INTERNAL GEAR-CHANGE BICYCLE HUB Russian patent published in 2003 - IPC

FIELD: transport engineering; bicycles. SUBSTANCE: invention relates to leverages used to change over planetary train built into bicycle hub. Proposed bicycle hub 10 with internal gear changing contains axle 21 to secured train on bicycle frame. Drive member 22 coupled with sprocket 32 and outlet member 23 coupled with wheel flanges 37 are installed for rotation relative to axle 21 of hub. Planetary mechanism 24 is installed between drive member 22 and outlet member 23 to transmit rotation force from drive member 22 to outlet member 23 through great number of power transmission paths. Drive mechanism 25 is designed for displacement along axle of hub to select one of power transmission paths and it is arranged, at least partially, inside axle 21 of hub. Members of operating mechanism 26 are installed on carrying bracket mounted on hub axle 21 between rear stop 2a of bicycle frame and hub without possibility of turning and displacement along hub axle 21. Invention prevents damaging of operating mechanism at preservation of simple design of its leverage. EFFECT: improved reliability. 14 cl, 10 dwg