The present invention pertains to a toothed pulley (21) for a bicycle rear derailleur (100), the pulley (21) carrying on each of its side faces a polygonal cushioning ring (24) made of an elastically deformable material and adapted to come in contact with link plates of a roller chain (23) running over the pulley (21), wherein the pulley (21) includes respective circumferential supports (25) formed adjacent to each side face of the pulley (21) and extending axially away from the side face of the pulley (21), wherein each polygonal cushioning ring (24) is supported in a rotationally secured manner by a respective circumferential support (25), wherein in a side view of the pulley (21), as seen in the axial direction, each polygonal cushioning ring (24) has a preformed polygonal outline at the face facing the roller chain (23), wherein the number of corners of the polygonal cushioning ring (24) is equal to the number of teeth (22) of the pulley (21), and wherein the corners of the polygonal cushioning ring (24) are angularly offset from the centers of the teeth (22) of the pulley (21) by the half angular distance between adjacent teeth (22) of the pulley (21) in a mounted state of the polygonal cushioning ring (24).
PULLEY FOR A REAR DERAILLEUR OF A BICYCLE
RIEMENSCHEIBE FÜR EINE KETTENSCHALTUNG EINES FAHRRADS
POULIE POUR UN DÉRAILLEUR ARRIÈRE DE BICYCLETTE
2025-04-09
Patent
Electronic Resource
English