A cleaning device and combine harvester

Abstract

The application provides a kind of cleaning device and combine harvester, including controller, cleaning bin, first cleaning screen, second cleaning screen, fan, grain auger and cyclone separation assembly;The controller is connected with first cleaning screen, second cleaning screen, fan, grain auger and cyclone separation assembly respectively;The cleaning bin is connected with fan at one end, and the other end of the cleaning bin is provided with first straw outlet, and the cleaning bin is also provided with material input port, grain auger, first cleaning screen and second cleaning screen are located inside the cleaning bin, grain auger is installed at the bottom of the cleaning bin, and the material output port is provided near the grain auger of the cleaning bin, and the material output port is connected with cyclone separation assembly.The cleaning device described in the application, the discharge of long impurities in the discharge material is realized by the rotation of the fan airflow and the cylinder screen in the primary cleaning, the airflow generated by the impurity suction fan is sucked in the cyclone separation cylinder in the secondary cleaning, the separation of light impurities and grains is realized, and the cleaning efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of agricultural machinery, and particularly relates to a cleaning device and a combine harvester. BACKGROUND

[0002] Hilly areas account for 34.62% of the cultivated land area in China, and are important grain production areas in China. However, the hilly areas have complex terrain, narrow machine plowing ways, small and variously shaped plots, and certain slope, which makes it difficult for agricultural machinery in the plain areas to work in the hilly areas, and the comprehensive mechanization rate of crop cultivation and harvesting in the hilly areas is less than 50%, which is quite different from the level of more than 80% of the main grain crops in China. Therefore, accelerating the development of the short board of agricultural mechanization in the hilly areas is one of the focuses of the current national agricultural mechanization development.

[0003] The cleaning device is a key core component of the combine harvester, and determines the operation performance and efficiency of the whole machine. Most of the cleaning devices of existing large and medium-sized combine harvesters adopt a "fan + vibrating screen" type cleaning method, but this cleaning method occupies a large space and is not suitable for mechanized harvesting in the hilly areas. The existing cleaning device of the combine harvester mainly adopts a cyclone separation and cleaning device. The device mainly consists of a scraper elevator, a cyclone separation cylinder, a suction fan and a conveying pipeline. When working, the detached objects are accelerated by the scraper elevator and then thrown into the cyclone separation cylinder at a high speed along the tangent direction of the cyclone separation cylinder. The high-speed airflow of the suction fan forms a high-speed airflow field in the cyclone separation cylinder. Under the joint action of inertia, gravity and airflow, the grains with different suspension coefficients are discharged downward through the grain outlet below the cyclone separation cylinder, and the residues with small suspension coefficients are discharged outside the machine through the residue discharge port above the cyclone separation cylinder along the conveying pipeline. The existing technology can avoid the breakage caused by the impact of the grain feeding by pneumatic conveying of the detached objects into the cyclone separation cylinder and increasing the separation net inside the cyclone separation cylinder. However, when harvesting on a slope, the cyclone separation cylinder and the separation net inside cannot be kept vertical, which will increase the cleaning loss rate and the residue rate. The existing technology adopts a combination of a vibrating screen and a suction fan, which is a simplified version of the air screen cleaning device. Compared with the cyclone separation and cleaning device, the structure is complex, the cleaning performance is improved limitedly, and the weight of the whole machine is large. SUMMARY

[0004] The present application aims to at least partly solve one of the above technical problems.

[0005] To this end, the present application provides a cleaning device and a combine harvester. The cleaning device can discharge long residues compared with the traditional cyclone separation system, and the cyclone separation assembly only needs to discharge light residues, which reduces the cleaning pressure of the cyclone separation assembly, ensures the cleaning rate of the grains and reduces the loss rate.

[0006] The technical scheme of the present application is: a cleaning device, comprising a controller, a cleaning bin, a first cleaning screen, a second cleaning screen, a fan, a grain stirrer and a cyclone separation assembly;

[0007] The controller is connected with the first cleaning screen, the second cleaning screen, the fan, the grain stirrer and the cyclone separation assembly respectively;

[0008] One end of the cleaning bin is connected with the fan, the other end of the cleaning bin is provided with a first straw discharge port, the cleaning bin is further provided with a material input port, the grain stirrer, the first cleaning screen and the second cleaning screen are located inside the cleaning bin, the grain stirrer is installed at the bottom of the cleaning bin, the cleaning bin is provided with a material output port near the grain stirrer, and the material output port is connected with the cyclone separation assembly.

[0009] The above scheme further comprises an inclination adjusting mechanism;

[0010] The wall surface of the cleaning bin is provided with a first sliding channel, the first cleaning screen and the second cleaning screen are respectively provided with rotating shafts, the rotating shafts are matched with the first sliding channel, the inclination adjusting mechanism is connected with the controller, the inclination adjusting mechanism is installed on the wall surface of the cleaning bin, the inclination adjusting mechanism is connected with the rotating shafts, the rotating shafts are driven to slide along the first sliding channel, the inclination angles of the first cleaning screen and the second cleaning screen are adjusted, and the first cleaning screen and the second cleaning screen are kept horizontal.

[0011] In the above scheme, the inclination adjusting mechanism comprises a right-angled triangular sliding block, a vertical sliding block, a second sliding channel and a guard plate;

[0012] The second sliding channel is installed on the wall surface of the cleaning bin, one face of the right-angled triangular sliding block is connected with the second sliding channel, one end of the vertical sliding block is in contact with the face of the right-angled triangular sliding block, the other end of the vertical sliding block is connected with the rotating shaft, and the guard plate is installed on the two sides of the first sliding channel in a vertical direction to form a guide channel, the movement of the right-angled triangular sliding block can make the vertical sliding block move up and down in the guide channel, the rotating shaft moves along the first sliding channel, and the inclination angles of the first cleaning screen and the second cleaning screen are adjusted.

[0013] The above scheme further comprises a telescopic assembly;

[0014] The telescopic assembly is connected with the right-angled triangular sliding block, and the telescopic assembly is installed on the wall surface of the cleaning bin and connected with the controller.

[0015] The above scheme further comprises an inclination sensor; the inclination sensor is installed on the rotating shaft of the first cleaning screen and the second cleaning screen respectively;

[0016] The inclination sensor is connected with the controller; the inclination sensor is used for detecting the inclination angle of the first cleaning screen and the second cleaning screen and transmitting to the controller, and the controller controls the telescopic assembly to drive the right-angled triangular slider according to the inclination angle, adjusts the height of the vertical slider, thereby adjusting the inclination angle of the first cleaning screen and the second cleaning screen, and makes the first cleaning screen and the second cleaning screen keep horizontal.

[0017] In the scheme, the cyclone separation assembly comprises a scraper elevator, a cyclone separation cylinder, an output pipeline, a dust suction fan, a cyclone separation input port, a grain outlet and a second straw outlet.

[0018] The cyclone separation input port is connected with the scraper elevator and the material outlet respectively, the scraper elevator is connected with the cyclone separation cylinder, the cyclone separation cylinder is provided with the grain outlet and the second straw outlet respectively, one end of the output pipeline is connected with the second straw outlet, and the other end of the output pipeline is connected with the dust suction fan.

[0019] In the scheme, the side of the first cleaning screen and the second cleaning screen is a stainless steel woven mesh.

[0020] In the scheme, the first cleaning screen and the second cleaning screen are not in contact with the bottom or the top of the cleaning bin.

[0021] A combine harvester comprising the cleaning device, further comprising a threshing bin.

[0022] The bottom end of the threshing bin is provided with a discharge conveying auger, the bottom end of the threshing bin is connected with the cleaning bin, and the connecting portion is provided with a material input port.

[0023] In the scheme, the two ends of the discharge conveying auger are provided with blades, the rotating directions of the blades at the two ends are opposite, and the material input port corresponds to the middle part of the discharge conveying auger.

[0024] Compared with the prior art, the cleaning device has the following beneficial effects:

[0025] 1. The cleaning device can be installed on the side of the harvester, thereby reducing the height of the whole machine and realizing lightweight.

[0026] 2. Compared with the traditional cyclone separation system, the cleaning bin can remove long impurities, and the cyclone separation only needs to remove light impurities, thereby reducing the cleaning pressure of the cyclone separation assembly, ensuring the cleaning rate of the grains and reducing the grain loss rate.

[0027] 3. Compared with the wind screen type cleaning device used in the medium and large combine harvesters, the cleaning device has compact structure, simple structure and small space occupation, can meet the cleaning demand of the harvester in limited space, and is more suitable for complex terrain and small field area in hilly areas.

[0028] 4. The cleaning device, the primary cleaning is realized by the fan airflow and the rotation of the cleaning screen to discharge the long and light impurities in the discharged material, the secondary cleaning is realized by the airflow generated by the fan to suck the light impurities in the cyclone separation cylinder, so as to separate the light impurities from the grains and improve the cleaning efficiency.

[0029] 5. The first cleaning screen and the second cleaning screen are always kept horizontal by the inclination adjusting mechanism, so that the device is more suitable for the slope harvesting in hilly areas, thereby improving the cleaning rate of the grains and reducing the loss rate of the grains. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structure schematic diagram of the cleaning device of an embodiment of the present application.

[0031] Figure 2 is a three-dimensional diagram of the cleaning device of an embodiment of the present application.

[0032] Figure 3 is a structure schematic diagram of the cyclone separation assembly of the cleaning device of an embodiment of the present application.

[0033] Figure 4 is a structure schematic diagram of the inclination adjusting mechanism of the cleaning device of an embodiment of the present application.

[0034] Figure 5 is a structure schematic diagram of the grain stirring auger of the cleaning device of an embodiment of the present application.

[0035] Figure 6 is a structure schematic diagram of the discharged material conveying auger of the cleaning device of an embodiment of the present application.

[0036] Figure 7 is a structure schematic diagram of the threshing bin of the cleaning device of an embodiment of the present application.

[0037] Figure 8 is a position relationship schematic diagram of the grain stirring auger and the material output port of the cleaning device of an embodiment of the present application.

[0038] Figure 9 is a perspective view schematic diagram of the cleaning device of an embodiment of the present application.

[0039] In the figure: 1, cleaning bin; 2, first cleaning screen; 3, second cleaning screen; 4, discharge conveying auger; 5, fan; 6, inclination adjusting mechanism; 7, grain auger; 8, cyclone separation assembly; 9, material input port; 10, material output port; 11, first straw discharge port; 12, threshing bin; 21, first slide; 6-1, triangular slide block; 6-2, vertical slide block; 6-3, second slide; 6-4, guard plate; 8-1, scraper elevator; 8-2, cyclone separation cylinder; 8-3, output pipeline; 8-4, impurity suction fan; 8-5, cyclone separation input port; 8-6, grain outlet; 8-7, second straw discharge port; DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations throughout the several figures of the drawings and any description set forth herein. The embodiments described below are presented by way of example to explain the present application, and are not intended to limit the present application.

[0041] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "front", "back", "left", "right", "up", "down", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Figure 1 、 2, 5, 7, 8, 9 are shown as the combined harvester cleaning device of a preferred embodiment, including a controller, cleaning bin 1, power supply, first cleaning screen 2, second cleaning screen 3, fan 5, grain auger 7 and cyclone separation assembly 8;

[0044] The power supply is connected with the controller, and the controller is connected with the first cleaning screen 2, the second cleaning screen 3, the fan 5, the grain auger 7 and the cyclone separation assembly 8 respectively.

[0045] One end of the cleaning bin 1 is connected with the fan 5, the other end of the cleaning bin 1 is provided with a first straw outlet 11, and the cleaning bin 1 is further provided with a material input port 9. The grain auger 7, the first cleaning screen 2 and the second cleaning screen 3 are located inside the cleaning bin 1. The grain auger 7 is installed at the bottom of the cleaning bin 1. The cleaning bin 1 is provided with a material output port 10 near the grain auger 7, and the material output port 10 is connected with the cyclone separation assembly 8.

[0046] Preferably, it further comprises an inclination adjusting mechanism 6.

[0047] The wall surface of the cleaning bin 1 is provided with a first slide 21. The first cleaning screen 2 and the second cleaning screen 3 are respectively provided with a rotating shaft. The rotating shaft is matched with the first slide 21. The inclination adjusting mechanism 6 is connected with the controller. The inclination adjusting mechanism 6 is installed on the wall surface of the cleaning bin 1. The inclination adjusting mechanism 6 is connected with the rotating shaft. The rotating shaft is driven to slide along the first slide 21. The inclination angle of the first cleaning screen 2 and the second cleaning screen 3 is adjusted. The first cleaning screen 2 and the second cleaning screen 3 are kept horizontal.

[0048] As shown in Figure 4 Preferably, the number of the inclination adjusting mechanism 6 is 4. The inclination adjusting mechanism 6 comprises a right-angled triangle slider 6-1, a vertical slider 6-2, a second slide 6-3 and a guard plate 6-4.

[0049] The second slide 6-3 is installed on the wall surface of the cleaning bin 1. The surface where one right angle side of the right-angled triangle slider 6-1 is located is connected with the second slide 6-3. One end of the vertical slider 6-2 is in contact with the surface where the oblique side of the right-angled triangle slider 6-1 is located. The other end of the vertical slider 6-2 is connected with the rotating shaft. The guard plate 6-4 is installed on both sides of the first slide 21 to form a guide channel. The movement of the right-angled triangle slider 6-1 can make the vertical slider 6-2 move up and down in the guide channel, so that the rotating shaft moves along the first slide 21, and the inclination angle of the first cleaning screen 2 and the second cleaning screen 3 is adjusted.

[0050] Preferably, it further comprises a telescopic assembly 6-5.

[0051] The telescopic assembly 6-5 is connected with the right-angled triangle slider 6-1. The telescopic assembly 6-5 is installed on the wall surface of the cleaning bin 1. The telescopic assembly 6-5 is connected with the controller.

[0052] Preferably, it also includes a tilt sensor; the tilt sensor is respectively installed on the rotating shaft of the first cleaning screen 2 and the second cleaning screen 3;

[0053] The tilt sensor is connected to the controller; the tilt sensor is used to detect the tilt angle of the first cleaning screen 2 and the second cleaning screen 3 and transmit it to the controller. The controller controls the telescopic component 6-5 to drive the right-angled triangular slider 6-1 according to the tilt angle, and adjusts the height of the vertical slider 6-2, thereby adjusting the tilt angle of the first cleaning screen 2 and the second cleaning screen 3 so that the first cleaning screen 2 and the second cleaning screen 3 remain horizontal.

[0054] The tilt sensor is connected to the controller. In the initial state, the first cleaning screen 2 and the second cleaning screen 3 are placed in a horizontal position, and the tilt sensor is calibrated to identify this position as a reference. The tilt sensor continuously detects the tilt angle of the first cleaning screen 2 and the second cleaning screen 3 and feeds this data back to the controller. The controller calculates the difference between the current tilt angle of the first cleaning screen 2 and the second cleaning screen 3 and the target horizontal position based on the feedback information from the tilt sensor. According to the calculation result, the controller issues a corresponding command to adjust the tilt adjustment mechanism 6 so that the first cleaning screen 2 and the second cleaning screen 3 gradually return to the horizontal position. The adjusted first cleaning screen 2 and the second cleaning screen 3 will be detected by the tilt sensor again, and the actual tilt angle will be fed back to the controller again. According to the feedback information, the controller continuously fine-tunes the electric actuator until the first cleaning screen 2 and the second cleaning screen 3 are kept horizontal. Once the first cleaning screen 2 and the second cleaning screen 3 reach the horizontal position, the controller will continue to monitor the feedback from the tilt sensor to maintain the stable horizontal state of the first cleaning screen 2 and the second cleaning screen 3.

[0055] like Figure 3 As shown, preferably, the cyclone separator assembly 8 includes a scraper lifter 8-1, a cyclone separator cylinder 8-2, an output pipe 8-3, a suction fan 8-4, a cyclone separator inlet 8-5, a grain outlet 8-6, and a second row of straw outlet 8-7.

[0056] The cyclone separator inlet 8-5 is connected to the scraper elevator 8-1 and the material outlet 10 respectively. The scraper elevator 8-1 is connected to the cyclone separator 8-2. The cyclone separator 8-2 is provided with a grain outlet 8-6 and a second row of straw outlet 8-7 respectively. One end of the output pipe 8-3 is connected to the second row of straw outlet 8-7, and the other end of the output pipe 8-3 is connected to the suction fan 8-4.

[0057] Preferably, the sides of the first cleaning screen 2 and the second cleaning screen 3 are made of stainless steel woven mesh with a diameter of 10-15mm, which is selected according to the characteristics of the crop's excrement.

[0058] Preferably, the first cleaning screen 2 and the second cleaning screen 3 do not contact the bottom or top of the cleaning chamber 1.

[0059] Preferably, the angle between the first cleaning screen 2 and the second cleaning screen 3 and the horizontal plane is -25° to 25°.

[0060] Preferably, the first cleaning screen 2 and the second cleaning screen 3 are made of stainless steel woven mesh with a diameter of 1mm and an aperture of 13mm×13mm, which has a better cleaning effect.

[0061] Preferably, the distance between the first cleaning screen 2 and the second cleaning screen 3 can be freely adjusted according to the crop properties, and can be selected as 10-15mm, depending on the characteristics of the crop's excrement.

[0062] The cleaning process of the micro combine harvester cleaning device is a two-stage cleaning process. The first cleaning is carried out by the first cleaning screen 2, the second cleaning screen 3 and the blower 5 to remove long impurities from the output. The second cleaning is carried out by the cyclone separation cleaning component 8 to remove light impurities after the first cleaning.

[0063] During the initial cleaning process, the long impurities in the material are discharged from the first discharge outlet under the combined action of the tangential force of the first cleaning screen 2 and the second cleaning screen 3 rotating counterclockwise and the airflow of the blower 5.

[0064] A combine harvester including the above-mentioned cleaning device further includes a threshing bin 12;

[0065] The bottom of the threshing chamber 12 is equipped with a conveying auger 4 for the threshing material, and the bottom of the threshing chamber 12 is connected to the cleaning chamber 1, with a material input port 9 at the connection.

[0066] like Figure 6 As shown, preferably, the auger 4 for conveying the extruded material is provided with blades at both ends, the blades at both ends rotate in opposite directions, and the material inlet 9 corresponds to the middle of the auger 4 for conveying the extruded material.

[0067] The adjustment principle of the tilt angle adjustment mechanism 6 is as follows: When the combine harvester is working on a slope, the tilt angle sensor continuously detects the tilt angle of the first cleaning screen 2 and the second cleaning screen 3, and feeds this data back to the controller. The controller controls the telescopic component 6-5 in the tilt angle adjustment mechanism 6 to push the triangular slider 6-1 to move along the second slide rail 6-3, so that the lower end of the vertical slider 6-2 slides along the inclined side of the triangular slider 6-1. Under the action of the guard plate 6-4, the upper end of the vertical slider 6-2 slides up and down along the guide channel, so that the tilt angle of the first cleaning screen 2 or the second cleaning screen 3 changes relative to the horizontal plane. Through the control of the tilt angle adjustment mechanism 6 at both ends of the first cleaning screen 2 and the second cleaning screen 3 by the controller, and through the continuous detection of the tilt angle sensor, the first cleaning screen 2 or the second cleaning screen 3 is kept horizontal, thereby ensuring the grain cleaning rate and reducing the grain loss rate.

[0068] Working principle:

[0069] The threshed material is transported by the threshing delivery auger 4 to the material input port 9 of the cleaning bin 1, and is discharged into the cleaning bin 1. Under the combined action of the first cleaning screen 2, the second cleaning screen 3 and the air flow blown by the fan 5, the threshed material is screened by the first cleaning screen 2 and the second cleaning screen 3 respectively. Some long impurities mixed in the threshed material are discharged from the first straw discharge port 11. The seeds and other impurities are transported by the seed auger 7 to the cyclone separation system 8 through the seed output port 10. The material enters the cyclone separation input port 8-5, rises along the scraper elevator 8-1, and enters the cyclone separation cylinder 8-2 in a tangential direction. Under the action of the impurity suction fan 8-4, the material continuously rotates along the center in the cyclone separation cylinder 8-2. Under the combined action of inertia, gravity and the suction force of the impurity suction fan 8-4, the suspension coefficients of various materials are different. The light impurities are discharged from the second straw discharge port 8-7, along the output pipeline 8-3, and from the impurity suction fan 8-4. The seeds are discharged from the grain outlet 8-6 of the cyclone separation cylinder 8-2.

[0070] It should be understood that although the present specification is described in terms of various embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0071] The above series of detailed descriptions are only specific descriptions of feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A cleaning device, characterized in that The utility model relates to a kind of grain cleaning machines, including controller, cleaning bin (1), first cleaning screen (2), second cleaning screen (3), fan (5), grain auger (7) and cyclone separation component (8); The controller is connected with the first cleaning screen (2), the second cleaning screen (3), the fan (5), the grain auger (7) and the cyclone separation component (8) respectively; One end of the cleaning bin (1) is connected with the fan (5), the other end of the cleaning bin (1) is provided with a first straw discharge port (11), the cleaning bin (1) is further provided with a material input port (9), the grain auger (7), the first cleaning screen (2) and the second cleaning screen (3) are located inside the cleaning bin (1), the grain auger (7) is installed at the bottom of the cleaning bin (1), the cleaning bin (1) is provided with a material output port (10) near the grain auger (7), and the material output port (10) is connected with the cyclone separation component (8); The utility model further includes an inclination adjusting mechanism (6); The wall surface of the cleaning bin (1) is provided with a first slide (21), the first cleaning screen (2) and the second cleaning screen (3) are respectively provided with a rotating shaft, the rotating shaft is matched with the first slide (21), the inclination adjusting mechanism (6) is connected with the controller, the inclination adjusting mechanism (6) is installed on the wall surface of the cleaning bin (1), the inclination adjusting mechanism (6) is connected with the rotating shaft, drives the rotating shaft to slide along the first slide (21), adjusts the inclination angle of the first cleaning screen (2) and the second cleaning screen (3), so that the first cleaning screen (2) and the second cleaning screen (3) remain horizontal; The inclination adjusting mechanism (6) includes a right-angled triangle slider (6-1), a vertical slider (6-2), a second slide (6-3) and a guard plate (6-4); The second slide (6-3) is installed on the wall surface of the cleaning bin (1), one side of the right-angled triangle slider (6-1) is connected with the second slide (6-3), one end of the vertical slider (6-2) is in contact with the side of the right-angled triangle slider (6-1), the other end of the vertical slider (6-2) is connected with the rotating shaft, and the guard plate (6-4) is installed on both sides of the first slide (21) in a vertical manner to form a guide channel, the movement of the right-angled triangle slider (6-1) can make the vertical slider (6-2) move up and down in the guide channel, so that the rotating shaft moves along the first slide (21), and the inclination angle of the first cleaning screen (2) and the second cleaning screen (3) is adjusted; The utility model further includes a telescopic assembly (6-5); The telescopic assembly (6-5) is connected with the right-angled triangle slider (6-1), and the telescopic assembly (6-5) is installed on the wall surface of the cleaning bin (1) and connected with the controller; The utility model further includes an inclination sensor, and the inclination sensor is installed on the rotating shaft of the first cleaning screen (2) and the second cleaning screen (3) respectively; The inclination sensor is connected with the controller, and the inclination sensor is used for detecting the inclination angle of the first cleaning screen (2) and the second cleaning screen (3) and transmitting the inclination angle to the controller, the controller controls the telescopic assembly (6-5) to drive the right-angled triangle slider (6-1) according to the inclination angle, adjusts the height of the vertical slider (6-2), thereby adjusts the inclination angle of the first cleaning screen (2) and the second cleaning screen (3), so that the first cleaning screen (2) and the second cleaning screen (3) remain horizontal. The first cleaning screen (2) and the second cleaning screen (3) are not in contact with the bottom or the top of the cleaning bin (1); The cyclone separation assembly (8) comprises a scraper elevator (8-1), a cyclone separation cylinder (8-2), an output pipeline (8-3), a dust fan (8-4), a cyclone separation input port (8-5), a grain outlet (8-6) and a second straw outlet (8-7); The cyclone separation input port (8-5) is connected with the scraper elevator (8-1) and the material output port (10) respectively, the scraper elevator (8-1) is connected with the cyclone separation cylinder (8-2), the cyclone separation cylinder (8-2) is provided with the grain outlet (8-6) and the second straw outlet (8-7) respectively, one end of the output pipeline (8-3) is connected with the second straw outlet (8-7), and the other end of the output pipeline (8-3) is connected with the dust fan (8-4).

2. The cleaning apparatus of claim 1, wherein, The side surface of the first cleaning screen (2) and the second cleaning screen (3) is a stainless steel woven mesh.

3. A combine harvester comprising a cleaning device according to claim 1 or 2, characterized in that Further comprising a threshing bin (12); The bottom end of the threshing bin (12) is provided with a threshing product conveying auger (4), the bottom end of the threshing bin (12) is connected with the cleaning bin (1), and the connecting position is provided with a material input port (9).

4. The combine harvester according to claim 3, characterized in that The threshing product conveying auger (4) is provided with blades at two ends, the rotating directions of the blades at the two ends are opposite, and the material input port (9) corresponds to the middle part of the threshing product conveying auger (4). The bottom end of the threshing bin (12) is provided with a threshing product conveying auger (4), the bottom end of the threshing bin (12) is connected with the cleaning bin (1), and the connecting position is provided with a material input port (9).

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