A vibration test device and method for aircraft access door rotary lock

Abstract

The application discloses a kind of vibration test device and method for aircraft hatch rotary lock, belong to hatch rotary lock test technical field.It includes test positioning mechanism, test positioning mechanism includes bottom plate, support ring, fixed ring, cover plate, support column and lock nut, bottom plate is used to install on vibration test table, support column includes column head and column stem, there is bottom plate center hole on bottom plate, there is anti-rotation mechanism between support column and bottom plate, there is cover plate center hole on cover plate, column stem passes through bottom plate center hole, cover plate center hole, its free end is connected with lock nut, there is pressure sensor between lock nut and cover plate, rotary lock is evenly distributed on cover plate in circumferential direction, support head acts on fixed ring.The application can simultaneously install multiple rotary locks on cover plate to carry out vibration test, effectively improve vibration test efficiency, reduce vibration test cost, axial pressure can be applied through lock nut during vibration test, so as to ensure that compression force is stable and controllable, and the consistency of vibration test is high.

Description

Technical Field

[0001] This invention relates to a vibration testing device and method for a rotary lock for an aircraft hatch, belonging to the technical field of rotary lock testing. Background Technology

[0002] To ensure timely maintenance and repair of airborne equipment on aerospace vehicles, numerous openings are typically required on the vehicle's surface. Classified by usage characteristics, openings are divided into quick-release openings and non-quick-release openings. Quick-release openings offer advantages such as high structural strength, flexible use, and easy installation, and are widely used on aircraft fuselages.

[0003] The aircraft's surface hatch is equipped with a rotary lock inside, used for quick opening and reliable locking of the hatch. As a core locking component of the quick-release hatch, the rotary lock is described in Chinese invention patent CN111946152B, which discloses a rotary button lock. The reliability of the rotary lock directly affects the aircraft's flight safety. During use, vibrations from the aircraft or other equipment, as well as environmental factors, can cause the rotary lock to be exposed to vibration for extended periods, potentially leading to component loosening. This directly impacts the maintenance efficiency and flight safety of aircraft such as fighter jets. The rotary lock must withstand multi-directional vibration impacts and clamping forces during flight; therefore, its performance must be verified through vibration testing before deployment. This means that before the rotary lock is put into use, environmental vibration tests must simulate its actual operating vibration conditions to test its locking reliability under different vibration conditions.

[0004] While there are many types of existing vibration testing equipment, there is a lack of dedicated vibration testing equipment for this type of rotary lock. Furthermore, existing general-purpose fixtures cannot accurately simulate the actual installation pressure of the rotary lock, making it difficult to integrate pressure application and vibration testing. Therefore, there is an urgent need for a vibration testing device for aircraft rotary locks that can stably apply pressure and complete the vibration test of the rotary lock. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a vibration testing device and method for rotating locks on aircraft hatches.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A vibration testing device for a rotating lock of an aircraft hatch includes a test positioning mechanism for positioning the rotating lock of the hatch. The test positioning mechanism includes a base plate, a support ring, a fixing ring, a cover plate, a support column, and a locking nut threadedly connected to the support column. The base plate is used to install on a vibration test bench. The top of the support ring is connected to the fixing ring, and the bottom of the support ring is connected to the base plate. The support column includes a column head and a column rod. The base plate has a center hole for positioning the column head. An anti-rotation mechanism is provided between the support column and the base plate. The cover plate has a center hole. The column rod passes through the center hole of the base plate and the center hole of the cover plate. The free end of the column rod is connected to the locking nut. A pressure sensor is provided between the locking nut and the cover plate. The cover plate is used to position the rotary lock. Multiple rotary locks are evenly distributed on the cover plate circumferentially. Each rotary lock includes a lock seat, a support, a locking pin, and a support head. One end of the support is hinged to the lock seat, the middle of the support is connected to the lock seat through a pin, and the other end of the support is connected to the locking pin. The support head is disposed on the working end of the locking pin. The lock seat is connected to the cover plate. During the vibration test, the rotary lock is locked, and the support head acts on the fixed ring.

[0007] The beneficial effects of this invention are as follows: the support ring is connected to the base plate, the base plate is installed on the mounting surface of the vibration test bench, the column head of the support column is installed at the center hole of the base plate, and the anti-rotation mechanism between the support column and the base plate can limit the axial movement of the support column and constrain its circumferential rotation, thereby achieving reliable locking of the support column and preventing axial movement or rotation around the axis during loading and vibration, ensuring the overall structural stability of the device; multiple rotary locks can be fixed on the cover plate, and the multiple rotary locks are evenly distributed circumferentially. The lock seats of the rotary locks are installed on the cover plate, and the rotary locks can open and close by relying on their own structure to achieve the purpose of unlocking and locking; adjusting the height of the locking pin of the rotary lock, the locking pin rotates downward, and the support head can resist... The cover plate is connected to the fixed ring, and then the fixed ring can be installed on the support ring. The center of the cover plate has a center hole that matches the support column. The precise centering of the cover plate is achieved through the cooperation between the support column and the center hole of the cover plate, which can effectively ensure that multiple rotary locks are aligned with the center loading position, avoid radial displacement of the rotary lock position, and achieve uniform force on multiple rotary locks. The column rod passes through the center hole of the base plate and the center hole of the cover plate. The free end of the column rod is connected to the locking nut. The axial preload is applied by tightening the locking nut. The pressure sensor monitors in real time and accurately reaches the test set load. The vibration of the vibration test bench is transmitted to the rotary lock step by step through the base plate, support ring, and fixed ring, thereby completing the vibration test under the preset compression load condition. This invention allows multiple rotary locks to be installed on a cover plate simultaneously for vibration testing, effectively improving testing efficiency and reducing costs. During vibration testing, axial pressure can be precisely applied by tightening the lock nuts, ensuring stable and controllable clamping force and high consistency. Furthermore, loosening the lock nuts on the support column allows the cover plate to rotate around the column, switching between X and Y directions for multi-directional vibration testing. This eliminates the need to adjust the installation orientation of the entire device on the vibration test bench, making operation simple, highly versatile, and significantly improving testing efficiency. The entire device has a simple and compact structure with few parts. The components are easy to process and have low manufacturing costs, resulting in a short assembly chain. This not only greatly improves assembly efficiency but also significantly reduces the risk of accumulated errors in components, effectively enhancing the overall reliability and ease of maintenance.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the anti-rotation mechanism includes an anti-rotation locking block, which is a long strip structure. The column head is provided with a locking block positioning groove for positioning the middle part of the anti-rotation locking block, and the base plate is provided with a locking block end groove for positioning one or both ends of the anti-rotation locking block.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the anti-rotation locking block simultaneously engages with the locking block positioning groove on the column head and the locking block end groove on the base plate. The anti-rotation locking block, with its elongated structure, is compact, easy to assemble and disassemble, and convenient to replace. It solves the problems of jamming and difficult assembly / disassembly caused by wear and debris accumulation in traditional hexagonal structures after long-term use, thus improving the maintenance efficiency and long-term reliability of the device. The anti-rotation locking block cooperates with the locking block positioning groove at the bottom of the support column to restrict the rotation of the support column, preventing the column head rotation from affecting the accuracy of vibration load transmission, improving the stability of the test state, and thus ensuring that the data obtained from the vibration test are true and reliable, accurately reflecting the performance of the rotary lock under actual vibration conditions.

[0011] Furthermore, the center hole of the base plate is a countersunk groove, and the anti-rotation locking block is installed on the column head, with its bottom surface flush with the bottom surface of the base plate.

[0012] The beneficial effects of adopting the above-mentioned further solution are that the center hole of the base plate is a stepped countersunk slot, and the column head of the support column can be sunk into the countersunk slot. The axial limit of the support column is achieved by the stepped surface in the countersunk slot, which can prevent the support column from moving upward. At the same time, the column head sinking into the countersunk slot avoids the vibration test bench and avoids interference between the bottom end of the support column and the table surface of the vibration test bench. The depth of the locking block positioning slot and the locking block end slot are both greater than the height of the anti-rotation locking block. After the anti-rotation locking block is assembled in place, its bottom surface is flush with the bottom surface of the base plate and can completely fit with the table surface of the vibration test bench without interfering with the table surface of the vibration test bench. At the same time, it can also constrain the axial direction of the support column. The support column achieves the purpose of axial limit and circumferential anti-rotation through the anti-rotation locking block, preventing the support column from moving or rotating.

[0013] Furthermore, the base plate is provided with a plurality of mounting slots for connecting to the vibration test bench.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the base plate can be quickly fixed on the table surface of the vibration test bench through the mounting slot, ensuring the overall stability of the device during the vibration test and avoiding displacement of the device, which would affect the accuracy of the vibration test data.

[0015] Furthermore, the mounting slot is an elongated through hole, and multiple mounting slots are evenly arranged circumferentially on the surface of the base plate.

[0016] The beneficial effect of adopting the above-mentioned further solution is that multiple elongated through holes can be adapted to the mounting slots of vibration test benches of different specifications, which is highly versatile and improves the compatibility of the device. It makes it convenient for testers to quickly complete the fixed installation of the device according to the actual installation conditions of the vibration test bench on site, without the need for an additional adapter plate, thus improving the adaptability and installation efficiency of the device.

[0017] Furthermore, the upper part of the column is provided with a threaded section and a hexagonal prism section.

[0018] The advantages of adopting the above-mentioned further solution are that the threaded section facilitates threaded connection with the lock nut, and the lock nut, in conjunction with the threaded section of the support column, applies axial preload. The hexagonal prism section facilitates wrench clamping and fixing, making it easy to tighten the lock nut and apply axial preload.

[0019] Furthermore, the fixing ring is connected to the support ring by fixing bolts.

[0020] The advantage of adopting the above-mentioned further solution is that the fixing ring is installed on the support ring by multiple fixing bolts, realizing the installation and positioning of the fixing ring and the support ring, and making the assembly and disassembly convenient and quick.

[0021] Furthermore, the base plate is connected to the support ring by connecting bolts, and the base plate is provided with bolt holes for installing the connecting bolts, the bolt holes being countersunk holes.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the connecting bolts realize the connection between the support ring and the base plate. The countersunk hole structure allows the head of the connecting bolt to be hidden inside the base plate, avoiding the table surface of the vibration test bench, preventing the head of the connecting bolt from interfering with the table surface of the vibration test bench during installation, and avoiding the head of the connecting bolt protruding and affecting the overall installation of the device.

[0023] Furthermore, the lock seat of the rotary lock is connected to the cover plate by fasteners.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the lock seat is installed on the cover plate by fastening bolts and fastening nuts, realizing the fixed installation of the rotary lock and ensuring the stability of the rotary lock position during the vibration test. Each rotary lock is fixedly installed on the cover plate at three points, which conforms to the actual installation state of the rotary lock of the cover, improves the accuracy of the vibration test results, and facilitates the removal and replacement of the rotary lock after the test.

[0025] This invention also relates to a vibration testing method for a rotary lock for an aircraft hatch, employing the vibration testing device for a rotary lock for an aircraft hatch as described above, with the following steps: S1. The support ring is mounted on the base plate by connecting bolts; S2. The support column passes through the center hole of the base plate, and then the assembly of the base plate, support ring and support column is transferred to the vibration test bench and installed on the vibration test bench. S3. Install multiple rotary locks onto the cover plate using fasteners; S4. The rotary lock is engaged. The lock pin rotates downwards, and the support head rests against the fixed ring, connecting the cover plate and the fixed ring together. S5. Connect the fixing ring connected to the cover plate to the support ring using fixing bolts; S6. Pass the pressure sensor through the support column and place it on the cover plate, then clear the pressure sensor display value to zero; S7. Install the lock nut onto the support column, tighten the lock nut to apply force to the pressure sensor, and stop when the pressure sensor displays the required value; S8. Conduct vibration tests according to the vibration test conditions.

[0026] The beneficial effects of this invention are: by installing the rotary locking position on the device, vibration tests can be conducted under the action of the vibration test bench to simulate its actual use state, thereby realizing the vibration test of the rotary lock under a predetermined clamping force. By simulating the actual installation conditions of the rotary lock, the preset pressure application and vibration test can be carried out in an integrated manner, ensuring that the vibration test data can truly reflect the actual vibration resistance and locking reliability of the rotary lock. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction; Figure 4 This is a top view schematic diagram of the fit between the cover plate and the retaining ring of the present invention; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along the BB direction; Figure 6 This is a bottom view of the structure of the base plate and support column of the present invention. Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure along the CC direction; Figure 8 This is a schematic diagram of the support column of the present invention; Figure 9 A schematic diagram of the rotary lock in its locked state; Figure 10 A schematic diagram of the unlocked state of the rotary lock; Figure 11 This is a three-dimensional structural diagram of the present invention viewed from below. In the diagram, 1. Base plate; 101. Mounting slot; 102. Countersunk slot; 103. Block end slot; 2. Support ring; 3. Fixing ring; 4. Cover plate; 5. Support column; 501. Column head; 5011. Block positioning slot; 502. Column rod; 5021. Hexagonal prism segment; 5022. Threaded segment; 6. Locking nut; 7. Pressure sensor; 8. Anti-rotation locking block; 9. Rotary lock; 901. Lock seat; 902. Support; 903. Locking pin; 904. Support head; 905. Pulley pin; 906. Hinge pin; 10. Connecting bolt; 11. Fixing bolt; 12. Fastener. Detailed Implementation

[0028] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0029] like Figures 1-11 As shown, a vibration testing device for a rotating lock on an aircraft hatch includes a test positioning mechanism for positioning the rotating lock 9. The test positioning mechanism includes a base plate 1, a support ring 2, a fixing ring 3, a cover plate 4, a support column 5, and a locking nut 6 threadedly connected to the support column 5. The base plate 1 is used to mount on a vibration test bench. The top of the support ring 2 is connected to the fixing ring 3, and the bottom of the support ring 2 is connected to the base plate 1. The support column 5 includes a column head 501 and a column rod 502. The base plate 1 has a center hole for positioning the column head 501. An anti-rotation mechanism is provided between the support column 5 and the base plate 1. The cover plate 4 has a center hole. The column rod 502 passes through the center hole of the base plate and the center hole of the cover plate. The free end of the column rod 502 is connected to the locking nut 6. A pressure sensor 7 is provided between the locking nut 6 and the cover plate 4. The cover plate 4 is used to position the rotary lock 9. Multiple rotary locks 9 are evenly distributed on the cover plate 4 along the circumference. Each rotary lock 9 includes a lock seat 901, a support 902, a locking pin 903, and a support head 904. One end of the support 902 is hinged to the lock seat 901 through a hinge pin 906. The middle part of the support 902 is connected to the lock seat 901 through a pin 905. The other end of the support 902 is connected to the locking pin 903. The support head 904 is disposed on the working end of the locking pin 903. The lock seat 901 is connected to the cover plate 4. During the vibration test, the rotary lock 9 is locked, that is, the rotary lock 9 is in a locked state. The support head 904 can act on the fixing ring 3.

[0030] The specific structure of the rotary lock 9 is described in detail in a rotary button lock disclosed in Chinese invention patent with authorization announcement number CN111946152B, and will not be repeated here.

[0031] The pressure sensor 7 can be a force-measuring ring.

[0032] The anti-rotation mechanism includes an anti-rotation locking block 8, which is a long strip structure. The column head 501 is provided with a locking block positioning groove 5011 for positioning the middle part of the anti-rotation locking block 8, and the base plate 1 is provided with a locking block end groove 103 for positioning one or both ends of the anti-rotation locking block 8. The anti-rotation locking block 8 is simultaneously engaged in the locking block positioning groove 5011 on the column head 501 and the locking block end groove 103 on the base plate 1. The anti-rotation locking block 8, with its long strip structure, is compact, easy to disassemble and assemble, and convenient to replace. It can solve the problems of jamming and difficult disassembly and assembly caused by wear and debris accumulation after long-term use of traditional hexagonal structures, thus improving the maintenance efficiency and long-term reliability of the device. The anti-rotation locking block 8 cooperates with the locking block positioning groove 5011 at the bottom of the support column 5 to restrict the rotation of the support column 5, prevent the rotation of the column head 501 from affecting the accuracy of vibration load transmission, improve the stability of the test state, and thus ensure that the data measured by the vibration test is true and reliable, and accurately reflects the performance of the rotary lock 9 under actual vibration conditions.

[0033] The center hole of the base plate is a countersunk groove 102 for positioning the column head 501. The anti-rotation locking block 8 is installed on the column head 501, and its bottom surface is flush with the bottom surface of the base plate 1. The center hole of the base plate is a stepped countersunk slot 102. The column head 501 of the support column 5 can be sunk into the countersunk slot 102. The stepped surface in the countersunk slot 102 achieves axial limitation of the support column 5, which can prevent the support column 5 from moving upward. At the same time, the column head 501 sunk into the countersunk slot 102 avoids the vibration test bench and prevents the bottom end of the support column 5 from interfering with the table surface of the vibration test bench. The depth of the locking block positioning groove 5011 and the locking block end groove 103 are both greater than the height of the anti-rotation locking block 8. After the anti-rotation locking block 8 is assembled in place, its bottom surface is flush with the bottom surface of the base plate 1 and can completely fit with the table surface of the vibration test bench without interfering with the table surface of the vibration test bench. At the same time, it can also constrain the axial direction of the support column 5. The support column 5 achieves axial limitation and circumferential anti-rotation through the anti-rotation locking block 8, which prevents the support column 5 from moving or rotating.

[0034] The base plate 1 is provided with a plurality of mounting slots 101 for connecting to the vibration test bench. The base plate 1 can be quickly fixed to the table surface of the vibration test bench through the mounting slots 101, ensuring the stability of the device as a whole during the vibration test and preventing the device from shifting, which would affect the accuracy of the vibration test data.

[0035] The mounting slots 101 are elongated through holes, and multiple mounting slots 101 are evenly arranged circumferentially on the surface of the base plate 1. These multiple elongated through holes can accommodate mounting slots of vibration test benches of different specifications, offering strong versatility and improving the adaptability and compatibility of the device. This allows test personnel to quickly complete the fixed installation of the device according to the actual installation conditions of the vibration test bench on site, eliminating the need for additional adapter plates and improving the adaptability and installation efficiency of the device.

[0036] The upper part of the column 502 is provided with a threaded section 5022 and a hexagonal prism section 5021. The threaded section 5022 facilitates threaded connection with the locking nut 6, and the locking nut 6, in conjunction with the threaded section 5022 of the support column 5, applies axial preload. The hexagonal prism section 5021 facilitates wrench clamping and fixing, making it easy to tighten the locking nut 6 to apply axial preload.

[0037] The fixing ring 3 is connected to the support ring 2 by fixing bolts 11. The fixing ring 3 is installed on the support ring 2 by multiple fixing bolts 11, realizing the installation and positioning of the fixing ring 3 and the support ring 2, and making the installation and disassembly convenient and quick.

[0038] The base plate 1 is connected to the support ring 2 by connecting bolts 10. The base plate 1 has bolt holes for installing the connecting bolts 10, and the bolt holes are countersunk holes. The connecting bolts 10 connect the support ring 2 and the base plate 1. The countersunk hole structure allows the head of the connecting bolt 10 to be hidden inside the base plate 1, avoiding interference with the table surface of the vibration test bench during installation, and preventing the head of the connecting bolt 10 from protruding and affecting the overall installation of the device.

[0039] The lock seat 901 of the rotary lock 9 is connected to the cover plate 4 via fastener 12. The lock seat 901 is installed on the cover plate 4 by fastening bolts and fastening nuts, realizing the fixed installation of the rotary lock 9. This ensures the stability of the rotary lock 9 during the vibration test. Each rotary lock 9 is fixedly installed on the cover plate 4 at three points, which conforms to the actual installation state of the rotary lock 9, improves the accuracy of the vibration test results, and facilitates the removal and replacement of the rotary lock 9 after the test.

[0040] This invention also relates to a vibration testing method for a rotary lock for an aircraft hatch, employing the vibration testing device for a rotary lock for an aircraft hatch as described above, with the following steps: S1. The support ring 2 is mounted on the base plate 1 by connecting bolts 10; the connecting bolts 10 can apply a torque of 8-12 N·m, such as 10 N·m. S2. The column rod 502 of the support column 5 passes through the center hole of the base plate 1, and then the assembly of the base plate 1, the support ring 2 and the support column 5 is transferred to the vibration test bench and installed on the vibration test bench. S3. Install multiple rotary locks 9 onto the cover plate 4 using fasteners 12; fasteners 12 can apply a torque of 4-6 N·m, such as 5 N·m. S4. The rotary lock 9 is locked, the locking pin 903 rotates downward, and the support head 904 abuts against the fixed ring 3, connecting the cover plate 4 and the fixed ring 3 together; the clamping torque of the locking pin 903 is set to 0.5-3 N.m, such as 2 N.m; S5. Connect the fixing ring 3, which is connected to the cover plate 4, to the support ring 2 using fixing bolts 11; fixing bolts 11 can apply a torque of 8-12 N·m, such as fixing bolts 11 can apply a torque of 10 N·m. S6. Pass the pressure sensor 7 through the support column 5 and place it on the cover plate 4. Clear the value displayed by the pressure sensor 7 to zero. S7. Install the locking nut 6 onto the support column 5, and tighten the locking nut 6 to apply force to the pressure sensor 7. Stop when the pressure sensor 7 displays the required value of 500-10000N; stop when the pressure sensor 7 displays 5000N. S8. Conduct vibration tests according to the vibration test conditions.

[0041] During the vibration test, the vibration test bench first starts low-amplitude vibration. After verifying that the signal and the positioning status of the rotary lock 9 are normal, the load is smoothly increased to the required rated vibration level, and the vibration test of the rotary lock 9 is officially carried out. The entire vibration test is conducted according to the actual working state of the rotary lock 9 installed on the cover.

[0042] The base plate 1 has a countersunk slot 102 in its center hole. The column head 501 of the support column 5 is recessed into the center hole of the base plate, avoiding interference with the vibration test bench surface. The stepped surface in the countersunk slot 102 provides axial positioning of the support column 5, preventing upward movement. Simultaneously, the depth of the countersunk slot 102 can accommodate the column head 501 and the anti-rotation locking block 8. Symmetrical locking block end slots 103 are formed around the countersunk slot 102 to install the anti-rotation locking block 8. The anti-rotation locking block 8 circumferentially engages with the locking and positioning slot at the bottom of the column head 501 of the support column 5, restricting the rotation of the support column 5. After assembly, the bottom surface of the anti-rotation locking block 8 is completely flush with the vibration test bench surface. The circumferential mounting slot 101 of the base plate 1 is a long through hole, adaptable to the mounting holes of vibration test benches of different specifications, offering strong versatility.

[0043] The upper and lower ends of the support ring 2 are respectively connected to the fixed ring 3 and the base plate 1, which play a supporting and force transmission role in the test. It adopts a ring structure and its internal space can be compatible with various models of rotary locks 9, which has strong versatility. The base plate 1, support ring 2 and fixed ring 3 adopt a split structure, which is convenient for disassembly and maintenance. It can solve the problems of poor adaptability and inconvenient maintenance of integrated structures. In addition, the ring structure of the support ring 2 can also achieve lightweighting while ensuring structural strength, reducing the overall weight of the device and facilitating the processing of components.

[0044] The cover plate 4 can be circular. A rotary lock 9 is connected and fixed to the cover plate 4 via bolts and nuts. The rotary lock 9 opens and closes using its own structure. When connecting the cover plate 4 to the fixing ring 3, first rotate the support 902 upwards to unlock it. After fitting the fixing ring 3 into the corresponding position on the cover plate 4, close the rotary lock 9 and tighten the locking pin 903, so that the support head 904 of the rotary lock 9 abuts against the fixing ring 3. Figure 2 As shown, three rotary locks 9 are evenly distributed along the circumference of the cover plate 4. The center of the cover plate 4 is opened with a cover plate center hole that matches the support column 5 to achieve precise centering and effectively ensure that the three rotary locks 9 are aligned with the center loading position, avoiding radial displacement of the rotary locks 9 and achieving uniform force distribution among multiple locks. After loosening the locking nut 6 on the support column 5, the cover plate 4 can be rotated around the support column 5 as a whole, thereby switching the vibration in the X or Y direction, etc., to achieve multi-directional vibration test without adjusting the installation direction of the vibration test bench, effectively improving test efficiency and the versatility of the device.

[0045] This invention can simultaneously position multiple rotary locks 9 for vibration testing, effectively improving testing efficiency and reducing testing costs. Axial pressure can be precisely applied via the locking nut 6, ensuring stable and controllable clamping force and high test consistency. Vibration tests in multiple directions, such as X and Y, can be achieved by rotating the cover plate 4, eliminating the need to adjust the installation direction of the vibration test bench, making operation simple and highly versatile. The support column 5 is axially limited by the center hole of the base plate, and circumferentially restrained by the anti-rotation locking block 8, ensuring reliable locking of the support column 5 and preventing vertical movement and rotation around the axis during loading and vibration, thus ensuring the overall structural stability of the device. The device has a simple and compact overall structure with few components and a short assembly chain, significantly improving the assembly and positioning efficiency of vibration testing and significantly reducing the risk of accumulated errors from multiple parts, effectively improving the overall reliability and ease of maintenance of the vibration testing device.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration testing device for a rotary lock on an aircraft hatch, comprising a test positioning mechanism for positioning the rotary lock (9), characterized in that, The test positioning mechanism includes a base plate (1), a support ring (2), a fixing ring (3), a cover plate (4), a support column (5), and a locking nut (6) threadedly connected to the support column (5). The base plate (1) is used to install on the vibration test bench. The top of the support ring (2) is connected to the fixing ring (3), and the bottom of the support ring (2) is connected to the base plate (1). The support column (5) includes a column head (501) and a column rod (502). The base plate (1) is provided with a center hole for positioning the column head (501). An anti-rotation mechanism is provided between the support column (5) and the base plate (1). The cover plate (4) is provided with a center hole. The column rod (502) passes through the center hole of the base plate and the center hole of the cover plate. The free end of the column rod (502) is connected to the locking nut (6). A pressure sensor (7) is provided between the locking nut (6) and the cover plate (4). The cover plate (4) is used to position the rotary lock (9). Multiple rotary locks (9) are evenly distributed on the cover plate (4) in the circumferential direction. The rotary lock (9) includes a lock seat (901), a support (902), a lock pin (903), and a support head (904). One end of the support (902) is hinged to the lock seat (901). The middle part of the support (902) is connected to the lock seat (901) through a pin (905). The other end of the support (902) is connected to the lock pin (903). The support head (904) is set on the working end of the lock pin (903). The lock seat (901) is connected to the cover plate (4). During the vibration test, the rotary lock (9) is locked, and the support head (904) acts on the fixing ring (3).

2. The vibration testing device for the aircraft hatch rotary lock according to claim 1, characterized in that, The anti-rotation mechanism includes an anti-rotation locking block (8), which is a long strip structure. The column head (501) is provided with a locking block positioning groove (5011) for positioning the middle part of the anti-rotation locking block (8), and the base plate (1) is provided with a locking block end groove (103) for positioning one or both ends of the anti-rotation locking block (8).

3. The vibration testing device for the aircraft hatch rotary lock according to claim 2, characterized in that, The center hole of the base plate is a countersunk groove (102), and the anti-rotation locking block (8) is installed on the column head (501), with its bottom surface flush with the bottom surface of the base plate (1).

4. The vibration testing device for the aircraft hatch rotary lock according to claim 1, characterized in that, The base plate (1) is provided with a plurality of mounting slots (101) for connecting to the vibration test bench.

5. The vibration testing device for the aircraft hatch rotary lock according to claim 4, characterized in that, The mounting slot (101) is a long through hole, and multiple mounting slots (101) are evenly arranged on the surface of the base plate (1) in the circumferential direction.

6. The vibration testing apparatus for a rotary lock for an aircraft hatch according to any one of claims 1-5, characterized in that, The upper part of the column (502) is provided with a threaded section (5022) and a hexagonal prism section (5021).

7. The vibration testing device for the aircraft hatch rotary lock according to claim 1, characterized in that, The fixing ring (3) is connected to the support ring (2) by fixing bolts (11).

8. The vibration testing device for the aircraft hatch rotary lock according to claim 1, characterized in that, The base plate (1) is connected to the support ring (2) by connecting bolts (10). The base plate (1) is provided with bolt holes for installing the connecting bolts (10). The bolt holes are countersunk holes.

9. The vibration testing device for the aircraft hatch rotary lock according to claim 1, characterized in that, The lock seat (901) of the rotary lock (9) is connected to the cover plate (4) by fasteners (12).

10. A vibration testing method for a rotary lock on an aircraft hatch, characterized in that, The vibration testing apparatus for aircraft hatch rotary locks as described in any one of claims 1-9 is used, and the steps are as follows: S1, The support ring (2) is installed on the base plate (1) by connecting bolts (10); S2. The column rod (502) of the support column (5) passes through the center hole of the base plate (1), and then the assembly of the base plate (1), support ring (2) and support column (5) is transferred to the vibration test bench and installed on the vibration test bench. S3. Install multiple rotary locks (9) onto the cover plate (4) using fasteners (12); S4, the rotary lock (9) is locked, the lock pin (903) rotates downward, the support head (904) abuts against the fixed ring (3), and the cover plate (4) is connected to the fixed ring (3); S5. Connect the fixing ring (3) connected to the cover plate (4) to the support ring (2) by fixing bolts (11); S6. Pass the pressure sensor (7) through the support column (5) and place it on the cover plate (4), and clear the value displayed by the pressure sensor (7) to zero. S7. Install the locking nut (6) onto the support column (5), tighten the locking nut (6) to apply force to the pressure sensor (7), and stop when the pressure sensor (7) displays the required value; S8. Conduct vibration tests according to the vibration test conditions.

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