Threshing and separating system of harvesting machine

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a threshing and separating system of harvesting machinery. The threshing and separating system of the harvesting machine comprises an acceleration roller, a tangential flow roller, a threshing concave plate, a separating system and a threshing machine body. The acceleration roller, the flow cutting roller and the separation system are sequentially installed on the threshing machine body, and the threshing concave plate is installed on the threshing machine body and arranged below the acceleration roller and the flow cutting roller. The accelerating roller is additionally arranged in front of the tangential flow roller, so that the working length of threshing operation is increased, the threshing separation effect can be improved, the feeding efficiency can be improved due to the arrangement of the accelerating roller, the working efficiency and the adaptability of multi-crop harvesting are improved under the same harvesting effect level, and the threshing efficiency is improved. The adaptability of harvested crops is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a threshing and separation system of a harvesting machinery. Background Art

[0002] With the continuous development of domestic animal husbandry, the demand for crop straw is increasing. Farmers have new requirements for the length of the discharged crop straw after harvesting, requiring the discharged crop straw to be longer and longer. Traditional horizontal axis flow and vertical axis flow drum harvesters cannot meet the needs of these users, but can only ensure clean threshing, small loss, and long straw discharge. The technical route of the straw walker can only be adopted. The existing products cannot guarantee the characteristics of long harvested straw, small grain loss, and good adaptability to harvested crops. Utility Model Content

[0003] The purpose of the utility model is to provide a harvesting machinery threshing and separation system, which can solve the above technical problems.

[0004] The embodiment of the present utility model is achieved as follows:

[0005] The utility model provides a harvesting machinery threshing and separation system, comprising an accelerating roller, a cutting flow roller, a threshing concave plate, a separation system and a threshing machine body;

[0006] The accelerating drum, the flow cutting drum and the separation system are sequentially mounted on the threshing machine body. The threshing concave plate is mounted on the threshing machine body and is arranged below the accelerating drum and the flow cutting drum.

[0007] In an optional embodiment, the acceleration roller includes a transmission mechanism, a cylinder, a rotating shaft and plate teeth;

[0008] The transmission mechanism and the cylinder are both arranged on the rotating shaft, and the rotating shaft is rotatably arranged on the threshing machine body;

[0009] The plate teeth are arranged on the outer wall of the cylinder.

[0010] In an optional embodiment, the transmission mechanism is a belt transmission mechanism, a chain transmission mechanism, a transmission box or a universal joint.

[0011] In an optional embodiment, the plurality of plate teeth are arranged in a spiral pattern on the cylinder.

[0012] In an optional embodiment, an observation hole is provided on the cylinder.

[0013] In an optional embodiment, the cutting flow drum includes a left grain bar, a right grain bar, a speed change wheel, a spoke disc and a drum shaft;

[0014] There are multiple webs, each of which is sleeved on the drum shaft, and the outer edges of the webs are connected via the left and right thread rods.

[0015] The left thread rod and the right thread rod are alternately arranged along the circumference of the web;

[0016] The speed-changing wheel is arranged at one end of the drum shaft.

[0017] In an optional embodiment, the threshing concave includes a first concave assembly, a concave shaft, a concave connecting rod and a second concave assembly;

[0018] The first concave plate assembly is connected to the concave plate shaft via the concave plate connecting rod;

[0019] The first concave plate assembly and the second concave plate assembly are both arc-shaped structures;

[0020] The axis of the second concave plate assembly is parallel to the axis of the first concave plate assembly, and the second concave plate assembly is arranged at one end of the first concave plate assembly;

[0021] The first concave plate assembly is arranged corresponding to the flow cutting drum, and the second concave plate assembly is arranged corresponding to the acceleration drum.

[0022] In an optional embodiment, a first adjustment device is provided on the concave plate shaft for adjusting the distance between the first concave plate assembly and the concave plate shaft.

[0023] In an optional embodiment, the distance between the threshing concave and the second concave assembly further includes a second adjusting device, which is connected to the second concave assembly and is used to adjust the gap between the second concave assembly and the first concave assembly.

[0024] In an alternative embodiment, the separation system comprises a plurality of side-by-side straw walkers.

[0025] The beneficial effects of the embodiments of the present utility model are:

[0026] By adding an acceleration roller in front of the cutting roller, the working length of the threshing operation is increased, so that the length of the straw can be increased. The setting of the acceleration roller can also improve the feeding efficiency, thereby reducing grain loss and improving the adaptability of harvesting crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A front view of a harvester threshing and separation system provided by an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the three-dimensional structure of the harvester threshing and separation system provided by an embodiment of the utility model after the threshing body is removed;

[0030] Figure 3 A schematic diagram of the three-dimensional structure of the acceleration cylinder of the harvester threshing and separation system provided by an embodiment of the utility model;

[0031] Figure 4 A schematic diagram of the three-dimensional structure of the shear drum of the harvester threshing and separation system provided by an embodiment of the utility model;

[0032] Figure 5 A schematic structural diagram of a harvester threshing and separation system provided by an embodiment of the utility model;

[0033] Figure 6 A schematic diagram of the three-dimensional structure of a straw walker of a threshing and separation system for a harvester provided by an embodiment of the utility model;

[0034] Figure 7 A schematic diagram of the three-dimensional structure of a threshing and separation system of a harvester provided by an embodiment of the utility model;

[0035] Figure 8 A schematic diagram of the three-dimensional structure of the threshing concave plate of the harvester threshing and separation system provided in an embodiment of the utility model.

[0036] Icons: 1-acceleration roller; 2-cutting flow roller; 3-threshing concave plate; 4-threshing machine body; 5-separation system; 11-cylinder body; 12-drive pulley; 13-drive shaft; 14-drive bearing; 15-wear-resistant plate; 16-plate teeth; 17-hole cover; 21-right groove rod; 22-left groove rod; 23-speed change wheel; 24-spoke plate; 25-drum shaft; 51-draft walker; 52-front crankshaft; 53-rear crankshaft; 54-key surface; 55-shell welding; 56-throwing plate; 57-power output pulley; 58-power input pulley; 31-first adjusting device; 32-adjusting pull rod; 33-fixing pull rod; 34-first concave plate assembly; 35-second concave plate assembly; 36-second adjusting device. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0042] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] The following combination Figures 1 to 8 , some embodiments of the present invention are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0044] The utility model provides a threshing and separation system 5 of a harvesting machinery, comprising an accelerating drum 1, a cutting flow drum 2, a threshing concave plate 3, a separation system 5 and a threshing machine body 4; the accelerating drum 1, the cutting flow drum and the separation system 5 are sequentially mounted on the threshing machine body 4, the threshing concave plate 3 is mounted on the threshing machine body 4, and is arranged below the accelerating drum 1 and the cutting flow drum 2.

[0045] In this embodiment, the acceleration roller 1 and the cutting flow roller 2 are mounted on the threshing machine body 4 through bearings at both ends, the left and right sides of the stone collecting trough are assembled on the threshing machine body 4 through fixing bolts, and the threshing concave plate 3 is fixed to the threshing machine body 4 through the upper rotating shaft mounting seat and bolted.

[0046] In this embodiment, after the acceleration drum 1 is added in front of the cutting drum 2, the length of the threshing process is increased, and the threshing area and the separation area are increased.

[0047] In this embodiment, the threshing concave plate 3 is arranged below the acceleration drum 1 and the cutting flow drum 2, and can cooperate with the acceleration drum 1 and the threshing drum to achieve threshing of crops while retaining longer straws.

[0048] Afterwards, the threshed straw and crop grains are separated by the separation system 5, thereby achieving the final purpose of separate harvesting.

[0049] In an optional embodiment, the acceleration drum 1 includes a transmission mechanism, a cylinder 11, a rotating shaft and plate teeth 16; the transmission mechanism and the cylinder 11 are both arranged on the rotating shaft, and the rotating shaft is rotatably arranged on the thresher body 4; the plate teeth 16 are arranged on the outer wall of the cylinder 11.

[0050] In this embodiment, the acceleration roller 1 is composed of a roller welded part and a transmission mechanism.

[0051] More specifically, in this embodiment, the roller welded parts include a cylinder 11 and plate teeth 16. The plate teeth 16 are arranged on the outer wall of the cylinder 11 to grab and hit the crops, thereby achieving the effect of accelerating the entry and threshing of the materials.

[0052] More specifically, in this embodiment, the plate teeth 16 include a support frame and a wear-resistant plate 15. The wear-resistant plate 15 is fixed to the outer wall of the cylinder 11 through the support frame, and the plate surface of the wear-resistant plate 15 is parallel to the axis of the cylinder 11, and one end of the wear-resistant plate 15 is in contact with the outer wall of the cylinder 11.

[0053] In an optional embodiment, the transmission mechanism is a belt transmission mechanism, a chain transmission mechanism, a transmission box or a universal joint.

[0054] Specifically, in this embodiment, the transmission mechanism includes a transmission pulley 12, a transmission shaft 13 and a transmission bearing 14, wherein a power device such as a motor is connected to the transmission pulley 12 through a transmission belt, and the transmission pulley 12 is connected to the cylinder 11 through the transmission shaft 13, thereby driving the cylinder 11 to rotate.

[0055] The transmission bearing 14 is arranged on the transmission shaft 13 between the transmission pulley 12 and the cylinder 11, connecting the transmission shaft 13 and the threshing body 4, reducing the friction between the transmission shaft 13 and the threshing body 4, and improving the service life of the transmission shaft 13 and the threshing body 4.

[0056] In this embodiment, the transmission mechanism can also be realized by chain transmission, that is, the transmission mechanism includes a transmission sprocket, a transmission shaft 13 and a transmission bearing 14. Similarly, the transmission bearing 14 is arranged on the transmission shaft 13 and is arranged between the transmission sprocket and the cylinder 11 to realize the connection between the transmission shaft 13 and the threshing body 4. The transmission sprocket is connected to the cylinder 11 through the transmission shaft 13, and the power unit is connected to the transmission sprocket through a transmission chain.

[0057] It should be pointed out that in this embodiment, the transmission mechanism is a belt drive or a chain drive, but it is not limited to these two transmission methods. It can also be other transmission methods, such as gear drive, transmission box or universal joint, etc. In other words, as long as it can achieve the power transmission to the cylinder 11 and drive the cylinder 11 to rotate.

[0058] In an optional embodiment, the plurality of plate teeth 16 are arranged in a spiral pattern on the cylinder 11 .

[0059] In this embodiment, the plate teeth 16 are arranged in a spiral shape on the outer wall of the cylinder 11, which can reduce the mutual interference between the plate teeth 16, increase the setting density of the plate teeth 16, increase the number of impacts on crops, and improve the threshing success rate and threshing efficiency.

[0060] It can be understood that, in this embodiment, the arrangement of the plate teeth 16 is a spiral arrangement, but it is not limited to this arrangement, and it can also be other arrangements, such as a rectangular array arrangement.

[0061] In an optional embodiment, an observation hole is provided on the cylinder 11.

[0062] In this embodiment, after the observation hole is provided on the cylinder 11, it is convenient to observe the interior of the cylinder 11, thereby improving the success rate of maintenance.

[0063] Specifically, in this embodiment, a hole cover 17 is provided at the observation hole to seal the observation hole so as to protect the interior of the cylinder 11 and prevent the external environment from causing adverse effects on the interior of the cylinder 11 .

[0064] In this embodiment, the viewing hole is in the shape of a strip hole.

[0065] It is understandable that the shape of the observation hole can be a strip hole, or other shapes, such as oval, square, circular, etc. In other words, as long as the interior of the cylinder 11 can be observed through the observation hole, it will be fine.

[0066] In an optional embodiment, the cutting flow roller 2 includes a left groove rod 22, a right groove rod 21, a speed change wheel 23, a web disc 24 and a roller shaft 25; the number of the web discs 24 is multiple, and the multiple web discs 24 are all mounted on the roller shaft 25, and the outer edges of the web discs 24 are connected through the left groove rod 22 and the right groove rod 21; the left groove rod 22 and the right groove rod 21 are alternately arranged along the circumference of the web disc 24; the speed change wheel 23 is arranged at one end of the roller shaft 25.

[0067] In this embodiment, the cutting flow drum 2 is composed of a left rib rod 22, a right rib rod 21, a web 24, a drum speed change wheel 23, a drum shaft 25 and a bearing. In order to ensure sufficient threshing and smooth feeding, the left rib rod 22 and the right rib rod 21 are alternately assembled. In order to harvest a variety of crops, the rib rods are assembled in a detachable manner. Different threshing elements can be replaced when harvesting different crops. For example, when harvesting rice, it can be switched to spike teeth. The drum speed is designed to be steplessly variable with a speed range of 400-1100r / min.

[0068] In an optional embodiment, the threshing concave 3 includes a first concave assembly 34, a concave shaft, a concave connecting rod and a second concave assembly 35; the first concave assembly 34 is connected to the concave shaft through the concave connecting rod; the first concave assembly 34 and the second concave assembly 35 are both arc-shaped structures; the axis of the second concave assembly 35 is parallel to the axis of the first concave assembly 34, and the second concave assembly 35 is arranged at one end of the first concave assembly; the first concave assembly 34 is arranged corresponding to the cutting flow drum 2, and the second concave assembly 35 is arranged corresponding to the acceleration drum 1.

[0069] Specifically, in this embodiment, the first concave plate assembly 34 of the threshing concave plate 3 is composed of a grid structure composed of multiple grid plates and cross beams, which can achieve multi-directional impact on crops, thereby cooperating with the acceleration roller 1 and the cutting flow roller 2 to improve the threshing effect.

[0070] In an optional embodiment, a first adjusting device 31 is provided on the concave plate shaft for adjusting the distance between the first concave plate assembly 34 and the concave plate shaft.

[0071] In this embodiment, the second concave assembly 35, the first concave assembly 34, the first adjusting device 31 and the second adjusting device are composed. The second concave assembly 35 of the acceleration drum 1 is hingedly connected to the first concave assembly 34 of the cutting flow drum 2, and the second concave assembly 35 of the acceleration drum 1 has a slide groove, which can move back and forth on the connecting pin shaft with the threshing concave 3, and the separation plate of the second concave assembly 35 is above the bars of the threshing concave 3.

[0072] In this embodiment, the first adjustment device 31 is mainly composed of a handle, a mounting seat, a rotating arm, a gear plate, a clamping plate, a limit plate and a transmission structure, wherein a rotating sleeve is provided outside the rotating arm.

[0073] In this embodiment, the transmission structure includes an adjusting rod 32 and a fixing rod 33 .

[0074] Specifically, in this embodiment, the handle and the pivot arm are radially fixedly connected by a key, the tooth plate and the mounting seat are hinged by a pin, the limit plate and the handle are fixedly connected by a bolt, the tooth plate passes through the gap between the limit plate and the handle, and the clamping plate and the handle are hinged by a pin; the pivot arm is hinged to one end of the connecting rod by a pin, and the other end of the connecting rod is connected to the rotating shaft sleeve by a pin, one end of the rotating shaft is radially fixedly connected to the rotating shaft sleeve by a key, and the other end is hinged to the concave plate adjustment rod 32, the other end of the rotating shaft sleeve is hinged to the concave plate adjustment rod 32, and the other end of the concave plate rod is hinged to the concave plate by a pin; the pivot arm and the pivot shaft are mounted on their respective fixed brackets through bearings.

[0075] When the gap needs to be increased, press the button on the handle, the limiting card plate rotates around the pin shaft and disengages from the slot on the tooth plate, lower the handle to a suitable position, rotate the rotating arm, rotate the swing arm counterclockwise, rotate the shaft sleeve clockwise, adjust the pull rod 32 to move downward, the threshing concave plate 3 moves away from the cutting flow drum 2, release the button, the card plate falls into the slot of the tooth plate for limiting, and the gap between the threshing concave plate 3 and the cutting flow drum 2 is increased and adjusted.

[0076] When the gap needs to be reduced, press the button on the handle, the limiting card plate rotates around the pin shaft and disengages from the slot on the tooth plate, pull the handle up to the appropriate position, the rotating arm rotates, the swing arm rotates clockwise, the rotating shaft sleeve rotates counterclockwise, the adjustment rod 32 moves upward, the threshing concave plate 3 moves close to the cutting flow roller 2, release the button, the card plate falls into the slot of the tooth plate for limiting, and the gap between the threshing concave plate 3 and the cutting flow roller 2 is reduced and adjusted.

[0077] It is understandable that the handle can be replaced by an electronically controlled hydraulic cylinder structure; the handle can be located on the left or right side of the driver in the cab, or can be set on the body outside the cab.

[0078] In an optional embodiment, the threshing concave 3 further includes a second adjusting device 36 , which is connected to the second concave assembly 35 and is used to adjust the gap between the second concave assembly 35 and the first concave assembly 34 .

[0079] In order to make the harvesting of crops more adaptable, the front and rear gaps of the threshing concave plate 3 can be adjusted synchronously, wherein the rear end gap of the second concave plate assembly 35 is automatically adjusted by the first adjusting device 31, and the front end gap is adjusted by the second adjusting device 36.

[0080] Specifically, in this embodiment, the second adjusting device 36 includes a power device and a transmission structure; the power device is connected to the second concave plate assembly 35 through the transmission structure; a slide groove is provided on the second concave plate assembly 35, and a slide rod is provided on the threshing concave plate 3, and the slide rod is slidably provided in the slide groove.

[0081] Specifically, in this embodiment, the slide grooves on the second concave plate assembly 35 are provided on the left and right end plates, and the slide rods are provided on the frame of the threshing concave plate 3 .

[0082] More specifically, in this embodiment, the shape of the chute can be oblong, rectangular, square, etc.

[0083] In this embodiment, the power device may be an electric push rod, a hydraulic cylinder, or other power devices that can provide linear motion and rotational motion, and the transmission mechanism is a rotating arm.

[0084] Specifically, in this embodiment, one end of the rotating arm is hinged to the second concave plate assembly 35, the middle rotation point is hinged to the frame of the harvester, and the other end of the rotating arm is hinged to the power unit.

[0085] In an optional embodiment, the separation system 5 includes a plurality of side-by-side straw walkers 51 .

[0086] The separation system 5 is composed of four groups of straw walkers 51. The straw walkers 51 are equipped with a front crankshaft 52, a rear crankshaft 53, a nylon bearing, a power input wheel 58, bearings and bearing mounting seats. The straw walker 51 is composed of a shell weld 55 and a key surface 54. The key surface 54 is the core component of the straw walker 51. The key surface 54 is composed of continuous protrusions and holes. The protrusions push the straw remover, and the holes are used to drain out the discharged materials, such as grains and chaff.

[0087] The four draft walkers 51 move up and down and back and forth in sequence along the circumference of the crankshaft.

[0088] The draft-pulling wheel is connected to a power output pulley 57, a bearing, a power input pulley 58, a draft-pulling wheel shaft and a throwing plate 56. It is a core component that guides and throws the threshed material to the separation device.

[0089] The walker 51 is connected to the crankshaft through a nylon bearing bush, which is divided into two halves, holding the crankshaft and having a clearance fit with the crankshaft.

[0090] The nylon tile seat is fixedly connected to the straw walker 51 by bolts.

[0091] The straw shaker 51 is mounted on the separation body through bearings on the left and right sides of the front and rear crankshafts 53.

[0092] The beneficial effects of the embodiments of the present utility model are:

[0093] By adding an acceleration drum 1 in front of the cutting drum 2, the working length of the threshing operation is increased, thereby increasing the length of the straw. The setting of the acceleration drum 1 can also improve the feeding efficiency, thereby reducing grain loss and improving the adaptability of harvesting crops.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A harvesting machinery threshing and separation system, characterized in that: It includes an accelerating roller, a cutting flow roller, a threshing concave plate, a separation system and a threshing machine body; The accelerating drum, the flow cutting drum and the separation system are sequentially mounted on the threshing machine body. The threshing concave plate is mounted on the threshing machine body and is arranged below the accelerating drum and the flow cutting drum.

2. The harvesting machinery threshing and separation system according to claim 1, characterized in that: The accelerating roller comprises a transmission mechanism, a cylinder, a rotating shaft and plate teeth; The transmission mechanism and the cylinder are both arranged on the rotating shaft, and the rotating shaft is rotatably arranged on the threshing machine body; The plate teeth are arranged on the outer wall of the cylinder.

3. The harvesting machinery threshing and separation system according to claim 2, characterized in that: The transmission mechanism is a belt transmission mechanism, a chain transmission mechanism, a transmission box or a universal joint.

4. The harvesting machinery threshing and separation system according to claim 2, characterized in that: The plurality of plate teeth are arranged in a spiral pattern on the cylinder.

5. The harvesting machinery threshing and separation system according to claim 2, characterized in that: An observation hole is provided on the cylinder.

6. The harvesting machinery threshing and separation system according to claim 1, characterized in that: The cutting flow roller comprises a left rib rod, a right rib rod, a speed change wheel, a spoke disc and a roller shaft; There are multiple webs, each of which is sleeved on the drum shaft, and the outer edges of the webs are connected via the left and right thread rods. The left thread rod and the right thread rod are alternately arranged along the circumference of the web; The speed-changing wheel is arranged at one end of the drum shaft.

7. The harvesting machinery threshing and separation system according to claim 1, characterized in that: The threshing concave plate comprises a first concave plate assembly, a concave plate shaft, a concave plate connecting rod and a second concave plate assembly; The first concave plate assembly is connected to the concave plate shaft via the concave plate connecting rod; The first concave plate assembly and the second concave plate assembly are both arc-shaped structures; The axis of the second concave plate assembly is parallel to the axis of the first concave plate assembly, and the second concave plate assembly is arranged at one end of the first concave plate assembly; The first concave plate assembly is arranged corresponding to the flow cutting drum, and the second concave plate assembly is arranged corresponding to the acceleration drum.

8. The harvesting machinery threshing and separation system according to claim 7, characterized in that: The concave plate shaft is provided with a first adjusting device for adjusting the distance between the first concave plate assembly and the cutting flow drum.

9. The harvesting machinery threshing and separation system according to claim 7, characterized in that: The threshing concave further comprises a second adjusting device, which is connected to the second concave assembly and is used for adjusting the gap between the acceleration drum and the second concave assembly.

10. The harvesting machinery threshing and separation system according to claim 1, characterized in that: The separation system includes a plurality of side-by-side straw walkers.

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