Abstract: A continuously variable transmission including an input pulley having a first subassembly supported upon a first rotatably driven shaft and an output pulley having a second subassembly supported upon a second rotatable shaft. Each subassembly includes a plurality of left link elements extending from segmented pulley segments to a first shaft supported rotating element, along with a plurality of right link elements extending from the segmented pulley segments to a second shaft supported rotated element for positioning the segmented pulley segments in an outwardly circumferentially arrayed fashion about each of the first and second shafts.

Abstract: An automatic stepless speed-changing mechanism mainly includes a pivotal shaft, a plurality of mounting discs mounted along the pivotal shaft and provided with radially extended guide rails, a plurality of axial rods separately axially extended through the guide rails to slide and rotate therein, a transmission gear, a restoring mechanism, and driving members mounted on the axial rods, and a transmission member wound around the driving members. The driving members are preferably gears, and the transmission member is preferably a chain. When the transmission member brings the driving members to move, the axial rods, which are connected to the driving members and the transmission gear and the restoring mechanism, are caused to slide within the guide rails, resulting in changes in a radius of turn of the driving members to provide the function of automatic stepless change of speed.