曲柄群驱动机构的误差计算与分析

The error calculating and analysis of crank-group driving mechanism

曲柄群驱动机构是一种新型的驱动机构,对精度要求很高.因此,对其误差进行计算、分析非常有必要.但由于其结构的复杂性,使得各个误差之间存在耦合,这为该机构的误差研究带来了较大的困难.本文对曲柄群驱动机构采用由单元到整体的方法,推导出了一种误差计算方法,对各个误差源做了分析,并指出了杆长误差、间隙等影响下的误差计算,以及曲柄输出误差计算.这为曲柄群驱动机构的精度实验研究提供了理论依据.

Crank group drive mechanism is a new drive mechanism,which requires high precision.It is very necessary to calculate and analysis the error of crank group drive mechanism.Due to the complexity structure of this mechanism,there is coupling between the various error,which makes it difficult to study the agency′s error.This paper adopted the approach from the unit to the whole to analysis the error of crank group drive mechanism.Derive an error calculating method of this mechanism,and various error sources were analyzed.Pointed out the calculation of error caused by the rod length error and the gap error,the calculate of crank output error.This paper provide a theoretical basis to experimental study of the accuracy of the institution.