Abstract
A novel type synthesis method for a class of spatial multi-loop coupled mechanisms with translational degrees of freedom is proposed in the paper. The novel class of spatial multi-loop coupled mechanisms has a stable topology layout which consists of three branches and three coupled chains. The basic idea of the new structural synthesis method lies at replacing the inputs of one mechanism by the outputs of another, thereby combining several mechanisms, where the topology split method for the topological layout and corresponding degree of freedom splitting principle are provided. The synthesis of the target mechanism is transformed into synthesis of corresponding serial and parallel mechanisms thereby, and a class of spatial multi-loop coupled mechanisms is synthesized. To validate the new synthesis method and to present a theoretical basis for future application, kinematic analysis of a single translational mobility (1T) spatial multi-loop coupled mechanism and a symmetrical two translational degrees of freedom (2T) spatial multi-loop coupled mechanism is performed. This article enriches the family of the spatial mechanisms for further instructing the study of spatial multi-loop coupled mechanisms.
Highlights
Type synthesis is the core of mechanical design
A type synthesis method for this class of SMCMs is presented, which mainly based on the idea of replacing the inputs of one mechanism with the outputs of another is used for synthesis of target mechanism
A novel method is proposed for type synthesis of translational SMCMs with three branches and three coupled chains
Summary
Type synthesis is the core of mechanical design. Over the past few decades, a variety of new mechanisms has been proposed and successfully applied in industry and elsewhere.[1,2,3] many effective type synthesis theories have been proposed for creative design. A type synthesis method for this class of SMCMs is presented, which mainly based on the idea of replacing the inputs of one mechanism with the outputs of another is used for synthesis of target mechanism Following this basic idea and considering a SMCM as a combination of several mechanisms, a topology splitting method and a DoF splitting principle are proposed, which provides an approach for determining the target mechanism module and target DoF in each level of separation. The target mechanism is obtained by type synthesizing and combining the serial and parallel mechanisms
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