A grain combine harvester

Abstract

This invention relates to a grain combine harvester, comprising a header, a walking system, a transmission system, a threshing and cleaning system, and a grain bin. The threshing and cleaning system is fixedly mounted on the walking system. The header is positioned in front of the walking system and communicates with the threshing and cleaning system. The grain bin is fixedly mounted on the walking system, located in front of the threshing and cleaning system, and communicates with it. The transmission system includes an engine, which is fixedly mounted at the rear end of the walking system. The engine is drively connected to the header and the threshing and cleaning system. This invention addresses the problem of inefficient overall structural layout in existing grain combine harvesters, solving the difficulty of achieving high efficiency and large feeding capacity in tracked harvesters. It redesigns the overall layout, overcoming the harvesting efficiency bottleneck of tracked harvesters and resolving the shortcoming of center of gravity shift in tracked harvesters, thus enabling the large-scale development of tracked harvesters.

Description

Technical Field

[0001] This invention relates to the field of grain harvesting technology, and in particular to a grain combine harvester. Background Technology

[0002] Influenced by national policies such as "land transfer and consolidation" and "rural labor migration to cities," land is now managed centrally through farms and cooperatives, and rising labor costs will significantly impact the market structure of tracked harvesters, leading to a greater market share for large or extra-large tracked harvesters.

[0003] Currently, the market for tracked conveyors is dominated by small to medium-sized products with a feeding capacity of 5-6 kg. Traditional single-sided longitudinal axial flow products are structurally limited, with the grain bin and threshing machine body distributed left and right, resulting in significant variations in the center of gravity. When the grain bin is empty, the center of gravity shifts to the left, and when it is full, it shifts to the right. During operation, the load on the drive axle and gearbox is significantly affected by the center of gravity, impacting reliability. Furthermore, the overall machine's passability is significantly affected by the shift in the center of gravity, impacting the reliability and lifespan of the tracks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a grain combine harvester that effectively overcomes the defects of the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A grain combine harvester includes a header, a traveling system, a transmission system, a threshing and cleaning system, and a grain bin. The threshing and cleaning system is fixedly mounted on the traveling system. The header is mounted in front of the traveling system and communicates with the threshing and cleaning system. The grain bin is fixedly mounted on the traveling system, located in front of the threshing and cleaning system, and communicates with the threshing and cleaning system. The transmission system includes an engine, which is fixedly mounted at the rear end of the traveling system. The engine is connected to the header and the threshing and cleaning system.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the walking system includes a chassis frame with multiple front-to-back support rollers arranged on the lower part of the chassis frame. Tracks are fitted over the support rollers. The system also includes a track tensioning device comprising a support cylinder, a connecting cylinder, and a tensioning wheel. The tensioning wheel is mounted on one end of the connecting cylinder, and the other end of the connecting cylinder extends into the support cylinder and slides within it. The system further includes a hydraulic cylinder support base, a tensioning cylinder, and a tensioning locking structure. Two hydraulic cylinder support bases are provided, respectively fixedly connected to the support cylinder and the connecting cylinder. The two ends of the tensioning cylinder are detachably connected to the two hydraulic cylinder support bases. The tensioning locking structure is mounted on the support cylinder and used to lock the relative position of the support cylinder and the connecting cylinder. The threshing and cleaning system and the grain bin are both mounted on the chassis frame.

[0009] Furthermore, the threshing and cleaning system includes a threshing machine body fixedly mounted on the walking system and a drum, a concave plate, a cleaning fan, a screen box, a grain auger, and a waste auger mounted on the threshing machine body. The cutting platform is connected to the front side of the drum. A concave plate is fitted on the outer side of the drum, and a straw discharge port is provided on its rear side. A shredder is provided at the straw discharge port. The screen box is located below the drum, and a cleaning screen is provided at its upper end. The cleaning fan is located at the bottom of the screen box. The front side of the bottom of the screen box is connected to the grain auger, the grain auger is connected to the grain bin, and the rear side of the bottom of the screen box is connected to the waste auger.

[0010] Furthermore, it also includes a waste recycling and re-threshing mechanism, which includes a grain elevator and a re-threshing mechanism. The grain elevator is mounted on the outside of one side of the threshing machine body, and its lower feed inlet is connected and communicates with the discharge end of the waste auger. The re-threshing mechanism is mounted on the upper part of one side of the threshing machine body, and its feed inlet is connected and communicates with the upper discharge outlet of the grain elevator. The re-threshing mechanism has a grain outlet on the side near the threshing machine body. The grain outlet passes through an adapted opening on one side of the threshing machine body and extends to the top of one side of the cleaning screen.

[0011] Furthermore, the cleaning fan includes a front fan and a rear fan. The front fan is located at the front of the screen box and below the front side of the cleaning screen, and its air outlet direction is inclined upward from front to back, penetrating the front middle area of ​​the cleaning screen. The rear fan is located at the rear of the screen box and below the rear section of the cleaning screen, and its air outlet direction is inclined upward from front to back, penetrating the rear area of ​​the cleaning screen.

[0012] Furthermore, it also includes a secondary fan, which is located at the front of the screen box and between the rear and upper part of the front fan and the front part of the cleaning screen. Its air outlet direction is inclined upward from front to back and passes through the front part of the cleaning screen.

[0013] Furthermore, it also includes an air guide plate, which includes an air guide base plate arranged horizontally at the front and back. The upper part of the middle area of ​​the air guide base plate is provided with a protruding triangular pyramid-shaped air guide part. The front end of the air guide part is a cone point, its rear end is a cone bottom end, and its left and right sides are two left and right symmetrical cone surfaces, and the two cone surfaces respectively form air guide surfaces.

[0014] Furthermore, the front fan includes a housing, a rotating shaft, multiple sets of crossflow blades, and multiple crossflow blades. The housing has an air inlet at either end of the left or right side, and an air outlet extending laterally towards both ends on its front side. A detachable baffle is installed at the air inlet. The rotating shaft is rotatably mounted in the housing in the left-right direction, with one end extending out of the corresponding end of the housing. A radial air inlet is provided on the upper part of the housing, and a cover plate is detachably provided at the radial air inlet. Multiple sets of crossflow blades are axially spaced on the rotating shaft. Multiple crossflow blades are detachably installed on the periphery of the multiple sets of crossflow blades and are distributed circumferentially spaced along the rotating shaft, with each crossflow blade extending axially along the rotating shaft.

[0015] Furthermore, the cleaning screen is detachably equipped with a hanging shaft perpendicular to it on both the left and right sides. The hanging shaft passes through the fitting mounting holes on both sides of the threshing machine body, and one end of the hanging shaft passing through the mounting hole is connected to a suspension component that is movably connected to the upper part of the corresponding side of the threshing machine body. A cover plate is detachably installed at the mounting hole. The cover plate has an oblong hole that passes through it along the front-back direction. The hanging shaft passes through the corresponding oblong hole. A sealing and shielding component that can move elastically along its axial direction is fitted on the hanging shaft. The sealing and shielding component fits against the inner side of the corresponding cover plate.

[0016] Furthermore, the grain bin includes two side boxes distributed to the left and right. Each side box can be independently rotated away from or towards the other side box. The opposing side walls of the two side boxes are open, and the two side boxes can be rotated to a closed state where the opposing side walls abut and communicate with each other. The upper part of one of the side boxes is provided with a grain inlet for grain auger communication. The grain inlet can be flipped relative to one side wall of the side box it is located on.

[0017] Furthermore, the shredder can be slidably mounted on the frame adapted to the rear end of the walking system and can be fixed to the frame by fasteners.

[0018] Furthermore, the grain combine harvester has an oil tank, which includes a main oil tank. The main oil tank is located on either the left or right side of the walking system and is rotatably mounted on the upper part of either the left or right side of the walking system via a flip-mount assembly. It can also be flipped to the upper or outer side of the walking system supported by an external force.

[0019] Furthermore, it also includes an auxiliary oil tank, which is installed on the rear side of the rice harvester chassis. The bottom wall of the auxiliary oil tank is at a lower level than the bottom wall of the main oil tank, and the two are connected to each other by an oil pipe at their bottoms.

[0020] The beneficial effects of this invention are: addressing the problem that the overall structural layout of existing grain combine harvesters is not reasonable enough, solving the problem that tracked harvesting machinery cannot break through the bottleneck of high efficiency and large feeding capacity, a new overall layout is designed to break through the harvesting efficiency bottleneck of tracked harvesters, solve the shortcoming of tracked machinery center of gravity offset, and make the development of tracked harvesting machinery into large-scale machines possible. Attached Figure Description

[0021] Figure 1 This is a side view of the structure of the grain combine harvester of the present invention;

[0022] Figure 2 This is a schematic diagram of the harvester chassis frame structure of the present invention;

[0023] Figure 3 for Figure 1 AA section diagram;

[0024] Figure 4 This is a front view of the tensioning wheel and connecting cylinder of the present invention;

[0025] Figure 5 This is a top view of the tensioning wheel and connecting cylinder of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the harvester before the tracks are tensioned according to the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the harvester track after tensioning according to the present invention; Figure 2 , 6 The structure shown within the area enclosed by the arc at the support cylinder in section 7 is the structure seen through the lens.

[0028] Figure 8 This is a schematic diagram of the internal structure of the grain combine harvester of the present invention;

[0029] Figure 9 This is a schematic diagram of the threshing and cleaning system of the present invention;

[0030] Figure 10 for Figure 9 Structural cross-sectional view of the middle BB surface;

[0031] Figure 11 for Figure 9 Structural cross-sectional view of the C-plane;

[0032] Figure 12This is a layout diagram of the cleaning fan of the present invention;

[0033] Figure 13 This is a three-dimensional structural view of the air guide plate of the present invention;

[0034] Figure 14 This is a side view of the structure of the air guide plate of the present invention;

[0035] Figure 15 This is a schematic diagram of the air guide plate of the present invention being assembled in the screen box;

[0036] Figure 16 This is a schematic diagram of the internal structure of the crossflow and axial flow composite fan (front fan) of the present invention;

[0037] Figure 17 This is a schematic diagram of the cross-flow and through-flow composite fan (front fan) of the present invention assembled in a grain thresher;

[0038] Figure 18 This is a partial structural diagram of the crossflow and through-flow composite fan (front fan) of the present invention assembled in a grain thresher;

[0039] Figure 19 This is a schematic diagram of the assembly structure of the sieve box of the present invention;

[0040] Figure 20 This is a schematic diagram of the structure of the sealing and shielding component of the present invention in conjunction with the side wall of the threshing machine body;

[0041] Figure 21 for Figure 20 Enlarged view of the structure of section D in the middle;

[0042] Figure 22 This is a schematic diagram of the sieve box of the present invention during the initial installation stage;

[0043] Figure 23 This is a schematic diagram of the front structure of the split saddle-type rotatable grain bin of the present invention;

[0044] Figure 24 This is a schematic diagram of the rear structure of the split saddle-type rotatable grain bin of the present invention.

[0045] Figure 25 This is a top view of the split saddle-type rotatable grain bin of the present invention in its open or closed state.

[0046] Figure 26 This is a front view of the split saddle-type rotatable grain bin of the present invention in its closed state.

[0047] Figure 27 This is a schematic diagram of the connection between the pull rod and the machine body of the present invention;

[0048] Figure 28This is a schematic diagram of the shredder mounting structure of the present invention;

[0049] Figure 29 This is a partial enlarged view of the shredder mounting structure of the present invention;

[0050] Figure 30 This is a simplified structural diagram of the harvester side-mounted device of the present invention;

[0051] Figure 31 This is a side view of the structure of the oil tank in this invention, installed on the side of the harvester.

[0052] The attached diagram lists the components represented by each number as follows:

[0053] 11. Support cylinder; 12. Connecting cylinder; 13. Tensioning wheel; 14. Tensioning cylinder; 15. Cylinder support seat; 16. Tensioning screw; 17. Nut sleeve; 18. Positioning sleeve; 19. U-shaped connecting plate; 110. Guide wheel; 111. Connecting arm; 112. Chassis frame; 113. Track; 114. Track roller;

[0054] 21. Threshing machine body; 22. Drum; 23. Concave plate; 24. Screen box; 25. Grain auger; 26. Impurity auger; 27. Grain elevator; 28. Re-threshing mechanism; 29. ​​Cleaning screen; 200. Guide plate; 281. Threshing drum; 282. Rotary shaft; 283. Spiral blades; 284. Re-threshing teeth; 285. Throwing plate; 2811. Shell; 2812. Re-threshing ribs;

[0055] 210. Front fan; 211. Rear fan; 212. Auxiliary fan; 241. Mounting slot area; 242. Air volume regulator; 294. Rolling parts;

[0056] 2101. Housing; 2102. Shaft; 2103. Crossflow blades; 2104. Through-flow blades; 2105. Blocking plate; 2106. Cover plate; 2107. Connecting seat;

[0057] 4. Air guide plate; 41. Air guide base plate; 42. Air guide section; 411. Flow guide plate; 421. Triangular plate;

[0058] 51. Hanging shaft; 52. Suspension assembly; 53. Cover plate; 54. Sealing and shielding assembly; 55. Slide rail; 511. Mounting flange; 521. Hanging rod; 522. Connecting seat; 531. Oval hole; 541. Elastic element; 542. Pressure plate; 543. Wear-resistant layer;

[0059] 61. Side box; 62. Column; 63. Buckle; 65. Tie rod; 66. Grain cylinder; 67. Fixed frame; 611. Grain inlet; 621. Connecting rod; 613. Sealing strip; 614. Grain outlet; 661. Sprinkler; 662. Conveying mechanism; 615. Sealing plate; 6111. Cover;

[0060] 71. Grain unloading auger; 72. Grain storage box; 73. Transmission gear;

[0061] 8. Chopper; 81. Mounting bracket; 82. Fastener; 83. Track; 84. Sliding component; 811. Diagonal brace;

[0062] 91. Main oil tank; 92. Tilting installation assembly; 93. Longitudinal beam; 94. Auxiliary oil tank; 95. Oil pipe; 921. Support rod; 922. Fastener; 923. Locking component; 924. Collar. Detailed Implementation

[0063] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0064] Example 1

[0065] like Figure 1 As shown, the grain combine harvester of this embodiment includes a header a, a walking system, a transmission system, a threshing and cleaning system, and a grain bin c. The threshing and cleaning system is fixedly mounted on the walking system. The header a is mounted in front of the walking system and communicates with the threshing and cleaning system. The grain bin c is fixedly mounted on the walking system, located in front of the threshing and cleaning system, and communicates with the threshing and cleaning system. The transmission system includes an engine b, which is fixedly mounted at the rear end of the walking system. The engine b is connected to the header a and the threshing and cleaning system via a transmission connection.

[0066] In this embodiment, the overall space layout is reasonable, the structure is compact, and the weight is light. This improves the center of gravity of existing machines, making the load more reasonable when the machine is working, the machine runs more smoothly, and the lifespan is longer.

[0067] Example 2

[0068] like Figures 2 to 7As shown, a relatively reasonable walking system was designed based on Embodiment 1. Specifically, it includes a chassis frame 112, with multiple front and rear distributed support rollers 114 arranged on the lower part of the chassis frame 112. Tracks 113 are sleeved on the multiple support rollers 114. It also includes a track tensioning device, which includes a support cylinder 11, a connecting cylinder 12, and a tensioning wheel 13. The tensioning wheel 13 is installed at one end of the connecting cylinder 12, and the other end of the connecting cylinder 12 extends into the support cylinder 11 and slides in fit. It also includes a hydraulic cylinder support seat 15, a tensioning cylinder 14, and a tensioning locking structure. There are two hydraulic cylinder support seats 15, which are fixedly connected to the support cylinder 11 and the connecting cylinder 12, respectively. The two ends of the tensioning cylinder 14 are detachably connected to the two hydraulic cylinder support seats 15, respectively. The tensioning locking structure is installed on the support cylinder 11 and is used to lock the relative position of the support cylinder 11 and the connecting cylinder 12. The threshing and cleaning system and the grain box c are both mounted on the chassis frame.

[0069] In this embodiment, the machine adopts a tracked walking mechanism, which is more conducive to good passage through various terrains. The tensioning cylinder 14 first pushes the tensioning wheel 13 into place, and then the tensioning locking structure is used to position the tensioning wheel 13 to achieve track tensioning 113. Specifically, the installation position of the tensioning cylinder 14 is reserved in advance, and the cylinder support seat 15 is installed. When changing the track 113, the two ends of the tensioning cylinder 14 are connected to the cylinder support seat 15. Through the hydraulic system of the whole vehicle, the tensioning cylinder 14 extends to achieve the purpose of track tensioning 113. Then the tension locking structure locks it, and then the tensioning cylinder 14 can be removed. When tensioning is needed, a pre-prepared portable tensioning cylinder 14 is installed through the cylinder support seat 15, or an original cylinder from other parts of the harvester is removed and installed. The hydraulic oil of the whole machine's hydraulic system is connected to the installed cylinder through the oil circuit interface to perform the tensioning step. The installation is convenient, a single person can operate independently to achieve track tensioning 113, and the cost is also low. The track tensioning device of the present invention is applicable to tracked harvesters, especially rice harvesters, and is also applicable to other machines that require track tensioning 113.

[0070] For the tensioning and locking structure, there are two feasible solutions:

[0071] (1) The tensioning and locking structure includes an external insertion hole on the support cylinder 11, a plurality of internal insertion holes arranged axially at intervals on the connecting cylinder 12, and a pin. The pin can be inserted into the external insertion hole and any one of the internal insertion holes. The tensioning and locking structure can adopt a pin-insertion type. When the tensioning cylinder 14 pushes the tensioning wheel 13 into place, the external insertion hole and one of the internal insertion holes are aligned. The pin is directly inserted into the external insertion hole and this internal insertion hole, locking the relative position of the support cylinder 11 and the connecting cylinder 12 so that the two will not detect relative displacement. The tensioning wheel 13 can then be fixed in its position, completing the tensioning. However, this technical solution is prone to damage because the pin will bear the huge pressure of the lateral track 113 pressing on the tensioning wheel 13. Although the operation is the simplest, the structural stability is insufficient.

[0072] (2) The tensioning and locking structure includes a tensioning screw 16 and a nut sleeve 17. One end of the support cylinder 11 is closed and the other end is open. The other end of the connecting cylinder 12 extends into the support cylinder 11 from the other end. One end of the tensioning screw 16 rotatably passes through one end of the support cylinder 11 and extends sequentially to the interior of the support cylinder 11 and the interior of the other end of the connecting cylinder 12. The tensioning screw 16 is threaded with a nut sleeve 17 on the part inside the support cylinder 11. The nut sleeve 17 moves axially along the support cylinder 11 as the tensioning screw 16 rotates and abuts against the other end of the connecting cylinder 12. A positioning sleeve 18 is fixedly fitted at the position where the tensioning screw 16 passes through one end of the support cylinder 11 to abut against the inner wall of one end of the support cylinder 11. The other end of the tensioning screw 16 is located outside the support cylinder 11. The tensioning locking structure can also be a threaded tensioning screw 16 and a nut sleeve 17. The tensioning screw 16 is pressed against one end of the support cylinder 11 by the positioning sleeve 18. Tightening the other end of the tensioning screw 16 causes it to rotate, which in turn moves the nut sleeve 17 axially along the support cylinder 11, causing it to press against the other end of the connecting cylinder 12. Since the track 113 presses against one end of the connecting cylinder 12 through the tensioning wheel 13, the position of the connecting cylinder 12 is fixed, completing the tensioning. In this scheme, the pressure of the track 113 pressing against the tensioning wheel 13 is borne by the nut sleeve 17, which is threadedly connected to the tensioning screw 16. The tensioning screw 16 is pressed against one end of the support cylinder 11 by the positioning sleeve 18. The forces are all acting coaxially without lateral dispersion. As long as the strength of each component is sufficient, the tensioning effect can be guaranteed, and it is not easy to be damaged. Although the operation is slightly complicated, it is still the preferred solution.

[0073] If the tension cylinder 14 is not used to pre-push the tension wheel 13 into position, the tension locking structure alone can also be used to tension the track 113. However, the tension screw 16 has significant friction due to its contact with both the positioning sleeve 18 and the nut sleeve 17, which affects its rotation. A very large force is required to drive the tension screw 16, and due to space constraints in other structures, the tightening amplitude is small each time, resulting in a long tensioning time, making it difficult for a single person to operate, and the tensioning effect is also poor. Therefore, using the tension cylinder 14 to pre-push the tension wheel 13 into position before using the tension locking structure to lock it is the optimal technical solution.

[0074] Based on the aforementioned threaded tensioning and locking structure, the other end of the tensioning screw 16 is configured as a hexagonal nut structure that is easy to tighten, and a positioning pin is also inserted thereon. After the tensioning cylinder 14 pushes the tensioning wheel 13 into place in advance, the positioning sleeve 18 and nut sleeve 17 on the tensioning screw 16 are not yet in contact at this time, so they are relatively loose. Initially, the tensioning screw 16 can be turned by hand. When the positioning sleeve 18 and nut sleeve 17 are close to contact, it will be more difficult to tighten the tensioning screw 16 at this time, and a tool is required. Based on this, the other end of the tensioning screw 16 can be configured as a hexagonal nut structure that is easy to tighten. By tightening it a few times with a wrench, the track 113 can be tightened quickly and easily. After tightening, a positioning pin can be inserted into the hexagonal nut structure for positioning.

[0075] Based on the above-mentioned threaded tensioning and locking structure, when the tensioning screw 16 rotates, the nut sleeve 17 connected to it by the thread cannot rotate with the tensioning screw 16. After being restricted from rotating, it can move along the axial direction of the support cylinder 11 and abut against the end of the connecting cylinder 12 to achieve the tensioning of the track 113. According to the shape of the support cylinder 11 and the connecting cylinder 12, a corresponding limiting structure can be designed.

[0076] If both the support cylinder 11 and the connecting cylinder 12 are cylindrical, the nut sleeve 17 may not be able to be stuck on the inner wall of the support cylinder 11 at the outer edge. Therefore, a strip hole can be provided on the support cylinder 11 along the axial direction, and a positioning protrusion is fixedly provided on the nut sleeve 17 and slidably connected in the strip hole. The positioning protrusion is stuck in the strip hole, which restricts the nut sleeve 17 from rotating with the tensioning screw 16.

[0077] If both the support cylinder 11 and the connecting cylinder 12 are square tubes, a square positioning plate can be directly fixedly connected to the nut sleeve 17. The size of the positioning plate is basically the same as the inner size of the support cylinder 11. The positioning plate is stuck on the inner wall of the support cylinder 11 in the circumferential direction, so the nut sleeve 17 will not rotate with the tensioning screw 16. The positioning plate and the inner wall of the support cylinder 11 can slide axially against each other. The positioning plate slides with the inner wall of the support cylinder 11 in the axial direction, and the nut sleeve 17 can move along the axial direction of the support cylinder 11 to abut against the end of the connecting cylinder 12.

[0078] Preferably, the two cylinder support seats 15 are respectively located at the end of the support cylinder 11 away from the tensioning wheel 13 and the end of the connecting cylinder 12 close to the tensioning wheel 13. Using the method of pre-pushing the tensioning wheel 13 with the tensioning cylinder 14 requires sufficient space for tensioning the cylinder 14. Considering the actual space and the size of the tensioning cylinder 14, it is more appropriate to set the two cylinder support seats 15 at opposite ends that are axially far apart.

[0079] Preferably, the tensioning wheel 13 is mounted on one end of the connecting cylinder 12 via a U-shaped connecting plate 19. The closed end of the U-shaped connecting plate 19 is fixedly connected to one end of the connecting cylinder 12, and the hydraulic cylinder support 15 is fixedly connected thereon. The tensioning wheel 13 is rotatably mounted between the open ends of the U-shaped connecting plate 19. With the tensioning wheel 13 mounted on one end of the connecting cylinder 12 via the U-shaped connecting plate 19, the hydraulic cylinder support 15 can be positioned on the U-shaped connecting plate 19.

[0080] Preferably, the support cylinder 11 is connected to a guide wheel 110 via a connecting arm 111. One end of the connecting arm 111 is fixedly connected to the support cylinder 11, and the other end of the connecting arm 111 is connected to the rotatable guide wheel 110. The hydraulic cylinder support seat 15 is fixedly connected to the side of the connecting arm 111 near the tension wheel 13. The guide wheel 110 required for the normal operation of the track 113 is installed on the support cylinder 11 via the connecting arm 111. At this time, the hydraulic cylinder support seat 15 can be located on the connecting arm 111.

[0081] Example 3

[0082] Based on Example 1, such as Figure 8 As shown, the threshing and cleaning system includes a threshing body 21 fixedly mounted on the walking system and a drum 22, a concave plate 23, a cleaning fan, a screen box 24, a grain auger 25, and a waste auger 26 mounted on the threshing body 21. The cutting platform a is connected to the front side of the drum 22. The outer side of the drum 22 is fitted with a concave plate 23, and a straw discharge port is provided on its rear side. A shredder 8 is provided at the straw discharge port. The screen box 24 is located below the drum 22, and a cleaning screen 29 is provided at its upper end. The cleaning fan is located at the front end of the screen box 24, and it blows air towards the rear and upper side of the cleaning screen 29, penetrating the screen surface of the cleaning screen 29. The bottom front side of the screen box 24 is connected to the grain auger 25, the grain auger 25 is connected to the grain bin d, the bottom rear side of the screen box 24 is connected to the waste auger 26, and the grain auger 25 is connected to the front side of the drum 22.

[0083] In this embodiment, the chassis frame 112 is not provided. Instead, the threshing machine body 21 and the chassis frame are combined into one to form a structural frame for the installation of other components, resulting in a more compact structural layout.

[0084] This embodiment addresses the problem of insufficient overall structural layout in existing small axial flow wheel grain combine harvesters by changing the overall layout, rationally setting up various functional components, and arranging more structures within a limited space, making the whole machine more in line with the requirements of miniaturization.

[0085] In Example 3, the transmission connection refers to the linkage of various components through transmission components such as belts or chains, so as to realize the function of each component. The connection is the transmission of materials from one component to another.

[0086] Example 4

[0087] Based on Example 3, such as Figure 9 and 10 As shown, it also includes a waste recycling and re-threshing mechanism, which includes a grain elevator 27 and a re-threshing mechanism 28. The grain elevator 27 is mounted on the outside of one side of the threshing machine body 21, and its lower feed inlet is connected and communicates with the discharge end of the waste auger 26. The re-threshing mechanism 28 is mounted on the upper part of one side of the threshing machine body 21, and its feed inlet is connected and communicates with the upper discharge outlet of the grain elevator 27. The re-threshing mechanism 28 has a grain outlet on the side near the threshing machine body 21. The grain outlet passes through an adapted opening on one side of the threshing machine body 21 and extends to the top of one side of the cleaning screen.

[0088] Specifically, the harvested grain enters the drum 22, where it is threshed by compression. Because the sieve holes on the concave plate 23 are denser at the front and sparser at the back, the threshed grains fall onto the cleaning sieve 29 below at the front and middle of the concave plate 23. After passing through the sieve, the grains fall into the grain collection area at the bottom of the sieve box 24. The remaining grains after threshing fall through the rear of the concave plate 23 to the remaining grain collection area at the bottom of the sieve box 24, and are then conveyed by the remaining grain auger 26 to the grain elevator 27, which then lifts and conveys them to the upper part of the sieve box. The grains are threshed again in the re-threshing mechanism 28. After threshing, the grains fall onto the cleaning screen through the grain outlet, and the impurities are discharged. The impurities generated by the threshing machine are re-threshed in the re-threshing mechanism 28 throughout the process, which does not affect the normal threshing of the threshing machine, does not increase the load on the drum 22 and the cleaning screen 29, and can effectively improve the situation of impurity discharge leading to grain loss. The re-threshing capacity of the entire device is enhanced, which can adapt to various types of difficult-to-thresh rice and prevent impurities from circulating back and forth between the screen box and the impurities.

[0089] It should be noted that: generally, both the grain collection area and the waste collection area are grooves with a gradually narrowing bottom.

[0090] Preferably, the aforementioned miscellaneous auger 26 is a horizontally arranged screw conveyor.

[0091] More specifically, the waste auger 26 uses a conventional screw conveyor, with a portion of its shell located in the waste collection area having an open design to facilitate the smooth transport of waste into its interior.

[0092] As a preferred embodiment, the grain elevator 27 is a vertically arranged screw conveyor.

[0093] In this scheme, the grain elevator 27 adopts a conventional screw conveyor, which has a relatively stable conveying effect.

[0094] In a preferred embodiment, the aforementioned re-threshing mechanism 28 includes a horizontally arranged threshing drum 281, a rotating shaft 282, spiral blades 283, re-threshing teeth 284, and a throwing plate 285. One end of the threshing drum 281 has a feed inlet, which is connected and communicates with the discharge port of the grain elevator 27. The rotating shaft 282 is rotatably disposed within the threshing drum 281, and one end is connected to a power device for driving its rotation. The outer periphery of the rotating shaft 282 corresponding to the discharge port of the grain elevator 27 is provided with… The spiral blade 283 has a plurality of throwing plates 285 arranged radially and vertically on the outer periphery of its other end. The throwing plates 285 are all arranged circumferentially and vertically along the shaft 282. The surface of the shaft 282 located between the spiral blade 283 and the throwing plates 285 is covered with the double threshing teeth 284. The threshing drum 281 is hollowed out on one side wall corresponding to the throwing plates 285. The side of the threshing drum 281 near the grain thresher is covered with grain holes, which together constitute the grain outlet.

[0095] In this scheme, the impurities enter one end of the feed inlet of the threshing drum 281 through the grain elevator 27, and are then conveyed to the other end of the threshing drum 281 by the rotation of the spiral blades 283 on the rotating shaft 282. During the conveying process, the impurities are subjected to secondary extrusion and threshing through the secondary extrusion teeth 284 area of ​​the rotating shaft 282. The extruded grains pass through the sieve at the outlet and fall onto the cleaning sieve 29. The remaining part is thrown out at the other end of the threshing drum 32 by the rotating throwing plate 285. The overall structure is relatively reasonable and can effectively perform secondary extrusion of impurities.

[0096] It should be noted that the other end of the threshing drum 281 is hollowed out on the side facing away from the threshing machine, while the other side is closed to ensure that the impurities after secondary threshing can be discharged smoothly.

[0097] Of course, an installation area for assembling the threshing drum 281 can be provided on one side of the threshing machine, and this installation area can be a shell structure.

[0098] It should be noted that in this embodiment, the shafts of the waste auger 26, the grain elevator 27, and the re-threshing mechanism 28 can be linked together by belt or chain drive pairs, that is, the three can share a power device, or they can be provided with separate power mechanisms for the shafts of each device to rotate.

[0099] As a preferred implementation method, such as Figure 11 As shown, the threshing drum 281 is composed of two shells 2811 with a semi-circular cross-section spliced ​​together. One of the shells 2811 passes through an adapted opening on one side of the grain thresher, and its surface is covered with the aforementioned grain holes.

[0100] In this embodiment, the threshing drum 281 adopts a combined shell structure, which has a simple manufacturing process and is relatively easy to assemble.

[0101] Preferably, a plurality of multiple threshing protrusions 2812 are uniformly provided on the inner wall of the threshing drum 281 along its circumference, and each of the multiple threshing protrusions 2812 is arranged along the axial direction of the threshing drum 281.

[0102] In this scheme, the design of the secondary threshing strip 2812 can improve the effect of secondary threshing of impurities, resulting in more thorough threshing.

[0103] In a preferred embodiment, a guide plate 200 is also included. The guide plate 200 is disposed inside one side of the grain thresher, with one end located below the grain outlet of the re-threshing mechanism 28 and the other end extending downward at an angle above the cleaning screen 29.

[0104] In this embodiment, the guide plate 200 is provided so that the grain grains that have passed through the grain outlet can slide smoothly down the guide plate 200 onto the cleaning screen 29 for cleaning and collection.

[0105] Example 5

[0106] Based on Example 3, such as Figure 12 As shown, the cleaning blower includes a front blower 210 and a rear blower 211. The front blower 210 is located on the front side of the screen box 24 and below the front side of the cleaning screen 29. Its air outlet direction is inclined upward from front to back and penetrates the front middle area of ​​the cleaning screen 29. The rear blower 211 is located at the rear of the screen box 24 and below the rear section of the cleaning screen 29. Its air outlet direction is inclined upward from front to back and penetrates the rear area of ​​the cleaning screen 29.

[0107] In this embodiment, the air blown by the front fan 210 covers the front and middle sections of the cleaning screen 29 (the arrows in the attached diagram indicate the wind direction), ensuring that the impurities in the front and middle sections are swept away. The air blown by the rear fan 211 can cover the rear or middle-rear section of the cleaning screen 29, ensuring that even if the feed rate of the thresher is increased, the rear section of the cleaning screen 29 can still be well covered for cleaning, ensuring the effectiveness of impurity removal and improving the situation where the amount of impurities in the rear section of the screen box 24 of the existing equipment is large and easily accumulates, affecting the cleaning operation.

[0108] Specifically: The addition of a rear fan 211 at the tail end allows upward airflow in the impurity section of the rear section of the screen box 24, compensating for velocity and pressure losses and improving cleaning capacity.

[0109] Example 6

[0110] Based on Example 5, such as Figure 12 As shown, it also includes an auxiliary fan 212, which is located at the front of the screen box and between the rear and upper part of the front fan 210 and the front part of the cleaning screen 4. Its air outlet direction is inclined upward from front to back and passes through the front part of the cleaning screen 4.

[0111] In this embodiment, the air blown out by the auxiliary fan 212 is tilted backward and penetrates the front section of the cleaning screen, which can effectively solve the problem of high-yield crops accumulating in front of the screen and make the removal of impurities more effective.

[0112] Preferably, the aforementioned front fan 210, rear fan 211 and auxiliary fan 212 are all fans using existing technology, which can be directly installed inside the screen box.

[0113] Of course, one or more of the front fan 210, rear fan 211 and auxiliary fan 212 can be set according to the actual situation. When multiple are set, they can be arranged in a side-by-side and spaced manner or other more reasonable ways.

[0114] In a preferred embodiment, the rear end of the bottom of the screen box 24 is provided with a recessed mounting groove area 241, and a slot is formed on the upper rear side of the mounting groove area 241. The rear fan 211 is disposed in the mounting groove area 241 and exhausts air through the slot of the mounting groove area 241.

[0115] In this embodiment, the installation slot area 241 facilitates the proper assembly of the rear fan 211. Furthermore, the installation slot area 241 defines the slot opening as an air outlet, thus defining the approximate air outlet direction of the rear fan 211, preventing the rear fan 211 from scattering its airflow, and improving the cleaning effectiveness of the rear fan 211.

[0116] In a preferred embodiment, the slot opening of the mounting slot area 241 is provided with a wind direction and air volume regulator 242, which is used to adjust the air volume and wind direction blown out through the slot opening of the mounting slot area 241.

[0117] In this embodiment, the air direction and air volume regulator 242 can fine-tune the size of the slot in the mounting slot area 241. Specifically, with the upper edge of the slot fixed, adjusting the distance between the lower edge and the upper edge of the slot, as well as the position of the lower edge, can adjust the air volume of the air coming out of the slot and fine-tune the direction of the airflow, making the operation quite flexible.

[0118] More specifically, the aforementioned airflow and air volume regulator 242 is a valve plate located at the lower rear side of the slot opening of the aforementioned mounting groove area 241. The valve plate can be moved up and down to adjust the size of the slot opening of the aforementioned mounting groove area 241, thereby adjusting the airflow and airflow direction blown out of the slot opening of the aforementioned mounting groove area 241.

[0119] In this design, the wind direction and air volume regulator 242 adopts a traditional valve plate component, which is simple and convenient to operate.

[0120] Ideally, the valve plate is tilted upwards and to the front. This tilting arrangement allows for effective adjustment of the slot size and the plane on which the slot is located during valve plate movement, resulting in a significant effect of fine-tuning the airflow direction.

[0121] Generally, either the left or right end of the valve plate is connected to a connecting rod that extends out of the grain thresher. The connecting rod can drive the valve plate to move up and down along the rear side of the groove opening of the mounting groove area 241. The valve plate can be moved and adjusted from outside the thresher, making the operation simpler, more convenient and faster.

[0122] Generally, the bottom wall of the screen box, corresponding to the front side of the mounting groove area 241, is curved and extends upward towards the rear of the grain thresher.

[0123] In principle, the bottom wall of the screen box extends upwards along the rear end of the thresher. The overall inclined setting of the bottom wall is conducive to guiding the airflow blown out by the front fan 210, so that it keeps blowing out upwards and backwards to penetrate the cleaning screen, and there will be no downward dispersion loss.

[0124] Example 7

[0125] Based on Example 5, such as Figure 13 , 14As shown in Figure 15, it also includes an air guide plate 4, which is installed in the screen box 24 and located behind the air outlet of the front fan 210. The air guide plate 4 includes an air guide base plate 41 arranged horizontally at the front and rear. The upper part of the middle area of ​​the air guide base plate 41 is provided with a protruding triangular pyramid-shaped air guide part 42. The front end of the air guide part 42 is a cone point, its rear end is a cone bottom end, and its left and right sides are two left and right symmetrical cone surfaces, and the two cone surfaces form air guide surfaces respectively. The front end of the air guide part 42 is close to the middle of the air outlet of the front fan 210.

[0126] In this embodiment, the two sides of the intersecting ridge lines (represented by a in the figure) of the left and right sides of the air guide 42 form two airflow pressure distribution zones. The airflow enters from the upper surface of the front end of the air guide base plate 41, is split by the protruding ridge lines, and flows to the two airflow pressure distribution zones respectively. Finally, it flows out evenly behind the air guide surfaces on both sides through the two airflow pressure distribution zones. This design is very reasonable and the structure is reasonable. The airflow entering from the front end has a higher wind pressure in the middle and a more uniform pressure distribution in the lateral airflow. When the airflow flows out at the rear end of the airflow pressure distribution zones on both sides, the pressure distribution is more uniform, reducing the suction area on both sides of the rear end. In addition, the air guide plate 4 is installed at an upward angle towards the rear. This angle is consistent with the wind direction of the front fan 210, which can reduce wind resistance and ensure a good pressure distribution effect of the airflow. The installation of the air guide plate 4 can improve the phenomenon of uneven lateral airflow and pressure distribution in the cross-section of the fan outlet of traditional harvesters, thereby improving the grain cleaning effect of the harvester and improving the operating efficiency and economic benefits of the harvesting machinery.

[0127] Preferably, the air guide 42 is an isosceles triangular pyramidal component. The plane at the rear end of the air guide 42 is perpendicular to the upper surface of the air guide base plate 41. The two sides of the air guide 42 are symmetrical to each other, and the shape design is more reasonable, resulting in more uniform airflow distribution.

[0128] Generally, the aforementioned air guide plate 41 is a rectangular plate, and its front and rear edge lines extend in the left and right directions.

[0129] In a preferred embodiment, the air guide portion 42 includes two triangular plates 421 of the same size. The two triangular plates 421 are arranged symmetrically from left to right, and one side of the two plates is connected in the front-back direction above the middle of the air guide base plate 41 (forming a ridge line s). The other side of the two triangular plates 421 is connected to the upper left and right sides of the air guide base plate 41 respectively. The plane containing the remaining side of the two plates constitutes the conical bottom end of the air guide portion 42.

[0130] In this embodiment, the air guide 42 is designed as a hollow component formed by splicing together each other, which is lightweight, requires less material, has low production cost, and is easier to install.

[0131] Generally, the air guide plate 41 and the triangular plate 421 are both stainless steel plates, which are welded together.

[0132] Of course, the area of ​​the air guide plate 41 corresponding to the air guide part 42 can also be designed as a hollow surface to reduce material consumption.

[0133] In addition, the aforementioned air guide plate 41 only needs to ensure that its upper part is flat, while its lower part can be a protruding irregular contour structure to facilitate installation.

[0134] Generally, the intersection point of the two triangular plates 421 at their rear ends and the foot of the perpendicular between them and the bottom plate 41, as well as the front cone point of the air guide section 42, are on the same plane. Furthermore, the intersection point of the two triangular plates 421 at their rear ends and the ridge line s form an angle of 45°-60° (see angle α in the figure for details).

[0135] To reduce wind resistance, all joints between surfaces are rounded.

[0136] Preferably, the rear end of the aforementioned air guide plate 41 is provided with a guide plate 411 that slopes downwards and backwards along its edge.

[0137] In this scheme, the design of the guide plate 411 can constrain the flow direction of the airflow after the uniform pressure distribution at the rear end of the guide plate to a certain extent.

[0138] Example 8

[0139] Based on Example 5, such as Figure 16 , 17 As shown in Figure 18, the front fan 210 is configured as a cross-flow and cross-flow composite fan, and the specific structure of the cross-flow and cross-flow composite fan is as follows:

[0140] The unit includes a housing 2101, a rotating shaft 2102, multiple sets of crossflow blades 2103, and multiple crossflow blades 2104. The housing 2101 has an air inlet at one or both ends, and an air outlet extending laterally towards both ends on one side. A detachable baffle 2105 is installed at each air inlet. The rotating shaft 2102 is rotatably mounted laterally within the housing 2101, with one end extending beyond the corresponding end of the housing 2101. 01 The upper part is provided with a radial air inlet, and a cover plate 53106 is detachably provided at the radial air inlet. Multiple sets of the above-mentioned crossflow blades 2103 are axially spaced on the above-mentioned rotating shaft 2102. Multiple sets of the above-mentioned crossflow blades 2104 are detachably installed on the periphery of the multiple sets of the above-mentioned crossflow blades 2103 and are distributed circumferentially spaced along the above-mentioned rotating shaft 2102. Each set of the above-mentioned crossflow blades 2104 extends axially along the above-mentioned rotating shaft 2102.

[0141] The cross-flow and axial flow combined fan in this embodiment can switch between two operating states, as detailed below:

[0142] 1) When used as a crossflow centrifugal fan, remove the blocking plate 2105 and all the crossflow blades 2104, and install the cover plate 53106 to ensure that the fan takes in air from the air inlets at both ends and exits air from the air outlet at the side end, and is used as a traditional crossflow fan.

[0143] 2) Used as a cross-flow centrifugal fan, install the blocking plate 2105 and cross-flow blades 2104, and remove the cover plate 53106 to ensure that the fan takes in air from the radial air inlet and exits air from the side air outlet, and is used as a simple cross-flow fan.

[0144] When this cross-flow and through-flow combined fan is used in a grain thresher, it should be installed at the position of the front fan 210. When different air volumes are required, different modes (cross-flow or through-flow) can be flexibly switched to obtain different air volumes and cleaning effects.

[0145] The fan in this embodiment can be flexibly adjusted to achieve the purpose of two types of fans. The overall structure is reasonably designed and can flexibly adjust the two air intake and exhaust modes, namely cross flow or through flow, so as to adapt to the flexible use in different occasions. The overall operation is simple and convenient.

[0146] Preferably, the cross-section of the aforementioned cross-flow blade 2104 is curved, and the multiple cross-flow blades 2104 have the same specifications, and the multiple cross-flow blades 2104 are distributed in the same direction around the aforementioned cross-flow blade 2103.

[0147] In this design, the cross-flow blade 2104 is designed with reference to the shape of existing cross-flow blades 2104 on the market. Specifically, it adopts a blade design with a circular arc cross section to ensure good airflow.

[0148] Ideally, the cross-section of the aforementioned cross-flow blade 2104 is arc-shaped.

[0149] The above-mentioned cross-flow blades 2104 are distributed in the same direction around the above-mentioned cross-flow blades 2103, which means that the radial extension direction of the blades 4 is uniformly distributed in a clockwise or counterclockwise direction.

[0150] More preferably, each set of crossflow blades 2103 is provided with a plurality of connecting seats 2107 that correspond one-to-one with the crossflow blades 2104 along its circumferential direction. The crossflow blades 2104 are detachably connected to the corresponding connecting seats 2107 by bolts.

[0151] In this scheme, the cross-flow blade 2104 is connected to the corresponding bolt hole on the connecting seat 2107 by a bolt that passes through it, and the connection method is simple and quick.

[0152] Ideally, in this embodiment, the number of the aforementioned cross-flow blades 2104 is 8-10.

[0153] In a preferred embodiment, the housing 2101 includes an upper half-shell and a lower half-shell that are spliced ​​together. The lower half-shell has the air outlet on one side, and the upper half-shell constitutes the cover plate 53106.

[0154] In this embodiment, the housing 2101 adopts a modular structure design, which is simple to manufacture and easy to assemble.

[0155] Example 9

[0156] Based on Example 3, such as Figure 19 , 20 As shown in Figures 21 and 22, the cleaning screen 29 is detachably equipped with a hanging shaft 51 perpendicular to it on both the left and right sides. The hanging shaft 51 passes through the fitting mounting holes on both sides of the threshing machine body 21, and one end of the hanging shaft passing through the mounting hole is connected to a suspension component 52 that is movably connected to the upper part of the corresponding side of the threshing machine body. A cover plate 53 is detachably installed at the mounting hole. The cover plate 53 has an oblong hole 531 that passes through it along the front-back direction. The hanging shaft 51 passes through the corresponding oblong hole 531. A sealing and blocking component 54 that can move elastically along its axial direction is fitted on the hanging shaft 51. The sealing and blocking component 54 is in contact with the inner side of the corresponding cover plate 53.

[0157] In this embodiment, generally, a drive mechanism connected to the hanging shaft is provided on the outside of the threshing machine body 21. The drive mechanism drives the hanging shaft 51 to swing back and forth along the oval hole 531 to achieve vibration screening of the cleaning screen 29. During the movement of the hanging shaft 51, the sealing and shielding component 54 always maintains an elastic and tight fit with the cover plate 53, achieving a good seal on the oval hole 531 and improving the problem of poor sealing and easy damage in traditional equipment.

[0158] Preferably, one end of the aforementioned hanging shaft 51 is fixed with a mounting flange 511, and one end of the aforementioned hanging shaft 51 extends into a matching shaft hole on the corresponding side of the aforementioned cleaning screen 29, and is connected and fixed to the corresponding side of the aforementioned cleaning screen 29 through the aforementioned mounting flange 511.

[0159] In this design, the lifting shaft 51 is connected and assembled with the cleaning screen 29 via the mounting flange 511, making the structure more robust. Specifically, the mounting flange 511 is assembled with the cleaning screen 29 via multiple bolts that pass through it.

[0160] In a preferred embodiment, the sealing and shielding assembly 54 includes an elastic element 541 and a pressure plate 542. The pressure plate 542 is vertically arranged in the front-back direction and is fitted onto the corresponding hanging shaft 51 and is in contact with the inner side of the corresponding cover plate 53. The elastic element 541 is connected between the pressure plate 542 and the corresponding side of the cleaning screen 29.

[0161] In this embodiment, the elastic element 541 is always in a compressed state, ensuring that the pressure plate 542 always remains in close contact with the inner side of the cover plate 53 under its elastic action. Furthermore, the two can slide normally relative to each other during the back-and-forth movement of the cleaning screen 29. The design is reasonable and the seal is tight.

[0162] Ideally, the elastic element 541 is a spring, which is sleeved on the hanging shaft 51, and its two ends are respectively connected to the corresponding sides of the pressure plate 542 and the cleaning screen 29.

[0163] In a preferred embodiment, the side of the pressure plate 542 that is in contact with the cover plate 53 is provided with a wear-resistant layer 543.

[0164] In this embodiment, the design of the wear-resistant layer 543 makes it more wear-resistant when in contact with and sliding relative to the cover plate 53, reducing the number of maintenance times.

[0165] Preferably, the wear-resistant layer 543 is a wear-resistant plate fixed to the corresponding surface of the pressure plate 542. Generally, the wear-resistant plate is made of plastic.

[0166] Specifically, the pressure plate 542 and the wear-resistant layer 543 are both provided with through holes that are compatible with the hanging shaft 51, and are fitted onto the hanging shaft 51 using the through holes.

[0167] In a preferred embodiment, the suspension assembly 52 includes a suspension rod 521 and a connecting seat 522. The suspension rod 521 is vertically arranged, and one end of it is connected to a bearing that rotatably engages with the suspension shaft 51. The upper end of the suspension rod 521 is rotatably connected to the connecting seat 522, and is assembled and connected to the upper part of the corresponding side of the machine body through the connecting seat 522.

[0168] In this embodiment, the upper end of the boom 521 is rotatably connected to the connecting seat 522 (movable connection), and its lower end is connected to the bearing on the boom 51. The relative rotation with the boom 51 is achieved by means of the bearing, thereby ensuring that the cleaning screen 29 can vibrate smoothly back and forth. The overall hoisting of the cleaning screen 29 is more stable and the structure is more robust.

[0169] In a preferred embodiment, the system further includes two slides 55, which are symmetrically mounted on the inner walls of both sides of the machine body. The rear end of each slide 55 extends to the rear impurity outlet of the machine body. Rolling elements 294 that roll in cooperation with the two slides 55 are provided on both sides of the bottom of the front end of the cleaning screen 29. The mounting height of the slides 55 is lower than the height of the rolling elements 294 after the cleaning screen 29 is installed in the machine body.

[0170] In this embodiment, the cooperation between the two slides 55 and the rolling element 294 greatly facilitates the quick and labor-saving installation of the cleaning screen 29 inside the machine body in the early stage. The specific installation process is as follows:

[0171] During the initial installation phase, the lifting shaft 51 is separate from the cleaning screen 29. The cleaning screen 29 is lifted by a hoisting mechanism and fed in through the impurity outlet at the rear of the machine. During feeding, the rolling elements 294 on both sides of the bottom front end of the cleaning screen 29 roll and are supported on two slide rails 55. Then, one worker can push the cleaning screen 29 into the machine along the slide rails 55. After the cleaning screen 29 reaches the designated position, the lifting shaft 51 and lifting rod 521 are installed on both sides of the cleaning screen 29. Then, the hoisting mechanism is operated to lift the cleaning screen 29. Make the rolling element 294 threshing slide 55, and connect the lifting rod 521 to the connecting seat 522 pre-installed on the upper part of both sides of the machine body. Finally, fix the cover plate 53 and ensure that the inner side of the cover plate 53 is in close contact with the sealing and shielding component 54. The entire structural design improves the situation where the traditional harvester screen box installation requires multiple people to push the screen box into the machine body and then lift it up to assemble the lifting rod. The assembly process is simpler, saves time and effort, and is more efficient. At the same time, it is also quicker and more convenient to remove and maintain it later.

[0172] The aforementioned slide 55 adopts a two-section splicing structure design. The front section of the slide is fixedly assembled on the inner wall of the machine body and slightly inclined downwards towards the front end. The rear end of the rear section of the slide extends to the waste outlet and is slightly inclined downwards towards the rear end as a whole, which facilitates the disassembly and assembly of the screen box.

[0173] Ideally, the aforementioned hanging shafts 51 are respectively installed at the front and rear ends of the left and right sides of the cleaning screen 29, and the aforementioned hanging shafts 51 on both sides are symmetrically distributed to ensure that the hanging force on both sides of the cleaning screen 29 is uniform, and the front and rear movement is more stable and smooth.

[0174] Example 10

[0175] Based on Example 3, such as Figure 1 , 23 As shown in Figures 24, 25, 26, and 27, the grain bin c includes two side boxes 61 distributed to the left and right. Each side box 61 can be independently rotated away from or towards the other side box 61. The opposite side walls of the two side boxes 61 are open, and the two side boxes 61 can be rotated to a closed state where the opposite side walls abut against each other and are connected. The upper part of one of the side boxes 61 is provided with a grain inlet 611 for connecting the grain auger 25 (the grain auger 25 and the grain inlet 611 are connected through a grain input device for grain transportation). The grain inlet 611 can be flipped relative to one side wall of the side box 61 in which it is located.

[0176] The positions of the two side boxes 61 around the axis when they rotate can be located on the front and rear sides of the grain box c, respectively, or simultaneously on the front and rear sides.

[0177] In one embodiment of the present invention, a fixing device is provided on the rear side of the two side boxes 61, and each side box 61 is rotatably connected to the fixing device.

[0178] In the above embodiments, preferably, the fixing device is a column 62, and each side box 61 is rotatably mounted on a column 62; a connecting rod 621 is fixed between the two columns 62, and the connecting rod 621 can fix the position between the two columns 62, so that the two side boxes 61 remain stable when they rotate around the column 62 respectively; and in the closed state, the connecting rod 621 can make the contact between the two side boxes 61 tighter.

[0179] In the above embodiments, preferably, the side box 61 and the column 62 are connected by a rotating connector, which includes, but is not limited to, a hinge, a torsion spring, and a rotating bearing; more preferably, the side box 61 and the column 62 are rotatably connected by a hinge.

[0180] Fastening connectors are provided on the opposing side walls between the two side boxes 61 of the present invention. In the closed state, the two side boxes 61 are tightly connected to each other through the fastening connectors.

[0181] The aforementioned fastening components include, but are not limited to, snap-fit ​​components, locking pins, and fasteners.

[0182] In one embodiment of the present invention, the fastening connector is a buckle 63; buckles 63 are provided on the upper edges of the opposite side walls between the two side boxes 61, and the two side boxes 61 are fixed to each other by the buckles 63; by providing buckles 63, the two side boxes 61 can be fixed to each other in the closed state.

[0183] Each side box 61 of the present invention is provided with a pull rod 65, and each pull rod 65 provides a pulling force to the corresponding side box 61 toward the other side box 61; so that when closed, the abutment between the two side boxes 61 is more stable and tight, further preventing the grains from leaking between the two side boxes 61.

[0184] like Figure 5 As shown, the pull rod 65 of the present invention can be connected in any way including but not limited to any structure that can maintain the two side boxes 61 in a closed and abutting state. Specifically, it includes the following two preferred embodiments: one end of the pull rod 65 is connected to the side box 61, and the other end is connected to the fixed frame 67.

[0185] A preferred embodiment is a detachable connection between the two pull rods 65.

[0186] In another preferred embodiment, the two pull rods 65 are detachably connected to other fixed mechanical structures connected to the rotating grain tank, and the fixed positions are located between the two side boxes 61 when the tank is closed.

[0187] In the present invention, at least one of the opposing side walls of the two side boxes 61 is provided with a sealing strip 613; in the closed state, the sealing strip 613 can further seal the contact between the two side boxes 61.

[0188] In one embodiment of the present invention, the upper part of one of the side boxes 61 is provided with a grain inlet 611 for material input. The grain inlet 611 can be flipped relative to one side wall of the side box 61. The grain inlet 611 is fixedly connected to a grain input device, and the grain input device extends into the grain inlet 611. Grains enter the grain inlet 611 through the grain input device. Since the grain box is in a closed state when grains are input, the upper parts of the two side boxes 61 are connected, and the grains input by the grain input mechanism can enter the two side boxes 61.

[0189] In the above embodiments, the edge where the feed inlet 611 abuts against the side box 61 can be sealed, but this seal does not affect the flipping of the side box 61, nor does it affect the rotation of the side box 61 itself.

[0190] In the above embodiments, preferably, the grain input device and the grain inlet 611 are sealed together by a sealing plate 615; the sealing plate 615 can prevent grain from leaking through any gaps that may exist at the connection between the grain cylinder 66 and the grain inlet 611.

[0191] In the above embodiments, preferably, the grain input device is a grain cylinder 66, the upper end of the grain cylinder 66 is a sprinkling port 661, and the lower end is fixedly connected to a conveying mechanism 662; the upper part of the grain cylinder 66 extends into any grain inlet 611, and the outer wall of the grain cylinder 66 is sealed and fixed to the grain inlet 611 by a sealing plate 615; the grains are conveyed into the grain cylinder 66 by the conveying mechanism 662 and sprinkled through the sprinkling port 661.

[0192] In the above embodiment, preferably, the position of the sprinkling port 661 corresponds to the position where the openings of the two side boxes 61 abut against each other, so that the grains sprinkled by the sprinkling port 661 can enter the two side boxes 61 at the same time.

[0193] In the above embodiment, preferably, there is a gap between the lower parts of the two side boxes 61, and the lower part of the grain cylinder 66 and the conveying mechanism 662 are located in the gap.

[0194] In the above embodiments, preferably, the grain inlet 611 extending from the upper part of the grain cylinder 66 can be flipped relative to any side wall of the side box 61 where it is located. Since the grain cylinder 66 extends into the grain inlet 611, the grain cylinder 66 can easily obstruct the rotation of the side box 61 when it is opened. By setting the grain inlet 611 on this side to a flip-out structure, it can be flipped outward relative to the side box 61 first, so that the grain cylinder 66 is detached from the side box 61, and then the side box 61 can be rotated, so that the opening of the rotating grain box can be carried out smoothly.

[0195] In the above embodiments, preferably, the grain cylinder 66 is arranged vertically, and the side box 61 on the same side as the grain cylinder 66 has a recessed structure on the side wall of the grain cylinder 66. The recessed structure corresponds to the grain cylinder 66, so that the grain cylinder 66 can be accommodated in the recessed structure, and the side wall of the side box 61 prevents the vertical extension structure of the grain cylinder 66 from being obstructed.

[0196] In the above embodiments, preferably, the top of the two feed inlets 611 is provided with a cover 6111; and a buckle is provided at the joint of the side walls of the two feed inlets 611 that are connected to each other.

[0197] Each side box 61 of the present invention is provided with a grain outlet 614; each grain outlet 614 is fixedly connected to the unloading mechanism; the grain outlet 614 is located on the front side of the side box 61, and the unloading mechanism corresponds to the position of the two grain outlets 614.

[0198] The aforementioned unloading mechanisms generally include various forms of unloading mechanisms. Depending on the specific structure of different unloading mechanisms, the specific way in which the grain outlet 614 is connected to it also varies.

[0199] In one embodiment of the present invention, the grain unloading mechanism includes a grain unloading auger 71, a grain storage box 72, and a plurality of transmission gears 73; the grain storage box 72 is located below two grain outlets 614, and its end sidewalls are respectively connected to the two grain outlets 614; the grain unloading auger 71 extends along the length of the grain storage box 72; the grains in the two side boxes 61 enter the grain storage box 72 through the grain outlets 614, and move to one side of the grain storage box 72 under the rotation of the grain unloading auger 71, where an outlet is provided to unload the grains. The system includes two grain outlets 614, each equipped with a tilting mechanism. Each tilting mechanism is rotatably fixed to the side wall of the outlet 614 via a shaft. A transmission gear 73 is mounted on the shaft of each tilting mechanism, located outside the outlet 614. A transmission chain is fitted onto the two transmission gears 73, transmitting power to enable the tilting mechanisms to rotate. As the grain passes through the outlet 614, the tilting mechanism stirs and disperses the grain, preventing blockage. A grain unloading shaking device is installed inside the side box 61. The shaking during unloading prevents grain accumulation inside the box, ensuring smooth unloading.

[0200] Preferably, the harvester in this embodiment is a tracked harvester. By setting a split saddle-shaped rotatable grain box, during the harvesting operation, only the weight of the whole machine increases when feeding and unloading grain, and the center of gravity does not change, thus breaking through the existing tracked harvester's inability to pass through rotten land and field ridges.

[0201] Meanwhile, the overall operating time of the tracked harvester is T, the operating time of the grain feeding process is T1, and the auxiliary operating time of the grain unloading process is T2. In the prior art, T1 = 60%T and T2 = 40%T. The harvester of the present invention, since the center of gravity does not change, allows for a larger grain tank volume. In one embodiment, the grain tank volume is 5 cubic meters. In this case, T2 = T * 40% / 3, and the operating time of the grain feeding process is increased to T1 = T - T2 = 86.7%. That is to say, the harvester with the split saddle-type rotatable grain tank unloads grain once, while the ordinary harvester needs to unload grain three times. Therefore, this harvester breaks through the efficiency limit of the existing tracked harvesters, generates significant social benefits, and is of great significance.

[0202] The disassembly process of the two side chambers 61 of the split saddle-type rotatable grain bin of the present invention during maintenance and repair is as follows:

[0203] Stop the harvester, shut down all working parts of the rotating grain hopper, and disassemble the unloading mechanism.

[0204] Remove the pull rod 65 to eliminate the tension on the two side boxes; open the cover 6111 on top of the grain inlet 611, open the buckle 63, and release the contact between the two side boxes 61.

[0205] Remove the sealing plate 615 and rotate the grain inlet 611 on that side outwards to detach the grain cylinder 66 from the side box 61 on that side; then rotate the side box 61 on that side outwards to open the rotating grain box and expose its interior, so that maintenance and repair can be carried out.

[0206] Depending on actual needs, the other side box 61 can also be rotated open to increase the opening space of the rotating grain box, making maintenance and repair more convenient.

[0207] After maintenance and repair, repeat the above steps in reverse order to close the rotating grain tank.

[0208] The detachable saddle-shaped rotatable grain bin of the present invention, by setting independently rotatable side boxes 61, makes the operation of the rotating grain bin more flexible during maintenance and repair. Either side box 61 can be opened according to the specific location requiring maintenance or repair, avoiding the problem of needing to disassemble the entire machine for maintenance in existing technologies. Simultaneously, the present invention is equipped with a buckle 63, a pull rod 65, and a connecting rod 621 to ensure a tight fit between the two side boxes 61. A sealing strip 613 is also provided at the fit point to further enhance the airtightness. While allowing the side boxes 61 to rotate flexibly, the invention also ensures a tight seal when closed, preventing grain from entering between the two side boxes 61 and causing mechanical failures.

[0209] Example 11

[0210] Based on the above embodiments 1-10, as follows Figure 1 , 8 As shown in Figures 28 and 29, the shredder 8 is slidably mounted on the mounting bracket 81 adapted to the rear end of the walking system, and can be fixed to the mounting bracket 81 by fasteners 82.

[0211] In this embodiment, the shredder 8 adopts a left-right sliding assembly method. When it is turned on, it is only necessary to release the fastener 82 and slide it to one side of the walking system. The opening process does not take up much space, especially not much space at the front end. At the same time, the overall sliding assembly structure is simpler and facilitates the disassembly, assembly and maintenance of the shredder 8.

[0212] Preferably, the rear end of the walking system is provided with a mounting bracket 81, and the aforementioned shredder 8 is mounted on the aforementioned mounting bracket 81.

[0213] In this design, the shredder 8 is installed using a dedicated mounting bracket 81, which results in a more accurate fit in assembly dimensions and a tighter structural fit.

[0214] In a preferred embodiment, the mounting bracket 81 is an L-shaped frame with one end vertical and the other end horizontal. The vertical end is fixed vertically to the rear end of the walking system. The horizontal end of the mounting bracket 81 is located on the upper rear side of its vertical end. The shredder 8 is assembled between the vertical end and the horizontal end of the mounting bracket 81.

[0215] In this embodiment, the mounting bracket 81 has a simple structural design and the chopper 8 has a more reasonable installation space layout.

[0216] In a preferred embodiment, the lower part of the horizontal end of the mounting bracket 81 is provided with a track 83 in the left-right direction, the top of the shredder 8 is fixed with a sliding member 84 that is slidably connected to the track 83, and the shredder 8 is fixed to the vertical end of the mounting bracket 81 by the fastener 82.

[0217] In this embodiment, the mounting bracket 81 is slidable in a suspended state. Its installation structure is relatively simple and reasonable, and it is convenient to move quickly. With the fastener 82 for fixation, the overall structure is also relatively stable.

[0218] Preferably, the rear end face of the shredder 8 is in contact with the vertical end of the mounting bracket 81.

[0219] In this design, the shredder 8 and the mounting bracket 81 are close to each other and tightly connected, so the shredder 8 can be well supported and the assembly structure is relatively stable.

[0220] Preferably, a mounting plate extends outward from the rear end edge of the shredder 8, and the mounting plate is fixed to the vertical end of the mounting bracket 81 by bolts passing through it, the bolts constituting the fastener 82.

[0221] In this design, an installation side plate is set at the rear edge of the shredder 8 (shell), and then bolts are used to fit and fix the installation side plate to the vertical end of the mounting bracket 81. This makes assembly simpler and faster, and disassembly and assembly more convenient.

[0222] More specifically, the track 83 is a grooved track with its groove opening facing backward, and the upper part of the slider 84 is provided with a hook-shaped part that extends into the groove of the track 83, and the hook-shaped part slides in cooperation with the track 83.

[0223] In this design, the groove structure of the track 83, combined with the hook-shaped part of the sliding part 84, allows the vertical support of the entire shredder 8 to be achieved by the engagement of the sliding part 84 with the inner cavity of the groove of the track 83 during assembly. At the same time, the engagement of the two also allows for lateral sliding between them, making the overall structural design quite reasonable.

[0224] Generally, the end of the hook-shaped part is provided with a smooth, upwardly curved protrusion. When the groove cavity of the other track 83 contacts, the smooth protrusion design can reduce the wear of the contact and sliding fit between the two.

[0225] In a preferred embodiment, a diagonal brace 811 is connected between the vertical end and the horizontal end of the mounting bracket 81, and the upper part of the rear end face of the shredder 8 is provided as an inclined surface that fits against the diagonal brace 811.

[0226] In this embodiment, the design of the diagonal brace 811 firstly strengthens the structural strength between the vertical and horizontal ends of the mounting bracket 81, that is, strengthens the overall structural strength of the mounting bracket 81. Secondly, the inclined surface design of the upper part of the rear end face of the chopper 8 allows its rear end face to fit tightly with the diagonal brace 811. At the same time, the lower plane of its rear end also fits tightly with the vertical end of the mounting bracket 81. This makes the rear end face of the chopper maintain a tight fit with the mounting bracket 81 as a whole, resulting in a more compact connection between the structures. The force distribution (force distribution between the chopper 8 and the mounting bracket 81) during assembly is more uniform, meaning that the assembly is more stable and firm.

[0227] Example 12

[0228] Harvesters are generally equipped with fuel tanks. Based on the above embodiments 1-10, such as... Figure 30 As shown, the oil tank design includes a main oil tank 91, which is located on one side of the rice harvester chassis and can be rotatably mounted on the upper part of either the left or right side of the chassis via a flip-mount assembly 92. It can also be flipped left or right under external force to the upper or outer part of the support on one side of the chassis.

[0229] In this embodiment, the main oil tank 91 is installed on one side of the chassis by flipping left and right. The overall installation structure is simple, occupies little space, is easy and stable to install, and is very conducive to later maintenance and daily upkeep.

[0230] Generally, the main fuel tank 91 is a cuboid shape with its long side extending along the front-to-back direction. In other words, the main fuel tank 91 is a large-capacity cuboid fuel tank with the upper part of one end connected to the fuel supply pipe that supplies fuel to the engine.

[0231] In a preferred embodiment, the aforementioned flip-mount assembly 92 includes a plurality of L-shaped support rods 921, which are spaced apart in the front-to-back direction and vertically arranged in the left-to-right direction. The outer side of the inflection point of each support rod 921 is rotatably connected to a longitudinal beam 93 at one edge of the chassis. The main oil tank 91 is attached to the inner side of the support rod 921 and is detachably connected to the support rod 921. Under the action of external force, the support rod 921 can be flipped left or right until one of the rods is attached to and supported on the upper side of the chassis or away from it.

[0232] In this embodiment, the inner L-shaped surface of the support rod 921 is in contact with the side and bottom surface of the main oil tank 91. When flipping, the main oil tank 91 can be flipped by rotating the support rod 921, which is relatively convenient.

[0233] It should be noted that a fastener 922 for fixing the main oil tank 91 is provided on the inner side of each of the above support rods 921.

[0234] The fastener 922 can be used to firmly fix the main oil tank 91 to the inner area of ​​the support rod 921, so that the main oil tank 91 will not shake or shift.

[0235] Specifically, a collar 924 corresponding to the support rod 921 is rotatably sleeved on the longitudinal beam 93, and the inflection point of the support rod 921 is connected and fixed to the corresponding collar 924.

[0236] Preferably, the fastener 922 is a clamp, which fits against the surface of the main oil tank 91 and is connected at both ends to the inner sides of the two rods of the support rod 921.

[0237] In this design, the fastener 922 uses an existing clamp, the shape of which is optimally designed to fit the upper surface and the other side of the main oil tank 91, ensuring that the main oil tank 91 can be securely installed in the inner area of ​​the multiple support rods 921.

[0238] Generally, fastener 922 uses an L-shaped clamp, which, together with an L-shaped support rod 921, makes the main oil tank 91 securely installed.

[0239] Ideally, one end of the support rod 921 is provided with a locking element 923 for locking with the chassis.

[0240] In this embodiment, the design of the locking member 923 ensures that when the support rod 921 is flipped to abut against the upper part of the chassis (that is, when the main oil tank 91 is in the normal assembly position), the locking member 923 locks the main oil tank 91 to the chassis, ensuring that the normal assembly and use position of the main oil tank 91 is fixed and relatively firm, and will not flip or move during use.

[0241] Ideally, the locking element 923 is a bolt. A bolt hole is provided at the end of the support rod 921 (that is, the end away from its inflection point), and a matching bolt hole is provided at the corresponding position on the beam of the chassis. After the main oil tank 91 is in the correct position, the locking element 923 (bolt) passes through the two bolt holes and is locked with a nut.

[0242] Example 13

[0243] Based on Example 12, such as Figure 31As shown, it also includes an auxiliary oil tank 94, which is installed on the rear side of the rice harvester chassis. The horizontal height of the bottom wall of the auxiliary oil tank is lower than that of the bottom wall of the main oil tank 91, and the two are connected to each other by an oil pipe 95. The top of the auxiliary oil tank 94 is connected to an oil supply pipe for supplying oil to the engine.

[0244] In this embodiment, the design significance of the auxiliary oil tank 94 is as follows: When the harvester is traveling on a slope, the upper part of the main oil tank 91 near the rear of the vehicle is connected to the oil supply line, and its front end is connected to the auxiliary oil tank 94 through the oil pipe 95. When traveling normally on a flat road, because the bottom wall of the auxiliary oil tank 94 is lower than the bottom wall of the main oil tank 91, according to the principle of communicating vessels, the oil levels inside the main oil tank 91 and the auxiliary oil tank 94 are equal. Moreover, the oil level inside the auxiliary oil tank 94 is higher than the oil level inside the main oil tank 91. Therefore, when the overall oil level is insufficient, due to the height difference between the two, even if the main oil tank 91 cannot draw in oil normally, the auxiliary oil tank 94 can still supply oil normally. This effectively improves the situation in the traditional single oil tank design of harvesters where the bottom oil cannot be effectively utilized and the actual oil load is much greater than the effective oil usage.

[0245] In addition, when going uphill, the front end of the main fuel tank 91 tilts upward, and the fuel inside is concentrated in its inner cavity and the auxiliary fuel tank 94, so that the fuel can be well drawn and supplied. When going downhill, the front end of the main fuel tank 91 tilts downward, and the fuel is concentrated in the front end of its inner cavity. Because the fuel supply pipe 95 (fuel pump) draws fuel from inside the front end of the main fuel tank 91, the design of the auxiliary fuel tank 94 can ensure that there is still a certain fuel level inside it for normal drawing and supply when going downhill due to the height difference. Therefore, the engine will not stall due to partial failure to draw fuel.

[0246] Ideally, the cross-sectional area of ​​the auxiliary fuel tank 94 is smaller than the cross-sectional area of ​​the main fuel tank 91.

[0247] Specifically, the main oil tank 91 generally adopts a long, large-capacity rectangular box, while the auxiliary oil tank 94 adopts a short, elongated box. This ensures that when the oil level inside the main oil tank 91 is low, the auxiliary oil tank 94 still has a considerable oil level inside due to the principle of communicating vessels, which allows for normal pumping.

[0248] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0249] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0250] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0251] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0252] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0253] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grain combine harvester, characterized in that: The system includes a header, a walking system, a transmission system, a threshing and cleaning system, and a grain bin. The threshing and cleaning system is fixedly mounted on the walking system. The header is mounted in front of the walking system and communicates with the threshing and cleaning system. The grain bin is fixedly mounted on the walking system, located in front of the threshing and cleaning system, and communicates with the threshing and cleaning system. The transmission system includes an engine, which is fixedly mounted at the rear end of the walking system. The engine is connected to the header and the threshing and cleaning system. The threshing and cleaning system includes a threshing machine body fixedly mounted on the walking system and a drum, a concave plate, a cleaning fan, a screen box, a grain auger, and a waste auger mounted on the threshing machine body. The cutting platform is connected to the front side of the drum. The outer side of the drum is fitted with a concave plate, and a straw discharge port is provided on its rear side. A shredder is provided at the straw discharge port. The screen box is located below the drum, and a cleaning screen is provided at its upper end. The cleaning fan is located at the bottom of the screen box. The front side of the bottom of the screen box is connected to the grain auger. The grain auger is connected to the grain bin. The rear side of the bottom of the screen box is connected to the waste auger. The grain bin includes two side chambers distributed to the left and right. Each side chamber can rotate independently in a direction away from or towards the other side chamber. The opposing side walls of the two side chambers are open, and the two side chambers can rotate to a closed state where the opposing side walls abut and communicate with each other. The upper part of one of the side chambers is provided with a grain inlet for the grain auger to communicate. The grain inlet can be flipped relative to one side wall of the side chamber it is located on. The grain inlet is fixedly connected to a grain input device, and the grain input device extends into the grain inlet, allowing grain to enter the grain inlet through the grain input device. Since the grain bin is in a closed state when grain is being input, the upper parts of the two side chambers are connected, and the grain input by the grain input mechanism can enter the two side chambers. Each side box has a grain outlet; each grain outlet is fixedly connected to the unloading mechanism; the grain outlets are located on the front side of the side box, and the unloading mechanism corresponds to the two grain outlets; the unloading mechanism includes an unloading auger, a grain storage box, and multiple transmission gears; the grain storage box is located below the two grain outlets, and its end sidewalls are connected to the two grain outlets respectively; the unloading auger extends along the length of the grain storage box; the grains in the two side boxes enter the grain storage box through the grain outlets and move to one side of the grain storage box under the rotation of the unloading auger, where an outlet is provided to discharge the grains; each grain outlet is equipped with a flipping mechanism, each flipping mechanism is rotatably fixed to the sidewall of the grain outlet via a shaft, and the shafts of the two flipping mechanisms are equipped with transmission gears located outside the grain outlets; a transmission chain is fitted on the two transmission gears, and the transmission chain can transmit power to enable the two flipping mechanisms to flip.

2. A grain combine harvester according to claim 1, characterized in that: The walking system includes a chassis frame with multiple front-to-back support rollers arranged on the lower part of the chassis frame. Tracks are fitted over the support rollers. The system also includes a track tensioning device, which comprises a support cylinder, a connecting cylinder, and a tensioning wheel. The tensioning wheel is mounted on one end of the connecting cylinder, and the other end of the connecting cylinder extends into the support cylinder and slides within it. The system further includes hydraulic cylinder support seats, a tensioning cylinder, and a tensioning locking structure. Two hydraulic cylinder support seats are provided, respectively fixedly connected to the support cylinder and the connecting cylinder. The two ends of the tensioning cylinder are detachably connected to the two hydraulic cylinder support seats. The tensioning locking structure is mounted on the support cylinder and used to lock the relative position of the support cylinder and the connecting cylinder. The threshing and cleaning system and the grain bin are both mounted on the chassis frame.

3. A grain combine harvester according to claim 1, characterized in that: It also includes a waste recycling and re-threshing mechanism, which includes a grain elevator and a re-threshing mechanism. The grain elevator is mounted on the outside of one side of the threshing machine body, and its lower feed inlet is connected and communicates with the discharge end of the waste auger. The re-threshing mechanism is mounted on the upper part of one side of the threshing machine body, and its feed inlet is connected and communicates with the upper discharge outlet of the grain elevator. The re-threshing mechanism has a grain outlet on the side near the threshing machine body. The grain outlet passes through an adapted opening on one side of the threshing machine body and extends to the top of one side of the cleaning screen.

4. A grain combine harvester according to claim 1, characterized in that: The cleaning fan includes a front fan and a rear fan. The front fan is located at the front of the screen box and below the front side of the cleaning screen. Its air outlet direction is inclined upward from front to back and penetrates the front middle area of ​​the cleaning screen. The rear fan is located at the rear of the screen box and below the rear section of the cleaning screen. Its air outlet direction is inclined upward from front to back and penetrates the rear area of ​​the cleaning screen.

5. A grain combine harvester according to claim 4, characterized in that: It also includes a secondary fan, which is located at the front of the screen box and between the rear and upper part of the front fan and the front part of the cleaning screen. Its air outlet direction is inclined upward from front to back and passes through the front part of the cleaning screen.

6. A grain combine harvester according to claim 4, characterized in that: It also includes an air guide plate, which includes an air guide base plate arranged horizontally at the front and back. The upper part of the middle area of ​​the air guide base plate is provided with a protruding triangular pyramid-shaped air guide part. The front end of the air guide part is a cone point, the rear end is a cone bottom end, and the left and right sides are two left and right symmetrical cone surfaces, and the two cone surfaces respectively form air guide surfaces.

7. A grain combine harvester according to claim 4, characterized in that: The front fan includes a housing, a rotating shaft, multiple sets of crossflow blades, and multiple crossflow blades. The housing has an air inlet at either end (left or right) and an air outlet extending laterally towards both ends on its front side. A detachable baffle is installed at each air inlet. The rotating shaft is rotatably mounted within the housing in the left-right direction, with one end extending beyond the corresponding end of the housing. A radial air inlet is located on the upper part of the housing, and a detachable cover plate is provided at this radial air inlet. Multiple sets of crossflow blades are axially spaced on the rotating shaft. Multiple crossflow blades are detachably mounted around the periphery of the multiple sets of crossflow blades and are circumferentially spaced along the rotating shaft, with each crossflow blade extending axially along the rotating shaft.

8. A grain combine harvester according to claim 1, characterized in that: The cleaning screen is detachably equipped with a hanging shaft perpendicular to its left and right sides. The hanging shaft passes through the fitting mounting holes on both sides of the threshing machine body, and one end of the hanging shaft passing through the mounting hole is connected to a suspension component that is movably connected to the upper part of the corresponding side of the threshing machine body. A cover plate is detachably installed at the mounting hole. The cover plate has an oblong hole that passes through it along the front-back direction. The hanging shaft passes through the corresponding oblong hole. A sealing and shielding component that can elastically move along its axial direction is fitted on the hanging shaft. The sealing and shielding component fits against the inner side of the corresponding cover plate.

9. A grain combine harvester according to any one of claims 1 to 8, characterized in that: The shredder can be slidably mounted on the frame adapted to the rear end of the walking system and can be fixed to the frame with fasteners.

10. A grain combine harvester according to any one of claims 1 to 8, characterized in that: The grain combine harvester has an oil tank, which includes a main oil tank. The main oil tank is located on either the left or right side of the walking system and is rotatably mounted on the upper part of either the left or right side of the walking system via a flip-mount assembly. It can also be flipped to the upper or outer side of the walking system supported by an external force.

11. A grain combine harvester according to claim 10, characterized in that: It also includes an auxiliary oil tank, which is installed on the rear side of the rice harvester chassis. The bottom wall of the auxiliary oil tank is at a lower level than the bottom wall of the main oil tank, and the two are connected to each other by an oil pipe at their bottoms.

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