A skid-type landing gear structure

Abstract

This application belongs to the field of aircraft landing gear technology, and specifically relates to a novel skid-type landing gear structure, comprising: skid tubes, including two arranged at different tilt angles; a front crossbeam connected to the front end of the two skid tubes; a rear crossbeam connected to the rear end of the two skid tubes; and a fuselage joint installed on the front and rear crossbeams for connecting the front and rear crossbeams to the fuselage; wherein both the front and rear crossbeams are curved upwards to form an arc-shaped bow. This application reduces the load on the landing gear and aircraft; reduces the weight of the skid-type landing gear and aircraft; improves the cushioning performance of the skid-type landing gear; and reduces the manufacturing cost of the aircraft.

Description

Technical Field

[0001] This application belongs to the field of aircraft landing gear technology, and specifically relates to a skid-type landing gear structure. Background Technology

[0002] The most important function of landing gear is to reduce the landing load of the entire aircraft through its cushioning performance. For skid-type landing gear, its cushioning performance is achieved through the elastic deformation of the skid structure. However, the elastic deformation of this type of skid-type landing gear is limited, so its cushioning performance is relatively poor.

[0003] With the development of modern aircraft, the requirements for weight are becoming more stringent, which in turn places higher demands on the cushioning performance of landing gear. As a result, the traditional skid landing gear structure is increasingly unable to meet the performance requirements of aircraft. Therefore, in many cases, it is necessary to design the landing gear as a wheeled landing gear with oil and gas dampers. However, this type of landing gear structure is complex and the cost will increase significantly. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a skid-type landing gear structure, comprising:

[0005] The sliding tube consists of two tubes arranged at different angles of inclination.

[0006] The front crossbeam connects to the front ends of the two slide tubes;

[0007] The rear crossbeam connects to the rear ends of the two sliding tubes;

[0008] The fuselage connector is installed on the front and rear crossbeams to connect the front and rear crossbeams to the fuselage.

[0009] Both the front and rear crossbeams curve upwards, forming an arc-shaped bow.

[0010] Preferably, the front end of the slide tube is curved upwards to facilitate sliding on the ground.

[0011] Preferably, the slide tube is connected to the front crossbeam and the rear crossbeam via a joint, the joint including a sleeve and a mounting plate located at one end of the sleeve, the mounting plate being fixedly connected to the surface of the slide tube, and the sleeve being fixedly sleeved to both ends of the front crossbeam and the rear crossbeam.

[0012] Preferably, the planes containing the front and rear crossbeams are inclined forward relative to the plane containing the slide tube.

[0013] Preferably, the front and rear crossbeams have a certain degree of elastic deformation capability.

[0014] Preferably, a crossbeam is connected between the two arms connecting the front crossbeam and the slide tube, or / and between the two arms connecting the rear crossbeam and the slide tube.

[0015] Preferably, multiple connection points at different heights are provided between the two arms connecting the front crossbeam and the slide tube, and / or between the two arms connecting the rear crossbeam and the slide tube. The crossbeams are connected to the connection points at different heights according to the deformation requirements of the front and rear crossbeams.

[0016] Preferably, the angle between the planes of the front and rear crossbeams and the plane of the slide tube is matched with the load on the aircraft during landing.

[0017] Preferably, the front crossbeam and the rear crossbeam are straight bars in the middle position.

[0018] Preferably, there are at least two fuselage joints on the front crossbeam and at least two on the rear crossbeam.

[0019] Preferably, the planes containing the front and rear crossbeams are inclined forward relative to the plane containing the slide tube. The front crossbeam is hinged to the slide tube, and the front crossbeam and the slide tube have a rotational degree of freedom in the pitch direction within a preset angle range. An elastic plate is provided at the angle between the front crossbeam and the slide tube, connecting the front crossbeam and the slide tube. The rear crossbeam is hinged to the slide tube, and the rear crossbeam and the slide tube have a rotational degree of freedom in the pitch direction within a preset angle range. An elastic plate is provided at the angle between the rear crossbeam and the slide tube, connecting the rear crossbeam and the slide tube.

[0020] Preferably, limiting blocks are provided at the hinge point between the front crossbeam and the slide tube, and the crossbeam has a certain degree of rotational freedom between the front and rear limiting blocks. Similarly, limiting blocks are provided at the hinge point between the rear crossbeam and the slide tube, and the rear crossbeam has a certain degree of rotational freedom between the front and rear limiting blocks.

[0021] Preferably, the elastic plate has a preload that causes the front and rear crossbeams to rotate backward. When the landing gear is subjected to a load upon landing, the elastic plate bends, and the front and rear crossbeams rotate forward, allowing the elastic plate to absorb the load impact.

[0022] The advantages of this application include: reduced landing gear and aircraft load; reduced skid landing gear and aircraft weight; improved skid landing gear cushioning performance; and reduced aircraft manufacturing costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the skid-type landing gear structure of Example 1. Detailed Implementation

[0024] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0025] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0026] Implementation

[0027] like Figure 1 As shown, in order to solve the above problems, this application provides a skid-type landing gear structure, including:

[0028] Slide tube 4, including two arranged at different tilt angles;

[0029] The front crossbeam 1 is connected to the front end of the two sliding tubes 4;

[0030] The rear crossbeam 2 is connected to the rear end of the two sliding tubes 4;

[0031] The body connector 3 is installed on the front crossbeam 1 and the rear crossbeam 2 to connect the front crossbeam 1 and the rear crossbeam 2 to the body;

[0032] Both the front crossbeam 1 and the rear crossbeam 2 curve upwards, forming an arc-shaped bow.

[0033] The front end of the slide tube 4 is tilted upwards to facilitate its sliding on the ground.

[0034] The slide tube 4 is connected to the front crossbeam 1 and the rear crossbeam 2 via a connector 5. The connector 5 includes a sleeve and an mounting piece located at one end of the sleeve. The mounting piece is fixedly connected to the surface of the slide tube 4. The sleeve is fixedly sleeved to both ends of the front crossbeam 1 and the rear crossbeam 2.

[0035] The plane containing the front crossbeam 1 and the rear crossbeam 2 is inclined forward relative to the plane containing the slide tube 4.

[0036] The front crossbeam 1 and the rear crossbeam 2 have a certain elastic deformation capacity.

[0037] The angle between the planes of the front crossbeam 1 and the rear crossbeam 2 and the plane of the slide tube 4 is matched to the load of the aircraft during landing.

[0038] The front crossbeam 1 and the rear crossbeam 2 are straight bars in the middle position.

[0039] There are at least two fuselage joints 3 on the front crossbeam 1 and the rear crossbeam 2 respectively. Example

[0040] A skid-type landing gear structure includes:

[0041] Slide tube 4, including two arranged at different tilt angles;

[0042] The front crossbeam 1 is connected to the front end of the two sliding tubes 4;

[0043] The rear crossbeam 2 is connected to the rear end of the two sliding tubes 4;

[0044] The body connector 3 is installed on the front crossbeam 1 and the rear crossbeam 2 to connect the front crossbeam 1 and the rear crossbeam 2 to the body;

[0045] Both the front crossbeam 1 and the rear crossbeam 2 curve upwards, forming an arc-shaped bow.

[0046] The front end of the slide tube 4 is tilted upwards to facilitate its sliding on the ground.

[0047] The slide tube 4 is connected to the front crossbeam 1 and the rear crossbeam 2 via a connector 5. The connector 5 includes a sleeve and an mounting piece located at one end of the sleeve. The mounting piece is fixedly connected to the surface of the slide tube 4. The sleeve is fixedly sleeved to both ends of the front crossbeam 1 and the rear crossbeam 2.

[0048] The plane containing the front crossbeam 1 and the rear crossbeam 2 is inclined forward relative to the plane containing the slide tube 4.

[0049] The front crossbeam 1 and the rear crossbeam 2 have a certain elastic deformation capacity.

[0050] A crossbeam is connected between the two arms connecting the front crossbeam 1 and the slide tube 4, or / and between the two arms connecting the rear crossbeam 2 and the slide tube 4. Example

[0051] A skid-type landing gear structure includes:

[0052] Slide tube 4, including two arranged at different tilt angles;

[0053] The front crossbeam 1 is connected to the front end of the two sliding tubes 4;

[0054] The rear crossbeam 2 is connected to the rear end of the two sliding tubes 4;

[0055] The body connector 3 is installed on the front crossbeam 1 and the rear crossbeam 2 to connect the front crossbeam 1 and the rear crossbeam 2 to the body;

[0056] Both the front crossbeam 1 and the rear crossbeam 2 curve upwards, forming an arc-shaped bow.

[0057] The front end of the slide tube 4 is tilted upwards to facilitate its sliding on the ground.

[0058] The plane containing the front crossbeam 1 and the rear crossbeam 2 is inclined forward relative to the plane containing the slide tube 4, and the front crossbeam 1 and the rear crossbeam 2 have a certain elastic deformation capacity.

[0059] The angle between the planes of the front crossbeam 1 and the rear crossbeam 2 and the plane of the slide tube 4 is matched to the load of the aircraft during landing.

[0060] The plane containing the front crossbeam 1 and the rear crossbeam 2 is inclined forward relative to the plane containing the slide tube 4. The front crossbeam 1 and the slide tube 4 are hinged together, and the front crossbeam 1 and the slide tube 4 have a degree of rotational freedom in the pitch direction within a preset angle range. An elastic plate is provided at the angle between the front crossbeam 1 and the slide tube 4 to connect the front crossbeam 1 and the slide tube 4. The rear crossbeam 2 is hinged to the slide tube 4, and the rear crossbeam 2 and the slide tube 4 have a degree of rotational freedom in the pitch direction within a preset angle range. An elastic plate is provided at the angle between the rear crossbeam 2 and the slide tube 4 to connect the rear crossbeam 2 and the slide tube 4.

[0061] Limiting blocks are set at the hinge point between the front crossbeam 1 and the slide tube 4, and the crossbeam 1 has a certain degree of rotational freedom between the front and rear limiting blocks. Limiting blocks are also set at the hinge point between the rear crossbeam 2 and the slide tube 4, and the rear crossbeam 2 has a certain degree of rotational freedom between the front and rear limiting blocks.

[0062] The elastic plate has a preload that causes the front crossbeam 1 and the rear crossbeam 2 to rotate backward. When the landing gear is subjected to load upon landing, the elastic plate bends, and the front crossbeam 1 and the rear crossbeam 2 rotate forward, with the elastic plate absorbing the load impact.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A skid-type landing gear structure, characterized in that, include: The sliding tube (4) includes two tubes arranged at different inclination angles; The front crossbeam (1) is connected to the front end of the two sliding tubes (4); The rear crossbeam (2) is connected to the rear end of the two sliding tubes (4); The fuselage connector (3) is installed on the front crossbeam (1) and the rear crossbeam (2) to connect the front crossbeam (1) and the rear crossbeam (2) to the fuselage; Among them, the front crossbeam (1) and the rear crossbeam (2) both curve upward to form an arc-shaped bow; The planes of the front crossbeam (1) and the rear crossbeam (2) are inclined forward relative to the plane of the slide tube (4). The front crossbeam (1) and the slide tube (4) are hinged together. The front crossbeam (1) and the slide tube (4) have a degree of rotational freedom in the pitch direction within a preset angle range. An elastic plate is provided at the angle between the front crossbeam (1) and the slide tube (4) to connect the front crossbeam (1) and the slide tube (4). The rear crossbeam (2) and the slide tube (4) are hinged together. The rear crossbeam (2) and the slide tube (4) have a degree of rotational freedom in the pitch direction within a preset angle range. An elastic plate is provided at the angle between the rear crossbeam (2) and the slide tube (4) to connect the rear crossbeam (2) and the slide tube (4).

2. The skid-type landing gear structure as described in claim 1, characterized in that, The front end of the slide tube (4) is tilted upwards to facilitate the sliding of the slide tube (4) on the ground.

3. The skid-type landing gear structure as described in claim 1, characterized in that, The slide tube (4) is connected to the front crossbeam (1) and the rear crossbeam (2) through a connector (5). The connector (5) includes a sleeve and an mounting piece located at one end of the sleeve. The mounting piece is fixedly connected to the surface of the slide tube (4). The sleeve is fixedly sleeved to both ends of the front crossbeam (1) and the rear crossbeam (2).

4. The skid-type landing gear structure as described in claim 1, characterized in that, The front crossbeam (1) and the rear crossbeam (2) have elastic deformation capabilities.

5. The skid-type landing gear structure as described in claim 1, characterized in that, A crossbeam is connected between the two arms connecting the front crossbeam (1) and the slide tube (4) or / and between the two arms connecting the rear crossbeam (2) and the slide tube (4).

6. The skid-type landing gear structure as described in claim 1, characterized in that, Multiple connection points at different heights are provided between the two arms connecting the front crossbeam (1) and the slide tube (4) or / and between the two arms connecting the rear crossbeam (2) and the slide tube (4). The crossbeams are connected to the connection points at different heights according to the deformation requirements of the front crossbeam (1) and the rear crossbeam (2).

7. The skid-type landing gear structure as described in claim 1, characterized in that, The angle between the planes of the front crossbeam (1) and the rear crossbeam (2) and the plane of the slide tube (4) is matched with the load of the aircraft during landing.

8. The skid-type landing gear structure as described in claim 1, characterized in that, The front crossbeam (1) and the rear crossbeam (2) are straight rods in the middle position.

9. The skid-type landing gear structure as described in claim 1, characterized in that, The fuselage joint (3) has at least two on the front crossbeam (1) and the rear crossbeam (2).

10. The skid-type landing gear structure as described in claim 8, characterized in that, Limiting blocks are set at the hinge points of the front crossbeam (1) and the slide tube (4) respectively. The crossbeam (1) has rotational freedom between the front and rear limiting blocks. Limiting blocks are set at the hinge points of the rear crossbeam (2) and the slide tube (4) respectively. The rear crossbeam (2) has rotational freedom between the front and rear limiting blocks.

11. The skid-type landing gear structure as described in claim 9, characterized in that, The elastic plate has a preload that causes the front crossbeam (1) and the rear crossbeam (2) to rotate backward. When the landing gear is loaded on the ground, the elastic plate bends and the front crossbeam (1) and the rear crossbeam (2) rotate forward. The elastic plate absorbs the load impact.

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