JP2012122585A - Reverse input blocking clutch - Google Patents

Reverse input blocking clutch Download PDF

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JP2012122585A
JP2012122585A JP2010275634A JP2010275634A JP2012122585A JP 2012122585 A JP2012122585 A JP 2012122585A JP 2010275634 A JP2010275634 A JP 2010275634A JP 2010275634 A JP2010275634 A JP 2010275634A JP 2012122585 A JP2012122585 A JP 2012122585A
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input
rotating member
flywheel
clutch
output
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Japanese (ja)
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Seiichi Takada
声一 高田
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2010275634A priority Critical patent/JP2012122585A/en
Priority to PCT/JP2011/078160 priority patent/WO2012077669A1/en
Publication of JP2012122585A publication Critical patent/JP2012122585A/en
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    • 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
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
    • 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
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
    • F16D41/206—Freewheels or freewheel clutches with expandable or contractable clamping ring or band having axially adjacent coils, e.g. helical wrap-springs
    • 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
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the co-rotation of an input rotation member to reverse input torque applied after the transmission of the input torque, in a reverse input blocking clutch for transmitting only input torque in one direction.SOLUTION: A spring clutch is used as a locking means for engaging (locking) an input gear 1 and an output rotation member 4 with each other so that torque can be transmitted in a specific direction. A one-way clutch 8, allowing the flywheel 6 to run idle in a specific direction and to stop the rotation of the same in the reverse direction by causing the same to engage with the stationary ring 7, is installed between a flywheel 6 and a stationary ring 7 which are elastically connected to the input gear 1 by a coiled spring 5 of the spring clutch. Thus, when the supply of input torque in the specific direction is stopped, the flywheel 6 rotates by inertia to unlock the lock state between the input gear 1 and the output rotation member 4, and then stops after slightly rotating in the reverse direction by the elastic restoration of the coiled spring 5. As a result, the unlocked state is maintained.

Description

本発明は、入力側に加えられる入力トルクを出力側に伝達し、出力側に加えられる逆入力トルクは入力側に伝達されないようにする逆入力遮断クラッチに関する。   The present invention relates to a reverse input cutoff clutch that transmits input torque applied to an input side to an output side and prevents reverse input torque applied to an output side from being transmitted to an input side.

逆入力遮断クラッチは、同一軸心のまわりに回転する入力回転部材と出力回転部材とをトルク伝達可能に連結し、その連結部に逆入力遮断機構、すなわち入力回転部材に加えられる入力トルクを出力回転部材に伝達し、出力回転部材に加えられる逆入力トルクは入力回転部材に伝達しない機構を設けたものである。   The reverse input cutoff clutch connects an input rotary member and an output rotary member that rotate about the same axis so that torque can be transmitted, and outputs an input torque applied to the reverse input cutoff mechanism, that is, the input rotary member, to the connecting portion. A mechanism is provided in which reverse input torque transmitted to the rotating member and applied to the output rotating member is not transmitted to the input rotating member.

ところで、逆入力遮断クラッチの使用条件としては、入力回転部材の回転方向が一方向に限定されている場合があることから、本出願人は、このような条件のもとで使用するのに適したコンパクトな逆入力遮断クラッチとして、所定の一方向（一定方向）の入力トルクのみを伝達し、逆入力トルクに対しては出力回転部材が空転する構造のものを提案した（特許文献１参照。）。   By the way, as a use condition of the reverse input cut-off clutch, since the rotation direction of the input rotation member may be limited to one direction, the present applicant is suitable for use under such a condition. As a compact reverse input shut-off clutch, there has been proposed a structure in which only an input torque in a predetermined direction (constant direction) is transmitted and an output rotating member is idled with respect to the reverse input torque (see Patent Document 1). ).

上記特許文献１に記載された逆入力遮断クラッチの具体的な構造は、入力回転部材の径方向内側に入力回転部材と同心状態に出力回転部材を配し、その出力回転部材の外周面を円筒面とし、入力回転部材の内周面に所定の周方向間隔をおいて複数のポケットを設け、これらの各ポケットの底側に同一方向に傾斜するカム面を設けて、各ポケットのカム面と出力回転部材の円筒面との間に周方向の一側で次第に狭小となる楔形空間を形成し、各ポケットに、ころと、ころを楔形空間の広大側へ向けて付勢する付勢ばねと、ころを挟んで付勢ばねと対向する位置に配される押さえ板とを収容し、押さえ板に固定部材と摺動する摺動ばねを取り付けたものである。   The specific structure of the reverse input shut-off clutch described in Patent Document 1 is that an output rotating member is arranged concentrically with the input rotating member on the radially inner side of the input rotating member, and the outer peripheral surface of the output rotating member is cylindrical. A plurality of pockets at predetermined circumferential intervals on the inner peripheral surface of the input rotation member, and cam surfaces inclined in the same direction on the bottom side of each pocket, A wedge-shaped space that gradually narrows on one side in the circumferential direction between the cylindrical surface of the output rotating member, a roller, and a biasing spring that biases the roller toward the wide side of the wedge-shaped space in each pocket; A holding plate disposed at a position opposite to the biasing spring with the rollers interposed therebetween is accommodated, and a sliding spring that slides on the fixing member is attached to the holding plate.

このクラッチでは、入力回転部材に一定方向の入力トルクが加えられると、ころが固定部材から摺動ばねを介して回転抵抗を受ける押さえ板に押され、付勢ばねの弾性力に抗して楔形空間の狭小側へ相対移動して入力回転部材および出力回転部材と係合することにより、出力回転部材にトルクが伝達される。一方、出力回転部材に逆入力トルクが加えられたときは、付勢ばねがころおよび押さえ板を楔形空間の広大側へ押すことにより、ころの入力回転部材および出力回転部材との係合（ロック）が解除された状態となるので、出力回転部材が空転して入力回転部材にはトルクが伝達されないようになっている。   In this clutch, when an input torque in a certain direction is applied to the input rotating member, the roller is pushed by the holding plate that receives rotational resistance from the fixed member via the sliding spring, and is wedge-shaped against the elastic force of the biasing spring. Torque is transmitted to the output rotating member by relatively moving to the narrow side of the space and engaging the input rotating member and the output rotating member. On the other hand, when reverse input torque is applied to the output rotating member, the biasing spring pushes the roller and the pressing plate toward the wide side of the wedge-shaped space, thereby engaging the roller with the input rotating member and the output rotating member (locking). ) Is released, the output rotating member is idled so that torque is not transmitted to the input rotating member.

特開２００５−３５１４２２号公報JP-A-2005-351422

ところが、上述した特許文献１に記載の逆入力遮断クラッチでは、入力回転部材に入力トルクが加えられて出力回転部材にトルクが伝達された後、入力トルクと逆方向の逆入力トルクが出力回転部材に加えられたときに、入力回転部材が出力回転部材と共回りしてしまうことがある。これは、トルク伝達直後には、ころのロック状態が保持されているからである。すなわち、トルク伝達後のロック状態において、入力トルクと同方向の逆入力トルクが加えられると、ころが出力回転部材から受ける摩擦力と付勢ばねの弾性力により楔形空間の広大側へ移動してロック状態が解除され、出力回転部材が空転するが、逆方向の逆入力トルクが加えられた場合は、ロック状態が解除されず、逆入力トルクが入力回転部材に伝達されてしまうのである。   However, in the reverse input cutoff clutch described in Patent Document 1 described above, after the input torque is applied to the input rotating member and the torque is transmitted to the output rotating member, the reverse input torque in the direction opposite to the input torque is output to the output rotating member. The input rotating member may rotate together with the output rotating member. This is because the roller is kept locked immediately after torque transmission. That is, when a reverse input torque in the same direction as the input torque is applied in the locked state after torque transmission, the roller moves to the wide side of the wedge-shaped space by the frictional force received from the output rotating member and the elastic force of the biasing spring. Although the locked state is released and the output rotating member idles, when the reverse input torque in the reverse direction is applied, the locked state is not released and the reverse input torque is transmitted to the input rotating member.

そこで、本発明は、一方向の入力トルクのみを伝達する逆入力遮断クラッチにおいて、入力トルク伝達後の逆入力トルクに対して入力回転部材の共回りを防止することを課題とする。   Accordingly, an object of the present invention is to prevent the input rotation member from rotating together with the reverse input torque after the input torque is transmitted in the reverse input cutoff clutch that transmits only one-way input torque.

上記の課題を解決するため、本発明は、入力回転部材と出力回転部材とを同一軸心のまわりに回転自在に配し、前記入力回転部材に一定方向の入力トルクが加えられたときに出力回転部材にトルクが伝達され、前記出力回転部材に逆入力トルクが加えられたときには、出力回転部材が空転して入力回転部材にトルクが伝達されないようにした逆入力遮断クラッチにおいて、前記入力回転部材と出力回転部材とを一定方向にトルク伝達可能に係合（ロック）させるロック手段と、前記入力回転部材に弾性連結された慣性体を有し、前記一定方向の入力トルクの供給が停止したときに、前記慣性体を惰走させて前記ロック手段による入力回転部材と出力回転部材との係合状態を解除し、その解除状態で前記慣性体を停止させるロック解除手段とを備えた構成を採用したのである。   In order to solve the above-mentioned problems, the present invention provides an input rotating member and an output rotating member that are freely rotatable about the same axis, and outputs when an input torque in a certain direction is applied to the input rotating member. In the reverse input shut-off clutch, in which the output rotating member idles and torque is not transmitted to the input rotating member when torque is transmitted to the rotating member and reverse input torque is applied to the output rotating member, the input rotating member A locking means for engaging (locking) the output rotating member in a fixed direction so that torque can be transmitted, and an inertia body elastically connected to the input rotating member, and the supply of the input torque in the fixed direction is stopped And a lock release means for releasing the engagement state between the input rotary member and the output rotary member by the lock means and stopping the inertia body in the released state. It was adopted the example was constructed.

上記の構成によれば、入力トルクの供給が停止したときに確実に入力回転部材と出力回転部材とのロック状態を解除し、ロック解除状態を維持することができるので、その後にいずれの方向の逆入力トルクが加えられても入力回転部材が共回りすることがない。   According to the above configuration, when the supply of input torque is stopped, the locked state between the input rotating member and the output rotating member can be reliably released and the unlocked state can be maintained. Even if reverse input torque is applied, the input rotating member does not rotate together.

ここで、前記ロック解除手段は、前記慣性体としてフライホイールを用い、このフライホイールと固定部材との間に、フライホイールを一定方向に空転させ、逆方向の回転に対しては固定部材と係合させて停止させる一方向クラッチを組み込んだものを採用するとよい。また、前記ロック手段には、ばねクラッチを採用するとよい。   Here, the lock release means uses a flywheel as the inertial body, and the flywheel idles in a fixed direction between the flywheel and the fixed member, and engages with the fixed member for rotation in the reverse direction. It is preferable to adopt a one-way clutch that is stopped by combining. Further, a spring clutch may be employed as the lock means.

前記ばねクラッチは、前記出力回転部材の外周にコイルばねを装着し、このコイルばねの一端部を前記入力回転部材に、他端部を前記フライホイールにそれぞれ係合させて、前記入力回転部材に一定方向の入力トルクが加えられたときに、前記コイルばねが出力回転部材を緊縛するようにしたものとすることができる。   The spring clutch has a coil spring mounted on the outer periphery of the output rotating member, and one end of the coil spring is engaged with the input rotating member and the other end is engaged with the flywheel. The coil spring may bind the output rotating member when an input torque in a certain direction is applied.

前記フライホイールおよび固定部材の具体的な組込構造は、前記固定部材を前記両回転部材と同軸に配される固定輪とし、前記フライホイールを、前記固定輪の外周に前記一方向クラッチを介して取り付けられるものとしたり、前記固定部材を前記両回転部材の軸心と平行に配される固定軸とし、この固定軸の外周に前記一方向クラッチを介して歯車を取り付けるとともに、前記フライホイールを、前記両回転部材と同軸に配され、その外周面に設けた歯で前記歯車と噛み合うものとしたりすることができる。   Specifically, the flywheel and the fixed member have a built-in structure in which the fixed member is a fixed wheel disposed coaxially with the two rotating members, and the flywheel is disposed on the outer periphery of the fixed wheel via the one-way clutch. And the fixed member is a fixed shaft that is arranged in parallel with the axis of the two rotating members, and a gear is attached to the outer periphery of the fixed shaft via the one-way clutch, and the flywheel is Further, it can be arranged coaxially with the two rotating members and meshed with the gears with teeth provided on the outer peripheral surface thereof.

あるいは、前記固定部材を前記両回転部材の軸心と平行に配される固定軸とし、この固定軸の外周に前記一方向クラッチを介して前記フライホイールを取り付けるとともに、前記両回転部材と同一軸心のまわりに回転自在に配され、前記コイルばねの他端部と係合する中間回転部材を設け、この中間回転部材と前記フライホイールに無端ベルトを巻き掛けて、中間回転部材とフライホイールとの間で回転が伝達されるようにすることもできる。   Alternatively, the fixed member is a fixed shaft arranged in parallel with the axis of the two rotating members, and the flywheel is attached to the outer periphery of the fixed shaft via the one-way clutch, and the same shaft as the two rotating members. An intermediate rotating member that is rotatably arranged around the center and engages with the other end of the coil spring is provided. An endless belt is wound around the intermediate rotating member and the flywheel, and the intermediate rotating member and the flywheel Rotation can be transmitted between the two.

一方、前記入出力回転部材の具体的な組込構造は、前記入力回転部材を、前記出力回転部材を構成する出力軸の外周に回転自在に嵌め込んだり、前記入力回転部材および出力回転部材を、固定された中心軸の外周にそれぞれ回転自在に嵌め込まれる入力回転スリーブおよび出力回転スリーブを備えたものとしたりすることができる。   On the other hand, the specific built-in structure of the input / output rotating member is such that the input rotating member is rotatably fitted on the outer periphery of the output shaft constituting the output rotating member, or the input rotating member and the output rotating member are Further, an input rotation sleeve and an output rotation sleeve that are rotatably fitted to the outer periphery of the fixed central shaft can be provided.

また、前記出力回転部材を、固定された中心軸の外周に回転自在に嵌め込まれる出力回転スリーブを備えたものとし、この出力回転スリーブの外周に前記入力回転部材を回転自在に嵌め込むとともに、前記中心軸の外周に前記一方向クラッチを介して前記フライホイールを取り付けるようにしてもよい。   Further, the output rotating member is provided with an output rotating sleeve that is rotatably fitted to the outer periphery of a fixed central shaft, and the input rotating member is rotatably fitted to the outer periphery of the output rotating sleeve, and The flywheel may be attached to the outer periphery of the central shaft via the one-way clutch.

前記ばねクラッチは、上記と別の構成として、軸方向中央に形成されたＵ字状部の両側の部分が互いに逆巻きとされたコイルばねを前記出力回転部材の外周に装着し、このコイルばねのＵ字状部を前記入力回転部材に係合させ、両端部を前記フライホイールに連結された制御部材に係合させて、前記入力回転部材に一定方向の入力トルクが加えられたときに、前記コイルばねが出力回転部材を緊縛するようにしたものを採用することもできる。   The spring clutch has a configuration different from the above, and a coil spring in which both sides of the U-shaped portion formed in the center in the axial direction are wound in reverse is mounted on the outer periphery of the output rotating member. When the input torque in a certain direction is applied to the input rotation member by engaging the U-shaped portion with the input rotation member and engaging both ends with a control member connected to the flywheel, A coil spring that binds the output rotating member can also be employed.

ここで、前記制御部材は、前記入力回転部材とコイルばねの径方向の隙間に配される円筒体であり、その中央部に前記コイルばねのＵ字状部と係合する入力回転部材の係合部を通す窓があけられている場合、この窓の位置で軸方向に２分割して、容易に組み込めるようにすることが望ましい。   Here, the control member is a cylindrical body arranged in a radial gap between the input rotation member and the coil spring, and an engagement of the input rotation member that engages with the U-shaped portion of the coil spring at the center thereof. When a window through which the joint portion passes is opened, it is desirable that the window is divided into two in the axial direction so that it can be easily assembled.

また、前記ばねクラッチのさらに別の構成として、巻き方向が同一の小径部と大径部とを内外に配してその一端どうしを連結した２重巻のコイルばねを、その小径部で前記出力回転部材の外周に装着し、前記入力回転部材を前記コイルばねの大径部と径方向で対向させ、前記コイルばねの大径部の他端部を前記入力回転部材に係合させ、小径部の他端部を前記フライホイールに係合させて、前記入力回転部材に一定方向の入力トルクが加えられたときに、前記コイルばねの大径部が入力回転部材を緊縛し、小径部が出力回転部材を緊縛するようにしたものを採用してもよい。   Further, as another configuration of the spring clutch, a double-wound coil spring in which a small diameter portion and a large diameter portion having the same winding direction are arranged inside and outside and their one ends are connected to each other is output at the small diameter portion. Mounted on the outer periphery of the rotating member, the input rotating member is opposed to the large diameter portion of the coil spring in the radial direction, the other end portion of the large diameter portion of the coil spring is engaged with the input rotating member, and the small diameter portion When the input rotary member is engaged with the flywheel and an input torque in a certain direction is applied to the input rotary member, the large-diameter portion of the coil spring binds the input rotary member and the small-diameter portion outputs You may employ | adopt the thing which bound the rotation member.

本発明の逆入力遮断クラッチは、上述したように、一定方向の入力トルクの供給が停止したときに、入力回転部材に弾性連結された慣性体を惰走させて入力回転部材と出力回転部材とのロック状態を解除し、ロック解除状態で慣性体を停止させることにより、ロック解除状態を維持できるようにしたものであるから、その後にいずれの方向の逆入力トルクが加えられても入力回転部材が共回りすることがなく、安定した逆入力遮断動作が得られる。   As described above, the reverse input cut-off clutch of the present invention, when the supply of input torque in a certain direction is stopped, causes the inertial body elastically connected to the input rotation member to straddle the input rotation member, the output rotation member, Since the unlocked state is released and the inertial body is stopped in the unlocked state so that the unlocked state can be maintained, the input rotating member can be applied no matter which direction of reverse input torque is applied thereafter. Therefore, a stable reverse input blocking operation can be obtained.

第１実施形態の逆入力遮断クラッチの縦断正面図Longitudinal front view of the reverse input cutoff clutch of the first embodiment 図１の逆入力遮断クラッチの要部の分解斜視図The disassembled perspective view of the principal part of the reverse input interruption | blocking clutch of FIG. ａ、ｂ、ｃは、それぞれ図１のIIIａ−IIIａ線、IIIｂ−IIIｂ線、IIIｃ−IIIｃ線に沿った断面図a, b, and c are sectional views taken along lines IIIa-IIIa, IIIb-IIIb, and IIIc-IIIc in FIG. 1, respectively. ａ〜ｄは、それぞれ図１の逆入力遮断クラッチの動作の説明図a to d are explanatory diagrams of the operation of the reverse input cutoff clutch of FIG. 第２実施形態の逆入力遮断クラッチの縦断正面図Longitudinal front view of the reverse input cutoff clutch of the second embodiment 第３実施形態の逆入力遮断クラッチの縦断正面図Vertical front view of the reverse input cutoff clutch of the third embodiment 第４実施形態の逆入力遮断クラッチの縦断正面図Vertical front view of the reverse input cutoff clutch of the fourth embodiment 第５実施形態の逆入力遮断クラッチの縦断正面図Longitudinal front view of the reverse input cutoff clutch of the fifth embodiment 図８の逆入力遮断クラッチの要部の分解斜視図The disassembled perspective view of the principal part of the reverse input interruption | blocking clutch of FIG. 第６実施形態の逆入力遮断クラッチの縦断正面図Longitudinal front view of the reverse input cutoff clutch of the sixth embodiment 図１０の逆入力遮断クラッチの要部の分解斜視図The disassembled perspective view of the principal part of the reverse input interruption | blocking clutch of FIG. ａ、ｂは、それぞれ図１０のXIIａ−XIIａ線、XIIｂ−XIIｂ線に沿った断面図a and b are sectional views taken along lines XIIa-XIIa and XIIb-XIIb in FIG. 10, respectively. 第７実施形態の逆入力遮断クラッチの縦断正面図Longitudinal front view of reverse input cutoff clutch of seventh embodiment ａは図１３のコイルばねの斜視図、ｂはａの矢印Ａ方向から見た側面図a is a perspective view of the coil spring of FIG. 13, b is a side view seen from the direction of arrow A of a ａ〜ｃは、それぞれ図１３の逆入力遮断クラッチのXV−XV線に沿った断面での動作説明図FIGS. 13A to 13C are operation explanatory views in a section taken along line XV-XV of the reverse input cutoff clutch of FIG. 第８実施形態の逆入力遮断クラッチの縦断正面図Longitudinal front view of the reverse input cutoff clutch of the eighth embodiment ａ、ｂは、それぞれ図１６のコイルばねのフック側およびその反対側から見た側面図a and b are side views of the coil spring of FIG. 16 viewed from the hook side and the opposite side, respectively.

以下、図面に基づき本発明の実施形態を説明する。図１乃至図４は第１の実施形態を示す。この逆入力遮断クラッチは、図１および図２に示すように、入力歯車（入力回転部材）１と、出力軸２に出力歯車３を取り付けた出力回転部材４と、出力軸２の外周に装着されるコイルばね５と、コイルばね５で入力歯車１に連結されるフライホイール（慣性体）６と、出力軸２を回転自在に支持する固定輪（固定部材）７と、フライホイール６と固定輪７との間に組み込まれる一方向クラッチ８とで基本的に構成されている。その入力歯車１は、外部のモータ９から駆動歯車１０を介して一定方向の入力トルクが加えられるようになっている。また、入力歯車１および出力回転部材４と同軸に配される固定輪７は、その一端のフランジ部７ａで出力軸２を通すハウジング１１に固定されている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment. As shown in FIGS. 1 and 2, the reverse input cutoff clutch is mounted on an input gear (input rotating member) 1, an output rotating member 4 having an output gear 3 attached to an output shaft 2, and an outer periphery of the output shaft 2. Coiled spring 5, flywheel (inertial body) 6 coupled to input gear 1 by coil spring 5, fixed ring (fixed member) 7 that rotatably supports output shaft 2, and flywheel 6 fixed A one-way clutch 8 incorporated between the wheel 7 and the wheel 7 is basically configured. The input gear 1 is applied with an input torque in a certain direction from an external motor 9 via a drive gear 10. A fixed ring 7 arranged coaxially with the input gear 1 and the output rotating member 4 is fixed to a housing 11 through which the output shaft 2 passes through a flange portion 7a at one end thereof.

前記入力歯車１とフライホイール６とは、互いに対向する側の内周に形成されたばね収納部１ａ、６ａにコイルばね５を収納する状態で、出力軸２の外周に回転自在に嵌め込まれている。   The input gear 1 and the flywheel 6 are rotatably fitted on the outer periphery of the output shaft 2 in a state in which the coil spring 5 is housed in the spring housing portions 1a and 6a formed on the inner circumferences on the opposite sides. .

前記コイルばね５は、図３（ａ）、（ｂ）にも示すように、一端のフック部５ａが入力歯車１のばね収納部１ａに設けられた係合溝１ｂに挿入され、他端のフック部５ｂがフライホイール６のばね収納部６ａに設けられた係合溝６ｂに挿入されている。そして、入力歯車１に一定方向（図３（ａ）中の矢印方向）の入力トルクが加えられたときに入力歯車１およびフライホイール６と係合して縮径し、出力軸２を緊縛するようになっている。これにより、入力歯車１と出力回転部材４とを一定方向にトルク伝達可能に係合（ロック）させるロック手段としてのばねクラッチが構成されている。   As shown in FIGS. 3A and 3B, the coil spring 5 has a hook portion 5a at one end inserted into an engagement groove 1b provided in the spring accommodating portion 1a of the input gear 1, and the other end. The hook portion 5b is inserted into an engagement groove 6b provided in the spring housing portion 6a of the flywheel 6. When an input torque in a certain direction (the arrow direction in FIG. 3A) is applied to the input gear 1, the input gear 1 and the flywheel 6 are engaged to reduce the diameter, and the output shaft 2 is bound. It is like that. Thus, a spring clutch is configured as a locking means that engages (locks) the input gear 1 and the output rotating member 4 in a fixed direction so that torque can be transmitted.

また、前記フライホイール６と固定輪７との間には、前述のように一方向クラッチ８が組み込まれている。言い換えれば、フライホイール６が一方向クラッチ８を介して固定輪７の外周に取り付けられている。   A one-way clutch 8 is incorporated between the flywheel 6 and the fixed wheel 7 as described above. In other words, the flywheel 6 is attached to the outer periphery of the fixed wheel 7 via the one-way clutch 8.

前記一方向クラッチ８は、図３（ｃ）に示すように、フライホイール６と一体回転する外輪１２の内周面に複数のポケット１３を設け、各ポケット１３の底側に傾斜カム面１３ａを形成し、各ポケット１３にころ１４ところ１４をポケット１３の狭小側へ付勢する板ばね１５を１つずつ組み込んだものである。そして、フライホイール６が一定方向（図中の矢印方向）に回転するときは、ころ１４が外輪１２のポケット１３の広大側へ相対移動してフリー状態となることにより、フライホイール６とともに回転し、フライホイール６が逆方向に回転しようとすると、ころ１４が外輪１２のポケット１３の狭小側へ相対移動して傾斜カム面１３ａおよび固定輪７の外周面と係合することにより、フライホイール６とともに停止するようになっている。すなわち、この一方向クラッチ８は、フライホイール６を固定輪７に対して一定方向に空転させ、逆方向の回転に対しては固定輪７と係合させて停止させる作用がある。   As shown in FIG. 3 (c), the one-way clutch 8 is provided with a plurality of pockets 13 on the inner peripheral surface of the outer ring 12 that rotates integrally with the flywheel 6, and an inclined cam surface 13 a is provided on the bottom side of each pocket 13. Each of the pockets 13 is formed with a leaf spring 15 for urging the rollers 14 and 14 toward the narrow side of the pocket 13 one by one. When the flywheel 6 rotates in a certain direction (in the direction of the arrow in the figure), the roller 14 moves together with the flywheel 6 by moving relative to the wide side of the pocket 13 of the outer ring 12 to enter a free state. When the flywheel 6 tries to rotate in the reverse direction, the roller 14 moves relative to the narrow side of the pocket 13 of the outer ring 12 and engages with the inclined cam surface 13 a and the outer peripheral surface of the fixed ring 7. It comes to stop with. That is, the one-way clutch 8 has an action of causing the flywheel 6 to idle in a fixed direction with respect to the fixed wheel 7 and engaging with the fixed wheel 7 to stop rotation in the reverse direction.

次に、この逆入力遮断クラッチの動作について説明する。まず、入力歯車１に一定方向の入力トルクが加えられると、前述のように、ばねクラッチの作用によりコイルばね５が縮径して出力軸２を緊縛し、出力回転部材４が回転駆動される。このとき、コイルばね５と係合するフライホイール６も一方向クラッチ８の作用により一定方向に空転する。   Next, the operation of the reverse input cutoff clutch will be described. First, when an input torque in a certain direction is applied to the input gear 1, the coil spring 5 is contracted by the action of the spring clutch to bind the output shaft 2 and rotate the output rotating member 4 as described above. . At this time, the flywheel 6 that engages with the coil spring 5 also idles in a certain direction by the action of the one-way clutch 8.

上記の入力トルクの供給が停止すると、図４（ａ）、（ｂ）に示すように、出力軸２（出力回転部材４）も停止するが、フライホイール６は入力歯車１にコイルばね５で弾性連結されており、一方向クラッチ８は引き続きフライホイール６を空転させる状態にあるため、フライホイール６が慣性力により惰走してコイルばね５を拡径させる。これにより、ばねクラッチによる入力歯車１と出力回転部材４とのロック状態が解除される。その後、フライホイール６は拡径したコイルばね５の弾性力を受けて一旦停止する。   When the supply of the input torque is stopped, as shown in FIGS. 4A and 4B, the output shaft 2 (the output rotating member 4) is also stopped, but the flywheel 6 is connected to the input gear 1 by the coil spring 5. Since the one-way clutch 8 is still in a state of idling the flywheel 6 because it is elastically connected, the flywheel 6 coasts due to the inertial force and expands the diameter of the coil spring 5. Thereby, the locked state of the input gear 1 and the output rotation member 4 by a spring clutch is cancelled | released. Thereafter, the flywheel 6 is temporarily stopped by receiving the elastic force of the coil spring 5 whose diameter has been expanded.

そして、図４（ｃ）、（ｄ）に示すように、一旦停止したフライホイール６は、コイルばね５の弾性回復により入力トルクと逆の方向へわずかに回転するが、その直後に一方向クラッチ８の作用により固定輪７と係合して停止する。このとき、コイルばね５は図４（ａ）の状態よりもわずかに縮径するが、予めコイルばね５の剛性や入力歯車１の回転数に応じてフライホイール６の重量や径方向寸法を適切に設定して、コイルばね５が出力軸２を緊縛するまでに停止するように調整しておくことにより、ロック解除状態を維持することができる。従って、この後に出力歯車３に逆入力トルクが加えられても、出力回転部材４は逆入力トルクの方向によらず空転し、入力歯車１が共回りすることはない。   4 (c) and 4 (d), the once stopped flywheel 6 slightly rotates in the direction opposite to the input torque due to the elastic recovery of the coil spring 5, but immediately after that, the one-way clutch 8 is engaged with the fixed ring 7 and stopped. At this time, the coil spring 5 has a slightly smaller diameter than the state of FIG. 4A, but the weight and radial dimension of the flywheel 6 are appropriately set in advance according to the rigidity of the coil spring 5 and the rotational speed of the input gear 1. And the unlocking state can be maintained by adjusting the coil spring 5 to stop before the output shaft 2 is bound. Therefore, even if a reverse input torque is applied to the output gear 3 thereafter, the output rotating member 4 idles regardless of the direction of the reverse input torque, and the input gear 1 does not rotate together.

この逆入力遮断クラッチは、上述したように、入力歯車１への一定方向の入力トルクの供給が停止したときに、入力歯車１に弾性連結したフライホイール６を惰走させて、ばねクラッチによるロック状態を解除し、ロック解除状態でフライホイール６を停止させるロック解除手段を設けて、ロック解除状態を維持できるようにしたので、入力トルク供給停止後にいずれの方向の逆入力トルクを加えられても入力歯車１が共回りせず、安定した逆入力遮断動作が得られる。   As described above, when the supply of input torque in a certain direction to the input gear 1 is stopped, the reverse input cutoff clutch causes the flywheel 6 elastically connected to the input gear 1 to coast and lock by the spring clutch. Since the unlocking means for releasing the state and stopping the flywheel 6 in the unlocked state is provided so that the unlocked state can be maintained, the reverse input torque in any direction can be applied after the input torque supply is stopped. The input gear 1 does not rotate together, and a stable reverse input blocking operation is obtained.

また、入力歯車１から出力回転部材４へのトルク伝達にばねクラッチを用いているので、そのばねクラッチのコイルばね５を交換するだけで伝達トルクの大きさを変更できるという利点もある。   Further, since the spring clutch is used for torque transmission from the input gear 1 to the output rotating member 4, there is also an advantage that the magnitude of the transmission torque can be changed only by replacing the coil spring 5 of the spring clutch.

なお、上述した第１の実施形態では入力歯車１を出力軸２の外周に回転自在に嵌め込んだが、出力軸２と同径の入力軸をコイルばね５の中央位置で出力軸２と軸方向に対向するように配して、この入力軸の外周に入力歯車１を一体回転するように嵌め込んでもよい。また、フライホイール６の逆回転を止める一方向クラッチは、実施形態のころ式のものに代えてばねクラッチを使用することにより、コストの低減を図ることができる。   In the first embodiment described above, the input gear 1 is rotatably fitted on the outer periphery of the output shaft 2, but the input shaft having the same diameter as the output shaft 2 is axially aligned with the output shaft 2 at the center position of the coil spring 5. The input gear 1 may be fitted on the outer periphery of the input shaft so as to rotate integrally therewith. In addition, the one-way clutch that stops the reverse rotation of the flywheel 6 can reduce the cost by using a spring clutch instead of the roller type of the embodiment.

図５乃至図１５に示す第２乃至第７の実施形態は、それぞれ第１実施形態に対して、フライホイールおよび固定部材の組込構造、入出力回転部材の組込構造、ばねクラッチの構成等を変更したもので、基本的な構成および動作は第１実施形態と同じである。従って、以下では、これらの各実施形態の第１実施形態と異なる部分について説明する。   The second to seventh embodiments shown in FIG. 5 to FIG. 15 are the flywheel and fixed member built-in structure, the input / output rotating member built-in structure, the spring clutch configuration, and the like, respectively, with respect to the first embodiment. The basic configuration and operation are the same as those in the first embodiment. Therefore, below, a different part from 1st Embodiment of these each embodiment is demonstrated.

図５に示す第２の実施形態は、第１実施形態の固定輪７に代わる固定部材として、フライホイール６の外側でハウジング１１に固定される固定軸１６を、入力歯車１および出力回転部材４の軸心と平行に設け、この固定軸１６の外周に一方向クラッチ８を介して歯車１７を取り付けるとともに、フライホイール６をその外周面に設けた歯６ｃで歯車１７と噛み合うものとしている。   In the second embodiment shown in FIG. 5, the fixed shaft 16 fixed to the housing 11 outside the flywheel 6 is replaced with the input gear 1 and the output rotating member 4 as a fixing member that replaces the fixed wheel 7 of the first embodiment. A gear 17 is attached to the outer periphery of the fixed shaft 16 via a one-way clutch 8, and the flywheel 6 is engaged with the gear 17 by teeth 6c provided on the outer peripheral surface thereof.

図６に示す第３の実施形態は、第２実施形態と同様に固定軸１６を設けるとともに、第１実施形態のフライホイール６を、固定軸１６の外周に一方向クラッチ８を介して取り付けられるフライホイール１８と、出力軸２の外周に回転自在に嵌め込まれ、コイルばね５の他端のフック部５ｂと係合する中間回転部材１９とに分割し、その中間回転部材１９とフライホイール１８の一側に設けたプーリ部１８ａに無端ベルト２０を巻き掛けて、中間回転部材１９とフライホイール１８との間で回転が伝達されるようにしたものである。   In the third embodiment shown in FIG. 6, the fixed shaft 16 is provided as in the second embodiment, and the flywheel 6 of the first embodiment is attached to the outer periphery of the fixed shaft 16 via the one-way clutch 8. The flywheel 18 is divided into an intermediate rotation member 19 that is rotatably fitted to the outer periphery of the output shaft 2 and engages with the hook portion 5b at the other end of the coil spring 5, and the intermediate rotation member 19 and the flywheel 18 are separated. An endless belt 20 is wound around a pulley portion 18 a provided on one side so that rotation is transmitted between the intermediate rotating member 19 and the flywheel 18.

図７に示す第４の実施形態は、第１実施形態の出力軸２の代わりに、固定された中心軸２１を逆入力遮断クラッチの中心に配し、この中心軸２１の外周に回転自在に嵌め込まれる入力回転スリーブ２２と、入力回転スリーブ２２と一体回転する入力歯車２３とで入力回転部材を構成し、中心軸２１の外周に回転自在に嵌め込まれる出力回転スリーブ２４と、出力回転スリーブ２４と一体回転する出力歯車２５とで出力回転部材を構成している。その入力回転スリーブ２２と出力回転スリーブ２４は、コイルばね５の中央位置で軸方向に対向するように配されている。また、フライホイール６は出力回転スリーブ２４の外周に回転自在に嵌め込まれ、固定輪７は出力回転スリーブ２４の外周を回転自在に支持するようになっている。   In the fourth embodiment shown in FIG. 7, instead of the output shaft 2 of the first embodiment, a fixed central shaft 21 is arranged at the center of the reverse input cutoff clutch, and is rotatable around the outer periphery of the central shaft 21. The input rotation sleeve 22 to be fitted and the input gear 23 that rotates integrally with the input rotation sleeve 22 constitute an input rotation member, and an output rotation sleeve 24 that is rotatably fitted to the outer periphery of the central shaft 21, and an output rotation sleeve 24. An output rotating member is constituted by the output gear 25 that rotates integrally. The input rotary sleeve 22 and the output rotary sleeve 24 are arranged so as to face each other in the axial direction at the center position of the coil spring 5. The flywheel 6 is rotatably fitted on the outer periphery of the output rotation sleeve 24, and the fixed ring 7 is configured to rotatably support the outer periphery of the output rotation sleeve 24.

図８および図９に示す第５の実施形態は、第４実施形態と同様に中心軸２１を設けるとともに、中心軸２１の外周に回転自在に嵌め込まれる出力回転スリーブ２４と、出力回転スリーブ２４と一体回転する出力歯車２５とで出力回転部材を構成している。そして、入力回転部材としての入力歯車２６が、出力回転スリーブ２４の外周に回転自在に嵌め込まれている。また、フライホイール２７は中心軸２１の外周に一方向クラッチ８を介して取り付けられており、第１実施形態の固定輪７は不要とされている。なお、この実施形態では、出力歯車２５が入力歯車２６と軸方向で隣接する位置に配され、中心軸２１の一端にはフライホイール２７を抜け止めするフランジ２１ａが設けられている。   The fifth embodiment shown in FIGS. 8 and 9 is provided with a center shaft 21 as in the fourth embodiment, and an output rotation sleeve 24 that is rotatably fitted on the outer periphery of the center shaft 21, and an output rotation sleeve 24. An output rotating member is constituted by the output gear 25 that rotates integrally. An input gear 26 as an input rotating member is rotatably fitted on the outer periphery of the output rotating sleeve 24. Moreover, the flywheel 27 is attached to the outer periphery of the center shaft 21 via the one-way clutch 8, and the fixed ring 7 of the first embodiment is not necessary. In this embodiment, the output gear 25 is disposed at a position adjacent to the input gear 26 in the axial direction, and a flange 21 a that prevents the flywheel 27 from being detached is provided at one end of the center shaft 21.

図１０乃至図１２（ａ）、（ｂ）に示す第６の実施形態は、上述した第５実施形態をベースとし、第１乃至第５の実施形態のコイルばね５に代えて、軸方向中央に形成されたＵ字状部２８ａの両側の部分が互いに逆巻きとされたコイルばね２８（図１１参照）を用いて、ばねクラッチの構成を変更したものである。   The sixth embodiment shown in FIGS. 10 to 12 (a) and 12 (b) is based on the fifth embodiment described above, and instead of the coil spring 5 of the first to fifth embodiments, the center in the axial direction is used. The structure of the spring clutch is changed by using a coil spring 28 (see FIG. 11) in which both side portions of the U-shaped portion 28a formed in the above are reversely wound with each other.

この実施形態のばねクラッチは、前記Ｕ字状部２８ａを有するコイルばね２８を出力回転スリーブ２４の外周に装着し、そのＵ字状部２８ａを入力歯車２９の内周に設けた係合突起２９ａ、２９ｂに係合させ、両端部をフライホイール３０に連結された制御部材３１に係合させたものである。入力歯車２９は、その両端部の内周に取り付けられた蓋３２を介して、制御部材３１の外周に回転自在に嵌め込まれている。   In the spring clutch of this embodiment, a coil spring 28 having the U-shaped portion 28 a is mounted on the outer periphery of the output rotating sleeve 24, and the U-shaped portion 28 a is provided on the inner periphery of the input gear 29. , 29b and both ends are engaged with a control member 31 connected to the flywheel 30. The input gear 29 is rotatably fitted to the outer periphery of the control member 31 via the lids 32 attached to the inner periphery of both ends.

前記制御部材３１は、入力歯車２９とコイルばね２８の径方向の隙間に配される円筒体で、出力回転スリーブ２４の外周に回転自在に嵌め込まれている。その中央部には入力歯車２９の内周面に形成された２つの係合突起（係合部）２９ａ、２９ｂを通す窓３１ａがあけられており、容易に組み込めるように窓３１ａの位置で軸方向に２分割されている。また、その窓３１ａから軸方向両側に延びる係合溝３１ｂが設けられ、各係合溝３１ｂにそれぞれコイルばね２８の両端のフック部２８ｂが挿入されるようになっている。そして、フライホイール３０と対向する側の端部に設けた凹部３１ｃに、フライホイール３０の端面に設けた凸部３０ａが嵌め込まれて、フライホイール３０と一体回転するように連結されている。   The control member 31 is a cylindrical body disposed in a radial gap between the input gear 29 and the coil spring 28 and is rotatably fitted on the outer periphery of the output rotation sleeve 24. A window 31a through which two engagement protrusions (engagement portions) 29a and 29b formed on the inner peripheral surface of the input gear 29 pass is opened at the center, and the shaft 31a is positioned at the position of the window 31a so that it can be easily assembled. Divided into two in the direction. Further, engagement grooves 31b extending from the window 31a to both sides in the axial direction are provided, and hook portions 28b at both ends of the coil spring 28 are inserted into the respective engagement grooves 31b. And the convex part 30a provided in the end surface of the flywheel 30 is engage | inserted by the recessed part 31c provided in the edge part on the side facing the flywheel 30, and it is connected so that it may rotate with the flywheel 30 integrally.

従って、入力歯車２９に一定方向の入力トルクが加えられると、コイルばね２８のＵ字状部２８ａが入力歯車２９の一方の係合突起２９ａに押され、Ｕ字状部２８ａの両側部分がいずれも縮径して出力回転スリーブ２４を緊縛することにより、出力回転スリーブ２４が出力歯車２５と一体に回転する。このとき、入力歯車２９の回転がコイルばね２８および制御部材３１を介してフライホイール３０にも伝達され、フライホイール３０が空転する。   Therefore, when an input torque in a certain direction is applied to the input gear 29, the U-shaped portion 28a of the coil spring 28 is pushed by one engaging protrusion 29a of the input gear 29, and both side portions of the U-shaped portion 28a are The output rotation sleeve 24 rotates integrally with the output gear 25 by reducing the diameter and binding the output rotation sleeve 24. At this time, the rotation of the input gear 29 is also transmitted to the flywheel 30 via the coil spring 28 and the control member 31, and the flywheel 30 rotates idle.

そして、入力トルクの供給が停止すると、フライホイール３０が制御部材３１とともに惰走し、制御部材３１がコイルばね２８の両端のフック部２８ｂを押すことにより、コイルばね２８のＵ字状部２８ａが入力歯車２９の他方の係合突起２９ｂに当接し、Ｕ字状部２８ａの両側部分が拡径して、ばねクラッチによるロック状態が解除される。   When the supply of the input torque is stopped, the flywheel 30 coasts with the control member 31 and the control member 31 pushes the hook portions 28b at both ends of the coil spring 28, whereby the U-shaped portion 28a of the coil spring 28 is Abutting against the other engagement protrusion 29b of the input gear 29, both side portions of the U-shaped portion 28a are expanded in diameter, and the locked state by the spring clutch is released.

すなわち、この実施形態では、フライホイール３０が制御部材３１を介して第１実施形態のフライホイール６の役割を果たすようになっている。従って、上記のようにロック状態が解除された後も、第１実施形態で説明したのと同様の動作により、ロック解除状態が維持される。   That is, in this embodiment, the flywheel 30 plays a role of the flywheel 6 of the first embodiment via the control member 31. Therefore, even after the locked state is released as described above, the unlocked state is maintained by the same operation as described in the first embodiment.

また、図１３乃至図１５に示す第７の実施形態は、第６実施形態と同様に第５実施形態をベースとし、巻き方向が同一の小径部３３ａと大径部３３ｂとを内外に配してその一端どうしを連結した２重巻のコイルばね３３（図１４（ａ）、（ｂ）参照）を用いて、ばねクラッチの構成を変更したものである。   In addition, the seventh embodiment shown in FIGS. 13 to 15 is based on the fifth embodiment as in the sixth embodiment, and the small diameter portion 33a and the large diameter portion 33b having the same winding direction are arranged inside and outside. The configuration of the spring clutch is changed using a double-winding coil spring 33 (see FIGS. 14A and 14B) in which one ends of the levers are connected.

この実施形態のばねクラッチは、前記２重巻のコイルばね３３をその小径部３３ａで出力回転スリーブ２４の外周に装着し、入力歯車３４をコイルばね３３の大径部３３ｂと径方向で対向させ、コイルばね３３の大径部３３ｂの他端のフック部３３ｄを入力歯車３４に係合させ、小径部３３ａの他端のフック部３３ｃをフライホイール３５に係合させたものである。   In the spring clutch of this embodiment, the double-winding coil spring 33 is mounted on the outer periphery of the output rotation sleeve 24 with its small diameter portion 33a, and the input gear 34 is opposed to the large diameter portion 33b of the coil spring 33 in the radial direction. The hook portion 33d at the other end of the large-diameter portion 33b of the coil spring 33 is engaged with the input gear 34, and the hook portion 33c at the other end of the small-diameter portion 33a is engaged with the flywheel 35.

この実施形態では、入力歯車３４に一定方向の入力トルクが加えられると、図１５（ａ）に示すように、コイルばね３３の大径部３３ｂが拡径して入力歯車３４を緊縛し、小径部３３ａが縮径して出力回転スリーブ２４を緊縛することにより、出力回転スリーブ２４が出力歯車２５と一体に回転し、フライホイール３５は空転する。このとき、入力歯車３４からはコイルばね３３の大径部３３ｂ全体に対してトルク伝達が行われるので、過大な入力トルクが加えられたときもコイルばね３３の破損が生じにくい。   In this embodiment, when an input torque in a certain direction is applied to the input gear 34, as shown in FIG. 15 (a), the large diameter portion 33b of the coil spring 33 expands to tightly bind the input gear 34, thereby reducing the small diameter. When the diameter of the portion 33a is reduced to bind the output rotation sleeve 24, the output rotation sleeve 24 rotates integrally with the output gear 25, and the flywheel 35 rotates idle. At this time, torque is transmitted from the input gear 34 to the entire large-diameter portion 33b of the coil spring 33, so that the coil spring 33 is not easily damaged even when an excessive input torque is applied.

そして、入力トルクの供給が停止すると、図１５（ｂ）に示すように、フライホイール３５が惰走してコイルばね３３の小径側のフック部３３ｃを押すことにより、コイルばね３３の小径部３３ａが拡径してばねクラッチによるロック状態が解除される。なお、このとき、コイルばね３３の大径部３３ｂは縮径して入力歯車３４に対する緊縛も解かれる。   When the supply of the input torque is stopped, as shown in FIG. 15 (b), the flywheel 35 coasts and pushes the hook portion 33 c on the small diameter side of the coil spring 33, whereby the small diameter portion 33 a of the coil spring 33. The diameter is expanded and the locked state by the spring clutch is released. At this time, the large diameter portion 33b of the coil spring 33 is reduced in diameter so that the binding to the input gear 34 is also released.

その後、図１５（ｃ）に示すように、フライホイール３５がわずかに逆転して、コイルばね３３の小径部３３ａが拡径した状態で停止することにより、ロック解除状態が維持される点は、第１実施形態で説明した動作と同じである。   Thereafter, as shown in FIG. 15 (c), the flywheel 35 is slightly reversed, and the small diameter portion 33a of the coil spring 33 stops in an expanded state, whereby the unlocked state is maintained. The operation is the same as that described in the first embodiment.

図１６および図１７（ａ）、（ｂ）に示す第８の実施形態は、第７実施形態をベースとし、巻き方向が互いに逆の小径部３６ａと大径部３６ｂとを内外に配してその一端どうしを連結した２重巻のコイルばね３６と、内筒３７ａを有する二重筒構造の入力歯車３７を用いたものである。   The eighth embodiment shown in FIGS. 16 and 17 (a) and 17 (b) is based on the seventh embodiment, and has a small-diameter portion 36a and a large-diameter portion 36b whose winding directions are opposite to each other inside and outside. A double-coiled input gear 37 having a double-winding coil spring 36 having one end connected to each other and an inner cylinder 37a is used.

この実施形態では、前記２重巻のコイルばね３６をその小径部３６ａで出力回転スリーブ２４の外周に装着するとともに、その大径部３６ｂを入力歯車３７の内筒３７ａの外周面に近接対向させ、小径部３６ａの他端のフック部３６ｃをフライホイール３５に、大径部３６ｂの他端のフック部３６ｄを入力歯車３７にそれぞれ係合させている。なお、コイルばね３６の各フック部３６ｃ、３６ｄは、上述した各実施形態と異なり、軸方向に突出している。また、入力歯車３７は、コイルばね３６が挿入される開口を塞ぐ蓋３８を介して、出力回転スリーブ２４の外周に回転自在に嵌め込まれている。   In this embodiment, the double-winding coil spring 36 is mounted on the outer periphery of the output rotating sleeve 24 with its small diameter portion 36 a, and its large diameter portion 36 b is closely opposed to the outer peripheral surface of the inner cylinder 37 a of the input gear 37. The hook portion 36c at the other end of the small diameter portion 36a is engaged with the flywheel 35, and the hook portion 36d at the other end of the large diameter portion 36b is engaged with the input gear 37, respectively. In addition, unlike each embodiment mentioned above, each hook part 36c, 36d of the coil spring 36 protrudes in the axial direction. The input gear 37 is rotatably fitted on the outer periphery of the output rotation sleeve 24 via a lid 38 that closes an opening into which the coil spring 36 is inserted.

従って、入力歯車３７に一定方向の入力トルクが加えられると、コイルばね３６の大径部３６ｂと小径部３６ａがいずれも縮径して、入力歯車３７の内筒３７ａおよび出力回転スリーブ２４をそれぞれ緊縛し、入力トルクの供給が停止すると、コイルばね３６の小径部３６ａと大径部３６ｂがいずれも拡径して、ばねクラッチのロック状態が解除されるとともに入力歯車３７の内筒３７ａに対する緊縛も解かれる。   Therefore, when an input torque in a certain direction is applied to the input gear 37, both the large diameter portion 36b and the small diameter portion 36a of the coil spring 36 are reduced in diameter, and the inner cylinder 37a and the output rotary sleeve 24 of the input gear 37 are respectively connected. When the input torque supply is stopped, the small-diameter portion 36a and the large-diameter portion 36b of the coil spring 36 are expanded in diameter, the spring clutch is unlocked, and the input gear 37 is bound to the inner cylinder 37a. Is also solved.

すなわち、この実施形態と第７実施形態とでは、コイルばねが入力歯車を緊縛するとき、およびその緊縛が解かれるときの動作は異なっているが、その他の動作、および過大な入力トルクに対してもコイルばねの破損が生じにくい点は同じである。   That is, this embodiment and the seventh embodiment have different operations when the coil spring binds the input gear and when the binding is released, but other operations and excessive input torque are different. However, the coil spring is not easily damaged.

１、２３、２６、２９、３４、３７ 入力歯車
１ａ ばね収納部
１ｂ 係合溝
２ 出力軸
３、２５ 出力歯車
４ 出力回転部材
５、２８、３３、３６ コイルばね
５ａ、５ｂフック部
６、１８、２７、３０、３５ フライホイール
６ａ ばね収納部
６ｂ 係合溝
６ｃ 歯
７ 固定輪
８ 一方向クラッチ
１６ 固定軸
１７ 歯車
１９ 中間回転部材
２０ 無端ベルト
２１ 中心軸
２２ 入力回転スリーブ
２４ 出力回転スリーブ
２８ａ Ｕ字状部
２８ｂ フック部
２９ａ、２９ｂ 係合突起
３１ 制御部材
３１ａ 窓
３１ｂ 係合溝
３３ａ、３６ａ 小径部
３３ｂ、３６ｂ 大径部
３３ｃ、３３ｄ、３６ｃ、３６ｄ フック部
３７ａ 内筒 1, 23, 26, 29, 34, 37 Input gear 1a Spring accommodating portion 1b Engaging groove 2 Output shaft 3, 25 Output gear 4 Output rotating member 5, 28, 33, 36 Coil spring 5a, 5b Hook portions 6, 18 27, 30, 35 Flywheel 6a Spring accommodating portion 6b Engaging groove 6c Teeth 7 Fixed wheel 8 One-way clutch 16 Fixed shaft 17 Gear 19 Intermediate rotating member 20 Endless belt 21 Center shaft 22 Input rotating sleeve 24 Output rotating sleeve 28a U Character part 28b Hook part 29a, 29b Engagement protrusion 31 Control member 31a Window 31b Engagement groove 33a, 36a Small diameter part 33b, 36b Large diameter part 33c, 33d, 36c, 36d Hook part 37a Inner cylinder

Claims (13)

入力回転部材と出力回転部材とを同一軸心のまわりに回転自在に配し、前記入力回転部材に一定方向の入力トルクが加えられたときに出力回転部材にトルクが伝達され、前記出力回転部材に逆入力トルクが加えられたときには、出力回転部材が空転して入力回転部材にトルクが伝達されないようにした逆入力遮断クラッチにおいて、
前記入力回転部材と出力回転部材とを一定方向にトルク伝達可能に係合させるロック手段と、
前記入力回転部材に弾性連結された慣性体を有し、前記一定方向の入力トルクの供給が停止したときに、前記慣性体を惰走させて前記ロック手段による入力回転部材と出力回転部材との係合状態を解除し、その解除状態で前記慣性体を停止させるロック解除手段とを備えていることを特徴とする逆入力遮断クラッチ。 The input rotating member and the output rotating member are rotatably arranged around the same axis, and when an input torque in a certain direction is applied to the input rotating member, torque is transmitted to the output rotating member, and the output rotating member When a reverse input torque is applied to the reverse input shut-off clutch in which the output rotating member idles and torque is not transmitted to the input rotating member.
Lock means for engaging the input rotation member and the output rotation member in a fixed direction so as to transmit torque;
An inertial body elastically connected to the input rotation member, and when the supply of the input torque in the fixed direction is stopped, the inertial body is swung to connect the input rotation member and the output rotation member by the locking means. A reverse input cut-off clutch comprising: a lock release means for releasing the engaged state and stopping the inertial body in the released state. 前記ロック解除手段が、前記慣性体としてフライホイールを用い、このフライホイールと固定部材との間に、フライホイールを一定方向に空転させ、逆方向の回転に対しては固定部材と係合させて停止させる一方向クラッチを組み込んだものであることを特徴とする請求項１に記載の逆入力遮断クラッチ。   The unlocking means uses a flywheel as the inertial body, and the flywheel idles in a fixed direction between the flywheel and the fixed member, and engages with the fixed member for rotation in the reverse direction. The reverse input cutoff clutch according to claim 1, wherein a one-way clutch to be stopped is incorporated. 前記ロック手段がばねクラッチであることを特徴とする請求項２に記載の逆入力遮断クラッチ。   The reverse input cutoff clutch according to claim 2, wherein the locking means is a spring clutch. 前記ばねクラッチは、前記出力回転部材の外周にコイルばねを装着し、このコイルばねの一端部を前記入力回転部材に、他端部を前記フライホイールにそれぞれ係合させて、前記入力回転部材に一定方向の入力トルクが加えられたときに、前記コイルばねが出力回転部材を緊縛するようにしたものであることを特徴とする請求項３に記載の逆入力遮断クラッチ。   The spring clutch has a coil spring mounted on the outer periphery of the output rotating member, and one end of the coil spring is engaged with the input rotating member and the other end is engaged with the flywheel. 4. The reverse input cutoff clutch according to claim 3, wherein when the input torque in a certain direction is applied, the coil spring binds the output rotating member. 前記固定部材を前記両回転部材と同軸に配される固定輪とし、前記フライホイールは、前記固定輪の外周に前記一方向クラッチを介して取り付けられるものとしたことを特徴とする請求項４に記載の逆入力遮断クラッチ。   5. The fixed member according to claim 4, wherein the fixed member is a fixed wheel arranged coaxially with the rotating members, and the flywheel is attached to an outer periphery of the fixed wheel via the one-way clutch. The reverse input cutoff clutch as described. 前記固定部材を前記両回転部材の軸心と平行に配される固定軸とし、この固定軸の外周に前記一方向クラッチを介して歯車を取り付けるとともに、前記フライホイールは、前記両回転部材と同軸に配され、その外周面に設けた歯で前記歯車と噛み合うものとしたことを特徴とする請求項４に記載の逆入力遮断クラッチ。   The fixed member is a fixed shaft arranged in parallel with the axis of the two rotating members, and a gear is attached to the outer periphery of the fixed shaft via the one-way clutch, and the flywheel is coaxial with the two rotating members. The reverse input cutoff clutch according to claim 4, wherein the reverse input cutoff clutch is configured to mesh with the gear with teeth provided on an outer peripheral surface thereof. 前記固定部材を前記両回転部材の軸心と平行に配される固定軸とし、この固定軸の外周に前記一方向クラッチを介して前記フライホイールを取り付けるとともに、前記両回転部材と同一軸心のまわりに回転自在に配され、前記コイルばねの他端部と係合する中間回転部材を設け、この中間回転部材と前記フライホイールに無端ベルトを巻き掛けて、中間回転部材とフライホイールとの間で回転が伝達されるようにしたことを特徴とする請求項４に記載の逆入力遮断クラッチ。   The fixed member is a fixed shaft that is arranged in parallel with the axis of the two rotating members, and the flywheel is attached to the outer periphery of the fixed shaft via the one-way clutch, and the same axis as the two rotating members. An intermediate rotating member that is rotatably arranged around and is engaged with the other end of the coil spring is provided, and an endless belt is wound around the intermediate rotating member and the flywheel so that the intermediate rotating member and the flywheel are in between. 5. The reverse input cut-off clutch according to claim 4, wherein the rotation is transmitted at. 前記入力回転部材を、前記出力回転部材を構成する出力軸の外周に回転自在に嵌め込んだことを特徴とする請求項４乃至７のいずれかに記載の逆入力遮断クラッチ。   The reverse input cutoff clutch according to any one of claims 4 to 7, wherein the input rotation member is rotatably fitted on an outer periphery of an output shaft constituting the output rotation member. 前記入力回転部材および出力回転部材を、固定された中心軸の外周にそれぞれ回転自在に嵌め込まれる入力回転スリーブおよび出力回転スリーブを備えたものとしたことを特徴とする請求項４乃至７のいずれかに記載の逆入力遮断クラッチ。   8. The input rotating member and the output rotating member are each provided with an input rotating sleeve and an output rotating sleeve that are rotatably fitted to the outer periphery of a fixed central shaft, respectively. The reverse input cut-off clutch described in 1. 前記出力回転部材を、固定された中心軸の外周に回転自在に嵌め込まれる出力回転スリーブを備えたものとし、この出力回転スリーブの外周に前記入力回転部材を回転自在に嵌め込むとともに、前記中心軸の外周に前記一方向クラッチを介して前記フライホイールを取り付けたことを特徴とする請求項４に記載の逆入力遮断クラッチ。   The output rotating member includes an output rotating sleeve that is rotatably fitted to the outer periphery of a fixed central shaft, and the input rotating member is rotatably fitted to the outer periphery of the output rotating sleeve, and the central shaft The reverse input cutoff clutch according to claim 4, wherein the flywheel is attached to the outer periphery of the flywheel via the one-way clutch. 前記ばねクラッチは、軸方向中央に形成されたＵ字状部の両側の部分が互いに逆巻きとされたコイルばねを前記出力回転部材の外周に装着し、このコイルばねのＵ字状部を前記入力回転部材に係合させ、両端部を前記フライホイールに連結された制御部材に係合させて、前記入力回転部材に一定方向の入力トルクが加えられたときに、前記コイルばねが出力回転部材を緊縛するようにしたものであることを特徴とする請求項３に記載の逆入力遮断クラッチ。   In the spring clutch, a coil spring in which both sides of a U-shaped portion formed in the center in the axial direction are reversely wound is mounted on the outer periphery of the output rotating member, and the U-shaped portion of the coil spring is connected to the input When the input torque in a certain direction is applied to the input rotating member by engaging the rotating member and engaging both ends with a control member connected to the flywheel, the coil spring causes the output rotating member to 4. The reverse input cut-off clutch according to claim 3, wherein the reverse input cut-off clutch is tightly bound. 前記制御部材は、前記入力回転部材とコイルばねの径方向の隙間に配される円筒体であり、その中央部に前記コイルばねのＵ字状部と係合する入力回転部材の係合部を通す窓があけられ、この窓の位置で軸方向に２分割されていることを特徴とする請求項１１に記載の逆入力遮断クラッチ。   The control member is a cylindrical body arranged in a radial gap between the input rotating member and the coil spring, and an engaging portion of the input rotating member that engages with the U-shaped portion of the coil spring is provided at the center thereof. 12. The reverse input shut-off clutch according to claim 11, wherein a window for passing through is opened and divided into two in the axial direction at the position of the window. 前記ばねクラッチは、巻き方向が同一の小径部と大径部とを内外に配してその一端どうしを連結した２重巻のコイルばねを、その小径部で前記出力回転部材の外周に装着し、前記入力回転部材を前記コイルばねの大径部と径方向で対向させ、前記コイルばねの大径部の他端部を前記入力回転部材に係合させ、小径部の他端部を前記フライホイールに係合させて、前記入力回転部材に一定方向の入力トルクが加えられたときに、前記コイルばねの大径部が入力回転部材を緊縛し、小径部が出力回転部材を緊縛するようにしたものであることを特徴とする請求項３に記載の逆入力遮断クラッチ。   The spring clutch has a small-diameter portion and a large-diameter portion with the same winding direction arranged inside and outside, and a double-wound coil spring connected at one end thereof is mounted on the outer periphery of the output rotating member at the small-diameter portion. The input rotation member is opposed to the large diameter portion of the coil spring in the radial direction, the other end portion of the large diameter portion of the coil spring is engaged with the input rotation member, and the other end portion of the small diameter portion is engaged with the fly. When an input torque in a certain direction is applied to the input rotating member by engaging with a wheel, the large diameter portion of the coil spring binds the input rotating member, and the small diameter portion binds the output rotating member. The reverse input cutoff clutch according to claim 3, wherein
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CN104632919A (en) * 2014-12-12 2015-05-20 陈相贤 Emergency stop device installed in farming machine gearbox
WO2019049220A1 (en) * 2017-09-05 2019-03-14 株式会社Ｔｏｋ Reverse input lock clutch
JPWO2019049220A1 (en) * 2017-09-05 2020-08-06 株式会社Ｔｏｋ Reverse input lock clutch
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