JP4364170B2 - Power transmission device - Google Patents

Power transmission device Download PDF

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Publication number
JP4364170B2
JP4364170B2 JP2005205233A JP2005205233A JP4364170B2 JP 4364170 B2 JP4364170 B2 JP 4364170B2 JP 2005205233 A JP2005205233 A JP 2005205233A JP 2005205233 A JP2005205233 A JP 2005205233A JP 4364170 B2 JP4364170 B2 JP 4364170B2
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clutch
side clutch
clutch plate
power transmission
pressure
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JP2007024134A (en
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片岡　　真
成城 川島
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FCC KK
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FCC KK
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Priority to PCT/JP2006/312703 priority patent/WO2007007538A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
    • F16D13/54—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
    • F16D13/56—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member in which the clutching pressure is produced by springs only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
    • F16D13/54—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
    • F16D13/56—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member in which the clutching pressure is produced by springs only
    • F16D2013/565—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member in which the clutching pressure is produced by springs only with means for releasing the clutch pressure in case of back torque

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

Description

本発明は、任意に入力部材の回転力を出力部材に伝達させ又は遮断させ得る動力伝達装置に関するものである。   The present invention relates to a power transmission device that can arbitrarily transmit or block the rotational force of an input member to an output member.

一般に自動二輪車が具備する動力伝達装置は、エンジン及びミッションの駆動力の駆動輪への伝達又は遮断を任意に行わせるためのもので、エンジン及びミッション側と連結された入力部材と、駆動輪側と連結された出力部材と、出力部材と連結されたクラッチ部材とを有しており、複数形成された駆動側クラッチ板と被動側クラッチ板とを圧接させることにより動力の伝達を行い、離間（圧接力の解放）させることにより当該動力の伝達を遮断するよう構成されている。   In general, a power transmission device included in a motorcycle is for arbitrarily transmitting or blocking driving force of an engine and a transmission to a driving wheel. An input member connected to the engine and the transmission side, and a driving wheel side And an output member connected to the output member, and a clutch member connected to the output member. The transmission of the power is cut off by releasing the pressure contact force.

然るに、出力部材の回転が入力部材の回転数を上回って所謂バックトルクが生じた際に両クラッチ板を離間させるバックトルクリミッタ機能を付加すべく、従来より、出力部材としてのシャフト近傍にカム部材を配設しておく技術が開示されている（例えば、特許文献１参照）。かかる従来の動力伝達装置によれば、シャフトとクラッチ部材との間にカム部材を配設しておき、バックトルクが生じた際には当該カム部材の作用により、駆動側クラッチ板と被動側クラッチ板とが離間する方向（圧接力が解放される方向）にプレッシャ部材を移動させてバックトルクを吸収し得るようになっている。
特開平２−１５０５１７号公報 However, in order to add a back torque limiter function that separates both clutch plates when a so-called back torque is generated when the rotation of the output member exceeds the rotation speed of the input member, a cam member is conventionally provided near the shaft as the output member. Has been disclosed (see, for example, Patent Document 1). According to such a conventional power transmission device, the cam member is disposed between the shaft and the clutch member, and when the back torque is generated, the drive side clutch plate and the driven side clutch are caused by the action of the cam member. The back torque can be absorbed by moving the pressure member in a direction away from the plate (a direction in which the pressing force is released).
Japanese Patent Laid-Open No. 2-150517

しかしながら、上記従来の動力伝達装置においては、バックトルクリミッタのためのカム部材が出力部材としてのシャフト近傍に配設されているため、当該カム部材のカム面に付加される面圧が過大となってしまう虞があった。従って、かかる過大な面圧にも耐え得るよう、カム部材を鍛造品等高剛性のもので構成する必要があったが、そのような部品を使用した場合、装置全体が高価なものとなってしまうという問題があった。また、カム部材を新たに付加することにより、装置の部品点数が増加してしまうとともに装置構成が複雑化して組立て時の作業性が悪化してしまい、製造コストが悪化してしまうという問題もあった。   However, in the conventional power transmission device, since the cam member for the back torque limiter is disposed in the vicinity of the shaft as the output member, the surface pressure applied to the cam surface of the cam member becomes excessive. There was a risk of it. Therefore, it is necessary to configure the cam member with a highly rigid material such as a forged product so that it can withstand such an excessive surface pressure. However, when such a component is used, the entire apparatus becomes expensive. There was a problem that. In addition, the addition of a cam member increases the number of parts of the apparatus, complicates the apparatus configuration, deteriorates the workability during assembly, and deteriorates the manufacturing cost. It was.

しかして、従来の動力伝達装置におけるクラッチ部材には、被動側クラッチ板と嵌合するスプラインが当該外周側面の軸方向に形成されているものであるため、本出願人は、従来より形成されているクラッチ部材のスプラインを利用して、バックトルクリミッタ機能を持たせることを検討した。   Thus, the clutch member in the conventional power transmission device has a spline that is fitted to the driven side clutch plate in the axial direction of the outer peripheral side surface. We studied to provide a back torque limiter function using the splines of the clutch members.

本発明は、このような事情に鑑みてなされたもので、装置の製造コストを低減し得るとともに、部品点数の増加抑制及び装置構成の簡素化、伝達トルクの大きさからみた場合の小型化を図ることができる動力伝達装置を提供することにある。   The present invention has been made in view of such circumstances, and can reduce the manufacturing cost of the apparatus, suppress the increase in the number of parts, simplify the apparatus configuration, and reduce the size in view of the magnitude of the transmission torque. An object of the present invention is to provide a power transmission device that can be realized.

請求項１記載の発明は、入力部材の回転と共に回転し複数の駆動側クラッチ板が形成されたクラッチハウジングと、凹凸形状から成るスプラインが外周側面の軸方向に形成されるとともに、前記クラッチハウジングの駆動側クラッチ板と交互に形成されつつ当該スプラインに嵌合した被動側クラッチ板を複数有し、出力部材と連結されたクラッチ部材と、前記クラッチ部材の軸方向に移動が可能とされつつ当該クラッチ部材に取り付けられ、クラッチ部材に対する軸方向への移動に伴い前記駆動側クラッチ板と被動側クラッチ板とを圧接又は離間させ得るプレッシャ部材とを有し、前記駆動側クラッチ板と被動側クラッチ板との圧接又は離間により、入力部材に入力された回転力を出力部材に伝達し又は遮断し得る動力伝達装置において、前記クラッチ部材に形成されたスプラインを成す凸部の前記プレッシャ部材取り付け側端部に第１勾配面を形成するとともに、当該プレッシャ部材に前記第１勾配面と対応した第２勾配面を形成し、これら第１勾配面及び第２勾配面が、前記出力部材の回転が入力部材の回転数を上回ったときに前記駆動側クラッチ板と被動側クラッチ板との離間を行わせるバックトルクリミッタ用カムを構成することを特徴とする。   According to the first aspect of the present invention, there is provided a clutch housing that is rotated with the rotation of the input member to form a plurality of drive side clutch plates, and a spline having a concavo-convex shape is formed in the axial direction of the outer peripheral side surface. A plurality of driven side clutch plates that are alternately formed with the drive side clutch plates and fitted to the spline, the clutch member connected to the output member, and the clutch member being movable in the axial direction of the clutch member A pressure member attached to the member and capable of press-contacting or separating the driving-side clutch plate and the driven-side clutch plate in association with movement in the axial direction relative to the clutch member, and the driving-side clutch plate and the driven-side clutch plate, In the power transmission device that can transmit or shut off the rotational force input to the input member to the output member by the pressure contact or separation of A first gradient surface is formed on the pressure member mounting side end of the convex portion forming the spline formed on the clutch member, and a second gradient surface corresponding to the first gradient surface is formed on the pressure member, The first gradient surface and the second gradient surface constitute a back torque limiter cam that separates the drive side clutch plate and the driven side clutch plate when the rotation of the output member exceeds the rotation speed of the input member. It is characterized by doing.

請求項１の発明によれば、クラッチ部材に形成されたスプラインを成す凸部のプレッシャ部材取り付け側端部に第１勾配面を形成するとともに、当該プレッシャ部材に第１勾配面と対応した第２勾配面を形成し、これら第１勾配面及び第２勾配面がバックトルクリミッタ用カムを構成するので、装置の製造コストを低減し得るとともに、部品点数の増加抑制及び装置構成の簡素化、伝達トルクの大きさからみた場合の小型化を図ることができる。   According to the first aspect of the present invention, the first gradient surface is formed at the pressure member mounting side end portion of the convex portion forming the spline formed in the clutch member, and the second corresponding to the first gradient surface is formed on the pressure member. Since the slope surface is formed and the first slope surface and the second slope surface constitute the back torque limiter cam, the manufacturing cost of the device can be reduced, the increase in the number of parts is suppressed, and the device configuration is simplified and transmitted. The size can be reduced when viewed from the magnitude of torque.

また、クラッチ部材の外周側面に形成されたスプラインには、略全周に亘って複数の凸部が均等に形成されているため、これら全ての凸部のプレッシャ部材取り付け側端部に第１勾配面を形成することにより、多数のバックトルクリミッタ用カムをクラッチ部材の周方向に略均等に形成させることができ、バックトルク発生時に付与される面圧を効率よく分散させることができる。   In addition, the spline formed on the outer peripheral side surface of the clutch member has a plurality of convex portions that are formed evenly over substantially the entire circumference. Therefore, the first gradient is formed at the pressure member mounting side end portion of all the convex portions. By forming the surface, a large number of back torque limiter cams can be formed substantially evenly in the circumferential direction of the clutch member, and the surface pressure applied when the back torque is generated can be efficiently dispersed.

以下、本発明の実施形態について図面を参照しながら具体的に説明する。
第１の実施形態に係る動力伝達装置は、二輪車等の車両に配設されて任意にエンジンやミッションの駆動力を駆動輪側へ伝達し又は遮断するためのもので、図１に示すように、入力部材としてのギア１が形成されたクラッチハウジング２と、出力部材としてのシャフト３と連結されたクラッチ部材４と、該クラッチ部材４の同図中右端側に取り付けられたプレッシャ部材５と、クラッチハウジング２側に連結された駆動側クラッチ板６及びクラッチ部材４側に連結された被動側クラッチ板７とから主に構成されている。 Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The power transmission device according to the first embodiment is disposed in a vehicle such as a two-wheeled vehicle and arbitrarily transmits or shuts off the driving force of the engine or the mission to the driving wheel side, as shown in FIG. A clutch housing 2 in which a gear 1 as an input member is formed, a clutch member 4 connected to a shaft 3 as an output member, and a pressure member 5 attached to the right end side of the clutch member 4 in FIG. It is mainly composed of a driving side clutch plate 6 connected to the clutch housing 2 side and a driven side clutch plate 7 connected to the clutch member 4 side.

ギア１は、エンジンから伝達された駆動力（回転力）が入力されるとシャフト３を中心として回転可能とされたもので、リベット８等によりクラッチハウジング２と連結されている。該クラッチハウジング２は、同図右端側が開口した円筒状のケース部材から成り、その内周壁からは複数の駆動側クラッチ板６が形成されている。かかる駆動側クラッチ板６のそれぞれは、略円環状に形成された板材から成るとともにクラッチハウジング２の回転と共に回転し得るよう構成されている。   The gear 1 is rotatable about the shaft 3 when a driving force (rotational force) transmitted from the engine is input, and is connected to the clutch housing 2 by a rivet 8 or the like. The clutch housing 2 is formed of a cylindrical case member opened on the right end side of the figure, and a plurality of drive side clutch plates 6 are formed from the inner peripheral wall thereof. Each of the drive side clutch plates 6 is made of a plate material formed in a substantially annular shape, and is configured to be able to rotate with the rotation of the clutch housing 2.

クラッチ部材４は、クラッチハウジング２内に配設された同図中右端側が開口した円筒状のケース部材から成るものである。かかるクラッチ部材４の略中央にはシャフト３が貫通しつつスプライン嵌合により連結されており、クラッチ部材４が回転するとシャフト３も回転するよう構成されている。また、クラッチ部材４の外周側面には、その軸方向（同図中左右方向）に延びるスプライン１０が形成されており、該スプライン１０に被動側クラッチ板７が嵌め込まれて形成されている。   The clutch member 4 is formed of a cylindrical case member disposed in the clutch housing 2 and opened on the right end side in the figure. The shaft 3 is connected to the substantially center of the clutch member 4 by spline fitting while passing therethrough, and the shaft 3 is also rotated when the clutch member 4 rotates. A spline 10 extending in the axial direction (left-right direction in the figure) is formed on the outer peripheral side surface of the clutch member 4, and the driven clutch plate 7 is fitted into the spline 10.

より具体的には、クラッチ部材４に形成されたスプライン１０は、図２に示すように、その外周側面における略全周に亘って一体的に形成された凹凸形状（凹溝１０ａ及び凸部１０ｂ）から構成されており、凹溝１０ａに被動側クラッチ板７が嵌合することにより、被動側クラッチ板７のクラッチ部材４に対する軸方向の移動を許容しつつ回転方向の移動が規制され、当該クラッチ部材４と共に回転し得るよう構成されているのである。   More specifically, as shown in FIG. 2, the spline 10 formed on the clutch member 4 has an uneven shape (concave groove 10a and convex portion 10b formed integrally over substantially the entire circumference on the outer peripheral side surface thereof. ), And the driven clutch plate 7 is fitted into the concave groove 10a, so that the movement of the driven clutch plate 7 in the rotational direction is restricted while allowing the driven clutch plate 7 to move in the axial direction. It is configured to be able to rotate together with the clutch member 4.

かかる被動側クラッチ板７は、駆動側クラッチ板６と交互に積層形成されており、隣接する各クラッチ板６、７が圧接又は離間可能なようになっている。即ち、両クラッチ板６、７は、クラッチ部材４の軸方向への摺動が許容されており、プレッシャ部材５にて同図中左方向へ押圧されると圧接され、クラッチハウジング２の回転力がクラッチ部材４及びシャフト３に伝達される状態となり、プレッシャ部材５による押圧を解除すると離間してクラッチ部材４がクラッチハウジング２の回転に追従しなくなって停止し、シャフト３への回転力の伝達がなされなくなるのである。   The driven clutch plates 7 are alternately laminated with the driving clutch plates 6 so that the adjacent clutch plates 6 and 7 can be pressed against or separated from each other. That is, both the clutch plates 6 and 7 are allowed to slide in the axial direction of the clutch member 4 and are pressed against each other when pressed by the pressure member 5 in the left direction in FIG. Is transmitted to the clutch member 4 and the shaft 3, and when the pressure member 5 releases the pressure, the clutch member 4 stops and stops following the rotation of the clutch housing 2, and transmits the rotational force to the shaft 3. Will not be done.

尚、ここでいう両クラッチ板６、７の離間とは、当該両クラッチ板６、７間にクリアランスを生じた状態である必要はなく、物理的なクリアランスが生じていなくても、圧接力が解除されてクラッチ部材４がクラッチハウジング２の回転に追従しなくなった状態（即ち、駆動側クラッチ板６が被動側クラッチ板７上を摺動する状態）をも含むものとする。   The separation of both clutch plates 6 and 7 here does not need to be a state in which a clearance is generated between both clutch plates 6 and 7, and the pressure contact force is not required even if a physical clearance is not generated. It also includes a state in which the clutch member 4 is released and does not follow the rotation of the clutch housing 2 (that is, a state in which the drive side clutch plate 6 slides on the driven side clutch plate 7).

プレッシャ部材５は、クラッチ部材４の開口（同図中右端）を塞ぐ如く略円板状に形成されたもので、クラッチスプリングＳにより同図中左方向へ常時付勢されている。即ち、クラッチ部材４にはプレッシャ部材５側へ延びて貫通したボス部４ｂが形成されており、該ボス部４ｂにクラッチボルトＢを挿通させるとともに、かかるクラッチボルトＢの頭部側とプレッシャ部材５との間にクラッチスプリングＳを介装することにより、当該プレッシャ部材５が常時左方向へ付勢されているのである。   The pressure member 5 is formed in a substantially disc shape so as to close the opening (right end in the figure) of the clutch member 4, and is always urged leftward in the figure by the clutch spring S. That is, the clutch member 4 is formed with a boss portion 4b extending and penetrating to the pressure member 5 side. The clutch bolt B is inserted into the boss portion 4b and the head side of the clutch bolt B and the pressure member 5 are inserted. Since the clutch spring S is interposed between the pressure member 5 and the pressure member 5, the pressure member 5 is always urged leftward.

一方、プレッシャ部材５の縁部５ａは、駆動側クラッチ板６及び被動側クラッチ７が積層された同図中最右部と当接しており、クラッチスプリングＳの付勢力により両クラッチ板６と７とが圧接するようになっている。従って、クラッチハウジング２とクラッチ部材４とは常時連結された状態となっており、ギア１に回転力が入力されるとシャフト３を回転させ得るようになっている。   On the other hand, the edge portion 5a of the pressure member 5 is in contact with the rightmost portion in the drawing in which the driving side clutch plate 6 and the driven side clutch 7 are laminated, and both clutch plates 6 and 7 are urged by the urging force of the clutch spring S. Are in pressure contact. Accordingly, the clutch housing 2 and the clutch member 4 are always connected, and the shaft 3 can be rotated when a rotational force is input to the gear 1.

然るに、シャフト３の内部には、その軸方向に延びるプッシュロッド９が配設されており、運転者が図示しない操作手段を操作することにより当該プッシュロッド９を同図中右方向へ突出させ、プレッシャ部材５をクラッチスプリングＳの付勢力に抗して右方向へ移動させることができるようになっている。プレッシャ部材５が右方向へ移動すると、駆動側クラッチ板６と被動側クラッチ板７との圧接力が解かれ、離間状態となってギア１及びクラッチハウジング２へ入力された回転力がクラッチ部材４及びシャフト３へ伝達されず遮断されることとなる。即ち、プレッシャ部材５は、クラッチ部材４に対する軸方向への移動に伴い駆動側クラッチ板６と被動側クラッチ板７とを圧接又は離間させることができるよう構成されているのである。   However, a push rod 9 extending in the axial direction is disposed inside the shaft 3, and when the driver operates an operating means (not shown), the push rod 9 protrudes to the right in the figure, The pressure member 5 can be moved rightward against the urging force of the clutch spring S. When the pressure member 5 moves in the right direction, the pressure contact force between the driving side clutch plate 6 and the driven side clutch plate 7 is released, and the rotational force input to the gear 1 and the clutch housing 2 in the separated state is applied to the clutch member 4. And it is interrupted without being transmitted to the shaft 3. That is, the pressure member 5 is configured so that the driving side clutch plate 6 and the driven side clutch plate 7 can be pressed against or separated from each other as the clutch member 4 moves in the axial direction.

ここで、本実施形態に係るクラッチ部材４のスプライン１０には、その凸部１０ｂのプレッシャ部材５取り付け側端部（クラッチ部材４の開口側端部）に第１勾配面１０ｂａが形成されるとともに、プレッシャ部材５には、当該第１勾配面１０ｂａと対応する第２勾配面５ｂが形成されており、これら第１勾配面１０ｂａ及び第２勾配面５ｂがバックトルクリミッタ用カムを構成している。   Here, in the spline 10 of the clutch member 4 according to the present embodiment, the first slope surface 10ba is formed at the pressure member 5 attachment side end portion (opening side end portion of the clutch member 4) of the convex portion 10b. The pressure member 5 is formed with a second gradient surface 5b corresponding to the first gradient surface 10ba, and the first gradient surface 10ba and the second gradient surface 5b constitute a back torque limiter cam. .

即ち、シャフト３の回転がギア１及びクラッチハウジング２の回転数を上回って、図３で示した符号ｂ方向のバックトルク（クラッチ部材４の正転方向ａとは反対方向のトルク）が生じた際には、図４に示すように、第１勾配面１０ｂａと第２勾配面５ｂとが合致してバックトルクリミッタ用カムが作用し、プレッシャ部材５を同図中ｃ方向へ移動、又はｃ方向への力を発生させて駆動側クラッチ板６と被動側クラッチ板７との離間、又はクラッチスプリングＳによるスプリング荷重がｃ方向への荷重分下がることによるクラッチ容量低下を行わせるようになっている。これにより、バックトルクによる動力伝達装置や動力源（エンジン側）に対する不具合を回避することができる。   That is, the rotation of the shaft 3 exceeds the rotation speed of the gear 1 and the clutch housing 2, and the back torque in the direction b shown in FIG. 3 (torque in the direction opposite to the forward rotation direction a of the clutch member 4) is generated. In this case, as shown in FIG. 4, the first gradient surface 10ba and the second gradient surface 5b are matched and the back torque limiter cam is actuated to move the pressure member 5 in the direction c in FIG. Force in the direction is generated to separate the drive side clutch plate 6 and the driven side clutch plate 7, or to reduce the clutch capacity by reducing the spring load by the clutch spring S in the c direction. Yes. Thereby, the malfunction with respect to the power transmission device and power source (engine side) by back torque can be avoided.

このように、クラッチ部材４の外周側面に位置するスプライン１０の凸部１０ｂにバックトルクリミッタ用カムが形成されているので、従来の如くシャフト３の近傍に上記機能のカム部材が配設されたものに比べ、カム面に付加される面圧を小さくすることができ、過度な荷重が付与されることを回避することができる。従って、鍛造品等の別途の部品を不要とし、製造コストを低減させることができるとともに、部品点数を削減することができる。尚、伝達トルクの大きさからみた場合の小型化（即ち、同一伝達トルクのものを比べた場合の小型化）を図ることができる。   As described above, since the cam for back torque limiter is formed on the convex portion 10b of the spline 10 located on the outer peripheral side surface of the clutch member 4, the cam member having the above function is disposed in the vicinity of the shaft 3 as in the prior art. The surface pressure applied to the cam surface can be reduced as compared with the above, and an excessive load can be avoided. Therefore, a separate part such as a forged product is not required, the manufacturing cost can be reduced, and the number of parts can be reduced. Note that it is possible to reduce the size when viewed from the magnitude of the transmission torque (that is, downsizing when comparing the same transmission torque).

また、従来より形成されていたスプライン１０の凸部１０ｂにおけるプレッシャ部材５取り付け側端部に勾配面（第１勾配面１０ｂａ）を形成し、これと対応する勾配面（第２勾配面５ｂ）をプレッシャ部材５に形成させるのみで、バックトルクリミッタ機能を果たすことができるので、既存の動力伝達装置に対してバックトルクリミッタ用カムを新たに付与させようとした場合、剛性を向上させるための別途の工程を付加するのが不要である。従って、既存の動力伝達装置に対する本発明の適用が容易であるという効果を奏することができる。   Further, a slope surface (first slope surface 10ba) is formed on the pressure member 5 attachment side end portion of the convex portion 10b of the spline 10 that has been conventionally formed, and a corresponding slope surface (second slope surface 5b) is formed. Since the back torque limiter function can be achieved only by forming it on the pressure member 5, if a new cam for the back torque limiter is to be added to the existing power transmission device, it is separately added to improve the rigidity. It is not necessary to add this process. Therefore, the effect that the present invention can be easily applied to the existing power transmission device can be achieved.

更に、クラッチ部材４の外周側面に形成されたスプライン１０には、略全周に亘って複数の凸部１０ｂが均等に形成されているため、これら全ての凸部１０ｂのプレッシャ部材５取り付け側端部に第１勾配面１０ｂａを形成することにより、多数のバックトルクリミッタ用カムをクラッチ部材４の周方向に略均等に形成させることができ、バックトルク発生時に付与される面圧を効率よく分散させることができる。   Further, the spline 10 formed on the outer circumferential side surface of the clutch member 4 is formed with a plurality of convex portions 10b uniformly over substantially the entire circumference, and therefore the pressure member 5 attachment side end of all the convex portions 10b. By forming the first slope surface 10ba in the portion, a large number of back torque limiter cams can be formed substantially evenly in the circumferential direction of the clutch member 4, and the surface pressure applied when the back torque is generated is efficiently dispersed. Can be made.

以上、本実施形態について説明したが、本発明はこれに限定されるものではなく、例えば従来の如く通常のスプライン１０をクラッチ部材４の外周側面に形成するとともに、スプライン１０における凸部１０ｂのプレッシャ部材５取り付け側端部に対して別途の加工（切削加工等）を施し、第１勾配面１０ｂａを形成するようにしてもよい。勿論、製造工程削減の観点から、クラッチ部材４の成形型に第１勾配面１０ｂａを成形するためのプロフィルを形成しておき、当該クラッチ部材４の造り込み時に第１勾配面１０ｂａを一体成形するようにするのが好ましい。更に、本発明の動力伝達装置は、二輪車の他、自動車、３輪又は４輪バギー、或いは汎用機等種々の多板クラッチ型の動力伝達装置に適用することができる。   Although the present embodiment has been described above, the present invention is not limited to this. For example, the conventional spline 10 is formed on the outer peripheral side surface of the clutch member 4 as in the prior art, and the pressure of the convex portion 10b in the spline 10 is determined. A separate process (cutting process or the like) may be applied to the end portion on the member 5 attachment side to form the first gradient surface 10ba. Of course, from the viewpoint of reducing the manufacturing process, a profile for forming the first gradient surface 10ba is formed on the mold of the clutch member 4, and the first gradient surface 10ba is integrally formed when the clutch member 4 is built. It is preferable to do so. Furthermore, the power transmission device according to the present invention can be applied to various multi-plate clutch type power transmission devices such as two-wheeled vehicles, automobiles, three-wheel or four-wheel buggies, and general-purpose machines.

クラッチ部材に形成されたスプラインを成す凸部のプレッシャ部材取り付け側端部に第１勾配面を形成するとともに、当該プレッシャ部材に第１勾配面と対応した第２勾配面を形成し、これら第１勾配面及び第２勾配面が、出力部材の回転が入力部材の回転数を上回ったときに駆動側クラッチ板と被動側クラッチ板との離間を行わせるバックトルクリミッタ用カムを構成する動力伝達装置であれば、他の機能を付加したもの、或いは外観形状等が異なるものにも適用することができる。   A first gradient surface is formed on the pressure member mounting side end of the convex portion forming the spline formed on the clutch member, and a second gradient surface corresponding to the first gradient surface is formed on the pressure member, and the first gradient surface is formed. A power transmission device constituting a back torque limiter cam in which the gradient surface and the second gradient surface cause the drive side clutch plate and the driven side clutch plate to be separated when the rotation of the output member exceeds the rotation speed of the input member If so, the present invention can be applied to a device to which another function is added or a device having a different external shape.

本発明の実施形態に係る動力伝達装置を示す縦断面図The longitudinal cross-sectional view which shows the power transmission device which concerns on embodiment of this invention 同動力伝達装置におけるクラッチ部材を示す斜視図The perspective view which shows the clutch member in the same power transmission device 同動力伝達装置におけるクラッチ部材の正転時におけるプレッシャ部材との関係を示す模式図The schematic diagram which shows the relationship with the pressure member at the time of forward rotation of the clutch member in the same power transmission device 同動力伝達装置におけるクラッチ部材の逆転時（バックトルクが付与された状態）におけるプレッシャ部材との関係を示す模式図The schematic diagram which shows the relationship with a pressure member at the time of reverse rotation of the clutch member in the same power transmission device (a state where back torque is applied)

符号の説明Explanation of symbols

１ ギア（入力部材）
２ クラッチハウジング
３ シャフト（出力部材）
４ クラッチ部材
４ａ 凹部
５ プレッシャ
５ｂ 第２勾配面（バックトルクリミッタ用カム）
６ 駆動側クラッチ板
７ 被動側クラッチ板
８ リベット
９ プッシュロッド
１０ スプライン
１０ａ （スプラインを構成する）凹溝
１０ｂ （スプラインを構成する）凸部
１０ｂａ 第１勾配面（バックトルクリミッタ用カム）
Ｓ クラッチスプリング
Ｂ クラッチボルト 1 Gear (input member)
2 Clutch housing 3 Shaft (output member)
4 Clutch member 4a Concave portion 5 Pressure 5b Second slope surface (cam for back torque limiter)
6 Driving side clutch plate 7 Driven side clutch plate 8 Rivet 9 Push rod 10 Spline 10a Groove 10b (Composing spline) Convex portion 10ba First slope surface (cam for back torque limiter)
S Clutch spring B Clutch bolt

Claims (1)

入力部材の回転と共に回転し複数の駆動側クラッチ板が形成されたクラッチハウジングと、
凹凸形状から成るスプラインが外周側面の軸方向に形成されるとともに、前記クラッチハウジングの駆動側クラッチ板と交互に形成されつつ当該スプラインに嵌合した被動側クラッチ板を複数有し、出力部材と連結されたクラッチ部材と、
前記クラッチ部材の軸方向に移動が可能とされつつ当該クラッチ部材に取り付けられ、クラッチ部材に対する軸方向への移動に伴い前記駆動側クラッチ板と被動側クラッチ板とを圧接又は離間させ得るプレッシャ部材と、
を有し、前記駆動側クラッチ板と被動側クラッチ板との圧接又は離間により、入力部材に入力された回転力を出力部材に伝達し又は遮断し得る動力伝達装置において、
前記クラッチ部材に形成されたスプラインを成す凸部の前記プレッシャ部材取り付け側端部に第１勾配面を形成するとともに、当該プレッシャ部材に前記第１勾配面と対応した第２勾配面を形成し、これら第１勾配面及び第２勾配面が、前記出力部材の回転が入力部材の回転数を上回ったときに前記駆動側クラッチ板と被動側クラッチ板との離間を行わせるバックトルクリミッタ用カムを構成することを特徴とする動力伝達装置。 A clutch housing that rotates with the rotation of the input member to form a plurality of drive side clutch plates;
A spline having a concavo-convex shape is formed in the axial direction of the outer peripheral side surface, and has a plurality of driven side clutch plates that are alternately formed with the drive side clutch plates of the clutch housing and are fitted to the splines, and is connected to the output member A clutch member,
A pressure member that is attached to the clutch member while being capable of moving in the axial direction of the clutch member, and capable of press-contacting or separating the driving-side clutch plate and the driven-side clutch plate along with the axial movement of the clutch member; ,
In the power transmission device capable of transmitting or shutting off the rotational force input to the input member by the press contact or separation between the driving side clutch plate and the driven side clutch plate,
Forming a first gradient surface at the pressure member mounting side end of the convex portion forming the spline formed in the clutch member, and forming a second gradient surface corresponding to the first gradient surface on the pressure member; The first gradient surface and the second gradient surface provide a back torque limiter cam for separating the drive side clutch plate and the driven side clutch plate when the rotation of the output member exceeds the rotation speed of the input member. A power transmission device characterized by comprising.
JP2005205233A 2005-07-14 2005-07-14 Power transmission device Expired - Fee Related JP4364170B2 (en)

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JP4669359B2 (en) * 2005-09-14 2011-04-13 株式会社エフ・シー・シー Power transmission device
JP2009127702A (en) * 2007-11-21 2009-06-11 Yamaha Motor Co Ltd Multi-disk centrifugal clutch and vehicle having the same
CN104074877B (en) * 2013-03-26 2018-08-14 舍弗勒技术股份两合公司 Steel piece avoids the dry type lamella clutch engaged with gap
JP6478865B2 (en) * 2015-08-04 2019-03-06 ジヤトコ株式会社 Reverse load prevention mechanism for vehicle transmission
CN105422676A (en) * 2015-12-04 2016-03-23 重庆长兴工业有限公司 Novel driven gear positioning structure of motorcycle clutch
JP7217588B2 (en) * 2018-01-11 2023-02-03 株式会社エフ・シー・シー power transmission device

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US2799375A (en) * 1952-10-02 1957-07-16 Daimler Benz Ag Fluid-actuated friction clutches
JPS56113232U (en) * 1980-01-31 1981-09-01
JPS6196222A (en) * 1984-10-17 1986-05-14 Kawasaki Heavy Ind Ltd Multiple disc friction clutch
JPH02176219A (en) * 1988-12-28 1990-07-09 Honda Motor Co Ltd Wet type multi-disc friction clutch
JPH0754859A (en) * 1993-08-20 1995-02-28 Daikin Mfg Co Ltd Clutch device for motor cycle
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