Present application situation and technical,technological level of electronbeam welding for automotive gears in China was introduced and needs of elec-tron beam welders in gear industry during State s Eighth five year plan wereanalysed generally in this paper.

Design theory and application of planet gear style wobble box;

The influence of allocation of systematic parameters on the reliability of multi-staged planet gear transmission;

Design of continuous automatic indexing mechanism in compound planet gears;

Model and motion simulation of planetary gear drive;

Comparison between conventional design and optimal design for planetary gear reducers;

Study on the adjust turn angle planetary gear of stepless speed adjustor;

Kinetics analysis of oil-bound film even-load mechanism for planet-gear;

On load sharing condition,the planet-gear shows several advantages such as great transmission ratio,compact structure,high efficiency,large load capacity and drive steady.

Application of large submersible pump with epicyclic gear to Huangtang Pumping Station;

Teh repot relative failure analyzed epicyclic gear of early serious failure make use of macrographic examination and micrographic observation and advanced correct ways.