Aircraft fuel tank cover and connection structure thereof

Abstract

The present application relates to an aircraft fuel tank cover, and relates to the field of fuel tank structures, including a fuel tank cover, which includes a movable cover, a sealing cover, a connecting shaft and a manual rocker, wherein the connecting shaft passes through the movable cover and the sealing cover, the sealing cover is made of elastic material, the manual rocker is connected to one end of the connecting shaft close to the movable cover, and the sealing cover is set to an elliptical shape. The present application has the effect of improving the efficiency of users in loading and unloading the cover on the fuel tank.

Description

Technical Field

[0001] The present application relates to the field of fuel tank structures, and in particular to an aircraft fuel tank cover and a connection structure thereof. Background Art

[0002] During flight, an airplane needs fuel to provide energy to the engine. Before the airplane takes off, fuel needs to be injected into the airplane's fuel tank. The cover on the fuel tank needs to have better sealing performance. Due to the special flying environment of the airplane, the high-pressure resistance requirements for the fuel tank cover are relatively high.

[0003] The relevant aircraft fuel tank cap usually adopts a screw-on design, by providing a thread at the fuel tank opening and an internal thread on the cap, so that the cap can be connected to the fuel tank opening through the thread, thereby achieving the effect of sealing the fuel tank.

[0004] The above-mentioned related technical solutions have the following defects: the threaded cover is inconvenient to load and unload, and it takes a long time to load and unload during use. Utility Model Content

[0005] In order to improve the efficiency of users in installing and removing covers on fuel tanks, the present application provides an aircraft fuel tank cover and a connection structure thereof.

[0006] The present application provides an aircraft fuel tank cover adopting the following technical solution:

[0007] The invention discloses an aircraft fuel tank cover, comprising a fuel tank cover, wherein the fuel tank cover comprises a movable cover, a sealing cover, a connecting shaft and a manual rocker arm, wherein the connecting shaft passes through the movable cover and the sealing cover, the sealing cover is made of elastic material, the manual rocker arm is connected to one end of the connecting shaft close to the movable cover, and the sealing cover is arranged to be elliptical.

[0008] By adopting the above technical solution, by arranging a sealing cover and a movable cover on the connecting shaft, the user can hold the manual crank arm to extend the sealing cover into the tank body, and then pull the manual crank arm to make the sealing cover stuck at the fuel tank opening. The movable cover can slide on the connecting shaft, and by sliding the movable cover to abut against the sealing cover, the probability of fuel in the fuel tank flowing out from the connection between the connecting shaft and the sealing cover can be reduced. The user can make the elliptical sealing cover stuck at the fuel tank opening by rotating the connecting shaft, thereby improving the efficiency of loading and unloading the cover on the fuel tank.

[0009] Optionally, the movable cover and the sealing cover are slidably connected to the connecting shaft, a clamping block is fixedly connected to the end of the connecting shaft away from the manual rocker arm, a connecting hole is opened on the sealing cover, the connecting shaft is inserted into the connecting hole, and the clamping block is clamped with the connecting hole.

[0010] By adopting the above technical solution, the movable cover and the sealing cover are slidably connected to the connecting shaft. After the user inserts the fuel tank cover into the fuel tank, he can pull the manual rocker arm to make the clamping block clamped on the sealing cover, thereby making the sealing cover clamped on the connecting shaft. When the user rotates the manual rocker arm, the sealing cover can be rotated through the connecting shaft, thereby making the sealing cover clamped at the fuel tank opening. The connecting shaft and the sealing cover can be detachably arranged, and there is no need to use rubber to integrally mold the sealing cover and the connecting shaft. The user can choose to use hard plastic or metal parts to make the connecting shaft and the clamping block, thereby improving the tensile strength of the connecting shaft.

[0011] Optionally, a rotating shaft is provided between the manual rocker arm and the connecting shaft, and the manual rocker arm is rotatably connected to the connecting shaft via the rotating shaft. A clamping portion is provided on the manual rocker arm, and the clamping portion is used to abut against the movable cover and make the movable cover abut against the sealing cover.

[0012] By adopting the above technical solution, by rotating the manual rocker arm and connecting it to the connecting shaft, the user can rotate the manual rocker arm to make the clamping part on the manual rocker arm abut against the movable port cover, and then push the movable port cover to make the movable port cover abut against the sealing port cover, thereby reducing the probability of fuel in the fuel tank flowing out of the connecting hole.

[0013] Optionally, an air hole is provided on the sealing cover, the air hole is located on a side of the sealing cover close to the card block, and the air hole is communicated with the connecting hole.

[0014] By adopting the above technical solution, an air hole is opened on the sealing cover to connect the air hole with the connecting hole. When the fuel in the fuel tank is used up, the air pressure inside and outside the fuel tank is different, and it is difficult for the user to pull the fuel tank cap out from the fuel tank opening. By opening the air hole on the sealing cover, the air hole can connect the atmosphere on both sides of the fuel tank cap. After the user rotates the manual rocker to disconnect the movable cover from the sealing cover, the air hole and the connecting hole connect the atmosphere on both sides of the fuel tank cap, thereby facilitating the user to remove the fuel tank cap from the fuel tank.

[0015] Optionally, an air groove is provided on the connecting shaft, the air groove is provided along the length direction of the connecting shaft, and the upper and lower sides of the air groove are respectively located on both sides of the sealing cover.

[0016] By adopting the above technical solution, an air groove is opened on the connecting shaft, and the two ends of the air groove are respectively arranged on both sides of the sealing cover. When the user rotates the manual rocker arm to disengage the movable cover from the sealing cover, the atmospheric environment on both sides of the fuel tank cover can be quickly connected.

[0017] Optionally, a plurality of sealing strips are fixed on the movable cover, and the sealing strips are made of elastic material.

[0018] By adopting the above technical solution, by fixing the sealing strip on the movable cover, when the movable cover abuts against the sealing cover, the sealing strip is squeezed and deformed, thereby improving the sealing performance of the fuel tank cap and reducing the probability of fuel flowing out through the air holes.

[0019] The present application provides a connection structure for an aircraft fuel tank cover adopts the following technical solution:

[0020] A connecting structure of an aircraft fuel tank cover comprises a fuel tank cover, a fuel tank cover frame and a tank body. The fuel tank cover frame is fixed at an opening of the tank body, and the shape of the fuel tank cover corresponds to that of the fuel tank cover frame.

[0021] By adopting the above technical solution and providing a fuel tank opening frame at the opening of the tank body, the user can insert the fuel tank cap into the tank body, and then rotate the fuel tank cap to be flush with the fuel tank opening frame. At this time, rotating the connecting shaft can enable the sealing cap to be rotated into the fuel tank opening frame and engage with the fuel tank opening frame, thereby improving the efficiency of the user in connecting the fuel tank cap to the fuel tank opening frame.

[0022] A connecting structure for an aircraft fuel tank cover. An upper clamping ring is fixed on the fuel tank cover frame. The upper clamping ring is used to abut against the surface of the sealing cover.

[0023] By adopting the above technical solution, an upper clamping ring is arranged on the fuel tank opening frame so that the upper clamping ring can abut against the surface of the sealing cover on the side away from the tank body. When the aircraft is flying, the atmosphere is thin at high altitudes and the fuel tank cover is affected by air pressure. The upper clamping ring supports the fuel tank cover, thereby reducing the chance of the fuel tank cover slipping out of the fuel tank opening frame.

[0024] In summary, the beneficial technical effects of this application are:

[0025] 1. By arranging a sealing cover and a movable cover on the connecting shaft, the user can hold the manual rocker arm to extend the sealing cover into the tank body, and then pull the manual rocker arm to make the sealing cover stuck at the opening of the fuel tank. The movable cover can slide on the connecting shaft. By sliding the movable cover to abut against the sealing cover, the probability of fuel in the fuel tank flowing out from the connection between the connecting shaft and the sealing cover can be reduced. The user can make the elliptical sealing cover stuck at the opening of the fuel tank by rotating the connecting shaft, thereby improving the efficiency of loading and unloading the cover on the fuel tank;

[0026] 2. By opening an air hole on the sealing cover, the air hole is connected to the connecting hole. When the fuel in the fuel tank is used up, the air pressure inside and outside the fuel tank is different, and it is difficult for the user to pull the fuel tank cap out of the fuel tank opening. By opening an air hole on the sealing cover, the air hole can connect the atmosphere inside and outside the fuel tank cap. After the user rotates the manual rocker to disconnect the movable cover from the sealing cover, the air hole and the connecting hole are connected to the atmosphere on both sides of the fuel tank cap, so that the user can easily remove the fuel tank cap from the fuel tank;

[0027] 3. By arranging an upper clamping ring on the fuel tank opening frame, the upper clamping ring can abut against the surface of the sealing cover on the side away from the tank body. When the aircraft is flying, the atmosphere is thin at high altitudes and the fuel tank cover is affected by air pressure. The upper clamping ring supports the fuel tank cover and can reduce the chance of the fuel tank cover slipping out of the fuel tank opening frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the structure of the fuel tank cover of an embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the positions of the pores in an embodiment of the present application.

[0031] Figure 4 This is a schematic diagram of the structure of the connecting shaft of the embodiment of the present application. Figure 1 .

[0032] Figure 5 This is a schematic diagram of the structure of the connecting shaft of the embodiment of the present application. Figure 2 .

[0033] Figure 6 It is a schematic diagram of the structure of the sealing cover of an embodiment of the present application.

[0034] Figure 7 It is a schematic diagram of the structure of the fuel tank opening frame of an embodiment of the present application.

[0035] Figure numerals: 1. fuel tank cap; 11. movable cover; 111. sealing strip; 12. sealing cover; 121. connecting hole; 122. air hole; 13. connecting shaft; 131. clamping block; 132. sealing ring; 133. air groove; 14. manual rocker arm; 141. rotating shaft; 142. clamping part; 2. fuel tank opening frame; 21. upper clamping ring; 22. lower clamping piece; 3. box body. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings.

[0037] The present application embodiment discloses an aircraft fuel tank cover, referring to Figure 1 , including a fuel tank cap 1 and Figure 2The fuel tank cap 1 comprises a movable cover 11, a sealing cover 12, a connecting shaft 13 and a manual rocker 14. The connecting shaft 13 passes through the movable cover 11 and the sealing cover 12. Both the movable cover 11 and the sealing cover 12 are slidably connected to the connecting shaft 13. The manual rocker 14 is arranged on one end of the connecting shaft 13 close to the movable cover 11. The user holds the manual rocker 14 to rotate the connecting shaft 13 and rotate the movable cover 11 and the sealing cover 12. The sealing cover 12 is an elliptical structure. By clamping the sealing cover 12 on the elliptical fuel tank frame 2, the fuel tank cap 1 plays the role of sealing the fuel tank.

[0038] Reference Figure 2 ,and Figure 3 The sealing cover 12 is made of elastic rubber, a connecting hole 121 is provided at the center of the sealing cover 12, the connecting shaft 13 is inserted into the connecting hole 121, and an air hole 122 is provided on one side of the sealing cover 12 located inside the oil tank, and the air hole 122 is connected to the connecting hole 121. When the user screws the sealing cover 12, the air hole 122 connects the atmospheric pressure inside and outside the oil tank, thereby facilitating the installation and removal of the sealing cover 12 on the oil tank frame 2.

[0039] Reference Figure 3 , Figure 4 and Figure 5 The end of the connecting shaft 13 away from the manual rocker arm 14 is connected with a clamping block 131, which abuts against the end surface of the sealing cover 12, so that the sealing cover 12 and the movable cover 11 can be clamped on the connecting shaft 13. The cross-section of the connecting hole 121 is the same as the cross-section of the clamping block 131, and the cross-section of the clamping block 131 is a non-circular figure. The clamping block 131 can clamp the connecting shaft 13 and the sealing cover 12 by clamping at the end of the connecting hole 121. When the user rotates the connecting shaft 13, the sealing cover 12 rotates with the connecting shaft 13, so that the sealing cover 12 can be clamped in the oil tank frame 2.

[0040] Reference Figure 4 , Figure 5 and Figure 6 The connecting shaft 13 is provided with an air groove 133, which is provided along the length direction of the connecting shaft 13 and is a blind groove. The upper end and the lower end of the air groove 133 are respectively located on both sides of the sealing cover 12, and the atmosphere inside and outside the oil tank can be communicated through the air groove 133, the connecting hole 121 and the air hole 122.

[0041] Reference Figure 2The manual rocker arm 14 is provided with a rotating shaft 141, and the manual rocker arm 14 is rotatably connected to the connecting shaft 13 through the rotating shaft 141. The length direction of the rotating shaft 141 is perpendicular to the length direction of the connecting shaft 13. A clamping part 142 is provided on one side of the manual rocker arm 14, and the clamping part 142 is protrudingly arranged. When the user rotates the manual rocker arm 14, the clamping part 142 can abut against the movable cover 11, and then the movable cover 11 abuts against the sealing cover 12. The movable cover 11 has the effect of sealing the air groove 133 on the connecting shaft 13, so that the fuel tank cover 1 remains sealed on the fuel tank frame 2, and the probability of the fuel in the fuel tank flowing out through the air hole 122 is reduced.

[0042] Reference Figure 4 The connecting shaft 13 is sleeved with a sealing ring 132, which is a circular ring structure and is made of elastic material. The sealing ring 132 is arranged in the connecting hole 121 and abuts against the block 131. When the user rotates the manual rocker arm 14 to make the movable cover 11 abut against the sealing cover 12, the sealing cover 12 and the block 131 jointly squeeze the sealing ring 132, so that the sealing ring 132 can be deformed and block the air hole 122, thereby reducing the probability of fuel leakage from the air hole 122.

[0043] Reference Figure 5 Two sealing strips 111 are arranged on one side of the movable cover 11 close to the sealing cover 12. The sealing strips 111 are long strips of rubber. The length directions of the two sealing strips 111 overlap. The two sealing strips 111 are arranged on both sides of the connecting shaft 13. When the movable cover 11 abuts against the sealing cover 12, the sealing strips 111 abut against the sealing cover 12. The movable cover 11 and the sealing cover 12 jointly squeeze the sealing strips 111, so that the sealing strips 111 fill the gap between the movable cover 11 and the sealing cover 12, thereby improving the sealing performance of the fuel tank cover 1.

[0044] The implementation principle of the embodiment of the present application is as follows: by slidingly connecting the movable cover 11 and the sealing cover 12 on the connecting shaft 13, the user rotates the manual rocker arm 14 so that the clamping portion 142 on the manual rocker arm 14 abuts against the movable cover 11, thereby enabling the movable cover 11 to slide and abut against the sealing cover 12, thereby improving the sealing of the fuel tank cover 1 and reducing the probability of fuel flowing out of the connecting hole 121. By providing an air hole 122 on the sealing cover 12 and an air groove 133 on the connecting shaft 13, when the fuel in the fuel tank is exhausted, the atmospheric pressure inside and outside the fuel tank is different, and it is difficult to pull the fuel tank cover 1 out of the fuel tank frame 2. The user rotates the manual rocker arm 14 to enable the atmospheric pressure on both sides of the fuel tank cover 1 to be connected through the connecting hole 121, the air hole 122 and the air groove 133, thereby achieving the effect of facilitating the user to load and unload the fuel tank cover 1.

[0045] The present application embodiment discloses a connection structure of an aircraft fuel tank cover, referring to Figure 1 , including a fuel tank cover 1, a fuel tank opening frame 2 and a box body 3, the fuel tank opening frame 2 is fixed at the opening of the box body 3, and the fuel tank cover 1 and the fuel tank opening frame 2 are detachably connected.

[0046] Reference Figure 1 When installing the fuel tank cap 1 on the fuel tank opening frame 2, the user first inserts the fuel tank cap 1 into the tank body 3, then rotates the fuel tank cap 1 so that the fuel tank cap 1 is flush with the fuel tank opening frame 2, and finally rotates the fuel tank cap 1 so that the fuel tank cap 1 can be snapped onto the fuel tank opening frame 2.

[0047] Reference Figure 7 The fuel tank mouth frame 2 is fixedly connected with an upper clamping ring 21 and two lower clamping members 22. The upper clamping ring 21 is fixed on the side of the fuel tank mouth frame 2 away from the tank body 3, and the lower clamping members 22 are arranged on the side of the fuel tank mouth frame 2 close to the tank body 3. When the user installs the fuel tank cover 1 on the fuel tank mouth frame 2, the user first inserts the fuel tank cover 1 into the tank body 3, and then makes the fuel tank cover 1 flush with the lower clamping members 22 and rotates the fuel tank cover 1. In the process of rotating the fuel tank cover 1, the user pulls the manual rocker arm 14 so that the upper side of the fuel tank cover 1 can abut against the upper clamping ring 21. When the fuel tank cover 1 is rotated to be clamped with the fuel tank mouth frame 2, the lower clamping members 22 abut against the lower side of the fuel tank cover 1. When the aircraft is flying, the fuel in the tank body 3 abuts against the fuel tank cover 1, so that the fuel tank cover 1 is clamped on one side of the upper clamping ring 21, reducing the probability of the fuel tank cover 1 being disconnected from the fuel tank mouth frame 2.

[0048] The implementation principle of the embodiment of the present application is: by setting an upper clamping ring 21 on the fuel tank port frame 2, the user inserts the fuel tank cover 1 into the tank body 3 and then clamps the fuel tank cover 1 on the fuel tank port frame 2, so that the fuel tank port frame 2 and the fuel tank cover 1 remain clamped, and when the aircraft flies to a high altitude with lower air pressure, the probability of the fuel tank cover 1 slipping out of the fuel tank port frame 2 can be reduced.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An aircraft fuel tank cover, characterized in that: The fuel tank cover (1) comprises a movable cover (11), a sealing cover (12), a connecting shaft (13) and a manual rocker arm (14); the connecting shaft (13) passes through the movable cover (11) and the sealing cover (12); the sealing cover (12) is made of an elastic material; the manual rocker arm (14) is connected to one end of the connecting shaft (13) close to the movable cover (11); and the sealing cover (12) is arranged to be elliptical.

2. The aircraft fuel tank cover according to claim 1, characterized in that: The movable cover (11) and the sealing cover (12) are slidably connected to the connecting shaft (13); a clamping block (131) is fixedly connected to one end of the connecting shaft (13) away from the manual rocker arm (14); a connecting hole (121) is provided on the sealing cover (12); the connecting shaft (13) is inserted into the connecting hole (121), and the clamping block (131) is clamped to the connecting hole (121).

3. The aircraft fuel tank cover according to claim 2, characterized in that: A rotating shaft (141) is provided between the manual rocker arm (14) and the connecting shaft (13); the manual rocker arm (14) is rotatably connected to the connecting shaft (13) via the rotating shaft (141); a clamping portion (142) is provided on the manual rocker arm (14); the clamping portion (142) is used to abut against the movable cover (11) and to make the movable cover (11) abut against the sealing cover (12).

4. The aircraft fuel tank cover according to claim 3, characterized in that: The sealing cover (12) is provided with an air hole (122), the air hole (122) is located on a side of the sealing cover (12) close to the block (131), and the air hole (122) is communicated with the connecting hole (121).

5. The aircraft fuel tank cover according to claim 4, characterized in that: An air groove (133) is provided on the connecting shaft (13), the air groove (133) is provided along the length direction of the connecting shaft (13), and the upper and lower sides of the air groove (133) are respectively located on both sides of the sealing cover (12).

6. The aircraft fuel tank cover according to claim 5, characterized in that: A plurality of sealing strips (111) are fixed on the movable cover (11), and the sealing strips (111) are made of elastic material.

7. A connection structure for an aircraft fuel tank cover according to claim 1, characterized in that: The fuel tank cover (1) comprises a fuel tank opening frame (2) and a tank body (3); the fuel tank opening frame (2) is fixed at the opening of the tank body (3); and the shape of the fuel tank cover (1) corresponds to the shape of the fuel tank opening frame (2).

8. A connection structure for an aircraft fuel tank cover according to claim 7, characterized in that: An upper clamping ring (21) is fixed on the oil tank opening frame (2), and the upper clamping ring (21) is used to abut against the surface of the sealing opening cover (12).

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