Outer cover structure for ducted fan

Abstract

The utility model discloses an outer cover structure for a ducted fan, and aims to provide an outer cover structure for a ducted fan, which is favorable for reducing noise, and comprises a motor and an annular outer cover, the motor is positioned in the outer cover and is detachably connected to the center of the outer cover, a plurality of hanging lugs are arranged on the outer cover, the hanging lugs are fixedly connected with the outer side wall of the outer cover, and the annular outer cover is fixedly connected with the motor. The plurality of hanging lugs form a rectangular force unloading area corresponding to the motor, the left-right width of the force unloading area is larger than the diameter of the motor, and the up-down height of the force unloading area is larger than the height of the motor. The beneficial effects of the utility model are that the motor vibration is reduced, and the purpose of reducing noise is achieved; the cambered surface design at the top opening and the bottom opening of the outer cover is beneficial to reducing air resistance, reducing noise and improving the rising tension of the aircraft.

Description

Technical Field

[0001] The utility model relates to the technical field related to outer covers, and in particular to an outer cover structure for a ducted fan. Background Art

[0002] Ducted fans are a common propulsion method that helps improve the propulsion efficiency of aircraft and reduce carbon emissions and energy loss.

[0003] Ducted fan propulsion systems rely on a lithium-ion or DC power supply to drive a high-power brushless motor, which in turn drives the fan at high speed. The fan draws in air and applies work to it, increasing the total pressure and velocity of the airflow. Once the air enters the stator, its linear velocity is reduced. The air is then discharged at high speed from the tail, generating thrust. Ducted fan propulsion systems offer high efficiency, a high thrust-to-weight ratio, and low cost. As a power system, they are widely used in drones and helicopters, significantly impacting aircraft performance.

[0004] Existing ducted fan covers are typically not designed to reduce noise, especially due to the excessive noise caused by motor vibration. Therefore, they cannot meet the requirements of larger takeoff weights and high-quality UAV designs. Furthermore, the structural design of existing covers is not conducive to improving the lift of the aircraft. Utility Model Content

[0005] The utility model aims to overcome the drawback of the high noise of the ducted fan in the prior art and provides an outer cover structure for the ducted fan which is beneficial to reducing the noise.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cover structure for a ducted fan includes a motor and a circular outer cover. The motor is located inside the outer cover and is detachably connected to the center of the outer cover. The outer cover is provided with a plurality of hanging ears, which are fixedly connected to the outer side wall of the outer cover. The plurality of hanging ears form a rectangular unloading area corresponding to the motor. The left and right widths of the unloading area are greater than the diameter of the motor, and the upper and lower heights of the unloading area are greater than the height of the motor.

[0008] The motor is located within the outer housing and is removably connected to the center of the outer housing. The outer housing is provided with a plurality of lugs fixedly connected to the outer wall of the outer housing. These lugs form a rectangular unloading zone corresponding to the motor. The left-right width of the unloading zone is greater than the diameter of the motor, and the top-bottom height of the unloading zone is greater than the height of the motor. The lugs on the outer housing facilitate the installation and fixation of the ducted fan to the corresponding crossbeam. The rectangular unloading zone formed by the lugs facilitates confining vibrations generated by the motor within the unloading zone and transmitting them outward through the lugs, unloading the force in both the left-right and top-bottom directions, thereby reducing motor vibration and achieving the purpose of reducing noise.

[0009] Preferably, the left and right sides of the outer cover are provided with hanging holes corresponding to the center of the motor. The line connecting the center of the unloading zone to the center of the motor and the line connecting the hanging holes to the center of the motor are perpendicular to each other. The hanging holes facilitate the installation and fixing of the ducted fan to the corresponding crossbeam, thereby facilitating the front-to-back force relief of motor vibration, further achieving the effect of reducing noise.

[0010] Preferably, the number of the mounting lugs is four. The number of mounting lugs is preferably four, which facilitates forming a rectangular unloading area on the one hand, and can ensure the supporting strength during installation of the ducted fan on the other hand, and is conducive to cost saving.

[0011] Preferably, the outer cover is formed integrally after being coated with carbon fiber composite material, which is beneficial for effectively controlling the structural weight while ensuring the structural strength, and is beneficial for improving the lifting force of the aircraft.

[0012] Preferably, the inner sidewall of the top opening of the housing forms an outwardly open curved surface 1, with the top of the curved surface 1 facing away from the motor and the bottom of the curved surface 1 facing closer to the motor. The radius of the curved surface 1 gradually decreases from the top to the bottom. The curved surface design of the top opening of the housing helps reduce air resistance and noise while also enhancing the lift of the aircraft.

[0013] Preferably, the outer wall of the bottom opening of the housing forms an inwardly contracting curved surface 2, with the top of the curved surface 2 being closer to the motor and the bottom of the curved surface 2 being further away from the motor. The radius of the curved surface 2 gradually increases from its top to its bottom. The curved surface design at the bottom opening of the housing helps reduce air resistance and noise while also enhancing the lift of the aircraft.

[0014] The beneficial effects of the utility model are as follows: it is helpful to reduce the vibration of the motor and achieve the purpose of reducing noise; the outer cover is formed in one piece after being covered with carbon fiber composite material, which is beneficial to effectively control the structural weight while ensuring the structural strength; the curved surface design at the top opening and the bottom opening of the outer cover is beneficial to reducing air resistance, reducing noise and facilitating the improvement of the lifting force of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is the main view of the utility model;

[0017] Figure 3 yes Figure 2 Cross-sectional view of AA in the figure.

[0018] In the figure: 1. Motor, 2. Housing, 3. Mounting ears, 4. Unloading area, 5. Mounting holes, 6. Arc surface 1, 7. Arc surface 2. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specified, the relative arrangement of components, numerical expressions, and values ​​described in these embodiments do not limit the scope of this application. For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" are used in the embodiments to illustrate the relationship of one element or feature shown in the figures relative to another. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to encompass different orientations of the device during use or operation. For example, if the device in the figure is inverted, an element described as being "below" another element or feature would be fixed "above" the other element or feature. Therefore, the exemplary term "below" can include both upper and lower orientations. The device can be fixed in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to scale. Technologies, processes, and equipment known to those skilled in the relevant art may not be discussed in detail, but, where appropriate, should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that like reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0023] like Figure 1 and Figure 2 The embodiment shown is a cover structure for a ducted fan, which includes a motor 1 and a circular outer cover 2. The motor 1 is located in the outer cover 2 and is detachably connected to the center of the outer cover 2. The outer cover 2 is provided with a plurality of hanging ears 3, which are fixedly connected to the outer side wall of the outer cover 2. The plurality of hanging ears 3 form a rectangular unloading area 4 corresponding to the motor 1. The left and right widths of the unloading area 4 are greater than the diameter of the motor 1, and the upper and lower heights of the unloading area 4 are greater than the height of the motor 1.

[0024] Hanging holes 5 corresponding to the center of the motor 1 are provided on both the left and right sides of the outer cover 2 , and the line connecting the center of the unloading area 4 to the center of the motor 1 and the line connecting the hanging holes 5 to the center of the motor 1 are perpendicular to each other.

[0025] There are four mounting ears 3.

[0026] The outer cover 2 is formed as a whole after being covered with carbon fiber composite material.

[0027] like Figure 3 As shown, the inner sidewall of the top opening of the outer cover 2 forms an outwardly open arcuate surface 1 6, with the top of the arcuate surface 1 6 being away from the motor 1 and the bottom of the arcuate surface 1 6 being closer to the motor 1. The radius of the arcuate surface 1 6 gradually decreases from its top to its bottom. The outer sidewall of the bottom opening of the outer cover 2 forms an inwardly contracting arcuate surface 2 7, with the top of the arcuate surface 2 7 being closer to the motor 1 and the bottom of the arcuate surface 2 7 being away from the motor 1. The radius of the arcuate surface 2 7 gradually increases from its top to its bottom.

[0028] In the present invention, the lugs 3 on the outer cover 2 facilitate the installation and fixation of the ducted fan to the corresponding crossbeam; the number of lugs 3 is generally preferably four, and the four lugs 3 form a rectangular unloading zone 4, which facilitates confining the vibration generated by the motor 1 within the unloading zone 4 and transmitting it outward through the lugs 3, respectively unloading the force in the left and right directions and the up and down directions, thereby facilitating the reduction of vibration of the motor 1 and achieving the purpose of reducing noise. The hanging holes 5 on the left and right sides of the outer cover 2 facilitate the installation and fixation of the ducted fan to the corresponding crossbeam, thereby facilitating the unloading of the vibration of the motor 1 in the front and back directions, further achieving the effect of reducing noise. To reduce the structural weight of the aerial module, the outer cover 2 is formed in one piece after being coated with carbon fiber composite material, effectively controlling the structural weight while ensuring structural strength. The design of the curved surface 1 6 at the top opening of the outer cover 2 and the design of the curved surface 2 7 at the bottom opening of the outer cover 2 help reduce air resistance, reduce noise, and facilitate increasing the lifting force of the aircraft.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cover structure for a ducted fan, characterized in that: The invention comprises a motor (1) and a circular outer cover (2), wherein the motor (1) is located in the outer cover (2) and is detachably connected to the center of the outer cover (2), and the outer cover (2) is provided with a plurality of hanging ears (3), wherein the hanging ears (3) are fixedly connected to the outer side wall of the outer cover (2), and the plurality of hanging ears (3) form a rectangular unloading area (4) corresponding to the motor (1), wherein the left and right widths of the unloading area (4) are greater than the diameter of the motor (1), and the upper and lower heights of the unloading area (4) are greater than the height of the motor (1).

2. The outer cover structure for a ducted fan according to claim 1, wherein: The left and right sides of the outer cover (2) are both provided with hanging holes (5) corresponding to the center of the motor (1), and the line connecting the center of the unloading area (4) to the center of the motor (1) and the line connecting the hanging holes (5) to the center of the motor (1) are perpendicular to each other.

3. The outer cover structure for a ducted fan according to claim 1, wherein: The number of the hanging ears (3) is four.

4. The outer cover structure for a ducted fan according to claim 1, wherein: The outer cover (2) is formed as a whole after being covered with a carbon fiber composite material.

5. The outer cover structure for a ducted fan according to claim 1, wherein: The inner side wall of the top opening of the outer cover (2) forms an outwardly open arc-shaped surface (6), the top end of the arc-shaped surface (6) is away from the motor (1), the bottom end of the arc-shaped surface (6) is close to the motor (1), and the radius of the arc-shaped surface (6) gradually decreases from its top end to its bottom end.

6. A cover structure for a ducted fan according to claim 1, 2, 3, 4 or 5, characterized in that: The outer wall of the bottom opening of the outer cover (2) forms an inwardly contracted arc surface 2 (7), the top end of the arc surface 2 (7) is close to the motor (1), the bottom end of the arc surface 2 (7) is away from the motor (1), and the radius of the arc surface 2 (7) gradually increases from its top end to its bottom end.

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