Tesla is gearing up to unveil the latest iteration of its Optimus humanoid robot, along with a set of new patents for the hands and arms. The company filed two patents on the same day as the “We, Robot” event in October 2024, focusing on Tesla’s mechanically actuated, tendon-driven architecture.
The groundbreaking designs aim to address the challenges of developing humanoid robots, particularly in the hands and arms. By relocating heavy actuators to the forearm, routing cables through a sophisticated wrist design, and incorporating innovative joint assemblies, Tesla is able to achieve human-like dexterity while maintaining lightweight construction and enabling high-volume manufacturing.
The primary patent, titled “Mechanically Actuated Robotic Hand,” outlines a cable/tendon-driven system where actuators are housed in the forearm instead of the hand. Each finger boasts four degrees of freedom (DoF), with an additional two DoF in the wrist. Three thin, flexible control cables extend from the forearm actuators to the fingers, passing through the wrist to enable independent bending without unintended motion.
A standout feature of the design is the wrist’s cable transition mechanism, which reduces cable stretch, torque, friction, and crosstalk during wrist movements. This innovation supports smoother and more reliable multi-axis wrist operation, crucial for complex real-world tasks.
Companion patents provide further depth to the design, covering the overall forearm-to-palm-to-finger assembly and joint assembly for robotic appendages. These patents emphasize precise control and smooth pivoting, enhancing durability and simplifying mass production.
Tesla executives have acknowledged the hand as the most challenging component of the Optimus robot. Elon Musk has described it as the majority of the engineering difficulty of the entire project, likening the challenge to developing the Cybertruck or Model X. Overcoming these hurdles has been a significant achievement for Tesla, with Musk noting that the electromechanical hand represents about 60 percent of the overall challenge.
The newly filed patents showcase Tesla’s commitment to overcoming engineering challenges and developing elegant solutions for humanoid robotics. By focusing on high-volume manufacturing and human-like dexterity, Tesla is positioning itself as a leader in the field of general-purpose robotics. The Optimus v3 hand represents a significant step forward in the quest to create a truly capable humanoid robot.