Vibrating screen frequency adjustable cleaning device based on hill and mountain corn harvester

Abstract

The utility model relates to the technical field of screening devices of corn harvesters, and discloses a frequency-adjustable cleaning device based on a vibrating screen of a hill and mountain corn harvester, which comprises a shell, a rack is fixedly assembled on the outer wall of the shell, an upper fixing plate is fixedly assembled on the outer wall of the rack, and a lower fixing plate is fixedly assembled on the outer wall of the upper fixing plate. A corrugated plate is fixedly assembled on the outer wall of the upper fixing plate, a motor is fixedly assembled on the outer wall of the machine frame, an output shaft of the motor is fixedly connected with a belt wheel in a sleeved mode, and a transmission belt is connected to the middle of the belt wheel in a rolling mode. Through the arrangement of the vibration exciter, the screen piece supporting rod, the second-stage screen and the screen piece fixing plate, the vibration frequency of the vibration exciter on the second-stage screen is changed in real time along with the increase of the inclination angle of the machine tool in the corn cleaning process, and accumulation of materials on the second-stage screen when the machine tool works in a steep mountain land is reduced; and the adaptability of the cleaning device to different inclination angles and the fluency in the cleaning process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of corn harvester screening devices, in particular to a screening device with adjustable frequency of a vibrating screen of a corn harvester in hilly and mountainous areas. Background Art

[0002] Corn harvesting operations are the key to corn production, including harvesting, threshing, separation, and cleaning. The use of mechanical harvesting in basin areas is a key link in the comprehensive mechanization technology for improving corn quality and efficiency. However, due to the limitations of the terrain, the full mechanization of hilly corn production has become the weakest link.

[0003] In areas with rugged terrain and heavy rainfall, harvesters cannot perform their functions in hilly and mountainous areas, and the final harvest is not satisfactory. In the mechanized harvesting process of corn, the components that have force on corn kernels include cutters, augers, conveyor chains, threshing drums, gravure screens, and cleaning screens. When the machine is not suitable, the impurity rate caused by the cleaning part is as high as 25%-30%. According to simulation experiments, when the machine is operating on a 7° slope, the material accumulation rate reaches 10%. As the inclination angle of the machine increases, the accumulation rate gradually increases. During the cleaning process, some materials will be stuck in the sieve holes of the screen and between the sieve plates of the fish scale screen. At the same time, due to the continuous increase in the amount of material fed and the influence of the inclination angle of the machine, the impurity rate and accumulation rate of the material are eventually too large. For this reason, we propose a cleaning device based on a hilly and mountainous corn harvester with an adjustable frequency vibrating screen. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a cleaning device with adjustable frequency based on the vibrating screen of a corn harvester in hilly and mountainous areas. It has the advantages of being able to adjust the vibration frequency according to changes in the feed amount while ensuring that materials do not accumulate or clog on the screen when the machine is operating, thereby solving the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a frequency-adjustable cleaning device for a corn harvester vibrating screen in hilly and mountainous areas, comprising a shell, a frame fixedly mounted on the outer wall of the shell, an upper fixed plate fixedly mounted on the outer wall of the frame, a corrugated plate fixedly mounted on the outer wall of the upper fixed plate, a motor fixedly mounted on the outer wall of the frame, a pulley fixedly sleeved on the output shaft of the motor, a transmission belt rollingly connected to the middle of the pulley, a rear axle of the vibrating screen fixedly sleeved on the inner wall of the pulley, an amplitude adjustment plate fixedly mounted on the end of the rear axle of the vibrating screen, an eccentric sleeve fixedly mounted on the outer wall of the amplitude adjustment plate, and the eccentric sleeve The inner wall of the connecting bearing is fixedly sleeved, the inner wall of the connecting bearing is plugged with a cam, a screw is placed between the cam and the connecting bearing, the outer wall of the screw is threadedly connected with an adjusting block, the outer wall of the adjusting block is fixedly equipped with a retaining spring, the outer wall of the cam is tightly fitted with an amplitude adjustment plate, the outer wall of the amplitude adjustment plate is provided with a shaft sleeve, the outer wall of the shaft sleeve is tightly fitted with an outer fixing plate of the vibrating screen, the outer wall of the outer fixing plate of the vibrating screen is fixedly assembled with the inner fixing plate of the vibrating screen, a primary screen is provided on the left side of the corrugated plate, the outer wall of the frame is respectively fixedly equipped with an upper mounting plate of a fish scale screen and a lower mounting plate of a fish scale screen, the fish The outer walls of the fish scale screen upper mounting plate and the fish scale screen lower mounting plate are both rotatably connected with the fish scale screen, the outer wall of the fish scale screen is fixedly equipped with a screen support rod, the outer wall of the screen support rod is fixedly equipped with a screen fixing plate, the outer wall of the screen fixing plate is rotatably connected with a draft remover fixing plate, the outer wall of the draft remover fixing plate is fixedly equipped with a draft remover screen plate, the inner wall of the shell is fixedly equipped with a primary screen, the inner wall of the shell is slidably connected with a secondary screen, the outer wall of the secondary screen is fixedly equipped with a vibrating screen front shaft, the outer wall of the frame is also fixedly equipped with a fixing plate 1 and a fixing plate 2 respectively, the fixing plate 1 and the fixing plate 2 The outer walls of the two plates are all fixedly equipped with grooves, the inner walls of the grooves are rollingly connected with deep groove ball bearings, the outer wall of the motor is fixedly equipped with a protective shell, the inner wall of the protective shell is fixedly equipped with a top block, the inner wall of the top block is slidably connected with a guide column, the outer wall of the guide column is fixedly equipped with a pressing plate, the bottom of the pressing plate is abutted with a return spring, the top of the protective shell is fixedly equipped with an electromagnet, the outer wall of the electromagnet is fixedly sleeved with a bottom cover, the outer wall of the bottom cover is sleeved with an electromagnet, the inner wall of the shell is slidably connected with a mounting plate, the top of the mounting plate is fixedly equipped with a vibrator, and the outer wall of the frame is fixedly equipped with a material receiving bin.

[0006] As an optimal technical solution of the utility model: the connecting bearing is fixedly connected to the screw through the inner fixing plate of the vibrating screen, the outer fixing plate of the vibrating screen, the bushing and the screw rod. The number of the connecting bearings is two, and the two connecting bearings are symmetrically distributed along the outer wall of the rear shaft of the vibrating screen.

[0007] As a preferred technical solution of the utility model: the output shaft of the vibrator is fixedly assembled with the bottom of the secondary screen, and the secondary screen is located directly above the material receiving bin.

[0008] As a preferred technical solution of the utility model: the number of the pulleys is two, and the two pulleys are connected by a transmission belt.

[0009] As a preferred technical solution of the utility model: the mounting plate on the fish scale sieve is made of galvanized iron metal, the number of the sieve fixing plates is several, and the several sieve fixing plates are evenly distributed along the outer wall of the fish scale sieve.

[0010] As a preferred technical solution of the utility model: a controller is fixedly mounted on the outer wall of the shell, and the controller is electrically connected to the vibrator, the motor, and the electromagnet respectively.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The cleaning device, through the provision of a vibrator, a screen support rod, a secondary screen, and a screen fixing plate structure, enables the device to change the vibration frequency of the secondary screen by the vibration device in real time as the inclination angle of the machine increases during the cleaning process of corn, thereby reducing the accumulation of materials on the secondary screen when the machine is operating in a steep mountainous area, and improving the adaptability of the cleaning device to different inclination angles and the smoothness of the cleaning process.

[0013] 2. The cleaning device changes the amplitude of the entire cleaning device by changing the return distance of the cam through the rear shaft of the vibrating screen and the cam, and then adjusts the rotation speed of the pulley to adjust the vibration frequency of the vibrating screen, thereby improving the screening effect of the cleaning device on corn and improving the quality of corn output. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the frame structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the screen structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the primary screen and the secondary screen of the utility model;

[0018] Figure 5 This is a schematic diagram of the exploded structure of the pulley and transmission assembly of the utility model;

[0019] Figure 6 This is a schematic diagram of the internal structure of the protective shell of the utility model.

[0020] In the figure: 1. Shell; 2. Frame; 3. Corrugated plate; 4. Primary screen; 5. Fish scale screen; 6. Upper mounting plate for fish scale screen; 7. Lower mounting plate for fish scale screen; 8. Upper fixing plate; 9. Secondary screen; 10. Front axle of vibrating screen; 11. Deep groove ball bearing; 12. Fixed plate for draft remover; 13. Screen plate for draft remover; 14. Fixed plate for screen; 15. Support rod for screen; 16. Fixed plate 1; 17. Channel; 18. Fixed plate 2; 19. Fixed plate inside vibrating screen; 2 0. External fixing plate of vibrating screen; 21. Bushing; 22. Amplitude adjustment plate; 23. Cam; 24. Screw; 25. Adjustment block; 26. Circlip; 27. Connecting bearing; 28. Eccentric sleeve; 29. ​​Rear axle of vibrating screen; 30. Pulley; 31. Transmission belt; 32. Top block; 33. Guide column; 34. Pressing plate; 35. Reset spring; 36. Electromagnet; 37. Bottom cover; 38. Protective shell; 39. Connecting plate; 40. Vibrator; 41. Material collecting bin; 42. Motor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-6A frequency-adjustable cleaning device for a corn harvester vibrating screen for hilly and mountainous areas comprises a shell 1, a frame 2 is fixedly mounted on the outer wall of the shell 1, an upper fixed plate 8 is fixedly mounted on the outer wall of the frame 2, a corrugated plate 3 is fixedly mounted on the outer wall of the upper fixed plate 8, a motor 42 is fixedly mounted on the outer wall of the frame 2, a pulley 30 is fixedly sleeved on the output shaft of the motor 42, a transmission belt 31 is rollingly connected to the middle of the pulley 30, a vibrating screen rear shaft 29 is fixedly sleeved on the inner wall of the pulley 30, an amplitude adjustment plate 22 is fixedly mounted on the end of the vibrating screen rear shaft 29, an eccentric sleeve 28 is fixedly mounted on the outer wall of the amplitude adjustment plate 22, and a connecting bearing 27 is fixedly sleeved on the inner wall of the eccentric sleeve 28, A cam 23 is inserted into the inner wall of the connecting bearing 27, a screw 24 is placed between the cam 23 and the connecting bearing 27, an adjusting block 25 is threadedly connected to the outer wall of the screw 24, a retaining ring 26 is fixedly installed on the outer wall of the adjusting block 25, an amplitude adjusting plate 22 is tightly fitted on the outer wall of the cam 23, a shaft sleeve 21 is provided on the outer wall of the amplitude adjusting plate 22, a vibration screen outer fixing plate 20 is tightly fitted on the outer wall of the shaft sleeve 21, a vibration screen outer fixing plate 20 is fixedly installed on the outer wall of the vibration screen inner fixing plate 19, a primary screen 4 is provided on the left side of the corrugated plate 3, an upper mounting plate 6 for fish scale screen and a lower mounting plate 7 for fish scale screen are fixedly installed on the outer wall of the frame 2, the upper mounting plate 6 for fish scale screen and the lower mounting plate 7 for fish scale screen are fixedly installed on the outer wall of the frame 2 The outer wall of the lower mounting plate 7 of the screen is rotatably connected with the fish scale screen 5, the outer wall of the fish scale screen 5 is fixedly equipped with a screen support rod 15, the outer wall of the screen support rod 15 is fixedly equipped with a screen fixing plate 14, the outer wall of the screen fixing plate 14 is rotatably connected with the draft remover fixing plate 12, the outer wall of the draft remover fixing plate 12 is fixedly equipped with the draft remover screen plate 13, the inner wall of the shell 1 is fixedly equipped with a primary screen 4, the inner wall of the shell 1 is slidably connected with a secondary screen 9, the outer wall of the secondary screen 9 is fixedly equipped with a vibrating screen front shaft 10, the outer wall of the frame 2 is also fixedly equipped with a fixing plate 16 and a fixing plate 2 18, and the outer walls of the fixing plate 16 and the fixing plate 2 18 are fixedly equipped Equipped with a groove 17, the inner wall of the groove 17 is rollingly connected with a deep groove ball bearing 11, the outer wall of the motor 42 is fixedly equipped with a protective shell 38, the inner wall of the protective shell 38 is fixedly equipped with a top block 32, the inner wall of the top block 32 is slidably connected with a guide column 33, the outer wall of the guide column 33 is fixedly equipped with a pressing plate 34, the bottom of the pressing plate 34 is abutted with a return spring 35, the top of the protective shell 38 is fixedly equipped with an electromagnet 36, the outer wall of the electromagnet 36 is fixedly sleeved with a bottom cover 37, the outer wall of the bottom cover 37 is sleeved with the electromagnet 36, the inner wall of the outer shell 1 is slidably connected with a connecting plate 39, the top of the connecting plate 39 is fixedly equipped with an exciter 40, and the outer wall of the frame 2 is fixedly equipped with a receiving bin 41.

[0023] In the above structure, by setting the shell 1, frame 2, corrugated plate 3, primary screen 4, secondary screen 9, vibrating screen front axle 10, amplitude adjustment plate 22, vibrator 40, and motor 42 structure, during the operation of the device, the user can adjust the operating frequency of the vibrator 40 to change the vibration frequency of the secondary screen 9, thereby reducing the accumulation of materials on the secondary screen 9 when the machine is operating in a steep mountain, thereby improving the adaptability of the cleaning device to different inclination angles and the smoothness of the cleaning process.

[0024] In a preferred embodiment: the connecting bearing 27 is fixedly connected to the screw 24 through the inner fixing plate 19 of the vibrating screen, the outer fixing plate 20 of the vibrating screen, the bushing 21, the number of the connecting bearings 27 is two, and the two connecting bearings 27 are symmetrically distributed along the outer wall of the rear shaft 29 of the vibrating screen.

[0025] In the above structure, by setting up two connecting bearings 27 structures, the connecting bearings 27 can fix the rear shaft 29 of the vibrating screen during the operation of the device, thereby ensuring that the connection points on both sides of the secondary screen 9 have the characteristic of rotation and drive the secondary screen 9 to slide, thereby achieving the effect of receiving the corn and performing secondary cleaning, thereby improving the cleaning effect of the device on corn.

[0026] In a preferred embodiment, the output shaft of the vibrator 40 is fixedly assembled with the bottom of the secondary screen 9 , and the secondary screen 9 is located directly above the material receiving bin 41 .

[0027] In the above structure, by setting the vibrator 40 and the secondary screen 9 structure, when the vibrator 40 is in operation, it can drive the secondary screen 9 to vibrate, so that the user can adjust the operating frequency of the vibrator 40 to improve the effect of the device on corn cleaning. At the same time, the screening of the secondary screen 9 can ensure that the corn collected in the collecting bin 41 is of higher quality, thereby improving the quality of corn produced by the user and further improving the use value of the device.

[0028] In a preferred embodiment, there are two pulleys 30 , and the two pulleys 30 are connected in transmission via a transmission belt 31 .

[0029] In the above structure, through the transmission belt 31 structure, when the motor 42 is working, it can drive one pulley 30 to rotate, and the transmission belt 31 can transmit power to the other pulley 30, thereby ensuring the synchronous rotation of the two pulleys 30, thereby improving the energy utilization rate of the device.

[0030] In a preferred embodiment: the fish scale sieve upper mounting plate 6 is made of galvanized iron metal, the number of sieve fixing plates 14 is several, and the several sieve fixing plates 14 are evenly distributed along the outer wall of the fish scale sieve 5 .

[0031] In the above structure, by setting up a plurality of screen fixing plates 14, the corn can contact the screen fixing plates 14 after falling and be separated from impurities, thereby preventing the impurities from entering the collecting bin 41 together with the corn, further improving the cleaning effect of the device on corn.

[0032] In a preferred embodiment, a controller is fixedly mounted on the outer wall of the housing 1 , and the controller is electrically connected to the vibrator 40 , the motor 42 , and the electromagnet 36 , respectively.

[0033] In the above structure, through the controller structure, the user can control the various accessories in the device to operate according to his own needs, thereby ensuring that when the device is used in an area with steep terrain, the user can quickly adjust the operating state and vibration frequency of the secondary screen 9, thereby facilitating the user to harvest corn on inclined terrain.

[0034] Working principle: After the device is assembled, the motor 42 provides rotational force to the rear shaft 29 of the vibrating screen through the pulley 30 and the transmission belt 31. Due to the eccentric action of the cam 23, the eccentric sleeve 28 is connected to the entire vibrating screen device, and the front shaft 10 of the vibrating screen and the connected deep groove ball bearing 11 move along the inner wall of the groove 17, thereby driving the entire corn cleaning device to perform inclined reciprocating vibration, and the screen fixing plate 14 and the screen support rod 15 are welded together on the fish scale screen 5, and the two ends of the screen support rod 15 are respectively connected to the fish scale screen 5. The holes on the fish scale sieve upper mounting plate 6 and the holes on the fish scale sieve lower mounting plate 7 are hingedly connected, so that the whole row of fish scale sieves 5 and the fish scale sieve upper mounting plate 6 and the fish scale sieve lower mounting plate 7 form a parallelogram mechanism. By pulling the fish scale sieve lower mounting plate 7 to slide left or right, the opening size of all the fish scale sieves 5 can be adjusted. At this time, since the draft sieve plate 13 is installed on the draft walker fixing plate 12 by bolts, the draft walker fixing plate 12 and the fish scale sieve upper mounting plate 6 are connected by bolts. Then, the inclination angle of the entire draft-moving screen plate 13 can be changed by changing the position of the end of the bolt on the inner wall of the mounting plate 6 on the fish scale screen, the screw 24 is screwed into the cam 23 and the adjusting block 25 through a thread, and is fixed by a retaining ring 26 at the tail end of the screw 24, and the relative distance between the center point of the rear shaft 29 of the vibrating screen and the center point of the cam 23 can be changed by changing the length of the screw 24 screwed into the adjusting block 25 and adjusting the position of the amplitude adjusting plate 22 on the cam 23 up and down, thereby changing the amplitude of the cam 23. The pushing distance can adjust the amplitude of the whole device, and the vibration frequency can be adjusted by changing the rotation speed of the motor 42. All the vibrators 40 are installed at the lower end of the secondary screen 9, and the top of the vibrator 40 is in contact with the bottom of the secondary screen 9. When the electromagnet 36 is energized, the top block 32 moves up and down along the guide column 33, and the top of the top block 32 continuously hits the secondary screen 9, so that the secondary screen 9 forms an effect of variable vibration frequency, and continuously disperses the materials accumulated on the secondary screen 9, thereby improving the cleaning quality of the device for corn.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corn harvester with adjustable frequency vibrating screen for hilly and mountainous areas, comprising a housing (1), characterized in that: The outer wall of the housing (1) is fixedly mounted with a frame (2), the outer wall of the frame (2) is fixedly mounted with an upper fixed plate (8), the outer wall of the upper fixed plate (8) is fixedly mounted with a corrugated plate (3), the outer wall of the frame (2) is fixedly mounted with a motor (42), the output shaft of the motor (42) is fixedly sleeved with a pulley (30), the middle part of the pulley (30) is rollingly connected with a transmission belt (31), the inner wall of the pulley (30) is fixedly sleeved with a vibrating screen rear shaft (29), the end of the vibrating screen rear shaft (29) is fixedly mounted with an amplitude adjustment plate (22), the outer wall of the amplitude adjustment plate (22) is fixedly mounted with an eccentric sleeve (28), the inner wall of the eccentric sleeve (28) is fixedly sleeved with a connecting bearing (27), The inner wall of the connecting bearing (27) is plugged with a cam (23), a screw (24) is placed between the cam (23) and the connecting bearing (27), the outer wall of the screw (24) is threadedly connected with an adjusting block (25), the outer wall of the adjusting block (25) is fixedly equipped with a retaining ring (26), the outer wall of the cam (23) is tightly fitted with an amplitude adjusting plate (22), the outer wall of the amplitude adjusting plate (22) is provided with a shaft sleeve (21), the outer wall of the shaft sleeve (21) is tightly fitted with a vibration screen outer fixing plate (20), the outer wall of the vibration screen outer fixing plate (20) is fixedly equipped with a vibration screen inner fixing plate (19), a primary screen (4) is provided on the left side of the corrugated plate (3), and the outer wall of the frame (2) is respectively fixedly equipped with fish The fish scale sieve upper mounting plate (6) and the fish scale sieve lower mounting plate (7) are both rotatably connected to the outer walls of the fish scale sieve upper mounting plate (6) and the fish scale sieve lower mounting plate (7) with the fish scale sieve (5), the outer wall of the fish scale sieve (5) is fixedly equipped with a sieve support rod (15), the outer wall of the sieve support rod (15) is fixedly equipped with a sieve fixing plate (14), the outer wall of the sieve fixing plate (14) is rotatably connected to a draft remover fixing plate (12), the outer wall of the draft remover fixing plate (12) is fixedly equipped with a draft remover sieve plate (13), the inner wall of the housing (1) is fixedly equipped with a primary sieve (4), the inner wall of the housing (1) is slidably connected with a secondary sieve (9), the outer wall of the secondary sieve (9) is fixedly equipped with a vibration The front shaft (10) of the moving screen, the outer wall of the frame (2) is also fixedly equipped with a fixing plate 1 (16) and a fixing plate 2 (18), the outer walls of the fixing plate 1 (16) and the fixing plate 2 (18) are both fixedly equipped with a groove (17), the inner wall of the groove (17) is rollingly connected with a deep groove ball bearing (11), the outer wall of the motor (42) is fixedly equipped with a protective shell (38), the inner wall of the protective shell (38) is fixedly equipped with a top block (32), the inner wall of the top block (32) is slidably connected with a guide column (33), the outer wall of the guide column (33) is fixedly equipped with a pressing plate (34), the bottom of the pressing plate (34) is in contact with a reset spring (35), and the top of the protective shell (38) is fixedly equipped with an electromagnet (36),The outer wall of the electromagnet (36) is fixedly sleeved with a bottom cover (37), the outer wall of the bottom cover (37) is sleeved with the electromagnet (36), the inner wall of the housing (1) is slidably connected with a connecting plate (39), the top of the connecting plate (39) is fixedly equipped with an exciter (40), and the outer wall of the frame (2) is fixedly equipped with a material receiving bin (41).

2. The cleaning device with adjustable frequency of the vibrating screen of the corn harvester in hilly and mountainous areas according to claim 1 is characterized in that: The connecting bearing (27) is fixedly connected to the screw rod (24) through the inner fixing plate (19) of the vibrating screen, the outer fixing plate (20) of the vibrating screen, and the shaft sleeve (21). The number of the connecting bearings (27) is two, and the two connecting bearings (27) are symmetrically distributed along the outer wall of the rear shaft (29) of the vibrating screen.

3. The cleaning device with adjustable frequency of the vibrating screen of the corn harvester in hilly and mountainous areas according to claim 1 is characterized in that: The output shaft of the vibration exciter (40) is fixedly assembled with the bottom of the secondary screen (9), and the secondary screen (9) is located directly above the material receiving bin (41).

4. The cleaning device with adjustable frequency of the vibrating screen of the corn harvester in hilly and mountainous areas according to claim 1 is characterized in that: The number of the pulleys (30) is two, and the two pulleys (30) are connected in transmission via a transmission belt (31).

5. The cleaning device with adjustable frequency of the vibrating screen of the corn harvester in hilly and mountainous areas according to claim 1 is characterized in that: The fish scale sieve upper mounting plate (6) is made of galvanized iron metal, the number of the sieve fixing plates (14) is several, and the several sieve fixing plates (14) are evenly distributed along the outer wall of the fish scale sieve sieve (5).

6. The cleaning device with adjustable frequency of the vibrating screen of the corn harvester in hilly and mountainous areas according to claim 1 is characterized in that: A controller is fixedly mounted on the outer wall of the housing (1), and the controller is electrically connected to the vibrator (40), the motor (42), and the electromagnet (36) respectively.

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