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<p>Cycloidal-pin wheel is a weak link of RV reducer in industry robot application. To calculate the real fatigue life of RV reducer, an iterative algorithm was developed to analyze meshing force and contact stress between needle teeth and cycloidal-pin wheel. An approach to identify the risk zone of the cycloidal-pin wheel, where is prone to occur contact fatigue, was developed by means of locating the position with the maximum contact stress in a working cycle. A method called zone recursion is proposed to extract contact stress spectrum in the risk zone of the cycloidal-pin wheel. The influence of the amount of profile modification on the fatigue life was analyzed. A life test was conducted. The results show that the relative error of contact fatigue life of the cycloidal-pin wheel estimated by using the proposed method was less than 11 % compared with the testing lifetime, which meets actual requirements.</p>

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Fatigue-life estimation method for cycloidal-pin wheel of RV reducer under real load

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Qingchuan He,
  • Chenghui He,
  • Zhonggang Zhu,
  • Qingwang Zhu,
  • Jun Pan

摘要

Cycloidal-pin wheel is a weak link of RV reducer in industry robot application. To calculate the real fatigue life of RV reducer, an iterative algorithm was developed to analyze meshing force and contact stress between needle teeth and cycloidal-pin wheel. An approach to identify the risk zone of the cycloidal-pin wheel, where is prone to occur contact fatigue, was developed by means of locating the position with the maximum contact stress in a working cycle. A method called zone recursion is proposed to extract contact stress spectrum in the risk zone of the cycloidal-pin wheel. The influence of the amount of profile modification on the fatigue life was analyzed. A life test was conducted. The results show that the relative error of contact fatigue life of the cycloidal-pin wheel estimated by using the proposed method was less than 11 % compared with the testing lifetime, which meets actual requirements.