Spiral crushing and mixed burying device for straw returning to field

Abstract

The invention relates to the field of straw returning, in particular to a spiral crushing and mixed burying device for straw returning, which comprises a straw box, symmetrically distributed frames are arranged on the outer side of the straw box, fixedly connected hydraulic cylinders are arranged above the frames, and a fixedly connected mounting inclined plate is arranged below the other side of the straw box. A soil feeding and discharging stirring mechanism is further arranged below the straw box; straw crushing and continuous mixing of soil are achieved through the comprehensive effect expression of knife roll crushing, auger stirring and conveying belt linkage, the height and the inclination angle of the whole machine are adjusted in real time through the hydraulic cylinder, different tillage depth and terrain requirements are met, and the straw degradation efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of returning straw to fields, and in particular to a spiral crushing and burying device for returning straw to fields. Background Art

[0002] Straw return is an agricultural technology that applies crop straw (such as corn stalks and wheat straw) directly or after composting it to the soil. It aims to improve soil structure, enhance fertility, and reduce pollution from burning. Its core advantages include increasing soil organic matter and improving water and fertilizer retention. A Chinese invention patent discloses an auger hole deep loosening straw organic fertilizer deep burial machine (application number: 2024113068222). This application uses a disc furrow opener and a deep loosening shovel to achieve multi-stage drag reduction, facilitating subsequent drilling of holes by a deep-buried ground drill. The use of a shaftless spiral feeding blade ensures uniform feeding and is less prone to clogging. The upper end of the conical tooth direction-changing box sleeve at the rear of the drill bit in the conical tooth ground drill deep burial device is fixed with a conveying pipe, and the lower end adopts a beveled design, so that during the fertilization process, the organic fertilizer falls evenly into the drilled hole without clogging, avoiding uneven fertilization. However, the mechanism has the following defects when used: the device transports straw through an L-shaped conveying pipe, but the L-shaped conveying pipe is prone to material accumulation at the turning point, and the beveled sleeve relies solely on gravity to feed the material, which can easily cause uneven fertilization; and the device mainly buries the crushed straw, making it difficult to perform an integrated operation of crushing-mixing-deep burying the uncrushed straw, making the device less practical.

[0003] In view of the above technical defects, a solution is now proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a spiral crushing and burying device for returning straw to the field to solve the above-mentioned technical defects.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions: A spiral crushing and burying device for returning straw to fields, comprising a straw box, symmetrically distributed frames are provided on the outside of the straw box, fixed hydraulic cylinders are provided on the top of the frames, a fixed mounting inclined plate is provided below the other side of the straw box, a soil inlet and outlet stirring mechanism is further provided below the straw box, the soil inlet and outlet stirring mechanism includes a mixing box, a second fixed mounting plate is further provided inside the mixing box, and a stepping motor is fixedly installed inside the mixing box by bolts; A stepper motor 2 is fixed with bolts below the mounting plate 2, a crushing and conveying mechanism is provided inside the straw box, the crushing and conveying mechanism includes a stepper motor 3 fixedly connected to the straw box, a rotatably connected knife roller 1 and a rotatably connected knife roller 2 are provided inside the straw box, and three soil gathering mechanisms distributed in an array are provided below one side of the mounting inclined plate, and the soil gathering mechanism includes a V-shaped plate.

[0006] Preferably, the lower outer side of the frame is provided with a rotatably connected walking wheel, the driving shaft of the hydraulic cylinder close to the straw box side is fixedly connected to the slider one, the mixing box and the straw box are fixedly connected by bolts, and one side of the mixing box is also provided with a fixedly connected connecting frame, one side of the connecting frame is fixed with a mounting plate one by bolts, and an array-distributed plow is fixedly installed below the mounting plate one by bolts.

[0007] Preferably, the side of the mixing box away from the straw box is provided with three fixedly connected lower barrels in an array, the side of the mixing box close to the straw box is provided with three fixedly connected upper barrels in an array, and three mixing conveying troughs distributed in an array are also provided at the lower part of the interior of the mixing box.

[0008] Preferably, a reduction gear is placed on one side of the stepper motor, the drive shaft of the stepper motor is fixedly connected to the input shaft of the reduction gear, and a rotatably connected feeding auger is provided inside the mixing conveying trough. The output shaft of the reduction gear is transmitted to the feeding auger through a synchronous wheel, a shaft spur gear, a spur gear and a synchronous belt.

[0009] Preferably, an array of bearing seats are fixedly provided above the second mounting plate, and a universal joint main shaft is provided inside each of the bearing seats for rotational connection; One side of the universal joint main shaft is provided with a universal joint side shaft 1, and the other side of the universal joint main shaft is provided with a universal joint side shaft 2. One end of the universal joint side shaft 1 is provided with a fixedly connected threaded conveyor belt 1, and one end of the universal joint side shaft 2 is provided with a fixedly connected threaded conveyor belt 2. The outer side of the universal joint main shaft is provided with a fixedly connected synchronous wheel 2, and a synchronous belt 2 is sleeved between the synchronous wheels 2.

[0010] Preferably, a worm gear is fixedly provided on the outer side of the universal joint main shaft on one side, and a worm engaged with the worm gear is fixedly provided on the end of the driving shaft of the second stepper motor.

[0011] Preferably, the shaft at one end of the knife roller one is fixedly connected to the driving shaft of the stepper motor three, and the outer sides of the shafts at the other ends of the knife roller one and the knife roller two are fixedly provided with spur gears two that mesh with each other.

[0012] Preferably, two synchronous wheels three are installed on the outer side of the shaft at one end of the knife roller two, the two synchronous wheels three on the outer side of the knife roller two shaft are tightly arranged and fixedly connected to the knife roller two, the bottom of the straw box is also symmetrically provided with a first roller connected in rotation, one of the first rollers is provided with a synchronous wheel three fixedly connected on the outer side of the shaft at one end, a conveyor belt one is sleeved on the outer side of the first roller, and a second roller connected in rotation is provided in the straw box and the mixing box; The shaft at one end of the second roller in the straw box passes through the straw box and is provided with a fixedly connected synchronous wheel three, a synchronous belt three is sleeved between the three synchronous wheels, and a conveyor belt two is sleeved on the outer side of the second roller.

[0013] Preferably, symmetrically distributed sliding rods are fixedly provided above the V-shaped plate, and telescopic springs are fixedly connected between the sliding rods and the mounting inclined plate.

[0014] Compared with the existing technology, the above technical solution has the following beneficial effects: 1. This invention uses a hydraulic cylinder to adjust the overall height and tilt angle, and cooperates with a plow to achieve soil loosening pretreatment. During operation, the cutter roller group performs bidirectional rotational pulverization of straw, and the chopped straw is introduced into the mixing box via a multi-stage conveyor belt. Simultaneously, the threaded conveyor belt 1 driven by stepper motor 2 synchronously conveys the loose soil into the mixing box. Three feeding augers in the mixing box mix the chopped straw with the soil, and then the threaded conveyor belt 2 driven by stepper motor 2 evenly backfills the mixture into the field. Finally, a V-shaped soil gathering mechanism completes the soil covering and leveling. The entire process realizes the integrated and continuous operation of straw pulverization, soil mixing, and backfilling. The present invention uses three stepping motors to realize knife roller crushing, auger stirring, and conveyor belt linkage, thereby realizing the continuity of straw crushing and soil mixing, thereby improving working efficiency; the hydraulic cylinder realizes real-time adjustment of the height and tilt angle of the whole machine to adapt to different tillage depths and terrain requirements; three groups of synchronously driven feeding augers cooperate with directional conveying channels to ensure that the straw and soil are fully mixed to avoid local accumulation; thereby effectively solving the problems of incomplete crushing and uneven mixing in traditional straw return to the field, and significantly improving the straw degradation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0016] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connection structure of the straw box in the present invention; Figure 4 It is a partial cross-sectional structural diagram of the soil inlet and outlet mixing mechanism of the present invention; Figure 5 It is a schematic diagram of the connection structure between the mixing box and the plow in the present invention; Figure 6 It is a partial cross-sectional structural schematic diagram of the mixing box of the present invention; Figure 7 This is a schematic diagram of the connection structure between the stepping motor 1 and the feeding auger 1 in the present invention; Figure 8 This is a schematic diagram of the connection structure of the stepping motor 2, the threaded conveyor belt 1 and the threaded conveyor belt 2 in the present invention; Figure 9 This is a schematic diagram of the connection structure between the straw box and the crushing and conveying mechanism in the present invention; Figure 10 It is a schematic diagram of the overall fracture structure of the crushing and conveying mechanism of the present invention; Figure 11 It is a schematic diagram of the overall structure of the soil-polymerizing mechanism in the present invention.

[0018] Legend: 1. Straw box; 101. Slider 1; 11. Mounting plate 1; 12. Frame; 13. Hydraulic cylinder; 14. Travel wheel; 15. Mounting ramp; 16. Plow; 2. Soil inlet and outlet mixing mechanism; 21. Mixing box; 22. Feed chute; 23. Connecting frame; 24. Mounting plate (II); 25. Lower barrel; 26. Upper barrel; 27. Mixing conveyor chute; 28. Bearing frame; 29. ​​Protective housing (I); 30. Protective housing (II); 31. Stepper motor (I); 32. Reducer; 33. Synchronous pulley (I); 34. Spur gear with shaft; 35. Spur gear (I); 36. Feeding auger (I); 37. Synchronous belt (I); 38. Stepper motor (II); 39. Worm; 40. Worm gear; 41. Universal joint main shaft; 42. Universal joint side shaft (I); 43. Threaded conveyor belt (I); 44. Universal joint side shaft (II); 45. Threaded conveyor belt (II); 46. Bearing seat; 47. Synchronous pulley (II); 48. Synchronous belt (II); 5. Crushing and conveying mechanism; 51. Stepper motor three; 52. Knife roller one; 53. Knife roller two; 54. Spur gear two; 55. Synchronous belt three; 56. Synchronous wheel three; 57. Conveyor belt one; 58. Conveyor belt two; 6. Soil gathering mechanism; 61. V-shaped plate; 62. Sliding rod; 63. Telescopic spring. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application. Example 1

[0020] See also Figures 1-8 As shown, the present invention is a spiral crushing and burying device for returning straw to the field, including a straw box 1, with fixedly connected sliders 101 on both sides of the straw box 1, and symmetrically distributed frames 12 on the outside of the straw box 1, the sliders 101 are slidably connected to one of the frames 12, and the upper part of the frames 12 is provided with fixedly connected hydraulic cylinders 13, and the lower outer side of the frames 12 is provided with rotatably connected walking wheels 14, the driving shaft of the hydraulic cylinder 13 close to one side of the straw box 1 is fixedly connected to the slider 101, and a fixedly connected mounting inclined plate 15 is provided at the lower part of the other side of the straw box 1.

[0021] A soil inlet and outlet stirring mechanism 2 is also provided below the straw box 1, and the soil inlet and outlet stirring mechanism 2 includes a mixing box 21, which is fixedly connected to the straw box 1 by bolts, and a feed trough 22 is provided on one side of the mixing box 21. A fixedly connected connecting frame 23 is also provided on one side of the mixing box 21, and a mounting plate 11 is fixedly provided on one side of the connecting frame 23 by bolts, and an array-distributed plow 16 is fixedly installed below the mounting plate 11 by bolts.

[0022] The interior of the mixing box 21 is also provided with a fixedly connected mounting plate 24, and a bearing frame 28 is fixedly installed above the mounting plate 24. Three fixedly connected lower barrels 25 are arranged in an array on the side of the mixing box 21 away from the straw box 1, and three fixedly connected upper barrels 26 are arranged in an array on the side of the mixing box 21 close to the straw box 1. The lower barrels 25 and the upper barrels 26 are distributed vertically. Three mixing conveying troughs 27 distributed in an array are also provided at the lower part of the interior of the mixing box 21. The mixing conveying trough 27 is connected to the interior of the lower barrel 25, and a protective shell 29 is fixedly installed above the mounting plate 24 by bolts.

[0023] A protective shell 230 is also fixedly installed on one side of the mixing box 21 by bolts, and a stepper motor 31 is fixedly installed inside the mixing box 21 by bolts. A reduction gear 32 is placed on one side of the stepper motor 31, and the drive shaft of the stepper motor 31 is fixedly connected to the input shaft of the reduction gear 32. The output shaft of the reduction gear 32 passes through the mixing box 21 and is fixedly provided with a synchronous wheel 33. The interior of the mixing conveying trough 27 is provided with a rotatably connected feeding auger 36, and the shaft at one end of the feeding auger 36 passes through the mixing box 21 and is fixedly provided with a spur gear 35, and a meshing spur gear 34 with a shaft is provided below the spur gear 35. The shaft at one end of the spur gear 34 with a shaft is inserted into the mixing box 21 and is rotatably connected to the mixing box 21, and the outer side of the shaft at the other end of the spur gear 34 with a shaft is provided with two fixedly connected synchronous wheels 33, and a synchronous belt 37 is sleeved between the synchronous wheels 33.

[0024] When the stepper motor 31 is started, the power is decelerated by the reduction box 32 and then transmitted to the synchronous wheel 33, and then the three spur gears with shafts 34 are driven to rotate synchronously through the synchronous wheel 33 and the synchronous belt 37. When the spur gears with shafts 34 rotate, the spur gear 35 above them drives the feeding auger 36 to rotate, so that the stepper motor 31 drives the three feeding auger 36 to rotate synchronously when it is started, thereby mixing and transporting the straw shreds and soil in the mixing box 21.

[0025] An array of bearing seats 46 are fixed above the mounting plate 24. A rotatably connected universal joint main shaft 41 is provided inside the bearing seat 46. One side of the universal joint main shaft 41 is connected to a universal joint side shaft 1 42 through a universal joint fork and a cross shaft. The other side of the universal joint main shaft 41 is connected to a universal joint side shaft 2 44 through a universal joint fork and a cross shaft. One end of the universal joint side shaft 1 42 is provided with a fixedly connected threaded conveyor belt 1 43. One end of the universal joint side shaft 2 44 is provided with a fixedly connected threaded conveyor belt 2 45. The outer side of the universal joint main shaft 41 is provided with a fixedly connected synchronous wheel 2 47. A synchronous belt 2 48 is sleeved between the synchronous wheels 2 47.

[0026] A fixed worm gear 40 is also provided on the outside of the universal joint main shaft 41 on one side. A stepper motor 238 is fixedly provided under the mounting plate 24 by bolts. A fixed worm 39 is provided at the end of the drive shaft of the stepper motor 238. The worm 39 is located in the bearing frame 28 and is rotatably connected to the bearing frame 28. The worm 39 is engaged with the worm gear 40. When the stepper motor 238 is started, it drives the worm 39 to rotate, and the worm 39 drives the worm gear 40 to rotate. The worm gear 40 drives one of the universal joint main shafts 41 to rotate. One of the universal joint main shafts 41 drives the other two universal joint main shafts 41 to rotate synchronously through the synchronous wheel 247 and the synchronous belt 248. When the universal joint main shaft 41 rotates, it drives the universal joint side shaft 1 42 and the universal joint side shaft 2 44 to rotate synchronously, thereby driving the thread conveyor belt 1 43 and the thread conveyor belt 2 45 to rotate synchronously. Example 2

[0027] See also Figure 1-Figure 2 and Figures 9-11 As shown, the present invention is a spiral crushing and burying device for returning straw to the field, including a straw box 1. A crushing and conveying mechanism 5 is provided inside the straw box 1. The crushing and conveying mechanism 5 includes a stepper motor 3 51. The stepper motor 3 51 is located on the outside of the straw box 1 and is fixedly connected to the straw box 1. A rotatably connected knife roller 1 52 and a knife roller 2 53 are provided inside the straw box 1. The shaft at one end of the knife roller 1 52 is fixedly connected to the driving shaft of the stepper motor 3 51. The shafts at the other ends of the knife roller 1 52 and the knife roller 2 53 are fixedly provided with a spur gear 2 54 after extending out of the straw box 1. The spur gears 2 54 on one side of the knife roller 1 52 and the knife roller 2 53 are meshed with each other.

[0028] Two synchronous wheels 3 56 are installed on the outside of the shaft at one end of the knife roller 2 53. The two synchronous wheels 3 56 on the outside of the shaft of the knife roller 2 53 are tightly arranged and fixedly connected to the knife roller 2 53. The bottom of the straw box 1 is also symmetrically provided with a first roller that is rotatably connected. The outside of the shaft at one end of one of the first rollers is provided with a fixedly connected synchronous wheel 3 56. The outside of the first roller is provided with a conveyor belt 1 57. The straw box 1 and the mixing box 21 are both provided with a second roller that is rotatably connected. The shaft at one end of the second roller in the straw box 1 passes through the straw box 1 and is provided with a fixedly connected synchronous wheel 3 56. A synchronous belt 3 55 is provided between the synchronous wheels 3 56. The outside of the second roller is provided with a conveyor belt 2 58, and the conveyor belt 2 58 passes through the feed trough 22.

[0029] Three soil gathering mechanisms 6 are arranged in an array below one side of the mounting inclined plate 15. The soil gathering mechanism 6 includes a V-shaped plate 61. A symmetrically distributed sliding rod 62 is fixed above the V-shaped plate 61. A telescopic spring 63 is fixedly connected between the sliding rod 62 and the mounting inclined plate 15.

[0030] The working process and principles of this application are as follows: When in use, the device is first placed on the land where straw is to be buried, and the device is driven forward by an externally mounted agricultural machine. First, the ground clearance between the plow 16 and the loading barrel 26 is adjusted according to the root height of the subsequent crops. The device can be driven to rise and fall by activating the hydraulic cylinder 13. When only one side of the hydraulic cylinder 13 is activated, the tilt angle of the device can also be adjusted, thereby adjusting the plowing angle. When the device moves forward, the plow 16 under the mounting plate 11 penetrates into the soil to perform a preliminary loosening operation, and then the loading barrel 26 is inserted into the loosened soil. At this time, the stepper motor 1 31, the stepper motor 2 38 and the stepper motor 3 51 are started at the same time. When the stepper motor 3 51 is started, it drives the knife roller 1 52 to rotate, and the knife roller 1 52 drives the knife roller 2 53 to rotate synchronously in the opposite direction through the spur gear 2 54. The knife roller 2 53 drives the first roller and the second roller to rotate synchronously through the synchronous belt 3 55 and the synchronous wheel 3 56, respectively, and then drives the conveyor belt 1 57 and the conveyor belt 2 58 to transport the straw thereon. The conveyor belt 1 57 transports the straw to between the knife roller 1 52 and the knife roller 2 53. Then the knife roller 1 52 and the knife roller 2 53 chop the straw to the top of the conveyor belt 2 58, and the conveyor belt 2 58 then transports the straw to the mixing box 21; When the stepper motor 38 is started, it drives the worm 39 to rotate, the worm 39 drives the worm wheel 40 to rotate, and the worm wheel 40 drives one of the universal joint main shafts 41 to rotate. One of the universal joint main shafts 41 drives the other two universal joint main shafts 41 to rotate synchronously through the synchronous wheel 2 47 and the synchronous belt 2 48. When the universal joint main shaft 41 rotates, it drives the universal joint side shaft 1 42 and the universal joint side shaft 2 44 to rotate synchronously, and then drives the threaded conveyor belt 1 43 and the threaded conveyor belt 2 45 to rotate synchronously, so that the threaded conveyor belt 1 43 transports the soil from the ground into the mixing box 21; When the stepper motor 31 is started, its power is decelerated through the reduction gear 32 and then transmitted to the synchronous wheel 33, and then the three spur gears with shafts 34 are driven to rotate synchronously through the synchronous wheel 33 and the synchronous belt 37. When the spur gears with shafts 34 rotate, the spur gear 35 above it drives the feeding auger 36 to rotate, so that the stepper motor 31 drives the three feeding auger 36 to rotate synchronously when it is started, and then the straw crushed and soil in the mixing box 21 are mixed and transported to the discharge barrel 25. The feeding auger 36 then transports the soil mixed with the straw crushed to the field again. Subsequently, when the device moves, the V-shaped plate 61 flattens the soil buried with the straw, thereby completing the straw crushing and landfilling operation.

[0031] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A spiral crushing and burying device for returning straw to fields, comprising a straw box (1), characterized in that: The outer side of the straw box (1) is provided with a symmetrically distributed frame (12), and the upper part of each frame (12) is provided with a fixedly connected hydraulic cylinder (13). The lower part of the other side of the straw box (1) is provided with a fixedly connected mounting inclined plate (15). The lower part of the straw box (1) is also provided with a soil inlet and outlet stirring mechanism (2), and the soil inlet and outlet stirring mechanism (2) includes a mixing box (21). The interior of the mixing box (21) is also provided with a fixedly connected mounting plate 2 (24), and the interior of the mixing box (21) is fixedly provided with a stepping motor 1 (31) by bolts. A second stepper motor (38) is fixedly provided below the second mounting plate (24) by means of bolts. A crushing and conveying mechanism (5) is provided inside the straw box (1). The crushing and conveying mechanism (5) comprises a third stepper motor (51) fixedly connected to the straw box (1). A first knife roller (52) and a second knife roller (53) that are rotatably connected are provided inside the straw box (1). Three soil gathering mechanisms (6) distributed in an array are provided below one side of the mounting inclined plate (15). The soil gathering mechanism (6) comprises a V-shaped plate (61).

2. The spiral crushing and burying device for returning straw to fields according to claim 1 is characterized in that: The lower outer side of the vehicle frame (12) is provided with a rotatably connected walking wheel (14), the driving shaft of the hydraulic cylinder (13) close to the side of the straw box (1) is fixedly connected to the slider (101), the mixing box (21) is fixedly connected to the straw box (1) by bolts, and a fixedly connected connecting frame (23) is further provided on one side of the mixing box (21), a mounting plate (11) is fixedly provided on one side of the connecting frame (23) by bolts, and an array-distributed plow (16) is fixedly installed below the mounting plate (11) by bolts.

3. The spiral crushing and burying device for returning straw to fields according to claim 1 is characterized in that: The side of the mixing box (21) away from the straw box (1) is provided with three lower material barrels (25) fixedly connected in an array, and the side of the mixing box (21) close to the straw box (1) is provided with three upper material barrels (26) fixedly connected in an array. The interior of the mixing box (21) is also provided with three mixing conveying troughs (27) distributed in an array at the bottom.

4. The spiral crushing and burying device for returning straw to fields according to claim 3 is characterized in that: A reduction gearbox (32) is placed on one side of the stepper motor (31), and the driving shaft of the stepper motor (31) is fixedly connected to the input shaft of the reduction gearbox (32). A rotatably connected feeding auger (36) is provided inside the mixing conveying trough (27), and the output shaft of the reduction gearbox (32) drives the feeding auger (36) through a synchronous wheel (33), a shaft spur gear (34), a spur gear (35) and a synchronous belt (37).

5. The spiral crushing and burying device for returning straw to fields according to claim 1 is characterized in that: An array of bearing seats (46) are fixedly provided above the second mounting plate (24), and a universal joint main shaft (41) is rotatably connected to the inside of each bearing seat (46); One side of the universal joint main shaft (41) is provided with a universal joint side shaft 1 (42) connected thereto, and the other side of the universal joint main shaft (41) is provided with a universal joint side shaft 2 (44) connected thereto. One end of the universal joint side shaft 1 (42) is provided with a fixedly connected threaded conveyor belt 1 (43), and one end of the universal joint side shaft 2 (44) is provided with a fixedly connected threaded conveyor belt 2 (45). The outer side of the universal joint main shaft (41) is provided with a fixedly connected synchronous wheel 2 (47), and a synchronous belt 2 (48) is sleeved between the synchronous wheels 2 (47).

6. The spiral crushing and burying device for returning straw to fields according to claim 5, characterized in that: A worm gear (40) is fixedly provided on the outside of the universal joint main shaft (41) on one side, and a worm (39) meshing with the worm gear (40) is fixedly provided on the end of the driving shaft of the second stepper motor (38).

7. The spiral crushing and burying device for returning straw to fields according to claim 1 is characterized in that: The shaft at one end of the knife roller 1 (52) is fixedly connected to the drive shaft of the stepper motor 3 (51), and the outer sides of the shafts at the other ends of the knife roller 1 (52) and the knife roller 2 (53) are fixedly provided with a spur gear 2 (54) that meshes with each other.

8. The spiral crushing and burying device for returning straw to fields according to claim 1 is characterized in that: Two synchronous wheels (56) are installed on the outer side of the shaft at one end of the knife roller (53). The two synchronous wheels (56) on the outer side of the shaft of the knife roller (53) are closely arranged and fixedly connected to the knife roller (53). The bottom of the straw box (1) is also symmetrically provided with a first roller connected in rotation. The outer side of the shaft at one end of one of the first rollers is provided with a synchronous wheel (56) that is fixedly connected. The outer side of the first roller is provided with a conveyor belt (57). The straw box (1) and the mixing box (21) are both provided with a second roller connected in rotation. The shaft at one end of the second roller in the straw box (1) passes through the straw box (1) and is provided with a fixedly connected synchronous wheel three (56), a synchronous belt three (55) is sleeved between the synchronous wheels three (56), and a conveyor belt two (58) is sleeved on the outer side of the second roller.

9. The spiral crushing and burying device for returning straw to fields according to claim 1, characterized in that: Symmetrically distributed sliding rods (62) are fixedly provided above the V-shaped plate (61), and telescopic springs (63) are fixedly connected between the sliding rods (62) and the mounting inclined plate (15).

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