Abstract: According to the interrelation characteristic of the structure size of the crane arms, the size actuation method is used, the parameterized design system of truck crane arms is developed based on the re-developing of the 3D software SolidWorks with VB language. 3D model of the arms of truck crane can be quickly structured through inputing the cross-sectional size of the basic jib and the number of booms of the crane in the system, it accomplishes the automation and serialization of designing of the arms, and hence reduces the development cycle, and enhances observably the efficiency and quality in truck crane design.

Key words: parameterized design system, size actuation, crane arm, 3D model