Disassembling tool for end cover of screw spring of displacement sensing rod of servo controller of aileron

Abstract

The application relates to the technical field of aviation maintenance, and provides a dismounting tool for a displacement sensing rod helical compression spring end cover of aileron servo controllers, which comprises a displacement nut, the displacement nut is provided with an internal thread structure and a mounting counterbore, a spring compression sleeve is arranged in the mounting counterbore of the displacement nut, the spring compression sleeve is provided with a compression hook, the compression hook is used for penetrating through a dismounting opening on the compression spring end cover and being pressed on the helical compression spring, a polytetrafluoroethylene sliding interval pad is sleeved between the spring compression sleeve and a top gland, the sliding interval pad reduces friction force, so that the spring compression sleeve and the top gland can relatively freely rotate, and the top gland is sleeved on the spring compression sleeve and connected with the displacement nut, and the spring compression sleeve can freely rotate in the displacement nut. Through the cooperative matching of the displacement nut, the spring compression sleeve, the sliding interval pad and the top gland, controllable compression of the helical compression spring and convenient dismounting of the end cover are realized, and the problems of narrow operation space and large and uncontrollable spring force are overcome.

Description

Technical Field

[0001] This application relates to the field of aircraft maintenance technology, and more specifically, to a tool for disassembling and assembling the helical spring end cap of an aileron servo controller displacement sensing rod. Background Technology

[0002] Currently, the disassembly and assembly of the helical spring end cap of the LVDT displacement sensor rod in an aircraft aileron servo controller is generally done manually. This method has significant drawbacks. During disassembly, due to the small size and high preload of the helical spring, and the lack of a reliable fulcrum at the piston rod end, it is difficult for the operator to stably compress the spring to a sufficient stroke to detach the end cap using only hand strength. This makes disassembly extremely difficult, and installation is also subject to risks such as misalignment and sudden spring rebound. This not only demands excessive strength and skill from the operator, leading to low work efficiency, but also poses safety hazards such as tool slippage, component damage, and even personal injury. Furthermore, repeated improper force may damage the delicate displacement sensor rod assembly, affecting the measurement accuracy and reliability of the servo controller. Therefore, there is an urgent need for a specialized disassembly and assembly tool that can safely, labor-savingly, and efficiently complete the disassembly and assembly of this specific component to ensure maintenance quality, improve work efficiency, and eliminate safety risks. Utility Model Content

[0003] This application aims to at least solve the technical problem in the related art that, when disassembling and assembling the helical spring end cap of the displacement sensing rod of the aileron servo controller, the end cap is fitted on the top of the spring and extends a certain length, the spring force is large, and the spring volume is small. During disassembly and assembly, the end cap can only be disassembled and assembled by compressing the helical spring to a certain distance. Because the spring body is small and the elastic force is large, it is difficult to compress it to the required position by hand, and the piston rod end assembly is not fixed, making the disassembly work difficult.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a tool for disassembling and assembling the helical spring end cap of the displacement sensing rod of an aileron servo controller, comprising: a displacement nut having an internal thread structure for connecting with the external thread of the piston rod end; a spring compression sleeve disposed in the mounting countersunk hole of the displacement nut, the spring compression sleeve having a compression hook for passing through the disassembly and assembly opening on the spring end cap and pressing against the helical spring; a polytetrafluoroethylene (PTFE) sliding spacer being sleeved between the spring compression sleeve and the top cap to reduce friction and allow the two to rotate freely relative to each other; and a top cap being sleeved on the spring compression sleeve and connected to the displacement nut, for bearing the reaction force transmitted through the spring compression sleeve and the PTFE sliding spacer when the spring is compressed, the spring compression sleeve being able to rotate freely within the displacement nut.

[0005] This application provides a tool for disassembling and assembling the helical spring end cap of an aileron servo controller displacement sensing rod. This tool allows for quick disassembly of the end cap, utilizing a displacement nut, spring compression sleeve, sliding spacer, and top cap to achieve controllable compression of the helical spring and convenient disassembly / assembly of the end cap. In scenarios requiring controllable compression and precise alignment, the displacement nut is threaded to the piston rod end; rotating the displacement nut moves the entire tool precisely axially. The compression hook on the spring compression sleeve passes through the disassembly / assembly opening of the end cap and abuts against the end face of the helical spring. The PTFE sliding spacer allows the spring compression sleeve to rotate freely within the displacement nut, ensuring easy alignment of the compression hook with the opening on the end cap, facilitating compression. In scenarios requiring efficient disassembly / assembly and safe operation, the operator only needs to continuously rotate the displacement nut to drive the compression hook to stably compress the helical spring. Once the spring is compressed to a sufficient stroke and the end cap is fully relaxed, the end cap can be easily removed or installed by hand. This process transforms the originally difficult and dangerous manual force compression into a smooth and controllable mechanical action, fundamentally overcoming the challenges of limited operating space and uncontrollable spring force. The assembly and disassembly tool has a compact overall structure and simple operation, which not only greatly reduces the difficulty of operation and the skill requirements for personnel, but also ensures the safety, reliability, high quality, and high efficiency of the assembly and disassembly process, effectively avoiding damage to parts and personnel.

[0006] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0007] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional structural schematic diagram of the disassembly and assembly tool for the helical spring end cap of the aileron servo controller displacement sensing rod according to an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of the A-direction structure of the disassembly and assembly tool for the helical spring end cap of the displacement sensing rod of the aileron servo controller in the embodiment shown. Figure 3 This is a cross-sectional structural schematic diagram of the piston rod end assembly of the aileron servo controller according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure in one embodiment of the present application with the helical spring end cap of the displacement sensing rod of the aileron servo controller being disassembled. Figure 5 This is a schematic diagram of the structure in which the helical spring end cap of the displacement sensing rod of the aileron servo controller is installed in one embodiment of this application.

[0008] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: Tools for disassembling and assembling the helical spring end cap of the displacement sensing rod of the 100 aileron servo controller; 110 displacement nut; 112 mounting countersunk hole; 120 spring compression sleeve; 122 compression hook; 124 base; 130 PTFE sliding spacer; 140 top cover; 150 screw; 200 aileron servo controller piston rod end assembly; 210 piston rod end; 220 spring end cap; 230 disassembly and assembly opening; 240 helical spring; 250 displacement sensing rod; 260 displacement sensing rod adjusting nut. Detailed Implementation

[0009] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0010] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0011] The following reference Figures 1 to 5 This application describes a tool 100 for disassembling and assembling the helical spring end cap of the aileron servo controller displacement sensing rod according to some embodiments of the present application.

[0012] like Figures 1 to 5 As shown, Figure 1 This is a cross-sectional structural schematic diagram of the disassembly and assembly tool 100 for the helical spring end cap of the aileron servo controller displacement sensing rod according to an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of the A-direction structure of the tool 100 for disassembling and assembling the helical spring end cap of the displacement sensing rod of the aileron servo controller in the embodiment shown. Figure 3 This is a cross-sectional structural schematic diagram of the piston rod end assembly 200 of the aileron servo controller according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure in one embodiment of the present application with the helical spring end cap of the displacement sensing rod of the aileron servo controller being disassembled. Figure 5 This is a schematic diagram of the structure in which the helical spring end cap of the displacement sensing rod of the aileron servo controller is installed in one embodiment of this application.

[0013] like Figure 1 , Figure 2 and Figure 3As shown, an embodiment of this application provides a disassembly and assembly tool 100 for the helical spring end cap of the displacement sensing rod of an aileron servo controller, comprising: a displacement nut 110, which has an internal thread structure for connecting with the external thread of the piston rod end 210; a spring compression sleeve 120, which is disposed in the mounting countersunk hole 112 of the displacement nut 110 and has a compression hook 122 for passing through the disassembly and assembly opening 230 on the spring end cap 220 and pressing against the helical spring 240; a polytetrafluoroethylene (PTFE) sliding spacer 130, which is sleeved on the spring compression sleeve 120; and a top cap 140, which is sleeved on the spring compression sleeve 120 and connected to the displacement nut 110, for receiving the reaction force transmitted through the spring compression sleeve 120 and the PTFE sliding spacer 130 when the spring is compressed, and the spring compression sleeve can rotate freely in the displacement nut.

[0014] like Figure 1 and Figure 2 As shown, the disassembly and assembly tool 100 for the helical spring end cap of the aileron servo controller displacement sensing rod provided in this application includes a displacement nut 110, a spring compression sleeve 120, a polytetrafluoroethylene (PTFE) sliding spacer 130, and a top cap 140. The displacement nut 110 has an internal thread structure for connection with the external thread of the piston rod end 210. The spring compression sleeve 120 is disposed within the mounting countersunk hole 112 of the displacement nut 110 and has a compression hook 122, which passes through the disassembly and assembly opening 230 on the spring end cap 220 and presses against the helical spring 240. The PTFE sliding spacer 130 is sleeved on the spring compression sleeve 120. The top cap 140 is sleeved on the spring compression sleeve 120 and connected to the displacement nut 110, serving to receive the reaction force transmitted through the spring compression sleeve 120 and the PTFE sliding spacer 130 when the spring is compressed. The spring compression sleeve can rotate freely within the displacement nut.

[0015] Specifically, such as Figure 3As shown, the aileron servo controller piston rod end assembly 200 includes a piston rod end 210, a compression spring end cap 220, a helical compression spring 240, a displacement sensing rod 250, and a displacement sensing rod adjusting nut 260. The displacement sensing rod 250 is connected to the top of the piston rod end 210. The compression spring end cap 220 and the helical compression spring 240 are sleeved on the piston rod end 210, with the compression spring end cap 220 pressing against the helical compression spring 240. The compression spring end cap 220 has a disassembly opening 230. The displacement sensing rod adjusting nut 260 is located inside the piston rod end 210 and is used to adjust the position of the displacement sensing rod 250. When disassembling or installing the spring end cap 220, first adjust the helical spring 240 to its maximum installation length by adjusting the displacement sensing rod adjusting nut 260. The displacement sensing rod 250 is then limited by the positioning pin. At this point, connect the disassembly / installation tool to the piston rod end 210 via the displacement nut 110. Rotate the displacement nut 110 so that the compression hook 122 of the spring compression sleeve 120 presses against the end face of the helical spring 240 through the disassembly / installation opening 230 on the spring end cap 220. Continue to rotate the displacement nut 110 downwards to compress the helical spring 240 to a certain length, then remove or install the spring end cap 220. Afterwards, rotate the displacement nut 110 upwards to allow the helical spring 240 and the spring end cap 220 to be in place. Remove the tool to complete the disassembly / installation. The disassembly / installation tool is convenient, easy to operate, safe and reliable, highly efficient, and can easily complete the disassembly / installation of the spring end cap 220.

[0016] In this way, the displacement nut 110, through its internal thread engaging with the external thread of the piston rod end 210, converts the operator's rotational action into precise linear feed of the entire tool; the compression hook 122 of the spring compression sleeve 120 utilizes the pre-set disassembly and assembly opening 230 on the spring end cap 220 as an action channel to directly and accurately transmit the downward pressure of the tool to the end face of the helical spring 240, achieving controllable compression of the helical spring 240; the PTFE sliding spacer 130, utilizing its low coefficient of friction, withstands the helical spring... While compressing the spring, the spring compression sleeve 120 is allowed to rotate freely within the displacement nut 110. This degree of rotational freedom ensures that the compression hook 122 can be easily aligned with the disassembly opening 230 on the end cap. The top cover 140, through its connection with the displacement nut 110, encapsulates and positions the spring compression sleeve 120 and the PTFE sliding spacer 130 within the displacement nut 110, forming an integral transmission structure. This ensures the coordinated work of all components and withstands the reaction force during spring compression. Through the coordinated action of the above components, convenient and reliable disassembly and assembly of the compression spring end cap 220 are achieved.

[0017] Compared with existing technologies, the disassembly and assembly tool 100 for the aileron servo controller displacement sensing rod helical spring end cap provided in this application has the following advantages: It replaces purely manual operation with a dedicated mechanical structure, greatly reducing the strength and skill requirements for operators, making the disassembly and assembly process labor-saving and convenient; the tool can precisely control the spring's compression stroke and centering position, effectively avoiding component damage caused by improper operation, such as scratching the displacement sensing rod or damaging the end cap plating, thus improving maintenance quality and safety; the entire disassembly and assembly process is standardized and efficient, significantly shortening maintenance time, improving work efficiency, and fundamentally eliminating safety hazards such as tool slippage and accidental spring ejection during manual operation, ensuring safe and reliable operation.

[0018] Specifically, currently, the disassembly and assembly of the helical spring end cap of the LVDT displacement sensing rod in an aircraft aileron servo controller is generally done manually. During disassembly, this method is extremely difficult because the helical spring is small, has a high preload, and lacks a reliable point of leverage at the piston rod end. Operators cannot reliably compress the spring to a sufficient stroke to detach the end cap using only their hand strength. This results in disassembly being extremely difficult, and installation is also subject to risks such as misalignment and sudden spring rebound. This not only demands excessive strength and skill from the operator, leading to low work efficiency, but also poses safety hazards such as tool slippage, component damage, and even personal injury.

[0019] To address the shortcomings of existing technologies, this application aims to provide a tool 100 for disassembling and assembling the helical spring end cap of an aileron servo controller displacement sensing rod. This tool allows for the quick disassembly of the helical spring end cap of the aileron servo controller displacement sensing rod. Through the coordinated operation of the displacement nut 110, spring compression sleeve 120, PTFE sliding spacer 130, and top cap 140, controllable compression of the helical spring 240 and convenient disassembly and assembly of the end cap are achieved. In controllable compression and precise alignment scenarios, the displacement nut 110 is threadedly connected to the piston rod end 210; rotating the displacement nut 110 moves the entire tool precisely axially. The compression hook 122 on the spring compression sleeve 120 passes through the disassembly and assembly opening 230 of the end cap and abuts against the end face of the helical spring 240. The PTFE sliding spacer 130 allows the spring compression sleeve 120 to rotate freely within the displacement nut 110, ensuring that the compression hook 122 easily aligns with the opening on the end cap, creating conditions for compression. In efficient disassembly and assembly and safe operation scenarios, operators only need to continuously rotate the displacement nut 110 to drive the compression hook 122 to stably press down the spiral spring 240. Once the spring is compressed to a sufficient stroke and the end cap is fully relaxed, the spring end cap 220 can be easily removed or installed by hand. This process transforms the originally difficult and dangerous manual force compression into a smooth and controllable mechanical action, fundamentally overcoming the problems of limited operating space and difficult-to-control spring force. The overall structure of the disassembly and assembly tool is compact and the operation process is simple, which not only greatly reduces the difficulty of operation and the skill requirements of personnel, but also ensures the safety, reliability and high efficiency of the disassembly and assembly process, effectively avoiding damage to parts and personnel.

[0020] In specific applications, the disassembly and assembly tool 100 for the helical spring end cap of the aileron servo controller displacement sensing rod is specifically a disassembly and assembly tool for the helical spring end cap of the aileron servo controller LVDT displacement sensing rod. The LVDT (Linear Variable Differential Transducer) mentioned in this article refers to a linear variable differential sensor, a type of sensor used to measure linear displacement, and the displacement sensing rod 250 is a component of the linear variable differential sensor LVDT.

[0021] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the mounting countersunk hole 112 of the displacement nut 110 is coaxially arranged with the internal thread structure of the displacement nut 110.

[0022] Specifically, such as Figure 1 and Figure 2As shown, the countersunk hole 112 serves as a cavity to accommodate the spring compression sleeve 120, and its axis coincides with the axis of the internal thread structure of the displacement nut 110. This coaxial design ensures that when the displacement nut 110 is screwed into the piston rod end 210, the spring compression sleeve 120 within the countersunk hole 112 automatically maintains coaxial alignment with the piston rod, allowing the compression hook 122 to accurately align with the disassembly opening 230 on the compression spring end cap 220 without additional adjustment steps. This coaxial structure ensures uniform force distribution when the tool transmits axial pressure, avoiding jamming or wear caused by eccentricity, thus making the entire compression process smooth and stable, improving the tool's operating accuracy and reliability.

[0023] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the spring compression sleeve 120 includes a base 124, which is installed in the mounting countersunk hole 112 of the displacement nut 110.

[0024] Specifically, such as Figure 1 As shown, the base 124 forms the radial flange of the spring compression sleeve 120, and its outer diameter is larger than the outer diameter of the rod portion of the spring compression sleeve 120. The outer diameter of the base 124 mates with the mounting countersunk hole 112 of the displacement nut 110. This design allows the axial force generated when the displacement nut 110 is rotated downwards to act on the base 124 through the top cap 140 and the PTFE sliding spacer 130, thereby pushing the entire spring compression sleeve 120 downwards and ensuring that the compression hook 122 can effectively compress the helical spring 240.

[0025] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the polytetrafluoroethylene sliding spacer 130 is disposed between the base 124 of the spring compression sleeve 120 and the top cover 140.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, the PTFE sliding spacer 130 is installed between the upper surface of the base 124 of the spring compression sleeve 120 and the inner end face of the top cap 140. PTFE has an extremely low coefficient of friction, allowing the base 124 of the spring compression sleeve 120 and the PTFE sliding spacer 130 to rotate freely and move slightly up and down within the mounting countersunk hole 112 of the displacement nut 110. This design allows the spring compression sleeve 120 to be axially fixed for stable pressure transmission while simultaneously releasing its rotational freedom in the circumferential direction. This ensures that the operator can easily rotate the spring compression sleeve 120, allowing the compression hook 122 to quickly and accurately align and pass through the disassembly opening 230 on the spring end cap 220, pressing the helical spring downwards in a straight line.

[0027] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the top cover 140 is connected to the displacement nut 110 by screws 150.

[0028] Specifically, such as Figure 1 and Figure 2 As shown, the top cap 140 is fixedly connected to the top of the displacement nut 110 by a plurality of screws 150 evenly distributed along its circumference. This screw 150 connection provides a stable and adjustable axial clamping force, ensuring that the top cap 140 reliably constrains the PTFE sliding spacer 130 and the base 124 of the spring compression sleeve 120 within the mounting countersunk hole 112 of the displacement nut 110, forming a compact assembly.

[0029] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the width of the compression hook 122 is smaller than the width of the disassembly opening 230 on the spring end cap 220.

[0030] Specifically, such as Figure 2 As shown, the radial width of the compression hook 122 is designed to be slightly smaller than the corresponding width of the disassembly opening 230 on the spring end cap 220. This dimensional relationship ensures that when the operator rotates the spring compression sleeve 120, the compression hook 122 can easily and without interference pass through the opening on the end cap, thereby smoothly reaching and abutting the end face of the helical spring 240.

[0031] In some embodiments, optionally, such as Figure 2 As shown, the spring compression sleeve 120 is rotatable relative to the displacement nut 110 so that the compression hook 122 is aligned with the disassembly opening 230.

[0032] Specifically, such as Figure 2 As shown, the spring compression sleeve 120 achieves axial support through the flat contact between its base 124 and the bottom of the countersunk hole 112 of the displacement nut 110. Simultaneously, the low-friction interface formed by the PTFE sliding spacer 130 and the top cap 140 allows it to rotate freely in the circumferential direction. When the operator needs to align the compression hook 122 with the disassembly opening 230 on the spring end cap 220, they only need to gently rotate the top of the spring compression sleeve 120 by hand to rotate the compression hook 122 around the tool axis until it is fully aligned with the opening. This rotational freedom design allows the operator to quickly complete the crucial alignment step by simply rotating the spring compression sleeve 120 without precisely adjusting the angle of the entire tool, greatly simplifying the operation process, improving disassembly and assembly efficiency, and avoiding damage to components that may be caused by forced insertion.

[0033] In some embodiments, optionally, such as Figure 4 and Figure 5 As shown, when the displacement nut 110 rotates, it drives the compression hook 122 to move up and down to release or compress the helical spring 240.

[0034] Specifically, such as Figure 4 and Figure 5 As shown, the displacement nut 110 converts its rotational motion into precise linear displacement along the piston rod axis by engaging with the external thread of the piston rod end 210. When the operator rotates the displacement nut 110 clockwise, its internal thread drives the entire tool to move downward along the piston rod. At this time, the spring compression sleeve 120 fixed inside the tool moves downward accordingly, and the compression hook 122 at its front end applies axial pressure to the helical compression spring 240, causing it to compress smoothly. Conversely, when the displacement nut 110 is rotated counterclockwise, the entire tool moves upward, and the compression hook 122 rises accordingly, gradually releasing the pressure on the helical compression spring 240, allowing it to return to its original position smoothly.

[0035] In some embodiments, optionally, the disassembly tool is used to disassemble the helical spring end cap of the LVDT displacement sensing rod in the aileron servo controller, the displacement sensing rod 250 being a component of the linear variable differential sensor LVDT.

[0036] Specifically, the structural dimensions and force characteristics of this disassembly and assembly tool are specifically designed to adapt to the special structure of the aileron servo controller piston rod end assembly 200. The LVDT (Linear Variable Differential Sensor) is a precision displacement sensor, and the installation accuracy of its sensing rod directly affects the feedback accuracy of the flight control system. The tool achieves reliable fixation through a threaded connection between the displacement nut 110 and the piston rod end 210. Its spring compression sleeve 120's compression hook 122 is specifically matched with the standardized disassembly and assembly opening 230 pre-reserved on the spring end cap 220, enabling precise and controllable compression of the helical spring 240 without touching the precision sensing rod. This targeted design ensures that the disassembly and assembly of the high-preload end cap is completed efficiently during the disassembly and assembly process, while effectively protecting valuable core sensing components. This achieves a high degree of unity between maintenance operations and component protection, making it particularly suitable for maintenance scenarios with high precision and high reliability requirements in aerospace applications.

[0037] In some embodiments, optionally, such as Figure 1 As shown, the PTFE sliding spacer 130 is made of PTFE material.

[0038] Specifically, polytetrafluoroethylene (PTFE) was chosen as the material for the sliding spacer because of its unique comprehensive properties. This material has the lowest coefficient of friction among known solid materials, giving it excellent self-lubricating properties. This ensures that the spring compression sleeve 120 can rotate flexibly with minimal resistance, which is the fundamental guarantee for achieving quick and easy alignment between the compression hook 122 and the end cap opening. At the same time, PTFE material has excellent resistance to compression creep and mechanical strength, enabling it to withstand the repeated pressure and impact transmitted from the helical spring 240 through the spring compression sleeve 120 over a long period, avoiding functional failure due to plastic deformation or wear.

[0039] In specific applications, such as Figure 4 and Figure 5 As shown, the steps for disassembling and installing the spring end cover 220 using the disassembly and assembly tool 100 for the displacement sensing rod helical spring end cover of the aileron servo controller provided in this application are as follows: When disassembling or installing the compression spring end cap 220, such as Figure 4 and Figure 5 As shown, first, adjust the helical compression spring 240 to its maximum installation length by adjusting the displacement sensing rod adjusting nut 260. At this time, the displacement sensing rod 250 is limited by the positioning pin. Then, connect the disassembly tool to the piston rod end 210 through the displacement nut 110. Rotate the displacement nut 110 so that the compression hook 122 of the spring compression sleeve 120 presses against the end face of the helical compression spring 240 through the disassembly opening 230 on the compression spring end cover 220. Continue to rotate the displacement nut 110 downwards to compress the helical compression spring 240 to a certain length, then remove or install the compression spring end cover 220. After that, rotate the displacement nut 110 upwards to put the helical compression spring 240 and the compression spring end cover 220 into place, and remove the tool to complete the disassembly and assembly. This disassembly and assembly tool is convenient to assemble and disassemble, simple to operate, safe and reliable in operation, high in quality and efficiency, and can easily complete the disassembly and assembly of the compression spring end cover 220.

[0040] Specifically, such as Figure 4 As shown, the steps for disassembling the helical spring end cap of the displacement sensing rod of the aileron servo controller are as follows: (1) Adjust the displacement sensing rod adjusting nut; (2) Connect the displacement nut; (3) Compress the helical spring; (4) Remove the spring end cap; (5) Disassembly complete.

[0041] Specifically, such as Figure 5 As shown, the installation steps for the helical spring end cap of the displacement sensing rod of the aileron servo controller are as follows: (1) Adjust the adjusting nut of the displacement sensing rod; (2) Connect the displacement nut; (3) Compress the helical spring; (4) Install the spring end cap; (5) Installation complete.

[0042] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tool for disassembling and assembling the helical spring end cap of the displacement sensing rod of an aileron servo controller, characterized in that, include: A displacement nut having an internal thread structure for connection with the external thread of the piston rod end; A spring compression sleeve is disposed in the mounting countersunk hole of the displacement nut. The spring compression sleeve has a compression hook for passing through the disassembly opening on the spring end cap and pressing against the helical spring. A polytetrafluoroethylene (PTFE) sliding spacer, wherein the PTFE sliding spacer is sleeved on the spring compression sleeve; A top cap is fitted onto the spring compression sleeve and connected to the displacement nut. It is used to receive the reaction force of the compressed spring transmitted through the spring compression sleeve and the polytetrafluoroethylene sliding spacer. The spring compression sleeve can rotate freely within the displacement nut.

2. The disassembly and assembly tool for the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The mounting countersunk hole of the displacement nut is coaxially arranged with the internal thread structure of the displacement nut.

3. The tool for disassembling and assembling the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The spring compression sleeve includes a base, which is installed in the mounting countersunk hole of the displacement nut.

4. The disassembly and assembly tool for the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 3, characterized in that, The polytetrafluoroethylene sliding spacer is disposed between the base of the spring compression sleeve and the top cover.

5. The disassembly and assembly tool for the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The top cap is connected to the displacement nut by screws.

6. The tool for disassembling and assembling the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The width of the compression hook is smaller than the width of the disassembly opening on the compression spring end cap.

7. The disassembly and assembly tool for the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The spring compression sleeve is rotatable relative to the displacement nut so that the compression hook is aligned with the disassembly / assembly opening.

8. The tool for disassembling and assembling the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, When the displacement nut rotates, it causes the compression hook to move up and down to loosen or compress the helical spring.

9. The tool for disassembling and assembling the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The disassembly and assembly tool is used to disassemble and assemble the helical compression spring end cap of the LVDT displacement sensing rod in the aileron servo controller. The displacement sensing rod is a component of the linear variable differential sensor LVDT.

10. The disassembly and assembly tool for the helical spring end cap of the aileron servo controller displacement sensing rod according to claim 1, characterized in that, The PTFE sliding spacer is made of PTFE material.

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