A working ladder for aircraft maintenance

Abstract

The utility model provides a work ladder for aircraft maintenance, belonging to the field of aviation equipment technology. It comprises: a ladder frame body, a clearance cavity for making way for aircraft wheels is formed at the lower part; a main step, which is arranged on at least one side wall of the ladder frame body; a lifting frame, which is located above the ladder frame body and is provided with a standing platform; and a driving component for driving the lifting frame to rise and fall relative to the ladder frame body is provided on the ladder frame body. When the staff moves the ladder frame body to the bottom of the aircraft so that the aircraft wheels are accommodated in the clearance cavity below the ladder frame body, the first piston cylinder is started to drive the lifting frame to rise, and the height of the staff on the standing platform is increased, which has the effect of facilitating the staff to inspect parts at different heights on the aircraft.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, in particular to a working ladder used for aircraft maintenance. Background Art

[0002] With the rapid development of my country's aviation industry, the requirements for the structure, control and safety of aircraft maintenance tools (especially aircraft maintenance work ladders) are becoming increasingly higher.

[0003] At present, when inspecting and repairing parts above the wheels of aircraft, a door-shaped mobile scaffolding is usually used to cross the wheels for inspection and repair. However, there is still a large space above the wheels of aircraft, and it is often encountered that the inspection point is too high and the scaffolding height is insufficient, which makes inspection and repair inconvenient. Utility Model Content

[0004] In view of the above problems, the utility model provides a working ladder for aircraft maintenance.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0006] A working ladder for aircraft maintenance is provided, comprising:

[0007] The ladder frame body has a clearance cavity formed at the lower part for giving way to the wheels of the aircraft;

[0008] A main step, arranged on at least one side wall of the ladder frame body;

[0009] A lifting frame is located above the ladder frame body and is provided with a standing platform;

[0010] The ladder frame body is provided with a driving assembly for driving the lifting frame to rise and fall relative to the ladder frame body.

[0011] Furthermore, the driving assembly comprises:

[0012] A first connecting frame, one end of which is hinged to the ladder frame body and the other end of which is rotatably connected to a first roller, and the first roller is horizontally slidably connected to the lifting frame;

[0013] A second connecting frame, one end of which is hinged to the lifting frame, and the other end of which is rotatably connected to a second roller, and the second roller is horizontally slidably connected to the ladder frame body;

[0014] The middle portion of the first connecting frame is hinged to the middle portion of the second connecting frame;

[0015] The first piston cylinder has a cylinder body hinged to the ladder frame body, and a piston rod hinged to any connecting frame.

[0016] Furthermore, a protective plate for protecting the piston cylinder is fixedly arranged on the ladder frame body, and the protective plate is located on a side of the piston cylinder close to the yield cavity.

[0017] Furthermore, an extension step is fixedly arranged on the lifting frame, and the extension step and the main step are located on the same side of the ladder frame body. When the lifting frame is raised, the extension step is connected to the main step.

[0018] Furthermore, a plurality of movable wheels are fixedly arranged at the bottom of the ladder frame body, and the movable wheels are universal wheels. A supporting assembly for supporting the ground is arranged on the ladder frame body.

[0019] Furthermore, the supporting assembly includes a rotating plate, a supporting block and a second piston cylinder. The rotating plates are rotatably mounted on the bottoms of both ends of the ladder frame body, the moving wheels are fixedly mounted on the rotating plates, the supporting blocks are fixedly arranged on the rotating plate on one side of the moving wheels, the cylinder body of the second piston cylinder is hinged to the ladder frame body, and the piston rod is hinged to the rotating plate. The piston rod of the second piston cylinder is extended and retracted so that the supporting blocks and the moving wheels are alternately supported on the ground.

[0020] Furthermore, a protective fence is detachably provided on the edge of the standing platform of the lifting frame.

[0021] The beneficial effect of the utility model is that when the staff moves the ladder frame body to the bottom of the aircraft so that the wheels of the aircraft are accommodated in the clearance cavity below the ladder frame body, the first piston cylinder is started to drive the lifting frame to rise, thereby raising the height of the staff on the standing platform, making it convenient for the staff to inspect and repair parts at different heights on the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the working ladder of an embodiment of the present application when working.

[0023] Figure 2 This is a schematic diagram of the overall structure of the working ladder of an embodiment of the present application from an upward perspective.

[0024] Figure 3 This is a schematic diagram of the front structure of the working ladder of an embodiment of the present application.

[0025] Figure 4 It is a schematic cross-sectional view of the guardrail disassembly structure according to an embodiment of the present application.

[0026] Among them, 1. ladder frame body; 11. main step; 12. give way cavity; 2. lifting frame; 21. standing platform; 22. extension ladder; 31. first connecting frame; 32. second connecting frame; 33. first piston cylinder; 34. first roller; 35. second roller; 4. protective plate; 5. moving wheel; 61. rotating plate; 62. support block; 63. second piston cylinder; 7. guardrail; 71. plug-in part; 72. connecting sleeve; 73. locking bolt. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The present application embodiment discloses a working ladder for aircraft maintenance, referring to Figure 1 , Figure 2 , comprising a ladder frame body 1, a main ladder 11 and a lifting frame 2. The ladder frame body 1 is roughly door-shaped, so that the lower travel of the ladder frame body 1 is used to make way for the aircraft wheels. The lifting frame 2 is arranged on the top of the ladder frame body 1, and a horizontal standing platform 21 is provided on the lifting frame 2. The ladder frame body 1 is provided with a driving assembly for driving the lifting frame 2 to rise and fall relative to the ladder frame body 1. The main ladder 11 is fixed on one side wall of the ladder frame body 1, and the top of the main ladder 11 extends to the top of the ladder frame body 1. The staff can climb to the standing platform 21 of the lifting frame 2 through the main ladder 11.

[0029] Reference Figure 3 In the embodiment of the present application, the driving assembly includes a first connecting frame 31, a second connecting frame 32 and a first piston cylinder 33. The middle parts of the first connecting frame 31 and the second connecting frame 32 are hinged to each other to form an "X"-shaped structure. The ends of the first connecting frame 31 and the second connecting frame 32 on the same side are respectively rotatably connected with a first roller 34 and a second roller 35. One end of the first connecting frame 31 is hinged to the ladder frame body 1, and the first roller 34 at the other end is horizontally slidably connected to the slideway horizontally opened on the lifting frame 2. One end of the second connecting frame 32 is hinged to the lifting frame 2, and the second roller 35 at the other end is horizontally slidably connected to the slideway horizontally opened on the ladder frame body 1. The cylinder body of the first piston cylinder 33 is hinged to the ladder frame body 1, and the piston rod is hinged to any connecting frame. Through the extension and retraction of the piston rod of the first piston cylinder 33, the ends of the first connecting frame 31 and the second connecting frame 32 with the first roller 34 and the second roller 35 can be driven to move synchronously in the same direction, and during the movement, the lifting frame 2 is driven to rise and fall horizontally. By adjusting the height of the lifting frame 2 relative to the ladder frame body 1, the height of the staff on the standing platform 21 is adjusted, so that it is convenient for the staff to inspect and repair the parts above the landing wheels of the aircraft at different heights.

[0030] Furthermore, an extension step 22 is fixedly provided on the edge of the lifting frame 2 near the main step 11. The extension step 22 and the main step 11 are located on the same side of the ladder frame body 1. When the lifting frame 2 rises, the extension step 22 is continuous with the main step 11. When the lifting frame 2 is raised, the staff can also enter and exit the platform 21 through the extension step 22, thereby improving work efficiency. The start switch of the first piston cylinder 33 can be set on the ladder frame body 1, the lifting frame 2, or set as a wired / wireless remote control, so that the staff can operate it conveniently.

[0031] Furthermore, a protective plate 4 is provided on the ladder frame body 1. The protective plate 4 is located on the side of the first piston cylinder 33 close to the yield cavity 12. The protective plate 4 is used to prevent the wheel from touching the first piston cylinder 33 when the ladder frame body 1 is moved to the outside of the aircraft wheel, thereby protecting the first piston cylinder 33.

[0032] In the embodiment of the present application, a plurality of moving wheels 5 are fixedly installed at the bottom of the ladder frame body 1 by bolt connection, rivet connection or welding, and the moving wheels 5 can be universal wheels. A support assembly for supporting the ground is provided on the ladder frame body 1. When the ladder frame body 1 needs to be positioned on the ground and climbing is required, the ground is supported by the support assembly to limit the movement of the ladder frame body 1 on the ground.

[0033] Specifically, the supporting assembly includes a rotating plate 61, a supporting block 62 and a second piston cylinder 63. The rotating plates 61 are rotatably mounted at the bottom of both ends of the ladder frame body 1, the moving wheel 5 is fixedly mounted on the rotating plate 61, and the supporting block 62 is fixedly arranged on the rotating plate 61 on one side of the moving wheel 5. The cylinder body of the second piston cylinder 63 is hinged to the ladder frame body 1, and the piston rod is hinged to the rotating plate 61. The piston rod of the second piston cylinder 63 is extended and retracted to allow the supporting block 62 and the moving wheel 5 to be alternately supported on the ground. Furthermore, the support block 62 and the moving wheel 5 can be arranged in sequence away from the hinge axis of the rotating plate 61, and the movable end of the rotating plate 61 can be limited to flip upward without limit through the structure of the ladder frame body 1 itself. When the piston rod of the second piston cylinder 63 is retracted, the rotating plate 61 and the ladder frame body 1 restrict each other. At this time, the support block 62 is supported on the ground to limit the movement of the ladder frame body 1. When the piston rod of the second piston cylinder 63 is extended, the rotating plate 61 is driven to flip, and the moving wheel 5 replaces the support block 62 to support it on the ground, so that the ladder frame body 1 can move on the ground. When the ladder frame body 1 moves, no one is on the ladder frame body 1, thereby reducing the force load on the second piston cylinder 63.

[0034] Reference Figure 4 Furthermore, a guardrail 7 is detachably provided at the edge of the standing platform 21 of the lifting frame 2. Specifically, the guardrail 7 is composed of two sub-rail bodies, and the ends of the upper parts of the two sub-rail bodies facing each other can be plugged into each other. A connecting sleeve 72 for installing the guardrail 7 is welded and fixed on the edge of the lifting frame 2. The lower part of the sub-rail body is provided with a plug-in portion 71 adapted to the connecting sleeve 72. The connecting sleeve 72 is provided with a threaded hole penetrating therein. After the plug-in portion 71 of the sub-rail body is inserted into the connecting sleeve 72, a locking bolt 73 is threadedly connected through the threaded hole and pressed against the outer wall of the plug-in portion 71, thereby fixing the sub-rail body and the connecting sleeve 72. Furthermore, a limiting groove is provided on the plug-in portion 71. When the locking bolt 73 limits the plug-in portion 71, the locking bolt 73 abuts against the inner wall of the limiting groove, so that when the guardrail 7 is installed on the second connecting frame 32, the guardrail 7 is limited relative to the connecting sleeve 72, thereby improving the installation stability of the guardrail 7.

[0035] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A working ladder for aircraft maintenance, characterized in that: include: The ladder frame body has a clearance cavity formed at the lower part for giving way to the wheels of the aircraft; A main step, arranged on at least one side wall of the ladder frame body; A lifting frame is located above the ladder frame body and is provided with a standing platform; The ladder frame body is provided with a driving assembly for driving the lifting frame to rise and fall relative to the ladder frame body.

2. A working ladder for aircraft maintenance according to claim 1, characterized in that: The drive assembly comprises: A first connecting frame, one end of which is hinged to the ladder frame body and the other end of which is rotatably connected to a first roller, wherein the first roller is horizontally slidably connected to the lifting frame; A second connecting frame, one end of which is hinged to the lifting frame and the other end of which is rotatably connected to a second roller, wherein the second roller is horizontally slidably connected to the ladder frame body; The middle portion of the first connecting frame is hinged to the middle portion of the second connecting frame; The first piston cylinder has a cylinder body hinged to the ladder frame body, and a piston rod hinged to any connecting frame.

3. A working ladder for aircraft maintenance according to claim 2, characterized in that: A protective plate for protecting the piston cylinder is fixedly arranged on the ladder frame body, and the protective plate is located on a side of the piston cylinder close to the yield cavity.

4. A working ladder for aircraft maintenance according to claim 1, characterized in that: An extension step is fixedly arranged on the lifting frame, and the extension step and the main step are located on the same side of the ladder frame body. When the lifting frame is raised, the extension step is connected with the main step.

5. A working ladder for aircraft maintenance according to claim 4, characterized in that: A plurality of moving wheels are fixedly arranged at the bottom of the ladder frame body, and the moving wheels are universal wheels. A supporting assembly for supporting the ground is arranged on the ladder frame body.

6. A working ladder for aircraft maintenance according to claim 5, characterized in that: The support assembly includes a rotating plate, a support block and a second piston cylinder. The bottom of both ends of the ladder frame body are rotatably mounted with a rotating plate. The moving wheel is fixedly mounted on the rotating plate. The support block is fixedly arranged on the rotating plate on one side of the moving wheel. The cylinder body of the second piston cylinder is hinged to the ladder frame body, and the piston rod is hinged to the rotating plate. The piston rod of the second piston cylinder is extended and retracted so that the support block and the moving wheel are alternately supported on the ground.

7. A working ladder for aircraft maintenance according to claim 1, characterized in that: A protective fence is detachably provided on the edge of the standing platform of the lifting frame.

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