Driven clutch device for V-belt type automatic transmission

Claim 1

A driven clutch device for a V-belt automatic transmission having a drive shaft supported in a single bearing means and a driving pulley mounted thereon with a symmetrical V-shaped groove therein and a stationary sheave on the driving shaft adjacent the bearing means and a movable sheave on the shaft on the opposite side of the stationary sheave from the bearing means and movable toward and away from the stationary sheave for varying the size of the V-shaped groove, a V-belt around said driving pulley in said V-shaped groove, and a driven shaft supported in a single bearing means, said driven clutch device comprising a stationary sheave around said driven shaft having a cylindrical part extending coaxially with said driven shaft toward the free end of the driven shaft, a coupling attached to said cylindrical part and closing the open end thereof and attached to the end of said driven shaft, a movable sheave slidably mounted on said driven shaft between the stationary sheave and the bearing means for movement along said driven shaft and defining a symmetrical V-shaped groove in which said V-belt is positioned, said movable sheave having a cylindrical extension coaxial with said driven shaft and extending slidably through said stationary sheave, a cam bracket on said cylindrical extension within said cylindrical part and having cam surfaces thereon facing said stationary sheave, said stationary sheave having contact parts thereon projecting toward and contacting said cam surfaces for moving said cam bracket away from said stationary sheave on relative rotation in one direction, and a torsion spring means between said cam bracket and said stationary sheave urging said stationary sheave and said cam bracket apart, whereby said movable sheave is urged toward said stationary sheave.