Ratoon rice threshing device and combine harvester

Abstract

The invention discloses a ratooning rice threshing device and a combine harvester, and relates to the technical field of agricultural machinery, and the ratooning rice threshing device comprises a pre-threshing section and a threshing section which are connected with each other; the pre-threshing section comprises a pre-threshing roller, wherein flexible soft teeth are fixedly arranged on the peripheral face of the pre-threshing roller, and the flexible soft teeth are arranged in a radial mode in the radial direction of the pre-threshing roller. The flexible soft teeth comprise straight teeth and bent teeth, and bent parts are arranged at the ends, away from the pre-threshing roller, of the bent teeth and intersect with the straight teeth; first threshing gaps are formed between the straight teeth and the bent teeth, and the first threshing gaps are smaller than the average diameter of a threshed product. According to the invention, the pre-threshing section with the flexible soft teeth is arranged in front of the threshing section, so that grains which are easy to fall off are threshed, pre-threshing is carried out, and the threshing effect is improved. The flexible soft teeth are arranged to be in a straight tooth form and a bent tooth form, in the threshing rotation process, the straight teeth and the bent teeth which intersect with each other can generate a rubbing action better, and more grains can be threshed as much as possible on the premise that the integrity of the grains is effectively protected.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, in particular to a threshing device and a combine harvester. Background Art

[0002] Ratoon rice, a rice crop that can be planted once and harvested twice, offers advantages such as labor savings, seed savings, and land conservation, and holds great promise for widespread adoption in my country. While manual harvesting can better preserve the integrity of the rice stubble, the labor intensity and efficiency of harvesting, transporting, and threshing are high. Furthermore, with the shift of rural labor and rising labor costs, farmers cultivating ratoon rice are increasingly demanding ratoon rice harvesters.

[0003] Raped rice is harvested twice a year, with the first crop of rice accounting for more than half of the total annual yield of replanted rice. The threshing device is an important working part of the replanted rice harvester. The water content of the rice ears during the mechanized harvest of the first crop of replanted rice is higher than that during the single-season maturity. The existing replanted rice threshing device is difficult to solve the threshing problem, which directly reduces the amount of rice that can be collected in the end, reduces the yield of the first crop of rice, and thus affects the economic benefits of farmers. In addition, the unthreshed rice flows into the subsequent straw processing procedures along with the straw, which may increase the difficulty and cost of the subsequent processing procedures, and may force the processing equipment to operate in a non-ideal state, which may accelerate the wear and damage of the equipment in the long run. Therefore, there is an urgent need for a threshing device that can thresh cleanly. Summary of the Invention

[0004] The purpose of the present invention is to provide a regenerated rice threshing device and a combine harvester to solve the problems existing in the above-mentioned prior art. A pre-threshing section with flexible soft teeth is set before the threshing section, and threshing is divided into two sections, thereby solving the need for threshing the first crop of regenerated rice.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A regenerated rice threshing device comprises a pre-threshing section and a threshing section which are arranged in sequence; the pre-threshing section comprises a pre-threshing drum, the outer peripheral surface of which is fixedly provided with flexible soft teeth, and the flexible soft teeth are radially arranged along the radial direction of the pre-threshing drum; the flexible soft teeth comprise straight teeth and curved teeth, the curved teeth having a curved portion at one end away from the pre-threshing drum, the curved portion intersecting with the straight teeth; a first threshing gap is provided between the straight teeth and the curved teeth, and the first threshing gap is smaller than the average diameter of the threshed product.

[0007] In an exemplary embodiment, every two of the curved teeth and one of the straight teeth form a flexible tooth group, the straight tooth is located between the two curved teeth, and the curved portions of the two curved teeth are both oriented toward the straight teeth and intersect with the straight teeth.

[0008] In an exemplary embodiment, the threshing section includes a threshing drum connected to the pre-threshing section drum, and threshing teeth are fixedly provided on the circumference of the pre-threshing drum.

[0009] In an exemplary embodiment, a first concave sieve plate is provided below the pre-threshing section, a first sieve hole is provided on the first concave sieve plate, an inner diameter of the first sieve hole is larger than the maximum diameter of the threshed product grains and smaller than the minimum diameter of the stems; a second concave sieve plate is provided below the threshing section, a second threshing gap is provided between the second concave sieve plate and the threshing section, a second sieve hole is provided on the second concave sieve plate, an inner diameter of the second sieve hole is N times the maximum diameter of the threshed product grains, and N is an integer greater than 1.

[0010] In an exemplary embodiment, it also includes an adjusting device for adjusting the size of the second threshing gap, the adjusting device includes a first rotary drive mechanism, a transmission rod, a transmission gear, a transmission rack and a top rod, the transmission rod is transmission-connected to the output end of the first rotary drive mechanism, transmission gears are provided at both ends of the transmission rod, the gears are meshed with the transmission rack, the top end of the transmission rack is fixedly connected to the bottom end of the top rod, and the top end of the top rod is fixedly connected to the second concave screen plate.

[0011] In an exemplary embodiment, an anti-clogging toothbrush is provided along the inner contour of the first concave sieve plate, and a telescopic mechanism is provided on both upper edges of the first concave sieve plate or the second concave sieve plate, and the movable end of the telescopic mechanism is fixedly connected to the anti-clogging toothbrush;

[0012] A guide strip is provided on one side of the first concave sieve plate close to the anti-clogging toothbrush, and a guide groove matched with the guide strip is provided on one side of the anti-clogging toothbrush close to the first concave sieve plate.

[0013] In an exemplary embodiment, a feeding structure is fixedly provided at one end of the pre-threshing drum away from the threshing drum, and the feeding structure includes a feeding cone and feeding blades spirally provided on the outer surface of the feeding cone.

[0014] In an exemplary embodiment, it also includes a threshing box and a grain storage box arranged above and below; the pre-threshing section and the threshing section are arranged inside the threshing box and are rotatably connected to the threshing box; a second rotary drive mechanism is provided outside the threshing box, and the output end of the second rotary drive mechanism is transmission-connected to the pre-threshing section; a stirring device is provided inside the grain storage box, and a third rotary drive mechanism is provided outside the grain storage box, and the output end of the third rotary drive mechanism is transmission-connected to the stirring device.

[0015] In an exemplary embodiment, a humidity sensing element is provided on the feeding side of the pre-threshing section, and the humidity sensing element is signal-connected to the second rotary drive mechanism.

[0016] The present invention also provides a combine harvester comprising the threshing device.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] By setting a pre-threshing section with flexible soft teeth in front of the threshing section, easily detached kernels are removed, thereby pre-threshing and improving the threshing effect. By setting the flexible soft teeth in two forms, straight and curved, not only does it have the advantages of traditional flexible soft teeth in reducing direct impact and pressure on the kernels, thereby reducing the kernel breakage rate, but also during the threshing rotation process, the intersecting straight and curved teeth in the flexible soft teeth can better produce a kneading action, effectively protecting the integrity of the kernels and removing as many kernels as possible.

[0019] Other technical solutions disclosed in the present invention also have the following technical advantages:

[0020] 1. By setting an adjustment device, the first rotary drive mechanism is used to drive the transmission rod to rotate, the transmission rod drives the transmission gear, the transmission gear drives the transmission rack, the transmission rack drives the push rod, and the push rod drives the second concave screen plate to move upward or downward, thereby changing the size of the second threshing gap between the threshing section and the second concave screen plate to adapt to specific working conditions and achieve better threshing effect.

[0021] 2. An anti-clogging tooth brush is arranged on the inner contour of the first concave sieve plate, and a telescopic mechanism is used to drive the anti-clogging tooth brush to move back and forth. The brush teeth on the anti-clogging tooth brush are used to scrape out the stems blocked in the smaller first sieve holes to prevent the stems from blocking the first concave sieve plate and affecting the threshing effect.

[0022] 3. By arranging a guide strip on the first concave sieve plate and a guide groove on the anti-clogging toothbrush, the guide strip and the guide groove cooperate with each other, which can effectively improve the stability of the back-and-forth reciprocating motion of the anti-clogging toothbrush.

[0023] 4. By arranging a stirring device in the grain storage box and making the stirring device rotate under the drive of the third rotary drive mechanism, the grains stored in the grain storage box can be stirred so that they are evenly distributed in the grain storage box, preventing the grains from accumulating in one place and affecting the effect of the first concave sieve plate and / or the second concave sieve plate.

[0024] 5. By setting a humidity sensing element on the feeding side of the pre-threshing section and connecting the humidity sensing element to the signal of the second rotary drive mechanism that drives the pre-threshing section and the threshing section, the speed of the second rotary drive mechanism can be changed according to the humidity of the feeding product. When the humidity is high, the speed is reduced to avoid damaging the grains. When the humidity is low, the speed is increased to improve the threshing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a threshing device disclosed in a specific embodiment of the present invention;

[0027] Figure 2 for Figure 1 sectional view of

[0028] Figure 3 for Figure 2 Schematic diagram of the structure of the middle feeding structure, pre-threshing section and threshing section;

[0029] Figure 4 for Figure 3 Schematic diagram of the structure of the flexible soft teeth in the middle pre-threshing section;

[0030] Figure 5 for Figure 2 A schematic structural diagram of the first and second concave sieve plates;

[0031] Figure 6 for Figure 5 Schematic diagram of the structure of the anti-clogging brush teeth;

[0032] Figure 7 for Figure 5 Enlarged view of part A in the middle;

[0033] Figure 8 for Figure 2 Schematic diagram of the structure of the middle regulating device;

[0034] Figure 9 for Figure 1 The structural diagram of the middle threshing box;

[0035] Figure 10 for Figure 2 Schematic diagram of the structure of the intermediate particle storage box and the stirring device;

[0036] Among them, 1. threshing box; 2. grain storage box; 3. feeding port; 4. second rotary drive mechanism; 5. feeding structure; 6. pre-threshing section; 7. threshing section; 8. guide bar; 9. discharge port; 10. second concave sieve plate; 11. adjustment device; 12. stirring device; 13. third rotary drive mechanism; 14. first concave sieve plate; 15. feeding blade; 16. feeding cone; 17. central axis; 18. reinforcing ribs; 19. threshing teeth; 20. Reaming teeth; 21. Pre-threshing drum; 22. Curved teeth; 23. Straight teeth; 24. Anti-clogging tooth brush; 25. Telescopic mechanism; 26. Second sieve hole; 27. Brush teeth; 28. Guide groove; 29. ​​Guide bar; 30. First sieve hole; 31. Transmission rod; 32. Transmission gear; 33. Transmission rack; 34. Push rod; 35. Humidity sensing element; 36. Stirring shaft; 37. Stirring blades; 38. Transmission protection housing; 39. Tooth rod. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. People familiar with this technology can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification for the understanding and reading of those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no technical significance. Any structural modification, change in proportional relationship, or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] It should also be noted that in the embodiments of the present application, the same figure mark represents the same component or the same part.

[0040] The purpose of the present invention is to provide a threshing device and a combine harvester to solve the problems existing in the prior art, so that a pre-threshing section with flexible soft teeth is set before the threshing section, and threshing is divided into two sections, so that threshing is cleaner and more thorough.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] Please refer to Figures 1 to 10 The present embodiment provides a regenerated rice threshing device, comprising a pre-threshing section 6 and a threshing section 7 connected to each other; the pre-threshing section 6 comprises a pre-threshing drum 21, and flexible soft teeth are fixedly provided on the outer peripheral surface of the pre-threshing drum 21, and the flexible soft teeth are radially arranged along the radial direction of the pre-threshing drum 21; the flexible soft teeth comprise straight teeth 23 and curved teeth 22, and the curved teeth 22 have a curved portion at one end away from the pre-threshing drum 21, and the curved portion intersects with the straight teeth 23; a first threshing gap is provided between the straight teeth 23 and the curved teeth 22, and the first threshing gap is smaller than the average diameter of the threshed product.

[0044] By providing a pre-threshing section 6 with flexible soft teeth in front of the threshing section 7, easily fallen grains are removed, thereby performing pre-threshing, which can effectively improve the threshing effect. By providing the flexible soft teeth in two forms, straight teeth 23 and curved teeth 22, not only does it have the advantages of traditional flexible soft teeth in reducing direct impact and pressure on the grains, thereby reducing the grain breakage rate, but also during the threshing rotation process, the intersecting straight teeth 23 and curved teeth 22 in the flexible soft teeth can better produce a kneading action, thereby removing as many grains as possible while effectively protecting the integrity of the grains.

[0045] Specifically, the straight teeth 23 and the curved teeth 22 in the flexible soft teeth can be combined with each other to form a variety of different forms, such as the simplest straight tooth 23 and a curved tooth 22 arranged at intervals from each other, or a flexible tooth group consisting of two curved teeth 22 and a straight tooth 23, the straight tooth 23 is located between the two curved teeth 22, and the curved portions of the two curved teeth 22 are both facing the straight teeth 23 and intersecting with the straight teeth 23. Such an arrangement can increase the contact area between the curved portion and the threshed product, and the curved portion can provide more resistance, so that more grains can be removed. Multiple groups of flexible teeth are evenly arranged on the outer peripheral surface of the threshing drum.

[0046] The threshing section 7 includes a threshing drum connected to the drum of the pre-threshing section 6, and threshing teeth 19 are fixedly provided on the threshing drum in the circumference. The threshing drum can be a circumferentially closed cylindrical structure, or it can be a fence-shaped drum formed by surrounding a plurality of tooth rods 39 provided with threshing teeth 19. In this embodiment, the latter form is adopted, specifically including a central axis 17, a plurality of tooth rods 39 are evenly arranged around the central axis 17, and a plurality of reinforcing ribs 18 are provided along the axial direction of the central axis 17. The reinforcing ribs 18 are fixedly connected to the surrounding tooth rods 39. Each tooth rod 39 is provided with a plurality of threshing teeth 19, and the threshing teeth 19 on two adjacent tooth rods 39 are staggered.

[0047] A first concave sieve plate 14 is provided below the pre-threshing section 6, and a first sieve hole 30 is provided on the first concave sieve plate 14. The inner diameter of the first sieve hole 30 is larger than the maximum diameter of the threshed product grains and smaller than the minimum diameter of the stems so as to allow the threshed product grains to pass through and prevent the stems from passing through; a second concave sieve plate 10 is provided below the threshing section 7, and a second threshing gap is provided between the second concave sieve plate 10 and the end of the threshing teeth 19 of the threshing section 7. A second sieve hole 26 is provided on the second concave sieve plate 10, and the inner diameter of the second sieve hole 26 is N times the maximum diameter of the threshed product grains, where N is an integer greater than 1, so as to allow multiple threshed product grains to pass through.

[0048] The first concave sieve plate 14 and the second concave sieve plate 10 are fixedly connected end to end. When the threshed product passes through the pre-threshing section 6, a small number of easy-to-fall-off grains are removed in advance and fall through the first sieve holes 30 with smaller apertures on the first concave sieve plate 14. Broken stems that are larger than the grains are intercepted on the first concave sieve plate 14 and separated from the grains.

[0049] As a preferred solution of this embodiment, an anti-clogging tooth brush 24 is provided along the inner contour of the first concave sieve plate 14, and a telescopic mechanism 25 is provided on the upper edges of both sides of the first concave sieve plate 14 or the second concave sieve plate 10, and the movable end of the telescopic mechanism 25 is fixedly connected to the anti-clogging tooth brush 24. The telescopic mechanism 25 can adopt a conventional hydraulic telescopic rod, an electric telescopic rod or other structures, or can realize reciprocating motion through the structure of a guide rail slider, or any other structure in the prior art that can realize the above functions. By providing an anti-clogging tooth brush 24 in a fit to the inner contour of the first concave sieve plate 14, the telescopic mechanism 25 is used to drive the anti-clogging tooth brush 24 to reciprocate back and forth, and the brush teeth 27 on the anti-clogging tooth brush 24 are used to scrape out the stems blocked in the smaller first sieve hole 30, thereby preventing the stems from clogging the first concave sieve plate 14 and affecting the threshing effect.

[0050] Furthermore, a guide bar 29 is provided on one side of the first concave sieve plate 14 near the anti-clogging toothbrush 24, and a guide groove 28 is provided on the other side of the anti-clogging toothbrush 24 near the first concave sieve plate 14 to cooperate with the guide bar 29. By providing the guide bar 29 on the first concave sieve plate 14 and the guide groove 28 on the anti-clogging toothbrush 24, the guide bar 29 and the guide groove 28 cooperate with each other, which can effectively improve the stability of the back-and-forth reciprocating motion of the anti-clogging toothbrush 24.

[0051] The threshed product enters the threshing section 7 after passing through the pre-threshing section 6. The stems with grains collide and rub against the second concave sieve plate 10 driven by the high-speed rotating threshing teeth 19, and most of the grains are removed and fall through the second sieve holes 26. The aperture of the second sieve holes 26 is an integer multiple of the maximum diameter of the grains of the threshed product, which allows more grains to fall at the same time and avoids accumulation on the second concave sieve plate 10. The stems are entangled in the threshing teeth 19 and generally do not fall. Then they are discharged under the action of the guide strips 8 arranged above the inside of the threshing box 1 surrounding the pre-threshing section 6 and the threshing section 7.

[0052] Furthermore, the end of the gear rod 39 away from the pre-threshing section 6 is provided with a hinged cutting tooth 20, the length of the hinged cutting tooth 20 is greater than the length of the threshing tooth 19, and the second concave screen plate 10 avoids the setting position of the hinged cutting tooth 20. The end of the gear rod 39 away from the pre-threshing section 6 is provided with a discharge port 9 of the threshing device, and the hinged cutting tooth 20 is used to chop the longer stems before the stems are discharged.

[0053] As a preferred solution of this embodiment, it also includes an adjusting device 11 for adjusting the size of the second threshing gap, the adjusting device 11 includes a first rotary drive mechanism, a transmission rod 31, a transmission gear 32, a transmission rack 33 and a push rod 34, the transmission rod 31 is transmission-connected to the output end of the first rotary drive mechanism, both ends of the transmission rod 31 are provided with transmission gears 32, the transmission gear 32 is meshed with the transmission rack 33, the top end of the transmission rack 33 is fixedly connected to the bottom end of the push rod 34, and the top end of the push rod 34 is fixedly connected to the second concave sieve plate 10. A set of adjusting devices 11 is provided at the front and rear ends of the second concave sieve plate 10, and the four vertices of the two sets of adjusting devices 11 are respectively fixedly connected to the four corners of the second concave sieve plate 10. When the first concave sieve plate 14 and the second concave sieve plate 10 are fixedly connected head to tail, the four vertices of the two sets of adjusting devices 11 are respectively fixedly connected to the two corners on the front side of the first concave sieve plate 14 and the two corners on the back side of the second concave sieve plate 10.

[0054] By setting the adjustment device 11, the first rotary drive mechanism is used to drive the transmission rod 31 to rotate, the transmission rod 31 drives the transmission gear 32, the transmission gear 32 drives the transmission rack 33, the transmission rack 33 drives the push rod 34, and the push rod 34 drives the second concave sieve plate 10 to move upward or downward, thereby changing the size of the second threshing gap between the end of the threshing teeth 19 of the threshing section 7 and the second concave sieve plate 10 to adapt to the amount of threshed product input. The more the input, the larger the second threshing gap, and the smaller the input, the smaller the second threshing gap, so as to achieve a more suitable threshing effect.

[0055] In this embodiment, it also includes a threshing box body 1 and a grain storage box body 2 arranged upper and lower, the pre-threshing section 6 and the threshing section 7 are arranged inside the threshing box body 1 and are rotatably connected to the threshing box body 1, and a second rotary drive mechanism 4 is provided outside the threshing box body 1, and the output end of the second rotary drive mechanism 4 is transmission-connected to the pre-threshing section 6.

[0056] Furthermore, a feed structure 5 is provided at one end of the pre-threshing drum 21 away from the threshing drum, and the feed structure 5 includes a feed cone 16 and feed blades 15 spirally arranged on the outer surface of the feed cone 16. The output end of the second rotary drive mechanism 4 is fixedly connected to the feed cone 16, and the feed cone 16 is fixedly connected to the pre-threshing drum 21, which drives the feed cone 16 to rotate and then drives the pre-threshing drum 21 to rotate. A feed port 3 is provided at the position of the threshing box 1 corresponding to the feed structure 5. The threshed product is put into the threshing device from the feed port 3 and is brought into the pre-threshing section 6 by the rotating feed cone 16 and the spirally arranged feed blades 15. The spirally arranged feed blades 15 can ensure the fluidity of the threshed product.

[0057] A guide strip 8 for discharging straw is installed above the interior of the threshing box 1. The guide strip 8 is arranged in the form of a semi-spiral within the threshing box 1. The so-called semi-spiral refers to a full spiral set on the inner wall of a complete cylinder or polygonal hollow column. The full spiral is cut in half along a plane passing through the centerline of the cylinder or hollow column, and the remaining half is the semi-spiral. The semi-spiral guide strip 8 facilitates better threshing and sorting, while ensuring the flow of straw within the threshing box 1, and feeding the straw into the discharge port 9 at the end of the threshing section 7.

[0058] The grain storage box 2 is arranged below the threshing box 1. The grains removed by the pre-threshing section 6 or the threshing section 7 pass through the first sieve hole 30 or the second sieve hole 26 and fall into the grain storage box 2. A stirring device 12 is arranged in the grain storage box 2. The stirring device 12 includes a stirring shaft 36 and a stirring blade 37. The stirring blade 37 is a spiral blade spirally arranged on the periphery of the stirring shaft 36. A third rotary drive mechanism 13 is arranged outside the grain storage box 2. The output end of the third rotary drive mechanism 13 is connected to the stirring device 12 in a transmission manner. By arranging the stirring device 12 in the grain storage box 2 and rotating the stirring device 12 under the drive of the third rotary drive mechanism 13, the grains stored in the grain storage box 2 can be stirred so that they are evenly distributed in the grain storage box 2, thereby preventing the fallen grains from piling up in one place and affecting the effect of the first concave sieve plate 14 and / or the second concave sieve plate 10. By controlling the forward and reverse rotation of the third rotary drive mechanism 13, the grains in the grain storage box 2 can be moved to the left or right. When too many grains are accumulated on one side, the grains can be pushed to the other side, or repeatedly moved in both directions to ensure the uniform distribution of grains in the grain storage box 2.

[0059] As a preferred solution of this embodiment, a humidity sensing element 35 is provided on the feeding side of the pre-threshing section 6, which is the feeding port 3 of the threshing box in this embodiment. The humidity sensing element 35 is connected to the second rotary drive mechanism 4 by signal. By providing the humidity sensing element 35 on the feeding side of the pre-threshing section 6 and connecting the humidity sensing element 35 to the second rotary drive mechanism 4 for driving the pre-threshing section 6 and the threshing section 7 to rotate by signal, the rotation speed of the second rotary drive mechanism 4 can be changed according to the humidity of the feeding product. When the humidity is high, the rotation speed is reduced to avoid damaging the grains. When the humidity is low, the rotation speed is increased to improve the threshing efficiency.

[0060] A transmission protection housing 38 is provided in the storage box, and the adjustment device 11 for adjusting the second threshing gap is provided in the transmission protection housing 38 to prevent the grains in the storage box from affecting the adjustment device 11. The first rotary drive mechanism in the adjustment device 11 can be provided inside the storage box or outside the storage box, and the transmission rod 31 is rotatably provided on the side wall of the storage box.

[0061] Furthermore, this embodiment includes a controller, to which the humidity sensing element 35, the first rotary drive mechanism, the second rotary drive mechanism 4, and the third rotary drive mechanism 13 are all signal-connected. The humidity sensing element 35 can be a humidity sensor, a temperature and humidity sensor, or any other element capable of detecting humidity. The first rotary drive mechanism, the second rotary drive mechanism 4, and the third rotary drive mechanism 13 can be motors.

[0062] The working process of this embodiment is:

[0063] Taking regenerated rice as an example of the threshed product, this embodiment is installed on a regenerated rice combine harvester. Before the harvesting operation, the feeding amount of the regenerated rice can be judged based on experience, and the second rotary drive mechanism 4 is controlled to rotate according to the feeding amount through the controller. Then, the second concave sieve plate 10, or the first concave sieve plate 14 and the second concave sieve plate 10 are controlled by the adjusting device 11 to move in the vertical direction to change the second threshing gap and achieve a better threshing effect.

[0064] When the harvester is walking in the field and harvesting, the regenerated rice enters the device through the feed port 3. The humidity sensing element 35 at the feed port 3 detects the humidity of the regenerated rice and transmits a signal to the controller. The controller controls the second rotary drive mechanism 4 to change the rotation speed of the pre-threshing section 6 and the threshing section 7 according to the humidity data to achieve a better threshing effect.

[0065] The regenerated rice is fed into the pre-threshing section 6 through the feeding structure 5. The regenerated rice is rubbed by the swinging flexible soft teeth to remove the rice grains that are easy to fall off, and pre-threshing is carried out. The removed rice grains fall into the grain storage box 2 through the first concave sieve plate 14. The first sieve holes 30 on the first concave sieve plate 14 are very small, which can prevent the stems from falling into the grain storage box 2. During the threshing process, to prevent the stems from blocking the first concave sieve plate 14, the telescopic mechanism 25 will drive the anti-blocking tooth brush 24 to move back and forth along the guide bar 29 through the guide groove 28. The brush teeth 27 on the anti-blocking tooth brush 24 will scrape out the stems blocked in the first sieve holes 30 and bring them to the threshing section 7. The threshing teeth 19 will roll the stems out for threshing. The removed rice grains fall into the grain storage box 2 through the second concave sieve plate 10. The threshed stems are discharged from the discharge port 9 at the rear of the threshing box 1. During the threshing process, the third rotary drive mechanism 13 rotates, driving the stirring device 12 to rotate. The stirring device 12 can evenly distribute the rice grains in the rice grain box to prevent the rice grains from accumulating in one place and clogging the concave sieve plate to affect the threshing effect.

[0066] Of course, in addition to regenerated rice, this embodiment can also be applied to other crop products, such as ear-shaped crops such as rice, wheat, and millet.

[0067] Example 2

[0068] This embodiment provides a combine harvester, comprising the regenerated rice threshing device described in the first embodiment.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integrated connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application in specific contexts.

[0070] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0071] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the present invention to express positional relationships or shapes include states or shapes that are approximate, similar, or close thereto.

[0072] Any component provided by the present invention may be assembled from multiple separate components, or may be a separate component manufactured by an integral molding process.

[0073] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0074] It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0075] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A regenerated rice threshing device, characterized in that: It comprises a pre-threshing section and a threshing section which are arranged in sequence; the pre-threshing section comprises a pre-threshing drum, the outer peripheral surface of which is fixedly provided with flexible soft teeth, which are arranged radially along the radial direction of the pre-threshing drum; the flexible soft teeth comprise straight teeth and curved teeth, the curved teeth have a curved portion at one end away from the pre-threshing drum, and the curved portion intersects with the straight teeth; a first threshing gap is provided between the straight teeth and the curved teeth, and the first threshing gap is smaller than the average diameter of the threshed product.

2. The regenerated rice threshing device according to claim 1, characterized in that: Every two of the curved teeth and one of the straight teeth form a flexible tooth group, the straight tooth is located between the two curved teeth, and the curved portions of the two curved teeth are both oriented toward the straight teeth and intersect with the straight teeth.

3. The regenerated rice threshing device according to claim 1, characterized in that: The threshing section comprises a threshing drum connected to the pre-threshing section drum, and threshing teeth are fixedly arranged on the circumference of the pre-threshing drum.

4. The regenerated rice threshing device according to claim 1, characterized in that: A first concave sieve plate is arranged below the pre-threshing section, and a first sieve hole is formed on the first concave sieve plate, and an inner diameter of the first sieve hole is larger than the maximum diameter of the threshed product grains and smaller than the minimum diameter of the stems; a second concave sieve plate is arranged below the threshing section, and a second threshing gap is provided between the second concave sieve plate and the threshing section, and a second sieve hole is formed on the second concave sieve plate, and an inner diameter of the second sieve hole is N times the maximum diameter of the threshed product grains, where N is an integer greater than 1.

5. The regenerated rice threshing device according to claim 4, characterized in that: It also includes an adjusting device for adjusting the size of the second threshing gap, the adjusting device includes a first rotary drive mechanism, a transmission rod, a transmission gear, a transmission rack and a push rod, the transmission rod is transmission-connected to the output end of the first rotary drive mechanism, transmission gears are provided at both ends of the transmission rod, the gears are meshed with the transmission rack, the top end of the transmission rack is fixedly connected to the bottom end of the push rod, and the top end of the push rod is fixedly connected to the second concave screen plate.

6. The regenerated rice threshing device according to claim 4, characterized in that: An anti-clogging toothbrush is provided along the inner contour of the first concave sieve plate, and a telescopic mechanism is provided on both upper edges of the first concave sieve plate or the second concave sieve plate, and a movable end of the telescopic mechanism is fixedly connected to the anti-clogging toothbrush; A guide strip is arranged on one side of the first concave sieve plate close to the anti-clogging toothbrush, and a guide groove matched with the guide strip is arranged on one side of the anti-clogging toothbrush close to the first concave sieve plate.

7. The regenerated rice threshing device according to claim 1, characterized in that: A feeding structure is fixedly arranged at one end of the pre-threshing drum away from the threshing drum. The feeding structure comprises a feeding cone and feeding blades spirally arranged on the outer surface of the feeding cone.

8. The regenerated rice threshing device according to any one of claims 1 to 7, characterized in that: It also includes a threshing box and a grain storage box arranged up and down; the pre-threshing section and the threshing section are arranged inside the threshing box and are rotatably connected to the threshing box; a second rotary drive mechanism is arranged outside the threshing box, and the output end of the second rotary drive mechanism is transmission-connected to the pre-threshing section; a stirring device is arranged inside the grain storage box, and a third rotary drive mechanism is arranged outside the grain storage box, and the output end of the third rotary drive mechanism is transmission-connected to the stirring device.

9. The regenerated rice threshing device according to claim 8, characterized in that: A humidity sensing element is provided on the feeding side of the pre-threshing section, and the humidity sensing element is connected to the second rotary drive mechanism by signal.

10. A combine harvester, characterized in that: The invention comprises the regenerated rice threshing device according to any one of claims 1 to 9.

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