Development of cycloidal planetary reducer

A cycloidal planetary reducer, which fulfils both high reduction ratio and low vibration in a thin small body, had been proposed to cope with the further downsizing of DC motors. The mechanism is inspired by intellectual toy ‘Spirograph’ structurally based on reducer. Instead internal gear output plate skid epitrochoid groove introduced. sun connected input shaft carrier works as stator. has pin that fits plate. According rotation gear, revolves counter direction speed inverse proportional number epitrochoid. prototype can realize higher compared reducer without unpleasant unavoidable It confirmed idling torque very 0.006Nm, transmission efficiency acceptable 73%. But fluctuation caused cam motion remarkable, will be forthcoming challenges.