CN120513725B - An agricultural seeder - Google Patents

Abstract

The invention provides an agricultural seeder, which relates to the technical field of seeding equipment and comprises a profiling frame, a furrow opener and a pressing wheel, wherein the profiling frame is arranged on a frame, the furrow opener and the pressing wheel are connected to the profiling frame, the profiling frame is a four-bar mechanism and is provided with a lower connecting rod and a side connecting rod I, the furrow opener is rotationally connected to the side connecting rod I, the side connecting rod I is hinged with a pressing wheel frame, the pressing wheel is rotationally connected to the pressing wheel frame, a pressing wheel spring is connected between the pressing wheel frame and the side connecting rod I, a locking bar is hinged on the side connecting rod I, a locking bar spring is connected between the locking bar and the side connecting rod I, a locking tooth I is arranged at the upper part of the locking bar, a locking tooth II meshed with the locking tooth I is arranged at the end part of the lower connecting rod, and a stirring baffle is connected to the end part of the locking bar. The stirring baffle can rotate when stirring soil, so that the profiling frame is locked, the furrow opener cannot float upwards, the pressing wheel can roll and pass over soil blocks, and the influence of the up-and-down floating of the furrow opener on the furrow opening depth in a short time can be reduced.

Description

Agricultural seeder

Technical Field

The invention relates to the technical field of seeding equipment, in particular to an agricultural seeder.

Background

The seeder is a planting machine which takes crop seeds as seeding objects and can sow the seeds into soil. Generally comprises a frame, a traction or suspension device, a seed box, a seed sowing device, a transmission device, a seed conveying pipe, a furrow opener, a rower, a travelling wheel, a soil covering device and the like. The drill seeder is one of the seed drill, and is mainly used for seeding small seeds such as grains, vegetables, pastures and the like. During operation, the travelling wheel drives the seed sowing wheel to rotate, seeds are discharged into the seed conveying pipe from the seeds in the seed box according to the required sowing amount, fall into the opened groove through the furrow opener, and then are covered and compacted by the earthing and compacting device. The combined seeder consists of a seeding part and a related operation part, and can complete a plurality of related operations such as rotary tillage, fertilization, earthing, compacting and the like while seeding.

For example, patent document CN115413436B discloses a multi-style adjustable planter integrated with a seed-sowing and direct-seeding, the planter comprising a fertilizer placement box, a grass-spreading mechanism, a sowing mechanism, rotary tillage rollers, and a pear head. Through the cooperation of the grass dispersing mechanism, the rotary tillage roller, the plowshare, the blanking mechanism, the seeding mechanism and the pesticide spraying baffle plate, the continuous operation of grass dispersing, rotary tillage, ditching, fertilizing, seeding and pesticide spraying can be realized in a single operation.

When the seedling is sown, if the sowing machine cannot adjust along with the height of the land, the sowing depth is different, some seeds are sown very deeply, so that seedlings are difficult to land out, excessive energy is consumed, the seedlings are thin and weak, some seeds are very shallow, are easily influenced by drought, wind blowing and the like, are difficult to root and firm, the sprouting time and the sprouting rate are inconsistent, and the uniformity of the seedlings is also influenced.

The prior art improves on the sowing machine, and refers to a patent document with publication number CN109511326B, which discloses a corn synchronous side deep fertilization no-tillage sowing machine. The seed ditch opened by the double-disc furrow opener and the fertilizer ditch opened by the L-shaped furrow opener are utilized by the seeder, the pressing wheel presses the seed ditch after sowing, and the single four-bar copying device is connected at one end of the frame and is connected with one end of the single body to float.

The seeder utilizes the single four-bar profiling device to automatically profile the earth surface along with the fluctuation, is favorable for the consistency of the depths of seed furrows and fertilizer furrows which are formed by the double-disc furrow opener and the L-shaped furrows and shovels, and further ensures that the sowing depth is consistent with the fertilizer depth. However, because the furrow opener and the pressing wheel float synchronously, irregular materials such as partial larger soil blocks and straws and the like are contained in the cultivated land, the pressing wheel can be influenced to float upwards, the furrow opener and the pressing wheel float upwards together in a short time, the ditching depth of the furrow opener in the short time is reduced, and partial shallow seed sowing is caused.

Disclosure of Invention

In view of the above, the invention provides an agricultural seeder, which solves the technical problem that partial large soil blocks in farmland in the prior art can cause floating upwards in a short time of a pressing wheel and a furrow opener, so that the depth of partial seeds is abnormal.

In order to solve the technical problems, the invention provides an agricultural seeder which comprises a profiling frame, a furrow opener and a pressing wheel, wherein the profiling frame is arranged on a frame, the furrow opener is connected to the profiling frame, the profiling frame is a four-bar mechanism and is provided with a lower connecting rod and a side connecting rod I, the furrow opener is rotationally connected to the side connecting rod I;

The side connecting rod I is hinged with an L-shaped locking rod, a locking rod spring is connected between the locking rod and the side connecting rod I, a first locking tooth is arranged on the upper portion of the locking rod and close to the lower connecting rod, a second locking tooth meshed with the first locking tooth is arranged on the end portion of the lower connecting rod, a material stirring baffle is connected with the end portion of the locking rod, and the material stirring baffle gradually inclines downwards from one end close to the furrow opener to one end close to the pressing wheel.

Through adopting above-mentioned technical scheme, the tractor drives the frame and removes, and then drives furrow opener and suppression wheel, and after the furrow opener ditched, the seed whereabouts, the suppression wheel is suppressed the seed, makes the seed inlay in soil, increases the close contact degree of seed and soil, is favorable to the seed to absorb the moisture in the soil, improves rate of emergence and uniformity. Meanwhile, the compacting can reduce macropores in soil, reduce the evaporation rate of water and play a role in preserving soil moisture. The profiling frame floats together with the furrow opener and the pressing wheel, so that the profiling frame is convenient to adapt to the change of the topography of the cultivated land. When the surface of the land block is uneven, the profiling frame can enable the furrow opener and the pressing wheel to float up and down along with the change of the terrain, and the distance between the furrow opener and the pressing wheel and the ground is kept relatively fixed, so that the sowing depth is uniform and consistent, the seeds can obtain relatively consistent moisture, oxygen and temperature conditions in the soil, and the germination rate and the emergence uniformity of the seeds are improved.

The stirring baffle can stir out soil blocks in soil, so that the influence of the soil blocks on the close connection of seeds and soil is reduced. Because the locking lever articulates on side connecting rod one, when the soil block is great, the stirring baffle upwards rotates, and then drive the upper end of locking lever to the direction rotation that is close to lower connecting rod, make the first and second meshing of wheel on the lower connecting rod of locking tooth on the locking lever, and then make the profile modeling frame lock, the furrow opener can not float upwards, and simultaneously, along with the removal of frame, the press wheel can roll the soil block, under the elasticity effect of pinch roller spring, the press wheel can cross the soil block, and supplementary press wheel is with soil block compaction or crushing when rolling the soil block, and the position of furrow opener is unchangeable in this process, can reduce the influence of the floating of furrow opener upper and lower position to the furrow depth, thereby be favorable to the degree of depth unanimity of seed sowing.

Preferably, the profiling frame further comprises an upper connecting rod, a connecting piece is arranged at a hinged position of the upper connecting rod and the side connecting rod, a plurality of connecting holes are formed in the connecting piece, a profiling spring is connected between the connecting holes and the lower connecting rod, and the elastic force of the pinch roller spring is larger than that of the profiling spring.

Through adopting above-mentioned technical scheme, profile modeling spring can separate into triangle-shaped structure with quadrangular profile modeling frame, forms triangle-shaped structure promptly between profile modeling spring, lower connecting rod and the side connecting rod, and profile modeling spring can take place elastic deformation because of receiving pressure or pulling force effect to maintain the stability of suppression wheel suppression, play good suppression performance. The connecting piece is provided with a plurality of connecting holes, and the profiling spring can be connected with one connecting hole and the lower connecting rod, so that the elastic coefficient of the profiling spring can be adjusted. The greater the elastic coefficient is, the greater the compacting effect can be provided to the compacting wheel, but the buffering effect is relatively poor. The smaller the elastic coefficient is, the better buffering effect can be provided by the compacting wheel, but the compacting effect is weaker. When the profiling frame drives the pressing wheel and the furrow opener to adapt to different terrains, the elastic force of the profiling spring enables the pressing wheel and the furrow opener to float, when larger soil blocks are encountered, the first wheel is meshed with the second wheel, the profiling frame is locked, the profiling spring is fixed, and when the pressing wheel rolls the soil blocks, the pressing wheel can float and roll the soil blocks under the elastic action of the pressure spring.

Preferably, the pinch roller frame is provided with an inverted U-shaped scraping plate, and the scraping plate can scrape soil on two sides of the furrow opener.

By adopting the technical scheme, the furrow opener can contact various sundries such as weeds, straw, soil and the like in the sowing process. The scraping plate can timely scrape sundries attached to the furrow opener, so that the normal work of the furrow opener is prevented from being influenced by sundry accumulation, and smoothness and depth consistency of furrowing are facilitated. For the soil with larger viscosity, the furrow opener is easy to stick with soil during working, so that the weight and the rotation resistance of the furrow opener are increased, and even the sowing depth and the sowing quality are influenced. The scraping plate can continuously scrape the surface of the furrow opener, so that the adhesion of clay is reduced, and the furrow opener keeps a good working state.

Preferably, the two sides of the pressing wheel on the pressing wheel frame are provided with earthing rods, one ends of the earthing rods, which are far away from the pressing wheel frame, are in a V shape, and the parts, which are close to the pressing wheel, of the earthing rods are spirally coiled.

By adopting the technical scheme, the soil can be stirred by the earthing rod, one end of the earthing rod far away from the pressing wheel frame is in a V shape, which is favorable for covering seeds by the soil, is favorable for keeping the moisture and the nutrient of the soil and improves the germination rate of the seeds. The spiral winding of the earthing rod has certain flexibility and elasticity, and can adapt to stretching, bending or deformation to a certain extent, so that the earthing rod generates certain floating, thereby being convenient for adapting to different terrains.

Preferably, the profiling frame further comprises a second side connecting rod hinged with the upper connecting rod and the lower connecting rod, the second side connecting rod is connected with a fixing frame, and the fixing frame is connected with the frame.

Through adopting above-mentioned technical scheme, side connecting rod two is relative with side connecting rod one, and the profile modeling frame passes through the mount to be fixed in the frame, and the tractor drives the frame motion, and then drives pinch roller and furrow opener rotation, realizes ditching, seeding and suppression.

Preferably, the rotary tillage roller is rotationally connected on the frame, a plurality of rotary tillage blades are arranged on the rotary tillage roller, and the pressing roller is rotationally arranged on one side of the rotary tillage roller on the frame.

Through adopting above-mentioned technical scheme, the removal of frame drives rotary tillage roller and the rotation of pressure roller, and the rotary tillage roller drives the rotary tillage sword and carries out the rotary tillage to the cultivated land, can overturn soil, turn over and break up, makes the oxygen in the soil more sufficient, strengthens the air permeability and the moisture permeability of soil, is favorable to organic matter decomposition and the nutrient release in the soil to be favorable to creating good soil cultivation layer structure and surface condition, coordinate factors such as moisture, nutrient, air, heat, improve soil fertility, provide good condition for seeding and crop growth, field management. After rotary tillage, the seeds are compacted by the compacting roller, so that soil can be settled, ventilation moisture loss is reduced, the sowed seeds can be tightly connected with the soil, and the germination rate of the seeds is improved.

Preferably, a plurality of roller thorns are arranged at intervals on the periphery of the pressing roller.

Through adopting above-mentioned technical scheme, the roller thorn can break great soil block in the soil, makes soil particle more even to be favorable to improving the compactness of soil, in the roller thorn inserts the soil, increased the area of contact and the frictional force of suppression roller with soil, make the suppression roller can combine with the soil more closely, thereby more effectively compaction soil. Meanwhile, the roller thorns can reduce the adhesion of soil on the pressing roller, so that the resistance of the pressing roller to travel is reduced, and the working efficiency is improved.

Preferably, a fertilizer bin is arranged above the rotary tillage roller on the frame, a lower fertilizer pipe is obliquely arranged below the fertilizer bin, and a pipe orifice of the lower fertilizer pipe is positioned between the rotary tillage roller and the pressing roller.

Through adopting above-mentioned technical scheme, the rotary tillage roller is to the soil rotary tillage back, and the chemical fertilizer in the chemical fertilizer storehouse falls through fertile pipe down, then the compacting roller is suppressed, and the compacting can make soil become compact, reduces the space in the soil, prevents that fertilizer from evaporating along with moisture loss or because of the circulation of air in soil. Meanwhile, the compacting can promote the full contact of the soil and the fertilizer, so that the fertilizer is better dissolved and diffused in the soil, the possibility that the fertilizer runs off to the air in a gas form is reduced, the root system absorption of crops is facilitated, and the utilization rate of the fertilizer is improved.

Preferably, a seed bin is arranged above the pressing roller, and a discharging pipe is arranged on the furrow opener.

Through adopting above-mentioned technical scheme, after the roller suppression, furrow opener ditching, the seed in the seed storehouse is through unloading pipe whereabouts, and the roller is suppressed the seed, and earthing pole stirs soil and covers the seed, accomplishes the seeding operation.

Preferably, a soil covering plate is hinged between the pressing roller and the lower fertilizer pipe on the frame.

Through adopting above-mentioned technical scheme, the earthing board can stir soil, forms one deck overburden at soil surface, reduces the direct evaporation of soil moisture, plays the effect of preserving moisture in soil moisture, helps keeping the suitable humidity of soil, provides good moisture condition for seed germination and seedling growth, covers the chemical fertilizer that falls simultaneously, is favorable to reducing the loss of fertilizer.

The technical scheme of the invention has the following beneficial effects:

1. according to the material stirring baffle disclosed by the invention, soil blocks in soil can be stirred out, when the soil blocks are large, the material stirring baffle can rotate, so that the profiling frame is locked, the furrow opener cannot float upwards, meanwhile, along with the movement of the frame, the pressing wheel can roll and pass over the soil blocks under the action of the elastic force of the pressing wheel spring, the position of the furrow opener is unchanged in the process, the influence of the up-and-down floating of the furrow opener on the furrow depth in a short time can be reduced, and the depth consistency of seed sowing is facilitated.

2. The profiling spring on the profiling frame can maintain the stability of the pressing wheel, the elastic coefficient of the profiling spring can be adjusted, and the profiling spring has adaptability to the pressing of cultivated lands with different terrains and soil conditions.

3. After the rotary tillage roller is used for rotary tillage of soil, chemical fertilizers in the chemical fertilizer bin fall through the lower fertilizer pipe, and then the pressing roller is used for pressing, so that the soil can be compacted, the loss of the fertilizer along with water is reduced, the possibility that the fertilizer is lost to the air in a gas form is also reduced, the sown seeds can be conveniently closely connected with the soil, and the germination rate of the seeds is improved.

Drawings

FIG. 1 is a schematic view of the agricultural planter of the present invention;

FIG. 2 is a side view of the agricultural planter of the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a schematic view of the configuration of the profile modeling frame, the roller and the furrow opener of the present invention;

FIG. 5 is a side view of the profiling bracket, press wheel and furrow opener of the present invention;

FIG. 6 is an enlarged view at B in FIG. 5;

Fig. 7 is a side view of a kick-out plate of the present invention.

The device comprises a frame 1, a lower fertilizer pipe 11, a chain box 12, a power wheel 131, a ball joint 132, a connecting rod 14, a soil covering plate 15, a scraping plate 2, a rotary tillage roller 21, a rotary tillage cutter 3, a pressing roller 31, a roller thorn 4, a profiling frame 41, a side connecting rod I411, a pressing wheel frame 412, a connecting frame 413, a pressing wheel spring 42, an upper connecting rod 43, a side connecting rod II, a 431, a fixing frame 44, a lower connecting rod 441, a locking tooth II, a locking rod 45, a 451, a locking rod spring 452, a locking tooth I453, a stirring baffle plate 454, a mounting plate 46, a connecting piece 461, a connecting hole 462, a profiling spring 47, a scraping plate 48, a soil covering rod 5, a furrow opener 51, a lower material pipe 52, a disc 6, a pressing wheel 7, a seed bin 8 and a fertilizer bin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 7 of the embodiments of the present invention.

Examples

The embodiment provides an agricultural seeder, as shown in fig. 1, comprising a frame 1 pulled by a tractor, wherein a rotary tillage roller 2, a pressing roller 3, a furrow opener 5 and a pressing wheel 6 are sequentially connected on the frame 1 along the advancing direction in a rotating manner. A fertilizer bin 8 and a seed bin 7 are also arranged above the frame 1, the fertilizer bin 8 is positioned above the rotary tillage roller 2, and the seed bin 7 is positioned above the pressing roller 3.

As shown in fig. 1, the rotary tillage roller 2, the pressing roller 3, the furrow opener 5 and the pressing wheel 6 are axially parallel and perpendicular to the travelling direction of the frame 1, a plurality of furrow openers 5 are uniformly distributed along the axial direction of the furrow opener 5, a plurality of pressing wheels 6 are uniformly distributed along the axial method of the pressing wheels 6, and each pressing wheel 6 corresponds to the furrow opener 5 one by one.

As shown in fig. 1, a plurality of rotary blades 21 are mounted on the peripheral side of the rotary tillage roller 2, and the rotary tillage blades 21 rotate along with the rotary tillage roller 2 to perform rotary tillage on the cultivated land, so that good conditions are provided for sowing, crop growth and field management. The rotary tillage is followed by compacting by the compacting roller 3, so that soil can be settled, ventilation moisture loss is reduced, the sowed seeds can be closely connected with the soil, and the germination rate of the seeds is improved.

As shown in fig. 1, a plurality of lower fertilizer pipes 11 are obliquely arranged below the fertilizer bin 8 on the frame 1, and the pipe orifice of each lower fertilizer pipe 11 is positioned between the rotary tillage roller 2 and the pressing roller 3.

As shown in fig. 2 and 3, a fertilizer apparatus (not shown in the drawings) is rotatably connected to the fertilizer bin 8, and the structure of the fertilizer apparatus is not described in detail. The rotation of the fertilizer distributor is driven by the pressing roller 3, specifically, the rotation shaft of the fertilizer distributor is connected with the rotation shaft of the pressing roller 3 through a chain (not shown in the figure), the frame 1 is provided with a chain box 12, and the chain is positioned in the chain box 12. The travel of the frame 1 drives the pressing roller 3 to rotate, and the fertilizer distributor is driven to rotate through the transmission of a chain, so that the fertilizer is dropped.

As shown in fig. 1, after the rotary tillage roller 2 rotates the cultivated land, the fertilizer in the fertilizer bin 8 falls down through the fertilizer discharging pipe 11, and then the compacting roller 3 compacts the soil, so that the loss of the fertilizer along with the water is reduced, the possibility that the fertilizer is lost to the air in a gas form is reduced, ventilation and moisture loss are reduced, the sowed seeds can be conveniently closely connected with the soil, and the germination rate of the seeds is improved.

As shown in fig. 2 and 3, a mud scraping plate 15 is obliquely arranged on one side of the frame 1, which is positioned on the press roller 3, and the mud scraping plate 15 gradually inclines downwards from one side far away from the press roller 3 to one side close to the press roller 3, so that mud on the press roller 3 can be scraped by the mud scraping plate 15, and the movement resistance of the press roller 3 is reduced.

As shown in fig. 2 and 3, a soil covering plate 14 is hinged on the frame 1 between the pressing roller 3 and the lower fertilizer pipe 11. The soil covering plate 14 gradually inclines downwards from one end close to the rotary tillage roller 2 to the position close to the pressing roller 3.

As shown in fig. 3, the soil covering plate 14 can stir the soil to form a covering layer on the surface of the soil, so that direct evaporation of soil moisture is reduced, the soil moisture preservation and moisture preservation function is realized, the proper humidity of the soil is maintained, good moisture conditions are provided for seed germination and seedling growth, and meanwhile, falling chemical fertilizers are covered, so that the loss of the fertilizers is reduced.

As shown in fig. 2 and 3, a plurality of roller thorns 31 are provided at intervals on the circumferential side of the press roller 3. The roller thorns 31 can crush soil blocks in the soil, so that soil particles are more uniform, the compactness of the soil is improved, meanwhile, the roller thorns 31 can reduce the adhesion of the soil on the compacting roller 3, the running resistance of the compacting roller 3 is reduced, and the operation efficiency is improved.

As shown in fig. 2, the furrow opener 5 then furrows, the seeds in the seed bin 7 fall down, and the compacting wheel 6 compacts the seeds, so that the seeds are embedded in the soil, and the tight contact degree between the seeds and the soil is increased. According to the embodiment, through twice compacting, the soil around the seeds can be compacted, the seeds are fully contacted with wet soil, the seeds are facilitated to absorb moisture in the soil, the emergence rate and uniformity are improved, meanwhile, certain compacting effect is achieved on weed seeds or seedlings on the soil surface, and the growth and the emergence of weeds can be hindered.

As shown in fig. 4, the furrow opener 5 and the pressing wheel 6 are arranged on the profiling frame 4, the number of the profiling frames 4 is identical to that of the furrow opener 5, and the profiling frames 4 are closed four-bar mechanisms.

As shown in fig. 2 and 4, the profile modeling rack 4 includes a side link 41, an upper link 42, a side link 43 and a lower link 44, which are hinged in order. The second side link 43 is a part close to the frame 1, the second side link 43 is connected with a fixing frame 431, and the fixing frame 431 is connected with the frame 1, so that the frame 1 drives the profiling frame 4, the furrow opener 5 and the pressing wheel 6 to move.

As shown in fig. 4, the first side link 41 is disposed at a position opposite to the second side link 43, and the upper link 42 and the lower link 44 are opposite. After the side link 41 forms a closed loop with the lower link 44, the side link 43 and the upper link 42, an extension section is downwardly provided, the furrow opener 5 is rotatably mounted on the extension section, and the furrow opener 5 is a double-disc 52 furrow opener 5 on the market, and the structure thereof is not described in detail.

As shown in fig. 4, the two side links 43, the upper link 42 and the lower link 44 are hinged to form two groups, the two groups of side links 43, the upper link 42 and the lower link 44 are hinged to the one side link 41, and the two side links 43 are connected to the fixing frame 431. Two lower links 44 are hinged to both sides of the side link 41, respectively.

As shown in fig. 4 and 5, the two disks 52 of the furrow opener 5 are rotatably connected to the extension of the side link one 41 by a rotation shaft, and the side link one 41 is located between the two disks 52.

As shown in fig. 5 and 6, the extension section of the first side link 41 is hinged with a pinch roller frame 411, the pinch roller frame 411 is located below the lower link 44 and can abut against the lower link 44, and the pinch roller 6 is rotatably connected to the pinch roller frame 411.

As shown in fig. 5 and 6, an L-shaped connecting frame 412 is connected to the extension section of the first side link 41 and below the pressing wheel frame 411, and a pressing wheel spring 413 is connected between the connecting frame 412 and the pressing wheel frame 411.

As shown in fig. 5 and 6, an L-shaped locking rod 45 is hinged on the extension section of the first side link 41 below the connecting frame 412, and two locking rods 45 are provided and located at two ends of the first side link 41. A lock lever spring 451 is connected between the lock lever 45 and the link 412. The lock levers 45 can rotate along their hinge shafts, and the upper ends of the two lock levers 45 can be respectively abutted against the ends of the two lower connecting rods 44.

As shown in fig. 5 and 6, a first locking tooth 452 is provided at the upper portion of the locking lever 45 near the lower link 44, and a second locking tooth 441 engaged with the first locking tooth 452 is provided at the end of the lower link 44. After the locking rod 45 rotates upwards along the hinge axis, the first locking tooth 452 and the second locking tooth 441 are meshed, so that the lower connecting rod 44 is not moved any more, and the profile modeling frame 4 is locked. After the locking rod 45 rotates downwards along the hinge axis, the first locking tooth 452 and the second locking tooth 441 are separated, the locking of the profiling frame 4 is released, the profiling frame 4 can float, the furrow opener 5 and the pressing wheel 6 can also float, the change of the topography of the cultivated land is convenient to adapt, and the sowing depth is consistent.

As shown in fig. 5 and 6, a mounting plate 454 is mounted on the end of the two locking levers 45 opposite to the first locking tooth 452, a material-shifting damper 453 is mounted on the lower end of the mounting plate 454, and the material-shifting damper 453 is located between the pressing wheel 6 and the furrow opener 5. As shown in fig. 7, the kick-out plate 453 is V-shaped, and the kick-out plate 453 is gradually inclined downward from one end near the furrow opener 5 to one end near the press wheel 6. The lower end of the kick-out damper 453 is higher than the lower end of the press end.

As shown in fig. 5 and 6, the stirring baffle 453 can stir out soil blocks in soil, so that the influence of the soil blocks on the close contact between seeds and the soil is reduced, the seeds can absorb moisture in the soil, and the emergence rate is improved.

As shown in fig. 5 and 6, since the locking lever 45 is hinged to the first side link 41, when the soil block is large, the end of the material pulling baffle 453 near the furrow opener 5 contacts the soil block, and as the frame 1 advances, the material pulling baffle 453 overcomes the elastic force of the locking lever spring 451 and rotates upwards, so that the locking lever 45 rotates synchronously, the upper part of the locking lever 45 rotates in a direction near the lower link 44, so that the first locking tooth 452 on the locking lever 45 is meshed with the second locking tooth 441 on the lower link 44, and the profile modeling frame 4 is locked, and the furrow opener 5 does not float upwards. Meanwhile, along with the movement of the frame 1, under the action of the elasticity of the pinch roller springs 413, the pressing wheel 6 can pass over the soil blocks, and the auxiliary pressing wheel 6 compacts or crushes the soil blocks when rolling the soil blocks, and the position of the furrow opener 5 is unchanged in the process, so that the influence of the floating of the upper and lower positions of the furrow opener 5 on the furrowing depth in a short time can be reduced, and the depth consistency of seed sowing is facilitated.

As shown in fig. 5 and 6, a connecting member 46 is installed at a portion where the upper link 42 and the first side link 41 are hinged, and the connecting member 46 has a plate shape. The connecting piece 46 is provided with a plurality of connecting holes 461, and a profiling spring 462 is connected between the connecting holes 461 and the lower connecting rod 44. The spring force of the pinch roller spring 413 is greater than the spring force of the profile spring 462.

As shown in fig. 5, the profiling spring 462 can divide the quadrangular profiling frame 4 into a triangle structure, that is, the triangle structure is formed among the profiling spring 462, the lower connecting rod 44 and the side connecting rods, and the profiling spring 462 can be elastically deformed under the action of pressure or tension, so that the stability of the pressing wheel 6 is maintained, and good pressing performance is achieved.

As shown in fig. 5 and 6, when the profiling frame 4 drives the pressing wheel 6 and the furrow opener 5 to adapt to different terrains, the elastic force of the profiling spring 462 can enable the pressing wheel 6 and the furrow opener 5 to float, when a larger soil block is encountered, the first locking tooth 452 is meshed with the second locking tooth 441, the profiling frame 4 is locked, the profiling spring 462 is fixed, and when the pressing wheel 6 rolls the soil block, the pressing wheel 6 can float and roll the soil block under the elastic action of the pressing wheel spring 413.

As shown in fig. 5 and 6, the connecting member 46 is provided with a plurality of connecting holes 461, and the profiling spring 462 can be connected with one of the connecting holes 461 and the lower connecting rod 132, so that the magnitude of the elastic coefficient of the profiling spring 462 can be adjusted. The larger the elastic coefficient is, the stronger the compacting effect can be provided by the compacting wheel 6, but the buffering effect is relatively poor. The smaller the elastic coefficient is, the better the buffering effect can be provided by the compacting wheel 6, but the weaker the compacting effect is.

As shown in fig. 4 and 5, the inverted U-shaped scraping plate 47 is mounted on the pressing wheel frame 411, two ends of the scraping plate 47 can be respectively abutted against two discs 52 of the furrow opener 5, and the scraping plate 47 can scrape off soil on two sides of the furrow opener 5, so that influence of soil adhered on the furrow opener 5 on the width and depth of furrows is reduced, and meanwhile, resistance of travelling of the furrow opener 5 is reduced.

As shown in fig. 4 and 5, the earth covering rods 48 are mounted on both sides of the pressing wheel 6 on the pressing wheel frame 411, and one end of the earth covering rods 48, which is far away from the pressing wheel frame 411, is V-shaped. After the seeds are compacted by the compacting wheel 6, the soil covering rod 48 can stir the soil, which is beneficial to covering the seeds by the soil, thereby being beneficial to keeping the moisture and the nutrients of the soil and improving the germination rate of the seeds.

As shown in fig. 4 and 5, the part of the earthing rod 48 close to the pressing wheel 6 is spirally wound, so that the earthing rod 48 can generate certain floating, and is convenient for adapting to different terrains.

As shown in fig. 1, a power wheel 13 is rotatably connected to one side of the frame 1 located on the seed bin 7, and a seed metering device (not shown in the drawing) is rotatably connected to the seed bin 7, and the seed metering device is a commonly used seed metering device in the market, and the structure thereof is not described in detail. The rotation of the seed metering device is driven by a power wheel 13. The rotating shaft of the power wheel 13 and the rotating shaft of the seed sowing device are respectively provided with a ball joint 131, and a connecting rod is connected between the two ball joints 131. The travelling of the frame 1 drives the power wheel 13 to rotate, and the connecting rod drives the seed sowing device to rotate, so that seed sowing is realized.

As shown in fig. 5, the furrow opener 5 is provided with a blanking pipe 51. After the compacting roller 3 is compacted, the furrow opener 5 is used for ditching, seeds in the seed bin 7 fall through the blanking pipe 51, the compacting wheel 6 is used for compacting the seeds, and the soil covering rod 48 is used for poking soil to cover the seeds, so that the sowing operation is completed.

The implementation principle of the agricultural seeder of the embodiment:

the tractor pulls the frame 1 to advance, and rotary tillage roller 2 and roller 3 rotate, and rotary tillage sword 21 on the rotary tillage roller 2 carries out the rotary tillage to the cultivated land, provides good condition for seeding and crop growth, field management.

The press roller 3 drives the fertilizer distributor to rotate through the chain, so that fertilizer in the fertilizer bin 8 falls down and falls between the rotary tillage roller 2 and the press roller 3 through the lower fertilizer pipe 11, the press roller 3 presses so as to reduce loss of fertilizer along with moisture, and simultaneously, the sowed seeds can be closely contacted with soil, thereby being beneficial to improving the germination rate of the seeds.

The furrow opener 5 ditches, and the seed in the seed bin 7 falls, and the compacting wheel 6 is used for compacting the seed, so that the seed is inlaid in the soil, and the tight joint degree of the seed and the soil is increased.

Because furrow opener 5 and press wheel 6 are installed on profile modeling frame 4, press wheel 6, furrow opener 5 and profile modeling frame 4 can float, are convenient for adapt to the change of arable land topography.

The stirring baffle 453 can stir out soil blocks in soil, so that the influence of the soil blocks on the close contact of seeds and soil is reduced.

When the soil block is bigger, the end of the material shifting baffle 453, which is close to the furrow opener 5, is in contact with the soil block, along with the advancing of the frame 1, the material shifting baffle 453 overcomes the elastic force of the locking rod spring 451 and rotates upwards, so that the locking rod 45 rotates synchronously, the upper part of the locking rod 45 rotates towards the direction close to the lower connecting rod 44, the first locking tooth 452 on the locking rod 45 is meshed with the second locking tooth 441 on the lower connecting rod 44, the profiling frame 4 is locked, and the furrow opener 5 cannot float upwards. Meanwhile, along with the movement of the frame 1, under the action of the elasticity of the pinch roller springs 413, the pressing wheel 6 can pass over the soil blocks, and the auxiliary pressing wheel 6 compacts or crushes the soil blocks when rolling the soil blocks, and the position of the furrow opener 5 is unchanged in the process, so that the influence of the floating of the upper and lower positions of the furrow opener 5 on the furrowing depth in a short time can be reduced, and the depth consistency of seed sowing is facilitated.

After the seeds are compacted by the compacting wheel 6, the soil covering rod 48 can stir the soil, which is helpful for covering the seeds by the soil and completing the sowing operation.

In addition, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements.

Claims (10)

1. An agricultural seeder comprises a profiling frame (4) arranged on a frame (1), a furrow opener (5) and a pressing wheel (6) which are connected to the profiling frame (4), and is characterized in that the profiling frame (4) is a four-bar mechanism and is provided with a lower connecting bar (44) and a side connecting bar I (41), the furrow opener (5) is rotationally connected to the side connecting bar I (41), a pressing wheel frame (411) which can be abutted to the lower connecting bar (44) is hinged to the side connecting bar I (41), the pressing wheel (6) is rotationally connected to the pressing wheel frame (411), and a pressing wheel spring (413) is connected between the pressing wheel frame (411) and the side connecting bar I (41);

The side connecting rod I (41) is hinged with an L-shaped locking rod (45), a locking rod spring (451) is connected between the locking rod (45) and the side connecting rod I (41), a first locking tooth (452) is arranged on the upper portion of the locking rod (45) and close to the lower connecting rod (44), a second locking tooth (441) meshed with the first locking tooth (452) is arranged at the end portion of the lower connecting rod (44), a stirring baffle (453) is connected with the end portion of the locking rod (45), and the stirring baffle (453) gradually inclines downwards from one end close to the furrow opener (5) to one end close to the pressing wheel (6).

2. The agricultural seeder of claim 1, wherein the profiling frame (4) further comprises an upper connecting rod (42), a connecting piece (46) is arranged at the hinged part of the upper connecting rod (42) and the first side connecting rod (41), a plurality of connecting holes (461) are formed in the connecting piece (46), a profiling spring (462) is connected between the connecting holes (461) and the lower connecting rod (44), and the elastic force of the pressing spring (413) is larger than that of the profiling spring (462).

3. The agricultural seeder as set forth in claim 2, wherein the frame (411) is provided with a reversed U-shaped scraper (47), and the scraper (47) can scrape soil on both sides of the furrow opener (5).

4. The agricultural seeder of claim 3, wherein the soil covering rods (48) are arranged on the two sides of the pressing wheel (6) on the pressing wheel frame (411), one ends of the soil covering rods (48) far away from the pressing wheel frame (411) are in a V shape, and the parts of the soil covering rods (48) close to the pressing wheel (6) are spirally coiled.

5. The agricultural seeder as set forth in claim 4, wherein the profiling frame (4) further comprises a second side connecting rod (43) hinged with the upper connecting rod (42) and the lower connecting rod (44), a fixing frame (431) is connected to the second side connecting rod (43), and the fixing frame (431) is connected with the frame (1).

6. The agricultural seeder of claim 5, wherein the rotary tillage roller (2) is rotatably connected to the frame (1), a plurality of rotary tillage blades (21) are arranged on the rotary tillage roller (2), and the pressing roller (3) is rotatably arranged on one side of the rotary tillage roller (2) on the frame (1).

7. The agricultural seeder as claimed in claim 6, characterized in that a plurality of roller thorns (31) are provided at intervals on the peripheral side of the compacting roller (3).

8. The agricultural seeder of claim 7, wherein a fertilizer bin (8) is arranged above the rotary tillage roller (2) on the frame (1), a lower fertilizer pipe (11) is obliquely arranged below the fertilizer bin (8), and a pipe orifice of the lower fertilizer pipe (11) is arranged between the rotary tillage roller (2) and the compacting roller (3).

9. The agricultural seeder as set forth in claim 8, wherein a seed bin (7) is provided above the compacting roller (3), and a blanking pipe (51) is provided on the furrow opener (5).

10. The agricultural seeder according to claim 9, characterized in that a soil covering plate (14) is hinged on the frame (1) between the pressing roller (3) and the lower fertilizer pipe (11).