A crawler type hole-piercing and fertilizer-topdressing machine

Abstract

The present application discloses a crawler-type acupuncture and topdressing machine, which belongs to the field of fertilization technology, and includes a driving device, a fertilizer box, a puncturing assembly, and a control assembly. The fertilizer box is installed on the top of the driving device, and the acupuncture assembly includes a puncturing rod, a first puncturing duckbill flap and a second puncturing duckbill flap. A fertilization chamber can be formed between the first puncturing duckbill flap and the second puncturing duckbill flap, and the puncturing rod is used to drive the first puncturing duckbill flap and the second puncturing duckbill flap to move up and down. The control assembly is used to control the movement of the puncturing rod, and after the puncturing rod moves to the lowest position, the control assembly can control the first puncturing duckbill flap and the second puncturing duckbill flap to open for fertilization. The crawler-type acupuncture and topdressing machine disclosed in the present invention can directly put fertilizer into the hole after completing the puncturing, so as to realize more accurate topdressing operation, effectively improve the fertilizer utilization rate, reduce the waste of chemical fertilizers, and reduce the cost of agricultural production.

Description

Technical Field

[0001] The invention relates to the technical field of fertilization, and in particular to a crawler-type hole-piercing and topdressing machine. Background Art

[0002] Corn and tobacco are important food crops and cash crops in my country. The corn flaring period is a critical period for corn growth and development. During this period, the fertilizer demand is relatively high and the fertilizer demand intensity is relatively high. It is a critical period for the implementation of various management measures. In order to ensure high and stable yields of corn, topdressing needs to be strengthened during this corn flaring period. Topdressing is also an important measure in tobacco field management. According to the growth of tobacco plants in the field, soil and climate conditions, the original planned fertilizer amount can be corrected to ensure the supply of nitrogen fertilizer in the middle and late stages of growth, prevent tobacco from premature fertilization and aging during maturity, and stabilize tobacco yield and quality.

[0003] Existing hole-piercing fertilizer machines are mostly manually carried on the back, which has high labor intensity. In addition, when applying fertilizer, it is easy to spread the fertilizer outside the ditch, resulting in fertilizer waste. The volatilized fertilizer will also cause environmental pollution. Summary of the invention

[0004] The invention discloses a crawler type acupuncture and topdressing machine to improve the above problems.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] Based on the above purpose, the present invention discloses a crawler-type acupuncture and topdressing machine, comprising:

[0007] Drive device;

[0008] A fertilizer box, the fertilizer box is installed on the top of the driving device;

[0009] A piercing assembly, the piercing assembly comprising a piercing rod, a first piercing duckbill flap and a second piercing duckbill flap, the first piercing duckbill flap being mounted on the piercing rod, the second piercing duckbill flap being rotatably connected to the piercing rod, a fertilizing chamber being formed between the first piercing duckbill flap and the second piercing duckbill flap, the fertilizing chamber being connected to the fertilizer box through a fertilizer pipe, and the first piercing duckbill flap being rotated to open or close the fertilizing chamber; and

[0010] A control assembly, the control assembly includes a first control structure and a second control structure, the first control structure includes a first control rod and a second control rod, the first control rod is rotatably connected to the driving device, the first end of the second control rod is rotatably connected to the first control rod, the second end of the second control rod is connected to the piercing rod, the second control structure is installed between the first control structure and the piercing assembly, and the second control structure opens the fertilization chamber when the second piercing duckbill flap moves to the lowest position.

[0011] Optionally: the second control structure includes:

[0012] a rotating wheel connected to the first control rod;

[0013] A first connecting rod, wherein a first end of the first connecting rod is rotatably connected to the rotating wheel, the first connecting rod and the rotating wheel are eccentrically arranged, and a second end of the first connecting rod is slidably matched with the second control rod;

[0014] a second connecting rod, wherein a first end of the second connecting rod is rotatably connected to a second end of the first connecting rod, and a second end of the second connecting rod is slidably matched with the acupuncture rod; and

[0015] A third connecting rod, wherein the first end of the third connecting rod is rotatably connected to the second end of the second connecting rod, and the second end of the third connecting rod is rotatably connected to the second piercing duckbill flap. When the second end of the second connecting rod moves in a direction away from the first piercing duckbill flap, the second connecting rod drives the second piercing duckbill flap to open the fertilization chamber.

[0016] Optionally, the rotation axis between the first connecting rod and the rotating wheel and the rotation axis between the first control rod and the driving device are respectively located on both sides of the rotation axis of the rotating wheel.

[0017] Optionally, an angle between the first connecting rod and the rotation axis of the rotating wheel and an angle between the first control rod and the rotation axis of the driving device relative to the rotation axis of the rotating wheel are obtuse angles;

[0018] The second piercing duckbill flap includes a accommodating portion, a control portion and an elastic member, wherein the control portion is connected to the accommodating portion, and the connection position between the control portion and the accommodating portion is rotatably connected to the piercing rod, the accommodating portion and the first piercing duckbill flap are buckled to form the fertilization chamber, and the two ends of the elastic member are respectively connected to the control portion and the piercing rod, and the elastic member enables the control portion to have a tendency to rotate toward the piercing rod.

[0019] Optionally: the second control rod is provided with a first slide rail and a first matching block, the first slide rail is arranged along the length direction of the second control rod, and the first matching block can slide along the first slide rail; the acupuncture rod is provided with a second slide rail and a second matching block, the second slide rail is arranged along the length direction of the acupuncture rod, and the first matching block can slide along the second slide rail.

[0020] Optionally: a feeding roller is provided on the fertilizer box, the feeding roller is rotatably connected to the fertilizer box, a feeding trough is provided on the feeding roller, and the feeding roller is rotated to connect the feeding trough with the fertilizer box or the fertilizer pipe, so as to feed the fertilizer in the fertilizer box into the fertilizer pipe along the feeding trough.

[0021] Optionally: the feed roller is transmission-connected to the first control rod so that the feed roller can be driven to rotate when the first control rod rotates; when the first control rod drives the piercing assembly to move downward, the feed roller drives the feed trough to rotate from the fertilizer box to the fertilizer pipe.

[0022] Optionally: the feeding trough is arranged along the axial direction of the feeding roller, one end of the feeding trough extends to the side wall of the fertilizer box, and the other end of the feeding trough extends along the feeding roller to the outside of the fertilizer box;

[0023] The feed roller is provided with a fertilizer amount adjustment slider, and the fertilizer amount adjustment slider is slidably matched with the feed roller. The fertilizer amount adjustment slider is provided with a limit block for matching with the feed trough, and the limit block is located in the feed trough, and the limit block extends along the length direction of the feed trough. The fertilizer amount adjustment slider is slid to change the working length of the feed trough in the fertilizer box.

[0024] Optionally: the middle portion of the first control rod is rotatably connected to the driving device, the first end of the first control rod is rotatably connected to the second control rod, and a counterweight is provided at the second end of the first control rod.

[0025] Optionally: the driving device includes a frame and two sets of crawler chassis, the crawler chassis includes two sets of driving wheels, two sets of tracks and two sets of driving motors, the driving motor is installed on the frame, the driving motor is connected to the driving wheel in transmission, the driving wheel is meshed with the track, and the two sets of driving motors are arranged in a one-to-one correspondence with the two sets of driving wheels and the two sets of tracks.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The crawler-type acupuncture and topdressing machine disclosed in the present invention can directly put fertilizer into the acupuncture holes after completing the acupuncture, so as to realize more accurate topdressing operation, effectively improve the fertilizer utilization rate, reduce the waste of chemical fertilizers, and reduce the agricultural production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a crawler-type acupuncture and topdressing machine disclosed in an embodiment of the present invention is shown;

[0029] Figure 2A schematic diagram of a driving device disclosed in an embodiment of the present invention is shown;

[0030] Figure 3 A schematic diagram showing the coordination of the fertilizer box, the piercing assembly and the control assembly disclosed in the embodiment of the present invention is shown;

[0031] Figure 4 A schematic diagram of a fertilizer box disclosed in an embodiment of the present invention is shown;

[0032] Figure 5 A schematic diagram of a feed roller disclosed in an embodiment of the present invention is shown;

[0033] Figure 6 A schematic diagram showing the coordination of multiple groups of acupuncture assemblies disclosed in an embodiment of the present invention is shown;

[0034] Figure 7 A schematic diagram showing the coordination between the acupuncture assembly and the control assembly disclosed in an embodiment of the present invention is shown;

[0035] Figure 8 A schematic diagram of an acupuncture assembly disclosed in an embodiment of the present invention is shown;

[0036] Fig. 9 A schematic diagram showing the cooperation between the acupuncture assembly and the first control structure disclosed in an embodiment of the present invention is shown;

[0037] Fig.10 A schematic diagram showing the cooperation between the acupuncture assembly and the second control structure disclosed in an embodiment of the present invention is shown.

[0038] In the figure:

[0039] 100-driving device, 110-frame, 120-track chassis, 121-driving wheel, 122-track, 123-driving motor, 200-fertilizer box, 210-fertilizer pipe, 220-feeding roller, 221-feeding trough, 230-fertilizer amount adjustment slider, 231-limiting block, 300-piercing assembly, 310-piercing rod, 320-first piercing duckbill flap, 330-second piercing duckbill flap, 331-control unit, 3 32-fastening part, 340-second slide rail, 350-second matching block, 400-control assembly, 410-first control structure, 411-first control rod, 412-second control rod, 413-counterweight block, 414-first slide rail, 415-first matching block, 420-second control structure, 421-rotating wheel, 422-first connecting rod, 423-second connecting rod, 424-third connecting rod, 500-control motor. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0041] Example:

[0042] See also Figures 1 to 3 as well as Figure 8 The embodiment of the present invention discloses a crawler type piercing and topdressing machine, which includes a driving device 100, a fertilizer box 200, a piercing assembly 300 and a control assembly 400. The fertilizer box 200 is installed on the top of the driving device 100, and the piercing assembly 300 includes a piercing rod 310, a first piercing duckbill flap 320 and a second piercing duckbill flap 330. The first piercing duckbill flap 320 and the second piercing duckbill flap 330 can be combined to pierce holes on the land, and a fertilization cavity can be formed between the first piercing duckbill flap 320 and the second piercing duckbill flap 330. The piercing rod 310 is used to drive the first piercing duckbill flap 320 and the second piercing duckbill flap 330 to move up and down. The control assembly 400 is used to control the movement of the piercing rod 310, and after the piercing rod 310 moves to the lowest position, the control assembly 400 can control the first piercing duckbill flap 320 and the second piercing duckbill flap 330 to open for fertilization.

[0043] The crawler-type hole-piercing and topdressing machine disclosed in this embodiment can directly put fertilizer into the hole after completing the hole piercing, thereby achieving more precise topdressing operation, effectively improving fertilizer utilization, reducing fertilizer waste, and reducing agricultural production costs.

[0044] See also Figure 1 and Figure 2 The drive device 100 can adopt a crawler-type walking mechanism. Considering that the spacing between corn rows is generally 600mm and the spacing between tobacco rows is 1200mm, the overall width of the crawler-type piercing and topdressing machine body designed in this scheme is 450mm, which can travel between two rows of corn rows or between two rows of tobacco leaves. Of course, the above parameters are only one implementation in this embodiment. In other implementations, it is also possible to adaptively adjust the size of the drive device 100 according to the local crop planting pattern.

[0045] The driving device 100 mainly includes a frame 110 and a crawler chassis 120. The frame 110 can be assembled from 40×40 mm aluminum profiles, the vehicle is light in weight and has a small ground pressure ratio, and the crawler chassis 120 can travel at a maximum speed of 4 km / h when no topdressing operation is performed.

[0046] The crawler chassis 120 includes two sets of driving wheels 121, two sets of crawlers 122 and two sets of driving motors 123. The driving motor 123 is installed on the frame 110. The driving motor 123 can be powered by a battery pack. The driving motor 123 is connected to the driving wheel 121 by a worm gear reducer. The worm gear can reduce speed and increase torque. The driving wheel 121 is rotatably connected to the frame 110. The driving wheel 121 is a gear structure. The gear teeth on the driving wheel 121 can mesh with the gear teeth on the crawler 122, so that the driving wheel 121 drives the crawler 122 to rotate. The crawler 122 can be made of rubber material, which has light weight and can buffer and absorb vibration. When driving in the field, the ground pressure is small, which can reduce damage to the root system of crops. The two sets of drive motors 123 are arranged in a one-to-one correspondence with the two sets of drive wheels 121 and the two sets of tracks 122. Each set of tracks 122 is controlled by a separate set of drive motors 123. In this way, the speed difference between the two sets of tracks 122 can be used to achieve turning. When the speeds of the two sets of tracks 122 are the same, forward or backward movement can be achieved.

[0047] See also Figures 3 to 5 A fertilizer pipe 210 for conveying fertilizer is disposed at the bottom of the fertilizer box 200, and a feeding roller 220 is disposed in the fertilizer box 200, and the feeding roller 220 is rotatably connected to the fertilizer box 200. The crawler-type piercing and topdressing machine disclosed in this embodiment is mainly suitable for granular fertilizers. Among them, a film pressure sensor can also be disposed in the fertilizer box 200, and the film pressure sensor can be used to detect the remaining amount of fertilizer in the fertilizer box 200. When the remaining amount of fertilizer in the fertilizer box 200 is lower than the preset value of the film pressure sensor, the film pressure sensor can remind the operator to replenish the fertilizer in time by means of an alarm.

[0048] A feeding trough 221 is provided on the feeding roller 220. When the feeding roller 220 rotates, the feeding trough 221 will be alternately connected with the fertilizer box 200 and the fertilizer pipe 210. When the feeding trough 221 is connected with the fertilizer box 200, the fertilizer in the fertilizer box 200 will be filled into the feeding trough 221. When the feeding trough 221 is connected with the fertilizer pipe 210, the fertilizer in the feeding trough 221 will directly fall into the feeding pipe.

[0049] See also Figure 4 and Figure 5The feeding trough 221 is arranged along the axis direction of the feeding roller 220, and one end of the feeding trough 221 extends to the side wall of the fertilizer box 200, and the other end of the feeding trough 221 extends along the feeding roller 220 to the outside of the fertilizer box 200. A fertilizer amount adjustment slider 230 is arranged on the feeding roller 220, and the fertilizer amount adjustment slider 230 is slidably matched with the feeding roller 220, and the fertilizer amount adjustment slider 230 can move relative to the feeding roller 220 along the axis of the feeding roller 220. A limit block 231 for matching with the feeding trough 221 is arranged on the fertilizer amount adjustment slider 230, and the limit block 231 is located in the feeding trough 221, and the limit block 231 extends along the length direction of the feeding trough 221. The fertilizer amount adjustment slider 230 is provided with a volume scale of the feed trough 221. The fertilizer amount adjustment slider 230 can be slid to change the working length of the feed trough 221 in the fertilizer box 200, thereby changing the working volume of the feed trough 221 to achieve the purpose of adjusting the single-hole fertilization amount.

[0050] See also Figures 6 to 8 The piercing assembly 300 includes a piercing rod 310, a first piercing duckbill flap 320 and a second piercing duckbill flap 330. The piercing rod 310 is connected to the driving device 100 through the control assembly 400, and the first piercing duckbill flap 320 is installed on the piercing rod 310. The second piercing duckbill flap 330 is rotatably connected to the piercing rod 310. When the first piercing duckbill flap 320 moves toward the second piercing duckbill flap 330, it can form a fertilizer chamber with the second piercing duckbill flap 330. The fertilizer chamber is connected to the fertilizer box 200 through the fertilizer pipe 210. The first piercing duckbill flap 320 is rotated to open or close the fertilizer chamber. When the fertilizer chamber is closed, the fertilizer can enter the fertilizer chamber along the fertilizer pipe 210 and be temporarily stored. When the fertilizer chamber is opened, the fertilizer in the fertilizer chamber can be sprinkled into the newly pierced hole.

[0051] See also Figures 7 to 10 The control assembly 400 includes a first control structure 410 for controlling the puncture rod 310 and a second control structure 420 for controlling the first puncture duckbill valve 320 .

[0052] See also Fig. 9 The first control structure 410 includes a first control rod 411 and a second control rod 412. The first control rod 411 is rotatably connected to the vehicle frame 110. The first end of the second control rod 412 is rotatably connected to the first control rod 411. The second end of the second control rod 412 is connected to the hole-piercing rod 310. When the first control rod 411 rotates relative to the vehicle frame 110, the hole-piercing rod 310 can be driven to continuously pierce fertilizer holes on the land to facilitate fertilization.

[0053] The middle part (not specifically the middle position, but only different from the end) of the first control rod 411 can be rotatably connected to the vehicle frame 110, the first end of the first control rod 411 can be rotatably connected to the second control rod 412, and then a counterweight 413 is arranged at the second end of the first control rod 411. The counterweight 413 can increase the inertia of the piercing assembly 300 when it moves downward, thereby ensuring that the first piercing duckbill flap 320 and the second piercing duckbill flap 330 can quickly break through the resistance of the soil to complete the piercing action.

[0054] See also Figures 8 to 10 The second control rod 412 is provided with a first slide rail 414 and a first matching block 415. The first slide rail 414 is provided along the length direction of the second control rod 412, and the first matching block 415 can slide along the first slide rail 414. The acupuncture rod 310 is provided with a second slide rail 340 and a second matching block 350. The second slide rail 340 is provided along the length direction of the acupuncture rod 310, and the first matching block 415 can slide along the second slide rail 340.

[0055] See also Fig.10 The second control structure 420 includes a rotating wheel 421, a first connecting rod 422, a second connecting rod 423 and a third connecting rod 424. The rotating wheel 421 is connected to the first control rod 411, and the rotating wheel 421 can be connected to the rotating shafts of the first control rod 411 and the second control rod 412, so as to ensure that the rotating wheel 421 can rotate synchronously with the first control rod 411. Of course, installing the rotating wheel 421 on the rotating shaft is only one implementation of this embodiment. In other implementations, it is also possible to install the rotating wheel 421 at other positions of the first control rod 411.

[0056] The first end of the first connecting rod 422 is rotatably connected to the rotating wheel 421, and the first connecting rod 422 is eccentrically arranged with the rotating wheel 421, and the second end of the first connecting rod 422 is rotatably connected to the first matching block 415 on the second control rod 412. The first end of the second connecting rod 423 is rotatably connected to the first matching block 415, and the second end of the second connecting rod 423 is rotatably connected to the second matching block 350 on the acupuncture rod 310. The first end of the third connecting rod 424 is rotatably connected to the second matching block 350, and the second end of the third connecting rod 424 is rotatably connected to the second acupuncture duckbill flap 330.

[0057] Among them, the middle part of the second piercing duckbill flap 330 (not specifically the middle position, only different from its end) can be rotatably connected to the piercing rod 310, and the third connecting rod 424 can be rotatably connected to one end of the second piercing duckbill flap 330, so that when the second end of the second connecting rod 423 moves in a direction away from the first piercing duckbill flap 320, the second connecting rod 423 can drive the second piercing duckbill flap 330 to open the fertilization chamber.

[0058] In this embodiment, in order to ensure that the acupuncture assembly 300 can match the forward moving direction of the driving device 100 when acupuncture is performed, the driving direction of the first control rod 411 can be set to the counterclockwise direction. In this way, when the acupuncture assembly 300 approaches the ground and continues to move downward, it has a backward planing action, which can match the forward direction of the driving device 100 and better perform the acupuncture action.

[0059] In order to ensure that when the piercing assembly 300 moves upward from the bottom, it is the time for the second piercing duckbill flap 330 to open the fertilizing chamber, the eccentric direction of the first connecting rod 422 and the rotating wheel 421 can be opposite to the extension direction of the first control rod 411, that is, the rotation axis of the first connecting rod 422 and the rotating wheel 421 and the rotation axis of the first control rod 411 and the frame 110 are respectively located on both sides of the rotation axis of the rotating wheel 421, so as to ensure that when the piercing assembly 300 moves upward from the lowest position, the second piercing duckbill flap 330 can open the fertilizing chamber.

[0060] In addition, the angles between the rotation axis of the first connecting rod 422 and the rotating wheel 421 and the rotation axis of the first control rod 411 and the frame 110 relative to the rotation axis of the rotating wheel 421 can be an obtuse angle. The second piercing duckbill flap 330 includes a receiving portion, a control portion 331 and an elastic member (not shown in the figure). The control portion 331 is connected to the receiving portion, and the connection position between the control portion 331 and the receiving portion is rotatably connected to the piercing rod 310. The receiving portion and the first piercing duckbill flap 320 are buckled to form a fertilizer chamber, and the two ends of the elastic member are respectively connected to the control portion 331 and the piercing rod 310, and the elastic member allows the control portion 331 to have a tendency to rotate toward the piercing rod 310. In this way, during the process of the piercing rod 310 moving up and down and the operation of the second control assembly 400, it can be ensured that when the piercing rod 310 moves downward, the fertilization chamber is always kept closed, and the fertilization chamber will begin to open only when the piercing rod 310 moves to the lowest position and starts to move upward; and during the process of the piercing rod 310 moving upward, the fertilization chamber is closed before the piercing rod 310 moves to the highest position, and when the piercing rod 310 continues to move upward, the second control assembly 400 can push the control part 331 to rotate to keep the fertilization chamber closed. In this way, it can be ensured that the piercing rod 310 closes the fertilization chamber before entering the soil, thereby preventing the soil from entering the fertilization chamber.

[0061] The second control structure 420 cooperates with the first control structure 410 to control the puncture assembly 300. At the same time, the second control structure 420 also has an auxiliary limiting function on the action of the puncture rod 310. Usually, in order to realize the puncture action of the puncture rod 310, at least a third control rod needs to be set, one end of the third control rod is rotatably connected to the puncture rod 310, and the other end of the third control rod is rotatably connected to the frame 110, so as to provide a supporting force for the puncture rod 310 to prevent the puncture rod 310 from directly falling under the action of gravity. The control assembly 400 disclosed in this embodiment omits the third control rod, and uses the second control structure 420 to replace the function of the third control rod, thereby making the overall structure of the crawler-type puncture fertilizer topdressing machine more concise.

[0062] See also Figure 3 In one implementation of the present embodiment, a driving structure may be separately provided for the feeding roller 220 to control the frequency at which the fertilizer enters the fertilizing chamber from the fertilizer box 200 along the fertilizer pipe 210 .

[0063] In another implementation of the present embodiment, the feed roller 220 can be rotatably connected to the first control rod 411, so that the feed roller 220 can rotate synchronously with the first control rod 411, ensuring that when the first control rod 411 drives the hole-piercing assembly 300 to move downward, the feed roller 220 drives the feed trough 221 to rotate from the fertilizer box 200 to the fertilizer pipe 210; and when the first control rod 411 drives the hole-piercing assembly 300 to move upward, no fertilizer will enter the hole-piercing assembly 300 along the fertilizer pipe 210, thereby ensuring that the amount of fertilizer delivered into the hole from the hole-piercing assembly 300 is consistent each time.

[0064] In this embodiment, the feed roller 220 can be connected to the rotating shaft of the first control rod 411 through a transmission structure such as a sprocket, a belt or a gear, so as to achieve synchronous control of the first control rod 411 and the feed roller 220. If only one feed trough 221 is provided on the feed roller 220, it is necessary to ensure that the feed roller 220 also rotates one circle or other integer circles for each rotation of the first control rod 411; if a plurality of feed troughs 221 are provided on the feed roller 220, it is necessary to adjust the rotation ratio between the first control rod 411 and the feed roller 220 to ensure that the same number of feed troughs 221 rotates from being connected with the fertilizer box 200 to being connected with the fertilizer pipe 210 for each rotation of the first control rod 411.

[0065] In this embodiment, the piercing components 300 and the control components 400 can be set to two or more groups. These piercing components 300 and the control components 400 are set one by one, and these piercing components 300 are connected to the fertilizer box 200. These control components 400 can share the same group of control motors 500. The control motors 500 can cooperate with the control components 400 in the direction of material sprockets or gear transmission to drive the first control rod 411 to rotate.

[0066] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A crawler type acupuncture and topdressing machine, characterized in that: include: Drive device; A fertilizer box, the fertilizer box is installed on the top of the driving device; A piercing assembly, the piercing assembly comprising a piercing rod, a first piercing duckbill flap and a second piercing duckbill flap, the first piercing duckbill flap being mounted on the piercing rod, the second piercing duckbill flap being rotatably connected to the piercing rod, a fertilizing chamber being formed between the first piercing duckbill flap and the second piercing duckbill flap, the fertilizing chamber being connected to the fertilizer box through a fertilizer pipe, and the first piercing duckbill flap being rotated to open or close the fertilizing chamber; as well as A control assembly, the control assembly includes a first control structure and a second control structure, the first control structure includes a first control rod and a second control rod, the first control rod is rotatably connected to the driving device, the first end of the second control rod is rotatably connected to the first control rod, the second end of the second control rod is connected to the piercing rod, the second control structure is installed between the first control structure and the piercing assembly, and the second control structure opens the fertilization chamber when the second piercing duckbill flap moves to the lowest position; The second control structure comprises: a rotating wheel connected to the first control rod; A first connecting rod, wherein a first end of the first connecting rod is rotatably connected to the rotating wheel, the first connecting rod and the rotating wheel are eccentrically arranged, and a second end of the first connecting rod is slidably matched with the second control rod; a second connecting rod, wherein a first end of the second connecting rod is rotatably connected to a second end of the first connecting rod, and a second end of the second connecting rod is slidably matched with the acupuncture rod; and A third connecting rod, wherein the first end of the third connecting rod is rotatably connected to the second end of the second connecting rod, and the second end of the third connecting rod is rotatably connected to the second piercing duckbill flap. When the second end of the second connecting rod moves in a direction away from the first piercing duckbill flap, the second connecting rod drives the second piercing duckbill flap to open the fertilization chamber.

2. The crawler-type acupuncture and topdressing machine according to claim 1, characterized in that: The rotation axis between the first connecting rod and the rotating wheel and the rotation axis between the first control rod and the driving device are respectively located on both sides of the rotation axis of the rotating wheel.

3. The crawler-type acupuncture and topdressing machine according to claim 2, characterized in that: The angles between the first connecting rod and the rotation axis of the rotating wheel and the first control rod and the rotation axis of the driving device relative to the rotation axis of the rotating wheel are obtuse angles; The second piercing duckbill flap includes a accommodating portion, a control portion and an elastic member, wherein the control portion is connected to the accommodating portion, and the connection position between the control portion and the accommodating portion is rotatably connected to the piercing rod, the accommodating portion and the first piercing duckbill flap are buckled to form the fertilization chamber, and the two ends of the elastic member are respectively connected to the control portion and the piercing rod, and the elastic member enables the control portion to have a tendency to rotate toward the piercing rod.

4. The crawler-type acupuncture and topdressing machine according to claim 1, characterized in that: The second control rod is provided with a first slide rail and a first matching block, the first slide rail is arranged along the length direction of the second control rod, and the first matching block can slide along the first slide rail; the acupuncture rod is provided with a second slide rail and a second matching block, the second slide rail is arranged along the length direction of the acupuncture rod, and the first matching block can slide along the second slide rail.

5. The crawler-type acupuncture and topdressing machine according to claim 1, characterized in that: The fertilizer box is provided with a feeding roller, the feeding roller is rotatably connected to the fertilizer box, the feeding roller is provided with a feeding trough, the feeding roller is rotated to connect the feeding trough with the fertilizer box or the fertilizer pipe, so as to feed the fertilizer in the fertilizer box into the fertilizer pipe along the feeding trough.

6. The crawler-type acupuncture and topdressing machine according to claim 5, characterized in that: The feed roller is transmission-connected to the first control rod so that the feed roller can be driven to rotate when the first control rod rotates; when the first control rod drives the piercing assembly to move downward, the feed roller drives the feed trough to rotate from the fertilizer box to the fertilizer pipe.

7. The crawler-type acupuncture and topdressing machine according to claim 5, characterized in that: The feeding trough is arranged along the axial direction of the feeding roller, one end of the feeding trough extends to the side wall of the fertilizer box, and the other end of the feeding trough extends along the feeding roller to the outside of the fertilizer box; The feed roller is provided with a fertilizer amount adjustment slider, and the fertilizer amount adjustment slider is slidably matched with the feed roller. The fertilizer amount adjustment slider is provided with a limit block for matching with the feed trough, and the limit block is located in the feed trough, and the limit block extends along the length direction of the feed trough. The fertilizer amount adjustment slider is slid to change the working length of the feed trough in the fertilizer box.

8. The crawler-type acupuncture and topdressing machine according to any one of claims 1 to 7, characterized in that: The middle portion of the first control rod is rotatably connected to the driving device, the first end of the first control rod is rotatably connected to the second control rod, and a counterweight is disposed at the second end of the first control rod.

9. The crawler-type acupuncture and topdressing machine according to any one of claims 1 to 7, characterized in that: The driving device includes a frame and two sets of crawler chassis, the crawler chassis includes two sets of driving wheels, two sets of crawlers and two sets of driving motors, the driving motors are installed on the frame, the driving motors are connected to the driving wheels in a transmission manner, the driving wheels are meshed with the crawlers, and the two sets of driving motors are arranged in a one-to-one correspondence with the two sets of driving wheels and the two sets of crawlers.

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