INTERIORLY FITTED SHIFTING HUB FOR BICYCLE AND SPEED CHANGE GEAR FOR BICYCLE

摘要

PROBLEM TO BE SOLVED: To provide an interiorly fitted shifting hub etc. in which rotation in the reverse direction is not substantially transmitted from a driving member to a clutch member.;SOLUTION: The interiorly fitted shifting hub of a bicycle is equipped with the driving member 11 mounted on a hub shaft 2 rotatably. A planetary gearing mechanism 5 is coupled in such an arrangement that the rotational power is transmitted from the driving member 11 to the hub body 4 selectively through a plurality of power transmitting paths. A pawl support 22 is installed between the driving member 11 and the clutch member 26 and holds a one-way clutch 20 in such a way that only the rotational driving force in the positive direction is transmitted from the driving member 11 to the pawl support 22. Accordingly the rotational motion in the reverse direction is not substantially transmitted from the driving member 11 to the clutch member 26 at the time of back pedaling. On the other face the driving member is fitted with a periphery extended in the axial direction accommodating a plurality of chain sprockets. In order to manage with an increased mechanical load to the driving member an additional bearing assembly 40 is installed.;COPYRIGHT: (C)2004,JPO&NCIPI