JPH08322230A - Cascade coil type stepping motor and its manufacture - Google Patents
Cascade coil type stepping motor and its manufactureInfo
- Publication number
- JPH08322230A JPH08322230A JP12864895A JP12864895A JPH08322230A JP H08322230 A JPH08322230 A JP H08322230A JP 12864895 A JP12864895 A JP 12864895A JP 12864895 A JP12864895 A JP 12864895A JP H08322230 A JPH08322230 A JP H08322230A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- stepping motor
- end winding
- bobbin
- side wall
- 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
Links
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、縦列コイル式ステッピ
ングモータ（以下、単にステッピングモータともいう）
及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cascade coil type stepping motor (hereinafter also simply referred to as a stepping motor).
And its manufacturing method.
【０００２】[0002]
【従来の技術】従来の４相縦列コイル式ステッピングモ
ータの一例を示す軸方向模式断面図を図８の（ａ）に示
す。リング状の左コア１０１及び右コア１０２でボビン
（図示せず）に巻装された相コイル１０３を挟んで１相
分のステータが形成され、非磁性輪板からなるスペーサ
１０４を挟んでこの１相分のステータを４相分、軸方向
に並べてステータ１００全体が形成される。１０５は左
コア１０１及び右コア１０２の内周面に形成される誘導
極であり、１０６はロータ、１０７はロータの外周面に
形成されるポール（誘導極又は永久磁石極）であり、１
０８は回転軸である。2. Description of the Related Art An axial schematic sectional view showing an example of a conventional four-phase tandem coil type stepping motor is shown in FIG. A ring-shaped left core 101 and a right core 102 sandwich a phase coil 103 wound around a bobbin (not shown) to form a stator for one phase, and a spacer 104 made of a non-magnetic wheel plate sandwiches the stator. The four stators for the phases are arranged in the axial direction for four phases to form the entire stator 100. Reference numeral 105 is an induction pole formed on the inner peripheral surfaces of the left core 101 and the right core 102, 106 is a rotor, and 107 is a pole (induction pole or permanent magnet pole) formed on the outer peripheral surface of the rotor.
Reference numeral 08 is a rotation axis.
【０００３】１相分のステータの一部破断分解斜視図を
図９に示し、そのボビン２００の軸方向断面図を図１０
に示す。ボビン２００は、相コイル１０３が巻装される
コイル収容溝２０１を有する輪板状の樹脂部材であっ
て、ボビン２００の側板部２０２から径外方向へ一体成
形によりホルダ部２０３が突設され、ホルダ部２０３に
は相コイル１０３の端部が巻付けられる一対のコイル端
巻付け端子２０４がインサート成形により固定されてい
る。FIG. 9 is a partially broken exploded perspective view of the stator for one phase, and FIG. 10 is an axial sectional view of the bobbin 200.
Shown in The bobbin 200 is a wheel-plate-shaped resin member having a coil housing groove 201 in which the phase coil 103 is wound, and a holder portion 203 is integrally formed from the side plate portion 202 of the bobbin 200 in a radially outward direction by projection. A pair of coil end winding terminals 204 around which the ends of the phase coil 103 are wound are fixed to the holder portion 203 by insert molding.
【０００４】実開平２ー１１４３７９号公報は、２相縦
列コイル式ステッピングモータにおいて、第１相のボビ
ンの一方の側板部から径外方向へ一体成形により形成さ
れた第１相用のホルダ部と、第２相のボビンの一方の側
板部から径外方向へ一体成形により形成された第２相の
ホルダ部とを軸方向に隣接させることにより、これら両
ホルダ部から突出するコネクタピンにコイル巻線の端部
を巻き付けることを提案している。Japanese Utility Model Laid-Open No. 2-114379 discloses a two-phase tandem coil type stepping motor, in which a first-phase holder is integrally formed radially outward from one side plate of a bobbin of the first phase. , By axially adjoining one side plate portion of the second-phase bobbin and the second-phase holder portion integrally formed in the radial direction in the radial direction, the coil pins are coil-wound around the connector pins protruding from the both holder portions. It proposes to wrap the ends of the wire.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記し
た公報のように２個のボビンを軸方向に連装する場合に
は両ホルダ部を隣接させてコネクタピン間の軸方向距離
を精密に設定することができるが、図８〜図１０に示し
た多連装形式の従来の縦列コイル式ステッピングモータ
では、多数の部材を軸方向に重ねる必要があり、各コネ
クタピンやコイル端巻付け端子間の軸方向距離や周方向
相対角度の累積公差が増大し、このために上記公報の２
連装形式のボビンの場合に比べてコネクタピンやコイル
端巻付け端子の接続の自動化が難化するという問題があ
った。However, when two bobbins are connected in the axial direction as in the above publication, both holder parts should be adjacent to each other to precisely set the axial distance between the connector pins. However, in the conventional cascade coil type stepping motor of the multiple mounting type shown in FIGS. 8 to 10, it is necessary to stack a large number of members in the axial direction, and the axial direction between each connector pin and the coil end winding terminal is increased. The cumulative tolerance of the distance and the relative angle in the circumferential direction increases, and for this reason, 2
There is a problem that automation of connection of the connector pin and the coil end winding terminal becomes difficult as compared with the case of the continuous type bobbin.
【０００６】特に、各コネクタピン間の相対位置のばら
つきは数十μｍ以下に抑えないと、相手側の雌コネクタ
との嵌合が困難となり、このために、図８〜図１０に示
した多連装形式の従来の縦列コイル式ステッピングモー
タでは、コネクタピンを異なる複数のボビンに分散する
という上記公報の手法を採用することは困難であった。
もし、無理にそれを行えば、それぞれコネクタピンを有
する複数のボビンの間の軸方向距離や周方向相対角度を
予め精密に位置合わせしておかねばならず、この位置合
わせ作業の負担が大きくなってしまう。In particular, if the variation in the relative position between the connector pins is suppressed to several tens of μm or less, it becomes difficult to mate with the female connector on the mating side. In the conventional serial coil type stepping motor of the serial type, it was difficult to adopt the method of the above publication in which the connector pins are distributed to a plurality of different bobbins.
If this is done forcibly, the axial distances and circumferential relative angles between the bobbins, each of which has a connector pin, must be precisely aligned in advance, which increases the burden of this alignment work. Will end up.
【０００７】次に、上記した図８〜図１０に示すような
従来の多連装形式の縦列コイル式ステッピングモータで
は、各相のステータコア間の周方向相対角度のばらつき
（公差）をできるだけ（例えばステータコアの各誘導極
（図示省略されている）の周方向ピッチの十分の一以下
に）低減する必要があるが、このような各相のステータ
コア間の周方向相対角度のばらつきの低減は簡単ではな
かった。Next, in the conventional multiple coil type cascade coil stepping motor as shown in FIGS. 8 to 10, the variation (tolerance) in the circumferential relative angle between the stator cores of each phase can be minimized (for example, the stator cores). However, it is not easy to reduce the variation in the relative angle in the circumferential direction between the stator cores of each phase. It was
【０００８】本発明は、上記問題点に鑑みなされたもの
であり、製造工程を複雑化することなくコネクタピンや
コイル端巻付け端子間の接続が容易な縦列コイル式ステ
ッピングモータ及びその製造方法を提供することをその
目的としている。また、本発明は、製造工程を複雑化す
ることなく各相のステータコアの各誘導極間の周方向相
対角度のばらつきを低減可能な縦列コイル式ステッピン
グモータ及びその製造方法を提供することを他の目的と
している。The present invention has been made in view of the above problems, and provides a tandem coil stepping motor and a method of manufacturing the same, which facilitates connection between connector pins and coil end winding terminals without complicating the manufacturing process. Its purpose is to provide. Another object of the present invention is to provide a tandem coil stepping motor capable of reducing the variation in the circumferential relative angle between the induction poles of the stator core of each phase without complicating the manufacturing process, and a method of manufacturing the same. Has an aim.
【０００９】[0009]
【課題を解決するための手段】本発明の第１の構成は、
コイル端巻付け端子が固定されるボビンに巻装されて軸
方向に配列されるとともに端部が前記コイル端巻付け端
子に巻付けられる多数の相コイルと、前記相コイルの両
側に配設されて径方向内端部が誘導極をなす一対の側板
部と前記相コイルの外周側にて前記両側壁部を磁気結合
する継鉄部とからなるとともに前記相コイルに等しい数
だけ配設される多数の対をなすステータコアと、外周面
が前記ステータコアの内端面に対面する回転自在のロー
タとを備える縦列コイル式ステッピングモータにおい
て、前記ボビンは、ロータが内部に回転自在に収容され
る電気絶縁性の円筒部と、前記円筒部と一体成形されて
なるとともに前記円筒部の外周面から径外方向へ輪板状
に多数並立される電気絶縁性の側壁部と、前記各側壁部
により前記円筒部の外周側に区画形成されて前記相コイ
ルを収容する多数のコイル収容溝と、前記コイル収容溝
の両側に形成されて前記ステータコアの前記側板部を相
対回動不能に保持する略環状のコア収容空間とを備え、
多数の前記コイル端巻付け端子は、互いに隣接する複数
の側壁部の外周の所定位置から所定の一方向へ平行に突
設されるとともにコネクタピンを兼ねることを特徴とす
る縦列コイル式ステッピングモータである。The first structure of the present invention is as follows.
The coil end winding terminals are wound around a fixed bobbin and arranged in the axial direction, and a plurality of phase coils whose ends are wound around the coil end winding terminals are arranged on both sides of the phase coil. And a pair of side plate portions whose inner ends in the radial direction form induction poles and yoke portions that magnetically couple the both side wall portions on the outer peripheral side of the phase coil and are arranged in the same number as the phase coils. In a tandem coil stepping motor including a plurality of pairs of stator cores and a rotatable rotor having an outer peripheral surface facing the inner end surface of the stator core, the bobbin has an electrically insulating property in which the rotor is rotatably housed therein. A cylindrical part, an electrically insulating side wall part that is integrally formed with the cylindrical part, and is arranged in a ring-like shape radially outward from the outer peripheral surface of the cylindrical part, and the cylindrical part by the side wall parts. of A large number of coil housing grooves that are partitioned and formed on the circumferential side to house the phase coils, and a substantially annular core housing space that is formed on both sides of the coil housing groove and holds the side plate portions of the stator core such that they cannot rotate relative to each other. With and
A tandem coil stepping motor, wherein a large number of the coil end winding terminals are provided so as to project in parallel from a predetermined position on the outer periphery of a plurality of side wall portions adjacent to each other in a predetermined direction and also serve as connector pins. is there.
【００１０】本発明の第２の構成は、上記第１の構成に
おいて更に、前記コネクタピンを持たない前記側壁部の
外周面から前記一方向へ突出して前記相コイルの端部が
巻付けられるコイル端巻付け端子を有し、互いに周方向
同一角度位置に突出する前記コネクタピン及び前記コイ
ル端巻付け端子は、軸方向に延設される導体棒により短
絡されることを特徴としている。A second structure of the present invention is the coil according to the first structure, wherein the end portion of the phase coil is wound so as to project from the outer peripheral surface of the side wall portion having no connector pin in the one direction. The connector pin and the coil end winding terminal, which have end winding terminals and project at the same angular position in the circumferential direction, are short-circuited by a conductor rod extending in the axial direction.
【００１１】本発明の第３の構成は、上記第１の構成の
縦列コイル式ステッピングモータの製造方法であって、
インサート成形により前記ステータコアの前記側板部を
前記ボビンと一体成形した後、前記相コイルを前記コイ
ル収容溝にそれぞれ個別に巻装することを特徴としてい
る。本発明の第４の構成は、上記第１の構成の縦列コイ
ル式ステッピングモータの製造方法であって、前記ボビ
ンを成形後、前記コア収容溝に前記ステータコアの前記
側板部を分割して相対回動不能に収容し、その後、前記
コイル収容溝に前記相コイルをそれぞれ個別に巻装する
ことを特徴としている。A third structure of the present invention is a method for manufacturing a cascade coil stepping motor having the above-mentioned first structure,
After the side plate portion of the stator core is integrally formed with the bobbin by insert molding, the phase coils are individually wound around the coil accommodating grooves. A fourth configuration of the present invention is the method for manufacturing the cascade coil type stepping motor of the first configuration, wherein after forming the bobbin, the side plate portion of the stator core is divided into the core accommodating grooves for relative rotation. It is characterized in that the phase coils are housed immovably and then the phase coils are individually wound in the coil housing grooves.
【００１２】本発明の第５の構成は、上記第１の構成の
縦列コイル式ステッピングモータの製造方法であって、
前記コネクタピン及び前記コイル端巻付け端子が、イン
サート成形により前記側壁部に固定されることを特徴と
している。本発明の第６の構成は、上記第１の構成の縦
列コイル式ステッピングモータの製造方法であって、前
記コネクタピン及び前記コイル端巻付け端子は、前記側
壁部に成形時に形成された孔に差し込まれて固定される
ことを特徴としている。A fifth structure of the present invention is a method for manufacturing the cascade coil type stepping motor having the above-mentioned first structure,
The connector pin and the coil end winding terminal are fixed to the side wall portion by insert molding. A sixth structure of the present invention is the method for manufacturing the cascade coil type stepping motor of the first structure, wherein the connector pin and the coil end winding terminal are provided in a hole formed in the side wall portion at the time of molding. It is characterized by being inserted and fixed.
【００１３】[0013]
【作用及び発明の効果】第１の構成の縦列コイル式ステ
ッピングモータでは、ステータコアが多数（本明細書で
は３個以上をいう）の相コイルを個別に囲包して各相コ
イル毎に独立の磁気回路を形成する。ボビンの円筒部の
外周面に並立された輪板状の側壁部は、多数のコイル収
容溝を区画形成し、各コイル収容溝に各相コイルが個別
に巻装されるとともにステータコアの継鉄部が収容され
る。コイル収容溝の軸方向両側にはステータコアの側板
部が最適位置にて回動不能に収容されるコア収容空間が
形成され、側板部の径方向内端部は誘導極すなわち相コ
イルにより励磁される磁極を構成する。そして、複数の
側壁部の外周面から一方向へ突出する多数のコネクタピ
ンは隣接する相コイルのコイル端巻付け端子を兼ねる。In the tandem coil type stepping motor of the first configuration, the stator core individually surrounds a large number of phase coils (referred to as three or more in this specification), and each phase coil is independent. Form a magnetic circuit. The wheel-plate-shaped side wall portion, which is juxtaposed on the outer peripheral surface of the cylindrical portion of the bobbin, forms a large number of coil accommodating grooves, and each phase coil is individually wound in each coil accommodating groove, and the yoke portion of the stator core Is housed. A core accommodating space is formed on both axial sides of the coil accommodating groove for accommodating the side plate portion of the stator core at the optimum position so that the side plate portion cannot rotate. Make up the magnetic poles. A large number of connector pins protruding in one direction from the outer peripheral surfaces of the plurality of side wall portions also serve as coil end winding terminals of the adjacent phase coils.
【００１４】このようにすれば、以下の作用効果を奏す
る。第１に、円筒部及び多数の側壁部からなる単一のボ
ビンにコネクタピンを固定するので、多数のボビンを軸
方向に並べて固定する場合に比較して、多数のコネクタ
ピンを互いに隣接する複数の側壁部の外周に分散配置し
ても各コネクタピン間の軸方向距離及び周方向相対角度
のばらつきを格段に低減することができる。すなわち、
このボビンにコネクタピンを固定するには、コネクタピ
ンをボビンとともにインサート成形するか、又は、ボビ
ンの側壁部の外周に設けた孔にコネクタピンを差し込ん
で固定することが考えられる。By doing so, the following operational effects are obtained. First, since the connector pins are fixed to a single bobbin including a cylindrical portion and a large number of side wall portions, a large number of connector pins that are adjacent to each other are provided as compared with the case where a large number of bobbins are arranged side by side in the axial direction. Even if they are distributed on the outer circumference of the side wall portion, the variation in the axial distance between the connector pins and the circumferential relative angle can be significantly reduced. That is,
To fix the connector pin to the bobbin, it is conceivable to insert-mold the connector pin together with the bobbin, or insert the connector pin into a hole provided on the outer periphery of the side wall of the bobbin and fix it.
【００１５】どちらの方式を採用するにしても各コネク
タピン間の相対位置（軸方向距離及び周方向相対角度）
のばらつきは、上記従来の多数ボビンの組合せ固定方式
より格段に低減され、コネクタ嵌合精度を向上すること
ができる。第２に、上記したコネクタピン間の相対位置
精度の向上により既存のコイル端巻付け端子でコネクタ
ピンを構成することができ、端子構成を簡単化すること
ができる。Regardless of which method is adopted, the relative position between the connector pins (axial distance and circumferential relative angle)
Variation is markedly reduced as compared with the conventional fixed fixing method of a large number of bobbins, and connector fitting accuracy can be improved. Secondly, by improving the relative positional accuracy between the connector pins described above, the connector pins can be configured with existing coil end winding terminals, and the terminal configuration can be simplified.
【００１６】第３に、径方向内端部に誘導極が周方向に
所定ピッチで形成されるステータコアの側板部はコイル
収容溝の両側に形成されるコア収容空間に相対回動不能
に保持されるので、各誘導極の位置合わせが極めて容易
かつ正確となる。すなわち、ステータコアの側板部をボ
ビンに固定するには、側板部をボビンとともにインサー
ト成形するか又は、ボビンの側壁部の外周に設けた溝に
分割されたステータコアの側板部を挿入することが考え
られるが、どちらにしてもボビンのコア収容空間に側板
部を回動不能に固定することは容易であり、その結果、
各側板部の誘導極の周方向相対角度のばらつきを上記従
来の多数ボビンの組合せ固定方式より格段に低減でき、
ロータの回動精度を向上することができる。Thirdly, the side plate portions of the stator core, in which the induction poles are formed on the radially inner end portion at a predetermined pitch in the circumferential direction, are held in the core accommodating spaces formed on both sides of the coil accommodating groove so as not to rotate relative to each other. Therefore, the alignment of each induction pole becomes extremely easy and accurate. That is, in order to fix the side plate portion of the stator core to the bobbin, it is possible to insert-mold the side plate portion together with the bobbin, or insert the side plate portion of the stator core divided into grooves provided on the outer periphery of the side wall portion of the bobbin. However, in any case, it is easy to non-rotatably fix the side plate part to the core accommodating space of the bobbin, and as a result,
The variation in the circumferential relative angle of the induction poles of each side plate can be significantly reduced compared to the conventional combination fixing method of multiple bobbins described above.
Rotational accuracy of the rotor can be improved.
【００１７】結局、本構成によれば、本発明は、製造工
程を複雑化することなくコネクタピンの接続を容易化す
ることができる。本発明の第２の構成では、上記第１の
構成において更に、コネクタピンを持たない側壁部の外
周面からコネクタピンと同一方向へコイル端巻付け端子
を突設し、互いに周方向同一角度位置に突出するコネク
タピンとコイル端巻付け端子とを軸方向に延設される導
体棒により短絡する。After all, according to this configuration, the present invention can facilitate the connection of the connector pins without complicating the manufacturing process. In a second configuration of the present invention, in addition to the above first configuration, coil end winding terminals are provided so as to project from the outer peripheral surface of the side wall portion having no connector pin in the same direction as the connector pin, and at the same angular position in the circumferential direction. The protruding connector pin and the coil end winding terminal are short-circuited by a conductor rod extending in the axial direction.
【００１８】このようにすれば、予めコネクタピン及び
コイル端巻付け端子が固定された多数のボビンを軸方向
に並べて固定する場合に比較して、コネクタピンとコイ
ル端巻付け端子との間の軸方向距離及び周方向相対角度
のばらつきを格段に低減することができ、導体棒（短絡
バーともいう）の自動取り付けが容易となる。すなわ
ち、このボビンにコイル端巻付け端子を固定するには、
コイル端巻付け端子をボビンとともにインサート成形す
るか、又は、ボビンの側壁部の外周に設けた孔にコイル
端巻付け端子を差し込んで固定することが考えられる。According to this structure, the shaft between the connector pin and the coil end winding terminal is different from the case where a large number of bobbins to which the connector pin and the coil end winding terminal are fixed in advance are arranged side by side in the axial direction. The variation in the directional distance and the relative angle in the circumferential direction can be significantly reduced, and the conductor rod (also referred to as a short-circuit bar) can be easily attached automatically. That is, to fix the coil end winding terminal to this bobbin,
It is conceivable that the coil end winding terminal is insert-molded together with the bobbin, or the coil end winding terminal is inserted into a hole provided on the outer periphery of the side wall of the bobbin and fixed.
【００１９】どちらの方式を採用するにしても各コネク
タピン間の相対位置（軸方向距離及び周方向相対角度）
のばらつきは、上記従来の多数ボビンの組合せ固定方式
より格段に低減でき、その結果として、製造工程を複雑
化することなくコイル端巻付け端子の接続を容易化する
ことができる。本発明の第３の構成では、上記第１の構
成の縦列コイル式ステッピングモータの製造方法であっ
て、インサート成形によりステータコアの側板部をボビ
ンと一体成形する。各ステータコアの側板部の径方向内
端部は周方向に一定ピッチで誘導極が形成されており、
各ステータコアの誘導極間の周方向相対角度のばらつき
は、ステップ毎の回動精度を低下させる。本構成によれ
ば、誘導極間の周方向相対角度のばらつきは、金型にイ
ンサートした側板部の保持精度により確保でき、上記従
来の多数ボビンの組合せ固定方式のように、各ボビンや
ステータコアの周方向相対角度のばらつきの影響を受け
ないので、製造工程を複雑化することなくステップ毎の
回動精度を格段に向上することができる。Regardless of which method is used, the relative position between the connector pins (axial distance and circumferential relative angle)
Can be markedly reduced as compared with the above-mentioned conventional combination fixing method of a large number of bobbins, and as a result, the connection of the coil end winding terminals can be facilitated without complicating the manufacturing process. According to a third configuration of the present invention, in the method of manufacturing the cascade coil type stepping motor having the first configuration, the side plate portion of the stator core is integrally formed with the bobbin by insert molding. Induction poles are formed at a constant pitch in the circumferential direction on the radially inner end of the side plate portion of each stator core,
The variation in the relative angle in the circumferential direction between the induction poles of each stator core reduces the rotation accuracy for each step. According to this configuration, the variation in the relative angle in the circumferential direction between the induction poles can be ensured by the holding accuracy of the side plate portion inserted in the mold, and like the conventional combination fixing method of a large number of bobbins, the bobbin and the stator core are not fixed. Since it is not affected by the variation in the relative angle in the circumferential direction, it is possible to remarkably improve the rotation accuracy for each step without complicating the manufacturing process.
【００２０】本発明の第４の構成では、上記第１の構成
の縦列コイル式ステッピングモータの製造方法であっ
て、ボビンに成形されたコア収容溝にステータコアの側
板部を分割して相対回動不能に嵌め込む。このようにす
れば、各側板部間の周方向相対角度のばらつきは第３の
構成とどうように低減できる。According to a fourth structure of the present invention, in the method of manufacturing the cascade coil type stepping motor of the first structure, the side plate portion of the stator core is divided into core receiving grooves formed in the bobbin for relative rotation. It is impossible to fit. With this configuration, the variation in the circumferential relative angle between the side plate portions can be reduced as in the third configuration.
【００２１】本発明の第５の構成では、上記第１の構成
の縦列コイル式ステッピングモータの製造方法において
更に、コネクタピン及びコイル端巻付け端子が、インサ
ート成形により側壁部に固定されるので、製造工程が簡
素としつつ上記効果を奏することができる。本発明の第
６の構成では、上記第１の構成の縦列コイル式ステッピ
ングモータの製造方法において更に、コネクタピン及び
コイル端巻付け端子が、側壁部に成形時に形成された孔
に差し込まれて固定されるので、ボビン成形装置を簡素
としつつ上記効果を奏することができる。According to the fifth aspect of the present invention, in the method of manufacturing the cascade coil type stepping motor of the first aspect, the connector pin and the coil end winding terminal are fixed to the side wall portion by insert molding. The above effect can be achieved while simplifying the manufacturing process. According to a sixth configuration of the present invention, in the method for manufacturing the cascade coil stepping motor of the first configuration, further, the connector pin and the coil end winding terminal are inserted into a hole formed in the side wall portion at the time of molding and fixed. As a result, the bobbin molding apparatus can be simplified and the above-described effects can be achieved.
【００２２】[0022]
【実施例】この実施例の４相縦列コイル式ステッピング
モータのステータを図１〜図５を参照して説明する。４
相縦列コイル式ステッピングモータ自体の基本構造は、
図８と同じであり、周知であるので説明を省略する。図
１はステータの斜視図を示し、図２はステータの軸方向
断面図を示し、図３はステータを樹脂からなるケーシン
グで囲覆した状態を示し、図４は上記ケーシングに付設
されたコネクタ部の一部平面図を示し、図５は相コイル
の等価回路図を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS A stator of a four-phase tandem coil type stepping motor of this embodiment will be described with reference to FIGS. Four
The basic structure of the phase cascade coil type stepping motor itself is
Since it is the same as FIG. 8 and is well known, description thereof will be omitted. 1 shows a perspective view of the stator, FIG. 2 shows an axial sectional view of the stator, FIG. 3 shows a state in which the stator is surrounded by a casing made of resin, and FIG. 4 shows a connector portion attached to the casing. Fig. 5 shows a partial plan view of Fig. 5, and Fig. 5 shows an equivalent circuit diagram of the phase coil.
【００２３】このステータは、ボビン１と、ステータコ
アの側板部２と、ステータコアの継鉄部３と、相コイル
４１〜４４と、コネクタピン５１〜５６と、コイル端巻
付け端子６１〜６４とからなり、インサート樹脂成形に
よりケーシング７に一体に囲覆されている。ボビン１
は、樹脂インサート成形により形成されるものであり、
ロータ１０が内部に回転自在に収容される円筒部１１を
有し、円筒部１１の外周面から径外方向へ輪板状に５個
の側壁部１２が形成されている。各側壁部１２は、軸方
向に等間隔を隔てて配設され、互いに隣接する一対の側
壁部１２の間の環状溝がコイル収容溝１３となってい
る。また、各側壁部１２の両端面には、コイル収容溝１
３に面してステータコアの側板部２がインサート成形に
より埋設される略環状のコア収容空間１４が存在する。
５個の側壁部１２の内、一端側の１個を除く残り４個の
側壁部１２の所定部位には、側壁部１２の一部として同
一の径外方向へブロック状のホルダ部１５が突設されて
おり、ホルダ部１５の平坦な径内方向外端面にはこの外
端面に直角にコイル端巻付け端子６１〜６４又はコイル
端巻付端子兼用のコネクタピン５１〜５６が突出してい
る。This stator comprises a bobbin 1, a side plate portion 2 of the stator core, a yoke portion 3 of the stator core, phase coils 41 to 44, connector pins 51 to 56, and coil end winding terminals 61 to 64. And is integrally surrounded by the casing 7 by insert resin molding. Bobbin 1
Is formed by resin insert molding,
The rotor 10 has a cylindrical portion 11 that is rotatably housed therein, and five side wall portions 12 are formed radially outward from the outer peripheral surface of the cylindrical portion 11 in the shape of a wheel plate. The side wall portions 12 are arranged at equal intervals in the axial direction, and an annular groove between a pair of adjacent side wall portions 12 serves as a coil housing groove 13. Further, the coil housing groove 1 is provided on both end faces of each side wall portion 12.
There is a substantially annular core accommodating space 14 in which the side plate portion 2 of the stator core is embedded by insert molding so as to face 3.
A block-shaped holder portion 15 projects in the same radial outward direction as a part of the side wall portion 12 at a predetermined portion of the remaining four side wall portions 12 excluding one on one end side among the five side wall portions 12. The coil end winding terminals 61 to 64 or the connector pins 51 to 56 also serving as the coil end winding terminals project at a flat outer end surface in the radial direction of the holder portion 15 at right angles to the outer end surface.
【００２４】ステータコアの側板部２は、輪板形状の軟
鉄からなり、例えば図８の（ｂ）に示されるように、内
周面に多数の誘導極２１が径内方向へ突設されており、
同一の側板部２の各誘導極２１は周方向へ一定ピッチで
配列されている。各側板部２の各誘導極２１は図２に示
すように円筒部１１の内周面に露出して、ロータ１０の
外周面の磁極１０ａに対面している。なお、図２では合
計８個の側板部２の各誘導極２１は周方向角度位置が一
致して配列されているが、各誘導極２１は相コイル４１
〜４４毎に周方向へ所定の相対角度だけずらして配設す
ることも可能である。また、側板部２の外周面は、ホル
ダ部１５以外の部分で側壁部１２の外周面に露出してい
る。The side plate portion 2 of the stator core is made of a ring-shaped soft iron, and as shown in FIG. 8B, for example, a large number of induction poles 21 are provided on the inner peripheral surface so as to project radially inward. ,
The respective induction poles 21 of the same side plate portion 2 are arranged at a constant pitch in the circumferential direction. Each induction pole 21 of each side plate portion 2 is exposed on the inner peripheral surface of the cylindrical portion 11 and faces the magnetic pole 10a on the outer peripheral surface of the rotor 10, as shown in FIG. In FIG. 2, the induction poles 21 of the eight side plate portions 2 in total are arranged so that the angular positions in the circumferential direction coincide with each other.
It is also possible to displace each for every 44 to a predetermined relative angle in the circumferential direction. Further, the outer peripheral surface of the side plate portion 2 is exposed to the outer peripheral surface of the side wall portion 12 at a portion other than the holder portion 15.
【００２５】各コイル収容溝１３にはそれぞれ異なる相
電圧が印加される合計４個の相コイル４１〜４４が個別
に収容されており、それらの端部は、隣接するコネクタ
ピン５１〜５６及びコイル端巻付け端子６１〜６４に個
別に巻付けられている。ボビン１の各側壁部１２の外周
面には、一対の半割り円筒からなる継鉄部３が嵌着され
ており、軟鉄からなる継鉄部３の両端面は側板部２の露
出表面に密接してコイル収容溝１３の両側の一対の側壁
部１２を磁気結合している。A total of four phase coils 41 to 44, to which different phase voltages are applied, are individually housed in the coil housing grooves 13, and the ends thereof are adjacent to the connector pins 51 to 56 and the coil. The end winding terminals 61 to 64 are individually wound. On the outer peripheral surface of each side wall portion 12 of the bobbin 1, a pair of half-split cylinder yoke portions 3 are fitted, and both end surfaces of the soft iron yoke portion 3 are in close contact with the exposed surface of the side plate portion 2. Then, the pair of side wall portions 12 on both sides of the coil housing groove 13 are magnetically coupled.
【００２６】コネクタピン５２、５５とコイル端巻付け
端子６１、６３は、図１に示すようにホルダ部１５近傍
において、渡りバーをなす導体棒８１で互いに短絡され
ており、コネクタピン５３とコイル端巻付け端子６２も
導体棒８２で互いに短絡されており、コネクタピン５６
とコイル端巻付け端子６４も導体棒８３で互いに短絡さ
れている。ケーシング７の外周面には断面長方形の角筒
形状のコネクタ筒部７１がコネクタピン５１〜５６を囲
んで立設されている。各相コイル４の回路図を図５に示
す。コネクタピン５２、５５は正の電源端に接続され、
コネクタピン５３、５１、５４、５６はそれぞれ異なる
エミッタ接地のトランジスタのコレクタ（図示せず）に
接続され、これらトランジスタの断続により各相コイル
４１〜４４への一方向への通電が断続される。これによ
りロータ１０が１ステップづつ回動される。As shown in FIG. 1, the connector pins 52 and 55 and the coil end winding terminals 61 and 63 are short-circuited to each other by a conductor bar 81 forming a crossover bar in the vicinity of the holder portion 15, and the connector pin 53 and the coil are wound. The end winding terminals 62 are also short-circuited to each other by the conductor rods 82, and the connector pins 56
The coil end winding terminal 64 is also short-circuited to each other by the conductor rod 83. On the outer peripheral surface of the casing 7, a rectangular tubular connector tubular portion 71 having a rectangular cross section is provided upright so as to surround the connector pins 51 to 56. A circuit diagram of each phase coil 4 is shown in FIG. The connector pins 52 and 55 are connected to the positive power source end,
The connector pins 53, 51, 54 and 56 are connected to the collectors (not shown) of transistors having different grounded emitters, and the connection of these transistors interrupts the unidirectional energization of the phase coils 41 to 44. As a result, the rotor 10 is rotated step by step.
【００２７】以下、上記構成のステータの製造工程を説
明する。まず、コネクタピン５１〜５６、コイル端巻付
け端子６１〜６４、側板部２を金型内の所定位置にイン
サートした状態で、樹脂を注入してボビン１を成形し、
次に、相コイル４１〜４４を巻装して、それらの端部を
隣接するコネクタピン５１〜５６又はコイル端巻付け端
子６１〜６４のどれかに巻き付ける。次に、できたアセ
ンブリを再度、金型にセットし、その外周面に沿って継
鉄部３を保持し、インサート樹脂成形によりコネクタ筒
部７１をもつケーシング７を成形する。ケーシング７の
底部の穴７２はロータ１０の回転軸（図示せず）を回転
自在に保持する軸受け孔である。The manufacturing process of the stator having the above structure will be described below. First, in a state in which the connector pins 51 to 56, the coil end winding terminals 61 to 64, and the side plate portion 2 are inserted at predetermined positions in the mold, resin is injected to form the bobbin 1,
Next, the phase coils 41 to 44 are wound, and their ends are wound around any of the adjacent connector pins 51 to 56 or the coil end winding terminals 61 to 64. Next, the resulting assembly is set in the mold again, the yoke portion 3 is held along the outer peripheral surface thereof, and the casing 7 having the connector tubular portion 71 is molded by insert resin molding. The hole 72 at the bottom of the casing 7 is a bearing hole for rotatably holding the rotating shaft (not shown) of the rotor 10.
【００２８】なお、上記実施例では、コネクタピン５１
〜５６及びコイル端巻付け端子６１〜６４はインサート
成形によりホルダ部１５に固定されたが、ホルダ部１５
に設けた穴に後から挿入、固定されてもよい。 （実施例２）他の実施例を図６に示す。この実施例で
は、ステータコアの側板部２に軸方向に貫通孔２４を設
けて側板部２とボビン１との結合力を向上させた例を示
す。 （実施例３）他の実施例を図７に示す。この実施例で
は、ボビン１の側壁部１２には、その外周面から略環状
のコア収容空間１４ａが凹設されており、このコア収容
空間１４ａは円筒部１１のロータ収容空間１５０に達し
ている。ただし、この実施例ではボビン１の強度確保の
ためホルダ部１５の位置にて側壁部１２にはコア収容空
間１４ａは凹設されない。In the above embodiment, the connector pin 51
~ 56 and coil end winding terminals 61 to 64 are fixed to the holder part 15 by insert molding.
It may be inserted and fixed later in the hole provided in. (Embodiment 2) Another embodiment is shown in FIG. This embodiment shows an example in which a through hole 24 is provided in the side plate portion 2 of the stator core in the axial direction to improve the coupling force between the side plate portion 2 and the bobbin 1. (Embodiment 3) Another embodiment is shown in FIG. In this embodiment, the side wall portion 12 of the bobbin 1 is provided with a substantially annular core accommodating space 14a from the outer peripheral surface thereof, and the core accommodating space 14a reaches the rotor accommodating space 150 of the cylindrical portion 11. . However, in this embodiment, in order to secure the strength of the bobbin 1, the core accommodating space 14a is not provided in the side wall 12 at the position of the holder 15.
【００２９】ステータコアの側板部２ａ、２ｂはそれぞ
れ略半割り円板形状を有し、コア収容空間１４ａにそれ
ぞれ圧入される。側板部２ａ、２ｂの周方向の一端面２
２はホルダ部１５の周方向両端面に個別に当接され、そ
れらの周方向の他端面２３は互いに当接される。これに
より、側板部２ａ、２ｂの回動及び軸方向変位が規制さ
れ、正常位置に整合されることになる。The side plate portions 2a and 2b of the stator core each have a substantially half-disc shape and are press-fitted into the core accommodating space 14a. One end surface 2 of the side plate portions 2a, 2b in the circumferential direction
2 are individually abutted on both circumferential end surfaces of the holder portion 15, and their other circumferential end surfaces 23 are abutted on each other. As a result, the rotation and axial displacement of the side plate portions 2a and 2b are regulated, and the side plate portions 2a and 2b are aligned in the normal position.
【００３０】この後、コイル端巻付け端子６１〜６４及
びコネクタピン５１〜５６がホルダ部１５の上端面の孔
（図示せず）に圧入され、実施例１と同様に相コイル
（図示せず）が巻装され、端末処理されて、金型内に継
鉄部（図示せず）とともに収容され、ケーシング（図示
せず）が成形されてステータが完成される。After that, the coil end winding terminals 61 to 64 and the connector pins 51 to 56 are press-fitted into the holes (not shown) in the upper end surface of the holder portion 15, and the phase coil (not shown) as in the first embodiment. ) Is wound and end-treated, and is housed in a mold together with a yoke portion (not shown), and a casing (not shown) is molded to complete the stator.
【図１】実施例１の縦列コイル式ステッピングモータの
ステータの斜視図である。FIG. 1 is a perspective view of a stator of a cascade coil type stepping motor according to a first embodiment.
【図２】図１のステータの軸方向断面図である。FIG. 2 is an axial cross-sectional view of the stator shown in FIG.
【図３】図１のステータを樹脂からなるケーシングで囲
覆した状態を示す軸方向断面図である。FIG. 3 is an axial cross-sectional view showing a state in which the stator of FIG. 1 is surrounded by a casing made of resin.
【図４】図３のケーシング７に付設されたコネクタ筒部
７１を示す平面図である。FIG. 4 is a plan view showing a connector cylinder portion 71 attached to the casing 7 of FIG.
【図５】図３の相コイル４１〜４４の回路図である。5 is a circuit diagram of phase coils 41 to 44 of FIG.
【図６】実施例２の縦列コイル式ステッピングモータの
のステータの断面図である。FIG. 6 is a cross-sectional view of a stator of a cascade coil type stepping motor according to a second embodiment.
【図７】実施例３の縦列コイル式ステッピングモータの
ステータの斜視図である。FIG. 7 is a perspective view of a stator of a cascade coil type stepping motor according to a third embodiment.
【図８】（ａ）は、従来の４相縦列コイル式ステッピン
グモータの一例を示す軸方向模式断面図である。（ｂ）
はその径方向模式断面図である。FIG. 8A is a schematic axial sectional view showing an example of a conventional four-phase cascade coil stepping motor. (B)
FIG. 3 is a schematic cross-sectional view in the radial direction.
【図９】図８のステータの一部破断分解斜視図である。9 is a partially cutaway exploded perspective view of the stator of FIG.
【図１０】図８のボビン２００の軸方向断面図である。10 is an axial cross-sectional view of the bobbin 200 of FIG.
６１〜６４はコイル端巻付け端子、１はボビン、４１〜
４４は相コイル、２１は誘導極、２はステータコアの側
板部、３はステータコアの継鉄部、１１はボビン１の円
筒部、１２はボビン１の側壁部、１０はロータ、１３は
コイル収容溝、１４はコア収容空間、５１〜５６はコネ
クタピン、８１〜８３は導体棒である。61-64 are coil end winding terminals, 1 is a bobbin, 41-
Reference numeral 44 is a phase coil, 21 is an induction pole, 2 is a side plate portion of the stator core, 3 is a yoke portion of the stator core, 11 is a cylindrical portion of the bobbin 1, 12 is a side wall portion of the bobbin 1, 10 is a rotor, and 13 is a coil accommodating groove. , 14 are core accommodating spaces, 51 to 56 are connector pins, and 81 to 83 are conductor rods.
Claims (6)
巻装されて軸方向に配列されるとともに端部が前記コイ
ル端巻付け端子に巻付けられる多数の相コイルと、前記
相コイルの両側に配設されて径方向内端部が誘導極をな
す一対の側板部と前記相コイルの外周側にて前記両側壁
部を磁気結合する継鉄部とからなるとともに前記相コイ
ルに等しい数だけ配設される多数の対をなすステータコ
アと、外周面が前記ステータコアの内端面に対面する回
転自在のロータとを備える縦列コイル式ステッピングモ
ータにおいて、 前記ボビンは、ロータが内部に回転自在に収容される電
気絶縁性の円筒部と、前記円筒部と一体成形されてなる
とともに前記円筒部の外周面から径外方向へ輪板状に多
数並立される電気絶縁性の側壁部と、前記各側壁部によ
り前記円筒部の外周側に区画形成されて前記相コイルを
収容する多数のコイル収容溝と、前記コイル収容溝の両
側に形成されて前記ステータコアの前記側板部を相対回
動不能に保持する略環状のコア収容空間とを備え、 多数の前記コイル端巻付け端子は、互いに隣接する複数
の側壁部の外周の所定位置から所定の一方向へ平行に突
設されるとともにコネクタピンを兼ねることを特徴とす
る縦列コイル式ステッピングモータ。1. A large number of phase coils whose coil end winding terminals are wound around a fixed bobbin and arranged in the axial direction and whose ends are wound around the coil end winding terminals, and It is composed of a pair of side plate parts arranged on both sides and having radial inner ends forming induction poles, and yoke parts magnetically coupling the both side wall parts on the outer peripheral side of the phase coil, and is equal in number to the phase coils. In a tandem coil stepping motor including a plurality of pairs of stator cores arranged in parallel, and a rotatable rotor whose outer peripheral surface faces the inner end surface of the stator core, the bobbin accommodates the rotor rotatably inside. An electrically insulative cylindrical portion, an electrically insulative side wall portion formed integrally with the cylindrical portion and erected in a ring-like shape from the outer peripheral surface of the cylindrical portion in a radially outward direction, and each side wall. By department A large number of coil housing grooves that are formed on the outer peripheral side of the cylindrical portion to house the phase coils, and a substantially annular shape that is formed on both sides of the coil housing groove and that holds the side plate portions of the stator core such that they cannot rotate relative to each other. A plurality of the coil end winding terminals are provided so as to project in parallel from a predetermined position on the outer circumference of a plurality of side wall portions adjacent to each other in a predetermined direction and also serve as connector pins. A vertical coil type stepping motor.
外周面から前記一方向へ突出して前記相コイルの端部が
巻付けられるコイル端巻付け端子を有し、 互いに周方向同一角度位置に突出する前記コネクタピン
及び前記コイル端巻付け端子は、軸方向に延設される導
体棒により短絡される請求項１記載の縦列コイル式ステ
ッピングモータ。2. A coil end winding terminal is provided which projects from the outer peripheral surface of the side wall portion without the connector pin in the one direction and around which an end portion of the phase coil is wound, and the coil end winding terminals are provided at the same angular position in the circumferential direction. The cascade coil stepping motor according to claim 1, wherein the protruding connector pin and the coil end winding terminal are short-circuited by a conductor rod extending in the axial direction.
前記側板部を前記ボビンと一体成形した後、前記相コイ
ルを前記コイル収容溝にそれぞれ個別に巻装する請求項
１記載の縦列コイル式ステッピングモータの製造方法。3. The tandem coil stepping motor according to claim 1, wherein the side plate portion of the stator core is integrally molded with the bobbin by insert molding, and then the phase coils are individually wound around the coil housing grooves. Method.
記ステータコアの前記側板部を分割して相対回動不能に
収容し、その後、前記コイル収容溝に前記相コイルをそ
れぞれ個別に巻装する請求項１記載の縦列コイル式ステ
ッピングモータの製造方法。4. After molding the bobbin, the side plate portion of the stator core is divided into the core accommodating grooves and accommodated so as not to rotate relative to each other, and then the phase coils are individually wound in the coil accommodating grooves. The method for manufacturing a cascade coil stepping motor according to claim 1.
端子は、インサート成形により前記側壁部に固定される
請求項１記載の縦列コイル式ステッピングモータの製造
方法。5. The method of manufacturing a cascade coil stepping motor according to claim 1, wherein the connector pin and the coil end winding terminal are fixed to the side wall portion by insert molding.
端子は、前記側壁部に成形時に形成された孔に差し込ま
れて固定される請求項１記載の縦列コイル式ステッピン
グモータの製造方法。6. The method of manufacturing a cascade coil stepping motor according to claim 1, wherein the connector pin and the coil end winding terminal are fixed by being inserted into a hole formed in the side wall portion at the time of molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12864895A JPH08322230A (en) | 1995-05-26 | 1995-05-26 | Cascade coil type stepping motor and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12864895A JPH08322230A (en) | 1995-05-26 | 1995-05-26 | Cascade coil type stepping motor and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08322230A true JPH08322230A (en) | 1996-12-03 |
Family
ID=14990016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12864895A Pending JPH08322230A (en) | 1995-05-26 | 1995-05-26 | Cascade coil type stepping motor and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08322230A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998019384A1 (en) * | 1996-10-25 | 1998-05-07 | Nippon Seiki Co., Ltd. | Stepping motor |
| WO2006118219A1 (en) * | 2005-04-28 | 2006-11-09 | Denso Corporation | Motor and control device thereof |
| WO2006126552A1 (en) * | 2005-05-24 | 2006-11-30 | Denso Corporation | Motor and control device thereof |
| CN1306689C (en) * | 2002-07-25 | 2007-03-21 | 株式会社三协精机制作所 | Step-by-step motor and manufactring method thereof |
-
1995
- 1995-05-26 JP JP12864895A patent/JPH08322230A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998019384A1 (en) * | 1996-10-25 | 1998-05-07 | Nippon Seiki Co., Ltd. | Stepping motor |
| US6100612A (en) * | 1996-10-25 | 2000-08-08 | Nippon Seiki Co., Ltd. | Stepping motor |
| CN1306689C (en) * | 2002-07-25 | 2007-03-21 | 株式会社三协精机制作所 | Step-by-step motor and manufactring method thereof |
| WO2006118219A1 (en) * | 2005-04-28 | 2006-11-09 | Denso Corporation | Motor and control device thereof |
| US7816822B2 (en) | 2005-04-28 | 2010-10-19 | Denso Corporation | Motor and control unit thereof |
| WO2006126552A1 (en) * | 2005-05-24 | 2006-11-30 | Denso Corporation | Motor and control device thereof |
| CN101189782A (en) * | 2005-05-24 | 2008-05-28 | 株式会社电装 | Electromotor and its control device |
| KR101011396B1 (en) * | 2005-05-24 | 2011-01-28 | 가부시키가이샤 덴소 | Motor and motor system |
| US7911107B2 (en) | 2005-05-24 | 2011-03-22 | Denso Corporation | AC electric motor |
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