JP2011122680A - Electromagnetic clutch - Google Patents

Electromagnetic clutch Download PDF

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Publication number
JP2011122680A
JP2011122680A JP2009281398A JP2009281398A JP2011122680A JP 2011122680 A JP2011122680 A JP 2011122680A JP 2009281398 A JP2009281398 A JP 2009281398A JP 2009281398 A JP2009281398 A JP 2009281398A JP 2011122680 A JP2011122680 A JP 2011122680A
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Prior art keywords
cam member
cam
diameter portion
inner shaft
peripheral surface
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Inventor
Kenji Korenaga
憲司 是永
Takashi Hosokawa
隆司 細川
Minoru Onitake
稔 鬼武
Hiroshi Takuno
博 宅野
Masahiro Horaguchi
雅博 洞口
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JTEKT Corp
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JTEKT Corp
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Priority to JP2009281398A priority Critical patent/JP2011122680A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic clutch that suppresses the generation of vibration caused by the eccentricity of a cam member. <P>SOLUTION: The electromagnetic clutch 10 includes: an inner shaft 3; a first cam member 61 provided on the outer circumference of the inner shaft 3 so as to integrally rotate with the inner shaft 3; a second cam member 62, in which an insertion hole 623 for inserting the inner shaft 3 is formed, which is disposed movably in the axial direction between a first position where it is close to the first cam member 61 in distance and a second position where it is separated farther than the first position in distance to the first cam member 61 and generates a cam force by relative rotation with the first cam member 61; an electromagnetic coil 5, which generates a magnetic force that moves the second cam member 62 in the axial direction. The inner shaft 3 is formed in such a shape that makes the movable distance in the radial direction of the second cam member 62 with respect to the rotation axis thereof becomes smaller at the first position than at the second position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、回転部材間のトルク伝達の制御又は回転部材への制動力の作用を制御する電磁クラッチに関する。   The present invention relates to an electromagnetic clutch for controlling torque transmission between rotating members or controlling an action of a braking force on the rotating members.

従来、カム溝が形成されたカム部材を電磁コイルの磁力によって吸引し、その吸引により発生する他部材との接触部における摩擦によってカム機構を動作させ、カム機構のカム力によって、カム部材をより強く他部材に押し付ける電磁クラッチが知られている。(例えば、特許文献1参照)。   Conventionally, a cam member in which a cam groove is formed is attracted by the magnetic force of an electromagnetic coil, the cam mechanism is operated by friction at a contact portion with other members generated by the attraction, and the cam member is An electromagnetic clutch that strongly presses against another member is known. (For example, refer to Patent Document 1).

特許文献1に記載された電磁クラッチは、前輪をエンジンで駆動し、後輪を電動モータで駆動するように構成された4輪駆動車両の後輪側の駆動系に適用され、電動モータの停止時に後輪のディファレンシャル装置と電動モータとの連結を遮断して走行抵抗を低減すべく、出力軸と減速ギヤ列を構成するギヤとの間に配置されている。   The electromagnetic clutch described in Patent Document 1 is applied to a drive system on the rear wheel side of a four-wheel drive vehicle configured to drive front wheels with an engine and drive rear wheels with an electric motor, and stop the electric motor. Sometimes it is arranged between the output shaft and the gears constituting the reduction gear train in order to cut off the connection between the differential device of the rear wheel and the electric motor to reduce the running resistance.

この電磁クラッチは、電磁コイルと、電磁コイルの磁力によって電磁コイル側に引き寄せられ、出力軸と一体回転する円盤状の部材に摩擦係合するカム部材(アーマチャ)と、このカム部材とギヤとの間に介在するカムフォロアとを備えている。ギヤのカム部材との対向面にはカム溝が形成され、カム部材及びギヤはカムフォロアと共にカム機構を構成している。   The electromagnetic clutch includes an electromagnetic coil, a cam member (armature) that is attracted to the electromagnetic coil side by the magnetic force of the electromagnetic coil and frictionally engages with a disk-shaped member that rotates integrally with the output shaft, and the cam member and the gear. And a cam follower interposed therebetween. A cam groove is formed on a surface of the gear facing the cam member, and the cam member and the gear constitute a cam mechanism together with the cam follower.

車両の走行時に電磁コイルに通電されると、カム部材は上記円盤状の部材に引き寄せられて摩擦係合し、その摩擦力によってギヤと相対回転する。この相対回転によってカムフォロアがカム溝を転動し、カム機構のカム力によってカム部材がより強く摩擦係合し、電動モータのトルクがディファレンシャル側に伝達されるようになる。   When the electromagnetic coil is energized during traveling of the vehicle, the cam member is attracted to the disk-shaped member and frictionally engaged, and is rotated relative to the gear by the frictional force. Due to this relative rotation, the cam follower rolls in the cam groove, and the cam member is frictionally engaged more strongly by the cam force of the cam mechanism, so that the torque of the electric motor is transmitted to the differential side.

一方、電磁コイルが非通電の状態で電動モータが停止すると、カム機構が中立状態(非作動状態)となり、リターンスプリングの力によってカム部材の摩擦係合が解除される。これにより電動モータとディファレンシャル装置との連結が遮断される。   On the other hand, when the electric motor is stopped while the electromagnetic coil is not energized, the cam mechanism is in a neutral state (non-operating state), and the frictional engagement of the cam member is released by the force of the return spring. As a result, the connection between the electric motor and the differential device is cut off.

特開2004−17807号公報JP 2004-17807 A

上記のように構成された電磁クラッチのカム部材は、電磁コイルの通電時に磁力によって確実に引き寄せられるよう、その中心部に形成された挿通孔に挿入された軸部材に対して円滑に軸方向移動可能であることが望ましい。そのため、軸部材の外周面は、カム部材の挿通孔の内面との間に十分な隙間(ガタ)が生じるよう、カム部材の移動範囲では軸部材の外径が小さくなるように形成されていた。   The cam member of the electromagnetic clutch configured as described above smoothly moves in the axial direction with respect to the shaft member inserted in the insertion hole formed in the center portion so that the cam member is reliably attracted by the magnetic force when the electromagnetic coil is energized. It is desirable to be possible. Therefore, the outer peripheral surface of the shaft member is formed so that the outer diameter of the shaft member becomes small in the movement range of the cam member so that a sufficient gap (backlash) is generated between the outer peripheral surface of the shaft member and the inner surface of the insertion hole of the cam member. .

しかし、例えばカム部材の加工誤差等によってカム部材に回転アンバランスが生じていると、電磁コイルの非通電時にカム部材が偏心し、また、その状態で電磁コイルに通電すると、カム部材が偏心した状態のまま摩擦係合する。その結果、回転に伴う振動が発生する場合がある。   However, for example, if rotation imbalance occurs in the cam member due to, for example, a machining error of the cam member, the cam member is eccentric when the electromagnetic coil is not energized, and when the electromagnetic coil is energized in that state, the cam member is eccentric. Friction engagement is performed in the state. As a result, vibration accompanying rotation may occur.

そこで、本発明は、カム部材の偏心による振動の発生を抑制することが可能な電磁クラッチを提供することを目的とする。   Accordingly, an object of the present invention is to provide an electromagnetic clutch capable of suppressing the occurrence of vibration due to the eccentricity of the cam member.

上記目的を達成するため、本発明の電磁クラッチは、軸状の回転部材と、前記回転部材の外周に、前記回転部材と一体回転するように設けられた第1カム部材と、前記回転部材が挿通される挿通孔が形成され、前記第1カム部材との距離が接近した第1位置、及び前記第1カム部材との距離が前記第1位置よりも離間した第2位置の間を軸方向移動可能に配置され、前記第1カム部材との相対回転により軸方向のカム力を発生させる第2カム部材と、前記第2カム部材を軸方向移動させる磁力を発生する電磁コイルと、を備え、前記回転部材は、その回転軸に対する前記第2カム部材の径方向の移動可能距離が前記第2位置よりも前記第1位置で小さくなる形状に形成されている。   In order to achieve the above object, an electromagnetic clutch according to the present invention includes a shaft-shaped rotating member, a first cam member provided on an outer periphery of the rotating member so as to rotate integrally with the rotating member, and the rotating member. An insertion hole is formed, and a first position where the distance to the first cam member is close and a second position where the distance from the first cam member is farther than the first position are axial. A second cam member that is movably disposed and generates an axial cam force by relative rotation with the first cam member; and an electromagnetic coil that generates a magnetic force to move the second cam member in the axial direction. The rotating member is formed in a shape such that the movable distance in the radial direction of the second cam member relative to the rotating shaft is smaller at the first position than at the second position.

この構成によれば、第2カム部材が第1位置にあるときに回転部材に対する第2カム部材の偏心が抑制される。   According to this configuration, the eccentricity of the second cam member with respect to the rotating member is suppressed when the second cam member is in the first position.

また、前記回転部材には、前記第2カム部材が前記第1位置にあるときに前記挿通孔の内面の少なくとも一部に対向する大径部と、前記第2カム部材の前記第1位置から前記第2位置への移動方向に向かって前記大径部から徐々に径が小さくなるテーパ部とを形成するとよい。   The rotating member includes a large-diameter portion facing at least a part of the inner surface of the insertion hole when the second cam member is in the first position, and the first position of the second cam member. A tapered portion that gradually decreases in diameter from the large-diameter portion in the moving direction to the second position may be formed.

この構成によれば、第2カム部材がテーパ部の外周面に沿って第2位置から第1位置へ移動する。   According to this configuration, the second cam member moves from the second position to the first position along the outer peripheral surface of the tapered portion.

また、前記第2カム部材は、前記第1位置にあるときに、前記挿通孔の内面のうち前記第1カム部材側の一部のみが前記大径部に嵌合されるようにするとよい。   In addition, when the second cam member is in the first position, only a part of the inner surface of the insertion hole on the first cam member side is fitted to the large diameter portion.

この構成によれば、第2カム部材の挿通孔の内面の全体が回転部材の大径部に嵌合される場合に比較して、第2カム部材が回転部材の大径部に嵌合された状態で軸方向移動する距離が短くなる。   According to this configuration, the second cam member is fitted to the large-diameter portion of the rotating member as compared with the case where the entire inner surface of the insertion hole of the second cam member is fitted to the large-diameter portion of the rotating member. In such a state, the axial movement distance becomes shorter.

本発明によれば、カム部材の偏心による振動の発生を抑制することができる。   According to the present invention, it is possible to suppress the occurrence of vibration due to the eccentricity of the cam member.

図1は、本発明の第1の実施の形態に係る電磁クラッチが適用された4輪駆動車の駆動力伝達系の構成を示す概略図。FIG. 1 is a schematic diagram showing a configuration of a driving force transmission system of a four-wheel drive vehicle to which an electromagnetic clutch according to a first embodiment of the present invention is applied. 図2は、本発明の第1の実施の形態に係る駆動力伝達装置の構成を示す断面図。FIG. 2 is a cross-sectional view showing the configuration of the driving force transmission device according to the first embodiment of the present invention. 図3は、本発明の第1の実施の形態に係る駆動力伝達装置の作動状態におけるカム機構を示す説明図。FIG. 3 is an explanatory diagram showing the cam mechanism in the operating state of the driving force transmission device according to the first embodiment of the invention. 図4は、本発明の第1の実施の形態に係る駆動力伝達装置の非作動状態におけるカム機構を示す説明図。FIG. 4 is an explanatory view showing a cam mechanism in a non-operating state of the driving force transmission device according to the first embodiment of the present invention. 図5は、本発明の第2の実施の形態に係る電磁クラッチの構成を示す概略図。FIG. 5 is a schematic diagram showing a configuration of an electromagnetic clutch according to a second embodiment of the present invention. 図6は、本発明の第2の実施の形態に係る電磁クラッチの非作動状態を示す説明図。FIG. 6 is an explanatory view showing an inoperative state of the electromagnetic clutch according to the second embodiment of the present invention. 図7は、本発明の第3の実施の形態に係る電磁クラッチの構成を示す概略図。FIG. 7 is a schematic diagram showing a configuration of an electromagnetic clutch according to a third embodiment of the present invention.

[第1の実施の形態]
図1は、本発明の第1の実施の形態に係る電磁クラッチが適用された4輪駆動車の駆動力伝達系の概略構成を示す。図1に示すように、4輪駆動車101は、駆動源としてのエンジン102,エンジン102の出力を一対のフロントアクスルシャフト104及びプロペラシャフト106に分配するトランスアクスル103,一対のフロントアクスルシャフト104のそれぞれに連結された一対の前輪105,プロペラシャフト106のトルクをドライブピニオンシャフト108に伝達する駆動力伝達装置1,ドライブピニオンシャフト108に伝達されたトルクを一対のリヤアクスルシャフト110に分配するリヤディファレンシャル109,及び一対のリヤアクスルシャフト110のそれぞれに連結された一対の後輪111を備えている。
[First Embodiment]
FIG. 1 shows a schematic configuration of a driving force transmission system of a four-wheel drive vehicle to which an electromagnetic clutch according to a first embodiment of the present invention is applied. As shown in FIG. 1, a four-wheel drive vehicle 101 includes an engine 102 as a drive source, a transaxle 103 that distributes the output of the engine 102 to a pair of front axle shafts 104 and a propeller shaft 106, and a pair of front axle shafts 104. A driving force transmission device 1 for transmitting the torque of a pair of front wheels 105 and a propeller shaft 106 connected to each to a drive pinion shaft 108, and a rear differential 109 for distributing the torque transmitted to the drive pinion shaft 108 to a pair of rear axle shafts 110. , And a pair of rear wheels 111 connected to each of the pair of rear axle shafts 110.

駆動力伝達装置1は、4輪駆動車101の車体(図示せず)に固定されたディファレンシャルキャリア107を介してその内部に支持され、プロペラシャフト106とドライブピニオンシャフト108とのトルク伝達を制御可能に構成されている。駆動力伝達装置1がプロペラシャフト106とドライブピニオンシャフト108とをトルク伝達可能に連結すると4輪駆動車101が4輪駆動状態となり、この連結を解除すると4輪駆動車101が2輪駆動状態となる。   The driving force transmission device 1 is supported inside a differential carrier 107 fixed to a vehicle body (not shown) of the four-wheel drive vehicle 101, and can control torque transmission between the propeller shaft 106 and the drive pinion shaft 108. It is configured. When the driving force transmission device 1 connects the propeller shaft 106 and the drive pinion shaft 108 so that torque can be transmitted, the four-wheel drive vehicle 101 enters a four-wheel drive state, and when this connection is released, the four-wheel drive vehicle 101 enters a two-wheel drive state. Become.

また、4輪駆動車101には、駆動力伝達装置1を制御するコントローラ112が搭載されている。コントローラ112は、一対の前輪104及び一対の後輪105の回転速度やアクセル開度等に基づいて駆動力伝達装置1に電流を供給し、駆動力伝達装置1のトルク伝達を制御する。   The four-wheel drive vehicle 101 is equipped with a controller 112 that controls the driving force transmission device 1. The controller 112 supplies current to the driving force transmission device 1 based on the rotational speeds of the pair of front wheels 104 and the pair of rear wheels 105, the accelerator opening degree, and the like, and controls torque transmission of the driving force transmission device 1.

(駆動力伝達装置1の全体構成)
図2は駆動力伝達装置1の構成を示す断面図である。この駆動力伝達装置1は、ディファレンシャルキャリア106(図1に示す)に対して相対回転可能なハウジング2と、このハウジング2に対して同軸状で相対回転可能な軸状の回転部材としてのインナシャフト3と、ハウジング2とインナシャフト3との間に配置されたメインクラッチ4と、ディファレンシャルキャリア107に対して回転不能に保持された電磁コイル5と、電磁コイル5の通電によって作動し、メインクラッチ4を押圧する押圧力を発生するカム機構6とから大略構成されている。電磁コイル5,カム機構6,及びインナシャフト3は、電磁クラッチ10を構成する。
(Overall configuration of the driving force transmission device 1)
FIG. 2 is a cross-sectional view illustrating a configuration of the driving force transmission device 1. The driving force transmission device 1 includes a housing 2 that can rotate relative to a differential carrier 106 (shown in FIG. 1), and an inner shaft that serves as a shaft-like rotating member that is coaxial with the housing 2 and can rotate relative to the housing 2. 3, the main clutch 4 disposed between the housing 2 and the inner shaft 3, the electromagnetic coil 5 held in a non-rotatable manner with respect to the differential carrier 107, and the energization of the electromagnetic coil 5. And a cam mechanism 6 that generates a pressing force for pressing the. The electromagnetic coil 5, the cam mechanism 6, and the inner shaft 3 constitute an electromagnetic clutch 10.

(ハウジング2の構成)
ハウジング2は、フロントハウジング21、及びフロントハウジング21と一体回転するように結合されたリヤハウジング22からなり、ディファレンシャルキャリア107の内部に軸受(図示せず)を介して支持されている。
(Configuration of housing 2)
The housing 2 includes a front housing 21 and a rear housing 22 coupled so as to rotate integrally with the front housing 21, and is supported inside the differential carrier 107 via a bearing (not shown).

フロントハウジング21は、例えば非磁性体材料であるアルミニウム合金からなり、リヤハウジング22側に開口する収容空間21a、及びこの収容空間21aの内面に形成されたストレートスプライン嵌合部21bを有し、プロペラシャフト106(図1に示す)と一体回転するように連結されている。収容空間21aには潤滑油が約80%の充填率で充填されている。   The front housing 21 is made of, for example, an aluminum alloy that is a nonmagnetic material, and includes a housing space 21a that opens to the rear housing 22 side, and a straight spline fitting portion 21b that is formed on the inner surface of the housing space 21a. The shaft 106 (shown in FIG. 1) is connected to rotate integrally. The accommodating space 21a is filled with lubricating oil at a filling rate of about 80%.

リヤハウジング22は、フロントハウジング21の開口内周面に螺着された炭素鋼(例えばS35C、S10C)等の磁性材料からなる外側部材221と、外側部材221の内側に溶接等によって一体に結合されたステンレス等の非磁性材料からなる中間部材222と、中間部材222の内側に溶接等によって一体に結合された炭素鋼等の磁性材料からなる内側部材223とからなる。   The rear housing 22 is integrally coupled to the outer member 221 made of a magnetic material such as carbon steel (for example, S35C, S10C) screwed to the inner peripheral surface of the opening of the front housing 21 and the inner side of the outer member 221 by welding or the like. An intermediate member 222 made of a non-magnetic material such as stainless steel, and an inner member 223 made of a magnetic material such as carbon steel integrally joined to the inside of the intermediate member 222 by welding or the like.

リヤハウジング22には、フロントハウジング21の収容空間21aの開口方向と同一の方向に開口する円環状の収容空間22aが形成されている。また、リヤハウジング22の収容空間22aとは反対側の側面には、後述する第2カム部材62と摩擦係合する摩擦面22bが形成されている。   The rear housing 22 is formed with an annular housing space 22 a that opens in the same direction as the opening direction of the housing space 21 a of the front housing 21. Further, a friction surface 22b that frictionally engages a second cam member 62 described later is formed on the side surface of the rear housing 22 opposite to the accommodation space 22a.

(インナシャフト3の構成)
インナシャフト3は、フロントハウジング21との間に介在するボール軸受210、及びリヤハウジング22との間に介在するニードル軸受220によって、ハウジング2の内側に支持されている。
(Configuration of inner shaft 3)
The inner shaft 3 is supported inside the housing 2 by a ball bearing 210 interposed between the front housing 21 and a needle bearing 220 interposed between the rear housing 22.

インナシャフト3は、リヤハウジング22側の端面3aから軸方向に延びる第1の中空部3bが形成され、第1の中空部3bの内面には、ストレートスプライン嵌合部3cが設けられている。第1の中空部3bには、ドライブピニオンシャフト108(図1に示す)の先端部が挿入され、ドライブピニオンシャフト108の先端部に形成されたストレートスプライン嵌合部(図示せず)が第1の中空部3bのストレートスプライン嵌合部3cに嵌合する。   The inner shaft 3 is formed with a first hollow portion 3b extending in the axial direction from the end surface 3a on the rear housing 22 side, and a straight spline fitting portion 3c is provided on the inner surface of the first hollow portion 3b. The first hollow portion 3b is inserted with the tip of a drive pinion shaft 108 (shown in FIG. 1), and a straight spline fitting portion (not shown) formed at the tip of the drive pinion shaft 108 is the first. It fits into the straight spline fitting part 3c of the hollow part 3b.

また、インナシャフト3には、フロントハウジング21側の端面3dから軸方向に延びる第2の中空部3eが形成され、この第2の中空部3eには潤滑油が収容される。第1の中空部3bと第2の中空部3eとは壁部3fによって分離されている。   Further, the inner shaft 3 is formed with a second hollow portion 3e extending in the axial direction from the end surface 3d on the front housing 21 side, and lubricating oil is accommodated in the second hollow portion 3e. The first hollow portion 3b and the second hollow portion 3e are separated by a wall portion 3f.

また、インナシャフト3の外面には、フロントハウジング21のストレートスプライン嵌合部21bと対向する部位に、ストレートスプライン嵌合部3gが形成されている。   Further, on the outer surface of the inner shaft 3, a straight spline fitting portion 3g is formed at a portion facing the straight spline fitting portion 21b of the front housing 21.

(メインクラッチ4の構成)
メインクラッチ4は、複数のアウタクラッチプレート41、及びアウタクラッチプレート41と交互に配置された複数のインナクラッチプレート42を有し、潤滑油が充填された収容空間21a内で両クラッチプレートが摺動する湿式の多板クラッチとして構成されている。
(Configuration of main clutch 4)
The main clutch 4 has a plurality of outer clutch plates 41 and a plurality of inner clutch plates 42 arranged alternately with the outer clutch plates 41, and both the clutch plates slide in an accommodation space 21a filled with lubricating oil. It is configured as a wet multi-plate clutch.

アウタクラッチプレート41は、その外周部にスプライン嵌合部41aを有し、スプライン嵌合部41aがフロントハウジング21のストレートスプライン嵌合部21bに嵌合している。これにより、アウタクラッチプレート41は、ハウジング2に対して軸方向移動可能で、ハウジング2と一体回転するように連結されている。   The outer clutch plate 41 has a spline fitting portion 41 a on the outer periphery thereof, and the spline fitting portion 41 a is fitted to the straight spline fitting portion 21 b of the front housing 21. As a result, the outer clutch plate 41 is axially movable with respect to the housing 2 and is connected to rotate integrally with the housing 2.

インナクラッチプレート42は、その内周部にスプライン嵌合部42aを有し、スプライン嵌合部42aがインナシャフト3のストレートスプライン嵌合部3gに嵌合している。これにより、インナクラッチプレート42は、インナシャフト3に対して軸方向移動可能で、インナシャフト3と一体回転するように連結されている。また、インナクラッチプレート42には、潤滑油を流通させるための孔42bが周方向の複数の箇所に形成されている。   The inner clutch plate 42 has a spline fitting portion 42 a on its inner peripheral portion, and the spline fitting portion 42 a is fitted to the straight spline fitting portion 3 g of the inner shaft 3. Thereby, the inner clutch plate 42 is axially movable with respect to the inner shaft 3 and is connected so as to rotate integrally with the inner shaft 3. Further, the inner clutch plate 42 has holes 42b through which lubricating oil is circulated at a plurality of locations in the circumferential direction.

(電磁コイル5の構成)
電磁コイル5は、ディファレンシャルキャリア107(図1に示す)に固定された炭素鋼等の磁性材料からなるヨーク51に保持されて、リヤハウジング22の収容空間22a内に配置されている。ヨーク51は、リヤハウジング22の外側部材221の内周面との間にエアギャップ51aを、内側部材223との間にエアギャップ51bをそれぞれ介在させて、内側部材223との間に設けられたシール軸受52を介してリヤハウジング22を支持している。
(Configuration of electromagnetic coil 5)
The electromagnetic coil 5 is held by a yoke 51 made of a magnetic material such as carbon steel fixed to a differential carrier 107 (shown in FIG. 1), and is disposed in a housing space 22 a of the rear housing 22. The yoke 51 is provided between the inner member 223 with an air gap 51a interposed between the yoke 51 and the inner peripheral surface of the outer member 221 of the rear housing 22 and an air gap 51b between the inner member 223 and the inner member 223. The rear housing 22 is supported via a seal bearing 52.

ヨーク51には、収容空間22aの軸方向の底部に向かって開口した環状の収容空間51cが形成され、この収容空間51cに電磁コイル5が保持されている。電磁コイル5の巻線には、ヨーク51に形成された孔51dに挿通された電線5aから供給される電流が通電される。   The yoke 51 is formed with an annular housing space 51c that opens toward the bottom in the axial direction of the housing space 22a, and the electromagnetic coil 5 is held in the housing space 51c. A current supplied from an electric wire 5 a inserted through a hole 51 d formed in the yoke 51 is energized in the winding of the electromagnetic coil 5.

(カム機構6の構成)
カム機構6は、メインクラッチ4とリヤハウジング22との間に配置され、第1カム部材61と、第2カム部材62と、第1カム部材61及び第2カム部材62の間に介在する球状のカムフォロア63とを有して構成されている。第1カム部材61はカムフォロア63よりもメインクラッチ4の側に配置され、第2カム部材62はカムフォロア63よりもリヤハウジング22の側に配置されている。
(Configuration of cam mechanism 6)
The cam mechanism 6 is disposed between the main clutch 4 and the rear housing 22, and has a spherical shape interposed between the first cam member 61, the second cam member 62, and the first cam member 61 and the second cam member 62. The cam follower 63 is configured. The first cam member 61 is disposed closer to the main clutch 4 than the cam follower 63, and the second cam member 62 is disposed closer to the rear housing 22 than the cam follower 63.

第1カム部材61は、炭素鋼等の金属材料からなる環状の部材であり、インナシャフト3に外嵌されている。第1カム部材61は、メインクラッチ4の側に設けられた押圧部611と、カムフォロア63の側に設けられたカム部612とが一体に形成されている。押圧部611には、メインクラッチ4の複数のインナクラッチプレート42のうち、最もカム機構6側に位置するインナクラッチプレート42に対向する押圧面611aが形成されている。カム部612には、カムフォロア63が転動するカム溝612aが形成されている。   The first cam member 61 is an annular member made of a metal material such as carbon steel, and is externally fitted to the inner shaft 3. The first cam member 61 is integrally formed with a pressing portion 611 provided on the main clutch 4 side and a cam portion 612 provided on the cam follower 63 side. The pressing portion 611 is formed with a pressing surface 611 a that faces the inner clutch plate 42 that is located closest to the cam mechanism 6 among the plurality of inner clutch plates 42 of the main clutch 4. A cam groove 612a in which the cam follower 63 rolls is formed in the cam portion 612.

また、第1カム部材61の押圧部611の内周側には、ストレートスプライン嵌合部611bが形成され、このストレートスプライン嵌合部611bはインナシャフト3のストレートスプライン嵌合部3gに嵌合されている。これにより、第1カム部材61はインナシャフト3に対して相対回転不能かつ軸方向移動可能であり、第1カム部材61のインナシャフト3に対する径方向の移動はストレートスプライン嵌合部3gとの嵌合により規制されている。また、第1カム部材61は皿バネ64により第2カム部材62に向かう方向に付勢されている。   Further, a straight spline fitting portion 611b is formed on the inner peripheral side of the pressing portion 611 of the first cam member 61, and this straight spline fitting portion 611b is fitted to the straight spline fitting portion 3g of the inner shaft 3. ing. Thus, the first cam member 61 is not rotatable relative to the inner shaft 3 and is movable in the axial direction, and the radial movement of the first cam member 61 with respect to the inner shaft 3 is fitted with the straight spline fitting portion 3g. It is regulated by Further, the first cam member 61 is biased in a direction toward the second cam member 62 by a disc spring 64.

第2カム部材62は、プレス成型された炭素鋼等の磁性材料からなる環状の部材であり、インナシャフト3に外嵌されている。第2カム部材62は、リヤハウジング22の摩擦面22bと摩擦係合する摩擦面621aを有する摩擦部621と、カムフォロア63が転動するカム溝622aが形成されたカム部622とが一体に形成されている。カム部622は、摩擦部621よりも内周側に形成され、その中心部にはインナシャフト3を挿通させる挿通孔623が形成されている。挿通孔623の内周面623aは、その内径が軸方向に亘って一定に形成された筒状である。   The second cam member 62 is an annular member made of a magnetic material such as press-molded carbon steel, and is externally fitted to the inner shaft 3. The second cam member 62 is integrally formed with a friction portion 621 having a friction surface 621a that frictionally engages with the friction surface 22b of the rear housing 22, and a cam portion 622 in which a cam groove 622a in which the cam follower 63 rolls is formed. Has been. The cam portion 622 is formed on the inner peripheral side with respect to the friction portion 621, and an insertion hole 623 through which the inner shaft 3 is inserted is formed in the center portion thereof. The inner peripheral surface 623a of the insertion hole 623 has a cylindrical shape whose inner diameter is formed constant over the axial direction.

また、第2カム部材62は、電磁コイル5への通電時に発生する磁力によってリヤハウジング22に引き寄せられるように軸方向に移動し、摩擦部621の摩擦面621aがリヤハウジング22の摩擦面22bと摩擦係合するように構成されている。また、第2カム部材62は皿バネ65により第1カム部材61に向かう方向に付勢されている。   Further, the second cam member 62 moves in the axial direction so as to be attracted to the rear housing 22 by the magnetic force generated when the electromagnetic coil 5 is energized, and the friction surface 621a of the friction portion 621 and the friction surface 22b of the rear housing 22 are moved. It is configured to frictionally engage. Further, the second cam member 62 is biased in a direction toward the first cam member 61 by a disc spring 65.

カムフォロア63は、炭素鋼等の金属材料からなり、第1カム部材61のカム溝612aと第2カム部材62のカム溝622aとの間に挟持され、カム溝612a及びカム溝622aを転動する。カム溝612a及びカム溝622aは周方向に延び、その中央部における軸方向の深さが最も深く、周方向の端部に向かうにつれて浅くなるように形成されている。従って、第1カム部材61と第2カム部材62が相対回転し、カムフォロア63がカム溝612a及びカム溝622aの周方向の中央部の位置(中立位置)から周方向に転動すると、第1カム部材61と第2カム部材62とを軸方向に離間させるカム力が発生する。   The cam follower 63 is made of a metal material such as carbon steel, and is sandwiched between the cam groove 612a of the first cam member 61 and the cam groove 622a of the second cam member 62, and rolls on the cam groove 612a and the cam groove 622a. . The cam groove 612a and the cam groove 622a extend in the circumferential direction, and are formed so that the axial depth is the deepest at the center and becomes shallower toward the end in the circumferential direction. Accordingly, when the first cam member 61 and the second cam member 62 rotate relative to each other and the cam follower 63 rolls in the circumferential direction from the position (neutral position) of the cam groove 612a and the cam groove 622a in the circumferential direction, A cam force that separates the cam member 61 and the second cam member 62 in the axial direction is generated.

カム溝612a及びカム溝622aは、第1カム部材61及び第2カム部材62の周方向の少なくとも3箇所に形成され、そのそれぞれにカムフォロア63が配置されている。また、カム溝612a及びカム溝622aは、径方向断面の形状がカムフォロア63の半径よりも大きな曲率半径を有する円弧面で形成されている。   The cam groove 612a and the cam groove 622a are formed in at least three locations in the circumferential direction of the first cam member 61 and the second cam member 62, and the cam follower 63 is disposed in each of them. Further, the cam groove 612 a and the cam groove 622 a are formed by arcuate surfaces whose radial cross-sectional shapes have a radius of curvature larger than the radius of the cam follower 63.

図3は、作動状態におけるカム機構6を示し、(a)はカム機構6及びその周辺部を拡大して示す拡大図、(b)はカム溝612a及びカム溝622aの周方向断面である。   3A and 3B show the cam mechanism 6 in an operating state, in which FIG. 3A is an enlarged view showing the cam mechanism 6 and its peripheral part in an enlarged manner, and FIG.

図3(a)に示すように、第1カム部材61のカム部612の内周面612b、及び第2カム部材62のカム部622の内周面623aに対向するインナシャフト3の外周面には、内周面612bに対向する大径部31と、大径部31よりもリヤハウジング22側に形成された小径部33と、大径部31から小径部33に向かって徐々に直径が小さくなるテーパ部32とが形成されている。   As shown in FIG. 3A, on the outer peripheral surface of the inner shaft 3 facing the inner peripheral surface 612b of the cam portion 612 of the first cam member 61 and the inner peripheral surface 623a of the cam portion 622 of the second cam member 62. Are a large-diameter portion 31 facing the inner peripheral surface 612b, a small-diameter portion 33 formed closer to the rear housing 22 than the large-diameter portion 31, and a diameter gradually decreasing from the large-diameter portion 31 toward the small-diameter portion 33. The taper portion 32 is formed.

第2カム部材62は、カム機構6が作動してリヤハウジング22と摩擦係合した第2位置(図3(a)に示す位置)では、その内周面623aがテーパ部32及び小径部33に面しており、大径部31には面していない。   In the second position (the position shown in FIG. 3A) where the cam mechanism 6 is actuated and frictionally engaged with the rear housing 22, the second cam member 62 has an inner peripheral surface 623 a having a tapered portion 32 and a small diameter portion 33. And does not face the large diameter portion 31.

カム機構6の作動状態では、電磁コイル5への通電により発生する磁力によって第2カム部材62がリヤハウジング22に吸引されて摩擦係合する。この状態でハウジング2とインナシャフト3が相対回転すると、図3(b)に示すようにカム溝612a及びカム溝622aをカムフォロア63が転動し、第1カム部材61と第2カム部材62とを軸方向に離間させるカム力が発生する。このカム力によって、第2カム部材62はより強くリヤハウジング22に押し付けられ、第1カム部材61は押圧部611の押圧面611aでメインクラッチ4を押圧してアウタクラッチプレート41とインナクラッチプレート42とを摩擦係合させる。   In the operating state of the cam mechanism 6, the second cam member 62 is attracted to the rear housing 22 and frictionally engaged by the magnetic force generated by energizing the electromagnetic coil 5. When the housing 2 and the inner shaft 3 rotate relative to each other in this state, the cam follower 63 rolls in the cam groove 612a and the cam groove 622a as shown in FIG. 3B, and the first cam member 61 and the second cam member 62 A cam force is generated to separate the shaft in the axial direction. Due to this cam force, the second cam member 62 is more strongly pressed against the rear housing 22, and the first cam member 61 presses the main clutch 4 with the pressing surface 611 a of the pressing portion 611 to move the outer clutch plate 41 and the inner clutch plate 42. And frictional engagement.

なお、第2カム部材62を付勢する皿バネ65は、インナシャフト3の小径部33に形成された環状溝33aに嵌着されたスナップリング66により軸方向移動が規制されている。また、第1カム部材61を付勢する皿バネ64は、大径部31と、大径部31よりも直径が大きいストレートスプライン嵌合部3gとの間に形成された段差部3hにより軸方向移動が規制されている。   The disc spring 65 that biases the second cam member 62 is restricted from moving in the axial direction by a snap ring 66 fitted in an annular groove 33 a formed in the small diameter portion 33 of the inner shaft 3. The disc spring 64 that urges the first cam member 61 is axially formed by a step portion 3h formed between the large diameter portion 31 and the straight spline fitting portion 3g having a diameter larger than that of the large diameter portion 31. Movement is restricted.

図4は、非作動状態におけるカム機構6を示し、(a)はカム機構6及びその周辺部を拡大して示す拡大図、(b)はカム溝612a及びカム溝622aの周方向断面、(c)は第2カム部材62の内周面623aとインナシャフト3との対向部をさらに拡大して示す部分拡大図である。   4A and 4B show the cam mechanism 6 in a non-operating state, in which FIG. 4A is an enlarged view showing the cam mechanism 6 and its peripheral part in an enlarged manner, and FIG. c) is a partially enlarged view showing a portion where the inner peripheral surface 623a of the second cam member 62 and the inner shaft 3 are opposed to each other.

図4(a)に示すカム機構6の非作動状態では、電磁コイル5への通電が遮断され、皿バネ65の付勢力によって第2カム部材62がリヤハウジング22から軸方向に離間し、第1カム部材61の側に向かって矢印Aの方向に移動している。この第2カム部材62の位置を第1位置とする。すなわち、第2カム部材は、カム機構6が非作動状態のときには第1カム部材61に接近した第1位置にあり、電磁コイル5に通電されると、第1位置よりも第1カム部材61から離間する方向に移動した第2位置でリヤハウジング22に摩擦係合し、カム機構6が作動する。   In the inoperative state of the cam mechanism 6 shown in FIG. 4A, the energization of the electromagnetic coil 5 is interrupted, and the second cam member 62 is separated from the rear housing 22 in the axial direction by the biasing force of the disc spring 65, and the first It moves in the direction of arrow A toward the one cam member 61 side. The position of the second cam member 62 is the first position. That is, the second cam member is in the first position close to the first cam member 61 when the cam mechanism 6 is in an inoperative state, and when the electromagnetic coil 5 is energized, the first cam member 61 is more than the first position. The cam mechanism 6 is actuated by frictional engagement with the rear housing 22 at the second position moved away from the rear housing 22.

また、カム機構6の非作動状態では、第1カム部材61が皿バネ64の付勢力によってメインクラッチ4から離れるように矢印Bの方向に移動し、アウタクラッチプレート41とインナクラッチプレート42との摩擦係合が解除される。このように、カム機構6の非作動状態では、第1カム部材61と第2カム部材62が相互に接近するように軸方向移動し、カムフォロア63は図4(b)に示す中立位置に移動する。   When the cam mechanism 6 is in an inoperative state, the first cam member 61 moves in the direction of arrow B so as to be separated from the main clutch 4 by the biasing force of the disc spring 64, and the outer clutch plate 41 and the inner clutch plate 42 Friction engagement is released. As described above, when the cam mechanism 6 is in an inoperative state, the first cam member 61 and the second cam member 62 move in the axial direction so as to approach each other, and the cam follower 63 moves to the neutral position shown in FIG. To do.

図4(c)に示すように、第2カム部材62が第1位置にあるときには、第2カム部材62の内周面623aのうち第1カム部材61側の一部である嵌合部623bがインナシャフト3の大径部31に面している。この状態では、インナシャフト3の回転軸Oに対する第2カム部材62の径方向移動が大径部31と内周面623a(第1カム部材61側の嵌合部623b)との接触によって規制される。   As shown in FIG. 4C, when the second cam member 62 is in the first position, the fitting portion 623b that is a part of the inner peripheral surface 623a of the second cam member 62 on the first cam member 61 side. Faces the large diameter portion 31 of the inner shaft 3. In this state, the radial movement of the second cam member 62 relative to the rotation axis O of the inner shaft 3 is restricted by contact between the large diameter portion 31 and the inner peripheral surface 623a (the fitting portion 623b on the first cam member 61 side). The

従って、第2カム部材62が第1位置にあるときのインナシャフト3との間の隙間は、第2カム部材62が第2位置にあるときのインナシャフト3との間の隙間よりも小さく、第2カム部材62が第1位置にあるときのインナシャフト3の回転軸Oに対する第2カム部材62の径方向の移動可能距離は、第2カム部材62が第2位置にあるときの径方向の移動可能距離よりも小さい。   Therefore, the gap between the inner shaft 3 when the second cam member 62 is in the first position is smaller than the gap between the inner shaft 3 when the second cam member 62 is in the second position, The radial movable distance of the second cam member 62 relative to the rotation axis O of the inner shaft 3 when the second cam member 62 is in the first position is the radial direction when the second cam member 62 is in the second position. It is smaller than the movable distance.

第2カム部材62の内周面623aとインナシャフト3の大径部31との間の隙間D1は、例えば0.05から0.2mmとすることが望ましい。0.05mm未満では第2カム部材62の第1位置への移動が円滑に行われなくなる可能性があり、0.2mm以上では第2カム部材62の偏心による振動を抑制する効果が十分に得られない可能性があるためである。   The gap D1 between the inner peripheral surface 623a of the second cam member 62 and the large diameter portion 31 of the inner shaft 3 is preferably set to 0.05 to 0.2 mm, for example. If it is less than 0.05 mm, the second cam member 62 may not be smoothly moved to the first position, and if it is 0.2 mm or more, a sufficient effect of suppressing vibration due to the eccentricity of the second cam member 62 can be obtained. This is because it may not be possible.

また、第2カム部材62の内周面623aとインナシャフト3の小径部32との間の隙間D2は、例えば0.2から0.5mmとすることが望ましい。0.2mm未満では第2カム部材62が第1位置から第2位置に移動する際の抵抗が十分に低減されない可能性があり、0.5mm以上では必要以上に第2カム部材62とインナシャフト3とのガタが大きくなるためである。ただし、隙間D2の値はニードル軸受220の偏芯量に応じて定めるべきである。   Further, the gap D2 between the inner peripheral surface 623a of the second cam member 62 and the small diameter portion 32 of the inner shaft 3 is preferably set to 0.2 to 0.5 mm, for example. If it is less than 0.2 mm, the resistance when the second cam member 62 moves from the first position to the second position may not be sufficiently reduced, and if it is 0.5 mm or more, the second cam member 62 and the inner shaft are more than necessary. This is because the backlash with 3 becomes large. However, the value of the gap D <b> 2 should be determined according to the amount of eccentricity of the needle bearing 220.

(駆動力伝達装置1の動作)
次に、駆動力伝達装置1の動作を説明する。4輪駆動車101のエンジン102が始動していない状態では、カム機構6は非作動状態であり、第2カム部材62は、図4(a)に示す第1位置にある。
(Operation of the driving force transmission device 1)
Next, the operation of the driving force transmission device 1 will be described. When the engine 102 of the four-wheel drive vehicle 101 is not started, the cam mechanism 6 is in an inoperative state, and the second cam member 62 is in the first position shown in FIG.

エンジン102が始動し、4輪駆動車101が発進する際には、前輪及び後輪を駆動する4輪駆動状態とすべく、コントローラ112が駆動力伝達装置1の電磁コイル5に電流を供給し、通電する。この通電により、図2に点線で示すように、ヨーク51,リヤハウジング22の外側部材221,第2カム部材62,及びリヤハウジング22の内側部材223により形成される磁路に磁束Mが発生し、第2カム部材62が図3(a)に示す第2位置に移動し、第2カム部材62の摩擦面621aとリヤハウジング22の摩擦面22bとが摩擦係合する。   When the engine 102 starts and the four-wheel drive vehicle 101 starts, the controller 112 supplies a current to the electromagnetic coil 5 of the driving force transmission device 1 so as to set the four-wheel drive state in which the front wheels and the rear wheels are driven. Energize. This energization generates a magnetic flux M in a magnetic path formed by the yoke 51, the outer member 221 of the rear housing 22, the second cam member 62, and the inner member 223 of the rear housing 22, as indicated by a dotted line in FIG. The second cam member 62 is moved to the second position shown in FIG. 3A, and the friction surface 621a of the second cam member 62 and the friction surface 22b of the rear housing 22 are frictionally engaged.

この状態でハウジング2とインナシャフト3が差動回転すると、図3(b)に示すように、カムフォロア63がカム溝612a及びカム溝622aを転動し、第1カム部材61と第2カム部材62とを軸方向に離間させるカム力が発生する。このカム力により第2カム部材62はリヤハウジング22に押し付けられて摩擦係合し、第1カム部材61はメインクラッチ4を押圧する。第1カム部材61がメインクラッチ4を押圧することでアウタクラッチプレート41とインナクラッチプレート42とが摩擦係合してトルク伝達可能な状態となり、プロペラシャフト106を介して伝達されたエンジン102のトルクがドライブピニオンシャフト108に伝達され、4輪駆動状態となる。   When the housing 2 and the inner shaft 3 are differentially rotated in this state, as shown in FIG. 3B, the cam follower 63 rolls on the cam groove 612a and the cam groove 622a, and the first cam member 61 and the second cam member. A cam force is generated that separates 62 from the axial direction. By this cam force, the second cam member 62 is pressed against the rear housing 22 and frictionally engaged, and the first cam member 61 presses the main clutch 4. When the first cam member 61 presses the main clutch 4, the outer clutch plate 41 and the inner clutch plate 42 are frictionally engaged to transmit torque, and the torque of the engine 102 transmitted via the propeller shaft 106 is obtained. Is transmitted to the drive pinion shaft 108 to be in a four-wheel drive state.

また、コントローラ112は、例えば4輪駆動車101が一定の車速で直進する定常走行状態となると、燃費向上のために一対の前輪105のみを駆動する2輪駆動状態とすべく、電磁コイル5への通電を遮断する。   Further, for example, when the four-wheel drive vehicle 101 is in a steady running state in which the four-wheel drive vehicle 101 goes straight at a constant vehicle speed, the controller 112 supplies the electromagnetic coil 5 to a two-wheel drive state in which only the pair of front wheels 105 are driven to improve fuel efficiency. Shut off the power of the.

電磁コイル5への通電が遮断されると、皿バネ65の付勢力によって第2カム部材62が図4(a)に示す第1位置へ移動する。この際、第2カム部材62はインナシャフト3のテーパ部32に案内されて、第2カム部材62の内周面623aのうち第1カム部材61側の嵌合部623bがインナシャフト3の大径部31の外周面に嵌合される。   When the energization of the electromagnetic coil 5 is interrupted, the second cam member 62 is moved to the first position shown in FIG. At this time, the second cam member 62 is guided by the tapered portion 32 of the inner shaft 3, and the fitting portion 623 b on the first cam member 61 side of the inner peripheral surface 623 a of the second cam member 62 is large in the inner shaft 3. The outer peripheral surface of the diameter portion 31 is fitted.

また、例えば4輪駆動車101の一対の前輪105の何れかにスリップが発生したこと等により、コントローラ112が電磁コイル5への通電を再開すると、第2カム部材62がリヤハウジング22に引き寄せられ、カム機構6が作動し、メインクラッチ4がトルク伝達可能な状態となって、4輪駆動車101が4輪駆動状態となる。   Further, when the controller 112 resumes energization to the electromagnetic coil 5 due to, for example, a slip occurring in one of the pair of front wheels 105 of the four-wheel drive vehicle 101, the second cam member 62 is attracted to the rear housing 22. Then, the cam mechanism 6 operates, the main clutch 4 is in a state where torque can be transmitted, and the four-wheel drive vehicle 101 enters the four-wheel drive state.

(第1の実施の形態の効果)
以上説明した本発明の第1の実施の形態によれば、次に示す効果が得られる。
(Effects of the first embodiment)
According to the first embodiment of the present invention described above, the following effects can be obtained.

(1)第2カム部材62が第2位置から第1位置へ移動する際に、第2カム部材62がインナシャフト3のテーパ部32に案内され、第2カム部材62の内周面623aの嵌合部623bがインナシャフト3の大径部31の外周面に嵌合される。これにより、カム機構6の非作動状態における第2カム部材62のインナシャフト3の回転軸Oに対する偏心が抑制され、4輪駆動車101の走行時における振動が抑制される。 (1) When the second cam member 62 moves from the second position to the first position, the second cam member 62 is guided by the tapered portion 32 of the inner shaft 3, and the inner peripheral surface 623 a of the second cam member 62 is The fitting portion 623 b is fitted to the outer peripheral surface of the large diameter portion 31 of the inner shaft 3. As a result, the eccentricity of the second cam member 62 with respect to the rotation axis O of the inner shaft 3 when the cam mechanism 6 is in an inoperative state is suppressed, and vibration when the four-wheel drive vehicle 101 is traveling is suppressed.

(2)カム機構6の作動状態において、インナシャフト3の大径部31の外周面に嵌合されるのは、第2カム部材62の内周面623aのうち第1カム部材61側の一部のみであるので、例えば第2カム部材の内周面623aの全体が大径部31の外周面に嵌合される場合に比較して、第2カム部材62の軸方向移動の抵抗が低減され、第2カム部材62が円滑かつ迅速に第1位置と第2位置との間で移動可能である。 (2) In the operating state of the cam mechanism 6, it is fitted to the outer peripheral surface of the large-diameter portion 31 of the inner shaft 3 on the first cam member 61 side of the inner peripheral surface 623 a of the second cam member 62. Therefore, the resistance of the second cam member 62 to move in the axial direction is reduced as compared with the case where the entire inner peripheral surface 623a of the second cam member is fitted to the outer peripheral surface of the large-diameter portion 31, for example. Thus, the second cam member 62 can move smoothly and quickly between the first position and the second position.

(3)第2カム部材62が第1位置から第2位置へ移動する際には、第2カム部材62の回転軸Oに対する偏心が抑制された状態からリヤハウジング22に引き寄せられるので、第2カム部材62がリヤハウジング22に摩擦係合した状態においても、第2カム部材62の偏心が抑制される。 (3) When the second cam member 62 moves from the first position to the second position, the second cam member 62 is attracted to the rear housing 22 from a state in which the eccentricity of the second cam member 62 with respect to the rotation axis O is suppressed. Even when the cam member 62 is frictionally engaged with the rear housing 22, the eccentricity of the second cam member 62 is suppressed.

(4)インナシャフト3の大径部31と小径部33との間には、大径部31から小径部33に向かって徐々に直径が小さくなるテーパ部32が形成されているので、例えば大径部31と小径部33との間に段差が形成されている場合に比較して、第2カム部材62の内周面623aが大径部31に円滑に嵌合されやすくなる。 (4) Since the taper portion 32 whose diameter gradually decreases from the large diameter portion 31 toward the small diameter portion 33 is formed between the large diameter portion 31 and the small diameter portion 33 of the inner shaft 3. Compared to the case where a step is formed between the diameter portion 31 and the small diameter portion 33, the inner peripheral surface 623 a of the second cam member 62 is easily fitted into the large diameter portion 31.

[第2の実施の形態]
図5は、本発明の第2の実施の形態に係る電磁クラッチ11の概略構成を示す。この電磁クラッチ11は、軸状の回転部材8を非回転部材であるケーシング9に対して回り止めをするためのブレーキ装置として機能し、例えば遊星歯車機構によるトルク伝達の経路を切り替えるため等に用いられる。
[Second Embodiment]
FIG. 5 shows a schematic configuration of the electromagnetic clutch 11 according to the second embodiment of the present invention. The electromagnetic clutch 11 functions as a brake device for preventing the shaft-like rotating member 8 from rotating with respect to the casing 9 which is a non-rotating member, and is used, for example, to switch a torque transmission path by a planetary gear mechanism. It is done.

電磁クラッチ11は、回転部材8と、回転部材8を挿通する挿通孔が形成された円板状の第1カム部材71及び第2カム部材72と、第1カム部材71と第2カム部材72との間に介在する球状のカムフォロア73と、第2カム部材72を軸方向移動させる磁力を発生する電磁コイル74と、電磁コイル74を保持する磁性材料からなるヨーク75とを備えて構成されている。   The electromagnetic clutch 11 includes a rotating member 8, disk-shaped first cam members 71 and second cam members 72 each having an insertion hole through which the rotating member 8 is inserted, and the first cam member 71 and the second cam member 72. A spherical cam follower 73 interposed therebetween, an electromagnetic coil 74 for generating a magnetic force for moving the second cam member 72 in the axial direction, and a yoke 75 made of a magnetic material for holding the electromagnetic coil 74. Yes.

回転部材8は、軸方向の一端部8aがケーシング9の凹部9aに固定されたボール軸受90により支持され、ケーシング9に対して回転可能である。回転部材8には、大径部81と、大径部81の一端部8a側に形成され、大径部81よりも小径の小径部83と、大径部81から小径部83に向かって徐々に径が小さくなるテーパ部82とが形成されている。   The rotating member 8 is supported by a ball bearing 90 whose one end 8 a in the axial direction is fixed to the recess 9 a of the casing 9, and is rotatable with respect to the casing 9. The rotating member 8 is formed on the large diameter portion 81, one end portion 8 a side of the large diameter portion 81, and has a smaller diameter portion 83 having a smaller diameter than the large diameter portion 81, and gradually from the large diameter portion 81 toward the small diameter portion 83. A tapered portion 82 having a smaller diameter is formed.

第1カム部材71は、スナップリング80によって軸方向移動が規制され、回転部材8の大径部81の外周面に相対回転不能かつ軸方向移動不能に固定されている。第1カム部材71の一側面には、カム溝71aが形成されている。   The first cam member 71 is restricted from moving in the axial direction by the snap ring 80 and is fixed to the outer peripheral surface of the large-diameter portion 81 of the rotating member 8 so as not to be relatively rotatable and axially movable. A cam groove 71 a is formed on one side surface of the first cam member 71.

第2カム部材72は、回転部材8の回転軸Oに沿って第1カム部材71と並置され、中心部に形成された挿通孔720に回転部材8が挿通されて回転部材8に対して軸方向移動可能である。第2カム部材72の第1カム部材71に対向する一側面にはカム溝72aが形成され、カム溝72aと第1カム部材71のカム溝71aとの間にはカムフォロア73が介在している。第2カム部材72は、第1カム部材71に対して、カム溝72aをカムフォロア73が転動する範囲で相対回転可能である。また、第2カム部材72のカム溝72aが形成された側面とは反対側の側面には、ヨーク75に当接して摩擦係合する摩擦面72bが形成されている。 The second cam member 72 is juxtaposed with the first cam member 71 along the rotation axis O 2 of the rotation member 8, and the rotation member 8 is inserted into the insertion hole 720 formed in the center portion with respect to the rotation member 8. Axial movement is possible. A cam groove 72 a is formed on one side surface of the second cam member 72 facing the first cam member 71, and a cam follower 73 is interposed between the cam groove 72 a and the cam groove 71 a of the first cam member 71. . The second cam member 72 can rotate relative to the first cam member 71 within a range in which the cam follower 73 rolls in the cam groove 72a. Further, a friction surface 72b that abuts against the yoke 75 and frictionally engages is formed on the side surface of the second cam member 72 opposite to the side surface where the cam groove 72a is formed.

ヨーク75は、第2カム部材72の摩擦面72bに対向して配置され、ボルト91によってケーシング9に相対回転不能かつ軸方向移動不能に固定されている。ヨーク75は、電磁コイル74を保持する保持部751と、保持部751から径方向の内側に延びるように形成された鍔部752とが一体に形成されている。   The yoke 75 is disposed so as to face the friction surface 72b of the second cam member 72, and is fixed to the casing 9 by a bolt 91 so that it cannot be rotated relative to the casing 9 but cannot move in the axial direction. The yoke 75 is integrally formed with a holding portion 751 that holds the electromagnetic coil 74 and a flange portion 752 that is formed so as to extend radially inward from the holding portion 751.

保持部751には、第2カム部材72の側に開口した環状凹部75aが形成されている。環状凹部75aの開口部の外周側及び内周側には、第2カム部材72の摩擦面72bと摩擦係合する摩擦面75b及び摩擦面75cが形成されている。   The holding portion 751 is formed with an annular recess 75a that opens to the second cam member 72 side. A friction surface 75b and a friction surface 75c that frictionally engage with the friction surface 72b of the second cam member 72 are formed on the outer peripheral side and the inner peripheral side of the opening of the annular recess 75a.

鍔部752の第2カム部材72側の面752aに接するようにニードル軸受76が配置され、このニードル軸受76と第2カム部材72との間に皿バネ77が配置されている。皿バネ77は、第2カム部材72をヨーク75から離れる方向に付勢している。   A needle bearing 76 is disposed so as to contact the surface 752 a of the flange portion 752 on the second cam member 72 side, and a disc spring 77 is disposed between the needle bearing 76 and the second cam member 72. The disc spring 77 biases the second cam member 72 away from the yoke 75.

電磁コイル74は、ヨーク75の環状凹部75aに収容され、スナップリング751によって抜け止めされている。電磁コイル74には、図略の電線によって電流が供給される。電磁コイル74に通電されると、図5に破線で示すように、ヨーク75及び第2カム部材72により形成される磁路に磁束Mが発生し、第2カム部材72がヨーク75の側に引き寄せられ、第2カム部材72の摩擦面72bとヨーク75の摩擦面75b及び摩擦面75cとが摩擦係合する。この状態における第2カム部材72の位置を第2位置とする。第2位置では、第2カム部材72の挿通孔720の内周面720aが回転部材8のテーパ部82及び小径部83に面している。 The electromagnetic coil 74 is accommodated in the annular recess 75 a of the yoke 75 and is prevented from coming off by a snap ring 751. A current is supplied to the electromagnetic coil 74 by an unillustrated electric wire. When the electromagnetic coil 74 is energized, a magnetic flux M 2 is generated in the magnetic path formed by the yoke 75 and the second cam member 72 as shown by a broken line in FIG. The friction surface 72b of the second cam member 72 and the friction surface 75b and the friction surface 75c of the yoke 75 are frictionally engaged with each other. The position of the second cam member 72 in this state is defined as a second position. In the second position, the inner peripheral surface 720 a of the insertion hole 720 of the second cam member 72 faces the tapered portion 82 and the small diameter portion 83 of the rotating member 8.

第2カム部材72の摩擦面72bとヨーク75の摩擦面75b及び摩擦面75cとが摩擦係合した状態で回転部材8が回転すると、第1カム部材71と第2カム部材72とが相対回転し、カム溝72aとカム溝71aとの間をカムフォロア73が転動し、第1カム部材71と第2カム部材72とを離間させるカム力が発生する。このカム力により、第2カム部材72がより強くヨーク75に押し付けられ、摩擦面72bと摩擦面75b及び摩擦面75cとの摩擦力が増大する。前述のようにヨーク75はケーシング9に対して相対回転不能であり、第1カム部材71と第2カム部材72とはカムフォロア73が転動する範囲(例えば60°)でのみ相対回転可能であるので、回転部材8がケーシング9に対して回り止めされる。   When the rotating member 8 rotates while the friction surface 72b of the second cam member 72 and the friction surface 75b and the friction surface 75c of the yoke 75 are frictionally engaged, the first cam member 71 and the second cam member 72 rotate relative to each other. Then, the cam follower 73 rolls between the cam groove 72a and the cam groove 71a, and a cam force for separating the first cam member 71 and the second cam member 72 is generated. Due to this cam force, the second cam member 72 is more strongly pressed against the yoke 75, and the friction force between the friction surface 72b, the friction surface 75b, and the friction surface 75c increases. As described above, the yoke 75 is not rotatable relative to the casing 9, and the first cam member 71 and the second cam member 72 are relatively rotatable only within a range in which the cam follower 73 rolls (for example, 60 °). Therefore, the rotating member 8 is prevented from rotating with respect to the casing 9.

図6は、電磁コイル74への通電が遮断され、電磁クラッチ11が開放された状態を示す。電磁コイル74への通電が遮断されると、皿バネ77の付勢力によって第2カム部材72がヨーク75から離間ように矢印Cの方向に移動する。すると回転部材8が第1カム部材71及び第2カム部材72がと共に回転可能となる。この状態における第2カム部材72の位置を第1位置とする。第1位置では、第2カム部材72の挿通孔720の内周面720aの一部である嵌合部720bが回転部材8の大径部81の外周面に面し、内周面720aの他の部分はテーパ部82及び小径部83の外周面に面している。   FIG. 6 shows a state where the energization to the electromagnetic coil 74 is cut off and the electromagnetic clutch 11 is released. When the energization of the electromagnetic coil 74 is interrupted, the second cam member 72 is moved in the direction of arrow C so as to be separated from the yoke 75 by the biasing force of the disc spring 77. Then, the rotating member 8 can rotate together with the first cam member 71 and the second cam member 72. The position of the second cam member 72 in this state is defined as the first position. In the first position, the fitting portion 720b, which is a part of the inner peripheral surface 720a of the insertion hole 720 of the second cam member 72, faces the outer peripheral surface of the large-diameter portion 81 of the rotating member 8, and other than the inner peripheral surface 720a. This portion faces the outer peripheral surfaces of the tapered portion 82 and the small diameter portion 83.

第1位置では、第2カム部材72の回転部材8に対する軸方向移動が第2カム部材72の内周面720aと回転部材8の大径部81の外周面との隙間によって規制される。また、第2位置では、第2カム部材72の回転部材8に対する軸方向移動が第2カム部材72の内周面720aと回転部材8のテーパ部82の外周面との隙間によって規制される。従って、回転部材8の回転軸Oに対する第2カム部材72の径方向の移動可能距離は、第2位置よりも第1位置で小さくなる。 In the first position, the axial movement of the second cam member 72 relative to the rotating member 8 is restricted by the gap between the inner peripheral surface 720 a of the second cam member 72 and the outer peripheral surface of the large-diameter portion 81 of the rotating member 8. In the second position, the axial movement of the second cam member 72 relative to the rotating member 8 is restricted by the gap between the inner peripheral surface 720 a of the second cam member 72 and the outer peripheral surface of the tapered portion 82 of the rotating member 8. Therefore, the movable distance in the radial direction of the second cam member 72 with respect to the rotation axis O 2 of the rotating member 8 is smaller at the first position than at the second position.

(第2の実施の形態の効果)
以上説明した本発明の第2の実施の形態によれば、次に示す効果が得られる。
(Effect of the second embodiment)
According to the second embodiment of the present invention described above, the following effects can be obtained.

(1)第2カム部材72が第2位置から第1位置へ移動する際に、第2カム部材72が回転部材8のテーパ部82に案内され、第2カム部材72の内周面720aの一部(嵌合部720b)が回転部材8の大径部81の外周面に嵌合される。これにより、電磁コイル74に通電されていない非作動状態における第2カム部材72の回転部材8の回転軸O2に対する偏心が抑制され、回転アンバランスによる振動が抑制される。 (1) When the second cam member 72 moves from the second position to the first position, the second cam member 72 is guided by the tapered portion 82 of the rotating member 8, and the inner peripheral surface 720a of the second cam member 72 is A part (fitting portion 720 b) is fitted to the outer peripheral surface of the large-diameter portion 81 of the rotating member 8. Thereby, the eccentricity with respect to the rotating shaft O2 of the rotating member 8 of the 2nd cam member 72 in the non-operating state in which the electromagnetic coil 74 is not energized is suppressed, and vibration due to rotational imbalance is suppressed.

(2)電磁コイル74に通電された作動状態において、回転部材8の大径部81の外周面に嵌合されるのは、第2カム部材72の内周面720aのうち第1カム部材71側の一部のみであるので、例えば第2カム部材の内周面720aの全体が大径部81の外周面に嵌合される場合に比較して、第2カム部材72の軸方向移動の抵抗が低減され、第2カム部材72が円滑かつ迅速に第1位置と第2位置との間で移動可能である。 (2) In the operating state in which the electromagnetic coil 74 is energized, the first cam member 71 of the inner peripheral surface 720 a of the second cam member 72 is fitted to the outer peripheral surface of the large-diameter portion 81 of the rotating member 8. For example, compared with the case where the entire inner peripheral surface 720a of the second cam member is fitted to the outer peripheral surface of the large-diameter portion 81, the second cam member 72 is moved in the axial direction. The resistance is reduced, and the second cam member 72 can move smoothly and quickly between the first position and the second position.

(3)回転部材8の大径部81と小径部83との間には、大径部81から小径部83に向かって徐々に直径が小さくなるテーパ部82が形成されているので、例えば大径部81と小径部83との間に段差が形成されている場合に比較して、第2カム部材72の内周面720aが大径部81に円滑に嵌合されやすくなる。 (3) Since a taper portion 82 whose diameter gradually decreases from the large diameter portion 81 toward the small diameter portion 83 is formed between the large diameter portion 81 and the small diameter portion 83 of the rotating member 8. Compared to the case where a step is formed between the diameter portion 81 and the small diameter portion 83, the inner peripheral surface 720 a of the second cam member 72 is easily fitted into the large diameter portion 81.

[第3の実施の形態]
図7は、本発明の第3の実施の形態に係る電磁クラッチの概略構成を示し、(a)は作動状態を、(b)は非作動状態を示す。
[Third Embodiment]
FIG. 7 shows a schematic configuration of an electromagnetic clutch according to a third embodiment of the present invention, where (a) shows an operating state and (b) shows a non-operating state.

上記第2の実施の形態では、回転部材8の大径部81と小径部83との間にテーパ部82を設けたが、本実施の形態では大径部81と小径部83との間に段差部84が形成され、テーパ部82は設けられていない。また、第2カム部材72の挿通孔721には、小径部722と、小径部722から第1カム部材71の側に向かってテーパ状に拡径するテーパ部723とが形成されている。その他の構成は第2の実施の形態と共通するので、図5及び図6と同一の符号を付して説明を省略する。   In the second embodiment, the tapered portion 82 is provided between the large-diameter portion 81 and the small-diameter portion 83 of the rotating member 8, but in the present embodiment, between the large-diameter portion 81 and the small-diameter portion 83. A stepped portion 84 is formed, and the tapered portion 82 is not provided. Further, the insertion hole 721 of the second cam member 72 is formed with a small diameter portion 722 and a tapered portion 723 that increases in diameter from the small diameter portion 722 toward the first cam member 71 in a tapered shape. Since the other configuration is common to the second embodiment, the same reference numerals as those in FIG. 5 and FIG.

図7(a)に示す作動状態では、電磁コイル74に通電されて磁束Mが発生し、第2カム部材72が第2位置でヨーク75に摩擦係合して、回転部材8が回り止めされている。小径部722は、回転部材8の小径部83に面しており、大径部81には面していない。また、回転部材8の段差部84の外周側には第2カム部材72テーパ部723が位置している。 In the operating state shown in FIG. 7 (a), the magnetic flux M 3 generated is energized electromagnetic coil 74, the second cam member 72 is frictionally engaged to the yoke 75 in the second position, stopping the rotation member 8 around Has been. The small diameter portion 722 faces the small diameter portion 83 of the rotating member 8 and does not face the large diameter portion 81. Further, the second cam member 72 taper portion 723 is located on the outer peripheral side of the step portion 84 of the rotating member 8.

図7(b)に示す非作動状態では、電磁コイル74への通電が遮断され、第2カム部材72は、皿バネ77の付勢力によって回転部材8の回転軸Oに沿って矢印D方向に移動する。このようにして第2カム部材72が図7(b)に示す第1位置まで移動した状態では、回転部材8は第1カム部材71及び第2カム部材72と共に回転可能であり、第2カム部材72の小径部722のテーパ部723側の一部である嵌合部723aは、回転部材8の大径部81の外周面に嵌合される。 In the non-actuated state shown in FIG. 7B, the energization to the electromagnetic coil 74 is interrupted, and the second cam member 72 is moved in the direction of arrow D along the rotation axis O 3 of the rotating member 8 by the biasing force of the disc spring 77. Move to. When the second cam member 72 is moved to the first position shown in FIG. 7B in this way, the rotating member 8 can rotate together with the first cam member 71 and the second cam member 72, and the second cam. A fitting portion 723 a that is a part of the small diameter portion 722 of the member 72 on the tapered portion 723 side is fitted to the outer peripheral surface of the large diameter portion 81 of the rotating member 8.

(第3の実施の形態の効果)
以上説明した本発明の第3の実施の形態によれば、上記の第2の実施の形態の効果(1)及び(2)と同様の効果がある。また、第2カム部材72の挿通孔721に小径部722とテーパ部723とを設けたので、第2カム部材72が第2位置から第1位置に移動する際には、テーパ部723が回転部材8の段差部84の大径部81側に接触し、第2カム部材72の小径部722が大径部81に円滑に嵌合されるように案内される。
(Effect of the third embodiment)
According to the third embodiment of the present invention described above, there are the same effects as the effects (1) and (2) of the second embodiment. Further, since the small diameter portion 722 and the tapered portion 723 are provided in the insertion hole 721 of the second cam member 72, the tapered portion 723 rotates when the second cam member 72 moves from the second position to the first position. The small diameter portion 722 of the second cam member 72 is guided so as to be smoothly fitted into the large diameter portion 81 by contacting the large diameter portion 81 side of the stepped portion 84 of the member 8.

[他の実施の形態]
以上、本発明の電磁クラッチを上記の実施の形態に基づいて説明したが、本発明は上記の実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々の態様において実施することが可能であり、例えば次に示すような変形も可能である。
[Other embodiments]
As mentioned above, although the electromagnetic clutch of this invention was demonstrated based on said embodiment, this invention is not limited to said embodiment, It implements in a various aspect in the range which does not deviate from the summary. For example, the following modifications are possible.

(1)上記各実施の形態では、第1カム部材と第2カム部材との間に球状のカムフォロアを介在させたが、これに限らず、第1カム部材と第2カム部材との対向面のそれぞれに軸方向に対して傾斜した傾斜面を形成し、傾斜面同士の摺動によりカム力を発生させるようにしてもよい。 (1) In each of the embodiments described above, the spherical cam follower is interposed between the first cam member and the second cam member. However, the present invention is not limited to this, and the opposing surfaces of the first cam member and the second cam member An inclined surface that is inclined with respect to the axial direction may be formed on each of these, and a cam force may be generated by sliding between the inclined surfaces.

(2)上記各実施の形態では、電磁コイルへの通電時に第2カム部材がリヤハウジング又はヨークに摩擦係合し、非通電時には皿バネの付勢力によって摩擦係合が解除されるように構成したが、これとは逆に、電磁コイルへの非通電時に皿バネ等の弾性部材の付勢力によって第2カム部材が他の部材に摩擦係合し、電磁コイルへの通電時に磁力によって摩擦係合が解除されるように構成してもよい。 (2) In each of the above embodiments, the second cam member is frictionally engaged with the rear housing or the yoke when the electromagnetic coil is energized, and the frictional engagement is released by the biasing force of the disc spring when deenergized. However, on the contrary, the second cam member is frictionally engaged with other members by the biasing force of the elastic member such as a disc spring when the electromagnetic coil is not energized, and the magnetic force is applied by the magnetic force when the electromagnetic coil is energized. You may comprise so that a match may be cancelled | released.

(3)上記各実施の形態では、第2カム部材の摩擦面をカム溝よりも外周側に形成したが、摩擦面はカム溝の裏側に対応する部位に形成されてもよく、また、摩擦面はカム溝よりも内周側に形成してもよい。 (3) In each of the above embodiments, the friction surface of the second cam member is formed on the outer peripheral side of the cam groove. However, the friction surface may be formed on a portion corresponding to the back side of the cam groove, and the friction surface The surface may be formed on the inner peripheral side of the cam groove.

(4)上記各実施の形態では、回転部材又は第2カム部材の一方にテーパ部を設けたが、これら両部材にテーパ部を設けてもよい。 (4) In each of the above embodiments, the tapered portion is provided on one of the rotating member and the second cam member, but the tapered portion may be provided on both of these members.

(5)上記各実施の形態では、第2カム部材の挿通孔の内周面の一部が回転部材の大径部に嵌合されるように構成したが、挿通孔の内周面の全体が回転部材の大径部に嵌合されるように構成してもよい。 (5) In each of the above embodiments, a part of the inner peripheral surface of the insertion hole of the second cam member is configured to be fitted to the large diameter portion of the rotating member, but the entire inner peripheral surface of the insertion hole is May be configured to be fitted to the large-diameter portion of the rotating member.

(6)上記各実施の形態では、第2カム部材が第2位置にあるときに、その内周面が回転部材のテーパ部及び小径部に面するように構成したが、第2カム部材の内周面は第2位置においてテーパ部のみに面するようにしてもよい。 (6) In each of the above embodiments, when the second cam member is in the second position, the inner peripheral surface thereof faces the tapered portion and the small diameter portion of the rotating member. The inner peripheral surface may face only the tapered portion at the second position.

(7)上記各実施の形態では、回転部材の大径部は円筒状又は円柱状に形成したが、大径部の軸直交断面は円形に限らず、回転軸からの距離が最も大きい部分の回転軸からの距離が小径部よりも大きくなるように形成された多角形状や、周方向の一部に突起を有する形状であってもよい。 (7) In each of the above embodiments, the large-diameter portion of the rotating member is formed in a cylindrical shape or a columnar shape, but the axis-orthogonal cross section of the large-diameter portion is not limited to a circle, The polygonal shape formed so that the distance from a rotating shaft may become larger than a small diameter part, or the shape which has a processus | protrusion in a part of circumferential direction may be sufficient.

(8)電磁クラッチの用途及び適用対象についても特に制限はない。 (8) There are no particular restrictions on the use and application object of the electromagnetic clutch.

1…駆動力伝達装置、2…ハウジング、3…インナシャフト、3a…端面、3b…中空部、3c…ストレートスプライン嵌合部、3d…端面、3e…中空部、3f…壁部、3g…ストレートスプライン嵌合部、3h…段差部、4…メインクラッチ、5…電磁コイル、5a…電線、6…カム機構、8…回転部材、8a…端部、9…ケーシング、9a…凹部、10,11…電磁クラッチ、21…フロントハウジング、21…リヤハウジング、21…フロントハウジング、21a…収容空間、21b…ストレートスプライン嵌合部、22…リヤハウジング、22a…収容空間、22b…摩擦面、31…大径部、32…テーパ部、32…小径部、32…テーパ部、33…小径部、33a…環状溝、41…アウタクラッチプレート、41a…スプライン嵌合部、42…インナクラッチプレート、42a…スプライン嵌合部、42b…孔、51…ヨーク、51a…エアギャップ、51b…エアギャップ、51c…収容空間、51d…孔、52…シール軸受、61…第1カム部材、62…第2カム部材、63…カムフォロア、64…皿バネ、65…皿バネ、66…スナップリング、71…第1カム部材、71a…カム溝、72…第2カム部材、72a…カム溝、72b…摩擦面、73…カムフォロア、74…電磁コイル、75…ヨーク、75a…環状凹部、75b…摩擦面、75c…摩擦面、76…ニードル軸受、77…皿バネ、80…スナップリング、81…大径部、82…テーパ部、83…小径部、84…段差部、90…ボール軸受、91…ボルト、101…4輪駆動車、102…エンジン、103…トランスアクスル、104…前輪、105…後輪、106…ディファレンシャルキャリア、107…プロペラシャフト、108…ドライブピニオンシャフト、109…フロントアクスルシャフト、110…リヤディファレンシャル、111…リヤアクスルシャフト、112…コントローラ、210…ボール軸受、220…ニードル軸受、221…外側部材、222…中間部材、223…内側部材、611…押圧部、611a…押圧面、611b…ストレートスプライン嵌合部、612…カム部、612a…カム溝、612b…内周面、621…摩擦部、621a…摩擦面、622…カム部、622a…カム溝、623…挿通孔、623a…内周面、623b…嵌合部、720…挿通孔、720a…内周面、720b…嵌合部、721…挿通孔、722…小径部、723…テーパ部、751…保持部、751…スナップリング、752…鍔部、752a…面、D1…隙間、D2…隙間、M…磁束、M…磁束、O…回転軸、O…回転軸、O…回転軸 DESCRIPTION OF SYMBOLS 1 ... Driving force transmission device, 2 ... Housing, 3 ... Inner shaft, 3a ... End surface, 3b ... Hollow part, 3c ... Straight spline fitting part, 3d ... End surface, 3e ... Hollow part, 3f ... Wall part, 3g ... Straight Spline fitting part, 3h ... step part, 4 ... main clutch, 5 ... electromagnetic coil, 5a ... electric wire, 6 ... cam mechanism, 8 ... rotating member, 8a ... end, 9 ... casing, 9a ... recess, 10,11 ... Electromagnetic clutch, 21 ... Front housing, 21 ... Rear housing, 21 ... Front housing, 21a ... Accommodating space, 21b ... Straight spline fitting part, 22 ... Rear housing, 22a ... Accommodating space, 22b ... Friction surface, 31 ... Large Diameter portion, 32 ... taper portion, 32 ... small diameter portion, 32 ... taper portion, 33 ... small diameter portion, 33a ... annular groove, 41 ... outer clutch plate, 41a ... spline Joint part 42 ... Inner clutch plate 42a ... Spline fitting part 42b ... Hole 51 ... Yoke 51a ... Air gap 51b ... Air gap 51c ... Storage space 51d ... Hole 52 ... Seal bearing 61 ... 1st cam member, 62 ... 2nd cam member, 63 ... Cam follower, 64 ... Belleville spring, 65 ... Belleville spring, 66 ... Snap ring, 71 ... 1st cam member, 71a ... Cam groove, 72 ... 2nd cam member, 72a ... cam groove, 72b ... friction surface, 73 ... cam follower, 74 ... electromagnetic coil, 75 ... yoke, 75a ... annular recess, 75b ... friction surface, 75c ... friction surface, 76 ... needle bearing, 77 ... disc spring, 80 ... Snap ring, 81 ... large diameter portion, 82 ... tapered portion, 83 ... small diameter portion, 84 ... stepped portion, 90 ... ball bearing, 91 ... bolt, 101 ... four-wheel drive vehicle, 102 ... engine, 03 ... transaxle, 104 ... front wheel, 105 ... rear wheel, 106 ... differential carrier, 107 ... propeller shaft, 108 ... drive pinion shaft, 109 ... front axle shaft, 110 ... rear differential, 111 ... rear axle shaft, 112 ... controller, 210 ... ball bearing, 220 ... needle bearing, 221 ... outer member, 222 ... intermediate member, 223 ... inner member, 611 ... pressing portion, 611a ... pressing surface, 611b ... straight spline fitting portion, 612 ... cam portion, 612a ... Cam groove, 612b ... inner peripheral surface, 621 ... friction part, 621a ... friction surface, 622 ... cam part, 622a ... cam groove, 623 ... insertion hole, 623a ... inner peripheral surface, 623b ... fitting part, 720 ... insertion hole 720a ... inner peripheral surface, 720b ... fitting part, 721 ... Insertion hole, 722 ... small diameter part, 723 ... taper part, 751 ... holding part, 751 ... snap ring, 752 ... collar part, 752a ... surface, D1 ... gap, D2 ... gap, M ... magnetic flux, M 2 ... magnetic flux, O ... Rotation axis, O 2 ... Rotation axis, O 3 ... Rotation axis

Claims (3)

軸状の回転部材と、
前記回転部材の外周に、前記回転部材と一体回転するように設けられた第1カム部材と、
前記回転部材が挿通される挿通孔が形成され、前記第1カム部材との距離が接近した第1位置、及び前記第1カム部材との距離が前記第1位置よりも離間した第2位置の間を軸方向移動可能に配置され、前記第1カム部材との相対回転により軸方向のカム力を発生させる第2カム部材と、
前記第2カム部材を軸方向移動させる磁力を発生する電磁コイルと、を備え、
前記回転部材は、その回転軸に対する前記第2カム部材の径方向の移動可能距離が前記第2位置よりも前記第1位置で小さくなる形状に形成された電磁クラッチ。
An axial rotating member;
A first cam member provided on the outer periphery of the rotating member so as to rotate integrally with the rotating member;
An insertion hole into which the rotating member is inserted is formed, and a first position where the distance from the first cam member is close, and a second position where the distance from the first cam member is separated from the first position. A second cam member that is arranged so as to be axially movable between the first cam member and generates an axial cam force by relative rotation with the first cam member;
An electromagnetic coil for generating a magnetic force for moving the second cam member in the axial direction,
The rotating member is an electromagnetic clutch formed in a shape in which a radially movable distance of the second cam member with respect to a rotating shaft thereof is smaller at the first position than at the second position.
前記回転部材は、前記第2カム部材が前記第1位置にあるときに前記挿通孔の内面の少なくとも一部に対向する大径部と、前記第2カム部材の前記第1位置から前記第2位置への移動方向に向かって前記大径部から徐々に径が小さくなるテーパ部と、が形成された請求項1に記載の電磁クラッチ。   The rotating member includes a large-diameter portion facing at least a part of the inner surface of the insertion hole when the second cam member is in the first position, and the second position from the first position of the second cam member. The electromagnetic clutch according to claim 1, wherein a tapered portion having a diameter that gradually decreases from the large-diameter portion toward a moving direction to a position. 前記第2カム部材は、前記第1位置にあるときに、前記挿通孔の内面のうち前記第1カム部材側の一部のみが前記大径部に嵌合される請求項2に記載の電磁クラッチ。   3. The electromagnetic wave according to claim 2, wherein when the second cam member is in the first position, only a part of the inner surface of the insertion hole on the first cam member side is fitted into the large diameter portion. clutch.
JP2009281398A 2009-12-11 2009-12-11 Electromagnetic clutch Pending JP2011122680A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013011285A (en) * 2011-06-28 2013-01-17 Toyota Motor Corp Electromagnetic engagement apparatus
CN112352114A (en) * 2018-07-02 2021-02-09 吉凯恩汽车有限公司 Friction clutch device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013011285A (en) * 2011-06-28 2013-01-17 Toyota Motor Corp Electromagnetic engagement apparatus
US9145930B2 (en) 2011-06-28 2015-09-29 Toyota Jidosha Kabushiki Kaisha Electromagnetic engagement apparatus
CN112352114A (en) * 2018-07-02 2021-02-09 吉凯恩汽车有限公司 Friction clutch device
CN112352114B (en) * 2018-07-02 2022-02-15 吉凯恩汽车有限公司 Friction clutch device

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