Radar cover maintenance ladder

Abstract

The utility model aims to provide the radome maintenance ladder which has the advantages of compact structure, large activity space and hidden inclined ladder. The lifting device comprises a movable elevated frame, a plurality of steering wheels are arranged at the bottom of the movable elevated frame, a first inclined ladder is arranged on the side of the movable elevated frame, a lifting oil cylinder and a linear guide rail which is obliquely arranged are arranged on an overhead layer of the movable elevated frame, and a lifting table is arranged at the action end of the lifting oil cylinder. A second inclined ladder is arranged on the side of the lifting table, the top of the second inclined ladder is hinged to the lifting table, and the bottom of the second inclined ladder is matched with the linear guide rail in a guiding mode. The working ladder is applied to the technical field of working ladders.

Description

Technical Field

[0001] The utility model is applied to the technical field of working ladders, and particularly relates to a radome maintenance ladder. Background Art

[0002] The aircraft radome is used to protect the radar system inside the radome from external force damage or destruction. In addition, the radome not only serves as a component of the aircraft's external shape, but also can maintain the overall aerodynamic shape of the aircraft to ensure the safe flight of the aircraft. Since the aircraft radome is at a certain height from the ground, manual maintenance requires a working ladder for auxiliary maintenance. Due to the certain length and weight of the working ladder, it takes a lot of effort to carry it manually. If carried back and forth for a long time, it will increase the labor intensity of workers and is not conducive to improving the assembly efficiency.

[0003] In the prior art, the lifting platform of the working ladder mostly uses a hydraulic rod for lifting. A straight ladder or a fixed inclined ladder is arranged on the side of the lifting platform for maintenance personnel to climb onto the lifting platform. The straight ladder adopts a vertical structure, and the top of the straight ladder is connected to the side of the lifting platform. The straight ladder has the disadvantage of low stability. When the working ladder is used for a long time and exposed to the sun, rain and wind, the connection part is prone to looseness, posing a safety hazard. In addition, the crawling type consumes more energy for the human body; the fixed inclined ladder occupies a large area, further increasing the floor area of the working ladder and being not conducive to the movement of the working ladder.

[0004] Therefore, it is necessary to provide a radome maintenance ladder with the advantages of compact structure, large activity space and a hidden inclined ladder. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a radome maintenance ladder with the advantages of compact structure, large activity space and a hidden inclined ladder.

[0006] The technical solution adopted by the utility model is as follows: The utility model includes a movable elevated rack, and a plurality of steering wheels are arranged at the bottom of the movable elevated rack. A first inclined ladder is arranged on the side of the movable elevated rack. A lifting oil cylinder and an inclined linear guide rail are arranged in the overhead layer of the movable elevated rack. The action end of the lifting oil cylinder is provided with a lifting platform. A second inclined ladder is arranged on the side of the lifting platform. The top of the second inclined ladder is hinged to the lifting platform, and the bottom of the second inclined ladder is in guiding cooperation with the linear guide rail.

[0007] As can be seen from the above solution, the first inclined ladder is fixed, the second inclined ladder is movable, the lifting oil cylinder drives the lifting frame to lift, meeting the requirements of different working surface heights. The lifting of the lifting frame drives the second inclined ladder to move. When the lifting frame descends, the second inclined ladder is hidden in the overhead layer of the movable elevated rack, thereby improving the compactness of the maintenance ladder. The plane of the movable elevated rack serves as the placement surface for materials, and the lifting platform serves as the standing surface for maintenance personnel, maximizing the working surface of the maintenance personnel and facilitating the maintenance personnel to inspect the radome. This not only improves the flexibility and practicality of the maintenance ladder, but also reduces the use cost, making the maintenance ladder more suitable for various working environments and operation requirements. The maintenance personnel can approach multiple parts such as the landing gear, wheel bay, and radome of the aircraft. Through simple operations, the user can adjust the height and platform width of the working ladder according to specific working needs, which not only improves work efficiency, but also reduces the need for frequent adjustment or replacement of the maintenance ladder, thus saving time and cost.

[0008] One preferred solution is that the lifting platform is provided with an oil tank and a hand-operated hydraulic pump, and the oil tank is connected to the oil port of the lifting oil cylinder through an oil pipe via the hand-operated hydraulic pump.

[0009] One preferred solution is that the second inclined ladder includes several layers of footrests. The left and right ends of the footrests are hinged with connecting rods. The top of the connecting rod is hinged with the lifting platform, and the bottom of the connecting rod is provided with pulleys. The linear guide rail is a groove structure, and the pulleys are in guiding cooperation with the groove structure.

[0010] One preferred solution is that the platform surface of the movable elevated rack is a T-shaped structure, and the number of groups of the lifting platforms is two. The two groups of lifting platforms are respectively arranged on the left and right sides of the T-shaped structure.

[0011] One preferred solution is that handrails and guardrails are provided on the first inclined ladder, the movable elevated rack, and the lifting platform.

[0012] One preferred solution is that lifting feet are provided on the side of the movable elevated rack, and the bottom of the lifting feet is matched with the ground.

[0013] One preferred solution is that a towing bar is provided on the side of the movable elevated rack, and the towing bar serves as a connecting component between the maintenance ladder and an external trailer.

[0014] One preferred solution is that several guide columns are provided at the bottom of the lifting platform, and guide blocks are provided on the movable elevated rack. The guide columns are in sliding cooperation with the guide blocks. Description of the Drawings

[0015] Figure 1 is the three-dimensional structure diagram of the present utility model;

[0016] Figure 2 It is a three-dimensional structure diagram of another angle of the present utility model;

[0017] Figure 3 It is a three-dimensional structure diagram of the connecting rod and the linear guide rail. Specific embodiments

[0018] As Figure 1 and Figure 2 shown, in this embodiment, the present utility model includes a movable elevated rack 1. A plurality of steering wheels 2 are provided at the bottom of the movable elevated rack 1. A first inclined ladder 3 is provided on the side of the movable elevated rack 1. A lifting oil cylinder 4 and an inclined linear guide rail 5 are provided on the overhead layer of the movable elevated rack 1. A lifting platform 6 is provided at the action end of the lifting oil cylinder 4. A second inclined ladder 7 is provided on the side of the lifting platform 6. The top of the second inclined ladder 7 is hinged to the lifting platform 6, and the bottom of the second inclined ladder 7 is in guiding cooperation with the linear guide rail 5.

[0019] The external trailer or manual pushing moves the movable elevated rack 1 to the working surface. The steering wheels 2 play a guiding role in the movement of the movable elevated rack 1. According to the height of the working surface, the lifting oil cylinder 4 drives the lifting platform 6 to lift. When the lifting oil cylinder 4 drives the lifting platform 6 to rise, the second inclined ladder 7 is outside the movable elevated rack 1, and maintenance personnel climb onto the lifting platform 6 through the second inclined ladder 7. When the lifting oil cylinder 4 drives the lifting platform 6 to descend, the second inclined ladder 7 is located on the overhead layer of the movable elevated rack 1 to achieve a hidden type. The linear guide rail 5 provides guiding support for the movement of the second inclined ladder 7. The first inclined ladder 3 is used for maintenance personnel to climb onto the plane of the movable elevated rack 1.

[0020] As Figure 1 and Figure 2 shown, in this embodiment, a fuel tank 8 and a hand-operated hydraulic pump 9 are provided on the lifting platform 6. The fuel tank 8 is communicated with the oil port of the lifting oil cylinder 4 through an oil pipe via the hand-operated hydraulic pump 9. By shaking the hand-operated hydraulic pump 9 and with the cooperation of the fuel tank 8, the lifting oil cylinder 4 drives the lifting platform 6 to lift to meet the requirements of different working surface heights. In addition, the hand-operated hydraulic pump 9 is provided on the lifting platform 6, which is convenient for maintenance personnel to adjust the height of the lifting platform 6 in real time.

[0021] As Figure 3As shown, in this embodiment, the second inclined ladder 7 includes a plurality of layers of footrests 10. The left and right ends of the footrests 10 are hinged with connecting rods 11. The top of the connecting rods 11 is hinged with the lifting platform 6, and the bottom of the connecting rods 11 is provided with pulleys 12. The linear guide rail 5 is a groove structure, and the pulleys 12 are in guiding cooperation with the groove structure. When the lifting platform 6 ascends and descends, the footrests 10 are hinged with the connecting rods 11 to realize the unfolding or contraction of the second inclined ladder 7. Both the pulleys 12 and the groove structure provide guidance and support for the movement of the second inclined ladder 7.

[0022] As Figure 1 and Figure 2 shown, in this embodiment, the platform surface of the movable elevated rack 1 is a T-shaped structure, and the number of groups of the lifting platforms 6 is two. The two groups of lifting platforms 6 are respectively arranged on the left and right sides of the T-shaped structure. Adopting the T-shaped structure is beneficial to improving the compactness of the maintenance ladder and ensuring that the working surface of the maintenance personnel is maximized.

[0023] As Figure 1 and Figure 2 shown, in this embodiment, handrail guards 13 are provided on the first inclined ladder 3, the movable elevated rack 1, and the lifting platform 6. The handrail guards 13 are used to ensure the working safety of the maintenance personnel and prevent falling.

[0024] As Figure 1 and Figure 2 shown, in this embodiment, lifting feet 14 are provided on the side of the movable elevated rack 1, and the bottom of the lifting feet 14 is in contact with the ground. Shake the lifting feet 14, and the bottom of the lifting feet 14 is in close contact with the ground, so that the steering wheels 2 leave the ground and prevent the maintenance ladder from sliding.

[0025] As Figure 1 and Figure 2 shown, in this embodiment, a towing bar 15 is provided on the side of the movable elevated rack 1. The towing bar 15 serves as a connecting component between the inspection ladder and an external trailer. The external trailer is connected to the towing bar 15, and the external trailer drives the maintenance ladder to move through the towing bar 15.

[0026] As Figure 1 and Figure 2 shown, in this embodiment, a plurality of guide posts 16 are provided at the bottom of the lifting platform 6, and guide blocks 17 are provided on the movable elevated rack 1. The guide posts 16 are in sliding cooperation with the guide blocks 17, thus playing a role in guiding and supporting.

Claims

1. A radome maintenance ladder, comprising a movable elevated platform (1), characterized in that: A plurality of steering wheels (2) are arranged at the bottom of the movable elevated frame (1); a first inclined ladder (3) is arranged on the side of the movable elevated frame (1); a lifting cylinder (4) and an inclined linear guide rail (5) are arranged on the overhead layer of the movable elevated frame (1); a lifting platform (6) is arranged at the action end of the lifting cylinder (4); a second inclined ladder (7) is arranged on the side of the lifting platform (6); the top of the second inclined ladder (7) is hinged to the lifting platform (6); and the bottom of the second inclined ladder (7) is guided and matched with the linear guide rail (5).

2. A radome maintenance ladder according to claim 1, characterized in that: The lifting platform (6) is provided with an oil tank (8) and a hand-operated hydraulic pump (9); the oil tank (8) is connected to the oil port of the lifting cylinder (4) via an oil pipe through the hand-operated hydraulic pump (9).

3. The radome maintenance ladder according to claim 1, characterized in that: The second inclined ladder (7) comprises a plurality of steps of footrests (10), the left and right ends of the footrests (10) are hinged with connecting rods (11), the top of the connecting rod (11) is hinged with the lifting platform (6), the bottom of the connecting rod (11) is provided with a pulley (12), the linear guide rail (5) is a groove structure, and the pulley (12) is guided and matched with the groove structure.

4. The radome maintenance ladder according to claim 1, characterized in that: The platform surface of the movable elevated structure (1) is a T-shaped structure, and the number of groups of the lifting platforms (6) is two. The two groups of lifting platforms (6) are respectively arranged on the left and right sides of the T-shaped structure.

5. The radome maintenance ladder according to claim 1, characterized in that: The first inclined ladder (3), the movable elevated frame (1), and the lifting platform (6) are all provided with handrail guardrails (13).

6. The radome maintenance ladder according to claim 1, characterized in that: A lifting foot (14) is provided on the side of the movable elevated frame (1), and the bottom of the lifting foot (14) is engaged with the ground.

7. The radome maintenance ladder according to claim 1, characterized in that: A towing rod (15) is provided on the side of the movable elevated frame (1), and the towing rod (15) serves as a connecting component between the maintenance ladder and an external trailer.

8. The radome maintenance ladder according to claim 1, characterized in that: A plurality of guide columns (16) are provided at the bottom of the lifting platform (6), and a guide block (17) is provided on the movable elevated frame (1), wherein the guide columns (16) are slidably matched with the guide blocks (17).

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