Dynamic modelling method of parallel indexing cam mechanism is presented based on multi-body system dynamics according to the analysis of mechanism feature.Rigid-flexible coupled dynamic model is established by means of ADAMS

Pro/E and ANSYS.Dynamic simulation is carried out

and according to the analysis result of simulation

the conclusion that cosine motion commonly used in engineering is unfit for using in high speed

heavy load and precision transmission cases is got.The effects of load inertia

input speed

and stroke angle on system output response are detailedly illustrated.