A rearwardly movable flap
By designing a rearward-movable flap, and utilizing telescopic drive components and a hinged structure to achieve rearward movement and downward deflection of the rear flap, the problem of insufficient lift enhancement in existing technologies is solved, thereby improving the lift and endurance performance of the aircraft.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI SENZHIYUAN INFORMATION TECHNOLOGY CO LTD
- Filing Date
- 2025-09-25
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technology's rear flaps only support simple downward deflection. The limited wing area of small and medium-sized electric aircraft results in a small rear flap area and limited lift enhancement.
Design a rearward-movable flap. By setting a telescopic drive between the wing body and the rear flap, the rear flap can be moved backward and deflected downward, increasing the range of movement and deflection angle of the rear flap. The linkage between the telescopic electric cylinder and the hinge structure is used to enhance airflow smoothness and lift effect.
It improves the lift performance of the aircraft, reduces energy consumption, extends the range, and enhances the taxiing assistance performance of the vertical takeoff and landing electric aircraft.
Smart Images
Figure CN224528966U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aircraft wing technology, specifically a rearward-movable flap. Background Technology
[0002] Flaps are movable devices at the edge of an aircraft wing. They deflect downwards to change the wing shape, primarily increasing lift, especially effective during low-speed flight (such as takeoff and landing). With the widespread application of aviation technology and continuous innovation to meet current needs, some vertical takeoff and landing (VTOL) electric aircraft (such as tiltrotor UAVs) with rear flaps have appeared on the market. These VTOL aircraft have wings and rear flaps primarily because relying solely on vertical takeoff and landing significantly increases the aircraft's initial power output and energy consumption. Using a conventional fixed-wing, runway-assisted takeoff and landing method significantly reduces energy consumption, thereby extending its range and continuous operational capability.
[0003] However, currently, existing rear flaps only support simple downward deflection. Since the main wing area of small and medium-sized electric aircraft is limited, and the area of the rear flaps on the wings is also relatively small, the lift increase provided to the wings after deflection is relatively limited. From the perspective of existing technology, as long as the rearward movement of the rear flaps is extended within a reasonable range, the lift coefficient of the wings and the aircraft will be significantly improved. Therefore, we designed a rearward-movable flap to solve and improve the above-mentioned problems. Utility Model Content
[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract, and the title, and such simplifications or omissions should not be used to limit the scope of this utility model.
[0005] Therefore, the purpose of this utility model is to provide a rearward-movable flap to solve the problem mentioned in the background art that the rear flap in the prior art basically only supports a simple downward deflection function. Since the main wing area of small and medium-sized electric aircraft is limited, and the area of the rear flap equipped on the wing is also relatively small, the lift force given to the wing by the rear flap after deflection is also relatively limited.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a retractable flap, comprising a wing body and a rear flap located at the swept-back edge of the wing body. The wing body and the rear flap have a natural transition and sweep-back extension when not retracting. The swept-back edge of the wing body has a positioning groove that matches the root of the rear flap. A telescopic drive component is provided inside the upper part of the wing body. The output end of the telescopic drive component is longitudinally rotatably connected to the upper end of the root of the rear flap. A connecting lug is fixed at the bottom of the rear flap near the positioning groove. A flap rear bridge support rod is longitudinally rotatably connected to the lower end of the connecting lug. The upper half of the flap rear bridge support rod slides linearly and extends and retracts inside the wing body. A second telescopic drive component is also provided inside the wing body for driving the flap rear bridge support rod to extend and retract linearly.
[0007] As a preferred embodiment of the retractable flap described in this utility model, the wing body has an internal mounting cavity, and both the first and second telescopic drive components are installed inside the mounting cavity. The upper half of the flap rear axle support rod slides linearly against the inner sidewall of the mounting cavity.
[0008] In a preferred embodiment of the retractable flap described in this utility model, the first and second telescopic drive components are telescopic electric cylinders.
[0009] In a preferred embodiment of the retractable flap described in this utility model, the inner end of the cylinder of the telescopic drive component is longitudinally rotatably connected to the interior of the mounting cavity via a hinge seat, and the piston rod end of the telescopic drive component is longitudinally rotatably connected to the rear flap via a hinge shaft.
[0010] As a preferred embodiment of the retractable flap described in this utility model, the swept-back edge of the wing body also has a clearance hole connecting the mounting cavity and the placement groove, and the placement groove and the root of the rear flap are arc-shaped.
[0011] As a preferred embodiment of the retractable flap described in this utility model, the bottom of the wing body also has a telescopic hole communicating with the interior of the mounting cavity, and the flap rear bridge support rod is matched and passed through the inside of the telescopic hole.
[0012] In a preferred embodiment of the repositionable flap described in this utility model, the lower end of the connecting lug and the lower end of the flap rear bridge support are rotatably connected by a hinge pin, and a triangular support structure is formed between the connecting lug, the flap rear bridge support, and the rear flap.
[0013] As a preferred embodiment of the retractable flap described in this utility model, the rear flap has a swept-back arc-shaped through groove between its root and the return groove after being moved and adjusted, and the upper part of the swept-back wing edge of the wing body also has an extended protruding beak that connects to the return groove.
[0014] As a preferred embodiment of the retractable flap described in this utility model, the flap rear bridge support and connecting lug are made of aluminum alloy, carbon fiber composite material or titanium alloy.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This type of rearward-movable flap has the characteristics of simple and stable structure and good practicality. Through the drive and simple linkage unit, the wing body and the rear flap form a rearward adjustable coordinated action. For example, when the vertical take-off and landing electric aircraft takes off and uses the wing body for take-off assistance, during this process, the first and second telescopic drive components will push the rear flap to move backward and downward. With the cooperation of the flap rear bridge support, connecting trunnion, etc., the rear flap forms a rearward and downward deflection action. The maximum downward deflection angle is 20°. After deflection, the air pressure under the rear flap is significantly enhanced, while the pressure on the upper part of the wing is reduced. Moreover, the excess airflow turbulence can pass naturally through the swept-back arc-shaped channel and cooperate with the downflow to form an independent lift field at the end of the rear flap, which significantly improves the lift of the aircraft and further enhances the take-off and landing performance of the aircraft with take-off assistance. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the external structure of the wing body and the rear flap of this utility model.
[0017] Figure 2 This is a schematic diagram of the internal structure of the wing body and the rear flap of the present invention;
[0018] Figure 3 This is a schematic diagram of the airflow field after the rear flap of this utility model deflects.
[0019] Figure 4 This is a schematic diagram of the movement structure of the rear flap during the deflection stage of this utility model;
[0020] Figure 5 This is a schematic diagram of the overall side view of the wing structure of this utility model.
[0021] In the diagram: 100, main wing body; 110, mounting cavity; 120, placement slot; 130, clearance hole; 140, telescopic hole; 200, rear flap; 300, telescopic drive component one; 310, hinge seat; 320, hinge shaft component one; 400, flap rear axle support rod; 410, connecting lug; 420, hinge shaft component two; 500, telescopic drive component two. Detailed Implementation
[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0023] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0025] Figures 1-5 The diagram shown is a complete structural schematic of a rearward-movable flap according to this utility model. Please refer to [link / reference]. Figures 1-5 This embodiment of a retractable flap includes a wing body 100 and a rear flap 200 located at the swept-back edge of the wing body 100. The wing body 100 and the rear flap 200 have a natural transition and sweep-back extension when not retracted. The swept-back edge of the wing body 100 has a return groove 120 that matches the root of the rear flap 200. A telescopic drive component 300 is provided inside the upper part of the wing body 100. The output end of the telescopic drive component 300 is longitudinally rotatably connected to the upper end of the root of the rear flap 200. A connecting lug 410 is fixed at the bottom of the rear flap 200 near the return groove 120. A flap rear bridge support rod 400 is longitudinally rotatably connected to the lower end of the connecting lug 410. The upper half of the flap rear bridge support rod 400 slides and extends linearly inside the wing body 100. A second telescopic drive component 500 is also provided inside the wing body 100 to drive the flap rear bridge support rod 400 to extend and retract linearly.
[0026] In this embodiment, the wing body 100 has a mounting cavity 110 inside. Telescopic drive component 300 and telescopic drive component 500 are both housed inside the mounting cavity 110. The upper half of the flap rear axle support rod 400 slides linearly along the inner wall of the mounting cavity 110. The flap rear axle support rod 400 can be slidably connected to the side wall of the mounting cavity 110 via a slider. The side wall of the mounting cavity 110 has a groove that matches the slider. Telescopic drive component 300 and telescopic drive component 500 are telescopic electric cylinders. Compared to hydraulic rods, telescopic electric cylinders offer higher positioning accuracy and are lighter. Furthermore, they can directly utilize the power supply of the electric UAV platform. The output stroke and opening / closing of the telescopic electric cylinders are controlled in real-time via the aircraft platform's central control terminal.
[0027] In this embodiment, the inner end of the cylinder of the telescopic drive component 300 is longitudinally rotatably connected to the interior of the mounting cavity 110 via a hinge seat 310, and the piston rod end of the telescopic drive component 300 is longitudinally rotatably connected to the rear flap 200 via a hinge shaft 320. The swept-back edge of the wing body 100 also has a clearance hole 130 communicating with the mounting cavity 110 and the return groove 120, and the return groove 120 and the root of the rear flap 200 are arc-shaped matched. The bottom of the wing body 100 also has a telescopic hole 140 communicating with the interior of the mounting cavity 110, and the flap rear bridge support rod 400 is matched and passed through the inner side of the telescopic hole 140. The lower end of the connecting trunnion 410 and the lower end of the flap rear bridge support rod 400 are rotatably connected via a hinge shaft 420, and a triangular support structure is formed between the connecting trunnion 410, the flap rear bridge support rod 400, and the rear flap 200. After the rearward adjustment, the rear flap 200 has a swept-back arc-shaped channel between its root and the return slot 120. The upper part of the swept-back wing edge of the wing body 100 also has an extended protruding beak that connects to the return slot 120. This design allows the rear flap 200 to move and retract smoothly. Most importantly, after extension, the airflow can smoothly pass through the swept-back arc-shaped channel. Specifically, in this embodiment, when the vertical takeoff and landing electric aircraft takes off and uses the wing body 100 for takeoff assistance, during this process, the first telescopic drive component 300 and the second telescopic drive component 500 will push the rear flap 200 to move backward and downward. With the cooperation of the flap rear bridge support 400, connecting trunnion 410, etc., the rear flap 200 will move backward and deflect downward. The maximum downward deflection angle is 20°. After deflection, the air pressure under the rear flap 200 is significantly enhanced, while the pressure on the upper part of the wing is reduced. In addition, the excess airflow turbulence can pass naturally through the swept-back arc-shaped channel and cooperate with the downflow to form an independent lift field at the end of the rear flap 200, so that the lift of the aircraft is significantly improved.
[0028] Furthermore, the flap rear axle strut 400 and connecting trunnion 410 are made of aluminum alloy, carbon fiber composite material, or titanium alloy. It is understandable that aluminum alloy, carbon fiber composite material, or titanium alloy are all lightweight, high-strength materials commonly used in current aerospace technology, and the choice can be made based on specific circumstances in practical applications.
[0029] In summary, the rearward-movable flap of this embodiment, when in use, drives the wing body 100 and the rear flap 200 to form an adjustable rearward movement through a drive and simple linkage unit. For example, when the vertical takeoff and landing electric aircraft takes off and uses the wing body 100 for takeoff and landing assistance, the telescopic drive unit 1 300 and telescopic drive unit 2 500 will push the rear flap 200 to move backward and downward. With the cooperation of the flap rear bridge support 400, connecting trunnion 410, etc., the rear flap 200 will form a rearward movement and downward deflection action. The maximum downward deflection angle is 20°. After deflection, the air pressure under the rear flap 200 is significantly enhanced, while the pressure on the upper part of the wing is reduced. In addition, the excess airflow turbulence can pass naturally through the swept-back arc-shaped channel and cooperate with the downflow to form an independent lift field at the end of the rear flap 200, which significantly improves the lift of the aircraft and further enhances the takeoff and landing performance of the aircraft with takeoff and landing assistance.
[0030] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A retractable flap, characterized in that, The wing body (100) includes a wing body (100) and a rear flap (200) located at the swept-back edge of the wing body (100). The wing body (100) and the rear flap (200) have a natural sweep-back extension when not shifted backward. The swept-back edge of the wing body (100) has a return groove (120) that matches the root of the rear flap (200). A telescopic drive unit (300) is provided above the interior of the wing body (100). The output end of the telescopic drive unit (300) connects to the rear flap (200). The upper part of the root of the 00) is longitudinally rotatably connected. The bottom of the rear flap (200) and the part near the placement groove (120) is fixed with a connecting ear arm (410). The lower end of the connecting ear arm (410) is longitudinally rotatably connected with the flap rear bridge support rod (400). The upper half of the flap rear bridge support rod (400) slides and extends linearly inside the wing body (100). The wing body (100) is also provided with a telescopic drive component two (500) for driving the flap rear bridge support rod (400) to extend and retract linearly.
2. A retractable flap according to claim 1, characterized in that: The wing body (100) has an installation cavity (110) inside. The first telescopic drive component (300) and the second telescopic drive component (500) are both installed inside the installation cavity (110). The upper half of the flap rear axle support rod (400) slides linearly on the inner wall of the installation cavity (110).
3. A retractable flap according to claim 1, characterized in that: The telescopic drive component one (300) and the telescopic drive component two (500) are telescopic electric cylinders.
4. A retractable flap according to claim 1, characterized in that: The inner end of the cylinder of the telescopic drive component (300) is longitudinally rotatably connected to the inside of the mounting cavity (110) through the hinge seat (310), and the piston rod end of the telescopic drive component (300) is longitudinally rotatably connected to the rear flap (200) through the hinge shaft component (320).
5. A retractable flap according to claim 1, characterized in that: The swept-back edge of the wing body (100) also has a clearance hole (130) that connects the mounting cavity (110) and the return groove (120), and the return groove (120) and the root of the rear flap (200) are arc-shaped matched.
6. A retractable flap according to claim 1, characterized in that: The bottom of the wing body (100) also has a telescopic hole (140) that communicates with the interior of the mounting cavity (110), and the flap rear axle support rod (400) is fitted inside the telescopic hole (140).
7. A retractable flap according to claim 1, characterized in that: The lower end of the connecting lug (410) and the lower end of the flap rear axle support (400) are rotatably connected by a hinge pin (420), and a triangular support structure is formed between the connecting lug (410), the flap rear axle support (400) and the rear flap (200).
8. A retractable flap according to claim 1, characterized in that: After the rear flap (200) is adjusted backward, a swept arc-shaped through slot is left between its root and the return slot (120). The upper part of the swept wing edge of the wing body (100) also has an extended convex beak that connects to the return slot (120).
9. A retractable flap according to claim 1, characterized in that: The flap rear axle support rod (400) and connecting lug (410) are made of aluminum alloy, carbon fiber composite material or titanium alloy.