Skid type undercarriage structure of aircraft

Abstract

The utility model discloses a skid type undercarriage structure of an aircraft, which comprises an undercarriage outer skin wrapped with a sandwich, an undercarriage supporting part and an undercarriage supporting butt joint part, the undercarriage supporting part and the undercarriage supporting butt joint part are composed of the undercarriage outer skin, the undercarriage supporting butt joint part is connected with the undercarriage supporting part in an inserted mode, and a mounting connector is connected to the undercarriage supporting butt joint part in a clamped mode. The skid type undercarriage structure of the aircraft is divided into an upper part and a lower part, the upper part is an undercarriage butt joint part, and the lower part is an undercarriage supporting part. The upper part and the lower part of the undercarriage are filled with composite material carbon fiber fabric and foam. Butt joints are connected through bolts and nuts. The undercarriage can support the weight of the aircraft on the ground, so that the aircraft can be safely parked on the ground and can bear various forces and vibrations generated in the take-off and landing processes. And the influence of airflow on the aircraft is absorbed and buffered in the flight process.

Description

Technical Field

[0001] The utility model relates to the technology of landing gear field, in particular to a skid-type landing gear structure of an aircraft. Background Art

[0002] As one of the key components of an aircraft, the landing gear of an aircraft must be lightweight, structurally sound, and strong enough to ensure safety and stability during ground operations and flight. Traditional landing gear designs usually use a telescopic structure, but in some scenarios, the telescopic landing gear has problems such as high complexity, difficulty in maintenance, and high weight. Utility Model Content

[0003] In view of this, the present invention aims at the deficiencies of the prior art, and its main purpose is to provide a skid-type landing gear structure for an aircraft to solve the problem of complex maintenance caused by the retractable landing gear, thereby overcoming the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a skid-type landing gear structure of an aircraft, including a landing gear outer skin wrapped with a sandwich, and a landing gear support part and a landing gear support docking part composed of the landing gear outer skin, the landing gear support docking part is plugged into the landing gear support part, and a mounting joint is clamped on the landing gear support docking part.

[0005] Furthermore, the landing gear support part is composed of two independent circular sandwich parts, and both ends of the circular sandwich parts are bent upward so that the landing gear support docking part is suspended in the air.

[0006] Furthermore, an extension portion with a reduced diameter is integrally formed at the upwardly bent end of the landing gear support portion, and the upper end of the extension portion is plugged into the inner cavity of the lower end of the landing gear support docking portion and contacts the inner cavity core of the landing gear support docking portion.

[0007] Furthermore, a through hole penetrates through the contact portion between the landing gear support portion and the ground.

[0008] Furthermore, an extension rod is inserted through the through hole, and one of the two ends of the extension rod is located at the upper part or the lower part of the landing gear support part.

[0009] Furthermore, an extrusion sheet is provided on the extension rod, and the extrusion sheet is located in the landing gear support portion and in contact with the filling core.

[0010] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the skid-type landing gear structure of the aircraft is divided into two parts, the upper part is the landing gear docking part, and the lower part is the landing gear supporting part. The upper and lower parts of the landing gear are both made of composite material carbon fiber fabric and foam filling. The docking point is connected by bolts and nuts. The landing gear can support the weight of the aircraft on the ground so that the aircraft can be safely parked on the ground, and can withstand various forces and vibrations generated during takeoff and landing. Absorb and buffer the impact of airflow on the aircraft during flight.

[0011] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a landing gear of an embodiment of the utility model.

[0013] Figure 2 It is an embodiment of the utility model Figure 1 Enlarged view of point A.

[0014] Figure 3 It is a cross-sectional view of a landing gear support portion of an embodiment of the present utility model.

[0015] Figure 4 It is a further cross-sectional view of the landing gear support portion of the embodiment of the present utility model.

[0016] Description of the accompanying drawings:

[0017] Landing gear outer skin 1; landing gear support part 3; extension part 31; landing gear support docking part 4; mounting joint 5; mounting opening 51; through hole 6; extension rod 61; extrusion sheet 62; sandwich core 7. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, a skid-type landing gear structure of an aircraft includes a landing gear outer skin 1 wrapped with a sandwich core 7, and a landing gear support portion 3 and a landing gear support docking portion 4 composed of the landing gear outer skin 1. The landing gear support docking portion 4 is plugged into the landing gear support portion 3, and a mounting joint 5 is clamped on the landing gear support docking portion 4. The plugging of the landing gear support portion 3 and the landing gear support docking portion 4 allows it to be adapted for installation on aircraft of different models.

[0019] Exemplarily, the landing gear support portion 3 is divided into two independent circular sandwich parts, and the two ends of the circular sandwich parts are bent upward so that the landing gear support docking portion 4 is suspended in the air. Because the two ends of the two slats that constitute the landing gear support portion 3 are bent upward, the landing gear support docking portion 4 inserted on the two slats has sufficient length to adapt to different types of aircraft. The curved shape of the slats can provide a certain elasticity, so that the landing gear support portion can absorb and disperse the impact force when the aircraft lands or takes off, reducing damage to the aircraft structure. This can extend the service life of the landing gear and aircraft structure and improve flight safety. By suspending the landing gear support docking portion in the air, the weight can be reduced, which is very important for aircraft because lighter weight can improve fuel efficiency, increase flight distance and load capacity.

[0020] For example, Figure 2 The upward curved end of the landing gear support part 3 is integrally formed with an extension part 31 with a reduced diameter. The upper end of the extension part 31 is plugged into the inner cavity of the lower end of the landing gear support docking part 4 and contacts the inner cavity sandwich 7 of the landing gear support docking part 4. Due to the plugging of the extension part 31 with the inner cavity of the landing gear support docking part 4 and the contact of the extension part 31 with the inner cavity sandwich 7 of the landing gear support docking part 4, the sandwich 7 is foam and has a certain buffering capacity, which can reduce the impact force during the landing of the aircraft. It can absorb and disperse the impact force and protect the aircraft structure from damage. By reducing the force during the landing process, this design can reduce the structural stress of the aircraft and reduce the risk of damage to aircraft components. This can extend the service life of the landing gear and improve the safety of the aircraft. Using foam as a filling material can greatly reduce the weight of the landing gear compared to traditional metal materials. Reducing the weight of the aircraft can improve fuel efficiency, increase flight distance and load capacity.

[0021] For example, Figure 3 and Figure 4 The contact part between the landing gear support part 3 and the ground is penetrated by a through hole 6, and an extension rod 61 is inserted through the through hole 6. One of the two ends of the extension rod 61 is located at the upper part or the lower part of the landing gear support part 3. The extension rod 61 is also provided with an extrusion sheet 62, which is located in the landing gear support part 3 and contacts the sandwich 7. When the landing gear support part 3 contacts the ground, the extension rod 61 will touch the ground in advance, and the extrusion sheet 62 on the extension rod 61 will squeeze the sandwich 7 in the landing gear support part 3, further reducing the force applied to the aircraft during landing, thereby reducing impact and vibration. The use of the extension rod can provide additional support points and increase the stability of the landing gear support part and the ground. This helps to reduce the shaking and swaying of the landing gear during landing, improve the stability of the aircraft, and reduce the risk of loss of control.

[0022] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A skid-type landing gear structure for an aircraft, characterized in that: The invention comprises a landing gear outer skin (1) wrapped with a sandwich core (7), and a landing gear support part (3) and a landing gear support docking part (4) formed by the landing gear outer skin (1), wherein the landing gear support docking part (4) is plugged into the landing gear support part (3), and a mounting joint (5) is clamped on the landing gear support docking part (4).

2. The skid-type landing gear structure of an aircraft according to claim 1, characterized in that: The landing gear support part (3) is divided into two independent circular sandwich parts, and the two ends of the slats are bent upward so that the landing gear support docking part (4) is suspended in the air.

3. The skid-type landing gear structure of an aircraft according to claim 2, characterized in that: The upwardly curved end of the landing gear support portion (3) is integrally formed with an extension portion (31) with a reduced diameter, and the upper end of the extension portion (31) is plugged into the inner cavity of the lower end of the landing gear support docking portion (4), and is connected to the inner cavity core (7) of the landing gear support docking portion (4).

4. The skid-type landing gear structure of an aircraft according to claim 1, characterized in that: A through hole (6) penetrates the contact portion between the landing gear support portion (3) and the ground.

5. The skid-type landing gear structure of an aircraft according to claim 4, characterized in that: An extension rod (61) is inserted through the through hole (6), and one of the two ends of the extension rod (61) is located at the upper part or the lower part of the landing gear support part (3).

6. The skid-type landing gear structure of an aircraft according to claim 5, characterized in that: The extension rod (61) is also provided with an extrusion sheet (62), which is located inside the landing gear support portion (3) and in contact with the sandwich core (7).

Images