大学 第5章轮系 otte UNiersity 定轴轮系的传动比计算 15 2 23 2 O 2 4 C 4 34 45 3 4 2 h12l23‘l3y4‘l45 4 2-3-4-5 1-2 2 3-4第 5 章 轮系 1 2' 3' 4 2 3 4 5 51 15 z z z z z z z z i = =  1 5 51 54 43 32 21 1 2 2'3 3 4 4 5 i i i i =    = = i       ? 51 15 = =  i 12 21 12 zz i = =  45 54 4 5 34 43 3 4 zz i zz i = = = =     2' 3 32 2'3 zz i = =  定轴轮系的传动比计算