Agricultural sowing device with adjustable sowing row spacing

Abstract

The present invention provides an agricultural sowing device with adjustable sowing row spacing, which relates to the technical field of agricultural sowing. The agricultural sowing device includes a front frame, a sowing rotary frame, a plurality of point sowing components and a spacing adjustment component. The upper rod shaft is equipped with an adjusting cylinder to drive the rotating frame to rotate. The plurality of point sowing components are linearly and evenly spaced, the middle component is fixed, and the rest are slidable. The spacing adjustment component includes an adjusting motor, a plurality of pairs of adjusting columns and a spacing rod. The motor drives the columns to rotate synchronously, and the adjacent spacing rods are linked by meshing gears and movable nodes to achieve synchronous proportional adjustment of the spacing between the sowing components. The present invention controls the sowing depth by a cylinder, and the motor drives the mechanical linkage mechanism to accurately adjust the row spacing to meet the sowing needs of different crops. It solves the problems of fixed row spacing and cumbersome adjustment of traditional sowing devices, significantly improves sowing efficiency and adaptability, and is particularly suitable for multi-variety rotation or precision agriculture scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural sowing, in particular to an agricultural sowing device with adjustable sowing row spacing. Background Art

[0002] When producing crops, it is generally necessary to sow the seeds first, followed by a series of cultivation before harvesting. When sowing the seeds, in order to reasonably control the planting density of the seeds and provide them with a suitable growth environment, the seeds need to be sown as evenly as possible. Different crop seeds require different sowing densities, so the sowing device needs to adjust the sowing row spacing according to the type of crop.

[0003] Traditional agricultural seeding systems typically have fixed row spacing, making them difficult to adapt to the spacing requirements of different crops or planting patterns. For example, crops like wheat and corn have widely varying row spacing requirements, requiring existing equipment to replace components or perform manual adjustments, resulting in low efficiency and limited precision. Some adjustable row spacing devices utilize hydraulic or screw adjustment, which are complex and costly. Furthermore, they struggle to ensure simultaneous and equidistant spacing across multiple rows, which can lead to uneven seeding. Summary of the Invention

[0004] The object of the present invention is to provide an agricultural sowing device with adjustable sowing row spacing to solve the technical problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An agricultural sowing device with adjustable sowing row spacing comprises a front frame for being detachably fixed to a walking machine body, a plurality of point sowing assemblies for sowing into the soil and a spacing adjustment assembly for adjusting the spacing between the plurality of point sowing assemblies, the front side portion of the front frame having a mounting rod shaft portion and a sowing rotary frame rotatably arranged on the mounting rod shaft portion; the front frame also has an upper rod shaft and the upper rod shaft is provided with an adjusting cylinder with at least one telescopic end connected to the sowing rotary frame, the adjusting cylinder being used to drive the sowing rotary frame to rotate around the connection between the sowing rotary frame and the mounting rod shaft portion; a plurality of point sowing assemblies are arranged on the sowing rotary frame in a linearly equidistantly distributed manner; the point sowing assembly located in the middle is connected to the sowing rotary frame The rotating frame is fixedly connected, and the remaining point-type sowing components are slidably connected to the sowing rotating frame. The point-type sowing components guide seeds into the soil in a rotating insertion manner to achieve sowing; the spacing adjustment component includes an adjusting motor and multiple pairs of adjusting rotating columns, each pair of adjusting rotating columns is rotatably arranged on the corresponding point-type sowing component, each adjusting rotating column is provided with a spacing rod and a spacing gear, the spacing gears on the same point-type sowing component are meshed with each other, and the ends of the two spacing rods on the two adjacent point-type sowing components are rotatably connected through a movable node, the adjusting motor is arranged on the point-type sowing component fixed on the sowing rotating frame, and the output end of the adjusting motor is connected to one of the adjusting rotating columns.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional solution: the sowing rotating frame includes a front support rod and a rear sleeve portion, the front support rod is connected to the sowing parts of multiple point-type sowing assemblies, the rear sleeve portion is rotatably sleeved on the mounting rod shaft portion, an upper connecting rod is provided on the rear sleeve portion, and the upper connecting rod is movably connected to the telescopic end of the adjusting cylinder; both ends of the rear sleeve portion and the two ends of the front support rod are fixedly connected by side support arms, and the tail of the point-type sowing assembly is connected to the rear sleeve portion.

[0009] In an optional scheme: the point-type sowing assembly includes a sowing frame, a seed box, a disc material guide shell and multiple cone seeding units. The disc material guide shell located in the middle of the point-type sowing assembly is fastened together with the sowing rotating frame, and the remaining disc material guide shells can be slidably arranged on the front support rod. The cone seeding unit is rollingly arranged on the outer peripheral wall of the disc material guide shell and the cone seeding unit is connected to the interior of the disc material guide shell. One end of the sowing frame is connected to the rear sleeve part, and the other end is connected to the disc material guide shell. The seed box is arranged on the sowing frame and the seed box is connected to the interior of the disc material guide shell through a seed feeding unit. The seed feeding unit is used to transport seeds to the interior of the disc material guide shell. When the cone seeding unit rotates and is inserted into the soil, the cone seeding unit can open and guide the seeds into the soil.

[0010] In an optional scheme: the cone seeding unit is composed of two semi-conical cylinder parts that are clamped together, and the disc-type material guide shell includes a disc panel, an intermediate guide cylinder part, a circumferential plate surface and an opening and closing function part, the intermediate guide cylinder part is arranged on the front support rod, the disc panels are two and relatively fixed on the intermediate guide cylinder part, the circumferential plate surface is arranged on the edges of the two disc panels and rotatably cooperates therewith, and multiple cone seeding units are evenly distributed circumferentially on the outer wall of the circumferential plate surface, the outer surface of the disc panel is also provided with an opening and closing function part and multiple semi-conical cylinder parts are connected to the opening and closing function part, when the cone seeding unit is just inserted into the soil, the opening and closing function part can act on the semi-conical cylinder part to make the two semi-conical cylinder parts clamped together unfold; when the cone seeding unit is separated from the soil, the two semi-conical cylinder parts are automatically clamped under the action of the opening and closing function part, and the disc panel is also provided with a seed entry hole connected to the end of the seed feeding unit away from the seed box.

[0011] In an optional scheme: the semi-conical cylinder part has an opening and closing arm on the outer wall of the end close to the circumferential plate surface, the opening and closing arm is rotatably connected to the side of the circumferential plate surface through an opening and closing support, and there is a spring bearing between the opening and closing support and the opening and closing arm, and the opening and closing arm is also provided with an opening and closing extension roller extending toward the center of the disk panel; the opening and closing action part is a circular ring part, the opening and closing extension roller is abutted against the edge of the opening and closing action part, and the arc bottom of the opening and closing action part has an expanded arc groove.

[0012] In an optional solution: an elliptical blocking portion is further provided inside the disc-type material guide shell and the elliptical blocking portion is located at the bottom of the arc inside the cone seeding unit, the end of the elliptical blocking portion is fixedly connected to the inner wall of the disc panel, and the lower surface of the elliptical blocking portion is in contact with the inner wall of the circumferential plate surface; when the cone seeding unit is inserted into the soil, the cone seeding unit is located on the lower side of the elliptical blocking portion.

[0013] In an optional solution: the interior of the elliptical blocking portion is hollow and an air hole portion is opened at the bottom of the arc, the air hole portion corresponds to the expanded arc groove, a micro blower is provided on the end face of the disk panel and the air outlet end of the micro blower is connected to the elliptical blocking portion.

[0014] In an optional scheme: the bottom of the seed box has a bottom cavity, and the seed feeding unit includes a seed introduction tube, a seed discharging shaft and a rebound action unit. The seed introduction tube is arranged at the lower side of the seed box, one end of the seed introduction tube is connected to the interior of the disc guide shell, and the other end of the seed introduction tube has a straight seed discharging cylinder and the straight seed discharging cylinder is connected to the bottom wall of the bottom cavity. The seed discharging shaft is rotatably arranged inside the seed box, and the bottom of the seed discharging shaft extends to the interior of the straight seed discharging cylinder and is provided with a seed discharging auger blade; one end of the rebound action unit can slide through the side wall of the seed box and be connected to the seed discharging shaft, and the other end extends to the lower side of the sowing frame. When the cone seeding unit passes the lower side of the sowing frame, the end of the cone seeding unit can act on the rebound action unit to make it move toward the seed box, and the rebound action unit is connected to the outer wall of the seed box by a seed discharging spring; the rebound action unit in a moving state acts on the seed discharging shaft to make it rotate.

[0015] In an optional solution: the rebound action unit includes a seeding gear, a seeding rack and a seeding movable frame, the seeding gear is connected to the seeding shaft through a one-way ratchet, the seeding rack passes through the side wall of the seed box and meshes with the seeding gear, the seeding movable frame is arranged on the seeding rack and extends to the end of the outside of the seed box and meshes with it, the seeding movable frame is connected to the seeding box through a seeding spring, and one end of the seeding movable frame extends to the lower side of the sowing frame and is provided with a seeding roller.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] In the agricultural sowing device with adjustable sowing row spacing provided by the present invention, the linkage mechanism of the adjusting rotating column and the distance adjusting rod is driven by a motor to realize synchronous proportional adjustment of the spacing between multiple rows of sowing components, ensuring that the adjacent row spacings are consistent and adapting to different crop planting standards; a mechanical linkage method of gear meshing and movable nodes is adopted to replace complex hydraulic or screw systems, reducing manufacturing costs and facilitating maintenance; the adjusting cylinder independently controls the inclination angle of the sowing rotating frame to realize rapid adjustment of the insertion depth of the point sowing component into the soil, adapting to different seed covering requirements; the rotary sowing design is combined with the continuous movement of the walking body to realize continuous and uniform sowing, thereby improving work efficiency; the front frame can be adapted to a variety of walking bodies (such as tractors and plows), and the modular design facilitates disassembly and assembly and expands application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1This is a schematic structural diagram of the agricultural sowing device in one embodiment of the present invention.

[0020] Figure 2 The figure is a schematic diagram of the arrangement structure of the point seeding assembly in one embodiment of the present invention.

[0021] Figure 3 Schematic diagram of the structure of a point-type seeding component in one embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the spacing adjustment component structure in one embodiment of the present invention.

[0023] Figure 5 Schematic diagram of the structure of the disc-type material guide shell and the cone seeding unit in one embodiment of the present invention.

[0024] Figure 6 Schematic diagram of the structure of a disc-type material guide housing in one embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of a disc-type material guiding shell in one embodiment of the present invention.

[0026] Figure 8 Schematic diagram of the cone seeding unit structure in one embodiment of the present invention.

[0027] Figure 9 Schematic diagram of the structure of the seed delivery unit in one embodiment of the present invention.

[0028] Figure numerals: front frame 100, mounting rod shaft 110, upper rod shaft 120, sowing rotary frame 200, front support rod 210, side arm 220, rear sleeve 230, upper connecting rod 240, point sowing assembly 300, sowing frame 310, seed box 320, bottom cavity 321, disc-type material guide shell 330, disc panel 331, middle guide cylinder 332, circumferential plate surface 333, opening and closing function part 334, expansion arc groove 335, seeding hole 336, cone seeding unit 340, semi-conical cylinder 341, opening and closing support 3 42 opening and closing support arm 343, opening and closing extension roller 344, seed feeding unit 350, seed introduction tube 351, straight seeding cylinder 352, seeding shaft 353, seeding auger blade 354, seeding gear 355, seeding rack 356, seeding movable frame 357, seeding roller body 358, micro blower 360, elliptical blocking part 370, air hole part 371, seeding spring 380, spacing adjustment component 400, adjustment motor 410, adjustment column 420, pitch adjustment rod 430, movable node 440, pitch adjustment gear 450, adjustment cylinder 500. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The left, right, up, and down positions of the components shown in the accompanying drawings are merely one arrangement, and the specific positions are set according to specific needs.

[0031] In one embodiment, Figures 1-4 As shown, an agricultural sowing device with adjustable sowing row spacing includes a front frame 100 for being detachably fixed to a walking machine body, a plurality of point sowing assemblies 300 for sowing into the soil, and a spacing adjustment assembly 400 for adjusting the spacing between the plurality of point sowing assemblies 300, the front side of the front frame 100 has a mounting rod shaft portion 110 and a sowing rotary frame 200 rotatably arranged on the mounting rod shaft portion 110; the front frame 100 also has an upper rod shaft 120 and the upper rod shaft 120 is provided with an adjusting cylinder 500 with at least one telescopic end connected to the sowing rotary frame 200, the adjusting cylinder 500 is used to drive the sowing rotary frame 200 to rotate around the connection between it and the mounting rod shaft portion 110; a plurality of point sowing assemblies 300 are arranged on the sowing rotary frame 200 in a linearly equidistantly distributed manner; the point sowing assembly 300 located in the middle is connected to the sowing rotary frame 200 is fixedly connected, and the remaining point sowing components 300 are slidably connected to the sowing rotary frame 200. The point sowing component 300 introduces the seeds into the soil by rotating and inserting to achieve sowing; the spacing adjustment component 400 includes an adjusting motor 410 and multiple pairs of adjusting columns 420, each pair of adjusting columns 420 is rotatably arranged on the corresponding point sowing component 300, and each adjusting column 420 is provided with a distance adjustment rod 430 and a distance adjustment gear 450. The distance adjustment gears 450 located on the same point sowing component 300 are engaged with each other, and the ends of the two distance adjustment rods 430 located on the two adjacent point sowing components 300 are rotatably connected through a movable node 440. The adjusting motor 410 is provided on the point sowing component 300 fixed on the sowing rotary frame 200 and the output end of the adjusting motor 410 is connected to one of the adjusting columns 420.

[0032] In the embodiment of the present invention, the front frame 100 can be detachably fixed to the front end of the walking body and the entire sowing device moves with the walking body. The walking body is not drawn in the accompanying drawings. It belongs to a conventional walking agricultural implement, such as the walking part of a tractor or the walking part of a plow, so it is not described here. After the entire sowing device is installed on the walking body, the adjustment cylinder 500 works and drives the sowing rotary frame 200 to rotate around the mounting rod shaft 110 through telescopic movement, and the point sowing assembly 300 rotates with the sowing rotary frame 200. The point sowing assembly 300 The bottom is inserted into the soil, and when the entire sowing device moves with the walking body, the point sowing component 300 will rotate, and each time it is inserted into the soil and seeds are introduced into it, so as to realize automatic sowing; secondly, when it is necessary to change the sowing row spacing according to the seed type and its sowing requirements, the adjustment motor 410 works and drives the adjustment column 420 connected to its output end to rotate. The two adjustment columns 420 on the same point sowing component 300 are rotated synchronously and in opposite directions through the engagement of the two spacing gears 450, and the adjustment column 420 drives the spacing rod 430 The ends of the two distance-adjusting rods 430 on the two adjacent point-type sowing assemblies 300 are connected by a movable node 440. Therefore, the distance-adjusting rod 430 rotates and can pull or push the distance-adjusting rod 430 connected thereto to move through the movable node 440. Since the point-type sowing assembly 300 can slide on the sowing rotating frame 200, the distance between the two connected point-type sowing assemblies 300 can be adjusted by changing the angle of the distance-adjusting rod 430. The two connected distance-adjusting rods 430 rotate synchronously with the adjustment column 420 connected thereto, so multiple point-type sowing assemblies 300 can be sown at the same time. The adjusting columns 420 on the seeding assemblies 300 all rotate synchronously to achieve synchronous adjustment of the spacing between multiple point seeding assemblies 300, so as to ensure that the spacing between two adjacent point seeding assemblies 300 always remains the same after adjustment, thereby adapting to various seeding spacing requirements; wherein, the adjusting motor 410 has a built-in braking system. When it stops working, the braking system limits the rotational freedom of its output end, thereby limiting the sliding of the point seeding assemblies 300 on the seeding rotating frame 200, thereby preventing the point seeding assemblies 300 from changing the spacing due to external factors during seeding.

[0033] In one embodiment, Figure 1-3As shown, the sowing rotating frame 200 includes a front support rod 210 and a rear sleeve portion 230, the front support rod 210 is connected to the sowing parts of multiple point sowing assemblies 300, the rear sleeve portion 230 is rotatably sleeved on the mounting rod shaft portion 110, and an upper connecting rod 240 is provided on the rear sleeve portion 230, and the upper connecting rod 240 is movably connected to the telescopic end of the adjusting cylinder 500; both ends of the rear sleeve portion 230 and the two ends of the front support rod 210 are fixedly connected by the side support arms 220, and the tail of the point sowing assembly 300 is connected to the rear sleeve portion 230; in this embodiment of the present invention, the adjusting cylinder 500 pushes and pulls the upper rod shaft 120 through its own telescopic movement, and the upper rod shaft 120 is subjected to force to rotate the rear sleeve portion 230, and the rotating rear sleeve portion 230 rotates the front support rod 210 through the side support arms 220, and the multiple point sowing assemblies 300 follow the front support rod 210 to rotate so that their bottoms are inserted into the soil.

[0034] In one embodiment, Figure 1-3 As shown, the point seeding assembly 300 includes a seeding frame 310, a seed box 320, a disc-type material guide shell 330 and a plurality of cone seeding units 340. The disc-type material guide shell 330 in the middle of the point seeding assembly 300 is fastened to the seeding rotating frame 200, and the remaining disc-type material guide shells 330 can be slidably arranged on the front support rod 210. The cone seeding units 340 are rolled on the outer peripheral wall of the disc-type material guide shell 330 and the cone seeding units 340 are arranged on the outer peripheral wall of the disc-type material guide shell 330. 0 is connected to the inside of the disc guide housing 330, one end of the sowing frame 310 is connected to the rear sleeve portion 230, and the other end is connected to the disc guide housing 330. The seed box 320 is arranged on the sowing frame 310 and the seed box 320 is connected to the inside of the disc guide housing 330 through the seed feeding unit 350. The seed feeding unit 350 is used to transport seeds to the inside of the disc guide housing 330. When the cone seeding unit 340 rotates and inserts into the soil, the cone The seeding unit 340 can be opened and guide the seeds into the soil; in the embodiment of the present invention, the adjusting cylinder 500 adjusts the angle of the sowing rotating frame 200 so that the cone seeding unit 340 at the bottom of the arc of the disc material guide housing 330 is inserted into the soil. When the entire sowing device moves with the walking body, the cone seeding unit 340 at the bottom of the arc of the disc material guide housing 330 is inserted into the soil. Due to the obstruction of the soil, multiple cone seeding units 340 rotate around the outer peripheral wall of the disc material guide housing 330 and are inserted into the soil in turn. The seeds are stored in the seed box 320, and the seeds enter the disc material guide housing 330 under the transportation of the seed feeding unit 350. When the cone seeding unit 340 rotates to the bottom of the arc of the disc material guide housing 330, the seeds inside the disc material guide housing 330 enter the cone seeding unit 340, and the cone seeding unit 340 guides them into the soil to achieve automatic sowing, and the sowing spacing is the same each time.

[0035] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 As shown, the cone seeding unit 340 is composed of two semi-conical cylinders 341 that are clamped together. The disc-type material guide shell 330 includes a disc panel 331, an intermediate guide cylinder portion 332, a circumferential plate surface 333 and an opening and closing function portion 334. The intermediate guide cylinder portion 332 is provided on the front support rod 210. The disc panels 331 are two and relatively fixed on the intermediate guide cylinder portion 332. The circumferential plate surface 333 is provided on the edge of the two disc panels 331 and rotates with them. Multiple cone seeding units The outer surface of the disk panel 331 is also provided with an opening and closing portion 334, and a plurality of semi-conical cylinders 341 are connected to the opening and closing portion 334. When the cone seeding unit 340 is just inserted into the soil, the opening and closing portion 334 can act on the semi-conical cylinders 341 so that the two semi-conical cylinders 341 stuck together are unfolded; when the cone seeding unit 340 is separated from the soil, the two semi-conical cylinders 341 are in the opening and closing position. The disc panel 331 is also provided with a seeding hole 336 connected to the end of the seed feeding unit 350 away from the seed box 320; in the embodiment of the present invention, the seed feeding unit 350 transports the seeds stored in the seed box 320 to the inside of the disc-type material guide shell 330 through the seeding hole 336, and when the cone seeding unit 340 is at the lower part of the disc-type material guide shell 330, the seeds in the disc-type material guide shell 330 will enter the inside of the cone seeding unit 340; the cone seeding unit 340 is on the upper side of the soil, and the two semi-conical cylinders 341 are in a locked state, so the seeds will not fall out of the cone seeding unit 340; when the cone seeding unit 340 is just inserted into the soil, the opening and closing part 334 acts on the two semi-conical cylinders 341 to expand them, so that the seeds inside the semi-conical cylinders 341 will fall into the soil. At the same time, the expansion of the two semi-conical cylinders 341 also supports the soil, so that a seeding groove is formed at the sowing position, which is convenient for subsequent watering and applying fertilizers.

[0036] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7As shown, the outer wall of the end of the semi-conical cylinder 341 close to the circumferential plate surface 333 is provided with an opening and closing support arm 343, and the opening and closing support arm 343 is rotatably connected to the side of the circumferential plate surface 333 through an opening and closing support 342. There is a spring bearing between the opening and closing support 342 and the opening and closing support arm 343. The opening and closing support arm 343 is also provided with an opening and closing extension roller 344 extending toward the center of the disk panel 331; the opening and closing function portion 334 is a circular ring portion, and the opening and closing extension roller 344 is provided. 4 abuts against the edge of the opening and closing action part 334, and the arc bottom of the opening and closing action part 334 has an expansion arc groove 335; in the embodiment of the present invention, the spring bearing is a component with a spring added between the inner ring and the outer ring of the bearing, so that the outer ring and the inner ring are subjected to elastic damping when they rotate relative to each other; when the cone seeding unit 340 is on the upper side of the soil, the opening and closing extension roller 344 is away from the expansion arc groove 335 and rolls against the opening and closing action part 334. Under the restriction of the edge of the opening and closing action part 334, the two semi-conical cylinders 341 always maintain a locked state. When the cone seeding unit 340 is in the lower half of the disc-type material guide shell 330, the seeds inside the disc-type material guide shell 330 will enter the cone seeding unit 340; when the cone seeding unit 340 is inserted into the soil, the opening and closing extension roller 344 moves into the expansion arc groove 335. At this time, due to the spring action in the spring bearing and the lack of the restriction of the edge of the opening and closing action part 334, the opening and closing support The arm 343 rotates, and the two semi-conical cylinders 341 unfold and push away the soil, so that the seeds inside the cone seeding unit 340 fall into the soil; when the cone seeding unit 340 is separated from the soil, the opening and closing extension roller 344 is misaligned with the unfolding arc groove 335 and rests on the opening and closing action part 334 again, and the opening and closing action part 334 rotates and drives the two semi-conical cylinders 341 to engage through the opening and closing support arm 343 to prevent the seeds from falling off from the cone seeding unit 340.

[0037] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7As shown, the disc-type material guide shell 330 is further provided with an elliptical blocking portion 370, and the elliptical blocking portion 370 is located at the arc bottom inside the cone seeding unit 340, the end of the elliptical blocking portion 370 is fixedly connected to the inner wall of the disc panel 331, and the lower surface of the elliptical blocking portion 370 is in contact with the inner wall of the circumferential plate surface 333; when the cone seeding unit 340 is inserted into the soil, the cone seeding unit 340 is located on the lower side of the elliptical blocking portion 370; in this embodiment of the present invention, the cone seeding unit 340 is inserted To the inside of the soil, since the arc bottom of the cone seeding unit 340 contacts the inner wall of the circumferential plate surface 333, the elliptical blocking portion 370 can prevent the seeds inside the disc-type material guide shell 330 from continuing to enter the cone seeding unit 340, avoiding the seeds inside the cone seeding unit 340 from falling into the soil, and the seeds inside the cone seeding unit 340 continue to enter the soil through the cone seeding unit 340, which can effectively ensure that the number of seeds sown each time is the same, and avoid the number of seeds sown being affected by the moving speed of the entire sowing device.

[0038] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 As shown, the interior of the elliptical blocking portion 370 is hollow and an air hole portion 371 is provided at the bottom of the arc, the air hole portion 371 corresponds to the expanded arc groove 335, and a micro-blower 360 is provided on the end face of the disk panel 331, and the air outlet end of the micro-blower 360 is connected to the elliptical blocking portion 370; in this embodiment of the present invention, when the cone seeding unit 340 is inserted into the soil and communicates with the interior of the elliptical blocking portion 370 through the air hole portion 371, the micro-blower 360 starts to work and blows air into the interior of the elliptical blocking portion 370, and the air flow enters the expanded cone seeding unit 340 through the air hole portion 371. The air flow can take away the seeds inside the cone seeding unit 340, so that they can fully fall into the soil.

[0039] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, the bottom of the seed box 320 has a bottom cavity 321, and the seed feeding unit 350 includes a seed introduction tube 351, a seeding shaft 353 and a rebound action unit. The seed introduction tube 351 is arranged at the lower side of the seed box 320, and one end of the seed introduction tube 351 is connected to the inside of the disc-type material guide shell 330. The other end of the seed introduction tube 351 has a straight seeding barrel 352, and the straight seeding barrel 352 is connected to the bottom wall of the bottom cavity 321. The seeding shaft 353 is rotatably arranged inside the seed box 320, and the bottom of the seeding shaft 353 extends to the straight seeding barrel 352. The interior is provided with a seeding auger blade 354; one end of the rebound action unit can slide through the side wall of the seed box 320 and be connected to the seeding shaft 353, and the other end extends to the lower side of the seeding frame 310. When the cone seeding unit 340 passes the lower side of the seeding frame 310, the end of the cone seeding unit 340 can act on the rebound action unit to make it move toward the seed box 320. The rebound action unit is connected to the outer wall of the seed box 320 by a seeding spring 380; the rebound action unit in the moving state acts on the seeding shaft 353 to make it Rotation; In the embodiment of the present invention, before sowing, the staff can drive the seeding shaft 353 to rotate by screwing or motor driving, and the seeding auger blade 354 follows the rotation of the seeding shaft 353 and guides the seeds inside the bottom cavity 321 into the seeding auger blade 354, and the seeds are introduced into the disc-type material guide shell 330 through the seeding auger blade 354 and the introduction tube 351; and when sowing, the cone seeding unit 340 rotates around the center of the disc-type material guide shell 330, and each time it passes the lower side of the sowing frame 310, The seeds are introduced into the disc-type material guide shell 330 through the seeding auger blade 354 and the seeding tube 351, thereby realizing automatic quantitative feeding. After the cone seeding unit 340 passes through the rebound action unit, the rebound action unit is reset under the action of the seeding spring 380, and the seeding shaft 353 does not rotate, which can effectively avoid blockage and perform intermittent quantitative feeding.

[0040] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, the rebound action unit includes a seeding gear 355, a seeding rack 356 and a seeding movable frame 357. The seeding gear 355 is connected to the seeding shaft 353 through a one-way ratchet. The seeding rack 356 passes through the side wall of the seed box 320 and meshes with the seeding gear 355. The seeding movable frame 357 is provided at the end of the seeding rack 356 extending to the outside of the seed box 320. The seeding movable frame 357 is connected to the seed box 320 through a seeding spring 380. One end of the seeding movable frame 357 extends to the lower side of the sowing frame 310 and is provided with a seeding roller 358. In this embodiment of the present invention, when the cone seeding unit 340 rotates to the top of the arc of the disc guide shell 330 and continues to rotate, the cone seeding unit 340 outside The wall acts on the seeding roller 358 and pushes the seeding roller 358. The seeding roller 358 is subjected to force and drives the seeding movable frame 357 to overcome the elastic force of the seeding spring 380 to move toward the seeding box 320. The seeding rack 356 follows the seeding movable frame 357 to move and drives the seeding rotating shaft 353 to rotate through the seeding gear 355; when the cone seeding unit 340 passes the seeding roller 358, the seeding movable frame 357 and the seeding rack 356 move back and reset due to the elastic force of the seeding spring 380 to restore the deformation, and the seeding gear 355 rotates, but because the seeding gear 355 and the seeding rotating shaft 353 are connected by a one-way ratchet, the seeding rotating shaft 353 will not rotate, so the seeding auger blade 354 remains stable and will not feed.

[0041] The above embodiment provides an agricultural sowing device with adjustable sowing row spacing, and the working principle of sowing is as follows:

[0042] 1. Seeding Execution Mechanism

[0043] Device fixation and angle adjustment

[0044] The front frame 100 is installed at the front end of a walking machine such as a tractor or a plow through a detachable structure and moves with the machine.

[0045] The regulating cylinder 500 is extended to drive the sowing rotating frame 200 to rotate around the mounting rod shaft 110, driving the spot sowing assembly 300 to tilt as a whole, so that the bottom of the cone spot sowing unit 340 is inserted into the soil to a preset depth.

[0046] Seed delivery and quantitative placement

[0047] The seeds in the seed box 320 are transported to the inside of the disc-type material guide housing 330 through the seed transport unit 350:

[0048] Initially, the seed discharging shaft 353 can be driven to rotate manually or by a motor, driving the seed discharging auger blades 354 to introduce seeds from the bottom cavity 321 through the seed introduction tube 351 into the disc-type material guide housing 330.

[0049] During the sowing process, when the cone seeding unit 340 rotates to the top of the disc-type material guide shell 330, its outer wall pushes the seeding roller 358, and drives the seeding shaft 353 to rotate intermittently through the rebound action unit (seeding rack 356 → seeding gear 355 → one-way ratchet), thereby achieving quantitative intermittent feeding and avoiding blockage.

[0050] Soil insertion and seeding action

[0051] The cone seeding unit 340 is composed of two semi-conical cylinders 341 hinged by a spring bearing. Under normal conditions, the opening and closing extension roller 344 abuts against the opening and closing function part 334 to keep the cone seeding unit 340 closed.

[0052] When the device moves, the cone seeding unit 340 inserted into the soil slides into the expansion arc groove 335 due to the opening and closing extension roller 344, and the semi-conical cylinder 341 opens under the action of the spring bearing:

[0053] The elliptical blocking portion 370 blocks the seeds from continuing to enter, ensuring a constant single sowing amount.

[0054] The micro blower 360 blows air into the elliptical blocking portion 370, and the air flows through the air hole portion 371 to blow the seeds off, ensuring complete sowing.

[0055] The semi-conical cylinder 341 props up the soil to form a sowing groove, and the seeds fall into it accurately.

[0056] After the cone seeding unit 340 is separated from the soil, the opening and closing extension roller 344 returns to the edge of the opening and closing function portion 334, and the semi-conical cylinder 341 is closed again.

[0057] 2. Line Spacing Adjustment Mechanism

[0058] Adjustment trigger

[0059] By starting the adjustment motor 410 (with a built-in braking system), the adjustment rotating column 420 on the fixed-point sowing assembly 300 is driven to rotate.

[0060] Synchronous linkage adjustment

[0061] Each pair of adjusting rotating posts 420 rotates synchronously in opposite directions through the meshed pitch adjusting gears 450 , driving the pitch adjusting rod 430 to rotate.

[0062] The distance adjustment rods 430 of adjacent point-type sowing assemblies 300 are hinged through the movable node 440 to form a parallel four-bar linkage:

[0063] When the angle of the distance adjustment rod 430 changes, the slidingly connected point-type sowing assembly 300 is pushed or pulled to move along the front support rod 210 .

[0064] All the slidable point sowing components 300 are displaced synchronously and equidistantly to ensure that the row spacing is evenly adjusted.

[0065] After the adjustment is completed, the motor 410 is adjusted to brake and lock the rotating column 420 to prevent displacement during sowing.

[0066] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. An agricultural sowing device with adjustable sowing row spacing, comprising a front frame for detachably fixing to a walking body, a plurality of point sowing assemblies for sowing into the soil, and a spacing adjustment assembly for adjusting the spacing between the plurality of point sowing assemblies, characterized in that: The front side of the front frame body has a mounting rod shaft portion and a sowing rotating frame rotatably arranged on the mounting rod shaft portion; the front frame body also has an upper rod shaft, and the upper rod shaft is provided with at least one adjusting cylinder with a telescopic end connected to the sowing rotating frame, and the adjusting cylinder is used to drive the sowing rotating frame to rotate around the connection between it and the mounting rod shaft portion; A plurality of point-type sowing components are arranged on the sowing rotary frame in a linear and evenly spaced distribution manner; The point-type sowing assembly in the middle is fixedly connected to the sowing rotary frame, and the remaining point-type sowing assemblies are slidably connected to the sowing rotary frame. The point-type sowing assemblies guide the seeds into the soil by rotating and inserting them to achieve sowing; The spacing adjustment assembly includes an adjustment motor and multiple pairs of adjustment rotating columns; Each pair of adjusting rotating columns is rotatably mounted on the corresponding point-type sowing assembly. Each adjusting rotating column is provided with a pitch-adjusting rod and a pitch-adjusting gear. The pitch-adjusting gears on the same point-type sowing assembly are meshed with each other. The ends of the two pitch-adjusting rods on two adjacent point-type sowing assemblies are rotatably connected through a movable node. The regulating motor is provided on a point-type sowing assembly fixed on a sowing rotary frame, and an output end of the regulating motor is connected to one of the regulating rotating columns; The sowing rotary frame includes a front support rod and a rear sleeve portion; The front support rod is connected to the sowing parts of multiple point-type sowing assemblies, and the rear sleeve portion is rotatably sleeved on the shaft portion of the mounting rod. The rear sleeve portion is provided with an upper connecting rod and the upper connecting rod is movably connected to the telescopic end of the regulating cylinder; Both ends of the rear sleeve portion and both ends of the front support rod are fixedly connected through side arms, and the tail of the point seeding assembly is connected to the rear sleeve portion; The point seeding assembly includes a seeding frame, a seed box, a disc-type material guide housing and a plurality of cone seeding units; The disc-type material guide housing in the middle point-seeding assembly is fastened to the seeding rotating frame, and the remaining disc-type material guide housings are slidably mounted on the front support rod. The cone-type seeding unit is rollably mounted on the outer peripheral wall of the disc-type material guide housing and is in communication with the interior of the disc-type material guide housing. One end of the sowing frame is connected to the rear sleeve portion, and the other end is connected to the disc-type material guide housing. The seed box is arranged on the sowing frame and is connected to the inside of the disc-type material guide housing through a seed feeding unit. The seed feeding unit is used to transport seeds to the inside of the disc-type material guide housing. When the cone seeding unit is rotated and inserted into the soil, the cone seeding unit can open and guide the seeds into the soil; The cone seeding unit is composed of two semi-conical cylinders clamped together, and the disc-type material guide housing includes a disc panel, an intermediate guide cylinder part, a circumferential plate surface and an opening and closing function part; The intermediate guide cylinder portion is provided on the front support rod, the disc panels are two and relatively fixed on the intermediate guide cylinder portion, the circumferential plate surface is provided on the edge of the two disc panels and rotates with them, a plurality of cone seeding units are circumferentially and evenly distributed on the outer wall of the circumferential plate surface, the outer surface of the disc panel is further provided with an opening and closing function portion and a plurality of semi-conical cylinder members are connected to the opening and closing function portion; When the cone seeding unit is just inserted into the soil, the opening and closing portion can act on the semi-conical cylinders to make the two semi-conical cylinders that are stuck together unfold; When the cone seeding unit is separated from the soil, the two semi-conical cylinders are automatically locked together under the action of the opening and closing part. A seeding hole connected to the end of the seed feeding unit away from the seed box is also provided on the disk panel.

2. The agricultural sowing device with adjustable sowing row spacing according to claim 1, characterized in that: The outer wall of the end of the semi-conical cylinder close to the circumferential plate surface is provided with an opening and closing support arm, the opening and closing support arm is rotatably connected to the side of the circumferential plate surface through an opening and closing support seat, a spring bearing is provided between the opening and closing support seat and the opening and closing support arm, and the opening and closing support arm is also provided with an opening and closing extension roller extending toward the center of the disk panel; The opening and closing function part is a circular ring part, the opening and closing extension roller is in contact with the edge of the opening and closing function part, and the arc bottom of the opening and closing function part is provided with an expansion arc groove.

3. The agricultural sowing device with adjustable sowing row spacing according to claim 2, characterized in that: An elliptical blocking portion is further provided inside the disc-type material guiding housing, and the elliptical blocking portion is located at the arc bottom inside the cone seeding unit; The end of the elliptical blocking portion is fixedly connected to the inner wall of the disk panel, and the lower surface of the elliptical blocking portion contacts the inner wall of the circumferential plate surface; when the cone seeding unit is inserted into the soil, the cone seeding unit is located at the lower side of the elliptical blocking portion.

4. The agricultural sowing device with adjustable sowing row spacing according to claim 3, characterized in that: The elliptical blocking portion is hollow inside and has an air hole portion at the bottom of the arc, the air hole portion corresponds to the expanded arc slot, a micro blower is provided on the end surface of the disk panel and the air outlet of the micro blower is connected to the elliptical blocking portion.

5. The agricultural sowing device with adjustable sowing row spacing according to any one of claims 1 to 4, characterized in that: The bottom of the seed box has a bottom cavity, and the seed delivery unit includes a seed introduction tube, a seed delivery shaft and a rebound action unit; The seed introduction tube is arranged at the lower side of the seed material box, one end of the seed introduction tube is connected to the inside of the disc-type material guide shell, the other end of the seed introduction tube is provided with a straight seed discharging cylinder, and the straight seed discharging cylinder is connected to the bottom wall of the bottom cavity, the seed discharging shaft is rotatably arranged inside the seed material box, and the bottom of the seed discharging shaft extends to the inside of the straight seed discharging cylinder and is provided with a seed discharging auger blade; One end of the rebound action unit can slide through the side wall of the seed box and be connected to the seeding shaft, and the other end extends to the lower side of the sowing frame. When the cone seeding unit passes the lower side of the sowing frame, the end of the cone seeding unit can act on the rebound action unit to move it toward the seed box. The rebound action unit is connected to the outer wall of the seed box through a seeding spring. The rebound action unit in the moving state acts on the seeding shaft to cause it to rotate.

6. The agricultural sowing device with adjustable sowing row spacing according to claim 5, characterized in that: The rebound action unit includes a seeding gear, a seeding rack and a seeding movable frame; The seeding gear is connected to the seeding shaft through a one-way ratchet, and the seeding rack passes through the side wall of the seed box and meshes with the seeding gear. The seeding movable frame is arranged on the end of the seeding rack extending to the outside of the seed box, and the seeding movable frame is connected to the seed box through a seeding spring. One end of the seeding movable frame extends to the lower side of the sowing frame and is provided with a seeding roller.

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