| 摘要 |
The invention relates, in particular, to an electric power-assist device for bicycles, said device comprising: an electric machine (2) comprising a rotor; means (4) for securing the electric machine; a driving pinion (3) driven by the rotor of the electric machine; and a frame (10), said device being characterised in that the driving pinion can mesh tangentially with complementary teeth (51) solidly connected to a tyre (5) of a rear wheel (61) of the bicycle, and in that the securing means are borne by the frame, said securing means, together with the electric machine, forming a sub-assembly (20) that can be manually separated from the frame. |
