Reducers 减速器
Precision gearing — harmonic and RV reducers — that turns fast, low-torque motors into the slow, high-torque, zero-backlash motion a robot joint needs.
Reducers are the mechanical heart of every articulated robot joint. A servo motor spins fast but with little torque; a reducer trades that speed for the slow, powerful, repeatable motion an arm needs to position a payload to a fraction of a millimetre. Two families dominate: harmonic (strain-wave) reducers, prized for near-zero backlash and used in the smaller, distal joints of arms and humanoids, and RV (cycloidal) reducers, which carry the high loads of the larger, proximal joints.
Reducers are the single most cost- and precision-critical component in a robot, and historically the hardest to localise. Japanese suppliers long held a near-monopoly, but Chinese makers have closed much of the gap, reshaping cost structures across the whole industry — a humanoid robot can need 20 to 40 reducers, so price and supply here move the economics of the entire sector.
What to watch
- Humanoid demand multiplying reducer volumes per robot
- Chinese import-substitution narrowing the precision gap with Japan
- Roller-screw and planetary alternatives for linear humanoid actuators
Key Players
Representative companies operating in this part of the value chain.
Originator and largest maker of strain-wave (harmonic) precision reducers used in robot joints.
Visit website →The dominant supplier of RV cycloidal reducers for heavy industrial-robot joints.
Visit website →China’s leading domestic harmonic-reducer maker, a key import-substitution supplier.
Large precision-gear maker supplying RV reducers and robot drivetrains.