阅读说明：本技术 一种用于联合收割机的高通量脱粒清选装置 (High-flux threshing and cleaning device for combine harvester ) 是由 王志明 周璇 丁肇 傅云峰 田立权 于 2021-09-22 设计创作，主要内容包括：一种用于联合收割机的高通量脱粒清选装置,涉及农业装备技术领域,解决脱粒清选装置如何进行循环筛选的技术问题,包括有脱粒装置、清选装置和籽粒传输装置；清选装置包括有第一风机、双层筛网振动筛、分离装置、第一运输装置和第二风机；双层筛网振动筛位于脱粒装置和籽粒传输装置之间,双层筛网振动筛的第一筛网废料出口与分离装置的入料口连通,第一运输装置连通双层筛网振动筛的入料口和分离装置的出料口；第一风机用于在双层筛网振动筛与脱粒装置之间输出朝向脱粒清选装置外的高速气流；第二风机用于在双层筛网振动筛与籽粒传输装置之间输出朝向脱粒清选装置外的高速气流,从而让作物在做到高质筛选的同时还做到了高通量。(A high-flux threshing and cleaning device for a combine harvester relates to the technical field of agricultural equipment, solves the technical problem of how to carry out circular screening on the threshing and cleaning device, and comprises a threshing device, a cleaning device and a grain transmission device; the cleaning device comprises a first fan, a double-layer screen vibrating screen, a separating device, a first conveying device and a second fan; the double-layer screen vibrating screen is positioned between the threshing device and the seed conveying device, a first screen waste outlet of the double-layer screen vibrating screen is communicated with a feeding port of the separating device, and the first conveying device is communicated with the feeding port of the double-layer screen vibrating screen and a discharging port of the separating device; the first fan is used for outputting high-speed airflow which faces the outside of the threshing and cleaning device between the double-layer screen vibrating screen and the threshing device; the second fan is used for outputting high-speed airflow towards the outside of the threshing and cleaning device between the double-layer screen vibrating screen and the grain conveying device, so that high-quality screening and high-flux of crops are realized.)

1. A high-flux threshing and cleaning device for a combine harvester comprises a threshing device (1), a cleaning device (2) and a grain conveying device (3);

the cleaning device (2) is arranged below the threshing device (1), and the grain conveying device (3) is arranged below the cleaning device (2);

it is characterized in that the preparation method is characterized in that,

the cleaning device (2) comprises a first fan (2a), a double-layer screen vibrating screen (2b), a separating device (2c), a first conveying device (2d) and a second fan (2 e);

the double-layer screen vibrating screen (2b) is provided with a vibrating screen feeding port (2b5), a kernel outlet port (2b6), a first screen waste outlet port (2b7) and a second screen waste outlet port (2b 8);

the vibrating screen feeding port (2b5) is positioned below the threshing device (1), the grain outlet (2b6) is positioned above the grain conveying device (3), and the first screen waste outlet (2b7) is positioned above the second screen waste outlet (2b 8);

the separating device (2c) is provided with a third feeding port (2c1) and a third discharging port (2c2), and the third feeding port (2c1) is communicated with the first screen waste outlet (2b 7);

the input end of the first conveying device (2d) is communicated with the third discharge hole (2c2) of the separating device (2c), and the output end of the first conveying device (2d) is communicated with the vibrating screen feeding hole (2b 5);

the first fan (2a) is used for outputting high-speed airflow flowing from the first vibrating screen (2b1) to the separating device (2c) between the double-layer screen vibrating screen (2b) and the threshing device (1);

the second fan (2e) is used for outputting high-speed airflow which flows from the grain outlet (2b6) to the direction of the second screen waste outlet (2b8) between the double-layer screen vibrating screen (2b) and the grain conveying device (3).

2. A high throughput threshing and cleaning plant for a combine harvester according to claim 1, characterized in that the threshing device (1) comprises a threshing cylinder (1a) and a re-threshing device (1 b).

The threshing cylinder (1a) is provided with a first feeding port (1a1), a first finished product outlet (1a2) and a first waste material outlet (1a 3);

the re-threshing device (1b) is located below the first waste outlet (1a3), the re-threshing device (1b) is provided with a second feeding port (1b4), a second finished product outlet (1b5) and a second waste outlet (1b6), and the second feeding port (1b4) is communicated with the first waste outlet (1a 3).

3. A high throughput threshing and cleaning plant for a combine harvester according to claim 2, characterized in that the re-threshing device (1b) comprises a second cylinder (1b1), a rotating roller (1b2), a re-threshing screen (1b3), a second screen waste outlet (2b8) and a second servomotor (1b 7);

the second cylinder (1b1) is arranged below the first waste outlet (1a3), the axis of the second cylinder (1b1) is vertical to the axis of the first cylinder (1a8), and the circumferential surface of the second cylinder (1b1) is provided with a second feeding port (1b4) and a second waste outlet (1b6) along the axial direction;

the rotary roller (1b2) is coaxially arranged in the inner cavity of the second cylinder (1b1), and the circumferential surface of the rotary roller (1b2) is provided with a plurality of second threshing teeth (1b 8);

the re-threshing screen (1b3) is arranged on the second cylinder (1b1) and is positioned below the rotating roller (1b 2);

the second servo motor (1b7) is arranged on the outer side of the second cylinder body (1b1), and the second servo motor (1b7) is used for driving the rotating roller (1b2) to rotate.

4. A high throughput threshing and cleaning unit for a combine harvester according to claim 1, characterized in that the double screen shaker (2b) comprises a first shaker screen (2b1), a second shaker screen (2b2), a screen box (2b3) and a shaker motor (2b4) driving the screen box (2b3) to shake;

the top of the screen box (2b3) is provided with a vibrating screen feeding port (2b5), the vibrating screen feeding port (2b5) is positioned below the threshing device (1), the bottom of the screen box (2b3) is provided with a seed outlet (2b6), and the seed outlet (2b6) is positioned above the seed conveying device (3);

a first screen waste outlet (2b7) is formed in the middle of one side of the screen box (2b3), and a second screen waste outlet (2b8) is formed in the bottom of the same side of the first screen waste outlet (2b 7);

a first vibrating screen (2b1) and a second vibrating screen (2b2) are obliquely arranged in the inner cavity of the screen box (2b3), the lower end of the first vibrating screen (2b1) is connected with a first screen waste outlet (2b7), and the lower end of the second vibrating screen (2b2) is connected with a second screen waste outlet (2b 8).

5. A high throughput threshing and cleaning unit for a combine harvester according to claim 4, characterized in that the double screen shaker (2b) further comprises dampers (2b9), and a plurality of dampers (2b9) are provided at the bottom of the double screen shaker (2 b).

6. A high throughput threshing and cleaning plant for a combine harvester according to claim 4, characterised in that the working range of the vibrating screen inlet (2b5) includes a first product outlet (1a2) and a second product outlet (1b 5).

7. A high throughput threshing and cleaning plant for a combine harvester according to claim 1, characterized in that the separating device (2c) comprises a separating tub (2c3), a separating screen (2c4), a separating shaft (2c5), a separating rod (2c6) and a third servomotor (2c 7);

a third feeding port (2c1) and a third discharging port (2c2) are arranged on the circumferential surface of the separating barrel (2c3), a separating shaft (2c5) is coaxially arranged inside the separating barrel (2c3), a plurality of separating rods (2c6) are arranged on the separating shaft (2c5), a third servo motor (2c7) is arranged outside the separating barrel (2c3), a third servo motor (2c7) is used for driving the separating shaft (2c5) to rotate, and a separating screen (2c4) is arranged on the third discharging port (2c 2).

8. A high throughput threshing and cleaning plant for a combine harvester according to claim 1, characterized in that the first transporting device (2d) comprises a conveyor belt (2d1), an ascending auger transporting device (2d2) and a transverse auger transporting device (2d 3);

the conveyor belt (2d1) is arranged below the separating device (2c), and the input end of the conveyor belt (2d1) is communicated with the discharge port of the separating device (2 c);

the ascending auger conveying device (2d2) is arranged on one side of the double-layer screen vibrating screen (2b), and the input end of the ascending auger conveying device (2d2) is communicated with the output end of the conveyor belt (2d 1);

the horizontal auger conveyer (2d3) is arranged above the double-layer screen vibrating screen (2b), the input end of the horizontal auger conveyer (2d3) is communicated with the output end of the ascending auger conveyer (2d2), and the output end of the horizontal auger conveyer (2d3) is communicated with a vibrating screen feeding port (2b 5).

9. A high throughput threshing and cleaning unit for a combine harvester according to claim 1, characterised in that the first fan (2a) is arranged at the end of the double screen shaker (2b) remote from the separating unit (2 c).

10. A high throughput threshing and cleaning plant for a combine harvester according to claim 1, characterized in that the cleaning plant (2) further comprises a second fan (2 e);

the second fan (2e) is arranged below the first fan (2a) and is positioned between the double-layer screen vibrating screen (2b) and the kernel conveying device (03).

Technical Field

The invention relates to the technical field of agricultural equipment, in particular to a high-flux threshing and cleaning device for a combine harvester.

Background

A combine harvester is a machine which can complete the operations of harvesting, threshing, separating and cleaning of grains and finally obtain clean grains. The combine harvester can greatly improve the labor productivity and reduce the labor intensity. The power configuration mode can be divided into a traction type, a self-propelled type and a suspension type. The combine combines the harvesting, threshing and cleaning in one integral unit, so that the farmer can complete the harvesting, threshing and cleaning in a single operation. Thereby saving manpower and material resources and greatly reducing the burden of farmers.

However, the prior combine harvester still has some problems, namely 1, after the crops pass through a threshing device of the combine harvester, a few grains still exist in stems and stalks of the crops, and the problem of incomplete threshing is solved; 2. at present, the cleaning device screens successfully screened grains for multiple times, and directly discharges the grains failing in the first screening out of the combine harvester, so that the loss rate is obviously greatly increased, and waste is caused.

Disclosure of Invention

In order to solve the technical problem, the high-flux threshing and cleaning device for the combine harvester is provided, so that grains can be circularly screened during threshing and cleaning of crops, the threshing rate is increased on the premise of meeting high flux, and the loss rate and the impurity rate are reduced.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

a high-flux threshing and cleaning device for a combine harvester comprises a threshing device, a cleaning device and a grain conveying device; the cleaning device is arranged below the threshing device, and the seed conveying device is arranged below the cleaning device; the cleaning device comprises a first fan, a double-layer screen vibrating screen, a separating device, a first conveying device and a second fan; the double-layer screen vibrating screen is provided with a vibrating screen feeding port, a seed outlet, a first screen waste outlet and a second screen waste outlet; the vibrating screen feeding port is positioned below the threshing device, the grain outlet is positioned above the grain conveying device, and the first screen waste outlet is positioned above the second screen waste outlet; the separating device is provided with a third feeding port and a third discharging port, and the third feeding port is communicated with the first screen waste outlet; the input end of the first conveying device is communicated with the third discharge hole of the separating device, and the output end of the first conveying device is communicated with the feed inlet of the vibrating screen; the first fan is used for outputting high-speed airflow flowing from the first vibrating screen towards the separating device between the double-layer screen vibrating screen and the threshing device; the second fan is used for outputting high-speed airflow flowing from the grain outlet to the direction of the second screen waste outlet between the double-layer screen vibrating screen and the grain conveying device.

Preferably, the threshing device comprises a threshing cylinder and a re-threshing device. The threshing cylinder is provided with a first feeding port, a first finished product outlet and a first waste outlet; the re-threshing device is located below the first waste outlet and is provided with a second feeding port, a second finished product outlet and a second waste outlet, and the second feeding port is communicated with the first waste outlet.

Preferably, the re-threshing device comprises a second cylinder, a rotating roller, a re-threshing sieve, a second screen waste outlet and a second servo motor; the second barrel is arranged below the first waste outlet, the shaft of the second barrel is vertical to the shaft of the first barrel, and the circumferential surface of the second barrel is provided with a second feeding port and a second waste outlet along the axial direction; the rotary roller is coaxially arranged in the inner cavity of the second cylinder body, and the circumferential surface of the rotary roller is provided with a plurality of second threshing teeth; the secondary screen is arranged on the second cylinder and is positioned below the rotating roller; the second servo motor is arranged on the outer side of the second cylinder and used for driving the rotary roller to rotate.

Preferably, the double-layer screen vibrating screen comprises a first vibrating screen, a second vibrating screen, a screen box and a vibrating motor for driving the screen box to vibrate; the top of the screen box is provided with a vibrating screen feeding port which is positioned below the threshing device, the bottom of the screen box is provided with a seed outlet which is positioned above the seed conveying device; a first screen mesh waste outlet is formed in the middle of one side of the screen box, and a second screen mesh waste outlet is formed in the bottom of the same side as the first screen mesh waste outlet; the sieve box is characterized in that a first vibrating screen and a second vibrating screen are obliquely arranged in the inner cavity of the sieve box, the lower end of the first vibrating screen is connected with a first screen waste outlet, and the lower end of the second vibrating screen is connected with a second screen waste outlet.

Preferably, the double-layer screen vibrating screen further comprises a shock absorber, and the shock absorbers are arranged at the bottom of the double-layer screen vibrating screen.

Preferably, the working range of the feed port of the vibrating screen comprises a first finished product outlet and a second finished product outlet.

Preferably, the separating device comprises a separating barrel, a separating screen, a separating shaft, a separating rod and a third servo motor; the periphery of the separation barrel is provided with a third feeding port and a third discharging port, the separation shafts are coaxially arranged inside the separation barrel, the separation rods are arranged on the separation shafts, the third servo motor is arranged outside the separation barrel and used for driving the separation shafts to rotate, and the separation screen is arranged on the third discharging port.

Preferably, the first conveying device comprises a conveyor belt, a lifting screw conveyer and a transverse screw conveyer; the conveying belt is arranged below the separating device, and the input end of the conveying belt is communicated with the discharge hole of the separating device; the ascending auger conveying device is arranged on one side of the double-layer screen vibrating screen, and the input end of the ascending auger conveying device is communicated with the output end of the conveying belt; the horizontal auger conveyer sets up in the top of double-deck screen cloth shale shaker, and horizontal auger conveyer's input and the output intercommunication of the auger conveyer that rises, horizontal auger conveyer's output and shale shaker pan feeding mouth intercommunication.

Preferably, the first fan is arranged at one end of the double-layer screen vibrating screen far away from the separating device.

Preferably, the cleaning device also comprises a second fan; the second fan is arranged below the first fan and is positioned between the double-layer screen vibrating screen and the grain conveying device.

Compared with the prior art, the application has the beneficial effects that:

1. the separation device and the conveying device are arranged at the waste material outlet of the first vibrating screen of the double-layer screen vibrating screen, and the threshing device, the seed conveying device, the first fan and the second fan are matched, so that the function of circularly screening crops in the threshing and cleaning device is realized, the net threshing rate is increased, the loss rate is reduced, and the characteristic of high flux is realized;

2. the secondary screening function of the crops is realized by arranging the re-threshing device at the waste outlet of the threshing cylinder, so that the threshing of the crops in the threshing device becomes more effective, and the success rate of threshing is increased;

3. according to the threshing device of the combine harvester, the second servo motor is used for driving the rotary roller with the threshing teeth to rotate, and the re-threshing sieve is arranged below the rotary roller, so that the effect of secondary threshing is achieved, the problem that the combine harvester cannot successfully thresh during threshing is solved, and the threshing effect of the threshing device of the combine harvester is improved;

4. the first vibrating screen and the second vibrating screen are obliquely arranged in the double-layer screen vibrating screen to form secondary screening, so that the technical problem that single screening is not accurate enough is solved, the success rate of screening seeds is increased, and waste is reduced;

5. the vibration frequency of the double-layer screen vibrating screen can be better controlled by arranging the plurality of shock absorbers at the bottom of the screen box, so that the double-layer screen vibrating screen can work better;

6. by setting the working range of the feeding port of the vibrating screen, the mixture threshed by the threshing device can enter the vibrating screen with the double-layer screen to be screened, so that the phenomenon that the mixture is discharged out of the threshing and cleaning device without being screened is prevented;

7. the separation device is used for executing the steps of the separation device through the separation barrel, the separation screen, the separation shaft, the separation rod and the motor, so that the technical problems of screen leakage, screen shortage and unscreening success of separation of a thick mixture are solved;

8. according to the method, the mixture separated by the separating device can return to the first vibrating screen again for screening in a mode that the conveyor belt, the ascending auger conveying device and the output end of the input end of the transverse auger conveying device are connected at the head, so that the technical problem of how to convey the mixture through circular screening is solved;

9. the first fan is arranged in the cleaning device, so that primary air separation is realized between the threshing device and the double-layer screen vibrating screen, light impurities can be sent out of the threshing cleaning device by the first fan, the possibility of blockage of a screen of the double-layer screen vibrating screen is reduced, the screening burden of the double-layer screen vibrating screen is reduced, and the screening speed of the double-layer screen vibrating screen is increased;

10. this application is through setting up the second fan in cleaning device for form high-speed mobile air current between double screen cloth shale shaker and seed grain transmission device, thereby let the seed grain after the double screen cloth shale shaker screening carry out the selection by winnowing once more, let unnecessary light impurity in the seed grain see out the sieving mechanism that threshes, promote the quality of final grain of appearing.

Drawings

FIG. 1 is a perspective view from a first perspective embodying the present invention;

FIG. 2 is a perspective view from a second perspective embodying the present invention;

FIG. 3 is a side view of one implementation of the present invention;

FIG. 4 is a front view of one implementation of the present invention;

FIG. 5 is a cross-sectional view taken along section A-A of FIG. 4;

FIG. 6 is a perspective cross-sectional view taken along section A-A of FIG. 4;

FIG. 7 is a perspective view of a detachment device embodying the present invention;

FIG. 8 is a side view of a detachment apparatus embodying the present invention;

FIG. 9 is an exploded view of a breakaway roller embodying the present invention;

FIG. 10 is a perspective view of a double screen shaker, a separating apparatus and a first conveyance apparatus embodying the present invention;

FIG. 11 is a schematic view of the communication of a double screen shaker, a separating apparatus and a first conveyance apparatus at a first perspective of practicing the invention;

FIG. 12 is a schematic view of the communication of a double screen shaker, a separating apparatus and a first conveyance apparatus at a second perspective of practicing the invention;

fig. 13 is a partial enlarged view at B of fig. 11;

FIG. 14 is a perspective view of a double screen shaker embodying the present invention;

fig. 15 is a perspective view of a first conveyance device embodying the present invention.

The reference numbers in the figures are:

1-a threshing device; 1 a-a threshing cylinder; 1a 1-first inlet; 1a 2-first product outlet; 1a3 — first waste outlet; 1a 4-spiral feeding cone; 1a 5-threshing cylinder shaft; 1a 6-first threshing teeth; 1a7 — first servomotor; 1a 8-first cylinder; 1a 9-threshing screen; 1 b-a rethreshing device; 1b 1-second cylinder; 1b 2-rotating roller; 1b 3-rethreshing screen mesh; 1b 4-second inlet; 1b 5-second product outlet; 1b 6-second waste outlet; 1b 7-second servomotor; 1b 8-second threshing teeth;

2-a cleaning device; 2 a-a first fan; 2 b-a double-layer screen vibrating screen; 2b1 — first vibrating screen; 2b 2-second vibrating screen; 2b 3-sieve box; 2b 4-vibrating motor; 2b 5-vibrating screen feed inlet; 2b 6-seed outlet; 2b 7-first screen waste outlet; 2b 8-second screen waste outlet; 2b 9-shock absorber; 2 c-a separation device; 2c 1-third inlet; 2c 2-third outlet; 2c 3-separation bucket; 2c 4-separation screen; 2c 5-split axis; 2c 6-separator bar; 2c 7-third servomotor; 2 d-a first transport device; 2d1 — conveyor belt; 2d 2-ascending auger transport; 2d 3-cross auger transport; 2 e-a second fan;

3-a kernel conveying device; 3 a-a guide plate; 2 b-a kernel auger; 3c sundries auger.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In order to solve the technical problem of how to carry out circular screening on a high-flux threshing and cleaning device of a combine harvester, the following preferred technical scheme is provided as shown in figures 1-6:

a high-flux threshing and cleaning device for a combine harvester comprises a threshing device 1, a cleaning device 2 and a grain conveying device 3; the cleaning device 2 is arranged below the threshing device 1, and the seed grain conveying device 3 is arranged below the cleaning device 2; the cleaning device 2 comprises a first fan 2a, a double-layer screen vibrating screen 2b, a separating device 2c, a first conveying device 2d and a second fan 2 e; the double-layer screen vibrating screen 2b is provided with a vibrating screen feeding port 2b5, a kernel outlet port 2b6, a first screen waste outlet port 2b7 and a second screen waste outlet port 2b 8; the vibrating screen feeding port 2b5 is positioned below the threshing device 1, the grain outlet port 2b6 is positioned above the grain conveying device 3, and the first screen waste outlet port 2b7 is positioned above the second screen waste outlet port 2b 8; the separating device 2c is provided with a third feeding port 2c1 and a third discharging port 2c2, and the third feeding port 2c1 is communicated with the first screen waste outlet 2b 7; the input end of the first conveying device 2d is communicated with the third discharge port 2c2 of the separating device 2c, and the output end of the first conveying device 2d is communicated with the vibrating screen feeding port 2b 5; the first fan 2a is used for outputting high-speed airflow flowing from the first vibrating screen 2b1 to the separating device 2c between the double-layer screen vibrating screen 2b and the threshing device 1; the second fan 2e is used for outputting high-speed airflow which flows from the grain outlet 2b6 to the direction of the second screen waste outlet 2b8 between the double-layer screen vibrating screen 2b and the grain conveying device 3.

Specifically, after the crop enters the threshing device 1, the threshing device 1 starts to thresh the crop, the seeds, the mixture of the seeds and the impurities, the mixture of the seeds and the seeds, the mixture of the seeds and the stems and leaves of the small stems and the light impurities of the crop fall into the vibrating screen feeding port 2b5, before the mixture falls into the vibrating screen feeding port 2b5, the first fan 2a carries out primary air separation on the mixture, the first fan 2a blows out high-speed airflow flowing from the first vibrating screen 2b1 towards the separating device 2c, the light impurities in the mixture are blown out of the threshing and cleaning device, other mixtures fall into the double-layer screen vibrating screen 2b through the vibrating screen feeding port 2b5 to carry out vibration screening, and the mixture which cannot be separated by the larger vibration screening enters the separating device 2c from the third feeding port 2c1 through the first screen waste outlet 2b7, the separated mixture enters a first conveying device 2d through a third discharge port 2c2, the separated mixture is sent to a vibrating screen feeding port 2b5 again by the first conveying device 2d to continue primary vibration screening, the mixture which successfully passes the primary vibration screening enters secondary vibration screening, the secondary vibration screening mainly separates grains and sundries in the mixture, impurities are discharged out of a threshing and cleaning device from a second screen waste outlet 2b8, the grains enter a second fan 2e from a grain outlet 2b6 to be winnowed into a grain conveying device 3, the grain conveying device 3 is the prior art, the grain conveying device 3 comprises a grain auger 3b, a sundries auger 3c and a guide plate 3a, the grain conveying device 3a is used for guiding the grains screened out of the grain guide plate 2b6 to the auger 3b, and then the grain auger 3b conveys the grains to a grain bin of the combine harvester, the sundries screw conveyor 3c is positioned below the second screen waste outlet 2b8 and is used for conveying the light impurities winnowed by the second fan 2e and the waste coming out of the second screen waste outlet 2b8 out of the threshing and cleaning device.

In order to solve the technical problem of threshing the crops twice, as shown in fig. 7-9, the following preferred technical scheme is provided:

the threshing device 1 includes a threshing cylinder 1a and a rethreshing device 1 b. The threshing cylinder 1a is provided with a first feeding port 1a1, a first finished product outlet 1a2 and a first waste material outlet 1a 3; rethreshing device 1b is located below first waste outlet 1a3, rethreshing device 1b has second inlet 1b4, second finished product outlet 1b5 and second waste outlet 1b6, and second inlet 1b4 is connected with first waste outlet 1a 3.

Specifically, the threshing cylinder 1a comprises a spiral feeding cone 1a4, a threshing cylinder shaft 1a5, a first threshing tooth 1a6, a first servo motor 1a7, a first cylinder 1a8 and a threshing sieve 1a9, the first cylinder 1a8 is horizontally arranged at the top of the combine harvester, the threshing sieve 1a9 is arranged below the first cylinder 1a8, sieve holes of the threshing sieve 1a9 form 1a2, the spiral feeding cone 1a4 and the threshing cylinder shaft 1a5 are axially arranged in the first cylinder 1a8, the spiral feeding cone 1a4 is closely connected with the threshing cylinder shaft 1a5 at the first position, the first servo motor 1a7 is arranged above the first cylinder 1a8, a conveyor belt is used for driving the cylinder shaft 1a5 and the spiral threshing cone 1a4 to rotate, a plurality of first threshing teeth 1a6 are arranged on the circumferential surface of the cylinder shaft 5 in a spiral manner, and used for moving the threshing cylinder shaft 5 a towards the tail end of the crop threshing cylinder, the top end of the first barrel body 1a8 is provided with a first feeding port 1a1, the side surface of the tail end of the first barrel body 1a8 is provided with a first waste material outlet 1a3, crops enter the threshing barrel 1a from the first feeding port 1a1, then the crops are moved to a threshing barrel shaft 1a5 by a spiral feeding cone body 1a4 to be threshed, seeds and stems of the crops are separated under the action of a first threshing tooth 1a6 and a threshing sieve 1a9, the seeds fall into the cleaning device 2 from the first product outlet 1a2, the rest stems enter the interior of the re-threshing device 1b from a second feeding port 1b4 through the first waste material outlet 1a3, secondary screening is carried out, the screened cleaning device 2 falls into the cleaning device from the second product outlet 1b5, and the last stems are sent out of the threshing device from the second waste material outlet 1b 6.

In order to solve the technical problem of how to thresh the crops for the second time, as shown in fig. 7-9, the following preferred technical solutions are provided:

the rethreshing device 1b comprises a second cylinder 1b1, a rotating roller 1b2, a rethreshing screen 1b3, a second screen waste outlet 2b8 and a second servo motor 1b 7; the second cylinder 1b1 is arranged below the first waste outlet 1a3, the axis of the second cylinder 1b1 is vertical to the axis of the first cylinder 1a8, and the circumferential surface of the second cylinder 1b1 is provided with a second feeding port 1b4 and a second waste outlet 1b6 along the axial direction; the rotary roller 1b2 is coaxially arranged in the inner cavity of the second cylinder 1b1, and the circumferential surface of the rotary roller 1b2 is provided with a plurality of second threshing teeth 1b 8; the secondary screen 1b3 is arranged on the second cylinder 1b1 and is positioned below the rotating roller 1b 2; the second servo motor 1b7 is disposed outside the second cylinder 1b1, and the second servo motor 1b7 is used for driving the rotary roller 1b2 to rotate.

Specifically, the second cylinder 1b1 is arranged below the first waste outlet 1a3, the second inlet 1b4 is communicated with the first waste outlet 1a3, the stems of the threshed crops in the threshing cylinder 1a enter the rethreshing device 1b through the second inlet 1b4, the second servo motor 1b7 drives the rotating roller 1b2 to rotate, the stems entering the rethreshing device 1b leave the rethreshing device 1b from the second crop outlet 1b5 under the action of the rotating roller 1b2, the second threshing teeth 1b8 arranged on the rotating roller 1b2 can ensure that the stems entering the rethreshing device 1b can be threshed again when passing through the rethreshing sieve 1b3, the seeds enter the cleaning device 2 through the sieve holes of the rethreshing sieve 1b3, and the grains of the rethreshing sieve 1b3 form a second crop mesh outlet 1b5, so that the multi-angle threshing effect of the crops can be achieved.

In order to solve the technical problem of how to more effectively screen crop seeds by using two layers of screens of the double-layer screen vibrating screen 2b, as shown in fig. 10-15, the following preferred technical scheme is provided:

the double-layer screen vibrating screen 2b comprises a first vibrating screen 2b1, a second vibrating screen 2b2, a screen box 2b3 and a vibrating motor 2b4 for driving the screen box 2b3 to vibrate; the top of the screen box 2b3 is provided with a vibrating screen feeding port 2b5, the vibrating screen feeding port 2b5 is positioned below the threshing device 1, the bottom of the screen box 2b3 is provided with a grain outlet 2b6, and the grain outlet 2b6 is positioned above the grain conveying device 3; a first screen waste outlet 2b7 is formed in the middle of one side of the screen box 2b3, and a second screen waste outlet 2b8 is formed in the bottom of the same side of the first screen waste outlet 2b 7; a first vibrating screen 2b1 and a second vibrating screen 2b2 are obliquely arranged in the inner cavity of the screen box 2b3, the lower end of the first vibrating screen 2b1 is connected with a first screen waste outlet 2b7, and the lower end of the second vibrating screen 2b2 is connected with a second screen waste outlet 2b 8.

Specifically, a vibrating screen inlet 2b5 is arranged at the top end of the double-layer screen vibrating screen 2b, a first vibrating screen 2b1 and a second vibrating screen 2b2 are obliquely arranged below the vibrating screen inlet 2b5, when the vibrating motor 2b4 rotates, the screen box 2b3 is driven to vibrate, the screen box 2b3 drives the first vibrating screen 2b1 and the second vibrating screen 2b2 to vibrate, so that double-layer vibrating screening is formed, crops enter the first vibrating screen 2b1 from the vibrating screen inlet 2b5 to perform vibrating screening, when screening fails, the crops leave the double-layer screen vibrating screen 2b from the first screen waste outlet 2b7 to enter the separating device 2c, screening succeeds, enters the second vibrating screen 2b2 from the screen opening of the first vibrating screen 2b1 to perform vibrating screening again on the second vibrating screen 2b2, and when screening fails, the crops leave the double-layer screen vibrating screen 2b8 from the second waste outlet 8, if the screening is successful, the grain is fed into the grain conveying device 3 from the screen opening of the second vibrating screen 2b2, and the screen opening of the second vibrating screen 2b2 also forms the grain outlet 2b 6.

In order to solve the technical problem of more stable operation of the double-layer screen vibrating screen 2b, as shown in fig. 14, the following preferred technical solutions are provided:

the double-deck screen vibrating screen 2b further includes a damper 2b9, and a plurality of dampers 2b9 are provided at the bottom of the double-deck screen vibrating screen 2 b.

Specifically, bumper shock absorber 2b9 is spring shock absorber, and the other end of bumper shock absorber and combine's leg joint, bumper shock absorber 2b9 can the effectual frequency of vibration of control double screen net shale shaker 2b to reduce vibrating motor 2b4 to the atress of sieve case 2b3, set up a plurality of bumper shock absorbers 2b9 and can disperse the atress, let double screen net shale shaker 2 b's life extension.

In order to solve the technical problem of how the double-layer screen vibrating screen 2b can completely drop the mixture threshed by the threshing device 1 into the first vibrating screen 2b1, as shown in fig. 10 to 15, the following preferred technical solutions are provided:

the working range of shaker feed inlet 2b5 includes first product outlet 1a2 and second product outlet 1b 5.

Specifically, the vibrating screen feeding port 2b5 is used for placing the grain mixture screened by the first finished product outlet 1a2 and the second finished product outlet 1b5 onto the first vibrating screen 2b1 for vibrating screening, so that the opening of the vibrating screen feeding port 2b5 needs to contain the working ranges of the first finished product outlet 1a2 and the second finished product outlet 1b5, so that waste cannot be caused, and grains are prevented from being sent out of the threshing and cleaning device without being screened.

In order to solve the technical problem of how to separate the threshed mixture, as shown in fig. 5 and 13, the following preferred technical solutions are provided:

the separating device 2c comprises a separating barrel 2c3, a separating screen 2c4, a separating shaft 2c5, a separating rod 2c6 and a third servo motor 2c 7; the circumferential surface of the separation barrel 2c3 is provided with a third feeding inlet 2c1 and a third discharging outlet 2c2, a separation shaft 2c5 is coaxially arranged inside the separation barrel 2c3, a plurality of separation rods 2c6 are arranged on the separation shaft 2c5, a third servo motor 2c7 is arranged outside the separation barrel 2c3, a third servo motor 2c7 is used for driving the separation shaft 2c5 to rotate, and a separation screen 2c4 is arranged on the third discharging outlet 2c 2.

Specifically, the separating shaft 2c5 is axially arranged in the separating barrel 2c3, the separating screen 2c4 is arranged on the separating barrel 2c3 and is located at the bottom of the separating shaft 2c5, the third servo motor 2c7 is arranged outside the separating barrel 2c3 and is used for driving the separating shaft 2c5 to rotate, the working range of the third feeding port 2c1 comprises the whole first screen waste outlet 2b7, the larger kernel mixture enters the inside of the separating barrel 2c3 from the third feeding port 2c1 through the first screen waste outlet 2b7, the kernel mixture is separated under the action of the rotating separating rod 2c6, and the separated kernel mixture enters the first transporting device 2d through the screen holes of the separating screen 2c 4.

In order to solve the technical problem of how to re-enter the separated mixture of the separation device 2c into the double-layer screen vibrating screen 2b for screening, as shown in fig. 11, 12 and 15, the following preferred technical solutions are provided:

the first transport device 2d comprises a conveyor belt 2d1, a lifting auger transport device 2d2 and a transverse auger transport device 2d 3; the conveyor belt 2d1 is arranged below the separating device 2c, and the input end of the conveyor belt 2d1 is communicated with the discharge port of the separating device 2 c; the ascending auger conveyer 2d2 is arranged at one side of the double-layer screen vibrating screen 2b, and the input end of the ascending auger conveyer 2d2 is communicated with the output end of the conveyor belt 2d 1; the transverse auger conveying device 2d3 is arranged above the double-layer screen vibrating screen 2b, the input end of the transverse auger conveying device 2d3 is communicated with the output end of the ascending auger conveying device 2d2, and the output end of the transverse auger conveying device 2d3 is communicated with a vibrating screen feeding port 2b 5.

Specifically, the first transporting device 2d is used for transporting the mixture separated by the separating device 2c to the vibrating screen feeding port 2b5, and then the mixture is sieved again by the double-layer screen vibrating screen 2 b. The separated mixture enters the conveyor belt 2d1 from the third discharge port 2c2 and is conveyed to the ascending auger conveying device 2d2 by the conveyor belt 2d1, the ascending auger conveying device 2d2 is used for ascending the separated mixture, and after the mixture ascends to the input end of the transverse auger conveying device 2d3, the mixture is conveyed to the upper part of one end, away from the separating device 2c, of the vibrating screen feeding port 2b5 by the transverse auger conveying device 2d3, and finally enters the first vibrating screen 2b1 for circular screening.

In order to solve the technical problem of how to perform the first-step air separation by the first fan 2a, as shown in fig. 3, the following preferred technical solutions are provided:

the first fan 2a is arranged at one end of the double-layer screen vibrating screen 2b far away from the separating device 2 c.

Specifically, first fan 2a sets up the one end of keeping away from separator 2c at double screen cloth shale shaker 2b, its air outlet is seen off from first shale shaker 2b1 towards the high-speed air current that separator 2c direction flows, the seed grain mixture after threshing device 1 separation can carry out the selection by winnowing once before getting into shale shaker pan feeding mouth 2b5 like this, light impurity blows off threshing cleaning plant with in the seed grain, so not only can prevent that double screen cloth shale shaker 2 b's screen cloth from appearing blockking up, can also reduce the total amount that double screen cloth shale shaker 2b needs the screening, promote double screen cloth shale shaker 2 b's screening speed, finally reach the ability of accelerating combine screening.

In order to solve the technical problem that light impurities still exist in grains falling into the grain conveying device 3, as shown in fig. 3, the following preferred technical scheme is provided:

the cleaning device 2 also comprises a second fan 2 e; the second fan 2e is arranged below the first fan 2a and is positioned between the double-layer screen vibrating screen 2b and the kernel conveying device 03.

Specifically, second fan 2e sets up in first fan 2 a's below, be located between double screen cloth shale shaker 2b and seed grain transmission device 3, second fan 2e just sets up the one end of keeping away from debris screw feeder 3c like this, the air outlet of second fan 2e blows out the high velocity draught who is gone out seed grain export 2b6 towards second screen cloth waste material export 2b8 direction, its aim at carries out the second selection by winnowing before falling into seed grain transmission device 3 with the seed grain after double screen cloth shale shaker 2b screens, be used for blowing out the light impurity that mix with in the seed grain, thereby let seed grain do not have impurity behind the grain bin that enters into combine through seed grain transmission device 3.