Patent ID: 8424662
Filing Date: 2013-04-23
Classification: F16D

Abstract:
1. A multi-plate clutch system comprising: a clutch outer connected to an input member; a clutch inner connected to an output member; a plurality of driving friction plates engaged with the clutch outer movably in an axial direction, and unrotatably relative to the clutch outer; a plurality of driven friction plates alternately overlapped with the driving friction plates, and engaged with the clutch inner movably in the axial direction, and unrotatably relative to the clutch inner; a pressure plate movable in the axial direction to bring the driving friction plates and the driven friction plates into pressure contact with each other, thereby frictionally engaging the driving friction plates and the driven friction plates together; a clutch spring for biasing the pressure plate in a direction in which the driving friction plates and the driven friction plates are brought into pressure contact with each other; and at least one of assist means and slipper means, the assist means configured to increase a pressure contact force produced by the pressure plate when torque is changed for acceleration, the slipper means configured to decrease the pressure contact force produced by the pressure plate when the torque is changed for deceleration, wherein said at least one of the assist means and the slipper means includes paired cam plates which are opposed to each other in the axial direction, a ring member whose inner peripheral surface is put in sliding contact with an outer peripheral surface of a first cam plate out of the paired cam plates is fixed to the clutch inner, and an oil discharging passage for guiding oil to a sliding contact portion between the first cam plate and the ring member is provided in an outer peripheral edge portion of a concave cam formed in the first cam plate.