Dynax Corporation

Ryo Ohashi

Norio Takakura

Shahjada Ahmed Pahlovy

Akihito Oikawa

Problem&#x2014;To provide a friction plate with reduced drag torque. Solution&#x2014;The friction plate is formed with oil grooves having the sectorial shapes spreading toward the inner circumference and the perimeter. The adjacent edges of the friction material segments are provided with the perimeter side vertex and the inner circumference side vertex respectively. The sectorial oil groove opening toward the perimeter side from the inner circumferential side vertexes can discharge a lube oil to the perimeter side efficiently by a centrifugal force. Also, owing to the sectorial oil groove opening toward the inner circumference side from the perimeter side vertexes, a lube oil can be made to run aground onto the friction material segments due to a centrifugal force, thus, reducing the drag torque markedly compared with the conventional plates.

Friction plate

For a friction plate, when a friction clutch is in a disengagement state, a lubricating oil flowing from an outer circumferential oil groove into an inner circumferential side and rides onto a first segment of a first friction material set. For the friction plate, the lubricating oil flowing from an inner circumferential oil groove into the outer circumferential side rides onto a third segment of a second friction material set.

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Chitose, Japan

Ryo Ohashi