Research on the Motion Accuracy Reliability of Rigid-Flexible Coupling Mechanism with Lubrication Clearances

In order to explore the effect of lubrication clearances and flexible components on motion accuracy reliability of mechanism, this paper takes the six-link mechanism as research target, the mathematical model of lubrication clearance is established, the flexible rod element model is built by absolute node coordinate formulation (ANCF) method. A method for the motion accuracy reliability of mechanism is derived based on Stress-Strength interference theory, taking into account random parameters such as dynamic viscosity, cross-sectional area, Young's modulus and clearance values. The influence of driving speed on motion accuracy reliability of mechanism is analyzed. The results indicate that as the driving speed increases, the motion accuracy reliability of mechanism continuously decreases.