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角修正变位齿轮大小两个轮的变位距的方向有的相同(全为正的)有的相反(一正一负),除个别情况外,一般的变位距绝对值是不相等的。大小轮节圆齿厚相加不等于周节;在啮合时大小轮的节圆不相切;两轮中心距不等于两轮节圆半径的和。我们知道,第四章中公式(27)(28)是在大小轮节圆齿厚相加等于周节的基础上推导出来的,因而不能用来测算角修正变位齿轮的压力角,角修正变位齿轮压力角的测算有它自己的公式。
Correct the position of the gear change The two wheels change the direction of the same (all positive) some the opposite (a positive and negative), except in some cases, the general displacement of the absolute value is not equal . The sum of the circular tooth thickness of the size wheel is not equal to that of the week. The pitch circle of the size wheel is not tangent at the time of meshing. The center distance of the two wheels is not equal to the sum of the radii of two pitch circles. We know that the formula (27) and (28) in Chapter 4 are derived on the basis of the sum of the circular tooth thicknesses of the wheel and the wheel, which can not be used to calculate the pressure angle and angular correction Displacement gear pressure angle has its own formula.