Seed-production corn seed screening equipment and method

Abstract

The invention discloses seed-production corn seed screening equipment and a seed-production corn seed screening method, and relates to the technical field of seed screening. The ring frame is fixed on the upper side of the box body; the rotating frame is inserted into the upper side of the box body; a rotating bearing is arranged on the inner ring wall of the ring frame, and the rotating frame penetrates through and is fixed in the rotating bearing; the bottom end of the rotating frame is sleeved with the screen frame. The mounting assembly is arranged between the rotating frame and the screen frame; the movable frame is arranged in the box body in a sliding manner; the screen frame is screwed and arranged in the movable frame in a penetrating mode through threads, and the aperture of a screen mesh in the screen frame is smaller than that of a screen mesh in the screen frame; the two movable assemblies are arranged on the left side and the right side of the movable frame correspondingly. The two reinforcing assemblies are oppositely arranged on the lower side of the screen frame left and right; through two screening steps, the screening quality is improved, the screen is convenient to disassemble, the edge is convenient to clean subsequently, and seed blockage is avoided.

Description

Technical Field

[0001] This invention relates to the field of seed screening technology, specifically to a screening device and method for seed-producing maize seeds. Background Technology

[0002] The quality of seeds directly affects the growth and harvest of plants. Therefore, plump corn kernels are selected for cultivation. The current method for selecting corn seeds is to pour all the seeds onto a sieve and sift them. However, the sieve is prone to clogging and difficult to clean. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a simple, rationally designed, and easy-to-use seed screening device and method for seed production maize. Through two screening steps, not only is the screening quality improved, but the screen is also easy to disassemble and the edges can be cleaned later to avoid seed blockage.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: it includes a box body, the front of which is provided with double doors; the upper side of the box body is provided with an open structure.

[0005] It also includes:

[0006] The ring frame is fixed to the upper side of the box body;

[0007] A rotating frame is inserted into the upper interior of the housing body, and the upper end of the rotating frame is sleeved on the ring frame; a rotating bearing is provided on the inner ring wall of the ring frame, and the rotating frame passes through and is fixed inside the rotating bearing.

[0008] A screen frame, wherein the screen frame is sleeved on the bottom end of the rotating frame;

[0009] The mounting assembly is disposed between the rotating frame and the screen frame;

[0010] The movable frame is slidably disposed inside the box body and is disposed on the lower side of the screen frame;

[0011] The screen frame is threadedly inserted into the interior of the movable frame, and a guide frame is provided at the bottom of the screen frame. A guide groove is provided at the bottom of the movable frame. The horizontal end of the guide frame contacts the bottom of the movable frame, and the vertical end of the guide frame passes through the guide groove. The aperture of the screen inside the screen frame is smaller than that of the screen inside the screen frame.

[0012] The movable components are two in number, respectively located on the left and right sides of the movable frame;

[0013] The reinforcing components are two in number, arranged opposite each other on the lower side of the screen frame;

[0014] The above technical solution allows for two separate screening operations on corn seeds, and both the sieve frame and the sieve stand can be easily disassembled for cleaning.

[0015] As a further improvement of the present invention, the mounting component includes:

[0016] A support frame, wherein the support frame is sleeved and fixed on the ring frame, and the support frame is located on the lower side of the rotating bearing;

[0017] The electric push rods are a plurality of each, which are fixed to the inner ring wall of the vertical end of the support frame at equal angles around the circumference. The electric push rods are connected to an external power source.

[0018] The pusher frame consists of several units, each mounted on the push end of the electric push rod. The pusher frame has an "L" shaped structure, with the horizontal end of the pusher frame passing through the vertical end of the screen frame and then inserted into the ring frame.

[0019] The above technical solution design allows the pusher frame to move and connect the screen frame with the ring frame.

[0020] As a further improvement of the present invention, the upper circumference of the horizontal end of the support frame is provided with several grooves at equal angles, and the vertical end of the push frame slides through the grooves.

[0021] The above technical solution is designed to guide the movement of the push frame.

[0022] As a further improvement of the present invention, the active component includes:

[0023] The movable block is slidably inserted into the movable groove opened in the side wall of the box body, and the inner side of the movable block is connected to the side wall of the movable frame.

[0024] The drive block is disposed on the outside of the housing body and is connected to the outside of the movable block.

[0025] Two connecting blocks are fixed to the bottom of the connecting blocks, one in front of the other, and the upper side of the connecting blocks is provided with a groove.

[0026] The support block is located on the outer wall of the housing body and below the movable groove; an electric telescopic rod is provided on the support block and is connected to an external power source.

[0027] The double-tooth block is fixed to the push end of the electric telescopic rod, and gears are meshed on the front and rear sides of the double-tooth block respectively. A support shaft is inserted and fixed inside the gear, and the inner end of the support shaft is screwed onto the outer wall of the box body through a bearing.

[0028] The rotating component consists of two parts, each sleeved and fixed on the support shaft, and the rotating component is located on the outside of the gear; the outside of the rotating component passes through the groove, and a guide groove is provided on the outside of the rotating component.

[0029] The guide rods are two in number, each fixed in a groove, and the guide rods pass through the grooves.

[0030] Through the above technical solution design, the two gears in front and behind the double-tooth block move and rotate synchronously, so that the two rotating parts rotate at the same time. When the rotating parts rotate, the connecting block is driven by the sliding cooperation between the guide groove and the guide rod, so that the movable frame moves.

[0031] As a further improvement of the present invention, the reinforcing component includes:

[0032] An arc-shaped guide block is fixed to the inner ring wall of the screen frame, and a sliding groove is provided inside the arc-shaped guide block.

[0033] The motor support is fixed to the inner ring wall of the screen frame and is located on the lower side of the arc-shaped guide block.

[0034] The striking motor is fixed to the rear side of the motor bracket and connected to an external power source. The output shaft of the striking motor passes through the motor bracket and is fitted with a rotating frame.

[0035] A striking frame, wherein the striking frame is inserted into a slide groove and the striking frame and the slide groove are hinged together by a hinge shaft;

[0036] Through the above technical solution design, the rotating frame applies pressure to the beating frame, causing the beating frame to beat the screen inside the screen frame, thereby accelerating the fall of corn seeds.

[0037] As a further improvement of the present invention, a compression spring is provided on the bottom side of the striking frame away from the rotating frame, and the compression spring is connected to the arc-shaped guide block.

[0038] Through the above technical design, the compression spring plays a limiting role in the striking frame.

[0039] As a further improvement of the present invention, the bottom of the guide frame is provided with pull handles on the left and right sides respectively;

[0040] The above technical solution is designed to facilitate the operation of the screen frame.

[0041] As a further improvement of the present invention, an anti-fall cover is sleeved and fixed on the outer side of the upper end of the rotating frame;

[0042] The above technical solution design prevents corn seeds from falling into the gap between the ring frame and the box body.

[0043] With the above structure, the beneficial effects of the present invention are as follows:

[0044] 1. The connection between the sieve frame and the rotating frame is a movable connection, which facilitates the processing of corn seeds inside the sieve frame by driving and adjusting the movable frame.

[0045] 2. The mesh size of the screen inside the sieve frame is larger than that of the screen inside the sieve rack, so that the corn seeds are gradually sieved, with larger corn seeds remaining inside the sieve frame and smaller corn seeds remaining inside the sieve rack.

[0046] 3. As the corn seeds move downwards through the sieve frame, the movable frame guides the corn seeds.

[0047] 4. By tapping the screen inside the sieve frame, corn seeds smaller than the mesh size of the screen inside the sieve frame will fall downwards. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the present invention.

[0050] Figure 2 yes Figure 1 Enlarged view of part A.

[0051] Figure 3 This is a schematic diagram of the internal structure of the present invention.

[0052] Figure 4 yes Figure 3 Enlarged view of part B.

[0053] Figure 5 yes Figure 3 Enlarged view of part C.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Box body, 1-1 double doors, 1-2 movable groove, 2. ring frame, 3. rotating frame, 4. rotary bearing, 5. screen frame, 6. mounting assembly, 6-1 support frame, 6-1 groove, 6-2 electric push rod, 6-3 push frame, 7. movable frame, 7-1 guide groove, 8. screen frame, 8-1 guide frame, 8-2 handle, 9. movable assembly, 9-1 movable block, 9-2 drive block, 9-3 connecting block, 9-3 groove, 9-4 support block, 9-5 electric telescopic rod, 9-6 double toothed block, 9-7 gear, 9-8 support shaft, 9-9 rotating part, 9-9-1 guide groove, 9-10 guide rod, 10. reinforcing assembly, 10. arc-shaped guide block, 10. sliding groove, 10.1-1 motor bracket, 10. striking motor, 10. rotating frame, 10. striking frame, 10. compression spring, 10. anti-fall cover. Detailed Implementation

[0056] The invention will now be further described with reference to the accompanying drawings.

[0057] Example 1:

[0058] Please see Figures 1-5 In this embodiment, it includes a box body 1, and the front of the box body 1 is provided with double doors 1-1; the upper side of the box body 1 is provided with an open structure.

[0059] It also includes:

[0060] Ring frame 2, which is fixed to the upper side of the box body 1;

[0061] The rotating frame 3 is inserted into the upper interior of the box body 1, and the upper end of the rotating frame 3 is sleeved on the ring frame 2; the upper outer side of the rotating frame 3 is sleeved and fixed with an anti-drop cover 11; a rotating bearing 4 is provided on the inner ring wall of the ring frame 2, and the rotating frame 3 passes through and is fixed inside the rotating bearing 4.

[0062] The screen frame 5 is sleeved on the bottom end of the rotating frame 3;

[0063] Mounting component 6 is disposed between the rotating frame 3 and the screen frame 5;

[0064] The movable frame 7 is slidably disposed inside the box body 1 and is disposed on the lower side of the screen frame 5;

[0065] The screen frame 8 is threadedly inserted into the interior of the movable frame 7. A guide frame 8-1 is provided at the bottom of the screen frame 8. A guide groove 7-1 is provided at the bottom of the movable frame 7. The horizontal end of the guide frame 8-1 contacts the bottom of the movable frame 7, and the vertical end of the guide frame 8-1 passes through the guide groove 7-1. The aperture of the screen inside the screen frame 8 is smaller than that of the screen inside the screen frame 5. Pull handles 8-2 are provided on the left and right sides of the bottom of the guide frame 8-1.

[0066] Two movable components 9 are respectively located on the left and right sides of the movable frame 7;

[0067] Reinforcing components 10, there are two reinforcing components 10, which are arranged opposite each other on the lower side of the screen frame 8;

[0068] Using the above design scheme, corn seeds are screened in two stages, and both the sieve frame 5 and the sieve rack 8 can be easily disassembled for cleaning.

[0069] Example 2:

[0070] Please see Figures 1-5 Based on Embodiment 1, the installation component 6 is further improved and includes:

[0071] Support frame 6-1, which is sleeved and fixed on ring frame 2, and is located on the lower side of rotary bearing 4;

[0072] Electric push rods 6-2, there are several electric push rods 6-2, which are fixed to the inner ring wall of the vertical end of the support frame 6-1 in a circumferentially equidistant distribution. The electric push rods 6-2 are connected to an external power source. The specific model of the electric push rods 6-2 is purchased and installed directly from the market according to the actual use requirements.

[0073] The pusher frame 6-3 consists of several units, each mounted on the push end of the electric push rod 6-2. The pusher frame 6-3 has an "L" shaped structure. The horizontal end of the pusher frame 6-3 passes through the vertical end of the screen frame 5 and is inserted into the ring frame 2. The upper circumference of the horizontal end of the support frame 6-1 is provided with several grooves 6-1-1 evenly distributed, and the vertical end of the pusher frame 6-3 slides through the grooves 6-1-1.

[0074] Using the above design scheme, the push frame 6-3 is moved to connect the screen frame 5 with the ring frame 2.

[0075] Example 3:

[0076] Please see Figures 1-5 Based on Embodiment 1, the active component 9 is further improved and includes:

[0077] Movable block 9-1, the movable block 9-1 is slidably inserted into the movable groove 1-2 opened in the side wall of the box body 1, and the inner side of the movable block 9-1 is connected to the side wall of the movable frame 7.

[0078] Drive block 9-2 is disposed in contact with the outside of the housing body 1, and is connected to the outside of the movable block 9-1.

[0079] Connecting block 9-3, there are two connecting blocks 9-3, which are fixed to the bottom of the connecting block 9-3 with the front and rear facing each other, and the upper side of the connecting block 9-3 is provided with a groove 9-3-1;

[0080] Support block 9-4 is located on the outer wall of the housing body 1 and is located on the lower side of the movable groove 1-2; an electric telescopic rod 9-5 is provided on the support block 9-4 and is connected to an external power source; the specific model of the electric telescopic rod 9-5 is purchased and installed directly from the market according to actual usage requirements.

[0081] Double tooth block 9-6, the double tooth block 9-6 is fixed on the pushing end of electric telescopic rod 9-5, and gears 9-7 are respectively meshed on the front and rear sides of the double tooth block 9-6. A support shaft 9-8 is inserted and fixed inside the gear 9-7. The inner end of the support shaft 9-8 is screwed onto the outer wall of the box body 1 through a bearing.

[0082] Rotating component 9-9, there are two rotating components 9-9, which are respectively sleeved and fixed on the support shaft 9-8, and the rotating component 9-9 is located on the outside of the gear 9-7; the outside of the rotating component 9-9 passes through the groove 9-3-1, and the outside of the rotating component 9-9 is provided with a guide groove 9-9-1;

[0083] Guide rod 9-10, there are two guide rods 9-10, which are respectively fixed in the groove 9-3-1, and the guide rod 9-10 passes through the groove 9-3-1;

[0084] Using the above design scheme, the double toothed block 9-6 drives the two front and rear gears 9-7 to rotate synchronously, so that the two rotating parts 9-9 rotate at the same time. When the rotating parts 9-9 rotate, they drive the connecting block 9-3 through the sliding cooperation between the guide groove 9-9-1 and the guide rod 9-10, so that the movable frame 7 moves.

[0085] Example 4:

[0086] Please see Figures 1-5 Based on Embodiment 1, the reinforcing component 10 is further improved and includes:

[0087] Arc-shaped guide block 10-1, the arc-shaped guide block 10-1 is fixed on the inner ring wall of the screen frame 8, and the arc-shaped guide block 10-1 has a sliding groove 10-1-1 inside;

[0088] Motor bracket 10-2 is fixed to the inner ring wall of screen frame 8 and is located on the lower side of arc-shaped guide block 10-1.

[0089] The striking motor 10-3 is fixed to the rear side of the motor bracket 10-2 and is connected to an external power source. The specific model of the striking motor 10-3 is purchased and installed directly from the market according to the actual usage requirements. After the output shaft of the striking motor 10-3 passes through the motor bracket 10-2, a rotating frame 10-4 is provided.

[0090] A striking frame 10-5 is inserted into a slide groove 10-1-1, and the striking frame 10-5 and the slide groove 10-1-1 are hinged together by a hinge shaft; a compression spring 10-6 is provided on the bottom side of the striking frame 10-5 away from the rotating frame 10-4, and the compression spring 10-6 is connected to the arc-shaped guide block 10-1;

[0091] Using the above design, the rotating frame 10-4 rotates to apply pressure to the beating frame 10-5, causing the beating frame 10-5 to beat the screen inside the screen frame 8, thus accelerating the fall of the corn seeds.

[0092] When using this invention, open the double doors 1-1 on the front side of the box body 1, place the collected cylinder on the inner bottom surface of the box body 1, and close the double doors 1-1; manually pour the corn seeds into the rotating frame 3, and at the same time manually rotate the upper side of the rotating frame 3, so that the larger corn seeds remain in the sieve frame 5, and the smaller corn seeds fall down from the sieve holes in the sieve frame 5 and are placed in the sieve frame 8; at the same time, start the left and right side striking motors 10-3, so that the rotating frame 10-4 rotates and applies force to the lower end of the striking frame 10-5, so that the striking frame 10-5 rotates around the hinge axis between it and the arc-shaped guide block 10-1, so that the upper end of the striking frame 10-5 strikes the bottom of the sieve in the sieve frame 8, so that the smaller corn seed particles inside the sieve frame 8 fall down and land on the collected cylinder, thereby sieving the corn seeds;

[0093] After screening, open the double door 1-1 again and first remove the bottom collection cylinder. Then, manually rotate the handle 8-2 on the lower side of the guide frame 8-1 to make the screen frame 8 rotate downward and disengage from the movable frame 7. Next, start the electric telescopic rods 9-5 on the left and right sides to push the double toothed block 9-6 upward, meshing the gears 9-7 on the front and rear sides to rotate synchronously, driving the rotating part 9-9 to rotate. During the rotation of the rotating part 9-9, the guide groove 9-9-1 on its outer side presses the guide rod 9-10, causing the connecting block 9-3 to move the movable frame 7 downward and away from the screen frame 5. Start the electric push rod 6-2 to drive the push frame 6-3 to move outward and disengage from the screen frame 5 so that the screen frame 5 can be removed.

[0094] The beneficial effects of this specific embodiment after adopting the above structure are as follows:

[0095] 1. The connection between the sieve frame 5 and the rotating frame 3 is a movable connection, which facilitates the processing of corn seeds inside the sieve frame 5 by driving and adjusting the movable frame 7.

[0096] 2. The mesh size of the screen in the sieve frame 5 is larger than that of the screen in the sieve rack 8, so that the corn seeds are gradually screened, with larger corn seeds remaining in the sieve frame 5 and smaller corn seeds remaining in the sieve rack 8.

[0097] 3. As the corn seeds move downward through the sieve frame 5, the movable frame 7 guides the corn seeds.

[0098] 4. By tapping the screen inside the sieve frame 8, corn seeds smaller than the mesh size of the screen inside the sieve frame 8 are made to fall downwards.

[0099] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A seed screening device and method for seed production of maize, comprising a box body (1), wherein a double door (1-1) is provided on the front side of the box body (1); the upper side of the box body (1) is an open structure; Its features are, It also includes: Ring frame (2), the ring frame (2) is fixed to the upper side of the box body (1); Rotating frame (3), the rotating frame (3) is inserted into the upper side of the box body (1), and the upper end of the rotating frame (3) is sleeved on the ring frame (2); a rotating bearing (4) is provided on the inner ring wall of the ring frame (2), and the rotating frame (3) passes through and is fixed inside the rotating bearing (4). The screen frame (5) is sleeved on the bottom end of the rotating frame (3); The mounting component (6) is disposed between the rotating frame (3) and the screen frame (5); The movable frame (7) is slidably disposed inside the box body (1) and is disposed on the lower side of the screen frame (5); The screen frame (8) is threadedly inserted into the interior of the movable frame (7), and a guide frame (8-1) is provided at the bottom of the screen frame (8). A guide groove (7-1) is provided at the bottom of the movable frame (7). The horizontal end of the guide frame (8-1) is in contact with the bottom of the movable frame (7), and the vertical end of the guide frame (8-1) is inserted into the guide groove (7-1). The aperture of the screen in the screen frame (8) is smaller than the aperture of the screen in the screen frame (5). Two movable components (9) are respectively located on the left and right sides of the movable frame (7); The reinforcing components (10) are two in number, arranged opposite each other on the lower side of the screen frame (8).

2. The seed screening equipment and method for seed production maize according to claim 1, characterized in that: The installation component (6) includes: The support frame (6-1) is sleeved and fixed on the ring frame (2), and the support frame (6-1) is located on the lower side of the rotary bearing (4); Electric push rods (6-2), there are several electric push rods (6-2), which are fixed on the inner ring wall of the vertical end of the support frame (6-1) in a circumferentially equidistant distribution. The electric push rods (6-2) are connected to an external power source. The pusher (6-3) consists of several units, each set on the push end of the electric push rod (6-2). The pusher (6-3) is set in an "L" shape. The horizontal end of the pusher (6-3) passes through the vertical end of the screen frame (5) and is inserted into the ring frame (2).

3. The seed screening equipment and method for seed production maize according to claim 2, characterized in that: The support frame (6-1) has several grooves (6-1-1) evenly distributed on the upper circumference of the horizontal end, and the vertical end of the push frame (6-3) slides through the grooves (6-1-1).

4. The seed screening equipment and method for seed production maize according to claim 1, characterized in that: The activity component (9) includes: Movable block (9-1), the movable block (9-1) is slidably inserted into the movable groove (1-2) opened in the side wall of the box body (1), and the inner side of the movable block (9-1) is connected to the side wall of the movable frame (7). The drive block (9-2) is disposed in contact with the outside of the housing body (1) and is connected to the outside of the movable block (9-1). Connecting block (9-3), there are two connecting blocks (9-3), which are fixed to the bottom of the connecting block (9-3) with the front and rear facing each other, and the upper side of the connecting block (9-3) is provided with a groove (9-3-1); Support block (9-4), the support block (9-4) is set on the outer side wall of the box body (1), and the support block (9-4) is set on the lower side of the movable groove (1-2); an electric telescopic rod (9-5) is set on the support block (9-4), and the electric telescopic rod (9-5) is connected to an external power source. Double toothed block (9-6), the double toothed block (9-6) is fixed on the pushing end of the electric telescopic rod (9-5), and gears (9-7) are respectively meshed on the front and rear sides of the double toothed block (9-6). A support shaft (9-8) is inserted and fixed inside the gear (9-7). The inner end of the support shaft (9-8) is screwed onto the outer wall of the box body (1) through a bearing. Rotating component (9-9), there are two rotating components (9-9), which are respectively sleeved and fixed on the support shaft (9-8), and the rotating component (9-9) is located on the outside of the gear (9-7); the outside of the rotating component (9-9) passes through the groove (9-3-1), and the outside of the rotating component (9-9) is provided with a guide groove (9-9-1); Guide rod (9-10), there are two guide rods (9-10), which are fixed in the groove (9-3-1) respectively, and the guide rod (9-10) passes through the groove (9-3-1).

5. The seed screening equipment and method for seed production maize according to claim 1, characterized in that: The reinforcing component (10) includes: Arc-shaped guide block (10-1), the arc-shaped guide block (10-1) is fixed on the inner ring wall of the screen frame (8), and the arc-shaped guide block (10-1) has a sliding groove (10-1-1) inside; The motor bracket (10-2) is fixed on the inner ring wall of the screen frame (8) and is located on the lower side of the arc-shaped guide block (10-1). A striking motor (10-3) is fixed to the rear side of a motor bracket (10-2). The striking motor (10-3) is connected to an external power source. The output shaft of the striking motor (10-3) passes through the motor bracket (10-2) and is then fitted with a rotating frame (10-4). A striking frame (10-5) is inserted into a sliding groove (10-1-1), and the striking frame (10-5) and the sliding groove (10-1-1) are hinged together by a hinge shaft.

6. The seed screening equipment and method for seed production maize according to claim 5, characterized in that: A compression spring (10-6) is provided on the bottom side of the striking frame (10-5) away from the rotating frame (10-4), and the compression spring (10-6) is connected to the arc-shaped guide block (10-1).

7. The seed screening equipment and method for seed production maize according to claim 1, characterized in that: The bottom of the guide frame (8-1) is provided with handles (8-2) facing each other on the left and right.

8. The seed screening equipment and method for seed production maize according to claim 1, characterized in that: The upper outer side of the rotating frame (3) is fitted with and fixed with a fall-proof cover (11).

9. The seed screening equipment and method for seed production maize according to claim 1, characterized in that: Open the double doors (1-1) on the front side of the main body (1), place the collected cylinder on the inner bottom surface of the main body (1), and close the double doors (1-1). The corn seeds are manually poured into the rotating frame (3), and the upper side of the rotating frame (3) is rotated manually at the same time. This causes the larger corn seeds to remain in the sieve frame (5), while the smaller corn seeds fall down through the sieve holes in the sieve frame (5) and into the sieve frame (8). At the same time, the striking motors (10-3) on the left and right sides are started, causing the rotating frame (10-4) to rotate and strike the lower end of the striking frame (10-5). This causes the striking frame (10-5) to rotate around the hinge axis between itself and the arc-shaped guide block (10-1), causing the upper end of the striking frame (10-5) to strike the bottom of the sieve in the sieve frame (8), causing the smaller corn seed particles inside the sieve frame (8) to fall down and land on the collecting cylinder, thus sieving the corn seeds. After screening, open the double door (1-1) again, and take out the bottom collection cylinder first; then manually rotate the handle (8-2) on the lower side of the guide frame (8-1) to make the screen frame (8) rotate downward and disengage from the movable frame (7); then, start the electric telescopic rods (9-5) on the left and right sides to push the double tooth block (9-6) upward, mesh the gears (9-7) on the front and rear sides to rotate synchronously, and drive the rotating part (9-9) to rotate. During the rotation of the rotating part (9-9), the guide groove (9-9-1) on its outer side presses the guide rod (9-10) to make the connecting block (9-3) drive the movable frame (7) to move downward and away from the screen frame (5). Start the electric push rod (6-2) to drive the push frame (6-3) to move outward and disengage from the screen frame (5) so that the screen frame (5) can be taken out.

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