A new type of tractor shuttle shift with immovable parallel axes gear train structure of parallel power - flow was described . it specifyies on its structure and design method 摘要介紹了一種采用并聯(lián)功率流定軸輪系結(jié)構(gòu)的拖拉機新型逆行器的設計開發(fā),著重敘述了該型逆行器的結(jié)構(gòu)特點和設計方法。