Corn breeding threshing method

Abstract

The invention discloses a corn breeding and threshing method, and belongs to the technical field of corn threshing. According to the corn breeding threshing method, a rack is included, the rack is sequentially provided with a threshing box, a material receiving base and a sundry tray from top to bottom, an impurity removing fan is fixedly arranged at the bottom of the threshing box, the threshing box and the sundry tray are both fixedly connected with the rack, a first elastic telescopic rod is fixedly arranged between the sundry tray and the material receiving base, and a second elastic telescopic rod is fixedly arranged between the sundry tray and the material receiving base. The rack is further provided with an impurity removing mechanism used for cleaning corn stigma in corn kernels in the material receiving base. According to the corn thresher, corn kernels are automatically screened and separated after corn threshing, the cleanliness of corn seed kernels is guaranteed, the quality of corn seed threshed finished products is improved, the corn seed kernels do not need to be manually screened, manpower is saved, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of corn threshing technology, and more particularly to a corn breeding threshing method. Background Technology

[0002] After a period of growth, the corn plants mature, and the mature corn cobs are fed into a corn thresher for threshing. During threshing, the corn cobs are fed in through the inlet, and the corn is impacted inside the high-speed rotating rotor and drum, causing the corn kernels to be separated. Then, the corn kernels and corn cobs are conveyed out separately.

[0003] Currently, corn kernels obtained after threshing still contain many corn silks, small kernels, and broken kernels, making them unsuitable for direct use as seeds. Therefore, corn kernels threshed by the threshing machine need to be screened. Currently, manual screening using handheld sieves is used, which increases labor costs, is time-consuming and labor-intensive, and results in very low screening efficiency. Furthermore, corn seeds obtained after manual screening still contain some corn silks, broken kernels, and small kernels, leading to poor seed quality. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a corn breeding threshing method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A corn threshing method includes a frame, from top to bottom, a threshing box, a receiving seat, and a waste tray. A waste removal fan is fixedly installed at the bottom of the threshing box. The threshing box and the waste tray are both fixedly connected to the frame. A first elastic telescopic rod is fixed between the waste tray and the receiving seat. The frame is also equipped with a waste removal mechanism for cleaning corn silk from corn kernels in the receiving seat.

[0007] The specific steps for threshing corn are as follows:

[0008] S1: Feed the corn cobs into the ear bin of the threshing box;

[0009] S2: The corn ears placed in the ear bin are automatically threshed by the action of the threshing shaft inside the threshing box;

[0010] S3: After threshing, the corn kernels fall automatically from the ear bin. During the fall, the corn silk, small and broken corn kernels are automatically separated by the impurity removal fan.

[0011] S4: The corn kernels after initial separation fall into the receiving seat, where the impurities in the corn kernels are further separated by the impurity removal mechanism;

[0012] S5: The corn feed separated by the impurity removal mechanism is piled up in the receiving seat, while the removed impurities fall into the impurity tray, completing the corn threshing process.

[0013] Preferably, the receiving seat has a receiving cavity, and triangular baffles are provided on both sides of the receiving cavity. The two triangular baffles divide the receiving cavity from left to right into a first sub-cavity, a main cavity and a second sub-cavity. The main cavity is used to receive corn kernels falling from the threshing box.

[0014] Preferably, the bottoms of the first and second sub-cavities are hollow, the bottom of the main cavity is configured as a filter plate structure, and the first sub-cavity, the main cavity, and the second sub-cavity are all positioned directly above the waste tray.

[0015] Preferably, the impurity removal mechanism includes a mounting plate fixed on the frame, a drive shaft rotatably connected to the mounting plate, a drive motor fixed on the mounting plate and used to drive the drive shaft to rotate, a connector connected to the end of the drive shaft away from the mounting plate, and a reciprocating screw fixed to the connector. The reciprocating screw is coaxially arranged with the drive shaft. A sleeve is threadedly connected to the reciprocating screw. A second elastic telescopic rod is fixed to the sleeve through a support plate. A telescopic part is connected to the end of the second elastic telescopic rod away from the sleeve. A shaving removal component is fixed to the telescopic part.

[0016] Preferably, the shaving component includes a sleeve fixedly connected to the telescopic part, a rotating rod rotatably connected inside the sleeve, and a plurality of shaving rods evenly distributed along the axial direction of the rotating rod.

[0017] Preferably, the whisker rod has several arc-shaped grooves, each arc-shaped groove has a hook slidably connected to it, a compression spring is provided between the hook and the inner wall of the arc-shaped groove, a drum is fixed on the rotating rod, a pull rope is wound around the drum, a number of branch ropes are connected to the end of the pull rope away from the drum, and the end of each branch rope away from the pull rope is connected to a hook in one of the arc-shaped grooves.

[0018] Preferably, the telescopic part includes an elastic telescopic tube fixedly connected to the second elastic telescopic rod and a telescopic rod body rotatably connected inside the elastic telescopic tube. The telescopic rod body is fixedly connected to the rotating rod, and a movable gear is fixedly provided on the telescopic rod body.

[0019] Preferably, the frame is fixedly provided with a track frame that is slidably connected to the telescopic part. The track frame is provided with a movable groove for the movement of the second elastic telescopic rod. The track frame includes a horizontal frame that is horizontally arranged with the bottom wall of the main cavity and a triangular frame that cooperates with the triangular baffle. The horizontal frame and the triangular frame are fixedly connected. A rack plate that meshes with the movable gear is fixedly provided on the horizontal frame.

[0020] Preferably, the receiving seat has a sliding groove, and a plurality of first protrusions are fixedly provided on the inner wall of the sliding groove. A second protrusion is slidably connected in the sliding groove and moves against the first protrusions. An elastic telescopic plate is fixedly provided on the second protrusion, and the movable end of the elastic telescopic plate is fixedly connected to the sleeve.

[0021] Preferably, the connecting member is configured as a crankshaft, and a movable rod is movably connected to the connecting member. The end of the movable rod away from the connecting member is movably connected to the receiving seat.

[0022] Compared with the prior art, the present invention provides a corn breeding threshing method, which has the following beneficial effects:

[0023] 1. This corn threshing method, through the combination of a receiving seat and a cleaning mechanism, automatically screens and separates corn kernels after threshing, ensuring the cleanliness of corn seed particles and improving the quality of the finished corn seed threshing product. It also eliminates the need for manual screening of corn seed particles, saving manpower and improving work efficiency.

[0024] 2. This corn threshing method involves moving the tasseling rod along the sleeve to the first or second compartment. The movable gear meshes with the rack plate, and the movable gear drives the drum to wind up the pull rope. The pull rope applies tension to multiple sub-ropes, causing the sub-ropes to pull the hooks. The hooks retract into the arc-shaped grooves, and the corn tassels that were originally hooked on the hooks automatically move down along the smooth tasseling rod and fall into the impurity tray through the opening at the bottom of the first or second compartment, thus achieving efficient impurity removal of the corn kernels.

[0025] 3. In this corn breeding threshing method, the second protrusion intermittently abuts against multiple first protrusions in the chute during sliding, causing the second protrusion to be forced to move the elastic telescopic plate, which in turn causes the elastic telescopic plate to move the sleeve axially. The elastic telescopic tube freely expands and contracts, causing the sleeve to move the whiskering rod back and forth in the main cavity, increasing the range of motion of the whiskering rod in the corn kernels and improving the whiskering rod's effect on removing corn whiskers.

[0026] 4. In this corn breeding threshing method, the movable rod drives the receiving seat to move up and down relative to the miscellaneous material tray, and the first elastic telescopic rod extends and retracts freely, so that the receiving seat drives the corn kernels in the main cavity to shake, making it easier for broken kernels and small corn kernels to pass through the filter plate structure at the bottom of the main cavity and fall into the miscellaneous material tray. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the frame structure of the present invention;

[0029] Figure 3This is a schematic diagram of the external structure of the receiving base of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle;

[0031] Figure 5 This is a cross-sectional structural diagram of the receiving seat of the present invention;

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the sleeve of the present invention;

[0033] Figure 7 This is a schematic diagram of the cross-sectional structure of the whisker rod of the present invention;

[0034] Figure 8 This is a schematic diagram of the external structure of the second elastic telescopic rod of the present invention.

[0035] In the diagram: 1. Frame; 2. Threshing box; 201. Impurity removal fan; 3. Impurity tray; 301. First elastic telescopic rod; 4. Receiving seat; 401. Triangular baffle; 402. First chamber; 403. Main chamber; 404. Second chamber; 5. Mounting plate; 501. Drive shaft; 502. Drive motor; 503. Connecting piece; 504. Reciprocating screw; 505. Sleeve; 506. Second elastic telescopic rod; 6. Telescopic part; 601. Elastic telescopic tube; 602. Extension... 6021, retractable rod; 7, movable gear; 7, sleeve; 701, rotating rod; 702, whisker rod; 7021, arc groove; 7022, hook; 7023, compression spring; 8, drum; 801, pull rope; 8011, rope divider; 9, track frame; 901, movable groove; 902, horizontal frame; 9021, rack plate; 903, tripod; 10, slide groove; 1001, first protrusion; 11, second protrusion; 111, elastic telescopic plate; 12, movable rod. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Example: Refer to Figure 1 , Figure 2 and Figure 3 A corn breeding threshing method includes a frame 1. The frame 1 is provided with a threshing box 2, a receiving seat 4 and a waste tray 3 arranged from top to bottom. A waste removal fan 201 is fixedly installed at the bottom of the threshing box 2. The threshing box 2 and the waste tray 3 are both fixedly connected to the frame 1. A first elastic telescopic rod 301 is fixed between the waste tray 3 and the receiving seat 4. The frame 1 is also provided with a waste removal mechanism for cleaning corn silk from corn kernels in the receiving seat 4.

[0040] The specific steps for threshing corn are as follows:

[0041] S1: Feed the corn cobs into the ear bin of threshing box 2;

[0042] S2: The corn ears placed in the ear bin are automatically threshed by the action of the threshing shaft inside the threshing box 2;

[0043] S3: After threshing, the corn kernels fall automatically from the ear bin. During the fall, the corn silk, small and broken corn kernels are automatically separated by the impurity removal fan 201.

[0044] S4: The corn kernels after initial separation fall into the receiving seat 4, where the impurities in the corn kernels are further separated by the impurity removal mechanism;

[0045] S5: The corn material separated by the impurity removal mechanism is piled up in the receiving seat 4, while the removed impurities fall into the impurity tray 3, completing the corn threshing process.

[0046] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 As a preferred technical solution of the present invention, the receiving seat 4 is provided with a receiving cavity, and triangular baffles 401 are provided on both sides of the receiving cavity. The two triangular baffles 401 divide the receiving cavity from left to right into a first sub-cavity 402, a main cavity 403 and a second sub-cavity 404. The main cavity 403 is used to receive corn kernels falling from the threshing box 2.

[0047] Furthermore, the bottoms of the first chamber 402 and the second chamber 404 are hollow, and the bottom of the main chamber 403 is configured as a filter plate structure. The first chamber 402, the main chamber 403 and the second chamber 404 are all located directly above the waste material tray 3.

[0048] Specifically, the corn kernels threshed from the threshing box 2 fall directly into the main cavity 403 of the receiving seat 4 under their own gravity. The impurity removal fan 201 at the bottom of the threshing box 2 blows the falling corn kernels, and the corn silk, broken kernels and small corn kernels mixed in with the corn kernels are blown to the second dividing cavity 404 and fall into the impurity tray 3 through the second dividing cavity 404, thus realizing the preliminary impurity removal of the corn kernels after threshing. It should be noted that the frame 1 can also be replaced with a box or shell to avoid a lot of dust splashing during threshing.

[0049] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As a preferred technical solution of the present invention, the impurity removal mechanism includes a mounting plate 5 fixed on the frame 1, a drive shaft 501 rotatably connected to the mounting plate 5, a drive motor 502 fixed on the mounting plate 5 and used to drive the drive shaft 501 to rotate, a connector 503 connected to the end of the drive shaft 501 away from the mounting plate 5, and a reciprocating screw 504 fixed to the connector 503. The reciprocating screw 504 is coaxially arranged with the drive shaft 501. A sleeve 505 is threadedly connected to the reciprocating screw 504. A second elastic telescopic rod 506 is fixed to the sleeve 505 through a support plate. A telescopic part 6 is connected to the end of the second elastic telescopic rod 506 away from the sleeve 505. A shaving removal component is fixed to the telescopic part 6.

[0050] Furthermore, the whisker removal component includes a sleeve 7 fixedly connected to the telescopic part 6, a rotating rod 701 rotatably connected within the sleeve 7, and a plurality of whisker-removing rods 702 evenly distributed along the axial direction of the rotating rod 701.

[0051] Specifically, when the impurity removal mechanism is working, the drive motor 502 is controlled to run. The drive shaft 501 of the drive motor 502 drives the reciprocating screw 504 to rotate through the connector 503. The sleeve 505 moves axially along the reciprocating screw 504. The sleeve 505 drives the sleeve 7 to move along the length direction of the receiving seat 4 through the second elastic telescopic rod 506 and the telescopic part 6. When the sleeve 7 moves, it drives the whiskering rod 702 to remove the corn whiskers in the corn kernels in the main cavity 403. When the whiskering rod 702 moves the corn kernels in the main cavity 403, the corn kernels in the main cavity 403 move, which makes it easier for broken kernels and small corn kernels to pass through the filter plate structure at the bottom of the main cavity 403 and fall into the impurity tray 3. It should be noted that the frame 1 is provided with a cover plate to cover the reciprocating screw 504 to prevent impurities from falling on the reciprocating screw 504.

[0052] Reference Figure 5 , Figure 6 and Figure 7 As a preferred technical solution of the present invention, the whisk rod 702 is provided with a plurality of arc-shaped grooves 7021, and a hook 7022 is slidably connected in each arc-shaped groove 7021. A compression spring 7023 is provided between the hook 7022 and the inner wall of the arc-shaped groove 7021. A drum 8 is fixed on the rotating rod 701, and a pull rope 801 is wound and connected to the drum 8. A plurality of branch ropes 8011 are connected to the end of the pull rope 801 away from the drum 8. The end of each branch rope 8011 away from the pull rope 801 is connected to the hook 7022 in the plurality of arc-shaped grooves 7021 one by one.

[0053] Furthermore, the telescopic part 6 includes an elastic telescopic tube 601 fixedly connected to the second elastic telescopic rod 506 and a telescopic rod body 602 rotatably connected inside the elastic telescopic tube 601. The telescopic rod body 602 is fixedly connected to the rotating rod 701, and a movable gear 6021 is fixedly provided on the telescopic rod body 602.

[0054] Furthermore, a track frame 9 is fixedly mounted on the frame 1 and slidably connected to the telescopic part 6. The track frame 9 has an active groove 901 for the movement of the second elastic telescopic rod 506. The track frame 9 includes a horizontal frame 902 that is horizontally arranged with the bottom wall of the main cavity 403 and a triangular frame 903 that cooperates with the triangular baffle 401. The horizontal frame 902 and the triangular frame 903 are fixedly connected. A rack plate 9021 that meshes with the movable gear 6021 is fixedly mounted on the horizontal frame 902.

[0055] Specifically, when the siphon rod 702 moves with the sleeve 7, the hooks 7022 on the outside of the siphon rod 702 can effectively hook the corn silk. The siphon rod 702 is provided with evenly distributed hooks 7022. As the sleeve 505 gradually moves along the reciprocating screw 504, when the sleeve 7 is about to move from the main cavity 403 to the first sub-cavity 402 or from the main cavity 403 to the second sub-cavity 404, the sleeve 7 moves upward along the triangular frame 903 of the track frame 9, causing the sleeve 7 to drive the siphon rod 702 upward, avoiding the siphon rod 702 abutting against the triangular baffle 401, which would affect the normal displacement operation of the sleeve 7. After the sleeve 7 moves to the first compartment 402 or the second compartment 404, the movable gear 6021 meshes with the rack plate 9021 for transmission. The movable gear 6021 drives the drum 8 to wind up the pull rope 801. The pull rope 801 applies tension to multiple branch ropes 8011, causing the branch ropes 8011 to pull the hook 7022. The hook 7022 retracts into the arc groove 7021. The corn silk that was originally hooked on the hook 7022 then moves down automatically along the smooth shaving rod 702 and falls into the impurity tray 3 through the opening at the bottom of the first compartment 402 or the second compartment 404, thus achieving efficient impurity removal of the corn kernels.

[0056] Reference Figure 3 and Figure 8 As a preferred technical solution of the present invention, a sliding groove 10 is provided on the receiving seat 4, and a plurality of first protrusions 1001 are fixedly provided on the inner wall of the sliding groove 10. A second protrusion 11 is slidably connected in the sliding groove 10 and moves against the first protrusions 1001. An elastic telescopic plate 111 is fixedly provided on the second protrusion 11, and the movable end of the elastic telescopic plate 111 is fixedly connected to the sleeve 7.

[0057] Specifically, when the sleeve 7 moves axially along the reciprocating screw 504 with the telescopic part 6, the second protrusion 11 at the bottom of the elastic telescopic plate 111 slides in the groove 10, and the second protrusion 11 slides and intermittently abuts against the multiple first protrusions 1001 in the groove 10, so that the second protrusion 11 is forced to move the elastic telescopic plate 111, which in turn causes the elastic telescopic plate 111 to drive the sleeve 7 to move axially, and the elastic telescopic tube 601 to extend and retract freely, so that the sleeve 7 drives the shaving rod 702 to reciprocate within the main cavity 403, increasing the range of motion of the shaving rod 702 in the corn kernels and improving the shaving rod 702's effect on removing corn silk.

[0058] Reference Figure 1 , Figure 3 and Figure 4 As a preferred technical solution of the present invention, the connecting member 503 is configured as a crankshaft, and a movable rod 12 is movably connected to the connecting member 503. The end of the movable rod 12 away from the connecting member 503 is movably connected to the receiving seat 4.

[0059] Specifically, when the drive shaft 501 rotates, it drives the crankshaft to rotate. When the drive shaft 501 rotates, it drives the movable rod 12 to swing, causing the movable rod 12 to move the receiving seat 4 up and down relative to the waste material tray 3. The first elastic telescopic rod 301 extends and retracts freely, causing the receiving seat 4 to shake the corn kernels in the main cavity 403, making it easier for broken kernels and small corn kernels to pass through the filter plate structure at the bottom of the main cavity 403 and fall into the waste material tray 3.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for threshing corn for breeding, comprising a frame (1), characterized in that, The frame (1) is provided with a threshing box (2), a receiving seat (4) and a waste tray (3) from top to bottom. A waste removal fan (201) is fixedly installed at the bottom of the threshing box (2). The threshing box (2) and the waste tray (3) are both fixedly connected to the frame (1). A first elastic telescopic rod (301) is fixedly installed between the waste tray (3) and the receiving seat (4). The frame (1) is also provided with a waste removal mechanism for cleaning the corn silk in the corn kernels in the receiving seat (4). The specific steps for threshing corn are as follows: S1: Feed the corn cobs into the ear bin of the threshing box (2); S2: The corn ears placed in the ear bin are automatically threshed by the action of the threshing shaft inside the threshing box (2); S3: After threshing, the corn kernels fall automatically from the ear bin. During the fall, the corn silk, small and broken corn kernels are automatically separated by the impurity removal fan (201). S4: The corn kernels after initial separation fall into the receiving seat (4), and the impurities in the corn kernels are further separated by the impurity removal mechanism; S5: The corn material separated by the impurity removal mechanism is piled up in the receiving seat (4), and the removed impurities fall into the impurity tray (3), completing the corn threshing work.

2. The corn breeding threshing method according to claim 1, characterized in that, The receiving seat (4) is provided with a receiving cavity. Triangular baffles (401) are provided on both sides of the receiving cavity. The two triangular baffles (401) divide the receiving cavity from left to right into a first sub-cavity (402), a main cavity (403) and a second sub-cavity (404). The main cavity (403) is used to receive corn kernels falling from the threshing box (2).

3. The corn breeding threshing method according to claim 2, characterized in that, The bottom of the first sub-cavity (402) and the second sub-cavity (404) is hollow, and the bottom of the main cavity (403) is set as a filter plate structure. The first sub-cavity (402), the main cavity (403) and the second sub-cavity (404) are all located directly above the miscellaneous material tray (3).

4. The corn breeding threshing method according to claim 2, characterized in that, The impurity removal mechanism includes a mounting plate (5) fixed on the frame (1), a drive shaft (501) rotatably connected to the mounting plate (5), a drive motor (502) fixed on the mounting plate (5) and used to drive the drive shaft (501) to rotate, a connector (503) connected to the end of the drive shaft (501) away from the mounting plate (5), and a reciprocating screw (504) fixed to the connector (503). The reciprocating screw (504) is coaxially arranged with the drive shaft (501). A sleeve (505) is threaded on the reciprocating screw (504). A second elastic telescopic rod (506) is fixed on the sleeve (505) through a support plate. A telescopic part (6) is connected to the end of the second elastic telescopic rod (506) away from the sleeve (505). A shaving removal component is fixed on the telescopic part (6).

5. A method for threshing corn in breeding according to claim 4, characterized in that, The shaving component includes a sleeve (7) fixedly connected to the telescopic part (6), a rotating rod (701) rotatably connected inside the sleeve (7), and a plurality of shaving rods (702) evenly distributed along the axial direction of the rotating rod (701).

6. The corn breeding threshing method according to claim 5, characterized in that, The auger rod (702) has several arc-shaped grooves (7021) inside, and a hook (7022) is slidably connected in each arc-shaped groove (7021). A compression spring (7023) is provided between the hook (7022) and the inner wall of the arc-shaped groove (7021). A drum (8) is fixed on the rotating rod (701), and a pull rope (801) is wound around the drum (8). A number of branch ropes (8011) are connected to one end of the pull rope (801) away from the drum (8). The end of each branch rope (8011) away from the pull rope (801) is connected to the hook (7022) in the arc-shaped groove (7021) one by one.

7. A method for threshing corn in breeding according to claim 6, characterized in that, The telescopic part (6) includes an elastic telescopic tube (601) fixedly connected to the second elastic telescopic rod (506) and a telescopic rod body (602) rotatably connected inside the elastic telescopic tube (601). The telescopic rod body (602) is fixedly connected to the rotating rod (701), and a movable gear (6021) is fixedly provided on the telescopic rod body (602).

8. A method for threshing corn in breeding according to claim 7, characterized in that, The frame (1) is fixedly provided with a track frame (9) that is slidably connected to the telescopic part (6). The track frame (9) is provided with an active groove (901) for the movement of the second elastic telescopic rod (506). The track frame (9) includes a horizontal frame (902) that is horizontally set with the bottom wall of the main cavity (403) and a triangular frame (903) that cooperates with the triangular baffle (401). The horizontal frame (902) and the triangular frame (903) are fixedly connected. The horizontal frame (902) is fixedly provided with a rack plate (9021) that meshes with the movable gear (6021).

9. A method for threshing corn in breeding according to claim 8, characterized in that, The receiving seat (4) is provided with a sliding groove (10). The inner wall of the sliding groove (10) is fixed with a number of first protrusions (1001) distributed at equal intervals. The sliding groove (10) is slidably connected with a second protrusion (11) that moves against the first protrusion (1001). An elastic telescopic plate (111) is fixed on the second protrusion (11). The movable end of the elastic telescopic plate (111) is fixedly connected to the sleeve (7).

10. A method for threshing corn in breeding according to claim 9, characterized in that, The connector (503) is configured as a crankshaft, and a movable rod (12) is movably connected to the connector (503). The end of the movable rod (12) away from the connector (503) is movably connected to the receiving seat (4).

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