A rotor head suitable for unmanned helicopter

Abstract

The utility model discloses a rotor head suitable for an unmanned helicopter, comprising an inner shaft, one end of the inner shaft being movably connected to the rotor head by bolts, the outer surface of the rotor head being rotatably connected to a propeller hub, the number of the propeller hubs being four, and the four propeller hubs being evenly rotatably connected to the outer surface of the rotor head in the form of a circular array. The rotor head suitable for an unmanned helicopter is provided with a rotor head, a propeller clamp, a support shaft and a damper, and four groups of propeller clamps are evenly rotatably connected to the outer surface of the rotor head by the propeller hub to adapt to changes when the blade angle is adjusted. The force generated by the blade when encountering airflow can be reduced under the action of the damper, and the extra force borne on one side is transmitted to the other side by the four groups of propeller blades, and then the centrifugal force of the rotor head is used to offset the external forces, thereby achieving the purpose of stabilizing the fuselage, and the propeller hub is subjected to more even force, with good transmission and convenient adjustment, thereby ensuring the stability of the unmanned helicopter during flight.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a rotor head suitable for an unmanned helicopter. Background Art

[0002] As a key project in the development of modern science and technology, UAV technology is becoming more and more advanced. With the development of UAV technology, it has played an indispensable role in aerial photography, detection, stability maintenance, reconnaissance, rescue, plant protection, etc., and has occupied an extremely important position in both the civil and military fields. Unmanned helicopters have occupied an important position in the UAV industry with their flexibility and maneuverability.

[0003] After searching, Chinese patent publication (announcement) No. CN216232958U discloses a rotor head assembly for an unmanned helicopter, including a device main body, the device main body includes a connecting block, sleeve shafts are provided on both sides of the connecting block, a wing connecting head is provided on one side of the sleeve shaft, a clamping cylinder is provided at the bottom of the connecting block, through holes are opened on both sides of the clamping cylinder, a main shaft is provided inside the clamping cylinder, and clamping structures that can facilitate the installation and disassembly of the rotor head are provided on both sides of the main shaft. Through the provided clamping structure, it is easier for operators to install and disassemble the wings, which is convenient for operators to replace or repair the wings, thereby improving work efficiency.

[0004] Although the wings of the unmanned helicopter of the above patent are easy to disassemble, they have poor stability during use and are prone to causing the fuselage to shake, seriously affecting the execution of the mission. Therefore, it is necessary to design a rotor head suitable for unmanned helicopters to solve the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a rotor head suitable for an unmanned helicopter, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A rotor head suitable for an unmanned helicopter comprises an inner shaft, one end of the inner shaft is movably connected to the rotor head by bolts, the outer surface of the rotor head is rotatably connected to a propeller hub, the number of the propeller hubs is four, the four propeller hubs are rotatably connected to the outer surface of the rotor head in a circular array, one end of the propeller hub is fixedly connected to a propeller clamp; the inside of the propeller clamp is rotatably connected to a support shaft; the middle part of the outer surface of the support shaft is fixedly connected to a propeller blade, both sides of the outer surface of the support shaft are fixedly connected to a first connecting seat, the inner side surface of the first connecting seat is rotatably connected to a damper, one end of the damper is rotatably connected to a second connecting seat, and the second connecting seat is fixedly connected to the propeller hub.

[0008] In order to achieve the effect of strengthening the strength of the propeller clamp, as a rotor head suitable for an unmanned helicopter, the upper surface and the lower surface of the propeller clamp are fixedly connected with reinforcing ribs.

[0009] In order to achieve the effect of conveniently shielding the top of the rotor head, the utility model is a rotor head suitable for an unmanned helicopter, a sleeve is clamped in the middle of the upper surface of the rotor head, and a top cover is fixedly connected to the upper surface of the sleeve.

[0010] In order to facilitate the connection of the inner shaft, as a rotor head suitable for an unmanned helicopter, one end of the inner shaft is fixedly connected to a mounting plate, and a mounting hole is opened on the upper surface of the mounting plate.

[0011] In order to achieve the effect of facilitating the support of the outer shaft, the utility model is a rotor head suitable for an unmanned helicopter. The bottom of the outer surface of the inner shaft is rotatably connected to a base, the inner side surface of the base is rotatably connected to the outer shaft, and the middle part of the outer surface of the outer shaft is fixedly connected to a support ball.

[0012] In order to facilitate the control of the swash plate, the utility model is a rotor head suitable for an unmanned helicopter. The outer surface of the base is rotatably connected to a hydraulic rod, one end of the hydraulic rod is rotatably connected to the swash plate, and the swash plate is rotatably connected to a support ball.

[0013] In order to facilitate the adjustment of the flight direction of the UAV, the utility model is a rotor head suitable for an unmanned helicopter. The middle part of the outer surface of the support ball is rotatably connected to a connecting disk, the outer surface of the connecting disk is rotatably connected to a pull rod, one end of the pull rod is rotatably connected to a support arm, the support arm is fixedly connected to the propeller hub, there are four pull rods, and the four pull rods are evenly rotatably connected to the outer surface of the connecting disk in a circular array.

[0014] In order to achieve the effect of enhancing structural adaptability, the utility model is a rotor head suitable for an unmanned helicopter. The top of the outer surface of the outer shaft is rotatably connected to a first connecting plate, one side of the inner side of the first connecting plate is rotatably connected to a second connecting plate, and one end of the second connecting plate is rotatably connected to a connecting ear.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. In the utility model, through the arrangement of the rotor head, the blade clamps, the support shaft and the damper, four groups of blade clamps are evenly rotated and connected to the outer surface of the rotor head in the form of a circular array through the propeller hub to adapt to the changes in the blade angle when being adjusted. The force generated by the blade when encountering the airflow can be reduced under the action of the damper. The additional force borne on one side is transmitted to the other side through the four groups of blades, and then the centrifugal force of the rotor head is utilized to offset the external forces, thereby achieving the purpose of stabilizing the fuselage. The propeller hub is subjected to more even force, the transmission is good, and the adjustment is convenient, thereby ensuring the stability of the unmanned helicopter during flight.

[0017] 2. In the utility model, through the arrangement of the hydraulic rod, the pull rod, the first connecting plate and the second connecting plate, when the output end of the hydraulic rod is extended or retracted, the swash plate changes the angle of the pull rod through the connecting plate, thereby adjusting the angle of the propeller hub and controlling the direction of flight. It has strong adaptability, is easy to operate and is sensitive to response. The first connecting plate and the second connecting plate cooperate with each other, so that when the device adjusts the flight angle of the UAV, it can adapt to the angle change of the swash plate, thereby increasing the applicability of use. At the same time, it can share the strong torque force driven by the rotation of the rotor head, reduce the stress on the pull rod and enhance the structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional plan structure of an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the rotor head structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the hydraulic rod structure of an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the pull rod structure of an embodiment of the utility model.

[0023] In the figure: 1, inner shaft; 2, rotor head; 3, hub; 4, propeller clamp; 5, support shaft; 6, blade; 7, first connecting seat; 8, damper; 9, second connecting seat; 10, reinforcing rib; 11, ferrule; 12, top cover; 13, mounting plate; 14, mounting hole; 15, base; 16, outer shaft; 17, support ball; 18, hydraulic rod; 19, swash plate; 20, connecting plate; 21, pull rod; 22, support arm; 23, first connecting plate; 24, second connecting plate; 25, connecting ear. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] like Figure 1-5 As shown, a rotor head suitable for an unmanned helicopter comprises an inner shaft 1, one end of the inner shaft 1 is movably connected to the rotor head 2 by bolts, the outer surface of the rotor head 2 is rotatably connected to a propeller hub 3, there are four propeller hubs 3, the four propeller hubs 3 are rotatably connected to the outer surface of the rotor head 2 in the form of a circular array, one end of the propeller hub 3 is fixedly connected to a propeller clamp 4; the inside of the propeller clamp 4 is rotatably connected to a support shaft 5; the middle part of the outer surface of the support shaft 5 is fixedly connected to a propeller blade 6, both sides of the outer surface of the support shaft 5 are fixedly connected to a first connecting seat 7, the inner side surface of the first connecting seat 7 is rotatably connected to a damper 8, one end of the damper 8 is rotatably connected to a second connecting seat 9, and the second connecting seat 9 is fixedly connected to the propeller hub 3.

[0027] During specific use, through the arrangement of the rotor head 2, the blade clamp 4, the support shaft 5 and the damper 8, the rotor head 2 is fixed to the top of the inner shaft 1 by bolts, which is convenient for installation and disassembly, and is convenient for replacement and maintenance when damaged, saving costs. The inner shaft 1 is a hollow structure, and a laser radar and a GPS can be installed, and the application is flexible and diverse. The four groups of blade clamps 4 are evenly rotated and connected to the outer surface of the rotor head 2 in the form of a circular array through the hub 3 to adapt to the changes when the angle of the blade 6 is adjusted. The blade 6 is arranged on the inner side of the blade clamp 4 through the support shaft 5, which is convenient for integration and assembly, and helps to improve the assembly efficiency. One end of the damper 8 is connected to the support shaft 5 through the first connecting seat 7, and the other end is connected to the hub 3 through the second connecting seat 9, so that the force generated by the blade 6 when encountering the airflow can be reduced under the action of the damper 8, and the extra force borne on one side is transmitted to the other side through the four groups of blades 6, and then the centrifugal force of the rotor head 2 is used to offset each other, so as to achieve the purpose of stabilizing the fuselage. The hub 3 is more evenly stressed, the transmission is good, and the adjustment is convenient, so as to ensure the stability of the unmanned helicopter during flight.

[0028] In this embodiment, the upper surface and the lower surface of the paddle clamp 4 are both fixedly connected with reinforcing ribs 10 .

[0029] During specific use, the reinforcing ribs 10 are arranged and fixed to the upper and lower surfaces of the paddle clamp 4, so that the wall thickness of the upper and lower surfaces of the paddle clamp 4 is thicker, the force is better received, and the connection stability and connection strength are improved.

[0030] In this embodiment, a clamping sleeve 11 is clamped in the middle of the upper surface of the rotor head 2 , and a top cover 12 is fixedly connected to the upper surface of the clamping sleeve 11 .

[0031] During specific use, through the setting of the top cover 12, when the rotor head 2 is installed, the top cover 12 is clamped on the upper surface of the rotor head 2 through the clamping sleeve 11, and the two are connected by bolts, so that the protection of the top of the rotor head 2 is enhanced, avoiding the internal inner shaft 1 from being damaged by rain corrosion and extending the service life.

[0032] In this embodiment, one end of the inner shaft 1 is fixedly connected to a mounting plate 13 , and a mounting hole 14 is formed on the upper surface of the mounting plate 13 .

[0033] During specific use, by setting the mounting plate 13 and the mounting hole 14, the two cooperate with each other to connect the device to the drive shaft of the unmanned helicopter, making the connection more convenient and increasing the convenience of connection.

[0034] In this embodiment, the bottom of the outer surface of the inner shaft 1 is rotatably connected to a base 15 , the inner side surface of the base 15 is rotatably connected to an outer shaft 16 , and the middle of the outer surface of the outer shaft 16 is fixedly connected to a supporting ball 17 .

[0035] During specific use, through the setting of the outer shaft 16, the outer shaft 16 is rotatably connected to the inner side of the base 15, which can ensure that the inner shaft 1 and the outer shaft 16 maintain their own states unchanged when relative rotation occurs, thereby increasing the stability of the structure. In addition, setting the outer shaft 16 and the inner shaft 1 as hollow shafts can effectively reduce the weight. A support ball 17 is connected to the middle of the outer surface of the outer shaft 16 to support the inclined plate 19 and the connecting plate 20.

[0036] In this embodiment, a hydraulic rod 18 is rotatably connected to the outer surface of the base 15 , and a swash plate 19 is rotatably connected to one end of the hydraulic rod 18 . The swash plate 19 is rotatably connected to the supporting balls 17 .

[0037] During specific use, through the setting of the hydraulic rod 18, one end of the hydraulic rod 18 is connected to the base 15, and the other end is connected to the swash plate 19, and the swash plate 19 is rotatably connected to the outer surface of the support ball 17. When the output end of the hydraulic rod 18 is extended or retracted, the swash plate 19 can be driven to adjust the tilt angle on the outer surface of the support ball 17, thereby providing power support for the direction adjustment of the unmanned helicopter's flight.

[0038] In this embodiment, a connecting disk 20 is rotatably connected to the middle of the outer surface of the support ball 17, a pull rod 21 is rotatably connected to the outer surface of the connecting disk 20, one end of the pull rod 21 is rotatably connected to a support arm 22, the support arm 22 is fixedly connected to the hub 3, and there are four pull rods 21, which are evenly rotatably connected to the outer surface of the connecting disk 20 in a circular array.

[0039] During specific use, through the setting of the pull rod 21, the connecting plate 20 is rotatably connected to the outer surface of the supporting ball 17, one end of the pull rod 21 is connected to the connecting plate 20, and the other end is connected to the hub 3 through the support arm 22. Therefore, when the output end of the hydraulic rod 18 is extended or retracted, the swash plate 19 changes the angle of the pull rod 21 through the connecting plate 20, thereby adjusting the angle of the hub 3 and controlling the direction of flight. It has strong adaptability, is easy to operate, and is sensitive to response.

[0040] In this embodiment, the top of the outer surface of the outer shaft 16 is rotatably connected to a first connecting plate 23 , one side of the inner side of the first connecting plate 23 is rotatably connected to a second connecting plate 24 , and one end of the second connecting plate 24 is rotatably connected to a connecting ear 25 .

[0041] During specific use, through the arrangement of the first connecting plate 23 and the second connecting plate 24, one end of the first connecting plate 23 is rotatably connected to the outer surface of the outer shaft 16, and the other end is rotatably connected to the second connecting plate 24. The bottom of the second connecting plate 24 is connected to the connecting plate 20 through the connecting ear 25, so that when the device adjusts the flight angle of the drone, it can adapt to the angle change of the inclined plate 19, increase the applicability of use, and at the same time share the strong torque force brought by the rotation of the rotor head 2, reduce the stress on the pull rod 21, and enhance the structural strength.

[0042] Working principle: In use, the top cover 12 is clamped on the upper surface of the rotor head 2 by the clamping sleeve 11, and the rotor head 2 is fixed to the top of the inner shaft 1 by bolts. The inner shaft 1 is a hollow structure and can be installed with a laser radar and a GPS. The mounting plate 13 and the mounting hole 14 cooperate with each other to connect the device to the drive shaft of the unmanned helicopter. The four sets of propeller clamps 4 are evenly rotated and connected to the outer surface of the rotor head 2 in the form of a circular array through the hub 3 to adapt to the changes in the angle of the blades 6 during adjustment. The blades 6 are arranged on the inner side of the propeller clamps 4 through the support shaft 5. The force generated when encountering airflow can be reduced under the action of the damper 8. The extra force borne on one side is transmitted to the other side through the four sets of blades 6, and then the centrifugal force of the rotor head 2 is utilized to offset the external forces. , to achieve the purpose of stabilizing the fuselage, the reinforcing ribs 10 make the wall thickness of the upper and lower surfaces of the propeller clamp 4 thicker, improve the connection stability and connection strength, when the output end of the hydraulic rod 18 is extended and retracted, the swash plate 19 can be driven to adjust the tilt angle on the outer surface of the support ball 17, and the swash plate 19 changes the angle of the pull rod 21 through the connecting plate 20, thereby adjusting the angle of the propeller hub 3 and controlling the direction of flight. One end of the first connecting plate 23 is rotatably connected to the outer surface of the outer shaft 16, and the other end is rotatably connected to the second connecting plate 24. The bottom of the second connecting plate 24 is connected to the connecting plate 20 through the connecting ear 25, so that when the device adjusts the flight angle of the drone, it can share the strong torque driven by the rotation of the rotor head 2, reduce the stress on the pull rod 21, and enhance the structural strength.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A rotor head suitable for an unmanned helicopter, comprising an inner shaft (1), characterized in that: One end of the inner shaft (1) is movably connected to a rotor head (2) via a bolt, and the outer surface of the rotor head (2) is rotatably connected to a propeller hub (3), and the number of the propeller hubs (3) is four. The four propeller hubs (3) are evenly rotatably connected to the outer surface of the rotor head (2) in the form of a circular array, and one end of the propeller hub (3) is fixedly connected to a propeller clamp (4); The propeller clamp (4) is rotatably connected to a support shaft (5) inside; a propeller blade (6) is fixedly connected to the middle of the outer surface of the support shaft (5); both sides of the outer surface of the support shaft (5) are fixedly connected to a first connecting seat (7); the inner side surface of the first connecting seat (7) is rotatably connected to a damper (8); one end of the damper (8) is rotatably connected to a second connecting seat (9); and the second connecting seat (9) is fixedly connected to the propeller hub (3).

2. The rotor head suitable for an unmanned helicopter according to claim 1, characterized in that: The upper surface and the lower surface of the paddle clamp (4) are both fixedly connected with reinforcing ribs (10).

3. The rotor head suitable for an unmanned helicopter according to claim 1, characterized in that: A clamping sleeve (11) is clamped in the middle of the upper surface of the rotor head (2), and a top cover (12) is fixedly connected to the upper surface of the clamping sleeve (11).

4. The rotor head suitable for an unmanned helicopter according to claim 1, characterized in that: One end of the inner shaft (1) is fixedly connected to a mounting plate (13), and a mounting hole (14) is provided on the upper surface of the mounting plate (13).

5. The rotor head suitable for an unmanned helicopter according to claim 1, characterized in that: The bottom of the outer surface of the inner shaft (1) is rotatably connected to a base (15), the inner side surface of the base (15) is rotatably connected to an outer shaft (16), and the middle of the outer surface of the outer shaft (16) is fixedly connected to a support ball (17).

6. The rotor head suitable for an unmanned helicopter according to claim 5, characterized in that: The outer surface of the base (15) is rotatably connected to a hydraulic rod (18), one end of the hydraulic rod (18) is rotatably connected to a swash plate (19), and the swash plate (19) is rotatably connected to the supporting ball (17).

7. The rotor head suitable for an unmanned helicopter according to claim 5, characterized in that: The middle part of the outer surface of the support ball (17) is rotatably connected to a connecting disk (20), the outer surface of the connecting disk (20) is rotatably connected to a pull rod (21), one end of the pull rod (21) is rotatably connected to a support arm (22), the support arm (22) is fixedly connected to the hub (3), the number of the pull rods (21) is four, and the four pull rods (21) are evenly rotatably connected to the outer surface of the connecting disk (20) in the form of a circular array.

8. The rotor head suitable for an unmanned helicopter according to claim 5, characterized in that: The top of the outer surface of the outer shaft (16) is rotatably connected to a first connecting plate (23), one side of the inner side of the first connecting plate (23) is rotatably connected to a second connecting plate (24), and one end of the second connecting plate (24) is rotatably connected to a connecting ear (25).

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