A model airplane with a new duct structure

Abstract

The utility model discloses a model airplane adopting novel duct piece structure, including fuselage, duct piece, the downside of fuselage is equipped with duct piece, and the front end of duct piece is equipped with the air inlet, and the rear end of duct piece is equipped with the engine, and the downside of fuselage is equipped with the accommodation cavity, and duct piece is equipped with the air duct cavity, and the accommodation cavity of fuselage and the air duct cavity of duct piece jointly constitute the inner chamber for installing spare parts, and the side of duct piece is equipped with detachable grating, and the upper and lower ends of grating are connected with fuselage and duct piece respectively. The utility model discloses the structural design of the combination of duct piece and fuselage, guarantees the sufficient air intake, can also avoid causing the fuselage thickness to be too thick, and the rear end of duct piece is detachable, and the side is equipped with detachable grating, and the rudder, PCB circuit board and other spare parts of inner chamber can be maintained and replaced by dismantling grating, need not to dismantle fuselage or duct piece, and the operation is very convenient, greatly reduces the dismounting difficulty of spare parts in the body.

Description

Technical Field

[0001] This utility model relates to a model aircraft, and more particularly to a model aircraft using a novel ducted structure. Background Technology

[0002] Model aircraft is a general term for various aircraft models, including model airplanes and other model flying machines. Model airplanes use foam fuselages and are powered by engines. Based on the engine's mounting location, current model airplanes are mainly divided into two types: those with the engine mounted in the nose and those with the engine mounted in the tail. Since model airplanes typically crash nose-first, engines mounted in the nose are easily damaged, while those mounted in the tail avoid this problem. However, mounting the engine in the tail requires adding a duct to the fuselage for engine air intake. Chinese utility model patent CN209123342U discloses a bubble-blowing fixed-wing model airplane with a duct running from front to back on the bottom of the fuselage, with the duct's front opening located in the middle of the fuselage, near the front. If the duct's cross-sectional width is too small, the air intake will be insufficient, affecting the rear engine's intake; conversely, if the duct's cross-sectional thickness is too large, it will increase the aircraft's thickness, affecting not only the aesthetics but also flight performance. Therefore, we propose a model aircraft with a novel ducted component structure. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a model airplane with a novel duct structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A model aircraft with a novel ducted structure includes a fuselage and a duct. The duct is located on the lower side of the fuselage. The front end of the duct has an air inlet, and the rear end of the duct has an engine. The lower side of the fuselage has a receiving cavity, and the duct has an air duct cavity. The receiving cavity of the fuselage and the air duct cavity of the duct together constitute an inner chamber for installing components. The duct includes a front end and a detachable rear end. A detachable grille is provided on the side of the rear end of the duct. The upper and lower ends of the grille are respectively connected to the fuselage and the duct. The components in the inner chamber can be repaired or replaced by disassembling the grille.

[0005] Specifically, the upper end of the grille is provided with a connecting ear, the lower end of the grille is provided with a lower side insertion part, the connecting ear of the grille is connected to the body by screws, and the lower side insertion part of the grille is inserted into the side of the duct.

[0006] Specifically, the lower side of the body is provided with a recessed portion, and a connecting piece for connecting with the connecting lug screw of the grille is fixedly provided in the recessed portion.

[0007] Specifically, the body has an upper insertion channel on the inner side of the recessed portion, and the upper insertion portion of the grille is inserted into the upper insertion channel.

[0008] Specifically, the culvert component has a side opening for installing the grating component, the edge of the side opening is provided with a positioning groove, and a lower insertion channel is provided at the positioning groove. The lower insertion part of the grating component is inserted into the lower insertion channel.

[0009] Specifically, the culvert has side openings on both the left and right sides, and the two grid members are symmetrically arranged on the left and right sides of the culvert.

[0010] Specifically, the duct component has a first slot for passing through the front wheel bracket and a second slot for passing through the rear wheel bracket.

[0011] The beneficial effects of this utility model are as follows: This utility model adopts a structural design that combines the duct component with the fuselage, which not only ensures sufficient air intake, but also avoids excessive fuselage thickness. The rear end of the duct component is detachable, and the side is equipped with a detachable grille. The grille can be removed to repair and replace components such as the servo motor and PCB circuit board in the internal cavity without disassembling the fuselage or duct component, which is very convenient and greatly reduces the difficulty of disassembling and assembling internal components. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of this utility model after the grille component has been removed.

[0016] Figure 5 This is a schematic diagram of the bottom structure of the fuselage.

[0017] Figure 6 This is a structural diagram of a culvert when a grating is installed.

[0018] Figure 7 This is a structural diagram of a culvert without the installation of the grating.

[0019] Figure 8This is a structural schematic diagram of the grating component.

[0020] Figure 9 This is a schematic diagram of the structure of the rear end of the culvert component of this utility model.

[0021] Reference numerals: 10. Fuselage; 101. Connecting piece; 11. Receiving cavity; 12. Recessed seat; 13. Upper insertion channel; 20. Duct component; 201. Front end; 202. Rear end; 21. Air inlet; 22. Air duct cavity; 23. Side opening; 24. Positioning groove; 25. Lower insertion channel; 26. First slot; 27. Second slot; 30. Engine; 40. Grille component; 41. Connecting ear; 42. Upper insertion part; 43. Lower insertion part; 50. Front wheel bracket. Detailed Implementation

[0022] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0023] Combined with appendix Figure 1 To be continued Figure 5 As shown, a model aircraft employing a novel ducted structure includes a fuselage 10 and a duct 20. The duct 20 is located on the underside of the fuselage 10, with an air inlet 21 at its front end and an engine 30 at its rear end, as illustrated in the attached diagram. Figure 5 As shown, the fuselage 10 has a receiving cavity 11 on its lower side, and the duct 20 has an air duct cavity 22. The receiving cavity 11 of the fuselage 10 and the air duct cavity 22 of the duct 20 together form an inner cavity for installing components such as servos and PCB circuit boards. This structural design of combining the duct 20 with the fuselage 10 ensures sufficient air intake while avoiding excessive fuselage thickness.

[0024] As attached Figure 1 As shown, the duct component 20 includes a front end portion 201 and a detachable rear end portion 202. A detachable grille 40 is provided on the side of the rear end portion 202 of the duct component 20. The upper and lower ends of the grille 40 are respectively connected to the fuselage 10 and the duct component 20, as shown in the attached diagram. Figure 9 As shown, by disassembling the rear end of the duct component 20 and its grille component 40, the servo motor, PCB circuit board and other components in the inner cavity can be repaired and replaced without disassembling the fuselage 10 or the duct component 20. The operation is very convenient and greatly reduces the difficulty of disassembling and assembling the internal components.

[0025] As attached Figure 8 As shown, the upper end of the grille 40 is provided with a connecting ear 41, and the lower end of the grille 40 is provided with a lower side insertion part 43. The connecting ear 41 of the grille 40 is connected to the body 10 by screws, and the lower side insertion part 43 of the grille 40 is inserted into the side of the duct member 20. (See attached diagram) Figure 5 As shown, the lower side of the fuselage 10 is provided with a recessed portion 12, as shown in the attached diagram. Figure 4 As shown, a connecting piece 101 for screw connection with the connecting lug 41 of the grille member 40 is fixedly provided at the recessed portion 12. (See attached diagram) Figure 4 and attached Figure 8 As shown, the fuselage 10 has an upper insertion channel 13 on the inner side of the recessed portion 12, and the upper insertion portion 42 of the grille 40 is inserted into the upper insertion channel 13.

[0026] Combined with appendix Figure 7 and attached Figure 8 As shown, the culvert 20 has a side opening 23 for installing the grille 40. The edge of the side opening 23 is provided with a positioning groove 24. A lower insertion channel 25 is provided at the positioning groove 24. The lower insertion part 43 of the grille 40 is inserted into the lower insertion channel 25.

[0027] When installing the grille 40, first insert the lower insertion part 43 of the grille 40 into the lower insertion channel 25 at the side opening 23 of the duct 20, then flip the grille 40 toward the body 10. The body 10 is made of plastic foam. When the grille 40 is flipped, the upper insertion channel 13 can be inserted into the upper insertion channel 13 of the body 10. Finally, the connecting ear 41 of the grille 40 is locked to the connecting piece 101 of the body 10 with screws.

[0028] Combined with appendix Figure 1 and attached Figure 6 As shown, side openings 23 are provided on both the left and right sides of the culvert component 20, and two grid components 40 are symmetrically arranged on the left and right sides of the culvert component 20. (See attached diagram.) Figure 1 and attached Figure 8 As shown, the duct member 20 has a first slot 26 for passing through the front wheel bracket 50 and a second slot 27 for passing through the rear wheel bracket (Note: not shown in the attached figure).

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0031] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A model aircraft employing a novel ducted structure, comprising a fuselage (10) and a duct (20), wherein the duct (20) is disposed on the lower side of the fuselage (10), the front end of the duct (20) is provided with an air inlet (21), and the rear end of the duct (20) is provided with an engine (30), characterized in that: The lower side of the fuselage (10) is provided with a receiving cavity (11), and the duct component (20) is provided with a duct cavity (22). The receiving cavity (11) of the fuselage (10) and the duct cavity (22) of the duct component (20) together constitute an inner cavity for installing components. The duct component (20) includes a front end (201) and a detachable rear end (202). A detachable grille (40) is provided on the side of the rear end (202) of the duct component (20). The upper and lower ends of the grille (40) are respectively connected to the fuselage (10) and the duct component (20). The components in the inner cavity can be repaired or replaced by disassembling the grille (40).

2. The model aircraft adopting a novel ducted structure according to claim 1, characterized in that: The upper end of the grille (40) is provided with a connecting ear (41), and the lower end of the grille (40) is provided with a lower side insertion part (43). The connecting ear (41) of the grille (40) is connected to the body (10) by screws, and the lower side insertion part (43) of the grille (40) is inserted into the side of the duct (20).

3. A model aircraft employing a novel ducted structure according to claim 2, characterized in that: The lower side of the body (10) is provided with a recessed seat (12), and a connecting piece (101) for screw connection with the connecting ear (41) of the grille (40) is fixedly provided at the recessed seat (12).

4. A model aircraft employing a novel ducted structure according to claim 3, characterized in that: The body (10) has an upper insertion channel (13) on the inner side of the recess (12), and the upper insertion part (42) of the grille (40) is inserted into the upper insertion channel (13).

5. A model aircraft employing a novel ducted structure according to claim 2, characterized in that: The culvert component (20) has a side opening (23) for installing the grid component (40) on its side. The edge of the side opening (23) is provided with a positioning groove (24). A lower insertion channel (25) is provided at the positioning groove (24). The lower insertion part (43) of the grid component (40) is inserted into the lower insertion channel (25).

6. A model aircraft employing a novel ducted structure according to claim 5, characterized in that: The culvert (20) has side openings (23) on both the left and right sides, and two grid members (40) are symmetrically arranged on the left and right sides of the culvert (20).

7. A model aircraft employing a novel ducted structure according to claim 1, characterized in that: The duct component (20) has a first slot (26) for passing through the front wheel bracket and a second slot (27) for passing through the rear wheel bracket.

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