Pedal for bicycles

1. A pedal for bicycles comprising:

a pedal-pin which extends along a reference axis and has a first axial end structured for being coupled to a pedal crank of a bicycle,

a pedal-body that comprises a hub coupled in a freely rotatable manner on said pedal-pin so as to rotate around said reference axis,

electronic measurement means, which are firmly coupled to the pedal-pin and configured to provide electrical measurement signals indicative of the deformation of the pedal-pin caused by the force exerted by the cyclist on the pedal-pin during the pedaling,

a mechanical clamping member which is structured so as to axially clamp said hub of the pedal-body to said pedal-pin,

characterised in that:

said pedal-pin has two annular shoulders coaxial with the reference axis; on said pedal-pin an annular seat is obtained, coaxial with said axis, said annular seat has two inner side walls each forming a corresponding annular shoulder of said pedal-pin,

said mechanical clamping member comprises:

a first clamping element which is arranged on said pedal-pin to rotate around the reference axis and is positioned in abutment against at least on of said shoulder in order to be axially clamped along said axis,

said first clamping element is arranged in said annular seat such as to slide in the same, thus being able to freely rotate on the pedal-pin around the reference axis and remains axially trapped in the annular seat in abutment against at least one of said annular shoulders,

and a second clamping element that firmly couples said hub to said first clamping element so that said hub is axially clamped onto the pedal-pin.

2. The pedal according to the claim 1 , wherein said first clamping element comprises at least one semi-cylindrical body; said second clamping element comprises fastening means, structured to fasten said hub to at least one of the semi-cylindrical bodies.

3. The pedal according to claim 2 , wherein a radial opening is obtained on said semi-cylindrical body; said fastening means comprise a rod that radially passes through said hub and protrudes from the same to radially engage said opening of said semi-cylindrical body.

4. The pedal according to claim 1 , wherein said second clamping element comprises a locking ring nut which is arranged on said pedal-pin next to at least one said shoulder, is connected to a first end of the hub, and is radially coupled to said first clamping element so as to keep it in abutment against at least one said shoulder of the pedal-pin.

5. The pedal according to claim 1 , comprising a support and rotation bushing which is interposed between an approximately central portion of said pedal-pin and said hub.

6. The pedal according to claim 5 , wherein said shoulders is obtained on a portion of said pedal-pin comprised between said first end of said pedal-pin and said rotation bushing.

7. The pedal according to claim 1 , wherein said electronic measurement means are arranged on an intermediate portion of said pedal-pin which is positioned inside said hub and is sized so that said electronic measurement means do not interfere with said hub during its rotation.

8. The pedal according to claim 1 , wherein said pedal-pin comprises, or is coupled to, a tubular portion which extends inside said hub and is internally provided with a seat which extends coaxial with the axis and is designed to house electrical power-supply means electrically connected to said electronic measurement means for powering the same.