1 WO 2013054438 A1 WO2013054438 A1 WO 2013054438A1 JP 2011073663 W JP2011073663 W JP 2011073663W WO 2013054438 A1 WO2013054438 A1 WO 2013054438A1
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WIPO (PCT)
Prior art keywords
shaft
core
rotor
laminated core
stacked
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PCT/JP2011/073663
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French (fr)
Japanese (ja)
Inventor
博久 横田
宏一 尾島
井上　正哉
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2013538409A priority Critical patent/JP6000270B2/en
Priority to PCT/JP2011/073663 priority patent/WO2013054438A1/en
Priority to CN201180072048.8A priority patent/CN103636102B/en
Publication of WO2013054438A1 publication Critical patent/WO2013054438A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Definitions

  • the present invention relates to a rotor of a rotating electrical machine, and more particularly to a fitting structure between a laminated core of a rotor of a rotating electrical machine and a shaft in an electrical motor or the like.
  • a laminated core of a rotor used for an electric motor or a generator is formed by stamping, stacking, and caulking a metal plate such as a silicon steel plate or an electric mild steel plate. Thereafter, the rotor is completed by press-fitting a shaft into the laminated core formed in this way and inserting a magnet or winding.
  • Patent Document 1 An example of such a rotor structure of a rotating electrical machine is disclosed in Patent Document 1.
  • Patent Document 1 four protrusions extending in the axial direction are arranged at equal intervals in the circumferential direction at a portion where the laminated core on the outer peripheral surface of the shaft is fixed.
  • the outer diameter of the shaft that does not include the protruding portion is formed slightly smaller than the inner diameter of the laminated core
  • the outer diameter of the shaft that includes the protruding portion is formed slightly larger than the inner diameter of the laminated core
  • the protruding portion is 2 It is divided by two dividing grooves.
  • Patent Document 2 Another conventional example is disclosed in Patent Document 2.
  • a protrusion 2a is provided on the fitting surface of the rotating shaft 2 with the rotor core 3 so as to be substantially even in the axial direction, as shown in FIG.
  • the positions in the circumferential direction are different from each other.
  • the protrusions bite into the new part of the rotor core 3 on the opposite side of the press-fitting, and there is no wear of the biting grooves, so that the rotor core engages with the rotor core.
  • the portions where the protrusions are formed are distributed almost uniformly in the axial direction, the rotating shaft 2 and the rotor core 3 can be obtained with a strong fitting force in a well-balanced manner.
  • JP 2004-343970 A Japanese Utility Model Publication No. 57-47840
  • the ridges that are initially press-fitted into the laminated core are crushed by being pressed into the entire axial length of the laminated core. Therefore, when the press-fitting length is long, there is a problem in that the bonding force with the laminated core is greatly reduced.
  • the present invention has been made to solve the above-described problems, and suppresses shaft runout without causing special equipment, processing, and an increase in the number of parts, and the sufficient relationship between the laminated core and the shaft.
  • An object of the present invention is to provide a rotor for a rotating electrical machine having a proper fitting force.
  • the rotor of the rotating electrical machine is the rotor of the rotating electrical machine configured such that the shaft is press-fitted into the through hole provided in the central portion of the laminated core.
  • An axially extending ridge that fits with the inner wall is formed, and the laminated core is divided into stacked core portions with a predetermined interval in the axial direction, and the penetrations for each of the divided stacked core portions In the circumferential inner wall of the hole, an escape groove that does not fit with the protruding portion is formed.
  • the position of the relief groove formed for each of the thick core portions is formed at a position different from the escape groove of the other thick core portions in the circumferential direction.
  • the shaft vibration of the rotating electrical machine having a sufficient fitting force between the laminated core and the shaft is suppressed without causing special equipment, processing, and an increase in the number of parts.
  • a rotor can be obtained.
  • FIG. 3 is a side sectional view showing the configuration of the rotor of the rotary electric machine according to Embodiment 1 of the present invention.
  • FIG. 3 is a cross-sectional view taken along line BB and CC in FIG. 1. It is a sectional side view which shows an example of the rotor of the conventional rotary electric machine.
  • FIG. Embodiment 1 of the present invention will be described in detail below with reference to the drawings.
  • symbol shall show the same or an equivalent part.
  • FIG. 1 is a side sectional view showing a schematic configuration of the rotor of the rotating electric machine according to the first embodiment
  • FIG. 2 is a sectional view taken along lines BB and CC in FIG. 1 and 2, the rotor is press-fitted with a shaft 2 into a laminated core 3 and is fitted by a protrusion 2a.
  • a magnet (not shown) is disposed on the laminated core 3.
  • the laminated core 3 is formed with a relief groove 3a of a ridge portion 2a formed on the outer peripheral surface of the shaft 2 on the inner peripheral surface.
  • the laminated core 3 is laminated.
  • the inner peripheral surface of the core 3 is not fitted to the entire outer peripheral surface of the shaft 2. That is, the laminated core 3 is divided into stacked core portions 3b and 3c having a predetermined interval (that is, a predetermined length) in the axial direction, and for each stacked core portion 3b and 3c, An escape groove 3a that does not fit with the protrusion 2a is formed.
  • the escape groove 3a formed in the stacked core portion 3b and the escape groove 3a formed in the stacked core portion 3c are configured to be different from each other in the circumferential direction. Has been.
  • the outer diameter of the shaft 2 including the protruding portion 2 a is formed to be slightly larger than the inner diameter of the laminated core 3.
  • the outer diameter of the shaft 2 that does not include the protrusions 2a is set to be equal to or slightly smaller than the inner diameter of the laminated core 3, but is slightly larger than the inner diameter of the laminated core 3 if it is smaller than the height of the shaft protrusion 2a. But there is no functional problem.
  • the fitting structure between the shaft 2 and the laminated core 3 is formed as follows.
  • the shaft 2 is press-fitted into the laminated core 3 from the X direction in the drawing.
  • the outer diameter of the shaft including the protruding portion 2 a is formed larger than the inner diameter of the laminated core 3. It is crushed by fitting.
  • the protrusions 2a are all fitted to the inner periphery of the laminated core 3, the protrusions 2a are crushed and the fitting with the laminated core 3 in the latter half is weakened when the press-fitting length is long.
  • the relief groove 3a of the protruding portion is formed for each stacked core portion 3b, 3c formed by dividing the laminated core 3 in the axial direction.
  • the ridge 2a is not crushed.
  • the shaft is press-fitted into the thick core portion 3c. Since the protruding portion 2a of the shaft press-fitted into the stacked core portion 3c is fitted with the protruding portion 2a located in the escape groove 3a in the stacked core portion 3b, without reducing the fitting force, The stacked core portion 3c and the shaft can be fitted.
  • the present invention can be applied even if the stacked thickness (that is, the axial length or interval) of the stacked core portions 3b and 3c for each block is not constant. That is, the fitting force can be adjusted by changing the thickness of the stacked core portions 3b and 3c. Moreover, the fitting force can be set for each thick core portion by adjusting the number of the relief grooves 3a of the protruding portion for each thick core portion 3b, 3c.
  • the protruding portion 2a provided in the laminated core 3 has a structure in which all the protruding portions 2a are not fitted into the press-fitting portions. Since the relief groove 3a of the protruding portion is formed at a predetermined interval, that is, for each stacked core portion having a certain length or for each non-constant stacked core portion, the press-fitting portion of the first stacked core portion 3b is formed. When the process is finished, in the next stacked core portion 3c, a protruding portion different from the previous protruding portion secures the fitting force between the stacked core 3c and the shaft. Accordingly, it is possible to always ensure a sufficient fitting force with the shaft in any stacked core portion.
  • each of the thick core portions 3b and 3c always has a constant fitting force, it is possible to reduce the influence of the crushing of the protrusions and the residual stress due to the metal lump caused by the press-fitting, so that the shaft by press-fitting Bending can be reduced.
  • the protrusion 2a formed on the outer peripheral surface of the shaft 2 can cope with any structure of equal intervals or unequal intervals. By adjusting the position of the relief groove 3a of the protruding portion provided in the stacked core portion and the position of the protruding portion 2a, it is possible to adjust the fitting force between the stacked core portion and the shaft and to secure the fitting force.
  • the laminated core 3 is divided into stacked core portions 3b and 3c having a constant interval (that is, a fixed length), and a relief groove 3a of the shaft protrusion 2a is formed for each stacked core portion 3b and 3c.
  • the fitting force can be set for each stacked core part.
  • the laminated core 3 is divided into stacked core portions that are not at regular intervals, and the clearance groove 3a of the shaft protrusion is formed for each stacked core portion, so that the stacked core portion is adjusted in thickness. Thus, it is possible to adjust the fitting force between each thick core portion and the shaft.
  • the relief groove 3a of the protruding portion 2a of the shaft formed on the laminated core 3 side also has an effect of reducing the weight of the laminated core 3. It is possible to reduce the weight of the laminated core by enlarging the escape groove 3a.
  • a laminated core of a rotor generally used for a rotor of an electric motor is formed by punching and stacking and pressing a metal plate such as a silicon steel plate or an electric mild steel plate.
  • a metal plate such as a silicon steel plate or an electric mild steel plate.
  • the present invention is suitable for use in a fitting structure of a laminated core of a rotor and a shaft of an electric motor in an electric motor or the like.

Abstract

A rotator of a rotating electric machine that is constructed by press-fitting a shaft (2) into a penetration hole created in a laminated core (3), wherein protruded strip sections (2a) for engaging with the inner wall of the penetration hole are formed on the outer circumferential surface of the shaft (2), the laminated core (3) is segmented into stacked core sections (3b, 3c) having predetermined distances in the axial direction, and relief grooves (3a), which do not engage with the protruded strip sections (2a), are formed in the circumferential direction on the inner walls of the respective stacked core sections (3b, 3c).

Description

回転電機の回転子Rotating electrical machine rotor
　この発明は回転電機の回転子に関し、特に、電装用モーター等における回転電機の回転子の積層コアとシャフトとの嵌合構造に関するものである。 The present invention relates to a rotor of a rotating electrical machine, and more particularly to a fitting structure between a laminated core of a rotor of a rotating electrical machine and a shaft in an electrical motor or the like.
　一般に電動機や発電機に使用される回転子の積層コアは、珪素鋼板や電機軟鋼板等の金属板をプレスで打ち抜いて積み重ね、かしめることにより形成される。その後、このようにして形成された積層コアにシャフトを圧入し、磁石を挿入もしくは巻線等を施すことにより回転子が完成する。 Generally, a laminated core of a rotor used for an electric motor or a generator is formed by stamping, stacking, and caulking a metal plate such as a silicon steel plate or an electric mild steel plate. Thereafter, the rotor is completed by press-fitting a shaft into the laminated core formed in this way and inserting a magnet or winding.
　このような回転電機の回転子構造の一例として、特許文献１に示されるものがある。
特許文献１に示されるものは、シャフトの外周面の積層コアが固定される部位に、軸方向に延びる４つの突条部が周方向に等間隔で配置されている。突条部を含まないシャフトの外径は、積層コアの内径より若干小さく形成されており、突条部を含むシャフトの外径は積層コアの内径より若干大きく形成され、突条部は、２つの分割溝により分割されている。 An example of such a rotor structure of a rotating electrical machine is disclosed in Patent Document 1.
In Patent Document 1, four protrusions extending in the axial direction are arranged at equal intervals in the circumferential direction at a portion where the laminated core on the outer peripheral surface of the shaft is fixed. The outer diameter of the shaft that does not include the protruding portion is formed slightly smaller than the inner diameter of the laminated core, the outer diameter of the shaft that includes the protruding portion is formed slightly larger than the inner diameter of the laminated core, and the protruding portion is 2 It is divided by two dividing grooves.
また、他の従来例として、特許文献２に示されるものがある。この特許文献２に示されるものは、図３に示すように、回転軸２の回転子鉄心３との嵌合面に、軸方向にほぼ均等に突条部２ａを設け、突条部２ａの周方向の位置をそれぞれ異ならせるように構成している。この構成によって、回転軸２に回転子鉄心３を圧入したときに、圧入の反対側における回転子鉄心３の新しい部分に突条部がくい込み、くい込み溝の磨耗がないので回転子鉄心とのかみ合いが強固で確実な結合が得られ、しかも突条部の形成箇所が軸方向にほぼ均等に分布されているので、回転軸２と回転子鉄心３を強い嵌合力でバランスよく得ることができる。 Another conventional example is disclosed in Patent Document 2. As shown in FIG. 3, a protrusion 2a is provided on the fitting surface of the rotating shaft 2 with the rotor core 3 so as to be substantially even in the axial direction, as shown in FIG. The positions in the circumferential direction are different from each other. With this configuration, when the rotor core 3 is press-fitted into the rotating shaft 2, the protrusions bite into the new part of the rotor core 3 on the opposite side of the press-fitting, and there is no wear of the biting grooves, so that the rotor core engages with the rotor core. However, since the portions where the protrusions are formed are distributed almost uniformly in the axial direction, the rotating shaft 2 and the rotor core 3 can be obtained with a strong fitting force in a well-balanced manner.
特開２００４－３４３９７０号公報JP 2004-343970 A 実開昭５７－４７８４０号公報Japanese Utility Model Publication No. 57-47840
　上記のような従来の構造では、積層コアに最初に圧入された突条部は積層コア全軸長に圧入されることで、突条部はつぶされていく。そのため圧入長が長い場合、積層コアとの結合力は大幅に低下するという問題点があった。 In the conventional structure as described above, the ridges that are initially press-fitted into the laminated core are crushed by being pressed into the entire axial length of the laminated core. Therefore, when the press-fitting length is long, there is a problem in that the bonding force with the laminated core is greatly reduced.
　この発明は、上記のような問題点を解消するためになされたもので、特別な設備や加工及び部品点数の増加を招くことなく、シャフトの軸振れを抑制し、積層コアとシャフトとの十分な嵌合力を有する回転電機の回転子を提供することを目的とする。 The present invention has been made to solve the above-described problems, and suppresses shaft runout without causing special equipment, processing, and an increase in the number of parts, and the sufficient relationship between the laminated core and the shaft. An object of the present invention is to provide a rotor for a rotating electrical machine having a proper fitting force.
　この発明に係る回転電機の回転子は、積層コアの中央部に設けられた貫通孔に、シャフトが圧入されて構成される回転電機の回転子において、前記シャフトの外周面に、前記貫通孔の内壁と嵌合する軸方向に延びる突条部が形成されると共に、前記積層コアは、軸方向に所定の間隔の積厚コア部に区分され、区分された各積厚コア部毎の前記貫通孔の周方向内壁に、前記突条部と嵌合しない逃げ溝が形成されたものである。
The rotor of the rotating electrical machine according to the present invention is the rotor of the rotating electrical machine configured such that the shaft is press-fitted into the through hole provided in the central portion of the laminated core. An axially extending ridge that fits with the inner wall is formed, and the laminated core is divided into stacked core portions with a predetermined interval in the axial direction, and the penetrations for each of the divided stacked core portions In the circumferential inner wall of the hole, an escape groove that does not fit with the protruding portion is formed.
　また、前記各積厚コア部毎に形成される逃げ溝の位置が、互いに他の積厚コア部の逃げ溝とは周方向において異なる位置に形成されたものである。 Moreover, the position of the relief groove formed for each of the thick core portions is formed at a position different from the escape groove of the other thick core portions in the circumferential direction.
　この発明の回転電機の回転子によれば、特別な設備や加工及び部品点数の増加を招くことなく、シャフトの軸振れを抑制し、積層コアとシャフトとの十分な嵌合力を有する回転電機の回転子を得ることができるものである。 According to the rotor of the rotating electrical machine of the present invention, the shaft vibration of the rotating electrical machine having a sufficient fitting force between the laminated core and the shaft is suppressed without causing special equipment, processing, and an increase in the number of parts. A rotor can be obtained.
　　上述した、またその他の、この発明の目的、特徴、効果は、以下の実施の形態における詳細な説明および図面の記載からより明らかとなるであろう。 The above-described and other objects, features, and effects of the present invention will become more apparent from the detailed description and drawings in the following embodiments.
この発明の実施の形態1の回転電機の回転子の構成を示す側断面図である。FIG. 3 is a side sectional view showing the configuration of the rotor of the rotary electric machine according to Embodiment 1 of the present invention. 図１のＢ－Ｂ線およびＣ－Ｃ線に沿う断面図である。FIG. 3 is a cross-sectional view taken along line BB and CC in FIG. 1. 従来の回転電機の回転子の一例を示す側断面図である。It is a sectional side view which shows an example of the rotor of the conventional rotary electric machine.
実施の形態１．
　以下、この発明の実施の形態１について、図面を参照して詳述する。なお、各図中、同一符号は、同一または相当部分を示すものとする。
図１は実施の形態1の回転電機の回転子の概略構成を示す側断面図、図２は図１のＢ－Ｂ線およびＣ－Ｃ線に沿う断面図である。
図１、図２において、回転子は積層コア３へシャフト２を圧入して突条部２ａにより嵌合されている。積層コア３には図示しない磁石が配置されている。 Embodiment 1 FIG.
Embodiment 1 of the present invention will be described in detail below with reference to the drawings. In addition, in each figure, the same code | symbol shall show the same or an equivalent part.
FIG. 1 is a side sectional view showing a schematic configuration of the rotor of the rotating electric machine according to the first embodiment, and FIG. 2 is a sectional view taken along lines BB and CC in FIG.
1 and 2, the rotor is press-fitted with a shaft 2 into a laminated core 3 and is fitted by a protrusion 2a. A magnet (not shown) is disposed on the laminated core 3.
　積層コア３には、内周面に、シャフト２の外周面に形成された突条部２ａの逃げ溝３ａが形成されており、シャフト２を積層コア３の貫通孔に圧入した場合に、積層コア３の内周面がシャフト２の外周面全域とは嵌合されない構造となっている。
即ち、積層コア３は、軸方向に所定間隔（即ち所定長さ）の積厚コア部３ｂ、３ｃに区分されており、各積厚コア部３ｂ、３ｃ毎に、それぞれの周方向内壁に、突条部２ａとは嵌合しない逃げ溝３ａが形成されている。
　そして、図２から明らかなように、積厚コア部３ｂに形成される逃げ溝３ａと、積厚コア部３ｃに形成される逃げ溝３ａとは、周方向において互いに異なる位置となるように構成されている。 The laminated core 3 is formed with a relief groove 3a of a ridge portion 2a formed on the outer peripheral surface of the shaft 2 on the inner peripheral surface. When the shaft 2 is press-fitted into the through hole of the laminated core 3, the laminated core 3 is laminated. The inner peripheral surface of the core 3 is not fitted to the entire outer peripheral surface of the shaft 2.
That is, the laminated core 3 is divided into stacked core portions 3b and 3c having a predetermined interval (that is, a predetermined length) in the axial direction, and for each stacked core portion 3b and 3c, An escape groove 3a that does not fit with the protrusion 2a is formed.
As is apparent from FIG. 2, the escape groove 3a formed in the stacked core portion 3b and the escape groove 3a formed in the stacked core portion 3c are configured to be different from each other in the circumferential direction. Has been.
　突条部２ａを含むシャフト２の外径は、積層コア３の内径より若干大きくなるように形成されている。突条部２ａを含まないシャフト２の外径は積層コア３の内径より同等もしくは若干小さくなるよう設定されているが、シャフト突条部２ａの高さより小さければ、積層コア３の内径より若干大きくても機能上問題はない。 The outer diameter of the shaft 2 including the protruding portion 2 a is formed to be slightly larger than the inner diameter of the laminated core 3. The outer diameter of the shaft 2 that does not include the protrusions 2a is set to be equal to or slightly smaller than the inner diameter of the laminated core 3, but is slightly larger than the inner diameter of the laminated core 3 if it is smaller than the height of the shaft protrusion 2a. But there is no functional problem.
　シャフト２と積層コア３との嵌合構造は次のように形成される。
図１において、シャフト２は図中のＸ方向から積層コア３に圧入される。
シャフト２が積層コア３の貫通孔に圧入されていくと、突条部２ａを含むシャフト外径は積層コア３の内径よりも大きく形成されているため、突条部２ａは積層コア３との嵌合により潰される。積層コア３の内周に突条部２ａがすべて嵌合していると、圧入長が長い場合は突条部２ａが潰され後半の積層コア３との嵌合が弱くなる。 The fitting structure between the shaft 2 and the laminated core 3 is formed as follows.
In FIG. 1, the shaft 2 is press-fitted into the laminated core 3 from the X direction in the drawing.
When the shaft 2 is press-fitted into the through hole of the laminated core 3, the outer diameter of the shaft including the protruding portion 2 a is formed larger than the inner diameter of the laminated core 3. It is crushed by fitting. When the protrusions 2a are all fitted to the inner periphery of the laminated core 3, the protrusions 2a are crushed and the fitting with the laminated core 3 in the latter half is weakened when the press-fitting length is long.
　この発明の実施の形態１においては、積層コア３を軸方向に区分して形成された積厚コア部３ｂ、３ｃ毎に突条部の逃げ溝３ａが形成されているため、圧入により全ての突条部２ａが潰されることはない。
図１において、積厚コア部３ｂの圧入が完了すると、積厚コア部３ｃにシャフトが圧入される。積厚コア部３ｃに圧入されるシャフトの突条部２ａは、積厚コア部３ｂで逃げ溝３ａに位置していた突条部２ａで嵌合されるため、嵌合力を低下させることなく、積厚コア部３ｃとシャフトを嵌合することができる。 In Embodiment 1 of the present invention, the relief groove 3a of the protruding portion is formed for each stacked core portion 3b, 3c formed by dividing the laminated core 3 in the axial direction. The ridge 2a is not crushed.
In FIG. 1, when the press-fitting of the thick core portion 3b is completed, the shaft is press-fitted into the thick core portion 3c. Since the protruding portion 2a of the shaft press-fitted into the stacked core portion 3c is fitted with the protruding portion 2a located in the escape groove 3a in the stacked core portion 3b, without reducing the fitting force, The stacked core portion 3c and the shaft can be fitted.
なお、積厚コア部３ｂ、３ｃのブロック毎の積厚（即ち軸方向長さあるいは間隔）は一定でなくても、本発明を適応することができる。即ち、積厚コア部３ｂ、３ｃの積厚を変更することで、嵌合力の調整も可能となる。
　また、積厚コア部３ｂ、３ｃ毎に突条部の逃げ溝３ａの数を調整することで、積厚コア部毎に嵌合力の設定ができる。 It should be noted that the present invention can be applied even if the stacked thickness (that is, the axial length or interval) of the stacked core portions 3b and 3c for each block is not constant. That is, the fitting force can be adjusted by changing the thickness of the stacked core portions 3b and 3c.
Moreover, the fitting force can be set for each thick core portion by adjusting the number of the relief grooves 3a of the protruding portion for each thick core portion 3b, 3c.
　以上のように、この発明の実施の形態１の回転電機の回転子によれば、以下のような優れた特徴、作用効果を奏するものである。 As described above, according to the rotor of the rotating electrical machine of Embodiment 1 of the present invention, the following excellent features and operational effects are exhibited.
　積層コア３に設けられた突条部の逃げ溝３ａにより、全ての突条部２ａが圧入部に嵌合しない構造となっている。所定の間隔、即ち、一定長さの積厚コア部毎、もしくは一定でない積厚コア部毎に、突条部の逃げ溝３ａが形成されているため、最初の積厚コア部３ｂの圧入部が終わると次の積厚コア部３ｃで、前の突条部とは異なる突条部が積厚コア３ｃとシャフトとの嵌合力を確保する。従って、どの積厚コア部でも常に十分なシャフトとの嵌合力を確保することが可能となる。 The protruding portion 2a provided in the laminated core 3 has a structure in which all the protruding portions 2a are not fitted into the press-fitting portions. Since the relief groove 3a of the protruding portion is formed at a predetermined interval, that is, for each stacked core portion having a certain length or for each non-constant stacked core portion, the press-fitting portion of the first stacked core portion 3b is formed. When the process is finished, in the next stacked core portion 3c, a protruding portion different from the previous protruding portion secures the fitting force between the stacked core 3c and the shaft. Accordingly, it is possible to always ensure a sufficient fitting force with the shaft in any stacked core portion.
　また、各積厚コア部３ｂ、３ｃは常に一定の嵌合力が確保されていることから、突条部つぶれと、圧入により生じた金属の塊による残留応力の影響を軽減できることから、圧入によるシャフト曲がり等を軽減できる。 In addition, since each of the thick core portions 3b and 3c always has a constant fitting force, it is possible to reduce the influence of the crushing of the protrusions and the residual stress due to the metal lump caused by the press-fitting, so that the shaft by press-fitting Bending can be reduced.
　シャフト２の外周面に複数形成されている突条部２ａが、等間隔、もしくは不等間隔、どちらの構造であっても対応することができる。積厚コア部に設けられた突条部の逃げ溝３ａの位置と突条部２ａの位置を合わせることで、積厚コア部とシャフトとの嵌合力の調整および嵌合力の確保ができる。 The protrusion 2a formed on the outer peripheral surface of the shaft 2 can cope with any structure of equal intervals or unequal intervals. By adjusting the position of the relief groove 3a of the protruding portion provided in the stacked core portion and the position of the protruding portion 2a, it is possible to adjust the fitting force between the stacked core portion and the shaft and to secure the fitting force.
　一定間隔（即ち、一定長さ）の積厚コア部３ｂ、３ｃに積層コア３を区分し、各積厚コア部３ｂ、３ｃ毎にシャフト突条部２ａの逃げ溝３ａを形成し、積厚コア部とシャフトとの必要嵌合力に応じて逃げ溝数を設定することで、各積厚コア部毎に嵌合力を設定することが可能となる。 The laminated core 3 is divided into stacked core portions 3b and 3c having a constant interval (that is, a fixed length), and a relief groove 3a of the shaft protrusion 2a is formed for each stacked core portion 3b and 3c. By setting the number of relief grooves according to the required fitting force between the core part and the shaft, the fitting force can be set for each stacked core part.
　また、一定間隔ではない積厚コア部に積層コア３を区分し、各積厚コア部毎にシャフト突条部の逃げ溝３ａを形成するようにして、積厚コア部の積厚を調整することで、各積厚コア部とシャフトとの嵌合力の調整が可能となる。 Further, the laminated core 3 is divided into stacked core portions that are not at regular intervals, and the clearance groove 3a of the shaft protrusion is formed for each stacked core portion, so that the stacked core portion is adjusted in thickness. Thus, it is possible to adjust the fitting force between each thick core portion and the shaft.
　また、積層コア３側に形成されたシャフトの突条部２ａの逃げ溝３ａは積層コア３の軽量化効果も有している。逃げ溝３ａを大きくすることで、積層コアの軽量化を図ることが可能である。 Moreover, the relief groove 3a of the protruding portion 2a of the shaft formed on the laminated core 3 side also has an effect of reducing the weight of the laminated core 3. It is possible to reduce the weight of the laminated core by enlarging the escape groove 3a.
　さらに、一般に電動機の回転子に使用される回転子の積層コアは、珪素鋼板や電機軟鋼板等の金属板をプレスで打ち抜いて積み重ね、かしめることにより形成されるが、積層コアに形成されている逃げ溝３ａがコアを積層する際の位置決め機能としても使用することができる効果がある。 Furthermore, a laminated core of a rotor generally used for a rotor of an electric motor is formed by punching and stacking and pressing a metal plate such as a silicon steel plate or an electric mild steel plate. There is an effect that the escape groove 3a can also be used as a positioning function when the cores are stacked.
　この発明は、電装用モータ等における電動機の、回転子の積層コアとシャフトとの嵌合構造に用いて好適なものである。 The present invention is suitable for use in a fitting structure of a laminated core of a rotor and a shaft of an electric motor in an electric motor or the like.
　　２：シャフト、２ａ：突条部、３：積層コア、３ａ：逃げ溝
　　３ｂ、３ｃ：積厚コア部。 2: shaft, 2a: protrusion, 3: laminated core, 3a: clearance groove 3b, 3c: stacked core.

Claims (4)

  1. 　積層コアの中央部に設けられた貫通孔に、シャフトが圧入されて構成される回転電機の回転子において、
    前記シャフトの外周面に、前記貫通孔の内壁と嵌合する軸方向に延びる突条部が形成されると共に、
    前記積層コアは、軸方向に所定の間隔の積厚コア部に区分され、区分された各積厚コア部毎の前記貫通孔の周方向内壁に、前記突条部と嵌合しない逃げ溝が形成されたことを特徴とする回転電機の回転子。     In a rotor of a rotating electrical machine configured by press-fitting a shaft into a through hole provided in the center of a laminated core,
    On the outer peripheral surface of the shaft is formed an axially extending ridge that fits with the inner wall of the through hole,
    The laminated core is divided into stacked core portions with a predetermined interval in the axial direction, and a clearance groove that does not fit with the protruding portion is formed on a circumferential inner wall of the through-hole for each of the divided stacked core portions. A rotor of a rotating electrical machine characterized by being formed.
  2. 　前記各積厚コア部毎に形成される逃げ溝の位置が、互いに他の積厚コア部の逃げ溝とは周方向において異なる位置に形成されたことを特徴とする請求項１に記載の回転電機の回転子。 2. The rotation according to claim 1, wherein the position of the relief groove formed for each stacked core portion is formed at a position different from the escape groove of another stacked core portion in the circumferential direction. Electric rotor.
  3. 　前記所定の間隔は一定の間隔であることを特徴とする請求項１または請求項２に記載の回転電機の回転子。 3. The rotor of a rotating electrical machine according to claim 1, wherein the predetermined interval is a constant interval.
  4. 　前記所定の間隔は不等間隔であることを特徴とする請求項１または請求項２に記載の回転電機の回転子。 3. The rotor of a rotating electrical machine according to claim 1, wherein the predetermined intervals are unequal intervals.
PCT/JP2011/073663 2011-10-14 2011-10-14 Rotator of rotating electric machine WO2013054438A1 (en)

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CN201180072048.8A CN103636102B (en) 2011-10-14 2011-10-14 The rotor of electric rotating machine

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JPH07298527A (en) * 1994-04-27 1995-11-10 Asmo Co Ltd Rotor structure for electric rotating machine with laminated core
JPH09294347A (en) * 1996-04-25 1997-11-11 Tokyo Parts Ind Co Ltd Laminated core for rotating electric machine
JP2000270505A (en) * 1999-03-17 2000-09-29 Seiko Epson Corp Rotor and stepping motor
JP2006129583A (en) * 2004-10-27 2006-05-18 Asmo Co Ltd Motor
JP2006217770A (en) * 2005-02-07 2006-08-17 Oriental Motor Co Ltd Fastening structure of rotor core to shaft of motor

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WO2020059423A1 (en) * 2018-09-21 2020-03-26 三菱電機株式会社 Rotary electric machine and manufacturing method for same
TWI715194B (en) * 2018-09-21 2021-01-01 日商三菱電機股份有限公司 Rotating electric machine and manufacturing method thereof
JPWO2020059423A1 (en) * 2018-09-21 2021-02-15 三菱電機株式会社 Rotating electric machine and its manufacturing method
JP7113906B2 (en) 2018-09-21 2022-08-05 三菱電機株式会社 Rotating electric machine

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