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Mechanical Sciences An open-access journal for theoretical and applied mechanics
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Articles | Volume 8, issue 1
Mech. Sci., 8, 1–9, 2017
https://doi.org/10.5194/ms-8-1-2017
Mech. Sci., 8, 1–9, 2017
https://doi.org/10.5194/ms-8-1-2017

Research article 10 Jan 2017

Research article | 10 Jan 2017

Design and analysis of symmetric and compact 2R1T (in-plane 3-DOC) flexure parallel mechanisms

Guangbo Hao Guangbo Hao
  • School of Engineering, University College Cork, Cork, Ireland

Abstract. Symmetry is very necessary in flexure mechanisms, which can eliminate parasitic motions, avoid buckling, and minimize thermal and manufacturing sensitivity. This paper proposes two symmetric and compact flexure designs, in-plane 3-DOC (degree of constraint) mechanisms, which are composed of 4 and 6 identical wire beams, respectively. Compared to traditional leaf-beam-based designs, the two present designs have lower stiffness in the primary motion directions, and have smaller stiffness reduction in the parasitic directions. Analytical modelling is conducted to derive the symbolic compliance equations, enabling quick analysis and comparisons of compliances of the two mechanisms. A prototype has been tested statically to compare with analytical models.

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