An electric assist bicycle is provided so as to detect a torque by means of a magneto-striction torque sensor and keep high torque detection capability while detecting a rotation of a crank shaft or the like. The outer periphery of a crank shaft 7a has a cylindrical human power transmission member 28 having a torque sensor 31 for detecting a human driving force, an intermediate cylinder 23 that receives a human driving force transmitted from the human power transmission member 28, and an interlocking member 29 that receives the human driving force transmitted from the intermediate cylinder 23. A one-way clutch 30 is disposed between the intermediate cylinder 23 and the interlocking member 29. A rotation detector 10 is provided to detect a rotation of a rotating body 11 attached to the intermediate cylinder 23. The rotation detector 10 is an optical sensor.
ELECTRICALLY ASSISTED BICYCLE
ELEKTRISCH UNTERSTÜTZTES FAHRRAD
VÉLO ÉLECTRIQUEMENT ASSISTÉ
2016-03-23
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |