Metal V-belt type continuously variable transmission

摘要

A metal V-belt type continuously variable transmission in which the length (L) of a side of an element contacting with a V-face of a pulley is shortened to increase a ratio range. The angle of the V-face of the pulley is represented by ( alpha ), and the hertz surface pressure between the pulley and the metal element is represented by ( sigma H), the following relation is established: L PROPORTIONAL sin alpha / sigma H <2>. When the hertz surface pressure ( sigma H) is determined to be between an upper limit value defined by the wear durability of the metal element and a lower limit value defined by the limit tensile force of an endless belt, the element side length (L) can be decreased by decreasing the angle ( alpha ) of the V-face of the pulley. Thus, the distance through which the metal element can be moved radially of the pulley is increased to increase the ratio range. <IMAGE>