Farming machine capable of cleaning stubbles on seedbed and performing deep scarification

Abstract

The invention provides a farming machine capable of realizing seedbed stubble cleaning and deep scarification, belongs to the technical field of farming machinery, and solves the technical problems that a farming machine cannot treat plant stubbles and is poor in deep soil hardening repair effect. Comprising a rotary tillage rack, a power shaft, a shallow ploughing shaft, a deep ploughing shaft and a filtering frame. The shallow ploughing shaft and the deep ploughing shaft are arranged in the rotary tillage rack in the width direction, the shallow ploughing shaft is arranged in front of the deep ploughing shaft and higher than the deep ploughing shaft on the rear side, and the shallow ploughing shaft and the deep ploughing shaft are both connected with the power shaft and provided with rotary tillage blades. The filter frame comprises plough blades and filter grids, the plough blades incline towards the forward direction, the blade structure is located in the rear lower area of the rotary tillage blades of the shallow tillage shaft, and the two sides of the blade structure are fixed to the rack. The filtering grid is obliquely arranged, the low end is connected with the high end of the plough blade, the filtering grid extends backwards to the position above the rotary tillage blade of the deep ploughing shaft or extends horizontally or backwards to continuously extend beyond the area, and the rear side of the filtering grid is a stubble collecting area. The method has the technical effects of being high in stubble removing effect, good in soil hardening repairing effect and capable of promoting improvement of soil breathability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery, in particular to an agricultural machine for cleaning up residue in seedbed and deep ploughing. BACKGROUND

[0002] Agricultural machinery is a key equipment in agricultural production, which is usually pulled by a tractor to travel on a seedbed and break the soil in the passing area through the rotating blades arranged on the frame, thereby completing the ploughing and land preparation and other work links. This work mode can effectively improve the surface structure of the soil and create suitable conditions for subsequent seeding, and plays an important role in the traditional agricultural mode.

[0003] The existing agricultural machinery gradually exposes technical limitations in actual application. The rotary ploughing design mainly aims at breaking the shallow soil, and the improvement ability of the deep soil below the ploughing layer is insufficient, and there is no special treatment mechanism for plant residue. This structure leads to the problem that the deep soil compaction cannot be effectively repaired, and the large crop straw and root system left on the ground cannot be effectively cleaned up, which affects the subsequent ploughing effect. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides an agricultural machine for cleaning up residue in seedbed and deep ploughing, which solves the technical problems that the existing agricultural machine cannot handle plant residue and the deep soil compaction repair effect is poor.

[0005] The technical scheme adopted by the present application is as follows: an agricultural machine for cleaning up residue in seedbed and deep ploughing, comprising: a rotary ploughing frame, a power shaft, a shallow ploughing shaft, a deep ploughing shaft and a filter frame; The shallow ploughing shaft and the deep ploughing shaft are arranged inside the rotary ploughing frame along the width direction of the rotary ploughing frame, the shallow ploughing shaft is located at the front side of the rotary ploughing frame, the deep ploughing shaft is located at the rear side of the rotary ploughing frame, the shallow ploughing shaft is also higher than the deep ploughing shaft, the shallow ploughing shaft and the deep ploughing shaft are connected with the power shaft and obtain power, and the shallow ploughing shaft and the deep ploughing shaft are both provided with rotary ploughing blades; The filter frame comprises a plough blade and a filter grid, the plough blade is arranged obliquely towards the advancing direction of the agricultural machine, the low end side of the plough blade is provided with a blade edge structure, the blade edge structure is located in the lower rear area of the rotary ploughing blade of the shallow ploughing shaft, the plough blade is fixed on both sides of the rotary ploughing frame along the width direction, the filter grid is also arranged obliquely, the low end of the filter grid is connected to the high end of the plough blade, the filter grid extends rearward along the oblique direction of the plough blade to the area above the rotary ploughing blade of the deep ploughing shaft, changes the angle to be horizontal or oblique to the rear side of the agricultural machine and continues to extend beyond the area above the rotary ploughing blade of the deep ploughing shaft, and the rear side of the filter grid is a residue collection area.

[0006] Optionally, the filter grid comprises a plurality of parallel fixed grid bars, filter grooves being formed between adjacent fixed grid bars, and a grid shaft connected to both sides of the rotary tillage frame is arranged at a rear upper region of the rotary tillage blade.

[0007] Optionally, the tail end of the fixed grid bar is rotationally connected to the grid shaft, and the filter grid further comprises a plurality of parallel movable grid bars, the movable grid bars being arranged between two adjacent fixed grid bars, the tail end of the movable grid bar being fixedly connected to the grid shaft, and the head end being a free end, the head end of the movable grid bar being capable of being lapped onto the high end of the plow blade or being rotated to outside the rotary tillage frame during rotation of the grid shaft.

[0008] Optionally, a stubble cleaning shaft is further included, the stubble cleaning shaft being parallel to the shallow tillage shaft and the deep tillage shaft, the stubble cleaning shaft being arranged at an intermediate region of the shallow tillage shaft and the deep tillage shaft and above a forwardly inclined region of the filter grid, a plurality of radial stubble cleaning rods being arranged on the stubble cleaning shaft, the stubble cleaning rods being distributed along the circumference and the axial direction of the stubble cleaning shaft, the stubble cleaning rods passing through the grid grooves of the filter grid during rotation of the stubble cleaning shaft, and an arc-shaped cover of a top housing of the rotary tillage frame covering a rotating region of the stubble cleaning rods.

[0009] Optionally, the stubble cleaning rods are cylindrical in cross section, or the stubble cleaning rods are blade-shaped on one side along the direction of rotation.

[0010] Optionally, the rotation direction of the shallow tillage shaft is consistent with the forward direction of the agricultural tillage machine, and the rotation direction of the stubble cleaning shaft is opposite to that of the shallow tillage shaft.

[0011] Optionally, the rotary tillage frame comprises a frame body and a frame top cover, the rear end of the frame top cover being hingedly connected to the frame body, and the frame top cover being capable of being flipped open, a mounting groove being arranged on the frame body, both ends of the stubble cleaning shaft being detachably connected to the mounting groove through fastening plates and bolts, and the mounting groove extending to the edge of the frame body.

[0012] Optionally, a flattening plate is arranged at the tail end of the rotary tillage frame, the upper end of the flattening plate being hingedly connected to the tail end of the rotary tillage frame, and a limiting platform limiting the maximum flipping angle of the flattening plate being further arranged at the tail end of the rotary tillage frame.

[0013] Optionally, the deep plowing shaft comprises a shaft body and a bearing seat plate; the bearing seat plate is arranged at both ends of the shaft body and connected with the shaft body through bearings, and a connecting slot hole penetrating in the axial direction is arranged on the bearing seat plate; an adjusting slot for mounting the shaft body is arranged on the side plate of the rotary plowing frame, mounting screw holes are arranged on both sides of the adjusting slot, and the bearing seat plate and the shaft body can be adjusted in position along the adjusting slot and fixed in position through the connecting slot hole and the mounting screw hole; the adjusting slot is arranged vertically or obliquely.

[0014] Optionally, the shallow plowing shaft and the deep plowing shaft are synchronized in power through a synchronous belt or a synchronous chain; the synchronous belt or the synchronous chain also passes through a tensioning wheel, the tensioning wheel is also mounted on the side plate of the rotary plowing frame through a bearing seat plate, and the position of the tensioning wheel can also be adjusted to adapt to the change in the tensioning degree of the synchronous belt or the synchronous chain caused by the depth adjustment of the deep plowing shaft.

[0015] From the above technical solution, the beneficial technical effects of the present application are as follows: The agricultural plowing machine realizes the collaborative operation of the surface layer residue crushing and the deep layer soil loosening through the layered layout design of the shallow plowing shaft and the deep plowing shaft, effectively peels off and guides the soil through the blade structure of the front-end plow blade, and separates the soil and the residue at the filter grid, so that the residue is transported to the collection area through the inclined grid, and the residue removal efficiency is significantly improved; at the same time, the deep plowing shaft deeply crushes the hardened layer, forms a three-dimensional working space in cooperation with the filter frame, removes obstacles while improving the soil pore structure, and systematically improves the soil permeability, thereby creating a high-quality soil environment for crop root growth. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional state.

[0018] Figure 2 It is a schematic diagram of the overall top view.

[0019] Figure 3 It is Figure 2 A-A sectional view.

[0020] Figure 4 It is a schematic diagram of the clear residue shaft and the deep plowing shaft region without cover from the top view.

[0021] Figure 5 It is a schematic diagram of the overall bottom view.

[0022] Figure 6 Fig. 1 is a schematic diagram of a rotary tiller blade and its installation on the shaft.

[0023] Figure 7 Fig. 2 is a schematic diagram of the whole body in a three-dimensional coverless state from the top.

[0024] Figure 8 Fig. 3 is a schematic diagram of a filter frame and its grid.

[0025] Reference signs: rack top cover 11, installation groove 12, smoothing plate 13, limiting table 14, adjusting groove 15, tensioning wheel 16, power shaft 2, shallow plowing shaft 3, deep plowing shaft 4, bearing seat plate 41, connecting groove hole 42, plow blade 51, blade structure 511, fixed grid strip 521, grid shaft 522, movable grid strip 523, stubble collection area 53, clean stubble shaft 6, clean stubble rod 61, fastening plate 62, rotary tiller blade 7, synchronous belt 8. DETAILED DESCRIPTION

[0026] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the skilled person in the field to which the present application belongs.

[0028] A kind of agricultural machine for cleaning seedbed stubble and deep plowing, please refer to the accompanying drawings Figures 1-3 , a possible implementation manner is as follows, including: Rotary tiller frame, power shaft 2, shallow plowing shaft 3, deep plowing shaft 4 and filter frame, rotary tiller frame includes two side plates, top plate and necessary reinforcing structure, rotary tiller frame front side also has connecting arm and transmission arm, connecting arm is used to hang on the tractor, transmission arm is used to connect power and drive power shaft 2 to rotate, then shallow plowing shaft 3 and deep plowing shaft 4 are driven by power shaft 2; Shallow plowing shaft 3 and deep plowing shaft 4 are arranged in the rotary tiller frame along the width direction of the rotary tiller frame, refer to Figure 3 , shallow plowing shaft 3 is located at the front side of the rotary tiller frame ( Figure 3 left side), deep plowing shaft 4 is located at the rear side of the rotary tiller frame, shallow plowing shaft 3 is also higher than deep plowing shaft 4, shallow plowing shaft 3 and deep plowing shaft 4 are connected with power shaft 2 and obtain power, shallow plowing shaft 3 and deep plowing shaft 4 are both provided with rotary tiller blade 7, rotary tiller blade 7 is prior art, which is not the core improvement point of the present application; Filter frame, refer to Figure 8 and Figure 3, including a plow blade 51 and a filter grid, the plow blade 51 is arranged obliquely towards the advancing direction of the agricultural machine, the low end side of the plow blade 51 is provided with a blade structure 511 for plowing soil, the blade structure 511 is located at the lower rear area of the rotary tillage blade 7 (rotation area) of the shallow tillage shaft 3, the plow blade 51 is fixed on both sides of the rotary tillage frame in the width direction, the filter grid is also arranged obliquely, the low end of the filter grid is connected to the high end of the plow blade 51, the filter grid extends rearward along the oblique direction of the plow blade 51 to the area above the rotary tillage blade 7 of the deep tillage shaft 4, then changes the angle to be horizontal or oblique to the rear side of the agricultural machine and continues to extend beyond the area above the rotary tillage blade 7 of the deep tillage shaft 4, and the rear side of the filter grid is a residue collection area 53.

[0029] In the above embodiment, the working process of the device is that the device is suspended at the rear end of the tractor, and the tractor pulls the device to pass over the seedbed. Referring to Figure 3 In this process, the surface soil is cut and crushed into small blocks by the rotary tillage blade 7 of the shallow tillage shaft 3, and as the device as a whole moves forward with the tractor, the plow blade 51 at the lower side of the shallow tillage shaft 3 scoops up the just-cut and crushed protrusions and guides them rearward and upward along the oblique angle. For smaller plant residues / roots in the soil, they can directly pass through the filter grid and fall to the rear, and for larger plant residues / roots, they will not be able to fall to the rear of the filter grid, and as the device moves forward, the larger plant residues / roots are continuously pushed backward, and because the soil density is greater than the residues and the soil can pass through the grid, the residues will accumulate on the surface, thereby reaching the residue collection area 53. In addition, the crushed surface soil will fall to the upper side of the deep tillage shaft 4 after passing through the filter grid, and when the deep tillage shaft 4 breaks up the deep soil, it will turn the lower soil to the surface and turn the surface soil to the lower layer, thereby achieving the exchange of surface soil and deep soil and ensuring the breaking of the deep soil.

[0030] In the above embodiment, the agricultural machine realizes the organic integration of residue cleaning and deep loosening through structural innovation. When working, the device is suspended at the rear end of the tractor through the connecting arm, and the power is transmitted to the power shaft through the transmission arm to drive the shallow tillage shaft and the deep tillage shaft to operate synchronously. The rotary tillage blade of the shallow tillage shaft first breaks up the surface soil, and the plow blade arranged below uses the oblique structure and blade design to guide the broken soil blocks and the mixed residues rearward and upward, forming a preliminary separation: small residues pass through the gaps of the filter grid, while larger residues are continuously pushed to the rear end collection area on the surface of the grid (the soil in the field is soft, the residues and the soil are easy to separate, and the density and volume of the residues are much smaller than those of the soil particles), achieving the classification of residues. At the same time, the rotary tillage blade of the deep tillage shaft turns and breaks up the deep soil, and its working area covers the lower side of the extension section of the rear end of the filter grid, so that the filtered surface soil and the broken deep soil are exchanged in position during the turning and breaking process. This layered operation mode not only improves the residue removal rate through the cooperation of the plow blade and the filter grid, but also effectively improves the hardening state of the deep soil by using the turning effect of the deep tillage shaft.

[0031] In the above embodiments, the plough blade 51 is also inclined towards the direction of the agricultural machine's advancement, which also forms a downward pressure. Specifically, during the process of the tractor pulling the device forward, the inclined plough blade 51 has a tendency to drill downwards, so that the device can always penetrate into the soil and will not float on the surface of the seedbed during the rotary tillage process.

[0032] In a possible implementation, referring to the accompanying drawings, Figure 8 The filter grid comprises a plurality of parallel fixed grid bars 521, and filter grooves are formed between adjacent fixed grid bars 521. The area above the rotary tillage blade 7 of the deep tillage shaft 4 is provided with a grid shaft 522 connected to the two sides of the rotary tillage frame. The head end of the fixed grid bar 521 is fixedly (e.g. welded) connected to the high end of the plough blade 51, and the tail end of the fixed grid bar 521 is connected to the grid shaft 522. The distance of the fixed grid bar 521 can be set as required. In order to increase the structural stability and filtering effect, a connecting bar can also be arranged in the width direction of the device to connect the fixed grid bars 521, so as to divide the strip-shaped filter groove space into a grid shape. The filter groove structure is formed by a plurality of parallel fixed grid bars, the head end of which is fixed to the high end of the plough blade, and the tail end is connected to the two sides of the frame through the grid shaft, forming a stable inclined conveying and filtering channel. By adjusting the distance between the grid bars, the size of the residue filtering can be flexibly controlled. The strip-shaped filter groove is divided into a grid shape by the transverse connecting bar, which not only enhances the overall anti-deformation ability of the grid, but also avoids the leakage of slender residues through the grid, ensures that the residues are fully filtered during the conveying process, and improves the residue separation efficiency and tillage reliability.

[0033] In a possible implementation, the tail end of the fixed grid bar 521 is rotationally connected to the grid shaft 522. The filter grid further comprises a plurality of parallel movable grid bars 523, which are located between adjacent two fixed grid bars 521. The tail end of the movable grid bar 523 is fixedly connected to the grid shaft 522, and the head end is a free end. During the rotation of the grid shaft 522, the head end of the movable grid bar 523 can be lapped on the high end of the plough blade 51 or rotated to the outside of the rotary tillage frame. The role of the movable grid bar 523 is to dynamically adjust the width of the filter groove. When the head end of the movable grid bar 523 is lapped on the high end of the plough blade 51, the width of the filter groove becomes half of the original. Its role is to change the width of the groove in the rotary tillage site without making major changes to the device, and to adapt to different seedbeds (different seedbeds are used for planting different crops, and their tolerance to residues may be different).

[0034] In a possible implementation, referring to the accompanying drawings, Figure 3It also includes a stubble-cleaning shaft 6, which is parallel to the shallow tillage shaft 3 and the deep tillage shaft 4. The stubble-cleaning shaft 6 is located in the middle area between the shallow tillage shaft 3 and the deep tillage shaft 4 and above the forward-sloping area of ​​the filter grid. The stubble-cleaning shaft 6 is provided with radial stubble-cleaning rods 61 (radiating relative to the center of the shaft). The stubble-cleaning rods 61 are arranged in an array along the circumference and axial direction of the stubble-cleaning shaft 6. During the rotation of the stubble-cleaning shaft 6, the stubble-cleaning rods 61 pass through the grid grooves of the filter grid (at this time, connecting strips along the width direction of the device cannot be set to connect the grid strips). The top shell of the rotary tiller frame arcs over the rotation area of ​​the stubble-cleaning rods 61. Further, the stubble-cleaning rods 61 have a cylindrical cross-section, or the side of the stubble-cleaning rods 61 along their rotation direction is also a blade-shaped structure, that is, the stubble-cleaning rods 61 have a sharp edge along their rotation direction.

[0035] In the above embodiments, the addition of a stubble-cleaning shaft further optimizes the stubble treatment and soil breaking effect. The stubble-cleaning shaft is arranged parallel to the transition area between the shallow and deep tillage shafts. The array of stubble-cleaning rods mounted on it periodically inserts into the filter slots of the filter grid during rotation, creating a shearing effect that further breaks up the soil clods and stubble, enhancing soil filtration and preventing clogging. When a cylindrical stubble-cleaning rod is used, its circumferential surface can roll and compact the soil, effectively dispersing hardened soil clods. If a blade-shaped structure is used, the cutting action can enhance the crushing effect on the stubble. The arc-shaped top cover design not only prevents soil splashing during operation but also confines the crushing area of ​​the stubble-cleaning rods above the filter grid, ensuring that the crushed fine particles fall directly into the lower working area for further filtration and separation of stubble and soil.

[0036] In one possible implementation, see Appendix Figure 3 The rotation direction of the shallow tillage shaft 3 is the same as the forward direction of the tiller. Figure 3 (Counterclockwise), the rotation direction of the stubble clearing shaft 6 is opposite to that of the shallow tillage shaft 3. Figure 1 (Clockwise). When the shallow tillage shaft 3 rotates counterclockwise, the soil will be turned over backward and upward on the right rear side of the shallow tillage shaft 3. The plow blade 51 cooperates with it to guide the soil and continue to turn it upward and send it into the filter groove area of ​​the filter grid and the rotation area of ​​the stubble-cleaning shaft 6. The stubble-cleaning rod 61 of the stubble-cleaning shaft 6 randomly cuts and filters the soil. The broken soil falls directly through the filter grid. Larger stubble in the soil is sent to the stubble collection area 53 by the clockwise rotation of the stubble-cleaning rod 61 through the arc-shaped top cover area. In the upper rear area of ​​the stubble-cleaning shaft 6, the rotation of the stubble-cleaning shaft 6 also generates centrifugal force, which throws the stubble out of the range of the stubble-cleaning rod 61 and sends it to the stubble collection area 53.

[0037] In the above embodiment, by optimizing the steering cooperation and motion trajectory design of the stubble cleaning shaft and the shallow plowing shaft, an efficient soil stubble separation system is constructed. The shallow plowing shaft rotates counterclockwise in the same direction as the advancing direction, forming a continuous upward soil flow at the right lower rear, and the plow blade accurately guides the broken soil into the interaction area of the filter grid and the stubble cleaning shaft; at this time, the stubble cleaning shaft rotates in the opposite direction, which prolongs the soil overturning flow path, so that the soil is fully broken and filtered, and the reverse shearing force field is formed between the stubble cleaning rod and the shallow plowing shaft rotary plow blade, so that the soil is three-dimensionally broken under the double action force, significantly improving the dispersion efficiency of the hardened soil. In particular, the blade-shaped stubble cleaning rod not only crushes the stubble to below the specified particle size through the cutting action during clockwise rotation, but also uses the centrifugal force of rotation to throw the incompletely broken stubble along the arc-shaped inner wall of the top cover to the collection area, forming a continuous operation chain of "breaking-separating-transporting".

[0038] In a possible implementation, referring to the accompanying drawings Figure 1 The rotary tillage frame includes a frame body and a frame top cover 11, the rear end of the frame top cover 11 is hinged to the frame body, and the frame top cover 11 can be flipped open; the frame body is provided with a mounting groove 12, and the two ends of the stubble cleaning shaft 6 are detachably connected to the mounting groove 12 through a fastening plate 62 and bolts, and the mounting groove 12 extends to the edge of the frame body. In the above embodiment, the rotary tillage frame adopts an open-close design of hinging the frame body and the frame top cover, the rear end of the frame top cover can be flipped upward as a whole to form a wide maintenance channel, so that the core components such as the stubble cleaning shaft and the filter grid are completely exposed in the operation field of view. The bolt connection mode of the fastening plate and the mounting groove at both ends of the stubble cleaning shaft realizes quick disassembly and assembly: the design of extending the mounting groove to the edge of the frame body allows the stubble cleaning shaft to be taken out as a whole in the horizontal direction without the need to disassemble the surrounding transmission components; after the stubble cleaning shaft is taken out, the position of the movable grid strip 523 can also be adjusted more conveniently.

[0039] In a possible implementation, referring to the accompanying drawings ​ The rotary tillage frame tail end is provided with a smoothing plate 13, the upper end of the smoothing plate 13 is hinged to the tail end of the rotary tillage frame, and the tail end of the rotary tillage frame is also provided with a limiting table 14 limiting the maximum flipping angle of the smoothing plate 13. In the above embodiment, the hinged smoothing plate and the limiting table structure added to the tail end of the rotary tillage frame effectively improve the flatness and adaptability of the tillage operation. The hinged design of the upper end of the smoothing plate allows it to automatically float according to the soil undulation and maintain the best compacting angle under the constraint of the limiting table, which ensures sufficient compaction of the plowing layer and avoids excessive rolling that causes soil hardening.

[0040] In a possible implementation, the deep tillage shaft 4 comprises a shaft body and a bearing seat plate 41; the bearing seat plate 41 is arranged at both ends of the shaft body and connected with the shaft body through bearings, and the bearing seat plate 41 is provided with a connecting slot hole 42 penetrating in the axial direction, which is a large-diameter circular hole or a strip-shaped hole; on the side plate of the rotary tillage frame, an adjusting slot 15 for mounting the shaft body is arranged, and mounting screw holes are arranged on both sides of the adjusting slot 15; the bearing seat plate 41 and the shaft body can be adjusted in position along the adjusting slot 15 and fixed in position through the connecting slot hole 42 and the mounting screw holes; the adjusting slot 15 is arranged vertically or obliquely. The shallow tillage shaft 3 and the deep tillage shaft 4 are synchronously powered through a synchronous belt 8 or a synchronous chain; the synchronous belt 8 or the synchronous chain also passes through a tensioning wheel 16, which is also mounted on the side plate of the rotary tillage frame through the bearing seat plate 41 and can also be adjusted in position (principle diagram of the deep tillage shaft 4) to adapt to the change in the tensioning degree of the synchronous belt 8 or the synchronous chain caused by the depth adjustment of the deep tillage shaft 4.

[0041] The corresponding adjusting slot 15 on the side plate of the rotary tillage frame cooperates with the connecting slot hole 42, so that the bearing seat plate 41 can drive the shaft body to slide along the adjusting slot 15, thereby adjusting the depth of turning over the soil of the deep tillage shaft; the vertical or oblique arrangement of the adjusting slot 15 further enhances the flexibility of the adjustment. After adjustment, the position of the deep tillage shaft can be stably fixed through the connecting slot hole 42 and the mounting screw holes on both sides of the adjusting slot 15.

[0042] At the same time, the shallow tillage shaft 3 and the deep tillage shaft 4 are synchronously powered through the synchronous belt 8 or the synchronous chain, ensuring that the two work in coordination. The introduction of the tensioning wheel 16 effectively solves the problem of the change in the tension of the synchronous belt 8 or the synchronous chain caused by the depth adjustment of the deep tillage shaft 4, ensuring the stability and reliability of the power transmission. This design not only improves the working efficiency of the agricultural tillage machine, but also optimizes the soil structure by precisely adjusting the depth of turning over the soil, creating a more favorable environment for crop growth, and has significant economic and ecological benefits.

[0043] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and description of the present application.

Claims

1. A farm tiller for performing cleaning of seedbed stubbles and subsoiling, characterized in that, It comprises: a rotary tiller frame, a power shaft (2), a shallow tillage shaft (3), a deep tillage shaft (4) and a filter frame; The shallow tillage shaft (3) and the deep tillage shaft (4) are arranged inside the rotary tiller frame along the width direction of the rotary tiller frame, the shallow tillage shaft (3) is located at the front side of the rotary tiller frame, the deep tillage shaft (4) is located at the rear side of the rotary tiller frame, and the shallow tillage shaft (3) is also higher than the deep tillage shaft (4), both the shallow tillage shaft (3) and the deep tillage shaft (4) are connected with the power shaft (2) and powered, and both the shallow tillage shaft (3) and the deep tillage shaft (4) are provided with rotary tillage blades (7); The filter frame comprises a plow blade (51) and a filter grid, the plow blade (51) is arranged obliquely towards the advancing direction of the agricultural tiller, the low end side of the plow blade (51) is provided with a blade edge structure (511), the blade edge structure (511) is located at the lower rear area of the rotary tillage blade (7) of the shallow tillage shaft (3), both sides of the plow blade (51) are fixed to both sides of the rotary tiller frame in the width direction, and the filter grid is also arranged obliquely, the low end of the filter grid is connected to the high end of the plow blade (51), the filter grid extends rearward along the oblique direction of the plow blade (51) to an area above the rotary tillage blade (7) of the deep tillage shaft (4), changes the angle to be horizontal or oblique to the rear side of the agricultural tiller and continues to extend beyond the area above the rotary tillage blade (7) of the deep tillage shaft (4), and the rear side of the filter grid is a residue collection area (53).

2. The agricultural tiller for cleaning seedbed residue and deep scarification according to claim 1, wherein: The filter grid comprises a plurality of fixed grid bars (521) arranged in parallel, filter grooves are formed between adjacent fixed grid bars (521), and the upper rear area of the rotary tillage blade (7) of the deep tillage shaft (4) is provided with a grid shaft (522) connected to both sides of the rotary tiller frame; The head end of the fixed grid bar (521) is fixedly connected to the high end of the plow blade (51), and the tail end of the fixed grid bar (521) is connected to the grid shaft (522).

3. The agricultural tiller for cleaning seedbed residue and deep scarification according to claim 2, wherein: The tail end of the fixed grid bar (521) is rotatably connected to the grid shaft (522); The filter grid further comprises a plurality of movable grid bars (523) arranged in parallel, the movable grid bars (523) are located between adjacent two fixed grid bars (521), the tail end of the movable grid bar (523) is fixedly connected to the grid shaft (522), and the head end is a free end, and in the rotating process of the grid shaft (522), the head end of the movable grid bar (523) can be lapped on the high end of the plow blade (51) or rotated to the outside of the rotary tiller frame.

4. The agricultural tiller for cleaning seedbed residue and deep scarification according to claim 1, wherein: Also included is a stubble cleaning shaft (6) parallel to the shallow plowing shaft (3) and the deep plowing shaft (4), the stubble cleaning shaft (6) being located in the middle region of the shallow plowing shaft (3) and the deep plowing shaft (4) and above the forwardly inclined region of the filter grid, the stubble cleaning shaft (6) being provided with radial stubble cleaning rods (61) arranged in a circumferential and axial array along the stubble cleaning shaft (6), the stubble cleaning rods (61) passing through the grid slots of the filter grid during rotation of the stubble cleaning shaft (6); The top housing of the rotary tiller frame covers the rotating region of the stubble cleaning rods (61).

5. The agricultural tillage machine for clearing seedbed stubble and deep tillage as described in claim 4, characterized in that: The stubble cleaning rods (61) are cylindrical in cross section, or the stubble cleaning rods (61) are also blade-shaped on one side along the direction of rotation.

6. The agricultural tillage machine for clearing seedbed stubble and deep tillage as described in claim 4, characterized in that: The direction of rotation of the shallow plowing shaft (3) is consistent with the forward direction of the agricultural tiller, and the direction of rotation of the stubble cleaning shaft (6) is opposite to that of the shallow plowing shaft (3).

7. The agricultural tillage machine for clearing seedbed stubble and deep tillage as described in claim 4, characterized in that: The rotary tiller frame includes a frame body and a frame top cover (11), the rear end of the frame top cover (11) being hingedly connected to the frame body, and the frame top cover (11) being capable of being flipped open. The frame body is provided with a mounting groove (12), and the two ends of the stubble cleaning shaft (6) are detachably connected to the mounting groove (12) through fastening plates (62) and bolts, and the mounting groove (12) extends to the edge of the frame body.

8. The agricultural tillage machine for clearing seedbed stubble and deep tillage as described in claim 1, characterized in that: The tail end of the rotary tiller frame is provided with a smoothing plate (13), the upper end of the smoothing plate (13) being hingedly connected to the tail end of the rotary tiller frame, and the tail end of the rotary tiller frame is also provided with a limiting table (14) limiting the maximum flipping angle of the smoothing plate (13).

9. The agricultural tiller for cleaning up the stubble of the seedbed and deep plowing according to claim 1, characterized in that: The deep plowing shaft (4) includes a shaft body and a bearing seat plate (41); The bearing seat plate (41) is arranged at the two ends of the shaft body and connected to the shaft body through bearings, and the bearing seat plate (41) is provided with a connecting slot hole (42) penetrating in the axial direction; The side plate of the rotary tiller frame is provided with an adjusting groove (15) for mounting the shaft body, and mounting screw holes are arranged on both sides of the adjusting groove (15), and the bearing seat plate (41) and the shaft body can be slidably adjusted in position along the adjusting groove (15) and fixed in position through the connecting slot hole (42) and the mounting screw hole; The adjusting groove (15) is arranged vertically or obliquely.

10. The agricultural tillage machine for clearing seedbed stubble and deep tillage as described in claim 8, characterized in that: The shallow plowing shaft (3) and the deep plowing shaft (4) are synchronously powered by a synchronous belt (8) or a synchronous chain, and the synchronous belt (8) or the synchronous chain also passes through a tensioning wheel (16), the tensioning wheel (16) being also mounted on the side plate of the rotary tiller frame through the bearing seat plate (41) and the position thereof also being adjustable to adapt to the change in the tensioning degree of the synchronous belt (8) or the synchronous chain caused by the depth adjustment of the deep plowing shaft (4).

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