Patent ID: 9488539
Filing Date: 2016-11-08
CPC Classification: B62M,G01L

Claim Text:
1. A device for determining the torque applied to a crankset shaft moveable in rotation about an axis of rotation, notably the crankset of a cycle, and including a supporting element, wherein: the crankset shaft has two separate parts: a first part and a second part that are respectively moveable in rotation about an axis of rotation, the supporting element is designed to keep the first part and the second part substantially coaxial with the axis of rotation of the shaft of the crankset, said two parts have respective contact means designed to transform the rotational movement of one of said two parts into a simultaneously translational and rotational movement of the other of said two parts, the contact means being the respective extremities of the two parts, arranged facing one another along the axis of rotation of the shaft of the crankset, said extremities having respectively at least one flat contact surface that is not parallel and not orthogonal to the axis of rotation, said respective contact surfaces of said extremities being designed to bear against one another, said two parts have stop means designed to cooperate with said supporting element to limit the amplitude of the relative translational movement of said two parts, the device has at least one sensing element arranged between the stop means and the supporting element that is designed to supply a signal representing a mechanical stress applied to said at least one sensing element, the device has a processing module configured to determine the torque applied to the crankset shaft as a function of the signal supplied by said at least one sensing element.