A skid-type landing gear
By nesting high-strength reinforcing tubes inside the bow-shaped beam of the skid landing gear, the problem of short service life of the bow-shaped beam is solved, achieving higher impact resistance and service life, and improving the structural durability of the skid landing gear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIFEI ZHIHANG TECHNOLOGY (XIAN) CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-14
Smart Images
Figure CN224491479U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of landing gear technology, and more particularly to a skid-type landing gear. Background Technology
[0002] Skid landing gear refers to a landing gear system that uses skids instead of wheels to facilitate take-off and landing of aircraft on icy or soft ground. This type of landing gear has a simple and reliable structure, is easy to manufacture and maintain, and can also absorb the impact energy generated by vertical speed during landing and withstand the overload caused by landing impact.
[0003] Skid-type landing gear typically uses an arc-shaped beam to provide primary cushioning and support, with the skid tube contacting the ground. However, the arc-shaped beam deforms irreversibly during use, resulting in a relatively short service life. Utility Model Content
[0004] The main objective of this application is to provide a skid-type landing gear that addresses the problem of short service life of bow-shaped beams.
[0005] To achieve the above objectives, this application provides a skid-type landing gear, which includes two slide tubes, at least two bow-shaped beams, and a reinforcing tube. The two slide tubes are spaced apart in a first direction, which is a horizontal direction. The at least two bow-shaped beams are spaced apart in the axial direction of the slide tubes, and each end of the bow-shaped beam is connected to one of the slide tubes. The bow-shaped beams are hollow. The reinforcing tubes correspond one-to-one with the bow-shaped beams and are embedded in the corresponding bow-shaped beams.
[0006] Optionally, the bow-shaped beam includes a bent section, a horizontal section, and a bent section connected in sequence; two bent sections are disposed opposite to each other at both ends of the horizontal section and are respectively connected to a sliding tube; wherein, the reinforcing tube is embedded in the horizontal section, and both ends of the reinforcing tube extend into one of the bent sections.
[0007] Optionally, the reinforcing tube extends into each of the bent sections by the same length.
[0008] Optionally, the skid-type landing gear further includes multiple end caps, which are respectively disposed at both ends of each of the skid tubes to seal the skid tubes.
[0009] Optionally, the skid-type landing gear further includes multiple right-angle plates, which are correspondingly disposed at the connection between the bow-shaped beam and the slide tube. Each bow-shaped beam has two right-angle plates that are axially opposite to each other on the slide tube at its end. Each right-angle plate has two straight sides, one of which is connected to the bow-shaped beam and the other of which is connected to the slide tube.
[0010] Optionally, each of the slide tubes is equipped with two sets of sleeve assemblies, and the two sets of sleeve assemblies are located on both sides of the area where the bow beam is located in the axial direction of the slide tube; the sleeve assembly includes a tooling connecting sleeve, which penetrates the slide tube and has the same axial direction as the first direction.
[0011] Optionally, the outer periphery of the cross section of the bow beam perpendicular to its own axis is airfoil-shaped or circular.
[0012] Optionally, the outer periphery of the cross section of the slide tube perpendicular to its own axis is semi-circular, and in the direction of gravity, the horizontal side of the semi-circular shape is located below the slide tube.
[0013] Optionally, the bow-shaped beam and the sliding tube are connected by welding.
[0014] Optionally, the material of the sliding tube and the bow beam is TA18, and the material of the reinforcing tube is TC4.
[0015] The present application proposes a skid-type landing gear in which a high-strength reinforcing tube is nested inside the bow-shaped beam, which can significantly improve the impact resistance of the bow-shaped beam and effectively extend its service life. Attached Figure Description
[0016] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.
[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0018] Figure 1 This is a schematic diagram of the overall structure of a skid-type landing gear according to an embodiment of this application;
[0019] Figure 2 for Figure 1 A structural schematic diagram from another perspective of the embodiment;
[0020] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;
[0021] Figure 4 forFigure 1 A structural schematic diagram from another perspective of the embodiment;
[0022] Figure 5 for Figure 1 A structural breakdown diagram of the Chinese embodiment;
[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the bow-shaped beam according to an embodiment of this application.
[0024] In the diagram: 1. Sliding tube; 2. Arched beam; 21. Bending section; 22. Horizontal section; 3. Reinforcing tube; 4. End cap; 5. Right angle plate; 6. Tooling connecting sleeve.
[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0030] The present application will now be described in detail with reference to the accompanying drawings and embodiments.
[0031] Figure 1 This is a schematic diagram of the overall structure of a skid-type landing gear according to an embodiment of this application; Figure 2 for Figure 1 A structural schematic diagram from another perspective of the embodiment; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 for Figure 1 A structural schematic diagram from another perspective of the embodiment; Figure 5 for Figure 1 A structural breakdown diagram of the Chinese embodiment; Figure 6 This is a schematic diagram of the cross-sectional structure of the bow-shaped beam according to an embodiment of this application.
[0032] refer to Figures 1 to 6 It should be understood that, Figure 5 The connections between the various components should be like Figure 1 As compact as in the middle, this is only for illustrative purposes and will Figure 5 The reinforcing tube 3 is separated into an arc-shaped beam 2 for easy understanding. This application embodiment provides a skid-type landing gear, which may include two sliding tubes 1, at least two arc-shaped beams 2 and a reinforcing tube 3. The two sliding tubes 1 are spaced apart in a first direction, which is a horizontal direction. At least two arc-shaped beams 2 are spaced apart in the axial direction of the sliding tubes 1, and the two ends of the arc-shaped beams 2 are respectively connected to a sliding tube 1. The arc-shaped beams 2 are hollow structures. The reinforcing tubes 3 correspond one-to-one with the arc-shaped beams 2 and are embedded in the corresponding arc-shaped beams 2.
[0033] The present application provides a skid-type landing gear in which a high-strength reinforcing tube 3 is nested inside the bow-shaped beam 2, which can significantly improve the impact resistance of the bow-shaped beam 2 and extend its service life.
[0034] Specifically, the bow beam 2 and the slide tube 1 are both made of TA18 titanium alloy, which has high specific strength and excellent weldability; the reinforcing tube 3 is made of TC4 titanium alloy, which has high specific strength and high toughness.
[0035] When the bow-shaped beam 2 is being formed, the reinforcing tube 3 is embedded into the bow-shaped beam 2 in advance. Then, the bow-shaped beam 2 and the reinforcing tube 3 are bent simultaneously to complete the manufacturing process.
[0036] The end of the bow-shaped beam 2 is connected to the slide tube 1 by welding.
[0037] It should be understood that when the landing gear is connected to the aircraft, the axis of the slide tube 1 should be parallel to the longitudinal direction of the aircraft, which refers to the horizontal direction from the nose to the tail of the aircraft.
[0038] refer to Figure 1 In an exemplary embodiment, the bow beam 2 may include a bent section 21, a horizontal section 22 and a bent section 21 connected in sequence; the two bent sections 21 are disposed opposite to each other at both ends of the horizontal section 22 and are respectively connected to a sliding tube 1; wherein, the reinforcing tube 3 is embedded in the horizontal section 22 and both ends of the reinforcing tube 3 extend into a bent section 21 respectively.
[0039] It should be understood that the two bent sections 21 and the horizontal section 22 are an integral structure, formed by bending a single pipe. The connection area between the two bent sections 21 and the horizontal section 22 is the bending area. Thus, the two bent sections 21 and the horizontal section 22 are set at an angle, making the bow beam 2 as a whole "U" shape. The angle between the bent section 21 and the horizontal section 22 should be greater than 90° so that the bending area connecting the bow beam 2 and the two bent sections 21 can bear the load during takeoff and landing of the aircraft.
[0040] Furthermore, both ends of the reinforcing tube 3 extend into a bend section 21, allowing the reinforcing tube 3 to cross the two bend areas of the bow beam 2, thereby effectively strengthening the load-bearing capacity of the two bend areas of the bow beam 2 and improving the service life of the bow beam 2. Moreover, fasteners are not required to assemble the reinforcing tube 3, reducing the amount of assembly work.
[0041] It should be understood that, as Figure 6 As shown, the reinforcing tube 3 is embedded in the arched beam 2, so the reinforcing tube 3 also has two bending areas.
[0042] Furthermore, the reinforcing pipe 3 extends into each bend section 21 by the same length, which can ensure that the two bend areas of the reinforcing pipe 3 are subjected to balanced and equal loads.
[0043] refer to Figure 1 In an exemplary embodiment, the skid landing gear may further include multiple end caps 4, which are respectively disposed at both ends of each skid tube 1 to seal the skid tube 1.
[0044] Specifically, after sealing the end caps 4 at both ends of the slide pipe 1, the integrity of the slide pipe 1 structure can be guaranteed, effectively preventing flying sand and stones from entering the interior of the slide pipe 1, and ensuring that the mechanical properties of the slide pipe 1 are not affected.
[0045] The end cap 4 and the slide tube 1 can be connected by welding.
[0046] refer to Figure 1 and Figure 2 In an exemplary embodiment, the skid landing gear may further include a plurality of right-angle plates 5, which are respectively disposed at the connection between the bow beam 2 and the slide tube 1. Each bow beam 2 has two right-angle plates 5 that are axially opposite to each other at its end. The right-angle plate 5 has two straight sides, one of which is connected to the bow beam 2 and the other of which is connected to the slide tube 1.
[0047] Specifically, the right-angle plate 5 can be connected to the bent section 21 of the bow beam 2 and the sliding tube 1 by welding. The straight side of the right-angle plate 5 is the right-angle side. When the two straight sides of the right-angle plate 5 are connected to the bow beam 2 and the sliding tube 1 respectively, the right-angle plate 5 can effectively support the bow beam 2; at the same time, at one end of the bow beam 2, such as Figure 2 As shown, two right-angled plates 5 are arranged opposite each other on both sides of the bow-shaped beam 2 along the axial direction of the slide tube 1, which can effectively support the bow-shaped beam 2 and keep the bow-shaped beam 2 in a stable position. Figure 2 The vertical position shown facilitates the stress and load-bearing of the bow beam 2.
[0048] refer to Figures 1 to 3 In an exemplary embodiment, each slide tube 1 is equipped with two sets of sleeve assemblies. In the axial direction of the slide tube 1, the two sets of sleeve assemblies are located on both sides of the area where the bow beam 2 is located. The sleeve assembly may include a tooling connecting sleeve 6, which penetrates the slide tube 1 and has the same axial direction as the first direction.
[0049] The tooling connection sleeve 6 facilitates the threading of ropes through it for lifting and transporting the landing gear. Specifically, each slide tube 1 is equipped with two sets of sleeve assemblies. Along the axial direction of the slide tube 1, the two sets of sleeve assemblies are located on both sides of the area where the bow beam 2 is located. This facilitates the connection of the slide tube 1 at the four corners for lifting. The force points of the two slide tube 1 are distributed in a rectangular pattern, making the lifting more stable.
[0050] Furthermore, the sleeve assembly may include two tooling connecting sleeves 6, and the two tooling connecting sleeves 6 are spaced apart axially on the slide tube 1, thereby increasing the stress points during the hoisting process and making the hoisting process more stable.
[0051] In an exemplary embodiment, the outer periphery of the section of the bow beam 2 perpendicular to its own axis is airfoil-shaped or circular.
[0052] like Figure 1 As shown in the figure, the outer periphery of the cross section of the bow beam 2 perpendicular to its own axis is circular, that is, the bow beam 2 is a circular tube. In the preferred embodiment, the outer periphery of the cross section of the bow beam 2 perpendicular to its own axis is an airfoil, which can reduce the flight drag of the aircraft. There are many traditional schemes for specific airfoil cross sections, and the airfoil cross sections will not be described in detail here.
[0053] In an exemplary embodiment, the outer periphery of the cross section of the slide tube 1 perpendicular to its own axis is semi-circular, and in the direction of gravity, the horizontal side of the semi-circular shape is located below the slide tube 1.
[0054] Specifically, the outer periphery of the semi-circular slide tube 1 has a flat surface, and the horizontal edge of the semi-circle is located below the slide tube 1, that is, the flat surface of the outer periphery of the slide tube 1 contacts the ground. This can effectively increase the contact area between the slide tube 1 and the ground, thereby improving the stability of take-off and landing.
[0055] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A skid-type landing gear, characterized in that, include: Two sliding tubes (1) are spaced apart in a first direction, which is a horizontal direction; At least two bow-shaped beams (2) are spaced apart along the axial direction of the slide tube (1), and the two ends of the bow-shaped beams (2) are respectively connected to one of the slide tubes (1), wherein the bow-shaped beams (2) are hollow structures; The reinforcing tube (3) corresponds one-to-one with the bow beam (2) and is embedded in the corresponding bow beam (2).
2. The skid-type landing gear as described in claim 1, characterized in that, The bow-shaped beam (2) includes a bent section (21), a horizontal section (22), and a bent section (21) connected in sequence. The two bent sections (21) are disposed opposite to each other at both ends of the horizontal section (22) and are respectively connected to one of the sliding tubes (1); The reinforcing tube (3) is embedded in the horizontal section (22), and both ends of the reinforcing tube (3) extend into a bent section (21).
3. The skid-type landing gear as described in claim 2, characterized in that, The reinforcing tube (3) extends into each of the bent sections (21) by the same length.
4. The skid-type landing gear as described in claim 1, characterized in that, The skid landing gear also includes: Multiple end caps (4) are respectively disposed at both ends of each of the slide tubes (1) to seal the slide tubes (1).
5. The skid-type landing gear as described in claim 1, characterized in that, The skid landing gear also includes: Multiple right-angle plates (5) are respectively set at the connection between the bow beam (2) and the slide tube (1), and two right-angle plates (5) are respectively set at the ends of the bow beam (2) opposite to each other in the axial direction of the slide tube (1). The right-angle plate (5) has two straight sides, one of which is connected to the bow beam (2), and the other of which is connected to the slide tube (1).
6. The skid-type landing gear as described in claim 1, characterized in that, Each of the sliding tubes (1) is equipped with two sets of sleeve assemblies, and the two sets of sleeve assemblies are located on both sides of the area where the bow beam (2) is located along the axial direction of the sliding tube (1); the sleeve assembly includes: The tooling connecting sleeve (6) penetrates the slide tube (1) and its axial direction is the same as the first direction.
7. The skid-type landing gear as described in claim 1, characterized in that, The outer periphery of the cross section of the bow beam (2) perpendicular to its own axis is airfoil or circular.
8. The skid-type landing gear as described in claim 1, characterized in that, The outer periphery of the cross section of the slide tube (1) perpendicular to its own axis is semi-circular, and in the direction of gravity, the horizontal side of the semi-circular section is located below the slide tube (1).
9. The skid-type landing gear as described in claim 1, characterized in that, The bow-shaped beam (2) and the sliding tube (1) are connected by welding.
10. The skid-type landing gear as described in claim 1, characterized in that, The material of the sliding tube (1) and the bow beam (2) is TA18, and the material of the reinforcing tube (3) is TC4.