Assembled straw pre-embedding mechanism of rice harvester

Abstract

The application discloses a spliced straw pre-embedding mechanism of a rice harvesting machine, which comprises a straw pile cutting mechanism, a smashing mechanism and a pre-embedding mechanism, a collecting bin is connected to the discharge port of the harvesting machine, the straw pile cutting mechanism is arranged below the collecting bin, the smashing mechanism is arranged at the tail of the collecting bin, the shunting mechanism is connected to the smashing mechanism, and the pre-embedding mechanism is connected to the shunting mechanism.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery for rice harvesting, and specifically to an assembled straw pre-burying mechanism for a rice harvester. Background Technology

[0002] Currently, rice is generally harvested using combine harvesters. However, early rice harvesting presents significant problems. The harvested rice stalks are quite long, and the straw is directly scattered on the paddy field, causing two issues: First, the long stalks require rotary tillers to break them up during plowing, but rotary tillers are expensive. Now, agricultural tillers are generally used, but the straw isn't broken up, leading to slower decomposition and hindering tillage. Second, with single-season and late-season rice, there's a long period without replanting after harvest. The straw is directly exposed to the air, preventing rapid decomposition and soil fertilization. It still requires plowing to decompose, and the straw can harbor insect eggs, increasing the probability of pests in the following year's rice. However, leaving the straw close to the ground reduces the harvesting efficiency of combine harvesters and lowers harvesting costs. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention proposes an assembly-type straw pre-burying mechanism for a rice harvester, which facilitates the cutting of longer straw in the field and pre-buries the straw and rice stalks during rice harvesting, thereby achieving rapid decomposition and enriching the soil.

[0004] To achieve the above objectives, the present invention provides: an assembled straw pre-buried mechanism for a rice harvester, comprising a straw stump cutting mechanism, a crushing mechanism, and a pre-buried mechanism. A collection bin is connected to the outlet of the harvester, a straw stump cutting mechanism is provided below the collection bin, a crushing mechanism is provided at the tail of the collection bin, a diversion mechanism is connected to the crushing mechanism, and a pre-buried mechanism is connected to the diversion mechanism.

[0005] The straw stack cutting mechanism includes a baffle, a feeding wheel, and a cutting assembly. A feeding wheel driven by a motor is mounted on the side of the baffle. The cutting assembly is located at the bottom of the baffle. Multiple feeding rods arranged in a circular array are arranged on the circumference of the feeding wheel. Grooves for the feeding rods to be inserted are formed on the outer wall of the feeding wheel. Elastic telescopic components are installed between the two ends of each feeding rod and the end face of the feeding wheel. A cutting assembly is located between the baffle and the feeding wheel. A receiving hopper is located at the front end of the feeding wheel, and a lifting assembly is installed between the receiving hopper and the collection bin.

[0006] An arc-shaped guard plate is installed on the top of the baffle, and an embedding groove is opened on the arc-shaped guard plate. A slitting assembly is installed in the embedding groove. The slitting assembly includes a slitting blade, a lifting assembly, and a linkage module. The slitting blade is installed in the embedding groove, and the bottom of the slitting blade is a cutting edge. A lifting assembly is set between the slitting blade and the top of the embedding groove. A downward pressing spring is set on the lifting assembly. A linkage module is installed at both ends of the slitting blade. The linkage module includes a helical tooth ring and a stop rod. A stop rod is installed at both ends of the slitting blade. A helical tooth ring is installed at both ends of the feeding wheel. The stop rod abuts against the outer wall of the helical tooth ring. A knife groove corresponding to the helical tooth ring is opened on the outer wall of the feeding wheel. The knife groove is a helical knife groove.

[0007] A feeding channel is provided between the bottom of the collection bin and the crushing mechanism, through which the straw and rice straw are further crushed;

[0008] The diversion mechanism includes a diversion box and diversion pipes. Multiple diversion pipes with equal spacing are set at the bottom of the diversion box. A pre-embedded mechanism is set at the end of the diversion pipe. An auger driven by a motor is embedded at the beginning of the diversion pipe. A pneumatic conveying component is set on the diversion pipe.

[0009] The pre-embedded mechanism includes a trenching component, a pre-embedded pipe, and a pressing and covering component. The pre-embedded pipe is connected to the end of the distribution pipe, a trenching component is installed at the front end of the pre-embedded pipe, and a pressing and covering component is set above the end of the pre-embedded pipe.

[0010] Preferably, a mounting frame is installed below the distribution box, and a grooving assembly is mounted on the mounting frame. The grooving assembly consists of multiple grooving wheels arranged side by side, each grooving wheel being mounted on the mounting frame via a bearing. The outer circumference of each grooving wheel is conical. Each pre-embedded pipe is located directly behind each grooving wheel, so that the crushed straw and rice straw inside the pre-embedded pipe are unloaded into the groove formed by the grooving wheel. A pressure plate is provided at the end of the pre-embedded pipe, and a swing arm is mounted on the pressure plate. The other end of the swing arm is hinged to the outside of the distribution box. On the wall, a hydraulic cylinder is hinged between the swing arm and the distribution box. The rear end of the pressure plate is hinged to the end of the swing arm. An elastic telescopic rod is set between the front end of the pressure plate and the swing arm. A pressing and covering soil assembly is installed at the bottom of the pressure plate. The pressing and covering soil assembly includes a covering soil scraper and a pressing roller. There are multiple sets of covering soil scrapers arranged side by side. Each set of covering soil scrapers consists of two pieces and is designed with a flared mouth. A pressing roller is set at the end of the covering soil scraper and is located behind the multiple sets of covering soil scrapers.

[0011] Preferably, the receiving hopper is trapezoidal and fits against the outer wall of the feeding wheel. A discharge notch is provided between the receiving hopper and the arc-shaped guard plate, through which the straw between the feeding wheel and the arc-shaped guard plate enters the receiving hopper. A negative pressure pump is installed at the top of the collection bin and is connected to the top of the collection bin. A discharge port is opened at the bottom of the receiving hopper. A vertical partition is provided inside the collection bin, dividing the collection bin into two sections, which are respectively connected to the receiving hopper and the discharge port of the harvester.

[0012] Preferably, the crushing mechanism is a horizontal crusher, which includes a crushing cylinder and crushing blades. A rotating shaft driven by a motor is provided inside the crushing cylinder, and multiple crushing blades are installed on the rotating shaft. A perforated mesh plate is located at the bottom of the crushing cylinder, and a distribution box is installed at the bottom of the crushing cylinder. The perforated mesh plate of the crushing cylinder is located inside the distribution box.

[0013] Preferably, the cutting assembly includes a fixed blade and a cutting blade. Multiple fixed blades are installed at equal intervals at the bottom of the front side of the baffle. A cutting blade is positioned above the fixed blades. A slide rail is provided on the front end face of the baffle. A sliding plate is installed on the slide rail. A crank-rocker mechanism driven by a motor is installed on the sliding plate and the baffle. The rocker arm of the crank-rocker mechanism is hinged to the sliding plate. Multiple cutting blades are installed at equal intervals on the sliding plate, and the end faces of the cutting blades are in contact with the fixed blades.

[0014] Compared with the prior art, the advantages of the present invention are: it facilitates the cutting of long straw in the field, and at the same time, the straw and rice straw are pre-buried when the rice is harvested, so as to achieve rapid decomposition and make the soil fertile. Attached Figure Description

[0015] Figure 1 This is the left view of the present invention.

[0016] Figure 2 This is a schematic diagram of the straw pile cutting mechanism of the present invention.

[0017] Figure 3 This is a schematic diagram of the feed wheel of the present invention.

[0018] Figure 4 This is a schematic diagram of the enhancement component of the present invention.

[0019] Figure 5 This is a schematic diagram of the collection bin, crushing mechanism, and diversion mechanism of the present invention.

[0020] Figure 6 This is a schematic diagram of the diversion mechanism of the present invention.

[0021] Figure 7 This is a schematic diagram of the pre-embedded mechanism of the present invention.

[0022] Figure 8This is a schematic diagram of the trenching wheel and the pre-embedded pipe of the present invention.

[0023] Figure 9 This is a schematic diagram of the pressure plate and the pressing and covering soil assembly of the present invention.

[0024] The components include: 1. Straw pile cutting mechanism; 2. Baffle; 3. Arc-shaped guard plate; 4. Embedded groove; 5. Slitting assembly; 6. Slitting blade; 7. Lifting assembly; 8. Linkage module; 9. Helical gear ring; 10. Contact rod; 11. Blade groove; 12. Feeding wheel; 13. Material scraper; 14. Cutting assembly; 15. Fixed blade; 16. Cutting blade; 17. Slide rail; 18. Sliding plate; 19. Crank rocker mechanism; 20. Elastic telescopic assembly; 21. Receiving hopper; 22. Lifting assembly; 23. Feeding... 24. Material channel, 25. Crushing mechanism, 26. Crushing cylinder, 27. Crushing blade, 28. Perforated mesh plate, 29. Embedded mechanism, 30. Trenching assembly, 31. Trenching wheel, 32. Embedded pipe, 33. Pressing and covering soil assembly, 34. Covering soil scraper, 35. Pressing roller, 36. Mounting frame, 37. Pressing plate, 38. Swinging arm, 39. Elastic telescopic rod, 40. Collection bin, 41. Vertical partition, 42. Diversion mechanism, 43. Material distribution box, 44. Material distribution pipe, 45. Pneumatic conveying assembly.

[0025] The components include: 1. Straw pile cutting mechanism; 2. Baffle; 3. Arc-shaped guard plate; 4. Embedded groove; 5. Slitting assembly; 6. Slitting blade; 7. Lifting assembly; 8. Linkage module; 9. Helical gear ring; 10. Contact rod; 11. Blade groove; 12. Feeding wheel; 13. Material scraper; 14. Cutting assembly; 15. Fixed blade; 16. Cutting blade; 17. Slide rail; 18. Sliding plate; 19. Crank rocker mechanism; 20. Elastic telescopic assembly; 21. Receiving hopper; 22. Lifting assembly; 23. Feeding... 24. Material channel, 25. Crushing mechanism, 26. Crushing cylinder, 27. Crushing blade, 28. Perforated mesh plate, 29. Embedded mechanism, 30. Trenching assembly, 31. Trenching wheel, 32. Embedded pipe, 33. Pressing and covering soil assembly, 34. Covering soil scraper, 35. Pressing roller, 36. Mounting frame, 37. Pressing plate, 38. Swinging arm, 39. Elastic telescopic rod, 40. Collection bin, 41. Vertical partition, 42. Diversion mechanism, 43. Material distribution box, 44. Material distribution pipe, 45. Pneumatic conveying assembly. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] like Figure 1-9The aforementioned modular straw pre-buried mechanism for a rice harvester includes a straw stump cutting mechanism 1, a crushing mechanism 24, and a pre-buried mechanism 28. A collection bin 39 is connected to the harvester's discharge outlet and is bolted to the back of the harvester. The collection bin 39 is directly connected to the harvester's slag outlet via a flange, allowing the harvester's waste to be directly discharged into the collection bin 39. The straw stump cutting mechanism 1 is located directly below the collection bin 39. The straw cutting mechanism 1 harvests the straw remaining from the harvester. Straw pressed into the soil by the harvester's traveling mechanism cannot be harvested (stalks in contact with soil have higher decomposition efficiency than vertically arranged straw). The cut straw is conveyed into the collection bin 39 for collection. A crushing mechanism 24 is located at the rear of the collection bin 39. The front side of the 4 is bolted to the back of the harvester; the straw in the collection bin 39 and the straw discharged from the harvester are crushed by the crushing mechanism 24, so that the soil can be quickly decomposed and fertilized after pre-burying. The crushing mechanism 24 is connected to the diversion mechanism 41, and the front side of the diversion mechanism 41 is also bolted to the back of the harvester. The crushed straw is transported into the diversion mechanism 41. The diversion mechanism 41 is connected to the pre-burying mechanism 28. Since uniform fertilization is required, multiple sets of pre-burying mechanisms 28 need to be set. The diversion mechanism 41 needs to distribute the debris into multiple pre-burying mechanisms 28 for pre-burying, so as to achieve uniform soil fertility in the farmland. The collection bin 39, the crushing mechanism 24 and the diversion mechanism 41 are connected and fixed by channel steel. A platform is fixed at the bottom of the diversion mechanism 41 by welding.

[0028] The straw stubble cutting mechanism 1 includes a baffle 2, a feeding wheel 12, and a cutting assembly 14. The baffle 2 is a vertical baffle 2, and a channel steel is fixed to the top of the baffle 2 by welding. The top of the channel steel on the baffle 2 is bolted to the bottom of the platform. The feeding wheel 12, driven by a motor, is installed on the front side of the baffle 2 via bearings and bearing seats. The feeding wheel 12 presses against the front side of the baffle 2 and rotates clockwise. The cutting assembly 14 is installed at the bottom of the baffle 2. The cutting assembly 14 cuts off the root of the straw. Multiple scraping rods 13 arranged in a circular array are provided on the circumference of the feeding wheel 12. The outer wall of the feeding wheel 12 has openings for scraping. The groove into which the rod 13 is embedded has an elastic telescopic component 20 installed at both ends of each feeding rod 13 and between the end face of the feeding wheel 12. The elastic telescopic component 20 includes a sliding rod and a spring. An inwardly extending sliding groove is formed in the groove of the feeding wheel 12, allowing the sliding rod to slide within the groove. A spring is installed in the sliding groove, with its two ends welded to the bottom of the groove and the bottom of the sliding rod, respectively. The spring pushes the sliding rod outward. A cutting component 5 is installed above the feeding wheel 12 to cut the straw on the feeding wheel 12, facilitating subsequent conveying and dispersion. A receiving hopper 21 is provided at the front end of the feeding wheel 12. The receiving hopper 21 is conical, with its left side fitting against the outer wall of the feeding wheel 12. The chopped straw from the feeding wheel 12 enters the conical hopper. The bottom of the conical hopper slopes downwards from back to front, allowing the straw to slide forward. A lifting assembly 22, a screw conveyor, is provided between the receiving hopper 21 and the collection bin 39. The screw conveyor has a small pitch for vertical conveying. The top outer wall of the screw conveyor is open, and an inclined channel is provided between the opening of the screw conveyor and the top surface of the collection bin 39. The opening of the screw conveyor is higher than the top surface of the collection bin 39. During operation... When the feeding rod 13 is not in a limited position, it pushes outward. As the feeding wheel 12 rotates clockwise, the feeding rod 13 pulls the straw between the feeding wheel 12 and the baffle 2. The feeding wheel 12 and the baffle 2 clamp the top of the straw. As the feeding wheel 12 continues to rotate clockwise, the straw is also conveyed clockwise. The feeding wheel 12 tensions the straw, and the root of the straw is cut off by the cutting component 14. The straw is conveyed to the slitting component 5 by the feeding wheel 12 for slitting. During slitting, the straw is cut by the slitting component 5. The slitting straw continues to be conveyed backward into the receiving hopper 21. The lifting mechanism lifts the straw upward into the collection bin 39.

[0029] A feeding channel 23 for docking is installed between the bottom of the collection bin 39 and the top of the crushing mechanism 24 via a flange. A feeding impeller is installed in the feeding channel 23. The feeding impeller is driven by a motor. The feeding impeller is used to assist feeding. The crushing mechanism 24 is used to further crush the straw and rice straw.

[0030] The diversion mechanism 41 includes a diversion box 42 and diversion pipes 43. Multiple diversion pipes 43 are arranged at equal intervals at the bottom of the diversion box 42. These pipes are arranged longitudinally and laterally side-by-side. Each diversion pipe 43 extends into the diversion box 42. A motor is bolted to the front end of each diversion pipe 43, and an auger is fixed to the output shaft of the motor. The auger extends into the diversion pipe 43. A connection is made at the top of each diversion pipe 43 to the bottom of the diversion box 42. The connecting gap allows the auger to rotate and transport the debris from the distribution box 42 into the distribution pipe 43. A pre-embedded mechanism 28 is connected to the rear end of the distribution pipe 43. A pneumatic conveying component 44 is installed on the distribution pipe 43. The pneumatic conveying component 44 is an air pump. The air outlet of the air pump is connected to the distribution pipe 43 through a pipe. The airflow direction is the same as the direction in which the distribution pipe 43 transports the debris. The connection point between the air pump and the distribution pipe 43 is located on the distribution pipe 43 at the end of the auger.

[0031] The pre-buried mechanism 28 includes a trenching component 29, a pre-buried pipe 31, and a pressing and covering component 32. The pre-buried pipe 31 (both the pre-buried pipe 31 and the distribution pipe 43 are rigid pipes) is connected to the left end of the distribution pipe 43. A trenching component is installed at the front end of the pre-buried pipe 31, and a pressing and covering component 32 is set above the end of the pre-buried pipe 31. When working, multiple parallel trenches are first dug in the farmland by the trenching component. The pre-buried pipe 31 discharges the debris into the trenches. The pressing and covering component 32 covers the trenches with soil and then compacts the soil.

[0032] A mounting frame 35 is installed below the distribution box 42. A rectangular frame is mounted on the mounting frame 35 via channel steel at the bottom of the platform below the distribution box 42. A ditching assembly 29 is mounted on the mounting frame 35. The ditching assembly 29 consists of multiple ditching wheels 30 arranged side-by-side. These multiple ditching wheels 30 are passed through and welded together by the same rotating rod. Both ends of the rotating rod are mounted on the mounting frame 35 via bearings and bearing seats. The outer circumference of the ditching wheels 30 is conical. Because the paddy fields in southern China are only drained a few days before harvest, the soil is relatively soft. When the ditching wheels 30 pass over the soft soil, they create downward grooves. Simultaneously, the ditching wheels 30 are located... The soil on both sides of the trench bulges upwards; each pre-buried pipe 31 is located directly behind each dredging wheel 30, so that the crushed straw and rice straw inside the pre-buried pipe 31 are unloaded into the trench formed by the dredging wheel 30; a pressure plate 36 is set behind the pre-buried pipe 31, and a swing arm 37 is installed on the pressure plate 36 by means of a hinge. The other end of the swing arm 37 is hinged to the platform on the outer wall of the distribution box 42. A hydraulic cylinder is hinged between the swing arm 37 and the distribution box 42. The swing arm 37 swings up and down by means of the extension and retraction of the hydraulic cylinder. The rear end of the pressure plate 36 is hinged to the end of the swing arm 37. An elastic telescopic rod 38 (which is a telescopic rod with a spring attached to it for elastic extension and contraction) is hinged between the end and the swing arm 37. A pressing and covering soil assembly 32 is installed at the bottom of the pressure plate 36. The pressing and covering soil assembly 32 includes covering soil scrapers 33 and pressing rollers 34. The covering soil scrapers 33 are multiple sets arranged horizontally side by side. The bottom of the covering soil scrapers 33 is a cutting edge. The top of the covering soil scrapers 33 is fixed to the top of the pressure plate 36 by welding. Each set of covering soil scrapers 33 consists of two pieces and has a flared design. The covering soil scrapers 33 are mounted on the left end by bearings and bearing seats. The trench is equipped with a pressing roller 34, which is located behind multiple sets of soil-covering scrapers 33. The trench after soil covering is compacted by the pressing roller 34. During operation, the debris is unloaded into the trench through the pre-embedded pipe 31. Then, the pressure plate 36 is pressed down by the swing arm, and the soil-covering scraper 33 is inserted into the soil. Due to the flared opening of the soil-covering scraper 33, the soil is covered into the trench, thus covering the debris. Since there is an elastic telescopic rod 38 hinged between the front end of the pressure plate 36 and the swing arm 37, when encountering relatively hard soil, the pressure plate 36 can be tilted, thus scraping the soil into the trench from shallow to deep.

[0033] An arc-shaped guard plate 3 is welded to the top of the baffle 2. The arc-shaped guard plate 3 is coaxial with the feed tube wheel. An embedding groove 4 is opened on the inner wall of the arc-shaped guard plate 3. A slitting assembly 5 is installed in the embedding groove 4. The slitting assembly 5 includes a slitting blade 6, a lifting assembly 7, and a linkage module 8. The slitting blade 6 is installed in the embedding groove 4. The bottom of the slitting blade 6 is a cutting edge. A lifting assembly 7 is set between the slitting blade 6 and the top of the embedding groove 4. The lifting assembly 7 includes a lifting seat and a vertical lifting rod. The slitting blade 6 is fixed to the bottom of the lifting seat by welding. The vertical lifting rod is fixed to the top of the lifting seat by welding and passes through the arc-shaped guard plate 3 to lift vertically, thus realizing the lifting of the slitting blade 6. A pressing spring is fitted on the lifting assembly 7 to press the slitting blade 6 downward. A linkage module 8 is welded to both ends of the slitting blade 6. The linkage module 8 includes a helical tooth ring 9 and a contact rod 10. A downwardly extending abutment rod 10 is installed by welding. A helical toothed ring is installed at both ends of the feeding wheel 12 by welding. The abutment rod 10 abuts against the outer wall of the helical toothed ring 9 and moves up and down along the tooth grooves of the helical toothed ring 9. A cutter groove 11 corresponding to the helical toothed ring is opened on the outer wall of the feeding wheel 12. The cutter groove 11 is an oblique cutter groove 11, which makes way for the slitting blade 6, thus facilitating the cutting of the straw. Taking the cutter groove 11 located at the top as an example, the cutter groove 11... The left side of the blade is inclined, and the right side of the blade groove 11 is vertical, which facilitates cutting and prevents the cutting blade 6 from breaking when the feeding wheel 12 rotates. An arc plate is installed in the embedded groove 4, and a groove of the same width as the cutting blade 6 is opened on the arc plate for the cutting blade 6 to pass through. An arc rod is fixed between the lower front end of the arc guard plate 3 and the top left end of the receiving hopper 21 by welding. The arc rod and the arc plate prevent the scraping rod 13 from being pushed out.

[0034] The receiving hopper 21 is a trapezoidal hopper. The top left side of the receiving hopper 21 is attached to the outer wall of the feeding wheel 12. The receiving hopper 21 and the arc-shaped guard plate 3 are staggered to form a discharge gap. The straw between the feeding wheel 12 and the arc-shaped guard plate 3 enters the receiving hopper 21 through the gap. A negative pressure pump is installed on the top of the collection bin 39 by bolt fastening. The negative pressure pump is connected to the top of the collection bin 39. A discharge port is opened at the bottom of the receiving hopper 21. The negative pressure pump creates a slight negative pressure in the collection bin 39 to facilitate the feeding of the collection bin 39. A vertical partition 40 is fixed in the collection bin 39 by welding. The partition divides the collection bin 39 into two sections, left and right. The two sections are respectively placed in the chopped straw and the grass leaves discharged by the harvester. The two sections are connected to the receiving hopper 21 and the discharge port of the harvester, respectively.

[0035] The crushing mechanism 24 is a horizontal crusher, which includes a crushing cylinder 25 and crushing blades 26. A rotating shaft driven by a motor is installed in the crushing cylinder 25 through bearings. Multiple crushing blades 26 are welded to the outer circumference of the rotating shaft. The high-speed rotating crushing blades 26 crush straw and grass leaves. At the bottom of the crushing cylinder 25 is a perforated mesh plate 27. The small shell allows the crushed particles to pass through the perforated mesh plate 27. A distribution box 42 is installed at the bottom of the crushing cylinder 25 through welding. The perforated mesh plate 27 of the crushing cylinder 25 is located in the distribution box 42, so that the crushed particles enter the distribution box 42 for distribution.

[0036] The cutting assembly 14 includes a fixed blade 15 and a cutting blade 16. Multiple fixed blades 15 are fixedly installed and welded to the bottom of the front side of the baffle 2. The cutting blades 16 are positioned above the fixed blades 15. A horizontally arranged slide rail 17 is fixedly welded to the front end face of the baffle 2. A sliding plate 18 is mounted on the slide rail 17 and can move left and right on the slide rail 17. A crank rocker mechanism 19 driven by a motor is installed between the sliding plate 18 and the baffle 2. The rocker arm of the crank rocker mechanism 19 is hinged to the sliding plate 18. Multiple cutting blades 16 are welded to the sliding plate 18 at equal intervals. The end faces of the cutting blades 16 are in contact with the fixed blades 15. The left and right movement of the sliding plate 18 is achieved by rotating the crank rocker mechanism 19.

Claims

1. A modular straw embedding mechanism of a rice harvester, comprising a straw pile cutting mechanism, a crushing mechanism and an embedding mechanism, a collection bin is connected to the discharge port of the harvester, the straw pile cutting mechanism is arranged below the collection bin, the crushing mechanism is arranged at the tail of the collection bin, the shunt mechanism is connected to the crushing mechanism, and the embedding mechanism is connected to the shunt mechanism, characterized in that ； The straw pile cutting mechanism comprises a baffle, a feeding wheel and a cutting assembly, wherein the feeding wheel driven by a motor is installed on the side of the baffle, the cutting assembly is arranged at the bottom of the baffle, a plurality of material scraping rods are arranged on the circumferential surface of the feeding wheel in an annular array, grooves for the material scraping rods to be embedded are formed on the outer wall of the feeding wheel, elastic extension assemblies are arranged between the two ends of each material scraping rod and the end surface of the feeding wheel, and a slitting assembly is arranged between the baffle and the feeding wheel; An arc-shaped guard plate is installed on the top of the baffle, an embedded groove is formed in the arc-shaped guard plate, and the slitting assembly is installed in the embedded groove. The slitting assembly comprises a slitting knife, a lifting assembly and a linkage module. The slitting knife is installed in the embedded groove, the bottom of the slitting knife is a blade surface, the lifting assembly is arranged between the slitting knife and the top of the embedded groove, a spring pressing downward is arranged on the lifting assembly, the linkage module is installed at the two ends of the slitting knife, the linkage module comprises a bevel gear ring and a contact rod, the contact rod is installed at the two ends of the slitting knife, the bevel gear ring is installed at the two ends of the feeding wheel, the contact rod is in contact with the outer wall of the bevel gear ring, and a knife groove corresponding to the bevel gear ring is formed in the outer wall of the feeding wheel, and the knife groove is a bevel groove. A feeding channel is arranged between the bottom of the collecting bin and the crushing mechanism, and further crushing of the straw and the straw is completed by the crushing mechanism. The shunting mechanism comprises a distribution box and a distribution pipe. A plurality of distribution pipes are arranged at equal intervals at the bottom of the distribution box, a pre-buried mechanism is arranged at the end of the distribution pipe, an auger driven by a motor is embedded at the beginning of the distribution pipe, and a pneumatic conveying assembly is arranged on the distribution pipe. The pre-buried mechanism comprises a ditching assembly, a pre-buried pipe and a pressing and covering assembly. The pre-buried pipe is connected to the end of the distribution pipe, the ditching assembly is installed at the front end of the pre-buried pipe, and the pressing and covering assembly is arranged above the end of the pre-buried pipe.

2. The modular straw embedding mechanism of a rice harvester according to claim 1, characterized in that, A mounting frame is installed below the distribution box, the ditching assembly is installed on the mounting frame, the ditching assembly comprises a plurality of ditching wheels arranged side by side, each ditching wheel is installed on the mounting frame through a bearing, and the outer circumferential surface of each ditching wheel is conical. Each pre-buried pipe is located directly behind each ditching wheel, so that the crushed straw and straw in the pre-buried pipe are unloaded into the groove pressed by the ditching wheel. A pressing plate is arranged at the end of the pre-buried pipe, a swing arm is installed on the pressing plate, the other end of the swing arm is hinged to the outer wall of the distribution box, a hydraulic cylinder is hinged between the swing arm and the distribution box, the rear end of the pressing plate is hinged to the end of the swing arm, an elastic extension rod is arranged between the front end of the pressing plate and the swing arm, a pressing and covering assembly is installed at the bottom of the pressing plate, and the pressing and covering assembly comprises a covering scraper and a pressing roller. Each group of covering scrapers comprises two covering scrapers arranged side by side and designed as a covering scraper horn, and the pressing roller is located behind the groups of covering scrapers.

3. The sectional straw embedding mechanism of a rice harvester according to claim 2, wherein The receiving hopper is a trapezoidal hopper, the receiving hopper is attached to the outer wall of the feeding wheel, a discharging gap is arranged between the receiving hopper and the arc-shaped guard plate, the straw between the feeding wheel and the arc-shaped guard plate enters the receiving hopper through the gap; a negative pressure pump is installed on the top of the collecting bin, the negative pressure pump is communicated with the top of the collecting bin, a discharging port is formed in the bottom of the receiving hopper; a vertical partition is arranged in the collecting bin, the collecting bin is divided into two intervals by the partition, and the two intervals are respectively communicated with the receiving hopper and the discharge port of the harvester.

4. The sectional straw embedding mechanism of a rice harvester according to claim 3, wherein The crushing mechanism is a horizontal crusher, and the crushing mechanism comprises a crushing cylinder and crushing blades. A rotating shaft driven by a motor is arranged in the crushing cylinder, and a plurality of crushing blades are installed on the rotating shaft. A perforated screen is arranged at the bottom of the crushing cylinder, and a distribution box is installed at the bottom of the crushing cylinder. The perforated screen of the crushing cylinder is located in the distribution box.

5. The sectional straw embedding mechanism of a rice harvester according to claim 4, wherein The cutting assembly comprises fixed knives and cutting knives. A plurality of fixed knives are arranged at equal intervals on the bottom of the baffle on the front side. The cutting knives are arranged above the fixed knives. A slide rail is arranged on the front end face of the baffle. A sliding plate is installed on the slide rail. A crank rocker mechanism driven by a motor is installed on the sliding plate and the baffle. The rocker of the crank rocker mechanism is hinged to the sliding plate. The cutting knives are arranged at equal intervals on the sliding plate. The cutting knives are attached to the end face of the fixed knives.

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