JP4482311B2 - Gear unit with built-in sensor - Google Patents
Gear unit with built-in sensor Download PDFInfo
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- JP4482311B2 JP4482311B2 JP2003375954A JP2003375954A JP4482311B2 JP 4482311 B2 JP4482311 B2 JP 4482311B2 JP 2003375954 A JP2003375954 A JP 2003375954A JP 2003375954 A JP2003375954 A JP 2003375954A JP 4482311 B2 JP4482311 B2 JP 4482311B2
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- gear
- ring
- input shaft
- sensor
- shaped
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Description
本発明は、センサー内蔵ギアユニットに関し、特に、ギアユニット内にセンサーを内蔵することにより、センサーを外付けすることなく回転位置を検出すると共に、遊星ギアのギア軸を輪状ロータに回転自在に支持し、全体構成を小型化するための新規な改良に関する。 The present invention relates to a gear unit with a built-in sensor, and in particular, by incorporating a sensor in the gear unit, the rotational position can be detected without externally attaching the sensor, and the gear shaft of the planetary gear can be rotatably supported by a ring-shaped rotor. In addition, the present invention relates to a novel improvement for reducing the overall configuration.
従来、入力軸の回転を1/nに減速して出力するようにしたギアユニットとしては、社内製作のみであるため、その構成を示す特許文献等は特に開示していないが、モータにはギアユニットを介してレゾルバ等のセンサーが接続されていた。 Conventionally, as a gear unit that reduces the rotation of the input shaft to 1 / n and outputs the gear unit, since it is only manufactured in-house, there is no particular disclosure of a patent document or the like showing its configuration. A sensor such as a resolver was connected via the unit.
従来のギアユニットは、以上のように構成されていたため、次のような課題が存在していた。
すなわち、ギアユニット自体にはセンサーが内蔵されていなかったため、モータの回転数又は回転角度を検出するためには、このギアユニットの前方又は外側に、エンコーダ又はレゾルバ等のセンサーを取付けなければならず、全体形状として大型化し、小型化のニーズには対応が困難であった。
Since the conventional gear unit is configured as described above, the following problems exist.
That is, since no sensor is built in the gear unit itself, in order to detect the rotation speed or rotation angle of the motor, a sensor such as an encoder or a resolver must be attached in front of or outside the gear unit. The overall shape has been increased in size, and it has been difficult to meet the needs for downsizing.
本発明によるセンサー内蔵ギアユニットは、全体形状が筒形をなし内周面に第1ギア及び輪状ステータを有するケースと、前記ケースの軸心位置に回転自在に配設され外周面に第2ギアを有する入力軸と、前記入力軸の外周位置に配設され前記第1、第2ギアに噛合する複数の遊星ギアと、前記輪状ステータの内側に回転自在に設けられ鉄芯からなる輪状ロータと、前記輪状ロータに形成された複数の支持用孔とを備え、前記遊星ギアのギア軸は前記支持用孔に回転自在に設けられ、前記入力軸の回転により、前記各遊星ギアの遊星回転を介して前記輪状ロータを前記回転より減速された1/n回転(但し、nは任意の自然数)させるようにした構成であり、また、前記各遊星ギアのギア軸には、前記輪状ロータの前記支持用孔に挿入された一端と、前記一端との間に前記遊星ギアが位置するように反対位置に形成された他端とが設けられており、前記各遊星ギアの前記他端は、円板に形成された複数の支持用孔にそれぞれ挿入されており、前記入力軸の両端位置には一対の第1、第2輪状リブが設けられ、前記第1輪状リブは前記輪状ロータの外端面に接し、前記第1輪状リブは前記円板の外端面に接している構成であり、また、前記輪状ステータは前記ケースの端面の内側に位置している構成である。
The sensor built-in gear unit according to the present invention has a cylindrical shape as a whole, a case having a first gear and a ring-shaped stator on the inner peripheral surface, and a second gear on the outer peripheral surface rotatably disposed at the axial center position of the case. An input shaft having a plurality of planetary gears disposed at an outer peripheral position of the input shaft and meshing with the first and second gears, and a ring-shaped rotor made of an iron core and rotatably provided inside the ring-shaped stator. A plurality of support holes formed in the ring-shaped rotor, the gear shaft of the planetary gear is rotatably provided in the support hole, and the planetary gears rotate by rotating the input shaft. Through which the ring-shaped rotor is rotated by 1 / n rotation (where n is an arbitrary natural number) decelerated from the rotation, and the gear shaft of each planetary gear includes the ring-shaped rotor of the ring-shaped rotor. Inserted into support hole The other end formed at the opposite position so that the planetary gear is located between the end and the one end, the other end of each planetary gear is a plurality of discs A pair of first and second ring-shaped ribs are provided at both ends of the input shaft, respectively, and the first ring-shaped rib is in contact with an outer end surface of the ring-shaped rotor, and is inserted into the support hole. The rib is configured to be in contact with the outer end surface of the disc, and the annular stator is configured to be located inside the end surface of the case.
本発明によるセンサー内蔵ギアユニットは、以上のように構成されているため、次のような効果を得ることができる。
すなわち、減速手段として遊星ギアを用い、この遊星ギアのギア軸をセンサーの輪状ロータに軸支しているため、モータの回転を検出するためのセンサーをギアユニット内に完全に内蔵することができ、かつ、小型化を得ることができる。
また、ギア付モータのモータ回転検出が可能となり、モータに回転センサーを取付ける必要がなくなる。
Since the sensor built-in gear unit according to the present invention is configured as described above, the following effects can be obtained.
That is, a planetary gear is used as a speed reduction means, and the gear shaft of this planetary gear is supported by the annular rotor of the sensor, so that a sensor for detecting the rotation of the motor can be completely incorporated in the gear unit. And size reduction can be obtained.
In addition, the motor rotation of the geared motor can be detected, eliminating the need to attach a rotation sensor to the motor.
本発明は、遊星ギアのギア軸を輪状ロータに軸支することにより、ケース内にセンサーの輪状ステータと輪状ロータとを配設し、小型化を達成できることを目的とする。 An object of the present invention is to provide a ring-shaped stator and a ring-shaped rotor of a sensor in a case by pivotally supporting a gear shaft of a planetary gear on a ring-shaped rotor, thereby achieving downsizing.
図1において符号1で示されるものは、全体形状が筒状をなし図示しないモータとの連結部1aを有するケースであり、このケース1の内周面1bには、ステータ巻線2を有し積層鉄芯等からなる輪状ステータ3及び第1ギア4が設けられている。
What is indicated by
前記ケース1の軸心位置には、中空状の入力軸5が回転自在に配設され、この入力軸5の外周の両端位置には、第1、第2輪状リブ6、7が突出して設けられ、軸方向におけるほぼ中央位置には第2ギア8が輪状に形成されている。
A hollow input shaft 5 is rotatably disposed at the axial center position of the
前記入力軸5の外周位置、すなわち、入力軸5とケース1との間には、複数の遊星ギア10が回転自在に設けられ、この遊星ギア10は前記第1ギア4及び第2ギア8に噛合し、入力軸5の回転に応じて各遊星ギア10は入力軸5の外周を自転しつつ公転することができるように構成されている。
A plurality of planetary gears 10 are rotatably provided between the outer peripheral position of the input shaft 5, that is, between the input shaft 5 and the
前記輪状ステータ3の内側には、前記入力軸5とは相対回転自在に配設された輪状ロータ11が配設され、この輪状ロータ11の外端面11aは前記第1輪状リブ6に接して位置決めがなされている。 A ring-shaped rotor 11 is disposed inside the ring-shaped stator 3 so as to be rotatable relative to the input shaft 5. An outer end surface 11 a of the ring-shaped rotor 11 is positioned in contact with the first ring-shaped rib 6. Has been made.
前記輪状ロータ11には、前記遊星ギア10の数と同数の複数の支持用孔12が形成され、この支持用孔12内には前記各遊星ギア10のギア軸13の一端13aが回転自在に支持されている。
The ring-shaped rotor 11 is formed with a plurality of support holes 12 as many as the planetary gears 10, and one
前記各遊星ギア10のギア軸13の他端13bは、前記一端13aとの間に遊星ギア10が位置するように反対位置に形成されており、前記各遊星ギア10の前記他端13bは円板14に設けられた複数の支持用孔14cにそれぞれ挿入されている。この円板14の突出部14aの外端面14bは前記第2輪状リブ7に接し、遊星ギア10の位置決めがなされている。
The other end 13b of the gear shaft 13 of each planetary gear 10 is formed at an opposite position so that the planetary gear 10 is positioned between the
前記輪状ロータ11は、前記輪状ステータ3に対応するように配設され、この輪状ステータ3と輪状ロータ11とによってセンサーであるレゾルバ20を構成し、前記輪状ステータ3は、前記ケース1の端面1Aよりも外側へ突出することなく、ケース1内に収納された状態で位置している。
The ring-shaped rotor 11 is disposed so as to correspond to the ring-shaped stator 3, and the ring-shaped stator 3 and the ring-shaped rotor 11 constitute a resolver 20 that is a sensor, and the ring-shaped stator 3 has an
次に、前述の構成において、入力軸5を回転させると、第1、第2ギア4、8を介して遊星ギア10が、入力軸5の回転の1/n回転(但し、nは任意の自然数)で遊星回転し、ギア軸13が結合された輪状ロータ11が1/n回転で公転し、輪状ステータ3のステータ巻線2によって入力軸5の回転数を検出することができる。 Next, in the above-described configuration, when the input shaft 5 is rotated, the planetary gear 10 is rotated 1 / n rotations of the input shaft 5 via the first and second gears 4 and 8 (where n is an arbitrary value) The ring-shaped rotor 11 coupled with the gear shaft 13 revolves at 1 / n rotation, and the rotation speed of the input shaft 5 can be detected by the stator winding 2 of the ring-shaped stator 3.
本発明によるギアユニットに内設されたセンサーは、レゾルバに限らず、光学式の発光体と受光体の組合せにも応用できる。 The sensor provided in the gear unit according to the present invention is not limited to the resolver but can be applied to a combination of an optical light emitter and a light receiver.
1 ケース
3 輪状ステータ
4 第1ギア
5 入力軸
6 第1輪状リブ
7 第2輪状リブ
8 第2ギア
10 遊星ギア
11 輪状ロータ
12 支持用孔
13 ギア軸
14 円板
20 レゾルバ(センサー)
DESCRIPTION OF
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JP2003375954A JP4482311B2 (en) | 2003-11-05 | 2003-11-05 | Gear unit with built-in sensor |
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JP2003375954A JP4482311B2 (en) | 2003-11-05 | 2003-11-05 | Gear unit with built-in sensor |
Publications (2)
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JP2005140210A JP2005140210A (en) | 2005-06-02 |
JP4482311B2 true JP4482311B2 (en) | 2010-06-16 |
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JP2003375954A Expired - Fee Related JP4482311B2 (en) | 2003-11-05 | 2003-11-05 | Gear unit with built-in sensor |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6348417A (en) * | 1986-08-19 | 1988-03-01 | Omron Tateisi Electronics Co | Multiple rotation type absolute encoder |
JPH0833274A (en) * | 1994-07-21 | 1996-02-02 | Shinko Electric Co Ltd | Geared motor |
JPH11262806A (en) * | 1998-03-19 | 1999-09-28 | Dia Dick Systems:Kk | Turret head device of machine tool |
JP2002034204A (en) * | 2000-07-13 | 2002-01-31 | Tamagawa Seiki Co Ltd | Rotary actuator |
-
2003
- 2003-11-05 JP JP2003375954A patent/JP4482311B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6348417A (en) * | 1986-08-19 | 1988-03-01 | Omron Tateisi Electronics Co | Multiple rotation type absolute encoder |
JPH0833274A (en) * | 1994-07-21 | 1996-02-02 | Shinko Electric Co Ltd | Geared motor |
JPH11262806A (en) * | 1998-03-19 | 1999-09-28 | Dia Dick Systems:Kk | Turret head device of machine tool |
JP2002034204A (en) * | 2000-07-13 | 2002-01-31 | Tamagawa Seiki Co Ltd | Rotary actuator |
Also Published As
Publication number | Publication date |
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JP2005140210A (en) | 2005-06-02 |
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