JP2017025979A - Oscillation allowable coupling mechanism and inscribed planet gear device - Google Patents

Oscillation allowable coupling mechanism and inscribed planet gear device Download PDF

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JP2017025979A
JP2017025979A JP2015143434A JP2015143434A JP2017025979A JP 2017025979 A JP2017025979 A JP 2017025979A JP 2015143434 A JP2015143434 A JP 2015143434A JP 2015143434 A JP2015143434 A JP 2015143434A JP 2017025979 A JP2017025979 A JP 2017025979A
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concave surface
arc concave
gear
teeth
internal
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中村 公昭
Kimiaki Nakamura
公昭 中村
上田 孝治
Koji Ueda
孝治 上田
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Honda Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an oscillation allowable coupling mechanism which can be designed for downsizing and improves durability.SOLUTION: A coupling mechanism (40) is configured to couple a first member (12) and a second member (22) in a torque transmission relation while allowing relative eccentric oscillation caused by predetermined eccentricity (E). In the first member (12) and the second member (22), arcuate recessed surfaces (42 and 44) are formed oppositely to each other around an individual axial line in parallel with center axial lines of the members. The coupling mechanism comprises a pin (46) that is held between the arcuate recessed surface (42) of the first member (12) and the arcuate recessed surface (44) of the second member (22). The pin (46) has a smaller outer diameter than an inner diameter of the arcuate recessed surfaces (42 and 44) and is engaged to the arcuate recessed surface (42) of the first member (12) and the arcuate recessed surface (44) of the second member (22) in a rotatable manner, thereby coupling the first member (12) and the second member (22).SELECTED DRAWING: Figure 1

Description

本発明は、揺動許容の連結機構及び内接式遊星歯車装置に関し、更に詳細には、二つの部材を所定の偏心量による相対的な偏心揺動を許容してトルク伝達関係で連結する連結機構及びその連結機構を備えた内接式遊星歯車装置に関する。   The present invention relates to a rocking-permissible coupling mechanism and an inscribed planetary gear device, and more specifically, a coupling in which two members are coupled in a torque transmission relationship while allowing relative eccentric rocking by a predetermined amount of eccentricity. The present invention relates to a mechanism and an inscribed planetary gear device including the coupling mechanism.

内接式遊星歯車装置として、内周部に内歯を有する固定配置の内歯歯車(太陽歯車)と、外周部に前記内歯より少ない歯数の外歯を有して前記内歯歯車に噛合する外歯歯車(遊星歯車)と、前記内歯歯車と同一の中心軸線周りに回転し、前記外歯歯車を前記内歯歯車に対して噛合状態で転動(偏心揺動)させるように前記外歯歯車を回転自在に支持した偏心駆動部材と、前記外歯歯車に形成された軸線方向の丸孔に遊嵌合する円形横断面形状の揺動許容ピンとを有し、前記揺動許容ピンを出力部材とする内ピン取り出し方式のものが知られている(例えば、特許文献1参照)。   As an internal planetary gear device, an internal gear (sun gear) having a fixed arrangement having internal teeth on the inner periphery, and external teeth having a smaller number of teeth than the internal teeth on the outer periphery, An external gear (planetary gear) that meshes with the internal gear and rotates about the same central axis as the internal gear so that the external gear rolls (eccentrically swings) in mesh with the internal gear. An eccentric drive member that rotatably supports the external gear, and a rocking allowance pin having a circular cross-sectional shape that loosely fits in an axial round hole formed in the external gear. An internal pin take-out type using a pin as an output member is known (for example, see Patent Document 1).

内接式遊星歯車装置として、内周部に内歯を有する内歯歯車(太陽歯車)と、外周部に前記内歯より少ない歯数の外歯を有して前記内歯歯車に噛合する外歯歯車(遊星歯車)と、前記外歯歯車の軸心に連結されて前記外歯歯車をアウタハウジングに対して回転可能に支持する出力軸と、前記内歯歯車の側面より軸線方向に突出して前記アウタハウジングに形成されている変位規制孔に弾性部材を介して遊嵌合する揺動許容突子と、前記アウタハウジングに固定子されたステータ巻線部(界磁固定子)を含んで前記内歯歯車を前記外歯歯車との噛合状態で偏心揺動させる可変ギャップ式モータとを有するダイレクト駆動方式のものが知られている(例えば、特許文献2参照)。   As an internal planetary gear device, an internal gear (sun gear) having internal teeth on the inner peripheral portion, and an external gear having external teeth with fewer teeth than the internal teeth on the outer peripheral portion and meshing with the internal gear. A toothed gear (planetary gear), an output shaft connected to the shaft center of the external gear and rotatably supporting the external gear with respect to the outer housing, and protruding in an axial direction from a side surface of the internal gear. Including a swing allowing protrusion loosely fitted to a displacement restricting hole formed in the outer housing via an elastic member, and a stator winding portion (field stator) fixed to the outer housing. There is known a direct drive system having a variable gap motor that eccentrically swings an internal gear in mesh with the external gear (see, for example, Patent Document 2).

特開2007−24072号公報JP 2007-24072 A 特開平4−317552号公報JP-A-4-317552

内ピン取り出し方式の内接式遊星歯車装置では、外歯歯車の偏心揺動運動に対して揺動許容ピンの外周面が丸孔の内周面に対して摺動しつつ回転力を外歯歯車より揺動許容ピンに伝達するので、摩擦損失が大きいと共に揺動許容ピンに大きい剪断応力が作用する。このため、揺動許容ピンにローラベアリングを取り付けたり、揺動許容ピンの外径を大きくしたりする必要が生じる。また、内ピン取り出し方式の内接式遊星歯車装置では、揺動許容ピンの外径に対して丸孔の内径を外歯歯車の偏心揺動の偏心量の2倍の大きさにしなくてはならない。これらのことにより、装置を小型化することが難しい。   In the internal planetary gear unit with the inner pin take-out type, the outer peripheral surface of the swing allowable pin slides against the inner peripheral surface of the round hole with respect to the eccentric swing motion of the external gear, and the rotational force is applied to the outer teeth. Since the gear is transmitted from the gear to the rocking allowance pin, the friction loss is large and a large shear stress acts on the rocking allowance pin. For this reason, it is necessary to attach a roller bearing to the swing allowance pin or to increase the outer diameter of the swing allowance pin. Further, in the internal planetary gear device of the inner pin take-out type, the inner diameter of the round hole must be twice as large as the eccentric amount of eccentric oscillation of the external gear with respect to the outer diameter of the oscillation allowable pin. Don't be. For these reasons, it is difficult to reduce the size of the apparatus.

ダイレクト駆動方式の内接遊星歯車装置でも、弾性部材を介してであるが外歯歯車の偏心揺動運動によって揺動許容突子に剪断応力が作用することを避けることができない。また、ダイレクト駆動方式の内接式遊星歯車装置では、弾性部材が外歯歯車の偏心揺動運動のもとに弾性変形とその解除を繰り返し、揺動成分の許容(除去)が弾性部材の繰り返しの弾性変形によって行われるので、弾性部材が早期に劣化し、耐久性に欠ける。   Even in the direct drive type inscribed planetary gear device, it is unavoidable that the shearing stress acts on the swing allowable protrusion due to the eccentric swing motion of the external gear though the elastic member. In the direct drive type inscribed planetary gear device, the elastic member repeats elastic deformation and release under the eccentric oscillating motion of the external gear, and the oscillating component is allowed (removed) repeatedly. Therefore, the elastic member deteriorates early and lacks durability.

本発明が解決しようとする課題は、小型化設計が可能で、耐久性に優れた揺動許容の連結機構を提供し、併せてこの連結機構の使用のもとに、内接式遊星歯車装置の小型化設計を可能にすると共に優れた耐久性を確保することである。   The problem to be solved by the present invention is to provide a swing-allowing coupling mechanism that can be miniaturized and is excellent in durability. In addition, the use of this coupling mechanism allows an inscribed planetary gear device to be provided. It is possible to achieve a compact design and ensure excellent durability.

本発明による揺動許容の連結機構は、第1の部材(12)と第2の部材(22)とを所定の偏心量(E)による相対的な偏心揺動を許容してトルク伝達関係で連結する連結機構(40)であって、前記第1の部材(12)と前記第2の部材(22)とに、これら部材の中心軸線に平行な個別の軸線を中心とした円弧凹面(42、44)が互いに対向して形成され、前記第1の部材(12)の前記円弧凹面(42)と前記第2の部材(22)の前記円弧凹面(44)とに挟まれたピン(46)を有し、前記ピン(46)は、前記円弧凹面(42、44)の内径より小さい外径を有し、前記第1の部材(12)の前記円弧凹面(42)および前記第2の部材(22)の前記円弧凹面(44)に転動可能に係合して前記第1の部材(12)と前記第2の部材(22)とを連結している。   The coupling mechanism for allowing rocking according to the present invention allows the first member (12) and the second member (22) to be relatively eccentrically rocked by a predetermined amount of eccentricity (E) in a torque transmission relationship. A coupling mechanism (40) for coupling, wherein the first member (12) and the second member (22) are provided with arc concave surfaces (42) centered on individual axes parallel to the central axes of these members. , 44) are formed to face each other, and pin (46) sandwiched between the arc concave surface (42) of the first member (12) and the arc concave surface (44) of the second member (22). The pin (46) has an outer diameter smaller than the inner diameter of the arc concave surface (42, 44), and the arc concave surface (42) of the first member (12) and the second The first member (12) and the first member (22) are movably engaged with the arcuate concave surface (44) of the member (22). And connects the member (22).

この構成によれば、ピン(46)は第1の部材(12)の円弧凹面(42)と第1の部材(12)の円弧凹面(44)とに径方向の両側から挟まれるだけであるので、ピン(46)には圧縮力が作用するだけで、剪断力が作用することはない。   According to this configuration, the pin (46) is only sandwiched between the arc concave surface (42) of the first member (12) and the arc concave surface (44) of the first member (12) from both sides in the radial direction. Therefore, only a compressive force acts on the pin (46), and no shear force acts.

本発明による揺動許容の連結機構は、好ましくは、前記第1の部材(12)の前記円弧凹面(42)および前記第2の部材(22)の前記円弧凹面(44)が同一内径であり、前記ピン(46)の外径が前記内径より前記偏心量だけ小さい。   In the swing-allowing coupling mechanism according to the present invention, preferably, the arc concave surface (42) of the first member (12) and the arc concave surface (44) of the second member (22) have the same inner diameter. The outer diameter of the pin (46) is smaller than the inner diameter by the amount of eccentricity.

この構成によれば、ピン(46)は円弧凹面(42、44)に対して摺動することなく完全な転がり運動をする。これにより、ピン(46)および円弧凹面(42、44)の耐摩耗性が向上すると共に摩擦損失が低減する。   According to this configuration, the pin (46) makes a complete rolling motion without sliding against the arcuate concave surfaces (42, 44). This improves the wear resistance of the pin (46) and the arcuate concave surfaces (42, 44) and reduces the friction loss.

本発明による揺動許容の連結機構は、好ましくは、前記第1の部材(12)の前記円弧凹面および前記第2の部材(22)の前記円弧凹面は、円周面の一部をなして同一の軸線方向位置において互いに対向している部分(42、44)と、互いに異なる軸線方向の位置に形成された円孔の円周面による部分(48、50)とを含んでいる。   In the swing-allowing coupling mechanism according to the present invention, preferably, the arc concave surface of the first member (12) and the arc concave surface of the second member (22) form a part of a circumferential surface. It includes portions (42, 44) facing each other at the same axial position, and portions (48, 50) formed by the circumferential surfaces of the circular holes formed at different axial positions.

この構成によれば、円孔の円周面による部分(48、50)によってピン(46)が支持されることにより、ピン(46)が軸線に対して傾くような不安定な保持状態になることがない。   According to this configuration, the pin (46) is supported by the portions (48, 50) of the circumferential surface of the circular hole, so that the pin (46) is in an unstable holding state in which the pin (46) is inclined with respect to the axis. There is nothing.

本発明による内接式遊星歯車装置は、内周部に内歯(28)を有する内歯歯車(22)と、外周部に、前記内歯より少ない歯数の外歯(34)を有して前記内歯歯車(22)に噛合する外歯歯車(30)と、前記第1の部材をステータ部材(12)に固定され、前記第2の部材を前記内歯歯車(22)あるいは前記外歯歯車(30)に連結された上述の発明による連結機構(40)とを有する。   The inscribed planetary gear device according to the present invention has an internal gear (22) having internal teeth (28) on the inner peripheral portion and external teeth (34) having a smaller number of teeth than the internal teeth on the outer peripheral portion. The external gear (30) meshing with the internal gear (22), the first member is fixed to the stator member (12), and the second member is the internal gear (22) or the external gear. And a coupling mechanism (40) according to the above-described invention coupled to the toothed gear (30).

この構成によれば、連結機構(40)によって、内歯歯車(22)あるいは外歯歯車(30)の偏心揺動を許容して良好に反力の受け持ちが行われる。   According to this configuration, the coupling mechanism (40) allows the eccentric gear (22) or the external gear (30) to be eccentrically oscillated so that the reaction force is satisfactorily carried out.

本発明による内接式遊星歯車装置は、内周部に内歯(28)を有する固定配置の内歯歯車と、外周部に、前記内歯(28)より少ない歯数の外歯(34)を有して前記内歯歯車に噛合する外歯歯車(30)と、前記外歯歯車(30)と同心の回転軸(52)と、前記第1の部材を前記回転軸(52)に連結され、前記第2の部材を前記外歯歯車(30)に連結された上述の発明による連結機構(40)とを有する。   The internal planetary gear device according to the present invention includes an internal gear having a fixed arrangement having internal teeth (28) on an inner peripheral portion, and external teeth (34) having a smaller number of teeth on the outer peripheral portion than the internal teeth (28). An external gear (30) that meshes with the internal gear, a rotational shaft (52) concentric with the external gear (30), and the first member connected to the rotational shaft (52). And the connection mechanism (40) according to the above-described invention in which the second member is connected to the external gear (30).

この構成によれば、連結機構(40)によって、外歯歯車(30)の偏心揺動を許容して外歯歯車(30)から回転軸(52)へ良好にトルク伝達が行われる。   According to this configuration, the coupling mechanism (40) allows the external gear (30) to be eccentrically oscillated, and the torque is favorably transmitted from the external gear (30) to the rotating shaft (52).

本発明による揺動許容の連結機構によれば、ピンには圧縮力が作用するだけで、剪断力が作用することがないから、小型化設計が可能で、優れた耐久性が得られる。   According to the rocking-permissible coupling mechanism of the present invention, only a compressive force is applied to the pin, and no shear force is applied. Therefore, a miniaturized design is possible and excellent durability is obtained.

本発明による揺動許容の連結機構を含む内接式遊星歯車装置の一つの実施形態を示す正面図The front view which shows one Embodiment of the inscribed planetary gear apparatus containing the connection mechanism of the rocking | fluctuation tolerance by this invention. 本実施形態による内接式遊星歯車装置の半断面斜視図Half sectional perspective view of the inscribed planetary gear device according to the present embodiment 本実施形態による内接式遊星歯車装置のアウタケースの一部を取り外して示す半断面斜視図The half cross-sectional perspective view which removes and shows a part of outer case of the inscribed planetary gear apparatus by this embodiment 本実施形態による内接式遊星歯車装置の要部の断面斜視図Cross-sectional perspective view of the main part of the inscribed planetary gear device according to the present embodiment 本実施形態による内接式遊星歯車装置の要部の断面斜視図Cross-sectional perspective view of the main part of the inscribed planetary gear device according to the present embodiment 本実施形態による連結機構の動きを示す説明図Explanatory drawing which shows the motion of the connection mechanism by this embodiment. 本発明による揺動許容の連結機構を含む内接式遊星歯車装置の他の実施形態を示す正面図The front view which shows other embodiment of the internal type planetary gear apparatus containing the connection mechanism of the rocking | fluctuation tolerance by this invention. 上述した実施形態による内接式遊星歯車装置のスケルトン図Skeleton diagram of the inscribed planetary gear device according to the embodiment described above 本発明による揺動許容の連結機構を含む内接式遊星歯車装置の一つの実施形態を示すスケルトン図The skeleton figure which shows one Embodiment of the inscribed planetary gear apparatus containing the connection mechanism of the rocking | fluctuation tolerance by this invention. 本発明による揺動許容の連結機構を含む内接式遊星歯車装置の一つの実施形態を示すスケルトン図The skeleton figure which shows one Embodiment of the inscribed planetary gear apparatus containing the connection mechanism of the rocking | fluctuation tolerance by this invention.

以下に、本発明による揺動許容の連結機構および内接式遊星歯車装置(ハイポサイクロイド型減速機)の一つの実施形態を、図1〜図6を参照して説明する。   Hereinafter, one embodiment of a rocking-permissible coupling mechanism and an inscribed planetary gear device (hypocycloid speed reducer) according to the present invention will be described with reference to FIGS.

本実施形態の内接式遊星歯車装置は、ダイレクト駆動方式のものであり、アウタケース(固定部材)10を有する。アウタケース10内には円環状のステータ部材(第1の部材)12が固定されている。   The inscribed planetary gear device of this embodiment is of a direct drive type and has an outer case (fixing member) 10. An annular stator member (first member) 12 is fixed in the outer case 10.

ステータ部材12には内周より径方向内方に突出した6個の固定側突極(ティース)14が周方向に所定の間隔をおいて形成されている。各固定側突極14の根元部の外周にはステータコイル16が巻装されている。各固定側突極14の先端部にはステータ部材12の中心軸線と平行な軸線を中心とした略半円形の凹部18が形成されている。ステータ部材12には周方向に隣り合う固定側突極14間に配置されてこれらに固定された固定ブロック20が取り付けられている。   The stator member 12 is formed with six fixed-side salient poles (teeth) 14 projecting radially inward from the inner periphery at predetermined intervals in the circumferential direction. A stator coil 16 is wound around the outer periphery of the base portion of each fixed-side salient pole 14. A substantially semicircular recess 18 centering on an axis parallel to the central axis of the stator member 12 is formed at the tip of each fixed-side salient pole 14. The stator member 12 is provided with a fixed block 20 which is disposed between the fixed salient poles 14 adjacent to each other in the circumferential direction and fixed thereto.

ステータ部材12の内側には円環状の揺動部材22が偏心揺動可能に配置されている。揺動部材22は鋼板の積層体によって構成されている。揺動部材22には外周より径方向外方に突出した6個の揺動側突極(ティース)24が形成されている。揺動側突極24は、揺動部材22の中心軸線と平行な軸線を中心とした略半円形に形成され、凹部18に入り込む凸部をなしている。   An annular rocking member 22 is disposed inside the stator member 12 so as to be able to rock eccentrically. The oscillating member 22 is constituted by a laminated body of steel plates. The swing member 22 is formed with six swing-side salient poles (teeth) 24 that protrude radially outward from the outer periphery. The oscillating side salient pole 24 is formed in a substantially semicircular shape centering on an axis parallel to the central axis of the oscillating member 22, and forms a convex part that enters the concave part 18.

揺動側突極24の外径は凹部18の内径より後述する偏心量Eに等しい寸法だけ小さく、各揺動側突極24は対応する各固定側突極14の凹部18に遊嵌合、つまり間隙をおいて入り込んでいる。この間隙は、固定側突極14と揺動側突極24との間に磁束が通過する磁気ギャップ(エアギャップ)であり、ステータ部材12に対する揺動部材22の偏心揺動によって変化する可変ギャップをなす。   The outer diameter of the oscillating side salient pole 24 is smaller than the inner diameter of the recess 18 by a dimension equal to an eccentricity E described later, and each oscillating side salient pole 24 is loosely fitted in the recess 18 of each corresponding fixed side salient pole 14. In other words, it enters with a gap. This gap is a magnetic gap (air gap) through which the magnetic flux passes between the stationary salient pole 14 and the oscillating side salient pole 24, and is a variable gap that changes due to the eccentric oscillation of the oscillating member 22 with respect to the stator member 12. Make.

各揺動側突極24の根元部の外周には揺動側コイル26が巻装されている。各揺動側コイル26にはアウタケース10側から揺動部材22の偏心揺動を許容する可撓性を有するリード線(不図示)によって給電が行われる。   A swing side coil 26 is wound around the outer periphery of the base portion of each swing side salient pole 24. Power is supplied to each oscillating coil 26 by a flexible lead wire (not shown) that allows the oscillating member 22 to eccentrically oscillate from the outer case 10 side.

ステータ部材12と揺動部材22とは、後述する連結機構40によって偏心量Eによる相対的な偏心揺動を許容してトルク伝達関係で連結されている。   The stator member 12 and the swing member 22 are connected in a torque transmission relationship by allowing relative eccentric swing by the eccentric amount E by a connecting mechanism 40 described later.

揺動部材22の内周面には内歯28が形成されている。これにより、揺動部材22は内接式遊星歯車装置の内歯部材を兼ねており、内接式遊星歯車装置の入力部材をなす。   Inner teeth 28 are formed on the inner peripheral surface of the swing member 22. Accordingly, the swing member 22 also serves as an internal tooth member of the inscribed planetary gear device, and serves as an input member of the inscribed planetary gear device.

揺動部材22の内側には外歯歯車30が配置されている。外歯歯車30は、鋼板の積層体によって構成されており、ボールベアリング32によってアウタケース10に、ステータ部材12と同心で、揺動部材22に対して偏心量Eだけ偏心した自身の中心軸線周りに回転可能に支持され、出力部材をなす。なお、図1の符号Aはステータ部材12および外歯歯車30の中心を、符号Bは揺動部材22の中心を各々示している。   An external gear 30 is disposed inside the swing member 22. The external gear 30 is constituted by a laminated body of steel plates, and is concentric with the outer case 10 by a ball bearing 32 and is concentric with the stator member 12 and is eccentric about the center axis line by an eccentric amount E with respect to the swing member 22. And is rotatably supported to form an output member. 1 indicates the center of the stator member 12 and the external gear 30, and B indicates the center of the swing member 22.

外歯歯車30の外周には複数の外歯34が形成されている。外歯34は、内歯28と同一ピッチで、内歯28の歯数より少なくとも1つ以上少ない歯数設けられており、揺動部材22に対する外歯歯車30の偏心側において内歯28と噛合している。揺動部材22に対する外歯歯車30の偏心量は、偏心量Eに等しく、内歯28および外歯34の歯丈より大きい。   A plurality of external teeth 34 are formed on the outer periphery of the external gear 30. The external teeth 34 have the same pitch as the internal teeth 28 and are provided with at least one fewer teeth than the internal teeth 28, and mesh with the internal teeth 28 on the eccentric side of the external gear 30 with respect to the swing member 22. doing. The amount of eccentricity of the external gear 30 with respect to the swing member 22 is equal to the amount of eccentricity E and is larger than the tooth height of the internal teeth 28 and the external teeth 34.

連結機構40は、固定ブロック20の内周に形成された固定側円弧凹面42と、揺動部材22の外周に形成された揺動側円弧凹面44と、固定側円弧凹面42と揺動側円弧凹面44とに挟まれたピン46とを含む。なお、固定側円弧凹面42を含む固定ブロック20と固定側突極14とは必ずしも別体とする必要はなく、例えば、ステータ部材12の一部に固定側円弧凹面42が直接に形成されていてもよい。   The coupling mechanism 40 includes a fixed-side arc concave surface 42 formed on the inner periphery of the fixed block 20, a swing-side arc concave surface 44 formed on the outer periphery of the swing member 22, a fixed-side arc concave surface 42, and a swing-side arc. And a pin 46 sandwiched between the concave surfaces 44. Note that the fixed block 20 including the fixed-side arc concave surface 42 and the fixed-side salient pole 14 do not necessarily have to be separate bodies. For example, the fixed-side arc concave surface 42 is directly formed on a part of the stator member 12. Also good.

固定側円弧凹面42は、ステータ部材12の周方向に離れた6箇所に所定の間隔をおいて形成されており、各々、ステータ部材12の中心軸線に平行な個別の軸線を中心とした略半円筒状(略120〜160度円弧)の円弧面である。揺動側円弧凹面44は揺動部材22の周方向に離れた6箇所に等間隔に形成されており、各々、揺動部材22の中心軸線に平行な個別の軸線を中心とした略半円筒状(略120〜160度円弧)の円弧面である。固定側円弧凹面42と揺動側円弧凹面44とは同一内径の円弧面であり、同一の軸線方向位置においてステータ部材12および揺動部材22の径方向に互いに対向している。   The fixed-side arc concave surfaces 42 are formed at predetermined intervals at six locations separated in the circumferential direction of the stator member 12, and each of the fixed-side arc concave surfaces 42 is substantially half-centered about an individual axis parallel to the center axis of the stator member 12. It is a circular arc surface having a cylindrical shape (approximately 120 to 160 degrees arc). The oscillating side arc concave surface 44 is formed at six equal intervals in the circumferential direction of the oscillating member 22, and is substantially semi-cylindrical around an individual axis parallel to the central axis of the oscillating member 22. It is a circular arc surface of a shape (approximately 120 to 160 degrees arc). The fixed-side arc concave surface 42 and the swing-side arc concave surface 44 are arc surfaces having the same inner diameter, and are opposed to each other in the radial direction of the stator member 12 and the swing member 22 at the same axial position.

アウタケース10には、図2〜図5に示されているように、固定側円弧凹面42と同心且つ同一半径の円筒状(360度円周)の円孔48が形成されている。揺動部材22の軸線方向の両端部には、図2〜図5に示されているように、揺動側円弧凹面44と同心且つ同一の半径Rの円筒状(360度円周)の円孔50が形成されている。円孔48と50とは互いに異なる軸線方向の位置にある。   As shown in FIGS. 2 to 5, the outer case 10 is formed with a cylindrical (360 ° circumference) circular hole 48 that is concentric with the fixed-side arc concave surface 42 and has the same radius. As shown in FIGS. 2 to 5, at both ends in the axial direction of the swing member 22, a cylindrical (360 ° circumference) circle having the same radius R and concentric with the swing side arc concave surface 44. A hole 50 is formed. The circular holes 48 and 50 are at different axial positions.

ピン46は、外径が固定側円弧凹面42および揺動側円弧凹面44の内径より偏心量Eだけ小さい外径の円形横断面形状のものであり、固定側円弧凹面42および揺動側円弧凹面44に自身の中心軸線方向周りに転動可能に係合している。ピン46は、両端において円孔48に自身の中心軸線方向周りに転動可能に遊嵌合していると共に、揺動側円弧凹面44の軸線方向の外側に位置する部分において円孔50に自身の中心軸線方向周りに転動可能に遊嵌合している。   The pin 46 has a circular cross-sectional shape having an outer diameter whose outer diameter is smaller than the inner diameter of the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 by an eccentric amount E. The fixed-side arc concave surface 42 and the swing-side arc concave surface 44 is engaged so as to be able to roll around its own central axis. The pin 46 is loosely fitted to the circular hole 48 at both ends so as to be able to roll around its own central axial direction, and at the portion located on the outer side in the axial direction of the oscillating side arc concave surface 44, Are loosely fitted so as to be able to roll around the central axis.

この構造により、連結機構40は、揺動部材22をステータ部材12に対する回転位相を変化することなくステータ部材12に対して偏心量Eによる偏心揺動を許容して、揺動部材22とステータ部材12とをトルク伝達関係、この場合、反力受け止め関係で連結する。   With this structure, the coupling mechanism 40 allows the oscillating member 22 and the stator member to be eccentrically oscillated by the eccentric amount E without changing the rotational phase of the oscillating member 22 with respect to the stator member 12. 12 in a torque transmission relationship, in this case, a reaction force receiving relationship.

上述の構成により、ステータ部材12と揺動部材22とが可変ギャップ方式の電動モータをなし、各々6個のステータコイル16と揺動側コイル26とに、3相交流のU相、V相、W相の正弦波電流が所定のタイミングをもって供給されることにより、ステータ部材12の中心周りの回転磁界が発生し、外歯34が内歯28に噛み合った状態で、連結機構40の連結作用のもとに揺動部材22がステータ部材12に対して回転位相を変化することなく偏心量Eによる偏心揺動をする。   With the above-described configuration, the stator member 12 and the swing member 22 form a variable gap type electric motor, and each of the six stator coils 16 and the swing side coil 26 has a three-phase AC U phase, V phase, When the W-phase sine wave current is supplied at a predetermined timing, a rotating magnetic field around the center of the stator member 12 is generated, and the external mechanism 34 engages with the internal teeth 28 and the connection mechanism 40 is connected. Originally, the oscillating member 22 oscillates eccentrically by the eccentric amount E without changing the rotational phase with respect to the stator member 12.

この揺動部材22の偏心揺動において、ステータ部材12は、連結機構40によって揺動部材22の偏心揺動を許容して揺動部材22の偏心揺動を阻害することなく、揺動部材22から反力を受け止める反力部材をなす。これにより、外歯34の歯数をZa、内歯2による部分(48、50)8の歯数をZbとした場合、減速比G=Za/(Za−Zb)をもって外歯歯車30が減速回転する。   In the eccentric swing of the swing member 22, the stator member 12 allows the eccentric swing of the swing member 22 by the coupling mechanism 40 and does not inhibit the eccentric swing of the swing member 22. The reaction force member that receives the reaction force from is made. Accordingly, when the number of teeth of the external teeth 34 is Za and the number of teeth of the portion (48, 50) 8 by the internal teeth 2 is Zb, the external gear 30 is decelerated with a reduction ratio G = Za / (Za−Zb). Rotate.

固定側円弧凹面42の内径と揺動側円弧凹面44の内径とが同一であることにより、偏心揺動における固定側円弧凹面42および揺動側円弧凹面44に対するピン46の周速度は同一になるので、ピン46が固定側円弧凹面42および揺動側円弧凹面44に対して摺動することなく完全な転がり運動(転動)をする。これにより、ピン46と固定側円弧凹面42および揺動側円弧凹面44の耐摩耗性が向上すると共に大きい摩擦損失が生じることがない。   Since the inner diameter of the fixed-side arc concave surface 42 and the inner diameter of the swing-side arc concave surface 44 are the same, the peripheral speed of the pin 46 with respect to the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 in the eccentric swing is the same. Therefore, the pin 46 performs a complete rolling motion (rolling) without sliding with respect to the fixed-side arc concave surface 42 and the swing-side arc concave surface 44. As a result, the wear resistance of the pin 46, the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 is improved, and a large friction loss does not occur.

固定側円弧凹面42および揺動側円弧凹面44の内径とピン46の外径との差が偏心量Eになるので、ピン46の外径が決まれば、偏心量Eに対して揺動側円弧凹面44および固定側円弧凹面42を小さい内径(円弧径)で構成でき、装置の小型化を図ることができる。   Since the difference between the inner diameter of the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 and the outer diameter of the pin 46 is the eccentric amount E, if the outer diameter of the pin 46 is determined, the swing-side arc with respect to the eccentric amount E is determined. The concave surface 44 and the fixed-side arc concave surface 42 can be configured with a small inner diameter (arc diameter), and the apparatus can be downsized.

図6(I)〜(V)は、揺動部材22の一回の偏心揺動における連結機構40の動きを示している。図6(I)〜(V)において、符号Cは揺動側円弧凹面44および円孔50の中心を示している。   6 (I) to 6 (V) show the movement of the coupling mechanism 40 in one eccentric swing of the swing member 22. FIG. 6 (I) to 6 (V), the symbol C indicates the center of the swing-side arc concave surface 44 and the circular hole 50.

図6の(I)および(V)は、図5と同じ状態であり、揺動部材22の偏心揺動においてステータ部材12と揺動部材22とが最も径方向に離れた位置にある状態を示している。この状態の時には、固定側円弧凹面42および揺動側円弧凹面44の双方がピン46の外周面より離間しており、ピン46は円孔48と50とによって互いに反対側から挟まれるようにして支持されている。これによりピン46が軸線に対して傾くような不安定な保持状態になることない。   6 (I) and (V) are the same as those in FIG. 5, and the state in which the stator member 12 and the swing member 22 are at the most radially separated positions in the eccentric swing of the swing member 22. Show. In this state, both the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 are separated from the outer peripheral surface of the pin 46, and the pin 46 is sandwiched from opposite sides by the circular holes 48 and 50. It is supported. As a result, the pin 46 does not enter an unstable holding state in which it is inclined with respect to the axis.

図6の(III)は、図4と同じ状態であり、揺動部材22の偏心揺動においてステータ部材12と揺動部材22とが最も径方向に近付いた位置にある状態を示している。この状態の時には、ピン46は正対した固定側円弧凹面42と揺動側円弧凹面44とによって径方向の両側から挟まれている。   FIG. 6 (III) shows the same state as FIG. 4 and shows a state where the stator member 12 and the swing member 22 are closest to each other in the radial direction in the eccentric swing of the swing member 22. In this state, the pin 46 is sandwiched by the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 facing each other from both sides in the radial direction.

図6の(II)および(IV)は、上述した二つの状態の中間的な状態を示している。中間的な状態でも、ピン46は、正対ではないものも、固定側円弧凹面42と揺動側円弧凹面44とによって径方向の両側から挟まれている。   (II) and (IV) of FIG. 6 show an intermediate state between the two states described above. Even in the intermediate state, the pin 46, which is not directly opposed, is sandwiched by the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 from both sides in the radial direction.

これにより、(II)〜(IV)の区間では、ピン46は転動しながら固定側円弧凹面42と揺動側円弧凹面44とに径方向の両側から挟まれるだけであるので、ピン46には圧縮力が作用するだけで、剪断力が作用することはない。   Accordingly, in the section (II) to (IV), the pin 46 is only sandwiched between the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 from both sides in the radial direction while rolling. In this case, only a compressive force is applied, and no shear force is applied.

これにより、ピン46を小径化ができ、装置の小型化および軽量化を図ることができる。このようにして、小型化設計が可能で、耐久性に優れた揺動許容の連結機構および内接式遊星歯車装置を提供することができる。   Thereby, the diameter of the pin 46 can be reduced, and the size and weight of the apparatus can be reduced. In this way, it is possible to provide a swing-allowing coupling mechanism and an inscribed planetary gear device that can be miniaturized and are excellent in durability.

つぎに、本発明による揺動許容の連結機構および内接式遊星歯車装置(ハイポサイクロイド型減速機)の他の実施形態を、図7を参照して説明する。なお、図7において、図1に対応する部分は、図1に付した符号と同一の符号を付けて、その説明を省略する。   Next, another embodiment of the rocking-permissible coupling mechanism and the inscribed planetary gear device (hypocycloid speed reducer) according to the present invention will be described with reference to FIG. 7, parts corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof is omitted.

この実施形態では、連結機構40については、固定側円弧凹面42と揺動側円弧凹面44とがステータ部材12および揺動部材22の周方向に互いに対向していること以外は上述の実施形態と同一であり、この実施形態でも上述の実施形態と同等の作用、効果が得られる。なお、この実施形態では、可変ギャップ方式の電動モータが揺動側突極24に巻線がないリラクタンス型モータとして構成されている。   In this embodiment, the connecting mechanism 40 is the same as the above-described embodiment except that the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 face each other in the circumferential direction of the stator member 12 and the swing member 22. This embodiment is the same, and this embodiment can provide the same operations and effects as the above-described embodiment. In this embodiment, the variable gap type electric motor is configured as a reluctance motor in which the swinging salient pole 24 has no winding.

図8は、上述した実施形態の内接式遊星歯車の構成図であり、揺動部材22を連結された揺動部材22が入力部材をなし、外歯歯車30に出力軸52が連結されている場合には、揺動部材22とステータ部材12との間に連結機構40が設けられていることを示している。   FIG. 8 is a configuration diagram of the inscribed planetary gear according to the above-described embodiment. The swing member 22 connected to the swing member 22 serves as an input member, and the output shaft 52 is connected to the external gear 30. In this case, the coupling mechanism 40 is provided between the swing member 22 and the stator member 12.

他の実施形態として、図9に示されているように、外歯歯車30がステータ部材12に対して偏心揺動する入力部材をなし、内歯28を有する内歯歯車54に出力軸52が連結されている場合には、外歯歯車30に揺動部材22が連結され、連結機構40は揺動部材22とステータ部材12との間に設けられればよい。   As another embodiment, as shown in FIG. 9, the external gear 30 forms an input member that eccentrically swings with respect to the stator member 12, and the output shaft 52 is provided on the internal gear 54 having the internal teeth 28. In the case of being connected, the swinging member 22 is connected to the external gear 30, and the connecting mechanism 40 may be provided between the swinging member 22 and the stator member 12.

また、他の実施形態として、図10に示されているように、内歯28を有する内歯歯車54が固定で、外歯歯車30が内歯歯車54に対して偏心揺動し、外歯歯車30が出力部材である場合には、外歯歯車30と出力軸52との間に連結機構40が設けられればよい。連結機構40は、出力軸52に対する外歯歯車30の偏心揺動を許容して、外歯歯車30から出力軸52へトルク伝達を良好に行う。   As another embodiment, as shown in FIG. 10, the internal gear 54 having the internal teeth 28 is fixed, the external gear 30 is eccentrically swung with respect to the internal gear 54, and the external teeth In the case where the gear 30 is an output member, the connecting mechanism 40 may be provided between the external gear 30 and the output shaft 52. The coupling mechanism 40 allows the eccentric gear 30 to swing eccentrically with respect to the output shaft 52, and transmits torque from the external gear 30 to the output shaft 52 satisfactorily.

以上、本発明を、その好適な実施形態について説明したが、当業者であれば容易に理解できるように、本発明はこのような実施形態により限定されるものではなく、本発明の趣旨を逸脱しない範囲で適宜変更可能である。   Although the present invention has been described above with reference to preferred embodiments thereof, the present invention is not limited to such embodiments and can be deviated from the spirit of the present invention, as will be readily understood by those skilled in the art. It is possible to change appropriately within the range not to be.

例えば、固定側突極14および揺動側突極24の極数は6極に限られることなく、8極や12極等であってもよい。また連結機構40の個数も、6個や12個に限られることはない。ステータ部材12および揺動部材22が積層鋼板による場合には、固定側円弧凹面42および揺動側円弧凹面44をなくし、円孔48を有する鋼板と円孔50を有する鋼板とが櫛歯状に1枚ずつ交互に積層されてもよい。本発明による連結機構40が適用される内接式遊星歯車は、ダイレクト駆動方式のもの限られることはなく、本発明による連結機構40はクランク機構等によって外部より入力側の部材を偏心揺動させるものにも適用することができる。内歯28は揺動部材22とは別体の円環状の内歯歯車によって構成されていてもよい。凹部18および揺動側突極24の形状は、略半円形に限られることなく、半楕円形等であってもよい。   For example, the number of poles of the fixed-side salient pole 14 and the swing-side salient pole 24 is not limited to six, and may be eight or twelve. Further, the number of connection mechanisms 40 is not limited to six or twelve. When the stator member 12 and the swing member 22 are laminated steel plates, the fixed-side arc concave surface 42 and the swing-side arc concave surface 44 are eliminated, and the steel plate having the circular hole 48 and the steel plate having the circular hole 50 are comb-like. The sheets may be alternately stacked one by one. The inscribed planetary gear to which the coupling mechanism 40 according to the present invention is applied is not limited to the direct drive type, and the coupling mechanism 40 according to the present invention eccentrically swings the input side member from the outside by a crank mechanism or the like. It can also be applied to things. The internal teeth 28 may be constituted by an annular internal gear separate from the swing member 22. The shape of the recess 18 and the swinging side salient pole 24 is not limited to a substantially semicircular shape, and may be a semi-elliptical shape.

また、上記実施形態に示した構成要素は必ずしも全てが必須なものではなく、本発明の趣旨を逸脱しない限りにおいて適宜取捨選択することが可能である。   In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

10 アウタケース
12 ステータ部材
14 固定側突極
16 ステータコイル
18 凹部
20 固定ブロック
22 揺動部材
24 揺動側突極
26 揺動側コイル
28 内歯
30 外歯歯車
32 ボールベアリング
34 外歯
40 連結機構
42 固定側円弧凹面
44 揺動側円弧凹面
46 ピン
48 円孔
50 円孔
52 出力軸
54 内歯歯車
DESCRIPTION OF SYMBOLS 10 Outer case 12 Stator member 14 Fixed side salient pole 16 Stator coil 18 Recessed part 20 Fixed block 22 Oscillating member 24 Oscillating side salient pole 26 Oscillating side coil 28 Internal tooth 30 External gear 32 Ball bearing 34 External tooth 40 Connection mechanism 42 Fixed side arc concave surface 44 Oscillating side arc concave surface 46 Pin 48 Circular hole 50 Circular hole 52 Output shaft 54 Internal gear

Claims (5)

第1の部材と第2の部材とを所定の偏心量による相対的な偏心揺動を許容してトルク伝達関係で連結する連結機構であって、
前記第1の部材と前記第2の部材とに、これら部材の中心軸線に平行な軸線を中心とした円弧凹面が互いに対向して形成され、
前記第1の部材の前記円弧凹面と前記第2の部材の前記円弧凹面とに挟まれたピンを有し、前記ピンは、前記円弧凹面の内径より小さい外径を有し、前記第1の部材の前記円弧凹面および前記第2の部材の前記円弧凹面に転動可能に係合して前記第1の部材と前記第2の部材とを連結している連結機構。
A coupling mechanism that couples the first member and the second member in a torque transmission relationship while allowing relative eccentric oscillation by a predetermined amount of eccentricity;
The first member and the second member are formed with arc concave surfaces centering on an axis parallel to the central axis of these members so as to face each other,
A pin sandwiched between the arc concave surface of the first member and the arc concave surface of the second member; the pin has an outer diameter smaller than an inner diameter of the arc concave surface; A coupling mechanism that engages the arc concave surface of the member and the arc concave surface of the second member in a rollable manner to connect the first member and the second member.
前記第1の部材の前記円弧凹面および前記第2の部材の前記円弧凹面が同一内径であり、前記ピンの外径が前記内径より前記偏心量だけ小さい請求項1に記載の連結機構。   The coupling mechanism according to claim 1, wherein the arc concave surface of the first member and the arc concave surface of the second member have the same inner diameter, and the outer diameter of the pin is smaller than the inner diameter by the eccentric amount. 前記第1の部材の前記円弧凹面および前記第2の部材の前記円弧凹面は、円周面の一部をなして同一の軸線方向位置において互いに対向している部分と、互いに異なる軸線方向の位置に形成された円孔の円周面による部分とを含んでいる請求項1または2に記載の連結機構。   The arc concave surface of the first member and the arc concave surface of the second member form a part of the circumferential surface and face each other at the same axial position, and different axial positions. The connecting mechanism according to claim 1, further comprising: a portion formed by a circumferential surface of a circular hole formed in the ring. 内周部に内歯を有する内歯歯車と、
外周部に前記内歯より少ない歯数の外歯を有して前記内歯歯車に噛合する外歯歯車と、
前記第1の部材をステータ部材に固定され、前記第2の部材を前記内歯歯車あるいは前記外歯歯車に連結された請求項1から3の何れか一項に記載の連結機構とを有する内接式遊星歯車装置。
An internal gear having internal teeth on the inner periphery,
An external gear that has external teeth with a smaller number of teeth than the internal teeth on the outer peripheral portion and meshes with the internal gear;
4. An internal mechanism comprising: a coupling mechanism according to claim 1, wherein the first member is fixed to a stator member, and the second member is coupled to the internal gear or the external gear. Contact planetary gear unit.
内周部に内歯を有する固定配置の内歯歯車と、
外周部に前記内歯より少ない歯数の外歯を有して前記内歯歯車に噛合する外歯歯車と、
前記外歯歯車と同心の回転軸と、
前記第1の部材を前記回転軸に連結され、前記第2の部材を前記外歯歯車に連結された請求項1から3の何れか一項に記載の連結機構とを有する内接式遊星歯車装置。
A fixedly arranged internal gear having internal teeth on the inner periphery,
An external gear that has external teeth with a smaller number of teeth than the internal teeth on the outer peripheral portion and meshes with the internal gear;
A rotating shaft concentric with the external gear;
The inscribed planetary gear having the connecting mechanism according to any one of claims 1 to 3, wherein the first member is connected to the rotating shaft, and the second member is connected to the external gear. apparatus.
JP2015143434A 2015-07-17 2015-07-17 Oscillation allowable coupling mechanism and inscribed planet gear device Pending JP2017025979A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018189200A (en) * 2017-05-10 2018-11-29 本田技研工業株式会社 Inscribed type planetary gear device
JP2020148273A (en) * 2019-03-14 2020-09-17 本田技研工業株式会社 Inscribed type planetary gear device
JP2021523329A (en) * 2018-05-15 2021-09-02 エスアールアイ インターナショナルSRI International Shaft fitting

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Publication number Priority date Publication date Assignee Title
JPS6298046A (en) * 1985-08-23 1987-05-07 ラインフアス リミテツド Gear train
JPH01178784A (en) * 1987-12-29 1989-07-14 Toyota Autom Loom Works Ltd Scroll type compressor
WO2012011573A1 (en) * 2010-07-23 2012-01-26 株式会社ジェイテクト Speed change gear device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298046A (en) * 1985-08-23 1987-05-07 ラインフアス リミテツド Gear train
JPH01178784A (en) * 1987-12-29 1989-07-14 Toyota Autom Loom Works Ltd Scroll type compressor
WO2012011573A1 (en) * 2010-07-23 2012-01-26 株式会社ジェイテクト Speed change gear device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018189200A (en) * 2017-05-10 2018-11-29 本田技研工業株式会社 Inscribed type planetary gear device
JP2021523329A (en) * 2018-05-15 2021-09-02 エスアールアイ インターナショナルSRI International Shaft fitting
JP7218383B2 (en) 2018-05-15 2023-02-06 エスアールアイ インターナショナル shaft joint
JP2020148273A (en) * 2019-03-14 2020-09-17 本田技研工業株式会社 Inscribed type planetary gear device
JP7227800B2 (en) 2019-03-14 2023-02-22 本田技研工業株式会社 internal planetary gear

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