Undercarriage supporting tool for repairing damaged airplane

Abstract

The utility model discloses an undercarriage supporting tool for repairing a damaged airplane, which belongs to the technical field of airplane overhaul, comprises a front undercarriage supporting tool and a main undercarriage supporting tool, and is used for fixing and keeping the airplane at a horizontal position in the repairing process of the damaged airplane. The lower end of the stand column is fixed to the ground platform through the flange plate, the upper end of the stand column is fixedly connected with the frame body connecting fork, and the frame body connecting fork is arranged in the shape of the airplane connecting position and is connected with an airplane nose landing gear and a main landing gear mounting point; and the diagonal draw bar is connected and fastened on a connecting point of an original actuating cylinder of the undercarriage. According to the utility model, the airplane can be kept in a horizontal parking state in the repairing process, and the position deviation caused by the influence of external force can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft maintenance technology, and in particular relates to a landing gear support tool for repairing damaged aircraft. Background Technology

[0002] During aircraft repair, the aircraft must be kept in a level parking position. During the disassembly and replacement of aircraft cockpit components, the installation positions of each replacement component must be clamped and fixed to prevent displacement due to external forces. Existing tooling, equipment, and technology cannot guarantee a relatively stable state for the ground, supporting tooling, and the aircraft. Therefore, it is necessary to design a supporting tooling to prevent installation misalignment and automatic displacement, ensuring the quality of aircraft overhauls and flight safety. Utility Model Content

[0003] To address the aforementioned problems in the background art, this utility model provides a landing gear support fixture for repairing damaged aircraft.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A landing gear support fixture for repairing damaged aircraft is a component of a damaged aircraft repair fixture. The base of the damaged aircraft repair fixture is a ground platform 1, on which three jacks 2 are installed. The jacks 2 are used to adjust the aircraft to a level position. The landing gear support fixture includes a nose landing gear support fixture 3 and a main landing gear support fixture 4. After the aircraft is leveled, the nose landing gear support fixture 3 replaces the jacks 2 at the nose landing gear and is fixed to the nose landing gear mounting point of the aircraft frame 16 to support the fuselage frame 16. There are two main landing gear support fixtures 4, which replace the two jacks 2 at the main landing gear and are fixed to the main landing gear mounting point of the aircraft to support the fuselage.

[0006] The aforementioned nose landing gear support fixture 3 includes a frame connecting fork 5, a column 6, reinforcing ribs 7, a flange 8, and a tie rod 9. The flange 8 is located at the bottom and is used for fixed connection with the ground platform 1. The column 6 is fixed at the center of the upper surface of the flange 8, and its height is set according to the actual support height after the aircraft is leveled. Four reinforcing ribs 7 are fixedly installed at the lower part of the column 6, and support feet are installed at the bottom of the reinforcing ribs 7 to adjust the gap during the installation of the fixture. The tie rod 9 is installed on the column 6, one end of which is connected to the column 6 through a half-clamp structure, and the other end is connected to the column 6 through an end threaded pin and nut, referring to the installation form of the aircraft landing gear actuator. The connection is fastened to the original actuator cylinder connection point of the landing gear to ensure that the front landing gear support fixture 3 does not shift around the landing gear connection point as the axis; the frame connecting fork 5 is fixed to the top of the column 6, and is set as an inverted triangular support structure with a horizontal top according to the shape of the 16 frame. Referring to the connection method of the front landing gear, the top of the frame connecting fork 5 is provided with a groove that matches the structure of the aircraft's front landing gear mounting point. Pin sleeves are provided on both sides of the groove, and adjusting bolts (left and right threaded) are installed in the pin sleeves and fastened to the front landing gear mounting point on the aircraft's 16 frame. The adjusting bolts are manufactured according to the original assembly bolt size of the aircraft to ensure that the gap is the same as the original state.

[0007] The two main landing gear support fixtures 4 have the same structure, including a frame connecting fork 5, a column 6, a reinforcing rib 7, a flange 8, and a tie rod 9. The column 6, flange 8, and tie rod 9 are the same as those of the nose landing gear support fixture 3. The reinforcing rib 7 connects the column 6 and the flange 8. The frame connecting fork 5 is fixed to the top of the column 6 and is set as a triangular structure according to the main landing gear connection method. The mounting surface is a slope. The mounting surfaces of the frame connecting forks 5 on the two main landing gear support fixtures 4 are opposite each other. Grooves are made at the mounting surfaces to match the structure of the aircraft main landing gear mounting point. Pin sleeves are provided on both sides of the grooves. Adjusting bolts (left-hand and right-hand threads) are installed in the pin sleeves and fastened to the aircraft main landing gear mounting point. The adjusting bolts are manufactured according to the original assembly bolt size of the aircraft to ensure that the clearance is the same as the original state.

[0008] The beneficial effects of this utility model are: This utility model enables the aircraft to be kept in a horizontal parking state during the repair process and will not be affected by external forces to cause positional displacement. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall tooling for repairing damaged aircraft.

[0010] Figure 2 This is a structural diagram of the front landing gear support fixture.

[0011] Figure 3 This is a structural diagram of the main landing gear support fixture.

[0012] In the diagram: 1-Ground platform; 2-Jack; 3-Front landing gear support fixture; 4-Main landing gear support fixture; 5-Frame connecting fork; 6-Column; 7-Reinforcing rib; 8-Flange; 9-Tie rod. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0014] A landing gear support fixture for repairing damaged aircraft is a component of damaged aircraft repair fixtures, as described above. Figure 1 As shown, the bottom is a ground platform 1, and three jacks 2 are installed on the ground platform 1. The jacks 2 are used to adjust the aircraft to a level position. The landing gear support fixtures include a nose landing gear support fixture 3 and a main landing gear support fixture 4. After the aircraft is leveled, the nose landing gear support fixture 3 replaces the jacks 2 at the nose landing gear and is fixed to the nose landing gear mounting point of the aircraft frame 16 to support the fuselage frame 16. There are two main landing gear support fixtures 4, which replace the two jacks 2 at the main landing gear and are fixed to the main landing gear mounting point of the aircraft to support the fuselage.

[0015] The aforementioned nose landing gear support fixture 3 is used to replace the jack 21 at the nose landing gear after the aircraft is leveled, serving to support the fuselage frame 16; it includes a frame connecting fork 5, a column 6, a reinforcing rib 7, a flange 8, and a tie rod 9, which are welded together as follows: Figure 2As shown; flange 8 is located at the bottom, made of Q235A steel plate with a thickness of δ20mm, and has 8 φ28mm mounting holes, which are fixedly connected to the ground platform 1; column 6 is fixed at the center of the upper surface of flange 8, made of Q235A / (G152×12)mm cold-drawn steel pipe, and its height is set according to the actual support height after the aircraft is leveled. A reinforcing rib 7 is fixedly installed at the lower part of column 6, made of No. 6 Q235A channel steel. Support feet are installed at the bottom of reinforcing rib 7 to adjust the gap during the installation of the fixed tooling. A diagonal tie rod 9 is installed on column 6. One end is connected to column 6 through a half-clamp structure, and the other end is connected and fastened to the original landing gear actuator cylinder by end threaded pins and nuts, referring to the installation form of the aircraft landing gear actuator cylinder. At the connection point, to ensure that the nose landing gear support fixture 3 does not shift around the landing gear connection point as the axis; the frame connecting fork 5 is welded and fixed to the top of the column 6, and is set as an inverted triangular support structure with a horizontal top according to the shape of the 16 frame, and is welded from Q235A / δ30mm steel plate. Referring to the nose landing gear connection method, the top of the frame connecting fork 5 is provided with a groove that matches the structure of the aircraft nose landing gear mounting point. Pin sleeves are provided on both sides of the groove. The pin sleeves are made of (G65×10)mm steel pipe to ensure that their rigidity meets the usage requirements. Adjusting bolts (left and right threaded) are installed in the pin sleeves and fastened to the nose landing gear mounting point on the aircraft 16 frame. The adjusting bolts are manufactured according to the original assembly bolt size of the aircraft to ensure that the gap is the same as the original state.

[0016] After the frame connecting fork 5 of the nose landing gear support fixture 3 is connected to the corresponding installation part of the aircraft, the space position of the aircraft is adjusted using jack 2. After the aircraft is leveled, the height of the column 6 is determined according to the actual height position of the frame connecting fork 5, and then the remaining parts are welded and assembled. After the four reinforcing ribs 7 support the feet and the installation gap is adjusted, the flange 8 is fixed to the ground platform 1. The installation hole position of the flange 8 and the ground platform 1 is drilled on-site according to the actual installation position, and then secured with bolts.

[0017] The main landing gear support fixture 4 has two symmetrically arranged components. After the aircraft is leveled, these components replace the two jacks 2 at the main landing gear location to support the fuselage. The top is fixed to the main landing gear mounting point. The main landing gear support fixture 4 also includes a frame connecting fork 5, a column 6, a reinforcing rib 7, a flange 8, and a tie rod 9. After assembly and welding, as shown... Figure 3As shown, the column 6, flange 8, and tie rod 9 are the same as those in the nose landing gear support fixture 3. The reinforcing rib 7 is connected between the column 6 and the flange 8. The frame connecting fork 5 is fixed to the top of the column 6. It is set as a triangular structure with reference to the main landing gear connection method. It is welded from Q235A / δ30mm steel plate and the mounting surface is inclined. The mounting surfaces of the frame connecting forks 5 on the two main landing gear support fixtures 4 are opposite each other. The mounting surfaces are all grooved to match the structure of the main landing gear mounting point. Pin sleeves are provided on both sides of the grooves. The pin sleeves are also the same as those in the nose landing gear support fixture 3.

[0018] After the frame connecting fork 5 of the main landing gear support fixture 4 is connected to the corresponding installation part of the aircraft, the space position of the aircraft is adjusted using jack 2. After the aircraft is leveled, the height of the column 6 is determined according to the actual height position of the frame connecting fork 5, and then the remaining parts are welded and assembled. The mounting hole position of the flange 8 connected to the ground platform 1 is drilled on-site according to the actual installation position, and then secured with bolts.

[0019] The installation and usage process is as follows:

[0020] After the ground platform 1 is leveled, the aircraft body and jacks 2 are placed on the ground platform 1. The frame connecting forks 5 of the nose landing gear support fixture 3 and the main landing gear support fixture 4 are connected to the corresponding installation parts of the aircraft. Jacks 2 are used to level the aircraft. After the aircraft is leveled, the height of the columns 6 of the nose landing gear support fixture 3 and the main landing gear support fixture 4 is determined according to the actual height position of each frame connecting fork 5, and the remaining parts are welded and assembled. The nose landing gear support fixture 3 uses the reinforcing ribs 7 connected to its columns 6 to support the feet and adjust the installation gap. The nose landing gear support fixture 3 and the main landing gear support fixture 4 are drilled on the flange 8 according to the actual installation position, and then connected and secured to the ground platform 1 with bolts. The verticality of the columns 6 after the fixture is installed is calibrated by laser.

[0021] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A landing gear support fixture for repairing damaged aircraft, belonging to the category of damaged aircraft repair fixtures, wherein the bottom of the damaged aircraft repair fixture is a ground platform (1), and three jacks (2) are installed on the ground platform (1) for adjusting the aircraft to a level position, characterized in that, The landing gear support fixtures include a nose landing gear support fixture (3) and a main landing gear support fixture (4). After the aircraft is leveled, the nose landing gear support fixture (3) replaces the jacks (2) at the nose landing gear and is fixed to the nose landing gear mounting point of the aircraft frame 16 to support the fuselage frame 16. There are two main landing gear support fixtures (4), which replace the two jacks (2) at the main landing gear and are fixed to the main landing gear mounting point of the aircraft to support the fuselage.

2. The landing gear support fixture for repairing damaged aircraft according to claim 1, characterized in that, The aforementioned front landing gear support fixture (3) includes a frame connecting fork (5), a column (6), a reinforcing rib (7), and a flange (8). The flange (8) is located at the bottom and is used to fix it to the ground platform (1). The column (6) is fixed at the center of the upper surface of the flange (8), and its height is set according to the actual support height after the aircraft is leveled. Four reinforcing ribs (7) are fixedly installed at the bottom of the column (6), and the bottom of the reinforcing ribs (7) is equipped with support feet to adjust the gap when the fixture is installed. The frame connecting fork (5) is fixed at the top of the column (6) and is set as an inverted triangular support structure with a horizontal top according to the shape of the 16-frame, and is fastened to the front landing gear mounting point on the 16-frame of the aircraft.

3. A landing gear support fixture for repairing damaged aircraft according to claim 2, characterized in that, The column (6) is also equipped with a diagonal tie rod (9), one end of which is connected to the column (6) through a half-clamp structure, and the other end is connected and fastened to the original actuator connection point of the landing gear in accordance with the installation form of the aircraft landing gear actuator.

4. A landing gear support fixture for repairing damaged aircraft according to claim 2, characterized in that, The top of the frame connecting fork (5) is provided with a groove that matches the structure of the aircraft's front landing gear mounting point. Pin sleeves are provided on both sides of the groove, and adjusting bolts are installed inside the pin sleeves to fasten to the front landing gear mounting point on the aircraft frame 16.

5. A landing gear support fixture for repairing damaged aircraft according to claim 4, characterized in that, The adjusting bolts are manufactured according to the original assembly bolt dimensions of the aircraft to ensure that the clearance is the same as that of the original aircraft.

6. A landing gear support fixture for repairing damaged aircraft according to claim 1, characterized in that, The two main landing gear support fixtures (4) have the same structure, including a frame connecting fork (5), a column (6), a reinforcing rib (7), and a flange (8). The flange (8) is located at the bottom and is used to fix it to the ground platform (1). The column (6) is fixed at the center of the upper surface of the flange (8), and its height is set according to the actual support height after the aircraft is leveled. The reinforcing rib (7) is connected between the column (6) and the flange (8). The frame connecting fork (5) is fixed at the top of the column (6) and is set as a triangular structure with a sloped mounting surface, referring to the main landing gear connection method. The mounting surfaces of the frame connecting forks (5) on the two main landing gear support fixtures (4) are opposite to each other and are fastened to the main landing gear mounting points of the aircraft.

7. A landing gear support fixture for repairing damaged aircraft according to claim 6, characterized in that, The mounting surface of the frame connecting fork (5) is provided with grooves that match the structure of the aircraft main landing gear mounting point. Pin sleeves are provided on both sides of the grooves, and adjusting bolts are installed inside the pin sleeves to fasten them to the aircraft main landing gear mounting point.

8. A landing gear support fixture for repairing damaged aircraft according to claim 7, characterized in that, The adjusting bolts are manufactured according to the original assembly bolt dimensions of the aircraft to ensure that the clearance is the same as that of the original aircraft.

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