Honda Motor Co., Ltd.
RETROFIT ELECTRIC MACHINE FOR BICYCLE AND BICYCLE

Abstract:

To allow a wide range of existing bicycles to be easily converted into electric power assisted bicycles, a retrofit electric machine for a bicycle includes: a housing (52) configured to be attached to a frame (18) of a bicycle (10), an electric motor (54) attached to the housing (52); an annular rotating plate (84) mounted on the housing (52) in a rotatable manner to be centered around a rotational center line of a crankshaft (24) for a pedal of the bicycle (10), and connected to the electric motor (54) in a torque transmitting relationship; and a connecting member (90) including a first connecting portion (92) connected to the crankshaft (24) with a shape fit so as to rotate integrally with the crankshaft (24), and a connecting pin (98) secured to the rotating plate (84).