Honeycomb-bird-imitating ornithopter driving mechanism with adjustable flapping amplitude

Abstract

The utility model discloses a driving mechanism of a hummingbird-imitating flapping-wing aircraft with adjustable flapping amplitude, which relates to the technical field of aircraft driving mechanisms, and particularly comprises a gear transmission system driven by a motor, the gear transmission system comprises an input gear, the input gear is in meshing transmission with an eccentric gear through an intermediate gear, and the eccentric gear is driven by a motor. An eccentric pin is arranged on the eccentric gear, the eccentric pin rotates along with the eccentric gear to move in a notch formed in a follower plate in a limited mode, the follower plate is connected to the guide rail in a sliding mode, racks are arranged on the two side faces of the follower plate, and the racks are in meshing transmission with rocker arm gears arranged on the flapping wings. The eccentric distance can be adjusted by adjusting the eccentric pin on the eccentric gear, so that the moving distance of the follower plate is adjusted, the purpose of adjusting the amplitude of the flapping wing is achieved, and the flapping wing is suitable for different task scenes.

Description

Technical Field

[0001] This utility model relates to the field of aircraft drive mechanism technology, specifically to a hummingbird flapping wing drive mechanism with adjustable flapping amplitude. Background Technology

[0002] Ornithopter is a new concept of biomimetic aircraft that imitates the flapping flight of birds, insects, bats and other creatures. It is designed by combining multiple disciplines and has the characteristics of flexible flight, high efficiency, strong stability and good stealth. With these characteristics, ornithopter can conduct low-visibility reconnaissance and surveillance in complex terrain and urban environments. Therefore, it can be used for military reconnaissance and surveillance, disaster relief, detection of forests, wetlands and other ecological environments.

[0003] Traditional flapping-wing aircraft have a fixed flapping amplitude. In different mission scenarios, such as surveillance, reconnaissance, or patrol, the nature of the mission varies, and choosing the same flapping amplitude often affects the final execution effect. For example, when the flight mission is mainly hovering, increasing the flapping amplitude increases thrust and thus improves the maneuverability of the aircraft. When the mission is mainly cruising, the flapping amplitude can be reduced to reduce energy consumption during hovering, extend flight time, and thus enhance the aircraft's cruising capability. Therefore, it is very meaningful to design a drive system that can adjust the flapping amplitude. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To overcome the shortcomings of existing technologies, a hummingbird flapping-wing aircraft drive mechanism with adjustable flapping amplitude is proposed, which can adjust the flapping amplitude of the wings.

[0006] (II) Technical Solution

[0007] This utility model is achieved through the following technical solution: This utility model proposes a drive mechanism for a hummingbird flapping-wing aircraft with adjustable flapping amplitude, including a gear transmission system driven by a motor. The gear transmission system includes an input gear, which meshes with an eccentric gear through an intermediate gear. An eccentric pin is provided on the eccentric gear. The eccentric pin moves and is limited to a slot in a follower plate as the eccentric gear rotates. The follower plate is slidably connected to a guide rail. Racks are provided on both sides of the follower plate, and the racks mesh with a rocker arm gear provided on the flapping wing.

[0008] Furthermore, the eccentric gear is provided with a plurality of connecting holes along its radial direction, and the eccentric pin is connected to the connecting holes.

[0009] Furthermore, the intermediate gear includes a first intermediate gear and a second intermediate gear, the first intermediate gear and the second intermediate gear rotate synchronously through a transmission shaft, and the first intermediate gear meshes with the input gear for transmission.

[0010] Furthermore, the diameter of the first intermediate gear is larger than the diameter of the second intermediate gear.

[0011] Furthermore, the guide rail includes two parallel sliding rods that pass through the follower plate.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This utility model discloses a hummingbird flapping-wing aircraft drive mechanism with adjustable flapping amplitude. By adjusting the eccentric pin on the eccentric gear, the eccentricity can be adjusted, thereby adjusting the moving distance of the follower plate and achieving the purpose of adjusting the flapping amplitude, thus making it suitable for different mission scenarios. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the gear transmission system in this utility model.

[0017] 1-Input gear; 2-Intermediate gear; 3-Eccentric gear; 4-Eccentric pin; 5-Follower plate; 6-Guide rail; 7-Rack; 8-Flapping wing; 9-Rocker arm gear; 21-First intermediate gear; 22-Second intermediate gear; 23-Drive shaft. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] like Figures 1-2 The diagram illustrates a flapping amplitude-adjustable hummingbird-inspired flapping-wing aircraft drive mechanism, comprising a gear transmission system driven by a motor. The gear transmission system includes an input gear 1, which meshes with an eccentric gear 3 via an intermediate gear 2. An eccentric pin 4 is provided on the eccentric gear 3, and the eccentric pin 4 moves and is limited to a slot in a follower plate 5 as the eccentric gear 3 rotates. The follower plate 5 is slidably connected to a guide rail 6, and racks 7 are provided on both sides of the follower plate 5. The racks 7 mesh with rocker arm gears 9 provided on the flapping wing 8.

[0020] The eccentric gear 3 has several connecting holes along its radial direction, and the eccentric pin 4 is connected to the connecting holes. The intermediate gear 2 includes a first intermediate gear 21 and a second intermediate gear 22. The first intermediate gear 21 and the second intermediate gear 22 rotate synchronously through a transmission shaft 23. The first intermediate gear 21 meshes with the input gear 1 for transmission. The diameter of the first intermediate gear 21 is larger than the diameter of the second intermediate gear 22. The guide rail 6 includes two parallel sliding rods, which pass through the follower plate 5.

[0021] This utility model discloses a flapping-wing-inspired flight propulsion mechanism with adjustable flapping amplitude. During use, the eccentricity can be adjusted in advance according to different missions. When the flight mission mainly involves hovering, the eccentricity can be set to a larger value to increase the flapping amplitude, increase thrust, and thus enhance the maneuverability. When the mission mainly involves cruising, the eccentricity can be set to a smaller value to reduce the flapping amplitude, reduce energy consumption during hovering, extend flight time, and thus enhance the aircraft's cruising capability. Pins 4 are installed at different connection holes on the eccentric gear 3, which can adjust the distance between the eccentric pins 4 and the center of the eccentric gear 3, i.e., the eccentricity. Due to the different eccentricities, when the eccentric gear 3 rotates, the eccentric pins 4 move different distances in the slot of the follower plate 5, and the follower plate 5 slides different distances along the guide rail 6. As a result, the rocker arm gear 9 rotates at different angles, i.e., the flapping amplitude of the flapping wing 8 is also different. Finally, under the rotation of the eccentric gear 3, the follower plate 5 makes reciprocating linear motion, and finally realizes the up and down flapping function of the flapping wing 8.

[0022] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A drive mechanism for a hummingbird-inspired flapping-wing aircraft with adjustable flapping amplitude, characterized in that: The system includes a gear transmission system driven by an electric motor. The gear transmission system includes an input gear (1), which meshes with an eccentric gear (3) through an intermediate gear (2). An eccentric pin (4) is provided on the eccentric gear (3). The eccentric pin (4) moves and is limited to a slot in a follower plate (5) as the eccentric gear (3) rotates. The follower plate (5) is slidably connected to a guide rail (6). A rack (7) is provided on both sides of the follower plate (5). The rack (7) meshes with a rocker arm gear (9) provided on the flapping wing (8).

2. The flapping amplitude adjustable hummingbird flapping-wing aircraft drive mechanism according to claim 1, characterized in that: The eccentric gear (3) has several connecting holes along its radial direction, and the eccentric pin (4) is connected to the connecting holes.

3. The flapping amplitude adjustable hummingbird flapping-wing aircraft drive mechanism according to claim 1, characterized in that: The intermediate gear (2) includes a first intermediate gear (21) and a second intermediate gear (22). The first intermediate gear (21) and the second intermediate gear (22) rotate synchronously through a transmission shaft (23). The first intermediate gear (21) meshes with the input gear (1) for transmission.

4. The flapping amplitude adjustable hummingbird flapping-wing aircraft drive mechanism according to claim 3, characterized in that: The diameter of the first intermediate gear (21) is greater than the diameter of the second intermediate gear (22).

5. The flapping amplitude adjustable hummingbird flapping-wing aircraft drive mechanism according to claim 1, characterized in that: The guide rail (6) includes two parallel sliding rods, which pass through the follower plate (5).

Images