JP2019213347A - Electric motor - Google Patents
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- JP2019213347A JP2019213347A JP2018107631A JP2018107631A JP2019213347A JP 2019213347 A JP2019213347 A JP 2019213347A JP 2018107631 A JP2018107631 A JP 2018107631A JP 2018107631 A JP2018107631 A JP 2018107631A JP 2019213347 A JP2019213347 A JP 2019213347A
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- 239000002184 metal Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Abstract
Description
本発明は、内側面に永久磁石が相対向して設けられた円筒形のフレームと、該フレームの一端を覆うエンドカバーと、該エンドカバーに設けられたブラシが取り付けられるホルダとを備えた電動モータに関する。 The present invention includes an electric motor comprising a cylindrical frame provided with permanent magnets facing each other on an inner surface, an end cover covering one end of the frame, and a holder to which a brush provided on the end cover is attached. It relates to the motor.
従来、この種の電動モータとしては、円筒形のフレームに２つの永久磁石が相対向して設けられた２極モータと、４つの永久磁石が相対向して設けられた４極モータとがある。２極モータと４極モータとを比較した場合、２極モータの方が回転時に振動および騒音がより発生しづらいことが知られている。 Conventionally, this type of electric motor includes a two-pole motor in which two permanent magnets are provided facing each other on a cylindrical frame, and a four-pole motor in which four permanent magnets are provided facing each other. . When comparing a two-pole motor and a four-pole motor, it is known that vibration and noise are less likely to occur when the two-pole motor rotates.
特許文献１では、４極モータにおいてエンドカバーにおけるコネクタ部の構造を改善することで、コネクタ部の固定をより確実にしている。すなわち、エンドカバーにはフレームの端部に接続される筒状の筒状部と、筒状部の一端を閉蓋する蓋部と、コネクタが接続されるコネクタ部と、コネクタ部が着脱自在に取り付けられる挿入口とを有し、この挿入口は、筒状部を貫通すると共に蓋部の一部を含むように貫通し、挿入口に取り付けられたコネクタ部が蓋部に突き当たって固定される突き当り面を有している。 In Patent Document 1, the connector part is more reliably fixed by improving the structure of the connector part in the end cover in the four-pole motor. That is, the end cover has a cylindrical cylindrical portion connected to the end portion of the frame, a lid portion that closes one end of the cylindrical portion, a connector portion to which the connector is connected, and a connector portion that is detachable The insertion port penetrates through the cylindrical portion and includes a part of the lid portion, and the connector portion attached to the insertion port hits the lid portion and is fixed. It has a butting surface.
しかし、安定した電動モータの稼働を行うためには、モータ回転時の振動などによるモータの端子における電気的接続の不安定性を解消させる必要がある。 However, in order to perform stable operation of the electric motor, it is necessary to eliminate the instability of the electrical connection at the motor terminal due to vibration during rotation of the motor.
本発明は、端子における電気的接続の安定性を向上させたコネクタ構造を有する電動モータを提供することを目的とする。 An object of this invention is to provide the electric motor which has a connector structure which improved the stability of the electrical connection in a terminal.
第１発明の電動モータは、内側面に永久磁石が相対向して設けられた円筒形のフレームと、該フレームの一端を覆うエンドカバーと、該エンドカバーに設けられ少なくとも一対のブラシが取り付けられるホルダとを備えた電動モータであって、
前記エンドカバーは、前記フレームの端部に接続される筒状の筒状部と、該筒状部の一端を閉塞する蓋部と、前記ブラシに電気的に接続された端子が取り付けられたコネクタ部と、該コネクタ部が脱着自在に取り付けられるコネクタ受け部とを有し、
前記コネクタ受け部が、前記蓋部に向かって前記筒状部を切り欠いた切り欠き部と、該切り欠き部に前記蓋部に向かって形成された第１係合部とを有すると共に、前記コネクタ部が、前記第１係合部に係合する第１係合受け部を有して前記切り欠き部に嵌合する構造において、
前記コネクタ受け部に嵌合した前記コネクタ部が前記蓋部の一部に突き当たって固定される突き当たり部を有することを特徴とする。
An electric motor according to a first aspect of the invention is provided with a cylindrical frame provided with permanent magnets facing each other on an inner surface, an end cover covering one end of the frame, and at least a pair of brushes provided on the end cover. An electric motor comprising a holder,
The end cover includes a cylindrical cylindrical portion connected to an end portion of the frame, a lid portion that closes one end of the cylindrical portion, and a connector to which a terminal electrically connected to the brush is attached. A connector receiving portion to which the connector portion is detachably attached,
The connector receiving portion includes a cutout portion in which the tubular portion is cut out toward the lid portion, and a first engagement portion formed in the cutout portion toward the lid portion, and In the structure in which the connector portion has a first engagement receiving portion that engages with the first engagement portion and fits into the notch portion,
The connector part fitted to the connector receiving part has a contact part fixed to a part of the lid part.
第１発明の電動モータによれば、コネクタ部をエンドカバーに装着するに際し、筒状部を切り欠いて設けた切り欠き部に形成された第１係合部に対して、コネクタ部に設けた第１係合受け部を嵌合させるので、コネクタ部が嵌合する方向とは垂直な方向（エンドカバーにおける周方向および半径方向）の自由度を抑制することができ、コネクタ部のがたつきを低減することができる。 According to the electric motor of the first invention, when the connector portion is mounted on the end cover, the connector portion is provided with respect to the first engaging portion formed in the notched portion provided by cutting out the cylindrical portion. Since the first engagement receiving portion is fitted, the degree of freedom in the direction perpendicular to the direction in which the connector portion is fitted (the circumferential direction and the radial direction in the end cover) can be suppressed, and the rattling of the connector portion can be suppressed. Can be reduced.
また、コネクタ部が突き当たり部に突き当たって固定されるため、コネクタ部が嵌合する方向の自由度を抑制することができるので、コネクタ部のがたつきを低減することができる。 In addition, since the connector portion abuts against the abutting portion and is fixed, the degree of freedom in the direction in which the connector portion is fitted can be suppressed, so that rattling of the connector portion can be reduced.
このように、第１発明の電動モータによれば、コネクタ部をエンドカバーに確実に固定することができる。 Thus, according to the electric motor of the first invention, the connector portion can be reliably fixed to the end cover.
第２発明の電動モータは、第１発明の電動モータにおいて、
前記切り欠き部および前記第１係合部が、前記筒状部から前記蓋部の一部に亘って形成されていることを特徴とする。
The electric motor of the second invention is the electric motor of the first invention,
The cutout portion and the first engagement portion are formed from the cylindrical portion to a part of the lid portion.
第２発明の電動モータによれば、上記の構成とすることにより、コネクタ部とエンドカバーとの嵌合部分がより大きくなるため、より確実にコネクタ部のがたつきを低減することができる。 According to the electric motor of the second invention, by adopting the above configuration, the fitting portion between the connector portion and the end cover becomes larger, so that rattling of the connector portion can be more reliably reduced.
第３発明の電動モータは、第２発明の電動モータにおいて、
前記コネクタ受け部が、前記切り欠き部の前記筒状部側に前記蓋部に向かって形成された第２係合部を有すると共に、前記コネクタ部が、該第２係合部に係合する第２係合受け部を有することを特徴とする。
The electric motor of the third invention is the electric motor of the second invention,
The connector receiving portion has a second engaging portion formed toward the lid portion on the cylindrical portion side of the notch portion, and the connector portion engages with the second engaging portion. It has the 2nd engagement receiving part, It is characterized by the above-mentioned.
第３発明の電動モータによれば、第１係合部、第１係合受け部に加えて第２係合部、第２係合受け部を設けることにより、コネクタ部をエンドカバーによりスムーズに装着することができ、より確実にコネクタ部のがたつきを低減することができる。 According to the electric motor of the third aspect of the invention, by providing the second engaging portion and the second engaging receiving portion in addition to the first engaging portion and the first engaging receiving portion, the connector portion can be made smoother by the end cover. It can be attached, and rattling of the connector portion can be reduced more reliably.
第４発明の電動モータは、第1乃至第３発明の電動モータにおいて、
前記コネクタ部は、前記第１係合部および前記第１係合受け部に沿って該コネクタ部が嵌合する方向とは垂直な方向に、前記端子を挟み込むスリットが形成されていることを特徴とする。
The electric motor of the fourth invention is the electric motor of the first to third inventions,
The connector portion includes a slit that sandwiches the terminal in a direction perpendicular to a direction in which the connector portion is fitted along the first engagement portion and the first engagement receiving portion. And
第４発明の電動モータによれば、ブラシに電気的に接続された端子の一部がこのスリットに挟み込まれた構成とすることにより、コネクタ部における端子の固定をより確実なものとすることができる。 According to the electric motor of the fourth invention, it is possible to secure the terminal in the connector portion more reliably by adopting a configuration in which a part of the terminal electrically connected to the brush is sandwiched between the slits. it can.
図１および図２を参照して、本実施形態の電動モータの構成について説明する。 With reference to FIG. 1 and FIG. 2, the structure of the electric motor of this embodiment is demonstrated.
本実施形態の電動モータは、フレーム１と、エンドカバー２と、エンドカバー２に設けけられるホルダ３とを備える。 The electric motor of the present embodiment includes a frame 1, an end cover 2, and a holder 3 provided on the end cover 2.
フレーム１は、円筒形状の金属製の部材であって、内側面に複数の永久磁石１０が設けられている。 The frame 1 is a cylindrical metal member, and a plurality of permanent magnets 10 are provided on the inner surface.
フレーム１は、一端側に、エンドカバー２を固定するための複数のエンドカバー嵌合部１１を備え、フレーム１の他端側はモータ保持部６により閉塞されている。 The frame 1 includes a plurality of end cover fitting portions 11 for fixing the end cover 2 on one end side, and the other end side of the frame 1 is closed by a motor holding portion 6.
エンドカバー２は合成樹脂製の部材であって、フレーム１の一端側に接続される筒状の筒状部２１と、筒状部２１の一端を閉蓋する蓋部２２と、ブラシ５に電気的に接続された端子４が取り付けられたコネクタ部２３と、コネクタ部２３が脱着自在に取り付けられるコネクタ受け部２４とを備える。 The end cover 2 is a member made of synthetic resin, and is electrically connected to the cylindrical cylindrical portion 21 connected to one end side of the frame 1, the lid portion 22 that closes one end of the cylindrical portion 21, and the brush 5. The connector part 23 to which the terminal 4 connected in general is attached, and the connector receiving part 24 to which the connector part 23 is detachably attached are provided.
筒状部２１には、フレーム１に嵌合する嵌合部２１１が形成されており、周方向の一部にはコネクタ部２３と係合するコネクタ受け部２４が設けられている。 The tubular portion 21 is formed with a fitting portion 211 that is fitted to the frame 1, and a connector receiving portion 24 that is engaged with the connector portion 23 is provided in a part of the circumferential direction.
また、筒状部２１の外周面から中心に向かって２か所のホルダ３が設けられている。ホルダ３にはブラシ５が装填され、電動モータ稼働時には、ブラシ５は端子４を介して（図示しない）外部電源と導通している。この２か所のホルダ３は電動モータの回転軸を中心として約９０度の角度を成しており、２極モータを構成している。 Further, two holders 3 are provided from the outer peripheral surface of the cylindrical portion 21 toward the center. The holder 3 is loaded with a brush 5, and the brush 5 is electrically connected to an external power source (not shown) via the terminal 4 when the electric motor is in operation. These two holders 3 form an angle of about 90 degrees around the rotating shaft of the electric motor, and constitute a two-pole motor.
蓋部２２は筒状部２１の一端側を閉塞しており、蓋部２２には後ろ側の軸受けとしての貫通孔２２０が形成されている。 The lid portion 22 closes one end side of the cylindrical portion 21, and a through hole 220 as a rear bearing is formed in the lid portion 22.
コネクタ部２３はエンドカバー２と同様の合成樹脂製の本体２３０と金属製の端子４とからなり、エンドカバー２のコネクタ受け部２４にスライド自在に取り付けられる。 The connector portion 23 includes a synthetic resin main body 230 and metal terminals 4 similar to the end cover 2, and is slidably attached to the connector receiving portion 24 of the end cover 2.
コネクタ部２３には、コネクタ受け部２４との嵌合面の周方向の両側面に、蓋部２２に向かって形成された凸溝状の第１係合受け部２３２を有しており、さらに第１係合受け部２３２よりも筒状部２１側に凸溝状の第２係合受け部２３３が形成されている。 The connector part 23 has convex groove-shaped first engagement receiving parts 232 formed toward the cover part 22 on both sides in the circumferential direction of the fitting surface with the connector receiving part 24, and A convex-shaped second engagement receiving portion 233 is formed closer to the cylindrical portion 21 than the first engagement receiving portion 232.
また、コネクタ部２３には金属製の端子４を挟み込むスリット２３１が２箇所設けられており、端子４は合成樹脂製のコネクタ部２３の本体２３０に確実に固定されている。ここでスリット２３１はコネクタ部２３が嵌合する方向と垂直な方向に形成されており、端子４のブラシ５側の端部は同様にコネクタ部２３が嵌合する方向と垂直な方向に形成されているが、（図示しない）外部電源側の端部は筒状部２１の外周の接線方向に形成されている。 The connector portion 23 is provided with two slits 231 for sandwiching the metal terminal 4, and the terminal 4 is securely fixed to the main body 230 of the synthetic resin connector portion 23. Here, the slit 231 is formed in a direction perpendicular to the direction in which the connector portion 23 is fitted, and the end of the terminal 4 on the brush 5 side is similarly formed in a direction perpendicular to the direction in which the connector portion 23 is fitted. However, the end on the external power source side (not shown) is formed in the tangential direction of the outer periphery of the cylindrical portion 21.
従来の電動モータにおいては、コネクタ部において端子を固定するには、所定の形状の端子をかしめたり、合成樹脂製の本体に対して端子をインサート成形したりしていたが、本実施態様においては、端子４は金属の薄板を加工しただけの構成であり、加工が容易で、安価かつ寸法精度に優れている。また、端子４はスリット２３１に確実に挟み込まれているので、端子４はコネクタ部２３に確実に固定される。 In the conventional electric motor, in order to fix the terminal in the connector portion, the terminal of a predetermined shape is caulked or the terminal is insert-molded with respect to the synthetic resin main body. The terminal 4 has a configuration obtained by processing a thin metal plate, is easily processed, is inexpensive, and has excellent dimensional accuracy. Further, since the terminal 4 is securely held in the slit 231, the terminal 4 is securely fixed to the connector portion 23.
なお、本実施態様においては上記のような端子４の形状としたが、端子４の両端部、特に（図示しない）外部電源側の端部は様々な形状を採ることが可能であり、従来のように（図示しない）外部電源との接続方向が、本発明におけるコネクタ部２３が嵌合する方向と垂直な方向（電動モータの回転軸に垂直な方向）に限定されることはない。 In the present embodiment, the shape of the terminal 4 is as described above. However, both ends of the terminal 4, in particular, the end on the side of the external power source (not shown) can take various shapes. Thus, the connection direction with an external power source (not shown) is not limited to the direction perpendicular to the direction in which the connector portion 23 is fitted in the present invention (the direction perpendicular to the rotating shaft of the electric motor).
コネクタ受け部２４は筒状部２１の周方向の一部分を蓋部２２に向かって切り欠いた構造となっており、この切り欠き部２４１には、コネクタ部２３との嵌合面の周方向の両端面に、蓋部２２に向かって形成された凹溝状の第１係合部２４２を有しており、さらに第１係合部２４２よりも筒状部２１側に凹溝状の第２係合部２４３が形成されている。 The connector receiving portion 24 has a structure in which a portion of the cylindrical portion 21 in the circumferential direction is cut out toward the lid portion 22, and the cutout portion 241 has a circumferential surface of the fitting surface with the connector portion 23. Both end faces have a first groove-shaped first engaging portion 242 formed toward the lid portion 22, and a second groove-shaped second engaging portion closer to the cylindrical portion 21 than the first engaging portion 242. An engaging portion 243 is formed.
この切り欠き部２４１および第１係合部２４２は筒状部２１から蓋部２２の一部に亘って形成されており、蓋部２２の一部には、コネクタ部２３が嵌合して突き当たって固定される突き当たり部２２１を有している。 The notch portion 241 and the first engagement portion 242 are formed from the cylindrical portion 21 to a part of the lid portion 22, and the connector portion 23 is fitted and abutted against a part of the lid portion 22. And abutment portion 221 that is fixed in place.
また本実施態様においては、コネクタ受け部２４とコネクタ部２３との嵌合面にもそれぞれスライドのガイドとなる凹凸溝が形成されており、また、筒状部２１の内面にもコネクタ部２３が嵌合して突き当たる内面突き当たり部２２２を有している。 In the present embodiment, concave and convex grooves that serve as slide guides are also formed on the mating surfaces of the connector receiving portion 24 and the connector portion 23, and the connector portion 23 is also formed on the inner surface of the tubular portion 21. It has an inner surface abutting portion 222 that fits and strikes.
なお、本実施態様においては、第１係合受け部２３２および第２係合受け部２３３を凸溝状とし、第１係合部２４２および第２係合部２４３を凹溝状としたが、これらの溝形状を逆の関係としてもよい。また、溝の断面形状は様々に選択可能である。 In this embodiment, the first engagement receiving portion 232 and the second engagement receiving portion 233 have a convex groove shape, and the first engagement portion 242 and the second engagement portion 243 have a concave groove shape. These groove shapes may be reversed. Moreover, the cross-sectional shape of a groove | channel can be selected variously.
また、本実施態様においては、図示したように突き当たり部２２１が平面である場合について説明したが、突き当たり部２２１の形状はこれに限定されるものではない。 Moreover, in this embodiment, although the case where the contact part 221 was a plane was illustrated as illustrated, the shape of the contact part 221 is not limited to this.
続いて本実施態様の電動モータの組み立て方法について、エンドカバー２を中心に説明する。 Next, an assembly method of the electric motor according to the present embodiment will be described focusing on the end cover 2.
コネクタ部２３の端子４のブラシ５側の端部は、ピグテル線を介してブラシ５に接続されている。ブラシ５は（図示しない）付勢手段により、電動モータ回転の半径方向に付勢される。 The end of the terminal 4 of the connector 23 on the brush 5 side is connected to the brush 5 via a pigtel wire. The brush 5 is biased in the radial direction of the rotation of the electric motor by biasing means (not shown).
コネクタ部２３はコネクタ受け部２４の切り欠き部２４１から、第１係合受け部２３２および第２係合受け部２３３と第１係合部２４２および第２係合部２４３とを合わせ、スライドさせて突き当たり部２２１まで押し込まれる。 The connector portion 23 is slid from the notch portion 241 of the connector receiving portion 24 by aligning the first engaging receiving portion 232 and the second engaging receiving portion 233 with the first engaging portion 242 and the second engaging portion 243. Then, the contact portion 221 is pushed in.
次に、フレーム１の一端側に形成された複数のエンドカバー嵌合部１１と、筒状部２１に形成された嵌合部２１１との位置を合わせ、フレーム１をエンドカバー２の筒状部２１に嵌合させる。これにより、コネクタ部２３はエンドカバー２に確実に固定される。 Next, the positions of the plurality of end cover fitting portions 11 formed on one end side of the frame 1 and the fitting portions 211 formed on the tubular portion 21 are aligned, and the frame 1 is attached to the tubular portion of the end cover 2. 21 is fitted. Thereby, the connector part 23 is reliably fixed to the end cover 2.
こうしてコネクタ部２３がエンドカバー２に固定されたことで、切り欠き部２４１がコネクタ部２３によって埋められたような形状となり、端子４の（図示しない）外部電源側の端部は筒状部２１から突出した形となるので、（図示しない）外部電源との電気的接続が容易に可能となる。 By fixing the connector portion 23 to the end cover 2 in this way, the cutout portion 241 is shaped so as to be filled with the connector portion 23, and the end of the terminal 4 on the external power supply side (not shown) is the cylindrical portion 21. Therefore, it is possible to easily connect to an external power source (not shown).
以上の本実施態様によれば、端子４を含むコネクタ部２３がエンドカバー２に確実に固定されるので、電動モータにおいて、端子４における電気的接続の安定性を向上させることができる。 According to the above embodiment, since the connector portion 23 including the terminal 4 is securely fixed to the end cover 2, the stability of electrical connection at the terminal 4 can be improved in the electric motor.
なお、本実施態様においては、２極モータを例に説明したが、これに限定されるものではなく、電動モータは４極モータであってもよい。 In this embodiment, a two-pole motor has been described as an example. However, the present invention is not limited to this, and the electric motor may be a four-pole motor.
さらに、本実施態様においては、ホルダ３はエンドカバー２に設けられた一体型の形態としたが、ホルダ３が別体の部材であってもよい。 Furthermore, in the present embodiment, the holder 3 is an integral type provided on the end cover 2, but the holder 3 may be a separate member.
１…フレーム、２…エンドカバー、３…ホルダ、４…端子、２１…筒状部、２２…蓋部、２３…コネクタ部、２４…コネクタ受け部、２２１…突き当たり部、２３１…スリット、２３２…第１係合受け部、２３３…第２係合受け部、２４１…切り欠き部、２４２…第１係合部、２４３…第２係合部。 DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... End cover, 3 ... Holder, 4 ... Terminal, 21 ... Cylindrical part, 22 ... Cover part, 23 ... Connector part, 24 ... Connector receiving part, 221 ... Butting part, 231 ... Slit, 232 ... 1st engagement receiving part, 233 ... 2nd engagement receiving part, 241 ... Notch part, 242 ... 1st engagement part, 243 ... 2nd engagement part.
Claims (4)
前記エンドカバーは、前記フレームの端部に接続される筒状の筒状部と、該筒状部の一端を閉塞する蓋部と、前記ブラシに電気的に接続された端子が取り付けられたコネクタ部と、該コネクタ部が脱着自在に取り付けられるコネクタ受け部とを有し、
前記コネクタ受け部が、前記蓋部に向かって前記筒状部を切り欠いた切り欠き部と、該切り欠き部に前記蓋部に向かって形成された第１係合部とを有すると共に、前記コネクタ部が、前記第１係合部に係合する第１係合受け部を有して前記切り欠き部に嵌合する構造において、
前記コネクタ受け部に嵌合した前記コネクタ部が前記蓋部の一部に突き当たって固定される突き当たり部を有することを特徴とする電動モータ。 An electric motor comprising a cylindrical frame provided with permanent magnets facing each other on an inner surface, an end cover that covers one end of the frame, and a holder that is provided on the end cover and to which at least a pair of brushes are attached. There,
The end cover includes a cylindrical cylindrical portion connected to an end portion of the frame, a lid portion that closes one end of the cylindrical portion, and a connector to which a terminal electrically connected to the brush is attached. A connector receiving portion to which the connector portion is detachably attached,
The connector receiving portion has a notch portion in which the cylindrical portion is cut out toward the lid portion, and a first engagement portion formed in the notch portion toward the lid portion, and In the structure in which the connector portion has a first engagement receiving portion that engages with the first engagement portion and fits into the notch portion,
An electric motor comprising: an abutting portion in which the connector portion fitted to the connector receiving portion abuts against a part of the lid portion and is fixed.
前記切り欠き部および前記第１係合部が、前記筒状部から前記蓋部の一部に亘って形成されていることを特徴とする電動モータ。 The electric motor according to claim 1, wherein
The electric motor, wherein the cutout portion and the first engagement portion are formed from the cylindrical portion to a part of the lid portion.
前記コネクタ受け部が、前記切り欠き部の前記筒状部側に前記蓋部に向かって形成された第２係合部を有すると共に、前記コネクタ部が、該第２係合部に係合する第２係合受け部を有することを特徴とする電動モータ。 The electric motor according to claim 2,
The connector receiving portion has a second engaging portion formed toward the lid portion on the cylindrical portion side of the notch portion, and the connector portion engages with the second engaging portion. An electric motor comprising a second engagement receiving portion.
前記コネクタ部は、前記第１係合部および前記第１係合受け部に沿って該コネクタ部が嵌合する方向とは垂直な方向に、前記端子を挟み込むスリットが形成されていることを特徴とする電動モータ。
The electric motor according to any one of claims 1 to 3,
The connector portion includes a slit that sandwiches the terminal in a direction perpendicular to a direction in which the connector portion is fitted along the first engagement portion and the first engagement receiving portion. An electric motor.
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| JP2003009459A (en) * | 2001-06-25 | 2003-01-10 | Asmo Co Ltd | Waterproof structure of motor |
| JP2005333748A (en) * | 2004-05-20 | 2005-12-02 | Yazaki Corp | Waterproof structure of motor |
| JP2014033540A (en) * | 2012-08-03 | 2014-02-20 | Denso Corp | Rotating electrical machine and electric power steering apparatus using the same |
| JP2014110697A (en) * | 2012-12-03 | 2014-06-12 | Mitsuba Corp | Electric motor |
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