Alignment tool for axis of actuating cylinder of electronic cabin

Abstract

The utility model relates to a tool for aligning axial leads of actuating cylinders of an electronic cabin. The tool comprises a clamp, a centering guide rod and a dial indicator, the clamp is composed of a base, a screw and a support and used for fixing the actuator cylinder. After one end of the centering guide rod is inserted into a bearing inner ring at the position of the worm, the other end of the centering guide rod extends out of the actuator cylinder gearbox; the dial indicator is used for measuring the vertical distance between the worm disc and the axis of the worm. By adjusting the height of the dial indicator and recording readings, the vertical distance between the axis of the worm and the axis of the worm can be calculated, and the number of the gaskets at the bottom of the worm is increased or decreased to meet manual requirements. The device has the advantages of being safe, reliable, easy and convenient to operate, accurate in measurement and the like, effectively improves the maintenance work efficiency, reduces the maintenance cost and the probability of human errors, and is suitable for repairing the A320 electronic cabin actuator cylinder.

Description

Technical Field

[0001] This utility model relates to the field of repair technology for butterfly valve actuators in the electronic cabin of civil aircraft, and in particular to a tooling for aligning the axis of the electronic cabin actuator. Background Technology

[0002] In aircraft avionics bay ventilation systems, the V2T series butterfly air valve plays a crucial role in exhausting overheated air and providing cooling. Due to its high opening and closing frequency and harsh operating environment, the valve's actuator is prone to failure. In existing technologies, assembling the actuator's worm gear and worm disc is difficult. Misalignment of the centerline can lead to abnormal wear on the gears of the worm gear and worm disc, rendering the butterfly air valve unreliable during aircraft operation. Currently, there is a lack of specialized tools and fixtures in China capable of adjusting the centerline alignment of the valve's actuator's worm gear and worm disc. This makes the related work steps cumbersome, prone to human error, and thus introduces unairworthiness factors. Furthermore, traditional installation methods suffer from complex operation, low efficiency, poor safety, and potential damage to the worm gear and worm disc. Therefore, there is an urgent need to design a specialized tooling that is convenient, practical, safe, and reliable without damaging components. Utility Model Content

[0003] This invention aims to provide a rapid measurement solution for the worm gear and rotor axis of the electronic compartment butterfly air valve actuator. This solution addresses the technical problems of existing technologies where the lack of specialized tooling leads to cumbersome and complex procedures, resulting in low maintenance efficiency, poor safety and stability, and potential unairworthiness. The solution enables effective and reliable measurement of the worm gear and rotor axis during assembly, optimizing maintenance processes, eliminating uncontrollable human error, and improving production and maintenance efficiency.

[0004] The purpose of this invention is to provide a tooling for aligning the axis of the electronic cabin actuator cylinder, thereby solving the aforementioned problems in the prior art.

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

[0006] An electronic cabin actuator shaft centerline alignment fixture includes:

[0007] A clamp is used to fix the actuator of a butterfly air valve. The clamp includes a base, a screw, and a bracket. The base is provided with a through hole.

[0008] A truncated cone is set inside the through hole, and the actuator is positioned on the truncated cone; the screw is threaded to the through hole of the bracket, and the actuator is fixed after tightening.

[0009] The centering guide rod has a centering truncated cone at one end, which is located at the position of the worm. After the centering truncated cone is inserted into the inner ring of the bearing at the position of the worm, the end of the centering guide rod away from the centering truncated cone extends out of the actuator gearbox, and the diameter of its extended end is the same as the pitch circle diameter of the worm.

[0010] The dial indicator, located outside the tooling, is used to measure the vertical distance between the worm wheel and the worm shaft centerline. It is adjusted to a suitable height and kept in a horizontal position. The readings of its probe at the edge of the worm wheel and the apex of the centering guide rod are recorded respectively.

[0011] In some specific embodiments, the through hole of the base is adapted to the frustum, which is used to support and initially position the actuator cylinder.

[0012] In some specific embodiments, the centering frustum portion of the centering guide rod is tightly fitted with the inner ring of the bearing at the location of the worm gear, ensuring that the centering guide rod can accurately guide the worm gear to the appropriate position and achieve alignment of the axis.

[0013] In some specific embodiments, it also includes: an adjustable dial indicator support frame;

[0014] The dial indicator is fixed to an adjustable dial indicator support frame via a base. The dial indicator support frame is used to move up and down to adjust the height of the dial indicator, ensuring that its probe can accurately contact the measuring point, thereby accurately measuring the vertical distance between the worm gear and the worm shaft centerline.

[0015] In some specific embodiments, the extended end of the centering guide rod is provided with a marking line, which is evenly distributed along the circumference of the centering guide rod to indicate the extension length of the centering guide rod. This allows operators to quickly determine whether the axis position of the worm gear meets the requirements and improves measurement efficiency.

[0016] In some specific embodiments, the dial indicator support frame is equipped with a locking nut, which is used to fix the height position of the dial indicator, prevent the dial indicator from loosening or shifting during the measurement process, and ensure the accuracy of the measurement data.

[0017] In some specific embodiments, the base of the clamp is provided with an anti-slip pad, which is made of rubber.

[0018] In some specific embodiments, the centering guide rod has a lubricating layer on its centering frustum surface. The lubricating layer is made of wear-resistant lubricating material, which can reduce the friction between the centering guide rod and the inner ring of the bearing, extend the service life of the centering guide rod and the bearing, and at the same time ensure the smooth insertion and removal of the centering guide rod.

[0019] The beneficial effects of this utility model are as follows: This utility model discloses an electronic cabin actuator cylinder axis alignment fixture, comprising: a clamp for fixing the butterfly air valve actuator cylinder, the clamp including a base, a screw, and a bracket, the base having a through hole; a frustum, disposed within the through hole, the actuator cylinder being positioned on the frustum; the screw being threadedly connected to the bracket through hole of the bracket, tightening to fix the actuator cylinder; a centering guide rod, one end being a centering frustum, disposed at the location of the worm gear, the centering frustum being inserted into the inner ring of the bearing at the location of the worm gear, the end of the centering guide rod away from the centering frustum extending out of the actuator cylinder gearbox, its extended end diameter being the same as the pitch circle diameter of the worm gear; and a dial indicator, disposed outside the fixture, for measuring the vertical distance between the worm disc and the worm gear axis, adjusted to a suitable height and kept horizontal, recording the readings of its probe at the edge of the worm disc and the apex of the extended portion of the centering guide rod. This utility model has the following effects:

[0020] Quality, safety and reliability: Based on ensuring safe and reliable product quality, this utility model can effectively reduce material waste, improve work efficiency, ensure the safety and reliability of the maintenance process, and reduce the risk of unairworthiness caused by human error.

[0021] Superior and durable materials: The main body of the tooling is made of 304 stainless steel and hard aluminum. 304 stainless steel ensures the tooling's sturdiness and durability, enabling it to be used stably for a long time in relatively harsh working environments; hard aluminum is used for parts that come into contact with components, preventing damage to components during operation, and also facilitating storage and management while maintaining an aesthetically pleasing appearance.

[0022] Improved work efficiency: This tooling assembly effectively transfers the worm gear pitch circle to be measured to the outside of the actuator, ensuring the accuracy and convenience of measurement without the need for complex preparation steps. This effectively improves maintenance efficiency, reduces maintenance cycle and cost, and decreases the probability of human error. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a tooling structure for aligning the axis of an electronic cabin actuator cylinder according to this utility model;

[0024] Figure 2 This is a schematic diagram of the centering guide rod of this utility model;

[0025] Figure 3 This is a structural schematic diagram of the base of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the fixture of this utility model;

[0027] Figure 5 This is a schematic diagram of the screw structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the frustum of this utility model.

[0029] In the attached diagram: 1. Base; 2. Screw; 3. Bracket; 4. Through hole; 5. Frustum; 6. Bracket through hole; 7. Centering guide rod; 8. Centering frustum. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0031] Reference Figures 1-6 The illustrated electronic cabin actuator axis alignment fixture includes:

[0032] A clamp is used to fix the actuator of a butterfly air valve. The clamp includes a base 1, a screw 2 and a bracket 3. The base 1 is provided with a through hole 4.

[0033] The frustum 5 is set inside the through hole 4, and the actuator is positioned on the frustum 5; the screw 2 is threadedly connected to the bracket through hole 6 of the bracket 3, and the actuator is fixed after tightening.

[0034] The centering guide rod 7 has a centering frustum 8 at one end, which is located at the position of the worm. After the centering frustum 8 is inserted into the inner ring of the bearing at the position of the worm, the end of the centering guide rod 7 away from the centering frustum 8 extends out of the actuator gearbox, and the diameter of its extended end is the same as the pitch circle diameter of the worm.

[0035] The dial indicator, set outside the tooling, is used to measure the vertical distance between the worm wheel and the worm shaft centerline. It is adjusted to a suitable height and kept in a horizontal position. The readings of its probe at the edge of the worm wheel and the vertex of the extended part of the centering guide rod 7 are recorded respectively.

[0036] In this embodiment, each component is described in detail below:

[0037] The fixture is a key component of this alignment tooling. Its main function is to stably and securely fix the butterfly air valve actuator cylinder to the tooling, ensuring that the actuator cylinder will not shift or wobble during the measurement and alignment of the axis, thereby guaranteeing the accuracy and reliability of the measurement results. The fixture consists of a base 1, a screw 2, and a bracket 3.

[0038] The base 1 is a horizontally placed plate-like structure with a through hole 4 on its upper surface. The position and size of the through hole 4 are precisely designed to fit the frustum 5. The frustum 5 is a structure with a certain height and taper, and its larger base surface fits tightly with the through hole 4 of the base 1, allowing the frustum 5 to be stably installed on the base 1. The top of the frustum 5 serves as a positioning surface for placing the actuator cylinder. Its shape and size match the bottom of the actuator cylinder, enabling preliminary positioning of the actuator cylinder and ensuring that it is roughly in the correct position during placement, facilitating subsequent fixing and measurement work.

[0039] The bracket 3 is mounted above the base 1 and has a bracket through hole 6. The screw 2 passes through the bracket through hole 6 and forms a threaded connection with it. By rotating the screw 2, the extension length of the screw 2 in the bracket through hole 6 can be adjusted. When it is necessary to fix the actuator cylinder, the actuator cylinder is placed on the frustum 5, and then the screw 2 is tightened so that the end of the screw 2 gradually presses against the upper part of the actuator cylinder, thereby firmly clamping the actuator cylinder between the frustum 5 and the screw 2, ensuring that the actuator cylinder remains stable during measurement.

[0040] The frustum 5, installed within the through hole 4 of the base 1, serves as the positioning base for the actuator cylinder. Its upper surface forms a platform for placing the actuator cylinder. This platform is precision-machined to ensure high flatness and dimensional accuracy, guaranteeing that the actuator cylinder is positioned correctly when placed on it. The tapered design of the frustum 5 helps guide the actuator cylinder into accurate positioning and also facilitates easy removal of the actuator cylinder when needed.

[0041] The bottom of the frustum 5 fits tightly with the through hole 4 of the base 1, ensuring that the frustum 5 is stable and immovable on the base 1 and will not tilt or loosen due to external forces. This stable installation method provides a reliable support foundation for the actuator, enabling the actuator to remain stable during subsequent measurement and alignment operations, and avoiding measurement errors caused by unstable support.

[0042] The centering guide rod 7 is the core component for aligning the worm gear's axis. One end is designed as a centering frustum 8, the shape and size of which are adapted to the inner ring of the bearing where the worm gear is located. When aligning the worm gear's axis, the centering frustum 8 is aligned and inserted into the inner ring of the bearing where the worm gear is located. Because the centering frustum 8 fits tightly with the inner ring of the bearing, it can accurately guide the worm gear to the appropriate position, thereby achieving initial alignment of the axis.

[0043] The other end of the centering guide rod 7 extends out of the actuator gearbox after being inserted into the inner ring of the bearing. The diameter of this extended end is precisely designed to be the same as the pitch circle diameter of the worm. This design allows the centering guide rod 7 to serve as a substitute reference for the worm's pitch circle during alignment, facilitating subsequent measurement of the perpendicular distance between the worm disc and the worm's axis.

[0044] The centering frustum 8 of the centering guide rod 7 is coated with a lubricating layer. This lubricating layer is made of a wear-resistant lubricating material, exhibiting excellent wear resistance and lubrication performance. During the insertion and removal of the centering guide rod 7 from the bearing inner ring, the lubricating layer significantly reduces the friction between the two, making operation smoother and reducing the risk of insertion difficulties or damage to the bearing inner ring due to excessive friction. Simultaneously, the lubricating layer can also extend the service life of the centering guide rod 7 and the bearing to a certain extent, reducing the frequency of maintenance and component replacement, and lowering maintenance costs.

[0045] A dial indicator is a precision measuring tool used to measure the perpendicular distance between the centerlines of the worm gear and the worm shaft. It offers high accuracy, ease of operation, and provides precise data for centerline alignment. The dial indicator is mounted on an adjustable support frame via a base, allowing for flexible height adjustment.

[0046] During the measurement process, firstly, based on the actual position of the actuator cylinder and the height of the worm gear, move the support frame up and down to adjust the dial indicator to a suitable height so that the dial indicator probe can accurately contact the edge of the worm gear. At this point, record the dial indicator reading as A. Then, adjust the height of the support frame again so that the dial indicator probe contacts the apex of the centering guide rod 7 extending from the actuator cylinder gearbox section, and record the dial indicator reading at this point as B.

[0047] By calculating the difference between readings A and B, the vertical distance between the worm disc and the worm gear's axis can be determined. If this distance exceeds the allowable range specified in the manual, the shims at the bottom of the worm disc need to be adjusted by adding or removing shims until the axis alignment meets the requirements. Specifically, adding shims will move the worm disc upwards, reducing the vertical distance; removing shims will move the worm disc downwards, increasing the vertical distance. Through this precise measurement and adjustment, a highly accurate alignment of the worm disc and worm gear's axis can be ensured, thereby improving the assembly quality and operational reliability of the actuator.

[0048] This section details the key components and functions of the avionics bay actuator centerline alignment fixture. The fixture, through the cooperation of base 1, screw 2, and bracket 3, securely fixes the actuator to the fixture; the frustum 5 provides the initial positioning basis for the actuator; the centering guide rod 7, using its centering frustum 8 and the tight fit with the bearing inner ring, achieves initial alignment of the worm gear centerline, and its precise diameter at the protruding end provides a reference for subsequent measurements; the dial indicator is used to accurately measure the vertical distance between the worm disc and the worm gear centerline, providing data support for precise adjustment of the centerline. These components work together to form a highly efficient and accurate centerline alignment fixture, effectively solving the problems of cumbersome measurement steps and complex operation in existing technologies, improving maintenance efficiency, reducing maintenance costs and the probability of human error, and ensuring the reliability and safety of the aircraft avionics bay ventilation system.

[0049] In some specific embodiments, the through hole 4 of the base 1 is adapted to the frustum 5, which is used to support and initially position the actuator cylinder.

[0050] A through hole 4 is formed on the base 1, which is a horizontally placed plate-like structure and is the basic component of the entire fixture. A frustum 5 is set inside the through hole 4, with its bottom tightly fitting against the inner wall of the through hole 4, and its top located above the base 1 for placing the actuator cylinder.

[0051] The through hole 4 of the base 1 is adapted to the frustum 5. The outer surface of the frustum 5 is in close contact with the inner wall of the through hole 4. The frustum 5 forms an interference fit with the inner wall of the through hole 4 through its own taper, thus being stably installed on the base 1. There is no relative movement between the frustum 5 and the base 1. The two work together as a whole to provide support and initial positioning for the actuator.

[0052] Effect: The frustum 5 fits snugly with the through hole 4 of the base 1, allowing the frustum 5 to be securely mounted on the base 1 without wobbling or tilting. The frustum 5 serves to support and initially position the actuator cylinder. When the actuator cylinder is placed on the frustum 5, its shape and size guide and position it, ensuring it is roughly in the correct position, facilitating subsequent fixing and measurement. Simultaneously, the tight fit between the frustum 5 and the base 1 ensures the structural stability of the entire fixture, effectively supporting the weight of the actuator cylinder and providing a stable foundation for subsequent measurement and alignment operations.

[0053] In some specific embodiments, the centering frustum 8 of the centering guide rod 7 is tightly fitted with the inner ring of the bearing at the location of the worm gear, ensuring that the centering guide rod 7 can accurately guide the worm gear to the appropriate position and achieve alignment of the axis.

[0054] The centering frustum 8 of the centering guide rod 7 is located within the inner ring of the bearing at the location of the worm gear. In the structure of the actuator cylinder, the worm gear is installed in a specific position, with one end connected to a bearing. The inner ring of the bearing is the mating position of the centering frustum 8. One end of the centering guide rod 7 is designed as the centering frustum 8, which is aligned with and inserted into the inner ring of the bearing at the location of the worm gear.

[0055] The centering frustum 8 fits tightly with the inner ring of the bearing where the worm is located, forming a clearance fit or interference fit between them, ensuring that the centering guide rod 7 can accurately guide the worm to the appropriate position. After the centering frustum 8 is inserted into the inner ring of the bearing, the other end of the centering guide rod 7 extends out of the actuator gearbox, and the diameter of its extended end is the same as the pitch circle diameter of the worm, thereby achieving alignment of the axis.

[0056] Effect: The tight fit between the centering frustum 8 and the inner ring of the bearing precisely guides the worm to the appropriate position, ensuring that the worm's axis coincides with the axis of the centering guide rod 7, thus achieving axis alignment. This tight fit allows the centering guide rod 7 to accurately transmit position information, providing a reliable benchmark for subsequent measurements of the vertical distance between the worm disc and the worm's axis. Through the guiding action of the centering guide rod 7, deviations in centerline alignment during the installation of the worm disc and worm are effectively reduced, preventing abnormal wear of the gears on the worm disc and worm surface due to misalignment, improving the assembly quality and operational reliability of the actuator, and ultimately ensuring the normal operation of the aircraft's avionics bay ventilation system.

[0057] In some specific embodiments, it also includes: an adjustable dial indicator support frame;

[0058] The dial indicator is fixed to an adjustable dial indicator support frame via a base. The dial indicator support frame is used to move up and down to adjust the height of the dial indicator, ensuring that its probe can accurately contact the measuring point, thereby accurately measuring the vertical distance between the worm gear and the worm shaft centerline.

[0059] Adjustable dial indicator support stands are typically located externally to the fixture, in a position easily observed and adjusted by the operator. They require sufficient space for vertical adjustment to accommodate measurement needs at different heights.

[0060] The dial indicator is fixed to an adjustable dial indicator support frame via a base. The base and support frame may be connected by threads, clamping devices, or other reliable fixing methods to ensure that the dial indicator will not loosen or shift after being adjusted to the correct position.

[0061] This adjustable support design allows operators to flexibly adjust the height of the dial indicator, ensuring that its probe accurately contacts measurement points such as the edge of the worm gear and the apex of the centering guide rod. Precise adjustment of the dial indicator's position improves measurement accuracy, enabling more reliable measurement of the perpendicular distance between the worm gear and the worm shaft's centerline, thus providing data support for precise alignment of the centerline.

[0062] In some specific embodiments, the extended end of the centering guide rod 7 is provided with a marking line. The marking line is evenly distributed along the circumference of the centering guide rod 7 to indicate the extension length of the centering guide rod 7, so that the operator can quickly judge whether the axis position of the worm gear meets the requirements and improve the measurement efficiency.

[0063] The centering frustum 8 of the centering guide rod 7 is located within the inner ring of the bearing at the location of the worm gear. In the structure of the actuator cylinder, the worm gear is installed in a specific position, and one end of it is connected to a bearing. The inner ring of the bearing is the mating position of the centering frustum 8. One end of the centering guide rod 7 is designed as the centering frustum 8, which is aligned with and inserted into the inner ring of the bearing at the location of the worm gear.

[0064] The centering frustum 8 is tightly fitted with the inner ring of the bearing at the location of the worm gear, possibly using a clearance fit, interference fit, or transition fit, to ensure that the centering guide rod 7 can accurately guide the worm gear to the appropriate position. After the centering frustum 8 is inserted into the inner ring of the bearing, the other end of the centering guide rod 7 extends out of the actuator gearbox.

[0065] The tight fit between the centering frustum 8 and the inner ring of the bearing precisely guides the worm to the appropriate position, ensuring that the worm's axis coincides with the axis of the centering guide rod 7, thus achieving axis alignment. This tight fit allows the centering guide rod 7 to accurately transmit position information, providing a reliable reference for subsequent measurements of the vertical distance between the worm disc and the worm's axis. Through the guiding action of the centering guide rod 7, deviations in centerline alignment during the installation of the worm disc and worm are effectively reduced, preventing abnormal wear of the gears on the worm disc and worm surface due to misalignment, improving the assembly quality and operational reliability of the actuator, and ultimately ensuring the normal operation of the aircraft's avionics bay ventilation system.

[0066] The detailed description above provides a clearer understanding of the structural characteristics, placement, connection relationships, and roles of each component in aligning the electronic cabin actuator axis. The rational design and close cooperation of these components enable this fixture to effectively solve problems such as cumbersome measurement procedures and complex operations in existing technologies, improving maintenance efficiency and reducing maintenance costs and the probability of human error.

[0067] In some specific embodiments, the dial indicator support frame is equipped with a locking nut, which is used to fix the height position of the dial indicator, prevent the dial indicator from loosening or shifting during the measurement process, and ensure the accuracy of the measurement data.

[0068] The locking nut is located on the adjustable dial indicator support frame, close to the dial indicator mounting position, so that it can be quickly locked and fixed after the dial indicator height is adjusted.

[0069] The locking nut is threadedly connected to the support frame. The dial indicator is mounted on the support frame via a base. After the dial indicator is adjusted to the appropriate height, tighten the locking nut to ensure a tight fit between the dial indicator and the corresponding part of the base or support frame, thereby fixing the height of the dial indicator and preventing it from loosening or shifting during measurement.

[0070] Effect: During measurement, the dial indicator needs to remain stable to ensure the accuracy of the measurement data. The locking nut effectively fixes the height of the dial indicator, avoiding measurement errors caused by loosening or displacement. By tightening the locking nut, the dial indicator can be firmly fixed to the support frame, ensuring its position remains unchanged even under external force interference during measurement. This guarantees the reliability of the measurement data and improves the efficiency and quality of the measurement work.

[0071] In some specific embodiments, the base 1 of the clamp is provided with an anti-slip pad, which is made of rubber.

[0072] The anti-slip pad is located at the bottom of the base 1 of the fixture and is in direct contact with the workbench or the surface on which it is placed.

[0073] Anti-slip mats are typically installed on the bottom of base 1 by means of adhesive, screw fixing, or the elasticity of the rubber itself. For example, the back of the anti-slip mat may have strong adhesive, allowing it to be directly attached to the bottom of base 1; or the anti-slip mat may have mounting holes, allowing it to be fixed to base 1 with screws.

[0074] The anti-slip mat is made of rubber, possessing excellent elasticity, wear resistance, and anti-slip properties. During operation, the anti-slip mat increases the friction between the base 1 and the worktable, preventing the fixture from sliding during measurement or adjustment and ensuring its stability. This not only improves operational safety but also avoids measurement errors or component damage caused by fixture slippage, providing a stable foundation for alignment of the entire axis and protecting the worktable surface from scratches.

[0075] In some specific embodiments, the centering guide rod 7 has a centering frustum 8 surface with a lubricating layer made of wear-resistant lubricating material, which can reduce the friction between the centering guide rod 7 and the inner ring of the bearing, extend the service life of the centering guide rod 7 and the bearing, and at the same time ensure the smooth insertion and removal of the centering guide rod 7.

[0076] A lubricating layer is applied to the outer surface of the centering frustum 8 of the centering guide rod 7, covering the entire area in contact with the inner ring of the bearing. The lubricating layer adheres tightly to the surface of the centering frustum 8, forming a uniform protective film. When the centering guide rod 7 is inserted into the inner ring of the bearing, the lubricating layer is located between the centering frustum 8 and the inner ring of the bearing, serving to lubricate and reduce friction.

[0077] The lubrication layer is made of wear-resistant lubricating material, forming a low-friction coefficient film between the centering guide rod 7 and the bearing inner ring, significantly reducing friction between them. This allows the centering guide rod 7 to be inserted and removed from the bearing inner ring more smoothly, reducing operational difficulty and wear on components. Simultaneously, the wear resistance of the lubrication layer extends the service life of the centering guide rod 7 and the bearing, reducing the frequency of maintenance and component replacement, and lowering maintenance costs. Furthermore, the lubrication layer also helps prevent corrosion and oxidation of the centering frustum 8 and the bearing inner ring to a certain extent, further improving component reliability and service life, ensuring smooth alignment of the axis and accuracy of measurement results.

[0078] The working method of this utility model:

[0079] I. Preliminary Preparations

[0080] Inspect the tooling components: Inspect all components of the tooling (clamp, centering guide rod 7, dial indicator, etc.) that align the centerline of the electronic compartment actuator cylinder to ensure they are intact, undamaged, and functioning properly. Check whether the base 1, screw 2, and bracket 3 of the clamp are secure, and whether the frustum 5 is installed firmly; check whether the surface of the centering frustum 8 of the centering guide rod 7 is damaged and whether the lubrication layer is uniform; check whether the dial indicator is sensitive, whether the connection between the indicator base and the support frame is reliable, and whether the locking nut can be tightened properly.

[0081] Prepare the actuator: Prepare the butterfly air valve actuator to be aligned with the axis, clean its surface and the inner ring of the bearing where the worm is located, and remove oil, impurities, etc. to ensure the accuracy of subsequent installation and measurement.

[0082] Clean the work surface: Ensure the work surface is flat, clean, and free of debris to provide a good environment for the installation and operation of the tooling.

[0083] II. Installation tooling components

[0084] Installation clamps

[0085] Place the base: Place the base 1 stably on the workbench, ensuring that the rubber anti-slip pad on the bottom of the base 1 is in full contact with the workbench surface to provide good stability.

[0086] Install the frustum: Insert the frustum 5 into the through hole 4 of the base 1, so that the frustum 5 fits tightly with the through hole 4, and the top of the frustum 5 protrudes from the base 1 for placing the actuator cylinder.

[0087] Mounting bracket and screw: Place bracket 3 above base 1, pass screw 2 through bracket through hole 6 of bracket 3, and thread it in. At this time, screw 2 is in the loose state to facilitate subsequent fixing of the actuator.

[0088] Install centering guide rod

[0089] Inserting the centering frustum: Align the centering frustum 8 of the centering guide rod 7 with the inner ring of the bearing where the worm is located, and slowly insert it until the centering frustum 8 is tightly fitted with the inner ring of the bearing. The other end of the centering guide rod 7 should extend out of the actuator gearbox, and the diameter of its extended end should be the same as the pitch circle diameter of the worm.

[0090] Check the installation: Confirm that the centering guide rod 7 is installed firmly, and that the centering frustum 8 fits tightly with the inner ring of the bearing, without any looseness or tilting.

[0091] Install dial gauge

[0092] Fixed dial indicator: Mount the dial indicator on the adjustable dial indicator support frame using the indicator base, ensuring a secure installation and a reliable connection between the indicator base and the support frame.

[0093] Adjust the dial indicator height: Based on the actual position of the actuator and the height of the worm gear, move the dial indicator support frame up and down to adjust the dial indicator to a suitable height so that the dial indicator probe can accurately contact the edge of the worm gear and the apex of the extended part of the centering guide rod 7.

[0094] Lock the dial indicator position: Tighten the locking nut on the dial indicator support frame to fix the height position of the dial indicator and prevent the dial indicator from loosening or shifting during the measurement process.

[0095] III. Positioning and Fixing the Actuating Cylinder

[0096] Preliminary positioning of the actuator: Carefully place the butterfly air valve actuator on the truncated cone 5. Use the shape and size of the truncated cone 5 to perform preliminary positioning of the actuator, so that the actuator is roughly in the correct position and posture.

[0097] Fixing the actuator: Adjust screw 2 and gradually tighten it to securely clamp the actuator between the frustum 5 and screw 2. During the tightening of screw 2, take care to maintain the stability of the actuator to avoid damage or displacement of the actuator due to improper fixing.

[0098] IV. Centerline Alignment Measurement

[0099] Measuring the reading at the edge of the worm gear: Gently touch the dial indicator probe to the edge of the worm gear, ensuring stable contact without any shaking, and record the dial indicator reading at this time as A.

[0100] Measure the reading at the top of the extended end of the centering guide rod: Move the dial indicator until its probe contacts the top of the extended actuator gearbox section of the centering guide rod 7. After ensuring stable contact, record the dial indicator reading as B.

[0101] Calculate the vertical distance: The vertical distance between the worm gear and the worm shaft centerline is obtained by calculating the difference between readings A and B (AB or BA, determined based on the actual measurement direction and requirements). This distance is then compared to the standard value specified in the manual to determine if it is within the allowable error range.

[0102] V. Centerline Adjustment

[0103] Determine if adjustment is needed: If the calculated vertical distance exceeds the allowable range specified in the manual, the shims at the bottom of the worm gear need to be adjusted; if it is within the allowable range, the centerline alignment is complete, and the final stage of work begins.

[0104] Adjustments are made by adding or removing shims: The number of shims to add or remove from the bottom of the worm gear is determined based on the deviation in vertical distance. If the vertical distance is too large, it indicates the worm gear is positioned too high, requiring the addition of shims to move the worm gear upwards and reduce the vertical distance; conversely, if the vertical distance is too small, it indicates the worm gear is positioned too low, requiring the removal of shims to move the worm gear downwards and increase the vertical distance. After each addition or removal of shims, the axis alignment measurement must be repeated until the vertical distance meets the manual's requirements.

[0105] VI. Verification and Conclusion

[0106] Verify the alignment results: After adjusting the shims and re-measuring, verify again whether the vertical distance between the worm disc and the worm shaft centerline is accurate to ensure that the alignment work meets the technical requirements.

[0107] Finishing steps: Loosen screw 2 and carefully remove the actuator cylinder. Remove the centering guide rod 7 and dial indicator, and sort and store the various components of the tooling to avoid damage or loss. Clean up the work area, ensuring tools and materials are neatly arranged, ready for the next use.

[0108] The above describes the working method of an electronic compartment actuator shaft centerline alignment fixture according to this utility model. This method, through reasonable component installation, positioning and fixing, measurement and adjustment steps, can efficiently and accurately align the worm gear and worm shaft centerlines of the butterfly air valve actuator, effectively improving maintenance efficiency, reducing maintenance costs, minimizing human error, and ensuring the reliability and safety of the aircraft electronic compartment ventilation system.

[0109] The working principle of this utility model:

[0110] Preliminary positioning and fixing of the actuator: First, place the butterfly air valve actuator on the frustum 5 of the fixture. The frustum 5 provides preliminary positioning of the actuator, ensuring it is roughly in the correct position. Then, by tightening the screw 2, the actuator is securely clamped between the frustum 5 and the screw 2, ensuring the actuator remains stable during measurement and adjustment.

[0111] Centerline alignment: Insert the centering frustum 8 of the centering guide rod 7 into the inner ring of the bearing where the worm is located. The centering frustum 8 fits tightly with the inner ring of the bearing, guiding the worm to the appropriate position and achieving initial alignment of the centerlines. The other end of the centering guide rod 7 extends out of the actuator gearbox, and its protruding end diameter is the same as the pitch circle diameter of the worm, providing a reference for subsequent measurements.

[0112] Measuring the vertical distance: Using an adjustable dial indicator support, adjust the dial indicator to a suitable height so that the dial indicator probe contacts the edge of the worm gear and the apex of the extended portion of the centering guide rod 7, and record the readings. Calculate the difference between the two readings to obtain the vertical distance between the worm gear and the worm shaft centerline. If this distance exceeds the manual's requirements, adjust by adding or removing shims from the bottom of the worm gear until the centerline is aligned and meets the requirements.

[0113] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0114] Improve measurement accuracy: The locking nut on the dial indicator support frame can fix the height of the dial indicator, prevent loosening or displacement during measurement, ensure accurate and reliable measurement data, effectively reduce measurement errors, and improve the alignment accuracy of the axis.

[0115] Enhanced tooling stability: The rubber anti-slip pad at the bottom of the fixture base 1 increases the friction with the worktable, preventing the tooling from sliding during operation, providing a stable foundation for the entire measurement and adjustment process, improving operational safety and measurement accuracy, and protecting the worktable surface.

[0116] Extending component lifespan: The lubricating layer on the surface of the centering frustum 8 of the centering guide rod 7 reduces friction with the inner ring of the bearing, reduces wear, extends the lifespan of the centering guide rod 7 and the bearing, reduces maintenance costs and component replacement frequency, and ensures smooth insertion and removal of the centering guide rod 7 from the inner ring of the bearing, improving operational convenience.

[0117] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tooling for aligning the centerline of an electronic cabin actuator cylinder, characterized in that, include: A clamp for fixing the actuating cylinder of a butterfly air valve, the clamp includes a base (1), a screw (2) and a bracket (3), and the base (1) is provided with a through hole (4); A frustum (5) is set inside the through hole (4), and the actuator is positioned on the frustum (5); the screw (2) is threadedly connected to the bracket through hole (6) of the bracket (3), and the actuator is fixed after tightening. The centering guide rod (7) has a centering frustum (8) at one end, which is located at the position of the worm. After the centering frustum (8) is inserted into the inner ring of the bearing at the position of the worm, the end of the centering guide rod (7) away from the centering frustum (8) extends out of the actuator gearbox, and the diameter of its extended end is the same as the pitch circle diameter of the worm. The dial indicator is set outside the tooling and is used to measure the vertical distance between the worm wheel and the worm shaft centerline. It is adjusted to a suitable height and kept in a horizontal position. The readings of its probe at the edge of the worm wheel and the vertex of the extended part of the centering guide rod (7) are recorded respectively.

2. The electronic cabin actuator cylinder axis alignment fixture according to claim 1, characterized in that, The through hole (4) of the base (1) is adapted to the frustum (5), which is used to support and initially position the actuator cylinder.

3. The electronic cabin actuator cylinder axis alignment fixture according to claim 1, characterized in that, The centering guide rod (7) has a centering frustum (8) that fits tightly with the inner ring of the bearing at the location of the worm, ensuring that the centering guide rod (7) can accurately guide the worm to the appropriate position and achieve alignment of the axis.

4. The electronic cabin actuator cylinder axis alignment fixture according to claim 1, characterized in that, Also includes: Adjustable dial indicator support; The dial indicator is fixed to an adjustable dial indicator support frame via a base. The dial indicator support frame is used to move up and down to adjust the height of the dial indicator, ensuring that its probe can accurately contact the measuring point, thereby accurately measuring the vertical distance between the worm gear and the worm shaft centerline.

5. The electronic cabin actuator cylinder axis alignment fixture according to claim 1, characterized in that, The extended end of the centering guide rod (7) is provided with a marking line. The marking line is evenly distributed along the circumference of the centering guide rod (7) to indicate the extension length of the centering guide rod (7), so that the operator can quickly judge whether the axis position of the worm gear meets the requirements and improve the measurement efficiency.

6. The electronic cabin actuator cylinder axis alignment fixture according to claim 4, characterized in that, The dial indicator support frame is equipped with a locking nut, which is used to fix the height position of the dial indicator, prevent the dial indicator from loosening or shifting during the measurement process, and ensure the accuracy of the measurement data.

7. The electronic cabin actuator cylinder axis alignment fixture according to claim 4, characterized in that, The base (1) of the clamp is provided with an anti-slip pad, which is made of rubber.

8. The electronic cabin actuator cylinder axis alignment fixture according to claim 4, characterized in that, The centering guide rod (7) has a lubricating layer on its centering frustum (8) surface. The lubricating layer is made of wear-resistant lubricating material, which can reduce the friction between the centering guide rod (7) and the inner ring of the bearing, extend the service life of the centering guide rod (7) and the bearing, and at the same time ensure the smooth insertion and removal of the centering guide rod (7).

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