| 摘要 |
A continuously variable transmission (CVT) having air cooling channels built into the outer face of at least one, and preferably more than one, of the sheaves of the clutches. The CVT is comprised of a drive clutch having an input shaft, a driven clutch having an output shaft, and an endless belt disposed about the drive and driven clutches. Each clutch includes an axially stationary sheave and an axially moveable sheave. Each sheave includes a sheave body with an inner, belt-engaging face and an outer face. At least one of the sheaves on one of the clutches has a plurality of generally radially oriented fins extending axially from the outer face of the sheave body. The sheave further includes an outer plate defining with the fins and the outer face of the sheave body a plurality of generally radially oriented air cooling channels. Each channel preferably is open at its radially outward end and at its radially inward end, thereby permitting air to enter the radially inward open ends, pass radially along the channels and exit through the radially outward open ends, thereby helping to cool the sheave body.
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