Endless power transmission belt-type continuously variable transmission

Abstract

Among V-faces (48) of a pulley (15), a portion (48a) that is radially further inside than a predetermined position P1 is susceptible to slip against a metal belt (19), but making a shape of the generatrix of the portion (48a) on the radially inner side into a straight line enables a large coefficient of friction against the metal belt (19) to be ensured, thereby reliably preventing slip from occurring. Furthermore, by making, among the V-faces (48) of the pulley (15), a shape of the generatrix of a portion (48b) that is radially further outside than the predetermined position P1 into a curved line that curves in a direction that compensates for misalignment (C) of the metal belt (19) ensures that the metal belt (19) smoothly bites into the V-faces (48), thereby enabling the durability of the metal belt (19) or the pulley (15) to be enhanced. When the shape of the generatrix of the V-faces (48) is a curved line, the coefficient of friction against the metal belt (19) decreases, but since the portion (48b) of the V-faces (48) on the radially outer side is a portion that is naturally resistant to the occurrence of slip of the metal belt (19), there is no possibility of slip occurring even if the coefficient of friction decreases.

Dependencies are inferred from the claim text.