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农业机械上有许多齿轮,齿轮的模数是齿轮的重要参数之一。模数是怎么定出来的呢?它是为了简化齿轮的计算,人为地定出来的。如图所示,在直径为d_分的分度圆圆周上均匀地分布着Z个齿,相邻两齿同一侧齿面之间的弧长称为周节t。那么分度圆的周长不但可以用πd_分表示,也可用tZ表示,亦即πd_分=tZ,所以d_分=Z(t/π)。由于π是个无理数,不能
There are many agricultural machinery gear, gear modulus is one of the important parameters of the gear. How to determine the modulus? It is to simplify the calculation of gears, artificially set out. As shown in the figure, there are Z teeth uniformly distributed on the circumference of the index circle with the diameter of d_, and the arc length between the tooth flanks of the adjacent two adjacent teeth is called the periphery t. Then the circumference of the indexing circle can be expressed not only by πd_ points, but also by tZ, that is, πd_point = tZ, so d_point = Z (t / π). Since π is an irrational number, it can not