A folding propeller for a drone

Abstract

The application discloses a folding propeller of a UAV, which comprises a blade, a blade clamp assembly and a sheath assembly, the blade clamp assembly comprises a pin and a screw, the sheath assembly comprises a sheath shell, a first gasket and a second gasket, and is located at a root position of the blade; the blade and the sheath assembly are installed between the blade clamp assemblies; the pin and the screw are arranged on the upper and lower sides of the blade clamp assembly respectively; the blade, the sheath assembly and the blade clamp assembly are fixedly connected through the screw and the pin. The sheath assembly is installed at the root position of the blade, the blade and the sheath assembly are installed on the blade clamp together, the blade is installed inside the sheath assembly, gaskets are arranged on the two sides of the sheath assembly, and the sheath assembly is fixed between a blade clamp seat and a blade clamp cover through the pin, the screw and a gland. During work, the sheath assembly rotates with the blade, the sheath shell rotates relative to the gaskets, meanwhile, the high-elastic gaskets further absorb up-down and left-right vibrations of the propeller during work, thereby reducing wear of a propeller root of the propeller, and the service performance and the service life of the blade can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and specifically provides a folding propeller for UAVs. Background Technology

[0002] Existing folding propeller assemblies for drones and other aircraft typically feature propeller blades designed with a rotating connection to the propeller clamp. This allows the folding propeller assembly to be folded up when not in use, reducing its space requirements during transport. When needed, the propeller blades are manually unfolded, and centrifugal force is used to rotate them to full unfolding and maintain the unfolded state, enabling portable use. In existing designs, to prevent direct wear between the propeller blades and the clamp, a rigid shim is usually placed between them. The clearance between the propeller blades and clamp is adjusted by tightening the screws or replacing the rigid shims, thereby obtaining the required damping and ensuring consistency in the clearance between each pair of propeller blades and clamps. However, this design places high demands on the assembly and dimensional accuracy of the folding propellers. Insufficient dimensional accuracy, or excessively tight or loose screws, will result in inconsistent clearance between the propeller clamp and blades, unstable damping, and significant deviations in the consistency of the folding propellers. This affects the normal operation and stability of the aircraft. Therefore, it is necessary to repeatedly adjust the screw tightness or replace the rigid shims to restore the required damping for the blades and ensure consistent clearance between each pair of blades and the clamp. Furthermore, the durability of existing folding propeller designs is not high. Once the rigid shims wear down during use, gaps will appear in the vertical position of the fixed blades, causing the blades to vibrate and significantly impacting the consistency of the clearance between the blades and clamps. This affects the propeller's power output, as well as the normal operation and stability of the aircraft. It also necessitates frequent replacement of the rigid shims, reducing the lifespan of the folding propellers and increasing operating costs.

[0003] Therefore, how to design a new high-performance and long-lasting folding propeller for drones is a technical problem to be solved. Utility Model Content

[0004] Therefore, it is necessary to provide a folding propeller for drones that has stable performance and long lifespan to address the existing problems.

[0005] This application provides a folding propeller for a drone, including a blade, a propeller clamp assembly, and a protective sleeve assembly. The propeller clamp assembly includes a pin and a screw, and the protective sleeve assembly includes a protective shell, a first washer, and a second washer, located at the root of the blade. The blade and the protective sleeve assembly are installed between the propeller clamp assembly. The pin and the screw are respectively disposed on the upper and lower sides of the propeller clamp assembly. The screw and the pin achieve a fixed connection between the blade, the protective sleeve assembly, and the propeller clamp assembly.

[0006] Preferably, the propeller clamp assembly further includes: a propeller clamp seat, a first washer, a second washer, a propeller clamp cover, and a pressure cap; the first washer is located between the propeller clamp seat and the first gasket; the second washer is located between the propeller clamp cover and the second gasket.

[0007] Preferably, the pin passes through the propeller clamp seat, the first washer, the first gasket, and the protective shell; the screw passes through the pressure cap, the propeller clamp cover, the second gasket, the second washer, and the protective shell; the pin and the screw are fixedly connected in the through hole of the protective shell.

[0008] Preferably, both the first gasket and the second gasket have annular boss structures on their surfaces.

[0009] Preferably, the first gasket and the second gasket are made of a highly elastic material.

[0010] Compared with existing technologies, the technical solution disclosed in this utility model involves installing a protective sleeve assembly at the root of the propeller blade. This assembly includes a protective sleeve shell and high-elasticity gaskets. The propeller blade and the protective sleeve assembly are mounted together on the propeller clamp. During assembly, the propeller blade is installed inside the protective sleeve assembly. Gaskets are provided on both sides of the protective sleeve assembly, which is then fixed between the propeller clamp seat and the propeller clamp cover by pins, screws, and pressure caps. During operation, the protective sleeve assembly rotates with the propeller blade, converting the relative rotation between the propeller blade and the gaskets into relative rotation between the protective sleeve shell and the gaskets. Simultaneously, the high-elasticity gaskets further absorb the vertical and horizontal vibrations of the propeller during operation, thereby reducing wear at the propeller root. This application, when applied to the field of unmanned aerial vehicles (UAVs), can effectively improve the performance and lifespan of propeller blades at a lower cost. Attached Figure Description

[0011] The exemplary embodiments of this utility model can be more fully understood by referring to the following accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain the utility model and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0012] Figure 1 This is a schematic diagram showing the combined appearance and disassembly of a folding propeller for a drone according to an exemplary embodiment of this application;

[0013] Figure 2 This is a disassembly diagram of a blade and sheath assembly provided according to an exemplary embodiment of this application;

[0014] Figure 3 This is a cross-sectional view of a folding propeller for a drone provided according to an exemplary embodiment of this application.

[0015] Figure Labels

[0016] 1-Pin; 2-Propeller clamp seat; 31-First washer; 32-Second washer; 41-First gasket; 41-Second gasket; 5-Sheath; 6-Propeller blade; 7-Propeller clamp cover; 8-Pressure cap; 9-Screw; Detailed Implementation

[0017] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] Reference Figure 1 This application provides a folding propeller for a drone, including blades, a blade clamp assembly, and a sheath assembly. Specifically, this embodiment has two blades 6, so each component corresponds to the number of blades and is set in a multiple of 2 to match the number of blades 6.

[0022] Specifically, pin 1 is installed in the through holes on both sides of the propeller clamp seat 2, two pressure caps 8 are installed in the through holes on both sides of the propeller clamp cover 7, the propeller blade 1 and the sheath assembly are installed between the propeller clamp assembly, and the fixed connection between the propeller blade 6, the sheath assembly and the propeller clamp assembly is achieved by screws 9 and pin 1.

[0023] Specifically, the sheath assembly includes a first gasket 41, a sheath shell 5, and a second gasket 42, such as Figure 2 As shown, two high-elastic pads (i.e., the first pad 41 and the second pad 42) are respectively embedded into the upper and lower sides of the sheath shell 5 and positioned by notches to form a sheath assembly, and then the propeller 6 is inserted into the sheath assembly.

[0024] Specifically, the propeller clamp assembly includes a pin 1, a propeller clamp seat 2, a first washer 31, a second washer 32, a propeller clamp cover 7, a pressure cap 8, and a pin 9; wherein, the first washer 31 is located between the propeller clamp seat 2 and the first gasket 41; and the second washer 32 is located between the propeller clamp cover 7 and the second gasket 42.

[0025] Reference Figure 3 The pin 1 passes through the propeller clamp seat 2, the first washer 31, the first gasket 41 and the protective shell 5; the screw 9 passes through the pressure cap 8, the propeller clamp cover 7, the second gasket 42, the second washer 32 and the protective shell 5; the pin 1 and the screw 9 are fixedly connected in the through hole of the protective shell 5.

[0026] Specifically, the surfaces of the first gasket 41 and the second gasket 42 are provided with annular boss structures, which are located between the cover 5, the first gasket 41 (second gasket 42), and the pin 1. Specifically, the annular boss structure avoids direct contact between the cover 5 and the pin 1, thereby reducing wear. When the propeller is working, the sheath assembly rotates with the blades, converting the relative rotation between the blades and the gaskets into relative rotation between the sheath and the gaskets. Simultaneously, the gaskets, made of highly elastic material, further absorb the vertical and horizontal vibrations of the propeller during operation, thereby reducing wear at the propeller root.

[0027] Compared with existing technologies, the technical solution disclosed in this utility model involves installing a protective sleeve assembly at the root of the propeller blade. This assembly includes a protective sleeve shell and high-elasticity gaskets. The propeller blade and the protective sleeve assembly are mounted together on the propeller clamp. During assembly, the propeller blade is installed inside the protective sleeve assembly. Gaskets are provided on both sides of the protective sleeve assembly, which is then fixed between the propeller clamp seat and the propeller clamp cover by pins, screws, and pressure caps. During operation, the protective sleeve assembly rotates with the propeller blade, converting the relative rotation between the propeller blade and the gaskets into relative rotation between the protective sleeve shell and the gaskets. Simultaneously, the high-elasticity gaskets further absorb the vertical and horizontal vibrations of the propeller during operation, thereby reducing wear at the propeller root. This application, when applied to the field of unmanned aerial vehicles (UAVs), can effectively improve the performance and lifespan of propeller blades at a lower cost.

[0028] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0029] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means at least two.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A folding propeller for a drone, characterized in that, The device includes a blade, a blade clamp assembly, and a sheath assembly. The blade clamp assembly includes a pin and a screw, and the sheath assembly includes a sheath shell, a first washer, and a second washer, located at the root of the blade. The blade and the sheath assembly are installed between the blade clamp assembly. The pin and the screw are respectively located on the upper and lower sides of the blade clamp assembly. The blade, the sheath assembly, and the blade clamp assembly are fixedly connected by the screw and the pin.

2. The folding propeller for a drone according to claim 1, characterized in that, The propeller clamp assembly further includes: a propeller clamp seat, a first washer, a second washer, a propeller clamp cover, and a pressure cap; the first washer is located between the propeller clamp seat and the first gasket; the second washer is located between the propeller clamp cover and the second gasket.

3. The folding propeller for a drone according to claim 2, characterized in that, The pin passes through the propeller holder, the first washer, the first gasket, and the protective shell; the screw passes through the pressure cap, the propeller holder cover, the second gasket, the second washer, and the protective shell; the pin and the screw are fixedly connected in the through hole of the protective shell.

4. The folding propeller for a drone according to claim 1, characterized in that, Both the first gasket and the second gasket have annular boss structures on their surfaces.

5. The folding propeller for a drone according to claim 1, characterized in that, The first gasket and the second gasket are made of a highly elastic material.

Images