Continuously variable belt transmission for a vehicle

摘要

A continuously variable belt transmission for a vehicle which can generate a cancellation hydraulic pressure for cancellation with a simple construction, as well as urge a movable sheave in the direction for producing a belt pressing force even at the time a vehicle is towed. A member to form a first hydraulic chamber P 1 where a pressing force acting on the movable sheave is generated and a circular member forming a part of a second hydraulic chamber P 2 where a hydraulic pressure is generated to cancel a centrifugal hydraulic pressure generated in the first hydraulic chamber P 1 are provided, wherein the circular member is formed of an elastic member urging the movable sheave in the direction for generating the belt pressing force at a position of the movable sheave in a predetermined gear ratio.