Patent ID: 6318188
Filing Date: 2001-11-20
Classification: B62D,G01L

Abstract:
A torque detector for detecting torque applied to a first shaft and a second shaft which are arranged coaxial to each other and whose ends are opposed to each other, the first shaft and the second shaft being connected together by an elastic member, the torque detector comprising:movable bodies, each having one end connected to the first shaft and an other end connected to the second shaft, said movable bodies being arched and having center portions which are displaced in a radial direction, relative to a rotational axis of the first shaft and the second shaft, by a change in a curvature of the arch, due to a change in a distance between both of the ends of each of the movable bodies, according to a relative torsion angle between the first shaft and the second shaft; andmeans for detecting the displacement of each of the movable bodies, comprising:first means for varying impedance according to the radial displacement of the center portions of each of the movable bodies, positioned to be next to the movable bodies in a radial direction relative to the rotational axis of the first shaft and the second shaft, intervening air gap provided between said movable bodies and said first means, and wherein the movable bodies are positioned closer to the rotational axis than said first means; andsecond means, electrically connected to said first means, for obtaining an amount of torque on the elastic member by detecting variation in the impedance of said first means.