Patent ID: 6669589
Filing Date: 2003-12-30
Classification: F16H

Abstract:
A continuously variable transmission including:a plurality of variable pitch pulleys each having a movable disk and a fixed disk and connected with an input shaft and an output shaft; an endless V-belt extended between both said variable pitch pulleys; an operating unit distinguishingly applying a pressing force or elastic force to each of said movable disks of said variable pitch pulleys; a controlling device carrying out a stable transmission between said input and said output shafts; a first transmitting device variably controlling a rotation number and a torque arranged such that said operating unit individually controls and applies a pressing force to one pulley of said both variable pitch pulleys and an elastic force generated by compressing in series a first elastic member to another pulley; a second transmitting device variable controlling a rotation number and a torque arranged such that said operating unit individually controls and applies an elastic force generated by compressing in series a second elastic member to one pulley of said both variable pitch pulleys and a pressing force to another pulley; and switching means achieving high transmission efficiency and wide-band transmissible ratio area by way of alternatively switching from one of said first and second transmitting devices to the other at an optional point of said ratio area.