A modular combined load-bearing structure of a rod system and a box panel

Abstract

The present invention relates to a modular combined load-bearing structure of a rod system and a box panel, which is surrounded by a rod system on the outside and is a box panel structure composed of laminated plates and cross-shaped vertical plates on the inside; it includes an upper laminated plate, a middle laminated plate, a lower laminated plate, vertical plates, a first support, a second support, rods, rod end joints, double-headed screws and angle bars; between the upper laminated plate and the middle laminated plate, and between the middle laminated plate and the lower laminated plate, multiple groups of rod systems are circumferentially and evenly distributed along the edge of the laminated plate, and the quantity is adjusted according to the load level. Each group contains a certain number of rods and is arranged in a herringbone layout. Each group of rod systems is connected to the upper and lower laminated plates through the first support, rod end joints and pin shafts, and is connected to the middle laminated plate through the second support and rod end joints; the upper laminated plate, the middle laminated plate, and the lower laminated plate are fixedly connected to the vertical plates through angle bars. The present invention meets the load-bearing and lightweight technical requirements of the main structure of a spacecraft, and while realizing the structural configuration and lightweight, improves the load-bearing reliability of the structure.

Description

Technical Field

[0001] The invention relates to a modular combined bearing structure of a rod system and a box plate, belonging to the field of aerospace. Background Art

[0002] The main load-bearing structures of aerospace vehicles mainly use load-bearing tubes, box plates and truss structures. In large aerospace vehicles, due to the large load and high rigidity requirements, load-bearing tube structures are often used, and box plate structures are used for internal equipment and tank installation. However, the external load-bearing tube has a large diameter and a larger surface area, resulting in a large structural weight, so the structural efficiency is low, which reduces the effective load capacity or makes it difficult to meet the launch weight index requirements. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and to propose a modular combined load-bearing structure of a rod system and a box plate, which replaces the function of a large-diameter external bearing cylinder through the organic combination of the rod system and the box plate, thereby improving the load-bearing efficiency.

[0004] The solution of the present invention is:

[0005] A modular combined load-bearing structure of a rod system and a box plate, which is surrounded by a rod system on the outside and has a box plate structure composed of layer plates and cross-shaped vertical plates on the inside;

[0006] It includes an upper plate, a middle plate, a lower plate, a vertical plate, a first support, a second support, a rod, a rod end joint, a double-headed screw and an angle strip;

[0007] Between the upper plate and the middle plate, and between the middle plate and the lower plate, multiple groups of bar structures are evenly distributed along the circumferential direction of the edge of the plate. The number is adjusted according to the load magnitude. Each group contains rods and is arranged in a herringbone shape. Each group of bar systems is connected to the upper and lower plates through the first support, the rod end joint, and the pin shaft, and is connected to the middle plate through the second support and the rod end joint; the upper plate, the middle plate, and the lower plate are fixedly connected to the vertical plate through angle strips.

[0008] Furthermore, the upper plate, the middle plate and the lower plate are circular plates, and the vertical plate is a square plate with multiple circular openings evenly distributed inside for carrying and installing a large propulsion system tank.

[0009] Furthermore, the rod comprises a rod body and a metal end;

[0010] The cross-section of the rod body is round or square, and the material is carbon fiber composite material. Both ends of the rod are metal ends and have internal threads.

[0011] Furthermore, during assembly, a rod end bearing is installed at one end of the rod and connected to the first support via a pin, and a double-headed screw is installed at the other end of the rod and connected to the second support.

[0012] Furthermore, the rod end bearing includes a spherical hinge to adapt to different installation angles when the rod is assembled, ensuring that the rod only transmits axial force.

[0013] Furthermore, the first support is in the shape of a rectangular parallelepiped with double-ear designs at both ends. The first support is fixedly mounted on the upper plate and the lower plate to connect the rods and transfer external loads to the rods. The middle of the first support is a square structure with an opening at the bottom, which serves as an external interface for connecting to other compartment structures.

[0014] Furthermore, the second support is fixedly installed on the middle plate and is screwed together with the embedded parts on the middle plate; the second support is a double-headed support in appearance, which is connected to the rod through a double-headed screw to transfer the load in the upper rod system to the lower rod system.

[0015] Furthermore, the upper plate is a sandwich structure, including upper and lower panels and a sandwich core in the middle, and embedded parts are arranged around the upper plate for connection with the first support.

[0016] Furthermore, the middle plate is formed by splicing four 1 / 4 circle fan-shaped sandwich plates, including upper and lower panels and a sandwich core in the middle, and a large opening is opened in the plate, through which the tank body passes;

[0017] Embedded parts are arranged around the middle plate to connect with the second support, provide lateral support for the rod structure, and improve the anti-instability ability of the rod structure.

[0018] Furthermore, the lower panel includes upper and lower panels and a sandwich core in the middle; a plurality of large openings are opened in the panel, and metal frames are embedded around the openings for carrying and installing large propulsion system tanks; embedded parts are arranged around the lower panel for connecting with the first support and transferring all loads to the launch vehicle.

[0019] Furthermore, the metal frame is circular and has a U-shaped cross section. A solid area is provided at the connection with the tank flange and threaded holes are formed for connecting the tank fixing bolts.

[0020] Furthermore, the vertical panel includes an upper panel, a lower panel and a sandwich core in the middle, and the four vertical panels are connected by angle bars to form a cross-shaped layout.

[0021] Furthermore, a reduced version with 2 layers and 16 rod configurations, or an enlarged version with 4 layers and 48 rod configurations is adopted to achieve product configurations that adapt to different task scales and load-bearing requirements through modular combination.

[0022] The beneficial effects of the present invention compared with the prior art are:

[0023] By organically combining the characteristics of lightweight and high strength of the rod system structure with the large bending stiffness and good load-bearing and installation adaptability of the box panel structure, the present invention proposes a modular combined load-bearing structure configuration of the rod system and the box panel, which meets the load-bearing and lightweight technical requirements of the main structure of the spacecraft. While realizing the structural configuration and lightweight, the load-bearing reliability of the structure is improved, and beneficial effects such as large size, large load-bearing, and light mass are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the product structure configuration;

[0025] Figure 2 is a schematic diagram of 2 groups of rod systems;

[0026] Figure 3 is a schematic diagram of the connection between the rod system and the first support;

[0027] Figure 4 is a schematic diagram of the connection between the rod system and the second support;

[0028] Figure 5 is a schematic diagram of the upper plate structure;

[0029] Figure 6 is a schematic diagram of the middle plate structure;

[0030] Figure 7 is a schematic diagram of the lower plate structure;

[0031] Figure 8 is a schematic diagram of the embedded metal frame structure of the lower plate;

[0032] Figure 9 is a schematic diagram of the structure of a single vertical plate;

[0033] Figure 10 is a schematic diagram of the connecting angle bar structure between each layer plate and vertical plate;

[0034] Figure 11 is a schematic diagram of the structure of 2 layer plate modules;

[0035] Figure 12 is a schematic diagram of the structure of 4 layer plate modules. DETAILED DESCRIPTION OF THE INVENTION

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] A modular combined load-bearing structure of a rod system and a box panel, as Figure 1 shown, is surrounded by a rod system on the outside and is a box panel structure composed of layer plates and cross-shaped vertical plates on the inside;

[0038] It includes an upper layer plate 1, a middle layer plate 2, a lower layer plate 3, a vertical plate 4, a first support 5, a second support 6, a rod member 7, a rod end joint 8, a double-headed screw 10 and an angle bar;

[0039] Between the upper plate 1 and the middle plate 2, and between the middle plate 2 and the lower plate 3, multiple groups of bar structures are evenly distributed along the circumferential direction of the plate edge, and the number is adjusted according to the load magnitude. Each group includes two rods 7, which are arranged in a herringbone shape. Each group of bar systems is connected to the upper and lower plates through the first support 5, the rod end joint 8, and the pin 9, and is connected to the middle plate through the second support 6 and the rod end joint 8; the upper plate 1, the middle plate 2, and the lower plate 3 are fixedly connected to the vertical plate 4 through angle bars

[0040] The upper plate 1, the middle plate 2 and the lower plate 3 are circular plates, and the vertical plate 4 is a square plate with multiple circular openings evenly distributed inside for carrying and installing a large propulsion system tank.

[0041] like Figure 2 As shown, the rod 7 includes a rod body 701 and a metal end 702;

[0042] The cross section of the rod body 701 is circular or square, and the material is carbon fiber composite material. Both ends of the rod are equipped with metal end caps 702 and internal threads.

[0043] During assembly, a rod end bearing 8 is installed at one end of the rod 7 and connected to the first support 5 via a pin shaft, and a double-headed screw 10 is installed at the other end of the rod 7 and connected to the second support 6.

[0044] The rod end bearing 8 includes a spherical hinge to adapt to different installation angles when the rod is assembled, ensuring that the rod only transmits axial force.

[0045] like Figure 3 As shown, the first support 5 is in the shape of a rectangular parallelepiped with double-ear designs at both ends. The first support 5 is fixedly mounted on the upper plate 1 and the lower plate 3 to connect the rods and transfer the external load to the rod 7. The middle of the first support 5 is a square structure with an opening at the bottom, which serves as an external interface for connecting with other cabin structures.

[0046] like Figure 4 As shown, the second support 6 is fixedly mounted on the middle plate 2 and screwed together with the embedded parts 204 and 205 on the middle plate 2; the second support 6 is a double-headed support in appearance, connected to the rod 7 through a double-headed screw, and transfers the load in the upper rod system to the lower rod system.

[0047] like Figure 5 As shown, the upper plate 1 is a sandwich structure, including a first upper panel 101, a first lower panel 103, a first sandwich core 102 and a first embedded part 104. There are multiple large openings in the plate for installing and fixing the tank flange. The first embedded part 104 is pre-embedded around the upper plate for connection with the first support 5.

[0048] like Figure 6As shown, the middle plate 2 is a 1 / 4 circle fan-shaped sandwich plate structure, including a second upper panel 201, a second lower panel 203, a second sandwich core 202 and a second embedded part 204. A large opening is opened in the plate for passing the tank body structure, but is not connected to the tank;

[0049] A second embedded part 204 is pre-buried outside the middle plate 2 for connecting with the second support 6 to provide lateral support for the rod 7 structure and improve the anti-instability capability of the rod system structure; the four middle plates are connected and fixed to the vertical plates through angle strips.

[0050] like Figure 7 , 8 As shown, the lower plate 3 adopts a sandwich structure, and the structure includes a third upper panel 301, a third lower panel 303, a third sandwich core 302 and embedded parts; a plurality of large openings are opened in the plate, and a metal frame 304 is embedded around the openings for carrying and installing a large propulsion system tank and dispersing the load of the large tank to prevent the sandwich plate from being damaged prematurely; a third embedded part 305 is embedded around the lower plate 3 for connecting with the first support 5 and transferring all the loads to the launch vehicle.

[0051] The metal frame is circular and has a U-shaped cross section. A solid area is provided at the connection with the tank flange and threaded holes are made for connecting the tank fixing bolts. In order to disperse the tank load and transfer it to the main force transmission path, a connection interface with the fourth embedded part 404 and the first support 5 on the lower plate is provided to directly and effectively transfer the tank load and achieve efficient load-bearing.

[0052] like Figure 9 , 10 As shown, the vertical plate 4 adopts a sandwich structure, including a fourth upper panel 401, a fourth lower panel 403, a fourth sandwich 402 and a fourth embedded part 404, and the four vertical plates are connected into a cross-shaped layout through an angle bar 14;

[0053] The function of the vertical plate 4 is to connect the layer plates into an integral structure and at the same time improve the in-plane stiffness and bearing capacity of the layer plates. A fourth metal embedded part 404 is also pre-embedded in the position with severe load to diffuse the concentrated force load.

[0054] like Figure 11 , Figure 12 As shown in the figure, the product achieves an overall modular configuration by changing the number of layers and bars.

[0055] A reduced version with 2 layers and 16 rod configurations, or an enlarged version with 4 layers and 48 rod configurations can be used. Through modular combination, product configurations that adapt to different task scales and load-bearing requirements can be achieved.

[0056] By organically combining the characteristics of high strength and light weight of the rod system structure with the characteristics of large bending stiffness and good load-bearing and installation adaptability of the box panel structure, the present invention proposes a modular combined load-bearing structure configuration of the rod system and the box panel, which meets the load-bearing and lightweight technical requirements of the main structure of the spacecraft. While realizing the structural configuration and lightweight, it improves the load-bearing reliability of the structure and achieves beneficial effects such as large size, large load-bearing, and light mass.

[0057] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A modular combined load-bearing structure of a rod system and a box board, characterized in that, The exterior is surrounded by a bar system, and the interior is a box-plate structure consisting of layer plates and cross-shaped vertical plates; It comprises an upper plate (1), a middle plate (2), a lower plate (3), a vertical plate (4), a first support (5), a second support (6), a rod (7), a rod end joint (8), a double-headed screw (10) and an angle strip; Between the upper plate (1) and the middle plate (2), and between the middle plate (2) and the lower plate (3), multiple groups of bar system structures are evenly distributed along the circumferential direction of the plate edges, and the number is adjusted according to the load magnitude, each group comprises two bars (7) arranged in a herringbone shape, each group of bar system is connected to the upper and lower plates via a first support (5), a bar end joint (8), and a pin (9), and is connected to the middle plate via a second support (6) and a bar end joint (8); the upper plate (1), the middle plate (2), and the lower plate (3) are fixedly connected to the vertical plate (4) via angle bars; The rod (7) comprises a rod body (701) and a metal end head (702); the cross section of the rod body (701) is circular or square and made of carbon fiber composite material; both ends of the rod adopt metal end heads (702) and are internally threaded; during assembly, a rod end joint (8) is installed at one end of the rod (7) and connected to the first support (5) via a pin shaft, and a double-headed screw (10) is installed at the other end of the rod (7) and connected to the second support (6); the rod end joint (8) comprises a spherical hinge to adapt to different installation angles during assembly of the rod, thereby ensuring that the rod only transmits axial force; The second support (6) is fixedly mounted on the middle plate (2) and is screwed together with the embedded parts (204) and (205) on the middle plate (2); the second support (6) is a double-headed support in appearance and is connected to the rod (7) via a double-headed screw to transfer the load in the upper rod system to the lower rod system.

2. The modular combined load-bearing structure of a rod system and a box board according to claim 1, characterized in that, The upper plate (1), the middle plate (2) and the lower plate (3) are circular plates, and the vertical plate (4) is a square plate with a plurality of circular openings evenly distributed inside for carrying and installing a large propulsion system tank.

3. The modular combined load-bearing structure of a rod system and a box board according to claim 1, wherein The first support (5) is in the shape of a rectangular parallelepiped, with two ends being designed as double-ear pieces. The first support (5) is fixedly mounted on the upper plate (1) and the lower plate (3) and is used to connect the rods and transfer external loads to the rods (7). The middle of the first support (5) is a square structure with an opening at the bottom, which serves as an external interface for connection with other cabin structures.

4. A rod system and box board modular combined load-bearing structure according to claim 1, characterized in that, The upper plate is a sandwich structure, comprising upper and lower panels and a sandwich core in the middle. Embedded parts are arranged around the upper plate for connection with the first support (5).

5. A rod system and box board modular combined load-bearing structure according to claim 1, characterized in that, The middle plate (2) is formed by splicing four 1 / 4 circle fan-shaped sandwich plates, including upper and lower panels and a sandwich core in the middle. An opening is opened in the plate, and the tank body passes through the opening; Embedded parts are arranged around the middle plate (2) and are used to connect with the second support (6) to provide lateral support for the rod (7) structure, thereby improving the anti-instability capability of the rod system structure.

6. The modular combined load-bearing structure of a rod system and a box board according to claim 1, characterized in that The lower plate (3) comprises an upper and lower panel and a sandwich core in the middle; a plurality of openings are opened in the plate, and metal frames (304) are pre-buried around the openings for carrying and installing a large propulsion system tank; Embedded parts are arranged around the lower plate (3) and are used to connect with the first support (5) and transfer the entire load to the launch vehicle.

7. The modular combined load-bearing structure of a rod system and a box board according to claim 6, characterized in that, The metal frame is circular with a U-shaped cross-section. A solid area is provided at the connection with the storage tank flange and threaded holes are made for connecting the fixing bolts of the storage tank.

8. A rod system and box board modular combined load-bearing structure according to claim 1, characterized in that, The vertical plate (4) includes upper and lower panels and a sandwich core in the middle. Four vertical plates are connected into a cross-shaped layout through angle bars.

9. A rod system and box board modular combined load-bearing structure according to claim 1, characterized in that A scaled-down version with 2 laminates and 16 sets of rod systems, or a scaled-up version with 4 laminates and 48 sets of rod systems, is adopted. The product configuration suitable for different task scales and load-bearing requirements is realized through modular combination.

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