The Metamorphic Bennett Linkages

10.6567/IFToMM.14TH.WC.OS8.005

Chung-Ching Lee；Jacques M. Hervé

Metamorphic Bennett linkage ； Bennett mechanism ； Discontinuous mobility ； Handedness ； Trifurcation

Proceedings of the 14th IFToMM World Congress

14th-2（2015 / 10 / 27）

394 - 399

英文

Based on the four distinct types of Bennett mechanisms, this paper proposes a novel family of discontinuously movable mechanisms with two postures of trifurcation by adding two coaxial revolute pairs along their opposite bars. These mechanisms are called metamorphic Bennett linkages (MetaMBLs) for brevity. They are all special six-revolute linkages with the discontinuous mobility characterized by three working modes: the 1-DoF coaxial revolute rotations, Bennett motion with the same handedness of the four links and other Bennett motion with the alternate link handedness. Two special cases, rectangular and equilateral MetaMBLs, are studied, too. The proposed MetaMBLs are further animated for the verification of the metamorphic postures.