Trajectory Designing and Realizing for the Variable Structure Motorcycle Helmet
A new type of variable structure motorcycle helmet is proposed in this paper, in which that the helmet’s chin-guard can be transformed between the full-helmet status and the half-helmet status as needed. The helmet creatively adopts double movement nails and double track grooves to constraint the chin-guard movement according to the predetermined trajectory, and thus smoothly accomplishing the chin-guard’s lifting, climbing, passing zenith, falling and closing in the helmet shell. The paper introduces the chin-guard’s trajectory planning principles, realizing methods and designing steps, and then gives a design case for the constraint slot tracks in detail. The results show that the new type helmet can reliably realize helmet structure conversion between full-helmet and half-helmet and fully meets the design requirements.
Liangchi Zhang, Chunliang Zhang and Zichen Chen
A. N. Geng et al., "Trajectory Designing and Realizing for the Variable Structure Motorcycle Helmet", Advanced Materials Research, Vols. 328-330, pp. 633-637, 2011