Automatic folding mechanism for propeller of unmanned aerial vehicle

Abstract

The invention is suitable for the technical field of unmanned aerial vehicles, and provides an automatic folding mechanism for a propeller of an unmanned aerial vehicle. First limiting blocks are installed at the opposite angles of the bottom of the machine body, and first sliding plates are slidably connected to the outer portions of the two first limiting blocks in a sleeving mode. According to the automatic folding mechanism for the propeller of the unmanned aerial vehicle, the motor is arranged to drive the first gear and the second gear to rotate synchronously, the two sets of first sliding plates and second sliding plates stretch out and draw back synchronously, and therefore the propeller frame is released or retracted, and the overall occupied area of the unmanned aerial vehicle can be reduced through the folding mode; when the unmanned aerial vehicle is not used, the blades fall under the action of gravity and are attached to the side face of the mounting frame, so that the propeller blades are folded, and when the mounting frame is retracted to the side face of the vehicle body, the two sets of blades can be retracted into the containing grooves in the side face of the vehicle body, so that the blades can be protected; blade breakage caused when the unmanned aerial vehicle is carried is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned aerial vehicles, and in particular relates to an automatic folding mechanism for propellers of unmanned aerial vehicles. Background Art

[0002] A drone is an aircraft that is controlled and operated by a radio remote control device in conjunction with a corresponding program. Since there is no need to consider issues such as manned space, the structure is quite different from that of an ordinary aircraft, especially some small drones. Many of them use a multi-propeller drive structure. Each propeller and the corresponding drive motor equipment are installed and supported by an external extended extension arm. The purpose of stable flight drive is achieved through the cooperation of multiple small propellers. With the development of drones, the propellers of some drones can now be folded to avoid propeller breakage when the drone is carried.

[0003] At present, drone propellers are generally folded to fit on the surface of the arms. This folding method can prevent the blades from breaking when being carried. Although this folding method can protect the propellers, due to the long arms of the drone, the four arms occupy a large space, so a large storage mechanism is still required when carrying, thus failing to achieve the purpose of convenience. Summary of the invention

[0004] The invention provides an automatic folding mechanism for propellers of a drone, aiming to solve the problem that the existing drone still requires a large storage space after being folded, resulting in inconvenience in carrying.

[0005] The present invention is achieved in this way. A propeller automatic folding mechanism for a drone comprises a body; a first limit block is installed diagonally at the bottom of the body, and the first slide plate is slidably sleeved on the outside of two groups of the first limit blocks; a second limit block is installed diagonally at the bottom of the body, and the second slide plate is slidably sleeved on the outside of two groups of the second limit blocks; the first slide plate and the second slide plate are distributed in upper and lower layers, and a mounting frame is installed at one end of the first slide plate and the second slide plate away from the body; a fixing frame is installed on the top of the mounting frame, and blades are installed on the side of the fixing frame; a cabin is opened inside the body, and a motor is installed in the cabin; a transmission shaft is connected to the shaft end of the output shaft of the motor, and a first gear and a second gear are installed on the side and bottom of the transmission shaft respectively; teeth meshing with the first gear are opened on the side where the two groups of the first slide plates are close to each other, and teeth meshing with the second gear are opened on the side where the two groups of the second slide plates are close to each other, and placement grooves are opened on the four sides of the body.

[0006] Preferably, the blades are provided in two groups, and the two groups of blades are symmetrically and rotatably mounted on the side of the fixing frame through limiting pins.

[0007] Preferably, a groove is provided inside the fixing frame, and two groups of sliders are slidably installed in the groove, the two groups of sliders are connected by springs, and blocks are installed on the sides of the two groups of sliders away from each other, the limit pins pass through the blades and are plugged into the two sides of the fixing frame, slots are provided on the sides of the limit pins, and the two groups of block blocks are respectively plugged into the sides of the two groups of limit pins, a notch is provided on one side of the fixing frame, the slider is connected to a push block through the notch, and the push block is located outside the fixing frame and fits on its outer surface.

[0008] Preferably, two groups of magnetic blocks are symmetrically installed on the top of the mounting frame, and two groups of magnetic strips are symmetrically installed on the bottom of the fixing frame.

[0009] Preferably, the bottom of the body is provided with supporting feet, and the supporting feet are distributed around the edges of the bottom of the body.

[0010] Preferably, a cover plate is installed at the cabin opening of the machine body, the transmission shaft is installed at the center of the cover plate through a bearing, a rectangular convex block is installed at the inner end of the transmission shaft, and a rectangular groove matching the convex block on the surface of the transmission shaft is opened on the surface of the output shaft of the motor; Preferably, a wire cabin is provided inside the first slide plate and the second slide plate, and the wire sleeve in the wire cabin is made of a soft plastic corrugated hose.

[0011] Preferably, positioning strips are installed on both the left and right sides of the first limiting block and the second limiting block, and positioning sliding grooves matching with them are respectively provided on the inner sides of the sliding grooves of the first sliding plate and the second sliding plate.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects: The device is provided with a motor to drive the upper and lower first gears and the second gears to rotate synchronously, and the two sets of first slide plates and the second slide plates are synchronously extended and retracted, so as to release or retract the propeller frame. This folding method can reduce the overall footprint of the drone, making the drone easier to carry and use. When the drone is not in use, the blades fall down under the action of gravity and fit on the side of the mounting frame, so as to realize the folding of the propeller blades. When the mounting frame is retracted to the side of the body, the two sets of blades can be stored in the placement grooves on the side of the body, so as to protect the blades and prevent the blades from breaking when the drone is carried; The blades are rotatably mounted on both sides of the fixing frame by limit pins, and the limit pins are fixed by the spring and the card block. This fixing method is simple and convenient and not easy to fall off, and improves the convenience of disassembly and replacement of the blades. By providing magnetic blocks, when the blades stop rotating, the two groups of magnetic blocks generate suction on the magnetic strips at the bottom of the fixing frame, so that the blades after stopping are always kept on the left and right sides of the mounting frame, thereby ensuring that the blades can be stably retracted into the placement slot of the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional cross-sectional structural schematic diagram of the present invention; Figure 2 It is a bottom-up structural schematic diagram of the present invention; Figure 3 It is a front cross-sectional structural schematic diagram of the present invention; Figure 4 It is a side cross-sectional structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of a cross-sectional structure viewed from above of the present invention; Figure 6 It is a schematic diagram of the structure of two sides viewed from above of the present invention; Figure 7 is a top cross-sectional schematic diagram of the blade mounting structure of the present invention; In the figure: 1. body; 2. first limit block; 3. first slide plate; 4. second limit block; 5. second slide plate; 6. mounting frame; 7. fixing frame; 8. blade; 9. motor; 10. transmission shaft; 11. first gear; 12. second gear; 13. placement slot; 14. limit pin; 15. magnet; 16. support foot; 17. slider; 18. spring; 19. block; 20. push block; 21. cover plate. DETAILED DESCRIPTION

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0015] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0016] The embodiment of the present invention provides a propeller automatic folding mechanism for a drone, such as Figure 1-4As shown, it includes a body 1, a first limiting block 2 is installed diagonally at the bottom of the body 1, and the outsides of the two groups of first limiting blocks 2 are slidably sleeved with a first slide plate 3, a second limiting block 4 is installed diagonally at the bottom of the body 1, and the outsides of the two groups of second limiting blocks 4 are slidably sleeved with a second slide plate 5, the first slide plate 3 and the second slide plate 5 are distributed in upper and lower layers, and the first slide plate 3 and the second slide plate 5 are installed at the end away from the body 1. A mounting frame 6 is installed on the top of the mounting frame 6, and a blade 8 is installed on the side of the fixing frame 7. A cabin is opened inside the body 1, and a motor 9 is installed in the cabin. A transmission shaft 10 is connected to the shaft end of the output shaft of the motor 9, and a first gear 11 and a second gear 12 are installed on the side and bottom of the transmission shaft 10 respectively. The two groups of first slide plates 3 are opened on the side close to each other with teeth meshing with the first gear 11, and the two groups of second slide plates 5 are opened on the side close to each other. The sides are provided with teeth meshing with the second gear 12, and the four sides of the body 1 are provided with placement grooves 13. When the folding mechanism is used, the motor 9 in the body 1 can be started, and the motor 9 drives the first gear 11 and the second gear 12 to rotate synchronously in the same direction through the transmission shaft 10. When the first gear 11 rotates, the two groups of first slide plates 3 slide synchronously and in the opposite direction. When the second gear 12 rotates, the two groups of second slide plates 5 slide synchronously and in the opposite direction. When the two groups of first slide plates 3 and the second slide plates 5 slide, the four groups of mounting frames 6 can be close to the body 1 at the same time, so as to realize the overall retraction of the propeller bracket. The device drives the upper and lower first gears 11 and the second gear 12 to rotate synchronously by setting the motor 9, and the two groups of first slide plates 3 and the second slide plates 5 are synchronously extended and retracted, so as to release or retract the propeller bracket. This folding method can reduce the overall footprint of the drone, making the drone easier to carry and use.

[0017] There are two groups of blades 8, and the two groups of blades 8 are symmetrically and rotatably mounted on the side of the fixing frame 7 through the limit pins 14. By rotating the blades 8, when the drone is in use, the blades 8 rotate at high speed and are in a horizontal state under the action of centrifugal force. When the drone is not in use, the blades 8 fall down under the action of gravity and fit on the side of the mounting frame 6, thereby realizing the folding of the propeller blades 8. When the mounting frame 6 is retracted to the side of the body 1, the two groups of blades 8 can be stored in the placement groove 13 on the side of the body 1, so as to protect the blades 8 and avoid the blades 8 from breaking when the drone is carried.

[0018] A groove is provided inside the fixing frame 7, and two groups of sliders 17 are slidably installed in the groove. The two groups of sliders 17 are connected by springs 18. Blocks 19 are installed on the sides of the two groups of sliders 17 that are away from each other. The limit pin 14 passes through the blade 8 and is plugged into the two sides of the fixing frame 7. A slot is provided on the side of the limit pin 14. The two groups of block 19 are respectively plugged into the sides of the two groups of limit pins 14. A notch is provided on one side of the fixing frame 7. The slider 17 is connected with a push block 20 through the notch. The push block 20 is located outside the fixing frame 7 and fits on its outer surface. By setting the limit pin 14, the limit pin 14 rotatably installs the blade 8 on both sides of the fixing frame 7, and the limit pin 14 is fixed by the spring 18 and the block 19. This fixing method is simple, convenient and not easy to fall off, and improves the convenience of disassembly, assembly and replacement of the blade 8.

[0019] Two groups of magnetic blocks 15 are symmetrically installed on the top of the mounting frame 6, and two groups of magnetic strips are symmetrically installed on the bottom of the fixing frame 7. By providing the magnetic blocks 15, when the blade 8 stops rotating, the two groups of magnetic blocks 15 generate suction force on the magnetic strips at the bottom of the fixing frame 7, so that the blade 8 after stopping is always maintained on the left and right sides of the mounting frame 6, thereby ensuring that the blade 8 can be stably retracted into the placement slot 13 of the body 1.

[0020] The bottom of the body 1 is provided with supporting feet 16, which are distributed around the bottom edge of the body 1. By providing the supporting feet 16, the supporting feet 16 can elevate the entire drone, ensuring that the folding mechanism can be used effectively and stably.

[0021] A cover plate 21 is installed at the cabin opening of the body 1, and the transmission shaft 10 is installed at the center of the cover plate 21 through a bearing. A rectangular protrusion is installed at the inner end of the transmission shaft 10, and a rectangular groove matching the protrusion on the surface of the transmission shaft 10 is opened on the output shaft surface of the motor 9. By providing the cover plate 21, the cover plate 21 limits the installation of the transmission shaft 10, and the cover plate 21 can be removed synchronously with the transmission shaft 10, the first gear 11 and the second gear 12, thereby improving the convenience of subsequent maintenance of the UAV.

[0022] A wire cabin is provided inside the first slide plate 3 and the second slide plate 5, and the wire sleeve in the wire cabin adopts a soft plastic corrugated hose. This setting is used to realize the electrical connection between the propeller drive mechanism and the drone, and the retractable tube sleeve will not be tangled when it is retracted and folded.

[0023] Positioning strips are installed on the left and right sides of the first limiting block 2 and the second limiting block 4, and positioning sliding grooves matching with them are respectively provided on the inner sides of the sliding grooves of the first sliding plate 3 and the second sliding plate 5.

[0024] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0025] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0026] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. An automatic folding mechanism for propellers of a drone, characterized in that: The machine comprises a body (1), wherein a first limit block (2) is installed diagonally at the bottom of the body (1), and a first slide plate (3) is slidably sleeved on the outside of two groups of the first limit blocks (2), a second limit block (4) is installed diagonally at the bottom of the body (1), and a second slide plate (5) is slidably sleeved on the outside of the two groups of the second limit blocks (4), the first slide plate (3) and the second slide plate (5) are distributed in upper and lower layers, and a mounting frame (6) is installed at one end of the first slide plate (3) and the second slide plate (5) away from the body (1), and a fixing frame (7) is installed on the top of the fixing frame (7), and the fixing frame (7) ) is provided with a blade (8) on the side thereof, a cabin is provided inside the machine body (1), and a motor (9) is provided in the cabin, a transmission shaft (10) is connected to the output shaft end of the motor (9), a first gear (11) and a second gear (12) are respectively provided on the side and bottom of the transmission shaft (10), teeth meshing with the first gear (11) are provided on the sides of the two sets of the first slide plates (3) close to each other, teeth meshing with the second gear (12) are provided on the sides of the two sets of the second slide plates (5) close to each other, and placement grooves (13) are provided on the four sides of the machine body (1).

2. The automatic folding mechanism for propellers of a drone as claimed in claim 1, characterized in that: The blades (8) are provided in two groups, and the two groups of blades (8) are symmetrically and rotatably mounted on the side of the fixing frame (7) via a limiting pin (14).

3. The automatic folding mechanism for propellers of a drone as claimed in claim 2, characterized in that: The fixing frame (7) is provided with a groove inside, and two groups of sliders (17) are slidably installed in the groove, the two groups of sliders (17) are connected by a spring (18), and a clamping block (19) is installed on the side of the two groups of sliders (17) away from each other, the limit pin (14) passes through the blade (8) and is plugged into the two sides of the fixing frame (7), the side of the limit pin (14) is provided with a slot, and the two groups of clamping blocks (19) are respectively plugged into the side of the two groups of limit pins (14), and a notch is provided on one side of the fixing frame (7), and the slider (17) is connected to a push block (20) through the notch, and the push block (20) is located outside the fixing frame (7) and fits the outer surface thereof.

4. The automatic folding mechanism for propellers of a drone as claimed in claim 1, characterized in that: Two groups of magnetic blocks (15) are symmetrically mounted on the top of the mounting frame (6), and two groups of magnetic strips are symmetrically mounted on the bottom of the fixing frame (7).

5. The automatic folding mechanism for propellers of a drone as claimed in claim 1, characterized in that: Support feet (16) are installed at the bottom of the machine body (1), and the support feet (16) are distributed around the edges of the bottom of the machine body (1).

6. The automatic folding mechanism for propellers of a drone as claimed in claim 1, characterized in that: A cover plate (21) is installed at the cabin opening of the machine body (1), the transmission shaft (10) is installed at the center of the cover plate (21) via a bearing, a rectangular convex block is installed at the inner end of the transmission shaft (10), and a rectangular groove matching the convex block on the surface of the transmission shaft (10) is provided on the surface of the output shaft of the motor (9).

7. The automatic folding mechanism for propellers of a drone as claimed in claim 1, characterized in that: A wire compartment is provided inside the first slide plate (3) and the second slide plate (5), and the wire sleeve in the wire compartment is made of a soft plastic corrugated hose.

8. The automatic folding mechanism for propellers of a drone as claimed in claim 1, characterized in that: Positioning strips are installed on the left and right sides of the first limiting block (2) and the second limiting block (4), and positioning sliding grooves matching the first sliding plate (3) and the second sliding plate (5) are respectively provided on the inner sides of the sliding grooves.

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