Small seed seeder

Abstract

The present invention provides a small-grain seeder, which includes a frame, a seed and fertilizer box, and a sowing device, wherein the frame includes a first mounting frame and a second mounting frame, the first mounting frame and the second mounting frame are connected by an integral profiling mechanism, the seed and fertilizer box is arranged on the frame, and the seed and fertilizer box has a seed box and a fertilizer box that are independently arranged, and a seed discharge port and a fertilizer discharge port are arranged on the seed and fertilizer box, and the sowing device includes a plurality of single-body seed discharge devices arranged on the second mounting frame, each single-body seed discharge device includes a fixed bracket and a disc furrow opener, and the disc furrow opener is provided with a seeding tube hole and a fertilizer tube hole, the fixed bracket is connected to the second mounting frame, and a lifting rod is provided between the fixed bracket and the first connecting bracket, and the lifting rod can slide elastically relative to the first connecting bracket. The small-grain seeder of the present invention can realize the profiling function of overall and single-body sowing, thereby effectively improving the problem of inconsistent sowing depth of wave-shaped landforms, and is conducive to improving sowing quality.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a small-grain seeder. Background Art

[0002] As people's quality of life improves, the nutritional value of food is increasingly valued by consumers, and small-seed crops such as quinoa, flax and millet are gradually appearing in people's daily diets due to their high nutritional value and rich in various amino acids required by the human body. In recent years, with the change of green development concepts and consumption concepts and the continuous increase in scientific and technological research and development, they have gradually become the pillar crops for the development of sustainable agriculture in arid and semi-arid areas.

[0003] However, the characteristics of small-grain crop planting areas, such as drought, barrenness, and uneven terrain, have restricted the development of the industry, making planting difficult. Currently, improved wheat drills are generally used to complete sowing, but the sowing uniformity is poor, the sowing depth is inconsistent, and precision sowing cannot be achieved. Summary of the invention

[0004] In view of this, the present invention aims to provide a small-grain seeder that can generate elastic floating profiling according to the ground surface, thereby improving the problem of inconsistent sowing depth in wavy landforms.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A small-grain seeder comprises a frame, a seed and fertilizer box and a sowing device, wherein:

[0007] The frame comprises a first mounting frame and a second mounting frame, the first mounting frame and the second mounting frame are connected by an integral profiling mechanism, and the first mounting frame is provided with a connecting portion for connecting to an external power device;

[0008] The seed and fertilizer box is arranged on the frame, and the seed and fertilizer box has a seed box and a fertilizer box which are arranged separately, and a seed discharge port and a fertilizer discharge port are arranged on the seed and fertilizer box;

[0009] The sowing device includes a plurality of individual seeding devices arranged on the second mounting frame, each of the individual seeding devices includes a fixed bracket, and a disc furrow opener having a first disc and a second disc, the disc furrow opener is fixedly connected to the fixed bracket, and the disc furrow opener is provided with a seeding tube hole and a fertilizer tube hole, and forms a seed furrow on the moving path of the first disc and the second disc as the fixed bracket moves, the fixed bracket is respectively connected to the second mounting frame through a first connecting bracket and a second connecting bracket, and a lifting rod is provided between the fixed bracket and the first connecting bracket, and the lifting rod can elastically slide relative to the first connecting bracket.

[0010] Furthermore, the integral contouring mechanism includes a first mounting seat fixedly connected to the first mounting frame, and a second mounting seat fixedly connected to the second mounting frame, two connecting rods arranged in parallel are hingedly connected on the first mounting seat and the second mounting seat, and an adjusting rod is provided on the first mounting seat and the second mounting seat, and an elastic reset member is provided on the adjusting rod.

[0011] Furthermore, one end of the adjusting rod is rotatably mounted on the second mounting seat, and the other end passes through a rotating shaft arranged on the first mounting seat and is slidably arranged relative to the rotating shaft, and the elastic reset member is sleeved on the adjusting rod.

[0012] Furthermore, the fixed bracket includes a connecting plate and an arc-shaped cover plate fixedly connected together, the seeding tube hole and the fertilizing tube hole are arranged on the arc-shaped cover plate at intervals, and the seeding tube hole and the fertilizing tube hole are respectively connected to the seed discharge port and the fertilizer discharge port on the seed-fertilizer box accordingly, the seeds from the seeding tube hole can fall into the seed trench, and the fertilizer from the fertilizing tube hole falls into both sides of the seed trench due to the arrangement of the connecting plate on the fertilizer falling path.

[0013] Furthermore, a rotating pin is provided on the first connecting bracket, and a sliding hole is provided on the rotating pin. One end of the lifting rod is provided on the arc-shaped cover plate, and the other end is inserted into the sliding hole. An elastic member is sleeved on the lifting rod, and both ends of the elastic member are respectively pressed against the lifting rod and the first connecting bracket.

[0014] Furthermore, a positioning hole is provided on the lifting rod, and one end of the elastic member is positioned in the positioning hole through a positioning pin.

[0015] Furthermore, the positioning holes are multiple and are arranged at intervals on the lifting rod, and the positioning pin can be positioned in any of the positioning holes.

[0016] Furthermore, the small-grain seeder also includes a turning mechanism and a pressing roller assembly arranged at the rear of the frame.

[0017] Furthermore, the flipping mechanism includes a flip roller rotatably arranged on the frame, the flip roller is a cage-shaped structure, and the roller has a plurality of bent flip shaft tubes arranged along the circumference of the rotation axis.

[0018] Furthermore, the pressing roller assembly is rotatably connected to the frame, and includes a pressing roller body and a scraper plate assembly for scraping off accumulated soil on the pressing roller. A plurality of grooves are provided on the outer peripheral surface of the pressing roller body, and each of the grooves corresponds to the corresponding seed groove.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The small-grain seeder described in the present invention has an integral profiling mechanism arranged between the first mounting frame and the second mounting frame, and the lifting rod is elastically slidable relative to the first connecting bracket, so that the small-grain seeder has two independently operating split structures, and both split structures have a profiling function, so that during the sowing operation, elastic floating profiling can be generated according to the ground surface, and the problem of inconsistent sowing depth in the wavy landform can be effectively improved, thereby helping to improve the sowing quality.

[0021] In addition, the single seeding device can be used for sowing and fertilizing at the same time, and the applied fertilizer can be separated from the seeds put into the seed furrow, so it has the characteristics of diversified functions and better use effect.

[0022] In addition, by positioning the positioning pin with one of the positioning holes arranged on the lifting rod, the elastic force of the elastic member can be adjusted to achieve the depth adjustment of the disc furrow opener. The turning mechanism arranged at the rear of the frame can fill the seed furrow after sowing with soil, and at the same time, it can also re-turn the wheel furrow compacted by the wheel.

[0023] In addition, the provided pressing roller assembly facilitates compaction of the soil on both sides of the seed furrow, thereby improving the growth environment of the seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a front view of a small-grain seeder according to an embodiment of the present invention;

[0026] Figure 2 It is a three-dimensional diagram of the small-grain seeder according to an embodiment of the present invention;

[0027] Figure 3 A structural schematic diagram of the small-grain seeder according to an embodiment of the present invention from another perspective;

[0028] Figure 4 A partial diagram of a small-grain seeder according to an embodiment of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the overall profiling mechanism according to an embodiment of the present invention;

[0030] Figure 6 A schematic structural diagram of the overall profiling mechanism according to an embodiment of the present invention from another perspective;

[0031] Figure 7 It is a structural schematic diagram of a single-body seed discharge device according to an embodiment of the present invention;

[0032] Figure 8 It is a structural schematic diagram of another perspective of the monomer seed discharge device according to an embodiment of the present invention;

[0033] Fig. 9 A top view of a single-body seed discharging device according to an embodiment of the present invention;

[0034] Fig.10 It is a structural schematic diagram of a seeding wheel according to an embodiment of the present invention;

[0035] Fig.11 It is a structural schematic diagram of the turning mechanism according to an embodiment of the present invention;

[0036] Fig.12 It is a schematic structural diagram of the flip roller according to an embodiment of the present invention;

[0037] Fig.13 It is a structural schematic diagram of the pressing roller according to an embodiment of the present invention;

[0038] Description of reference numerals:

[0039] 1. Frame; 2. Overall profiling mechanism; 3. Seed and fertilizer box; 4. Single-body seeding device; 5. Turning roller; 6. Suppression roller assembly; 7. Scraper assembly; 8. Height adjustment device; 10. Ground wheel; 11. First mounting frame; 12. Second mounting frame; 20. First chain; 21. Second mounting seat; 22. First mounting seat; 23. Connecting rod; 24. Rotating shaft; 25. Adjusting rod; 26. Spring; 30. Second chain; 31. Fertilizer box; 32. Seed box; 33. Seeding shaft; 3 4. Seed wheel; 35. Seed opening; 41. First connecting bracket; 42. Second connecting bracket; 43. Lifting rod; 44. Positioning pin; 45. First disc; 46. Second disc; 47. Connecting plate; 48. Arc cover plate; 50. Reinforcement plate; 51. Round plate; 52. Central shaft tube; 53. Turning shaft tube; 54. Bearing; 61. First round tube; 62. Pressing roller body; 63. End plate; 64. Shaft head; 71. Mounting shaft; 72. Scraper plate; 73. U-shaped bolt;

[0040] 111. Side mounting seat; 112. Middle mounting seat; 121. Mounting tube; 122. Adjusting tube; 123. Adjusting screw; 211. First connecting end; 212. Second connecting end; 221. Third connecting end; 340. Rectangular shaft hole; 341. First row of seed grooves; 342. Second row of seed grooves; 343. Spherical protrusion; 431. Positioning hole; 451. Seeding tube hole; 452. Fertilizing tube hole; 621. Groove. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0042] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0045] This embodiment relates to a small-grain seeder, which mainly includes a frame 1, a seed fertilizer box 3 and a sowing device in terms of overall structure, wherein the sowing device includes a plurality of single-unit seeding devices 4, each of which can elastically float and imitate, thereby making the small-grain seeder have two independently operated split structures, and both split structures have a profiling function, so that during the sowing operation, elastic floating profiling can be generated according to the ground surface, and the problem of inconsistent sowing depth in the wavy landform can be effectively improved, thereby helping to improve the sowing quality. At the same time, the single-unit seeding device 4 can be used for sowing and fertilizing at the same time, and the applied fertilizer can be separated from the seeds put into the seed furrow, and has the characteristics of diversified functions.

[0046] Based on the above design concept, an exemplary structure of the small grain seeder of this embodiment is as follows: Figures 1 to 4 As shown, as mentioned above, the small seed seeder includes a frame 1, a seed fertilizer box 3 and a sowing device. The frame 1 includes two parts, a first mounting frame 11 and a second mounting frame 12. The first mounting frame 11 is provided with a ground wheel 10 and a connecting part for connecting with an external power device, such as a tractor. The connecting part is as shown in FIG. Figures 1 to 4As shown in the figure, it includes side mounting seats 111 located on both sides of the first mounting frame 11, and an intermediate mounting seat 112 located in the middle of the first mounting frame 11. The connection between the first mounting frame 11 and the external power device is achieved by setting the two side mounting seats 111 and the one intermediate mounting seat 112.

[0047] It should be noted that the connection structure between the first mounting bracket 11 and the external power device can refer to the mature structure in the prior art, and will not be described in detail here.

[0048] The seed-fertilizer box 3 of this embodiment is arranged on the frame 1, and the seed-fertilizer box 3 has a seed box 32 and a fertilizer box 31 which are independently arranged, and a seed discharge port 35 and a fertilizer discharge port are provided on the seed-fertilizer box 3. The seeds and fertilizers in the seed-fertilizer box 3 are discharged by rotating a seed discharge shaft 33 and a fertilizer discharge shaft provided on the seed-fertilizer box 3, respectively, wherein a seed discharge wheel 34 is provided on the seed discharge shaft 33 corresponding to the seed discharge port 35, and a fertilizer discharge wheel is provided on the fertilizer discharge shaft corresponding to the fertilizer discharge port, thereby being helpful in controlling the amount of seeds and fertilizers discharged.

[0049] As a preferred implementation of this embodiment, in this embodiment, the first mounting frame 11 and the second mounting frame 12 are connected by an integral profiling mechanism 2. In terms of specific structure, Figures 1 to 4 Combined with Figure 5 and Figure 6 As shown, a plurality of second mounting frames 12 are connected to the first mounting frame 11 through an integral profiling mechanism 2. In this embodiment, two second mounting frames 12 are connected to the first mounting frame 11 through four integral profiling mechanisms 2, and two groups of monomer seeding devices 4 mentioned below are arranged on each second mounting frame 12. The two groups of monomer seeding devices 4 are arranged front and back along the sowing direction, and each group is arranged with 6 at intervals, that is, there are two 12 rows of monomer seeding devices 4. Corresponding to the number of second mounting frames 12, the number of seed and fertilizer boxes 3 is consistent with the number of second mounting frames 12.

[0050] like Figure 5 and Figure 6 As shown, the overall profiling mechanism 2 of this embodiment specifically includes a first mounting seat 22 fixedly connected to the first mounting frame 11, and a second mounting seat 21 fixedly connected to the second mounting frame 12, two connecting rods 23 arranged in parallel are hingedly connected on the first mounting seat 22 and the second mounting seat 21, and an adjusting rod 25 is provided on the first mounting seat 22 and the second mounting seat 21, and an elastic reset member is provided on the adjusting rod 25, so that when the overall profiling mechanism 2 is deformed due to external force, it can be elastically reset by the action of the elastic reset member.

[0051] Specifically, the first mounting seat 22 is fixedly connected to the second mounting frame 12 via the first connecting end 211 and the second connecting end 212 provided thereon, and the second mounting seat 21 is fixedly connected to the second mounting frame 12 via the third connecting end 221 provided thereon. The first connecting end 211 and the third connecting end 221 are connected to the second mounting frame 12 by welding, and the second connecting end 212 is fixedly connected to the second mounting frame 12 by bolts or U-bolts.

[0052] The above-mentioned adjustment rod 25 has one end rotatably mounted on the second mounting seat 21, and the other end is slidably mounted relative to the first mounting seat 22. Specifically, a rotating shaft 24 is hinged on the first mounting seat 22, and a through hole is provided on the rotating shaft 24. The end of the adjustment rod 25 passes through the through hole and can be slidably mounted along the through hole, and the elastic reset member is sleeved on the adjustment rod 25, and the two ends of the elastic reset member are respectively pressed against the adjustment rod 25 and the rotating shaft 24, so that the adjustment rod 25 can be elastically slidably mounted relative to the rotating shaft 24, that is, the first mounting seat 22. It is worth noting that the elastic reset member of this embodiment is preferably a spring 26.

[0053] The sowing device of this embodiment specifically includes a plurality of individual seeding devices 4 arranged on a second mounting frame 12, wherein each individual seeding device 4 includes a fixed bracket and a disc furrow opener having a first disc 45 and a second disc 46, the disc furrow opener is fixedly connected to the fixed bracket, and forms a seed furrow on the moving path of the first disc 45 and the second disc 46 as the fixed bracket moves.

[0054] Specifically, the first disc 45 and the second disc 46 are disposed on both sides of the fixed bracket and are arranged symmetrically in an inclined shape, and the first disc 45 and the second disc 46 have front ends that abut against each other and rear ends that are separated from each other. Figures 7 to 9 As shown, the first disc 45 and the second disc 46 are fixedly connected to the fixed bracket by a curved pin shaft, so that the first disc 45 and the second disc 46 are arranged symmetrically in an inclined shape, that is, the plane direction of the first disc 45 and the second disc 46 has a certain deviation angle with the forward direction. In this way, the front end of the first disc 45 and the second disc 46 abutting against each other can push the soil in front to the side, and the rear end of the first disc 45 and the second disc 46 separated from each other forms a seed groove, which is beneficial to sowing and fertilizing.

[0055] Of course, it is understandable that in addition to using a curved pin shaft to make the first disk 45 and the second disk 46 arranged in an inclined symmetrical manner, two split pin shafts can also be correspondingly set on the first disk 45 and the second disk 46, and the central axes of the two split pin shafts are set at an angle, and the two split pin shafts are fixedly connected to the connecting plate 47, which can also realize the first disk 45 and the second disk 46. The symmetrical arrangement.

[0056] The fixed bracket is connected to the second mounting bracket 12 through the first connecting bracket 41 and the second connecting bracket 42, respectively, wherein the first connecting bracket 41 is screwed to the second mounting bracket 12 through the connecting hole provided on itself, and the second connecting bracket 42 is welded to the second mounting bracket 12 through the V-shaped notch formed on itself. A lifting rod 43 is provided between the fixed bracket and the first connecting bracket 41, and the lifting rod 43 can slide elastically relative to the first connecting bracket 41. Specifically, the fixed bracket includes a connecting plate 47 and an arc-shaped cover plate 48 fixedly connected together, and a reinforcing plate 50 fixedly connected to the arc-shaped cover plate 48 and the pin shaft, wherein the connecting plate 47 is fixedly connected to the arc-shaped cover plate 48 and the reinforcing plate 50, so as to improve the strength of the fixed bracket.

[0057] In addition, in the present embodiment, a seeding tube hole 451 and a fertilizer tube hole 452 are provided at intervals on the arc-shaped cover plate 48, and the seeding tube hole 451 and the fertilizer tube hole 452 correspond to the seed discharge port 35 and the fertilizer discharge port connected to the seed-fertilizer box 3, respectively. The seeds from the seeding tube hole 451 can fall into the seed trench, and the fertilizer from the fertilizer tube hole 452 can fall into both sides of the seed trench due to the setting of the connecting plate 47 on the fertilizer falling path.

[0058] It should be noted that, along the trenching direction, the fertilizer tube hole 452 is located in front of the seeding tube hole 451, and the connecting plate 47 is located on the fertilizer falling path, that is, Fig. 9 As shown in the figure, the connecting plate 47 can play a separating role in the falling process of the fertilizer, so that the fertilizer is diverted through the fertilizer pipe hole 452 in the falling process, and falls along the two sides of the connecting plate 47 to the two sides of the seed trench, thereby being separated from the seeds in the seed trench by a certain distance.

[0059] It should also be pointed out that the seeding tube hole 451 and the fertilizer tube hole 452 are connected to the corresponding seed discharge port 35 and fertilizer discharge port through the seed delivery tube and the fertilizer delivery tube, respectively, thereby allowing seeds and fertilizers to be smoothly dropped into the seed furrow.

[0060] In terms of specific structure, Figures 1 to 4 Combined with Figures 7 to 9 As shown, in this embodiment, the first connecting bracket 41 and the second connecting bracket 42 are respectively arranged on the arc-shaped cover plate 48 and the connecting plate 47, the seeding tube hole 451 and the fertilizer tube hole 452 are located between the first connecting bracket 41 and the second connecting bracket 42, and along the ditching forward direction, the fertilizer tube hole 452 is located in front of the seeding tube hole 451. In addition, a rotating pin is provided on the first connecting bracket 41, and a sliding hole is provided on the rotating pin. One end of the lifting rod 43 is provided on the arc-shaped cover plate 48, and the other end is inserted into the sliding hole, and an elastic member is sleeved on the lifting rod 43, and the two ends of the elastic member are respectively pressed against the lifting rod 43 and the first connecting bracket 41.

[0061] like Figure 7and Figure 8 As shown, the cross section of the lifting rod 43 is set to be rectangular. In order to facilitate the fixing of the elastic member, in this embodiment, a positioning hole 431 is provided on the lifting rod 43, and one end of the elastic member is positioned in the positioning hole 431 through a positioning pin 44. Among them, the elastic member of this embodiment is preferably a spring 26, one end of which is locked in the positioning hole 431 on the lifting rod 43 through a positioning pin 44, and the other end is pressed against the first connecting bracket 41. The positioning pin 44 is W-shaped and inserted into the positioning hole 431. Therefore, through the setting of the lifting rod 43 and the spring 26, and the cooperation of the positioning pin 44 and the positioning hole 431, the disc furrowing device can smoothly furrow and sow on uneven terrain, and has the characteristics of strong applicability, simple structure and easy installation and operation.

[0062] As a preferred implementation of this embodiment, in order to facilitate the adjustment of the depth of the furrowing by the disc furrow opener, in this embodiment, a plurality of positioning holes 431 are arranged at intervals on the lifting rod 43, and the positioning pin 44 can be positioned in any positioning hole 431. By positioning and installing the positioning pin 44 in different positioning holes 431, the elastic force of the elastic member can be adjusted, thereby achieving the adjustment of the depth of the furrowing by the disc furrow opener.

[0063] In this embodiment, the seeding shaft 33 rotatably arranged on the seed fertilizer box 3 has a cylindrical shaft neck and a shaft body with a rectangular cross section, and a plurality of seeding wheels 34 are arranged on the shaft body at intervals. Fig.10 As shown, the seeding wheel 34 is provided with a rectangular shaft hole 340, and a plurality of first seeding grooves 341 are evenly distributed on the circumference of the seeding wheel 34, and the first seeding grooves 341 are used to accommodate small-grain seeds with a large sowing amount or seeds with a slightly larger particle size. In addition, an outwardly convex ring body is also provided on the seeding wheel 34, and two groups of spherical protrusions 343 are arranged on the ring body along its own circumference. The multiple spherical protrusions 343 in each group are evenly staggered, and a second seeding groove 342 is formed between two adjacent spherical protrusions 343 to accommodate small-grain seeds.

[0064] With the above structure, the seed wheel 34 of this embodiment can meet the seeding operation of row-sown crops with different seeding amounts and different particle sizes.

[0065] In addition, to facilitate the smooth rotation of the seeding shaft 33, in the present embodiment, a first transmission gear is provided at one end of the seeding shaft 33, and an intermediate transmission gear is provided on the second mounting frame 12, and a second transmission gear is provided at one end of the press roller assembly 6 described below. By means of the first chain 20 wound around the first transmission gear and the intermediate transmission gear, and the second chain 30 wound around the intermediate transmission gear and the second transmission gear, the rotation of the ground wheel 10 drives the press roller assembly 6 to rotate, and at the same time drives the rotation of the seeding shaft 33, thereby achieving smooth sowing.

[0066] In addition, as a further improvement of this embodiment, the small-grain seeder of this embodiment further includes a turning mechanism and a pressing roller assembly 6 arranged at the rear of the frame 1. Figures 11 to 13 As shown, the turning mechanism includes a turning roller 5 rotatably arranged on the frame 1, and the turning roller 5 is a cage-shaped structure as a whole, and the roller has a plurality of bent turning shaft tubes 53 arranged along the circumference of the rotating shaft. The pressing roller assembly 6 is rotatably connected to the frame 1, and the pressing roller assembly 6 includes a pressing roller body 62 and a scraper plate assembly 7 for scraping off the accumulated soil on the pressing roller body 62. A plurality of grooves 621 are provided on the outer circumferential surface of the pressing roller body 62, and each groove 621 is arranged corresponding to a corresponding seed groove.

[0067] Specifically, if Fig.11 and Fig.12 As shown, the turning mechanism of this embodiment includes a turning roller 5 rotatably arranged on the frame 1, and the turning roller 5 includes a plurality of circular plates 51 arranged at intervals, wherein a central shaft tube 52 is provided at the center of each circular plate 51, and a plurality of bent turning shaft tubes 53 are provided at intervals in the circumferential direction of each circular plate 51, and in addition, both ends of the central shaft tube 52 are rotatably arranged on the second mounting frame 12 through bearings 54. Thus, driven by the ground wheel 10, the seed furrow after sowing can be filled with soil, and at the same time, the wheel furrow compacted by the wheel can be re-turned.

[0068] like Fig.11 and Fig.13 As shown, the pressing roller assembly 6 of this embodiment specifically includes a hollow pressing roller body 62, an end plate 63 located at the end of the pressing roller body 62, and a first round tube 61 arranged at the center of the pressing roller, wherein shaft heads 64 are respectively fixedly connected to both ends of the first round tube 61, the pressing roller body 62 is rotatably connected to the frame 1 through the shaft heads 64, and a plurality of grooves 621 are arranged on the outer circumference of the pressing roller body 62, each groove 621 is arranged circumferentially around the pressing roller body 62, and each groove 621 corresponds to a variety of grooves. Thus, the soil on both sides of the seed groove can be compacted, thereby improving the growth environment of the seeds.

[0069] In addition, in order to adjust the pressing depth of the pressing roller assembly 6, in this embodiment, Fig.11As shown, a height adjustment device 8 is provided between the second mounting frame 12 and the pressure roller assembly 6, and the height adjustment device 8 includes a mounting tube 121 fixedly connected to the tail end of the second mounting frame 12, and an adjustment tube 122 sleeved in the mounting tube 121. One end of the adjustment tube 122 is connected to the pressure roller assembly 6, and the other end is fixedly connected to an adjustment screw 123, the adjustment screw 123 is arranged through the mounting tube 121, and is screwed to the end of the mounting tube 121, and the adjustment screw 123 has an exposed end extending out of the mounting tube 121, and the exposed end is arranged in a bent shape to facilitate the operation of the exposed end to rotate, so that under the rotation of the adjustment screw 123, the adjustment tube 122 can be telescopically arranged relative to the mounting tube 121, thereby realizing the height adjustment of the pressure roller assembly 6.

[0070] In addition, in order to facilitate the scraping of the soil adhering to the roller body 62, in this embodiment, still refer to Fig.11 As shown, the pressure roller assembly 6 is provided with a scraper plate assembly 7 for scraping off the soil on the pressure roller body 62. Specifically, both ends of the pressure roller body 62 are provided with a rotating mounting seat, one end of the adjusting tube 122 is connected to the rotating mounting seat, and a support rod is provided on the rotating mounting seat, and the scraper plate assembly 7 is installed on the support rod.

[0071] The scraper blade assembly 7 includes a mounting shaft 71 arranged at an axial distance from the roller body 62 of the pressure roller, the mounting shaft 71 having a shaft body with a rectangular cross section, and the mounting shaft 71 is connected to the support rod through a U-shaped bolt 73. A plurality of scraper blades 72 are fixedly connected to the shaft body, each of which is formed with a wavy scraper end, each scraper end being arranged corresponding to a groove 621 formed on the roller body 62 of the pressure roller, thereby facilitating the scraping of soil adhering to the groove 621 and improving the pressure effect.

[0072] The small-grain seeder of this embodiment adopts two independently operated split structures, and both split structures have a profiling function, so that during the sowing operation, elastic floating profiling can be generated according to the ground surface, and the problem of inconsistent sowing depth in the wavy landform is effectively improved, which is conducive to improving the sowing quality. In addition, the single seeding device 4 can be used for sowing and fertilizing at the same time, and the applied fertilizer can be separated from the seeds put into the seed furrow, and has the characteristics of diversified functions. At the same time, it can meet the sowing operations of different sowing amounts and different row-sown crops, and has a good use effect.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A small-grain seeder, characterized in that: It comprises a frame (1), a seed and fertilizer box (3) and a sowing device, wherein: The frame (1) comprises a first mounting frame (11) and a second mounting frame (12), the first mounting frame (11) and the second mounting frame (12) being connected via an integral profiling mechanism (2), and the first mounting frame (11) is provided with a connecting portion for connecting to an external power device; The seed and fertilizer box (3) is arranged on the frame (1), and the seed and fertilizer box (3) comprises a seed box (32) and a fertilizer box (31) which are arranged separately, and a seed discharge port (35) and a fertilizer discharge port are arranged on the seed and fertilizer box (3); The sowing device comprises a plurality of single seeding devices (4) arranged on the second mounting frame (12), each of the single seeding devices (4) comprising a fixed support and a disc furrow opener having a first disc (45) and a second disc (46), the disc furrow opener being fixedly connected to the fixed support, and being provided with a seeding tube hole (451) and a fertilizer tube hole (452), and forming a seed furrow on a moving path of the first disc (45) and the second disc (46) as the fixed support moves, the fixed support being connected to the second mounting frame (12) via a first connecting support (41) and a second connecting support (42), and a lifting rod (43) being provided between the fixed support and the first connecting support (41), and the lifting rod (43) being elastically slidable relative to the first connecting support (41); The integral profiling mechanism (2) comprises a first mounting seat (22) fixedly connected to the first mounting frame (11), and a second mounting seat (21) fixedly connected to the second mounting frame (12), two connecting rods (23) arranged in parallel are hingedly connected to the first mounting seat (22) and the second mounting seat (21), and adjustment rods (25) are provided on the first mounting seat (22) and the second mounting seat (21), and an elastic reset member is provided on the adjustment rod (25); One end of the adjusting rod (25) is rotatably mounted on the second mounting seat (21), and the other end passes through a rotating shaft (24) mounted on the first mounting seat (22) and is slidably mounted relative to the rotating shaft (24), and the elastic reset member is sleeved on the adjusting rod (25); The fixed bracket comprises a connecting plate (47) and an arc-shaped cover plate (48) which are fixedly connected together; the seeding tube hole (451) and the fertilizer tube hole (452) are arranged on the arc-shaped cover plate (48) at intervals, and the seeding tube hole (451) and the fertilizer tube hole (452) are respectively connected to the seed discharge port (35) and the fertilizer discharge port on the seed-fertilizer box (3); the seeds from the seeding tube hole (451) can fall into the seed trench, and the fertilizer from the fertilizer tube hole (452) can fall into both sides of the seed trench due to the arrangement of the connecting plate (47) on the fertilizer falling path; A rotating pin is provided on the first connecting bracket (41), and a sliding hole is provided on the rotating pin. One end of the lifting rod (43) is provided on the arc-shaped cover plate (48), and the other end is inserted into the sliding hole. An elastic member is sleeved on the lifting rod (43), and two ends of the elastic member are respectively pressed against the lifting rod (43) and the first connecting bracket (41); The lifting rod (43) is provided with a positioning hole (431), and one end of the elastic member is positioned in the positioning hole (431) via a positioning pin (44).

2. The small-grain seeder according to claim 1, characterized in that: The positioning holes (431) are multiple and are arranged at intervals on the lifting rod (43), and the positioning pin (44) can be positioned in any of the positioning holes (431).

3. The small-grain seeder according to claim 1 or 2, characterized in that: The small-grain seeder also includes a turning mechanism and a pressing roller assembly (6) arranged at the rear of the frame (1).

4. The small-grain seeder according to claim 3, characterized in that: The turning mechanism comprises a turning roller (5) rotatably arranged on the frame (1); the turning roller (5) is a cage-shaped structure, and the roller has a plurality of bent turning shaft tubes (53) arranged along the circumference of the rotation axis.

5. The small-grain seeder according to claim 3, characterized in that: The pressing roller assembly (6) is rotatably connected to the frame (1), and comprises a pressing roller body (62) and a scraper plate assembly (7) for scraping off soil accumulated on the pressing roller, wherein a plurality of grooves (621) are provided on the outer peripheral surface of the pressing roller body (62), and each of the grooves (621) is arranged corresponding to a corresponding seed groove.

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