High-wind-resistant multi-rotor unmanned aerial vehicle

Abstract

This invention relates to the field of unmanned aerial vehicle (UAV) technology and discloses a highly wind-resistant multi-rotor UAV. The UAV includes a main body with a wind speed and direction sensor fixedly mounted at its lower end. Six sets of rotor arms are fixedly mounted around the main body. A drive assembly is mounted on one side of each rotor arm, and a control assembly is mounted on the upper side of each drive assembly. Propeller blades are fixedly mounted on the upper side of each drive assembly. Each drive assembly includes a rotor sleeve fixedly fitted onto one side of a rotor arm, and two sets of motor mounts are fixedly disposed at one end of the rotor sleeve. This highly wind-resistant multi-rotor UAV, through coordinated use, can generate a horizontal component of lift by changing the angle of the propeller blades. When encountering crosswinds, the propeller blades are tilted towards the crosswind direction, and the resulting horizontal component of lift counteracts the thrust of the crosswind.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a highly wind-resistant multi-rotor UAV. Background Technology

[0002] A drone is an unmanned aircraft that is mainly controlled by radio remote control or by its own program. With the development of technology, there are many types of drones, which are involved in different industries and fields.

[0003] For example, CN114180052A discloses a high-wind-resistance multi-rotor drone device for inspection. At each of the four corners of the lower end face of the drone's center plate, a fixing block is fixedly installed. An arm fixing sleeve is mounted on each fixing block, and an arm is fitted onto the end of the arm fixing sleeve. The end of the arm is connected to a reverse-angle deformation mechanism, and the end of the reverse-angle deformation mechanism is connected to a motor mount. A brushless motor is mounted at the lower end of the motor mount, and a propeller is connected to the brushless motor. A landing gear mounting plate is connected to the lower end of the four fixing blocks. A landing gear mounting base is symmetrically installed at the lower end of the landing gear mounting plate, and a T-shaped landing gear is connected to the landing gear mounting base. A gimbal load is installed at the center of the bottom end of the landing gear mounting plate. This invention is scientifically and rationally designed, ensuring stable flight. The drone can tilt up and down by 20° in strong winds and can withstand winds of up to 12 m / s, significantly enhancing its wind resistance compared to traditional drones. Furthermore, because the motor achieves a certain tilt angle, the plane generated by the wind duct is smoother, resulting in stronger flight stability.

[0004] In the aforementioned device, an electric actuator controls the second sleeve to rotate on top of the first sleeve, causing the propeller to rotate and counteract changes in airflow. However, this device can only rotate the propeller in one direction, and since air is unstable and can blow from different directions, it cannot effectively respond to changes in airflow. Summary of the Invention

[0005] The main objective of this invention is to provide a highly wind-resistant multi-rotor drone that can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A high wind-resistant multi-rotor drone includes a multi-rotor drone body. A wind speed and direction sensor is fixedly installed at the lower end of the multi-rotor drone body. Six sets of rotor arms are fixedly installed around the multi-rotor drone body. A drive assembly is installed on one side of each of the six sets of rotor arms. A control assembly is installed on the upper side of each of the six sets of drive assemblies. A propeller is fixedly installed on the upper side of each of the six sets of drive assemblies. Each drive assembly includes a rotor sleeve fixedly fitted on one side of the rotor arm. Two sets of motor mounts are fixedly installed at one end of the rotor sleeve. Bolt positioning rods are movably arranged around the two sets of motor mounts. A first limiting ring is fixedly installed on the outer side of each of the four sets of bolt positioning rods. Nuts are threadedly connected to the lower side of each of the four sets of bolt positioning rods. A first motor is fixedly installed between the two sets of motor mounts. A transmission sleeve is fixedly installed on the upper side of the rotation shaft of the first motor. A transmission ball is movably arranged on the inner side of the transmission sleeve. A rotor drive shaft is fixedly installed on the upper end of the transmission ball. A second limiting ring is fixedly installed on the outer side of the rotor drive shaft.

[0008] Preferably, the outer side of the transmission ball is provided with several sets of first arc-shaped grooves, and the inner wall of the transmission sleeve is provided with second arc-shaped grooves corresponding to the positions of the several sets of first arc-shaped grooves. An arc-shaped bracket is fixedly provided on the inner side of the transmission sleeve, and an annular plate is fixedly provided on the upper side of the arc-shaped bracket. Several sets of circular rings are fixedly provided on the annular plate, and rolling balls are movably provided on the inner side of each of the several sets of circular rings.

[0009] Preferably, the control component includes a square shell fixedly mounted on the upper end of four sets of bolt positioning rods. Two sets of connecting shafts are fixedly mounted on the upper inner wall of the square shell near the front and one side. Threaded rods are rotatably mounted on the inner side of the two sets of connecting shafts. A second motor is fixedly mounted on one end of the upper inner wall of the square shell corresponding to the position of the threaded rod. A movable part is threadedly connected to the outer side of the threaded rod. A control slide is fixedly mounted on the upper side of the movable part. An movable opening is opened on the inner side of the control slide. Two sets of movable balls are movably fitted on the outer side of the movable opening. Movable openings are opened on the front and one side of the square shell corresponding to the position of the movable part. A circular opening is opened in the middle of the square shell.

[0010] Preferably, the propeller blade is fixedly installed with the rotor drive shaft, and the first limiting ring and nut on the bolt positioning rod are respectively set at both ends of the upper and lower motor base plates for clamping and fixing.

[0011] Preferably, the first motor rotating shaft passes through the upper interior of the motor base plate, the upper side of the transmission sleeve is set to an open state, a certain gap is provided between the inner wall of the transmission sleeve and the transmission ball, and the second limiting ring is restricted to the lower position of the propeller.

[0012] Preferably, the annular plate is positioned near the center of the gap between the transmission sleeve and the transmission ball, and several sets of the annular sleeves correspond to the positions of the first arc groove and the second arc groove, respectively, and several sets of the balls are respectively positioned in the first arc groove and the second arc groove.

[0013] Preferably, the square housing is located outside the four sets of bolt positioning rods, the two sets of threaded rods are fixedly connected to the corresponding set of second motor rotating shafts, the movable part passes through the inner side of the upper moving opening and connects to the control slide, and the two sets of control slides are respectively set at different height positions.

[0014] Preferably, the two sets of control slides are movably fitted on the outer side of a corresponding set of movable balls, the inner walls on both sides of the movable opening are arc-shaped, the movable balls are slidably disposed in the movable opening, the movable opening is adapted to the width of the movable part, and the circular opening is disposed on the outer side of the rotor drive shaft.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The six sets of first motors drive the fixed transmission sleeves to rotate, and the internal ball bearings drive the engaged transmission balls to rotate, which in turn drives the rotor drive shaft and the propeller blades to rotate. With the multi-rotor design, when encountering strong winds, the six rotors can simultaneously increase the speed of the multiple sets of first motors (or adjust the power of some motors accordingly) to quickly generate greater lift or thrust to counteract the impact of the wind.

[0017] Several sets of balls are set between the transmission sleeve and the transmission ball and are respectively inserted in the first arc groove and the second arc groove. This satisfies the requirement that the transmission sleeve drives the transmission ball and the propeller mounted on the upper side to rotate. The transmission is completed by the movable connection of the balls between the two. After the rotor transmission shaft drives the transmission ball to rotate, it can adapt to the rotation requirements of different directions. Regardless of the initial transmission direction, the movable connection of the balls can transmit power and work stably in complex motion scenarios.

[0018] By using wind speed and direction sensors to detect changes in strong airflow during flight, the system drives a corresponding second motor when facing strong airflow. This motor rotates a threaded rod on two sets of connecting shafts, driving the threaded movable parts and control slides to move laterally along the movement port. The two sets of second motors can also drive the two sets of control slides to move laterally forward and backward and left and right, thereby controlling the rotor drive shaft inside the movement port to tilt to different positions. The movement of the movable ball, the movement port, and the rotor drive shaft is designed to prevent the rotor drive shaft from being restricted by the control slides during rotation, thus allowing each set of propeller blades to independently complete angular rotation in different directions. By changing the angle of the propeller blades, the lift can generate a horizontal component. When encountering crosswinds, the propeller blades are tilted in the direction of the crosswind, and the resulting horizontal component counteracts the thrust of the crosswind, keeping the main body of the multi-rotor UAV stable and preventing it from being blown off course by the wind. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a high wind-resistant multi-rotor UAV according to the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of a high wind-resistant multi-rotor UAV according to the present invention;

[0021] Figure 3 This is a schematic diagram of the drive and control components of a high wind-resistant multi-rotor UAV according to the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the control component of a high wind-resistant multi-rotor UAV according to the present invention;

[0023] Figure 5 This is a partial cross-sectional view of the drive component of a high wind-resistant multi-rotor UAV according to the present invention. Figure 1 ;

[0024] Figure 6 This is a partial cross-sectional view of the drive component of a high wind-resistant multi-rotor UAV according to the present invention. Figure 2 ;

[0025] Figure 7 This is a partial structural diagram of the control component of a high wind-resistant multi-rotor unmanned aerial vehicle according to the present invention. Figure 1 ;

[0026] Figure 8 This is a partial structural diagram of the control component of a high wind-resistant multi-rotor unmanned aerial vehicle according to the present invention. Figure 2 .

[0027] In the diagram: 1. Multi-rotor UAV body; 2. Wind speed and direction sensor; 3. Rotor arm; 4. Drive assembly; 41. Rotor sleeve; 42. Motor mount; 43. Bolt positioning rod; 44. First limiting ring; 45. Nut; 46. First motor; 47. Transmission sleeve; 48. Transmission ball; 49. Rotor drive shaft; 410. Second limiting ring; 411. First arc groove; 412. Second arc groove; 413. Arc bracket; 414. Annular plate; 415. Circular sleeve; 416. Ball bearing; 5. Control assembly; 51. Square shell; 52. Connecting shaft; 53. Threaded rod; 54. Second motor; 55. Moving part; 56. Control slide; 57. Movable opening; 58. Movable ball; 59. Moving opening; 510. Circular opening; 6. Propeller blade. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Please see Figures 1-8 One embodiment of the present invention provides a high wind-resistant multi-rotor drone, comprising a multi-rotor drone body 1, a wind speed and direction sensor 2 fixedly installed at the lower end of the multi-rotor drone body 1, six sets of rotor arms 3 fixedly installed around the multi-rotor drone body 1, a drive assembly 4 respectively installed on one side of each of the six sets of rotor arms 3, a control assembly 5 respectively installed on the upper side of each of the six sets of drive assemblies 4, and a propeller 6 fixedly installed on the upper side of each of the six sets of drive assemblies 4. The drive assembly 4 includes a rotor sleeve 41 fixedly fitted on one side of the rotor arm 3, and two sets of propeller blades are fixedly disposed at one end of the rotor sleeve 41. The motor base plate 42 has bolt positioning rods 43 movably arranged around its four sides. Each of the four sets of bolt positioning rods 43 has a first limiting ring 44 fixedly arranged on its outer side. Each of the four sets of bolt positioning rods 43 has a nut 45 threadedly connected to its lower side. A first motor 46 is fixedly arranged between the two sets of motor base plates 42. A transmission sleeve 47 is fixedly arranged on the upper side of the rotating shaft of the first motor 46. A transmission ball 48 is movably arranged on the inner side of the transmission sleeve 47. A rotor transmission shaft 49 is fixedly arranged at the upper end of the transmission ball 48. A second limiting ring 410 is fixedly arranged on the outer side of the rotor transmission shaft 49.

[0031] The propeller 6 is fixedly installed with the rotor drive shaft 49. The first limiting ring 44 and nut 45 on the bolt positioning rod 43 are respectively clamped and fixed at both ends of the upper and lower motor base plates 42. The rotating shaft of the first motor 46 passes through the upper interior of the motor base plate 42. The upper side of the transmission sleeve 47 is set to an open state. A certain gap is provided between the inner wall of the transmission sleeve 47 and the transmission ball 48. The second limiting ring 410 restricts the propeller 6 to the lower position.

[0032] The six sets of first motors 46 drive the fixedly connected transmission sleeves 47 to rotate, and the internally set ball bearings 416 drive the engaged transmission balls 48 to rotate, driving the rotor drive shaft 49 and the propeller 6 to rotate. With the multi-rotor design, when encountering strong winds, the six rotors can simultaneously increase the speed of the multiple sets of first motors 46 (or adjust the power of some motors accordingly) to quickly generate greater lift or thrust to counteract the impact of the wind.

[0033] The outer side of the transmission ball 48 is provided with several sets of first arc-shaped grooves 411. The inner wall of the transmission sleeve 47 is provided with second arc-shaped grooves 412 corresponding to the positions of the several sets of first arc-shaped grooves 411. An arc-shaped bracket 413 is fixedly provided on the inner side of the transmission sleeve 47. An annular piece 414 is fixedly provided on the upper side of the arc-shaped bracket 413. Several sets of annular sleeves 415 are fixedly provided on the annular piece 414. A ball bearing 416 is movably provided on the inner side of each set of annular sleeves 415.

[0034] The annular plate 414 is positioned near the center of the gap between the transmission sleeve 47 and the transmission ball 48. Several sets of annular sleeves 415 correspond to the positions of the first arc groove 411 and the second arc groove 412, respectively, and several sets of ball bearings 416 are respectively positioned in the first arc groove 411 and the second arc groove 412.

[0035] Several sets of balls 416 are arranged between the transmission sleeve 47 and the transmission ball 48 and are respectively inserted in the first arc groove 411 and the second arc groove 412. This satisfies the requirement that the transmission sleeve 47 drives the transmission ball 48 and the propeller 6 mounted on the upper side to rotate. The transmission is completed by the movable connection between the balls 416 and the transmission ball 48. After the rotor transmission shaft 49 drives the transmission ball 48 to rotate, it can adapt to the rotation requirements in different directions. Regardless of the initial transmission direction, the movable connection of the balls 416 can transmit power and work stably in complex motion scenarios.

[0036] The control component 5 includes a square shell 51 fixedly mounted on the upper end of four sets of bolt positioning rods 43. Two sets of connecting shafts 52 are fixedly mounted on the upper inner wall of the square shell 51 near the front and one side. Threaded rods 53 are rotatably mounted on the inner side of the two sets of connecting shafts 52. A second motor 54 is fixedly mounted on one end of the upper inner wall of the square shell 51 corresponding to the position of the threaded rod 53. A movable part 55 is threadedly connected to the outer side of the threaded rod 53. A control slide 56 is fixedly mounted on the upper side of the movable part 55. An movable opening 57 is opened on the inner side of the control slide 56. Two sets of movable balls 58 are movably sleeved on the outer side of the movable opening 57. Movable openings 59 are opened on the front and one side of the square shell 51 corresponding to the position of the movable part 55. A circular opening 510 is opened in the middle of the square shell 51.

[0037] A square shell 51 covers the outside of four sets of bolt positioning rods 43. Two sets of threaded rods 53 are fixedly connected to the corresponding set of rotating shafts of the second motor 54. The movable part 55 passes through the inner side of the upper movable opening 59 and connects to the control slide 56. The two sets of control slides 56 are respectively set at different height positions. The two sets of control slides 56 are movably sleeved on the outer side of the corresponding set of movable balls 58. The inner walls on both sides of the movable opening 57 are arc-shaped. The movable balls 58 are slidably set in the movable opening 57. The movable opening 59 is adapted to the width of the movable part 55. The circular opening 510 is set on the outside of the rotor drive shaft 49.

[0038] By using wind speed and direction sensors 2 to detect changes in strong airflow during flight, the system drives the corresponding second motor 54 when facing strong airflow. This drives the threaded rod 53 to rotate on the two sets of connecting shafts 52, which in turn drives the threaded movable part 55 and the control slide 56 to move laterally along the moving opening 59. The two sets of second motors 54 can also drive the two sets of control slides 56 to move laterally forward and backward and left and right, thereby controlling the rotor drive shaft 49 inside the moving opening 57 to tilt in different positions. The movable ball 58, the moving opening 57, and the rotor drive shaft 49 are designed to prevent the rotor drive shaft 49 from being restricted by the control slide 56 during rotation, thus allowing each set of propeller blades 6 to independently complete angular rotation in different directions. By changing the angle of the propeller blades 6, the lift can generate a horizontal component. When encountering crosswinds, the propeller blades 6 are tilted in the direction of the crosswind, and the resulting horizontal component counteracts the thrust of the crosswind, keeping the main body 1 of the multi-rotor UAV stable and preventing it from being blown off course by the wind.

[0039] Working Principle: In operation, six sets of first motors 46 drive the fixedly connected transmission sleeves 47 to rotate. Internally installed ball bearings 416 drive the engaged transmission balls 48 to rotate, thus driving the rotor drive shaft 49 and the propeller 6 to rotate. The multi-rotor design allows the six rotors to simultaneously increase their speed (or adjust the power of some motors) in strong winds, quickly generating greater lift or thrust to counteract the wind's impact. Furthermore, several sets of ball bearings 416, positioned between the transmission sleeves 47 and the transmission balls 48, are respectively inserted into the first arc-shaped groove 411 and the second arc-shaped groove 412. This satisfies the requirement for the transmission sleeves 47 to drive the transmission balls 48 and the upper-mounted propeller 6 to rotate. The transmission is completed through the movable connection of the ball bearings 416 between the two, allowing the rotor drive shaft 49 to drive the transmission balls 48 to rotate, adapting to different rotational directions. Regardless of the initial transmission direction, the movable connection of the ball bearings 416 can transmit power, ensuring stable operation in complex motion scenarios. Additionally, the wind... The use of the wind speed sensor 2 detects changes in strong airflow during flight. When facing strong airflow, it drives the corresponding second motor 54, which in turn drives the threaded rod 53 to rotate on the two sets of connecting shafts 52. This drives the threaded movable part 55 and the control slide 56 to move laterally along the moving opening 59. The use of the two sets of second motors 54 can drive the two sets of control slides 56 to move laterally forward and backward and left and right, respectively. This controls the rotor drive shaft 49 inside the moving opening 57 to tilt to different positions. The movable ball 58, the moving opening 57, and the rotor drive shaft 49 are designed to prevent the rotor drive shaft 49 from being restricted by the control slide 56 during rotation, thus preventing it from adjusting in different directions. This allows each set of propeller blades 6 to independently complete angular rotation in different directions. By changing the angle of the propeller blades 6, the lift can generate a horizontal component. When encountering crosswinds, the propeller blades 6 are tilted in the direction of the crosswind, and the resulting horizontal component counteracts the thrust of the crosswind, keeping the main body 1 of the multi-rotor UAV stable and preventing it from being blown off course by the wind.

[0040] The multi-rotor drone body 1, wind speed and direction sensor 2, rotor arm 3, first motor 46, second motor 54, and propeller 6 in this invention are common knowledge in the field, and their working principles are well-known technologies. The appropriate model is selected according to actual use, so it will not be explained in detail.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high wind-resistant multi-rotor unmanned aerial vehicle (UAV), comprising a multi-rotor UAV body (1), characterized in that: A wind speed and direction sensor (2) is fixedly installed at the lower end of the multi-rotor drone body (1). Six sets of rotor arms (3) are fixedly installed around the multi-rotor drone body (1). A drive assembly (4) is installed on one side of each of the six sets of rotor arms (3). A control assembly (5) is installed on the upper side of each of the six sets of drive assemblies (4). A propeller (6) is fixedly installed on the upper side of each of the six sets of drive assemblies (4). The drive assembly (4) includes a rotor sleeve (41) fixedly fitted on one side of the rotor arm (3). Two sets of motor mounts (42) are fixedly installed at one end of the rotor sleeve (41). The two sets of motor mounts (42) are surrounded by... Each of the four sets of bolt positioning rods (43) is movably provided with bolt positioning rods (43). Each of the four sets of bolt positioning rods (43) is fixedly provided with a first limiting ring (44) on its outer side. Each of the four sets of bolt positioning rods (43) is threaded with a nut (45) on its lower side. A first motor (46) is fixedly provided between the two sets of motor base plates (42). A transmission sleeve (47) is fixedly provided on the upper side of the rotating shaft of the first motor (46). A transmission ball (48) is movably provided on the inner side of the transmission sleeve (47). A rotor transmission shaft (49) is fixedly provided on the upper end of the transmission ball (48). A second limiting ring (410) is fixedly provided on the outer side of the rotor transmission shaft (49). The outer side of the transmission ball (48) is provided with several sets of first arc grooves (411), and the inner wall of the transmission sleeve (47) is provided with second arc grooves (412) corresponding to the positions of several sets of first arc grooves (411). An arc bracket (413) is fixedly provided on the inner side of the transmission sleeve (47), and an annular piece (414) is fixedly provided on the upper side of the arc bracket (413). Several sets of annular sleeves (415) are fixedly provided on the annular piece (414), and ball bearings (416) are movably provided on the inner side of several sets of annular sleeves (415). The control component (5) includes a square shell (51) fixedly mounted on the upper end of four sets of bolt positioning rods (43). Two sets of connecting shafts (52) are fixedly mounted on the upper inner wall of the square shell (51) near the front and one side. Threaded rods (53) are rotatably mounted on the inner side of the two sets of connecting shafts (52). A second motor (54) is fixedly mounted on one end of the upper inner wall of the square shell (51) corresponding to the position of the threaded rod (53). A movable part (55) is threadedly connected to the outer side of the threaded rod (53). A control slide (56) is fixedly mounted on the upper side of the movable part (55). An movable opening (57) is opened on the inner side of the control slide (56). Two sets of movable balls (58) are movably fitted on the outer side of the movable opening (57). Movable openings (59) are opened on the front and one side of the square shell (51) corresponding to the position of the movable part (55). A circular opening (510) is opened in the middle of the square shell (51). The annular piece (414) is disposed near the middle of the gap between the transmission sleeve (47) and the transmission ball (48), and several sets of the annular sleeves (415) correspond to the positions of the first arc groove (411) and the second arc groove (412) respectively, and several sets of the balls (416) are respectively disposed in the first arc groove (411) and the second arc groove (412); The square shell (51) covers the outside of the four sets of bolt positioning rods (43), the two sets of threaded rods (53) are fixedly connected to the corresponding set of second motor (54) rotating shafts, the movable part (55) passes through the inner side of the upper opening (59) and connects to the control slide (56), the two sets of control slides (56) are respectively set at different height positions; The two sets of control slides (56) are movably fitted on the outer side of the corresponding set of movable balls (58). The inner walls on both sides of the movable opening (57) are arc-shaped. The movable balls (58) are slidably disposed in the movable opening (57). The moving opening (59) is adapted to the width of the movable part (55). The circular opening (510) is disposed on the outer side of the rotor drive shaft (49).

2. The high wind resistance multi-rotor UAV according to claim 1, characterized in that: The propeller (6) is fixedly installed with the rotor drive shaft (49), and the first limiting ring (44) and nut (45) on the bolt positioning rod (43) are respectively clamped and fixed at both ends of the upper and lower motor base plates (42).

3. The high wind resistance multi-rotor UAV according to claim 1, characterized in that: The first motor (46) rotating shaft passes through the upper interior of the motor base plate (42), the upper side of the transmission sleeve (47) is set to an open state, a certain gap is provided between the inner wall of the transmission sleeve (47) and the transmission ball (48), and the second limiting ring (410) is restricted to the lower position of the propeller (6).

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