A large number of independent and interacting factors affect seating comfort such as seat shape, stability, lumbar support and seat height. Although many subjective comfort studies have been conducted, few of them considered seating comfort from its subassembly level. This paper analyzed the automotive seat cushion designed with geared four-bar linkage for the seat height adjustment. The operat...

We present an additive approach for the inverse design of kirigami-based mechanical metamaterials by focusing on empty (negative) spaces instead solid tiles. By considering each negative space as a four-bar linkage, we identify simple recursive relationship between adjacent linkages, yielding efficient method creating kirigami patterns. This allows us to solve problem using elementary linear al...

Abstract With the gradual development of lift device to a simple and efficient direction, drooped spoiler has become an emerging device. The can improve aerodynamic performance wing by reducing air flow separation increase coefficient, which requires deflect certain angle following downward deflection flap. Aiming at this requirement, paper proposes design method follower mechanism based on rel...

We study the transmission by two consecutive four-bar linkages with aligned frame links. The paper focusses on so-called “reducible” examples on the sphere where the 4-4-correspondance between the input angle of the first four-bar and the output-angle of the second one splits. Also the question is discussed whether the components can equal the transmission of a single four-bar. A new family of ...

The synthesis of four-bar mechanisms is well understood, classical design problem. The original systematic work in this field began in the late 1800’s and continues to be an active area of research. Limitations to the classical theory of four-bar synthesis potentially limit its application to certain real-world problems by virtue of the small number of precision points and unspecified order. Th...

At present, the research objects of rigid-body guidance synthesis are mostly limited to pure linkages, and there is little on combined mechanisms gears or cams linkages. In order expand improve kinematic mapping theory, this paper proposes a method noncircular gear-five-bar mechanisms. A mechanism can be regarded as combination 2R (two revolute joints) open chain, 3R (three chain pair gears. Fi...

In this paper, we present a novel web-based computer-aided modeling and manufacturing software tool for spherical mechanisms. Our purpose is to facilitate the analysis, dynamic simulation, and manufacture of one degree of freedom spherical four-bar mechanisms. First, a brief review of some of the current computer-aided design software for spherical four-bar mechanisms is presented. These softwa...