Patent ID: 6810336
Filing Date: 2004-10-26
Classification: G01L

Abstract:
A torque sensor, comprising:a rod twistable in accordance with a distortion torque between one axial end and the other axial end of the rod; a magnet magnetized in an axial direction of the rod and fixed to one axial end of the rod; first and second ring plates fixed to the other axial end of the rod and facing each other in the axial direction for sandwiching the magnet; and a magnetic sensor disposed in a gap between the first and second ring plates for detecting a magnetic flux density in the gap, wherein each of the first and second ring plates includes an aperture, the aperture is alternately disposed in a circumferential direction of each ring plate, the aperture of the first ring plate faces the aperture of the second ring plate in the axial direction, and the first and second ring plates are rotatable against the magnet in accordance with a twist of the rod.