A new type of Stephenson-Ⅲ six-bar linkage for three-piece folding and hard-top convertible roof mechanism is presented.Utilizing vector loop equations and motion generated methods

the analytical expressions of dimension and position of barmembers are solved

and the design parameters are obtained sequentially.Three dimensional model of the mechanismis carried outby usingSolidWorks

and the rationality of the design is confirmed by Working model which is dynamic simulation software.There are some reference value for current design and manufacturing of hard-top convertible roof mechanismwith the research findings.