WANG Wei,ZHANG Ruiliang,XU Huaizhe,et al. Design and analysis of three-term cosine cam wave generators for harmonic reducers[J]. Journal of Mechanical Transmission,2026,50(1):119-125.
WANG Wei,ZHANG Ruiliang,XU Huaizhe,et al. Design and analysis of three-term cosine cam wave generators for harmonic reducers[J]. Journal of Mechanical Transmission,2026,50(1):119-125. DOI: 10.16578/j.issn.1004.2539.2026.01.015.
Design and analysis of three-term cosine cam wave generators for harmonic reducers
has its profile curve directly affecting the deformation and stress distribution of the flexible wheel. To reduce the stress on the flexible wheel and improve its fatigue performance
a design method for a three-term cosine cam wave generator was proposed.
Methods
2
The profile curve of the three-term cosine wave generator was composed of a constant term
represented by the base circle radius
and three cosine terms superimposed. By using the curvature variation coefficient at the major axis
the correction factor at the minor axis
and the clearance of the flexible bearing as variable parameters
the influence of these parameters on the performance of the wave generator was analyzed
and the optimization of a specific harmonic reducer model was validated. Finite element analysis was performed on the flexible wheel structure after incorporating the new cam structure under expansion
no-load
and loading conditions
and comparisons were made with the pre-optimized structure to analyze the stress distribution on the flexible wheel.
Results
2
The finite element results indicate that
compared to the traditional cosine wave generator
the flexible wheel under the three-term cosine wave generator exhibits superior stress performance under various working conditions and achieves longer fatigue life.
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