Novel unmanned helicopter rotor transmission structure

Abstract

The utility model belongs to the technical field of unmanned helicopter rotor wing structures, in particular to a novel unmanned helicopter rotor wing transmission structure, which is characterized in that the bottom of a stator is detachably connected with a bearing pressing piece matched with a radial spherical plain bearing; a mounting plate is arranged at the top of the inner shaft, a look-up steering engine and a roll steering engine are arranged on the mounting plate, a look-up steering engine rocker arm and a roll steering engine rocker arm are arranged on the look-up steering engine and the roll steering engine, and a first auxiliary frame and a second auxiliary frame are arranged on the outer side wall of the stator; steering engine connecting rods are hinged between the look-up steering engine rocker arm and the first auxiliary frame and between the roll steering engine rocker arm and the second auxiliary frame; an installation cavity is arranged between the rotor and the stator in a matched mode, a motor coil located in the installation cavity is arranged on the inner side wall of the stator, and a magnetic strip corresponding to the motor coil is arranged on the inner side wall of the rotor. Two sets of propeller hubs are arranged at the bottom of the rotor and located on the same horizontal line, and blades are detachably connected to the two sets of propeller hubs.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicle (UAV) rotor structures, in particular to a novel unmanned helicopter rotor transmission structure. Background Art

[0002] The function of the drone's rotor: It generates lift through rotation, allowing the drone to leave the ground and fly in the air; the attitude and flight direction of the drone can be controlled by controlling the speed and angle of the rotor. For example, by adjusting the speed and rotation direction of the rotor, flight actions such as pitch, roll and yaw can be achieved; the drone's rotor not only provides the power and lift required for flight, but is also a key component for achieving various complex flight missions. Its design and control have an important impact on the performance and function of the drone;

[0003] The defects of the current technical solution: when the motor, swash plate, reduction assembly and rotor are not integrated into the design, the number of parts of the whole machine is large, and reliability analysis and motion simulation analysis of each connected component are required during the design, which will increase the difficulty of helicopter design and reduce the reliability of the whole machine;

[0004] When the motor, swash plate, reduction assembly and rotor are not integrated, the overall structure is large in size and occupies a large space, making it difficult to design a small electric helicopter. Various transmission control structures are complex and bulky, making them unsuitable for light and compact unmanned helicopters.

[0005] When various components are not integrated, each part needs to be selected, processed and assembled, which will significantly increase the cost and cycle of helicopter R&D and production, and it is impossible to put it into mass production in a short period of time;

[0006] When various components are not integrated, there are many parts of each type. The reliability of each part during flight is different, and the difficulty of replacing each part is also different, which will increase the difficulty of after-sales maintenance and reduce overall reliability;

[0007] To this end, the present application provides a novel unmanned helicopter rotor transmission structure to solve the above-mentioned technical problems. Utility Model Content

[0008] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a novel unmanned helicopter rotor transmission structure to solve the above-mentioned technical problems.

[0009] The solution adopted by the utility model is: a new type of unmanned helicopter rotor transmission structure, including a stator and a rotor, characterized in that:

[0010] The rotor is rotatably connected to the stator, a through hole is provided on the stator, an inner shaft is provided in the through hole, a shaft shoulder is provided in the through hole, a radial spherical bearing sleeved with the inner shaft and matched with the bottom of the shaft shoulder is provided in the through hole, and a bearing pressing piece matched with the radial spherical bearing is detachably connected to the bottom of the stator;

[0011] A mounting plate is provided on the top of the inner shaft, an upward-looking steering gear and a rolling steering gear are provided on the mounting plate, an upward-looking steering gear rocker arm and a rolling steering gear rocker arm are provided on the upward-looking steering gear and the rolling steering gear, a first auxiliary frame and a second auxiliary frame are provided on the outer side wall of the stator, and a steering gear connecting rod is hinged between the upward-looking steering gear rocker arm and the rolling steering gear rocker arm and the first auxiliary frame and the second auxiliary frame;

[0012] An installation chamber is provided between the rotor and the stator, a motor coil located in the installation chamber is provided on the inner side wall of the stator, and a magnetic strip corresponding to the motor coil is provided on the inner side wall of the rotor;

[0013] Two groups of propeller hubs are arranged at the bottom of the rotor, and the two groups of propeller hubs are arranged on the same horizontal line. The two groups of propeller hubs are detachably connected with propeller blades.

[0014] Preferably, the two groups of propeller hubs are provided with propeller clamps, propeller blades are arranged in the propeller clamps, and screws cooperating with the propeller blades are arranged on the propeller clamps.

[0015] Preferably, two sets of flange bearings are provided between the stator and the rotor.

[0016] Preferably, the first auxiliary frame and the second auxiliary frame are connected to the stator via screws.

[0017] Preferably, the steering gear connecting rod is connected to the first auxiliary frame and the second auxiliary frame via screws.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is one of the three-dimensional view angles of the present utility model.

[0020] Figure 2 It is one of the perspectives of the three-dimensional cross-sectional view of the present utility model.

[0021] Figure 3 yes Figure 2 A partial enlarged view of .

[0022] Figure numerals: 1. stator; 2. rotor; 3. through hole; 4. inner shaft; 5. shoulder; 6. radial spherical bearing; 7. bearing pressure piece; 8. mounting plate; 9. upward-looking servo; 10. rolling servo; 11. upward-looking servo rocker arm; 12. rolling servo rocker arm; 13. first auxiliary frame; 14. second auxiliary frame; 15. servo connecting rod; 16. mounting chamber; 17. motor coil; 18. propeller hub; 19. propeller blade; 20. propeller clamp; 21. flange bearing. DETAILED DESCRIPTION

[0023] The above and other technical contents, features and functions of the present invention are described in detail below with reference to the attached Figure 1-3 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0024] Various exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0025] Embodiment 1, a novel unmanned helicopter rotor transmission structure, comprising a stator 1 and a rotor 2, characterized in that:

[0026] The rotor 2 is rotatably connected to the stator 1, a through hole 3 is provided on the stator 1, an inner shaft 4 is provided in the through hole 3, a shaft shoulder 5 is provided in the through hole 3, a radial spherical bearing 6 is provided in the through hole 3 and sleeved with the inner shaft 4 and matched with the bottom of the shaft shoulder 5, and a bearing pressing piece 7 matched with the radial spherical bearing 6 is detachably connected to the bottom of the stator 1;

[0027] A mounting plate 8 is provided on the top of the inner shaft 4, an upward-looking steering gear 9 and a rolling steering gear 10 are provided on the mounting plate 8, an upward-looking steering gear rocker arm 11 and a rolling steering gear rocker arm 12 are provided on the upward-looking steering gear 9 and the rolling steering gear 10, a first auxiliary frame 13 and a second auxiliary frame 14 are provided on the outer side wall of the stator 1, and a steering gear connecting rod 15 is hinged between the upward-looking steering gear rocker arm 11 and the rolling steering gear rocker arm 12 and the first auxiliary frame 13 and the second auxiliary frame 14;

[0028] An installation chamber 16 is provided between the rotor 2 and the stator 1, and the inner wall of the stator 1 is provided with a motor coil 17 located in the installation chamber 16. The inner wall of the rotor 2 is provided with a magnetic strip corresponding to the motor coil 17, and the motor coil 17 is wound on a winding bracket reserved on the motor stator 1.

[0029] Two sets of propeller hubs 18 are provided at the bottom of the rotor 2. The two sets of propeller hubs 18 are arranged on the same horizontal line. The two sets of propeller hubs 18 are detachably connected with propeller blades 19.

[0030] The two groups of propeller hubs 18 are provided with propeller clamps 20, propeller blades 19 are arranged inside the propeller clamps 20, and screws cooperating with the propeller blades 19 are arranged on the propeller clamps 20;

[0031] Two sets of flange bearings 21 are provided between the stator 1 and the rotor 2;

[0032] The first auxiliary frame 13 and the second auxiliary frame 14 are connected to the stator 1 via screws;

[0033] The steering gear connecting rod 15 is connected to the first auxiliary frame 13 and the second auxiliary frame 14 via screws, and the steering gear connecting rods 15 of the pitch steering gear and the roll steering gear are connected to the first auxiliary frame 13 and the second auxiliary frame 14 via fisheye rod end joint bearings.

[0034] When in use, the two steering gear assemblies are arranged at 90 degrees and fixed on the mounting plate 8. The center of the mounting plate 8 is fixedly connected with the inner shaft 4 by screw connection. The mounting plate 8 is provided with an upward-looking steering gear 9 and a rolling steering gear 10. The upward-looking steering gear 9 and the rolling steering gear 10 are provided with an upward-looking steering gear rocker arm 11 and a rolling steering gear rocker arm 12. The outer side wall of the stator 1 is provided with a first auxiliary frame 13 and a second auxiliary frame 14. A steering gear connecting rod 15 is hinged between the upward-looking steering gear rocker arm 11 and the rolling steering gear rocker arm 12 and the first auxiliary frame 13 and the second auxiliary frame 14.

[0035] The motor is mounted on the inner shaft 4 through the internal radial spherical bearing 6, the inner shaft 4 is fixed on the steering gear mounting plate 8, and the motor stator 1 is connected to the steering gear through the steering gear connecting rod 15, so that the pitch, roll, yaw and lifting movement of the coaxial helicopter can be realized;

[0036] The inner shaft 4 is connected to the fused motor stator 1 through the radial spherical bearing 6. The upper end of the connection part between the inner shaft 4 and the inner ring of the radial spherical bearing 6 is designed with a shoulder structure to limit the upward movement of the radial spherical bearing 6. The lower end of the outer ring of the radial spherical bearing 6 is supported by the bearing pressure piece 7 to prevent the radial spherical bearing 6 from falling off. The bearing pressure piece 7 is connected to the motor stator 1 through screws, and the upper end surface of the bearing outer ring is limited by the shoulder inside the motor stator 1, so that the entire motor is fixed to a certain height position of the inner shaft 4 and cannot move; the design of the connection between the motor stator 1 and the radial spherical bearing 6 can realize the pitch and roll movement of the entire rotor, and the stator 1 and the radial spherical bearing 6 do not rotate relative to each other, thereby reducing movement friction and reducing additional power loss;

[0037] The upper end of the motor rotor 2 is connected to the stator 1 through the flange bearing 21 located at the upper end of the rotor 2. The lower end face of the flange of the upper flange bearing 21 is tightened and limited by the rotor 2, the lower end face of the outer ring of the upper flange bearing 21 is tightened and limited by the shaft shoulder of the motor rotor 2, and the upper end face of the inner ring of the upper flange bearing 21 is tightened and limited by the shaft shoulder of the motor stator 1, thereby ensuring that the flange bearing 21 can both rotate circumferentially and withstand axial overload.

[0038] The flange bearing 21 connecting the motor stator 1 and the rotor 2 is located at the lower end of the rotor 2. The upper end face and flange face of the outer ring of the lower end flange bearing 21 are both tightly limited by the shaft shoulder of the motor rotor 2. The lower end face of the inner ring of the lower end flange bearing 21 is tightly limited by the bearing pressing piece 7. The bearing pressing piece 7 is fixed to the motor rotor 2 by screws.

[0039] There is a gap between the motor rotor 2 and the motor coil 17 on the stator 1. The inner circle of the motor coil 17 skeleton is fixed on the circular end face of the motor stator 1. A gap is reserved between the outer circle of the motor coil 17 and the magnetic strip fixed on the motor rotor 2.

[0040] Two propeller hubs 18 are fixed on the motor rotor 2 at 180 degrees, the propeller hubs 18 are connected to the propeller clamps 20 by screws, the propeller clamps 20 are connected to the propeller blades 19 by screws, and are limited by another set of screws;

[0041] The structural layout of the utility model is different from that of the previous unmanned helicopter. The motor, the swash plate assembly and the rotor assembly are simplified and integrated. The motor is installed on the inner shaft 4 through the internal radial spherical bearing 6. The inner shaft 4 is fixed on the steering gear mounting plate 8. The motor stator 1 is connected to the steering gear through the steering gear connecting rod 15, so that the pitch, roll, yaw and lifting motion of the coaxial helicopter can be realized.

[0042] After simplifying and integrating the three components into one component, the number of parts is reduced, reducing the design workload; the number of overall parts is reduced, reducing the overall production cost and assembly cycle, and increasing overall reliability; after simplification and integration, the overall number of parts is reduced, the structure is simple and compact, the weight is light, and the motion transmission of pitch and roll is simplified, which facilitates the precise control of the helicopter attitude by the servo; after simplification and integration, the overall overload resistance is improved, the application field of electric unmanned helicopters is expanded, and the further miniaturization of unmanned helicopters becomes possible.

[0043] Based on the existing motors on the market, according to this design, the deep groove ball bearing is replaced with a flange bearing 21, the motor stator 1 is installed with a radial spherical bearing 6, the motor stator 1 is connected to the steering gear, and the outer end face of the rotor 2 is installed with a hub 18, which is connected to the propeller clamp 20 and the propeller blade 19. After the motor, the swash plate assembly and the rotor assembly are simplified and integrated, and the overall structure is connected to the steering gear assembly, the pitch, roll and other movements of the unmanned helicopter can be realized;

[0044] The mounting plate 8 is circular in shape, and the rotor blade clamp 20 and the propeller hub 18 can be designed to automatically unfold and fold. By using the present application, a circular cylinder-mounted helicopter can be designed, which is convenient for storage and carrying, and can be loaded in a cylinder and deployed in a specific way on certain platforms.

[0045] The above description is only for illustrating the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the protection scope of the present invention.

Claims

1. A novel unmanned helicopter rotor transmission structure, comprising a stator (1) and a rotor (2), characterized in that: The rotor (2) is rotatably connected to the stator (1); a through hole (3) is provided on the stator (1); an inner shaft (4) is provided in the through hole (3); a shaft shoulder (5) is provided in the through hole (3); a radial spherical bearing (6) is provided in the through hole (3) and is sleeved with the inner shaft (4) and matched with the bottom of the shaft shoulder (5); and a bearing pressing piece (7) matched with the radial spherical bearing (6) is detachably connected to the bottom of the stator (1); A mounting plate (8) is provided on the top of the inner shaft (4); an upward-looking steering gear (9) and a rolling steering gear (10) are provided on the mounting plate (8); an upward-looking steering gear rocker arm (11) and a rolling steering gear rocker arm (12) are provided on the upward-looking steering gear (9) and the rolling steering gear (10); a first auxiliary frame (13) and a second auxiliary frame (14) are provided on the outer side wall of the stator (1); a steering gear connecting rod (15) is hingedly connected between the upward-looking steering gear rocker arm (11) and the rolling steering gear rocker arm (12) and the first auxiliary frame (13) and the second auxiliary frame (14); An installation chamber (16) is provided between the rotor (2) and the stator (1); the inner wall of the stator (1) is provided with a motor coil (17) located in the installation chamber (16); and the inner wall of the rotor (2) is provided with a magnetic strip corresponding to the motor coil (17); Two groups of propeller hubs (18) are provided at the bottom of the rotor (2), and the two groups of propeller hubs (18) are arranged on the same horizontal line. The two groups of propeller hubs (18) are detachably connected with propeller blades (19).

2. The novel unmanned helicopter rotor transmission structure according to claim 1 is characterized in that: The two groups of propeller hubs (18) are provided with propeller clamps (20), propeller blades (19) are arranged inside the propeller clamps (20), and screws cooperating with the propeller blades (19) are arranged on the propeller clamps (20).

3. The novel unmanned helicopter rotor transmission structure according to claim 1 is characterized in that: Two sets of flange bearings (21) are provided between the stator (1) and the rotor (2).

4. The novel unmanned helicopter rotor transmission structure according to claim 1 is characterized in that: The first auxiliary frame (13) and the second auxiliary frame (14) are connected to the stator (1) via screws.

5. The novel unmanned helicopter rotor transmission structure according to claim 1 is characterized in that: The steering gear connecting rod (15) is connected to the first auxiliary frame (13) and the second auxiliary frame (14) via screws.

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