Design of Two Foldable Mechanisms Without Parasitic Motion

Abstract

This letter presents design and analysis of two new foldable mechanisms without parasitic motion. These two PU-equivalent mechanisms have no parallel singularities in the feasible workspace excluding the boundary together with the simple or unique closed-form forward kinematic solutions. Kinematic performances are evaluated with respect to motion/force transmission property. Both of them were applied to flat panel TV mounting due to their excellent dynamic force transmission characteristics. A commercially available multibody dynamic simulator was employed to verify the simulation result of the actuator force. Finally, two prototypes are designed through 3-D printer to verify the motion property.