Foldable single-degree-of-freedom polygonal prism structure and working method thereof

Abstract

The present invention relates to a foldable single-degree-of-freedom polygonal prism structure, comprising two symmetrical side polygonal modules and two symmetrical bottom polygonal modules; the side polygonal modules each comprise two side polygonal plates of different sizes connected by a rotating pair, and the adjacent side polygonal plates of the left and right side polygonal modules are further connected by a rotating pair; the bottom polygonal modules each comprise two bottom polygonal components arranged symmetrically, each bottom polygonal component comprises two bottom polygonal plates of different sizes connected by a rotating pair, the bottom polygonal plates are connected to the same bottom side of the corresponding side polygonal plates by a rotating pair, and an opening and closing seam is between the two bottom polygonal components located at the same bottom. The entire structure is simple in construction, easy to manufacture, flexible and changeable, and has the advantages of high rigidity and good stability. It has important significance and broad application prospects in aerospace and civil engineering.

Description

Technical Field

[0001] The invention relates to a foldable single-degree-of-freedom polygonal prism structure and a working method thereof. Background Art

[0002] The expandable structure can adapt to a variety of working conditions by changing its own shape. It has the advantages of large folding and unfolding ratio, easy transportation and storage, etc. It not only has broad application prospects in aerospace, civil construction, military engineering and other fields, but also has many applications in life and rescue.

[0003] Polyhedral structures are widely used due to their good symmetry, but existing polyhedral structures are either large in size when empty and not convenient for transportation, such as containers, or have complex folding processes, many degrees of freedom, and are difficult to control, such as foldable tents. These characteristics greatly limit the application of polyhedral structures. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a foldable single-degree-of-freedom polygonal prism structure and a working method thereof.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a foldable single-degree-of-freedom polygonal prism structure, comprising two left-right symmetrical side polygonal modules and two top-bottom symmetrical bottom polygonal modules;

[0006] The side polygonal modules each include two side polygonal plates of different sizes connected by a rotating pair, and the adjacent side polygonal plates of the left and right side polygonal modules are further connected by a rotating pair;

[0007] The bottom polygon modules include two bottom polygon components that are symmetrically arranged on the left and right. Each bottom polygon component includes two bottom polygon plates of different sizes connected by a rotating pair. The bottom polygon plates are connected to the same bottom side of the corresponding side polygon plate through a rotating pair. There is an opening and closing seam between the two bottom polygon components located on the same bottom.

[0008] Preferably, each side polygonal module is composed of two side polygonal plates, namely a stepped side polygonal plate and a flat side polygonal plate, wherein the stepped side polygonal plates have three surfaces, namely inner, middle and outer, and the flat side polygonal plates have two surfaces, namely inner and outer; each side polygonal plate has four connecting edges, which are distributed on the two long sides and two end sides of the side polygonal plate, the two long side connecting edges are parallel to each other, the two end side connecting edges are parallel to each other, and the distances between the two long side connecting edges of all side polygonal plates are equal, and the two long side connecting edges and the two end side connecting edges are perpendicular to each other.

[0009] Preferably, in the stepped side polygonal plate: the two long sides and the end side connecting edges close to the flat side polygonal plate are all on the middle layer surface of the plate, and the end side connecting edges away from the flat side polygonal plate are all on the inner layer surface of the plate; in the flat side polygonal plate: the two long sides and the end side connecting edges close to the stepped side polygonal plate are all on the inner layer surface of the plate, and the end side connecting edges away from the stepped side polygonal plate are all on the outer layer surface of the plate; the adjacent end side connecting edges of the stepped side polygonal plate and the flat side polygonal plate of the same side polygonal module are connected to each other through a rotating pair; the adjacent end side connecting edges of two stepped side polygonal plates of different side polygonal modules are connected to each other through a rotating pair, and the adjacent end side connecting edges of the flat side polygonal plates of different side polygonal modules are connected to each other through a rotating pair, so that the two side polygonal modules enclose the side surface of a regular prism.

[0010] Preferably, each bottom polygonal component is composed of two bottom polygonal plates, namely a front bottom polygonal plate and a rear bottom polygonal plate; each bottom polygonal plate has two connecting edges, namely a side connecting edge and a bottom connecting edge, which are distributed on the inner surface of the plate, and the angles formed by the two connecting edges of all bottom polygonal plates are equal; the bottom connecting edges of the front bottom polygonal plate and the rear bottom polygonal plate of the same bottom polygonal component are interconnected by a rotating pair, so that the side connecting lines of the four bottom polygonal plates of the same bottom polygonal module are always on the same plane; the side connecting edges of the front bottom polygonal plate are all connected to the corresponding long side connecting edges of the stepped side polygonal plate on the same side through a rotating pair, and the side connecting edges of the rear bottom polygonal plate are all connected to the corresponding long side connecting edges of the flat-plate side polygonal plate on the same side through a rotating pair.

[0011] Preferably, the secondary axis of rotation between the front bottom polygonal plate and the rear bottom polygonal plate connecting the same bottom polygonal assembly, the secondary axis of rotation between the front bottom polygonal plate and the stepped side polygonal plate connected thereto, and the secondary axis of rotation between the rear bottom polygonal plate and the flat side polygonal plate connected thereto always intersect at one point during the folding process, and the point converges at the upper or lower end of the secondary axis of rotation of the above-mentioned two side polygonal plates.

[0012] Preferably, when the same bottom polygonal module is fully unfolded, the four bottom polygonal plates form a kite shape or an isosceles triangle.

[0013] Preferably, the revolving pair is one of a hinge, a hinge and a bearing.

[0014] A working method of a foldable single-degree-of-freedom polygonal prism structure is carried out in the following steps:

[0015] (1) After folding: There is no interference between the middle surface of the stepped side polygonal plate and the inner surface of the flat side polygonal plate. When the distance between the inner surface of the stepped side polygonal plate and the middle surface is equal to the thickness of the flat side polygonal plate, after the prism is fully folded, the middle surface of the stepped side polygonal plate of the polygonal prism and the inner surface of the flat side polygonal plate are completely fitted together, forming a thick polygonal plate after being fully folded.

[0016] (2) After unfolding: After being fully unfolded, the polygonal prism forms a completely closed polygonal prism with a self-locking function.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the polygonal prism structure of the present invention has expandable performance, has a single degree of freedom during the folding and unfolding process, is in a flat plate state when fully folded, and is convenient for processing, installation, storage and transportation. When fully unfolded, it is a fully closed polygonal prism that can be self-locked, can withstand large external forces, and can be used as a rescue tent or storage box. The entire structure is simple in construction, easy to make, flexible and changeable, and has the advantages of high rigidity and good stability. It has important significance and broad application prospects in aerospace and civil engineering.

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the stepped side polygonal plate structure of an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the flat side polygonal plate structure of an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the front bottom polygonal plate structure of an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the rear bottom polygonal plate of an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the unfolded state of the foldable triangular prism according to an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the intermediate state of the foldable triangular prism according to an embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of the folded state of the foldable triangular prism according to an embodiment of the present invention.

[0026] Figure 8 It is a schematic diagram of the unfolded state of the foldable quadrangular prism according to an embodiment of the present invention.

[0027] Fig. 9It is a schematic diagram of the intermediate state of the foldable quadrangular prism according to an embodiment of the present invention.

[0028] Fig.10 It is a schematic diagram of the folded state of the foldable quadrangular prism according to an embodiment of the present invention.

[0029] Description of the numbers in the figure:

[0030] C1-stepped side polygonal plate, C2-flat side polygonal plate;

[0031] D1-front bottom polygonal plate, D2-rear bottom polygonal plate;

[0032] R-rotation pair;

[0033] A1A2-end side connecting edge A1A2, A3A4-long side connecting edge A3A4, A4A5-end side connecting edge A4A5, A5A6-long side connecting edge A5A6, A1A13-wide side line A1A13, A4A14-wide side line A4A14, A7A8-end side connecting edge A7A8, A8A10-long side connecting edge A8A10, A7A9-long side connecting edge A7A9, A11A12-end side connecting edge A11A12;

[0034] B1B2 - side connecting edge B1B2, B2B3 - bottom connecting edge B2B3, B4B5 - bottom connecting edge B4B5, B5B6 - side connecting edge B5B6. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] like Figures 1 to 10 As shown, this embodiment provides a foldable single-degree-of-freedom polygonal prism structure, including two left-right symmetrical side polygonal modules and two top-bottom symmetrical bottom polygonal modules, forming the upper bottom surface and the lower bottom surface of the prism;

[0039] The side polygonal modules each include two side polygonal plates of different sizes connected by a rotating pair, and the adjacent side polygonal plates of the left and right side polygonal modules are further connected by a rotating pair;

[0040] The bottom polygon modules include two bottom polygon components that are symmetrically arranged on the left and right. Each bottom polygon component includes two bottom polygon plates of different sizes connected by a rotating pair. The bottom polygon plates are connected to the same bottom side of the corresponding side polygon plate through a rotating pair. There is an opening and closing seam between the two bottom polygon components located on the same bottom.

[0041] In an embodiment of the present invention, each side polygonal module is composed of two side polygonal plates, namely a stepped side polygonal plate and a flat side polygonal plate, wherein the stepped side polygonal plates have three layers of surfaces, namely, inner, middle and outer layers, and the flat side polygonal plates have two layers of surfaces, namely, inner and outer layers; each side polygonal plate has four connecting edges, which are distributed on the two long sides and two end sides of the side polygonal plate, the two long side connecting edges are parallel to each other, the two end side connecting edges are parallel to each other, and the distances between the two long side connecting edges of all side polygonal plates are equal, and the two long side connecting edges and the two end side connecting edges are perpendicular to each other.

[0042] In an embodiment of the present invention, in the stepped side polygonal plate: the two long sides and the end side connecting edges close to the flat side polygonal plate are all on the middle layer surface of the plate, and the end side connecting edges away from the flat side polygonal plate are all on the inner layer surface of the plate; in the flat side polygonal plate: the two long sides and the end side connecting edges close to the stepped side polygonal plate are all on the inner layer surface of the plate, and the end side connecting edges away from the stepped side polygonal plate are all on the outer layer surface of the plate; the adjacent end side connecting edges of the stepped side polygonal plate and the flat side polygonal plate of the same side polygonal module are connected to each other through a rotating pair; the adjacent end side connecting edges of two stepped side polygonal plates of different side polygonal modules are connected to each other through a rotating pair, and the adjacent end side connecting edges of the flat side polygonal plates of different side polygonal modules are connected to each other through a rotating pair, so that the two side polygonal modules enclose the side surface of a regular prism.

[0043] In an embodiment of the present invention, each bottom polygonal component is composed of two bottom polygonal plates, namely a front bottom polygonal plate and a rear bottom polygonal plate; each bottom polygonal plate has two connecting edges, namely a side connecting edge and a bottom connecting edge, which are distributed on the inner surface of the plate, and the angles formed by the two connecting edges of all bottom polygonal plates are equal; the bottom connecting edges of the front bottom polygonal plate and the rear bottom polygonal plate of the same bottom polygonal component are interconnected through a rotating pair, so that the side connecting lines of the four bottom polygonal plates of the same bottom polygonal module are always on the same plane; the side connecting edges of the front bottom polygonal plate are all connected to the corresponding long side connecting edges of the stepped side polygonal plate on the same side through a rotating pair, and the side connecting edges of the rear bottom polygonal plate are all connected to the corresponding long side connecting edges of the flat-plate side polygonal plate on the same side through a rotating pair.

[0044] In an embodiment of the present invention, the secondary axis of rotation between the front bottom polygonal plate and the rear bottom polygonal plate connecting the same bottom polygonal component, the secondary axis of rotation between the front bottom polygonal plate and the stepped side polygonal plate connected thereto, and the secondary axis of rotation between the rear bottom polygonal plate and the flat side polygonal plate connected thereto always intersect at one point during the folding process, and the point converges at the upper or lower end of the secondary axis of rotation of the above-mentioned two side polygonal plates.

[0045] In the embodiment of the present invention, after the same bottom polygon module is fully unfolded, four bottom polygon plates form a kite or an isosceles triangle.

[0046] In the embodiment of the present invention, the revolving pair is one of a hinge, a hinge, and a bearing.

[0047] In an embodiment of the present invention, Figure 1 A stepped side polygonal plate C1 of a foldable polygonal prism is shown, having four connecting edges, namely connecting edge A1A2, connecting edge A3A4, connecting edge A4A5, and connecting edge A5A6, wherein A1A2 is parallel to A4A5, A3A4 is parallel to A5A6, A1A2 is perpendicular to A3A4, and the length of A1A13 is equal to twice the length of A4A14 (A1A13 is the wide side line A1A13 from the inner layer to the outer layer, and A4A14 is the wide side line A4A14 from the middle layer to the outer layer).

[0048] In an embodiment of the present invention, Figure 2 A flat side polygonal plate C2 of a foldable polygonal prism is shown, having four connecting edges, namely connecting edge A7A8, connecting edge A8A10, connecting edge A7A9, and connecting edge A11A12, wherein A7A8 is parallel to A11A12, A7A9 is parallel to A8A10, A7A8 is perpendicular to A7A9, the length of A7A8 is equal to the length of A4A5 in C1, and the length of A7A9 is less than the length of A3A4 in C1.

[0049] In an embodiment of the present invention, Figure 3 A front bottom polygonal plate D1 of a foldable polygonal prism is shown, having connecting edges B1B2 and connecting edges B2B3, wherein the side connecting edge is B1B2, the bottom connecting edge is B2B3, and the angle between B1B2 and B2B3 is α. Figure 4 The rear bottom polygonal plate D2 of the foldable polygonal prism is shown, having connecting edges B4B5 and connecting edges B5B6, wherein the side connecting edge is B5B6, the bottom connecting edge is B4B5, and the angle between B4B5 and B5B6 is α.

[0050] In an embodiment of the present invention, a foldable single-degree-of-freedom polygonal prism structure has two stable states, a folded state and an unfolded state. According to the shape of the unfolded state, it is divided into two modes, a triangular prism mode and a quadrangular prism mode. In general, the quadrangular prism mode is used. When the conditions satisfy , the polygonal prism is in triangular prism mode. Figure 5 The diagram of the unfolded state of the foldable triangular prism is shown. Figure 6 The schematic diagram of the intermediate state of the foldable triangular prism is shown. Figure 7 A schematic diagram of the foldable triangular prism in the folded state is shown. Figure 8 The diagram of the unfolded state of the foldable quadrangular prism is shown. Fig. 9 The schematic diagram of the intermediate state of the foldable quadrangular prism is shown. Fig.10 A schematic diagram of the folded state of the foldable quadrangular prism is shown.

[0051] A working method of a foldable single-degree-of-freedom polygonal prism structure is carried out in the following steps:

[0052] (1) After folding: There is no interference between the middle surface of the stepped side polygonal plate and the inner surface of the flat side polygonal plate. When the distance between the inner surface of the stepped side polygonal plate and the middle surface is equal to the thickness of the flat side polygonal plate, after the prism is fully folded, the middle surface of the stepped side polygonal plate of the polygonal prism and the inner surface of the flat side polygonal plate are completely fitted together, forming a thick polygonal plate after being fully folded.

[0053] (2) After unfolding: After being fully unfolded, the polygonal prism forms a completely closed polygonal prism with a self-locking function.

[0054] In an embodiment of the present invention, in the process from the unfolded state to the folded state, the middle layer surface of C1 and the inner layer surface of C2 gradually approach each other until they overlap, the inner layer surface of C1 and the inner layer surface of another C1 gradually approach each other until they overlap, the outer layer surface of C2 and the outer layer surface of another C2 gradually approach each other until they overlap, and the inner layer surface of D1 and the inner layer surface of D2 gradually approach each other until they overlap.

[0055] The structure of the polygonal connection unit in the present invention is not limited to a triangular or quadrilateral outline, and its shape, size, dimension, material, etc. can be changed to a certain extent according to actual application requirements.

[0056] The polygonal prism structure of the present invention has expandable performance, single degree of freedom during folding and unfolding, and is in a flat state when fully folded, which is convenient for processing, installation, storage and transportation. When fully unfolded, it is a fully closed polygonal prism that can be self-locked and can withstand large external forces, and can be used as a rescue tent or container. The entire structure is simple in construction, flexible and changeable, and has the advantages of high rigidity and good stability. It has important significance and broad application prospects in aerospace and civil engineering.

[0057] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A foldable single-degree-of-freedom polygonal prism structure, characterized in that: It includes two left-right symmetrical side polygon modules and two top-bottom symmetrical bottom polygon modules; The side polygonal modules each include two side polygonal plates of different sizes connected by a rotating pair, and the adjacent side polygonal plates of the left and right side polygonal modules are further connected by a rotating pair; The bottom polygon modules each include two bottom polygon components that are symmetrically arranged on the left and right, each bottom polygon component includes two bottom polygon plates of different sizes connected by a revolving pair, the bottom polygon plates are connected to the same bottom side of the corresponding side polygon plate by a revolving pair, and an opening and closing seam is formed between the two bottom polygon components located on the same bottom; Each side polygonal module is composed of two side polygonal plates, namely, a stepped side polygonal plate and a flat side polygonal plate, wherein the stepped side polygonal plates have three layers of surfaces, namely, inner, middle and outer layers, and the flat side polygonal plates have two layers of surfaces, namely, inner and outer layers; each side polygonal plate has four connecting edges, which are distributed on the two long sides and two end sides of the side polygonal plate, the two long side connecting edges are parallel to each other, the two end side connecting edges are parallel to each other, and the distances between the two long side connecting edges of all side polygonal plates are equal, and the two long side connecting edges and the two end side connecting edges are perpendicular to each other; In the stepped side polygonal plate: the two long sides and the end side connecting edges close to the flat side polygonal plate are all on the middle layer surface of the plate, and the end side connecting edges away from the flat side polygonal plate are all on the inner layer surface of the plate; in the flat side polygonal plate: the two long sides and the end side connecting edges close to the stepped side polygonal plate are all on the inner layer surface of the plate, and the end side connecting edges away from the stepped side polygonal plate are all on the outer layer surface of the plate; the adjacent end side connecting edges of the stepped side polygonal plate and the flat side polygonal plate of the same side polygonal module are connected to each other through a rotating pair; the adjacent end side connecting edges of two stepped side polygonal plates of different side polygonal modules are connected to each other through a rotating pair, and the adjacent end side connecting edges of the flat side polygonal plates of different side polygonal modules are connected to each other through a rotating pair, so that the two side polygonal modules enclose the side surface of a regular prism; Each bottom polygonal component is composed of two bottom polygonal plates, namely a front bottom polygonal plate and a rear bottom polygonal plate; each bottom polygonal plate has two connecting edges, namely a side connecting edge and a bottom connecting edge, which are distributed on the inner surface of the plate, and the angles formed by the two connecting edges of all bottom polygonal plates are equal; the bottom connecting edges of the front bottom polygonal plate and the rear bottom polygonal plate of the same bottom polygonal component are connected to each other through a revolving pair, so that the side connecting lines of the four bottom polygonal plates of the same bottom polygonal module are always on the same plane; the side connecting edges of the front bottom polygonal plate are connected to the corresponding long side connecting edges of the stepped side polygonal plate on the same side through a revolving pair, and the side connecting edges of the rear bottom polygonal plate are connected to the corresponding long side connecting edges of the flat side polygonal plate on the same side through a revolving pair; The rotational secondary axis between the front bottom polygonal plate and the rear bottom polygonal plate of the same bottom polygonal assembly, the rotational secondary axis between the front bottom polygonal plate and the stepped side polygonal plate connected thereto, and the rotational secondary axis between the rear bottom polygonal plate and the flat side polygonal plate connected thereto always intersect at one point during the folding process, and the point intersects at the upper end or the lower end of the rotational secondary axis of the two side polygonal plates; When the same bottom polygon module is fully unfolded, four bottom polygon plates form a kite shape or an isosceles triangle.

2. The foldable single-degree-of-freedom polygonal prism structure according to claim 1, characterized in that: The revolving pair is a type of hinge, hinge, or bearing.

3. A method for operating a foldable single-degree-of-freedom polygonal prism structure as claimed in any one of claims 1 to 2, characterized in that: Follow these steps: (1) After folding: There is no interference between the middle surface of the stepped side polygonal plate and the inner surface of the flat side polygonal plate. When the distance between the inner surface of the stepped side polygonal plate and the middle surface is equal to the thickness of the flat side polygonal plate, after the prism is fully folded, the middle surface of the stepped side polygonal plate of the polygonal prism and the inner surface of the flat side polygonal plate are completely fitted together, forming a thick polygonal plate after being fully folded. (2) After unfolding: After being fully unfolded, the polygonal prism forms a completely closed polygonal prism with a self-locking function.

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