CN110816844A

CN110816844A - Unmanned aerial vehicle's hoist subassembly

Info

Publication number: CN110816844A
Application number: CN201911232733.7A
Authority: CN
Inventors: 崔海信; 高飞; 崔博; 王琰; 张燕卿
Original assignee: Institute of Environment and Sustainable Development in Agriculturem of CAAS
Current assignee: Institute of Environment and Sustainable Development in Agriculturem of CAAS
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-02-21

Abstract

The invention relates to a lifting appliance assembly of an unmanned aerial vehicle. The lifting appliance assembly comprises a main connecting plate, a magnetic suction disc, a quick connector and a spray rod, wherein the magnetic suction disc is fixedly connected with the main connecting plate, and a magnetic suction surface of the magnetic suction disc faces to the upper part of the main connecting plate; the quick connection-peg is fixedly connected with the main connecting plate, a port at one end of the quick connection-peg faces the upper part of the main connecting plate, and the other end of the quick connection-peg is communicated with a nozzle on the spray rod; the spray rod is connected with the main connecting plate, and a nozzle is arranged on the spray rod. The lifting appliance component of the unmanned aerial vehicle is designed into an active tripping structure, so that the spraying lifting appliance can automatically drop when the unmanned aerial vehicle encounters a blockage during flying, and the safety of the unmanned aerial vehicle can be ensured.

Description

Unmanned aerial vehicle's hoist subassembly

Technical Field

The invention relates to the technical field of unmanned aerial vehicles, in particular to a lifting appliance assembly of an unmanned aerial vehicle.

Background

Because the labor cost of rural areas in China rises and most of the culturable land is fragmented and distributed, the plant protection unmanned aerial vehicle with certain flexibility and strong regional adaptability starts to be popularized and used on a large scale in recent years, however, in the operation process of the unmanned aerial vehicle, fog drop drifting is serious due to the influence of a rotor wing wind field and a natural wind field, and particularly when herbicide is used, the large-area phytotoxicity of different adjacent crop plots is caused, so that the comprehensive popularization and use of the plant protection unmanned aerial vehicle are limited. Statistics show that aerial sprays can cause 50% -75% of the droplets of the liquid medicine to drift and fail to reach the target area, while ground sprays are only 10% -35%.

The flight height of the plant protection unmanned aerial vehicle is an important factor influencing the fog drop drifting degree of a rotor wind field and a natural wind field, but the problem of fog drop drifting in the spraying operation process cannot be effectively solved by adjusting the flight height of the plant protection unmanned aerial vehicle, and when the unmanned aerial vehicle flies higher, the fog drop drifting can be obviously caused by the turbulent wind field formed by the natural wind field and the rotor, and the deposit adhesion in a target area cannot be effectively realized; although can weaken the influence of natural wind field when unmanned aerial vehicle flight is lower, its self rotor turbulent flow wind field can cause the violent swing of crop canopy, and the droplet can not effectively adhere to and can take place the drift, and low flight height excessively can cause unmanned aerial vehicle to meet to hinder the crash moreover, causes the unnecessary loss.

Therefore, it is necessary to provide a new solution to one or more problems of overall loss or droplet drift caused by improper flying height and spraying setting of the unmanned aerial vehicle.

Disclosure of Invention

In view of this, the present invention aims to provide a technical solution that can solve one or more problems of complete machine loss or droplet drifting and the like of an aerial plant protection unmanned aerial vehicle due to improper flying height and spraying setting.

The invention provides a lifting appliance component which mainly comprises a main connecting plate, a magnetic suction disc, a quick-connection connector and a spraying rod, wherein,

the magnetic suction disc is fixedly connected with the main connecting plate, and the magnetic suction surface of the magnetic suction disc faces to the upper part of the main connecting plate;

the quick connection-peg is fixedly connected with the main connecting plate, a port at one end of the quick connection-peg faces the upper part of the main connecting plate, and the other end of the quick connection-peg is communicated with a nozzle on the spray rod;

the spray rod is connected with the main connecting plate, and a nozzle is arranged on the spray rod.

According to the technical scheme, the lifting appliance component can be hung on a tripping main hanging rack component with an on/off electricity keeping electromagnetic component of the unmanned aerial vehicle through the magnetic suction disc of the main connecting plate and the quick connector buckle, and the on/off electricity keeping electromagnetic component can lose magnetism to actively trip when the operation is blocked, so that the unmanned aerial vehicle can safely return to the home.

According to an embodiment of the invention, the spreader component further comprises a telescopic device and a flexible infusion pipeline, the spray rod is connected with the main connecting plate through the telescopic device, and the quick connector is communicated with a nozzle on the spray rod through the flexible infusion pipeline.

According to the technical scheme, the lifting appliance component can be contracted to the belly position of the unmanned aerial vehicle when the unmanned aerial vehicle does not operate, so that the takeoff and landing of the unmanned aerial vehicle are not influenced; during operation, the lifting appliance component is downwards unfolded through the telescopic device, the height of the spray rod below the lifting appliance component can be reduced, the spray head is far away from the rotor wing and can be close to a crop canopy, and therefore the lifting appliance component can obviously reduce liquid drop drifting caused by self and a natural wind field, and further reduces dosage and unnecessary loss.

According to one embodiment of the invention, the telescopic device comprises a telescopic driving device and a telescopic rod, and the telescopic driving device drives the telescopic rod to extend and retract up and down.

According to one embodiment of the invention, the telescopic drive is an electric spindle nut drive or a steering servomotor.

According to an embodiment of the present invention, the telescopic rod is a multi-section combined telescopic rod structure or a parallelogram telescopic link structure.

The multi-section combination drawbar type telescoping structure may be similar to the drawbar structure of a luggage case.

According to one embodiment of the invention, the electric screw and nut transmission mechanism mainly comprises a steering engine (or a common motor), a coupler, a positive and negative tooth driving screw, a guide rod, a driving slider nut-left-handed rotation and a driving slider nut-right-handed rotation, wherein the steering engine is connected with the positive and negative tooth driving screw through the coupler, the positive and negative tooth driving screw drives the driving slider nut-left-handed rotation and the driving slider nut-right-handed rotation sleeved on the positive and negative tooth driving screw to respectively move in opposite directions along the guide direction of the guide rod, the guide rod is fixedly connected with the main connecting plate, and the driving slider nut-left-handed rotation and the driving slider nut-right-handed rotation are respectively connected with telescopic rods at two sides of the parallelogram telescopic connecting rod.

According to the technical scheme, when the nut moves towards the middle, the parallelogram telescopic connecting rod structure extends, and when the nut moves towards the two ends, the parallelogram telescopic connecting rod structure shortens.

According to an embodiment of the present invention, the electric screw nut transmission mechanism further includes a bearing seat beam, a front and back teeth driving screw end sliding bearing and a middle sliding bearing, the bearing seat beam is connected to the main connecting plate, the guide rod is fixedly connected to the bearing seat beam, the front and back teeth driving screw end sliding bearing is disposed at two ends of the front and back teeth driving screw, the middle sliding bearing is disposed at a middle portion of the front and back teeth driving screw, and the front and back teeth driving screw end sliding bearing and the middle sliding bearing are both supported by the bearing seat beam.

In an embodiment of the present invention, the parallelogram telescopic link has a one-stage or multi-stage structure. I.e. comprises one or more groups of parallel connecting rod structures pivoted up and down.

According to one embodiment of the invention, the electric screw nut transmission mechanism further comprises a travel switch, and the travel switch is arranged at the end of the left-hand or right-hand travel of the driving slider nut.

When the telescopic device ascends or descends to the travel switch, the telescopic device can be controlled to stop moving.

According to one embodiment of the invention, a steering servo motor is arranged at the lower end of the telescopic rod and connected with the spray rod to drive the spray rod to steer.

In the invention, the spray rod can be a long rod with a larger length span, so that the spraying range of the spray nozzle arranged on the spray rod is larger.

According to one embodiment of the invention, the middle of the spray bar is connected to the main connecting plate, and nozzles are arranged in the two side areas of the spray bar.

According to one embodiment of the invention, the spray bar is provided with a concave portion, the spray bar is connected with the main connecting plate through the concave portion by a telescopic device, and the nozzle is arranged on the non-concave portion.

According to an embodiment of the invention, the flexible infusion pipeline comprises a telescopic helical spring pipe, the telescopic helical spring pipe and the telescopic device are arranged in parallel, the upper end of the telescopic helical spring pipe is connected with the quick-connection plug, and the lower end of the telescopic helical spring pipe is connected with the nozzle.

According to the technical scheme, the lifting appliance component can be hung on a tripping main hanger component with an on/off electricity keeping electromagnetic component of the unmanned aerial vehicle through the magnetic suction disc of the main connecting plate and the quick connector buckle, and the on/off electricity keeping electromagnetic component can lose magnetism to actively trip when the operation is blocked, so that the unmanned aerial vehicle can safely return to the air; furthermore, the main body part of the lifting appliance assembly can be contracted to the belly position above the undercarriage when the unmanned aerial vehicle does not operate, so that the takeoff and landing of the unmanned aerial vehicle are not influenced; during operation, the spray rod below the lifting appliance component is downwards unfolded through the telescopic device, the height of the spray rod can be reduced, the spray rod can turn to the direction perpendicular to the undercarriage, the spray head is far away from the rotor wing and can be close to a crop canopy, the lifting appliance component can obviously reduce liquid drop drifting caused by the self and a natural wind field, and further liquid consumption and unnecessary loss are reduced.

Drawings

Fig. 1 is a schematic front view (partially in perspective) of a spreader assembly according to an embodiment of the invention in an extended position with the spray bar parallel to the pivot pins;

FIG. 2 is a schematic top view of a spreader assembly according to an embodiment of the present invention in an extended position with the spray bar and pivot pins parallel;

fig. 3a is a schematic top view (partially in perspective) of a spreader assembly according to an embodiment of the present invention in an extended state with the spray bar and pivot pins parallel;

FIG. 3b is a partial enlarged view of FIG. 3a according to one embodiment of the present invention;

FIG. 4 is a schematic left side view of a spreader assembly according to an embodiment of the invention in an extended position with the spray bar parallel to the pivot pins;

FIG. 5 is a cross-sectional schematic view of the positive and negative teeth screw drive assembly D-D of FIG. 2 in accordance with one embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a sliding bearing C-C in the middle of the driving screw with positive and negative teeth of FIG. 2 according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a-A of the end sliding bearing of the positive and negative teeth driving screw of FIG. 2 according to one embodiment of the present invention;

FIG. 8 is a flow chart of a method of use according to an embodiment of the present invention;

FIG. 9 is a schematic illustration of a spreader assembly according to an embodiment of the invention in a contracted condition;

the reference numbers illustrate:

18 magnetic chucks, 25 main connecting plates, 26 quick connectors, 28 bearing seat beams, 30 end sliding bearings, 31 guide rods, 32 driving slide block nuts-left rotation, 33 middle sliding bearings, 35 driving slide block nuts-right rotation, 36 positive and negative tooth driving screw rods, 37 couplers, 38 steering engines, 40 travel switches, 401 descending stop travel switches, 402 ascending stop travel switches, 44 basic rotating pins, 46 middle rotating pins, 47 middle long rotating pins, 48 telescopic mechanism long connecting rods, 49 telescopic mechanism short connecting rods, 50 steering engine lifting pins, 52 steering servo motors, R spray rods, R1 concave parts, 59 telescopic spiral spring pipes, 60 reducing liquid separation tee joints, 61 inner spray head branch pipes and 62 outer spray head branch pipes.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

The invention aims to provide a lifting appliance component for a plant protection unmanned aerial vehicle, which is applied to the field of pesticide spraying or other fields, so as to effectively improve the target aiming accuracy of a spraying machine of the unmanned aerial vehicle, reduce the fogdrop drifting, automatically drop and ensure the safety of the unmanned aerial vehicle.

As shown in fig. 1, the present invention proposes a spreader assembly which mainly comprises a main connection plate 25, a magnetic chuck 18, a quick-connect coupling 26 and a spray bar R.

The magnetic suction disc 18 is fixedly connected with the main connecting plate 25, and the magnetic suction surface of the magnetic suction disc 18 faces the upper part of the main connecting plate 25. The number of magnetic attraction discs 18 may be one or a set, preferably two symmetrically. Magnetism is inhaled face top and can be connected unmanned aerial vehicle's trip formula main stores pylon, inhales through magnetism and connects. The unmanned aerial vehicle can include the main hanger subassembly of dropout that has the power-on/off and keeps electromagnetic assembly, can make hoist subassembly initiative dropout through making power-on/off and keep electromagnetic assembly to lose magnetism when the operation meets hindering. The magnetic chuck may be an iron chuck.

The quick-connection plug 26 is fixedly connected with the main connecting plate 25, one end of the quick-connection plug 26 faces the upper part of the main connecting plate 25, and the other end of the quick-connection plug is communicated with the nozzle on the spray rod R. The quick-connect connector 26 is quickly connected to the main hanger, which is easy to install and to detach, and can be connected to a liquid solution to supply liquid to the nozzle below.

The spray rod R is connected with the main connecting plate 25, and a nozzle (or a spray head) is arranged on the spray rod R.

According to the technical scheme, the lifting appliance component can be hung on the tripping main hanging rack component with the outage holding electromagnetic component of the unmanned aerial vehicle through the magnetic suction disc of the main connecting plate and the quick connector buckle, and the outage holding electromagnetic component can lose magnetism to actively trip when the unmanned aerial vehicle is in operation and is blocked, so that the unmanned aerial vehicle can safely return to the home.

According to an embodiment of the present invention, the spreader assembly further includes a telescopic device and a flexible infusion pipeline, the spray rod is connected to the main connection plate through the telescopic device, and the quick connector 26 is communicated with the nozzle on the spray rod R through the flexible infusion pipeline.

According to the technical scheme, the lifting appliance assembly can be further retracted to the belly position above the undercarriage when the operation is not carried out, and the takeoff and landing of the unmanned aerial vehicle are not influenced; during operation, the lifting appliance component is downwards unfolded through the telescopic device, the height of the spray rod can be reduced, the spray head is far away from the rotor wing and can be close to a crop canopy, the lifting appliance component can obviously reduce liquid drop drifting caused by self and a natural wind field, and further the dosage and unnecessary loss are reduced.

As shown in fig. 2 and 5, according to an embodiment of the present invention, the electric screw-nut transmission mechanism mainly includes a steering engine 38 (or a common motor), a coupler 37, a driving screw 36 with positive and negative teeth, a guide rod 31, a driving slider nut-left-handed screw 32, and a driving slider nut-right-handed screw 35, where the steering engine 38 is connected to the driving screw 36 with positive and negative teeth through the coupler 37, the driving screw 36 with positive and negative teeth drives the driving slider nut-left-handed screw 32 and the driving slider nut-right-handed screw 35 sleeved thereon to move along the guide rod 31 in opposite directions, respectively, the guide rod 31 is fixedly connected to the main connecting plate 25, and the driving slider nut-left-handed screw 32 and the driving slider nut-right-handed screw 35 are connected to two side telescopic rods of the parallel telescopic link, respectively, as shown in fig.

According to an embodiment of the present invention, in order to limit the degree of freedom of the telescopic rod in the rotation direction around the axis of the forward and backward tooth driving screw, guide rods 31 are provided on both sides of the screw to provide guidance for the driving slider nut.

As can be seen from fig. 2 and 5, in the above-described embodiment, when the nuts 32, 35 are moved toward the middle, the parallelogram pantograph linkages can be extended, and when the nuts are moved toward the opposite ends, the parallelogram linkages can be shortened. The extended state of the parallelogram pantograph linkages is shown in fig. 1 and 4, and the shortened state of the parallelogram linkages is shown in fig. 9.

In an embodiment of the present invention, the parallelogram telescopic link has a one-stage or multi-stage structure. I.e. comprises one or more groups of parallel connecting rod structures pivoted up and down. As shown in fig. 1, this embodiment comprises a multi-stage parallel linkage configuration.

As shown in fig. 1 and 4, according to an embodiment of the present invention, the parallelogram telescopic links can be connected by a pivot pin, for example, a base pivot pin 44, a middle pivot pin 46, and a middle long pivot pin 47 can be connected to a telescopic mechanism long link 48 and a telescopic mechanism short link 49, both ends of a steering engine suspension pin 50 are connected to the telescopic mechanism short link 49, and the middle part is connected to a steering servo motor 52.

As shown in fig. 2, 5 and 7, according to an embodiment of the present invention, the electric screw-nut transmission further includes a bearing block beam 28, a front-back drive screw end sliding bearing 30 and a middle sliding bearing 33 (fig. 5), and the bearing block beam can be designed as a frame structure and can be disposed on both sides of the screw and along the length direction of the screw to support the screw and the guide rod. The guide rod 31 may be fixedly connected with the bearing block cross beam. The sliding bearing at the end part of the driving screw rod with the positive and negative teeth and the sliding bearing at the middle part can be supported by the beam of the bearing seat. The end sliding bearings of the positive and negative tooth driving screw rods are arranged at two ends of the positive and negative tooth driving screw rods, and the middle sliding bearings are arranged in the middle of the positive and negative tooth driving screw rods.

According to one embodiment of the present invention, the forward and reverse drive screws are three-point supported by bearings at both ends and in the middle. The intermediate slide bearing housing 33 is constructed as shown in fig. 6, with the forward and reverse drive screws 36 supported for rotation within the central main slide bearing 33. The drive screw is supported for rotation on both sides in end slide bearings 30, the detail of which is shown in figure 7.

As shown in fig. 3a, 3b, according to an embodiment of the present invention, the electric screw-nut transmission mechanism may further include a travel switch 40 provided at an end of the left-hand or right-hand travel of the driving slider nut.

According to an embodiment of the present invention, the travel switch 40 may include a rising end travel switch 402 and a falling end travel switch 401, which may be mounted on the mounting seats of the middle main sliding bearing 33 and the end sliding bearing 30, respectively, and the positions may be adjusted by screws to adjust the folding and unfolding limit positions of the telescopic device.

When the telescopic device ascends or descends to the travel switch, the stop motion of the telescopic device can be controlled through signal detection and transmission.

According to an embodiment of the present invention, the driving screw assembly of the front and back teeth drives the multi-stage parallelogram telescopic link rod in a manner that: the steering engine can drive the positive and negative screw rods to rotate through the single diaphragm coupler, when the steering engine rotates clockwise, the nuts on the two sides are folded towards the middle, the parallelogram connecting rod in the lifting appliance component is driven to be unfolded downwards, the height of the spray rod is reduced, the nut on the left side moves to the rightmost end, the travel switch is pressed down to stop descending, and the height of the spray rod is reduced to the lowest; when anticlockwise rotating, the nuts on the two sides are separated towards the two sides, the parallelogram connecting rod in the lifting appliance component is driven to be folded upwards, the height of the spray rod is lifted, the left nut can be pressed down to lift the travel switch when moving to the leftmost end, and the spray rod is folded.

According to an embodiment of the present invention, a steering servo motor 52 is provided at the lower end of the telescopic rod, and the steering servo motor 52 is connected to the spray bar R to drive the spray bar R to steer.

Spray lance R accessible bolt pair is installed on the rocking arm that turns to servo motor 52, and when unmanned aerial vehicle takes off or lands, the direction that unmanned aerial vehicle gos forward and retreat can be changeed to the spray lance, accepts in undercarriage below belly below position, and during the spraying operation, the rotatable 90 degrees of spray lance turns to the direction that perpendicular to unmanned aerial vehicle gos forward.

According to one embodiment of the invention, as shown in fig. 1, the spray bar R is provided with a concave portion R1, the spray bar R is connected to the main connection plate 25 via the concave portion R1, and the spray head is provided on a non-concave portion. The concave portion may be disposed in the middle of the spray bar. By the design, the space below the belly of the unmanned aerial vehicle can be fully utilized, so that the pesticide spraying lifting appliance is completely retracted below the belly of the unmanned aerial vehicle and positioned above the undercarriage when the pesticide spraying lifting appliance is not operated; meanwhile, the heights of the components such as the nozzles positioned on the non-concave parts at the two sides of the spray rod can be set to be consistent.

The width of the concave part of the concave rod piece takes the landing and the taking off of the unmanned aerial vehicle as the standard without influencing after the lifting appliance component is completely contracted.

According to one embodiment of the invention, the boom bar is retracted below the belly and above and parallel to the landing gear, wherein the parallelogram linkages of the spreader assembly turn 90 degrees when deployed or retracted.

According to one embodiment of the invention, the boom bar is retracted to lie immediately below and perpendicular to the landing gear, wherein the parallelogram linkages of the spreader assembly do not steer when deployed or retracted.

As shown in FIG. 1, according to an embodiment of the present invention, the flexible infusion tube may include a flexible helical spring tube 59, the flexible helical spring tube 59 is disposed in parallel with the telescopic device, the upper end of the flexible helical spring tube 59 is connected to the quick connector, and the lower end of the flexible helical spring tube 59 is connected to the nozzle. The telescoping coil spring tube 59 may be a flexible tube that is easily extended and retracted.

As shown in FIG. 1, the liquid delivery pipeline at the spray bar may include a variable diameter liquid distribution tee 60 and nozzle branches, and the nozzle branches may further include an inner nozzle branch 61 and an outer nozzle branch 62, which are connected to the nozzles. The upper interface of the flexible spiral spring tube 59 can be sleeved on the quick connector 26, and the lower interface can be sleeved on the variable diameter liquid-separating tee 60 and then respectively sent to the spray head or the spray nozzle.

The flexible liquid conveying pipeline can be provided with a plurality of sets according to the arrangement of the nozzles, and the arrangement form is determined according to the shapes of the spray rod and the nozzles. According to one embodiment of the invention, the flexible infusion line is a symmetrical left and right line. Correspondingly, the fast plug connectors and the like can also be in multiple groups.

According to the technical scheme, the lifting appliance component can be hung on a tripping main hanger component of the unmanned aerial vehicle through a magnetic suction disc of a main connecting plate and a quick connector buckle, the tripping main hanger component is provided with an on/off electricity keeping electromagnetic component, and the lifting appliance component can be actively tripped by enabling the on/off electricity keeping electromagnetic component to lose magnetism when the operation is blocked, so that the unmanned aerial vehicle can safely return to the home; furthermore, the lifting appliance component can be retracted to the belly position above the undercarriage when the unmanned aerial vehicle does not operate, so that the takeoff and landing of the unmanned aerial vehicle are not influenced; during operation, the lifting appliance component is downwards unfolded through the telescopic device, the height of the spray rod can be reduced, the spray rod can turn to the direction perpendicular to the undercarriage, the spray head is far away from the rotor wing and can be close to a crop canopy, the lifting appliance component can obviously reduce liquid drop drifting caused by the lifting appliance component and a natural wind field, and liquid consumption and unnecessary loss are reduced.

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Example 1

Referring to fig. 1-9, the spraying hanger assembly for the plant protection unmanned aerial vehicle of the embodiment mainly comprises a left magnetic chuck 18, a right magnetic chuck 18, a quick connector 26, a main connecting plate 25, a positive and negative screw driving assembly, a multi-stage parallelogram telescopic connecting rod, a spray rod 90-degree steering servo motor 52 and a concave integrated spray rod. And the multi-stage parallelogram telescopic connecting rod and the concave integrated spray rod are respectively provided with a transfusion hose, wherein a transfusion pipeline at the multi-stage parallelogram telescopic connecting rod is a telescopic spiral spring pipe 59.

The positive and negative tooth screw driving component comprises a bearing seat cross beam 28, a positive and negative tooth driving screw end sliding bearing 30, a guide rod 31, a driving slide block nut-left rotation 32, a middle sliding bearing 33, a driving slide block nut-right rotation 35, a positive and negative tooth driving screw 36, a single diaphragm coupling 37, a steering engine 38, a travel switch 40 and the like.

The multi-stage parallelogram telescopic connecting rod consists of a basic rotating pin 44, a middle rotating pin 46, a middle long rotating pin 47, a telescopic mechanism long connecting rod 48, a telescopic mechanism short connecting rod 49 and a steering engine hanging pin 50.

The mode that the multi-stage parallelogram telescopic connecting rod is driven by the positive and negative tooth driving screw rod assembly is that the positive and negative tooth screw rod 36 is driven by the steering engine 38 through the single diaphragm coupler 37 to rotate, when the screw rod rotates clockwise, the nuts 35 and 32 on the two sides are folded towards the middle to drive the multi-stage parallelogram connecting rod of the pesticide spraying lifting appliance assembly to expand downwards, the height of the spray rod is reduced, the nut 35 on the left side moves to the rightmost end, a descending stop stroke switch is pressed down, and the height of the spray rod is reduced to the lowest; when anticlockwise rotating, the nuts 35 and 32 on the two sides are separated towards the two sides, the multistage parallelogram connecting rod of the pesticide spraying lifting tool assembly is driven to be folded upwards, the height of the spray rod is lifted, the left nut 35 can be pressed down to lift when moving to the leftmost end, the travel switch is stopped, and the spray rod is folded.

The concave integrated spray rod consists of a concave rod piece 57, a spray head 58 and the like, and a transfusion pipeline is arranged at the position. The transfusion pipeline comprises a reducing liquid-separating tee 60, an inner spray head branch pipe 61 and an outer spray head branch pipe 62.

The width of the concave part of the concave rod piece is larger than the width of the multi-stage parallelogram telescopic connecting rod when the telescopic connecting rod is completely contracted, and the width of the concave part of the concave rod piece is based on the principle that the unmanned aerial vehicle does not influence the landing and take-off of the unmanned aerial vehicle after the spraying lifting appliance is completely contracted.

The spray heads are distributed at the non-concave ends of the concave rod pieces. And the left and right infusion pipelines of the concave spray rod are respectively connected with the spray head through a reducing and shunting tee 60 and

branch pipes

61 and 62.

A spout medicine hoist subassembly for plant protection unmanned aerial vehicle, its liquid way system connection condition is as follows: the upper part interface of the telescopic spiral spring tube 59 is sleeved on the quick-connection plug 26, the lower part interface is sleeved on the variable diameter liquid-dividing three-way 60, one outlet of the two outlets of the variable diameter liquid-dividing three-way 60 is connected to the inner spray head through the inner spray head branch tube 61, and the other outlet is connected to the outer spray head through the outer spray head branch tube 62, so that the connection of liquid paths is completed.

A a left and right magnetism that is used for plant protection unmanned aerial vehicle spouts medicine hoist subassembly accessible main connecting plate 18 and the quick connector 26 buckle of liquid outlet hang and adorn on plant protection unmanned aerial vehicle's dropout main hanger subassembly to can meet the initiative dropout when hindering in the operation, make unmanned aerial vehicle return to the journey safely. The method comprises the following specific steps: after the unmanned aerial vehicle takes off, the positive and negative tooth screw driving assembly drives the multi-stage parallelogram connecting rod to expand downwards and rotates the spray rod to be vertical to the undercarriage; when the flight meets the resistance, the pesticide spraying lifting appliance falls off from the tripping main hanging frame, the unmanned aerial vehicle safely navigates back and lands, and the pesticide spraying lifting appliance is recovered, overhauled and reinstalled and then carries out the take-off operation again; after the operation is finished, the spray rod rotates to be parallel to the undercarriage, the multi-stage parallelogram connecting rod is driven by the positive and negative tooth screw driving assembly to contract upwards, the pesticide spraying lifting appliance is retracted below the belly and above the undercarriage, and the airplane lands. The operation flow is shown in fig. 8.

It should be noted that although the spraying spreader component is illustrated in fig. 8, the flow is not limited thereto, and the flow is also applicable to other spreader components.

Example 2

The embodiment provides a spout medicine hoist subassembly for plant protection unmanned aerial vehicle, basically with embodiment 1, the difference lies in:

the driving screw components of the positive and negative teeth of the pesticide spraying lifting appliance component are replaced by a 90-degree steering servo motor, and the multistage parallelogram connecting rod is pushed to expand downwards or contract upwards.

Example 3

the concave integrated spray rod is perpendicular to the undercarriage, is folded and then clings to the lower part of the undercarriage, and does not turn when the multi-stage parallelogram connecting rod of the pesticide spraying hanger is contracted or expanded.

Example 4

The embodiment provides a spout medicine hoist subassembly for plant protection unmanned aerial vehicle, basically with embodiment 2, the difference lies in:

Example 5

This example differs from examples 1-4 in that:

the multi-level parallelogram connecting rod is of a 1-level parallelogram connecting rod structure.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The term "coupled" as used herein may be either a direct connection or an indirect connection, i.e., an element may be coupled to a connected element via another element.

The foregoing embodiments are merely illustrative of the present invention, and various components and devices of the embodiments may be changed or eliminated as desired, not all components shown in the drawings are necessarily required, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, and all equivalent changes and modifications based on the technical solutions of the present invention should not be excluded from the scope of the present invention.

Claims

1. A lifting appliance component is characterized by comprising a main connecting plate, a magnetic suction disc, a quick-connection connector and a spraying rod, wherein,

2. The spreader assembly according to claim 1, further comprising a telescopic device and a flexible fluid line, wherein the spray bar is connected to the main connection plate through the telescopic device, and the quick connector is communicated with the nozzle on the spray bar through the flexible fluid line.

3. The spreader assembly according to claim 2, wherein the telescopic device comprises a telescopic driving device and a telescopic rod, and the telescopic driving device drives the telescopic rod to extend and retract up and down.

4. The spreader assembly according to claim 3, wherein the telescopic drive is an electric screw-nut drive or a steering servo motor.

5. A spreader assembly according to claim 3 or 4, wherein the telescopic rod is a multi-joint combined telescopic rod structure or a parallelogram telescopic link structure.

6. The lifting appliance component according to claim 5, wherein the electric screw and nut transmission mechanism comprises a steering engine or a motor, a coupler, a positive and negative tooth driving screw, a guide rod, a driving slider nut-left-handed rotation and a driving slider nut-right-handed rotation, the steering engine is connected with the positive and negative tooth driving screw through the coupler, the positive and negative tooth driving screw drives the driving slider nut-left-handed rotation and the driving slider nut-right-handed rotation which are sleeved on the positive and negative tooth driving screw to respectively move in opposite directions along the guide of the guide rod, the guide rod is fixedly connected with the main connecting plate, and the driving slider nut-left-handed rotation and the driving slider nut-right-handed rotation are respectively connected with the telescopic rods at two sides of the parallelogram telescopic connecting rod.

7. The spreader assembly according to claim 6, wherein the electric screw nut transmission mechanism further comprises a bearing seat beam, a front and back tooth driving screw end sliding bearing and a middle sliding bearing, the bearing seat beam is connected with the main connecting plate, the guide rod is fixedly connected with the bearing seat beam, the front and back tooth driving screw end sliding bearing is arranged at two ends of the front and back tooth driving screw, the middle sliding bearing is arranged at the middle part of the front and back tooth driving screw, and the front and back tooth driving screw end sliding bearing and the middle sliding bearing are both supported by the bearing seat beam.

8. The spreader assembly according to claim 6, wherein the parallelogram pantograph linkage is of one-stage or multi-stage construction.

9. The spreader assembly according to claim 6 or 7, wherein the electric screw nut transmission further comprises a travel switch, and the travel switch is provided at the end of the left-hand or right-hand travel of the driving slider nut.

10. The spreader assembly according to claim 5, wherein a steering servo motor is provided at the lower end of the telescopic rod, the steering servo motor being connected to the spray bar to drive the spray bar to steer.

11. A spreader assembly according to any one of claims 1 to 4 or 6 to 8 or 10, wherein the spray bars are provided with a concave portion through which the spray bars are connected to the main connection plate, and the nozzles are provided on a non-concave portion.

12. The spreader assembly according to any one of claims 2 to 4 or 6 to 8 or 10, wherein the flexible infusion line comprises a telescopic helical spring tube, the telescopic helical spring tube is arranged in parallel with the telescopic device, the upper end of the telescopic helical spring tube is connected with the quick connector, and the lower end of the telescopic helical spring tube is connected with the nozzle.