A large space truss structure suitable for on-orbit assembly

Abstract

The present application relates to the field of large space truss structure, and particularly relates to a large space truss structure suitable for on-orbit assembly, comprising a plurality of horizontal truss rods, vertical truss rods and inclined truss rods, a horizontal connecting assembly for connecting the horizontal truss rods is arranged between adjacent horizontal truss rods, a vertical connecting assembly for connecting the vertical truss rods is arranged between adjacent vertical truss rods, and an inclined connecting assembly for connecting the inclination of the truss rod is arranged at both ends of the inclined truss rod; the plurality of horizontal truss rods, vertical truss rods and inclined truss rods are spliced and combined into trusses of different structures at any angle through the horizontal connecting assembly, the vertical connecting assembly and the inclined connecting assembly. The present application has a perfect structure, and through the design of various connecting assemblies, the quick connection and disassembly of different truss connecting rods are realized, the assembly of trusses of different structures is facilitated, the maintenance of the truss in the later period is facilitated, and the on-orbit assembly and in-situ manufacturing of the truss structure are facilitated.

Description

Technical Field

[0001] This invention relates to the field of large space truss structures, and more specifically to a large space truss structure suitable for on-orbit assembly. Background Technology

[0002] As space exploration missions become more advanced and complex, the demand for large-scale space structures is increasing. These structures not only need to have sufficient strength and stiffness to withstand various loads in the space environment, but also need to be highly modular and scalable to adapt to different mission requirements and on-orbit environments.

[0003] Existing large-scale space truss structures, through their high-strength and high-rigidity structural systems, effectively meet these requirements and have become an important component of space exploration missions. However, existing truss structures often use welding for connection, which is inconvenient for rapid installation, disassembly, and subsequent maintenance. Summary of the Invention

[0004] To address the aforementioned issues, this invention discloses a large-scale space truss structure suitable for on-orbit assembly. Through the design of connecting components, it enables rapid connection and disassembly of different truss links, facilitating the assembly of trusses with different structures and subsequent maintenance of the trusses. Furthermore, the truss structure is manufactured using composite material additive manufacturing technology, which facilitates on-orbit assembly and in-situ manufacturing of the truss structure.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a large space truss structure suitable for on-orbit assembly, comprising several horizontal trusses, vertical trusses and inclined trusses, wherein a horizontal connecting component for connecting the horizontal trusses is provided between adjacent horizontal trusses, a vertical connecting component for connecting the vertical trusses is provided between adjacent vertical trusses, and inclined connecting components for connecting the inclined trusses are provided at both ends of the inclined trusses.

[0006] Several horizontal trusses, vertical trusses, and inclined trusses are assembled by horizontal connection components, vertical connection components, and inclined connection components to form trusses with different structures.

[0007] The technical principle of the above scheme is as follows: Several horizontal trusses in the horizontal direction are connected and fixed to each other through horizontal connecting components to form a horizontal truss frame of the required length of the truss; Several vertical trusses in the vertical direction are connected and fixed to each other through vertical connecting components to form a vertical truss frame of the required length of the truss; Vertical trusses are then connected and fixed to horizontal trusses, vertical trusses are connected to inclined trusses, and horizontal trusses are connected to inclined trusses through inclined connecting components. The horizontal trusses in the vertical and inclined directions, as well as the vertical and inclined trusses, are interlaced and spliced ​​according to the truss requirements to form a complete truss structure.

[0008] Furthermore, the horizontal connection assembly includes a fixed seat, the outer wall of which is fixedly connected to the inner wall of one end of the horizontal truss, a tapered expansion seat fixedly connected to the side wall of the fixed seat, and a threaded rod fixedly connected to the end of the expansion seat away from the fixed seat; a threaded seat is fixedly connected to the inner wall of one end of the adjacent horizontal truss, the threaded seat and the threaded rod are threadedly engaged, and several expansion rods are circumferentially fixedly connected to the end of the threaded seat near the threaded rod, and the expansion rods are all in sliding engagement with the expansion seat and the threaded rod.

[0009] The working principle is as follows: When two horizontal trusses are connected to each other, the threaded rod at one end of one horizontal truss is rotated forward and inserted into the threaded seat at one end of the other horizontal truss. At this time, the expansion seat extends into the expansion rod. Since the expansion seat is conical, the expansion rod will be deformed by the pressure of the side wall of the expansion seat as the expansion seat extends into the expansion rod. The expansion rod bends and expands in all directions, so that the outer wall of the expansion rod fits tightly against the inner wall of the horizontal truss that is wrapped around the expansion rod. The longer the distance that the threaded rod is rotated into the threaded seat, the longer the extension distance of the expansion seat, the greater the deformation of the expansion rod, and the tighter the fit between the outer wall of the expansion rod and the inner wall of the horizontal truss, the better the fixing effect.

[0010] When disassembly is required, the two horizontal trusses rotate in opposite directions, the threaded rod exits the threaded seat, the expansion seat leaves the expansion rod, the expansion rod recovers its shape after losing the compression of the expansion seat, the compression of the expansion rod on the inner wall of the horizontal truss disappears, and the two horizontal trusses can be easily disassembled.

[0011] This method allows for assembly of horizontal trusses with only relative rotation and quick disassembly with only reverse rotation.

[0012] Furthermore, the vertical connection assembly includes a threaded fixing pin, a threaded hole on the lower side wall of the vertical truss, the fixing pin and the threaded hole being threadedly engaged, a convex seat slidingly engaged inside the lower end of the vertical truss, a tapered groove on the upper side wall of the convex seat near the fixing pin, the fixing pin slidingly engaged with the tapered groove; a convex groove is formed below the convex seat, a convex block slidingly engaged inside the convex groove, several tension springs fixedly connected to the bottom of the convex seat at the middle horizontal position of the convex block; a limit groove is formed on the upper part of the convex block, a horizontal limit rod slidingly engaged vertically in the limit groove, both ends of the limit rod extending into the interior of the convex seat and fixedly connected to the convex seat; a clamping block is hinged circumferentially to the lower side wall of the convex block, a spring fixedly connected to the side of the clamping block near the convex block, and the springs fixedly connected to the convex block at the ends away from the clamping block; a T-shaped seat is fixedly connected inside the top of the adjacent vertical truss, the clamping block is detachably connected to the side wall of the T-shaped seat, and the clamping block is also slidingly engaged with the bottom of the convex seat.

[0013] The working principle is as follows: When two vertical trusses are connected to each other, the bottom of the upper vertical truss is aligned with the top of the lower vertical truss for splicing. At this time, the upper convex block is squeezed by the lower T-shaped seat and begins to move upward. The convex block moves upward in the convex groove and drives the clamping block to move upward. At this time, the inner side of the top of the clamping block is squeezed by the outer side of the bottom of the convex seat and rotates outward. Since the clamping block is hinged to the convex block, when the top of the clamping block rotates outward, the bottom of the clamping block will rotate inward and clamp the T-shaped seat. At this time, the fixing nail is inserted into the tapered groove through the threaded hole, so that the convex seat cannot slide, thus locking the upper and lower vertical trusses.

[0014] When it is necessary to disassemble two vertical truss rods, remove the fixing pins, move the upper vertical truss rod upwards and remove it. At this time, the convex seat loses the limiting effect of the fixing pins and the vertical truss rods, the clamping block loses the squeezing of the convex seat, and the lower part of the clamping block opens under the action of the spring. The clamping block then separates from the T-shaped seat, and the lower vertical truss rod can be easily disassembled.

[0015] This method allows for simple assembly between vertical trusses, and quick disassembly by simply removing the fixing screws.

[0016] Furthermore, the inclined connection assembly includes a clamping plate and a threaded extrusion pin. The clamping plate has a vertically formed extrusion groove that engages with the threaded extrusion pin. The clamping plate also has a transversely formed extrusion gap that divides the clamping plate into an upper clamping plate and a lower clamping plate. The upper clamping plate has a placement groove for placing horizontal and vertical trusses. The placement groove is located above the extrusion groove and is connected to it. The upper and lower clamping plates share an inclined groove for placing inclined trusses.

[0017] The working principle is as follows: Taking a horizontal truss as an example, the horizontal truss is placed in the placement slot. According to the truss requirements, the clamping plate rotates on the horizontal truss to adjust the angle of the inclined slot in the clamping plate. After adjustment, the inclined truss is inserted into the inclined slot. After insertion, the pressing pin is rotated into the pressing slot. The pressing slot and the pressing pin are threaded together. Due to the existence of the pressing gap, the pressing gap decreases, and the pressing pin pulls the upper and lower clamping plates together, reducing the diameter of the inclined slot. The sidewall of the inclined slot then presses and fixes the inclined truss. Simultaneously, since the placement slot is located above and connected to the pressing slot, the top of the pressing pin presses against the horizontal truss in the placement slot, thus fixing the horizontal truss as well. When it is necessary to disassemble the horizontal and inclined trusses, simply remove the pressing pin.

[0018] This method allows inclined trusses to be quickly connected or disassembled with other horizontal, vertical, and inclined trusses using only rotating clamps, significantly improving truss assembly efficiency.

[0019] Furthermore, the inner wall edge of the expansion rod near the expansion seat is inclined.

[0020] The working principle is as follows: This design allows the inner wall of the expansion rod to better fit the tapered expansion seat, enabling the expansion seat to enter the expansion rod more smoothly, reducing resistance during assembly and preventing jamming. This improves the assembly efficiency of the truss and reduces the risk of connection failure due to improper assembly.

[0021] Furthermore, the inner wall of the expansion rod near the threaded seat end is provided with an arc-shaped groove.

[0022] Beneficial effects: This design allows the expansion rod to deform more effectively when the expansion seat enters its interior, resulting in better fixation of the horizontal strut. Since the expansion rod needs to deform under stress, the section with the arc-shaped groove is more flexible than other parts. This design allows most of the force on the expansion rod to be transferred to the more flexible section, reducing the likelihood of breakage and thus improving the connection and fixation.

[0023] Furthermore, the outer edge of the bottom outer wall of the convex seat is inclined.

[0024] The working principle is as follows: the inclined outer wall of the convex seat can more evenly distribute the contact stress when squeezing the clamping block, allowing the clamping block to rotate more smoothly. At the same time, this design also reduces wear between the clamping block and the convex seat due to relative movement; this helps to extend the service life of the clamping block and the convex seat and reduces the risk of performance degradation due to wear.

[0025] Furthermore, the T-shaped seat has a flexible layer fixedly connected to the side wall sleeve.

[0026] The working principle is as follows: When the clamping block clamps the side wall of the T-shaped seat, the presence of the flexible layer can significantly reduce the scratches caused by the sharp parts of the clamping block to the side wall of the T-shaped seat and the wear on the clamping block. At the same time, because the flexible layer will undergo corresponding deformation when the clamping block clamps, it fills the gap between the clamping block and the side wall of the T-shaped seat, allowing the clamping block to clamp the T-shaped seat better.

[0027] Furthermore, the bottom of the T-shaped seat has a telescopic groove, within which a double-headed electric cylinder is fixedly connected. The output shaft of the double-headed electric cylinder slides within the telescopic groove. Clamping and loosening are achieved via the output shaft of the double-headed electric cylinder; the telescopic groove merely provides space for the output shaft to move. Adjusting the distance of the output shaft adapts to different pipe diameters, thus achieving tensioning and loosening.

[0028] The working principle is as follows: This design allows the T-shaped seat to be installed inside pipes of different diameters. By simply adjusting the output distance of the output shaft of the double-headed electric cylinder, the T-shaped seat can be fixed inside pipes of different diameters, thus achieving splicing of pipes of different diameters. When the T-shaped seat needs to be disassembled, it can be disassembled simply by retracting the output shaft of the double-headed electric cylinder. In this way, the T-shaped seat can be recycled, improving splicing efficiency while reducing material costs.

[0029] Furthermore, anti-slip sleeves are fixedly connected to the end of the output shaft of the dual-head electric control cylinder that is close to the inner wall of the vertical truss.

[0030] The working principle is as follows: the anti-slip sleeve design allows the output shaft of the double-headed electric control cylinder to be more stably fixed on the inner wall of the vertical truss, thus achieving a better connection effect.

[0031] The beneficial effects of this invention are:

[0032] 1. This invention, through the design of horizontal, vertical, and inclined connecting components, allows horizontal, vertical, and inclined trusses in different directions to be flexibly spliced ​​and combined at any angle to form spatial trusses with different structures and shapes. This design greatly improves the flexibility and reconfigurability of the truss structure, enabling it to meet various spatial tasks and changing needs.

[0033] 2. The design of the connecting components in this invention makes the truss assembly process quick and easy, reducing the complexity and cost of on-orbit operation. It also facilitates later maintenance and replacement; when a part is damaged or requires an upgrade, the corresponding component can be easily and quickly disassembled and replaced, extending the service life of the overall structure.

[0034] 3. Through the design of horizontal connecting components, vertical connecting components, and inclined connecting components, this invention enables the height, width, and angle of the truss structure to be adjustable, thereby allowing the truss to adapt to the needs of various space missions, such as space station construction, space telescope support structures, solar panel brackets, or assisting astronauts in extravehicular activities, providing support points for astronauts and various equipment. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the splicing of an embodiment of the truss of the present invention.

[0036] Figure 2 This is a front sectional view of an embodiment of the horizontal connection component of the present invention.

[0037] Figure 3 This is a front sectional view of an embodiment of the vertical connection component of the present invention.

[0038] Figure 4 This is a front sectional view of an embodiment of the tilted connection component of the present invention.

[0039] Figure 5 This is a side sectional view of an embodiment of the inclined connection component of the present invention.

[0040] List of reference numerals in the attached diagram:

[0041] The components are as follows: 1. Horizontal truss; 2. Vertical truss; 3. Inclined truss; 4. Fixed seat; 5. Expansion seat; 6. Threaded rod; 7. Expansion rod; 8. Threaded seat; 9. Fixing nail; 10. Convex seat; 11. Limiting rod; 12. Convex block; 13. Tension spring; 14. Clamping block; 15. Spring; 16. T-shaped seat; 17. Double-headed electric cylinder; 18. Anti-slip sleeve; 19. Upper clamping plate; 20. Lower clamping plate; 21. Extrusion nail. Detailed Implementation

[0042] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0043] Example 1:

[0044] As attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown: A large space truss structure suitable for on-orbit assembly includes several horizontal trusses 1, vertical trusses 2 and inclined trusses 3. Horizontal connecting components for connecting the horizontal trusses 1 are provided between adjacent horizontal trusses 1, vertical connecting components for connecting the vertical trusses 2 are provided between adjacent vertical trusses 2, and inclined connecting components for connecting the inclined trusses 3 are provided at both ends of the inclined trusses 3.

[0045] Several horizontal trusses 1, vertical trusses 2, and inclined trusses 3 are assembled into trusses of different structures by horizontal connection components, vertical connection components, and inclined connection components.

[0046] The horizontal connection assembly includes a fixed seat 4, the outer wall of which is integrally formed with the inner wall of one end of the horizontal truss 1. A tapered expansion seat 5 is integrally formed on the side wall of the fixed seat 4. A threaded rod 6 is integrally formed on the end of the expansion seat 5 away from the fixed seat 4. A threaded seat 8 is integrally formed on the inner wall of the adjacent horizontal truss 1. The threaded seat 8 is threadedly engaged with the threaded rod 6. Several circumferentially arranged expansion rods 7 are integrally formed on the end of the threaded seat 8 near the threaded rod 6. The expansion rods 7 are all slidably engaged with the expansion seat 5 and the threaded rod 6.

[0047] The vertical connection assembly includes a threaded fixing pin 9, a threaded hole on the lower side wall of the vertical truss 2, the fixing pin 9 and the threaded hole are threadedly engaged, a convex seat 10 is slidably engaged inside the lower end of the vertical truss 2, a tapered groove is opened on the upper side wall of the convex seat 10 near the fixing pin 9, the fixing pin 9 is slidably engaged with the tapered groove; a convex groove is opened below the convex seat 10, a convex block 12 is slidably engaged inside the convex groove, and several tension springs 13 are fixedly bonded to the bottom of the convex seat 10 at the horizontal position of the middle of the convex block 12.

[0048] The upper part of the convex block 12 has a limiting groove, and a horizontal limiting rod 11 is vertically slidably fitted in the limiting groove. Both ends of the limiting rod 11 extend into the interior of the convex seat 10 and are fixedly bonded to the convex seat 10. A clamping block 14 is hinged to the lower side wall of the convex block 12 along its circumference. A spring 15 is fixedly bonded to the side of the clamping block 14 near the convex block 12. The end of the spring 15 away from the clamping block 14 is fixedly bonded to the convex block 12. A T-shaped seat 16 is fixedly connected to the top of the adjacent vertical truss 2 with bolts. The clamping block 14 and the T-shaped seat 16 can be detachably engaged. The clamping block 14 is also slidably fitted to the bottom of the convex seat 10.

[0049] The inclined connection assembly includes a clamping plate and a threaded extrusion pin 21. The clamping plate has a vertically formed extrusion groove that engages with the threaded extrusion pin 21. The clamping plate has a transversely formed extrusion gap that divides the clamping plate into an upper clamping plate 19 and a lower clamping plate 20. The upper clamping plate 19 has a placement groove for placing horizontal truss 1 and vertical truss 2. The placement groove is located above the extrusion groove and is connected to it. The upper clamping plate 19 and the lower clamping plate 20 have a common inclined groove for placing inclined truss 3.

[0050] The specific implementation process is as follows:

[0051] When two horizontal trusses 1 are connected to each other, the threaded rod 6 at one end of one horizontal truss 1 is rotated forward and inserted into the threaded seat 8 at one end of the other horizontal truss 1. At this time, the expansion seat 5 extends into the expansion rod 7. Since the expansion seat 5 is conical, when the expansion seat 5 extends into the expansion rod 7, the expansion rod 7 will be deformed by the pressure of the side wall of the expansion seat 5. The expansion rod 7 bends and expands in all directions, so that the outer wall of the expansion rod 7 is close to the inner wall of the horizontal truss 2 that is wrapped around the expansion rod 7. The longer the distance that the threaded rod 6 is rotated into the threaded seat 8, the longer the extension distance of the expansion seat 5, the greater the deformation of the expansion rod 7, and the tighter the outer wall of the expansion rod 7 fits with the inner wall of the horizontal truss 1, and the better the fixing effect will be.

[0052] When disassembly is required, the two horizontal trusses 1 rotate in opposite directions, the threaded rod 6 exits the threaded seat 8, the expansion seat 5 leaves the expansion rod 7, the expansion rod 7 recovers its shape after losing the compression of the expansion seat 5, the compression of the expansion rod 7 on the inner wall of the horizontal truss 1 disappears, and the two horizontal trusses 1 can be easily disassembled.

[0053] This method allows for assembly between horizontal trusses 1 with only relative rotation, and for quick disassembly with only reverse rotation.

[0054] When the two vertical trusses 2 are connected to each other, the bottom of the upper vertical truss 2 is aligned with the top of the lower vertical truss 2 for splicing. At this time, the upper convex block 12 is squeezed by the lower T-shaped seat 16 and begins to move upward. The convex block 12 moves upward in the convex groove and drives the clamping block 14 to move upward. At this time, the inner side of the top of the clamping block 14 is squeezed by the outer side of the bottom of the convex seat 10 and rotates outward towards the convex seat 10. Since the clamping block 14 is hinged to the convex block 12, when the top of the clamping block 14 rotates outward towards the convex seat 10, the bottom of the clamping block 14 will rotate inward and clamp the T-shaped seat 16. At this time, the fixing nail 9 is inserted into the tapered groove through the threaded hole. The fixing nail 9 locks the convex seat 10, so that the convex seat 10 cannot slide, thus locking the upper and lower vertical trusses 2.

[0055] When it is necessary to disassemble the two vertical truss rods 2, remove the fixing nail 9, move the upper vertical truss rod 2 upward and remove it. At this time, the convex seat 10 loses the limiting effect of the fixing nail 9 and the vertical truss rod 2, the clamping block 14 loses the squeezing of the convex seat 10, and the lower part of the clamping block 14 opens under the action of the spring 15. The clamping block 14 then separates from the T-shaped seat 16, and the lower vertical truss rod 2 can be easily disassembled.

[0056] This method allows for simple assembly between the vertical trusses 2, and quick disassembly by simply removing the fixing nails 9.

[0057] The tilting assembly can connect and fix vertical truss 2 to horizontal truss 1, vertical truss 2 to tilting truss 3, and horizontal truss 1 to tilting truss 3. For example... Figure 4 As shown, this scheme takes the horizontal truss 1 and the inclined truss 3 as an example. The horizontal truss 1 is placed in the placement groove. According to the truss requirements, the clamping plate is rotated on the horizontal truss 1 to adjust the angle of the inclined groove in the clamping plate. After adjustment, the inclined truss 3 is inserted into the inclined groove. After insertion, the pressing nail 21 is rotated into the pressing groove. The pressing nail 21 is threaded with the pressing groove. Due to the existence of the pressing gap, the pressing gap is reduced. The pressing nail 21 will pull the upper clamping plate 19 and the lower clamping plate 20 together, reducing the diameter of the inclined groove. The side wall of the inclined groove will then press and fix the inclined truss 3. At the same time, since the placement groove is located above the pressing groove and is connected, the top of the pressing nail 21 will press the horizontal truss 1 in the placement groove, thus fixing the horizontal truss 1.

[0058] When it is necessary to disassemble the horizontal truss 1 and the inclined truss 3, rotate in the opposite direction to remove the clamping nail 21. The clamping and fixing effect of the clamping nail 21 on the horizontal truss 1 disappears, and the clamping gap is restored. The clamping and fixing effect of the upper clamping plate 19 and the lower clamping plate 20 on the inclined truss 3 disappears. At this time, the horizontal truss 1 and the inclined truss 3 can be easily disassembled.

[0059] This method allows the inclined truss 3 to be quickly connected or disassembled with other horizontal trusses 1, vertical trusses 2 and inclined trusses 3 by simply rotating the compression pin 21, which greatly improves the assembly efficiency of the truss.

[0060] In this design, horizontal truss 1, vertical truss 2, inclined truss 3, horizontal connecting components, vertical connecting components, and inclined connecting components are all manufactured using composite material additive manufacturing.

[0061] This invention, through the design of horizontal, vertical, and inclined connecting components, allows horizontal trusses 1, vertical trusses 2, and inclined trusses 3 in different directions to be flexibly assembled and combined at any angle to form spatial trusses with different structures and shapes. This design greatly improves the flexibility and reconfigurability of the truss structure, enabling it to meet various spatial tasks and changing needs.

[0062] This invention, through the design of horizontal, vertical, and inclined connecting components, enables the height, width, and angle of the truss structure to be adjustable, thereby allowing the truss to adapt to the needs of various space missions, such as space station construction, space telescope support structures, solar panel brackets, or assisting astronauts in extravehicular activities, providing support points for astronauts and various equipment.

[0063] This invention, through the design of horizontal, vertical, and inclined connecting components, makes the truss assembly process quick and simple, reducing the complexity and cost of on-orbit operation. It also facilitates later maintenance and replacement; when a part of the truss is damaged or requires upgrading, the corresponding component can be easily and quickly disassembled and replaced, extending the service life of the overall structure.

[0064] This invention, through the design of horizontal, vertical, and inclined connecting components, makes the truss assembly process quick and simple, reducing the complexity and cost of on-orbit operation. It also facilitates later maintenance and replacement; when a part of the truss is damaged or requires upgrading, the corresponding component can be easily and quickly disassembled and replaced, extending the service life of the overall structure.

[0065] Example 2:

[0066] As attached Figure 2 As shown, the difference from the above embodiment is that the inner wall edge of the expansion rod 7 near the expansion seat 5 is inclined.

[0067] The specific implementation process is as follows:

[0068] When the expansion seat 5 enters the expansion rod 7, the inclined inner wall of the expansion rod 7 can better fit the tapered expansion seat 5, allowing the expansion seat 5 to enter the expansion rod 7 more smoothly, reducing resistance during assembly and preventing jamming. This improves the assembly efficiency of the truss and reduces the risk of connection failure due to improper assembly.

[0069] Example 3:

[0070] As attached Figure 2 As shown, the difference from the above embodiment is that the inner sidewall of the expansion rod 7 near the threaded seat 8 is provided with an arc-shaped groove.

[0071] The specific implementation process is as follows:

[0072] When the expansion rod 7 enters the expansion seat 5, the part of the expansion rod 7 with the arc groove is more flexible than other parts. This design allows most of the force on the expansion rod 7 to be transferred to the more flexible part of the expansion rod 7, reducing the possibility of the expansion rod 7 breaking due to force, thus allowing it to deform better and thus providing a better fixing effect on the horizontal truss 1.

[0073] Example 4:

[0074] As attached Figure 3 As shown, the difference from the above embodiment is that the bottom outer wall edge of the convex seat 10 is inclined.

[0075] The specific implementation process is as follows:

[0076] The inclined outer wall of the convex seat 10 can more evenly distribute the contact stress when pressing the clamping block 14, allowing the clamping block 14 to rotate more smoothly. At the same time, this design also reduces wear between the clamping block 14 and the convex seat 10 due to relative movement; this helps to extend the service life of the clamping block 14 and the convex seat 10 and reduces the risk of performance degradation due to wear.

[0077] Example 5:

[0078] As attached Figure 3 As shown, the difference from the above embodiment is that the T-shaped seat 16 has a flexible layer fixedly bonded to its side wall.

[0079] The specific implementation process is as follows:

[0080] When the clamping block 14 clamps the side wall of the T-shaped seat 16, the presence of the flexible layer significantly reduces the scratches caused by the sharp parts of the clamping block 14 to the side wall of the T-shaped seat 16 and the wear on the clamping block 14. At the same time, because the flexible layer will deform accordingly when the clamping block 14 is clamped, it fills the gap between the clamping block 14 and the side wall of the T-shaped seat 16, allowing the clamping block 14 to clamp the T-shaped seat 16 more effectively.

[0081] Example 6:

[0082] As attached Figure 3 As shown, the difference from the above embodiment is that the bottom of the T-shaped seat 16 has a telescopic groove, and a double-headed electric control cylinder 17 is embedded and installed in the telescopic groove. The output shaft of the double-headed electric control cylinder 17 slides in the telescopic groove, and an anti-slip sleeve 18 is fixedly bonded to one end of the output shaft of the double-headed electric control cylinder 17 near the inner wall of the vertical truss 2.

[0083] The specific implementation process is as follows:

[0084] When the T-shaped seat 16 is installed inside the vertical truss 2, the output distance of the output shaft of the double-headed electric cylinder 17 only needs to be adjusted, and the T-shaped seat 16 can be fixed inside the vertical truss 2 of different diameters, thereby realizing the splicing of vertical trusses 2 of different diameters. When it is necessary to disassemble the T-shaped seat 16, it is only necessary to retract the output shaft of the double-headed electric cylinder 17 to complete the disassembly, and then the T-shaped seat 16 can be recycled, which improves the splicing efficiency and reduces the cost of consumables.

[0085] The anti-slip sleeve 18 design allows the output shaft of the dual-head electric control cylinder 17 to be more stably fixed to the inner wall of the vertical strut 2, thus achieving a better connection effect.

[0086] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A large space truss structure suitable for on-orbit assembly, characterized in that, The structure includes several horizontal trusses (1), vertical trusses (2), and inclined trusses (3). Each adjacent horizontal truss (1) is connected by a horizontal connecting assembly, and each adjacent vertical truss (2) is connected by a vertical connecting assembly. Both ends of the inclined truss (3) are connected by inclined connecting assemblies. The horizontal trusses (1), vertical trusses (2), and inclined trusses (3) are connected horizontally, vertically, and inclinedly through the horizontal connecting assemblies, vertical connecting assemblies, and inclined connecting assemblies to form trusses with different structures. The vertical connecting assembly includes a threaded fixing pin (9). The lower sidewall of the vertical truss (2) has a threaded hole, and the fixing pin (9) is threaded into the threaded hole. A convex seat (10) is slidably fitted inside the lower end of the vertical truss (2). A tapered groove is formed on the upper sidewall of the convex seat (10) near the fixing pin (9). The convex seat (10) has a convex groove at the bottom and a convex block (12) slidingly fitted inside the convex groove. Several tension springs (13) are fixedly connected to the bottom of the convex seat (10) at the middle horizontal position of the convex block (12). A limit groove is opened at the upper part of the convex block (12). A horizontal limit rod (11) is vertically fitted inside the limit groove. The two ends of the limit rod (11) extend into the convex seat (10) and are fixedly connected to the convex seat (10). (12) A clamping block (14) is hinged along its circumference on the lower side wall. A spring (15) is fixedly connected to the side of the clamping block (14) near the convex block (12). The end of the spring (15) away from the clamping block (14) is fixedly connected to the convex block (12). A T-shaped seat (16) is fixedly connected inside the top of the adjacent vertical truss (2). The clamping block (14) and the T-shaped seat (16) are detachably connected. The clamping block (14) is also slidably engaged with the bottom of the convex seat (10).

2. The large space truss structure suitable for on-orbit assembly according to claim 1, characterized in that, The horizontal connection assembly includes a fixed seat (4), the outer wall of the fixed seat (4) is fixedly connected to the inner wall of one end of the horizontal truss (1), a tapered expansion seat (5) is fixedly connected to the side wall of the fixed seat (4), and a threaded rod (6) is fixedly connected to the end of the expansion seat (5) away from the fixed seat (4); a threaded seat (8) is fixedly connected to the inner wall of one end of the adjacent horizontal truss (1), and the threaded seat (8) is threadedly engaged with the threaded rod (6); a number of expansion rods (7) are circumferentially fixedly connected to the end of the threaded seat (8) near the threaded rod (6), and the expansion rods (7) are all slidingly engaged with the expansion seat (5) and the threaded rod (6).

3. The large space truss structure suitable for on-orbit assembly according to claim 1, characterized in that, The inclined connection assembly includes a clamping plate and a threaded extrusion pin (21). The clamping plate has a vertically opened extrusion groove that engages with the threaded extrusion pin (21). The clamping plate has a horizontally opened extrusion gap that divides the clamping plate into an upper clamping plate (19) and a lower clamping plate (20). The upper clamping plate (19) has a placement groove for placing a horizontal truss (1) or a vertical truss (2). The placement groove is located above the extrusion groove and is connected to it. The upper clamping plate (19) and the lower clamping plate (20) have a common inclined groove for placing an inclined truss (3).

4. The large space truss structure suitable for on-orbit assembly according to claim 2, characterized in that, The inner wall edge of the expansion rod (7) near the expansion seat (5) is inclined.

5. The large space truss structure suitable for on-orbit assembly according to claim 2, characterized in that, The inner sidewall of the expansion rod (7) near the threaded seat (8) has an arc-shaped groove.

6. The large space truss structure suitable for on-orbit assembly according to claim 3, characterized in that, The bottom outer wall edge of the convex seat (10) is inclined.

7. The large space truss structure suitable for on-orbit assembly according to claim 3, characterized in that, The T-shaped seat (16) has a flexible layer fixed to the side wall sleeve.

8. The large space truss structure suitable for on-orbit assembly according to claim 3, characterized in that, The bottom of the T-shaped seat (16) has a telescopic groove, and a double-headed electric control cylinder (17) is fixedly connected in the telescopic groove. The output shaft of the double-headed electric control cylinder (17) slides in the telescopic groove.

9. The large space truss structure suitable for on-orbit assembly according to claim 8, characterized in that, The output shaft of the double-headed electric control cylinder (17) is fixedly connected to the end of the shaft near the inner wall of the vertical strut (2) with an anti-slip sleeve (18).

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