Supporting device for large aircraft fuselage

Abstract

The supporting device for the large aircraft fuselage comprises a bracket assembly and a bracket base which are detachably connected, the bracket assembly is used for supporting the bottom of the fuselage, and the two ends of the bracket assembly are detachably connected with corresponding supporting platforms respectively; after the multiple sets of supporting devices are supported and fixed to the bottom of the machine body and fixedly connected with the multiple sets of supporting platforms, the bracket base at the bottom of the bracket assembly is detached, and the machine body is erected. The supporting device has the advantages of being compact in structure, convenient to disassemble and assemble, high in structural strength, high in turnover utilization rate and the like, and meets the supporting requirement of a large aircraft fuselage.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft fuselage support, and in particular relates to a supporting device for a large aircraft fuselage. Background Art

[0002] In the field of aircraft manufacturing and maintenance, the aircraft fuselage needs to be transported and supported. Before the mid-wing is assembled, the aircraft fuselage has a relatively "slender" appearance, so the head, middle, and tail of the fuselage must be supported during assembly operations. During the support process, traditional support tooling cannot be adjusted up and down, and operators can only work in a fixed position, which causes great trouble for operators operating in a certain area. In addition, the fuselage cannot be moved when using the support tooling, and the tooling is not easy to disassemble and assemble, which is extremely inconvenient if the fuselage needs to be transferred.

[0003] After removing major components such as the wings, vertical tail, and landing gear, the fuselage of a large aircraft has a total length of 34.8 meters, a maximum width of 2.9 meters, a maximum height of 3.3 meters, and a maximum weight of 17 to 18 tons. The maintenance process for this type of aircraft requires full-frame fixed-position repairs. After the aircraft arrives at the factory, it is supported and fixed with fuselage repair brackets at the front, middle, and rear main load-bearing frames. All components are removed for repair or replacement, and then reassembled according to the process. These three main load-bearing frames require simultaneous and even load-bearing, but the fuselage lacks integral lifting points and cannot be directly lifted, posing significant challenges to the maintenance of this large aircraft. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present invention provides a large aircraft fuselage support device with a compact structure, convenient assembly and disassembly, high structural strength, and high turnover rate, which meets the support and transportation needs of large aircraft maintenance. To achieve the above objectives, the present invention can adopt the following technical solutions:

[0005] A support device for a large aircraft fuselage includes a detachably connected bracket assembly and a bracket base. The bracket assembly is used to support the bottom of the fuselage, and both ends of the bracket assembly are detachably connected to corresponding support platforms. After multiple groups of support devices are supported and fixed on the bottom of the fuselage and connected and fixed to multiple groups of support platforms, the bracket base at the bottom of the bracket assembly is removed to achieve the purpose of suspending the fuselage.

[0006] As a further improvement of the present invention, the bracket assembly includes a strong connecting plate, H-shaped steel, a reinforcing lining plate and a support plate. The support plate is arranged on the top of the H-shaped steel and is used to support the fuselage. Reinforcing lining plates are provided on both sides of the H-shaped steel. Strong connecting plates are provided on the sides of the reinforcing lining plates. The strong connecting plates are used to connect to the support platform.

[0007] As a further improvement of the present invention, the bracket assembly further includes a rectangular tube, which is nested inside the H-shaped steel and close to the bottom of the support plate.

[0008] As a further improvement of the present invention, one end of the strong connecting plate is hinged to the side of the reinforcing lining plate, and the strong connecting plate can rotate along the hinge point; the other end of the strong connecting plate is provided with a second threaded hole for connecting to the support platform.

[0009] As a further improvement of the present invention, a plurality of first threaded holes are provided on the side of the strong connecting plate near the hinge point; when the other end of the strong connecting plate is connected to the supporting platform, bolts are screwed into the first threaded holes to achieve connection and fixation between the strong connecting plate and the reinforcing lining plate.

[0010] As a further improvement of the present invention, the bracket base includes: a support frame, a second support screw, an adjusting handwheel and a mounting plate; the two sides of the support frame are provided with a second support screw in the vertical direction, the adjusting handwheel is sleeved on the second support screw, the adjusting handwheel is located at the top of the support frame, the bottom of the mounting plate is detachably connected to the top of the second support screw, and the mounting plate is connected and fixed to the bottom of the bracket assembly; by screwing the adjusting handwheel, the second support screw drives the mounting plate to rise and fall, so as to realize the lifting and lowering of the bracket assembly, and then realize the bracket plate being close to or away from the bottom of the fuselage.

[0011] As a further improvement of the present invention, movable wheels are provided at the four corners of the bottom of the support frame to facilitate the overall movement of the bracket base.

[0012] As a further improvement of the present invention, ear seats are further provided at the four corners of the bottom of the support frame, and the ear seats are connected to the first support screw rod. When the support device is in working state, the first support screw rod is used to lift the support device to stabilize the load.

[0013] As a further improvement of the present invention, the support frame includes a base, a support beam and a cross beam. The base is a frame structure. A plurality of inclined support beams are respectively provided on both sides of the base. The two ends of the cross beam are respectively connected and fixed to the support beams.

[0014] As a further improvement of the present invention, the second support screw is arranged in a conical space surrounded by multiple support beams, and the adjustment handwheel is located on the top of the beam.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The support device for a large aircraft fuselage of the present invention comprises a main structure of the support device through a bracket assembly and a bracket base. Furthermore, by arranging multiple groups of support devices at different positions on the bottom of the fuselage for support, and detachably connecting the two ends of the bracket assembly to corresponding support platforms, a stable support of the fuselage is achieved. After the multiple groups of support devices are supported and fixed on the bottom of the fuselage and connected and fixed with the multiple groups of support platforms, the bracket bases in the support devices are removed, and the fuselage of the large aircraft is lifted by the support platform and the bracket assembly, which not only meets the support requirements when the large aircraft is being repaired and can provide operators with a larger operating space, but also realizes the support and fixation of the large aircraft fuselage during transportation within the maintenance plant, thereby improving the safety of the fuselage transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structural principle of fixing the fuselage on the supporting device in a specific embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structural principle of the support device in a specific embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the structural principle of the bracket assembly in a specific embodiment of the present utility model;

[0020] Legend: 1. Bracket assembly; 11. Support plate; 12. Strong connecting plate; 121. First threaded hole; 122. Second threaded hole; 13. H-shaped steel; 14. Rectangular tube; 15. Reinforcement lining; 16. Bolt; 2. Bracket base; 21. Moving wheel; 22. First support screw; 23. Support frame; 231. Base; 232. Support beam; 233. Crossbeam; 24. Second support screw; 25. Adjustment handwheel; 26. Mounting plate; 27. Ear seat; 100. Fuselage. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0022] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] Example

[0025] like Figures 1 to 3 As shown, the present invention's large aircraft fuselage support device comprises a detachably connected bracket assembly 1 and bracket base 2. Each bracket assembly 1 is detachably connected to a corresponding support platform at both ends. After multiple sets of support assemblies are supported and secured to the bottom of a fuselage 100 and connected to multiple sets of support platforms, the bracket base 2 at the bottom of the bracket assembly 1 can be removed to lift the fuselage 100. In this embodiment, the support platform can be a conventional jack-lifting platform.

[0026] In this embodiment, the main structure of the support device is composed of the bracket assembly 1 and the bracket base 2. Furthermore, by arranging multiple sets of support devices at different locations on the bottom of the fuselage 100 for support, and detachably connecting the two ends of the bracket assembly 1 to the corresponding support platforms, a stable support for the fuselage 100 is achieved. After the multiple sets of support devices are supported and fixed on the bottom of the fuselage 100 and connected and fixed to the multiple sets of support platforms, the bracket base 2 in the support device is removed, and the support platform and the bracket assembly 1 are used to lift the fuselage 100 of a large aircraft. This not only meets the support requirements for large aircraft maintenance and can provide operators with a larger operating space, but also achieves support and fixation for the large aircraft fuselage during transportation, thereby improving the safety of the fuselage transportation.

[0027] like Figure 3As shown, in this embodiment, the bracket assembly 1 includes a support plate 11, a strong connecting plate 12, an H-shaped steel 13, and a reinforcing lining plate 15. The support plate 11 is arranged on top of the H-shaped steel 13 to support the fuselage 100. The reinforcing lining plates 15 are provided on both sides of the H-shaped steel 13. The ends of the reinforcing lining plates 15 are provided with strong connecting plates 12, which are used to connect to the support platform.

[0028] Furthermore, the bracket assembly 1 further includes a rectangular tube 14 , which is nested inside the H-shaped steel 13 and close to the bottom of the support plate 11 to enhance the overall supporting strength of the bracket assembly 1 .

[0029] like Figure 3 As shown, in this embodiment, one end of the strong connecting plate 12 is hinged to the side of the reinforcing lining plate 15, and the strong connecting plate 12 can rotate along the hinge point to reduce the space occupied by the bracket assembly 1 and facilitate the transportation of the bracket assembly 1. The other end of the strong connecting plate 12 is provided with two side-by-side second threaded holes 122 for connection to the support platform.

[0030] Furthermore, four first threaded holes 121 are provided on the side of the strong connecting plate 12 near the hinge point. When the other end of the strong connecting plate 12 is connected to the support platform, bolts 16 are screwed into the first threaded holes 121 to connect and fix the strong connecting plate 12 to the reinforcing lining plate 15, so that the strong connecting plate 12 and the reinforcing lining plate 15 form a whole, thereby improving the supporting capacity of the bracket assembly 1.

[0031] In this embodiment, the bracket assembly 1 is a critical load-bearing component. To support the overhead fuselage and secure it for transportation, it utilizes H-shaped steel 13 as the main beam, lined on either side with rectangular tubes 14 and reinforcing linings 15. The length of the bracket assembly 1 is designed to be the same width as the transport vehicle's deck. Four strong connecting plates 12 are used at each end of the bracket assembly 1 to increase the overhead span and reduce the stress on the ends of the steel beam. Software-simulated load tests concluded that a load of 180 kN applied to the bracket assembly 1 resulted in a maximum stress of 99 MPa. Based on the tensile yield strength of 300 MPa for the Q345 profile, the final safety factor for the bracket assembly 1 is approximately 3.0. The complete tooling of this embodiment is capable of assembling a large aircraft fuselage measuring 34.8 meters long, 2.9 meters wide, 3.3 meters high, and weighing 18 tons. With a safety factor of 3.0 achieved for key load-bearing components, the overall structure is safe and reliable during use, effectively meeting the requirements for relocating large aircraft fuselages.

[0032] like Figure 2As shown, in this embodiment, the bracket base 2 includes a moving wheel 21, a support frame 23, a second support screw rod 24, an adjusting hand wheel 25 and a mounting plate 26. The four corners of the bottom of the support frame 23 are provided with moving wheels 21 to facilitate the overall movement of the bracket base 2. The two sides of the support frame 23 are provided with a second support screw rod 24 in the vertical direction, and the adjusting hand wheel 25 is sleeved on the second support screw rod 24. The adjusting hand wheel 25 is located at the top of the support frame 23, and the bottom of the mounting plate 26 is detachably connected to the top of the second support screw rod 24. The mounting plate 26 is fixedly connected to the bottom of the bracket assembly 1. By screwing the adjusting hand wheel 25, the second support screw rod 24 drives the mounting plate 26 to rise and fall, so as to realize the lifting and lowering of the bracket assembly 1, and then realize the bracket 11 close to or away from the bottom of the fuselage 100.

[0033] Furthermore, the four corners of the bottom of the support frame 23 are provided with ear seats 27, which are connected to the first support screw 22. When the support device is in working state, the first support screw 22 is used to lift the support device as a whole to improve the stability of the overall load-bearing of the support device.

[0034] like Figure 2 As shown, in this embodiment, the support frame 23 includes a base 231, a support beam 232 and a crossbeam 233. The base 231 is a frame structure. A plurality of inclined support beams 232 are provided on both sides of the base 231, and the two ends of the crossbeam 233 are respectively connected and fixed to the support beam 232. The base 231 and the crossbeam 233 are connected to form a whole, which not only ensures the structural strength of the support frame 23 as a whole, but also does not increase the weight of the support frame 23, so as to improve the mobility of the support frame 23. The second support screw 24 is arranged in a conical space enclosed by the plurality of support beams 232, and the adjustment handwheel 25 is located at the top of the crossbeam 233. The support provided by the plurality of support beams 232 and the crossbeam 233 is used to improve the firmness of the second support screw 24, thereby improving the accuracy of the lifting and lowering adjustment of the bracket assembly 1.

[0035] Although the present invention is disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the spirit and technical solution of the present invention, utilize the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change, and modification of the above embodiments made in accordance with the technical spirit of the present invention, without departing from the content of the technical solution of the present invention, shall still fall within the scope of protection of the present technical solution.

Claims

1. A large aircraft fuselage support device, characterized in that: The invention comprises a detachably connected bracket assembly (1) and a bracket base (2), wherein the bracket assembly (1) is used to support the bottom of a fuselage (100), and the two ends of the bracket assembly (1) are detachably connected to corresponding support platforms; when multiple groups of support devices are supported and fixed on the bottom of the fuselage (100) and connected and fixed to the multiple groups of support platforms, the bracket base (2) at the bottom of the bracket assembly (1) is removed to realize the lifting of the fuselage (100).

2. The large aircraft fuselage support device according to claim 1, characterized in that: The bracket assembly (1) comprises a support plate (11), a strong connecting plate (12), an H-shaped steel (13) and a reinforcing lining plate (15); the support plate (11) is arranged on the top of the H-shaped steel (13) for supporting the fuselage (100); reinforcing lining plates (15) are arranged on both sides of the H-shaped steel (13); strong connecting plates (12) are arranged on the sides of the reinforcing lining plate (15); and the strong connecting plates (12) are used to connect to the supporting platform.

3. The large aircraft fuselage support device according to claim 2, characterized in that: The bracket assembly (1) also includes a rectangular tube (14), which is nested inside the H-shaped steel (13) and close to the bottom of the support plate (11).

4. The large aircraft fuselage support device according to claim 2, characterized in that: One end of the strong connection plate (12) is hinged to the side of the reinforcing lining plate (15), and the strong connection plate (12) can rotate along the hinge point; the other end of the strong connection plate (12) is provided with a second threaded hole (122) for connecting to the support platform.

5. The large aircraft fuselage support device according to claim 4, characterized in that: A plurality of first threaded holes (121) are provided on the side of the strong connection plate (12) near the hinge point; when the other end of the strong connection plate (12) is connected to the support platform, bolts (16) are screwed into the first threaded holes (121) to achieve connection and fixation between the strong connection plate (12) and the reinforcement lining plate (15).

6. The large aircraft fuselage support device according to any one of claims 1 to 5, characterized in that: The bracket base (2) comprises: a support frame (23), a second support screw rod (24), an adjusting hand wheel (25) and a mounting plate (26); the second support screw rods (24) are arranged on both sides of the support frame (23) in the vertical direction, the adjusting hand wheel (25) is sleeved on the second support screw rods (24), the adjusting hand wheel (25) is located at the top of the support frame (23), the bottom of the mounting plate (26) is detachably connected to the top of the second support screw rod (24), and the mounting plate (26) is connected and fixed to the bottom of the bracket assembly (1); by rotating the adjusting hand wheel (25), the second support screw rod (24) drives the mounting plate (26) to rise and fall, so as to realize the lifting and lowering of the bracket assembly (1), thereby realizing the bracket (11) being close to or away from the bottom of the fuselage (100).

7. The large aircraft fuselage support device according to claim 6, characterized in that: The four corners of the bottom of the support frame (23) are provided with moving wheels (21) to facilitate the overall movement of the bracket base (2).

8. The large aircraft fuselage support device according to claim 6, characterized in that: The four corners of the bottom of the support frame (23) are also provided with ear seats (27), and the ear seats (27) are connected to the first support screw rod (22). When the support device is in a working state, the first support screw rod (22) is used to lift the support device to stabilize the load.

9. The large aircraft fuselage support device according to claim 6, characterized in that: The support frame (23) comprises a base (231), a support beam (232) and a cross beam (233); the base (231) is a frame structure; a plurality of inclined support beams (232) are respectively arranged on both sides of the base (231); and both ends of the cross beam (233) are respectively connected and fixed to the support beam (232).

10. The large aircraft fuselage support device according to claim 9, characterized in that: The second supporting screw rod (24) is arranged in a conical space surrounded by a plurality of supporting beams (232), and the adjusting hand wheel (25) is located on the top of the cross beam (233).

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