Electric power-assist device for bicycles and bicycle equipped with said device

1. An electric power-assist device for a bicycle, the device comprising:

an electrical machine including a rotor;

a movable connector structured to support the electrical machine;

a drive pinion arranged to be driven by the rotor of the electrical machine; and

a supporting structure,

wherein the drive pinion is structured to mesh tangentially with a complementary toothing integral to a tyre of a rear wheel of the bicycle when the movable connector is in a meshed position,

wherein the movable connector is structured to move the electrical machine and the drive pinion toward the meshed position and away from the meshed position,

wherein the movable connector is borne by the supporting structure, and

wherein the movable connector together with the electrical machine form a sub-assembly that is manually separatable from the supporting structure.

2. The electric power-assist device according to claim 1 , further comprising a controller arranged to control the electrical machine, wherein the controller is borne by the supporting structure.

3. The electric power-assist device according to claim 1 , further comprising a battery arranged to power the electrical machine, wherein the battery is borne by the supporting structure.

4. The electric power-assist device according to claim 1 , wherein the sub-assembly includes a controller arranged to control the electrical machine.

5. The electric power-assist device according to claim 1 , wherein the sub-assembly includes a battery arranged to power the electrical machine.

6. The electric power-assist device according to claim 1 , wherein the electrical machine is foldable against the sub-assembly.

7. The electric power-assist device according to claim 5 , wherein the battery is manually separatable from the supporting structure independently of the sub-assembly.

8. The electric power-assist device according to claim 1 , wherein the sub-assembly is carried by a framework extending in a substantially horizontal plane, the sub-assembly being separatable horizontally from the supporting structure.

9. The electric power-assist device according to claim 8 , wherein the sub-assembly is separatable transversely from the supporting structure.

10. The electric power-assist device according to claim 1 , wherein the supporting structure includes a rapid electrical connector arranged to connect the sub-assembly to at least one interface integral with the bicycle.

11. The electric power-assist device according to claim 1 , wherein the supporting structure is configured to be a luggage rack.

12. An electric power-assist device for a bicycle, the device comprising:

an electrical machine including a rotor;

a connector structured to attach to the electrical machine;

a drive pinion arranged to be driven by the rotor of the electrical machine; and

a supporting structure,

wherein the drive pinion is structured to mesh tangentially with a complementary toothing integral to a tyre of a rear wheel of the bicycle,

wherein the connector is borne by the supporting structure,

wherein the connector together with the electrical machine form a sub-assembly that is manually separatable from the supporting structure, and

wherein the connector includes an oscillating arm articulated relative to a mount borne by the supporting structure, around an axis substantially parallel to an axis of the electrical machine.

13. The electric power-assist device according to claim 1 ,

wherein the device is included as part of a kit for the bicycle, and

wherein the kit includes a pneumatic tyre structured to have the complementary toothing.

14. The electric power-assist device according to claim 13 , wherein the kit is included as part of the bicycle.