Device for measuring the torque transmitted by a power shaft

G - Physics – 01 – L

Patent

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Details

G01L 3/10 (2006.01)

Patent

CA 2725101

The invention relates to a torque measuring device comprising: a power shaft (12) intended to transmit a torque about the axis (A) of the power shaft; a first wheel (18) bearing angular reference marks, said wheel being fastened to the power shaft; a reference shaft (20) provided with a second wheel bearing angular reference marks; a sensor (26) placed so as to face at least one of said wheels in order to determine the torque transmitted by the power shaft. The invention is characterized in that: the first wheel (18) has first and second series of angular reference marks; and the second wheel (22) has third and fourth series of angular reference marks, the reference marks of the first and third series being mutually parallel, whereas the reference marks of the second and fourth series are mutually parallel while being inclined to a first axial plane containing the axis (A), the reference marks of the first series being inclined to the reference marks of the second series, whereby the signal delivered by said sensor (26) is also representative of the temperature of the power shaft (12).

L'invention concerne un dispositif de mesure de couple comportant : un arbre de puissance (12) destiné à transmettre un couple de rotation autour de l'axe (A) de l'arbre de puissance; une première roue (18) portant des repères angulaires, ladite roue étant solidaire de l'arbre de puissance; un arbre de référence (20) pourvu d'une seconde roue portant des repères angulaires; un capteur (26) disposé en regard d'au moins l'une desdites roues pour la détermination du couple transmis par l'arbre de puissance. L'invention se caractérise par le fait que : la première roue (18) comporte des première et seconde séries de repères angulaires; et la seconde roue (22) comporte des troisième et quatrième séries de repères angulaires, les repères des première et troisième séries étant parallèles entre eux, tandis que les repères des deuxième et quatrième séries sont parallèles entre eux tout en étant inclinés par rapport à un premier plan axial contenant l'axe (A), les repères de la première série étant inclinés par rapport aux repères de la deuxième série, grâce à quoi le signal fourni par ledit capteur (26) est également représentatif de la température de l'arbre de puissance (12).

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