FRICTION PLATE AND WET MULTI-PLATE CLUTCH PROVIDED WITH FRICTION PLATE

摘要

Provided are: a friction plate that takes in large quantities of air into a lubricating oil at the friction surface and reduces the shear resistance of the lubricating oil interposed between friction members, thereby greatly reducing the drag torque during idling compared to what has been conventional; and a wet multi-plate clutch provided with the friction plate. At the friction plate, a plurality of friction element segments are affixed in a ring shape on a ring-shaped core plate, and the friction plate has friction element segments provided with an oil groove having an end that terminates between an inner and outer peripheral edge and an opening that opens in the outer peripheral edge direction of the friction plate, an oil pathway that interconnects in the inner-outer peripheral edge direction of the friction plate is provided between the friction element segments, and the oil pathway at least at one section has a first shape having a width in the peripheral direction that becomes narrower from the inner peripheral edge of the friction plate towards the outer peripheral edge.