CLUTCH AND GEAR CHANGE DEVICE HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To suppress an elongation of an axial length of a clutch while reducing a generation diameter of centrifugal hydraulic pressure in a centrifugal hydraulic pressure cancel chamber of the clutch.SOLUTION: A clutch C1 has: a plurality of oil grooves 135d which extend toward an annular wall part 132 in an axial direction from one end of an inner cylinder part 135 of a drum member 130, and are formed in the inner cylinder part 135 with intervals in a peripheral direction so as to be recessed toward the outside of a radial direction rather than an internal peripheral face 135is; a plurality of oil holes 135c which communicate with a centrifugal hydraulic pressure cancel chamber 190, and are opened in the peripherally-adjoining oil grooves 135d and at the internal peripheral face 135is; and a communication oil passage 139 which is defined between the internal peripheral face 135is and the outer peripheral face of a connecting member 125 so as to make a plurality of the oil grooves 135d and a plurality of the oil holes 135c communicate with each other. Working fluids flowing out of a plurality of the oil grooves 135d are supplied to a friction plate 101 and a separator plate 102 as lubrication cooling media.SELECTED DRAWING: Figure 4