Aircraft maintenance working ladder

Abstract

The utility model relates to the technical field of working ladders, in particular to an aircraft maintenance working ladder. The maintenance platform can meet the maintenance requirements of different heights around an airplane and is more stable when being used as a maintenance platform; comprising a working platform, a supporting leg assembly, a first ladder assembly and a second ladder assembly, the supporting leg assembly and the first ladder assembly are oppositely installed on the two sides of the bottom of the working platform respectively, a handrail frame is fixedly installed on the top of the working platform, an L-shaped connecting piece is fixedly installed on the handrail frame, and the top of the second ladder assembly is hinged to the L-shaped connecting piece; a first connecting supporting piece detachably connected with the supporting leg assembly is mounted on the first ladder frame; the first connecting supporting piece comprises a rod body fixedly connected with the second ladder frame and a first elastic clamping piece fixedly mounted on the rod body, and the first elastic clamping piece comprises an elastic ring clamp and an opening formed in the elastic ring clamp; each of the first ladder frame and the second ladder frame comprises a rod frame and a plurality of first steps mounted on the rod frame, and second steps are mounted on the backs of the first steps on the second ladder frame.

Description

Technical Field

[0001] This utility model relates to the technical field of work ladders, and in particular to an aircraft maintenance work ladder. Background Technology

[0002] Aircraft inspection and maintenance is a critical link in ensuring aviation safety, involving system inspection, troubleshooting and preventive maintenance. Due to the large size of aircraft, working ladders are often used as access tools during maintenance.

[0003] For example, Chinese utility model patent application CN216197791U discloses a foldable aircraft maintenance ladder. It includes a ladder frame, a work platform, and a support leg assembly. The ladder frame is connected to one side of the bottom of the work platform, and the support leg assembly is rotatably connected to the other side of the work platform. The support leg assembly and the ladder frame are arranged opposite to each other, and both are supported on the ground. It can be quickly folded without disassembling the ladder frame, reducing the volume occupied and simplifying operation.

[0004] However, the above-mentioned device still has the following defects: when performing aircraft maintenance and repair work, it is necessary to carry out maintenance and repair at different heights around the aircraft. The operating platform of the above-mentioned device has a fixed height position, which makes it difficult to meet the maintenance needs at higher positions around the aircraft. The placement stability of the working ladder when working on the working platform needs to be further improved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an aircraft maintenance work ladder that meets the maintenance needs at different heights around an aircraft and is more stable when used as a maintenance platform.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an aircraft maintenance work ladder, comprising a work platform, outrigger assemblies, a first ladder frame, and a second ladder frame. The outrigger assemblies and the first ladder frame are respectively installed opposite to each other on both sides of the bottom of the work platform. A handrail frame is fixedly installed on the top of the work platform, and an L-shaped connector is fixedly installed on the handrail frame. The top of the second ladder frame is hinged to the L-shaped connector. A first connecting support member, detachably connected to the outrigger assemblies, is installed on the first ladder frame. Furthermore, when the second ladder frame is used as a climbing tool to the work platform, the first connecting support member connects the bottom of the second ladder frame and the outrigger assemblies as a single unit, at which point the second ladder frame and the outrigger assemblies are in a parallel state. When the work ladder is used as a maintenance platform, the bottoms of the first ladder frame, the second ladder frame, and the outrigger assemblies are located on the same horizontal plane and in contact with the ground. The first ladder frame and the outrigger assemblies are arranged in a V-shape.

[0007] Preferably, the first connecting support includes a rod body fixedly connected to the second ladder frame and a first elastic clip fixedly installed on the rod body. The first elastic clip includes an elastic ring clip and an opening provided on the elastic ring clip. Further, the elastic ring clip is a plastic ring or a metal ring with a certain degree of plasticity and toughness. The inner diameter of the elastic ring clip on the first connecting support is matched with the outer diameter of the handrail frame, and the width of the opening is smaller than the diameter of the handrail frame.

[0008] Preferably, both the first and second ladders include a frame and multiple first steps mounted on the frame, and a second step is mounted on the back of the first step on the second ladder. Furthermore, the number of second steps in the attached drawings is three sets, which should not be interpreted as a limitation on the number of first steps. The number of first steps can be appropriately increased or decreased according to the height of the work platform, and the spacing between the multiple sets of second steps is equal.

[0009] Preferably, the system also includes a connecting rod and a limiting bolt. One end of the second step is hinged to the corresponding first step on the second ladder frame, and the other ends of multiple sets of second steps are all hinged to the connecting rod. A slide is fixedly installed on the first step on the second ladder frame, and the slide has an arc-shaped groove. The limiting bolt passes through the arc-shaped groove and is screwed onto the first step. The first step and the second step are locked together by the limiting bolt. Furthermore, the number of first steps and second steps in the attached drawings is three sets, which should not be interpreted as a limitation on the number of first steps and second steps in this case. The number of first steps and second steps can be appropriately increased or decreased according to the height of the work platform. The spacing between multiple sets of first steps and multiple sets of second steps is equal.

[0010] Preferably, a second connecting support is installed on the second ladder frame. The second connecting support includes a second elastic clip with the same structure as the first elastic clip and a telescopic adjustment component. The telescopic adjustment component includes an internal threaded cylinder and adjusting screws screwed onto both sides of the internal threaded cylinder. The two adjusting screws are respectively hinged to the second ladder frame and the second elastic clip. Furthermore, the internal threads of the internal threaded cylinder at the contact points with the two adjusting screws are reverse-threaded. When the second ladder frame is used as a tool for further upward climbing, the elastic ring on the second elastic clip is secured to the handrail frame.

[0011] Preferably, the leg assembly includes a leg frame and a base mounted on the bottom of the leg frame.

[0012] Preferably, a lifting screw is screwed onto the base, and a caster wheel is installed at the bottom of the lifting screw; further, a rotating rod or a hand crank is provided at the top of the lifting screw to facilitate rotation and adjustment of the lifting screw.

[0013] Preferably, the work platform, the first step, and the second step are all provided with anti-slip protrusions.

[0014] Compared with the prior art, this utility model provides an aircraft maintenance work ladder with the following advantages: When the work ladder is used as a maintenance platform, the second ladder is parallel to the first ladder, and the first connecting support connects the bottom of the second ladder and the support leg assembly as one unit. The bottoms of the first ladder, the second ladder, and the support leg assembly are all in contact with the ground. At this time, the second ladder can serve as a climbing ladder to the work platform and as an auxiliary support for the maintenance platform. With the auxiliary support of the second ladder, the work ladder can be effectively prevented from shifting on its own, improving the stability of operations on the work platform and greatly improving operational safety. When maintenance and repair are required around the aircraft, the second ladder can be rotated and adjusted so that the bottom of the second ladder rotates to the top, and the second ladder is placed on the outer wall of the aircraft. Operators can climb up from the second ladder to perform maintenance and repair at higher points around the aircraft, meeting the maintenance needs at different heights around the aircraft. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention in use as a maintenance platform;

[0016] Figure 2 This is a schematic diagram of the planar structure of this utility model when used as a maintenance platform;

[0017] Figure 3 This is a three-dimensional structural diagram of the second ladder frame of this utility model in use as a height-increasing climbing tool;

[0018] Figure 4 This is the utility model Figure 3 A magnified view of the structure at point A in the middle;

[0019] The following are labels in the attached diagram: 1. Working platform; 2. First ladder frame; 3. Second ladder frame; 4. Handrail frame; 5. L-shaped connector; 6. Rod body; 7. Elastic ring clamp; 8. Opening; 9. Rod frame; 10. First step; 11. Second step; 12. Connecting rod; 13. Limit bolt; 14. Slide; 15. Arc-shaped slide groove; 16. Internal threaded cylinder; 17. Adjusting screw; 18. Leg frame; 19. Base; 20. Lifting screw; 21. Caster wheel; 22. Anti-slip protrusion. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] As described in the background art, a foldable aircraft maintenance ladder is used when performing aircraft maintenance and repair work. It is necessary to carry out maintenance and repair work at different heights around the aircraft. The operating platform of the above-mentioned device has a fixed height position, which makes it difficult to meet the maintenance needs of higher positions around the aircraft. The placement stability of the ladder when working on the platform needs to be further improved.

[0022] To solve this technical problem, this utility model provides an aircraft maintenance work ladder, which is used for aircraft maintenance and repair.

[0023] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example 1

[0026] Please refer to Figure 1-3 An aircraft maintenance work ladder includes a work platform 1, outrigger assemblies, a first ladder frame 2, and a second ladder frame 3. The outrigger assemblies and the first ladder frame 2 are respectively installed opposite each other on the bottom sides of the work platform 1. A handrail frame 4 is fixedly installed on the top of the work platform 1, and an L-shaped connector 5 is fixedly installed on the handrail frame 4. The top of the second ladder frame 3 is hinged to the L-shaped connector 5. A first connecting support member, detachably connected to the outrigger assembly, is installed on the first ladder frame 2. Furthermore, when the second ladder frame 3 is used as a climbing tool to the work platform 1, the first connecting support member connects the bottom of the second ladder frame 3 and the outrigger assembly as one unit, at which time the second ladder frame 3 and the outrigger assembly are in a parallel state. When the work ladder is used as a maintenance platform, the bottom of the first ladder frame 2, the second ladder frame 3, and the outrigger assembly are located on the same horizontal plane and in contact with the ground. The first ladder frame 2 and the outrigger assembly are arranged in a V-shape.

[0027] For details, please refer to Figure 2 The outrigger assembly includes a leg frame 18 and a base 19 mounted on the bottom of the leg frame 18.

[0028] For details, please refer to Figure 2 A lifting screw 20 is screwed onto the base 19, and a caster wheel 21 is installed at the bottom of the lifting screw 20. Furthermore, a rotating rod or hand crank is provided on the top of the lifting screw 20 to facilitate the rotation and adjustment of the lifting screw 20.

[0029] For details, please refer to Figure 1The first connecting support includes a rod 6 fixedly connected to the second ladder frame 3 and a first elastic clip fixedly installed on the rod 6. The first elastic clip includes an elastic ring clip 7 and an opening 8 provided on the elastic ring clip 7. Further, the elastic ring clip 7 is a plastic ring or a metal ring with a certain plasticity and toughness. The inner diameter of the elastic ring clip 7 on the first connecting support matches the outer diameter of the handrail frame 4, and the width of the opening 8 is smaller than the diameter of the handrail frame 4.

[0030] The aircraft maintenance work ladder provided in this embodiment has a base 19 that increases the contact area between the bottom of the leg frame 18 and the ground, further improving the placement stability of the work ladder when used as a maintenance platform. When the work ladder needs to be moved, the lifting screw 20 is rotated, which drives the caster wheel 21 to move down until the bottom of the base 19 is separated from the ground. At this time, the first ladder frame 2 is lifted up, and the work ladder can be moved as a whole to improve the ease of movement of the work ladder. By pressing the second ladder frame 3 on the leg frame 18, the leg frame 18 enters the elastic ring 7 from the opening 8. Similarly, by pulling the second ladder frame 3 to the side away from the leg frame 18, the leg frame 18 moves out of the elastic ring 7, thus realizing the quick assembly and disassembly between the second ladder frame 3 and the leg assembly.

[0031] Example 2

[0032] The aircraft maintenance work ladder provided in Example 1 has been further optimized. For details, please refer to... Figures 2-3 The first ladder 2 and the second ladder 3 both include a frame 9 and multiple first steps 10 mounted on the frame 9. The back of the first steps 10 on the second ladder 3 is equipped with a second step 11. Furthermore, the number of first steps 10 and second steps 11 in the attached drawings of this case is three sets, which should not be interpreted as a limitation on the number of first steps 10 and second steps 11 in this case. The number of first steps 10 and second steps 11 can be appropriately increased or decreased according to the height of the work platform 1. The spacing between the multiple sets of first steps 10 and multiple sets of second steps 11 is equal.

[0033] Specifically, the work platform 1, the first step 10 and the second step 11 are all provided with anti-slip protrusions 22; the anti-slip protrusions 22 can increase the friction at the work platform 1, the first step 10 and the second step 11 and reduce the risk of slipping.

[0034] For details, please refer to Figure 4It also includes a connecting rod 12 and a limiting bolt 13. One end of the second step 11 is hinged to the corresponding first step 10 on the second ladder frame 3. The other ends of multiple sets of second steps 11 are all hinged to the connecting rod 12. A slide 14 is fixedly installed on the first step 10 on the second ladder frame 3. The slide 14 is provided with an arc-shaped slide groove 15. The limiting bolt 13 passes through the arc-shaped slide groove 15 and is screwed onto the first step 10. The first step 10 and the second step 11 are locked together by the limiting bolt 13. Furthermore, the second step 11 is hinged to the first step 10 on the second ladder frame 3 by a hinge or hinge pin, etc. The center of the arc-shaped slide groove 15 coincides with the hinge point between the second step 11 and the corresponding first step 10.

[0035] For details, please refer to Figure 4 The second ladder 3 is equipped with a second connecting support, which includes a second elastic clip with the same structure as the first elastic clip and a telescopic adjustment component. The telescopic adjustment component includes an internal threaded cylinder 16 and adjusting screws 17 screwed on both sides of the internal threaded cylinder 16. The two adjusting screws 17 are respectively hinged to the second ladder 3 and the second elastic clip. Furthermore, the internal threads of the internal threaded cylinder 16 that contact the two adjusting screws 17 are reversed. When the second ladder 3 is used as a tool for further upward climbing, the elastic ring 7 on the second elastic clip is fixed to the handrail 4.

[0036] Please refer to the aircraft maintenance work ladder provided in this embodiment. Figure 3 When the aircraft needs to be repositioned for maintenance, the second step 11 allows operators to climb upwards more easily and safely. By rotating and adjusting one set of second steps 11, all second steps 11 rotate synchronously after being transmitted through the connecting rod 12, so that the top surfaces of all second steps 11 are in a horizontal state. Then, the limiting bolts 13 are tightened to limit and fix the bottom set of second steps 11 (to... Figure 3 (For reference only); When the second ladder frame 3 is at different tilt angles, multiple second steps 11 can be adjusted synchronously, so that the top surface of the second step 11 is always in a horizontal state, thus ensuring the safety of the operator when climbing; The second connecting support can connect the second ladder frame 3 and the handrail frame 4 into one unit, preventing the second ladder frame 3 from rotating around the hinge point, thus further ensuring the safety of the operator when climbing the second ladder frame 3; By rotating the internal threaded cylinder 16, the two adjusting screws 17 can be moved closer or further apart to adaptively adjust the tilt of the second ladder frame 3, and the highest position of the operator's working surface can also be adjusted, improving the applicability of the work ladder.

[0037] The aircraft maintenance work ladder provided by this utility model is used as follows: When the work ladder is used as a maintenance platform, the second ladder 3 is parallel to the first ladder 2, and the first connecting support connects the bottom of the second ladder 3 and the support leg assembly as one unit. The bottoms of the first ladder 2, the second ladder 3, and the support leg assembly are all in contact with the ground. Operators climb to the work platform 1 via the first step 10 on the first ladder 2 or the second ladder 3 to perform maintenance work. When maintenance is required around the aircraft, the first connecting support is detached from the support leg assembly, and the second ladder 3 is rotated to... Figure 3 As shown, the second ladder 3 and the handrail 4 are connected as one unit by the second connecting support. The internal threaded cylinder 16 is rotated to adjust the tilt angle of the second ladder 3 so that the upper part of the second ladder 3 is placed on the outer wall of the aircraft. After adjusting the top surface of the second step 11 to be in a horizontal state, the second step 11 is locked by the limit bolt 13. The operator can then climb to the height of the maintenance operation by climbing the second step 11.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An aircraft maintenance work ladder, characterized in that, The system includes a work platform (1), a support leg assembly, a first ladder frame (2), and a second ladder frame (3). The support leg assembly and the first ladder frame (2) are respectively installed opposite to each other on the bottom sides of the work platform (1). A handrail frame (4) is fixedly installed on the top of the work platform (1). An L-shaped connector (5) is fixedly installed on the handrail frame (4). The top of the second ladder frame (3) is hinged to the L-shaped connector (5). A first connecting support member that is detachably connected to the support leg assembly is installed on the first ladder frame (2).

2. The aircraft maintenance work ladder according to claim 1, characterized in that, The first connecting support includes a rod (6) fixedly connected to the second ladder (3) and a first elastic clip fixedly installed on the rod (6). The first elastic clip includes an elastic ring clip (7) and an opening (8) provided on the elastic ring clip (7).

3. The aircraft maintenance work ladder according to claim 1, characterized in that, The first ladder (2) and the second ladder (3) both include a frame (9) and a plurality of first steps (10) mounted on the frame (9). The back of the first step (10) on the second ladder (3) is equipped with a second step (11).

4. The aircraft maintenance work ladder according to claim 3, characterized in that, It also includes a connecting rod (12) and a limiting bolt (13). One end of the second step (11) is hinged to the corresponding first step (10) on the second ladder frame (3). The other end of the second step (11) is hinged to the connecting rod (12). A slide (14) is fixedly installed on the first step (10) on the second ladder frame (3). The slide (14) is provided with an arc-shaped slide groove (15). The limiting bolt (13) passes through the arc-shaped slide groove (15) and is screwed onto the first step (10). The first step (10) and the second step (11) are locked together by the limiting bolt (13).

5. The aircraft maintenance work ladder according to claim 4, characterized in that, The second ladder (3) is equipped with a second connecting support. The second connecting support includes a second elastic clip with the same structure as the first elastic clip and a telescopic adjustment component. The telescopic adjustment component includes an internal threaded cylinder (16) and adjusting screws (17) screwed on both sides of the internal threaded cylinder (16). The two adjusting screws (17) are respectively hinged to the second ladder (3) and the second elastic clip.

6. The aircraft maintenance work ladder according to claim 1, characterized in that, The outrigger assembly includes a leg frame (18) and a base (19) mounted on the bottom of the leg frame (18).

7. The aircraft maintenance work ladder according to claim 6, characterized in that, A lifting screw (20) is screwed onto the base (19), and a caster wheel (21) is installed at the bottom of the lifting screw (20).

8. The aircraft maintenance work ladder according to claim 3, characterized in that, The work platform (1), the first step (10), and the second step (11) are all provided with anti-slip protrusions (22).

Images