Lite3 is a quadruped hobby-kit robot from Luwu Dynamics’ XGO line — four legs for locomotion, plus a small two-joint arm mounted on its back ending in a fixed claw, letting it pick up and carry small objects rather than just walk.
The mechanism
Each leg carries three revolute joints (hip, thigh, shank) for twelve degrees of freedom of locomotion. The arm adds two more independently actuated revolute joints (a shoulder-style swing and a forearm extension), for fourteen degrees of freedom total. The claw at the end of the arm is a fixed, non-actuated end effector — it doesn’t open or close, so it isn’t counted as a degree of freedom.
About these files — read before importing
This gallery entry links directly to the official luwu_mjlab repository — Luwu Dynamics’ own MuJoCo reinforcement-learning training environment for the XGO robot line, which bundles a real URDF description for each robot it trains. ARMOR links to this file and its meshes unmodified, exactly as Luwu Dynamics committed them.