CN117864423A - Self-guiding space supporting structure with high folding and unfolding ratio - Google Patents
Self-guiding space supporting structure with high folding and unfolding ratio Download PDFInfo
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Abstract
The application relates to the field of space-expanding structures, and particularly discloses a self-guiding space supporting structure with a high folding-expanding ratio, which comprises a plurality of space supporting units and a driving piece, wherein the space supporting units are sequentially connected with each other, the driving piece is used for driving the space supporting units to compress along the axial direction of the self, each space supporting unit comprises a thin-wall structure with a closed cross section, the thin-wall structure is formed by surrounding a plurality of supporting plates in an end-to-end connection mode, the supporting plates can be folded along the central line of the self, and the thin-wall structure can compress along the axial direction of the self; two groups of broken line groove groups are arranged on each supporting plate, the broken line groove groups extend obliquely from the top points of the supporting plates to the central line direction, a plurality of rib plates are fixedly arranged on the inner sides of the supporting plates, and the rib plates are positioned on the side edges of the corresponding broken line grooves; the edge of the supporting plate is provided with a triangular groove, and one vertex of the triangular groove is positioned on the central line of the supporting plate. The utility model discloses a convenient compression and extension of space bearing structure can be realized to this application, and the drive mode is simple, reliable and stable and the cost is lower.
Description
Technical Field
The application relates to the field of space-deployable structures, in particular to a self-guiding space supporting structure with a high folding-unfolding ratio.
Background
The space-deployable supporting structure is widely applied in the field of aerospace and is often used as a supporting structure of space equipment such as satellites, space antennas and the like. The space-deployable support structures require as high a folding ratio as possible to accommodate small storage space and long-range deployment requirements at the time of shipment.
At present, some complicated mechanisms are commonly used for the space expandable structure to form a space truss, and the scheme often needs many space connecting rods and too many hinge points, so that the space truss is unstable, complex in driving and high in cost. The other is realized by an inflatable paper folding structure, and the structure cannot ignore the influence of air leakage and has low reliability.
Disclosure of Invention
In order to solve the problems of complex driving and low reliability of the existing space-deployable structure, the application provides a self-guiding space supporting unit with high folding-unfolding ratio and a supporting structure.
The application provides a high-folding-ratio self-guiding space supporting unit which adopts the following technical scheme:
a high-fold ratio self-guiding spatial support unit comprising:
the support plates are rectangular and elastic, and the support plates are connected end to end and encircled to form a thin-wall structure with a closed section; the supporting plate can be folded along the central line of the supporting plate, so that the thin-wall structure can be compressed along the axial direction of the supporting plate;
two groups of broken line groove groups are arranged on each supporting plate, the broken line groove groups extend obliquely from the top points of the supporting plates to the direction of the central line, and the two groups of broken line groove groups are symmetrically distributed on two sides of the central line of the supporting plate; each group of the broken line groove groups comprises two broken line groove columns which are arranged in parallel, and each broken line groove column comprises a plurality of broken line grooves which are sequentially arranged at intervals along the length direction of the broken line groove;
the rib plates are fixedly arranged on the inner side of the supporting plate, the rib plates correspond to the positions of the folding line grooves one by one, and the rib plates are positioned on the side edges of the corresponding folding line grooves;
the triangular groove is formed in the edge of the supporting plate, and one vertex of the triangular groove is located on the central line of the supporting plate.
The fold line grooves weaken the rigidity of the support plate, and when an axial pressure is applied to the space supporting unit, the support plate is folded inwards along the fold line grooves; simultaneously, the triangular groove can reduce the counter force when the middle line of the support plate is deformed, so that the support plate is easy to fold inwards along the middle line of the support plate under the action of external force. Through the cooperation of folding wire groove and triangular groove, need not to roll over in advance, can realize space supporting unit along self axial compression.
The rib plates can enhance the rigidity of the support plate along the crease lines, and are helpful for avoiding the crease collapse caused by the weakening of the rigidity of the support plate by the crease lines during folding, thereby improving the telescopic stability of the space support unit. On the other hand, the rib plate has a guiding effect on the folding of the supporting plate: because the rib plates are positioned on the inner sides of the support plates, when the support plates are folded along the fold line grooves, the central lines of the two rows of fold line grooves always protrude along the direction pointed by the rib plates, and the initial strain energy of the deformation is smaller than the initial strain energy folded in the opposite direction, namely, the deformation accords with the principle of lowest energy; and simultaneously, when the supporting plate is folded along the central line of the supporting plate, the folding direction is kept inwards.
When the external force is removed, the supporting plate springs out under the self elastic action, so that the space supporting unit axially stretches along the self. The utility model has the advantages of simple structure, can realize the swift flexible of space supporting unit, reliable and stable.
Further, a plurality of folding seams are formed in the supporting plate, the rib plates are formed by inwards folding the supporting plate along the folding seams, and holes formed in the supporting plate after folding are the folding grooves.
Further, the folding seam comprises a long seam and short seams respectively connected to two ends of the long seam, the long seam is parallel to the folding groove, and the short seams are orthogonal to the long seam.
The supporting plate is turned inwards along the folding seam, so that rib plates and fold line grooves can be formed, and the processing steps are simpler.
Further, in each of the polygonal line groove rows, the inward folding direction of the rib faces the adjacent polygonal line groove row.
Therefore, the distance between the two rows of rib plates is relatively short, and the reinforcing effect on the crease rigidity of the support plate is relatively good.
Further, in each group of the broken line groove groups, two columns of the broken line groove columns are staggered.
Therefore, the two rows of fold line grooves are alternately arranged, the corresponding two rows of rib plates are alternately arranged, the two rows of staggered rib plates are mutually coupled, and the reinforcing effect on the crease rigidity of the support plate is better.
Further, the included angle between the broken line groove columns and the central line of the supporting plate is 30-75 degrees.
The included angle is in the range, so that the support plate can be folded smoothly.
The self-guiding space supporting structure with the high folding and unfolding ratio comprises a plurality of self-guiding space supporting units with the high folding and unfolding ratio, wherein the plurality of space supporting units are sequentially connected along the expansion and contraction direction of the space supporting units; and a driving member for driving the compression of the plurality of space supporting units.
The driving piece drives the space supporting unit to compress, so that the whole space supporting structure is flattened; external force of the driving piece is removed, and the space supporting unit is sprung out along the axial direction of the space supporting unit under the elastic action of the supporting plate, so that the whole space supporting structure is stretched into a column shape.
Further, the two opening ends of the self-guiding space supporting structure with high folding and unfolding ratio are fixedly connected with a top plate and a bottom plate respectively, the driving piece comprises ropes fixedly connected with the top plate, and the ropes penetrate through the space supporting units and penetrate through the bottom plate.
Pulling the ropes to enable the top plate to move towards the direction close to the bottom plate, and axially compressing each space supporting unit, so that the whole space supporting structure is axially flattened; the ropes are loosened, and under the elastic action of the supporting plates, the space supporting units are sprung out along the axial direction of the supporting plates, so that the whole space supporting structure is stretched into a column shape, and the space supporting structure has a high folding and unfolding ratio.
The driving mode is simple, and the compression or the extension of the space supporting structure can be realized only by operating the rope; the space supporting unit is used for installing space equipment such as an antenna and a solar panel on the space supporting unit, carrying the space supporting unit to space after being flattened, and then loosening the rope to enable the space supporting unit to be unfolded, so that the space equipment can work normally.
Further, a partition plate is arranged between two adjacent space supporting units, and the ropes sequentially penetrate through a plurality of partition plates.
The partition plate is used for separating two adjacent space supporting units from each other so as to reduce deformation coupling effect between the two adjacent space supporting units, so that deformation of each space supporting unit is independent, and the plurality of space supporting units can deform one by one under the driving of the rope, thereby realizing orderly compression or expansion of the space supporting structure.
Further, the triangular grooves in the plurality of space supporting units are gradually arranged, and the sizes of the triangular grooves gradually decrease from the top plate to the bottom plate.
The larger the size of the triangular groove is, the smaller the deformation rigidity of the space supporting unit is; in the space supporting unit close to the top plate, the triangular groove is larger in size, and the deformation rigidity of the space supporting unit is smaller; in the space supporting unit close to the bottom plate, the triangular groove is smaller in size, and the deformation rigidity of the space supporting unit is larger; i.e. from the top plate to the bottom plate, the deformation stiffness of the space supporting unit increases in sequence. In this way, when the space supporting structure is compressed by the rope driving, the space supporting units close to the top plate will be compressed first, and then the plurality of space supporting units are compressed in sequence along the direction from the top plate to the bottom plate, which helps to ensure the ordering and stability of the overall compression of the space supporting structure.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the folding slot is matched with the triangular slot, so that the space supporting unit can stretch along the axial direction of the space supporting unit without pre-folding;
2. the rib plates can enhance the rigidity of the support plate along the crease lines and are beneficial to avoiding the crease lines from being crushed due to the weakening of the rigidity of the support plate by the crease lines during folding, thereby improving the telescopic stability of the space support unit;
3. the space supporting structure has higher folding and unfolding ratio and simple driving mode, and can be compressed or stretched only by operating the rope;
4. through setting up baffle and size gradual change's triangular groove, help guaranteeing the orderly nature and the stability of space bearing structure whole compression.
Drawings
Fig. 1 is a schematic view of the overall structure of a space supporting unit in embodiment 1 of the present application;
fig. 2 is a schematic structural view of a support plate in embodiment 1 of the present application;
FIG. 3 is a schematic view mainly used for showing a compressed state of a space supporting unit in embodiment 1 of the present application;
FIG. 4 is a schematic view of the overall structure of the space supporting structure in embodiment 2 of the present application;
FIG. 5 is a schematic view of a partial exploded structure of a space supporting structure in embodiment 2 of the present application;
fig. 6 is a schematic diagram mainly used for showing a compressed state of the space supporting structure in embodiment 2 of the present application.
Reference numerals: 1. a space supporting unit; 11. a support plate; 111. a midline; 12. a folding groove; 13. rib plates; 14. triangular grooves; 15. folding the seam; 151. a long seam; 152. a short seam; 2. a top plate; 3. a bottom plate; 4. a partition plate; 5. a rope.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
Example 1
The embodiment of the application discloses a self-guiding space supporting unit 1 with high folding and unfolding ratio. Referring to fig. 1, a self-guiding space supporting unit 1 with high folding and unfolding ratio comprises a plurality of rectangular supporting plates 11, wherein the supporting plates 11 are connected end to form a thin-wall structure with a closed section; in this embodiment, four support plates 11 are provided, and four support plates 11 surround to form a columnar thin-wall structure with a square cross section. The support plate 11 has elasticity and may be made of a rubber-like material, such as TPU rubber, etc. The support plate 11 is foldable about its own midline 111 so that the thin-walled structure is compressible axially about itself.
Referring to fig. 1, each supporting plate 11 is provided with two groups of polygonal line groove groups, the polygonal line groove groups extend obliquely from the top of the supporting plate 11 to the direction of the central line 111, and the two groups of polygonal line groove groups are symmetrically distributed on two sides of the central line 111 of the supporting plate 11. Each group of broken line groove group comprises two parallel broken line groove columns, and each line groove column comprises a plurality of broken line grooves 12 which are sequentially arranged at intervals along the length direction of the line groove. The inner side of the supporting plate 11 is fixedly provided with a plurality of rib plates 13, the rib plates 13 are in one-to-one correspondence with the positions of the folding line grooves 12, and the rib plates 13 are positioned on the side edges of the corresponding folding line grooves 12.
The folding groove 12 and the rib plate 13 are processed by the following method:
referring to fig. 1 and 2, a plurality of C-shaped folding slits 15 are formed in the support plate 11, the folding slits 15 include a long slit 151 and short slits 152 respectively connected to both ends of the long slit 151, the short slits 152 are orthogonal to the long slit 151, and the long slit 151 and the two short slits 152 are surrounded to form a rectangular folding area; the folding area is folded inwards along the folding seam 15 to form the rib plate 13, and the hole formed on the folded support plate 11 is a fold line groove 12. Thus, the rib plates 13 are in one-to-one correspondence with the positions of the folding line grooves 12, and the rib plates 13 are positioned at the side edges of the corresponding folding line grooves 12.
To reduce interference during folding of the rib 13, the width of the fold seam 15 is approximately 1/4 of the thickness of the support panel 11. In order to reduce the rebound of the rib 13 after being folded, the folded rib 13 can be heated and cooled, so that the rib 13 can be shaped.
Further, referring to fig. 1 and 2, the edge of the support plate 11 is provided with a triangular groove 14, and one vertex of the triangular groove 14 is located on a center line 111 of the support plate 11.
The folding line groove 12 weakens the rigidity of the support plate 11, and when an axial pressure is applied to the thin-walled structure of the space supporting unit 1, the support plate 11 is folded inward along the folding line groove 12; the smaller the distance between two adjacent columns of broken line groove columns, the stronger the mechanical coupling between the two columns of broken line groove columns, and the better the folding effect. In order to realize smooth folding of the support plate 11, the included angle between the fold line groove rows and the central line 111 of the support plate 11 is 30-75 degrees.
Meanwhile, the triangular grooves 14 can reduce the counterforce when the line 111 of the support plate 11 is deformed, so that the support plate 11 is easy to fold inwards along the line 111 under the action of external force. By the cooperation of the folding groove 12 and the triangular groove 14, the space supporting unit 1 can be compressed along the axial direction without pre-folding.
The rib plates 13 can enhance the rigidity of the supporting plate 11 along the crease lines of the crease lines 12, and are helpful for avoiding the crease lines from being crushed due to the weakening of the rigidity of the supporting plate 11 by the crease lines 12 during folding, so that the telescopic stability of the space supporting unit 1 is improved. In order to enhance the reinforcing effect of the rib 13, the width of the rib 13 is about 4 times the thickness of the support plate 11.
In order to further enhance the reinforcing effect of the rib plate 13, referring to fig. 1 and 2, in each group of the fold line groove groups, the open ends of the two rows of the fold slits 15 "c" are arranged in opposition, so that in each row of the fold line groove rows, the inward folding direction of the rib plate 13 faces the adjacent fold line groove row. In this way, the distance between the two rows of ribs 13 is closer, and the reinforcing effect on the crease rigidity of the support plate 11 is better.
Further, referring to fig. 1, in each group of the polyline slots, two columns of polyline slots are staggered, that is, the polyline slots 12 are not arranged in a one-to-one correspondence but are alternately arranged between two adjacent columns of polyline slots. So, corresponding two lines of rib plates 13 are also arranged alternately, and two lines of staggered rib plates 13 are mutually coupled, so that the reinforcing effect on the crease rigidity of the supporting plate 11 is better.
On the other hand, the rib 13 has a guiding effect on the folding of the support plate 11: since the rib plates 13 are positioned on the inner sides of the supporting plates 11, when the supporting plates 11 are folded along the folding line grooves 12, the central lines of the two rows of the folding line grooves 12 always protrude along the direction pointed by the rib plates 13, because the initial strain energy of the deformation is smaller than the initial strain energy of the folding in the opposite direction, namely, the deformation accords with the principle of lowest energy; while also allowing the support panel 11 to remain inwardly folded along its own midline 111.
Under the guiding action of the rib plates 13, the central lines 111 of all the supporting plates 11 protrude towards the inside of the thin-wall structure, so that a negative Poisson ratio effect is formed; continuing compression, regular folding will be exhibited until collapsed, as shown in fig. 3.
When the external force is removed, the supporting plate 11 springs open under its own elastic action, thereby stretching the space supporting unit 1 in its own axial direction. The utility model has the advantages of this application simple structure can realize the swift flexible of space supporting unit 1, and is reliable and stable, has higher book and exhibits the ratio.
The implementation principle of the self-guiding space supporting unit 1 with high folding and unfolding ratio in the embodiment of the application is as follows: when an axial pressure is applied to the thin-walled structure of the space supporting unit 1, the supporting plate 11 is folded inwardly along the fold line groove 12; meanwhile, the triangular grooves 14 can reduce the counterforce when the line 111 of the support plate 11 deforms, so that the support plate 11 is easy to fold inwards along the line 111 under the action of external force; by the cooperation of the folding groove 12 and the triangular groove 14, the space supporting unit 1 can be compressed along the axial direction without pre-folding. The rib 13 can enhance the rigidity of the support plate 11 along the crease lines 12, thereby improving the stability of the expansion and contraction of the space supporting unit 1. When the external force is removed, the supporting plate 11 springs open under its own elastic action, thereby stretching the space supporting unit 1 in its own axial direction. The space supporting unit 1 that this application provided simple structure can realize the swift flexible of space supporting unit 1, and is reliable and stable.
Example 2
The embodiment of the application discloses a self-guiding space supporting structure with high folding and unfolding ratio. Referring to fig. 4, the high-folding-ratio self-guiding space supporting structure includes a plurality of high-folding-ratio self-guiding space supporting units 1, and the plurality of space supporting units 1 are sequentially connected along the expansion and contraction direction thereof; and a driving member for driving the compression of the plurality of space supporting units 1.
Specifically, referring to fig. 4 and 5, two open ends of the self-guiding space supporting structure with high folding ratio are fixedly connected with a top plate 2 and a bottom plate 3 respectively, the driving member comprises a rope 5 fixedly connected with the top plate 2, and the rope 5 is arranged in the plurality of space supporting units 1 in a penetrating manner and penetrates through the bottom plate 3.
Pulling the ropes 5 moves the top plate 2 in a direction approaching the bottom plate 3, compressing each space supporting unit 1 in its own axial direction, thereby collapsing the entire space supporting structure in the axial direction, as shown in fig. 6. The rope 5 is loosened, and under the elastic action of the supporting plate 11, the space supporting unit 1 is sprung out along the axial direction of the supporting plate, so that the whole space supporting structure is stretched into a column shape, and the folding and unfolding ratio is high.
In order to achieve orderly expansion and contraction of the plurality of space supporting units 1, referring to fig. 4 and 5, a partition plate 4 is provided between two adjacent space supporting units 1, and a rope 5 sequentially penetrates the plurality of partition plates 4.
The partition 4 serves to separate the adjacent two space supporting units 1 from each other to reduce a deformation coupling effect between the adjacent two space supporting units 1 such that the deformation of each space supporting unit 1 is independent from each other. The plurality of space supporting units 1 can be deformed one by one under the driving of the ropes 5, so that the orderly compression or expansion of the space supporting structure is realized.
Further, referring to fig. 4, the triangular grooves 14 in the plurality of space supporting units 1 are provided in a gradually decreasing size, and the triangular grooves 14 decrease in size in sequence from the top plate 2 to the bottom plate 3.
The larger the size of the triangular groove 14, the smaller the deformation rigidity of the space supporting unit 1. In the space supporting unit 1 near the top plate 2, the triangular groove 14 is larger in size, and the space supporting unit 1 is smaller in deformation rigidity; in the space supporting unit 1 close to the bottom plate 3, the triangular groove 14 is smaller in size, and the deformation rigidity of the space supporting unit 1 is larger; i.e. from the top plate 2 to the bottom plate 3, the deformation stiffness of the space supporting unit 1 increases in sequence.
In this way, when the space supporting structure is driven to compress by the ropes 5, the space supporting units 1 close to the top plate 2 will be compressed first, and then the plurality of space supporting units 1 are compressed in sequence in the direction from the top plate 2 to the bottom plate 3, helping to ensure the ordering and stability of the overall compression of the space supporting structure.
The space supporting structure that this application provided drives the mode simply, only needs operating rope 5 just can realize space supporting structure's compression or extension, and the cost is lower and stability is high. The space equipment such as this application can be applied to the space field, installs space equipment such as antenna, solar panel on space supporting unit 1, carries to the space after flattening a plurality of space supporting units 1, unclamps rope 5 afterwards, makes a plurality of space supporting units 1 expand in proper order, and the normal work of the space equipment of being convenient for.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. A self-guiding space supporting unit with high folding and unfolding ratio is characterized in that: comprising the following steps:
the support plates are rectangular and elastic, and the support plates are connected end to end and encircled to form a thin-wall structure with a closed section; the supporting plate can be folded along the central line of the supporting plate, so that the thin-wall structure can be compressed along the axial direction of the supporting plate;
two groups of broken line groove groups are arranged on each supporting plate, the broken line groove groups extend obliquely from the top points of the supporting plates to the direction of the central line, and the two groups of broken line groove groups are symmetrically distributed on two sides of the central line of the supporting plate; each group of the broken line groove groups comprises two broken line groove columns which are arranged in parallel, and each broken line groove column comprises a plurality of broken line grooves which are sequentially arranged at intervals along the length direction of the broken line groove;
the rib plates are fixedly arranged on the inner side of the supporting plate, the rib plates correspond to the positions of the folding line grooves one by one, and the rib plates are positioned on the side edges of the corresponding folding line grooves;
the triangular groove is formed in the edge of the supporting plate, and one vertex of the triangular groove is located on the central line of the supporting plate.
2. The high-folding-ratio self-guiding spatial support unit according to claim 1, wherein: the support plate is provided with a plurality of folding seams, the rib plates are formed by inwards folding the support plate along the folding seams, and after folding, holes formed in the support plate are the folding grooves.
3. The high-folding-ratio self-guiding spatial support unit according to claim 2, wherein: the folding seam comprises a long seam and short seams which are respectively connected with two ends of the long seam, the long seam is parallel to the folding groove, and the short seams are orthogonal to the long seam.
4. The high-folding-ratio self-guiding spatial support unit according to claim 2, wherein: in each column of the broken line groove columns, the inward turning direction of the rib plates faces the adjacent broken line groove columns.
5. The high-folding-ratio self-guiding spatial support unit according to claim 1, wherein: in each group of the broken line groove groups, two columns of the broken line groove columns are staggered.
6. The high-folding-ratio self-guiding spatial support unit according to claim 1, wherein: the included angle between the broken line groove columns and the central line of the supporting plate is 30-75 degrees.
7. The utility model provides a high self-guiding space bearing structure that turns over to expand than which characterized in that: the self-guiding space supporting unit with high folding and unfolding ratio comprises a plurality of self-guiding space supporting units with high folding and unfolding ratio as claimed in any one of claims 1 to 6, wherein the plurality of space supporting units are sequentially connected along the expansion and contraction direction of the space supporting units; and a driving member for driving the compression of the plurality of space supporting units.
8. The high-fold-ratio self-guiding spatial support structure according to claim 7, wherein: the two opening ends of the self-guiding space supporting structure with high folding and unfolding ratio are fixedly connected with a top plate and a bottom plate respectively, the driving piece comprises ropes fixedly connected with the top plate, and the ropes penetrate through the space supporting units and penetrate through the bottom plate.
9. The high-fold ratio self-guiding spatial support structure according to claim 8, wherein: a partition plate is arranged between two adjacent space supporting units, and the ropes sequentially penetrate through a plurality of partition plates.
10. The high-fold-ratio self-guiding spatial support structure according to claim 7, wherein: the size of the triangular grooves in the plurality of space supporting units is gradually changed, and the sizes of the triangular grooves are gradually decreased from the top plate to the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410015136.3A CN117864423A (en) | 2024-01-04 | 2024-01-04 | Self-guiding space supporting structure with high folding and unfolding ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410015136.3A CN117864423A (en) | 2024-01-04 | 2024-01-04 | Self-guiding space supporting structure with high folding and unfolding ratio |
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| Publication Number | Publication Date |
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| CN117864423A true CN117864423A (en) | 2024-04-12 |
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| CN202410015136.3A Pending CN117864423A (en) | 2024-01-04 | 2024-01-04 | Self-guiding space supporting structure with high folding and unfolding ratio |
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| CN (1) | CN117864423A (en) |
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