1画出轴的受力简图、计算齿轮的受力大小 e=2t/d F=E Igan/coS B Fa=Tgb × H1 1 Ft = 2T / d Fr = Ft t gn / cos  Fa = Ft tg 1.画出轴的受力简图、计算齿轮的受力大小