Patent ID: 6484592
Filing Date: 2002-11-26
Classification: G01L

Abstract:
A steering force detecting magnetostrictive torque sensor comprising: a sensor shaft mounted between a steering shaft and a steering output shaft; a magnetic anisotropy at a surface of the sensor shaft; a coil bobbin wound by an excitation coil and a detection coil to surround the magnetic anisotropy; and a yoke surrounding the coil bobbin,the steering force detecting magnetostrictive torque sensor further comprising a casing including a casing main body formed from a non-magnetic high conductive material as a container having one side opening and an access panel to cover the opening, wherein the coil bobbin and the yoke constitute a magnetism detection unit, which is arranged inside the casing main body while forming a sufficient space around the magnetism detection unit to effectively eliminate an energy loss, and a through hole arranged at two end portions in the axial direction of the magnetism detection unit in the casing main body for inserting the sensor shaft, so that the sensor shaft is rotatably attached to the through holes via a bearing.