• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2019, Vol. 55 ›› Issue (15): 154-162.doi: 10.3901/JME.2019.15.154

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Type Synthesis of Multi-loop Mechanisms with Three Translational and One Rotational Displacement Parameters Based on Generalized Link Group

ZHANG Xing1, MU Dejun2,3, ZHANG Yitong2,3, LI Weiqi2,3, WANG Hongrui1   

  1. 1. Key Lab of Industrial Computer Control Engineering of Hebei Province, Yanshan University, Qinhuangdao 066004;
    2. Key Lab of Parallel Robot and Mechatronic System, Yanshan University, Qinhuangdao 066004;
    3. Key Lab of Advanced Forging & Stamping Technology and Science of Ministry of National Education, Yanshan University, Qinhuangdao 066004
  • Received:2018-08-28 Revised:2018-11-23 Online:2019-08-05 Published:2019-08-05

Abstract: A new method to synthesize multi-loop mechanisms with three translational and one rotational displacement parameters is proposed in this paper. This method is based on generalized link group. It extends the unified link groups in plane and space by using kinematic links as a generalized link group added one-by-one to the output link. The internal relation on the change in the degree of freedom (DOF) and displacement parameters of the output link after adding a 0-DOF generalized link group are analyzed. The link groups with three translational and one rotational displacement parameters are synthesized, and its intersection operation rules are established. The 2-, 3-, and 4-DOF single-loop mechanisms are obtained by combining two generalized link groups. The dual-loop mechanisms are synthesized by adding a 0-DOF generalized link group. The multi-loop mechanisms are obtained by adding 0-DOF generalized link groups. Some novel mechanisms are synthesized to illustrate the effectiveness and comprehensiveness of the proposed method.

Key words: displacement parameter, generalized link group, multi-loop, three translational and one rotational, type synthesis

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