A trailer for comprehensive operation of plant protection UAV

Abstract

The present invention relates to the technical field of drone landing and take-off platforms, specifically a trailer for integrated plant protection drone operations, including a trailer platform, a landing and take-off platform fixedly provided on the upper surface of the trailer platform, an injection tube for conveying medicine provided above the trailer platform and located in front of the landing and take-off platform, two left and right parallel clamps slidably connected to the upper surface of the landing and take-off platform, baffles slidably connected to the opposite side walls of the two clamps, a transmission cavity provided on the lower surface of the landing and take-off platform, a driving mechanism provided on the upper surface of the trailer platform and located below the transmission cavity, the driving mechanism drives the two baffles to move toward each other while driving the injection tube to move backward until the injection tube is inserted into the medicine box of the plant protection drone. The present invention provides driving force through the driving mechanism so that the two clamps can automatically connect the injection tube and the medicine box in the process of automatically centering and clamping the landing gear of the plant protection drone, thereby realizing automatic dosing, simple structure, and efficient operation.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicle (UAV) take-off and landing platforms, and in particular to a trailer used for comprehensive operations of plant protection UAVs. Background Art

[0002] Plant protection UAVs have been widely used in agricultural and forestry plant protection operations. Plant protection UAVs consist of three parts: a flight platform, GPS flight control, and a spraying mechanism. Spraying operations are achieved through ground remote control or GPS flight control. They can spray pesticides, seeds, powders, etc.

[0003] A Chinese patent with publication number CN106043086B discloses a trailer for integrated plant protection UAV operations and a method for positioning and recovering UAVs. The trailer lacks a device that can automatically connect the medicine box of the UAV with the medicine box in the trailer, and the operator needs to manually connect them, which is cumbersome to operate. Summary of the invention

[0004] The purpose of the present invention is to provide a trailer for comprehensive operations of plant protection UAVs to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a trailer for integrated operation of plant protection UAV, comprising a trailer platform, a take-off and landing platform is fixedly arranged on the upper surface of the trailer platform, an injection tube for conveying medicine is arranged above the trailer platform and in front of the take-off and landing platform, two left and right parallel clamps are slidably connected to the upper surface of the take-off and landing platform, baffles are slidably connected to the opposite side walls of the two clamps, a transmission cavity is opened on the lower surface of the take-off and landing platform, the front end of the transmission cavity passes through the front side wall of the take-off and landing platform, a driving mechanism is arranged on the upper surface of the trailer platform and below the transmission cavity, and the driving mechanism drives the two baffles to move toward each other and drives the injection tube to move backwards until the injection tube is inserted into the medicine box of the plant protection UAV;

[0006] The driving mechanism includes a servo motor, an output end of the servo motor is coaxially fixedly connected with a forward screw, the forward screw is rotatably connected with a first screw nut, and the forward screw is coaxially fixedly connected with a reverse screw, the reverse screw is rotatably connected with a second screw nut and a third screw nut, the outer wall of the first screw nut is fixedly sleeved with a first movable cylinder, the outer wall of the second screw nut is fixedly sleeved with a second movable cylinder, the outer wall of the third screw nut is fixedly sleeved with a third movable cylinder, the first movable cylinder, the second movable cylinder and the third movable cylinder are all square tube structures, the outer wall of the first movable cylinder is slidably sleeved with the inner wall of the second movable cylinder, the upper surface of the trailer platform is fixedly provided with a guide rail, the second movable cylinder and the third movable cylinder are respectively slidably connected to the guide rail along the front-rear direction.

[0007] Optionally, a medicine storage box and a delivery pump are fixedly installed on the upper surface of the trailer platform in sequence along the front-to-back direction. The output end of the medicine storage box is fixedly connected to the inlet end of the delivery pump through a pipeline. The outlet end of the delivery pump is connected to a hose. The end of the hose away from the delivery pump is fixedly connected to the front end of the injection tube.

[0008] Optionally, two sliders penetrating the upper surface of the lifting and lowering platform are fixedly provided on the lower surface of the clamping plate, and the left and right ends of the first movable cylinder are hinged with two connecting rods arranged along the front-to-back direction, and the ends of the two connecting rods away from the first movable cylinder are respectively hinged with the two sliders.

[0009] Optionally, a linear sliding hole matched with the sliding block is provided on the upper surface of the lifting and lowering platform, and the distance between two adjacent linear sliding holes on the left and right gradually decreases from front to back.

[0010] Optionally, a circular depression is provided on the upper surface of the lifting and lowering platform, the linear sliding hole is located in the circular depression, a rectangular through hole penetrating the circular depression is provided above the second movable cylinder, a rigid rope is fixed between the second movable cylinder and the baffle, and the rigid rope passes through the rectangular through hole.

[0011] Optionally, a bracket is fixedly connected to the upper surface of the third movable cylinder, the rear end of the injection tube is fixedly penetrated through the bracket, an injection port is opened on the lower surface of the injection tube, and an inlet tube compatible with the injection tube is fixedly penetrated through the front side wall of the medicine box.

[0012] Optionally, an outlet compatible with the injection port is provided on the lower surface of the inlet tube and located in the medicine box, a spring is fixedly provided on the rear inner wall of the inlet tube, and a sealing plug is fixedly provided on the front end of the spring and is slidably connected to the inner wall of the inlet tube. When the spring is in a natural state, the sealing plug blocks the outlet.

[0013] Optionally, a notch is provided on the lower surface of the injection tube and located at the rear side of the injection port, an ultrasonic liquid level sensor is fixed in the notch, and a detection port compatible with the ultrasonic liquid level sensor is provided on the lower surface of the inlet tube and located at the rear side of the outlet.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides driving force through a driving mechanism so that the two clamping plates can automatically connect the injection tube and the medicine box in the process of automatically centering and clamping the landing gear of the plant protection UAV, thereby realizing automatic medicine addition, having a simple structure and efficient operation;

[0016] 2. The present invention can realize the intermittent linear movement of the baffle forward. Even if the rear end of the landing gear is close to the baffle at the beginning, the baffle will not immediately push the landing gear forward after the driving mechanism is started, which is conducive to the two clamping plates to clamp and push the landing gear first, so that the plant protection UAV is convenient to be located in the center of the trailer platform;

[0017] 3. The present invention provides driving force through a driving mechanism, so that the injection tube is automatically connected to the medicine box to achieve automatic drug addition. The ultrasonic liquid level sensor can accurately measure the liquid level in the medicine box to improve the accuracy of automatic drug addition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention;

[0019] Figure 2 This is a top view of the present invention without the installation of the bracket, injection tube, medicine storage box and delivery pump;

[0020] Figure 3 It is a partial cross-sectional view of the take-off and landing platform and the driving mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the clamping plate, baffle, slider and connecting rod in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the guide rail, the third moving cylinder, the bracket and the injection tube in the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the injection tube and the medicine box in the present invention.

[0024] In the figure: 1. trailer platform; 2. lifting and lowering platform; 3. injection tube; 4. splint; 5. baffle; 6. transmission chamber; 7. driving mechanism; 701. servo motor; 702. forward screw; 703. first screw nut; 704. reverse screw; 705. second screw nut; 706. third screw nut; 707. first moving cylinder; 708. second moving cylinder; 709. third moving cylinder; 710. guide rail; 711. slider; 712. connecting rod; 713. linear slide hole; 714. rigid rope; 8. medicine storage box; 9. delivery pump; 10. hose; 11. circular depression; 12. rectangular through hole; 13. bracket; 14. injection port; 15. notch; 16. ultrasonic liquid level sensor; 17. medicine box; 18. inlet pipe; 19. outlet; 20. detection port; 21. spring; 22. sealing plug. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example: See Figure 1 and Figure 2 The present invention provides a trailer for comprehensive operations of plant protection UAVs, including a trailer platform 1, a take-off and landing platform 2 is fixedly provided on the upper surface of the trailer platform 1, an injection tube 3 for conveying medicine is provided above the trailer platform 1 and in front of the take-off and landing platform 2, two left and right parallel clamps 4 are slidably connected to the upper surface of the take-off and landing platform 2, and baffles 5 are slidably connected to the opposite side walls of the two clamps 4, a transmission cavity 6 is opened on the lower surface of the take-off and landing platform 2, and the front end of the transmission cavity 6 passes through the front side wall of the take-off and landing platform 2, and a driving mechanism 7 is provided on the upper surface of the trailer platform 1 and below the transmission cavity 6, and the driving mechanism 7 drives the two baffles 5 to move toward each other, and at the same time drives the injection tube 3 to move backward until the injection tube 3 is inserted into the medicine box 17 of the plant protection UAV.

[0027] In addition to the above embodiment, in this embodiment, a medicine storage box 8 and a delivery pump 9 are fixedly arranged on the upper surface of the trailer platform 1 in the front-to-back direction, the output end of the medicine storage box 8 is fixedly connected to the inlet end of the delivery pump 9 through a pipeline, the outlet end of the delivery pump 9 is connected to a hose 10, and the end of the hose 10 away from the delivery pump 9 is fixedly connected to the front end of the injection tube 3. Medicines are stored in the medicine storage box 8, and the delivery pump 9 delivers the medicines in the medicine storage box 8 to the injection tube 3, and is connected to the medicine box 17 through the injection tube 3, so that the medicine box 17 can automatically add medicine.

[0028] See also Figures 2 to 4 In the above embodiment, the driving mechanism 7 in this embodiment includes a servo motor 701, the output end of the servo motor 701 is coaxially fixedly connected with a forward screw 702, the forward screw 702 is rotatably connected with a first screw nut 703, and the forward screw 702 is coaxially fixedly connected with a reverse screw 704, and the screw threads of the forward screw 702 and the reverse screw 704 are in opposite directions. The reverse screw 704 is rotatably connected with a second screw nut 705 and a third screw nut 706, the outer wall of the first screw nut 703 is fixedly sleeved with a first moving cylinder 707, the outer wall of the second screw nut 705 is fixedly sleeved with a second moving cylinder 708, and the outer wall of the third screw nut 706 is fixedly sleeved with a third moving cylinder 709.

[0029] The first movable cylinder 707, the second movable cylinder 708 and the third movable cylinder 709 are all square tube structures. The outer wall of the first movable cylinder 707 is slidably sleeved with the inner wall of the second movable cylinder 708. A guide rail 710 is fixedly provided on the upper surface of the trailer platform 1. The second movable cylinder 708 and the third movable cylinder 709 are respectively slidably connected with the guide rail 710 in the front-to-back direction. The guide rail 710 provides guidance and sliding support for the front-to-back linear movement of the second movable cylinder 708 and the third movable cylinder 709. The second movable cylinder 708 provides guidance and sliding support for the front-to-back linear movement of the first movable cylinder 707. The first movable cylinder 707, the second movable cylinder 708 and the third movable cylinder 709 run smoothly and stably.

[0030] See also Figure 2 and Figure 4 In addition to the above embodiment, two sliders 711 penetrating the upper surface of the lifting and landing platform 2 are fixedly provided on the lower surface of the clamping plate 4 in this embodiment. Two connecting rods 712 arranged in the front-to-back direction are hingedly provided at both left and right ends of the first movable cylinder 707. The ends of the two connecting rods 712 away from the first movable cylinder 707 are respectively hingedly provided with the two sliders 711. A linear sliding hole 713 matching the slider 711 is provided on the upper surface of the lifting and landing platform 2. The spacing between the two adjacent linear sliding holes 713 on the left and right gradually decreases from front to back. A circular depression 11 is provided on the upper surface of the lifting and landing platform 2. The linear sliding hole 713 is located in the circular depression 11. A rectangular through hole 12 penetrating the circular depression 11 is provided above the second movable cylinder 708. A rigid rope 714 is fixedly provided between the second movable cylinder 708 and the baffle 5. The rigid rope 714 penetrates the rectangular through hole 12.

[0031] The present invention provides driving force through the driving mechanism 7 so that the two clamps 4 can automatically connect the injection tube 3 and the medicine box 17 in the process of automatically centering and clamping the landing gear of the plant protection UAV, so as to realize automatic drug addition, with simple structure and efficient operation. The present invention constrains the moving direction of the slider 711 through the linear slide hole 713, so that the second movable cylinder 708 can realize the centering and rearward movement of the two clamps 4 through the connecting rod 712. As the two clamps 4 approach each other, the rigid rope 714 can be switched from a tensioned state to a relaxed state. Under the driving force provided by the driving mechanism 7, when the rigid rope 714 is in a tensioned state, the rigid rope 714 can pull the baffle 5 to move forward. When the rigid rope 714 is in a relaxed state, the rigid rope 714 will not pull the baffle 5 to move forward. Therefore, the present invention realizes intermittent linear movement of the baffle plate 5 forward. Even if the rear end of the landing gear is close to the baffle plate 5 at the beginning, the baffle plate 5 will not immediately push the landing gear forward after the driving mechanism 7 is started, so as to prevent the baffle plate 5 from pushing the landing gear crooked when the splint 4 just starts to run. This is beneficial for the two splints 4 to clamp and push the landing gear first, so that the plant protection UAV is convenient to be located in the center of the trailer platform 1.

[0032] See also Figure 5 and Figure 6In addition to the above embodiment, in this embodiment, the upper surface of the third movable cylinder 709 is fixedly connected with a bracket 13, the rear end of the injection tube 3 is fixedly penetrated through the bracket 13, the lower surface of the injection tube 3 is provided with an injection port 14, and the front side wall of the medicine box 17 is fixedly penetrated with an inlet tube 18 that matches the injection tube 3. An outlet 19 that matches the injection port 14 is provided on the lower surface of the inlet tube 18 and is located in the medicine box 17, and a spring 21 is fixedly provided on the inner wall of the rear side of the inlet tube 18, and a sealing plug 22 that is slidably connected to the inner wall of the inlet tube 18 is fixedly provided at the front end of the spring 21. When the spring 21 is in a natural state, the sealing plug 22 blocks the outlet 19. A notch 15 is provided at the rear end of the injection tube 3 and at the rear side of the injection port 14, and an ultrasonic liquid level sensor 16 is fixed in the notch 15. A detection port 20 compatible with the ultrasonic liquid level sensor 16 is provided on the lower surface of the inlet tube 18 and at the rear side of the outlet 19. The ultrasonic liquid level sensor 16 can provide the operator with the liquid level data in the medicine box 17.

[0033] The present invention provides elastic support through the spring 21, and the sealing plug 22 can block the outlet 19 to prevent leakage of the inlet pipe 18 under complex flight actions of the plant protection UAV, and provides driving force through the driving mechanism 7, so that the injection tube 3 is automatically connected to the medicine box 17 to realize automatic dosing. With the help of the ultrasonic liquid level sensor 16, the liquid level in the medicine box 17 can be accurately measured to improve the accuracy of automatic dosing.

[0034] In addition, since the baffle 5 moves forward intermittently in a straight line, the process of the baffle 5 pushing the landing gear forward is intermittent, so the shaking of the liquid level in the medicine box 17 as the landing gear moves is small, which is conducive to the ultrasonic liquid level sensor 16 to quickly measure the liquid level.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trailer for integrated plant protection UAV operations, comprising a trailer platform (1), a take-off and landing platform (2) being fixedly provided on the upper surface of the trailer platform (1), characterized in that: An injection tube (3) for conveying medicine is provided above the trailer platform (1) and located in front of the lifting and landing platform (2); two clamping plates (4) arranged in parallel on the left and right are slidably connected to the upper surface of the lifting and landing platform (2); baffles (5) are slidably connected to the opposite side walls of the two clamping plates (4); a transmission cavity (6) is provided on the lower surface of the lifting and landing platform (2); the front end of the transmission cavity (6) passes through the front side wall of the lifting and landing platform (2); a driving mechanism (7) is provided on the upper surface of the trailer platform (1) and located below the transmission cavity (6); the driving mechanism (7) drives the two baffles (5) to move toward each other and drives the injection tube (3) to move backwards until the injection tube (3) is inserted into the medicine box (17) of the plant protection drone; The driving mechanism (7) comprises a servo motor (701), the output end of the servo motor (701) is coaxially fixedly connected to a forward screw (702), the forward screw (702) is rotatably connected to a first screw nut (703), and the forward screw (702) is coaxially fixedly connected to a reverse screw (704), the reverse screw (704) is rotatably connected to a second screw nut (705) and a third screw nut (706), the outer wall of the first screw nut (703) is fixedly sleeved with a first moving cylinder (707), and the outer wall of the second screw nut (705) is fixedly sleeved with a first moving cylinder (707). A second movable cylinder (708) is fixedly sleeved on the outer wall, and a third movable cylinder (709) is fixedly sleeved on the outer wall of the third screw nut (706). The first movable cylinder (707), the second movable cylinder (708) and the third movable cylinder (709) are all square tube structures. The outer wall of the first movable cylinder (707) is slidably sleeved with the inner wall of the second movable cylinder (708). A guide rail (710) is fixedly provided on the upper surface of the trailer platform (1), and the second movable cylinder (708) and the third movable cylinder (709) are respectively slidably connected to the guide rail (710) along the front-rear direction.

2. A trailer for integrated plant protection UAV operations according to claim 1, characterized in that: A medicine storage box (8) and a delivery pump (9) are fixedly arranged on the upper surface of the trailer platform (1) in sequence along the front-to-back direction; the output end of the medicine storage box (8) is fixedly connected to the inlet end of the delivery pump (9) through a pipeline; the outlet end of the delivery pump (9) is connected to a hose (10); the end of the hose (10) away from the delivery pump (9) is fixedly connected to the front end of the injection tube (3).

3. The trailer for integrated plant protection UAV operation according to claim 1 is characterized by: Two sliders (711) penetrating the upper surface of the lifting and lowering platform (2) are fixedly provided on the lower surface of the clamping plate (4); the left and right ends of the first movable cylinder (707) are hinged with two connecting rods (712) arranged in the front-rear direction; the ends of the two connecting rods (712) away from the first movable cylinder (707) are respectively hinged with the two sliders (711).

4. The trailer for integrated plant protection UAV operation according to claim 3 is characterized by: The upper surface of the lifting and lowering platform (2) is provided with a linear sliding hole (713) adapted to the sliding block (711), and the distance between two adjacent linear sliding holes (713) on the left and right gradually decreases from front to back.

5. The trailer for integrated plant protection UAV operation according to claim 4 is characterized by: A circular depression (11) is provided on the upper surface of the lifting and lowering platform (2), the linear sliding hole (713) is located in the circular depression (11), a rectangular through hole (12) penetrating the circular depression (11) is provided above the second movable cylinder (708), a rigid rope (714) is fixed between the second movable cylinder (708) and the baffle (5), and the rigid rope (714) penetrates the rectangular through hole (12).

6. The trailer for integrated plant protection UAV operation according to claim 1, characterized in that: The upper surface of the third movable cylinder (709) is fixedly connected to a bracket (13), the rear end of the injection tube (3) is fixedly passed through the bracket (13), the lower surface of the injection tube (3) is provided with an injection port (14), and the front side wall of the medicine box (17) is fixedly passed through with an inlet pipe (18) compatible with the injection tube (3).

7. The trailer for integrated plant protection UAV operation according to claim 6, characterized in that: An outlet (19) adapted to the injection port (14) is provided on the lower surface of the inlet pipe (18) and located in the medicine box (17); a spring (21) is fixedly provided on the inner wall of the rear side of the inlet pipe (18); a sealing plug (22) slidably connected to the inner wall of the inlet pipe (18) is fixedly provided at the front end of the spring (21); when the spring (21) is in a natural state, the sealing plug (22) blocks the outlet (19).

8. The trailer for integrated plant protection UAV operation according to claim 7, characterized in that: A notch (15) is provided on the lower surface of the injection tube (3) and located behind the injection port (14), an ultrasonic liquid level sensor (16) is fixedly provided in the notch (15), and a detection port (20) adapted to the ultrasonic liquid level sensor (16) is provided on the lower surface of the inlet tube (18) and located behind the outlet (19).

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