Dismounting device for aircraft fuel filter

Abstract

The utility model discloses a dismounting device for an aircraft fuel filter, which relates to the technical field of aircraft maintenance tools, and comprises a guide rod, a sliding weight block, an elastic piece, a connecting piece and a hook piece, one end of the guide rod is provided with a first limiting block, and the other end of the guide rod is connected with a second limiting block; the sliding weight block is arranged between the first limiting block and the second limiting block and can slide relative to the guide rod; the elastic piece is arranged on the guide rod in a sleeving mode and arranged between the sliding weight block and the second limiting block. The connecting piece is detachably connected to the guide rod and arranged on the side, away from the first limiting block, of the second limiting block. The hook piece is detachably connected to the connecting piece and used for hooking a handle of the fuel filter. According to the dismounting device, through mutual cooperation of the guide rod, the sliding weight block and the hook piece, the sliding weight block impacts the first limiting block, the fuel filter can be gradually withdrawn from the fuel hole, and thus dismounting of the fuel filter is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft maintenance tools, in particular to a device for disassembling an aircraft fuel filter end cover. Background Art

[0002] Currently, A-checks on 737NG series aircraft require fuel filter replacement or a fuel filter cover borehole inspection. However, during post-flight inspections, the fuel filter seal expands due to heat, making it difficult to remove because the engine temperature has not yet returned to normal.

[0003] Existing maintenance work cards do not provide relevant disassembly devices, resulting in maintenance personnel often having to rely on manual labor to disassemble during the inspection process. This not only requires a lot of effort from the maintenance personnel, but also, due to the special installation angle of the fuel filter on the engine, if the maintenance personnel use improper force, it is easy to cause personal injury and damage to the end cover of the fuel filter, posing certain safety hazards. Utility Model Content

[0004] The purpose of the utility model is to provide a disassembly device for an aircraft fuel filter, which utilizes the inertial impact force of a sliding hammer to disassemble the fuel filter, making it easy to disassemble the fuel filter, thereby solving the problem of difficult disassembly of the fuel filter during post-flight maintenance work on existing 737NG series aircraft.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A disassembly device for an aircraft fuel filter, comprising:

[0007] A guide rod, wherein one end of the guide rod along the length direction is provided with a first limit block, and the other end is connected to a second limit block;

[0008] a sliding hammer block, the sliding hammer block being arranged between the first limiting block and the second limiting block, and the sliding hammer block being sleeved on the guide rod so as to enable the sliding hammer block to slide relative to the guide rod along the length direction of the guide rod;

[0009] an elastic member, the elastic member being sleeved on the guide rod and arranged between the sliding hammer block and the second limiting block;

[0010] a connecting member, the connecting member being detachably connected to the guide rod and arranged on a side of the second limiting block facing away from the first limiting block;

[0011] A hook member is detachably connected to the connecting member and is used for hooking the handle of the fuel filter.

[0012] In some embodiments, the hook member is covered with an elastic layer.

[0013] In some embodiments, the thickness of the elastic layer is not less than 2mm.

[0014] In some embodiments, the second limiting block is detachably connected to the guide rod.

[0015] In some embodiments, the end of the guide rod connected with the second limiting block is provided with a first external thread structure, and the second limiting block is provided with a first internal thread structure matched with the first external thread structure.

[0016] In some embodiments, the connecting member is a columnar structure, and along the length direction of the connecting member, the connecting member is provided with a first connecting hole and a second connecting hole, the first connecting hole is provided with a second internal thread structure matched with the first external thread structure, and the hook member extends into the second connecting hole to connect the hook member with the connecting member.

[0017] In some embodiments, the second connecting hole is provided with a third internal thread structure, and the end of the hook member towards the connecting member is provided with a second external thread structure matched with the third internal thread structure to connect and fix the hook member with the connecting member.

[0018] In some embodiments, the dismounting device further comprises:

[0019] A locking member is arranged on the hook member and close to the connecting member, and

[0020] The locking member is provided with a fourth internal thread structure matched with the second external thread structure to lock the hook member.

[0021] In some embodiments, the cross-sectional profile of the connecting member is polygonal.

[0022] In some embodiments, the elastic member is connected and fixed with the sliding hammer block, or the elastic member is connected and fixed with the second limiting block.

[0023] Compared with the prior art, the embodiment of the utility model discloses a kind of dismounting devices for aircraft fuel filter, and its beneficial effects are as follows:

[0024] The disassembly device, through the interaction of the guide rod, the sliding hammer, and the hook member, allows maintenance personnel to hook the disassembly device onto the handle of the fuel filter using the hook member. The sliding hammer then strikes the first stopper with the force transmitted via the guide rod and the hook member to the handle of the fuel filter, gradually withdrawing the fuel filter from the fuel port, thereby completing the removal of the fuel filter. Furthermore, an elastic member is provided between the second stopper and the sliding hammer to prevent the sliding hammer from directly striking the second stopper, which could cause the hook member to fall off, thus ensuring the safety of the disassembly device.

[0025] Moreover, the disassembly device covers the hook member with an elastic layer. The elastic layer can absorb part of the impact force during the disassembly process based on its own elasticity, thereby reducing the wear of the hook member on the handle of the fuel filter.

[0026] Moreover, by providing a detachable connecting piece, a hook piece and a second limit block, the disassembly device can replace the appropriate sliding hammer block and hook piece according to the specifications and dimensions of the disassembly object, thereby making the application range of the disassembly device wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the disassembly device in the embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the cooperation between the elastic layer and the hook member in the embodiment of the present utility model;

[0029] Figure 3 It is a schematic diagram of a connecting member in an embodiment of the present utility model;

[0030] Figure 4 It is a schematic diagram of the arrangement of the first connecting hole and the second connecting hole in an embodiment of the present utility model.

[0031] In the figure, 100, disassembly device; 1, guide rod; 2, sliding hammer block; 3, elastic member; 4, connecting member; 4a, first connecting hole; 4b, second connecting hole; 5, hook member; 6, first limit block; 7, second limit block; 8, elastic layer; 9, locking member. DETAILED DESCRIPTION

[0032] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] In the description of the present invention, it should be understood that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, it may be internal communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0036] Example

[0037] refer to Figure 1-4 A disassembly device 100 for an aircraft fuel filter according to an embodiment of the present invention includes a guide rod 1, a sliding hammer block 2, an elastic member 3, a connecting member 4 and a hook member 5, wherein a first limit block 6 is provided at one end of the guide rod 1 along the length direction, and a second limit block 7 is connected to the other end; the sliding hammer block 2 is arranged between the first limit block 6 and the second limit block 7, and the sliding hammer block 2 is sleeved on the guide rod 1 so that the sliding hammer block 2 can slide relative to the guide rod 1 along the length direction of the guide rod 1; the elastic member 3 is sleeved on the guide rod 1 and arranged between the sliding hammer block 2 and the second limit block 7; the connecting member 4 is detachably connected to the guide rod 1 and is arranged on the side of the second limit block 7 away from the first limit block 6; the hook member 5 is detachably connected to the connecting member 4, and the hook member 5 is used to hook the handle of the fuel filter.

[0038] It should be noted that the guide rod 1 is generally a straight rod structure, so that the maintenance worker can easily move the sliding hammer block 2 to slide relative to the guide rod 1.

[0039] The hook member 5 can be configured with a contoured design tailored to the fuel filter handle, allowing it to be hooked onto the handle. With the hook member 5 hooked onto the fuel filter handle, the repairer holds the guide rod 1 and moves the slider 2, causing it to strike the first stop 6. Because the second stop 7 is connected to the guide rod 1, the force exerted by the slider 2 striking the first stop 6 is transmitted through the guide member and hook member 5 to the fuel filter handle. This force, generated by the slider 2 striking the first stop 6, acts as a pulling force, pulling the fuel filter out.

[0040] In order to facilitate the maintenance worker to hold the guide rod 1, the guide rod 1 can be equipped with a handle, which is arranged at the end of the first limit block 6 away from the second limit block 7 for the maintenance worker to hold.

[0041] During the process of removing the fuel filter, the hook 5 will repeatedly hit the handle of the fuel filter, which may easily cause wear between the hook 5 and the handle of the fuel filter. Figure 2 As an example of this embodiment, the hook member 5 may be coated with an elastic layer 8. For example, the elastic layer 8 may be made of Teflon and wrapped around the outside of the hook member 5. This allows the elastic layer 8 to act as a buffer between the hook member 5 and the handle of the fuel filter, thereby preventing direct hard contact between the hook member 5 and the handle of the fuel filter.

[0042] To ensure that elastic layer 8 provides sufficient cushioning, it must have a certain thickness. For example, the thickness of elastic layer 8 should be no less than 2 mm. Of course, depending on the dimensions of hook member 5 and the fuel filter handle, the thickness of elastic layer 8 should also be appropriate to avoid compromising the connection between hook member 5 and the fuel filter handle. Generally speaking, the thickness of elastic layer 8 can be adjusted based on the dimensions of hook member 5 and the fuel filter handle. For example, the thickness of elastic layer 8 can be within a range of 2 to 5 mm, or 2 to 10 mm. Details will not be elaborated here.

[0043] Because the sliding hammer block 2 strikes the first stop block 6, it wears out the sliding hammer block 2, affecting the normal operation of the disassembly device 100. Therefore, after the disassembly device 100 reaches a certain period of use, the sliding hammer block 2 can be replaced to ensure normal operation of the disassembly device 100. As an example of this embodiment, the second stop block 7 is detachably connected to the guide rod 1. By removing the second stop block 7, the sliding hammer block 2 and the elastic member 3 can be removed from the guide rod 1, allowing the maintenance operator to replace the sliding hammer block 2 and the elastic member 3 according to their wear.

[0044] It should be noted that when the sliding hammer block 2 strikes the first limit block 6, if the impact of the sliding hammer block 2 is strong, the sliding hammer block 2 may move toward the second limit block 7 under the action of the reaction force, and then strike the second limit block 7. Therefore, the elastic member 3 is disposed between the sliding hammer block 2 and the second limit block 7 to prevent the sliding hammer block 2 from directly striking the second limit block 7, absorb and mitigate the impact of the sliding hammer block 2 on the second limit block 7, and prevent the sliding hammer block 2 from striking the second limit block 7, causing the second limit block 7 to loosen, causing the hook member 5 or the sliding hammer block 2 to fall off, thereby ensuring the safety of the disassembly device 100. In some examples, the elastic member 3 is a spring, and the elastic member 3 can be connected and fixed to the sliding hammer block 2, or the elastic member 3 can be connected and fixed to the second limit block 7, so that the elastic member 3 can be installed together with the sliding hammer block 2 or the second limit block 7, thereby simplifying the assembly process of the disassembly device 100.

[0045] There are various ways to detachably connect the second limit block 7 to the guide rod 1. For example, the second limit block 7 and the guide rod 1 can be connected and matched through a threaded structure. As an example of this embodiment, the end of the guide rod 1 connected to the second limit block 7 is provided with a first external thread structure (not shown in the figure), and the second limit block 7 is provided with a first internal thread structure (not shown in the figure) that matches the first external thread structure. Exemplarily, the second limit block 7 can use a nut structure to facilitate the second limit block 7 to be screwed on the end of the guide rod 1. It should be noted that the outer diameter of the second limit block 7 needs to be larger than the outer diameter of the guide rod 1 to ensure that the sliding hammer block 2 and the elastic member 3 will not fall off the guide rod 1 from the second limit block 7.

[0046] Of course, there are various ways to detachably connect the connecting member 4 and the guide rod 1. For example, the connecting member 4 and the guide rod 1 can be connected and matched through a threaded structure. Figure 3-4 As an example of this embodiment, the connecting member 4 is a columnar structure; along the length direction of the connecting member 4, a first connecting hole 4a and a second connecting hole 4b are provided in the connecting member 4, and a second internal thread structure (not shown in the figure) that matches the first external thread structure is provided in the first connecting hole 4a, and the hook member 5 extends into the second connecting hole 4b to connect the hook member 5 to the connecting member 4.

[0047] It should be noted that in order to ensure that the first external thread structure of the guide rod 1 can cooperate with the first internal thread structure and the second internal thread structure, the length of the first external thread structure should be greater than the length of the second limit block 7 to ensure that after the second limit block 7 is screwed into the guide rod 1, the first external thread structure still has sufficient length to cooperate with the second internal thread structure.

[0048] The connecting piece 4 and the guide rod 1 are connected and matched by a threaded structure, which can ensure that the connecting piece 4 is firmly connected to the guide rod 1. Of course, the cross-sectional profile of the connecting piece 4 can be polygonal, so that the maintenance person can use a tool such as a wrench to screw the connecting piece 4 on the guide rod 1, ensuring that the connecting piece 4 is tightly connected to the guide rod 1 and is not easy to loosen.

[0049] To ensure a secure connection between the hook member 5 and the connector 4, the hook member 5 and the connector 4 may also be connected and mated via a threaded structure. As an example of this embodiment, a third internal threaded structure (not shown) is provided within the second connecting hole 4b, and a second external threaded structure (not shown) is provided at the end of the hook member 5 facing the connector 4. The second external threaded structure cooperates with the third internal threaded structure to securely connect the hook member 5 to the connector 4.

[0050] It should be noted that the first connection hole 4a and the second connection hole 4b are two holes arranged along the length of the connecting member 4. Generally speaking, the first connection hole 4a and the second connection hole 4b are coaxially arranged and interconnected, which facilitates the processing and preparation of the connecting member 4. Of course, because the first connection hole 4a cooperates with the guide rod 1 and the second connection hole 4b cooperates with the hook member 5, the inner diameter of the first connection hole 4a is generally larger than the inner diameter of the second connection hole 4b, so that the maintenance personnel can easily distinguish the orientation of the connecting member 4.

[0051] In addition, a locking structure may be provided between the hook member 5 and the connecting member 4 to lock the hook member 5 in the connecting member 4 to ensure that the hook member 5 does not come loose during the disassembly process. Figure 1 As an example of this embodiment, the disassembly device 100 also includes a locking member 9, which is arranged on the hook member 5 and close to the connecting member 4, and a fourth internal thread structure (not shown in the figure) is provided in the locking member 9, and the fourth internal thread structure cooperates with the second external thread structure to lock the hook member 5.

[0052] Locking member 9 can be configured as a nut, allowing it to be screwed onto hook member 5 and attached to the end of connector 4. The fourth and third internal thread structures cooperate to securely lock hook member 5 within connector 4, ensuring that hook member 5 does not become loose from connector 4 during fuel filter removal.

[0053] It should be noted that in order to ensure that the second external thread structure of the hook member 5 can cooperate with the third internal thread structure and the fourth internal thread structure, the length of the second external thread structure should be greater than the length of the second connecting hole 4b, so as to ensure that after the hook member 5 is screwed into the second connecting hole 4b, the second external thread structure still has sufficient length to cooperate with the fourth internal thread structure.

[0054] In summary, the embodiment of the present invention provides a disassembly device 100 for an aircraft fuel filter. The disassembly device 100, through the cooperation of the guide rod 1, the sliding hammer block 2, and the hook member 5, enables maintenance personnel to hook the disassembly device 100 on the handle of the fuel filter using the hook member 5, and then use the sliding hammer block 2 to strike the first limit block 6. The force of the sliding hammer block 2 striking the first limit block 6 is transmitted to the handle of the fuel filter via the guide rod 1 and the hook member 5, and then the fuel filter is gradually withdrawn from the fuel hole, thereby completing the disassembly of the fuel filter. In addition, the disassembly device 100, by providing an elastic member 3 between the second limit block 7 and the sliding hammer block 2, can prevent the sliding hammer block 2 from directly striking the second limit block 7, thereby preventing the sliding hammer block 2 from striking the second limit block 7 and causing the hook member 5 to fall off, thereby ensuring the safety of the disassembly device 100.

[0055] Moreover, the disassembly device 100 of this embodiment covers the hook member 5 with an elastic layer 8. The elastic layer 8 can absorb part of the impact force during the disassembly process based on its own elasticity, thereby reducing the wear of the hook member 5 on the handle of the fuel filter.

[0056] Moreover, the disassembly device 100 of this embodiment is provided with a detachable connecting part 4, a hook part 5 and a second limit block 7, so that the disassembly device 100 can replace the appropriate sliding hammer block 2 and the hook part 5 according to the specifications and dimensions of the disassembly object, thereby making the application range of the disassembly device 100 wider.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A disassembly device for an aircraft fuel filter, characterized in that: include: A guide rod, wherein one end of the guide rod along the length direction is provided with a first limit block, and the other end is connected to a second limit block; a sliding hammer block, the sliding hammer block being arranged between the first limiting block and the second limiting block, and the sliding hammer block being sleeved on the guide rod so as to enable the sliding hammer block to slide relative to the guide rod along the length direction of the guide rod; an elastic member, the elastic member being sleeved on the guide rod and arranged between the sliding hammer block and the second limiting block; a connecting member, the connecting member being detachably connected to the guide rod and arranged on a side of the second limiting block facing away from the first limiting block; A hook member is detachably connected to the connecting member and is used for hooking the handle of the fuel filter.

2. The disassembly device according to claim 1, characterized in that: The hook member is covered with an elastic layer.

3. The disassembly device according to claim 2, characterized in that: The thickness of the elastic layer is not less than 2 mm.

4. The disassembly device according to claim 1, characterized in that: The second limiting block is detachably connected to the guide rod.

5. The disassembly device according to claim 4, characterized in that: The end portion of the guide rod connected to the second limiting block is provided with a first external thread structure, and the second limiting block is provided with a first internal thread structure that matches the first external thread structure.

6. The disassembly device according to claim 5, characterized in that: The connecting member is a columnar structure; along the length direction of the connecting member, a first connecting hole and a second connecting hole are provided in the connecting member, and a second internal thread structure that matches the first external thread structure is provided in the first connecting hole, and the hook member extends into the second connecting hole to connect the hook member to the connecting member.

7. The disassembly device according to claim 6, characterized in that: The cross-sectional profile of the connecting piece is polygonal.

8. The disassembly device according to claim 6, characterized in that: A third internal thread structure is provided in the second connecting hole, and a second external thread structure is provided at the end of the hook member facing the connecting member. The second external thread structure cooperates with the third internal thread structure to connect and fix the hook member to the connecting member.

9. The disassembly device according to claim 8, characterized in that: The disassembly device further comprises: A locking member is provided on the hook member and is close to the connecting member, and a fourth internal thread structure is provided in the locking member, and the fourth internal thread structure cooperates with the second external thread structure to lock the hook member.

10. The disassembly device according to claim 1, characterized in that: The elastic member is connected and fixed to the sliding hammer block, or the elastic member is connected and fixed to the second limiting block.

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