JPH094650A - Torque limiter - Google Patents

Torque limiter

Info

Publication number
JPH094650A
JPH094650A JP7176788A JP17678895A JPH094650A JP H094650 A JPH094650 A JP H094650A JP 7176788 A JP7176788 A JP 7176788A JP 17678895 A JP17678895 A JP 17678895A JP H094650 A JPH094650 A JP H094650A
Authority
JP
Japan
Prior art keywords
torque limiter
leaf spring
pocket
outer ring
roller
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.)
Granted
Application number
JP7176788A
Other languages
Japanese (ja)
Other versions
JP3686127B2 (en
Inventor
Toshio Iiyama
俊男 飯山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Origin Electric Co Ltd
Original Assignee
Origin Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Origin Electric Co Ltd filed Critical Origin Electric Co Ltd
Priority to JP17678895A priority Critical patent/JP3686127B2/en
Publication of JPH094650A publication Critical patent/JPH094650A/en
Application granted granted Critical
Publication of JP3686127B2 publication Critical patent/JP3686127B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
    • F16D7/06—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with intermediate balls or rollers
    • F16D7/10—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with intermediate balls or rollers moving radially between engagement and disengagement

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Abstract

PURPOSE: To provide a torque limiter capable of holding a large torque value, further increasing smoothly the torque and presenting racing with quick response while effecting no adverse influence on the maximum limit torque obtained even if an outer ring is made of a metal material. CONSTITUTION: A torque limiter is provided with a plurality of hollow pockets 1B extending radially outward from the inner peripheral surface 1A of an outer ring 1. Roller members 2 and spring members 4 to press the roller members 2 are incorporated one by one into these pockets. Slits 1C, 1D for holding a flat spring extending radially from the intermediate portion of the side wall of each pocket are provided while a flat spring 3 held in the slit to cross radially the hollow pocket 1B is provided. When the roller member is pressed against the side wall at the opposite side to the spring member incorporated in the hollow pocket 1B, at least the flat spring 3 is bent radially outward by the roller member.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は，比較的大きなトルクを
伝達するのに適したトルクリミッタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque limiter suitable for transmitting a relatively large torque.

【０００２】[0002]

【従来の技術】一方向クラッチの基本構造を利用したト
ルクリミッタとして、例えば実開平１ー１５８８２７号
公報に開示されたものがある。このトルクリミッタは、
図４に示すように内周面に複数のクラッチカム面１０を
設けた外輪１の内部に、軸１１を挿通させ、クラッチカ
ム面１０と軸１１との間にローラ２を組み込み、そのロ
ーラ２を押圧バネ４によりクラッチカム面１０と軸１１
との間に対して食い込み方向に押圧している。このよう
な構造では、押圧バネ４のバネ力とローラ２が作用する
クラッチカム面１０の角度を適宜に設定することによ
り、軸１１の一方向の回転に対してオン・オフトルクを
発生することができる。2. Description of the Related Art A torque limiter utilizing the basic structure of a one-way clutch is disclosed in, for example, Japanese Utility Model Publication No. 1-158827. This torque limiter
As shown in FIG. 4, a shaft 11 is inserted inside an outer ring 1 having a plurality of clutch cam surfaces 10 provided on the inner peripheral surface thereof, and a roller 2 is incorporated between the clutch cam surface 10 and the shaft 11. The clutch cam surface 10 and the shaft 11 by the pressing spring 4.
It is pressed in the direction of biting in between. With such a structure, by appropriately setting the spring force of the pressing spring 4 and the angle of the clutch cam surface 10 on which the roller 2 acts, on / off torque can be generated with respect to the rotation of the shaft 11 in one direction. it can.

【０００３】しかしこのような構造のトルクリミッタで
は、正逆の回転方向に対して異なる保持用トルクを発生
させることができす、この構造のトルクリミッタを用い
て、必要な正逆の回転方向の保持用トルクを発生させる
には、正逆の回転方向に作用する２個のトルクリミッタ
と、回転軸の回転を切り換える一方向クラッチを回転軸
に組付ける必要がある。しかしこれでは部品点数が多く
なるために、装置が大型化すると共に。製造コストが増
大する。However, in the torque limiter having such a structure, different holding torques can be generated in the forward and reverse rotation directions. By using the torque limiter having this structure, the required forward and reverse rotation directions can be changed. In order to generate the holding torque, it is necessary to assemble two torque limiters that act in the normal and reverse rotation directions and a one-way clutch that switches the rotation of the rotation shaft on the rotation shaft. However, this increases the number of parts, which increases the size of the device. Manufacturing cost increases.

【０００４】この欠点を解決するトルクリミッタとし
て、特開平４ー１３１５２７号公報に開示されたものが
ある。このトルクリミッタは、正逆方向の異なる回転ト
ルクを伝達するために、外輪の１箇所に外周面から内周
面に至る放射方向の割れ目を備えるところに特徴があ
る。外輪側に作用する負荷が増加すると、外輪の割れ目
が開き、ローラの食い込み量が増大する。さらに負荷が
増大してローラが食い込んで防止壁に接触するとき、そ
れ以上の負荷を支えることができずに軸は空転し、トル
クリミッタとして機能するものである。As a torque limiter for solving this drawback, there is a torque limiter disclosed in Japanese Patent Laid-Open No. 4-131527. This torque limiter is characterized in that a radial split from the outer peripheral surface to the inner peripheral surface is provided at one location of the outer ring in order to transmit different rotational torques in the forward and reverse directions. When the load acting on the outer ring side increases, the cracks in the outer ring open, and the bite amount of the roller increases. When the load further increases and the roller bites into contact with the prevention wall, the shaft cannot idle any more and the shaft idles, and functions as a torque limiter.

【０００５】[0005]

【発明が解決しようとする課題】しかしこのような構造
のトルクリミッタは、部品点数が少ないなどの優れた面
も有しているが、主として外輪の割れ目によるバネ性、
その材料自身の弾性、および楔形空間の形状によって伝
達トルク値が決められるので、比較的大きなトルク値を
得にくいこと、また材料が特定の合成樹脂に限定されて
しまうので、無理にトルク値を大きくすると満足する寿
命が得られなくなること、あるいは割れ目近傍のポケッ
トと割れ目から離れたポケットではその割れ目の開放の
影響が違うため、トルク値が異なり、トルクリミッタの
信頼性を低下させるなどの欠点がある。However, the torque limiter having such a structure also has an excellent surface such as a small number of parts, but mainly has a spring property due to a crack in the outer ring,
Since the transmission torque value is determined by the elasticity of the material itself and the shape of the wedge-shaped space, it is difficult to obtain a relatively large torque value, and since the material is limited to a specific synthetic resin, the torque value is forcibly increased. Then, a satisfactory life cannot be obtained, or the effect of opening the crack is different between the pocket near the crack and the pocket away from the crack, so the torque value is different and the reliability of the torque limiter is reduced. .

【０００６】本発明は、従来に比べて簡単な構造で大き
な最大制限トルク値を保持することが可能で、しかもス
ムーズなトルクの増大と応答の早い空転を与え得るトル
クリミッタを提供することを主目的とし、また外輪を金
属材料製としても得られるトルクに悪影響を与えないト
ルクリミッタを提供することも目的としている。The present invention mainly provides a torque limiter capable of holding a large maximum limit torque value with a simpler structure than the conventional one, and further capable of giving a smooth torque increase and a quick response idling. Another object is to provide a torque limiter which does not adversely affect the torque obtained even when the outer ring is made of a metal material.

【０００７】[0007]

【問題を解決するための手段】前述のような問題を解決
するため，請求項１の発明では、外輪の内周縁から放射
外方向へ延びる中空のポケットを複数個備え、これらポ
ケットに１個づつローラ部材および該ローラ部材を押圧
するバネ部材を組み込んでなるトルクリミッタにおい
て、前記各ポケットの側壁の中間部分からほぼ回転方向
に延びる板バネ保持用スリットを備えると共に、該スリ
ットに保持されて前記中空のポケットをほぼ回転方向に
延びる板バネを備え、前記ローラ部材が前記中空のポケ
ットに組み込まれた前記バネ部材の固定された側壁とは
反対側の側壁に押圧力されるときには、少なくとも前記
板バネが前記ローラ部材により放射外方向に湾曲させら
れることを特徴とするトルクリミッタを提供する。In order to solve the above problems, in the invention of claim 1, a plurality of hollow pockets extending radially outward from the inner peripheral edge of the outer ring are provided, and each of these pockets is provided one by one. A torque limiter incorporating a roller member and a spring member for pressing the roller member, comprising a leaf spring holding slit extending substantially in a rotational direction from an intermediate portion of a side wall of each pocket, and holding the slit to hold the hollow. At least when the roller member is pressed against the side wall of the spring member incorporated in the hollow pocket opposite to the fixed side wall of the spring member. Is curved radially outward by the roller member.

【０００８】前述のような問題を解決するため，請求項
２の発明では、前記各ポケットの前記板バネが前記外輪
の内周縁に対し一様な方向に傾斜していることを特徴と
する請求項１に記載のトルクリミッタを提供する。In order to solve the above problems, the invention of claim 2 is characterized in that the leaf springs of the pockets are inclined in a uniform direction with respect to the inner peripheral edge of the outer ring. A torque limiter according to item 1 is provided.

【０００９】前述のような問題を解決するため，請求項
３の発明では、前記各ポケットの前記板バネの内、ある
ものは前記外輪の内周縁に対しある方向に傾斜してお
り、他のものは前記外輪の内周面に対し別の方向に傾斜
していることを特徴とする請求項１に記載のトルクリミ
ッタを提供する。In order to solve the above-mentioned problem, in the invention of claim 3, some of the leaf springs of each of the pockets are inclined in a certain direction with respect to the inner peripheral edge of the outer ring, and The torque limiter according to claim 1, wherein the object is inclined in a different direction with respect to the inner peripheral surface of the outer ring.

【００１０】前述のような問題を解決するため，請求項
４の発明では、外輪の内周面から放射外方向へ延びる中
空のポケットを複数個備え、これらポケットに１個づつ
ローラ部材を組み込んでなるトルクリミッタにおいて、
前記各ポケットの対向する側壁のそれぞれの中間部分か
らほぼ回転方向に沿って延びる板バネ保持用スリットを
備えると共に、該スリットに保持されて前記中空のポケ
ットを前記外輪の内周面に対し実質的に傾斜しない方向
に横切る板バネを備え、動作時には前記バネ部材が前記
ローラ部材から力を受けて放射外方向に湾曲させられる
ことを特徴とするトルクリミッタを提供する。In order to solve the above-mentioned problem, in the invention of claim 4, a plurality of hollow pockets extending radially outward from the inner peripheral surface of the outer ring are provided, and one roller member is incorporated into each of these pockets. In the torque limiter
A slit for holding a leaf spring is provided extending substantially in the direction of rotation from an intermediate portion of each of the side walls of the pockets facing each other, and the hollow pocket held by the slit substantially extends from the inner peripheral surface of the outer ring. The torque limiter is characterized in that it has a leaf spring that traverses in a direction that does not tilt, and that the spring member is bent in the radial outward direction by receiving a force from the roller member during operation.

【００１１】前述のような問題を解決するため，請求項
５の発明では、前記板バネはその端部よりも中央部が厚
いことを特徴とする請求項１ないし請求項４のいずれか
に記載のトルクリミッタを提供する。In order to solve the above-mentioned problems, the invention of claim 5 is characterized in that the central portion of the leaf spring is thicker than the end portions thereof. To provide a torque limiter.

【００１２】前述のような問題を解決するため，請求項
６の発明では、前記板ローラ部材に代えてボールを用い
たことを特徴とする請求項１ないし請求項５のいずれか
に記載のトルクリミッタを提供する。In order to solve the above problems, in the invention of claim 6, balls are used in place of the plate roller member, and the torque according to any one of claims 1 to 5. Provides a limiter.

【００１３】前述のような問題を解決するため，請求項
６の発明では、前記板バネは前記バネ部材の固定された
側壁とは反対側の側壁に形成された前記スリットにより
片持ちで支持されていることを特徴とする請求項１ない
し請求項３、あるいは請求項５又は請求項６のいずれか
に記載のトルクリミッタを提供する。In order to solve the above-mentioned problems, in the invention of claim 6, the leaf spring is cantilevered by the slit formed in the side wall opposite to the side wall where the spring member is fixed. A torque limiter according to any one of claims 1 to 3 or claim 5 or claim 6 is provided.

【００１４】[0014]

【実施例】以下図面により本発明にかかるトルクリミッ
タの一実施例を説明する。先ず図１により本発明の一実
施例を説明すると，合成樹脂製の外輪１には内周縁１Ａ
に沿ってほぼ一定間隔で６個の中空のポケット１Ｂが形
成されている。各ポケット１Ｂはほぼ同一形状で同じ大
きさであり、内周縁１Ａではローラ２が内周縁１Ａから
脱落しないように、ローラ２の直径よりも小さな幅を有
する。各ポケット１Ｂは内周面からテーパー状に広がっ
てローラ２の直径よりも大きな幅となり、底面１Ｂａま
で延びる。また、各ポケット１Ｂはローラ２の直径より
も大きな深さをもち、その底面１Ｂａよりも上の箇所
で、各ポケット１Ｂのほぼ平坦な側壁１Ｂｂ，１Ｂｃか
らほぼ回転方向に沿ってスリット１Ｃ，１Ｄが延びる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a torque limiter according to the present invention will be described below with reference to the drawings. First, one embodiment of the present invention will be described with reference to FIG. 1. The outer ring 1 made of synthetic resin has an inner peripheral edge 1A.
Six hollow pockets 1B are formed at substantially regular intervals along. Each pocket 1B has substantially the same shape and the same size, and has a width smaller than the diameter of the roller 2 at the inner peripheral edge 1A so that the roller 2 does not fall off the inner peripheral edge 1A. Each pocket 1B spreads in a taper shape from the inner peripheral surface, has a width larger than the diameter of the roller 2, and extends to the bottom surface 1Ba. Further, each pocket 1B has a depth larger than the diameter of the roller 2 and is located above the bottom surface 1Ba of the pocket 1B from the substantially flat side walls 1Bb, 1Bc of the pocket 1B along the slits 1C, 1D. Extends.

【００１５】スリット１Ｃと１Ｄは、外輪１の中央穴の
中心点Ｚからみて、右下がりとなるように、スリット１
Ｄに比べてスリット１Ｃは内周縁１Ａに近い側に位置す
る。しかしスリット１Ｃと１Ｄはほぼ直線上にあり、ス
リット１Ｃと１Ｄに板バネ３が挿し込めるようになって
いる。スリット１Ｃと１Ｄは図２からも分かるように、
側壁１Ｂｂ，１Ｂｃ近傍部では一般的な板バネ３の厚み
よりも若干だけおおきな幅を持ち、その奥では板バネ３
の先端部分が遊べるだけの空間１Ｃａ，１Ｄａをもって
いる。また、各ポケット１Ｂの底面１Ｂａと板バネ３と
の間の間隙は、板バネ３の最大湾曲時にも板バネ３がそ
の底面１Ｂａに接触しない程度に設定される。したがっ
て、ローラ２が板バネ３を放射外方向に押圧するとき、
板バネ３は放射外方向に湾曲することができ、所定の弾
性力を保持してローラ２に対して加圧力を与えることが
できる。The slits 1C and 1D are arranged so that the slits 1C and 1D are inclined downward to the right when viewed from the center point Z of the central hole of the outer ring 1.
The slit 1C is located closer to the inner peripheral edge 1A than D. However, the slits 1C and 1D are substantially linear, and the leaf spring 3 can be inserted into the slits 1C and 1D. As can be seen from FIG. 2, the slits 1C and 1D are
In the vicinity of the side walls 1Bb and 1Bc, the width is slightly larger than the thickness of the general leaf spring 3, and at the back thereof, the leaf spring 3 is provided.
Has spaces 1Ca and 1Da where the tip of can be played. Further, the gap between the bottom surface 1Ba of each pocket 1B and the leaf spring 3 is set so that the leaf spring 3 does not contact the bottom surface 1Ba even when the leaf spring 3 is maximally curved. Therefore, when the roller 2 presses the leaf spring 3 in the radial outward direction,
The leaf spring 3 can be curved outward in the radial direction, can hold a predetermined elastic force, and can apply a pressing force to the roller 2.

【００１６】ここで４は押圧バネであり、板バネ３をス
リット１Ｃと１Ｄに押し込んだときの板バネ３の上がり
傾斜側の側壁１Ｂｃに取り付けられる。また、図１
（Ｂ）からも分かるように、外輪１における他端側は閉
じられており、各ポケット１Ｂの深さはローラ２の長さ
よりも若干大きい。板バネ３の外輪１の厚み方向の寸法
はローラ２の長さとほぼ同程度である。Reference numeral 4 is a pressing spring, which is attached to the side wall 1Bc on the upward slope side of the leaf spring 3 when the leaf spring 3 is pushed into the slits 1C and 1D. Also, FIG.
As can be seen from (B), the other end side of the outer ring 1 is closed, and the depth of each pocket 1B is slightly larger than the length of the roller 2. The size of the leaf spring 3 in the thickness direction of the outer ring 1 is approximately the same as the length of the roller 2.

【００１７】次にこのトルクリミッタの組み立て方法の
１例について述べると、従来と同様にして各ポケット１
Ｂに押圧バネ４が取り付けられた外輪１を、図１（Ｂ）
で示すようにポケット１Ｂ側を上にした状態で、各ポケ
ット１Ｂにローラ２をそれぞれ挿入する。次に、板バネ
３をスリット１Ｃと１Ｄに押し込む。このとき、各ポケ
ット１Ｂに納まっている各ローラ２は、ポケット１Ｂの
内周縁１Ａから一部分が突出するから、板バネ３はロー
ラ２に邪魔されることなく、スリット１Ｃと１Ｄに押し
込まれる。また、前述のとおり、各ポケット１Ｂは内周
縁１Ａではローラ２の直径よりも小さな幅を有するの
で、ローラ２が内周縁１Ａから脱落することはない。Next, an example of a method for assembling the torque limiter will be described.
The outer ring 1 in which the pressing spring 4 is attached to B is shown in FIG.
As shown by, the roller 2 is inserted into each pocket 1B with the pocket 1B side facing up. Next, the leaf spring 3 is pushed into the slits 1C and 1D. At this time, since each roller 2 accommodated in each pocket 1B partially projects from the inner peripheral edge 1A of the pocket 1B, the leaf spring 3 is pushed into the slits 1C and 1D without being disturbed by the roller 2. Further, as described above, since each pocket 1B has a width smaller than the diameter of the roller 2 at the inner peripheral edge 1A, the roller 2 does not fall off the inner peripheral edge 1A.

【００１８】その後、グリースのような潤滑剤が必要に
応じて各ポケット１Ｂに充填され、図示していないシー
ルド板が外輪１に固着される。そして図示していない
が、外輪の中央穴にシャフト又は内輪が装着される。こ
の状態においては、板バネ３と側壁１Ｂｂとシャフト又
は内輪によって楔状空間が形成される。Thereafter, a lubricant such as grease is filled in each pocket 1B as needed, and a shield plate (not shown) is fixed to the outer ring 1. Although not shown, the shaft or the inner ring is mounted in the central hole of the outer ring. In this state, the leaf spring 3, the side wall 1Bb and the shaft or the inner ring form a wedge-shaped space.

【００１９】次にこのトルクリミッタの動作について説
明する。外輪１を駆動される物品（図示せず）に固定
し、シャフト又は内輪を矢印Ｒ方向に回転させると、各
ローラ２はシャフト又は内輪との間の摩擦力によって、
回転と滑りを行って楔状空間の狭い側に移動し、各ロー
ラ２がクラッチの役割を行って板バネ３とシャフト又は
内輪に噛みつく。これによって、シャフト又は内輪の回
転力は外輪１に伝達される。このとき板バネ３は僅かに
湾曲を始め、その弾性力でローラ２に噛みつき力を与え
る。そして、更にシャフト又は内輪が矢印Ｒ方向に回転
するのに伴い、板バネ３の湾曲が増し、そして設定回転
力以上の力がかかるとき、各ローラ２はポケット１Ｂの
側壁１Ｂｂに押し当てられ、それ以降では、シャフト又
は内輪はブレーキ力を受けながら回転を行うことにな
る。Next, the operation of the torque limiter will be described. When the outer ring 1 is fixed to a driven article (not shown) and the shaft or the inner ring is rotated in the direction of arrow R, each roller 2 is caused by the frictional force between the roller 2 and the shaft or the inner ring.
The rollers 2 rotate and slide to move to the narrow side of the wedge-shaped space, and each roller 2 serves as a clutch to engage with the leaf spring 3 and the shaft or inner ring. Thereby, the rotational force of the shaft or the inner ring is transmitted to the outer ring 1. At this time, the leaf spring 3 starts to bend slightly, and its elastic force gives a biting force to the roller 2. Then, as the shaft or the inner ring further rotates in the direction of arrow R, the bending of the leaf spring 3 increases, and when a force equal to or greater than the set rotational force is applied, each roller 2 is pressed against the side wall 1Bb of the pocket 1B, After that, the shaft or the inner ring rotates while receiving the braking force.

【００２０】次にシャフト又は内輪が矢印Ｒ方向とは逆
に回転を始めると、シャフト又は内輪とローラ２間の摩
擦力によって、ローラ２は楔状空間の広い側に移動し、
押圧バネ４に当接される。この状態では、シャフト又は
内輪が矢印Ｒ方向とは逆の回転力は外輪１にほとんど伝
達されず、シャフト又は内輪は実質的に空転を行う。Next, when the shaft or the inner ring starts rotating in the direction opposite to the arrow R direction, the roller 2 moves to the wider side of the wedge-shaped space due to the frictional force between the shaft or the inner ring and the roller 2.
It comes into contact with the pressing spring 4. In this state, the rotational force of the shaft or the inner ring opposite to the direction of the arrow R is hardly transmitted to the outer ring 1, and the shaft or the inner ring substantially idles.

【００２１】この実施例では、板バネ３を用いて楔状空
間の一辺を形成したことによって、シャフト又は内輪が
矢印Ｒ方向に回転するときには、ローラ２からの加圧力
で板バネ３が徐々に撓むので、楔状空間の傾斜が徐々に
変化し、ローラ２が側壁１Ｂｂに押し当てられた状態で
の板バネ３は微視的にみると「へ」の字状になる。この
ことは、非常にスムーズにトルクの増大が行われるの
で、このトルクリミッタを洋式便器の蓋の開閉機構に用
いた場合、その蓋を閉じるときに途中で手を離しても滑
らかに閉じ、急に閉じるようなことがなくなる。また、
ローラ２が側壁１Ｂｂに押し当てられた状態での板バネ
３は「へ」の字状になっているので、板バネ３によって
ローラ２に加えられる力の回転方向に沿ったベクトル
は、矢印方向Ｒよりもその逆方向の値が大きくなるの
で、矢印方向Ｒと逆の方向の回転力に対しては応答が非
常に速く、その回転初動の力が小さくて済む。In this embodiment, since one side of the wedge-shaped space is formed by using the leaf spring 3, when the shaft or the inner ring rotates in the direction of arrow R, the leaf spring 3 is gradually bent by the pressing force from the roller 2. Therefore, the inclination of the wedge-shaped space gradually changes, and the leaf spring 3 in a state where the roller 2 is pressed against the side wall 1Bb has a "V" shape when viewed microscopically. This means that the torque can be increased very smoothly, so when this torque limiter is used for the opening / closing mechanism of the lid of a Western-style toilet, it closes smoothly even if you release your hand during closing. It never closes. Also,
Since the leaf spring 3 in the state in which the roller 2 is pressed against the side wall 1Bb is in the shape of a letter “H”, the vector of the force applied to the roller 2 by the leaf spring 3 along the rotation direction is the arrow direction. Since the value in the opposite direction is larger than R, the response is very fast to the rotational force in the direction opposite to the arrow direction R, and the initial force of the rotation can be small.

【００２２】次に図３により本発明にかかるトルクリミ
ッタの他の１実施例について説明する。この実施例は双
方向にほぼ等しい回転トルクが発生するものであり、図
１のものと異なる点は６個のポケット１Ｂ１〜１Ｂ６の
内、それらの３個の板バネ３が右下がりで、他の３個の
板バネ３が右上がりであることである。したがって、こ
の構造のトルクリミッタでは３個のポケット１Ｂ１〜１
Ｂ３において、矢印方向Ｒの回転に対して大きなトルク
が発生し、また３個のポケット１Ｂ４〜１Ｂ６におい
て、矢印方向Ｒとは逆の回転に対して大きなトルクが発
生する。Next, another embodiment of the torque limiter according to the present invention will be described with reference to FIG. In this embodiment, almost the same rotational torque is generated in both directions. The difference from that of FIG. 1 is that among the six pockets 1B1 to 1B6, those three leaf springs 3 are in the right downward direction, and the others. That is, the three leaf springs 3 of FIG. Therefore, the torque limiter of this structure has three pockets 1B1 to 1B1.
In B3, a large torque is generated for the rotation in the arrow direction R, and in the three pockets 1B4 to 1B6, a large torque is generated for the rotation opposite to the arrow direction R.

【００２３】各ポケット１Ｂ１〜１Ｂ６に関連する各部
材として、同一構造で同一特性のものを用いれば、正逆
回転方向とも同一のトルクとなるが、別々のトルク値に
設定したい場合には、３個のポケット１Ｂ１〜１Ｂ３と
他の３個のポケット１Ｂ４〜１Ｂ６の板バネ３の厚み、
ローラ２の長さ方向の板バネ３の寸法、材質を変えるこ
とによって、容易に達成できる。また、例えばポケット
１Ｂ１と１Ｂ２の板バネの傾斜を右下がり、ポケット１
Ｂ１〜１Ｂ４の板バネの傾斜を右上がりとすることによ
って、矢印方向Ｒとその逆方向のトルク値を１：２にす
ることもできる。つまり、この実施例では双方向とも等
しいトルク値、あるいは回転方向によって異なるトルク
値を容易に得ることができる。If the members having the same structure and the same characteristics are used as the members related to the pockets 1B1 to 1B6, the same torque is applied in the forward and reverse rotation directions, but if it is desired to set different torque values, 3 The thickness of the leaf springs 3 of the individual pockets 1B1 to 1B3 and the other three pockets 1B4 to 1B6,
This can be easily achieved by changing the size and material of the leaf spring 3 in the length direction of the roller 2. Also, for example, the inclination of the leaf springs of pockets 1B1 and 1B2 is lowered to the right to
By increasing the inclination of the leaf springs B1 to 1B4 to the right, the torque value in the arrow direction R and the torque value in the opposite direction can be set to 1: 2. That is, in this embodiment, it is possible to easily obtain the same torque value in both directions or different torque values depending on the rotation direction.

【００２４】次に図示しないが、双方向にほぼ等しい回
転トルクを形成する別の実施例について図１を利用して
説明すると、外輪１の中央穴の中心点から見て板バネ３
はいずれの方向にも傾斜しないよう設定される。シャフ
ト又は内輪の外面と板バネ３との間の間隙はローラ２の
直径よりも小さく、ローラ２はシャフト又は内輪と板バ
ネ３とによって常時力を受けており、板バネ３は放射外
方向に勿論湾曲している。この状態で、シャフト又は内
輪をいずれかの方向に回転させると、各ローラ２はシャ
フト又は内輪との間の摩擦力によって、各ローラ２は板
バネ３とシャフト又は内輪に噛みつきながら回転方向と
同じ方向に移動し、シャフト又は内輪の回転力を外輪１
に伝達する。そしてさらに、シャフト又は内輪が回転し
て設定回転力以上の力がかかるとき、各ローラ２はポケ
ット１Ｂの側壁１Ｂｂに押し当てられ、それ以降では、
シャフト又は内輪はブレーキ力を受けながら回転を行う
ことになる。Next, although not shown in the drawings, another embodiment for forming substantially the same rotational torque in both directions will be described with reference to FIG. 1. The leaf spring 3 is seen from the center point of the central hole of the outer ring 1.
Is set so that it does not tilt in either direction. The gap between the outer surface of the shaft or the inner ring and the leaf spring 3 is smaller than the diameter of the roller 2. The roller 2 is constantly subjected to the force by the shaft or the inner ring and the leaf spring 3, and the leaf spring 3 is radially outward. Of course it is curved. In this state, when the shaft or the inner ring is rotated in any direction, the frictional force between the rollers 2 and the shaft or the inner ring causes the rollers 2 to rotate in the same direction as the leaf spring 3 and the shaft or the inner ring. In the direction of the outer ring 1
To communicate. Further, when the shaft or the inner ring rotates and a force equal to or greater than the set rotational force is applied, each roller 2 is pressed against the side wall 1Bb of the pocket 1B, and thereafter,
The shaft or the inner ring will rotate while receiving the braking force.

【００２５】前述の状態では、板バネ３は「へ」の字
状、つまりポケット１Ｂの側壁１Ｂｂが短くて急傾斜で
あり、ポケット１Ｂの側壁１Ｂｃが長くて緩傾斜であ
る。したがって、ローラ２に働く板バネ３の回転方向に
沿った力は矢印方向Ｒよりも逆方向の力の方が大きいの
で、シャフト又は内輪が矢印方向Ｒとは逆方向に回転を
始めるとき、押圧バネ４が存在しなくとも、即応してロ
ーラ２は矢印方向Ｒとは逆方向に移動を始める。この実
施例ではローラ２と板バネ３は双方向の回転力に対して
同じように働くので、双方向にほぼ等しい回転トルクを
維持できる。この構造ではいずれの側の側壁にも押圧バ
ネ４を設けなくとも、支障なく動作を行う。In the above-described state, the leaf spring 3 has a "V" shape, that is, the side wall 1Bb of the pocket 1B is short and steep, and the side wall 1Bc of the pocket 1B is long and gentle. Therefore, since the force acting on the roller 2 along the rotation direction of the leaf spring 3 is larger in the opposite direction than the arrow direction R, when the shaft or the inner ring starts rotating in the direction opposite to the arrow direction R, the pressing force is applied. Even if the spring 4 does not exist, the roller 2 immediately starts moving in the direction opposite to the arrow R direction. In this embodiment, the roller 2 and the leaf spring 3 act in the same manner with respect to the rotational force in both directions, so that the rotational torque can be maintained substantially equal in both directions. In this structure, the operation can be performed without trouble even if the pressing spring 4 is not provided on either side wall.

【００２６】本発明のトルクリミッタの構造では、外輪
を弾力性の乏しい金属材料で製作しても、トルクリミッ
タの動作に影響がないので、機械的に丈夫なトルクリミ
ッタを提供することができる。また、以上の実施例では
いずれもポケットを６個にしたが、３個以上の任意の個
数で良い。In the structure of the torque limiter of the present invention, even if the outer ring is made of a metal material having poor elasticity, the operation of the torque limiter is not affected, so that a mechanically durable torque limiter can be provided. Further, in the above embodiments, the number of pockets is 6, but any number of 3 or more may be used.

【００２７】以上の実施例では各ポケットの対向する双
方の側壁にスリットを設けて、板バネを双方の側壁で支
持したが、楔状空間の狭い側の側壁だけにスリットを設
け、そのスリットに板バネの一端を押し込んで片持ち構
造とすることもできる。この場合には、前述のような両
持ち構造に比べて、最大制限トルク値が小さくならざる
をえないが、同様な効果が得られる。In the above embodiment, slits are provided on both side walls of each pocket which face each other, and the leaf spring is supported by both side walls. However, the slits are provided only on the narrow side walls of the wedge-shaped space, and the slits are provided with a plate. It is also possible to push one end of the spring into a cantilever structure. In this case, the maximum limiting torque value must be smaller than that of the double-supported structure as described above, but the same effect can be obtained.

【００２８】またこのトルクリミッタでは、外輪を変え
ることなく、板バネ３の厚み、材質、幅などを変更する
だけで、所望の最大制限トルク値を変えることができ
る。なお、図示しないが、従来と同様に同心円状に内外
２重の構造にも本発明は適用でき、この場合には内外の
板バネの傾斜を互いに逆方向にすることにより、双方向
等しいより大きな最大制限トルクを呈するトルクリミッ
タを得ることができる。また、以上の実施例ではいずれ
もローラを用いたが、ローラに代えてボールを用いるこ
とができ、ローラの場合と同様に動作する。In this torque limiter, the desired maximum limiting torque value can be changed by changing the thickness, material, width, etc. of the leaf spring 3 without changing the outer ring. Although not shown, the present invention can also be applied to a concentric inner / outer double structure as in the conventional case. In this case, the inclinations of the inner and outer leaf springs are opposite to each other, so that the two directions are equal to each other. It is possible to obtain the torque limiter exhibiting the maximum limit torque. Further, although the rollers are used in all of the above embodiments, balls can be used instead of the rollers, and the same operation as that of the rollers is performed.

【００２９】さらにまた、板バネは必ずしも平板でなく
とも良く、ローラ側に凹むように湾曲していても良い。
従来例と同様にトルクリミッタをハウジング内に収納し
た構造でも良く、外輪を金属材料で構成した場合にはシ
ールド板をスポット溶接することもできる。Furthermore, the leaf spring does not necessarily have to be a flat plate and may be curved so as to be recessed toward the roller.
As in the conventional example, the torque limiter may be housed in the housing, and the shield plate may be spot-welded when the outer ring is made of a metal material.

【００３０】[0030]

【発明の効果】以上述べたように，本発明によれば，ト
ルクリミッタの楔状空間を形成する一辺を板バネで形成
しているので、外輪の基本的構造を変えることなく、板
バネの厚み、材質、幅などを変えるだけで、その最大制
限トルク値を変更することができ、しかも板バネの湾曲
で楔状空間の傾斜が変化するので、最大制限トルク値ま
でスムーズに大きくできると共に、空転の方向では即応
性に優れているなど実際上の効果は大きい。As described above, according to the present invention, since one side forming the wedge-shaped space of the torque limiter is formed by the leaf spring, the thickness of the leaf spring can be changed without changing the basic structure of the outer ring. The maximum limit torque value can be changed simply by changing the material, width, etc. Moreover, since the inclination of the wedge-shaped space changes due to the bending of the leaf spring, the maximum limit torque value can be increased smoothly and the idling In terms of direction, it has great practical effects such as excellent responsiveness.

【００３１】また，本発明の構造によれば、双方向の回
転力に対してほぼ同じ最大制限トルク値、あるいは異な
る最大制限トルク値を呈するトルクリミッタを容易に得
ることができる。Further, according to the structure of the present invention, it is possible to easily obtain the torque limiter exhibiting substantially the same maximum limit torque value or different maximum limit torque values with respect to the bidirectional torque.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を説明するための図である。FIG. 1 is a diagram for explaining an embodiment of the present invention.

【図２】本発明の一実施例のポケットとスリット部分を
説明するための図である。FIG. 2 is a diagram for explaining a pocket and a slit portion according to an embodiment of the present invention.

【図３】本発明の他の一実施例を説明するための図であ
る。FIG. 3 is a diagram for explaining another embodiment of the present invention.

【図４】従来のトルクリミッタの一例を説明するための
図である。FIG. 4 is a diagram for explaining an example of a conventional torque limiter.

【符号の説明】[Explanation of symbols]

１・・・・トルクリミッタの外輪 ２・・・・
ローラ（又はボール） １Ａ・・・外輪の内周縁 ３・・・・
板バネ １Ｂ・・・ポケット ４・・・・
押圧バネ １Ｂａ・・・・ポケットの底 １Ｂｂ，１Ｂｃ・・ポケットの側壁 １Ｃ，１Ｄ・・・・スリット1 ... Outer ring of torque limiter 2 ...
Roller (or ball) 1A ... Inner peripheral edge of outer ring 3 ...
Leaf spring 1B ・ ・ ・ Pocket 4 ・ ・ ・
Pressing spring 1Ba ・ ・ ・ ・ Pocket bottom 1Bb, 1Bc ・ ・ Pocket side wall 1C, 1D ・ ・ ・ ・ Slit

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 外輪の内周縁から放射外方向へ延びる中
空のポケットを複数個備え、これらポケットに１個づつ
ローラ部材および該ローラ部材を押圧するバネ部材を組
み込んでなるトルクリミッタにおいて、 前記各ポケットの側壁の中間部分からほぼ回転方向に沿
って延びる板バネ保持用スリットを備えると共に、該ス
リットに保持されて前記中空のポケットをほぼ回転方向
に延びる板バネを備え、前記ローラ部材が前記中空のポ
ケットに組み込まれた前記バネ部材の固定された側壁と
は反対側の側壁に押圧されるときには、少なくとも前記
板バネが前記ローラ部材により放射外方向に湾曲させら
れることを特徴とするトルクリミッタ。1. A torque limiter comprising a plurality of hollow pockets extending radially outward from an inner peripheral edge of an outer ring, each of which has a roller member and a spring member for pressing the roller member incorporated therein. A slit for holding a leaf spring extending substantially in the direction of rotation from an intermediate portion of the side wall of the pocket is provided, and a leaf spring held in the slit and extending in the direction of rotation of the hollow pocket is provided, and the roller member is hollow. A torque limiter characterized in that at least the leaf spring is bent radially outward by the roller member when pressed against the side wall of the spring member incorporated in the pocket opposite to the fixed side wall. 【請求項２】前記各ポケットの前記板バネが前記外輪の
内周縁に対し一様な方向に傾斜していることを特徴とす
る請求項１に記載のトルクリミッタ。2. The torque limiter according to claim 1, wherein the leaf spring of each pocket is inclined in a uniform direction with respect to the inner peripheral edge of the outer ring. 【請求項３】前記各ポケットの前記板バネの内、あるも
のは前記外輪の内周縁に対しある方向に傾斜しており、
他のものは前記外輪の内周面に対し別の方向に傾斜して
いることを特徴とする請求項１に記載のトルクリミッ
タ。3. Some of the leaf springs of each of the pockets are inclined in a certain direction with respect to the inner peripheral edge of the outer ring,
The torque limiter according to claim 1, wherein the other members are inclined in a different direction with respect to the inner peripheral surface of the outer ring. 【請求項４】外輪の内周面から放射外方向へ延びる中空
のポケットを複数個備え、これらポケットに１個づつロ
ーラ部材を組み込んでなるトルクリミッタにおいて、 前記各ポケットの対向する側壁のそれぞれの中間部分か
らほぼ回転方向に沿って延びる板バネ保持用スリットを
備えると共に、該スリットに保持されて前記中空のポケ
ットを前記外輪の内周面に対し実質的に傾斜しない方向
に横切る板バネを備え、動作時には前記バネ部材が前記
ローラ部材から力を受けて放射外方向に湾曲させられる
ことを特徴とするトルクリミッタ。4. A torque limiter comprising a plurality of hollow pockets extending radially outward from an inner peripheral surface of an outer ring, each roller pocket being incorporated into each of the pockets. A leaf spring holding slit extending substantially in the rotational direction from the intermediate portion is provided, and a leaf spring held by the slit and traversing the hollow pocket in a direction not substantially inclined with respect to the inner peripheral surface of the outer ring is provided. The torque limiter, wherein the spring member receives a force from the roller member and is curved outward in a radial direction during operation. 【請求項５】前記板バネはその端部よりも中央部が厚い
ことを特徴とする請求項１ないし請求項４のいずれかに
記載のトルクリミッタ。5. The torque limiter according to claim 1, wherein a central portion of the leaf spring is thicker than an end portion thereof. 【請求項６】前記板ローラ部材に代えてボールを用いた
ことを特徴とする請求項１ないし請求項５のいずれかに
記載のトルクリミッタ。6. The torque limiter according to claim 1, wherein a ball is used instead of the plate roller member. 【請求項７】前記板バネは前記バネ部材の固定された側
壁とは反対側の側壁に形成された前記スリットにより片
持ちで支持されていることを特徴とする請求項１ないし
請求項３、あるいは請求項５又は請求項６のいずれかに
記載のトルクリミッタ。7. The leaf spring is cantilevered by the slit formed in the side wall opposite to the side wall to which the spring member is fixed. Alternatively, the torque limiter according to claim 5 or claim 6.
JP17678895A 1995-06-20 1995-06-20 Torque limiter Expired - Fee Related JP3686127B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17678895A JP3686127B2 (en) 1995-06-20 1995-06-20 Torque limiter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17678895A JP3686127B2 (en) 1995-06-20 1995-06-20 Torque limiter

Publications (2)

Publication Number Publication Date
JPH094650A true JPH094650A (en) 1997-01-07
JP3686127B2 JP3686127B2 (en) 2005-08-24

Family

ID=16019865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17678895A Expired - Fee Related JP3686127B2 (en) 1995-06-20 1995-06-20 Torque limiter

Country Status (1)

Country Link
JP (1) JP3686127B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012167574A (en) * 2011-02-10 2012-09-06 Zama Japan Co Ltd Throttle valve device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012167574A (en) * 2011-02-10 2012-09-06 Zama Japan Co Ltd Throttle valve device

Also Published As

Publication number Publication date
JP3686127B2 (en) 2005-08-24

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