The invention relates to the technical field of bicycles, in particular to an automatic speed-changing device. The automatic speed-changing device comprises a pull wire, a derailleur, a drive mechanism, a sensor and a controller, wherein one end of the pull wire is connected with the output end of the drive mechanism, and the other end of the pull wire is connected with the derailleur; the drive mechanism and the sensor are electrically connected with the controller respectively; the sensor is used for monitoring a movement frequency value of a pedal crank and sending the movement frequency value to the controller; the controller generates a movement instrument of a corresponding gear according to the movement frequency value and sends the movement instruction to the drive mechanism; the drive mechanism executes the movement instruction, and the derailleur is adjusted to be at an angle of the corresponding gear under drive of the pull wire. According to the automatic speed-changing device, the controller controls the drive mechanism, and the pull wire changes the angel of the derailleur, so that automatic bicycle speed changing can reach the best state.
Automatic speed-changing device
2015-09-30
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
Automatic direction-changing and speed-changing reset device
Europäisches Patentamt | 2023
|