Chapter 21 Axle and Wheel 月濟大学 TONGII UNIVERSTTY Steering axle's structure Axle hub Kingpin >Front member:its section uses I-beam or hollow circular beam in order to bear bending moment (also bears Bushing bending and torsion when braking). Thrust bearing >Kingpin:the component that connect front axle and knuckle,it is fixed in the pin hole Front of the front axle. member Steering knuckleChapter 21 Axle and Wheel Front member：its section uses I-beam or hollow circular beam in order to bear bending moment (also bears bending and torsion when braking). Kingpin：the component that connect front axle and knuckle, it is fixed in the pin hole of the front axle. Steering axle’s structure Front member Steering knuckle Kingpin Axle hub Bushing Thrust bearing