The clearance between kinematic pairs in the crank-group driving mechanism is studied.Crank-group driving mechanism is a new type of transmission mechanism

and there must be clearance between kinematic pairs to guarantee the machining precision of the mechanism

to make the mechanism to operate normally and prevent the generation of assembly stress.But the existence of clearance may have much adverse effects on the mechanism

then it is a necessary to find out some ways to decline its bad effects.In the practical application

can choose appropriate support combination type of shafts according to requirements

make reasonable design and configuration on the rotational pair

improve the friction and lubrication condition

and select reasonable kinematic pair clearance through calculation

and by the comprehensive use of various above methods to reduce the influence of kinematic pair clearance.