ROTATION DETECTOR AND TORQUE SENSOR

摘要

A first and a second rotary bodies are provided coaxially, with one body capable of rotating relatively to the other. A slider 33 is provided which is coaxially located with one of the rotary bodies, connected through a slide guide means 34 to the one rotary body and as a result restricted from rotating relatively to the one rotary body while its axial displacement is permitted. There are provided a movable-side magnet 32 secured coaxially to the slider 33, and a fixed-side magnet 31 secured coaxially to the other rotary body and restricted from axially moving. The movable-side magnet 32 and the fixed-side magnet 31 are magnetized so that the magnitude of the magnetic force axially working on both magnets changes corresponding to the rotary position of one magnet relative to the rotary position of the other magnet. A detecting means for detecting the magnitude of relative rotary displacement between the first and second rotary bodies is provided.