An electric assist device for a bicycle comprising a shaft coupled in rotation with a pair of cranks and being able to be rotated in a positive direction by an electric motor, a connection mechanism being placed between the motor and the shaft, which connection mechanism has at least three distinct states. The states includes State 1, termed assist state, in which the motor transmits a torque to the shaft via a drive part which rotates at the same speed as the shaft, State 2, termed freewheel state, in which the rotation of the shaft in the positive direction is greater than that of the drive part, and State 3, termed disconnection state, in which a rotation in the positive direction or in the negative direction of the shaft cannot cause the motor to rotate.
DISPOSITIF D'ASSISTANCE ÉLECTRIQUE POUR VÉLO
ELECTRIC ASSIST DEVICE FOR A BICYCLE
ELEKTRISCHE UNTERSTÜTZUNGSVORRICHTUNG FÜR EIN FAHRRAD
2021-09-22
Patent
Elektronische Ressource
Französisch