V-belt type continuously variable transmission

摘要

A V-belt type continuously variable transmission having a driving pulley (11), a driven pulley (12) and a V-belt (13) wrapped around said pulleys. A cooling means comprises a blower fan (24) provided in a transmission case (10), and a blower casing (26) surrounding said blower fan. Said blower casing has boost passages (26a,26c), each farther apart from said blower fan than the one upstream thereof in the rotating direction of said blower fan, and discharge ports (26d-26f) formed at the downstream ends of said boost passages.