Internally-folded retractable roof structure

Abstract

The invention discloses an internally-folded retractable roof structure, comprising an internally-folded connecting rod mechanism and an external annular connecting rod mechanism. The internally-folded connecting rod mechanism is formed by n diamond four-connecting-rod mechanisms end to end through two nodes on a diagonal line. The annular connecting rod mechanism comprises an n-gonn rod formed by connecting n straight rods end to end; a connecting rod mechanism unit is arranged on each straight rod; each connecting rod mechanism unit consists of an internally-arranged parallelogram mechanism and an externally-arranged parallelogram mechanism; and the both ends of the n straight rods are fixedly connected with a support. The internally-folded retractable roof structure provided by the invention has the beneficial effects that the rigidity of a structure on the connection part with the support is increased by arranging a single-freedom degree annular connecting rod mechanism on the n-edge-shaped rod, so as to overcome the defects of poor stress property and poor rigidity of the traditional folding grid structure; furthermore, the quantity of driving devices is decreased due to a single-freedom degree property of the external annular connecting rod mechanism; and additionally, the connecting rod mechanism formed by connecting the diamond four-connecting-rod mechanisms end to end is internally used, so as to expand an opening range of a roof.

Description

technical field [0001] The invention relates to a roof structure, in particular to a foldable roof structure. Background technique [0002] The folded grid structure, mainly the folded net frame and the folded reticulated shell structure, has the advantages of short construction period, easy relocation and reusability, and has aroused great interest of modern architects. Abroad research results on folded grid structure are quite rich, and there are engineering examples of application. However, it is rarely used in foldable roofs. The main reasons are as follows: (1) The node design of the folded grid structure is generally more complicated. At present, there is still a lack of simple, practical, and low-cost node designs suitable for engineering applications; ( 2) In addition to the axial force, the members of the folded grid structure are subject to a certain bending moment, the mechanical performance is not good, and the cost is high; (3) the stiffness of the folded grid ...

AI Technical Summary

Problems solved by technology

For the former, the structural form of the retractable roof building is relatively simple; for the latter, its design and construction are relatively complicated, and the cost is extremely high. Generally, it can only be used in significant sports venues, and it cannot meet the needs of some small and medium-sized span buildings. Requirements for opening and closing functions

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