JP2003047227A - Stepping motor - Google Patents
Stepping motorInfo
- Publication number
- JP2003047227A JP2003047227A JP2001228959A JP2001228959A JP2003047227A JP 2003047227 A JP2003047227 A JP 2003047227A JP 2001228959 A JP2001228959 A JP 2001228959A JP 2001228959 A JP2001228959 A JP 2001228959A JP 2003047227 A JP2003047227 A JP 2003047227A
- Authority
- JP
- Japan
- Prior art keywords
- bearing member
- magnetic pole
- motor
- motor shaft
- rotor
- 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
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、デジタルカメラ等
に搭載され、例えばレンズ駆動に用いられるステッピン
グモータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepping motor mounted on a digital camera or the like and used for driving a lens, for example.
【０００２】[0002]
【従来の技術】モータの径方向のサイズを小型化したス
テッピングモータが特開平９−３３１６６６号公報等で
公開されている。このステッピングモータの構造を図４
に示す。2. Description of the Related Art A stepping motor in which the size of the motor in the radial direction is reduced is disclosed in Japanese Patent Laid-Open No. 9-331666. The structure of this stepping motor is shown in FIG.
Shown in.
【０００３】５はロータを構成する円筒形状のマグネッ
トであり、このロータであるマグネット５は、その外周
表面を円周方向にｎ分割してＳ極、Ｎ極が交互に着磁さ
れている。マグネット５の回転の中心には出力軸が固着
されている。この出力軸とマグネット５とでロータを構
成している。２及び３はステータとなる内側磁極部およ
び外側磁極部であり、筒形状のコイル４を挟むようにし
て配置されている。このコイル４は前記マグネット５と
同心でかつ、マグネット５を軸方向に挟む位置に配置さ
れ、コイル４の外径はマグネット５の外径とほぼ同じ寸
法である。Reference numeral 5 is a cylindrical magnet which constitutes a rotor. The magnet 5 which is the rotor has its outer peripheral surface divided into n in the circumferential direction so that S poles and N poles are alternately magnetized. An output shaft is fixed to the center of rotation of the magnet 5. The output shaft and the magnet 5 form a rotor. Reference numerals 2 and 3 denote an inner magnetic pole portion and an outer magnetic pole portion that serve as a stator, and are arranged so as to sandwich the tubular coil 4. The coil 4 is concentric with the magnet 5 and is arranged at a position sandwiching the magnet 5 in the axial direction, and the outer diameter of the coil 4 is substantially the same as the outer diameter of the magnet 5.
【０００４】このコイル４が通電されることにより内側
磁極部２および外側磁極部３が励磁される。これら内側
磁極部２と外側磁極部３は周方向に複数並んだ櫛歯を有
しており、内側磁極部２の歯と外側磁極部３の歯とが、
コイル４を挟んで対向して配置されている。したがっ
て、コイル４により発生する磁束は外側磁極部３と内側
磁極部２との間のロータであるマグネット５を横切るの
で、効果的にロータであるマグネット５に作用し、モー
タの出力を高める。When the coil 4 is energized, the inner magnetic pole portion 2 and the outer magnetic pole portion 3 are excited. The inner magnetic pole portion 2 and the outer magnetic pole portion 3 have comb teeth arranged in the circumferential direction, and the teeth of the inner magnetic pole portion 2 and the teeth of the outer magnetic pole portion 3 are
The coils 4 are arranged so as to be opposed to each other. Therefore, the magnetic flux generated by the coil 4 traverses the magnet 5 which is the rotor between the outer magnetic pole portion 3 and the inner magnetic pole portion 2, and thus effectively acts on the magnet 5 which is the rotor to increase the output of the motor.
【０００５】図３にこのモータの軸受部近傍を拡大した
図を示す。モータ軸受構造は円筒形状にて軸受１の外周
部がモータ内側磁極部２の内周の円筒部に圧入固定され
ており、軸受１の内部にはモータ軸を挿入固定するため
の円筒形状のモータ軸挿入穴が設けられており、モータ
軸挿入穴径はモータ軸の振れが規制でき、さらにモータ
軸が締めつけられモータ軸の回転に弊害がないように設
定された穴径１種類にて穴あけされており、内側磁極内
円筒部に軸受部材を圧入固定し、軸受部材にモータ軸を
挿入しモータ軸を位置決めするように構成されている。FIG. 3 shows an enlarged view of the vicinity of the bearing portion of this motor. The motor bearing structure has a cylindrical shape, and the outer peripheral portion of the bearing 1 is press-fitted and fixed to the inner peripheral cylindrical portion of the magnetic pole portion 2 on the inner side of the motor, and a cylindrical motor for inserting and fixing the motor shaft inside the bearing 1. The shaft insertion hole is provided, and the diameter of the motor shaft insertion hole can regulate the runout of the motor shaft, and the motor shaft is tightened so that the rotation of the motor shaft is not adversely affected. The bearing member is press-fitted and fixed to the inner magnetic pole inner cylindrical portion, and the motor shaft is inserted into the bearing member to position the motor shaft.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来例では、軸受部材がモータ内側磁極内円筒部に圧入固
定されることで、圧入による外圧で軸受部材の外周が収
縮し、そのために軸受部材に設けられているモータ軸を
挿入固定するためのモータ軸挿入穴が収縮し、モータ軸
を挿入するとモータ軸を軸受部材が締めつけてしまい、
モータ軸の回転に対して摺動抵抗があがってしまう結
果、モータ軸の回転に対し回転を妨げる力が強くなるこ
とでモータ軸の回転に弊害が発生するという欠点があっ
た。However, in the above-mentioned conventional example, since the bearing member is press-fitted and fixed in the inner magnetic pole inner cylindrical portion of the motor, the outer circumference of the bearing member is contracted by the external pressure due to the press-fitting, and therefore the bearing member is The motor shaft insertion hole for inserting and fixing the provided motor shaft contracts, and when the motor shaft is inserted, the bearing member tightens the motor shaft,
As a result of the increase in sliding resistance with respect to the rotation of the motor shaft, there is a drawback that the rotation of the motor shaft is adversely affected because the force that impedes the rotation against the rotation of the motor shaft becomes stronger.
【０００７】したがって、本出願に係る第１の発明の目
的は、円筒形状に形成されると共に、周方向にｎ分割し
て異なる極に交互に着磁されたロータを備え、該ロータ
の軸方向に第１のコイルと前記ロータと第２のコイルと
を順に配置し、第１のコイルにより励磁される第１の外
側磁極及び第１の内側磁極を前記ロータの一端側の外周
面及び内周面に対向させてロータの一端を挟み込むと共
に、第２コイルにより励磁される第２の外周磁極及び第
２の内側磁極を前記ロータの他端の外周面及び内周面に
対向させてロータの他端を挟み込むようにし、かつ第１
の外側磁極と第２の外側磁極に対して内周面で嵌合して
連結する連結リングを備え、モータ軸をモータ内部で受
ける軸受部材をモータ内のある一端の内側磁極内円筒空
部にて圧入固定するモータにおいて、前記軸受部材が圧
入による変形・締めつけでモータ軸との接触部において
モータ回転軸を締めつけることがないようにモータ軸と
軸受部材接触部の軸受部材外周部を内側磁極内円筒部と
接触しないよう軸受部材外周部に段差を設けて外周を小
さくするとともに、内側磁極内円筒部に軸受部材外周部
が圧入される部分のモータ軸挿入部を圧入によるモータ
軸締めつけが生じないように挿入部径を円錐形状に広
げ、モータ軸が軸受部材に締めつけられない形状を有す
ることでモータ軸の回転に対し軸受部材がモータ軸の回
転を妨げることがないようにすることである。Therefore, an object of the first invention according to the present application is to provide a rotor which is formed in a cylindrical shape and which is divided into n in the circumferential direction and is alternately magnetized to different poles. A first coil, the rotor, and a second coil are arranged in this order, and the first outer magnetic pole and the first inner magnetic pole excited by the first coil are connected to the outer peripheral surface and the inner peripheral surface on one end side of the rotor. One end of the rotor is sandwiched so as to face the surface, and the second outer magnetic pole and the second inner magnetic pole excited by the second coil are made to face the outer peripheral surface and the inner peripheral surface of the other end of the rotor, respectively. The end should be pinched, and the first
Of the outer magnetic pole and the outer magnetic pole of the second outer magnetic pole are fitted to each other on the inner peripheral surface and are coupled to each other. In a motor that is press-fitted and fixed by press-fitting, the bearing member outer peripheral portion of the motor shaft and the bearing member contact portion is located inside the inner magnetic pole so that the motor rotation shaft is not tightened at the contact portion with the motor shaft due to deformation and tightening due to press-fitting. A step is provided on the outer peripheral part of the bearing member to prevent contact with the cylindrical part to reduce the outer periphery, and the motor shaft insertion part of the part where the outer peripheral part of the bearing member is press-fitted into the inner magnetic pole inner cylindrical part is not tightened by press fitting the motor shaft. As described above, the diameter of the insertion portion is expanded into a conical shape and the motor shaft has a shape that cannot be fastened to the bearing member, so that the bearing member does not interfere with the rotation of the motor shaft. It is to so.
【０００８】本出願に係る第２の発明の目的は、前記本
出願に係る第１の発明における軸受部材が圧入による変
形・締めつけでモータ軸との接触部においてモータ回転
軸を締めつけることがないようにモータ軸と軸受部材接
触部の軸受部材外周部を内側磁極内円筒部と接触しない
よう軸受部材外周部に段差を設けて外周を小さくすると
ともに、内側磁極内円筒部に軸受部材外周部が圧入され
る部分のモータ軸挿入部を圧入によるモータ軸締めつけ
が生じないように挿入部径に段差を設けて円筒形状に広
げ、モータ軸が軸受部材に締めつけられない形状を有す
ることでモータ軸の回転に対し軸受部材がモータ軸の回
転を妨げることがないようにすることである。A second object of the present invention is to prevent the bearing member in the first invention of the present application from tightening the motor rotating shaft at the contact portion with the motor shaft due to deformation / tightening due to press fitting. To reduce the outer circumference by providing a step on the outer peripheral part of the bearing member so that the outer peripheral part of the bearing contacting the motor shaft does not contact the inner cylindrical part of the inner magnetic pole, and the outer peripheral part of the bearing member is pressed into the inner cylindrical part of the inner magnetic pole. Rotation of the motor shaft by forming a step in the diameter of the insertion part of the motor shaft and expanding it into a cylindrical shape so that the motor shaft will not be tightened by press fitting On the other hand, it is to prevent the bearing member from interfering with the rotation of the motor shaft.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本出願に係る第１の発明は、円筒形状に形成される
と共に、周方向にｎ分割して異なる極に交互に着磁され
たロータを備え、該ロータの軸方向に第１のコイルと前
記ロータと第２のコイルとを順に配置し、第１のコイル
により励磁される第１の外側磁極及び第１の内側磁極を
前記ロータの一端側の外周面及び内周面に対向させてロ
ータの一端を挟み込むと共に、第２コイルにより励磁さ
れる第２の外周磁極及び第２の内側磁極を前記ロータの
他端の外周面及び内周面に対向させてロータの他端を挟
み込むようにし、かつ第１の外側磁極と第２の外側磁極
に対して内周面で嵌合して連結する連結リングを備え、
モータ軸をモータ内部で受ける軸受部材をモータ内のあ
る一端の内側磁極内円筒空部にて圧入固定するモータに
おいて、前記軸受部材が圧入による変形・締めつけでモ
ータ軸との接触部においてモータ回転軸を締めつけるこ
とがないようにモータ軸と軸受部材接触部の軸受部材外
周部を内側磁極内円筒部と接触しないよう軸受部材外周
部に段差を設けて外周を小さくするとともに、内側磁極
内円筒部に軸受部材外周部が圧入される部分のモータ軸
挿入部を圧入によるモータ軸締めつけが生じないように
挿入部径を円錐形状に広げ、モータ軸が軸受部材に締め
つけられない形状を有することでモータ軸の回転に対し
軸受部材がモータ軸の回転を妨げることがないようにす
ることを特徴とする。In order to achieve the above object, the first invention of the present application is formed into a cylindrical shape and is divided into n in the circumferential direction and magnetized alternately to different poles. A rotor is provided, and a first coil, the rotor, and a second coil are sequentially arranged in the axial direction of the rotor, and a first outer magnetic pole and a first inner magnetic pole excited by the first coil are provided in the rotor. One end of the rotor is sandwiched so as to face the outer peripheral surface and the inner peripheral surface on one end side of the rotor, and the second outer magnetic pole and the second inner magnetic pole excited by the second coil are connected to the outer peripheral surface and the inner peripheral surface of the other end of the rotor. A connecting ring that faces the peripheral surface so as to sandwich the other end of the rotor, and that is fitted and connected to the first outer magnetic pole and the second outer magnetic pole on the inner peripheral surface;
In a motor in which a bearing member that receives the motor shaft inside the motor is press-fitted and fixed in a cylindrical hollow portion inside an inner magnetic pole at one end inside the motor, the bearing member is deformed and tightened by press-fitting, and the motor rotating shaft is in contact with the motor shaft. In order to prevent the motor shaft from coming into contact with the bearing member outer peripheral portion of the bearing member so as not to contact the inner magnetic pole inner cylindrical portion, the outer periphery of the bearing member is stepped to reduce the outer periphery and The motor shaft has a conical shape so that the motor shaft insertion part where the outer peripheral part of the bearing member is press-fitted does not cause tightening of the motor shaft due to press-fitting, and the motor shaft has a shape that cannot be tightened on the bearing member. It is characterized in that the bearing member does not hinder the rotation of the motor shaft with respect to the rotation.
【００１０】上記構成において、軸受部材をモータ内側
磁極内円筒部に圧入固定した状態でモータ軸を軸受部材
のモータ軸受挿入穴部に挿入してもモータ軸に対して軸
受部材がモータ軸をしめつけることがなく、モータ軸の
振れを規制する部分では軸受部材そのものがモータ内側
磁極内円筒部と圧入、接触しないことから軸受部材が変
形することなくモータ軸挿入穴部も変形をおこさずにモ
ータ軸を受けることでモータ軸の回転に対して軸受部材
がモータ軸の回転を妨げることがないようにすることが
できる。In the above structure, even if the motor shaft is inserted into the motor bearing insertion hole of the bearing member in a state where the bearing member is press-fitted and fixed in the inner magnetic pole cylindrical portion of the motor, the bearing member presses the motor shaft against the motor shaft. Since the bearing member itself does not press-fit or contact the inner cylindrical portion of the magnetic pole inside the motor in the part that regulates the runout of the motor shaft, the bearing member does not deform and the motor shaft insertion hole does not deform. By receiving this, the bearing member can be prevented from interfering with the rotation of the motor shaft.
【００１１】第２の発明は、上記記載の第１の発明にお
ける軸受部材が圧入による変形・締めつけでモータ軸と
の接触部においてモータ回転軸を締めつけることがない
ようにモータ軸と軸受部材接触部の軸受部材外周部を内
側磁極内円筒部と接触しないよう軸受部材外周部に段差
を設けて外周を小さくするとともに、内側磁極内円筒部
に軸受部材外周部が圧入される部分のモータ軸挿入部を
圧入によるモータ軸締めつけが生じないように挿入部径
に段差を設けて円筒形状に広げ、モータ軸が軸受部材に
締めつけられない形状を有することでモータ軸の回転に
対し軸受部材がモータ軸の回転を妨げることがないよう
にすることができる。According to a second aspect of the present invention, the contact portion of the motor shaft and the bearing member does not tighten the motor rotating shaft at the contact portion with the motor shaft due to the deformation / tightening of the bearing member of the above-described first invention by press fitting. The outer circumference of the bearing member is provided with a step on the outer circumference of the bearing member so that the outer circumference does not come into contact with the inner magnetic pole cylindrical portion, and the outer circumference is reduced, and the outer peripheral portion of the bearing member is press-fitted into the inner magnetic pole cylindrical portion. To prevent the motor shaft from being tightened by press-fitting, a step is provided on the diameter of the insertion part so that it expands into a cylindrical shape. The rotation can be prevented.
【００１２】上記構成において、軸受部材をモータ内側
磁極内円筒部に圧入固定した状態でモータ軸を軸受部材
のモータ軸受挿入穴部に挿入してもモータ軸に対して軸
受部材がモータ軸をしめつけることがなく、モータ軸の
振れを規制する部分では軸受部材そのものがモータ内側
磁極内円筒部と圧入、接触しないことから軸受部材が変
形することなくモータ軸挿入穴部も変形をおこさずにモ
ータ軸を受けることでモータ軸の回転に対して軸受部材
がモータ軸の回転を妨げることがないようにすることが
できることである。In the above structure, even if the motor shaft is inserted into the motor bearing insertion hole of the bearing member in a state where the bearing member is press-fitted and fixed to the inner magnetic pole cylindrical portion of the motor, the bearing member presses the motor shaft against the motor shaft. Since the bearing member itself does not press-fit or contact the inner cylindrical portion of the magnetic pole inside the motor in the part that regulates the runout of the motor shaft, the bearing member does not deform and the motor shaft insertion hole does not deform. It is possible to prevent the bearing member from interfering with the rotation of the motor shaft by receiving the force.
【００１３】[0013]
【発明の実施の形態】（第１実施形態）図１は本発明の
第１実施形態のステッピングモータの軸受部分の拡大断
面図である。図１において、１は軸受部材、２は内側磁
極、３は外側磁極、４は巻線コイル、５はロータ、６は
モータ軸、７は軸受部材の内側磁極との圧入部、８は軸
受部材のモータ軸挿入部、９は軸受部材外周の内側磁極
との逃げ部、１０は軸受部材のモータ軸挿入部円錐形状
部である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is an enlarged sectional view of a bearing portion of a stepping motor according to a first embodiment of the present invention. In FIG. 1, 1 is a bearing member, 2 is an inner magnetic pole, 3 is an outer magnetic pole, 4 is a winding coil, 5 is a rotor, 6 is a motor shaft, 7 is a press-fitted portion of the bearing member with an inner magnetic pole, and 8 is a bearing member. Motor shaft insertion portion, 9 is a clearance portion with the inner magnetic pole on the outer periphery of the bearing member, and 10 is a conical portion of the motor shaft insertion portion of the bearing member.
【００１４】上記構成において、ロータ５が圧入あるい
は接着固定されたモータ軸６をモータ内に組み込み、位
置決めするために、外側磁極３と巻線コイル４を介して
圧入、あるいは接着などの固定手段を用いて組み込み固
定された内側磁極２の内径筒部に軸受部材１を挿入す
る。In the above structure, in order to incorporate and position the motor shaft 6 into which the rotor 5 is press-fitted or adhesively fixed, a fixing means such as press-fitting or adhesion via the outer magnetic pole 3 and the winding coil 4 is provided. The bearing member 1 is inserted into the inner diameter cylindrical portion of the inner magnetic pole 2 which is incorporated and fixed by using the bearing member 1.
【００１５】軸受部材１は、内部にモータ軸挿入部（モ
ータ軸を当接支持して軸受する部分）８とモータ軸挿入
円錐形状部（モータ軸とは非接触となるように形成され
た円錐形状のスペース部分）１０を有し、外部に内側磁
極２の内径筒部との圧入を目的とする内側磁極圧入部
（内側磁極に対して圧入嵌合される部分）７を有し、さ
らに外部に内側磁極の内径筒部に対する逃げ部（内側磁
極とは非接触となるように形成された円筒形状の縮径
部）９を有している。The bearing member 1 has a motor shaft insertion portion (a portion for supporting the motor shaft in contact therewith and bearing) 8 and a motor shaft insertion cone-shaped portion (a cone formed so as not to contact the motor shaft). A space portion 10 of a shape), an inner magnetic pole press-fitting portion (portion press-fitted to the inner magnetic pole) 7 for the purpose of press-fitting with the inner diameter cylindrical portion of the inner magnetic pole 2, and further external Has an escape portion (a cylindrical reduced diameter portion formed so as not to contact the inner magnetic pole) with respect to the inner diameter cylindrical portion of the inner magnetic pole.
【００１６】内側磁極２の内径部に軸受部材１を挿入す
ると、軸受部材の内側磁極との圧入部７が内側磁極２内
に圧入されることで、軸受部材１のモータ内での位置が
決まる。When the bearing member 1 is inserted into the inner diameter portion of the inner magnetic pole 2, the press-fitting portion 7 with the inner magnetic pole of the bearing member is pressed into the inner magnetic pole 2, so that the position of the bearing member 1 in the motor is determined. .
【００１７】その時に、軸受部材１は内側磁極２との圧
入力により、軸受部材１が有しているモータ軸挿入部８
やモータ軸挿入円錐形状部１０が圧縮されることにな
り、形成されている内部形状が収縮され、モータ軸挿入
部８が縮小されてモータ軸６との嵌合がキツくなること
でモータ軸６の作動を妨げることがある。このことを回
避するために、本実施形態ではモータ軸挿入部８を有す
る軸受部材１の外部に内側磁極との逃げ部９を形成する
ことで、軸受部材１と内側磁極２の圧入力がモータ軸挿
入部８には影響しないようにし、さらに内側磁極内径部
７に対して圧入される部分を有している軸受部材１は、
内部にモータ軸挿入部円錐形状部１０を有することで、
モータ軸と接触しないように円錐形に逃げていることで
内側磁極２との圧入力によりモータ軸挿入円錐形状部１
０が収縮してもモータ軸６に接触しないため、モータ軸
６の作動に影響しないようにしている。At that time, the bearing member 1 is pressed against the inner magnetic pole 2, and the motor shaft insertion portion 8 of the bearing member 1 is provided.
The motor shaft insertion conical portion 10 is compressed, the formed inner shape is contracted, the motor shaft insertion portion 8 is reduced, and the motor shaft 6 is fitted tightly. 6 may interfere with the operation. In order to avoid this, in the present embodiment, by forming the escape portion 9 with the inner magnetic pole on the outside of the bearing member 1 having the motor shaft insertion portion 8, the pressure input between the bearing member 1 and the inner magnetic pole 2 is the motor. The bearing member 1 that does not affect the shaft insertion portion 8 and has a portion that is press-fitted to the inner magnetic pole inner diameter portion 7 is
By having the motor shaft insertion portion conical portion 10 inside,
By escaping in a conical shape so as not to come into contact with the motor shaft, a force input with the inner magnetic pole 2 causes a conical portion 1 for inserting the motor shaft.
Even if 0 contracts, it does not contact the motor shaft 6, so that the operation of the motor shaft 6 is not affected.
【００１８】（第２実施形態）第１実施形態ではモータ
軸挿入円錐形状部を軸受部材に設けているが、第２実施
形態では、モータ軸挿入円錐形状部に代えて、モータ軸
挿入円筒形状部を軸受部材に設けていることである。以
下、第１実施形態と同様に詳述する。図２は本発明の第
２実施形態のステッピングモータの軸受部分の拡大断面
図である。図２において、１は軸受部材、２は内側磁
極、３は外側磁極、４は巻線コイル、５はロータ、６は
モータ軸、７は軸受部材の内側磁極との圧入部、８は軸
受部材のモータ軸挿入部、９は軸受部材外周の内側磁極
との逃げ部、１１は軸受部材のモータ軸挿入部円筒形状
部である。(Second Embodiment) In the first embodiment, the motor shaft inserting conical portion is provided on the bearing member, but in the second embodiment, instead of the motor shaft inserting conical portion, the motor shaft inserting conical portion is formed. That is, the portion is provided on the bearing member. Hereinafter, the details will be described in the same manner as the first embodiment. FIG. 2 is an enlarged sectional view of a bearing portion of a stepping motor according to the second embodiment of the present invention. In FIG. 2, 1 is a bearing member, 2 is an inner magnetic pole, 3 is an outer magnetic pole, 4 is a winding coil, 5 is a rotor, 6 is a motor shaft, 7 is a press-fitted portion of the bearing member with an inner magnetic pole, and 8 is a bearing member. Of the motor shaft, 9 is a clearance portion with the inner magnetic pole on the outer periphery of the bearing member, and 11 is a cylindrical portion of the motor shaft insertion portion of the bearing member.
【００１９】上記構成において、ロータ５が圧入、ある
いは接着固定されたモータ軸６をモータ内に組み込み、
位置決めするために、外側磁極３と巻線コイル４を介し
て圧入、あるいは接着などの固定手段を用いて組み込み
固定された内側磁極２の内径筒部に軸受部材１を挿入す
る。In the above structure, the motor shaft 6 in which the rotor 5 is press-fitted or adhered and fixed is incorporated into the motor,
In order to perform positioning, the bearing member 1 is inserted into the inner diameter cylindrical portion of the inner magnetic pole 2 which is press-fitted via the outer magnetic pole 3 and the winding coil 4 or fixedly incorporated by using fixing means such as adhesion.
【００２０】軸受部材１は、内部にモータ軸挿入部（モ
ータ軸を当接支持して軸受する部分）８とモータ軸挿入
円筒形状部（モータ軸とは非接触となるように形成され
た円筒形状のスペース部分）１１を有し、外部に内側磁
極２の内径筒部との圧入を目的とする内側磁極圧入部
（内側磁極に対して圧入嵌合される部分）７を有し、さ
らに外部に内側磁極の内側磁極に対する逃げ部（内側磁
極とは非接触となるように形成された円筒形状の縮径
部）９を有している。The bearing member 1 has a motor shaft insertion portion (a portion for supporting the motor shaft in contact therewith and bearing) 8 and a motor shaft insertion cylindrical portion (a cylinder formed so as not to contact the motor shaft). Space portion) 11 having a shape), and an inner magnetic pole press-fitting portion (portion that is press-fitted to the inner magnetic pole) 7 for the purpose of press-fitting with the inner diameter cylindrical portion of the inner magnetic pole 2 outside. Has an escape portion 9 (a cylindrical reduced diameter portion formed so as not to contact the inner magnetic pole) with respect to the inner magnetic pole.
【００２１】内側磁極２の内径部に軸受部材１を挿入す
ると、軸受部材の内側磁極との圧入部７が内側磁極２内
に圧入されることで、軸受部材１のモータ内での位置が
きまる。When the bearing member 1 is inserted into the inner diameter portion of the inner magnetic pole 2, the press-fitting portion 7 with the inner magnetic pole of the bearing member is pressed into the inner magnetic pole 2 so that the position of the bearing member 1 in the motor is determined. .
【００２２】その時に、軸受部材１は内側磁極２との圧
入力により、軸受部材１が有しているモータ軸挿入部８
やモータ軸挿入円筒形状部１１が圧縮されることにな
り、形成されている内部形状が収縮され、モータ軸挿入
部８が縮小されてモータ軸６との嵌合がキツくなること
でモータ軸６の作動を妨げることがある。このことを回
避するために、本実施形態ではモータ軸挿入部８を有す
る軸受部材１の外部に内側磁極との逃げ部９を有するこ
とで、軸受部材１と内側磁極２の圧入力がモータ軸挿入
部８には影響しないようにし、さらに内側磁極内径部７
に対して圧入される部分を有している軸受部材１は、内
部にモータ軸挿入部円筒形状部１１を有することで、モ
ータ軸と接触しないように円筒形に逃げていることで、
内側磁極２との圧入力によりモータ軸挿入円筒形状部１
１が収縮してもモータ軸６に接触しないため、モータ軸
６の作動に影響しないようにしている。At that time, the bearing member 1 is pressed against the inner magnetic pole 2 by a force, and the motor shaft insertion portion 8 of the bearing member 1 is provided.
And the motor shaft insertion cylindrical portion 11 is compressed, the formed inner shape is contracted, the motor shaft insertion portion 8 is reduced, and the motor shaft 6 is fitted tightly. 6 may interfere with the operation. In order to avoid this, in the present embodiment, the bearing member 1 having the motor shaft insertion portion 8 has an escape portion 9 with the inner magnetic pole outside the bearing member 1. The insertion portion 8 should not be affected, and the inner magnetic pole inner diameter portion 7
Since the bearing member 1 having the portion press-fitted with respect to has the motor shaft insertion portion cylindrical portion 11 inside, the bearing member 1 escapes in a cylindrical shape so as not to contact the motor shaft,
Cylindrical portion 1 for inserting the motor shaft by pressure input with the inner magnetic pole 2
Since the motor shaft 6 does not come into contact with the motor shaft 1 even when it contracts, the operation of the motor shaft 6 is not affected.
【００２３】[0023]
【発明の効果】以上説明したように、本出願に係る第１
の発明によれば、軸受部材をモータ内側磁極内円筒部に
圧入固定した状態でモータ軸を軸受部材のモータ軸受挿
入穴部に挿入してもモータ軸に対して軸受部材がモータ
軸を締め付けることがなく、モータ軸の振れを規制する
部分では軸受部材そのものがモータ内側磁極内円筒部と
圧入、接触しないことから軸受部材が変形することな
く、モータ軸挿入穴部も変形をおこさずにモータ軸を受
けることでモータ軸の回転に対して軸受部材がモータ軸
の回転を妨げることがないようにすることができること
である。As described above, the first aspect of the present application
According to the invention, even if the motor shaft is inserted into the motor bearing insertion hole of the bearing member while the bearing member is press-fitted and fixed to the inner magnetic pole cylindrical portion of the motor, the bearing member tightens the motor shaft with respect to the motor shaft. Since the bearing member itself does not press-fit or contact the inner magnetic pole cylinder inside the motor in the part that regulates the runout of the motor shaft, the bearing member does not deform, and the motor shaft insertion hole does not deform either. It is possible to prevent the bearing member from interfering with the rotation of the motor shaft by receiving the force.
【００２４】本出願に係る第２の発明によれば、軸受部
材をモータ内側磁極内円筒部に圧入固定した状態でモー
タ軸を軸受部材のモータ軸受挿入穴部に挿入してもモー
タ軸に対して軸受部材がモータ軸を締め付けることがな
く、モータ軸の振れを規制する部分では軸受部材そのも
のがモータ内側磁極内円筒部と圧入、接触しないことか
ら軸受部材が変形することなくモータ軸挿入穴部も変形
をおこさずにモータ軸を受けることでモータ軸の回転に
対して軸受部材がモータ軸の回転を妨げることがないよ
うにすることができることである。According to the second invention of the present application, even if the motor shaft is inserted into the motor bearing insertion hole of the bearing member in a state where the bearing member is press-fitted and fixed in the inner magnetic pole inner cylindrical portion of the motor, Since the bearing member does not tighten the motor shaft and restricts the runout of the motor shaft, the bearing member itself does not press fit into and contact the inner magnetic pole cylinder of the motor, so the bearing member does not deform and the motor shaft insertion hole Also, by receiving the motor shaft without causing deformation, it is possible to prevent the bearing member from interfering with the rotation of the motor shaft.
【図１】図１は本発明の第１実施形態のステッピングモ
ータの軸受部分の拡大断面図である。FIG. 1 is an enlarged cross-sectional view of a bearing portion of a stepping motor according to a first embodiment of the present invention.
【図２】図２は本発明の第２実施形態のステッピングモ
ータの軸受部分の拡大断面図である。FIG. 2 is an enlarged sectional view of a bearing portion of a stepping motor according to a second embodiment of the present invention.
【図３】図３は従来例のステッピングモータの軸受部分
の拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a bearing portion of a conventional stepping motor.
【図４】図４は、従来例のモータ全体の断面図である。FIG. 4 is a sectional view of an entire conventional motor.
１・・・軸受部材 ２・・・内側磁極 ３・・・外側磁極 ４・・・巻線コイル ５・・・ロータ ６・・・モータ軸 ７・・・軸受部材内側磁極圧入部 ８・・・軸受部材モータ軸挿入部 ９・・・軸受部材外周逃げ部 １０・・・軸受部材モータ軸挿入円錐形状部 １１・・・軸受部材モータ軸挿入円筒形状部 １２・・・モータ取付け板 １３・・・モータ軸回転方向軸受 １４・・・ワッシャ 1 ... Bearing member 2 ... Inner magnetic pole 3 ... Outer magnetic pole 4 ... Winding coil 5 ... rotor 6 ... Motor shaft 7: Magnetic pole press-fitting part inside bearing member 8: Bearing member Motor shaft insertion part 9 ... Bearing member outer peripheral clearance 10 ... Bearing member Motor shaft insertion cone shape part 11 ... Bearing member Motor shaft insertion cylindrical shape part 12: Motor mounting plate 13 ... Bearing in the direction of rotation of the motor shaft 14 ... washer
Claims (6)
分割して異なる極に交互に着磁されたロータを備え、該
ロータの軸方向に第１のコイルと前記ロータと第２のコ
イルとを順に配置し、第１のコイルにより励磁される第
１の外側磁極及び第１の内側磁極を前記ロータの一端側
の外周面及び内周面に対向させてロータの一端を挟み込
むと共に、第２コイルにより励磁される第２の外周磁極
及び第２の内側磁極を前記ロータの他端の外周面及び内
周面に対向させてロータの他端を挟み込むようにし、か
つ第１の外側磁極と第２の外側磁極に対して内周面で嵌
合して連結する連結リングを備え、モータ軸をモータ内
部で受ける軸受部材をモータ内のある一端の内側磁極内
円筒空部にて圧入固定するモータにおいて、 前記軸受部材が圧入による変形・締めつけでモータ軸と
の接触部においてモータ回転軸を締めつけることがない
ようにモータ軸と軸受部材接触部の軸受部材外周部を内
側磁極内円筒部と接触しないよう軸受部材外周部に段差
を設けて外周を小さくするとともに、内側磁極内円筒部
に軸受部材外周部が圧入される部分のモータ軸挿入部を
圧入によるモータ軸締めつけが生じないように挿入部径
を円錐形状に広げ、モータ軸が軸受部材に締めつけられ
ない形状を有することを特徴とするステッピングモー
タ。1. Formed in a cylindrical shape, and n in the circumferential direction.
A first rotor is provided which is divided and is alternately magnetized to different poles. The first coil, the rotor, and the second coil are sequentially arranged in the axial direction of the rotor, and the first coil is excited by the first coil. The outer magnetic pole and the first inner magnetic pole are opposed to the outer peripheral surface and the inner peripheral surface on the one end side of the rotor so as to sandwich one end of the rotor, and the second outer magnetic pole and the second inner side are excited by the second coil. The magnetic pole is opposed to the outer peripheral surface and the inner peripheral surface of the other end of the rotor so that the other end of the rotor is sandwiched, and the first outer magnetic pole and the second outer magnetic pole are fitted on the inner peripheral surface. In a motor having a coupling ring for coupling, which press-fits and fixes a bearing member that receives the motor shaft inside the motor in a cylindrical hollow portion inside an inner magnetic pole at one end inside the motor, the bearing member is deformed and tightened by press-fitting to the motor shaft. Motor rotation at the contact part of In order to prevent the shaft from being tightened, a step is provided on the outer peripheral portion of the bearing member so that the outer peripheral portion of the bearing member contacting portion of the bearing member does not come into contact with the inner cylindrical portion of the inner magnetic pole. The outer diameter of the bearing member is press-fitted into the motor shaft insertion part, the diameter of the insertion part is expanded to a conical shape so that the motor shaft is not tightened by press fitting, and the motor shaft has a shape that cannot be tightened on the bearing member. And stepping motor.
分割して異なる極に交互に着磁されたロータを備え、該
ロータの軸方向に第１のコイルと前記ロータと第２のコ
イルとを順に配置し、第１のコイルにより励磁される第
１の外側磁極及び第１の内側磁極を前記ロータの一端側
の外周面及び内周面に対向させてロータの一端を挟み込
むと共に、第２コイルにより励磁される第２の外周磁極
及び第２の内側磁極を前記ロータの他端の外周面及び内
周面に対向させてロータの他端を挟み込むようにし、か
つ第１の外側磁極と第２の外側磁極に対して内周面で嵌
合して連結する連結リングを備え、モータ軸をモータ内
部で受ける軸受部材をモータ内のある一端の内側磁極内
円筒空部にて圧入固定するモータにおいて、 前記軸受部材が圧入による変形・締めつけでモータ軸と
の接触部においてモータ回転軸を締めつけることがない
ようにモータ軸と軸受部材接触部の軸受部材外周部を内
側磁極内円筒部と接触しないよう軸受部材外周部に段差
を設けて外周を小さくするとともに、内側磁極内円筒部
に軸受部材外周部が圧入される部分のモータ軸挿入部を
圧入によるモータ軸締めつけが生じないように挿入部径
を段差を設けて円筒形状に広げ、モータ軸が軸受部材に
締めつけられない形状を有することを特徴とするステッ
ピングモータ。2. Formed in a cylindrical shape, and n in the circumferential direction.
A first rotor is provided which is divided and is alternately magnetized to different poles. The first coil, the rotor, and the second coil are sequentially arranged in the axial direction of the rotor, and the first coil is excited by the first coil. The outer magnetic pole and the first inner magnetic pole are opposed to the outer peripheral surface and the inner peripheral surface on the one end side of the rotor so as to sandwich one end of the rotor, and the second outer magnetic pole and the second inner side are excited by the second coil. The magnetic pole is opposed to the outer peripheral surface and the inner peripheral surface of the other end of the rotor so that the other end of the rotor is sandwiched, and the first outer magnetic pole and the second outer magnetic pole are fitted on the inner peripheral surface. In a motor having a coupling ring for coupling, which press-fits and fixes a bearing member that receives the motor shaft inside the motor in a cylindrical hollow portion inside an inner magnetic pole at one end inside the motor, the bearing member is deformed and tightened by press-fitting to the motor shaft. Motor rotation at the contact part of In order to prevent the shaft from being tightened, a step is provided on the outer peripheral portion of the bearing member so that the outer peripheral portion of the bearing member contacting portion of the bearing member does not come into contact with the inner cylindrical portion of the inner magnetic pole. The motor shaft insertion part where the outer peripheral part of the bearing member is press-fitted is formed into a cylindrical shape with a step so that the motor shaft is not tightened by press fitting so that the motor shaft cannot be tightened on the bearing member. A stepping motor having.
受部材を圧入して支持する支持手段とを有するモータに
おいて、 前記軸受部材は、内部に、モータ軸と当接して支持する
軸受部分と、モータ軸と非接触状態となるように形成さ
れたスペース手段とを有し、外部に、前記支持手段によ
って圧入状態で支持される圧入部と、前記支持手段と非
接触状態になるように形成された縮径部と、を有し、前
記スペース手段と前記縮径部は、前記支持手段によって
前記軸受部材の圧入部に加えられる締め付け力を前記軸
受部材の軸受部分に及ぼさないことを特徴とするモー
タ。3. A motor having a bearing member for bearing a motor shaft, and a support means for press-fitting and supporting the bearing member therein, wherein the bearing member internally supports a bearing in contact with the motor shaft. And a space means formed so as to be in non-contact with the motor shaft, the press-fitting portion being supported by the support means in a press-fitted state, and the space means so as not to be in contact with the support means. A formed reduced diameter portion, wherein the space means and the reduced diameter portion do not exert a tightening force applied to the press-fitted portion of the bearing member by the supporting means on the bearing portion of the bearing member. And a motor.
手段はモータのロータのマグネットに作用する内側磁極
であることを特徴とするモータ。4. The motor according to claim 3, wherein the support means is an inner magnetic pole that acts on a magnet of a rotor of the motor.
ース手段は円錐形状の広がりを持つスペースであること
を特徴とするモータ。5. The motor according to claim 3, wherein the space means is a space having a conical shape.
ース手段は円筒形状のスペースであることを特徴とする
モータ。6. The motor according to claim 3, wherein the space means is a cylindrical space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001228959A JP2003047227A (en) | 2001-07-30 | 2001-07-30 | Stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001228959A JP2003047227A (en) | 2001-07-30 | 2001-07-30 | Stepping motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003047227A true JP2003047227A (en) | 2003-02-14 |
Family
ID=19061380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001228959A Pending JP2003047227A (en) | 2001-07-30 | 2001-07-30 | Stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003047227A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565724A (en) * | 2013-04-03 | 2018-01-09 | 发那科株式会社 | Rotor component, the rotor for possessing rotor component and its manufacture method and electric rotating machine |
-
2001
- 2001-07-30 JP JP2001228959A patent/JP2003047227A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565724A (en) * | 2013-04-03 | 2018-01-09 | 发那科株式会社 | Rotor component, the rotor for possessing rotor component and its manufacture method and electric rotating machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1717930B1 (en) | Electric actuator and a motor used therein | |
| JPH08266030A (en) | Rotor device of brushless motor | |
| JP4280542B2 (en) | Stepping motor | |
| JPH10213132A (en) | Rotor structure and polygon scanner using rotor structure | |
| JP4003694B2 (en) | Manufacturing method of magnet type motor | |
| JP2003047227A (en) | Stepping motor | |
| JP2002027726A (en) | Stepping motor | |
| JP2005020857A (en) | Stepping motor | |
| JP2005192385A (en) | Spindle motor | |
| JP2018129933A (en) | Motor and method for manufacturing motor | |
| JP2002233120A (en) | Electromagnetic rotating machine | |
| JPH09117121A (en) | Generator for bicycle | |
| JP3246490B2 (en) | Vibration generating motor | |
| JP2000069735A (en) | Outer-rotor brushless motor | |
| JP2932881B2 (en) | Electric motor | |
| JP2584369Y2 (en) | Resin bearing device | |
| JPH0731089A (en) | Rotor with permanent magnet | |
| JPH11299206A (en) | Brushless motor | |
| JP2999581B2 (en) | Spindle motor | |
| JPH0638416A (en) | Fixing structure for rotor magnet | |
| JP2600602Y2 (en) | Rotor | |
| JPH07236249A (en) | Spindle motor | |
| JPH07192387A (en) | Small motor | |
| JP2003235235A (en) | Stepping motor | |
| JP2002287073A (en) | Deflecting scanner |