JP3306645B2 - Stator core - Google Patents
Stator coreInfo
- Publication number
- JP3306645B2 JP3306645B2 JP03517196A JP3517196A JP3306645B2 JP 3306645 B2 JP3306645 B2 JP 3306645B2 JP 03517196 A JP03517196 A JP 03517196A JP 3517196 A JP3517196 A JP 3517196A JP 3306645 B2 JP3306645 B2 JP 3306645B2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- straight
- projection
- yoke
- stator 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.)
- Expired - Fee Related
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電動モータ等の回
転電機に用いられるステータコアに関する。The present invention relates to a stator core used for a rotating electric machine such as an electric motor.
【０００２】[0002]
【従来の技術】従来、特開昭61-124241号公報に見られ
るように、周方向に分割された各分割コアのヨーク部の
周方向一端と他端とに夫々突起と凹溝とを形成し、複数
の分割コアを、隣接する一方の分割コアの突起を他方の
分割コアの凹溝に嵌合させることにより、周方向に連結
して組立てたステータコアは知られている。そして、こ
のものでは、凹溝をあり溝で形成し、あり形に形成した
突起をステータコアの軸方向から凹溝に嵌合している。2. Description of the Related Art Conventionally, as shown in JP-A-61-124241, a projection and a concave groove are formed at one end and the other end in the circumferential direction of a yoke portion of each divided core divided in a circumferential direction. A stator core is known in which a plurality of split cores are circumferentially connected and assembled by fitting projections of one adjacent split core into concave grooves of the other split core. In this case, the concave groove is formed by a dovetail groove, and the protrusion formed in the dovetail shape is fitted into the concave groove from the axial direction of the stator core.
【０００３】[0003]
【発明が解決しようとする課題】ステータコアは軸長が
比較的長いため、突起を凹溝に軸方向から嵌合する上記
従来例のものでは圧入ストロークが長くなり、圧入負荷
が過大にならないよう、突起と凹溝との間の締め代を小
さくせざるを得ず、その結果、分割コア間のガタを生じ
易くなる。本発明は、かかる不具合を解消したステータ
コアを提供することを課題としている。Since the stator core has a relatively long shaft length, the above-mentioned prior art in which the projection is fitted into the concave groove from the axial direction has a long press-fit stroke and prevents the press-fit load from becoming excessive. The interference between the projection and the groove must be reduced, and as a result, play between split cores is likely to occur. An object of the present invention is to provide a stator core that has solved such a problem.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決すべく、
本発明は、周方向に分割された各分割コアのヨーク部の
周方向一端と他端とに夫々突起と凹溝とを形成し、複数
の分割コアを、隣接する一方の分割コアの突起を他方の
分割コアの凹溝に嵌合させることにより、周方向に連結
して組立てられるステータコアにおいて、突起と凹溝と
の中間部分に、ヨーク部の各端面の法線方向に一定幅で
真直に延在するストレート部を形成し、突起の先端部と
凹溝の内底部とをストレート部の幅と同一の直径の半円
状に形成すると共に、突起と凹溝のヨーク部の各端面寄
りの部分に、ストレート部に隣接する、ストレート部よ
り幅狭の縊れ部と、縊れ部からヨーク部の各端面に向か
って拡幅する拡幅部とを形成し、突起を前記法線方向か
ら凹溝に圧入する際に、凹溝の外径側と内径側の溝壁の
弾性域内での撓みにより凹溝の縊れ部が突起のストレー
ト部の通過を許容するように拡幅され、突起のストレー
ト部が凹溝の縊れ部を通過したとき、凹溝のストレート
部と縊れ部とが夫々突起のストレート部と縊れ部とに圧
接するようにした、ことを特徴とする。Means for Solving the Problems In order to solve the above problems,
In the present invention, a projection and a concave groove are formed at one end and the other end in the circumferential direction of the yoke portion of each divided core divided in the circumferential direction, respectively. By fitting the groove into the groove of the other split core, in the stator core that is connected and assembled in the circumferential direction, in the middle part between the protrusion and the groove, it is straight with a constant width in the normal direction of each end face of the yoke part. An extending straight portion is formed, and the tip of the protrusion and the inner bottom of the concave groove are formed in a semicircular shape having the same diameter as the width of the straight portion. A narrow portion narrower than the straight portion, and a wide portion extending from the narrow portion toward each end surface of the yoke portion. Deflection within the elastic range of the groove walls on the outer and inner diameter sides of the concave groove when press-fitting The narrowed portion of the groove is wider so as to allow the straight portion of the projection to pass, and when the straight portion of the projection passes through the narrowed portion of the groove, the straight portion and the narrowed portion of the groove are respectively The straight portion and the narrow portion of the projection are pressed against each other.
【０００５】本発明によれば、周方向に隣接する一方の
分割コアの突起を他方の分割コアの凹溝にヨーク部の端
面の法線方向、即ち、周方向から圧入可能となり、圧入
ストロークは突起を凹溝に軸方向から圧入する場合に比
し極めて短くなる。そのため、突起と凹溝との間の締め
代を比較的大きく取っても、圧入負荷が過大になること
はない。また、ストレート部の存在により突起と凹溝と
の嵌合部を支点にした分割コアの傾動が防止され、締め
代を充分に確保できることと相俟って、分割コア間のガ
タを確実に防止でき、高品質のステータコアを得られ
る。According to the present invention, the protrusion of one of the divided cores adjacent in the circumferential direction can be press-fitted into the concave groove of the other split core in the direction normal to the end face of the yoke portion, that is, in the circumferential direction. The length is extremely short as compared with the case where the projection is press-fitted into the concave groove from the axial direction. Therefore, even if the interference between the projection and the groove is relatively large, the press-fitting load does not become excessive. In addition, the presence of the straight portion prevents tilting of the split core with the fulcrum of the fitting portion between the protrusion and the concave groove, and in addition to securing a sufficient interference, securely prevents backlash between the split cores. And a high quality stator core can be obtained.
【０００６】ところで、凹溝を、そのストレート部の幅
方向の中心線がヨーク部の周方向他端面の幅方向中心を
通る法線に合致するように形成すると、凹溝の外径側の
溝壁が凹溝の内径側の溝壁よりも薄くなり、外径側の溝
壁の曲げ剛性が内径側の溝壁の曲げ剛性より低くなっ
て、突起を凹溝に圧入したとき外径側の溝壁のみが撓
み、隣接する分割コア間に径方向の段差が発生してしま
う。そのため、凹溝を、ストレート部の幅方向の中心線
がヨーク部の周方向他端面の幅方向中心を通る法線に対
し内径側にオフセットされるように形成して、凹溝の外
径側の溝壁の曲げ剛性と内径側の溝壁の曲げ剛性とが等
しくなるようにし、段差の発生を防止することが望まし
い。When the groove is formed so that the center line in the width direction of the straight portion coincides with the normal passing through the center in the width direction of the other circumferential end surface of the yoke portion, the groove on the outer diameter side of the groove is formed. The wall becomes thinner than the groove wall on the inner diameter side of the concave groove, and the bending rigidity of the groove wall on the outer diameter side becomes lower than the bending rigidity of the groove wall on the inner diameter side. Only the groove wall is bent, and a step in the radial direction is generated between adjacent divided cores. Therefore, the groove is formed so that the center line in the width direction of the straight portion is offset to the inner diameter side with respect to the normal passing through the center in the width direction of the other end surface in the circumferential direction of the yoke portion. It is desirable that the bending rigidity of the groove wall is equal to the bending rigidity of the groove wall on the inner diameter side to prevent the occurrence of a step.
【０００７】また、突起と凹溝との縊れ部間における前
記法線方向の締め代が確保されるように、突起のストレ
ート部の長さを凹溝のストレート部の長さより若干長く
しておけば、突起と凹溝の縊れ部間における前記法線方
向の締め代を確保して、分割コア間の周方向の遊びを完
全に除去でき、有利である。Further, the length of the straight portion of the projection is slightly longer than the length of the straight portion of the concave groove so that the interference in the normal direction between the narrowed portion between the projection and the concave groove is secured. In this case, the interference in the normal direction between the narrowed portion of the projection and the concave groove can be secured, and the circumferential play between the divided cores can be completely removed, which is advantageous.
【０００８】[0008]
【発明の実施の形態】図１を参照して、１はステータコ
アの構成単位となる分割コアを示し、帯状鋼板から打抜
いた打抜き片の多数枚を積層して構成されている。分割
コア１は、円弧状のヨーク部２と、ヨーク部２の中央か
ら径方向内方にのびるポール部３と、ポール部３の径方
向内端の歯部４とを備えている。ポール部３にはボビン
５ａを介してステータコイル５が巻回されるようになっ
ており、該コイル５の端面に沿うように、ヨーク部２の
径方向内側面はポール部３に直交する平坦面に形成され
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a split core as a structural unit of a stator core, which is formed by stacking a large number of punched pieces punched from a strip-shaped steel plate. The split core 1 includes an arc-shaped yoke portion 2, a pole portion 3 extending radially inward from the center of the yoke portion 2, and a tooth portion 4 at a radially inner end of the pole portion 3. A stator coil 5 is wound around the pole portion 3 via a bobbin 5a. A radially inner surface of the yoke portion 2 is flat along the end face of the coil 5 and is orthogonal to the pole portion 3. Formed on the surface.
【０００９】ヨーク部２の周方向一端と他端とには夫々
突起６と凹溝７とが形成されており、各分割コイル１の
突起６を周方向に隣接する各分割コイル１の凹溝７に周
方向から圧入可能としている。A protrusion 6 and a concave groove 7 are formed at one end and the other end in the circumferential direction of the yoke portion 2, respectively. The protrusion 6 of each divided coil 1 is formed with a concave groove of each divided coil 1 adjacent in the circumferential direction. 7 can be press-fitted from the circumferential direction.
【００１０】図１（Ｂ）（Ｃ）に明示されているよう
に、突起６と凹溝７との中間部には、ヨーク部２の各端
面の法線方向に一定幅で真直に延在するストレート部６
ａ，７ａが形成されており、突起６の先端部６ｂと凹溝
７の内底部７ｂとはストレート部６ａ，７ａの幅と同一
直径の半円状に形成されている。また、突起６と凹溝７
のヨーク部２の各端面寄りの部分には、ストレート部６
ａ，７ａに隣接する、ストレート部６ａ，７ａより幅狭
の縊れ部６ｃ，７ｃと、縊れ部６ｃ，７ｃからヨーク部
２の各端面に向って拡幅する拡幅部６ｄ，７ｄとが形成
されている。尚、縊れ部６ｃ，７ｃは、ストレート部６
ａ，７ａの側縁に、ストレート部６ａ，７ａの幅と同一
直径の円ａの円弧を介して連続しており、円ａの直径と
縊れ部６ｃ，７ｃを通る円ａの弦の長さとの差分だけ縊
れ部６ｃ，７ｃの幅がストレート部６ａ，７ａの幅より
僅かに（例えば0.05mm程度）狭くなっている。As clearly shown in FIGS. 1B and 1C, an intermediate portion between the projection 6 and the concave groove 7 extends straight at a constant width in a direction normal to each end face of the yoke portion 2. Straight part 6
a, 7a are formed, and the tip 6b of the protrusion 6 and the inner bottom 7b of the concave groove 7 are formed in a semicircular shape having the same diameter as the width of the straight portions 6a, 7a. Also, the protrusion 6 and the concave groove 7
A straight portion 6 is provided at a portion of each yoke portion 2 near each end face.
The narrow portions 6c, 7c, which are narrower than the straight portions 6a, 7a, and the wide portions 6d, 7d which widen from the narrow portions 6c, 7c toward the respective end surfaces of the yoke portion 2 are formed adjacent to the straight portions 6a, 7a. Have been. Note that the hanging portions 6c and 7c are
a, 7a are continuous with the side edges of the circle a having the same diameter as the width of the straight portions 6a, 7a through an arc of the circle a, and have the diameter of the circle a and the length of the chord of the circle a passing through the constricted portions 6c, 7c. The width of the constricted portions 6c, 7c is slightly (for example, about 0.05 mm) smaller than the width of the straight portions 6a, 7a by the difference from the above.
【００１１】突起６の拡幅部６ｄと凹溝７の拡幅部７ｄ
とは合同であるが、突起６のストレート部６ａの幅と長
さは凹溝７のストレート部７ａの幅と長さより若干大き
くなっている。例えば、ヨーク部２の径方向外側面の半
径が79.5mm、ヨーク部２の各端面の幅Ｔが9.5mmである
場合、突起６のストレート部６ａの長さＬ１と幅を夫々
1.0mm，6.02mmに設定し、凹溝７のストレート部７ａの
長さＬ２と幅を夫々0.98mm，5.98mmに設定する。The widened portion 6d of the projection 6 and the widened portion 7d of the concave groove 7
However, the width and length of the straight portion 6a of the protrusion 6 are slightly larger than the width and length of the straight portion 7a of the concave groove 7. For example, when the radius of the radially outer surface of the yoke portion 2 is 79.5 mm and the width T of each end surface of the yoke portion 2 is 9.5 mm, the length L1 and the width of the straight portion 6a of the projection 6 are respectively set.
The length L2 and the width of the straight portion 7a of the concave groove 7 are set to 0.98 mm and 5.98 mm, respectively.
【００１２】また、ヨーク部２の径方向内側面が上記の
如く平坦面に形成されているため、ヨーク部２の端面か
らその法線方向に凹入する凹溝７は、次第に、ヨーク部
２の径方向内側面から離れ、ヨーク部２の径方向外側面
に近付く。その結果、凹溝７を、そのストレート部７ａ
の幅方向中心線ｂがヨーク部２の端面の幅方向中心を通
る法線ｃに合致するように形成すると、凹溝７の外径側
の溝壁２ａの曲げ剛性が内径側の溝壁２ｂの曲げ剛性よ
りも弱くなる。そこで、本実施形態では、凹溝７を、前
記中心線ｂが前記法線ｃに対し内径側に若干オフセット
されるように形成し、外径側溝壁２ａの曲げ剛性と内径
側溝壁２ｂの曲げ剛性とが等しくなるようにしている。
上記した寸法のヨーク部２の場合、前記法線ｃに対する
前記中心線ｂの内径側へのオフセット量を0.75mm程度に
設定すると、両溝壁２ａ，２ｂの曲げ剛性が等しくな
る。尚、当然のことではあるが、突起６もそのストレー
ト部６ａの中心線ｂがヨーク部２の端面の幅方向中心を
通る法線ｃに対し内径側にオフセットされるように形成
する。Further, since the radially inner surface of the yoke portion 2 is formed as a flat surface as described above, the concave groove 7 which is recessed in the normal direction from the end surface of the yoke portion 2 is gradually formed. From the radially inner surface of the yoke 2 and closer to the radially outer surface of the yoke portion 2. As a result, the groove 7 is inserted into the straight portion 7a.
Is formed so as to match the normal c passing through the center of the end face of the yoke portion 2 in the width direction, the bending rigidity of the groove wall 2a on the outer diameter side of the concave groove 7 becomes smaller than the groove wall 2b on the inner diameter side. Than the flexural rigidity of Therefore, in the present embodiment, the concave groove 7 is formed so that the center line b is slightly offset to the inner diameter side with respect to the normal line c, and the bending rigidity of the outer diameter side groove wall 2a and the bending of the inner diameter side groove wall 2b are changed. The rigidity is made equal.
In the case of the yoke portion 2 having the dimensions described above, when the offset amount of the center line b to the inner diameter side with respect to the normal line c is set to about 0.75 mm, the bending rigidity of both groove walls 2a and 2b becomes equal. As a matter of course, the projection 6 is also formed such that the center line b of the straight portion 6a is offset to the inner diameter side with respect to the normal line c passing through the center in the width direction of the end surface of the yoke portion 2.
【００１３】以上の構成によれば、分割コア１の突起６
を周方向に隣接する分割コア１の凹溝７に前記法線方向
から圧入すると、凹溝７の外径側と内径側の溝壁２ａ，
２ｂの弾性域内での撓みにより、凹溝７の縊れ部７ｃが
突起６のストレート部６ａの通過を許容するように拡幅
され、突起６のストレート部６ａが凹溝７の縊れ部７ｃ
を通過したとき、凹溝７のストレート部７ａと縊れ部７
ｂとが突起６のストレート部６ａと縊れ部６ｂとに圧接
する。そして、ストレート部６ａ，７ａ同士の圧接によ
り、突起６と凹溝７との嵌合部を支点にした分割コア１
の傾動が防止されると共に、突起６のストレート部６ａ
の長さを凹溝７のストレート部７ａの長さより若干長く
してあるため、突起６の縊れ部６ｃと凹溝７の縊れ部７
ｃとの間の前記法線方向の締め代が確保され、その結
果、周方向に隣接する分割コア１，１間の周方向の遊び
が完全に除去される。また、凹溝７の外径側と内径側の
両溝壁２ａ，２ｂの曲げ剛性を等しくしているため、両
溝壁２ａ，２ｂが均等に撓み、突起６が凹溝７にその中
心線上で正しく嵌合する。かくて、周方向に隣接する分
割コア１，１を、前記法線に直交するヨーク部２，２の
端面同士を密に接触させた状態で、ガタや径方向の段差
を生ずることなく正確に連結できる。According to the above configuration, the projection 6 of the split core 1
Is pressed into the groove 7 of the divided core 1 adjacent in the circumferential direction from the normal direction, the groove walls 2a on the outer diameter side and the inner diameter side of the groove 7 are formed.
2b, the narrowed portion 7c of the groove 7 is widened so as to allow the straight portion 6a of the protrusion 6 to pass through, and the straight portion 6a of the protrusion 6 is narrowed by the narrowed portion 7c of the groove 7.
When passing through, the straight portion 7a of the groove 7 and the narrow portion 7
b presses against the straight portion 6a and the constricted portion 6b of the projection 6. Then, the split core 1 having the fitting portion between the protrusion 6 and the concave groove 7 as a fulcrum by pressing the straight portions 6a and 7a together.
Of the projection 6 and the straight portion 6a of the projection 6
Is slightly longer than the length of the straight portion 7a of the concave groove 7, the narrowed portion 6c of the projection 6 and the narrowed portion 7 of the concave groove 7 are formed.
c is secured in the normal direction, and as a result, circumferential play between the divided cores 1 and 1 adjacent in the circumferential direction is completely eliminated. In addition, since the outer wall and the inner wall 2a, 2b of the concave groove 7 have the same bending stiffness, the groove walls 2a, 2b are uniformly bent, and the protrusion 6 is formed on the concave groove 7 on the center line thereof. To fit correctly. Thus, in the state where the end faces of the yoke portions 2 and 2 perpendicular to the normal line are brought into close contact with each other, the divided cores 1 and 1 which are adjacent in the circumferential direction can be accurately formed without generating backlash or radial steps. Can be linked.
【００１４】ステータコアは、上記分割コイル１の複数
個を周方向に環状に連結して組立てられるもので、その
組立は図２及び図３に示す組立装置を用いて行われる。
組立装置は、基台１０と、基台１０の上方に設けた、ラ
ム等のプレス用駆動源で上下動される可動盤１１とを備
える、プレス装置と同様の装置で構成されている。The stator core is assembled by connecting a plurality of the split coils 1 in a ring shape in the circumferential direction, and the assembly is performed by using an assembling apparatus shown in FIGS.
The assembling apparatus is configured by a device similar to a press device, including a base 10 and a movable platen 11 provided above the base 10 and moved up and down by a press drive source such as a ram.
【００１５】基台１０の上面には、放射状に複数のガイ
ド穴１２ａを開設した支持板１２が取付けられており、
該支持板１２上に、分割コア１を保持可能な複数の治具
１３を放射状に配置し、各治具１３の下面に設けたガイ
ド突起１３ａを各ガイド穴１２ａに係合させると共に、
基台１０上に、治具１３の浮上りを防止する中央部の押
え板１４1と、外周部の環状の押え板１４2とを夫々支柱
１４ａ，１４ｂを介して取付け、各治具１３を各ガイド
穴１２ａに沿って放射方向に摺動自在に支持している。A support plate 12 having a plurality of guide holes 12a formed radially is attached to the upper surface of the base 10.
A plurality of jigs 13 capable of holding the divided cores 1 are radially arranged on the support plate 12, and guide projections 13a provided on the lower surface of each jig 13 are engaged with each guide hole 12a.
On the base 10, the presser plate 14 1 of the central portion for preventing the Ri floating of the jig 13, the outer peripheral portion of the annular holding plate 14 2 and the respective struts 14a, attached via 14b, and the jig 13 It is slidably supported in the radial direction along each guide hole 12a.
【００１６】各治具１３は、分割コア１を上方から挿入
セット自在な凹入部１３ｂを備えており、更に、凹入部
１３ｂの放射方向内方部分に、図４に示す如く、内端の
立上り部１３ｃとの間に間隔を存して１対の小突起１３
ｄ，１３ｄを突設し、これら立上り部１３ｃと小突起１
３ｄ，１３ｄとで歯部４を周方向に位置決めして係合可
能な係合溝１３ｅを構成している。Each jig 13 is provided with a recess 13b into which the split core 1 can be inserted and set from above, and a radially inward portion of the recess 13b has a rising end at the inner end as shown in FIG. A pair of small projections 13 with an interval
d, 13d, and the rising portion 13c and the small protrusion 1 are provided.
3d and 13d form an engaging groove 13e that can engage with the tooth portion 4 by positioning it in the circumferential direction.
【００１７】可動盤１１の下面には、各治具１３の放射
方向外端の傾斜面１３ｆに当接可能な下端の傾斜カム面
１５ａを有するカム１５が垂設されており、更に、全て
の分割コア１のヨーク部２に上方から当接してこれら分
割コア１の浮上りを防止する環状のパッド１６がばね１
６ａで下方に付勢して取付けられている。尚、本実施形
態では、カム１５を各治具１３毎に個別に設けている
が、全ての治具１３に共用される環状の単一のカムを設
けても良い。On the lower surface of the movable platen 11, a cam 15 having an inclined cam surface 15a at the lower end capable of contacting the inclined surface 13f at the outer end in the radial direction of each jig 13 is vertically provided. An annular pad 16 which comes into contact with the yoke portion 2 of the divided core 1 from above to prevent the divided core 1 from floating is provided with a spring 1
It is attached by being urged downward at 6a. In this embodiment, the cams 15 are individually provided for each jig 13, but a single annular cam shared by all the jigs 13 may be provided.
【００１８】ステータコアの組立に際しては、先ず、図
２の左半部に示されているように、可動盤１１を上方位
置に戻すと共に全ての治具１３を放射方向外方位置に戻
した状態で、各治具１３に各分割コア１をセットする。
この状態では、図３の左半部に示されているように、各
分割コア１の突起６の先端部６ｂが周方向に隣接する分
割コア１の凹溝７の拡幅部７ｂに入り込んだ状態で、複
数の分割コア１が環状に配置される。When assembling the stator core, first, as shown in the left half of FIG. 2, the movable platen 11 is returned to the upper position, and all the jigs 13 are returned to the radially outward position. Then, each divided core 1 is set on each jig 13.
In this state, as shown in the left half of FIG. 3, the tip 6b of the protrusion 6 of each split core 1 enters the widened portion 7b of the concave groove 7 of the adjacent split core 1 in the circumferential direction. Thus, the plurality of split cores 1 are arranged in an annular shape.
【００１９】次に、図２の右半部に示されているよう
に、可動盤１１を下降させるが、これによれば全ての治
具１３がカム１５に押されて互に同期して放射方向内方
に前進し、これら治具１３に保持される複数の分割コア
１が周方向に接近する。そして、各分割コア１の突起６
が周方向に隣接する各分割コア１の凹溝７に周方向、即
ち、ヨーク部２の端面の法線方向から圧入され、図３の
右半部に示されているように、複数の分割コア１が周方
向に連結される。Next, as shown in the right half of FIG. 2, the movable platen 11 is lowered. According to this, all the jigs 13 are pushed by the cams 15 and radiated synchronously with each other. The plurality of divided cores 1 held by these jigs 13 approach in the circumferential direction. And the projection 6 of each divided core 1
Are press-fitted in the circumferential direction, that is, the normal direction of the end face of the yoke portion 2 into the concave groove 7 of each divided core 1 adjacent in the circumferential direction, and as shown in the right half of FIG. The core 1 is connected in the circumferential direction.
【００２０】この状態では、突起６のストレート部６ａ
と縊れ部６ｃとに凹溝７のストレート部７ａと縊れ部７
ｃとが上記の如く充分な締め代を持って圧接して、分割
コア１同士がガタ無く連結されると共に、パッド１６に
よる分割コア１の浮上り防止で分割コア１間の平坦度も
確保され、更に、各分割コア１の歯部４が各治具１３の
係合溝１３ｅによって周方向に位置決めされているた
め、隣接する分割コア１，１の歯部４，４間のクリアラ
ンスが一定に揃えられ、かくて高品質のステータコアが
得られる。In this state, the straight portion 6a of the projection 6
The straight portion 7a of the concave groove 7 and the narrowed portion 7
c are pressed against each other with a sufficient interference as described above, and the divided cores 1 are connected to each other without play, and the flatness between the divided cores 1 is also secured by preventing the floating of the divided cores 1 by the pads 16. Further, since the teeth 4 of each divided core 1 are positioned in the circumferential direction by the engagement grooves 13e of each jig 13, the clearance between the teeth 4, 4 of the adjacent divided cores 1, 1 is constant. An aligned and thus high quality stator core is obtained.
【図１】 (A)本発明に係るステータコアの構成単位と
なる分割コアの一例の平面図、(B)分割コアの突起部分
の拡大平面図、(C)分割コアの凹溝部分の拡大平面図1A is a plan view of an example of a split core that is a constituent unit of a stator core according to the present invention, FIG. 1B is an enlarged plan view of a projection of the split core, and FIG. Figure
【図２】 ステータコアの組立に用いる装置の縦断面図FIG. 2 is a longitudinal sectional view of an apparatus used for assembling a stator core.
【図３】 図２のIII-III線截断平面図FIG. 3 is a plan view cut along the line III-III of FIG. 2;
【図４】 組立装置に設けられる治具の斜視図FIG. 4 is a perspective view of a jig provided in the assembling apparatus.
１ 分割コア ２ ヨーク部 ２ａ 外径側溝壁 ２ｂ 内径側溝壁 ６ 突起 ６ａ ストレート部 ６ｂ 先端部 ６ｃ 縊れ部 ６ｄ 拡幅部 ７ 凹溝 ７ａ ストレート部 ７ｂ 内底部 ７ｃ 縊れ部 ７ｄ 拡幅部 Reference Signs List 1 split core 2 yoke part 2a outer diameter side groove wall 2b inner diameter side groove wall 6 protrusion 6a straight part 6b tip part 6c narrow part 6d wide part 7 concave groove 7a straight part 7b inner bottom part 7c narrow part 7d wide part
Claims (3)
部の周方向一端と他端とに夫々突起と凹溝とを形成し、
複数の分割コアを、隣接する一方の分割コアの突起を他
方の分割コアの凹溝に嵌合させることにより、周方向に
連結して組立てられるステータコアにおいて、 突起と凹溝との中間部分に、ヨーク部の各端面の法線方
向に一定幅で真直に延在するストレート部を形成し、突
起の先端部と凹溝の内底部とをストレート部の幅と同一
の直径の半円状に形成すると共に、突起と凹溝のヨーク
部の各端面寄りの部分に、ストレート部に隣接する、ス
トレート部より幅狭の縊れ部と、縊れ部からヨーク部の
各端面に向かって拡幅する拡幅部とを形成し、 突起を前記法線方向から凹溝に圧入する際に、凹溝の外
径側と内径側の溝壁の弾性域内での撓みにより凹溝の縊
れ部が突起のストレート部の通過を許容するように拡幅
され、突起のストレート部が凹溝の縊れ部を通過したと
き、凹溝のストレート部と縊れ部とが夫々突起のストレ
ート部と縊れ部とに圧接するようにした、ことを特徴と
するステータコア。1. A projection and a concave groove are formed at one end and the other end in the circumferential direction of a yoke portion of each divided core divided in a circumferential direction, respectively.
By fitting the plurality of split cores with the protrusions of one of the adjacent split cores into the grooves of the other split core, the stator core is assembled in a circumferentially connected manner. Form a straight part that extends straight at a constant width in the direction of the normal of each end face of the yoke part, and form the tip of the projection and the inner bottom of the concave groove into a semicircle with the same diameter as the width of the straight part At the same time, in the portion near each end face of the yoke portion of the projection and the concave groove, a narrow portion adjacent to the straight portion, narrower than the straight portion, and widening from the narrow portion toward each end face of the yoke portion When the protrusion is press-fitted into the groove from the normal direction, the narrow portion of the groove is straightened by bending in the elastic region of the groove walls on the outer and inner diameter sides of the groove. The width of the projection is widened to allow the passage of When passing through the constricted portion, the stator core, wherein the a constricted portion straight portion of the groove is in pressure-contact to the portion constricted as the straight portion of each projection, that.
がヨーク部の周方向他端面の幅方向中心を通る法線に対
し内径側にオフセットされるように形成して、凹溝の外
径側の溝壁の曲げ剛性と内径側の溝壁の曲げ剛性とが等
しくなるようにすることを特徴とする請求項１に記載の
ステータコア。2. The groove is formed such that the center line in the width direction of the straight portion is offset to the inner diameter side with respect to a normal passing through the center in the width direction of the other circumferential end surface of the yoke portion. 2. The stator core according to claim 1, wherein the bending rigidity of the outer-diameter groove wall is equal to the bending rigidity of the inner-diameter groove wall.
線方向の締め代が確保されるように、突起のストレート
部の長さを凹溝のストレート部の長さより若干長くする
ことを特徴とする請求項１又は２に記載のステータコ
ア。3. The length of the straight portion of the projection is slightly longer than the length of the straight portion of the groove so as to secure the interference in the normal direction between the narrowed portion between the protrusion and the groove. The stator core according to claim 1 or 2, wherein:
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03517196A JP3306645B2 (en) | 1996-02-22 | 1996-02-22 | Stator core |
| GB9702521A GB2310545B (en) | 1996-02-22 | 1997-02-07 | Stator core and method and apparatus for assembling same |
| US08/803,228 US5786651A (en) | 1996-02-22 | 1997-02-20 | Stator core having a plurality of connected circumferentially segmented cores and method and apparatus for assembling same |
| US09/078,683 US6219900B1 (en) | 1996-02-22 | 1998-05-14 | Method of assembling a stator core |
| US09/776,634 US6684489B2 (en) | 1996-02-22 | 2001-02-06 | Apparatus for assembling a stator core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03517196A JP3306645B2 (en) | 1996-02-22 | 1996-02-22 | Stator core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09233742A JPH09233742A (en) | 1997-09-05 |
| JP3306645B2 true JP3306645B2 (en) | 2002-07-24 |
Family
ID=12434420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03517196A Expired - Fee Related JP3306645B2 (en) | 1996-02-22 | 1996-02-22 | Stator core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3306645B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3284087B2 (en) * | 1997-09-12 | 2002-05-20 | 本田技研工業株式会社 | Generator motor |
| US6700284B2 (en) * | 2001-03-26 | 2004-03-02 | Emerson Electric Co. | Fan assembly including a segmented stator switched reluctance fan motor |
| EP1598918A1 (en) * | 2004-05-17 | 2005-11-23 | Grundfos A/S | Lamination stack made by segments |
| JP4649225B2 (en) * | 2005-02-14 | 2011-03-09 | 株式会社東芝 | Outer rotor and manufacturing method thereof |
| JP4579775B2 (en) * | 2005-06-15 | 2010-11-10 | 東芝産業機器製造株式会社 | Stator core and stator for rotating electrical machine |
| JP4998450B2 (en) | 2008-12-09 | 2012-08-15 | トヨタ自動車株式会社 | Stator manufacturing method |
| JP2011045179A (en) * | 2009-08-20 | 2011-03-03 | Honda Motor Co Ltd | Stator and method for manufacturing the same |
| JP4716060B2 (en) * | 2009-11-30 | 2011-07-06 | 株式会社富士通ゼネラル | Axial gap type electric motor and pump device |
| JP5633159B2 (en) * | 2010-03-01 | 2014-12-03 | トヨタ自動車株式会社 | Stator |
-
1996
- 1996-02-22 JP JP03517196A patent/JP3306645B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09233742A (en) | 1997-09-05 |
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