Document Type and Number:
Japanese Patent JPS5734150
Kind Code:
B2
Abstract:
A stepless transmission device for a bicycle which has sufficient durability and smooth operation characteristics for practical use is provided. The transmission device can steplessly change the rotational ratio of a wheel to a drive sprocket by changing the oscillation angle of rachet arms which are radially disposed on the periphery of a disk fixed to a shaft for said sprocket. The transmission device is characterized in that said rachet arms incorporated with respective crank arms are pivoted to said sprocket in positions equally distributed on a coaxial circle, and one end of each crank arm constitutes a guide pin, said guide pin being engaged in an annular groove which is coaxially provided in a rotatable bearing race the eccentricity of which can be changed.
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Application Number:
JP11773578A
Publication Date:
July 21, 1982
Filing Date:
September 23, 1978
Export Citation:
International Classes:
B62M9/06; B62M9/08; F16H29/14