JP4732200B2 - Rotation transmission device - Google Patents

Rotation transmission device Download PDF

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JP4732200B2
JP4732200B2 JP2006069482A JP2006069482A JP4732200B2 JP 4732200 B2 JP4732200 B2 JP 4732200B2 JP 2006069482 A JP2006069482 A JP 2006069482A JP 2006069482 A JP2006069482 A JP 2006069482A JP 4732200 B2 JP4732200 B2 JP 4732200B2
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armature
side member
cage
rotor
retaining ring
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JP2007247713A (en
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光司 佐藤
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NTN Corp
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NTN Corp
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Description

この発明は、動力伝達経路における動力の伝達と遮断の切換えに用いられる回転伝達装置に関するものである。   The present invention relates to a rotation transmission device used for switching between transmission and cutoff of power in a power transmission path.

この種の回転伝達装置として、特許文献１に記載されたものが従来から知られている。この回転伝達装置は、入力側部材としての内方部材の外側に出力側部材としての外方部材を設け、その内方部材と外方部材間に２方向クラッチを組込み、その２方向クラッチのオン、オフを電磁クラッチにより制御するようにしている。   As this type of rotation transmission device, one described in Patent Document 1 has been conventionally known. In this rotation transmission device, an outer member as an output member is provided outside an inner member as an input member, a two-way clutch is incorporated between the inner member and the outer member, and the two-way clutch is turned on. , OFF is controlled by an electromagnetic clutch.

ここで、２方向クラッチは、内方部材の外周に外方部材の内周に形成された円筒面との間でくさび形空間を形成するカム面を設け、そのカム面と円筒面との間に組込まれたローラを内方部材と外方部材間に組込まれた保持器で保持し、その保持器にスイッチばねのばね力を付与して、ローラがカム面および円筒面に対して係合解除される中立位置に保持器を弾性保持している。   Here, the two-way clutch is provided with a cam surface that forms a wedge-shaped space between the outer surface of the inner member and the cylindrical surface formed on the inner periphery of the outer member, and between the cam surface and the cylindrical surface. The roller built in is held by a cage assembled between the inner member and the outer member, and the spring force of the switch spring is applied to the cage so that the roller engages with the cam surface and the cylindrical surface. The cage is elastically held in the neutral position to be released.

一方、電磁クラッチは、電磁石の電磁コイルに対する通電により、保持器に対して回り止めされ、かつ軸方向に移動可能に支持されたアーマチュアを外方部材に回り止めされたロータに吸着して、保持器を外方部材に結合するようにしている。   The electromagnetic clutch, on the other hand, holds the armature that is prevented from rotating with respect to the cage by being energized to the electromagnetic coil of the electromagnet and that is supported so as to be movable in the axial direction to the rotor that is prevented from rotating around the outer member. The vessel is coupled to the outer member.

上記の構成から成る回転伝達装置において、電磁石の電磁コイルに対する通電によりロータにアーマチュアを吸着すると、その吸着面に作用する摩擦抵抗により、保持器が内方部材に対し相対回転し、ローラが円筒面およびカム面に係合して、内方部材の回転がローラを介して外方部材に伝達される。   In the rotation transmission device configured as described above, when the armature is attracted to the rotor by energizing the electromagnetic coil of the electromagnet, the cage rotates relative to the inner member by the frictional resistance acting on the attracting surface, and the roller is a cylindrical surface. The rotation of the inner member is transmitted to the outer member via the roller by engaging with the cam surface.

また、電磁石の電磁コイルに対する通電を解除すると、スイッチばねのばね力により保持器が中立位置に戻されて、ローラの円筒面およびカム面に対する係合が解除され、内方部材が空転する。   When energization of the electromagnetic coil of the electromagnet is released, the cage is returned to the neutral position by the spring force of the switch spring, the engagement of the roller with the cylindrical surface and the cam surface is released, and the inner member is idled.

ところで、上記従来の回転伝達装置においては、内方部材のみが高速で回転する空転時に、その内方部材と保持器に保持されたローラが共に回転し、ローラに作用する遠心力によりローラが半径方向外方に移動して外方部材の円筒面に接触し、その接触部に作用する引きずりトルクにより、内方部材と保持器が相対回転してローラがカム面および円筒面にミス係合するおそれがあり、改善すべき点が残されている。   By the way, in the conventional rotation transmission device, at the time of idling in which only the inner member rotates at a high speed, the inner member and the roller held by the cage rotate together, and the roller is radiused by the centrifugal force acting on the roller. The outer member and the cage are rotated relative to each other by the drag torque acting on the contact portion by moving outward in the direction, and the roller is misengaged with the cam surface and the cylindrical surface. There is a possibility that there is a point to be improved.

また、内方部材が空転する状態で急激に加減速されると、内方部材と弾性的に結合されている保持器、アーマチュアおよびローラの慣性力により、内方部材と保持器、アーマチュアおよびローラとが相対回転してローラがカム面および円筒面にミス係合するおそれがある。   In addition, when the inner member is idling and accelerated and decelerated suddenly, the inner member and the retainer, the armature and the roller are elastically coupled with the inner member by the inertial force of the retainer, the armature and the roller. May rotate relative to each other and the roller may be misengaged with the cam surface and the cylindrical surface.

そのような不都合を解消するため、特許文献２に記載された回転伝達装置においては、電磁石に対する通電の遮断状態で、アーマチュアに設けられた円筒部をスイッチばねの内側に嵌合させてスイッチばねの縮径を防止し、２方向クラッチがミス係合するのを防止するようにしている。
特開２００３−０９０３５６号公報 特開２００５−０８３５６０号公報 In order to eliminate such inconvenience, in the rotation transmission device described in Patent Document 2, the cylindrical portion provided in the armature is fitted to the inside of the switch spring in a state where the electromagnet is cut off, and the switch spring The diameter reduction is prevented and the two-way clutch is prevented from being misengaged.
JP 2003-090356 A Japanese Patent Laying-Open No. 2005-083560

ところで、特許文献２に記載された回転伝達装置においては、アーマチュアに
円筒部を形成する必要が有るため、コストがかかるという問題がある。また、通常、アーマチュアの摩擦面は摩擦抵抗を増加させるために表面に特殊な研削加工を施しており、この加工を施すためには、アーマチュアが平板である必要があり、上記のように、円筒部を有するアーマチュアでは加工を施すことができず、摩擦面の面粗さが確保できないため、摩擦抵抗が減少してロータとアーマチュアの接触面で滑りが生じ、２方向クラッチを係合させることができない可能性があった。 By the way, in the rotation transmission device described in Patent Document 2, since it is necessary to form a cylindrical portion in the armature, there is a problem that costs are increased. Also, the friction surface of the armature usually has a special grinding process on the surface to increase the frictional resistance. In order to perform this process, the armature needs to be a flat plate. Since the armature having a portion cannot be processed and the surface roughness of the friction surface cannot be secured, the frictional resistance is reduced and slippage occurs on the contact surface between the rotor and the armature, and the two-way clutch can be engaged. There was a possibility that it could not be done.

この発明の課題は、２方向クラッチのミス係合を防止することができると共に、アーマチュアの摩擦面に所定の面粗さが確保できるようにした信頼性の高い回転伝達装置を提供することである。   An object of the present invention is to provide a highly reliable rotation transmission device capable of preventing misengagement of a two-way clutch and ensuring a predetermined surface roughness on a friction surface of an armature. .

上記の課題を解決するために、この発明においては、入力側部材とその外側に設けられた出力側部材の相互間に、その両部材の相互間で回転トルクの伝達と遮断とを行なう２方向クラッチと、その２方向クラッチの係合および係合解除を制御する電磁クラッチとを組込み、前記２方向クラッチが、入力側部材と出力側部材間に組込まれた保持器と、その保持器に保持され、前記入力側部材に対する保持器の相対回転により入力側部材と出力側部材の対向面間に噛み込んで両部材を結合する係合子と、入力側部材に対する保持器の相対回転により弾性変形し、その復元弾性によって係合子が係合解除される中立位置に保持器を復帰回転させるスイッチばねとからなり、前記電磁クラッチが、入力側部材の端部に形成された小径軸部にスライド自在に嵌合され、かつ保持器に対して回り止めされたアーマチュアと、出力側部材に回り止めされてアーマチュアと軸方向で対向するロータと、そのロータと軸方向で対向し、通電によりロータにアーマチュアを吸着させる電磁石と、ロータから離反する方向にアーマチュアを押圧する離反ばねとから成る回転伝達装置において、前記入力側部材の小径軸部に係合溝と、軸部端面からその係合溝に至る軸方向溝とを形成し、前記係合溝に前記アーマチュアの離反量を制限する止め輪を嵌合し、その止め輪の内周に形成された係合片を前記軸方向溝に係合して止め輪を回り止めし、その止め輪の外周に、アーマチュアが止め輪に当接する離反状態でのみ、そのアーマチュアの内径面に形成された切欠部に嵌合して、アーマチュアを回り止めする回り止め片を設けた構成を採用したのである。
In order to solve the above-described problems, in the present invention, two directions for transmitting and blocking rotational torque between an input side member and an output side member provided outside the input member are provided. A clutch and an electromagnetic clutch for controlling engagement and disengagement of the two-way clutch are incorporated, and the two-way clutch is held between the input side member and the output side member, and held by the cage An engagement member that engages between opposing surfaces of the input side member and the output side member by relative rotation of the cage with respect to the input side member, and elastically deforms by relative rotation of the cage with respect to the input side member. A switch spring for returning and rotating the retainer to a neutral position where the engagement element is disengaged by its restoring elasticity, and the electromagnetic clutch slides on a small diameter shaft portion formed at an end portion of the input side member. Armature that is fitted to the retainer and is prevented from rotating with respect to the cage, a rotor that is prevented from being rotated by the output side member and that is opposed to the armature in the axial direction, and that is opposed to the rotor in the axial direction and is electrically energized to the rotor. In a rotation transmission device comprising an electromagnet that adsorbs the armature and a separation spring that presses the armature in a direction away from the rotor, an engagement groove is formed in the small-diameter shaft portion of the input side member, and the engagement groove extends from the end surface of the shaft portion. An axial groove is formed, a retaining ring for limiting the armature separation amount is fitted into the engaging groove, and an engagement piece formed on the inner periphery of the retaining ring is engaged with the axial groove. prevented from rotating the retaining ring Te, the outer periphery of the retaining ring, only separated state the armature abuts against the retaining ring, rotating the fitted to the notch formed in the radially inner surface of the armature, to detent the armature It was adopted a structure in which a locking piece.

上記のように、アーマチュアの離反量を制限する止め輪に回り止め片を設け、アーマチュアには止め輪に当接する離反状態でその回り止め片が嵌合する切欠部を形成したことにより、入力側部材の空転状態で回り止め片が切欠部に嵌合してアーマチュアを回り止めするため、入力側部材と保持器が相対回転するようなことはなく、入力側部材の空転時に２方向クラッチがミス係合するのを防止することができる。   As described above, the stopper ring is provided on the retaining ring that limits the amount of separation of the armature, and the armature is formed with a notch that fits the stopper piece in the separated state in contact with the retaining ring. Since the rotation-preventing piece fits into the notch and prevents the armature from rotating in the idling state of the member, the input-side member and the cage do not rotate relative to each other. Engagement can be prevented.

また、アーマチュアを平板とすることができるため、ロータに吸着される摩擦面に摩擦抵抗を増大させる特殊な研削加工を施すことが可能となり、上記摩擦面に所定の面粗さを確保することができる。このため、電磁石に対する通電状態でロータとそのロータに吸着されるアーマチュアの吸着面間に滑りが生じるという不都合の発生はなく、２方向クラッチを確実に係合状態に切り替えることができ、信頼性の高い回転伝達装置を得ることができる。   Further, since the armature can be a flat plate, it is possible to perform a special grinding process for increasing the frictional resistance on the friction surface attracted by the rotor, and to ensure a predetermined surface roughness on the friction surface. it can. Therefore, there is no inconvenience of slippage between the rotor and the armature attracting surface attracted to the rotor when the electromagnet is energized, and the two-way clutch can be reliably switched to the engaged state. A high rotation transmission device can be obtained.

以下、この発明の実施の形態を図面に基づいて説明する。図１に示すように、閉塞端を有するハウジング１内には入力側部材としての入力軸２が組込まれている。この入力軸２は、カムリング３を軸方向の中央部に有し、そのカムリング３両端に一対の小径軸部４，５を設けた構成とされている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, an input shaft 2 as an input side member is incorporated in a housing 1 having a closed end. The input shaft 2 has a cam ring 3 at the center in the axial direction, and a pair of small diameter shaft portions 4 and 5 are provided at both ends of the cam ring 3.

入力軸２の外側には出力側部材としての外輪６が設けられ、その外輪６と入力軸２は軸受７を介して相対的に回転自在に支持されている。また、外輪６はハウジング１内に組込まれた軸受８を介して回転自在に支持されている。   An outer ring 6 as an output side member is provided outside the input shaft 2, and the outer ring 6 and the input shaft 2 are supported through a bearing 7 so as to be relatively rotatable. The outer ring 6 is rotatably supported through a bearing 8 incorporated in the housing 1.

入力軸２と外輪６との間には２方向クラッチ１０が設けられ、その２方向クラッチ１０の係合および係合解除を制御する電磁クラッチ２０が上記２方向クラッチ１０に並設されている。   A two-way clutch 10 is provided between the input shaft 2 and the outer ring 6, and an electromagnetic clutch 20 that controls engagement and disengagement of the two-way clutch 10 is provided in parallel with the two-way clutch 10.

図４に示すように、２方向クラッチ１０は、外輪６の内周に円筒面１１を形成し、カムリング３の外周には上記円筒面１１との間でくさび形空間を形成する複数のカム面１２を周方向に間隔をおいて設け、各カム面１２と円筒面１１間に係合子としてのローラ１３を組込み、そのローラ１３を入力軸２と外輪６間に組込まれた保持器１４で保持した２方向ローラクラッチから成っている。   As shown in FIG. 4, the two-way clutch 10 forms a cylindrical surface 11 on the inner periphery of the outer ring 6, and a plurality of cam surfaces that form a wedge-shaped space with the cylindrical surface 11 on the outer periphery of the cam ring 3. 12 are provided at intervals in the circumferential direction, and a roller 13 as an engaging member is incorporated between each cam surface 12 and the cylindrical surface 11, and the roller 13 is held by a cage 14 incorporated between the input shaft 2 and the outer ring 6. It consists of a two-way roller clutch.

入力軸２と保持器１４の相互間には、ローラ１３が円筒面１１およびカム面１２に対して係合解除される中立位置に保持器１４を弾性保持するスイッチばね１５が組込まれている。   Between the input shaft 2 and the cage 14, a switch spring 15 is incorporated which elastically holds the cage 14 in a neutral position where the roller 13 is disengaged from the cylindrical surface 11 and the cam surface 12.

スイッチばね１５は、Ｃ形リング部１５ａの両端に一対の押圧片１５ｂを外向きに形成した構成とされている。   The switch spring 15 has a configuration in which a pair of pressing pieces 15b are formed outward at both ends of the C-shaped ring portion 15a.

図２および図４に示すように、スイッチばね１５は、カムリング３の端面に形成されたばね収納凹部１６内にリング部１５ａが嵌合される組付けとされ、一対の押圧片１５ｂはばね収納凹部１６の周壁に形成された切欠部１７から保持器１４の端面に設けられた切欠き１８内に挿入されて、切欠部１７および切欠き１８の周方向で対向する端面を相反する方向に押圧し、その押圧によってローラ１３を中立位置に保持している。   As shown in FIGS. 2 and 4, the switch spring 15 is assembled so that the ring portion 15 a is fitted into a spring housing recess 16 formed on the end surface of the cam ring 3, and the pair of pressing pieces 15 b are spring housing recesses. 16 is inserted into a notch 18 provided in the end face of the retainer 14 from a notch 17 formed in the peripheral wall, and the opposite end faces in the circumferential direction of the notch 17 and the notch 18 are pressed in opposite directions. The roller 13 is held in the neutral position by the pressing.

図１に示すように、電磁クラッチ２０は、入力軸２の小径軸部５にスライド自在に嵌合されて保持器１４の端面と軸方向で対向するアーマチュア２１と、そのアーマチュア２１と軸方向で対向するロータ２２と、そのロータ２２と軸方向で対向する電磁石２３と、アーマチュア２１がロータ２２から離反する方向に押圧する離反ばね２４とから成る。   As shown in FIG. 1, the electromagnetic clutch 20 is slidably fitted to the small-diameter shaft portion 5 of the input shaft 2 and faces the end surface of the cage 14 in the axial direction, and the armature 21 in the axial direction. The rotor 22 is opposed, the electromagnet 23 is opposed to the rotor 22 in the axial direction, and the separation spring 24 is pressed in a direction in which the armature 21 is separated from the rotor 22.

図２に示すように、アーマチュア２１には係合孔２５が形成され、その係合孔２５に保持器１４の端面に設けられた突片２６が挿入され、その突片２６と係合孔２５の係合によって、アーマチュア２１は保持器１４に対して回り止めされ、かつ、軸方向に移動可能とされている。   As shown in FIG. 2, an engagement hole 25 is formed in the armature 21, and a projecting piece 26 provided on the end surface of the retainer 14 is inserted into the engagement hole 25, and the projecting piece 26 and the engagement hole 25 are inserted. As a result of the engagement, the armature 21 is prevented from rotating with respect to the retainer 14 and is movable in the axial direction.

図１に示すように、ロータ２２は、内周および外周に円筒部２２ａ、２２ｂを有し、外周の円筒部２２ｂが外輪６の開口端部内に取付けられた非磁性体から成るロータガイド２７内に圧入されて外輪６に回り止めされている。   As shown in FIG. 1, the rotor 22 has cylindrical portions 22 a and 22 b on the inner periphery and the outer periphery, and the outer cylindrical portion 22 b is installed in the opening end portion of the outer ring 6 and is formed in a rotor guide 27 made of a nonmagnetic material. The outer ring 6 is prevented from being rotated.

電磁石２３は、フィールドコア２３ａと、そのフィールドコア２３ａに支持された電磁コイル２３ｂから成る。この電磁石２３は、ロータ２２の内、外の円筒部２２ａ、２２ｂ間に配置され、フィールドコア２３ａがハウジング１の閉塞端に非回転に支持されている。   The electromagnet 23 includes a field core 23a and an electromagnetic coil 23b supported by the field core 23a. The electromagnet 23 is disposed between the outer cylindrical portions 22 a and 22 b of the rotor 22, and the field core 23 a is supported on the closed end of the housing 1 in a non-rotating manner.

図２および図６に示すように、入力軸２の小径軸部５には、係合溝３０と、小径軸部５の端面から係合溝３０に至る軸方向溝３１とが形成され、上記係合溝３０にアーマチュア２１の離反量を制限する止め輪３２が嵌め込まれている。   As shown in FIGS. 2 and 6, the small diameter shaft portion 5 of the input shaft 2 is formed with an engagement groove 30 and an axial groove 31 extending from the end surface of the small diameter shaft portion 5 to the engagement groove 30. A retaining ring 32 that restricts the amount of separation of the armature 21 is fitted in the engaging groove 30.

止め輪３２の内周には係合片３３が設けられ、その係合片３３は小径軸部５に設けられた上記軸方向溝３１に係合し、その係合によって止め輪３２は回り止めされている。   An engagement piece 33 is provided on the inner periphery of the retaining ring 32, and the engagement piece 33 is engaged with the axial groove 31 provided in the small diameter shaft portion 5, and the retaining ring 32 is prevented from rotating by the engagement. Has been.

また、止め輪３２の外周対向位置には、アーマチュア２１に向けて一対の回り止め片３４が形成され、各回り止め片３４はアーマチュア２１の内径面に形成された一対の切欠部３５に対して嵌合可能とされている。   In addition, a pair of anti-rotation pieces 34 are formed at the outer peripheral position of the retaining ring 32 toward the armature 21, and each anti-rotation piece 34 is against a pair of notches 35 formed on the inner diameter surface of the armature 21. It can be fitted.

回り止め片３４は、アーマチュア２１が止め輪３２に当接する位置まで離反したとき切欠部３５に嵌合し、その嵌合によってアーマチュア２１を回り止めするようになっており、上記アーマチュア２１がロータ２２に吸着される状態で切欠部３５から抜け出して、アーマチュア２１の回り止めを解除するようになっている。   The anti-rotation piece 34 is fitted into the notch 35 when the armature 21 is separated to a position where it comes into contact with the retaining ring 32, and the armature 21 is prevented from rotating by the fitting. The armature 21 is released from the notch 35 while being attracted to the armature 21 and the armature 21 is unlocked.

実施の形態で示す回転伝達装置は上記の構造から成り、電磁石２３の電磁コイル２３ｂに対する通電の遮断状態では、スイッチばね１５のばね力によりローラ１３は中立状態に保持されるため、入力軸２の回転は外輪６に伝達されず、入力軸２が空転する。   The rotation transmission device shown in the embodiment has the above-described structure, and the roller 13 is held in a neutral state by the spring force of the switch spring 15 when the energization of the electromagnet 23 to the electromagnetic coil 23b is interrupted. The rotation is not transmitted to the outer ring 6 and the input shaft 2 rotates idle.

入力軸２の回転状態において、電磁石２３の電磁コイル２３ｂに通電すると、アーマチュア２１に吸引力が付与され、アーマチュア２１は離反ばね２４の弾性に抗して移動して、図５に示すように、ロータ２２に吸着されると共に、回り止め片３４と切欠部３５の嵌合が解除される。   When the electromagnetic coil 23b of the electromagnet 23 is energized in the rotation state of the input shaft 2, an attractive force is applied to the armature 21, and the armature 21 moves against the elasticity of the separation spring 24, as shown in FIG. While being attracted to the rotor 22, the engagement between the rotation stopper piece 34 and the notch 35 is released.

ロータ２２とアーマチュア２１の吸着面に作用する摩擦抵抗は保持器１４の回転抵抗となり、その摩擦抵抗は、スイッチばね１５のばね力より予め大きな値に設定されているため、スイッチばね１５は弾性変形して、入力軸２と保持器１４とが相対回転する。その相対回転により、ローラ１３がくさび形空間の狭小部に押し込まれて円筒面１１およびカム面１２に係合し、入力軸２の回転はローラ１３を介して外輪６に伝達される。   The frictional resistance acting on the attracting surfaces of the rotor 22 and the armature 21 becomes the rotational resistance of the cage 14, and the frictional resistance is set to a value larger than the spring force of the switch spring 15, so that the switch spring 15 is elastically deformed. As a result, the input shaft 2 and the cage 14 rotate relative to each other. By the relative rotation, the roller 13 is pushed into the narrow portion of the wedge-shaped space and engaged with the cylindrical surface 11 and the cam surface 12, and the rotation of the input shaft 2 is transmitted to the outer ring 6 through the roller 13.

入力軸２から外輪６へのトルク伝達状態において、電磁コイル２３ｂに対する通電を遮断すると、離反ばね２４の押圧により、アーマチュア２１はロータ２２から離反して、図２に示すように、止め輪３２に当接する位置まで移動する。このとき、止め輪３２に設けられた回り止め片３４が切欠部３５に嵌合して、アーマチュア２１を回り止めする。   In the state of torque transmission from the input shaft 2 to the outer ring 6, when the energization to the electromagnetic coil 23 b is cut off, the armature 21 is separated from the rotor 22 by the pressing of the separation spring 24, and as shown in FIG. Move to the abutting position. At this time, the anti-rotation piece 34 provided on the retaining ring 32 fits into the notch 35 to prevent the armature 21 from rotating.

また、アーマチュア２１がロータ２２から離反すると、スイッチばね１５のばね力により保持器１４が入力軸２に対して係合時の逆方向に回転され、ローラ１３は円筒面１１およびカム面１２から係合解除されて中立位置に戻される。このため、入力軸２から外輪６への回転伝達が遮断される。   When the armature 21 is separated from the rotor 22, the retainer 14 is rotated in the reverse direction when engaged with the input shaft 2 by the spring force of the switch spring 15, and the roller 13 is engaged with the cylindrical surface 11 and the cam surface 12. It is released and returned to the neutral position. For this reason, rotation transmission from the input shaft 2 to the outer ring 6 is interrupted.

入力軸２の空転状態では、その入力軸２と保持器１４がスイッチばね１５によって弾性的に連結されているため、入力軸２と保持器１４およびその保持器１４に保持されたローラ１３が共に回転する。   In the idling state of the input shaft 2, the input shaft 2 and the cage 14 are elastically connected by the switch spring 15, so that the input shaft 2, the cage 14, and the roller 13 held by the cage 14 are both Rotate.

このため、入力軸２が空転すると、ローラ１３は遠心力により半径方向外方へ移動して円筒面１１に接触し、その接触部に作用する摩擦抵抗によって保持器１４に引きずりトルクが発生する。この引きずりトルクはスイッチばね１５の弾性保持力に抗して作用して、入力軸２に対して保持器１４を相対回転させようとする。   For this reason, when the input shaft 2 idles, the roller 13 moves radially outward by centrifugal force to contact the cylindrical surface 11, and drag torque is generated in the cage 14 by the frictional resistance acting on the contact portion. This drag torque acts against the elastic holding force of the switch spring 15 and tries to rotate the cage 14 relative to the input shaft 2.

このとき、アーマチュア２１はその内径面に形成された切欠部３５と止め輪３２に設けられた回り止め片３４の嵌合によって回り止めされ、また、保持器１４とアーマチュア２１は係合孔２５に対する突片２６の係合により回り止めされているため、入力軸２に対して保持器１４が相対回転するようなことはなく、入力軸２の空転時に２方向クラッチ１０がミス係合するという不都合の発生はない。   At this time, the armature 21 is prevented from rotating by the fitting of the notch 35 formed on the inner diameter surface of the armature 21 and the rotation stopper 34 provided on the retaining ring 32, and the retainer 14 and the armature 21 are engaged with the engagement hole 25. Since the rotation is prevented by the engagement of the projecting piece 26, the cage 14 does not rotate relative to the input shaft 2, and the two-way clutch 10 is misengaged when the input shaft 2 is idling. There is no occurrence.

また、アーマチュア２１は、その内径面に形成された切欠部３５と止め輪３２に設けられた回り止め片３４の嵌合によって回り止めされるため、アーマチュア２１を平板とすることができる。   Further, since the armature 21 is prevented from being rotated by the fitting of the notch 35 formed on the inner diameter surface of the armature 21 with the rotation stopper 34 provided on the retaining ring 32, the armature 21 can be a flat plate.

このため、アーマチュア２１のロータ２２に吸着される摩擦面に摩擦抵抗を増大させる特殊な研削加工を施すことが可能となり、上記摩擦面に所定の面粗さを確保することができる。したがって、電磁石２３に対する通電状態でロータ２２とそのロータ２２に吸着されるアーマチュア２１の吸着面間に滑りが生じるという不都合の発生はなく、２方向クラッチ１０を確実に係合状態に切り替えることができ、信頼性の高い回転伝達装置を得ることができる。   For this reason, it is possible to perform a special grinding process for increasing the frictional resistance on the friction surface adsorbed by the rotor 22 of the armature 21, and to ensure a predetermined surface roughness on the friction surface. Therefore, there is no inconvenience of slippage between the rotor 22 and the attracting surface of the armature 21 attracted to the rotor 22 when the electromagnet 23 is energized, and the two-way clutch 10 can be reliably switched to the engaged state. A highly reliable rotation transmission device can be obtained.

この発明に係る回転伝達装置の実施形態を示す縦断正面図A longitudinal front view showing an embodiment of a rotation transmission device according to the present invention 図１のアーマチュアの組込み部を拡大して示す断面図Sectional drawing which expands and shows the installation part of the armature of FIG. 図２のIII−III線に沿った断面図Sectional view along line III-III in FIG. 図２のIV−IV線に沿った断面図Sectional view along line IV-IV in FIG. アーマチュアの吸着状態を示す断面図Sectional view showing armature adsorption state 入力軸、アーマチュアおよび止め輪を示す分解斜視図Exploded perspective view showing input shaft, armature and retaining ring

符号の説明Explanation of symbols

２ 入力軸（入力側部材）
５ 小径軸部
６ 外輪（出力側部材）
１０ ２方向クラッチ
１３ ローラ（係合子）
１４ 保持器
１５ スイッチばね
２０ 電磁クラッチ
２１ アーマチュア
２２ ロータ
２３ 電磁石
３２ 止め輪
３４ 回り止め片
３５ 切欠部 2 Input shaft (input side member)
5 Small diameter shaft part 6 Outer ring (output side member)
10 Two-way clutch 13 Roller (engagement element)
14 Cage 15 Switch spring 20 Electromagnetic clutch 21 Armature 22 Rotor 23 Electromagnet 32 Retaining ring 34 Non-rotating piece 35 Notch

Claims (1)

入力側部材とその外側に設けられた出力側部材の相互間に、その両部材の相互間で回転トルクの伝達と遮断とを行なう２方向クラッチと、その２方向クラッチの係合および係合解除を制御する電磁クラッチとを組込み、前記２方向クラッチが、入力側部材と出力側部材間に組込まれた保持器と、その保持器に保持され、前記入力側部材に対する保持器の相対回転により入力側部材と出力側部材の対向面間に噛み込んで両部材を結合する係合子と、入力側部材に対する保持器の相対回転により弾性変形し、その復元弾性によって係合子が係合解除される中立位置に保持器を復帰回転させるスイッチばねとからなり、前記電磁クラッチが、入力側部材の端部に形成された小径軸部にスライド自在に嵌合され、かつ保持器に対して回り止めされたアーマチュアと、出力側部材に回り止めされてアーマチュアと軸方向で対向するロータと、そのロータと軸方向で対向し、通電によりロータにアーマチュアを吸着させる電磁石と、ロータから離反する方向にアーマチュアを押圧する離反ばねとから成る回転伝達装置において、
前記入力側部材の小径軸部に係合溝と、軸部端面からその係合溝に至る軸方向溝とを形成し、前記係合溝に前記アーマチュアの離反量を制限する止め輪を嵌合し、その止め輪の内周に形成された係合片を前記軸方向溝に係合して止め輪を回り止めし、その止め輪の外周に、アーマチュアが止め輪に当接する離反状態でのみ、そのアーマチュアの内径面に形成された切欠部に嵌合して、アーマチュアを回り止めする回り止め片を設けたことを特徴とする回転伝達装置。 A two-way clutch that transmits and shuts off rotational torque between the input side member and an output side member provided outside the input side member, and engagement and disengagement of the two-way clutch An electromagnetic clutch that controls the two-way clutch, the cage incorporated between the input-side member and the output-side member, and the cage is held by the cage and is input by relative rotation of the cage with respect to the input-side member. An engaging member that is engaged between the opposing surfaces of the side member and the output side member to couple the two members, and a neutral member that is elastically deformed by the relative rotation of the cage with respect to the input side member, and the engaging member is disengaged by its restoring elasticity. The electromagnetic clutch is slidably fitted to a small-diameter shaft portion formed at the end of the input side member and is prevented from rotating with respect to the cage. A A rotor that is prevented from rotating by the output side member and faces the armature in the axial direction, an electromagnet that faces the rotor in the axial direction and attracts the armature to the rotor when energized, and presses the armature in a direction away from the rotor A rotation transmission device comprising a separating spring that
An engaging groove and an axial groove extending from the shaft end surface to the engaging groove are formed in the small-diameter shaft portion of the input side member, and a retaining ring for limiting the separation amount of the armature is fitted in the engaging groove. Then , the engaging piece formed on the inner periphery of the retaining ring is engaged with the axial groove to prevent the retaining ring from rotating, and only in a separated state where the armature contacts the retaining ring on the outer periphery of the retaining ring. A rotation transmission device, characterized in that a rotation-stopping piece for locking the armature is provided by fitting into a notch formed on the inner diameter surface of the armature.
JP2006069482A 2006-03-14 2006-03-14 Rotation transmission device Expired - Fee Related JP4732200B2 (en)

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JP2003090356A (en) * 2001-09-17 2003-03-28 Ntn Corp Rotation transmitting device
JP2004084906A (en) * 2002-08-29 2004-03-18 Ntn Corp Rotation transmission device
JP2004190720A (en) * 2002-12-09 2004-07-08 Ntn Corp Electromagnetic clutch

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003090356A (en) * 2001-09-17 2003-03-28 Ntn Corp Rotation transmitting device
JP2004084906A (en) * 2002-08-29 2004-03-18 Ntn Corp Rotation transmission device
JP2004190720A (en) * 2002-12-09 2004-07-08 Ntn Corp Electromagnetic clutch

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