Wheel cabin lifting working ladder
By designing a wheel compartment lifting working ladder that uses hand-crank hydraulic device to drive the lifting cylinder, the existing working ladder has solved the problem of small working surface, inflexible and insufficient safety, achieving a larger working surface and higher flexibility, and reducing the cost of use.
Patent Information
- Application Number
- CN202422376629.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing maintenance work ladder has a small working area and is not flexible enough, the chassis covers a large area and lacks safety protection, and the driving method has the risk of heat generation and electric sparks.
A wheel compartment lifting working ladder is designed, which adopts a base frame, guide wheel, platform frame, lifting cylinder, hydraulic oil tank and hand-crank hydraulic device. The lifting cylinder is driven by a hand-crank hydraulic device to realize the lifting of the lifting rack, adjust the platform height and width, and increase the working surface.
It improves the safety and flexibility of the working ladder, expands the working surface, facilitates maintenance personnel to maintain, reduces the cost of use, and reduces the need for frequent adjustments or replacement of the working ladder.
Smart Images
Figure CN223047200U_ABST
Abstract
Description
Technical Field
[0001] The utility model is applied to the technical field of working ladders, and particularly relates to a wheel well lifting working ladder. Background Art
[0002] The aircraft wheel well refers to the main landing gear wheel well of the aircraft, which is an important part of the aircraft landing system. Since the aircraft wheel well has a certain height, manual maintenance requires a working ladder for auxiliary maintenance. However, the working surface of the existing maintenance working ladder is small. When maintenance personnel perform maintenance on the wheel well, they need to frequently move the maintenance working ladder to adjust the position of the working surface, thus reducing the efficiency of the maintenance work. At the same time, in order to maintain the stability of the maintenance working ladder, its chassis has a large footprint and is prone to interference with the landing gear of the aircraft. In addition, its safety protection measures are insufficient. Especially in the case of high-altitude operation, there is a certain gap between the maintenance ladder and the aircraft, increasing the risk of human stepping empty. In addition, the lifting of the existing aircraft working ladder is usually driven by an electric drive hydraulic system, and the motor boosts the hydraulic pump to provide the lifting power of the working ladder. This driving method has the following disadvantages: the high-power motor is prone to generate heat and is likely to generate electric sparks, posing a risk of electric leakage. Therefore, it is necessary to provide a wheel well lifting working ladder, which has the advantages of safety and reliability, a relatively large working surface, being able to adjust the height and platform width of the working ladder according to specific working requirements, and being beneficial to improving the maintenance efficiency. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a wheel well lifting working ladder, which has the advantages of safety and reliability, a relatively large working surface, being able to adjust the height and platform width of the working ladder according to specific working requirements, and being beneficial to improving the maintenance efficiency.
[0004] The technical solution adopted by the utility model is as follows: The utility model includes a chassis, and a plurality of guide wheels are arranged at the bottom of the chassis. The chassis is provided with a platform frame, a lifting oil cylinder, a hydraulic oil tank, and a manual hydraulic device. The hydraulic oil tank is communicated with the oil port of the lifting oil cylinder through the manual hydraulic device. An inclined ladder is arranged on one side of the platform frame, and a lifting frame is arranged on the other side of the platform frame. The bottom of the lifting frame is connected to the action end of the lifting oil cylinder. The lifting frame is in guiding cooperation with the platform frame. A straight ladder is arranged on the edge side of the lifting frame. The lifting frame, the straight ladder, the platform frame, and the inclined ladder are arranged in sequence along the horizontal direction.
[0005] As can be seen from the above solution, the lifting oil cylinder drives the lifting frame to lift, meeting the requirements of different working surface heights. The height of the platform frame remains fixed, and the lifting frame adjusts the plane height in real time according to the height of the working surface. The platform frame serves as the placement surface for materials, and the lifting frame serves as the standing surface for maintenance personnel, maximizing the working surface of the maintenance personnel and facilitating the maintenance personnel to inspect the circuits and equipment in the wheel well. This not only improves the flexibility and practicality of the work ladder but also reduces the usage cost, making the work ladder more suitable for various working environments and operation requirements. The maintenance personnel can access multiple parts such as the landing gear, wheel well, and aircraft flaps of the aircraft. Through simple operations, the user can adjust the height and platform width of the work ladder according to specific work needs, which not only improves work efficiency but also reduces the need for frequent adjustment or replacement of the work ladder, thus saving time and cost.
[0006] A preferred solution is that the upper surface of the platform frame is the first platform of the work ladder, and the upper surface of the lifting frame is the second platform of the work ladder.
[0007] A preferred solution is that several groups of pull-out plates are arranged side by side at the bottom of the lifting frame. The pull-out plates are arranged on the opposite side of the straight ladder, and the pull-out plates are slidably matched with the bottom of the lifting frame. The pull-out plates serve as an extension of the second platform.
[0008] A preferred solution is that handrails are provided on both the left and right sides of the lifting frame, the straight ladder, the platform frame, and the inclined ladder.
[0009] A preferred solution is that the guide wheels include a front wheel group and a rear wheel group. The front wheel group is located below the lifting frame, the rear wheel group is located below the platform frame, and lifting feet are provided on the adjacent side of the front wheel group.
[0010] A preferred solution is that the wheel well lifting work ladder further includes a towing rod. One end of the towing rod is connected to the bottom of the inclined ladder, and a connecting ring is provided at the other end of the towing rod.
[0011] A preferred solution is that linear guide rails are provided at both the left and right ends of the platform frame, and guide columns are provided at both the left and right ends of the bottom of the lifting frame. Grooves are provided on both the front and back sides of the linear guide rails, and pulleys are provided at both the left and right ends of the guide columns. The pulleys are in guiding cooperation with the grooves.
[0012] A preferred solution is that the bottom frame is a trapezoidal structure. The short side of the trapezoidal structure serves as the front part of the work ladder, and the long side of the trapezoidal structure serves as the rear part of the work ladder.
[0013] A preferred solution is that the platform frame is provided with through holes, and the straight ladder is arranged in the through holes. Description of the Drawings
[0014] Figure 1 is the three-dimensional structure diagram of the present utility model;
[0015] Figure 2 is the three-dimensional structure diagram of another angle of the present utility model;
[0016] Figure 3 is the exploded three-dimensional structure diagram of the linear guide rail and the guide post. Specific embodiments
[0017] As Figure 1 and Figure 2 shown, in this embodiment, the present utility model includes a chassis 1, several guide wheels 2 are arranged at the bottom of the chassis 1, the chassis 1 is provided with a platform frame 3, a lifting oil cylinder 4, a hydraulic oil tank 5, and a manual hydraulic device 6. The hydraulic oil tank 5 is communicated with the oil port of the lifting oil cylinder 4 through the manual hydraulic device 6. A diagonal ladder 7 is arranged on one side of the platform frame 3, and a lifting frame 8 is arranged on the other side of the platform frame 3. The bottom of the lifting frame 8 is connected to the action end of the lifting oil cylinder 4. The lifting frame 8 is in guiding cooperation with the platform frame 3. A straight ladder 9 is arranged on the edge side of the lifting frame 8. The lifting frame 8, the straight ladder 9, the platform frame 3, and the diagonal ladder 7 are arranged in sequence along the horizontal direction.
[0018] The external trailer or manual force is used to move the chassis 1 to the working surface. The guide wheels 2 play a guiding role in the movement of the chassis 1. According to the height of the working surface, the manual hydraulic device 6 is shaken. Through the cooperation of the hydraulic oil tank 5, the lifting oil cylinder 4 drives the lifting frame 8 to lift and lower, meeting the requirements of different working surface heights. The height of the platform frame 3 remains fixed, and the lifting frame 8 adjusts the plane height in real time according to the height of the working surface. The platform frame 3 serves as the placement surface for materials, and the lifting frame 8 serves as the standing surface for maintenance personnel, maximizing the working surface of the maintenance personnel.
[0019] As Figure 1 and Figure 2 shown, in this embodiment, the upper surface of the platform frame 3 is the first platform of the working ladder, and the upper surface of the lifting frame 8 is the second platform of the working ladder. The first platform serves as the placement surface for materials, and the second platform serves as the standing surface for maintenance personnel, maximizing the working surface of the maintenance personnel.
[0020] As Figure 1 and Figure 2As shown, in this embodiment, several groups of pull-out plates 10 arranged side by side are provided at the bottom of the lifting frame 8. The pull-out plates 10 are arranged on the opposite side of the straight climbing ladder 9. The pull-out plates 10 are slidably matched with the bottom of the lifting frame 8, and the pull-out plates 10 serve as an extended surface of the second platform. Since there is a certain distance between the lifting frame 8 and the maintenance position, maintenance personnel cannot perform maintenance. The pull-out plates 10 are pulled at the bottom of the lifting frame 8, and safety pins are locked, thereby increasing the working area of the maintenance personnel.
[0021] As Figure 1 and Figure 2 As shown, in this embodiment, handrails 11 are provided on both the left and right sides of the lifting frame 8, the straight climbing ladder 9, the platform frame 3, and the inclined climbing ladder 7. The handrails 11 are used to facilitate the climbing of maintenance personnel and ensure the operation safety of maintenance personnel to avoid falling.
[0022] As Figure 1 and Figure 2 As shown, in this embodiment, the guide wheel 2 includes a front wheel group and a rear wheel group. The front wheel group is located below the lifting frame 8, and the rear wheel group is located below the platform frame 3. Lifting feet 12 are provided on the adjacent side of the front wheel group. The size of the rear wheel group is larger than that of the front wheel group. When the chassis 1 moves to the working surface, the lifting feet 12 are shaken to rise and fall, so that the front wheel group leaves the ground, and the bottom of the lifting feet 12 cooperates with the ground to prevent the working ladder from sliding.
[0023] As Figure 1 and Figure 2 As shown, in this embodiment, the wheel cabin lifting working ladder further includes a towing rod 13. One end of the towing rod 13 is connected to the bottom of the inclined climbing ladder 7, and a connecting ring 18 is provided at the other end of the towing rod 13. An external trailer is connected to the connecting ring 18, and the external trailer drives the working ladder to move through the towing rod 13.
[0024] As Figure 3 As shown, in this embodiment, linear guide rails 14 are provided at both the left and right ends of the platform frame 3, guide columns 15 are provided at both the left and right ends of the bottom of the lifting frame 8, grooves 16 are provided on both the front and back sides of the linear guide rails 14, pulleys 17 are provided at both the left and right ends of the guide columns 15, and the pulleys 17 are in guiding cooperation with the grooves 16.
[0025] As Figure 1 and Figure 2 As shown, in this embodiment, the chassis 1 is of a trapezoidal structure. The short side of the trapezoidal structure serves as the front part of the working ladder, and the long side of the trapezoidal structure serves as the rear part of the working ladder. Adopting a trapezoidal structure is beneficial to reducing the floor area of the working ladder and reducing the risk of collision.
[0026] As Figure 1 and Figure 2 shown, in this embodiment, in this embodiment, the platform frame 3 is provided with through holes, and the straight ladder 9 is arranged in the through holes, thereby improving the compactness of the working ladder.
Claims
1. A wheel bay lifting work ladder, comprising a base frame (1), characterized in that: A plurality of guide wheels (2) are arranged at the bottom of the base frame (1). The base frame (1) is provided with a platform frame (3), a lifting cylinder (4), a hydraulic oil tank (5), and a hand-cranked hydraulic device (6). The hydraulic oil tank (5) is connected to the oil port of the lifting cylinder (4) via the hand-cranked hydraulic device (6). An inclined ladder (7) is arranged on one side of the platform frame (3). A lifting frame (8) is arranged on the other side of the platform frame (3). The bottom of the lifting frame (8) is connected to the action end of the lifting cylinder (4). The lifting frame (8) is guided and matched with the platform frame (3). A straight ladder (9) is arranged on the edge side of the lifting frame (8). The lifting frame (8), the straight ladder (9), the platform frame (3), and the inclined ladder (7) are arranged in sequence along the horizontal direction.
2. A wheel bay lifting ladder according to claim 1, characterized in that: The upper surface of the platform frame (3) is the first platform of the working ladder, and the upper surface of the lifting frame (8) is the second platform of the working ladder.
3. A wheel bay lifting ladder according to claim 2, characterized in that: The bottom of the lifting frame (8) is provided with a plurality of groups of drawer plates (10) arranged side by side. The drawer plates (10) are arranged on opposite sides of the straight ladder (9). The drawer plates (10) are slidably matched with the bottom of the lifting frame (8). The drawer plates (10) serve as an extension surface of the second platform.
4. A wheel bay lifting ladder according to claim 1, characterized in that: Handrails (11) are provided on the left and right sides of the lifting frame (8), the straight ladder (9), the platform frame (3), and the inclined ladder (7).
5. The wheel bay lifting ladder according to claim 1, characterized in that: The guide wheel (2) comprises a front wheel group and a rear wheel group, the front wheel group is located below the lifting frame (8), the rear wheel group is located below the platform frame (3), and a lifting foot (12) is provided on the adjacent side of the front wheel group.
6. The wheel bay lifting ladder according to claim 1, characterized in that: The wheel bay lifting work ladder further comprises a towing rod (13), one end of the towing rod (13) is connected to the bottom of the inclined ladder (7), and the other end of the towing rod (13) is provided with a connecting ring (18).
7. The wheel bay lifting ladder according to claim 1, characterized in that: The left and right ends of the platform frame (3) are both provided with linear guide rails (14), the left and right ends of the bottom of the lifting frame (8) are both provided with guide columns (15), the front and back sides of the linear guide rails (14) are both provided with grooves (16), the left and right ends of the guide columns (15) are both provided with pulleys (17), and the pulleys (17) are in guiding cooperation with the grooves (16).
8. The wheel bay lifting ladder according to claim 1, characterized in that: The base frame (1) is a trapezoidal structure, the short side of the trapezoidal structure serves as the front part of the working ladder, and the long side of the trapezoidal structure serves as the rear part of the working ladder.
9. The wheel bay lifting ladder according to claim 1, characterized in that: The platform frame (3) is provided with a through hole, and the straight ladder (9) is arranged in the through hole.