Landing gear dynamic loading test device

Abstract

The embodiment of the present application discloses a landing gear dynamic loading test device, which includes: a fixed frame, which is used to initially fix the landing gear, and the fixed frame has a first direction, a second direction and a third direction that are perpendicular to each other; and a dynamic loading assembly, which is fixedly installed in the fixed frame, and the dynamic loading assembly includes: a fixing part, a steering loading unit, a heading loading unit, a side loading unit and a vertical loading unit, the fixing part is used to fix the landing gear, and the fixing part is fixedly connected to the steering loading unit, the heading loading unit is fixedly connected to the steering loading unit, the side loading unit is movably connected to the heading loading unit, and the vertical loading unit is movably connected to the side loading unit. According to the present application, it can accurately simulate the loading conditions of the landing gear during actual use, and effectively improve the accuracy of the test results.

Description

Technical Field

[0001] The present application relates to the technical field of aerospace vehicle landing gear, and in particular to a landing gear dynamic loading test device. Background Art

[0002] To ensure efficient ground operation, the aircraft's landing gear is equipped with a turning mechanism that operates the landing gear, enabling turning maneuvers. During turning, the landing gear and turning mechanism are subject to the operating torque from the drive mechanism and vertical, directional, and lateral loads from the ground. This is a rapid, dynamic process, with parameters such as the forces acting on the landing gear and turning mechanism, as well as the compression of the landing gear buffer, constantly changing.

[0003] Currently, some existing test devices simplify the aforementioned dynamic process, converting it into a static state. Parameters such as turning moment, load, and compression are fixed at one or several values, and then statically tested. This oversimplification of the static verification process can lead to inaccurate verification results, which can easily differ significantly from actual use. Furthermore, while other existing test devices simulate the aforementioned dynamic process, they are limited to simulating ground-based turning moments and are unable to adjust parameters such as landing gear compression in real time. They also ignore the effects of vertical, directional, and lateral loads on the landing gear and steering mechanism, resulting in significant errors in the test results. Therefore, improving the accuracy of test results during aircraft landing gear steering tests has become an urgent issue. Summary of the Invention

[0004] An embodiment of the present application provides a landing gear dynamic loading test device to improve the accuracy of test results during a landing gear steering test of an aircraft.

[0005] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0006] On the one hand, a landing gear dynamic loading test device is provided, which is used to test the landing gear of an aircraft, comprising:

[0007] a fixing frame, which is used to initially fix the landing gear, and the fixing frame has a first direction, a second direction, and a third direction that are perpendicular to each other; and

[0008] A dynamic loading assembly is fixedly installed in the fixed frame, and the dynamic loading assembly includes: a fixing member, a steering loading unit, a heading loading unit, a side loading unit and a vertical loading unit, the fixing member is used to fix the landing gear, and the fixing member is fixedly connected to the steering loading unit, the heading loading unit is arranged along the second direction, and the heading loading unit is fixedly connected to the steering loading unit, the side loading unit is arranged along the first direction, and the side loading unit is movably connected to the heading loading unit, the vertical loading unit is arranged along the third direction, and the vertical loading unit is movably connected to the side loading unit;

[0009] The steering loading unit controls the fixed part to rotate along a rotation direction with the third direction as the axis to dynamically apply a steering torque to the landing gear. The heading loading unit controls the fixed part to move along the second direction to dynamically apply a heading load to the landing gear. The side loading unit controls the fixed part to move along the first direction to dynamically apply a side load to the landing gear. The vertical loading unit controls the fixed part to move along the third direction to dynamically apply a vertical load to the landing gear.

[0010] In addition to or as an alternative to one or more of the features disclosed above, the vertical loading unit includes: a vertical drive, a lifting platform, and a transfer platform, wherein an output end of the vertical drive is transmission-connected to the lifting platform, the lifting platform is disposed above the transfer platform along the third direction, and the lifting platform is fixedly connected to the transfer platform, and the transfer platform is movably connected to the side loading unit;

[0011] Under the action of the vertical driver, the transfer platform dynamically applies a vertical load to the landing gear.

[0012] In addition to one or more of the features disclosed above, or as an alternative, the vertical loading unit also includes: a transmission unit, the transmission unit including: a first transmission member and a second transmission member that are transmission-connected to each other, the first transmission member is transmission-connected to the vertical drive, the extension direction of the second transmission member is parallel to the third direction, and the second transmission member is transmission-connected to the lifting platform.

[0013] In addition to one or more of the features disclosed above, or as an alternative, at least one first load sensor is provided between the lifting platform and the transfer platform.

[0014] The first load sensor is used to sense the vertical load applied by the vertical driver to the landing gear, and the vertical driver adjusts the applied vertical load in real time according to the sensing result of the first load sensor.

[0015] In addition to or as an alternative to one or more of the features disclosed above, the side loading unit includes: a side drive, the side drive is arranged along the first direction, and the side drive is fixedly mounted on the transfer platform; and

[0016] a lateral platform, the lateral platform being movably arranged above the transfer platform along the third direction, and the lateral platform being transmission-connected to the power output end of the lateral drive;

[0017] Under the action of the lateral actuator, the lateral platform dynamically applies a lateral load to the landing gear.

[0018] In addition to or as an alternative to one or more of the features disclosed above, the side loading unit further comprises: a second load sensor, the second load sensor being disposed on the side platform;

[0019] The second load sensor is used to sense the lateral load applied by the lateral actuator to the landing gear, and the lateral actuator adjusts the applied lateral load in real time according to the sensing result of the second load sensor.

[0020] In addition to or as an alternative to one or more of the features disclosed above, the heading loading unit includes: a heading drive, the heading drive is arranged along the second direction, and the heading drive is fixedly installed on the lateral platform; and

[0021] A heading platform, which is movably arranged above the lateral platform along the third direction, and the heading platform is transmission-connected to the power output end of the heading drive;

[0022] Under the action of the heading driver, the heading platform dynamically applies a heading load to the landing gear.

[0023] In addition to or as an alternative to one or more of the features disclosed above, the heading loading unit further comprises: a third load sensor, the third load sensor being disposed on the heading platform;

[0024] The third load sensor is used to sense the heading load applied by the heading driver to the landing gear, and the heading driver adjusts the applied heading load in real time according to the sensing result of the third load sensor.

[0025] In addition to or as an alternative to one or more of the features disclosed above, the steering loading unit includes: a steering drive arranged along a third direction, and the steering drive is fixedly mounted on the heading platform; and

[0026] a steering joint, the extension direction of which is parallel to the third direction, the steering joint being arranged above the steering actuator along the third direction, one end of the steering joint being transmission-connected to the power output end of the steering actuator, and the other end of the steering joint being fixedly connected to a fixing member;

[0027] Under the action of the steering actuator, the steering joint dynamically applies a steering torque to the landing gear.

[0028] In addition to or as an alternative to one or more of the features disclosed above, the steering loading unit further comprises: a fourth load sensor, the fourth load sensor being disposed on the steering joint;

[0029] The fourth load sensor is used to sense the steering torque applied by the steering driver to the landing gear, and the heading driver adjusts the applied steering torque in real time according to the sensing result of the fourth load sensor.

[0030] In addition to one or more of the features disclosed above, or as an alternative, the dynamic loading assembly further includes: a fixed bracket, which is fixedly mounted in a fixed frame, and a first guide rail member is fixedly mounted on the fixed bracket, the first guide rail member is arranged along a third direction, and the lifting platform and the transfer platform are both fixedly connected to the movable part of the first guide rail member.

[0031] One of the above-mentioned technical solutions has the following advantages or beneficial effects: In this application, the landing gear is steered by the steering loading unit to dynamically apply a steering torque to the landing gear, the heading load is dynamically applied to the landing gear by the heading loading unit, the side load is dynamically applied to the landing gear by the side loading unit, and the vertical load is dynamically applied to the landing gear. This decouples the forces and torques experienced by the landing gear during actual turning into multiple loads, such as steering torque, vertical load, heading load, and side load. This facilitates loading control and feedback by the test apparatus, thereby meeting the loading requirements of multiple loads, such as steering torque, vertical load, heading load, and side load, experienced by the landing gear in actual use. Furthermore, the steering torque, vertical load, heading load, and side load experienced by the landing gear are dynamically adjusted according to actual conditions, thereby accurately simulating the loading conditions experienced by the landing gear in actual use and effectively improving the accuracy of the test results. Furthermore, this application has a simple and compact structure and comprehensive functions, making it easy to conduct landing gear tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0033] Figure 1is a three-dimensional structural view of a landing gear dynamic loading test device provided according to an embodiment of the present application;

[0034] Figure 2 1 is a schematic diagram of an explosion of a landing gear dynamic loading test device provided according to an embodiment of the present application;

[0035] Figure 3 This is a three-dimensional structural view of a dynamic loading component provided according to an embodiment of the present application;

[0036] Figure 4 is an exploded schematic diagram of a dynamic loading assembly provided according to an embodiment of the present application;

[0037] Figure 5 1 is a structural diagram of a heading loading unit and a side loading unit provided according to an embodiment of the present application;

[0038] Figure 6 It is a structural schematic diagram of a vertical loading unit provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for the purpose of explaining this application and are not intended to limit this application.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] Currently, some existing test devices simplify the above-mentioned dynamic process, that is, simplify the dynamic process into a static state, fix parameters such as turning moment, load, and compression at one or several values, and conduct static test verification. Due to the excessive simplification of the static verification process, the verification results are not true, and it is easy for the test results to differ greatly from the actual use results. For example, the static test life of the nose landing gear of a domestic aircraft exceeded 300,000 turning cycles. However, after 3,000 turning cycles in actual use, problems such as cracks at the root of the turning actuator connecting ear and leakage of the turning actuator appeared. The static test verification life result was seriously inconsistent with the actual life. Secondly, although another part of the existing test devices simulates the above-mentioned dynamic process, the existing test devices are limited to simulating the turning moment from the ground and cannot adjust parameters such as the compression of the landing gear in real time. They also ignore the effects of vertical, heading, and lateral loads on the landing gear and turning mechanism, and the test results also have large errors.

[0044] In order to solve the above problems, the embodiment of the present application provides a landing gear dynamic loading test device 100 for testing an aircraft landing gear 200. Figures 1 to 6 FIG. 1 shows a structural schematic diagram of a landing gear dynamic loading test device 100 .

[0045] In the embodiments of the present application, Figures 1 to 6As shown, the landing gear dynamic loading test device 100 is used to test the landing gear 200 of an aircraft, and may include: a fixed frame 110, which is used to initially fix the landing gear 200, and the fixed frame 110 has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other; and a dynamic loading assembly 120, which is fixedly installed in the fixed frame 110, and the dynamic loading assembly 120 includes: a fixing member 121, a steering loading unit 122, a heading loading unit 123, a side loading unit 124 and a vertical loading unit 125. The fixing member 121 is used to fix the landing gear 200, and the fixing member 121 is fixedly connected to the steering loading unit 122. The heading loading unit 123 is arranged along the second direction Y and fixedly connected to the steering loading unit 122. The side loading unit 124 is arranged along the first direction X and movably connected to the heading loading unit 123. The vertical loading unit 125 is arranged along the third direction Z and movably connected to the side loading unit 124.

[0046] Specifically, when it is necessary to test the landing gear 200 of the aircraft, one end of the landing gear 200 is first preliminarily fixedly installed in the fixed frame 110, and the other end of the landing gear 200 is fixedly connected to the fixing member 121. The steering loading unit 122 controls the fixing member 121 to rotate along a rotation direction with the third direction Z as the axis to synchronously drive the landing gear 200 to rotate along a rotation direction with the third direction Z as the axis, thereby dynamically applying a steering torque to the landing gear 200. The heading loading unit 123 controls the fixing member 121 to move along the second direction Y to synchronously control the landing gear 200 to move along the second direction Y, thereby dynamically applying a heading load to the landing gear 200. The side loading unit 124 controls the fixing member 121 to move along the first direction X to synchronously control the landing gear 200 to move along the first direction X, thereby dynamically applying a heading load to the landing gear 200. The vertical loading unit 125 controls the fixing member 121 to move along the third direction Z to compress the landing gear 200 and dynamically apply a vertical load to the landing gear 200, thereby decoupling the forces and moments applied to the landing gear during an actual turning process into multiple loads such as steering moment, vertical load, heading load, and side load. This facilitates loading control and feedback by the test device, thereby meeting the loading requirements of multiple loads such as steering moment, vertical load, heading load, and side load applied to the landing gear during actual use, and dynamically adjusting the steering moment, vertical load, heading load, and side load applied to the landing gear according to actual conditions, thereby accurately simulating the loading conditions of the landing gear during actual use and effectively improving the accuracy of the test results. At the same time, the present application has a simple and compact structure, comprehensive functions, and is easy to carry out landing gear tests.

[0047] In a preferred embodiment of the present application, Figures 1 to 4 As shown, the fixing part 121, the steering loading unit 122, the heading loading unit 123, the side loading unit 124 and the vertical loading unit 125 are sequentially arranged in a stacked manner along the third direction Z, so as to make the overall structure compact and reduce the overall footprint of the landing gear dynamic loading test device 100.

[0048] In the embodiments of the present application, Figure 6 As shown, the vertical loading unit 125 includes: a vertical driver 1251, a lifting platform 1253 and a transfer platform 1254. The output end of the vertical driver 1251 is transmission-connected to the lifting platform 1253. The lifting platform 1253 is arranged above the transfer platform 1254 along the third direction Z, and the lifting platform 1253 is fixedly connected to the transfer platform 1254. The transfer platform 1254 is movably connected to the side loading unit 124. Under the action of the vertical driver 1251, the transfer platform 1254 dynamically applies a vertical load to the landing gear 200.

[0049] The vertical driver 1251 is a servo drive motor, which is easy to obtain and reduces costs.

[0050] Specifically, the vertical driver 1251 drives the lifting platform 1253 to approach or move away from the fixing part 121 along the third direction Z, and then controls the transfer platform 1254 to approach or move away from the fixing part 121, so as to control the fixing part 121 to apply a dynamic vertical load to the landing gear 200, and control the compression or stretching of the landing gear 200, so as to accurately simulate the vertical loading condition of the landing gear 200 in actual use, thereby improving the accuracy of the test results.

[0051] In the embodiments of the present application, Figure 6 As shown, the vertical loading unit 125 also includes: a transmission unit 1252, and the transmission unit 1252 includes: a first transmission member 12521 and a second transmission member 12522 that are transmission-connected to each other, the first transmission member 12521 is transmission-connected to the vertical driver 1251, the extension direction of the second transmission member 12522 is parallel to the third direction Z, and the second transmission member 12522 is transmission-connected to the lifting platform 1253.

[0052] Among them, the "first" and "second" in the first transmission member 12521 and the second transmission member 12522 are only for distinguishing different transmission members, and do not limit the number or order of the transmission members.

[0053] The transmission unit 1252 is a worm gear transmission structure, for example, the first transmission member 12521 is a worm gear, and the second transmission member 12522 is a worm gear, so as to efficiently realize the transmission connection between the first transmission member 12521 and the second transmission member 12522.

[0054] It can be understood that the vertical driver 1251 drives the first transmission member 12521 to move, and then controls the lifting platform 1253 to approach or move away from the fixed member 121 along the third direction Z through the cooperation between the first transmission member 12521 and the second transmission member 12522, and then controls the transfer platform 1254 to approach or move away from the fixed member 121, so as to control the fixed member 121 to apply a dynamic vertical load to the landing gear 200, and control the compression or stretching of the landing gear 200, so as to accurately simulate the vertical loading condition of the landing gear 200 in actual use, and improve the accuracy of the test results.

[0055] In the embodiments of the present application, Figures 3 to 6 As shown, the dynamic loading assembly 120 also includes: a fixed bracket 126, the fixed bracket 126 is fixedly installed in the fixed frame 110, and a first guide rail member 1256 is fixedly installed on the fixed bracket 126, the first guide rail member 1256 is arranged along the third direction Z, and the lifting platform 1253 and the transfer platform 1254 are both fixedly connected to the movable part of the first guide rail member 1256.

[0056] The “first” in the first guide rail component 1256 is only used to distinguish different guide rail components, and does not limit the number or order of the guide rail components.

[0057] It can be understood that in the present application, a first guide rail member 1256 is provided on the fixed bracket 126, and the moving direction of the lifting platform 1253 and the transfer platform 1254 is limited by the first guide rail member 1256, so that the lifting platform 1253 and the transfer platform 1254 can accurately apply a vertical load to the landing gear 200, thereby improving the accuracy of the test results.

[0058] In the embodiments of the present application, Figure 6 As shown, at least one first load sensor 1255 is arranged between the lifting platform 1253 and the transfer platform 1254. The first load sensor 1255 is used to sense the vertical load applied by the vertical driver 1251 to the landing gear 200. The vertical driver 1251 adjusts the applied vertical load in real time according to the sensing result of the first load sensor 1255.

[0059] The “first” in the first load sensor 1255 is only used to distinguish different load sensors, and does not limit the number or order of the load sensors.

[0060] In a preferred embodiment of the present application, the landing gear dynamic loading test device 100 further includes: a controller, which is wirelessly connected to the first load sensor 1255 and the vertical driver 1251 respectively.

[0061] Specifically, the controller can be a conventional product or a conventional control chip or other conventional products that can realize the control function in this application. There is no specific limitation in this application. The control chip is installed inside the fixed frame 10.

[0062] When the first load sensor 1255 senses the vertical load applied to the landing gear 200 by the vertical actuator 1251, the first load sensor sends a sensing signal to the controller. After receiving the sensing signal, the controller sends a control instruction to the vertical actuator 1251 based on the sensing result to control the vertical actuator 1251 to adjust the applied vertical load in real time, so as to accurately simulate the vertical loading condition of the landing gear 200 in actual use and improve the accuracy of the test results.

[0063] In the embodiments of the present application, Figures 3 to 5 As shown, the lateral loading unit 124 includes: a lateral driver 1241, which is arranged along a first direction X and is fixedly mounted on a transfer platform 1254; and a lateral platform 1242, which is movably arranged above the transfer platform 1254 along a third direction Z and is transmission-connected to a power output end of the lateral driver 1241; under the action of the lateral driver 1241, the lateral platform 1242 dynamically applies a lateral load to the landing gear 200.

[0064] Wherein, the lateral driver 1241 is a push-pull cylinder.

[0065] It can be understood that the lateral driver 1241 drives the lateral platform 1242 to reciprocate along the first direction X, thereby controlling the fixing member 121 to reciprocate along the first direction X, so as to control the fixing member 121 to apply a dynamic lateral load to the landing gear 200, so as to accurately simulate the lateral loading condition of the landing gear 200 in actual use, thereby improving the accuracy of the test results.

[0066] In a preferred embodiment of the present application, a second guide rail member 1243 is arranged between the lateral platform 1242 and the transfer platform 1254, the extension direction of the second guide rail member 1243 is parallel to the first direction X, and the lateral platform 1242 is fixedly connected to the movable part of the second guide rail member 1243.

[0067] The "second" in the second guide rail component 1243 is only used to distinguish different guide rail components, and it does not limit the number or order of the guide rail components.

[0068] In the present application, the second guide rail member 1243 is used to limit the moving direction of the lateral platform 1242 so that the lateral platform 1242 can accurately apply the lateral load to the landing gear 200, thereby improving the accuracy of the test results.

[0069] In an embodiment of the present application, the lateral loading unit 124 also includes: a second load sensor, which is arranged on the lateral platform 1242; the second load sensor is used to sense the lateral load applied by the lateral driver 1241 to the landing gear 200, and the lateral driver 1241 adjusts the applied lateral load in real time according to the sensing result of the second load sensor.

[0070] The “second” in the second load sensor is only used to distinguish different load sensors, and does not limit the number or order of the load sensors.

[0071] Specifically, the second load sensor and the lateral driver 1241 are both wirelessly connected to the controller.

[0072] When the second load sensor senses the lateral load applied to the landing gear 200 by the lateral driver 1241, the second load sensor sends a sensing signal to the controller. After receiving the sensing signal, the controller sends a control instruction to the lateral driver 1241 according to the sensing result, so as to control the lateral driver 1241 to adjust the applied lateral load in real time, so as to accurately simulate the lateral load condition of the landing gear 200 in actual use, thereby improving the accuracy of the test results.

[0073] In the embodiments of the present application, Figures 3 to 5 As shown, the heading loading unit 123 includes: a heading driver 1231, which is arranged along the second direction Y and is fixedly installed on the lateral platform 1242; and a heading platform 1232, which is movably arranged above the lateral platform 1242 along the third direction Z, and the heading platform 1232 is transmission-connected to the power output end of the heading driver 1231; under the action of the heading driver 1231, the heading platform 1232 dynamically applies a heading load to the landing gear 200.

[0074] The heading driver 1231 is a push-pull cylinder.

[0075] It can be understood that the heading driver 1231 drives the heading platform 1232 to reciprocate along the second direction Y, thereby controlling the fixing member 121 to reciprocate along the second direction Y, so as to control the fixing member 121 to apply a dynamic heading load to the landing gear 200, so as to accurately simulate the heading load condition of the landing gear 200 in actual use, thereby improving the accuracy of the test results.

[0076] In a preferred embodiment of the present application, a third guide rail member 1233 is arranged between the lateral platform 1242 and the navigation platform 1232, the extension direction of the third guide rail member 1233 is parallel to the second direction Y, and the navigation platform 1232 is fixedly connected to the movable part of the third guide rail member 1233.

[0077] The "third" in the third guide rail component 1233 is only used to distinguish different guide rail components, and it does not limit the number or order of the guide rail components.

[0078] In the present application, the third guide rail member 1233 is used to limit the movable direction of the heading platform 1232 so that the heading platform 1232 can accurately apply the heading load to the landing gear 200, thereby improving the accuracy of the test results.

[0079] In an embodiment of the present application, the heading loading unit 123 also includes: a third load sensor, which is arranged on the heading platform 1232; the third load sensor is used to sense the heading load applied by the heading driver 1231 to the landing gear 200, and the heading driver 1231 adjusts the applied heading load in real time according to the sensing result of the third load sensor.

[0080] The “third” in the third load sensor is only for distinguishing different load sensors, and does not limit the number or order of the load sensors.

[0081] Specifically, the third load sensor and the heading driver 1231 are both wirelessly connected to the controller.

[0082] When the third load sensor senses the yaw load applied to the landing gear 200 by the yaw actuator 1231, the third load sensor sends a sensing signal to the controller. After receiving the sensing signal, the controller sends a control instruction to the yaw actuator 1231 based on the sensing result, so as to control the yaw actuator 1231 to adjust the applied yaw load in real time, thereby accurately simulating the yaw load condition of the landing gear 200 in actual use and improving the accuracy of the test results.

[0083] In the embodiments of the present application, Figures 3 and 4As shown, the steering loading unit 122 includes: a steering driver 1221, which is arranged along the third direction Z, and the steering driver 1221 is fixedly installed on the heading platform 1232; and a steering joint 1222, whose extension direction is parallel to the third direction Z, the steering joint 1222 is arranged above the steering driver 1221 along the third direction Z, and one end of the steering joint 1222 is transmission-connected to the power output end of the steering driver 1221, and the other end of the steering joint 1222 is fixedly connected to the fixing member 121; under the action of the steering driver 1221, the steering joint 1222 dynamically applies a steering torque to the landing gear 200.

[0084] Wherein, the steering driver 1221 is a hysteresis damper.

[0085] The steering driver 1221 and the steering joint 1222 are coaxially arranged along the third direction Z, so that the steering driver 1221 drives the steering joint 1222 to rotate.

[0086] In this application, a gear transmission assembly may be provided on the steering driver 1221 and the steering joint 1222 according to the requirement of the steering torque to realize the transmission between the steering driver 1221 and the steering joint 1222 .

[0087] It can be understood that the steering driver 1221 drives the steering joint 1222 to rotate along a rotation direction with the third direction Z as the axis, thereby controlling the fixing member 121 to rotate along a rotation direction with the third direction Z as the axis, so as to control the fixing member 121 to apply a dynamic steering torque to the landing gear 200, so as to accurately simulate the load condition of the landing gear 200 during steering in actual use, thereby improving the accuracy of the test results.

[0088] In a preferred embodiment of the present application, a first avoidance groove 12421 is provided in the central area of ​​the lateral platform 1242, and a second avoidance groove 12321 is provided in the central area of ​​the heading platform 1232. The first avoidance groove 12421 and the second avoidance groove 12321 are coaxially arranged along the third direction Z, and the steering drive 1221 is located in the first avoidance groove 12421 and the second avoidance groove 12321, so as to make the overall structure more compact and further reduce the space occupied by the overall device.

[0089] Among them, the "first" and "second" in the first avoidance groove 12421 and the second avoidance groove 12321 are only for distinguishing different avoidance grooves, and do not limit the number or order of the avoidance grooves.

[0090] In an embodiment of the present application, the steering loading unit 122 also includes: a fourth load sensor, which is arranged on the steering joint 1222; the fourth load sensor is used to sense the steering torque applied by the steering driver 1221 to the landing gear 200, and the heading driver 1231 adjusts the applied steering torque in real time according to the sensing result of the fourth load sensor.

[0091] The “fourth” in the fourth load sensor is only for distinguishing different load sensors, and does not limit the number or order of the load sensors.

[0092] Specifically, the fourth load sensor and the steering driver 1221 are both wirelessly connected to the controller.

[0093] When the fourth load sensor senses the steering torque applied by the steering driver 1221 to the landing gear 200, the fourth load sensor sends a sensing signal to the controller. After receiving the sensing signal, the controller sends a control instruction to the steering driver 1221 based on the sensing result to control the steering driver 1221 to adjust the applied steering torque in real time, so as to accurately simulate the loading condition of the steering torque of the landing gear 200 in actual use and improve the accuracy of the test results.

[0094] In summary, in the present application, the landing gear is steered by the steering loading unit to dynamically apply a steering torque to the landing gear, the heading load is dynamically applied to the landing gear by the heading loading unit, the side load is dynamically applied to the landing gear by the side loading unit, and the vertical load is dynamically applied to the landing gear, so as to decouple the forces and torques applied to the landing gear during actual turning into multiple loads such as steering torque, vertical load, heading load, and side load, thereby facilitating loading control and feedback by the test apparatus, thereby meeting the loading requirements of multiple loads such as steering torque, vertical load, heading load, and side load applied to the landing gear in actual use, and dynamically adjusting the steering torque, vertical load, heading load, and side load applied to the landing gear according to actual conditions, thereby accurately simulating the loading conditions of the landing gear in actual use and effectively improving the accuracy of the test results. At the same time, the present application has a simple and compact structure, comprehensive functions, and is easy to conduct landing gear tests.

[0095] The above steps are merely provided to help understand the method, structure, and core concept of the present application. A person skilled in the art may make several improvements and modifications to the present application without departing from the principles of the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A landing gear dynamic loading test device, used for testing aircraft landing gear, characterized by: include: a fixing frame, which is used to initially fix the landing gear, and the fixing frame has a first direction, a second direction, and a third direction that are perpendicular to each other; and A dynamic loading assembly is fixedly installed in the fixed frame, and the dynamic loading assembly includes: a fixing member, a steering loading unit, a heading loading unit, a side loading unit and a vertical loading unit, the fixing member is used to fix the landing gear, and the fixing member is fixedly connected to the steering loading unit, the heading loading unit is arranged along the second direction, and the heading loading unit is fixedly connected to the steering loading unit, the side loading unit is arranged along the first direction, and the side loading unit is movably connected to the heading loading unit, the vertical loading unit is arranged along the third direction, and the vertical loading unit is movably connected to the side loading unit; The steering loading unit controls the fixed part to rotate along a rotation direction with the third direction as the axis to dynamically apply a steering torque to the landing gear. The heading loading unit controls the fixed part to move along the second direction to dynamically apply a heading load to the landing gear. The side loading unit controls the fixed part to move along the first direction to dynamically apply a side load to the landing gear. The vertical loading unit controls the fixed part to move along the third direction to dynamically apply a vertical load to the landing gear.

2. The landing gear dynamic loading test device according to claim 1, characterized in that: The vertical loading unit includes: a vertical driver, a lifting platform and a transfer platform, the output end of the vertical driver is transmission-connected to the lifting platform, the lifting platform is arranged above the transfer platform along the third direction, and the lifting platform is fixedly connected to the transfer platform, and the transfer platform is movably connected to the side loading unit; Under the action of the vertical driver, the transfer platform dynamically applies a vertical load to the landing gear.

3. The landing gear dynamic loading test device according to claim 2, characterized in that: The vertical loading unit also includes: a transmission unit, which includes: a first transmission member and a second transmission member that are transmission-connected to each other, the first transmission member is transmission-connected to the vertical driver, the extension direction of the second transmission member is parallel to the third direction, and the second transmission member is transmission-connected to the lifting platform.

4. The landing gear dynamic loading test device according to claim 2, characterized in that: At least one first load sensor is provided between the lifting platform and the transfer platform. The first load sensor is used to sense the vertical load applied by the vertical driver to the landing gear, and the vertical driver adjusts the applied vertical load in real time according to the sensing result of the first load sensor.

5. The landing gear dynamic loading test device according to claim 2, characterized in that: The side loading unit includes: a side driver, the side driver is arranged along a first direction, and the side driver is fixedly installed on the transfer platform; and a lateral platform, the lateral platform being movably arranged above the transfer platform along the third direction, and the lateral platform being transmission-connected to the power output end of the lateral drive; Under the action of the lateral actuator, the lateral platform dynamically applies a lateral load to the landing gear.

6. The landing gear dynamic loading test device according to claim 5, characterized in that: The side loading unit further includes: a second load sensor, the second load sensor being disposed on the side platform; The second load sensor is used to sense the lateral load applied by the lateral actuator to the landing gear, and the lateral actuator adjusts the applied lateral load in real time according to the sensing result of the second load sensor.

7. The landing gear dynamic loading test device according to claim 5, characterized in that: The heading loading unit includes: a heading driver, the heading driver is arranged along the second direction, and the heading driver is fixedly installed on the lateral platform; and A heading platform, which is movably arranged above the lateral platform along the third direction, and the heading platform is transmission-connected to the power output end of the heading drive; Under the action of the heading driver, the heading platform dynamically applies a heading load to the landing gear.

8. The landing gear dynamic loading test device according to claim 7, characterized in that: The heading loading unit further includes: a third load sensor, wherein the third load sensor is arranged on the heading platform; The third load sensor is used to sense the heading load applied by the heading driver to the landing gear, and the heading driver adjusts the applied heading load in real time according to the sensing result of the third load sensor.

9. The landing gear dynamic loading test device according to claim 7, characterized in that: The steering loading unit includes: a steering driver arranged along a third direction, and the steering driver is fixedly installed on the heading platform; and a steering joint, the extension direction of which is parallel to the third direction, the steering joint being arranged above the steering actuator along the third direction, one end of the steering joint being transmission-connected to the power output end of the steering actuator, and the other end of the steering joint being fixedly connected to a fixing member; Under the action of the steering actuator, the steering joint dynamically applies a steering torque to the landing gear.

10. The landing gear dynamic loading test device according to claim 9, characterized in that: The steering loading unit further includes: a fourth load sensor, wherein the fourth load sensor is arranged on the steering joint; The fourth load sensor is used to sense the steering torque applied by the steering driver to the landing gear, and the heading driver adjusts the applied steering torque in real time according to the sensing result of the fourth load sensor.

11. The landing gear dynamic loading test device according to claim 2, characterized in that: The dynamic loading assembly also includes: a fixed bracket, which is fixedly installed in a fixed frame, and a first guide rail member is fixedly installed on the fixed bracket. The first guide rail member is arranged along a third direction, and the lifting platform and the transfer platform are both fixedly connected to the movable part of the first guide rail member.

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