JP2010288383A - Electric motor including reduction gear mechanism - Google Patents

Electric motor including reduction gear mechanism Download PDF

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JP2010288383A
JP2010288383A JP2009140689A JP2009140689A JP2010288383A JP 2010288383 A JP2010288383 A JP 2010288383A JP 2009140689 A JP2009140689 A JP 2009140689A JP 2009140689 A JP2009140689 A JP 2009140689A JP 2010288383 A JP2010288383 A JP 2010288383A
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reduction mechanism
speed reduction
motor
electric motor
connector
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JP5522978B2 (en
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Michio Takahashi
道夫 高橋
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Mitsuba Corp
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Mitsuba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise to signal lines of connectors for external connection, and to prevent a reduction in size from being hindered in electric motors including reduction gear mechanisms. <P>SOLUTION: The electric motor 1 including reduction gear mechanisms includes a control substrate 11 equipped with drive and control elements 11a, 11b for controlling drive of a motor section 2 between a gear case 9 of a reduction gear mechanism section 7 and a cover body 10. In the electric motor 1 including reduction gear mechanisms, the control substrate 11 is extended toward one side where a worm wheel 8 is arranged on the basis of the arrangement side of a worm gear 6, and toward the other side. The drive element 11a is concentrically arranged at the other side of the control substrate 11. A connector 10b, which is provided in the cover body 10 and connects the inside to the outside of the reduction gear mechanism section 7, is provided at one side of the reduction gear mechanism section 7. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、車両に搭載される電装品等に設けられる減速機構付き電動モータの技術分野に関するものである。   The present invention relates to the technical field of an electric motor with a speed reduction mechanism provided in an electrical component or the like mounted on a vehicle.

一般に、車両に搭載されるワイパ装置、パワーウインドウ装置、パワーステアリング装置等の駆動源として電動モータを用いる場合では、電動モータの回転数が減速した状態で出力される減速機構付き電動モータを用いることがある。このような減速機構付き電動モータとしては、電動モータのモータ軸先端部に設けられたウォームギアと、該ウォームギアに噛合するウォームホイールとを、金属製のギアケースと、該ギアケースに突当て状に設けられる樹脂製のカバー体との間に収容した減速機構部を備えて構成されたものが提唱されている。そして、このものでは、ギアケースとカバー体との間に、電動モータの駆動制御をするための複数の素子であって、例えば、ＦＥＴ、コンデンサ等のパワー系の駆動素子と、ホールＩＣ、ＣＰＵ、メモリ等の制御素子とが適宜配線接続された制御基板を内装するとともに、該制御基板に接続するコネクタを減速機構部に設けたものが提唱されている。   In general, when an electric motor is used as a drive source for a wiper device, a power window device, a power steering device or the like mounted on a vehicle, an electric motor with a speed reduction mechanism that is output in a state where the rotation speed of the electric motor is decelerated is used. There is. As such an electric motor with a speed reduction mechanism, a worm gear provided at the tip of the motor shaft of the electric motor and a worm wheel meshing with the worm gear are made into a metal gear case, and abutting against the gear case. The thing comprised including the speed-reduction mechanism part accommodated between the resin-made cover bodies provided is proposed. And in this thing, it is a some element for carrying out drive control of an electric motor between a gear case and a cover body, Comprising: Power system drive elements, such as FET and a capacitor | condenser, Hall IC, CPU In addition, a control board in which a control element such as a memory is appropriately connected with a wiring is provided, and a connector connected to the control board is provided in a speed reduction mechanism.

特開２００４−１０４９６８号公報JP 2004-104968 A

しかしながら、前記従来のものにおいて、減速機構部に設けられるコネクタは電動モータのモータ軸の延出先端部に位置して設けられている一方、該モータ軸延出部に対向する部位の制御基板には、駆動素子としてのリレー、スイッチングトランジスタ等の駆動素子が設けられており、コネクタと駆動素子とがモータ軸延出部位において近付いた状態で配設されている。これに対し、コネクタには、外部電源の他に減速機構部の内外を接続するセンサ類の信号線が接続されており、このため、コネクタの信号線は、コネクタ近傍に配設された駆動素子のノイズによる影響を受けることがあり、このようになると、センサ類の精度を低下させる等の不具合が想定されて問題がある。さらに、このものにおいて、コネクタは減速機構部からモータ軸の延出方向に突出配設されているため、減速機構付き電動モータの軸方向の全長が長くなってしまい、コンパクト化が損なわれるという別の問題もあり、これらに本発明の解決すべき課題がある。   However, in the conventional device, the connector provided in the speed reduction mechanism portion is provided at the extension tip portion of the motor shaft of the electric motor, and on the control board in a portion facing the motor shaft extension portion. Are provided with driving elements such as relays and switching transistors as driving elements, and the connector and the driving element are arranged in a state where they are close to each other at the motor shaft extending portion. On the other hand, in addition to the external power supply, the connector is connected to signal lines of sensors that connect the inside and outside of the speed reduction mechanism. For this reason, the signal line of the connector is a drive element disposed in the vicinity of the connector. In this case, there is a problem that a problem such as a decrease in the accuracy of the sensors is assumed. Further, in this device, since the connector is provided so as to protrude from the speed reduction mechanism portion in the extending direction of the motor shaft, the total length in the axial direction of the electric motor with the speed reduction mechanism becomes long, and compactness is impaired. There are also problems to be solved by the present invention.

本発明は、上記の如き実情に鑑みこれらの課題を解決することを目的として創作されたものであって、請求項１の発明は、モータ部のモータ軸先端に設けられるウォームギアと、該ウォームギアに噛合するウォームホイールと、モータ部の駆動制御をするための複数の素子が配線された制御基板とを、ギアケースとカバー体との間に収容してなる減速機構部を備えた減速機構付き電動モータにおいて、前記制御基板を、ウォームギア配設部を基準としてウォームホイール配設部側となる一側方、および、他側方とに向けて延出形成し、制御基板に設けられる駆動用の素子を、制御基板の前記他側方に集中配設する一方、減速機構部の内外を接続するコネクタを減速機構部の前記一側方に設けたことを特徴とする減速機構付き電動モータである。
請求項２の発明において、減速機構部は、ウォームギア配設部の軸芯方向一方に、モータ部の先端部位を収容するモータ部先端配設部が形成され、該モータ部先端配設部と、ウォームギア配設部に対して直交状に設けられるウォームホイール配設部とによりＬ字状のコーナー部が形成されるものとし、コネクタは、前記コーナー部に設けられていること特徴とする請求項１に記載の減速機構付き電動モータである。 The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is directed to a worm gear provided at the tip of a motor shaft of a motor unit, and the worm gear. Electric motor with a speed reduction mechanism having a speed reduction mechanism portion in which a meshing worm wheel and a control board on which a plurality of elements for controlling drive of the motor portion are wired are housed between a gear case and a cover body In the motor, the control board is formed to extend toward one side which is the worm wheel arrangement part side and the other side with respect to the worm gear arrangement part, and a driving element provided on the control board Is provided on the one side of the speed reduction mechanism portion, while a connector for connecting the inside and outside of the speed reduction mechanism portion is provided on the other side of the control board.
In the invention of claim 2, the speed reduction mechanism portion is formed with a motor portion tip disposition portion that accommodates a tip portion of the motor portion on one side in the axial direction of the worm gear disposition portion, and the motor portion tip disposition portion; 2. An L-shaped corner portion is formed by a worm wheel disposition portion provided orthogonal to the worm gear disposition portion, and a connector is provided at the corner portion. The electric motor with a speed reduction mechanism described in 1.

請求項１の発明とすることにより、コネクタに駆動素子に基づくノイズが影響し難くなって、センサ類の精度が向上して信頼性の高い減速機構付き電動モータを提供できる。
請求項２の発明とすることにより、コネクタによりコンパクト化が損なわれるようなことがないようにできる。 According to the first aspect of the present invention, noise based on the drive element is less likely to be affected by the connector, and the accuracy of the sensors is improved and a highly reliable electric motor with a speed reduction mechanism can be provided.
By making it the invention of Claim 2, it can prevent that compactness is impaired by a connector.

減速機構付き電動モータの正面図である。It is a front view of an electric motor with a speed reduction mechanism. 図１のＸ−Ｘ断面図である。It is XX sectional drawing of FIG. 図３（Ａ）、（Ｂ）はそれぞれギアケースの側面図、背面図である。3A and 3B are a side view and a rear view of the gear case, respectively. 図４（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）はそれぞれカバー体の正面図、平面図、背面図、側面図である。4A, 4B, 4C, and 4D are a front view, a plan view, a rear view, and a side view of the cover body, respectively. 図５（Ａ）、（Ｂ）はそれぞれ減速機構部の正面図、側面図である。5A and 5B are a front view and a side view, respectively, of the speed reduction mechanism unit.

以下、本発明の実施の形態について、図面に基づいて説明する。
図面において、１は、ワイパ装置に設けられる減速機構付き電動モータであって、該減速機構付き電動モータ１を構成するモータ部２は、有底筒状のヨーク３にアーマチュア４が回転自在に収納されており、前記アーマチュア４を構成するアーマチュア軸（モータ軸）４ａの先端部には、コンミテータ５が一体的に外嵌されている。前記モータ軸４ａのコンミテータ５が外嵌する部位は、ヨーク３の開口端部３ａより先端側に延出しており、該コンミテータ５の先端側に延出するモータ軸４ａに、ウォームギア６がモータ軸４ａと一体回転する状態で設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes an electric motor with a speed reduction mechanism provided in a wiper device, and a motor portion 2 constituting the electric motor 1 with a speed reduction mechanism is housed in a bottomed cylindrical yoke 3 so that the armature 4 can rotate freely. A commutator 5 is integrally fitted on the tip of an armature shaft (motor shaft) 4a constituting the armature 4. The portion of the motor shaft 4a to which the commutator 5 is fitted extends from the open end 3a of the yoke 3 to the front end side. The worm gear 6 is connected to the motor shaft 4a extending to the front end side of the commutator 5. It is provided in a state of rotating integrally with 4a.

７は、前記ウォームギア６と、該ウォームギア６に噛合するウォームホイール８とを備えて構成される減速機構部であって、該減速機構部７は、図１を正面図としたとき、前方に位置し、ウォームギア６とウォームホイール８とを収容する金属製のギアケース９と、後方に位置し、ギアケース９に収容されたウォームギア６とウォームホイール８とを覆蓋するように設けられる樹脂製のカバー体１０とを備えて構成されている。
前記ギアケース９は、後方が開口する凹溝形状の収容部９ａと、基端側が開口し、モータ部２のヨーク開口端部３ａが突当て状に固定される筒状のヨーク突当て部９ｂとを備えて構成されている。
前記収容部９ａは、ウォームギア６が回転自在に収容される長尺状のギア軸収容室９ｃが形成されているとともに、該ギア軸収容室９ｃ（ウォームギア６の配設部）を基準として、該ウォームギア６の軸芯に対して直行する方向のうち、一側方（上方）に向けてホイール収容室９ｄが円弧形状に膨出する状態で形成されており、該ホイール収容室９ｄに、ウォームギア６に噛合するウォームホイール８が回転自在に収容されるように構成されている。さらに、ギア軸収容室９ｃ（ウォームギア６の配設部）の軸芯方向一方となる基端側（右方）には、モータ軸４ａのコンミテータ５外嵌部位と、該コンミテータ５に摺接するブラシ（図示せず）等の部材とが収容されるブラシ収容室（本発明のモータ部先端配設部に相当する）９ｅが形成されている。これによって、ギアケース収容部９ａは、ブラシ収容室９ｅとホイール収容室９ｄとによりＬ字状のコーナー部が形成され、正面視Ｌ字形状となっている。
さらに、ギアケース９には、ギア軸収容室９ｃの他側方（下方）であって、前記ホイール収容室９ｄ配設側とは反対側となる部位には素子収容室９ｆが形成されているが、該素子収容室９ｆは、ギア軸収容室９ｃ、ホイール収容室９ｄ、ブラシ収容室９ｅの各凹溝部より浅溝状に形成されている。 Reference numeral 7 denotes a speed reduction mechanism portion that includes the worm gear 6 and a worm wheel 8 that meshes with the worm gear 6. The speed reduction mechanism portion 7 is positioned forward when FIG. 1 is a front view. A metal gear case 9 that accommodates the worm gear 6 and the worm wheel 8, and a resin cover that is located behind and is provided so as to cover the worm gear 6 and the worm wheel 8 accommodated in the gear case 9. A body 10 is provided.
The gear case 9 has a concave groove-shaped housing portion 9a that opens at the rear, and a cylindrical yoke abutting portion 9b that opens at the base end side and is fixed to the yoke opening end portion 3a of the motor portion 2 in a butting shape. And is configured.
The accommodating portion 9a is formed with a long gear shaft accommodating chamber 9c in which the worm gear 6 is rotatably accommodated, and the gear shaft accommodating chamber 9c (arrangement portion of the worm gear 6) is used as a reference. Of the directions orthogonal to the axis of the worm gear 6, the wheel housing chamber 9 d is formed in a state of bulging in an arc shape toward one side (upward), and the worm gear 6 is formed in the wheel housing chamber 9 d. The worm wheel 8 that meshes with each other is rotatably accommodated. Further, on the base end side (right side) that is one axial direction of the gear shaft accommodating chamber 9c (arrangement portion of the worm gear 6), the outer fitting portion of the commutator 5 of the motor shaft 4a and the brush that is in sliding contact with the commutator 5 are provided. A brush accommodating chamber 9e (corresponding to the motor portion tip disposing portion of the present invention) 9e for accommodating a member such as (not shown) is formed. Thus, the gear case housing portion 9a has an L-shaped corner portion formed by the brush housing chamber 9e and the wheel housing chamber 9d, and has an L shape when viewed from the front.
Further, the gear case 9 is formed with an element housing chamber 9f on the other side (lower side) of the gear shaft housing chamber 9c and on the opposite side of the wheel housing chamber 9d. However, the element accommodating chamber 9f is formed in a shallow groove shape from the respective concave groove portions of the gear shaft accommodating chamber 9c, the wheel accommodating chamber 9d, and the brush accommodating chamber 9e.

そして、収容部９ａの基端側に突出するブラシ収容室９ｅの基端側に、前記ヨーク突当て部９ｂが一体形成されているが、該ヨーク突当て部９ｂはギア軸収容室９ｄと同芯状の筒状体に形成されており、ヨーク開口端３ａと同形状となっている。ここで、前記ヨーク突当て部９ｂは、前端位置は収容部９ａにおける前端位置と略同位置となるが、ヨーク突当て部９ｂの後端位置は、図３（Ａ）に示すように、収容部９ａの後端位置となる後部開口端縁９ｇより後方に突出するように形成されている。
尚、９ｈは、ホイール収容室９ｄの前面から前方に突出形成された軸支持孔であって、該軸支持孔９ｈは、ウォームホイール８の前方に突出する出力軸８ａを回転自在に軸承しており、該出力軸８ａの軸支持孔９ｈから前方に突出する突出端部が動力取り出し部に構成されている。 The yoke abutting portion 9b is integrally formed on the base end side of the brush accommodating chamber 9e protruding to the proximal end side of the accommodating portion 9a. The yoke abutting portion 9b is the same as the gear shaft accommodating chamber 9d. It is formed in a core-like cylindrical body and has the same shape as the yoke opening end 3a. Here, the front end position of the yoke abutting portion 9b is substantially the same as the front end position of the accommodating portion 9a, but the rear end position of the yoke abutting portion 9b is accommodated as shown in FIG. It is formed so as to protrude rearward from the rear opening edge 9g serving as the rear end position of the portion 9a.
Reference numeral 9h denotes a shaft support hole that protrudes forward from the front surface of the wheel housing chamber 9d. The shaft support hole 9h rotatably supports the output shaft 8a that protrudes forward of the worm wheel 8. A projecting end projecting forward from the shaft support hole 9h of the output shaft 8a is configured as a power take-out portion.

前記カバー体１０は、ギアケース９の正面視Ｌ字形状の収容部９ａを覆蓋する覆蓋部１０ａと、後述するコネクタ１０ｂとを備えて構成されている。
前記覆蓋部１０ａは、前方が開口する凹溝形状に形成されており、ギアケース９のギア軸収容室９ｃ、ホイール収容室９ｄ、素子収容室９ｆを覆蓋するとともに、後述する制御基板１１が収用される基板収容室１０ｃと、ブラシ収容室９ｅ（モータ部先端配設部）を覆蓋するとともに、ブラシや制御基板１１に外部電源を接続するための端子プレート１０ｄが植設される端子収容室１０ｅとが仕切り片１０ｆを介して形成されており、ギアケース収容部９ａと同様に正面視略Ｌ字形状に形成されている。そして、基板収容室１０ｃのウォームホイール８に対向する部位と端子収容室１０ｅとによりＬ字状のコーナー部が形成され、該コーナー部にコネクタ１０ｂが一体形成されている。 The cover body 10 includes a cover portion 10a that covers the L-shaped housing portion 9a of the gear case 9 and a connector 10b described later.
The cover portion 10a is formed in the shape of a concave groove that opens to the front, covers the gear shaft housing chamber 9c, the wheel housing chamber 9d, and the element housing chamber 9f of the gear case 9, and a control board 11 described later is adopted. The terminal housing chamber 10c and the brush housing chamber 9e (motor unit tip placement portion) are covered and a terminal housing chamber 10e in which a terminal plate 10d for connecting an external power source to the brush and the control board 11 is implanted. Is formed through a partition piece 10f, and is formed in a substantially L shape in a front view like the gear case housing portion 9a. An L-shaped corner portion is formed by the portion of the substrate storage chamber 10c facing the worm wheel 8 and the terminal storage chamber 10e, and the connector 10b is integrally formed at the corner portion.

前記コネクタ１０ｂは、覆蓋部１０ａのウォームホイール８に対向する部位の基端側の側壁から基端側に向けて突出形成されており、コネクタ１０ｂの基端側端縁位置は、端子収容室１０ｅの基端側端端縁位置と同位置となるように形成されているとともに、コネクタ１０の上端側端縁位置は、基板収容室１０ｃ（ウォームホイール８の対向部位）の上端位置（円弧形状の膨出端部）を越えて突出することがないように形成されている。さらに、コネクタ１０ｂの前後端位置は覆蓋部１０ａの前後端位置を越えて突出することがないように形成されており、これによって、コネクタ１０ｂがカバー体１０のコンパクト化を損なうことがないように構成されている。
そして、コネクタ１０ｂには、前記端子収容室１０ｅの端子プレート１０ｄに接続される電源ターミナル１０ｇ、基板収容室１０ｅの制御基板１１に接続される信号ターミナル１０ｈとが設けられており、図示しない外部コネクタが基端側から挿し込まれて抜止め状に連結することにより、外部電源を電源ターミナル１０ｇを介して端子プレート１０ｄに接続し、センサ類の信号線を信号ターミナル１０ｈを介して制御基板１１に接続するように構成されている。 The connector 10b is formed to project from the side wall on the base end side of the portion facing the worm wheel 8 of the cover portion 10a toward the base end side, and the base end side edge position of the connector 10b is in the terminal accommodating chamber 10e. And the upper end side edge position of the connector 10 is the upper end position of the substrate housing chamber 10c (opposite part of the worm wheel 8) (arc-shaped). It is formed so as not to protrude beyond the bulging end). Further, the front and rear end positions of the connector 10b are formed so as not to protrude beyond the front and rear end positions of the cover portion 10a, so that the connector 10b does not impair the compactness of the cover body 10. It is configured.
The connector 10b is provided with a power terminal 10g connected to the terminal plate 10d of the terminal accommodating chamber 10e and a signal terminal 10h connected to the control board 11 of the substrate accommodating chamber 10e. Is inserted from the base end side and connected in a retaining shape, thereby connecting an external power source to the terminal plate 10d via the power terminal 10g, and connecting the sensor signal lines to the control board 11 via the signal terminal 10h. Configured to connect.

さらに、カバー覆蓋部１０ａの前部開口端縁１０ｉには後方に退避する凹溝部１０ｊが形成されており、該凹溝部１０ｊに、ギアケース９の後部開口端縁９ｇをシール材を介して内嵌させることにより、ギアケース収容部９ａとカバー体覆蓋部１０ａとが封止状に突当てられ、ギアケース収容部９ａの外周とカバー体覆蓋部１０ａの外周とに互いに対向するように形成された螺子止め片９ｉ、１０ｋ同士を螺着することでカバー体１０のギアケース９への一体化がなされるように構成されている。
前記ギアケース９とカバー体１０との組込み状態において、ギアケース９のヨーク突当て部９ｂの後端位置は、カバー体１０の後端位置と略同様になるように設定されており、カバー体１０のコネクタ１０ｂが、ギアケース９のヨーク突当て部９ｂの後端位置より後方に突出することがないように構成されている。これによって、コネクタ１０ｂが減速機構部７（減速機構付き電動モータ１）のコンパクト化を損なうことがないように構成されている。 Further, a concave groove portion 10j that retreats backward is formed in the front opening edge 10i of the cover cover portion 10a, and the rear opening edge 9g of the gear case 9 is inserted into the concave groove portion 10j via a sealing material. By fitting, the gear case housing portion 9a and the cover body cover portion 10a are abutted in a sealed manner, and are formed so as to face each other on the outer periphery of the gear case housing portion 9a and the outer periphery of the cover body cover portion 10a. Further, the cover body 10 is configured to be integrated with the gear case 9 by screwing the screw fastening pieces 9i and 10k together.
In the assembled state of the gear case 9 and the cover body 10, the rear end position of the yoke abutting portion 9 b of the gear case 9 is set to be substantially the same as the rear end position of the cover body 10. The ten connectors 10b do not protrude rearward from the rear end position of the yoke abutting portion 9b of the gear case 9. Thus, the connector 10b is configured so as not to impair the downsizing of the speed reduction mechanism portion 7 (the electric motor 1 with the speed reduction mechanism).

一方、前記カバー体覆蓋部１０ａの基板収容室１０ｃに配される制御基板１１は、カバー体１０の前部開口端縁１０ｊ部位であるギアケース９とカバー体１０との突当て部に位置して支持されている。前記制御基板１１の形状は、ウォームギア６配設部（ギアケース９のギア軸収容室９ｄ）を基準として一側方となるウォームホイール８配設側（ギアケース９のホイール収容室９ｄ）と、他側方となるギアケース９の素子収容室９ｆ側に向けて延出形成されている。前記制御基板１１は、後面となるカバー体１０側の面に、モータ部２の駆動制御をするための複数の素子である、例えば、ＦＥＴ、コンデンサ等のパワー系の駆動用の素子である駆動素子１１ａと、ホールＩＣ、ＣＰＵ、メモリ等の制御用の素子である制御素子１１ｂとが適宜配線接続されている。そして、本実施の形態では、制御素子類１１ｂは、ウォームギア６対向部を基準として制御基板１１の一側方であるウォームホイール８対向部位に一纏めになって配線されており、駆動素子１１ａ類は、制御基板１１の他側方であるギアケース９の素子収容室９ｆ対向部位に一纏めになって集中的に配設されており、駆動素子１１ａと制御素子１１ｂとがウォームギア６対向部位を基準として両側方に分かれて配設されている。   On the other hand, the control substrate 11 disposed in the substrate housing chamber 10c of the cover body cover portion 10a is located at the abutting portion between the gear case 9 and the cover body 10 which is the front opening edge 10j portion of the cover body 10. It is supported. The shape of the control board 11 is such that the worm wheel 6 disposition side (the wheel housing chamber 9d of the gear case 9) is one side with respect to the worm gear 6 disposition portion (the gear shaft housing chamber 9d of the gear case 9). The gear case 9 on the other side is formed to extend toward the element housing chamber 9f. The control board 11 has a plurality of elements for controlling the driving of the motor unit 2 on the surface on the cover body 10 side as a rear surface, for example, a drive that is a power system driving element such as an FET or a capacitor. The element 11a and the control element 11b, which is a control element such as a Hall IC, CPU, and memory, are appropriately connected by wiring. In the present embodiment, the control elements 11b are wired together in a portion facing the worm wheel 8 on one side of the control board 11 with the worm gear 6 facing portion as a reference, and the drive elements 11a are The gear case 9 that is on the other side of the control board 11 is centrally arranged on the element housing chamber 9f facing portion, and the drive element 11a and the control element 11b are based on the worm gear 6 facing portion. It is arranged separately on both sides.

このように、駆動素子１１ａはウォームギア６を基準としてた他側方に集中的に配設されていて、一側方に配設される制御素子１１ｂとは所定間隔を存するように構成されている。これによって、駆動素子１１ａのノイズや発熱が制御素子１１ｂに影響を及ぼすようなことを低減できるように構成されている。
また、駆動素子１１ａは制御基板１１の他側方に設けられていて、カバー体１０の一側方に設けられるコネクタ１０ｂに対して離間するように構成されている。これによって、駆動素子１１ａのノイズがコネクタ１０ｂの信号線に影響を及ぼすようなことを低減できて、センサ類の精度低下を防止できるように構成されている。
しかも、前記駆動素子１１ａ類は、一纏めとなって金属材で形成されるギアケース９の素子収容室９ｆ部位に対向して配設されているが、前記素子収容室９ｆは、溝浅状に形成されていて駆動素子１１ａに近接する状態となっているとともに、素子収容室９ｆの前面には複数のフィン９ｊが前方に向けて突出形成されている。これによって、駆動素子１１ａからの発熱がフィン９ｊを介して外部に放熱することができて、前記発熱による温度上昇自体を抑制できるように構成されている。 In this manner, the drive element 11a is concentrated on the other side with respect to the worm gear 6, and is configured to have a predetermined distance from the control element 11b disposed on one side. . Thus, the noise and heat generation of the drive element 11a can be reduced from affecting the control element 11b.
The drive element 11a is provided on the other side of the control board 11, and is configured to be separated from the connector 10b provided on one side of the cover body 10. Thereby, it is possible to reduce the influence of the noise of the drive element 11a on the signal line of the connector 10b, and to prevent the accuracy of the sensors from being lowered.
In addition, the drive elements 11a are collectively disposed so as to face the element accommodating chamber 9f portion of the gear case 9 formed of a metal material, but the element accommodating chamber 9f has a shallow groove shape. It is formed and is in a state of being close to the drive element 11a, and a plurality of fins 9j are formed to protrude forward on the front surface of the element storage chamber 9f. Thus, the heat generated from the drive element 11a can be radiated to the outside through the fins 9j, and the temperature rise due to the heat generation can be suppressed.

叙述の如く構成された本形態において、減速機構付き電動モータ１の減速機構部７は、ギアケース９とカバー体１０との間に、ウォームギア６とウォームホイール８、さらには、モータ部２を駆動制御するための駆動素子１１ａ、制御素子１１ｂが設けられた制御基板１１が収容されることになるが、前記制御基板１１は、ウォームギア６配設部を基準として、ウォームホイール８配設部側となる一方側に制御素子１１ｂが一纏めとなって集中配設され、ギアケース９の駆動素子収容室９ｆ対向部となる他方側に駆動素子１１ａ一纏めとなって設けられ、駆動素子１１ａと制御素子１１ｂとがウォームギア６対向部位を基準として両側方に分かれて配設されている。この結果、ノイズの影響を受けやすい制御素子１１ａがノイズ発生源である駆動素子１１ａに対して離れて設けられることになって、制御素子１１ａに対するノイズの影響を低減できる。また、減速機構部７の内外を接続するコネクタ１０ｂは、カバー体１０のウォームホイール８配設部側である一方側に位置して設けられているので、制御基板１１の他方側に集中配設される駆動素子１１ａにより発生するノイズがコネクタ１０ｂの信号線に及ぼす影響を低減できて、センサ類の精度低下が防止され、信頼性の高い減速機構付き電動モータ１を提供することができる。   In the present embodiment configured as described, the speed reduction mechanism portion 7 of the electric motor 1 with a speed reduction mechanism drives the worm gear 6 and the worm wheel 8 and further the motor portion 2 between the gear case 9 and the cover body 10. A control board 11 provided with a drive element 11a and a control element 11b for control is housed. The control board 11 is arranged on the worm wheel 8 arrangement part side with respect to the worm gear 6 arrangement part. The control elements 11b are collectively arranged on one side, and the drive elements 11a are collectively arranged on the other side of the gear case 9 opposite to the drive element accommodating chamber 9f, and the drive elements 11a and 11b are arranged. Are arranged separately on both sides with respect to the worm gear 6 facing part. As a result, the control element 11a that is easily affected by noise is provided away from the drive element 11a that is a noise generation source, and the influence of noise on the control element 11a can be reduced. Further, the connector 10b for connecting the inside and outside of the speed reduction mechanism portion 7 is provided on one side of the cover body 10 on the worm wheel 8 placement portion side, so that it is concentrated on the other side of the control board 11. Thus, it is possible to reduce the influence of noise generated by the drive element 11a on the signal line of the connector 10b, to prevent the accuracy of sensors from being lowered, and to provide a highly reliable electric motor 1 with a speed reduction mechanism.

このように、本発明が実施されたものにあっては、制御基板１１に設けられる駆動素子１１ａを、ウォームギア６の配設部を基準として他側方に集中して配設する一方、制御基板１１に接続するコネクタ１０ｂを、減速機構部７の一方側に位置させて、コネクタ１０ｂの信号線に駆動素子１１ａのノイズの影響が低減されるようにしたものであるが、減速機構部７を構成するギアケース９とカバー体１０とは、ウォームホイール８の配設部とモータ部２の先端配設部とによりＬ字状のコーナー部が形成され、該コーナー部にコネクタ１０ｂが設けられていてコネクタ１０ｂが減速機構部７の外形状から突出することがなく、コネクタ１０ｂが減速機構付き電動モータ１のコンパクト化を損なうような不具合を防止することができる。   As described above, in the embodiment in which the present invention is implemented, the drive element 11a provided on the control board 11 is concentrated on the other side with respect to the arrangement part of the worm gear 6, while the control board 11 11, the connector 10 b connected to 11 is positioned on one side of the speed reduction mechanism portion 7 so that the influence of noise of the drive element 11 a on the signal line of the connector 10 b is reduced. The gear case 9 and the cover body 10 that are formed have an L-shaped corner portion formed by the placement portion of the worm wheel 8 and the tip placement portion of the motor portion 2, and a connector 10b is provided at the corner portion. Thus, the connector 10b does not protrude from the outer shape of the speed reduction mechanism section 7, and the problem that the connector 10b impairs the compactness of the electric motor 1 with the speed reduction mechanism can be prevented.

本発明は、ワイパ装置、パワーウインドウ装置、パワーステアリング装置のように、減速機構部が設けられた電動モータが用いられる装置に利用することができる。   The present invention can be used for a device using an electric motor provided with a speed reduction mechanism, such as a wiper device, a power window device, and a power steering device.

１ 減速機構付き電動モータ
２ モータ部
６ ウォームギア
７ 減速機構部
８ ウォームホイール
９ ギアケース
９ａ 収容部
９ｂ ヨーク突当て部
９ｃ ギア軸収容室
９ｄ ホイール収容室
９ｆ 素子収容室
１０ カバー体
１０ａ 覆蓋部
１０ｂ コネクタ
１０ｃ 基板収容室
１１ 制御基板
１１ａ 駆動素子
１１ｂ 制御素子 DESCRIPTION OF SYMBOLS 1 Electric motor with reduction mechanism 2 Motor part 6 Worm gear 7 Deceleration mechanism part 8 Worm wheel 9 Gear case 9a Accommodating part 9b Yoke contact part 9c Gear shaft accommodating chamber 9d Wheel accommodating chamber 9f Element accommodating chamber 10 Cover body 10a Covering part 10b Connector 10c Substrate storage chamber 11 Control substrate 11a Drive element 11b Control element

Claims (2)

モータ部のモータ軸先端に設けられるウォームギアと、該ウォームギアに噛合するウォームホイールと、モータ部の駆動制御をするための複数の素子が配線された制御基板とを、ギアケースとカバー体との間に収容してなる減速機構部を備えた減速機構付き電動モータにおいて、前記制御基板を、ウォームギア配設部を基準としてウォームホイール配設部側となる一側方、および、他側方とに向けて延出形成し、制御基板に設けられる駆動用の素子を、制御基板の前記他側方に集中配設する一方、減速機構部の内外を接続するコネクタを減速機構部の前記一側方に設けたことを特徴とする減速機構付き電動モータ。 A worm gear provided at the tip of the motor shaft of the motor unit, a worm wheel meshing with the worm gear, and a control board on which a plurality of elements for controlling the drive of the motor unit are wired between the gear case and the cover body In the electric motor with a speed reduction mechanism having a speed reduction mechanism housed in the housing, the control board is directed to one side which is the worm wheel arrangement portion side and the other side with respect to the worm gear arrangement portion. The driving elements provided on the control board are concentratedly arranged on the other side of the control board, and the connector for connecting the inside and outside of the speed reduction mechanism is provided on the one side of the speed reduction mechanism. An electric motor with a speed reduction mechanism characterized by being provided. 減速機構部は、ウォームギア配設部の軸芯方向一方に、モータ部の先端部位を収容するモータ部先端配設部が形成され、該モータ部先端配設部と、ウォームギア配設部に対して直交状に設けられるウォームホイール配設部とによりＬ字状のコーナー部が形成されるものとし、コネクタは、前記コーナー部に設けられていること特徴とする請求項１に記載の減速機構付き電動モータ。 The speed reduction mechanism portion is formed with a motor portion tip disposition portion that accommodates the tip portion of the motor portion on one side in the axial direction of the worm gear disposition portion, with respect to the motor portion tip disposition portion and the worm gear disposition portion. 2. The electric motor with a speed reduction mechanism according to claim 1, wherein an L-shaped corner portion is formed by a worm wheel arrangement portion provided in an orthogonal shape, and the connector is provided in the corner portion. motor.
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JP2016000555A (en) * 2014-06-11 2016-01-07 アスモ株式会社 Wiper motor
JP2016002787A (en) * 2014-06-13 2016-01-12 アスモ株式会社 Wiper motor
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US10320265B2 (en) 2009-07-30 2019-06-11 Mitsuba Corporation Wiper motor
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US9979261B2 (en) 2009-07-30 2018-05-22 Mitsuba Corporation Motor with speed reduction mechanism
US10348164B2 (en) 2009-07-30 2019-07-09 Mitsuba Corporation Motor with speed reduction mechanism
US10320265B2 (en) 2009-07-30 2019-06-11 Mitsuba Corporation Wiper motor
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US10071710B2 (en) 2013-12-25 2018-09-11 Mitsuba Corporation Wiper apparatus
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US10594233B2 (en) 2013-12-25 2020-03-17 Mitsuba Corporation Brushless motor, wiper apparatus, motor apparatus and control method for motor apparatus
JP2016000555A (en) * 2014-06-11 2016-01-07 アスモ株式会社 Wiper motor
JP2016002787A (en) * 2014-06-13 2016-01-12 アスモ株式会社 Wiper motor
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JP2016037212A (en) * 2014-08-08 2016-03-22 アスモ株式会社 Vehicular wiper motor

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