Fatigue test loading device of main landing gear

Abstract

The utility model provides a fatigue test loading device for a main undercarriage, and relates to the technical field of airplane component detection, and the fatigue test loading device is characterized in that: 1) a driving device is arranged to drive an upper seat to slide up and down along a stand column, and the load on the main undercarriage is adjusted through the extrusion of an upper workbench and a lower workbench on the main undercarriage; (2) by arranging a first sliding plate sliding in the rolling direction of the airplane wheels, the sliding landing load of the main landing gear and the sliding load of the main landing gear can be simulated; a second sliding plate sliding in the direction perpendicular to the rolling direction of the airplane wheels is arranged and matched with a motor to drive the airplane wheels to turn, and the turning load of the main landing gear can be simulated; (4) airplane wheel braking is controlled through a control piece, and the braking load of the main landing gear can be simulated; the fatigue test loading device is provided with a plurality of load test conditions, improves the test efficiency, and is convenient for workers to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft component detection, and particularly to a fatigue test loading device of main landing gear. BACKGROUND

[0002] The fatigue test of main landing gear is to verify the durability and reliability of landing gear under simulated actual use conditions. The fatigue test of main landing gear needs to simulate the periodic loading process of multi-state loads in multiple states, and this complexity requires the test system to simulate various load conditions. In the prior art, the test equipment can only simulate a single load condition of the landing gear. When measuring the performance of the landing gear under multiple loads, the landing gear needs to be transferred multiple times, which is low in efficiency and inconvenient for workers to use. SUMMARY

[0003] The utility model discloses to the purpose that in the prior art, a fatigue test loading device of main landing gear is provided, which can set multiple load test conditions on the loading device, improve test efficiency, and facilitate workers to use.

[0004] To achieve the above purpose, the utility model adopts the technical scheme as follows:

[0005] The utility model provides a kind of fatigue test loading device of main landing gear, including column and the upper seat of being set on the column, the lower seat is correspondingly provided in the lower of the upper seat, the bottom of the upper seat is connected with upper workbench, and the upper workbench is used to fix main landing gear, and the top of the lower seat is provided with lower workbench;

[0006] Driving device is provided on the column, and the driving device is used to drive the upper seat to slide up and down along the column, so that the wheel of the main landing gear and the lower workbench contact or separate;

[0007] The lower workbench includes first sliding plate, and the first sliding plate and the lower seat are connected by first sliding structure, and the first sliding structure includes driving part, and the driving part is used to drive the first sliding plate to slide relative to the lower seat along the rolling direction of the wheel.

[0008] Optionally, the upper workbench fixes the main landing gear by mounting frame, and the mounting frame is connected with the main support rod and the inclined support rod of the main landing gear respectively;

[0009] Buffer structure is provided between the mounting frame and the upper workbench.

[0010] Pressure detection device is provided on the lower workbench.

[0011] Optionally, control device is further provided on the mounting frame, and the control device is used to control the wheel to turn or brake.

[0012] Optionally, the control device comprises a rotating member hinged to the main shaft of the main landing gear, the rotating member is connected to an electric motor, the electric motor drives the main shaft to rotate through the electric motor, and the electric motor is fixed to the inside of the mounting frame through a motor frame.

[0013] Optionally, the control device further comprises a control member connected to the brake disc of the wheel, and the control member is used to drive the wheel to brake or rotate normally.

[0014] Optionally, the first sliding structure comprises a plurality of first sliding blocks arranged at the bottom of the first sliding plate, the first sliding blocks extend along the rolling direction of the wheel, and the top of the lower seat is provided with a first sliding groove matched with the width of the first sliding blocks; the first sliding blocks are arranged in the first sliding groove and slide to drive the first sliding plate to slide relative to the lower seat.

[0015] One end of at least one first sliding groove is provided with a stop block, and the corresponding first sliding block is provided with a groove towards the end of the stop block; the driving member is a telescopic rod arranged between the groove and the stop block.

[0016] Optionally, the lower working table further comprises a second sliding plate arranged on the first sliding plate, and a second sliding structure is arranged between the second sliding plate and the first sliding plate to enable the second sliding plate to slide along a direction perpendicular to the sliding direction of the first sliding plate.

[0017] Optionally, the second sliding structure comprises a plurality of second sliding grooves arranged at the bottom of the second sliding plate, the second sliding grooves are arranged perpendicular to the rolling direction of the wheel, and the top of the first sliding plate is provided with a second sliding block matched with the second sliding grooves; the second sliding block is arranged in the second sliding groove and slides to drive the second sliding plate to slide relative to the first sliding plate.

[0018] The two ends of the second sliding groove are respectively provided with stop blocks.

[0019] The fatigue test loading device for the main landing gear has the following beneficial effects: 1) the driving device is arranged to drive the upper seat to slide up and down along the stand, the upper working table and the lower working table are arranged to press the main landing gear, and the load on the main landing gear is adjusted; 2) the first sliding plate is arranged to slide along the rolling direction of the wheel, the sliding landing load of the main landing gear and the sliding load of the main landing gear can be simulated; 3) the second sliding plate is arranged to slide along a direction perpendicular to the rolling direction of the wheel, and the turning load of the main landing gear can be simulated by cooperating with the motor to drive the wheel to turn; 4) the control member is arranged to control the wheel brake, and the brake load of the main landing gear can be simulated; the fatigue test loading device is provided with multiple load test conditions, the test efficiency is improved, and the staff can use the fatigue test loading device conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 A structural schematic diagram of a fatigue test loading device of a main landing gear provided by the embodiments of the present application is shown in the figure.

[0022] Figure 2 A structural schematic diagram of an upper seat provided by the embodiments of the present application is shown in the figure.

[0023] Figure 3 A structural schematic diagram of a lower seat provided by the embodiments of the present application is shown in the figure.

[0024] Figure 4 A structural schematic diagram of a second sliding plate provided by the embodiments of the present application is shown in the figure.

[0025] Figure legend: 10, upper seat; 110, upper workbench; 120, fixing frame; 121, rotating piece; 122, motor; 20, lower seat; 201, first sliding groove; 202, telescopic rod; 210, first sliding plate; 211, first sliding block; 212, second sliding block; 220, second sliding plate; 221, second sliding groove; 230, detection frame; 231, detection head; 30, main support rod; 310, wheel; 320, main shaft; 330, inclined support rod. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. It should be noted that the various features in the embodiments of the present application can be combined with each other without conflict, and the combined embodiments are still within the protection scope of the present application.

[0027] The fatigue test of the main landing gear is to verify the durability and reliability of the landing gear under the simulated actual use conditions. The fatigue test of the main landing gear needs to simulate the periodic loading process of multiple state loads in multiple states, and the complexity requires the test system to simulate various load conditions. In the prior art, the test equipment can only simulate a single load condition of the landing gear, and when measuring the performance of the landing gear under multiple loads, the landing gear needs to be transferred multiple times, which is low in efficiency and inconvenient for the staff to use. To solve the above problems, the embodiment of the present application provides a fatigue test loading device for a main landing gear, which can set multiple load test conditions on the loading device, improve the test efficiency, and facilitate the staff to use.

[0028] As shown in Figure 1 , the embodiment 1 of the present application provides a fatigue test loading device for a main landing gear, which comprises a column and an upper seat 10 arranged on the column. A lower seat 20 is arranged below the upper seat 10. The bottom of the upper seat 10 is connected with an upper workbench 110, which is used to fix the main landing gear. The top of the lower seat 20 is provided with a lower workbench. A driving device is arranged on the column, which is used to drive the upper seat 10 to slide up and down along the column, so that the wheel 310 of the main landing gear and the lower workbench are in contact or separated. The lower workbench comprises a first sliding plate 210, which is connected with the lower seat 20 through a first sliding structure. The first sliding structure comprises a driving member, which is used to drive the first sliding plate 210 to slide along the rolling direction of the wheel 310 relative to the lower seat 20. The driving device is arranged to drive the upper seat 10 to slide up and down along the column. The upper workbench 110 and the lower workbench form a compression on the main landing gear. The degree of downward sliding of the upper seat 10 by the driving device adjusts the load size of the main landing gear. In addition, by arranging the first sliding plate 210 which slides along the rolling direction of the wheel 310, the sliding landing load of the main landing gear and the sliding load of the main landing gear can be simulated, and multiple load test conditions are formed in the same fatigue test loading device.

[0029] Specifically, as shown in Figure 2 , the upper workbench 110 fixes the main landing gear through a mounting bracket 120, and the mounting bracket 120 is connected with the main support rod 30 and the inclined support rod 330 of the main landing gear respectively. A buffer structure is arranged between the mounting bracket 120 and the upper workbench 110. A pressure detection device is arranged on the lower workbench. In order to avoid damage to the upper workbench 110, the buffer structure can be arranged between the mounting bracket 120 and the upper workbench 110, and the load of the main landing gear is detected by the pressure detection device.

[0030] Specifically, the mounting bracket 120 is further provided with a control device, which is used to control the turning or braking of the wheel 310.

[0031] Specifically, as shown in Figure 1As shown, the control device includes a rotating component 121 hinged to the main shaft 320 of the main landing gear. The rotating component 121 is connected to a motor 122 to drive the main shaft 320 to rotate, thereby causing the wheel 310 to turn. The motor 122 is fixed inside the mounting frame 120 by a motor frame.

[0032] Specifically, the control device also includes a control component connected to the brake disc of the wheel 310, which is used to drive the wheel 310 to brake or rotate normally. In this embodiment, the control component controls the braking of the wheel 310, simulating the braking load of the main landing gear.

[0033] Specifically, such as Figure 3 As shown, the first sliding structure includes a plurality of first sliders 211 disposed at the bottom of the first slide plate 210. The first sliders 211 extend along the rolling direction of the wheel 310. The top of the lower seat 20 is provided with a first groove 201 matching the width of the first sliders 211. The first sliders 211 slide in the first groove 201 to drive the first slide plate 210 to slide relative to the lower seat 20. At least one end of the first groove 201 is provided with a stop, and the corresponding first slider 211 is provided with a groove facing the stop. The driving component is a telescopic rod 202, which is disposed between the groove and the stop. In this embodiment, two telescopic rods 202 are provided.

[0034] Specifically, such as Figure 4 As shown, the lower worktable also includes a second slide plate 220 disposed on the first slide plate 210. A second sliding structure is provided between the second slide plate 220 and the first slide plate 210 to allow the second slide plate 220 to slide in a direction perpendicular to the sliding direction of the first slide plate 210. In this embodiment, by providing a second slide plate 220 that slides perpendicular to the rolling direction of the wheel 310, when the wheel 310 contacts the second slide plate 220, the motor 122 drives the wheel 310 to turn, and the second slide plate 220 slides, which can simulate the turning load of the main landing gear.

[0035] Specifically, the second sliding structure includes a plurality of second sliding grooves 221 disposed at the bottom of the second sliding plate 220. The second sliding grooves 221 are disposed perpendicular to the rolling direction of the wheel 310. The top of the first sliding plate 210 is provided with a second slider 212 that matches the second sliding groove 221. The second slider 212 is placed in the second sliding groove 221 and slides to drive the second sliding plate 220 to slide relative to the first sliding plate 210. Stops are respectively provided at both ends of the second sliding groove 221.

[0036] The working principle and use flow of the embodiment of the application are as follows: the main landing gear is fixed on the upper workbench 110, the main support rod 30 and the inclined support rod 330 of the main landing gear are connected through the mounting frame 120, the upper seat 10 is driven to slide up and down along the stand through the driving device, the wheel 310 of the main landing gear is in contact with or separated from the lower workbench, and the landing and take-off state of the landing gear is simulated. The upper workbench 110 and the lower workbench are used to press the main landing gear by adjusting the sliding degree of the upper seat 10, so that the load size of the main landing gear is adjusted. The first sliding plate 210 is used to slide along the rolling direction of the wheel 310, the sliding landing load and the sliding load of the landing gear are simulated, the turning or braking of the wheel 310 is controlled through the control device mounted on the mounting frame 120, and the turning load or the braking load of the landing gear is simulated. The pressure detection device is arranged on the lower workbench and is used to detect the load of the main landing gear; the buffer structure is arranged between the mounting frame 120 and the upper workbench 110, so that the upper workbench 110 is protected from damage. Through the above setting, various load conditions under actual use conditions are simulated, the durability and reliability of the landing gear are verified through the test equipment, after the test is completed, the collected data are analyzed, the performance of the landing gear is evaluated, according to the test results and data analysis, the landing gear design is adjusted and optimized as necessary, the test device is regularly checked and maintained, and normal operation and accurate simulation are ensured.

[0037] The fatigue test loading device of the main landing gear can set simulation of various load test conditions on a single device, improve test efficiency, and facilitate use of workers.

[0038] The above is only a preferred embodiment of the application and is not used to limit the application. For those skilled in the art, the application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A fatigue test loading device for a main landing gear, comprising a column and an upper seat (10) arranged on the column, and a lower seat (20) arranged below the upper seat (10), characterized in that: a bottom of the upper seat (10) is connected with an upper workbench (110), the upper workbench (110) is used for fixing the main landing gear, and a top of the lower seat (20) is provided with a lower workbench; a driving device is arranged on the column, and the driving device is used for driving the upper seat (10) to slide up and down along the column, so that a wheel (310) of the main landing gear is in contact with or separated from the lower workbench; the lower workbench comprises a first sliding plate (210), and the first sliding plate (210) and the lower seat (20) are connected through a first sliding structure, the first sliding structure comprises a driving piece, and the driving piece is used for driving the first sliding plate (210) to slide relative to the lower seat (20) in a rolling direction of the wheel (310).

2. The fatigue test loading device for a main landing gear according to claim 1, characterized in that, the upper workbench (110) fixes the main landing gear through a mounting rack (120), and the mounting rack (120) is connected with a main support rod (30) and an inclined support rod (330) of the main landing gear respectively; a buffer structure is arranged between the mounting rack (120) and the upper workbench (110); a pressure detection device is arranged on the lower workbench.

3. A fatigue test loading device for a main landing gear as claimed in claim 2, characterised in that, a control device is further arranged on the mounting rack (120), and the control device is used for controlling the wheel (310) to turn or brake.

4. The fatigue test loading device for a main landing gear according to claim 3, characterized in that, the control device comprises a rotating piece (121) hinged with a main shaft (320) of the main landing gear, the rotating piece (121) is connected with a motor (122), so that the main shaft (320) is driven to rotate through the motor (122), so that the wheel (310) is driven to turn, and the motor (122) is fixed to an inner side of the mounting rack (120) through a motor rack.

5. The fatigue test loading device for a main landing gear according to claim 3, wherein the control device further comprises a control piece connected with a brake disc of the wheel (310), and the control piece is used for driving the wheel (310) to brake or normally rotate.

6. The fatigue test loading device for a main landing gear according to claim 1, wherein the first sliding structure further comprises a plurality of first sliding blocks (211) arranged at a bottom of the first sliding plate (210), the first sliding blocks (211) extend in the rolling direction of the wheel (310), a top of the lower seat (20) is provided with a first sliding groove (201) matched with a width of the first sliding blocks (211), and the first sliding blocks (211) are arranged in the first sliding groove (201) to slide, so that the first sliding plate (210) is driven to slide relative to the lower seat (20); one end of at least one first sliding groove (201) is provided with a stop block, and a corresponding first sliding block (211) is provided with a groove towards the one end of the stop block, and the driving piece is arranged between the groove and the stop block.

7. The fatigue test loading device for a main landing gear according to claim 1, wherein The lower workbench further comprises a second sliding plate (220) arranged on the first sliding plate (210), and a second sliding structure is arranged between the second sliding plate (220) and the first sliding plate (210) to enable the second sliding plate (220) to slide in a direction perpendicular to the sliding direction of the first sliding plate (210).

8. A fatigue test loading device for a main landing gear as claimed in claim 7, characterised in that, The second sliding structure comprises a plurality of second sliding grooves (221) arranged at the bottom of the second sliding plate (220), the second sliding grooves (221) are arranged in a direction perpendicular to the rolling direction of the machine wheel (310), the top of the first sliding plate (210) is provided with second sliding blocks (212) matched with the second sliding grooves (221), and the second sliding blocks (212) are arranged to slide in the second sliding grooves (221) to drive the second sliding plate (220) to slide relative to the first sliding plate (210). The two ends of the second sliding groove (221) are respectively provided with stop blocks.

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