Torque detector

摘要

An object of the present invention is to provide a compact torque detector. The present invention solving the object has a conversion member 23 provided on the outer circumferences of an input shaft 20 and an output shaft 21 for convert the amount of relative rotation of the input and output shafts to a displacement in the axis direction; an annular-shaped ring member 26 secured on the outer circumference of the conversion member 23 and made up of a magnet; and a plurality of magnetically sensitive devices 27 arranged at intervals around the ring member 26 and facing the ring member. The magnetically sensitive device 27 detects the amount of travel of the ring member 26 in the axis direction and supplying the detected amount as a voltage signal to a controller C.