A flap hinge structure

Abstract

The utility model relates to a kind of mouth cover hinge structure, belong to aircraft body structure field;Mouth cover hinge structure includes mouth cover, support, hinge and mouth cover lock.Mouth cover covers in the mouth cover hole of body, for opening to carry out body internal maintenance;Support is fixed in the inner wall of body in mouth cover hole side;Hinge one end and support articulate, other end and the inner fixed connection of mouth cover;Mouth cover lock is used for the locking of mouth cover and body;Mouth cover is unlocked, and it is turned over to body outside around the articulation shaft of hinge, and corresponding hinge rotating area is provided with strip-shaped through slot on body for avoiding hinge.The structure, support and hinge occupy less internal space of body, hinge is turned over outside with mouth cover when mouth cover opens, does not occupy internal space, and it is suitable for the layout of mouth cover in the narrow space of body interior.

Description

Technical Field

[0001] This utility model relates to the field of aircraft airframe structure, specifically to a flap hinge structure. Background Technology

[0002] Maintenance access panels on aircraft are frequently opened and closed, and are typically connected to the fuselage using fasteners such as plate nuts, bolts, pins, and quick-release locks. In this structure, disassembly and installation of these fasteners often require tools, which is time-consuming and labor-intensive, and carries the risk of losing or misinstalling standard parts during the process. Excessive disassembly and installation can also cause deformation of the holes in the standard parts.

[0003] To avoid the inconvenience of the aforementioned types of hatch connection structures, a trigger-type hatch lock + hinge connection method was developed. The hatch is installed via the hinge, and the trigger-type hatch lock locks the hatch to the fuselage. In the trigger-type hatch lock + hinge structure, installing the hinge guide bar requires a notch in the fuselage structure, resulting in poor hatch sealing. Additionally, the hinge guide bar may protrude from the theoretical surface, affecting local aerodynamic performance. To avoid the shortcomings of the hinge connection structure, a trigger-type hatch lock + gooseneck joint connection is typically used. The gooseneck joint hinges the hatch to the fuselage, and the hatch lock locks the hatch to the fuselage. In the trigger-type hatch lock + gooseneck joint structure, the gooseneck joint requires a large movement space to ensure the hatch opening angle. This can be problematic when the maintenance hatch is located in a confined space, such as the engine fan cowling of an aircraft, where the interior is filled with engine accessories or system piping and has limited space. If a gooseneck connector structure is used, the gooseneck connector needs to be fixed inside the engine fan shroud structure. The movement space of the gooseneck connector will be limited by the engine accessories or system pipes inside, which makes it impossible to guarantee the required angle of the cover opening outwards, making it unsuitable for applications with narrow opening spaces.

[0004] Therefore, there is a need for a cover hinge structure that can be used in confined spaces and can be opened and closed quickly to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved:

[0006] To avoid the shortcomings of the prior art, this utility model provides a lid hinge structure. By installing a support on the inner wall of the machine body and fixing a hinge on the inner wall of the lid, the hinge is hinged to the support. A strip-shaped through groove is provided on the machine body at the position corresponding to the hinge, so that the hinge can drive the lid to flip outward and open. The support occupies less internal space, and the hinge does not occupy internal space when the lid is opened, thus solving the existing problems.

[0007] The technical solution of this utility model is: a lid hinge structure, comprising:

[0008] The cover fits onto the cover hole of the machine body and is used to open the machine body for internal maintenance.

[0009] The support is fixed to the inner wall of the machine body and is located on one side of the machine body cover hole;

[0010] The hinge has one end hinged to the support and the other end fixed to the inner wall of the cover. The hinge is used to drive the cover to rotate outward around its hinge axis.

[0011] And the cover lock, which is installed on the inner wall of the cover away from the hinge joint, and the cover lock is used to lock the cover to the body;

[0012] The machine body has a first through groove corresponding to the hinge rotation area. The first through groove is used to prevent the hinge from interfering with the machine body when it flips.

[0013] A further technical solution of this utility model is: the support is a double-ear support, which includes two parallel ears, and the bottom of each ear is provided with an outwardly folded mounting part, which is used to fix and connect with the body; a hinge shaft is vertically inserted on the two parallel ears, which is used to hinge with one end of the hinge; the top of the two ears is connected by a top plate, which is used to limit the hinge when it flips into the body.

[0014] A further technical solution of this utility model is: one end of the hinge is a single-ear structure, and the end is provided with a hinge hole. The hinge hole end is inserted between the two ears of the support, and the hinge shaft is simultaneously installed in the hinge hole of the hinge; the other end of the hinge is provided with a fixing plate, and the fixing plate is fixedly connected to the inner wall of the cover.

[0015] A further technical solution of this utility model is: bushings are installed in the holes on the two lugs of the support for mounting the hinge shaft, and bushings are installed in the hinge hole of the hinge, the bushings playing a role in reducing friction.

[0016] A further technical solution of this utility model is: the hinge shaft is made of bolt, and one end of the bolt is locked by a nut to prevent it from coming loose.

[0017] A further technical solution of this utility model is: an annular frame is fixed inside the cover hole of the machine body, the outer edge of the frame is fixedly connected to the inner wall of the machine body, and the inner edge of the frame overlaps with the inner wall edge of the cover; a second through groove is provided on the frame, the second through groove communicates with the first through groove and has the same width, the frame is used to reinforce the periphery of the cover hole of the machine body and to overlap the cover.

[0018] A further technical solution of this utility model is: the cover lock is a push-button spring latch lock, the unlocking switch is located on the outer wall of the cover, and the lock is unlocked by pressing the switch; when locked, the latch of the cover lock rests on the inner wall of the cover frame.

[0019] A further technical solution of this utility model is: a layer of rubber sealing gasket is bonded between the contact surfaces of the mouth frame and the mouth cover, and the rubber sealing gasket plays a role in buffering and wear resistance.

[0020] A further technical solution of this utility model is: two supports are arranged side by side, and two hinges are provided accordingly.

[0021] The beneficial effects of this utility model are as follows: This utility model provides a cover hinge structure, in which a support is installed on the inner wall of the structural shell of the machine body, and a hinge is installed on the inner wall of the cover. The hinge and the support are hinged together. When the cover on the machine body and the cover frame is flipped outward to open, the hinge flips outward around its hinge axis. A strip-shaped through groove is provided on the machine body and the cover frame at the position corresponding to the hinge to avoid the hinge. In this structure, the total height of the support does not occupy too much internal space, the height of the hinge when the cover is closed does not exceed that of the support, and the hinge occupies external space of the machine body during movement. When this cover hinge structure is installed at the engine fan shroud, the movement of the hinge will not interfere with the internal engine accessories or system pipelines of the machine body.

[0022] In this utility model structure, bushings are installed in the hinge shaft mounting holes on the two lugs of the support and in the hinge holes on the hinge. The bushings play a wear-resistant role. During use, the hinge shaft rubs against the bushing. When the bushing is severely worn, it can be directly replaced, thereby improving the service life of the support and the hinge.

[0023] This utility model's cover opens and closes flexibly without tools. Because the hinge does not occupy internal space when rotating, it is suitable for installation in confined spaces (such as the engine fan cowl of an aircraft, where engine accessories or system piping are close to the engine fan cowl structure). The overall structure is simple, reliable, easy to manufacture, and low in cost, making it worthy of widespread use. When used for installation on engine fan cowls, this utility model solves the problem of insufficient hinge rotation space when the cover is too close to engine accessories or system piping, and also shortens the hinge's travel distance, enabling rapid opening and closing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of a flap hinge structure of the present invention (the internal structure of the machine body).

[0026] Figure 2This is a schematic diagram of the overall structure of a flap hinge structure according to the present invention (the external structure of the machine body).

[0027] Figure 3 This is a schematic diagram of the process of the cover flipping outwards to open in this utility model;

[0028] Figure 4 This is an exploded view of the support and hinge connection in this utility model;

[0029] Figure 5 This is a schematic diagram of the hinge structure in this utility model;

[0030] Figure 6 This is a schematic diagram showing the positional relationship between the mouth cover, mouth frame, and body.

[0031] In the diagram: 1. Hinge, 11. Hinge hole, 12. Fixing plate, 2. Cover, 3. Support, 31. Support lug, 32. Mounting part, 33. Top plate, 4. Frame, 41. Second strip through groove, 5. Body, 51. Cover hole, 52. First strip through groove, 6. Bolt, 7. Bushing, 8. Nut, 9. Cover lock, 91. Switch, 92. Lock tongue, 10. Rubber sealing gasket. Detailed Implementation

[0032] 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.

[0033] One embodiment of the flap hinge structure of this utility model is as follows: Figures 1-3 As shown, the hatch hinge structure includes: hinge 1, hatch 2, support 3, hatch frame 4, and hatch lock 9. A hatch hole 51 is provided on the structural shell of the fuselage 5 (specifically on the engine fan cover shell of the aircraft in this embodiment). The hatch 2 is hinged to the hatch hole 51, and maintenance of the interior of the fuselage 5 can be carried out by opening the hatch 2.

[0034] The cover 2 is hinged to the body 5 via a support 3 and a hinge 1. There are two supports 3, which are installed side by side on the inner wall of the body 5 and located on one side of the cover hole 51. The two hinges 1 and the two supports 3 correspond one-to-one. One end of the hinge 1 is hinged to the support 3, and the other end is fixed to the inner wall of the cover 2. The hinge 1 is used to drive the cover 2 to rotate outward around its hinge axis to the body 5.

[0035] Specifically, such as Figure 3 , Figure 4As shown, the support 3 is a double-ear support, comprising two parallel ears 31. Each ear 31 has an outwardly flared mounting portion 32 at its bottom. Multiple bolt holes are symmetrically arranged on both sides of the mounting portion 32, allowing for secure connection to the body 5 via high-strength bolts. Each of the two parallel ears 31 has a mounting hole for a hinge shaft, which is used to hinge one end of the base 3 to the hinge 1. In this embodiment, a bolt 6 is used as the hinge shaft. The bolt 6 is vertically inserted into the two ears 31, and locked at the threaded end of the bolt 6 by a nut 8 to prevent the bolt 6 from dislodging from the support 3. The bolt 6 is used for hinge connection to one end of the hinge 1.

[0036] Hinge 1 serves as a connecting rod, with one end having a single-ear structure and a hinge hole 11. The hinge hole 11 is inserted between the two ears 31 of the support 3, and bolt 6 is simultaneously inserted into the hinge hole 11 of hinge 1 to achieve hinge connection between hinge 1 and support 3. The other end of hinge 1 has a fixing plate 12, which fits against the inner wall of cover 2. The fixing plate 12 and cover 2 are fixedly connected by a high-locking bolt assembly, thereby fixing hinge 1 and cover 2.

[0037] To prevent the bolt 6 from causing wear on the hinge hole 11 of the hinge 1 and the hinge holes on the two lugs 31 of the support 3, this embodiment installs bushings 7 inside the hinge hole 11 of the hinge 1 and inside the hinge holes of the two lugs 31 of the support 3. The hinge hole 11 of the hinge 1 and the hinge hole on the support 3 have the same diameter. Figure 4 As shown, bushing 7 is a stepped bushing with an outer diameter. Its inner diameter matches the outer diameter of bolt 6, ensuring that bolt 6 can be inserted into bushing 7. Its outer diameter has a large diameter section and a small diameter section to form an outer diameter step. A bushing 7 is installed in the hinge holes of the two lugs 31 of support 3. During installation, the large diameter section of bushing 7 is located inside lug 31, and the outer diameter of the small diameter section of bushing 7 is interference-fitted with the hinge hole on lug 31. Two bushings 7 are press-fitted into the hinge hole 11 of hinge 1, with the two bushings 7 facing each other, so that the small diameter section of the bushing is pressed into the hinge hole 11, and the large diameter section of the bushing is outside the hinge hole 11. When bushing 7 wears, only bushing 7 needs to be replaced; there is no need to replace hinge 1 and support 3, thus improving the service life of hinge 1 and support 3.

[0038] like Figure 2 , Figure 3 As shown, when the cover 2 is opened, the cover 2 flips outwards from the body 5 via the hinge 1 and bolt 6. A first through groove 52 is provided on the body 5 corresponding to the rotation area of ​​the hinge 1. The first through groove 52 is used to prevent the hinge 1 from interfering with the body 5 when it flips. When the cover 2 is closed, in order to limit the hinge 1 from flipping inwards from the body 5, a top plate 33 is provided on the top of the two lugs 31 of the support 3. The top plate 33 connects the two lugs 31. When the hinge 1 flips inwards from the body 5, the top plate 33 will limit the hinge 1 from over-flipping.

[0039] like Figure 1 , Figure 6 As shown in the figure, in this embodiment, an annular frame 4 is fixed inside the cover hole 51 of the body 5. The outer edge of the frame 4 is fixedly connected to the inner wall of the body 5 by fasteners, and the inner edge of the frame 4 overlaps with the inner wall edge of the cover 2. The frame 4 is provided with a second strip-shaped through groove 41, which communicates with the first strip-shaped through groove 52 and has the same width. It is also adapted to the thickness of the hinge 1 and is used to avoid the hinge 1 without affecting the flipping angle of the hinge 1. When the cover 2 is in the closed state, the hinge 1 is blocked in the second strip-shaped through groove 41 and the first strip-shaped through groove 52, which plays a certain sealing role for the two strip-shaped through grooves. The frame 4 is used to reinforce the periphery of the cover hole 51 of the body 5 and also serves to overlap the cover 2. There is a seam of about 2mm between the body 5 and the cover 2. A rubber sealing gasket 10 is provided between the contact surfaces of the mouth frame 4 and the cover 2. The rubber sealing gasket 10 is fixedly bonded to the mouth frame 4, which plays a buffering and wear-resistant role when the cover 2 is closed.

[0040] Two cover locks 9 are installed side-by-side on the inner wall of the cover 2 at the end away from the hinge 1. The cover locks 9 are used to lock the cover 2 to the body 5. In this embodiment, the cover lock 9 is a push-button spring-loaded latch lock, using aerospace industry standard parts, model HB2-71. Its unlocking switch 91 is located on the outer wall of the cover 2; unlocking is achieved by pressing the switch 91. Figure 1 As shown, when locked, the latch 92 of the cover lock 9 rests on the inner wall of the frame 4.

[0041] Specific working principle:

[0042] When opening the cover 2, press the Push button (switch 91) of the cover lock 9 to unlock the cover 2. The cover 2 and hinge 1 will then rotate outward around the bolt 6 to open the cover 2. When closing the cover 2, rotate the cover 2 towards the machine body 5 until the cover lock 9 automatically locks.

[0043] This utility model features a hinged cover structure that allows for flexible opening and closing without the need for tools. The cover does not occupy internal space during opening and is suitable for use in areas with limited internal opening space.

[0044] When disassembling the hinge structure of the cover, remove the connection between the connecting support 3 and the hinge 1. First, remove the nut 8, then remove the bolt 6 to separate the support 3 from the hinge 1. Next, remove the fixing plate 12 connecting the hinge 1 and the high-locking bolt assembly of the cover 2. Finally, remove the high-locking bolt assembly connecting the support 3 and the body 5 to complete the disassembly.

[0045] When installing the hinge structure of the cover, first fix the fixing plate 12 of the hinge 1 to the cover 2, then fix the mounting part 32 of the support 3 to the body 5, then align the hinge hole 11 of the hinge 1 with the hinge hole of the double lug of the support 3, insert the bolt 6, then put the nut 8 on the bolt 6 and tighten it to complete the installation.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lid hinge structure, characterized in that, include: The cover fits onto the cover hole of the machine body and is used to open the machine body for internal maintenance. The support is fixed to the inner wall of the machine body and is located on one side of the cover hole of the machine body; The hinge has one end hinged to the support and the other end fixed to the inner wall of the cover. The hinge is used to drive the cover to rotate outward around its hinge axis. And the cover lock, which is installed on the inner wall of the cover away from the hinge joint, and the cover lock is used to lock the cover to the body; The machine body has a first through groove corresponding to the hinge rotation area. The first through groove is used to prevent the hinge from interfering with the machine body when it flips.

2. The lid hinge structure according to claim 1, characterized in that, The support is a double-ear support, which includes two parallel ears. The bottom of each ear is provided with an outward-folding mounting part, which is used to fix and connect with the machine body. A hinge shaft is vertically inserted on the two parallel ears, which is used to hinge with one end of the hinge. The top of the two ears is connected by a top plate, which is used to limit the hinge when it flips into the machine body.

3. The lid hinge structure according to claim 1, characterized in that, One end of the hinge is a single-ear structure with a hinge hole. The hinge hole end is inserted between the two ears of the support, and the hinge shaft is simultaneously inserted into the hinge hole of the hinge. The other end of the hinge is provided with a fixing plate, which is fixedly connected to the inner wall of the cover.

4. The lid hinge structure according to claim 1, characterized in that, Bushings are installed in the holes on the two lugs of the support for mounting the hinge shaft, and bushings are installed in the hinge hole of the hinge. The bushings serve to reduce friction.

5. The lid hinge structure according to claim 1, characterized in that, The hinge shaft is made of bolts, and one end of the bolt is locked by a nut to prevent it from coming loose.

6. The lid hinge structure according to claim 1, characterized in that, An annular frame is fixed inside the cover hole of the machine body. The outer edge of the frame is fixedly connected to the inner wall of the machine body, and the inner edge of the frame overlaps with the inner wall edge of the cover. A second through groove is provided on the frame. The second through groove communicates with the first through groove and has the same width. The frame is used to reinforce the periphery of the cover hole of the machine body and to overlap the cover.

7. The lid hinge structure according to claim 1, characterized in that, The cover lock is a push-button spring latch lock. Its unlocking switch is located on the outer wall of the cover, and the lock is unlocked by pressing the switch. When locked, the latch of the cover lock rests on the inner wall of the cover frame.

8. The lid hinge structure according to claim 1, characterized in that, A rubber sealing gasket is bonded between the contact surfaces of the mouth frame and the mouth cover. The rubber sealing gasket serves to cushion and resist wear.

9. The lid hinge structure according to claim 1, characterized in that, The support is provided in two rows, and each has a corresponding hinge.

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