| 摘要 |
A clutch-type electrical driving device for a bicycle includes a first one-way bearing provided between a transmission sprocket assembly and an electrical driving assembly, and a second one-way bearing provided between the transmission sprocket assembly and a pedal driving assembly. When a user selects to drive sprockets via the electrical driving assembly for moving the bicycle forward, the sprockets would not feed back to bring two pedal assemblies to rotate at the same time. On the other hand, when the user selects to drive the bicycle forward via the pedal driving assemblies, the sprockets would not feed back to rotate the electrical driving assembly. Therefore, the user can ride the bicycle safely because the pedal assemblies would not rotate along with the sprockets when the latter are driven by the electrical driving device to rotate at high speed. A clutch-type drive for the electrical driving device is also disclosed.
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