阅读说明：本技术 一种以三角形为底面的可折展盒子结构 (Foldable box structure with triangle as bottom surface ) 是由 陈焱 顾元庆 贾振浩 马家耀 崔琦峰 李明 于 2020-06-30 设计创作，主要内容包括：本发明公开一种以三角形为底面的可折展盒子结构,包括十二个面,依次为第一面、第二面、第三面、第四面、第五面、第六面、第七面、第八面、第九面、第十面、第十一面、第十二面；第一面、第二面、第三面、第四面相连作为可折展盒子结构的底面并放置于中部；第五面、第六面、第七面、第八面、第九面、第十面、第十一面、第十二面依次相连形成可折展盒子结构的三个侧面；三个侧面置于底面上方且分别与底面的三条边相连,并且三个侧面依次相连；各个面之间均通过转动副相互连接。(The invention discloses a foldable and unfoldable box structure with a triangle as a bottom surface, which comprises twelve surfaces, namely a first surface, a second surface, a third surface, a fourth surface, a fifth surface, a sixth surface, a seventh surface, an eighth surface, a ninth surface, a tenth surface and a tenth surface; the first surface, the second surface, the third surface and the fourth surface are connected to be used as the bottom surface of the foldable box structure and are placed in the middle; the fifth surface, the sixth surface, the seventh surface, the eighth surface, the ninth surface, the tenth surface and the twelfth surface are sequentially connected to form three side surfaces of the foldable and unfoldable box structure; the three side surfaces are arranged above the bottom surface and are respectively connected with three edges of the bottom surface, and the three side surfaces are sequentially connected; all the surfaces are mutually connected through a rotating pair.)

1. A foldable box structure with a triangle as a bottom surface is characterized by comprising twelve surfaces, namely a first surface, a second surface, a third surface, a fourth surface, a fifth surface, a sixth surface, a seventh surface, an eighth surface, a ninth surface, a tenth surface and a tenth surface in sequence;

the first surface, the second surface, the third surface and the fourth surface are connected to be used as the bottom surface of the foldable box structure and are placed in the middle; the fifth surface, the sixth surface, the seventh surface, the eighth surface, the ninth surface, the tenth surface and the twelfth surface are sequentially connected to form three side surfaces of the foldable and unfoldable box structure; the fifth surface and the sixth surface are connected to form a first side surface, the seventh surface, the eighth surface, the ninth surface and the tenth surface are connected to form a second side surface, and the tenth surface and the twelfth surface are connected to form a third side surface; the first side surface, the second side surface and the third side surface are arranged above the bottom surface and are respectively connected with the three edges of the bottom surface, and the first side surface, the second side surface and the third side surface are sequentially connected;

the first surface and the second surface are adjacent and are mutually connected through a first rotating pair, the second surface and the third surface are adjacent and are mutually connected through a second rotating pair, the third surface and the fourth surface are adjacent and are mutually connected through a third rotating pair, and the first surface and the fourth surface are adjacent and are mutually connected through a fourth rotating pair; the fifth surface is adjacent to the sixth surface and interconnected by a fifth revolute pair, the seventh surface is adjacent to the eighth surface and interconnected by a sixth revolute pair, the eighth surface is adjacent to the ninth surface and interconnected by a seventh revolute pair, the ninth surface is adjacent to the tenth surface and interconnected by an eighth revolute pair, and the tenth surface is adjacent to the twelfth surface and interconnected by a ninth revolute pair; the first side surface is adjacent to the first surface and interconnected through a tenth revolute pair, the second side surface is adjacent to the second surface and interconnected through an eleventh revolute pair, the second side surface is adjacent to the third surface and interconnected through a twelfth revolute pair, and the third side surface is adjacent to the fourth surface and interconnected through a thirteenth revolute pair; the first side surface is adjacent to the second side surface and interconnected by a fourteenth revolute pair, the second side surface is adjacent to the third side surface and interconnected by a fifteenth revolute pair, and the third side surface is adjacent to the first side surface and interconnected by a sixteenth revolute pair.

2. A foldable and unfoldable box structure with triangular bottom surface as claimed in claim 1, characterized in that, in case of complete folding into plane, all the revolute pair axes are on the same plane; in the fully expanded condition, a triangular prism-like box structure is formed; the outer contour line of each face is a straight line, a curved line or a broken line.

3. A foldable and expandable box structure with a triangular bottom surface according to claim 1 or 2, wherein the foldable and expandable box structure has a single degree of freedom, and the interconversion between the spatial structure and the planar polygonal structure can be realized by changing the included angle between the adjacent surfaces.

4. A foldable and expandable box structure with triangular bottom surface according to claim 1 or 2, wherein the foldable and expandable box structure is a prism structure with triangular bottom surface in the fully expanded state and a rectangular plane structure in the fully folded state.

5. A foldable and unfoldable box structure with triangular bottom surface as claimed in claim 1 or 2, characterized in that said revolutionary pair is formed by one of hinge, hinge or bearing.

Technical Field

The invention relates to a foldable box structure, in particular to a foldable box structure which is based on a paper folding structure, has single degree of freedom and large folding-unfolding ratio and takes a triangle as a bottom surface.

Background

In aerospace, building structures, transportation, artwork and daily life, polyhedral structures are widely applied due to good symmetry, but due to the limitation of large volume and inconvenience in transportation, polyhedral structures are more applied to fixed occasions. The cubic small satellite which is rated as ten technological breakthroughs in 2014 by the journal of SCIENCE is a typical representative of the aerospace field which pursues miniaturization and low-cost emission, but the defect of narrow working space in an on-orbit state also restricts the further application of the cubic small satellite.

The space-shaped foldable structure is a novel structure which emerges along with the development of aerospace science and technology, is in a folding and accommodating state in the launching and returning recovery processes, and occupies the least space of the airship; after the body-shaped foldable structure is placed into the orbit, the body-shaped foldable structure can be unfolded into a working state with a larger space according to the design. The basic unit of the space expandable structure adopts an over-constraint mechanism, and has the advantages of high rigidity, simplicity in manufacturing, low cost, high reliability and the like.

The existing container can not be folded, occupies a large amount of space when no load exists, and brings great difficulty to storage and transportation; or the folding process is complex, the structural freedom is more, and the folding and unfolding process is not easy to control, such as the foldable container proposed in 2019 by Marxiong.

Therefore, the body-shaped expandable structure, particularly the prism structure taking the polygon as the bottom surface, is applied less at present, has the defects of incomplete folding, small folding and expanding ratio and the like, and has great application and improvement space in the aspects of container transportation and the like.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a foldable box structure with a triangular bottom surface. The expandable box structure has better rigidity; the folding and unfolding device can be completely folded and unfolded, has small volume and regular shape during folding, is convenient to transport, and has larger working space when being unfolded into a working state according to requirements; the whole structure has only one degree of freedom, and the motion control is simple; the structural unit is a plane or curved plate, the processing is simple, and the batch production can be realized; based on the advantages, the invention has important significance and wide application prospect in a plurality of fields such as packaging, storage, container transportation, civil structure, aerospace and the like.

The purpose of the invention is realized by the following technical scheme:

a foldable box structure with a triangle as a bottom surface comprises twelve surfaces which are a first surface, a second surface, a third surface, a fourth surface, a fifth surface, a sixth surface, a seventh surface, an eighth surface, a ninth surface, a tenth surface and a twelfth surface in sequence;

the first surface, the second surface, the third surface and the fourth surface are connected to be used as the bottom surface of the foldable box structure and are placed in the middle; the fifth surface, the sixth surface, the seventh surface, the eighth surface, the ninth surface, the tenth surface and the twelfth surface are sequentially connected to form three side surfaces of the foldable and unfoldable box structure; the fifth surface and the sixth surface are connected to form a first side surface, the seventh surface, the eighth surface, the ninth surface and the tenth surface are connected to form a second side surface, and the tenth surface and the twelfth surface are connected to form a third side surface; the first side surface, the second side surface and the third side surface are arranged above the bottom surface and are respectively connected with the three edges of the bottom surface, and the first side surface, the second side surface and the third side surface are sequentially connected;

the first surface and the second surface are adjacent and are mutually connected through a first rotating pair, the second surface and the third surface are adjacent and are mutually connected through a second rotating pair, the third surface and the fourth surface are adjacent and are mutually connected through a third rotating pair, and the first surface and the fourth surface are adjacent and are mutually connected through a fourth rotating pair; the fifth surface is adjacent to the sixth surface and interconnected by a fifth revolute pair, the seventh surface is adjacent to the eighth surface and interconnected by a sixth revolute pair, the eighth surface is adjacent to the ninth surface and interconnected by a seventh revolute pair, the ninth surface is adjacent to the tenth surface and interconnected by an eighth revolute pair, and the tenth surface is adjacent to the twelfth surface and interconnected by a ninth revolute pair; the first side surface is adjacent to the first surface and interconnected through a tenth revolute pair, the second side surface is adjacent to the second surface and interconnected through an eleventh revolute pair, the second side surface is adjacent to the third surface and interconnected through a twelfth revolute pair, and the third side surface is adjacent to the fourth surface and interconnected through a thirteenth revolute pair; the first side surface is adjacent to the second side surface and interconnected by a fourteenth revolute pair, the second side surface is adjacent to the third side surface and interconnected by a fifteenth revolute pair, and the third side surface is adjacent to the first side surface and interconnected by a sixteenth revolute pair.

Further, under the condition of completely folding into a plane, all the revolute pair axes are on the same plane; in the fully expanded condition, a triangular prism-like box structure is formed; the outer contour line of each face is a straight line, a curved line or a broken line.

Furthermore, the foldable box structure has a single degree of freedom, and the mutual conversion between the space body-shaped structure and the plane polygonal structure can be realized by changing the included angle of the adjacent surfaces.

Furthermore, the foldable box structure is a prism structure with a triangle as the bottom surface in a fully unfolded state, and is a rectangular plane structure in a fully folded state.

Furthermore, the revolute pair is formed by one of a hinge, a hinge or a bearing.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1. the invention has larger folding and unfolding ratio, can be directly folded into a plane polygon structure by a prism structure taking a polygon as a bottom surface, and can realize complete folding.

2. The invention has a degree of freedom through the design of a space mechanism, can finish folding and unfolding actions through single drive, and has convenient installation and use and reliable movement.

3. The invention is designed with the aim of functionality, the size of the unit structure can be designed according to actual requirements, the size of the revolute pair can be adjusted according to requirements, the installation driving position can be selected at will under the actual requirements, and cavities with any shapes can be arranged on the surface according to the actual requirements.

4. The unfolded rectangular prism has a straight prism structure, the side surface of the prism is vertical to the bottom surface, the structure is stable, the rigidity is high, the working space is large, and the support and the work are convenient; the folded product has small volume, regular shape, stable structure and convenient transportation and storage.

5. The invention has simple structure, and the connection between the two adjacent surfaces can be realized by the revolute pair without installing other connection structures in the surface, thereby improving the stability of installation and control.

Drawings

Fig. 1-1 is a schematic view of a fully unfolded state of the foldable box structure according to an embodiment, wherein the fully unfolded state is a prism structure with a triangle as a bottom surface.

FIGS. 1-2 are plan expanded views of a box structure according to an embodiment;

fig. 1-3 are schematic views of the flat rectangular structure of the fully folded box structure of one embodiment.

Fig. 1-4 and 1-5 are schematic views showing a folding sequence of a box structure according to an embodiment, wherein fig. 1-4 show an intermediate folding state and fig. 1-5 show a fully folded state.

FIG. 2-1 is a schematic view of the fully unfolded state of the foldable box structure according to the second embodiment, wherein the fully unfolded state is a prism structure with a triangle as the bottom.

FIG. 2-2 is a plan view of the second box structure of the embodiment;

FIGS. 2-3 are schematic views of the planar rectangular structure of the fully folded two-box structure of the embodiment.

Fig. 2-4 and 2-5 are schematic views of the folding sequence of the two-box structure of the embodiment, wherein fig. 2-4 show the intermediate folding state and fig. 2-5 show the fully folded state.

FIG. 3-1 is a schematic view of the fully unfolded state of the foldable box structure of the third embodiment, wherein the fully unfolded state is a prism structure with a triangle as the bottom surface.

FIG. 3-2 is a plan expanded view of a three-box structure of the embodiment;

fig. 3-3 are schematic views of the planar rectangular structure of the three-box structure of the embodiment in a fully folded state.

Fig. 3-4 and 3-5 are schematic views of the folding sequence of the three-box structure of the embodiment, wherein fig. 3-4 show the intermediate folding state and fig. 3-5 show the fully folded state.

Reference numerals:

for the first embodiment:

a1-a first face, A2-a second face, A3-a third face, A4-a fourth face, A5-a fifth face, A6-a sixth face, A7-a seventh face, A8-an eighth face, A9-a ninth face, A10-a tenth face, A11-a tenth face, A12-a tenth face;

u0-bottom, U1-first side, U2-second side, U3-third side;

l1-a first revolute pair, L2-a second revolute pair, L3-a third revolute pair, L4-a fourth revolute pair, L5-a fifth revolute pair, L6-a sixth revolute pair, L7-a seventh revolute pair, L8-an eighth revolute pair, L9-a ninth revolute pair, L10-a tenth revolute pair, L11-an eleventh revolute pair, L12-a twelfth revolute pair, L13-a thirteenth revolute pair, L14-a fourteenth revolute pair, L15-a fifteenth revolute pair, and L16-a sixteenth revolute pair.

For example two:

b1-first face, B2-second face, B3-third face, B4-fourth face, B5-fifth face, B6-sixth face, B7-seventh face, B8-eighth face, B9-ninth face, B10-tenth face, B11-tenth face, B12-tenth face;

v0-bottom, V1-first side, V2-second side, V3-third side;

m1-a first revolute pair, M2-a second revolute pair, M3-a third revolute pair, M4-a fourth revolute pair, M5-a fifth revolute pair, M6-a sixth revolute pair, M7-a seventh revolute pair, M8-an eighth revolute pair, M9-a ninth revolute pair, M10-a tenth revolute pair, M11-an eleventh revolute pair, M12-a twelfth revolute pair, M13-a thirteenth revolute pair, M14-a fourteenth revolute pair, M15-a fifteenth revolute pair, and M16-a sixteenth revolute pair.

For example three:

c1-first face, C2-second face, C3-third face, C4-fourth face, C5-fifth face, C6-sixth face, C7-seventh face, C8-eighth face, C9-ninth face, C10-tenth face, C11-tenth face, C12-tenth face;

w0-bottom, W1-first side, W2-second side, W3-third side;

n1-a first revolute pair, N2-a second revolute pair, N3-a third revolute pair, N4-a fourth revolute pair, N5-a fifth revolute pair, N6-a sixth revolute pair, N7-a seventh revolute pair, N8-an eighth revolute pair, N9-a ninth revolute pair, N10-a tenth revolute pair, N11-an eleventh revolute pair, N12-a twelfth revolute pair, N13-a thirteenth revolute pair, N14-a fourteenth revolute pair, N15-a fifteenth revolute pair, and N16-a sixteenth revolute pair.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.