Crawler-type pesticide sprayer

Abstract

The invention provides a crawler-type pesticide sprayer, and relates to the technical field of pesticide sprayers, the crawler-type pesticide sprayer comprises a frame, driving crawlers are mounted on two sides of the bottom of the frame, a pesticide box is fixed on the top of the front end of the frame, a fan is mounted at the rear end of the frame, and two groups of nozzle assemblies are arranged on the periphery of the fan up and down; the spraying head assembly comprises a fixed spraying head, middle spraying heads are arranged on the two sides of the fixed spraying head, side spraying heads are arranged on the outer sides of the middle spraying heads, and the fixed spraying head, the middle spraying heads and the side spraying heads are in sliding contact with the surface of the draught fan. According to the pesticide spraying device, the positions and angles of the nozzles on the periphery of the fan can be adjusted, so that conventional surrounding type spraying and targeted spraying towards the air and the ground can be achieved, the applicability of the device is improved, adjustment is convenient, specific adjustment can be made according to crops to be sprayed, waste of pesticide liquid is avoided, and the pesticide spraying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide sprayers, in particular to a crawler-type pesticide sprayer. Background Art

[0002] A pesticide sprayer is an agricultural machine that disperses liquids and is a type of agricultural pesticide application machine. The diameter of the fog particles produced by the air-transported fog machine is very small. As we all know, the smaller the pesticide fog particles, the better the prevention and control effect. Various experiments have shown that the smoke can penetrate into every hole and can kill pests in dense tree crowns and even in the gaps of bark. The smaller the smoke particle size, the more fog particles there are. Experiments have shown that the more fog particles there are per unit area, the better the prevention and control effect. A large number of fog particles diffuse in the space and are evenly distributed, which greatly increases the chance of contact with pathogens and pests, and is conducive to improving the prevention and control effect. This advantage is extremely significant when preventing and controlling indoors (sheds). The crawler-type pesticide sprayer of the prior art can be used for movement on uneven ground. Some intelligent pesticide sprayers with their own control systems do not require active human driving. Usually, the dispersion of the liquid medicine is achieved by the cooperation of the fan and the nozzle at the rear end of the pesticide sprayer.

[0003] However, in the prior art, due to the different objects of pesticide spraying, such as crops on the ground, fruit trees or higher grape racks, the positions of the fruits of these different objects are different, distributed on the ground, above the ground and in the air. Therefore, when facing different objects, the conventional surround fan spraying method will cause more liquid medicine to be unable to contact the crops in the first time, resulting in waste of liquid medicine and affecting the progress of pesticide spraying. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a crawler sprayer to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. Through the cooperation of the drive component, the transmission component and the fan, the position and angle of the fan's peripheral nozzle can be adjusted, so as to achieve conventional surround spraying and targeted spraying toward the air and the ground, thereby improving the applicability of the device and being easy to adjust. Specific adjustments can be made for the crops to be sprayed, thereby avoiding waste of liquid medicine and improving spraying efficiency.

[0005] In order to achieve the above-mentioned object, the present invention is implemented through the following technical scheme: a crawler-type pesticide sprayer, comprising a frame, driving crawlers are installed on both sides of the bottom of the frame, a medicine box is fixed on the top of the front end of the frame, and a fan is installed on the rear end of the frame, a nozzle assembly is arranged on the periphery of the fan, and the nozzle assembly is provided with two groups up and down, and the nozzle assembly includes a fixed nozzle, middle nozzles are arranged on both sides of the fixed nozzle, and side nozzles are arranged on the outside of the middle nozzle, the fixed nozzle, the middle nozzle and the side nozzles are all in sliding contact with the surface of the fan, and the fixed nozzle, the middle nozzle and the side nozzle are all in sliding contact with the surface of the fan, and the fixed nozzle, the middle nozzle and the side nozzle are all in sliding contact with the surface of the fan. A belt is fixed between the nozzle and the side nozzles, and a driving assembly is provided on both sides of the air outlet of the fan, and the driving assembly includes a vertical frame, and the bottom and the bottom of the vertical frame are both slidably connected with moving blocks, and a horizontal plate is fixed between the moving blocks of the same horizontal line of the two groups of vertical frames, and the fixed nozzle is fixed at the middle bottom of the horizontal plate, and a transmission assembly is provided on both sides of the rear end of the frame, and the transmission assembly includes a second tooth plate, one side of the second tooth plate is meshedly connected with a second gear, and a socket is fixed on the top of the second gear, and a connecting shaft passes through the bottom of the vertical frame, and the connecting shaft can be plugged into the socket.

[0006] Furthermore, the frame is fixed with mounting frames on both sides of the fan, and the fan is rotatably mounted on the mounting frames through bearings. A motor is fixed to the outer end of the mounting frame on one side of the fan, and the output end of the motor is fixedly connected to the fan.

[0007] Furthermore, a turntable is fixed on the output end of the motor, and a first electric push rod is fixed on the surface of the turntable, and an extended end of the first electric push rod is fixedly connected to the outer surface of the vertical frame.

[0008] Furthermore, the driving assembly also includes a bidirectional screw, which is rotatably installed inside the vertical frame through a bearing, and the moving block is threadedly sleeved on the surface of the bidirectional screw, and the connecting shaft is fixedly connected to the bottom of the bidirectional screw.

[0009] Furthermore, a connecting frame is fixed in the middle position of the vertical frame, and a first gear is rotatably installed on the opposite surfaces of the top and bottom of the connecting frame. First tooth plates are meshingly connected on both sides of the first gear, and the first tooth plates are respectively fixedly connected to the side nozzles and the moving block. A moving groove is opened on the surface of the horizontal plate at a position corresponding to the first tooth plate, and the upper and lower groups of first tooth plates of the vertical frame are staggered.

[0010] Furthermore, the transmission assembly also includes a storage cavity, a storage cavity is provided at the bottom of the vertical frame of the frame, and the connecting shaft is received inside the storage cavity, and a second electric push rod is fixed to the side of the second tooth plate of the frame, and the extended end of the second electric push rod is fixedly connected to the second tooth plate.

[0011] Furthermore, a slide groove is provided at the bottom of the second tooth plate, and a slide seat is slidably connected inside the slide groove. The bottom of the second gear is rotatably mounted on the top of the slide seat through a bearing, and a second spring is fixed between the inner wall of the slide groove and the slide seat.

[0012] Furthermore, the nozzle assembly also includes a first spring, the top of the middle nozzle is fixed with the first spring, and the other end of the first spring is fixedly connected to the cross plate.

[0013] Furthermore, a rotating shaft is installed on the surface of the fixed nozzle, the middle nozzle and the side nozzle, and the angles of the fixed nozzle, the middle nozzle and the side nozzle are adjusted by the rotating shaft.

[0014] Furthermore, a hose is fixed to one end of the fixed nozzle, the middle nozzle and the side nozzle facing the medicine box, and the hose is fixedly connected to the medicine outlet end of the medicine box.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention drives the lifting and lowering movement of the side nozzles by the plug plate to realize the wrapping of five groups of nozzles along the periphery of the fan to form a surround spraying mode. The angle of each nozzle can also be adjusted by rotating the rotating shaft to adapt it to different use environments. For example, the nozzle can be in the same direction as the fan at an angle toward the ground or toward the air. When the surround mode is adopted, the nozzle is rotated 90 degrees to face the surroundings, and the fan is used to blow the liquid medicine to the surroundings.

[0017] 2. When the vertical frame is pushed outward by the first electric push rod of the present invention, the vertical frame will drive each group of nozzles to move out of the fan housing. Before the connecting shaft is plugged into the socket, the plug is disengaged from the contact with the fan housing, and the angle of the nozzle can be adjusted individually to face outward, thereby forming a surround-type spraying mode. When the connecting shaft is inserted into the socket, as the vertical frame continues to move, the second gear slides along the slide groove through the slide seat to engage with the second tooth plate, thereby driving the connecting shaft and the two-way screw to rotate, so that the upper and lower groups of horizontal plates and nozzle assemblies of the vertical frame are close to each other to form two rows of linear nozzles. The nozzles in this state are suitable for regular ground spraying or grape racks. In the process of the vertical frame rotating with the fan, the second electric push rod drives the second tooth plate and the second gear to move to avoid movement interference with the vertical frame.

[0018] 3. In the present invention, when the bidirectional screw is rotated, the two groups of moving blocks and the horizontal plate are close to each other. At this time, the first tooth plate on one side of the moving block is meshed with the first gear, driving the first tooth plate on one side of the plug plate to move opposite to the moving block. When the two moving blocks in the same vertical frame are close to the middle position, the plug plate drives the side nozzles to be close to the position of the horizontal plate, keeping the side nozzles, the middle nozzles and the fixed nozzles in the same straight line to form a linear spray rack. Because the first gear and the first tooth plate in the same vertical frame are staggered, no interference occurs during movement.

[0019] 4. The present invention can drive the fan to rotate and adjust the angle through the motor, and cooperate with the adjustment of the angle of the nozzle assembly so that the spraying direction of the liquid medicine can be adjusted according to needs.

[0020] 5. Compared with the prior art, the present invention can adjust the position and angle of the fan's peripheral nozzles through the cooperation of the drive assembly, the transmission assembly and the fan, thereby realizing conventional surround spraying and targeted spraying toward the air and the ground, improving the applicability of the device, and is easy to adjust. Specific adjustments can be made for the crops being sprayed, avoiding waste of liquid medicine and improving spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a crawler-type pesticide sprayer of the present invention;

[0022] Figure 2 It is a schematic diagram of the rear end structure of a frame of a crawler-type pesticide sprayer of the present invention;

[0023] Figure 3 It is a schematic structural diagram of a spray head assembly of a crawler-type pesticide sprayer of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of a vertical frame of a crawler-type pesticide sprayer of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection between the driving assembly and the side spray head of a crawler-type pesticide sprayer of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of a driving assembly of a crawler-type pesticide sprayer of the present invention;

[0027] Figure 7 It is a schematic diagram of the bottom structure of a transmission assembly of a crawler-type pesticide sprayer of the present invention;

[0028] Figure 8 It is a schematic diagram of the top structure of a transmission assembly of a crawler-type pesticide sprayer of the present invention;

[0029] Fig. 9 The present invention is a schematic diagram of the connection between the spray head and the rotating shaft of a crawler-type pesticide sprayer.

[0030] In the figure: 1. frame; 11. driving crawler; 12. medicine box; 2. fan; 21. mounting frame; 22. motor; 23. turntable; 24. first electric push rod; 3. driving assembly; 31. vertical frame; 32. moving block; 33. bidirectional screw; 34. horizontal plate; 35. plug plate; 36. first gear; 37. first tooth plate; 38. connecting frame; 39. moving groove; 4. nozzle assembly; 41. fixed nozzle; 42. middle nozzle; 43. first spring; 44. side nozzle; 45. belt; 46. hose; 47. rotating shaft; 5. transmission assembly; 51. storage chamber; 52. connecting shaft; 53. second tooth plate; 54. slide groove; 55. second spring; 56. slide seat; 57. second gear; 58. socket; 59. second electric push rod. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] See also Figures 1 to 9 The present invention provides a technical solution: a crawler-type pesticide sprayer, comprising a frame 1, wherein driving crawlers 11 are installed on both sides of the bottom of the frame 1, a medicine box 12 is fixed on the top of the front end of the frame 1, and a fan 2 is installed on the rear end of the frame 1, and a nozzle assembly 4 is arranged on the periphery of the fan 2, and the nozzle assembly 4 is provided with two groups up and down, and the nozzle assembly 4 includes a fixed nozzle 41, and intermediate nozzles 42 are arranged on both sides of the fixed nozzle 41, and side nozzles 44 are arranged on the outside of the intermediate nozzle 42, and the fixed nozzle 41, the intermediate nozzle 42 and the side nozzle 44 are all in sliding contact with the surface of the fan 2, and belts 45 are fixed between the fixed nozzle 41, the intermediate nozzle 42 and the side nozzle 44, and driving assemblies 3 are arranged on both sides of the air outlet of the fan 2, and the driving assembly 3 includes a vertical frame 31, and the bottom and the bottom of the vertical frame 31 are both slidably connected with a moving block 3 2. A horizontal plate 34 is fixed between the moving blocks 32 of the same horizontal line of the two groups of vertical frames 31, and the fixed nozzle 41 is fixed at the middle bottom of the horizontal plate 34. Transmission components 5 are provided on both sides of the rear end of the frame 1. The transmission component 5 includes a second tooth plate 53, one side of the second tooth plate 53 is meshed and connected with a second gear 57, and a socket 58 is fixed on the top of the second gear 57. A connecting shaft 52 is passed through the bottom of the vertical frame 31, and the connecting shaft 52 can be plugged into the socket 58. When using the device, the movement of the driving crawler 11 is manually controlled, and the liquid medicine is sprayed around the crops by adjusting the angle of the nozzle assembly 4 and cooperating with the fan 2 to kill insects. The direction of the fan 2 and the nozzle assembly 4 is determined according to the position of the insecticide object, and the range and direction of the spraying can be adjusted by cooperating with the driving component 3 and the transmission component 5, so that the adjustment and use are more convenient.

[0033] In this embodiment, the frame 1 is fixed with mounting frames 21 on both sides of the fan 2, and the fan 2 is rotatably mounted on the mounting frames 21 on both sides through bearings. A motor 22 is fixed to the outer end of the mounting frame 21 on one side of the fan 2, and the output end of the motor 22 is fixedly connected to the fan 2. The motor 22 can drive the fan 2 to rotate and adjust the angle, and cooperate with the adjustment of the angle of the nozzle assembly 4, so that the spraying direction of the liquid medicine can be adjusted according to needs.

[0034] In this embodiment, the driving assembly 3 also includes a bidirectional screw 33, the bidirectional screw 33 is rotatably installed inside the vertical frame 31 through a bearing, and the moving block 32 is threadedly sleeved on the surface of the bidirectional screw 33, and the connecting shaft 52 is fixedly connected to the bottom of the bidirectional screw 33, and a connecting frame 38 is fixed in the middle position of the vertical frame 31, and a first gear 36 is rotatably installed on the opposite surfaces of the top and bottom of the connecting frame 38, and the first gear 36 is meshed and connected with the first tooth plate 37 on both sides, and the first tooth plate 37 is fixedly connected to the side nozzle 44 and the moving block 32 respectively, and a moving groove 39 is opened on the surface of the horizontal plate 34 corresponding to the first tooth plate 37. The upper and lower groups of first tooth plates 37 are staggered. When the bidirectional screw 33 rotates, the two groups of moving blocks 32 and the horizontal plate 34 approach each other. At this time, the first tooth plate 37 on one side of the moving block 32 meshes with the first gear 36, driving the first tooth plate 37 on one side of the plug plate 35 to move in the opposite direction to the moving block 32. When the two moving blocks 32 in the same vertical frame 31 are close to the middle position, the plug plate 35 drives the side spray head 44 to be close to the horizontal plate 34, keeping the side spray head 44, the middle spray head 42 and the fixed spray head 41 in the same straight line, forming a linear spray rack. Because the first gear 36 and the first tooth plate 37 in the same vertical frame 31 are staggered, no interference occurs during movement.

[0035] In this embodiment, a turntable 23 is fixed on the output end of the motor 22, and a first electric push rod 24 is fixed on the surface of the turntable 23, the extended end of the first electric push rod 24 is fixedly connected to the outer surface of the vertical frame 31, the transmission assembly 5 also includes a storage cavity 51, the frame 1 is provided with a storage cavity 51 at the bottom corresponding to the vertical frame 31, and the connecting shaft 52 is received in the storage cavity 51, the frame 1 is fixed with a second electric push rod 59 on the side of the second tooth plate 53, the extended end of the second electric push rod 59 is fixedly connected to the second tooth plate 53, the bottom of the second tooth plate 53 is provided with a slide groove 54, and the inside of the slide groove 54 is slidably connected with a slide seat 56, the bottom of the second gear 57 is rotatably mounted on the top of the slide seat 56 through a bearing, a second spring 55 is fixed between the inner wall of the slide groove 54 and the slide seat 56, the first electric push rod 24 pushes the vertical frame 31 When pushed outward, the vertical frame 31 will drive each group of nozzles to move out of the fan 2 housing. Before the connecting shaft 52 is plugged into the socket 58, the plug is disengaged from the fan 2 housing, and the angle of the nozzle can be adjusted individually to face outward, thereby forming a surround spraying method. When the connecting shaft 52 is inserted into the socket 58, as the vertical frame 31 continues to move, the second gear 57 slides along the slide groove 54 through the slide seat 56 to engage with the second tooth plate 53, thereby driving the connecting shaft 52 and the two-way screw 33 to rotate, so that the upper and lower groups of horizontal plates 34 of the vertical frame 31 and the nozzle assembly 4 are close to each other to form two rows of linear nozzles. The nozzles in this state are suitable for regular ground spraying or grape racks. In the process of the vertical frame 31 rotating with the fan 2, the second electric push rod 59 drives the second tooth plate 53 and the second gear 57 to move, so as to avoid movement interference with the vertical frame 31.

[0036] In this embodiment, the nozzle assembly 4 also includes a first spring 43, the top of the middle nozzle 42 is fixed with the first spring 43, and the other end of the first spring 43 is fixedly connected to the cross plate 34, the surfaces of the fixed nozzle 41, the middle nozzle 42 and the side nozzle 44 are all installed with a rotating shaft 47, and the fixed nozzle 41, the middle nozzle 42 and the side nozzle 44 are adjusted in angle by the rotating shaft 47, the fixed nozzle 41, the middle nozzle 42 and the side nozzle 44 are fixed with a hose 46 at one end facing the medicine box 12, and the hose 46 is fixedly connected to the medicine outlet end of the medicine box 12, each group of cross plates 34 has five groups of nozzles at the bottom, symmetrically arranged with the middle fixed nozzle 41, two groups of middle nozzles 42 are connected to the cross plate 34 through the first spring 43, each The nozzles are connected by elastic belts 45, and the lifting and lowering movement of the side nozzles 44 driven by the plug plate 35 can realize the wrapping of five groups of nozzles along the periphery of the fan 2 to form a surround spraying method. The angle of each nozzle can also be adjusted by rotating the rotating shaft 47 to adapt it to different usage environments. For example, toward the ground or toward the air, the nozzle can be in the same direction as the fan 2. When the surround type is adopted, the nozzle is rotated ninety degrees to face the surroundings, and the fan 2 is used to blow the liquid medicine to the surroundings. Each nozzle is connected to the medicine box 12 through a hose 46. The hose 46 needs to be reserved with sufficient length and limited by a cable clamp to keep the fan 2 and the nozzle When the angle is adjusted, the hose 46 can keep the nozzle connected to the medicine box 12.

[0037] When the device is used, the crawler 11 is driven to move by manual control, and the motor 22 can drive the fan 2 to rotate and adjust the angle, and cooperate with the adjustment of the angle of the nozzle assembly 4, so that the spraying direction of the liquid can be adjusted according to the needs. When the first electric push rod 24 pushes the vertical frame 31 outward, the vertical frame 31 will drive each group of nozzles to move out of the shell of the fan 2. Before the connecting shaft 52 is not plugged into the socket 58, the plug is separated from the contact with the shell of the fan 2, and the angle of the nozzle can be adjusted individually to face outward, thereby forming a surround spraying mode. When the connecting shaft 52 is inserted into the socket 58, as the vertical frame 31 continues to move, the second gear 57 slides along the slide groove 54 through the slide seat 56 to engage with the second tooth plate 53, thereby driving the connecting shaft 52 and the two-way screw 33 to rotate, so that the upper and lower groups of horizontal plates 34 of the vertical frame 31 and the nozzle assembly 4 are close to each other, forming two rows of linear nozzles. The nozzles in this state are suitable for regular ground spraying or grape racks. There are five groups of nozzles at the bottom of each group of horizontal plates 34, which are symmetrically arranged with the fixed nozzle 41 in the middle. The two groups of middle nozzles 42 are connected to the horizontal plate 34 by a first spring 43, and the nozzles are connected by an elastic belt 45. The lifting and lowering movement of the side nozzles 44 driven by the plug plate 35 can realize the wrapping of the five groups of nozzles along the periphery of the fan 2 to form a surround spraying method. The angle of each nozzle can also be adjusted by rotating the rotating shaft 47 to adapt it to different use environments, such as facing the ground or facing the air. The nozzle can be in the same direction as the fan 2. When the surround type is adopted, the nozzle is rotated ninety degrees to face the surroundings, and the fan 2 is used to blow the liquid medicine to the surroundings. The nozzles are connected to the medicine box 12 through a hose 46. The hose 46 needs to be reserved with sufficient length and limited by a cable clamp to keep the fan 2 and the nozzle When the angle is rotated to adjust the angle, the hose 46 can keep the nozzle connected to the medicine box 12, which is more convenient to adjust and use.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A crawler-type pesticide sprayer, comprising a frame (1), characterized in that: Drive tracks (11) are installed on both sides of the bottom of the frame (1), a medicine box (12) is fixed on the top of the front end of the frame (1), and a fan (2) is installed on the rear end of the frame (1). A nozzle assembly (4) is arranged on the periphery of the fan (2), and the nozzle assembly (4) is provided with two groups at the top and the bottom, and the nozzle assembly (4) includes a fixed nozzle (41), and intermediate nozzles (42) are arranged on both sides of the fixed nozzle (41), and side nozzles (44) are arranged on the outside of the intermediate nozzle (42). The fixed nozzle (41), the intermediate nozzle (42) and the side nozzle (44) are all in sliding contact with the surface of the fan (2), and belts (45) are fixed between the fixed nozzle (41), the intermediate nozzle (42) and the side nozzle (44). The fan (2) A driving assembly (3) is provided on both sides of the air outlet, the driving assembly (3) comprising a vertical frame (31), the bottom and the bottom of the vertical frame (31) are both slidably connected with a moving block (32), a horizontal plate (34) is fixed between the moving blocks (32) on the same horizontal line of two groups of vertical frames (31), and the fixed nozzle (41) is fixed at the middle bottom of the horizontal plate (34), and a transmission assembly (5) is provided on both sides of the rear end of the frame (1), the transmission assembly (5) comprises a second tooth plate (53), one side of the second tooth plate (53) is meshingly connected with a second gear (57), and a socket (58) is fixed on the top of the second gear (57), and a connecting shaft (52) passes through the bottom of the vertical frame (31), and the connecting shaft (52) can be plugged into the socket (58).

2. A crawler-type pesticide sprayer according to claim 1, characterized in that: The frame (1) is fixed with mounting frames (21) on both sides of the fan (2); the two sides of the fan (2) are rotatably mounted on the mounting frames (21) via bearings; a motor (22) is fixed to the outer end of the mounting frame (21) on one side of the fan (2), and the output end of the motor (22) is fixedly connected to the fan (2).

3. A crawler-type pesticide sprayer according to claim 2, characterized in that: A turntable (23) is fixed on the output end of the motor (22), and a first electric push rod (24) is fixed on the surface of the turntable (23), wherein the extended end of the first electric push rod (24) is fixedly connected to the outer surface of the vertical frame (31).

4. A crawler-type pesticide sprayer according to claim 1, characterized in that: The driving assembly (3) further comprises a bidirectional screw (33), the bidirectional screw (33) is rotatably mounted inside the vertical frame (31) via a bearing, the moving block (32) is threadedly sleeved on the surface of the bidirectional screw (33), and the connecting shaft (52) is fixedly connected to the bottom of the bidirectional screw (33).

5. A crawler-type pesticide sprayer according to claim 4, characterized in that: A connecting frame (38) is fixed in the middle position of the vertical frame (31), and first gears (36) are rotatably mounted on the top and bottom opposite surfaces of the connecting frame (38), and first tooth plates (37) are meshedly connected on both sides of the first gear (36), and the first tooth plates (37) are respectively fixedly connected to the side nozzles (44) and the moving block (32), and a moving groove (39) is provided on the surface of the horizontal plate (34) at a position corresponding to the first tooth plate (37), and the upper and lower groups of first tooth plates (37) of the vertical frame (31) are staggered.

6. A crawler-type pesticide sprayer according to claim 1, characterized in that: The transmission assembly (5) further comprises a storage cavity (51), the storage cavity (51) is arranged at the bottom of the frame (1) corresponding to the vertical frame (31), and the connecting shaft (52) is received in the storage cavity (51), and a second electric push rod (59) is fixed to the side of the second tooth plate (53) of the frame (1), and the extended end of the second electric push rod (59) is fixedly connected to the second tooth plate (53).

7. A crawler-type pesticide sprayer according to claim 6, characterized in that: A slide groove (54) is provided at the bottom of the second tooth plate (53), and a slide seat (56) is slidably connected inside the slide groove (54). The bottom of the second gear (57) is rotatably mounted on the top of the slide seat (56) through a bearing, and a second spring (55) is fixed between the inner wall of the slide groove (54) and the slide seat (56).

8. The crawler-type pesticide sprayer according to claim 1, characterized in that: The nozzle assembly (4) further comprises a first spring (43), the top of the intermediate nozzle (42) is fixed with the first spring (43), and the other end of the first spring (43) is fixedly connected to the horizontal plate (34).

9. A crawler-type pesticide sprayer according to claim 8, characterized in that: A rotating shaft (47) is installed on the surface of the fixed spray head (41), the middle spray head (42) and the side spray head (44), and the angles of the fixed spray head (41), the middle spray head (42) and the side spray head (44) are adjusted by the rotating shaft (47).

10. A crawler-type pesticide sprayer according to claim 9, characterized in that: A hose (46) is fixed to one end of the fixed nozzle (41), the middle nozzle (42) and the side nozzle (44) facing the medicine box (12), and the hose (46) is fixedly connected to the medicine outlet end of the medicine box (12).

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