阅读说明：本技术 一种无人机草坪修剪装置 (Unmanned aerial vehicle lawn trimming means ) 是由 刘乙德 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种无人机草坪修剪装置,包括无人机,无人机下侧设有夹持机构,夹持机构下端设有维持水平的平衡机构,平衡机构下端设有除草机构,除草机构底端设有保持除草机构高度的辅助机构,除草机构上端设有挡料机构,本发明的有益效果：本发明通过刀片产生向上的气流,草屑上升后被第二刀片切碎,便于草屑腐烂在草坪上为其他作物提供养分,无须使用人员清理草屑,降低了劳动强度。(The invention discloses an unmanned aerial vehicle lawn trimming device, which comprises an unmanned aerial vehicle, wherein a clamping mechanism is arranged at the lower side of the unmanned aerial vehicle, a balance mechanism for maintaining the horizontal is arranged at the lower end of the clamping mechanism, a weeding mechanism is arranged at the lower end of the balance mechanism, an auxiliary mechanism for keeping the height of the weeding mechanism is arranged at the bottom end of the weeding mechanism, and a material blocking mechanism is arranged at the upper end of the weeding mechanism, and the unmanned aerial vehicle lawn trimming device has: according to the invention, the blades generate upward airflow, and the grass scraps are cut up by the second blade after rising, so that the grass scraps are rotted on the lawn to provide nutrients for other crops, no user is required to clean the grass scraps, and the labor intensity is reduced.)

1. The utility model provides an unmanned aerial vehicle lawn mowing device, includes unmanned aerial vehicle (1), its characterized in that: unmanned aerial vehicle (1) downside is equipped with fixture (10), fixture (10) lower extreme is equipped with maintains horizontally balance mechanism (20), balance mechanism (20) lower extreme is equipped with weeding mechanism (40), weeding mechanism (40) bottom is equipped with keeps auxiliary mechanism (60) of weeding mechanism (40) height, weeding mechanism (40) upper end is equipped with stock stop (70).

2. An unmanned aerial vehicle lawn mowing device according to claim 1, wherein: the clamping mechanism (10) comprises a connecting frame (11), the connecting frame (11) is arranged on the lower side of the unmanned aerial vehicle (1), cavities (12) are respectively arranged at two ends of the connecting frame (11), a movable plate (13) is arranged in each cavity (12), a spring (14) is arranged between each movable plate (13) and the inner wall of each cavity (12), sliding chutes (2) are respectively arranged at two ends of each cavity (12), sliding blocks (19) are respectively arranged at two ends of each movable plate (13) and are arranged in the corresponding sliding chutes (2), the outer end of each movable plate (13) extends to the outer side of each cavity (12) and is provided with a connecting pipe (15), a movable block (16) is arranged in each connecting pipe (15), a knob (17) is connected in each movable block (16), the knob (17) is screwed with the corresponding movable block (16), and the lower end of the knob (17) extends to the outer, the upper end of the moving block (16) is provided with a fixing plate (18), and the front end of the fixing plate (18) is arranged on the upper side of the unmanned aerial vehicle (1).

3. An unmanned aerial vehicle lawn mowing device according to claim 2, wherein: the balance mechanism (20) comprises a main control board (21), a partition board (22) is arranged in the middle of the connecting frame (11), the main control board (21) is arranged on the partition board (22), a connecting column (23) is arranged in the middle of the connecting frame (11), a balance frame (25) is arranged on the lower side of the connecting frame (11), a spherical first connecting groove (26) is arranged in the middle of the balance frame (25), a first round ball (24) is arranged at the lower end of the connecting column (23) and arranged in the first connecting groove (26), a plurality of uniformly distributed electric motors (27) are arranged on the partition board (22), a screw rod (28) is arranged at the lower end of each electric motor (27), the screw rod (28) is screwed with the partition board (22), a second connecting groove (30) corresponding to the screw rod (28) is arranged in the balance frame (25), a second round ball (29) is arranged at the lower end of the screw rod (28) and arranged in the second connecting groove (30), the two ends of the partition plate (22) are respectively provided with an angular velocity sensor (31), the lower end of the connecting frame (11) is provided with a dust guard (32), and the dust guard (32) is arranged on the outer side of the balancing stand (25).

4. An unmanned aerial vehicle lawn mowing device according to claim 3, wherein: the weeding mechanism (40) comprises a motor (41), a power cavity (42) is arranged at the lower end of the balance frame (25), the motor (41) is arranged in the power cavity (42), a first shaft tube (4) is arranged at the lower end of the power cavity (42), a power shaft (43) is arranged at the lower end of the motor (41) and is arranged in the first shaft tube (4), an extension tube (44) is arranged at the lower end of the power shaft (43), the lower end of the extension tube (44) extends to the lower side of the first shaft tube (4) and is provided with a transmission cavity (45), the bottom end of the extension tube (44) extends into the transmission cavity (45) and is provided with a drive bevel gear (46), two support rods (47) are respectively arranged at two ends in the transmission cavity (45), a drive bevel gear (48) is arranged on each support rod (47), and the drive bevel gear (48) is meshed with the drive bevel, the novel cutter is characterized in that a driven bevel gear (49) meshed with the drive bevel gear (48) is arranged on the lower side of the drive bevel gear (48), a transmission shaft (50) is connected in the driven bevel gear (49), a second shaft pipe (51) is arranged at the lower end of the transmission cavity (45), the lower end of the transmission shaft (50) extends to the lower side of the second shaft pipe (51) and is provided with a first cutter rest (54), a plurality of uniformly distributed inclined first blades (55) are arranged at the outer end of the first cutter rest (54), a second cutter rest (52) is arranged in the middle of the second shaft pipe (51), and a plurality of uniformly distributed inclined second blades (53) are arranged at the outer end of the second cutter rest (52).

5. An unmanned aerial vehicle lawn mowing device according to claim 4, wherein: complementary unit (60) are including screwed pipe (61), screwed pipe (61) are located transmission shaft (50) bottom, screwed pipe (61) outside is equipped with buffer tube (62), buffer tube (62) with screwed pipe (61) screw thread closes soon, buffer tube (62) lower extreme is equipped with cushion chamber (63), buffer tube (62) downside is equipped with buffering head (64), buffering head (64) upper end is equipped with limiting plate (65) and locates in cushion chamber (63), limiting plate (65) with be equipped with buffer spring (66) between cushion chamber (63) inner wall.

6. An unmanned aerial vehicle lawn mowing device according to claim 4, wherein: stock stop (70) include first base (71), first base (71) are located in the middle of first central siphon (4), first base (71) one side is equipped with second base (72), first base (71) both ends respectively are equipped with connecting rod (73), connecting rod (73) pass through second base (72) extend to second base (72) opposite side is equipped with nut (74), first base (71) lower extreme is equipped with first baffle (75), second base (72) lower extreme is equipped with second baffle (76).

Technical Field

The invention belongs to the field of unmanned aerial vehicles, relates to an unmanned aerial vehicle auxiliary device, and particularly relates to an unmanned aerial vehicle lawn trimming device.

Background

The unmanned aerial vehicle lawn trimmer can automatically trim the lawn, saves labor and time, but has the problem of uneven lawn cutting. For this reason, long-term research has been conducted, and various solutions have been proposed.

For example, chinese patent document discloses a lawn mowing system based on an unmanned aerial vehicle [ application number: 201910167094.4], comprising an unmanned aerial vehicle body and a control center, wherein the unmanned aerial vehicle body comprises a cutting device, a power module, an intelligent detection module, a positioning navigation module and a height measurement module; the power module is used for providing flight power for the unmanned aerial vehicle body and driving the cutting device; the cutting device is arranged at the bottom of the unmanned aerial vehicle body and comprises a gear box, a rotating shaft, a cutter clamping disc and metal blades, the input end and the output end of the gear box are respectively connected with the transmission gear shaft and the rotating shaft, and the rotating shaft is provided with the cutter clamping disc for fixing the metal blades; control center is connected with unmanned aerial vehicle body communication for receive unmanned aerial vehicle flight coordinate data, lawn height data and live-action image, and plan unmanned aerial vehicle's flying height and flight route. The invention realizes automatic trimming of different types of lawns, the trimming height meets the standard, and the manpower and the time are saved.

The grass dregs that cut through metal blade in above-mentioned scheme are overlength, and the grass bits can't rot in the short time, need the manual work to clear up, have improved user of service's intensity of labour.

Disclosure of Invention

The invention aims to solve the problems, and provides an unmanned aerial vehicle lawn trimming device.

In order to achieve the purpose, the invention adopts the following technical scheme: this unmanned aerial vehicle lawn trimming means includes unmanned aerial vehicle, its characterized in that: the unmanned aerial vehicle downside is equipped with fixture, the fixture lower extreme is equipped with maintains horizontally balance mechanism, the balance mechanism lower extreme is equipped with weeding mechanism, weeding mechanism bottom is equipped with the maintenance the auxiliary mechanism of weeding mechanism height, weeding mechanism upper end is equipped with the stock stop.

According to the invention, the weeding mechanism is creatively designed to generate upward airflow through the blades, grass clippings are cut up by the second blade after rising, the grass clippings are decayed on the lawn to provide nutrients for other crops, and the rotation directions of the first knife rest and the second knife rest are opposite, so that the generated torques can be balanced with each other, and the stability of the weeding mechanism is improved.

In the above-mentioned unmanned aerial vehicle lawn mowing device, the clamping mechanism includes a link, the link is disposed at the lower side of the unmanned aerial vehicle, cavities are disposed at two ends of the link, a movable plate is disposed in the cavities, springs are disposed between the movable plate and inner walls of the cavities, sliding grooves are disposed at two ends of the cavities, sliders are disposed at two ends of the movable plate and disposed in the sliding grooves, outer ends of the movable plate extend to the outer side of the cavities and are provided with connecting pipes, movable blocks are disposed in the connecting pipes, knobs are connected in the movable blocks, the knobs are screwed with threads of the movable blocks, lower ends of the knobs extend to the outer side of the connecting pipes, fixed plates are disposed at upper ends of the movable blocks, and front.

In the above lawn trimming device for unmanned aerial vehicle, the balancing mechanism comprises a main control board, a partition board is arranged in the middle of the connecting frame, the main control board is arranged on the clapboard, the connecting column is arranged in the middle of the connecting frame, the balance frame is arranged at the lower side of the connecting frame, a first spherical connecting groove is arranged in the middle of the balancing stand, a first round ball is arranged at the lower end of the connecting column and is arranged in the first connecting groove, a plurality of electric motors which are uniformly distributed are arranged on the partition board, the lower ends of the electric motors are provided with screw rods, the screw rod is screwed with the thread of the clapboard, a second connecting groove corresponding to the screw rod is arranged in the balancing stand, the lower end of the screw is provided with a second round ball and is arranged in the second connecting groove, the two ends of the partition plate are respectively provided with an angular velocity sensor, the lower end of the connecting frame is provided with a dust guard, and the dust guard is arranged on the outer side of the balancing stand.

In the above-mentioned unmanned aerial vehicle lawn mowing device, the weeding mechanism comprises a motor, a power chamber is arranged at the lower end of the balancing stand, the motor is arranged in the power chamber, a first shaft tube is arranged at the lower end of the power chamber, a power shaft is arranged at the lower end of the motor and arranged in the first shaft tube, a telescopic tube is arranged at the lower end of the power shaft, the lower end of the telescopic tube extends to the lower side of the first shaft tube and is provided with a transmission chamber, the bottom end of the telescopic tube extends into the transmission chamber and is provided with a driving bevel gear, two ends in the transmission chamber are respectively provided with a support rod, the support rods are provided with a transmission bevel gear, the transmission bevel gear is meshed with the driving bevel gear, a driven bevel gear meshed with the transmission bevel gear is arranged at the lower side of the, the transmission shaft lower extreme extends to second shaft pipe downside is equipped with first knife rest, first knife rest outer end is equipped with the first blade of a plurality of evenly distributed's slope, be equipped with the second knife rest in the middle of the second shaft pipe, second knife rest outer end is equipped with the second blade of a plurality of evenly distributed's slope.

In foretell unmanned aerial vehicle lawn mowing device, complementary unit includes the screwed pipe, the screwed pipe is located the transmission shaft bottom, the screwed pipe outside is equipped with the buffer tube, the buffer tube with the screwed pipe screw thread closes soon, the buffer tube lower extreme is equipped with the cushion chamber, the buffer tube downside is equipped with the buffering head, the overhead limiting plate that is equipped with of buffering is located the cushion chamber, the limiting plate with be equipped with buffer spring between the cushion chamber inner wall.

In the above unmanned aerial vehicle lawn trimming device, the material blocking mechanism comprises a first base, the first base is arranged in the middle of the first shaft pipe, a second base is arranged on one side of the first base, connecting rods are respectively arranged at two ends of the first base, the connecting rods extend to the other side of the second base through the second base and are provided with nuts, a first baffle is arranged at the lower end of the first base, and a second baffle is arranged at the lower end of the second base.

Compared with the prior art, the invention has the advantages that:

1. the clamping mechanism enables the connection between the trimming device and the unmanned aerial vehicle to be more flexible, the connecting pipes are arranged on two sides of the unmanned aerial vehicle through the outward pulling movable plate, the two sides of the unmanned aerial vehicle are clamped under the elastic action of the springs, the lower end face of the fixed plate at the upper end of the movable block is attached to the upper end face of the unmanned aerial vehicle through the rotation of the knob, rapid clamping and separation can be achieved, the working time can be increased through replacing the unmanned aerial vehicle after the unmanned aerial vehicle runs out of electric quantity, charging waiting is not needed.

2. The balance mechanism can keep the center of gravity of the equipment structure unchanged, when the unmanned aerial vehicle moves rapidly, the unmanned aerial vehicle can incline, the center of gravity of the weeding mechanism can be changed along with the inclination of the weeding mechanism, the control difficulty of the unmanned aerial vehicle is increased, meanwhile, the cutter rest inclines, so that the cutter blade is easy to collide with the ground to damage the cutter blade, when the unmanned aerial vehicle moves rapidly, the angular velocity sensor detects a corresponding inclination angle and controls a corresponding electric motor to start to drive a screw rod to ascend and descend through the main control board, the inclination angle of the balance frame offsets the inclination angle of the unmanned aerial vehicle, the weeding mechanism is always kept in a vertical state, and the stability of.

3. The weeding mechanism generates upward airflow through the blades, so that weeds are in a vertically upward state and are convenient to cut, meanwhile, grass scraps are cut up by the second blade after rising along with the airflow, the grass scraps are convenient to rot on a lawn and provide nutrients for other crops, the rotating directions of the first knife rest and the second knife rest are opposite, generated torques can be balanced, and the stability of the weeding mechanism is improved.

4. The auxiliary mechanism maintains the distance between the blade and the lawn by the buffer head abutting against the lawn, prevents the flight height of the unmanned aerial vehicle from changing to influence the stubble height of the lawn, improves the weeding quality of the lawn mower, simultaneously, the rotary buffer tube can adjust the distance between the buffer head and the first knife rest, is suitable for the requirements of different stubble heights of the lawn, and improves the practicability of the lawn mower.

5. The material blocking mechanism blocks grass scraps from flying through the first baffle and the second baffle, the outer end of the material blocking mechanism is downwards inclined to guide an ascending air flow generated by the blade downwards, the flight of the unmanned aerial vehicle can be prevented from being influenced by the grass scraps, and meanwhile, the first baffle and the second baffle bear the ascending air flow generated by the blade, so that the gravity of the unmanned aerial vehicle is reduced, the flight load of the unmanned aerial vehicle is reduced, and the practicability is improved.

Drawings

Fig. 1 is a front view of the apparatus structure of the present invention.

Fig. 2 is a bottom view of the apparatus structure of the present invention.

Fig. 3 is a partial cross-sectional view of the clamping mechanism of section a of fig. 1 of the present invention.

Fig. 4 is a top partial cross-sectional view of the B-section counterbalance mechanism of fig. 2 of the present invention.

Fig. 5 is a partial cross-sectional view of the striker of section C in fig. 1 of the present invention.

Fig. 6 is a top partial cross-sectional view of the weeding mechanism of fig. 2 in section D according to the present invention.

Fig. 7 is a partial sectional view of the auxiliary mechanism of section E in fig. 2 according to the present invention.

In the figure, 1, an unmanned aerial vehicle; 2. a chute; 4. a first shaft tube; 10. a clamping mechanism; 11. a connecting frame; 12. a cavity; 13. moving the plate; 14. a spring; 15. a connecting pipe; 16. a moving block; 17. a knob; 18. a fixing plate; 19. a slider; 20. a balancing mechanism; 21. a main control board; 22. a partition plate; 23. connecting columns; 24. a first round ball; 25. a balancing stand; 26. a first connecting groove; 27. an electric motor; 28. a screw; 29. a second sphere; 30. a second connecting groove; 31. an angular velocity sensor; 32. a dust-proof plate; 40. a weeding mechanism; 41. an electric motor; 42. a power cavity; 43. a power shaft; 44. a telescopic pipe; 45. a transmission cavity; 46. a drive bevel gear; 47. a strut; 48. a drive bevel gear; 49. a driven bevel gear; 50. a drive shaft; 51. a second shaft pipe; 52. a second tool holder; 53. a second blade; 54. a first tool holder; 55. a first blade; 60. an auxiliary mechanism; 61. a threaded pipe; 62. a buffer tube; 63. a buffer chamber; 64. a buffer head; 65. a limiting plate; 66. a buffer spring; 70. a stock stop mechanism; 71. a first base; 72. a second base; 73. a connecting rod; 74. a nut; 75. a first baffle plate; 76. a second baffle.

Detailed Description

As shown in fig. 1 to 7, the unmanned aerial vehicle lawn trimming device of the invention comprises an unmanned aerial vehicle 1, a clamping mechanism 10 is arranged at the lower side of the unmanned aerial vehicle 1, a balance mechanism 20 for maintaining the horizontal is arranged at the lower end of the clamping mechanism 10, a weeding mechanism 40 is arranged at the lower end of the balance mechanism 20, an auxiliary mechanism 60 for maintaining the height of the weeding mechanism 40 is arranged at the bottom end of the weeding mechanism 40, and a material blocking mechanism 70 is arranged at the upper end of the weeding mechanism 40.

The clamping mechanism 10 comprises a connecting frame 11, the connecting frame 11 is arranged at the lower side of the unmanned aerial vehicle 1, the upper end face of the connecting frame 11 is attached to the lower end face of the unmanned aerial vehicle 1, cavities 12 are respectively arranged at two ends of the connecting frame 11, a moving plate 13 is arranged in each cavity 12, the moving plate 13 is in sliding fit with the cavities 12, a spring 14 is arranged between the moving plate 13 and the inner wall of each cavity 12, chutes 2 are respectively arranged at two ends of each cavity 12, sliders 19 are respectively arranged at two ends of the moving plate 13 and are arranged in the chutes 2, the sliders 19 are in sliding fit with the chutes 2, the sliders 19 can limit the maximum pulling-out distance of the moving plate 13 and prevent the moving plate 13 from being separated from the cavities 12, the outer end of the moving plate 13 extends to the outer side of the cavity 12 and is provided with a connecting pipe 15, a moving block 16 is arranged in the connecting pipe 15, knob 17 lower extreme extends to the connecting pipe 15 outside, knob 17 is through clearance fit and 15 rotatable coupling of connecting pipe, 16 upper ends of movable block are equipped with fixed plate 18, 1 upside of unmanned aerial vehicle is located to fixed plate 18 front end, terminal surface and the laminating of 1 up end of unmanned aerial vehicle under the fixed plate 18, pull out movable plate 13 outward and make connecting pipe 15 arrange the unmanned aerial vehicle both sides in, and press from both sides tight 1 both sides of unmanned aerial vehicle under spring 14's elastic force effect, and rotatory knob 17 makes terminal surface and the laminating of 1 up end of unmanned aerial vehicle under the fixed plate 18 of movable block 16 upper end, can realize quick centre gripping and separation, can increase operating time through changing unmanned aerial vehicle 1 after unmanned aerial vehicle 1 exhausts the electric.

The balance mechanism 20 comprises a main control board 21, a partition board 22 is arranged in the middle of the connecting frame 11, the main control board 21 is arranged on the partition board 22, a connecting column 23 is arranged in the middle of the connecting frame 11, a balance frame 25 is arranged on the lower side of the connecting frame 11, a first spherical connecting groove 26 is arranged in the middle of the balance frame 25, a first spherical ball 24 is arranged at the lower end of the connecting column 23 and is arranged in the first connecting groove 26, the first spherical ball 24 is rotatably connected with the first connecting groove 26 through clearance fit, the first spherical ball 24 can rotate 30 degrees in any direction, at least four uniformly distributed electric motors 27 are arranged on the partition board 22, a screw 28 is arranged at the lower end of the electric motor 27, the screw 28 is screwed with the partition board 22, a second connecting groove 30 corresponding to the screw 28 is arranged in the balance frame 25, a second spherical ball 29 is arranged at the lower end of the screw 28 and is arranged in the second connecting groove 30, the second ball 29 can rotate 30 degrees in any direction, the two ends of the partition plate 22 are respectively provided with an angular velocity sensor 31, the angular velocity sensor 31 and the electric motor 27 are connected with the main control board 21 through a circuit, the lower end of the connecting frame 11 is provided with a dust guard 32, the dust guard 32 is arranged on the outer side of the balancing frame 25, the dust guard 32 can prevent dust from entering the balancing frame 25, the interior of the balancing frame 25 can be kept clean, the gravity center of the equipment structure can be kept unchanged, when the unmanned aerial vehicle 1 moves rapidly, the unmanned aerial vehicle can incline, the weeding mechanism 40 can change the gravity center along with the inclination, the control difficulty of the unmanned aerial vehicle 1 is increased, meanwhile, the blade is easy to collide with the ground to damage the blade due to the inclination of the blade rest, when the unmanned aerial vehicle moves rapidly and inclines, the angular velocity sensor 31 detects a corresponding inclination angle and controls the corresponding electric motor 27 to start through the main control board 21 to drive, the weeding mechanism 40 is always kept in a vertical state, and the stability of the invention is improved.

The weeding mechanism 40 comprises an electric motor 41, a power cavity 42 is arranged at the lower end of a balancing stand 25, the electric motor 41 is arranged in the power cavity 42, a first shaft pipe 4 is arranged at the lower end of the power cavity 42, a power shaft 43 is arranged at the lower end of the electric motor 41 and is arranged in the first shaft pipe 4, the power shaft 43 is rotatably connected with the power cavity 42 through a bearing, an extension pipe 44 is arranged at the lower end of the power shaft 43, the inner diameter of the extension pipe 44 is larger than the outer diameter of the power shaft 43, the extension pipe 44 can be fixed in position through the existing locking assembly technology, the extension pipe 44 synchronously rotates with the power shaft 43 through the matching relationship of a key and a key groove, the lower end of the extension pipe 44 extends to the lower side of the first shaft pipe 4 and is provided with a transmission cavity 45, the extension pipe 44 rotatably connects with the first shaft pipe 4, two ends in the transmission cavity 45 are respectively provided with a support rod 47, the support rods 47 are provided with a transmission bevel gear 48, the transmission bevel gear 48 is rotatably connected with the support rods 47 through bearings, the transmission bevel gear 48 is meshed with the drive bevel gear 46, the lower side of the transmission bevel gear 48 is provided with a driven bevel gear 49 meshed with the transmission bevel gear 48, the driven bevel gear 49 is connected with a transmission shaft 50, the driven bevel gear 49 rotates synchronously with the transmission shaft 50 through interference fit, the lower end of the transmission cavity 45 is provided with a second shaft pipe 51, the lower end of the transmission shaft 50 extends to the lower side of the second shaft pipe 51 and is provided with a first tool rest 54, the transmission shaft 50 is rotatably connected with the second shaft pipe 51 through clearance fit, the first tool rest 54 rotates synchronously with the transmission shaft 50 through interference fit, the outer end of the first tool rest 54 is provided with at least four inclined first blades 55 which are uniformly distributed, the middle, the outer end of the second knife rest 52 is provided with at least four inclined second blades 53 which are uniformly distributed, the inclination directions of the first blades 55 and the second blades 53 are opposite, upward airflow is generated through the blades, weeds are in a vertical upward state and are convenient to cut, grass clippings rise along with the airflow and then are cut by the second blades 53, the grass clippings are convenient to rot on a lawn and provide nutrients for other crops, the rotation directions of the first knife rest 54 and the second knife rest 52 are opposite, generated torques can be balanced, and the stability of the invention is improved.

The auxiliary mechanism 60 comprises a threaded pipe 61, the threaded pipe 61 is arranged at the bottom end of the transmission shaft 50, the threaded pipe 61 is rotatably connected with the transmission shaft 50 through a bearing, a buffer pipe 62 is arranged at the outer side of the threaded pipe 61, the buffer pipe 62 is screwed with the threaded pipe 61, a buffer cavity 63 is arranged at the lower end of the buffer pipe 62, a buffer head 64 is arranged at the lower side of the buffer pipe 62, a limit plate 65 is arranged at the upper end of the buffer head 64 and is arranged in the buffer cavity 63, the limit plate 65 is rotatably connected with the buffer cavity 63 through clearance fit, a buffer spring 66 is arranged between the limit, the distance between the blades and the lawn is maintained by the buffer head 64 abutting against the lawn, the change of the flying height of the unmanned aerial vehicle 1 is prevented from influencing the stubble height of the lawn, the weeding quality of the invention is improved, meanwhile, the distance between the buffer head 64 and the first cutter frame 54 can be adjusted, the requirements of different lawn stubble heights are met, and the practicability of the invention is improved.

The material blocking mechanism 70 comprises a first base 71, the first base 71 is arranged in the middle of the first shaft tube 4, a second base 72 is arranged at the rear side of the first base 71, connecting rods 73 are respectively arranged at two ends of the first base 71, the connecting rods 73 extend to the rear side of the second base 72 through the second base 72 and are provided with nuts 74, the inner walls of the first base 71 and the second base 72 are attached to the outer end of the first shaft tube 4, the first base 71 and the second base 72 are fixed at the outer end of the first shaft tube 4 through friction force, a first baffle 75 is arranged at the lower end of the first base 71, a second baffle 76 is arranged at the lower end of the second base 72, grass clippings are blocked by the first baffle 75 and the second baffle 76 from flying upward, the upward airflow generated by the blades can be guided downwards by the downward inclination of the outer ends, the unmanned aerial vehicle can be prevented from being influenced by the grass clippings, and the upward airflow generated by the blades is borne by the first baffle 75, reduce unmanned aerial vehicle's flight load, improved the practicality.

The specific operation mode of the specific embodiment of the invention is as follows: the power supply of the invention is a storage battery arranged in an unmanned aerial vehicle 1, when the unmanned aerial vehicle 1 is clamped, the connecting pipe 15 is pulled outwards according to the width of the unmanned aerial vehicle 1 to adjust the distance, the unmanned aerial vehicle 1 is placed between the connecting pipes 15 at two sides, then the connecting pipe 15 is loosened, the movable plate 13 drives the connecting pipe 15 to move inwards under the action of the spring 14, the inner wall of the connecting pipe 15 is attached to two ends of the unmanned aerial vehicle 1, two sides of the unmanned aerial vehicle 1 are clamped, the rotary knob 17 adjusts the height of the movable block 16, the lower end face of the fixed plate 18 at the front end of the movable block 16 is attached to the upper end face of the unmanned aerial vehicle 1, the clamping function is realized, the motor 41 is started to drive the telescopic pipe 44 to rotate through the power shaft 43, the telescopic pipe 44 drives the transmission cavity 45 and the driving bevel, the driven bevel gear 49 drives the first cutter frame 54 to rotate through the transmission shaft 50, the rotating directions of the first cutter frame 54 and the second cutter frame 52 are opposite, ascending air flow is generated simultaneously, the first cutter blade 55 cuts weeds, the second cutter blade 53 cuts grass clippings, in addition, the bottom end of the buffer head 64 is contacted with the lawn, the distance between the bottom end of the buffer head 64 and the first cutter frame 54 is the height of the lawn stubble, and the height of the buffer head 64 can be changed by rotating the buffer tube 62.

When unmanned aerial vehicle 1 moves the too fast slope that takes place, angular velocity sensor 31 detects the slope and sends electrical signal to main control board 21, and main control board 21 controls corresponding electric motor 27 and starts, and electric motor 27 drives the screw rod 28 rotation, and the screw rod 28 goes up and down to make the balancing stand 25 take place the slope, and unmanned aerial vehicle 1's inclination is offset to balancing stand 25 inclination, makes weeding mechanism keep vertical state.

The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms connection column, connection tube, moving block, strut, telescopic rod, first ball, first connection slot, buffer tube, buffer head, first base, connection rod, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.