A seed drill with a soil covering roller and a seed drill

Abstract

The utility model discloses a kind of soil covering roller for seeding machine and seeding machine, it is related to the field of seeding machine, including roller body and mounting bracket, the roller body is set on the mounting bracket, the mounting bracket is connected with the seeding machine, the mounting bracket includes cantilever structure that can rotate relative to the mounting bracket, the roller body is fixed with the cantilever structure and is supported on the mounting bracket by the cantilever structure, the roller body is equipped with soil inlet, the cantilever structure is set away from the soil inlet. The utility model has the advantage that soil covering roller soil inlet is not easy to be blocked.

Description

Technical Field

[0001] This utility model relates to the field of seeders, specifically to a soil covering roller for a seeder and a seeder. Background Technology

[0002] Seeders have various types of covering rollers, which can be roughly divided into two types: shafted and shaftless. Shaftless rollers are supported by rollers on the outside of the roller. This type of structure is usually more expensive. Shafted rollers are supported by a rod between the shaft and the roller. The rod is usually welded to the outermost part of the inside of the roller. Therefore, it is easy to get clogged in some soils with stones or crop residues. Therefore, a new type of cantilever shafted covering roller has been designed.

[0003] In the field of agricultural machinery, seeders are important tillage equipment used to sow seeds into the soil at specific plant spacing, row spacing, and depth. Among these components, the covering roller is a key part of the seeder. Its main function is to cover the seeds with soil after they have been sown, ensuring that the seeds are properly covered and creating a favorable soil environment for germination. Covering rollers come in various forms, and different structural designs significantly impact the covering effect, operational efficiency, and applicable scenarios.

[0004] Currently, the covering rollers of seeders can be broadly classified into two types: those with shafts and those without. Shaftless rollers rely on rollers on the outer side of the roller as a support structure. This support method makes the roller relatively flexible during operation and can adapt to different terrains and working conditions to a certain extent. However, due to the structural characteristics of shaftless rollers, their manufacturing process is relatively complex and costly; therefore, shafted rollers also exist on the market.

[0005] Existing shafted rollers use a rod between the shaft and the roller as support, and the rotation of the shaft drives the roller to rotate, thereby achieving the function of covering soil. The structure of shafted rollers is relatively simple and the manufacturing process is not difficult. However, in actual operation, shafted rollers are prone to clogging when working in soil containing stones or crop residues. Utility Model Content

[0006] This utility model aims to solve one of the technical problems in related technologies to a certain extent. To this end, this utility model provides a soil covering roller for a seeder and a seeder, which has the advantage that the soil inlet of the soil covering roller is not easily blocked.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A soil covering roller for a seeder includes a roller body and a mounting frame. The roller body is disposed on the mounting frame, and the mounting frame is connected to the seeder. The mounting frame includes a cantilever structure that can rotate relative to the mounting frame. The roller body is fixedly connected to the cantilever structure and supported on the mounting frame by the cantilever structure. The roller body has a soil inlet, and the cantilever structure is disposed away from the soil inlet.

[0008] In this application, the covering roller consists of a roller body and a mounting frame. The roller body has an inlet for soil to enter, and internal space is reserved to accommodate soil. The mounting frame connects the covering roller to the seeder. The mounting frame includes a cantilever structure, which is rotatable relative to the mounting frame. One end of the cantilever structure is fixed to the roller body, and the other end is connected to the mounting frame, forming a support for the roller. Furthermore, the cantilever structure is positioned away from the inlet, thus not occupying the space of the inlet and leaving a path for the soil to enter. When the seeder moves, the field soil (including fine root debris and small pebbles) needs to enter the roller body through the inlet. Because the cantilever structure is far from the inlet, it does not physically obstruct the soil entry path, allowing the soil to enter the roller body smoothly, thereby reducing inlet blockage.

[0009] Optionally, the roller body has a cavity along its own axial direction, the cavity is connected to the soil inlet, and the cantilever structure is fixed in the cavity.

[0010] The drum body has a cavity along its own axial direction, which is connected to the soil inlets at both ends of the drum to receive the soil entering the drum body. At this time, the cantilever structure rotates coaxially with the drum body, while the cantilever structure is fixed in the cavity. This avoids the cantilever structure being exposed and occupying space, and also supports the drum body through the support points in the cavity.

[0011] Optionally, the cantilever structure includes a central tube, a first support rod, and a second support rod; one end of the first support rod and the second support rod are both fixedly connected to the outer periphery of the central tube, and the other end of both are fixedly connected to the cavity wall; the central tube is rotatably connected to the mounting frame.

[0012] The axis of the central tube is aligned with the axis of the drum body, and its two ends are rotated with the mounting frame to provide the axis for the rotation of the drum body. One end of the first support rod and the second support rod are fixed to the outer circumference of the central tube (preferably welded), and the other end is fixed vertically or obliquely to the cavity wall. The first support rod and the second support rod are distributed at a preset angle on the outer circumference of the central tube, and together with the central tube and the cavity wall, they form a stable triangular support structure. The cantilever structure is completely built into the cavity and does not exceed the radial range of the cavity, making the overall structure of the drum more compact.

[0013] Optionally, the included angle between the axis of the first support rod and the axis of the second support rod is 120°.

[0014] The 120° angle ensures both support strength and provides ample space for soil flow within the cavity. After entering through the inlets at both ends of the covering roller, the soil flows evenly along the gaps to the covering seams around the roller, preventing soil stagnation caused by excessively small support rod angles and further reducing the risk of blockage. Furthermore, the applicant's research has found that the 120° angle maximizes the synergistic load-bearing capacity of the first and second support rods, making the supporting structure less prone to deformation when handling heavy clay soils or encountering rock impacts, thus extending its service life.

[0015] Optionally, the mounting frame includes a frame located on both sides of the roller body, a connecting pipe fixed to the frame, and a bearing seat fixed to the connecting pipe. A connecting shaft extending out of the bearing seat and fixedly connected to the central pipe is rotatably disposed inside the bearing seat.

[0016] The frame is symmetrically distributed on both sides of the roller body, serving as a fixed base for the mounting frame and directly connected to the seeder body. A connecting pipe is horizontally fixed between the two frames, with a bearing seat installed at the end of the connecting pipe near the cantilever structure. The bearing seat contains a bearing that allows for rotational engagement with the connecting shaft. One end of the connecting shaft extends from the bearing seat, and the other end is fixedly connected to the central tube of the cantilever structure (e.g., by welding or bolting), allowing the central tube to form a rotatable support with the bearing seat via the connecting shaft, ultimately enabling the roller body to rotate around the axis of the connecting shaft. Specifically, the seeder's transmission system (e.g., chain, belt) drives the connecting shaft to rotate. Since the connecting shaft is fixed to the central tube, the rotational force is directly transmitted to the cantilever structure, and then, through the first and second support rods, drives the roller body to rotate synchronously, completing the soil covering operation.

[0017] Optionally, the central tube is hollow, the end of the connecting shaft extends into the central tube, and the connecting shaft and the central tube are fixed together by a number of set screws.

[0018] The central tube has a hollow structure to facilitate the installation of the connecting shaft. The end of the connecting shaft extends into the hollow central tube, forming a nested shaft-tube fit. To ensure synchronous rotation and a secure connection, the two are fixed together by several set screws. The set screws are screwed radially into pre-drilled holes on the central tube, with their ends pressing tightly against the outer circumference of the connecting shaft. Friction is used to limit the relative displacement between the connecting shaft and the central tube, ensuring reliable power transmission and facilitating disassembly and adjustment. When maintenance or component replacement is required, the connecting shaft and central tube can be separated by loosening the set screws, making the operation flexible and convenient.

[0019] Optionally, the connecting tube extends at least partially into the cavity.

[0020] The connecting pipe extends at least partially into the cavity of the roller body, making the mounting frame structure more compact. This eliminates the need for excessive space on the outside of the roller body for the connecting pipe installation and shortens the distance between the connecting pipe and the central pipe and bearing seat. This allows for more direct force transmission throughout the support structure, reducing swaying. Furthermore, the partial insertion of the connecting pipe into the cavity prevents it from bumping against soil clods and root debris on the outside of the roller body, reducing the risk of damage.

[0021] Optionally, the connecting pipe is connected to the bearing housing via an arc-shaped plate.

[0022] The connecting pipe and bearing housing are connected by an arc-shaped plate. The transition of the arc-shaped plate makes the connection between the connecting pipe and bearing housing smoother, distributes the stress at the connection point, and makes it less likely to break.

[0023] Optionally, the roller body has soil inlets at both ends along its own axial direction, and the cantilever structure is located in the middle region of the roller body along its own axial direction between the two soil inlets.

[0024] The roller body has soil inlets at both ends, while the cantilever structure is located between the two inlets, that is, in the middle area of ​​the roller body along its own axis. The cantilever structure does not block the soil inlets at both ends of the roller body, allowing soil to enter smoothly from both ends of the roller body, reducing the possibility of blockage. At the same time, the cantilever structure supporting the middle position of the roller body also makes the rotation of the roller body more stable.

[0025] Furthermore, this utility model also provides a seeder, including a soil-covering roller, wherein the soil-covering roller includes any of the aforementioned soil-covering rollers. The reasoning process for the beneficial effects of the seeder provided by this utility model and the aforementioned soil-covering rollers is similar, and will not be repeated here.

[0026] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the soil-covering roller for the seeder in this embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the soil-covering roller for the seeder in this embodiment of the present invention, with the roller body hidden. Figure 3This is a cross-sectional view of the soil-covering roller for the seeder in an embodiment of this utility model.

[0028] Among them, 1. Roller body; 11. Soil inlet; 12. Cavity; 2. Mounting frame; 21. Cantilever structure; 211. Central tube; 212. First support rod; 213. Second support rod; 22. Frame; 23. Connecting pipe; 24. Bearing seat; 241. Connecting shaft; 25. Arc plate; 26. Top screw. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0030] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0031] Example: like Figure 1 and Figure 2 As shown, a soil covering roller for a seeder includes a roller body 1 and a mounting frame 2. The roller body 1 is mounted on the mounting frame 2, and the mounting frame 2 is connected to the seeder. The mounting frame 2 includes a cantilever structure 21 that can rotate relative to the mounting frame 2. The roller body 1 is fixedly connected to the cantilever structure 21 and supported on the mounting frame 2 by the cantilever structure 21. The roller body 1 has a soil inlet 11, and the cantilever structure 21 is located away from the soil inlet 11.

[0032] In this embodiment, the covering roller consists of a roller body 1 and a mounting frame 2. The roller body 1 has an inlet 11 for soil to enter, and its interior is reserved to accommodate soil. The mounting frame 2 is used to connect the covering roller to the seeder. The mounting frame 2 includes a cantilever structure 21, which is rotatable relative to the mounting frame 2. One end of the cantilever structure 21 is fixed to the roller body 1, and the other end is connected to the mounting frame 2, forming a support for the roller. In addition, the cantilever structure 21 is located away from the inlet 11, so as not to occupy the space of the inlet 11, leaving a path for the soil to enter. When the seeder moves, the field soil (including fine root debris and small stones) needs to enter the roller body 1 through the inlet 11. Since the cantilever structure 21 is far from the soil inlet 11, it does not physically block the soil inlet channel, allowing the soil to enter the drum body 1 smoothly. At the same time, the cantilever structure 21 rotates in conjunction with the mounting frame 2, and the drum body 1, which is fixed to the cantilever structure 21, rotates synchronously. The soil that enters moves with the inner wall of the drum, and the soil that meets the covering requirements leaks out from the gaps in the drum body 1. During this process, the cantilever structure 21 will not get tangled or collide with the soil or debris, thus avoiding the drum from getting stuck and reducing blockages.

[0033] In existing technologies, shafted rollers rely on a rod between the shaft and the roller for support. This rod is typically welded to the outermost part of the roller's interior, making it prone to clogging in soil containing stones or crop residue. In this embodiment, the cantilever structure 21 is positioned away from the inlet 11, avoiding the problem of the shafted roller's support structure obstructing the inlet 11 and reducing the accumulation of soil, crop residue, and stones at the inlet 11. Furthermore, reduced clogging means less frequent shutdown for cleaning, allowing the seeder to maintain stable movement and improving operational efficiency. It should be noted that the cantilever structure 21 being positioned away from the inlet 11 means that there is a certain distance between the cantilever structure 21 and the inlet 11. This reasonable spatial distance prevents the cantilever structure 21 from obstructing the soil's entry path and avoids debris accumulation and clogging between the inlet 11 and the cantilever structure 21, while also providing support through the roller body 1's support points.

[0034] The roller body 1 has a cavity 12 along its own axial direction. The cavity 12 is connected to the soil inlet 11, and the cantilever structure 21 is fixed inside the cavity 12.

[0035] In this embodiment, the roller body 1 has a cavity 12 along its axial direction, which communicates with the soil inlets 11 at both ends of the roller to receive soil entering the roller body 1. At this time, the cantilever structure 21 rotates coaxially with the roller body 1, while the cantilever structure 21 is fixed within the cavity 12. This avoids the cantilever structure 21 being exposed and occupying space, and also provides support for the roller body 1 through the support points within the cavity 12. In other embodiments, the cantilever structure 21 can also be disposed on the outer surface of the roller body 1, in which case the roller body 1 will rotate around the cantilever structure 21.

[0036] like Figure 2and Figure 3 As shown, the cantilever structure 21 includes a central tube 211, a first support rod 212, and a second support rod 213. One end of the first support rod 212 and the second support rod 213 are fixedly connected to the outer periphery of the central tube 211, and the other end is fixedly connected to the cavity wall of the cavity 12. The central tube 211 is rotatably connected to the mounting frame 2.

[0037] In this embodiment, the axis of the central tube 211 is aligned with the axis of the drum body 1, and its two ends form a rotational fit with the mounting frame 2, providing an axis for the rotation of the drum body 1. One end of the first support rod 212 and the second support rod 213 are fixed to the outer periphery of the central tube 211 (preferably welded), and the other end is fixed vertically or obliquely to the cavity wall of the cavity 12. The first support rod 212 and the second support rod 213 are distributed at a preset angle on the outer periphery of the central tube 211, and together with the central tube 211 and the cavity wall of the cavity 12, they form a stable triangular support structure. The cantilever structure 21 is completely built into the cavity 12 and does not exceed the radial range of the cavity 12. The triangular support structure itself has geometric stability, avoiding the problems of easy swaying and uneven force distribution of traditional single-rod supports, and extending the service life of the cantilever structure 21. Compared with external or near-inlet support structures, the built-in cantilever structure 21 reduces the probability of blockage and improves work efficiency.

[0038] The angle between the axis of the first support rod 212 and the axis of the second support rod 213 is 120°.

[0039] In this embodiment, the 120° angle ensures both support strength and provides ample space for soil flow within the cavity 12. After entering through the inlets 11 at both ends of the covering roller, the soil flows evenly along the gaps to the covering seams around the roller, preventing soil stagnation due to excessively small support rod angles and further reducing the risk of blockage. Furthermore, the applicant's research has found that the 120° angle maximizes the synergistic load-bearing capacity of the first support rod 212 and the second support rod 213, making the support structure less prone to deformation when handling heavy clay soils or encountering rock impacts, thus extending its service life. In other embodiments, the angle between the axes of the first support rod 212 and the second support rod 213 can also be 90°, 100°, or 150°, etc.

[0040] The mounting frame 2 includes a frame 22 located on both sides of the roller body 1, a connecting pipe 23 fixed to the frame 22, and a bearing seat 24 fixed to the connecting pipe 23. A connecting shaft 241 extending out of the bearing seat 24 and fixedly connected to the central pipe 211 is rotatably disposed inside the bearing seat 24.

[0041] In this embodiment, the frame 22 is symmetrically distributed on both axial sides of the drum body 1, serving as a fixed base for the mounting frame 2 and directly connected to the seeder body. The connecting pipe 23 is horizontally fixed between the two frames 22, and a bearing seat 24 is installed at one end of the connecting pipe 23 near the cantilever structure 21. The bearing seat 24 internally achieves rotational engagement with the connecting shaft 241 through a bearing. One end of the connecting shaft 241 extends out of the bearing seat 24, and the other end is fixedly connected to the central tube 211 of the cantilever structure 21 (e.g., by welding or bolting), allowing the central tube 211 to form a rotatable support with the bearing seat 24 via the connecting shaft 241, ultimately enabling the drum body 1 to rotate around the axis of the connecting shaft 241. Specifically, the seeder's transmission system (e.g., chain, belt) drives the connecting shaft 241 to rotate. Since the connecting shaft 241 is fixed to the central tube 211, the rotational force is directly transmitted to the cantilever structure 21, and then, through the first support rod 212 and the second support rod 213, drives the drum body 1 to rotate synchronously, completing the soil covering operation.

[0042] The central tube 211 is hollow, and the end of the connecting shaft 241 extends into the central tube 211. The connecting shaft 241 and the central tube 211 are fixed together by several set screws 26.

[0043] In this embodiment, the central tube 211 is constructed as a hollow structure to facilitate the installation of the connecting shaft 241. The end of the connecting shaft 241 extends into the hollow central tube 211, forming a nested shaft-tube fit. To ensure synchronous rotation and a stable connection, this embodiment uses several set screws 26 for fixing. The set screws 26 are screwed radially into the pre-set threaded holes on the central tube 211, and their ends press tightly against the outer circumference of the connecting shaft 241. Friction is used to limit the relative displacement between the connecting shaft 241 and the central tube 211, ensuring the reliability of power transmission and facilitating subsequent disassembly and adjustment. When maintenance or replacement of parts is required, the connecting shaft 241 and the central tube 211 can be separated by loosening the set screws 26, making the operation flexible and convenient.

[0044] The connecting tube 23 extends at least partially into the cavity 12.

[0045] In this embodiment, the connecting pipe 23 extends at least partially into the cavity 12 of the roller body 1, making the structure of the mounting bracket 2 more compact. This eliminates the need for excessive space outside the roller body 1 to install the connecting pipe 23, and also shortens the distance between the connecting pipe 23 and the central pipe 211 and bearing seat 24, allowing for more direct force transmission and reducing swaying. Furthermore, the partial insertion of the connecting pipe 23 into the cavity 12 prevents it from bumping against soil clods and root debris outside the roller body 1, reducing the risk of damage.

[0046] The connecting pipe 23 is connected to the bearing housing 24 via the arc plate 25.

[0047] In this embodiment, the connecting pipe 23 and the bearing seat 24 are connected by an arc plate 25. The transition of the arc plate 25 makes the connection between the connecting pipe 23 and the bearing seat 24 smoother, disperses the force at the connection point, and makes it less likely to break.

[0048] The roller body 1 has soil inlets 11 at both ends along its own axial direction, and the cantilever structure 21 is located in the middle area of ​​the roller body 1 along its own axial direction between the two soil inlets 11.

[0049] In this embodiment, soil inlets 11 are provided at both ends of the roller body 1, and the cantilever structure 21 is located between the two soil inlets 11, that is, in the middle area of ​​the roller body 1 along its own axis. Thus, the cantilever structure 21 will not block the soil inlets 11 at both ends of the roller body 1, allowing soil to enter smoothly from both ends of the roller body 1, reducing the possibility of blockage. At the same time, the cantilever structure 21 supporting the middle position of the roller body 1 also makes the rotation of the roller body 1 more stable.

[0050] Furthermore, this embodiment also provides a seeder, including a covering roller, which includes any of the aforementioned covering rollers. The reasoning process for the beneficial effects of the seeder provided in this embodiment and the aforementioned covering rollers is similar, and will not be repeated here.

[0051] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A soil-covering roller for a seeder, comprising a roller body and a mounting frame, wherein the roller body is disposed on the mounting frame, and the mounting frame is connected to the seeder, characterized in that, The mounting frame includes a cantilever structure that can rotate relative to the mounting frame. The roller body is fixedly connected to the cantilever structure and supported on the mounting frame by the cantilever structure. The roller body has a soil inlet, and the cantilever structure is located away from the soil inlet.

2. The soil-covering roller for a seeder according to claim 1, characterized in that, The roller body has a cavity along its own axial direction, the cavity is connected to the soil inlet, and the cantilever structure is fixed in the cavity.

3. The soil-covering roller for a seeder according to claim 2, characterized in that, The cantilever structure includes a central tube, a first support rod, and a second support rod; one end of the first support rod and the second support rod are fixedly connected to the outer periphery of the central tube, and the other end is fixedly connected to the cavity wall; the central tube is rotatably connected to the mounting frame.

4. The soil-covering roller for a seeder according to claim 3, characterized in that, The included angle between the axis of the first support rod and the axis of the second support rod is 120°.

5. The soil-covering roller for a seeder according to claim 3, characterized in that, The mounting frame includes a frame located on both sides of the roller body, a connecting pipe fixed to the frame, and a bearing seat fixed to the connecting pipe. A connecting shaft extending out of the bearing seat and fixedly connected to the central pipe is rotatably disposed inside the bearing seat.

6. The soil-covering roller for a seeder according to claim 5, characterized in that, The central tube is hollow, and the end of the connecting shaft extends into the central tube. The connecting shaft and the central tube are fixed together by several set screws.

7. The soil-covering roller for a seeder according to claim 5, characterized in that, The connecting tube extends at least partially into the cavity.

8. The soil-covering roller for a seeder according to claim 5, characterized in that, The connecting pipe is connected to the bearing seat via an arc plate.

9. The seeder covering roller according to any one of claims 1-8, characterized in that, The roller body has soil inlets at both ends along its own axial direction, and the cantilever structure is located in the middle region of the roller body along its own axial direction between the two soil inlets.

10. A seeder, characterized in that, Includes a soil covering roller, wherein the soil covering roller comprises the soil covering roller according to any one of claims 1 to 9.

Images