Three-dimensional secondary space film folding and storing mechanism

Abstract

A three-dimensional secondary space film folding storage mechanism relates to the field of film storage, and comprises a bottom film assembly, an upper film assembly, W-shaped unfoldable rib assemblies and a plurality of telescopic stretching arms, the plurality of W-shaped unfoldable rib assemblies form a layer of rib group, and a plurality of layers of rib groups are arranged; each W-shaped deployable rib assembly comprises a root hinge, an inter-rod hinge and four carbon fiber rods, the carbon fiber rods are sequentially connected through the inter-rod hinges to obtain a carbon fiber rod chain, and the two ends of the carbon fiber rod chain are connected with the root hinges; the two ends of the upper thin film assembly are connected with the carbon fiber rods of the two adjacent rib sets respectively, and the bottom thin film assembly is connected to the carbon fiber rods of the bottom rib set and fixed to the bottom of the cabin body. Root hinges at the two ends of the W-shaped unfoldable rib assembly are connected to the two adjacent stretching arms, and the root hinges are rotationally connected with the stretching arms with the axes of the stretching arms as axes. The storage rack can be stored repeatedly, and is light in weight and large in storage ratio.

Description

Technical Field

[0001] The invention relates to a three-dimensional secondary space film folding and storing mechanism, which is particularly suitable for an ultra-large and ultra-lightweight expandable film structure. Background Art

[0002] With the increasing demand for large-diameter (hundreds of square meters or even larger) antennas in spacecraft, large-scale deployable membrane structures in space have become one of the current research hotspots for spacecraft. Traditional rigid structures of spacecraft cannot meet the requirements of transportation due to their large launch volume and weight, while deployable membrane structures have received great attention due to their advantages such as light weight and large storage ratio.

[0003] ESA designed the Global Astronomical Interferometer for Astrophysics (GAIA) sunshield, which was deployed in orbit in December 2013. It consists of 12 H-shaped carbon fiber-aluminum racks, each with two simple seats at the bottom. A motor provides continuous mechanical torque, allowing the racks to smoothly and synchronously expand from vertical to horizontal, forming a circular plane with a diameter of 10.3m. However, this sunshade structure is a single-layer film structure, and the film structure is deployed once. The James Webb Space Telescope (JWST) uses a film sunshade. The JWST sunshade is 22 meters long and has 5 layers. It uses a polymer film material. The deployment design principle is that two combined brackets rotate and unfold on a fixed axis, and combine with two variable diameter sleeve rods to move in a directional manner to gradually unfold multiple layers of sunshade film. However, the storage is relatively large and the film storage mechanism is heavy. Summary of the invention

[0004] The technical problem solved by the present application is: to overcome the shortcomings of existing film storage mechanisms, such as one-time storage, heavy weight and large storage ratio, and to provide a three-dimensional secondary space film folding storage mechanism with three-dimensional secondary storage, light weight and large storage ratio, which can meet the needs of large-scale satellite payloads for a large-scale, lightweight, and small-volume expandable film sunshade, and can be deployed stably and reliably.

[0005] The technical solutions provided by this application are as follows:

[0006] A three-dimensional secondary space film folding and storage mechanism, comprising a film assembly, a W-shaped expandable rib assembly and a linear extension mechanism, wherein n W-shaped expandable rib assemblies form a layer of rib groups, n is a positive integer not less than 1, and a total of m layers of rib groups arranged vertically are arranged, m is a positive integer; the film assembly comprises a bottom film assembly and an upper film assembly; each W-shaped expandable rib assembly comprises a root hinge, an inter-rod hinge and four carbon fiber rods, the four carbon fiber rods are sequentially connected by three inter-rod hinges to obtain a carbon fiber rod chain, and both ends of the carbon fiber rod chain are connected to the root hinge; the upper film assembly The two ends are respectively connected to the carbon fiber rods of the two adjacent layers of rib groups, the bottom film assembly is connected to the carbon fiber rods of the bottom rib group, and the bottom film assembly is fixed to the bottom of the cabin; the linear extension mechanism includes a plurality of retractable extension arms, the root hinges at both ends of each W-shaped expandable rib assembly are connected to the two adjacent extension arms, and the root hinge is rotatably connected to the extension arm with the axis of the extension arm as the axis; the root hinge rotates, driving the W-shaped expandable rib assembly, the expansion arm and the film assembly to expand circumferentially; the expansion arm expands, driving the distance between the two adjacent layers of rib groups to increase, and the film assembly is longitudinally expanded.

[0007] If there is another W-shaped deployable rib assembly above one of the W-shaped deployable rib assemblies, the W-shaped deployable rib assembly is located at a lower layer, and both sides of the carbon fiber rod of the W-shaped deployable rib assembly at the lower layer are detachably connected with ultra-thin aluminum honeycomb panels.

[0008] Two adjacent W-shaped expandable rib assemblies in the vertical direction are positioned by a wedge, that is, the lower side of the upper W-shaped expandable rib assembly and the upper side of the lower W-shaped expandable rib assembly are both inclined surfaces, and the two inclined surfaces are in contact with each other when in the folded state, thereby ensuring the synchronization of the expansion process of the four-layer W-shaped expandable rib assembly.

[0009] All the root hinges and inter-rod hinges in the rib group of one layer are linked by ropes.

[0010] The bottom film component is a circumferentially deployable sunshade screen, a through hole is provided in the middle of the circumferentially deployable sunshade screen, the edge of the through hole forms the inner edge of the circumferentially deployable sunshade screen, the inner edge is fixed on the bottom of the cabin, and the outer edge is connected to the carbon fiber rods of the bottom rib group; in order to solve the problem of folding and storing the circumferentially deployable sunshade screen, the folded state of the circumferentially deployable sunshade screen is composed of Miura origami units and "Z"-shaped origami units, the edge connected to the W-shaped rib component adopts Miura folding, and the edge connected to the extension arm adopts "Z"-shaped folding. This folding method can not only realize the orderly folding and storage of the flat film, but also ensure the coordination between the film folding and the mechanism folding.

[0011] The upper film assembly includes a cylindrical high-insulation film structure and an oblique-cut wave-transparent film structure. The m-layer rib groups are the first layer rib group, the second layer rib group, the third layer rib group and the fourth layer rib group from bottom to top. The cylindrical high-insulation film structure is cylindrical in shape. One end of the cylindrical high-insulation film structure is connected to the carbon fiber rod of the first layer rib group, and the other end is connected to the carbon fiber rod of the second layer rib group. The oblique-cut wave-transparent film structure is divided into an upper section and a lower section. One end of the lower section is connected to the carbon fiber rod of the second layer rib group, and the other end is connected to the carbon fiber rod of the third layer rib group. One end of the upper section is connected to the carbon fiber rod of the third layer rib group, and the other end is connected to the carbon fiber rod of the fourth layer rib group.

[0012] The cylindrical high thermal insulation film structure is folded and stored in a "Z" shape, and then loaded into the space formed by the carbon fiber rods of the first layer of rib groups and the ultra-thin aluminum honeycomb panels on both sides; the upper section and the lower section are both folded and stored in a "Z" shape, and then the lower section is loaded into the space formed by the carbon fiber rods of the second layer of rib groups and the ultra-thin aluminum honeycomb panels on both sides, and the upper section is loaded into the space formed by the carbon fiber rods of the third layer of rib groups and the ultra-thin aluminum honeycomb panels on both sides.

[0013] It also includes a compression release device, which is mainly used to compress the W-shaped rib assembly to bear the load of the launch section. Each W-shaped rib assembly has two compression points, a total of 12 compression points. In the launch section, the compression device applies a pre-tightening force to the W-shaped rib assembly through a rope. After reaching the predetermined track, the rope is cut off under the unlocking command to release the compression.

[0014] In summary, this application at least includes the following beneficial technical effects:

[0015] (1) The present invention adopts the technical solution of "block-type film assembly + W-shaped expandable rib assembly", which can realize the three-dimensional secondary storage and expansion of ultra-large space films, solves the current problem of three-dimensional secondary storage of film storage, and meets the requirements of high storage ratio and light weight of large-area space oblique-cut cylindrical film structure;

[0016] (2) The W-shaped expandable rib assembly adopts a four-layer drawer structure, which is composed of carbon fiber rods and ultra-thin aluminum honeycomb structure. The drawer structure can be disassembled repeatedly, which greatly improves the efficiency of repeated disassembly and assembly of the film;

[0017] (3) The membranes are all stored in the W-shaped expandable rib assembly. In the first step, the W-shaped rib assembly is expanded circumferentially to form a hexagon. In the second step, the W-shaped rib is longitudinally expanded under the drive of the expansion arm, thereby realizing the three-dimensional secondary expansion of the membrane structure.

[0018] (4) The circumferentially deployable sunshade is based on the Miura origami unit and the "Z"-shaped origami unit. The driving element, the inner constraint frame and the outer constraint frame are comprehensively considered to design the Miura origami unit with a large vertex angle.

[0019] (5) The layers of the multi-layer rib group in the present invention are positioned by wedges, and the hinges in each single-layer W-shaped rib are designed with rope linkage. The wedge positioning and rope linkage ensure the orderliness of the rib assembly deployment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the unfolded state of the space film folding and storing mechanism of the present invention;

[0021] Figure 2 It is a schematic diagram of the folded state of the high-space film folding and storing mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the W-shaped expandable rib assembly of the present invention in a folded state;

[0023] Figure 4 It is a schematic diagram of the connection between the film assembly and the rib assembly of the present invention;

[0024] Figure 5 This is a schematic diagram of a layer of W-shaped expandable rib assembly of the present invention;

[0025] Figure 6 It is a schematic diagram of the Miura folding and "Z" folding states of the circumferentially deployable sunshade screen of the present invention;

[0026] Figure 7 It is a schematic diagram of the circumferentially deployable sunshade Miura and the folding line of the "Z" shape folding of the present invention;

[0027] Figure 8 This is a schematic diagram of the wedge-shaped positioning between the multi-layer rib groups of the present invention;

[0028] Fig. 9 A schematic diagram of the rope linkage of the W-star deployable rib assembly of the present invention;

[0029] Fig.10 It is a schematic diagram of the compression and release device of the present invention.

[0030] Among them: 1. Circumferentially deployable sunshade; 2. Cylindrical high-insulation film structure; 3. Oblique-cut wave-transparent film structure; 4. W-shaped deployable rib assembly; 5. Linear extension mechanism; 7. Compression release device;

[0031] 8. First layer rib group; 9. Second layer rib group; 10. Third layer rib group; 11. Fourth layer rib group; 12. Root hinge; 13. Inter-rod hinge; 14. Removable storage carbon fiber frame; 15. Compression rope. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] The present application embodiment discloses a three-dimensional secondary space film folding and storage mechanism, such as Figure 1 and Figure 2 As shown, after unfolding, the film is in the shape of an obliquely cut hexagonal prism, including a film component, a W-shaped expandable rib component 4, a linear stretching mechanism 5 and a compression release device 7.

[0034] like Fig.10 As shown, each W-shaped deployable rib assembly 4 has two compression release devices 7, and there are a total of 12 compression release devices 7. In the launch section, the compression release device 7 applies a pre-tightening force to the W-shaped deployable rib assembly 4 through a compression rope 15, and both ends of the compression rope 15 are connected to the top and bottom W-shaped deployable rib assemblies of the multiple W-shaped deployable rib assemblies arranged along the axial direction. After reaching the predetermined track, the compression rope 15 is cut off under the unlocking command, thereby realizing the unlocking and releasing of the compression release device 7.

[0035] A plurality of W-shaped expandable rib assemblies 4 form a layer, with a total of 4 layers, each layer being used for storing the film assembly after being folded, and the 4 layers of W-shaped expandable rib assemblies 4 are respectively the first layer rib group 8, the second layer rib group 9, the third layer rib group 10 and the fourth layer rib group 11 from bottom to top, the first layer rib group 8 and the second layer rib group 9 each include 6 W-shaped expandable rib assemblies 4, the third layer rib group 10 includes 3 W-shaped expandable rib assemblies 4, the fourth layer rib group 11 includes a W-shaped expandable rib assembly 4, and the fourth layer rib group 11 is located directly above a W-shaped expandable rib assembly 4 in the middle of the third layer rib group 10.

[0036] like Figure 5As shown, it is a schematic diagram of a (one layer) W-shaped expandable rib assembly 4, and a W-shaped expandable rib assembly 4 includes two root hinges 12, three inter-rod hinges 13 and four detachable storage carbon fiber frames 14. Each detachable storage carbon fiber frame 14 includes a carbon fiber rod, and optionally includes an ultra-thin aluminum honeycomb panel, and the two sides of the carbon fiber rod are each repeatedly detachably connected with an ultra-thin aluminum honeycomb panel, and the space above the carbon fiber rod and the two ultra-thin aluminum honeycomb panels is used to place the film assembly. Specifically, the carbon fiber rods of the W-shaped expandable rib assembly 4 at the top position are not installed with ultra-thin aluminum honeycomb panels, and the carbon fiber rods of other W-shaped expandable rib assemblies 4 can be removably installed with ultra-thin aluminum honeycomb panels on both sides, wherein the carbon fiber rods are threaded embedded parts, and the ultra-thin aluminum honeycomb panels are through-hole embedded parts. The two are connected by screws, and the screws are directly removed when disassembling to achieve the removability of the ultra-thin aluminum honeycomb panels; the meaning of the top position is: when there are no other W-shaped expandable rib assemblies 4 above a W-shaped expandable rib assembly 4, then the W-shaped expandable rib assembly 4 is the top position. When it is necessary to install a film assembly, remove the ultra-thin aluminum honeycomb panel on the outside, and after installing the film assembly, reinstall the ultra-thin aluminum honeycomb panel. Film assemblies are installed between two adjacent layers of W-shaped expandable rib assemblies 4, and the two ends of the film assembly are respectively connected to the carbon fiber rods of the upper W-shaped expandable rib assembly 4 and the carbon fiber rods of the lower W-shaped expandable rib assembly 4.

[0037] like Figure 5 As shown, each W-shaped expandable rib assembly 4 includes 4 carbon fiber rods, which are hinged in turn through inter-rod hinges 13, and the two ends of the 4 carbon fiber rods are connected to the root hinges, forming a W shape when folded. When unfolded, it is driven by 5 hinges, and the unfolding process is unfolded from a W shape to a shape. The hinges are linked by ropes to ensure the orderliness of the W-shaped W-shaped expandable rib assembly during the unfolding process. After each layer of the film assembly is folded, it is stored in a detachable storage carbon fiber frame 14 and unfolds as the W-shaped expandable rib assembly 4 unfolds.

[0038] The linear extension mechanism 5 includes 6 extension arms with adjustable lengths, which are parallel to each other and arranged in a hexagonal shape. The root hinges 12 at both ends of each W-shaped expandable rib assembly 4 are connected to two adjacent extension arms. The W-shaped opening sides of the 6 W-shaped expandable rib assemblies 4 face outward, and the root hinges 12 are connected to the extension arms by rotation with the axis of the extension arms as the axis. When it is necessary to expand, the root hinge 12 rotates to drive the film assembly to expand circumferentially; then, the extension arm is extended, so that the non-distance between two adjacent layers of W-shaped expandable rib assemblies 4 becomes larger, and the film assembly located between two adjacent layers of W-shaped expandable rib assemblies 4 is opened.

[0039] like Figure 3FIG. 4 is a schematic diagram of a four-layer W-shaped expandable rib assembly 4, wherein ultra-thin aluminum honeycomb panels are installed on both sides of the carbon fiber rods of the first layer rib group 8, the second layer rib group 9, and the third layer rib group 10. Ultra-thin aluminum honeycomb panels are not installed on both sides of the carbon fiber rods of the fourth layer rib group 11.

[0040] like Figure 1 As shown, the film assembly includes a circumferentially deployable sunshade screen 1, a cylindrical high-insulation film structure 2 and a beveled wave-transparent film structure 3.

[0041] The shape of the circumferentially deployable sunshade screen 1 is a flat hexagon with a hexagonal through hole in the middle, and the edge of the through hole forms the inner edge of the circumferentially deployable sunshade screen 1. The inner edge is fixed to the bottom of the cabin, and the outer edge is fixed to the bottom edge of the carbon fiber rod of the first layer of rib group 8. Figure 6 It is a schematic diagram of the folding state of the circumferentially deployable sunshade screen 1, which is composed of Miura origami units and "Z"-shaped origami units. The edge connected to the W-shaped rib assembly adopts Miura folding, and the edge connected to the extension arm adopts "Z"-shaped folding. This folding method can not only realize the orderly folding and storage of the flat film, but also ensure the coordination between the film folding and the mechanism folding. Figure 7 It is a schematic diagram of the fold design of the circumferentially deployable sunshade screen 1.

[0042] The circumferentially deployable sunshade screen 1 is located on the bottom surface of the beveled hexagonal prism, and is stored in the first layer of the W-shaped deployable rib assembly when folded and retracted. When unfolded, it is unfolded by unfolding the W-shaped deployable rib assembly, and after unfolding, a hexagonal planar annular film structure is formed under the action of the film tensioning system. There are many constraints on the folding design of the circumferentially deployable sunshade, and crease design is a difficult point. Based on the Miura origami unit and the "Z"-shaped origami unit, a Miura origami unit with a large vertex angle is designed by comprehensively considering the driving element, the internal constraint frame and the external constraint frame to reduce the unit spacing after the Miura unit is folded. A "Z"-shaped origami unit is designed at the vertex position of the outer contour hexagon. Let the creases of the two origami units naturally extend and intersect to form the final crease design.

[0043] The cylindrical high thermal insulation film structure 2 is in the shape of a cylinder, one end of the cylindrical high thermal insulation film structure 2 is connected to the carbon fiber rod of the first layer rib group 8, and the other end is connected to the carbon fiber rod of the second layer rib group 9. The cylindrical high thermal insulation film structure 2 is folded and stored in a "Z" shape. After folding, it is flipped 90° and stored in a hexagon. It is then loaded into the space formed by the carbon fiber rod of the first layer rib group 8 and the ultra-thin aluminum honeycomb panels on both sides, and is folded twice with the W-shaped expandable rib assembly 4. The cross-sectional structure of the cylindrical high thermal insulation film structure 2 after being loaded into the W-shaped expandable rib assembly 4 is as follows: Figure 4 shown.

[0044] The beveled wave-transparent membrane structure 3 adopts an upper and lower segmented design, which is divided into two parts, namely the upper section and the lower section. One end of the lower section is connected to the carbon fiber rod of the second layer rib group 9, and the other end is connected to the carbon fiber rod of the third layer rib group 10. One end of the upper section is connected to the carbon fiber rod of the third layer rib group 10, and the other end is connected to the carbon fiber rod of the fourth layer rib group 11. Both the upper section and the lower section are folded and stored in a "Z" shape, and after folding and flipping 90°, they are stored into a hexagon. The W-shaped expandable rib assembly 4 is then installed, and the W-shaped expandable rib assembly 4 is folded for the second time. The cross-sectional structures of the upper and lower sections after the W-shaped expandable rib assembly 4 is installed are as follows. Figure 4 As shown. The unfolded shape of the oblique-cut wave-transparent membrane structure is an oblique-cut columnar structure, which is located at the prism side of the oblique-cut hexagonal prism. After the membrane is folded, it is stored in the second, third and fourth layers of the W-shaped expandable rib assembly.

[0045] The present invention adopts the technical scheme of "block-type film assembly + W-shaped expandable rib assembly + film tensioning system", which can realize the three-dimensional secondary storage and expansion of ultra-large space films, solves the current problem of three-dimensional secondary storage of film storage, and meets the demand for high storage ratio of ultra-large area body film structure;

[0046] The W-shaped expandable rib assembly of the present invention adopts a four-layer drawer structure, which is composed of carbon fiber rods and ultra-thin aluminum honeycomb structure. The drawer structure can be disassembled repeatedly, which greatly improves the efficiency of repeated disassembly and assembly of the film.

[0047] The circumferentially deployable sunshade screen of the present invention is based on the Miura origami unit and the "Z"-shaped origami unit, and the Miura origami unit with a large vertex angle is designed to adapt to the configuration of the driving element, the inner constraint frame and the outer constraint frame;

[0048] The film components in the present invention are all stored in a closed W-shaped expandable rib component, which greatly saves the storage space of the film components, and the film is pulled out during the expansion process, which can effectively avoid the risk of hooking with the mechanism;

[0049] In the present invention, the layers of the multi-layer rib group are positioned by wedges, such as Figure 8 As shown, the inner and outer sides of the lower side of the upper W-shaped deployable rib assembly are provided with first inclined surfaces, and along the direction approaching the lower W-shaped deployable rib assembly, the inner and outer first inclined surfaces gradually approach each other; the inner and outer sides of the upper side of the lower W-shaped deployable rib assembly are provided with second inclined surfaces, and along the direction approaching the upper W-shaped deployable rib assembly, the inner and outer second inclined surfaces gradually move away from each other; in the folded state, the first inclined surfaces are fitted with the second inclined surfaces, and the hinges in each single-layer W-shaped rib are designed with rope linkage, such as Fig. 9 As shown, the wedge positioning and rope linkage ensure the orderly deployment process of the rib assembly.

[0050] The contents not described in detail in this application specification belong to the common knowledge of those skilled in the art.

[0051] The present application is described in detail above in conjunction with specific implementation methods and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that, without departing from the spirit and scope of the present application, a variety of equivalent replacements, modifications or improvements can be made to the technical solution of the present application and its implementation methods, all of which fall within the scope of the present application. The scope of protection of the present application shall be subject to the attached claims.

Claims

1. A three-dimensional secondary space film folding and storage mechanism, characterized in that: It comprises a film assembly, a W-shaped expandable rib assembly (4) and a linear extension mechanism (5), wherein n W-shaped expandable rib assemblies (4) form a layer of rib groups, n is a positive integer not less than 1, and a total of m layers of rib groups arranged in sequence are provided, m is a positive integer; the film assembly comprises a bottom film assembly and an upper film assembly; Each W-shaped expandable rib assembly (4) comprises a root hinge (12), an inter-rod hinge (13) and four carbon fiber rods, wherein the four carbon fiber rods are sequentially connected through three inter-rod hinges (13) to obtain a carbon fiber rod chain, and both ends of the carbon fiber rod chain are connected to the root hinge (12); The two ends of the upper membrane assembly are respectively connected to the carbon fiber rods of the two adjacent layers of rib groups, the bottom membrane assembly is connected to the carbon fiber rods of the bottom rib group, and the bottom membrane assembly is fixed to the bottom of the cabin; The linear extension mechanism (5) comprises a plurality of retractable extension arms, the root hinges (12) at both ends of each W-shaped expandable rib assembly (4) are connected to two adjacent expansion arms, and the root hinge (12) is rotatably connected to the expansion arm with the axis of the expansion arm as the axis; the rotation of the root hinge (12) drives the W-shaped expandable rib assembly (4), the expansion arm and the film assembly to expand circumferentially; the expansion arm expands, driving the distance between the two adjacent layers of rib groups to increase, and the film assembly is longitudinally expanded.

2. The three-dimensional secondary space film folding and storage mechanism according to claim 1, characterized in that: If there is another W-shaped deployable rib assembly (4) above one of the W-shaped deployable rib assemblies (4), the W-shaped deployable rib assembly (4) is located at a lower layer, and ultra-thin aluminum honeycomb panels are detachably connected to both sides of the carbon fiber rod of the W-shaped deployable rib assembly (4) at the lower layer.

3. The three-dimensional secondary space film folding and storage mechanism according to claim 1, characterized in that: Two adjacent W-shaped expandable rib assemblies (4) in the vertical direction are positioned by means of a wedge, that is, a first inclined surface is arranged on the inner side and the outer side of the lower side of the upper W-shaped expandable rib assembly, and the inner and outer first inclined surfaces gradually approach each other in the direction approaching the lower W-shaped expandable rib assembly; a second inclined surface is arranged on the inner side and the outer side of the upper side of the lower W-shaped expandable rib assembly, and the inner and outer second inclined surfaces gradually move away from each other in the direction approaching the upper W-shaped expandable rib assembly; in the folded state, the first inclined surfaces are in contact with the second inclined surfaces.

4. The three-dimensional secondary space film folding and storage mechanism according to claim 1, characterized in that: All the root hinges (12) and inter-rod hinges (13) in the first layer of rib groups are linked by ropes.

5. The three-dimensional secondary space film folding and storage mechanism according to claim 1, characterized in that: The bottom film component is a circumferentially deployable sunshade screen (1), a through hole is provided in the middle of the circumferentially deployable sunshade screen (1), the edge of the through hole forms the inner edge of the circumferentially deployable sunshade screen (1), the inner edge is fixed on the bottom of the cabin, and the outer edge is connected to the inner side of the carbon fiber rod of the bottom W-shaped deployable rib component (4); the folded state of the circumferentially deployable sunshade screen (1) is composed of Miura origami units and "Z"-shaped origami units, the part of the circumferentially deployable sunshade screen (1) located between two carbon fiber rods in the middle of the W-shaped deployable rib component (4) adopts Miura folding, and the circumferentially deployable sunshade screen (1) located between adjacent W-shaped deployable rib components (4) adopts "Z"-shaped folding.

6. The three-dimensional secondary space film folding and storage mechanism according to claim 1, characterized in that: The upper film assembly comprises a cylindrical high-insulation film structure (2) and a bevel-cut wave-transparent film structure (3), wherein the m-layer rib groups are, from bottom to top, a first-layer rib group (8), a second-layer rib group (9), a third-layer rib group (10) and a fourth-layer rib group (11), respectively; the cylindrical high-insulation film structure (2) is cylindrical in shape, one end of the cylindrical high-insulation film structure (2) is connected to the carbon fiber rod of the first-layer rib group (8), and the other end is connected to the carbon fiber rod of the second-layer rib group (9); the bevel-cut wave-transparent film structure (3) is divided into an upper section and a lower section, one end of the lower section is connected to the carbon fiber rod of the second-layer rib group (9), and the other end is connected to the carbon fiber rod of the third-layer rib group (10). One end of the upper section is connected to the carbon fiber rod of the third-layer rib group (10), and the other end is connected to the carbon fiber rod of the fourth-layer rib group (11).

7. The three-dimensional secondary space film folding and storage mechanism according to claim 6, characterized in that: The cylindrical high thermal insulation film structure (2) is folded and stored in a "Z" shape, and then loaded into the space formed by the carbon fiber rods of the first layer of rib group (8) and the ultra-thin aluminum honeycomb panels on both sides; the upper section and the lower section are both folded and stored in a "Z" shape, and then the lower section is loaded into the space formed by the carbon fiber rods of the second layer of rib group (9) and the ultra-thin aluminum honeycomb panels on both sides, and the upper section is loaded into the space formed by the carbon fiber rods of the third layer of rib group (10) and the ultra-thin aluminum honeycomb panels on both sides.

8. The three-dimensional secondary space film folding and storage mechanism according to claim 1, characterized in that: It also comprises a compression release device (7), which is used to compress the W-shaped expandable rib assembly (4) in the launching section to bear the load of the launching section, and release the compression of the W-shaped expandable rib assembly (4) after reaching the predetermined track.

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