传动可靠度约束下RV减速器加工精度等级优选方法

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (2) : 7-15.

论文

宿月文1，郭彩霞1，王参军1，朱爱斌2

作者信息 +

Selection of optimal manufacuturing tollerance level for a RV reducer under the contrasint of transmission reliability

SU Yuewen1，GUO Caixia1，WANG Canjun1，ZHU Aibin2

Author information +

文章历史 +

摘要

加工误差是影响RV减速器传动精度的关键因素。为评估多种加工误差对该机构的传动误差的影响机制，基于轮齿接触分析方法构建了考虑齿廓修形、加工误差和装配误差时渐开线齿轮及摆线针轮两级传动的轮齿接触方程，得到不同制造误差作用下摆线针轮行星传动误差分析模型，并评估了各种制造误差对机构传动误差的灵敏度；然后以该灵敏度为公差等级选择依据，将RV减速器的各项加工误差表达为以公差等级IT5、IT6为基础产生的高斯分布随机数，通过随机抽样误差来分析各组误差样本下RV减速器不发生干涉的可靠度，以及传动误差分布情况。计算结果表明，针齿位置度误差、摆线轮齿距累积误差对传动误差的影响最大；渐开线齿轮偏心量误差和曲柄轴偏心量误差的影响较小；针齿半径误差的影响最小。将灵敏度较小的加工误差设为IT6，灵敏度较高的加工误差设为IT5，可得到所有加工误差均为IT5时的传动误差精度要求，其可靠度达98%且加工成本更低，从而为RV减速器加工精度选用和制造成本控制提供依据。

Abstract

Manufacturing error is the key factor affecting the transmission accuracy of RV reducer. On the basis of the gear tooth contact analysis method, a new gear tooth contact equation for two-stage transmission of involute gear and cycloidal pin gear is constructed to evaluate the influence mechanism of various manufacturing errors on transmission error of RV reducer considering tooth profile modification, machining error and assembly error. The prediction model of transmission error for cycloid pinwheel mechanism with different manufacturing errors is obtained to calculate the the sensitivities of various manufacturing errors for the transmission error. Sensitivities are also used as the basis for the selection of tolerance levels IT5 or IT6. According to different tolerance levels, manufacturing errors are expressed as Gaussian random numbers. Furthermore the reliability of the RV reducer without interference is analyzed and the distribution of transmission errors are obtained through random sampling errors under each group of error samples. The results show that the position error of the pin and the cumulative pitch error of the cycloid gear have the greatest influence on the transmission error, the eccentricity error of involute gear and crank shaft has little influence, and the influence of the pin radius error is the least. When the machining errors with lower sensitivity are set to IT6 and the ones with higher sensitivity are IT5, the transmission error accuracy requirements when all machining errors are IT5 can be obtained, the reliability is 98%, and the machining cost is lower. It can be as the basis for the manufacturing tolerance selection and the cost control of RV reducer.

导出引用

宿月文1，郭彩霞1，王参军1，朱爱斌2. 传动可靠度约束下RV减速器加工精度等级优选方法[J]. 振动与冲击, 2023, 42(2): 7-15

SU Yuewen1，GUO Caixia1，WANG Canjun1，ZHU Aibin2. Selection of optimal manufacuturing tollerance level for a RV reducer under the contrasint of transmission reliability[J]. Journal of Vibration and Shock, 2023, 42(2): 7-15

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