A device for automatically adjusting the amount of fertilizer applied

Abstract

The invention relates to the technical field of crop fertilization, and more specifically to a device for automatically adjusting the amount of fertilizer applied, comprising a loading frame, a loading box, a feeding bin, a running wheel and a guide wheel. The invention can realize autonomous traction and movement by fixedly connecting the loading frame to an existing agricultural machinery vehicle. The running wheel can rotate in the process of contacting with the soil through ribs arranged on the surface of the running wheel. The guide wheel is driven in a strip-shaped field groove by the elastic force of a compression spring. After the fertilizer has fallen, the fertilizer is pressed into the soil by the rolling of the guide wheel, thereby improving the contact degree between the two and reducing the transfer or scattering of the fertilizer caused by external wind. According to the nature of the fertilizer or the fertilization method, the transmission ratio between the running wheel and the power shaft can be changed by changing the diameter of the sprocket, thereby realizing graded speed regulation of the rotation speed of the regulating shaft, and further realizing controllable regulation of the amount of fertilizer applied.

Description

Technical Field

[0001] The invention relates to the technical field of crop fertilization, in particular to a device for automatically adjusting the amount of fertilization. Background Art

[0002] Fertilizer refers to a type of substance that provides one or more essential nutrients for plants, improves soil properties, and increases soil fertility. It is one of the material bases of agricultural production. It mainly includes ammonium phosphate fertilizers, water-soluble fertilizers with large amounts of elements, fertilizers with medium amounts of elements, biological fertilizers, organic fertilizers, multi-dimensional field energy concentrated organic fertilizers, etc. Fertilization refers to the agricultural technical measures of applying fertilizers to the soil or spraying them on plants to provide the nutrients required by plants and maintain and improve soil fertility. The main purpose of fertilization is to increase crop yields, improve crop quality, improve soil fertility, and improve economic benefits. Therefore, reasonable and scientific fertilization is one of the main means to ensure food security and maintain sustainable agricultural development. According to different fertilization modes, it can be divided into broadcasting, flushing, hole application, and strip application. Broadcasting and flushing are conducive to the diffusion of nutrients and are easy to apply, but the nutrient loss is large and the utilization rate is low. Hole application and strip application have less nutrient loss and high utilization rate, but they consume a certain amount of mechanical energy. With the development of modern precision agriculture, the use of fertilizer machinery for strip application has led to rapid development of precision fertilization.

[0003] Precise control of the amount of fertilizer applied is a prerequisite and necessary condition for mechanical fertilization. However, existing mechanical fertilization methods make it difficult to reasonably control the amount of fertilizer applied according to soil properties or fertilizer types, or to finely process uniform fertilizer particles according to the required fertility effectiveness time and concentration. The single fertilization method increases the problem of uneven soil fertility and increased resource consumption caused by repeated fertilization.

[0004] In view of this, the present invention proposes a device for automatically adjusting the amount of fertilizer applied, which solves the above technical problems. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides a device for automatically adjusting the amount of fertilizer applied, thereby solving the problem that traditional fertilizing machinery is difficult to reasonably control the amount and state of fertilizer falling according to the soil environment or fertilization method in a timely manner, which easily causes uneven soil fertilizer efficiency and high utilization rate of human and material resources.

[0006] The technical solution adopted by the present invention to solve its technical problems is a device for automatically adjusting the amount of fertilizer applied, comprising a loading frame, a loading box, a lower feed bin, walking wheels and guide wheels, wherein the walking wheels are rotatably mounted on both ends of the loading frame, the loading box is fixedly mounted above the loading frame, a plurality of lower feed bins are fixedly mounted on the loading frame, the lower feed bins and the loading box are connected via a hose, the guide wheel is fixedly mounted on the loading frame via a tripod, a compression spring is connected between the tripod and the loading frame, the lower feed bin is located above the guide wheel, an adjusting shaft is rotatably mounted in the lower feed bin, a plurality of transport troughs for loading fertilizers are provided on the adjusting shaft, and furthermore, a loose plate is fixedly mounted on the inner side of the lower feed bin, the loose plate is tiltedly mounted, the middle portion of the loose plate is a comb-tooth structure, and the loose plate is located above the adjusting shaft.

[0007] Preferably, a power shaft is installed between the multiple adjustment shafts, and one end of the power shaft is connected to the end of the installation shaft of one of the walking wheels through a sprocket and a chain for transmission, wherein a plurality of sprockets are provided, and the diameters of the plurality of sprockets gradually increase.

[0008] Preferably, a cone plate for soil grooving is fixedly installed in the middle of the tripod, the middle of the cone plate is hollow, and the bottom of the lower silo is connected to the middle of the cone plate through a telescopic tube, and the guide wheels are respectively located on the front and rear sides of the cone plate.

[0009] Preferably, a strip-shaped slot is opened on the side wall of the lower material bin, a transparent observation window is fixedly installed in the slot, a loose shaft is rotatably installed in the middle of the lower material bin, the loose shaft is located above the loose plate, and the loose shaft is located in the center of the observation window.

[0010] Preferably, both ends of the loose shaft pass through and are exposed from the lower hopper, a flat groove is provided at the end of the loose shaft, and a swing tube is slidably connected between two adjacent loose shafts, a swing spring is connected between the end of the loose shaft and the swing tube, and the end of the loose shaft close to the walking wheel direction is connected to one end of the power shaft through a synchronous belt and a synchronous wheel.

[0011] Preferably, spherical protrusions are evenly arranged on the loose axis, a tough arc surface bent toward the loose axis is arranged in the middle of the loose plate, and the protrusions are in sliding contact with the arc surface.

[0012] Preferably, a knocking rod is fixedly installed on the loose shaft, and the knocking rod is located on the outside of the lower material bin. The lower material bin as a whole is a pyramid structure, and a reinforcement plate is fixedly installed on the outer wall of the lower material bin. A knocking ball is rotatably installed on the end of the knocking rod, and the knocking ball is in rigid contact with the reinforcement plate during rotation.

[0013] Preferably, there are multiple transport troughs, and circular hole grooves are circumferentially opened in the transport trough, the diameter of the hole groove is larger than the diameter of the fertilizer, and a bonding plate is fixedly installed on the side wall of the lower hopper, and a friction plate is provided on the side of the bonding plate facing the transport trough.

[0014] Preferably, knife edge grooves are evenly opened on the upper part of the bonding plate, and a plurality of slitting knives are slidably installed in the knife edge grooves. The slitting knives are all installed at an angle, and an inclined knife edge is provided at one end of the slitting knife, and the knife edge is obliquely inserted into the carrying groove. The side wall of the bonding plate is installed with a clamping bolt by a threaded connection, and the end of the clamping bolt rests on the side wall of the knife edge groove.

[0015] Preferably, a plurality of extrusion rods are fixedly installed in the middle of the lower material bin, the extrusion rods correspond to the carrying grooves one by one and a gap is reserved between the two, and the extrusion rods are located below the loose plate.

[0016] Preferably, the blade thickness of the slitting knife gradually increases from top to bottom, and the maximum thickness of the slitting knife is less than the slot width of the carrying slot.

[0017] Beneficial effects of the present invention:

[0018] (1) In the present invention, the loading frame is fixedly connected to the existing agricultural machinery vehicle, so that autonomous traction movement can be achieved. The running wheel can rotate by itself in the process of contacting with the soil through the ribs arranged on its surface. The self-elastic force of the compression spring is used to make the guide wheel run in the strip-shaped field groove. After the fertilizer is dropped, the fertilizer is pressed into the soil by the rolling of the guide wheel, thereby improving the contact degree between the two and reducing the transfer or scattering of fertilizer caused by external wind force. According to the nature of the fertilizer or the fertilization method, the transmission ratio between the running wheel and the power shaft can be changed by changing the sprocket diameter, thereby realizing the graded speed regulation of the adjustment shaft speed, and further realizing the controllable regulation of the fertilizer amount. The cone plate can use its conical front part to groove the soil during the forward movement, thereby facilitating the subsequent spreading and covering of the fertilizer, reducing the exposure and volatilization degree of the fertilizer in the air, and improving the effective utilization rate of the fertilizer.

[0019] (2) In the present invention, during the entire fertilizer spreading period, the loose shaft is in a state of continuous rotation and horizontal telescopic movement. At this time, the fertilizer particles gathered at the bottom of the lower hopper are dispersed to the surroundings under the frequent stirring action and evenly cover the upper part of the adjusting shaft. Along with the rotation of the adjusting shaft itself, the fertilizer particles can gradually fall into the carrying trough for quantitative transfer and spreading. The intermittent collision and knocking action between the knocking ball and the reinforcement plate during the circumferential rotation process can increase the left and right telescopic range of the loose shaft. Combined with the vibration effect during the knocking, the fertilizer particles in the lower hopper are dispersed more evenly, and the sliding speed of the fertilizer powder generated by friction or impact is increased, thereby reducing the amount of fertilizer residue after fertilization.

[0020] (3) In the present invention, the fertilizer particles can be decomposed and crushed step by step through the blade blocking effect of the slitting knife, and powder can be obtained from the particles. The friction plate located on the inner side of the bonding plate can further improve the refinement degree of the fertilizer particles. The extrusion rod arranged corresponding to the carrying trough can block and intercept at the upper position when the fertilizer is finely crushed, thereby preventing the fertilizer particles from transferring and overflowing to the outside of the carrying trough, improving the contact degree between the fertilizer particles and the slitting knife during movement, and improving the crushing rate of the fertilizer particles. The crushed fertilizer is distributed in the soil after falling, and is quickly decomposed and absorbed by the soil, thereby increasing the fertility effectiveness time in the fertilization area in a short time, meeting the needs of different fertilization operations, enriching the fertilization methods and improving the effective utilization of fertilizers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall connection structure from a first viewing angle of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall connection structure from a second viewing angle of the present invention;

[0024] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0025] Figure 4 It is a schematic diagram of the positional relationship between the lower silo and the tripod of the present invention;

[0026] Figure 5 for Figure 4 The enlarged schematic diagram of point B in FIG.

[0027] Figure 6 for Figure 4 The enlarged schematic diagram of point C in FIG.

[0028] Figure 7 It is a schematic diagram of the positional relationship between the lower silo and the adjustment shaft in the present invention;

[0029] Figure 8 for Figure 7 The enlarged schematic diagram of D in FIG.

[0030] Fig. 9 for Figure 7 The enlarged schematic diagram of point E in FIG.

[0031] Fig.10 for Figure 7 The enlarged schematic diagram of F in FIG.

[0032] Fig.11 for Figure 7The enlarged schematic diagram of point G in FIG.

[0033] In the figure: 1, loading rack; 2, loading box; 3, unloading bin; 4, walking wheel; 5, guide wheel; 6, tripod; 11, compression spring; 7, adjusting shaft; 8, carrying trough; 9, loose plate; 71, power shaft; 61, cone plate; 62, telescopic tube; 31, observation window; 32, loose shaft; 321, plane notch; 33, swing tube; 34, swing spring; 322, protrusion; 323, knock rod; 35, reinforcement plate; 36, fitting plate; 37, friction plate; 361, slitting knife; press 362, tightening bolt; 38, extrusion rod. DETAILED DESCRIPTION

[0034] 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.

[0035] The embodiment of the present invention provides a device for automatically adjusting the amount of fertilizer applied, thereby solving the problem that traditional fertilizer application machinery is difficult to reasonably control the amount and state of fertilizer dropped according to the soil environment or the fertilization method in a timely manner, which easily causes uneven soil fertilizer efficiency and high utilization of human and material resources.

[0036] In order to make the amount of fertilizer to be adjusted automatically according to the soil properties or fertilization method, such as Figure 1 , Figure 2 , Figure 4 , Figure 7 and Fig.10 As shown, a preferred embodiment of the present invention provides a device for automatically adjusting the amount of fertilizer applied, comprising a loading frame 1, a loading box 2, a lower feed bin 3, a walking wheel 4 and a guide wheel 5, wherein the walking wheel 4 is rotatably mounted on both ends of the loading frame 1, the loading box 2 is fixedly mounted above the loading frame 1, a plurality of lower feed bins 3 are fixedly mounted on the loading frame 1, the lower feed bins 3 are connected to the loading box 2 via a hose, the guide wheel 5 is fixedly mounted on the loading frame 1 via a tripod 6, a compression spring 11 is connected between the tripod 6 and the loading frame 1, the lower feed bin 3 is located above the guide wheel 5, an adjusting shaft 7 is rotatably mounted in the lower feed bin 3, a plurality of transport slots 8 for loading fertilizers are provided on the adjusting shaft 7, a loose plate 9 is fixedly mounted on the inner side of the lower feed bin 3, the loose plate 9 is tiltedly mounted, the middle portion of the loose plate 9 is a comb-tooth structure, and the loose plate 9 is located above the adjusting shaft 7.

[0037] During operation, autonomous traction and movement can be achieved by fixedly connecting the loading frame 1 to the existing agricultural machinery vehicle. The running wheel 4 can rotate on its own during contact with the soil through the ribs arranged on its surface. The guide wheel 5 is made to travel in the field groove of strip application by utilizing the elastic force of the compression spring 11. After the fertilizer has fallen, the fertilizer is pressed into the soil by the rolling of the guide wheel 5, thereby increasing the contact degree between the two and reducing the transfer or scattering of fertilizer caused by external wind force. The loading box 2 is used for unified loading of fertilizers, thereby reducing the back and forth feeding movement of the fertilizing machinery in the field. Multiple lower feed bins can realize the secondary loading of fertilizers, and the controllable spreading of fertilizers can be achieved by utilizing the adjusting shaft 7 and the carrying trough 8.

[0038] Furthermore, in order to make the fertilizer application amount and the travel speed of the fertilizer application machine adaptively coordinated, such as Figure 4 , Figure 5 and Figure 7 As shown, a power shaft 71 is installed between the multiple adjustment shafts 7, and one end of the power shaft 71 is connected to the end of the mounting shaft of one of the walking wheels 4 through a sprocket and a chain for transmission, wherein a plurality of sprockets are provided, and the diameters of the plurality of sprockets gradually increase, and a cone plate 61 for soil grooving is fixedly installed in the middle of the tripod 6, the middle of the cone plate 61 is hollow, and the bottom of the lower silo 3 is connected to the middle of the cone plate 61 through a telescopic tube 62, and the guide wheels 5 are respectively located on the front and rear sides of the cone plate 61.

[0039] During operation, the controllable transmission effect between the sprocket and the chain is utilized. During the walking and rotating process of the traveling wheel 4, the power shaft 71 is driven to rotate through the chain machine sprocket, and then the adjusting shaft 7 is driven to rotate through the power shaft 71. At this time, the rotation speed of the adjusting shaft 7 is adapted to the rotation speed of the traveling wheel 4. According to the nature of the fertilizer or the fertilization method, the transmission ratio between the traveling wheel 4 and the power shaft 71 can be changed by changing the sprocket diameter, thereby realizing graded speed regulation of the rotation speed of the adjusting shaft 7, and further realizing controllable regulation of the amount of fertilizer applied. The cone plate 61 can use its conical front part to perform grooving of the soil during the forward movement, thereby facilitating the subsequent spreading and covering of the fertilizer, reducing the degree of exposure and volatilization of the fertilizer in the air, and improving the effective utilization rate of the fertilizer.

[0040] Furthermore, in order to make the fertilizer fall evenly into the carrying trough 8 and realize the precise control of the fertilizer spreading amount, Figure 3 , Figure 6 , Figure 7 and Fig. 9As shown, a strip-shaped slot is provided on the side wall of the lower material bin 3, and a transparent observation window 31 is fixedly installed in the slot. A loose shaft 32 is rotatably installed in the middle of the lower material bin 3, and the loose shaft 32 is located above the loose plate 9. The loose shaft 32 is located in the center of the observation window 31. Both ends of the loose shaft 32 pass through and are exposed to the lower material bin 3. A flat slot 321 is provided at the end of the loose shaft 32, and a swing tube 33 is slidably connected between two adjacent loose shafts 32. A swing spring 34 is connected between the end of the loose shaft 32 and the swing tube 33. The end of the loose shaft 32 close to the walking wheel 4 is connected to one end of the power shaft 71 through a synchronous belt and a synchronous wheel.

[0041] During operation, the fertilizer particles entering the lower hopper 3 gradually gather at the bottom under the action of gravity. At this time, the comb-shaped loose plate 9 can automatically disperse the fertilizer falling path. During the rotation of the power shaft 71, the loose shaft 32 is rotated through the transmission action of the synchronous wheel and the synchronous belt. At this time, the loose shaft 32 and the swing tube 33 are split-type transmissions, and there is a telescopic gap within a certain degree of freedom between the two. Through the elastic telescopic ability of the swing spring 34, the loose shaft 32 has adaptive position recovery performance after telescopic swing. During the entire fertilizer spreading period, the loose shaft 32 is in a state of continuous rotation and telescopic movement in the horizontal direction. At this time, the fertilizer particles gathered at the bottom of the lower hopper 3 are dispersed to the surroundings under the frequent stirring action, and evenly cover the upper part of the adjusting shaft 7. Along with the rotation of the adjusting shaft 7 itself, the fertilizer particles can gradually fall into the carrying trough 8 for quantitative transportation and spreading.

[0042] Furthermore, in order to further improve the uniformity of the fertilizer falling rate in each area of ​​the lower feed bin 3, as Figures 7 to 10 As shown, spherical protrusions 322 are evenly arranged on the loose shaft 32, a tough arc surface bent toward the loose shaft 32 is arranged in the middle part of the loose plate 9, and the protrusion 322 is in sliding contact with the arc surface, a knocking rod 323 is fixedly installed on the loose shaft 32, the knocking rod 323 is located on the outside of the lower material bin 3, the lower material bin 3 is a pyramid structure as a whole, a reinforcement plate 35 is fixedly installed on the outer wall of the lower material bin 3, a knocking ball is rotatably installed on the end of the knocking rod 323, and the knocking ball is in rigid contact with the reinforcement plate 35 during rotation.

[0043] During operation, during the rotation of the loose shaft 32, the protrusion 322 on its outer contour can intermittently contact the arc-shaped surface in the middle of the loose plate 9, and the extrusion effect during contact makes the comb teeth of the loose plate 9 deflect back and forth up and down, thereby increasing the vibration frequency of the fertilizer particles at the bottom of the lower bin 3, and increasing the rate and smoothness of the fertilizer particles falling into the transport trough 8. In addition, along with the rotation of the loose shaft 32, the knocking rod 323 rotates synchronously, and the intermittent collision and knocking effect between the knocking ball and the reinforcement plate 35 during the circumferential rotation is used to increase the left and right extension and contraction range of the loose shaft 32. Combined with the vibration effect during knocking, the fertilizer particles in the lower bin 3 are dispersed more evenly, and the sliding speed of the fertilizer powder generated by friction or impact is increased, thereby reducing the amount of fertilizer residue after fertilization.

[0044] Furthermore, after the fertilizer particles are produced, their particle diameters are uniform. When the fertilizer machinery encounters fertilizer-deficient soil during the mobile fertilization process, in order to make the fertilizer reach the maximum fertilizer effect in a short time, the fertilizer particles are finely processed to increase the binding rate between the fertilizer and the soil and increase the fertilizer effect time. In order to make the fertilizer effect of the fertilizer particles change to adapt to the fertility requirements of the soil, such as Figure 7 , Fig.10 and Fig.11 As shown, the carrying groove 8 is provided with a plurality of circular hole grooves in the circumferential direction of the carrying groove 8, the diameter of the hole groove is larger than the diameter of the fertilizer, a fitting plate 36 is fixedly installed on the side wall of the lower hopper 3, a friction plate 37 is provided on the side of the fitting plate 36 facing the carrying groove 8, a knife edge groove is evenly provided on the upper part of the fitting plate 36, a plurality of cutting knives 361 are slidably installed in the knife edge groove, the cutting knives 361 are all inclinedly installed, one end of the cutting knife 361 is provided with an inclined knife edge, and the knife edge is inclined. Inserted into the transport groove 8, the side wall of the fitting plate 36 is installed with a clamping bolt 362 by a threaded connection, and the end of the clamping bolt 362 is against the side wall of the knife edge groove, and a plurality of extrusion rods 38 are fixedly installed in the middle of the lower hopper 3, the extrusion rods 38 correspond to the transport groove 8 one by one, and the extrusion rods 38 are located below the loose plate 9, the blade thickness of the slitting knife 361 gradually increases from top to bottom, and the maximum thickness of the slitting knife 361 is less than the slot width of the transport groove 8.

[0045] During operation, when it is necessary to increase the effective time of fertilizer in a certain area, in order to avoid the extra resource consumption caused by repeated fertilization process, when the fertilizer application machine moves to this area, the operator pushes the slitting knife 361 along the blade groove to insert it into the carrying groove 8, and tightens the clamping bolt 362 after adjustment. At this time, when the fertilizer particles fall into the carrying groove 8 and rotate to the position of the slitting knife 361, the blade blocking effect of the slitting knife 361 can make the fertilizer particles decompose and crush step by step, and the powder is obtained from the particles. The friction plate 37 located on the inner side of the bonding plate 36 can lift the fertilizer particles. The degree of fineness of the particles, and the extrusion rod 38 arranged corresponding to the transport trough 8 can be blocked at the upper position when the fertilizer is finely crushed, thereby preventing the fertilizer particles from transferring and overflowing to the outside of the transport trough 8, improving the contact degree between the fertilizer particles and the cutting knife 361 during movement, and improving the crushing rate of the fertilizer particles. The crushed fertilizer is distributed in the soil after falling and is quickly decomposed and absorbed by the soil, thereby increasing the fertility effectiveness time in the fertilization area in a short time, meeting the needs of different fertilization operations, enriching the fertilization methods and improving the effective utilization of fertilizers.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for automatically adjusting the amount of fertilizer applied, comprising a loading frame (1), a loading box (2), a feed bin (3), a running wheel (4) and a guide wheel (5), wherein the running wheel (4) is rotatably mounted on both ends of the loading frame (1), the loading box (2) is fixedly mounted above the loading frame (1), a plurality of feed bins (3) are fixedly mounted on the loading frame (1), the feed bins (3) and the loading box (2) are connected via a hose, the guide wheel (5) is fixedly mounted on the loading frame (1) via a tripod (6), a compression spring (11) is connected between the tripod (6) and the loading frame (1), the feed bin (3) is located above the guide wheel (5), It is characterized in that An adjusting shaft (7) is rotatably mounted in the lower feed bin (3), and a plurality of transport troughs (8) for loading fertilizers are provided on the adjusting shaft (7). A loose plate (9), wherein the loose plate (9) is fixedly mounted on the inner side of the lower hopper (3), the loose plate (9) is tiltedly mounted, the middle portion of the loose plate (9) is a comb-tooth structure, and the loose plate (9) is located above the adjustment shaft (7); A power shaft (71) is commonly installed between the plurality of adjustment shafts (7), and one end of the power shaft (71) is connected to the end of the mounting shaft of one of the travel wheels (4) via a sprocket and a chain for transmission, wherein a plurality of sprockets are provided, and the diameters of the plurality of sprockets gradually increase; The side wall of the lower material bin (3) is provided with a strip-shaped notch, a transparent observation window (31) is fixedly installed in the notch, a loosening shaft (32) is rotatably installed in the middle of the lower material bin (3), the loosening shaft (32) is located above the loosening plate (9), and the loosening shaft (32) is located in the center of the observation window (31); A knocking rod (323) is fixedly mounted on the loose shaft (32), the knocking rod (323) is located outside the lower material bin (3), the lower material bin (3) is a pyramid structure as a whole, a reinforcement plate (35) is fixedly mounted on the outer wall of the lower material bin (3), a knocking ball is rotatably mounted on the end of the knocking rod (323), and the knocking ball is in rigid contact with the reinforcement plate (35) during rotation; Both ends of the loose shaft (32) penetrate through and are exposed from the lower hopper (3); a plane notch (321) is provided at the end of the loose shaft (32); a swing tube (33) is slidably connected between two adjacent loose shafts (32); a swing spring (34) is connected between the end of the loose shaft (32) and the swing tube (33); and the end of the loose shaft (32) close to the walking wheel (4) is connected to one end of the power shaft (71) through a synchronous belt and a synchronous wheel for transmission.

2. According to the device for automatically adjusting the amount of fertilizer applied as claimed in claim 1, Features: A cone plate (61) for soil grooving is fixedly mounted in the middle of the tripod (6); the cone plate (61) is hollow in the middle, and the bottom of the lower silo (3) is connected to the middle of the cone plate (61) via a telescopic tube (62); and the guide wheels (5) are respectively located at the front and rear sides of the cone plate (61).

3. According to the device for automatically adjusting the amount of fertilizer applied as claimed in claim 2, Features: The loose shaft (32) is evenly provided with spherical protrusions (322), the middle part of the loose plate (9) is provided with a tough arc surface that bends in the direction of the loose shaft (32), and the protrusions (322) are in sliding contact with the arc surface.

4. According to the device for automatically adjusting the amount of fertilizer applied as claimed in claim 1, Features: The transport trough (8) is provided with a plurality of circular hole grooves in the inner circumference of the transport trough (8), the diameter of the hole groove being larger than the diameter of the fertilizer, a bonding plate (36) is fixedly mounted on the side wall of the lower feed bin (3), and a friction plate (37) is provided on the side of the bonding plate (36) facing the transport trough (8).

5. A device for automatically adjusting the amount of fertilizer applied according to claim 4, Features: The upper part of the bonding plate (36) is evenly provided with knife edge grooves, and a plurality of slitting knives (361) are slidably installed in the knife edge grooves. The slitting knives (361) are all installed at an angle, and an inclined knife edge is provided at one end of the slitting knife (361), and the knife edge is obliquely inserted into the carrying groove (8). The side wall of the bonding plate (36) is installed with a clamping bolt (362) in a threaded connection manner, and the end of the clamping bolt (362) is against the side wall of the knife edge groove.

6. A device for automatically adjusting the amount of fertilizer applied according to claim 5, Features: A plurality of extrusion rods (38) are fixedly mounted in the middle of the lower material bin (3), the extrusion rods (38) correspond one to one with the carrying slots (8), and the extrusion rods (38) are located below the loose plate (9).

7. A device for automatically adjusting the amount of fertilizer applied according to claim 6, Features: The blade thickness of the slitting knife (361) gradually increases from top to bottom, and the maximum thickness of the slitting knife (361) is less than the slot width of the carrying slot (8).

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