BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION, POWER UNIT HAVING 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).