Rotary tillage, fertilization and soil covering compound operation machine

Abstract

The invention relates to the technical field of agricultural machinery, in particular to a rotary tillage, fertilization and soil covering composite operation machine which comprises a rack, a rotary tillage part, a seeding part, a fertilization part and a soil covering part are arranged below the rack, and the rotary tillage, fertilization and soil covering composite operation machine at least comprises a plurality of cleaning parts and a plurality of soil covering parts, the screening parts are arranged on one side of the cleaning part, and the screening parts are used for leveling the soil in a reciprocating mode and form a staggered structure; the driving part is arranged above the screening part and located below the rack, and the driving part is used for providing power for reciprocating motion of the screening part; according to the device, the driving part is used for driving the screening part to continuously stir soil, so that the soil is uniformly distributed above seeds and fertilizers, the soil on the roller is cleaned down through the cleaning part to form blocky soil, and then the blocky soil is smashed through a staggered structure formed by the screening part, so that the blocky soil is prevented from falling above the seeds and the fertilizers; and sundries such as broken stones are recycled.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a rotary tillage, fertilization and soil covering composite operation machine. Background Art

[0002] The rotary tillage, fertilization and soil covering machine is a modern agricultural machinery that integrates multiple functions. It is mainly used for soil cultivation, fertilization and soil covering operations in farmland, realizing efficient, convenient and intelligent farmland operations. This all-in-one machine can complete multiple operations at one time, greatly improving agricultural production efficiency.

[0003] At present, the following defects exist when the rotary tillage, fertilization and soil covering machine is used: First, after the all-in-one machine has finished sowing and fertilizing, it uses a covering structure to compact the soil to prevent the seeds and fertilizers from being exposed to the air. However, when the covering structure compacts the soil, the soil is unevenly distributed above the seeds and fertilizers, with some being thick and some being thin. This causes the compacted soil to be unevenly thick, so that the seeds and fertilizers are in different soil conditions, affecting the normal growth of the seeds. Secondly, when the soil covering structure (mostly using rollers) compacts the soil, if the soil is relatively moist, the surface of the roller is easy to adhere to the mud, which is not easy to clean off. The roller with mud attached will adhere to more mud, affecting the soil compaction effect of the soil covering structure. In addition, the mud cleaned off is large in size and falls directly on the field, which will also make the soil above the seeds uneven in thickness, further affecting the normal growth of the seeds. Thirdly, the soil attached to the roller may contain large pieces of stones and other debris, which also affect the normal growth of seeds. In view of this, we propose a rotary tillage, fertilization and soil covering compound operation machine. Summary of the invention

[0004] The object of the present invention is to provide a rotary tillage, fertilization and soil covering composite operation machine, which continuously stirs the soil through a screening part so that the soil is evenly distributed above the seeds and fertilizers, and cleans the soil on the roller through a cleaning part to form block soil, and then uses the staggered structure formed by the screening part to break up the block soil, and recover debris such as gravel.

[0005] To achieve the above object, a rotary tillage, fertilization and soil covering composite machine is provided, which comprises a frame, a rotary tillage part, a sowing part, a fertilization part and a soil covering part are arranged below the frame, and at least comprises: A plurality of cleaning parts, each cleaning part is used to clean the soil on the soil covering part; A plurality of sub-screening parts, each of which is arranged on one side of the cleaning part and is used for reciprocating to level the soil and form a staggered structure; The driving part is arranged above the sub-screening part and below the frame, and is used to provide power for the reciprocating movement of the sub-screening part.

[0006] As a further improvement of the present technical solution, the driving part includes a mounting plate fixedly matched with the inner wall of the frame and a motor fixedly matched with the top of the frame, the output end of the motor passes through the frame and is fixedly provided with a first rotating shaft, the first rotating shaft is provided with multiple second rotating shafts through multiple sets of pulleys and conveyor belts, and the bottom ends of the first rotating shaft and the second rotating shaft pass through the mounting plate and are connected to the screening part.

[0007] As a further improvement of the present technical solution, the sub-screening part includes a turntable fixedly matched with the bottom ends of the first rotating shaft and the second rotating shaft, and two grooved plates symmetrically fixedly matched with the two sides of the bottom of the mounting plate, a slider is slidably provided on the inner wall of the grooved plate, a reciprocating rod is fixedly provided between the two sliders, a through hole is opened on the top of the reciprocating rod, a cylindrical pin fixedly matched with the bottom of the turntable is slidably provided in the through hole, a telescopic rod is fixedly provided at the bottom of the reciprocating rod, a mounting frame is fixedly provided at the bottom of the telescopic rod, and the height of the mounting frame is adjusted by adjusting the length of the telescopic rod to meet different requirements for moving the soil.

[0008] As a further improvement of the technical solution, the screening part also includes an intermediate plate fixedly matched with the bottom of the mounting frame, the bottom corners of the intermediate plate are fixed with connecting blocks, the bottom ends of the two connecting blocks on the same side are fixed with screening boxes, a collecting box is fixed between the two screening boxes, and a plurality of toggle plates are fixedly provided at the bottom of the collecting box.

[0009] As a further improvement of the technical solution, a plurality of mounting holes are provided on one side of the screening box, and the screening box is arranged at an angle, a sliding rod is slidably provided in the mounting hole, a movable block is fixedly provided at one end of the sliding rod, a spring which cooperates with the sliding rod set is fixedly provided between the movable block and the screening box, a screening plate which contacts the bottom of the inner wall of the screening box is fixedly provided at the bottom of the movable block, a plurality of screening holes are provided at the bottom of the screening box and the screening plate, and a plurality of protrusions are fixedly provided between adjacent screening holes on the screening plate.

[0010] As a further improvement of the present technical solution, the cleaning part includes a connecting rod fixedly matched with one side of one of the grooved plates, a cleaning shovel in contact with the roller surface is fixedly provided at one end of the connecting rod, a cavity is provided inside the cleaning shovel, a hose connected to the cavity is fixedly provided at one end of the cleaning shovel, and a mounting block fixedly matched with the inner side of the mounting frame is fixedly provided at one end of the hose.

[0011] As a further improvement of the technical solution, a triangular inclined platform is fixedly provided at the top center of the middle plate, the triangular inclined platform is arranged below the end of the hose, and baffles are symmetrically fixedly provided on both sides of the triangular inclined platform, and the baffles are used to block the lumps of soil rolling down along the triangular inclined platform.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the rotary tillage, fertilization and soil covering composite operation machine, the driving part drives the screening part to continuously stir the soil so that the soil is evenly distributed above the seeds and fertilizers, and the soil on the roller is cleaned off by the cleaning part to form block soil, and then the block soil is broken up by the staggered structure formed by the screening part to prevent the block soil from falling on the seeds and fertilizers, and debris such as gravel is recovered.

[0013] In the rotary tillage, fertilization and soil covering composite operation machine, the first rotating shaft and the second rotating shaft drive the collecting box and the shifting plate to move back and forth, shift the soil above the seeds and fertilizers to make them evenly distributed and avoid uneven thickness, which is beneficial to promoting seed growth. In addition, a staggered motion structure is formed between the sieve plate and the sieve box, which, on the one hand, breaks up the block soil to prevent the block soil from falling directly on the ground, and separates the gravel from the soil to recycle the gravel in the soil.

[0014] In the rotary tillage, fertilization and soil covering composite operation machine, the soil on the roller under the cleaning shovel is cleaned by a cleaning shovel and a hose, so that a large amount of soil is prevented from adhering to the roller, the soil compacting effect of the roller is ensured, and the normal growth of seeds is further ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall external structure of the present invention; Figure 2 It is a schematic diagram of the structure of the driving part of the present invention; Figure 3 It is a schematic diagram of the external structure of the screening part of the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the sub-screening part of the present invention; Figure 5 It is a schematic diagram of the connection structure of the sub-screen plate, the movable block and the sliding rod of the present invention; Figure 6 It is a schematic diagram of the external structure of the cleaning part of the present invention; Figure 7 It is a schematic cross-sectional structure diagram of a cleaning portion of the present invention; Figure 8 For the present invention Figure 4 Schematic diagram of the local A enlarged structure.

[0016] The meaning of each number in the figure is: 1. Frame; 2. Cleaning part; 21. Connecting rod; 22. Cleaning shovel; 23. Hose; 24. Mounting block; 3. Screening part; 31. Turntable; 32. Slotted plate; 33. Sliding block; 34. Reciprocating rod; 35. Cylindrical pin; 36. Telescopic rod; 37. Mounting frame; 38. Intermediate plate; 39. Connecting block; 310. Screening box; 311. Collecting box; 312. Toggle plate; 313. Sliding rod; 314. Movable block; 315. Spring; 316. Screening plate; 317. Triangular inclined table; 318. Baffle; 4. Driving part; 41. Mounting plate; 42. Motor; 43. First rotating shaft; 44. Second rotating shaft. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The soil after rotary tillage covers the seeds and fertilizers underneath, but the soil is not evenly distributed above the seeds and fertilizers, and some are thick and some are thin, which affects the growth of seeds. When the rollers on the soil covering structure compact the soil, the roller surface is prone to sticking to the soil, which affects the compaction effect of the soil. The soil cleaned off the rollers may contain large stones, and the gravel will also affect the growth of seeds. To this end, the present invention provides a rotary tillage, fertilization and soil covering composite operation machine, which includes a frame 1, and a rotary tillage part, a sowing part, a fertilization part and a soil covering part are arranged below the frame 1, and at least includes: A plurality of cleaning parts 2, the cleaning parts 2 are used to clean the soil on the soil covering part; A plurality of sub-screening parts 3, the sub-screening parts 3 are arranged on one side of the cleaning part 2, and the sub-screening parts 3 are used for reciprocating to level the soil and form a staggered structure; The driving part 4 is arranged above the sub-screening part 3 and below the frame 1, and is used to provide power for the reciprocating movement of the sub-screening part 3; The present invention Figure 1 As shown, considering that after the soil is rotary tilled, the thickness of the soil on the seeds and fertilizers is uneven, even after the soil is compacted, the soil layers on the seeds and fertilizers will be thick and thin, making different seeds under different growth conditions, affecting the normal growth of the seeds. Therefore, Figure 2-5 As shown, the driving part 4 drives the multiple sub-screen parts 3 to move back and forth, and the sub-screen parts 3 are in contact with the surface of the soil after rotary tillage, and the soil is continuously moved, so that the soil is evenly distributed above the seeds and fertilizers before the soil covering part compacts the soil, so that different seeds are under the same growth conditions, which is conducive to seed growth; And considering that the roller in the soil covering part is easy to adhere to soil, the roller with soil will bring up more soil, causing seeds and fertilizers to be exposed, affecting seed growth, and the attached soil is large, falling on the field, it will also cause the thickness of the soil above the seeds to be uneven, further affecting seed growth, so if Figure 5-7 As shown, the soil on the roller in the soil covering part is continuously scraped off by the cleaning part 2, and the block soil is transported to the screening part 3. The staggered structure formed in the screening part 3 breaks up the block soil, and at the same time, the broken soil is evenly covered on the seeds, so as to achieve the purpose of cleaning the soil on the roller, which is beneficial to the growth of seeds. Considering that the soil attached to the roller contains large stones, these stones will also affect the normal growth of seeds. Figure 4-5 and Figure 8 As shown, the staggered structure can also screen out impurities such as gravel in the blocky soil, which is helpful for cleaning some debris in the soil and further promoting the normal growth of seeds.

[0019] On the basis of the above, the specific structure is disclosed in detail: In order to realize that the driving part 4 drives the screening part 3 to work and to move the soil above the seeds and fertilizers so that the soil is distributed more evenly, the specific structure of the driving part 4 is disclosed. Figure 1-2 As shown, the driving part 4 includes a mounting plate 41 fixedly matched with the inner wall of the frame 1 and a motor 42 fixedly matched with the top of the frame 1. The output end of the motor 42 passes through the frame 1 and is fixedly provided with a first rotating shaft 43. The first rotating shaft 43 is provided with a plurality of second rotating shafts 44 through a plurality of sets of pulleys and a conveyor belt. The bottom ends of the first rotating shaft 43 and the second rotating shaft 44 pass through the mounting plate 41 and are connected to the sub-screening part 3. The motor 42 rotates, driving the first rotating shaft 43 and the second rotating shaft 44 to rotate, thereby driving the sub-screening part 3 to move back and forth, repeatedly moving the soil above the seeds and fertilizers, so that the soil is evenly distributed above the seeds and fertilizers, which is beneficial to promoting seed growth.

[0020] Considering that the first rotating shaft 43 and the second rotating shaft 44 rotate to drive the sub-screen part 3 to reciprocate so as to evenly move the soil above the seeds and fertilizers, it is necessary to disclose in detail the specific structure of the sub-screen part 3 connected to the first rotating shaft 43 and the second rotating shaft 44. Figure 3 and Figure 8As shown, the sub-screening part 3 includes a rotating disk 31 fixedly matched with the bottom ends of the first rotating shaft 43 and the second rotating shaft 44, and two grooved plates 32 symmetrically fixedly matched with the two sides of the bottom of the mounting plate 41, a slider 33 is slidably provided on the inner wall of the grooved plate 32, a reciprocating rod 34 is fixedly provided between the two sliders 33, a through hole is opened on the top of the reciprocating rod 34, a cylindrical pin 35 fixedly matched with the bottom of the rotating disk 31 is slidably provided in the through hole, a telescopic rod 36 is fixedly provided at the bottom of the reciprocating rod 34, and a mounting frame 37 is fixedly provided at the bottom of the telescopic rod 36. The height of the mounting frame 37 is adjusted by adjusting the length of the telescopic rod 36 to meet different requirements for moving the soil. The first rotating shaft 43 and the second rotating shaft 44 are rotated to drive different rotating disks 31 to rotate, thereby driving the cylindrical pin 35 to rotate, and then driving the reciprocating rod 34 to reciprocate along the horizontal direction, thereby driving the telescopic rod 36 and the mounting frame 37 to reciprocate, so as to facilitate driving other structures in the sub-screening part 3 to move the soil above the seeds and fertilizers, so that the soil is evenly distributed, which is conducive to promoting the normal growth of seeds.

[0021] Considering that the movement of the reciprocating rod 34 drives the mounting frame 37 to reciprocate, and then drives the other structures of the sub-screening part 3 to reciprocate, so as to move the soil above the seeds and fertilizers, it is necessary to further disclose part of the structure of the sub-screening part 3. Figure 4-5 As shown, the screening part 3 also includes an intermediate plate 38 fixedly matched with the bottom of the mounting frame 37, and connecting blocks 39 are fixedly provided at the bottom corners of the intermediate plate 38. A screening box 310 is fixedly provided at the bottom ends of the two connecting blocks 39 on the same side, and a collecting box 311 is fixedly provided between the two screening boxes 310. A plurality of toggle plates 312 are fixedly provided at the bottom of the collecting box 311. The mounting frame 37 reciprocates, driving the intermediate plate 38 and the screening box 310 to reciprocate, and then driving the collecting box 311 and the toggle plates 312 to reciprocate. When the toggle plates 312 reciprocate, the soil above the seeds and fertilizers is continuously toggled, so that the soil is evenly distributed, which is beneficial to promoting the normal growth of the seeds. In the process of covering the soil, the cleaning part 2 continuously cleans the soil on the roller and transports it to the screening box 310.

[0022] Considering that the cleaning part 2 cleans the soil on the roller and sends it to the screening box 310, it is necessary to use an interlaced structure to break up the block soil and screen out impurities such as gravel in the soil, it is necessary to continue to disclose the interlaced structure in the screening part 3. Therefore, Figure 1As shown, a plurality of mounting holes are provided on one side of the screening box 310, and the screening box 310 is tilted, a sliding rod 313 is slidably provided on the mounting hole, a movable block 314 is fixedly provided at one end of the sliding rod 313, a spring 315 which is fitted with the sliding rod 313 is fixedly provided between the movable block 314 and the screening box 310, a screening plate 316 which contacts the bottom of the inner wall of the screening box 310 is fixedly provided at the bottom of the movable block 314, a plurality of screening holes are provided at the bottom of the screening box 310 and the screening plate 316, and a plurality of protrusions are fixedly provided between adjacent screening holes on the screening plate 316, and the screening box 310 continuously moves back and forth, and the screening box 310 continuously moves back and forth, and the screening plate 316 is fixedly provided with a plurality of protrusions. The spring 315 has a certain elastic force, so that the sub-screen plate 316 reciprocates and vibrates along the inner wall of the sub-screen box 310 while reciprocating, so as to break up the block soil and allow the gravel larger than the width of the sub-screen hole to collide repeatedly between the protrusions, so as to separate the soil and the stone, so as to break up the block soil. The broken soil passes through the sub-screen hole and evenly falls on the seeds and fertilizers, which is beneficial to the growth of seeds. In the process of repeated vibration, the stone rolls down along the inclined sub-screen box 310, and finally falls into the collection box 311 to complete the collection of the stone, so as to avoid the stone hindering the growth of seeds.

[0023] Considering that the cleaning part 2 is required to clean the soil on the roller, it is necessary to disclose the specific structure of the cleaning part 2. Figure 6-7 As shown, the cleaning part 2 includes a connecting rod 21 fixedly matched with one side of one of the grooved plates 32, a cleaning shovel 22 in contact with the roller surface is fixedly provided at one end of the connecting rod 21, a cavity is provided inside the cleaning shovel 22, a hose 23 connected with the cavity is fixedly provided at one end of the cleaning shovel 22, a mounting block 24 fixedly matched with the inner side of the mounting frame 37 is fixedly provided at one end of the hose 23, the soil on the roller surface is continuously shoveled away by the cleaning shovel 22, and the soil falls into the screening box 310 through the hose 23, so as to prevent the block soil from falling directly on the seeds and fertilizers, which is beneficial to the growth of seeds.

[0024] In order to make the soil shoveled off the roller fall more evenly into the screening box 310, so that the staggered movement between the screening plate 316 and the screening box 310 can better break up the blocky soil, it is necessary to further disclose the remaining structure of the screening part 3, such as Figure 4 As shown, a triangular inclined platform 317 is fixedly provided at the top center of the middle plate 38. The triangular inclined platform 317 is arranged below the end of the hose 23. Baffles 318 are symmetrically fixedly provided on both sides of the triangular inclined platform 317. The baffles 318 are used to block the lumps of soil rolling down along the triangular inclined platform 317. When the soil scraped from the roller is continuously sent to the triangular inclined platform 317 through the hose 23, the soil rolls down along both sides of the triangular inclined platform 317 into the two screening boxes 310 and falls on the screening plate 316, so as to break up the lumps of soil and separate the stones later.

[0025] In summary, the working principle is as follows: when the working machine needs to be used for tillage and fertilization, the working machine is installed behind other traction equipment (such as a tractor head, etc.), and the traction equipment provides power to drive the working machine to work, wherein the rotary tillage unit performs rotary tillage on the soil in the field, the sowing unit buries the seeds in the soil after rotary tillage, the fertilization unit spreads fertilizer on both sides of the sown seeds, and the covering unit compacts the soil that buries the seeds and fertilizers. Before the covering unit compacts the soil, the driving unit 4 drives the screening unit 3 and the cleaning unit 2 to work. The specific working process is as follows: The motor 42 is started to rotate, driving the first rotating shaft 43 to rotate, and through the transmission effect of the pulley and the conveyor belt, the plurality of second rotating shafts 44 are driven to rotate, and then the rotating disk 31 is driven to rotate with the first rotating shaft 43 and the second rotating shaft 44 as the axis, and then the cylindrical pin 35 is driven to rotate, and then the reciprocating rod 34 is driven to reciprocate in the horizontal direction, and then the collecting box 311 and the shifting plate 312 are driven to reciprocate, and the soil above the seeds and fertilizers is continuously shifted, so that the soil is evenly distributed above the seeds and fertilizers; The cleaning shovel 22 is attached to the roller. During the rotation of the roller, the cleaning shovel 22 continuously removes the soil on the roller. After the soil is shoveled into the cleaning shovel 22, it passes through the hose 23 and falls on the triangular inclined platform 317 from the end of the hose 23. The block soil rolls down along the triangular inclined platform 317 to the screening box 310. When the collecting box 311 and the toggle plate 312 move back and forth, the screening box 310 moves back and forth accordingly, driving the screening plate 316 to move back and forth. Since the spring 315 has a certain elastic force , so that the sub-screening plate 316 reciprocates and vibrates along the inner wall of the sub-screening box 310 while moving back and forth, and a staggered structure is formed between the sub-screening plate 316 and the sub-screening box 310, which continuously breaks up the blocky soil, and allows the gravel larger than the width of the sub-screening hole to repeatedly collide between the protrusions, so as to separate the soil and the stone, so that the broken soil passes through the sub-screening holes and falls evenly on the seeds and fertilizers. During the repeated vibration process, the stone rolls down along the inclined sub-screening box 310, and finally falls into the collecting box 311 to complete the collection of the stone.

[0026] 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit 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 protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotary tillage, fertilization and soil covering composite machine, comprising a frame (1), wherein a rotary tillage part, a sowing part, a fertilization part and a soil covering part are arranged below the frame (1), characterized in that: At least: A plurality of cleaning parts (2), wherein the cleaning parts (2) are used to clean the soil on the soil covering part; A plurality of sub-screening sections (3), wherein the sub-screening sections (3) are arranged on one side of the cleaning section (2), and the sub-screening sections (3) are used to reciprocate to level the soil and form a staggered structure; A driving part (4), the driving part (4) being arranged above the sub-screening part (3) and below the frame (1), the driving part (4) being used to provide power for the reciprocating movement of the sub-screening part (3); The sub-screening part (3) comprises a rotating disk (31) fixedly matched with the bottom ends of the first rotating shaft (43) and the second rotating shaft (44), and two grooved plates (32) symmetrically fixedly matched with the two sides of the bottom of the mounting plate (41); a sliding block (33) is slidably provided on the inner wall of the grooved plate (32); a reciprocating rod (34) is fixedly provided between the two sliding blocks (33); a through hole is provided at the top of the reciprocating rod (34); a cylindrical pin (35) fixedly matched with the bottom of the rotating disk (31) is slidably provided in the through hole; a telescopic rod (36) is fixedly provided at the bottom of the reciprocating rod (34); a mounting frame (37) is fixedly provided at the bottom of the telescopic rod (36); the height of the mounting frame (37) is adjusted by adjusting the length of the telescopic rod (36) to meet different requirements for moving soil; The screening section (3) further comprises an intermediate plate (38) fixedly matched with the bottom of the mounting frame (37); connecting blocks (39) are fixedly provided at the bottom corners of the intermediate plate (38); screening boxes (310) are fixedly provided at the bottom ends of two connecting blocks (39) located on the same side; a collecting box (311) is fixedly provided between the two screening boxes (310); and a plurality of toggling plates (312) are fixedly provided at the bottom of the collecting box (311); A plurality of mounting holes are provided on one side of the screening box (310), and the screening box (310) is tilted. A slide bar (313) is slidably provided in the mounting hole. A movable block (314) is fixedly provided at one end of the slide bar (313). A spring (315) fitted with the slide bar (313) is fixedly provided between the movable block (314) and the screening box (310). A screening plate (316) in contact with the bottom of the inner wall of the screening box (310) is fixedly provided at the bottom of the movable block (314). A plurality of screening holes are provided at the bottom of the screening box (310) and the screening plate (316), and a plurality of protrusions are fixedly provided between adjacent screening holes on the screening plate (316).

2. The rotary tillage, fertilization and soil covering composite machine according to claim 1, characterized in that: The driving part (4) comprises a mounting plate (41) fixedly matched with the inner wall of the frame (1) and a motor (42) fixedly matched with the top of the frame (1); an output end of the motor (42) passes through the frame (1) and is fixedly provided with a first rotating shaft (43); the first rotating shaft (43) is provided with a plurality of second rotating shafts (44) through a plurality of sets of pulleys and a conveyor belt; the bottom ends of the first rotating shaft (43) and the second rotating shaft (44) pass through the mounting plate (41) and are connected to the sub-screening part (3).

3. The rotary tillage, fertilization and soil covering composite machine according to claim 2 is characterized in that: The cleaning portion (2) comprises a connecting rod (21) fixedly matched with one side of one of the grooved plates (32); a cleaning shovel (22) in contact with the roller surface is fixedly provided at one end of the connecting rod (21); a cavity is provided inside the cleaning shovel (22); a hose (23) in communication with the cavity is fixedly provided at one end of the cleaning shovel (22); and a mounting block (24) fixedly matched with the inner side of a mounting frame (37) is fixedly provided at one end of the hose (23).

4. The rotary tillage, fertilization and soil covering composite machine according to claim 1, characterized in that: A triangular inclined platform (317) is fixedly provided at the center of the top of the middle plate (38), the triangular inclined platform (317) being provided below the end of the hose (23), and baffles (318) are symmetrically fixedly provided on both sides of the triangular inclined platform (317), the baffles (318) being used to block the blocky soil rolling downward along the triangular inclined platform (317).

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