JP4292369B2

JP4292369B2 - Fastening structure and fastening method of solid member having hole and cylindrical member

Info

Publication number: JP4292369B2
Application number: JP2003030171A
Authority: JP
Inventors: 友和内山; 純一池田; 博志菊地; 敏伸山崎
Original assignee: Nidec Servo Corp
Current assignee: Nidec Servo Corp
Priority date: 2003-02-07
Filing date: 2003-02-07
Publication date: 2009-07-08
Anticipated expiration: 2023-02-07
Also published as: JP2004242449A

Description

【０００１】
【産業上の利用分野】
本発明は、孔を有する固体部材と該固体部材の孔に貫挿される円筒部材、例えば外転形回転電機の固定子鉄心と軸受箱を形成する円筒部材との締結構造及び締結方法に関する。
【０００２】
【従来の技術】
【特許文献１】
発明の名称；孔を有する固体部材と円筒部材の締結構造と締結方法
特開２０００−３５４３５５号公報
【０００３】
例えば、外転形回転電機の固定子で、固定子鉄心と、固定子を保持し軸受箱を形成する円筒部材との締結手段は、軸受箱の内径寸法への影響を排除するために接着固定が一般的で、また他の用途例での円筒部材の剛性が充分な構成では圧入固定も採用されている。これらの構成は、化学物質の取扱いでの、環境や、作業における時間管理・温度管理等での煩わしさ、また、圧入による固着手段での、所定の圧入代を得るための寸法管理に難点を伴う等改善を求められていた。
【０００４】
そして、その改善策として本願出願人は、上記引用する特開２０００‐３５４３５５号公報に詳述し、その一実施例を示す図５に見るように、固体部材内周面に嵌入される円筒部材を、径方向に拡開容易な形状として、当該円筒部材内周面への鋼球押しこみにより円筒部材外周面を拡開変形させ、該拡開変形での固体部材内周面との圧接を固定保持手段とする提案により、化学物質の取扱いでの、環境や、作業における時間管理・温度管理等での煩わしさ、また、圧入による固着手段での、所定の圧入代を得るための寸法管理の難しさ等の解消では前進を見せている。
【０００５】
【発明が解決しようとする課題】
上述の如き改善された従来の構成は、接着や圧入での締結手段を無用としたものの、円筒部外周面の一部の拡開変形と、これに対応する固体部材内周面との圧接による締結であることから、むしろ当該固体部材内周面が平滑な状態においては、特に間欠動作を繰り返す回転機等での締結手段としては、固着・締結力の更なる増加が期待事項となって来た。
【０００６】
【課題を解決するための手段】
本発明に成る孔を有する固体部材と円筒部材との締結構造は、固体部材の内周面が任意の数の凹陥部を備え、前記円筒部材が、その外周面の、前記固体部材内周面の凹陥部に対応する部位の少なくも１箇所に、近接して軸方向に並ぶ周方向の溝による周方向凸部を備え、また、好ましくは前記外周面の軸方向に並ぶ周方向の溝に対応する部位の内周面に、軸心向きの周方向凸部を備え、該円筒部材内周面の拡開に伴う前記外周面の凸部の拡開変形部が前記固体部材内周面の凹陥部に嵌入するように構成され、
【０００７】
好ましくは、前記円筒部材内周面に形成された軸心向きの周方向凸部は、少なくも一方の立ち上り端部が傾斜面を有し、前記円筒部材内周面に連接するように形成され、
【０００８】
また、上述固体部材は、例えば巻線の巻装された固定子鉄心で、同じく円筒部材が該固定子鉄心に貫挿保持され軸受箱を形成する円筒部材であって、
【０００９】
上述締結手段を実現するための製法は、
前記固体部材の孔に前記円筒部材を貫挿する工程と、該貫挿した状態で、前記円筒部材内周面もしくは軸心向きの周方向凸部に、該内周面の径もしくは軸心向き周方向凸部の内径より大きな外径寸法の硬質部材を貫通させ、もしくはその外径が拡開可能な棒状冶具を挿入して該棒状冶具を拡開することにより、内面を拡開させ、当該円筒部材外周面の周方向の溝部近傍を拡開変形して、該変形部を固定部材内周面の凹陥部に嵌入せしめる工程とを有する。
【００１０】
【実施例】
以下図面によって本発明の実施例を説明する。
【００１１】
図１および図２は、外転型回転機の固定子鉄芯と軸受箱を形成し筐体の一部を成す円筒部材との締結に係る例で、いずれも図３に示す固定子鉄芯に対応する本願発明の締結手段を示すものである。
【００１２】
そして、図３に示す固定子鉄芯は、電磁鋼鈑の積層体で、通常周方向の磁気平衡への配慮から磁極基準でずらし積みされることは、上述従来技術における図４に示すものと同じであって、図に見るように、その内周に、積層のガイドとなる軸方向に貫通する一つ溝の他に、図示の例では３個の、積層方向で部分的に形成される別の凹陥部が形成される点が異なる。
【００１３】
上述固定子鉄芯内周面の凹陥部は、図３の例では同図（ａ）に見るように積層鉄芯の中央部位で所定枚数に亘って一体的に形成することを善しとするが、その場所や大きさは任意に選択できるものである。
【００１４】
図１の例では、上記固定子鉄芯内周面の略中央部位に凹陥部が形成されており、また、円筒部材には、図５に示すように、その外周面に前記固定子鉄芯の凹陥部の両端部に対応する部位に夫々円周方向の溝が形成され、この両溝に対応する内周面側に軸心方向に突出した周方向凸部が形成されている。
【００１５】
そして、台に直立するように保持された上述円筒部材は、その外周面に、固体部材である巻線の捲装された固定子鉄芯が嵌入・保持され、該嵌着状態での締結のため、前記円筒部材の上端から、該円筒部材の内周面を拡開する為、硬質棒状部材が押しこまれる。
【００１６】
該硬質棒状部材の押しこみによって、円筒部材の内周面に形成された周方向凸部が拡開・変形して外周面側に及び、この変形部分が固定子鉄芯の内周面凹陥部に食いこむことで締結が完結するように構成されるものである。
【００１７】
図１の例では円筒部材の拡開・変形手段として円錐状の先端を有する棒状部材を使用しているが、球状を成すものでの押しこみでも可能である。
【００１８】
図２は別の例で、図６に見るように円筒部材内周面には軸心方向に突出する周方向凸部が無く、外周面側には上述第１の例と同様に固定子鉄芯の凹陥部の両端部に対応する部位に夫々円周方向の溝が形成されている。
【００１９】
該構成では、円筒部材内周面の拡開・変形手段として、当該円筒部材を固定・保持する台と一体を成す、該円筒部材内周面に嵌入する先端部が複数に分割されており、この分割部が上部から挿入される押し棒冶具で拡開されることで、拡開・変形して外周面側に及び、この変形部分が固定子鉄芯の内周面凹陥部に食いこむことで締結が完結するように構成されるものである。
【００２０】
【発明の効果】
本発明に成る締結構造は、作業上の簡便さと共に、当該円筒部材の他の部位での変形を回避でき、而も信頼性の高い極めて有効な締結手段を実現できる。
【図面の簡単な説明】
【図１】本発明に成る例の固体部材と円筒部材の締結手段を示す説明図である。
【図２】本発明に成る第２の例の固体部材と円筒部材の締結手段を示す説明図である。
【図３】本発明に係る固体部材の例を示す断面図と正面図である。
【図４】従来技術に係る固体部材の例を示す断面図と正面図である。
【図５】図１の例の円筒部材の断面図である。
【図６】図２の例の円筒部材の断面図である。
【図７】従来技術に成る例の固体部材と円筒部材の締結手段を示す説明図である。
【符号の説明】
１固体部材（固定子鉄芯）
１−１孔
１−２位置決め用の溝
１−３凹陥部
２円筒部材
２−１内周面
２−１１軸心向きの周方向凸部
２−１１１傾斜面
２−２外周面
２−２１周方向の溝
２−２２周方向凸部
３台
３−１円筒部材内周面への嵌入部
３−１１分割された線端部
３−２鋼球の通路
４押し棒
５巻線
６鋼球[0001]
[Industrial application fields]
The present invention relates to a fastening structure and a fastening method between a solid member having a hole and a cylindrical member that is inserted into the hole of the solid member, for example, a stator core of an outer rotation type rotating electrical machine and a cylindrical member that forms a bearing box.
[0002]
[Prior art]
[Patent Document 1]
Title of invention; Fastening structure and fastening method of solid member having cylindrical hole and cylindrical member Japanese Patent Laid-Open No. 2000-354355
For example, in a stator of an abduction type rotating electrical machine, the fastening means between the stator core and the cylindrical member that holds the stator and forms the bearing box is bonded and fixed to eliminate the influence on the inner diameter of the bearing box In general, and in a configuration in which the cylindrical member has sufficient rigidity in another application example, press-fitting is also employed. These configurations have difficulties in handling chemical substances in the environment, inconvenience in time management and temperature management in work, and in dimensional management to obtain a predetermined press-fitting allowance for fixing means by press-fitting. There was a need for improvement.
[0004]
Then, as an improvement measure, the applicant of the present application describes in detail in the above-cited Japanese Patent Application Laid-Open No. 2000-354355, and as shown in FIG. 5 showing one embodiment thereof, the cylindrical member inserted into the inner peripheral surface of the solid member. Is formed into a shape that is easy to expand in the radial direction, and the outer peripheral surface of the cylindrical member is expanded and deformed by pushing a steel ball into the inner peripheral surface of the cylindrical member, and the pressure contact with the inner peripheral surface of the solid member in the expanding deformation is performed. Proposal of fixing and holding means, bothering the environment and time management and temperature management in handling chemical substances, and dimensional control to obtain a predetermined press-fitting allowance for fixing means by press-fitting We are making progress in solving the difficulties.
[0005]
[Problems to be solved by the invention]
Although the conventional structure improved as described above eliminates the need for fastening means for adhesion or press-fitting, it is based on the expansion of a part of the outer peripheral surface of the cylindrical portion and the pressure contact with the corresponding inner peripheral surface of the solid member. In the state where the inner peripheral surface of the solid member is smooth, a further increase in the fixing / fastening force is expected as a fastening means in a rotating machine or the like that repeats intermittent operation. It was.
[0006]
[Means for Solving the Problems]
According to the fastening structure of the solid member having a hole and the cylindrical member according to the present invention, the inner peripheral surface of the solid member has an arbitrary number of recessed portions, and the cylindrical member has the outer peripheral surface of the solid member inner peripheral surface. And at least one portion corresponding to the concave portion is provided with a circumferential convex portion by a circumferential groove arranged in the axial direction adjacent to the concave portion, and preferably in a circumferential groove arranged in the axial direction of the outer peripheral surface. The inner peripheral surface of the corresponding part is provided with a circumferential convex portion facing the axial center, and the expanding deformation portion of the convex portion of the outer peripheral surface accompanying the expansion of the inner peripheral surface of the cylindrical member is the inner peripheral surface of the solid member. It is configured to fit into the recess,
[0007]
Preferably, the circumferential convex portion facing the axial center formed on the inner peripheral surface of the cylindrical member is formed such that at least one rising end portion has an inclined surface and is connected to the inner peripheral surface of the cylindrical member. ,
[0008]
Further, the above-mentioned solid member is, for example, a stator core in which a winding is wound, and a cylindrical member is similarly inserted and held in the stator core to form a bearing box,
[0009]
The manufacturing method for realizing the fastening means is as follows:
The step of inserting the cylindrical member into the hole of the solid member, and in the inserted state, the inner peripheral surface of the cylindrical member or the circumferential convex portion in the axial direction is directed to the diameter or axial direction of the inner peripheral surface. By penetrating a hard member having an outer diameter larger than the inner diameter of the circumferential convex portion, or by inserting a rod-shaped jig whose outer diameter can be expanded to expand the rod-shaped jig, the inner surface is expanded. Expanding and deforming the vicinity of the circumferential groove on the outer circumferential surface of the cylindrical member, and fitting the deformed portion into the recessed portion on the inner circumferential surface of the fixing member.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 and FIG. 2 are examples relating to fastening of a stator iron core of an abduction type rotating machine and a cylindrical member forming a bearing box and forming a part of a housing, both of which are shown in FIG. The fastening means of this invention corresponding to this is shown.
[0012]
And the stator iron core shown in FIG. 3 is a laminated body of electromagnetic steel plates, and is normally shifted and stacked on the basis of the magnetic pole from the consideration of the magnetic balance in the circumferential direction as shown in FIG. As shown in the figure, in the illustrated example, three grooves are partially formed in the stacking direction in addition to one groove penetrating in the axial direction as a guide for stacking on the inner periphery. The difference is that another recess is formed.
[0013]
In the example of FIG. 3, the concave portion of the inner surface of the stator iron core described above is preferably formed integrally over a predetermined number at the central portion of the laminated iron core as seen in FIG. However, the location and size can be arbitrarily selected.
[0014]
In the example of FIG. 1, a concave portion is formed in a substantially central portion of the inner peripheral surface of the stator core, and the stator core is formed on the outer peripheral surface of the cylindrical member as shown in FIG. 5. Circumferential grooves are respectively formed at portions corresponding to both end portions of the recessed portion, and circumferential convex portions protruding in the axial direction are formed on the inner peripheral surface side corresponding to both the grooves.
[0015]
The cylindrical member held so as to stand upright on the base is fitted and held on the outer peripheral surface thereof with a stator iron core fitted with a winding which is a solid member, and is fastened in the fitted state. Therefore, the hard bar-like member is pushed in from the upper end of the cylindrical member to expand the inner peripheral surface of the cylindrical member.
[0016]
Due to the indentation of the hard rod-shaped member, the circumferential convex portion formed on the inner peripheral surface of the cylindrical member expands and deforms to reach the outer peripheral surface side, and this deformed portion is the inner peripheral surface recessed portion of the stator core. It is configured so that the conclusion is completed by digging into the.
[0017]
In the example of FIG. 1, a rod-shaped member having a conical tip is used as the means for expanding and deforming the cylindrical member, but it is also possible to push in a spherical member.
[0018]
FIG. 2 shows another example. As shown in FIG. 6, the cylindrical member inner peripheral surface has no circumferential convex portion protruding in the axial direction, and the outer peripheral surface side is similar to the first example in the stator iron. Circumferential grooves are respectively formed at portions corresponding to both ends of the recessed portion of the core.
[0019]
In this configuration, as a means for expanding and deforming the inner circumferential surface of the cylindrical member, a tip portion that is integrated with a base for fixing and holding the cylindrical member and is fitted into the inner circumferential surface of the cylindrical member is divided into a plurality of parts. When this split part is expanded by a push rod jig inserted from above, it expands and deforms to reach the outer peripheral surface side, and this deformed part bites into the inner peripheral surface recessed part of the stator core. It is comprised so that fastening may be completed by.
[0020]
【The invention's effect】
The fastening structure according to the present invention can not only be easily operated but also avoid deformation at other parts of the cylindrical member, and can realize highly effective fastening means with high reliability.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a fastening means for a solid member and a cylindrical member according to an example of the present invention.
FIG. 2 is an explanatory view showing a fastening means for a solid member and a cylindrical member according to a second example of the present invention.
FIG. 3 is a cross-sectional view and a front view showing an example of a solid member according to the present invention.
FIG. 4 is a cross-sectional view and a front view showing an example of a solid member according to the prior art.
FIG. 5 is a cross-sectional view of the cylindrical member of the example of FIG.
6 is a cross-sectional view of the cylindrical member of the example of FIG.
FIG. 7 is an explanatory view showing a fastening means for a solid member and a cylindrical member according to an example of the prior art.
[Explanation of symbols]
1 Solid member (stator core)
1-1 Hole 1-2 Positioning Groove 1-3 Recessed Part 2 Cylindrical Member 2-1 Inner Peripheral Surface 2-11 Axial Oriented Circumferential Protrusion 2-111 Inclined Surface 2-2 Outer Peripheral Surface 2-21 Directional groove 2-22 circumferential convex part 3 stand 3-1 fitting part 3-11 into cylindrical member inner peripheral surface divided line end part 3-2 steel ball passage 4 push rod 5 winding 6 steel ball

Claims

In a fastening structure of a solid member having a hole and a cylindrical member inserted through the hole of the solid member, the inner peripheral surface of the solid member includes an arbitrary number of recessed portions, and the cylindrical member has an outer peripheral surface. The at least one portion corresponding to the concave portion of the solid member is provided with a circumferential convex portion corresponding to a circumferential groove arranged in the axial direction in close proximity, and the cylindrical member has an inner peripheral surface that is expanded. A solid member having a hole and a cylindrical member, wherein the expanding and deforming portion of the convex portion of the outer peripheral surface is configured to be a fastening means by being fitted into the concave portion of the inner peripheral surface of the solid member; Fastening structure.

2. The hole according to claim 1, wherein the cylindrical member includes an axially-oriented circumferential convex portion on an inner circumferential surface of a portion corresponding to a circumferential groove aligned in the axial direction of the outer circumferential surface. A fastening structure of a solid member having a cylindrical shape and a cylindrical member.

The axially-oriented circumferential convex portion formed on the inner peripheral surface of the cylindrical member is formed so that at least one rising end has an inclined surface and is connected to the inner peripheral surface of the cylindrical member. The fastening structure of a solid member having a hole and a cylindrical member according to claim 2.

The solid member is a stator core wound with windings, and the cylindrical member is a cylindrical member that is inserted and held in the stator core to form a bearing box. A fastening structure between the stator core and the bearing box of the external rotating electric machine according to any one of the above.

In order to fasten and fix the solid member having a hole with an inner peripheral surface having an arbitrary number of recesses and the cylindrical member inserted through the hole of the solid member,
The step of inserting the cylindrical member into the hole of the solid member, and in the inserted state, the inner peripheral surface of the cylindrical member or the circumferential convex portion in the axial direction is directed to the diameter or axial direction of the inner peripheral surface. By inserting a hard member having an outer diameter larger than the inner diameter of the circumferential convex portion, or by inserting a rod-shaped jig whose outer diameter can be expanded to expand the rod-shaped jig, the inner surface is expanded. A step of expanding and deforming the vicinity of a circumferential groove portion of the outer peripheral surface of the cylindrical member, and fitting the deformed portion into a recessed portion of the inner peripheral surface of the fixing member, and a solid member having a hole and the cylindrical member The fastening method.