A380 large wing landing gear integrated disassembly and assembly tool

Abstract

The utility model discloses a kind of A380 big wing landing gear overall dismounting tools, including the damping strut maintaining tool for keeping the angle between big wing landing gear damping strut and big wing landing gear trolley frame, the damping strut maintaining tool is composed by front maintaining strut for supporting between big wing landing gear damping strut and big wing landing gear trolley frame and rear maintaining strut for supporting between rear brake connecting rod mounting hole and big wing landing gear trolley rear wheel axle.The utility model can be disassembled and assembled to A380 big wing landing gear, can reduce manpower demand, reduce the use of large equipment, can reduce manpower and equipment cost, and can reduce manual labor intensity, save time and effort, convenient to use, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft maintenance technology, and in particular relates to a tool for the overall disassembly and assembly of the A380 large wing landing gear. Background Technology

[0002] Currently, airlines and maintenance companies typically use the following methods to disassemble and assemble the A380's main wing landing gear: lifting the aircraft, removing the main wing landing gear wheels and brakes, using a landing gear disassembly and assembly vehicle to lift the landing gear trolley, removing the front pivot pin 31 and rear pivot pin 32, and then removing the landing gear to remove the main wing landing gear. Main wing landing gear installation requires keeping the aircraft lifted, using the landing gear disassembly and assembly vehicle to install the landing gear, removing the vehicle after installation, and finally reinstalling the previously removed wheels and brake-related components. The structure of the A380 main wing landing gear 35 is as follows: Figure 7 As shown, it includes a shock absorber strut outer cylinder 33, a shock absorber strut piston assembly 34 connected to the shock absorber strut outer cylinder 33, and a large wing landing gear trolley frame 2. The shock absorber strut outer cylinder 33 and the shock absorber strut piston assembly 34 constitute the large wing landing gear shock absorber strut 1.

[0003] During the entire disassembly and assembly process, the removal and assembly of wheel and brake components, and the use of the landing gear jack to lift the landing gear trolley, account for the majority of the work time. This requires A380 wing landing gear disassembly and assembly equipment or equivalent equipment, and the A380 wing landing gear storage vehicle is occupied continuously from disassembly to assembly. In other words, each disassembly and assembly operation of the A380 wing landing gear requires the disassembly and assembly of each component, including the wheels and brakes, necessitating the provision of corresponding disassembly, assembly, and storage equipment. If multiple aircraft require landing gear disassembly and assembly work simultaneously, it will cause equipment shortages, thus affecting normal work operations. Furthermore, this equipment is expensive, and its components are either bulky or delicate, making it unsuitable for business trips or parts relocation. Utility Model Content

[0004] The purpose of this utility model is to provide an A380 large wing landing gear assembly and disassembly tool that can reduce manpower and equipment costs, save time and effort, is easy to use, and improves work efficiency.

[0005] The purpose of this utility model is achieved through the following technical measures: A tool for the overall disassembly and assembly of A380 large wing landing gear, characterized in that it includes a shock absorber strut holding tool for maintaining the angle between the large wing landing gear shock absorber strut and the large wing landing gear carriage frame. The shock absorber strut holding tool consists of a front holding strut for supporting between the large wing landing gear shock absorber strut and the large wing landing gear carriage frame and a rear holding strut for supporting between the rear brake linkage mounting hole and the rear wheel axle of the large wing landing gear carriage.

[0006] This invention allows for the complete disassembly and assembly of the A380 large wing landing gear, reducing manpower requirements and the use of large equipment, thereby lowering labor and equipment costs. It also reduces the intensity of manual labor, saves time and effort, is easy to use, and improves work efficiency.

[0007] The A380 main wing landing gear assembly and disassembly tool of this utility model includes an adjustment seat for adjusting the position of the main wing landing gear in the X, Y, and Z directions.

[0008] The front retaining strut of this utility model consists of a lead screw, a pair of internally threaded sleeves, and a pair of connectors. One end of each sleeve is fitted onto both ends of the lead screw and can move along the lead screw, making the length of the front retaining strut adjustable. The lead screw is provided with a positioning element for locking the sleeve after the length is adjusted. The other ends of each sleeve are connected to the two connectors. The two connectors have mounting holes and connecting assemblies installed in the mounting holes for connecting the upper lug of the large wing landing gear trolley beam and for connecting the front lug of the shock absorber strut piston assembly, respectively.

[0009] The connecting assembly of this utility model consists of a mounting pin inserted into a mounting hole, a bushing fitted onto the end of the mounting pin, and a locking pin disposed on the bushing.

[0010] This invention provides an observation hole on the side wall of each sleeve of the front retaining strut for observing the remaining length of the lead screw.

[0011] The rear retaining strut of this utility model consists of a pair of telescopic rods for connecting to the mounting holes of the rear brake linkage, a pair of wheel axle clamp ends for clamping onto the rear wheel axle of the large wing landing gear frame, and a fixed strut. The two ends of the fixed strut are respectively connected to a wheel axle clamp end, and the wheel axle clamp end is connected to the telescopic rods.

[0012] The wheel axle clamp end of this utility model is formed by joining two semi-circular clamps with connecting parts. One semi-circular clamp is connected to a fixed support rod through the connecting part, and the other semi-circular clamp is connected to a telescopic rod through the connecting part. A protective ring is provided on the inner surface of the wheel axle clamp end. The protective ring is preferably made of Teflon material.

[0013] The adjusting seat of this utility model includes a three-dimensional frame bracket, a first slide rail plate fixed to the top surface of the bracket along the X direction, a first lead screw arranged along the X direction, a second slide rail plate arranged along the Y direction, a slider, a second lead screw arranged along the Y direction, and a third lead screw arranged along the Z direction. The first lead screw is rotatably mounted on the first slide rail plate and located above it. The first lead screw passes through the second slide rail plate and slides with it. The second slide rail plate is slidably mounted on the first slide rail plate. The slider is slidably mounted on the second slide rail plate. The second lead screw passes through the slider and slides with it. The lower end of the third lead screw is fixed to the bracket, and the upper end is connected to the bottom surface of the first slide rail plate. The height of the side rod of the bracket is adjustable.

[0014] The A380 large wing landing gear assembly and disassembly tool of this utility model includes pads for fine-tuning the landing gear relative to the ground by placing them under the four tires respectively. The pads are composed of a steel plate and a Teflon material layer on the upper surface of the steel plate, and lubricating oil is applied between the steel plate and the Teflon material layer.

[0015] Compared with the prior art, the present invention has the following significant advantages:

[0016] This invention allows for the complete disassembly and assembly of the A380's large wing landing gear. Compared to existing technologies, this invention eliminates the need for disassembly and assembly of wheel and brake components, the need to utilize the landing gear to disassemble and assemble the roof-mounted large wing landing gear trolley, and the need to occupy wheel and brake component storage equipment and A380 large wing landing gear disassembly and assembly equipment. Therefore, this invention reduces manpower requirements, the use of large equipment, and lowers labor and equipment costs. It also reduces manual labor intensity, saves time and effort, is easy to use, and improves work efficiency. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the front retaining strut of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the rear retaining strut of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the adjustment seat of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the pad of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the disassembly and assembly of the large wing landing gear using the disassembly and assembly tool of this utility model;

[0023] Figure 6 This is a top view of the overall disassembly and assembly of the large wing landing gear using the disassembly and assembly tool of this utility model;

[0024] Figure 7 This is a structural diagram of the large wing landing gear.

[0025] In the diagram: 1-Large wing landing gear shock absorber strut, 2-Large wing landing gear carriage frame, 3-Front retaining strut, 4-Rear brake linkage mounting hole, 5-Large wing landing gear carriage rear axle, 6-Rear retaining strut, 7-Adjusting seat, 8-Plate, 9-Lead screw, 10-Sleeve, 11-Connector, 12-Tightening nut, 13-Mounting pin, 14-Bushing, 15-Locking pin, 16-Inspection hole, 17-Telescopic rod, 18-Wheel axle clamp end, 19 - Fixed strut, 20 - Protective ring, 21 - First slide rail plate, 22 - First lead screw, 23 - Second slide rail plate, 24 - Slider, 25 - Second lead screw, 26 - Third lead screw, 27 - Side rod, 28 - Operating handwheel, 29 - Steel plate, 30 - Teflon material layer, 31 - Front pivot pin, 32 - Rear pivot pin, 33 - Shock absorber strut outer cylinder, 34 - Shock absorber strut piston assembly, 35 - Large wing landing gear, 36 - Push-pull handle, 37 - Wheel. Detailed Implementation

[0026] The present invention will be further described below through specific embodiments, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not depart from the basic idea of ​​the present invention, they are all within the protection scope of the present invention.

[0027] like Figures 1-7 As shown, this utility model discloses an A380 large wing landing gear assembly and disassembly tool, including a shock absorber holding tool for maintaining the angle between the large wing landing gear shock absorber strut 1 and the large wing landing gear carriage 2, an adjustment seat 7 for adjusting the position of the large wing landing gear in the X, Y, and Z directions, and pads 8 for fine-tuning the landing gear relative to the ground by placing them under the four tires respectively.

[0028] The shock absorber strut retaining device includes a front retaining strut 3 (i.e., the front retaining strut 3 is used to install at the pitch actuator position of the wing landing gear carriage) for supporting the shock absorber strut 1 and the wing landing gear carriage frame 2, and a rear retaining strut 6 for supporting the rear brake linkage mounting hole 4 and the rear wheel axle 5 of the wing landing gear carriage. The front retaining strut 3 and the rear retaining strut 6 work together to keep the wing landing gear shock absorber strut stable.

[0029] The front retaining strut 3 consists of a lead screw 9, a pair of internally threaded sleeves 10, and a pair of connectors 11. One end of each sleeve 10 is fitted onto both ends of the lead screw 9 and can move along the lead screw 9, making the length of the front retaining strut 3 adjustable. A positioning element is provided on the lead screw 9 for locking the sleeves 10 after length adjustment. In this embodiment, the positioning element is a tightening nut 12. The other ends of each sleeve 10 are connected to the two connectors 11. Each connector 11 has a mounting hole and connecting assemblies installed in the mounting hole for connecting the upper lug of the large wing landing gear carriage beam (pitch actuator mounting point) and for connecting the front lug of the shock absorber strut piston assembly (pitch actuator rod end mounting point). The connecting assembly consists of a mounting pin 13 inserted into the mounting hole, a bushing 14 fitted onto the end of the mounting pin 13, and a locking pin 15 provided on the bushing 14. An observation hole 16 is provided on the side wall of each sleeve 10 for observing the remaining length of the lead screw.

[0030] The rear retaining strut 6 consists of a pair of telescopic struts 17 for connecting to the rear brake linkage mounting holes 4, a pair of wheel axle clamp ends 18 for clamping onto the rear wheel axle 5 of the large wing landing gear frame, and a fixed strut 19. Both ends of the fixed strut 19 are connected to a wheel axle clamp end 18, and the wheel axle clamp end 18 is connected to the telescopic struts 17. The telescopic strut 17 consists of a brake linkage mounting end and a strut body. The brake linkage mounting end is installed in the rear brake linkage mounting hole and has a lead screw at its end, allowing for individual adjustment of the end's extension length. It connects to the strut body via a threaded connection. Both ends of the strut body have internal threads that engage with the lead screws of the brake linkage mounting end and the wheel axle clamp end, respectively. Rotating the strut body adjusts the overall length of the rear retaining strut. Each end of the strut body has an observation hole for determining the remaining length of the brake linkage mounting end and the wheel axle clamp end. The wheel axle clamp end 18 is formed by two semi-circular clamps with connecting parts connected by screws. One semi-circular clamp is connected to the fixed support rod 19 via the connecting part, and the other semi-circular clamp is connected to the telescopic rod 17 via the threaded connecting part. The extension length of the end can be adjusted independently. It connects to the rod body with the rod thread, and there is a Teflon protective ring 20 fixed by screws on the inner surface of the wheel axle clamp end 18. The inner diameter of the clamp is the same as the outer diameter of the rear wheel axle of the large wing landing gear carriage, ensuring that the clamp can be tightly wrapped around the rear wheel axle of the large wing landing gear carriage. The fixed support rod connects the left and right clamps to keep their positions consistent.

[0031] The adjustment seat 7, via three lead screws in three mutually perpendicular directions (X-axis, Y-axis, and Z-axis), allows for left-right, forward-backward, and vertical movement during use. The adjustment seat 7 includes a three-dimensional frame support, a first slide rail plate 21 fixed to the top surface of the support along the X-axis, a first lead screw 22 along the X-axis, a second slide rail plate 23 along the Y-axis, a slider 24, a second lead screw 25 along the Y-axis, and a third lead screw 26 along the Z-axis. The first lead screw 22 is rotatably mounted on and above the first slide rail plate 21. The first lead screw 22 passes through and slides with the second slide rail plate 23. The second slide rail plate 23 is slidably mounted on the first slide rail plate 21. The slider 24 is slidably mounted on the second slide rail plate 23. The second lead screw 25 passes through and slides with the slider 24. The lower end of the third lead screw 26 is fixed to the support, and the upper end is connected to the bottom surface of the first slide rail plate 21. The side rod 27 of the support is height-adjustable. Operating handwheels 28 are installed on the first lead screw 22, the second lead screw 25, and the third lead screw 26. Figure 3 (The operating handwheel on the first lead screw 22 is not shown in the drawing). A push-pull handle 36 is provided on one side of the three-dimensional frame bracket, and a wheel 37 is installed on the bottom surface of the other side.

[0032] The pad 8 consists of four steel plates 29 and four Teflon material layers 30 on the upper surface of the steel plate 29. It is used to place under the four tires when installing the landing gear. By applying lubricating oil between the upper and lower layers, the friction between the upper and lower pads is reduced, making it easier to make fine adjustments to the landing gear relative to the ground when pressing on the pad.

[0033] A disassembly and assembly method using the aforementioned A380 large wing landing gear assembly and disassembly tool, the disassembly is performed according to the following steps:

[0034] S1. Raise the aircraft to the set altitude;

[0035] S2. Install the shock absorber strut retaining tool on the wing landing gear carriage to maintain the angle of the wing landing gear shock absorber strut relative to the wing landing gear carriage, ensuring that the shock absorber strut does not pitch forward or backward after the wing landing gear is disengaged.

[0036] Install the clamp end of a set of rear retaining struts onto the rear axle of the large wing landing gear carriage, and install the other end onto the rear brake linkage mounting hole. During installation, the end or the body of the rear retaining strut can be rotated to adjust the appropriate installation length. After reaching the appropriate length, install the two halves of the clamps with screws to ensure that the clamps tightly wrap around the rear axle.

[0037] Install the front retaining strut to the mounting position of the landing gear trolley pitch actuator (the trolley pitch actuator has been removed). During installation, the lead screw can be rotated to adjust the appropriate installation length. After reaching the appropriate length, tighten the nut to ensure a secure installation.

[0038] The function of the front and rear retaining struts is to lock the angle of the main wing landing gear damping strut relative to the main wing landing gear trolley frame after the front and rear pivot pins are pulled out, so that the main wing landing gear damping strut does not pitch back and forth.

[0039] S3. Using the trolley frame of the large wing landing gear as the base, the A380 large wing landing gear shock absorber strut is used to compress the actuator cylinder to support the outer cylinder of the landing gear to relieve the shear force of the front and rear pivot pins, and then the front and rear pivot pins are pulled out.

[0040] S4. Remove the entire wing landing gear (with wheels, brakes, and other components in place), keep the shock absorber struts in place, and push the wing landing gear away from the wing area of ​​the aircraft.

[0041] Installation is performed according to the following steps:

[0042] S1. Push the wing landing gear equipped with shock absorber struts under the wing.

[0043] S2. Use wheel axle jacks to lift the front and rear axles of the large wing landing gear frame until the tires are off the ground. Place the pads under the tires, then lower the wheel axle jacks so that all four tires are on the pads. Remove the wheel axle jacks.

[0044] S3. Place adjustment seats under the front and rear axles of the large wing landing gear trolley frame respectively, and adjust them in the Z direction until the adjustment seats are in contact with the top of the shock absorber strut trolley.

[0045] S4. Use the A380 large wing landing gear shock absorber strut compression actuator to support the outer cylinder of the large wing landing gear, so that the front and rear pivot pin holes of the large wing landing gear shock absorber strut are close to the corresponding pin holes on the aircraft.

[0046] S5. By pushing the landing gear on the pad to move relative to the ground and making fine adjustments to the two adjustment seats in the X, Y, and Z directions, the pivot hole of the large wing landing gear shock absorber strut is made coaxial with the corresponding pin hole on the aircraft. The front and rear pivot pins are inserted and the large wing landing gear is installed on the aircraft.

[0047] S6. Remove the shock absorber support retaining tool and remove the adjustment seat;

[0048] S7. Use wheel axle jacks to lift the front and rear axles of the large wing landing gear frame until the tires are off the ground. Remove the pads, lower the wheel axle jacks so that all four tires are on the ground, and then remove the wheel axle jacks.

[0049] For a significant portion of landing gear disassembly and assembly work, it is actually unnecessary to remove landing gear wheels, brake assemblies, or other related components; the sole purpose is to remove the landing gear from the aircraft. For such work, using the integrated landing gear disassembly and assembly method of this invention can save considerable work on disassembling and assembling landing gear accessories (removing landing gear wheels and brake assemblies, using the landing gear disassembly and assembly vehicle to lift the wing landing gear trolley frame, and eliminating the need for the A380 wing landing gear disassembly and assembly vehicle and storage vehicle). Therefore, using this method can save substantial manpower and avoid redundant and expensive related equipment.

[0050] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tool for the overall disassembly and assembly of the A380 large wing landing gear, characterized in that: It includes a shock absorber strut retaining tool for maintaining the angle between the main wing landing gear shock absorber strut and the main wing landing gear carriage, the shock absorber strut retaining tool consisting of a front retaining strut for supporting between the main wing landing gear shock absorber strut and the main wing landing gear carriage and a rear retaining strut for supporting between the rear brake linkage mounting hole and the rear wheel axle of the main wing landing gear carriage.

2. The A380 large wing landing gear assembly and disassembly tool according to claim 1, characterized in that: The A380 main wing landing gear assembly and disassembly tool includes an adjustment seat for adjusting the position of the main wing landing gear in the X, Y, and Z directions.

3. The A380 large wing landing gear assembly and disassembly tool according to claim 2, characterized in that: The front retaining strut consists of a lead screw, a pair of internally threaded sleeves, and a pair of connectors. One end of each sleeve is fitted onto both ends of the lead screw and can move along the lead screw, making the length of the front retaining strut adjustable. The lead screw is provided with a positioning element for locking the sleeve after the length is adjusted. The other ends of each sleeve are connected to the two connectors. The two connectors have mounting holes and connecting assemblies installed in the mounting holes for connecting the upper lug of the large wing landing gear trolley beam and for connecting the front lug of the shock absorber strut piston assembly, respectively.

4. The A380 large wing landing gear assembly and disassembly tool according to claim 3, characterized in that: The connecting assembly consists of a mounting pin inserted into a mounting hole, a bushing fitted onto the end of the mounting pin, and a locking pin disposed on the bushing.

5. The A380 large wing landing gear assembly and disassembly tool according to claim 4, characterized in that: Each sleeve of the front retaining strut has an observation hole on its side wall for observing the remaining length of the lead screw.

6. The A380 large wing landing gear assembly and disassembly tool according to claim 5, characterized in that: The rear retaining strut consists of a pair of telescopic rods for connecting to the rear brake linkage mounting holes, a pair of wheel axle clamp ends for clamping onto the rear wheel axle of the large wing landing gear frame, and a fixed strut. The two ends of the fixed strut are respectively connected to a wheel axle clamp end, and the wheel axle clamp end is connected to the telescopic rods.

7. The A380 large wing landing gear assembly and disassembly tool according to claim 6, characterized in that: The wheel axle clamp end is formed by joining two semi-circular clamps with connecting parts. One semi-circular clamp is connected to a fixed support rod through the connecting part, and the other semi-circular clamp is connected to a telescopic rod through the connecting part. A protective ring is provided on the inner surface of the wheel axle clamp end.

8. The A380 large wing landing gear assembly and disassembly tool according to claim 7, characterized in that: The adjusting seat includes a three-dimensional frame bracket, a first slide rail plate fixed to the top surface of the bracket along the X direction, a first lead screw arranged along the X direction, a second slide rail plate arranged along the Y direction, a slider, a second lead screw arranged along the Y direction, and a third lead screw arranged vertically along the Z direction. The first lead screw is rotatably mounted on the first slide rail plate and located above it. The first lead screw passes through the second slide rail plate and slides with it. The second slide rail plate is slidably mounted on the first slide rail plate. The slider is slidably mounted on the second slide rail plate. The second lead screw passes through the slider and slides with it. The lower end of the third lead screw is fixed to the bracket, and the upper end is connected to the bottom surface of the first slide rail plate. The height of the side rod of the bracket is adjustable.

9. The A380 large wing landing gear assembly and disassembly tool according to claim 8, characterized in that: The A380 large wing landing gear assembly and disassembly tool includes pads for fine-tuning the landing gear relative to the ground by placing them under the four tires. The pads consist of a steel plate and a Teflon layer on the upper surface of the steel plate, with lubricant applied between the steel plate and the Teflon layer.

Images