Aircraft fuselage transfer trolley

Abstract

The utility model discloses an aircraft fuselage transfer trolley which comprises a trolley body, the trolley body comprises a front frame body and a rear frame body which are fixedly connected, and the height of the front frame body is larger than that of the rear frame body; a middle supporting mechanism and a height-adjustable undercarriage mounting mechanism are arranged at the two ends of the front frame body respectively, the undercarriage mounting mechanism is used for being connected with a front undercarriage of a fuselage, the middle supporting mechanism is used for lifting the middle of the fuselage, a height-adjustable rear supporting mechanism is arranged at the end of the rear frame body, and the middle supporting mechanism and the rear supporting mechanism are oppositely arranged. The rear supporting mechanism is used for lifting the rear portion of the fuselage. The device has the advantages of being compact in structure, convenient and fast to operate, high in adjusting flexibility and the like, and the field transfer efficiency of an airplane in different maintenance procedures is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft transportation, and in particular relates to an aircraft fuselage transportation vehicle. Background Art

[0002] The new aircraft undergoing trial repairs at the factory has a total fuselage length of 17.1 meters and a wingspan of 9.75 meters. According to the repair process, after disassembly in the final assembly and disassembly workshop, it undergoes paint stripping, painting, and flaw detection. The factory's initial repairs employed a fixed-position maintenance method, using jacks and fuselage brackets to lift and secure the aircraft. With increasing mission volume, new requirements such as long-distance land transportation and off-site repairs have emerged, necessitating a fuselage transfer vehicle suitable for this new aircraft to meet these site transitions.

[0003] Chinese patent CN210761056U discloses a large aircraft fuselage transporter comprising a movable intermediate connecting frame and two opposing carriers. The carriers comprise a vehicle body, a shock-absorbing mechanism, and a carrier for lifting the fuselage. The intermediate connecting frame is bolted to the two carriers. Before use, the intermediate connecting frame and the two carriers are separated. During use, the two carriers are first moved to the bottom of the fuselage and lift the aircraft. The intermediate connecting frame is then moved between the two carriers and connected. Finally, the fuselage is transported to the desired location.

[0004] The aforementioned large aircraft fuselage transporter only has two brackets, one at the front and one at the rear, and the dimensions are incompatible with new aircraft. Furthermore, the vehicle utilizes a split-body structure, with each component connected by bolts, requiring constant disassembly and assembly during use. To facilitate mobility, each component is equipped with casters, resulting in a large number of wheels and posing risks during use. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide an aircraft fuselage transfer vehicle with a compact structure, convenient operation, and high adjustment flexibility to address the shortcomings of existing aircraft fuselage transfer vehicles. To achieve the above objectives, the present invention can adopt the following technical solutions:

[0006] An aircraft fuselage transfer vehicle comprises a vehicle body, wherein the vehicle body comprises a front frame body and a rear frame body which are connected and fixed, and the height of the front frame body is greater than that of the rear frame body; both ends of the front frame body are respectively provided with a middle support mechanism and a height-adjustable landing gear mounting mechanism, the landing gear mounting mechanism is used to connect the front landing gear of the fuselage, the middle support mechanism is used to lift the middle part of the fuselage, and the end of the rear frame body is provided with a height-adjustable rear support mechanism, the middle support mechanism and the rear support mechanism are arranged opposite to each other, and the rear support mechanism is used to lift the rear part of the fuselage.

[0007] As a further improvement of the present invention, the landing gear mounting mechanism includes a connecting frame, a height adjustment assembly and a lateral adjustment assembly, the height adjustment assembly is arranged at the end of the front frame body, the lateral adjustment assembly is arranged on the height adjustment assembly, the connecting frame is arranged on the lateral adjustment assembly, and a locking nut and a mounting shaft are provided on the connecting frame, the mounting shaft is used to connect the front landing gear of the fuselage, and the locking nut is used to lock the mounting shaft.

[0008] As a further improvement of the present invention, the height adjustment assembly includes a first screw rod and a first wheel seat, the first screw rod passes through the first wheel seat, and the top of the first screw rod is connected and fixed to the lateral adjustment assembly, and the bottom of the first screw rod is threadedly connected to the end of the front frame; when the first wheel seat is rotated, the first screw rod drives the lateral adjustment assembly to rise and fall.

[0009] As a further improvement of the present invention, the lateral movement adjustment assembly includes a first handwheel assembly and a first support frame, the two sides of the bottom of the first support frame are respectively connected and fixed to the first screw rod, the first support frame is provided with a through first slide groove, the first handwheel assembly is arranged in the first slide groove, and the connecting frame is connected to the first handwheel assembly, and the first handwheel assembly is used to drive the connecting frame to move back and forth along the first slide groove.

[0010] As a further improvement of the present invention, the rear support mechanism includes a lifting frame, a height adjustment assembly and a lateral adjustment assembly. The height adjustment assembly is arranged at the end of the rear frame, the lateral adjustment assembly is movably arranged on the height adjustment assembly, and the lifting frame is arranged on the lateral adjustment assembly. The lifting frame is used to lift the rear of the fuselage.

[0011] As a further improvement of the present invention, the height adjustment assembly includes a second screw rod and a second wheel seat, the second screw rod passes through the second wheel seat, and the top of the second screw rod is connected and fixed to the lateral adjustment assembly through a second locking piece and a pin, and the bottom of the second screw rod is threadedly connected to the end of the rear frame; when the pin is removed, the lateral adjustment assembly and the lifting frame can be laid down.

[0012] As a further improvement of the present invention, the lateral movement adjustment assembly includes a second handwheel assembly and a second support frame, the two sides of the bottom of the second support frame are respectively movably connected to the second screw rod, the second support frame is provided with a through second slide groove, the second handwheel assembly is arranged in the second slide groove, and the lifting frame is connected to the second handwheel assembly, and the second handwheel assembly is used to drive the lifting frame to move back and forth along the second slide groove.

[0013] As a further improvement of the present invention, the bottom of the front frame is provided with a load-bearing main wheel; the bottom of the front frame and the bottom of the rear frame are both provided with a height-adjustable universal wheel set and a height-adjustable ground support component.

[0014] As a further improvement of the present invention, the universal wheel group includes a universal wheel, a third support frame, a connecting side plate and a screw adjustment assembly; universal wheels are symmetrically provided on both sides of the bottom of the third support frame, and the two ends of the third support frame are respectively connected to the screw adjustment assembly arranged on the inner side of the connecting side plate, and the outer side of the connecting side plate is connected and fixed to the front frame body or the rear frame body.

[0015] As a further improvement of the present invention, a traction mechanism is provided on the vehicle body, and handrails are provided on both sides of the front frame.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The aircraft fuselage transfer vehicle of the present invention is composed of a fixed front frame and a rear frame to form an integrated vehicle body, which helps to reduce the overall volume of the transfer vehicle. A central support mechanism and a height-adjustable landing gear mounting mechanism are respectively provided at both ends of the front frame, and a height-adjustable rear support mechanism is provided at the end of the rear frame. When the fuselage needs to be transferred, the aircraft is first lifted in place using a jack, and then the transfer vehicle is moved to the bottom of the aircraft. The front landing gear of the fuselage is connected to the landing gear mounting mechanism, the central support mechanism is used to lift the middle part of the fuselage, and the rear support mechanism is used to lift the rear part of the fuselage. This convenient and efficient method improves the efficiency of transferring the aircraft fuselage between different processes such as paint removal, painting, and flaw detection. Furthermore, the height of the landing gear mounting mechanism and the rear support mechanism can be adjusted according to actual application requirements, improving the fit between the transfer vehicle and the fuselage and ensuring the stability of the fuselage during transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structural principle of the aircraft fuselage transfer vehicle in a specific embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure principle of the landing gear installation mechanism in a specific embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structural principle of the rear support mechanism in a specific embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structural principle of the universal wheel assembly in a specific embodiment of the present utility model;

[0022] Legend: 1. Vehicle body; 11. Front frame; 12. Rear frame; 2. Landing gear mounting mechanism; 21. First handwheel assembly; 22. First screw rod; 23. First wheel seat; 24. First locking piece; 25. First support frame; 251. First slide groove; 26. Connecting frame; 27. Locking nut; 28. Mounting shaft; 3. Middle support mechanism; 4. Rear support mechanism; 41. Second handwheel assembly; 42. Lifting frame; 43. Second screw rod; 44. Second wheel seat; 45. Second locking piece; 46. Latch; 47. Third locking piece; 48. Second support frame; 5. Traction mechanism; 6. Load-bearing main wheel; 7. Universal wheel assembly; 71. Third wheel seat; 72. Universal wheel; 73. Third support frame; 74. Screw nut; 75. Third screw rod; 76. Connecting side panel; 8. Ground support assembly; 9. Handrail. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Example

[0027] like Figures 1 to 4As shown, the aircraft fuselage transport vehicle of the present invention includes a vehicle body 1, which includes a welded front frame 11 and a rear frame 12. Both the front frame 11 and the rear frame 12 are welded together using section steel, and the height of the front frame 11 is greater than that of the rear frame 12. A middle support mechanism 3 and a height-adjustable landing gear mounting mechanism 2 are respectively provided at both ends of the front frame 11. The landing gear mounting mechanism 2 is used to connect the front landing gear of the fuselage, and the middle support mechanism 3 is used to support the middle part of the fuselage. The end of the rear frame 12 is provided with a height-adjustable rear support mechanism 4. The rear support mechanism 4 is used to support the rear part of the fuselage. The middle support mechanism 3 and the rear support mechanism 4 are arranged opposite each other.

[0028] In this embodiment, a front frame 11 and a rear frame 12 are connected and fixed to form a one-piece vehicle body 1, which helps reduce the overall size of the transfer vehicle. A central support mechanism 3 and a height-adjustable landing gear mounting mechanism 2 are provided at each end of the front frame 11, and a height-adjustable rear support mechanism 4 is provided at the end of the rear frame 12. When the fuselage needs to be transported, the aircraft is first lifted in place using a jack, and the transfer vehicle is then moved under the aircraft. The front landing gear of the fuselage is connected to the landing gear mounting mechanism 2, the central support mechanism 3 is used to lift the middle portion of the fuselage, and the rear support mechanism 4 is used to lift the rear portion of the fuselage. This facilitates and improves the efficiency of transferring the fuselage between different processes such as paint stripping, painting, and flaw detection. Furthermore, the heights of the landing gear mounting mechanism 2 and the rear support mechanism 4 can be adjusted according to actual application requirements, improving the fit of the transfer vehicle to the fuselage and ensuring the stability of the fuselage during transport.

[0029] like Figure 2 As shown, the landing gear mounting mechanism 2 includes a connecting frame 26, a height adjustment assembly, and a lateral adjustment assembly. The height adjustment assembly is mounted on the end of the front frame body 11, and the lateral adjustment assembly is mounted on the height adjustment assembly. The connecting frame 26 is mounted on the lateral adjustment assembly. A locking nut 27 and a mounting shaft 28 are provided on the top of the connecting frame 26. The mounting shaft 28 is used to connect to the front landing gear of the fuselage. The locking nut 27 is used to lock the mounting shaft 28 to achieve a fixed connection between the landing gear mounting mechanism 2 and the front landing gear of the fuselage.

[0030] like Figure 2 As shown, the height adjustment assembly includes a first screw rod 22 and a first wheel base 23. The first screw rod 22 extends through the first wheel base 23. The top of the first screw rod 22 is fixedly connected to the lateral adjustment assembly, while the bottom of the first screw rod 22 is threadedly connected to the end of the front frame body 11. When the first wheel base 23 is rotated, the first screw rod 22 drives the lateral adjustment assembly to rise and fall, thereby causing the connecting frame 26 to rise and fall.

[0031] like Figure 2As shown, the lateral adjustment assembly includes a first handwheel assembly 21 and a first support frame 25. The two sides of the bottom of the first support frame 25 are respectively connected and fixed to the first screw rod 22. The first support frame 25 is provided with a through first slide groove 251. The first handwheel assembly 21 is arranged in the first slide groove 251, and the connecting frame 26 is connected to the first handwheel assembly 21. The first handwheel assembly 21 is used to drive the connecting frame 26 to move back and forth along the first slide groove 251. It can be understood that the first handwheel assembly 21 adopts the form of a handwheel and an adjustment screw rod. The adjustment screw rod is arranged in the first slide groove 251 and passes through the side of the first support frame 25 and is connected to the handwheel. By turning the handwheel, the adjustment screw rod is driven to rotate, and the lateral displacement adjustment of the connecting frame 26 can be achieved. Furthermore, the first support frame 25 and the connecting frame 26 are both made of steel sections, which have the advantages of high structural strength and reliable connection.

[0032] Specifically, after adjusting the connecting frame 26 to a preset height using the first screw rod 22 and the first wheel base 23, the connecting frame 26 is adjusted to a suitable position using the first handwheel assembly 21. The connecting frame 26 is locked to the first support frame 25 using the first locking member 24. The mounting shaft 28 is inserted through the fuselage landing gear mounting holes from both sides of the fuselage and secured with the locking nut 27. The front portion of the fuselage is thus secured. The first locking member 24 can specifically be a bolt assembly.

[0033] In this embodiment, the landing gear mounting mechanism 2 is adjustable vertically and horizontally, accommodating minor deviations of the aircraft fuselage caused by the different positions of the adjustable support mechanism at the center and rear. This also prevents errors caused by changes in the tooling structure during extended use. The landing gear mounting mechanism 2 not only serves as a traditional support structure but also stabilizes the fuselage, preventing it from deflecting during transport.

[0034] like Figure 3 As shown, the rear support mechanism 4 includes a lifting frame 42, a height adjustment assembly, and a lateral adjustment assembly. The height adjustment assembly is mounted at the end of the rear frame 12, and the lateral adjustment assembly is movably mounted on the height adjustment assembly. The lifting frame 42 is mounted on the lateral adjustment assembly and is used to lift the rear portion of the aircraft fuselage. The middle support mechanism 3 has a similar structure to the rear support mechanism 4, except that the middle support mechanism 3 does not include a height adjustment assembly. That is, the height position of the middle support mechanism 3 at the end of the front frame 11 is fixed, but the lateral position of the lifting frame can be adjusted to better fit the aircraft fuselage.

[0035] like Figure 3As shown, the height adjustment assembly includes a second screw rod 43 and a second wheel base 44. The second screw rod 43 extends through the second wheel base 44. The top of the second screw rod 43 is connected to the lateral adjustment assembly via a second locking member 45 and a latch 46. The bottom of the second screw rod 43 is threadedly connected to the end of the rear frame 12. When the latch 46 is removed, the lateral adjustment assembly and the lifting frame 42 can be laid down, making it easier to move the transfer vehicle to the bottom of the aircraft.

[0036] In this embodiment, both the central support mechanism 3 and the rear support mechanism 4 employ a reversible design. After the lifting frame is leveled, the aircraft transfer vehicle can be towed beneath the aircraft simply by raising the lower portion of the aircraft fuselage above the landing gear mounting mechanism 2, shortening the time required to adjust the aircraft's height. This height-adjustable design allows the aircraft fuselage to remain level on the transfer vehicle, reducing radial loads on the front and rear of the fuselage caused by an uneven fuselage.

[0037] like Figure 3 As shown, the lateral adjustment assembly includes a second handwheel assembly 41 and a second support frame 48. The bottom sides of the second support frame 48 are movably connected to the second screw rod 43. The second support frame 48 is provided with a through second slot 481. The second handwheel assembly 41 is disposed within the second slot 481, and the lifting frame 42 is connected to the second handwheel assembly 41. The second handwheel assembly 41 is used to drive the lifting frame 42 to move back and forth along the second slot 481. The lifting frame 42 is locked to the second support frame 48 by a third locking member 47. It can be understood that the second handwheel assembly 41 adopts the form of a handwheel and an adjustment screw rod. The adjustment screw rod is disposed within the second slot 481 and passes through the side of the second support frame 48 and is connected to the handwheel. Turning the handwheel drives the adjustment screw rod to rotate, thereby achieving lateral displacement adjustment of the lifting frame 42. Furthermore, both the second support frame 48 and the lifting frame 42 are made of steel sections, which have the advantages of high structural strength and reliable connection.

[0038] like Figure 1 As shown, the bottom of the front frame 11 is provided with a load-bearing main wheel 6. The bottom of the front frame 11 and the bottom of the rear frame 12 are both provided with a height-adjustable universal wheel group 7 and a height-adjustable ground support assembly 8. In this embodiment, the universal wheel group 7 of the vehicle body 1 is in contact with the ground and can move freely at the bottom of the aircraft. The orientation of the transfer vehicle is fine-tuned by the universal wheel group 7. After the transfer vehicle is positioned at the bottom of the aircraft, each universal wheel group 7 is lifted off the ground and does not interfere with the movement of the load-bearing main wheel 6 at the bottom of the front frame 11. The ground support assembly 8 can be in the form of a screw adjustment assembly in conjunction with a support seat. The height of the support seat is adjusted by the screw adjustment assembly to achieve the overall lifting or lowering of the vehicle body 1.

[0039] like Figure 4As shown, the universal wheel assembly 7 includes universal wheels 72, a third support frame 73, a connecting side plate 76, and a screw adjustment assembly. Universal wheels 72 are symmetrically provided on both sides of the bottom of the third support frame 73. The two ends of the third support frame 73 are respectively connected to the screw adjustment assembly provided on the inner side of the connecting side plate 76. The outer side of the connecting side plate 76 is fixedly connected to the front frame body 11 or the rear frame body 12.

[0040] Specifically, the screw adjustment assembly includes a third wheel disc seat 71, a screw nut 74, and a third screw 75. The screw nut 74 is connected to the end of the third support frame 73. The third screw 75 passes through the screw nut 74 and is located inside the connecting side plate 76. The top of the third screw 75 passes through the top of the connecting side plate 76 and is connected to the third wheel disc seat 71. The bottom of the third screw 75 is connected to the bottom of the connecting side plate 76. Rotating the third wheel disc seat 71 rotates the third screw 75, which in turn drives the screw nut 74 to move the third support frame 73 up and down, ultimately raising and lowering the universal wheel 72.

[0041] like Figure 1 As shown, a traction mechanism 5 is provided on the vehicle body 1, and handrails 9 are provided on both sides of the front frame body 11. The handrails 9 facilitate pushing and pulling the vehicle body 1 when manpower is used for traction.

[0042] In this embodiment, after the transfer vehicle slowly enters the predetermined position, the support assembly 8 is fixed to raise the entire transfer vehicle, lifting the four main load-bearing wheels 6 off the ground. The third wheel disc seat 71 of the universal wheel assembly 7 is adjusted so that the four universal wheels 72 are downwardly contacted with the ground, and the four support assemblies 8 are released. The traction mechanism 5 can quickly adjust the transfer vehicle into position, reducing the time required for adjustment. At the same time, the lead screw nut 74 uses a waist-shaped hole threaded sleeve to prevent stress concentration between the universal wheel assembly 7 and the third lead screw 75 (T30 small lead screw) during the vertical adjustment process.

[0043] In this embodiment, to prevent structural deformation of the aircraft fuselage during land transportation, adjustable support mechanisms are installed on the front, middle, and rear bulkheads, ensuring the aircraft's stability during land transportation. By measuring the distances between the mid- and rear bulkheads and the landing gear mounting holes, and designing adjustable support mechanisms at the middle and rear bulkheads at corresponding locations on the tooling, this reduces design complexity while ensuring fuselage stability during hoisting.

[0044] 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 technical solution of the present invention.

Claims

1. An aircraft fuselage transfer vehicle, characterized in that: The invention comprises a vehicle body (1), wherein the vehicle body (1) comprises a front frame (11) and a rear frame (12) which are connected and fixed, and the height of the front frame (11) is greater than that of the rear frame (12); a middle support mechanism (3) and a height-adjustable landing gear mounting mechanism (2) are respectively provided at both ends of the front frame (11), the landing gear mounting mechanism (2) is used to connect the front landing gear of the fuselage, the middle support mechanism (3) is used to lift the middle part of the fuselage, and a rear support mechanism (4) with an adjustable height is provided at the end of the rear frame (12), the middle support mechanism (3) and the rear support mechanism (4) are arranged opposite to each other, and the rear support mechanism (4) is used to lift the rear part of the fuselage.

2. The aircraft fuselage transfer vehicle according to claim 1, characterized in that: The landing gear mounting mechanism (2) comprises a connecting frame (26), a height adjustment assembly and a lateral adjustment assembly, wherein the height adjustment assembly is arranged at the end of the front frame body (11), the lateral adjustment assembly is arranged on the height adjustment assembly, the connecting frame (26) is arranged on the lateral adjustment assembly, a locking nut (27) and a mounting shaft (28) are provided on the connecting frame (26), the mounting shaft (28) is used to connect the front landing gear of the fuselage, and the locking nut (27) is used to lock the mounting shaft (28).

3. The aircraft fuselage transfer vehicle according to claim 2, characterized in that: The height adjustment assembly includes a first screw rod (22) and a first wheel disc seat (23), wherein the first screw rod (22) passes through the first wheel disc seat (23), and the top of the first screw rod (22) is connected and fixed to the transverse adjustment assembly, and the bottom of the first screw rod (22) is threadedly connected to the end of the front frame body (11); when the first wheel disc seat (23) is rotated, the first screw rod (22) drives the transverse adjustment assembly to move up and down.

4. The aircraft fuselage transfer vehicle according to claim 3, characterized in that: The transverse movement adjustment assembly includes a first handwheel assembly (21) and a first support frame (25), the bottom two sides of the first support frame (25) are respectively connected and fixed to the first screw rod (22), the first support frame (25) is provided with a through first slide groove (251), the first handwheel assembly (21) is arranged in the first slide groove (251), and the connecting frame (26) is connected to the first handwheel assembly (21), and the first handwheel assembly (21) is used to drive the connecting frame (26) to move back and forth transversely along the first slide groove (251).

5. The aircraft fuselage transfer vehicle according to claim 1, characterized in that: The rear support mechanism (4) includes a lifting frame (42), a height adjustment component and a transverse adjustment component. The height adjustment component is arranged at the end of the rear frame (12), the transverse adjustment component is movably arranged on the height adjustment component, and the lifting frame (42) is arranged on the transverse adjustment component. The lifting frame (42) is used to lift the rear part of the fuselage.

6. The aircraft fuselage transfer vehicle according to claim 5, characterized in that: The height adjustment assembly includes a second screw rod (43) and a second wheel disc seat (44), the second screw rod (43) passes through the second wheel disc seat (44), and the top of the second screw rod (43) is connected and fixed to the transverse adjustment assembly through a second locking member (45) and a latch (46), and the bottom of the second screw rod (43) is threadedly connected to the end of the rear frame (12); when the latch (46) is removed, the transverse adjustment assembly and the lifting frame (42) can be laid down.

7. The aircraft fuselage transfer vehicle according to claim 6, characterized in that: The transverse movement adjustment assembly includes a second handwheel assembly (41) and a second support frame (48), the bottom two sides of the second support frame (48) are movably connected to the second screw rod (43) respectively, the second support frame (48) is provided with a through second slide groove (481), the second handwheel assembly (41) is arranged in the second slide groove (481), and the lifting frame (42) is connected to the second handwheel assembly (41), and the second handwheel assembly (41) is used to drive the lifting frame (42) to move back and forth along the second slide groove (481).

8. The aircraft fuselage transfer vehicle according to any one of claims 1 to 7, characterized in that: The bottom of the front frame (11) is provided with a load-bearing main wheel (6); the bottom of the front frame (11) and the bottom of the rear frame (12) are both provided with a height-adjustable universal wheel group (7) and a height-adjustable ground support assembly (8).

9. The aircraft fuselage transfer vehicle according to claim 8, characterized in that: The universal wheel assembly (7) comprises a universal wheel (72), a third support frame (73), a connecting side plate (76) and a screw adjustment assembly; universal wheels (72) are symmetrically provided on both sides of the bottom of the third support frame (73), and the two ends of the third support frame (73) are respectively connected to the screw adjustment assembly arranged on the inner side of the connecting side plate (76), and the outer side of the connecting side plate (76) is connected and fixed to the front frame body (11) or the rear frame body (12).

10. The aircraft fuselage transfer vehicle according to any one of claims 1 to 7, characterized in that: A traction mechanism (5) is provided on the vehicle body (1), and handrails (9) are provided on both sides of the front frame (11).

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