Joint driving actuator and medical system

    公开(公告)号:US11109927B2

    公开(公告)日:2021-09-07

    申请号:US16343787

    申请日:2017-10-13

    Abstract: A joint driving actuator that includes an ultrasonic motor that generates driving force for driving a joint, the ultrasonic motor including a stator fixed to a side of one arm that relatively rotates in the joint and a rotor fixed to a side of another arm that relatively rotates in the joint, the stator including a piezoelectric element that generates ultrasonic vibration, a torque sensor that detects external force applied to the joint, and an encoder that detects a rotational angle of the ultrasonic motor, the encoder being mounted on the one arm, the stator being fixed on the side thereof, and the torque sensor being mounted on the another arm, the rotor being fixed on the side thereof.

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