一、传动链误差传递原理　　　　图1所示是一条四轴七轮传动链,若主动轮1　存在角度误差值,化为线值误差为。设传至轮2、轮3、轮4、轮5、轮6和轮7的角度误差值分别为和,则相应有:;;;;和的线值误差关系(式中:　r1至r　分别为齿轮1至齿轮7的分圆半径)。　　　　从图1所示的误差传 First, the transmission chain error transmission principle shown in Figure 1 is a four-axis seven-wheel drive chain, if there is a proactive wheel angle error value, into the line error. Assuming that the angle error values ​​passed to wheel 2, wheel 3, wheel 4, wheel 5, wheel 6 and wheel 7 are respectively sum, then there is the relationship of the error of the line value (where r1 to r respectively The gear 1 to gear 7 rounding radius). From the error shown in Figure 1 pass