JP6313572B2 - Armature core - Google Patents

Armature core Download PDF

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JP6313572B2
JP6313572B2 JP2013238073A JP2013238073A JP6313572B2 JP 6313572 B2 JP6313572 B2 JP 6313572B2 JP 2013238073 A JP2013238073 A JP 2013238073A JP 2013238073 A JP2013238073 A JP 2013238073A JP 6313572 B2 JP6313572 B2 JP 6313572B2
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fitting convex
convex portion
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core
contact
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JP2015100166A (en
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鈴木 工
工 鈴木
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Asmo Co Ltd
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Description

本発明は、電機子コアに関する。   The present invention relates to an armature core.

下記特許文献1には、導電性の巻線が巻回されるティース部を有する分割コアを環状に配列させると共に、隣接する分割コア同士を係合させ、更にシャフトを軸心部に圧入させることによって構成された電機子コア(ステータコア)が開示されている。また、この分割コア同士は、各々の係合凹部と係合凸部とが係合されることによってステータコアの周方向に沿って連結されている。   In Patent Document 1 below, divided cores having teeth portions around which conductive windings are wound are annularly arranged, adjacent divided cores are engaged with each other, and a shaft is press-fitted into an axial center portion. The armature core (stator core) comprised by this is disclosed. In addition, the divided cores are connected along the circumferential direction of the stator core by engaging the engaging concave portions and the engaging convex portions.

特開2007−159170号公報JP 2007-159170 A

しかしながら、前述の係合凹部と係合凸部とを係合させると共にシャフトを軸心部に圧入させることによって構成された電機子コアでは、環状に配列された分割コアの形状を保持するためにシャフトの圧入代をより大きくすることが考えられるが、この場合、係合凹部及び係合凸部に生じる応力が高くなり、すなわち、係合凹部及び係合凸部の変形が大きくなり、一の分割コアと当該一の分割コアに隣接する他の分割コアとの間のエアギャップが大きくなり、電機子コア内における磁気損失が大きくなることが考えられる。   However, in the armature core configured by engaging the engaging concave portion and the engaging convex portion and press-fitting the shaft into the shaft center portion, the shape of the annularly arranged divided cores is maintained. It is conceivable to increase the press-fitting allowance of the shaft, but in this case, the stress generated in the engaging concave portion and the engaging convex portion is increased, that is, the deformation of the engaging concave portion and the engaging convex portion is increased. It is conceivable that the air gap between the split core and another split core adjacent to the one split core is increased, and the magnetic loss in the armature core is increased.

本発明は上記事実を考慮し、環状に配列された分割コアの形状を保持することができると共に磁気損失を抑制することができる電機子コアを得ることが目的である。   In view of the above facts, an object of the present invention is to obtain an armature core that can retain the shape of the annularly arranged divided cores and can suppress magnetic loss.

請求項1記載の電機子コアは、径方向に延在されたティース部と、前記ティース部の径方向内側に設けられた連結部と、前記連結部の周方向一方側の端部に設けられ、周方向一方側に突出する第1嵌合凸部と、前記連結部の周方向他方側の端部に設けられ、周方向他方側に突出する第2嵌合凸部と、を有する複数の分割コアと、一の前記分割コアの前記第1嵌合凸部が周方向に隣接する他の前記分割コアの前記第2嵌合凸部に嵌合されることによって環状に配列された前記複数の分割コアの軸心部に圧入される芯部材と、を備え、前記第1嵌合凸部は、前記第2嵌合凸部側に向けて突出する第1突出部を備えていると共に、前記第2嵌合凸部は、前記第1嵌合凸部側に向けて突出する第2突出部を備えており、前記芯部材が前記複数の分割コアの軸心部に圧入された状態で、前記第1突出部と前記第2突出部とが接触部で接触することによって前記複数の分割コアの周方向への移動が規制されており、前記第1嵌合凸部及び前記第2嵌合凸部は、前記接触部において各々の突出方向に向けて次第に拡幅していると共に、前記第1嵌合凸部及び前記第2嵌合凸部の少なくともいずれか一方は、前記接触部よりも各々の突出方向の先端側において次第に窄まるように形成されており、前記連結部の周方向他方側の端部の径方向への寸法が該連結部の周方向の中間部の径方向への寸法よりも大きく設定されており、前記第2嵌合凸部は、前記接触部より突出方向の先端側において次第に窄まるように形成されており、前記第2嵌合凸部は、外側嵌合凸部及び該外側嵌合凸部よりも径方向内側に配置された内側嵌合凸部を含み、前記外側嵌合凸部の径方向外側の部位は、径方向外側へ向けて突出すると共に軸方向から見て三角形状に形成されている。 The armature core according to claim 1 is provided at a tooth portion extending in a radial direction, a connecting portion provided on a radially inner side of the tooth portion, and an end portion on one circumferential side of the connecting portion. A plurality of first fitting projections protruding to one side in the circumferential direction, and second fitting projections provided on the other end in the circumferential direction of the connecting portion and protruding to the other side in the circumferential direction. The plurality of split cores arranged in an annular shape by fitting the first fitting convex portions of one of the divided cores with the second fitting convex portions of the other divided cores adjacent in the circumferential direction. A core member press-fitted into the axial center portion of the split core, and the first fitting convex portion includes a first projecting portion projecting toward the second fitting convex portion side, The second fitting convex portion includes a second projecting portion that projects toward the first fitting convex portion side, and the core member includes the plurality of divided cores. In the state where the first projecting portion and the second projecting portion are in contact with each other in a state of being press-fitted into the shaft center portion, movement in the circumferential direction of the plurality of split cores is restricted, The first fitting convex portion and the second fitting convex portion are gradually widened in the projecting direction in the contact portion, and at least of the first fitting convex portion and the second fitting convex portion. Either one is formed so as to be gradually narrowed at the front end side in each projecting direction from the contact portion, and the dimension in the radial direction of the end portion on the other circumferential side of the connecting portion is the size of the connecting portion. It is set to be larger than the dimension in the radial direction of the intermediate portion in the circumferential direction, and the second fitting convex portion is formed so as to be gradually narrowed on the tip side in the protruding direction from the contact portion. 2 The fitting convex part is radially inner than the outer fitting convex part and the outer fitting convex part. Includes an inner fitting convex portions arranged in the radial outer region of the outer fitting convex portion is formed in a triangular shape as viewed in the axial direction as to protrude radially outward.

請求項1記載の電機子コアによれば、芯部材が環状に配列された複数の分割コアの軸心部に圧入されると、各々の分割コアはそれぞれ径方向外側に放射状に移動して、一の分割コアの第1嵌合凸部と他の分割コアの第2嵌合凸部とが接触部で接触する。これにより、複数のティース部を有する電機子コアが構成される。ここで、本電機子コアでは、第1嵌合凸部及び第2嵌合凸部の少なくともいずれか一方が、接触部よりも各々の突出方向の先端側において次第に窄まるように形成されていることにより、当該窄まるように形成された部位の肉厚を確保することができる。これにより、当該部位の変形が抑制され、少ない圧入代であっても各々の分割コアの連結力を確保することができる。すなわち、少ない圧入代であっても環状に配列された分割コアの形状を保持することができる。また、当該部位の変形が抑制されることにより、一の分割コアの連結部と他の分割コアの連結部との間に形成されるエアギャップを小さくすることができ、これにより電機子コア内部における磁気損失を抑制することができる。   According to the armature core according to claim 1, when the core member is press-fitted into the axial center portion of the plurality of split cores arranged in an annular shape, each split core moves radially outward in the radial direction, The 1st fitting convex part of one division | segmentation core and the 2nd fitting convex part of another division | segmentation core contact at a contact part. Thereby, an armature core having a plurality of teeth portions is formed. Here, in the armature core, at least one of the first fitting convex portion and the second fitting convex portion is formed so as to be gradually narrowed on the tip side in each protruding direction from the contact portion. As a result, the thickness of the portion formed so as to be constricted can be ensured. Thereby, the deformation | transformation of the said site | part is suppressed and the connection force of each division | segmentation core can be ensured even if there is little press-fitting allowance. That is, the shape of the divided cores arranged in a ring shape can be maintained even with a small press-fitting allowance. Further, by suppressing the deformation of the part, the air gap formed between the connecting portion of one divided core and the connecting portion of the other divided core can be reduced, and thereby the inside of the armature core The magnetic loss in can be suppressed.

請求項2記載の電機子コアは、請求項1記載の電機子コアにおいて、前記第1嵌合凸部は、前記接触部よりも各々の突出方向の先端側において次第に窄まるように形成されている。 The armature core according to a second aspect is the armature core according to the first aspect, wherein the first fitting convex portion is formed so as to be gradually narrowed at a distal end side in each projecting direction from the contact portion. Yes.

請求項2記載の電機子コアによれば、前述の窄まるように形成された部位が、第1嵌合凸部及び第2嵌合凸部の両方に設けられている。これにより、一の分割コアの連結部と他の分割コアの連結部との間に形成されるエアギャップをより一層小さくすることができる。その結果、電機子コア内部における磁気損失をより一層抑制することができる。   According to the armature core of the second aspect, the portion formed so as to be narrowed is provided on both the first fitting convex portion and the second fitting convex portion. Thereby, the air gap formed between the connection part of one division | segmentation core and the connection part of another division | segmentation core can be made still smaller. As a result, the magnetic loss inside the armature core can be further suppressed.

請求項3記載の電機子コアは、請求項1又は請求項2記載の電機子コアにおいて、 前記連結部の周方向他方側には一対の前記第2嵌合凸部が設けられており、一の前記分割コアの前記第1嵌合凸部が他の前記分割コアの前記一対の第2嵌合凸部の間に嵌合されることによって前記複数の分割コアが環状に配列されており、前記芯部材が前記複数の分割コアの軸心部に圧入された状態で、前記第1嵌合凸部と前記一対の第2嵌合凸部とが、2箇所の前記接触部で接触することによって、前記複数の分割コアの周方向への移動が規制されている。   The armature core according to claim 3 is the armature core according to claim 1 or 2, wherein the pair of second fitting convex portions are provided on the other circumferential side of the connecting portion. The plurality of divided cores are arranged in an annular shape by fitting the first fitting convex portions of the divided cores between the pair of second fitting convex portions of the other divided cores, The first fitting convex portion and the pair of second fitting convex portions are in contact with each other at the two contact portions in a state where the core member is press-fitted into the axial center portion of the plurality of split cores. Therefore, movement of the plurality of divided cores in the circumferential direction is restricted.

請求項3記載の電機子コアによれば、芯部材の圧入によって電機子コア内に生じる応力を一対の第2嵌合凸部に分散させることができる。これにより、一の分割コアの連結部と他の分割コアの連結部との間に形成されるエアギャップをより一層小さくすることができる。その結果、電機子コア内部における磁気損失をより一層抑制することができる。   According to the armature core of the third aspect, the stress generated in the armature core due to the press-fitting of the core member can be dispersed in the pair of second fitting convex portions. Thereby, the air gap formed between the connection part of one division | segmentation core and the connection part of another division | segmentation core can be made still smaller. As a result, the magnetic loss inside the armature core can be further suppressed.

請求項1〜請求項3のいずれか1項に記載の電機子コアによれば、連結部の寸法が上記のように設定されていることにより、第2嵌合凸部の突出方向の先端側の肉厚をより一層確保することができる。これにより、第2嵌合凸部の突出方向の先端側の変形を抑制することができ、ひいては、一の分割コアの連結部と他の分割コアの連結部との間に形成されるエアギャップをより一層小さくすることができる。その結果、電機子コア内部における磁気損失をより一層抑制することができる。
請求項4記載の電機子コアは、請求項1〜請求項3のいずれか1項に記載の電機子コアにおいて、前記外側嵌合凸部の径方向外側の端は、環状に配列された複数の前記分割コアの軸心部に前記芯部材が圧入された状態において、一の前記分割コアのティース部の中心線と他の前記分割コアのティース部の中心線とを周方向に二等分する二等分線上に位置している。
According to the armature core according to any one of claims 1 to 3, when the dimension of the connecting portion is set as described above, the distal end side in the protruding direction of the second fitting convex portion It is possible to further secure the wall thickness. Thereby, the deformation | transformation of the front end side of the protrusion direction of a 2nd fitting convex part can be suppressed, and the air gap formed between the connection part of one division | segmentation core and the connection part of another division | segmentation core by extension. Can be further reduced. As a result, the magnetic loss inside the armature core can be further suppressed.
The armature core according to claim 4 is the armature core according to any one of claims 1 to 3, wherein a plurality of radially outer ends of the outer fitting protrusions are arranged in a ring shape. In the state where the core member is press-fitted into the axial center portion of the split core, the center line of the tooth portion of one split core and the center line of the tooth portion of the other split core are equally divided in the circumferential direction. It is located on a bisector.

本実施形態のステータコア及び当該ステータコアを含んで構成されたステータを示す斜視図である。It is a perspective view which shows the stator comprised including the stator core of this embodiment, and the said stator core. 本実施形態のステータコア及び当該ステータコアを含んで構成されたステータを示す平面図である。It is a top view which shows the stator comprised including the stator core of this embodiment, and the said stator core. シャフトが圧入される前の状態における嵌合凹部及び当該嵌合凹部に嵌合している嵌合凸部を示す拡大平面図である。It is an enlarged plan view which shows the fitting recessed part and the fitting convex part which are fitted in the said fitting recessed part in the state before a shaft is press-fitted. シャフトが圧入が完了した状態における嵌合凹部及び当該嵌合凹部に嵌合している嵌合凸部を示す拡大平面図である。It is an enlarged plan view which shows the fitting recessed part fitted in the fitting recessed part and the said fitting recessed part in the state in which the press fit of the shaft was completed. 嵌合凹部を示す拡大平面図である。It is an enlarged plan view which shows a fitting recessed part. 図5に示された嵌合凹部の開放端側を6−6線に沿って切断した断面を示す断面図である。It is sectional drawing which shows the cross section which cut | disconnected the open end side of the fitting recessed part shown by FIG. 5 along 6-6 line. 対比例に係る嵌合凹部を示す拡大平面図である。It is an enlarged plan view which shows the fitting recessed part which concerns on proportionality. 図7に示された嵌合凹部の開放端側を8−8線に沿って切断した断面を示す断面図である。It is sectional drawing which shows the cross section which cut | disconnected the open end side of the fitting recessed part shown by FIG. 7 along 8-8 line. 第1変形例に係る嵌合凹部及び当該嵌合凹部に嵌合している嵌合凸部を示す拡大平面図である。It is an enlarged plan view which shows the fitting convex part currently fitted to the fitting recessed part which concerns on the 1st modification, and the said fitting recessed part. 第2変形例に係る嵌合凹部及び当該嵌合凹部に嵌合している嵌合凸部を示す拡大平面図である。It is an enlarged plan view which shows the fitting convex part currently fitted to the fitting recessed part which concerns on the 2nd modification, and the said fitting recessed part. 第3変形例に係る嵌合凸部を示す拡大平面図である。It is an enlarged plan view which shows the fitting convex part which concerns on a 3rd modification.

図1〜図4を用いて本発明の実施形態に係る電機子コアについて説明する。なお、図中に適宜示す矢印Z方向、矢印R方向及び矢印C方向は、回転電機の軸方向、径方向及び周方向をそれぞれ示すものとする。また以下、単に軸方向、径方向、周方向を示す場合は、特に断りのない限り、回転電機の軸方向、径方向、周方向を示すものとする。   The armature core which concerns on embodiment of this invention is demonstrated using FIGS. 1-4. In addition, the arrow Z direction, the arrow R direction, and the arrow C direction that are appropriately shown in the drawing respectively indicate the axial direction, the radial direction, and the circumferential direction of the rotating electrical machine. In addition, hereinafter, when only the axial direction, the radial direction, and the circumferential direction are indicated, the axial direction, the radial direction, and the circumferential direction of the rotating electrical machine are indicated unless otherwise specified.

図1及び図2に示されるように、本実施形態の電機子コアとしてのステータコア10は、周方向に沿って複数(本実施形態では12個)の分割コア12が配列され、さらに円柱状に形成された芯部材としてのシャフト14が環状に配列された12個の分割コアの軸心部に圧入されることによって構成された分割構造とされている。   As shown in FIGS. 1 and 2, the stator core 10 as the armature core of the present embodiment has a plurality of (in the present embodiment, twelve) divided cores 12 arranged in the circumferential direction, and further in a cylindrical shape. The formed shaft 14 as a core member is formed into a divided structure formed by being press-fitted into the axial centers of 12 divided cores arranged in an annular shape.

図1に示されるように、分割コア12は、径方向に延在された分割コア構成片16が、軸方向に積層されることによって構成されており、分割コア12を構成する分割コア構成片16は、板状素材に打ち抜き加工(プレス加工)等が施されることによって成形されている。具体的には、分割コア構成片16は、径方向に延在された矩形状のティース部構成部18を備えている。また、分割コア構成片16は、ティース部構成部18の先端側(径方向外側)に連結されていると共に、周方向に延在された先端部構成部20を備えている。さらに、分割コア構成片16は、ティース部構成部18の基端側(径方向内側)に連結されていると共に軸方向視で略扇状に形成された連結部構成部22を備えている。   As shown in FIG. 1, the split core 12 is configured by stacking the split core constituent pieces 16 extending in the radial direction in the axial direction, and the split core constituent pieces constituting the split core 12. No. 16 is formed by punching (pressing) a plate-like material. Specifically, the split core component piece 16 includes a rectangular tooth portion component 18 extending in the radial direction. The split core component piece 16 is connected to the distal end side (radially outer side) of the tooth portion constituting portion 18 and includes a distal end portion constituting portion 20 extending in the circumferential direction. Furthermore, the split core component piece 16 includes a connecting portion constituent portion 22 that is connected to the base end side (in the radial direction) of the tooth portion constituting portion 18 and is formed in a substantially fan shape when viewed in the axial direction.

また、連結部構成部22における周方向一方側の端部には、該方向に向けて突出する第1凸状部24が連結部構成部22と一体に設けられている。   Moreover, the 1st convex-shaped part 24 which protrudes toward this direction is provided in the edge part of the circumferential direction one side in the connection part structure part 22 with the connection part structure part 22 integrally.

また、連結部構成部22における周方向他方側の端部には、該方向に向けて突出する第2凸状部100及び第3凸状部102が連結部構成部22と一体に設けられている。また、第2凸状部100と第3凸状部102とは径方向に間隔を空けて配置されており、これにより、第2凸状部100と第3凸状部102との間には、径方向他方側に向けて開放された凹状部26が形成されている。   In addition, the second convex portion 100 and the third convex portion 102 that protrude in this direction are provided integrally with the connecting portion constituting portion 22 at the end portion on the other circumferential side of the connecting portion constituting portion 22. Yes. In addition, the second convex portion 100 and the third convex portion 102 are arranged with a space therebetween in the radial direction, and thus, between the second convex portion 100 and the third convex portion 102. A concave portion 26 that is open toward the other side in the radial direction is formed.

以上説明した分割コア構成片16が軸方向に積層されて、積層された分割コア構成片16がかしめ部28を介して一体化されることによって、分割コア12が構成されている。図1及び図2に示されるように、前述のティース部構成部18が積層された部位は、導電性の巻線が巻回されるティース部30とされており、先端部構成部20が積層された部位は、図示しないロータのマグネットと対向して配置される先端部32とされている。また、連結部構成部22が積層された部位は、シャフト14が圧入されるスペースを径方向内側に形成する連結部34とされている。   The divided core constituent pieces 16 described above are laminated in the axial direction, and the divided divided core constituent pieces 16 are integrated via the caulking portion 28, whereby the divided core 12 is constituted. As shown in FIG. 1 and FIG. 2, the portion where the above-described tooth portion constituting portion 18 is laminated is a tooth portion 30 around which a conductive winding is wound, and the tip portion constituting portion 20 is laminated. The part made into the front-end | tip part 32 arrange | positioned facing the magnet of the rotor which is not shown in figure. Moreover, the site | part on which the connection part structure part 22 was laminated | stacked is made into the connection part 34 which forms the space where the shaft 14 is press-fit in radial direction inner side.

図3に示されるように、第1凸状部24が積層された部位は第1嵌合凸部としての嵌合凸部36とされており、また第2凸状部100及び第3凸状部102が積層された部位はそれぞれ第2嵌合凸部としての外側嵌合凸部104及び内側嵌合凸部106とされている。さらに、外側嵌合凸部104と内側嵌合凸部106との間には、他の分割コア12の嵌合凸部36が嵌合する嵌合凹部38が形成されている。   As shown in FIG. 3, the portion where the first convex portion 24 is laminated is a fitting convex portion 36 as a first fitting convex portion, and the second convex portion 100 and the third convex shape. The portions where the portions 102 are stacked are an outer fitting convex portion 104 and an inner fitting convex portion 106 as second fitting convex portions, respectively. Furthermore, between the outer fitting convex part 104 and the inner fitting convex part 106, the fitting recessed part 38 which the fitting convex part 36 of the other split core 12 fits is formed.

次に、嵌合凸部36の詳細な構成について説明し、次いで外側嵌合凸部104及び内側嵌合凸部106の詳細な構成について説明する。   Next, a detailed configuration of the fitting convex portion 36 will be described, and then a detailed configuration of the outer fitting convex portion 104 and the inner fitting convex portion 106 will be described.

図4に示されるように、嵌合凸部36は、軸方向視で略矩形状に形成されており、また嵌合凸部36の周方向の中間部は径方向に括れている。なお、嵌合凸部36における最も括れた部位を括れ部36Aという。また、嵌合凸部36の基端側36Bは、即ち、嵌合凸部36における括れ部36Aよりも周方向他方側の部位は、嵌合凸部36の突出方向に行くに従って次第に窄まるように形成されている。さらに、嵌合凸部36の先端側36Cは、即ち、嵌合凸部36における括れ部36Aよりも周方向一方側の部位は、嵌合凸部36の突出方向に行くに従って次第に拡幅するように形成されている。そしてさらに、嵌合凸部36における括れ部36Aよりも周方向一方側の部位の径方向の両端部は、径方向外側及び径方向内側にそれぞれ突出する第1突出部としての嵌合凸部側突出部36Dとされている。   As shown in FIG. 4, the fitting convex portion 36 is formed in a substantially rectangular shape when viewed in the axial direction, and the intermediate portion in the circumferential direction of the fitting convex portion 36 is constricted in the radial direction. The most constricted portion of the fitting convex portion 36 is referred to as a constricted portion 36A. Further, the base end side 36B of the fitting convex portion 36, that is, the portion on the other side in the circumferential direction from the constricted portion 36A of the fitting convex portion 36 is gradually narrowed in the protruding direction of the fitting convex portion 36. Is formed. Further, the distal end side 36C of the fitting convex portion 36, that is, the portion on the one side in the circumferential direction from the constricted portion 36A of the fitting convex portion 36 is gradually widened as it goes in the protruding direction of the fitting convex portion 36. Is formed. Further, both ends in the radial direction of the portion on the one side in the circumferential direction from the constricted portion 36A in the fitting convex portion 36 are the fitting convex portion side as first projecting portions that protrude radially outward and radially inward, respectively. It is set as the protrusion part 36D.

嵌合凸部36の先端側36Cの径方向外側の面及び径方向内側の面は、それぞれ嵌合凸部外側テーパ面A1及び嵌合凸部内側テーパ面A2とされている。   The radially outer surface and radially inner surface of the distal end side 36C of the fitting convex portion 36 are a fitting convex portion outer tapered surface A1 and a fitting convex portion inner tapered surface A2, respectively.

外側嵌合凸部104は、軸方向視で縁部が略六角形状に形成されている。具体的には、この外側嵌合凸部104の径方向外側の部位104Aは、径方向外側に向けて突出する略三角形状(尖形状)に形成されており、図3及び図4に示されるように、この外側嵌合凸部104の径方向外側の端104Bが、ティース部30の径方向内側の端30Aよりも径方向外側に位置している。換言すると、外側嵌合凸部104の径方向外側の部位104Aがティース部30の径方向内側の端30Aよりも径方向外側に突出している。また、外側嵌合凸部104の径方向外側の端104Bは、環状に配列された複数の分割コア12の軸心部にシャフト14が圧入された状態において、一の分割コア12のティース部30の中心線L1(図2参照)と他の分割コア12のティース部の中心線L2(図2参照)とを周方向に二等分する二等分線L3上に位置するようになっている。   The outer fitting convex portion 104 has a substantially hexagonal edge when viewed in the axial direction. Specifically, the radially outer portion 104A of the outer fitting convex portion 104 is formed in a substantially triangular shape (pointed shape) protruding outward in the radial direction, and is shown in FIGS. 3 and 4. As described above, the radially outer end 104 </ b> B of the outer fitting convex portion 104 is positioned more radially outward than the radially inner end 30 </ b> A of the tooth portion 30. In other words, the radially outer portion 104 </ b> A of the outer fitting convex portion 104 protrudes radially outward from the radially inner end 30 </ b> A of the tooth portion 30. Further, the radially outer end 104B of the outer fitting convex portion 104 is a tooth portion 30 of one divided core 12 in a state where the shaft 14 is press-fitted into the axial center portion of the plurality of divided cores 12 arranged in an annular shape. The center line L1 (see FIG. 2) and the center line L2 (see FIG. 2) of the teeth portion of the other divided core 12 are positioned on a bisector L3 that bisects in the circumferential direction. .

外側嵌合凸部104の径方向内側の部位は、径方向内側に向けて突出すると共に縁部が嵌合凸部36の径方向外側の縁部に対応する略三角形状に形成された第2突出部としての外側嵌合凸部側突出部104Cとされている。   The radially inner portion of the outer fitting convex portion 104 protrudes inward in the radial direction, and the edge portion is formed in a substantially triangular shape corresponding to the radially outer edge portion of the fitting convex portion 36. It is set as the outer fitting convex part side protrusion part 104C as a protrusion part.

内側嵌合凸部106は、軸方向視で縁部が略五角形状に形成されており、この内側嵌合凸部106の径方向外側の部位106Aは、径方向外側に向けて突出すると共に縁部が嵌合凸部36の径方向内側の縁部に対応する略三角形状に形成された第2突出部としての内側嵌合凸部側突出部106Aとされている。また、内側嵌合凸部106の径方向内側の端106Bは、環状に配列された複数の分割コア12の軸心部にシャフト14が圧入された状態において、前述の二等分線L3と直交する平面状に形成されている。   The inner fitting convex portion 106 has a substantially pentagonal edge when viewed in the axial direction, and a radially outer portion 106A of the inner fitting convex portion 106 protrudes radially outward and has an edge. The portion is an inner fitting convex portion-side protruding portion 106 </ b> A as a second protruding portion formed in a substantially triangular shape corresponding to the radially inner edge of the fitting convex portion 36. Further, the radially inner end 106B of the inner fitting convex portion 106 is orthogonal to the aforementioned bisector L3 in a state where the shaft 14 is press-fitted into the axial center portion of the plurality of divided cores 12 arranged in an annular shape. It is formed in a flat shape.

また、外側嵌合凸部104の径方向内側の部位104C及び内側嵌合凸部106の径方向外側の部位106Aが前述のように形成されることによって、嵌合凹部38は、上記嵌合凸部36の外縁に対応する矩形状に形成されている。この嵌合凹部38の周方向の中間部は、上記嵌合凸部36に対応して括れている。なお、嵌合凹部38における最も括れた部位を括れ部38Aという。また、嵌合凹部38の閉止端側38Bは、即ち、嵌合凹部38における括れ部38Aよりも周方向一方側の部位は、嵌合凹部38の開放方向に行くに従って次第に窄まるように形成されている。さらに、嵌合凹部38の開放端側38Cは、即ち、嵌合凹部38における括れ部38Aよりも周方向一方側の部位は、嵌合凹部38の開放方向に行くに従って次第に拡幅するように形成されている。   Further, the radially inner portion 104C of the outer fitting convex portion 104 and the radially outer portion 106A of the inner fitting convex portion 106 are formed as described above, so that the fitting concave portion 38 becomes the fitting convex portion. It is formed in a rectangular shape corresponding to the outer edge of the portion 36. An intermediate portion in the circumferential direction of the fitting concave portion 38 is bundled corresponding to the fitting convex portion 36. The most constricted portion in the fitting recess 38 is referred to as a constricted portion 38A. Further, the closed end side 38B of the fitting recess 38, that is, the portion of the fitting recess 38 on the one side in the circumferential direction from the constricted portion 38A is formed so as to gradually narrow toward the opening direction of the fitting recess 38. ing. Furthermore, the open end side 38 </ b> C of the fitting recess 38, that is, a portion of the fitting recess 38 on the one side in the circumferential direction from the constricted portion 38 </ b> A is formed so as to gradually widen in the opening direction of the fitting recess 38. ing.

嵌合凹部38の閉止端側38Bの径方向外側の面及び径方向内側の面は、それぞれ嵌合凹部外側テーパ面B1及び嵌合凹部内側テーパ面B2とされている。また、シャフト14が複数の分割コア12の軸心部に圧入された状態において、嵌合凸部外側テーパ面A1と嵌合凹部外側テーパ面B1とが接触すると共に嵌合凸部内側テーパ面A2と嵌合凹部内側テーパ面B2とが接触するようになっている。また、嵌合凸部外側テーパ面A1と嵌合凹部外側テーパ面B1との接触部を外側接触部C1とし、嵌合凸部内側テーパ面A2と嵌合凹部内側テーパ面B2との接触部を内側接触部C2とする。   The radially outer surface and the radially inner surface of the closed end side 38B of the fitting recess 38 are a fitting recess outer tapered surface B1 and a fitting recess inner tapered surface B2, respectively. Further, in a state where the shaft 14 is press-fitted into the axial center portion of the plurality of split cores 12, the fitting convex outer tapered surface A1 and the fitting concave outer tapered surface B1 are in contact with each other and the fitting convex inner tapered surface A2 is in contact. And the fitting recess inner tapered surface B2 come into contact with each other. Further, a contact portion between the fitting convex portion outer tapered surface A1 and the fitting concave portion outer tapered surface B1 is defined as an outer contact portion C1, and a contact portion between the fitting convex portion inner tapered surface A2 and the fitting concave portion inner tapered surface B2 is defined. The inner contact portion C2.

図2、図3及び図4に示されるように、シャフト14が複数の分割コア12の軸心部に圧入された状態において、外側接触部C1及び内側接触部C2が、前述の二等分線L3上に配置されるように嵌合凸部36及び嵌合凹部38の位置等が調整されている。   As shown in FIGS. 2, 3, and 4, in a state where the shaft 14 is press-fitted into the axial center portion of the plurality of split cores 12, the outer contact portion C <b> 1 and the inner contact portion C <b> 2 The positions and the like of the fitting convex part 36 and the fitting concave part 38 are adjusted so as to be arranged on L3.

次に、前述のステータコア10及び当該ステータコア10を含んで構成された電機子としてのステータ40の製造方法について説明する。   Next, a method for manufacturing the stator core 10 and the stator 40 as an armature including the stator core 10 will be described.

図1及び図2に示されるように、先ず一の分割コア12の嵌合凸部36を他の分割コア12の嵌合凹部38に嵌合させることによって、複数の分割コア12を環状に配列させる(分割コア配列工程)。   As shown in FIGS. 1 and 2, the plurality of divided cores 12 are arranged in an annular shape by first fitting the fitting convex portions 36 of one divided core 12 into the fitting concave portions 38 of the other divided cores 12. (Divided core arrangement step).

次いで、シャフト14を環状に配列された分割コア12の軸心部に圧入する(芯部材圧入工程)。これにより、各々の分割コア12はそれぞれ径方向外側に放射状に移動して、図4に示されるように、一の分割コア12の嵌合凸部36と他の分割コア12の嵌合凹部38とが外側接触部C1及び内側接触部C2の2箇所で接触する。また、一の分割コア12の嵌合凸部36と他の分割コア12の嵌合凹部38とが外側接触部C1及び内側接触部C2の2箇所で接触することによって、各々の分割コア12の周方向への移動が規制される。   Next, the shaft 14 is press-fitted into the axial center portion of the divided cores 12 arranged in an annular shape (core member press-fitting step). Thereby, each divided core 12 moves radially outward in the radial direction, and as shown in FIG. 4, the fitting convex part 36 of one divided core 12 and the fitting concave part 38 of the other divided core 12. Are in contact at two locations, the outer contact portion C1 and the inner contact portion C2. Moreover, the fitting convex part 36 of one division | segmentation core 12 and the fitting recessed part 38 of the other division | segmentation core 12 contact in two places, the outer side contact part C1 and the inner side contact part C2, and each division | segmentation core 12 of each division | segmentation core 12 is contacted. Movement in the circumferential direction is restricted.

以上の分割コア配列工程及び芯部材圧入工程を経てステータコア10が製造される。   The stator core 10 is manufactured through the divided core arrangement process and the core member press-fitting process.

図1及び図2に示されるように、導電性の巻線42を上記の工程を経て製造されたステータコア10の各々のティース部30に巻回することによって、各々のティース部30の回りにコイル44を形成する(巻線巻回工程)。その結果、ステータ40が構成される。   As shown in FIG. 1 and FIG. 2, by winding a conductive winding 42 around each tooth portion 30 of the stator core 10 manufactured through the above-described steps, a coil is wound around each tooth portion 30. 44 is formed (winding winding step). As a result, the stator 40 is configured.

(本実施形態の作用並びに効果)
次に、本実施形態の作用並びに効果について説明する。
(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

図4に示されるように、本ステータコア10では、嵌合凹部38における外側接触部C1及び内側接触部C2よりも周方向他方側が、即ち、嵌合凹部38の開放端側38Cが、次第に拡幅するように形成されていることにより、嵌合凹部38の開放端側38Cの周縁部の肉厚を確保することができる。詳述すると、図5及び図6に示されるように、嵌合凹部38の開放端側38Cが次第に拡幅するように設定した場合、当該嵌合凹部38の周縁部における括れ部38Aよりも周方向他方側の部位の周方向への寸法が増える。すなわち、当該部位を周方向に沿って切断した断面の断面積S1が広くなる。これにより、シャフト14の圧入に伴う当該部位の応力が小さくなり、これにより、当該部位の変形が抑制される。その結果、少ない圧入代であっても各々の分割コア12の連結力を確保することができる。すなわち、少ない圧入代であっても環状に配列された分割コア12の形状を保持することができる。また、嵌合凹部38の開放端側38Cの変形が抑制されることにより、一の分割コア12の連結部34と他の分割コアの連結部34との間に形成されるエアギャップを小さくすることができ、これによりステータコア10内部における磁気損失を抑制することができる。   As shown in FIG. 4, in the stator core 10, the other circumferential side of the fitting recess 38 is wider than the outer contact portion C <b> 1 and the inner contact portion C <b> 2, that is, the open end side 38 </ b> C of the fitting recess 38 is gradually widened. By being formed in this way, the thickness of the peripheral edge portion of the open end side 38C of the fitting recess 38 can be ensured. More specifically, as shown in FIG. 5 and FIG. 6, when the open end side 38 </ b> C of the fitting recess 38 is set so as to gradually widen, it is more circumferential than the constricted portion 38 </ b> A at the peripheral edge of the fitting recess 38. The dimension in the circumferential direction of the other part increases. That is, the cross-sectional area S1 of a cross section obtained by cutting the part along the circumferential direction is increased. Thereby, the stress of the said site | part accompanying the press injection of the shaft 14 becomes small, and, thereby, the deformation | transformation of the said site | part is suppressed. As a result, it is possible to secure the connecting force of each divided core 12 even with a small press-fitting allowance. That is, the shape of the split cores 12 arranged in a ring shape can be maintained even with a small press-fitting allowance. Further, the deformation of the open end side 38C of the fitting recess 38 is suppressed, thereby reducing the air gap formed between the connecting portion 34 of one divided core 12 and the connecting portion 34 of another divided core. As a result, magnetic loss inside the stator core 10 can be suppressed.

これに対して、図7及び図8に示されるように、嵌合凹部38の開放端側38Cが次第に拡幅するように設定されていない場合、当該嵌合凹部38の周縁部における括れ部38Aよりも周方向他方側の部位の周方向への寸法が上記本実施形態の寸法に比して小さい。すなわち、当該部位を周方向に沿って切断した断面の断面積S2が上記実施形態の断面積S1に比して狭い。これにより、シャフト14の圧入に伴う当該部位の応力が大きくなり、当該部位の変形が大きくなる。この場合、各々の分割コア12の連結力を確保するために、シャフト14の圧入代を大きくすることが考えられるが、圧入代を大きくすると、一の分割コア12の連結部34と他の分割コアの連結部34との間に形成されるエアギャップが大きくなり、ステータコア10内部における磁気損失が多くなる。   On the other hand, as shown in FIG. 7 and FIG. 8, when the open end side 38 </ b> C of the fitting recess 38 is not set to gradually widen, the constriction 38 </ b> A at the peripheral edge of the fitting recess 38. Also, the dimension in the circumferential direction of the part on the other circumferential side is smaller than the dimension of the present embodiment. That is, the cross-sectional area S2 of the cross section obtained by cutting the part along the circumferential direction is narrower than the cross-sectional area S1 of the above embodiment. Thereby, the stress of the said part accompanying the press injection of the shaft 14 becomes large, and the deformation | transformation of the said part becomes large. In this case, it is conceivable to increase the press-fitting allowance of the shaft 14 in order to secure the connecting force of each divided core 12. However, if the press-fitting allowance is increased, the connecting portion 34 of one divided core 12 and the other divided parts are separated. The air gap formed between the core connecting portion 34 is increased, and the magnetic loss inside the stator core 10 is increased.

また、図3に示されるように、本実施形態では、外側嵌合凸部104の径方向外側の部位104Aがティース部30の径方向内側の端30Aよりも径方向外側に突出していることにより、連結部34の周方向他方側の端部の径方向への寸法が当該連結部34の周方向の中間部の径方向への寸法よりも大きく設定されている。これにより、嵌合凹部38の開放端側38Cの肉厚をより一層確保することができる、ひいては、一の分割コア12の連結部34と他の分割コア12の連結部34との間に形成されるエアギャップをより一層小さくすることができる。その結果、ステータコア10内部における磁気損失をより一層抑制することができる。   In addition, as shown in FIG. 3, in the present embodiment, the radially outer portion 104 </ b> A of the outer fitting convex portion 104 protrudes radially outward from the radially inner end 30 </ b> A of the tooth portion 30. The dimension in the radial direction of the end portion on the other circumferential side of the connecting portion 34 is set larger than the dimension in the radial direction of the intermediate portion in the circumferential direction of the connecting portion 34. Thereby, the thickness of the open end side 38 </ b> C of the fitting recess 38 can be further secured. As a result, it is formed between the connecting portion 34 of one divided core 12 and the connecting portion 34 of the other divided core 12. The air gap can be further reduced. As a result, the magnetic loss inside the stator core 10 can be further suppressed.

(第1変形例に係る嵌合凸部及び嵌合凹部)
次に、図9を用いて上記実施形態の第1変形例に係る嵌合凸部及び嵌合凹部について説明する。なお、上記実施形態と同一の機能を有する部分については上記実施形態で用いた符号と同一の符号を付してその説明を省略する。
(Fitting convex part and fitting concave part which concern on a 1st modification)
Next, the fitting convex part and fitting concave part which concern on the 1st modification of the said embodiment are demonstrated using FIG. In addition, about the part which has the same function as the said embodiment, the code | symbol same as the code | symbol used in the said embodiment is attached | subjected, and the description is abbreviate | omitted.

図9に示されるように、本変形例の嵌合凸部46は、軸方向視で略矩形状に形成されており、この嵌合凸部46の基端側46Aは、当該嵌合凸部46の突出方向に行くに従って次第に拡幅するように形成されている。また、嵌合凸部46の先端側46Bは、即ち、嵌合凸部46における外側接触部C1及び内側接触部C2(図示省略)よりも周方向一方側は次第に窄まるように形成されている。   As shown in FIG. 9, the fitting convex portion 46 of this modification is formed in a substantially rectangular shape when viewed in the axial direction, and the base end side 46 </ b> A of the fitting convex portion 46 is the fitting convex portion. It is formed so as to gradually widen as it goes in the protruding direction of 46. Further, the distal end side 46B of the fitting convex portion 46 is formed such that one side in the circumferential direction gradually narrows from the outer contact portion C1 and the inner contact portion C2 (not shown) of the fitting convex portion 46. .

本変形例の嵌合凹部48は、上記嵌合凸部46の外縁に対応する矩形状に形成されており、この嵌合凹部48の閉止端側48Aは、当該嵌合凹部48の開放方向に行くに従って次第に拡幅するように形成されている。さらに、嵌合凹部48の開放端側48Bは、当該嵌合凹部48の開放方向に行くに従って次第に窄まるように形成されている。   The fitting concave portion 48 of this modification is formed in a rectangular shape corresponding to the outer edge of the fitting convex portion 46, and the closed end side 48 </ b> A of the fitting concave portion 48 is in the opening direction of the fitting concave portion 48. It is formed to gradually widen as it goes. Furthermore, the open end 48B of the fitting recess 48 is formed so as to gradually narrow as it goes in the opening direction of the fitting recess 48.

以上説明した本変形例では、嵌合凸部46の先端側46Bが、即ち、嵌合凸部46における外側接触部C1及び内側接触部C2よりも周方向一方側の部位が次第に窄まるように形成されていることにより、嵌合凸部46における外側接触部C1及び内側接触部C2よりも周方向一方側の部位の肉厚を確保することができる。これにより、嵌合凸部46における外側接触部C1及び内側接触部C2よりも周方向他方側の部位の変形が抑制され、少ない圧入代であっても各々の分割コア12の連結力を確保することができる。すなわち、少ない圧入代であっても環状に配列された分割コア12の形状を保持することができる。また、嵌合凸部46における外側接触部C1及び内側接触部C2よりも周方向他方側の部位の変形が抑制されていることにより、一の分割コア12の連結部34と他の分割コア12の連結部34との間に形成されるエアギャップを小さくすることができ、これによりステータコア10内部における磁気損失を抑制することができる。   In the present modification described above, the distal end side 46B of the fitting convex portion 46, that is, the portion on one side in the circumferential direction from the outer contact portion C1 and the inner contact portion C2 of the fitting convex portion 46 is gradually narrowed. By forming, the thickness of the site | part of the circumferential direction one side rather than the outer side contact part C1 and the inner side contact part C2 in the fitting convex part 46 is securable. Thereby, the deformation | transformation of the site | part of the other side of the circumferential direction rather than the outer side contact part C1 and the inner side contact part C2 in the fitting convex part 46 is suppressed, and the connection force of each division | segmentation core 12 is ensured even if there is little press allowance. be able to. That is, the shape of the split cores 12 arranged in a ring shape can be maintained even with a small press-fitting allowance. Moreover, the deformation | transformation of the site | part of the other side of the circumferential direction rather than the outer side contact part C1 and the inner side contact part C2 in the fitting convex part 46 is suppressed, and the connection part 34 of one division | segmentation core 12 and the other division | segmentation core 12 The air gap formed between the connecting portion 34 and the connecting portion 34 of the stator core 10 can be reduced, thereby suppressing magnetic loss in the stator core 10.

(第2変形例に係る嵌合凸部及び嵌合凹部)
次に、図10を用いて上記実施形態の第2変形例に係る嵌合凸部及び嵌合凹部について説明する。なお、上記実施形態及び第1変形例と同一の機能を有する部分については上記実施形態等で用いた符号と同一の符号を付してその説明を省略する。
(Fitting convex part and fitting concave part which concern on 2nd modification)
Next, the fitting convex part and fitting concave part which concern on the 2nd modification of the said embodiment are demonstrated using FIG. In addition, about the part which has the same function as the said embodiment and a 1st modification, the code | symbol same as the code | symbol used in the said embodiment etc. is attached | subjected, and the description is abbreviate | omitted.

図10に示されるように、本変形例の嵌合凸部50は、軸方向視で略魚尾形状に形成されており、また嵌合凸部50の周方向の中間は径方向に括れている。また、嵌合凸部50の基端側50Aは、即ち、嵌合凸部50における括れ部36Aよりも周方向他方側の部位は、嵌合凸部50の突出方向に行くに従って次第に窄まるように形成されている。さらに、嵌合凸部50の周方向の中間部50Bは、即ち、嵌合凸部50における括れ部36Aよりも周方向一方側の部位は、嵌合凸部50の突出方向に行くに従って次第に拡幅するように形成されている。なお、嵌合凸部50の基端側50Aにおける周方向他方側の端の幅W1は、括れ部36Aの幅W2よりも広く設定されている。また、嵌合凸部50の先端側50Cは、即ち、嵌合凸部50における中間部50Bよりも周方向一方側の部位は、嵌合凸部50の突出方向に行くに従って次第に窄まるように形成されている。   As shown in FIG. 10, the fitting convex part 50 of this modification is formed in a substantially fishtail shape when viewed in the axial direction, and the middle in the circumferential direction of the fitting convex part 50 is constricted in the radial direction. . Further, the base end side 50 </ b> A of the fitting convex portion 50, i.e., the portion on the other side in the circumferential direction from the constricted portion 36 </ b> A of the fitting convex portion 50 gradually narrows as it goes in the protruding direction of the fitting convex portion 50. Is formed. Furthermore, the intermediate portion 50B in the circumferential direction of the fitting convex portion 50, that is, the portion on the one side in the circumferential direction from the constricted portion 36A in the fitting convex portion 50 is gradually widened in the protruding direction of the fitting convex portion 50. It is formed to do. Note that the width W1 of the other end in the circumferential direction on the base end side 50A of the fitting convex portion 50 is set wider than the width W2 of the constricted portion 36A. Further, the front end side 50C of the fitting convex portion 50, that is, the portion on the one side in the circumferential direction from the intermediate portion 50B of the fitting convex portion 50 is gradually narrowed in the protruding direction of the fitting convex portion 50. Is formed.

本変形例の嵌合凹部52は、上記嵌合凸部50の外縁に対応する縁部が魚尾形状に形成されており、この嵌合凹部52の閉止端側52Aは、当該嵌合凹部52の開放方向に行くに従って次第に拡幅するように形成されている。さらに、嵌合凹部52の周方向の中間部52Bは、当該嵌合凹部52の開放方向に行くに従って次第に窄まるように形成されている。また、嵌合凹部52の開放端側52Cは、当該嵌合凹部52の開放方向に行くに従って次第に拡幅するように形成されている。   The fitting recess 52 of this modification is formed in a fishtail shape at the edge corresponding to the outer edge of the fitting projection 50, and the closed end side 52 </ b> A of the fitting recess 52 is It is formed so as to gradually widen in the opening direction. Furthermore, the intermediate portion 52B in the circumferential direction of the fitting recess 52 is formed so as to gradually narrow in the opening direction of the fitting recess 52. The open end side 52C of the fitting recess 52 is formed so as to gradually widen in the opening direction of the fitting recess 52.

以上説明した本変形例では、嵌合凸部50における外側接触部C1及び内側接触部C2よりも周方向一方側の部位が次第に窄まるように形成されていると共に、嵌合凹部52における外側接触部C1及び内側接触部C2よりも周方向他方側が次第に拡幅するように形成されている。当該設定とすることにより、嵌合凸部50の先端側50C及び嵌合凹部52の開放端側52Cの周縁部の肉厚を確保することができる。その結果、少ない圧入代で環状に配列された分割コア12の形状を保持することができると共にステータコア10内の磁気損失を抑制することができる。   In the present modification described above, the outer peripheral contact portion C1 and the inner contact portion C2 of the fitting convex portion 50 are formed so as to be gradually narrowed in the circumferential direction, and the outer contact portion of the fitting concave portion 52 is contacted. It is formed so that the other side in the circumferential direction is gradually wider than the part C1 and the inner contact part C2. With this setting, it is possible to ensure the thickness of the peripheral edge portions of the distal end side 50C of the fitting convex portion 50 and the open end side 52C of the fitting concave portion 52. As a result, it is possible to maintain the shape of the split cores 12 arranged in a ring with a small press-fitting allowance and to suppress magnetic loss in the stator core 10.

なお、本発明は電機子コアとしてのロータコアに適用することもできる。本発明が適用されたロータコアでは、当該ロータコアを構成する複数の分割コアの形状(配列)を保持することができると共に当該ロータコア内の磁気損失を抑制することができる。   The present invention can also be applied to a rotor core as an armature core. In the rotor core to which the present invention is applied, the shape (arrangement) of a plurality of divided cores constituting the rotor core can be maintained and magnetic loss in the rotor core can be suppressed.

(第3変形例に係る嵌合凸部)
次に、第3変形例に係る嵌合凸部について説明する。なお、上記実施形態、第1変形例及び第2変形例と同一の機能を有する部分については上記実施形態等で用いた符号と同一の符号を付してその説明を省略する。
(Fitting convex part which concerns on 3rd modification)
Next, the fitting convex part which concerns on a 3rd modification is demonstrated. In addition, about the part which has the same function as the said embodiment, a 1st modification, and a 2nd modification, the code | symbol same as the code | symbol used in the said embodiment etc. is attached | subjected, and the description is abbreviate | omitted.

本変形例では、連結部34の周方向一方側に設けられた第1嵌合凸部108と、周方向他方側に設けられた第2嵌合凸部110とが嵌合することによって複数の分割コア12が環状に配列されていることに特徴がある。具体的には、周方向一方側に設けられた第1嵌合凸部108は、連結部34の径方向内側の部位から周方向一方側に向けて突出しており、周方向他方側に設けられた第2嵌合凸部110は、連結部34の径方向外側の部位から周方向他方側に向けて突出している。また、第1嵌合凸部108の径方向外側の部位は、第2嵌合凸部110側に向けて突出する第1突出部108Aとされており、第2嵌合凸部110の径方向内側の部位は、第1嵌合凸部108側に向けて突出する第2突出部110Aとされている。   In the present modification, a plurality of first fitting projections 108 provided on one side in the circumferential direction of the connecting portion 34 and a second fitting projection 110 provided on the other side in the circumferential direction are fitted to each other. It is characterized in that the divided cores 12 are arranged in an annular shape. Specifically, the first fitting protrusion 108 provided on one side in the circumferential direction protrudes from the radially inner portion of the connecting portion 34 toward one side in the circumferential direction, and is provided on the other side in the circumferential direction. The second fitting protrusion 110 protrudes from the radially outer portion of the connecting portion 34 toward the other circumferential side. In addition, the radially outer portion of the first fitting convex portion 108 is a first protruding portion 108A that protrudes toward the second fitting convex portion 110 side, and the radial direction of the second fitting convex portion 110 is The inner portion is a second protrusion 110A that protrudes toward the first fitting protrusion 108 side.

シャフト14(図示省略)が複数の分割コア12の軸心部に圧入された状態で、第1嵌合凸部108の第1突出部108Aと第2嵌合凸部110の第2突出部110Aとが接触部C3で接触することによって複数の分割コア12の周方向への移動が規制されている。   In a state where the shaft 14 (not shown) is press-fitted into the axial center portion of the plurality of split cores 12, the first protrusion 108A of the first fitting protrusion 108 and the second protrusion 110A of the second fitting protrusion 110. Contact with each other at the contact portion C3, the movement of the plurality of split cores 12 in the circumferential direction is restricted.

また、第1嵌合凸部108及び第2嵌合凸部110は、両者の接触部C3において各々の突出方向(周方向)に向けて次第に拡幅していると共に、第1嵌合凸部108及び第2嵌合凸部110は、接触部C3よりも各々の突出方向(周方向)の先端側において次第に窄まるように形成されている。   In addition, the first fitting convex portion 108 and the second fitting convex portion 110 are gradually widened in the protruding direction (circumferential direction) at the contact portion C3 of the both, and the first fitting convex portion 108 is also present. And the 2nd fitting convex part 110 is formed so that it may narrow gradually in the front end side of each protrusion direction (circumferential direction) rather than the contact part C3.

以上説明した本変形例では、第1嵌合凸部108及び第2嵌合凸部110における接触部C3よりも各々の突出方向の先端側が次第に窄まるように形成されていることにより、当該窄まるように形成された部位の肉厚を確保することができる。これにより、当該部位の変形が抑制され、少ない圧入代であっても各々の分割コア12の連結力を確保することができる。すなわち、少ない圧入代であっても環状に配列された分割コアの形状を保持することができる。また、当該部位の変形が抑制されることにより、一の分割コア12の連結部34と他の分割コア12の連結部34との間に形成されるエアギャップを小さくすることができ、これによりステータコア10内部における磁気損失を抑制することができる。   In the present modification described above, the first fitting convex portion 108 and the second fitting convex portion 110 are formed so that the front end side in each protruding direction is gradually narrowed relative to the contact portion C3. The thickness of the part formed so that it may be able to be ensured can be ensured. Thereby, the deformation | transformation of the said site | part is suppressed and the connection force of each division | segmentation core 12 can be ensured even if there is little press-fitting allowance. That is, the shape of the divided cores arranged in a ring shape can be maintained even with a small press-fitting allowance. Further, by suppressing the deformation of the part, the air gap formed between the connecting portion 34 of one divided core 12 and the connecting portion 34 of the other divided core 12 can be reduced. Magnetic loss in the stator core 10 can be suppressed.

なお、本変形例では、第1嵌合凸部108及び第2嵌合凸部110における接触部C3よりも先端側を各々の突出方向に向けて次第に窄まるように形成した例について説明してきたが、本発明はこれに限定されるものではない。例えば、第1嵌合凸部108及び第2嵌合凸部110のどちらか一方の先端側を窄まるように形成することもできる。   In addition, in this modification, the example which formed so that the front end side rather than the contact part C3 in the 1st fitting convex part 108 and the 2nd fitting convex part 110 might narrow gradually toward each protrusion direction has been demonstrated. However, the present invention is not limited to this. For example, it can also be formed so that one of the first fitting convex part 108 and the second fitting convex part 110 is narrowed.

以上、本発明の一実施形態について説明したが、本発明は、上記に限定されるものでなく、その主旨を逸脱しない範囲内において上記以外にも種々変形して実施することが可能であることは勿論である。   Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

10…ステータコア(電機子コア),12…分割コア,14…シャフト(芯部材),30…ティース部,34…連結部,36…嵌合凸部(第1嵌合凸部),36D…嵌合凸部側突出部(第1突出部),46…嵌合凸部(第1嵌合凸部),50…嵌合凸部(第1嵌合凸部),104…外側嵌合凸部(第2嵌合凸部),104C…外側嵌合凸部側突出部(第2突出部),106…内側嵌合凸部(第2嵌合凸部),106A…内側嵌合凸部側突出部(第2突出部),C1…外側接触部(接触部),C2…内側接触部(接触部),C3…接触部 DESCRIPTION OF SYMBOLS 10 ... Stator core (armature core), 12 ... Split core, 14 ... Shaft (core member), 30 ... Teeth part, 34 ... Connection part, 36 ... Fitting convex part (1st fitting convex part), 36D ... Fitting Joint convex side protruding part (first protruding part), 46 ... fitting convex part (first fitting convex part), 50 ... fitting convex part (first fitting convex part), 104 ... outer fitting convex part (Second fitting convex part), 104C ... outside fitting convex part side projecting part (second projecting part), 106 ... inside fitting convex part (second fitting convex part), 106A ... inside fitting convex part side Projection (second projection), C1 ... outer contact part (contact part), C2 ... inner contact part (contact part), C3 ... contact part

Claims (4)

径方向に延在されたティース部と、前記ティース部の径方向内側に設けられた連結部と、前記連結部の周方向一方側の端部に設けられ、周方向一方側に突出する第1嵌合凸部と、前記連結部の周方向他方側の端部に設けられ、周方向他方側に突出する第2嵌合凸部と、を有する複数の分割コアと、
一の前記分割コアの前記第1嵌合凸部が周方向に隣接する他の前記分割コアの前記第2嵌合凸部に嵌合されることによって環状に配列された前記複数の分割コアの軸心部に圧入される芯部材と、
を備え、
前記第1嵌合凸部は、前記第2嵌合凸部側に向けて突出する第1突出部を備えていると共に、前記第2嵌合凸部は、前記第1嵌合凸部側に向けて突出する第2突出部を備えており、
前記芯部材が前記複数の分割コアの軸心部に圧入された状態で、前記第1突出部と前記第2突出部とが接触部で接触することによって前記複数の分割コアの周方向への移動が規制されており、
前記第1嵌合凸部及び前記第2嵌合凸部は、前記接触部において各々の突出方向に向けて次第に拡幅していると共に、前記第1嵌合凸部及び前記第2嵌合凸部の少なくともいずれか一方は、前記接触部よりも各々の突出方向の先端側において次第に窄まるように形成されており、
前記連結部の周方向他方側の端部の径方向への寸法が該連結部の周方向の中間部の径方向への寸法よりも大きく設定されており、
前記第2嵌合凸部は、前記接触部より突出方向の先端側において次第に窄まるように形成されており、
前記第2嵌合凸部は、外側嵌合凸部及び該外側嵌合凸部よりも径方向内側に配置された内側嵌合凸部を含み、前記外側嵌合凸部の径方向外側の部位は、径方向外側へ向けて突出すると共に軸方向から見て三角形状に形成されている電機子コア。
A teeth portion extending in the radial direction, a connecting portion provided on the radially inner side of the teeth portion, and a first protruding at one end in the circumferential direction provided at an end portion on one circumferential side of the connecting portion. A plurality of split cores having a fitting convex portion and a second fitting convex portion provided at an end portion on the other circumferential side of the connecting portion and projecting to the other circumferential side;
The plurality of divided cores arranged in an annular shape by fitting the first fitting convex portion of one of the divided cores with the second fitting convex portion of the other divided core adjacent in the circumferential direction. A core member press-fitted into the shaft center,
With
The first fitting convex portion includes a first protruding portion that projects toward the second fitting convex portion side, and the second fitting convex portion is disposed on the first fitting convex portion side. A second projecting portion projecting toward the
In a state where the core member is press-fitted into the axial center portion of the plurality of divided cores, the first projecting portion and the second projecting portion are in contact with each other at the contact portion, so that the circumferential direction of the plurality of split cores is increased. Movement is restricted,
The first fitting convex portion and the second fitting convex portion are gradually widened toward the respective protruding directions at the contact portion, and the first fitting convex portion and the second fitting convex portion. At least any one of is formed so as to gradually squeeze on the tip side in each protruding direction from the contact portion,
The dimension in the radial direction of the end portion on the other circumferential side of the connecting portion is set larger than the dimension in the radial direction of the intermediate portion in the circumferential direction of the connecting portion ,
The second fitting convex portion is formed so as to be gradually narrowed on the tip side in the projecting direction from the contact portion,
The second fitting convex portion includes an outer fitting convex portion and an inner fitting convex portion disposed radially inward of the outer fitting convex portion, and a radially outer portion of the outer fitting convex portion. Is an armature core that protrudes radially outward and is formed in a triangular shape when viewed from the axial direction .
前記第1嵌合凸部は、前記接触部よりも各々の突出方向の先端側において次第に窄まるように形成されている請求項1記載の電機子コア。 2. The armature core according to claim 1, wherein the first fitting convex portion is formed so as to be gradually narrowed at a distal end side in each projecting direction from the contact portion. 前記連結部の周方向他方側には一対の前記第2嵌合凸部が設けられており、
一の前記分割コアの前記第1嵌合凸部が他の前記分割コアの前記一対の第2嵌合凸部の間に嵌合されることによって前記複数の分割コアが環状に配列されており、
前記芯部材が前記複数の分割コアの軸心部に圧入された状態で、前記第1嵌合凸部と前記一対の第2嵌合凸部とが、2箇所の前記接触部で接触することによって、前記複数の分割コアの周方向への移動が規制されている請求項1又は請求項2記載の電機子コア。
A pair of second fitting convex portions are provided on the other circumferential side of the connecting portion,
The plurality of divided cores are arranged in an annular shape by fitting the first fitting convex portion of one of the divided cores between the pair of second fitting convex portions of the other divided core. ,
The first fitting convex portion and the pair of second fitting convex portions are in contact with each other at the two contact portions in a state where the core member is press-fitted into the axial center portion of the plurality of split cores. The armature core according to claim 1, wherein movement of the plurality of divided cores in the circumferential direction is restricted by the armature.
前記外側嵌合凸部の径方向外側の端は、環状に配列された複数の前記分割コアの軸心部に前記芯部材が圧入された状態において、一の前記分割コアのティース部の中心線と他の前記分割コアのティース部の中心線とを周方向に二等分する二等分線上に位置している請求項1〜請求項3のいずれか1項に記載の電機子コア。A radially outer end of the outer fitting convex portion is a center line of the tooth portion of one of the split cores in a state where the core member is press-fitted into the axial center portions of the plurality of split cores arranged in an annular shape. The armature core according to any one of claims 1 to 3, wherein the armature core is located on a bisector that bisects the center line of the teeth portion of the other divided core and the other in the circumferential direction.
JP2013238073A 2013-11-18 2013-11-18 Armature core Active JP6313572B2 (en)

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