Foldable unmanned aerial vehicle propeller

Abstract

The utility model discloses a foldable unmanned aerial vehicle propeller, belongs to the technical field of unmanned aerial vehicle accessories, and is used for providing the foldable unmanned aerial vehicle propeller occupying less space, the foldable unmanned aerial vehicle propeller comprises a rotating disc, a plurality of centrifugal shafts are arranged on the upper surface of the rotating disc, the centrifugal shafts are arranged around the axis of the rotating disc at equal intervals, and each centrifugal shaft is sleeved with a rotatable paddle; and receding grooves are formed in the side edges of the paddles and suitable for being matched with centrifugal shafts which are not in running fit, the upper ends of the centrifugal shafts are fixedly connected with limiting plates through connecting pieces, and an end sleeve is arranged on the bottom face of the rotating disc and suitable for being matched with the output end of a propeller driver of the unmanned aerial vehicle. According to the propeller, the centrifugal shaft structures arranged at equal intervals are designed, the blades are arranged on the centrifugal shafts in a sleeving mode, and the receding groove structures capable of being matched with the centrifugal shafts are formed in the edges of the blades, so that the blades can be deflected and stacked together in the non-working state, and the size of the propeller in the non-working state is effectively reduced; therefore, the space occupied by storage is reduced.

Description

Technical Field

[0001] This application relates to the field of drone accessory technology, and more particularly to a foldable drone propeller. Background Technology

[0002] Most existing civilian drones use propellers to provide lift. Because propellers are relatively long, even if they are removed from the drone body, they will still take up a lot of storage space. Summary of the Invention

[0003] The purpose of this application is to provide a foldable drone propeller that occupies less space.

[0004] To achieve the above objectives, this application provides a foldable drone propeller: including a turntable, the upper surface of which has a plurality of centrifugal shafts, which are equidistantly arranged around the axis of the turntable, each of which is fitted with a rotatable blade, the side of which has a clearance groove adapted to fit with the non-rotating centrifugal shaft, the upper ends of which are fixedly connected to a limiting plate by a connector, and the bottom surface of the turntable has an end sleeve adapted to cooperate with the output end of the drone's propeller driver to obtain rotational driving force.

[0005] As a preferred embodiment, one end of the blade has a bushing, which is suitable for fitting around the centrifugal shaft and forming a rotating pair, so that the blade can be deflected and folded.

[0006] As a preferred embodiment, the height of the bushing along the axis is less than the height of the centrifugal shaft along the axis, so that the blades can overlap more easily.

[0007] As a preferred embodiment, the lower end of the end sleeve is provided with a pin hole, which is suitable for insertion into the output end of the UAV propeller driver, making the disassembly and assembly operations more convenient and quick.

[0008] As a preferred embodiment, each centrifugal shaft has an inner liner ring at its upper end, and the limiting plate has a through hole corresponding to the inner liner ring. Each inner liner ring is inserted into one of the through holes to ensure the stability of the relative position of the limiting plate and the turntable.

[0009] As a preferred embodiment, the connector is a bolt, and the inner wall of the inner liner ring has an internal threaded hole extending into the centrifugal shaft, which is suitable for threaded engagement with the connector to prevent the limiting plate from detaching from the centrifugal shaft.

[0010] As a preferred embodiment, the upper surface of the limiting plate has a shielding ring surrounding the through hole, and the upper end of the connector is located inside the shielding ring, which reduces the impact of airflow on the connector and can reduce the probability of the connector becoming loose to a certain extent.

[0011] As a preferred embodiment, the number of centrifugal shafts is three, and the number of blades corresponds to the number of centrifugal shafts. These blades are adapted to be centrally symmetrical about the axis of the turntable. When centrally symmetrical, the center of the entire propeller is located on the axis of the turntable.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By designing a centrifugal shaft structure with equal spacing, the blades are fitted onto the centrifugal shaft, and a clearance groove structure that can fit with the centrifugal shaft is opened on the edge of the blades, so that the blades can be deflected and stacked together when not in operation, which effectively reduces the size of the propeller when not in operation, thereby reducing the space required for storage.

[0014] (2) By making the axial dimension of the bushing smaller than the axial dimension of the centrifugal shaft, the blades can move up and down along the axis of the centrifugal shaft, so that the adjacent blades of the propeller fit tightly together without excessive deformation when the propeller is in the folded state. This not only does not affect the lift provided when the blades are fully unfolded, but also improves the stability of the propeller after folding, which is more conducive to packaging and transportation. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional schematic diagram of the overall structure of the foldable drone propeller.

[0016] Figure 2 This is a second three-dimensional schematic diagram of the overall structure of the foldable drone propeller.

[0017] Figure 3 This is a three-dimensional cross-sectional view of the limiting plate of the foldable drone propeller and its interaction with the turntable.

[0018] Figure 4 This is a three-dimensional cross-sectional view of the turntable of the foldable drone propeller.

[0019] Figure 5 A three-dimensional cross-sectional view of the limiting disk of the foldable drone propeller.

[0020] Figure 6 This is a three-dimensional structural diagram of the blades of the foldable drone propeller.

[0021] Figure 7 This is a three-dimensional cross-sectional view of the blades of the foldable drone propeller.

[0022] In the diagram: 1. Turntable; 101. End sleeve; 102. Pin hole; 103. Centrifugal shaft; 104. Inner liner ring; 105. Internal threaded hole; 2. Paddle blade; 201. Shaft sleeve; 202. Relief groove; 3. Limiting plate; 301. Through hole; 302. Covering ring; 4. Connecting piece. Detailed Implementation

[0023] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0025] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0026] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0027] like Figure 1-7The foldable drone propeller shown includes a turntable 1 that rotates only around its own axis. The upper surface of the turntable 1 has several centrifugal shafts 103, at least two in number. These centrifugal shafts 103 are equidistantly arranged around the axis of the turntable 1, ensuring the center of gravity of the turntable 1 lies on its own axis, thus guaranteeing stability during rotation. Each centrifugal shaft 103 is fitted with a rotatable blade 2. Specifically, the larger end of the blade 2 has a bushing 201. The diameter of the bushing 201 is approximately perpendicular to the plane containing the main body of the blade 2. The bushing 201 fits precisely around the centrifugal shaft 103, forming a rotating pair. The bushing 201 rotates along the axis... The height of the line is less than the height of the centrifugal shaft 103 along the axis, which means that the bushing 201 can slide up and down along the centrifugal shaft 103, so that the blades 2 can be misaligned when they overlap. Usually, there are three centrifugal shafts 103. Since the number of blades 2 corresponds to the number of centrifugal shafts 103, there are also three blades 2. When these blades 2 are fully unfolded or fully folded, they will be symmetrical about the axis of the turntable 1. The side of the blade 2 is also provided with a clearance groove 202, which fits perfectly with the centrifugal shaft 103 that is not rotated. The clearance groove 202 of the blade 2 that rotates with one centrifugal shaft 103 will fit with another adjacent centrifugal shaft 103.

[0028] The upper ends of these centrifugal shafts 103 are fixedly connected to the limiting plate 3 via connectors 4. Specifically, each centrifugal shaft 103 has a coaxial inner liner ring 104 at its upper end. The limiting plate 3 has through holes 301 that correspond to the number and position of the inner liner rings 104. Thus, each inner liner ring 104 is inserted into a corresponding through hole 301. The connector 4 is usually made of bolts. The inner wall of the inner liner ring 104 has corresponding internal threaded holes 105 extending into the centrifugal shaft 103 for threaded engagement with the connector 4. The upper surface of the limiting plate 3 has a shielding ring 302 surrounding the through hole 301. The larger upper end of the connector 4 is located inside the shielding ring 302, which can reduce the airflow effect on the connector 4.

[0029] The bottom surface of the turntable 1 has an end sleeve 101 for engaging with the output end of the drone's propeller driver. In fact, the lower end of the end sleeve 101 has an upwardly extending pin hole 102 that fits into the output end of the drone's propeller driver, so that the rotational power of the motor can be transmitted to the propeller. Since all the components of the propeller are made of plastic, they are relatively lightweight and have high contact friction with the metal output end of the motor, so an interference fit is sufficient to ensure the stability of the engagement.

[0030] Installation method: First, put the end sleeve 101 of the turntable 1 on the motor output end of the drone. Then, put the propeller 2 on the centrifugal shaft 103 one by one. Check whether the installation direction of the propeller 2 is correct. If it is correct, then fasten the limiting plate 3 on all the centrifugal shafts 103 and fix it with the connector 4. The installation of one propeller is completed. Continue to install other propellers in the above way. After all propellers are installed, you can start the motor to make the drone take off. The propeller 2 will rotate under the drive of the centrifugal shaft 103. Due to centrifugal force, the propeller 2 on the same propeller will be evenly spaced and generate lift by passing through the air. When the propeller stops and the drone needs to be folded up, just move all the propeller 2 toward the direction where the relief groove 202 is opened until the relief groove 202 is completely engaged with the adjacent centrifugal shaft 103. At this time, the propeller 2 is in a folded state. The radial dimension of the entire propeller is greatly reduced, reducing the space occupied for storage and improving the stability after storage.

[0031] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A foldable drone propeller, characterized in that: The device includes a turntable (1), the upper surface of which has a plurality of centrifugal shafts (103) arranged equidistantly around the axis of the turntable (1). Each centrifugal shaft (103) is fitted with a rotatable blade (2). The blade (2) has a clearance groove (202) on its side, which is suitable for engaging with the non-rotating centrifugal shaft (103). The upper ends of the centrifugal shafts (103) are fixedly connected to a limiting plate (3) by a connector (4). The bottom surface of the turntable (1) has an end sleeve (101), which is suitable for engaging with the output end of the propeller driver of the UAV.

2. The foldable drone propeller as described in claim 1, characterized in that: One end of the blade (2) has a bushing (201) which is adapted to be fitted over the centrifugal shaft (103) and to form a rotating pair.

3. The foldable drone propeller as described in claim 2, characterized in that: The height of the bushing (201) along the axis is less than the height of the centrifugal shaft (103) along the axis.

4. The foldable drone propeller as described in claim 3, characterized in that: The lower end of the end sleeve (101) is provided with a pin hole (102) suitable for insertion with the output end of the UAV propeller drive.

5. The foldable drone propeller as described in any one of claims 1 to 4, characterized in that: Each of the centrifugal shafts (103) has an inner liner ring (104) at its upper end. The limiting plate (3) has a through hole (301) corresponding to the inner liner ring (104). Each inner liner ring (104) is inserted into one of the through holes (301).

6. The foldable drone propeller as described in claim 5, characterized in that: The connector (4) is made of bolts, and the inner wall of the inner liner ring (104) has an internal threaded hole (105) extending into the centrifugal shaft (103) and is adapted to be threadedly engaged with the connector (4).

7. The foldable drone propeller as described in claim 6, characterized in that: The upper surface of the limiting plate (3) has a shielding ring (302) surrounding the through hole (301), and the upper end of the connector (4) is located inside the shielding ring (302).

8. The foldable drone propeller as described in any one of claims 1 to 4, characterized in that: There are three centrifugal shafts (103), and the number of blades (2) corresponds to the number of centrifugal shafts (103). These blades (2) are adapted to be symmetrical about the axis of the turntable (1).

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