Patent ID: 7708660

Claim:
A belt type continuously variable transmission comprising: an adjustable sheave which is provided with a fixed rotor fixed to a revolving shaft and with a movable rotor attached to the revolving shaft by spline fit in a manner inhibiting their relative rotation and allowing axial displacement so that a groove width is adjustable between the movable rotor and the fixed rotor, wherein the revolving shaft is provided with a load supporting portion on which tip surfaces of spline teeth of the movable rotor are in slide contact, whereby a radial load from the movable rotor is supported by the load supporting portion, wherein the load supporting portion on which tip surfaces of spline teeth of the movable rotor are in contact has a diameter larger than a bottom diameter of spline teeth of the revolving shaft, and wherein the load supporting portion on which tip surfaces of spline teeth of the movable rotor are in contact is offset from spline teeth of the revolving shaft along the direction of axial displacement.