Development and evaluation of a passively operating load-responsive transmission

A passively operating transmission capable of switching its reduction ratio in response to load torque was developed. The reduction ratio is switched by a clutch that responds to the load torque using a passive magnetic mechanism without any accessory actuators, sensors, electronics or power supplies. This load-responsive transmission contributes to reduce the power, size and weight of the mechanical system and improves its safety and agility since a variant load can be actuated efficiently using a minimal actuator.