阅读说明：本技术 谷子脱粒滚筒及谷子联合收获机 (Millet threshing cylinder and millet combined harvester ) 是由 顾旭彪 刘军民 闫一东 唐竹 李鹏飞 朱坤 于 2021-03-18 设计创作，主要内容包括：本发明公开了一种谷子脱粒滚筒,涉及农业机械设备技术领域,谷子脱粒滚筒包括后滚筒本体、多个板齿和多个齿杆,所述后滚筒本体上沿远离进料口的方向依次包括相连接的脱粒段和粉碎段,多个所述板齿在所述脱粒段的外侧面上沿所述后滚筒本体的周向并排间隔固定设置,多个所述齿杆在所述粉碎段的外侧面上均匀分布,多个所述齿杆均与所述后滚筒本体的外侧面上接触的表面呈角度设置；本发明还公开了一种谷子联合收获机,谷子联合收获机包括上述的谷子脱粒滚筒以及位于所述脱粒滚筒上方的顶盖和位于所述脱粒滚筒下方的格栅凹板,能够降低谷子的夹带损失率、含杂率以及秸秆对脱粒滚筒的堵塞频率。(The invention discloses a millet threshing cylinder, which relates to the technical field of agricultural mechanical equipment, and comprises a rear cylinder body, a plurality of plate teeth and a plurality of tooth bars, wherein the rear cylinder body sequentially comprises a threshing section and a crushing section which are connected along the direction far away from a feed inlet; the invention also discloses a millet combined harvester which comprises the millet threshing cylinder, a top cover positioned above the threshing cylinder and a grid concave plate positioned below the threshing cylinder, and can reduce the entrainment loss rate and impurity content of millet and the blocking frequency of straws to the threshing cylinder.)

1. A cereal threshing cylinder characterized in that: the method comprises the following steps: rear cylinder body, a plurality of board tooth and a plurality of ratch, include the section of threshing and the crushing section that is connected in proper order along the direction of keeping away from the feed inlet on the rear cylinder body, it is a plurality of the board tooth is in follow on the lateral surface of the section of threshing the circumference of rear cylinder body is fixed the setting at interval side by side, and is a plurality of the ratch is in evenly distributed on the lateral surface of crushing section, it is a plurality of the ratch all with the surface of contact is the angle setting on the lateral surface of rear cylinder body.

2. The cereal threshing cylinder according to claim 1, characterized in that: the ratio of the length of the threshing section to the length of the crushing section is 0.8-1.2.

3. The cereal threshing cylinder according to claim 1, characterized in that: the threshing device is characterized by further comprising a front feeding barrel, the axis of the front feeding barrel is overlapped with the axis of the rear roller body, the front feeding barrel is fixedly connected with one end, far away from the crushing section, of the rear roller body, and the front feeding barrel is used for conveying non-threshed plants to the rear roller direction.

4. The cereal threshing cylinder according to claim 1, characterized in that: the rear roller body comprises a roller shaft, a plurality of amplitude discs and a plurality of threshing toothed bars, the amplitude discs are arranged on the roller shaft along the roller shaft in an axially uniform interval mode and are arranged in a plurality of mode, the threshing toothed bars are arranged in the circumferential direction of the rear roller side by side in an interval mode and are arranged in a plurality of mode, the threshing toothed bars are fixedly connected with the amplitude discs in an equal mode, and each threshing toothed bar is evenly provided with one plate tooth and a plurality of toothed bars in a fixed connection mode.

5. The cereal threshing cylinder according to claim 3, wherein: the front feed cylinder is a closed conical cylinder, the large end of the closed conical cylinder is fixedly connected with the rear roller body, a plurality of helical blades are arranged on the side surface of the closed conical cylinder along the circumferential direction of the closed conical cylinder, and the helical blades can convey unscranulated plants to the rear roller direction along with the rotation of the closed conical cylinder.

6. The cereal threshing cylinder according to claim 5, wherein: the plate tooth is a rasp bar plate tooth, the rack bar is a spike tooth, and the number of the helical blades is 2-3.

7. A millet combine harvester is characterized in that: the method comprises the following steps: chassis walking portion is in with fixed setting header, feeding conveying part, driver's cabin, threshing separation portion, cereal cleaning part, seed grain collection auger, seed grain lifting conveyor, crushing row grass portion, granary, unload grain portion and fan on the chassis walking portion, the place ahead of chassis walking portion is provided with the header, the front portion top of chassis walking portion is provided with feeding conveying part and driver's cabin, the driver's cabin is located the top of feeding conveying part, the middle part top of chassis walking portion is by supreme fixed setting in proper order down the seed grain collection auger the cereal cleaning part threshing separation portion with the granary, the rear portion output of header with the front end fixed connection and the intercommunication of feeding conveying part, the rear end of feeding conveying part with threshing separation portion articulates and the intercommunication, threshing separation portion includes according to any one in claim 1 ~ 6 the millet cylinder and is located threshing cylinder is last The top cap of side with be located threshing cylinder below grid concave, the top cap with the grid concave surrounds threshing cylinder's lateral surface, and all with chassis walking fixed connection, smash row's grass portion fixed the setting in threshing separation portion with the rear of cereal cleaning portion, and all with threshing separation portion's afterbody with the afterbody intercommunication of cereal cleaning portion, the fan is fixed to be set up smash the top of arranging grass portion, just the air outlet setting of fan is in the place ahead of cereal cleaning portion, cereal cleaning portion can be to following the mixed cereal that spills in the threshing separation portion carries out the vibration screening, and the millet falls into from cereal cleaning portion the kernel collects in the screw feeder, and impurity gets into under the vibration effect of the kernel of fan and cereal screening portion outside the discharge machine behind the crushing row's grass portion, the lower extreme of elevator with the collection screw feeder links to each other, the upper end of the grain elevator is connected with the granary, the grain unloading part is fixed on the granary, one end of the grain unloading part extends into the granary and is close to the bottom of the granary, and the other end of the grain unloading part is used for extending into the granary or forming a channel for conveying grains in a transport vehicle.

8. The combine harvester of claim 7, wherein: grid concave board includes a plurality of be located threshing section concave board and a plurality of be located threshing section below smash the section below crushing section concave board, a plurality of threshing section concave board and a plurality of crushing section concave board is equallyd divide and do not includes a plurality of baffles and a plurality of billet, and is a plurality of the baffle is fan ring shaped board, and is a plurality of threshing cylinder's lower part is followed threshing cylinder's rotation axis direction sets up at the interval side by side, and is a plurality of the billet is in threshing cylinder's lower part is followed threshing cylinder's circumference sets up at the interval side by side, just the billet with baffle fixed connection, a plurality of threshing section concave board and a plurality of crushing section concave board is all in threshing cylinder's below is followed threshing cylinder's axial sets up side by side.

9. The combine harvester of claim 8, wherein: a plurality of thresh adjacent two on the section concave plate the distance of billet is followed and is close to the direction of crushing section reduces gradually, each thresh adjacent two on the section concave plate the distance of billet is 5 ~ 11mm, a plurality of thresh on the section concave plate the billet with the distance of board tooth is followed and is close to the direction of crushing section reduces gradually, each on the section concave plate of threshing the billet with the distance of board tooth is 3 ~ 15mm, each adjacent two on the crushing section concave plate the distance of billet equals and is 5 ~ 7mm, each on the crushing section concave plate the billet with the distance of nail tooth equals and all is less than 10 mm.

10. The combine harvester of claim 7, wherein: the chassis walking part comprises a plurality of driving wheels, the grain cleaning part comprises an upper sieve and a lower sieve, the upper sieve adopts a fish scale sieve, the opening degree of the opening of the fish scale sieve is adjustable, the lower sieve adopts a woven sieve structure, the aperture of the lower sieve is 6-8 mm, the vibration frequency of the upper sieve and the vibration frequency of the lower sieve are both 300 times/minute and 330 times/minute, and the horizontal amplitude of the upper sieve and the horizontal amplitude of the lower sieve are 30-40 mm; the vertical amplitude of the front end of the upper screen and the vertical amplitude of the front end of the lower screen are 10-15mm, and the vertical amplitude of the rear end of the upper screen and the vertical amplitude of the rear end of the lower screen are 20-30 mm.

Technical Field

The invention relates to the technical field of agricultural mechanical equipment, in particular to a millet threshing cylinder and a millet combined harvester.

Background

Millet belongs to small crops, straws are green and mature, ears of the millet are low in sag, grains are small and grains are light, in recent years, with popularization of domestic high-quality hybrid millet and great increase of coarse cereal consumption demands of markets, millet production is emphasized and expanded, production benefits and planting enthusiasm of farmers are greatly improved, and the current bottleneck influencing the largest millet production belongs to harvest.

At present, there is almost no special harvester for millet in agricultural machine products, so that most of the regions harvest millet by manual harvesting or wheat harvester by replacing parts.

The manual harvesting efficiency is extremely low and the labor cost is high; the mode that the peasant household used wheat harvester to reap millet concurrently is more, but this kind of mode is only based on the platform of wheat harvester, through the mode results of changing notch board, cylinder spare part or adjusting the spare part parameter, though it is efficient than artifical results, nevertheless because the straw takes green ripe, has higher toughness, is difficult broken, and threshing cylinder of harvester is unsuitable to the dynamics of beating and the dynamics of kneading of millet straw, can appear the straw jam threshing cylinder, smuggle the high and miscellaneous rate high grade problem of loss rate.

Disclosure of Invention

The invention aims to provide a millet threshing cylinder and a millet combined harvester, which are used for solving the problems in the prior art and can reduce the entrainment loss rate and impurity rate of millet and the blocking frequency of straws to the threshing cylinder.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a millet threshing cylinder which comprises a rear cylinder body, a plurality of plate teeth and a plurality of tooth bars, wherein the rear cylinder body sequentially comprises a threshing section and a crushing section which are connected along the direction far away from a feed inlet, the plurality of plate teeth are fixedly arranged on the outer side surface of the threshing section side by side along the circumferential direction of the rear cylinder body at intervals, the plurality of tooth bars are uniformly distributed on the outer side surface of the crushing section, and the plurality of tooth bars are arranged at an angle with the surface contacted with the outer side surface of the rear cylinder body.

Preferably, the ratio of the length of the threshing section to the length of the crushing section is 0.8-1.2.

Preferably, the threshing device further comprises a front material cylinder, the axis of the front material cylinder is overlapped with the axis of the rear roller body, the front material cylinder is fixedly connected with one end, far away from the crushing section, of the rear roller body, and the front material cylinder is used for conveying the plants which are not threshed towards the rear roller direction.

Preferably, the rear roller body comprises a roller shaft, a plurality of amplitude discs and a plurality of threshing toothed bars, the amplitude discs are arranged on the roller shaft along the axial direction of the roller shaft at uniform intervals, the threshing toothed bars are arranged in parallel at intervals along the circumferential direction of the rear roller, the threshing toothed bars are fixedly connected with the amplitude discs, and each threshing toothed bar is uniformly connected with one plate tooth and a plurality of toothed bars in a fixed mode.

Preferably, the advancing barrel is a closed conical barrel, the large end of the closed conical barrel is fixedly connected with the rear roller body, a plurality of helical blades are arranged on the side surface of the closed conical barrel along the circumferential direction of the closed conical barrel, and the helical blades can convey the plants which are not threshed towards the rear roller direction along with the rotation of the closed conical barrel.

Preferably, the plate teeth are corrugated bar plate teeth, the toothed bars are nail teeth, and the number of the spiral blades is 2-3.

The invention also provides a millet combine harvester which comprises a chassis walking part, a harvesting platform, a feeding conveying part, a cab, a threshing separation part, a grain cleaning part, a grain collecting auger, a grain elevator, a crushing and grass discharging part, a grain bin, a grain discharging part and a fan, wherein the harvesting platform, the feeding conveying part, the cab, the threshing separation part, the grain bin and the fan are fixedly arranged on the chassis walking part, the harvesting platform is arranged in front of the chassis walking part, the feeding conveying part and the cab are arranged above the front part of the chassis walking part, the cab is positioned above the feeding conveying part, the grain collecting auger, the grain cleaning part, the threshing separation part and the grain bin are fixedly arranged above the middle part of the chassis walking part from bottom to top in sequence, the rear output end of the harvesting platform is fixedly connected and communicated with the front end of the feeding conveying part, and the rear end of the feeding conveying part is hinged and communicated with the threshing separation part, threshing separation portion includes millet threshing cylinder as above and is located the top cap of threshing cylinder top with be located the grid concave plate of threshing cylinder below, the top cap with the grid concave plate surrounds threshing cylinder's lateral surface, and all with chassis walking portion fixed connection, smash row's grass portion fixed setting and be in threshing separation portion with the rear of cereal cleaning portion, and all with threshing separation portion's afterbody with the afterbody intercommunication of cereal cleaning portion, the fan is fixed to be set up smash row's grass portion's top, just the air outlet setting of fan is in the place ahead of cereal cleaning portion, cereal cleaning portion can be to following the mixed cereal that spills in the threshing separation portion carries out the vibration screening, and the millet falls into from cereal cleaning portion collect in the screw feeder, and impurity gets into under the vibration of the wind-force of fan and cereal screening portion outside the discharge behind the crushing row's grass portion, the lower end of the seed grain elevator is connected with the seed grain collecting auger, the upper end of the seed grain elevator is connected with the granary, the grain unloading part is fixed on the granary, one end of the grain unloading part extends into the granary and is close to the bottom of the granary, and the other end of the grain unloading part is used for extending into the granary or forming a channel for conveying grains in a transport vehicle.

Preferably, the grid concave includes a plurality of is located threshing section concave and a plurality of is located of threshing section below crushing section concave, a plurality of threshing section concave and a plurality of crushing section concave divide equally and do not include a plurality of baffles and a plurality of billet, and is a plurality of the baffle is fan ring shaped board, and is a plurality of threshing cylinder's lower part is followed threshing cylinder's rotation axis direction sets up at the interval side by side, and is a plurality of threshing cylinder's lower part is followed threshing cylinder's circumference sets up at the interval side by side, just the billet with baffle fixed connection, a plurality of threshing section concave and a plurality of crushing section concave is all in threshing cylinder's below is followed threshing cylinder's axial sets up side by side.

Preferably, a plurality of thresh adjacent two on the section concave board the distance of billet is followed and is close to the direction of crushing section reduces gradually, each thresh adjacent two on the section concave board the distance of billet is 5 ~ 11mm, a plurality of on the section concave board of threshing the billet with the distance of board tooth is followed and is close to the direction of crushing section reduces gradually, each on the section concave board of threshing the billet with the distance of board tooth is 3 ~ 15mm, each adjacent two on the crushing section concave board the distance of billet equals and is 5 ~ 7mm, each on the crushing section concave board the billet with the distance of spike tooth equals and all is less than 10 mm.

Preferably, the chassis walking part comprises a plurality of driving wheels, the grain cleaning part comprises an upper sieve and a lower sieve, the upper sieve adopts a fish scale sieve, the opening degree of the fish scale sieve is adjustable, the lower sieve adopts a woven sieve structure, the aperture of the lower sieve is 6-8 mm, the vibration frequency of the upper sieve and the vibration frequency of the lower sieve are both 300-330 times/minute, and the horizontal amplitude of the upper sieve and the horizontal amplitude of the lower sieve are 30-40 mm; the vertical amplitude of the front end of the upper screen and the vertical amplitude of the front end of the lower screen are 10-15mm, and the vertical amplitude of the rear end of the upper screen and the vertical amplitude of the rear end of the lower screen are 20-30 mm.

Compared with the prior art, the invention has the following technical effects:

the invention provides a millet threshing cylinder and a millet combine harvester.A plurality of plate teeth are arranged on a threshing section of a rear cylinder body, a plurality of toothed bars are arranged on a crushing section, and the plate teeth rotating along with the cylinder body only rub ungranulated millet plants, so that millet is separated from ears of the millet, the toughness of the millet straws is damaged, the millet straws are easy to strike and crush, and the blocking frequency of the threshing cylinder is reduced; then the threshing and separating effect of the millet is further improved by beating and crushing the ungranulated millet plants through a plurality of gear rods which rotate along with the roller body, and the entrainment loss rate and impurity rate of the millet can be reduced.

Furthermore, the ratio of the length of the threshing section to the length of the crushing section is 0.8-1.2, and the ratio range has the advantages of lowest blockage frequency of the millet to the threshing cylinder, best threshing and separating effect of the millet, low entrainment loss rate and low impurity content rate.

Furthermore, the arrangement of the front feed cylinder can conveniently convey the plants which are not threshed towards the rear threshing cylinder, thereby improving the working efficiency of the millet combine harvester.

Furthermore, the rear roller body comprises a roller shaft, a plurality of breadth discs and a plurality of threshing toothed bars, and the rear roller is simple in structure and easy to manufacture.

Furthermore, the feeding barrel is a closed conical barrel, and a plurality of helical blades are arranged on the side face of the closed conical barrel along the circumferential direction of the closed conical barrel, so that the structure is simple, and the conveying efficiency is high.

Furthermore, the plate teeth are the rasp bar plate teeth, and the toothed bar is the nail teeth, so the plate teeth are easy to purchase and low in price; the number of the spiral blades is 2-3, and the conveying effect is optimal.

Furthermore, the grid concave plate comprises a plurality of threshing section concave plates and a plurality of crushing section concave plates, the threshing section concave plates and the crushing section concave plates respectively comprise a plurality of partition plates and a plurality of steel bars, and the grid concave plate is simple in structure, easy to manufacture and good in separating effect.

Furthermore, the distance between two adjacent steel bars on the concave plates of the plurality of threshing sections is gradually reduced along the direction close to the crushing section, so that the size of impurities is reduced along with the increase of the kneading time of the millet plants, the throughput of the impurities is reduced, the workload of a grain cleaning part is reduced, and the impurity content of the millet is reduced; the distance between the steel bars and the plate teeth on the concave plates of the threshing sections is gradually reduced along the direction close to the crushing sections, the kneading volume of the millet plants is reduced, the kneading effect of the millet plants can be improved, and the threshing effect of the millet is improved.

Further, the grain cleaning part comprises an upper sieve and a lower sieve, the upper sieve adopts a fish scale sieve, the opening degree of the fish scale sieve is adjustable, the lower sieve adopts a woven sieve structure, the aperture of the lower sieve is 6-8 mm, the vibration frequency of the upper sieve and the vibration frequency of the lower sieve are both 300 times/minute, and the horizontal amplitude of the upper sieve and the horizontal amplitude of the lower sieve are 30-40 mm; the vertical amplitude of the front end of the upper screen and the vertical amplitude of the front end of the lower screen are 10-15mm, the vertical amplitude of the rear end of the upper screen and the vertical amplitude of the rear end of the lower screen are 20-30mm, and the screening and separating effects of the millet are optimal by selecting the sizes of the upper screen and the lower screen and the amplitudes of the screens of the specifications.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a millet threshing cylinder provided in one embodiment;

FIG. 2 is a schematic structural view of a combine harvester for millet provided in the second embodiment;

FIG. 3 is a schematic view of an assembly structure of a top plate and a grid concave plate in the combine harvester for millet provided by the second embodiment;

FIG. 4 is a schematic structural view of an intaglio plate of a threshing section in the combine harvester for millet provided by the second embodiment;

FIG. 5 is a schematic structural view of a pulverizing section intaglio plate in the combine harvester for millet provided by the second embodiment;

in the figure: 100-millet threshing cylinder, 1-rear cylinder body, 2-plate teeth, 3-toothed bar, 4-threshing section, 5-crushing section, 6-advancing charging barrel, 7-cylinder shaft, 8-amplitude disc, 9-threshing toothed bar and 10-helical blade;

200-millet combine harvester, 11-chassis walking part, 12-harvesting table, 13-feeding conveying part, 14-cab, 15-threshing separation part, 16-grain cleaning part, 17-crushing and grass discharging part, 18-granary, 19-grain unloading part, 20-fan, 21-top cover, 22-grid concave plate, 23-threshing section concave plate, 24-crushing section concave plate, 25-partition plate and 26-steel bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a millet threshing cylinder and a millet combined harvester, which are used for solving the problems in the prior art and can reduce the entrainment loss rate and impurity rate of millet and the blocking frequency of straws to the threshing cylinder.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example one

The present embodiment provides a grain threshing cylinder 100, as shown in fig. 1, in the present embodiment, the grain threshing cylinder 100 includes a rear cylinder body 1, a plurality of plate teeth 2 and a plurality of rack bars 3, the rear cylinder body 1 sequentially includes a threshing section 4 and a crushing section 5 connected along a direction away from a feeding port, the plurality of plate teeth 2 are fixedly disposed on an outer side surface of the threshing section 4 side by side along a circumferential direction of the rear cylinder body 1, the plurality of rack bars 3 are uniformly distributed on an outer side surface of the crushing section 5, the plurality of rack bars 3 are all disposed at an angle with a surface contacting with the outer side surface of the rear cylinder body 1, the angle is preferably 90 degrees, the plurality of plate teeth 2 are disposed on the threshing section 4 of the rear cylinder body 1, the crushing section 5 is disposed with the plurality of rack bars 3, the plurality of plate teeth 2 rotating with the rear cylinder body 1 are used to rub and separate non-milled grain plants, not only to separate grains from ears, meanwhile, the toughness of the millet straws is damaged, so that the millet straws are easy to strike and crush, and the blocking frequency of the threshing cylinder is reduced; then, the threshing and separating effect of the millet is further improved by beating and crushing the ungranulated millet plants through a plurality of gear rods 3 which rotate along with the roller body 1, and the entrainment loss rate and impurity rate of the millet can be reduced.

The ratio of the length of the threshing section 4 to the length of the crushing section 5 is 0.8-1.2, preferably 1, and within the range of the ratio, the blockage frequency of the millet to the threshing cylinder is lowest, the threshing and separating effect of the millet is best, and the entrainment loss rate and impurity content rate are lower.

The millet threshing cylinder 100 further comprises an advancing charging barrel 6, the axis of the advancing charging barrel 6 coincides with the axis of the rear cylinder body 1, the advancing charging barrel 6 is fixedly connected with one end, far away from the crushing section 5, of the rear cylinder body 1, the advancing charging barrel 6 is used for conveying non-threshed plants to the rear cylinder direction, the non-threshed plants can be conveniently conveyed to the rear threshing cylinder direction, and the working efficiency of the millet combine harvester 200 is improved.

Rear cylinder body 1 includes drum shaft 7, a plurality of width of cloth dish 8 and a plurality of ratch 93 of threshing, simple structure, easily preparation, a plurality of width of cloth dishes 8 are along the even interval fixed setting of drum shaft 7's axial on drum shaft 7, a plurality of ratches 93 of threshing set up along rear cylinder's circumference side by side the interval, and a plurality of ratches 93 and a plurality of width of cloth dish 8 equal fixed connection, divide equally on each ratch 93 respectively fixed connection a board tooth 2 and a plurality of ratch 3.

The advancing charging barrel 6 is a closed conical barrel, the large end of the closed conical barrel is fixedly connected with the rear roller body 1, a plurality of helical blades 10 are arranged on the side face of the closed conical barrel along the circumferential direction of the closed conical barrel, the helical blades 10 can convey non-threshed plants to the rear roller direction along with the rotation of the closed conical barrel, the structure is simple, and the conveying efficiency is high.

The board tooth 2 is rasp bar board tooth 2, and ratch 3 is the spike tooth, easily purchases, and the low price, and helical blade 10's quantity is 2 ~ 3, preferably 2, carries the effect best.

Example two

The present embodiment provides a combine harvester 200, as shown in fig. 1-5, in the present embodiment, the combine harvester 200 includes a chassis walking portion 11, a harvesting platform 12 fixedly disposed on the chassis walking portion 11, a feeding conveying portion 13, a cab 14, a threshing separation portion 15, a grain cleaning portion 16, a grain collecting auger, a grain elevator, a grass crushing and discharging portion 17, a grain bin 18, a grain unloading portion 19, and a fan 20, the harvesting platform 12 is disposed in front of the chassis walking portion 11, the feeding conveying portion 13 and the cab 14 are disposed above the front portion of the chassis walking portion 11, the cab 14 is disposed above the feeding conveying portion 13, the grain collecting auger, the grain cleaning portion 16, the threshing separation portion 15, and the grain bin 18 are sequentially and fixedly disposed above the middle portion of the chassis walking portion 11 from bottom to top, a rear output end of the harvesting platform 12 is fixedly connected and communicated with a front end of the feeding conveying portion 13, the rear end of feeding conveying part 13 is articulated and communicated with threshing separation part 15, threshing separation part 15 includes millet threshing cylinder 100 in embodiment one and top cover 21 that is located threshing cylinder top and grid concave 22 that is located threshing cylinder below, top cover 21 and grid concave 22 surround threshing cylinder's lateral surface, and all with chassis walking portion 11 fixed connection, smash row grass portion 17 and fix the rear that sets up at threshing separation part 15 and grain cleaning portion 16, and all communicate with the afterbody of threshing separation part 15 and the afterbody of grain cleaning portion 16, fan 20 is fixed to be set up in the top of smashing row grass portion 17, and the air outlet of fan 20 sets up in the place ahead of grain cleaning portion 16, grain cleaning portion 16 can carry out the vibration screening to the mixed cereal that leaks from in seed grain separation part 15, the millet falls into from grain cleaning collection screw feeder from grain portion 16 and collects, impurity gets into after smashing row grass portion 17 and discharges outside the machine under the wind-force of fan 20 and the vibration effect of grain screening portion 16 The lower end of a grain elevator is connected with a grain collecting auger, the upper end of the grain elevator is connected with a grain bin 18, a grain unloading part 19 is fixed on the grain bin 18, one end of the grain unloading part 19 extends into the grain bin 18 and is close to the bottom of the grain bin 18, the other end of the grain unloading part 19 is used for extending into the grain bin 18 or forming a channel for conveying grains in a transport vehicle, a header 12 can adopt a grain combine harvester header disclosed in patent CN209659967U (publication number), a re-threshing mechanism can be arranged below the tail part of a grain cleaning part 16, the re-threshing mechanism can receive unqualified threshed crops falling from the tail part of the grain cleaning part 16 and convey the unqualified crops into a threshing roller for threshing separation again until the threshing is qualified, a plurality of plate teeth 2 are arranged on a threshing section 4 of a rear roller body 1, a plurality of tooth rods 3 are arranged on a pulverizing section 5, and the ungranulated millet plants are kneaded by the plate teeth 2 rotating along with the rear roller body 1, not only separating the millet from the ears, but also destroying the toughness of the millet straws, so that the millet straws are easy to strike and crush, thereby reducing the blocking frequency of the threshing cylinder; then, the threshing separation effect of the millet is further improved by beating and crushing the ungranulated millet plants through a plurality of toothed bars 3 which rotate along with the roller body 1, the entrainment loss rate and the impurity content of the millet can be reduced, the feeding amount of the millet combine harvester is more than 4kg, the entrainment loss rate is less than 4 percent, the millet crushing rate is less than 2 percent and the impurity content is less than 2 percent, which are detected by a professional mechanism.

The working process of the millet combine harvester comprises the following steps: the grain crops in the field are harvested by the header on the header 12, the grain crops are conveyed into the feeding conveying part 13 by the rotary auger and then conveyed into the threshing separation part 15 by the feeding conveying part 13, the grain threshing cylinder 100 in the threshing separation part 15 rotates to carry out rubbing threshing, striking and separating treatment on the grain crops, the long straws enter the crushing and grass discharging part 17 through the tail part of the threshing separation part 15 to be crushed and discharged out of the machine, the mixed grains are separated and fall onto the grain cleaning part 16, the impurities in the mixed grains enter the crushing and grass discharging part 17 to be crushed and discharged out of the machine under the wind force blown by the fan 20 and the vibration action force of the grain cleaning part 16, the grains fall into the grain collecting auger, the grain is conveyed into the grain bin 18 through the grain lifter, and after the grain bin 18 is full of grains, the grain unloading part 19 conveys the grains in the grain bin 18 into the grain bin or onto a transport vehicle.

Grid notch board 22 includes that a plurality of is located threshing section notch board 23 and a plurality of crushing section notch board 24 that are located 5 below of crushing section of 4 below of threshing section, a plurality of threshing section notch board 23 and a plurality of crushing section notch board 24 are equallyd divide and are do not include a plurality of baffles 25 and a plurality of billet 26, a plurality of baffles 25 are fan ring shaped board, a plurality of baffles 25 set up along threshing cylinder's rotation axis direction side by side interval in threshing cylinder's lower part, a plurality of billet 26 set up along threshing cylinder's circumference side by side interval in threshing cylinder's lower part, and billet 26 and baffle 25 fixed connection, a plurality of threshing section notch board 23 and a plurality of crushing section notch board 24 all set up along threshing cylinder's axial side by side in threshing cylinder's below, moreover, the steam generator is simple in structure, easily the preparation, and the separation effect is.

The distance between two adjacent steel bars 26 on the threshing section concave plates 23 is gradually reduced along the direction close to the crushing section 5, the size of sundries is reduced along with the increase of kneading time of millet plants, the throughput of the sundries is reduced, the workload of a millet cleaning part is reduced, the impurity content of the millet is reduced, the distance between two adjacent steel bars 26 on each threshing section concave plate 23 is 5-11 mm, preferably, the maximum distance is 10mm, the minimum distance is 6mm, the distance between the steel bars 26 on the threshing section concave plates 23 and the plate teeth 2 is gradually reduced along the direction close to the crushing section 5, the kneading effect of the millet plants can be improved along with the reduction of the kneaded volume of the millet plants, the threshing effect of the millet is improved, the distance between the steel bars 26 on each threshing section concave plate 23 and the plate teeth 2 is 3-15 mm, the distance between two adjacent steel bars 26 on each crushing section concave plate 24 is equal and is 5-7 mm, preferably 6mm, and the distance between the steel strips 26 and the spike teeth on each crushing section concave plate 24 is equal and less than 10 mm.

The chassis walking part 11 comprises a plurality of driving wheels, and the millet combine harvester 200 advances through the driving wheels, so that the combine harvester is more suitable for harvesting large paddy fields in northern plain areas; the grain cleaning part 16 comprises an upper sieve and a lower sieve, the upper sieve adopts a fish scale sieve, the opening degree of the fish scale sieve is adjustable, the lower sieve adopts a woven sieve structure, the aperture of the lower sieve is 6-8 mm, preferably 7mm, the vibration frequency of the upper sieve and the vibration frequency of the lower sieve are both 300 times/minute and 330 times/minute, preferably 320 times/minute, and the horizontal amplitude of the upper sieve and the horizontal amplitude of the lower sieve are 30-40mm, preferably 35 mm; the vertical amplitude of the front end of the upper screen and the vertical amplitude of the front end of the lower screen are 10-15mm, preferably 12mm, the vertical amplitude of the rear end of the upper screen and the vertical amplitude of the rear end of the lower screen are 20-30mm, preferably 25mm, and the screening and separating effects of the millet are optimal by selecting the sizes of the upper screen and the lower screen and the amplitudes of the screens of the specifications.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.