Taking the component of the crank and connecting rod mechanism with revolute clearance joint in the sheet transfer mechanism of print ing machine as the research object

on the basis of the vector clearance and the penetration depth of contact

the discriminated condition of contact with separat ion is improved considering the two kinds of mot ion state of clearance joint.The contact and separation dynamics models of a crank and connect ing rod mechanism with clearance joint are established respectively and numerical solving is conducted.Then with the analysis of the influence of clearance on the dynamic characteristics of crank and connecting rod mechanism

the reasonable contact clearance size at working speed are advised in the thesis.Key words Clearance Contact and separation Dynamic characteristic Sheet transfer mechanism