Handheld aircraft nail dismounting device

Abstract

The utility model discloses a handheld aircraft screw dismounting device which comprises a blanking cap, a screw dismounting table, an aluminum oil cylinder, an adjusting foot margin, a tool box and an adapter, the adjusting foot margin is placed on an aircraft skin, the upper end of the adjusting foot margin is connected to the lower surface of the screw dismounting table, the rear end of the screw dismounting table is of a C-shaped structure and clamps the front end face and the rear end face of a conical screw to be dismounted, and the blanking cap is installed at the front end of the screw dismounting table. The aluminum oil cylinder is installed in the nail dismounting table, the front end of the aluminum oil cylinder is attached to the blanking cap, the rear end of the aluminum oil cylinder is pressed on the inner surface of a boss of the cylindrical shell, a piston rod of the aluminum oil cylinder penetrates through the middle of the boss and is connected with the adapter, the tool box is connected with the aluminum oil cylinder through an oil pipe and connected with the adapter through a cable, and the inner surface of the rear end of the nail dismounting device abuts against the turned-over edge of the conical lining. The aluminum oil cylinder piston rod at the front end makes contact with the front end of the to-be-disassembled conical screw, a hand pump handle in the tool box is pressed, the aluminum oil cylinder piston rod stretches out till the to-be-disassembled conical screw is pushed out of the conical lining, and a display screen in the tool box displays the pushing force value in real time.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft manufacturing, and in particular to a handheld aircraft nail removing device. Background Art

[0002] The vertical stabilizer of the aircraft uses a tapered bolt plus a tapered bushing (tapered bolt group) in an interference fit to connect the vertical tail of the aircraft to the fuselage. If the friction force generated by the bolt group after installation cannot completely contain the lateral force range of the bolt group when loaded, the tapered bolt group and its matching tapered bushing will slide and rotate. Therefore, it is necessary to carry out a push-out force test of the vertical tail docking bolt group, analyze the relationship between the friction force generated by the bolt group after installation and the lateral force of the bolt group when loaded, push out the rotating tapered bolt, observe and analyze the wear of the tapered bolt and its bushing, and solve the problem that the tapered bolt of the vertical stabilizer rotates together with its matching tapered bushing.

[0003] The traditional process of disassembling and assembling pins usually relies on instantaneous impulse, which can easily cause damage and loosening to the pins and their adjacent parts, and there are dangerous factors, which can easily damage the aircraft products or cause the pins to fall into the aircraft, causing safety hazards. Since the disassembly force of the conical bolt group at the vertical tail of the aircraft is about 5 tons, it is impossible to disassemble it simply by knocking and impacting. Summary of the invention

[0004] The purpose of this application is to provide a handheld aircraft nail removal device. The device adopts a scale hook-shaped main body shape, and the hydraulic cylinder and the nail removal platform are made into an integral structure, which can achieve high thrust in a small and irregular space; it can accurately position the disassembled parts, all disassembly steps are reversible, and there is no damage to parts during the entire disassembly process.

[0005] In order to achieve the above purpose, the present application adopts the following technical solutions to achieve the purpose: a handheld aircraft nail removal device, including a plugging cover, a nail removal platform, an aluminum oil cylinder, an adjustment foot, a tool box, and an adapter. The adjustment foot is placed on the aircraft skin, and its upper end is connected to the lower surface of the nail removal platform through a thread. The front end of the nail removal platform is a hollow cylindrical shell, and the rear end of the shell is provided with a boss and a through hole. The rear end is a C-shaped structure, and the C-shaped mouth clamps the front and rear end surfaces of the conical screws to be removed of the aircraft product. The plugging cover is installed at the front end of the cylindrical shell of the nail removal platform through a threaded connection, and the aluminum oil cylinder is installed inside the cylindrical shell of the nail removal platform. Its front end fits with the plugging cover, and the rear end is pressed against the inner surface of the boss of the cylindrical shell. Its piston rod passes through the through hole in the middle of the boss and is connected to the adapter. The tool box is placed on the side close to the nail removal table and is connected to the aluminum cylinder through an oil pipe and to the adapter through a cable. The rear end inner surface of the nail removal device presses against the flange of the conical bushing, and the front end aluminum cylinder piston rod contacts the front end of the conical screw to be removed. The hand pump handle in the tool box is pressed, and the aluminum cylinder piston rod extends until the conical screw to be removed is pushed out of the conical bushing. The display screen in the tool box displays the pushing force value in real time.

[0006] The nail removal platform is a hollow cylindrical shell with an external thread on the upper end and avoidance grooves for aluminum cylinder oil pipes and handles on both sides. A boss and a through hole are provided at the lower end of the shell. The boss is used to resist the rear end face of the aluminum cylinder, and the through hole is used for the piston rod at the rear end of the aluminum cylinder to pass through. The lower part is a C-shaped structure. The C-shaped mouth can be inserted into the front and rear end faces of the tapered screws to be removed of aircraft products. A stepped through hole is provided on the inner surface of the lower end of the C-shaped structure, and the through hole can be used for the tapered screws to be removed to pass through. The step is used to press down the flanging of the tapered bushing. Weight-reducing grooves are provided on the front and rear surfaces. A boss structure with an internal thread is provided at the center of gravity of the entire nail removal platform for installing and adjusting the foot.

[0007] The plugging cover is provided with a hand-held handle at the upper end of the outer surface, a convex platform for pressing the front end surface of the aluminum oil cylinder is provided in the middle of the inner surface, and an internal thread is provided on the inner side surface to cooperate with the external thread of the nail removing platform.

[0008] The adjustment foot is a screw universal foot with a ball joint and has adjustment knobs on both sides.

[0009] A hand pump and an operation display screen can be placed inside the tool box, and oil pipes, cables and hand cranks can be stored. The front end of the box is provided with an avoidance groove for the range of movement of the crank, and a joint for the oil pipe is left on the side of the box close to the nail removal table.

[0010] The adapter consists of two finger clamps, a top plate and a sensor. The finger clamps are block-shaped with a semicircular notch in the middle. The two finger clamps are held together by bolts to clamp the piston rod and the sensor of the aluminum cylinder in turn. An avoidance hole for the sensor connector is left on one side of the finger clamp, and the rear end is connected to the top plate by threads. The strength of the top plate is weaker than the conical screw to be removed.

[0011] Beneficial effects: This application provides a handheld aircraft nail removal device that can measure the removal force, solves the problem of being unable to remove by knocking and impact, and fills the gap in domestic research on the removal of conical bolt groups. The device is easy to install and operate, and can be operated by one person; it adopts a scale hook-shaped main body shape, and the hydraulic cylinder and the nail removal table are made into an integral structure, which can achieve high thrust in a small and irregular space; it can accurately position the disassembled parts, and all disassembly steps are reversible, and there is no damage to parts during the entire disassembly process.

[0012] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Handheld aircraft nail removal device usage diagram

[0014] Figure 2 Nail removal table structure diagram

[0015] Figure 3 Adjust the footing structure

[0016] Figure 4 Adapter structure

[0017] Explanation of numbers in the figure: 1 plug cover; 2 nail removal table; 3 aluminum cylinder; 4 adjustment foot; 5 tool box; 6 adapter; 6-1 top cover; 6-2 finger clamp; 6-3 sensor; 7 aircraft skin; 8 conical screws to be removed. DETAILED DESCRIPTION

[0018] See also Figure 1-4 A handheld aircraft nail removal device comprises a plugging cover 1, a nail removal platform 2, an aluminum oil cylinder 3, an adjustment foot 4, a tool box 5, and an adapter 6. The adjustment foot 4 is placed on the aircraft skin 7, and its upper end is connected to the lower surface of the nail removal platform 2 through a thread. The front end of the nail removal platform 2 is a hollow cylindrical shell, and the rear end of the shell is provided with a boss and a through hole. The rear end is a C-shaped structure, and the C-shaped mouth clamps the front and rear end surfaces of the conical screw 8 to be removed of the aircraft product. The plugging cover 1 is installed at the front end of the cylindrical shell of the nail removal platform 2 through a threaded connection, and the aluminum oil cylinder 3 is installed inside the cylindrical shell of the nail removal platform 2. Its front end is in contact with the plugging cover 1, and the rear end is in contact with the plugging cover 1. The end is pressed tightly against the inner surface of the boss of the cylindrical shell, and its piston rod passes through the through hole in the middle of the boss and is connected to the adapter 6. The tool box 5 is placed on the side close to the nail removal table 2, and is connected to the aluminum cylinder 3 through an oil pipe, and is connected to the adapter 6 through a cable. The rear end inner surface of the nail removal device presses the flange of the conical bushing, and the piston rod of the aluminum cylinder 3 at the front end contacts the front end of the conical screw 8 to be removed. The hand pump handle in the tool box 5 is pressed, and the piston rod of the aluminum cylinder 3 slowly extends until the conical screw 8 to be removed is pushed out of the conical bushing. The display screen in the tool box 5 displays the pushing force value in real time.

[0019] See also Figure 2 The nail removal platform 2 is a hollow cylindrical shell with an external thread on the upper end and avoidance grooves for aluminum cylinder oil pipes and handles on both sides. A boss and a through hole are provided at the lower end of the shell. The boss is used to resist the rear end surface of the aluminum cylinder, and the through hole is used for the piston rod at the rear end of the aluminum cylinder to pass through. The lower part is a C-shaped structure. The C-shaped mouth can be inserted into the front and rear end surfaces of the tapered screw 8 to be removed of the aircraft product. A stepped through hole is provided on the inner surface of the lower end of the C-shaped structure, and the through hole can be used for the tapered screw 8 to be removed to pass through. The step is used to press the flanging of the tapered bushing to prevent the tapered bushing from being brought out when the tapered screw 8 to be removed is pushed out. Weight-reducing grooves are provided on the front and rear surfaces, and a boss structure with an internal thread is provided at the center of gravity of the entire nail removal platform for installing and adjusting the foot 4.

[0020] See also Figure 1 The upper end of the plug cover 1 has a hand-held handle, the middle of the inner surface is provided with a boss that contacts the front end surface of the aluminum oil cylinder 3, and the inner side surface is provided with an internal thread that cooperates with the external thread of the nail removal platform 2.

[0021] See also Figure 3 The adjustment foot 4 is a universal foot with a ball joint at the lower end of the screw, and has adjustment knobs on both sides for quick leveling of the position.

[0022] See also Figure 1 The tool box 5 can be used to place a hand pump and an operation display screen, and can store oil pipes, cables and hand cranks. The front end of the box is provided with an avoidance groove for the range of movement of the rocker, and a joint for connecting the oil pipe used to connect the aluminum oil cylinder 3 is left on one side of the box near the nail removal table 2.

[0023] See also Figure 4 The adapter 6 includes two finger clamps 6-2, a top plate 6-1 and a sensor 6-3. The finger clamp 6-2 is a block structure with a semicircular notch in the middle. The two finger clamps are held together by bolts to clamp the piston rod of the aluminum cylinder 3 and the sensor 6-3 in turn. A avoidance hole for the sensor 6-3 connector is left on one side of the finger clamp 6-2, and the rear end is connected to the top plate 6-1 by threads. The strength of the top plate 6-1 is weaker than the 8 tapered bolts to be disassembled, ensuring that the 8 tapered bolts to be disassembled are not damaged during the disassembly process.

Claims

1. A handheld aircraft nail removal device, characterized in that It includes a plugging cover, a nail removal platform, an aluminum oil cylinder, an adjustment foot, a tool box, and an adapter. The adjustment foot is placed on the aircraft skin, and its upper end is connected to the lower surface of the nail removal platform through a thread. The front end of the nail removal platform is a hollow cylindrical shell, and the rear end of the shell is provided with a boss and a through hole. The rear end is a C-shaped structure, and the C-shaped mouth clamps the front and rear end surfaces of the conical screws to be removed of the aircraft product. The plugging cover is installed at the front end of the cylindrical shell of the nail removal platform through a threaded connection, and the aluminum oil cylinder is installed inside the cylindrical shell of the nail removal platform. Its front end is fitted with the plugging cover, and the rear end is pressed tightly against the cylindrical shell. The inner surface of the boss, its piston rod passes through the through hole in the middle of the boss and is connected to the adapter. The tool box is placed on the side close to the nail removal table and is connected to the aluminum cylinder through an oil pipe and the adapter through a cable. The rear end inner surface of the nail removal device presses the flange of the conical bushing, and the front end aluminum cylinder piston rod contacts the front end of the conical screw to be removed. The hand pump handle in the tool box is pressed, and the aluminum cylinder piston rod extends until the conical screw to be removed is pushed out of the conical bushing. The display screen in the tool box displays the pushing force value in real time.

2. A handheld aircraft nail removal device according to claim 1, characterized in that The nail removal platform is a hollow cylindrical shell with an external thread on the upper end and avoidance grooves for aluminum cylinder oil pipes and handles on both sides. A boss and a through hole are provided at the lower end of the shell. The boss is used to resist the rear end face of the aluminum cylinder, and the through hole is used for the piston rod at the rear end of the aluminum cylinder to pass through. The lower part is a C-shaped structure. The C-shaped mouth can be inserted into the front and rear end faces of the tapered screws to be removed of the aircraft product. A stepped through hole is provided on the inner surface of the lower end of the C-shaped structure, and the through hole can be used for the tapered screws to be removed to pass through. The step is used to press down the flanging of the tapered bushing. Weight-reducing grooves are provided on the front and rear surfaces. A boss structure with an internal thread is provided at the center of gravity of the entire nail removal platform for installing and adjusting the foot.

3. A handheld aircraft nail removal device according to claim 1, characterized in that The plug cover has a hand-held handle on the upper end of the outer surface, a boss is provided in the middle of the inner surface to press the front end surface of the aluminum oil cylinder, and an internal thread is provided on the inner side surface to cooperate with the external thread of the nail removal platform.

4. A handheld aircraft nail removal device according to claim 1, characterized in that The adjusting foot is a screw universal foot with a ball joint and has adjusting knobs on both sides.

5. The handheld aircraft nail removal device according to claim 1, characterized in that A hand pump and an operation display screen are placed inside the tool box to store oil pipes, cables and hand cranks. An avoidance groove for the range of rocker movement is provided at the front end of the box, and a joint for the oil pipe is left on one side of the box close to the nail removal table.

6. The handheld aircraft nail removal device according to claim 1, characterized in that The adapter comprises two finger clamps, a top plate and a sensor. The finger clamps are block-shaped with a semicircular notch in the middle. The two finger clamps are held together by bolts to clamp the piston rod and the sensor of the aluminum cylinder in turn. An avoidance hole for the sensor connector is left on one side of the finger clamp, and the rear end is connected to the top plate by threads. The strength of the top plate is weaker than the conical bolts to be removed.

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