Universal cabin working ladder

Abstract

The utility model relates to the technical field of cabin working ladders, in particular to a universal cabin working ladder, which comprises a rear ladder assembly, a front ladder assembly and an upper ladder assembly hinged with the front ladder assembly, and further comprises a group of moving wheels arranged on the rear ladder assembly, a supporting assembly is arranged between the rear ladder assembly and the upper ladder assembly; according to the working ladder, the problem that an existing working ladder for a cabin of a main battle aircraft is not universal is effectively solved, all the assemblies are formed by installing and welding aluminum profiles, and the working ladder is low in machining cost, simple in overall structure, light in weight, capable of being rapidly folded and high in operability; through rough adjustment of the supporting point and fine adjustment of the adjusting screw rod, it is guaranteed that the top stepping stick is close to the edge of the cabin, air and ground crew of different types can enter the cabin for use, and universal guarantee of multiple types of aircrafts is achieved.

Description

Technical Field

[0001] This utility model relates to the field of cabin work ladder technology, specifically a general-purpose cabin work ladder. Background Technology

[0002] The existing cockpit access ladders for main combat aircraft mostly use a combination of attachment points and support points to connect to the fuselage, meeting the needs of air and ground crew for entering and exiting the cockpit. However, the interfaces and support positions of the existing cockpit access ladders for main combat aircraft vary greatly, and the cockpit heights also differ significantly, meaning they can only be used for a single aircraft model and cannot meet the requirements for universal support across different aircraft types. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a universal cabin work ladder.

[0004] A general-purpose cabin work ladder includes a rear ladder frame, a front ladder frame, and an upper ladder frame hinged to the front ladder frame;

[0005] The rear ladder frame is equipped with a set of casters;

[0006] A support assembly is provided between the rear ladder frame and the upper ladder frame;

[0007] A fine-tuning component for adjusting the tilt angle of the upper ladder is provided between the rear ladder frame and the front ladder frame.

[0008] Furthermore, a support rod is provided between the rear ladder frame and the front ladder frame to enable connection.

[0009] Furthermore, the support rod is connected to the rear ladder frame and the front ladder frame via quick-release pins.

[0010] Furthermore, the moving wheel consists of two directional wheels.

[0011] Furthermore, the support assembly includes lugs provided on both the rear ladder frame and the upper ladder frame, adjusting screws provided on the two sets of lugs, several sets of clamps and footboards provided on the upper ladder frame, and a handrail provided between the two sets of clamps.

[0012] Furthermore, the fine-tuning component includes hinge point one set on the upper ladder frame and the front ladder frame, hinge point two set between the rear ladder frame and the front ladder frame, and support point one, support point two, and support point three set on the rear ladder frame.

[0013] The beneficial effects of this utility model are:

[0014] This utility model effectively solves the problem of non-interchangeability of cockpit working ladders for existing main combat aircraft models. Each component is assembled and welded from aluminum profiles, resulting in low processing costs. The overall structure is simple, lightweight, and can be quickly folded, making it highly operable. By coarsely adjusting the support points and finely adjusting the adjusting screws, the top step is ensured to be close to the edge of the cockpit, meeting the needs of air and ground crew personnel of different aircraft models to enter the cockpit and achieving universal support across multiple aircraft types. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the folding structure of this utility model;

[0018] Reference numerals in the attached diagram: 1. Caster wheel; 2. Rear ladder frame; 3. Support rod; 4. Connector; 5. Adjusting screw; 6. Upper ladder frame; 7. Clamp; 8. Handrail; 9. Step; 10. Hinge point one; 11. Hinge point two; 12. Support point one; 13. Support point two; 14. Support point three; 15. Front ladder frame; 16. Step; 17. Quick release pin; 18. Spiral support foot. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the utility model will be further described below.

[0020] like Figures 1 to 2 As shown, a general-purpose cabin work ladder includes a rear ladder frame 2, a front ladder frame 15, and an upper ladder frame 6 hinged to the front ladder frame 15.

[0021] The rear ladder frame 2 is equipped with a set of casters 1;

[0022] A support assembly is provided between the rear ladder 2 and the upper ladder 6. The upper ladder 6 is formed by welding rectangular tubes on both sides and a middle step 9 to approach the surface of the aircraft and enter the cockpit.

[0023] A fine-tuning component for adjusting the tilt angle of the upper ladder 6 is provided between the rear ladder 2 and the front ladder 15.

[0024] This working ladder effectively solves the problem of non-interoperability of existing main combat aircraft cockpit working ladders. Each component is assembled and welded from aluminum profiles, resulting in low processing costs. The overall structure is simple, lightweight, and can be quickly folded, making it highly operable. By coarse adjustment of the support points and fine adjustment of the adjusting screw 5, the top step 9 is ensured to be close to the edge of the cockpit, meeting the needs of air and ground crew personnel of different aircraft models to enter the cockpit and achieving universal support across multiple aircraft types.

[0025] A support rod 3 is provided between the rear ladder frame 2 and the front ladder frame 15 to achieve connection. The support rod 3 is an aluminum tube. The rear ladder frame 2 is formed by welding rectangular tubes and square tubes and is used for rear support.

[0026] The support rod 3 is connected to the rear ladder frame 2 and the front ladder frame 15 by quick-release pins 17, which facilitates folding.

[0027] The aforementioned moving wheel 1 consists of two directional wheels and is used for short-distance movement of the working ladder.

[0028] like Figure 1 As shown, the support assembly includes lugs 4 on both the rear ladder frame 2 and the upper ladder frame 6, adjusting screws 5 on the two sets of lugs 4, several sets of clamps 7 and footboards 9 on the upper ladder frame 6, and handrails 8 between the two sets of clamps 7. The adjusting screws 5 consist of screws at both ends and a screw sleeve in the middle, connected by positive and negative threads, and the extension and retraction length of the screws can be adjusted by the positive and negative threads.

[0029] The handrail 8 is formed by bending aluminum tubes and is fixedly connected to the upper ladder frame 6 by clamps 7.

[0030] like Figure 1 As shown, the fine-tuning component includes hinge point 10 on the upper ladder frame 6 and the front ladder frame 15, hinge point 11 between the rear ladder frame 2 and the front ladder frame 15, support point 12, support point 13, and support point 14 on the rear ladder frame 2. After connecting to the lug 4 via the adjusting screw 5, it is connected to the rear ladder frame 2 to form a stable support.

[0031] The bottom end of the front ladder frame 15 is provided with a spiral support foot 18, which is mainly composed of a screw and a support foot.

[0032] like Figure 1 As shown, in practical applications, the front ladder frame 15 is provided with several sets of equally spaced steps 16. The front ladder frame 15 is formed by welding rectangular tubes to the steps 16 for front support and for people to climb.

[0033] Operating instructions:

[0034] 1. Deploy the universal cabin work ladder to Figure 1 After the working state is shown, lift the front ladder frame 15 to tilt the working ladder backward until the moving wheel 1 touches the bottom, and the general-purpose cabin working ladder can be moved a short distance.

[0035] 2. After moving the work ladder to the designated working position, adjust the spiral support feet 18 to ensure the general-purpose work ladder is stably supported;

[0036] 3. Adjust the tilt angle of the upper ladder frame 6 by adjusting the connection between the lug 4 and the three support points on the top of the rear ladder frame 2: support point 12, support point 23, and support point 34. This indirectly adjusts the ground clearance of the top step 9 of the upper ladder frame 6 to meet the needs of different aircraft cabin heights. After the upper ladder frame 6 is connected to one of the three support points on the top of the rear ladder frame 2 via the lug 4, the tilt angle of the upper ladder frame 6 is finely adjusted by adjusting the length of the fine-tuning screw 5 to ensure that the height of the top step 9 of the upper ladder frame 6 is appropriate with the edge of the cabin. Finally, the universal cabin working ladder can be brought close to the edge of the cabin for climbing and operation.

[0037] 4. After the general-purpose cabin work ladder is used, remove the bolts on one section of the adjusting screw 5 to fold the upper ladder frame 6 clockwise to the side of the front ladder frame 15, thus completing the folding of the upper ladder frame 6; the handrail 8 can be removed by opening the clamp 7; by removing the quick-release pin 17 on one section of the support rod 3, the rear ladder frame 2 and the front ladder frame 15 can be brought together to complete the folding of the entire work ladder; the folded state is as follows. Figure 2 As shown.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A universal cockpit working ladder, comprising a rear ladder frame (2) and a front ladder frame (15), and an upper ladder frame (6) hinged to the front ladder frame (15), characterized in that: a set of moving wheels (1) is arranged on the rear ladder frame (2); a support assembly is arranged between the rear ladder frame (2) and the upper ladder frame (6); a fine adjustment assembly for adjusting the inclination angle of the upper ladder frame (6) is arranged between the rear ladder frame (2) and the front ladder frame (15).

2. A universal cockpit access ladder as in claim 1, wherein: a support rod (3) for connection is arranged between the rear ladder frame (2) and the front ladder frame (15).

3. A universal cockpit access ladder as in claim 2, wherein: the support rod (3) is connected to the rear ladder frame (2) and the front ladder frame (15) through quick-release pins (17).

4. A universal cockpit access ladder as in claim 1, wherein: the moving wheels (1) are composed of two directional wheels.

5. A universal cockpit access ladder as in claim 1, wherein: the support assembly comprises lugs (4) arranged on the rear ladder frame (2) and the upper ladder frame (6), adjusting screws (5) arranged on the two sets of lugs (4), a plurality of sets of clamps (7) and steps (9) arranged on the upper ladder frame (6), and handrails (8) arranged between the two sets of clamps (7).

6. A universal cockpit access ladder as in claim 1, wherein: the fine adjustment assembly comprises a hinge point one (10) arranged on the upper ladder frame (6) and the front ladder frame (15), a hinge point two (11) arranged between the rear ladder frame (2) and the front ladder frame (15), support points one (12), two (13) and three (14) arranged on the rear ladder frame (2).

7. A universal cockpit access ladder as in claim 1, wherein: the bottom end of the front ladder frame (15) is provided with a spiral support foot (18).

8. A universal cockpit access ladder as in claim 1, wherein: a plurality of sets of equally spaced steps (16) are arranged on the front ladder frame (15).

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