JPH0649077Y2 - Small rotating electric machine rotor - Google Patents
Small rotating electric machine rotorInfo
- Publication number
- JPH0649077Y2 JPH0649077Y2 JP3551689U JP3551689U JPH0649077Y2 JP H0649077 Y2 JPH0649077 Y2 JP H0649077Y2 JP 3551689 U JP3551689 U JP 3551689U JP 3551689 U JP3551689 U JP 3551689U JP H0649077 Y2 JPH0649077 Y2 JP H0649077Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- electric machine
- magnet
- rotating electric
- small rotating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920003023 plastic Polymers 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000011800 void material Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 9
- 241000239290 Araneae Species 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案はたとえば，小形のステッピングモータまたは同
期電動機等の小形回転電機（小形電動機）の回転子の改
良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to improvement of a rotor of a small rotating electric machine (small electric motor) such as a small stepping motor or a synchronous motor.
［従来の技術］ 従来のこの種回転電機の回転子としては，大別して第２
図，第３図に示すようなものがあった。[Prior Art] The rotor of this type of conventional rotary electric machine is roughly classified into a second rotor.
There were those as shown in Fig. 3 and Fig. 3.
第１の従来例のものは第２図に示すように，回転子軸１
を外周に環状溝2aを設けたスパイダ２に圧入等により取
り付け，回転子軸１と同心となるように環状溝2aに環状
のプラスチックスマグネット３をインサートモールドす
る，又はスパイダ２の環状溝2aにプラスチックスマグネ
ット２をインサートモールドして後，これらと同心とな
るようにスパイダ２に回転子軸１を圧入等により取り付
け，回転子４を構成していた。The first conventional example has a rotor shaft 1 as shown in FIG.
Is attached to the spider 2 having an annular groove 2a on its outer periphery by press fitting or the like, and the annular plastic magnet 3 is insert-molded in the annular groove 2a so as to be concentric with the rotor shaft 1, or the annular groove 2a of the spider 2 is attached. After the plastic magnet 2 was insert-molded, the rotor shaft 1 was attached to the spider 2 by press fitting or the like so as to be concentric with the plastic magnet 2 to form the rotor 4 .
また，第２に従来例のものは，第３図に示すように，ス
パイダ部分5aとマグネット部分5bとが一体的に形成され
たマグネット５に回転子軸１をインサートするよう直接
モールド（直接成形）により両者を一体化し，回転子６
を構成するようにしていた。Secondly, as shown in FIG. 3, in the second conventional example, a direct molding (direct molding) is performed so that the rotor shaft 1 is inserted into the magnet 5 in which the spider portion 5a and the magnet portion 5b are integrally formed. ) And the rotor 6
Was configured.
なお,1aは回転子軸の略中央部に設けた回り止めの凹凸
面である。Incidentally, reference numeral 1a denotes an anti-rotation concave-convex surface provided in a substantially central portion of the rotor shaft.
［考案が解決しようとする課題］ ところで，第２図に示す第１の従来例のものでは，次の
問題点があった。[Problems to be Solved by the Invention] However, the first conventional example shown in FIG. 2 has the following problems.
肉厚が薄くなっているスパイダ２の上方角部において
クラック７を生じ易い。A crack 7 is likely to occur at the upper corner of the spider 2 having a thin wall thickness.
このクラック７はスパイダ２とマグネット３の結合力
を弱めるので，マグネット３を脱落させ，界磁極の機能
を喪失する恐れがあった。Since the crack 7 weakens the coupling force between the spider 2 and the magnet 3, the magnet 3 may be dropped and the function of the field pole may be lost.
また，第３図に示す第２の従来例のものでは，次の問題
点があった。Further, the second conventional example shown in FIG. 3 has the following problems.
スパイダ5aの回転子軸１に対する取り付け部に相当す
るブッシュ部分5a′にクラック８を生じ易い。A crack 8 is likely to occur in the bush portion 5a 'corresponding to the attachment portion of the spider 5a to the rotor shaft 1.
このクラックが生じると，マグネット５の回転子軸１
に対する締結力を弱めるので，回転子軸１のトルクがマ
グネット５に伝達されず，空転する恐れがあった。When this crack occurs, the rotor shaft 1 of the magnet 5
Since the fastening force for the rotor is weakened, the torque of the rotor shaft 1 is not transmitted to the magnet 5 and there is a risk of idling.
さらに，上記２つの従来例とも，樹脂成形時の収縮歪み
の吸収機能を有しないことに基づくクラックも生じる恐
れがあった。Furthermore, in both of the above-mentioned two conventional examples, there is a risk that cracks may occur due to the absence of the function of absorbing shrinkage strain during resin molding.
本考案は上記の課題（問題点）を解決するようにした小
形回転電機の回転子を提供することを目的とする。An object of the present invention is to provide a rotor for a small rotating electric machine that solves the above problems (problems).
［課題を解決するための手段］ 本考案の小形回転電機の回転子は，上記課題を解決する
ために，回転子軸に取り付けられた当該ブッシュ体の外
周部に軸方向の切欠溝を１個または複数個形成し，これ
らの切欠溝を覆って略環状に形成されるようにプラスチ
ックスマグネットを一体的に成形固着するように構成し
た。[Means for Solving the Problem] In order to solve the above-mentioned problems, the rotor of a small rotating electric machine according to the present invention has one axial notch groove on the outer peripheral portion of the bush body attached to the rotor shaft. Alternatively, a plurality of plastic magnets are integrally formed and fixed so as to cover the cutout grooves and have a substantially annular shape.
この場合，切欠溝の深さをプラスチックスマグネットの
径方向の肉厚よりも長くなるように設定し，各切欠溝内
に空隙部を生じるように構成するのが望ましい。In this case, it is desirable that the depth of the notch groove is set to be longer than the radial thickness of the plastic magnet, and a void portion is formed in each notch groove.
また，切欠溝は外周方向に等間隔に形成するようにした
小形回転電機の回転子とすることが望ましい。Further, it is desirable that the notch grooves are rotors of a small rotating electric machine formed at equal intervals in the outer peripheral direction.
［実施例］ 以下第１図に示す一実施例に基き本発明を具体的に説明
する。[Embodiment] The present invention will be specifically described based on an embodiment shown in FIG.
本考案では，概括的には第１図（イ）および（ロ）に示
すようなブッシュ体９に対して同図（ハ）〜（ヘ）に示
すような環状の成型品であるマグネット10を一体成形し
て回転子11（マグネットロータ）を構成している。In the present invention, generally, a magnet 10 which is a ring-shaped molded product as shown in FIGS. 1 (c) to 1 (f) is attached to a bush body 9 as shown in FIGS. 1 (a) and 1 (b). The rotor 11 (magnet rotor) is formed by integral molding.
まず，ブッシュ体９はその外周上にマグネット10の径方
向の肉厚よりも長い深さとなるように軸方向に形成した
複数個（実施例では４個）の切欠溝9a〜9dと中心部に回
転子軸１に嵌入するための取付孔9eを設けて成り，これ
はプレスまたはモールド等の方法で製作される。First, the bush body 9 has a plurality of (four in the embodiment) notched grooves 9a to 9d formed in the axial direction on the outer periphery thereof so as to have a depth longer than the radial thickness of the magnet 10 and the central portion. It is provided with a mounting hole 9e for fitting into the rotor shaft 1, which is manufactured by a method such as pressing or molding.
これらの切欠溝9a〜9dは外周方向に等間隔に形成するよ
うにした方がバランス上望ましい。It is desirable in terms of balance that these notch grooves 9a to 9d be formed at equal intervals in the outer peripheral direction.
このブッシュ体９（その孔9e部分）を回転子軸１に対し
てその凹凸面1aの部分で嵌入（凹凸面を形成しない場合
には圧入）して取り付け，ブッシュ体９の切欠溝9a〜9d
の部分を含めて切欠溝の深さよりも径方向の長さが短い
肉厚となる略環状となるマグネット10を成形にて一体的
に取り付ける。The bush body 9 (the hole 9e portion thereof) is fitted into the rotor shaft 1 at the portion of the uneven surface 1a (press fit when the uneven surface is not formed) and attached, and the cutout grooves 9a to 9d of the bush body 9 are attached.
A substantially annular magnet 10 having a wall thickness that is shorter than the depth of the notch groove in the radial direction including the portion is integrally attached by molding.
即ち，マグネット10は希土類粉末等を使用したいわゆる
プラスチックスマグネットとし，ブッシュ体９と交叉し
ない部分では第１図（ホ）に示すように断面が完全な環
状となるが，一方，ブッシュ体９と交叉する部分では第
１図（ヘ）に示すように４個のマグネット部分10a〜10d
を切欠溝相互間に存在するブッシュ体部分9fを結合して
一体成形しているものである。That is, the magnet 10 is a so-called plastic magnet using rare earth powder or the like, and the portion not intersecting with the bush body 9 has a complete annular cross section as shown in FIG. At the intersecting portion, as shown in FIG. 1 (f), four magnet portions 10a to 10d are provided.
The bush body portions 9f existing between the cutout grooves are joined together and integrally molded.
なお，前述のように切欠溝9a〜9dの深さはこれに挿入さ
れるマグネット10部分の肉厚よりも長くなるように設定
されているので，各切欠溝の部分で空隙部G1〜G4を生じ
ることになる。As described above, since the depths of the cutout grooves 9a to 9d are set to be longer than the wall thickness of the magnet 10 portion to be inserted therein, the gap portions G 1 to G are formed in the cutout groove portions. Will result in 4 .
［作用］ 本考案の回転子（マグネットロータ）11は上記のように
構成され，図示しない固定子側からの回転トルクを受け
て回転するが，前述のように空隙部G1〜G4が存在するの
で，この部分でプラスチックスマグネット10が冷却した
場合に生じる歪みは吸収される。[Operation] The rotor (magnet rotor) 11 of the present invention is configured as described above and rotates by receiving the rotational torque from the stator side (not shown), but has the gaps G 1 to G 4 as described above. Therefore, the distortion generated when the plastic magnet 10 is cooled at this portion is absorbed.
また，ブッシュ体９の部分は有効磁界の観点から見た場
合には無効磁界となる領域のため，従来のもののように
高価なマグネット材料，磁性材料を使用しなくて良いの
で，強度を重点に各種の材料のもので構成できるから，
この材料の選択によってブッシュ体９従って回転子11の
慣性モーメントを調整することができる。Further, since the bush body 9 is a region which becomes an ineffective magnetic field when viewed from the viewpoint of the effective magnetic field, it is not necessary to use expensive magnet materials or magnetic materials unlike the conventional ones, and therefore strength is emphasized. Because it can be composed of various materials,
By selecting this material, the moment of inertia of the bush 9 and thus of the rotor 11 can be adjusted.
［考案の効果］ 本考案の小形回転電機の回転子では，回転子軸に取り付
けられた当該ブッシュ体の外周部に１個または複数個の
切欠溝を形成し，この切欠溝の部分を挟んで略環状に形
成されるようにプラスチックスマグネットを一体的に成
形固着するように構成しているので，次のような優れた
効果を有する。[Effects of the Invention] In the rotor of the small rotating electric machine of the present invention, one or a plurality of cutout grooves are formed in the outer peripheral portion of the bush body attached to the rotor shaft, and the cutout groove portions are sandwiched therebetween. Since the plastic magnet is integrally molded and fixed so as to be formed in a substantially annular shape, it has the following excellent effects.
ブッシュ体とプラスチックスマグネットとの結合はブ
ッシュ体に形成した複数個の切欠溝の部分を介してプラ
スチックスマグネットを一体成形で固定しているため，
両者の固着は強固であり，プラスチックスマグネットが
脱落することはない。Since the bush body and the plastic magnet are fixed by integrally molding the plastic magnet through a plurality of notched grooves formed in the bush body,
Both are firmly fixed and the plastic magnet does not fall off.
この場合，ブッシュ体は第１の従来例に比べ，肉厚が
薄くなる上方角部はなくなるのでこの部分で生じ易いク
ラックも生じるおそれはないし， また第２の従来例のように高価なプラスチックスマグネ
ットをスパイダー部分に延長させることもないので，材
料費は大幅に節約できる。In this case, since the bush body does not have the upper corner portion where the wall thickness is thinner than that of the first conventional example, there is no possibility of cracks that are likely to occur at this portion, and the expensive plastic material as in the second conventional example is not generated. Since the magnet is not extended to the spider part, the material cost can be greatly saved.
さらに，ブッシュ体の切欠溝の深さをこれに装着され
るプラスチックスマグネットの厚さよりも長くとり，空
隙部を形成させるようにしたものでは，この部分でプラ
スチックスマグネットが冷却した場合に生じる歪みは吸
収されるので，従来この歪みのために生じていたクラッ
クも防止できるようになった。Furthermore, in the case where the depth of the notch groove of the bush body is set to be longer than the thickness of the plastic magnet attached to it, and a gap is formed, the distortion generated when the plastic magnet is cooled at this portion. Since it is absorbed, it is now possible to prevent the cracks that were conventionally caused by this distortion.
ブッシュ体はモールドやプレス成形で安価に製作で
き，この材質を適用品に応じて変えることにより回転子
の慣性モーメントを容易に調整できるから，特にステッ
ピングモータ用としては有用であるThe bush can be manufactured at low cost by molding or press molding, and the moment of inertia of the rotor can be easily adjusted by changing this material according to the application product, so it is particularly useful for stepping motors.
第１図は本考案の一実施例を示すもので，その内同図
（イ）は本考案を適用したブッシュ体の側面図，同図
（ロ）は同図（イ）のＡ−Ｂ′線における断面図，同図
（ハ）〜（ヘ）はこのブッシュ体にマグネットを嵌着し
た後回転子軸も圧入して回転子として組み立てた状態を
示すもので，その内，（ハ）は同図Ａ−Ａ′線における
断面図，（ニ）は同図Ｂ−Ｂ′線における断面図，
（ホ）は同図（ハ）のＣ−Ｃ′線における断面図，
（ヘ）は同図（ニ）のＤ−Ｄ′線における断面図であ
る。 また，第２図および第３図はそれぞれ第１および第２の
従来例を示すもので，各図の（イ）は縦断正面図，各図
（ロ）は側面図である。 1:回転子軸、9:回転子 9a〜9d:切欠溝、G1〜G4：空隙部 10:プラスチックスマグネット、11：回転子FIG. 1 shows an embodiment of the present invention, in which FIG. 1 (a) is a side view of a bush body to which the present invention is applied, and FIG. 1 (b) is AB 'in FIG. 1 (a). The cross-sectional views along the line, and (c) to (c) of the figure show a state in which a magnet is fitted to the bush body and then the rotor shaft is also press-fitted to be assembled as a rotor. A sectional view taken along the line A-A 'in the figure, (d) is a sectional view taken along the line BB' in the figure,
(E) is a cross-sectional view taken along the line CC 'of FIG.
(F) is a sectional view taken along the line DD 'in FIG. Further, FIGS. 2 and 3 show first and second conventional examples, respectively, in which (a) is a vertical sectional front view and (b) is a side view. 1: a rotor shaft, 9: rotor 9a to 9d: notched groove, G 1 ~G 4: gap portion 10: Plastics magnet 11: rotor
Claims (3)
の外周部に軸方向の切欠溝を１個または複数個形成し，
これらの切欠溝を覆って略環状に形成されるようにプラ
スチックスマグネットを一体的に成形固着するようにし
たことを特徴とする小形回転電機の回転子。1. A single axial cutout groove or a plurality of axial cutout grooves are formed on the outer peripheral portion of the bush attached to the rotor shaft.
A rotor for a small rotating electric machine, characterized in that a plastic magnet is integrally molded and fixed so as to be formed in a substantially annular shape so as to cover these notch grooves.
の径方向の肉厚よりも長くなるように設定し，各切欠溝
内に空隙部を生じるようにした請求項１記載の小形回転
電機の回転子。2. The small rotating electric machine according to claim 1, wherein the depth of the notch groove is set to be longer than the wall thickness of the plastic magnet in the radial direction, and a void is formed in each notch groove. Rotor.
にした請求項１記載の小形回転電機の回転子。3. The rotor for a small rotating electric machine according to claim 1, wherein the notch grooves are formed at equal intervals in the outer peripheral direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3551689U JPH0649077Y2 (en) | 1989-03-30 | 1989-03-30 | Small rotating electric machine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3551689U JPH0649077Y2 (en) | 1989-03-30 | 1989-03-30 | Small rotating electric machine rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02129150U JPH02129150U (en) | 1990-10-24 |
| JPH0649077Y2 true JPH0649077Y2 (en) | 1994-12-12 |
Family
ID=31540942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3551689U Expired - Fee Related JPH0649077Y2 (en) | 1989-03-30 | 1989-03-30 | Small rotating electric machine rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0649077Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4703282B2 (en) * | 2005-06-17 | 2011-06-15 | トヨタ自動車株式会社 | Rotating electrical machine rotor |
-
1989
- 1989-03-30 JP JP3551689U patent/JPH0649077Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02129150U (en) | 1990-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |