Design and Contact Characteristics Analysis of Cycloidal Pinwheels

Abstract

The cycloidal pinwheel reduction mechanism constitutes the core component of RV reducers. This paper conducts a comprehensive
design and simulation study of the cycloidal pinwheel system. Design parameters for the cycloidal gear and pin teeth are determined based on
key metrics including rated output torque and transmission ratio. A simulation model was constructed using RecurDyn. Modeling and simulation revealed that maximum contact stress primarily concentrates near the edges of the cycloidal gear tooth surfaces. Theoretical calculations
and finite element analysis results exhibit certain discrepancies, primarily due to significant alterations in contact conditions and actual meshing tooth count caused by elastic deformation of the wheel spokes, which affects finite element outcomes. The model's feasibility has been
validated, providing a theoretical framework and technical pathway for designing similar reducers.