10S 自転車駆動機構の高効率化(スポーツ工学シンポジウム2001)

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This paper describes new types of drive units for bicycle which have linear drive. Usually muscle works while the lenngth of muscle becomes short. That work is called "Positive Work". In Positive Work the energy made by muscle is effective to move bicycle or human body. Unusually, for example at downstairs, muscle works while the length of muscle becomes long. It is called "Negative Work". In Negative Work the energy made by human being and the energy given to muscle by outside become heat. When foot moves circular on conventional bicycle, the muscle must make much negative work. But the muscle makes little negative work when foot moves linearly.We have made 4 types of linear drive system and realize high efficiency.
一般社団法人日本機械学会の論文
2001-11-07