A composite rotary tillage seeder

Abstract

The present invention provides a composite rotary tillage seeder, which relates to the technical field of sowing equipment, and includes a rotary tillage assembly, a ridging assembly, and a pressing wheel sequentially mounted on a frame, wherein a travel wheel is rotatably connected to one side of the pressing wheel on the frame, a one-way bearing is mounted between the travel wheel and the pressing wheel, the central axis of the pressing wheel is connected to the inner ring of the one-way bearing, and the rotating shaft of the travel wheel is connected to the outer ring of the one-way bearing; a mud scraper wheel is rotatably connected to the frame above the pressing wheel, the mud scraper wheel is transmission-connected to the travel wheel, and a plurality of mud scrapers are provided at intervals along the circumference of the mud scraper wheel. The mud scraper of the present invention can scrape off the mud adhering to the pressing wheel, which is conducive to reducing the slippage of the pressing wheel. When the pressing wheel slips due to the mud and its rotation speed is lower than the speed at which the travel wheel drives the outer ring of the one-way bearing to rotate, the travel wheel can drive the pressing wheel to continue rotating through the one-way bearing, which is conducive to reducing the influence of the pressing wheel slipping on the suppression effect.

Description

Technical Field

[0001] The present invention relates to the technical field of sowing equipment, in particular to a compound rotary tillage seeder. Background Art

[0002] A seeder is an agricultural machine used to evenly plant seeds into the soil at a defined row and plant spacing and depth. Before sowing, the soil must be tilled and ridged to create optimal conditions for seeding, crop growth, and field management. A combined seeder is a machine that utilizes a seeder as its primary component and is equipped with other components or implements to simultaneously perform multiple operations. This reduces the number of field operations, shortens the agronomic cycle, and reduces soil compaction.

[0003] A combined rotary tiller / seeder is an agricultural machine that combines tillage and seeding functions, completing multiple operations simultaneously: tilling, ridging, sowing, and compacting the soil. Typically towed by a tractor, a combined rotary tiller / seeder utilizes a power output shaft to drive the rotary blades, completing the tilling and soil crushing process. Simultaneously, the seeding mechanism evenly deposits seeds into the soil at a preset depth and spacing, while the compacting wheel compacts the soil, ensuring close contact between the seeds and the soil and promoting germination.

[0004] For example, patent document CN221829415U discloses a suspended rotary tillage, ridging, sowing, and fertilizing all-in-one machine. The device includes a frame and a rotary tillage assembly, a ridging assembly, a sowing assembly, and a flattening assembly mounted on the frame. The frame is suspended behind a vehicle. The vehicle moves forward, and the rotary tillage assembly is activated. The rotary tillage assembly begins to till the soil, while simultaneously driving the ridging assembly to form ridges on both sides. The transmission assembly drives the sowing assembly to sow seeds. A furrowing disc furrows the soil into which the fertilizer has been screwed. After furrowing, the seeds fall into the furrow along the disc. Finally, a pressing wheel passes over the furrow to compact the seeds within.

[0005] For example, patent publication number CN117616926B discloses a precision seeder for pinellia. The seeder is connected to a tractor via a suspension rod. The tractor's output shaft connects to a coupling on a rotary tillage mechanism. The tractor transmits power to the mechanism's gearbox via the coupling, causing the rotary blades to rotate. Ridges are then formed on the tilled soil using a ridging plate. A furrow opener creates evenly spaced furrows on the ridges. A seed meter deposits seeds into the furrows. A pressing roller and a seed covering plate cover and suppress the seeds, completing the entire process of rotary tillage, fertilization, and seeding.

[0006] Both of these seeding systems perform ridging, sowing, and pressing after rotary tillage. The movement of the frame creates friction between the pressing wheel and the soil, driving the pressing wheel to rotate. This rotation compresses the soil and seed, creating close contact between the soil and seed, which facilitates the seed's absorption of moisture and increases germination. However, soil is relatively soft after rotary tillage and ridging, and its texture becomes sticky and soft. If the soil is too moist or too wet, the friction between the pressing wheel and the soil decreases, making it prone to slippage. Furthermore, finer, more sticky soils tend to adhere to the pressing wheel surface during compaction, creating an uneven layer between the wheel and the soil, leading to slippage. Slippage results in uneven distribution of pressure from the pressing wheel on the soil, resulting in overcompaction in some areas and undercompaction in others, affecting soil moisture retention and the growth environment for crop roots. Summary of the Invention

[0007] In view of this, the present invention provides a compound rotary tillage seeder to solve the technical problem in the prior art that after the soil is rotary tilled and ridged, the pressing wheel easily slips and affects the pressing effect.

[0008] In order to solve the above technical problems, the present invention provides a compound rotary tillage seeder, comprising a rotary tillage assembly, a ridging assembly and a pressing wheel sequentially mounted on a frame, a travel wheel rotatably connected to one side of the pressing wheel on the frame, the outer diameter of the travel wheel being larger than the outer diameter of the pressing wheel, a one-way bearing being mounted between the travel wheel and the pressing wheel, the central axis of the pressing wheel being connected to the inner ring of the one-way bearing, and the rotating shaft of the travel wheel being connected to the outer ring of the one-way bearing;

[0009] A scraper wheel is rotatably connected to the frame above the pressing wheel. The scraper wheel is transmission-connected to the travel wheel. The axial direction of the scraper wheel is parallel to the axial direction of the pressing wheel. A plurality of scraper plates are provided at circumferential intervals on the scraper wheel.

[0010] By adopting the above technical solution, a tractor drives the frame, which in turn drives the rotary tillage assembly, ridging assembly, and pressing wheel. The rotary tillage assembly tills the cultivated land, breaking up and agitating the soil, breaking up larger clods into smaller particles and loosening the soil. This breaks up the soil's compacted layer, increases soil aeration and water permeability, and promotes the growth and development of crop roots. Rotary tillage also cuts off weed roots and buries weeds and crop residues, effectively removing weeds and stubble, reducing competition between weeds and crops for nutrients, water, and sunlight, and helping to reduce the breeding grounds and sources of infection for pests and diseases.

[0011] After rotary tillage, the ridging assembly forms ridges on the cultivated land, creating furrows and ridge backs. During heavy rainfall, the furrows serve as drainage channels, allowing excess water to quickly drain out of the field, preventing waterlogging from damaging crop roots and minimizing the impact of waterlogging on crop growth. Ridging increases the soil surface area and its contact area with air, which facilitates the exchange of oxygen and carbon dioxide in the soil. Crop roots require oxygen for respiration, and good aeration promotes root growth and development, strengthening the root system and enhancing the crop's ability to absorb water and nutrients.

[0012] After ridge formation, the pressing wheel presses down the ridge back. After ridge formation, there may be some large clods or debris on the soil surface. Pressing crushes these clods, making the soil surface finer and smoother, creating a good seedbed for sowing. This promotes close contact between seeds and soil, improving sowing quality and seedling emergence rate. Pressing compacts the ridged soil, reduces large pores, and increases its bulk density. This helps improve the soil's water and nutrient retention capacity, preventing water and nutrients from escaping and facilitating absorption by crop roots.

[0013] After rotary tillage and ridge formation, the soil becomes sticky and soft. During the compaction process, when the compaction wheel comes into contact with the soil, moist soil easily adheres to the surface of the compaction wheel, causing the compaction wheel to slip. Because a one-way bearing is connected between the compaction wheel and the travel wheel, and the outer diameter of the travel wheel is larger than that of the compaction wheel, when the compaction wheel and the travel wheel move forward synchronously for the same distance, the speed of the compaction wheel is greater than that of the travel wheel, causing the compaction wheel to rotate counterclockwise relative to the travel wheel. When the compaction wheel slips due to the soil, and its speed is lower than the speed at which the travel wheel drives the outer ring of the one-way bearing to rotate, the outer ring is subjected to a rotational torque, and the roller begins to roll and generates a reaction force, pushing the inner ring to rotate accordingly, thereby driving the compaction wheel to continue rotating counterclockwise, which helps to reduce the impact of the compaction wheel slipping on the compaction effect.

[0014] The traveling wheel drives the scraper wheel to rotate, and the scraper plate on the scraper wheel can scrape off the mud adhering to the pressing wheel, which is beneficial to reduce the instantaneous change of friction between the pressing wheel and the soil caused by locally adhering mud, and thus helps to reduce the slipping of the pressing wheel.

[0015] Preferably, two wheel spur groups are provided on the circumference of the pressing wheel and near the two ends. The wheel spur groups are composed of a plurality of wheel spur intervals, and the scraper wheel is located between the two wheel spur groups.

[0016] By adopting the above technical solution, when the pressing wheel rotates, the spikes on the wheel spurs will penetrate deeply into the soil, increasing the friction between the pressing wheel and the soil. This allows the pressing wheel to more effectively transmit pressure to the soil during rolling, thereby enhancing the pressing effect and facilitating tighter soil compaction. At the same time, due to the close connection between the spikes and the soil, the wheel spurs can provide additional grip for the pressing wheel, reducing slippage during rolling, helping the pressing wheel to operate according to the predetermined trajectory and pressure, and improving the uniformity and consistency of the compaction.

[0017] The scraper wheel, located between the two spur groups, promptly removes dirt and debris adhering to the packer wheel surface during the compaction process, helping to reduce wheel slippage. The spaced-apart arrangement of the spur groups and the synergistic effect of the scraper wheel enable the packer wheel to maintain contouring capabilities on undulating terrain, helping to reduce wheel bouncing or slipping caused by locally adhered dirt, thereby maintaining a stable operating depth and speed.

[0018] Preferably, the scraper blade is in a herringbone shape along the radial direction of the scraper wheel.

[0019] By adopting the above technical solution, the herringbone structure divides the scraper blade into two symmetrical inclined surfaces, forming a V-shaped guide groove. When the pressure wheel rotates, the mud is quickly thrown out along the inclined surfaces on both sides under the combined action of centrifugal force and the inclined surfaces of the scraper blade, which helps to reduce the accumulation of mud on the leading edge of the scraper blade. The special shape of the herringbone scraper blade in the radial direction of the scraper wheel enables it to contact the mud on the surface of the pressure wheel more deeply during the scraping process. Compared with scrapers of ordinary shapes, the herringbone design increases the contact area and angle with the surface of the pressure wheel, which can better remove mud at different positions and depths on the surface of the pressure wheel and reduce mud residue.

[0020] Preferably, a profiling frame is installed on the frame, the profiling frame is a four-link mechanism, and the pressing wheel is installed on the profiling frame.

[0021] By adopting this technical solution, the four-link structure forms a parallelogram motion trajectory through the hinge points, allowing the pressure wheel to float vertically independently of the frame. The contoured frame can adjust the height of the pressure wheel according to the undulations of the ground, which helps the pressure wheel maintain the appropriate contact pressure and pressure depth at all times. This reduces the phenomenon of excessive or shallow pressure in some areas due to uneven ground, thereby improving the quality and uniformity of the pressure operation.

[0022] Preferably, a profiling spring is installed on the profiling frame, one end of the profiling frame is connected to one end of the profiling spring, the other end of the profiling frame is provided with a plurality of connecting grooves, and the other end of the profiling spring is connected to the connecting grooves.

[0023] By adopting this technical solution, the contour spring has a specific elastic coefficient. When the pressure wheel is subjected to different ground reaction forces, the spring will expand and contract accordingly. For example, when operating on softer soil, the pressure wheel encounters less resistance, and the spring will appropriately contract, reducing the pressure on the soil. On harder soil, the spring will expand, increasing the pressure on the soil. This pressure adjustment function allows the pressure wheel to operate with the appropriate pressure under different soil conditions, thereby improving the pressure reduction effect. By selecting contour springs with different elastic coefficients, the pressure adjustment range and sensitivity can be further adjusted.

[0024] Preferably, a mounting frame is provided on one side of the profiling frame, the mounting frame is connected to the frame, and the other side of the profiling frame is connected to the mounting frame, and the mounting frame is provided with a furrow opener and a seed bin.

[0025] By adopting this technical solution, the seed bin and furrow opener are mounted on a contouring frame, allowing the sowing equipment to complete both furrowing and sowing steps simultaneously. The furrow opener is responsible for creating appropriate grooves in the soil to provide the right planting space for the seeds; the seed bin stores the seeds and sows them precisely into the grooves at the appropriate time. The contouring frame automatically adjusts the height of the furrow opener and seed bin based on the undulations of the ground, ensuring that the furrow opener creates the appropriate groove depth and sows the seeds at the same depth in the soil. This reduces the problem of inconsistent sowing depths caused by uneven ground, thereby promoting more consistent seed germination and growth.

[0026] Preferably, a seed metering device is installed in the seed bin, and a transmission shaft of the seed metering device is transmission-connected to the central axis of the pressing wheel.

[0027] By adopting the above technical solution, the seeding speed of the seed meter can be matched to the travel speed of the pressure wheel through the transmission connection. During the rolling process of the pressure wheel, the rotation of its central axis is transmitted to the drive shaft of the seed meter, so that the seed meter can discharge seeds according to a certain ratio, which is conducive to improving the uniformity of seeding and reducing the occurrence of missed or double seeding.

[0028] Preferably, the ridging assembly includes a ridging roller and ridging disks installed at both ends of the ridging roller, and the ridging disks are frustum-shaped.

[0029] The above-mentioned technical solution creates a gradually converging outer contour of the frustum-shaped ridging disc. During operation, its outer edge first contacts and gathers the soil. As the planter advances, the soil, guided by the frustum, converges toward the center, ultimately forming a ridge under the further action of the ridging roller. During the ridging process, the ridging disc turns and stirs the soil, loosening it, promoting the growth and development of crop roots and improving soil aeration and water permeability.

[0030] Preferably, two contour frames are provided on one side of the ridging roller and between the two ridging discs, and the travel wheel is located at the position where the ridging disc and the ridging roller are connected.

[0031] With this technical solution, the running wheels are located at the junction of the ridging disc and the ridging roller, within the furrow. This provides a relatively flat and stable support surface for the running wheels. Compared to running on the ground at the back of the ridge, the more regular shape of the furrow provides more uniform rolling resistance for the running wheels, reducing vibration caused by hard soil or crop residue at the back of the ridge. This allows the running wheels to maintain better contact with the ground, improving the stability of the running wheels' movement and, in turn, facilitating stable pressing by the pressing wheels.

[0032] Preferably, the rotary tilling assembly includes a rotary tilling roller and a rotary tilling blade mounted on the rotary tilling roller.

[0033] By adopting this technical solution, the rotary roller provides support for the rotary blade, which, while breaking up the soil, also buries surface debris. During the tillage process, the rotary blade lifts and flips both soil and debris, burying the debris beneath. This not only helps remove debris from the field and reduces the breeding of pests and diseases, but also decomposes organic matter in the debris into the soil, increasing soil fertility.

[0034] The beneficial effects of the above technical solution of the present invention are as follows:

[0035] 1. The present invention is provided with a scraper wheel above the pressing wheel, and a scraper plate is provided on the scraper wheel. The scraper plate can scrape off the mud adhering to the pressing wheel, which is beneficial to reducing the instantaneous change of friction between the pressing wheel and the soil caused by locally adhering mud, and further beneficial to reducing the slipping of the pressing wheel; a one-way bearing is connected between the pressing wheel and the traveling wheel. When the pressing wheel slips due to mud and its rotation speed is lower than the speed at which the traveling wheel drives the outer ring of the one-way bearing to rotate, the traveling wheel can drive the pressing wheel to continue to rotate counterclockwise through the one-way bearing, which is beneficial to reducing the influence of the slipping of the pressing wheel on the pressing effect.

[0036] 2. The scraper blade of the present invention is designed in a herringbone shape. Compared with the scraper blades of ordinary shapes, the herringbone design increases the contact area and angle with the surface of the pressing wheel, which can better remove the mud at different positions and depths on the surface of the pressing wheel and reduce mud residue.

[0037] 3. The roller thorns on the pressing wheel can increase the friction between the pressing wheel and the soil, which is conducive to compacting the soil more tightly; at the same time, the wheel thorns can provide additional grip for the pressing wheel, reduce the sliding of the pressing wheel during rolling, and help improve the uniformity and consistency of the pressing wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1It is a structural schematic diagram of the composite rotary tillage seeder of the present invention;

[0039] Figure 2 It is a side view of the compound rotary tillage seeder of the present invention;

[0040] Figure 3 It is a structural schematic diagram of the profiling frame and the mounting frame of the present invention;

[0041] Figure 4 It is a cross-sectional view of the pressing wheel and the traveling wheel of the present invention;

[0042] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0043] Figure 6 A side view of the profiling frame and the mounting frame of the present invention;

[0044] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0045] In the figure: 1. frame; 11. contour frame; 111. side link 1; 112. upper link; 113. side link 2; 114. lower link; 115. contour spring; 116. connecting groove; 12. fixed frame; 13. mounting frame; 131. gearbox; 14. pressing wheel; 141. wheel thorn; 142. center shaft; 15. furrow opener; 16. seed bin; 161. seed metering device; 17. walking wheel; 171. rotating shaft; 18. one-way bearing; 19. scraper wheel; 191. scraper plate; 2. rotary tillage assembly; 21. rotary tillage roller; 22. rotary tillage blade; 3. ridging assembly; 31. ridging roller; 32. ridging disc; 4. ridge; 41. ridge furrow; 42. ridge back; 5. gearbox. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 7 , clearly and completely describe the technical solutions of the embodiments of the present invention.

[0047] Example

[0048] This embodiment provides a composite rotary tillage seeder. Figure 1 As shown, it includes a frame 1, a rotary tillage component 2 and a ridging component 3.

[0049] like Figure 1 As shown, the frame 1 is towed by a tractor and provides support for the rotary tillage assembly 2 and the ridging assembly 3 .

[0050] like Figure 2As shown, the rotary tillage assembly 2 includes a rotary tillage roller 21 rotatably mounted on the frame 1 and a rotary tillage blade 22 mounted on the rotary tillage roller 21. The axial direction of the rotary tillage roller 21 is perpendicular to the travel direction of the frame 1.

[0051] like Figure 2 As shown, the rotary tillage roller 21 provides support for the rotary tiller 22. The rotary tiller 22 not only breaks up the soil but also buries debris on the surface. During the tillage process, the rotary tiller 22 lifts and flips the soil and debris together, burying the debris in the lower soil layer. This not only helps remove debris from the field and reduces the breeding of pests and diseases, but also decomposes organic matter in the debris into the soil, increasing soil fertility.

[0052] like Figure 1 As shown, the ridging assembly 3 includes a ridging roller 31 rotatably mounted on the frame 1 and ridging discs 32 mounted at both ends of the ridging roller 31. The ridging discs 32 are frustum-shaped. In this embodiment, two ridging rollers 31 are provided and four ridging discs 32 are provided. The axial direction of the ridging rollers 31 is parallel to the axial direction of the rotary tillage roller 21.

[0053] like Figure 1 As shown, a gearbox 5 is provided on the frame 1 above the rotary tillage roller 21. The tractor transmits power to the gearbox 5, and the gearbox 5 transmits torque to the rotary tillage roller 21 and the ridging roller 31. The gearbox 5 and the rotary tillage roller 21 are connected by a gear set, and the gearbox 5 and the ridging roller 31 are connected by a chain transmission.

[0054] like Figure 1 As shown, after rotary tillage, the ridging assembly 3 forms ridges on the cultivated land, forming ridge furrows 41 and ridge backs 42. The frustum-shaped ridging disc 32 has a gradually converging outer profile. During operation, its outer edge first contacts the soil and begins to gather it. As the planter advances, the soil, guided by the frustum-shaped structure, continuously converges toward the center, ultimately forming a ridge 4 under the further action of the ridging roller 31.

[0055] like Figure 1 As shown, during heavy rainfall, ridges 41 can serve as drainage channels, allowing excess water to quickly drain from the field, preventing waterlogging from damaging crop roots and reducing the impact of waterlogging on crop growth. Ridge formation increases the soil surface area and its contact area with air, which facilitates the exchange of oxygen and carbon dioxide in the soil. Crop roots require oxygen for respiration, and good aeration promotes root growth and development, making the root system stronger and enhancing the crop's ability to absorb water and nutrients.

[0056] like Figure 2 As shown, a profiling frame 11 is installed on the frame 1, and the profiling frame 11 is a closed four-bar linkage mechanism.

[0057] Specifically, Figure 6 and Figure 7 As shown, the contouring frame 11 includes a hinged side link 111, an upper link 112, a second side link 113, and a lower link 114. The first side link 111 and the second side link 113 are opposite each other, while the upper link 112 and the lower link 114 are opposite each other. The second side link 113 is located near the frame 1 and is connected to the fixed frame 12. The fixed frame 12 is connected to the frame 1 so that the frame 1 drives the contouring frame 11 forward.

[0058] like Figure 3 and Figure 7 As shown, a mounting frame 13 is connected to the side link 111, a seed bin 16 is connected above the mounting frame 13, and a pressing wheel 14 and a furrow opener 15 are rotatably connected below the mounting frame 13. The furrow opener 15 is a double-disc furrow opener 15. The four-link structure forms a parallelogram motion trajectory through the hinge points, allowing the pressing wheel 14 and furrow opener 15 to float independently of the frame 1 in the vertical direction.

[0059] like Figure 2 and Figure 3 As shown, the seed bin 16 and furrow opener 15 are mounted on the contoured frame 11, allowing the seeder to complete both furrowing and sowing in one go. The furrow opener 15 is responsible for creating appropriate grooves in the soil to provide suitable planting space for the seeds, while the seed bin 16 stores the seeds and sows them precisely into the grooves at the appropriate time.

[0060] like Figure 2 and Figure 3 As shown, the contoured frame 11 can automatically adjust the height of the pressing wheel 14, the furrow opener 15 and the seed bin 16 according to the undulations of the ground, so that the furrow opener 15 can open a groove at an appropriate depth and sow the seeds in the soil at the same depth, reducing the problem of inconsistent sowing depth due to uneven ground, thereby helping to improve the consistency of seed germination and growth; it is also beneficial for the pressing wheel 14 to always maintain appropriate contact pressure and pressing depth with the ground, reducing the phenomenon of excessive or shallow pressing in some areas due to uneven ground, thereby improving the quality and uniformity of the pressing operation.

[0061] like Figure 3 and Figure 6 As shown, a seed meter 161 is installed in the seed bin 16. A gearbox 131 is installed on the mounting frame 13 above the pressure wheel 14. The central shaft 142 of the pressure wheel 14 is connected to the input shaft of the gearbox 131 via a chain, directing power to the gearbox 131. The gearbox 131 adjusts its output speed and torque based on the operating requirements of the pressure wheel 14 and the seed meter 161. The power output from the gearbox 131 drives the seed meter 161 via a chain drive.

[0062] like Figure 3 and Figure 6 As shown, the pressing wheel 14 transmits power to the seed meter 161 during the rolling process, so that the seed meter 161 discharges seeds according to a certain ratio, which is beneficial to improving the uniformity of sowing and reducing the phenomenon of missed sowing or repeated sowing.

[0063] like Figure 6 and Figure 7 As shown, a profiling spring 115 is installed on the profiling frame 11, the lower connecting rod 114 is connected to one end of the profiling spring 115, and the upper connecting rod 112 is provided with a plurality of connecting grooves 116, and the other end of the profiling spring 115 is connected to the connecting groove 116.

[0064] like Figure 6 and Figure 7 As shown, the contour spring 115 has a specific elastic coefficient. When the pressure wheel 14 is subjected to varying ground reaction forces, the spring expands and contracts accordingly. For example, when operating on softer soil, the pressure wheel 14 encounters less resistance, causing the spring to contract appropriately, reducing the pressure exerted by the pressure wheel 14 on the soil. On the other hand, on harder soil, the spring expands, increasing the pressure exerted by the pressure wheel 14 on the soil. This pressure adjustment function allows the pressure wheel 14 to operate with appropriate pressure under varying soil conditions, thereby improving the pressure reduction effect. By selecting contour springs 115 with different elastic coefficients, the pressure adjustment range and sensitivity can be further adjusted.

[0065] like Figure 1 and Figure 3 As shown, this embodiment is provided with four profiling frames 11, four pressing wheels 14, four furrow openers 15 and four seed bins 16. Two profiling frames 11 are provided on one side of each ridging roller 31 and between the two ridging discs 32, that is, two rows of seeds are sown on each ridge back 42.

[0066] like Figure 1 and Figure 3 As shown, a travel wheel 17 is rotatably connected to one side of the pressing wheel 14 on the frame 1. The outer diameter of the travel wheel 17 is larger than the outer diameter of the pressing wheel 14. The axial direction of the travel wheel 17 and the axial direction of the pressing wheel 14 are both parallel to the axial direction of the ridging roller 31. In this embodiment, four travel wheels 17 are provided, that is, one pressing wheel 14 corresponds to one travel wheel 17.

[0067] like Figure 4 and Figure 5 As shown, a one-way bearing 18 is installed between the traveling wheel 17 and the pressing wheel 14 , the central axis 142 of the pressing wheel 14 is connected to the inner ring of the one-way bearing 18 , and the rotating shaft 171 of the traveling wheel 17 is connected to the outer ring of the one-way bearing 18 .

[0068] like Figure 4 and Figure 5As shown, when the tractor pulls the frame 1 forward, the pressing wheel 14 and the traveling wheel 17 both rotate counterclockwise, and the rotation speed of the pressing wheel 14 is greater than that of the traveling wheel 17, causing the pressing wheel 14 to rotate counterclockwise relative to the traveling wheel 17. When the pressing wheel 14 slips due to the soil and its rotation speed is lower than the speed at which the traveling wheel 17 drives the outer ring of the one-way bearing 18 to rotate, the outer ring is subjected to a rotational torque, causing the roller to roll and generate a reaction force, pushing the inner ring to rotate accordingly, thereby driving the pressing wheel 14 to continue to rotate counterclockwise, which helps to reduce the impact of the slipping of the pressing wheel 14 on the pressing effect.

[0069] like Figure 1 and Figure 3 As shown, each ridge back 42 is equipped with two pressing wheels 14 and two running wheels 17. The two pressing wheels 14 are located between the two running wheels 17, and the running wheels 17 are located at the junction of the ridging disc 32 and the ridging roller 31, namely, the ridge furrow 41. The ridge furrow 41 provides a relatively flat and stable support surface for the running wheels 17. Compared to running on the ground at the ridge back 42, the more regular shape of the ridge furrow 41 allows the running wheels 17 to better contact the ground, which helps stabilize the movement of the running wheels 17 and, in turn, helps the pressing wheels 14 to perform stable pressing.

[0070] like Figure 1 and Figure 3 As shown, a scraper wheel 19 is rotatably connected to the mounting frame 13 above the pressing wheel 14. The scraper wheel 19 is connected to the traveling wheel 17 via a chain transmission. The axial direction of the scraper wheel 19 is parallel to the axial direction of the pressing wheel 14. A plurality of scraper plates 191 are provided at circumferential intervals on the scraper wheel 19. The scraper plates 191 are in a herringbone shape along the radial direction of the scraper wheel 19.

[0071] like Figure 1 and Figure 3 As shown, the traveling wheel 17 drives the scraper wheel 19 to rotate, and the scraper plate 191 on the scraper wheel 19 can scrape off the mud adhering to the pressing wheel 14, which is beneficial to reducing the instantaneous change of friction between the pressing wheel 14 and the soil caused by locally adhering mud, and further helps to reduce the slipping phenomenon of the pressing wheel 14.

[0072] like Figure 1 and Figure 3 As shown, the scraper blade 191 is designed in a herringbone structure, dividing it into two symmetrical slopes, forming a V-shaped guide trough. When the pressure wheel 14 rotates, the centrifugal force and the slopes of the scraper blade 191 facilitate rapid removal of soil along the slopes on both sides, thereby reducing accumulation at the leading edge of the scraper blade 191. Compared to conventional scraper blades 191, the herringbone-shaped scraper blade 191 increases the contact area and angle with the surface of the pressure wheel 14, effectively removing soil from different locations and depths on the surface of the pressure wheel 14 and reducing residual soil.

[0073] like Figure 3 As shown, two wheel spur groups are provided on the circumference of the pressing wheel 14 and near the two ends. The wheel spur groups are composed of multiple wheel spurs 141 at intervals, that is, multiple wheel spurs 141 are evenly distributed on the circumference of the pressing wheel 14, and the scraper wheel 19 is located between the two wheel spur groups.

[0074] like Figure 3 As shown, when the pressing wheel 14 rotates, the spikes on the wheel spurs 141 penetrate deeply into the soil, increasing the friction between the pressing wheel 14 and the soil. This allows the pressing wheel 14 to more effectively transmit pressure to the soil during rolling, thereby enhancing the compaction effect and facilitating tighter soil compaction. Furthermore, due to the close engagement of the spikes with the soil, the wheel spurs 141 provide additional grip for the pressing wheel 14, reducing slippage during rolling. This helps the pressing wheel 14 operate according to a predetermined trajectory and pressure, thereby improving the uniformity and consistency of compaction.

[0075] The synergistic effect of the spaced distribution of the wheel spur groups and the scraper wheel 19 enables the pressing wheel 14 to maintain contouring movement in undulating terrain, which is beneficial to reducing the jumping or slipping of the pressing wheel 14 caused by locally adhered mud.

[0076] The implementation principle of a composite rotary tillage seeder in this embodiment is as follows:

[0077] The tractor pulls the frame 1 forward, the rotary tillage roller 21 drives the rotary tillage blade 22 to rotate, and the soil is rotary tilled. The ridging disc 32 and the ridging roller 31 ridge the soil to form a ridge 41 and a ridge back 42.

[0078] The frame 1 drives the contour frame 11 to move synchronously, the furrow opener 15 opens a groove, the seeds in the seed bin 16 fall into the groove, and the pressing wheel 14 presses the seeds to complete the furrowing, sowing and pressing.

[0079] The traveling wheel 17 travels inside the ridge back 42. When the pressing wheel 14 slips due to the soil, and its rotation speed is lower than the speed at which the traveling wheel 17 drives the outer ring of the one-way bearing 18 to rotate, when the outer ring is subjected to the rotational torque, the roller begins to roll and generates a reaction force, pushing the inner ring to rotate accordingly, thereby driving the pressing wheel 14 to continue to rotate counterclockwise, which is beneficial to reducing the impact of the slipping of the pressing wheel 14 on the pressing effect.

[0080] The travel wheel 17 drives the scraper wheel 19 to rotate, and the scraper blade 191 on the scraper wheel 19 can scrape away the mud adhering to the pressure wheel 14, which helps to reduce the instantaneous change in friction between the pressure wheel 14 and the soil caused by locally adhering mud, thereby helping to reduce the slippage of the pressure wheel 14. The wheel spurs 141 can provide additional grip for the pressure wheel 14, which helps to reduce the slippage of the pressure wheel 14 during rolling.

[0081] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 connection of two components.

Claims

1. A composite rotary tillage seeder, comprising a rotary tillage assembly (2), a ridging assembly (3) and a pressing wheel (14) sequentially mounted on a frame (1), characterized in that: A travel wheel (17) is rotatably connected to one side of the pressing wheel (14) on the frame (1), the outer diameter of the travel wheel (17) is larger than the outer diameter of the pressing wheel (14), a one-way bearing (18) is installed between the travel wheel (17) and the pressing wheel (14), the central axis (142) of the pressing wheel (14) is connected to the inner ring of the one-way bearing (18), and the rotating axis (171) of the travel wheel (17) is connected to the outer ring of the one-way bearing (18); The pressing wheel (14) and the traveling wheel (17) both rotate counterclockwise, and the rotation speed of the pressing wheel (14) is greater than the rotation speed of the traveling wheel (17), so that the pressing wheel (14) rotates counterclockwise relative to the traveling wheel (17); when the pressing wheel (14) slips due to the soil, and its rotation speed is lower than the speed at which the traveling wheel (17) drives the outer ring of the one-way bearing (18) to rotate, when the outer ring is subjected to the rotational torque, the roller begins to roll and generates a reaction force, pushing the inner ring to rotate accordingly, thereby driving the pressing wheel (14) to continue to rotate counterclockwise, which is conducive to reducing the influence of the slipping of the pressing wheel (14) on the suppression effect; A scraper wheel (19) is rotatably connected to the frame (1) above the pressure wheel (14), and the scraper wheel (19) is transmission-connected to the travel wheel (17). The axial direction of the scraper wheel (19) is parallel to the axial direction of the pressure wheel (14), and a plurality of scraper plates (191) are provided at intervals in the circumferential direction of the scraper wheel (19). Along the radial direction of the scraper wheel (19), the scraper blade (191) is in a herringbone shape.

2. The compound rotary tillage seeder according to claim 1, characterized in that: Two wheel spur groups are provided at the circumference of the pressure wheel (14) and near both ends. The wheel spur groups are composed of a plurality of wheel spurs (141) spaced apart. The mud scraping wheel (19) is located between the two wheel spur groups.

3. The compound rotary tillage seeder according to claim 1, characterized in that: A profiling frame (11) is installed on the frame (1), and the profiling frame (11) is a four-link mechanism, and a pressure wheel (14) is installed on the profiling frame (11).

4. The compound rotary tillage seeder according to claim 3, characterized in that: A profiling spring (115) is installed on the profiling frame (11), one end of the profiling frame (11) is connected to one end of the profiling spring (115), and the other end of the profiling frame (11) is provided with a plurality of connecting grooves (116), and the other end of the profiling spring (115) is connected to the connecting groove (116).

5. The compound rotary tillage seeder according to claim 4, characterized in that: A mounting frame (13) is provided on one side of the profiling frame (11), the mounting frame (13) is connected to the frame (1), and the mounting frame (13) is connected to the other side of the profiling frame (11). A furrow opener (15) and a seed bin (16) are provided on the mounting frame (13).

6. The compound rotary tillage seeder according to claim 5, characterized in that: A seed metering device (161) is installed in the seed bin (16), and a transmission shaft of the seed metering device (161) is transmission-connected to a central shaft (142) of the pressing wheel (14).

7. The compound rotary tillage seeder according to claim 6, characterized in that: The ridging assembly (3) comprises a ridging roller (31) and ridging discs (32) mounted at both ends of the ridging roller (31), wherein the ridging discs (32) are in the shape of a frustum.

8. The compound rotary tillage seeder according to claim 7, characterized in that: Two contour frames (11) are provided on one side of the ridging roller (31) and between the two ridging discs (32), and the travel wheel (17) is located at the connection portion between the ridging discs (32) and the ridging roller (31).

9. The compound rotary tillage seeder according to claim 8, characterized in that: The rotary tillage assembly (2) comprises a rotary tillage roller (21) and a rotary tillage blade (22) mounted on the rotary tillage roller (21).

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