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在机床变速系统中,同一轴上的两个齿轮既是被动齿轮又是主动齿轮,具有这种特性的两个齿轮就称为双公用齿轮。如图1中间轴上两个齿轮即是。采用双公用齿轮的传动系统具有良好的技术经济效果。但由双公用齿轮组成的两个传动组,其传动比互相牵连,设计时需要掌握的参数和条件比较复杂。因此,能简明实用地求出双公用齿轮传动齿数方案的设计方法,至今还不够成熟。本文根据双公用齿轮传动中,A+C+E 最小及A+2C+E 最小,作为两种最佳的设计目标,通过数学分析的方法,建立数学模型,利用电子计算机辅助计算,将常用结构形式中上述两种最佳齿数方案全部
In the machine tool transmission system, the two gears on the same shaft are both driven and driving gears. Two gears with this characteristic are called double common gears. As shown in Figure 1 on the middle of the two gears that is. The transmission system with double common gear has good technical and economic effects. However, the two transmission groups consisting of double common gears have their transmission ratios implicated in each other, and the parameters and conditions to be grasped at the time of design are complicated. Therefore, it is not yet mature enough to concisely and practically find the design method of double common gear transmission gear number. Based on the minimum A + C + E and the minimum A + 2C + E in the double common gear transmission, the mathematical model is established by mathematical analysis as the two best design goals. By using computer aided calculation, the common structure Form the best of both programs above all the teeth