Contouring seeding apparatus for precision seeding

Abstract

The present application relates to the technical field of agricultural machinery equipment, in particular to a profiling seeding device for precision seeding. The frame of the profiling seeding device for precision seeding is configured to be connected to a power traction device; a soil covering and pressing component is installed on the frame and configured to roll and press the surface of the field along with the movement of the power traction device; a hill-drop seeder is installed on the frame through a profiling seeding mechanism and located behind the soil covering and pressing component, and configured to make a circular motion along with the movement of the power traction device and to seed on a seeding belt; the profiling seeding mechanism is configured to form an arc-shaped profiling of the hill-drop seeder along with the undulation of the field, and the rotating shaft of the hill-drop seeder is adapted to the undulation of the field to make a profiling floating in the height direction of the frame along an arc-shaped track. The profiling seeding device for precision seeding realizes the arc-shaped profiling motion of the seeder, ensures the consistency of the seeding depth and the quality of the hill formation, and further improves the seeding quality and the operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and equipment technology, specifically to a contour-following seeding device for precision seeding. Background Technology

[0002] Precision seeding refers to a method of sowing seeds into the soil according to precise quantity, spacing, and depth. It primarily utilizes a precision seed metering device as the core component of the seeder to ensure consistent sowing depth, thereby guaranteeing uniform seed emergence and germination times, ultimately ensuring crop yield and quality. However, uneven soil surfaces and machine vibrations can affect the effectiveness of precision seeding. If the sowing depth is not consistent, it can lead to inconsistent seed emergence and germination times, resulting in differences in water and nutrient absorption among plants, as well as variations in light exposure. In severe cases, delayed seedling emergence, poor seed growth, or even failure to germinate can occur, ultimately impacting cotton yield and quality.

[0003] Currently, in precision seeding operations, existing technologies use contouring mechanisms to adjust the height of the implements, thereby achieving consistent seeding depth. For example, contouring mechanisms can be categorized into active and passive contouring based on their contouring methods. Passive contouring primarily relies on mechanical linkages or springs for passive adjustment; the contouring stroke is determined by altering the linkage's hinge position and the spring's elasticity.

[0004] Active contouring builds upon passive contouring by combining mechanical sensing with hydraulic control. Sensing technology detects changes in ground elevation and transmits these changes to the hydraulic system, which then controls the extension and retraction of hydraulic cylinders within a specified timeframe to achieve the contouring effect. However, active contouring is more complex and costly than passive contouring, and its reliability is difficult to guarantee under harsh field conditions.

[0005] A search revealed a contour-following seeder in Chinese patent document CN114430966A. This contour-following seeder has a contour-following frame detachably connected to a third beam; and a seeder connected to the contour-following frame, which is rotatable relative to the frame, allowing for adjustments to the contour-following direction based on ground contours and undulations, thereby improving the contour-following effect.

[0006] The aforementioned contouring frame has a multi-link structure, which often only achieves linear contouring and floating in actual use. Especially during mechanical hill sowing, the hill sower makes a full circle and moves forward with the machine. Linear contouring will greatly affect the sowing quality, resulting in sowing depth and hill formation effect. It may even cause seeds to be exposed on the film, thus affecting the sowing quality and film laying quality, and greatly reducing the work efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a contour-following seeding mechanism for precision seeding operations, which adapts to the undulations of the land on the seeding strip, realizes the arc-shaped contour movement of the seeder, ensures the consistency of seeding depth and the quality of hole formation, and thus improves seeding quality and operational efficiency.

[0008] To achieve the above objectives, the present invention proposes a contour-following seeding device for precision seeding, comprising a frame, a soil covering and compaction component, a seeder, and a contour-following seeding mechanism; The frame is configured to connect to a power traction device and, with the movement of the power traction device, drive the contour seeding device to operate in the field. The soil covering and compaction component is mounted on the frame and is configured to roll and compact the surface of the field as the power traction equipment moves, forming a seeding strip on the field surface; The seeder is mounted on the frame via a contour seeding mechanism and is located behind the soil covering and compaction components. The seeder is configured to move in a circular motion with the movement of the power traction equipment and to sow seeds onto the seeding belt. The contour-following seeding mechanism is used to load the seeder onto the frame. The contour-following seeding mechanism is configured to form an arc shape for the seeder according to the undulations of the field, and guide the rotating shaft of the seeder to adapt to the undulations of the field and float in the height direction of the frame along the arc trajectory.

[0009] In particular, the undulating terrain of fields is often not a simple straight line, but rather presents an irregular curved shape. Arc-shaped contouring better adapts to complex terrain. When encountering small mounds, shallow depressions, or other similar terrain features, the position of the seeder can be adjusted along the arc trajectory, always maintaining a suitable distance and angle from the terrain surface. In contrast, straight-line contouring can only be adjusted in one direction, making it difficult to adapt to the curved changes in terrain. This can lead to abnormal distances between the seeder and the ground in areas with significant terrain undulations, affecting the sowing effect.

[0010] During the arc-shaped contouring process, the seeder's movement trajectory is relatively smooth, its center of gravity changes relatively steadily, and the overall stability of the equipment is better, reducing swaying and bumping caused by the contouring motion. In contrast, the linear contouring floating is prone to generating greater impact forces when encountering sudden changes in terrain, causing the seeder to shake, which may result in offset sowing positions or inconsistent sowing depths, affecting sowing quality.

[0011] Preferably, the contour-following seeding mechanism includes a connecting component, a mounting frame, and a multi-stage scissor mechanism. The mounting frame is connected to the machine frame via the connecting component. The mounting frame is provided with a contour-following channel for the rotating shaft of the seeder to follow an arc shape. The inner wall of the contour-following channel is provided with an arc-shaped guide groove for embedding the rotating shaft. A pair of multi-stage scissor mechanisms are arranged along the arc-shaped guide groove in the contour-following channel. The rotating shaft is located between the pair of multi-stage scissor mechanisms. One end of the multi-stage scissor mechanism is fixed to the mounting frame, and the other end of the multi-stage scissor mechanism is connected to the rotating shaft via a sleeve.

[0012] Preferably, the multi-stage scissor mechanism is equipped with a radial elastic contraction device, which is located at the hinge of the multi-stage scissor mechanism. Adjacent radial elastic contraction devices squeeze each other to buffer the arc-shaped conformation of the seeder.

[0013] As a preferred option, the multi-stage scissor lift mechanism adopts a variable-length linkage structure.

[0014] Preferably, the radial elastic contraction device includes a connecting shaft, an annular baffle, and a compression spring. The connecting shaft is installed at the hinge of the multi-stage scissor mechanism, and the annular baffle is connected to the side wall of the connecting shaft through the compression spring. Multiple annular baffles are arranged in a circle along the axis of the connecting shaft.

[0015] Preferably, the connecting assembly includes a first connecting beam, a second connecting beam, and a locking mechanism. The first connecting beam is mounted on the frame, the second connecting beam is hinged to the first connecting beam, the second connecting beam has a degree of rotational freedom, the mounting frame is connected to the second connecting beam, and the locking mechanism is configured to lock the rotation of the second connecting beam, thereby changing the distance between the seeder and the field by locking the rotational position of the second connecting beam.

[0016] Preferably, the locking mechanism includes a first ear seat, a second ear seat, and a pin. The first ear seat is mounted on the first connecting beam, and the second ear seat is mounted on the second connecting beam. The first ear seat has a mounting hole for mounting the pin, and the second ear seat has a limit hole.

[0017] Preferably, an adjustment structure is provided between the mounting bracket and the connecting assembly. The adjustment structure is configured to apply a preload to the multi-stage scissor mechanism within the contoured channel, thereby adjusting the initial position of the multi-stage scissor mechanism.

[0018] Preferably, the adjustment structure includes an adjustment screw, a preload spring, and an arc-shaped plate for contacting the multi-stage scissor mechanism. The adjustment screw is threaded onto the connecting assembly, the arc-shaped plate is connected to the end of the adjustment screw, the preload spring is disposed between the arc-shaped plate and the connecting assembly, and the preload spring is sleeved on the adjustment screw.

[0019] Preferably, the soil compaction component includes a roller, a guide frame, and soil covering discs. The roller is mounted on the frame via the guide frame, and the soil covering discs are arranged at the ends of the roller.

[0020] The contour-following seeding device for precision seeding provided by this invention has the following outstanding substantive features and significant progress compared with the prior art: 1. This contour-following seeding device for precision seeding can conform to the undulations of the field, forming an arc shape for the seeder. The seeder's rotating shaft adapts to the field's contours, floating along an arc-shaped trajectory along the height of the frame. This allows the device to maintain a suitable sowing depth and position even on complex, uneven terrain, significantly improving its adaptability to different terrains and ensuring sowing quality. The contour-following mechanism can adjust the seeder's height in real time according to the terrain's undulations. Regardless of the field surface's surface, the seeder can sow at a relatively stable height, avoiding over- or under-sowing due to terrain variations. This ensures uniform seed depth in the soil, which is crucial for seed germination, growth, and the uniformity of the crop, ultimately improving overall crop yield and quality.

[0021] 2. This contour-following seeding device for precision seeding forms a seeding zone on the field surface through a soil-covering and compacting component. This provides a relatively flat and compact base for subsequent hill-seeding, which helps the seeds to better contact the soil and absorb water and nutrients. The cooperation between the soil-covering and compacting component and the contour-following seeding mechanism creates favorable conditions for precise hill-seeding. The contour-following seeding mechanism ensures the stability and accurate positioning of the hill-seeder under different terrains. Combined with the hill-seeder's own seeding function, it can more accurately control the seeding position and quantity, achieve precision seeding, effectively avoid seed waste, and improve seed utilization.

[0022] 3. This contour-following seeding device for precision seeding uses a contour-following seeding mechanism to create an arc-shaped contour movement for the seeder. This makes the force on each component of the seeder more uniform during the contour-following process, and the force transmission and distribution are more reasonable. It reduces the situation of excessive local stress on components. In complex terrain, the arc-shaped contour-following can ensure that the seeder can complete the seeding operation continuously and stably. In the process of following the undulations of the terrain, there will be no interruption or discontinuity in seeding due to the limitation of the contour-following method, which ensures the continuity of seeding and thus improves the uniformity of seed distribution. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a contour-following seeding device for precision seeding according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A front view of a contour seeding device used for precision seeding.

[0025] Figure 3This is a schematic diagram of the internal structure of the contour-following seeding mechanism in an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the assembly structure of the multi-stage scissor lift mechanism and the mounting frame in an embodiment of the present invention.

[0027] Figure 5 yes Figure 4 The main view.

[0028] Figure 6 This is a three-dimensional structural schematic diagram of the radial elastic contraction device in an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the assembly structure of the connecting components in an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the internal structure of the locking mechanism in an embodiment of the present invention.

[0031] Reference numerals: 1. Frame; 2. Soil covering and compaction component; 3. Seeder; 4. Contour-following seeding mechanism; 5. Rotating shaft; 6. Adjustment structure; 21. Roller; 22. Guide frame; 23. Soil covering disc; 41. Connecting assembly; 42. Mounting frame; 43. Multi-stage scissor mechanism; 44. Arc-shaped guide groove; 45. Radial elastic contraction device; 46. Contour-following channel; 47. Sleeve; 61. Adjusting screw; 62. Preload spring; 63. Arc-shaped plate; 411. First connecting beam; 412. Second connecting beam; 413. Locking mechanism; 414. First ear seat; 415. Second ear seat; 416. Locking tongue; 417. Locking spring; 418. Pin; 451. Connecting shaft; 452. Annular baffle; 453. Compression spring. Detailed Implementation

[0032] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] During precision seeding operations, field terrain undulations are often not simple linear changes, but rather exhibit irregular curved shapes. Existing linear contour-following floaters can only be adjusted in a single direction, making it difficult to adapt to the curved changes in terrain. This may result in abnormal distances between the seeder and the ground in areas with significant terrain undulations, affecting seeding efficiency. Figures 1-8 As shown in the embodiment of the present invention, a contour-following seeding device for precision seeding is proposed, which aims to adapt to the undulations of the land on the seeding strip, realize the arc contour-following movement of the seeder, ensure the consistency of seeding depth and the quality of hole formation, and thus improve seeding quality and work efficiency.

[0034] The contour-following sowing device proposed in this embodiment of the invention can conform to the undulations of the field and form an arc shape for the seeder. The rotating shaft of the seeder adapts to the undulations of the field and floats along the arc trajectory in the height direction of the frame, so that the device can always maintain a suitable sowing depth and position on fields with complex and uneven terrain. This greatly improves the adaptability of the device to different terrains and ensures sowing quality. The contour-following sowing mechanism can adjust the height of the seeder in real time according to the undulations of the terrain. No matter how the field surface is uneven, the seeder can sow at a relatively stable height, avoiding the problem of sowing too deep or too shallow due to terrain undulations. This ensures that the seeds are at a uniform depth in the soil, which is crucial for seed germination, growth and the uniformity of the crop in the later stage, and is conducive to improving the overall yield and quality of the crop.

[0035] like Figure 1 Combination Figure 2 As shown, a contour-following seeding device for precision seeding includes a frame 1, a soil covering and compaction component 2, a seeder 3, and a contour-following seeding mechanism 4. The frame 1 is configured to connect to a power traction device, and the contour-following seeding device is driven to operate in the field as the power traction device moves.

[0036] like Figure 1 As shown, the soil compaction component 2 is mounted on the frame 1. The soil compaction component 2 is configured to roll and compact the surface of the field as the power traction equipment moves, forming a seeding strip on the field surface.

[0037] like Figure 2 As shown, the hill-seeder 3 is mounted on the frame 1 via a contour-following seeding mechanism 4 and is located behind the soil covering and compaction component 2. The hill-seeder 3 is configured to move in a circular motion with the movement of the power traction device and sow seeds onto the seeding belt.

[0038] The contour-following seeding mechanism 4 is used to mount the seeder 3 on the frame 1. The contour-following seeding mechanism 4 is configured to form an arc-shaped contour for the seeder 3 according to the undulation of the field, and guide the rotating shaft 5 of the seeder 3 to adapt to the undulation of the field and float in the height direction of the frame 1 along the arc-shaped trajectory.

[0039] The contour-following seeding device for precision seeding forms a seeding zone on the field surface through the soil covering and compaction component 2, providing a relatively flat and compact foundation for subsequent seeding by the hill seeder 3. This helps the seeds to make better contact with the soil, which is beneficial for the seeds to absorb water and nutrients. The cooperation between the soil covering and compaction component 2 and the contour-following seeding mechanism 4 creates favorable conditions for precise seeding by the hill seeder 3. The contour-following seeding mechanism 4 ensures the stability and precise positioning of the hill seeder 3 under different terrains. Combined with the seeding function of the hill seeder 3 itself, it can more accurately control the position and quantity of seeding, achieve precision seeding, effectively avoid seed waste, and improve seed utilization.

[0040] Furthermore, the arc-shaped motion of the seeder 3, achieved by the contour-following sowing mechanism 4, ensures that the forces on each component of the seeder 3 are more uniform during the contour-following process, and that the force transmission and distribution are more reasonable. This reduces the possibility of excessive local stress on components. In complex terrain, the arc-shaped contour-following mechanism ensures that the seeder 3 can complete the sowing operation continuously and stably. As it follows the undulations of the terrain, there will be no interruption or discontinuity in sowing due to limitations in the contour-following method, thus ensuring the continuity of sowing and improving the uniformity of seed distribution.

[0041] like Figure 1 As shown, the soil covering and compaction component 2 includes a roller 21, a guide frame 22, and soil covering discs 23. The roller 21 is mounted on the frame 1 via the guide frame 22, and the soil covering discs 23 are arranged at the ends of the roller 21. The roller 21, mounted on the frame 1 via the guide frame 22, rolls under the drive of a power traction device, enabling it to compact the field surface over a large area and evenly. Its large contact area effectively compacts the soil, breaks up clods, and makes the field surface smoother, creating favorable conditions for subsequent sowing. Smooth land facilitates full contact between seeds and soil, improving seed germination rates, and also facilitates subsequent field management and mechanized operations.

[0042] like Figure 2 Combination Figure 3 As shown, the contour-following seeding mechanism 4 includes a connecting assembly 41, a mounting frame 42, and a multi-stage scissor mechanism 43. The mounting frame 42 is connected to the frame 1 via the connecting assembly 41. A contour-following channel 46 is provided within the mounting frame 42 for the rotating shaft 5 of the seeder 3 to follow an arc shape. An arc-shaped guide groove 44 for embedding the rotating shaft 5 is provided on the inner wall of the contour-following channel 46. A pair of multi-stage scissor mechanisms 43 are arranged along the arc-shaped guide groove 44 within the contour-following channel 46. The rotating shaft 5 is located between the pair of multi-stage scissor mechanisms 43. One end of each multi-stage scissor mechanism 43 is fixed to the mounting frame 42. The other end of each multi-stage scissor mechanism 43 is connected to the rotating shaft 5 via a sleeve 47.

[0043] like Figure 3 As shown, the contouring channel 46 and its inner arc-shaped guide groove 44 within the mounting frame 42 provide precise arc-shaped motion trajectory guidance for the rotating shaft 5 of the seeder 3. This allows the seeder 3 to float strictly according to the preset arc-shaped trajectory during the contouring process, accurately adapting to the undulations of the field. Compared to contouring mechanisms without a specific guiding structure, the design of the contouring channel 46 and the arc-shaped guide groove 44 greatly improves the accuracy of contouring, further ensuring the consistency of sowing depth and position, thereby improving sowing quality.

[0044] like Figure 4As shown, the multi-stage scissor lift mechanism 43 not only provides support but also flexibly adapts to terrain changes through its extension and retraction during contour-following motion. One end of the multi-stage scissor lift mechanism 43 is fixed to the mounting bracket 42, and the other end is connected to the rotating shaft 5 via a sleeve 47. This connection method allows the multi-stage scissor lift mechanism 43 to flexibly adjust its extension degree according to terrain undulations, thereby driving the rotating shaft 5 to perform contour-following motion along the arc-shaped guide groove 44. The multi-stage design of the multi-stage scissor lift mechanism 43 increases its flexibility and range of extension and retraction, enabling it to adapt more precisely and accurately to different degrees of terrain undulations, thus improving the equipment's adaptability to complex terrain.

[0045] like Figure 5 As shown, the symmetrical arrangement of the two scissor mechanisms makes the force on the rotating shaft 5 more uniform during the contouring process, avoiding swaying or deviation caused by uneven force, enhancing the stability of the entire contouring seeding mechanism 4 when operating in complex terrain, and ensuring the continuous and stable operation of the seeding operation.

[0046] like Figure 4 As shown, a radial elastic contraction device 45 is provided on the multi-stage scissor mechanism 43. The radial elastic contraction device 45 is arranged at the hinge of the multi-stage scissor mechanism 43. Adjacent radial elastic contraction devices 45 squeeze each other to buffer the arc-shaped conformation of the seeder 3. During field operations, changes in terrain undulations may cause the seeder 3 to be subjected to a large impact force instantaneously. The radial elastic contraction device 45 is arranged at the hinge of the multi-stage scissor mechanism 43, and adjacent devices squeeze each other, which can timely buffer the impact force caused by sudden changes in terrain during the arc-shaped conformation of the seeder 3.

[0047] For example, when encountering raised or sunken terrain, the elastic contraction device absorbs some of the energy through its own deformation, preventing the impact force from being directly transmitted to the seeder 3, thereby ensuring the stable operation of the seeder 3, reducing the displacement of the seeding position or the change in the seeding depth caused by the impact, and further improving the seeding quality.

[0048] During the arc-shaped contouring process, the radial elastic contraction device 45 enables the multi-stage scissor mechanism 43 to move more smoothly. Due to its elastic buffering characteristics, when the multi-stage scissor mechanism 43 extends or retracts, it can effectively avoid movement jamming or discontinuity caused by sudden changes in terrain, so that the seeder 3 maintains a stable working state throughout the seeding process, ensuring the continuity and uniformity of seeding.

[0049] When the terrain changes gently, the elastic contraction device is in a relatively relaxed state, having little impact on the contour-following motion; however, when the terrain is undulating, the adjacent radial elastic contraction devices 45 compress against each other more, providing stronger buffering force. In this way, the contour-following seeding mechanism 4 can better adapt to different terrain conditions, ensuring good contour-following effect and seeding performance in both relatively flat and complex and rugged fields.

[0050] like Figure 6 As shown, the radial elastic contraction device 45 includes a connecting shaft 451, an annular baffle 452, and a compression spring 453. The connecting shaft 451 is mounted at the hinge of the multi-stage scissor mechanism 43. The annular baffle 452 is connected to the side wall of the connecting shaft 451 via the compression spring 453. Multiple annular baffles 452 are arranged in a circle along the axis of the connecting shaft 451. When subjected to impacts from terrain undulations, the compression spring 453 can precisely extend and retract according to the magnitude of the force, and the annular baffle 452 moves accordingly, thereby precisely controlling the buffering force. This allows the seeder 3 to maintain optimal working condition under various complex terrains, further improving the accuracy of seeding.

[0051] Multiple annular baffles 452 are arranged in a circular pattern along the axis of the connecting shaft 451, enabling the radial elastic contraction device 45 to provide all-around buffer protection. In actual operation, terrain impacts from different directions can be effectively dispersed and absorbed. Regardless of whether the impact is applied from the horizontal, vertical, or other angles, the structure composed of the annular baffles 452 and the compression springs 453 can respond promptly, providing comprehensive protection for the multi-stage scissor lift mechanism 43 and the seeder 3.

[0052] According to some preferred embodiments of the present invention, the multi-stage scissor mechanism 43 adopts a variable-length linkage structure. During the contouring process, the variable-length linkage can adjust its movement posture in real time according to the terrain, making the arc contouring of the seeder 3 smoother and more natural, reducing sowing errors caused by inaccurate contouring, and helping to further optimize the contouring motion curve, thereby improving the uniformity and consistency of sowing and creating more favorable conditions for crop growth.

[0053] Furthermore, when facing complex terrain, the variable-length linkage structure can better distribute and withstand forces from different directions by rationally adjusting its shape. This not only enhances the stability of the equipment during operation but also improves its reliability, reduces the probability of failure, and extends the equipment's service life.

[0054] In addition, the variable-length linkage structure enables the multi-stage scissor mechanism 43 to respond to contours more quickly. During rapid movement, it can quickly adjust its shape according to changes in terrain, ensuring that the seeder 3 adapts to terrain undulations in a timely manner and performs seeding operations without interruption. This effectively reduces the time spent on seeding interruptions or adjustments due to terrain changes, improves seeding efficiency, and helps complete large-area seeding tasks in a shorter time.

[0055] like Figure 7 As shown, the connecting assembly 41 includes a first connecting beam 411, a second connecting beam 412, and a locking mechanism 413. The first connecting beam 411 is mounted on the frame 1. The second connecting beam 412 is hinged to the first connecting beam 411. The second connecting beam 412 has rotational freedom. The mounting bracket 42 is connected to the second connecting beam 412. The locking mechanism 413 is configured to lock the rotation of the second connecting beam 412, and by locking the rotational position of the second connecting beam 412, the distance between the seeder 3 and the field is changed.

[0056] This structural design of the connecting component 41 makes the equipment commissioning process more convenient. When using the equipment for the first time or changing the work area, operators can quickly adjust the second connecting beam 412 using the locking mechanism 413 to find the most suitable height for the seeder 3 under the current working conditions. Simultaneously, during equipment maintenance, if it is necessary to inspect the mounting frame 42 or the seeder 3, the position of the mounting frame 42 can be easily adjusted by unlocking the locking mechanism 413 and rotating the second connecting beam 412, providing maintenance personnel with better operating space, reducing the difficulty of equipment commissioning and maintenance, minimizing downtime, and improving equipment utilization efficiency.

[0057] like Figure 7 Combination Figure 8 As shown, for example, the locking mechanism 413 includes a first ear seat 414, a second ear seat 415, and a pin 418. The first ear seat 414 is mounted on the first connecting beam 411. The second ear seat 415 is mounted on the second connecting beam 412. The first ear seat 414 has a mounting hole for mounting the pin 418. The second ear seat 415 has a limiting hole. The end of the pin 418 is provided with a locking tongue 416. The locking tongue 416 is used to engage with the limiting hole to lock the second connecting beam 412 in position. A locking spring 417 is sleeved on the locking tongue 416. The locking spring 417 provides axial return force to the locking tongue 416.

[0058] According to some preferred embodiments of the present invention, such as Figure 3 As shown, an adjustment structure 6 is provided between the mounting bracket 42 and the connecting assembly 41. The adjustment structure 6 is configured to apply a preload to the multi-stage scissor mechanism 43 within the contour channel 46, thereby adjusting the initial position of the multi-stage scissor mechanism 43.

[0059] By applying preload to the multi-stage scissor mechanism 43 through adjusting structure 6, its initial position can be effectively optimized. This allows the multi-stage scissor mechanism 43 to make more rapid and sensitive contour-following movements when facing terrain undulations. The preload provides the mechanism with a certain initial tension, enabling it to respond and adjust quickly when affected by minor terrain changes, avoiding contour-following delays caused by mechanism slack, ensuring that the seeder 3 adapts to terrain changes in a timely manner, and further improving the accuracy and continuity of seeding.

[0060] Different field conditions and sowing requirements may necessitate that the multi-stage scissor mechanism 43 operate in different initial states. The adjustment structure 6 can flexibly adjust the preload and initial position of the multi-stage scissor mechanism 43 according to actual operating conditions. For example, in fields with relatively flat terrain but varying soil textures, the preload can be adjusted to allow the multi-stage scissor mechanism 43 to adapt to the impact of soil hardness changes on sowing depth with varying sensitivities. In areas with complex mountainous terrain and significant topographic relief, the preload can be increased to ensure that the mechanism can more stably cope with large terrain changes, thereby meeting the diverse needs of agricultural sowing operations.

[0061] For example, such as Figure 3 As shown, the adjusting structure 6 includes an adjusting screw 61, a preload spring 62, and an arc-shaped plate 63 for contacting the multi-stage scissor lift mechanism 43. The adjusting screw 61 is threaded onto the connecting assembly 41. The arc-shaped plate 63 is connected to the end of the adjusting screw 61. The preload spring 62 is positioned between the arc-shaped plate 63 and the connecting assembly 41, and is sleeved on the adjusting screw 61.

[0062] In this embodiment of the invention, a contour-following seeding device for precision seeding is proposed. The frame 1 is connected to a power traction device to ensure a stable connection. The power traction device can be a tractor or similar device, providing power for the entire contour-following seeding device to operate in the field. The first connecting beam 411 of the connecting assembly 41 is mounted on the frame 1, and the second connecting beam 412 is hinged to the first connecting beam 411. At this time, the rotational position of the second connecting beam 412 can be adjusted via the locking mechanism 413 according to the field conditions and seed characteristics, thereby changing the distance between the seeder 3 and the field, and completing the initial setting of the seeding height.

[0063] Subsequently, the adjustment structure 6 is used to apply a preload to the multi-stage scissor mechanism 43 within the contouring channel 46 and adjust its initial position. Rotating the adjustment screw 61, which is threaded onto the connecting assembly 41, moves the arc-shaped plate 63 connected to the end of the screw. The arc-shaped plate 63 then fits against the multi-stage scissor mechanism 43, compressing or extending the preload spring 62, which is sleeved on the adjustment screw 61 and located between the arc-shaped plate 63 and the connecting assembly 41. This achieves precise adjustment of the preload of the multi-stage scissor mechanism 43, preparing it for subsequent contouring movements.

[0064] Start the power traction equipment to drive the contour seeding equipment forward in the field. The soil covering and compaction component 2 installed on the frame 1 starts to work. As the power traction equipment moves, the soil covering and compaction component 2 rolls and compacts the field surface, forming a seeding zone on the field surface, creating good basic conditions for subsequent sowing.

[0065] The seeder 3, located behind the soil covering and compaction component 2, is mounted on the frame 1 via a contour-following seeding mechanism 4. Driven by a power traction device, the seeder 3 moves in a circular motion as the equipment advances, sowing seeds onto the seeding belt. During this process, if the field becomes undulating, the contour-following seeding mechanism 4 comes into play. The multi-stage scissor mechanism 43 adopts a variable-length linkage structure, which can flexibly adjust its extension and retraction states according to changes in terrain. At the same time, the contour-following channel 46 and its inner wall's arc-shaped guide groove 44, provided within the mounting frame 42, provide precise arc-shaped movement trajectory guidance for the seeder 3's rotating shaft 5. The multi-stage scissor mechanism 43 moves along the arc-shaped guide groove 44, with one end fixed to the mounting frame 42 and the other end connected to the rotating shaft 5 via a sleeve 47, allowing the rotating shaft 5 to float contour-following along the arc-shaped trajectory in the height direction of the frame 1, ensuring that the seeder 3 always adapts to terrain undulations and maintains a suitable sowing depth and position. The radial elastic contraction device 45 installed on the multi-stage scissor mechanism 43 buffers the impact force caused by terrain undulations on the connecting shaft 451 at the hinge through an annular baffle 452 and a compression spring 453, ensuring the smoothness and stability of the contouring motion.

[0066] During the sowing process, the operator can fine-tune the locking mechanism 413 of the connecting component 41 according to the actual sowing situation to further precisely control the distance between the seeder 3 and the field, ensuring that the sowing depth meets the requirements. If the contouring effect is not ideal, the preload and initial position of the multi-stage scissor mechanism 43 can be readjusted by adjusting the adjusting screw 61 of the structure 6 to optimize the contouring effect and ensure sowing quality.

[0067] This invention is not limited to the specific technical solutions described in the above embodiments. Besides the above embodiments, this invention may have other implementation methods. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A contouring seeding apparatus for precision seeding, characterized in that, Includes frame, soil covering and compaction components, seeder, and contour seeding mechanism; The frame is configured to connect to a power traction device and, with the movement of the power traction device, drive the contour seeding device to operate in the field. The soil covering and compaction component is mounted on the frame and is configured to roll and compact the surface of the field as the power traction equipment moves, forming a seeding strip on the field surface; The seeder is mounted on the frame via a contour seeding mechanism and is located behind the soil covering and compaction components. The seeder is configured to move in a circular motion with the movement of the power traction equipment and to sow seeds onto the seeding belt. The contour-following seeding mechanism is used to load the seeder onto the frame. The contour-following seeding mechanism is configured to form an arc-shaped contour for the seeder according to the undulations of the field, and guide the rotating shaft of the seeder to adapt to the undulations of the field and float in the height direction of the frame along the arc-shaped trajectory. The contour-following seeding mechanism includes a connecting component, a mounting frame, and a multi-stage scissor mechanism. The mounting frame is connected to the machine frame via the connecting component. The mounting frame has a contour-following channel for the rotating shaft of the seeder to follow an arc shape. The inner wall of the contour-following channel has an arc-shaped guide groove for embedding the rotating shaft. A pair of multi-stage scissor mechanisms are arranged along the arc-shaped guide groove in the contour-following channel. The rotating shaft is located between the pair of multi-stage scissor mechanisms. One end of each multi-stage scissor mechanism is fixed to the mounting frame, and the other end of each multi-stage scissor mechanism is connected to the rotating shaft via a sleeve.

2. Profiling seeding device for precision seeding according to claim 1, characterized in that, The multi-stage scissor mechanism is equipped with a radial elastic contraction device, which is located at the hinge of the multi-stage scissor mechanism. Adjacent radial elastic contraction devices squeeze each other to buffer the arc-shaped conformation of the seeder.

3. The contour-following seeding device for precision seeding according to claim 2, characterized in that, The multi-stage scissor lift mechanism adopts a variable-length linkage structure.

4. The contour-following seeding device for precision seeding according to claim 2, characterized in that, The radial elastic contraction device includes a connecting shaft, an annular baffle, and a compression spring. The connecting shaft is installed at the hinge of the multi-stage scissor mechanism. The annular baffle is connected to the side wall of the connecting shaft through the compression spring. Multiple annular baffles are arranged in a circle along the axis of the connecting shaft.

5. The contour-following seeding device for precision seeding according to claim 1, characterized in that, The connecting assembly includes a first connecting beam, a second connecting beam, and a locking mechanism. The first connecting beam is mounted on the frame, and the second connecting beam is hinged to the first connecting beam. The second connecting beam has a degree of rotational freedom. The mounting frame is connected to the second connecting beam. The locking mechanism is configured to lock the rotation of the second connecting beam and thereby change the distance between the seeder and the field by locking the rotational position of the second connecting beam.

6. The contour-following seeding device for precision seeding according to claim 5, characterized in that, The locking mechanism includes a first ear seat, a second ear seat, and a pin. The first ear seat is mounted on a first connecting beam, and the second ear seat is mounted on a second connecting beam. The first ear seat has a mounting hole for mounting the pin, and the second ear seat has a limit hole.

7. The contour-following seeding device for precision seeding according to claim 1, characterized in that, An adjustment structure is provided between the mounting bracket and the connecting assembly. The adjustment structure is configured to apply a preload to the multi-stage scissor mechanism within the contour channel, thereby adjusting the initial position of the multi-stage scissor mechanism.

8. The contour-following seeding device for precision seeding according to claim 7, characterized in that, The adjustment structure includes an adjustment screw, a preload spring, and an arc-shaped plate for contacting the multi-stage scissor mechanism. The adjustment screw is threaded onto the connecting assembly. The arc-shaped plate is connected to the end of the adjustment screw. The preload spring is positioned between the arc-shaped plate and the connecting assembly and is sleeved on the adjustment screw.

9. The contour-following seeding device for precision seeding according to claim 1, characterized in that, The soil compaction component includes a roller, a guide frame, and soil covering discs. The roller is mounted on the frame via the guide frame, and the soil covering discs are arranged at the ends of the roller.

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