JP2007232082A - Reduction gear - Google Patents

Reduction gear Download PDF

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JP2007232082A
JP2007232082A JP2006054301A JP2006054301A JP2007232082A JP 2007232082 A JP2007232082 A JP 2007232082A JP 2006054301 A JP2006054301 A JP 2006054301A JP 2006054301 A JP2006054301 A JP 2006054301A JP 2007232082 A JP2007232082 A JP 2007232082A
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gear
rotating body
side rotating
output
external gear
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JP4646831B2 (en
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Shoji Yamashita
祥司 山下
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OKATSUNE HAGURUMA SEISAKUSHO K
Okatsune Gears Manufacturing Inc
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OKATSUNE HAGURUMA SEISAKUSHO K
Okatsune Gears Manufacturing Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reduction gear which has fewer component items, and is built in a compact size, and transmits rotation smoothly by reducing the run-out of the axis of a gear. <P>SOLUTION: The reduction gear comprises an input-side rotary body 1 having external gear 18, and an output-side rotary body 2 provided with an internal gear 28 having a more number of teeth than that of the external gear 18. Rotation axes L<SB>1</SB>, L<SB>2</SB>of the external gar 18 and the internal gear 28 are mutually eccentrically provided to mesh the external gear 18 and the internal gear 28 with each other. An eccentrically holding member 4 is connected to the rotary bodies 1, 2 by means of bearings 8, 9 respectively so as to be freely idled. The eccentrically holding member 4 holds the rotary bodies 1, 2 so that the eccentricity ε of the rotation axes L<SB>1</SB>, L<SB>2</SB>of the rotary bodies 1, 2 becomes constant. A drive shaft 37 of an electric motor 36 is directly interlocked to the input-side rotary body 1, and a rotation shaft 39 of a driven device 38 is directly interlocked to the output-side rotary body 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電動機(モータ)と被駆動機器を連結して動力を伝達する減速機に関するものである。   The present invention relates to a speed reducer that transmits power by connecting an electric motor (motor) and a driven device.

従来の減速機として、外接歯車付き第1ギア・外接歯車付き第2ギアを、備え、第1ギアがモータの出力軸に同一軸心状として連結されると共に、第2ギアが車輪に連結され、第1ギアが第2ギアに偏心した状態で噛合して、モータの回転を減速して車輪に伝達して駆動するものが知られている(例えば、特許文献1参照)。
特開平8−2266号公報
As a conventional speed reducer, a first gear with an external gear and a second gear with an external gear are provided. The first gear is connected to the output shaft of the motor as the same axis, and the second gear is connected to a wheel. The first gear is engaged with the second gear in an eccentric state, and the motor is driven by decelerating the rotation of the motor and transmitting it to the wheels (see, for example, Patent Document 1).
JP-A-8-2266

従来のこのような減速機は、各ギアの軸受部材等多くの部品を必要とする。また、各ギアが外接歯車同士で噛合するため、広いスペースを要し、かつ、軸受部材等の部品用のスペースも必要なので、減速機自体の構造が全体的に大きなものになる。そして、構造が複雑であるから、故障の原因も多くなり易い。また、外接歯車が回転することでグリースオイル等が飛散するが、これをガードし密封するために、これらの部品を、密封状のケーシングで包囲する必要があるので、一層、大きな構造になる。さらに、ギアが外接歯車同士で噛合して回転するので、両ギアの軸心が振れ易く、噛合の精度が低下し易い。このように、スムーズに動力伝達を行うことができなくなる虞れがある。そして、これを防ぐために軸受部材等に掛かるコストが大きくなるという欠点もある。   Such a conventional speed reducer requires many parts such as a bearing member for each gear. Further, since each gear meshes with the external gears, a large space is required and a space for parts such as a bearing member is also required, so that the structure of the speed reducer itself becomes large overall. And since the structure is complicated, the cause of failure tends to increase. In addition, grease oil or the like scatters due to the rotation of the circumscribed gear. In order to guard and seal this, these parts need to be surrounded by a sealed casing, resulting in a larger structure. Furthermore, since the gears mesh with each other and rotate, the shaft centers of both gears are likely to swing, and the meshing accuracy is likely to be reduced. Thus, there is a possibility that power transmission cannot be performed smoothly. And there also exists a fault that the cost concerning a bearing member etc. becomes large in order to prevent this.

そこで、本発明は、部品点数が少なく、コンパクトな大きさ・形状に形成することができ、しかも、ギアの軸心の振れを防止してスムーズに回転を伝達する減速機を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a speed reducer that can be formed into a compact size and shape with a small number of parts, and that smoothly transmits rotation by preventing the shaft center of a gear from swinging. And

上記目的を達成するために、本発明に係る減速機は、外接歯車を有する入力側回転体と、該外接歯車の歯数よりも多い歯数を有する内接歯車を備えた出力側回転体とを、具備し、上記外接歯車と上記内接歯車の回転軸心を相互に偏心状に配設して、上記外接歯車と上記内接歯車とを相互に噛合させた。   In order to achieve the above object, a reduction gear according to the present invention includes an input-side rotator having an external gear, and an output-side rotator having an internal gear having more teeth than the external gear. The rotational gears of the external gear and the internal gear are arranged eccentrically with each other, and the external gear and the internal gear are engaged with each other.

また、上記入力側回転体と上記出力側回転体の間にて該両回転体に夫々ベアリングを介して空転自在に接続され、かつ、該両回転体を各回転軸心の偏心距離が一定となるように保持する偏心保持部材を、備えた。   Further, between the input-side rotator and the output-side rotator, both the rotators are connected to each other via a bearing so as to be freely rotatable, and the eccentric distances of the respective rotation shafts are constant. An eccentric holding member for holding as described above was provided.

また、上記入力側回転体に外嵌する孔部を有しかつ上記出力側回転体を外包する環状包囲部を外縁に有する密封カバー部材を、備え、該密封カバー部材は、上記孔部に付設され上記入力側回転体の外周面を摺接する第1シール部材と、上記包囲部に付設され上記出力側回転体の外周面に摺接する第2シール部材と、を有する。
また、上記密封カバー部材は上記偏心保持部材に連結して固定された。
また、電動機の駆動軸を直接に上記入力側回転体に連動連結し、該被駆動機器の回転軸を直接に上記出力側回転体に連動連結した。
A sealing cover member having a hole that fits around the input-side rotator and having an outer peripheral edge surrounding the output-side rotator, the sealing cover member being attached to the hole; And a first seal member that slidably contacts the outer peripheral surface of the input-side rotator, and a second seal member that is attached to the surrounding portion and slidably contacts the outer peripheral surface of the output-side rotator.
The sealing cover member is connected and fixed to the eccentric holding member.
Further, the drive shaft of the electric motor is directly linked to the input side rotating body, and the rotating shaft of the driven device is directly linked to the output side rotating body.

本発明は、次のような著大な効果を奏する。
本発明に係る減速機は、入力側回転体の外接歯車を、出力側回転体の内接歯車に偏心して噛合させる構成なので、回転中に両軸心が振れるのを抑えることができる。よって、高精度の噛合回転をさせることができ、スムーズに回転を伝達できる。そして、電動機と被駆動機器の間に、入力側回転体及び出力側回転体を介装し、電動機と被駆動機器とを連結するようにしたので、部品点数が少なく、かつ、全体の大きさもコンパクトにすることができる。また、減速機の加工、組立が容易であり、電動機や被駆動機器等への取付に手間が掛からない。
The present invention has the following remarkable effects.
Since the speed reducer according to the present invention is configured to eccentrically mesh the external gear of the input-side rotator with the internal gear of the output-side rotator, it is possible to suppress both shafts from swinging during rotation. Therefore, highly accurate meshing rotation can be performed and rotation can be transmitted smoothly. And, since the input side rotating body and the output side rotating body are interposed between the motor and the driven device and the motor and the driven device are connected, the number of parts is small and the overall size is also It can be made compact. In addition, the reduction gear can be easily processed and assembled, and it does not take time to mount the reducer on an electric motor or a driven device.

また、入力側回転体と出力側回転体を、その間にてベアリングを介して偏心保持部材で接続するので、両回転体の軸心が振れるのを確実に防ぐことができ、一層スムーズに回転を伝達することができる。
また、密封カバー部材を回転体に取付けることにより、回転体が回転してグリース等の潤滑油が遠心力によって周囲に飛散するのをガードできると共に、漏れを確実に防ぐこともできる。よって、機器設置場所が、グリース等で汚れることを防止できる。また、密封カバー部材の取付け・取外しが容易なので、組立の手間も掛からない。
In addition, since the input side rotator and the output side rotator are connected by an eccentric holding member between them through the bearing, it is possible to reliably prevent the shafts of both the rotators from shaking and to rotate more smoothly. Can communicate.
Further, by attaching the sealing cover member to the rotating body, it is possible to guard against the rotation of the rotating body and splashing of lubricating oil such as grease to the surroundings due to centrifugal force, and it is possible to reliably prevent leakage. Therefore, it is possible to prevent the equipment installation location from being contaminated with grease or the like. Moreover, since the sealing cover member can be easily attached and removed, it does not require assembling work.

以下、実施の形態を示す図面に基づき、本発明を詳説する。
図1〜図10は本発明に係る減速機の実施の一形態を示し、電動機(モータ)36と洗浄機のポンプ等の被駆動機器38の間に介装されて回転を減速して伝達するものである。この減速機は、外接歯車18を有する入力側回転体1と、外接歯車18の歯数N1 よりも多い歯数N2 を有する内接歯車28を備えた出力側回転体2とを、具備する。
先ず、図1〜図4に示したように、入力側回転体1は、電動機36の駆動軸37が差込固定される差込孔部11を有する円筒部12と、円筒部12の他端寄りの部位に外径方向へ突設された外接歯車18と、を一体状に有し、差込孔部11と外接歯車18とは同一の第1軸心L1 を有するように形成される。また、円筒部12の外周面10は、その他端縁部に、(後述の)ベアリング8が外嵌して固着する固着面部13が、小段差部13aをもって形成される。また、円筒部12の差込孔部11は、電動機36の駆動軸37に形成されたキーが係合するキー溝11aを、軸心L1 方向に有する。円筒部12には、雌ネジ孔が、内・外周面にかけて貫孔されていて、この雌ネジ孔に雄ネジを螺着して駆動軸37の外周面を押圧する(あるいは、キーに形成された凹部に嵌まる)ことで、駆動軸37が抜止めされる。
なお、動力の入力側(電動機側)を一の側とし、出力側(被駆動機器側)を他の側とする。
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
FIGS. 1 to 10 show an embodiment of a speed reducer according to the present invention, which is interposed between an electric motor (motor) 36 and a driven device 38 such as a pump of a washing machine, and transmits the speed reduced. Is. This reduction device includes an input-side rotator 1 having an external gear 18 and an output-side rotator 2 having an internal gear 28 having a number of teeth N 2 larger than the number of teeth N 1 of the external gear 18. To do.
First, as shown in FIGS. 1 to 4, the input side rotating body 1 includes a cylindrical portion 12 having an insertion hole portion 11 into which a drive shaft 37 of an electric motor 36 is inserted and fixed, and the other end of the cylindrical portion 12. The external gear 18 projecting in the outer radial direction at the close part is integrally formed, and the insertion hole 11 and the external gear 18 are formed to have the same first axis L 1. . Further, the outer peripheral surface 10 of the cylindrical portion 12 is formed with a small step portion 13a on the other end edge portion, with a fixing surface portion 13 to which a bearing 8 (described later) is fitted and fixed. Moreover, insertion holes 11 of the cylindrical portion 12, the key groove 11a of the key formed on the drive shaft 37 of the motor 36 is engaged, with the axis L 1 direction. The cylindrical portion 12 has a female screw hole extending through the inner and outer peripheral surfaces, and a male screw is screwed into the female screw hole to press the outer peripheral surface of the drive shaft 37 (or a key is formed). The drive shaft 37 is prevented from being pulled out.
The power input side (motor side) is one side, and the output side (driven device side) is the other side.

次に、図1,図2に示したように、出力側回転体2は、被駆動機器38の回転軸39が差込まれる円盤状回転部材20と、内接歯車28を有し回転部材20に固着されるリング状歯車部材26と、を具備する。
具体的には、図1,図2,図5,図6に於て、回転部材20は、円盤部25と、円盤部25の外周縁を一方側に折曲状に形成した折曲周状部21と、円盤部25の他面の中央部に突設され被駆動機器38の回転軸39が差込まれる差込円筒部22と、を一体状に有し、この差込円筒部22と折曲周状部21とは同一の第2軸心L2 を有するように形成される。差込円筒部22の差込孔部23は、被駆動機器38の回転軸39のキーが係合するキー溝23aが軸心L2 方向に形成される。また、差込円筒部22には、雌ネジ孔が内・外周面にかけて貫孔されていて、この雌ネジ孔に雄ネジを螺着して回転軸39の外周面を押圧することで、回転軸39が抜止めされる。また、円盤部25の一側の面は、(後述の)ラジアルベアリング9を内嵌して固着するベアリング嵌着凹部24が、第2軸心L2 と同一軸心状に凹設される。図例では、ベアリング嵌着凹部24と差込孔部23は連続状に形成されている。また、折曲周状部21の内周面は、一端縁側が段差部をもって拡径状に形成され、歯車部材26を内嵌して固着する固着内面部21bを、有する。
また、図1,図7,図8に於て、リング状歯車部材26は短円筒形に形成され、内周面に内接歯車28を有する。そして、歯車部材26の外周縁の他側には段差部27が形成されており、歯車部材26の段差部27を、回転部材20の固着内面部21bに嵌着すれば、出力側回転体2が形成される(図1参照)。
Next, as shown in FIGS. 1 and 2, the output side rotating body 2 includes a disk-shaped rotating member 20 into which the rotating shaft 39 of the driven device 38 is inserted, and an internal gear 28. And a ring-shaped gear member 26 that is fixed to the ring.
Specifically, in FIGS. 1, 2, 5, and 6, the rotating member 20 has a disk portion 25 and a bent circumferential shape formed by bending the outer peripheral edge of the disk portion 25 on one side. Part 21 and an insertion cylindrical part 22 projecting from the central part of the other surface of the disk part 25 and into which the rotation shaft 39 of the driven device 38 is inserted, and this insertion cylindrical part 22 The bent circumferential portion 21 is formed to have the same second axis L 2 . Insertion hole 23 of the insertion cylindrical portion 22, the key groove 23a of the key of the rotating shaft 39 of the driven device 38 is engaged is formed in the axial L 2 direction. The insertion cylindrical portion 22 has a female screw hole extending through the inner and outer peripheral surfaces. The male screw is screwed into the female screw hole to press the outer peripheral surface of the rotary shaft 39, thereby rotating the insertion cylindrical portion 22. The shaft 39 is retained. The surface of one side of the disk portion 25, the bearing fitting recess 24 to fix it fitted in the (described later) radial bearing 9 is recessed in the second axis L 2 of the same axis shape. In the illustrated example, the bearing fitting recess 24 and the insertion hole 23 are formed continuously. Further, the inner peripheral surface of the bent peripheral portion 21 has a fixed inner surface portion 21b that is formed in an enlarged diameter shape with a stepped portion at one end edge side and to which the gear member 26 is fitted and fixed.
1, 7, and 8, the ring-shaped gear member 26 is formed in a short cylindrical shape and has an internal gear 28 on the inner peripheral surface. A stepped portion 27 is formed on the other side of the outer peripheral edge of the gear member 26, and if the stepped portion 27 of the gear member 26 is fitted to the fixed inner surface portion 21 b of the rotating member 20, the output side rotating body 2. Is formed (see FIG. 1).

また、図1,図2,図9,図10に示したように、入力側回転体1と出力側回転体2の間には、両回転体1,2を各回転軸心L1 ,L2 の偏心距離εが一定となるように保持する偏心保持部材4が、配設される。偏心保持部材4は、両回転体1,2に夫々ラジアルベアリング8,9を介して空転自在に接続される。
具体的には、偏心保持部材4は略平板形状を有し、偏心保持部材4の他側の面の略中央部には、上記第2軸心L2 と同一軸心を有し、出力側回転体2のベアリング嵌着凹部24に(ベアリング9を介して)嵌合する短円柱状嵌着凸部42が、突設される。また、偏心保持部材4の一側の面には、上記第1軸心L1 を中心とし、入力側回転体1の固着面部13を(ベアリング8を介して)嵌合するための円形状の嵌着凹部41が、形成される。上述のように、軸心L1 ,L2 は一定の偏心距離εを有するので、嵌着凹部41は、偏心保持部材4に於て、中央から外れた位置に形成されることになる。
また、偏心保持部材4の一側の面には、後述の連結用ボルト6が螺着する雌ネジ43が、嵌着凹部41とは(第2軸心L2 に対し)略対称の位置に形成される。
As shown in FIGS. 1, 2, 9, and 10, between the input side rotary body 1 and the output side rotary body 2, both rotary bodies 1 and 2 are connected to the rotation axis L 1 , L. An eccentric holding member 4 that holds the eccentric distance ε of 2 to be constant is disposed. The eccentric holding member 4 is connected to both rotating bodies 1 and 2 via radial bearings 8 and 9, respectively, so as to freely rotate.
Specifically, the eccentric holding member 4 has a substantially flat plate shape, and has the same axis as the second axis L 2 at the substantially central portion of the other side surface of the eccentric holding member 4, and is on the output side. A short columnar fitting convex portion 42 that fits into the bearing fitting concave portion 24 of the rotating body 2 (via the bearing 9) is projected. Also, on one side surface of the eccentric retainer member 4, the first around the axis L 1, the fixation surface portion 13 of the input side rotating body 1 (via the bearing 8) for mating circular A fitting recess 41 is formed. As described above, since the shaft centers L 1 and L 2 have a certain eccentric distance ε, the fitting recess 41 is formed at a position off the center in the eccentric holding member 4.
Further, on one side of the eccentric holding member 4, a female screw 43 to which a connecting bolt 6 to be described later is screwed is positioned substantially symmetrically with respect to the fitting recess 41 (with respect to the second axis L 2 ). It is formed.

また、図1に於て、本発明に係る減速機は、入力側回転体1・出力側回転体2を包囲し、外接歯車18・内接歯車28に付けたグリース等の潤滑油が回転により飛散するのをガードする略円板状密封カバー部材3を、備える。密封カバー部材3は、円板状固定板部30を有し、かつ、固定板部30は、その外周縁が他側に折曲られて、出力側回転体2の折曲周状部21を外側から包囲する環状包囲部34が、形成され、かつ、入力側回転体1に外嵌する孔部30aが、軸心方向に貫設されている。そして、密封カバー部材3は、孔部30aに付設され入力側回転体1の外周面10に摺接する第1シール部材31と、包囲部34に付設され出力側回転体2の折曲周状部21の外周面21aに摺接する第2シール部材32と、を有する。第1・第2シール部材31,32は、例えばオイルシール等を用いる。
そして、密封カバー部材3は偏心保持部材4に連結状に固定される。具体的には、密封カバー部材3の固定板部30は、その他面に、偏心保持部材4に連結状に固定するための固定用円筒部33が、突設されている。そして、固定用円筒部33の内側の孔部は、その奥部から一側の面にかけて貫設されて、ボルト6が挿通可能である。
In FIG. 1, the speed reducer according to the present invention surrounds the input side rotating body 1 and the output side rotating body 2, and lubricating oil such as grease attached to the external gear 18 and the internal gear 28 is rotated by rotation. A substantially disc-shaped sealing cover member 3 that guards against scattering is provided. The sealing cover member 3 has a disk-shaped fixed plate portion 30, and the fixed plate portion 30 has its outer peripheral edge bent to the other side, and the bent peripheral portion 21 of the output side rotating body 2 is formed. An annular encircling portion 34 that encloses from the outside is formed, and a hole 30a that is fitted around the input-side rotator 1 is penetrated in the axial direction. The sealing cover member 3 includes a first seal member 31 attached to the hole 30a and slidably in contact with the outer peripheral surface 10 of the input-side rotator 1, and a bent peripheral portion of the output-side rotator 2 attached to the surrounding portion 34. And a second seal member 32 slidably in contact with the outer peripheral surface 21a of 21. The first and second seal members 31 and 32 use, for example, oil seals.
The sealing cover member 3 is fixed to the eccentric holding member 4 in a connected manner. Specifically, the fixing plate portion 30 of the sealing cover member 3 is provided with a fixing cylindrical portion 33 for fixing to the eccentric holding member 4 in a connected manner on the other surface. And the hole inside the cylindrical part 33 for fixation is penetrated from the inner part to the surface of one side, and the volt | bolt 6 can be penetrated.

次に、減速機の組立と、電動機36,被駆動機器38への取付けの手順を説明する。
図1に於て、先ず、出力側回転体2のベアリング嵌着凹部24に、ラジアルベアリング9を嵌着すると共に、このベアリング9の内輪に、偏心保持部材4の嵌着凸部42を嵌着する。そして、偏心保持部材4の嵌着凹部41にラジアルベアリング8を嵌着すると共に、入力側回転体1の固着面部13をベアリング8の内輪に嵌着する。このとき、入力側回転体1の外接歯車18が、出力側回転体2の内接歯車28に噛合し、各回転体1,2は、その軸心L1 ,L2 が一定の偏心距離εを保った状態で、配設される。
そして、密封カバー部材3を、孔部30a・包囲部34によって、入力側回転体1・出力側回転体2に外嵌して、第1・第2シール部材31,32を、夫々、入力側回転体1の外周面10、出力側回転体2の折曲周状部21の外周面21aに、摺接させる。そして、ボルト6を密封カバー部材3の固定用円筒部33に挿通して、偏心保持部材4の雌ネジ43に螺着すれば、密封カバー部材3は、偏心保持部材4に対して連結状に固定される。上述の手順で、減速機のセットが完了する。
Next, the procedure for assembling the reducer and attaching it to the electric motor 36 and the driven device 38 will be described.
In FIG. 1, first, the radial bearing 9 is fitted into the bearing fitting concave portion 24 of the output side rotating body 2, and the fitting convex portion 42 of the eccentric holding member 4 is fitted into the inner ring of the bearing 9. To do. Then, the radial bearing 8 is fitted into the fitting recess 41 of the eccentric holding member 4, and the fixing surface portion 13 of the input side rotating body 1 is fitted to the inner ring of the bearing 8. At this time, the external gear 18 of the input-side rotator 1 meshes with the internal gear 28 of the output-side rotator 2, and each of the rotators 1 and 2 has an eccentric distance ε whose axes L 1 and L 2 are constant. It is arrange | positioned in the state which maintained.
Then, the sealing cover member 3 is externally fitted to the input side rotating body 1 and the output side rotating body 2 through the hole 30a and the surrounding portion 34, and the first and second seal members 31 and 32 are respectively connected to the input side. The outer peripheral surface 10 of the rotating body 1 and the outer peripheral surface 21a of the bent peripheral portion 21 of the output-side rotating body 2 are brought into sliding contact. Then, when the bolt 6 is inserted into the fixing cylindrical portion 33 of the sealing cover member 3 and screwed into the female screw 43 of the eccentric holding member 4, the sealing cover member 3 is connected to the eccentric holding member 4. Fixed. The setting of the reduction gear is completed by the above procedure.

次いで、被駆動機器38を基台7の上に固定し、被駆動機器38の回転軸39に、減速機の出力側回転体2の差込円筒部22を外嵌させ、かつ、ビスを差込円筒部22の雌ネジに螺着して回転軸39の抜止めをする。回転軸39のキーはキー溝23aに係合している。次いで、電動機36の駆動軸37を入力側回転体1の差込孔部11に差込みながら、電動機36を基台7上に置き、そして固定する。また、ビスを回転体1の雌ネジに螺着して、駆動軸37の抜止めをする。このようにして、電動機36の駆動軸37を直接に入力側回転体1に連動連結し、被駆動機器38の回転軸39を直接に出力側回転体2に連動連結したものとなる。   Next, the driven device 38 is fixed on the base 7, the insertion cylindrical portion 22 of the output side rotating body 2 of the speed reducer is externally fitted to the rotating shaft 39 of the driven device 38, and the screw is inserted. The rotary shaft 39 is prevented from being pulled out by being screwed onto the female screw of the embedded cylindrical portion 22. The key of the rotary shaft 39 is engaged with the key groove 23a. Next, the electric motor 36 is placed on the base 7 and fixed while the drive shaft 37 of the electric motor 36 is inserted into the insertion hole 11 of the input side rotating body 1. Further, a screw is screwed onto the female screw of the rotating body 1 to prevent the drive shaft 37 from being removed. In this way, the drive shaft 37 of the electric motor 36 is directly linked to the input side rotating body 1 and the rotating shaft 39 of the driven device 38 is directly linked to the output side rotating body 2.

そして、電動機36が始動すると、駆動軸37に伴って入力側回転体1が第1軸心L1 廻りに回転し、これに噛合する出力側回転体2が第2軸心L2 廻りに減速回転する。これに伴って、回転軸39が回転して被駆動機器38が駆動する。偏心保持部材4は、ベアリング8,9によって両回転体1,2に空転自在に接続され、かつ、回転体1,2が相互に偏心した第1・第2軸心L1 ,L2 廻りに回転するので、偏心保持部材4は非回転状態に保たれる。そして、偏心保持部材4により、両回転体1,2は、各軸心L1 ,L2 の偏心距離εが一定に保持され、かつ、相互に振れないので、円滑に回転する。このように、従来の減速機に用いられていたVベルトやプーリに代替可能であり、かつ、組立も容易となって、電動機36・被駆動機器38への取付にも手間が掛からない。
また、密封カバー部材3は、偏心保持部材4に連結されており、両回転体1,2の回転に連れ廻りすることがない。従って、密封カバー部材3の第1・第2シール部材31,32は、夫々、回転体1,2に摺接し、確実に密封状態が保たれる。
When the motor 36 is started, the input-side rotating body 1 with the drive shaft 37 rotates the first axis L 1 around, the output side rotating body 2 that meshes with this reduction in the second axis L 2 around Rotate. Along with this, the rotating shaft 39 rotates and the driven device 38 is driven. The eccentric holding member 4 is connected to both rotary bodies 1 and 2 by bearings 8 and 9 so as to freely rotate, and the first and second axial centers L 1 and L 2 where the rotary bodies 1 and 2 are eccentric from each other. Since it rotates, the eccentric holding member 4 is maintained in a non-rotating state. Then, the eccentric holding member 4 allows the rotating bodies 1 and 2 to rotate smoothly because the eccentric distance ε of the shaft centers L 1 and L 2 is held constant and cannot be shaken with each other. Thus, it can be replaced with a V-belt or pulley used in a conventional speed reducer, and the assembly is facilitated, so that the mounting on the motor 36 and the driven device 38 is not troublesome.
Further, the sealing cover member 3 is connected to the eccentric holding member 4 and does not rotate with the rotation of both the rotary bodies 1 and 2. Therefore, the first and second seal members 31 and 32 of the sealing cover member 3 are in sliding contact with the rotating bodies 1 and 2, respectively, and the sealed state is reliably maintained.

また、両回転体1,2の外接歯車18・内接歯車28に表面硬化処理を施すことにより、潤滑油を供給しなくても、両歯車18,28が円滑に噛合して、スムーズに回転する。また、この場合、上述のような密封カバー部材3が不要である。表面硬化処理は、例えば、窒化処理、DLC(ダイヤモンド・ライク・コーティング)処理、PVD処理等がある。
なお、被駆動機器38としては、ポンプ以外にも、回転駆動力を入力して駆動する様々な機械があり、上述と同様に連結される。また、(図示省略するが、)ベアリング8,9自体を密封構造として内部のグリース等の外部への漏洩を防止するのが好ましい。
In addition, by subjecting the external gear 18 and internal gear 28 of both rotating bodies 1 and 2 to surface hardening, both gears 18 and 28 mesh smoothly and rotate smoothly without supplying lubricating oil. To do. In this case, the sealing cover member 3 as described above is unnecessary. Examples of the surface hardening treatment include nitriding treatment, DLC (Diamond Like Coating) treatment, PVD treatment, and the like.
In addition to the pump, the driven device 38 includes various machines that are driven by inputting rotational driving force, and are connected in the same manner as described above. Further, it is preferable (not shown) that the bearings 8 and 9 themselves have a sealed structure to prevent leakage of internal grease and the like to the outside.

以上のように、本発明に係る減速機は、外接歯車18を有する入力側回転体1と、外接歯車18の歯数N1 よりも多い歯数N2 を有する内接歯車28を備えた出力側回転体2とを、具備し、外接歯車18と内接歯車28の回転軸心L1 ,L2 を相互に偏心状に配設して、外接歯車28と内接歯車18とを相互に噛合させたものなので、加工、組立が容易であり、電動機や被駆動機器等への取付に手間が掛からない。また、外接歯車同士を噛合させて回転を伝達するギアと違い、軸受部材が不要であり、部品点数が少なくて済む。しかも、外接させる噛合に比べて、全体の大きさをコンパクトにできる。また、回転中にも、両軸心L1 ,L2 が振れるのを抑えられるので、高精度に噛合・回転させることができ、スムーズに回転を伝達できる。 As described above, the speed reducer according to the present invention has an output provided with the input side rotating body 1 having the external gear 18 and the internal gear 28 having the number N 2 of teeth greater than the number N 1 of the external gear 18. And the rotational axes L 1 and L 2 of the external gear 18 and the internal gear 28 are arranged eccentrically with each other so that the external gear 28 and the internal gear 18 are mutually connected. Since they are meshed, they are easy to process and assemble, and do not require time and effort for mounting on an electric motor or driven device. Also, unlike a gear that transmits rotation by meshing external gears, a bearing member is not required and the number of parts can be reduced. In addition, the overall size can be made compact compared to the meshing that circumscribes. Further, since both shaft centers L 1 and L 2 can be prevented from swinging during rotation, the shafts can be meshed and rotated with high accuracy, and the rotation can be transmitted smoothly.

また、入力側回転体1と出力側回転体2の間にて両回転体1,2に夫々ベアリング8,9を介して空転自在に接続され、かつ、両回転体1,2を各回転軸心L1 ,L2 の偏心距離εが一定となるように保持する偏心保持部材4を、備えているので、常時静止状態の偏心保持部材4にて駆動軸37(入力側回転体1)は両持梁状に支持されて安定保持され、かつ、回転軸39(差込円筒部22)は両持梁状に支持されて安定保持される。このように、両回転体1,2の軸心L1 ,L2 が振れるのを確実に防ぐことができ、外接歯車18と内接歯車28の噛合部位の歯相互のバックラッシュを常に一定に高精度に保ち、一層スムーズに回転させることができる。 Further, between the input-side rotator 1 and the output-side rotator 2, both the rotators 1 and 2 are rotatably connected to the two rotators 1 and 2 via bearings 8 and 9, respectively. Since the eccentric holding member 4 is provided to hold the eccentric distances ε of the centers L 1 and L 2 so as to be constant, the drive shaft 37 (input-side rotating body 1) is held by the eccentric holding member 4 that is always stationary. The rotary shaft 39 (inserted cylindrical portion 22) is supported and stably held in the form of a both-end supported beam. In this way, it is possible to reliably prevent the shaft centers L 1 and L 2 of the rotating bodies 1 and 2 from swinging, and the backlash between the teeth of the meshing portion of the external gear 18 and the internal gear 28 is always constant. High accuracy can be maintained and it can be rotated more smoothly.

また、入力側回転体1に外嵌する孔部30aを有しかつ出力側回転体2を外包する環状包囲部34を外縁に有する密封カバー部材3を、備え、密封カバー部材3は、孔部30aに付設され入力側回転体1の外周面10を摺接する第1シール部材31と、包囲部34に付設され出力側回転体2の外周面に摺接する第2シール部材32と、を有するので、回転体1,2が回転してグリース等の潤滑油が遠心力によって周囲に飛散するのをガードできると共に、漏れを確実に防ぐこともできる。よって、機器設置場所が、グリース等で汚れることを防止できる。しかも、密封カバー部材3の取付け・取外しが容易なので、組立の手間も掛からない。   The sealing cover member 3 has a hole 30a that fits externally on the input-side rotator 1 and an annular enclosure 34 that surrounds the output-side rotator 2 on the outer edge. Since it has the 1st seal member 31 attached to 30a, and slidably contacts the outer peripheral surface 10 of the input side rotary body 1, and the 2nd seal member 32 attached to the enclosure part 34 and slidably contacts the outer peripheral surface of the output side rotary body 2 Rotating bodies 1 and 2 can be rotated to prevent lubricating oil such as grease from being scattered around by centrifugal force, and leakage can be reliably prevented. Therefore, it is possible to prevent the equipment installation location from being contaminated with grease or the like. In addition, since the sealing cover member 3 can be easily attached and detached, it does not require assembling work.

また、密封カバー部材3は偏心保持部材4に連結して固定されているので、偏心保持部材4が非回転に保たれることから、密封カバー部材3も非回転の状態に保つことができて、漏れを確実に防ぐことができる。かつ、歯車噛合部に人の手や衣類が巻き込まれる等の危険を防止されて、安全性も維持できる。   Further, since the sealing cover member 3 is connected and fixed to the eccentric holding member 4, the eccentric holding member 4 is kept non-rotating, and therefore the sealing cover member 3 can also be kept non-rotating. , Can surely prevent leakage. In addition, it is possible to prevent dangers such as human hands and clothing getting caught in the gear meshing portion, and to maintain safety.

また、電動機36の駆動軸37を直接に入力側回転体1に連動連結し、被駆動機器38の回転軸39を直接に出力側回転体2に連動連結したので、Vベルトやプーリ等の動力伝達用の部材が不要であり、部品点数を少なくできると共に、コンパクトな構造にすることができる。   Further, since the drive shaft 37 of the electric motor 36 is directly linked to the input-side rotating body 1 and the rotating shaft 39 of the driven device 38 is directly linked to the output-side rotating body 2, the power of the V belt, pulley, etc. A transmission member is unnecessary, the number of parts can be reduced, and a compact structure can be achieved.

本発明に係る減速機の実施の一形態を示す断面側面図である。It is a section side view showing one embodiment of a reduction gear concerning the present invention. 図1のA−A断面図である。It is AA sectional drawing of FIG. 入力側回転体を示す断面側面図である。It is a cross-sectional side view which shows an input side rotary body. 正面図である。It is a front view. 出力側回転体の回転部材を示す断面側面図である。It is a cross-sectional side view which shows the rotation member of an output side rotary body. 正面図である。It is a front view. 出力側回転体の歯車部材を示す断面側面図である。It is a cross-sectional side view which shows the gear member of an output side rotary body. 正面図である。It is a front view. 偏心保持部材を示す断面側面図である。It is a cross-sectional side view which shows an eccentric holding member. 正面図である。It is a front view.

符号の説明Explanation of symbols

1 入力側回転体
2 出力側回転体
3 密封カバー部材
4 偏心保持部材
8 ベアリング
9 ベアリング
10 外周面
18 外接歯車
28 内接歯車
30a 孔部
31 第1シール部材
32 第2シール部材
34 包囲部
36 電動機
37 駆動軸
38 被駆動機器
39 回転軸
ε 偏心距離
1 ,L2 軸心
1 ,N2 歯数
DESCRIPTION OF SYMBOLS 1 Input side rotary body 2 Output side rotary body 3 Sealing cover member 4 Eccentric holding member 8 Bearing 9 Bearing
10 Outer surface
18 External gear
28 Internal gear
30a hole
31 First seal member
32 Second seal member
34 Siege
36 electric motor
37 Drive shaft
38 Driven equipment
39 Rotating shaft ε Eccentric distance L 1 , L 2 shaft center N 1 , N 2 Number of teeth

Claims (5)

外接歯車(18)を有する入力側回転体(1)と、該外接歯車(18)の歯数(N1 )よりも多い歯数(N2 )を有する内接歯車(28)を備えた出力側回転体(2)とを、具備し、上記外接歯車(18)と上記内接歯車(28)の回転軸心(L1 )(L2 ) を相互に偏心状に配設して、上記外接歯車(18)と上記内接歯車(28)とを相互に噛合させたことを特徴とする減速機。 An output having an input side rotating body (1) having an external gear (18) and an internal gear (28) having a number of teeth (N 2 ) larger than the number of teeth (N 1 ) of the external gear (18). A rotating body (2), and the rotational axes (L 1 ) and (L 2 ) of the external gear (18) and the internal gear (28) are arranged eccentrically with respect to each other. A reduction gear characterized in that an external gear (18) and the internal gear (28) are meshed with each other. 上記入力側回転体(1)と上記出力側回転体(2)の間にて該両回転体(1)(2)に夫々ベアリング(8)(9)を介して空転自在に接続され、かつ、該両回転体(1)(2)を各回転軸心(L1 )(L2 ) の偏心距離(ε)が一定となるように保持する偏心保持部材(4)を、備えた請求項1記載の減速機。 Between the input side rotary body (1) and the output side rotary body (2), the rotary bodies (1) and (2) are connected to the rotary bodies via bearings (8) and (9), respectively, so as to freely rotate. And an eccentric holding member (4) for holding the rotary bodies (1) and (2) so that the eccentric distances (ε) of the rotary shafts (L 1 ) and (L 2 ) are constant. 1. The reducer according to 1. 上記入力側回転体(1)に外嵌する孔部(30a)を有しかつ上記出力側回転体(2)を外包する環状包囲部(34)を外縁に有する密封カバー部材(3)を、備え、該密封カバー部材(3)は、上記孔部(30a)に付設され上記入力側回転体(1)の外周面(10)を摺接する第1シール部材(31)と、上記包囲部(34)に付設され上記出力側回転体(2)の外周面に摺接する第2シール部材(32)と、を有する請求項1又は2記載の減速機。   A sealing cover member (3) having a hole (30a) fitted around the input side rotating body (1) and having an annular surrounding portion (34) surrounding the output side rotating body (2) at the outer edge; The sealing cover member (3) includes a first seal member (31) attached to the hole (30a) and slidably contacting the outer peripheral surface (10) of the input side rotating body (1), and the surrounding portion ( The speed reducer according to claim 1 or 2, further comprising: a second seal member (32) attached to 34) and in sliding contact with the outer peripheral surface of the output side rotating body (2). 上記密封カバー部材(3)は上記偏心保持部材(4)に連結して固定された請求項3記載の減速機。   The speed reducer according to claim 3, wherein the sealing cover member (3) is connected and fixed to the eccentric holding member (4). 電動機(36)の駆動軸(37)を直接に上記入力側回転体(1)に連動連結し、該被駆動機器(38)の回転軸(39)を直接に上記出力側回転体(2)に連動連結した請求項1,2,3又は4記載の減速機。   The drive shaft (37) of the electric motor (36) is directly linked to the input side rotating body (1), and the rotating shaft (39) of the driven device (38) is directly connected to the output side rotating body (2). The speed reducer according to claim 1, 2, 3, or 4, linked to
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010038323A (en) * 2008-08-07 2010-02-18 Honda Motor Co Ltd Motor with reduction gear
JP2011011706A (en) * 2009-07-06 2011-01-20 Mazda Motor Corp Drive unit for hybrid vehicle
KR20170000349A (en) * 2015-06-23 2017-01-02 가부시끼가이샤 산쿄 세이사쿠쇼 A power transmission apparatus with an inscribed cam and cylinderical pinions

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4957771U (en) * 1972-09-04 1974-05-21
JPS5174683U (en) * 1974-12-11 1976-06-11
JPH0583507U (en) * 1992-04-16 1993-11-12 石山 文鎔 Drive mechanism for eccentric rotating body

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4957771U (en) * 1972-09-04 1974-05-21
JPS5174683U (en) * 1974-12-11 1976-06-11
JPH0583507U (en) * 1992-04-16 1993-11-12 石山 文鎔 Drive mechanism for eccentric rotating body

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010038323A (en) * 2008-08-07 2010-02-18 Honda Motor Co Ltd Motor with reduction gear
JP2011011706A (en) * 2009-07-06 2011-01-20 Mazda Motor Corp Drive unit for hybrid vehicle
KR20170000349A (en) * 2015-06-23 2017-01-02 가부시끼가이샤 산쿄 세이사쿠쇼 A power transmission apparatus with an inscribed cam and cylinderical pinions
JP2017009041A (en) * 2015-06-23 2017-01-12 株式会社三共製作所 Power transmission device with inner contact cam and cylindrical pinion
TWI694217B (en) * 2015-06-23 2020-05-21 日商三共製作所股份有限公司 A power transmission apparatus with an inscribed cam and cylinderical pinions
KR102526572B1 (en) * 2015-06-23 2023-04-28 가부시끼가이샤 산쿄 세이사쿠쇼 A power transmission apparatus with an inscribed cam and cylinderical pinions

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