JPH05276716A - Method of assembling revolving-field type rotor - Google Patents

Method of assembling revolving-field type rotor

Info

Publication number
JPH05276716A
JPH05276716A JP4098775A JP9877592A JPH05276716A JP H05276716 A JPH05276716 A JP H05276716A JP 4098775 A JP4098775 A JP 4098775A JP 9877592 A JP9877592 A JP 9877592A JP H05276716 A JPH05276716 A JP H05276716A
Authority
JP
Japan
Prior art keywords
permanent magnet
fitted
guide
outer peripheral
peripheral surface
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.)
Pending
Application number
JP4098775A
Other languages
Japanese (ja)
Inventor
Masatoshi Sunaga
昌利 須永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsuba Corp
Original Assignee
Mitsuba Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsuba Electric Manufacturing Co Ltd filed Critical Mitsuba Electric Manufacturing Co Ltd
Priority to JP4098775A priority Critical patent/JPH05276716A/en
Publication of JPH05276716A publication Critical patent/JPH05276716A/en
Pending legal-status Critical Current

Links

Landscapes

  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

PURPOSE:To prevent the separation of the surface-treated layer of a permanent magnet, which occurs when press-fitting the cylindrical cover along the inside surface of the guide piece surrounding permanent magnet, in the manufacture process of a brushless motor. CONSTITUTION:Four permanent magnets 15 are arranged on the outside surface of the yoke core and the end core 14 incorporated on a rotary shaft 3. Guides 16 are arranged, respectively, on the outside surface of these permanent magnets 15. And, a cylindrical cover 17 is set and press-fit along the outside surface of the guide 16. At this time, since the guide 16 and the cylindrical cover 17 only slide on each other, the surface-treated layer of the permanent magnet 15 does not exfoliate.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は回転界磁形ロータの組立
方法に関し、特に円筒カバーにより永久磁石を外囲する
形式の回転界磁形ロータの組立方法に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a rotating field type rotor, and more particularly to a method for assembling a rotating field type rotor in which a permanent magnet is surrounded by a cylindrical cover.

【0002】[0002]

【従来の技術】従来、ブラシレスモータは、回転軸に嵌
装された永久磁石をロータとしているため、この永久磁
石が、モータの高速回転に伴う遠心力により飛散や破壊
をしたり、繰り返し急加減速により破壊し易い欠点が問
題視されている。そこで、永久磁石の固定には種々な方
法が取られていて、例えば、永久磁石をステンレス等の
円筒カバーで外囲することで、永久磁石の飛散、破壊等
を防止する方法が一般的に採用されている。
2. Description of the Related Art Conventionally, since a brushless motor uses a permanent magnet fitted to a rotating shaft as a rotor, the permanent magnet is scattered or destroyed by centrifugal force caused by high-speed rotation of the motor, or is repeatedly subjected to rapid application. There is a problem that it is easily damaged by deceleration. Therefore, various methods are used to fix the permanent magnets. For example, a method of preventing the permanent magnets from scattering and breaking by enclosing the permanent magnet with a cylindrical cover made of stainless steel or the like is generally adopted. Has been done.

【0003】しかしながら、上述の方法によりロータを
組立てる際に、円筒カバーを、回転軸に嵌装された永久
磁石の外周面に沿って、圧入または軽圧入するため、永
久磁石と円筒カバーとの摺接により、永久磁石の外周面
に傷が発生し易い。一般に、永久磁石としてのネオジウ
ム−鉄系磁石には、防錆のために表面処理が施されてお
り、前記傷により防錆効果が阻害され、永久磁石の磁気
特性及び強度が落ちることとなるため、組立方法の改良
が望まれている。
However, when the rotor is assembled by the above-described method, the cylindrical cover is press-fitted or slightly press-fitted along the outer peripheral surface of the permanent magnet fitted to the rotating shaft, so that the permanent magnet and the cylindrical cover are slid. The contact easily causes scratches on the outer peripheral surface of the permanent magnet. Generally, a neodymium-iron-based magnet as a permanent magnet is subjected to surface treatment for rust prevention, and the scratches impede the rust prevention effect, resulting in a decrease in magnetic characteristics and strength of the permanent magnet. The improvement of the assembling method is desired.

【0004】[0004]

【発明が解決しようとする課題】このような従来技術の
問題点に鑑み、本発明の主な目的は、円筒カバーを、ブ
ラシレスモータの回転軸に嵌装された永久磁石の外周面
に沿って嵌装圧入する際に、永久磁石の外周面に傷が発
生しない回転界磁形ロータの組立方法を提供することに
ある。
In view of the problems of the prior art, the main object of the present invention is to provide a cylindrical cover along the outer peripheral surface of a permanent magnet fitted to the rotating shaft of a brushless motor. It is an object of the present invention to provide a method for assembling a rotating field type rotor, in which the outer peripheral surface of the permanent magnet is not damaged when it is press-fitted.

【0005】[0005]

【課題を解決するための手段】上述した目的は本発明に
よれば、円環状薄板を積層して円筒形をなすヨークコア
と、全体として円筒状をなすように前記ヨークコアを外
囲する複数の円弧状永久磁石片と、前記永久磁石片を外
囲する円筒カバーとを、回転軸に嵌装してなる回転界磁
形ロータの組立方法であって、前記ヨークコアの外周面
上に前記永久磁石片を配置し、かつ該永久磁石片の外周
面上に、薄板からなり、かつ該永久磁石片の外周面と略
同一の輪郭形状を有するガイドを配置し、前記円筒カバ
ーを、前記ヨークコアに嵌装された前記永久磁石片に対
して、該永久磁石片を外囲する前記ガイドの外周面に沿
って、嵌装圧入することを特徴とする回転界磁形ロータ
の組立方法を提供することにより達成される。
According to the present invention, the above-mentioned object is achieved by stacking annular thin plates to form a cylindrical yoke core, and a plurality of circles surrounding the yoke core so as to form a cylindrical shape as a whole. A method for assembling a rotating field type rotor, wherein an arc-shaped permanent magnet piece and a cylindrical cover that surrounds the permanent magnet piece are fitted to a rotating shaft, the permanent magnet piece being provided on an outer peripheral surface of the yoke core. And a guide having a contour shape substantially the same as the outer peripheral surface of the permanent magnet piece is arranged on the outer peripheral surface of the permanent magnet piece, and the cylindrical cover is fitted to the yoke core. The present invention is achieved by providing a method for assembling a rotary field type rotor, characterized in that the permanent magnet piece is fitted and press-fitted along the outer peripheral surface of the guide that surrounds the permanent magnet piece. To be done.

【0006】[0006]

【作用】このようにすれば、円筒カバーを、永久磁石に
嵌装されたガイドの外周面に沿って嵌装圧入する方法な
ので、永久磁石の表面はどの部材とも摺接することがな
いため、永久磁石の表面処理層が剥離することはない。
According to this structure, since the cylindrical cover is fitted and press-fitted along the outer peripheral surface of the guide fitted to the permanent magnet, the surface of the permanent magnet does not come into sliding contact with any member. The surface treatment layer of the magnet does not peel off.

【0007】[0007]

【実施例】以下、本発明の好適実施例を添付の図面につ
いて詳しく説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

【0008】図1は、本発明が適用されたブラシレスモ
ータ1の構造を示しており、このブラシレスモータ1
は、回転界磁形のロータ2が内側に配置されたインナロ
ータ形である。ロータ2の回転軸3の図の右側部分は、
図示しない負荷が取付けられるフランジ4に固設された
玉軸受5により軸支され、図の左側部分は、モータ1の
端板としてのエンドブラケット6に固設された玉軸受7
により軸支されてる。
FIG. 1 shows the structure of a brushless motor 1 to which the present invention is applied.
Is an inner rotor type in which a rotor 2 of a rotating field type is arranged inside. The right part of the rotary shaft 3 of the rotor 2 in the drawing is
A ball bearing 5 fixed to a flange 4 to which a load (not shown) is mounted is pivotally supported, and the left side of the figure is a ball bearing 7 fixed to an end bracket 6 as an end plate of the motor 1.
Is pivotally supported by.

【0009】回転軸3の図の左側には、ロータ2の回転
位置と回転速度とを検出するセンサ8が、回転軸3と同
一軸上にカップリング9を介して設けられている。
A sensor 8 for detecting the rotational position and the rotational speed of the rotor 2 is provided on the left side of the rotary shaft 3 in the figure, on the same axis as the rotary shaft 3 via a coupling 9.

【0010】円筒形のヨークとして磁路の一部をなすフ
レーム10は、フランジ4とエンドブラケット6との間
に挟持されて固定されている。フレーム10の内周面に
は、ステータとしての電機子鉄心11が固定されてお
り、この電機子鉄心11の内周に設けられた図示しない
スロットには、電流線路としての電機子巻線12が納め
られている。
A frame 10 which forms a part of a magnetic path as a cylindrical yoke is sandwiched and fixed between the flange 4 and the end bracket 6. An armature core 11 as a stator is fixed to the inner peripheral surface of the frame 10, and an armature winding 12 as a current line is provided in a slot (not shown) provided in the inner periphery of the armature core 11. Has been paid.

【0011】図2〜図4にロータ2の内部構造について
詳しく示す。回転軸3の中央部近傍には、軸線方向にセ
レーション状の溝が施されており、この溝部分に、薄肉
円筒状の鋼板を軸線方向に積み重ねて形成したヨークと
してのヨークコア13が嵌装されている。このヨークコ
ア13の軸線方向両端部には、ヨークコア13よりやや
小径であって、しかも半径方向外向き突部14aを有す
る、薄肉円筒状の鋼板を軸線方向に数枚重ねて形成した
エンドコア14が、回転軸3に嵌装されている。
2 to 4 show the internal structure of the rotor 2 in detail. A serration-shaped groove is formed in the axial direction near the center of the rotary shaft 3, and a yoke core 13 as a yoke formed by stacking thin-walled cylindrical steel plates in the axial direction is fitted in the groove portion. ing. At both ends of the yoke core 13 in the axial direction, an end core 14 formed by stacking several thin-walled cylindrical steel plates in the axial direction having a diameter slightly smaller than that of the yoke core 13 and having radially outwardly projecting portions 14a is formed. It is fitted on the rotary shaft 3.

【0012】界磁としての永久磁石15は、或る長さの
円筒体を約80度の角度範囲に渡って切り出した形状を
なす4片の永久磁石からなり、かつその表裏に形成され
たNS極が交互するように、ヨークコア13及びエンド
コア14の外周面に、隣接する永久磁石15間に所定の
間隙を有するように配置されている。この永久磁石15
には、ネオジウム−鉄系磁石が採用されているが、この
磁石は磁気特性に優れている反面、酸化し易い欠点があ
るため、その表面に防錆処理が施されている。
The permanent magnet 15 as a field magnet is composed of four pieces of permanent magnets each having a shape in which a cylindrical body of a certain length is cut out over an angle range of about 80 degrees, and NS formed on the front and back sides thereof. The yoke core 13 and the end core 14 are arranged so that the poles alternate with each other so as to have a predetermined gap between the adjacent permanent magnets 15. This permanent magnet 15
Has adopted a neodymium-iron magnet, but this magnet has excellent magnetic characteristics, but has a drawback that it is easily oxidized, and therefore its surface is subjected to rust prevention treatment.

【0013】永久磁石15の外周面は、薄板からなるガ
イド16により覆われている。このガイド16の長手方
向側面及び一方の端面には、永久磁石15の長手方向側
面及び一方の端面と、略同一の形状をなすフランジ16
aが設けられている。永久磁石15は、焼結成形品であ
り、ロータ2の回転による遠心力により、永久磁石15
自身が破壊したり、エンドコア14から離脱したりする
ため、これらの防止用として、ガイド16の外周がステ
ンレス製の円筒カバー17により覆われている。
The outer peripheral surface of the permanent magnet 15 is covered with a guide 16 made of a thin plate. The longitudinal side surface and the one end surface of the guide 16 have substantially the same shape as the longitudinal side surface and the one end surface of the permanent magnet 15.
a is provided. The permanent magnet 15 is a sintered molded product, and the permanent magnet 15 is generated by centrifugal force generated by the rotation of the rotor 2.
The guide 16 is covered with a cylindrical cover 17 made of stainless steel so as to prevent them from breaking or detaching from the end core 14.

【0014】円筒カバー17の軸線方向両端部は、端部
方向から磁石が軸方向へ飛び出すのを防止するためのサ
イドプレート18R、18Lにより挟持されている。ま
た、一方のサイドプレート18Lは、円筒カバー17の
蓋板をもなしている。
Both end portions of the cylindrical cover 17 in the axial direction are sandwiched by side plates 18R and 18L for preventing the magnet from jumping out in the axial direction from the end portion direction. The one side plate 18L also serves as a cover plate for the cylindrical cover 17.

【0015】以下にロータ2の組立方法について説明す
る。まず、回転軸3の中央部近傍に設けられた溝に沿っ
て、ヨークコア13及びエンドコア14を嵌装圧入す
る。ここで、回転軸3とヨークコア13の外周面との同
軸精度を高めるため、ヨークコア13の外周面を研削加
工する。次に、4片の永久磁石15の外周面に、それぞ
れガイド16を接着する。そして、ヨークコア13及び
エンドコア14の外周面に、ガイド16の長手方向側端
面のフランジ16aが、突部14aと当接する位置に永
久磁石15を配置し接着固定する。ここまでの工程で、
ロータ2のインナ部が形成される。
The method of assembling the rotor 2 will be described below. First, the yoke core 13 and the end core 14 are press-fitted along the groove provided near the center of the rotary shaft 3. Here, in order to improve the coaxial accuracy between the rotary shaft 3 and the outer peripheral surface of the yoke core 13, the outer peripheral surface of the yoke core 13 is ground. Next, the guides 16 are adhered to the outer peripheral surfaces of the four pieces of permanent magnets 15, respectively. Then, on the outer peripheral surfaces of the yoke core 13 and the end core 14, the permanent magnet 15 is arranged and bonded and fixed at a position where the flange 16a of the end face in the longitudinal direction of the guide 16 contacts the protrusion 14a. In the process so far,
The inner portion of the rotor 2 is formed.

【0016】次に、ロータ2のアウタ部としての円筒カ
バー17を、インナ部に嵌装圧入する。つまり、円筒カ
バー17を、ガイド16の外周面に沿って嵌装圧入する
ことになる。最後に、サイドプレート18R、18L
を、回転軸3の軸線方向両端部より円筒カバー17を挟
持するよう、回転軸3に嵌装して、ロータ2が完成す
る。
Next, the cylindrical cover 17 as the outer portion of the rotor 2 is fitted and press-fitted into the inner portion. That is, the cylindrical cover 17 is fitted and press-fitted along the outer peripheral surface of the guide 16. Finally, the side plates 18R, 18L
Is fitted to the rotary shaft 3 so as to sandwich the cylindrical cover 17 from both ends in the axial direction of the rotary shaft 3, and the rotor 2 is completed.

【0017】上述の組立工程から明らかなように、アウ
タ部を、インナ部に嵌装圧入する際に、ガイド16の外
周面と円筒カバー17の内周面とが摺接するだけで、4
片の永久磁石15の表面は一切傷つかない。さらに、エ
ンドコア14の四方に設けられた突部14aと、ガイド
16の長手方向側端面のフランジ16aとを当接させる
ことにより、ロータ2の急な起動、停止等による永久磁
石15の空転を防止できる。また、ガイド16に設けら
れたフランジ16aにより、永久磁石15とガイド16
とが互いにずれることを防止できる。
As is apparent from the above-described assembly process, when the outer portion is fitted and press-fitted into the inner portion, the outer peripheral surface of the guide 16 and the inner peripheral surface of the cylindrical cover 17 are slidably brought into contact with each other.
The surface of one permanent magnet 15 is not damaged at all. Further, the protrusions 14a provided on the four sides of the end core 14 and the flange 16a on the end face in the longitudinal direction of the guide 16 are brought into contact with each other to prevent idling of the permanent magnet 15 due to sudden start and stop of the rotor 2. it can. Moreover, the permanent magnet 15 and the guide 16 are provided by the flange 16 a provided on the guide 16.
And can be prevented from shifting from each other.

【0018】尚、ガイド16を図5に示すように一体的
に成形すれば、部品点数が減ることから組立が容易に行
える等、組立の作業性が向上する他、ガイド自身の強度
を増すことができる。
If the guide 16 is integrally molded as shown in FIG. 5, the number of parts is reduced, so that the assembly can be easily carried out, and the workability of the assembly is improved and the strength of the guide itself is increased. You can

【0019】[0019]

【発明の効果】以上の説明により明らかなように、本発
明による回転界磁形ロータの組立方法によれば、円筒カ
バーを、永久磁石片の外周に配置されたガイドの外周面
に沿って嵌装圧入するので、永久磁石片と円筒カバーと
は直接摺接することがないため、永久磁石片の表面処理
層が傷つくことがない。従って、製造過程を何ら複雑化
することなく、永久磁石の表面処理層の剥離を簡単に回
避することができるので、従来の製造コストと大差な
く、高品質の回転界磁形ロータを提供することができ
る。
As is apparent from the above description, according to the method for assembling the rotating field type rotor of the present invention, the cylindrical cover is fitted along the outer peripheral surface of the guide arranged on the outer periphery of the permanent magnet piece. Since the permanent magnet piece and the cylindrical cover do not come into direct sliding contact with each other because they are press-fitted, the surface treatment layer of the permanent magnet piece is not damaged. Therefore, it is possible to easily avoid peeling of the surface treatment layer of the permanent magnet without complicating the manufacturing process, and to provide a rotating field type rotor of high quality, which is not much different from the conventional manufacturing cost. You can

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明が適用されたブラシレスモータの軸線に
沿って破断して示す図である。
FIG. 1 is a view showing a brushless motor to which the present invention is applied by being broken along an axis.

【図2】本発明が適用されたロータ構造を示す分解斜視
図である。
FIG. 2 is an exploded perspective view showing a rotor structure to which the present invention is applied.

【図3】図2のロータ構造を軸線に沿って破断して示す
図である。
FIG. 3 is a view showing the rotor structure of FIG. 2 broken along an axis.

【図4】図3のIV−IV線に沿って見た断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG.

【図5】本発明の他の例の要部を示す斜視図である。FIG. 5 is a perspective view showing a main part of another example of the present invention.

【符号の説明】[Explanation of symbols]

1 ブラシレスモータ 2 ロータ 3 回転軸 4 フランジ 5、7 玉軸受 6 エンドブラケット 8 センサ 9 カップリング 10 フレーム 11 電機子鉄心 12 電機子巻線 13 ヨークコア 14 エンドコア 14a 突部 15 永久磁石 16 ガイド 16a フランジ 17 円筒カバー 18R、18L サイドプレート 1 Brushless Motor 2 Rotor 3 Rotating Shaft 4 Flange 5, 7 Ball Bearing 6 End Bracket 8 Sensor 9 Coupling 10 Frame 11 Armature Core 12 Armature Winding 13 Yoke Core 14 End Core 14a Projection 15 Permanent Magnet 16 Guide 16a Flange 17 Cylindrical Cover 18R, 18L Side plate

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】円環状薄板を積層して円筒形をなすヨーク
コアと、全体として円筒状をなすように前記ヨークコア
を外囲する複数の円弧状永久磁石片と、前記永久磁石片
を外囲する円筒カバーとを、回転軸に嵌装してなる回転
界磁形ロータの組立方法であって、 前記ヨークコアの外周面上に前記永久磁石片を配置し、
かつ該永久磁石片の外周面上に、薄板からなり、かつ該
永久磁石片の外周面と略同一の輪郭形状を有するガイド
を配置し、 前記円筒カバーを、前記ヨークコアに嵌装された前記永
久磁石片に対して、該永久磁石片を外囲する前記ガイド
の外周面に沿って、嵌装圧入することを特徴とする回転
界磁形ロータの組立方法。
1. A yoke core having a cylindrical shape by laminating annular thin plates, a plurality of arc-shaped permanent magnet pieces surrounding the yoke core so as to form a cylindrical shape as a whole, and surrounding the permanent magnet piece. A cylindrical cover and a method for assembling a rotating field type rotor fitted to a rotating shaft, wherein the permanent magnet pieces are arranged on an outer peripheral surface of the yoke core,
A guide, which is made of a thin plate and has substantially the same contour shape as the outer peripheral surface of the permanent magnet piece, is arranged on the outer peripheral surface of the permanent magnet piece, and the cylindrical cover is fitted to the permanent magnet piece. A method for assembling a rotating field type rotor, characterized in that the permanent magnet piece is fitted and press-fitted along the outer peripheral surface of the guide that surrounds the permanent magnet piece.
JP4098775A 1992-03-24 1992-03-24 Method of assembling revolving-field type rotor Pending JPH05276716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4098775A JPH05276716A (en) 1992-03-24 1992-03-24 Method of assembling revolving-field type rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4098775A JPH05276716A (en) 1992-03-24 1992-03-24 Method of assembling revolving-field type rotor

Publications (1)

Publication Number Publication Date
JPH05276716A true JPH05276716A (en) 1993-10-22

Family

ID=14228754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4098775A Pending JPH05276716A (en) 1992-03-24 1992-03-24 Method of assembling revolving-field type rotor

Country Status (1)

Country Link
JP (1) JPH05276716A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018033241A (en) * 2016-08-24 2018-03-01 アスモ株式会社 Rotor, and method of manufacturing motor
JP2018033242A (en) * 2016-08-24 2018-03-01 アスモ株式会社 Rotor, and method of manufacturing motor
JP2019161959A (en) * 2018-03-16 2019-09-19 本田技研工業株式会社 Rotor
US11296563B2 (en) 2015-11-02 2022-04-05 Denso Corporation Rotor, motor, method for manufacturing rotor, and method for manufacturing motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11296563B2 (en) 2015-11-02 2022-04-05 Denso Corporation Rotor, motor, method for manufacturing rotor, and method for manufacturing motor
JP2018033241A (en) * 2016-08-24 2018-03-01 アスモ株式会社 Rotor, and method of manufacturing motor
JP2018033242A (en) * 2016-08-24 2018-03-01 アスモ株式会社 Rotor, and method of manufacturing motor
JP2019161959A (en) * 2018-03-16 2019-09-19 本田技研工業株式会社 Rotor

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