WO2025205397A1 - クラッチ装置 - Google Patents

クラッチ装置

Info

Publication number
WO2025205397A1
WO2025205397A1 PCT/JP2025/010938 JP2025010938W WO2025205397A1 WO 2025205397 A1 WO2025205397 A1 WO 2025205397A1 JP 2025010938 W JP2025010938 W JP 2025010938W WO 2025205397 A1 WO2025205397 A1 WO 2025205397A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
center
plate
side rotating
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/010938
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
克 吉本
迅 吹野
朋弥 佐藤
亮太 志水
嘉彦 小澤
佑城 青野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FCC Co Ltd
Original Assignee
FCC Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/JP2024/043291 external-priority patent/WO2025203895A1/ja
Application filed by FCC Co Ltd filed Critical FCC Co Ltd
Priority to JP2026511132A priority Critical patent/JPWO2025205397A1/ja
Publication of WO2025205397A1 publication Critical patent/WO2025205397A1/ja
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F16D13/58—Details
    • F16D13/60—Clutching elements
    • F16D13/64—Clutch-plates; Clutch-lamellae

Definitions

  • the present invention relates to a clutch device.
  • Patent Document 1 discloses a power transmission device (hereinafter referred to as a clutch device) that has an input member (hereinafter referred to as an input shaft) connected to the engine, an output member (hereinafter referred to as an output shaft) connected to the drive wheel, a clutch member (hereinafter referred to as a clutch center) connected to the output shaft, and a pressure member (hereinafter referred to as a pressure plate) that can move toward or away from the clutch center.
  • a clutch device that has an input member (hereinafter referred to as an input shaft) connected to the engine, an output member (hereinafter referred to as an output shaft) connected to the drive wheel, a clutch member (hereinafter referred to as a clutch center) connected to the output shaft, and a pressure member (hereinafter referred to as a pressure plate) that can move toward or away from the clutch center.
  • the clutch center and pressure plate in Patent Document 1 each have an assist cam surface that generates a force (hereinafter referred to as cam thrust) in a direction from the pressure plate toward the clutch center when the engine's rotational driving force can be transmitted to the output shaft, thereby increasing the contact force (pressing force) between the input side rotating plate and the output side rotating plate.
  • cam thrust a force
  • the clutch device of the present invention is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft, and includes a clutch center that holds a portion of a plurality of output side rotating plates that are arranged alternately with the input side rotating plates and that rotates together with the output shaft, a pressure plate that is arranged so as to be able to approach or move away from the clutch center, holds another portion of the plurality of output side rotating plates, and is capable of pressing the input side rotating plates and the output side rotating plates together, and a suppression member, and when the clutch center rotates relative to the pressure plate, a center side pressure plate that generates a cam thrust in a direction from the pressure plate toward the clutch center in order to increase the pressing force between the input side rotating plates and the output side rotating plates.
  • the clutch includes a center-side cam portion having an assist cam surface, the pressure plate being capable of contacting the center-side assist cam surface and including a pressure-side cam portion having a pressure-side assist cam surface that generates the cam thrust when rotating relative to the clutch center, and the suppression member is configured to allow the input-side rotating plate and the output-side rotating plate held by the clutch center to approach each other and suppress the input-side rotating plate and at least a portion of the output-side rotating plate held by the pressure plate from approaching each other in a first operating range in which the clutch is in a partial clutch state and the engine speed is equal to or lower than a first engine speed, and to allow the input-side rotating plate and all of the output-side rotating plates to approach each other in a second operating range in which the engine speed is higher than the first engine speed.
  • the suppression member allows the input rotating plate and the output rotating plate held by the clutch center to approach each other, while suppressing the input rotating plate and at least a portion of the output rotating plate held by the pressure plate from approaching each other.
  • the input rotating plate and at least a portion of the output rotating plate held by the pressure plate are prevented from approaching each other, thereby suppressing the cam thrust from being suddenly applied to the entire input rotating plate and output rotating plate. This makes it possible to suppress a sudden increase in the pressure contact force between the input rotating plate and the output rotating plate.
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft, holds a portion of a plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and is rotationally driven together with the output shaft; a pressure plate that is arranged so as to be able to approach or move away from the clutch center, holds another portion of the plurality of output side rotating plates, and is capable of pressing the input side rotating plates and the output side rotating plates together; and a suppression member; and when the clutch center rotates relative to the pressure plate, a cam thrust force is generated in a direction from the pressure plate toward the clutch center in order to increase the pressing force between the input side rotating plates and the output side rotating plates.
  • the pressure plate is provided with a pressure-side cam portion having a center-side assist cam surface that generates the cam thrust when the pressure plate rotates relative to the clutch center and is arranged to be able to come into contact with the center-side assist cam surface;
  • the pressure plate is provided with a pressure-side cam portion having a pressure-side assist cam surface that generates the cam thrust when the pressure plate rotates relative to the clutch center;
  • the suppression member is configured to allow the input-side rotating plate and the output-side rotating plate held by the clutch center to approach each other and to suppress the input-side rotating plate and at least a portion of the output-side rotating plate held by the pressure plate from approaching each other in a suppression region that is equal to or lower than a first engine speed; and to allow the input-side rotating plate and all of the output-side rotating plates to approach each other in a non-suppression region that is equal to or higher than the first engine speed.
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft, holds a portion of a plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and is rotationally driven together with the output shaft; a pressure plate that is arranged so as to be able to approach or move away from the clutch center, holds another portion of the plurality of output side rotating plates, and is capable of pressing the input side rotating plates and the output side rotating plates together; and a restraining member; wherein the clutch center has a center side cam portion that has a center side assist cam surface that generates a cam thrust in a direction from the pressure plate toward the clutch center when it rotates relative to the pressure plate in order to increase the pressing force between the input side rotating plates and the output side rotating plates; and the pressure plate is arranged to be
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft, holds a plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and is rotationally driven together with the output shaft; a pressure plate that is arranged so as to be able to approach or move away from the clutch center, holds a plurality of the output side rotating plates, and is capable of pressing the input side rotating plates and the output side rotating plates together; and a suppression member; and the clutch center has a center side assist cam surface that generates a cam thrust in a direction from the pressure plate toward the clutch center to increase the pressing force between the input side rotating plates and the output side rotating plates when it rotates relative to the pressure plate.
  • the clutch clutch has a center-side cam portion having a pressure-side assist cam surface
  • the pressure plate is arranged to be able to come into contact with the center-side assist cam surface, and has a pressure-side cam portion having a pressure-side assist cam surface that generates the cam thrust when rotating relative to the clutch center.
  • the suppression member is configured to suppress the first adjacent output side rotating plate and the second adjacent output side rotating plate from approaching each other when the pressure plate approaches the clutch center by a predetermined distance in at least a portion of the partial clutch state so that the distance between adjacent first and second adjacent output side rotating plates among the multiple output side rotating plates held by the pressure plate is larger than the distance between adjacent third and fourth adjacent output side rotating plates among the multiple output side rotating plates held by the clutch center.
  • the suppression member is configured to suppress the first and second adjacent output rotating plates from approaching each other when the pressure plate approaches the clutch center by a predetermined distance in at least a portion of the partial clutch state, so that the distance between the first and second adjacent output rotating plates among the multiple output rotating plates held by the pressure plate is greater than the distance between the third and fourth adjacent output rotating plates among the multiple output rotating plates held by the clutch center.
  • the input rotating plate and at least a portion of the output rotating plates held by the pressure plate are suppressed from approaching each other, thereby suppressing the sudden application of cam thrust to the entire input and output rotating plates. This suppresses a sudden increase in the pressure contact force between the input and output rotating plates.
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft and that rotates together with the output shaft; a pressure plate that is arranged so as to be able to approach or move away from the clutch center, that holds at least some of the plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and that can press the input side rotating plates and the output side rotating plates together; and a suppression member, and when the clutch center rotates relative to the pressure plate,
  • the clutch includes a center-side cam portion having a center-side assist cam surface that generates a cam thrust in a direction from the pressure plate toward the clutch center to increase the pressure contact force between the rotating plate and the output-side rotating plate; the pressure plate is arranged to be able to come into contact with the center-side assist cam surface and includes a pressure-
  • the suppression member is configured to suppress the generation of cam thrust in at least a portion of the partial clutch area, and to allow the generation of cam thrust when the clutch is engaged.
  • the generation of cam thrust is suppressed, which prevents the cam thrust from being suddenly applied to the entire input side rotating plate and output side rotating plate. This prevents a sudden increase in the pressure contact force between the input side rotating plate and the output side rotating plate.
  • the clutch center has a center-side cam portion having a center-side assist cam surface that generates a cam thrust in a direction from the pressure plate toward the clutch center to apply pressure to the pressure plate, the pressure plate is arranged to be able to come into contact with the center-side assist cam surface, and the pressure plate has a pressure-side cam portion having a pressure-side assist cam surface that generates the cam thrust when rotated relative to the clutch center, and the suppression member is configured to suppress the generation of the cam thrust in a first operating range in which the clutch is in a half-engaged state and is equal to or lower than a first engine speed, and to allow the generation of the cam thrust in a second operating range in which the engine speed is higher than the first engine speed.
  • the suppression member is configured to suppress the generation of cam thrust in a first operating range in which the clutch is partially engaged and the engine speed is equal to or lower than a first engine speed, and to allow the generation of cam thrust in a second operating range in which the engine speed is higher than the first engine speed.
  • the generation of cam thrust is suppressed, which prevents the cam thrust from being suddenly applied to the entire input side rotating plate and output side rotating plate. This prevents a sudden increase in the pressure contact force between the input side rotating plate and the output side rotating plate.
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft and that rotates together with the output shaft; a pressure plate that is arranged so that it can approach or move away from the clutch center, holds at least some of the plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and is capable of pressing the input side rotating plates and the output side rotating plates together; and a suppressing member, and when the clutch center rotates relative to the pressure plate,
  • the clutch center has a center-side cam portion with a center-side assist cam surface that generates a cam thrust from the pressure plate toward the clutch center to increase the pressure contact force between the force-side rotating plate and the output-side rotating plate; the pressure plate is arranged to be able to come into contact with the center-side assist cam surface and is equipped with a pressure-
  • the suppression member is configured to suppress the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to the output shaft is 50% or less of the rotational driving force transmitted to the input shaft.
  • the generation of cam thrust is suppressed, and therefore it is possible to prevent cam thrust from being suddenly applied to the entire input side rotating plate and output side rotating plate in the region where the rotational driving force transmitted to the output shaft is low. This makes it possible to suppress a sudden increase in the pressure contact force between the input side rotating plate and the output side rotating plate.
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft and that rotates together with the output shaft, a pressure plate that is arranged so as to be able to approach or move away from the clutch center, that holds at least some of a plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and that can press the input side rotating plates and the output side rotating plates together, a suppressing member, and a power transmission path, and when the clutch center rotates relative to the pressure plate, the pressure plate presses the clutch center against the pressure plate to increase the pressing force between the input side rotating plates and the output side rotating plates.
  • the clutch includes a center-side cam portion having a center-side assist cam surface that generates a cam thrust in a direction toward the latch center, the pressure plate being capable of contacting the center-side assist cam surface and having a pressure-side cam portion having a pressure-side assist cam surface that generates the cam thrust when the pressure plate rotates relative to the clutch center, and a plurality of pressure-side engaging teeth that are arranged circumferentially and hold the output-side rotating plate, the power transmission path including the input-side rotating plate, the output-side rotating plate held by the pressure-side engaging teeth, the pressure-side engaging teeth, and the pressure-side assist cam surface, and the suppression member being provided in the power transmission path and configured to suppress the transmission of power from the input-side rotating plate to the output-side rotating plate.
  • the suppression member is provided in the power transmission path and is configured to suppress the transmission of power from the input side rotating plate to the output side rotating plate.
  • the transmission of power from the input side rotating plate to the output side rotating plate is suppressed, thereby suppressing the cam thrust from being suddenly applied to the entire input side rotating plate and output side rotating plate. This makes it possible to suppress a sudden increase in the pressure contact force between the input side rotating plate and the output side rotating plate.
  • Another clutch device is a clutch device that transmits or cuts off the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft, holds some of a plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and rotates and drives together with the output shaft; and a pressure plate that is arranged so as to be able to approach or move away from the clutch center, holds another portion of the plurality of output side rotating plates, and is able to press the input side rotating plates and the output side rotating plates together.
  • the pressure plate is provided so as to be able to come into contact with the center-side assist cam surface, and includes a pressure-side cam portion having a pressure-side assist cam surface that generates the cam thrust when the pressure plate rotates relative to the clutch center, and a plurality of pressure-side engaging teeth that are aligned in the circumferential direction and hold the output-side rotating plate
  • the first power transmission path includes the input-side rotating plate, the output-side rotating plate held by the pressure-side engaging teeth, the pressure-side engaging teeth, and the pressure-side assist cam surface
  • the second power transmission path includes
  • the suppression member is provided in the first power transmission path and is configured to suppress the transmission of power from the input side rotating plate to the output side rotating plate, so that at a predetermined engine speed in a partially engaged state, the power transmitted from the input side rotating plate per output side rotating plate in the first power transmission path is less than the power transmitted from the input side rotating plate per output side rotating plate in the second power transmission path.
  • the suppression member is provided in the first power transmission path and is configured to suppress the transmission of power from the input side rotating plate to the output side rotating plate so that, at a predetermined engine speed in a partially engaged state, the power transmitted from the input side rotating plate per output side rotating plate in the first power transmission path is less than the power transmitted from the input side rotating plate per output side rotating plate in the second power transmission path.
  • Another clutch device is a clutch device that transmits or interrupts the rotational driving force of an input shaft to an output shaft, and includes: a clutch center that is housed in a clutch housing that holds a plurality of input side rotating plates that are rotationally driven by the rotational drive of the input shaft and that rotates together with the output shaft; a pressure plate that is arranged so as to be able to approach or move away from the clutch center, that holds at least some of the plurality of output side rotating plates that are arranged alternately with the input side rotating plates, and that can press the input side rotating plates and the output side rotating plates together; and a suppression member, and when the clutch center rotates relative to the pressure plate,
  • the clutch includes a center-side cam portion having a center-side assist cam surface that generates a cam thrust from the pressure plate toward the clutch center to increase the pressure contact force between the input-side rotating plate and the output-side rotating plate; the pressure plate is arranged to be able to come into contact with the center-side assist cam surface and includes a pressure-side
  • the suppression member is configured to suppress the specific output side rotating plate and the specific input side rotating plate from approaching each other in at least a portion of the range where the input shaft rotation speed is lower than the rotation speed at which the center side assist cam surface and the pressure side assist cam surface come into contact. According to the above aspect, it is possible to suppress the cam thrust from being suddenly applied to the entire input side rotating plate and the output side rotating plate. This makes it possible to suppress a sudden increase in the pressure contact force between the input side rotating plate and the output side rotating plate.
  • FIG. 8B is a schematic diagram illustrating the action of the center-side slipper cam surface and the pressure-side slipper cam surface.
  • FIG. 9A is a cross-sectional view showing a part of the clutch device in a half-clutch state according to the first embodiment.
  • FIG. 9B is a cross-sectional view showing a part of the clutch device in a state where the clutch according to the first embodiment is engaged.
  • FIG. 10 is a diagram showing the relationship between the positional relationship between the input side rotating plate and the output side rotating plate and the engine speed.
  • FIG. 11 is a diagram showing the relationship between the cam thrust and the rotational driving force transmitted to the output shaft.
  • FIG. 12 is a diagram showing the relationship between the cam thrust and the release amount of the clutch operating lever.
  • FIG. 13A is a cross-sectional view of a clutch device according to a second embodiment.
  • FIG. 13B is a plan view of the suppression member according to the second embodiment.
  • FIG. 13C is a side view of the suppression member according to the second embodiment.
  • FIG. 14 is a cross-sectional view showing a part of the clutch device in a half-clutch state according to the second embodiment.
  • FIG. 15 is a cross-sectional view showing a part of the clutch device according to the second embodiment in an engaged state.
  • FIG. 16 is a cross-sectional view showing a part of a clutch device according to a third embodiment.
  • FIG. 17 is a cross-sectional view of a clutch device according to a fourth embodiment.
  • FIG. 18 is a cross-sectional view showing a part of the clutch device in a half-clutch state according to the fourth embodiment.
  • FIG. 19 is a cross-sectional view showing a part of a clutch device according to the fourth embodiment in a state where the clutch is engaged.
  • FIG. 20 is a cross-sectional view showing a part of a clutch device according to a first modified example.
  • FIG. 21 is a cross-sectional view showing a part of a clutch device according to a second modified example.
  • FIG. 22 is a cross-sectional view showing a part of a clutch device according to a third modified example.
  • First Embodiment 1 is a cross-sectional view of a clutch device 10 according to this embodiment.
  • the clutch device 10 is provided, for example, in a saddle-ride type vehicle such as a motorcycle.
  • the clutch device 10 is a device that transmits or cuts off the rotational driving force of an input shaft (crankshaft) of an engine, which is the power source of the motorcycle, to an output shaft 15.
  • the clutch device 10 is a device that transmits or cuts off the rotational driving force of the input shaft to a driving wheel (rear wheel) via the output shaft 15.
  • the clutch device 10 is disposed between the engine and the transmission.
  • direction D the direction in which the pressure plate 70 of the clutch device 10 approaches and moves away from the clutch center 40
  • direction D the direction in which the pressure plate 70 moves
  • first direction D1 the direction in which the pressure plate 70 approaches the clutch center 40
  • second direction D2 the direction in which the pressure plate 70 moves away from the clutch center 40
  • the circumferential direction (i.e., the rotational direction) of the clutch center 40 and the pressure plate 70 is defined as the circumferential direction S
  • the direction from one center-side cam portion 60 to the other center-side cam portion 60 with respect to the circumferential direction S is defined as the first circumferential direction S1 (see FIG. 2 )
  • the direction from the other center-side cam portion 60 to one center-side cam portion 60 is defined as the second circumferential direction S2 (see FIG. 2 ).
  • the axial direction of the output shaft 15 is the same as direction D.
  • the pressure plate 70 and the clutch center 40 rotate in the first circumferential direction S1 (i.e., the direction from the center-side assist cam surface 60A of one center-side cam portion 60 to the center-side slipper cam surface 60S).
  • first circumferential direction S1 i.e., the direction from the center-side assist cam surface 60A of one center-side cam portion 60 to the center-side slipper cam surface 60S.
  • the above directions are merely defined for the convenience of explanation and do not limit the installation mode of the clutch device 10 or the present invention in any way.
  • the clutch device 10 includes an output shaft 15, a plurality of input rotating plates 20, a plurality of output rotating plates 22, a clutch housing 30, a clutch center 40, a pressure plate 70, a stopper plate 100, and a spring 120.
  • the output shaft 15 is provided with a push rod 16A in its hollow portion 15H and a push member 16B adjacent to the push rod 16A.
  • the hollow portion 15H functions as a clutch oil passage. Clutch oil flows within the output shaft 15, i.e., within the hollow portion 15H.
  • the push rod 16A and the push member 16B are slidably disposed within the hollow portion 15H of the output shaft 15.
  • One end (the end on the left side in the figure) of the push rod 16A is connected to a clutch operating mechanism (not shown) of the motorcycle (e.g., a clutch operating lever or a gear shift button).
  • a clutch operating mechanism not shown
  • the push rod 16A slides within the hollow portion 15H and presses the push member 16B in the second direction D2.
  • a portion of the push member 16B protrudes outward from the output shaft 15 (here, in the second direction D2) and is connected to a release bearing 18 provided on the pressure plate 70.
  • the push rod 16A and push member 16B are formed with a diameter smaller than the inner diameter of the hollow portion 15H, ensuring the flow of clutch oil within the hollow portion 15H.
  • the input side rotating plate 20 is rotated by the rotational drive of the input shaft. As shown in FIG. 1, the input side rotating plate 20 is held on the inner surface of the side wall 33 of the clutch housing 30. The input side rotating plate 20 is held in the clutch housing 30 by spline fitting. The input side rotating plate 20 is provided so that it can be displaced along the axial direction of the clutch housing 30 (i.e., direction D). The input side rotating plate 20 is provided so that it can rotate integrally with the clutch housing 30.
  • the clutch center 40 is housed in the clutch housing 30.
  • the clutch center 40 is arranged concentrically with the clutch housing 30.
  • the clutch center 40 is made of an aluminum alloy.
  • the clutch center 40 has a cylindrical main body 42 and a flange 68 extending radially outward from the outer peripheral edge of the main body 42.
  • the clutch center 40 holds the input side rotating plate 20 and some of the multiple output side rotating plates 22 arranged alternately in direction D.
  • the clutch center 40 holds the output side rotating plates 22 so that they can move relatively in direction D but cannot move relatively in the circumferential direction S.
  • the clutch center 40 rotates together with the output shaft 15.
  • the output shaft holding portion 50 is cylindrical.
  • An insertion hole 51 is formed in the output shaft holding portion 50, into which the output shaft 15 is inserted and spline-fitted.
  • the insertion hole 51 is formed through the base wall 43.
  • the inner surface 50A of the output shaft holding portion 50, which forms the insertion hole 51, has multiple spline grooves formed along the axial direction.
  • the output shaft 15 is connected to the output shaft holding portion 50.
  • the plurality of center side fitting teeth 47 are aligned in the circumferential direction S.
  • the plurality of center side fitting teeth 47 are formed at equal intervals in the circumferential direction S.
  • the center-side fitting teeth 47 are formed with the same shape.
  • the center-side fitting teeth 47 protrude radially outward from the outer peripheral surface 45A of the outer peripheral wall 45.
  • the oil discharge holes 49 are formed by penetrating the outer peripheral wall 45 in the radial direction.
  • the oil discharge holes 49 are formed between adjacent center-side fitting teeth 47. That is, the oil discharge holes 49 are formed in the spline grooves 48.
  • the oil discharge holes 49 are formed on the sides of the center-side cam portion 60.
  • the oil discharge holes 49 are formed on the sides of the center-side slipper cam surface 60S of the center-side cam portion 60.
  • the oil discharge holes 49 are formed closer to the first circumferential direction S1 than the center-side slipper cam surface 60S.
  • the oil discharge holes 49 are formed closer to the second circumferential direction S2 than a boss portion 54 (described later).
  • three oil discharge holes 49 are formed at three locations in the circumferential direction S of the outer peripheral wall 45.
  • the oil discharge holes 49 are arranged at equal intervals in the circumferential direction S.
  • the oil discharge holes 49 connect the inside and outside of the clutch center 40.
  • the oil discharge holes 49 are holes that discharge clutch oil that has flowed into the clutch center 40 from the output shaft 15 to the outside of the clutch center 40.
  • the oil discharge holes 49 discharge clutch oil flowing along the inner circumferential surface 45B of the outer circumferential wall 45 to the outside of the clutch center 40. At least a portion of the oil discharge holes 49 is located opposite the pressure-side fitting portion 88, which will be described later.
  • the output side rotating plate 22 is held by the spline fitting portion 46 of the clutch center 40 and the pressure plate 70. A portion of the output side rotating plate 22 is held by the clutch center 40. More specifically, a portion of the output side rotating plate 22 is held by spline fitting to the center side fitting teeth 47 and spline grooves 48 of the clutch center 40. Another portion of the output side rotating plate 22 is held by the pressure plate 70. More specifically, another portion of the output side rotating plate 22 is held by the pressure side fitting teeth 77 (described below) of the pressure plate 70 (see Figure 4).
  • the output side rotating plate 22 is provided so that it can be displaced along the axial direction of the clutch center 40 (i.e., direction D). The output side rotating plate 22 is provided so that it can rotate integrally with the clutch center 40.
  • the output side rotating plate 22 is a member that is pressed against the input side rotating plate 20.
  • the output side rotating plate 22 is a flat plate formed in an annular shape.
  • the output side rotating plate 22 is formed by punching out a thin plate made of SPCC material into an annular shape.
  • the friction material provided on the input side rotating plate 20 may be provided on the output side rotating plate 22 instead of the input side rotating plate 20, or may be provided on both the input side rotating plate 20 and the output side rotating plate 22.
  • the clutch center 40 has multiple boss portions 54 (three in this embodiment).
  • the boss portions 54 are members that indirectly support the pressure plate 70.
  • the boss portions 54 hold the pressure plate 70 via a stopper plate 100 (see FIG. 1) and a pressure spring 25 (see FIG. 1), which will be described later.
  • the multiple boss portions 54 are arranged at equal intervals in the circumferential direction S.
  • the boss portions 54 are formed in a cylindrical shape.
  • the boss portions 54 are located radially outward from the output shaft holding portion 50.
  • the boss portions 54 extend toward the pressure plate 70 (i.e., toward the second direction D2).
  • the boss portions 54 are provided in the base wall 43.
  • a threaded hole 54H is formed in the boss portion 54, into which the bolt 28 (see FIG. 1) is inserted.
  • the threaded hole 54H extends in the axial direction of the clutch center 40.
  • the center-side fitting portion 58 is located radially outward from the output shaft holding portion 50.
  • the center-side fitting portion 58 is located radially outward from the center-side cam portion 60.
  • the center-side fitting portion 58 is located further in the second direction D2 than the center-side cam portion 60.
  • the center-side fitting portion 58 is formed on the inner peripheral surface 45B of the outer peripheral wall 45.
  • the center-side fitting portion 58 is configured to slidably fit onto the pressure-side fitting portion 88 (see FIG. 4), which will be described later.
  • the inner diameter of the center-side fitting portion 58 is formed with a fit tolerance that allows the flow of clutch oil flowing out from the tip end 15T (see FIG. 1) of the output shaft 15 relative to the pressure-side fitting portion 88. In other words, a gap is formed between the center-side fitting portion 58 and the pressure-side fitting portion 88, which will be described later.
  • the main body 72 includes a cylindrical portion 80, multiple pressure-side cam portions 90, a pressure-side fitting portion 88, and a spring accommodating portion 84 (see also Figure 6).
  • the flange 98 extends radially outward from the outer peripheral edge of the main body 72.
  • the flange 98 extends radially outward from the outer peripheral edge of the pressure-side fitting portion 88.
  • the flange 98 has a pressing surface 98A that applies a pressure force to the input side rotating plate 20 and the output side rotating plate 22.
  • the pressing surface 98A is a surface that comes into direct or indirect contact with the input side rotating plate 20 and the output side rotating plate 22.
  • the pressing surface 98A sandwiches the input side rotating plate 20 and the output side rotating plate 22 between itself and the flange 68 of the clutch center 40.
  • the cylindrical portion 80 is formed in a cylindrical shape.
  • the cylindrical portion 80 is formed integrally with the pressure side cam portion 90.
  • the cylindrical portion 80 accommodates the tip portion 15T (see Figure 1) of the output shaft 15.
  • the cylindrical portion 80 accommodates the release bearing 18 (see Figure 1).
  • the cylindrical portion 80 is the portion that receives the pressing force from the push member 16B.
  • the cylindrical portion 80 is the portion that receives the clutch oil that flows out from the tip portion 15T of the output shaft 15.
  • the pressure-side cam portion 90 is formed in a platform shape with a cam surface made up of an inclined surface that constitutes the Assist & Slipper (registered trademark) mechanism, which slides against the center-side cam portion 60 to generate assist torque or slipper torque.
  • the pressure-side cam portion 90 is formed to protrude in the first direction D1 beyond the flange 98.
  • the pressure-side cam portions 90 are arranged at equal intervals in the circumferential direction S of the pressure plate 70.
  • the pressure plate 70 has three pressure-side cam portions 90, but the number of pressure-side cam portions 90 is not limited to three.
  • the pressure side cam portion 90 is located radially outside the cylindrical portion 80.
  • the pressure side cam portion 90 has a pressure side assist cam surface 90A (see also Figure 7) and a pressure side slipper cam surface 90S.
  • the pressure side assist cam surface 90A is configured to be able to contact the center side assist cam surface 60A.
  • the pressure side assist cam surface 90A is configured to generate a cam thrust in a direction from the pressure plate 70 toward the clutch center 40 in order to increase the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22 when rotating relative to the clutch center 40 during acceleration, etc.
  • the pressure side slipper cam surface 90S is configured to be able to contact the center side slipper cam surface 60S.
  • the pressure side slipper cam surface 90S is configured to move the pressure plate 70 away from the clutch center 40 to reduce the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22 when rotating relative to the clutch center 40, such as during deceleration.
  • the pressure side assist cam surface 90A of one pressure side cam portion 90L and the pressure side slipper cam surface 90S of the other pressure side cam portion 90M are arranged opposite each other in the circumferential direction S.
  • the pressure plate 70 has a pressure-side cam hole 73H that penetrates part of the main body 72 and the flange 98.
  • the pressure-side cam hole 73H is located radially outward from the cylindrical portion 80.
  • the pressure-side cam hole 73H extends radially from the side of the cylindrical portion 80 to a position radially outward from the pressure-side fitting portion 88.
  • the pressure-side cam hole 73H is formed to penetrate between adjacent pressure-side cam portions 90.
  • the pressure-side cam hole 73H is formed to penetrate between the pressure-side assist cam surface 90A and the pressure-side slipper cam surface 90S of adjacent pressure-side cam portions 90.
  • the pressure-side assist cam surface 90A and part of the pressure-side cam hole 73H overlap.
  • the pressure spring 25 is housed in the spring housing portion 84.
  • the pressure spring 25 is held by the boss portion 54 inserted into the insertion hole 84H of the spring housing portion 84.
  • the pressure spring 25 biases the pressure plate 70 toward the clutch center 40 (i.e., toward the first direction D1).
  • the pressure spring 25 is, for example, a coil spring made of spring steel wound in a spiral shape.
  • the pressure side fitting portion 88 is provided on the main body 72.
  • the pressure side fitting portion 88 is located radially outward from the pressure side cam portion 90.
  • the pressure side fitting portion 88 is located further in the second direction D2 than the pressure side cam portion 90.
  • the pressure side fitting portion 88 is configured to be slidably fitted into the center side fitting portion 58 (see Figure 2).
  • the pressure plate 70 has a plurality of pressure side fitting teeth 77 formed on the flange 98.
  • the pressure side fitting teeth 77 hold a portion of the plurality of output side rotating plates 22.
  • the pressure side fitting teeth 77 hold the output side rotating plate 22 so that it can move relatively in direction D and cannot move relatively in the circumferential direction S.
  • the pressure side fitting teeth 77 are located radially outward from the cylindrical portion 80.
  • the pressure side fitting teeth 77 are located radially outward from the pressure side cam portion 90.
  • the pressure side fitting teeth 77 are located radially outward from the pressure side fitting portion 88.
  • the plurality of pressure side fitting teeth 77 are aligned in the circumferential direction S.
  • the plurality of pressure side fitting teeth 77 are arranged at equal intervals in the circumferential direction S. In this embodiment, some of the pressure-side fitting teeth 77 have been removed, which increases the spacing between those teeth, but the remaining adjacent pressure-side fitting teeth 77 are spaced at equal intervals.
  • the stopper plate 100 is arranged so as to be able to come into contact with the pressure plate 70.
  • the stopper plate 100 is a member that prevents the pressure plate 70 from moving away from the clutch center 40 by more than a predetermined distance in the second direction D2.
  • the stopper plate 100 is fixed to the boss portion 54 of the clutch center 40 by a bolt 28.
  • the pressure plate 70 is fixed by tightening the bolt 28 to the boss portion 54 via the stopper plate 100, with the boss portion 54 of the clutch center 40 and the pressure spring 25 arranged in the spring accommodating portion 84.
  • the stopper plate 100 is formed in a ring shape when viewed from above.
  • the spring 120 is held by the clutch center 40.
  • the spring 120 abuts against the outer peripheral surface of the center side mating tooth 47 and is held by the center side mating tooth 47.
  • the spring 120 is held by the center side mating tooth 47 so that it can expand and contract relatively in direction D.
  • Examples of the spring 120 include, but are not limited to, a disc spring, wave spring, coil spring, etc.
  • the spring 120 is, for example, a disc spring, but may also be a wave spring.
  • the spring 120 is an example of an elastic body.
  • the spring 120 is an example of a suppressing member.
  • the spring 120 is arranged between the pressure plate 70 and the output side rotating plate 22CA that is located closest to the second direction D2 among the output side rotating plates 22 held by the clutch center 40.
  • the spring 120 is arranged between the end 77D1 of the pressure side mating tooth 77 in the first direction D1 and the output side rotating plate 22CA.
  • the spring 120 is arranged to be able to come into contact with the end 77D1 of the pressure-side mating tooth 77 in the first direction D1.
  • the spring 120 is arranged to be able to come into contact with the output-side rotating plate 22CA held by the clutch center 40.
  • the input-side rotating plate 20 is arranged radially outward of the spring 120.
  • the outer diameter of the spring 120 is smaller than the outer diameter of the output-side rotating plate 22.
  • the spring 120 absorbs the pressure force and cam thrust in the direction from the pressure plate 70 toward the clutch center 40 (i.e., the first direction D1).
  • the spring 120 is configured to allow the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other, while preventing the input side rotating plate 20 and at least a portion of the output side rotating plate 22 held by the pressure plate 70 from approaching each other, in at least a portion of the range of the half-clutch state (for example, the first operating range RE1 (see Figure 10) in which the engine is in the half-clutch state and the engine is at or below the first engine speed).
  • the "half-clutch state” is a state between a state in which the clutch is engaged and a state in which the clutch is disengaged.
  • Pressure contact refers to a state in which there is no gap between the input rotating plate 20 and the output rotating plate 22, and no slippage occurs between the input rotating plate 20 and the output rotating plate 22. Note that, if a friction material is provided on at least one of the input rotating plate 20 and the output rotating plate 22, the friction material is part of the input rotating plate 20 or the output rotating plate 22.
  • the “clutch engaged state” refers to a state in which all input rotating plates 20 and all output rotating plates 22 are pressure-contacted with each other. In other words, there is no gap between all input rotating plates 20 and all output rotating plates 22, and no slippage occurs between all input rotating plates 20 and all output rotating plates 22.
  • the clutch is not engaged (i.e., in a half-clutch state).
  • the “clutch is disengaged” refers to a state in which there is a gap between the input rotating plate 20 and the output rotating plate 22 held by the clutch center 40 and a gap between the input rotating plate 20 and the output rotating plate 22 held by the pressure plate 70.
  • the “at least a portion of the half-clutch state” refers to, for example, a region in which the rotational driving force transmitted from the input shaft to the output shaft 15 is greater than 0% and less than 50% (e.g., less than 80%) of the rotational driving force transmitted to the input shaft.
  • the cam thrust is absorbed by the spring 120 in at least a portion of the partial clutch state.
  • the spring 120 may be configured to allow the input-side rotating plate 20 and the output-side rotating plate 22 held by the clutch center 40 to approach each other and to prevent the input-side rotating plate 20 and at least a portion of the output-side rotating plate 22 held by the pressure plate 70 from approaching each other in a suppression region that is equal to or lower than a first engine speed (sixth rotation speed E6 in the example shown in FIG. 10 ).
  • allowing approach refers to a case where the input-side rotating plate 20 and the output-side rotating plate 22 are not prevented from approaching each other, and does not include a case where the input-side rotating plate 20 and the output-side rotating plate 22 are prevented from approaching each other even if they approach each other.
  • Preventing approach includes cases where the input side rotating plate 20 and the output side rotating plate 22 do not approach each other at all (i.e., where the distance between the input side rotating plate 20 and the output side rotating plate 22 does not change at all), and cases where the input side rotating plate 20 and the output side rotating plate 22 approach each other (the distance between the input side rotating plate 20 and the output side rotating plate 22 narrows) but the input side rotating plate 20 and the output side rotating plate 22 are prevented from approaching each other (where the distance between the input side rotating plate 20 and the output side rotating plate 22 is prevented from narrowing).
  • the spring 120 has an elastic force that allows the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other, while preventing the input side rotating plate 20 and at least a portion of the output side rotating plate 22 held by the pressure plate 70 from approaching each other, in at least a portion of the half-clutch state (for example, the first operating region RE1 (see Figure 10)).
  • the spring 120 is configured to prevent the pressure plate 70 from approaching the clutch center 40 in at least some regions of the partial clutch state (for example, the first operating region RE1 (see Figure 10)).
  • "Preventing approach” includes cases where the pressure plate 70 does not approach the clutch center 40 at all, and cases where the pressure plate 70 approaches the clutch center 40 slightly (where the amount of approach of the pressure plate 70 is reduced compared to when the spring 120 is not provided).
  • the spring 120 has an elastic force that prevents the pressure plate 70 from approaching the clutch center 40 in at least some regions of the partial clutch state (for example, the first operating region RE1 (see Figure 10)).
  • the spring 120 is configured to suppress the generation of cam thrust in at least a portion of the range of the half-clutch state (for example, the first operating range RE1 (see Figure 10)).
  • "Suppressing the generation of cam thrust” means suppressing the generation of cam thrust between the output side rotating plate 22 held by the clutch center 40 and the input side rotating plate 20 held by the clutch housing 30.
  • the center side assist cam surface 60A and the pressure side assist cam surface 90A are in contact and the input shaft rotation speed exceeds the output shaft 15 rotation speed, cam thrust is generated, but some or all of the generated cam thrust is absorbed by the spring 120, and therefore the cam thrust generated between the output side rotating plate 22 held by the clutch center 40 and the input side rotating plate 20 held by the clutch housing 30 is reduced.
  • the spring 120 has an elastic force that suppresses the generation of cam thrust in at least a portion of the range of the half-clutch state (for example, the first operating range RE1 (see Figure 10)).
  • Spring 120 is configured to suppress the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to output shaft 15 is 50% or less of the rotational driving force transmitted to the input shaft (region greater than 0% and less than 50%).
  • Spring 120 has an elastic force that suppresses the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to output shaft 15 is 50% or less of the rotational driving force transmitted to the input shaft.
  • the spring 120 is configured to allow the input side rotating plate 20 and all output side rotating plates 22 to approach each other in a second operating range RE2 (see FIG. 10) where the engine speed is higher than the first engine speed.
  • a second operating range RE2 see FIG. 10
  • the pressure plate 70 moves in the first direction D1 against the repulsive force of the spring 120, and the input side rotating plate 20 and all output side rotating plates 22 are pressed together, resulting in an engaged clutch state.
  • the engaged clutch state is a state in which 100% of the engine's rotational driving force is transmitted to the output shaft 15.
  • the spring 120 may also be configured to allow the input side rotating plate 20 and all output side rotating plates 22 to approach each other in a non-restriction range where the engine speed is higher than the first engine speed.
  • the spring 120 has an elastic force that allows the input side rotating plate 20 and all of the output side rotating plates 22 held by the pressure plate 70 to approach each other in the second operating region RE2 (see Figure 10).
  • the spring 120 is configured to allow the generation of cam thrust in the second operating range RE2 (see Figure 10). "Allowing the generation of cam thrust” means allowing cam thrust to occur in all output side rotating plates 22 held by the clutch center 40 and pressure plate 70, and in all input side rotating plates 20 held by the clutch housing 30. In other words, the cam thrust generated by contact between the center side assist cam surface 60A and the pressure side assist cam surface 90A is transmitted to all input side rotating plates 20 and output side rotating plates 22 without being absorbed by the spring 120.
  • the spring 120 is configured to allow the generation of cam thrust in a range where the rotational driving force transmitted from the input shaft to the output shaft 15 exceeds 50% of the rotational driving force transmitted to the input shaft.
  • the spring 120 is configured to allow the generation of cam thrust when, for example, the driver releases the clutch lever.
  • the spring 120 is configured to allow the generation of cam thrust, for example, when the clutch is engaged.
  • Figure 10 is a graph showing the relationship between the state of the output side rotating plate 22 and input side rotating plate 20 held by the clutch center 40 and engine speed, and the relationship between the state of the output side rotating plate 22 and input side rotating plate 20 held by the pressure plate 70 and engine speed.
  • the dashed dotted line shows the state of the output side rotating plate 22 and input side rotating plate 20 held by the clutch center 40
  • the solid line shows the state of the output side rotating plate 22 and input side rotating plate 20 held by the pressure plate 70
  • the two-dot chain line shows the state of the output side rotating plate 22 and input side rotating plate 20 held by the pressure plate 70 when the spring 120 is not included.
  • the gap between the output-side rotating plate 22 and the input-side rotating plate 20 held by the pressure plate 70 gradually decreases as the engine speed increases, as shown by the solid line. Then, when the engine speed reaches a seventh rotation speed E7, the gap between the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 disappears. At this time, slippage occurs between the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70, and the slippage is greatest.
  • the seventh rotation speed E7 the rotational driving force begins to be transmitted to the output shaft 15 via the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70.
  • the slippage between the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 gradually decreases, and when the engine speed reaches a ninth rotation speed E9, the slippage between the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 disappears. That is, when the engine speed reaches a ninth rotation speed E9, the output side rotating plate 22 held by the pressure plate 70 and the input side rotating plate 20 are pressed together. When the engine speed reaches the ninth rotation speed E9, the input side rotating plate 20 and all the output side rotating plates 22 are pressed together, and the clutch is engaged.
  • the engine speed (ninth rotation speed E9) when the input side rotating plate 20 and all the output side rotating plates 22 held by the pressure plate 70 are pressed together is higher than the engine speed (eighth rotation speed E8) when the input side rotating plate 20 and all the output side rotating plates 22 held by the clutch center 40 are pressed together.
  • the region from the first engine rotation speed E1 to the sixth engine rotation speed E6 is the first operating region RE1
  • the region higher than the sixth engine rotation speed E6 and equal to or lower than the ninth rotation speed E9 is the second operating region RE2.
  • the sixth engine speed E6 is an example of a first engine speed.
  • the first operating range RE1 may be a range from the first engine speed E1 to the seventh engine speed E7, or may be a range from the first engine speed E1 to a ninth engine speed E9.
  • the first operating range RE1 corresponds to part of the half-clutch state or the entire half-clutch state.
  • the first operating range RE1 includes engine speeds (here, the second engine speed E2 and the fourth engine speed E4) at which cam thrust begins to be generated by the action of the center-side assist cam surface 60A and the pressure-side assist cam surface 90A.
  • the second operating range RE2 corresponds to part of the half-clutch state or a state in which the clutch is engaged.
  • the spring 120 may be configured to allow the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other, and to prevent the input side rotating plate 20 and all the output side rotating plates 22 held by the pressure plate 70 from approaching each other, in at least a portion of the region of the partial clutch state (for example, the first operating region RE1 (see Figure 10)).
  • the spring 120 may have an elastic force that allows the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other, and to prevent the input side rotating plate 20 and all the output side rotating plates 22 held by the pressure plate 70 from approaching each other, in at least a portion of the region of the partial clutch state (for example, the first operating region RE1 (see Figure 10)).
  • the spring 120 may be configured to allow the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other and to prevent the input side rotating plate 20 and at least a part of the output side rotating plate 22 held by the pressure plate 70 from approaching each other in all regions of the partial clutch state (for example, the first operating region RE1 (see FIG. 10) and the second operating region RE2 (see FIG. 10)).
  • the spring 120 may be configured to allow the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other and to prevent the input side rotating plate 20 and all of the output side rotating plates 22 held by the pressure plate 70 from approaching each other in all regions of the partial clutch state.
  • the spring 120 may have an elastic force that allows the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other and prevents the input side rotating plate 20 and at least a portion of the output side rotating plate 22 held by the pressure plate 70 from approaching each other in all regions of the partial clutch state.
  • the spring 120 may have an elastic force that allows the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 to approach each other and prevents the input side rotating plate 20 and all of the output side rotating plates 22 held by the pressure plate 70 from approaching each other in all regions of the partial clutch state.
  • the spring 120 may be configured to prevent the pressure plate 70 from approaching the clutch center 40 in all regions of the partial clutch state.
  • the spring 120 may have an elastic force that prevents the pressure plate 70 from approaching the clutch center 40 in all regions of the partial clutch state.
  • the spring 120 may be configured to suppress the generation of cam thrust in all ranges of the partial clutch state.
  • the spring 120 may have an elastic force that suppresses the generation of cam thrust in all ranges of the partial clutch state.
  • the spring 120 may be configured to suppress the generation of cam thrust in a range (greater than 0% and less than 80%) in which the rotational driving force transmitted from the input shaft to the output shaft 15 is 80% or less of the rotational driving force transmitted to the input shaft.
  • the spring 120 may have an elastic force that suppresses the generation of cam thrust in a range in which the rotational driving force transmitted from the input shaft to the output shaft 15 is 80% or less of the rotational driving force transmitted to the input shaft.
  • the spring 120 may be configured to allow the generation of cam thrust in a range in which the rotational driving force transmitted from the input shaft to the output shaft 15 exceeds 80% of the rotational driving force transmitted to the input shaft.
  • Spring 120 is configured to suppress the generation of cam thrust when the driver is operating the clutch, and to allow the generation of cam thrust when the driver has completed the clutch operation.
  • spring 120 may be configured to suppress the generation of cam thrust when the driver is gripping the clutch lever, and to allow the generation of cam thrust when the driver releases the clutch lever.
  • the clutch device 10 includes a first power transmission path 131 and a second power transmission path 132.
  • the first power transmission path 131 includes the input side rotating plate 20, the output side rotating plate 22 held by the pressure side engaging teeth 77, the pressure side engaging teeth 77, and the pressure side assist cam surface 90A.
  • the first power transmission path 131 is an example of a power transmission path.
  • the second power transmission path 132 includes the input side rotating plate 20, the output side rotating plate 22 held by the center side engaging teeth 47, the center side engaging teeth 47, and the center side assist cam surface 60A.
  • the spring 120 is provided in the first power transmission path 131.
  • the spring 120 is configured to suppress the transmission of power (e.g., torque) from the input side rotating plate 20 to the output side rotating plate 22.
  • the spring 120 is configured to suppress the output side rotating plate 22 held by the pressure plate 70 (e.g., the output side rotating plate 22 held by the pressure side engaging tooth 77) from approaching the input side rotating plate 20.
  • the spring 120 may be configured to suppress the transmission of power from the input side rotating plate 20 to the output side rotating plate 22 so that, at a predetermined engine speed in a partially engaged state, the power transmitted from the input side rotating plate 20 per output side rotating plate 22 of the first power transmission path 131 is smaller than the power transmitted from the input side rotating plate 20 per output side rotating plate 22 of the second power transmission path 132.
  • the spring 120 may be configured to prevent the input side rotating plate 20 and the output side rotating plate 22 held by the pressure plate 70 (e.g., the output side rotating plate 22 held by the pressure side engaging teeth 77) from approaching each other, so that, during the process of the clutch transitioning from a disengaged state to a connected state, the input side rotating plate 20 and the output side rotating plate 22 held by the clutch center 40 (e.g., the output side rotating plate 22 held by the center side engaging teeth 47) are first pressed together, and then the input side rotating plate 20 and the output side rotating plate 22 held by the pressure plate 70 (e.g., the output side rotating plate 22 held by the pressure side engaging teeth 77) are pressed together.
  • the pressure plate 70 e.g., the output side rotating plate 22 held by the pressure side engaging teeth 77
  • the spring 120 may be configured to allow the input side rotating plate 20 and the output side rotating plate 22 held by the pressure plate 70 to approach each other when the pressure plate 70 is positioned closer to the second position P2 (here, toward the first direction D1) than an intermediate position between the first position P1 and the second position P2.
  • the spring 120 may be configured to prevent the input side rotating plate 20 and the output side rotating plate 22 held by the pressure plate 70 from approaching each other when the pressure plate 70 is positioned closer to the first position P1 (here, toward the second direction D2) than the intermediate position.
  • FIG. 11 is a diagram showing the relationship between cam thrust and the rotational driving force transmitted to the output shaft 15. Note that the relationship between cam thrust and the rotational driving force transmitted to the output shaft 15 is not limited to that shown in FIG. 11.
  • the vertical axis represents cam thrust, with the cam thrust when the clutch is engaged being set to 100%.
  • the horizontal axis represents the rotational driving force transmitted from the input shaft to the output shaft 15 transmitted to the input shaft, with the rotational driving force when the clutch is engaged being set to 100%.
  • the dashed line represents the above relationship when the clutch device 10 does not have a spring 120
  • the solid line represents the relationship when the restraint by the spring 120 is released when the rotational driving force transmitted to the output shaft 15 becomes 50% of the rotational driving force transmitted to the input shaft
  • the dashed dotted line represents the relationship when the restraint by the spring 120 is released when the rotational driving force transmitted to the output shaft 15 becomes 80% of the rotational driving force transmitted to the input shaft.
  • the 12 shows the relationship between cam thrust and the release amount of the clutch operating lever. Note that the relationship between cam thrust and the release amount of the clutch operating lever is not limited to that shown in FIG. 12.
  • the vertical axis shows cam thrust, with cam thrust when the clutch is engaged being 100%.
  • the horizontal axis shows the release amount of the clutch operating lever, with 100% being the state when the driver has released their hand from the clutch operating lever.
  • the dashed line shows the relationship when the clutch device 10 does not have the spring 120, the solid line shows the relationship when the restraint by the spring 120 is released when the release amount of the clutch operating lever reaches 75%, and the dashed line shows the relationship when the restraint by the spring 120 is released when the release amount of the clutch operating lever reaches 100%. As shown in FIG.
  • the spring 120 may be configured to prevent the input side rotating plate 20 and all of the output side rotating plates held by the pressure plate 70 from approaching each other in at least a portion of the partial clutch state (for example, the first operating region RE1 (see Figure 10)). This configuration more reliably prevents the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 is disposed between the end 77D1 of the pressure-side mating tooth 77 in the first direction D1 and the output-side rotating plate 22CA that is located furthest in the second direction D2 among the output-side rotating plates 22 held by the clutch center 40.
  • the output-side rotating plate 22 and the input-side rotating plate 20 held by the pressure plate 70 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input-side rotating plate 20 and the output-side rotating plate 22.
  • the spring 120 has an elastic force that prevents the input side rotating plate 20 and at least a portion of the output side rotating plate 22 held by the pressure plate 70 from approaching each other in at least a portion of the partial clutch state (for example, the first operating region RE1 (see FIG. 10)), and allows the input side rotating plate 20 and all of the output side rotating plates 22 held by the pressure plate 70 to be pressed together in the second operating region RE2 (see FIG. 10).
  • the partial clutch state for example, the first operating region RE1 (see FIG. 10)
  • the input side rotating plate 20 and all of the output side rotating plates 22 held by the pressure plate 70 are pressed together in the second operating region RE2 (see FIG. 10).
  • the spring 120 is configured to prevent the pressure plate 70 from approaching the clutch center 40 in at least a portion of the partial clutch state (for example, the first operating region RE1 (see Figure 10)).
  • the input side rotating plate 20 and the output side rotating plate 22 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22. This prevents a sudden increase in the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 has an elastic force that prevents the pressure plate 70 from approaching the clutch center 40 in at least a portion of the partial clutch state (for example, the first operating region RE1 (see Figure 10)).
  • the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 is configured to suppress the generation of cam thrust in at least a portion of the partial clutch state (for example, the first operating region RE1 (see FIG. 10)), and to allow the generation of cam thrust in the second operating region RE2 (see FIG. 10).
  • the generation of cam thrust is suppressed, which prevents the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22. This prevents a sudden increase in the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 is configured to suppress the generation of cam thrust in all ranges of the half-clutch state. According to the above-described aspect, the generation of cam thrust is suppressed in all ranges of the half-clutch state, thereby preventing cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 is configured to suppress the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to the output shaft 15 is 50% or less of the rotational driving force transmitted to the input shaft. According to the above aspect, it is possible to suppress the sudden application of cam thrust to the input side rotating plate 20 and the output side rotating plate 22 in the region where the rotational driving force transmitted to the output shaft 15 is relatively low. This makes it possible to suppress a sudden increase in the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 may be configured to suppress the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to the output shaft 15 is 80% or less of the rotational driving force transmitted to the input shaft, and to allow the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to the output shaft 15 exceeds 80% of the rotational driving force transmitted to the input shaft. According to the above aspect, it is possible to suppress the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22 until the rotational driving force transmitted to the output shaft 15 reaches a relatively high region. This makes it possible to suppress a sudden increase in the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 may be configured to suppress the generation of cam thrust while the driver is operating the clutch, and to allow the generation of cam thrust when the driver has completed the clutch operation. According to the above aspect, the generation of cam thrust can be easily allowed or suppressed based on the driver's intentions.
  • the spring 120 has an elastic force that suppresses the generation of cam thrust in the region where the rotational driving force transmitted from the input shaft to the output shaft 15 is 50% or less of the rotational driving force transmitted to the input shaft. According to the above aspect, the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 are prevented from approaching each other, thereby preventing cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the springs 120 include a first spring 120A and a second spring 120B.
  • the first spring 120A and the second spring 120B are held by the pressure plate 70.
  • the first spring 120A and the second spring 120B are held by the pressure plate 70 so as to be able to expand and contract relatively in direction D.
  • the first spring 120A and the second spring 120B are, for example, wave springs.
  • the first spring 120A is disposed between adjacent output-side rotating plates 22 held by the pressure plate 70.
  • the first spring 120A is provided so as to be able to come into contact with the output-side rotating plates 22 held by the pressure plate 70.
  • the first spring 120A forms a gap between the output-side rotating plate 22PA and the input-side rotating plate 20PA when the center-side assist cam surface 60A and the pressure-side assist cam surface 90A come into contact.
  • the output-side rotating plate 22PA is an example of a specific output-side rotating plate.
  • the input-side rotating plate 20PA is an example of a specific input-side rotating plate.
  • the first spring 120A may be configured to prevent the output-side rotating plate 22PA and the input-side rotating plate 20PA from approaching each other in at least a portion of the range where the rotational speed of the input shaft (i.e., the engine rotational speed) is lower than the rotational speed at which the center-side assist cam surface 60A and the pressure-side assist cam surface 90A come into contact.
  • the first spring 120A may be configured to prevent the output-side rotating plate 22PA and the input-side rotating plate 20PA from approaching each other throughout the entire range from when the input shaft starts to rotate until the rotational speed of the input shaft reaches (increases to) the rotational speed at which the center-side assist cam surface 60A and the pressure-side assist cam surface 90A come into contact.
  • the first spring 120A allows contact between the output-side rotating plate 22PA and the input-side rotating plate 20PA when, for example, the driver gradually releases the clutch lever gripped by the driver and the set load of the pressure spring 25 exceeds the set load of the first spring 120A.
  • the second spring 120B is disposed between the pressure plate 70 and the output side rotating plate 22 held by the pressure plate 70.
  • the second spring 120B is disposed between the output side rotating plate 22 held by the pressure plate 70 and the flange 98 of the pressure plate 70.
  • the second spring 120B is disposed so as to be able to come into contact with the flange 98.
  • the second spring 120B is disposed so as to be able to come into contact with the output side rotating plate 22 held by the pressure plate 70.
  • the second spring 120B is configured to prevent the output side rotating plate 22PB, which is part of the output side rotating plate 22 held by the pressure plate 70 and is in contact with the second spring 120B and is located on the first direction D1 side of the second spring 120B, from approaching each other when the center side assist cam surface 60A and the pressure side assist cam surface 90A come into contact with each other, and the input side rotating plate 20PB, which is adjacent to the output side rotating plate 22PB and is located on the second direction D2 side of the output side rotating plate 22PB.
  • the second spring 120B forms a gap between the output side rotating plate 22PB and the input side rotating plate 20PB when the center side assist cam surface 60A and the pressure side assist cam surface 90A come into contact with each other.
  • the second spring 120B allows contact between the output side rotating plate 22PB and the input side rotating plate 20PB when, for example, the clutch lever gripped by the driver is gradually released and the set load of the pressure spring 25 exceeds the set load of the second spring 120B.
  • the spring 120 may consist of only one of the first spring 120A and the second spring 120B.
  • the cam thrust is absorbed by the first springs 120A and second springs 120B. This prevents the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 from approaching each other. At this time, the output side rotating plate 22 and the input side rotating plate 20 held by the clutch center 40 are pressed together.
  • the second spring 120B is arranged between the output side rotating plate 22PA and the output side rotating plate 22PB adjacent to the output side rotating plate 22PA, among the multiple output side rotating plates 22 held by the pressure plate 70.
  • the second spring 120B is arranged to be able to come into contact with the output side rotating plate 22PA.
  • the second spring 120B is arranged to be able to come into contact with the output side rotating plate 22PB.
  • the first spring 120A and the second spring 120B are arranged radially outward of the pressure side mating teeth 77.
  • the input side rotating plate 20 is located radially outward of the first spring 120A and the second spring 120B.
  • the approach amount L2 is the difference between a distance B1 in the direction D between the output side rotating plate 22CA and the output side rotating plate 22CB before the pressure plate 70 approaches the clutch center 40 by the predetermined distance L, and a distance B2 in the direction D between the output side rotating plate 22CA and the output side rotating plate 22CB after the pressure plate 70 approaches the clutch center 40 by the predetermined distance L.
  • the approach amount L2 is greater than zero.
  • the output side rotating plate 22CB is an example of a third output side rotating plate. In Figure 16, the state before the pressure plate 70 approaches the clutch center 40 by a predetermined distance is shown by a solid line, and the state after the pressure plate 70 approaches the clutch center 40 by a predetermined distance is shown by a two-dot chain line.
  • the first spring 120A and the second spring 120B are configured to prevent the output side rotating plate 22PA and the output side rotating plate 22CA from approaching each other in all ranges of the partial clutch state.
  • the output side rotating plate 22PA and the input side rotating plate 20 are prevented from approaching each other in all ranges of the partial clutch state, thereby preventing the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the clutch device 10 of this embodiment further includes a second spring 120B between adjacent output side rotating plates 22PA and 22PB held by the pressure plate 70.
  • a second spring 120B between adjacent output side rotating plates 22PA and 22PB held by the pressure plate 70.
  • the first spring 120A and the second spring 120B are configured to prevent at least some of the adjacent output side rotating plates 22 (e.g., output side rotating plates 22PA and 22PB) among the multiple output side rotating plates 22 held by the pressure plate 70 from approaching each other when the pressure plate 70 approaches the clutch center 40 by a predetermined distance L in at least some regions of the partial clutch state (e.g., first operating region RE1 (see FIG. 10)), so that approach amount L3 is smaller than approach amount L2.
  • the output side rotating plates 22PA and 22PB held by the pressure plate 70 are prevented from approaching each other, and therefore the cam thrust is prevented from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22. This prevents a sudden increase in the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22.
  • the first spring 120A and the second spring 120B may be configured to prevent at least some adjacent output side rotating plates (e.g., output side rotating plates 22PA and 22PB) of the multiple output side rotating plates 22 held by the pressure plate 70 from approaching each other throughout the entire range of the partial clutch state.
  • output side rotating plates 22 and the input side rotating plate 20 held by the pressure plate 70 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the second springs 120B may be disposed between all adjacent output side rotating plates 22 among the multiple output side rotating plates 22 held by the pressure plate 70. According to the above aspect, the output side rotating plates 22 and the input side rotating plate 20 held by the pressure plate 70 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22.
  • the first spring 120A and the second spring 120B are configured to prevent the output side rotating plate 22PA and the output side rotating plate 22PB from approaching each other so that the gap SA1 becomes larger than the gap SA2 when the pressure plate 70 approaches the clutch center 40 by a predetermined distance L in at least a portion of the partial clutch state (for example, the first operating range RE1 (see FIG. 10)).
  • the input side rotating plate 20 and at least a portion of the output side rotating plate 22 held by the pressure plate 70 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input side rotating plate 20 and the output side rotating plate 22. This prevents a sudden increase in the pressure contact force between the input side rotating plate 20 and the output side rotating plate 22.
  • the spring 120 is held by the pressure plate 70.
  • the spring 120 is held by the pressure plate 70 so as to be able to expand and contract relative to the pressure plate 70 in the direction D.
  • the spring 120 may also be held by the clutch center 40.
  • the spring 120 is held by the clutch center 40 so as to be able to expand and contract relative to the clutch center 40 in the direction D.
  • the spring 120 is, for example, a wave spring.
  • the spring 120 is disposed between a portion 77A of the pressure plate 70 that is radially inward of the pressure-side fitting teeth 77 and an end 45D2 of the outer peripheral wall 45 in the second direction D2.
  • the end 45D2 of the outer peripheral wall 45 in the second direction D2 includes the end 47D2 of the center-side fitting teeth 47 in the second direction D2.
  • the end portion includes a contact surface that comes into contact with the end portion 120D1 of the spring 120 in the first direction D1, and also includes, if a portion that protrudes further in the second direction D2 than the contact surface, the portion.
  • the spring 120 is arranged so that it can come into contact with the radially inner portion 77A and the end portion 45D2 of the outer peripheral wall 45 in the second direction D2.
  • the radially inner portion 77A is located on the first direction D1 side of the flange 98.
  • the radially inner portion 77A is located radially outward of the spring accommodating portion 84.
  • the radially inner portion 77A faces the end portion 45D2 of the outer peripheral wall 45 in the second direction D2.
  • the cam thrust is absorbed by the spring 120. This prevents the output side rotating plate 22 and the input side rotating plate 20 held by the pressure plate 70 from approaching each other. At this time, the output side rotating plate 22 and the input side rotating plate held by the clutch center 40 are pressed together.
  • the cam thrust exceeds the repulsive force of the spring 120, the pressure plate 70 moves in the first direction D1 against the repulsive force of the spring 120, and the input side rotating plate 20 and all of the output side rotating plates 22 are pressed together, resulting in the clutch being engaged.
  • the spring 120 may be disposed between a portion 77A of the pressure plate 70 that is radially inward of the pressure-side mating teeth 77 and the end 45D2 of the outer peripheral wall 45 in the second direction D2. According to the above aspect, the output-side rotating plate 22 and the input-side rotating plate 20 held by the pressure plate 70 are prevented from approaching each other, thereby preventing the cam thrust from being suddenly applied to the input-side rotating plate 20 and the output-side rotating plate 22.
  • the spring 120 may be disposed between the input side rotating plate 20 and the output side rotating plate 22 held by the pressure side mating teeth 77.
  • the technology disclosed herein can be applied to various types of clutch devices.
  • a so-called internal-off clutch device is described as an example in which the pressure plate 70 is located on the opposite side of the clutch housing 30 from the clutch center 40 in the axial direction of the output shaft 15, but this is not limited to this.
  • the technology can also be similarly applied to a so-called external-off clutch device in which the pressure plate 70 is located between the clutch center 40 and the clutch housing 30 in the axial direction of the output shaft 15.

Landscapes

  • 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)
PCT/JP2025/010938 2024-03-25 2025-03-21 クラッチ装置 Pending WO2025205397A1 (ja)

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JP2024-048369 2024-03-25
JP2024048369 2024-03-25
PCT/JP2024/043291 WO2025203895A1 (ja) 2024-03-25 2024-12-06 クラッチ装置
JPPCT/JP2024/043291 2024-12-06

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6196222A (ja) * 1984-10-17 1986-05-14 Kawasaki Heavy Ind Ltd 多板摩擦クラツチ
JPH04362315A (ja) * 1991-06-06 1992-12-15 Kubota Corp 多板クラッチ
JPH0583470U (ja) * 1992-03-06 1993-11-12 日産自動車株式会社 多板締結要素
JP2011064261A (ja) * 2009-09-16 2011-03-31 Honda Motor Co Ltd 多板クラッチ及びその組み付け方法
JP2013137039A (ja) * 2011-12-28 2013-07-11 F C C:Kk 動力伝達装置
JP2018080722A (ja) * 2016-11-14 2018-05-24 アイシン精機株式会社 自動変速機用係脱機構
JP2018169035A (ja) * 2017-03-30 2018-11-01 本田技研工業株式会社 動力伝達装置
JP2023001223A (ja) * 2020-04-13 2023-01-04 株式会社エフ・シー・シー 動力伝達装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6196222A (ja) * 1984-10-17 1986-05-14 Kawasaki Heavy Ind Ltd 多板摩擦クラツチ
JPH04362315A (ja) * 1991-06-06 1992-12-15 Kubota Corp 多板クラッチ
JPH0583470U (ja) * 1992-03-06 1993-11-12 日産自動車株式会社 多板締結要素
JP2011064261A (ja) * 2009-09-16 2011-03-31 Honda Motor Co Ltd 多板クラッチ及びその組み付け方法
JP2013137039A (ja) * 2011-12-28 2013-07-11 F C C:Kk 動力伝達装置
JP2018080722A (ja) * 2016-11-14 2018-05-24 アイシン精機株式会社 自動変速機用係脱機構
JP2018169035A (ja) * 2017-03-30 2018-11-01 本田技研工業株式会社 動力伝達装置
JP2023001223A (ja) * 2020-04-13 2023-01-04 株式会社エフ・シー・シー 動力伝達装置

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