A double seed furrow planter

Abstract

The application relates to the technical field of seeders, in particular to a double-seed-belt seeder, which comprises a frame, a fertilizer trenching device, a fertilizer box, a fertilizer discharging mechanism, a seed box, a seed trenching disc and a seed discharger, a land wheel is installed at the front side end of the frame, a roller is installed at the rear side end of the frame, the fertilizer trenching device is installed on the frame and is used for trenching a fertilizer trench on soil, the fertilizer box is fixedly installed on the frame and stores fertilizers, the fertilizer discharging mechanism is installed at the lower side end of the fertilizer box and is used for feeding the fertilizers in the fertilizer box into the fertilizer trench; the double-seed-belt seeder is composed of the frame, the fertilizer trenching device, the fertilizer box, the fertilizer discharging mechanism, the seed box, the seed trenching disc and the seed discharger, the fertilizer trenching device is used for trenching, the fertilizer discharging mechanism is used for fertilizing, the seed trenching disc is used for synchronously seeding, and the seed discharger is used for seeding, so that fertilizing and seeding are simultaneously performed, and the overall working efficiency of the seeder is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of seeders, specifically to a double-seedling belt seeder. Background Technology

[0002] A seeder is a planting machine that uses crop seeds as the object of sowing; it is used for sowing certain types or varieties of crops. A Chinese patent document with publication number CN105612881B discloses a seeder, the scheme of which includes a rotary assembly. The rotary assembly includes a rotary cavity, a non-closed cavity structure formed by a baffle plate and side baffles located on both sides of the baffle plate, for accommodating a rotary component; the rotary component, disposed in the rotary cavity, uses its own rotation to push seeds entering the rotary cavity through the seed inlet from the seed outlet, including a rotating body and a number of paddles evenly arranged on the circumference of the rotating body; the seed inlet, formed by the left and right side baffles, is located at the starting point of the rotary cavity; the seed outlet, formed by the left and right side baffles, is located at the ending point of the rotary cavity; the starting point of the rotary rotation is located at a non-highest point in the rotary cavity, and has a resistance torque when rotating the seeds; the ending point of the rotary rotation, according to an unrestricted free rotation method, is set at the point when the seeds begin to fall. However, the sowing equipment in the above scheme cannot fertilize simultaneously, which leads to the need for additional fertilization later, thus affecting the overall sowing efficiency. Furthermore, it can only place one seed at a single sowing point, which means that if the seed fails to germinate, replanting will be necessary later, resulting in asynchronous seedling development cycles and affecting the subsequent cultivation process. Therefore, this invention proposes a double-seedling sowing machine to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a double-seedling seeder to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a double-seedling seeder, comprising: The frame has a ground wheel installed at the front end and a press wheel installed at the rear end. A fertilizer trencher, which is mounted on a frame and is used to create fertilizer trenches in the soil. Fertilizer box, which is fixedly installed on the frame and contains fertilizer; A fertilizer discharge mechanism is installed at the lower end of the fertilizer tank and is used to deliver the fertilizer in the fertilizer tank to the fertilizer ditch. Seed box, which is fixedly installed on the frame and contains seeds; A seed trenching disc, which is mounted on a frame and is used to create seed trenches in the soil; A seed metering device is fixedly installed on the lower side of the seed box and is used to transport the seeds in the seed box to the seed furrow.

[0005] Preferably, the fertilizer furrows opened by the fertilizer furrow opener and the seed furrows opened by the seed furrow opener are staggered. The pressing wheel is used to fill the fertilizer furrows after fertilization and the seed furrows after sowing, and to compact the soil at the location of the fertilizer furrows and seed furrows. A filter screen is provided in the material cavity of the fertilizer box. The filter screen has a pore size larger than the particle size of the fertilizer. A box cover is installed at the opening of the fertilizer box.

[0006] Preferably, three fertilizer discharge mechanisms are evenly spaced, and each fertilizer discharge mechanism includes a fertilizer bin and a feeding wheel. The fertilizer bin is fixedly installed on the fertilizer box, and the inlet of the fertilizer bin is aligned with the outlet of the fertilizer box. A discharge port is provided at the lower end of the fertilizer bin, and adjacent fertilizer bins are reinforced and connected by reinforcing rods. The feeding wheel is located in the inner cavity of the fertilizer bin, and a rotating shaft is rotatably installed on the fertilizer bin. The rotating shaft is driven by a servo motor on the frame. The feeding wheel is fixedly installed on the rotating shaft, and a feeding groove is provided on the side wall of the feeding wheel. The feeding groove is arranged in a circle around the circumference of the feeding wheel. The fertilizer entering through the inlet enters into the feeding groove, and under the rotation of the feeding wheel, the fertilizer in the feeding groove is delivered to the discharge port.

[0007] Preferably, a connecting rod groove and a baffle plate groove are fixedly installed on the side wall of the fertilizer bin. The connecting rod groove is a rectangular groove, and a connecting rod is movably arranged in the connecting rod groove. A baffle plate is fixedly installed on the connecting rod, and the baffle plate is movably arranged in the baffle plate groove. When the baffle plate moves with the connecting rod, the area of ​​the baffle plate covering the feeding trough changes.

[0008] Preferably, an installation tube is fixedly installed on the fertilizer tank. A positioning groove is formed on the inner wall of the installation tube. Multiple sets of positioning grooves are evenly spaced. One end of the connecting rod is fixedly installed with an installation shaft, which is fixedly installed on the installation tube. The installation shaft has a central hole, and a positioning slot is formed on the side wall of the central hole. A set of positioning slots is symmetrically arranged, and the cross-section of the positioning slot is convex. A positioning component is movably installed in the positioning slot. The positioning component has a convex cross-section, and a positioning protrusion is integrally formed on the outer surface of the positioning component. The positioning protrusion matches the positioning slot. A central shaft is inserted into the central hole. During actual installation, the inner wall of the positioning component abuts against the side wall of the central shaft, and at this time, the positioning protrusion is embedded in the positioning slot. A scale is fixedly installed on the fertilizer tank, and a scale pointer is fixedly installed on the connecting rod. The scale pointer corresponds to the scale.

[0009] Preferably, the inner wall of the central hole is provided with a first groove, an annular groove and a second groove. The first groove and the second groove are both connected to the annular groove. A set of the first groove and the second groove are symmetrically arranged. The side wall of the central shaft is integrally formed with a locking protrusion. The cross-sectional dimensions of the locking protrusion, the first groove and the second groove are matched. A support spring is fixedly connected to the inner end of the central shaft. When the locking protrusion is inserted into the annular groove along the first groove and enters the second groove, the support spring is in a compressed state.

[0010] Preferably, a rotating handle is fixedly connected to the outer end of the central shaft. When the engaging protrusion is embedded in the second slot, the rotating handle is aligned with the first slot. A magnet is embedded in the positioning member, and the mounting shaft is cast from ferromagnetic material.

[0011] Preferably, the center hole of the feeding wheel is provided with an alignment groove on the side wall, and the side wall of the rotating shaft is provided with a spring clip clearance groove. A positioning spring clip is integrally formed on the side wall of the clearance groove. When the feeding wheel is fixedly installed on the rotating shaft, the positioning spring clip is embedded in the alignment groove, and the length of the feeding wheel matches the width of the inner cavity of the fertilizer bin.

[0012] Preferably, the seed metering device includes a seed metering device body, a seed metering device cover plate, and a seeding tray. The seed metering device body is fixed to the lower end of the seed box, and the seed hopper port of the seed metering device body is aligned with the seed drop port on the seed box. One seed metering device cover plate is fixedly installed on each side of the seed metering device body. A rotating shaft is rotatably installed on the seed metering device body, and the rotating shaft is driven by a drive structure. A set of seeding trays is symmetrically arranged, and the seeding trays are fixed on the rotating shafts. Feeding holes are evenly opened on the seeding trays.

[0013] Preferably, a baffle is fixedly connected to the inner wall of the seed metering device cover, and a gap is left between the baffle and the seeding tray. The gap between the baffle and the seeding tray is smaller than the particle size of the seeds. An adsorption cavity is formed on the seed metering device cover. The adsorption cavity is connected to an air extraction device through an air extraction pipe. When the air extraction device is running, the seeds in the seed bin are adsorbed into the feeding hole on the seeding tray. When the feeding hole on the seeding tray rotates to separate from the baffle, the seeds in the feeding hole fall from the seed metering device body and into the seed groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a double-seedling belt seeder consisting of a frame, a fertilizer furrow opener, a fertilizer box, a fertilizer discharging mechanism, a seed box, a seed furrow opening tray, and a seed metering device, the fertilizer furrow opener opens furrows, the fertilizer discharging mechanism applies fertilizer, and the seed furrow opener and seed metering device simultaneously sow the seeds, thereby achieving simultaneous fertilization and sowing, and effectively improving the overall working efficiency of the seeder. 2. By setting the fertilizer discharging mechanism to consist of a fertilizer bin and a feeding wheel, and opening a connecting rod groove and a baffle plate groove on the side wall of the fertilizer bin, and setting a connecting rod and a baffle plate in the connecting rod groove and the baffle plate groove respectively, the position of the baffle plate can be adjusted by the connecting rod, and the covering area of ​​the feeding trough can be adjusted by the baffle plate, thereby effectively controlling the amount of fertilizer applied to ensure the survival rate of seeds. 3. By enabling the seed metering device to simultaneously meter the next pair of seeds, the trouble of having to replant a single seed that has not germinated can be effectively avoided. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a rear view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a side view of the present invention; Figure 5 This is a bottom view of the fertilizer box of the present invention; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 for Figure 5 Enlarged schematic diagram of the structure at point B; Figure 8 This is a schematic diagram showing the installation position of the filter screen of the present invention; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point C; Figure 10 This is a top view of the fertilizer box of the present invention; Figure 11 for Figure 10 Enlarged schematic diagram of the structure at point D; Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point E in the middle; Figure 13 This is a schematic diagram of the inner structure of the positioning component of the present invention; Figure 14 This is a schematic diagram of the outer structure of the positioning component of the present invention; Figure 15 This is a schematic diagram of the feeding wheel structure of the present invention; Figure 16 This is a schematic diagram of the central shaft structure of the present invention; Figure 17 This is a schematic diagram showing the connection between the fertilizer bin and the rotating shaft in this invention; Figure 18 for Figure 17 Enlarged schematic diagram of the structure at point F; Figure 19 This is a schematic diagram of the connection between the baffle plate and the connecting rod of the present invention; Figure 20 for Figure 19 Enlarged schematic diagram of the structure at point G in the middle; Figure 21 This is a schematic diagram of the connecting rod structure of the present invention; Figure 22 for Figure 21 Enlarged schematic diagram of the structure at point H; Figure 23 for Figure 22 Enlarged schematic diagram of the structure at point J; Figure 24 This is a schematic diagram of the rotating shaft structure of the present invention; Figure 25 for Figure 24 Enlarged schematic diagram of the structure at point K; Figure 26 This is a schematic diagram of the seed metering device of the present invention; Figure 27 This is a half-sectional view of the seed metering device of the present invention; Figure 28 This is a bottom view of the seed metering device of the present invention; Figure 29 for Figure 28 Enlarged schematic diagram of the structure at point L; Figure 30 for Figure 29 Enlarged schematic diagram of the structure at point M.

[0016] In the diagram: 1. Frame; 2. Fertilizer furrow opener; 3. Fertilizer box; 4. Fertilizer discharge mechanism; 5. Seed box; 6. Seed furrow opener tray; 7. Seed metering device; 8. Ground wheel; 9. Press wheel; 10. Box cover; 11. Filter screen; 12. Fertilizer bin; 13. Feed inlet; 14. Discharge outlet; 15. Reinforcing rod; 16. Rotating shaft; 17. Feeding wheel; 18. Feeding trough; 19. Connecting rod groove; 20. Baffle plate groove; 21. Connecting rod; 22. Baffle plate; 23. Mounting pipe; 24. Mounting shaft; 25. Center hole; 26. Positioning component groove. Positioning component 27, positioning protrusion 28, positioning groove 29, central shaft 30, first groove 31, annular groove 32, second groove 33, engaging protrusion 34, support spring 35, handle 36, scale 37, scale pointer 38, alignment groove 39, spring clip clearance groove 40, positioning spring clip 41, seed metering device body 42, seed metering device cover plate 43, seeding tray 44, feeding hole 45, baffle 46, rotating shaft 47, seed bin 48, magnet block 50. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-30 The present invention provides the following three preferred embodiments: Example 1: A double-seedling seeder includes a frame 1, a fertilizer furrow opener 2, a fertilizer tank 3, a fertilizer discharging mechanism 4, a seed tank 5, a seed furrowing tray 6, and a seed metering device 7. A ground wheel 8 is installed on the front end of the frame 1, and a press wheel 9 is installed on the rear end of the frame 1. The fertilizer furrow opener 2 is mounted on the frame 1 and is used to create fertilizer furrows in the soil. The fertilizer tank 3 is fixedly mounted on the frame 1 and stores fertilizer. The fertilizer discharging mechanism 4 is installed on the lower end of the fertilizer tank 3 and is used to deliver the fertilizer from the fertilizer tank 3 into the fertilizer furrows. The seed tank 5 is fixedly mounted on the frame 1 and stores seeds. The seed furrowing tray 6 is installed on the frame 1 and is used to open seed furrows in the soil. The seed metering device 7 is fixedly installed on the lower side of the seed box 5 and is used to transport the seeds in the seed box 5 to the seed furrows. By setting up a double seedling belt seeder composed of the frame 1, fertilizer furrowing device 2, fertilizer box 3, fertilizer dispensing mechanism 4, seed box 5, seed furrowing tray 6 and seed metering device 7, the fertilizer furrowing device 2 opens the furrows, the fertilizer dispensing mechanism 4 applies fertilizer, and the seed furrowing device 6 and seed metering device 7 simultaneously sow the seeds, thereby realizing the simultaneous operation of fertilization and sowing, and effectively improving the overall working efficiency of the seeder.

[0019] The fertilizer furrow opened by the fertilizer furrow opener 2 and the seed furrow opened by the seed furrow opener 6 are staggered. The press roller 9 is used to fill the fertilizer furrow after fertilization and the seed furrow after sowing, and to compact the soil at the location of the fertilizer furrow and the seed furrow. The fertilizer box 3 is equipped with a filter screen 11 in the material cavity. The filter screen 11 has a filter hole larger than the particle size of the fertilizer. The box opening of the fertilizer box 3 is equipped with a box cover 10. The filter screen 11 can prevent the clumps of fertilizer from entering the fertilizer box 3 and affecting the normal operation of the seeder.

[0020] Example 2: Based on Example 1, three fertilizer discharge mechanisms 4 are arranged at equal intervals. Each fertilizer discharge mechanism 4 includes a fertilizer bin 12 and a feeding wheel 17. The fertilizer bin 12 is fixedly installed on the fertilizer box 3, and the feed inlet 13 of the fertilizer bin 12 is aligned with the discharge outlet of the fertilizer box 3. A discharge outlet 14 is provided at the lower end of the fertilizer bin 12, and adjacent fertilizer bins 12 are reinforced and connected by reinforcing rods 15. The feeding wheel 17 is located in the inner cavity of the fertilizer bin 12, and a rotating shaft 16 is rotatably installed on the fertilizer bin 12. The rotating shaft 16 is driven by a servo motor on the frame 1. The feeding wheel 17 is fixedly installed on the rotating shaft 16. A feeding groove 18 is provided on the side wall of the feeding wheel 17. The feeding groove 18 is arranged in a circle around the feeding wheel 17. The fertilizer entering through the feed inlet 13 enters into the feeding groove 18, and under the rotation of the feeding wheel 17, the fertilizer in the feeding groove 18 is sent to the position of the discharge outlet 14.

[0021] A connecting rod groove 19 and a baffle plate groove 20 are fixedly installed on the side wall of the fertilizer bin 12. The connecting rod groove 19 is a rectangular groove, and a connecting rod 21 is movably arranged in the connecting rod groove 19. A baffle plate 22 is fixedly installed on the connecting rod 21 and is movably arranged in the baffle plate groove 20. When the baffle plate 22 moves with the connecting rod 21, the covering area of ​​the baffle plate 22 on the feeding trough 18 changes. By setting the fertilizer discharge mechanism 4 to be composed of the fertilizer bin 12 and the feeding wheel 17, and opening the connecting rod groove 19 and the baffle plate groove 20 on the side wall of the fertilizer bin 12, and setting the connecting rod 21 and the baffle plate 22 in the connecting rod groove 19 and the baffle plate groove 20 respectively, the position of the baffle plate 22 can be adjusted by the connecting rod 21, thereby adjusting the covering area of ​​the feeding trough 18 by the baffle plate 22, thus effectively controlling the amount of fertilizer applied to ensure the survival rate of seeds.

[0022] An installation tube 23 is fixedly installed on the fertilizer box 3. Positioning grooves 29 are formed on the inner wall of the installation tube 23. Multiple sets of positioning grooves 29 are evenly spaced. One end of the connecting rod 21 is fixedly installed by an installation shaft 24, which is fixedly installed on the installation tube 23. A central hole 25 is formed on the installation shaft 24. A positioning groove 26 is formed on the side wall of the central hole 25. A set of positioning grooves 26 is symmetrically arranged, and the cross-section of the positioning groove 26 is convex. A positioning element 27 is movably installed in the positioning groove 26. The positioning element 27 has a convex cross-section, and a positioning protrusion 28 is integrally formed on the outer surface of the positioning element 27, which matches the positioning groove 29. The device is equipped with a central shaft 30 inserted into the central hole 25. During actual installation, the inner wall of the positioning part 27 abuts against the side wall of the central shaft 30. At this time, the positioning protrusion 28 is embedded in the positioning groove 29, which facilitates the positioning of the connecting rod 21 and ensures the convenience of positioning the connecting rod 21. A scale 37 is fixedly installed on the fat box 3, and a scale pointer 38 is fixedly installed on the connecting rod 21. The scale pointer 38 is set correspondingly to the scale 37. The scale 37 and the scale pointer 38 can facilitate the staff to determine the position of the baffle plate 22.

[0023] The inner wall of the central hole 25 is provided with a first groove 31, an annular groove 32 and a second groove 33. The first groove 31 and the second groove 33 are connected to the annular groove 32. A set of the first groove 31 and the second groove 33 are symmetrically arranged. The side wall of the central shaft 30 is integrally formed with a locking protrusion 34. The cross-sectional dimensions of the locking protrusion 34, the first groove 31 and the second groove 33 are matched. A support spring 35 is fixedly connected to the inner end of the central shaft 30. When the locking protrusion 34 is inserted into the annular groove 32 along the first groove 31 and enters the second groove 33, the support spring 35 is in a compressed state. The locking protrusion 34 is embedded in the second groove 33, which facilitates the positioning of the central shaft 30 and prevents the central shaft 30 from falling off, thereby effectively ensuring the positioning stability of the connecting rod 21.

[0024] A rotating handle 36 is fixedly connected to the outer end of the central shaft 30. When the engaging protrusion 34 is embedded in the second slot 33, the rotating handle 36 is aligned with the first slot 31. A magnet 50 is embedded in the positioning member 27. The mounting shaft 24 is cast from ferromagnetic material. The magnet 50 can ensure that the positioning member 27 is connected in the positioning member slot 26.

[0025] Example 3: Based on Example 2, an alignment groove 39 is provided on the side wall of the center hole of the feeding wheel 17, and a spring clip clearance groove 40 is provided on the side wall of the rotating shaft 16. A positioning spring clip 41 is integrally formed on the side wall of the clearance groove 40. When the feeding wheel 17 is fixedly installed on the rotating shaft 16, the positioning spring clip 41 is embedded in the alignment groove 39. The length of the feeding wheel 17 matches the width of the inner cavity of the fat bin 12, which facilitates the positioning of the feeding wheel 17 on the rotating shaft 16.

[0026] The seed metering device 7 includes a seed metering device body 42, a seed metering device cover plate 43, and a seeding tray 44. The seed metering device body 42 is fixed to the lower end of the seed box 5, and the seed chamber 48 port of the seed metering device body 42 is aligned with the seed drop port on the seed box 5. One seed metering device cover plate 43 is fixedly installed on each side of the seed metering device body 42. A rotating shaft 47 is rotatably installed on the seed metering device body 42. The rotating shaft 47 is driven by a drive structure. A set of seeding trays 44 are symmetrically arranged and fixed on the rotating shaft 47. Feeding holes 45 are evenly opened on the seeding trays 44.

[0027] A baffle 46 is fixedly connected to the inner wall of the seed metering cover 43. A gap is left between the baffle 46 and the seeding tray 44, and the gap between the baffle 46 and the seeding tray 44 is smaller than the particle size of the seeds. An adsorption cavity is formed on the seed metering cover 43. The adsorption cavity is connected to an air extraction device through an air extraction pipe. When the air extraction device is running, the seeds in the seed bin 48 are adsorbed into the feeding hole 45 on the seeding tray 44. When the feeding hole 45 on the seeding tray 44 rotates to separate from the baffle 46, the seeds in the feeding hole 45 fall from the seed metering body 42 and into the seed groove, so that a pair of seeds can fall into the seed groove at the same time, thereby effectively avoiding the trouble of replanting due to a single seed not germinating.

[0028] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A double-seedling seeder, characterized in that: include: A frame (1) is provided with a ground wheel (8) at the front end and a press wheel (9) at the rear end. Fertilizer trencher (2), which is mounted on the frame (1) and is used to open fertilizer trenches in the soil; Fertilizer box (3), the fertilizer box (3) is fixedly installed on the frame (1), and fertilizer is stored in the fertilizer box (3); Fertilizer discharge mechanism (4) is installed on the lower end of fertilizer box (3) and is used to deliver fertilizer in fertilizer box (3) to fertilizer ditch; Seed box (5), which is fixedly installed on the frame (1) and contains seeds; A seed trenching disc (6) is mounted on a frame (1) and is used to create seed trenches in the soil. Seed metering device (7), which is fixedly installed on the lower side of seed box (5) and is used to transport the seeds in seed box (5) to seed furrow; The fertilizer discharge mechanism (4) is provided in three equally spaced positions. The fertilizer discharge mechanism (4) includes a fertilizer bin (12) and a feeding wheel (17). A rotating shaft (16) is rotatably installed on the fertilizer bin (12). A connecting rod groove (19) and a baffle plate groove (20) are fixedly installed on the side wall of the fertilizer bin (12). The connecting rod groove (19) is a rectangular groove. A connecting rod (21) is movably arranged in the connecting rod groove (19). A baffle plate (22) is fixedly installed on the connecting rod (21). The baffle plate (22) is movably arranged in the baffle plate groove (20). When the baffle plate (22) moves with the connecting rod (21), the area of ​​the baffle plate (22) covering the feeding trough (18) changes. An installation tube (23) is fixedly installed on the box (3). A positioning groove (29) is provided on the inner side wall of the installation tube (23). Multiple sets of positioning grooves (29) are provided at equal intervals. One end of the connecting rod (21) is fixedly installed by an installation shaft (24). The installation shaft (24) is fixedly installed on the installation tube (23). A center hole (25) is provided on the installation shaft (24). A positioning groove (26) is provided on the side wall of the center hole (25). A set of positioning grooves (26) is symmetrically arranged. The cross section of the positioning groove (26) is convex. A positioning element (27) is movably installed in the positioning groove (26). The cross section of the positioning element (27) is convex. The outer side of the component (27) is integrally formed with a positioning protrusion (28), which is matched with the positioning groove (29). A central shaft (30) is inserted into the central hole (25). When the central shaft (30) is actually installed, the inner wall of the positioning component (27) abuts against the side wall of the central shaft (30), and at this time, the positioning protrusion (28) is embedded in the positioning groove (29). A scale (37) is fixedly installed on the fat box (3), and a scale pointer (38) is fixedly installed on the connecting rod (21). The scale pointer (38) is correspondingly set with the scale (37). A first groove (31) is opened on the inner wall of the central hole (25). The annular groove (32) and the second groove (33) are connected to the annular groove (32). The first groove (31) and the second groove (33) are symmetrically arranged in a set. The side wall of the central shaft (30) is integrally formed with a locking protrusion (34). The cross-sectional dimensions of the locking protrusion (34), the first groove (31) and the second groove (33) are matched. The inner end of the central shaft (30) is fixedly connected with a support spring (35). When the locking protrusion (34) is inserted into the annular groove (32) along the first groove (31) and enters the second groove (33), the support spring (35) is in a compressed state.A rotating handle (36) is fixedly connected to the outer end of the central shaft (30). When the engaging protrusion (34) is inserted into the second slot (33), the rotating handle (36) is aligned with the first slot (31). A magnet (50) is embedded in the positioning member (27). The mounting shaft (24) is cast from ferromagnetic material.

2. The double-seedling seeder according to claim 1, characterized in that: The fertilizer furrow opened by the fertilizer furrow opener (2) and the seed furrow opened by the seed furrow opener (6) are staggered. The pressing wheel (9) is used to fill the fertilizer furrow after fertilization and the seed furrow after sowing, and to press the soil at the location of the fertilizer furrow and the seed furrow. A filter screen (11) is provided in the material cavity of the fertilizer box (3). The filter holes of the filter screen (11) are larger than the particle size of the fertilizer. A box cover (10) is installed at the box opening of the fertilizer box (3).

3. A double-seedling seeder according to claim 1, characterized in that: The fertilizer bin (12) is fixedly installed on the fertilizer box (3), and the feed inlet (13) of the fertilizer bin (12) is aligned with the discharge port of the fertilizer box (3). The lower end of the fertilizer bin (12) is provided with a discharge port (14), and adjacent fertilizer bins (12) are reinforced and connected by a reinforcing rod (15). The feeding wheel (17) is set in the inner cavity of the fertilizer bin (12). The rotating shaft (16) is driven by a servo motor on the frame (1). The feeding wheel (17) is fixedly installed on the rotating shaft (16). The side wall of the feeding wheel (17) is provided with a feeding groove (18). The feeding groove (18) is arranged in a circle around the feeding wheel (17). The fertilizer entering through the feed inlet (13) enters into the feeding groove (18), and under the rotation of the feeding wheel (17), the fertilizer in the feeding groove (18) is sent to the position of the discharge port (14).

4. A double-seedling seeder according to claim 3, characterized in that: The feeding wheel (17) has an alignment groove (39) on the side wall of the center hole, and the rotating shaft (16) has a spring clip clearance groove (40) on the side wall. A positioning spring clip (41) is integrally formed on the side wall of the clearance groove (40). When the feeding wheel (17) is fixedly installed on the rotating shaft (16), the positioning spring clip (41) is embedded in the alignment groove (39). The length of the feeding wheel (17) matches the width of the inner cavity of the fertilizer bin (12).

5. A double-seedling seeder according to claim 1, characterized in that: The seed metering device (7) includes a seed metering device body (42), a seed metering device cover plate (43), and a seeding tray (44). The seed metering device body (42) is fixed to the lower end of the seed box (5), and the seed hopper (48) port of the seed metering device body (42) is aligned with the seed drop port on the seed box (5). One seed metering device cover plate (43) is fixedly installed on each side of the seed metering device body (42). A rotating shaft (47) is rotatably installed on the seed metering device body (42), and the rotating shaft (47) is driven by a driving structure. A set of seeding trays (44) are symmetrically arranged, and the seeding trays (44) are fixed on the rotating shaft (47). Feeding holes (45) are evenly opened on the seeding trays (44).

6. A double-seedling seeder according to claim 5, characterized in that: A baffle (46) is fixedly connected to the inner wall of the seed metering cover (43). There is a gap between the baffle (46) and the seeding tray (44), and the gap between the baffle (46) and the seeding tray (44) is smaller than the particle size of the seed. An adsorption cavity is formed on the seed metering cover (43). The adsorption cavity is connected to an air extraction device through an air extraction pipe. When the air extraction device is running, the seeds in the seed bin (48) are adsorbed into the feeding hole (45) on the seeding tray (44). When the feeding hole (45) on the seeding tray (44) rotates to separate from the baffle (46), the seeds in the feeding hole (45) fall from the seed metering body (42) and into the seed groove.

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