The present invention relates to a bicycle derailleur gear, particularly a front derailleur gear, with improved reliability that comprises a kinematic mechanism in the form of a four-bar linkage (11) with a base body (12) and a mobile body (14) connected together through a pair of connecting rods (13,15) hinged to the base body (12) and to the mobile body (14) at four pin elements (16,17,18,19), the mobile body (14) carrying a chain guide (21), the four-bar linkage-kinematic mechanism (11) being associated with derailleur gear actuation means (28) suitable for deforming the four-bar linkage-kinematic mechanism (11) so as to determine a displacement of the mobile body (14) with respect to the base body (12) and consequently a displacement of the chain guide (21), the derailleur gear actuation means (28) being of the motorized type and comprising a motor casing (30) and an outlet shaft (29) that projects directly from said motor casing (30) and characterised in that the actuation means (28) command a translation in the axial direction of the outlet shaft (29) with respect to the motor casing (30) and are mounted between distinct components (12,13,14,15) of the four-bar linkage-kinematic mechanism (11) through interposition of at least one tilting interface (26,36) about a fifth pin element (25) substantially parallel to the pin elements (16,17,18,19).
Bicycle derailleur gear, particularly a front derailleur gear, with improved reliability
Fahrradkettenschaltung, insbesondere ein vorderer Umwerfer, mit verbesserter Zuverlässigkeit
Engrenage de dérailleur de bicyclette, particulièrement un engrenage de dérailleur avant, avec fiabilité améliorée
21.09.2016
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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