Grain threshing machine

Abstract

The utility model relates to a grain threshing machine, and belongs to the technical field of agricultural machinery. The threshing machine comprises a machine frame, a threshing shell is arranged on the machine frame, a threshing mechanism is arranged in the threshing shell, a collecting auger is arranged on the portion, below the threshing mechanism, of the threshing shell, and the collecting auger is connected with a sorting box. The threshing mechanism is connected with an impurity removal fan, and an inlet of the impurity removal fan is communicated with the top of the sorting box; a driving motor is arranged on the machine frame and connected with the collecting auger and the threshing mechanism. According to the thresher, after grains are threshed by the threshing mechanism, the impurity removal fan is matched with the sorting box for sorting, impurities with light mass are sucked away and discharged through negative pressure, grains with heavy mass are directly discharged through the sorting box, and the grains and the impurities are screened through winnowing and cannot directly collide with the grains, so that the completeness of the grains can be effectively guaranteed, and the working efficiency of the thresher is improved. The germination rate of threshed grains is improved. The problem that an existing thresher directly collides with grains, and consequently the grains are prone to being damaged is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of grain thresher, belong to agricultural machinery technical field. BACKGROUND

[0002] When planting grain (rice, wheat, etc.) in hilly or mountainous area, due to high-low difference, field is often irregular, and field is small;Or in breeding, small area planting, it is inconvenient to use harvester to harvest. Grain needs to be threshed after harvesting, and the grain is separated from the straw. During threshing, stone mill is generally used for rolling and threshing, or a threshing machine is used for threshing.

[0003] Patent application with publication number CN 218736073U discloses an improved full feeding type thresher, which comprises a rack, a threshing bin, a hopper one, a fan, a grain outlet device, the threshing bin, the hopper one, the fan and the grain outlet device are all arranged on the rack, the improved full feeding type thresher further comprises at least one vibrating screen arranged on the rack, the vibrating screen is arranged below the hopper one, a hopper two is arranged below the vibrating screen, and the discharge port of the hopper two is communicated with the inner cavity space of the fan. The improved full feeding type thresher adopts a full-enclosing full-feeding structure, which reduces the waste of grain splashing and avoids the danger of debris falling on the body. The vibrating screen is provided with an eccentric shaft mechanism, which can throw the straw outwards and discharge it in a reciprocating vibration and oblique upward throwing manner. The waste of grain is further reduced.

[0004] The above-mentioned thresher can thresh grain and remove impurities through the vibrating screen, but it throws the grain out through the grain lifting blades during the grain outlet stage. The high-speed rotating grain lifting blades directly collide with the grain, which can easily cause the grain to be damaged. Especially for breeding grain, the seed cannot germinate after being collided by the grain lifting blades. Therefore, it is necessary to redesign a grain thresher to solve the above-mentioned problems. SUMMARY

[0005] The utility model aims at providing a kind of grain thresher that can remove impurities after threshing and protect grain from being damaged.

[0006] The technical scheme of the utility model is as follows:

[0007] A kind of grain thresher, it is by rack, threshing shell, threshing mechanism, collection auger, sorting box, impurity removal fan and drive motor composition, its characterized in that: rack is provided with threshing shell, threshing shell is provided with threshing mechanism, threshing mechanism below the threshing shell is provided with collection auger, one end of collection auger is connected with sorting box through conveying pipe, and the bottom of sorting box is provided with grain outlet;Threshing mechanism is connected with impurity removal fan, and the inlet of impurity removal fan is communicated with the top of sorting box;Drive motor is arranged on the rack below the threshing shell, and drive motor is connected with the other end of collection auger and threshing mechanism through belt pulley and belt.

[0008] The threshing mechanism consists of a threshing shaft, a threshing roller, and a threshing grid. The threshing roller is installed on the threshing shaft inside the threshing housing, and the threshing grid is installed inside the threshing housing between the threshing roller and the collecting auger. The threshing shaft is movably connected to the threshing housing through a bearing seat. One end of the threshing shaft is connected to the impeller of the impurity removal fan, and the other end of the threshing shaft is connected to the drive motor through a belt and a pulley.

[0009] The threshing shell on one side of the threshing roller is provided with a feed inlet and a discharge trough; the threshing shell on the other side of the threshing roller is provided with a straw outlet and a guide cover.

[0010] The threshing roller is evenly distributed with threshing teeth, which are inclined and crescent-shaped.

[0011] The beneficial effects of this utility model are as follows:

[0012] This grain thresher, after threshing the grain in its threshing mechanism, uses a dust removal fan in conjunction with a sorting box to separate the grains. Lighter impurities are sucked away and discharged using negative pressure, while heavier grains are discharged directly from the sorting box. Because the grains and impurities are separated by air separation, there is no direct collision with the grains, effectively ensuring the integrity of the grains and improving the germination rate of the threshed grains. This solves the problem of direct collision between the grains and impurities in existing threshers, which easily leads to grain breakage. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the present invention;

[0014] Figure 2 This is a rear view schematic diagram of the present invention;

[0015] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0016] Figure 4 yes Figure 1 Schematic diagram of the structure in the AA direction;

[0017] Figure 5 This is a schematic diagram of the structure of the threshing roller of this utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the threshing tooth of this utility model.

[0019] In the diagram: 1. Frame, 2. Threshing shell, 3. Collecting auger, 4. Sorting box, 5. Impurity removal fan, 6. Drive motor, 7. Conveying pipe, 8. Grain outlet, 9. Threshing shaft, 10. Threshing roller, 11. Threshing grid, 12. Feed chute, 13. Guide cover, 14. Threshing teeth, 15. Slag discharge pipe. DETAILED DESCRIPTION

[0020] The grain thresher is composed of a frame 1, a threshing shell 2, a threshing mechanism, a collecting auger 3, a sorting box 4, a dirt-removing fan 5 and a driving motor 6. The threshing shell 2 is arranged on the frame 1, and the threshing mechanism is arranged in the threshing shell 2 to thresh the grain from the straw. The collecting auger 3 is arranged on the threshing shell 2 below the threshing mechanism, and one end of the collecting auger 3 is connected with the sorting box 4 through a conveying pipe 7, and the bottom of the sorting box 4 is provided with a grain outlet 8. The dirt-removing fan 5 is connected with the threshing mechanism, the inlet of the dirt-removing fan 5 is communicated with the top of the sorting box 4, and the outlet of the dirt-removing fan 5 is connected with a residue discharging pipe 15. The driving motor 6 is arranged on the frame 1 below the threshing shell 2, and the driving motor 6 is connected with the other end of the collecting auger 3 and the threshing mechanism through a belt and a belt pulley. The function of the collecting auger 3 is to gather the threshed grain to the one end of the collecting auger 3 through the collecting auger 3, so as to convey the grain into the sorting box 4. The function of the dirt-removing fan 5 is to form an air flow in the sorting box 4 through the dirt-removing fan 5, so as to separate the grain and the impurities (such as broken leaves, dust, shriveled grain and the like produced in the threshing process) by blowing the different quality objects through the air flow, and the impurities are sucked into the dirt-removing fan 5 and then discharged through the residue discharging pipe 15, and the grain is discharged through the grain outlet under the action of gravity, so as to prevent the impurities and the grain from directly colliding with each other in the process of removing the impurities and discharging the grain, and effectively protect the grain to keep it intact and improve the germination rate.

[0021] The threshing mechanism is composed of a threshing shaft 9, a threshing roller 10 and a threshing grid 11. The threshing roller 10 is arranged on the threshing shaft 9 in the threshing shell 2, and the threshing grid 11 is arranged in the threshing shell 2 between the threshing roller 10 and the collecting auger 3. The threshing shaft 9 is movably connected with the threshing shell 2 through a bearing seat. One end of the threshing shaft 9 is connected with the impeller of the dirt-removing fan 5, and the other end of the threshing shaft 9 is connected with the driving motor 6 through a belt and a belt pulley. The function of the threshing roller 10 is to thresh the grain from the straw through the cooperation of the threshing roller 10 and the threshing grid 11. The rotating threshing roller 10 drives the straw to move forward to discharge the straw. Specifically, when the grain enters, the grain enters the threshing grid 11 due to its large weight, and the straw is difficult to enter the threshing grid 11 due to its roughness and length. When the threshing roller 10 drives the straw to move forward, the threshing grid 11 blocks the movement of the grain, so as to form a pulling force between the grain and the straw to separate the grain from the straw. At the same time, the threshing roller 10 and the threshing grid 11 can directly extrude the grain. Since the surface of the grain is arc-shaped, the grain is easy to slide transversely when being extruded, so as to separate the grain from the straw.

[0022] The threshing shell 2 on one side of the threshing roller 10 is provided with a feeding port, and the feeding port is provided with a discharging chute 12 to facilitate the spreading and uniform feeding of the straw through the discharging chute 12. The threshing shell 2 on the other side of the threshing roller 10 is provided with a straw outlet, and the straw outlet is provided with a guide cover 13 to guide the throwing of the straw and constrain the straw to avoid flying randomly.

[0023] The threshing roller 10 is uniformly provided with threshing teeth 14 to enhance the extrusion of the grains through the threshing teeth 14 and ensure the separation of the grains from the straw; at the same time, the friction with the straw is increased through the threshing teeth 14 to ensure that the straw can move forward. The threshing teeth 14 are arranged obliquely, and the oblique arrangement is to make the direction of the threshing teeth 14 inconsistent with the aperture direction of the threshing grid 11, thereby avoiding extruding the straw into the threshing grid 11. The threshing teeth 14 are crescent-shaped, and because the surface of the threshing teeth 14 is a circular arc, the threshing teeth 14 themselves form a transverse force on the grains when extruding the grains, promoting the threshing of the grains; at the same time, the extrusion of the straw and the grains by the crescent-shaped threshing teeth 14 is gradually strengthened, so that the extrusion of the grains exists a buffer to avoid the grains from being broken during the threshing process.

[0024] When the grain thresher is used, the driving motor 6 is started, and the driving motor 6 drives the collecting auger 3, the impurity removing fan 5 and the threshing roller 10 to rotate through the belt and the pulley respectively. After the driving motor 6 is started, the straw is spread in the discharging chute 12, and then the straw enters between the threshing roller 10 and the threshing grid 11 under the action of vibration and an inclined surface. The straw entering between the threshing roller 10 and the threshing grid 11 moves forward under the driving of the threshing roller 10 and is threshed under the action of the threshing roller 10 and the threshing grid 11. The threshed straw is thrown out of the straw outlet under the driving of the threshing roller 10; the grains after threshing enter the collecting auger 3 below the threshing grid 11, are transported to the conveying pipe 7 through the rotating collecting auger 3, and then are transported to the sorting box 4. The grains entering the sorting box 4 are separated from the impurities under the action of the airflow, and the impurities are discharged by the impurity removing fan 5 and the slag discharge pipe 15; the grains are discharged from the grain outlet 8.

[0025] The grain thresher can sort the grains after threshing by the threshing mechanism through the impurity removing fan 5 cooperating with the sorting box 4, and the lighter impurities are sucked and discharged by negative pressure, and the heavier grains are directly discharged from the sorting box. Because the grains and impurities are screened by air selection, they will not directly collide with the grains, thereby effectively ensuring the integrity of the grains and improving the germination rate of the threshed grains. The problem that the existing threshers directly collide with the grains, causing the grains to be easily damaged, is solved.

Claims

1. A grain thresher consisting of a frame (1), a threshing housing (2), a threshing mechanism, a gathering auger (3), a separating box (4), a foreign matter removing fan (5) and a drive motor (6), characterized in that: The rack (1) is provided with a threshing shell (2), the threshing shell (2) is provided with a threshing mechanism, the threshing shell (2) below the threshing mechanism is provided with a collection auger (3), one end of the collection auger (3) is connected with a sorting box (4) through a conveying pipe (7), the bottom of the sorting box (4) is provided with an outlet (8); the threshing mechanism is connected with a foreign matter removing fan (5), the inlet of the foreign matter removing fan (5) is communicated with the top of the sorting box (4); the rack (1) below the threshing shell (2) is provided with a driving motor (6), the driving motor (6) is connected with the other end of the collection auger (3) and the threshing mechanism through a belt wheel and a belt.

2. A grain thresher according to claim 1, characterised in that: The threshing mechanism is composed of a threshing shaft (9), a threshing roller (10) and a threshing grid (11), the threshing shaft (9) in the threshing shell (2) is provided with the threshing roller (10), the threshing shell (2) between the threshing roller (10) and the collection auger (3) is provided with the threshing grid (11); the threshing shaft (9) is movably connected with the threshing shell (2) through a bearing seat; one end of the threshing shaft (9) is connected with the impeller of the foreign matter removing fan (5), the other end of the threshing shaft (9) is connected with the driving motor (6) through a belt and a belt wheel.

3. A grain thresher according to claim 2, characterised in that: The threshing shell (2) on one side of the threshing roller (10) is provided with an inlet, the inlet is provided with a discharging groove (12); the threshing shell (2) on the other side of the threshing roller (10) is provided with a straw outlet, the straw outlet is provided with a guide cover (13).

4. A grain thresher as claimed in claim 2, wherein: The threshing roller (10) is uniformly provided with threshing teeth (14), the threshing teeth (14) are obliquely arranged, and the threshing teeth (14) are crescent-shaped.

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