The force applied on front-wheel is discusced through an example in which tractor steering knuckle kingpin is tendency inside, and the returning positive moment acquired by front-wheel ground counteraction is also analysed.

• 摘要从车辆前轮的受力出发，以拖拉机转向节立轴内倾时为例，分析了前轮接地反力作用所产生的回正力矩。