Patent ID: 8152665

Claim:
A pulley structure for a pulley used in a belt-type continuously variable transmission, comprising: a first annular member having a sheave surface mounted on a first shaft that is formed as an input shaft or an output shaft of the continuously variable transmission, and a second annular member having the same shape as that of the first annular member mounted on a second shaft that is slidable in the axial direction relative to the first shaft, the annular members mounted on the first and second shafts being assembled as the pulley; wherein a through hole through which the first shaft can penetrate is formed in each of the annular members, and a step portion that has an inner circumferential surface with a diameter larger than a diameter of an inner circumferential surface of the through hole and substantially the same as a diameter of an outer circumferential surface of the second shaft is formed on a back surface side of the sheave surface of the each of the annular members; the second shaft is a hollow cylindrical member into which the first shaft can be inserted, and a cylindrical end surface and a cylindrical outer circumferential surface of the cylindrical member are fit into the step portion of the second annular member; and a flange portion having a diameter substantially the same as the diameter of the cylindrical outer circumferential surface of the second shaft is formed on an outer circumferential surface of the first shaft, and an outer circumferential surface and a side surface of the flange portion are fit into the step portion of the first annular member.