Unmanned aerial vehicle propeller assembly structure

Abstract

The invention is suitable for the technical field of unmanned aerial vehicles, and provides an unmanned aerial vehicle propeller assembly structure which comprises a fixing frame. The side face of the fixing frame is connected with a machine arm, and a motor is installed in the bottom end of the fixing frame. According to the unmanned aerial vehicle propeller assembling structure, the first springs are arranged to be matched with the clamping blocks to clamp and fix the connecting blocks on the side faces of the blades, the assembling mode is simple and convenient, the blades are not prone to falling off, meanwhile, each blade can be independently disassembled, assembled and replaced, the overall maintenance cost of the propeller in the later period can be reduced, and the practicability is high. The fixing ring and the upper cover are arranged, the fixing ring and the upper cover are located outside blades, so that the blades are protected, the situation that the unmanned aerial vehicle is out of control and falls due to collision of the blades is avoided, the height of a propeller of the unmanned aerial vehicle can be flexibly adjusted according to a use site by arranging an electric air cylinder, and the upper cover can be limited by arranging a positioning block; and the thread of the upper cover is prevented from loosening and falling off.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned aerial vehicles, and in particular relates to an unmanned aerial vehicle propeller assembly structure. Background Art

[0002] A drone is a type of aerial vehicle that is unmanned and can be controlled or controlled autonomously. It is recyclable and reusable. A drone is an unmanned aircraft controlled by a radio remote control device and a self-contained program control device. Drones are widely used in power inspection, agriculture, environmental protection, film and television shooting and other fields. Drone propellers are one of the main propulsion devices of drones. Drone propellers need to be replaced after long-term use to avoid breakage during subsequent flights.

[0003] Currently, the propellers of drones are usually fastened to the outside of the drive shaft by screws. This installation method is very cumbersome and brings a lot of trouble to the subsequent disassembly, assembly and replacement. In addition, the screws are prone to loosening after long-term use, causing the propellers to shake or even detach, which in turn causes the drone to fall accidentally. In addition, the propeller blades of drones are generally multiple integral structures. Therefore, when one of the blades is damaged, the entire structure needs to be replaced, thereby increasing the maintenance cost of the drone. Summary of the invention

[0004] The present invention provides a propeller assembly structure for a UAV, aiming to solve the problems of complicated disassembly and assembly steps of UAV propellers and high repair and replacement costs of integrated propellers.

[0005] The present invention is implemented as follows: a propeller assembly structure for a drone comprises a fixing frame; an organic arm is connected to the side of the fixing frame, a motor is installed inside the bottom end of the fixing frame, a driving shaft is connected to the top of the output shaft of the motor, a transmission shaft is connected to the outside of the driving shaft, a mounting frame is connected to the top of the transmission shaft, a groove is provided inside the mounting frame, and two groups of gaskets are slidably installed in the groove, a first spring is connected between the two groups of gaskets, two groups of slide grooves are provided on the top of the mounting frame, push blocks are connected to the tops of the two groups of gaskets, and a card block is installed on the ends of the two groups of gaskets away from each other. The outside of the mounting frame is symmetrically provided with grooves, and a connecting block is inserted in the groove, a blade is installed on the outside of the connecting block, and a card slot matched with the card block is opened on the inside of the connecting block, and the card block and the connecting block are slidably inserted, and a groove is opened on the upper surface of the arm, and an electric cylinder is installed in the groove, a connecting plate is connected to the top of the output shaft of the electric cylinder, a connecting sleeve is connected to the side of the connecting plate, the connecting sleeve is connected to the transmission shaft through a bearing, a connecting frame is installed on the outside of the connecting sleeve, a fixing ring is installed on the outside of the connecting frame, and an upper cover is installed on the top of the fixing ring.

[0006] Preferably, the upper surface of the block is configured as an inclined surface.

[0007] Preferably, the upper cover and the fixing ring are threadedly connected, a fixing frame is installed on the outer side of the fixing ring, a groove is provided inside the fixing frame, and a pull rod is slidably installed in the groove, a positioning block is installed on the top of the pull rod, a second spring is sleeved on the outside of the pull rod, and a positioning slot matching the positioning block is provided on the side of the upper cover.

[0008] Preferably, a slot matching the diameter of the drive shaft is opened at the bottom of the transmission shaft, two groups of limit blocks are symmetrically installed on the outer side of the top of the drive shaft, and a limit sliding groove matching the limit block is opened on the inner wall of the slot of the transmission shaft, and the drive shaft and the transmission shaft are slidably connected.

[0009] Preferably, a spherical groove is formed on the outer side wall of the limiting block, and a ball is movably embedded in the groove, and the outer wall of the ball is in conflict with the inner wall of the limiting sliding groove of the transmission shaft.

[0010] Preferably, a waterproof cover is installed on the top of the mounting frame, a rubber ball is installed on the lower side of the waterproof cover, and an embedded groove adapted to the rubber ball is opened on the top of the mounting frame.

[0011] Preferably, the waterproof cover is made of soft plastic material, and the waterproof cover is interference-connected with the mounting frame through a rubber ball.

[0012] Preferably, the fixing frame is slidably connected to the transmission shaft, an annular groove is provided on the inner side of the top of the fixing frame, and a sealing ring is embedded in the groove, and the inner side of the sealing ring is tightly fitted with the outer wall of the transmission shaft.

[0013] Compared with the prior art, the embodiments of the present application have the following beneficial effects: The device clamps and fixes the connecting block on the side of the blade by setting a first spring and a clamping block. This assembly method is simple, convenient and not easy to fall off. At the same time, each blade can be disassembled and replaced individually, which can reduce the overall maintenance cost of the propeller in the later stage. By setting a fixing ring and an upper cover, the fixing ring and the upper cover are located on the outside of the blade, so as to protect the blade and avoid the uncontrolled fall of the drone caused by the blade collision. By setting an electric cylinder, the propeller of the drone can be flexibly adjusted in height according to the site of use. By setting a positioning block, the upper cover can be limited to avoid the upper cover thread from loosening and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3is an enlarged schematic diagram of the mounting frame structure of the present invention; Figure 4 The present invention Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 5 It is a schematic diagram of the top cover structure of the present invention; Figure 6 It is a schematic diagram of a top view cross-sectional structure of a transmission shaft of the present invention; In the figure: 1. fixed frame; 2. machine arm; 3. motor; 4. drive shaft; 5. transmission shaft; 6. mounting frame; 7. gasket; 8. first spring; 9. push block; 10. clamping block; 11. connecting block; 12. blade; 13. connecting frame; 14. fixing ring; 15. upper cover; 16. waterproof cover; 17. rubber ball; 18. fixing frame; 19. pull rod; 20. positioning block; 21. second spring; 22. electric cylinder; 23. connecting plate; 24. limit block; 25. ball; 26. connecting sleeve; 27. sealing ring. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] The embodiment of the present invention provides a propeller assembly structure for a drone, such as Figure 1-6As shown, it includes a fixed frame 1, the side of the fixed frame 1 is connected to an organic arm 2, a motor 3 is installed inside the bottom end of the fixed frame 1, the top of the output shaft of the motor 3 is connected to a drive shaft 4, the outside of the drive shaft 4 is connected to a transmission shaft 5, the top of the transmission shaft 5 is connected to a mounting frame 6, a groove is provided inside the mounting frame 6, and two groups of gaskets 7 are slidably installed in the groove, a first spring 8 is connected between the two groups of gaskets 7, two groups of slide grooves are provided on the top of the mounting frame 6, push blocks 9 are connected to the tops of the two groups of gaskets 7, and a clamping block 10 is installed at the ends of the two groups of gaskets 7 away from each other. The outside of the mounting frame 6 is symmetrically provided with grooves, and a connecting block 11 is inserted in the groove, a blade 12 is installed on the outside of the connecting block 11, a card slot adapted to the card block 10 is provided on the inside of the connecting block 11, and the card block 10 and the connecting block 11 are slidably plugged in, a groove is provided on the upper surface of the arm 2, and an electric cylinder 22 is installed in the groove, a connecting plate 23 is connected to the top of the output shaft of the electric cylinder 22, a connecting sleeve 26 is connected to the side of the connecting plate 23, the connecting sleeve 26 is connected to the transmission shaft 5 through a bearing, and a connecting frame is installed on the outside of the connecting sleeve 26 13, a fixing ring 14 is installed on the outside of the connecting frame 13, and an upper cover 15 is installed on the top of the fixing ring 14. The device is driven by the motor 3 inside the fixing frame 1, and the motor 3 drives the transmission shaft 5 to rotate through the driving shaft 4, and the transmission shaft 5 drives the mounting frame 6 to rotate, and the mounting frame 6 drives the blades 12 to rotate, so as to realize the flight of the UAV. The blades 12 are installed on the side of the mounting frame 6 through the connecting block 11. When the blades 12 are installed, the connecting block 11 can be aligned with the groove on the side of the mounting frame 6 and pushed in. At this time, the card block 10 is clamped into the connecting block under the elastic force of the first spring 8. The side of the connecting block 11 is used to assemble and fix the blade 12. The device is configured to clamp and fix the connecting block 11 on the side of the blade 12 by arranging a first spring 8 and a clamping block 10. This assembly method is simple, convenient and not easy to fall off. At the same time, each blade 12 can be disassembled and replaced individually, which can reduce the overall maintenance cost of the propeller in the later stage. A fixing ring 14 and an upper cover 15 are provided, and the fixing ring 14 and the upper cover 15 are located on the outside of the blade 12. In this way, the blade 12 is protected to prevent the blade 12 from colliding and causing the drone to lose control and fall.

[0018] The upper surface of the clamping block 10 is arranged as an inclined surface, and this arrangement enables the connecting block 11 to squeeze the clamping block 10 into the groove of the mounting frame 6 when being pushed in, thereby further simplifying the installation steps and improving the convenience of assembly.

[0019] The upper cover 15 and the fixing ring 14 are threadedly connected, a fixing frame 18 is installed on the outer side of the fixing ring 14, a groove is provided inside the fixing frame 18, and a pull rod 19 is slidably installed in the groove, a positioning block 20 is installed on the top of the pull rod 19, and a second spring 21 is sleeved on the outside of the pull rod 19. A positioning slot matched with the positioning block 20 is provided on the side of the upper cover 15. The upper cover 15 and the fixing ring 14 are threadedly connected. By providing the positioning block 20, when the upper cover 15 is rotated and installed, the positioning block 20 is inserted into the positioning slot on the edge of the upper cover 15 under the elastic force of the second spring 21. Through this setting, the upper cover 15 can be limited to prevent the thread of the upper cover 15 from loosening and falling off.

[0020] A slot matching the diameter of the drive shaft 4 is provided at the bottom of the transmission shaft 5, and two groups of limit blocks 24 are symmetrically installed on the outer side of the top of the drive shaft 4. A limit slide groove matching the limit block 24 is provided on the inner wall of the slot of the transmission shaft 5. The drive shaft 4 and the transmission shaft 5 are slidably plugged in. By setting the limit block 24, the drive shaft 4 drives the transmission shaft 5 to rotate through the limit block 24, and the limit block 24 can slide on the inner side of the transmission shaft 5. Through this setting, a sliding connection between the two is achieved and they can rotate synchronously. The connecting sleeve 26 is rotatably connected to the transmission shaft 5 through a bearing, and the electric cylinder 22 can be started. The electric cylinder 22 drives the connecting sleeve 26 to move up and down through the connecting plate 23. Through this setting, the height of the propeller can be adjusted, so that the propeller of the drone can be flexibly adjusted in height according to the site of use.

[0021] A spherical groove is formed on the outer wall of the limit block 24, and a ball 25 is movably embedded in the groove. The outer wall of the ball 25 conflicts with the inner wall of the limit groove of the transmission shaft 5. By providing the ball 25, the ball 25 can convert the sliding friction between the limit block 24 and the transmission shaft 5 into a rolling friction. This setting can reduce the wear between the two, thereby increasing the service life of the parts.

[0022] A waterproof cover 16 is installed on the top of the mounting frame 6, and a rubber ball 17 is installed on the lower side of the waterproof cover 16. An embedded groove adapted to the rubber ball 17 is opened on the top of the mounting frame 6. By setting the waterproof cover 16, the waterproof cover 16 can cover the top of the mounting frame 6 to prevent rainwater from entering the interior of the mounting frame 6 through the slide groove and causing rust on parts.

[0023] The waterproof cover 16 is made of soft plastic material, and the waterproof cover 16 is interference-connected with the mounting frame 6 through the rubber ball 17. The waterproof cover 16 made of soft plastic material has higher corrosion resistance and is more convenient to open and close.

[0024] The fixed frame 1 is slidably connected to the transmission shaft 5. An annular groove is provided on the inner side of the top of the fixed frame 1, and a sealing ring 27 is embedded in the groove. The inner side of the sealing ring 27 fits tightly with the outer wall of the transmission shaft 5. By providing the sealing ring 27, the sealing ring 27 can prevent rainwater from flowing into the gap between the fixed frame 1 and the transmission shaft 5, thereby improving the waterproofness of the structure.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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. A propeller assembly structure for a drone, characterized in that: The invention comprises a fixed frame (1): the side of the fixed frame (1) is connected to an organic arm (2); a motor (3) is installed inside the bottom of the fixed frame (1); the top of the output shaft of the motor (3) is connected to a drive shaft (4); the outside of the drive shaft (4) is connected to a transmission shaft (5); the top of the transmission shaft (5) is connected to a mounting frame (6); a groove is provided inside the mounting frame (6); two groups of gaskets (7) are slidably installed in the groove; a first spring (8) is connected between the two groups of gaskets (7); two groups of sliding grooves are provided on the top of the mounting frame (6); push blocks (9) are connected to the tops of the two groups of gaskets (7); a clamping block (10) is installed at the ends of the two groups of gaskets (7) away from each other; the outside of the mounting frame (6) is symmetrically provided with grooves, and the grooves are symmetrically provided with grooves. A connecting block (11) is inserted in the middle, a blade (12) is installed on the outer side of the connecting block (11), a slot matching the card block (10) is provided on the inner side of the connecting block (11), the card block (10) and the connecting block (11) are slidably inserted, a groove is provided on the upper surface of the machine arm (2), and an electric cylinder (22) is installed in the groove, a connecting plate (23) is connected to the top of the output shaft of the electric cylinder (22), a connecting sleeve (26) is connected to the side of the connecting plate (23), the connecting sleeve (26) and the transmission shaft (5) are connected via a bearing, a connecting frame (13) is installed on the outer side of the connecting frame (13), a fixing ring (14) is installed on the outer side of the connecting frame (13), and an upper cover (15) is installed on the top of the fixing ring (14).

2. The UAV propeller assembly structure according to claim 1, characterized in that: The upper surface of the clamping block (10) is arranged as an inclined surface.

3. The UAV propeller assembly structure according to claim 1, characterized in that: The upper cover (15) and the fixing ring (14) are threadedly connected. A fixing frame (18) is installed on the outer side of the fixing ring (14). A groove is provided inside the fixing frame (18), and a pull rod (19) is slidably installed in the groove. A positioning block (20) is installed on the top of the pull rod (19). A second spring (21) is sleeved on the outside of the pull rod (19). A positioning slot that matches the positioning block (20) is provided on the side of the upper cover (15).

4. The UAV propeller assembly structure according to claim 1, characterized in that: The bottom of the transmission shaft (5) is provided with a slot matching the diameter of the drive shaft (4); two groups of limit blocks (24) are symmetrically mounted on the outer side of the top of the drive shaft (4); the inner wall of the slot of the transmission shaft (5) is provided with a limit sliding groove matching the limit blocks (24); the drive shaft (4) and the transmission shaft (5) are slidably plugged together.

5. The UAV propeller assembly structure according to claim 4, characterized in that: The outer wall of the limit block (24) is provided with a spherical groove, and a ball (25) is movably embedded in the groove, and the outer wall of the ball (25) abuts against the inner wall of the limit sliding groove of the transmission shaft (5).

6. The UAV propeller assembly structure according to claim 1, characterized in that: A waterproof cover (16) is installed on the top of the mounting frame (6), a rubber ball (17) is installed on the lower side of the waterproof cover (16), and an embedded groove matching the rubber ball (17) is provided on the top of the mounting frame (6).

7. The UAV propeller assembly structure according to claim 6, characterized in that: The waterproof cover (16) is made of soft plastic material, and the waterproof cover (16) is interference-connected to the mounting frame (6) via a rubber ball (17).

8. The UAV propeller assembly structure according to claim 1, characterized in that: The fixing frame (1) is slidably connected to the transmission shaft (5); an annular groove is provided on the inner side of the top of the fixing frame (1), and a sealing ring (27) is embedded in the groove; the inner side of the sealing ring (27) is tightly fitted to the outer wall of the transmission shaft (5).

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