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和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。
Manufacturing error is the key factor affecting the transmission accuracy of a RV reducer.On the basis of the gear tooth contact analysis method,the new gear tooth contact equations for a two-stage transmission consisting of an involute gear pair and a cycloidal pin gear pair were constructed to evaluate the influences of various manufacturing errors on the transmission error of the RV reducer such as the influences of the tooth profile modification,machining error and assembly error.The prediction model of the transmission error for the cycloidal pin wheel mechanism with different manufacturing errors was obtained to calculate the sensitivities of various manufacturing errors to the transmission error.Sensitivities were also used as the basis for the selection of tolerance levels IT5 or IT6.According to different tolerance levels,manufacturing errors were expressed as Gaussian random numbers.Furthermore,through the processing of random sampling errors,for each group of error samples,the reliability of the RV reducer without interference was analyzed and the distribution of transmission errors was obtained.The results show that the position error of the pin and the cumulative pitch error of the cycloidal gear have the greatest influence on the transmission error,the eccentricity error of the involute gear and crank shaft has little influence,and the influence of the pin radius error is the least.Then,the machining errors with lower sensitivity are set to IT6 and the ones with higher sensitivity are set to 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 utilized as the basis for the manufacturing tolerance level selection and the cost control of RV reducers.
作者
宿月文
郭彩霞
王参军
朱爱斌
SU Yuewen;GUO Caixia;WANG Canjun;ZHU Aibin(Shaanxi Key Laboratory of Advanced Manufacturing and Evaluation of Robot Key Components,Baoji University of Arts and Sciences,Baoji 721016,China;Shaanxi Key Laboratory of Intelligent Robots,Xi*an Jiaotong University,Xi'an 710049,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第2期7-15,共9页
Journal of Vibration and Shock
基金
陕西省2021年重点研发计划(2021GY-326)。
关键词
RV减速器
加工误差
传动误差
轮齿接触分析
RV reducer
manufacturing error
transmission error
tooth contact analysis
