| 摘要 |
The present invention relates to a cylindrical poly-V pulley made of metal sheet suitable for forcedly fitting a one-way clutch or a bearing. The present invention can easily provide thick ears for preventing a V-belt from disengaging, and ensure an enough length of an axial straight line of a bore of a peripheral wall. Ears (2, 2) for preventing the V-belt from disengaging, are protrusively shaped in an annular state on axially both ends on an outer surface of a cylindrical peripheral wall (1). The each ear (2) includes an inner ear portion (2a) outwardly protruded from the both ends of the peripheral wall (1) and an outer ear portion (2b) folded back from the protruded outer end of the inner ear portion (2a) to the outer surface of the inner ear portion (2a) so as to be closely overlapped with each other, and the inner end surface of the ear (2) is flush with the inner surface of the peripheral wall (1). Therefore, the ear (2) can be thickened by an overlap structure by the inner and outer ear portions (2a) and (2b), and the length of the axial straight line of the bore of the peripheral wall (1) can be ensured for the thickness of the outer ear portion (2b).
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