Importance

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Abstract

An electric bicycle has: a frame (12); a handlebar (26); a front wheel (38); a rear wheel (62): and a transmission (102) connected to the frame (12). The transmission (102) has: an input shaft (232); an output shaft (114) operatively connected to the input shaft (232); and a housing (106) housing (106) at least a portion of the input and output shafts (232, 114). The bicycle also has a crankshaft (108) operatively connected to the input shaft (232); an electric motor (104) operatively connected to the input shaft (232); a drive sprocket (116) connected to and driven by the output shaft (114); a driven sprocket (118) connected to the rear wheel (62) to drive the rear wheel (62); a flexible drive member (120) engaging the drive and driven sprockets (116), a lowest point of the housing (106) being vertically lower than the drive sprocket (116), the driven sprocket (118) and the flexible drive member (120); a pair of crank arms (110) connected to the crankshaft (108); and a battery pack (130) connected to the frame (12) and electrically connected to the electric motor (104).

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First Claim