Patent ID: 8308591
Filing Date: 2012-11-13
Classification: F16C,F16H

Abstract:
1. A resin pulley comprising: an outer cylindrical portion including an outer circumferential surface on which a belt is to be wound; an inner cylindrical portion which is disposed radially inwards of and concentrically with the outer cylindrical portion; and a plurality of ribs connecting an inner circumferential surface of the outer cylindrical portion and an outer circumferential surface of the inner cylindrical portion, wherein the outer cylindrical portion, the inner cylindrical portion and the ribs are formed integrally from a resin material, wherein the ribs are provided so as to be inclined towards a circumferential direction relative to a radial imaginary line as viewed in an axial direction, wherein radially outer end portions of the ribs are formed such that inclination angles of the respective radially outer end portions relative to the radial imaginary line increase as the ribs extend radially outward, and radially inner end portions of the ribs are formed such that inclination angles of the respective radially inner end portions relative to the radial imaginary line increase as the ribs extend radially inward, wherein a plurality of rib rows, each of which contains the ribs aligned in the circumferential direction, are provided in the axial direction such that a first rib row of the plurality of rib rows is disposed axially inward of a second rib row of the plurality of rib rows, and wherein the radially outer end portions of the ribs of the first rib row are offset, in a circumferential direction, from the radially outer end portions of the ribs of the second rib row.