JP4716901B2 - Geared motor - Google Patents

Geared motor Download PDF

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JP4716901B2
JP4716901B2 JP2006057252A JP2006057252A JP4716901B2 JP 4716901 B2 JP4716901 B2 JP 4716901B2 JP 2006057252 A JP2006057252 A JP 2006057252A JP 2006057252 A JP2006057252 A JP 2006057252A JP 4716901 B2 JP4716901 B2 JP 4716901B2
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magnet
geared motor
transmission gear
final transmission
notch
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JP2007232664A (en
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清之 新井
一彦 熊井戸
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Nidec Copal Electronics Corp
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Description

本発明は位置検出装置を取付けたギアードモータに関する。   The present invention relates to a geared motor equipped with a position detection device.

従来のギアードモータの位置検出には磁気センサを使用している。
このため、アキシャル方向に着磁された２極磁石のＳ極磁界（またはＮ極磁界）の強弱に対して、ＯＮ、ＯＦＦの動作を行なうセンシング方法ではマグネットと磁気センサの距離変動による検出信号への影響が大きく、精度のよいセンシングは困難であるという欠点があった。
特になし A magnetic sensor is used to detect the position of a conventional geared motor.
For this reason, in the sensing method in which the ON / OFF operation is performed with respect to the strength of the S-pole magnetic field (or N-pole magnetic field) of the dipole magnet magnetized in the axial direction, the detection signal is caused by the fluctuation in the distance between the magnet and the magnetic sensor. There is a drawback that accurate sensing is difficult.
nothing special

本発明は以上のような従来の欠点に鑑み、マグネットと磁気センサとの距離変動による検出信号への影響を受け難く、正確に検出することができるとともに、モータの基準励磁相とセンサ信号のＡＮＤにより、原点位置出し制御が容易で、従来のギアードモータの外形寸法と同じにすることができるギアードモータを提供することを目的としている。 In view of the conventional drawbacks as described above, the present invention is less susceptible to the detection signal due to the variation in the distance between the magnet and the magnetic sensor, can be detected accurately, and the reference excitation phase of the motor and the AND of the sensor signal. Accordingly, it is an object of the present invention to provide a geared motor that can be easily controlled in the origin position and can have the same outer dimensions as a conventional geared motor.

本発明の前記ならびにそのほかの目的と新規な特徴は次の説明を添付図面と照らし合わせて読むと、より完全に明らかになるであろう。
ただし、図面はもっぱら解説のためのものであって、本発明の技術的範囲を限定するものではない。 The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

上記目的を達成するために、本発明はギアードモータ本体と、このギアードモータ本体のギアーボックスより外方へ突出する出力軸と、この出力軸の前記ギアーボックス内に位置する部位に固定された磁性体で形成された最終の変速歯車と、この最終の変速歯車の側面に吸着状態で取付けることができる、外周部の一部に切り欠部が形成されたマグネットと、このマグネットの切り欠部に入って、該マグネットの位置決めをするとともに、該切り欠部の端部に急峻な磁束線が生じるように、前記最終の変速歯車に一体形成されたセンサ片と、前記マグネットを覆い、前記出力軸が外方へ突出するように前記ギアーボックスに取付けられた、前記マグネットの切り欠部の端部に生じる急峻な磁束線を検出する磁気センサとでギアードモータを構成している。 To achieve the above object, the present invention provides a geared motor main body, an output shaft projecting outward from the gear box of the geared motor main body, and a magnetic member fixed to a portion of the output shaft located in the gear box. A final transmission gear formed of a body, a magnet that can be attached to the side surface of the final transmission gear in an attracted state, and a notch formed in a part of the outer peripheral portion; And the magnet is positioned so as to position the magnet and a steep magnetic flux line is generated at the end of the notch. The geared motor is composed of a magnetic sensor that is attached to the gear box so as to protrude outward and detects a steep magnetic flux line generated at the end of the notch of the magnet. It is.

以上の説明から明らかなように、本発明にあっては次に列挙する効果が得られる。   As is clear from the above description, the present invention has the following effects.

（１）ギアードモータ本体と、このギアードモータ本体のギアーボックスより外方へ突出する出力軸と、この出力軸の前記ギアーボックス内に位置する部位に固定された磁性体で形成された最終の変速歯車と、この最終の変速歯車の側面に吸着状態で取付けることができる、外周部の一部に切り欠部が形成されたマグネットと、このマグネットの切り欠部に入って、該マグネットの位置決めをするとともに、該切り欠部の端部に急峻な磁束線が生じるように、前記最終の変速歯車に一体形成されたセンサ片と、前記マグネットを覆い、前記出力軸が外方へ突出するように前記ギアーボックスに取付けられた、前記マグネットの切り欠部の端部に生じる急峻な磁束線を検出する磁気センサとで構成されているので、マグネットと磁気センサとの距離変動が生じても、急峻な磁束線を磁気センサで検出するため、正確に検出することができる。 (1) A final shift formed of a geared motor main body, an output shaft projecting outward from the gear box of the geared motor main body, and a magnetic body fixed to a portion of the output shaft located in the gear box. A gear, a magnet that can be attached to the side surface of this final transmission gear in an attracted state, and a magnet that has a notch formed in a part of the outer periphery, and the magnet is positioned to enter the notch. In addition, a sensor piece integrally formed with the final transmission gear and the magnet are covered so that a steep magnetic flux line is generated at the end of the notch so that the output shaft protrudes outward. It is composed of a magnetic sensor that is attached to the gear box and detects steep magnetic flux lines generated at the end of the notch of the magnet. Even away fluctuation occurs, a steep magnetic flux lines for detecting the magnetic sensor can be detected accurately.

（２）前記（１）によって、モータに内蔵されている歯車の位置を基準励磁相に合わせて組み込むことにより、モータの基準励磁相とセンサ信号のＡＮＤにより原点位置出し制御が容易にできる。 (2) By incorporating the position of the gear incorporated in the motor in accordance with the reference excitation phase according to the above (1), the origin position control can be easily performed by the AND of the reference excitation phase of the motor and the sensor signal.

（３）前記（１）により、磁気センサをギアーボックス内に取付けることにより、従来のギアードモータと同様な外形寸法にすることができる。 (3) According to the above (1), the external dimensions similar to those of the conventional geared motor can be obtained by mounting the magnetic sensor in the gear box.

（４）前記（１）により、最終の変速歯車とマグネットとの組み付けが、最終の変速歯車のセンサ片とマグネットの切り欠部との嵌合でよいので、容易にかつ正確な位置合わせ状態で行なうことができる。 (4) According to the above (1), since the final transmission gear and the magnet can be assembled with the sensor piece of the final transmission gear and the notch portion of the magnet, it can be easily and accurately aligned. Can be done.

（５）請求項２も前記（１） 〜（４）と同様な効果が得られる。 (5) In claim 2, the same effects as in the above (1) to (4) can be obtained.

以下、図面に示す本発明を実施するための最良の形態により、本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the invention shown in the drawings.

図１ないし図８に示す本発明を実施するための最良の第１の形態において、１は位置検出を行なうことができる本発明のギアードモータで、このギアードモータ１はギアードモータ本体２と、このギアードモータ本体２の駆動軸３が突出する部位を覆うように、該ギアードモータ本体２のケース４に取付けられたギアーボックス５と、このギアーボックス５内に位置する駆動軸３とは異なる偏心位置に配置された、該ギアーボックス５より外方へ突出する部位６ａおよび最終の変速歯車取付部位６ｂがＤ字状に形成された出力軸６と、前記ギアーボックス５内に位置する前記出力軸６の最終の変速歯車取付部位に位置決め状態で取付けられる磁性体で形成され、先端部側の軸孔が円形状で、後端部側がＤ字状で、直線部に爪片７ａが形成された最終の変速歯車７と、この最終の変速歯車７の外側面の外周部寄りの部位に外方へ突出するように一体形成された扇状のセンサ片８と、前記最終の変速歯車７の外側面と吸着状態で、前記出力軸６に取付けられる外周部に前記センサ片８が嵌合する切り欠部９が形成されたマグネット１０と、前記ギアーボックス５の外側面に取付けられた基盤１１と、この基盤１１の前記センサ片８部位で生じる急峻な磁束波形１２を検出できる部位に取付けられたホールＩＣ等の磁気センサ１３と、前記駆動軸３の駆動を前記出力軸６の最終の変速歯車７に伝達する複数個の変速歯車１４、１４Ａ、１４Ｂ、１４Ｃ、１４Ｄとで構成されている。   In the first preferred embodiment for carrying out the present invention shown in FIGS. 1 to 8, reference numeral 1 denotes a geared motor according to the present invention capable of performing position detection. This geared motor 1 includes a geared motor main body 2, A gear box 5 attached to the case 4 of the geared motor main body 2 so as to cover a portion where the drive shaft 3 of the geared motor main body 2 protrudes, and an eccentric position different from the drive shaft 3 located in the gear box 5 And an output shaft 6 in which a portion 6a projecting outward from the gear box 5 and a final transmission gear mounting portion 6b are formed in a D-shape, and the output shaft 6 located in the gear box 5 Is formed with a magnetic body that is attached to the final transmission gear attachment portion in a positioning state, the tip end side shaft hole is circular, the rear end portion side is D-shaped, and the claw piece 7a is formed in the linear portion. The final transmission gear 7, a fan-shaped sensor piece 8 integrally formed so as to protrude outward at a portion near the outer peripheral portion of the outer surface of the final transmission gear 7, and the outer surface of the final transmission gear 7 And a magnet 10 having a cutout portion 9 into which the sensor piece 8 is fitted on the outer peripheral portion attached to the output shaft 6 in an attracted state, and a base 11 attached to the outer surface of the gear box 5; A magnetic sensor 13 such as a Hall IC attached to a portion where the steep magnetic flux waveform 12 generated at the sensor piece 8 portion of the base 11 can be detected, and the drive shaft 3 to drive the final transmission gear 7 of the output shaft 6. The transmission gears 14, 14 </ b> A, 14 </ b> B, 14 </ b> C, and 14 </ b> D are transmitted to the transmission.

上記構成のギアードモータ１は複数個の変速歯車１４、１４Ａ、１４Ｂ、１４Ｃ、１４Ｄおよび最終の変速歯車７の位置を基準励磁相に合わせて組み込むことにより、基準励磁相とセンサ信号のＡＮＤによる出力軸６の原点位置出し制御が可能となる。
このように組み立てられたギアードモータ１はギアードモータ本体２の駆動軸３の回転が複数個の変速歯車１４、１４Ａ、１４Ｂ、１４Ｃ、１４Ｄ、７を介して出力軸６に伝わって回転する。
この出力軸６が回転する最終の変速歯車７の回転によりマグネット１０も一体的に回転し、マグネット１０の切り欠部９に挿入されている最終の変速歯車７と一体成形されたセンサ片８間に生じる急峻な磁束波形１２部分がホールＩＣを用いた磁気センサ１３が位置する部位を通過することにより、センサ片８と磁気センサ１３との間の寸法誤差が生じても、出力軸６の位置を確実に検出することができる。
[発明を実施するための異なる形態] The geared motor 1 having the above configuration incorporates the positions of the plurality of transmission gears 14, 14 </ b> A, 14 </ b> B, 14 </ b> C, 14 </ b> D and the final transmission gear 7 in accordance with the reference excitation phase, thereby outputting the reference excitation phase and the sensor signal by AND. The origin position control of the shaft 6 can be performed.
The geared motor 1 assembled in this way is rotated by the rotation of the drive shaft 3 of the geared motor main body 2 being transmitted to the output shaft 6 via the plurality of transmission gears 14, 14 A, 14 B, 14 C, 14 D, 7.
The magnet 10 also rotates integrally with the rotation of the final transmission gear 7 that rotates the output shaft 6, and the sensor piece 8 that is integrally formed with the final transmission gear 7 that is inserted into the notch 9 of the magnet 10. Even if a dimensional error between the sensor piece 8 and the magnetic sensor 13 occurs due to the steep magnetic flux waveform 12 portion generated in FIG. 12 passing through the position where the magnetic sensor 13 using the Hall IC is located, the position of the output shaft 6 Can be reliably detected.
[Different forms for carrying out the invention]

次に、図９ないし図１４に示す本発明を実施するための異なる形態につき説明する。なお、これらの本発明を実施するための異なる形態の説明に当って、前記本発明を実施するための最良の第１の形態と同一構成部分には同一符号を付して重複する説明を省略する。   Next, different modes for carrying out the present invention shown in FIGS. 9 to 14 will be described. In the description of these different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are designated by the same reference numerals and redundant description is omitted. To do.

図９ないし図１１に示す本発明を実施するための第２の形態において、前記本発明を実施するための最良の第１の形態と主に異なる点は、最終の変速歯車７Ａに台形状のセンサ片８Ａを一体成形するとともに、該センサ片８Ａが嵌合される切り欠部９Ａを形成したマグネット１０Ａを用いた点で、このように構成したマグネット１０Ａと最終の変速歯車７Ａとを用いて構成したギアードモータ１Ａにしても、前記本発明を実施するための最良の第１の形態と同様な作用効果が得られる。   The second embodiment for carrying out the present invention shown in FIGS. 9 to 11 is mainly different from the best first embodiment for carrying out the present invention in that the final transmission gear 7A has a trapezoidal shape. The sensor piece 8A is integrally formed, and the magnet 10A having the cutout portion 9A into which the sensor piece 8A is fitted is used. The magnet 10A thus configured and the final transmission gear 7A are used. Even with the structured geared motor 1A, the same effects as those of the best first embodiment for carrying out the present invention can be obtained.

図１２ないし図１４に示す本発明を実施するための第３の形態において、前記本発明を実施するための最良の第１の形態と主に異なる点は、磁気センサ１３が取付けられた基盤１１をギアーボックス５Ａの外側壁５ａの内壁面に取付けた点で、このように構成したギアードモータ１Ｂにしても、前記本発明を実施するための最良の第１の形態と同様な作用効果が得られる。   The third embodiment for carrying out the present invention shown in FIGS. 12 to 14 is mainly different from the best first embodiment for carrying out the present invention in that the base 11 to which the magnetic sensor 13 is attached is provided. The geared motor 1B configured as described above has the same function and effect as those of the first preferred embodiment for carrying out the present invention in that it is attached to the inner wall surface of the outer wall 5a of the gear box 5A. It is done.

本発明はギアードモータを製造する産業で利用される。   The present invention is used in the industry of manufacturing geared motors.

本発明を実施するための最良の第１の形態の一部破断正面図。The partially broken front view of the best 1st form for implementing this invention. 本発明を実施するための最良の第１の形態の左側面図。The left view of the best 1st form for implementing this invention. 本発明を実施するための最良の第１の形態の出力軸の説明図。Explanatory drawing of the output shaft of the best 1st form for implementing this invention. 図３の４−４線に沿う断面図。Sectional drawing which follows the 4-4 line of FIG. 図３の５−５線に沿う断面図。Sectional drawing which follows the 5-5 line of FIG. マグネットが取付けられた最終の変速歯車の正面図。The front view of the final transmission gear with the magnet attached. 図６の７−７線に沿う断面図。Sectional drawing in alignment with line 7-7 in FIG. センサ片間に生じる急峻な磁束波形の説明図。Explanatory drawing of the steep magnetic flux waveform which arises between sensor pieces. 本発明を実施するための第２の形態の一部破断正面図。The partially broken front view of the 2nd form for implementing this invention. マグネットが取付けられた最終の変速歯車の正面図。The front view of the final transmission gear with the magnet attached. 図１０の１１−１１線に沿う断面図。Sectional drawing which follows the 11-11 line of FIG. 本発明を実施するための第３の形態の一部破断正面図。The partially broken front view of the 3rd form for carrying out the present invention. 図１２の１３−１３線に沿う断面図。Sectional drawing which follows the 13-13 line | wire of FIG. 磁気センサを取付けたギアーボックスの説明図。Explanatory drawing of the gear box which attached the magnetic sensor.

符号の説明Explanation of symbols

１、１Ａ、１Ｂ：ギアードモータ、
２：ギアードモータ本体、 ３：駆動軸、
４：ケース、 ５、５Ａ：ギアーボックス、
６：出力軸、 ７、７Ａ：最終の変速歯車、
８、８Ａ：センサ片、 ９、９Ａ：切り欠部、
１０、１０Ａ：マグネット、 １１：基盤、
１２：急峻な磁束波形、 １３：磁気センサ、
１４、１４Ａ、１４Ｂ、１４Ｃ、１４Ｄ：変速歯車。
1, 1A, 1B: Geared motor,
2: Geared motor body, 3: Drive shaft,
4: Case, 5, 5A: Gearbox,
6: Output shaft 7, 7A: Final transmission gear,
8, 8A: sensor piece, 9, 9A: notch,
10, 10A: Magnet, 11: Base,
12: Steep magnetic flux waveform, 13: Magnetic sensor,
14, 14A, 14B, 14C, 14D: transmission gears.

Claims (2)

ギアードモータ本体と、このギアードモータ本体のギアーボックスより外方へ突出する出力軸と、この出力軸の前記ギアーボックス内に位置する部位に固定された磁性体で形成された最終の変速歯車と、この最終の変速歯車の側面に吸着状態で取付けることができる、外周部の一部に切り欠部が形成されたマグネットと、このマグネットの切り欠部に入って、該マグネットの位置決めをするとともに、該切り欠部の端部に急峻な磁束線が生じるように、前記最終の変速歯車に一体形成されたセンサ片と、前記マグネットを覆い、前記出力軸が外方へ突出するように前記ギアーボックスに取付けられた、前記マグネットの切り欠部の端部に生じる急峻な磁束線を検出する磁気センサとからなることを特徴とするギアードモータ。 A geared motor body, an output shaft projecting outward from the gear box of the geared motor body, and a final transmission gear formed of a magnetic body fixed to a portion of the output shaft located in the gear box; A magnet that can be attached to the side surface of this final transmission gear in an attracted state, a magnet having a notch formed in a part of the outer periphery, and entering the notch of the magnet to position the magnet, The gear box covers the sensor piece integrally formed with the final transmission gear and the magnet so that a steep magnetic flux line is generated at the end of the notch, and the output shaft protrudes outward. And a magnetic sensor for detecting steep magnetic flux lines generated at the end of the notch of the magnet. マグネットに形成された切り欠部は弧状あるいは台形状で、最終の変速歯車に一体成形されたセンサ片は隙間なく嵌合する弧状あるいは台形状に形成されていることを特徴とする請求項１記載のギアードモータ。
2. The cutout portion formed in the magnet has an arc shape or a trapezoidal shape, and the sensor piece integrally formed with the final transmission gear is formed in an arc shape or a trapezoid shape that fits without gap. Geared motor.
JP2006057252A 2006-03-03 2006-03-03 Geared motor Active JP4716901B2 (en)

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