JP2007239792A - Rotary coupling - Google Patents

Rotary coupling Download PDF

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JP2007239792A
JP2007239792A JP2006059818A JP2006059818A JP2007239792A JP 2007239792 A JP2007239792 A JP 2007239792A JP 2006059818 A JP2006059818 A JP 2006059818A JP 2006059818 A JP2006059818 A JP 2006059818A JP 2007239792 A JP2007239792 A JP 2007239792A
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apex
yoke
curve
pitch cone
rotary shaft
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JP4554540B2 (en
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Isao Nemoto
功 根本
Kenji Watanabe
賢治 渡邉
Hirosuke Abe
裕輔 阿部
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Nemoto Kikaku Kogyo KK
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Nemoto Kikaku Kogyo KK
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Abstract

<P>PROBLEM TO BE SOLVED: To eliminate rotation irregularity in a rotary coupling, and to reduce vibration and noise. <P>SOLUTION: A developed profile in a circumference direction of an outer circumference part 31 is formed with a periodic wave form curve, an inner surface is formed by a spiral curved track connecting a point on the curve and a top part of a pitch corn, a yoke 3A having a spherical recession 35 on the top part of the pitch corn is attached to an input shaft and an output shaft, and a spherical body 5 is inserted into the recession 35, and thus, the rotary coupling is constituted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、入力軸と出力軸とが１点においてある角度で折れ曲がっている場合に使用する回転軸継手に関する。   The present invention relates to a rotary shaft joint used when an input shaft and an output shaft are bent at an angle at one point.

入力軸と出力軸とが１点においてある角度で折れ曲がっている場合に使用する回転軸継手、いわゆる自在継手としてはフックの継手が知られているが、構成部品点数が多いなどの問題点がある。かさ歯車も同じ目的に使用できるが、歯車であるから複雑な機械加工を必要とし、高価であるばかりでなく潤滑が必要であり、振動、騒音を発するという問題点がある。   A rotary shaft joint used when the input shaft and the output shaft are bent at a certain angle at one point, a so-called universal joint, is known as a hook joint, but there are problems such as a large number of components. . A bevel gear can be used for the same purpose, but since it is a gear, it requires complicated machining, is expensive and requires lubrication, and has problems of generating vibration and noise.

特許文献１には、フックの継手やかさ歯車のいずれとも異なる回転軸継手が記載されている。図面によりこれを説明する。
図３は特許文献１に記載の回転軸継手を示す斜視図、図４はその片側のヨークを示す斜視図、図５は図４のＸＸ矢視による断面図で、１は入力軸、２は出力軸、３、４は入力軸１と出力軸２とのそれぞれに取り付けられたヨーク、５は１対のヨーク３、４の間に挿入された球体である。ヨーク３、４は同形であるから、以下片側のヨーク３についてやや詳しく説明する。ヨーク３は、外周部31を円周方向に展開したプロフィルを周期的な波形曲線で形成し、内側の表面32をこの波形曲線上の点とピッチコーンの頂点とを結ぶ直線の軌跡で形成し、ピッチコーンの頂点部分に、この頂点を中心とする球面状の凹部35を形成して構成されている。 Patent Document 1 describes a rotary shaft joint that is different from either a hook joint or a bevel gear. This will be described with reference to the drawings.
3 is a perspective view showing a rotary shaft joint described in Patent Document 1, FIG. 4 is a perspective view showing a yoke on one side thereof, FIG. 5 is a sectional view taken along arrow XX in FIG. 4, 1 is an input shaft, 2 is The output shafts 3, 4 are yokes attached to the input shaft 1 and the output shaft 2, and 5 is a sphere inserted between the pair of yokes 3, 4. Since the yokes 3 and 4 have the same shape, the yoke 3 on one side will be described in some detail below. The yoke 3 has a profile in which the outer peripheral portion 31 is developed in the circumferential direction is formed by a periodic waveform curve, and the inner surface 32 is formed by a linear locus connecting a point on the waveform curve and the apex of the pitch cone. In addition, a spherical concave portion 35 centering on the vertex is formed at the apex portion of the pitch cone.

図６は特許文献１に記載の回転軸継手におけるヨーク３、４をピッチコーンで示した説明図で、入力軸１と出力軸２との折れ曲がり角度をα、ピッチコーンのすそ部の仰角をα／２とし、頂点部分に頂点を中心とする球面状の凹部を形成されたヨーク３、４と、入力軸１と出力軸２との折れ曲がり点を中心とする球体５とで構成され、入力軸１と出力軸２との折れ曲がりの内側位置において、ピッチコーンの内側の表面が接触している。   FIG. 6 is an explanatory view showing the yokes 3 and 4 in the rotary shaft joint described in Patent Document 1 as pitch cones, where the bending angle between the input shaft 1 and the output shaft 2 is α, and the elevation angle of the skirt portion of the pitch cone is α. / 2, and is composed of yokes 3 and 4 in which a spherical concave portion centered on the apex is formed at the apex portion, and a sphere 5 centering on a bending point between the input shaft 1 and the output shaft 2. The inner surface of the pitch cone is in contact with the inner position of the bend between the output shaft 2 and the output shaft 2.

ヨークが理想的な摩擦体であれば図６の構成のままで摩擦接触によりトルクを伝達することができるが、現実の材料では滑りや摩耗が避けられず、高速で大トルクを伝達することはできない。ピッチコーンに凹凸を設けてかさ歯車とすれば確実にトルクを伝達することができるが、騒音や振動が発生し、また潤滑、摩耗などのメンテナンス上の問題もある。   If the yoke is an ideal friction body, torque can be transmitted by frictional contact with the configuration of FIG. 6, but slipping and wear cannot be avoided with actual materials, and large torque can be transmitted at high speed. Can not. Torque can be transmitted reliably if the pitch cone is provided with irregularities on the pitch cone, but noise and vibration are generated, and there are also maintenance problems such as lubrication and wear.

特許文献１に記載の発明ではかさ歯車に代えて、展開したプロフィルを波形曲線とするヨークとし、この波形曲線を全周で２ないし４サイクルの少ない波数で構成している。さらに転動に際して滑りを生じないように、波形曲線の山の部分と谷の部分とをそれぞれサイクロイド曲線で構成した。
図７にヨーク外周部31の展開プロフィルの一例を示す。全周は山数２つの２サイクルで構成され、山の部分と谷の部分とはそれぞれサイクロイド曲線で、継目部分を滑らかな曲線で接続している。 In the invention described in Patent Document 1, instead of the bevel gear, the developed profile is a yoke having a waveform curve, and this waveform curve is configured with a small wave number of 2 to 4 cycles on the entire circumference. Furthermore, the peak portion and the valley portion of the waveform curve were each composed of a cycloid curve so that no slip occurred during rolling.
FIG. 7 shows an example of a development profile of the yoke outer peripheral portion 31. The entire circumference is composed of two cycles with two peaks. The peak portion and the valley portion are each connected by a cycloid curve, and the joint portion is connected by a smooth curve.

サイクロイド曲線は、円が直線に沿って滑らずに転がるとき、円周上の定点が描く軌跡である。歯車のプロフィルとして一般的なインボリュート曲線は歯面の表裏で不連続であるが、サイクロイドの場合は頂部を含めて両側が連続した波形となり、少ない山数で連続的に接触したい本発明の継手には好適である。波形曲線としてはこの他に、変形台形曲線、変形正弦曲線、トロコイド曲線など、一般にカム曲線と呼ばれているものが使用できる。   The cycloid curve is a locus drawn by a fixed point on the circumference when the circle rolls without sliding along the straight line. A general involute curve as a gear profile is discontinuous on the front and back of the tooth surface, but in the case of a cycloid, both sides including the top have a continuous waveform, and the joint of the present invention where continuous contact is desired with a small number of peaks. Is preferred. In addition to this, what is generally called a cam curve, such as a modified trapezoidal curve, a modified sine curve, or a trochoid curve, can be used as the waveform curve.

波形曲線の全周の中のサイクル数、すなわち山数を多くするとヨークは実質的にかさ歯車に近いものとなるが、特許文献１に記載の発明ではあえて山数を少なくし、製作を容易にするとともに強度を向上させている。図３ないし５に示した例では山数は２で、図７もこれに対応している。山数が１では互いにかみ合う形にならないので、現実的でない。山数が多くなると山の幅が小さくなって強度が低下するから、多くしても６山程度が限度であり、例示した２山がもっとも望ましい。   Increasing the number of cycles, i.e., the number of peaks, in the entire circumference of the waveform curve makes the yoke substantially similar to a bevel gear, but the invention described in Patent Document 1 dares to reduce the number of peaks and facilitates manufacture. In addition, the strength is improved. In the example shown in FIGS. 3 to 5, the number of peaks is 2, and FIG. 7 corresponds to this. If the number of mountains is 1, it will not be in mesh with each other, so it is not realistic. As the number of mountains increases, the width of the mountains decreases and the strength decreases, so the maximum is about 6 mountains, and the two mountains illustrated are the most desirable.

特許文献１に記載の発明の軸継手は、１対のヨーク３、４の中間に球体５を介在させることにより、軸方向の力の伝達ならびにコーンの位置合わせを確実なものとしている。トルクの伝達はヨークの内側表面のころがり接触により行われる。サイクロイド曲線等の波形曲線を採用することによりほぼ完全なころがり接触となるので摩耗の問題はほとんどないが、潤滑を行わないでも長時間安全に運転するため、ヨークそのものを自己潤滑作用のある低摩擦材製とすることが望ましい。一方、球体は軸受用鋼球やセラミックボール等の硬いものが適当である。   In the shaft coupling of the invention described in Patent Document 1, a spherical body 5 is interposed between a pair of yokes 3 and 4 to ensure transmission of axial force and alignment of the cone. Torque is transmitted by rolling contact on the inner surface of the yoke. By adopting a waveform curve such as a cycloid curve, there is almost no problem of wear because it becomes almost perfect rolling contact, but since it operates safely for a long time without lubrication, the yoke itself has low friction with self-lubricating action It is desirable to use a material. On the other hand, hard balls such as steel balls for bearings and ceramic balls are suitable.

また、ヨーク３、４を射出成形で製造する場合などには、一方のヨーク３を、凹部33に球体５を嵌合した形にして一体に形成し、部品点数を削減することもできる。
特開２００５−１６３５９３号公報 Further, when the yokes 3 and 4 are manufactured by injection molding, one yoke 3 can be integrally formed by fitting the spherical body 5 into the concave portion 33 to reduce the number of parts.
JP 2005-163593 A

特許文献１に記載の回転軸継手によって回転を伝達することができるが、山数が少ないことに起因して回転むらや振動、騒音が多少発生しており、用途によってはこれが問題となる。本発明は、特許文献１に記載の回転軸継手をさらに改良して、回転むらをなくし、騒音や振動を低減するとともに強度を向上させることを目的とする。   Although the rotation can be transmitted by the rotary shaft joint described in Patent Document 1, rotation unevenness, vibration, and noise are somewhat generated due to the small number of peaks, which may be a problem depending on the application. An object of the present invention is to further improve the rotary shaft joint described in Patent Document 1 to eliminate uneven rotation, to reduce noise and vibration, and to improve strength.

本発明は、入力軸と出力軸とが１点において角度αで折れ曲がっている回転軸継手であって、前記入力軸と出力軸とのそれぞれに、ピッチコーンのすそ部の仰角がα／２で、外周部を円周方向に展開したプロフィルが周期的な波形曲線で形成されるとともに、その内側の表面がこの曲線上の点とピッチコーンの頂点とを結ぶ渦巻き状の曲線の軌跡で形成され、ピッチコーンの頂点部分に、この頂点を中心とする球面状の凹部を形成したヨークが取り付けられ、それぞれのヨークが、折れ曲がりの内側位置において内側表面同士が接触するとともに、前記凹部に嵌合する１個の球体を介して軸方向に接続されていることを特徴とする回転軸継手であるか、あるいは、入力軸と出力軸とが１点において角度αで折れ曲がっている回転軸継手であって、前記入力軸と出力軸とのそれぞれに、ピッチコーンのすそ部の仰角がα／２で、外周部と内周部との２重構造で、それぞれが円周方向に展開したプロフィルが同じ周期の波形曲線で形成されるとともに、それぞれの内側の表面がこの曲線上の点とピッチコーンの頂点とを結ぶ直線の軌跡で形成され、外周部と内周部とで位相が90度ずれているピッチコーンの頂点部分に、この頂点を中心とする球面状の凹部を形成したヨークが取り付けられ、それぞれのヨークが、折れ曲がりの内側位置においてそれぞれの内側の表面同士が接触するとともに、前記凹部に嵌合する１個の球体を介して軸方向に接続されていることを特徴とする回転軸継手であり、望ましくは前記の球体が前記ヨークの一方と凹部に嵌合した形で一体に形成されている前記の回転軸継手であるか、また前記の周期的な波形曲線が全周を少ないサイクル数で構成されている前記の回転軸継手である。   The present invention is a rotary shaft joint in which an input shaft and an output shaft are bent at an angle α at one point, and an elevation angle of a base portion of a pitch cone is α / 2 on each of the input shaft and the output shaft. The profile of the outer circumference developed in the circumferential direction is formed with a periodic waveform curve, and the inner surface is formed with a spiral curve trajectory connecting the point on this curve and the apex of the pitch cone. A yoke having a spherical recess centered on the apex is attached to the apex portion of the pitch cone, and the inner surfaces of the yokes are in contact with each other at the inner position of the bend and are fitted into the recess. It is a rotary shaft joint characterized in that it is connected in the axial direction via one sphere, or a rotary shaft joint in which the input shaft and the output shaft are bent at an angle α at one point. In each of the input shaft and the output shaft, the pitch cone has an elevation angle of α / 2, a double structure of an outer peripheral portion and an inner peripheral portion, and each profile developed in the circumferential direction has the same period. A pitch that is formed by a waveform curve, and each inner surface is formed by a straight locus connecting a point on the curve and the apex of the pitch cone, and the phase is shifted by 90 degrees between the outer peripheral portion and the inner peripheral portion. At the apex of the cone, a yoke having a spherical recess centered on this apex is attached, and the respective inner surfaces of the yokes are in contact with each other at the inner position of the bend, and are fitted into the recess. The rotary shaft coupling is connected in the axial direction through a single sphere, and preferably the sphere is integrally formed with one of the yokes fitted into the recess. Said times Either a shaft coupling, also said rotational shaft joint periodic waveform curve of the is composed of the number of cycles less the entire circumference.

本発明によれば、回転軸継手におけるかみ合いが円滑となり、振動や騒音が軽減され、回転機器の小型化等に貢献するという、すぐれた効果を奏する。   According to the present invention, it is possible to smoothly engage the rotary shaft joint, reduce vibrations and noises, and provide excellent effects such as contributing to downsizing of the rotating device.

本発明は、基本的な構成はすでに説明した特許文献１に記載のものと同様、入力軸と出力軸とが１点において角度αで折れ曲がっている回転軸継手であり、入力軸と出力軸とのそれぞれに、ピッチコーンのすそ部の仰角がα／２で、外周部を円周方向に展開したプロフィルが周期的な波形曲線で形成され、ピッチコーンの頂点部分に球面状の凹部を形成したヨークが取り付けられている。以下、実施例について、特許文献１に記載の回転軸継手との相違点を中心に説明する。   The basic configuration of the present invention is a rotary shaft joint in which the input shaft and the output shaft are bent at an angle α at one point, similar to that described in Patent Document 1 described above. Each of the pitch cone has an elevation angle of α / 2 and a profile in which the outer peripheral portion is developed in the circumferential direction is formed by a periodic waveform curve, and a spherical concave portion is formed at the apex portion of the pitch cone. The yoke is attached. Hereinafter, an Example is described centering on difference with the rotating shaft coupling of patent document 1. FIG.

［実施例１］
本発明の第１の実施例を図面により説明する。図１はさきに示した図４と同様、入力軸と出力軸とが１点においてある角度で折れ曲がっている回転軸継手における片側のヨーク3Aを示す斜視図である。
ヨーク3Aは、外周部31を円周方向に展開したプロフィルが周期的な波形曲線で形成されるとともに、その内側の表面がこの曲線上の点とピッチコーンの頂点とを結ぶ渦巻き状の曲線の軌跡で形成され、ピッチコーンの頂点部分に、この頂点を中心とする球面状の凹部35が形成されている。 [Example 1]
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a yoke 3A on one side of a rotary shaft joint in which the input shaft and the output shaft are bent at an angle at one point, as in FIG. 4 shown above.
In the yoke 3A, a profile in which the outer peripheral portion 31 is developed in the circumferential direction is formed by a periodic waveform curve, and the inner surface of the yoke 3A has a spiral curve connecting the point on this curve and the apex of the pitch cone. A spherical concave portion 35 is formed at the apex portion of the pitch cone.

図４に示した従来のヨーク３に対して、本実施例のヨーク3Aは、かみ合いの接触のタイミングが内周寄りと外周寄りとでずれることにより、回転むらが少なくなり、振動や騒音が軽減される。
［実施例２］
図２は本発明の第２の実施例の片側のヨーク3Bを示す斜視図である。 Compared to the conventional yoke 3 shown in FIG. 4, the yoke 3A of the present embodiment is less in rotation unevenness due to the contact timing of the meshing being shifted toward the inner periphery and the outer periphery, thereby reducing vibration and noise. Is done.
[Example 2]
FIG. 2 is a perspective view showing a yoke 3B on one side of the second embodiment of the present invention.

ヨーク3Bは、基本的にはこれまでのものと同様であるが、外周部31と内周部33との２重構造となっており、それぞれが円周方向に展開したプロフィルは同じ周期の波形曲線で形成されるとともに、それぞれの内側の表面32、34がこの曲線上の点とピッチコーンの頂点とを結ぶ直線の軌跡で形成され、外周部31と内周部33とで位相が90度ずれている。
外周部31と内周部33とが２重構造でかつ位相が90度ずれていることにより、波形曲線は全周で２山（２サイクル）であるが、かみ合いのタイミングは倍の４山と同じになり、回転むらが少なくなり、振動や騒音が軽減される。 The yoke 3B is basically the same as the conventional one, but has a double structure of the outer peripheral portion 31 and the inner peripheral portion 33, and the profile developed in the circumferential direction has a waveform with the same period. Each of the inner surfaces 32 and 34 is formed by a curved line connecting a point on the curve and the apex of the pitch cone, and the phase is 90 degrees between the outer peripheral portion 31 and the inner peripheral portion 33. It's off.
Since the outer peripheral portion 31 and the inner peripheral portion 33 have a double structure and the phase is shifted by 90 degrees, the waveform curve has two ridges (two cycles) on the entire circumference, but the timing of the meshing is double ridges. It becomes the same, the rotation unevenness is reduced, and vibration and noise are reduced.

以上いずれの実施例においても、球体５を一方のヨーク3A、3Bの凹部35に嵌合した形で一体に形成してもよい。また、球面状の凹部に代えて、球体５の直径にほぼ等しい径の孔をあけ、外側から凹部の底部に相当する位置までこの孔径に等しいピンを打ち込んでこの孔をふさぐようにしてもよい。
本発明においては表面形状を渦巻き状としたり、内外２重構造とすることにより回転むらを軽減しているから、基本的な波形曲線としてはサイクル数を増加させる必要がないので、全周を少ないサイクル数、たとえば２サイクルで構成することができる。 In any of the embodiments described above, the spherical body 5 may be integrally formed in a form in which the spherical body 5 is fitted in the concave portion 35 of one of the yokes 3A and 3B. Further, instead of the spherical concave portion, a hole having a diameter substantially equal to the diameter of the sphere 5 may be formed, and a pin having the same diameter as that of the bottom portion of the concave portion may be driven from outside to close the hole. .
In the present invention, since the surface shape is spiral or the inner and outer double structures are used to reduce rotational unevenness, there is no need to increase the number of cycles as a basic waveform curve. It can be constituted by the number of cycles, for example, 2 cycles.

本発明の回転軸継手は歯車等に比べて形状が単純であるから小型化に有利であり、射出成形法やロスとワックス法等によって外径10ｍｍ程度の小さいものも製作できる。また材質はアルミニウム等の金属、樹脂、セラミックスなど自由に選択できる。したがって小型、軽量を要求される特許文献１に記載された人工心臓用の揺動板ポンプなどにも使用できる。なお、このようなポンプに使用する場合、本発明の軸継手自身は回転しないが、機構的には回転する継手と何ら区別するところはない。   Since the rotary shaft joint of the present invention is simpler in shape than a gear or the like, it is advantageous for downsizing, and a small one having an outer diameter of about 10 mm can be manufactured by an injection molding method, a loss and wax method or the like. The material can be freely selected from metals such as aluminum, resin, ceramics and the like. Therefore, it can also be used for an oscillating plate pump for an artificial heart described in Patent Document 1, which is required to be small and light. When used in such a pump, the shaft coupling of the present invention itself does not rotate, but there is no point to distinguish it from a rotating coupling mechanically.

本発明の第1の実施例の回転軸継手の片側のコーンを示す斜視図である。FIG. 3 is a perspective view showing a cone on one side of the rotary shaft joint according to the first embodiment of the present invention. 本発明の第２の実施例の回転軸継手の片側のコーンを示す斜視図である。It is a perspective view which shows the cone of the one side of the rotating shaft coupling of 2nd Example of this invention. 従来技術の回転軸継手を示す斜視図である。It is a perspective view which shows the rotating shaft coupling of a prior art. 従来技術の回転軸継手の片側のヨークを示す斜視図である。It is a perspective view which shows the yoke of the one side of the rotating shaft coupling of a prior art. 図4のＸＸ矢視による断面図である。FIG. 5 is a cross-sectional view taken along arrow XX in FIG. 4. 従来技術の回転軸継手におけるヨークをピッチコーンで示した説明図である。It is explanatory drawing which showed the yoke in the rotating shaft coupling of a prior art with the pitch cone. 従来技術の回転軸継手におけるヨーク外周部のプロフィルを示す展開図である。It is an expanded view which shows the profile of the yoke outer periphery part in the rotating shaft coupling of a prior art.

符号の説明Explanation of symbols

１ 入力軸
２ 出力軸
３、４、3A、3B ヨーク
５ 球体
31 外周部
32 （外周部内側の）表面
33 内周部
34 （内周部内側の）表面
35 凹部 1 Input shaft 2 Output shaft 3, 4, 3A, 3B Yoke 5 Sphere
31 Outer part
32 Surface (inside the outer periphery)
33 Inner circumference
34 Surface (inside the inner circumference)
35 recess

Claims (4)

入力軸（１）と出力軸（２）とが１点において角度αで折れ曲がっている回転軸継手であって、前記入力軸（１）と出力軸（２）とのそれぞれに、ピッチコーンのすそ部の仰角がα／２で、外周部（31）を円周方向に展開したプロフィルが周期的な波形曲線で形成されるとともに、その内側の表面がこの曲線上の点とピッチコーンの頂点とを結ぶ渦巻き状の曲線の軌跡で形成され、ピッチコーンの頂点部分に、この頂点を中心とする球面状の凹部（35）を形成したヨーク（3A）が取り付けられ、それぞれのヨーク（3A）が、折れ曲がりの内側位置において内側表面（32）同士が接触するとともに、前記凹部（33）に嵌合する１個の球体（５）を介して軸方向に接続されていることを特徴とする回転軸継手。   A rotary shaft joint in which an input shaft (1) and an output shaft (2) are bent at an angle α at one point, and a pitch cone skirt is provided on each of the input shaft (1) and the output shaft (2). The elevation angle of the part is α / 2 and the profile of the outer peripheral part (31) developed in the circumferential direction is formed by a periodic waveform curve, and the inner surface is a point on this curve and the apex of the pitch cone. A yoke (3A) with a spherical recess (35) centered on this apex is attached to the apex of the pitch cone, and the yoke (3A) is attached to the apex of the pitch cone. The rotating shaft is characterized in that the inner surfaces (32) are in contact with each other at the inner position of the bend, and are connected in the axial direction via one sphere (5) fitted into the recess (33). Fittings. 入力軸（１）と出力軸（２）とが１点において角度αで折れ曲がっている回転軸継手であって、前記入力軸（１）と出力軸（２）とのそれぞれに、ピッチコーンのすそ部の仰角がα／２で、外周部（31）と内周部（33）との２重構造で、それぞれが円周方向に展開したプロフィルが同じ周期の波形曲線で形成されるとともに、それぞれの内側の表面（32、34）がこの曲線上の点とピッチコーンの頂点とを結ぶ直線の軌跡で形成され、外周部（31）と内周部（33）とで位相が90度ずれているピッチコーンの頂点部分に、この頂点を中心とする球面状の凹部（35）を形成したヨーク（3B）が取り付けられ、それぞれのヨーク（3B）が、折れ曲がりの内側位置においてそれぞれの内側の表面（32、34）同士が接触するとともに、前記凹部（35）に嵌合する１個の球体（５）を介して軸方向に接続されていることを特徴とする回転軸継手。   A rotary shaft joint in which an input shaft (1) and an output shaft (2) are bent at an angle α at one point, and a pitch cone skirt is provided on each of the input shaft (1) and the output shaft (2). The elevation angle of the part is α / 2, with a double structure of the outer peripheral part (31) and the inner peripheral part (33), each of the profiles developed in the circumferential direction is formed with a waveform curve of the same period, The inner surface (32, 34) is formed by a linear trajectory connecting the point on this curve and the apex of the pitch cone, and the phase is shifted 90 degrees between the outer periphery (31) and the inner periphery (33). A yoke (3B) having a spherical recess (35) centered on this apex is attached to the apex portion of the pitch cone, and each yoke (3B) has its inner surface at the inner position of the bend. (32, 34) are in contact with each other and fitted into the recess (35) Rotary shaft coupling, characterized in that through the spherical body (5) is connected in the axial direction. 前記の球体（５）が前記ヨーク（3A、3B）の一方と凹部（35）に嵌合した形で一体に形成されている請求項１または２に記載の回転軸継手。   The rotary shaft coupling according to claim 1 or 2, wherein the spherical body (5) is integrally formed so as to be fitted to one of the yokes (3A, 3B) and the recess (35). 前記の周期的な波形曲線が全周を少ないサイクル数で構成されている請求項１ないし３のいずれかに記載の回転軸継手。   The rotary shaft coupling according to any one of claims 1 to 3, wherein the periodic waveform curve is configured with a small number of cycles around the entire circumference.
JP2006059818A 2006-03-06 2006-03-06 Rotary shaft coupling Expired - Fee Related JP4554540B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013514861A (en) * 2009-12-22 2013-05-02 インテュイティブ サージカル オペレーションズ， インコーポレイテッド Equipment wrist with cycloid surface

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027306A (en) * 1999-07-13 2001-01-30 Mitsubishi Materials Corp Bevel gear
JP2005163593A (en) * 2003-12-01 2005-06-23 Nemoto Kikaku Kogyo Kk Rotary coupling and oscillating plate pump using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027306A (en) * 1999-07-13 2001-01-30 Mitsubishi Materials Corp Bevel gear
JP2005163593A (en) * 2003-12-01 2005-06-23 Nemoto Kikaku Kogyo Kk Rotary coupling and oscillating plate pump using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013514861A (en) * 2009-12-22 2013-05-02 インテュイティブ サージカル オペレーションズ， インコーポレイテッド Equipment wrist with cycloid surface
US8887595B2 (en) 2009-12-22 2014-11-18 Intuitive Surgical Operations, Inc. Instrument wrist with cycloidal surfaces
KR101727724B1 (en) 2009-12-22 2017-04-18 인튜어티브 서지컬 오퍼레이션즈 인코포레이티드 Instrument wrist with cycloidal surfaces

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