Transmission with Self-Adjustable Rotative Speed, for Bicycles
Journal Title: RECENT - Year 2010, Vol 11, Issue 30
Abstract
Different bicyclists have various objectives: some use it for performance, others for relaxation, others simply for traveling. Consequently, the maximal value of the power that the bicyclist is capable or is disposed to develop at the pedal shaft differs from case to case. Therefore, the bicycle gearings should be personalized. Conceiving and using a transmission with self-adjustable rotative speed, innovative and simple, easy to personalize for the various bicyclists’ requirements and performances, would be particularly advantageous from the bicyclist’s standpoint, who will no longer be preoccupied with periodically effecting the necessary adjustments for the bicycle advancement to adapt to the road and environmental conditions, which are frequently changing. Several principle solutions were studied, even some which conserve the chain gearing. The most adequate transmission with self-adjustable rotative speed for the purpose aimed at proved to be one with trapezoidal belt and speed variator with cone pulleys, only disposed on the pedal shaft. The target group for bicycles provided with self-adjustable rotative speed transmission are middle-aged bicyclists, frequent users of this transport means, non-pretentious as regards the special provision of the bicycle, relatively easy-going, little interested in frequently regulating the gearing ratio or even annoyed by the necessity of effecting this adjustment. This group of bicyclists is numerous and stable, representing a great potential for the market success of the bicycles provided with self-adjustable rotative speed transmission. The paper presents the structure and the functioning of a transmission with self-adjustable rotative speed, destined for equipping bicycles and makes considerations as regards the potential users of such equipped bicycles.
Authors and Affiliations
Romeo CIOARĂ, Ovidiu SÎRBU
Keywords
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