Testing device and method for latch hook mechanism
By designing the hook mechanism test device, the driving torque and angular displacement of the hook mechanism are measured in real time, and the hatch opening and closing process is simulated, the problem of the wear of the lock mechanism cannot be effectively tested in the prior art, and the accuracy and reliability of the locking position of the lock mechanism are improved.
Patent Information
- Application Number
- CN202510699968.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2025-07-22
AI Technical Summary
The existing friction and wear test machines cannot fully meet the friction and wear test requirements of the moving pair in the hatch door locking mechanism, which affects the reliability and accuracy of the locking mechanism through the center.
A test device for a locking hook mechanism is designed, including a bracket, drive structure, drive shaft, drive rod, connecting pull rod and lock hook. The driving torque and angular displacement of the locking hook mechanism are measured in real time through torque sensors and angular displacement sensors, simulate the motion pattern during the hatch opening and closing process, and verify the impact of the wear of the motion pair on the locking position accuracy of the locking hook mechanism through the center.
The friction and wear tests on the movement pairs of the locking hook mechanism are realized, the impact of wear on the accuracy of the locking position of the locking hook mechanism through the center is verified, the impact of different wear materials on the locking hook mechanism is tested, and the reliability and accuracy of the locking hook mechanism is improved.
Smart Images
Figure CN120348478A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of aircraft design, and particularly to a test device and method for a locking hook mechanism. Background Art
[0002] Currently, the boarding doors of existing civil aircraft usually adopt a locking hook mechanism to achieve the locking function of the cabin door and prevent the cabin door from being accidentally opened. The locking hook mechanism is located at the top of the boarding door and is a sub-mechanism in the cabin door lifting mechanism. When the cabin door is closed by the lifting mechanism, the locking hook in the locking hook mechanism hooks the pin shaft on the fuselage to prevent the cabin door from being accidentally opened. When the cabin door is in the closed state, the locking hook mechanism is in the over-center locking state. At this time, when the driven locking hook is subjected to an accidental load and drives the lifting mechanism of the cabin door to move in the unlocking direction, the mechanism will move to its dead point position. At this time, the moment of the accidental load on the driving member is zero, and the mechanism will no longer continue to move in the unlocking direction to achieve the function of preventing the cabin door from being accidentally opened.
[0003] During use, each moving pair in the locking hook mechanism wears during multiple openings and closings of the cabin door, which has an adverse effect on the reliability of the over-center locking of the locking hook mechanism and may even lead to the failure of the cabin door locking function. However, due to the particularity of the motion law of the cabin door locking hook mechanism, the existing friction and wear testing machines can only measure the wear of a single moving pair under a specific motion law and cannot fully meet the requirements of the friction and wear tests of the moving pairs in the cabin door locking hook mechanism. Summary of the Invention
[0004] The purpose of the present invention is to provide a test device and method for a locking hook mechanism to solve the problems existing in the above-mentioned prior art, and to be able to test the friction and wear of each moving pair in the cabin door locking hook mechanism and verify the influence of the wear of the moving pair on the accuracy of the over-center locking position of the locking hook mechanism.
[0005] To achieve the above purpose, the present invention provides the following solutions:
[0006] The present invention provides a test device for a locking hook mechanism, including: a bracket and a driving structure, a driving shaft, a driving rod, a connecting rod and a locking hook arranged on the bracket. The power output end of the driving structure is used for fixedly connecting with one end of the driving shaft. The driving shaft is rotatably connected with the bracket. The driving shaft is used for fixedly connecting with one end of the driving rod. The other end of the driving rod is rotatably connected with one end of the connecting rod. The other end of the connecting rod is rotatably connected with the locking hook. One end of the locking hook is rotatably connected with the bracket. The other end of the locking hook can hook the pin shaft on the bracket. The locking hook hooking the pin shaft is used to simulate the hooking joint point between the locking hook and the aircraft fuselage when the cabin door is opened and closed. A torque sensor is arranged at the output end of the driving structure. A first angular displacement sensor is arranged on the driving shaft. A second angular displacement sensor is arranged at one end of the locking hook.
[0007] In some specific embodiments, the output end of the driving structure is connected to the torque sensor through a first coupling, and the torque sensor is connected to one end of the driving shaft through a second coupling.
[0008] In some specific embodiments, the first structure is a first sliding bearing, and a first bearing bush is arranged between the first sliding bearing and the driving shaft.
[0009] In some specific embodiments, the driving shaft is key-connected to one end of the connecting pull rod, and the driving shaft is perpendicularly arranged to the connecting pull rod.
[0010] In some specific embodiments, the second structure is a first self-lubricating spherical plain bearing structure, and the third structure is a second self-lubricating spherical plain bearing structure.
[0011] In some specific embodiments, the first self-lubricating spherical plain bearing structure includes a first pin shaft, a first self-lubricating spherical plain bearing and a first self-lubricating spherical plain bearing support. The first pin shaft is connected to the first self-lubricating spherical plain bearing support. The first self-lubricating spherical plain bearing is rotatably connected to the first pin shaft, and a first gasket is arranged between the first self-lubricating spherical plain bearing and the first pin shaft. The first self-lubricating spherical plain bearing is threadedly connected to one end of the connecting pull rod, and the first self-lubricating spherical plain bearing support is arranged at the other end of the driving rod. The second self-lubricating spherical plain bearing structure includes a second pin shaft, a second self-lubricating spherical plain bearing and a second self-lubricating spherical plain bearing support. The second pin shaft is connected to the second self-lubricating spherical plain bearing support. The second self-lubricating spherical plain bearing is rotatably connected to the second pin shaft, and a second gasket is arranged between the second self-lubricating spherical plain bearing and the second pin shaft. The second self-lubricating spherical plain bearing is threadedly connected to the other end of the connecting pull rod, and the second self-lubricating spherical plain bearing support is arranged on the locking hook.
[0012] In some specific embodiments, the thread directions of the two ends of the connecting pull rod are opposite, and the distance between the first self-lubricating spherical plain bearing and the second self-lubricating spherical plain bearing is adjusted by rotating the connecting pull rod. A limiting structure for restricting the driving rod is arranged on the bracket.
[0013] In some specific embodiments, one end of the locking hook is fixedly connected to the output shaft, the output shaft is rotatably connected to the bracket, and the second angular displacement sensor is arranged on the output shaft.
[0014] In some specific embodiments, one end of the locking hook is key-connected to the output shaft, the fourth structure is a second sliding bearing, and a second bearing bush is arranged between the second sliding bearing and the output shaft.
[0015] The present invention also discloses a test method for a test device adopting the hook mechanism, including:
[0016] When conducting the accuracy verification test of the hook mechanism passing through the central position, calculate the wear amount of the first structure, the second structure, the third structure, the fourth structure, and the hook of the hook mechanism, and establish a digital model for dynamic simulation. Measure the angular displacement of the driving rod after wear through the first angular displacement sensor and measure the angular displacement of the hook after wear through the second angular displacement sensor, so as to realize the theoretical analysis of the influence of a single set of wear materials on the accuracy of the central locking position of the hook mechanism. According to the above calculation and analysis, obtain the wear amount, process the first structure, the second structure, the third structure, the fourth structure, and the hook with corresponding dimensions and shapes, scan the topography of the to-be-worn surfaces of the first structure, the second structure, the third structure, the fourth structure, and the hook, and measure the relevant parameters of the first structure, the second structure, the third structure, the fourth structure, and the hook. Check whether the processed first structure, second structure, third structure, fourth structure, and hook meet the dimensions after wear in the theoretical calculation. Subsequently, install the processed first structure, second structure, third structure, fourth structure, and hook at the corresponding positions. When the driving rod rotates to the maximum angular displacement under the action of the driving structure, measure the angular displacements of the driving rod and the hook, and compare and analyze the measured angular displacement data of the driving rod and the hook with the results of the dynamic simulation to complete the accuracy verification test of the central locking position of the hook mechanism;
[0017] When conducting the wear test of the kinematic pair of the hook mechanism, first process the first structure, the second structure, the third structure, the fourth structure, and the hook to be tested according to the set materials, scan the topography of the to-be-worn surfaces of the first structure, the second structure, the third structure, the fourth structure, and the hook, and measure the relevant parameters of the first structure, the second structure, the third structure, the fourth structure, and the hook, and measure the relevant parameters of the first structure, the second structure, the third structure, the fourth structure, and the hook. Install the processed first structure, second structure, third structure, fourth structure, and hook at the corresponding positions. Subsequently, conduct the reciprocating wear test of the hook mechanism according to the actual movement law of the cabin door; the driving structure drives the hook mechanism to perform reciprocating movement with a set number of times and a set angular displacement. As the first structure, the second structure, the third structure, the fourth structure, and the hook wear and their dimensions change, during the entire reciprocating wear test process, measure the angular displacement of the driving rod through the first angular displacement sensor and measure the angular displacement of the hook through the second angular displacement sensor, and obtain the central locking position of the hook mechanism according to the angular displacements of the driving shaft and the hook at the end of wear. Subsequently, scan the topography of the worn surfaces of the first structure, the second structure, the third structure, the fourth structure, and the hook again, and measure the corresponding wear volume.
[0018] The present invention has achieved the following technical effects compared with the prior art:
[0019] The test device for the locking hook mechanism of the present invention simulates the kinematic pairs of the locking hook mechanism through the first structure, the second structure, the third structure and the fourth structure, provides a driving torque through the driving structure, simulates the torque transmitted to the locking hook mechanism during the opening and closing of the hatch, drives the locking hook mechanism to move, and measures the driving torque of the locking hook mechanism, the angular displacement of the driving shaft and the angular displacement of the locking hook during multiple opening and closing processes of the hatch in real time through the torque sensor, the first angular displacement sensor and the second angular displacement sensor; verifies the actual influence of the wear of the kinematic pair on the accuracy of the over-center locking position of the locking hook mechanism; replaces the part materials in each kinematic pair and tests the influence of the worn materials on the accuracy of the over-center locking position of the locking hook mechanism.
[0020] Based on the test device for the locking hook mechanism of the present invention, it is possible to realize the verification test of the over-center locking position accuracy of the locking hook mechanism and the wear test of the kinematic pair of the locking hook mechanism, measure the real-time output torque of the driving structure, the real-time dynamic angular displacement of the driving shaft and the output shaft, verify the influence of the wear of the kinematic pair on the accuracy of the over-center locking position of the locking hook mechanism, and test the influence of different worn materials on the over-center locking position of the locking hook mechanism. Description of the Drawings
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0022] Figure 1 Schematic diagram of the test device for the locking hook mechanism in some embodiments of the present invention;
[0023] Figure 2 Schematic diagram of the connection of the driving shaft, the driving rod and the first angular displacement sensor in some embodiments of the present invention;
[0024] Figure 3 Partial enlarged view of the driving rod, the connecting rod and the first self-lubricating spherical plain bearing structure in some embodiments of the present invention;
[0025] Figure 4 Schematic diagram of the connection of the locking hook, the output shaft and the second angular displacement sensor in some embodiments of the present invention;
[0026] Figure 5 Partial enlarged view of the locking hook, the connecting rod and the second self-lubricating spherical plain bearing in some embodiments of the present invention;
[0027] Figure 6Partial cross-sectional view of the first self-lubricating spherical plain bearing structure in some embodiments of the present invention;
[0028] Figure 7 Partial cross-sectional view of the second self-lubricating spherical plain bearing structure in some embodiments of the present invention;
[0029] In the figure: 1 - test base, 2 - drive structure, 3 - first coupling, 4 - torque sensor, 5 - second coupling, 6 - first sliding bearing, 7 - drive bracket, 8 - drive shaft, 9 - drive rod, 10 - first self-lubricating spherical plain bearing support, 11 - first self-lubricating spherical plain bearing, 12 - connecting tie rod, 13 - second self-lubricating spherical plain bearing support, 14 - second self-lubricating spherical plain bearing, 15 - locking hook, 16 - pin shaft, 17 - second angular displacement sensor, 18 - output shaft, 19 - second sliding bearing, 20 - first angular displacement sensor, 21 - link mechanism support, 22 - torque sensor support, 23 - first flat key, 24 - drive rod set screw, 25 - drive shaft set screw, 26 - first pin shaft, 27 - first bushing, 28 - first nut, 29 - second pin shaft, 30 - second bushing, 31 - second nut, 32 - locking hook set screw, 33 - second flat key, 34 - first bearing bush, 35 - first gasket, 36 - second gasket, 37 - second bearing bush, 38 - limiting structure. Specific embodiments
[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0031] The purpose of the present invention is to provide a test device and method for a locking hook mechanism to solve the problems existing in the above-mentioned prior art and be able to test the friction and wear of each kinematic pair in the cabin door locking hook mechanism.
[0032] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0033] Embodiment 1
[0034] As Figures 1 to 7As shown in the figure, this embodiment provides a test device for a locking hook mechanism, including: a test base 1, a bracket, a driving structure 2, a driving shaft 8, a driving rod 9, a connecting pull rod 12, and a locking hook 15. The bracket is arranged on the base. The bracket includes a driving bracket 7, a connecting rod mechanism bracket 21, and a torque sensor bracket 22. The driving structure 2 is arranged on the driving bracket 7. The power output end of the driving structure 2, which is a motor driving structure 2, is used for fixedly connecting with one end of the driving shaft 8. The driving shaft 8 is rotationally connected with the connecting rod mechanism bracket 21 through a first structure. The driving shaft 8 is used for fixedly connecting with one end of the driving rod 9. The other end of the driving rod 9 is rotationally connected with one end of the connecting pull rod 12 through a second structure. The other end of the connecting pull rod 12 is rotationally connected with the locking hook 15 through a third structure. One end of the locking hook 15 is rotationally connected with the connecting rod mechanism bracket 21 through a fourth structure. The other end of the locking hook 15 can hook the pin shaft 16 on the connecting rod mechanism bracket 21. The locking hook 15 hooking the pin shaft 16 is used to simulate the hooking joint point between the locking hook 15 and the aircraft fuselage when the cabin door is opened and closed. A torque sensor 4 is arranged at the output end of the driving structure 2. The torque sensor 4 is arranged on the torque sensor bracket 22. A first angular displacement sensor 20 is arranged on the driving shaft 8. A second angular displacement sensor 17 is arranged at one end of the locking hook 15. The first angular displacement sensor 20 can measure the angular displacement of the driving rod 9 in real time. The second angular displacement sensor 17 can measure the angular displacement of the locking hook 15 in real time, and verify the result of the accuracy of the locking hook mechanism passing through the central locking position after the wear of the kinematic pair in the theoretical calculation.
[0035] In the specific implementation of some embodiments, the output end of the driving structure 2 is connected with the torque sensor 4 through a first coupling 3. The torque sensor 4 is connected with one end of the driving shaft 8 through a second coupling 5. The torque sensor 4 monitors the torque of the driving structure 2 in real time. The driving structure 2 is connected with the driving shaft 8 successively through the first coupling 3, the torque sensor 4, and the second coupling 5. Both the first coupling 3 and the second coupling 5 are flexible couplings. The driving structure 2 can output the same torque as that transmitted to the locking hook mechanism when the cabin door is opened and closed, and simulate the motion law of the locking hook mechanism when the cabin door is opened and closed.
[0036] In the specific implementation of some embodiments, the first structure is a first sliding bearing 6. The first sliding bearing 6 is a detachable structure. A first bearing bush 34 is arranged between the first sliding bearing 6 and the driving shaft 8. The first bearing bush 34 is a self-lubricating bearing bush.
[0037] In the specific implementation of some embodiments, one end of the driving shaft 8 is connected with the connecting pull rod 12 through a first flat key 23. And a driving rod set screw 24 is arranged on the driving rod 9. The driving shaft 8 and the connecting pull rod 12 are arranged perpendicular to each other. A first angular displacement sensor 20 coaxial with the driving shaft 8 is arranged at the other end of the driving shaft 8. The first angular displacement sensor 20 is connected with the driving shaft 8 through a driving shaft set screw 25.
[0038] In the specific implementation manners of some embodiments, the second structure is a first self-lubricating spherical plain bearing structure, and the third structure is a second self-lubricating spherical plain bearing structure.
[0039] In the specific implementation manners of some embodiments, the first self-lubricating spherical plain bearing structure is a detachable structure. The first self-lubricating spherical plain bearing structure includes a first pin 26, a first bushing 27, a first nut 28, a first self-lubricating spherical plain bearing 11, and a first self-lubricating spherical plain bearing support 10. The first pin 26 is connected to the first self-lubricating spherical plain bearing support 10, and the limit is realized by the threaded connection between the first nut 28 and the first pin 26. The first self-lubricating spherical plain bearing 11 is rotatably connected to the first pin 26. The first bushing 27 is sleeved on the first pin 26, and the first bushing 27 is located between the first self-lubricating spherical plain bearing 11 and the first self-lubricating spherical plain bearing support 10. A first gasket 35 is arranged between the first self-lubricating spherical plain bearing 11 and the first pin 26. One end of the first self-lubricating spherical plain bearing 11 is threadedly connected to the connecting rod 12. The first self-lubricating spherical plain bearing support 10 is arranged at the other end of the driving rod 9. The second self-lubricating spherical plain bearing structure is a detachable structure. The second self-lubricating spherical plain bearing structure includes a second pin 29, a second bushing 30, a second nut 31, a second self-lubricating spherical plain bearing 14, and a second self-lubricating spherical plain bearing support 13. The second pin 29 is connected to the second self-lubricating spherical plain bearing support 13, and the limit is realized by the threaded connection between the second nut 31 and the second pin 29. The second self-lubricating spherical plain bearing 14 is rotatably connected to the second pin 29. The second bushing 30 is sleeved on the second pin 29, and the second bushing 30 is located between the second self-lubricating spherical plain bearing 14 and the second self-lubricating spherical plain bearing support 13. A second gasket 36 is arranged between the second self-lubricating spherical plain bearing 14 and the second pin 29. The other end of the second self-lubricating spherical plain bearing 14 is threadedly connected to the connecting rod 12. The second self-lubricating spherical plain bearing support 13 is arranged on the locking hook 15. In this embodiment, the thread directions at both ends of the connecting rod 12 are opposite, and the distance between the first self-lubricating spherical plain bearing 11 and the second self-lubricating spherical plain bearing 14 of the connecting rod 12 is adjusted by rotating the connecting rod 12.
[0040] In the specific implementation manners of some embodiments, a limiting structure 38 for limiting the driving rod 9 is arranged on the link mechanism support 21.
[0041] In the specific implementation manners of some embodiments, the pin 16 is fixed at a preset position of the link mechanism support 21. The preset position is the joint point of the locking hook 15 and the aircraft fuselage, and is used to simulate the contact process between the locking hook 15 and the pin 16 when the cabin door is opened and closed, and the friction and wear generated by the locking hook 15 during this process.
[0042] In the specific implementation manners of some embodiments, one end of the locking hook 15 is fixedly connected to the output shaft 18. The output shaft 18 is rotatably connected to the link mechanism bracket 21. The second angular displacement sensor 17 is connected to one end of the output shaft 18 by a set screw, and the second angular displacement sensor 17 is coaxially arranged with the output shaft 18.
[0043] In the specific implementation manners of some embodiments, one end of the locking hook 15 is connected to the output shaft 18 by a second flat key 33, and a locking hook set screw 32 is arranged on the locking hook 15. The fourth structure is the second sliding bearing 19. The second sliding bearing 19 is a detachable structure. A second bearing bush 37 is arranged between the second sliding bearing 19 and the output shaft 18. The second bearing bush 37 is a self-lubricating bearing bush.
[0044] The working principle of this embodiment is as follows:
[0045] The driving structure 2 provides a driving torque to simulate the torque transmitted to the locking hook mechanism during the opening and closing of the hatch. The driving structure 2 transmits the torque to the driving shaft 8 through the first coupling 3, the torque sensor 4, and the second coupling 5, causing the driving shaft 8 to rotate reciprocally. The driving shaft 8 is connected by a first flat key 23 to cause the driving rod 9 to make the same reciprocating rotation. The driving rod 9 transmits the motion and force to the locking hook 15 through the first self-lubricating joint bearing support 10, the first self-lubricating joint bearing 11, the connecting rod 12, the second self-lubricating joint bearing support 13, and the second self-lubricating joint bearing 14, causing the locking hook 15 to rotate reciprocally around the output shaft 18. When the hatch is closed, the locking hook 15 remains in the position of hooking the pin shaft 16, and the locking hook mechanism is in the over-center locking position.
[0046] One end of the connecting rod 12 is connected to the driving rod 9 through the first self-lubricating joint bearing support 10 and the first self-lubricating joint bearing 11. The other end of the connecting rod 12 is connected to the locking hook 15 through the second self-lubricating joint bearing support 13 and the second self-lubricating joint bearing 14.
[0047] When the driving rod 9 rotates to the set maximum angular displacement, the locking hook 15 hooks the pin shaft 16, and the locking hook mechanism is in the over-center locking position.
[0048] The torque sensor 4 measures the real-time output torque of the driving structure 2. The first angular displacement sensor 20 measures the real-time angular displacement of the driving rod 9. The second angular displacement sensor 17 measures the real-time angular displacement of the locking hook 15.
[0049] The test device of the locking hook mechanism in this embodiment simulates the motion law of the locking hook mechanism when the hatch door is opened and closed; simulates the wear of each kinematic pair of the locking hook mechanism when the hatch door is opened and closed; verifies the influence of the wear of the kinematic pair on the accuracy of the over-center locking position of the locking hook mechanism; by replacing the materials of the first bearing bush 34, the first gasket 35, the second gasket 36, the second bearing bush 37 and the locking hook 15, tests the influence of different wear-resistant materials on the accuracy of the over-center locking position of the locking hook mechanism.
[0050] The test device of the locking hook mechanism in this embodiment provides a driving torque through the driving structure 2, simulates the torque transmitted to the locking hook mechanism during the opening and closing of the hatch door, drives the locking hook mechanism to move, and measures the driving torque of the locking hook mechanism, the angular displacement of the driving shaft 8 and the angular displacement of the locking hook 15 during multiple opening and closing processes of the hatch door in real time through the torque sensor 4, the first angular displacement sensor 20 and the second angular displacement sensor 17; verifies the actual influence of the wear of the kinematic pair on the accuracy of the over-center locking position of the locking hook mechanism; replaces the part materials in each kinematic pair and tests the influence of the wear-resistant materials on the accuracy of the over-center locking position of the locking hook mechanism.
[0051] Embodiment 2
[0052] As Figures 1 to 7 shown, this embodiment discloses a test method using the test device of the locking hook mechanism in Embodiment 1, including:
[0053] When conducting the accuracy verification test of the hook mechanism passing through the central position, according to the Archard microconvex body contact model, Hertz contact theory and wear experience curve, combined with the "effective rod length theory" and "continuous contact model", calculate the wear amounts of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the hook 15 of the hook mechanism, and establish a digital model for dynamic simulation. Measure the angular displacement of the driving rod 9 after wear through the first angular displacement sensor 20 and measure the angular displacement of the hook 15 after wear through the second angular displacement sensor 17, so as to realize the theoretical analysis of the influence of a single set of wear materials (the first bearing bush 34, the first gasket 35, the second gasket 36, the second bearing bush 37 and the hook 15) on the accuracy of the central locking position of the hook mechanism. According to the above calculation and analysis, obtain the wear amounts of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the hook 15. Process the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the hook 15 with corresponding dimensions and shapes. Scan the to-be-worn surfaces (inner cylindrical surface) of the first bearing bush 34 of the first structure, the to-be-worn surface (inner spherical surface) of the first gasket 35 of the second structure, the to-be-worn surface (inner spherical surface) of the second gasket 36 of the third structure, the to-be-worn surface (inner cylindrical surface) of the second bearing bush 37 of the fourth structure, and the to-be-worn surface (inner surface, that is, the surface in contact with the pin shaft 16) of the hook 15 through a three-dimensional topography measuring instrument, and measure the relevant parameters of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the hook 15. Check whether the processed first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the hook 15 meet the sizes after wear in the theoretical calculation. Subsequently, install the processed first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the hook 15 onto the test bench. When the driving rod 9 rotates to the maximum angular displacement under the action of the driving structure 2, measure the angular displacements of the driving rod 9 and the hook 15, and compare and analyze the measured angular displacement data of the driving rod 9 and the hook 15 with the simulation results of the dynamic model to complete the verification test of the accuracy of the central locking position of the hook mechanism;
[0054] When conducting the wear test on the kinematic pairs of the locking hook mechanism, first process the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 to be tested according to the set materials. Scan the topography of the worn surfaces of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 using a three-dimensional topography measuring instrument, and measure the relevant parameters of the first structure, the second structure, the third structure, the fourth structure, and the locking hook 15. Also measure the relevant parameters of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15. Subsequently, install the processed first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 onto the test bench, and then conduct the reciprocating wear test of the locking hook mechanism according to the actual movement law of the hatch door; the driving structure 2 drives the locking hook mechanism to perform reciprocating motion with a set number of times and a set angular displacement. As the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 wear, the dimensions of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 change. During the entire reciprocating wear test process, measure the angular displacement of the driving rod 9 through the first angular displacement sensor 20 and measure the angular displacement of the locking hook 15 through the second angular displacement sensor 17. Based on the angular displacements of the driving shaft 8 and the locking hook 15 at the end of the wear, obtain the over-center locking position of the locking hook mechanism. Subsequently, scan the topography of the worn surfaces of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 again using a three-dimensional topography measuring instrument, and measure the corresponding wear volume. Thus, a set of tests on the influence of the wear materials on the over-center locking position accuracy of the locking hook mechanism is completed. Similarly, replace the materials of the first bearing bush 34 of the first structure, the first gasket 35 of the second structure, the second gasket 36 of the third structure, the second bearing bush 37 of the fourth structure, and the locking hook 15 in the above test with other wear materials that need to be tested, repeat the above reciprocating wear test again and measure the wear conditions of the wear materials and the angular displacements of the driving shaft 8 and the locking hook 15, judge the over-center locking position state of the locking hook mechanism, and then compare the test results corresponding to each set of wear materials to obtain the influence degree of different materials on the over-center locking position accuracy of the locking hook mechanism.
[0055] The test device for the latch mechanism based on this embodiment can implement the verification test of the accuracy of the latch mechanism passing through the central locking position and the wear test of the kinematic pair of the latch mechanism, measure the real-time output torque of the driving structure 2, the real-time dynamic angular displacement of the driving shaft 8 and the output shaft 18, verify the influence of the wear of the kinematic pair on the accuracy of the latch mechanism passing through the central locking position, and test the influence of different wear materials on the latch mechanism passing through the central locking position.
[0056] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. A test device for a locking hook mechanism, characterized in that: Comprising: A bracket, and a driving structure, a driving shaft, a driving rod, a connecting pull rod and a locking hook arranged on the bracket. The power output end of the driving structure is used for fixedly connecting with one end of the driving shaft. The driving shaft is rotationally connected with the bracket through a first structure. The driving shaft is used for fixedly connecting with one end of the driving rod. The other end of the driving rod is rotationally connected with one end of the connecting pull rod through a second structure. The other end of the connecting pull rod is rotationally connected with the locking hook through a third structure. One end of the locking hook is rotationally connected with the bracket through a fourth structure. The other end of the locking hook can hook a pin shaft on the bracket. The locking hook hooking the pin shaft is used to simulate the hooking joint point between the locking hook and the aircraft fuselage when the cabin door is opened and closed. A torque sensor is arranged at the output end of the driving structure, a first angular displacement sensor is arranged on the driving shaft, and a second angular displacement sensor is arranged at one end of the locking hook.
2. The test device for the locking hook mechanism according to claim 1, characterized in that: The output end of the driving structure is connected with the torque sensor through a first coupling, and the torque sensor is connected with one end of the driving shaft through a second coupling.
3. The test device for the locking hook mechanism according to claim 1, characterized in that: The first structure is a first sliding bearing, and a first bearing bush is arranged between the first sliding bearing and the driving shaft.
4. The test device for the locking hook mechanism according to claim 1, characterized in that: The driving shaft is key-connected with one end of the connecting pull rod, and the driving shaft is perpendicular to the connecting pull rod.
5. The test device for the locking hook mechanism according to claim 1, characterized in that: The second structure is a first self-lubricating spherical plain bearing structure, and the third structure is a second self-lubricating spherical plain bearing structure.
6. The test device for the locking hook mechanism according to claim 5, characterized in that: The first self-lubricating spherical plain bearing structure includes a first pin shaft, a first self-lubricating spherical plain bearing and a first self-lubricating spherical plain bearing support. The first pin shaft is connected with the first self-lubricating spherical plain bearing support. The first self-lubricating spherical plain bearing is rotationally connected with the first pin shaft, and a first gasket is arranged between the first self-lubricating spherical plain bearing and the first pin shaft. The first self-lubricating spherical plain bearing is threadedly connected with one end of the connecting pull rod. The first self-lubricating spherical plain bearing support is arranged at the other end of the driving rod. The second self-lubricating spherical plain bearing structure includes a second pin shaft, a second self-lubricating spherical plain bearing and a second self-lubricating spherical plain bearing support. The second pin shaft is connected with the second self-lubricating spherical plain bearing support. The second self-lubricating spherical plain bearing is rotationally connected with the second pin shaft, and a second gasket is arranged between the second self-lubricating spherical plain bearing and the second pin shaft. The second self-lubricating spherical plain bearing is threadedly connected with the other end of the connecting pull rod. The second self-lubricating spherical plain bearing support is arranged on the locking hook.
7. The test device for the locking hook mechanism according to claim 6, characterized in that: The thread directions of the two ends of the connecting pull rod are opposite, and the distance between the first self-lubricating spherical plain bearing and the second self-lubricating spherical plain bearing is adjusted by rotating the connecting pull rod. A limiting structure for limiting the driving rod is arranged on the bracket.
8. The test device for the locking hook mechanism according to claim 1, characterized in that: One end of the locking hook is fixedly connected with an output shaft, the output shaft is rotationally connected with the bracket, and the second angular displacement sensor is arranged on the output shaft.
9. The test device for the locking hook mechanism according to claim 8, characterized in that: One end of the locking hook is key-connected with the output shaft, the fourth structure is a second sliding bearing, and a second bearing bush is arranged between the second sliding bearing and the output shaft.
10. A test method for a test device using the locking hook mechanism according to any one of claims 1-9, characterized in that: Comprising: When conducting the accuracy verification test of the hook mechanism passing through the center position, calculate the wear amounts of the first structure, the second structure, the third structure, the fourth structure, and the hook of the hook mechanism, establish a digital model for dynamic simulation. Measure the angular displacement of the driving rod after wear through the first angular displacement sensor and measure the angular displacement of the hook after wear through the second angular displacement sensor to realize the theoretical analysis of the influence of a single set of wear materials on the accuracy of the center-locking position of the hook mechanism. Obtain the wear amounts according to the above calculations and analyses, machine the first structure, the second structure, the third structure, the fourth structure, and the hook with corresponding dimensions and shapes, scan the morphologies of the surfaces to be worn of the first structure, the second structure, the third structure, the fourth structure, and the hook, and measure the relevant parameters of the first structure, the second structure, the third structure, the fourth structure, and the hook. Check whether the machined first structure, second structure, third structure, fourth structure, and hook meet the dimensions after wear in the theoretical calculation. Then install the machined first structure, second structure, third structure, fourth structure, and hook at the corresponding positions. When the driving rod rotates to the maximum angular displacement under the action of the driving structure, measure the angular displacements of the driving rod and the hook. Compare and analyze the measured angular displacement data of the driving rod and the hook with the results of the dynamic simulation to complete the verification test of the accuracy of the center-locking position of the hook mechanism; When conducting the wear test of the kinematic pair of the hook mechanism, first machine the first structure, the second structure, the third structure, the fourth structure, and the hook to be tested according to the set materials, scan the morphologies of the surfaces to be worn of the first structure, the second structure, the third structure, the fourth structure, and the hook, and measure the relevant parameters of the first structure, the second structure, the third structure, the fourth structure, and the hook. Install the machined first structure, second structure, third structure, fourth structure, and hook at the corresponding positions. Then conduct the reciprocating wear test of the hook mechanism according to the actual motion law of the cabin door; the driving structure drives the hook mechanism to perform reciprocating motion with a set number of times and a set angular displacement. As the first structure, the second structure, the third structure, the fourth structure, and the hook wear and their sizes change, during the entire reciprocating wear test process, measure the angular displacement of the driving rod through the first angular displacement sensor and measure the angular displacement of the hook through the second angular displacement sensor. According to the angular displacements of the driving shaft and the hook at the end of wear, obtain the center-locking position of the hook mechanism. Then scan the morphologies of the worn surfaces of the first structure, the second structure, the third structure, the fourth structure, and the hook again, and measure the corresponding wear volumes.