CN207369566U - A kind of adjustable fertilizer applicator - Google Patents

Abstract

The utility model is related to agricultural machinery equipment technical fields, disclose a kind of adjustable fertilizer applicator, including rack, suspension assembly, depth adjustment component, multiple elastic claws trench digging component and top dressing component.The utility model is adjustable, and fertilizer applicator can freely adjust trench digging position, freely adjust ditching depth in the longitudinal direction and can freely adjust fertilising rate in the horizontal, it can adapt to the top dressing demand of the dense planting crop such as wheat under Different Ways of Planting, on the one hand manpower has been saved, has improved operating efficiency, on the other hand, so that the top dressing fertilizer of dense planting crop can also directly be applied to underground, fertilizer is avoided earth's surface be easy to cause waste the problem of.

Description

An adjustable top dressing machine

technical field

The utility model relates to the technical field of agricultural machinery, in particular to an adjustable top dressing machine.

Background technique

There are many kinds of crops in our country, including row crops such as corn and densely planted crops such as wheat. For different crops, the methods of fertilization are also different. With the advancement of science and technology and the advancement of agricultural industrialization, various fertilizer spreaders have emerged as the times require. However, most of the intertillage topdressing machines on the market are mainly for intertillage crops such as corn and soybeans. The soil disturbance is large during operation, so it is not suitable. A dense crop of wheat.

At present, in order to ensure the yield of densely planted crops, artificial fertilizer or fertilizer spreader is often used to spread fertilizer on the surface for topdressing. On the one hand, the method of manual fertilization is labor-intensive, low-efficiency, and uneven distribution of fertilization. Even if a fertilizer spreader is used, it is difficult to apply fertilizer evenly along the horizontal and vertical directions of the crops, and at the same time, it cannot be properly distributed according to the planting density of the crops. Fertilization; on the other hand, 60% of the nitrogen fertilizer applied in this way enters the environment through various channels, and the lost nitrogen not only increases agricultural input, but also causes ecological and environmental problems such as soil acidification and water eutrophication.

Utility model content

(1) Technical problems to be solved

The utility model provides an adjustable topdressing machine to solve the problems that densely planted crops cannot be topdressed as required and fertilizers are seriously wasted.

(2) Technical solution

In order to solve the above technical problems, the utility model provides an adjustable topdressing machine, which includes a frame, a suspension assembly, a depth adjustment assembly, a plurality of elastic tooth ditching assemblies and a topdressing assembly;

The frame includes a beam, and the suspension assembly is arranged on the upper front of the frame and is connected and fixed with the frame;

The depth adjustment assembly includes two depth-gauge wheels symmetrically arranged below the two ends of the crossbeam, the axle of each depth-gauge wheel is connected with a height adjustment handle, and the height adjustment handle is fixed on both ends of the crossbeam;

The plurality of spring tooth ditching assemblies are arranged on the beam at intervals, each of the spring tooth ditching assemblies includes S-shaped spring teeth and arc surface openers that are detachably connected up and down, wherein the S The S-shaped spring tooth and the frame are detachably fixed on the beam through the spring tooth holder, and the curved surface opener is arranged below the S-shaped spring tooth;

The topdressing assembly includes a fertilizer box arranged above the frame, and the fertilizer box is provided with an adjustable fertilizer outlet provided with a spiral fertilizer discharger corresponding to each spring tooth ditching assembly, and the adjustable fertilizer outlet is connected to There is a fertilizer discharge pipe, and the discharge port end of the fertilizer discharge pipe is arranged on the side of the lower part of the S-shaped spring teeth away from the arc surface opener.

Further, the rotating fertilizer shafts of each spiral fertilizer device are arranged coaxially;

The rotating fertilizer shaft is driven to rotate by a transmission mechanism connected with the depth-gauge wheel.

Further, the transmission mechanism includes a driving wheel arranged coaxially with the depth gauge wheel, a driven wheel arranged on the rotary fertilizer-discharging shaft, and a chain connected between the driving wheel and the driven wheel.

Further, the suspension assembly is a three-point suspension, and the three support walls of the three-point suspension are all welded to the frame.

Further, the axle of each said depth-gauge wheel is connected with two said height-adjusting handles, and said two said height-adjusting handles are arranged symmetrically on the left and right sides of said depth-gauge wheel respectively, and said two said height-adjusting handles They are respectively fixed on the beams by fasteners.

Further, the fastener is provided with a scale along its vertical upper edge.

Further, the fastener includes two fastening plates and bolts matched with the two fastening plates, wherein the height adjustment handle is arranged between the two fastening plates, and the left and right sides of the fastening plate are both arranged There are bolt holes, and the bolt holes on the same side of the two fastening plates are arranged in alignment, and the bolts pass through the bolt holes on the same side of the two fastening plates in sequence.

Further, the spring tooth holder includes an upper fixing plate, a lower fixing plate and two U-shaped bolts matched with the upper fixing plate and the lower fixing plate;

Wherein, the upper fixing plate and the lower fixing plate are aligned up and down and respectively arranged on the upper and lower ends of the frame beam, and the width of both ends of the upper fixing plate and the lower fixing plate is larger than that of the frame The width of the beam, the width of the upper fixing plate and the lower fixing plate, and the two ends of the frame beam are respectively provided with two bolt holes aligned up and down, and the distance between the two bolt holes on the same side is the same as the The width between the two vertical bolts of the U-shaped bolts is consistent;

The middle section of the upper fixed plate protrudes upwards, the middle section of the lower fixed plate protrudes downwards, and the upper half curved section of the S-shaped spring tooth is wound on the frame beam and passes through the upper fixed plate. Between the protrusion of the middle section and the upper end surface of the frame crossbeam and between the protrusion of the middle section of the lower fixing plate and the lower end surface of the frame crossbeam, the two U-shaped bolts respectively pass through the same-side bolt holes of the two fixing plates in sequence.

Preferably, the S-shaped spring tooth and the arc surface opener are connected by connecting bolts.

Preferably, the spiral fertilizer conveyor adopts an outer groove wheel type setting.

(3) Beneficial effects

The adjustable topdressing machine provided by the utility model, on the one hand, can adjust the depth of topdressing according to the needs by setting the depth adjustment component; The device can be adjusted according to the row spacing of the densely planted crops that need to be topdressed, so as to ensure that the ditch is exactly at the required topdressing position of the crops; Reasonably choose the speed of fertilizer discharge. It can be seen that the adjustable topdressing machine of the utility model has the advantages of adjustable ditching depth, adjustable distance between spring tooth ditchers and adjustable topdressing amount, that is to say, the operator can reasonably select the ditching depth and opening The distance between rows of furrows solves the problem that intertillage topdressing machines are not suitable for densely planted crops due to large soil disturbances, so that the topdressing of densely planted crops can be mechanized; at the same time, the amount of topdressing fertilizer is controllable and the fertilizer is applied in the ditch, which solves the problem of uneven topdressing and inability to press The problem of topdressing is also avoided, and the waste of fertilizer and the pollution of the environment are avoided.

In addition to the technical problems solved by the utility model described above, the technical features of the technical solutions formed and the advantages brought by the technical features of these technical solutions, other technical features of the utility model and the advantages brought by these technical features The advantages will be further explained in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the front view of the adjustable top dressing machine of the utility model embodiment;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is a schematic diagram of the depth adjustment assembly of the adjustable fertilizer dressing machine according to the embodiment of the present invention;

Fig. 4 is the front view of the elastic tooth holder of the adjustable topdressing machine according to the embodiment of the utility model;

Fig. 5 is the left view of Fig. 4;

FIG. 6 is a top view of FIG. 4 .

In the figure: 1: Suspension assembly; 2: Rack; 3: Depth adjustment assembly, 301: Fastener, 302: Height adjustment handle, 303: Depth gauge wheel; 4: Elastic tooth ditching assembly, 401: Elastic tooth fixation Device, 401a: upper fixing plate, 401b: lower fixing plate, 401c: U-bolt, 402: curved surface opener, 403: connecting bolt, 404: S-shaped spring tooth; 5: topdressing component, 50: fertilizer box, 501: driving wheel, 502: chain, 503: driven wheel, 504: spiral fertilizer discharger, 505: rotary fertilizer discharge shaft, 506: fertilizer pipe.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, in the description of the present utility model, unless otherwise specified, the meanings of "multiple", "multiple roots" and "multiple groups" are two or more, "several", "several roots", "several "Several groups" means one or more than one.

As shown in Figures 1 and 2, the adjustable topdressing machine provided by the embodiment of the utility model includes a frame 2, a suspension assembly 1, a depth adjustment assembly 3, a plurality of elastic teeth ditching assemblies 4 and a topdressing assembly 5.

Wherein, the suspension assembly 1 is a mechanism that connects the overall adjustable top dressing machine with the power tractor, that is, the adjustable top dressing machine in this embodiment is connected with the power tractor through the suspension assembly. Frame 2 is the support structure of each component, and it comprises a horizontally arranged elongated crossbeam, and said suspension assembly is arranged on the front top of said frame 2 and is connected and fixed with said frame 2, and said depth-limiting assembly 3 are arranged at the two ends of the crossbeam (that is, the lower two sides of the suspension assembly), and a plurality of elastic tooth ditching assemblies 4 are arranged at the middle part of the crossbeam at intervals, and the main components of the topdressing assembly 5 are all arranged on the front of the crossbeam of the frame. above.

As shown in FIGS. 1 and 2 , specifically, the depth adjustment assembly 3 includes two depth-gauge wheels 303 and a height-adjustment handle 302 rotatably connected to the axles of the depth-gauge wheels 303 . The two depth-limiting wheels 303 are arranged symmetrically under the two ends of the crossbeam of the frame 2, and are respectively fixed on the two ends of the crossbeam by the height adjustment handles 302 respectively connected. Wherein, the fixed position of the height adjustment handle 302 and the frame beam can be adjusted, and the height of the depth-limiting wheel from the frame is adjusted accordingly, thereby realizing the adjustment of the trenching depth.

Each spring tooth ditching assembly 4 includes an S-shaped spring tooth 404 and an arc groove opener 402 detachably connected up and down, and each of the S-shaped spring teeth 404 is fixed at a detachable distance by a spring tooth holder 401 Between the two ends of the frame beam (between the two ends of the frame beam refers to the position where the frame beam is located between the two height adjustment handles 302), each of the curved openers 402 and the The S-shaped spring teeth 404 correspond one to one and are arranged below the S-shaped spring teeth 404 . Wherein, the specific setting of the spacing of each S-shaped spring tooth 404 can be arranged on the frame according to the requirement of wheat row spacing.

The topdressing assembly 5 includes a fertilizer box 50 fixed on the top of the frame beam, and the fertilizer box 50 is provided with an adjustable fertilizer outlet provided with a spiral fertilizer discharger 504 corresponding to each spring tooth ditching assembly. A fertilizer discharge pipe 506 is connected to the fertilizer discharge port, and the discharge port end of the fertilizer discharge pipe 506 is arranged on the side of the lower part of the S-shaped spring tooth 404 away from the arc surface ditch opener 402 .

The ditching depth of the adjustable fertilizer dressing machine in this embodiment is adjustable: since the height of the elastic tooth ditching assembly 4 is fixed, when the height adjustment handle 302 is fixed at a higher position with the frame 2 crossbeam, the depth-limiting wheel 303 and The distance between the frames 2 is relatively large, and at this time, the distance between the spring tooth ditching assembly 4 above the ground is relatively large (the distance between the depth gauge wheel and the frame is consistent with the height above the ground of the spring tooth ditching assembly), The corresponding ditching depth is shallow; on the contrary, when the lower position of the height adjustment handle 302 is fixed to the crossbeam of the frame 2, the distance between the depth-limiting wheel 303 and the frame 2 is relatively large, and the elastic tooth ditching assembly 4 The smaller the distance above the ground, the corresponding deeper the trenching depth.

In this embodiment, the distance between the spring tooth ditching components 4 of the fertilizer topdressing machine can be adjusted: open the spring tooth holder 401, and move the S-shaped spring tooth 404 and the arc surface ditch opener 402 to the appropriate position of the frame 2 beam , and then use the spring tooth holder 401 to fix the S-shaped spring tooth 404 to complete a distance adjustment.

The amount of top dressing of the adjustable top dressing machine in this embodiment is adjustable: the fertilizer is put into the top dressing box 50 uniformly, and the amount of fertilizer output is controlled through the adjustable fertilizer outlet corresponding to each spring tooth ditching assembly 4 .

In this embodiment, the trenching depth of the adjustable fertilizer topdressing machine can be adjusted, so that various crops can be trenched and topdressed, especially it has a shallow trenching method, which solves the problem of large soil disturbance of the intertillage topdressing fertilizer machine, and can be applied to Wheat and other dense planting as topdressing; the distance between the spring tooth ditching components 4 can be adjusted, which can be applied to simultaneous topdressing of multiple rows of densely planted crops with different row spacing, which improves the efficiency and solves the problem that the different row spacing of crops cannot be used. The problem of mechanized topdressing; the amount of topdressing can be adjusted according to the density of crops and the specific amount of fertilizer required, avoiding the waste of fertilizer.

The adjustable topdressing machine in this embodiment can freely adjust the ditching position and ditching depth horizontally and vertically, so as to meet the topdressing requirements of densely planted crops such as wheat under different planting methods. On the one hand, it saves manpower and improves the operation efficiency. On the other hand, it allows the topdressing of densely planted crops to be directly applied to the ground, avoiding the waste of fertilizers on the surface, and correspondingly avoiding the pollution of the environment caused by topdressing.

As shown in FIG. 1 , as a preferred embodiment, the rotating fertilizer shafts 505 of each spiral fertilizer device 504 are arranged coaxially. The transmission of the spiral fertilizer device 504 is driven by the depth-gauge wheel 303 . Specifically, the depth-limiting wheel 303 is coaxially provided with a driving wheel 501 , and the rotating fertilizer shaft 505 of the spiral fertilizer discharger 504 is provided with a driven wheel 503 , and a chain 502 is provided between the driving wheel 501 and the driven wheel 503 .

The driving wheel 501 is coaxial with the depth-limiting wheel 303, and the corresponding driving wheel 501 rotates when the depth-limiting wheel 303 rotates, thereby driving the driven wheel 503 to rotate through the chain 502; shaft, so when the driven wheel 503 rotates, the screw fertilizer device 504 also starts to rotate and discharge fertilizer. That is, the depth-limiting wheel 303 is also used as a transmission wheel to provide power for the fertilizer discharge assembly except for the depth-limiting function. The depth-limiting wheel 303 transmits power to the rotary fertilizer discharge shaft 505 through the driving wheel 501 and the driven wheel 503, and the rotary fertilizer discharge shaft The spiral fertilizer device 504 on the 505 discharges the fertilizer from the fertilizer box 50, and falls into the fertilizer ditch that the elastic tooth ditching assembly 4 opens.

The driving wheel 501 and the depth-limiting wheel 303 are coaxially installed, and the power is transmitted to the fertilizer discharge assembly 5 through the transmission chain 502. On the one hand, it ensures that the fertilizer will fall at the same time when the topdressing machine advances and ditches, without additional settings or Manually control the synchronization of topdressing and ditching; on the other hand, the coaxial arrangement of the rotating fertilizer shaft 505 of each spiral fertilizer device 504 also ensures that the fertilizer output rate of each fertilizer outlet is close to the same.

Simultaneously, adopt the form that driving wheel 501 drives driven wheel 503, also can adopt the mode of replacing driven wheel 503 to further adjust the amount of topdressing fertilizer when required fertilization quantity exceeds the fertilizer adjustment amount of adjustable fertilizer outlet, specifically, driving wheel When 501 was fixed, the smaller the diameter of the driven wheel 503, the faster the fertilizer discharge speed.

As shown in Figure 3, as a preferred embodiment, each depth gauge wheel 303 is rotatably fixed by two height adjustment handles 302, and the two height adjustment handles 302 are symmetrically arranged on the left and right sides of the depth gauge wheel 303 respectively, And the two height adjustment handles 303 are respectively fixed on the frame crossbeam through the fasteners 301 with scales.

Specifically, as shown in FIG. 3 , as an optional form of the fastener 301, the fastener includes two fastening plates and bolts matched with the two fastening plates, wherein the height adjustment handle 302 is set Between the two fastening plates, bolt holes are provided on the left and right sides of the fastening plates, the bolt holes on the same side of the two fastening plates are aligned, and the bolts pass through the bolts on the same side of the two fastening plates in turn hole.

Using the fasteners of the above mechanism, by adjusting the corresponding positions of the height adjustment handle 302 and the scale on the fastener 301, the depth gauge wheel 303 can be moved up and down to change the height of the elastic tooth opener 402 relative to the ground, thereby controlling Top dressing depth. Simultaneously, the depth-limiting wheel 303 on one side is fixed by two height adjustment handles 302, which enhances the intensity of the depth-limiting wheel 303, making the depth-limiting wheel 303 more stable as an operation walking support.

As shown in 4, 5 and 6, a kind of specific structure of the spring tooth holder 401 can be a U-shaped card, which includes an upper fixing plate 401a, a lower fixing plate 401b and the upper fixing plate 401a and the lower fixing plate 401b. Fitting two U-bolts 401c.

Wherein, the upper fixing plate 401a and the lower fixing plate 401b are aligned up and down and arranged on the upper and lower ends of the frame respectively, and the widths of both ends of the upper fixing plate 401a and the lower fixing plate 401b are larger than the The width of the frame 2, the width of the upper fixing plate 401a and the lower fixing plate 401b and the two ends of the frame are respectively provided with two bolt holes aligned up and down, and the distance between the two bolt holes on the same side It is consistent with the width between the two vertical bolts of the U-bolt 401c. The middle section of the upper fixing plate 401a protrudes upwards, the middle section of the lower fixing plate 401b protrudes downwards, and the upper half curved section of the S-shaped spring tooth 404 is wound around the beam of the frame and passes through Between the protrusion of the middle section of the upper fixing plate 401a and the upper end surface of the frame beam and between the protrusion of the middle section of the lower fixing plate 401b and the lower end surface of the frame beam, the two U-bolts 401c respectively pass through the two fixing plates in turn. Bolt holes on the same side of the plate.

Adopt above-mentioned spring tooth fixer, S-shaped spring tooth 404 is installed on the frame by U-shaped bolt 401c and upper and lower fixing plate, when needing to adjust the horizontal position of spring tooth ditching assembly 4, loosen U-shaped bolt 401c, will The spring teeth fixer 401 and the S-shaped spring teeth 404 move left and right simultaneously to adjust the line spacing.

As a preferred manner, the suspension assembly 1 is a three-point suspension, and the three support walls of the three-point suspension are all welded to the frame. The three-point suspension facilitates the connection and disassembly of the adjustable top dressing machine of this embodiment with the power tractor.

As a preferred manner, the S-shaped spring tooth 404 and the arc surface opener 402 of the adjustable topdressing machine in this embodiment are connected by connecting bolts 403 . The connecting bolt 403 connects the S-shaped elastic tooth 404 and the arc surface opener 402 to have a safety effect. When the topdressing operation encounters a large resistance such as a stone, the connecting bolt 403 is automatically cut off to ensure that other parts are not damaged. In specific use, the S-shaped spring tooth 404 can be selected from the Type 1 S-shaped spring tooth in the ISO5678 standard. The cross-sectional contour line of the contact surface of the arc opener 402 and the S-shaped spring tooth 404 is a circular arc with a radius of 20mm. The arc angle is 110°, and a 12mm diameter bolt counterbore is drilled at the connection end.

Specifically, as a preferred manner, the spiral fertilizer device adopts an outer groove wheel type setting.

In summary, the adjustable top dressing machine according to the embodiment of the utility model can freely adjust the ditching position and ditching depth horizontally and vertically, so as to meet the topdressing requirements of dense crops such as wheat under different planting methods. Compared with the prior art, the adjustable fertilizer topdressing machine of the utility model is more suitable for surface operations such as sticky soil and no-tillage planting, and topdressing has the function of increasing the production of wheat at the turning green stage. Compared with manual fertilizer spreading and mechanical spreading Fertilizers reduce the amount of chemical fertilizers, improve fertilizer utilization, and reduce production costs.

At the same time, the adjustable topdressing machine in the embodiment of the utility model is not limited to the topdressing of dense crops, and is also suitable for the use of topdressing in intertillage crops. So it has better applicability than the cultivator top dressing machine.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (10)

1. An adjustable topdressing machine, characterized in that: it includes a frame, a suspension assembly, a depth adjustment assembly, a plurality of elastic tooth ditching assemblies and a topdressing assembly; The frame includes a beam, and the suspension assembly is arranged on the upper front of the frame and is connected and fixed with the frame; The depth adjustment assembly includes two depth-gauge wheels symmetrically arranged below the two ends of the crossbeam, the axle of each depth-gauge wheel is connected with a height adjustment handle, and the height adjustment handle is fixed on both ends of the crossbeam; The plurality of spring tooth ditching assemblies are arranged on the beam at intervals, each of the spring tooth ditching assemblies includes S-shaped spring teeth and arc surface openers that are detachably connected up and down, wherein the S The S-shaped spring tooth and the frame are detachably fixed on the beam through the spring tooth holder, and the curved surface opener is arranged below the S-shaped spring tooth; The topdressing assembly includes a fertilizer box arranged above the frame, and the fertilizer box is provided with an adjustable fertilizer outlet provided with a spiral fertilizer discharger corresponding to each spring tooth ditching assembly, and the adjustable fertilizer outlet is connected to There is a fertilizer discharge pipe, and the discharge port end of the fertilizer discharge pipe is arranged on the side of the lower part of the S-shaped spring teeth away from the arc surface opener. 2. The adjustable top dressing machine according to claim 1, characterized in that: the rotary fertilizer shafts of each spiral fertilizer device are coaxially arranged; The rotating fertilizer shaft is driven to rotate by a transmission mechanism connected with the depth-gauge wheel. 3. The adjustable top dressing machine according to claim 2, characterized in that: the transmission mechanism includes a driving wheel coaxially arranged with the depth-gauge wheel, a driven wheel arranged on the rotating fertilizer shaft and a connecting wheel The chain between the driving wheel and the driven wheel. 4. The adjustable top dressing machine according to claim 1, characterized in that: the suspension assembly is a three-point suspension, and the three support walls of the three-point suspension are all welded to the frame. 5. The adjustable top dressing machine according to claim 1, characterized in that: two said height adjustment handles are connected to the axle of each said depth-gauge wheel, and the two said height adjustment handles are symmetrically arranged on said On the left and right sides of the depth gauge wheel, the two height adjustment handles are respectively fixed on the crossbeam by fasteners. 6. The adjustable topdressing machine according to claim 5, characterized in that: the fastener is provided with a scale along its vertical upper edge. 7. The adjustable topdressing machine according to claim 6, characterized in that: the fasteners include two fastening plates and bolts matched with the two fastening plates, wherein the height adjustment handle is arranged on the two fastening plates Between the plates, bolt holes are provided on the left and right sides of the fastening plates, the bolt holes on the same side of the two fastening plates are aligned, and the bolts pass through the bolt holes on the same side of the two fastening plates in turn. 8. The adjustable topdressing machine according to claim 1, characterized in that: the spring tooth holder comprises an upper fixing plate, a lower fixing plate and two U-shaped bolts matched with the upper fixing plate and the lower fixing plate ; Wherein, the upper fixing plate and the lower fixing plate are aligned up and down and respectively arranged on the upper and lower ends of the frame beam, and the width of both ends of the upper fixing plate and the lower fixing plate is larger than that of the frame The width of the beam, the width of the upper fixing plate and the lower fixing plate, and the two ends of the frame beam are respectively provided with two bolt holes aligned up and down, and the distance between the two bolt holes on the same side is the same as the The width between the two vertical bolts of the U-shaped bolts is consistent; The middle section of the upper fixed plate protrudes upwards, the middle section of the lower fixed plate protrudes downwards, and the upper half curved section of the S-shaped spring tooth is wound on the frame beam and passes through the upper fixed plate. Between the protrusion of the middle section and the upper end surface of the frame crossbeam and between the protrusion of the middle section of the lower fixing plate and the lower end surface of the frame crossbeam, the two U-shaped bolts respectively pass through the same-side bolt holes of the two fixing plates in sequence. 9. The adjustable topdressing machine according to any one of claims 1-8, characterized in that: the S-shaped spring teeth and the arc surface opener are connected by connecting bolts. 10. The adjustable topdressing machine according to any one of claims 1-8, characterized in that: the spiral fertilizer device is arranged in the form of an outer grooved wheel.