JPH05168222A - Method of preventing excessive torque and its preventive device - Google Patents
Method of preventing excessive torque and its preventive deviceInfo
- Publication number
- JPH05168222A JPH05168222A JP33502791A JP33502791A JPH05168222A JP H05168222 A JPH05168222 A JP H05168222A JP 33502791 A JP33502791 A JP 33502791A JP 33502791 A JP33502791 A JP 33502791A JP H05168222 A JPH05168222 A JP H05168222A
- Authority
- JP
- Japan
- Prior art keywords
- magnets
- torque
- magnetic poles
- fixed
- excessive torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、駆動軸と被動軸とを軸
継手機構によって接続して伝動する場合、過大トルクが
掛かったとき伝動を遮断して破損を未然に防ぐための、
いわゆるトルクリミッタ機構に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in the case where a drive shaft and a driven shaft are connected by a shaft coupling mechanism for transmission, to prevent the damage by cutting off the transmission when an excessive torque is applied,
The present invention relates to a so-called torque limiter mechanism.
【０００２】[0002]
【従来の技術】例えばモータによってゴミ破砕機を駆動
して運転する場合、ゴミの中に混入している岩塊や鋼材
を噛み込んで、破砕機の刃が欠けたりモータが焼損した
りするトラブルが多い。このような不具合を防止するた
め、モータと破砕機の回転軸との間にトルクリミッタが
介装される。トルクリミッタは一般に摩擦板タイプのも
のが用いられ、その１例として株式会社椿本チェイン製
のカップリングタイプＴＬ２００１ＬＣが市販されてい
る。この種の摩擦板タイプのトルクリミッタは摩擦クラ
ッチに類似した構造であって、設定トルク以上のトルク
が掛かると滑るようになっている。そして、調節ナット
を回して摩擦面の加圧力を加減すると、滑りを発生する
トルクが変化する。2. Description of the Related Art For example, when a dust crusher is driven by a motor for operation, a rock mass or a steel material mixed in the dust is caught, and the blade of the crusher is chipped or the motor is burned. There are many. In order to prevent such a problem, a torque limiter is provided between the motor and the rotary shaft of the crusher. A friction plate type is generally used as the torque limiter, and as an example, a coupling type TL2001LC manufactured by Tsubakimoto Chain Co., Ltd. is commercially available. This type of friction plate type torque limiter has a structure similar to that of a friction clutch and slips when a torque equal to or greater than a set torque is applied. Then, when the adjusting nut is turned to increase or decrease the pressure applied to the friction surface, the torque that causes slipping changes.
【０００３】[0003]
【発明が解決しようとする課題】前記の摩擦板タイプの
トルクリミッタは、滑りを発生するトルクの調節が難し
くて、その上、調節した状態が不安定で設定トルクが変
動し易い。摩擦力は摩擦係数と圧力とによって決まる
が、摩擦係数は温度，湿度，汚損などによって変化し、
その上、摩耗の進行や摩擦板材料の熱変質によって変化
する。また、加圧力は関連部材の熱膨張収縮やスプリン
グのヘタリによって変化する。さらに、摩擦板タイプの
トルクリミッタが滑り作動をすると摩擦熱を発生するの
で、滑り状態が永続すると焼損して、当該トルクリミッ
タのみでなく周辺の部材までが損耗する。また、摩擦板
タイプのトルクリミッタの摩擦板ライニングはアスベス
トを用いているため、粉塵が発生するとアスベスト公害
の原因となる。こうした不具合を防止するために、非ア
スベスト系の摩擦板ライニングを用いたトルクリミッタ
も紹介されているが耐摩耗性が劣る。上記の摩擦板タイ
プと異なる公知例としてヒステリシス形磁気カップリン
グが有る。この種の磁気カップリングはヒステリシス電
動機と同様の原理で一定トルクの伝動を行うのでトルク
リミッタとしての機能を果たさせることもできるが、伝
動時に駆動軸と被動軸との間に滑りを生じることが不可
避である。この滑りは、ヒステリシス現象によってトル
クを発生させるという原理から本質的に存在しており、
この滑りを防止することはできない。本発明は上述の事
情に鑑みて為されたもので、正確に所定トルク以上で滑
り状態となって伝動が遮断され、滑り状態でも摩耗を生
じることが無く耐久性に優れ、滑り状態で摩擦熱を発生
することなく、しかも、所定トルク未満のトルクを伝達
する際は滑りを生じない、簡単な構成で、公害を生じる
虞れも無い、過大トルクの防止方法、および同装置を提
供することを目的とする。In the above friction plate type torque limiter, it is difficult to adjust the torque that causes slippage, and the adjusted state is unstable and the set torque is likely to change. The frictional force is determined by the friction coefficient and the pressure, but the friction coefficient changes with temperature, humidity, pollution, etc.
Moreover, it changes depending on the progress of wear and thermal deterioration of the friction plate material. In addition, the applied pressure changes due to thermal expansion and contraction of related members and fatigue of the spring. Further, when the friction plate type torque limiter performs a sliding operation, frictional heat is generated. Therefore, if the sliding state lasts for a long time, it burns out and not only the torque limiter but also surrounding members are worn. Further, since the friction plate lining of the friction plate type torque limiter uses asbestos, dust generation causes asbestos pollution. In order to prevent such a problem, a torque limiter using a non-asbestos friction plate lining has been introduced, but it has poor wear resistance. As a known example different from the above friction plate type, there is a hysteresis type magnetic coupling. This type of magnetic coupling can perform a function as a torque limiter because it transmits a constant torque according to the same principle as a hysteresis motor, but slippage occurs between the drive shaft and driven shaft during transmission. Is unavoidable. This slip exists essentially from the principle that torque is generated by the hysteresis phenomenon.
This slip cannot be prevented. The present invention has been made in view of the above-mentioned circumstances, and it accurately shifts to a predetermined torque or more in a slipping state to cut off transmission, does not cause wear even in a sliding state and has excellent durability, and frictional heat in a sliding state. (EN) It is possible to provide a method for preventing excessive torque and a device for preventing excessive torque, which does not cause slippage when transmitting torque less than a predetermined torque, has a simple structure, and does not cause pollution. To aim.
【０００４】[0004]
【課題を解決するための手段】上記の目的を達成するた
めに創作した本発明に係る過大トルクの防止方法は、同
心状に配置された駆動軸と被動軸とを連結し、かつ、過
大なトルクの伝動を防止する方法において、同心状に配
置された双方の軸の何れか一方について、その軸心に垂
直な面を想定するとともに、上記垂直面上に軸心と同心
の円を想定し、上記仮想の円に沿って磁極を位置せしめ
るように多数の磁石を配置し、上記多数の磁石を前記双
方の軸の何れか一方に対して固定的に支持するととも
に、上記多数の磁極のそれぞれに対向せしめて異性の磁
極を位置せしめるように、前記と異なる多数の磁石を配
置してこれら多数の磁石を前記双方の軸の何れか他方に
対して固定的に支承し、かつ、前記仮想の円に沿って位
置せしめた多数の磁極を、円周方向について交互に極性
の異なる磁極とすることを特徴とする。A method for preventing excessive torque according to the present invention, which was created to achieve the above object, connects a drive shaft and a driven shaft that are concentrically arranged, and In the method of preventing torque transmission, one of both concentrically arranged shafts is assumed to be a plane perpendicular to the axis, and a circle concentric with the axis is assumed on the vertical plane. , Arranging a large number of magnets so as to position the magnetic poles along the imaginary circle, and fixedly supporting the large number of magnets on either one of the two shafts, and A number of magnets different from the above are arranged so as to position the opposite magnetic poles so as to face each other, and the plurality of magnets are fixedly supported on either of the two shafts, and the virtual A large number of magnets located along a circle And characterized by a polarity different magnetic poles alternately in the circumferential direction.
【０００５】また、上記の発明方法を実施するために創
作した過大トルクの防止装置の構成は、同心状に配置さ
れた駆動軸と被動軸とを連結して伝動する軸継手機構に
おいて、前記の駆動軸に対して垂直に固定された駆動板
と、上記駆動板に対向離間するごとく前記被動軸に対し
て垂直に固定された被動板とを具備しており、上記の駆
動板が被動板に対向している面に、前記駆動軸の軸心を
中心とする円周に沿って多数の磁石が配列，固着されて
おり、前記の被動板には、上記多数の磁石のそれぞれに
対向，離間せしめて、上記と異なる多数の磁石が配列，
固着されており、かつ、前記駆動板に配列固着された多
数の磁石の磁極、並びに前記被動板に配列固着された多
数の磁石の磁極は、それぞれ、円周方向について交互に
極性を異にしていることを特徴とする。Further, the structure of the excessive torque preventing device created for carrying out the above-mentioned method of the invention is the same as that of the above-mentioned structure in the shaft coupling mechanism for connecting and transmitting the drive shaft and the driven shaft arranged concentrically. A drive plate fixed perpendicularly to the drive shaft, and a driven plate fixed perpendicularly to the driven shaft so as to face and separate from the drive plate, wherein the drive plate is a driven plate. A large number of magnets are arranged and fixed along the circumference centered on the axis of the drive shaft on the facing surfaces, and the driven plate faces and separates from the large number of magnets, respectively. At the very least, many magnets different from the above are arranged,
The magnetic poles of a large number of magnets that are fixed and arranged and fixed to the drive plate, and the magnetic poles of a large number of magnets that are arranged and fixed to the driven plate respectively have different polarities in the circumferential direction. It is characterized by being
【０００６】[0006]
【作用】上記の装置を用いて前記の方法を実施すると、
駆動軸に対して固定された磁極と被動軸に固定された磁
極との間に働く磁気力によって伝動されるので、所定ト
ルク未満では滑りを生じない。特に、磁極の配列が円周
方向に交互に異性磁極になっているので、滑ろうとした
とき、異性磁極間の吸引力のみでなく同性磁極間の反撥
力が作用して大きいトルクの伝達を可能にする。しか
も、大きいトルクを伝達する場合も最高回転速度をトル
クによって制約されることがない（これは、トルクと回
転速度の積に比例した摩擦熱を生じないからである）。
また、所定トルクを越えて滑り状態となっても、駆動側
の部材と被動側の部材とが機械的に接触していないので
摩擦熱を発生しない、また、同様の理由によって摩耗も
生じない。従って当然に、アスベスト粉塵による公害を
生じることもない。When the above method is carried out using the above apparatus,
Since it is transmitted by the magnetic force acting between the magnetic pole fixed to the drive shaft and the magnetic pole fixed to the driven shaft, slip does not occur if the torque is less than the predetermined torque. In particular, since the magnetic poles are arranged alternately in the circumferential direction as opposite magnetic poles, when trying to slide, not only the attractive force between the opposite magnetic poles but also the repulsive force between the homogenous magnetic poles acts to enable transmission of a large torque. To Moreover, even when transmitting a large torque, the maximum rotation speed is not restricted by the torque (because frictional heat proportional to the product of the torque and the rotation speed is not generated).
Further, even if the sliding state exceeds the predetermined torque, frictional heat is not generated because the driving side member and the driven side member are not in mechanical contact with each other, and wear is not generated for the same reason. Therefore, naturally, pollution by asbestos dust does not occur.
【０００７】[0007]
【実施例】図２は、本発明方法を実施するために構成し
た本発明装置の１実施例を示し、模式的に描いた断面図
である。駆動軸１と被動軸２とは軸心Ｘ−Ｘに沿って同
心状に配置されている。上記の駆動軸１に固着した駆動
円板３と、被動軸２に固着した被動円板４とは、面Ａに
沿って対向，離間している。上記の面Ａは、軸Ｘ−Ｘに
対して垂直な仮想の面である。上記仮想の面Ａの上に、
軸Ｘ−Ｘとの交点Ｏを中心とする、直径寸法Ｒの仮想の
円（図示せず）を想定し、上記の円に沿って永久磁石５
を配列して駆動円板３に固着する。本実施例において駆
動円板３および被動円板４は磁性体（低炭素鋼）で作ら
れており、前記の永久磁石５は両面を磁極とする平板状
の、いわゆるボタン形の磁石である。この図２に表され
ている断面においては、上記永久磁石の極性は図に付記
したごとくであるが、その詳細は図１について後述す
る。上記の直径Ｒの円の円周には太さが無く、永久磁石
５の磁極は面積を有している。従って、円に沿って磁極
を配列するとは、ほぼ円周付近に位置せしめる意であ
る。被動円板４には、前記の永久磁石５に対向，離間せ
しめて、ボタン形の永久磁石６を配列、固着する。その
結果、永久磁石６も直径Ｒの円に沿って配列される。図
１は、前記の永久磁石５の配列を示すために描いた駆動
円板３の正面図である。被動円板４上に永久磁石６が配
列されている状態もこれと同様であるが、永久磁石５と
永久磁石６とは、組み立てられた状態で滑っていないと
きは、相互に異種の極性の磁極を対向せしめて吸引し合
っている。図１において、１６個の永久磁石５にそれぞ
れサフィックスを付して、５ａ，５ｂ，５ｃ，〜５ｐと
名付けた。本図に示したように１６個の永久磁石５ａ〜
５ｐの極性は、円周方向に交互に異種の極性となるよう
に配置し、駆動円板３に固着する。上記のように異種極
性の磁極を交互に配列したことの効果について、同種極
性の磁極を配列した場合と比較して、図３を参照しつつ
次に述べる。この図３は、永久磁石を固着した駆動円板
３と被動円板４とについて、その周囲の一部を展開して
描いた模式図である。FIG. 2 is a schematic sectional view showing an embodiment of the apparatus of the present invention constructed to carry out the method of the present invention. The drive shaft 1 and the driven shaft 2 are arranged concentrically along the axis XX. The drive disc 3 fixed to the drive shaft 1 and the driven disc 4 fixed to the driven shaft 2 face each other along the surface A and are separated from each other. The above-mentioned plane A is an imaginary plane perpendicular to the axis XX. On the virtual surface A,
Assuming an imaginary circle (not shown) having a diameter dimension R centered on an intersection O with the axis XX, the permanent magnet 5 is provided along the circle.
Are arranged and fixed to the drive disk 3. In this embodiment, the driving disk 3 and the driven disk 4 are made of a magnetic material (low carbon steel), and the permanent magnet 5 is a flat plate-shaped so-called button-shaped magnet having magnetic poles on both sides. In the cross section shown in FIG. 2, the polarities of the permanent magnets are as shown in the drawing, and details thereof will be described later with reference to FIG. The circumference of the circle having the diameter R has no thickness, and the magnetic poles of the permanent magnet 5 have an area. Therefore, arranging the magnetic poles along the circle means that the magnetic poles are located near the circumference. Button-shaped permanent magnets 6 are arranged and fixed to the driven disk 4 so as to face and be separated from the permanent magnets 5. As a result, the permanent magnets 6 are also arranged along the circle having the diameter R. FIG. 1 is a front view of the drive disk 3 drawn to show the arrangement of the permanent magnets 5 described above. The state in which the permanent magnets 6 are arranged on the driven disk 4 is similar to this, but when the permanent magnets 5 and 6 are not slipped in the assembled state, they have mutually different polarities. The magnetic poles face each other and are attracted to each other. In FIG. 1, 16 permanent magnets 5 are suffixed, respectively, and named as 5a, 5b, 5c, to 5p. As shown in this figure, 16 permanent magnets 5a to
The polarities of 5p are arranged so as to have different polarities alternately in the circumferential direction, and are fixed to the drive disk 3. The effect of alternately arranging the magnetic poles of different polarities as described above will be described below with reference to FIG. 3 as compared with the case of arranging magnetic poles of the same polarity. FIG. 3 is a schematic diagram in which a part of the periphery of the driving disk 3 and the driven disk 4 to which permanent magnets are fixed is developed and drawn.
【０００８】図３（Ａ）は比較のために掲げたもので、
本発明の構成要件を備えておらず、駆動円板３に固着さ
れたボタン形の磁石は総べて（本図では３個のみ描いて
ある）その南極Ｓ1，Ｓ2，Ｓ3を被動円板４に向けてい
る。また、被動円板４に固着されたボタン形の磁石は総
べて、その北極Ｎ1，Ｎ2，Ｎ3を駆動円板３に向けてい
る。このため北極Ｎ1と南極Ｓ1との間、北極Ｎ2と南極
Ｓ2との間、および北極Ｎ3と南極Ｓ3との間にはそれぞ
れ磁気吸引力が作用している。本図３においては、対向
する矢印（→←）によって吸引力を表わすとともに、背
逆する矢印（←→）によって反撥力を表わすことにす
る。FIG. 3A is provided for comparison,
All the button-shaped magnets fixed to the drive disk 3 that do not have the constituent features of the present invention (only three magnets are drawn in this figure) are driven by their south poles S 1 , S 2 , and S 3 . It is facing the disc 4. All the button-shaped magnets fixed to the driven disk 4 have their north poles N 1 , N 2 and N 3 directed toward the driving disk 3. Therefore, magnetic attraction acts between the north pole N 1 and the south pole S 1 , between the north pole N 2 and the south pole S 2, and between the north pole N 3 and the south pole S 3 . In FIG. 3, the opposing arrows (→ ←) represent suction force, and the opposite arrows (← →) represent repulsion force.
【０００９】図３（Ａ）の状態で、被動側（図の左方）
の円板４に負荷の抵抗が掛かって、駆動側（右側）の円
板３が矢印Ｒのごとく回転方向に若干ずれた場合、南極
Ｓ１と北極Ｎ２との間に吸引力（→←）が働き、この吸
引力はずれを助長する方向に作用し、トルク伝達に寄与
しない。このため、図３（Ａ）のような磁極配列では、
トルクリミッタとしての設定トルクが非常に小さくな
り、実用価値が無い。図３（Ｃ）は本発明に係る配列を
模式的に示したもので、円周方向（本図に置いて上下方
向）に、南極Ｓ4，北極Ｎ5，南極Ｓ6というように異性
磁極が交互に並んでいる。これに対向離間して、北極Ｎ
4，南極Ｓ5，北極Ｎ6も交互に並んでいる。この状態か
ら駆動側（右側）が矢印Ｒ方向に若干ずれて同図（Ｄ）
のようになると、南極Ｓ4と南極Ｓ5との間、および南極
Ｓ5と南極Ｓ6との間に磁気反撥力（←→）を生じる。こ
の反撥力はずれを復元させる方向に作用し、トルクの伝
達に寄与する。このようにして、本発明に係る配列（図
３（Ｃ）参照）を用いることにより、トルクリミッタと
して大きい設定トルクが得られる。そして、上記の設定
トルクを越えると被動側（左側））が停止し、駆動側
（右側）が空転して伝動が遮断される。このようにして
空転しているとき、駆動側の構成部材と被動側の構成部
材とは機械的に接触しないので、発熱や摩耗を生じる虞
れが無い。In the state of FIG. 3A, the driven side (left side of the figure)
When a load resistance is applied to the disk 4 of No. 4 and the disk 3 on the drive side (right side) is slightly displaced in the rotation direction as indicated by an arrow R, the attraction force (→ ←) is generated between the south pole S 1 and the north pole N 2. ) Acts, and this suction force acts in the direction of promoting the deviation and does not contribute to torque transmission. Therefore, in the magnetic pole arrangement as shown in FIG.
The set torque as a torque limiter becomes very small, and has no practical value. FIG. 3 (C) schematically shows the arrangement according to the present invention. In the circumferential direction (vertical direction in this figure), the south pole S 4 , the north pole N 5 , and the south pole S 6 are heteropolar magnetic poles. Are lined up alternately. Opposite and away from this, North Pole N
4 , South Pole S 5 and North Pole N 6 are also alternating. From this state, the drive side (right side) is slightly displaced in the direction of arrow R, and is shown in FIG.
Then, magnetic repulsion (← →) is generated between the south pole S 4 and the south pole S 5, and between the south pole S 5 and the south pole S 6 . This repulsive force acts in the direction of restoring the deviation and contributes to the transmission of torque. Thus, by using the arrangement according to the present invention (see FIG. 3C), a large set torque can be obtained as the torque limiter. Then, when the set torque is exceeded, the driven side (left side) stops and the drive side (right side) idles to cut off transmission. When idling in this way, the driving-side constituent member and the driven-side constituent member do not mechanically contact with each other, so there is no risk of heat generation or wear.
【００１０】本発明を実施する場合、磁石の取付位置を
調節し得るように構成して、図１，図２に示した直径Ｒ
の寸法を調節すると、伝達トルクの最大値（滑り始める
トルク値）を調整することができる。In carrying out the present invention, the diameter R shown in FIGS. 1 and 2 is configured so that the mounting position of the magnet can be adjusted.
The maximum value of the transmission torque (the torque value at which slippage starts) can be adjusted by adjusting the dimension of.
【００１１】図４（Ａ）は前記（図２）と異なる実施例
を示す模式的な断面図である。この実施例も原理的には
前記実施例と同様であるが、前記実施例においては駆動
軸１と被動軸２にそれぞれ駆動円板３と被動円板４を固
着したのに比して、本例では駆動円筒７と被動円柱８を
取りつけ、両者を同心状に、開隙を隔てて支持してあ
る。そして、前例（図２）では軸心Ｘ−Ｘに垂直な１個
の仮想面Ａを想定したが、本例では複数の垂直な仮想の
面Ａ1，Ａ2，Ａ3，Ａ4を想定し、それぞれの仮想面上に
軸心Ｘ−Ｘと同心の、直径Ｒ′の円（図示せず）を想定
し、この複数の仮想の円の円周のそれぞれに沿って永久
磁石５を配列するとともに、その極性を円周方向に交互
に異種の極とする。図４（Ｂ）は、前記駆動円筒７の内
周面７ａの展開図であって、この（Ｂ）図において紙面
の上下方向は駆動円筒７の内周面７ａの周方向である。
図示のごとく周方向にＮ，Ｓ，Ｎ，Ｓというように異性
の磁極を配列する。このように構成しても前例（図１，
図２）と同様の作用，効果が得られる。前述した各実施
例における作用，効果のメカニズムから容易に理解でき
るように、本発明を実施する場合に必要なことは、永久
磁石５，６を、駆動軸１，被動軸２に対して所定の位置
に固定的に支承することであって、その支承部材は円
板，円筒，円柱に限られない。（例えば放射状のアーム
であっても良い。また、図４（Ａ）の円柱８に代えて多
角柱（図示せず）を用いることもできる）。図４の実施
例は駆動側の円筒７と被動側の円柱とを組み合わせた構
造であるが、駆動側を円柱状に被動側を円筒状に構成し
ても同様の作用，効果が得られる。この図４に示した実
施例の構造と作用効果との関係から容易に類推し得るよ
うに、円柱８にテーパを付して円錐状とするとともに円
筒の内面をこれに対応せしめて円錐面状に構成すること
も可能である。この場合、図４（Ａ）に示した直径寸法
Ｒ′が一定値とならず、垂直面Ａ1上に想定する仮想の
円の直径は垂直面Ａ2上に想定する仮想の円の直径より
も大きくなり、該垂直面Ａ2上の仮想の円の直径は垂直
面Ａ3上の仮想の円の直径よりも大きく、この垂直面Ａ3
上の仮想円の直径は垂直面Ａ4上の仮想円の直径よりも
大きくなる。FIG. 4A is a schematic sectional view showing an embodiment different from the above (FIG. 2). This embodiment is also similar in principle to the above-described embodiment, but in the above-mentioned embodiment, compared to the case where the drive disk 3 and the driven disk 4 are fixed to the drive shaft 1 and the driven shaft 2, respectively, In the example, a drive cylinder 7 and a driven cylinder 8 are attached, and both are concentrically supported with an opening. In the previous example (FIG. 2), one virtual plane A perpendicular to the axis XX was assumed, but in this example, a plurality of vertical virtual planes A 1 , A 2 , A 3 , and A 4 are assumed. Then, assuming a circle (not shown) having a diameter R ′ and concentric with the axis XX on each virtual plane, the permanent magnets 5 are arranged along the circumference of each of the plurality of virtual circles. At the same time, the polarities of the different poles are alternated in the circumferential direction. FIG. 4B is a development view of the inner peripheral surface 7a of the drive cylinder 7, and in this FIG. 4B, the vertical direction of the drawing is the circumferential direction of the inner peripheral surface 7a of the drive cylinder 7.
As shown, opposite magnetic poles are arranged in the circumferential direction such as N, S, N, S. Even with this configuration, the previous example (Fig. 1,
The same action and effect as in FIG. 2) can be obtained. As can be easily understood from the mechanism of action and effect in each of the above-described embodiments, what is necessary when implementing the present invention is that the permanent magnets 5 and 6 are provided in a predetermined manner with respect to the drive shaft 1 and the driven shaft 2. It is fixedly supported at a position, and the supporting member is not limited to a disc, a cylinder, or a cylinder. (For example, a radial arm may be used, and a polygonal column (not shown) may be used instead of the column 8 in FIG. 4A). Although the embodiment of FIG. 4 has a structure in which the driving side cylinder 7 and the driven side cylinder are combined, the same action and effect can be obtained by forming the driving side into a cylindrical shape and the driven side into a cylindrical shape. As can be easily inferred from the relationship between the structure of the embodiment shown in FIG. 4 and the action and effect, the cylinder 8 is tapered to have a conical shape, and the inner surface of the cylinder is made to correspond to this so as to have a conical shape. It is also possible to configure. In this case, the diameter dimension R ′ shown in FIG. 4 (A) does not have a constant value, and the diameter of the virtual circle assumed on the vertical surface A 1 is smaller than the diameter of the virtual circle assumed on the vertical surface A 2. also increases, the diameter of the imaginary circle on said vertical face a 2 is greater than the diameter of the virtual circle on the vertical plane a 3, the vertical plane a 3
The diameter of the virtual circle on the upper side is larger than the diameter of the virtual circle on the vertical plane A 4 .
【００１２】また、上述の類推から容易に理解し得るよ
うに、前記双方の部材を円錐状に構成する代りに碗状と
することもでき、要するに軸Ｘ−Ｘを中心線とする回転
面に構成すれば良い。Further, as can be easily understood from the above analogy, the both members may be bowl-shaped instead of being conical, and in short, a rotary surface having the axis X--X as a center line may be used. Just configure it.
【００１３】[0013]
【発明の効果】以上に実施例を挙げて説明したように、
本発明の過大トルク防止装置を用いて本発明の過大トル
ク防止方法を実施して、トルクリミッタとして作動させ
ると、正確に設定トルク以上で滑り状態となって伝動が
遮断され、滑り状態で摩耗したり発熱したりすることが
無い。従って耐久性に優れ、アスベスト公害を発生する
虞れが無い。しかも、設定トルク未満のトルクで回転を
伝動しているときに滑りを生じない。その上、大きいト
ルクを受けて滑っている状態で負荷が減少してトルクが
設定トルク未満になると自動的に回転トルクを伝達する
状態に復帰することができる。さらに、高トルクを伝動
しているときも、大きい回転速度で伝動することが可能
である。As described above with reference to the embodiments,
When the excessive torque prevention method of the present invention is carried out by using the excessive torque prevention device of the present invention and is operated as a torque limiter, a slip state is accurately set at or above the set torque, transmission is interrupted, and wear occurs in the slip state. It does not generate heat or heat. Therefore, it has excellent durability and there is no risk of causing asbestos pollution. Moreover, slippage does not occur when the rotation is transmitted with a torque less than the set torque. In addition, when the load is reduced and the torque becomes less than the set torque while the vehicle is receiving a large torque and slipping, it is possible to automatically return to the state of transmitting the rotational torque. Further, even when transmitting high torque, it is possible to transmit at a high rotation speed.
【図１】本発明に係る過大トルク防止装置の１実施例に
おける駆動円板の単品正面図である。FIG. 1 is a front view of a single drive disc in one embodiment of an excessive torque prevention device according to the present invention.
【図２】本発明に係る過大トルク防止装置の１実施例に
おける、軸心を通る面による断面図である。FIG. 2 is a cross-sectional view taken along a plane passing through the axis in one embodiment of the excessive torque prevention device according to the present invention.
【図３】本発明の原理を従来例に比較して説明するため
の、磁石の配列を描いた模式図である。FIG. 3 is a schematic diagram illustrating an arrangement of magnets for explaining the principle of the present invention in comparison with a conventional example.
【図４】前記と異なる実施例を示し、（Ａ）は断面図、
（Ｂ）は磁石配列面の展開図である。FIG. 4 shows an embodiment different from the above, (A) is a sectional view,
(B) is a development view of a magnet array surface.
１…駆動軸、２…被動軸、３…駆動円板、４…被動円
板、５…永久磁石、６…永久磁石、７…駆動円筒、８…
被動円柱。1 ... Drive shaft, 2 ... Drive shaft, 3 ... Drive disc, 4 ... Drive disc, 5 ... Permanent magnet, 6 ... Permanent magnet, 7 ... Drive cylinder, 8 ...
Driven cylinder.
Claims (12)
連結し、かつ、過大なトルクの伝動を防止する方法にお
いて、 同心状に配置された双方の軸の何れか一方について、そ
の軸心に垂直な面を想定するとともに、上記垂直面上に
軸心と同心の円を想定し、 上記仮想の円に沿って磁極を位置せしめるように多数の
磁石を配置し、 上記多数の磁石を前記双方の軸の何れか一方に対して固
定的に支持するとともに、 上記多数の磁極のそれぞれに対向せしめて異性の磁極を
位置せしめるように、前記と異なる多数の磁石を配置し
てこれら多数の磁石を前記双方の軸の何れか他方に対し
て固定的に支承し、 かつ、前記仮想の円に沿って位置せしめた多数の磁極
を、円周方向について交互に極性の異なる磁極とするこ
とを特徴とする、過大トルクの防止方法。1. A method for connecting a drive shaft and a driven shaft, which are arranged concentrically to each other, and preventing transmission of an excessive torque, in which one of the two shafts arranged concentrically is Assuming a plane perpendicular to the axis and a circle concentric with the axis on the vertical plane, arrange a number of magnets so that the magnetic poles are located along the virtual circle, Is fixedly supported on either one of the two shafts, and a large number of magnets different from those described above are arranged so that the opposite magnetic poles are positioned so as to face each of the plurality of magnetic poles. Magnets are fixedly supported on either of the two shafts, and a large number of magnetic poles positioned along the virtual circle are magnetic poles having different polarities alternately in the circumferential direction. The prevention of excessive torque Method.
数の磁石はそれぞれその磁極を前記の軸心と平行な方向
に向けていることを特徴とする、請求項１に記載した過
大トルクの防止方法。2. The number of the vertical planes is 1, and each of the plurality of magnets has its magnetic pole oriented in a direction parallel to the axis. How to prevent excessive torque.
の多数の磁石はそれぞれその磁極を前記の軸心と直交す
る方向に向けていることを特徴とする、請求項１に記載
した過大トルクの防止方法。3. The number of the vertical surfaces is 1 or more, and each of the plurality of magnets has its magnetic pole oriented in a direction orthogonal to the axis. How to prevent excessive torque.
連結して伝動する軸継手機構において、 前記の駆動軸に対して垂直に固定された駆動板と、上記
駆動板に対向離間するごとく前記被動軸に対して垂直に
固定された被動板とを具備しており、 上記の駆動板が被動板に対向している面に、前記駆動軸
の軸心を中心とする円周に沿って多数の磁石が配列，固
着されており、 前記の被動板には、上記多数の磁石のそれぞれに対向，
離間せしめて、上記と異なる多数の磁石が配列，固着さ
れており、 かつ、前記駆動板に配列固着された多数の磁石の磁極、
並びに前記被動板に配列固着された多数の磁石の磁極
は、それぞれ、円周方向について交互に極性を異にして
いることを特徴とする、過大トルクの防止装置。4. A shaft coupling mechanism for connecting and transmitting a drive shaft and a driven shaft, which are arranged concentrically with each other, and a drive plate fixed perpendicularly to the drive shaft, and facing and separated from the drive plate. And a driven plate fixed perpendicularly to the driven shaft, wherein the driving plate has a surface facing the driven plate on a circumference centered on the axis of the driving shaft. A large number of magnets are arrayed along and fixed to each other, and the driven plate faces the plurality of magnets,
A large number of magnets different from the above are arranged and fixed so as to be separated from each other, and magnetic poles of a large number of magnets arranged and fixed to the drive plate,
In addition, the magnetic poles of a large number of magnets arrayed and fixed to the driven plate have different polarities alternately in the circumferential direction, and an excessive torque preventing device is provided.
性体で構成されており、かつ、前記の磁石は両面に磁極
を有する平板状の永久磁石であることを特徴とする、請
求項４に記載した過大トルクの防止装置。5. The drive plate and the driven plate are each made of a magnetic material, and the magnet is a flat permanent magnet having magnetic poles on both sides. Excess torque prevention device described.
連結して伝動する軸継手機構において、 前記双方の軸の何れか一方に対して同心状に固着され
た、円柱面を有する伝動部材と、 前記双方の軸の何れか他方に対して同心状に固着され
て、上記伝動部材の円柱面に対向離間する円筒状内面を
有する伝動部材とを具備しており、 かつ、上記双方の伝動部材が対向している面にはそれぞ
れ、相互に対向離間せしめて、多数の磁石が固定されて
おり、上記多数の磁石は円周方向に配列され、その磁極
の極性が円周方向に交互に異なってすることを特徴とす
る、過大トルクの防止装置。6. A shaft coupling mechanism for coupling and transmitting a drive shaft and a driven shaft, which are arranged concentrically, and has a cylindrical surface concentrically fixed to either one of the both shafts. A transmission member, and a transmission member that is concentrically fixed to the other of the both shafts and has a cylindrical inner surface facing and spaced from the cylindrical surface of the transmission member, and A large number of magnets are fixed to the surfaces of the transmission members facing each other facing each other and spaced apart from each other, and the plurality of magnets are arranged in the circumferential direction, and the polarities of the magnetic poles are set in the circumferential direction. A device for preventing excessive torque, which is characterized by being alternately different.
は、軸心方向に並んだ複数の円周のそれぞれに沿って複
数列に配列されていることを特徴とする、請求項６に記
載した過大トルクの防止装置。7. The plurality of magnets arranged in the circumferential direction are arranged in a plurality of rows along each of the plurality of circumferences arranged in the axial direction. Excessive torque prevention device described in.
び、円筒状内面を有する伝動部材は、それぞれ磁性体で
構成されており、かつ、前記の磁石は両面に磁極を有す
る平板状の磁石であることを特徴とする、請求項６また
は請求項７に記載した過大トルクの防止装置。8. The transmission member having a cylindrical surface and the transmission member having a cylindrical inner surface are each made of a magnetic material, and the magnet is a flat magnet having magnetic poles on both surfaces. The device for preventing excessive torque according to claim 6 or 7, characterized in that it is provided.
連結して伝動する軸継手機構において、 前記双方の軸の何れか一方に対して同心状に固着され
た、回転面よりなる凹曲面を有する伝動部材と、 前記双方の軸の何れか他方に対して同心状に固着され
て、上記伝動部材の凹曲面に対向離間する凸曲面を有す
る伝動部材とを具備しており、 かつ、上記双方の伝動部材が対向している面にはそれぞ
れ、相互に対向離間せしめて多数の磁石が固定されてお
り、上記多数の磁石は円周方向に配列され、その磁極の
極性が円周方向に交互に異なっていることを特徴とす
る、過大トルクの防止装置。9. A shaft coupling mechanism for connecting and transmitting a drive shaft and a driven shaft, which are arranged concentrically, and which comprises a rotating surface fixed concentrically to either one of the both shafts. A transmission member having a concave curved surface; and a transmission member having a convex curved surface that is concentrically fixed to the other of the two shafts and that is opposed to and separated from the concave curved surface of the transmission member, and , A large number of magnets are fixed on the surfaces facing each other of the transmission members so as to be opposed to each other and spaced apart from each other, and the plurality of magnets are arranged in the circumferential direction, and the polarities of the magnetic poles are the circumferential direction. A device for preventing excessive torque, which is characterized by alternating directions.
石は、軸心方向に並んだ複数の円周のそれぞれに沿って
複数列に配列されていることを特徴とする、請求項９に
記載した過大トルクの防止装置。10. The plurality of magnets arranged in the circumferential direction are arranged in a plurality of rows along each of the plurality of circumferences arranged in the axial direction. Excessive torque prevention device described in.
び、凸曲面を有する伝動部材は、それぞれ磁性体で構成
されており、かつ、前記の磁石は両面に磁極を有する平
板状の磁石であることを特徴とする、請求項６または請
求項７に記載した過大トルクの防止装置。11. The transmission member having a concave curved surface and the transmission member having a convex curved surface are each made of a magnetic material, and the magnet is a flat magnet having magnetic poles on both sides. The over-torque prevention device according to claim 6 or 7, characterized in that.
動板に配列した磁石は、それぞれ、その取付位置を調節
して、伝達トルクの最大値を調節し得る構造であること
を特徴とする、請求項４に記載した過大トルクの防止装
置。12. The magnet arranged on the drive plate and the magnet arranged on the driven plate have a structure capable of adjusting a mounting position thereof to adjust a maximum value of a transmission torque. A device for preventing excessive torque according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33502791A JPH05168222A (en) | 1991-12-18 | 1991-12-18 | Method of preventing excessive torque and its preventive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33502791A JPH05168222A (en) | 1991-12-18 | 1991-12-18 | Method of preventing excessive torque and its preventive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05168222A true JPH05168222A (en) | 1993-07-02 |
Family
ID=18283924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33502791A Pending JPH05168222A (en) | 1991-12-18 | 1991-12-18 | Method of preventing excessive torque and its preventive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05168222A (en) |
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