Belt type continuously variable transmission, power unit having the belt type continuously variable transmission, vehicle carrying belt type continuously variable transmission, and sheave for continuously variable transmission

摘要

A belt type continuous variable transmission 15 comprises a primary sheave 29 , a secondary sheave 30 , and a belt 31. The primary sheave 29 comprises a first sheave body 34a , a second sheave body 34b that forms between it and the first sheave body 34a a belt groove 37 , about which a belt 31 is entrained, a plurality of push bodies 45 that slide the second sheave body 34b according to centrifugal forces to change a width of the belt groove 37 , and a plurality of stoppers 66 that restrict movements of the push bodies 45 by contacting with outer surfaces 47a of the push bodies 45 when the second sheave body 34b reaches a position of minimum transmission gear ratio, in which the belt groove 37 is made smallest in width. The stoppers 66 are shaped to accelerate partial wear of the outer surfaces 47a of the push bodies 45.