Folding airstairs for aircraft cockpit

Abstract

The utility model discloses a folding airstairs for an aircraft cockpit, which mainly comprises a hook component and a plurality of airstairs body components, and the airstairs body components are connected with one another in a hinged manner and can be quickly folded and unfolded. The hook assembly and the ladder body assembly at the topmost end are fixed through a connecting screw, and the hook can be rotationally stored, so that the storage volume is further reduced. In addition, the ladder body assembly is assembled by adopting an aluminum alloy die sinking piece, the hook assembly is machined by adopting titanium alloy, and the whole boarding ladder is light in weight which is only 12.6 kg. After the folding airstairs are folded, the size of the folding airstairs is greatly reduced, the problems of carrying and transferring are effectively solved, the agile carrying capacity and the response speed of troops are improved, and the folding airstairs have important military application value.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation ground support, in particular to a foldable boarding ladder for an aircraft cabin. Background Art

[0002] Aircraft require a cabin boarding ladder for maintenance personnel and pilots to enter the cockpit during both support and flight operations. Currently, some aircraft use a non-folding cabin boarding ladder. This design is not a major issue for use within an airport, but during field training or agile support missions, the existing ladder is bulky and cannot be folded, requiring significant space and making it inconvenient for agile transport and support. This situation not only increases the burden on troops during transport but also potentially impacts their responsiveness and combat effectiveness. Utility Model Content

[0003] The utility model aims to provide a foldable boarding ladder for an aircraft cabin, so as to solve the problem that the prior art is inconvenient for agile carrying and ensuring transportation.

[0004] The utility model is realized by adopting the following technical scheme: a foldable boarding ladder for an aircraft cabin, characterized in that it comprises a hook assembly and a plurality of ladder body assemblies, wherein the plurality of ladder body assemblies are arranged in sequence and each ladder body assembly is hinged to the adjacent ladder body assemblies, and the hook assembly is connected to the topmost ladder body assembly by a connecting screw.

[0005] Furthermore, the ladder body assembly includes two symmetrically arranged folding assemblies, the folding assemblies are hinged to the folding assemblies of adjacent ladder body assemblies, and the symmetrically arranged folding assemblies are connected via pedals.

[0006] Furthermore, the folding assembly includes an upper plate, a lower plate and side plates, the left and right sides of the side plates are hinged to the upper plate and the lower plate respectively, and the upper and lower ends of the upper plate, the lower plate and the side plates are hinged to the upper plate, the lower plate and the side plates of the adjacent ladder assembly respectively.

[0007] Furthermore, the hinged rotation angles between the upper plate and the side plates and between the lower plate and the side plates are 90° and the rotation directions are the same.

[0008] Furthermore, it also includes a quick latch, and coaxial pin holes are provided on the upper plate and the lower plate, and the quick latch passes through the pin holes to fix the ladder body assembly.

[0009] Furthermore, it also includes support legs, which are arranged on the ladder body component at the bottom and are fixed to the side panels by bolts.

[0010] Furthermore, the hook assembly includes a hook, a hanger and a connecting rod. The hook is rotatably connected to the hanger and fixed by a positioning pin. After removing the positioning pin, the hook can be rotatably stored. The connecting rod is fixedly connected to the hanger, and the connecting rod is connected to the upper plate of the ladder body assembly by a connecting screw.

[0011] The foldable aircraft cabin boarding ladder of the utility model has the following beneficial effects:

[0012] Solved the problem of carrying and transporting: Through the foldable design, the volume of the boarding ladder is greatly reduced after folding, which is 87.9% smaller than the volume in the working state, thus effectively solving the problem of the boarding ladder taking up a large space during carrying and transporting.

[0013] Improved agile carrying capability: The folded boarding ladder is lighter, making it easier for troops to carry and deploy quickly during external training and agile support, thereby improving the troops' agile response capability.

[0014] The lightweight requirements have been met: the ladder body components of the boarding ladder are assembled using aluminum alloy molded parts, and the hook components are machined from titanium alloy. The weight of the entire boarding ladder is only 12.6kg, achieving a lightweight design and further reducing the burden on the troops. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of a folding boarding ladder for an aircraft cabin;

[0017] Figure 2 Schematic diagram of the hook assembly;

[0018] Figure 3 Schematic diagram of the ladder assembly;

[0019] In the figure, 1-hook assembly, 2-connecting screw, 3-ladder body assembly, 4-quick latch, 11-hook, 12-hanging bracket, 13-connecting rod, 14-locating pin, 31-upper plate, 32-lower plate, 33-pedal, 34-side plate, 35-support leg, 36-pin hole. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0022] like Figure 1-3 As shown, a foldable boarding ladder for an aircraft cabin includes a hook assembly 1 and a ladder body assembly 3. The ladder body assemblies 3 include multiple ladder body assemblies 3, and the multiple ladder body assemblies 3 are connected in sequence. The hook assembly 1 is connected to the topmost ladder body assembly 3 by a connecting screw 2. The multiple ladder body assemblies 3 are hinged to each other so that adjacent ladder body assemblies 3 can be rotated and folded.

[0023] The ladder assembly 3 includes two sets of folding assemblies, which are connected by a pedal 33. The folding assemblies include an upper plate 31, a lower plate 32, and side plates 34. The left and right sides of the side plates 34 are hinged to the upper plate 31 and the lower plate 32, respectively. The upper and lower ends of the upper plate 31, the lower plate 32, and the side plates 34 are hinged to the upper plate 31, the lower plate 32, and the side plates 34 of the adjacent ladder assembly 3, respectively. The rotation angle between the upper plate 31 and the side plates 34, and the rotation direction between the lower plate 32 and the side plates 34 are 90 degrees. The upper plates 31 of the two sets of folding assemblies are connected by a pedal 33. The bottom end of the lowest ladder assembly 3 is also provided with a support foot 35, which is fixed to the side plate 34 by bolts.

[0024] The hook assembly 1 includes a hook 11, a hanger 12, and a connecting rod 13. The hook 11 is rotatably connected to the hanger 12 and fixed by a positioning pin 14. The hook 11 can be rotated and stored after the positioning pin 14 is removed. The connecting rod 13 is fixedly connected to the hanger 12 and is connected to the upper plate 31 of the ladder assembly 3 by a connecting screw 2.

[0025] Coaxial pin holes 36 are provided on the upper plate 31 and the lower plate 32 . The ladder assembly 3 is fixed by inserting the quick latch 4 into the pin holes 36 on the upper plate 31 and the lower plate 32 . The quick latch 4 adopts a tongue-shaped structure.

[0026] When folding and storing the foldable boarding ladder, first remove the quick latch 4, unfold the ladder body assembly 3 into a planar structure, then rotate and fold the ladder body assembly 3, and finally remove the positioning pin 14 to fold the hook 11.

[0027] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the scope of protection of the appended claims.

Claims

1. A foldable boarding ladder for an aircraft cabin, characterized in that: The invention comprises a hook assembly (1) and a plurality of ladder body assemblies (3), wherein the plurality of ladder body assemblies (3) are arranged in sequence and each ladder body assembly (3) is hinged to an adjacent ladder body assembly (3), and the hook assembly (1) is connected to the topmost ladder body assembly (3) via a connecting screw (2).

2. The foldable aircraft cabin boarding ladder according to claim 1, characterized in that: The ladder body assembly (3) comprises two symmetrically arranged folding assemblies, the folding assemblies being hinged to the folding assemblies of adjacent ladder body assemblies (3), and the symmetrically arranged folding assemblies are connected via pedals (33).

3. The foldable aircraft cabin boarding ladder according to claim 2, characterized in that: The folding assembly comprises an upper plate (31), a lower plate (32) and a side plate (34); the left and right sides of the side plate (34) are hinged to the upper plate (31) and the lower plate (32) respectively; and the upper and lower ends of the upper plate (31), the lower plate (32) and the side plate (34) are hinged to the upper plate (31), the lower plate (32) and the side plate (34) of the adjacent ladder assembly (3) respectively.

4. The foldable aircraft cabin boarding ladder according to claim 3, characterized in that: The hinged rotation angles between the upper plate (31) and the side plate (34) and between the lower plate (32) and the side plate (34) are 90° and the rotation directions are the same.

5. The foldable aircraft cabin boarding ladder according to claim 3, characterized in that: It also includes a quick latch (4), and coaxial pin holes (36) are provided on the upper plate (31) and the lower plate (32). The quick latch (4) passes through the pin hole (36) to fix the ladder body assembly (3).

6. The foldable aircraft cabin boarding ladder according to claim 4, characterized in that: It also includes a support foot (35), which is arranged on the ladder body assembly (3) at the bottom, and the support foot (35) is fixed to the side plate (34) by bolts.

7. The foldable aircraft cabin boarding ladder according to claim 3, characterized in that: The hook assembly (1) comprises a hook (11), a hanger (12) and a connecting rod (13); the hook (11) is rotatably connected to the hanger (12) and fixed via a positioning pin (14); after the positioning pin (14) is removed, the hook (11) can be rotatably stored; the connecting rod (13) is fixedly connected to the hanger (12); and the connecting rod (13) is connected to the upper plate (31) of the ladder assembly (3) via a connecting screw (2).

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