Propeller fixing device and unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, and particularly discloses a propeller fixing device and an unmanned aerial vehicle, and the propeller fixing device comprises a first propeller clamp and a second propeller clamp. The first paddle clamp comprises a first rotating piece and a second rotating piece which are connected with each other. The rotating direction of the first rotating piece is the same as the inclination direction of the first paddle, and the rotating direction of the second rotating piece is the same as the inclination direction of the corresponding second paddle, so that when the plain propeller rotates, the first paddle and the second paddle can obtain larger lift force; therefore, the plain propeller can achieve the flight performance of a plateau propeller. According to the propeller fixing device, the flight performance of a plateau propeller can be achieved by changing the first propeller clamp and the second propeller clamp of a plain propeller, the production cost is saved, and the problems that in the prior art, two propellers used according to the requirements of different flight altitudes need to be subjected to independent mold opening, and the manufacturing cost is low are effectively solved. And the cost is high.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a propeller fixing device and an unmanned aerial vehicle. Background Art

[0002] At present, in order to meet the requirements of different flight altitudes, most of the existing unmanned aerial vehicles are generally equipped with two types of propellers. One is used for low-altitude flight in plains, generally covering an altitude range of 0 - 4000m; the other is used for high-altitude flight, covering an altitude range of 4000 - 7000m. Since two types of propellers are required, separate molds need to be opened, which will increase the production cost. Content of the Utility Model

[0003] The purpose of the utility model is to provide a propeller fixing device and an unmanned aerial vehicle, so as to solve the problem that in the prior art, two types of propellers used due to the requirements of different flight altitudes need to be separately molded, resulting in a relatively high cost.

[0004] On the one hand, the utility model provides a propeller fixing device, which includes: a first propeller clamp, including a first rotating part and a second rotating part connected to each other. There is a first rotation central axis in the extending direction of the first rotating part. The first rotating part has a first rotation angle of rotating around the first rotation central axis. There is a second rotation central axis in the extending direction of the second rotating part, which is on the same straight line as the first rotation central axis. The second rotating part has a second rotation angle of rotating around the second rotation central axis. The rotation angles of the first rotation angle and the second rotation angle are the same; a second propeller clamp, with both ends of the second propeller clamp connected to the first rotating part and the second rotating part respectively to fix a first propeller blade and a second propeller blade respectively. The second propeller clamp can be connected to a motor; wherein, the rotation direction of the first rotating part is the same as the inclination direction of the first propeller blade, and the rotation direction of the second rotating part is the same as the inclination direction of the corresponding second propeller blade.

[0005] As an optional technical solution of the propeller fixing device, the angles of both the first rotation angle and the second rotation angle are 3° - 10°.

[0006] As an optional technical solution of the propeller fixing device, both the first rotating part and the second rotating part have first weight-reducing holes.

[0007] As an alternative technical solution of the propeller fixing device, the propeller fixing device further includes a first fastener and a second fastener. The second propeller clip includes a bottom plate and a first connecting member and a second connecting member provided at both ends of the bottom plate. The first fastener sequentially passes through the first rotating member, the first propeller blade and the first connecting member to fix the first propeller blade between the first rotating member and the first connecting member. The second fastener sequentially passes through the second rotating member, the second propeller blade and the second connecting member to fix the second propeller blade between the second rotating member and the second connecting member. The bottom plate can be connected to the motor.

[0008] As an alternative technical solution of the propeller fixing device, the first connecting member has a first inclined surface which is parallel to the first rotating member, and the second connecting member has a second inclined surface which is parallel to the second rotating member.

[0009] As an alternative technical solution of the propeller fixing device, the second propeller clip further includes a first limiting plate and a second limiting plate. The first connecting member and the bottom plate are both connected to the first limiting plate, and the second connecting member and the bottom plate are both connected to the second limiting plate. The first limiting plate and the first propeller blade are in limiting cooperation in the rotation direction of the first propeller blade, and the second limiting plate and the second propeller blade are in limiting cooperation in the rotation direction of the second propeller blade.

[0010] As an alternative technical solution of the propeller fixing device, the bottom plate has a mounting hole, and the propeller fixing device includes a third fastener which passes through the mounting hole and is connected to the motor.

[0011] As an alternative technical solution of the propeller fixing device, both the first rotating member and the second rotating member have a first gasket groove, and both the first connecting member and the second connecting member have a second gasket groove.

[0012] As an alternative technical solution of the propeller fixing device, the second propeller clip has a second weight-reducing hole.

[0013] On the other hand, the present utility model provides a drone, which includes a first propeller blade, a second propeller blade, a motor and the propeller fixing device in any of the above solutions. The second propeller clip can be connected to the motor. The first connecting member in the first rotating member and the second propeller clip is connected to the first propeller blade through the first fastener in the propeller fixing device, and the second connecting member in the second rotating member and the second propeller clip is connected to the first propeller blade through the second fastener in the propeller fixing device.

[0014] The beneficial effects of the present utility model are:

[0015] The present utility model provides a propeller fixing device, which includes a first propeller clamp and a second propeller clamp. Among them, the first propeller clamp includes a first rotating member and a second rotating member connected to each other. By using the propeller fixing device of the present utility model, on the basis of a plain propeller, the first rotating member is provided with a first rotation angle rotating around a first rotation central axis, and the second rotating member is provided with a second rotation angle rotating around a second rotation central axis. With such a setting, a certain angle is added when the first propeller blade and the second propeller blade are installed, thereby increasing the pitch of the plain propeller. At the same time, the rotation direction of the first rotating member is the same as the inclination direction of the first propeller blade, and the rotation direction of the second rotating member is the same as the inclination direction of the corresponding second propeller blade. In this way, when the plain propeller rotates, the first propeller blade and the second propeller blade can obtain greater lift, and further enable the plain propeller to achieve the flight performance of a high-altitude propeller. By using the propeller fixing device of the present utility model, the flight performance of a high-altitude propeller can be achieved by changing the first propeller clamp and the second propeller clamp of the plain propeller, saving production costs and effectively solving the problem in the prior art that two types of propellers used due to requirements of different flight altitudes need to be separately molded, resulting in higher costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the propeller fixing device in an embodiment of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the first propeller clamp in an embodiment of the present utility model Figure 1 ;

[0018] Figure 3 is a side view of the first propeller clamp in an embodiment of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the second propeller clamp in an embodiment of the present utility model;

[0020] Figure 5 is a schematic structural diagram of the second propeller clamp at another angle in an embodiment of the present utility model;

[0021] Figure 6 is a schematic diagram of a partial structure of a drone in another embodiment of the present utility model;

[0022] Figure 7 is a comparison diagram of the hovering power of the drone and a conventional drone at different altitudes in an embodiment of the present utility model.

[0023] In the figure:

[0024] 1. First propeller clamp; 11. First rotating member; 111. First rotation angle; 12. Second rotating member; 121. Second rotation angle; 13. First weight reduction hole; 14. First gasket groove;

[0025] 2. Second paddle clip; 21. Base plate; 211. Mounting hole; 22. First connecting piece; 221. First inclined surface; 23. Second connecting piece; 231. Second inclined surface; 24. First limiting plate; 25. Second limiting plate; 26. Second weight reduction hole; 27. Second gasket groove;

[0026] 3. First fastener;

[0027] 4. Second fastener;

[0028] 5. First paddle blade;

[0029] 6. Second paddle blade. Detailed implementation mode

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0034] As Figures 1 to 5 shown, this embodiment provides a propeller fixing device, which includes a first propeller clip 1 and a second propeller clip 2. Among them, the first propeller clip 1 includes a first rotating member 11 and a second rotating member 12 connected to each other. The first rotating member 11 has a first rotation angle 111 that rotates around a first rotation center axis, and the second rotating member 12 has a second rotation angle 121 that rotates around a second rotation center axis. The rotation angles of the first rotation angle 111 and the second rotation angle 121 are the same. Both ends of the second propeller clip 2 are respectively connected to the first rotating member 11 and the second rotating member 12 to fix the first propeller blade 5 and the second propeller blade 6 respectively.

[0035] With the propeller fixing device of the present utility model, on the basis of a plain propeller, the first rotating member 11 is provided with a first rotation angle 111 that rotates around a first rotation center axis, and the second rotating member 12 is provided with a second rotation angle 121 that rotates around a second rotation center axis. Such a setting makes the first propeller blade 5 and the second propeller blade 6 increase a certain angle during installation, thereby increasing the pitch of the plain propeller; at the same time, the rotation direction of the first rotating member 11 is the same as the inclination direction of the first propeller blade 5, and the rotation direction of the second rotating member 12 is the same as the inclination direction of the corresponding second propeller blade 6. In this way, when the plain propeller rotates, the first propeller blade 5 and the second propeller blade 6 can obtain a greater lift force, and further enable the plain propeller to achieve the flight performance of a high-altitude propeller. By using the propeller fixing device of the present utility model, the flight performance of a high-altitude propeller can be achieved by changing the first propeller clip 1 and the second propeller clip 2 of the plain propeller, saving production costs and effectively solving the problem in the prior art that two types of propellers used due to requirements of different flight altitudes need to be separately molded, resulting in higher costs. It should be noted that a first rotation center axis is provided in the extending direction of the first rotating member 11, and a second rotation center axis located on the same straight line as the first rotation center axis is provided in the extending direction of the second rotating member 12. Among them, the extending direction of the first rotating member 11 is the length direction of the first rotating member 11, and the extending direction of the second rotating member 12 is the length direction of the second rotating member 12.

[0036] In this embodiment, the angles of the first rotation angle 111 and the second rotation angle 121 can both be set to 3° - 10°. With such a setting, the angles of the first rotation angle 111 and the second rotation angle 121 can be selected according to actual needs. Among them, the angles of the first rotation angle 111 and the second rotation angle 121 can be selected as 3°, 5°, 7°, 9°, 10°, etc.

[0037] Preferably, in this solution, the angles of the first rotation angle 111 and the second rotation angle 121 are both 5°. In this way, while ensuring a greater lift can be obtained, the efficiency of the propeller will not be greatly lost.

[0038] In some embodiments, such as Figure 1 and Figure 2 shown, both the first rotating member 11 and the second rotating member 12 have first weight-reducing holes 13. With such a setting, the overall weight of the first paddle clamp 1 can be reduced, thereby achieving a lightweight design.

[0039] Optionally, the shape of the first weight-reducing hole 13 includes but is not limited to a waist-shaped hole or a circular hole, etc.

[0040] Optionally, there are multiple first weight-reducing holes 13, and the multiple first weight-reducing holes 13 are spaced apart on the first rotating member 11 and the second rotating member 12.

[0041] Specifically, in order to be able to fix the first blade 5 between the first rotating member 11 and the first connecting member 22, and fix the second blade 6 between the second rotating member 12 and the second connecting member 23, in this solution, the propeller fixing device further includes a first fastener 3 and a second fastener 4. The second paddle clamp 2 includes a bottom plate 21 and the first connecting member 22 and the second connecting member 23 provided at both ends of the bottom plate 21. The first fastener 3 sequentially passes through the first rotating member 11, the first blade 5 and the first connecting member 22 to achieve the purpose of fixing the first blade 5 between the first rotating member 11 and the first connecting member 22. Similarly, the second fastener 4 sequentially passes through the second rotating member 12, the second blade 6 and the second connecting member 23 to achieve the purpose of fixing the second blade 6 between the second rotating member 12 and the second connecting member 23. The bottom plate 21 can be connected to the motor. Among them, both the first connecting member 22 and the second connecting member 23 are circular connecting blocks, and both the first fastener 3 and the second fastener 4 are bolts.

[0042] Optionally, both the first connecting member 22 and the second connecting member 23 have first connecting holes, both the first blade 5 and the second blade 6 have second connecting holes, and both the first rotating member 11 and the second rotating member 12 have third connecting holes. The first fastener 3 sequentially passes through the third connecting hole of the first rotating member 11, the second connecting hole of the first blade 5, and the first connecting hole of the first connecting member 22 to fix the first blade 5 between the first rotating member 11 and the first connecting member 22. Similarly, the second fastener 4 sequentially passes through the third connecting hole of the second rotating member 12, the second connecting hole of the second blade 6, and the first connecting hole of the second connecting member 23 to fix the second blade 6 between the second rotating member 12 and the second connecting member 23.

[0043] Furthermore, the first connecting member 22 has a first inclined surface 221, and the first inclined surface 221 is parallel to the first rotating member 11. Such a setting facilitates the installation of the first blade 5 and prevents the first blade 5 from interfering with the first connecting member 22 during rotation. Similarly, the second connecting member 23 has a second inclined surface 231, and the second inclined surface 231 is parallel to the second rotating member 12. Such a setting facilitates the installation of the second blade 6 and prevents the second blade 6 from interfering with the second connecting member 23 during rotation.

[0044] In this embodiment, the second blade clamp 2 further includes a first limiting plate 24 and a second limiting plate 25. The first connecting member 22 and the bottom plate 21 are both connected to the first limiting plate 24, and the second connecting member 23 and the bottom plate 21 are both connected to the second limiting plate 25. Since the first limiting plate 24 and the first blade 5 are in limiting cooperation in the rotation direction of the first blade 5, and the second limiting plate 25 and the second blade 6 are in limiting cooperation in the rotation direction of the second blade 6. In this way, when the first blade 5 and the second blade 6 are retracted, they will not interfere with each other.

[0045] Specifically, the bottom plate 21 has a mounting hole 211, and the propeller fixing device includes a third fastener. By passing the third fastener through the mounting hole 211 and connecting it to the motor, the purpose of connecting the second blade clamp 2 to the motor is achieved.

[0046] Optionally, there are multiple mounting holes 211, and the multiple mounting holes 211 are spaced apart on the bottom plate 21.

[0047] In some embodiments, both the first rotating member 11 and the second rotating member 12 have a first gasket groove 14, and both the first connecting member 22 and the second connecting member 23 have a second gasket groove 27. In this way, when installing the first blade 5, gaskets can be provided on both sides of the first blade 5 and are respectively located in the first gasket groove 14 of the first rotating member 11 and the second gasket groove 27 of the first connecting member 22. In this way, when the first blade 5 rotates, the friction between the first blade 5 and the first rotating member 11 and the first connecting member 22 can be reduced; similarly, when installing the second blade 6, gaskets can be provided on both sides of the second blade 6 and are respectively located in the first gasket groove 14 of the second rotating member 12 and the second gasket groove 27 of the second connecting member 23. In this way, when the second blade 6 rotates, the friction between the second blade 6 and the second rotating member 12 and the second connecting member 23 can be reduced.

[0048] Specifically, the second blade clamp 2 has a second weight reduction hole 26. Such a setting can reduce the weight of the second blade clamp 2, thereby achieving a lightweight design.

[0049] Optionally, the shape of the second weight reduction hole 26 includes, but is not limited to, a kidney-shaped hole or a circular hole, etc.

[0050] Optionally, there are multiple second weight reduction holes 26, and the multiple second weight reduction holes 26 are arranged at intervals on the second blade clamp 2.

[0051] Such as Figure 6As shown in the figure, this embodiment also provides a drone, which includes a first propeller blade 5, a second propeller blade 6, a motor, and the propeller fixing device in the above solution. Among them, the second propeller clamp 2 can be connected to the motor. The first connecting member 22 in the first rotating member 11 and the second propeller clamp 2 is connected to the first propeller blade 5 through the first fastener 3 in the propeller fixing device. The second connecting member 23 in the second rotating member 12 and the second propeller clamp 2 is connected to the first propeller blade 5 through the second fastener 4 in the propeller fixing device. For the drone of the present utility model, on the basis of the plain propeller, the first rotating member 11 is provided with a first rotation angle 111 that rotates around the first rotation center axis, and the second rotating member 12 is provided with a second rotation angle 121 that rotates around the second rotation center axis. With such a setting, a certain angle is added when the first propeller blade 5 and the second propeller blade 6 are installed, thereby increasing the pitch of the plain propeller. At the same time, the rotation direction of the first rotating member 11 is the same as the inclination direction of the first propeller blade 5, and the rotation direction of the second rotating member 12 is the same as the inclination direction of the corresponding second propeller blade 6. In this way, when the plain propeller rotates, the first propeller blade 5 and the second propeller blade 6 can obtain greater lift, and further the plain propeller can achieve the flight performance of the high-altitude propeller. By using the drone of the present utility model, the flight performance of the high-altitude propeller can be achieved by changing the first propeller clamp 1 and the second propeller clamp 2 of the plain propeller, saving production costs, and effectively solving the problem in the prior art that two types of propellers used due to requirements of different flight altitudes need to be separately molded, resulting in higher costs.

[0052] As Figure 7 As can be seen from the figure, the abscissa is the altitude and the ordinate is the hovering power. The actual simulation data is as follows. Select the hovering condition and compare the data at different altitudes. The drone designed by the present utility model has about 1%-2% less efficiency loss at high altitudes than the conventional drone. The impact is very small. Therefore, the drone designed by the present utility model can achieve high-altitude flight.

[0053] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A propeller fixing device, characterized in that: include: A first paddle clamp (1), comprising a first rotating member (11) and a second rotating member (12) connected to each other, wherein the first rotating member (11) has a first rotating center axis in an extending direction thereof, the first rotating member (11) has a first rotating angle (111) rotating around the first rotating center axis, and the second rotating member (12) has a second rotating center axis located in the same straight line as the first rotating center axis in an extending direction thereof, the second rotating member (12) has a second rotating angle (121) rotating around the second rotating center axis, and the first rotating angle (111) and the second rotating angle (121) are the same. a second paddle clamp (2), wherein two ends of the second paddle clamp (2) are respectively connected to the first rotating member (11) and the second rotating member (12) to respectively fix the first paddle blade (5) and the second paddle blade (6), and the second paddle clamp (2) can be connected to a motor; The rotation direction of the first rotating member (11) is the same as the tilt direction of the first blade (5), and the rotation direction of the second rotating member (12) is the same as the tilt direction of the corresponding second blade (6).

2. The propeller fixing device according to claim 1, characterized in that: The first rotation angle (111) and the second rotation angle (121) are both between 3° and 10°.

3. The propeller fixing device according to claim 1, characterized in that: The first rotating member (11) and the second rotating member (12) both have a first weight-reducing hole (13).

4. The propeller fixing device according to claim 1, characterized in that: The propeller fixing device further comprises a first fastener (3) and a second fastener (4); the second propeller clamp (2) comprises a base plate (21) and a first connecting member (22) and a second connecting member (23) arranged at two ends of the base plate (21); the first fastener (3) sequentially passes through the first rotating member (11), the first propeller blade (5) and the first connecting member (22) to fix the first propeller blade (5) between the first rotating member (11) and the first connecting member (22); the second fastener (4) sequentially passes through the second rotating member (12), the second propeller blade (6) and the second connecting member (23) to fix the second propeller blade (6) between the second rotating member (12) and the second connecting member (23); and the base plate (21) can be connected to the motor.

5. The propeller fixing device according to claim 4, characterized in that: The first connecting member (22) has a first inclined surface (221), the first inclined surface (221) is parallel to the first rotating member (11), and the second connecting member (23) has a second inclined surface (231), the second inclined surface (231) is parallel to the second rotating member (12).

6. The propeller fixing device according to claim 4, characterized in that: The second paddle clamp (2) further comprises a first limit plate (24) and a second limit plate (25); the first connecting member (22) and the bottom plate (21) are both connected to the first limit plate (24); the second connecting member (23) and the bottom plate (21) are both connected to the second limit plate (25); the first limit plate (24) and the first paddle (5) are matched for upper limit positioning in the rotation direction of the first paddle (5); the second limit plate (25) and the second paddle (6) are matched for upper limit positioning in the rotation direction of the second paddle (6).

7. The propeller fixing device according to claim 4, characterized in that: The bottom plate (21) has a mounting hole (211), and the propeller fixing device comprises a third fastener, which passes through the mounting hole (211) and is connected to the motor.

8. The propeller fixing device according to claim 4, characterized in that: The first rotating member (11) and the second rotating member (12) both have a first gasket groove (14), and the first connecting member (22) and the second connecting member (23) both have a second gasket groove (27).

9. The propeller fixing device according to claim 1, characterized in that: The second paddle clamp (2) has a second weight-reducing hole (26).

10. A drone, characterized in that: The propeller fixing device comprises a first propeller blade (5), a second propeller blade (6), a motor and the propeller fixing device according to any one of claims 1 to 9, wherein the second propeller clamp (2) can be connected to the motor, the first rotating member (11) and the first connecting member (22) in the second propeller clamp (2) are connected to the first propeller blade (5) via a first fastener (3) in the propeller fixing device, and the second rotating member (12) and the second connecting member (23) in the second propeller clamp (2) are connected to the first propeller blade (5) via a second fastener (4) in the propeller fixing device.

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