A Kineto-elastodynamic Analysis of Planar Link Mechanisms with Consideration of Bearing Clearances

Abstract

In this paper, a theoretical method to analyzed dynamically planar link mechanisms with consideration of bearing clearances and link elasticities has been proposed. Applying the method to a planar four-bar mechanism having an elastic coupler link whose pairs have clearances, the dynamic characteristics of the mechanism have been analyzed with an experimental discussion, revealing the influences of the clearances of pairs and the flexural rigidities of elastic links upon the relative motions between pairing elements, the forces acting at pairs with clearances and the transverse vibration of the elastic link. Moreover, the dynamic characteristics have been improved by increasing the damping ratio of the elastic link.