A tandem rotor helicopter with a fuselage structure incorporating retractable undercarriage bays
Patent Information
- Application Number
- CN202522717654.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-23
AI Technical Summary
[0003]但现有技术中，传统的起落架舱通常在飞行过程中始终暴露在外，这大大增加了飞行时的空气阻力，导致直升机的飞行速度受限，燃油消耗增加，航程缩短，同时，固定的起落架占据了机身下方较大的空间，使得机身内部空间难以得到充分有效地利用
1、本实用新型中，通过设置伸缩机构，在多组一号活动块、多组一号活动座、多组气缸、多组一号轴座、多组异形接块、多组二号活动块、多组一号杆和多组二号杆的配合下，进而可以对起落舱进行收缩，从而能够在飞行时将起落舱缩回存放舱内部，大大减少了空气阻力，有效提高了直升机主体的飞行速度，降低了燃油消耗，增加了直升机主体的航程和续航时间，其次，起落舱缩回存放舱内部后，使得机身下方原本被起落舱占据的空间得以释放，两组存放舱内部空间得到更充分的利用，可根据实际需求搭载更多的乘客、货物或设备，提高了直升机主体的使用灵活性和实用性。
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Figure CN224916171U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tandem twin-rotor helicopter technology, and more particularly to a tandem twin-rotor helicopter with a fuselage structure featuring a retractable landing gear bay. Background Technology
[0002] A tandem rotor helicopter has a rotor pylon at both the front and rear of the fuselage. Two identical rotors are mounted on the two pylons, rotating in opposite directions to balance each other's reaction torque. Typically, the rear rotor is slightly higher than the front rotor to avoid interference. The main advantages of a tandem helicopter are: large payload capacity, compact size, suitability for shipboard operations, and high hovering efficiency.
[0003] However, in existing technologies, traditional landing gear bays are usually exposed during flight, which greatly increases air resistance, resulting in limited helicopter speed, increased fuel consumption, and shortened range. At the same time, fixed landing gear occupies a large space under the fuselage, making it difficult to make full and effective use of the internal space of the fuselage. Utility Model Content
[0004] The purpose of this invention is to solve the problems raised in the prior art by proposing a tandem twin-rotor helicopter with a fuselage structure featuring a retractable landing gear bay.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tandem twin-rotor helicopter with a fuselage structure featuring retractable landing gear bays, comprising a helicopter body and four sets of landing gear bays, with storage bays fixedly installed at both ends of the helicopter body, and two sets of storage bays having telescopic mechanisms inside, and two sets of storage bays having sealing mechanisms at their lower ends. The telescopic mechanism includes four sets of mounting plates, four sets of first rods, and four sets of second rods. Two sets of first movable seats are fixedly mounted on one end of each of the four sets of mounting plates. Two sets of first shaft seats are fixedly mounted on one end of each of the four sets of mounting plates. Cylinders are movably mounted inside each of the first movable seats. Irregularly shaped connecting blocks are movably mounted inside each of the first shaft seats. Three sets of first movable blocks are fixedly mounted on the outer wall of each of the four sets of second rods. Three sets of second movable blocks are fixedly mounted on the outer wall of each of the four sets of first rods. The inner wall of one end of each set of irregularly shaped connecting blocks is fixed to the outer wall of each of the four sets of first rods, and the inner wall of the other end of each set of irregularly shaped connecting blocks is fixed to the outer wall of each of the four sets of second rods.
[0006] Preferably, the sealing mechanism includes four sets of No. 2 movable seats, and the lower end of each storage compartment is hinged with a sealing door. The upper ends of each of the two sets of sealing doors are fixedly installed with two sets of No. 2 shaft seats, and telescopic rods are movably installed inside each of the four sets of No. 2 movable seats.
[0007] Preferably, the four sets of landing bays are respectively installed inside the two sets of storage bays, and the other ends of the four sets of mounting plates are respectively fixed to both ends of the helicopter body.
[0008] Preferably, one end of each of the multiple sets of No. 1 movable blocks and the multiple sets of No. 2 movable blocks is fixed to one end of each of the four sets of landing capsules.
[0009] Preferably, the telescopic ends of the multiple sets of cylinders pass through the elongated holes of the multiple sets of irregularly shaped connecting blocks and are movably connected to the outer walls of the four sets of No. 2 rods.
[0010] Preferably, one end of each of the four sets of telescopic rods is movably connected to the outer wall of each of the four sets of No. 2 shaft seats, and one end of each of the four sets of No. 2 movable seats is fixed to the inner wall of the storage compartment.
[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by setting up a telescopic mechanism, with the cooperation of multiple sets of No. 1 movable blocks, multiple sets of No. 1 movable seats, multiple sets of cylinders, multiple sets of No. 1 shaft seats, multiple sets of irregular connecting blocks, multiple sets of No. 2 movable blocks, multiple sets of No. 1 rods and multiple sets of No. 2 rods, the landing cabin can be retracted. This allows the landing cabin to be retracted into the storage compartment during flight, greatly reducing air resistance, effectively increasing the flight speed of the helicopter body, reducing fuel consumption, and increasing the range and endurance of the helicopter body. Secondly, after the landing cabin is retracted into the storage compartment, the space under the fuselage originally occupied by the landing cabin is released, and the internal space of the two storage compartments is more fully utilized. More passengers, cargo or equipment can be carried according to actual needs, improving the flexibility and practicality of the helicopter body.
[0012] 2. In this utility model, by setting a sealing mechanism, with the cooperation of multiple sets of No. 2 movable seats, multiple sets of No. 2 shaft seats and multiple sets of telescopic rods, the multiple sets of telescopic rods will drive the two sets of sealed doors to move, so that the two sets of sealed doors can be opened or retracted from the separation point of the two sets of storage compartments, thereby opening or sealing the bottom of the two sets of storage compartments. This allows some telescopic mechanisms inside the two sets of storage compartments to extend and retract, while preventing external wind from entering the two sets of storage compartments. Attached Figure Description
[0013] Figure 1 This utility model presents a three-dimensional structural diagram of a tandem twin-rotor helicopter with a retractable landing gear bay fuselage structure. Figure 2 A partial bottom view of a tandem twin-rotor helicopter with a fuselage structure featuring a retractable landing gear bay is provided for this utility model. Figure 3This utility model provides a schematic diagram of the landing cabin and telescopic mechanism structure of a tandem twin-rotor helicopter with a fuselage structure featuring a retractable landing gear bay. Figure 4 This utility model presents a structural schematic diagram of the sealing mechanism for a tandem twin-rotor helicopter with a retractable landing gear bay fuselage structure.
[0014] Legend: 1. Helicopter body; 11. Storage compartment; 12. Landing compartment; 2. Telescopic mechanism; 21. Mounting plate; 22. Movable block No. 1; 23. Movable seat No. 1; 24. Shaft seat No. 1; 25. Cylinder; 26. Irregular joint block; 27. Movable block No. 2; 28. Rod No. 1; 29. Rod No. 2; 3. Sealing mechanism; 31. Movable seat No. 2; 32. Sealed door; 33. Shaft seat No. 2; 34. Telescopic rod. Detailed Implementation
[0015] 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.
[0016] 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.
[0017] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a tandem twin-rotor helicopter with a fuselage structure featuring a retractable landing gear bay, including a helicopter body 1 and four sets of landing bays 12. Storage bays 11 are fixedly installed at both ends of the helicopter body 1. The interior of the two sets of storage bays 11 is provided with a telescopic mechanism 2, and the lower end of the two sets of storage bays 11 is provided with a sealing mechanism 3. The telescopic mechanism 2 includes four sets of mounting plates 21, four sets of first rods 28, and four sets of second rods 29. Two sets of first movable seats 23 are fixedly mounted on one end of each of the four sets of mounting plates 21. Two sets of first shaft seats 24 are fixedly mounted on one end of each of the four sets of mounting plates 21. Cylinders 25 are movably mounted inside each of the sets of first movable seats 23. Irregularly shaped connecting blocks 26 are movably mounted inside each of the sets of first shaft seats 24. Three sets of first movable blocks 22 are fixedly mounted on the outer walls of each of the four sets of second rods 29. Three sets of second movable blocks 27 are fixedly mounted on the outer walls of each of the four sets of first rods 28. Multiple sets of irregularly shaped connecting blocks... The inner wall of one end of the multiple sets of shaped blocks 26 is fixed to the outer wall of the four sets of first rods 28 respectively. The inner wall of the other end of the multiple sets of irregularly shaped blocks 26 is fixed to the outer wall of the four sets of second rods 29 respectively. The four sets of landing cabins 12 are respectively installed inside the two sets of storage cabins 11. The other ends of the four sets of mounting plates 21 are respectively fixed to both ends of the helicopter body 1. One end of the multiple sets of first movable blocks 22 and multiple sets of second movable blocks 27 is respectively fixed to one end of the four sets of landing cabins 12. The telescopic ends of the multiple sets of cylinders 25 pass through the long holes of the multiple sets of irregularly shaped blocks 26 and are movably connected to the outer wall of the four sets of second rods 29 respectively.
[0018] The specific setup and function of this embodiment are described below. Four sets of mounting plates 21 are installed at both ends of the helicopter body 1. Multiple sets of first movable seats 23 and multiple sets of first shaft seats 24 are respectively installed onto the four sets of mounting plates 21. Multiple sets of cylinders 25 are movably installed on their respective first movable seats 23. When the multiple sets of cylinders 25 move, a portion of them will move inside the multiple sets of first movable seats 23. Furthermore, multiple sets of irregularly shaped connecting blocks 26 are movably installed inside the multiple sets of first shaft seats 24, facilitating the movement of the multiple sets of irregularly shaped connecting blocks 26 within the multiple sets of first shaft seats 24. The internal movement of the No. 1 bearing seat 24 is achieved by fixing four sets of No. 1 rods 28 and four sets of No. 2 rods 29 to multiple sets of irregularly shaped connecting blocks 26, and fixing multiple sets of No. 1 movable blocks 22 to multiple sets of No. 2 rods 29. Simultaneously, one end of each set of No. 1 movable blocks 22 is fixed to one end of each of the four landing capsules 12. Multiple sets of No. 2 movable blocks 27 are fixed to the outer wall of the multiple sets of No. 1 rods 28, and one end of each set of No. 2 movable blocks 27 is fixed to one end of each of the multiple landing capsules 12. A portion of the multiple sets of irregularly shaped connecting blocks 26 will be located within the multiple sets of No. 1 bearing seats 26. The internal movement of the 4th set of landing capsules 12 is facilitated by multiple sets of irregularly shaped connecting blocks 26, which, through multiple sets of first-position levers 28 and multiple sets of second-position levers 29, drive multiple sets of second-position movable blocks 27 and multiple sets of first-position movable blocks 22. This allows the landing capsules 12 to move, and the telescopic ends of multiple sets of cylinders 25 are connected to the second-position levers 29. This facilitates the movement of the second-position levers 29, allowing the four landing capsules 12 to be retracted or removed from the two storage compartments 11 during flight. Retracting the landing capsule 12 into the storage compartment 11 greatly reduces air resistance, effectively increases the flight speed of the helicopter body 1, reduces fuel consumption, and increases the range and endurance of the helicopter body 1. Secondly, after the landing capsule 12 is retracted into the storage compartment 11, the space under the fuselage that was originally occupied by the landing capsule 12 is freed up, and the internal space of the two sets of storage compartments 11 is made more fully utilized. More passengers, cargo or equipment can be carried according to actual needs, which improves the flexibility and practicality of the helicopter body 1. Two sets of storage compartments 11 are installed at both ends of the helicopter body 1, and the ends of the helicopter body 1 are reserved with entrances and exits to facilitate the subsequent placement of goods or equipment into the two sets of storage compartments 11, freeing up the internal space of the helicopter body 1 to carry more passengers. The two sets of storage compartments 11 are designed with a smooth streamline shape, similar to the leading edge shape of an aircraft wing, and their front end adopts an arc transition to avoid sharp edges, which can reduce the drag of the helicopter body 1 during flight.
[0019] Example 2: Figure 2 and Figure 4As shown, the sealing mechanism 3 includes four sets of No. 2 movable seats 31. The lower end of the storage compartment 11 is hinged with a sealing door 32. The upper end of each of the two sets of sealing doors 32 is fixedly installed with two sets of No. 2 bearing seats 33. The interior of each of the four sets of No. 2 movable seats 31 is movably installed with a telescopic rod 34. One end of each of the four sets of telescopic rods 34 is movably connected to the outer wall of the four sets of No. 2 bearing seats 33. One end of each of the four sets of No. 2 movable seats 31 is fixed to the inner wall of the storage compartment 11.
[0020] The overall effect of this embodiment is that by installing four sets of No. 2 movable seats 31 on the inner walls of the two sets of storage compartments 11 respectively, and then movably installing a portion of the four sets of telescopic rods 34 on the four sets of No. 2 movable seats 31, it is convenient for a portion of the four sets of telescopic rods 34 to move inside the four sets of No. 2 movable seats 31. Then, by installing four sets of No. 2 shaft seats 33 on the two sets of sealed doors 32, the two sets of sealed doors 32 are hinged to the bottom of the two sets of storage compartments 11. At the same time, the other part of the four sets of telescopic rods 34 is movably assembled with the four sets of No. 2 shaft seats 33, so that the four sets of telescopic rods 34 can drive the two sets of sealed doors 32 to move through the four sets of No. 2 shaft seats 33, thereby driving the opening and closing between the two sets of sealed doors 32 and the two sets of storage compartments 11. This allows the telescopic mechanism 2 inside the two sets of storage compartments 11 to extend and retract, while preventing external wind from entering the interior of the two sets of storage compartments 11.
[0021] The operating method and working principle of this device are as follows: First, by synchronously activating multiple sets of cylinders 25, the extension and retraction ends of the multiple sets of cylinders 25 drive multiple sets of movable blocks 22 through four sets of second rods 29. At the same time, the four sets of second rods 29 also drive multiple sets of irregularly shaped connecting blocks 26 to move inside multiple sets of first bearing seats 24. The multiple sets of irregularly shaped connecting blocks 26 drive multiple sets of movable blocks 27 through four sets of first rods 28. This causes the four sets of first movable blocks 22 and the four sets of second movable blocks 27 to move the four sets of landing capsules 12, so that the four sets of landing capsules 12 move from the outside of the helicopter body 1. Moving the landing capsule 12 into the storage compartment 11 allows it to retract into the storage compartment 11 during flight, greatly reducing air resistance. Finally, by synchronously activating the four sets of telescopic rods 34, the extended ends of the four sets of telescopic rods 34 drive the two sets of sealed doors 32 through the four sets of No. 2 bearings 33. During this time, the two ends of the four sets of telescopic rods 34 move inside the four sets of No. 2 movable seats 31 and in the middle of the four sets of No. 2 bearings 33, respectively, which facilitates the retraction of the two sets of sealed doors 32 and their close contact with the two sets of storage compartments 11, thus sealing the two sets of storage compartments 11.
[0022] The above are merely preferred embodiments of this utility model and are not intended to limit the 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 this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.
Claims
1. A tandem twin-rotor helicopter with a fuselage structure featuring retractable landing gear bays, comprising a helicopter body (1) and four landing gear bays (12), characterized in that: Storage compartments (11) are fixedly installed at both ends of the helicopter body (1). The interior of the two sets of storage compartments (11) is provided with telescopic mechanisms (2), and the lower end of the two sets of storage compartments (11) is provided with sealing mechanisms (3). The telescopic mechanism (2) includes four sets of mounting plates (21), four sets of first rods (28), and four sets of second rods (29). Two sets of first movable seats (23) are fixedly installed at one end of each of the four sets of mounting plates (21). Two sets of first shaft seats (24) are fixedly installed at one end of each of the four sets of mounting plates (21). Cylinders (25) are movably installed inside each of the sets of first movable seats (23). Irregularly shaped connecting blocks (26) are movably installed inside each of the sets of first shaft seats (24). Three sets of first movable blocks (22) are fixedly installed on the outer wall of each of the four sets of second rods (29). Three sets of second movable blocks (27) are fixedly installed on the outer wall of each of the four sets of first rods (28). The inner wall of one end of each set of irregularly shaped connecting blocks (26) is fixed to the outer wall of each of the four sets of first rods (28). The inner wall of the other end of each set of irregularly shaped connecting blocks (26) is fixed to the outer wall of each of the four sets of second rods (29).
2. The tandem twin-rotor helicopter with a retractable landing gear bay according to claim 1, characterized in that: The sealing mechanism (3) includes four sets of No. 2 movable seats (31), and the lower end of the storage compartment (11) is hinged with a sealing door (32). The upper ends of the two sets of sealing doors (32) are fixedly installed with two sets of No. 2 shaft seats (33). The interior of the four sets of No. 2 movable seats (31) is movably installed with telescopic rods (34).
3. A tandem twin-rotor helicopter with a retractable landing gear bay according to claim 1, characterized in that: The four landing bays (12) are respectively installed inside the two storage bays (11), and the other ends of the four mounting plates (21) are respectively fixed to the two ends of the helicopter body (1).
4. A tandem twin-rotor helicopter with a retractable landing gear bay according to claim 3, characterized in that: One end of multiple sets of No. 1 movable blocks (22) and multiple sets of No. 2 movable blocks (27) are respectively fixed to one end of four sets of landing capsules (12).
5. A tandem twin-rotor helicopter with a retractable landing gear bay according to claim 4, characterized in that: The telescopic ends of the multiple sets of cylinders (25) pass through the elongated holes of the multiple sets of irregularly shaped blocks (26) and are movably connected to the outer walls of the four sets of No. 2 rods (29).
6. A tandem twin-rotor helicopter with a retractable landing gear bay according to claim 2, characterized in that: One end of each of the four sets of telescopic rods (34) is movably connected to the outer wall of the four sets of No. 2 shaft seats (33), and one end of each of the four sets of No. 2 movable seats (31) is fixed to the inner wall of the storage compartment (11).