JP7030038B2 - Rotation transmission device - Google Patents

Rotation transmission device Download PDF

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JP7030038B2
JP7030038B2 JP2018181999A JP2018181999A JP7030038B2 JP 7030038 B2 JP7030038 B2 JP 7030038B2 JP 2018181999 A JP2018181999 A JP 2018181999A JP 2018181999 A JP2018181999 A JP 2018181999A JP 7030038 B2 JP7030038 B2 JP 7030038B2
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inner ring
armature
ring
respect
engager
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JP2020051535A (en
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光司 佐藤
隆英 齋藤
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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り替えに用いられる回転伝達装置に関する。 The present invention relates to a rotary transmission device used for switching between transmission and interruption of power in a power transmission path.

従来、回転伝達装置として、内方部材と、この内方部材の外方に配置された内周部を有する外輪と、それら内方部材と外輪間で回転トルクの伝達と遮断を行うクラッチ機構とを備えるものが知られている。そのクラッチ機構は、外輪の内周部と、内方部材との間に配置された係合子としてのローラと、係合子を保持する保持器とを有する。係合子は、内方部材に対する保持器の相対回転によって円筒面及びカム面に係合する係合位置と、当該係合を解除する中立位置との間を移動可能に配置されている。保持器の相対回転を制御する手段として、中立ばねと、電磁石と、ロータと、アーマチュアとを備えるものがある（例えば、特許文献１）。 Conventionally, as a rotation transmission device, an inner member, an outer ring having an inner peripheral portion arranged on the outer side of the inner member, and a clutch mechanism for transmitting and disconnecting rotational torque between the inner member and the outer ring. Those equipped with are known. The clutch mechanism has a roller as an engager arranged between an inner peripheral portion of the outer ring and an inner member, and a cage for holding the engager. The engager is movably arranged between an engagement position that engages the cylindrical surface and the cam surface by the relative rotation of the cage with respect to the inner member and a neutral position that disengages the engagement. As a means for controlling the relative rotation of the cage, there is a means including a neutral spring, an electromagnet, a rotor, and an armature (for example, Patent Document 1).

特許文献１の回転伝達装置では、中立ばねが、内方部材に対する保持器の相対回転により弾性変形させられ、その復元弾性により、内輪は、係合子を中立位置に移動させるように復帰回転させられる。アーマチュアは、軸方向に移動可能に支持されており、また、保持器に対して回り止めされている。ロータは、外輪に対して回り止めされている。電磁石に対する通電により、アーマチュアがロータに吸着されると、保持器が、アーマチュア、ロータを介して外輪に接続され、その保持器と内方部材の相対回転により、係合子が外輪および内方部材に係合させられ、内方部材と外輪間において回転トルクが伝達される。前述の通電を遮断すると、中立ばねのばね力により保持器が復帰回転させられ、この保持器に周方向に押される係合子が中立位置に移動させられて、前述の係合が解除される。特許文献１のような回転伝達装置では、係合子の係合によって大きなトルク伝達容量を実現することができる。 In the rotation transmission device of Patent Document 1, the neutral spring is elastically deformed by the relative rotation of the cage with respect to the inner member, and the restoring elasticity causes the inner ring to return and rotate to move the engager to the neutral position. .. The armature is supported axially movably and is detented to the cage. The rotor is detented to the outer ring. When the armature is attracted to the rotor by energizing the electromagnet, the cage is connected to the outer ring via the armature and rotor, and the relative rotation of the cage and the inner member causes the engager to attach to the outer ring and inner member. Engaged, rotational torque is transmitted between the inner member and the outer ring. When the above-mentioned energization is cut off, the cage is restored and rotated by the spring force of the neutral spring, and the engager pushed in the circumferential direction by the cage is moved to the neutral position to release the above-mentioned engagement. In a rotation transmission device as in Patent Document 1, a large torque transmission capacity can be realized by engaging the engaging element.

特開２００５－９０６７８号公報Japanese Unexamined Patent Publication No. 2005-90678

しかしながら、特許文献１のような回転伝達装置では、係合子としてのローラが中立位置にあり、かつ内方部材が外輪に対して高速に空転することがある。このとき、その内方部材のカム面と保持器のポケット面に保持されたローラは、内方部材及び保持器と共に高速に回転する。このため、ローラに作用する遠心力により、ローラが外輪の円筒面に押し付けられることがある。ここで、内方部材と外輪間の相対的な回転速度差が大きい場合、ローラが外輪の円筒面に対して高速回転し、円筒面とローラの摺動部で生じる摩擦が引き摺りトルクとなり、ローラや円筒面の摩耗、ローラのミス係合（ローラが不正に係合位置へ移動させられる）、動力損失の原因になる。 However, in a rotation transmission device as in Patent Document 1, the roller as an engaging element may be in a neutral position, and the inner member may idle at a high speed with respect to the outer ring. At this time, the rollers held on the cam surface of the inner member and the pocket surface of the cage rotate at high speed together with the inner member and the cage. Therefore, the centrifugal force acting on the roller may press the roller against the cylindrical surface of the outer ring. Here, when the relative rotational speed difference between the inner member and the outer ring is large, the roller rotates at high speed with respect to the cylindrical surface of the outer ring, and the friction generated between the cylindrical surface and the sliding portion of the roller becomes the drag torque, and the roller. It causes wear of the cylindrical surface, misengagement of the roller (roller is improperly moved to the engagement position), and power loss.

そこで、この発明が解決しようとする課題は、回転伝達装置が高速に空転する際に外輪と係合子間の摩擦発生を防止することにある。 Therefore, an object to be solved by the present invention is to prevent friction between the outer ring and the engaging element when the rotation transmission device idles at high speed.

上記の課題を達成するため、この発明は、内輪と、前記内輪と同軸回りに回転可能かつ当該内輪に対して外方に配置された外輪と、前記内輪と同軸回りに回転可能かつ当該内輪に対して内方に配置された内方部材と、前記内輪と一体に回転するようにかつ当該内輪に対して径方向に移動可能に配置された係合子と、前記内輪に対して前記係合子を付勢する弾性部材と、前記内輪に対する前記内方部材の相対回転によって弾性変形させられる中立ばねと、前記内輪と前記内方部材のいずれか一方の部材に対して回り止めされたアーマチュアと、前記アーマチュアに軸方向に対向する電磁石と、前記電磁石への通電によって吸引される前記アーマチュアを受け止めて当該アーマチュアの回転に抵抗するように配置された摩擦面部と、前記アーマチュアを前記摩擦面部から離反する方向に押圧する離反ばねと、を備え、前記外輪が、前記係合子の外方端部に径方向に対向する係合凹部を有し、前記係合子が、前記外輪に接触不可な中立位置と、前記外輪の前記係合凹部に周方向に係合する係合位置との間を径方向に往復可能に配置されており、前記弾性部材が、前記係合子を前記中立位置に向けて付勢するように前記内輪と当該係合子との間に配置されており、前記内方部材が、前記内輪に対する当該内方部材の相対回転を前記係合子の前記中立位置と前記係合位置間の移動に変換するカム面を有する回転伝達装置に構成した。 In order to achieve the above problems, the present invention relates to an inner ring, an outer ring that can rotate coaxially with the inner ring and is arranged outward with respect to the inner ring, and an inner ring that can rotate coaxially with the inner ring and the inner ring. On the other hand, the inner member arranged inward, the engaging element arranged so as to rotate integrally with the inner ring and radially movable with respect to the inner ring, and the engaging element with respect to the inner ring. An elastic member that is urged, a neutral spring that is elastically deformed by the relative rotation of the inner member with respect to the inner ring, an armature that is prevented from rotating with respect to either the inner ring or the inner member, and the above. An electromagnet facing the armature in the axial direction, a friction surface portion arranged to receive the armature attracted by energization of the electromagnet and resisting the rotation of the armature, and a direction in which the armature is separated from the friction surface portion. The outer ring has an engaging recess that is radially opposed to the outer end of the engaging element, and the engaging element is in a neutral position where it cannot contact the outer ring. It is arranged so as to reciprocate in the radial direction between the outer ring and the engaging position that engages in the circumferential direction, and the elastic member urges the engaging element toward the neutral position. As described above, the inner ring is arranged between the inner ring and the engagement element, and the inner member causes the relative rotation of the inner member with respect to the inner ring to move between the neutral position and the engagement position of the engagement element. It was configured as a rotation transmission device having a cam surface to be converted.

上記構成によれば、外輪が入力側又は出力側となるとき、内輪と内方部材のうち、アーマチュアに対して回り止めされた一方の部材と反対の他方の部材が、外輪に対して出力側又は入力側となるように、回転伝達装置を使用することができる。外輪の係合凹部と係合子の外方端部が径方向に対向する状態で電磁石へ通電すると、アーマチュアが磁気的に吸引されて摩擦面部に受け止められる。その摩擦面部がアーマチュアの回転に抵抗するため、アーマチュアに対して回り止めされた一方の部材が、他方の部材に対して回転させられる。この回転が内方部材のカム面によって係合子の径方向移動に変換され、係合子が弾性部材に抗して中立位置から係合位置に移動させられる。このため、係合子の外方端部は、外輪の係合凹部に周方向に係合することができる。この係合により、外輪と他方の部材との間で係合子を介したトルク伝達が行われる。その通電を遮断すると、離反ばねの弾性復元により、アーマチュアが摩擦面部から離され、中立ばね、弾性部材の弾性復元により、係合子が中立位置へ復帰させられるまで一方の部材が他方の部材に対して回転させられる。電磁石への通電が遮断状態のとき、離反ばねにより、アーマチュアが摩擦面部から離れた状態に保たれ、中立ばねにより、係合子が外輪と接触不可な中立位置にあるように内輪と内方部材の位相が保たれる。このため、他方の部材は、外輪に対して空転することができる。このとき、弾性部材により、係合子が内輪に対して中立位置に向けて付勢されるため、係合子の係合位置への移動が防止される。このため、他方の部材が外輪に対して高速に空転しても、外輪と係合子間の摩擦発生が防止される。 According to the above configuration, when the outer ring is on the input side or the output side, of the inner ring and the inner member, the other member opposite to the one that is derotated to the armature is on the output side with respect to the outer ring. Alternatively, a rotation transmission device can be used so as to be on the input side. When the electromagnet is energized with the engaging recess of the outer ring and the outer end of the engaging element facing each other in the radial direction, the armature is magnetically attracted and received by the friction surface portion. Since the friction surface portion resists the rotation of the armature, one member that is prevented from rotating with respect to the armature is rotated with respect to the other member. This rotation is converted into radial movement of the engaging element by the cam surface of the inner member, and the engaging element is moved from the neutral position to the engaging position against the elastic member. Therefore, the outer end portion of the engaging element can be engaged with the engaging recess of the outer ring in the circumferential direction. By this engagement, torque is transmitted between the outer ring and the other member via the engaging element. When the energization is cut off, the armature is separated from the friction surface by the elastic restoration of the release spring, and one member is with respect to the other member until the engager is returned to the neutral position by the elastic restoration of the neutral spring and the elastic member. Can be rotated. When the electromagnet is de-energized, the detachment spring keeps the armature away from the friction surface, and the neutral spring keeps the engager in a neutral position where it cannot contact the outer ring. The phase is maintained. Therefore, the other member can idle with respect to the outer ring. At this time, the elastic member urges the engaging element toward the neutral position with respect to the inner ring, so that the engaging element is prevented from moving to the engaging position. Therefore, even if the other member slips at a high speed with respect to the outer ring, friction between the outer ring and the engager is prevented.

具体的には、前記内方部材が、軸方向にアーマチュア側に向かって開放した内方凹部を有し、前記内輪が、前記係合子を径方向に案内する溝部と、前記内方凹部に径方向に連通する外方凹部とを有し、前記溝部及び前記外方凹部が、軸方向にアーマチュア側に向かって開放した形状であり、前記中立ばねが、前記内方凹部と前記外方凹部とに嵌っており、前記係合子及び前記中立ばねのアーマチュア側への軸方向移動を規制する押え部材をさらに備え、前記押え部材が、前記アーマチュアに周方向に係合する第一回り止め部と、前記一方の部材に周方向に係合する第二回り止め部とを有するとよい。このようにすると、係合子、中立ばねをそれぞれ対応の溝部、内方凹部、外方凹部に対して軸方向に挿入して所定の姿勢に配置し、それら係合子、中立ばねの対応の溝部、内方凹部、外方凹部からアーマチュア側への抜け出しを押え部材で規制し、係合子の径方向移動を溝部で安定させ、前述の通電遮断時に内方部材と内輪を中立ばねで連れ回し、前述の通電時に内方凹部と外方凹部で中立ばねを弾性変形させることができ、また、その押え部材を利用してアーマチュアと一方の部材間の回り止めを行うことができる。 Specifically, the inner member has an inner recess that is open toward the armature in the axial direction, and the inner ring has a groove portion that guides the engager in the radial direction and a diameter in the inner recess. It has an outer recess that communicates in the direction, and the groove and the outer recess have a shape that opens toward the armature side in the axial direction, and the neutral spring has the inner recess and the outer recess. Further includes a presser member that is fitted to the armature and restricts the axial movement of the engager and the neutral spring toward the armature, and the presser member has a first detent portion that engages the armature in the circumferential direction. It is preferable to have a second detent portion that engages with the one member in the circumferential direction. In this way, the engager and the neutral spring are inserted in the axial direction with respect to the corresponding groove, the inner recess and the outer recess, respectively, and placed in a predetermined posture. The inner recess and the outer recess are restricted from coming out to the armature side by a pressing member, the radial movement of the engaging element is stabilized by the groove, and the inner member and the inner ring are rotated by a neutral spring at the time of the above-mentioned power cutoff. The neutral spring can be elastically deformed at the inner recess and the outer recess when energized, and the holding member can be used to prevent rotation between the armature and one member.

一例として、前記内輪が、前記溝部から内方へ延びるフランジ部と、前記フランジ部から軸方向にアーマチュア側へ延びる第一軸部とを有し、前記一方の部材が前記内方部材であり、前記アーマチュア、前記内方部材及び前記押え部材が、前記第一軸部の外周に嵌合されており、前記内輪に対する前記内方部材の軸方向移動が、前記押え部材と前記フランジ部とによって規制されているとよい。このようにすると、前述の他方の部材である内輪の第一軸部でアーマチュア、内方部材、押え部材を内輪と同軸上で相対回転可能に支持することができる。また、内輪と押え部材を利用して、内方部材と内輪の相対的な軸方向のずれ合いを防止することができる。 As an example, the inner ring has a flange portion extending inward from the groove portion and a first shaft portion extending axially from the flange portion toward the armature side, and one of the members is the inner member. The armature, the inner member, and the presser member are fitted on the outer periphery of the first shaft portion, and the axial movement of the inner member with respect to the inner ring is restricted by the presser member and the flange portion. It should be done. In this way, the armature, the inner member, and the pressing member can be supported coaxially with the inner ring by the first shaft portion of the inner ring, which is the other member described above, so as to be relatively rotatable. Further, the inner ring and the pressing member can be used to prevent the inner member and the inner ring from being displaced in the relative axial direction.

ここで、前記内輪のうちの前記係合子と軸方向に対向する部位を軸方向に貫通するようにばね孔が形成されており、前記内輪が、前記フランジ部の前記ばね孔よりも内方の部位から軸方向に反アーマチュア側へ延びる第二軸部を有し、前記第二軸部の外周と前記外輪の内周との間に介在する軸受と、前記軸受と前記フランジ部との間に介在するように前記第二軸部の外周に嵌合された間座と、をさらに備え、前記係合子が、前記ばね孔に挿入された突部を有し、前記弾性部材が、前記ばね孔に挿入されており、前記係合子と前記間座とによって、前記弾性部材が前記突部の外方に保たれているとよい。このようにすると、軸受により、内輪と外輪とを同軸上で相対回転可能に支持することができる。また、ばね孔を深さ管理が不要な貫通孔としつつ、軸受と間座と係合子とを利用して弾性部材を突部上に適切に保ち、係合子を中立位置に向けて付勢することができる。 Here, a spring hole is formed so as to vertically penetrate a portion of the inner ring that faces the engaging element in the axial direction, and the inner ring is inward of the spring hole of the flange portion. It has a second shaft portion that extends axially from the portion to the anti-armature side, and is interposed between the outer circumference of the second shaft portion and the inner circumference of the outer ring, and between the bearing and the flange portion. Further comprising a spacer fitted to the outer periphery of the second shaft portion so as to intervene, the engager has a protrusion inserted into the spring hole, and the elastic member is the spring hole. It is preferable that the elastic member is held outside the protrusion by the engaging element and the spacer. In this way, the bearing can support the inner ring and the outer ring on the same axis so as to be relatively rotatable. In addition, while making the spring hole a through hole that does not require depth control, the elastic member is properly held on the protrusion by using the bearing, the spacer, and the engaging element, and the engaging element is urged toward the neutral position. be able to.

他の例として、前記内輪が、前記溝部から内方へ延びるフランジ部を有し、前記内方部材が、前記内方凹部から軸方向にアーマチュア側へ延びる第一軸部と、前記フランジ部よりも内方を通って軸方向に反アーマチュア側へ延びる第二軸部とを有し、前記第二軸部の外周と前記外輪の内周との間に介在する軸受と、前記軸受と前記フランジ部との間に介在するように前記第二軸部の外周に嵌合された間座と、をさらに備え、前記一方の部材が前記内輪であり、前記アーマチュア及び前記押え部材が、前記第一軸部の外周に嵌合されており、前記フランジ部が、前記第二軸部の外周に嵌合されており、前記内方部材に対する前記内輪の軸方向移動が、当該内方部材と前記間座とによって規制されているとよい。このようにすると、軸受により、内方部材と外輪とを同軸上で相対回転可能に支持することができる。前述の他方の部材である内方部材の第一軸部、第二軸部でアーマチュア、内輪、押え部材を内方部材と同軸上で相対回転可能に支持することができる。また、軸受と間座と内方部材とを利用して、内方部材と内輪の相対的な軸方向のずれ合いを防止することができる。 As another example, the inner ring has a flange portion extending inward from the groove portion, and the inner member has a first shaft portion extending axially from the inner concave portion toward the armature side and a flange portion. Also has a second shaft portion that extends inwardly toward the anti-armature side in the axial direction, and has a bearing interposed between the outer periphery of the second shaft portion and the inner circumference of the outer ring, and the bearing and the flange. Further comprising a spacer fitted to the outer periphery of the second shaft portion so as to intervene between the portions, one of the members is the inner ring, and the armature and the presser member are the first. The flange portion is fitted to the outer periphery of the shaft portion, the flange portion is fitted to the outer periphery of the second shaft portion, and the axial movement of the inner ring with respect to the inner member is between the inner member and the inner member. It should be regulated by the seat. In this way, the bearing can support the inner member and the outer ring on the same axis so as to be relatively rotatable. The armature, the inner ring, and the pressing member can be supported coaxially with the inner member so as to be relatively rotatable by the first shaft portion and the second shaft portion of the inner member, which is the other member described above. Further, the bearing, the spacer, and the inner member can be used to prevent the inner member and the inner ring from being displaced in the relative axial direction.

ここで、前記内輪のうちの前記係合子と軸方向に対向する部位を軸方向に貫通するようにばね孔が形成されており、前記係合子が、前記ばね孔に挿入された突部を有し、前記弾性部材が、前記ばね孔に挿入されており、前記係合子と前記間座とによって、前記弾性部材が前記突部の外方に保たれているとよい。このようにすると、ばね孔を深さ管理が不要な貫通孔としつつ、軸受と間座と係合子とを利用して弾性部材を突部上に適切に保ち、係合子を中立位置に向けて付勢することができる。 Here, a spring hole is formed so as to penetrate in the axial direction through a portion of the inner ring that faces the engaging element in the axial direction, and the engaging element has a protrusion inserted into the spring hole. It is preferable that the elastic member is inserted into the spring hole, and the elastic member is held outside the protrusion by the engaging element and the spacer. In this way, while making the spring hole a through hole that does not require depth control, the elastic member is properly held on the protrusion by using the bearing, the spacer, and the engaging element, and the engaging element is directed to the neutral position. Can be urged.

また、前記摩擦面部が、前記外輪に対して回り止めされかつ前記アーマチュアに軸方向に対向するように配置されているとよい。このようにすると、外輪が高速回転する場合に好適なものとなる。 Further, it is preferable that the friction surface portion is arranged so as to be prevented from rotating with respect to the outer ring and to face the armature in the axial direction. In this way, it becomes suitable when the outer ring rotates at high speed.

上述のように、この発明は、上記構成の採用により、回転伝達装置が高速に空転する際に外輪と係合子間の摩擦発生を防止することができる。 As described above, by adopting the above configuration, the present invention can prevent friction between the outer ring and the engager when the rotation transmission device idles at high speed.

この発明の第一実施形態に係る回転伝達装置を示す断面図Sectional drawing which shows the rotation transmission apparatus which concerns on 1st Embodiment of this invention. 図１の回転伝達装置の要部の分解斜視図An exploded perspective view of a main part of the rotation transmission device of FIG. 図１のＩＩＩ－ＩＩＩ線の切断面を示す断面図Sectional drawing which shows the cut surface of the line III-III of FIG. 図１のＩＶ－ＩＶ線の切断面を示す断面図FIG. 1 is a cross-sectional view showing a cut surface of the IV-IV line of FIG. 図１の回転伝達装置の動作を示す断面図Sectional drawing which shows the operation of the rotation transmission device of FIG. この発明の第二実施形態に係る回転伝達装置を示す断面図Sectional drawing which shows the rotation transmission apparatus which concerns on 2nd Embodiment of this invention. 図６の回転伝達装置の要部の分解斜視図An exploded perspective view of a main part of the rotation transmission device of FIG. 図６のＶＩＩＩ－ＶＩＩＩ線の切断面を示す断面図Sectional drawing which shows the cut surface of the line VIII-VIII of FIG. 図６のＩＸ－ＩＸ線の切断面を示す断面図FIG. 6 is a cross-sectional view showing a cut surface of the IX-IX line of FIG. 図６の回転伝達装置の動作を示す断面図FIG. 6 is a cross-sectional view showing the operation of the rotation transmission device of FIG.

この発明に係る一例としての第一実施形態を添付図面に基づいて説明する。図１は、第一実施形態の回転伝達装置を、例えば、自動車用トランスミッションの隔壁の一部である静止部材Ｗに取り付けた状態を示している。 The first embodiment as an example according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a state in which the rotation transmission device of the first embodiment is attached to, for example, a stationary member W which is a part of a partition wall of an automobile transmission.

この回転伝達装置は、内輪１と、内輪１と同軸回りに回転可能かつ内輪１に対して外方に配置された外輪２と、内輪１と同軸回りに回転可能かつ内輪１に対して内方に配置された内方部材３と、内方部材３と外輪２との間に配置された複数の係合子４と、内輪１に対して係合子４を付勢する弾性部材５と、内輪１に対して内方部材３を付勢する中立ばね６と、内輪１と内方部材３のいずれか一方の部材としての内方部材３に対して回り止めされたアーマチュア７と、アーマチュア７に軸方向に対向する電磁石８と、電磁石８への通電によって吸引されるアーマチュア７を受け止めて当該アーマチュア７の回転に抵抗するように配置された摩擦面部９と、アーマチュア７を付勢する離反ばね１０と、内方部材３と外輪２との間に配置された軸受１１と、軸受１１と内輪１との間に配置された間座１２と、係合子４等に対してアーマチュア７側に配置された押え部材１３とを備える。 This rotation transmission device has an inner ring 1, an outer ring 2 that can rotate coaxially with the inner ring 1 and is arranged outward with respect to the inner ring 1, and can rotate coaxially with the inner ring 1 and is inward with respect to the inner ring 1. The inner member 3 arranged in the inner ring 3, a plurality of engaging elements 4 arranged between the inner member 3 and the outer ring 2, an elastic member 5 for urging the engaging element 4 with respect to the inner ring 1, and an inner ring 1. A neutral spring 6 that urges the inner member 3 with respect to the inner ring 1, an armature 7 that is prevented from rotating with respect to the inner member 3 as one of the inner ring 1 and the inner member 3, and a shaft on the armature 7. An electromagnet 8 facing in the direction, a friction surface portion 9 arranged to receive the armature 7 attracted by energization of the electromagnet 8 and resisting the rotation of the armature 7, and a separation spring 10 for urging the armature 7. , The bearing 11 arranged between the inner member 3 and the outer ring 2, the spacer 12 arranged between the bearing 11 and the inner ring 1, and the engagement element 4 and the like are arranged on the armature 7 side. A presser member 13 is provided.

以下、内輪と外輪と内方部材の同軸の軸線（回転中心線）に沿った方向を「軸方向」という。また、その軸方向に直交する方向を「径方向」という。また、その軸線回りに一周する円周方向を「周方向」という。 Hereinafter, the direction along the coaxial axis (rotation center line) of the inner ring, the outer ring, and the inner member is referred to as "axial direction". Further, the direction orthogonal to the axial direction is called "diameter direction". In addition, the circumferential direction that goes around the axis is called the "circumferential direction".

内輪１は、係合子４と弾性部材５を案内、支持するためのものであって、この例では、回転伝達経路を構成する回転軸（図示省略）に連結される伝達軸を兼ねている。一方、外輪２は、その回転伝達経路を構成する他の回転軸（図示省略）に連結される。内輪１と外輪２の一方が他方側へ回転トルクを伝達する入力軸となり、他方が一方側から伝達されたトルクで回転する出力軸となる。内輪１と外輪２のどちらが入力軸となるかは限定されない。 The inner ring 1 is for guiding and supporting the engaging element 4 and the elastic member 5, and in this example, also serves as a transmission shaft connected to a rotation shaft (not shown) constituting a rotation transmission path. On the other hand, the outer ring 2 is connected to another rotation shaft (not shown) constituting the rotation transmission path. One of the inner ring 1 and the outer ring 2 serves as an input shaft that transmits rotational torque to the other side, and the other serves as an output shaft that rotates with the torque transmitted from one side. Which of the inner ring 1 and the outer ring 2 serves as the input shaft is not limited.

図１、図２に示すように、内輪１は、係合子４を径方向に案内する複数の溝部１ａと、溝部１ａから内方へ延びるフランジ部１ｂと、フランジ部１ｂから軸方向にアーマチュア７側（図１において左方向）へ延びる第一軸部１ｃと、フランジ部１ｂから軸方向に反アーマチュア７側（図１において右方向）へ延びる第二軸部１ｄとを有する。なお、図２では、第一軸部１ｃのアーマチュア７側、外輪２のアーマチュア７側をそれぞれ切欠き、軸受１１、間座１２の図示を省略している。 As shown in FIGS. 1 and 2, the inner ring 1 has a plurality of groove portions 1a for guiding the engaging element 4 in the radial direction, a flange portion 1b extending inward from the groove portion 1a, and an armature 7 axially from the flange portion 1b. It has a first shaft portion 1c extending to the side (left direction in FIG. 1) and a second shaft portion 1d extending axially from the flange portion 1b to the anti-armature 7 side (right direction in FIG. 1). In FIG. 2, the armature 7 side of the first shaft portion 1c and the armature 7 side of the outer ring 2 are notched, and the bearing 11 and the spacer 12 are not shown.

外輪２は、係合子４の外方端部４ａに径方向に対向する二箇所以上の係合凹部２ａと、これら係合凹部２ａに対してアーマチュア７側に位置する筒部２ｂと、それら係合凹部２ａに対して反アーマチュア７側に位置する軸受座部２ｃと、軸受座部２ｃから軸方向に延びる軸部２ｄとを有する。軸部２ｄは、前述の回転軸との連結に使用される。筒部２ｂに摩擦面部９が連結されている。 The outer ring 2 has two or more engaging recesses 2a that are radially opposed to the outer end portion 4a of the engaging element 4, a tubular portion 2b located on the armature 7 side with respect to the engaging recesses 2a, and their engagement. It has a bearing seat portion 2c located on the anti-armature 7 side with respect to the joint recess 2a, and a shaft portion 2d extending axially from the bearing seat portion 2c. The shaft portion 2d is used for connecting to the above-mentioned rotating shaft. The friction surface portion 9 is connected to the tubular portion 2b.

摩擦面部９は、外輪２に対して回り止めされかつアーマチュア７に軸方向に対向するように配置されている。摩擦面部９は、内方円筒部と、この内方円筒部の外方に位置する外方円筒部と、これら内方円筒部と外方円筒部間を径方向に繋ぐ側端部とを有するロータからなる。摩擦面部９は、その外方円筒部を外輪２の筒部２ｂに圧入することによって外輪２に固定されている。その固定により、摩擦面部９は、電磁石８に吸引されるアーマチュア７を摩擦面部９の側端部において軸方向に受け止めることができ、かつ摩擦面部９の外方円筒部において外輪２と同軸上で一体に回転することができるように連結されている。なお、摩擦面部９は、ロータガイドを介して外輪に固定してもよい。 The friction surface portion 9 is arranged so as to be prevented from rotating with respect to the outer ring 2 and to face the armature 7 in the axial direction. The friction surface portion 9 has an inner cylindrical portion, an outer cylindrical portion located on the outer side of the inner cylindrical portion, and a side end portion that connects the inner cylindrical portion and the outer cylindrical portion in the radial direction. It consists of a rotor. The friction surface portion 9 is fixed to the outer ring 2 by press-fitting the outer cylindrical portion thereof into the tubular portion 2b of the outer ring 2. By the fixing, the friction surface portion 9 can receive the armature 7 attracted by the electromagnet 8 in the axial direction at the side end portion of the friction surface portion 9, and is coaxial with the outer ring 2 at the outer cylindrical portion of the friction surface portion 9. They are connected so that they can rotate together. The friction surface portion 9 may be fixed to the outer ring via a rotor guide.

内輪１の溝部１ａは、溝幅を二等分する径方向の仮想溝中心線に沿った方向に延びる平行溝状になっている。溝部１ａの数は、係合子４と同数である。内輪１のうち、周方向に隣り合う溝部１ａ同士の間は、周方向に連続する円弧状部になっている。それら複数の溝部１ａ及び円弧状部と第一軸部１ｃとの間は、円環状の空間になっている。溝部１ａは、その円環状の空間から内輪１の外周まで径方向に貫通している。 The groove portion 1a of the inner ring 1 has a parallel groove shape extending in a direction along a radial virtual groove center line that bisects the groove width. The number of groove portions 1a is the same as that of the engaging element 4. Of the inner rings 1, between the groove portions 1a adjacent to each other in the circumferential direction is an arcuate portion continuous in the circumferential direction. An annular space is formed between the plurality of groove portions 1a and the arcuate portion and the first shaft portion 1c. The groove portion 1a penetrates from the annular space thereof to the outer periphery of the inner ring 1 in the radial direction.

フランジ部１ｂは、複数の溝部１ａ及び円弧状部から第一軸部１ｃまで延びる円盤状になっている。フランジ部１ｂの両側面は、それぞれ径方向に沿っている。そのフランジ部１ｂのアーマチュア７側の側面は、内方部材３と軸方向に接触する。そのフランジ部１ｂの反アーマチュア側の側面は、間座１２と軸方向に接触する。フランジ部１ｂは、回転トルクに対する内輪１の剛性向上に寄与する。 The flange portion 1b has a disk shape extending from the plurality of groove portions 1a and the arcuate portion to the first shaft portion 1c. Both side surfaces of the flange portion 1b are along the radial direction. The side surface of the flange portion 1b on the armature 7 side is in axial contact with the inner member 3. The side surface of the flange portion 1b on the anti-armature side is in axial contact with the spacer 12. The flange portion 1b contributes to improving the rigidity of the inner ring 1 with respect to the rotational torque.

内輪１のうち、係合子４と軸方向に対向する部位には、弾性部材５を収容するばね孔１ｅが形成されている。ばね孔１ｅは、溝部１ａの溝底の一部とフランジ部１ｂの一部を軸方向に貫通している。内輪１のうち、ばね孔１ｅを形成する孔内面は、弾性部材５を前述の仮想溝中心線に沿った方向に伸縮可能な姿勢に支持する形状になっている。その孔内面は、前述の仮想溝中心線を含む長手側孔軸線に沿った長手面部と、その長手側孔軸線に直角な短手側孔軸線に沿った短手面部と、これら長手面部と短手面部とを繋ぐ各隅面部とからなる。 A spring hole 1e for accommodating the elastic member 5 is formed in a portion of the inner ring 1 that faces the engaging element 4 in the axial direction. The spring hole 1e penetrates a part of the groove bottom of the groove portion 1a and a part of the flange portion 1b in the axial direction. Of the inner ring 1, the inner surface of the hole forming the spring hole 1e has a shape that supports the elastic member 5 in a posture that allows expansion and contraction in a direction along the above-mentioned virtual groove center line. The inner surface of the hole includes a longitudinal surface portion along the longitudinal hole axis including the above-mentioned virtual groove center line, a short surface portion along the short side hole axis perpendicular to the longitudinal hole axis, and these longitudinal surface portions and short surfaces. It consists of each corner that connects to the hand.

第二軸部１ｄは、フランジ部１ｂのばね孔１ｅよりも内方の部位から軸方向に反アーマチュア７側へ延びている。フランジ部１ｂと第一軸部１ｃと第二軸部１ｄは、同軸に設けられている。第二軸部１ｄの外径は、第一軸部１ｃの外径よりも大きく設定されている。第一軸部１ｃは、前述の回転軸との連結に使用される。 The second shaft portion 1d extends axially toward the anti-armature 7 side from a portion inward of the spring hole 1e of the flange portion 1b. The flange portion 1b, the first shaft portion 1c, and the second shaft portion 1d are provided coaxially. The outer diameter of the second shaft portion 1d is set to be larger than the outer diameter of the first shaft portion 1c. The first shaft portion 1c is used for connecting to the above-mentioned rotating shaft.

軸受１１は、内輪１の第二軸部１ｄの外周に嵌合された内方軌道輪１１ａと、外輪２の軸受座部２ｃの内周に嵌合された外方軌道輪１１ｂとを有する転がり軸受からなる。軸受１１は、内輪１と外輪２とを同軸上で相対回転可能に支持する。軸受１１の反アーマチュア７側への軸方向移動は、外方軌道輪１１ｂと軸受座部２ｃとの突き合いによって規制されている。軸受１１のアーマチュア７側への軸方向移動は、外輪２の内周に取り付けられた止め輪１４によって規制されている。なお、軸受１１として、内方軌道輪１１ａの軌道と、外方軌道輪１１ｂの軌道間に介在する複数の転動体によって内外の軌道輪１１ａ，１１ｂを容易に分離できない非分離型の玉軸受を例示したが、これに限定されるものではない。 The bearing 11 has an inner raceway ring 11a fitted to the outer periphery of the second shaft portion 1d of the inner ring 1 and an outer raceway ring 11b fitted to the inner circumference of the bearing seat portion 2c of the outer ring 2. It consists of bearings. The bearing 11 supports the inner ring 1 and the outer ring 2 on the same axis so as to be relatively rotatable. The axial movement of the bearing 11 toward the anti-armature 7 side is regulated by the abutment between the outer raceway ring 11b and the bearing seat portion 2c. The axial movement of the bearing 11 toward the armature 7 is regulated by the retaining ring 14 attached to the inner circumference of the outer ring 2. As the bearing 11, a non-separable ball bearing in which the inner and outer raceway rings 11a and 11b cannot be easily separated by a plurality of rolling elements interposed between the raceway of the inner raceway ring 11a and the raceway of the outer raceway ring 11b is used. Although exemplified, the present invention is not limited to this.

内輪１の第一軸部１ｃと摩擦面部９の内方円筒部との間に他の軸受１５が介在している。他の軸受１５は、内輪１と摩擦面部９とを同軸上で相対回転可能に支持する。 Another bearing 15 is interposed between the first shaft portion 1c of the inner ring 1 and the inner cylindrical portion of the friction surface portion 9. The other bearing 15 supports the inner ring 1 and the friction surface portion 9 on the same axis so as to be relatively rotatable.

間座１２は、内輪１に対する軸受１１の軸方向位置を一定に定める環状のものである。間座１２は、第二軸部１ｄの外周に嵌合されている。間座１２の外径は、内輪１のフランジ部１ｂの外径と同等に設定されている。間座１２のアーマチュア７側の側面は、全てのばね孔１ｅを覆うようになっている。 The spacer 12 is an annular shape that constantly determines the axial position of the bearing 11 with respect to the inner ring 1. The spacer 12 is fitted to the outer periphery of the second shaft portion 1d. The outer diameter of the spacer 12 is set to be the same as the outer diameter of the flange portion 1b of the inner ring 1. The side surface of the spacer 12 on the armature 7 side covers all the spring holes 1e.

なお、内輪１、外輪２の全体を一体に形成する必要なく、別体の軸部を内輪本体、外輪本体に連結するようにしてもよい。その連結手段は特に限定されず、例えば、セレーション嵌合、スプライン嵌合、キーによる連結等が挙げられる。また、軸部を中実状にする必要はなく、中空軸状にしてもよい。また、内輪及び外輪を収容するハウジングを備え、そのハウジングに電磁石を取り付け、外輪の外周とハウジングの内周間に軸受を配置して外輪をハウジングに対して回転自在に支持し、そのハウジングを壁部等の他の静止部位に固定するようにしてもよい。 It is not necessary to integrally form the inner ring 1 and the outer ring 2, and the separate shaft portion may be connected to the inner ring main body and the outer ring main body. The connecting means is not particularly limited, and examples thereof include serration fitting, spline fitting, and key connection. Further, the shaft portion does not have to be in a solid shape, and may be in a hollow shaft shape. In addition, a housing for accommodating the inner ring and the outer ring is provided, an electromagnet is attached to the housing, a bearing is arranged between the outer circumference of the outer ring and the inner circumference of the housing to rotatably support the outer ring with respect to the housing, and the housing is supported by the wall. It may be fixed to another stationary part such as a part.

図２、図３に示すように、内方部材３は、内輪１に対して同軸回りに回転自在に配置されている。内方部材３は、第一軸部１ｃの外周に嵌合された内周部３ａと、内方部材３の外周に形成された複数のカム面３ｂとを有する。 As shown in FIGS. 2 and 3, the inner member 3 is rotatably arranged coaxially with respect to the inner ring 1. The inner member 3 has an inner peripheral portion 3a fitted to the outer periphery of the first shaft portion 1c, and a plurality of cam surfaces 3b formed on the outer periphery of the inner member 3.

内方部材３の内周部３ａは、円筒面状になっている。内周部３ａと第一軸部１ｃとの嵌め合いは、内方部材３の外周と内輪１の円弧状壁との間の径方向すきまよりも小さく設定されている。内方部材３が回転する際、内方部材３は、第一軸部１ｃによって径方向に案内される。 The inner peripheral portion 3a of the inner member 3 has a cylindrical surface shape. The fit between the inner peripheral portion 3a and the first shaft portion 1c is set to be smaller than the radial gap between the outer peripheral portion of the inner member 3 and the arcuate wall of the inner ring 1. When the inner member 3 rotates, the inner member 3 is guided in the radial direction by the first shaft portion 1c.

カム面３ｂは、周方向両側に向かって外方へ拡径する形状になっている。複数のカム面３ｂの周方向のピッチ角度と、複数の溝部１ａの周方向のピッチ角度とは、同じに設定されている。カム面３ｂは、カム面３ｂの軸方向幅の管理を不要にするため、内方部材３を軸方向に貫通する溝状になっている。内方部材３の外周のうち、周方向に隣り合うカム面３ｂ間は、円弧状になっている。 The cam surface 3b has a shape that expands outward in the circumferential direction. The pitch angle in the circumferential direction of the plurality of cam surfaces 3b and the pitch angle in the circumferential direction of the plurality of groove portions 1a are set to be the same. The cam surface 3b has a groove shape that penetrates the inner member 3 in the axial direction in order to eliminate the need to manage the axial width of the cam surface 3b. Of the outer circumference of the inner member 3, the space between the cam surfaces 3b adjacent to each other in the circumferential direction is arcuate.

係合子４は、溝部１ａに対して径方向にスライド可能な平行キー状になっている。係合子４の外方端部４ａは、外輪２の係合凹部２ａの溝底面に径方向に対向する先端面と、係合凹部２ａの平行溝内面に周方向に係合可能な対向面とを有する。係合子４の内方端部４ｂは、常にカム面３ｂとの接触を維持可能な曲面状になっている。内輪１に対する係合子４の周方向移動は、溝部１ａによって規制されている。つまり、係合子４は、内輪１と一体に回転するようにかつ当該内輪１に対して径方向に移動可能に配置されている。係合子４の外方端部４ａは、外輪２と径方向に対向する先端面を有する。 The engagement element 4 has a parallel key shape that can slide in the radial direction with respect to the groove portion 1a. The outer end portion 4a of the engaging element 4 has a tip surface that radially faces the bottom surface of the engaging recess 2a of the outer ring 2 and a facing surface that can engage with the inner surface of the parallel groove of the engaging recess 2a in the circumferential direction. Have. The inner end portion 4b of the engager 4 has a curved surface that can always maintain contact with the cam surface 3b. The circumferential movement of the engaging element 4 with respect to the inner ring 1 is regulated by the groove portion 1a. That is, the engaging element 4 is arranged so as to rotate integrally with the inner ring 1 and to be movable in the radial direction with respect to the inner ring 1. The outer end portion 4a of the engaging element 4 has a tip surface that faces the outer ring 2 in the radial direction.

係合子４は、図１、図４に示すように、内輪１のばね孔１ｅに挿入された突部４ｃを有する。弾性部材５は、係合子４を内輪１の溝部１ａと、内方部材３のカム面３ｂで支持する状態でばね孔１ｅに対して反アーマチュア７側から係合子４の突部４ｃの外方に挿入される。間座１２が内輪１の第二軸部１ｄの外周に対する嵌合によって取り付けられると、係合子４と間座１２とによって、ばね１ｅに挿入された弾性部材５が、突部４ｃの外方に保たれている。なお、図では弾性部材５として圧縮コイルばねを例示したが、これに限定されるものではない。 As shown in FIGS. 1 and 4, the engager 4 has a protrusion 4c inserted into the spring hole 1e of the inner ring 1. The elastic member 5 is supported by the groove portion 1a of the inner ring 1 and the cam surface 3b of the inner ring member 3, and the elastic member 5 is outside the protrusion 4c of the engagement element 4 from the anti-armature 7 side with respect to the spring hole 1e. Will be inserted into. When the spacer 12 is attached by fitting the second shaft portion 1d of the inner ring 1 to the outer circumference, the elastic member 5 inserted into the spring 1e by the engaging element 4 and the spacer 12 is moved to the outside of the protrusion 4c. It is kept. Although the compression coil spring is illustrated as the elastic member 5 in the figure, the present invention is not limited to this.

ここで、図１、図３、図４は、カム面３ｂの周方向中央と溝部１ａの周方向中央とが径方向に正対する内輪１と内方部材３の中立時位相を示している。その中立時位相のとき、係合子４の外方端部４ａが外輪２と接触不可な中立位置にあり、係合子４の内方端部４ｂがカム面３ｂの周方向両側に接触している。その中立時位相から内方部材３が内輪１に対して回転すると、図５に示すように、内輪１の溝部１ａによって周方向移動が規制された係合子４に対しても内方部材３が回転することになる。この回転中、内方部材３のカム面３ｂは、弾性部材５に抗して係合子４の内方端部４ｂに係合子４を外方へ押し出す径方向分力を与えつつ、当該内方端部４ｂに対して周方向に変位するように当該内方端部４ｂに摺接する。その摺接は、カム面３ｂによる前述の押し出しによって溝部１ａから外方へ突出する係合子４の外方端部４ａが外輪２の係合凹部２ａに周方向に係合する係合位置になるまで可能となっている。その回転後、内方部材３が内輪１に対して逆回転し、図３に示す中立時位相に復帰するとき、弾性部材５の弾性復元により、係合子４が内方へ押されて中立位置へ復帰させられる。 Here, FIGS. 1, 3, and 4 show the neutral phase of the inner ring 1 and the inner member 3 in which the circumferential center of the cam surface 3b and the circumferential center of the groove portion 1a face each other in the radial direction. In the neutral phase, the outer end 4a of the engager 4 is in a neutral position where it cannot contact the outer ring 2, and the inner end 4b of the engager 4 is in contact with both sides of the cam surface 3b in the circumferential direction. .. When the inner member 3 rotates with respect to the inner ring 1 from the neutral phase, as shown in FIG. 5, the inner member 3 also moves with respect to the engager 4 whose circumferential movement is restricted by the groove portion 1a of the inner ring 1. It will rotate. During this rotation, the cam surface 3b of the inner member 3 applies a radial component force for pushing the engager 4 outward to the inner end portion 4b of the engager 4 against the elastic member 5, and the inner side thereof. It is in sliding contact with the inner end portion 4b so as to be displaced in the circumferential direction with respect to the end portion 4b. The sliding contact is at an engaging position where the outer end portion 4a of the engaging element 4 protruding outward from the groove portion 1a due to the above-mentioned extrusion by the cam surface 3b engages with the engaging recess 2a of the outer ring 2 in the circumferential direction. Is possible. After that rotation, when the inner member 3 rotates in the reverse direction with respect to the inner ring 1 and returns to the neutral phase shown in FIG. 3, the engagement element 4 is pushed inward by the elastic restoration of the elastic member 5 to the neutral position. Can be returned to.

このように、係合子４は、外輪２に接触不可な中立位置と、外輪２の係合凹部２ａに周方向に係合する係合位置との間を径方向に往復可能に配置され、カム面３ｂは、内輪１に対する内方部材３の相対回転を係合子４の中立位置と係合位置間の移動に変換するように設けられている。 In this way, the engaging element 4 is arranged so as to be reciprocating in the radial direction between the neutral position where the outer ring 2 cannot be contacted and the engaging position where the outer ring 2 is engaged in the engaging recess 2a in the circumferential direction. The surface 3b is provided so as to convert the relative rotation of the inner member 3 with respect to the inner ring 1 into movement between the neutral position and the engaging position of the engaging element 4.

なお、図２に示すように、外輪２の係合凹部２ａの総数は、係合子４を係合凹部２ａに突入させることが可能な位相を増やすため、係合子４の総数の３倍とされている。この倍率は任意に変更すればよい。 As shown in FIG. 2, the total number of engaging recesses 2a of the outer ring 2 is set to be three times the total number of engaging recesses 4 in order to increase the phase in which the engaging element 4 can be inserted into the engaging recess 2a. ing. This magnification may be changed arbitrarily.

図１～図３に示すように、内方部材３は、中立ばね６の大部分を嵌め込み可能な内方凹部３ｃを有する。内輪１は、中立ばね６の残部を嵌め込み可能な外方凹部１ｆを有する。内方凹部３ｃおよび外方凹部１ｆは、軸方向にアーマチュア７側に向かって開放している。 As shown in FIGS. 1 to 3, the inner member 3 has an inner recess 3c into which most of the neutral spring 6 can be fitted. The inner ring 1 has an outer recess 1f into which the rest of the neutral spring 6 can be fitted. The inner recess 3c and the outer recess 1f are open in the axial direction toward the armature 7.

中立ばね６は、内輪１に対する内方部材３の相対回転により弾性変形させられ、その復元弾性によって当該内輪１と内方部材３を相対的に復帰回転させる弾性部材からなる。中立ばね６は、内輪１と内方部材３を前述の中立時位相となるように弾性的に保持する。 The neutral spring 6 is composed of an elastic member that is elastically deformed by the relative rotation of the inner member 3 with respect to the inner ring 1, and the restored elasticity causes the inner ring 1 and the inner member 3 to return and rotate relative to each other. The neutral spring 6 elastically holds the inner ring 1 and the inner member 3 so as to have the above-mentioned neutral phase.

中立ばね６は、Ｃ形のリング部６ａと、リング部６ａの両端から内輪１側に向けて形成された一対の係合片部６ｂとを有する金属ばねからなる。中立ばね６のうち、リング部６ａの外径側と、一対の係合片部６ｂのリング部６ａ側とが、内方部材３の内方凹部３ｃに嵌っている。中立ばね６のうち、一対の係合片部６ｂの突端側が、内輪１の外方凹部１ｆに嵌っている。 The neutral spring 6 is composed of a metal spring having a C-shaped ring portion 6a and a pair of engaging piece portions 6b formed from both ends of the ring portion 6a toward the inner ring 1 side. Of the neutral spring 6, the outer diameter side of the ring portion 6a and the ring portion 6a side of the pair of engaging piece portions 6b are fitted in the inner recess 3c of the inner member 3. Of the neutral spring 6, the protruding end side of the pair of engaging piece portions 6b is fitted in the outer concave portion 1f of the inner ring 1.

内方凹部３ｃは、リング部６ａを径方向に支持すると共に、一対の係合片部６ｂに周方向両側から当接し、かつ中立ばね６を軸方向にアーマチュア７側に向かって支持可能な凹形状になっている。 The inward recess 3c is a recess that supports the ring portion 6a in the radial direction, abuts on the pair of engaging piece portions 6b from both sides in the circumferential direction, and can support the neutral spring 6 axially toward the armature 7. It has a shape.

外方凹部１ｆは、内方凹部３ｃに径方向に連通し、かつ一対の係合片部６ｂに周方向両側から当接する溝状になっている。外方凹部１ｆは、周方向に隣り合う溝部１ａ間に連なる一箇所の円弧状壁に形成されている。外方凹部１ｆは、前述の円弧状壁の周方向中程の外周から前述の円環状の空間まで貫通している。 The outer concave portion 1f has a groove shape that communicates with the inner concave portion 3c in the radial direction and abuts on the pair of engaging piece portions 6b from both sides in the circumferential direction. The outer concave portion 1f is formed in a single arcuate wall connected between the groove portions 1a adjacent to each other in the circumferential direction. The outer concave portion 1f penetrates from the outer periphery in the middle of the circumferential direction of the arcuate wall to the annular space described above.

一対の係合片部６ｂは、内方凹部３ｃ、外方凹部１ｆを周方向の相反する方向に向かって押圧する。その押圧によって、内輪１と内方部材３は、前述の中立時位相に弾性的に保持される。図５に例示するように、内輪１と内方部材３間の相対回転が起こると、その回転方向に応じた側の係合片部６ｂが内方凹部３ｃから周方向に押されて、一対の係合片部６ｂ間が狭くなり、その内方凹部３ｃから押されなくなると、一対の係合片部６ｂが図３の状態に弾性復元する。 The pair of engaging piece portions 6b press the inner concave portion 3c and the outer concave portion 1f in opposite directions in the circumferential direction. By the pressing, the inner ring 1 and the inner member 3 are elastically held in the above-mentioned neutral phase. As illustrated in FIG. 5, when the relative rotation between the inner ring 1 and the inner member 3 occurs, the engaging piece portion 6b on the side corresponding to the rotation direction is pushed in the circumferential direction from the inner recess 3c to form a pair. When the space between the engaging piece portions 6b is narrowed and the inner concave portion 3c is no longer pushed, the pair of engaging piece portions 6b are elastically restored to the state shown in FIG.

図１、図２に示すように、押え部材１３は、内輪１の第一軸部１ｃの外周に嵌合された内周部１３ａと、アーマチュア７に周方向に係合する第一回り止め部１３ｂと、内方部材３（一方の部材）に周方向に係合する第二回り止め部１３ｃとを有する。 As shown in FIGS. 1 and 2, the pressing member 13 has an inner peripheral portion 13a fitted to the outer periphery of the first shaft portion 1c of the inner ring 1 and a first detent portion that engages with the armature 7 in the circumferential direction. It has a 13b and a second detent portion 13c that engages the inner member 3 (one member) in the circumferential direction.

押え部材１３の内周部１３ａは、第一軸部１ｃと同軸上で相対回転可能な円筒面状になっている。 The inner peripheral portion 13a of the pressing member 13 has a cylindrical surface shape that can rotate relative to the first shaft portion 1c.

押え部材１３のアーマチュア７側への軸方向移動は、第一軸部１ｃに取り付けられた止め輪１６によって規制されている。押え部材１３は、全ての係合子４及び中立ばね６のアーマチュア７側への軸方向移動を規制する。その規制により、溝部１ａからアーマチュア７側への係合子４の脱出が防止され、内方凹部３ｃ及び外方凹部１ｆからアーマチュア７側への中立ばね６の脱出が防止されている。 The axial movement of the presser member 13 toward the armature 7 is regulated by the retaining ring 16 attached to the first shaft portion 1c. The presser member 13 restricts the axial movement of all the engaging elements 4 and the neutral spring 6 toward the armature 7. The regulation prevents the engagement element 4 from escaping from the groove 1a to the armature 7 side, and prevents the neutral spring 6 from escaping from the inner recess 3c and the outer recess 1f to the armature 7 side.

また、内輪１に対する内方部材３のアーマチュア７側への軸方向移動は、押え部材１３によって規制されている。内輪１に対する内方部材３の反アーマチュア７側への軸方向移動は、フランジ部１ｂによって規制されている。これら規制により、内輪１の溝部１ａと、内方部材３のカム面３ｂとが、係合子４と実質的に同じ軸方向位置に維持される。 Further, the axial movement of the inner member 3 with respect to the inner ring 1 toward the armature 7 is regulated by the pressing member 13. The axial movement of the inner member 3 with respect to the inner ring 1 toward the anti-armature 7 side is regulated by the flange portion 1b. Due to these restrictions, the groove portion 1a of the inner ring 1 and the cam surface 3b of the inner member 3 are maintained at substantially the same axial position as the engaging element 4.

押え部材１３の第二回り止め部１３ｃは、図１、図３に示すように、内方部材３のスリット部３ｄに挿入された突片部からなる。スリット部３ｄは、軸方向にアーマチュア７側に向かって開放し、かつ径方向に延びる平行溝状になっている。スリット部３ｄは、第二回り止め部１３ｃと周方向に係合する。 As shown in FIGS. 1 and 3, the second detent portion 13c of the pressing member 13 is composed of a protruding piece portion inserted into the slit portion 3d of the inner member 3. The slit portion 3d has a parallel groove shape that opens toward the armature 7 side in the axial direction and extends in the radial direction. The slit portion 3d engages with the second detent portion 13c in the circumferential direction.

図１に示すように、アーマチュア７は、内輪１の第一軸部１ｃの外周に嵌合されている。アーマチュア７は、摩擦面部９と止め輪１６との間で、第一軸部１ｃに対して軸方向にスライド可能かつ第一軸部１ｃに対して相対回転可能に配置されている。 As shown in FIG. 1, the armature 7 is fitted to the outer periphery of the first shaft portion 1c of the inner ring 1. The armature 7 is arranged between the friction surface portion 9 and the retaining ring 16 so as to be slidable in the axial direction with respect to the first shaft portion 1c and to be rotatable relative to the first shaft portion 1c.

押え部材１３の第一回り止め部１３ｂは、アーマチュア７の係合口７ａに挿入された突片部からなる。係合口７ａは、アーマチュア７のスライドストロークの全域で第一回り止め部１３ｂと周方向に係合する。 The first detent portion 13b of the presser member 13 is composed of a protruding piece portion inserted into the engagement port 7a of the armature 7. The engagement port 7a engages with the first detent portion 13b in the circumferential direction over the entire slide stroke of the armature 7.

押え部材１３の第一回り止め部１３ｂとアーマチュア７の係合口７ａ間の周方向係合により、押え部材１３がアーマチュア７に対して回り止めされている。押え部材１３の第二回り止め部１３ｃと内方部材３のスリット部３ｄ間の周方向係合により、押え部材１３が内方部材３に対して回り止めされている。すなわち、アーマチュア７は、押え部材１３を介して内方部材３（一方の部材）に対して回り止めされている。 The presser member 13 is prevented from rotating with respect to the armature 7 by the circumferential engagement between the first detent portion 13b of the presser member 13 and the engagement port 7a of the armature 7. The pressing member 13 is prevented from rotating with respect to the inner member 3 by the circumferential engagement between the second detent portion 13c of the pressing member 13 and the slit portion 3d of the inner member 3. That is, the armature 7 is prevented from rotating with respect to the inner member 3 (one member) via the pressing member 13.

なお、図２では、一対の第一回り止め部１３ｂ、一対の第二回り止め部１３ｃを周方向の複数箇所に分散配置で形成し、対応のスリット部３ｄ、係合口７ａも同様に配置したが、それらの数、配置、形態は、中立ばねや係合子との干渉の懸念がない範囲で適宜に定めればよい。 In FIG. 2, a pair of first detent portions 13b and a pair of second detent portions 13c are formed in a distributed arrangement at a plurality of locations in the circumferential direction, and the corresponding slit portions 3d and the engagement port 7a are also arranged in the same manner. However, the number, arrangement, and form thereof may be appropriately determined as long as there is no concern about interference with the neutral spring or the engager.

電磁石８は、フィールドコア８ａと、フィールドコア８ａに支持された電磁コイル８ｂとからなる。フィールドコア８ａは、ヨークとして機能する強磁性材製のものである。フィールドコア８ａは、摩擦面部９の内方円筒部と外方円筒部との間の空間に配置されている。電磁コイル８ｂは、フィールコア８ａ内の環状空間に配置されており、当該環状空間への樹脂充填、接着、フィールドコアへの巻き付け等の適宜の手段でフィールドコア８ａに固定されている。電磁石８は、そのフィールドコア８ａにおいて静止部材Ｗに固定されている。 The electromagnet 8 includes a field core 8a and an electromagnetic coil 8b supported by the field core 8a. The field core 8a is made of a ferromagnetic material that functions as a yoke. The field core 8a is arranged in the space between the inner cylindrical portion and the outer cylindrical portion of the friction surface portion 9. The electromagnetic coil 8b is arranged in the annular space in the feel core 8a, and is fixed to the field core 8a by appropriate means such as resin filling, adhesion, and winding around the field core in the annular space. The electromagnet 8 is fixed to the stationary member W in the field core 8a.

離反ばね１０は、アーマチュア７を摩擦面部９から離反する方向に押圧する。離反ばね１０は、アーマチュア７とロータ３１の対向面間に介在している。離反ばね１０は、アーマチュア７を摩擦面部９から離反する方向に押圧する。離反ばね１０は、例えば、ウェーブワッシャ状又はコイル状の金属ばねである。離反ばね１０のばね力によってアーマチュア７が摩擦面部９から離反させられる際、止め輪１６に軸方向に当接することにより、摩擦面部９から離反する方向へのアーマチュア７の移動が停止させられる。 The release spring 10 presses the armature 7 in a direction away from the friction surface portion 9. The separation spring 10 is interposed between the facing surfaces of the armature 7 and the rotor 31. The release spring 10 presses the armature 7 in a direction away from the friction surface portion 9. The release spring 10 is, for example, a wave washer-shaped or coil-shaped metal spring. When the armature 7 is separated from the friction surface portion 9 by the spring force of the separation spring 10, the armature 7 abuts in the axial direction on the retaining ring 16 to stop the movement of the armature 7 in the direction away from the friction surface portion 9.

この回転伝達装置の動作について説明する（図１を適宜参照）。先ず、電磁石８の電磁コイル８ｂへの通電が遮断されている状態では、係合子４が中立位置にあり（図３参照）、内方部材３（一方の部材）と内輪１（他方の部材）は、中立ばね６のばね力により、カム面３ｂに対して係合子４を中立位置に保つ中立時位相に保持され、係合子４は、弾性部材５のばね力により中立位置に向けて付勢されている。このため、内輪１、外輪２が図３における左回り又は右回りのいずれに回転するとしても、その回転トルクは、係合子４を介して内輪１と外輪２間で伝達されず、内輪１と外輪２が相対的に空転（フリー回転）する状態にある。つまり、回転伝達装置は、内輪１と外輪２間での回転トルクの伝達を遮断する係合解除状態にある。 The operation of this rotation transmission device will be described (see FIG. 1 as appropriate). First, in a state where the energization of the electric magnet 8 to the electromagnetic coil 8b is cut off, the engaging element 4 is in the neutral position (see FIG. 3), and the inner member 3 (one member) and the inner ring 1 (the other member). Is held in the neutral phase by the spring force of the neutral spring 6 to keep the engager 4 in the neutral position with respect to the cam surface 3b, and the engager 4 is urged toward the neutral position by the spring force of the elastic member 5. Has been done. Therefore, regardless of whether the inner ring 1 and the outer ring 2 rotate counterclockwise or clockwise in FIG. 3, the rotational torque is not transmitted between the inner ring 1 and the outer ring 2 via the engaging element 4, and the inner ring 1 and the outer ring 2 are rotated. The outer ring 2 is in a state of relatively idling (free rotation). That is, the rotation transmission device is in an disengaged state in which the transmission of the rotation torque between the inner ring 1 and the outer ring 2 is cut off.

この係合解除状態において、内輪１が回転する場合、その回転は、中立ばね６を介して内方部材３に伝達され、内輪１及び溝部１ａに連れ回される係合子４と共に回転する。また、アーマチュア７は、押え部材１３を介して内方部材３に対して回り止めされているため、アーマチュア７、押え部材１３も共に回転する。この場合、係合子４には、内輪１の回転速度に応じた遠心力が作用するが、係合子４の突部４ｃに作用する弾性部材５のばね力により、係合子４の外方への移動、すなわち係合子４と外輪２の接触が防止される（図３、図４参照）。 When the inner ring 1 rotates in this disengaged state, the rotation is transmitted to the inner member 3 via the neutral spring 6 and rotates together with the engaging element 4 which is taken to the inner ring 1 and the groove portion 1a. Further, since the armature 7 is prevented from rotating with respect to the inner member 3 via the pressing member 13, the armature 7 and the pressing member 13 also rotate together. In this case, a centrifugal force acts on the engaging element 4 according to the rotation speed of the inner ring 1, but the spring force of the elastic member 5 acting on the protrusion 4c of the engaging element 4 causes the engaging element 4 to move outward. Movement, that is, contact between the engaging element 4 and the outer ring 2 is prevented (see FIGS. 3 and 4).

係合子４の外方端部４ａを外輪２の係合凹部２ａに突入させることが可能な位相で内輪１と外輪２が同期回転している状態において、電磁石８の電磁コイル８ｂに通電すると、アーマチュア７が、離反ばね１０のばね力に抗して摩擦面部９に磁気的に吸着させられ、摩擦面部９とアーマチュア７の吸着面に作用する摩擦抵抗が内方部材３の回転抵抗となる。その摩擦抵抗は、中立ばね６のばね力よりも予め大きな値に設定されている。このため、中立ばね６が弾性変形を生じて、内方部材３が内輪１に対して相対回転する（図５参照）。その相対回転により、係合子４の内方端部４ｂが内方部材３のカム面３ｂによって外方へ押される。このとき、係合子４の内方端部４ｂに与えられる径方向外向きの推力は、弾性部材５のばね力よりも大きくなる。このため、弾性部材５が係合子４によって外方へ圧縮され、係合子４が内輪１の溝部１ａから外方へ突出させられ、係合子４の外方端部４ａが外輪２の係合凹部２ａに突入させられ、当該係合凹部２ａに周方向に係合する係合位置まで移動させられる。内輪１又は外輪２の入力側からの回転トルクは、係合凹部２ａに対して当該回転トルクに対応の周方向に係合する係合子４を介して、出力側に伝達される。つまり、回転伝達装置は、係合子４を介して内輪１と外輪２間で回転トルクを伝達する係合状態になる。 When the electromagnetic coil 8b of the electromagnet 8 is energized in a state where the inner ring 1 and the outer ring 2 are rotating synchronously in a phase in which the outer end portion 4a of the engaging element 4 can be inserted into the engaging recess 2a of the outer ring 2. The armature 7 is magnetically attracted to the friction surface portion 9 against the spring force of the separation spring 10, and the frictional resistance acting on the friction surface portion 9 and the suction surface of the armature 7 becomes the rotation resistance of the inner member 3. The frictional resistance is set to a value larger than the spring force of the neutral spring 6 in advance. Therefore, the neutral spring 6 is elastically deformed, and the inner member 3 rotates relative to the inner ring 1 (see FIG. 5). Due to the relative rotation, the inner end portion 4b of the engaging element 4 is pushed outward by the cam surface 3b of the inner member 3. At this time, the radial outward thrust applied to the inner end portion 4b of the engaging element 4 becomes larger than the spring force of the elastic member 5. Therefore, the elastic member 5 is compressed outward by the engaging element 4, the engaging element 4 is projected outward from the groove portion 1a of the inner ring 1, and the outer end portion 4a of the engaging element 4 is the engaging recess of the outer ring 2. It is rushed into 2a and moved to an engaging position where it engages with the engaging recess 2a in the circumferential direction. The rotational torque from the input side of the inner ring 1 or the outer ring 2 is transmitted to the output side via the engaging element 4 that engages with the engaging recess 2a in the circumferential direction corresponding to the rotational torque. That is, the rotation transmission device is in an engaged state in which the rotation torque is transmitted between the inner ring 1 and the outer ring 2 via the engagement element 4.

この係合状態において、電磁石８の電磁コイル８ｂに対する通電を遮断すると、弾性復元する離反ばね１０がアーマチュア７を押圧することにより、アーマチュア７が摩擦面部９から離反させられる。このアーマチュア７の軸方向移動は、止め輪１６によって規制される。また、アーマチュア７が摩擦面部９から離反すると、中立ばね６、弾性部材５のばね力により、内輪１と内方部材３が係合時の逆方向に相対回転させられ、係合子４が中立位置に戻される。このため、回転伝達装置は、係合解除状態になる。 In this engaged state, when the energization of the electromagnet 8 to the electromagnetic coil 8b is cut off, the elastically restoring separation spring 10 presses the armature 7, so that the armature 7 is separated from the friction surface portion 9. The axial movement of the armature 7 is regulated by the retaining ring 16. Further, when the armature 7 separates from the friction surface portion 9, the inner ring 1 and the inner member 3 are relatively rotated in the opposite directions at the time of engagement by the spring force of the neutral spring 6 and the elastic member 5, and the engager 4 is in the neutral position. Is returned to. Therefore, the rotation transmission device is in the disengaged state.

上述のように、この回転伝達装置は、外輪２が入力側又は出力側となるとき、内輪１と内方部材３のうち、アーマチュア７に対して回り止めされた内方部材３（一方の部材）と反対の内輪１（他方の部材）が、外輪２に対して出力側又は入力側となるように使用することが可能であり、その電磁石８への通電が遮断状態のとき、弾性部材５により、係合子４が内輪１に対して外輪２に接触不可な中立位置に向けて付勢されるため、回転伝達装置が高速に空転する際（内輪１が外輪２に対して高速に空転する際）に外輪２と係合子４間の摩擦発生を防止することができる。 As described above, in this rotation transmission device, when the outer ring 2 is on the input side or the output side, the inner member 3 (one member) of the inner ring 1 and the inner member 3 is prevented from rotating with respect to the armature 7. ) And the inner ring 1 (the other member) can be used so as to be on the output side or the input side with respect to the outer ring 2, and when the energization to the electromagnet 8 is cut off, the elastic member 5 As a result, the armature 4 is urged toward the neutral position where the inner ring 1 cannot contact the outer ring 2, so that when the rotation transmission device idles at high speed (the inner ring 1 idles at high speed with respect to the outer ring 2). At the time), it is possible to prevent friction between the outer ring 2 and the engager 4.

また、この回転伝達装置は、内方部材３が軸方向にアーマチュア７側に向かって開放した内方凹部３ｃを有し、内輪１が係合子４を径方向に案内する溝部１ａと、内方凹部３ｃに径方向に連通する外方凹部１ｆとを有し、溝部１ａ及び外方凹部１ｆが軸方向にアーマチュア７側に向かって開放した形状であり、中立ばね６が内方凹部３ｃと外方凹部１ｆとに嵌っており、係合子４及び中立ばね６のアーマチュア７側への軸方向移動を規制する押え部材１３をさらに備えるので、係合子４、中立ばね６をそれぞれ対応の溝部１ａ、内方凹部３ｃ、外方凹部１ｆに対して軸方向に挿入して所定の姿勢に配置し、それら係合子４、中立ばね６の対応の溝部１ａ、内方凹部３ｃ、外方凹部１ｆからアーマチュア７側への抜け出しを押え部材１３で規制し、係合子４の径方向移動を溝部１ａで安定させ、前述の通電遮断時に内方部材３と内輪１を内方凹部３ｃと外方凹部１ｆに嵌る中立ばね６で連れ回し、前述の通電時に内方凹部３ｃと外方凹部１ｆで中立ばね６を弾性変形させることができる。 Further, this rotation transmission device has an inner recess 3c in which the inner member 3 opens axially toward the armature 7 side, and the inner ring 1 has a groove portion 1a for guiding the engager 4 in the radial direction, and the inner side. The recess 3c has an outer recess 1f that communicates radially, the groove 1a and the outer recess 1f are axially open toward the armature 7, and the neutral spring 6 is outward with the inner recess 3c. Since it is fitted to the square recess 1f and further includes a pressing member 13 for restricting the axial movement of the engaging element 4 and the neutral spring 6 toward the armature 7, the engaging element 4 and the neutral spring 6 are provided with the corresponding groove portions 1a, respectively. The armature is inserted into the inner recess 3c and the outer recess 1f in the axial direction and placed in a predetermined posture, and the armature is placed from the engaging element 4, the corresponding groove 1a of the neutral spring 6, the inner recess 3c, and the outer recess 1f. The retaining member 13 regulates the escape to the 7 side, the radial movement of the armature 4 is stabilized by the groove portion 1a, and the inner member 3 and the inner ring 1 are moved into the inner recess 3c and the outer recess 1f when the power is cut off. The neutral spring 6 can be rotated by the fitted neutral spring 6, and the neutral spring 6 can be elastically deformed by the inner recess 3c and the outer recess 1f when the above-mentioned energization is performed.

また、この回転伝達装置は、その押え部材１３がアーマチュア７に周方向に係合する第一回り止め部１３ｂと、内方部材３（一方の部材）に周方向に係合する第二回り止め部１３ｃとを有するので、押え部材１３を利用してアーマチュア７と内方部材３（一方の部材）間の回り止めを行うことができる。 Further, in this rotation transmission device, the holding member 13 engages with the armature 7 in the circumferential direction, and the inner member 3 (one member) engages with the second detent portion 13b in the circumferential direction. Since the portion 13c is provided, the holding member 13 can be used to prevent rotation between the armature 7 and the inner member 3 (one member).

また、この回転伝達装置は、内輪１が溝部１ａから内方へ延びるフランジ部１ｂと、フランジ部１ｂから軸方向にアーマチュア７側へ延びる第一軸部１ｃとを有し、アーマチュア７、アーマチュア７に対して回り止めされた内方部材３（一方の部材）及び押え部材１３が第一軸部１ｃの外周に嵌合されており、内輪１に対する内方部材３の軸方向移動が押え部材１３とフランジ部１ｂとによって規制されているので、内輪１（他方の部材）の第一軸部１ｃでアーマチュア７、内方部材３、押え部材１３を内輪１と同軸上で相対回転可能に支持することができ、また、内輪１と押え部材１３を利用して、内方部材３と内輪１の相対的な軸方向のずれ合いを防止することができる。 Further, this rotation transmission device has a flange portion 1b in which the inner ring 1 extends inward from the groove portion 1a, and a first shaft portion 1c extending axially from the flange portion 1b toward the armature 7 side, and the armature 7 and the armature 7 have. The inner member 3 (one member) and the pressing member 13 that are prevented from rotating with respect to the inner ring 1 are fitted to the outer periphery of the first shaft portion 1c, and the axial movement of the inner member 3 with respect to the inner ring 1 is the pressing member 13. And the flange portion 1b, the armature 7, the inner member 3, and the pressing member 13 are supported by the first shaft portion 1c of the inner ring 1 (the other member) so as to be rotatable relative to the inner ring 1. Further, the inner ring 1 and the pressing member 13 can be used to prevent the inner member 3 and the inner ring 1 from being displaced in the relative axial direction.

また、この回転伝達装置は、内輪１がフランジ部１ｂのばね孔１ｅよりも内方の部位から軸方向に反アーマチュア７側へ延びる第二軸部１ｄを有し、第二軸部１ｄの外周と外輪２の内周との間に介在する軸受１１をさらに備えるので、軸受１１により、内輪１と外輪２とを同軸上で相対回転可能に支持することができる。 Further, this rotation transmission device has a second shaft portion 1d in which the inner ring 1 extends axially from a portion inward of the spring hole 1e of the flange portion 1b toward the anti-armature 7 side, and the outer circumference of the second shaft portion 1d. Since the bearing 11 interposed between the inner ring 2 and the inner circumference of the outer ring 2 is further provided, the inner ring 1 and the outer ring 2 can be supported coaxially and relatively rotatably by the bearing 11.

また、この回転伝達装置は、内輪１のうちの係合子４と軸方向に対向する部位を軸方向に貫通するようにばね孔１ｅが形成されており、軸受１１とフランジ部１ｂとの間に介在するように第二軸部１ｄの外周に嵌合された間座１２をさらに備え、係合子４がばね孔１ｅに挿入された突部４ｃを有し、弾性部材５がばね孔１ｅに挿入されており、係合子４と間座１２とによって弾性部材５が突部４ｃの外方に保たれているので、ばね孔１ｅを深さ管理が不要な貫通孔としつつ、軸受１１と間座１２と係合子４とを利用して弾性部材５を突部４ｃ上に適切に保ち、係合子４を中立位置に向けて付勢することができる。 Further, in this rotation transmission device, a spring hole 1e is formed so as to vertically penetrate a portion of the inner ring 1 facing the engaging element 4 in the axial direction, and the spring hole 1e is formed between the bearing 11 and the flange portion 1b. A spacer 12 fitted to the outer periphery of the second shaft portion 1d so as to intervene is further provided, the engaging element 4 has a protrusion 4c inserted into the spring hole 1e, and the elastic member 5 is inserted into the spring hole 1e. Since the elastic member 5 is held outside the protrusion 4c by the engaging element 4 and the spacer 12, the spring hole 1e is a through hole that does not require depth control, and the bearing 11 and the spacer 12 are used. The elastic member 5 can be appropriately held on the protrusion 4c by using the 12 and the engaging element 4, and the engaging element 4 can be urged toward the neutral position.

また、この回転伝達装置は、摩擦面部９が外輪２に対して回り止めされかつアーマチュア７に軸方向に対向するように配置されているので、外輪２が高速回転する場合に好適なものとなる。すなわち、外輪２が高速回転する場合、係合子４が係合位置にあるとき、外輪２、摩擦面部９及びアーマチュア７が一体的に高速回転することになるので、摩擦面部９とアーマチュア７間の摩擦接触部の摩耗を防止することができる。 Further, since the friction surface portion 9 is prevented from rotating with respect to the outer ring 2 and is arranged so as to face the armature 7 in the axial direction, this rotation transmission device is suitable when the outer ring 2 rotates at high speed. .. That is, when the outer ring 2 rotates at high speed, when the engaging element 4 is in the engaging position, the outer ring 2, the friction surface portion 9 and the armature 7 rotate integrally at high speed, so that between the friction surface portion 9 and the armature 7. It is possible to prevent wear of the frictional contact portion.

なお、外輪２が静止又は微動回転しかしない場合、この回転伝達装置は、内輪１（一方の部材）の回転を制動する装置として使用することができる。この場合、係合子４が係合位置にあるとき、静止する電磁石８に対して外輪２が回転しない又は微動回転しかしないため、ロータを省いて電磁石８のフィールドコアの一部を摩擦面部とすることも可能である。 When the outer ring 2 is stationary or has only slight rotation, this rotation transmission device can be used as a device for braking the rotation of the inner ring 1 (one member). In this case, when the engaging element 4 is in the engaging position, the outer ring 2 does not rotate or only makes a slight rotation with respect to the stationary electromagnet 8, so that the rotor is omitted and a part of the field core of the electromagnet 8 is used as the friction surface portion. It is also possible.

第一実施形態では、内輪１を他の回転軸に連結するようにしたが、内方部材を他の回転軸に連結するように構成してもよい。その一例としての第二実施形態を図６～図１０に基いて説明する。なお、以下では、第一実施形態との相違点を述べるに留める。 In the first embodiment, the inner ring 1 is connected to another rotating shaft, but the inner member may be connected to the other rotating shaft. A second embodiment as an example thereof will be described with reference to FIGS. 6 to 10. In the following, only the differences from the first embodiment will be described.

図６、図７に示すように、この回転伝達装置に係る内輪２１は、フランジ部２１ａから突出する第一軸部及び第二軸部をもたない環状のものとされている。内輪２１の内径は、フランジ部２１ａの内周縁で規定されている。 As shown in FIGS. 6 and 7, the inner ring 21 related to this rotation transmission device is an annular shape having no first shaft portion and second shaft portion protruding from the flange portion 21a. The inner diameter of the inner ring 21 is defined by the inner peripheral edge of the flange portion 21a.

内方部材２２は、図６～図８に示すように、内方凹部３ｃから軸方向にアーマチュア７側へ延びる第一軸部２２ａと、図６、図９に示すように、フランジ部２１ａよりも内方を通って軸方向に反アーマチュア７側へ延びる第二軸部２２ｂとを有する。第一軸部２２ａは、前述の他の回転軸に連結される。 The inner member 22 is formed from the first shaft portion 22a extending axially from the inner recess 3c toward the armature 7 side as shown in FIGS. 6 to 8 and the flange portion 21a as shown in FIGS. 6 and 9. Also has a second shaft portion 22b extending inward and axially to the anti-armature 7 side. The first shaft portion 22a is connected to the other rotating shaft described above.

図６に示すように、アーマチュア７及び押え部材２３は、第一軸部２２ａの外周に嵌合されている。押え部材２３は、内輪２１に周方向に係合する第二回り止め部２３ａを有する。内輪２１（一方の部材）は、第二回り止め部２３ａに周方向に係合するスリット部２１ｂを有する。すなわち、押え部材２３を利用して内輪２１とアーマチュア７間の回り止めが行われている。 As shown in FIG. 6, the armature 7 and the pressing member 23 are fitted to the outer periphery of the first shaft portion 22a. The pressing member 23 has a second detent portion 23a that engages with the inner ring 21 in the circumferential direction. The inner ring 21 (one member) has a slit portion 21b that engages with the second detent portion 23a in the circumferential direction. That is, the presser member 23 is used to prevent rotation between the inner ring 21 and the armature 7.

内輪２１のフランジ部２１ａは、図６、図９に示すように、第二軸部２２ｂの外周に嵌合されている。フランジ部２１ａの内周縁は、円筒面状になっている。フランジ部２１ａの内周縁と第二軸部２２ｂとの嵌め合いは、内方部材２２の外周と内輪２１の円弧状壁との間の径方向すきまよりも小さく設定されている。内輪２１が回転する際、内輪２１は、第二軸部２２ｂによって径方向に案内される。 As shown in FIGS. 6 and 9, the flange portion 21a of the inner ring 21 is fitted to the outer periphery of the second shaft portion 22b. The inner peripheral edge of the flange portion 21a has a cylindrical surface shape. The fit between the inner peripheral edge of the flange portion 21a and the second shaft portion 22b is set to be smaller than the radial clearance between the outer peripheral portion of the inner member 22 and the arcuate wall of the inner ring 21. When the inner ring 21 rotates, the inner ring 21 is guided in the radial direction by the second shaft portion 22b.

図１０に例示するように、内輪２１と内方部材２２間の相対回転が起こると、その回転方向に応じた側の係合片部６ｂが外方凹部１ｆから周方向に押されて、一対の係合片部６ｂ間が狭くなり、その外方凹部１ｆから押されなくなると、一対の係合片部６ｂが図８の状態に弾性復元する。 As illustrated in FIG. 10, when the relative rotation between the inner ring 21 and the inner member 22 occurs, the engaging piece portion 6b on the side corresponding to the rotation direction is pushed in the circumferential direction from the outer concave portion 1f to form a pair. When the space between the engaging piece portions 6b is narrowed and is no longer pushed from the outer concave portion 1f, the pair of engaging piece portions 6b are elastically restored to the state shown in FIG.

図６に示すように、軸受１１の内方軌道輪１１ａ、間座１２は、それぞれ第二軸部２２ｂの外周に嵌合されている。内方部材２２に対する内輪２１のアーマチュア７側への軸方向移動は、フランジ部２１ａに軸方向に対向する内方部材２２の側面部によって規制されている。内方部材２２に対する内輪２１の反アーマチュア７側への軸方向移動は、フランジ部２１ａに軸方向に対向する間座１２によって規制されている。これら規制により、内輪２１の溝部１ａと、内方部材２２のカム面３ｂとが、係合子４と実質的に同じ軸方向位置に維持される。 As shown in FIG. 6, the inner raceway ring 11a and the spacer 12 of the bearing 11 are fitted to the outer periphery of the second shaft portion 22b, respectively. The axial movement of the inner ring 21 with respect to the inner member 22 toward the armature 7 is restricted by the side surface portion of the inner member 22 axially opposed to the flange portion 21a. The axial movement of the inner ring 21 with respect to the inner member 22 toward the anti-armature 7 side is regulated by the spacer 12 that faces the flange portion 21a in the axial direction. Due to these restrictions, the groove portion 1a of the inner ring 21 and the cam surface 3b of the inner member 22 are maintained at substantially the same axial position as the engaging element 4.

この回転伝達装置では、外輪２が入力側又は出力側となるとき、内輪２１と内方部材２２のうち、アーマチュア７に対して回り止めされた内輪２１（一方の部材）と反対の内方部材２２（他方の部材）が、外輪２に対して出力側又は入力側となる（以下、図６を適宜参照）。電磁石８への通電が遮断状態のとき、離反ばね１０により、アーマチュア７が摩擦面部９から離れた状態に保たれ、中立ばね６により、係合子４が外輪２と接触不可な中立位置にあるように内輪２１と内方部材２２の位相が保たれる（図８参照）。このため、内方部材２２は、外輪２に対して空転することができる。このとき、弾性部材５により、係合子４が内輪２１に対して中立位置に向けて付勢されるため、係合子４の係合位置への移動が防止される。このため、回転伝達装置が高速に空転する際（内方部材２２が外輪２に対して高速に空転する際）、外輪２と係合子４間の摩擦発生が防止される。外輪２と内方部材２２が同期回転する状態で電磁石８へ通電すると、アーマチュア７が摩擦面部９に磁気的に吸着させられ、アーマチュア７に対して回り止めされた内輪２１が、アーマチュア７と摩擦面部９間の摩擦により、図１０に示すように、内方部材２２に対して回転させられる。この回転が内方部材２２のカム面３ｂによって係合子４の径方向移動に変換され、係合子４が弾性部材５に抗して中立位置から係合位置に移動させられる。このため、係合子４の外方端部４ａは、外輪２の係合凹部２ａに周方向に係合することができる。この係合により、外輪２と内方部材２２との間で係合子４を介したトルク伝達が行われる。電磁石８の通電を遮断すると、離反ばね１０の弾性復元により、アーマチュア７が摩擦面部９から離され、中立ばね６、弾性部材５の弾性復元により、係合子４が中立位置へ復帰させられるまで内輪２１が内方部材２２に対して回転させられる。 In this rotation transmission device, when the outer ring 2 is on the input side or the output side, the inner member of the inner ring 21 and the inner member 22 is opposed to the inner ring 21 (one member) which is prevented from rotating with respect to the armature 7. 22 (the other member) is the output side or the input side with respect to the outer ring 2 (hereinafter, refer to FIG. 6 as appropriate). When the energization to the electromagnet 8 is cut off, the release spring 10 keeps the armature 7 away from the friction surface portion 9, and the neutral spring 6 keeps the engager 4 in a neutral position where it cannot contact the outer ring 2. The phase of the inner ring 21 and the inner member 22 is maintained (see FIG. 8). Therefore, the inner member 22 can idle with respect to the outer ring 2. At this time, the elastic member 5 urges the engaging element 4 toward the neutral position with respect to the inner ring 21, so that the engaging element 4 is prevented from moving to the engaging position. Therefore, when the rotation transmission device idles at high speed (when the inner member 22 idles at high speed with respect to the outer ring 2), friction generation between the outer ring 2 and the engaging element 4 is prevented. When the armature 7 is energized in a state where the outer ring 2 and the inner member 22 rotate synchronously, the armature 7 is magnetically attracted to the friction surface portion 9, and the inner ring 21 which is prevented from rotating with respect to the armature 7 rubs against the armature 7. Due to the friction between the face portions 9, as shown in FIG. 10, it is rotated with respect to the inner member 22. This rotation is converted into radial movement of the engaging element 4 by the cam surface 3b of the inner member 22, and the engaging element 4 is moved from the neutral position to the engaging position against the elastic member 5. Therefore, the outer end portion 4a of the engaging element 4 can be engaged with the engaging recess 2a of the outer ring 2 in the circumferential direction. By this engagement, torque is transmitted between the outer ring 2 and the inner member 22 via the engaging element 4. When the energization of the electromagnet 8 is cut off, the armature 7 is separated from the friction surface portion 9 by the elastic restoration of the detachment spring 10, and the inner ring is returned to the neutral position by the elastic restoration of the neutral spring 6 and the elastic member 5. 21 is rotated with respect to the inner member 22.

また、この回転伝達装置は、内方部材２２が内方凹部３ｃから軸方向にアーマチュア７側へ延びる第一軸部２２ａと、フランジ部２１ａよりも内方を通って軸方向に反アーマチュア７側へ延びる第二軸部２２ｂとを有し、第二軸部２２ｂの外周と外輪２の内周との間に介在する軸受１１と、軸受１１とフランジ部２１ａとの間に介在するように第二軸部２２ｂの外周に嵌合された間座１２と、をさらに備え、内輪２１がアーマチュア７に対して回り止めされており、アーマチュア７及び押え部材２３が第一軸部２２ａの外周に嵌合されており、フランジ部２１ａが第二軸部２２ｂの外周に嵌合されており、内方部材２２に対する内輪２１の軸方向移動が間座１２と内方部材２２とによって規制されているので、軸受１１により、内方部材２２と外輪２とを同軸上で相対回転可能に支持することができ、内方部材２２の第一軸部２２ａ、第二軸部２２ｂでアーマチュア７、内輪２１、押え部材２３を内方部材２２と同軸上で相対回転可能に支持することができ、また、軸受１１と間座１２と内方部材２２とを利用して、内方部材２２と内輪２１の相対的な軸方向のずれ合いを防止することができる。 Further, in this rotation transmission device, the inner member 22 passes inward from the flange portion 21a and the first shaft portion 22a in which the inner member 22 extends axially toward the armature 7 side from the inner recess 3c, and is axially anti-armature 7 side. The bearing 11 has a second shaft portion 22b extending to, and is interposed between the outer periphery of the second shaft portion 22b and the inner circumference of the outer ring 2, and is interposed between the bearing 11 and the flange portion 21a. A spacer 12 fitted to the outer periphery of the biaxial portion 22b is further provided, the inner ring 21 is prevented from rotating with respect to the armature 7, and the armature 7 and the pressing member 23 are fitted to the outer periphery of the first shaft portion 22a. The flange portion 21a is fitted to the outer periphery of the second shaft portion 22b, and the axial movement of the inner ring 21 with respect to the inner member 22 is restricted by the spacer 12 and the inner member 22. The bearing 11 can support the inner member 22 and the outer ring 2 so as to be rotatable relative to each other on the same axis. The presser member 23 can be supported in a relative rotatable manner coaxially with the inner member 22, and the bearing 11, the spacer 12, and the inner member 22 are used to support the inner member 22 and the inner ring 21 relative to each other. It is possible to prevent a misalignment in the axial direction.

なお、この回転伝達装置においても、内方部材２２の第二軸部２２ｂの外周と外輪２の内周との間に介在する軸受１１と、間座１２と、係合子４とを利用して、貫通孔であるばね孔１ｅに挿入された弾性部材５を突部４ｃ上に適切に保ち、係合子４を中立位置に向けて付勢することができる。 Also in this rotation transmission device, the bearing 11 interposed between the outer periphery of the second shaft portion 22b of the inner member 22 and the inner circumference of the outer ring 2, the spacer 12, and the engaging element 4 are used. The elastic member 5 inserted into the spring hole 1e, which is a through hole, can be appropriately held on the protrusion 4c, and the engaging element 4 can be urged toward the neutral position.

今回開示された実施形態はすべての点で例示であって制限的なものではないと考えられるべきである。したがって、本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiments disclosed this time should be considered to be exemplary and not restrictive in all respects. Therefore, the scope of the present invention is shown by the scope of claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the scope of claims are included.

１，２１ 内輪
１ａ 溝部
１ｂ，２１ａ フランジ部
１ｃ，２２ａ 第一軸部
１ｄ，２２ｂ 第二軸部
１ｅ ばね孔
１ｆ 外方凹部
２ 外輪
２ａ 係合凹部
３，２２ 内方部材
３ｂ カム面
３ｃ 内方凹部
４ 係合子
４ａ 外方端部
４ｂ 内方端部
４ｃ 突部
５ 弾性部材
６ 中立ばね
７ アーマチュア
８ 電磁石
９ 摩擦面部
１０ 離反ばね
１１ 軸受
１２ 間座
１３，２３ 押え部材
１３ｂ 第一回り止め部
１３ｃ，２３ａ 第二回り止め部 1,21 Inner ring 1a Groove 1b, 21a Flange 1c, 22a First shaft 1d, 22b Second shaft 1e Spring hole 1f Outer recess 2 Outer ring 2a Engagement recess 3,22 Inner member 3b Cam surface 3c Inner Recess 4 Engagement element 4a Outer end 4b Inner end 4c Protrusion 5 Elastic member 6 Neutral spring 7 Armature 8 Electromagnet 9 Friction surface 10 Separation spring 11 Bearing 12 Flange 13, 23 Presser member 13b First detent 13c , 23a Second detent

Claims (7)

内輪と、
前記内輪と同軸回りに回転可能かつ当該内輪に対して外方に配置された外輪と、
前記内輪と同軸回りに回転可能かつ当該内輪に対して内方に配置された内方部材と、
前記内輪と一体に回転するようにかつ当該内輪に対して径方向に移動可能に配置された係合子と、
前記内輪に対して前記係合子を付勢する弾性部材と、
前記内輪に対する前記内方部材の相対回転によって弾性変形させられる中立ばねと、
前記内輪と前記内方部材のいずれか一方の部材に対して回り止めされたアーマチュアと、
前記アーマチュアに軸方向に対向する電磁石と、
前記電磁石への通電によって吸引される前記アーマチュアを受け止めて当該アーマチュアの回転に抵抗するように配置された摩擦面部と、
前記アーマチュアを前記摩擦面部から離反する方向に押圧する離反ばねと、
を備え、
前記外輪が、前記係合子の外方端部に径方向に対向する係合凹部を有し、
前記係合子が、前記外輪に接触不可な中立位置と、前記外輪の前記係合凹部に周方向に係合する係合位置との間を径方向に往復可能に配置されており、
前記弾性部材が、前記係合子を前記中立位置に向けて付勢するように前記内輪と当該係合子との間に配置されており、
前記内方部材が、前記内輪に対する当該内方部材の相対回転を前記係合子の前記中立位置と前記係合位置間の移動に変換するカム面を有する回転伝達装置。 Inner ring and
An outer ring that can rotate coaxially with the inner ring and is arranged outward with respect to the inner ring.
An inner member that can rotate coaxially with the inner ring and is arranged inward with respect to the inner ring.
An engaging element arranged so as to rotate integrally with the inner ring and to be movable in the radial direction with respect to the inner ring.
An elastic member that urges the engaging element with respect to the inner ring,
A neutral spring that is elastically deformed by the relative rotation of the inner member with respect to the inner ring,
An armature that is detented to either the inner ring or the inner member,
An electromagnet that faces the armature in the axial direction and
A friction surface portion arranged so as to receive the armature attracted by energization of the electromagnet and resist the rotation of the armature, and
A release spring that presses the armature in a direction away from the friction surface portion,
Equipped with
The outer ring has an engaging recess that is radially opposed to the outer end of the engaging element.
The engager is arranged so as to be able to reciprocate in the radial direction between the neutral position where the outer ring cannot be contacted and the engagement position where the outer ring engages in the engagement recess in the circumferential direction.
The elastic member is arranged between the inner ring and the engager so as to urge the engager toward the neutral position.
A rotation transmission device in which the inner member has a cam surface that converts the relative rotation of the inner member with respect to the inner ring into movement between the neutral position and the engagement position of the engager. 前記内方部材が、軸方向にアーマチュア側に向かって開放した内方凹部を有し、
前記内輪が、前記係合子を径方向に案内する溝部と、前記内方凹部に径方向に連通する外方凹部とを有し、前記溝部及び前記外方凹部が、軸方向にアーマチュア側に向かって開放した形状であり、
前記中立ばねが、前記内方凹部と前記外方凹部とに嵌っており、
前記係合子及び前記中立ばねのアーマチュア側への軸方向移動を規制する押え部材をさらに備え、前記押え部材が、前記アーマチュアに周方向に係合する第一回り止め部と、前記一方の部材に周方向に係合する第二回り止め部とを有する請求項１に記載の回転伝達装置。 The inner member has an inner recess that opens axially toward the armature.
The inner ring has a groove portion that guides the engager in the radial direction and an outer concave portion that communicates radially with the inner concave portion, and the groove portion and the outer concave portion are axially directed toward the armature side. It has an open shape and
The neutral spring is fitted in the inner recess and the outer recess.
A presser member for restricting the axial movement of the engager and the neutral spring toward the armature is further provided, and the presser member is attached to the first detent portion that engages the armature in the circumferential direction and the one member. The rotation transmission device according to claim 1, further comprising a second detent portion that engages in the circumferential direction. 前記内輪が、前記溝部から内方へ延びるフランジ部と、前記フランジ部から軸方向にアーマチュア側へ延びる第一軸部とを有し、
前記一方の部材が前記内方部材であり、前記アーマチュア、前記内方部材及び前記押え部材が、前記第一軸部の外周に嵌合されており、前記内輪に対する前記内方部材の軸方向移動が、前記押え部材と前記フランジ部とによって規制されている請求項２に記載の回転伝達装置。 The inner ring has a flange portion extending inward from the groove portion and a first shaft portion extending axially from the flange portion toward the armature side.
One of the members is the inner member, and the armature, the inner member, and the pressing member are fitted to the outer periphery of the first shaft portion, and the inner ring moves in the axial direction with respect to the inner ring. However, the rotation transmission device according to claim 2, wherein the holding member and the flange portion regulate the rotation transmission device. 前記内輪のうちの前記係合子と軸方向に対向する部位を軸方向に貫通するようにばね孔が形成されており、前記内輪が、前記フランジ部の前記ばね孔よりも内方の部位から軸方向に反アーマチュア側へ延びる第二軸部を有し、
前記第二軸部の外周と前記外輪の内周との間に介在する軸受と、前記軸受と前記フランジ部との間に介在するように前記第二軸部の外周に嵌合された間座と、をさらに備え、
前記係合子が、前記ばね孔に挿入された突部を有し、前記弾性部材が、前記ばね孔に挿入されており、前記係合子と前記間座とによって、前記弾性部材が前記突部の外方に保たれている請求項３に記載の回転伝達装置。 A spring hole is formed so as to axially penetrate a portion of the inner ring that faces the engager in the axial direction, and the inner ring is axially formed from a portion of the flange portion inside the spring hole. It has a second shaft that extends in the direction to the anti-armature side,
A bearing interposed between the outer circumference of the second shaft portion and the inner circumference of the outer ring, and a spacer fitted to the outer circumference of the second shaft portion so as to be interposed between the bearing and the flange portion. And, with more
The engager has a protrusion inserted into the spring hole, the elastic member is inserted into the spring hole, and the engager and the spacer allow the elastic member to form the protrusion. The rotation transmission device according to claim 3, which is kept outward. 前記内輪が、前記溝部から内方へ延びるフランジ部を有し、
前記内方部材が、前記内方凹部から軸方向にアーマチュア側へ延びる第一軸部と、前記フランジ部よりも内方を通って軸方向に反アーマチュア側へ延びる第二軸部とを有し、
前記第二軸部の外周と前記外輪の内周との間に介在する軸受と、前記軸受と前記フランジ部との間に介在するように前記第二軸部の外周に嵌合された間座と、をさらに備え、
前記一方の部材が前記内輪であり、前記押え部材が、前記第一軸部の外周に嵌合されており、前記フランジ部が、前記第二軸部の外周に嵌合されており、前記内方部材に対する前記内輪の軸方向移動が、当該内方部材と前記間座とによって規制されている請求項２に記載の回転伝達装置。 The inner ring has a flange portion extending inward from the groove portion.
The inner member has a first shaft portion extending axially from the inner recess toward the armature side, and a second shaft portion extending inward from the flange portion toward the anti-armature side in the axial direction. ,
A bearing interposed between the outer circumference of the second shaft portion and the inner circumference of the outer ring, and a spacer fitted to the outer circumference of the second shaft portion so as to be interposed between the bearing and the flange portion. And, with more
One of the members is the inner ring, the presser member is fitted to the outer periphery of the first shaft portion, and the flange portion is fitted to the outer periphery of the second shaft portion. The rotation transmission device according to claim 2, wherein the axial movement of the inner ring with respect to the square member is regulated by the inner member and the spacer. 前記内輪のうちの前記係合子と軸方向に対向する部位を軸方向に貫通するようにばね孔が形成されており、
前記係合子が、前記ばね孔に挿入された突部を有し、前記弾性部材が、前記ばね孔に挿入されており、前記係合子と前記間座とによって、前記弾性部材が前記突部の外方に保たれている請求項５に記載の回転伝達装置。 A spring hole is formed so as to axially penetrate a portion of the inner ring that faces the engaging element in the axial direction.
The engager has a protrusion inserted into the spring hole, the elastic member is inserted into the spring hole, and the engager and the spacer allow the elastic member to form the protrusion. The rotation transmission device according to claim 5, which is kept outward. 前記摩擦面部が、前記外輪に対して回り止めされかつ前記アーマチュアに軸方向に対向するように配置されている請求項１から６のいずれか１項に記載の回転伝達装置。 The rotation transmission device according to any one of claims 1 to 6, wherein the friction surface portion is prevented from rotating with respect to the outer ring and is arranged so as to face the armature in the axial direction.
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