A tandem rotor helicopter with a shock absorbing and noise reducing landing gear

Abstract

The utility model discloses a longitudinal formula double rotor helicopter with shock attenuation and noise reduction landing gear relates to landing gear shock attenuation and noise reduction technical field, including helicopter main part, the bottom fixed mounting of helicopter main part has and falls the subassembly, and the landing subassembly includes the positioning stand, the bottom swing joint of positioning stand has the support wheel, the top swing joint of support wheel has the first electric cylinder, one end of first electric cylinder swing joint has the link rod, the utility model discloses a first electric cylinder to prop up the support wheel, when the support wheel and the ground contact, first electric cylinder can adjust the angle of support wheel, make the support wheel and the ground contact can keep in the inclined state first, subsequently in the process of continuing to fall, through the angle adjustment to carry out the buffer, make the support wheel and the ground between will not produce the excessive friction, play the role of protecting landing subassembly.

Description

Technical Field

[0001] This utility model relates to the field of landing gear vibration reduction and noise reduction technology, and in particular to a tandem twin-rotor helicopter with vibration reduction and noise reduction landing gear. Background Technology

[0002] A tandem rotor helicopter has a rotor pylon at the front and rear of the fuselage. The two rotors are mounted on the two pylons respectively. The two rotors are identical but rotate in opposite directions, and their reaction torques can balance each other.

[0003] However, in the existing technology, when a helicopter takes off and lands, due to the large weight of the helicopter, the landing gear is prone to friction with the ground. When the landing gear contacts the ground, the lack of an effective shock absorption structure leads to strong friction between the landing gear and the ground, which generates a lot of noise. Furthermore, the friction can also cause excessive wear of the landing gear, resulting in a shorter service life. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that the landing gear easily rubs against the ground during takeoff and landing, and that the lack of an effective shock-absorbing structure when the landing gear contacts the ground leads to strong friction and generates a lot of noise. The invention proposes a tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear, comprising a helicopter body, wherein a landing assembly is fixedly installed at the bottom of the helicopter body; The landing assembly includes a positioning frame, with a support wheel rotatably connected to the bottom of the positioning frame, and a first electric cylinder rotatably connected to the top of the support wheel. One end of the first electric cylinder is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to one side of the positioning frame. A movable plate is rotatably connected to the top of the positioning frame, and a positioning piece is rotatably connected to the top of the movable plate. The positioning piece is fixedly installed on the bottom of the helicopter body, and a reinforcing piece is fixedly installed at the junction of the positioning piece and the helicopter body.

[0006] Preferably, a spherical connector is rotatably connected to one side of the end of the positioning frame, and the other end of the spherical connector is rotatably connected to the positioning piece.

[0007] Preferably, the movable plate is located at one end of the bottom of the positioning piece, and the other end of the bottom of the positioning piece is rotatably connected to a deflector plate.

[0008] Preferably, the other end of the deflector plate is rotatably connected to the positioning frame, and the deflector plate and the movable plate are located on both sides of the positioning frame.

[0009] Preferably, a second electric cylinder is provided between the deflector plate and the movable plate, and one end of the piston rod of the second electric cylinder is rotatably connected to the positioning frame.

[0010] Preferably, a limit rod is fixedly connected between the movable plate and the deflector plate, and the limit rod is rotatably installed inside the positioning plate.

[0011] Preferably, a third electric cylinder is rotatably connected to the outer wall of the limiting rod, and one end of the third electric cylinder is rotatably mounted on one side of the positioning plate.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, a first electric cylinder is set to hold the support wheel in place. When the support wheel contacts the ground, the first electric cylinder can adjust the angle of the support wheel so that the support wheel can be kept in an inclined state when it contacts the ground. Then, during the continued descent, the angle is adjusted to buffer the impact, so that there is no excessive friction between the support wheel and the ground, thus protecting the lifting and lowering assembly. In addition, the use of the movable plate and positioning plate gives the lifting and lowering assembly sufficient room for movement to buffer the impact.

[0013] 2. In this utility model, a second electric cylinder and a third electric cylinder are provided to further adjust the angle of the positioning frame. The second electric cylinder can push the support frame to swing left and right, and the third electric cylinder can push the support frame to swing up and down, so that this lifting assembly can adapt to different ground shapes. Attached Figure Description

[0014] Figure 1 A side view of a tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear is provided for this utility model. Figure 2 A front view of a tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear is provided for this utility model. Figure 3 This utility model presents a three-dimensional structural diagram of one side of the landing assembly of a tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear.

[0015] Legend: 1. Helicopter body; 2. Landing assembly; 21. Positioning frame; 22. Second electric cylinder; 23. Support wheel; 24. Connecting rod; 25. First electric cylinder; 26. Third electric cylinder; 27. Directional plate; 28. Positioning plate; 29. ​​Reinforcing plate; 210. Movable plate; 211. Spherical connector; 212. Limiting rod. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1: As Figure 1 , Figure 2 , Figure 3 As shown, this utility model provides a tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear, including a helicopter body 1, and a landing gear assembly 2 is fixedly installed at the bottom of the helicopter body 1. The landing assembly 2 includes a positioning frame 21. A support wheel 23 is rotatably connected to the bottom of the positioning frame 21. A first electric cylinder 25 is rotatably connected to the top of the support wheel 23. A connecting rod 24 is rotatably connected to one end of the first electric cylinder 25. The other end of the connecting rod 24 is rotatably connected to one side of the positioning frame 21. A movable plate 210 is rotatably connected to the top of the positioning frame 21. A positioning piece 28 is rotatably connected to the top of the movable plate 210. The positioning piece 28 is fixedly installed at the bottom of the helicopter body 1. A reinforcing piece 29 is fixedly installed at the junction of the positioning piece 28 and the helicopter body 1. A spherical connector 211 is rotatably connected to one side of the end of the positioning frame 21. The other end of the spherical connector 211 is rotatably connected to the positioning piece 28. A movable plate 210 is located at one end of the bottom of the positioning piece 28. A deflector plate 27 is rotatably connected to the other end of the bottom of the positioning piece 28. The other end of the deflector plate 27 is rotatably connected to the positioning frame 21. The deflector plate 27 and the movable plate 210 are located on both sides of the positioning frame 21, respectively.

[0019] The specific settings and functions of this embodiment are described below. The landing assembly 2 is installed at the bottom of the helicopter body 1. During takeoff and landing, the support wheel 23 in the landing assembly 2 will contact the ground. When in contact, the first electric cylinder 25 can push the support wheel 23 to rotate around the bottom of the positioning frame 21 to adjust the contact angle between the support wheel 23 and the ground, prevent the support wheel 23 from directly colliding with the ground, play a role in buffering and shock absorption, and the adjustable angle function can avoid large friction between the support wheel 23 and the ground, play a role in noise reduction. The positioning frame 21 is rotatably connected to the positioning piece 28 via the movable plate 210 to ensure the structural stability of the positioning frame 21 itself. The positioning piece 28 is fixedly connected to the helicopter body 1 via the reinforcing piece 29, which improves the structural strength of the entire landing assembly 2 and ensures that it can support the helicopter body 1. The first electric cylinder 25 is rotatably connected to the positioning frame 21 via the connecting rod 24, which can ensure the stability of the first electric cylinder 25. This ensures that the support wheel 23 will not change angle due to external force, thus ensuring the performance of shock absorption and noise reduction. The spherical connector 211 connects the positioning frame 21 and the positioning piece 28 together, ensuring that the rotation range of the positioning frame 21 is not restricted. At the same time, a deflector plate 27 is provided at the other end of the bottom of the positioning piece 28 and connected to the positioning frame 21, which further improves the structural stability of the positioning frame 21.

[0020] Example 2: Figure 2 , Figure 3 As shown, a second electric cylinder 22 is provided between the deflector plate 27 and the movable plate 210. One end of the piston rod of the second electric cylinder 22 is rotatably connected to the positioning frame 21. A limit rod 212 is fixedly connected between the movable plate 210 and the deflector plate 27. The limit rod 212 is rotatably installed inside the positioning piece 28. A third electric cylinder 26 is rotatably connected to the outer wall of the limit rod 212. One end of the third electric cylinder 26 is rotatably installed on one side of the positioning piece 28.

[0021] The overall effect of this embodiment is that the second electric cylinder 22 is installed on the limiting rod 212 and is located on one side of the positioning frame 21. In use, the second electric cylinder 22 can push the positioning frame 21 to swing left and right, directly adjusting the angle of the support wheel 23. A third electric cylinder 26 is also provided on the positioning plate 28. The piston rod of the third electric cylinder 26 is rotatably connected to the limiting rod 212. The third electric cylinder 26 pushes the entire positioning frame 21 to swing in the vertical direction. This method allows the lifting assembly 2 to adapt to different ground shapes.

[0022] The usage and working principle of this device are as follows: During take-off and landing, the support wheel 23 in the landing assembly 2 will contact the ground. When in contact, the first electric cylinder 25 can push the support wheel 23 to rotate around the bottom of the positioning frame 21 to adjust the contact angle between the support wheel 23 and the ground. The second electric cylinder 22 can push the positioning frame 21 to swing left and right to directly adjust the angle of the support wheel 23. A third electric cylinder 26 is also provided on the positioning plate 28. The piston rod of the third electric cylinder 26 is rotatably connected to the limit rod 212. The third electric cylinder 26 pushes the entire positioning frame 21 to swing in the vertical direction. By adjusting the contact angle between the support wheel 23 and the ground, the direct collision between the support wheel 23 and the ground is prevented, thus playing a role in buffering and shock absorption. Furthermore, the adjustable angle function can avoid excessive friction between the support wheel 23 and the ground, thereby reducing noise. The positioning frame 21 and the positioning piece 28 are rotatably connected by a limit rod 212, a movable plate 210 and a deflector plate 27. The positioning piece 28 itself is fixedly connected to the helicopter body 1 through a reinforcing piece 29. This ensures that the positioning piece 28 is rotatably connected to the movable plate 210, thereby improving the structural strength of the entire landing assembly 2 and ensuring that it can support the helicopter body 1.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear, comprising a helicopter body (1), characterized in that: The landing assembly (2) is fixedly installed at the bottom of the helicopter body (1). The landing assembly (2) includes a positioning frame (21), with a support wheel (23) rotatably connected to the bottom of the positioning frame (21), and a first electric cylinder (25) rotatably connected to the top of the support wheel (23). One end of the first electric cylinder (25) is rotatably connected to a connecting rod (24), and the other end of the connecting rod (24) is rotatably connected to one side of the positioning frame (21). A movable plate (210) is rotatably connected to the top of the positioning frame (21), and a positioning piece (28) is rotatably connected to the top of the movable plate (210). The positioning piece (28) is fixedly installed at the bottom of the helicopter body (1), and a reinforcing piece (29) is fixedly installed at the junction of the positioning piece (28) and the helicopter body (1).

2. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear according to claim 1, characterized in that: A spherical connector (211) is rotatably connected to one side of the end of the positioning frame (21), and the other end of the spherical connector (211) is rotatably connected to the positioning piece (28).

3. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear according to claim 1, characterized in that: The movable plate (210) is located at one end of the bottom of the positioning piece (28), and the other end of the bottom of the positioning piece (28) is rotatably connected to the deflector plate (27).

4. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear according to claim 3, characterized in that: The other end of the deflector plate (27) is rotatably connected to the positioning frame (21), and the deflector plate (27) and the movable plate (210) are located on both sides of the positioning frame (21).

5. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear according to claim 3, characterized in that: A second electric cylinder (22) is provided between the deflector plate (27) and the movable plate (210), and one end of the piston rod of the second electric cylinder (22) is rotatably connected to the positioning frame (21).

6. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear according to claim 1, characterized in that: A limiting rod (212) is fixedly connected between the movable plate (210) and the deflector plate (27), and the limiting rod (212) is rotatably installed inside the positioning piece (28).

7. A tandem twin-rotor helicopter with shock-absorbing and noise-reducing landing gear according to claim 6, characterized in that: A third electric cylinder (26) is rotatably connected to the outer wall of the limiting rod (212), and one end of the third electric cylinder (26) is rotatably mounted on one side of the positioning plate (28).

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