FRICTION WHEEL TYPE CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To prevent a force which is generated between a coupling on a friction wheel support member and a coupling fitting hole on a link by a friction wheel snapping and pressing force between an input and an output disks from promoting inclination of the link. SOLUTION: In view of a plane including a swing axis of a friction wheel support member 4 and crossing at right angles with a pivotal axis 15 of a link 5, an outer periphery surface 9a of a coupling 9 rotatably supporting the member 4 through a bearing 10 is formed in a shape that a middle portion is higher than an edge portion and its curvature radius is maintained the same as a distance R between the link pivotal axis 15 and a remotest part of the coupling outer periphery surface 9a. An inner periphery surface 14a of a coupling fitting hole 14 formed on the link 5 is annular and coaxial with the swing axis. A force vectorβgenerated between the coupling outer periphery surface 9a and the coupling fitting hole inner periphery surface 14a through friction wheels by a snapping and pressing force between an input and an output disk positions on an extension of a line connecting a link pivotal axis 15 and an outer direction force action point 16 and does not have crossing angles with this line in both cases that the link 5 is maintained level: (a) and that the link 5 is inclined byα: (b). The outer direction forceβtherefore does not promote inclination of the link 5 during shifting speed.