A double-roller flail and straight knife combined rice and wheat straw breaking and uniform throwing device

Abstract

The present application relates to a kind of double-roller flail and straight knife combination formula rice and wheat broken straw uniform throwing device, including straw pulverizing mechanism, straw pulverizing mechanism includes pulverizing box, pulverizing box is equipped with front pulverizing shaft and rear pulverizing shaft at interval, front pulverizing shaft is equipped with front pulverizing roller, front pulverizing roller is alternately equipped with multiple straight knife group A and flail group A along its circumferential direction, rear pulverizing shaft is equipped with rear pulverizing roller, rear pulverizing roller is alternately equipped with multiple straight knife group B and flail group B along its circumferential direction;Fan is used to blow broken straw to swing uniform throwing mechanism;Swing uniform throwing mechanism includes mounting plate, mounting plate is equipped with multiple splitter plate at interval, splitter plate upper end is equipped with linkage support column, adjacent two linkage support columns are connected by linkage connecting rod, one of linkage support column is rotatably connected with swing guide rod, swing guide rod other end is rotatably arranged in mounting plate, swing guide rod is connected with swing driver.There is the advantages such as structure design reasonable, straw pulverizing effect is good, broken straw uniform throwing etc..

Description

Technical Field

[0001] This invention relates to the field of smart agriculture technology, specifically to a device for uniformly spreading rice and wheat straw using a combination of double-roller shovel and straight blade. Background Technology

[0002] Wheat, rice, and corn are known as the three major grain crops, with wheat having the largest planting area, highest yield, and widest distribution in the world. Previously, rice, wheat, and corn stalks were mostly used for cooking or burned directly in the fields. This method of disposal, primarily through burning, not only resulted in low utilization of straw resources but also polluted the surrounding environment. To effectively strengthen environmental protection, various regions have introduced relevant laws and regulations to completely prohibit the burning of straw. The ban on straw burning has directly spurred the development of straw crushing and returning technology to the field.

[0003] Straw crushing and returning to the field technology mainly involves using agricultural machinery to crush straw and then directly spreading it in the field. The straw decomposes in the soil into organic fertilizer, thereby improving the soil, increasing soil nutrient content, and improving the soil microbial environment. Straw crushing and returning to the field is a convenient, fast, low-cost, and sustainable straw treatment method that can improve soil fertility over a large area.

[0004] Current technologies for spreading chopped straw rely on direct wind blowing. While this method achieves spreading, it results in long, unevenly distributed piles of straw in the field. This hinders subsequent soil tillage and prevents proper decomposition into organic fertilizer, ultimately leading to unsatisfactory straw return to the field. To achieve uniform spreading of chopped straw, two key technical challenges must be addressed: first, improving the crushing effect and efficiency of rice and wheat straw. Traditional straw crushing mechanisms use single-roller straight blades, resulting in generally poor crushing efficiency and effectiveness. Furthermore, straw moisture content significantly impacts the crushing process, directly affecting subsequent spreading. Second, ensuring uniform spreading of the chopped straw. Traditional direct blowing methods fail to achieve even distribution; therefore, it is necessary to design a new spreading mechanism capable of uniformly spreading the chopped straw.

[0005] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art and provide a rice and wheat straw uniform spreading device that combines a double-roller shovel and a straight blade, which has the advantages of reasonable structural design, good straw crushing effect, and uniform spreading of straw.

[0007] The present invention achieves the above objectives by adopting the following technical solutions:

[0008] A combined double-roller and straight-blade device for evenly spreading rice and wheat straw includes:

[0009] A straw crushing mechanism for efficient straw crushing includes a crushing box with a feeding port at the front and a discharge port at the rear. A front crushing shaft and a rear crushing shaft are spaced apart along the straw feeding direction on the crushing box. One end of the front crushing shaft has a front sprocket and a crushing pulley. A front crushing roller is mounted on the front crushing shaft. Multiple straight blade groups A and swing blade groups A are alternately arranged along the circumference of the front crushing roller. Each straight blade group A includes multiple straight blades A spaced apart along the axial direction of the front crushing roller. Each swing blade group A is located between two straight blades A. The rear crushing... A rear sprocket is provided at one end of the crushing shaft. The rear sprocket is connected to the front sprocket by a chain. A rear crushing roller is provided on the rear crushing shaft. Multiple straight blade groups B and throwing blade groups B are alternately arranged along the circumference of the rear crushing roller. The straight blade group B includes multiple straight blade units spaced apart along the axial direction of the rear crushing roller. Each straight blade unit includes two straight blades B spaced apart. The throwing blade group B includes multiple throwing blade units spaced apart along the axial direction of the rear crushing roller. Each throwing blade unit includes two throwing blades B spaced apart. A straight blade A is located between two throwing blades B in the same throwing blade unit. A throwing blade A is located between two straight blades B in the same straight blade unit.

[0010] A blower is used to blow chopped straw toward a swinging and evenly spreading mechanism. The swinging and evenly spreading mechanism is connected to the discharge port of the straw crushing mechanism through a material channel. The blower is located at the lower end of the straw crushing mechanism.

[0011] A swing-type uniform spreading mechanism is used to uniformly spread chopped straw. It includes a mounting plate installed on a material channel. Multiple diversion plates are spaced apart on the mounting plate along a direction perpendicular to the flow direction of the chopped straw. The diversion plates are rotatably mounted on the mounting plate. A linkage support is provided at the upper end of the diversion plate. Two adjacent linkage supports are connected by a linkage rod. One of the linkage supports is rotatably connected to a swing guide rod. The other end of the swing guide rod is rotatably mounted on the mounting plate. The swing guide rod is connected to a swing driver. The swing driver drives the diversion plates to swing back and forth through the swing guide rod and the linkage rod.

[0012] The swing actuator includes a protective cover mounted on a mounting plate, an electric motor mounted on the protective cover, a crank connected to the electric motor, a groove along the length of the swing guide rod, a slider in the groove, and the crank and slider being rotatably connected.

[0013] The protective cover is provided with a guide groove, the electric motor is slidably mounted on the guide groove, the protective cover is provided with a linear stepper motor, the linear stepper motor is connected to the electric motor through a lead screw, the crank is provided with an adjustment groove along its length, a bushing is slidably mounted in the adjustment groove, and the electric motor is connected to the bushing.

[0014] The upper end of the diverter plate is provided with a folded edge, and the linkage support is disposed on the folded edge.

[0015] The diverter plate has a bending design in the middle.

[0016] The end of the diverter plate closest to the mounting plate is designed with an inclined end face.

[0017] The mounting plate is provided with guide grooves to guide the linkage support.

[0018] The speed of the front crushing roller is less than that of the rear crushing roller.

[0019] The height of the rear crushing roller is less than the height of the front crushing roller.

[0020] The front and rear crushing shafts are respectively mounted on the crushing box via bearings and bearing seats.

[0021] The front crushing roller is provided with multiple straight knife seats A, and the straight knife A is provided on the straight knife seat A. The front crushing roller is provided with multiple swivel knife seats A, and swivel knives A are rotatably provided on the swivel knife seats A. The rear crushing roller is provided with multiple straight knife seats B, and two straight knives B are symmetrically provided on both sides of the straight knife seat B. The rear crushing roller is provided with multiple swivel knife seats B, and two swivel knives B are symmetrically rotatably provided on both sides of the swivel knife seats B.

[0022] The fan includes a housing, with air inlets on both sides and an air outlet at the top, which is connected to the discharge port. Bearing plates are provided on both sides of the housing, and fan bearing seats are provided on the bearing plates. A fan bearing is provided inside the fan bearing seats, and a fan shaft is provided on the fan bearing. Multiple fan plates are provided on the fan shaft, and a fan pulley is provided at one end of the fan shaft.

[0023] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0024] By designing a combined double-roller shredder and straight-blade crushing mechanism, the crushing effect and efficiency of straw can be significantly improved, laying the foundation for uniform spreading. The oscillating spreading mechanism enables multiple diverter plates to oscillate in unison, thus achieving uniform spreading of the shredded straw. By designing a linear stepper motor, a sliding electric motor, and a sliding bushing, the oscillation amplitude of the diverter plates, i.e., the spreading width, can be adjusted, thereby controlling the spreading width of the shredded straw and reducing its strip-like spreading pattern. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the rice and wheat straw uniform spreading device of the present invention;

[0026] Figure 2 This is a schematic diagram of the rice and wheat straw uniform spreading device of the present invention from another perspective.

[0027] Figure 3 This is a schematic diagram of the internal structure of the rice and wheat straw uniform spreading device of the present invention;

[0028] Figure 4 This is a schematic diagram of the straw crushing mechanism of the present invention;

[0029] Figure 5 This is a top view of the straw crushing mechanism of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the fan of the present invention;

[0031] Figure 7 This is a schematic diagram of the oscillating uniform spreading mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the swinging uniform spreading mechanism of the present invention from another perspective;

[0033] Figure 9 This is a schematic diagram of the internal structure of the oscillating uniform spreading mechanism of the present invention;

[0034] Figure 10 This is a schematic diagram of a portion of the oscillating and uniformly spreading mechanism of the present invention;

[0035] Figure 11 This is a schematic diagram of the structure of the flow divider of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of the diverter plate of the present invention swinging to another position;

[0037] In the diagram: 1. Crushing box; 2. Feed inlet; 3. Discharge outlet; 4. Front crushing shaft; 5. Rear crushing shaft; 6. Front sprocket; 7. Crushing pulley; 8. Front crushing roller; 9. Straight knife assembly A; 901. Straight knife holder A; 902. Straight knife A; 10. Throwing knife assembly A; 1001. Throwing knife holder A; 1002. Throwing knife A; 11. Rear sprocket; 12. Chain; 13. Rear crushing roller; 14. Straight knife assembly B; 1401. Straight knife holder B; 1402. Straight knife B; 15. Throwing knife assembly B; 1501. Throwing knife holder B; 1502. Throwing knife B; 16. Fan; 1601. Machine casing; 1602. Air inlet; 1603. Air outlet. 1604. Bearing plate; 1605. Fan bearing housing; 1606. Fan bearing; 1607. Fan shaft; 1608. Fan plate; 1609. Fan pulley; 17. Material channel; 18. Mounting plate; 19. Diverter plate; 20. Linkage support column; 21. Linkage rod; 22. Swing guide rod; 23. Protective cover; 24. Electric motor; 25. Crank; 26. Slide groove; 27. Slider; 28. Guide slide groove; 29. ​​Linear stepper motor; 30. Lead screw; 31. Adjustment slide groove; 32. Bushing; 33. Folded edge; 34. Inclined end face; 35. Guide groove; 36. Bearing; 37. Bearing housing. Detailed Implementation

[0038] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0040] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0041] In this invention, the terms “upper end”, “middle”, “both sides”, “front end”, “rear end”, etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the location of the indicated technical feature.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "provided with," "set up," "connected," and "connected" should be interpreted broadly. For example, "provided with" and "set up" can refer to a fixed installation, a detachable installation, or an integral part of the device; "connected" can refer to a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] like Figure 1-12 As shown, a combined double-roller and straight-blade rice / wheat straw uniform spreading device includes:

[0044] A straw crushing mechanism for efficient straw crushing includes a crushing box 1, a feeding port 2 at the front end and a discharge port 3 at the rear end. A front crushing shaft 4 and a rear crushing shaft 5 are spaced apart along the straw feeding direction on the crushing box 1. A front sprocket 6 and a crushing pulley 7 are located at one end of the front crushing shaft 4. A front crushing roller 8 is mounted on the front crushing shaft 4. Multiple straight blade groups A9 and throwing blade groups A10 are alternately arranged along the circumference of the front crushing roller 8. The straight blade group A9 includes multiple straight blades A902 spaced apart along the axial direction of the front crushing roller 8. The throwing blade group A10 includes multiple throwing blades A1002 spaced apart along the axial direction of the front crushing roller 8, with each throwing blade A1002 located between two straight blades A902. One end of the rear crushing shaft 5 is equipped with... A rear sprocket 11 is connected to the front sprocket 6 via a chain 12. A rear crushing roller 13 is provided on the rear crushing shaft 5. Multiple straight blade groups B14 and throwing blade groups B15 are alternately arranged along the circumference of the rear crushing roller 13. The straight blade group B14 includes multiple straight blade units spaced apart along the axial direction of the rear crushing roller 13. Each straight blade unit includes two straight blades B1402 spaced apart. The throwing blade group B15 includes multiple throwing blade units spaced apart along the axial direction of the rear crushing roller 13. Each throwing blade unit includes two throwing blades B1502 spaced apart. A straight blade A902 is disposed between two throwing blades B1502 in the same throwing blade unit. A throwing blade A1002 is disposed between two straight blades B1402 in the same straight blade unit.

[0045] The blower 16 is used to blow the chopped straw toward the swinging and evenly spreading mechanism. The swinging and evenly spreading mechanism is connected to the discharge port 3 in the straw crushing mechanism through the material channel 17. The blower 16 is located at the lower end of the straw crushing mechanism.

[0046] A swing-type uniform spreading mechanism is used to uniformly spread chopped straw. It includes an installation plate 18 mounted on a material channel 17. Multiple diversion plates 19 are spaced at intervals on the installation plate 18 along a direction perpendicular to the flow direction of the chopped straw. Each diversion plate 19 is rotatably mounted on the installation plate 18. A linkage support 20 is provided at the upper end of each diversion plate 19. Adjacent linkage supports 20 are connected by a linkage rod 21. One linkage support 20 is rotatably connected to a swing guide rod 22. The other end of the swing guide rod 22 is rotatably mounted on the installation plate 18. The swing guide rod 22 is connected to a swing driver. The swing driver drives the diversion plates 19 to swing back and forth via the swing guide rod 22 and the linkage rod 21. By designing a combined double-roller and straight-blade crushing mechanism, the crushing effect and efficiency of straw can be significantly improved, laying the foundation for uniform spreading. The swing-type uniform spreading mechanism enables multiple diversion plates 19 to swing back and forth in linkage, thereby achieving uniform spreading of the chopped straw.

[0047] The swing actuator includes a protective cover 23 mounted on a mounting plate 18. An electric motor 24 is mounted on the protective cover 23, and a crank 25 is connected to the electric motor 24. A groove 26 is provided along the length of the swing guide rod 22, and a slider 27 is disposed within the groove 26. The crank 25 is rotatably connected to the slider 27. Using an electric motor 24 and a crank 25 to drive the swing guide rod 22 has advantages such as simple and reliable structural design and low operating cost.

[0048] The protective cover 23 is provided with a guide groove 28, and the electric motor 24 is slidably mounted on the guide groove 28. The protective cover 23 is provided with a linear stepper motor 29, which is connected to the electric motor 24 via a lead screw 30. The crank 25 is provided with an adjusting groove 31 along its length, and a bushing 32 is slidably mounted in the adjusting groove 31. The electric motor 24 is connected to the bushing 32. By designing the linear stepper motor 29, the sliding electric motor 24, and the sliding bushing 32, the swing amplitude of the diverter 19 can be adjusted, i.e., the uniform spreading width, thereby controlling the spreading width of the chopped straw and reducing its strip-shaped spreading.

[0049] The upper end of the diverter plate 19 is provided with a folded edge 33, and the linkage support 20 is disposed on the folded edge 33. The design of the folded edge 33 not only helps to enhance the structural strength of the diverter plate 19, but also facilitates the installation of the linkage support 20.

[0050] The diverter plate 19 features a bend design in the middle. This bend design increases the diverting width, thereby increasing the area of ​​uniform spraying.

[0051] The end of the diversion plate 19 near the mounting plate 18 is designed with an inclined end face 34. This design allows some of the chopped straw to be directly scattered from the inclined notch, while the rest is scattered through the diversion plate 19, achieving a fan-shaped scattering in the vertical direction. The oscillation of the diversion plate 19 achieves a large-area uniform scattering in the horizontal direction, while the inclined end face 34 enables uniform scattering of the chopped straw in the vertical direction, further improving the overall uniform scattering effect.

[0052] The mounting plate 18 is provided with a guide groove 35 to guide the linkage support 20, thereby improving the swing accuracy of the diverter plate 19.

[0053] The front crushing roller 8 rotates at a lower speed than the rear crushing roller 13. This helps to improve the crushing effect and efficiency.

[0054] The height of the rear crushing roller 13 is less than the height of the front crushing roller 8, which facilitates the rapid entry and crushing of straw.

[0055] The front crushing shaft 4 and the rear crushing shaft 5 are respectively mounted on the crushing box 1 via bearing 36 and bearing seat 37.

[0056] The front crushing roller 8 is provided with multiple straight blade holders A901, and straight blades A902 are provided on the straight blade holders A901. The front crushing roller 8 is provided with multiple swivel blade holders A1001, and swivel blades A1002 are rotatably provided on the swivel blade holders A1001. The rear crushing roller 13 is provided with multiple straight blade holders B1401, and two straight blades B1402 are symmetrically provided on both sides of the straight blade holders B1401. The rear crushing roller 13 is provided with multiple swivel blade holders B1501, and two swivel blades B1502 are symmetrically rotatably provided on both sides of the swivel blade holders B1501.

[0057] The blower 16 includes a housing 1601, with air inlets 1602 on both sides and an air outlet 1603 at the top, which communicates with the discharge port 3. Bearing plates 1604 are respectively provided on both sides of the housing 1601, with blower bearing seats 1605 on the bearing plates 1604. A blower bearing 1606 is housed within the bearing seat 1605, and a blower shaft 1607 is mounted on the bearing 1606. Multiple blower plates 1608 are mounted on the blower shaft 1607, and a blower pulley 1609 is located at one end of the shaft. The blower promptly blows the pulverized straw towards the oscillating and evenly spreading mechanism.

[0058] The working process of the straw shredding and uniform spreading device of the present invention:

[0059] The straw shredding and spreading device of this application can be directly installed on a rice and wheat combine harvester, improving its applicability. The crushing pulley 7 and the blower pulley 1609 of this application are connected to the power system of the combine harvester via belts to provide power.

[0060] The combine harvester feeds the separated straw into the crushing box 1. The straight blades A902 and the throwing blades A1002 on the front crushing roller 8 work together with the straight blades B1402 and the throwing blades B1502 on the rear crushing roller 13 to crush the straw. The blower 16 feeds the crushed straw into the swinging and evenly spreading mechanism through the material channel 17. The electric motor 24 drives the crank 25 to rotate through the bushing 32. The rotation of the crank 25 drives the swinging guide rod 22 to swing back and forth. The swinging guide rod 22 drives all the diverter plates 19 to swing back and forth through the linkage 21 and the linkage support 20, thereby achieving the even spreading of the crushed straw.

[0061] The position of the electric motor 24 can be adjusted by the linear stepper motor 29 and the lead screw 30. The electric motor 24 drives the bushing 32 to move in the adjusting slide 31, changing the rotation center position of the crank 25 (equivalent to changing the length of the crank 25), thereby changing the swing amplitude of the splitter plate 19.

[0062] The above specific embodiments should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, any alternative improvements or modifications made to the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0063] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A device for uniformly spreading rice and wheat straw using a combination of double-roller shovel and straight blade, characterized in that, include: A straw crushing mechanism for efficient straw crushing includes a crushing box with a feeding port at the front and a discharge port at the rear. A front crushing shaft and a rear crushing shaft are spaced apart along the straw feeding direction on the crushing box. One end of the front crushing shaft has a front sprocket and a crushing pulley. A front crushing roller is mounted on the front crushing shaft. Multiple straight blade groups A and swing blade groups A are alternately arranged along the circumference of the front crushing roller. Each straight blade group A includes multiple straight blades A spaced apart along the axial direction of the front crushing roller. Each swing blade group A is located between two straight blades A. The rear crushing... A rear sprocket is provided at one end of the crushing shaft. The rear sprocket is connected to the front sprocket by a chain. A rear crushing roller is provided on the rear crushing shaft. Multiple straight blade groups B and throwing blade groups B are alternately arranged along the circumference of the rear crushing roller. The straight blade group B includes multiple straight blade units spaced apart along the axial direction of the rear crushing roller. Each straight blade unit includes two straight blades B spaced apart. The throwing blade group B includes multiple throwing blade units spaced apart along the axial direction of the rear crushing roller. Each throwing blade unit includes two throwing blades B spaced apart. A straight blade A is located between two throwing blades B in the same throwing blade unit. A throwing blade A is located between two straight blades B in the same straight blade unit. A blower is used to blow chopped straw toward a swinging and evenly spreading mechanism. The swinging and evenly spreading mechanism is connected to the discharge port of the straw crushing mechanism through a material channel. The blower is located at the lower end of the straw crushing mechanism. A swing-type uniform spreading mechanism is used to uniformly spread chopped straw. It includes an installation plate set on a material channel. Multiple diversion plates are spaced apart on the installation plate along a direction perpendicular to the flow direction of the chopped straw. The diversion plates are rotatably mounted on the installation plate. A linkage support is provided at the upper end of the diversion plate. Two adjacent linkage supports are connected by a linkage rod. One of the linkage supports is rotatably connected to a swing guide rod. The other end of the swing guide rod is rotatably mounted on the installation plate. The swing guide rod is connected to a swing driver. The swing driver drives the diversion plates to swing back and forth through the swing guide rod and the linkage rod. The swing actuator includes a protective cover mounted on a mounting plate, an electric motor mounted on the protective cover, a crank connected to the electric motor, a sliding groove along the length of the swing guide rod, a slider in the sliding groove, and the crank and the slider being rotatably connected. The protective cover is provided with a guide groove, the electric motor is slidably mounted on the guide groove, the protective cover is provided with a linear stepper motor, the linear stepper motor is connected to the electric motor through a lead screw, the crank is provided with an adjustment groove along its length, a bushing is slidably mounted in the adjustment groove, and the electric motor is connected to the bushing.

2. The double-roller combined blade and straight blade rice and wheat straw uniform spreading device according to claim 1, characterized in that, The upper end of the diverter plate is provided with a folded edge, and the linkage support is disposed on the folded edge.

3. The double-roller combined shovel and straight-blade rice / wheat straw uniform spreading device according to claim 2, characterized in that, The diverter plate has a bent design in the middle, and the end of the diverter plate near the mounting plate is designed as an inclined end face. The mounting plate is provided with a guide groove to guide the linkage support.

4. A double-roller combined with straight blade rice and wheat straw uniform spreading device according to claim 1 or 3, characterized in that, The speed of the front crushing roller is less than that of the rear crushing roller.

5. The double-roller combined shovel and straight-blade rice / wheat straw uniform spreading device according to claim 4, characterized in that, The height of the rear crushing roller is less than the height of the front crushing roller.

6. The double-roller combined shovel and straight-blade rice / wheat straw uniform spreading device according to claim 5, characterized in that, The front and rear crushing shafts are respectively mounted on the crushing box via bearings and bearing seats.

7. The double-roller combined shovel and straight-blade rice / wheat straw uniform spreading device according to claim 6, characterized in that, The front crushing roller is provided with multiple straight knife seats A, and the straight knife A is provided on the straight knife seat A. The front crushing roller is provided with multiple swivel knife seats A, and swivel knives A are rotatably provided on the swivel knife seats A. The rear crushing roller is provided with multiple straight knife seats B, and two straight knives B are symmetrically provided on both sides of the straight knife seat B. The rear crushing roller is provided with multiple swivel knife seats B, and two swivel knives B are symmetrically rotatably provided on both sides of the swivel knife seats B.

8. A double-roller combined with a straight blade for uniformly spreading rice and wheat straw according to claim 1 or 7, characterized in that, The fan includes a housing, with air inlets on both sides and an air outlet at the top, which is connected to the discharge port. Bearing plates are provided on both sides of the housing, and fan bearing seats are provided on the bearing plates. A fan bearing is provided inside the fan bearing seats, and a fan shaft is provided on the fan bearing. Multiple fan plates are provided on the fan shaft, and a fan pulley is provided at one end of the fan shaft.

Images