A multifunctional seeding machine seed supply device
By using a bidirectional motor to drive the discharge roller and the cutting assembly in the seed supply device of the seed machine, the problems of inaccurate seed thickness control and uneven seed spacing in the prior art are solved, and efficient and accurate seeding effects are achieved.
Patent Information
- Application Number
- CN202510251461.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2045-03-05
AI Technical Summary
The existing seed supply device of seed machine cannot achieve precise control of seed thickness, resulting in low seed efficiency and uneven seed spacing, which affects the accuracy of seeds.
A multifunctional seed supply device is designed, and a two-way motor drives the discharge roller. Through the combination of the first and second fixed-end ports, the seed spacing is adjusted and the seed accuracy is improved. At the same time, the cutting assembly ensures uniform seeds falling from the same surface by combining the rotating plate and the lifting plate.
Through this device, the seeding spacing can be effectively adjusted, so as to improve seeding accuracy and efficiency, and avoid seed blockage and uneven flow.
Smart Images

Figure CN119732238B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of seed supply for a seeder, in particular to a multifunctional seed supply device for a seeder. Background Art
[0002] A seeder is a type of agricultural machinery that sows crop seeds. Seeders used for a certain type of crop are often named after the crop, such as grain drills, corn seed drills, cotton seed drills, and forage spreaders.
[0003] In the prior art, a Chinese patent with publication number "CN203735044U" discloses an automatic quantitative seed supply device for a precision seeder. The device is equipped with a transmission belt with grooves and a first sponge seed protection block and a second sponge seed protection block. When there are more seeds on the transmission belt, the first sponge seed protection block can effectively control the thickness of the seeds. The soft sponge material used has a low degree of damage to the seeds. When breeding in winter, the seeds will become wet due to the temperature difference, so that the seeds stick to the conveyor belt. The second sponge seed protection block can wipe the seeds off the conveyor belt, extending the working time of the seeder for seed supply at one time, greatly improving the sowing efficiency, and solving the problem that the existing seed supply device cannot achieve precise control of the seed thickness in the seed tray and cannot keep the seeds in the vibrating seed tray of the seeder in a "boiling" motion state at all times.
[0004] Some existing sowing equipment may cause seeds to be blocked in the discharge port or storage box due to different seed types or humidity changes, thus affecting the smoothness of sowing. At the same time, when sowing, due to the imprecise design of the discharge system, the seed spacing is easily uneven or the spacing cannot be adjusted, thus affecting the sowing accuracy. Summary of the invention
[0005] In view of the deficiencies in the prior art, the present invention provides a multifunctional seeding machine seed supply device, which solves the problems mentioned in the above background technology.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:
[0007] A multifunctional seeding machine seed supply device comprises a seed supply box, a storage box is fixedly installed on the upper end surface of the seed supply box, a rotating groove is arranged inside the seed supply box, a discharge port is arranged at the inner bottom of the rotating groove, a discharge pipe is fixedly connected to the discharge port, a feed port is arranged at the inner top of the rotating groove, and the seed supply box is fixedly connected to the storage box through the feed port;
[0008] A discharge assembly is provided inside the rotating trough, and the uniform discharge of seeds and the adjustment of the distance between them can be achieved through the discharge assembly;
[0009] The material storage box is provided with a material discharge assembly, through which the seeds in the material storage box are uniformly dropped into the material discharge assembly.
[0010] Preferably, the discharging assembly comprises a bidirectional motor fixedly mounted inside the seed supply box, one of the output shafts of the bidirectional motor is fixedly mounted with a discharging roller, and the discharging roller is provided with a plurality of first fixed material ports and second fixed material ports.
[0011] Preferably, a mounting groove is provided inside the discharge roller, a driving motor is fixedly installed inside the mounting groove, an extrusion roller is fixedly installed on the output shaft of the driving motor, an extrusion protrusion is fixedly installed on the extrusion roller, a blocking block is slidably installed inside the first feed port, a positioning rod is fixedly installed on the blocking block, one end of the positioning rod away from the blocking block extends to the inside of the mounting groove and a pressure block is fixedly installed, a limiting block is fixedly installed on the positioning rod, a limiting groove is fixedly installed inside the discharge roller and on the outside of the mounting groove, and a return spring is fixedly connected to the limit block.
[0012] Preferably, the number of the first and second feed ports is multiple and arranged in a ring, the pressure block is located between the two extrusion protrusions, the limit block is located inside the limit groove, the limit block is slidably connected to the limit groove, the return spring is located outside the positioning rod, and the end of the return spring away from the limit block is fixedly connected to the inside of the limit groove.
[0013] Preferably, the unloading assembly includes a rotating disk fixedly mounted on the other output shaft of the bidirectional motor, a T-shaped shaft fixedly mounted on the rotating disk, a driving rod rotatably mounted on the T-shaped shaft, a connecting rod fixedly mounted on the end of the driving rod away from the T-shaped shaft, a square frame rotatably mounted on the end of the connecting rod away from the driving rod, and a lifting plate fixedly mounted on the square frame.
[0014] Preferably, a Z-shaped toggle groove is provided on the side end surface of the lifting plate, a mounting shaft is rotatably installed inside the storage box, a swing box is fixedly installed on the mounting shaft, and a toggle rod is fixedly installed on the side end surface of the swing box.
[0015] Preferably, the side end surfaces of the material storage box are fixedly installed with symmetrically arranged stabilizing blocks, the inner side surfaces of the stabilizing blocks are provided with sliding grooves, the side end surfaces of the lifting plate are fixedly installed with sliding blocks, the material storage box is provided with a square groove, and the inner bottom of the swinging material box is provided with a material unloading groove.
[0016] Preferably, the toggle rod extends from one end of the swing material box to the inside of the toggle slot, the toggle rod is in sliding contact with the toggle slot, the sliding block is slidingly connected to the sliding slot, and the toggle rod in the swinging state is located inside the square slot.
[0017] Preferably, a gear block group is fixedly installed on the inner side surface of the square frame, a swing rod is fixedly installed inside the storage box and below the mounting axis, a swing blade is fixedly installed on the swing rod, and both ends of the swing rod extend to the outside of the storage box and are fixedly installed with a driven gear.
[0018] Preferably, the driven gear is located inside the square frame, and the gear block set is meshed with the driven gear.
[0019] The present invention provides a multifunctional seed supply device for a seeder. Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. The present invention drives the discharging roller to rotate through a bidirectional motor, and the seeds in the storage box will fall into the first fixed material port and the second fixed material port through the feeding port. Through the continuous rotation of the discharging roller in the rotating groove, the seeds in the first fixed material port and the second fixed material port will fall into the inside of the discharging pipe through the discharging port, and finally be discharged through the discharging pipe. When it is necessary to adjust the distance between the seeds and the soil, the extrusion protrusion on the extrusion roller is driven to rotate by the driving motor, and the extrusion protrusion is used to squeeze the pressure block, and the positioning rod on the pressure block drives the blocking block to close the first fixed material port. The seeds in the storage box cannot enter the inside of the first fixed material port, but can only enter the inside of the second fixed material port. The sowing spacing can be effectively adjusted by this method, thereby improving the sowing accuracy.
[0021] 2. In the present invention, when the bidirectional motor is working, it will synchronously drive the rotating disk to rotate, the T-shaped shaft on the rotating disk will drive the square frame on the connecting rod to move through the driving rod, and the lifting plate on the square frame will pass through the limit between the sliding block and the sliding groove to achieve vertical reciprocating motion, and the toggle groove on the lifting plate cooperates with the toggle rod on the swinging material box, so that the swinging material box swings around the mounting shaft, and the seeds in the swinging material box will evenly fall into the inside of the storage box, effectively avoiding the seeds in the storage box from being blocked at the position of the feed inlet, and effectively ensuring that the seeds can be evenly discharged;
[0022] 3. In the present invention, when the square frame is in the reciprocating lifting and lowering state, the gear block group in the square frame will cooperate with the driven gear, and when the driven gear is in the reciprocating rotation state, the swinging blade will be driven to swing back and forth in the storage box through the swinging rod. During the swinging process, the seeds in the storage box can be put in a loose state, so that they can pass through the feed port smoothly, avoiding blockage or uneven flow;
[0023] 4. The present invention effectively avoids the problems of seed blockage and uneven flow through the coordinated use of the discharge assembly and the feed assembly, and can accurately control the sowing spacing, thereby improving the efficiency and accuracy of sowing. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0025] Figure 2 The internal structure of the present invention is shown in FIG. Figure 1 ;
[0026] Figure 3 The internal structure of the present invention is shown in FIG. Figure 2 ;
[0027] Figure 4 It is a schematic diagram of the internal structure of the discharge roller in the present invention;
[0028] Figure 5 for Figure 4 The enlarged view of point A in the middle;
[0029] Figure 6 It is a structural schematic diagram of the blanking assembly in the present invention;
[0030] Figure 7 It is a structural schematic diagram of the swing rod in the present invention;
[0031] Figure 8 It is a structural schematic diagram of the lifting plate in the present invention.
[0032] In the figure: 1, seed feeding box; 2, storage box; 3, rotating groove; 4, discharge port; 5, discharge pipe; 6, feed port; 7, bidirectional motor; 8, discharge roller; 9, first fixed material port; 10, second fixed material port; 11, mounting groove; 12, drive motor; 13, squeeze roller; 14, squeeze convex block; 15, blocking block; 16, positioning rod; 17, pressure block; 18, limit block; 19, limit groove; 20, complex Position spring; 21. rotating disk; 22. T-axis; 23. driving rod; 24. connecting rod; 25. square frame; 26. lifting plate; 27. toggle slot; 28. mounting shaft; 29. swing material box; 30. toggle rod; 31. stabilizing block; 32. sliding slot; 33. sliding block; 34. square slot; 35. unloading slot; 36. gear block group; 37. swing rod; 38. swing blade; 39. driven gear. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] See also Figure 1-8The present invention is a multifunctional seeding machine seed supply device, comprising a seed supply box 1, a storage box 2 is fixedly installed on the upper end surface of the seed supply box 1, a rotating groove 3 is arranged inside the seed supply box 1, a discharge port 4 is arranged at the inner bottom of the rotating groove 3, a discharge pipe 5 is fixedly connected to the discharge port 4, a feed port 6 is arranged at the inner top of the rotating groove 3, the seed supply box 1 is fixedly connected to the storage box 2 through the feed port 6, wherein the feed port 6 and the discharge port 4 are in the same vertical direction, wherein the discharge pipe 5 is connected to the discharge port 4;
[0035] A discharging assembly is provided inside the rotating groove 3, and the uniform discharge of seeds and the adjustment of the distance between them can be achieved through the discharging assembly. The discharging assembly includes a bidirectional motor 7 fixedly installed inside the seed supply box 1, one of the output shafts of the bidirectional motor 7 is fixedly installed with a discharging roller 8, and a plurality of first fixed material ports 9 and second fixed material ports 10 are provided on the discharging roller 8, and a mounting groove 11 is provided inside the discharging roller 8, and a driving motor 12 is fixedly installed inside the mounting groove 11, and an extrusion roller 13 is fixedly installed on the output shaft of the driving motor 12, and an extrusion protrusion 14 is fixedly installed on the extrusion roller 13, and a blocking block 15 is slidably installed inside the first fixed material port 9, and a positioning rod 16 is fixedly installed on the blocking block 15, and the end of the positioning rod 16 away from the blocking block 15 extends to the inside of the mounting groove 11, and a pressure block 17 is fixedly installed, and a limiting block 18 is fixedly installed on the positioning rod 16, and the discharging roller 8 and on the outside of the mounting groove 11, a limiting groove 19 is fixedly installed, and a return spring 20 is fixedly connected to the limiting block 18. The number of the first fixed material port 9 and the second fixed material port 10 is multiple and arranged in a ring. The pressure block 17 is between the two extrusion protrusions 14, and the position of the limiting block 18 is inside the limiting groove 19. The limiting block 18 is slidably connected to the limiting groove 19, and the position of the return spring 20 is on the outside of the positioning rod 16. One end of the return spring 20 away from the limiting block 18 is fixedly connected to the inside of the limiting groove 19, wherein the rotating roller rotates in fit with the rotating groove 3 to prevent the seeds in the storage box 2 from entering the inside of the rotating groove 3, thereby affecting the uniform feeding of the seeds, wherein when the extrusion protrusion 14 returns to its original position, the blocking block 15 will be restored to its original position through the elasticity of the return spring 20, and the first fixed material port 9 in the blocked state can be used normally.
[0036] In this embodiment, the discharge roller 8 is driven to rotate by the bidirectional motor 7, and the seeds in the storage box 2 will fall into the first fixed material port 9 and the second fixed material port 10 through the feed port 6. Through the continuous rotation of the discharge roller 8 in the rotating groove 3, the seeds in the first fixed material port 9 and the second fixed material port 10 will fall into the discharge pipe 5 through the discharge port 4, and finally be discharged through the discharge pipe 5. When it is necessary to adjust the distance between the seeds and the soil, the extrusion protrusion 14 on the extrusion roller 13 is driven to rotate by the driving motor 12. The extrusion protrusion 14 squeezes the pressure block 17, and the positioning rod 16 on the pressure block 17 drives the blocking block 15 to close the first fixed material port 9. The seeds in the storage box 2 cannot enter the first fixed material port 9, but can only enter the second fixed material port 10. This method can effectively adjust the sowing spacing, thereby improving the sowing accuracy.
[0037] The storage box 2 is provided with a feeding assembly, through which the seeds in the storage box 2 are uniformly dropped into the discharge assembly, and the feeding assembly includes a rotating disk 21 fixedly mounted on the other output shaft of the bidirectional motor 7, a T-shaped shaft 22 fixedly mounted on the rotating disk 21, a driving rod 23 rotatably mounted on the T-shaped shaft 22, a connecting rod 24 fixedly mounted on the end of the driving rod 23 away from the T-shaped shaft 22, a square frame 25 rotatably mounted on the end of the connecting rod 24 away from the driving rod 23, a lifting plate 26 fixedly mounted on the square frame 25, a Z-shaped toggle groove 27 is provided on the side end surface of the lifting plate 26, a mounting shaft 28 is rotatably mounted inside the storage box 2, a swinging box 29 is fixedly mounted on the mounting shaft 28, and a side end of the swinging box 29 A toggle rod 30 is fixedly installed on the surface, and a symmetrically arranged stabilizing block 31 is fixedly installed on the side end surface of the storage box 2. A sliding groove 32 is provided on the inner side surface of the stabilizing block 31, and a sliding block 33 is fixedly installed on the side end surface of the lifting plate 26. A square groove 34 is provided on the storage box 2, and a material unloading groove 35 is provided on the inner bottom of the swinging material box 29. The toggle rod 30 extends to the inside of the toggle groove 27 at one end away from the swinging material box 29, and the toggle rod 30 is in sliding contact with the toggle groove 27, and the sliding block 33 is slidably connected with the sliding groove 32. The toggle rod 30 in the swinging state is located inside the square groove 34, wherein the notch of the square groove 34 is larger than the diameter of the toggle rod 30. Through the setting of the T-shaped shaft 22, it is ensured that the driving rod 23 will not fall off the T-shaped shaft 22.
[0038] In this embodiment, when the bidirectional motor 7 is working, it will synchronously drive the rotating disk 21 to rotate. The T-shaped shaft 22 on the rotating disk 21 will drive the square frame 25 on the connecting rod 24 to move through the driving rod 23. The lifting plate 26 on the square frame 25 will pass through the limit between the sliding block 33 and the sliding groove 32 to achieve reciprocating motion in the vertical direction. The toggle groove 27 on the lifting plate 26 and the toggle rod 30 on the swinging material box 29 are used to cooperate with each other, so that the swinging material box 29 swings around the mounting shaft 28 as the center. The seeds in the swinging material box 29 will fall evenly into the interior of the storage box 2, effectively avoiding the seeds in the storage box 2 from being blocked at the position of the feed port 6, and effectively ensuring that the seeds can be discharged evenly.
[0039] A gear block group 36 is fixedly installed on the inner side surface of the square frame 25, and a swing rod 37 is fixedly installed inside the storage box 2 and below the mounting shaft 28. A swing blade 38 is fixedly installed on the swing rod 37. Both ends of the swing rod 37 extend to the outside of the storage box 2 and are fixedly installed with a driven gear 39. The driven gear 39 is located inside the square frame 25, and the gear block group 36 is meshed with the driven gear 39.
[0040] In this embodiment, when the square frame 25 is in a reciprocating lifting state, the tooth block group 36 in the square frame 25 will cooperate with the driven gear 39. When the driven gear 39 is in a reciprocating rotation, the swing blade 38 will be driven to swing back and forth in the storage box 2 through the swing rod 37. During the swinging process, the seeds in the storage box 2 can be put in a loose state, allowing them to pass through the feed port 6 smoothly, avoiding blockage or uneven flow.
[0041] Working principle:
[0042] When in use, the discharging roller 8 is driven to rotate by the bidirectional motor 7, and the seeds in the storage box 2 will fall into the first fixed material port 9 and the second fixed material port 10 through the feed port 6. Through the continuous rotation of the discharging roller 8 in the rotating groove 3, the seeds in the first fixed material port 9 and the second fixed material port 10 will fall into the inside of the discharging passage 5 through the discharging port 4, and finally be discharged through the discharging passage 5;
[0043] When the distance between the seeds and the soil needs to be adjusted, the extrusion protrusion 14 on the extrusion roller 13 is driven to rotate by the driving motor 12, and the extrusion protrusion 14 is used to squeeze the pressure block 17, and the positioning rod 16 on the pressure block 17 will drive the blocking block 15 to close the first fixed material opening 9. The seeds in the storage box 2 cannot enter the first fixed material opening 9, but can only enter the second fixed material opening 10. This method can effectively adjust the sowing spacing, thereby improving the sowing accuracy.
[0044] When the bidirectional motor 7 is working, it will synchronously drive the rotating disk 21 to rotate, and the T-shaped shaft 22 on the rotating disk 21 will drive the square frame 25 on the connecting rod 24 to move through the driving rod 23, and the lifting plate 26 on the square frame 25 will pass through the limit between the sliding block 33 and the sliding groove 32, so as to realize the reciprocating motion in the vertical direction, and the toggle groove 27 on the lifting plate 26 cooperates with the toggle rod 30 on the swinging material box 29, so that the swinging material box 29 swings around the mounting shaft 28 as the center, and the seeds in the swinging material box 29 will evenly fall into the inside of the storage box 2, effectively avoiding the seeds in the storage box 2 from being blocked at the position of the feed port 6, and effectively ensuring that the seeds can be evenly discharged;
[0045] When the square frame 25 is in the reciprocating lifting and lowering state, the tooth block group 36 in the square frame 25 will cooperate with the driven gear 39. When the driven gear 39 is in the reciprocating rotation, the swing blade 38 will be driven to swing back and forth in the storage box 2 through the swing rod 37. During the swinging process, the seeds in the storage box 2 can be put in a loose state, allowing them to pass through the feed port 6 smoothly, avoiding blockage or uneven flow.
[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0047] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims
1. A multifunctional seeding machine seed supply device, comprising a seed supply box (1), characterized in that: A storage box (2) is fixedly mounted on the upper end surface of the seed supply box (1), a rotating groove (3) is provided inside the seed supply box (1), a discharge port (4) is provided at the inner bottom of the rotating groove (3), a discharge pipe (5) is fixedly connected to the discharge port (4), a feed port (6) is provided at the inner top of the rotating groove (3), and the seed supply box (1) is fixedly connected to the storage box (2) via the feed port (6); A discharge assembly is arranged inside the rotating groove (3), and the uniform discharge of seeds and the adjustment of the distance between them can be achieved through the discharge assembly. The discharge assembly comprises a bidirectional motor (7) fixedly mounted inside the seed supply box (1), and a discharge roller (8) is fixedly mounted on one of the output shafts of the bidirectional motor (7), and a plurality of first fixed material openings (9) and second fixed material openings (10) are provided on the discharge roller (8); The storage box (2) is provided with a feeding assembly, through which the seeds in the storage box (2) are uniformly dropped into the discharge assembly, the feeding assembly comprising a rotating disk (21) fixedly mounted on the other output shaft of the bidirectional motor (7), the rotating disk (21) being fixedly mounted with a T-shaped shaft (22), the T-shaped shaft (22) being rotatably mounted with a driving rod (23), the driving rod (23) being fixedly mounted with a connecting rod (24) at one end away from the T-shaped shaft (22), the connecting rod (24) being rotatably mounted with a square frame (25) at one end away from the driving rod (23), the square frame (25) being fixedly mounted with a lifting plate (26), the side end surface of the lifting plate (26) being provided with a Z-shaped toggle groove (27), the interior of the storage box (2) being rotatably mounted with a mounting shaft (28), the mounting shaft (2 8) is fixedly mounted with a swing material box (29), a toggle rod (30) is fixedly mounted on the side end surface of the swing material box (29), a symmetrically arranged stabilizing block (31) is fixedly mounted on the side end surface of the storage box (2), a sliding groove (32) is provided on the inner side surface of the stabilizing block (31), a sliding block (33) is fixedly mounted on the side end surface of the lifting plate (26), a square groove (34) is provided on the storage box (2), a material discharge groove (35) is provided on the inner bottom of the swing material box (29), one end of the toggle rod (30) away from the swing material box (29) extends to the inside of the toggle groove (27), the toggle rod (30) is in sliding contact with the toggle groove (27), the sliding block (33) is slidably connected with the sliding groove (32), and the toggle rod (30) in the swinging state is located inside the square groove (34); A tooth block group (36) is fixedly mounted on the inner side surface of the square frame (25); a swing rod (37) is fixedly mounted inside the material storage box (2) and below the mounting shaft (28); a swing blade (38) is fixedly mounted on the swing rod (37); both ends of the swing rod (37) extend to the outside of the material storage box (2) and a driven gear (39) is fixedly mounted thereon; the driven gear (39) is located inside the square frame (25), and the tooth block group (36) meshes with the driven gear (39).
2. A multifunctional seeding machine seed supply device according to claim 1, characterized in that: The discharging roller (8) is provided with a mounting groove (11) inside, a driving motor (12) is fixedly mounted inside the mounting groove (11), an extrusion roller (13) is fixedly mounted on the output shaft of the driving motor (12), an extrusion protrusion (14) is fixedly mounted on the extrusion roller (13), a blocking block (15) is slidably mounted inside the first fixed material port (9), a positioning rod (16) is fixedly mounted on the blocking block (15), one end of the positioning rod (16) away from the blocking block (15) extends to the inside of the mounting groove (11) and is fixedly mounted with a pressure block (17), a limiting block (18) is fixedly mounted on the positioning rod (16), a limiting groove (19) is fixedly mounted inside the discharging roller (8) and outside the mounting groove (11), and a return spring (20) is fixedly connected to the limiting block (18).
3. A multifunctional seeding machine seed supply device according to claim 2, characterized in that: The number of the first material fixing opening (9) and the second material fixing opening (10) is multiple and they are arranged in a ring shape. The pressure block (17) is located between the two extrusion protrusions (14). The position of the limit block (18) is located inside the limit groove (19). The limit block (18) is slidably connected to the limit groove (19). The position of the return spring (20) is located outside the positioning rod (16). One end of the return spring (20) away from the limit block (18) is fixedly connected to the inside of the limit groove (19).
Citation Information
Patent Citations
Automatic quantitative seed supplying device for precision seeder
CN203735044U
Automatic quantitative seed supply device for precision seeder
CN103988612A