A variable-span wing and an aircraft

Abstract

The present invention relates to the field of aerospace equipment, and discloses a variable-span wing and an aircraft. The aircraft includes a variable-span wing, and the variable-span wing includes: at least two wing ribs, and all the wing ribs are arranged in parallel at intervals in sequence; a folding mechanism, and a folding mechanism is provided between any two adjacent wing ribs. The folding mechanism includes a locking member, an elastic member and two connecting rods. One ends of the two connecting rods are hinged, and the other ends of the two connecting rods are respectively arranged opposite to the two wing ribs. At least one elastic member corresponds to one connecting rod, and the other ends of the respective connecting rods are connected to the corresponding wing ribs through the corresponding elastic members, and each connecting rod is hinged to the corresponding wing rib. The elastic member is used to keep the connecting rod perpendicular to the corresponding wing rib, and the locking member is used to lock or unlock the connecting rod and the wing rib when the connecting rod is perpendicular to the wing rib. Adjusting the distance between two adjacent wing ribs through the folding of the folding mechanism can enable the variable-span wing to achieve a higher folding rate.

Description

Technical Field

[0001] The present invention relates to the field of aerospace equipment, and particularly to a variable-span wing and an aircraft. Background Art

[0002] Wing span variation is the simplest and most intuitive way of wing deformation. During flight, an aircraft changes its wing span length, thereby changing its aerodynamic characteristics to meet the mission requirements under various different flight conditions. A telescopic wing has a strong ability to change the aspect ratio and area of the wing. When the wing extends outward, the aircraft obtains a good lift-to-drag ratio and long endurance ability; when the wing retracts inward, the drag on the aircraft is reduced, and its high-speed sprint performance and maneuverability are enhanced. In addition, when the asymmetric telescoping means that the deformation amounts of the two wings are different, the aircraft can also obtain an additional rolling moment to improve the controllability in the lateral and yaw directions.

[0003] A telescopic wing structure with continuously variable wing span disclosed in a Chinese utility model patent with the application number CN215285243U uses an electric push rod to drive the second main wing to move laterally relative to the first main wing, thereby realizing the telescoping of the wing and meeting the requirements of various flight environments. The most important defect of this design is the folding rate that the wing can achieve, that is, the contraction rate that the wing can achieve is relatively low.

[0004] Therefore, how to overcome the above defects has become an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a variable-span wing with a higher folding rate and an aircraft including the variable-span wing.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a variable-span wing, comprising:

[0008] At least two wing ribs, all the wing ribs are arranged in parallel at intervals in sequence;

[0009] A folding mechanism, the folding mechanism is arranged between any two adjacent wing ribs. The folding mechanism includes a locking member, an elastic member and two connecting rods. One ends of the two connecting rods are hinged together. The other ends of the two connecting rods are respectively arranged opposite to the two wing ribs. One connecting rod corresponds to at least one elastic member. The other end of each connecting rod is connected to the corresponding wing rib through the corresponding elastic member, and each connecting rod is hinged to the corresponding wing rib. The elastic member is used to keep the connecting rod perpendicular to the corresponding wing rib, and the locking member is used to lock or unlock the connecting rod and the wing rib when the connecting rod is perpendicular to the wing rib.

[0010] Optionally, the number of the folding mechanisms is at least two.

[0011] Optionally, the number of the folding mechanisms is three. When each of the connecting rods is perpendicular to the wing rib, the three folding mechanisms are arranged in a triangle, and the centroid of the triangle coincides with the focus position of the wing rib.

[0012] Optionally, the locking member includes a first deformable tooth and a second deformable tooth. One of the first deformable tooth and the second deformable tooth is arranged on the connecting rod, and the other is arranged on the wing rib opposite to the connecting rod. The first deformable tooth and the second deformable tooth can be engaged with each other when the connecting rod is perpendicular to the wing rib to lock the connecting rod and the wing rib, and can be separated from each other to unlock the connecting rod and the wing rib.

[0013] Optionally, the first deformable tooth includes a first plane and a first inclined plane, and the second deformable tooth includes a second plane and a second inclined plane. The first plane and the second plane are both parallel to the wing rib, and the first inclined plane and the second inclined plane are parallel to each other and both form a first angle with the wing rib;

[0014] One of the first deformable tooth and the second deformable tooth is arranged below the other, and the first plane is attached to the second plane to lock the connecting rod and the wing rib.

[0015] Optionally, the locking member further includes a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are both perpendicular to the wing rib. The first deformable tooth and the second deformable tooth are respectively arranged on the first connecting plate and the second connecting plate. One of the first connecting plate and the second connecting plate is arranged on the connecting rod, and the other is arranged on the wing rib.

[0016] Optionally, the folding mechanism further includes a connecting member. Both ends of the two connecting rods away from the wing rib are hinged to the connecting member.

[0017] Optionally, the folding mechanism further includes a first rotating shaft. One end of the connecting rod away from the wing rib is hinged to the connecting member through the first rotating shaft.

[0018] Optionally, the folding mechanism further includes a second rotating shaft and a mounting seat. A second rotating shaft is arranged at each end of each connecting rod opposite to the wing rib. Each second rotating shaft is rotatably connected to a mounting seat. Each mounting seat is fixedly connected to the wing rib opposite to the connecting rod. The elastic member is a torsion spring. The torsion spring is sleeved on the second rotating shaft, and two ends of the torsion spring are respectively connected to the mounting seat and the second rotating shaft.

[0019] The present invention also provides an aircraft, comprising the variable-span wing described above.

[0020] The present invention has achieved the following technical effects compared with the prior art:

[0021] The variable-span wing provided by the present invention includes: at least two wing ribs, and all the wing ribs are arranged in parallel at intervals in sequence; folding mechanisms, folding mechanisms are arranged between any two adjacent wing ribs, and each folding mechanism includes a locking member, an elastic member and two connecting rods. One end of the two connecting rods is hinged, and the other ends of the two connecting rods are respectively arranged opposite to the two wing ribs. At least one elastic member corresponds to one connecting rod, and the other end of each connecting rod is connected to the wing rib opposite thereto through the corresponding elastic member, and each connecting rod is hinged to the wing rib opposite thereto. The elastic member is used to keep the connecting rod perpendicular to the opposite wing rib, and the locking member is used to lock or unlock the connecting rod and the wing rib when the connecting rod is perpendicular to the wing rib.

[0022] During the specific use process, in the unlocked state of the locking member, rotate the two connecting rods relative to each other, and at the same time make the connecting rods rotate relative to the wing ribs, then the folding of the folding mechanism can be realized, and further the distance between two adjacent wing ribs can be shortened, so as to realize the folding of the variable-span wing. Compared with the telescopic wing structure with continuously variable wingspan mentioned in the background art, the variable-span wing provided by the present invention has a higher folding rate, and the variable-span wing provided by the present invention has a smaller mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the variable-span wing provided in the embodiment of the present invention;

[0025] Figure 2 It is a partial structural diagram of the variable-span wing provided in the embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the arrangement mode of the folding mechanism provided in the embodiment of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the locking member of the folding mechanism provided in the embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the locking process of the folding mechanism provided in the embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the deployment process of the variable-span wing provided in the embodiment of the present invention;

[0030] Figure 7 It is a schematic diagram of the hinged manner between the connecting member and the connecting rod of the variable-span wing provided in the embodiment of the present invention.

[0031] Figures 1-7 Explanation of reference numerals: 1, wing rib; 101, focus position; 2, folding mechanism; 201, elastic member; 202, connecting rod; 203, first deformable tooth; 204, second deformable tooth; 205, first connecting plate; 206, second connecting plate; 207, connecting member; 208, first rotating shaft; 209, second rotating shaft; 210, mounting plate. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] The purpose of the present invention is to provide a variable-span wing and an aircraft with a higher folding rate.

[0034] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0035] Referring to Figures 1-7 As shown, the variable-span wing provided in the embodiment of the present invention includes: a folding mechanism 2 and at least two wing ribs 1. Specifically, all the wing ribs 1 are arranged in parallel at intervals in the length direction of the variable-span wing, and a folding mechanism 2 is provided between any two adjacent wing ribs 1. The specific number of the wing ribs 1 is determined according to actual needs.

[0036] The folding mechanism 2 includes a locking member, an elastic member 201, and two connecting rods 202. One ends of the two connecting rods 202 are hinged together. The other ends of the two connecting rods 202 are respectively arranged opposite to two wing ribs 1. At least one elastic member 201 corresponds to one connecting rod 202. The other end of each connecting rod 202 is connected to the corresponding wing rib 1 through the corresponding elastic member 201, and each connecting rod 202 is hinged to the corresponding wing rib 1. The elastic member 201 is used to keep the connecting rod 202 perpendicular to the corresponding wing rib 1. The locking member is used to lock or unlock the connecting rod 202 and the wing rib 1 when the connecting rod 202 is perpendicular to the wing rib 1. When the two connecting rods 202 of the folding mechanism 2 are both perpendicular to the wing rib 1, the axes of the two connecting rods 202 of the folding mechanism 2 preferably coincide.

[0037] During the specific use process, in the unlocked state of the locking member, rotate the two connecting rods 202 relative to each other, and at the same time make the connecting rods 202 rotate relative to the wing ribs 1, then the folding of the folding mechanism 2 can be realized, and further the distance between two adjacent wing ribs 1 can be shortened, so as to realize the folding of the variable-span wing.

[0038] Compared with the telescopic wing structure with continuously variable wingspan mentioned in the background art, the folding rate of the variable-span wing provided by the present invention is higher. And compared with the electric push rod, the folding mechanism 2 of the variable-span wing provided by the present invention has a smaller mass, and thus the variable-span wing provided by the present invention has a smaller mass.

[0039] In another embodiment of the present invention, the number of the folding mechanisms 2 is at least two.

[0040] As an optional implementation manner, as Figures 1-3 shown, the number of the folding mechanisms 2 is three. When each connecting rod 202 is perpendicular to the wing rib 1, the three folding mechanisms 2 are arranged side by side, the three folding mechanisms 2 are arranged in a triangular shape, the three folding mechanisms 2 are respectively located at the three vertex positions of the triangle, and the center of gravity of the triangle coincides with the focus position 101 of the wing rib 1. Of course, the number of the folding mechanisms 2 can also be other numbers. For example, the number of the folding mechanisms 2 is four. When each connecting rod 202 is perpendicular to the wing rib 1, the four folding mechanisms 2 are arranged side by side, the four folding mechanisms 2 are arranged in a square shape, and the four folding mechanisms 2 are respectively located at the four vertex positions of the square.

[0041] In another embodiment of the present invention, as Figures 4-5As shown, the locking member is a snap-locking structure, and the locking member includes, for example, a first deformable tooth 203 and a second deformable tooth 204, both of which are made of a deformable material, and one of the first deformable tooth 203 and the second deformable tooth 204 is arranged on the connecting rod 202, and the other is arranged on the rib 1 opposite to the connecting rod 202. The first deformable tooth 203 and the second deformable tooth 204 can be engaged with each other when the connecting rod 202 is perpendicular to the rib 1 to lock the connecting rod 202 and the rib 1, and can be separated under a certain external force to unlock the connecting rod 202 and the rib 1. The magnitude of the external force is determined according to actual needs, and the first deformable tooth 203 and the second deformable tooth 204 are deformed and staggered by applying an external force, thereby realizing the unlocking of the connecting rod 202 and the rib 1.

[0042] As an optional implementation, Figure 4 As shown, the first deformable tooth 203 includes a first plane and a first inclined plane, and the second deformable tooth 204 includes a second plane and a second inclined plane. The first plane and the second plane are parallel to the rib 1, and the first inclined plane and the second inclined plane are parallel to each other and both form a first angle with the rib 1, and the first angle is, for example, an acute angle. One of the first deformable tooth 203 and the second deformable tooth 204 is arranged below the other, and the first plane is in contact with the second plane to lock the connecting rod 202 and the rib 1. It should be pointed out that the purpose of setting the first inclined plane and the second inclined plane is to facilitate the first deformable tooth 203 and the second deformable tooth 204 to engage with each other.

[0043] Furthermore, if Figures 4-5 As shown, the locking member also includes a first connecting plate 205 and a second connecting plate 206, the first connecting plate 205 and the second connecting plate 206 are both perpendicular to the wing rib 1, the first deformable tooth 203 and the second deformable tooth 204 are respectively arranged on the first connecting plate 205 and the second connecting plate 206, one of the first connecting plate 205 and the second connecting plate 206 is arranged on the connecting rod 202, and the other is arranged on the wing rib 1.

[0044] Furthermore, the material of the first connecting plate 205 and the second connecting plate 206 is the same as that of the first deformable tooth 203 and the second deformable tooth 204, for example, both are made of plastic material, and the first connecting plate 205, the second connecting plate 206, the first deformable tooth 203 and the second deformable tooth 204 can be processed by 3D printing.

[0045] Figure 4 Specifically, the first connecting plate 205 is arranged on the rib 1, and the second connecting plate 206 is arranged on the connecting rod 202. When the connecting rod 202 and the rib 1 are in a locked state, the first deformable tooth 203 is arranged above the second deformable tooth 204.

[0046] In another embodiment of the present invention, as Figure 7 shown, the folding mechanism 2 further includes a connecting member 207. One end of each of the two link rods 202 away from the wing rib 1 is hingedly connected to the connecting member 207. The connecting member 207 is, for example, a connecting block.

[0047] During the specific use process, all the folding mechanisms 2 between two adjacent wing ribs 1 are folded and unfolded synchronously, and the two link rods 202 of the same folding mechanism 2 rotate synchronously.

[0048] Further, the folding mechanism 2 further includes a first rotating shaft 208. One end of the link rod 202 away from the wing rib 1 is hingedly connected to the connecting member 207 through the first rotating shaft 208.

[0049] Furthermore, as Figure 7 shown, one end of each of the two link rods 202 away from the wing rib 1 is provided with a groove. Two ends of the connecting member 207 respectively extend into the two grooves. The rotating shaft passes through two opposite side walls of the groove and simultaneously passes through the connecting member 207, so as to realize the hinged connection between the connecting member 207 and the link rod 202 through the first rotating shaft 208.

[0050] In another embodiment of the present invention, as Figure 4 shown, the folding mechanism 2 further includes a second rotating shaft 209 and a mounting seat. One end of each link rod 202 opposite to the wing rib 1 is provided with a second rotating shaft 209. Each second rotating shaft 209 is rotatably connected to a mounting seat. Each mounting seat is fixedly connected to the wing rib 1 opposite to the link rod 202. The elastic member 201 is a torsion spring. The torsion spring is sleeved on the second rotating shaft 209. Two ends of the torsion spring are respectively connected to the mounting seat and the second rotating shaft 209.

[0051] Further, as Figure 4 shown, the middle part of the second rotating shaft 209 is connected to one end of the link rod 202. Two ends of the second rotating shaft 209 are rotatably connected to the mounting seat. The mounting seat is, for example, two parallel and oppositely arranged mounting plates 210. Each mounting plate 210 is fixedly connected to the wing rib 1. Two ends of the second rotating shaft 209 are respectively rotatably connected to the two mounting plates 210. One torsion spring is sleeved on each of the two ends of the second rotating shaft 209. One end of each of the two torsion springs is respectively connected to the two mounting plates 210. The other ends of the two torsion springs are both connected to the rotating shaft. The elastic force of the torsion spring enables the link rod 202 to be kept perpendicular to the wing rib 1.

[0052] In addition, as an optional implementation, when the folding mechanism 2 is in the folded state, the two wing ribs 1 connected to the folding mechanism 2 are tied by a tying member, such as a tying rope, to keep the folding mechanism 2 in the required folded state. Moreover, when the folding degree of the folding mechanism 2 is different, the distance between the two wing ribs 1 connected to the folding mechanism 2 is different. After the tying of the two wing ribs 1 is released, the elastic force of the torsion spring can reset the connecting rod 202, so that each connecting rod 202 is perpendicular to the wing rib 1.

[0053] An embodiment of the present invention further provides an aircraft, including the variable-span wing described in any of the above embodiments.

[0054] In this specification, specific examples are used to elaborate on the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A variable-span wing, characterized in that, Comprising: At least two wing ribs, and all the wing ribs are arranged in parallel at intervals in sequence; A folding mechanism, and the folding mechanism is arranged between any two adjacent wing ribs. The folding mechanism includes a locking member, an elastic member, and two connecting rods. One ends of the two connecting rods are hinged, and the other ends of the two connecting rods are respectively arranged opposite to the two wing ribs. At least one elastic member corresponds to one connecting rod, and the other ends of the respective connecting rods are connected to the corresponding wing ribs through the corresponding elastic members, and each connecting rod is hinged to the corresponding wing rib. The elastic member is used to keep the connecting rod perpendicular to the corresponding wing rib, and the locking member is used to lock or unlock the connecting rod and the wing rib when the connecting rod is perpendicular to the wing rib; The number of the folding mechanisms is three. When each connecting rod is perpendicular to the wing rib, the three folding mechanisms are arranged in a triangle, and the centroid of the triangle coincides with the focal position of the wing rib.

2. The variable-span wing according to claim 1, characterized in that, The locking member includes a first deformable tooth and a second deformable tooth. One of the first deformable tooth and the second deformable tooth is arranged on the connecting rod, and the other is arranged on the wing rib opposite to the connecting rod. The first deformable tooth and the second deformable tooth can be buckled together when the connecting rod is perpendicular to the wing rib to lock the connecting rod and the wing rib, and can be separated to unlock the connecting rod and the wing rib.

3. The variable-extension wing according to claim 2, characterized in that, The first deformable tooth includes a first plane and a first inclined plane, and the second deformable tooth includes a second plane and a second inclined plane. The first plane and the second plane are both parallel to the wing rib, and the first inclined plane and the second inclined plane are parallel to each other and both form a first angle with the wing rib; One of the first deformable tooth and the second deformable tooth is arranged below the other, and the first plane is attached to the second plane to lock the connecting rod and the wing rib.

4. The variable-span wing according to claim 2, characterized in that, The locking member further includes a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are both perpendicular to the wing rib. The first deformable tooth and the second deformable tooth are respectively arranged on the first connecting plate and the second connecting plate. One of the first connecting plate and the second connecting plate is arranged on the connecting rod, and the other is arranged on the wing rib.

5. The variable-span wing according to claim 1, characterized in that, The folding mechanism further includes a connecting member, and the ends of the two connecting rods far from the wing ribs are both hinged to the connecting member.

6. The variable-span wing according to claim 5, characterized in that, The folding mechanism further includes a first rotating shaft, and the end of the connecting rod far from the wing rib is hinged to the connecting member through the first rotating shaft.

7. The variable-span wing according to claim 1, characterized in that, The folding mechanism further includes a second rotating shaft and a mounting seat. A second rotating shaft is arranged at each end of each connecting rod opposite to the wing rib, and each second rotating shaft is rotatably connected to a mounting seat. Each mounting seat is fixedly connected to the wing rib opposite to the connecting rod. The elastic member is a torsion spring, and the torsion spring is sleeved on the second rotating shaft, and the two ends of the torsion spring are respectively connected to the mounting seat and the second rotating shaft.

8. An aircraft, characterized in that, Comprising a variable-span wing according to any one of claims 1-7.

Images