Seed sorting device

Abstract

The utility model relates to a seed sorting device. The seed sorting device comprises a seed discharging mechanism and a transmission mechanism, the seed metering mechanism comprises a seed metering wheel and a driving part; a seed metering groove is formed in the circumferential surface of the seed metering wheel, and the driving part is connected to the seed metering wheel and used for driving the seed metering wheel to rotate. And the transmission mechanism is arranged below the seed metering wheel along the gravity direction. Wherein the maximum length of the notch of the seed-metering groove is smaller than the depth of the seed-metering groove. According to the seed sorting device, the seed posture control efficiency can be improved, and the seed screening accuracy can be improved.

Description

Technical Field

[0001] This application relates to the field of seed sorting technology, and in particular to seed sorting apparatus. Background Technology

[0002] With economic development, the production and circulation of seeds are constantly increasing. Seed sorting is a crucial step in ensuring seed quality and promoting the industrialization of the seed industry. In the process of modernizing maize seed breeding, using haploid technology to obtain pure lines and then selecting inbred lines can accelerate the breeding process and improve breeding efficiency. Rapidly and non-destructively identifying haploid grains from polyploid grains has become the key to haploid breeding technology.

[0003] Existing seed sorting devices include a feeding mechanism and a conveying mechanism. The feeding mechanism is equipped with slots for holding corn seeds. Specifically, corn seeds are placed in the slots of the feeding mechanism. By rotating the feeding mechanism, the corn seeds in the slots are discharged onto the conveying mechanism, where a detection device then detects and sorts the corn seeds.

[0004] However, in the process of corn seed testing, the orientation of the corn seed is a key factor affecting its testing efficiency. How to effectively control the orientation of the corn seed during the transfer of the corn seed in the eye to the conveying mechanism, thereby improving the corn seed screening efficiency, has become one of the technical problems that urgently need to be solved in the existing technology. Utility Model Content

[0005] Therefore, it is necessary to provide a seed sorting device to solve the problem of low efficiency in controlling the attitude of corn seeds during the corn seed transport process, which affects the sorting accuracy of corn seeds.

[0006] A seed sorting device, comprising:

[0007] The seed metering mechanism includes a seed metering wheel and a drive component; the circumferential surface of the seed metering wheel is provided with a seed metering groove, and the drive component is connected to the seed metering wheel to drive the seed metering wheel to rotate;

[0008] The transmission mechanism is located below the seed metering wheel along the direction of gravity;

[0009] The maximum length of the opening of the seed metering trough is less than the depth of the seed metering trough.

[0010] In some embodiments, the maximum length of the opening of the seed metering trough is A, and the depth of the seed metering trough is B;

[0011] Where 1.05≤A / B≤1.15.

[0012] In some embodiments, along the depth direction of the seed metering trough, the orthographic projection of the inner wall of the seed metering trough lies within the orthographic projection of the opening of the seed metering trough.

[0013] In some embodiments, along the rotation direction of the seed metering wheel, the direction from the bottom of the seed metering trough to the center of the seed metering trough opening intersects the direction from the center of the seed metering wheel to the center of the seed metering trough opening, and the bottom of the seed metering trough is located on the side of the extension line from the center of the seed metering trough opening to the center of the seed metering wheel that is away from the rotation direction of the seed metering wheel.

[0014] In some embodiments, the seed metering trough includes a first inner wall and a second inner wall, which are correspondingly arranged along a direction intersecting the depth direction of the seed metering trough;

[0015] The surface area of ​​the first inner wall is greater than the surface area of ​​the second inner wall;

[0016] The first and second inner walls are arranged along the rotation direction of the seed metering wheel.

[0017] In some embodiments, the seed metering trough further includes a third inner wall, a fourth inner wall, and a fifth inner wall;

[0018] The fourth inner wall is connected between the third inner wall and the fifth inner wall. The third inner wall is connected between the circumferential surface of the seed metering wheel and the side of the fourth inner wall away from the fifth inner wall. The fifth inner wall is connected between the circumferential surface of the seed metering wheel and the side of the fourth inner wall away from the third inner wall.

[0019] The direction of the protrusion of the third inner wall is opposite to that of the fourth inner wall, and the direction of the protrusion of the fifth inner wall is opposite to that of the fourth inner wall.

[0020] In some embodiments, there are multiple seed metering troughs, which are evenly and spaced apart along the circumference of the seed metering wheel.

[0021] In some embodiments, the transmission mechanism includes:

[0022] The conveyor body is located below the seed metering wheel along the direction of gravity; the side of the conveyor body facing the seed metering wheel has a curved surface, there is a gap between the seed metering wheel and the curved surface, and the curved surface protrudes along the direction from the seed metering wheel to the conveyor body.

[0023] In some embodiments, the seed sorting device further includes:

[0024] The constraint mechanism extends along the circumferential outer wall of the seed metering wheel, and the constraint mechanism abuts against the circumferential outer wall of the seed metering wheel on the side away from the transmission mechanism along the direction of gravity of the seed metering wheel.

[0025] In some embodiments, the seed sorting device further includes:

[0026] The seed brush is positioned above the seed metering wheel along the direction of gravity. The seed brush is in contact with the circumferential outer wall of the seed metering wheel and is used to brush away excess seeds protruding from the surface of the seed metering wheel in the seed metering groove.

[0027] The aforementioned seed sorting device includes a seed metering mechanism and a transmission mechanism. The seed metering mechanism includes a seed metering wheel and a driving component. The circumferential surface of the seed metering wheel has a seed metering groove, and the driving component is connected to the seed metering wheel to drive its rotation. The transmission mechanism is located below the seed metering wheel along the direction of gravity. The maximum length of the opening of the seed metering groove is less than the depth of the seed metering groove.

[0028] The seed sorting device of this application places seeds in the seed dispensing groove of a seed dispensing wheel. During the rotation of the seed dispensing wheel driven by a drive component, the position of the seed dispensing groove changes, thereby discharging the seeds to a transmission mechanism. A detection device then detects and sorts the seeds transmitted to the transmission mechanism. Because the maximum length of the seed dispensing groove opening is less than the depth of the seed dispensing groove, when a seed is placed in the groove, its orientation relative to the groove is such that the seed's extension direction is along the depth direction of the seed dispensing groove, meaning the seed is vertically positioned within the groove. This improves the efficiency of seed orientation control and increases the accuracy of seed sorting. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the seed sorting device in one embodiment of this application.

[0030] Figure 2 for Figure 1 A partial cross-sectional view of the seed sorting device along the AA direction.

[0031] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0032] Figure 4 This is a schematic diagram of the structure for placing seeds in a seed sorting device according to an embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the seeding reel in one embodiment of this application.

[0034] Figure 6 This is a schematic diagram of another structure of the seeding reel in one embodiment of this application.

[0035] Figure 7 This is a schematic diagram of another structure of the seeding reel in one embodiment of this application.

[0036] Figure 8 This is a schematic diagram of another structure of the seeding reel in one embodiment of this application.

[0037] Figure 9 This is a schematic diagram of another structure of the seeding reel in one embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Seed sorting device; 2. Seeds;

[0040] 11. Seeding mechanism; 12. Transmission mechanism; 13. Constraint mechanism; 14. Seed brush;

[0041] 111. Seed rotation;

[0042] 1111, Seed metering trough; 1112, First inner wall; 1113, Second inner wall; 1114, Third inner wall; 1115, Fourth inner wall; 1116, Fifth inner wall;

[0043] 121. Teleport the main body. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that in applications of phenotypic detection of crop fruits or seeds, the orderly arrangement of the target objects and the seed orientation during detection are key factors affecting the quality and throughput of phenotypic detection. For example, in the technology of haploid screening of maize kernels, the effective identification surface for phenotypic detection of maize kernels is the germ surface. Therefore, controlling the continuous and orderly arrangement of maize kernels with the germ surface facing upward will effectively ensure the efficiency and accuracy of maize kernel haploid screening.

[0050] In related technologies, seed sorting devices include a feeding mechanism and a conveying mechanism. The feeding mechanism is equipped with slots for holding corn seeds. Specifically, corn seeds are placed in the slots of the feeding mechanism. The feeding mechanism rotates, discharging the corn seeds from the slots onto the conveying mechanism. A detection device then detects and sorts the corn seeds conveyed to the conveying mechanism. Seed identification and classification are based on embryo surface features, and the efficiency of identification is strongly correlated with the proportion of embryo surface that can be observed.

[0051] However, in related technologies, to facilitate the removal of excess corn kernels from the seed holes, the seed holes of the feeding mechanism are shaped like waist-shaped openings. After passing through the brush inside the seed holes, the corn kernels lie horizontally. Simultaneously, the bottom of the seed hole is arc-shaped, conforming to the shape of the back of the corn kernel. When the seed hole rotates above the conveyor mechanism, the germ surface of the corn kernel falls onto the plane of the conveyor mechanism with a more downward orientation, causing the germ surface of the corn kernel to deviate from the detection device, affecting the accuracy of corn seed screening.

[0052] See Figure 1 , Figure 2 and Figure 3 As shown. One embodiment of this application provides a seed sorting device 1, including a seed metering mechanism 11 and a transmission mechanism 12. See also... Figure 4 and Figure 5 As shown, the seed metering mechanism 11 includes a seed metering wheel 111 and a driving component (not shown in the figure). The circumferential surface of the seed metering wheel 111 is provided with a seed metering groove 1111. The driving component is connected to the seed metering wheel 111 and is used to drive the seed metering wheel 111 to rotate. The transmission mechanism 12 is located below the seed metering wheel 111 along the direction of gravity. The maximum length of the opening of the seed metering groove 1111 is less than the depth of the seed metering groove 1111.

[0053] It should be noted that the seed sorting device 1 in this application can be used not only to screen corn seeds 2, but also to transport and screen fruits or seeds 2 of any crop. The above description is only based on corn seeds 2 as an example. The application scope of the seed sorting device 1 in this application will not be elaborated here.

[0054] Similarly, it should be noted that the corn seeds 2 and corn kernels mentioned above refer to either corn seeds 2 or fruits. For ease of explanation, this application uses the concept of "seed" as an example. The embryo surface of seed 2 refers to the collective term for the plumule, hypocotyl, radicle, and cotyledons of seed 2. The embryo is the main part of seed 2 and will develop into a new plant. In this application, for ease of explanation and understanding, since the seed sorting device 1 needs to screen the seeds 2 after transferring them to the transmission mechanism 12, and the main basis for screening is the identification of the embryo surface, the embryo surface in this application refers to the identification surface of seed 2 detected by the detection device.

[0055] It is understandable that, because the embryo inside seed 2 requires space during development, the side with the embryo protrudes, thus making the side of seed 2 with the embryo concave relative to the side without the embryo, as described in this application. Figure 4 As shown, the embryo surface of seed 2 is defined as the surface on the concave side, and the non-embryo surface of seed 2 is defined as the surface on the convex side.

[0056] It should be added that, Figure 3 and Figure 4 The X direction in the diagram represents the rotation direction of the seeding reel 111. Figure 3 and Figure 4 The Y direction in the figure represents the direction of gravity of the seeding reel 111.

[0057] Specifically, the driving component, as the power element of the seed metering mechanism 11, drives the seed metering wheel 111 to rotate, thereby changing the relative position of the seed metering groove 1111. Since the transmission mechanism 12 is located below the seed metering wheel 111 along the direction of gravity, when the seed 2 is placed in the seed metering groove 1111 of the seed metering wheel 111, during the process of driving the seed metering wheel 111 to rotate by the driving component, when the seed metering groove 1111 moves to the top of the transmission mechanism 12 and the opening direction of the seed metering groove 1111 faces the transmission mechanism 12, the seed 2 can be discharged to the transmission mechanism 12 by changing the position of the seed metering groove 1111. Then, the seed 2 transmitted to the transmission mechanism 12 can be detected and screened by the detection device.

[0058] Furthermore, since the maximum length of the opening of the seed metering trough 1111 is less than the depth of the seed metering trough 1111, when the seed 2 is placed in the seed metering trough 1111, the orientation of the seed 2 relative to the seed metering trough 1111 is as follows: the extension direction of the seed 2 is along the depth direction of the seed metering trough 1111, that is, the seed 2 is in a vertical position relative to the seed metering trough 1111 and is located in the seed metering trough 1111. When the seed 2 comes out of the seed metering trough 1111, the seed 2 will tilt from the side. It is understandable that, since the embryo surface of seed 2 is located on the side of the non-embryonic surface of seed 2 facing the rotation direction of the seed metering wheel 111, during the process of seed 2 being discharged from the seed metering trough 1111, the embryo surface of seed 2 is more likely to be located on the surface away from the transmission mechanism 12 than the non-embryonic surface of seed 2. That is, along the direction of gravity of the transmission mechanism 12, the probability that the embryo surface of seed 2 is facing the opposite direction of gravity of the transmission mechanism 12 is higher. This can improve the control efficiency of the attitude of seed 2, make it easier for the detection device to capture the embryo surface of seed 2, and ultimately improve the efficiency of the detection device in phenotypic detection and haploid identification of seed 2, and improve the screening accuracy of seed 2.

[0059] It should be noted that, for ease of explanation, the direction above represents the opposite of gravity, and the direction below represents the direction of gravity.

[0060] Through the above embodiments of this application, the applicant has conducted Discrete Element Method (DEM) simulations and actual tests on the related technologies and the above embodiments of this application. Table 1 below shows the test data of the probability of seed 2 embryo facing upwards in the related technologies and the probability of seed 2 embryo facing upwards in this application:

[0061] Table 1. Probability of seed embryo face upward in related technologies and probability of seed embryo face upward in this application.

[0062]

[0063] Based on the above tests, in the DEM simulation test, the probability of seed 2 embryo facing upwards in the related technology is 26%-29%, while the probability of seed 2 embryo facing upwards in this application is 42%-45%. In the actual test, the probability of seed 2 embryo facing upwards in the related technology is 34%, while the probability of seed 2 embryo facing upwards in this application is 42%. That is, this application can improve the control efficiency of seed 2 attitude and improve the screening accuracy of seed 2.

[0064] In some embodiments, the maximum length of the opening of the seed metering trough 1111 is A, and the depth of the seed metering trough 1111 is B. Wherein, 1.05≤A / B≤1.15.

[0065] It should be noted that 1.05≤A / B≤1.15, that is, the minimum ratio of A / B is 1.05, the maximum ratio of A / B is 1.15, and the ratio of A / B can be any value between 1.05 and 1.15.

[0066] Thus, since 1.05≤A / B≤1.15, the ratio between the maximum length of the opening of the seed metering trough 1111 and the depth of the seed metering trough 1111 can be ensured to be closer to the ratio between the length and width of the seed 2. This can further increase the probability that the seed 2 is in a vertical position relative to the seed metering trough 1111 when it is placed in the seed metering trough 1111, thereby further improving the control efficiency of the seed 2's posture and further improving the screening accuracy of the seed 2.

[0067] Furthermore, in this embodiment, different seed metering wheels 111 can be used to adapt to different types or batches of seeds 2. The different seed metering wheels 111 have different specifications of seed metering grooves 1111. Specifically, the corresponding seed metering wheel 111 is selected based on the size statistics of the seeds to be sorted. The maximum length A and depth B of the seed metering groove 1111 of the seed metering wheel 111 respectively satisfy the following conditions:

[0068] A=L max +Δl;

[0069] B=W max -Δw;

[0070] Among them, L max W represents the maximum statistical length of the seeds to be sorted. max Δl is the maximum statistical width of the seeds to be sorted, Δl is the adjustment gap between the seeds to be sorted and the depth direction of the seed metering trough 1111, and Δw is the adjustment gap between the seeds to be sorted and the inner circumferential direction of the seed metering trough 1111. Preferably, 2.0mm≤Δl≤2.7mm and 0.7mm≤Δw≤0.8mm.

[0071] In some embodiments, seeFigure 5 As shown, along the depth direction of the seed metering trough 1111, the orthographic projection of the inner wall of the seed metering trough 1111 is located within the orthographic projection of the opening of the seed metering trough 1111.

[0072] It should be noted that if the orthographic projection of the inner wall of the seed metering groove 1111 is located outside the orthographic projection of the groove opening of the seed metering groove 1111 along the depth direction, that is, the seed metering groove 1111 is pear-shaped, then when the seed 2 is placed in the seed metering groove 1111, even if the maximum length of the groove opening of the seed metering groove 1111 is less than the depth of the seed metering groove 1111, the seed 2 still has a high probability of lying horizontally in the seed metering groove 1111. When the seed metering groove 1111 rotates to the top of the transmission mechanism 12, the embryo surface of the seed 2 falls more downward on the plane of the transmission mechanism 12, which causes the embryo surface of the seed 2 to move away from the detection device, affecting the screening accuracy of the seed 2.

[0073] Since the orthographic projection of the inner wall of the seed metering groove 1111 is located within the orthographic projection of the groove opening of the seed metering groove 1111 along the depth direction of the seed metering groove 1111, the probability of the seed 2 being in a vertical position relative to the seed metering groove 1111 is further increased, thereby further improving the control efficiency of the seed 2's posture and further improving the screening accuracy of the seed 2.

[0074] In some embodiments, see Figure 6 As shown, along the rotation direction of the seed metering wheel 111, the direction from the bottom of the seed metering trough 1111 to the center of the opening of the seed metering trough 1111 intersects the direction from the center of the seed metering wheel 111 to the center of the opening of the seed metering trough 1111, and the bottom of the seed metering trough 1111 is located on the side of the extension line from the center of the opening of the seed metering trough 1111 to the center of the seed metering wheel 111 that is away from the rotation direction of the seed metering wheel 111.

[0075] It should be noted that, Figure 6 In this context, direction M is the direction from the bottom of seed metering trough 1111 to the center of the opening of seed metering trough 1111. Figure 6 The N direction is the direction from the center of the seed metering wheel 111 to the center of the opening of the seed metering trough 1111.

[0076] Thus, since the direction from the bottom of the seed metering trough 1111 to the center of its opening intersects with the direction from the center of the seed metering wheel 111 to the center of its opening along the rotation direction of the seed metering wheel 111, and the bottom of the seed metering trough 1111 is located on the side opposite to the rotation direction of the seed metering wheel 111, that is, when the seed metering trough 1111 rotates to the top of the transmission mechanism 12 and the opening of the seed metering trough 1111 faces the transmission mechanism 12... The embryo surface of seed 2 is inclined to the surface of transmission mechanism 12, and at this time, the embryo surface of seed 2 is located on the side away from the surface of transmission mechanism 12 relative to the non-embryo surface of seed 2. That is, at this time, the embryo surface of seed 2 is located above the non-embryo surface of seed 2, so that the non-embryo surface of seed 2 can preferentially contact the surface of transmission mechanism 12, thereby further increasing the probability that the embryo surface of seed 2 is facing upward, and further improving the control efficiency of the attitude of seed 2, and further improving the screening accuracy of seed 2.

[0077] In some embodiments, see Figure 7 As shown, the seed metering trough 1111 includes a first inner wall 1112 and a second inner wall 1113, which are correspondingly arranged along a direction intersecting the depth direction of the seed metering trough 1111. The surface area of ​​the first inner wall 1112 is larger than the surface area of ​​the second inner wall 1113. The first inner wall 1112 and the second inner wall 1113 are arranged along the rotation direction of the seed metering wheel 111.

[0078] It should be noted that, Figure 7 The vertical dotted line in the diagram represents the depth direction of the seed trough 1111.

[0079] Thus, since the surface area of ​​the first inner wall 1112 is larger than that of the second inner wall 1113, and the first inner wall 1112 and the second inner wall 1113 are arranged along the rotation direction of the seed metering wheel 111, the non-embryo surface of the seed 2 can have a larger contact area with the first inner wall 1112. This ensures that the non-embryo surface of the seed 2 is always in contact with the first inner wall 1112 within the seed metering trough 1111. Consequently, during the process of the seed 2 being discharged from the seed metering trough 1111, the non-embryo surface of the seed 2 can preferentially contact the surface of the transmission mechanism 12, thereby improving the control efficiency of the seed 2's posture and further improving the screening accuracy of the seed 2.

[0080] In some embodiments, see Figure 8As shown, the seed metering trough 1111 further includes a third inner wall 1114, a fourth inner wall 1115, and a fifth inner wall 1116. The fourth inner wall 1115 connects the third inner wall 1114 and the fifth inner wall 1116. The third inner wall 1114 connects the circumferential surface of the seed metering wheel 111 and the side of the fourth inner wall 1115 away from the fifth inner wall 1116. The fifth inner wall 1116 connects the circumferential surface of the seed metering wheel 111 and the side of the fourth inner wall 1115 away from the third inner wall 1114. The protruding direction of the third inner wall 1114 is opposite to the protruding direction of the fourth inner wall 1115, and the protruding direction of the fifth inner wall 1116 is opposite to the protruding direction of the fourth inner wall 1115.

[0081] Thus, since the protrusion direction of the third inner wall 1114 is opposite to that of the fourth inner wall 1115, and the protrusion direction of the fifth inner wall 1116 is also opposite to that of the fourth inner wall 1115, on the one hand, during the process of placing the seed 2 in the seed metering groove 1111, the third inner wall 1114 or the fourth inner wall 1115 can serve as a transition area for the seed 2, thereby facilitating the placement process of the seed 2; on the other hand, during the process of discharging the seed 2 from the seed metering groove 1111, the third inner wall 1114 or the fourth inner wall 1115 can serve as a transition area for the seed 2, thereby facilitating the contact between the non-embryo surface of the seed 2 and the transmission mechanism 12, thereby improving the control efficiency of the seed 2's posture, and facilitating the smooth discharge of the seed 2 from the seed metering groove 1111, ensuring the normal transmission and detection of the seed 2.

[0082] In some embodiments, see Figure 9 As shown, there are multiple seed metering troughs 1111, which are evenly and spaced apart along the circumference of the seed metering wheel 111.

[0083] In this way, multiple seeds 2 can be placed in multiple seed slots 1111 of the seed metering wheel 111 at the same time, thereby improving the transmission efficiency of the seeds 2, which in turn improves the efficiency of seed detection and screening, and improves the work efficiency of the operators.

[0084] In some embodiments, see Figure 3 and Figure 4 As shown, the transmission mechanism 12 includes a transmission body 121. The transmission body 121 is located below the seed metering wheel 111 along the direction of gravity; the side of the transmission body 121 facing the seed metering wheel 111 has a curved surface, there is a gap between the seed metering wheel 111 and the curved surface, and the curved surface protrudes along the direction from the seed metering wheel 111 to the transmission body 121.

[0085] Thus, since the conveying body 121 has a curved surface on the side facing the seed metering wheel 111, there is a gap between the seed metering wheel 111 and the curved surface, and the curved surface protrudes along the direction from the seed metering wheel 111 to the conveying body 121, the curved surface of the conveying body 121 can serve as a transition area for the seed 2 during the process of discharging the seed 2 in the seed metering groove 1111. At this time, the seed 2 is inclined relative to the curved surface of the conveying body 121, and the embryo surface of the seed 2 is located on the side away from the curved surface of the conveying body 121 relative to the non-embryo surface of the seed 2. That is, the embryo surface of the seed 2 is located above the non-embryo surface of the seed 2. This allows the non-embryo surface of the seed 2 to preferentially contact the curved surface of the conveying body 121, thereby further increasing the probability that the embryo surface of the seed 2 is facing upward, and further improving the control efficiency of the seed 2's attitude, and further improving the screening accuracy of the seed 2.

[0086] In some embodiments, see Figure 3 and Figure 4 As shown, the seed sorting device 1 also includes a constraint mechanism 13. The constraint mechanism 13 extends along the circumferential outer wall of the seed metering wheel 111, and the constraint mechanism 13 abuts against the center of the seed metering wheel 111 on the circumferential outer wall away from the transmission mechanism 12 along the direction of gravity of the seed metering wheel 111.

[0087] Thus, since the constraint mechanism 13 extends along the circumferential outer wall of the seed metering wheel 111, and the constraint mechanism 13 abuts against the circumferential outer wall of the seed metering wheel 111 on the side away from the transmission mechanism 12 along the direction of gravity of the seed metering wheel 111, the seed 2 just placed in the seed metering trough 1111 can be blocked by the constraint mechanism 13. This prevents the seed 2 from falling out of the seed metering trough 1111 before it reaches the position where the opening of the seed metering trough 1111 faces the transmission mechanism 12, under the action of centrifugal force and gravity, during the rotation of the seed metering trough 1111. Therefore, the blocking effect of the constraint mechanism 13 can ensure that the seed 2 in the seed metering trough 1111 is smoothly transferred to the transmission mechanism 12, thereby improving the reliability of the seed 2 transfer process.

[0088] In some embodiments, see Figure 3 and Figure 4 As shown, the seed sorting device 1 also includes a seed brush 14. The seed brush 14 is located above the seed metering wheel 111 along the direction of gravity, and the seed brush 14 is in contact with the circumferential outer wall of the seed metering wheel 111 to brush away excess seeds 2 protruding from the surface of the seed metering wheel 111 in the seed metering groove 1111.

[0089] Thus, since the seed brush 14 is located above the seed metering wheel 111 along the direction of gravity, and the seed brush 14 abuts against the circumferential outer wall of the seed metering wheel 111, it is used to brush away excess seeds 2 protruding from the surface of the seed metering wheel 111 in the seed metering groove 1111. This avoids the accumulation of multiple seeds 2 in the seed metering groove 1111. On the one hand, it can ensure the smooth transmission of seeds 2, thereby ensuring the detection and screening of seeds 2. On the other hand, it can improve the consistency of the number of seeds 2 in the seed metering groove 1111, thereby improving the accuracy of seed 2 detection by the subsequent detection device.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A seed sorting apparatus, characterized in that, The seed sorting device comprises: a seed-ejecting mechanism, comprising a seed-ejecting wheel and a driving member; a circumferential surface of the seed-ejecting wheel is provided with a seed-ejecting groove, and the driving member is connected to the seed-ejecting wheel for driving the seed-ejecting wheel to rotate; a transmission mechanism arranged below the seed-ejecting wheel along the direction of gravity; wherein the maximum length of the opening of the seed-ejecting groove is less than the depth of the seed-ejecting groove.

2. The seed sorting apparatus of claim 1, wherein, The maximum length of the opening of the seed-ejecting groove is A, and the depth of the seed-ejecting groove is B; wherein 1.05≤A / B≤1.

15.

3. The seed sorting apparatus of claim 1, wherein, In the depth direction of the seed-ejecting groove, the orthographic projection of the inner wall of the seed-ejecting groove is located within the orthographic projection of the opening of the seed-ejecting groove.

4. The seed sorting apparatus of claim 1, wherein, In the rotation direction of the seed-ejecting wheel, the direction from the bottom of the seed-ejecting groove to the center of the opening of the seed-ejecting groove intersects the direction from the center of the seed-ejecting wheel to the center of the opening of the seed-ejecting groove, and the bottom of the seed-ejecting groove is arranged on the side of the extension line from the center of the opening of the seed-ejecting groove to the center of the seed-ejecting wheel away from the rotation direction of the seed-ejecting wheel.

5. The seed sorting apparatus of claim 1, wherein, The seed-ejecting groove comprises a first inner wall and a second inner wall, which are correspondingly arranged in the direction intersecting the depth direction of the seed-ejecting groove; the surface area of the first inner wall is greater than that of the second inner wall; the first inner wall and the second inner wall are arranged in the rotation direction of the seed-ejecting wheel.

6. The seed sorting apparatus of claim 1, wherein The seed-ejecting groove further comprises a third inner wall, a fourth inner wall and a fifth inner wall; the fourth inner wall is connected between the third inner wall and the fifth inner wall, the third inner wall is connected between the circumferential surface of the seed-ejecting wheel and the side of the fourth inner wall away from the fifth inner wall, and the fifth inner wall is connected between the circumferential surface of the seed-ejecting wheel and the side of the fourth inner wall away from the third inner wall; the protruding direction of the third inner wall is opposite to that of the fourth inner wall, and the protruding direction of the fifth inner wall is opposite to that of the fourth inner wall.

7. The seed sorting apparatus of any of claims 1-6, wherein, The number of the seed-ejecting grooves is multiple, and the multiple seed-ejecting grooves are uniformly and interval arranged along the circumference of the seed-ejecting wheel.

8. The seed sorting apparatus of any of claims 1-6, wherein, The transmission mechanism comprises: a transmission body arranged below the seed-ejecting wheel along the direction of gravity; one side of the transmission body facing the seed-ejecting wheel is provided with a curved surface, the seed-ejecting wheel and the curved surface have a gap therebetween, and the curved surface protrudes in the direction from the seed-ejecting wheel to the transmission body.

9. The seed sorting apparatus of any of claims 1-6, wherein, The seed sorting device further comprises: a constraint mechanism extending along the circumferential outer wall of the seed-ejecting wheel, and the constraint mechanism abuts against the circumferential outer wall of the seed-ejecting wheel away from the transmission mechanism on the side of the seed-ejecting wheel along the direction of gravity.

10. The seed sorting apparatus of any of claims 1-6, wherein, The seed sorting device further comprises: a seed brush arranged above the seed-ejecting wheel along the direction of gravity, the seed brush abutting against the circumferential outer wall of the seed-ejecting wheel for brushing off the excess seeds protruding from the surface of the seed-ejecting wheel in the seed-ejecting groove.

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