An innovative transmission assembly without bottom bracket for a pedal operated velocipede. The transmission assembly comprises a ring gear suitable for being accommodated in a disc-shaped cavity derived in the frame of the velocipede. The axis of rotation of said gear coincides with the axis of symmetry of said cylindrical cavity and is parallel to the axles of the wheels of the velocipede. The ring gear rests on bearings secured to the frame, in correspondence with said cylindrical cavity, so that the ring gear is free to rotate with respect to said frame, by sliding on said bearings. The pedals are rotationally coupled with the opposed ends of a rod connected to said ring gear by way of one or more flanges. The rod carrying the pedals crosses the center of gravity of said ring gear and is connected to said flanges in correspondence with its own median section.
TRANSMISSION ASSEMBLY WITHOUT BOTTOM BRACKET FOR VELOCIPEDES
GETRIEBEANORDNUNG OHNE TRETLAGER FÜR VELOZIPEDE
ENSEMBLE DE TRANSMISSION SANS PÉDALIER POUR VÉLOCIPÈDES
2019-05-08
Patent
Elektronische Ressource
Englisch
Bicycle middle power transmission mechanism without changing bottom bracket
Europäisches Patentamt | 2024
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