Aircraft bulk cargo cabin cargo net strength test equipment

Abstract

An aircraft bulk cargo cabin cargo net strength test device relates to the field of aircraft detection, anchor heads at the upper end of a cargo net are fixed in anchor seats at the lower end of an upper cross beam, anchor heads at the lower end of the cargo net are fixed in anchor seats at the upper end of a lower cross beam, and a pressure applying mechanism applies horizontal pressure to the fixed cargo net. Loads borne by the corresponding anchor bearings are collected through the three-dimensional force sensors, whether the strength of the aircraft structure meets the strength of the cargo net during bearing or not is verified through the collected load values, and meanwhile when the test load reaches a design value, whether the cargo net is damaged or not is observed, so that the strength of the cargo net is verified. The test efficiency is improved, the precision is improved, and the cargo net installation mode in the test is consistent with the airplane cargo hold installation mode.

Description

Technical Field

[0001] The utility model relates to the field of aircraft detection, in particular to a strength test device for a cargo net in an aircraft bulk cargo hold. Background Art

[0002] The cargo net is installed in the passenger cabin or cargo hold of an aircraft. Its main function is to isolate and block the goods loaded on the aircraft, prevent the goods from moving around during the flight of the aircraft, cause damage to the aircraft structure or large displacement of the goods, and shift the center of gravity position of the aircraft, affecting the safety of the aircraft. The strength of the aircraft cargo net is crucial for the safety of the cargo aircraft.

[0003] Currently, the cargo nets of mainstream aircraft models such as Airbus, Boeing, CRJ, ARJ, and ERJ are all made of flexible materials woven and sewn together, and are installed by connecting with the aircraft cargo hold structure through metal parts. An important part of the localization of the cargo net is to verify that the strength of the cargo net meets the design requirements. Since the main material of the cargo net is flexible material, there are uncertainties such as deformation and force transmission, and it is not possible to use a single piece to verify the strength of the cargo net. It is necessary to design a set of test tooling to simulate the installation method of the aircraft cargo hold, and design a set of loading surfaces simulating goods to conduct strength verification tests on the cargo net. Summary of the Invention

[0004] The utility model provides a strength test device for a cargo net in an aircraft bulk cargo hold, which improves the test efficiency and test accuracy.

[0005] The technical solution adopted by the utility model to overcome its technical problems is as follows:

[0006] A strength test device for a cargo net in an aircraft bulk cargo hold includes:

[0007] A base, on the upper ends of the left and right sides of which front columns are respectively arranged vertically;

[0008] A lower cross beam, having a U-shaped structure, the left and right ends of which are respectively fixed to the corresponding front columns on the same side. The radian of the lower cross beam matches the radian of the lower end of the aircraft cargo hold;

[0009] An upper cross beam, located above the lower cross beam, the left and right ends of which are respectively fixed to the corresponding front columns on the same side;

[0010] A plurality of bases are respectively arranged at intervals in the left-right direction at the lower end of the upper cross beam and the upper end of the lower cross beam. The anchor seats are connected to the bases through three-dimensional force sensors. Each anchor head at the upper end of the cargo net is respectively fixed in each corresponding anchor seat at the lower end of the upper cross beam, and each anchor head at the lower end of the cargo net is respectively fixed in each corresponding anchor seat at the upper end of the lower cross beam; and

[0011] A pressure applying mechanism is arranged on the base and is used to apply a horizontal pressure to the fixed cargo net.

[0012] To improve rigidity, it further includes a slant brace II arranged obliquely, the lower end of the slant brace II is connected to the base, and its upper end is connected to the rear end of the corresponding front column.

[0013] Furthermore, the pressing mechanism includes a linear guide horizontally installed on the lower crossbeam in the front-rear direction, a guide rail slider slidably installed on the linear guide, a rear column vertically installed on the base and located at the rear end of the front column, and a support frame fixed on the guide rail slider. An ear seat is installed at the front end of the rear column. The tail end of the oil cylinder is hinged to the ear seat through a pin shaft, the head end of the piston rod of the oil cylinder is connected to the rear end of the support frame, the axis of the oil cylinder is parallel to the linear guide, the cross-sectional area of the longitudinal section of the support frame matches the unfolded area of the cargo net, and a plurality of arc-shaped actuating plates are fixed on the front end face of the support frame.

[0014] To improve rigidity, it further includes a slant brace I arranged obliquely, the lower end of the slant brace I is connected to the base, and its upper end is connected to the rear end of the corresponding rear column.

[0015] To feedback the loading force value, it further includes a pressure sensor. The head end of the piston rod of the oil cylinder is connected to the support frame through the pressure sensor.

[0016] Preferably, the above-mentioned actuating plates are made of wood.

[0017] To facilitate adapting to different specifications of cargo nets, a plurality of screw holes I are arranged at intervals along the vertical direction on the front column. Bolt I passes through the upper crossbeam and is screwed into the corresponding screw hole I. Bolt II passes through the lower crossbeam and is screwed into the corresponding screw hole I. A plurality of screw holes II are arranged at intervals along the vertical direction on the rear column. The threaded fastener passes through the ear seat and is screwed into the corresponding screw hole II.

[0018] The beneficial effects of the present utility model are as follows: Fix each anchor head at the upper end of the cargo net in each anchor seat at the lower end of the upper crossbeam, and fix each anchor head at the lower end of the cargo net in each anchor seat at the upper end of the lower crossbeam. The pressing mechanism applies a horizontal pressure to the fixed cargo net. The loads received by the corresponding anchor seats are collected through each three-dimensional force sensor. The strength of the aircraft structure is verified by the collected load values to see if it meets the strength when the cargo net is loaded. At the same time, when the test load reaches the design value, observe whether the cargo net is damaged, so as to verify the strength of the cargo net. It improves the test efficiency, improves the accuracy, and realizes that the installation method of the cargo net during the test is the same as that in the aircraft cargo hold. Description of the Drawings

[0019] Figure 1 It is a usage state diagram of the present utility model;

[0020] Figure 2 It is a side view structure diagram of the present utility model;

[0021] Figure 3It is the three-dimensional structure diagram of the present utility model;

[0022] Figure 4 It is the top view structure diagram of the present utility model;

[0023] Figure 5 It is the structure diagram of the anchor head part of the present utility model;

[0024] Figure 6 It is the structure diagram of the anchor seat part of the present utility model;

[0025] In the figure, 1. base; 2. rear column; 3. front column; 4. diagonal brace Ⅰ; 5. diagonal brace Ⅱ; 6. oil cylinder; 7. ear seat; 8. pin shaft; 9. lower cross beam; 10. upper cross beam; 11. screw hole Ⅰ; 12. bolt Ⅰ; 13. cargo net; 14. screw hole Ⅱ; 15. bolt Ⅱ; 16. linear guide rail; 17. guide rail slider; 18. base; 19. three-dimensional force sensor; 20. support frame; 21. actuating plate; 22. pressure sensor; 23. anchor head; 24. anchor seat. Specific embodiments

[0026] The following will further illustrate the present utility model in conjunction with the attached Figure 1 to the attached Figure 6 drawings.

[0027] An aircraft bulk cargo hold cargo net strength test device, comprising: a base 1, on the upper ends of the left and right sides of which front columns 3 are respectively arranged vertically; a lower cross beam 9, having a U-shaped structure, the left and right ends of which are respectively fixed to the corresponding front columns 3 on the same side, and the radian of the lower cross beam 9 matches the radian of the lower end of the aircraft cargo hold to ensure that the installation method of the cargo net 13 remains consistent; an upper cross beam 10, located above the lower cross beam 9, the left and right ends of which are respectively fixed to the corresponding front columns 3 on the same side; a plurality of pedestals 18 are respectively arranged at intervals in the left-right direction at the lower end of the upper cross beam 10 and the upper end of the lower cross beam 9, an anchor seat 24 is connected to the pedestal 18 through a three-dimensional force sensor 19, each anchor head 23 at the upper end of the cargo net 13 is respectively fixed in each corresponding anchor seat 24 at the lower end of the upper cross beam 10, and each anchor head 23 at the lower end of the cargo net 13 is respectively fixed in each corresponding anchor seat 24 at the upper end of the lower cross beam 9; and a pressing mechanism, arranged on the base 1, for applying a horizontal pressure to the fixed cargo net 13. During use, each anchor head 23 at the upper end of the cargo net 13 is fixed in each anchor seat 24 at the lower end of the upper cross beam 10, and each anchor head 23 at the lower end of the cargo net 13 is fixed in each anchor seat 24 at the upper end of the lower cross beam 9. The positions of each anchor seat 24 on the upper cross beam 10 and each anchor seat on the lower cross beam 9 are the same as the positions of the anchor seats at the corresponding positions of the aircraft cargo hold, so as to simulate the installation position of the cargo net 13. The pressing mechanism applies a horizontal pressure to the fixed cargo net 13, collects the loads received by the corresponding anchor seats 24 through each three-dimensional force sensor 19, verifies whether the strength of the aircraft structure meets the strength when the cargo net 13 is loaded through the collected load values, and at the same time, observes whether the cargo net 13 is damaged when the test load reaches the design value, so as to verify the strength of the cargo net 13. The test efficiency is improved, the accuracy is improved, and the installation method of the cargo net 13 during the test is made consistent with the installation of the aircraft cargo hold.

[0028] In an embodiment of the present invention, it further includes an inclined strut II 5 arranged obliquely, the lower end of the inclined strut II 5 is connected to the base 1, and its upper end is connected to the rear end of the corresponding front column 3. By adding the inclined strut II 5, a stable triangular fixing relationship is formed between the front column 3 and the base 1, the rigidity of the connection between the front column 3 and the base 1 is improved, and the service life and reliability are improved.

[0029] In an embodiment of the present utility model, the pressing mechanism may have the following structure, which includes a linear guide rail 16 horizontally installed on the lower cross beam 9 in the front-rear direction, a guide rail slider 17 slidably installed on the linear guide rail 16, a rear column 2 vertically installed on the base 1 and located at the rear end of the front column 3, and a support frame 20 fixed to the guide rail slider 17. An ear seat 7 is installed at the front end of the rear column 2. The tail end of the oil cylinder 6 is hingedly connected to the ear seat 7 through a pin shaft 8. The head end of the piston rod of the oil cylinder 6 is connected to the rear end of the support frame 20. The axis of the oil cylinder 6 is parallel to the linear guide rail 16. The cross-sectional area of the support frame 20 in the longitudinal section matches the unfolded area of the cargo net 13. A plurality of arc-shaped actuating plates 21 are fixed to the front end face of the support frame 20. When the piston rod of the oil cylinder 6 extends outwards, it pushes the support frame 20 to slide forward along the linear guide rail 16 by using the guide rail slider 17, so that each actuating plate 21 applies a horizontal pressure to the cargo net 13 to complete the test of the strength of the cargo net. In this embodiment, the actuating plate 21 is made of wood. Wood has the advantages of light weight and strong compressive capacity, so the service life is guaranteed. In addition, wood has the advantage of good plasticity, and it can effectively reduce the damage to the cargo net 13 when it contacts the cargo net 13. The actuating plate 21 is of an arc-shaped structure, and its outer contour can simulate the curved surface contour formed after the goods impact the cargo net 13.

[0030] In this embodiment, it further includes an inclined strut I 4 which is inclined. The lower end of the inclined strut I 4 is connected to the base 1, and its upper end is connected to the rear end of the corresponding rear column 2. By adding the inclined strut I 4, a stable triangular fixing relationship is formed between the rear column 2 and the base 1, improving the rigidity of the connection between the rear column 2 and the base 1 and enhancing the service life and reliability.

[0031] In an embodiment of the present utility model, it further includes a pressure sensor 22. The head end of the piston rod of the oil cylinder 6 is connected to the support frame 20 through the pressure sensor 22. Through the pressure sensor 22, the magnitude of the loading force value when the oil cylinder 6 drives the support frame 20 to apply pressure to the cargo net 13 can be implemented and fed back. By adjusting the pressure value of the hydraulic system, the magnitude of the loading force value of the oil cylinder 6 can be changed, and the structure is simple and convenient.

[0032] In an embodiment of the present utility model, a plurality of screw holes I 11 are arranged at intervals in the vertical direction on the front column 3. The bolt I 12 passes through the upper cross beam 10 and is screwed into the corresponding screw hole I 11. The bolt II 15 passes through the lower cross beam 3 and is screwed into the corresponding screw hole I 11. A plurality of screw holes II 14 are arranged at intervals in the vertical direction on the rear column 2. The threaded fastener passes through the ear seat 7 and is screwed into the corresponding screw hole II 14. The upper cross beam 10, the lower cross beam 9 and the ear seat 7 are all connected by threaded fasteners, so the installation height can be conveniently adjusted to be suitable for the test use of cargo nets 13 of different specifications.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An aircraft bulk cargo hold cargo net strength test equipment, characterized in that, Comprising: A base (1), on the left and right sides of the upper end of which there are respectively front columns (3) arranged vertically; A lower cross beam (9), having a U-shaped structure, the left and right ends of which are respectively fixed to the corresponding front columns (3) on the same side, and the radian of the lower cross beam (9) matches the radian of the lower end of the aircraft cargo hold; An upper cross beam (10), located at the upper end of the lower cross beam (9), the left and right ends of which are respectively fixed to the corresponding front columns (3) on the same side; A plurality of bases (18) are respectively arranged at intervals in the left-right direction at the lower end of the upper cross beam (10) and the upper end of the lower cross beam (9). An anchor seat (24) is connected to the base (18) through a three-dimensional force sensor (19). Each anchor head (23) at the upper end of the cargo net (13) is respectively fixed in each corresponding anchor seat (24) at the lower end of the upper cross beam (10), and each anchor head (23) at the lower end of the cargo net (13) is respectively fixed in each corresponding anchor seat (24) at the upper end of the lower cross beam (9); and A pressing mechanism, arranged on the base (1), for applying a horizontal pressure to the fixed cargo net (13).

2. The aircraft bulk cargo hold cargo net strength test equipment according to claim 1, wherein: It further includes an inclined stay II (5), the lower end of the inclined stay II (5) is connected to the base (1), and the upper end thereof is connected to the rear end of the corresponding front column (3).

3. The aircraft bulk cargo hold cargo net strength test equipment according to claim 1, characterized in that: The pressing mechanism includes a linear guide rail (16) horizontally installed on the lower cross beam (9) in the front-rear direction, a guide rail slider (17) slidably installed on the linear guide rail (16), a rear column (2) vertically installed on the base (1) and located at the rear end of the front column (3), and a support frame (20) fixed to the guide rail slider (17). An ear seat (7) is installed at the front end of the rear column (2). The tail end of the oil cylinder (6) is hingedly connected to the ear seat (7) through a pin shaft (8). The piston rod head end of the oil cylinder (6) is connected to the rear end of the support frame (20). The axis of the oil cylinder (6) is parallel to the linear guide rail (16). The cross-sectional area of the longitudinal section of the support frame (20) matches the unfolded area of the cargo net (13). A plurality of arc-shaped actuating plates (21) are fixed to the front end face of the support frame (20).

4. The aircraft bulk cargo hold cargo net strength test equipment according to claim 1, characterized in that: It further includes an inclined stay I (4), the lower end of the inclined stay I (4) is connected to the base (1), and the upper end thereof is connected to the rear end of the corresponding rear column (2).

5. The aircraft bulk cargo hold cargo net strength test equipment according to claim 3, characterized in that: It further includes a pressure sensor (22), and the piston rod head end of the oil cylinder (6) is connected to the support frame (20) through the pressure sensor (22).

6. The aircraft bulk cargo hold cargo net strength test equipment according to claim 3, characterized in that: The actuating plate (21) is made of wood.

7. The aircraft bulk cargo hold cargo net strength test equipment according to claim 3, characterized in that: A plurality of screw holes I (11) are arranged at intervals in the vertical direction on the front column (3). A bolt I (12) passes through the upper cross beam (10) and is screwed into the corresponding screw hole I (11). A bolt II (15) passes through the lower cross beam (9) and is screwed into the corresponding screw hole I (11). A plurality of screw holes II (14) are arranged at intervals in the vertical direction on the rear column (2). A threaded fastener passes through the ear seat (7) and is screwed into the corresponding screw hole II (14).

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