The paper designs a car transporter which is used to convey the passenger car .In order to meet the development requirements of Dongfeng Yueda Kia passenger car and reduces the transportation cost during the course of transportation, and enhance loading cars′capacity. The YD9160TCL type car transporter is designed to load 8 cars. Thus the design must satisfy the trailer′standards.
To design the structure, improve the transportation efficiency and realize a vehicle for multipurpose, we finally decide to adopt the program of " flexible frame "; referring to similar car transporter dimension, we calculate the major parameter of the semi-trailer. The topic studies the design proposal of the car transporter Vehicle-axles. In order to reduce the tire attrition and enhance the bearing capacity optimization, two axle one tires is determined. According to the requirement of axles and brake performance intensity and the braking quality request, the structure is calculated and exanimated; using the dependent suspension structure, the steel plate spring is also designed and calculated.