Airplane missile cabin test piece display tool

Abstract

The invention discloses an aircraft missile cabin test piece display tool in the technical field of aircraft test piece tools. The four support bodies which are symmetrically distributed are adopted, a stable frame is formed through the mounting plate, the angle steel, the first supporting plate and the second supporting plate, and multifunctional adjustment is achieved in cooperation with the folding assembly, the transmission assembly and the limiting assembly; spiral lifting of the lifting rod and transverse displacement of the support body are synchronously controlled through single power input, cooperative work with the first supporting plate and the second supporting plate is achieved, and state conversion can be completed only by rotating the rotating disc; and secondly, the quick locking or releasing function is achieved through the design of the clamping supporting frame and the screw connecting supporting shaft, operation can be achieved by one person, the size is reduced after the tool is folded, weight distribution is balanced, moving is convenient, and the dual advantages of heavy equipment stability and light device convenience are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft test piece tooling, and particularly relates to an aircraft bomb bay test piece display tooling. Background Art

[0002] During the aircraft model test stage, different test toolings need to be manufactured for model assembly tests or model support frames need to be made for convenient model display. During the aircraft model test stage, due to the large differences in the structural dimensions, aerodynamic shapes, and test requirements of different aircraft models, firstly, the specialization degree of the test tooling is too high. The wing assembly tooling of a certain type of passenger aircraft often cannot be compatible with other models, and even the modification of the same series of aircraft may require a redesigned support structure. According to statistics, the annual investment of aviation manufacturing enterprises in tooling development accounts for about 15% of the total R & D cost; secondly, the physical size is huge, especially for full-scale test tooling. For example, the wing test stand of a certain type of wide-body passenger aircraft is dozens of meters long and requires dedicated storage space. Thirdly, the function expansion ability is poor. Existing toolings are mostly designed for a single test scenario. For example, it is difficult for a static test tooling to be quickly converted into a fatigue test configuration.

[0003] However, there are some problems in the existing technology: due to the strong specialization caused by aircraft model differences, and the toolings generally adopt fixed rigid structures, they still occupy the complete space when idle, and the storage utilization rate is extremely low. Moreover, the toolings are large in volume and difficult to transport, and a large amount of reinstallation time is required during switching, seriously affecting the test efficiency. Therefore, we propose an aircraft bomb bay test piece display tooling. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the present invention provides an aircraft bomb bay test piece display tooling.

[0005] The purpose of the present invention is achieved as follows: An aircraft bomb bay test piece display tooling includes four symmetrically distributed support bodies. An installation plate is fixedly connected between the support bodies. Angle steels are fixedly connected to the support bodies. A first support plate is arranged between the support bodies. A second support plate is arranged between the support bodies. The first support plate and the second support plate are hinged. A support frame is clamped on the first support plate. A folding assembly is arranged between the first support plate and the installation plate. A transmission assembly is arranged between the support bodies. A telescopic rod is arranged between the angle steel and the support body. Universal wheels are arranged at the lower end of the support body. Support feet are arranged at the lower end of the support body. A limiting assembly is arranged between the second support plate and the support body. A folding plate is arranged between the support bodies.

[0006] Optionally, a connecting plate is fixedly connected to the lower end of the first support plate. The connecting plate is rotatably connected to the support body. A support shaft is fixedly connected to the second support plate. The support shaft is rotatably connected to the support body.

[0007] Optionally, the folding assembly includes a lifting rod, a threaded rod, and a coupling shaft. The lifting rod is threadedly connected to the threaded rod. The lifting rod is rotatably connected to the first support plate. The threaded rod is connected to the coupling shaft through a universal coupling. A housing is provided at the connection between the threaded rod and the coupling shaft. The housing is rotatably connected to the mounting plate.

[0008] Optionally, the transmission assembly includes a turntable. A driving wheel is fixedly connected to the turntable. A driven wheel is engaged with the driving wheel. A main shaft is fixedly connected to the driven wheel. One end of the main shaft is engaged with the coupling shaft through bevel gears. A worm is provided at the other end of the main shaft. A worm gear is engaged with the worm. A driven shaft is fixedly connected to the worm gear. A first connecting rod and a telescopic rod are provided on the driven shaft. The driven shaft is engaged with the first connecting rod through bevel gears.

[0009] Optionally, the telescopic rod includes a second connecting rod and a sleeve. The second connecting rod is threadedly connected to the sleeve. The second connecting rod is engaged with the driven shaft through bevel gears. The sleeve is fixedly connected to the angle steel.

[0010] Optionally, a knob is rotatably connected to the support leg. A toothed ring is rotatably connected inside the support leg. The knob is engaged with the toothed ring.

[0011] Optionally, a lead screw is threadedly connected to the toothed ring. The lower end of the support leg is slidably connected to a floor anchor. The floor anchor is rotatably connected to the lead screw.

[0012] Optionally, the limiting assembly includes an end cap. A toothed ring is provided on the support body. The end cap is arranged corresponding to the toothed ring. The end cap is inserted into the support shaft. A screw penetrates through the end cap. The screw is threadedly connected to the support shaft. A spring is sleeved outside the screw.

[0013] Optionally, one end of the spring contacts the support shaft, and one end of the spring contacts the end cap.

[0014] Optionally, the folding plate is rotatably connected to the support body. A sleeve plate is sleeved on the folding plate. A cross plate is inserted into the support body.

[0015] Compared with the prior art, the beneficial effects of the novel invention are as follows: By adopting a main shaft-bevel gear-worm and worm gear linkage system, the spiral lifting of the lifting rod and the lateral displacement of the support body can be synchronously controlled with a single power input, and the worm and worm gear transmission has a self-locking characteristic, ensuring the position stability under load. The lifting rod is driven to realize linear motion by rotating the threaded rod, and the first support plate is rotated to rotate the connection structure, so that the overall folding action is synchronized and coordinated. The folding and unfolding state conversion can be completed by rotating the turntable. In terms of operability, the support frame connected by the card and the support shaft connected by the screw realizes the quick locking / releasing function. A single person can complete the state switching of the support shaft by screwing a single screw. Actual tests have shown that the operation time from unfolding to fully folding of the tooling is greatly reduced, the space occupied is reduced after folding, and the weight distribution is balanced, making it easy for one person to push and transfer, so that the tooling has the dual advantages of the stability of heavy equipment and the convenience of light equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the new embodiment of the present invention or the technical solution in the prior art, the drawings required for use in the embodiment or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only new embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure provided by the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the transmission assembly provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the folding state of the tooling provided by the present invention.

[0020] Figure 4 It is a schematic diagram of the support frame structure provided by the present invention.

[0021] Figure 5 It is a schematic cross-sectional view of the support leg structure provided by the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the limit assembly provided by the present invention.

[0023] Figure 7 The present invention provides Figure 6 A magnified schematic diagram of part A.

[0024] Figure 8 It is a schematic diagram of the folding plate structure provided by the present invention.

[0025] In the figure: 1. Bracket body; 11. Mounting plate; 12. Angle steel; 13. First support plate; 14. Second support plate; 15. Support frame; 16. Connecting plate; 17. Support shaft; 18. Universal wheel; 2. Folding assembly; 21. Lifting rod; 22. Threaded rod; 23. Coupling shaft; 3. Transmission assembly; 31. Turntable; 32. Driving wheel; 33. Driven wheel; 34. Main shaft; 35. Worm; 36. Worm gear; 37. Driven shaft; 38. First connecting rod; 4. Telescopic rod; 41. Second connecting rod; 42. Sleeve; 5. Support leg; 51. Knob; 52. Tooth ring; 53. Lead screw; 54. Anchor; 6. Limiting assembly; 61. Gear ring; 62. End cover; 63. Screw; 64. Spring; 7. Folding plate; 71. Sleeve plate; 72. Cross plate. Detailed implementation manners

[0026] Next, the technical solutions in the new embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the new embodiments of the present invention. Obviously, the described embodiments are only a part of the new embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the new embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the new embodiments of the present invention.

[0027] As Figures 1 to 8 Shown is a display tooling for an aircraft bomb bay test piece, including four bracket bodies 1 symmetrically distributed. An installation plate 11 is fixedly connected between the bracket bodies 1. Angle steel 12 is fixedly connected to the bracket bodies 1. A first support plate 13 is arranged between the bracket bodies 1. A second support plate 14 is arranged between the bracket bodies 1. The first support plate 13 is hinged to the second support plate 14. A support frame 15 is clamped on the first support plate 13. A folding assembly 2 is arranged between the first support plate 13 and the installation plate 11. A transmission assembly 3 is arranged between the bracket bodies 1. A telescopic rod 4 is arranged between the angle steel 12 and the bracket bodies 1. Universal wheels 18 are arranged at the lower ends of the bracket bodies 1. Support legs 5 are arranged at the lower ends of the bracket bodies 1. A limiting assembly 6 is arranged between the second support plate 14 and the bracket bodies 1. A folding plate 7 is arranged between the bracket bodies 1.

[0028] It should be noted that the four bracket bodies 1 are symmetrically distributed at the four corners. The two bracket bodies 1 parallel to the first support plate 13 are denoted as the transverse bracket bodies 1, and the two bracket bodies 1 perpendicular to the first support plate 13 are denoted as the longitudinal bracket bodies 1. In the present invention, some mechanical connection structures and gear meshing are adopted. Since lubrication or protection structures are required between gears, shells are provided in the figures. The gear meshing is prior art, so the present invention does not elaborate on the gear meshing and the connection relationship between the shaft and the shell. The shells that are specifically described all have the functions of support and protection. Further, when the support body 1 is in the state supported by the universal wheels 18, the transmission component 3 drives the overall mechanical structure to realize the folding and contraction of the entire test tooling, so as to achieve the purpose of facilitating movement.

[0029] Further, the mounting plate 11 is fixedly connected to the support body 1 on both sides of the first support plate 13, and the mounting plate 11 is fixedly connected to the angle steels 12 on both sides to form a stable mounting platform, providing a mounting basis for the folding component 2.

[0030] Further, when the feet 5 are retracted, the height is slightly higher than that of the universal wheels 18, maintaining a height difference of 3 - 5 cm. Since the main structure of the test tooling is composed of L-shaped steel, it not only ensures the overall strength of the support frame 15 but also reduces the overall weight, making the operation intensity of lifting the feet 5 relatively low and preventing the situation of difficult operation due to the overall weight.

[0031] Specifically, a connecting plate 16 is fixedly connected to the lower end of the first support plate 13, the connecting plate 16 is rotatably connected to the support body 1, a support shaft 17 is fixedly connected to the second support plate 14, and the support shaft 17 is rotatably connected to the support body 1.

[0032] Further, both the first support plate 13 and the first support plate 13 are made by connecting two plates in parallel, and baffles are provided on both sides of the first support plate 13 and the second support plate 14 to form a card slot structure on the structure, and transverse ribs are provided in the middle part for connection to strengthen the overall structural strength and ensure the stability of the test piece placement; Further, the connecting plate 16 at the lower end of the first support plate 13 is rotatably connected to the support body 1, and an annular groove is formed on the support body 1 connected to the connecting plate 16, corresponding to the cylindrical protrusions on both sides of the connecting plate 16, playing a role of guiding and stabilizing, effectively suppressing radial movement, making the rotation of the first support plate 13 more stable. The lower end of the second support plate 14 is supported by the support shaft 17, and the second support plate 14 is fixedly connected to the support shaft 17; Further, during use, the first support plate 13 rotates around the connecting plate 16, and the connection part between the first support plate 13 and the second support plate 14 swings downward, thereby driving the second support plate 14 to swing, so that the first support plate 13 and the second support plate 14 form a folded and retracted state, reducing the occupied space volume. While ensuring the light weight of the overall structure, through multiple strengthening designs, excellent anti-torsion and anti-bending performances are achieved, fully meeting the stability requirements of the high-precision test platform.

[0033] Specifically, the limiting component 6 includes an end cap 62. A toothed ring 61 is provided on the support body 1. The end cap 62 is arranged corresponding to the toothed ring 61. The end cap 62 is inserted into the support shaft 17. A screw 63 penetrates through the end cap 62. The screw 63 is threadedly connected to the support shaft 17. A spring 64 is sleeved outside the screw 63. One end of the spring 64 contacts the support shaft 17, and one end of the spring 64 contacts the end cap 62.

[0034] Further, a square block is provided on one side of the end cap 62, corresponding to a square groove opened on the support shaft 17. And, the screw 63 penetrates through the end cap 62 and the square block. A hole is opened on the square block for placing the spring 64, ensuring that when the screw 63 is threadedly engaged with the end cap 62, it will not affect the use of the spring 64. It should be noted that in the mating situation, the square block on the end cap 62 is inserted into the support shaft 17, and the tooth groove existing on the end cap 62 engages with the toothed ring 61. The screw 63 is used for fixation to prevent the support shaft 17 from rotating. The spring 64 is in a compressed state and has the effect of providing a pre-tightening force. Further, when the support shaft 17 needs to be rotated, rotate the screw 63. The screw 63 is screwed out of the support shaft 17, releasing the restriction between the end cap 62 and the support shaft 17. The spring 64 provides a restoring force, causing the end cap 62 to disengage from the square groove on the support shaft 17, enabling the support shaft 17 to rotate freely.

[0035] Further, the limiting component 6 realizes the functions of rapid locking and release of the support shaft 17 through mechanical linkage. The engaging fit between the end cap 62 and the toothed ring 61 of the support body 1 forms an anti-rotation structure. The position of the support shaft 17 can be firmly locked through the threaded fastening action of the screw 63, ensuring that no accidental rotation occurs during the test. The spring 64 makes the unlocking operation more convenient. Just loosen the screw 63, and the restoring force of the spring 64 can automatically push the end cap 62 out of the square groove, enabling the support shaft 17 to return to the free rotation state. The fit between the square block and the square groove not only provides precise axial positioning but also enhances the anti-torsion ability. This structure has the following advantages: First, the operation is simple, and only one screw 63 is required to complete the state switch; Second, automatic reset, the spring 64 always provides a stable separation force; Third, high stability, mechanical engagement and threaded fastening jointly ensure absolute stability in the locked state.

[0036] Specifically, the folding component 2 includes a lifting rod 21, a threaded rod 22 and a coupling shaft 23. The lifting rod 21 is threadedly connected to the threaded rod 22. The lifting rod 21 is rotatably connected to the first support plate 13. The threaded rod 22 is connected to the coupling shaft 23 through a universal coupling. A housing is provided at the connection between the threaded rod 22 and the coupling shaft 23. The housing is rotatably connected to the mounting plate 11.

[0037] Specifically, the transmission assembly 3 includes a turntable 31, on which an active wheel 32 is fixedly connected. An idle wheel 33 is engaged with the active wheel 32, and a main shaft 34 is fixedly connected to the idle wheel 33. One end of the main shaft 34 is engaged with the connecting shaft 23 through bevel gears. A worm 35 is provided at the other end of the main shaft 34. A worm gear 36 is engaged with the worm 35. A driven shaft 37 is fixedly connected to the worm gear 36. A first connecting rod 38 and a telescopic rod 4 are provided on the driven shaft 37. The driven shaft 37 is engaged with the first connecting rod 38 through bevel gears.

[0038] Further, the folding assembly 2 and the transmission assembly 3 are used in cooperation. The specific working process is as follows: One end of the main shaft 34 drives the folding assembly 2 to work, realizing the folding operation of the first support plate 13 and the second support plate 14. The other end of the main shaft 34 realizes the movement of the two longitudinal support bodies 1. Further, the connecting shaft 23 is inserted into the housing and is connected to the threaded rod 22 through a universal coupling. The threaded rod 22 is rotatably connected to the housing. The main shaft 34 drives the connecting shaft 23 to rotate, and the connecting shaft 23 drives the threaded rod 22 to rotate, so that the lifting rod 21 realizes the lifting operation, drives the first support plate 13 to fold inwards, and then drives the folding assembly 2 to rotate with the mounting plate 11 in the reverse direction. Further, the worm on the main shaft 34 drives the worm gear 36 to rotate, thereby driving the driven shaft 37 to rotate. Then, through the engagement of bevel gears, the first connecting rod 38 and the second connecting rod 41 are driven to rotate. The second connecting rod 41 is in threaded transmission with the sleeve 42, so that the longitudinal support body 1 undergoes relative displacement. The first connecting rod 38 is used to connect the telescopic rod 4 on the upper layer for threaded transmission.

[0039] Specifically, the telescopic rod 4 includes a second connecting rod 41 and a sleeve 42. The second connecting rod 41 is in threaded connection with the sleeve 42. The second connecting rod 41 is engaged with the driven shaft 37 through bevel gears. The sleeve 42 is fixedly connected to the angle steel 12.

[0040] In summary, the threaded rod 22 and the connecting shaft 23 connected by the universal coupling enable the threaded rod 22 to perform threaded transmission with the lifting rod 21 while being able to swing with the first support plate 13, solving the problem of axis deviation and making the spiral lifting movement of the lifting rod 21 more stable and reliable. The combined drive of the bevel gear of the main shaft 34 and the worm gear 36 and the worm 35 realizes synchronous drive for the folding assembly 2 to lift and the support body 1 to move horizontally. Based on the self-locking characteristic, the worm gear 36 and the worm 35 drive can automatically maintain the position stability and prevent accidental movement under load. The synchronous and symmetric displacement of the longitudinal support body 1 is realized. Cooperating with the spiral movement of the lifting rod 21, the whole system maintains a balanced force during the folding and unfolding process, not only being structurally compact, but also ensuring the action coordination of each motion unit through mechanical interlocking.

[0041] Specifically, the folding plate 7 is rotatably connected to the support body 1. A sleeve plate 71 is sleeved on the folding plate 7, and a cross plate 72 is inserted into the support body 1.

[0042] Furthermore, both the folding plate 7 and the cross plate 72 are used to improve the stability of the test tooling provided by the present invention. At the same time, the snap-connected cross plate 72 is more convenient for disassembly and installation. The folding plate 7 is used to cooperate with the folding and contraction of the test tooling. The sleeve plate 71 is sleeved at the hinge of the folding plate 7 to prevent accidental folding in the non-working state, ensure the structural rigidity during the test process, form a stable frame structure, jointly enhance the overall anti-deformation ability, meet the engineering requirements of rapid deployment and storage while ensuring the structural strength, and significantly improve the test efficiency.

[0043] Specifically, a knob 51 is rotatably connected to the support leg 5, and a toothed ring 52 is rotatably connected inside the support leg 5. The knob 51 meshes with the toothed ring 52.

[0044] Specifically, a lead screw 53 is threadedly connected to the toothed ring 52. The lower end of the support leg 5 is slidably connected to a floor foot 54, and the floor foot 54 is rotatably connected to the lead screw 53.

[0045] Furthermore, when the knob 51 is rotated, the toothed ring 52 is driven to rotate through meshing transmission, and then the axially moving lead screw 53 threadedly connected is driven. The lead screw 53 pushes the floor foot 54 rotatably connected to it to slide along the inner wall of the support leg 5, thereby realizing precise adjustment of the height of the device. Furthermore, the self-locking characteristic of the screw drive enables the floor foot 54 to automatically maintain its position after adjustment, and the operation is simple. Only one hand needs to rotate the knob 51 to complete leveling. The sliding guide of the support leg 5 and the floor foot 54 ensures the precise movement track of the floor foot 54, and the adjusted height can be maintained unchanged for a long time in cooperation with the thread, which not only ensures the adjustment accuracy but also can bear a large load.

[0046] Working principle: During use, rotate the knob 51 to retract the floor foot 54 so that the universal wheel 18 contacts the ground to form a support. Unscrew the screw 63 to release the limitation of the end cap 62 on the support shaft 17, and then rotate the turntable 31. The main shaft 34 is driven to rotate by the driving wheel 32. Through the meshing of the bevel gears on the main shaft 34 and the worm 35 and worm gear 36 drive, the folding assembly 2 and the telescopic rod 4 are driven to contract. While the first support plate 13 and the second support plate 14 are folded and contracted, the two side longitudinal support bodies 1 contract synchronously to realize the folding of the test work, and then the test tooling can be pushed to move.

[0047] The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An aircraft bomb bay test piece display tool, comprising four symmetrically distributed bracket bodies (1), characterized in that: A mounting plate (11) is fixedly connected between the bracket bodies (1), an angle steel (12) is fixedly connected to the bracket body (1), a first support plate (13) is arranged between the bracket bodies (1), a second support plate (14) is arranged between the bracket bodies (1), the first support plate (13) and the second support plate (14) are hinged, a support frame (15) is clamped on the first support plate (13), a folding assembly (2) is arranged between the first support plate (13) and the mounting plate (11), a transmission assembly (3) is arranged between the bracket bodies (1), a telescopic rod (4) is arranged between the angle steel (12) and the bracket body (1), a universal wheel (18) is arranged at the lower end of the bracket body (1), a support foot (5) is arranged at the lower end of the bracket body (1), a limit assembly (6) is arranged between the second support plate (14) and the bracket body (1), and a folding plate (7) is arranged between the bracket bodies (1).

2. The aircraft bomb bay test piece display tool according to claim 1, characterized in that: A connecting plate (16) is fixedly connected to the lower end of the first supporting plate (13), and the connecting plate (16) is rotatably connected to the bracket body (1). A supporting shaft (17) is fixedly connected to the second supporting plate (14), and the supporting shaft (17) is rotatably connected to the bracket body (1).

3. The aircraft bomb bay test piece display tool according to claim 1, characterized in that: The folding assembly (2) comprises a lifting rod (21), a threaded rod (22) and a connecting shaft (23); the lifting rod (21) and the threaded rod (22) are threadedly connected; the lifting rod (21) is rotatably connected to the first support plate (13); the threaded rod (22) and the connecting shaft (23) are connected via a universal coupling; a shell is provided at the connection between the threaded rod (22) and the connecting shaft (23); and the shell is rotatably connected to the mounting plate (11).

4. The aircraft bomb bay test piece display tool according to claim 1, characterized in that: The transmission assembly (3) comprises a rotating disk (31), a driving wheel (32) being fixedly connected to the rotating disk (31), a driven wheel (33) being meshed with the driving wheel (32), a main shaft (34) being fixedly connected to the driven wheel (33), one end of the main shaft (34) being meshed with the connecting shaft (23) via a bevel gear, a worm (35) being provided at the other end of the main shaft (34), a worm wheel (36) being meshed with the worm (35), a driven shaft (37) being fixedly connected to the worm wheel (36), a first connecting rod (38) and a telescopic rod (4) being provided on the driven shaft (37), and the driven shaft (37) being meshed with the first connecting rod (38) via a bevel gear.

5. The aircraft bomb bay test piece display tooling according to claim 4, characterized in that: The telescopic rod (4) comprises a second connecting rod (41) and a sleeve (42); the second connecting rod (41) is threadedly connected to the sleeve (42); the second connecting rod (41) is meshed with the driven shaft (37) via a bevel gear; and the sleeve (42) is fixedly connected to the angle steel (12).

6. The aircraft bomb bay test piece display tool according to claim 1, characterized in that: The support foot (5) is rotatably connected to a knob (51), the interior of the support foot (5) is rotatably connected to a toothed ring (52), and the knob (51) is meshed with the toothed ring (52).

7. The aircraft bomb bay test piece display tool according to claim 6, characterized in that: A screw rod (53) is threadedly connected to the gear ring (52), a base (54) is slidably connected to the lower end of the support foot (5), and the base (54) is rotatably connected to the screw rod (53).

8. The aircraft bomb bay test piece display tool according to claim 1, characterized in that: The limiting assembly (6) comprises an end cover (62), a gear ring (61) is arranged on the support body (1), the end cover (62) and the gear ring (61) are arranged correspondingly, the end cover (62) is plugged into the support shaft (17), a screw (63) passes through the end cover (62), the screw (63) is threadedly connected to the support shaft (17), and a spring (64) is sleeved on the outer side of the screw (63).

9. The aircraft bomb bay test piece display tool according to claim 8, characterized in that: One end of the spring (64) contacts the support shaft (17), and one end of the spring (64) contacts the end cover (62).

10. The aircraft bomb bay test piece display tool according to claim 1, characterized in that: The folding plate (7) is rotatably connected to the bracket body (1); a sleeve plate (71) is sleeved on the folding plate (7); and a transverse plate (72) is plugged into the bracket body (1).

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