Patent ID: 8910532

Claim:
A rotation-angle and torsion sensor for a shaft comprising two shaft sections between which a torsion rod is placed, the sensor comprising: a first gear that is connected torque-proof with the first shaft section; a second gear, that is connected torque-proof with the second shaft section, with the first and second gears having the same number of teeth; a third gear that meshes with the first gear; a fourth gear and a fifth gear which mesh with the second gear; wherein the third and the fourth gear have the same number of teeth, which is smaller than the number of teeth of the first and the second gear; wherein the fifth gear has a number of teeth that differs by at least one from the number of teeth of the fourth gear, exactly two magnets that are assigned one to each of the fourth and fifth gear and magnetic sensors that are assigned to the third, fourth and fifth gears; wherein circular-segment-shaped magnetic guides are attached on the fourth gear; wherein magnetic flux guides are attached on the third gear, the ends of which guides are placed at an interval to the circular-segment-shaped magnetic guides; and wherein the magnetic flux guides attached on third gear have legs which are situated on both sides of the magnetic sensor assigned to the third gear; wherein the magnet assigned to the fourth gear is coupled to the sensor assigned to the third gear by the circular-segment-shaped magnetic guides attached on the fourth gear and by the magnetic flux guides attached to the third gear; wherein the magnet assigned to the fourth gear is also coupled to the sensor assigned to the fourth gear; and wherein the sensor on the third gear outputs the torque angle.