Self-propelled corn harvester and corn harvesting method for hilly terrain

Abstract

The invention discloses a self-propelled corn harvester and a corn harvesting method for hilly terrain, which relates to the field of corn harvesters, including a threshing barrel, a threshing shaft, a main roller, a plurality of auxiliary rollers and an auger filter plate, wherein the threshing shaft is rotatably connected to the threshing barrel, both ends of the threshing shaft are equipped with central gears, the main roller and the plurality of auxiliary rollers are arranged inside the threshing barrel, the main roller is fixedly installed in the middle of the threshing shaft, both ends of the plurality of auxiliary rollers are equipped with planetary gears, both ends of the threshing barrel are equipped with internal toothed rings, and each of the planetary gears is meshed with the corresponding central gear and internal toothed ring; both ends of the threshing barrel are equipped with baffles, the auger filter plate is arranged inside the threshing barrel, and the auger filter plate is evenly provided with a plurality of transverse sieve holes. The invention can peel and thresh corn through the overall structural setting, and can discharge corn husks from the threshing barrel to prevent the corn husks from affecting the corn threshing process.

Description

Technical Field

[0001] The invention relates to the field of corn harvesters, and in particular to a self-propelled corn harvester and a corn harvesting method for hilly terrain. Background Art

[0002] Corn harvesters are agricultural machinery that mechanically harvest corn stalks when the corn is ripe or nearly ripe according to agronomic requirements. The main working structures of existing corn harvesters include a header, a conveyor, and a thresher. The header is used to separate and collect corn from the stalks, the conveyor is used to transport the collected corn to the thresher, and the thresher is used to peel the corn and separate the corn kernels.

[0003] There are two main threshing methods for the thresher on the existing corn harvester. One is to separate the peeling structure. After the corn is peeled by a special peeling machine, the thresher separates the corn kernels from the corn cob. This method requires a separate peeling machine, which not only increases the overall structure and weight of the harvester, but also makes the threshing process more complicated and reduces the efficiency. The other is to thresh the corn with a peeling and threshing integrated machine. However, since the undried corn husk has strong toughness, it is not easy to break it using a general crushing method. The corn husk will exist in the thresher for a long time. As the corn husk accumulates more and more in the thresher, it is easy to affect the normal operation of the thresher. Summary of the invention

[0004] The purpose of the present application is to provide a self-propelled corn harvester, in which a main roller is fixed on a threshing shaft, a plurality of auxiliary rollers are arranged around the main roller, a central gear and a baffle are installed on the threshing shaft, a planetary gear is installed on the auxiliary roller, an inner toothed ring is installed in the threshing cylinder, the planetary gear cooperates with the central gear and the inner toothed ring, an auger filter plate is installed on the baffle, the threshing shaft is driven to drive the main roller to rotate, the central gear rotates with the threshing shaft, and the planetary gear, under the joint action of the central gear and the inner toothed ring, revolves around the central gear as the center while rotating on its own, and the rotation direction is opposite to that of the central gear. The roller revolves around the main roller and rotates at the same time to thresh the corn. The corn husks and corn kernels are separated from the corn cobs, and the corn cobs are broken, but the corn husks are not easily broken. The auger filter plate continuously pushes the corn husks to one end of the threshing barrel and is finally discharged from the opening, while the corn kernels pass through the auger filter plate through the horizontal sieve holes and finally fall from the longitudinal sieve holes. Through the overall structural setting, the present invention can peel and thresh the corn at the same time, has a simple structure and high efficiency, and can discharge the corn husks from the threshing barrel to prevent the corn husks from affecting the corn threshing process.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a self-propelled corn harvester, comprising a vehicle body, on which a header, a conveyor and a thresher are installed in sequence from the beginning to the end, the thresher comprising a threshing drum, a threshing shaft, a main roller, a plurality of auxiliary rollers and an auger filter plate, the upper end of the threshing drum is provided with a feed port, the lower end of the threshing drum is provided with an opening and a plurality of longitudinal sieve holes, the threshing shaft passes through the threshing drum, and the threshing shaft is rotatably connected to the threshing drum, central gears are fixedly installed at both ends of the threshing shaft, the main roller and a plurality of auxiliary rollers are arranged inside the threshing drum, and the main roller is fixedly installed on the threshing drum. In the middle part of the shaft, multiple auxiliary rollers are arranged in a ring array around the main roller, planetary gears are fixedly installed at both ends of the multiple auxiliary rollers, internal toothed rings are fixedly installed at both ends of the threshing cylinder, and each of the planetary gears is meshed with the corresponding central gear and the internal toothed ring; baffles are rotatably installed at both ends of the threshing cylinder, two baffles are arranged between two central gears, the auger filter plate is arranged inside the threshing cylinder, and the two ends of the auger filter plate are fixedly connected to the two baffles respectively, the main roller and multiple auxiliary rollers are inserted through the auger filter plate, and the auger filter plate is evenly provided with multiple transverse sieve holes.

[0006] Preferably, the thresher also includes a shell and a collecting bucket, the collecting bucket is fixedly installed at the top of the shell, the threshing barrel is fixedly installed at the middle of the shell, the lower end of the collecting bucket is connected to the feed port, a threshing motor is fixedly installed on one side of the shell, and the output end of the threshing motor is inserted through the shell and fixedly connected to one end of the threshing shaft.

[0007] Preferably, the thresher also includes a screen plate, a debris collection plate, a corn husk discharge plate and a partition, the screen plate, the debris collection plate, the corn husk discharge plate and the partition are all fixedly installed at the bottom of the outer shell, the partition is fixedly connected to the lower end of the threshing drum, the feed port and the longitudinal sieve holes are respectively arranged on both sides of the partition, the screen plate and the corn husk discharge plate are both fixedly connected to the middle of the partition, the debris collection plate is fixedly connected to the bottom of the partition, the screen plate and the debris collection plate are both arranged on the same side of the partition as the longitudinal sieve holes, the screen plate is provided with a plurality of debris sieve holes, and the corn husk discharge plate and the feed port are arranged on the same side of the partition.

[0008] Preferably, the aperture of the transverse sieve hole is the same as the aperture of the longitudinal sieve hole, and the aperture of the slag sieve hole is smaller than the aperture of the transverse sieve hole and the aperture of the longitudinal sieve hole.

[0009] Preferably, the thresher also includes a base plate and a pad, the base plate is fixedly mounted on the vehicle body, a guide rail is fixedly mounted on the upper end of the base plate, the pad is cooperatively mounted on the guide rail, the upper end of the pad is inclined, the outer shell is fixedly mounted on the upper end of the pad, a turntable is rotatably mounted on the upper end of the base plate, an eccentric column is fixedly mounted on the upper end of the turntable, a transmission rod is arranged between the eccentric column and the pad, and both ends of the transmission rod are rotatably connected to the eccentric column and the pad respectively.

[0010] Preferably, the corn husk discharge plate is inclined, the inclination direction of the corn husk discharge plate is opposite to the inclination direction of the upper end of the pad, and the inclination angle of the corn husk discharge plate is greater than the inclination angle of the upper end of the pad.

[0011] Preferably, an upper pulley is fixedly mounted on one end of the threshing shaft, a fan is fixedly mounted on one side of the housing, a lower pulley is fixedly mounted on the driving shaft of the fan, a belt is cooperatedly mounted between the upper pulley and the lower pulley, and the fan is arranged above the screen plate.

[0012] Preferably, a cutting platform adjustment mechanism is provided at the rear end of the cutting platform, and the cutting platform adjustment mechanism includes two mounting frames, two screw rods, two lifting motors, a lifting beam and two cylinders. The two mounting frames are fixedly installed on the front end of the vehicle body, the two screw rods are rotatably installed in the middle of the two mounting frames, and the two lifting motors are fixedly installed on the upper ends of the two mounting frames, respectively. The output end of each lifting motor is fixedly connected to one end of the corresponding screw rod, the two screw rods are respectively inserted through the two ends of the lifting beam, and the two ends of the lifting beam are respectively threadedly matched with the two screw rods, the lower end of the cutting platform is rotatably connected to the lifting beam, the two cylinders are rotatably installed on the upper end of the lifting beam, and the telescopic ends of the two cylinders are rotatably connected to the middle part of the cutting platform.

[0013] Preferably, the front wheels of the vehicle body are triangular track wheels.

[0014] A corn harvesting method for hilly terrain, using the above-mentioned self-propelled corn harvester, comprises the following steps:

[0015] The harvester is driven forward in the corn field, and the header peels the corn off the stalks and transports it to the thresher through the conveyor;

[0016] The harvested corn is put into the threshing drum from the feed port, and the threshing shaft drives the main roller to rotate, threshing the corn, and the corn husk and corn kernels are separated from the corn cob, and the corn cob is broken;

[0017] When multiple auxiliary rollers revolve, they drive the baffle and the auger filter plate to rotate. The auger filter plate continuously pushes the corn husk to one end of the threshing cylinder and finally discharges it from the opening. The corn kernels pass through the horizontal sieve holes of the auger filter plate and finally fall from the vertical sieve holes.

[0018] In summary, the technical effects and advantages of the present invention are as follows:

[0019] 1. In the present invention, the main roller is fixed on the threshing shaft, and a plurality of auxiliary rollers are arranged around the main roller. A central gear and a baffle are installed on the threshing shaft, a planetary gear is installed on the auxiliary roller, an inner toothed ring is installed in the threshing cylinder, the planetary gear cooperates with the central gear and the inner toothed ring, and the auger filter plate is installed on the baffle. The threshing shaft is driven to drive the main roller to rotate, and the central gear rotates with the threshing shaft. Under the joint action of the central gear and the inner toothed ring, the planetary gear revolves around the central gear as the center and rotates at the same time, and the rotation direction is opposite to that of the central gear. The plurality of auxiliary rollers revolve around the main roller as the center. The corn is threshed by rotating while revolving. The corn husks and corn kernels are separated from the corn cobs, and the corn cobs are broken. The corn husks are not easy to be broken. The auger filter plate continuously pushes the corn husks to one end of the threshing cylinder and finally discharges them from the opening. The corn kernels pass through the auger filter plate through the transverse sieve holes and finally fall from the longitudinal sieve holes. Through the overall structural setting, the present invention can simultaneously perform husk peeling and threshing on the corn, has a simple structure and high efficiency, and can discharge the corn husks from the threshing cylinder to prevent the corn husks from affecting the corn threshing process.

[0020] 2. In the present invention, the sieve plate, the debris collecting plate, the corn husk discharging plate and the partition are all fixedly installed on the bottom of the shell, the partition is connected to the lower end of the threshing drum, the feed port and the longitudinal sieve holes are respectively arranged on both sides of the partition, the sieve plate is connected to the middle of one side of the partition, a plurality of debris sieve holes are arranged on the sieve plate, the debris collecting plate is connected to the bottom of one side of the partition, the corn husk discharging plate is connected to the middle of the other side of the partition, a fan is arranged above the sieve plate, after the corn husk is discharged from the opening, it is guided out through the corn husk discharging plate, the corn kernels fall on the sieve plate from the longitudinal sieve holes, the fan blows away the lighter straw debris, the complete corn kernels are guided out through the sieve plate, the corn kernels fall on the debris collecting plate from the debris sieve holes and are discharged, through the above-mentioned structural arrangement, the present invention can discharge the corn husk, the complete corn kernels and the corn kernels separately, so as to facilitate the direct harvest of high-quality corn kernels, and the corn kernels can also be used for making feed and other purposes subsequently, which is highly practical.

[0021] 3. In the present invention, the two mounting frames are fixedly mounted on the front end of the vehicle body, the two screw rods are rotatably mounted on the middle parts of the two mounting frames, the two lifting motors are fixedly mounted on the upper ends of the two mounting frames, the output end of each lifting motor is fixedly connected to one end of the corresponding screw rod, the two screw rods are respectively inserted through the two ends of the lifting beam, and the two ends of the lifting beam are respectively matched with the two screw rod threads, the lower end of the cutting platform is rotatably connected to the lifting beam, the two cylinders are rotatably mounted on the upper end of the lifting beam, and the telescopic ends of the two cylinders are rotatably connected to the middle part of the cutting platform, the lifting motor drives the screw rod to rotate to drive the lifting beam to be lifted and lowered, which is convenient for driving the cutting platform to be lifted and lowered and adjusting the height of the cutting platform, the cylinder can drive the cutting platform to rotate and adjust the angle of the cutting platform, and the setting of the cutting platform adjustment mechanism makes the cutting platform have a higher degree of freedom and can adapt to the use of hilly terrain, and the front wheel of the vehicle body is a triangular crawler wheel, which is convenient for the present invention to move in hilly terrain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cutaway three-dimensional structure of the threshing cylinder of the present invention;

[0025] Figure 3 It is a schematic diagram of the cut-away plan structure of the threshing cylinder of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection structure of the main roller and the auxiliary roller of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the auger filter plate of the present invention;

[0028] Figure 6 It is a schematic diagram of the cutaway structure of the thresher of the present invention;

[0029] Figure 7 It is a schematic diagram of the cross-section structure of the thresher of the present invention from another angle;

[0030] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle;

[0031] Fig. 9 It is a structural schematic diagram of the cutting platform of the present invention.

[0032] In the figure: 1, vehicle body; 2, cutting platform; 201, mounting frame; 202, screw rod; 203, lifting motor; 204, lifting beam; 205, cylinder; 3, conveyor; 4, thresher; 401, shell; 402, collecting bucket; 403, thresher barrel; 4031, feed inlet; 4032, longitudinal sieve hole; 4033, opening; 404, sieve plate; 405, slag collecting plate; 406, corn husk discharge plate; 407, pad; 408, Bottom plate; 409, guide rail; 410, turntable; 411, eccentric column; 412, transmission rod; 413, threshing motor; 414, threshing shaft; 415, main roller; 416, center gear; 417, inner toothed ring; 418, planetary gear; 419, auxiliary roller; 420, auger filter plate; 4201, transverse sieve hole; 421, baffle; 422, upper pulley; 423, fan; 424, lower pulley; 425, belt; 426, partition. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Reference Figure 1-Figure 5A self-propelled corn harvester is shown, comprising a vehicle body 1, on which a header 2, a conveyor 3 and a thresher 4 are installed in sequence from head to tail, and the thresher 4 comprises a threshing drum 403, a threshing shaft 414, a main roller 415, a plurality of auxiliary rollers 419 and an auger filter plate 420, the upper end of the threshing drum 403 is provided with a feed port 4031, the lower end of the threshing drum 403 is provided with an opening 4033 and a plurality of longitudinal sieve holes 4032, the threshing shaft 414 passes through the threshing drum 403, and the threshing shaft 414 is rotatably connected to the threshing drum 403, both ends of the threshing shaft 414 are fixedly installed with a central gear 416, the main roller 415 and the plurality of auxiliary rollers 419 are all arranged inside the threshing drum 403, the main roller 415 is fixedly installed in the middle of the threshing shaft 414, the plurality of auxiliary rollers 419 are arranged around the main roller 415 in a ring array, and the plurality of auxiliary rollers Planetary gears 418 are fixedly installed at both ends of 419, and internal toothed rings 417 are fixedly installed at both ends of the threshing cylinder 403. Each of the planetary gears 418 is meshed with the corresponding central gear 416 and the internal toothed ring 417, and the harvested corn is put into the threshing cylinder 403 from the feed port 4031, and the threshing shaft 414 is driven to drive the main roller 415 to rotate, and the central gear 416 rotates with the threshing shaft 414. Under the joint action of the central gear 416 and the internal toothed ring 417, the planetary gears 418 revolve around the central gear 416 and rotate at the same time, and the rotation direction is opposite to that of the central gear 416. Multiple auxiliary rollers 419 revolve around the main roller 415 and rotate at the same time to thresh the corn. The corn husks and corn kernels are separated from the corn cobs, and the corn cobs are broken. Through the arrangement of the above structure, the corn threshing process is made more efficient. Baffles 421 are rotatably installed at both ends of the threshing cylinder 403, the auger filter plate 420 is arranged inside the threshing cylinder 403, and the two ends of the auger filter plate 420 are fixedly connected to the two baffles 421 respectively, the main roller 415 and multiple auxiliary rollers 419 are inserted through the auger filter plate 420, and the auger filter plate 420 is evenly provided with multiple transverse sieve holes 4201. During the threshing process, the auger filter plate 420 continuously pushes the corn husks toward one end of the threshing cylinder 403, and finally discharges them from the opening 4033. The corn kernels pass through the auger filter plate 420 through the transverse sieve holes 4201, and finally fall from the longitudinal sieve holes 4032, so as to prevent the corn husks from affecting the corn threshing process.

[0035] Embodiment 2 is different from the above embodiment in that Figure 6-Figure 8As shown, the thresher 4 also includes a shell 401 and a collecting bucket 402, the collecting bucket 402 is fixedly installed on the top of the shell 401, the threshing barrel 403 is fixedly installed in the middle of the shell 401, the lower end of the collecting bucket 402 is connected with the feed port 4031, a threshing motor 413 is fixedly installed on one side of the shell 401, the output end of the threshing motor 413 is inserted through the shell 401 and fixedly connected with one end of the threshing shaft 414, the corn falls into the collecting bucket 402 after being transported by the conveyor 3, and then enters the threshing barrel 403 through the feed port 4031, which facilitates the feeding process.

[0036] Embodiment 3 is different from the above embodiments in that the thresher 4 further includes a sieve plate 404, a debris collecting plate 405, a corn husk discharging plate 406 and a partition 426, the sieve plate 404, the debris collecting plate 405, the corn husk discharging plate 406 and the partition 426 are all fixedly installed at the bottom of the shell 401, the partition 426 is fixedly connected to the lower end of the threshing cylinder 403, the feed inlet 4031 and the longitudinal sieve hole 4032 are respectively arranged on both sides of the partition 426, the sieve plate 404 is fixedly connected to the middle part of one side of the partition 426, a plurality of debris sieve holes are provided on the sieve plate 404, the debris collecting plate 405 is fixedly connected to the bottom of one side of the partition 426, the corn husk discharging plate 406 is fixedly connected to the middle part of the other side of the partition 426, the aperture of the transverse screen hole 4201 is the same as the aperture of the longitudinal screen hole 4032, and the aperture of the crushing sieve hole is smaller than the aperture of the transverse screen hole 4201 and the aperture of the longitudinal screen hole 4032. After the corn husk is discharged from the opening 4033, it is exported through the corn husk discharge plate 406, and the corn kernels fall on the screen plate 404 from the longitudinal screen hole 4032. The whole corn kernels are exported through the screen plate 404, and the corn crushed kernels fall on the crushed collecting plate 405 from the crushing screen hole and are discharged. The present invention can discharge the corn husk, the whole corn kernels and the corn crushed kernels separately, which is convenient for directly harvesting high-quality corn kernels. The corn crushed kernels can also be used for making feed and other purposes later, and are highly practical.

[0037] Embodiment 4 is different from the above embodiments in that the thresher 4 further comprises a bottom plate 408 and a pad 407, the bottom plate 408 is fixedly mounted on the vehicle body 1, a guide rail 409 is fixedly mounted on the upper end of the bottom plate 408, the pad 407 is cooperatively mounted on the guide rail 409, the upper end of the pad 407 is tilted, the housing 401 is fixedly mounted on the upper end of the pad 407, a turntable 410 is rotatably mounted on the upper end of the bottom plate 408, an eccentric column 411 is fixedly mounted on the upper end of the turntable 410, a transmission rod 412 is arranged between the eccentric column 411 and the pad 407, and the transmission rod 412 The two ends are rotatably connected with the eccentric column 411 and the pad 407 respectively. Due to the setting of the pad 407, the shell 401 is installed tilted, and the threshing cylinder 403, the screen plate 404 and the debris collecting plate 405 are all tilted to one side, driving the turntable 410 to rotate. The turntable 410 drives the shell 401 to move back and forth through the transmission rod 412, which can promote the corn kernels to pass through the horizontal screen holes 4201 to move to one side of the threshing cylinder 403, and finally pass through the longitudinal screen holes 4032 and fall on the screen plate 404, completing the screening of the corn kernels. The screen plate 404 also reciprocates to screen out the corn kernels, and discharges and collects them through the debris collecting plate 405.

[0038] The corn husk discharge plate 406 is tilted, and the tilt direction of the corn husk discharge plate 406 is opposite to the tilt direction of the upper end of the pad 407. The tilt angle of the corn husk discharge plate 406 is greater than the tilt angle of the upper end of the pad 407. When the outer shell 401 is tilted as a whole, the corn husk discharge plate 406 is ensured to be tilted in the opposite direction to the outer shell 401, which is convenient for discharging the corn husks.

[0039] Embodiment 5 differs from the above embodiments in that an upper pulley 422 is fixedly mounted on one end of the threshing shaft 414, a fan 423 is fixedly mounted on one side of the housing 401, a lower pulley 424 is fixedly mounted on the driving shaft of the fan 423, a belt 425 is cooperatedly mounted between the upper pulley 422 and the lower pulley 424, and the fan 423 is arranged above the screen plate 404. The fan 423 is used to blow away the lighter straw particles in the corn kernels to avoid impurities being mixed into the corn kernels.

[0040] Embodiment 6 is different from the above embodiments in that Fig. 9As shown, a cutting platform adjustment mechanism is provided at the rear end of the cutting platform 2, and the cutting platform adjustment mechanism includes two mounting frames 201, two screw rods 202, two lifting motors 203, a lifting beam 204 and two cylinders 205. The two mounting frames 201 are fixedly installed at the front end of the vehicle body 1, and the two screw rods 202 are respectively rotatably installed in the middle of the two mounting frames 201. The two lifting motors 203 are respectively fixedly installed at the upper ends of the two mounting frames 201, and the output end of each lifting motor 203 is fixedly connected to one end of the corresponding screw rod 202. The two screw rods 202 are respectively inserted through the two ends of the lifting beam 204, and the The two ends of the lifting beam 204 are respectively threadedly matched with the two screw rods 202, the lower end of the cutting platform 2 is rotatably connected to the lifting beam 204, the two cylinders 205 are rotatably installed on the upper end of the lifting beam 204, and the telescopic ends of the two cylinders 205 are rotatably connected to the middle part of the cutting platform 2. The lifting motor 203 is used to drive the screw rod 202 to rotate, and the lifting beam 204 can be driven to rise and fall, which is convenient for driving the cutting platform 2 to rise and fall and adjust the height of the cutting platform 2. The cylinder 205 can be used to drive the cutting platform 2 to rotate and adjust the angle of the cutting platform 2. The setting of the cutting platform adjustment mechanism allows the cutting platform 2 to have a higher degree of freedom and to adapt to the use in hilly terrain.

[0041] Preferably, the front wheels of the vehicle body 1 are triangular track wheels, which facilitate the vehicle body to move on hilly terrain.

[0042] A corn harvesting method for hilly terrain, using the above-mentioned self-propelled corn harvester, comprises the following steps:

[0043] The harvester is driven forward in the corn field, and the cutting table 2 peels the corn from the stalks and conveys the corn to the thresher 4 through the conveyor 3;

[0044] The harvested corn is put into the threshing drum 403 from the feed port 4031, and the threshing shaft 414 is driven to drive the main roller 415 to rotate, so that the corn is threshed, the corn husk and corn kernels are separated from the corn cob, and the corn cob is broken;

[0045] When multiple auxiliary rollers 419 revolve, they drive the baffle 421 and the auger filter plate 420 to rotate. The auger filter plate 420 continuously pushes the corn husks toward one end of the threshing barrel 403, and finally discharges them from the opening 4033. The corn kernels pass through the transverse sieve holes 4201 through the auger filter plate 420, and finally fall from the longitudinal sieve holes 4032.

[0046] Working principle:

[0047] The vehicle body 1 is driven to move forward, and the lifting motor 203 is used to drive the screw rod 202 to rotate, which can drive the lifting beam 204 to move up and down, so as to facilitate the lifting and lowering of the cutting platform 2, and adjust the height of the cutting platform 2. The cylinder 205 can be used to drive the cutting platform 2 to rotate, adjust the angle of the cutting platform 2, and adjust the cutting platform 2 in real time according to the terrain. The cutting platform 2 peels the corn from the straw and transports it to the collecting bucket 402 through the conveyor 3;

[0048] The corn is put into the threshing drum 403 from the feeding port 4031 through the collecting bucket 402, and the threshing shaft 414 is driven to drive the main roller 415 to rotate, and the central gear 416 rotates with the threshing shaft 414. Under the joint action of the central gear 416 and the inner toothed ring 417, the planetary gear 418 revolves around the central gear 416 and rotates on its own, and the rotation direction is opposite to the rotation direction of the central gear 416. The multiple auxiliary rollers 419 revolve around the main roller 415 and rotate on their own, and the corn is threshed. The corn husk and corn kernels are separated from the corn cob, and the corn cob is broken.

[0049] When the multiple auxiliary rollers 419 revolve, the baffle plate 421 and the auger filter plate 420 are driven to rotate. The auger filter plate 420 continuously pushes the corn husks toward one end of the threshing cylinder 403, and finally discharges them from the opening 4033. At the same time, the turntable 410 is driven to rotate. The turntable 410 drives the outer shell 401 to move back and forth through the transmission rod 412. The corn kernels pass through the transverse sieve holes 4201 through the auger filter plate 420 and finally fall from the longitudinal sieve holes 4032.

[0050] After the corn husk is discharged from the opening 4033, it is output through the corn husk discharge plate 406, and the corn kernels fall onto the sieve plate 404 from the longitudinal sieve holes 4032. The fan 423 blows away the lighter straw debris, and the complete corn kernels are output through the sieve plate 404. The corn debris falls onto the debris collection plate 405 from the debris sieve holes and is discharged.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-propelled corn harvester, comprising a vehicle body, wherein a header, a conveyor and a thresher are sequentially mounted on the vehicle body from the beginning to the end, characterized in that: The threshing machine comprises a threshing drum, a threshing shaft, a main roller, a plurality of auxiliary rollers, an auger filter plate, a shell, a collecting bucket, a screen plate, a debris collecting plate, a corn husk discharge plate, a partition, a bottom plate and a pad. The upper end of the threshing drum is provided with a feed port, the lower end of the threshing drum is provided with an opening and a plurality of longitudinal sieve holes, the threshing shaft passes through the threshing drum, and the threshing shaft is rotatably connected to the threshing drum, both ends of the threshing shaft are fixedly installed with a central gear, the main roller and the plurality of auxiliary rollers are both arranged inside the threshing drum, the main roller is fixedly installed at the middle part of the threshing shaft, the plurality of auxiliary rollers are arranged around the main roller in a ring array, both ends of the plurality of auxiliary rollers are fixedly installed with planetary gears, both ends of the inside of the threshing drum are fixedly installed with an inner toothed ring, and each of the planetary gears is meshed with the corresponding central gear and the inner toothed ring; Baffles are rotatably installed at both ends of the threshing cylinder, and the two baffles are arranged between the two central gears. The auger filter plate is arranged inside the threshing cylinder, and the two ends of the auger filter plate are respectively fixedly connected to the two baffles. The main roller and the plurality of auxiliary rollers are all inserted through the auger filter plate, and the auger filter plate is evenly provided with a plurality of transverse sieve holes; The collecting hopper is fixedly installed at the top of the shell, the threshing drum is fixedly installed at the middle of the shell, the lower end of the collecting hopper is connected with the feed port, a threshing motor is fixedly installed on one side of the shell, and the output end of the threshing motor is inserted through the shell and fixedly connected with one end of the threshing shaft; The sieve plate, the debris collection plate, the corn husk discharge plate and the partition are all fixedly installed at the bottom of the shell, the partition is fixedly connected to the lower end of the threshing cylinder, the feed port and the longitudinal sieve hole are respectively arranged on both sides of the partition, the sieve plate and the corn husk discharge plate are both fixedly connected to the middle of the partition, the debris collection plate is fixedly connected to the bottom of the partition, the sieve plate and the debris collection plate are both arranged on the same side of the partition as the longitudinal sieve hole, the sieve plate is provided with a plurality of debris sieve holes, and the corn husk discharge plate and the feed port are arranged on the same side of the partition; The base plate is fixedly mounted on the vehicle body, a guide rail is fixedly mounted on the upper end of the base plate, the pad is cooperatively mounted on the guide rail, the upper end of the pad is inclined, the outer shell is fixedly mounted on the upper end of the pad, a turntable is rotatably mounted on the upper end of the base plate, an eccentric column is fixedly mounted on the upper end of the turntable, a transmission rod is arranged between the eccentric column and the pad, and both ends of the transmission rod are rotatably connected to the eccentric column and the pad respectively.

2. A self-propelled corn harvester according to claim 1, characterized in that: The aperture of the transverse sieve hole is the same as the aperture of the longitudinal sieve hole, and the aperture of the slag sieve hole is smaller than the aperture of the transverse sieve hole and the aperture of the longitudinal sieve hole.

3. The self-propelled corn harvester according to claim 1, characterized in that: The corn husk discharging plate is tilted, the tilting direction of the corn husk discharging plate is opposite to the tilting direction of the upper end of the pad, and the tilting angle of the corn husk discharging plate is greater than the tilting angle of the upper end of the pad.

4. The self-propelled corn harvester according to claim 1, characterized in that: An upper pulley is fixedly mounted on one end of the threshing shaft, a fan is fixedly mounted on one side of the shell, a lower pulley is fixedly mounted on the driving shaft of the fan, a belt is matched and mounted between the upper pulley and the lower pulley, and the fan is arranged above the screen plate.

5. The self-propelled corn harvester according to claim 1, characterized in that: A cutting platform adjustment mechanism is provided at the rear end of the cutting platform, and the cutting platform adjustment mechanism includes two mounting frames, two screw rods, two lifting motors, a lifting beam and two cylinders. The two mounting frames are fixedly mounted on the front end of the vehicle body, the two screw rods are rotatably mounted on the middle parts of the two mounting frames, and the two lifting motors are fixedly mounted on the upper ends of the two mounting frames, respectively. The output end of each lifting motor is fixedly connected to one end of the corresponding screw rod, the two screw rods are respectively inserted through the two ends of the lifting beam, and the two ends of the lifting beam are respectively matched with the two screw rod threads, the lower end of the cutting platform is rotatably connected to the lifting beam, the two cylinders are rotatably mounted on the upper end of the lifting beam, and the telescopic ends of the two cylinders are rotatably connected to the middle part of the cutting platform.

6. The self-propelled corn harvester according to claim 1, characterized in that: The front wheels of the vehicle body are triangular track wheels.

7. A method for harvesting corn in hilly terrain, using a self-propelled corn harvester as claimed in any one of claims 1 to 6, comprising the following steps: The harvester is driven forward in the corn field, and the header peels the corn off the stalks and transports it to the thresher through the conveyor; The harvested corn is put into the threshing drum from the feed port, and the threshing shaft drives the main roller to rotate, threshing the corn, and the corn husk and corn kernels are separated from the corn cob, and the corn cob is broken; When multiple auxiliary rollers revolve, they drive the baffle and the auger filter plate to rotate. The auger filter plate continuously pushes the corn husk to one end of the threshing cylinder and finally discharges it from the opening. The corn kernels pass through the horizontal sieve holes of the auger filter plate and finally fall from the vertical sieve holes.

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