The invention relates to a bicycle gearshift (10), comprising a first body configured to be associated with a bicycle frame, a second body (36) connected to, and moveable with respect to, said first body, a rocker arm (20) rotatably connected to said second body (36) at a rotation axis (X), a shaft (23) extending coaxially to said rotation axis (X) and fixedly associated with said rocker arm (20). A unidirectional rotation device (80) is operatively arranged between said shaft (23) and said second body (36) to allow the rotation of said shaft (23) with respect to the second body (36) only in a first direction of rotation about said rotation axis (X). A first elastic element (40) is associated with the second body (36) and with the rocker arm (20) to push said rocker arm (20) in rotation about said rotation axis (X) in said first direction of rotation. A damping device (50) is operatively arranged between said shaft (23) and said unidirectional rotation device (80) to generate a friction force when said rocker arm (20) is moved about said rotation axis (X) in a second direction of rotation opposite to said first direction of rotation. The damping device (50) comprises at least one friction surface (52) extending axially along a direction substantially parallel to the rotation axis (X) and in contact with said unidirectional rotation device (80).
BICYCLE GEARSHIFT
FAHRRADGANGSCHALTUNG
DÉRAILLEUR POUR BICYCLETTE
2025-02-19
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |