A portable seed sorting device

Abstract

The utility model relates to the technical field of seed screening, and discloses a portable seed sorting device, which comprises a movable frame, a horizontal rod arranged in the movable frame, a sieve cylinder rotatably arranged in the movable frame and coaxially distributed with the horizontal rod, a reciprocating stirring mechanism comprising a cam assembly coaxially arranged with the sieve cylinder and synchronously rotating with the sieve cylinder, a slide rod slidingly arranged along the axis direction of the horizontal rod, one end of the slide rod being provided with a matching end matched with the cam assembly, the slide rod being provided with a stirring rod, and a spring arranged at the end of the slide rod away from the matching end and connected with the horizontal rod. In the utility model, the rotary motion of the sieve cylinder is combined with the axial reciprocating motion of the stirring rod to form a combined stirring, so that the seeds are fully contacted with the sieve holes, and the thoroughness of the screening and the work efficiency are improved. The stirring rod forms a one-way pushing effect in the reciprocating motion, pushes the materials when advancing, and allows the materials to pass when retreating.

Description

Technical Field

[0001] This utility model relates to the field of seed screening technology, specifically a portable seed sorting device. Background Technology

[0002] Seeds are the reproductive bodies unique to gymnosperms and angiosperms. A seed generally consists of three parts: the seed coat, the embryo, and the endosperm. However, some plants' mature seeds only have the seed coat and the embryo. In agricultural production, seed pretreatment before sowing is a crucial step in ensuring crop yield and quality. Seed sorting (or cleaning) is the primary step. This process aims to remove small, shriveled, broken, and impurities mixed in with the batch based on physical characteristics (such as size, specific gravity, and plumpness), thereby obtaining high-purity, high-vitality, high-quality seeds.

[0003] In small-scale family farming, screening legume or cereal seeds is a common need. Due to the limited total amount of seeds that can be processed, simple rotary screens are usually used for screening. Existing horizontal screen equipment mainly relies on the natural tumbling of seeds during rotation for screening. However, it has a significant drawback: impurities larger than the screen openings (such as branches and stones) lack effective axial pushing force inside the screen and are difficult to move automatically to the discharge port, thus remaining inside the screen. Therefore, manual cleaning is often required after screening, which not only increases labor intensity but also seriously affects the continuity and overall efficiency of the screening operation. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a portable seed sorting device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a portable seed sorting device, including: a mobile frame, wherein the mobile frame is provided with a feeding chamber, a screening chamber and a discharging chamber that are isolated from each other, and a horizontal bar is provided inside the mobile frame that runs through each chamber;

[0007] A screen cylinder is rotatably mounted inside a movable frame and coaxially distributed with the crossbar. A drive unit for driving the screen cylinder to rotate is installed inside the movable frame.

[0008] A reciprocating stirring mechanism, comprising:

[0009] A cam assembly, which is coaxially arranged with the screen cylinder and rotates synchronously with it;

[0010] A slide rod is slidably arranged along the axial direction of the crossbar. One end of the slide rod is provided with a mating end that cooperates with the cam assembly. Multiple sets of stirring rods are arranged side by side on the slide rod.

[0011] A spring is disposed at the end of the slide bar away from the mating end, and the spring is connected to the crossbar;

[0012] When the drive unit drives the screen cylinder to rotate, the cam assembly rotates accordingly. The cam assembly periodically pushes the mating end of the slide rod to overcome the elastic force of the spring, causing the slide rod and the stirring rod on it to reciprocate along the axial direction of the crossbar.

[0013] Preferably, the cam assembly includes:

[0014] A collar, wherein the collar is connected to the inner circumference of the screen cylinder via a connecting rod;

[0015] A protrusion is disposed on the annular surface of the collar, and the protrusion smoothly transitions with the surface of the collar;

[0016] The sliding rod has a roller that is rotatably mounted on it, and the roller makes rolling contact with the surface of the protrusion.

[0017] Preferably, the stirring rod has an inverted T-shaped structure;

[0018] A fan-shaped groove is provided on the slide bar, and the fan-shaped groove has a vertically arranged side wall;

[0019] The top end of the stirring rod is hinged to the central area of ​​the fan-shaped groove, so that its bottom end can swing around the hinge point.

[0020] When the slide bar drives the stirring rod to move towards the discharge bin, the upper end of the stirring rod abuts against the vertical side wall of the fan-shaped groove, thereby axially pushing the material.

[0021] When the slide bar returns to its original position towards the feed hopper, the bottom end of the stirring rod swings under the action of material resistance, forming a gap for the material to pass through.

[0022] Preferably, the screen cylinder is an integral structure, which is sequentially connected along its axial direction to form: a feed hopper located in the feed bin; a sorting cylinder located in the screening bin; and a discharge pipe located in the discharge bin;

[0023] The feed hopper is funnel-shaped, and its inner diameter gradually decreases in the direction away from the sorting cylinder;

[0024] At the bottom of the screening chamber, and below the sorting cylinder, there is a discharge hopper for receiving the screened material.

[0025] Preferably, the drive unit includes:

[0026] The motor is fixedly mounted on the inner wall of the movable frame;

[0027] A drive pulley, which is connected to the output shaft of the motor;

[0028] The driven pulley is coaxially and fixedly connected to the screen cylinder, and the driven pulley is connected to the driving pulley by a transmission belt.

[0029] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0030] This invention combines the rotational motion of the screen cylinder with the axial reciprocating motion of the stirring rod to form a compound stirring mechanism. This design effectively prevents seeds from clogging the screen holes, ensuring full contact between the seeds and the screen holes, thereby significantly improving the thoroughness and efficiency of screening. The stirring rod adopts a unique T-shaped hinge structure, creating a unidirectional pushing effect during reciprocating motion. It pushes the material forward and allows the material to pass through when it retracts. When the mixture of seeds and large particles of impurities is fed into the screen cylinder from the feed end, the stirring rod simultaneously stirs and pushes the mixture gradually towards the discharge end inside the screen cylinder. During this movement, the seeds gradually pass through the screen holes and fall, while large particles of impurities are retained inside the screen cylinder and continue to move towards the discharge end until they are discharged from the screen cylinder. This allows impurities in the screen cylinder to be discharged in a timely manner, achieving automatic screening and discharge without affecting the continuity of seed processing. The reciprocating stirring mechanism and the screen cylinder share the same power source, and the reciprocating stirring mechanism is driven by a built-in cam assembly. This integrated design eliminates the need for an additional drive device, making the overall structure more compact and simple, and improving the portability of the equipment. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the internal structure of the mobile frame in an embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the sieve cylinder in an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the internal structure of the sieve cylinder in an embodiment of the present invention;

[0036] The labels in the diagram represent: 1. Moving frame; 11. Crossbar; 12. Discharge hopper; 2. Screen cylinder; 21. Feed hopper; 22. Sorting cylinder; 23. Discharge pipe; 3. Reciprocating stirring mechanism; 30. Cam assembly; 301. Collar; 302. Protrusion; 31. Slide rod; 311. Mating end; 32. Stirring rod; 33. Spring. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0038] The present invention will be further described below with reference to the embodiments.

[0039] Example:

[0040] Please see Figures 1-4 This utility model provides a technical solution: a portable seed sorting device, comprising: a movable frame 1, a sieve cylinder 2, and a reciprocating stirring mechanism 3;

[0041] The movable frame 1 has an internally isolated feeding bin, screening bin and discharging bin, and the movable frame 1 has a horizontal crossbar 11 that runs through each bin.

[0042] The screen cylinder 2 is rotatably mounted inside the movable frame 1 and is coaxially distributed with the crossbar 11. The movable frame 1 is equipped with a drive unit for driving the screen cylinder 2 to rotate.

[0043] Specifically, the sieve cylinder 2 is equipped with sieve holes, the diameter of which can be precisely designed according to the type of seeds to be processed. In order to achieve effective separation, the size of the sieve holes is configured to be slightly larger than the size of the standard seeds of the variety, so as to ensure that qualified seeds can fall smoothly, while large particles of impurities larger than the sieve holes are effectively intercepted.

[0044] Furthermore, the movable frame 1 is provided with a feed pipe, one end of which passes through the movable frame 1 and extends into the interior of the screen cylinder 2.

[0045] The reciprocating stirring mechanism 3 includes a cam assembly 30, a slide bar 31, and a spring 33;

[0046] The cam assembly 30 is coaxially arranged with the sieve cylinder 2 and rotates synchronously with it. The slide rod 31 is slidably arranged along the axis of the cross rod 11. One end of the slide rod 31 is provided with a mating end 311 that cooperates with the cam assembly 30. Multiple sets of stirring rods 32 are arranged side by side on the slide rod 31. The spring 33 is located at the end of the slide rod 31 away from the mating end 311, and the spring 33 is connected to the cross rod 11.

[0047] When the drive unit drives the screen cylinder 2 to rotate, the cam assembly 30 rotates accordingly. The cam assembly 30 periodically pushes the mating end 311 of the slide rod 31 to overcome the elastic force of the spring 33, so that the slide rod 31 and the stirring rod 32 on it reciprocate along the axial direction of the cross rod 11.

[0048] Specifically, the drive unit is first started, driving the screen cylinder 2 to rotate around the axis within the moving frame 1; the seeds to be screened are fed into the screen cylinder 2 from the feed hopper; the rotating inner wall of the screen cylinder 2 causes the seeds to tumble continuously; at the same time, the stirring rod 32 fixed on the slide rod 31 agitates the seeds, and the two work together to make the seeds mix more evenly, effectively preventing the screen holes from clogging and ensuring that the qualified seeds can pass through the screen holes on the screen cylinder 2 efficiently; the cam assembly 30, which rotates synchronously with the screen cylinder 2, periodically pushes the mating end 311 of the slide rod 31, causing it to overcome the elastic force of the spring 33 and make a reciprocating linear motion along the axis of the cross rod 11. This motion drives the stirring rod 32 to apply an axial thrust towards the discharge hopper while stirring the material in the cylinder; finally, the qualified seeds and impurities are separated: the qualified seeds are sorted out through the screen holes, while impurities larger than the screen holes (such as branches, leaves, stones, etc.) are retained in the screen cylinder 2 and continuously transported to the discharge hopper under the action of the axial thrust, and finally automatically discharged from the discharge port.

[0049] Furthermore, the cam assembly 30 includes a collar 301 and a protrusion 302; the collar 301 is connected to the inner circumferential surface of the screen cylinder 2 via a connecting rod, and the protrusion 302 is disposed on the annular surface of the collar 301, with the protrusion 302 smoothly transitioning to the surface of the collar 301.

[0050] Among them, the mating end 311 on the slide rod 31 is a roller rotatably mounted on the slide rod 31, and the roller forms a rolling contact with the surface of the protrusion 302.

[0051] Specifically, the collar 301 rotates synchronously with the rotation of the screen cylinder 2, and the protrusion 302 on the collar 301 periodically squeezes the roller on the slide rod 31, thereby realizing the axial reciprocating movement of the slide rod 31.

[0052] Furthermore, the stirring rod 32 has an inverted T-shaped structure, and a fan-shaped groove is provided on the slide rod 31. The fan-shaped groove has a vertically arranged side wall. The top end of the stirring rod 32 is hinged to the central area of ​​the fan-shaped groove, so that its bottom end can swing around the hinge point.

[0053] When the slide bar 31 drives the stirring bar 32 to move towards the discharge bin, the upper end of the stirring bar 32 abuts against the vertical side wall of the fan-shaped groove, thus axially pushing the material; when the slide bar 31 returns to the feed bin, the bottom end of the stirring bar 32 swings under the action of material resistance, forming a gap for the material to pass through.

[0054] Furthermore, the screen cylinder 2 is an integral structure, which is connected in sequence along its axial direction to form: a feed hopper 21 located in the feed bin; a sorting cylinder 22 located in the screening bin; and a discharge pipe 23 located in the discharge bin;

[0055] The feed hopper 21 is funnel-shaped, and its inner diameter gradually decreases in the direction away from the sorting cylinder 22. At the bottom of the screening chamber and below the sorting cylinder 22, there is a discharge hopper 12 for receiving the screened material. The seeds to be sorted are put into the screen cylinder 2 from the port of the feed hopper 21. The funnel-shaped feed hopper 21 prevents the seeds from falling out of the feed port of the screen cylinder 2.

[0056] Furthermore, the movable frame 1 is also equipped with a fan, which is located below the screen cylinder 2, and its air outlets are distributed along the discharge port of the discharge hopper 12. A collection box for collecting seeds is placed below the discharge hopper 12.

[0057] Specifically, in the size screening stage, the sorting cylinder 22 of the sieve cylinder 2 is equipped with sieve holes, the diameter of which is precisely designed to be slightly larger than the size of standard seeds. This design ensures that seeds of acceptable size and smaller impurities (such as dust and shriveled seeds) can pass through the sieve holes and fall, while larger particles of impurities (such as stones and twigs) larger than the sieve holes are trapped inside the sieve cylinder 2. In the air separation stage, for the mixture falling through the sieve holes, the fan inside the moving frame 1 is activated to generate a directional airflow. This airflow performs secondary sorting of the falling material based on density and weight: lighter dust and shriveled seeds, due to their low suspension velocity, are blown away from their original falling trajectory by the airflow; while heavier qualified seeds are less affected by the airflow and basically remain vertically falling. Finally, qualified seeds fall precisely into the collection box below, while dust and light, undesirable seeds are blown to the collection area on the other side, achieving separation.

[0058] Furthermore, the drive unit includes a motor, a drive pulley, and a driven pulley; the motor is fixedly installed on the inner wall of the movable frame 1, the drive pulley is connected to the output shaft of the motor, the driven pulley is coaxially fixedly connected to the screen cylinder 2, and the driven pulley and the drive pulley are connected by a transmission belt.

[0059] Specifically, the motor starts and drives the drive pulley to rotate. The drive pulley is connected to the driven pulley via a transmission belt. The driven pulley drives the screen cylinder 2 to rotate around the crossbar 11 inside the moving frame 1.

[0060] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A portable seed sorting device, characterized in that, include: The mobile frame (1) is equipped with a feeding bin, a screening bin and a discharging bin that are isolated from each other. The mobile frame (1) is equipped with a horizontal bar (11) that runs through each bin. The screen cylinder (2) is rotatably disposed inside the movable frame (1) and coaxially distributed with the crossbar (11). The movable frame (1) is provided with a drive unit for driving the screen cylinder (2) to rotate. A reciprocating stirring mechanism (3), the reciprocating stirring mechanism (3) comprising: Cam assembly (30), which is coaxially arranged with the screen cylinder (2) and rotates synchronously with it; The slide rod (31) is slidably arranged along the axial direction of the cross bar (11). One end of the slide rod (31) is provided with a mating end (311) that cooperates with the cam assembly (30). Multiple sets of stirring rods (32) are arranged side by side on the slide rod (31). A spring (33) is disposed at the end of the slide bar (31) away from the mating end (311), and the spring (33) is connected to the crossbar (11). When the drive unit drives the screen cylinder (2) to rotate, the cam assembly (30) rotates accordingly. The cam assembly (30) periodically pushes the mating end (311) of the slide rod (31) to overcome the elastic force of the spring (33), so that the slide rod (31) and the stirring rod (32) on it reciprocate along the axial direction of the crossbar (11).

2. The portable seed sorting device according to claim 1, characterized in that: The cam assembly (30) includes: A collar (301) is connected to the inner circumference of the screen cylinder (2) via a connecting rod; A protrusion (302) is provided on the annular surface of the collar (301), and the protrusion (302) smoothly transitions to the surface of the collar (301); The mating end (311) on the slide rod (31) is a roller rotatably mounted on the slide rod (31), and the roller forms a rolling contact with the surface of the protrusion (302).

3. The portable seed sorting device according to claim 1, characterized in that: The stirring rod (32) has an inverted T-shaped structure; A fan-shaped groove is provided on the slide rod (31), and the fan-shaped groove has a vertically arranged side wall; The top end of the stirring rod (32) is hinged to the central area of ​​the fan-shaped groove, so that its bottom end can swing around the hinge point; When the slide bar (31) drives the stirring bar (32) to move towards the discharge bin, the upper end of the stirring bar (32) abuts against the vertical side wall of the fan-shaped groove to push the material axially. When the slide bar (31) returns to its original position in the direction of the feed hopper, the bottom end of the stirring rod (32) swings under the action of material resistance, forming a gap for the material to pass through.

4. The portable seed sorting device according to claim 1, characterized in that: The screen cylinder (2) is an integral structure, which is connected in sequence along its axial direction to form: a feed hopper (21) located in the feed bin; a sorting cylinder (22) located in the screening bin; and a discharge pipe (23) located in the discharge bin. The feed hopper (21) is funnel-shaped, and its inner diameter gradually decreases in the direction away from the sorting cylinder (22); At the bottom of the screening chamber, and below the sorting cylinder (22), there is a discharge hopper (12) for receiving the screened material.

5. A portable seed sorting device according to claim 1, characterized in that: The drive unit includes: The motor is fixedly installed on the inner wall of the movable frame (1); A drive pulley, which is connected to the output shaft of the motor; The driven pulley is coaxially and fixedly connected to the screen cylinder (2), and the driven pulley is connected to the driving pulley by a transmission belt.

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