Unmanned helicopter blade

Abstract

The invention provides an unmanned helicopter blade which comprises an unmanned aerial vehicle body 1, a fixing unit 2, a blade clamp 3 and a blade body 4, the fixing unit 2 is arranged on the surface of the unmanned aerial vehicle body 1, the blade clamp 3 is fixed to the surface of the fixing unit 2, and the blade body 4 is fixed to the surface of the blade clamp 3; at least two groups of the paddle clamps 3 and the paddle bodies 4 are uniformly distributed on the surface of the fixing assembly in a ring shape; the paddle clamp 3 and the paddle body 4 are matched with each other, so that the paddle body 4 is quickly mounted and dismounted from the surface of the paddle clamp 3, the paddle body 4 and the paddle clamp 3 are fixed without using bolts, and auxiliary tools are not needed for dismounting the paddle body 4 and the paddle clamp 3, so that the paddle clamp 3 and the paddle body 4 are mounted; and meanwhile, a fixing assembly is matched, the whole propeller hub 201 can be conveniently mounted and dismounted, and therefore the dismounting efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to a blade of an unmanned helicopter. Background Art

[0002] With the development of UAV technology, it is widely used in aerial photography, remote aerial monitoring, surveillance, reconnaissance, plant protection, firefighting and other fields. According to the different aerodynamic layout of UAVs, UAVs can be divided into unmanned fixed-wing, unmanned helicopter, unmanned multi-rotor, etc.

[0003] Unmanned fixed-wing flight has the highest efficiency, the longest flight endurance, and the highest cruising speed, but it requires a runway, cannot hover at a fixed point, and has the worst maneuverability; unmanned multi-rotor aircraft has the simplest structure, simple operation, strong fault tolerance, low cost, vertical take-off and landing, and can hover at a fixed point, but currently has a relatively short flight time and payload; unmanned helicopters take off and land vertically, hover at a fixed point, have the best maneuverability, and have a longer flight time and payload, but are more expensive.

[0004] In the fields of plant protection and firefighting, there are high requirements for the flight time and load of drones, so unmanned helicopters are mainly used. For example, in agriculture, drones can carry medicine boxes to spray pesticides in areas infected with pests and diseases. Not only is the speed much higher than manual spraying, the amount of medicine and water used is also much less than manual spraying, and it can efficiently adapt to various working environments, which can reduce the harm to people, such as heat stroke.

[0005] The blades of an unmanned helicopter are easily damaged by collision with the ground or obstacles during use. The existing assembly and disassembly processes of the blades and the drive motor require the use of tools, which is time-consuming and labor-intensive, greatly affecting work efficiency and increasing additional wear on related spare parts. To this end, we provide an unmanned helicopter blade to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide an unmanned helicopter blade that solves the problem that the assembly process and disassembly process of the blade and the drive motor both require the use of tools, which is time-consuming and labor-intensive and greatly affects work efficiency.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] An unmanned helicopter blade comprises an unmanned helicopter body 1, a fixing unit 2, a blade clamp 3 and a blade body 4, wherein:

[0009] The fixing unit 2 is arranged on the surface of the drone body 1, the propeller clamp 3 is fixed on the surface of the fixing unit 2, and the blade body 4 is fixed on the surface of the propeller clamp 3; there are at least two groups of propeller clamps 3 and blade bodies 4, which are evenly arranged in a ring shape on the surface of the fixing component; through the mutual cooperation between the propeller clamp 3 and the blade body 4, the blade body 4 can be quickly installed and removed from the surface of the propeller clamp 3;

[0010] The drone body 1 includes a mounting seat 101 and a fixing groove 102 and a first limiting groove 103 formed on the surface of the mounting seat 101;

[0011] The fixed unit 2 includes a hub 201 and a movable chamber 202 provided inside the hub 201. The movable chamber 202 is provided with a rotating shaft 203, a threaded tube 204, a pushing block 206 and a limiting rod 207.

[0012] The paddle clamp 3 includes a connecting block 301 and a telescopic slot 302 formed on the surface of the connecting block 301 . A telescopic rod 303 and a clamping block 304 are arranged inside the telescopic slot 302 . A rotation slot 307 and a second limiting slot 306 are also formed on the surface of the telescopic slot 302 .

[0013] Specifically, the limiting rod 207 is disposed on the surface of the movable bin 202 , and one end of the limiting rod 207 can be snapped into the first limiting groove 103 .

[0014] Specifically, the hub 201 matches the fixed groove 102, the hub 201 is clamped inside the fixed groove 102, the rotating shaft 203 is passed through the surface of the movable warehouse 202 through a bearing, the surface of the rotating shaft 203 is provided with a thread, the threaded tube 204 is movably connected to the rotating shaft 203 through a thread, a knob 205 is fixed to the other end of the rotating shaft 203, a groove 2011 is provided on the surface of the hub 201, the knob 205 is arranged inside the groove 2011, and the push block 206 is fixed to one end of the threaded tube 204.

[0015] Specifically, a first spring 208 is sleeved on the surface of the limiting rod 207 , a stopper is fixed on the surface of the limiting rod 207 , the limiting rod 207 corresponds to the pushing block 206 , there are two telescopic rods 303 and two first springs 208 , and they are symmetrically arranged on both sides of the pushing block 206 .

[0016] Specifically, a second connecting groove is opened on the surface of the hub 201, the connecting block 301 is fixed on the inner wall of the second connecting groove, the telescopic rod 303 is fixed on the inner wall of the telescopic groove 302, the clamping block 304 is fixed on one end of the telescopic rod 303 through a bearing, and a second spring 305 is sleeved on the surface of the telescopic rod 303.

[0017] Specifically, a first connecting groove 308 is further formed on the surface of the telescopic groove 302 . The first connecting groove 308 is connected to the rotating groove 307 , and the second limiting groove 306 is connected to the rotating groove 307 .

[0018] Specifically, a fixing block 402 is fixed on the surface of the blade body 4 , and the fixing block 402 matches the first connecting groove 308 , the rotating groove 307 and the second limiting groove 306 . A clamping groove 401 is also provided on the surface of the blade body 4 , and the clamping groove 401 corresponds to the clamping block 304 .

[0019] Specifically, first place the unmanned helicopter blade in a suitable position, then align the fixed block 402 on the surface of the blade body 4 with the first connecting groove 308 on the surface of the blade clamp 3, and then push the blade body 4 so that the fixed block 402 can move in the first connecting groove 308, and at the same time, the clamping block 304 can be clamped in the clamping groove 401 on the surface of the blade body 4. When the fixed block 402 moves to the rotating groove 307, the blade body 4 can be rotated, and at the same time, the fixed block 402 fixed on the side of the blade body 4 and the clamping block 304 fixed at one end of the telescopic rod 303 through the bearing can be driven to rotate synchronously. When the blade body 4 rotates to a specified angle, under the action of the rebound force of the second spring 305, the fixed block 402 is pushed to the second limiting groove 306 to complete the fixation of the blade body 4.

[0020] Then, place the hub 201 with the blade body 4 fixed in the fixing groove 102, and then turn the knob 205 to drive the rotating shaft 203 to rotate. With the cooperation of the slider 2041 and the sliding groove, the rotating shaft 203 can drive the threaded tube 204 to move, thereby driving the pushing block 206 fixed at one end of the threaded tube 204 to move synchronously, and then the pushing block 206 pushes the limiting rod 207 to move to both sides. When one end of the limiting rod 207 is clamped in the first limiting groove 103, stop turning the knob 205 to complete the fixation of the hub 201.

[0021] Compared with the prior art, the unmanned helicopter blade has the following beneficial effects:

[0022] 1. The present invention can quickly install and remove the blade body from the surface of the blade clamp through the mutual cooperation between the blade clamp and the blade body, and can complete the fixation between the blade body and the blade clamp without using bolts. Similarly, the separation between the blade body and the blade clamp does not require auxiliary tools, thereby facilitating the installation between the blade clamp and the blade body. At the same time, in conjunction with the fixing assembly, it is also convenient to install and remove the entire hub, thereby improving the disassembly efficiency of the device.

[0023] 2. The present invention combines the telescopic slot, the second spring, the clamping block, the second limiting slot and the first connecting slot, so that when installing the blade, it is only necessary to push the fixed block on the surface of the blade to align with the first connecting slot, and make the clamping block clamped in the clamping slot, push the blade body into the rotating slot, rotate the blade body to a specified angle, and then release the blade body, and push the blade body into the second limiting slot through the second spring. No other actions are required, making the operation simpler and novel, without the help of any tools, and greatly improving the efficiency of installation or disassembly.

[0024] 3. The present invention can conveniently remove the propeller hub from the surface of the drone body through a fixing assembly. The detachable propeller hub makes it easier to replace damaged or aged blades without replacing the entire motor, saving time and cost, and facilitating regular maintenance and cleaning. At the same time, the detachable propeller hub design allows users to replace blades of different types or sizes to meet different flight requirements, thereby improving flight efficiency or increasing flight stability.

[0025] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of an unmanned helicopter blade provided by the present invention;

[0027] Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the middle propeller clamp of the present invention.

[0029] In the figure:

[0030] 1-UAV body; 101-mounting seat; 102-fixing slot; 103-first limit slot;

[0031] 2-fixed unit; 201-propeller hub; 2011-groove; 202-movable compartment; 203-rotating shaft; 204-threaded tube; 2041-slider; 205-knob; 206-pushing block; 207-limiting rod; 208-first spring;

[0032] 3-paddle clamp; 301-connecting block; 302-telescopic slot; 303-telescopic rod; 304-block; 305-second spring; 306-second limiting slot; 307-rotation slot; 308-first connecting slot;

[0033] 4-propeller body; 401-slot; 402-fixing block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-3 The present invention provides an unmanned helicopter blade, comprising an unmanned helicopter body 1, a fixing unit 2, a blade clamp 3 and a blade body 4, wherein:

[0036] The fixing unit 2 is arranged on the surface of the drone body 1, the propeller clamp 3 is fixed on the surface of the fixing unit 2, and the blade body 4 is fixed on the surface of the propeller clamp 3; there are at least two groups of propeller clamps 3 and blade bodies 4, and they are evenly arranged in a ring shape on the surface of the fixing component; through the mutual cooperation of the propeller clamp 3 and the blade body 4, the blade body 4 can be quickly installed and removed from the surface of the propeller clamp 3, and the fixation between the blade body 4 and the propeller clamp 3 is completed without using bolts. Similarly, the disassembly between the blade body 4 and the propeller clamp 3 does not require auxiliary tools, thereby realizing the installation between the propeller clamp 3 and the blade body 4, and at the same time, with the cooperation of the fixing component, it is also convenient to install and disassemble the entire hub 201, thereby improving the disassembly efficiency of the device;

[0037] The drone body 1 includes a mounting seat 101 and a fixing groove 102 and a first limiting groove 103 formed on the surface of the mounting seat 101;

[0038] The fixed unit 2 includes a hub 201 and a movable chamber 202 provided inside the hub 201. The movable chamber 202 is provided with a rotating shaft 203, a threaded tube 204, a pushing block 206 and a limiting rod 207.

[0039] The paddle clamp 3 includes a connecting block 301 and a telescopic slot 302 formed on the surface of the connecting block 301 . A telescopic rod 303 and a clamping block 304 are arranged inside the telescopic slot 302 . A rotation slot 307 and a second limiting slot 306 are also formed on the surface of the telescopic slot 302 .

[0040] Specifically, the limiting rod 207 is disposed on the surface of the movable bin 202, and one end of the limiting rod 207 can be clamped in the first limiting groove 103;

[0041] Specifically, the propeller hub 201 matches the fixed groove 102, the propeller hub 201 is clamped inside the fixed groove 102, the rotating shaft 203 is passed through the surface of the movable chamber 202 through a bearing, the surface of the rotating shaft 203 is provided with a thread, the threaded tube 204 is movably connected with the rotating shaft 203 through the thread, a knob 205 is fixed to the other end of the rotating shaft 203, a groove 2011 is provided on the surface of the propeller hub 201, the knob 205 is arranged inside the groove 2011, and the push block 206 is fixed to one end of the threaded tube 204;

[0042] Specifically, a first spring 208 is sleeved on the surface of the limiting rod 207 , a stopper is fixed on the surface of the limiting rod 207 , the limiting rod 207 corresponds to the pushing block 206 , there are two telescopic rods 303 and two first springs 208 , and they are symmetrically arranged on both sides of the pushing block 206 .

[0043] It should be noted that the present invention can easily remove the propeller hub 201 from the surface of the drone body 1 through a fixing component. The detachable propeller hub 201 makes it easier to replace damaged or aged blades without replacing the entire motor, saving time and cost, and facilitating regular maintenance and cleaning. At the same time, the detachable propeller hub 201 design allows users to replace blades of different types or sizes to meet different flight requirements, thereby improving flight efficiency or increasing flight stability.

[0044] Specifically, a second connecting groove is opened on the surface of the hub 201, the connecting block 301 is fixed on the inner wall of the second connecting groove, the telescopic rod 303 is fixed on the inner wall of the telescopic groove 302, the clamping block 304 is fixed on one end of the telescopic rod 303 through a bearing, and a second spring 305 is sleeved on the surface of the telescopic rod 303.

[0045] Specifically, a first connecting groove 308 is further formed on the surface of the telescopic groove 302 . The first connecting groove 308 is connected to the rotating groove 307 , and the second limiting groove 306 is connected to the rotating groove 307 .

[0046] Specifically, a fixing block 402 is fixed on the surface of the blade body 4 , and the fixing block 402 matches the first connecting groove 308 , the rotating groove 307 and the second limiting groove 306 . A clamping groove 401 is also provided on the surface of the blade body 4 , and the clamping groove 401 corresponds to the clamping block 304 .

[0047] It should be noted that the present invention combines the telescopic slot 302, the second spring 305, the clamping block 304, the second limiting slot 306 and the first connecting slot 308, so that when installing the blade, it is only necessary to push the fixed block 402 on the surface of the blade to align with the first connecting slot 308, and make the clamping block 304 clamped in the clamping slot 401, push the blade body 4 into the rotating slot 307, rotate the blade body 4 to a specified angle, and then release the blade body 4, and push the blade body 4 into the second limiting slot 306 through the second spring 305, without adding other actions, making its operation simpler and novel, without the aid of any tools, and greatly improving the efficiency of installation or disassembly.

[0048] A slider 2041 is fixed to the side of the threaded tube 204, and a slide groove is opened on the surface of the movable bin 202. The slider 2041 can be slidably connected in the slide groove, and the threaded tube 204 can be movably connected in the movable bin 202 through the slider 2041 and the slide groove. There are two groups of sliders 2041 and slide grooves, and they are symmetrically arranged on both sides of the threaded tube 204.

[0049] Working principle: first, place the unmanned helicopter blade in a suitable position, then align the fixed block 402 on the surface of the blade body 4 with the first connecting groove 308 on the surface of the blade clamp 3, and then push the blade body 4 so that the fixed block 402 can move in the first connecting groove 308, and at the same time, the clamping block 304 can be clamped in the clamping groove 401 on the surface of the blade body 4. When the fixed block 402 moves to the rotating groove 307, the blade body 4 can be rotated, and at the same time, the fixed block 402 fixed on the side of the blade body 4 and the clamping block 304 fixed at one end of the telescopic rod 303 through the bearing can be driven to rotate synchronously. When the blade body 4 rotates to a specified angle, under the action of the rebound force of the second spring 305, the fixed block 402 is pushed to the second limiting groove 306 to complete the fixation of the blade body 4.

[0050] Then, place the hub 201 with the blade body 4 fixed in the fixing groove 102, and then turn the knob 205 to drive the rotating shaft 203 to rotate. With the cooperation of the slider 2041 and the sliding groove, the rotating shaft 203 can drive the threaded tube 204 to move, thereby driving the pushing block 206 fixed at one end of the threaded tube 204 to move synchronously, and then the pushing block 206 pushes the limiting rod 207 to move to both sides. When one end of the limiting rod 207 is clamped in the first limiting groove 103, stop turning the knob 205 to complete the fixation of the hub 201.

[0051] Compared with the prior art, the unmanned helicopter blade has the following beneficial effects:

[0052] 1. The present invention can quickly install and remove the blade body from the surface of the blade clamp through the mutual cooperation between the blade clamp and the blade body, and can complete the fixation between the blade body and the blade clamp without using bolts. Similarly, the separation between the blade body and the blade clamp does not require auxiliary tools, thereby facilitating the installation between the blade clamp and the blade body. At the same time, in conjunction with the fixing assembly, it is also convenient to install and remove the entire hub, thereby improving the disassembly efficiency of the device.

[0053] 2. The present invention combines the telescopic slot, the second spring, the clamping block, the second limiting slot and the first connecting slot, so that when installing the blade, it is only necessary to push the fixed block on the surface of the blade to align with the first connecting slot, and clamp the clamping block in the clamping slot, push the blade body into the rotating slot, rotate the blade body to a specified angle, and then release the blade body, and push the blade body into the second limiting slot through the second spring. No other actions are required, making the operation simpler and more novel, without the aid of any tools, and greatly improving the efficiency of installation or disassembly.

[0054] 3. The present invention can conveniently remove the propeller hub from the surface of the drone body through a fixing assembly. The detachable propeller hub makes it easier to replace damaged or aged blades without replacing the entire motor, saving time and cost, and facilitating regular maintenance and cleaning. At the same time, the detachable propeller hub design allows users to replace blades of different types or sizes to meet different flight requirements, thereby improving flight efficiency or increasing flight stability.

[0055] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention.

Claims

1. An unmanned helicopter blade, characterized in that: The invention comprises a drone body (1), a fixing unit (2), a propeller clamp (3) and a propeller blade body (4), wherein: The fixing unit (2) is arranged on the surface of the drone body (1), the propeller clamp (3) is fixed on the surface of the fixing unit (2), and the blade body (4) is fixed on the surface of the propeller clamp (3); the propeller clamp (3) and the blade body (4) each have at least two groups, and are evenly arranged in a ring shape on the surface of the fixing component; through the mutual cooperation between the propeller clamp (3) and the blade body (4), the blade body (4) can be quickly installed and removed from the surface of the propeller clamp (3); The drone body (1) comprises a mounting seat (101) and a fixing groove (102) and a first limiting groove (103) formed on the surface of the mounting seat (101); The fixed unit (2) comprises a propeller hub (201) and a movable chamber (202) disposed inside the propeller hub (201); a rotating shaft (203), a threaded tube (204), a pushing block (206) and a limiting rod (207) are disposed inside the movable chamber (202); The paddle clamp (3) comprises a connecting block (301) and a telescopic groove (302) provided on the surface of the connecting block (301), a telescopic rod (303) and a clamping block (304) are arranged inside the telescopic groove (302), and a rotating groove (307) and a second limiting groove (306) are also provided on the surface of the telescopic groove (302).

2. The unmanned helicopter blade according to claim 1, characterized in that: The limiting rod (207) is disposed on the surface of the movable bin (202), and one end of the limiting rod (207) can be snap-fitted into the first limiting groove (103).

3. The unmanned helicopter blade according to claim 1, characterized in that: The propeller hub (201) matches the fixing groove (102), the propeller hub (201) is clamped inside the fixing groove (102), the rotating shaft (203) is passed through the surface of the movable chamber (202) through a bearing, the surface of the rotating shaft (203) is provided with a thread, the threaded tube (204) is movably connected to the rotating shaft (203) through the thread, a knob (205) is fixed to the other end of the rotating shaft (203), a groove (2011) is provided on the surface of the propeller hub (201), the knob (205) is arranged inside the groove (2011), and a push block (206) is fixed to one end of the threaded tube (204).

4. The unmanned helicopter blade according to claim 1, characterized in that: A first spring (208) is sleeved on the surface of the limiting rod (207), a stopper is fixed on the surface of the limiting rod (207), the limiting rod (207) corresponds to the pushing block (206), and there are two telescopic rods (303) and two first springs (208), which are symmetrically arranged on both sides of the pushing block (206).

5. The unmanned helicopter blade according to claim 1, characterized in that: A second connecting groove is provided on the surface of the hub (201), a connecting block (301) is fixed on the inner wall of the second connecting groove, a telescopic rod (303) is fixed on the inner wall of the telescopic groove (302), a clamping block (304) is fixed on one end of the telescopic rod (303) via a bearing, and a second spring (305) is sleeved on the surface of the telescopic rod 303.

6. The unmanned helicopter blade according to claim 1, characterized in that: A first connecting groove (308) is also provided on the surface of the telescopic groove (302), the first connecting groove (308) is connected to the rotating groove (307), and the second limiting groove (306) is connected to the rotating groove (307).

7. The unmanned helicopter blade according to claim 1, characterized in that: A fixing block (402) is fixed on the surface of the blade body (4), and the fixing block (402) matches the first connection groove (308), the rotation groove (307) and the second limit groove (306). A clamping groove (401) is also provided on the surface of the blade body (4), and the clamping groove (401) corresponds to the clamping block (304).

8. The unmanned helicopter blade according to claim 1, characterized in that: First, the unmanned helicopter blade is placed in a suitable position, and then the fixed block (402) on the surface of the blade body (4) is aligned with the first connecting groove (308) on the surface of the blade clamp (3), and then the blade body (4) is pushed so that the fixed block (402) can move in the first connecting groove (308), and at the same time, the clamping block (304) can be clamped in the clamping groove (401) on the surface of the blade body (4). When the fixed block (402) moves to the rotation groove (307), the blade body (4) can be rotated, and at the same time, the fixed block (402) fixed on the side of the blade body (4) and the clamping block (304) fixed to one end of the telescopic rod (303) through the bearing can be driven to rotate synchronously. When the blade body (4) rotates to a specified angle, under the action of the rebound force of the second spring (305), the fixed block (402) is pushed to the second limiting groove (306), thereby completing the fixation of the blade body (4); Then, the propeller hub (201) fixed with the propeller blade body (4) is placed in the fixing groove (102), and then the knob (205) is turned to drive the rotating shaft (203) to rotate. With the cooperation of the slider (2041) and the sliding groove, the rotating shaft (203) can drive the threaded tube (204) to move, thereby driving the pushing block (206) fixed at one end of the threaded tube (204) to move synchronously, and then the pushing block (206) pushes the limiting rod (207) to move to both sides. When one end of the limiting rod (207) is clamped in the first limiting groove (103), the knob (205) can be stopped from being turned, and the fixing of the propeller hub (201) is completed.

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