Self-locking wing folding mechanism

Abstract

The application provides a self-locking wing folding mechanism, which comprises left and right curved rods, the left and right curved rods are arranged in parallel and have a predetermined interval, one end of each of the left and right curved rods is hingedly connected with a fixed wing, and the other end of each of the left and right curved rods is fixedly connected with a folding wing; a double-head motor is arranged between the left and right curved rods, the double-head motor is fixed opposite to the left and right curved rods; left and right drive rods, each of the left and right drive rods has a left and right drive rod spline shaft, the left and right drive rod spline shafts are connected with two output end splines of the double-head motor; left and right connecting rods, one end of each of the left and right connecting rods is hingedly connected with the fixed wing, and the other end of each of the left and right connecting rods is hingedly connected with the left and right drive rods; wherein the left and right curved rods and the left and right drive rods are respectively provided with left and right curved rod locking blocks and left and right drive rod locking blocks, when the folding wing is unfolded or turned to a limit position, the left and right curved rod locking blocks are respectively attached to the left and right drive rod locking blocks to limit movement.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aircraft wings, and particularly relates to a self-locking wing folding mechanism. BACKGROUND

[0002] Some aircrafts need to realize transformation between different positions and reliable locking at target positions in different use states. In order to meet the requirements of transformation and retention of wing positions in different use states of the aircraft, a wing folding mechanism of the aircraft needs to be designed.

[0003] The conventional wing folding mechanism generally adopts a mode of separating wing rotating devices and wing locking devices. The wing folding mechanism has a large space occupation, a complex structure, a heavy weight, and causes adverse effects on the flight performance of the aircraft. SUMMARY

[0004] The application aims to provide a self-locking wing folding mechanism to solve or alleviate at least one problem in the background art.

[0005] The technical scheme of the application is a self-locking wing folding mechanism, which comprises:

[0006] left and right curved rods, which are arranged in parallel and have a predetermined interval therebetween, and are fixedly connected to a folding wing at one end and hingedly connected to a fixed wing at the other end;

[0007] a double-head motor arranged between the left and right curved rods, which is fixedly connected to the left and right curved rods;

[0008] left and right drive rods, which respectively have left and right drive rod spline shafts and are spline-connected to two output ends of the double-head motor through the left and right drive rod spline shafts;

[0009] left and right connecting rods, which are hingedly connected to the fixed wing at one end and hingedly connected to the left and right drive rods at the other end;

[0010] wherein the left and right curved rods and the left and right drive rods are respectively provided with left and right curved rod locking blocks and left and right drive rod locking blocks, and the left and right curved rod locking blocks are respectively in contact with the left and right drive rod locking blocks to limit movement when the folding wing is unfolded or turned to the limit position.

[0011] Further, the left and right curved rods are symmetrical structures.

[0012] Further, the left and right curved rods are configured as a bent structure with a predetermined angle.

[0013] Further, the two output ends of the double-head motor output the same rotating direction through coaxial output.

[0014] Further, the left driving rod and the right driving rod are symmetrical structures.

[0015] Further, the left connecting rod and the right connecting rod are the same structure.

[0016] Further, the left curved rod locking block, the right curved rod locking block, the left driving rod locking block and the right driving rod locking block are all fan-shaped.

[0017] Compared with the existing wing folding mechanism, the self-locking wing folding mechanism of the application can effectively realize reliable locking of the wing in two limit positions without additional design of a special wing locking device, and has a lighter weight. In addition, in order to meet the requirements of aircraft structure bearing and wing folding, the application adopts the idea of mechanism and structure integration design, the curved rod with a locking block and the driving rod are used as structural parts for transmitting the folding wing load to the fixed wing, and are also used as mechanism parts for realizing the wing folding and locking function. By adopting the idea of mechanism and structure integration design, on the one hand, the number of parts of the folding mechanism is reduced, and on the other hand, the occupied space of the wing folding mechanism is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions provided by the application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the application.

[0019] Figure 1 It is a schematic diagram of the self-locking wing folding mechanism of the application.

[0020] Figure 2 It is a schematic diagram of the right curved rod in the application.

[0021] Figure 3 It is a schematic diagram of the left curved rod in the application.

[0022] Figure 4A It is a side view of the right driving rod in the application.

[0023] Figure 4B It is a front view of the right driving rod in the application.

[0024] Figure 5A It is a side view of the left driving rod in the application.

[0025] Figure 5B It is a front view of the left driving rod in the application.

[0026] Figure 6 It is a schematic diagram of the left connecting rod in the application.

[0027] Figure 7 A schematic diagram of the self-locking wing folding mechanism of the present application.

[0028] Figure 8 A schematic diagram of the self-locking wing folding mechanism of the present application in the folded wing flat state.

[0029] Figure 9 A schematic diagram of the self-locking wing folding mechanism of the present application in the folded wing starting to turn up position.

[0030] Figure 10 A schematic diagram of the self-locking wing folding mechanism of the present application in the folded wing continuing to turn up position.

[0031] Figure 11 A schematic diagram of the self-locking wing folding mechanism of the present application in the folded wing turning up to the limit position. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in more detail below with reference to the accompanying drawings of the present application.

[0033] In order to meet the requirements of wing position conversion and retention at the same time, make the wing realize reliable switching between the unfolded and 90° folded states, and be able to be reliably locked in the unfolded and folded limit positions, the present application provides a self-locking wing folding mechanism.

[0034] As shown in Figure 1 , the self-locking wing folding mechanism provided by the present application includes a double-head motor 31, a left curved rod 32, a right curved rod 33, a left drive rod 34, a right drive rod 35, a left connecting rod 36, a right connecting rod 37, and a pivot bolt and nut, etc.

[0035] As shown in Figure 2 and Figure 3 , the left curved rod 32 and the right curved rod 33 are overall L-shaped bent structures, the bending angle is determined according to the folding angle of the folded wing, and the two are arranged in parallel at a certain distance. One end of the left curved rod 32 and the right curved rod 33 is hinged to the left support 11 and the right support 12 on the fixed wing 10 through the pivot bolt and nut, and the other end is fixedly connected with the folded wing 20 through welding by passing through the opening 13 on the fixed wing 10. Among them, the left curved rod 32 and the right curved rod 33 respectively have a left curved rod locking block 321 and a right curved rod locking block 331, and the left curved rod locking block 321 and the right curved rod locking block 331 are fan-shaped.

[0036] The double-head motor 31 is arranged in the gap between the left curved rod 32 and the right curved rod 33, and is fixedly connected with the left curved rod 32 and the right curved rod 33. The output ends on both sides of the double-head motor 31 pass through the left curved rod 32 and the right curved rod 33 and are connected with the left driving rod 34 and the right driving rod 35 through the spline, so that the left driving rod 34 and the right driving rod 35 can be simultaneously driven to rotate. The two output ends of the double-head motor 31 output the same rotation direction through the coaxial output.

[0037] As shown in Figure 4A , Figure 4B and Figure 5A , Figure 5B , the left driving rod 34 and the right driving rod 35 are respectively provided with a left driving rod spline shaft 341 and a right driving rod spline shaft 351 on the side facing each other, and the left driving rod spline shaft 341 and the right driving rod spline shaft 351 are used to be connected with the two output ends of the double-head motor 31. Meanwhile, the left driving rod 34 and the right driving rod 35 are provided with a left driving rod locking block 342 and a right driving rod locking block 352, and the left driving rod locking block 342 and the right driving rod locking block 352 are also sector-shaped.

[0038] As shown in Figure 6 , the left connecting rod 36 and the right connecting rod 37 are the same in structure, and one end of each of the left connecting rod 36 and the right connecting rod 37 is hingedly connected with the fixed wing 10, and the other end is hingedly connected with the corresponding driving rod.

[0039] As shown in Figure 7 , the principle diagram of the self-locking wing folding mechanism is shown, wherein the hinge point of the left curved rod 32 and the right curved rod 33 with the fixed wing 10 is A, the hinge point of the left connecting rod 36 and the right connecting rod 37 with the fixed wing 10 is B, the hinge point of the left driving rod 34 and the right driving rod 35 is C, and the connection point of the left driving rod 34 and the right driving rod 35 with the double-head motor 31 is D.

[0040] As shown in Figure 8 , when the aircraft is flying, the folding wing 20 is flattened, the side surfaces of the locking blocks on the left driving rod and the right driving rod are attached to the left curved rod and the right curved rod, the rotation axis of the double-head motor 31 is slightly lower than the connecting line of the hinge points of the two ends of the left connecting rod and the right connecting rod (close to the dead point position of the mechanism), and the folding wing 20 can be reliably locked under the action of the upward flight load.

[0041] When the aircraft needs to fold the wing on the ground, as shown in Figure 9 and Figure 10 , the double-head motor 11 drives the left driving rod and the right driving rod to rotate clockwise, and under the transmission of the four-bar mechanism, the left curved rod and the right curved rod rotate counterclockwise to drive the folding wing 20 to turn upward.

[0042] As shown in Figure 11As shown, when the folding wing 20 is flipped to the limit position, the left and right driving rods are in contact with the other side of the locking block on the left and right curved rods, and the wing is folded. At this time, the rotating axis of the double-head motor 11 is slightly lower than the connecting line of the two ends of the left and right connecting rods (close to the dead point position of the mechanism), and the folding wing can be reliably locked under the action of the downward gravity load.

[0043] The folding wing 20 unfolding process is the reverse process of the above folding process, which will not be described here.

[0044] The self-locking wing folding mechanism provided by the application is based on the principle of four-bar mechanism, and the unfolding and folding of the wing are realized by rotating the driving rod and the curved rod driven by the double-head motor. The position of the wing is locked by the locking block on the driving rod and the curved rod at the limit position of the wing movement.

[0045] Compared with the existing wing folding mechanism, the self-locking wing folding mechanism of the application can effectively realize the reliable locking of the wing at two limit positions without the need for additional design of a special wing locking device, and is lighter in weight. In addition, in order to meet the requirements of aircraft structure bearing and wing folding, the application adopts the idea of mechanism and structure integration design. The curved rod and the driving rod with the locking block are used as structural parts for transmitting the load of the folding wing to the fixed wing, and are also used as mechanism parts for realizing the functions of wing folding and locking. By adopting the idea of mechanism and structure integration design, on the one hand, the number of parts of the folding mechanism is reduced, and on the other hand, the occupied space of the wing folding mechanism is also reduced.

[0046] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto. Any changes or replacements within the technical range disclosed by the application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A self-locking wing folding mechanism, characterized in that, The self-locking wing folding mechanism includes: A left curved rod and a right curved rod are arranged in parallel with a predetermined distance between them. One end of the left curved rod and the right curved rod are hinged to the fixed wing, and the other end is fixedly connected to the folding wing. A dual-head motor is installed between the left and right cranks, and the dual-head motor is fixed relative to the left and right cranks; A left drive rod and a right drive rod, each having a left drive rod spline shaft and a right drive rod spline shaft respectively, are connected to the two output ends of a dual-head motor via the left drive rod spline shaft and the right drive rod spline shaft; A left connecting rod and a right connecting rod, one end of which is hinged to the fixed wing and the other end of which is hinged to the left drive rod and the right drive rod, respectively; The left and right curved rods, as well as the left and right drive rods, are respectively equipped with a left curved rod locking block, a right curved rod locking block, a left drive rod locking block, and a right drive rod locking block. When the folding wing is flattened or flipped to its limit position, the left and right curved rod locking blocks are respectively engaged with the left and right drive rod locking blocks to restrict movement.

2. The self-locking wing folding mechanism as described in claim 1, characterized in that, The left and right curved rods are symmetrical structures.

3. The self-locking wing folding mechanism as described in claim 2, characterized in that, The left and right curved rods are configured as bent structures at predetermined angles.

4. The self-locking wing folding mechanism as described in claim 1, characterized in that, The two output ends of the dual-head motor output the same rotation direction through coaxial connection.

5. The self-locking wing folding mechanism as described in claim 1, characterized in that, The left and right drive rods are symmetrical.

6. The self-locking wing folding mechanism as described in claim 1, characterized in that, The left and right connecting rods have the same structure.

7. The self-locking wing folding mechanism as described in claim 1, characterized in that, The left crank lever locking block, right crank lever locking block, left drive lever locking block, and right drive lever locking block are all fan-shaped.

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