Design of a rectilinear suspension with automatic length compensation branches
by Jing-Shan Zhao; Xiang Liu; Zhi-Jing Feng
International Journal of Vehicle Design (IJVD), Vol. 66, No. 1, 2014

Abstract: This paper proposes an independent suspension whose alignment parameters are theoretically invariable during jounce and rebound. Each kinematic chain of the suspension consists of a 3-RRR linkage that could automatically compensate for the axial distance change. The motions of the 3-RRR linkages and the knuckle are investigated from the viewpoints of screw theory and geometry. The equivalent torsional stiffness, bending stiffness and shear stiffness of a 3-RRR linkage are investigated to demonstrate the feasibility of engineering applications. Research results show that this complex linkage has better mechanical properties than those of a prismatic joint when used as a passive connection. As a result, the 3-RRR linkage has accurate alignment ability on the one hand and could keep the compact space in design while having the required strength and compliance on the other hand.

Online publication date: Thu, 30-Oct-2014

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