Continuously variable transmission

摘要

The invention relates to a continuously variable transmission having a V-belt (13) wound around a drive pulley (11) and a driven pulley (12). The invention aims to provide a cooling structure for a V-belt type continuously variable transmission which can increase a cooling effect for a V-belt. The invention proposes to improve the continuously variable transmission in that plural radiation fins (12j) are formed in substantially concentric cycles on an external surface of the driven pulley.