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<p>The cycloid-pin gear pair is a core component of the rotary vector (RV) reducer. Its design parameters are numerous and intricately related to transmission performances of RV reducer. To improve load-bearing capacity, life, efficiency and accuracy of RV reducer, this paper proposes a cycloid-pin gear dual multi-objective optimization (MOO) design method. First, mamatical models including cycloid-pin gear contact stress and torsional stiffness, turning arm bearing life, and overall reducer transmission efficiency, backlash and transmission error are established. Meanwhile, relationship between design parameters of cycloid-pin gear and various performance indicators is analyzed. Then, a dual MOO model for cycloid-pin gear is established. First-stage optimization considers macro-scale geometric dimensions to improve load-bearing capacity, life, and efficiency. Second-stage optimization considers micro-scale dimensional accuracy to enhance accuracy. Finally, dual optimization model is applied to cycloid-pin gear design of an RV reducer. Results show that dual MOO method effectively improves transmission performances of RV reducer.</p>

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A novel performance-driven dual multi-objective optimization design method for cycloid-pin gear of RV reducer

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Zhenhua Han,
  • Tianwen Liu,
  • Lang Xu,
  • Wankai Shi,
  • Wentao Shan,
  • Qifeng Tan,
  • Xin Wang

摘要

The cycloid-pin gear pair is a core component of the rotary vector (RV) reducer. Its design parameters are numerous and intricately related to transmission performances of RV reducer. To improve load-bearing capacity, life, efficiency and accuracy of RV reducer, this paper proposes a cycloid-pin gear dual multi-objective optimization (MOO) design method. First, mamatical models including cycloid-pin gear contact stress and torsional stiffness, turning arm bearing life, and overall reducer transmission efficiency, backlash and transmission error are established. Meanwhile, relationship between design parameters of cycloid-pin gear and various performance indicators is analyzed. Then, a dual MOO model for cycloid-pin gear is established. First-stage optimization considers macro-scale geometric dimensions to improve load-bearing capacity, life, and efficiency. Second-stage optimization considers micro-scale dimensional accuracy to enhance accuracy. Finally, dual optimization model is applied to cycloid-pin gear design of an RV reducer. Results show that dual MOO method effectively improves transmission performances of RV reducer.