Propeller protection structure and vertical take-off and landing unmanned aerial vehicle thereof

Abstract

The utility model belongs to the field of unmanned aerial vehicles, and particularly relates to a propeller protection structure and a vertical take-off and landing unmanned aerial vehicle thereof, and the propeller protection structure comprises a side face protection check ring and a blade type end face protection device arranged at at least one end of the side face protection check ring; the blade type end face protection device comprises an annular base plate with a through hole and a plurality of blades, the blades are rotationally arranged on the annular base plate in an annular array mode, and the hole diameter of the through hole can be adjusted when the blades rotate; a propeller containing space is defined by the plane where the blades are located and the side face protection check rings. According to the propeller protection structure, when the propeller needs to be used, the through holes can be completely opened by controlling the blades so that the propeller can work normally, when the propeller does not need to be used, the through holes can be blocked by controlling the blades, on one hand, physical protection is conducted on the propeller, and on the other hand, the propeller is protected; on the other hand, aerodynamic configuration of the aircraft can be guaranteed, and flight efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of unmanned aerial vehicles (UAVs), and in particular relates to a propeller protection structure and a vertical take-off and landing UAV thereof. Background Art

[0002] In recent years, composite-wing drones with vertical take-off and landing capabilities have become increasingly popular in the market due to their convenient take-off and landing, fast cruising speed, and long range.

[0003] These drones typically feature a large rotor on top of their composite wing bodies, enabling vertical takeoff and landing. However, these drones have several drawbacks: During flight, the large rotors are not in use and remain exposed. This creates air resistance, impacting flight efficiency, and is easily damaged by impacts (e.g., from branches and leaves), compromising reliability and flight efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a propeller protection structure that can adapt to the working state of the propeller and can ensure the reliability and flight efficiency of the UAV and the vertical take-off and landing UAV thereof.

[0005] The utility model provides a propeller protection structure, comprising a side protection retaining ring and a blade-type end face protection device arranged at at least one end of the side protection retaining ring;

[0006] The blade-type end face protection device includes an annular base plate with a through hole and a plurality of blades, wherein the plurality of blades are arranged in an annular array and rotated on the annular base plate. The rotation of the plurality of blades can adjust the aperture of the through hole;

[0007] The plane where the blades are located and the side protection rings enclose a propeller accommodating space.

[0008] Furthermore, the plurality of blades rotate synchronously.

[0009] Furthermore, the propeller protection structure also includes a blade driving device for actively driving the blades to rotate.

[0010] Furthermore, the blade-type end face protection device is provided at both ends of the side protection retaining ring.

[0011] Furthermore, the outer side surface of the side protection ring is an arc-shaped structure.

[0012] The utility model also provides a vertical take-off and landing UAV, comprising a UAV body;

[0013] Flying wings are provided on both sides of the drone body;

[0014] The drone body is provided with a first propeller and the above-mentioned propeller protection structure, the axis of the first propeller is parallel to the vertical axis of the drone body, the first propeller is arranged in the propeller accommodating space, and the side protection ring is fixedly connected to the drone body.

[0015] Furthermore, the first propeller is arranged on the top of the drone body, and the side protection ring is provided with a connecting plate for connecting with the drone body;

[0016] Alternatively, the drone body is provided with mounting holes that pass through both ends of the drone body, and the first propeller and the side protection retaining ring are arranged in the mounting holes.

[0017] Furthermore, the first propeller includes a connecting shaft and a rotating blade assembly arranged on top of the connecting shaft;

[0018] The plurality of blades of the blade-type end face protection device located at the lower end of the side protection retaining ring adjust the minimum aperture of the through hole to be equal to the outer diameter of the connecting shaft.

[0019] Furthermore, a second propeller is provided at the front end of the wing;

[0020] The axis of the second propeller is parallel to the longitudinal axis of the drone body.

[0021] Furthermore, a third propeller is provided on the tail wing of the drone body;

[0022] The axis of the third propeller is parallel to the horizontal axis of the drone body.

[0023] The beneficial effect of the present invention is that the propeller protection structure provided by the present invention can fully open the through-hole by controlling the blades when the propeller is in use to facilitate normal propeller operation. When the propeller is not in use, the through-hole can be blocked by controlling the blades. This not only closes the propeller housing space and provides physical protection for the propeller, but also maintains the aerodynamic shape of the aircraft and improves flight efficiency. In addition, the side protection ring can also form a duct for the propeller, forming a ducted propeller, which can improve the propeller tip vortex and enhance the propeller's aerodynamic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attachment Figure 1 This is a schematic diagram of the structure of the first propeller and the third propeller when they stop working in the present invention;

[0025] Attachment Figure 2 This is a schematic diagram of the first angle structure of the first propeller and the third propeller in the present invention when they are working;

[0026] Attachment Figure 3 This is a schematic diagram of the second angle structure of the first propeller and the third propeller in the present invention when they are working;

[0027] Attachment Figure 4 This is a schematic diagram of the structure of the blade-type end face protection device of the present invention when the blades completely block the through hole;

[0028] Attachment Figure 5 This is a schematic structural diagram of the blade-type end face protection device of the present invention when the blade opens the through hole to a certain extent;

[0029] Attachment Figure 6 This is a schematic structural diagram of the blade-type end face protection device of the present invention when the blades have their through holes fully opened.

[0030] In the figure, 1-propeller protection structure; 11-side protection ring; 12-blade-type end face protection device; 121-annular base plate; 1211-through hole; 122-blade; 13-propeller accommodating space; 2-UAV body; 21-mounting hole; 3-flying wing; 4-first propeller; 41-connecting shaft; 42-rotating blade assembly; 5-connecting plate; 6-second propeller; 7-third propeller. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection, electrical connection, physical connection, or wireless communication connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0036] As attached Figure 1 -Attached Figure 6 As shown, the utility model provides a propeller protection structure 1, comprising a side protection retaining ring 11 and a blade-type end face protection device 12 provided at at least one end of the side protection retaining ring 11, wherein the side protection retaining ring 11 is a cylindrical structure;

[0037] The blade-type end face protection device 12 includes an annular base plate 121 having a through hole 1211 and a plurality of blades 122. The plurality of blades 122 are arranged in an annular array on the annular base plate 121. When the plurality of blades 122 rotate, the blades 122 can be rotated and accommodated in the annular base plate 121, or can be rotated into the through hole 1211 of the annular base plate 121. When the blades 122 rotate into the through hole 1211 of the annular base plate 121, the blades 122 can block the through hole 1211. After all the blades 122 rotate, the through hole 1211 can be blocked in an annular or circular structure, thereby adjusting the aperture of the through hole 1211. At this time, the inner side of the plurality of blades 122 serves as the inner diameter of the through hole 1211, that is, the plurality of blades 122 can completely block the through hole 1211 (see attached Figure 4 ), the through hole 1211 can also be opened to a certain extent (see attached Figure 5 ), you can also fully open the through hole 1211 (see attached Figure 6 ), specifically, the structure of the blade-type end face protection device 12 is consistent with the blade-type aperture structure, and various types of blade-type aperture structures can be adopted, and only adaptive adjustment is required in size;

[0038] The platform on which the blades 122 are located and the side protective ring 11 enclose a propeller accommodating space 13. The propeller accommodating space 13 is used to accommodate the propeller. When the propeller needs to be used, the through hole 1211 can be fully opened by controlling the blades 122 to ensure normal operation of the propeller. When the propeller is not in use, the through hole 1211 can be blocked by controlling the blades 122. On the one hand, the propeller accommodating space 13 can be closed to provide physical protection for the propeller. On the other hand, the aerodynamic shape of the aircraft can be guaranteed to improve flight efficiency.

[0039] The propeller protection structure 1 provided by the present invention can fully open the through-hole 1211 by controlling the blades 122 when the propeller is in use, allowing the propeller to operate normally. When the propeller is not in use, the through-hole 1211 can be blocked by controlling the blades 122. This not only seals the propeller housing 13, providing physical protection for the propeller, but also maintains the aerodynamic shape of the aircraft and improves flight efficiency. Furthermore, the side protection ring 11 can also form a duct for the propeller, creating a ducted propeller that can improve propeller tip vortex flow and enhance the propeller's aerodynamic performance.

[0040] In one embodiment, the plurality of blades 122 rotate synchronously. Specifically, the synchronous rotation of the blades 122 can be achieved by controlling the synchronous rotation of a single blade 122, or by a synchronous rotation control structure such as a rotating control disk (consistent with the existing synchronous rotation control structure in the blade-type aperture structure), thereby ensuring the aperture adjustment effect of the through hole 1211.

[0041] In one embodiment, the propeller protection structure 1 also includes a blade drive device for actively driving the blade 122 to rotate. The blade drive device is connected to the drone body 2, so that the opening and closing of the through hole 1211 in the propeller protection structure 1 can be controlled during the flight of the drone. For example, when the drone is a vertical take-off and landing drone, and the propeller protection structure 1 is used to protect the first propeller 4 of vertical take-off and landing, during the take-off and landing stages of the drone, the blade drive device controls the opening of the through hole 1211 to enable normal use of the first propeller 4 and to enable take-off and landing of the drone. When the drone is in the flight cruise process, the first propeller 4 stops rotating, and the blade drive device controls the closing of the through hole 1211, which can physically protect the first propeller 4 and ensure the aerodynamic shape of the first propeller 4.

[0042] In one embodiment, the blade-type end face protection device 12 is provided at both ends of the side protection ring 11, that is, two blade-type end face protection devices 12 can protect both ends of the propeller, further improving the protection effect and the aerodynamic shape. Preferably, when the propeller protrudes from the drone body 2 through the rotating shaft and is provided on the outside of the drone body 2 (see Appendix Figure 1 -Attached Figure 3 ), the blade type end face protection device 12 is located on the side where the propeller is connected to the drone body 2, and its blade 122 will not completely block the through hole 1211, and will ensure that the through hole 1211 has a certain opening (refer to the attached Figure 5 ), which is used to accommodate the connecting shaft 41 between the propeller and the drone body 2. Preferably, the drone body 2 is provided with mounting holes extending through both ends. When the propeller is installed in the mounting hole, the propeller is connected to the inner wall of the side protection retaining ring 11 via a connecting structure. Both sets of blade-type end face protection devices 12 can fully open and completely block the through hole 1211.

[0043] In one embodiment, the outer side surface of the side protection ring 11 is an arc-shaped structure. This embodiment is suitable for external placement of the propeller protection structure 1, which can further improve the aerodynamic shape of the propeller protection structure 1.

[0044] The utility model also provides a vertical take-off and landing UAV, comprising a UAV body 2;

[0045] The drone body 2 is provided with wings 3 on both sides, which are used for the drone to perform horizontal flight and cruising;

[0046] The drone body 2 is provided with a first propeller 4 and the above-mentioned propeller protection structure 1. The axis of the first propeller 4 is parallel to the vertical axis of the drone body 2, that is, the first propeller 4 is used to provide the drone body 2 with lifting force for vertical take-off and vertical landing of the drone body 2. The first propeller 4 is arranged in the propeller accommodating space 13, that is, the propeller protection structure 1 can protect the first propeller 4. The side protection ring 11 is fixedly connected to the drone body 2 to realize the connection between the propeller protection structure 1 and the drone body 2.

[0047] In one embodiment, refer to the attached Figure 1 -Attached Figure 3 , the first propeller 4 is arranged on the top of the drone body 2, and the side protection retaining ring 11 is provided with a connecting plate 5 for connecting with the drone body 2. At this time, the first propeller 4 is arranged on the top of the drone body 2, which facilitates the installation of the first propeller 4 and the side protection retaining ring 11;

[0048] Alternatively, the drone body 2 is provided with mounting holes that pass through both ends of the drone body 2, and the first propeller 4 and the side protection ring 11 are arranged in the mounting holes (not shown in the figure). At this time, when the blades 122 of the two sets of blade-type end face protection devices 12 completely block the through holes 1211, the blades 122 can directly serve as the outer shape of the drone body 2 without affecting the aerodynamic shape of the drone body 2.

[0049] In the embodiment where the first propeller 4 is disposed on the top of the drone body 2 , the first propeller 4 includes a connecting shaft 41 and a rotating blade assembly 42 disposed on the top of the connecting shaft 41 ;

[0050] The multiple blades 122 of the blade-type end face protection device 12 located at the lower end of the side protection ring 11 adjust the minimum aperture of the through hole 1211 to be equal to the outer diameter of the connecting shaft 41, that is, the multiple blades 122 can be blocked to the outside of the connecting shaft 41 without causing interference to the connecting shaft 41.

[0051] In one embodiment, a second propeller 6 is provided at the front end of the wing 3;

[0052] The axis of the second propeller 6 is parallel to the longitudinal axis of the drone body 2. The second propeller 6 is used to provide power for horizontal flight and cruising of the drone. A propeller protection structure 1 can also be provided on the outside of the second propeller 6. However, considering the service life and number of the second propellers 6 and the cost of the drone, the propeller protection structure 1 can be omitted.

[0053] In one embodiment, a third propeller 7 is provided on the tail wing of the drone body 2;

[0054] The axis of the third propeller 7 is parallel to the transverse axis of the drone body 2. The third propeller 7 is used to balance the rotational torque generated by the first propeller 4 to ensure that the drone body 2 does not rotate around the vertical axis during take-off and landing. Preferably, a mounting hole 21 is provided on the tail wing, and the third propeller 7 is disposed in the mounting hole 21. Preferably, the third propeller 7 is equipped with a propeller protection structure 1. In this case, the side protection retaining ring 11 is fixedly disposed on the inner wall of the mounting hole 21, and the third propeller 7 is fixed to the inner wall of the side protection retaining ring 11 through a connecting structure. Preferably, blade-type end face protection devices 12 are provided at both ends of the side protection retaining ring 11. The blades 122 of the two blade-type end face protection devices 12 can completely block their corresponding through holes 1211. When the third propeller 7 is not in use, the two sets of blades 122 can serve as part of the tail wing to ensure the aerodynamic shape of the tail wing.

[0055] The above description is merely an embodiment and does not limit the present invention in any way. Any person skilled in the art can, without departing from the scope of the present invention, utilize the above-disclosed technical content to make many possible variations, modifications, or modifications to the present invention's technical solution into equivalent embodiments with equivalent variations. Therefore, any simple modifications, equivalent variations, and modifications to the above embodiments made in accordance with the technical essence of the present invention that do not depart from the content of the present invention's technical solution shall fall within the scope of protection of the present invention's technical solution.

Claims

1. A propeller protection structure, characterized in that: It comprises a side protection retaining ring (11) and a blade-type end face protection device (12) arranged at at least one end of the side protection retaining ring (11); The blade-type end face protection device (12) comprises an annular base plate (121) having a through hole (1211) and a plurality of blades (122), wherein the plurality of blades (122) are rotatably arranged in an annular array on the annular base plate (121), and the rotation of the plurality of blades (122) can adjust the aperture of the through hole (1211); The plane where the blades (122) are located and the side protection retaining ring (11) enclose a propeller accommodating space (13).

2. The propeller protection structure according to claim 1, wherein: The plurality of blades (122) rotate synchronously.

3. The propeller protection structure according to claim 2, wherein: It also includes a blade driving device for actively driving the blade (122) to rotate.

4. The propeller protection structure according to any one of claims 1 to 3, characterized in that: The blade-type end face protection device (12) is provided at both ends of the side protection retaining ring (11).

5. The propeller protection structure according to claim 4, characterized in that: The outer side surface of the side protection retaining ring (11) is an arc-shaped structure.

6. A vertical take-off and landing UAV, characterized by: Including drone body (2); Flying wings (3) are provided on both sides of the drone body (2); The drone body (2) is provided with a first propeller (4) and a propeller protection structure (1) according to any one of claims 1 to 5, wherein the axis of the first propeller (4) is parallel to the vertical axis of the drone body (2), the first propeller (4) is arranged in the propeller accommodating space (13), and the side protection ring (11) is fixedly connected to the drone body (2).

7. The vertical take-off and landing UAV according to claim 6, characterized in that: The first propeller (4) is arranged on the top of the drone body (2), and the side protection ring (11) is provided with a connecting plate (5) for connecting to the drone body (2); Alternatively, the drone body (2) is provided with mounting holes that pass through both ends of the drone body (2), and the first propeller (4) and the side protection retaining ring (11) are arranged in the mounting holes.

8. The vertical take-off and landing UAV according to claim 6, characterized in that: The first propeller (4) comprises a connecting shaft (41) and a rotating blade assembly (42) arranged on top of the connecting shaft (41); The plurality of blades (122) of the blade-type end face protection device (12) located at the lower end of the side protection retaining ring (11) adjust the minimum aperture of the through hole (1211) to be equal to the outer diameter of the connecting shaft (41).

9. The vertical take-off and landing UAV according to claim 6, characterized in that: A second propeller (6) is provided at the front end of the flying wing (3); The axis of the second propeller (6) is parallel to the longitudinal axis of the drone body (2).

10. The vertical take-off and landing UAV according to claim 6, characterized in that: A third propeller (7) is provided on the tail wing of the drone body (2); The axis of the third propeller (7) is parallel to the horizontal axis of the drone body (2).

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