Patent ID: 11859674
Assignee: KABUSHIKI KAISHA F.C.C.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A clutch device to allow or interrupt transfer of a rotation driving force of an input shaft to an output shaft, the clutch device comprising:
a clutch center housed in a clutch housing holding a plurality of input-side rotating plates rotationally driven by rotational driving of the input shaft, the clutch center holding a plurality of output-side rotating plates and being operable to be rotationally driven together with the output shaft, the input-side rotating plates and the output-side rotating plates being alternately arranged; and
a pressure plate movable toward or away from the clutch center and rotatable relative to the clutch center, the pressure plate being operable to press the input-side rotating plates and the output-side rotating plates; wherein
the pressure plate includes:
a pressure-side cam portion including at least one of a pressure-side assist cam surface and a pressure-side slipper cam surface, the pressure-side assist cam surface being operable to generate a force in a direction from the pressure plate toward the clutch center in order to increase a pressing force between the input-side rotating plates and the output-side rotating plates upon rotation relative to the clutch center, the pressure-side slipper cam surface being operable to cause the pressure plate to move away from the clutch center in order to reduce a pressing force between the input-side rotating plates and the output-side rotating plates upon rotation relative to the clutch center;

the clutch center includes:
a center-side cam portion including at least one of a center-side assist cam surface and a center-side slipper cam surface, the center-side assist cam surface being operable to generate a force 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 upon rotation relative to the pressure plate, the center-side slipper cam surface being operable to cause the pressure plate to move away from the clutch center in order to reduce the pressing force between the input-side rotating plates and the output-side rotating plates upon rotation relative to the pressure plate; and
assuming directions in which the pressure plate moves are movement directions, a direction in which the pressure plate moves toward the clutch center is a first direction, and a direction in which the pressure plate moves away from the clutch center is a second direction, at least one of the pressure plate and the clutch center includes a boss extending in the movement directions, and the other of the pressure plate and the clutch center includes a through hole which penetrates therethrough along the movement directions and in which the boss is insertable;

the through hole extends in circumferential directions and allows movement of the boss along the circumferential directions and the movement directions; and
while a surface of the pressure-side cam portion on a side of the first direction and a surface of the center-side cam portion on a side of the second direction are in contact with each other, a distal end of the boss projects outward from the through hole.