FIELD: physics, robotics.
SUBSTANCE: invention relates to robotics and can be used in designing humanlike robots. A robotic arm joint comprises a shoulder cover, a forearm cover, an elbow cover, identical shoulder rotary unit and elbow bending unit, consisting of first and second discs, a ball bearing and a planetary double-reduction gear, consisting of a crown gear, a satellite gear unit with a carrier, a second carrier and a sun gear. The first disc of the shoulder rotary unit is attached to a stepper motor whose axle is linked to the input shaft of the shoulder rotary unit, and the first disc of the elbow bending unit is attached to a motor with worm gear whose axle is linked to the input shaft of the elbow bending unit.
EFFECT: invention simplifies the design, improves compactness and enables to maintain the hand position when the power supply of the motors is turned off.
5 dwg
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