Patent ID: 7762915

Claim:
A continuously variable transmission comprising: a primary pulley including: a first fixed sheave coupled with an input rotation shaft, and a first movable sheave configured to move on the input rotation shaft in an axial direction of the primary pulley; and a secondary pulley connected with the primary pulley by a belt, the secondary pulley including: a second fixed sheave coupled with a follower rotation shaft disposed substantially parallel to the input rotation shaft, and a second movable sheave configured to move on the follower rotation shaft in the axial direction, wherein at least one of the primary and secondary pulleys includes: an axially fixed wall configured to rotate integrally with the corresponding rotation shaft, and a movable cylinder, configured to move and rotate integrally with the corresponding movable sheave, cooperating with the fixed wall to define a cylinder chamber of the corresponding pulley, and having a cylindrically-shaped opening axially outside of the cylinder chamber, the movable cylinder being arranged to permit the opening to axially overlap with at least a portion of a bearing which rotatably supports the corresponding rotation shaft, wherein the axially fixed wall is placed axially between the bearing and the movable sheave of the corresponding pulley, wherein the axially fixed wall comprises a first extending portion radially extending in a form of a disc from the corresponding rotation shaft to a radially outer end of the first extending portion, and a second extending portion extending in a form of an annular ring from the radially outer end of the first extending portion toward a corresponding movable sheave side, wherein an outer radius of the bearing is larger than a radius of the radially outer end of the first extending portion, wherein the continuously variable transmission further comprises: a side-case configured to cover the primary and secondary pulleys in the axial direction; and a support member including: a connecting portion fixedly connected with the side-case, an outer ring support portion fixedly supporting an outer ring of the bearing from a corresponding movable sheave side, against the side-case, in the axial direction, and an axially extending portion extending from the connecting portion angularly in a radial direction and the axial direction to the outer ring support portion; wherein the axially fixed wall extends radially up to an inner circumference of the movable cylinder to define the cylinder chamber of the corresponding pulley, and wherein an axial position and a radial position of the connecting portion of the support member is offset from an axial position and a radial position of the outer ring support portion of the support member.