As one of the core parts of RV reducer

the fatigue life of cycloidal gears has an important impact on the life of the whole reducer.WorkBench finite element analysis was used to determine the contact stress state and structural weak points of the cycloid gear.On this basis

the mathematical model of contact fatigue life of cycloidal gears was established by Miner linear damage accumulation theory and S-N curve correction theory

and then nCode Designlife

a fatigue life analysis software

was used to analyze the contact fatigue life of cycloidal gears with the maximum contact stress

and the result was 7.6%different from the design life of cycloidal gears under the same load condition.The maximum point of contact fatigue damage of the cycloidal gear was determined.Finally

the reliability of the cycloidal gear was determined based on the contact fatigue life analysis data

which provides a reference for the structural optimization design and reliability analysis of the cycloidal gear.