Variable effective diameter pulleys for variable speed transmiss

Details Variable effective diameter pulleys for variable speed transmiss Variable effective diameter pulleys for variable speed transmiss

1993-04-30

1995-11-21

Buiz, Michael Powell

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

474 47, F16H 5546

Patent

active

054681910

ABSTRACT:
Variable effective diameter pulleys comprise identical interleaved sheaves mounted on identical hubs that in turn engage balls in key ways or splines. A single helical spring within the pulley assembly urges the hubs apart to thereby increase the effective pulley diameter. The pulley design is symmetric about the central pulley plane perpendicular to the axis of the pulley. In one embodiment all of the pulley parts with the exception of the spring and balls are conveniently formed with simple sheet metal stampings. Permanent assembly requires only circumferential external welding or circumferential mechanical fastening near the periphery of each sheave. In another embodiment the stamped parts may alternatively be die cast or otherwise formed and welded together. Both embodiments of the pulley are particularly suited to automated assembly and mass production. Also disclosed are governor assemblies attachable to the pulley to provide constant speed operation of the pulley regardless of input belt speed and alternative hub and rim constructions for high volume mass production and assembly to shafts.

REFERENCES:
patent: 1350670 (1920-08-01), Ritter
patent: 2013268 (1935-09-01), Douville
patent: 2107483 (1938-02-01), Knight
patent: 2120383 (1938-06-01), Watson
patent: 2152207 (1939-03-01), Needham
patent: 2210300 (1940-08-01), Magruder
patent: 4398899 (1983-08-01), Wood et al.
patent: 4504022 (1985-03-01), Stang et al.

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