Optimization of mechanical interface for a practical micro-reducer

A micro-reducer, which is characterized by its smaller size, higher reduction ratio and higher reliability, has been successfully developed. To improve the mechanical interface (microscopic design and tribology) of such a micro-mechanism, the configuration, materials, fabrication and surface modification were investigated. The internal energy dissipation of the micro-reducer with two types of bearings and lubrications was measured. Finally the developed micro-reducer, which comprises a 3K-type mechanical paradox planetary gear reduction system and simple gear trains, with oil-lubricated rolling bearing and raw gears was observed to have sufficient performance after 5,000,000 rotations