| 摘要 |
PURPOSE:To prevent the shortage of oil supply onto a clutch plate by installing an oil flow-out preventing weir onto a clutch hub made of sheet metal which is used for a humid type multidisc clutch for automatic transmission. CONSTITUTION:An oil flow-out preventing weir 10F is formed on the back surface of the spline teeth 10C by the press slits 10E. Therefore, the oil which flows along a boss part 10B by the centrifugal force due to the revolution of a clutch hub 10 is supplied onto a clutch plate 20 through an oil passage hole 10D from the back surface of the spline teeth 10C. While the oil is checked by the oil flow-out preventing weir 10F. Therefore, almost all the oil which flows along the boss part 10B is introduced into the oil passage hole 10D, and the shortage of oil supply onto the clutch plate is prevented.
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