Aviation motor box direct insertion type circuit board dismounting tool

Abstract

The utility model provides a disassembling and assembling tool for a direct insertion type circuit board of an avionics machine box. The frame is of a symmetrical gantry structure and comprises a cross beam and two supporting legs, and the supporting legs abut against the circuit board case. The driving assembly comprises hand wheels symmetrically connected to the middle of the cross beam, a threaded rod and a balance rod, the threaded rod vertically penetrates through the cross beam, the hand wheels and the balance rod are connected to the two ends of the threaded rod, and the hand wheels are in threaded connection with the threaded rod and are vertically limited by the frame. The two groups of symmetrical force application assemblies comprise dowel bars, connecting rods and actuating rods, the dowel bars are hinged between the balancing rods and the connecting rods, the connecting rods are connected between the dowel bars and the supporting legs of the frame, and the two ends of the actuating rods are connected with the connecting rods and the circuit board dismounting holes respectively. According to the utility model, the hand wheel for applying torque through threaded connection and the symmetrical lever structure are adopted, so that the balance and stable application of the acting force for disassembling and assembling the circuit board are realized, the damage and deformation during the disassembling and assembling of the direct insertion type circuit board are reduced, and the circuit board can be ensured to be installed in place.

Description

Technical Field

[0001] This utility model belongs to the field of circuit board disassembly and assembly technology, specifically relating to a tool for disassembling and assembling a direct-insertion circuit board for an aircraft engine box. Background Technology

[0002] Avionics plays a vital role in the aviation industry, directly impacting flight safety. The avionics enclosures mostly utilize through-hole circuit boards, which frequently need to be removed and reinstalled during aircraft overhauls, maintenance, and system upgrades. Given the dense distribution, large number, and stringent protection requirements of the circuit boards within the avionics enclosures, the flexibility, convenience, and safety of the disassembly tools are extremely important.

[0003] The structural integrity of through-hole circuit boards within the avionics equipment chassis is crucial for the functionality and reliability of the equipment. These boards are securely attached to the chassis via bottom sockets. For ease of disassembly, the upper sides of the board typically feature disassembly holes with varying spacing. Currently, disassembly tools for through-hole circuit boards are primarily modular, using two symmetrical pry bars. These tools, with the chassis end face as a fulcrum and the disassembly holes on the board as the point of force, are used to pry the board apart. Reassembly is usually done by hand, without tools. However, due to the densely packed components on the circuit board, using modular disassembly tools can easily cause damage and deformation due to uneven force application, leading to open solder joints and ultimately damaging the board. Furthermore, direct hand application during installation can result in improper board placement. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of easy damage, deformation and improper installation of the circuit board in the disassembly and assembly of the direct-insertion circuit board of the aircraft engine box in the existing technology, and to provide a tool for disassembling and assembling the direct-insertion circuit board of the aircraft engine box.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A tool for removing and installing a direct-insertion circuit board for an aircraft engine chassis includes a frame, a drive assembly, and two sets of force-applying components symmetrically connected to both ends of the frame and the drive assembly.

[0007] The frame is used to support the drive components and force application components. It has a symmetrical gantry structure and includes a crossbeam and two legs. The two legs are used to abut against the chassis of the circuit board at both ends of the circuit board to be disassembled.

[0008] The drive assembly is used to drive the force application assembly, including a handwheel, a threaded rod, and a balance bar symmetrically connected at the middle of the crossbeam of the frame. The threaded rod passes vertically through the crossbeam, and the handwheel and balance bar are respectively connected to the two ends of the threaded rod. The handwheel is threadedly connected to the threaded rod and is limited by the frame in the vertical direction so that when the handwheel is rotated, it can drive the threaded rod and the balance bar to move up and down relative to the frame.

[0009] The force-applying components are used to apply force to the circuit board to be disassembled or assembled. Each force-applying component includes a force-transmitting rod, a connecting rod, and an actuating rod. The force-transmitting rod is connected between the balance rod and the connecting rod and is hinged at both ends. The connecting rod is connected between the force-transmitting rod and the support leg of the frame and is hinged to the frame. The connecting rod is closer to the circuit board to be disassembled or assembled than the balance rod. One end of the actuating rod is connected to the connecting rod, and the other end is connected to the disassembly hole on the circuit board to be disassembled or assembled. Thus, when the balance rod moves up and down, the force-transmitting rod and the connecting rod rotate, thereby driving the actuating rod to apply a balanced vertical force to the circuit board, thereby disassembling or assembling the circuit board.

[0010] Furthermore, the connecting rod is provided with multiple adjustment holes, and the actuating rod is connected to the connecting rod through one of the adjustment holes.

[0011] Furthermore, the plurality of adjustment holes are waist-shaped holes with a wavy structure.

[0012] Furthermore, a groove is provided in the middle of the crossbeam of the frame, and a boss is provided on the handwheel. The boss is inserted into the groove to limit the handwheel vertically.

[0013] Furthermore, the end of the threaded rod that connects to the balance bar has a double-ear structure with a through hole.

[0014] Furthermore, both ends of the force transmission rod are hinged to the balance bar and the connecting rod respectively via pins.

[0015] Furthermore, the end of the actuating rod used to connect to the circuit board to be disassembled is provided with a cylindrical protrusion for insertion into the disassembly hole of the circuit board.

[0016] Furthermore, the end of the actuating rod that connects to the connecting rod is machined with a threaded hole for connecting to the connecting rod by bolts.

[0017] Furthermore, the surface of the actuating rod is mirror-polished.

[0018] The advantages of this utility model are:

[0019] This utility model discloses a tool for disassembling and assembling a direct-insertion circuit board in an aircraft engine chassis. It includes a symmetrical gantry frame, a drive assembly symmetrically connected to the middle of the frame, and two sets of force-applying components symmetrically connected to both ends of the drive assembly. The two legs of the frame act as fulcrums of levers, abutting against the circuit board chassis. When the handwheel in the drive assembly is rotated, it drives a threaded rod and a balance rod to move up and down via a threaded connection. The balance rod then symmetrically drives a force transmission rod hinged to the balance rod and a connecting rod hinged to the frame in each of the two drive assemblies. The connecting rod then drives an action rod connected to the disassembly hole of the circuit board to be disassembled. Thus, the two action rods apply a balanced force to the circuit board, enabling stable disassembly and assembly. Therefore, this utility model, through a handwheel with a threaded connection that applies torque and a symmetrical lever structure, achieves balanced and stable application of force during circuit board disassembly and assembly, reducing damage and deformation during direct-insertion circuit board disassembly and assembly, ensuring proper circuit board installation, and featuring a compact structure and high disassembly and assembly efficiency.

[0020] 2. In the circuit board disassembly and assembly tool, the connecting rod is equipped with multiple adjustment holes, which allows the spacing of the action rod to be adjusted in stages to adapt to different circuit board disassembly hole spacings. This makes it suitable for circuit boards with various hole spacings, thus improving the applicability of the tool. Attached Figure Description

[0021] The above and / or other features and advantages of the present invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0022] Figure 1 This is a perspective view of the aircraft engine box direct-insertion circuit board disassembly and assembly tool of this utility model in use;

[0023] Figure 2 This is a front view of the aircraft engine box direct-insertion circuit board disassembly and assembly tool of this utility model in use, showing the disassembly process of the circuit board;

[0024] Figure 3 This is an exploded perspective view of the aircraft engine box direct-insertion circuit board disassembly and assembly tool of this utility model;

[0025] Figure 4 This is a front view of the aircraft engine box direct-insertion circuit board disassembly and assembly tool of this utility model.

[0026] In the diagram: 1-Frame, 11-Crossbeam, 111-Groove, 12-Support leg; 2-Drive assembly, 21-Handwheel, 211-Boss, 22-Threaded rod, 23-Balance bar; 3-Force application assembly, 31-Force transmission rod, 32-Connecting rod, 321-Adjusting hole, 33-Action rod, 331-Protrusion, 4-Pin, 5-Bolt; 100-Circuit board to be disassembled; 101-Chassis. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0028] This utility model provides a tool for disassembling and installing a direct-insertion circuit board for an avionics enclosure. It is used to disassemble and install the direct-insertion circuit board of the avionics enclosure. It uses the lever principle to apply force evenly to both ends of the circuit board. It has the characteristics of compact structure, balanced force application, convenient use and strong versatility. It reduces the risk of damage and deformation and improper installation during circuit board disassembly, which is of great significance for improving the reliability of avionics equipment.

[0029] Reference Figures 1 to 4 The aircraft chassis direct-insertion circuit board disassembly and assembly tool, as an exemplary embodiment of this utility model, includes a frame 1, a drive assembly 2, and two sets of force-applying components 3 symmetrically connected to both ends of the frame 1 and the drive assembly 2. The frame 1 supports the drive assembly 2 and the force-applying components 3, and abuts against the chassis 101 of the circuit board 100 when it is to be disassembled or assembled, providing a lever fulcrum; the drive assembly 2 is connected to the frame 1 and is used to drive the force-applying components 3; the force-applying components 3 are connected to the frame 1 and the drive assembly 2 and are used to apply force to the circuit board 100 to be disassembled or assembled, so as to disassemble or assemble the circuit board.

[0030] The frame 1 has a symmetrical gantry structure and includes a crossbeam 11 and two legs 12. It should be noted that the directional terms "horizontal" and "vertical" mentioned herein refer to directions parallel to the length and height of the circuit board, respectively, and are used only for structural description and not to limit the scope of this invention. The crossbeam 11 is used to mount the drive assembly 2. A groove 111 may be provided in the middle of the crossbeam 11 of the frame 1 to vertically limit the drive component, i.e., the handwheel 21, while mounting the drive assembly 2, which will be described in detail below. The two legs 12 are used to abut against the circuit board housing 101 at both ends of the circuit board 100 to be disassembled. The abutment points of the legs 12 may be machined with protrusions extending outward parallel to the upper surface of the housing to increase the contact area and enhance the stability of the lever fulcrum when force is applied. During the disassembly of the circuit board, the frame 1 can be held with one hand to fix the frame, thereby operating the drive assembly 2 to disassemble the circuit board.

[0031] The drive assembly 2 includes a handwheel 21, a threaded rod 22, and a balance bar 23. The handwheel 21 is symmetrically connected to the middle of the crossbeam 11 of the frame 1, and can apply torque to drive other components, thereby facilitating the assembly and disassembly of the circuit board. The handwheel 21 is specifically a rocker arm handwheel, which facilitates assembly and disassembly work. The threaded rod 22 passes vertically through the crossbeam 11. The handwheel 21 and balance bar 23 are respectively connected to the two ends of the threaded rod 22. The handwheel 21, acting as a lever, is located outside the gantry structure, while the balance bar 23 is located inside the gantry. The handwheel 21 is threadedly connected to the threaded rod 22, and the handwheel 21 is vertically limited by the frame 1, preventing vertical movement when rotated and only allowing the threaded rod 22 and balance bar 23 to move vertically relative to the frame 1. To facilitate the connection between the handwheel and the frame, the handwheel 21 is provided with a boss 211, which inserts into a groove 111 in the middle of the crossbeam 11 to vertically limit the handwheel 21. In addition, the end of the threaded rod 22 that is connected to the balance bar 23 is a double-ear structure with a through hole, and the double-ear end can be connected to the middle of the balance bar 23 by a pin, and the balance bar 23 is located in the space between the double ears.

[0032] Each force-applying component 3 includes a force transmission rod 31, a connecting rod 32, and an actuating rod 33. These components are all located inside the gantry of the frame 1. The force transmission rod 31 is connected between the balance bar 23 and the connecting rod 32, and its two ends are respectively hinged. Preferably, the two ends of the force transmission rod 31 are each hinged to the balance bar 23 and the connecting rod 32 via pins 4. The connecting rod 32 is connected between the force transmission rod 31 and the support leg 12 of the frame 1 and is hinged to the frame 1, especially via pins 4. The connecting rod 32 is closer to the circuit board to be disassembled than the balance bar 23. One end of the actuating rod 33 is connected to the connecting rod 32, and the other end is connected to the disassembly hole on the circuit board to be disassembled.

[0033] To enable the adjustable spacing of the actuating rod 33 to accommodate different circuit board disassembly hole spacings, making the disassembly tool suitable for circuit boards with various hole spacings and improving its applicability, in some embodiments, the connecting rod 32 is provided with multiple adjusting holes 321. The actuating rod 33 is connected to the connecting rod 32 through one of these adjusting holes. These adjusting holes can be arranged in a wavy, waist-shaped structure. Additionally, the end of the actuating rod 33 connected to the connecting rod 32 can be machined with a threaded hole for connection to the connecting rod 32 via a bolt 5. Specifically, the bolt 5 can pass through the adjusting hole 321 and be screwed into the threaded hole on the actuating rod. To facilitate the connection between the actuating rod and the circuit board, the end of the actuating rod 33 used to connect to the circuit board to be disassembled can be provided with a cylindrical protrusion 331 for insertion into the disassembly hole of the circuit board. To prevent the actuating rod from scratching the circuit board during use, the surface of the actuating rod 33 can be mirror-polished.

[0034] With this structure of the force-applying component 3, when the balance bar 23 moves up and down, the force transmission bar 31 and the connecting bar 32 are pulled or pushed by the balance bar to rotate, thereby driving the action bar 33 to apply a balanced vertical force to the circuit board, thereby disassembling and installing the circuit board.

[0035] The disassembly and assembly tool of this utility model can be coated with anti-static paint after assembly to avoid static electricity damage to the circuit board during use.

[0036] Now refer to Figure 2 The working process of the aircraft engine box direct-insertion circuit board disassembly and assembly tool provided by this utility model is described using the disassembly of the circuit board 100 to be disassembled as an example.

[0037] The circuit board disassembly and assembly tool of this utility model can move from the initial state shown by the solid line to the state shown by the dashed line during the disassembly of the circuit board. The frame 1 is always in contact with the upper surface of the chassis 101. Torque is applied by the handwheel 21. The upper surface of the chassis is the fulcrum for lever force application during disassembly. During disassembly, the disassembly holes on both sides of the circuit board are used as force points to pry the circuit board. In the initial state, the force transmission rod 31 is roughly vertical and the connecting rod 32 is roughly horizontal. When the handwheel 21 is rotated by applying torque, the threaded rod 22 and the balance rod 23 are driven to move upward. The balance rod 23 then pulls the force transmission rod 31 and the connecting rod 32 on both sides in turn. As shown by the dotted line, the force transmission rods 31 on both sides are symmetrically deflected from the vertical by a certain angle, and the connecting rod 32 is symmetrically deflected from the horizontal upward by a certain angle. This causes the action rods 33 connected to the connecting rod 32 on both sides to be pulled upward in a symmetrical and balanced manner, thereby stably pulling the circuit board 100 upward. This allows the circuit board to be smoothly moved out relative to the chassis 101, completing the reliable disassembly of the circuit board. Therefore, this tool achieves reliable disassembly of the circuit board with a simple and compact structure and is highly efficient.

[0038] Therefore, as described above, this utility model achieves balanced and stable application of the force for disassembling and assembling circuit boards through a handwheel that applies torque via a threaded connection and a symmetrical lever structure, reducing damage and deformation during the disassembly and assembly of through-hole circuit boards and ensuring that the circuit boards are installed in place. In addition, the circuit board disassembly and assembly tool of this utility model has a compact structure and high disassembly and assembly efficiency.

[0039] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. A tool for disassembling and assembling a direct-insertion circuit board in an aircraft engine chassis, characterized in that: It includes a frame, a drive assembly, and two sets of force-applying components symmetrically connected at both ends of the frame and the drive assembly; The frame is used to support the drive assembly and the force application assembly. It has a symmetrical gantry structure and includes a crossbeam and two legs. The two legs are used to abut against the chassis of the circuit board at both ends of the circuit board to be disassembled. The drive assembly is used to drive the force application assembly, including a handwheel, a threaded rod, and a balance bar symmetrically connected at the middle of the crossbeam of the frame. The threaded rod passes vertically through the crossbeam, and the handwheel and the balance bar are respectively connected to the two ends of the threaded rod. The handwheel is threadedly connected to the threaded rod and is limited by the frame in the vertical direction, so that when the handwheel is rotated, it can drive the threaded rod and the balance bar to move up and down relative to the frame. The force-applying components are used to apply force to the circuit board to be disassembled or assembled. Each force-applying component includes a force-transmitting rod, a connecting rod, and an actuating rod. The force-transmitting rod is connected between the balance rod and the connecting rod and its two ends are hinged. The connecting rod is connected between the force-transmitting rod and the support leg of the frame and is hinged to the frame. The connecting rod is closer to the circuit board to be disassembled or assembled than the balance rod. One end of the actuating rod is connected to the connecting rod, and the other end is connected to the disassembly hole on the circuit board to be disassembled or assembled. Thus, when the balance rod moves up and down, the force-transmitting rod and the connecting rod rotate, thereby driving the actuating rod to apply a balanced vertical force to the circuit board, thereby disassembling or assembling the circuit board.

2. The aircraft engine chassis direct-insertion circuit board disassembly and assembly tool according to claim 1, characterized in that: The connecting rod is provided with a plurality of adjustment holes, and the actuating rod is connected to the connecting rod through one of the adjustment holes.

3. The aircraft engine chassis direct-insertion circuit board disassembly and assembly tool according to claim 2, characterized in that: The multiple adjustment holes are waist-shaped holes with a wave-like structure.

4. The aircraft engine chassis through-hole circuit board disassembly and assembly tool according to claim 1 or 2, characterized in that: The frame has a groove in the middle of the crossbeam, and the handwheel has a boss that is inserted into the groove to vertically limit the handwheel.

5. The aircraft engine chassis through-hole circuit board disassembly and assembly tool according to claim 1 or 2, characterized in that: The end of the threaded rod that connects to the balance bar has a double-ear structure with a through hole.

6. The aircraft engine chassis through-hole circuit board disassembly and assembly tool according to claim 1 or 2, characterized in that: The two ends of the force transmission rod are each hinged to the balance bar and the connecting rod by pins.

7. The aircraft engine chassis through-hole circuit board disassembly and assembly tool according to claim 1 or 2, characterized in that: The end of the actuating rod that is used to connect to the circuit board to be disassembled or assembled is provided with a cylindrical protrusion for insertion into the disassembly hole of the circuit board.

8. The aircraft engine chassis through-hole circuit board disassembly and assembly tool according to claim 7, characterized in that: The end of the actuating rod that connects to the connecting rod is machined with a threaded hole for connecting to the connecting rod by bolts.

9. The aircraft engine chassis through-hole circuit board disassembly and assembly tool according to claim 7, characterized in that: The surface of the actuating rod is mirror-polished.

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