在我国,手扶拖拉机过去不作动力输出性能试验,只作发动机台架试验。这是因为:手扶拖拉机结构简单,拆装方便;国内生产的手扶拖拉机大部分没有动力输出轴机构(表1)。但是,手扶拖拉机不作动力输 In our country, the walking tractor used to do no power output performance test in the past, only for the engine bench test. This is because: walking tractor structure is simple, easy disassembly; most of the domestic production of walking tractors without power output shaft mechanism (Table 1). However, walking tractors do not power down