Aircraft wing body test tool

Abstract

The utility model discloses an aircraft wing body test tool in the technical field of aircraft test tools, which comprises a base, the base is formed by welding a cross rod and a vertical rod, the lower end of the vertical rod is welded with a foot margin, the cross rod is fixedly connected with a rotating shaft, the rotating shaft is provided with a connecting plate, the connecting plate is fixedly connected with a vertical arm, and the vertical arm is fixedly connected with the base. The vertical arm is fixedly connected with a connecting seat, the connecting seat is used for connecting an aircraft wing body test piece, and the connecting seat can rotate around a rotating shaft and is used for adjusting the angle of the vertical arm. According to the utility model, the worm and gear structure is arranged at the joint of the vertical arm and the base, so that accurate angle adjustment can be realized to adapt to different test requirements, and meanwhile, the position can be automatically locked after adjustment due to the self-locking characteristic of the worm and gear, so that angle deviation caused by load change in the test process is prevented, and the test accuracy is improved. The stability and reliability of the support are ensured, so that the accuracy of test data is improved.

Description

Technical Field

[0001] This utility model relates to the field of aircraft testing fixtures, and in particular to an aircraft wing-body testing fixture. Background Technology

[0002] The test fixture for aircraft test parts is used to mount the aircraft wing body on a support frame for ground static strength testing and sample display support. It is highly economical, with a simple and clear structure. The standard parts used can be purchased and used directly, simplifying the manufacturing and assembly process and making the assembly procedure more streamlined, which effectively improves work efficiency. However, this type of bracket lacks flexibility and cannot adapt to different test angles or load directions. It requires frequent replacement or customization of special brackets, which increases time and cost. It also cannot adjust the attitude of the sample during display, which limits the observation angle and has poor versatility. Therefore, we propose an aircraft wing body test fixture. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an aircraft wing-body testing fixture. By incorporating a worm gear at the connection between the vertical arm and the base, it provides rotational adjustment while also having a self-locking function. Furthermore, adjustable reinforcing ribs further ensure the overall strength of the testing fixture and improve its flexibility.

[0004] The purpose of this utility model is achieved as follows: an aircraft wing-body test fixture includes a base, which is welded together from a horizontal bar and a vertical bar. The lower end of the vertical bar is welded with a foot. A rotating shaft is fixedly connected to the horizontal bar. A connecting plate is provided on the rotating shaft. A vertical arm is fixedly connected to the connecting plate. A connecting seat is fixedly connected to the vertical arm. The connecting seat is used to connect the aircraft wing-body test piece. The connecting seat can rotate around the rotating shaft to adjust the angle of the vertical arm. A reinforcing rib is provided between the vertical arm and the vertical bar.

[0005] Optionally, a first rotating seat is fixedly connected to the vertical rod, a second rotating seat is fixedly connected to the vertical arm, one end of the reinforcing rib is hinged to the first connecting seat, and the other end of the reinforcing rib is hinged to the second connecting seat.

[0006] Optionally, the reinforcing rib includes a connecting rod and an adjusting rod. There are two connecting rods, and both ends of the adjusting rod are threaded. The two connecting rods are located on both sides of the adjusting rod, and the connecting rods are threadedly connected to the adjusting rod.

[0007] Optionally, a worm gear is provided on the rotating shaft, and a support seat is provided on the rotating shaft. The support seat has a lead groove. There are multiple support seats, and the multiple support seats are symmetrically distributed.

[0008] Optionally, the connecting plate is correspondingly arranged with the rotating shaft, the connecting plate is provided with mounting holes, the connecting plate is rotatably connected with the support base, the connecting plate is provided with limit holes, and the limit holes and the guide groove are fixed by screws.

[0009] Optionally, a worm gear is provided in the mounting hole, the worm gear is rotatably connected to the connecting plate, the worm gear meshes with the worm wheel, and a rocker arm is fixedly connected to the worm gear.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. By setting a worm gear structure at the connection between the upright arm and the base, this application can achieve precise angle adjustment to adapt to different test requirements. At the same time, the self-locking characteristic of the worm gear can automatically lock the position after adjustment, preventing angle deviation caused by load changes during the test, ensuring the stability and reliability of the support, thereby improving the accuracy of test data.

[0012] 2. The reinforcing ribs are bolted to the upright arm and vertical rod respectively, allowing the reinforcing ribs to be disassembled. At the same time, the entire tooling can be folded and stored by adjusting the angle of the upright arm, reducing the space occupied. In addition, the adjustable reinforcing ribs can ensure the strength of the upright arm within a certain range, improving the stability and reliability of the upright arm. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure provided by this utility model.

[0015] Figure 2 This is a schematic diagram of the connecting plate structure provided by this utility model.

[0016] Figure 3 This is a schematic diagram of the reinforcing rib structure provided by this utility model.

[0017] Figure 4 This is a schematic diagram of the support structure provided by this utility model.

[0018] Figure 5 This is a schematic diagram of the worm gear structure provided by this utility model.

[0019] In the diagram: 1. Base; 11. Horizontal bar; 12. Vertical bar; 13. Foot; 14. First rotating seat; 2. Reinforcing rib; 21. Connecting rod; 22. Adjusting rod; 3. Connecting plate; 31. Vertical arm; 32. Connecting seat; 33. Second rotating seat; 4. Rotating shaft; 41. Support seat; 42. Lead groove; 43. Limiting hole; 5. Worm gear; 51. Worm; 52. Mounting hole; 53. Rocker arm. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 5 The aircraft wing-body test fixture shown includes a base 1, which is welded together from a crossbar 11 and a vertical bar 12. A foot 13 is welded to the lower end of the vertical bar 12. A rotating shaft 4 is fixedly connected to the crossbar 11. A connecting plate 3 is provided on the rotating shaft 4. A vertical arm 31 is fixedly connected to the connecting plate 3. A connecting seat 32 is fixedly connected to the vertical arm 31. The connecting seat 32 is used to connect the aircraft wing-body test piece. The connecting seat 32 can rotate around the rotating shaft 4 to adjust the angle of the vertical arm 31. A reinforcing rib 2 is provided between the vertical arm 31 and the vertical bar 12.

[0022] Furthermore, the modular connection structure and adjustable support arm 31 structure enhance the flexibility and reliability of the test. The base 1 is welded together with the horizontal bar 11 and the vertical bar 12 and fixed with the foot 13 to ensure overall stability. At the same time, the combination of the rotating shaft 4 and the connecting plate 3 allows the support arm 31 to rotate around the shaft, which facilitates quick adjustment of the support angle and adapts to different test conditions (such as pitch and yaw load simulation). No disassembly and reassembly are required, which greatly improves efficiency.

[0023] The test piece is directly fixed to the vertical arm 31 and the connecting seat 32. Its rotation function can accurately match the wing body attitude and reduce data errors caused by support angle deviation. The reinforcing rib 2 forms a triangular support between the vertical arm 31 and the vertical rod 12, which effectively disperses load stress and avoids local deformation. The telescopic reinforcing rib 2 can further optimize the stiffness distribution and dynamically enhance the support for high stress areas.

[0024] It should be noted that the main body of the experimental fixture is welded from hollow rectangular steel pipes, which ensures the overall strength of the fixture while reducing its overall weight, making it easier for personnel to handle and operate.

[0025] During use, bolts are used to connect the wing-body assembly sample to the connecting seat 32. The bolts are fitted with a small clearance to ensure that the bolts are tightly fitted together with the wing-body assembly sample and the connecting seat 32.

[0026] Use anchor bolts 13 to fix the test fixture to the ground to ensure that it will not overturn during the test.

[0027] Specifically, a first rotating seat 14 is fixedly connected to the vertical rod 12, a second rotating seat 33 is fixedly connected to the vertical arm 31, one end of the reinforcing rib 2 is hinged to the first connecting seat 32, and the other end of the reinforcing rib 2 is hinged to the second connecting seat 32.

[0028] Specifically, the reinforcing rib 2 includes a connecting rod 21 and an adjusting rod 22. There are two connecting rods 21. The two ends of the adjusting rod 22 are threaded. The two connecting rods 21 are located on both sides of the adjusting rod 22. The connecting rods 21 and the adjusting rod 22 are threadedly connected.

[0029] Furthermore, the two ends of the reinforcing rib 2 are respectively hinged to the vertical rod 12 and the upright arm 31 through the first rotating seat 14 and the second rotating seat 33, forming a flexible connection. This allows the length to be adjusted to adapt to position changes when the angle of the upright arm 31 is adjusted, thus avoiding stress concentration or structural interference caused by rigid connection.

[0030] The reinforcing rib 2 adopts a modular structure, consisting of two connecting rods 21 and a two-way threaded adjusting rod 22. By rotating the adjusting rod 22, the overall length of the reinforcing rib 2 can be precisely adjusted. This not only allows the reinforcing rib 2 to quickly adjust its support stiffness according to different test requirements, but also allows it to be adjusted to the optimal support length after the angle of the upright arm 31 changes, ensuring the effectiveness of the triangular support structure.

[0031] In addition, threaded connections can provide reliable locking force to prevent loosening during testing, while also facilitating disassembly and maintenance.

[0032] Specifically, a worm gear 5 is provided on the rotating shaft 4, and a support seat 41 is provided on the rotating shaft 4. A guide groove 42 is provided on the support seat 41. There are multiple support seats 41, and the multiple support seats 41 are symmetrically distributed.

[0033] It should be noted that the rotating shaft 4 is a long integral piece, and the worm gear 5 and the support base 41 are both semi-cylinders. They are both fixedly installed on the rotating shaft 4 by welding. The worm gear 5 is located in the middle of the connecting plate 3 and needs to be aligned with the mounting hole 52 on the connecting plate 3. Then the position of the support base 41 is installed corresponding to the connecting plate 3 and is rotatably connected to the connecting plate 3.

[0034] Specifically, the connecting plate 3 is correspondingly arranged with the rotating shaft 4, the connecting plate 3 is provided with a mounting hole 52, the connecting plate 3 is rotatably connected with the support base 41, the connecting plate 3 is provided with a limiting hole 43, and the limiting hole 43 and the guide groove 42 are fixed by screws.

[0035] Furthermore, the connecting plate 3 and the support base 41 can rotate, and scales are set on the support base 41 on both sides for observing the rotation angle. At the same time, a screw is provided to pass through the lead groove 42 and be threaded to the limiting hole 43 on the connecting base 32. A thick rubber pad is fitted on the outside of the screw.

[0036] Furthermore, the connecting plate 3 is rotatably connected to the support base 41. With the help of the lead groove 42 and the limiting hole 43, it can be quickly locked and fixed at any angle by screws to ensure the stability of the support during the test. The thick rubber pad added to the outside of the screw is used to enhance the friction during locking, prevent loosening, and effectively absorb vibration, reduce micro-displacement caused by load fluctuations during the test, and improve the reliability of test data.

[0037] Specifically, a worm gear 51 is provided in the mounting hole 52, the worm gear 51 is rotatably connected to the connecting plate 3, the worm gear 51 meshes with the worm wheel 5, and a rocker arm 53 is fixedly connected to the worm gear 51.

[0038] Furthermore, the worm gear 5 and worm 51 transmission have self-locking characteristics, which can automatically maintain angular stability at any position. This prevents the vertical arm 31 from shifting due to vibration or load changes during the test without the need for an additional locking device, ensuring the reliability of the support. Secondly, the rocker arm 53 facilitates the rotation of the worm 51, providing fine-tuning operations for high-precision control of the angles of the connecting plate 3 and the vertical arm 31, meeting the stringent attitude requirements of aircraft wing-body testing. In addition, the meshing transmission structure of the worm gear 5 and worm 51 is more wear-resistant than friction locking, and can maintain smooth adjustment even after long-term use.

[0039] Working principle: Then rotate the rocker arm 53, which drives the connecting plate 3 to rotate through the worm gear 5 and worm 51, thereby driving the vertical arm 31 to rotate. Adjust the angle of the vertical arm 31, and at the same time rotate the adjusting rod 22 to keep the vertical arm 31, the vertical rod 12 and the reinforcing rib 2 in a triangular state. Then, tighten the screws to fix the connecting plate 3 to the support seat 41. Finally, fix the aircraft wing body to the connecting seat 32 with bolts and conduct test operations.

[0040] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An aircraft wing-body test jig comprising a base (1), characterised in that: The base (1) is welded from a horizontal bar (11) and a vertical bar (12). The lower end of the vertical bar (12) is welded with a foot (13). A rotating shaft (4) is fixedly connected to the horizontal bar (11). A connecting plate (3) is provided on the rotating shaft (4). A vertical arm (31) is fixedly connected to the connecting plate (3). A connecting seat (32) is fixedly connected to the vertical arm (31). The connecting seat (32) is used to connect the aircraft wing body test piece. The connecting seat (32) can rotate around the rotating shaft (4) to adjust the angle of the vertical arm (31). A reinforcing rib (2) is provided between the vertical arm (31) and the vertical bar (12).

2. A wing-body test fixture according to claim 1, wherein: A first rotating seat (14) is fixedly connected to the vertical rod (12), and a second rotating seat (33) is fixedly connected to the vertical arm (31). One end of the reinforcing rib (2) is hinged to the first connecting seat (32), and the other end of the reinforcing rib (2) is hinged to the second connecting seat (32).

3. A wing-body test fixture as claimed in claim 1, wherein: The reinforcing rib (2) includes a connecting rod (21) and an adjusting rod (22). There are two connecting rods (21). The two ends of the adjusting rod (22) are threaded. The two connecting rods (21) are located on both sides of the adjusting rod (22). The connecting rods (21) and the adjusting rod (22) are threadedly connected.

4. An aircraft wing-body test fixture as defined in claim 1, wherein: A worm gear (5) is provided on the rotating shaft (4), and a support seat (41) is provided on the rotating shaft (4). A guide groove (42) is provided on the support seat (41). There are multiple support seats (41), and the multiple support seats (41) are symmetrically distributed.

5. An aircraft wing-body test fixture as defined in claim 1, wherein: The connecting plate (3) is correspondingly arranged with the rotating shaft (4). The connecting plate (3) has an installation hole (52). The connecting plate (3) is rotatably connected with the support base (41). The connecting plate (3) has a limit hole (43). The limit hole (43) and the guide groove (42) are fixed by screws.

6. A wing-body test fixture according to claim 5, wherein: A worm (51) is provided in the mounting hole (52). The worm (51) is rotatably connected to the connecting plate (3). The worm (51) meshes with the worm wheel (5). A rocker arm (53) is fixedly connected to the worm (51).

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