The paper presents and improved structure as well as a fuzzy reliable optimal design method mainly for gear parameters of planet reducer with fewer tooth difference in a certain blow molding system, according to the analysis on fault of the original type.

• 摘要通过对某一吹塑系统少齿差行星减速器的故障分析，提出了相应的改进措施外，更重要的是对少齿差行星减速器的啮合参数进行了模糊可靠性优化设计。