A foldable support fixture for the interior of a large spacecraft cabin structure

Abstract

A foldable support fixture for the interior of a large spacecraft cabin structure is disclosed. The foldable support assembly (1) includes a first folding rod (7), a second folding rod (8), and a support block (16). The central column assembly (2) includes a central column (3), a sliding support (4), a first rotating shaft (5), and a second rotating shaft (6). One end of the first folding rod (7) is rotatably connected to the second folding rod (8), and the other end is rotatably connected to the second rotating shaft (6) on the sliding support (4). The upper end of the second folding rod (8) is fitted with the support block (16), and the lower end is rotatably connected to the first rotating shaft (5). The first rotating shaft (5) is installed at the end of the central column (3), and the sliding support (4) is fitted onto the central column (3) through its hollow hole, sliding on the central column (3) to allow the foldable support assembly (1) to open or close. This invention unfolds after entering the cabin, providing support at specific locations and ensuring stability during operation on the surface of the large cabin structure.

Description

Technical Field

[0001] This invention belongs to the field of mechanical device technology, and specifically relates to a foldable support fixture for the interior of a large spacecraft cabin structure, used for internal support of the cabin during machining, welding and other processing of the cabin surface after the large spacecraft cabin structure is sealed. Technical Background

[0002] Due to limitations in rocket carrying capacity, large spacecraft employ lightweight design structures, characterized by large dimensions, thin walls, and low rigidity. The development process for large spacecraft structures includes machining processes such as turning, milling, and grinding, as well as techniques like circumferential welding and partial weld repair welding. Generally, original parts formed by roll bending, creep forming, or machining are joined together by welding to ultimately form a complete cabin structure. Because large spacecraft structures have sealing requirements, after final assembly, the cabin is often completely sealed except for a small-diameter manhole / interface flange. Figure 1 As shown.

[0003] Because large spacecraft cabins have weak structural rigidity, when welding the last weld, machining / grinding the outer surface supports / interfaces of the cabin after sealing, or repairing local welds, it is necessary to support the cabin inside the operating position of the cabin structure to avoid welding defects and poor processing accuracy caused by vibration of the large spacecraft cabin structure during operation. Summary of the Invention

[0004] In response, this invention proposes a foldable support fixture for the internal structure of a large spacecraft cabin, which solves the technical problem of internal support during welding, processing, and repair operations after the large spacecraft cabin structure is sealed, thereby improving the rigidity of the cabin structure and avoiding problems such as welding defects and poor processing accuracy caused by vibration of the large spacecraft cabin structure during operation.

[0005] This invention proposes a foldable support fixture for the interior of a large spacecraft cabin structure, comprising: a foldable support assembly and a central column assembly; wherein, the foldable support assembly includes a first folding rod, a second folding rod, a support block, and a third rotating shaft; the central column assembly includes: a central column, a sliding support, a first rotating shaft, and a second rotating shaft; the first rotating shaft is installed at the end of the central column, and the second rotating shaft is installed on the sliding support; the third rotating shaft is installed in the middle of the second folding rod; the sliding support is fitted onto the central column through its own hollow hole and can slide on the central column; one end of the first folding rod is rotatably connected to the second folding rod via the third rotating shaft, and the other end is rotatably connected to the second rotating shaft of the sliding support; one end of the second folding rod is fitted with a support block, and the other end is rotatably connected to the first rotating shaft; the first rotating shaft is installed at the end of the central column, and the sliding support is fitted onto the central column through its own hollow hole and can slide on the central column, allowing the foldable support assembly to open or close.

[0006] Furthermore, the supporting components also include a fourth rotating shaft, a fifth rotating shaft, a sixth rotating shaft, a first joint, a second joint, a telescopic cylinder, and a support block; among which,

[0007] The fourth pivot is installed on the upper end of the second folding rod, the first joint is installed on the fourth pivot, the fifth pivot is installed on the top of the fourth pivot, the second joint is installed on the top of the fifth pivot, the sixth pivot is installed on the second joint, the telescopic cylinder is installed on the sixth pivot, and the support block is installed on the top of the telescopic cylinder.

[0008] The first and second folding rods can rotate around the third pivot, the second folding rod and the first joint can rotate around the fourth pivot, the first and second joints can rotate around the fifth pivot, and the support block and the second joint can rotate around the sixth pivot.

[0009] Furthermore, the telescopic cylinder can extend or retract. When the telescopic cylinder extends, it pushes the support block outward to fit into the cabin structure. When the telescopic cylinder retracts, it retracts the support block inward to detach it from the cabin structure.

[0010] Furthermore, when the sliding support on the central column assembly moves away from the first pivot axis on the foldable support assembly along the central column axis, the two ends of the first folding rod rotate around the second and third pivot axes respectively, and the angle between the first folding rod and the central column decreases. The first folding rod pulls the second folding rod, which rotates around the first pivot axis, causing the angle between the second folding rod and the central column to decrease, and the second folding rod folds up. The movement of the second folding rod around the first pivot axis simultaneously drives the first joint, the second joint, and the support block to move, which reduces the distance between the support block and the central column, thus achieving the folding up of the support block. While the second folding rod folds up in the above process, the first joint rotates around the fourth pivot axis, the second joint rotates around the fifth pivot axis, and the support block rotates around the sixth pivot axis.

[0011] Furthermore, the sliding support of the central column assembly moves along the central column towards the foldable assembly, causing the two ends of the folding rod to rotate around the third and second rotating axes respectively. At the same time, the first folding rod pushes the second folding rod to rotate around the first rotating axis, increasing the angle between the second folding rod and the central column until the second folding rod is perpendicular to the central column. While the sliding support moves along the central column towards the foldable assembly, the second joint rotates around the fifth rotating axis until the sixth rotating axis is parallel to the axis of the fourth rotating axis. Simultaneously, the support block rotates around the sixth rotating axis until the axis of the telescopic cylinder is perpendicular to the axis of the central column. Subsequently, the second joint rotates around the fifth rotating axis until the sixth rotating axis is perpendicular to the axis of the fourth rotating axis. The telescopic cylinder extends, and the support block contacts the supported cabin.

[0012] Furthermore, there can be multiple sets of folding support components. The folding rod in the folding support component is installed on the first rotating shaft of the central shaft component, and the folding rod in the folding support component is installed on the second rotating shaft of the central shaft component. Each central column component can be provided with one or more pairs of first rotating shafts and second rotating shafts. Each pair of first rotating shafts and second rotating shafts can be provided with one folding support component, and all the first rotating shafts and second rotating shafts are centrally symmetrically distributed with respect to the axis of the central column.

[0013] Furthermore, the telescopic cylinder can be driven by a mechanical structure, a pneumatic structure, or a hydraulic structure.

[0014] Furthermore, the foldable support tooling is made of steel or aluminum alloy.

[0015] Furthermore, the shape of the support surface of the support block is the same as the shape of the support position of the spacecraft cabin structure it supports.

[0016] Furthermore, the outer contour of the support block is arc-shaped.

[0017] The advantages of this invention compared to the prior art are as follows: After folding, this tooling can be extended into the cabin through the manhole / interface flange of the large spacecraft cabin structure. After entering the cabin, it can be unfolded and supported at specific positions, which can ensure the stability of the large cabin structure surface during operation and ensure the smooth completion of the operation process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a large spacecraft cabin.

[0019] Figure 2 This indicates the main structure of the foldable support tooling in this invention.

[0020] Figure 3 This refers to the "central column assembly" structure, which is one of the main structural components of the tooling in this invention.

[0021] Figure 4 This refers to the second component of the main structure of the tooling in this invention, namely, "the foldable support component".

[0022] Figure 5 This diagram illustrates the degrees of freedom of the foldable support component in this invention.

[0023] Figure 6 This is a schematic diagram illustrating a full-circle support method described in this invention.

[0024] Figure 7 This diagram illustrates different point-support methods described in this invention. Detailed Implementation

[0025] The main structure of the foldable support tooling of the present invention is as follows: Figure 2 As shown, the foldable support fixture for the internal structure of a large spacecraft cabin of the present invention includes a foldable support assembly 1 and a central column assembly 2. The central column assembly 2 and the foldable support assembly 1 are respectively as shown in the figures below. Figure 3 and Figure 4 As shown.

[0026] The foldable support assembly 1 includes a first folding rod 7, a second folding rod 8, a support block 16, and a third pivot 9.

[0027] The central column assembly 2 includes: a central column 3, a sliding support 4, a first rotating shaft 5, and a second rotating shaft 6.

[0028] The first rotating shaft 5 is installed at the end of the central column 3, the second rotating shaft 6 is installed on the sliding support 4, the third rotating shaft 9 is installed in the middle of the second folding rod 8, and the sliding support 4 is sleeved on the central column 3 through its own hollow hole, and can slide on the central column 3.

[0029] One end of the first folding rod 7 is rotatably connected to the second folding rod 8 via a third rotating shaft 9, and the other end is rotatably connected to the second rotating shaft 6 of the sliding support 4; one end of the second folding rod 8 is equipped with a support block 16, and the other end is rotatably connected to the first rotating shaft 5.

[0030] The sliding support 4 is fitted onto the central column 3 through its hollow hole, and can slide on the central column 3, so that the foldable support assembly 1 can be opened or closed.

[0031] Specifically, the central column assembly 2 comprises a central column 3, a sliding support 4, a first rotating shaft 5, and a second rotating shaft 6. The sliding support 4 has a hollow hole through which the central column 3 is fitted, allowing the sliding support 4 to slide along the axis of the central column 3. The first rotating shaft 5 is mounted on the end of the central column 3, and the second rotating shaft 6 is mounted on the sliding support 4. The number of each can be one or more. The number of the first rotating shaft 5 and the second rotating shaft 6 is not less than the number of foldable support assemblies 1 installed.

[0032] The foldable support assembly 1 includes a first folding rod 7, a second folding rod 8, a third pivot 9, a fourth pivot 10, a fifth pivot 11, a sixth pivot 12, a first joint 13, a second joint 14, a telescopic cylinder 15, and a support block 16. The fourth pivot 10 is mounted on the upper end of the second folding rod 8, the first joint 13 is mounted on the fourth pivot 10, the fifth pivot 11 is mounted on the top of the fourth pivot 10, the second joint 14 is mounted on the top of the fifth pivot 11, the sixth pivot 12 is mounted on the second joint 14, the telescopic cylinder 15 is mounted on the sixth pivot 12, and the support block 16 is mounted on the top of the telescopic cylinder 15. The first folding rod 7 and the second folding rod 8 can rotate about the third pivot 9, the second folding rod 8 and the first joint 13 can rotate about the fourth pivot 10, the first joint 13 and the second joint 14 can rotate about the fifth pivot 11, and the support block 16 and the second joint 14 can rotate about the sixth pivot 12. One end of the support block 16 is equipped with a telescopic cylinder 15, and the other end of the telescopic cylinder 15 is connected to the second joint 14. The telescopic cylinder 15 can extend or retract, enabling the support block 16 to be pushed outward to fit against the cabin structure or to be retracted inward to detach from the cabin structure. The outer contour of the support block 16 is preferably arc-shaped.

[0033] As mentioned above, the foldable support assembly has six axes of rotation, thus possessing multiple degrees of freedom. Each component can be adjusted in different combinations of motion to achieve variations in the foldable assembly's outline or envelope size. Its degrees of freedom are as follows: Figure 5 As shown in (a)-(g). Through the coordinated movement of six axes, the foldable support assembly can be unfolded (the unfolded state is as shown in the diagram). Figure 5 (f) and the collapse function (collapsed state as shown in the image) Figure 5 (h) is shown.

[0034] The retraction process is as follows: The retraction cylinder 15 first shortens to allow the folding rod 8 to fold inward. When the sliding support 4 on the central column assembly 2 moves away from the pivot 5 on the foldable support assembly 1 along the axis of the central column 3, the two ends of the first folding rod 7 rotate around the second pivot 6 and the third pivot 9, respectively, and the angle between the first folding rod 7 and the central column 3 decreases. The first folding rod 7 pulls the second folding rod 8, which rotates around the first pivot 5, causing the angle between the second folding rod 8 and the central column 3 to decrease, thus retracting the second folding rod 8. The movement of the second folding rod 8 around the first pivot 5 simultaneously drives the first joint 13, the second joint 14, and the support block 16 to move, thereby reducing the distance between the support block 16 and the central column 3 and achieving the retraction of the support block 16. While the second folding rod 8 is retracted according to the above process, the first joint 13 rotates around the fourth pivot 10, the second joint 14 rotates around the fifth pivot 11, and the support block 16 rotates around the sixth pivot 12, thereby changing the spatial posture of the support block 16 and reducing the envelope size of the foldable support assembly 1. In summary, through the movement of the sliding support 4, the synchronous movement of the first joint 13 rotating around the fourth pivot 10, the second joint 14 rotating around the fifth pivot 11, and the support block 16 rotating around the pivot 12, the retraction of the foldable support assembly is achieved. The retraction process is as follows: Figure 5 As shown in (f)-(h), the state after the gathering is complete is as follows: Figure 5 As shown in (h).

[0035] Explanation of the unfolding process: The unfolded state can be as follows Figure 5 As shown in (f), the sliding support 4 of the central column assembly 2 moves along the central column 3 towards the foldable assembly 1, causing the two ends of the folding rod 7 to rotate around the third pivot 9 and the second pivot 6 respectively. Simultaneously, the first folding rod 7 pushes the second folding rod 8 to rotate around the pivot 5, increasing the angle between the second folding rod 8 and the central column 3 until the second folding rod 8 is perpendicular to the central column 3. While the sliding support 4 moves along the central column 3 towards the foldable assembly 1, the second joint 14 rotates around the fifth pivot 11 until the sixth pivot 12 is parallel to the axis of the fourth pivot 10. Simultaneously, the support block 16 rotates around the sixth pivot 12 until the axis of the telescopic cylinder 15 is perpendicular to the axis of the central column 3. Subsequently, the second joint 14 rotates around the fifth pivot 11 until the sixth pivot 12 is perpendicular to the axis of the fourth pivot 10. Finally, the telescopic cylinder 16 extends, and the support block 16 contacts the supported cabin.

[0036] The foldable support assembly comprises multiple sets. The number of foldable support assemblies can be set to one or more sets without interfering with each other, depending on the hull support requirements. The arrangement can be symmetrical or irregular. For example, the folding rod 8 in the foldable support assembly is installed on the first rotating shaft 5 of the central shaft assembly, and the folding rod 7 in the foldable support assembly is installed on the second rotating shaft 6 of the central shaft assembly. Each central column assembly 3 can be provided with one or more pairs of first rotating shafts 5 and second rotating shafts 6. Each pair of first rotating shafts 5 and second rotating shafts 6 can be provided with one foldable support assembly, and all the first rotating shafts 5 and second rotating shafts 6 are centrally symmetrically distributed with respect to the axis of the central column 3.

[0037] Example

[0038] Figure 6 The process for using six sets of foldable support components to support the final sealing weld of a large spacecraft cabin structure involves first folding the six sets of foldable support components outside the cabin, then inserting the entire fixture into the cabin through the manhole flange, and finally unfolding the six sets of foldable support components inside the cabin. After being translated and finely adjusted to the required support position, the telescopic cylinder 15 extends, and the six support blocks 16 provide full support around the back of the cabin weld. The foldable support fixture can be made of steel or aluminum alloy.

[0039] In this invention, the sliding motion of the sliding support 4, the rotational motion of the first joint 13, the second joint 14, and the support block 16 around the fourth rotating axis 10, the fifth rotating axis 11, and the sixth rotating axis 12 respectively, and the telescopic motion of the telescopic cylinder 15 can be driven by a mechanical structure, a pneumatic structure, or a hydraulic structure. The foldable support assembly installed on the central column assembly in this invention can be one or more sets. Figure 7 (a) and Figure 7 (b) Schematic diagrams showing two states: one with 1 set of foldable support components installed and the other with 6 sets of foldable support components installed.

[0040] The shape and structure of the support block 16 in this invention can be changed according to different support requirements. The shape of the support surface of the support block 16 is the same as the shape of the support position of the spacecraft cabin structure it supports. For example, the outer contour of the support block 16 is arc-shaped.

Claims

1. A foldable support fixture for the interior of a large spacecraft cabin structure, characterized in that, include: Foldable support assembly (1), central column assembly (2); wherein, The foldable support assembly (1) includes a first folding rod (7), a second folding rod (8), a support block (16), and a third pivot (9). The central column assembly (2) includes: a central column (3), a sliding support (4), a first rotating shaft (5), and a second rotating shaft (6); The first rotating shaft (5) is installed at the end of the central column (3), and the second rotating shaft (6) is installed on the sliding support (4); the third rotating shaft (9) is installed in the middle of the second folding rod (8); the sliding support (4) is sleeved on the central column (3) through its own hollow hole and can slide on the central column (3); one end of the first folding rod (7) is rotatably connected to the second folding rod (8) through the connection of the third rotating shaft (9), and the other end is rotatably connected to the second rotating shaft (6) of the sliding support (4); the upper end of the second folding rod (8) is equipped with a support block (16), and the lower end is rotatably connected to the first rotating shaft (5); The sliding support (4) slides on the central column (3), causing the foldable support assembly (1) to open or close; The foldable support assembly (1) also includes a fourth pivot (10), a fifth pivot (11), a sixth pivot (12), a first joint (13), a second joint (14), a telescopic cylinder (15), and a support block (16); wherein, The fourth pivot (10) is installed on the upper end of the second folding rod (8), the first joint (13) is installed on the fourth pivot (10), the fifth pivot (11) is installed on the top of the fourth pivot (10), the second joint (14) is installed on the top of the fifth pivot (11), the sixth pivot (12) is installed on the second joint (14), the telescopic cylinder (15) is installed on the sixth pivot (12), and the support block (16) is installed on the top of the telescopic cylinder (15). The first folding rod (7) and the second folding rod (8) rotate around the third pivot (9), the second folding rod (8) and the first joint (13) rotate around the fourth pivot (10), the first joint (13) and the second joint (14) rotate around the fifth pivot (11), and the support block (16) and the second joint (14) rotate around the sixth pivot (12).

2. The foldable support fixture for the internal structure of a large spacecraft cabin according to claim 1, characterized in that, The telescopic cylinder (15) can extend or shorten. When the telescopic cylinder (15) extends, it pushes the support block (16) outward to fit into the cabin structure. When the telescopic cylinder (15) shortens, it retracts the support block (16) inward to detach from the cabin structure.

3. The foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, When the sliding support (4) on the central column assembly (2) moves away from the first pivot (5) on the foldable support assembly (1) along the axis of the central column (3), the two ends of the first folding rod (7) rotate around the second pivot (6) and the third pivot (9) respectively, and the angle between the first folding rod (7) and the central column (3) will decrease. The first folding rod (7) will pull the second folding rod (8), and the second folding rod (8) will rotate around the first pivot (5), causing the angle between the second folding rod (8) and the central column (3) to decrease. The rod (8) is retracted; the movement of the second folding rod (8) around the first pivot (5) simultaneously drives the first joint (13), the second joint (14) and the support block (16) to move, thereby reducing the distance between the support block (16) and the central column (3), thus realizing the retraction of the support block (16); while the second folding rod (8) is retracted, the first joint (13) rotates around the fourth pivot (10), the second joint (14) rotates around the fifth pivot (11), and the support block (16) rotates around the sixth pivot (12).

4. The foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, The sliding support (4) of the central column assembly (2) moves along the central column (3) toward the foldable support assembly (1), causing the two ends of the first folding rod (7) to rotate around the third pivot (9) and the second pivot (6) respectively. At the same time, the first folding rod (7) will push the second folding rod (8) to rotate around the first pivot (5). The angle between the second folding rod (8) and the central column (3) increases until the second folding rod (8) is perpendicular to the central column (3). As the sliding support (4) moves along the central column (3) toward the foldable support assembly (1)... While moving in direction, the second joint (14) rotates around the fifth pivot (11) until the sixth pivot (12) is parallel to the axis of the fourth pivot (10). At the same time, the support block (16) rotates around the sixth pivot (12) until the axis of the telescopic cylinder (15) is perpendicular to the axis of the central column (3). Then, the second joint (14) rotates around the fifth pivot (11) until the sixth pivot (12) is perpendicular to the axis of the fourth pivot (10). The telescopic cylinder (15) extends and the support block (16) comes into contact with the supported cabin.

5. The foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, The foldable support assembly (1) consists of multiple sets. The second folding rod (8) in the foldable support assembly (1) is installed on the first rotating shaft (5) of the central shaft assembly. The first folding rod (7) in the foldable support assembly (1) is installed on the second rotating shaft (6) of the central shaft assembly. Each central column (3) is provided with one or more pairs of first rotating shafts (5) and second rotating shafts (6). Each pair of first rotating shafts (5) and second rotating shafts (6) is provided with one foldable support assembly (1). All the first rotating shafts (5) and second rotating shafts (6) are centrally symmetrically distributed with respect to the axis of the central column (3).

6. The foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, The telescopic cylinder (15) is driven by a mechanical structure, a pneumatic structure, or a hydraulic structure.

7. The foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, The foldable support fixture is made of steel or aluminum alloy.

8. The foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, The shape of the support surface of the support block (16) is the same as the shape of the support position of the spacecraft cabin structure it supports.

9. A foldable support fixture for the interior of a large spacecraft cabin structure according to claim 2, characterized in that, The outer contour of the support block (16) is arc-shaped.

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