Patent ID: 7148582
Filing Date: 2006-12-12
Classification: B62M

Abstract:
1. A bicycle internal gear shifting hub, comprising: a hub shaft arranged and configured for non-rotatable mounting to a rear portion of a bicycle frame; a drive cylinder rotatably mounted to the hub shaft; a cylindrical hub shell rotatably mounted to the hub shaft; a power transmitting mechanism mounted between the drive cylinder and the cylindrical hub shell for selectively transmitting rotary power from the drive cylinder to the cylindrical hub shell via one of a plurality of transmission paths; a shift mechanism connected to the power transmitting mechanism arranged and configured to shift between the plurality of transmission paths; a generator mechanism mounted within the cylindrical hub shell adjacent to the power transmitting mechanism for generating electric power from rotary movement of the cylindrical hub shell; a shift assist mechanism arranged and configured to transmit a varied amount rotational force from the drive cylinder to the shift mechanism; and a force control mechanism mounted between the drive cylinder and the shift assist mechanism and coupling the drive cylinder to the shift assist mechanism to control the varied amount of rotational force transmitted from the drive cylinder to the shift mechanism.