JP2003134705A - Structure of rotor of motor - Google Patents
Structure of rotor of motorInfo
- Publication number
- JP2003134705A JP2003134705A JP2001329268A JP2001329268A JP2003134705A JP 2003134705 A JP2003134705 A JP 2003134705A JP 2001329268 A JP2001329268 A JP 2001329268A JP 2001329268 A JP2001329268 A JP 2001329268A JP 2003134705 A JP2003134705 A JP 2003134705A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- end plate
- permanent magnet
- electric motor
- rotor core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、回転軸の外周側
に、回転軸とともに回転して永久磁石を備えた回転子鉄
心および、この回転子鉄心の軸方向両側を保持するエン
ドプレートをそれぞれ備えた電動機の回転子構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes, on the outer peripheral side of a rotary shaft, a rotor core that rotates with the rotary shaft and is provided with permanent magnets, and end plates that hold axially opposite sides of the rotor core. The present invention relates to a rotor structure of an electric motor.
【０００２】[0002]
【従来の技術】従来の電動機の回転子構造としては、図
６に示すようなものがある。この電動機の回転軸１の外
周側には、例えば板厚０．５ｍｍ程度の鉄などの磁性材
料からなる薄板を回転軸１の軸方向に沿って多数積層し
て構成した回転子鉄心３が固定されている。回転子鉄心
３には、軸方向に沿って貫通孔３ａが形成され、この貫
通孔３ａには、永久磁石５が挿入されている。そして、
回転子鉄心３の軸方向両側には、回転子鉄心３の多数の
薄板の剥離を防止するための板厚５ｍｍ程度のエンドプ
レート７が配置されている。2. Description of the Related Art A conventional rotor structure for an electric motor is shown in FIG. On the outer peripheral side of the rotary shaft 1 of the electric motor, a rotor core 3 is fixed, which is formed by laminating a large number of thin plates made of a magnetic material such as iron with a plate thickness of about 0.5 mm along the axial direction of the rotary shaft 1. Has been done. A through hole 3a is formed in the rotor core 3 along the axial direction, and a permanent magnet 5 is inserted into the through hole 3a. And
End plates 7 having a plate thickness of about 5 mm are arranged on both axial sides of the rotor core 3 to prevent the thin plates of the rotor core 3 from peeling off.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記したエ
ンドプレート７が鉄などの磁性材料である場合には、図
６のＡ部の拡大図である図７に破線で示すように、永久
磁石５の端末の磁束Ｍがエンドプレート７を介して短絡
し、回転子外周に設けられる図示しない固定子への磁束
が減少してしまう。このため、エンドプレート７は、通
常アルミニウムなどの非磁性材料で構成する必要が生
じ、材料費の高騰を招いている。By the way, when the above-mentioned end plate 7 is made of a magnetic material such as iron, as shown by a broken line in FIG. 7 which is an enlarged view of the portion A of FIG. The magnetic flux M at the end of 2 is short-circuited via the end plate 7, and the magnetic flux to the stator (not shown) provided on the outer circumference of the rotor is reduced. For this reason, the end plate 7 usually needs to be made of a non-magnetic material such as aluminum, which causes a rise in material cost.
【０００４】そこで、この発明は、永久磁石の端末から
発生する磁束の短絡を防止しつつ、エンドプレートを安
価な磁性材料で構成することを目的としている。Therefore, an object of the present invention is to prevent the magnetic flux generated from the end of the permanent magnet from being short-circuited and to make the end plate from an inexpensive magnetic material.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するため
に、請求項１の発明は、回転軸の外周側に、前記回転軸
の軸方向に沿って複数の磁性材料が積層して構成されて
前記回転軸とともに回転する回転子鉄心と、この回転子
鉄心の前記回転軸の軸方向両側に配置されて、前記回転
子鉄心を保持するエンドプレートとをそれぞれ設け、前
記回転子鉄心および前記エンドプレートに、前記回転軸
の軸方向に沿って永久磁石が挿入される貫通孔を設け、
前記永久磁石における前記回転軸の軸方向端面を、前記
エンドプレートにおける同軸方向外側面とほぼ同一面と
した構成としてある。In order to achieve the above object, the invention of claim 1 is formed by laminating a plurality of magnetic materials on the outer peripheral side of a rotary shaft along the axial direction of the rotary shaft. A rotor core that rotates together with the rotary shaft, and end plates that are arranged on both sides of the rotor core in the axial direction of the rotary shaft and that hold the rotor core, respectively. The plate is provided with a through hole in which a permanent magnet is inserted along the axial direction of the rotating shaft,
An axial end surface of the rotary shaft of the permanent magnet is substantially flush with a coaxial outer surface of the end plate.
【０００６】請求項２の発明は、請求項１の発明の構成
において、前記エンドプレートに、前記永久磁石におけ
る軸方向端面を押さえる保持部材を設けた構成としてあ
る。According to a second aspect of the invention, in the configuration of the first aspect of the invention, the end plate is provided with a holding member for holding the axial end face of the permanent magnet.
【０００７】請求項３の発明は、請求項２の発明の構成
において、前記保持部材は、前記永久磁石の軸方向端面
を押さえる保持爪であり、前記エンドプレートと一体に
形成される構成としてある。According to a third aspect of the present invention, in the structure of the second aspect, the holding member is a holding claw that holds down the axial end surface of the permanent magnet, and is formed integrally with the end plate. .
【０００８】請求項４の発明は、請求項３の発明の構成
において、前記保持爪は、前記貫通孔の回転子外周側か
ら同内周側へ向けて突出する構成としてある。According to a fourth aspect of the invention, in the configuration of the third aspect of the invention, the holding claws project from the outer peripheral side of the through hole toward the inner peripheral side of the rotor.
【０００９】請求項５の発明は、請求項２の発明の構成
において、前記保持部材は、前記永久磁石の軸方向端面
を押さえる端面押さえ部と、前記エンドプレートの前記
回転子鉄心側の内面に係止される係止部と、この係止部
と前記端面押さえ部とを連結して前記貫通孔に挿入され
る連結部とをそれぞれ備え、前記エンドプレートと別体
に形成される構成としてある。According to a fifth aspect of the present invention, in the structure of the second aspect, the holding member has an end face holding portion for holding an axial end face of the permanent magnet and an inner surface of the end plate on the rotor core side. The structure includes a locking portion to be locked and a connecting portion that connects the locking portion and the end surface pressing portion and is inserted into the through hole, and is formed separately from the end plate. .
【００１０】請求項６の発明は、請求項５の発明の構成
において、前記係止部は、前記貫通孔の回転子外周側部
分と同内周側部分とから構成されるものとしてある。According to a sixth aspect of the present invention, in the structure of the fifth aspect, the locking portion is composed of a rotor outer peripheral side portion and an inner peripheral side portion of the through hole.
【００１１】請求項７の発明は、請求項５または６の発
明の構成において、前記エンドプレートの前記係止部が
係止される部位に、前記係止部が入り込んでこの係止部
の板厚以上の深さ寸法を備えた凹部を設けた構成として
ある。According to a seventh aspect of the present invention, in the structure of the fifth or sixth aspect of the invention, the locking portion is inserted into a portion of the end plate where the locking portion is locked, and a plate of the locking portion is formed. The configuration is such that a concave portion having a depth dimension equal to or larger than the thickness is provided.
【００１２】[0012]
【発明の効果】請求項１の発明によれば、永久磁石にお
ける回転軸の軸方向端面を、エンドプレートの同軸方向
外側面とほぼ同一面としたので、エンドプレートを磁性
材料としても、永久磁石の端末付近から発生する磁束
は、エンドプレートを通って回転子外周の固定子側へ向
かうことになり、磁束の短絡を防止することができる。
磁束の短絡を防止しつつ、エンドプレートを磁性材料で
構成できるので、材料費の高騰を防止することができ
る。According to the first aspect of the present invention, the axial end surface of the rotary shaft of the permanent magnet is made substantially flush with the outer surface of the end plate in the coaxial direction. Therefore, even if the end plate is made of a magnetic material, the permanent magnet is used. The magnetic flux generated from the vicinity of the terminal goes to the stator side on the outer circumference of the rotor through the end plate, so that the short circuit of the magnetic flux can be prevented.
Since the end plate can be made of a magnetic material while preventing a short circuit of the magnetic flux, it is possible to prevent the material cost from rising.
【００１３】請求項２の発明によれば、回転子鉄心およ
びエンドプレートの貫通孔に挿入した永久磁石は、保持
部材により貫通孔からの抜けを防止することができる。According to the second aspect of the present invention, the permanent magnets inserted into the through holes of the rotor core and the end plates can be prevented from coming off from the through holes by the holding member.
【００１４】請求項３の発明によれば、保持部材をエン
ドプレートと一体とすることで、部品点数の増加を招く
ことなく、永久磁石の貫通孔からの抜けを防止すること
ができる。According to the third aspect of the present invention, by integrally forming the holding member with the end plate, the permanent magnet can be prevented from coming off from the through hole without increasing the number of parts.
【００１５】請求項４の発明によれば、貫通孔の回転子
外周側から同内周側へ向けて突出している保持爪によ
り、貫通孔からの永久磁石の抜けを防止することができ
る。According to the invention of claim 4, the holding claws projecting from the outer peripheral side of the through hole toward the inner peripheral side of the rotor can prevent the permanent magnet from coming off from the through hole.
【００１６】請求項５の発明によれば、保持部材をエン
ドプレートと別体に設けたので、エンドプレートには特
別な加工を必要とせず、安価な構成によって永久磁石の
貫通孔からの抜けを防止することができる。According to the invention of claim 5, since the holding member is provided separately from the end plate, no special processing is required for the end plate, and the permanent magnet is removed from the through hole with an inexpensive structure. Can be prevented.
【００１７】請求項６の発明によれば、保持部材は、貫
通孔の回転子外周側部分と同内周側部分とにそれぞれ設
けられた係止部により、エンドプレートに係止され、こ
の状態で永久磁石を確実に保持することができる。According to the sixth aspect of the present invention, the holding member is locked to the end plate by the locking portions provided on the rotor outer peripheral side portion and the rotor inner peripheral side portion of the through hole, respectively. Thus, the permanent magnet can be securely held.
【００１８】請求項７の発明によれば、保持部材の係止
部が、エンドプレートの凹部に入り込むので、エンドプ
レートは、内側面が回転子鉄心に確実に当接し、回転子
鉄心の保持を確実に行うことができる。According to the invention of claim 7, since the engaging portion of the holding member is inserted into the concave portion of the end plate, the inner surface of the end plate is surely brought into contact with the rotor core, thereby holding the rotor core. It can be done reliably.
【００１９】請求項８の発明によれば、エンドプレート
と別体とした保持部材を、非磁性材料で構成したので、
永久磁石の端末付近から発生する磁束が保持部材を通る
ことによる短絡を防止することができる。According to the invention of claim 8, since the holding member which is separate from the end plate is made of a non-magnetic material,
It is possible to prevent a short circuit due to the magnetic flux generated near the end of the permanent magnet passing through the holding member.
【００２０】[0020]
【発明の実施の形態】以下、この発明の実施の形態を図
面に基づき説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００２１】図１は、この発明の第１の実施形態を示す
電動機の回転子構造を示す断面図であり、図２は、図１
のＢ矢視図である。電動機の回転軸９は、図示しない電
動機ハウジングに対しベアリングを介して回転可能に支
持されている。FIG. 1 is a sectional view showing a rotor structure of an electric motor showing a first embodiment of the present invention, and FIG. 2 is shown in FIG.
FIG. The rotating shaft 9 of the electric motor is rotatably supported by a motor housing (not shown) via a bearing.
【００２２】回転軸９の外周側に固定される回転子鉄心
１１は、従来のものと同様に、例えば板厚０．５ｍｍ程
度の鉄などの磁性材料からなる薄板を回転軸９の軸方向
（以後、軸方向とは回転軸９の軸方向とする。）に沿っ
て積層して構成したもので、回転軸９が挿入される回転
軸挿入孔１１ａを備えている。The rotor iron core 11 fixed to the outer peripheral side of the rotary shaft 9 is a thin plate made of a magnetic material such as iron having a plate thickness of about 0.5 mm in the axial direction of the rotary shaft 9 ( Hereinafter, the axial direction will be referred to as the axial direction of the rotary shaft 9.), and the rotary shaft 9 is provided with a rotary shaft insertion hole 11a into which the rotary shaft 9 is inserted.
【００２３】回転子鉄心１１の軸方向両端面は、磁性材
料で構成したエンドプレート１３によって挟持固定され
ている。エンドプレート１３は、回転子鉄心１１と同様
に、回転軸９が挿入される回転軸挿入孔１３ａを備えて
回転軸９の外周に固定される。Both end surfaces of the rotor core 11 in the axial direction are clamped and fixed by end plates 13 made of a magnetic material. Like the rotor core 11, the end plate 13 has a rotary shaft insertion hole 13a into which the rotary shaft 9 is inserted and is fixed to the outer periphery of the rotary shaft 9.
【００２４】回転子鉄心１１には、その外周側近傍内
に、軸方向に沿って貫通孔１１ｂが形成されている。こ
の貫通孔１１ｂに対応して左右のエンドプレート１３に
は、貫通孔１３ｂが形成されている。この貫通孔１１ｂ
および１３ｂに永久磁石１７が挿入されている。貫通孔
１１ｂ，１３ｂおよび永久磁石１７は、円周方向に複数
設けられている。A through hole 11b is formed in the rotor core 11 in the vicinity of the outer peripheral side thereof along the axial direction. Through holes 13b are formed in the left and right end plates 13 corresponding to the through holes 11b. This through hole 11b
Permanent magnets 17 are inserted in and 13b. A plurality of through holes 11b and 13b and permanent magnets 17 are provided in the circumferential direction.
【００２５】上記した永久磁石１７の軸方向長さ寸法
は、回転子鉄心１１の軸方向長さと２枚のエンドプレー
ト１３の板厚分とを加えた寸法とほぼ同等となってい
る、つまり、永久磁石１７の軸方向端面１７ａは、エン
ドプレート１３の外側面１３ｃとほぼ同一面を構成して
いる。The axial length of the permanent magnet 17 is approximately equal to the axial length of the rotor core 11 plus the thickness of the two end plates 13, that is, The axial end surface 17a of the permanent magnet 17 is substantially flush with the outer surface 13c of the end plate 13.
【００２６】上記したエンドプレート１３の外側面１３
ｃには、永久磁石１７の軸方向端面１７ａを押さえる保
持部材としての保持爪１３ｄが、エンドプレート１３に
一体に形成されている。この保持爪１３ｄは、貫通孔１
３ｂの回転子外周側から同内周側へ向けて突出するもの
で、図２に示したように、円周方向に長く形成された永
久磁石１７の長手方向ほぼ中心で、かつ外側（図２中で
上部側）の一部を押さえている。The outer surface 13 of the end plate 13 described above
In c, a holding claw 13d as a holding member that presses the axial end surface 17a of the permanent magnet 17 is integrally formed with the end plate 13. This holding claw 13d has a through hole 1
As shown in FIG. 2, the permanent magnet 17 is formed so as to project from the outer peripheral side of the rotor 3b toward the inner peripheral side thereof. It holds down a part of the upper part).
【００２７】上記した電動機の回転子構造において、永
久磁石１７のエンドプレート１３付近の端末から発生す
る磁束が、前記図７に示した従来のように短絡するため
には、透磁率の低い空気層を通過しなければならない。
ところが、磁束は透磁率のより高い部位を通過する特性
を備えているため、前記端末から発生する磁束は、透磁
率の高い磁性材料によって構成されたエンドプレート１
３を通り、回転子外周に設けられた図示しない固定子方
向へ向かうことになり、前記した磁束の短絡の発生は防
止される。In the above rotor structure of the electric motor, in order for the magnetic flux generated from the terminal near the end plate 13 of the permanent magnet 17 to be short-circuited as in the prior art shown in FIG. 7, the air layer having a low magnetic permeability is used. Have to go through.
However, since the magnetic flux has a characteristic of passing through a portion having a higher magnetic permeability, the magnetic flux generated from the terminal has an end plate 1 made of a magnetic material having a high magnetic permeability.
It goes through 3 to the direction of a stator (not shown) provided on the outer circumference of the rotor, and the occurrence of the above-mentioned short circuit of the magnetic flux is prevented.
【００２８】このように、通常、材料費の高い非磁性材
料で構成されるエンドプレートを、材料費の低い鉄など
の磁性材料で構成しても、永久磁石１７の端末付近から
の磁束の短絡を防止できるので、回転子の製造コストを
低減することができる。また、この場合、保持爪１３ｄ
により永久磁石１７の軸方向端面１７ａを押さえている
ので、永久磁石１７の貫通孔１１ｂおよび１３ｂからの
抜けを防止することができる。また保持爪１３ｄは、エ
ンドプレート１３と一体に構成されているので、上記し
た永久磁石１７の貫通孔１１ｂおよび１３ｂからの抜け
を防止する構成とする際に、部品点数の増加を回避する
ことができる。As described above, even if the end plate, which is normally made of a non-magnetic material having a high material cost, is made of a magnetic material such as iron, which has a low material cost, the magnetic flux from the vicinity of the end of the permanent magnet 17 is short-circuited. Since this can be prevented, the manufacturing cost of the rotor can be reduced. In this case, the holding claw 13d
Thus, the axial end surface 17a of the permanent magnet 17 is pressed, so that the permanent magnet 17 can be prevented from coming off from the through holes 11b and 13b. Further, since the holding claw 13d is formed integrally with the end plate 13, it is possible to avoid an increase in the number of parts when the above-mentioned structure is configured to prevent the permanent magnet 17 from coming off from the through holes 11b and 13b. it can.
【００２９】ところで、電動機作動時における回転子の
発生する回転トルクは、回転子から回転子外周に設けら
れた図示しない固定子方向へ向かう磁束である鎖交磁束
の量によって左右される。したがって、上記した実施形
態の回転子における鎖交磁束が発生する範囲は、図１に
示すように、永久磁石１７の全長に対応する磁気回路範
囲Ｌ1となる。一方、前記図６に示した従来の回転子に
おける鎖交磁束の範囲は、磁気回路範囲Ｌとなる。By the way, the rotational torque generated by the rotor during operation of the electric motor depends on the amount of the interlinking magnetic flux which is the magnetic flux traveling from the rotor toward the stator (not shown) provided on the outer periphery of the rotor. Therefore, the range in which the interlinkage magnetic flux is generated in the rotor of the above-described embodiment is the magnetic circuit range L 1 corresponding to the entire length of the permanent magnet 17, as shown in FIG. 1. On the other hand, the range of the interlinkage magnetic flux in the conventional rotor shown in FIG. 6 is the magnetic circuit range L.
【００３０】ここで、磁気回路範囲Ｌ1を従来の磁気回
路範囲Ｌと等しくした場合、上記した本発明の実施形態
の回転子においては、従来の回転子とほぼ同等の回転ト
ルク性能を確保しながら、エンドプレートの板厚分小型
化できるという効果も得られる。Here, when the magnetic circuit range L 1 is made equal to the conventional magnetic circuit range L, the rotor according to the above-described embodiment of the present invention ensures substantially the same rotational torque performance as the conventional rotor. However, there is an effect that the end plate can be downsized by the plate thickness.
【００３１】図３は、この発明の第２の実施形態を示す
電動機の回転子構造を示す断面図であり、図４は図３の
側面図である。この実施形態は、永久磁石１７の軸方向
端面１７ａを押さえる保持部材としての磁石保持具１９
を、エンドプレート１３０と別体に構成している。各エ
ンドプレート１３０の中心には、回転軸９が挿入される
回転軸挿入孔１３０ａが形成されている。FIG. 3 is a sectional view showing a rotor structure of an electric motor showing a second embodiment of the present invention, and FIG. 4 is a side view of FIG. In this embodiment, a magnet holder 19 as a holding member that holds down the axial end surface 17a of the permanent magnet 17 is provided.
Is configured separately from the end plate 130. At the center of each end plate 130, a rotary shaft insertion hole 130a into which the rotary shaft 9 is inserted is formed.
【００３２】この例においても、図１のものと同様に、
永久磁石１７の軸方向長さ寸法は、回転子鉄心１１の軸
方向長さと２枚のエンドプレート１３０の板厚分とを加
えた寸法とほぼ同等となっている、つまり、永久磁石１
７の軸方向端面１７ａは、エンドプレート１３０の外側
面１３０ｂとほぼ同一面を構成している。Also in this example, as in the case of FIG.
The axial length dimension of the permanent magnet 17 is almost equal to the axial length of the rotor core 11 plus the thickness of the two end plates 130, that is, the permanent magnet 1
The axial end surface 17 a of No. 7 is substantially flush with the outer surface 130 b of the end plate 130.
【００３３】磁石保持具１９は、図５に拡大して示すよ
うに、永久磁石１７の軸方向端面１７ａを押さえる端面
押さえ部１９ａと、エンドプレート１３０の内側面（図
５中で左側面）における回転子外周側および同内周側に
それぞれ形成してある凹部１３０ｃおよび１３０ｄに入
り込む係止部１９ｂおよび１９ｃと、端面押さえ部１９
ａと係止部１９ｂ，１９ｃとを連結し、エンドプレート
１３０の貫通孔１３０ｅに挿入される連結部としての側
面部１９ｄ，１９ｅとを備えている。As shown in the enlarged view of FIG. 5, the magnet holder 19 has an end face pressing portion 19a for pressing the axial end face 17a of the permanent magnet 17 and an inner side surface (left side surface in FIG. 5) of the end plate 130. Locking portions 19b and 19c that enter the recesses 130c and 130d that are formed on the outer peripheral side and the inner peripheral side of the rotor, respectively, and the end surface pressing portion 19
The side portions 19d and 19e are provided as a connecting portion that connects the a and the locking portions 19b and 19c and is inserted into the through hole 130e of the end plate 130.
【００３４】上記したエンドプレート１３０の凹部１３
０ｃ，１３０ｄは、係止部１９ｂ，１９ｃの板厚以上の
深さに形成されているが、係止部１９ｂ，１９ｃと回転
子鉄心１１との間に隙間Ｓが形成されることが望まし
い。この凹部１３０ｃ，１３０ｄは、エンドプレート１
３０をプレスなどで製造した後、切削などによって容易
に形成できる。また、エンドプレート１３０の貫通孔１
３０ｅは、図１に示した第１の実施形態の貫通孔１３ｂ
に比べ、磁石保持具１９の側面部１９ｄ，１９ｅの板厚
分大きく形成されている。The recess 13 of the end plate 130 described above
0c and 130d are formed to a depth equal to or greater than the plate thickness of the locking portions 19b and 19c, but it is desirable that a gap S be formed between the locking portions 19b and 19c and the rotor core 11. The recesses 130c and 130d are formed in the end plate 1
After the 30 is manufactured by a press or the like, it can be easily formed by cutting or the like. Further, the through hole 1 of the end plate 130
30e is the through hole 13b of the first embodiment shown in FIG.
In comparison with the above, the side faces 19d and 19e of the magnet holder 19 are formed larger by the plate thickness.
【００３５】なお、上記した磁石保持具１９は、永久磁
石１７の端末付近からの磁束の短絡を防止するために、
アルミニウムや樹脂などの非磁性材料で構成することが
望ましい。The magnet holder 19 described above is designed to prevent short circuit of magnetic flux from the vicinity of the end of the permanent magnet 17.
It is desirable to use a non-magnetic material such as aluminum or resin.
【００３６】上記した第２の実施形態における電動機の
回転子構造では、回転軸９に回転子鉄心１１を取り付け
た後、回転子鉄心１１の貫通孔１１ｂに永久磁石１７を
挿入する。このとき、永久磁石１７の両端末を回転子鉄
心１１の両端面から突出させた状態とする。この状態
で、永久磁石１７の両端末に磁石保持具１９を被せるよ
うにして取り付けた後、エンドプレート１３０を回転子
鉄心１１を挟持するように、回転軸９に固定することで
組み立てる。In the rotor structure of the electric motor according to the second embodiment described above, after the rotor core 11 is attached to the rotary shaft 9, the permanent magnet 17 is inserted into the through hole 11b of the rotor core 11. At this time, both ends of the permanent magnet 17 are made to project from both end surfaces of the rotor core 11. In this state, the magnet holders 19 are attached to both ends of the permanent magnet 17 so as to cover them, and then the end plate 130 is fixed to the rotating shaft 9 so as to sandwich the rotor iron core 11 for assembly.
【００３７】そして、この回転子構造においても、前記
図１のものと同様に、永久磁石１７の軸方向端面１７ａ
が、エンドプレート１３０の外側面１３０ｂとほぼ同一
面を構成しているので、永久磁石１７の端末から発生す
る磁束は、透磁率の高い磁性材料によって構成されたエ
ンドプレート１３０を通り、回転子外周に設けられた図
示しない固定子方向へ向かうことになり、磁束の短絡は
防止される。Also in this rotor structure, the axial end surface 17a of the permanent magnet 17 is the same as that shown in FIG.
However, the magnetic flux generated from the end of the permanent magnet 17 passes through the end plate 130 made of a magnetic material having a high magnetic permeability, and the outer circumference 130 b of the end plate 130. Thus, the magnetic flux is short-circuited to the stator (not shown).
【００３８】このため、通常、材料費の高い非磁性材料
で構成されるエンドプレートを、材料費の低い鉄などの
磁性材料で構成しても、永久磁石１７の端末付近からの
磁束の短絡を防止できるので、回転子の製造コストを低
減することができる。また、磁石保持具１９により、永
久磁石１７の軸方向端面１７ａを押さえているので、永
久磁石１７の貫通孔１１ｂ，１３０ｅからの抜けを防止
することができる。Therefore, even if the end plate, which is usually made of a non-magnetic material having a high material cost, is made of a magnetic material such as iron, which has a low material cost, the short circuit of the magnetic flux from the vicinity of the end of the permanent magnet 17 is prevented. Since this can be prevented, the manufacturing cost of the rotor can be reduced. Further, since the magnet holder 19 presses the axial end surface 17a of the permanent magnet 17, it is possible to prevent the permanent magnet 17 from coming off from the through holes 11b and 130e.
【００３９】また、磁石保持具１９の係止部１９ｂ，１
９ｃが、エンドプレート１３０の凹部１３０ｃ，１３０
ｄに入り込んだ状態となるので、エンドプレート１３０
は、内側面が回転子鉄心１１に確実に当接し、薄板を多
数積層した回転子鉄心１１の剥離を防止でき、回転子鉄
心１１の保持を確実に行うことができる。The locking portions 19b, 1 of the magnet holder 19 are also provided.
9c indicates the recesses 130c and 130 of the end plate 130.
Since it enters the state d, the end plate 130
The inner side surface reliably contacts the rotor core 11, the rotor core 11 having a large number of thin plates stacked thereon can be prevented from peeling off, and the rotor core 11 can be reliably held.
【００４０】さらに、上記した第２の実施形態において
は、エンドプレート１３０は、プレスなどで製造した
後、特別な加工を必要とすることなく、凹部１３０ｃ，
１３０ｄを切削などによって容易に形成できるので、図
１の係止部１３ｄをエンドプレート１３に一体化させる
場合に比べ、製造が容易となる。Further, in the above-described second embodiment, the end plate 130 is manufactured by a press or the like, and thereafter, the concave portions 130c,
Since 130d can be easily formed by cutting or the like, manufacturing is easier than in the case where the locking portion 13d of FIG. 1 is integrated with the end plate 13.
【００４１】また、この第２の実施形態の回転子におい
ても、第１の実施形態と同様に、磁気回路範囲Ｌ1を従
来の磁気回路範囲Ｌと等しくした場合、従来の回転子と
ほぼ同等の回転トルク性能を確保しながら、エンドプレ
ートの板厚分小型化できるという効果が得られる。Also in the rotor of the second embodiment, when the magnetic circuit range L 1 is equal to the conventional magnetic circuit range L as in the first embodiment, the rotor is substantially the same as the conventional rotor. It is possible to obtain the effect that the end plate can be downsized by the thickness of the end plate while ensuring the rotation torque performance of
【図１】この発明の第１の実施形態を示す電動機の回転
子構造を示す断面図である。FIG. 1 is a sectional view showing a rotor structure of an electric motor according to a first embodiment of the present invention.
【図２】図１のＢ矢視図である。FIG. 2 is a view on arrow B of FIG.
【図３】この発明の第２の実施形態を示す電動機の回転
子構造を示す断面図である。FIG. 3 is a sectional view showing a rotor structure of an electric motor according to a second embodiment of the present invention.
【図４】図３の側面図である。FIG. 4 is a side view of FIG.
【図５】図３の要部の拡大された断面図である。5 is an enlarged cross-sectional view of a main part of FIG.
【図６】従来例を示す電動機の回転子構造を示す断面図
である。FIG. 6 is a sectional view showing a rotor structure of an electric motor showing a conventional example.
【図７】図６のＡ部における磁束の短絡状態を示す説明
図である。FIG. 7 is an explanatory diagram showing a short-circuit state of magnetic flux in the A portion of FIG.
９ 回転軸 １１ 回転子鉄心 １３，１３０ エンドプレート １１ｂ 貫通孔 １３ｂ，１３０ｅ 貫通孔 １３ｃ，１３０ｂ 軸方向外側面 １３ｄ 保持爪（保持部材） １７ 永久磁石 １７ａ 軸方向端面 １９ 磁石保持具（保持部材） １９ａ 端面押さえ部 １９ｂ，１９ｃ 係止部 １９ｄ，１９ｅ 側面部（連結部） １３０ｃ，１３０ｄ 凹部 9 rotation axis 11 rotor core 13,130 End plate 11b through hole 13b, 130e through hole 13c, 130b Axial outer side surface 13d Holding claw (holding member) 17 permanent magnet 17a Axial end face 19 Magnet holder (holding member) 19a End face pressing part 19b, 19c Locking part 19d, 19e Side part (connecting part) 130c, 130d recess
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H002 AA00 AA02 AA08 AA09 AB00 AC00 AC08 5H621 AA00 HH01 5H622 AA03 CA02 PP03 PP09 PP18 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 5H002 AA00 AA02 AA08 AA09 AB00 AC00 AC08 5H621 AA00 HH01 5H622 AA03 CA02 PP03 PP09 PP18
Claims (8)
に沿って複数の磁性材料が積層して構成されて前記回転
軸とともに回転する回転子鉄心と、この回転子鉄心の前
記回転軸の軸方向両側に配置されて、前記回転子鉄心を
保持するエンドプレートとをそれぞれ設け、前記回転子
鉄心および前記エンドプレートに、前記回転軸の軸方向
に沿って永久磁石が挿入される貫通孔を設け、前記永久
磁石における前記回転軸の軸方向端面を、前記エンドプ
レートにおける同軸方向外側面とほぼ同一面としたこと
を特徴とする電動機の回転子構造。1. A rotor core that is formed by laminating a plurality of magnetic materials along the axial direction of the rotary shaft on the outer peripheral side of the rotary shaft and rotates together with the rotary shaft, and the rotation of the rotor core. End plates that are arranged on both sides of the shaft in the axial direction and that respectively hold the rotor core are provided, and a permanent magnet is inserted into the rotor core and the end plate along the axial direction of the rotation shaft. A rotor structure for an electric motor, wherein a hole is provided, and an axial end surface of the rotary shaft of the permanent magnet is substantially flush with a coaxial outer surface of the end plate.
おける軸方向端面を押さえる保持部材を設けたことを特
徴とする請求項１記載の電動機の回転子構造。2. The rotor structure for an electric motor according to claim 1, wherein the end plate is provided with a holding member that holds down an axial end surface of the permanent magnet.
端面を押さえる保持爪であり、前記エンドプレートと一
体に形成されていることを特徴とする請求項２記載の電
動機の回転子構造。3. The rotor structure for an electric motor according to claim 2, wherein the holding member is a holding claw that holds down an axial end surface of the permanent magnet, and is formed integrally with the end plate.
側から同内周側へ向けて突出していることを特徴とする
請求項３記載の電動機の回転子構造。4. The rotor structure for an electric motor according to claim 3, wherein the holding claw projects from the outer peripheral side of the through hole toward the inner peripheral side of the rotor.
端面を押さえる端面押さえ部と、前記エンドプレートの
前記回転子鉄心側の内面に係止される係止部と、この係
止部と前記端面押さえ部とを連結して前記貫通孔に挿入
される連結部とをそれぞれ備え、前記エンドプレートと
別体に形成されていることを特徴とする請求項２記載の
電動機の回転子構造。5. The holding member includes an end face pressing portion that presses an axial end surface of the permanent magnet, a locking portion that is locked to an inner surface of the end plate on the rotor core side, and the locking portion. The rotor structure for an electric motor according to claim 2, further comprising a connecting portion that connects the end surface pressing portion and is inserted into the through hole, and is formed separately from the end plate.
側部分と同内周側部分とから構成されていることを特徴
とする請求項５記載の電動機の回転子構造。6. The rotor structure for an electric motor according to claim 5, wherein the engaging portion is composed of a rotor outer peripheral side portion and a rotor inner peripheral side portion of the through hole.
される部位に、前記係止部が入り込んでこの係止部の板
厚以上の深さ寸法を備えた凹部を設けたことを特徴とす
る請求項５または６記載の電動機の回転子構造。7. A recess having a depth dimension equal to or greater than the plate thickness of the locking portion is provided at a portion of the end plate where the locking portion is locked, the locking portion being inserted. The rotor structure for an electric motor according to claim 5 or 6.
ていることを特徴とする請求項５ないし７のいずれかに
記載の電動機の回転子構造。8. The rotor structure for an electric motor according to claim 5, wherein the holding member is made of a non-magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001329268A JP3753046B2 (en) | 2001-10-26 | 2001-10-26 | Rotor structure of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001329268A JP3753046B2 (en) | 2001-10-26 | 2001-10-26 | Rotor structure of electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003134705A true JP2003134705A (en) | 2003-05-09 |
| JP3753046B2 JP3753046B2 (en) | 2006-03-08 |
Family
ID=19145196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001329268A Expired - Fee Related JP3753046B2 (en) | 2001-10-26 | 2001-10-26 | Rotor structure of electric motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3753046B2 (en) |
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| US10069357B2 (en) | 2012-11-30 | 2018-09-04 | Arcelik Anonim Sirketi | Spoke permanent magnet rotor |
| JP2014212582A (en) * | 2013-04-17 | 2014-11-13 | 三菱電機株式会社 | Dynamo-electric machine |
| CN107615620A (en) * | 2015-07-21 | 2018-01-19 | Ｋｙｂ株式会社 | Rotor, electric rotating machine, method for manufacturing rotor and rotor manufacture device |
| RU2680837C1 (en) * | 2017-01-11 | 2019-02-28 | Тойота Дзидося Кабусики Кайся | Rotating electric machine rotor |
| WO2018131402A1 (en) * | 2017-01-11 | 2018-07-19 | パナソニックＩｐマネジメント株式会社 | Permanent magnet embedded rotor and electric motor equipped with same |
| CN110168862A (en) * | 2017-01-11 | 2019-08-23 | 松下知识产权经营株式会社 | Permanent magnet embedded rotor and the motor for having the rotor |
| CN111164867A (en) * | 2017-09-24 | 2020-05-15 | 詹尼斯机器人移动技术加拿大公司 | Radial multi-piece rotor for an electric machine |
| US11527931B2 (en) | 2017-09-24 | 2022-12-13 | Genesis Robotics And Motion Technologies Canada, Ulc | Radial multi piece rotor for electric machine |
| US11791682B2 (en) | 2017-09-24 | 2023-10-17 | Genesis Motion Solutions Ulc | Radial multi piece rotor for electric machine |
| CN109873510A (en) * | 2017-12-02 | 2019-06-11 | 现代自动车株式会社 | Motor |
| DE102019220509A1 (en) * | 2019-12-23 | 2021-06-24 | Robert Bosch Gmbh | Disk pack of a rotor for an electrical machine |
| CN113809894A (en) * | 2021-09-23 | 2021-12-17 | 河北新四达电机股份有限公司 | Double-stator permanent magnet synchronous motor assembly process |
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| JP3753046B2 (en) | 2006-03-08 |
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