Frictional roller type continuously variable transmission

摘要

A lower section (78f) of a piston boss (78d) of a hydraulic cylinder (80) is formed with a small radius and is inserted into a fixed gap provided with respect to the inner peripheral face of the cylinder through hole (60d). A thrust force F is applied to trunnions (46) supporting power rollers(29) and the trunnions (46) deform about a support position connected by an upper link (50) and a lower link (52). At the same time, even if the lower end (78f) of the piston boss (78d) undergoes a large inclination, no adverse effect results on the inner peripheral face of the cylinder through hole (60d). Even if the sliding section of the piston undergoes a large inclination together with a deformation of the trunnions (46), local wear and damage to the sliding face on the cylinder inner periphery can be avoided. <IMAGE>