Patent ID: 6928888
Filing Date: 2005-08-16
Classification: G01L

Abstract:
1. A torque sensor comprising: a first shaft and a second shaft connected coaxially; a torsion bar converting a torque applied between said first shaft and said second shaft into a torsion displacement; a multipolar magnet fixed to said first shaft or to one end of said torsion bar; one set of magnetic yokes fixed to said second shaft or to the other end of said torsion bar and disposed in a magnetic field generated by said multipolar magnet, said magnetic yokes being opposed to each other via an air gap in an axial direction; and a magnetic sensor for detecting the density of magnetic flux generated in said air gap, wherein a non-magnetic spacer is disposed between said magnetic yokes as a means for positioning said one set of magnetic yokes, said spacer and said one set of magnetic yokes are integrated by resin molding, said spacer has a single annular body, said one set of magnetic yokes are assembled to both end surfaces of said single annular body of the spacer, and said spacer has at least one positioning portion for positioning said one set of magnetic yokes.