Duckbill type hole seeder, seeding unit and whole machine

Abstract

The application discloses a duckbill type hill-drop planter, which comprises a supporting seat, a first duckbill main body and a second duckbill main body, the supporting seat is hingedly connected with the first duckbill main body and the second duckbill main body respectively, and the planter further comprises a first needle tube assembly and a second needle tube assembly; at least one first needle tube assembly is arranged in the first duckbill main body, and at least one second needle tube assembly is arranged in the second duckbill main body; the first needle tube assembly and the second needle tube assembly form an annular fertilization channel; during fertilization, the needle head is stretched out of the needle hole and is stuck into the soil to perform liquid fertilizer fertilization, and the fertilizer is more easily to reach the root system of seeds. The application further discloses a seeding machine, and a part of vibration can be balanced through the upper crank flywheel and the lower crank flywheel of the machine, the balance of the machine body is assisted to be adjusted, the seeding and fertilization operation is more stable, the power consumption of the seeding machine is reduced, and the seeding quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery, in particular to a duckbill type hill-drop planter, a seeding unit and a whole machine. BACKGROUND

[0002] The existing duckbill type hill-drop planter has a liquid fertilizer pipe fixed on the inner wall of the duckbill type hill-drop planter, and liquid fertilizer is sprayed out through a nozzle, as shown in FIG. 1, which at least causes the following problems: Figure 1

[0003] 1. Since the nozzle is fixed in the hill-drop planter hole, the fertilizer can only be sprayed on the surface of the soil, and the fertilizer cannot reach the seed roots.

[0004] 2. Due to the complex environment of uneven soil, the protruding soil blocks can block the fertilizer sprayed by the nozzle, causing the fertilizer to not reach the predetermined position.

[0005] 3. The commonly used single liquid fertilizer pipe limits the fertilizer application range and cannot comprehensively apply fertilizer around the seeds.

[0006] 4. Since the nozzle is fixed on the outer edge of the hole of the duckbill type hill-drop planter, the nozzle is easily blocked by the moist soil during the working process.

[0007] At the same time, when using the duckbill type hill-drop planter to sow and fertilize tuber seeds, due to their spherical characteristics and irregular shapes, the seeds have a large landing speed and are prone to bouncing, which causes deviation from the predetermined sowing position and makes it difficult to control the plant spacing and sowing depth.

[0008] Furthermore, in hilly areas and complex terrains with uneven ground, the vibration of the seeding machine during sowing is large, causing unstable sowing and fertilization. The constant adjustment of the balance of the seeding unit increases the power consumption of the seeding machine and reduces the sowing efficiency.

[0009] In summary, the existing duckbill type seeding machine cannot meet the sowing and fertilization requirements in hilly areas, resulting in poor sowing quality, poor fertilization effect, and affecting the yield. SUMMARY

[0010] Therefore, the present application provides a duckbill type hill-drop planter to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0011] To achieve the above-mentioned purpose, the present application provides a duckbill type hill-drop planter, which comprises a support seat, a first duckbill main body and a second duckbill main body, the support seat is hingedly connected with the first duckbill main body and the second duckbill main body, and further comprises a first needle tube assembly and a second needle tube assembly; at least one first needle tube assembly is arranged in the first duckbill main body, and at least one second needle tube assembly is arranged in the second duckbill main body, the first needle tube assembly and the second needle tube assembly form an annular fertilizer application channel; the first needle tube assembly comprises:​

[0012] An inner tube, an outer hard tube and a needle, the outer hard tube is sleeved on the outside of the inner tube, one end of the inner tube is connected to the fertilizer delivery tube, the other end of the inner tube is connected to the needle, and the end of the outer hard tube away from the fertilizer delivery tube is fixedly connected to the needle; a pinhole is set at the bottom end of the first duckbill body, and the pinhole is opposite to the needle. When fertilizing, the outer hard tube can drive the needle to extend out of the pinhole to fertilize.

[0013] Preferably, the first needle tube assembly also includes a first annular frame, a connecting ring and a half ring, the end of the outer hard tube close to the fertilizer delivery tube is connected to the connecting ring, the end of the outer hard tube away from the fertilizer delivery tube is slidingly connected to the half ring, the half ring is fixed on the inner wall of the first duckbill body, and the connecting ring is rotatably connected to the first annular frame.

[0014] Preferably, the first needle tube assembly further comprises a spring, which is sleeved on the outside of the outer hard tube, with one end of the spring abutting against the connecting ring and the other end of the spring abutting against the half ring.

[0015] Preferably, the first needle tube assembly also includes a fixing ring, a needle tube groove is opened on the inner wall of the first duckbill body, the fixing ring is fixed at one end of the needle tube groove, the inner tube passes through the fixing ring and can slide relative to the fixing ring, the spring is embedded in the needle tube groove, and the depth of the needle tube groove is less than the diameter of the spring.

[0016] Preferably, a first support plate extends horizontally outward from the top of the first duckbill body, and a second support plate extends horizontally outward from the top of the second duckbill body. The first needle tube assembly further includes a first pressing assembly, and the first pressing assembly includes:

[0017] The first buckle, the second buckle, the first press wire, the first slide rail and the first slider, the first buckle is fixed on the first support plate, the second buckle is fixed on the second support plate, the first slider cooperates with the first slide rail, the first slide rail is vertically arranged on the side of the first support plate close to the first duckbill body, one end of the first press wire is fixed on the second buckle, the other end of the first press wire passes through the first buckle and the bottom end of the first slide rail in sequence, and is connected to the bottom of the first slider, and the side of the first slider away from the first slide rail is rotatably connected to the first annular frame.

[0018] Preferably, it also includes a circular tube and a connecting tube, and the first needle tube assembly also includes an annular tube, the annular tube is arranged above the first annular frame, the circular tube is arranged above the annular tube, the circular tube is connected to the annular tube through the connecting tube, and the annular tube is connected to one end of the inner tube through the fertilizer delivery tube, and the fertilizer delivery tube is a telescopic fertilizer delivery tube.

[0019] Preferably, the support base is U-shaped, with first and second side plates extending upward from both sides of the first support plate, the first side plate being opposite to the second side plate, and the support base being inserted between the first and second side plates, and further comprising an opening and closing assembly, the opening and closing assembly comprising:

[0020] A first rotating axis, a second rotating axis, a first fixing member, a second fixing member and a tension spring, the support seat is hinged to the first duckbill body through the first rotating axis, the support seat is hinged to the second duckbill body through the second rotating axis, the first fixing member is fixed to the first side panel, the second fixing member is fixed to the side of the support seat close to the first side panel, one end of the tension spring is connected to one end of the first rotating axis close to the second side panel, the other end of the tension spring is connected to one end of the second rotating axis close to the second side panel, the height of the first fixing member in the vertical direction and the height of the second fixing member in the vertical direction are higher than the first rotating axis.

[0021] The present invention also discloses a sowing unit, comprising the above-mentioned duckbill type seed drill, a frame and a transmission assembly, wherein the transmission assembly is connected to the duckbill type seed drill, and the transmission assembly comprises:

[0022] A power input shaft, a crank flywheel shaft, an upper crank flywheel, a lower crank flywheel, a connecting rod and a sowing rocker arm; the power input shaft is arranged at the bottom end of the frame, the crank flywheel shaft is arranged at the top end of the frame, the power input shaft and the crank flywheel shaft are connected through a gear rack transmission, one end of the power input shaft is connected to one end of the lower crank flywheel, the other end of the lower crank flywheel is hinged to one end of the sowing rocker arm, the other end of the sowing rocker arm is connected to the support seat, one end of the upper crank flywheel is connected to the crank flywheel shaft, the other end of the upper crank flywheel is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the sowing rocker arm.

[0023] Preferably, it also includes a pull-wire rocker arm, a pull wire, a seed throwing bucket, and the pull-wire rocker arm is arranged at the top of the frame. A cam is arranged at the other end of the upper crank flywheel shaft, and the cam cooperates with the pull-wire rocker arm. One end of the pull-wire rocker arm is connected to the pull wire, and the other end of the pull wire passes through the second fixing piece and is connected to the first fixing piece. The seed throwing bucket is arranged on the support seat, and the outlet end of the seed throwing bucket is opposite to the annular fertilization channel.

[0024] The present invention also discloses a seeding machine, comprising at least two seeding units as described above arranged side by side, and also comprising a liquid fertilizer barrel and a liquid infusion main pipe. Every two adjacent seeding units are connected to one end of a liquid infusion main pipe, and the other end of the liquid infusion main pipe is connected to the liquid fertilizer barrel.

[0025] The advantages and beneficial effects of the duckbill type hole seeder of the present invention are:

[0026] During fertilization, the needle extends from the needle hole and penetrates the soil, making it easier for the fertilizer to reach the seed's root system. After fertilization is complete, the needle retracts into the duckbill body, preventing soil from clogging the hole. In the annular fertilization channel, the seeds collide or rub against the multiple external rigid tubes, slowing their descent and preventing them from bouncing when they reach their intended location on the ground, while also expanding the fertilization range.

[0027] 2. The upper crank flywheel and the lower crank flywheel of the whole machine can balance part of the vibration, auxiliary adjustment of the balance of the machine body, make the seeding and fertilizing operation more stable, reduce the power consumption of the seeder, and improve the seeding quality.

[0028] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein:

[0030] Figure 1 The duckbill type hole seeder of the prior art.

[0031] Figure 2 The duckbill type hole seeder of the prior art.

[0032] Figure 3 The duckbill type hole seeder of the prior art.

[0033] Figure 4 The duckbill type hole seeder of the prior art.

[0034] Figure 5 The duckbill type hole seeder of the prior art.

[0035] Figure 6 The duckbill type hole seeder of the prior art.

[0036] Figure 7 The duckbill type hole seeder of the prior art.

[0037] Figure 8 The duckbill type hole seeder of the prior art.

[0038] Figure 9 The duckbill type hole seeder of the prior art.

[0039] Figure 10 The duckbill type hole seeder of the prior art.

[0040] Figure 11 The duckbill type hole seeder of the prior art.

[0041] Figure 12 The duckbill type hole seeder of the prior art.

[0042] Wherein: 1-support base; 2-first duckbill body; 3-second duckbill body; 4-inner tube; 5-outer hard tube; 6-needle head; 7-needle hole; 8-first annular frame; 9-blocking block; 10-connecting ring; 11-half ring; 12-spring; 13-needle tube groove; 14-fixing ring; 15-first support plate; 16- First pressing assembly; 17-first buckle; 18-second buckle; 19-first pressing wire; 20-first slider ring; 21-first slide rail; 22-first slider; 23-second pressing assembly; 24-circular tube; 25-connecting tube; 26-first side plate; 27-second side plate; 28-first rotating shaft; 29-second rotating shaft; 30-first fixing member; 31-second fixing member; 32-tension spring; 33-frame; 34-power input shaft; 35-crank flywheel shaft; 36-upper crank flywheel; 37-lower crank flywheel; 38-connecting rod; 39-seeding rocker arm; 40-pull wire rocker arm; 41-pull wire; 42-seeding bucket; 43-liquid fertilizer barrel; 44-infusion main pipe; 45-telescopic fertilizer pipe, 46-first needle tube assembly; 47-second needle tube assembly. DETAILED DESCRIPTION

[0043] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0044] like Figures 2 to 9 As shown, a duckbill type seed drill according to an embodiment of the present invention includes a support base 1, a first duckbill body 2, and a second duckbill body 3. The support base 1 is hinged to the first duckbill body 2 and the second duckbill body 3 respectively, and also includes a first needle tube assembly 46 and a second needle tube assembly 47. At least one first needle tube assembly 46 is provided in the first duckbill body 2, and at least one second needle tube assembly is provided in the second duckbill body 3. The first needle tube assembly 46 and the second needle tube assembly 47 form an annular fertilization channel. The first needle tube assembly 46 includes:

[0045] An inner tube 4, an outer hard tube 5 and a needle 6, the outer hard tube 5 is sleeved on the outside of the inner tube 4, one end of the inner tube 4 is connected to the fertilizer delivery tube, the other end of the inner tube 4 is connected to the needle 6, and the end of the outer hard tube 5 away from the fertilizer delivery tube is fixedly connected to the needle 6; a pinhole 7 is provided at the bottom end of the first duckbill body 2, and the pinhole 7 is opposite to the needle 6. When fertilizing, the outer hard tube 5 can drive the needle 6 to extend from the pinhole 7 to fertilize.

[0046] As a preferred embodiment, the outer hard tube is three, annularly surrounding the inner wall of the first duckbill body 2, when the first needle tube assembly 46 and the second needle tube assembly 47 constitute an annular fertilization channel, which can comprehensively fertilize around the seeds, and the fertilization range is large.

[0047] Optionally, the outer surface of the outer hard tube 5 is a rough surface.

[0048] The inner tube 4 is a soft tube for connecting the liquid fertilizer barrel 43 to deliver fertilizer to the needle 6 for fertilization. The outer hard tube 5 is a hard tube, and the inner tube 4 and the outer hard tube 5 are circular tubes 24. The outer hard tube 5 is sleeved on the outside of the inner tube 4, and the diameter of the outer hard tube 5 is larger than that of the inner tube 4. On the one hand, it is used to protect the inner tube 4, and the outer hard tube 5 is fixedly connected with the needle 6 to provide support for the needle 6 to penetrate into the soil. The needle 6 penetrates into the soil to facilitate accurate positioning and fertilization, and the fertilization is more in-depth, saving fertilizer. On the other hand, the falling seeds can reduce the falling speed when colliding with the outer hard tube 5, so that the contact speed of the seeds with the ground is small, avoiding the bouncing of the seeds when landing, improving the friction of the seeds, reducing the re-broadcasting and missing rate, and making the plant spacing uniform.

[0049] After the needle 6 penetrates into the soil to complete fertilization, the outer hard tube 5 drives the needle 6 to retract from the needle hole 7 into the inner wall of the first duckbill body 2, and the inner wall of the first duckbill body 2 protects the needle 6 from soil blockage.

[0050] The first duckbill body 2 and the second duckbill body 3 can rotate around the hinge point on the support seat 1, and the first duckbill body 2 and the second duckbill body 3 are opposite to each other. When the duckbill is not working, the two duckbill bodies are closed together, and when the seeds are needed, the first duckbill body 2 and the second duckbill body 3 are inserted into the soil to open.

[0051] The plurality of first needle tube assemblies and the plurality of second needle tube assemblies constitute an annular fertilization channel, which can also constitute other shapes of fertilization channels.

[0052] Further, the first needle tube assembly 46 further comprises a first annular frame 8, a connecting ring 10 and a half ring 11. The end of the outer hard tube 5 close to the fertilizer delivery pipe is connected with the connecting ring 10, and the end of the outer hard tube 5 away from the fertilizer delivery pipe is slidingly connected with the half ring 11. The half ring 11 is fixed on the inner wall of the first duckbill body 2, and the connecting ring 10 is rotationally connected with the first annular frame 8.

[0053] As a preferred embodiment, multiple outer hard tubes 5 are arranged on the first annular frame 8. In a preferred embodiment, three outer hard tubes 5 are arranged on the first annular frame 8. The first annular frame 8 is semicircular. The first annular frame 8 passes through the connecting ring 10. The rotational connection is specifically that the connecting ring 10 can rotate around the first annular frame. The connecting ring 10 is fixedly connected to the side wall of one end of the outer hard tube 5. The inner tube 4 passes through the connecting ring 10 and can slide in the connecting ring 10. The outer hard tube 5 is fixedly connected to the connecting ring 10. The connecting ring 10 is away from the outer wall of the first annular frame 8 and is slidably connected to the inner wall of the first duckbill body 2. The connecting ring 10 can slide up and down on the inner wall of the first duckbill body 2.

[0054] The first annular frame 8 is double-layered and includes an upper portion and a lower portion. The upper portion is positioned above the lower portion, with a plurality of support columns disposed between the upper portion and the lower portion. A first pressing assembly is connected to the upper portion of the first annular frame, and a connecting ring is connected to the lower portion.

[0055] The outer hard tube 5 passes through the semi-ring 11 and is connected to the needle 6. The semi-ring 11 can limit the horizontal movement of the outer hard tube 5, so that the end of the outer hard tube 5 close to the needle tube can rotate synchronously with the first duckbill body 2. When the first duckbill body 2 rotates, the outer hard tube 5 drives the needle 6 and the inner tube 4 to rotate synchronously with the first duckbill body 2. The outer hard tube 5 rotates around the first annular frame 8. The semi-ring 11 connects the outer hard tube 5 to the inner wall of the duckbill body. The duckbill body drives the outer hard tube 5 to rotate synchronously, so that the needle 6 can always be opposite to the pinhole 7. When it is necessary to extend the needle into the pinhole 7 for fertilizing, it is only necessary to push the outer hard tube 5 downward through the first annular frame 8 to make the needle 6 extend out of the pinhole 7. The first annular frame 8 is connected to the first pressing assembly.

[0056] Specifically, the angle of the notch of the semi-ring 11 is less than ninety degrees, so that the outer hard tube 5 can be clamped in the semi-ring 11 to limit the position in the horizontal direction.

[0057] Specifically, the first needle tube assembly 46 further includes a spring 12 , which is sleeved on the outside of the outer hard tube 5 , with one end of the spring 12 abutting against the connecting ring 10 , and the other end of the spring 12 abutting against the half ring 11 .

[0058] The outer hard tube 5 can slide relative to the half ring 11 along the axial direction of the outer hard tube 5. The spring 12 is arranged between the connecting ring 10 and the half ring 11. The half ring 11 is fixedly connected to the inner wall of the first duckbill body 2. The connecting ring 10 can drive the outer hard tube 5 to slide along the inner wall of the first duckbill body 2. When the outer hard tube 5 drives the needle 6 to penetrate into the soil, the connecting ring 10 moves down with the outer hard tube 5 to compress the spring 12. After fertilization is completed, the first pressing assembly removes the pressing force on the first annular frame, and the spring 12 rebounds to rebound the outer hard tube 5 and the first annular frame to the inner wall of the first duckbill body 2. At the same time, the spring 12 has another function, which is to increase the friction with the surface of the falling seeds, which can more effectively reduce the falling speed of the seeds.

[0059] The length of the outer hard tube 5 is smaller than the length of the duckbill body.

[0060] Optionally, the first needle tube assembly 46 also includes a fixing ring 14, a needle tube groove 13 is opened on the inner wall of the first duckbill body 2, the fixing ring 14 is fixed at one end of the needle tube groove 13, the inner tube 4 passes through the fixing ring 14, and can slide relative to the fixing ring 14, the spring 12 is embedded in the needle tube groove 13, and the depth of the needle tube groove 13 is less than the diameter of the spring 12.

[0061] The outer wall of the connecting ring 10 is embedded in the needle tube groove 13 and can slide in the needle tube groove 13. The needle tube groove 13 is a semicircular groove with a diameter larger than the diameter of the spring 12. The spring 12 can freely compress or rebound in the needle tube groove 13. The needle tube groove 13 acts as a guide, allowing the outer rigid tube 5 to slide along the needle tube groove 13. The outer wall of the semi-ring is fixed in the needle tube groove 13. The fixing ring 14 is fixed in the needle tube groove 13, and plays a role in fixing the inner tube in the horizontal direction. The height of the fixing ring 14 is higher than the height of the connecting ring 10.

[0062] Specifically, such as Figure 7 As shown, the top of the first duckbill body 2 extends outward horizontally to form a first support plate 15, and the top of the second duckbill body 3 extends outward horizontally to form a second support plate. The first needle tube assembly 46 also includes a first pressing assembly, which includes:

[0063] The first clip 17, the second clip 18, the first press wire 19, the first slide rail 21 and the first slider 22, the first clip 17 is fixed on the first support plate 15, the second clip 18 is fixed on the second support plate, the first slider 22 cooperates with the first slide rail 21, the first slide rail 21 is vertically arranged on the side of the first support plate 15 close to the first duckbill body 2, one end of the first press wire 19 is fixed on the second clip 18, and the other end of the first press wire 19 passes through the first clip 17 and the bottom end of the first slide rail 21 in sequence, and is connected to the bottom of the first slider 22, and the first slider 22 is rotatably connected to the first annular frame on the side away from the first slide rail 21.

[0064] The first and second buckles 17 and 18 are semi-circular rings; the first slider 22 is connected with the first ring-shaped frame 8, and the rotating connection is specifically that the first slider 22 can rotate around the first ring-shaped frame 8. As a preferred embodiment, the first slider 22 can be connected with the first ring-shaped frame 8 through the first slider ring 20, the first ring-shaped frame 8 passes through the first slider ring 20, and the first slider ring 20 is fixedly connected with the first slider.

[0065] The first needle tube assembly 46 further comprises a second pressing assembly 23, which comprises:

[0066] The third and fourth buckles, the second pressing pull wire, the second sliding rail and the second slider, the third buckle is fixed on the second support plate, the fourth buckle is fixed on the first support plate 15, the second slider is matched with the second sliding rail, the second sliding rail is vertically arranged on the second support plate, one end of the second pressing pull wire is fixed on the fourth buckle, the other end of the second pressing pull wire passes through the third buckle and the bottom end of the second sliding rail in sequence and is connected with the bottom of the second slider, and the side of the second slider away from the first sliding rail is rotatably connected with the first ring-shaped frame. The second slider can be connected with the first ring-shaped frame 8 through the second slider ring, the first ring-shaped frame 8 passes through the second slider ring, and the second slider ring is fixedly connected with the second slider.

[0067] The first pressing assembly is arranged at one end of the first ring-shaped frame, and the second pressing assembly 23 is arranged at the other end of the first ring-shaped frame, so that the first ring-shaped frame 8 is pressed downward, and a stable parallel downward pressing force is provided for the first ring-shaped frame 8, so that the first ring-shaped frame can stably push the needle head out.

[0068] The first needle tube assembly 46 further comprises a blocking block 9, and one blocking block 9 is arranged at each end of the first ring-shaped frame to prevent the first ring-shaped frame 8 from sliding out of the first slider ring and the second slider ring.

[0069] When the first and second duckbill main bodies 2 and 3 are opened, the second buckle 18 moves with the second duckbill main body 3, and the first buckle 17 moves with the first duckbill main body 2, the first buckle 17 and the second buckle 18 are separated from each other, the second buckle 18 pulls the first pressing pull wire 19 to move in the direction of the second buckle 18, the first pressing pull wire 19 drives the first slider to move downward along the first sliding rail 21, the first slider slides to the bottom end of the first sliding rail 21 and drives the first ring-shaped frame 8 to move downward, the first ring-shaped frame 8 drives the outer hard tube 5 to move downward, and the first pressing assembly realizes that the needle head 6 is stretched out of the needle hole 7 to perform fertilization. When the first and second duckbill main bodies 2 and 3 are closed, the spring 12 provides an upward elastic force for the first ring-shaped frame 8, and the first slider slides along the bottom end of the first sliding rail 21 to the top end of the first sliding rail 21.

[0070] The maximum rebound height of the first annular frame 8 driven by the spring 12 is smaller than the height of the first sliding block at the top end of the first slide rail 21 .

[0071] Since the spring 12 is connected to the first annular frame 8 via the connecting ring 10 , the rebound height of the first annular frame 8 is smaller than the height of the first sliding block at the top end of the first slide rail 21 .

[0072] Optionally, limit blocks are provided at the top ends of the first slide rail 21 and the second slide rail to prevent the first sliding block from sliding out.

[0073] The first pressing assembly can make the needle 6 extend along with the openings of the first duckbill body 2 and the second duckbill body 3, thereby realizing synchronous fertilization of liquid fertilizer.

[0074] Optionally, the first needle tube assembly 46 further includes a circular tube 24 and a connecting tube 25. The circular tube 24 is arranged above the first annular frame 8, and the circular tube 24 is arranged above the annular tube. The circular tube 24 is connected to the annular tube through the connecting tube 25. The annular tube is connected to one end of the inner tube 4 through a fertilizer delivery tube. The fertilizer delivery tube is specifically a telescopic fertilizer delivery tube 45. The telescopic fertilizer delivery tube 45 has a function of being retractable in length.

[0075] The annular tube is semicircular, and the diameter of the circular tube is larger than that of the inner tube, ensuring that the circular tube can provide sufficient fertilizer flow for the multiple annular tubes, making fertilizer transportation more stable. The annular tube is connected to the circular tube 24 by multiple connecting tubes 25. When the needle 6 is inserted, the telescopic fertilizer delivery tube 45 can provide a certain amount of movement margin for the inner tube 4. The telescopic fertilizer delivery tube 45 has a telescopic length greater than the downward movement length of the needle 6.

[0076] The double-layer pipeline design of circular tubes and annular tubes is designed to better improve the uniformity and accuracy of liquid fertilizer application when operating in hilly and mountainous areas or facing complex terrain and uneven ground, and to control the synchronous delivery of liquid fertilizer to the first needle tube assembly and the second needle tube assembly for fertilization operations when liquid fertilizer is bumpy, shaking or tilted.

[0077] Specifically, the support base 1 is U-shaped, and a first side plate 26 and a second side plate 27 extend upward from both sides of the first support plate 15. The first side plate 26 is opposite to the second side plate 27, and the support base 1 is inserted between the first side plate 26 and the second side plate 27. The support base also includes an opening and closing component, which includes:

[0078] The first rotating axis 28, the second rotating axis 29, the first fixing member 30, the second fixing member 31 and the tension spring 32, the support seat 1 is hinged to the first duckbill body 2 through the first rotating axis 28, and the support seat 1 is hinged to the second duckbill body 3 through the second rotating axis 29, the first fixing member 30 is fixed on the first side plate 26, and the second fixing member 31 is fixed on the side of the support seat 1 close to the first side plate 26, one end of the tension spring 32 is connected to the end of the first rotating axis 28 close to the second side plate 27, and the other end of the tension spring 32 is connected to the end of the second rotating axis 29 close to the second side plate 27, and the vertical height of the first fixing member 30 and the vertical height of the second fixing member 31 are higher than the first rotating axis 28.

[0079] When one end of the tension spring 32 rotates and stretches along with the first rotating shaft 28 , the other end of the tension spring 32 can pull the second rotating shaft 29 to rotate.

[0080] The support base 1 is provided with a seeding hole, the center of the circular tube 24, the center of the annular tube and the annular fertilization channel are opposite to each other, and the seeds fall onto the ground through the seeding hole, the circular tube 24, the annular tube and the annular fertilization channel in sequence.

[0081] The first rotating shaft 28 passes through the first side plate 26, the support seat 1 and the second side plate 27. One end of the first rotating shaft 28 is fixedly connected to the first side plate 26, and the other end of the first rotating shaft 28 is fixedly connected to the second side plate 27. The first rotating shaft 28 can rotate around the axis of the first rotating shaft 28 in the support seat 1. One end of the pull wire 41 passes through the second fixing frame and is connected to the first fixing member 30. The second duckbill body 3 is fixedly connected to the second rotating shaft 29. The second rotating shaft can rotate around the axis of the second rotating shaft 29 relative to the support seat 1. When the pull wire 41 is pulled, the first side plate 26 rotates around the first rotation axis 28, and the first rotation axis 28 drives one end of the tension spring 32 to rotate around the first rotation axis 28, and the other end of the tension spring 32 drives the second rotation axis 29 to rotate, and the second rotation axis 29 drives the second duckbill body 3 to rotate, and the second duckbill body 3 rotates with the first duckbill body 2. The first fixing member 30 can fix the end of the pull wire 41 on the first side plate 26, and the pull wire 41 can pass through the second fixing member 31 and can slide on the second fixing member 31. The first fixing member 30 and the second fixing member 31 are arranged in parallel. The above structure is not limited to the structure of this opening and closing assembly. In the prior art, as long as the structure that can realize the opening and closing of the first duckbill body 2 and the second duckbill body 3 can be applied to this embodiment.

[0082] The second duckbill body 3 has the same structure as the first duckbill body 2 , and the second needle tube assembly 47 has the same structure as the first needle tube assembly 46 .

[0083] As a preferred embodiment, the structural difference between the second needle tube assembly and the first needle tube assembly is that the first pressing assembly of the second needle tube assembly does not include the first buckle and the second buckle, and it shares the first buckle and the second buckle with the first pressing assembly in the first needle tube assembly. The second pressing assembly in the second needle tube assembly does not include the third buckle and the fourth buckle, and it shares a third buckle and a fourth buckle with the pressing assembly in the first needle tube assembly. Apart from this, the rest of the structure of the second needle tube assembly is the same as that of the first needle tube assembly.

[0084] The working principle of the duckbill type hole seeder of the present invention is as follows: the first duckbill body 2 and the second duckbill body 3 are inserted into the soil, the first duckbill body 2 and the second duckbill body 3 are opened by the opening and closing assembly, and at the same time, the seedlings are dropped above the annular fertilization channel, the first pressing assembly and the second pressing assembly 23 press the first annular frame 8, and the needle 6 is extended from the needle hole 7 to fertilize. After the seedlings fall to the ground, the first duckbill body 2 and the second duckbill body 3 move up and away from the ground to close, and the spring 12 simultaneously drives the needle 6 to retract from the needle hole 7 to the inside of the first duckbill body 2 to complete fertilization and sowing.

[0085] The present invention also discloses a sowing unit, including the above-mentioned duckbill type seed drill, and also including a frame 33 and a transmission assembly, the transmission assembly is connected to the duckbill type seed drill, and the transmission assembly includes:

[0086] Power input shaft 34, crank flywheel shaft 35, upper crank flywheel 36, lower crank flywheel 37, connecting rod 38 and sowing rocker arm 39; the power input shaft 34 is arranged at the bottom end of the frame 33, and the crank flywheel shaft 35 is arranged at the top of the frame 33. The power input shaft 34 and the crank flywheel shaft 35 are connected through a gear rack transmission. One end of the power input shaft 34 is connected to one end of the lower crank flywheel 37, and the other end of the lower crank flywheel 37 is hinged to one end of the sowing rocker arm 39, and the other end of the sowing rocker arm 39 is connected to the support seat 1, one end of the upper crank flywheel 36 is connected to the crank flywheel shaft 35, and the other end of the upper crank flywheel 36 is hinged to one end of the connecting rod 38, and the other end of the connecting rod 38 is hinged to the sowing rocker arm 39.

[0087] Optionally, it also includes a pull wire rocker arm 40, a pull wire 41, and a seed throwing bucket 42. The pull wire rocker arm 40 is arranged at the top of the frame 33. A cam is arranged at the other end of the upper crank flywheel shaft 35. The cam cooperates with the pull wire rocker arm 40. One end of the pull wire rocker arm 40 is connected to the pull wire, and the other end of the pull wire passes through the second fixing member 31 and is connected to the first fixing member 30. The seed throwing bucket 42 is arranged on the support seat 1, and the outlet end of the seed throwing bucket is opposite to the annular fertilization channel.

[0088] The upper crank flywheel 36 comprises a circular disc and a rectangular plate connected to the circumference of the circular disc. The lower crank flywheel 37 is of the same shape as the upper crank flywheel 36. The power input wheel crank flywheel shaft 35 rotates, which, through a sprocket drive, drives the upper crank flywheel 36 and the lower crank flywheel 37. The upper crank flywheel shaft 35 controls the reciprocating motion of the cable rocker arm 40 via a cam. The cable rocker arm 40 controls the opening and closing of the duckbill seed drill via a cable. The upper crank flywheel 36 and the lower crank flywheel 37 act together on the seeding rocker arm 39, which drives the duckbill seed drill to perform seeding operations.

[0089] Two duckbill hole seeders operate synchronously to achieve dense planting in two rows on large ridges, which can increase yield.

[0090] like Figures 10 to 12 As shown, the present invention also discloses a seeding machine, including at least two seeding units as described above arranged side by side, and also including a liquid fertilizer barrel 43 and a liquid infusion main pipe 44. Every two adjacent seeding units are connected to one end of a liquid infusion main pipe 44, and the other end of the liquid infusion main pipe 44 is connected to the liquid fertilizer barrel 43.

[0091] A main fluid delivery pipe 44 is located between two adjacent sowing units. It connects to the circular tube 24 in the first sowing unit via a first conduit, and to the circular tube 24 in the second sowing unit via a second conduit. The main fluid delivery pipe 44 is a telescopic tube, facilitating reciprocating movement of the machine and providing variable space.

[0092] A load-bearing box is provided on the frame 33, and the liquid fertilizer barrel 43 is fixed to the upper end of the liquid fertilizer barrel load-bearing box by bolts. The oil in the infusion main pipe 44 is divided into left and right under the control of the hydraulic pump, and flows into the circular tube 24 of the first duckbill type seed drill through the first pipeline, and flows into the circular tube 24 of the second duckbill type seed drill through the second pipeline.

[0093] By synchronously operating the upper crank flywheel 36 and the lower crank flywheel 37, power consumption is reduced, part of the vibration can be balanced, and the operation is made more stable. Large ridges and double rows of dense planting can improve work efficiency and increase yield.

[0094] The lid above the liquid fertilizer barrel 43 can be opened to replenish liquid fertilizer at any time. The liquid fertilizer is diverted left and right from the main infusion pipe 44 under the control of the hydraulic pump and flows into two adjacent sowing units. The hydraulic pump is equipped with a filtering device to effectively filter solid fiber materials in the liquid fertilizer.

[0095] Under the power input of the tractor, two adjacent sowing units operate synchronously to realize the large ridge double-row operation mode. While sowing, the fertilizer needles around the inside of the duckbill type hole seeder are pressed and extended, and liquid fertilizer is sprayed under the control of the hydraulic pump. Then the duckbill type hole seeder is closed under the action of the tension spring 32. At the same time, the fertilizer needle is driven to retract under the action of the first pressing wire 19 and the pressing spring 12 to complete an operation cycle.

[0096] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and are not to be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments without departing from the principles and intent of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A duckbill type seed drill, comprising a support base, a first duckbill body and a second duckbill body, wherein the support base is hinged to the first duckbill body and the second duckbill body respectively, characterized in that: Also includes a first needle tube assembly and a second needle tube assembly; at least one of the first needle tube assembly is disposed in the first duckbill body, and at least one of the second needle tube assembly is disposed in the second duckbill body, and the first needle tube assembly and the second needle tube assembly form an annular fertilizer channel; The first needle tube assembly includes: An inner tube, an outer hard tube and a needle, wherein the outer hard tube is sleeved on the outside of the inner tube, one end of the inner tube is connected to the fertilizer delivery tube, the other end of the inner tube is connected to the needle, and the end of the outer hard tube away from the fertilizer delivery tube is fixedly connected to the needle; a pinhole is provided at the bottom end of the first duckbill body, the pinhole is opposite to the needle, and when fertilizing, the outer hard tube can drive the needle to extend out of the pinhole to fertilize; The first needle tube assembly further includes a first annular frame, a connecting ring, and a half ring, wherein one end of the outer hard tube close to the fertilizer delivery tube is connected to the connecting ring, and one end of the outer hard tube away from the fertilizer delivery tube is slidably connected to the half ring, the half ring is fixed to the inner wall of the first duckbill body, and the connecting ring is rotatably connected to the first annular frame; The first needle tube assembly further includes a spring, which is sleeved on the outside of the outer hard tube, one end of the spring abuts against the connecting ring, and the other end of the spring abuts against the half ring; A first support plate extends horizontally outward from the top of the first duckbill body, and a second support plate extends horizontally outward from the top of the second duckbill body. The first needle tube assembly further includes a first pressing assembly, which includes: A first buckle, a second buckle, a first press wire, a first slide rail and a first slider, the first buckle is fixed on the first support plate, the second buckle is fixed on the second support plate, the first slider cooperates with the first slide rail, the first slide rail is vertically arranged on the side of the first support plate close to the first duckbill body, one end of the first press wire is fixed on the second buckle, the other end of the first press wire passes through the first buckle and the bottom end of the first slide rail in sequence, and is connected to the bottom of the first slider, and the side of the first slider away from the first slide rail is rotatably connected to the first annular frame.

2. A duckbill type seed drill as claimed in claim 1, characterized in that: The first needle tube assembly also includes a fixing ring, a needle tube groove is opened on the inner wall of the first duckbill body, the fixing ring is fixed at one end of the needle tube groove, the inner tube passes through the fixing ring and can slide relative to the fixing ring, the spring is embedded in the needle tube groove, and the depth of the needle tube groove is less than the diameter of the spring.

3. The duckbill seed drill according to claim 1, wherein: It also includes a circular tube and a connecting tube. The first needle tube assembly also includes an annular tube. The annular tube is arranged above the first annular frame. The circular tube is arranged above the annular tube. The circular tube is connected to the annular tube through a connecting tube. The annular tube is connected to one end of the inner tube through the fertilizer delivery tube. The fertilizer delivery tube is a telescopic fertilizer delivery tube.

4. The duckbill seed drill according to claim 1, wherein: The support base is U-shaped, with first and second side plates extending upward from both sides of the first support plate. The first side plate is opposite to the second side plate, and the support base is inserted between the first and second side plates. The support base also includes an opening and closing assembly, which includes: A first rotating axis, a second rotating axis, a first fixing member, a second fixing member and a tension spring, the support seat is hinged to the first duckbill body through the first rotating axis, the support seat is hinged to the second duckbill body through the second rotating axis, the first fixing member is fixed to the first side panel, the second fixing member is fixed to the side of the support seat close to the first side panel, one end of the tension spring is connected to one end of the first rotating axis close to the second side panel, the other end of the tension spring is connected to one end of the second rotating axis close to the second side panel, the vertical height of the first fixing member and the vertical height of the second fixing member are higher than the first rotating axis.

5. A sowing unit, characterized in that: The device comprises the duckbill type seed drill as claimed in claim 4, further comprising a frame and a transmission assembly, wherein the transmission assembly is connected to the duckbill type seed drill, and the transmission assembly comprises: A power input shaft, a crank flywheel shaft, an upper crank flywheel, a lower crank flywheel, a connecting rod and a sowing rocker arm; the power input shaft is arranged at the bottom end of the frame, the crank flywheel shaft is arranged at the top end of the frame, the power input shaft and the crank flywheel shaft are connected through a gear rack transmission, one end of the power input shaft is connected to one end of the lower crank flywheel, the other end of the lower crank flywheel is hinged to one end of the sowing rocker arm, the other end of the sowing rocker arm is connected to the support seat, one end of the upper crank flywheel is connected to the crank flywheel shaft, the other end of the upper crank flywheel is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the sowing rocker arm.

6. A sowing unit as claimed in claim 5, characterized in that: It also includes a pull-wire rocker arm, a pull wire, and a seed throwing bucket. The pull-wire rocker arm is arranged at the top of the frame, a cam is arranged at the other end of the upper crank flywheel shaft, and the cam cooperates with the pull-wire rocker arm. One end of the pull-wire rocker arm is connected to the pull wire, and the other end of the pull wire passes through the second fixing piece and is connected to the first fixing piece. The seed throwing bucket is arranged on the support seat, and the outlet end of the seed throwing bucket is opposite to the annular fertilization channel.

7. A complete sowing machine, characterized in that: It comprises at least two sowing units as described in any one of claims 5-6 arranged side by side, and also comprises a liquid fertilizer barrel and a liquid infusion main pipe, wherein every two adjacent sowing units are connected to one end of the liquid infusion main pipe, and the other end of the liquid infusion main pipe is connected to the liquid fertilizer barrel.

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