Self-propelled robot

1. A self-propelled robot for the treatment of a surface, comprising:

a protective guard;

at least one tool;

movement means comprising at least two motor-driven wheels to allow the movement of the self-propelled robot on a travel path;

at least one mechanical power transmission designed to actuate the self-propelled robot, and

wherein the at least one mechanical power transmission comprises at least one motor element and at least one driven element,

the mechanical power transmission being operatively associated with the at least two motor-driven wheels of the movement means, characterised in that the motor element of the mechanical power transmission comprises an electric motor having an energizing drum keyed on its own shaft, the energizing drum being rotatable about an axis of rotation (“X”),

the mechanical power transmission being operatively associated via magnetic coupling with an extractor of the at least one tool, and

wherein the driven element of the mechanical power transmission comprises at least one driven crown having a plurality of plates made of ferromagnetic material and respective hubs of the at least two motor-driven wheels.

2. The robot according to claim 1 , wherein the energizing drum comprises, on a peripheral surface, a plurality of plates made of magnetic material and a central body designed to house the magnetic material plates.

3. The robot according to claim 1 , wherein the driven crown is positioned along the axis of rotation (“X”) in coaxial manner relative to the energizing drum, the driven crown is concentric relative to the energizing drum.

4. The robot according to claim 1 , wherein the driven element of the mechanical power transmission comprises an impeller of the at least one tool.

5. The robot according to claim 2 wherein the plurality of magnetic material plates of the energizing drum are numerically equal to respective plates of the plurality of plates made of ferromagnetic material of the driven crown, the energizing drum being housed inside the protective guard.

6. A self-propelled robot for the treatment of a surface, comprising:

a protective guard;

at least one tool;

movement means comprising at least two motor-driven wheels to allow the movement of the self-propelled robot on a travel path;

at least one mechanical power transmission designed to actuate the self-propelled robot, and

wherein the at least one mechanical power transmission comprises at least one motor element and at least one driven element,

the mechanical power transmission being operatively associated with the at least two motor-driven wheels of the movement means, characterised in that the motor element of the mechanical power transmission comprises an electric motor having an energizing drum keyed on its own shaft, the energizing drum being rotatable about an axis of rotation (“X”), and

wherein the driven element of the mechanical power transmission comprises at least one driven crown having a plurality of plates made of ferromagnetic material, respective hubs of the at least two motor-driven wheels and an impeller of the at least one tool.

7. The robot according to claim 6 , wherein the mechanical power transmission is operatively associated via magnetic coupling with an extractor of the at least one tool.

8. The robot according to claim 6 , wherein the energizing drum comprises, on a peripheral surface, a plurality of plates made of magnetic material and a central body designed to house the magnetic material plates.

9. The robot according to claim 6 , wherein the driven crown is positioned along the axis of rotation (“X”) in coaxial manner relative to the energizing drum, the driven crown is concentric relative to the energizing drum.

10. The robot according to claim 8 wherein the plurality of magnetic material plates of the energizing drum are numerically equal to respective plates of the plurality of plates made of ferromagnetic material of the driven crown, the energizing drum being housed inside the protective guard.