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Foldable polyhedral structure

A technology of polyhedron structure and symmetrical plane, which is applied in building construction, aerospace vehicles, transportation and packaging, etc., can solve the problems of difficult repeated operation, unfavorable deformation process, and foldable polyhedron with a fold-expand ratio of less than 1.1, etc., to achieve Reduce the instability of installation and manipulation, facilitate transportation and storage, and facilitate installation and use

Inactive Publication Date: 2016-04-27
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing spatially expandable structures mainly involve folding on planes or curved surfaces, such as solar panels and satellite antennas, while folding mechanisms involving volume are mainly obtained by non-rigid deformation. The deformation process is not conducive to control and is not easy to repeat. , the existing expandable polyhedrons that adopt rigid deformation are either complex in structure, such as the expandable polyhedron structure driven by a regular polygon mechanism proposed by C.M.Gosselin and D.Gagnon-Lachance in 2006; or they cannot be completely folded, such as Kiperand The folding ratio of the foldable polyhedron proposed in 2009 is less than 1.1

Method used

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Embodiment approach

[0051] Such as figure 1 As shown, this embodiment provides a first implementation of a foldable polyhedron structure, including eight folding units, respectively called the first folding unit T1, the second folding unit T2, the third folding unit T3, the fourth folding unit Folding unit T4, fifth folding unit T5, sixth folding unit T6, seventh folding unit T7, eighth folding unit T8; the structures of the eight folding units are all identical and have a triangular outline, and the three vertices of the triangular outline are respectively As the three connection positions of each folding unit, they are respectively referred to as the first connection position, the second connection position and the third connection position of each folding unit.

[0052] combine Figure 2-1 to Figure 2-8 As shown, the second connection position (V12) of the first folding unit T1 is connected to the first connection position (V12) of the second folding unit T2 through the first rotating pair H1...

Embodiment 2

[0065] Such as Figure 6 As shown, this embodiment provides a second embodiment of a foldable polyhedron structure, which includes eight folding units and four sets of connecting mechanisms. The eight folding units are called the first folding unit T1, the second folding unit T2, the third folding unit T3, the fourth folding unit T4, the fifth folding unit T5, the sixth folding unit T6, the seventh folding unit T7, the Eight folding units T8; the structures of the eight folding units are all identical and have a triangular outline, and the three vertices of the triangular outline are respectively used as the three connection positions of each folding unit, which are respectively called the first connection positions of each folding unit , the second connection position and the third connection position.

[0066] combine Figure 7-1 to Figure 7-8 As shown, the second connection position (V12) of the first folding unit T1 is connected to the first connection position (V12) of ...

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Abstract

The invention discloses a foldable polyhedral structure with a single degree of freedom and a large folding-and-unfolding ratio, comprising eight folding units and three orthogonal symmetric planes, wherein the eight folding units are divided into two sets, and each set comprises four folding units; the four folding units in each set are connected end to end through revolute pairs; four pairs of folding units in the two sets are connected in a one-to-one correspondence mode through ball pairs or link mechanisms; and the folding units and kinematic pairs meet a series of symmetric relations and constraint conditions relative to the three symmetric planes, thereby constructing a tetrakaidecahedron structure which can be folded into an octahedral structure. The foldable polyhedral structure disclosed by the invention can be in two stable states, namely a folded state and an unfolded state; when the foldable polyhedral structure is folded, the volume is relatively small, so that the foldable polyhedral structure is convenient to transmit or transport; and when the foldable polyhedral structure is unfolded, the working space is relatively large. The whole structure only has one degree of freedom, has the advantages of simple production and processing, convenient motion control, high reliability and the like, and has important significance and wide application prospects in many fields, such as aerospace and civil engineering.

Description

technical field [0001] The invention relates to a foldable polyhedron structure with a single degree of freedom and a large fold-to-expand ratio, and specifically relates to a transformation between a tetradecahedron and an octahedron realized by a single drive. Background technique [0002] Due to its good symmetry, polyhedral structures are widely used in aerospace, architectural structures, artworks and daily life. However, due to their large size and unfavorable transportation, polyhedral structures are often only used in fixed occasions. Cube small satellites, which were rated as one of the top ten scientific and technological breakthroughs in 2014 by the SCIENCE journal, are typical representatives of the aerospace field in pursuit of miniaturization and low-cost launch. However, the shortcoming of its small working space in the orbital state also restricts its further application. [0003] The space foldable structure is a new type of structure born with the developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/22B64G1/44E04B1/344
CPCE04B1/344E04B1/3447B64G1/222B64G1/44
Inventor 陈焱杨富富李建民马家耀
Owner TIANJIN UNIV
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