Oil-tight aircraft landing gear intersection structure
The novel junction structure, consisting of bushings, bearings, rubber rings, and cap-shaped outer nuts, solves the problems of preventing oil leakage and bearing detachment at the landing gear junction on the side wall of the fuel tank, thereby improving the reliability and convenience of the structure.
Patent Information
- Application Number
- CN202423275465.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing aircraft landing gear junction structure on the side wall of the fuel tank cannot simultaneously achieve the effects of preventing oil leakage and preventing bearing loosening. Conventional designs have the risk of oil leakage or difficulty in preventing loosening.
A novel intersection structure consisting of a bushing, bearing, rubber ring, and cap-shaped outer nut is adopted. The oil tank is clamped by the threaded connection between the bushing and the cap-shaped outer nut, and the rubber ring and safety hole are used to prevent loosening, thereby fixing the bearing.
This design effectively prevents oil leakage and bearing detachment from the sidewalls of the oil tank, while also simplifying the design and improving structural reliability and ease of assembly.
Smart Images
Figure CN223803777U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to structural design technical field, concretely relates to an oil-tight type airplane landing gear intersection structure. BACKGROUND
[0002] The intersection position of airplane landing gear and fuselage structure is the landing gear intersection structure, generally the structure contains a series of parts such as bushing, nut, because of big load, violent vibration, convenient disassembly and the like, for this kind of structure, generally, the oil tank of the airplane should be avoided, or blind hole type intersection is used on the side wall of the oil tank to avoid fuel leakage. SUMMARY
[0003] The utility model discloses a purpose: the landing gear intersection of airplane is installed on the side wall of the oil tank and is difficult to avoid, and the blind hole intersection is used to avoid the good effect of oil leakage, but the difficulty of bearing anti -drop is greater, and the intersection design of conventional bushing + inner nut + outer nut type cannot prevent oil leakage. Therefore, a new type of landing gear intersection structure that can prevent oil leakage and bearing drop is needed.
[0004] The utility model discloses a technical scheme: an oil-tight type airplane landing gear intersection structure, the structure is composed of a bushing, a bearing, a rubber ring and a cap-shaped outer nut, the bushing is connected with the cap-shaped outer nut through threads, and the side wall of the oil tank is clamped in the middle, the cap-shaped outer nut is provided with a groove, and the rubber ring is arranged in the groove, and the bearing is fixed in the bushing.
[0005] Further, the rubber ring is circular in cross section and is deformed after being tightened.
[0006] Further, the cap-shaped outer nut is provided with six radial and uniformly distributed rib strips.
[0007] Further, the rib strip is provided with a safety hole for installing a safety wire to prevent loosening.
[0008] Further, the inner cavity end face of the cap-shaped outer nut is provided with a hexagonal pit for tightening and dismounting the cap-shaped outer nut.
[0009] Further, the end of the bushing is T-shaped, and the two sides are respectively overlapped on the end faces of the bearing and the side wall of the oil tank.
[0010] Beneficial technical effects: the oil-tight type airplane landing gear intersection structure not only prevents oil leakage, but also prevents bearing drop and bushing loosening. Meanwhile, the hexagonal pit of the cap-shaped nut is convenient for tightening and dismounting the cap-shaped outer nut by tools outside the oil tank. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 is a schematic diagram of an oil-tight type airplane landing gear intersection,
[0012] Figure 2is a A-A cross-sectional view,
[0013] Figure 3 is a schematic view of an oil-tight aircraft landing gear intersection structure,
[0014] Figure 4 is a schematic view of a cap-shaped nut.
[0015] Numbered explanation: 1-bushing, 2-cap-shaped nut, 3-rubber ring, 4-bearing, 5-main landing gear shaft, 6-tank side wall, 7-nut rib, 8-safety hole, 9-nut groove. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0017] As Figure 1 , an oil-tight aircraft landing gear intersection structure is generally located at the position where the aircraft landing gear intersects with the aircraft fuselage.
[0018] In the specific implementation process, an oil-tight aircraft landing gear intersection structure designed includes the following parts: bushing 1, bearing 4, rubber ring 3 and cap-shaped nut 2.
[0019] As Figure 2 , 3 , the bushing 1 is installed on the non-tank area side of the tank side wall 6, and the cap-shaped nut 2 is installed on the other side of the tank side wall 6 and is threadedly connected with the bushing 1; the bearing 4 is installed inside the bushing 1, one end face of the bearing 4 is in contact with the shoulder of the bushing 1, and the other end is pressed against the end face of the cap-shaped nut 2; the rubber ring 3 is installed in the nut groove 9 of the cap-shaped nut 2 and is in contact with the tank side wall 6.
[0020] In the specific design, the end of the bushing 1 is in T-shaped structure, and the two sides are respectively overlapped on the end faces of the bearing 4 and the tank side wall 6, so that better fixed cooperation is achieved.
[0021] As Figure 4 , the cap-shaped nut 2 is provided with a nut rib 7, and the nut rib 7 is provided with a safety hole 8 for playing a safety anti-loose function together with the safety hole on the tank side wall 6.
[0022] The utility model takes a certain type of aircraft as an example, directly designs the main intersection of the landing gear on the tank side wall, which not only eliminates the shortcomings of the blind hole design bearing difficult to prevent loosening, but also realizes the design of the landing gear intersection to prevent oil leakage.
[0023] There are two kinds of conventional designs at present: one is to adopt the conventional bushing + inner nut + outer nut form; the other is to install the bushing in the blind hole. However, the utility model is different from the two: it is composed of four parts of bushing, bearing, rubber ring and outer nut. And it has better use effect than the above two conventional designs.
[0024] Firstly, compared with the traditional bushing + inner nut + outer nut form design, the utility model is designed to prevent leakage, and can be installed at the intersection of the landing gear at the oil tank.
[0025] Secondly, compared with the traditional bushing + inner nut + outer nut form design, the utility model simplifies the two parts of inner nut and outer nut into one cap-shaped outer nut, which simplifies the design, improves the structural reliability, facilitates assembly and maintenance.
[0026] Thirdly, compared with the traditional blind hole + bushing intersection structure design, the cap-shaped outer nut of the utility model is connected with the bushing by thread, clamps the aircraft structure in the middle, prevents the loosening and falling out of the bushing, and at the same time, the cap-shaped outer nut also abuts against the bearing, which can better prevent the falling out of the bearing.
[0027] The above is only a specific embodiment of the utility model, which is described in detail, and the part not described in detail is the conventional technology. However, the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. The protection scope of the utility model should be subject to the protection scope of the claims.
Claims
1. An oilite aircraft landing gear intersection structure, characterized by, The structure is composed of a bushing, a bearing, a rubber ring and a cap-shaped outer nut; the bushing and the cap-shaped outer nut are connected by threads to sandwich the side wall of the oil tank; the cap-shaped outer nut is provided with a groove, and the rubber ring is arranged in the groove; and the bearing is fixed in the bushing.
2. An oilite aircraft landing gear intersection structure as claimed in claim 1, wherein, The cross section of the rubber ring is circular, and the rubber ring is deformed after being screwed.
3. An oilite aircraft landing gear intersection structure as claimed in claim 1 wherein, The cap-shaped outer nut is provided with six radial and uniformly distributed ribs.
4. An oilite aircraft landing gear intersection structure as claimed in claim 3, wherein, The ribs are provided with safety holes for installing safety wires to prevent loosening.
5. An oil tight aircraft landing gear intersection structure as claimed in claim 1, wherein, The inner cavity end surface of the cap-shaped outer nut is provided with a hexagonal pit, which is used for screwing and dismounting the cap-shaped outer nut.
6. An oilite aircraft landing gear intersection structure as claimed in claim 1 wherein, The end of the bushing is in T-shaped structure, and the two sides are respectively overlapped on the end surface of the bearing and the side wall of the oil tank.