Patent ID: 6820504
Filing Date: 2004-11-23
Classification: B62D,G01L

Abstract:
A rotation sensor comprising:an operative rotor; a follower rotor arranged adjacent to the operative rotor, the follower rotor sharing a rotation axis with the operative rotor and capable of rotation following the operative rotor; and a casing containing the operative and follower rotors and allowing the rotors to rotate freely, wherein a disk-like slip-ring retainer plate is secured to an outer periphery of the operative rotor for rotation together therewith, a pair of feeder slip rings, a pair of rotation-angle measuring slip rings, and a pair of torque measuring slip rings are all disposed on the slip-ring retainer plate and concentrically with the operative rotor, the rotation-angle measuring slip rings and the torque measuring slip rings are covered with conductive resin, the torque measuring slip rings are arranged on one side of the slip-ring retainer plate facing the follower rotor, the feeder slip rings and the rotation-angle measuring slip rings are arranged on the other side of the slip-ring retainer plate opposite to the torque measuring slip rings, feeder brushes and rotation-angle measuring brushes are fixed to the casing for relatively sliding contact with the feeder slip rings and the rotation-angle measuring slip rings, respectively, a disk-like torque measuring brush retainer plate is connected to an outer periphery of the follower rotor for rotation together therewith, torque measuring brushes are fixed to the torque measuring brush retainer plate for relatively sliding contact with the respective torque measuring slip rings, the feeder bushes are electrically connected to each other and are connected to a power supply device, the rotation-angle measuring brushes are electrically connected to the feeder brushes and a rotation-angle computing device, and the torque measuring brushes are electrically connected to the feeder brushes and a torque computing device.