Type Synthesis of 3-DOF Rotational Parallel Mechanisms With No Intersecting Axes

Author:

Chen Ziming1,Cao Wen-ao1,Huang Zhen1

Affiliation:

1. Robotics Research Center, Yanshan University, Qinhuangdao, Hebei, China

Abstract

Parallel mechanisms which can realize three rotational motions are very important in the parallel mechanism family. Not the same with the traditional spherical parallel mechanism, a new kind of 3-DOF (degree of freedom) rotational parallel mechanism with no intersecting axes (RPMNIA) are proposed in this paper. This kind of rotational parallel mechanisms have the advantages of easy manufacturing. A new approach using the screw theory and the subchain theory is proposed to design the branches with only one constraint force and some new one-force-branches are found. Using these new branches, a group of 3-DOF rotational parallel mechanisms without intersecting axes are synthesized.

Publisher

American Society of Mechanical Engineers

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