Aircraft door actuator fastener bushing removal device

Abstract

The utility model relates to the field of aviation repair, and specifically discloses a kind of aircraft cabin door transmission device fastening joint bushing dismounting device, including bolt, the outer end of bolt is equipped with guide nut with thread, and the outside of bolt is equipped with dismounting mould, dismounting mould includes disassembly mould and installation mould, and disassembly mould and installation mould are not simultaneously used with bolt cooperation.This application can conveniently and quickly dismount the bushing;And even the dismounting of bushing is realized smoothly, impact load is avoided to the damage of transmission device fastening joint and bushing, and the installation quality is guaranteed.The principle of the device is simple, easy to operate, and there is no safety hazard.

Description

Technical Field

[0001] This utility model relates to a bushing disassembly and assembly device, specifically to a bushing disassembly and assembly device for a fastening joint of an aircraft cabin door transmission device, belonging to the field of aviation repair technology. Background Technology

[0002] During the repair of aircraft landing gear doors, the bushings of the door drive mechanism fastening joints often wear or crack due to vibration and other loads during long-term service, necessitating replacement. A survey of bushing replacement practices in various aviation repair industries revealed that the current method involves using a rivet gun. However, this method has several drawbacks. First, the small contact area between the rivet gun and the bushing makes slippage easy, posing a safety hazard and potentially damaging the joint. Second, the direct contact between the rivet gun and the bushing results in concentrated and uneven stress distribution, with significant impact loads, further increasing the risk of damage during disassembly.

[0003] Therefore, there is an urgent need to design a device for disassembling and assembling the bushing of the fastening joint of the hatch transmission device, which can not only avoid damage to the bushing and fastening joint during disassembly and assembly, but also facilitate the quick and easy disassembly and assembly of the bushing. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a device for disassembling and assembling the fastening joint bushing of an aircraft cabin door transmission device.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A device for disassembling and assembling a fastening joint bushing of an aircraft cabin door transmission device includes a bolt, a guide nut being threaded onto one end of the bolt, and a disassembly and assembly mold being fitted onto the outside of the bolt. The disassembly and assembly mold includes a disassembly mold and an installation mold, which are not used in conjunction with the bolt at the same time.

[0007] Optionally, the disassembly mold includes a first push plate and a first abutting post. One end of the first abutting post is integrally connected to one end of the first push plate. The diameter of the first push plate is larger than the diameter of the first abutting post. The interior of the first push plate and the first abutting post is provided with through holes for bolt insertion along the length direction.

[0008] Optionally, the mounting mold includes a second push plate and a second abutment post. One end of the second abutment post is integrally connected to one end of the second push plate. The diameter of the second push plate is larger than the diameter of the second abutment post. The interior of the second push plate and the second abutment post are provided with through holes for bolt insertion along the length direction.

[0009] Optionally, the guide nut includes a limiting plate, a guide boss, and a nut. The guide boss and the nut are respectively fixedly connected to both ends of the limiting plate. The guide boss and the limiting plate are both provided with through holes for bolt insertion. The nut is provided with an internal threaded hole for bolt thread connection. The through holes and the internal threaded hole are coaxially arranged.

[0010] Optionally, when the bolt is used in conjunction with the disassembly mold, a pad for supporting the fastening joint is also installed on the outside of the bolt, and the pad is arranged in a "U" shape.

[0011] The beneficial effects of this utility model are:

[0012] The technical solution in this application allows for convenient and quick assembly and disassembly of the bushing; it also achieves uniform and stable assembly and disassembly of the bushing, avoiding damage to the fastening joints and bushing of the transmission device from impact loads, thus ensuring installation quality. Furthermore, the device is simple in principle, easy to operate, and poses no safety hazards.

[0013] It solves the problems of easy damage and unsafe operation during bushing disassembly and assembly, and is also applicable to similar coaxial opposing double bushing disassembly and assembly work. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the bushing disassembly structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the bushing installation structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the bolt structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the disassembly mold structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the mounting mold structure of this utility model.

[0020] Figure 6 This is a schematic diagram of the guide nut structure of this utility model.

[0021] Figure 7 This is a schematic diagram of the pad structure of this utility model.

[0022] Figure 8 This is a schematic diagram of the bushing structure of this utility model.

[0023] In the diagram: 1. Bolt; 2. Disassemble mold; 3. Install mold; 4. Guide nut; 5. Spacer; 6. Bushing; 7. Fastening joint; 8. Guide boss; 9. Limiting plate; 10. Nut; 11. Baffle; 12. Insert pipe. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Please see Figure 1-8 As shown, an aircraft door drive unit fastening joint bushing disassembly and assembly device includes a bolt 1, with a guide nut 4 threaded onto one external end of the bolt 1. A disassembly and assembly mold is fitted over the bolt 1, comprising a disassembly mold 2 and an installation mold 3. The disassembly mold 2 and the installation mold 3 are not used simultaneously with the bolt 1. When the bushing 6 is installed with the fastening joint 7 on the aircraft door drive unit, the installation mold 3 is used in conjunction with the bolt 1. When the bushing 6 is disassembled from the fastening joint 7 on the aircraft door drive unit, the disassembly mold 2 is used in conjunction with the bolt 1.

[0026] like Figure 1 and Figure 2 As shown, the interior of the fastening joint 7 is open, and mounting holes for installing the bushing 6 are provided through the middle of both side walls. The bushing 6 includes an annular baffle 11 and a connector 12 connected to one end of the baffle 11 and the connector 12, both of which have through holes inside. When installing the bushing 6 into the mounting holes, the bushing 6 is placed inside the fastening joint 7, and the connector 12 is inserted into the mounting hole as shown. Figure 2 As shown, the insertion and installation are performed inside the mounting hole on the positive side of the insertion tube 12, and the baffle 11 remains inside the fastening joint 7. Figure 1 As shown, there are baffles 11 on both sides of the inside of the fastening joint 7.

[0027] Specifically, the disassembly mold 2 includes a first push plate and a first abutting post. One end of the first abutting post is integrally connected to one end of the first push plate. The diameter of the first push plate is larger than the diameter of the first abutting post. Both the first push plate and the first abutting post have through holes along their length for bolt 1 insertion. The diameter of the first push plate is 0.1 mm smaller than the inner diameter of the mounting hole on the fastening connector 7. The first push plate can enter the mounting hole but cannot enter the insertion tube 12, and can abut against one end of the insertion tube 12, facilitating the subsequent outward pushing of the bushing 6. The diameter of the first abutting post is 0.1 mm smaller than the inner diameter of the through hole inside the insertion tube 12, making it less prone to wobbling inside the through hole. This allows the first push plate to abut and push the stable insertion tube 12 without easily causing wobbling during the pushing process.

[0028] When bushing 6 needs to be disassembled, insert the first abutment post at the end of the disassembly mold 2 into the mounting hole from the outside of the fastening joint 7 and into one end of the insertion tube 12. Then, pass the end of bolt 1 without the nut head through the disassembly mold 2 until it passes through the other side wall of the fastening joint 7 to the outside. Then, install the guide nut 4 on the end of bolt 1. The nut 10 is threadedly connected to bolt 1. During installation, the guide boss 8 faces the fastening joint 7. The guide boss 8 is inserted into the mounting hole to guide and limit the movement. After installation, as shown... Figure 1 As shown. Then, an open-end wrench is used to secure nut 10. A matching nut sleeve is installed on a pneumatic ratchet wrench, and one end of the nut sleeve is engaged with the nut head at the end of bolt 1. The pneumatic ratchet wrench then rotates the nut sleeve, which in turn rotates bolt 1. During rotation, bolt 1 moves from the fastening joint 7 side towards the guide nut 4 side. The nut head abuts against the first push plate at the end of the disassembly mold 2, causing the first push plate to abut against the end of the insertion tube 12. The first push plate moves inside the mounting hole, pushing the insertion tube 12 at the end of bushing 6 until the insertion tube 12 disengages from the mounting hole on the side wall of the fastening joint 7. The guide nut 4 is then removed from bolt 1. Bolt 1 and disassembly mold 2 are pulled out of the fastening joint 7, and the bushing 6, pushed out of the fastening joint 7, can be manually removed, completing the disassembly of one side of bushing 6. The disassembly process of the bushing 6 on the other side is the same as the above steps. The position of the disassembly mold 2 is changed to the side of the bushing 6 to be disassembled, and the position of the guide nut 4 is changed to the other side that has been disassembled for guidance. Then, the installation bolt 1 is turned to disassemble the bushing 6 on the remaining side.

[0029] Specifically, the mounting mold 3 includes a second push plate and a second abutment post. One end of the second abutment post is integrally connected to one end of the second push plate. The diameter of the second push plate is larger than the diameter of the second abutment post. Through holes for bolt 1 insertion are formed throughout the interior of both the second push plate and the second abutment post along their length. The diameter of the second push plate is larger than the diameter of the end baffle 11 of the bushing 6, and the diameter of the second abutment post is 0.1 mm smaller than the inner diameter of the through hole inside the baffle 11. This ensures that the second abutment post is not prone to wobbling after being inserted into the through hole, allowing the second push plate to stably push the baffle 11.

[0030] Insert the second abutment post at one end of the mounting mold 3 into the bushing 6 to be installed. Insertion is made from the end of the baffle 11, so that the second push plate abuts against the end of the baffle 11. Then, place the bushing 6 along with the mounting mold 3 into the fastening joint 7, with the insertion tube 12 facing the mounting hole to be installed. Next, insert the bolt 1 (without the nut head) into the fastening joint 7 from the side away from the insertion tube 12. One end of the bolt 1 passes through the mounting mold 3 and the bushing 6 to be installed, finally passing through the mounting hole of the bushing 6 to the outside to be installed with the guide nut 4. When installing the guide nut 4, the guide boss 8 faces the fastening joint 7 and is inserted into the mounting hole for guiding and limiting. After installation... Figure 2 As shown. Then, use an open-end wrench to fix nut 10. Install a matching nut sleeve on a pneumatic ratchet wrench, and attach one end of the nut sleeve to the nut head at the end of bolt 1. Then, use the pneumatic ratchet wrench to rotate the nut sleeve, which in turn rotates bolt 1. Bolt 1 moves towards the guide nut 4. During this movement, the nut head pushes the second push plate of the mounting mold 3, thereby moving the bushing 6 to be installed. Finally, the insertion tube 12 at the end of the bushing 6 to be installed is pushed into the interior of the mounting hole, and the baffle 11 abuts against the outer wall of the mounting hole. Then, remove the guide nut 4 from bolt 1, pull bolt 1 out of the fastening joint 7, and pull the mounting mold 3 out of the installed bushing 6. When the bushing 6 on the other side needs to be installed, follow the same steps: insert the mounting mold 3 into the bushing 6 to be installed, then place it into the fastening joint 7, insert bolt 1, install the guide nut 4, and tighten bolt 1 until the bushing 6 is installed. After the bushing 6 is installed, the bolt 1, guide nut 4 and installation mold 3 can be removed.

[0031] The nut sleeve can be inserted into the mounting hole to tighten the nut head at the end of bolt 1, thus facilitating the rapid tightening of bolt 1.

[0032] Specifically, the guide nut 4 includes a limiting plate 9, a guide boss 8, and a nut 10. The guide boss 8 and the nut 10 are fixedly connected to both ends of the limiting plate 9. Both the guide boss 8 and the limiting plate 9 have through holes for bolt 1 insertion. The nut 10 has an internal threaded hole for bolt 1 threaded connection. The through holes and the internal threaded hole are coaxial. The diameter of the guide boss 8 is 0.1mm smaller than the inner diameter of the mounting hole on the side wall of the fastening joint 7, allowing the guide boss 8 to be smoothly inserted into the mounting hole without easily wobbling. This ensures that the bolt 1 moves horizontally during tightening, serving as a guide and limiting element. The limiting plate 9 limits the position of the guide boss 8, preventing it from extending too far into the mounting hole and affecting the insertion tube 12 at the end of the bushing 6, thus affecting the normal installation of the bushing 6. The nut 10 facilitates the locking and fixing of the open-end wrench and also engages with the bolt 1 thread, allowing the bolt 1 to move horizontally after tightening.

[0033] Specifically, when bolt 1 is used in conjunction with disassembly mold 2, a pad 5 is also installed on the outside of bolt 1 to support the fastening joint 7. The pad 5 is U-shaped. When bushing 6 is disassembled, in order to prevent the fastening joint 7 from deforming due to thrust, the pad 5 can be snapped into the inside of the fastening joint 7. After snapping, as... Figure 1 As shown. When the pad 5 is snapped in, its open end remains horizontal as it is inserted into the fastening joint 7. The size of the pad 5 is adapted to the internal size of the fastening joint 7. When the fastening joint 7 is subjected to the pushing force of the disassembly mold 2, the pad 5 plays a role in resisting and reinforcing, and the side wall of the fastening joint 7 is not easily deformed.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for disassembling and assembling a fastening joint bushing of an aircraft cabin door transmission device, characterized in that, Includes a bolt (1), one end of which is threaded with a guide nut (4), and the bolt (1) is fitted with a disassembly and assembly mold, which includes a disassembly mold (2) and an installation mold (3). The disassembly mold (2) and the installation mold (3) are not used in conjunction with the bolt (1) at the same time. The disassembly mold (2) includes a first push plate and a first abutting post. One end of the first abutting post is integrally connected to one end of the first push plate. The diameter of the first push plate is larger than the diameter of the first abutting post. The interior of the first push plate and the first abutting post is provided with through holes for bolt (1) insertion along the length direction. The installation mold (3) includes a second push plate and a second abutting post. One end of the second abutting post is integrally connected to one end of the second push plate. The diameter of the second push plate is larger than the diameter of the second abutting post. The interior of the second push plate and the second abutting post is provided with through holes for bolt (1) insertion along the length direction.

2. The aircraft cabin door transmission device fastening joint bushing disassembly and assembly device according to claim 1, characterized in that, The guide nut (4) includes a limiting plate (9), a guide boss (8) and a nut (10). The guide boss (8) and the nut (10) are fixedly connected to both ends of the limiting plate (9). The guide boss (8) and the limiting plate (9) are both provided with through holes for bolt (1) insertion. The nut (10) is provided with an internal thread hole for bolt (1) thread connection. The through holes and the internal thread hole are coaxially arranged.

3. The device for disassembling and assembling a fastening joint bushing of an aircraft door transmission device according to claim 1, characterized in that, When the bolt (1) is used in conjunction with the disassembly mold (2), a pad (5) for supporting the fastening joint (7) is also installed on the outside of the bolt (1). The pad (5) is arranged in a "U" shape.

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