Aircraft working ladder adaptive to aircraft interface

Abstract

The utility model discloses an aircraft working ladder adaptive to an aircraft interface, which comprises a connecting component and a ladder tube component, one end of the connecting component is hinged with the ladder tube component through a second pin shaft, and the connecting component and the ladder tube component are locked through a ladder tube limiting pin; the connecting assembly comprises a first connecting rod, a second connecting rod, a hanging lug assembly and a connecting plate. An end cover at one end of the connecting plate is hinged to the first connecting rod and the second connecting rod through first pin shafts. The opposite sides of the first connecting rod and the second connecting rod are locked through a drawing pin assembly, and the other sides of the first connecting rod and the second connecting rod are each provided with a hanging lug assembly. Locking shafts are arranged at the bottom of the first connecting rod and the bottom of the second connecting rod respectively, a self-locking mechanism is correspondingly arranged on the connecting plate, and inserting lock holes are correspondingly formed in the two sides of the connecting plate respectively so that the locking shafts can be inserted into the self-locking mechanism, and automatic locking is achieved. Flexible hanging is achieved through the connecting assemblies, and folding arrangement of the connecting assemblies and the ladder pipe assemblies can be achieved; the utility model has the advantages of miniaturization, light weight and smooth connection.

Description

Technical Field

[0001] This utility model belongs to the technical field of aircraft ladders, specifically relating to an aircraft working ladder adapted to an aircraft interface. Background Technology

[0002] Aircraft ladders are used to enable pilots to autonomously enter and exit the cockpit without ground crew, achieving high load-bearing capacity while controlling weight and size. Existing aircraft ladders require integral installation within the limited space of the cockpit, necessitating miniaturization. Current aircraft ladders are often foldable, with no loose parts when folded. A ladder that is easy to fold and unfold allows pilots to quickly unfold it from within the cockpit and use it for entry and exit without ground crew assistance. The ladder tubes are telescopic and foldable, with a folding-to-unfolding ratio of over 8 times. The folded size meets cockpit installation requirements; and the entire ladder connects to the aircraft via a mounting base, with connecting accessories secured to the connecting assembly via ropes, ensuring no loose parts.

[0003] For example, existing patent CN220363468U discloses a portable cabin ladder, which includes a cabin ladder and a mounting frame. The cabin ladder includes a connecting assembly and a telescopic ladder. The connecting assembly includes a connector, a connecting plate, and a support plate. One end of the connector is hinged to one end of the connecting plate, and the other end of the connecting plate is connected to one end of the support plate via a second quick-release pin and a pin shaft. A first ear plate is fixedly provided on the other end of the support plate. The telescopic ladder includes N ladder tubes that are sequentially nested and slidably connected from the outside to the inside. A second ear plate is fixedly provided on the top of the telescopic ladder, and the second ear plate is connected to the first ear plate via a pin shaft. A step is provided on the telescopic ladder. A traction strap is provided on the top surface of the support plate. One end of the traction strap is fixed to the support plate, and the other end passes through the N ladder tubes and is fixedly connected to the inner bottom surface of the telescopic ladder. In the retracted state, the N ladder tubes of the cabin ladder are folded with the connecting assembly and placed on the mounting frame for fixation. Utility Model Content

[0004] The purpose of this utility model is to provide an aircraft working ladder that is compatible with aircraft interfaces. It can be flexibly mounted through connecting components, and the connecting components and ladder tube components can be folded for easy carrying and use.

[0005] This utility model is mainly achieved through the following technical solutions:

[0006] An aircraft working ladder adapted to an aircraft interface includes a connecting assembly and a ladder tube assembly. One end of the connecting assembly is hinged to the ladder tube assembly via a second pin, and the connecting assembly and the ladder tube assembly are locked together by a ladder tube limiting pin. The connecting assembly includes a first connecting rod, a second connecting rod, a lug assembly, and a connecting plate. The end cap of one end of the connecting plate is hinged to the first connecting rod and the second connecting rod via the first pin. The opposite sides of the first and second connecting rods are locked by a pull pin assembly, and the other sides are respectively provided with lug assemblies. The bottom of the first and second connecting rods are respectively provided with locking shafts, and the connecting plate is correspondingly provided with a self-locking mechanism. The two sides of the connecting plate are respectively provided with insertion locking holes for the locking shafts to be inserted into the self-locking mechanism to achieve automatic locking.

[0007] To better realize this utility model, the ladder tube assembly further includes a plurality of ladder tubes that are slidably sleeved from the outside to the inside. The end of each ladder tube is provided with a footboard or baffle. The upper edge protrusion of each ladder tube presses against the baffle or footboard protrusion of the upper ladder tube to achieve a limiting position. The first ladder tube of the ladder tube assembly is hinged to the connecting plate through a second pin and locked by a ladder tube limiting pin. The top of the first ladder tube is provided with a ladder tube locking assembly, which is used to insert into the top pin hole of the last ladder tube to prevent the ladder tube from loosening.

[0008] To better realize this utility model, it further includes a pull belt, and a pedal is provided at the bottom of the final ladder tube. One end of the pull belt is connected to the connecting component, and the other end is connected to the pedal at the bottom of the final ladder tube, so as to realize the retraction of the ladder tube by pulling the pull belt.

[0009] To better realize this utility model, it further includes a ladder tube support assembly disposed on one side of the first-stage ladder tube. The ladder tube support assembly includes a support assembly, a left mounting plate, a right mounting plate, and an angle adjustment lock pin. Left and right mounting plates are respectively disposed on the left and right sides of the first-stage ladder tube, and the two sides of the ladder tube support assembly are respectively connected to the left and right mounting plates through the angle adjustment lock pin.

[0010] To better realize this utility model, the ear assembly is further connected to the first or second connecting rod via a threaded shaft.

[0011] To better realize this utility model, the ear assembly is further connected to the upper mounting interface of the aircraft, and the contact part between the ear assembly and the aircraft is made of rubber.

[0012] To better realize this utility model, the connecting plate is further provided with a locking pin, which is used to lock the ladder tube after the ladder tube is tightened and flipped.

[0013] To better realize this utility model, the self-locking mechanism further includes a roller, a torsion spring, and an unlocking rocker arm. The two ends of the roller are rotatably connected to the connecting plate through a third pin, and the two ends of the roller are respectively fitted with torsion springs. An unlocking rocker arm is provided on one side of the roller, and a locking pin is provided on the other side corresponding to the lock hole. The unlocking rocker arm is used to rotate the roller and drive the locking pin to rotate out of the insertion lock hole to unlock the locking shaft. The torsion spring is used to reset the roller and make the locking pin rotate into the insertion lock hole to lock the locking shaft.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) In use, the connecting components and ladder tube components of this utility model are easy to fold and unfold. Pilots can quickly unfold the working ladder inside the cockpit and use it to enter and exit the cockpit without the assistance of ground crew. This utility model has the technical advantages of miniaturization, light weight, quick operation by a single person, smooth connection, and long service life. Specifically, the entire utility model can be connected to the aircraft through the mounting base, and the connecting accessories are connected to the connecting components by ropes to ensure that there are no loose parts. Furthermore, the ladder tube component is telescopic and foldable, and the folding and unfolding telescopic ratio can reach more than 8 times. The size after folding meets the cockpit installation requirements. This utility model ensures no jamming by controlling the gap between each level of ladder tube and the roughness and precision between the contact surfaces.

[0016] (2) The mounting lug assembly connects to the upper mounting interface of the aircraft. The contact area between the mounting lug assembly and the aircraft is made of rubber to prevent damage to the aircraft. Preferably, the contact surfaces of the mounting lug assembly and the aircraft are provided with a vulcanized 5870 rubber layer. This material has a high coefficient of friction and cushioning ability, and will not cause damage or dirt to the aircraft surface during operation. The main body of the connecting assembly can be made of 7050 aluminum alloy, and the main body of the ladder tube assembly can be made of TC-6 titanium alloy, which further controls the weight while ensuring strength, meeting the requirements of airborne and single-person operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the folded structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model in its mounted and undeployed state;

[0019] Figure 3 This is a schematic diagram of the structure of the tensioning tape;

[0020] Figure 4 This is a structural diagram of the connecting components;

[0021] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0022] Figure 6 This is a side view of the connecting component.

[0023] Figure 7 for Figure 6 Schematic diagram of the structure in the C-direction;

[0024] Figure 8 This is a schematic diagram of the structure of this utility model in its mounted and deployed state;

[0025] Figure 9 for Figure 8 The main view;

[0026] Figure 10 This is a schematic diagram of the structure of the first-stage ladder tube;

[0027] Figure 11 This is a rear view of the ladder tube support assembly;

[0028] Figure 12 This is a schematic diagram of the connection structure between the ladder tube support assembly and the left and right mounting plates.

[0029] Wherein: 1-Connecting assembly, 11-First connecting rod, 12-Second connecting rod, 13-Connecting plate, 14-Hook assembly, 15-Threaded shaft, 16-End cap, 17-Locking shaft, 18-Pull pin assembly, 19-Locking pin, 20-Self-locking mechanism

[0030] 2-Ladder tube assembly, 21-Ladder tube limit pin, 22-Ladder tube, 23-Step, 24-Baffle, 25-Ladder tube locking assembly

[0031] 3-Ladder tube support assembly, 31-Angle adjustment lock pin, 32-Support assembly, 34-Left mounting plate, 35-Right mounting plate.

[0032] 4-Pulling belt, 5-First pin, 6-Second pin, 7-Third pin. Detailed Implementation

[0033] Example 1:

[0034] An aircraft work ladder adapted to aircraft interfaces, such as Figure 1 , Figure 2 , Figure 8 and Figure 9As shown, the connecting component 1 is connected to the ladder tube assembly 2 via the second pin 6, enabling the ladder tube assembly 2 to rotate. The ladder tube assembly 2 includes several ladder tubes 22 that are slidably fitted from the outside to the inside. Each ladder tube 22 has a footplate 23 or a baffle 24 at its end. The upper edge protrusion of each ladder tube 22 presses against the baffle 24 or the protrusion of the footplate 23 of the upper ladder tube 22 to achieve a limiting position. The first ladder tube 22 of the ladder tube assembly 2 is hinged to the connecting plate 13 via the second pin 6 and locked by the ladder tube limiting pin 21. The top of the first ladder tube 22 is provided with a ladder tube locking component 25, which is used to insert into the top pin hole of the last ladder tube 22 to prevent the ladder tube 22 from loosening.

[0035] Preferably, such as Figure 3 As shown, it also includes a pull belt 4. The bottom of the final ladder tube 22 is provided with a pedal 23. One end of the pull belt 4 is connected to the connecting component 1, and the other end is connected to the pedal 23 at the bottom of the final ladder tube 22, so as to realize the retraction of the ladder tube 22 by pulling the pull belt 4.

[0036] Preferably, such as Figures 10-12 As shown, it also includes a ladder tube support assembly 3 disposed on one side of the first-stage ladder tube 22. The ladder tube support assembly 3 includes a support assembly 32, a left mounting plate 34, a right mounting plate 35, and an angle adjustment lock pin 31. Left and right mounting plates 35 are respectively disposed on the left and right sides of the first-stage ladder tube 22. The two sides of the ladder tube support assembly 3 are connected to the left and right mounting plates 35 respectively through the angle adjustment lock pin 31.

[0037] Preferably, such as Figures 2-7 As shown, the connecting assembly 1 includes a first connecting rod 11, a second connecting rod 12, a lug assembly 14, and a connecting plate 13. The end cap 16 at one end of the connecting plate 13 is hinged to the first connecting rod 11 and the second connecting rod 12 via a first pin 5. The opposite side of the first connecting rod 11 and the second connecting rod 12 is locked by a pull pin assembly 18, and the other side is provided with a lug assembly 14. Locking shafts 17 are respectively provided at the bottom of the first connecting rod 11 and the second connecting rod 12. A self-locking mechanism 20 is correspondingly provided on the connecting plate 13, and insertion locking holes are correspondingly provided on both sides of the connecting plate 13 for the locking shaft 17 to be inserted into the self-locking mechanism 20 to achieve automatic locking. Specifically, a locking pin 19 is also provided on the connecting plate 13, which is used to insert into the locking hole of the ladder tube 22 after the ladder tube 22 is tightened and flipped to complete the locking.

[0038] Preferably, the self-locking mechanism 20 includes a roller, a torsion spring, and an unlocking rocker arm. The two ends of the roller are rotatably connected to the connecting plate 13 via a third pin 7, and a torsion spring is sleeved on each end of the roller. An unlocking rocker arm is provided on one side of the roller, and a locking pin is provided on the other side corresponding to the lock hole. The unlocking rocker arm is used to rotate the roller and drive the locking pin to rotate out of the insertion lock hole, thereby unlocking the locking shaft 17. The torsion spring is used to reset the roller, causing the locking pin to rotate into the insertion lock hole, thereby locking the locking shaft 17.

[0039] Specifically, the ladder tube assembly 2 includes eight ladder tubes 22 that are slidably fitted from the outside to the inside, and the bottom of the last ladder tube 22 is provided with eight steps 23. Figure 3 As shown, one end of the pull belt 4 is connected to the connecting component 1, and the other end is connected to the eight-step tread 23. The ladder tube 22 can be retracted by pulling the pull belt 4.

[0040] The first-stage ladder tube 22 of the ladder tube assembly 2 is connected to the connecting assembly 1 via the second pin 6, enabling rotation. When in use, the ladder tube 22 is secured by a ladder tube limiting pin 21 inserted into it, restricting rotation. The ladder tube support assembly 3 is positioned in the middle of the aircraft, further enhancing the load-bearing capacity of the ladder tube 22. The ladder tube support assembly 3 can be adjusted via left and right mounting plates 35 to accommodate structural deviations in the middle of different aircraft batches. Each stage of the ladder tube 22 is inserted into the pedal 23 or baffle 24, and a pin is pressed between the ladder tube 22 and the pedal 23 or baffle 24 to achieve connection between each stage. The ladder tube 22 employs a fitting structure; when extended, the upper edge protrusion of each stage of the ladder tube 22 presses against the protrusion of the baffle 24 or pedal 23 for limiting; when the ladder tube 22 retracts, the ladder tube locking assembly 25 is inserted into the top pin hole of the last stage of the ladder tube 22 to prevent it from loosening.

[0041] In use, after being mounted on an aircraft, pulling the ladder tube locking assembly 25 on the ladder tube assembly 2 releases the eighth ladder tube 22, and all ladder tubes 22 automatically unfold under gravity. The upper hanging lug assembly 14 of the working ladder matches the aircraft locking seat, and the ladder tube support assembly 3 adapts to the middle structure of the aircraft. Specifically, the hanging lug assembly 14 is connected to the upper mounting interface of the aircraft, and the contact part of the hanging lug assembly 14 with the aircraft is made of rubber to prevent damage to the aircraft. The hanging lug assembly 14 is connected to the first connecting rod 11 or the second connecting rod 12 through the threaded shaft 15 to achieve rotation, which reduces the folded storage size when folded.

[0042] like Figure 3 , Figure 4 and Figure 7As shown, when unfolded, the first connecting rod 11 and the second connecting rod 12 are hinged to the end cap 16 of the connecting plate 13 via the first pin 5, enabling rotation and being limited by the end face. After the first connecting rod 11 and the second connecting rod 12 are rotated to their positions, the pull pin assembly 18 locks the first connecting rod 11 and the second connecting rod 12 to prevent them from disengaging during use. Locking shafts 17 are respectively provided on the bottom sides of the first connecting rod 11 and the second connecting rod 12, and a self-locking mechanism 20 is correspondingly provided on the connecting plate 13, with locking holes on both sides of the self-locking mechanism 20. When the first connecting rod 11 and the second connecting rod 12 are folded, the pull pin assembly 18 is unlocked, and the locking shaft 17 is inserted into the self-locking mechanism 20 to achieve automatic locking.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An aircraft working ladder adapted to an aircraft interface, characterized in that, The system includes a connecting component (1) and a ladder tube assembly (2). One end of the connecting component (1) is hinged to the ladder tube assembly (2) via a second pin (6), and the connecting component (1) and the ladder tube assembly (2) are locked together by a ladder tube limiting pin (21). The connecting component (1) includes a first connecting rod (11), a second connecting rod (12), a lug assembly (14), and a connecting plate (13). The end cap (16) at one end of the connecting plate (13) is hinged to the first connecting rod (11) and the second connecting rod (12) via a first pin (5). Link (12); the first link (11) and the second link (12) are locked on opposite sides by a pull pin assembly (18), and the other side is provided with a hanging ear assembly (14); the bottom of the first link (11) and the second link (12) are respectively provided with a locking shaft (17), the connecting plate (13) is correspondingly provided with a self-locking mechanism (20), and the two sides of the connecting plate (13) are respectively provided with a plug-in locking hole so that the locking shaft (17) can be inserted into the self-locking mechanism (20) to achieve automatic locking.

2. The aircraft working ladder adapted to an aircraft interface according to claim 1, characterized in that, The ladder tube assembly (2) includes several ladder tubes (22) that are slidably fitted from the outside to the inside. Each ladder tube (22) has a footboard (23) or a baffle (24) at its end. The upper edge protrusion of each ladder tube (22) presses against the baffle (24) or the protrusion of the footboard (23) of the upper ladder tube (22) to achieve a limit. The first ladder tube (22) of the ladder tube assembly (2) is hinged to the connecting plate (13) through the second pin (6) and locked by the ladder tube limiting pin (21). The top of the first ladder tube (22) is provided with a ladder tube locking assembly (25). The ladder tube locking assembly (25) is used to insert into the top pin hole of the last ladder tube (22) to prevent the ladder tube (22) from loosening.

3. An aircraft working ladder adapted to an aircraft interface according to claim 2, characterized in that, It also includes a traction cloth belt (4), and a foot pedal (23) is provided at the bottom of the final ladder tube (22). One end of the traction cloth belt (4) is connected to the connecting component (1), and the other end is connected to the foot pedal (23) at the bottom of the final ladder tube (22), so as to realize the retraction of the ladder tube (22) by pulling the cloth belt (4).

4. An aircraft working ladder adapted to an aircraft interface according to claim 2, characterized in that, It also includes a ladder tube support assembly (3) set on one side of the first ladder tube (22). The ladder tube support assembly (3) includes a support assembly (32), a left mounting plate (34), a right mounting plate (35) and an angle adjustment lock pin (31). The left and right sides of the first ladder tube (22) are respectively provided with left and right mounting plates (35). The two sides of the ladder tube support assembly (3) are respectively connected to the left and right mounting plates (35) through the angle adjustment lock pin (31).

5. An aircraft working ladder adapted to an aircraft interface according to claim 1, characterized in that, The ear-mount assembly (14) is connected to the first link (11) or the second link (12) via a threaded shaft (15).

6. An aircraft working ladder adapted to an aircraft interface according to claim 1 or 5, characterized in that, The ear-mount assembly (14) is connected to the upper mounting interface of the aircraft, and the contact part between the ear-mount assembly (14) and the aircraft is made of rubber.

7. An aircraft working ladder adapted to an aircraft interface according to claim 1, characterized in that, The connecting plate (13) is also provided with a locking pin (19), which is used to insert the locking pin (19) into the locking hole of the ladder tube (22) to complete the locking after the ladder tube (22) is tightened and flipped.

8. An aircraft working ladder adapted to an aircraft interface according to claim 1, characterized in that, The self-locking mechanism (20) includes a roller, a torsion spring and an unlocking rocker arm. The two ends of the roller are rotatably connected to the connecting plate (13) through a third pin (7), and the two ends of the roller are respectively fitted with torsion springs. An unlocking rocker arm is provided on one side of the roller, and a locking pin is provided on the other side corresponding to the lock hole. The unlocking rocker arm is used to rotate the roller and drive the locking pin to rotate out of the insertion lock hole to unlock the locking shaft (17). The torsion spring is used to reset the roller so that the locking pin can rotate into the insertion lock hole to lock the locking shaft (17).

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