Grain threshing device

Abstract

The invention discloses a grain threshing device, and relates to the technical field of grain processing. Comprising a support, a screen drum, a threshing roller, a discharging mechanism and a clamping mechanism, a collecting box is arranged at one end of the support, the end, away from the collecting box, of a grain threshing device is the feeding end of the grain threshing device, and the discharging mechanism and the clamping mechanism are sequentially arranged in the feeding movement direction of the grain threshing device. Through the arrangement of the discharging mechanism, the clamping mechanism and the like, grains only need to be placed on the discharging mechanism in the using process, follow-up grain ear separation and stalk collection are automatically completed, and when batch grain threshing work is conducted, the device is more efficient compared with traditional semi-feeding type threshing equipment, and the grain threshing efficiency is improved. Through cooperation of the threshing roller and the screen drum and the design of the notches penetrating through the two ends of the screen drum, the grain ears can make full contact with the threshing roller in the threshing process.

Description

Technical Field

[0001] The present invention relates to the technical field of grain processing, and particularly to a grain threshing device. Background Art

[0002] Grain threshing equipment is equipment for separating ears of grain from stalks. Commonly used ones include combine harvesters and semi-feed drum threshers. Combine harvesters have a fast threshing speed but are suitable for plain areas. For mountainous areas, many still collect the grain and then use a semi-feed drum thresher to strip the ears of grain. The efficiency of semi-feed drum threshers is relatively low, and it is necessary to judge the threshing effect of the ears of grain through artificial vision. For a large demand for threshing ears of grain, this method is still relatively labor-consuming. In view of this situation, the present invention proposes a new solution. Summary of the Invention

[0003] The purpose of the present invention is to provide a grain threshing device to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A grain threshing device, comprising:

[0005] A bracket, a sieve cylinder, a threshing roller, a feeding mechanism, and a clamping mechanism;

[0006] One end of the bracket is provided with a receiving box. The end of the grain threshing device away from the receiving box is the feeding end of the grain threshing device. The feeding mechanism and the clamping mechanism are arranged in sequence along the feeding movement direction of the device. A notch penetrating through both ends of the sieve cylinder is provided on the sieve cylinder, and a channel for the movement of grains is formed at the notch. The feeding mechanism and the clamping mechanism are both arranged on one side of the sieve cylinder and are directly opposite to the channel formed by the notch;

[0007] The feeding mechanism includes a first conveyor belt, a second conveyor belt, and a third conveyor belt. The first conveyor belt, the second conveyor belt, and the third conveyor belt are arranged side by side, and the belt conveying directions of the first conveyor belt, the second conveyor belt, and the third conveyor belt are all arranged along the advancing direction of the grains. A gap is provided between the first conveyor belt and the second conveyor belt. The area between the first conveyor belt and the gap is the placement area for the stalk parts of the grains. The area formed between the second conveyor belt and the third conveyor belt is the placement area for the ear parts of the grains;

[0008] The clamping mechanism includes a first conveyor belt and a second conveyor belt. The first conveyor belt and the second conveyor belt are arranged oppositely up and down, and the feeding ends of the first conveyor belt and the second conveyor belt are located at the gap between the first conveyor belt and the second conveyor belt.

[0009] Regarding this solution, further, the threshing roller is located inside the sieve cylinder and rotates inside the sieve cylinder. A number of support plates are installed on the bracket. The sieve cylinder is installed at the bracket through the support plates. A connecting plate is installed at the bracket near the feeding end. One end of the threshing roller is fixed with a connecting shaft, and the other end of the connecting shaft is rotatably installed on one side of the connecting plate. A second driving source for driving the rotation of the connecting shaft is also provided on the connecting plate.

[0010] Regarding this solution, further, the tops of the belts of the first conveyor belt, the second conveyor belt, and the third conveyor belt are all higher than the maximum height of the conveyor belt frame.

[0011] Regarding this solution, further, a connecting mechanism is provided at the first conveyor belt and the second conveyor belt near the clamping mechanism. The connecting mechanism includes two side plates. One side of the two side plates facing the feeding end of the bracket is inclined upward. Three conveying shafts are rotatably installed between the two side plates. Two of the conveying shafts are rotatably installed between the two ends of the two side plates, and the other conveying shaft is installed between the corners of the two side plates in the same way. The three conveying shafts are connected by a transmission belt, and a scraper is also provided on the surface of the transmission belt.

[0012] Regarding this solution, further, the connecting mechanism further includes two first gears. One of the first gears is installed on the conveyor belt frame of the first conveyor belt and is coaxially fixed with the roller of the first conveyor belt. The other first gear is fixed to one side of the conveying shaft of the connecting mechanism near the clamping mechanism through a shaft rod. A second gear is also rotatably installed on the conveyor belt frame. Two rows of teeth are provided on the second gear. The second gear is respectively connected to the two first gears by chains. The two conveying shafts of the first conveyor belt and the second conveyor belt away from the clamping mechanism are connected by a synchronizing shaft.

[0013] Regarding this solution, further, a fixing plate is also installed at the conveyor belt frame of the first conveyor belt. An arc groove is formed on the fixing plate. A connecting rod is fixed to one side of one of the side plates. The connecting rod passes through the arc groove. Threads are also provided on the surface of the connecting rod. A screwing plate is screwed to the connecting rod through the threads. A positioning bolt is also screwed to the screwing plate. The center of the arc groove coincides with the center of the second gear.

[0014] Regarding this solution, further, the roller at one end of the second conveyor belt near the discharging mechanism is coaxially fixed with the rollers of the first conveyor belt, the second conveyor belt, and the third conveyor belt near the second conveyor belt. A fixing frame is fixed to one end of the bracket near the feeding side of the device. The fixing frame is also fixed to the conveyor belt frames of the first conveyor belt and the second conveyor belt.

[0015] Regarding this solution, further, at least two arm rods are fixed to the bracket. The tops of the two arm rods are vertically arranged. A connecting arm is slidably connected to the vertical part of the arm rod. The other end of the connecting arm is fixed to the conveyor belt frame of the first conveyor belt. A fixing bolt is screwed to the connecting arm sleeved on the arm rod to fix the position of the connecting arm.

[0016] Regarding this solution, further, a discharge hopper is installed below the sieve cylinder in the middle of the bracket. An inlet is provided on the receiving box facing the clamping mechanism. The width of the inlet is at least greater than the maximum length of conveyor belt 1 to conveyor belt 3, and the height of the inlet is at least greater than the maximum thickness of conveyor belt 1 to conveyor belt 2. An outlet is provided on the side of the receiving box away from the inlet.

[0017] Regarding this solution, further, the discharge hopper, sieve cylinder, threshing roller, feeding mechanism, and clamping mechanism are all inclined towards the feeding end of the device, with an inclination angle of 0° - 5°.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] Through the settings of the feeding mechanism and the clamping mechanism, etc., in the process of using this grain threshing device, it only needs to place the grains on the feeding mechanism, and subsequent separation of the ear and collection of the stalk are automatically completed. When carrying out batch grain threshing work, the efficiency of this device is higher than that of traditional semi-feed threshing equipment. The cooperation between the threshing roller and the sieve cylinder, as well as the notch design penetrating both ends on the sieve cylinder, enable the ear to fully contact the threshing roller during the threshing process. Coupled with the fact that the ear faces the threshing roller during the conveying process of the grains and continuously passes through the threshing roller for threshing, the threshing quality is high and there is no need for frequent manual supervision.

[0020] At the same time, the specific gap settings of conveyor belt 1, conveyor belt 2, and conveyor belt 3 of the feeding mechanism, as well as the adjustability of the gap between conveyor belt 1 and conveyor belt 2 of the clamping mechanism, can adapt to grains of different sizes and lengths. Whether the ear is longer or shorter, the grains can be stably clamped and threshed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is the split structural schematic diagram of the present invention;

[0023] Figure 3 is the structural schematic diagram from the feeding perspective of the present invention;

[0024] Figure 4 is the structural schematic diagram of the feeding mechanism and the clamping mechanism of the present invention;

[0025] Figure 5 is of the present invention Figure 4 amplified structural schematic diagram of the connecting mechanism;

[0026] Figure 6 is the structural schematic diagram of the sieve cylinder of the present invention.

[0027] In the figure: 1. Support; 2. Sieve cylinder; 201. Notch; 3. Support plate; 4. Threshing roller; 5. Connecting plate; 6. Connecting shaft; 7. Feeding mechanism; 701. Conveyor belt 1; 702. Conveyor belt 2; 703. Conveyor belt 3; 704. Fixed frame; 705. Driving source 1; 8. Clamping material mechanism; 801. Conveyor belt 1; 802. Conveyor belt 2; 803. Arm rod; 804. Connecting arm; 805. Fixed bolt; 9. Connecting mechanism; 901. Side plate; 902. Conveyor shaft; 903. Transmission belt; 9031. Scraper; 904. Synchronous shaft; 905. Fixed plate; 9051. Arc groove; 906. Connecting rod; 907. Screwed plate; 908. Positioning bolt; 909. Gear 1; 910. Gear 2; 911. Gear 3; 10. Receiving box; 101. Feeding port; 102. Outlet; 11. Discharge hopper; 12. Driving source 2. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figure 1 and Figure 2 shown, the present invention provides a technical solution: a grain threshing device, including a support 1, a sieve cylinder 2, a threshing roller 4, a feeding mechanism 7, and a clamping material mechanism 8;

[0030] The threshing roller 4 is located inside the sieve cylinder 2 and rotates inside the sieve cylinder 2. The sieve cylinder 2 is installed on the support 1. The threshing roller 4 and the sieve cylinder 2 form a threshing structure. This threshing structure is the same as the common threshing methods on the market. It uses the threshing teeth or protrusions on the threshing roller 4 to strike and squeeze the grains, so that the grains are separated from the straws. It is one of the most widely used threshing methods, with advantages such as high threshing efficiency and low breakage rate. When the device is in use, the grains are placed on the feeding mechanism 7. The feeding mechanism 7 conveys the grains towards the clamping material mechanism 8, and during the conveying process, the grains are separated from the straws through the cooperation of the threshing roller 4 and the sieve cylinder 2. After separation, the grains are screened out and the straws are automatically collected.

[0031] Combined with Figure 2 and Figure 6, to ensure the smooth implementation of the above embodiments, it should be understood that a number of support plates 3 are installed on the support 1, the screening cylinder 2 is installed at the support 1 through the support plates 3, a receiving box 10 is installed at one end of the support 1, the end of the threshing device far from the receiving box 10 is the feeding end of the device, a connecting plate 5 is installed at the support 1 near the feeding end, one end of the threshing roller 4 is fixed with a connecting shaft 6, the other end of the connecting shaft 6 is rotatably installed on one side of the connecting plate 5, and a second driving source 12 for driving the connecting shaft 6 to rotate is further provided on the connecting plate 5. Among them, the feeding mechanism 7 and the clamping mechanism 8 are arranged in sequence along the feeding movement direction of the device. A notch 201 penetrating both ends of the screening cylinder 2 is provided on the screening cylinder 2, and a channel for the movement of grains is formed at the notch 201. The feeding mechanism 7 and the clamping mechanism 8 are both arranged on one side of the screening cylinder 2 and are opposite to the channel formed by the notch 201.

[0032] As Figure 2As shown in the figure, to ensure the smooth implementation of the above embodiments, it should be understood that the feeding mechanism 7 includes a first conveyor belt 701, a second conveyor belt 702, and a third conveyor belt 703. The first conveyor belt 701, the second conveyor belt 702, and the third conveyor belt 703 are each composed of two rollers and a belt, which is a common conveyor belt structure on the market. It should be understood that the tops of the belts of the first conveyor belt 701, the second conveyor belt 702, and the third conveyor belt 703 are all higher than the maximum height of the conveyor belt frame. In other words, when the first conveyor belt 701, the second conveyor belt 702, and the third conveyor belt 703 of this embodiment are used for material transportation, if the length of the material is greater than the width of the conveyor belt, then whether the material is placed on the conveyor belt along the conveying direction of the conveyor belt or perpendicular to the conveying direction of the conveyor belt, the belt parts of the first conveyor belt 701, the second conveyor belt 702, and the third conveyor belt 703 can directly contact the material and transport it. The first conveyor belt 701, the second conveyor belt 702, and the third conveyor belt 703 are arranged side by side, and the conveying directions of the three conveyor belts are all set along the advancing direction of the grains. Among them, a gap of 20 cm - 40 cm is provided between the first conveyor belt 701 and the second conveyor belt 702. The first conveyor belt 701 and the gap are the placement areas for the stalk parts of the grains. A gap of 2 cm - 5 cm is provided between the second conveyor belt 702 and the third conveyor belt 703. The second conveyor belt 702 and the third conveyor belt 703 form the placement area for the ear parts of the grains. That is to say, when the device is in use, the grains need to be placed horizontally on the first conveyor belt 701, the second conveyor belt 702, and the third conveyor belt 703. The stalk parts of the grains are located on the first conveyor belt 701 and the gap, and the ear parts of the grains are placed on the second conveyor belt 702 and the third conveyor belt 703. In this way, automatic transportation of the grains can be achieved, and during the transportation process, the ears can be oriented towards the threshing roller 4 to prepare for the threshing action. A driving source 705 is installed on the conveyor belt frame of the first conveyor belt 701, and the driving source 705 is connected to one of the rotating shafts of the first conveyor belt 701 to drive the first conveyor belt 701 to move.

[0033] As Figure 3 shown, regarding the above solution, it is worth noting that when observed in the feeding direction, both the second conveyor belt 702 and the third conveyor belt 703 are located inside the sieve cylinder 2. That is to say, when the grains are continuously transported, the ear parts of the grains can be stripped from the stalks of the grains by the action of the threshing roller 4. However, since the grains are placed on the conveyor belt, when the grains come into contact with the threshing roller 4, the grains will fall off the conveyor belt due to insufficient restraint.

[0034] As Figure 4As shown in the figure, to ensure the normal implementation of the above embodiments, it should be understood that the clamping and feeding mechanism 8 includes a first conveyor belt 801 and a second conveyor belt 802. The first conveyor belt 801 and the second conveyor belt 802 are also composed of two rollers and a belt. The difference is that the first conveyor belt 801 and the second conveyor belt 802 are arranged oppositely up and down. That is to say, the belt parts of the first conveyor belt 801 and the second conveyor belt 802 are adjacent up and down, and the first conveyor belt 801 can be adjusted in the vertical direction. That is to say, the gap between the first conveyor belt 801 and the second conveyor belt 802 can be adjusted. After the gap between the first conveyor belt 801 and the second conveyor belt 802 is adjusted to an appropriate distance, placing materials between the first conveyor belt 801 and the second conveyor belt 802 can achieve clamping and conveying. At this time, it is only necessary to ensure that the moving speeds of the first conveyor belt 801 and the second conveyor belt 802 are consistent. Therefore, when the grain is located between the first conveyor belt 801 and the second conveyor belt 802, the grain can be conveyed to one end of the receiving box 10 through the action of the two conveyor belts;

[0035] As Figure 4 shown in the figure, to ensure that the grain can be smoothly transferred from the feeding mechanism 7 to the clamping and feeding mechanism 8, the widths of the first conveyor belt 801 and the second conveyor belt 802 should be at least smaller than the gap between the first conveyor belt 701 and the second conveyor belt 702, and the feeding ends of the first conveyor belt 801 and the second conveyor belt 802 are located at the gap, which is convenient for the grain to be transferred. In this case, after the grain is placed on the feeding mechanism 7, the grain is conveyed from the feeding mechanism 7 to the clamping and feeding mechanism 8. Since the widths of the first conveyor belt 801 and the second conveyor belt 802 are smaller than the gap, when the clamping and feeding mechanism 8 clamps the grain, it should clamp the stalk part of the grain, so that the grain can be conveyed to the receiving box 10 and the ears of the grain can be threshed during the conveying process.

[0036] It should be understood that since the clamping and feeding mechanism 8 needs to stably clamp the grain during the conveying process, the gap between the first conveyor belt 801 and the second conveyor belt 802 needs to be small enough. In this case, when the grain on the feeding mechanism 7 is transferred to the clamping and feeding mechanism 8, a certain external force is required to guide it, and it is necessary to avoid the situation where the grain cannot be clamped due to the too small gap between the first conveyor belt 801 and the second conveyor belt 802. To avoid the above situation, the feeding mechanism 7 and the clamping and feeding mechanism 8 are connected by a connecting mechanism 9, and the connecting mechanism 9 is used to ensure that the grain can be smoothly clamped and conveyed by the clamping and feeding mechanism 8.

[0037] As Figure 4 and Figure 5As shown in the figure, to ensure the smooth implementation of the above embodiments, at least two connecting mechanisms 9 are provided, or at least one is provided on each of the conveyor belt one 701 and the conveyor belt two 702 near the clamping material mechanism 8. The connecting mechanism 9 includes two side plates 901. One side of the two side plates 901 facing the feeding end of the device is inclined upward. That is to say, there is a corner of the side plate 901. Three conveying shafts 902 are rotatably installed between the two side plates 901. Two of the conveying shafts 902 are rotatably installed between the two ends of the two side plates 901, and the other conveying shaft 902 is installed between the corners of the two side plates 901 in the same way. The three conveying shafts 902 are connected by a transmission belt 903, and a scraper 9031 is also provided on the surface of the transmission belt 903. Under this structural design, a moving clamping structure is also formed between the bottom of the transmission belt 903 and the belt of the conveyor belt one 701 or the conveyor belt two 702. Only by appropriately adjusting the distance between the connecting mechanism 9 and the conveyor belt can a clamping effect be formed. In this case, the grains can be stuffed into the clamping material mechanism 8 through the cooperation of the connecting mechanism 9 and the discharging mechanism 7. The side of the connecting mechanism 9 facing the grains is inclined, which can cooperate with the scraper 9031 to scrape the grains into the space between the connecting mechanism 9 and the discharging mechanism 7. In this way, the situation where the grains cannot be stuffed into the clamping material mechanism 8 can be avoided. It should be noted that the two conveying shafts 902 of the two connecting mechanisms 9 closer to the grains are connected by a synchronizing shaft 904 to ensure the same movement speed between the two conveying shafts 902 on both sides.

[0038] As Figure 5 shown in the figure, it still needs to be noted that the connecting mechanism 9 further includes a gear one 909, a gear two 910 and a gear three 911. The gear one 909 is rotatably installed on one side of the conveyor belt frame and is coaxially fixed with the roller of the conveyor belt one 701. The gear two 910 is coaxially fixed with one of the conveying shafts 902 of the connecting mechanism 9 through a shaft rod. The gear three 911 is meshed with the gear one 909 and the gear two 910. The gear three 911 is rotatably installed on one side of the conveyor belt frame. And since the bottom surface of the transmission belt 903 is adjacent to the top of the belt, it can be ensured that the movement direction of the bottom of the transmission belt 903 is the same as the movement direction of the top of the belt. That is to say, the two can cooperate to stuff the grains into the clamping material mechanism 8.

[0039] A fixed plate 905 is also installed at the conveyor belt frame of the first conveyor belt 701. An arc groove 9051 is formed in the fixed plate 905. A connecting rod 906 is fixed to one side of one of the side plates 901. The connecting rod 906 passes through the arc groove 9051. Threads are also provided on the surface of the connecting rod 906. A screwing plate 907 is screwed to the connecting rod 906 through the threads. A positioning bolt 908 is also screwed to the screwing plate 907. The positioning bolt 908 abuts against the surface of the fixed plate 905. It should be particularly noted that the center of the arc groove 9051 coincides with the center of the second gear 910. That is to say, the connecting mechanism 9 (the side plate 901, the conveying shaft 902 and the conveyor belt 903 part) can be adjusted. By appropriately moving the connecting mechanism 9, the opening on the side facing the grain can be widened to facilitate the feeding of the grain.

[0040] As Figure 4 and Figure 5 shown, it should also be noted that the roller at one end of the second conveyor belt 802 close to the discharging mechanism 7 is coaxially fixed with the rollers of the first conveyor belt 701, the second conveyor belt 702 and the third conveyor belt 703 close to the second conveyor belt 802. That is to say, the conveying speeds and directions of the first conveyor belt 701, the second conveyor belt 702 and the third conveyor belt 703 are kept consistent, and the coordination is better.

[0041] A fixing frame 704 is fixed to one end of the bracket 1 close to the feeding side of the device. The fixing frame 704 is also fixed to the conveyor belt frames of the first conveyor belt 701 and the second conveyor belt 702 to maintain the stability of the discharging mechanism 7.

[0042] As Figures 1 to 3 shown, to facilitate the adjustment of the clamping gap of the clamping mechanism 8, at least two arm rods 803 are fixed to the bracket 1. The tops of the two arm rods 803 are vertically arranged. A connecting arm 804 is slidably connected to the vertical part of the arm rod 803. The other end of the connecting arm 804 is fixed to the conveyor belt frame of the first conveyor belt 801. One end of the connecting arm 804 is sleeved and slid on the arm rod 803. A fixing bolt 805 is screwed at the place where the connecting arm 804 is sleeved on the arm rod 803 to fix the position of the connecting arm 804. The height position of the first conveyor belt 801 can also be adjusted by screwing the fixing bolt 805.

[0043] In summary, the device is a new type of grain threshing device, which can be used for threshing grains such as wheat, rice and sorghum. Taking rice as an example, during use, the rice is continuously laid on the discharge mechanism 7. It should be noted that the main stem part of the rice needs to be located in the gap between the conveyor belt 1 701 and the conveyor belt 1 701 and the conveyor belt 2 702, and the rice ear part is located on the conveyor belt 2 702 and the conveyor belt 3 703. During the continued transportation, the connecting mechanism 9 continuously stuffs the rice into the clamping mechanism 8, and the clamping mechanism 8 can clamp the stem part of the rice for transportation. During the transportation process, the rice ears are peeled off by the cooperation of the threshing roller 4 and the screen drum 2. In the middle of the bracket 1, a discharge hopper 11 is installed below the screen drum 2, and the rice ears are discharged through the discharge hopper 11. In order to ensure the discharging effect of the discharge hopper 11, it is worth noting that the discharge hopper 11, the screen drum 2, the threshing roller 4, the discharge mechanism 7 and the clamping mechanism 8 are all inclined toward the feeding end of the device, with an inclination angle of 0°-5°. In order to facilitate the separation of the ears of rice from the stalks and speed up the discharge of the ears of rice, a vibrator can be installed at the discharge hopper 11 to speed up the discharge of the rice ears. After the rice is threshed, the stalks enter the material receiving box 10. The material receiving box 10 is provided with a feed port 101 facing the clamping mechanism 8. The width of the feed port 101 is at least greater than the maximum length of the conveyor belt 701 to the conveyor belt 703, and the height of the feed port 101 is at least greater than the maximum thickness of the conveyor belt 801 to the conveyor belt 802. An outlet 102 is provided on the side of the material receiving box 10 away from the feed port 101 to facilitate picking up the stalks.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A grain threshing device, characterized in that: include: A support (1), a screen drum (2), a threshing roller (4), a material discharge mechanism (7) and a material clamping mechanism (8); A material receiving box (10) is provided at one end of the bracket (1); an end of the grain threshing device away from the material receiving box (10) is a feeding end of the grain threshing device; a material discharge mechanism (7) and a material clamping mechanism (8) are arranged in sequence along the feeding movement direction of the device; a notch (201) is provided on the screen cylinder (2) and passes through both ends of the screen cylinder (2); a passage for grain movement is formed at the notch (201); the material discharge mechanism (7) and the material clamping mechanism (8) are both arranged on one side of the screen cylinder (2) and directly opposite to the passage formed by the notch (201); The unloading mechanism (7) comprises a conveyor belt 1 (701), a conveyor belt 2 (702) and a conveyor belt 3 (703), wherein the conveyor belt 1 (701), the conveyor belt 2 (702) and the conveyor belt 3 (703) are arranged in a row, and the belt conveying directions of the conveyor belt 1 (701), the conveyor belt 2 (702) and the conveyor belt 3 (703) are arranged along the traveling direction of the grains, a gap is arranged between the conveyor belt 1 (701) and the conveyor belt 2 (702), the conveyor belt 1 (701) and the gap are the placement areas for the grain stalks, and the conveyor belt 2 (702) and the conveyor belt 3 (703) form the placement areas for the grain ears; The material clamping mechanism (8) comprises a conveyor belt 1 (801) and a conveyor belt 2 (802), wherein the conveyor belt 1 (801) and the conveyor belt 2 (802) are arranged opposite to each other in the upper and lower directions, and one end of the conveyor belt 1 (801) and the conveyor belt 2 (802) for feeding materials is located in the gap between the conveyor belt 1 (701) and the conveyor belt 2 (702).

2. A grain threshing device according to claim 1, characterized in that: The threshing roller (4) is located in the screen drum (2) and rotates in the screen drum (2); a plurality of support plates (3) are installed on the bracket (1); the screen drum (2) is installed on the bracket (1) through the support plates (3); a connecting plate (5) is installed near the feed end of the bracket (1); a connecting shaft (6) is fixed to one end of the threshing roller (4); the other end of the connecting shaft (6) is rotatably installed on one side of the connecting plate (5); and a driving source (12) for driving the connecting shaft (6) to rotate is also provided on the connecting plate (5).

3. A grain threshing device according to claim 1, characterized in that: The tops of the conveyor belts 1 (701), 2 (702) and 3 (703) are all higher than the maximum height of the conveyor belt frame.

4. A grain threshing device according to claim 1, characterized in that: The conveyor belt 1 (701) and the conveyor belt 2 (702) are provided with a connecting mechanism (9) near the clamping mechanism (8), and the connecting mechanism (9) includes two side plates (901), and the two side plates (901) are both inclined upwards on the side facing the feeding end of the bracket (1), and three conveying shafts (902) are rotatably installed between the two side plates (901), wherein two conveying shafts (902) are rotatably installed between the two ends of the two side plates (901), and another conveying shaft (902) is installed between the corners of the two side plates (901) in the same way, and the three conveying shafts (902) are connected by a transmission belt (903), and a scraper (9031) is also provided on the surface of the transmission belt (903).

5. A grain threshing device according to claim 4, characterized in that: The connecting mechanism (9) further comprises gear 1 (909), gear 2 (910) and gear 3 (911); gear 1 (909) is rotatably mounted on one side of the conveyor frame and is coaxially fixed with the roller of conveyor 1 (701); gear 2 (910) is coaxially fixed with one of the conveying shafts (902) of the connecting mechanism (9) via an axle rod; gear 3 (911) is meshingly connected with gear 1 (909) and gear 2 (910); gear 3 (911) is rotatably mounted on one side of the conveyor frame; two conveying shafts (902) on conveyor 1 (701) and conveyor 2 (702) away from the clamping mechanism (8) are connected via a synchronizing shaft (904).

6. A grain threshing device according to claim 4, characterized in that: A fixing plate (905) is also installed at the conveyor frame of the conveyor belt 1 (701), and a circular arc groove (9051) is opened on the fixing plate (905); a connecting rod (906) is fixed on one side of one of the side plates (901), and the connecting rod (906) passes through the circular arc groove (9051). The surface of the connecting rod (906) is also provided with a thread, and the connecting rod (906) is screwed to a screw plate (907) through the thread, and a positioning bolt (908) is also screwed to the screw plate (907), and the center of the circular arc groove (9051) is consistent with the center of the gear 2 (910).

7. A grain threshing device according to claim 1, characterized in that: The roller of the conveyor belt 2 (802) at one end close to the discharge mechanism (7) is coaxially fixed with the rollers of the conveyor belt 1 (701), the conveyor belt 2 (702) and the conveyor belt 3 (703) close to the conveyor belt 2 (802); a fixing frame (704) is fixed to one end of the bracket (1) close to the feeding side of the device; the fixing frame (704) is also fixed to the conveyor belt frames of the conveyor belt 1 (701) and the conveyor belt 2 (702).

8. A grain threshing device according to claim 1, characterized in that: At least two arm rods (803) are fixed on the bracket (1), the top ends of the two arm rods (803) are vertically arranged, the vertical parts of the arm rods (803) are slidably connected to a connecting arm (804), the other end of the connecting arm (804) is fixed to the conveyor belt frame of the conveyor belt 1 (801), and the connecting arm (804) is sleeved on the arm rod (803) and is screwed with a fixing bolt (805) for fixing the position of the connecting arm (804).

9. A grain threshing device according to claim 1, characterized in that: A discharge hopper (11) is installed in the middle of the support (1) below the screen drum (2), and a feed port (101) is provided on the receiving box (10) facing the clamping material mechanism (8). The width of the feed port (101) is at least greater than the maximum length of conveyor belt one (701) to conveyor belt three (703), and the height of the feed port (101) is at least greater than the maximum thickness of conveyor belt one (801) to conveyor belt two (802). An outlet (102) is provided on the side of the receiving box (10) away from the feed port (101).

10. A grain threshing device according to claim 1, characterized in that: The discharge hopper (11), the screen drum (2), the threshing roller (4), the material discharge mechanism (7) and the material clamping mechanism (8) are all arranged to be inclined toward the feeding end of the device, with an inclination angle of 0°-5°.

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