continuous belt drive, engine with the stepless belt drive, belt drive, and vehicle with the stepless continuously variable getriebesystem role

摘要

The invention relates to belt type continuously variable transmission, power unit having belt type continuously variable transmission, vehicle carrying belt type continuously variable transmission and sheave for belt type continuously variable transmission. The belt type continuously variable transmission (15), comprising a primary sheave (29), a secondary sheave (30), and a belt (31). The primary sheave (29) further comprises a first sheave body (34a), a second sheave body (34b) forming, between the clearance thereof from the first sheave body (34a), a belt groove (37) for wrapping around the belt (31) therein, a plurality of pressing bodies (45) varying the width of the belt groove (37) by sliding the second sheave body (34b) according to a centrifugal force, and a plurality of stoppers (66) limiting the movement of the pressing bodies (45) by coming into contact with the outer surfaces (47a) of the pressing bodies (45) when the second sheave body (34b) reaches a least reduction gear ratio position where the width of the belt groove (37) is narrowest. The stoppers (66) are formed in such a shape that promotes the wear of a part of the outer surfaces (47a) of the pressing bodies (45).