The paper presents a concept of epicyclical gear train able to generate a variable gear ratio law. The basic mechanical configuration consists of three non-circular gears in a typical planetary arrangement. Such a mechanism couples the advantages of non-circular gears with the typical performances of epicyclical gear trains. Therefore this kind of planetary gear train is useful when the synthesis of a specific torque curve or the design of a function generator involve a highly variable input/output relationship, especially if small weights and sizes are required. An application is presented, where a planetary gear train with non-circular gears is proposed in order to design a power drive mechanism for high performance bicycles. Such a device maximizes the human output during a typical low-speed way of pedalling. (c) 2005 Elsevier Ltd. All rights reserved.

Geometric design of a planetary gear train with non-circular gears

MUNDO, DOMENICO
2006-01-01

Abstract

The paper presents a concept of epicyclical gear train able to generate a variable gear ratio law. The basic mechanical configuration consists of three non-circular gears in a typical planetary arrangement. Such a mechanism couples the advantages of non-circular gears with the typical performances of epicyclical gear trains. Therefore this kind of planetary gear train is useful when the synthesis of a specific torque curve or the design of a function generator involve a highly variable input/output relationship, especially if small weights and sizes are required. An application is presented, where a planetary gear train with non-circular gears is proposed in order to design a power drive mechanism for high performance bicycles. Such a device maximizes the human output during a typical low-speed way of pedalling. (c) 2005 Elsevier Ltd. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/153101
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