Precise sesame seeding device

Abstract

The invention belongs to the technical field of agricultural equipment, and particularly relates to a precise sesame seeding device which comprises a seed selecting mechanism, an air pressure adjusting mechanism and a seed conveying mechanism, the seed selection mechanism comprises a seed storage box, a power shaft, a guide disc, a stepping motor for driving the power shaft to rotate, and a transverse driving mechanism for driving the guide disc to transversely move; the outer side of the guide disc is connected with a guide sleeve, and the other end of the guide sleeve is movably connected with an adjusting disc; the power shaft penetrates through the guide sleeve and the adjusting disc, and the adjusting disc is in sliding connection with the power shaft; a vacuum disc is installed on the outer side of the seed storage box, a ruler clamp is arranged on the seed disc in a sliding mode, and the size of the seed chamber is changed through sliding of the ruler clamp; during sowing, a user can select the size of the seed chamber according to the size of sesame seeds, so that excessive sesame seeds are prevented from entering the seed chamber at a time.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural equipment, in particular to a sesame precision sowing device. Background Art

[0002] Precision seeding ensures that sesame seeds are evenly distributed in the soil, providing them with ample space and nutrients for growth, thereby improving seeding efficiency and quality. Precision seeding primarily uses an air seeder, which uses negative pressure to trap individual seeds in a chamber. The chamber then removes the seeds, which are then discharged through a hose under gravity.

[0003] Sesame seeds vary in size from batch to batch (2-5mm). To ensure they can be drawn into the seed chamber, the chamber is typically larger, such as 5mm. This results in two seeds being drawn into the chamber when the seeds are smaller (less than 2.5mm). Subsequently, one or two seeds are randomly ejected from the chamber, hindering precise sowing. Furthermore, the hose in the air seeder is curved, and some seeds can become trapped in the hose due to friction and cannot be expelled promptly, which also prevents precise sowing.

[0004] Therefore, we propose a sesame sowing device for discharging sesame seeds in precise quantities. Summary of the Invention

[0005] The object of the present invention is to provide a sesame precision sowing device to solve the problem in the above-mentioned background technology that the existing sesame sowing device is difficult to stably control the number of discharged sesame seeds.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a sesame precision sowing device, comprising: a seed selection mechanism, an air pressure regulating mechanism, and a seed conveying mechanism; The seed selection mechanism includes: a seed storage box, a power shaft and a guide disk, a stepping motor for driving the power shaft to rotate, and a transverse driving mechanism for driving the guide disk to move transversely; a guide sleeve is connected to the outer side of the guide disk, and the other end of the guide sleeve is movably connected to the adjustment disk; the power shaft passes through the guide sleeve and the adjustment disk, and the adjustment disk is slidably connected to the power shaft; A vacuum disk is installed on the outside of the seed storage box, one end of the power shaft extends into the inner side of the vacuum disk and is connected to the seed disk, and the seed disk corresponds to the seed storage box; an air blocking groove is provided on one side of the seed disk, and a ventilation groove and a guide slide groove connected to the air blocking groove are provided on the other side, a ruler clip is inserted into the inner side of the guide slide groove, and a sesame filter is provided on the inner side of the ventilation groove; an arc-shaped air guide groove is provided on the inner side of the vacuum disk, and an external air pipe that passes through the vacuum disk is provided on the arc-shaped air guide groove, and the other end of the external air pipe is connected to the suction end of the air pressure regulating mechanism; The ruler clamp includes an air baffle, an inner pressure inclined plate and an outer pressure inclined plate; the outer side of the adjusting disk is provided with an outer convex ring abutting against the inner pressure inclined plate and an inner concave ring abutting against the outer pressure inclined plate; when the inner concave ring squeezes the outer pressure inclined plate, the ruler clamp slides outward along the radial direction of the seed disk; when the outer convex ring squeezes the inner pressure inclined plate, the ruler clamp slides inward along the radial direction of the seed disk; the air baffle is movably plugged into the inner side of the air baffle groove and blocks the outer side of the sesame filter, and the air baffle slides along the radial direction of the seed disk, which will change its blocking area of the sesame filter; The seed conveying mechanism includes: an accelerating tube, an air distribution shaft, and a uniform rotation motor driving the air distribution shaft to rotate; a seed inlet tube and a seed outlet tube are located outside the accelerating tube, and the seed inlet tube is located above the seed outlet tube; the air distribution shaft is located inside the accelerating tube, and an air delivery groove is formed in the axial direction of the air distribution shaft, and an air supply groove connected to the air supply groove and a seed hole corresponding to the seed outlet tube are formed outside the air distribution shaft; when the seed hole is aligned with the seed outlet tube, the air supply groove is misaligned with the seed outlet tube; when the air supply groove corresponds to the seed outlet tube, the seed hole is misaligned with the seed outlet tube; One end of the air distribution shaft containing the air delivery groove is connected to a rotary joint, and the exhaust end of the air pressure regulating mechanism is connected to the other end of the rotary joint through a pipeline; the discharge end of the seed selection mechanism corresponds to the seed inlet pipe.

[0007] Preferably, the accelerating tube comprises four groups of seed inlet tubes and seed outlet tubes, and the connecting line of each group of seed inlet tubes and seed outlet tubes deviates from the central axis of the accelerating tube; The gas dividing shaft includes four groups of seeding holes and gas adding grooves, and the central axis of the gas adding grooves in the same group is coplanar and perpendicular to the central axis of the seeding holes; the central axes of adjacent seeding holes are perpendicular to each other, and the seeding holes with central axes parallel to each other are distributed on both sides of the central axis of the gas dividing shaft.

[0008] Preferably, it further comprises a feeding funnel, wherein a vibration box is provided at the lower end of the feeding funnel, and a storage box is provided at the lower side of the vibration box; The inner side of the vibration box is detachably connected to a dividing screen, and the inner side of the storage box is provided with several groups of storage bins for storing seeds screened out by the dividing screen. The lower side of each group of storage bins is connected to a discharge pipe, and a material blocking valve is provided on the discharge pipe.

[0009] Preferably, the air pressure regulating mechanism comprises a cam bracket, a guide slide rod and a cylinder sleeve, one end of the cam bracket is movably connected to a cam, and the rotating shaft of the cam is connected to an air supply motor that drives the cam to rotate; The outer side of the cam is hinged with a connecting rod, the other end of the connecting rod is hinged with a guide slide, and the guide slide is slidably connected to the guide slide; the inner side of the cylinder sleeve is plugged with a piston rod, and the other end of the piston rod is connected to the guide slide; The outer side of the cylinder sleeve of the air cylinder is connected with an air intake pipe and an air outlet pipe, and both the air intake pipe and the air outlet pipe are provided with a one-way valve.

[0010] Preferably, there are at least two sets of piston rods and cylinder sleeves, and there are two sets of piston rods whose suction and exhaust actions are in opposite states.

[0011] Preferably, it further comprises a valve motor and a plurality of seed limiting valves, wherein the rotating shaft of the valve motor is connected to the valve stem of the seed limiting valve, and the valve stems of the plurality of seed limiting valves are connected to each other.

[0012] Preferably, the seed limiting valve includes a valve body and a valve core, and an inoculation groove is provided on the outside of the valve core; the lower side of the valve body is connected to a vertically arranged seed dropping tube.

[0013] Preferably, an open pipe is provided on the upper side of the valve body, and an air diffusion pipe is provided on the upper side of the open pipe; a feed pipe is provided on the outer side of the open pipe, and the inner diameter of the open pipe is larger than the inner diameter of the feed pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1) This device has a sliding ruler clip on the seed tray. The sliding of the ruler clip adjusts the area of the sesame filter screen covered by it, thereby changing the size of the seed chamber. When sowing, the user can choose the size of the seed chamber according to the size of the sesame seeds, thereby avoiding too many sesame seeds entering the seed chamber at a time. That is, the seed chamber can only take away one sesame seed at a time, thereby ensuring the accuracy of the sowing amount.

[0015] 2) This device pushes the sesame seeds in the hose through airflow, which can prevent the sesame seeds from being trapped in the curved hose, thereby ensuring that the seeds in the hose can be accurately discharged, thereby ensuring the accuracy of sowing.

[0016] 3) This device is equipped with an air intake pipe and an air outlet pipe on the cylinder sleeve. Through the suction and exhaust actions, a low-pressure and high-pressure environment are generated, so that the air supply motor can perform air delivery and suction actions in one work, thereby saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the seed selection box of the present invention; Figure 3 This is a schematic structural diagram of the guide sleeve of the present invention; Figure 4 This is a schematic diagram of the combination of the vacuum plate, seed plate, and ruler clamp structure of the present invention; Figure 5 For the present invention Figure 3 Structural cross-sectional diagram; Figure 6 This is a schematic diagram of the vacuum plate structure of the present invention; Figure 7This is a schematic diagram of the ruler clamp structure of the present invention; Figure 8 This is a structural schematic diagram of a seed storage box according to the present invention; Figure 9 This is a schematic diagram of the internal structure of the outer box of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the accelerating tube of the present invention; Figure 11 This is a schematic diagram of the cross-sectional structure of the gas separation shaft of the present invention; Figure 12 This is a schematic diagram of the internal structure of the air pressure chassis of the present invention; Figure 13 This is a schematic diagram of the cross-sectional structure of the seed limiting valve of the present invention; Figure 14 It is a structural schematic diagram of the screening mechanism of the present invention.

[0018] In the figure: 20 seed selection mechanism, 30 air pressure regulating mechanism, 40 seed conveying mechanism, 50 valve motor, 60 seed limiting valve; 11 feeding funnel, 12 vibration box, 13 storage box, 14 distributor, 15 seed distribution mechanism, 16 distribution screen, 17 discharge pipe, 18 blocking valve; 211 stepper motor, 212 reduction motor, 213 power shaft, 22 vacuum plate, 23 seed storage box, 241 transverse drive mechanism, 242 guide plate, 243 guide sleeve, 244 adjustment plate, 25 seed plate, 26 ruler clamp, 27 sesame filter; 221 arc-shaped air guide groove, 222 external air pipe; 231 transfer bin, 232 seed passing groove, 233 seed entry groove, 234 scraper, 235 seed discharge groove; 261 air baffle, 262 internal pressure inclined plate, 263 external pressure inclined plate; 311 cam bracket, 312 air cylinder bracket plate, 321 air supply motor, 322 cam, 323 connecting rod, 331 guide slide bar, 332 guide slide plate, 341 piston rod, 342 air cylinder sleeve, 343 air intake pipe, 344 air outlet pipe, 345 one-way valve, 346 air storage tank; 41 support frame, 421 acceleration tube, 422 seed inlet tube, 423 seed outlet tube, 424 expansion slot, 431 air distribution shaft, 432 air delivery slot, 433 air adding slot, 434 seed hole, 44 uniform rotation motor, 45 rotary joint; 61 air diffusion pipe, 62 open pipe, 63 valve body, 64 valve core, 65 seed dropping pipe, 66 feed pipe. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] Example 1: See also Figures 1-11 The present invention provides a technical solution: a sesame precision sowing device, comprising: a seed selection mechanism 20, an air pressure regulating mechanism 30, and a seed conveying mechanism 40. The seed selection mechanism 20 has a seed chamber with an adjustable size. After the user places the sesame seeds of selected size into the seed selection mechanism 20, the size of the seed chamber is adjusted according to the size of the sesame seeds, so that the size of the seed chamber matches the size of the sesame seeds, so that only one sesame seed can be taken away from the seed chamber at a time; finally, the sesame seeds in the seed chamber are transferred to the seed conveying mechanism 40. The air pressure regulating mechanism 30 is used to create a negative pressure environment, thereby providing negative pressure in the seed chamber; at the same time, the air pressure regulating mechanism 30 is also used to increase the air pressure and then send airflow into the seed conveying mechanism 40. This airflow carries the seeds in the seed conveying mechanism 40 away, thereby preventing the seeds from being retained in the plastic (rubber) pipe.

[0022] The seed selection mechanism 20 includes: a seed selection box, a stepping motor 211, a power shaft 213, a seed disc 25, a ruler clamp 26, a transverse drive mechanism 241, a guide disc 242, a guide sleeve 243, an adjustment disc 244 and a seed storage box 23.

[0023] The stepper motor 211 is installed on the lower wall of the inner cavity of the seed selection box, and its output end is connected to the input end of the reduction motor 212. The reduction motor 212 is also fixed on the inner wall of the seed selection box. The output end of the reduction motor 212 is connected to the power shaft 213, and the other end of the power shaft 213 is connected to the seed storage box 23 through a bearing; an adapter plate is provided on the outside of the power shaft 213, and a threaded hole is provided on the adapter plate. A through hole is provided on the seed plate 25. The seed plate 25 can be fixed to the adapter plate by passing a bolt through the through hole of the seed plate 25 and connecting it to the threaded hole on the adapter plate, so that the seed plate 25 can rotate synchronously with the power shaft 213.

[0024] The transverse drive mechanism 241 is primarily used to drive the guide plate 242 to move laterally. It includes a transverse motor, a transverse screw, a ball nut, a support plate, a linear guide, and a slider. Two support plates are fixed to the inner wall of the selection box. A transverse screw is connected between the two support plates, and the optical axis end of the transverse screw is connected to the support plate via a bearing. The transverse motor is a servo motor fixed to the inner wall of the selection box. Its output shaft is connected to the transverse screw to drive the transverse screw to rotate. A ball nut is fixed to the guide plate 242, which is connected to the transverse screw through the ball nut. The rotation of the transverse screw drives the guide plate 242 to move laterally. The linear guide is fixed to the inner wall of the selection box. A slider is fixed to the guide plate 242, which is slidably connected to the linear guide via the slider. The guide plate 242 is fixedly connected to a guide sleeve 243 on one side close to the adjusting plate 244 . The adjusting plate 244 is rotatably connected to the guide sleeve 243 . The guide plate 242 can drive the adjusting plate 244 to move laterally through the guide sleeve 243 .

[0025] A spline is provided on the outer side of the power shaft 213, and the adjusting disk 244 is sleeved on the outer side of the power shaft 213, and a spline groove is provided on the inner side. The adjusting disk 244 is slidingly connected to the power shaft 213 through the spline fitting. The spline fitting enables the adjusting disk 244 to rotate synchronously with the power shaft 213.

[0026] The seed storage box 23 is fixed to the inner wall of the seed selection box, and the vacuum plate 22 is fixed to the seed storage box 23 by bolts. A placement groove is opened on the inner side of the seed storage box 23, and the seed plate 25 is placed on the inner side of the placement groove.

[0027] The seed tray 25 has an air-blocking groove on one end near the seed storage box 23, and a ventilation groove and a guide chute on the side away from the seed storage box 23, both of which are connected to the air-blocking groove. A sesame filter 27 is mounted inside the ventilation groove. A ruler clamp 26 is slidably connected to the guide chute and comprises an air-blocking plate 261, an inner pressure ramp 262, and an outer pressure ramp 263. The air-blocking plate 261 is located inside the air-blocking groove. As the air-blocking plate 261 slides radially inward along the seed tray 25, it blocks the sesame filter 27, gradually reducing the contact area between the sesame filter 27 and the seed storage box 23 (the remaining unblocked portion of the sesame filter 27 constitutes the seed chamber). As the air-blocking plate 261 slides radially outward along the seed tray 25, it reduces the blockage of the sesame filter 27, gradually increasing the contact area between the sesame filter 27 and the seed storage box 23. An inner concave ring and an outer convex ring are provided on the outer side of the adjusting disk 244. The outer convex ring of the adjusting disk 244 abuts against the inner pressure inclined plate 262, and the outer convex ring of the adjusting disk 244 abuts against the outer pressure inclined plate 263. When the adjusting disk 244 moves toward the seed storage box 23, the outer convex ring squeezes the inner pressure inclined plate 262, so that the ruler clamp 26 slides inward along the radial direction of the seed disk 25; when the adjusting disk 244 moves away from the seed storage box 23, the inner concave ring squeezes the outer pressure inclined plate 263, so that the ruler clamp 26 slides outward along the radial direction of the seed disk 25.

[0028] An arc-shaped air guide groove 221 is provided on the inner wall of the vacuum disk 22, and an external air pipe 222 is provided on the arc-shaped air guide groove 221 and passes through the vacuum disk 22. The other end of the external air pipe 222 is connected to the air pressure regulating mechanism 30 through a pipeline. The air pressure regulating mechanism 30 draws gas through the external air pipe 222, so that the external air pipe 222 and the arc-shaped air guide groove 221 are in a vacuum environment (the vacuum environment in this application refers to a low ambient air pressure, that is, the external air flow will enter the external air pipe 222 through the arc-shaped air guide groove 221); when the seed disk 25 rotates, the ventilation groove corresponding to the arc-shaped air guide groove 221 is also in a vacuum environment.

[0029] The seed storage box 23 is provided with a seed entry slot 233 and a seed discharge slot 235. The arc-shaped air guide slot 221 corresponds to the seed entry slot 233, ensuring that the sesame seeds are in a vacuum environment when entering the seed chamber, preventing them from escaping. A scraper 234 is installed in the seed entry slot 233, and the side of the seed tray 25 near the seed storage box 23 is in contact with the scraper 234. When sesame seeds adhere to the outside of the seed chamber, the scraper 234 scrapes them off, preventing excess sesame seeds from being carried out of the seed entry slot 233. After the sesame seeds in the seed chamber leave the seed entry slot 233, the ventilation slot in this part is offset from the arc-shaped air guide slot 221, and the ventilation slot no longer maintains a vacuum environment. The sesame seeds then exit the seed chamber under the action of gravity and are discharged through the seed discharge slot 235.

[0030] Several sets of ruler clips 26 and sesame screens 27 are evenly distributed on the seed tray 25. When the sesame seeds to be sown are small, the ruler clips 26 are moved inward to block the sesame screens 27, reducing the size of the seed chamber so that only one sesame seed can be stored at a time. When the sesame seeds to be sown are large, the ruler clips 26 are moved outward to reduce the blockage of the sesame screens 27, increasing the size of the seed chamber so that only one sesame seed can be stored at a time. This allows for precise control of the number of sesame seeds discharged from the seed tray 25.

[0031] A seed distributing mechanism 15 (the seed distributing mechanism 15 adopts existing technology and will not be described here) is provided between the seed selection mechanism 20 and the seed conveying mechanism 40. The seed distributing mechanism 15 delivers the seeds discharged by the seed selection mechanism 20 into different pipes.

[0032] The seed conveying mechanism 40 comprises an outer conveying box, a support frame 41, an accelerating tube 421, an air distribution shaft 431, and a uniform rotation motor 44. The support frame 41 and uniform rotation motor 44 are fixed to the inner wall of the outer conveying box. The accelerating tube 421 is fixed to the support frame 41. The air distribution shaft 431 is located inside the accelerating tube 421. The rotating shaft of the air distribution shaft 431 passes through the accelerating tube 421 and is connected to the rotating shaft of the uniform rotation motor 44. A seed inlet pipe 422 is mounted above and outside the accelerating tube 421, and a seed outlet pipe 423 is mounted below and outside the accelerating tube 421. The central axis of the seed inlet pipe 422 is collinear with the central axis of the seed outlet pipe 423. Both the seed inlet pipe 422 and the seed outlet pipe 423 are vertically arranged and offset from the central axis of the accelerating tube 421.

[0033] A seed hole 434 is provided on the outer side of the air dividing shaft 431. When the seed hole 434 is aligned with the seed inlet tube 422 and the seed outlet tube 423, the sesame seeds in the seed inlet tube 422 will enter the seed outlet tube 423 through the seed hole 434 under the action of gravity; the air dividing shaft 431 in this device is provided with a total of four seed holes 434, and the central axes of adjacent seed holes 434 are perpendicular to each other. The seed holes 434 with central axes parallel to each other are distributed on both sides of the central axis of the air dividing shaft 431, so that every time the air dividing shaft 431 rotates 90°, only one seed hole 434 will be aligned with the seed inlet tube 422 and the seed outlet tube 423. A non-through air supply groove 432 is provided at the center of the air distribution shaft 431, and an air supply groove 433 connected to the air supply groove 432 is provided on the outside of the air distribution shaft 431. The number of the air supply grooves 433 is the same as the seeding hole 434, and the two correspond one to one. The central axis of the air supply groove 433 is coplanar and perpendicular to the central axis of the seeding hole 434, and the air supply groove 433 is not connected to the seeding hole 434.

[0034] Of the two rotating shafts on the air distribution shaft 431, the one without the air supply groove 432 is connected to the rotating shaft of the uniform rotation motor 44. The other end of the rotating shaft with the air supply groove 432 is connected to a rotary joint 45. The air inlet of the rotary joint 45 is connected to the air pressure regulating mechanism 30 via a pipe. Air is supplied to the air supply groove 432 through the air pressure regulating mechanism 30 and the rotary joint 45. The lower side of the inner wall of the acceleration tube 421 is provided with a flared groove 424, which corresponds to the seed outlet tube 423 and is interconnected. After the sesame seeds pass through the seed outlet tube 423, the air distribution shaft 431 rotates 90 degrees, aligning the air supply groove 433 with the flared groove 424. Air flows through the air supply groove 433 and the flared groove 424 into the seed outlet tube 423, thereby propelling the seeds to move rapidly.

[0035] In order to facilitate pipe discharge, in the prior art, sesame seeds are transported through hoses such as plastic tubes or rubber tubes, that is, after the sesame seeds leave the seed chamber, they slide along the hose under the action of gravity; the friction coefficient of the inner wall of the hose is relatively large, and the sesame seeds are easily retained in the hose due to the large friction, which in turn causes the sesame seeds to be unable to be discharged in time; the present device supplies air through the air pressure regulating mechanism 30, and then blows the sesame seeds through the air flow, and the sesame seeds flow rapidly in the hose with the air flow, thereby preventing the sesame seeds from being retained in the hose, thereby ensuring the timely discharge of the sesame seeds and thus accurate sowing.

[0036] Example 2: See also Figure 1 、 Figure 14The present invention provides a technical solution: a sesame precision sowing device, based on the first embodiment, further includes a screening mechanism, which includes: a feeding funnel 11, a vibration box 12, a storage box 13, a distributor 14, a distribution screen 16, a discharge pipe 17 and a material blocking valve 18. A distribution bin is provided on the inner side of the vibration box 12, and a distribution screen 16 is plugged into the inner side of the distribution bin. The distribution screen 16 is detachable, which makes it convenient for users to disassemble, clean and replace the distribution screen 16 according to their needs; a protective door is installed on the outer side of the vibration box 12, and the distribution screen 16 is squeezed through the protective door to prevent the distribution screen 16 from being displaced. The lower end of the feeding funnel 11 is connected to the feeding bin of the vibration box 12. The sesame seeds in the feeding funnel 11 will fall onto the feeding screen 16 in the feeding bin under the action of gravity. When this device is fixed to the sowing equipment, as the sowing equipment works, the vibration of the sowing equipment will drive the vibration box 12 and the feeding screen 16 to vibrate, thereby screening the sesame seeds on the feeding screen 16. The storage box 13 is provided with several groups of storage bins. The storage bins in the storage box 13 are connected to the feeding bins of the vibration box 12. Each storage bin has a corresponding connection position, so that the sesame seeds screened by each feeding screen 16 can flow into the corresponding storage bin under the action of gravity. The bottom of each storage bin is connected to a discharge pipe 17, and the discharge pipe 17 is provided with a blocking valve 18. After the blocking valve 18 is opened, the sesame seeds in the storage bin can be discharged from the discharge pipe 17 under the action of gravity. The separator 14 (using existing technology and not described in detail here) primarily distributes the seeds discharged from the discharge pipe 17 to the seed storage boxes 23 of different seed selection mechanisms 20. Sesame seeds of different sizes are sorted by the sorting screen 16, reducing manual labor. When the separator 14 distributes the sesame seeds, the seeds discharged from different discharge pipes 17 enter different seed selection mechanisms 20, thus preventing sesame seeds of different sizes from mixing.

[0037] Example 3: See also Figure 8 The present invention provides a technical solution: a sesame precision sowing device, based on the first embodiment, the seed storage box 23 is divided into a seed entry slot 233 and a transfer bin 231, and the transfer bin 231 is provided with a seed passing slot 232 on one side close to the seed entry slot 233, and the transfer bin 231 and the seed entry slot 233 are connected through the seed passing slot 232, and the seed passing slot 232 is located at the lower side of the transfer bin 231; sesame seeds are stored in the transfer bin 231, and a small amount of sesame seeds will slide out of the seed passing slot 232 under the action of gravity and enter the seed entry slot 233. The double-bin setting of the seed entry slot 233 and the transfer bin 231 makes it possible for not too many sesame seeds to enter the seed entry slot 233, thereby facilitating the excess sesame seeds adhering to the seed tray 25 to fall off by themselves under the action of gravity.

[0038] Example 4: See also Figure 12 The present invention provides a technical solution: a sesame precision sowing device, based on the first embodiment, further defines the air pressure regulating mechanism 30; the air pressure regulating mechanism 30 includes: an air pressure chassis, a cam bracket 311, an air cylinder bracket plate 312, an air supply motor 321, a cam 322, a connecting rod 323, a guide slide bar 331, a guide slide plate 332, a piston rod 341, an air cylinder sleeve 342, an air intake pipe 343, an air outlet pipe 344, a one-way valve 345, and an air storage tank 346.

[0039] The cam bracket 311, the air cylinder support plate 312, the air supply motor 321, the guide slide 331, and the air storage tank 346 are all fixed to the inside of the air compressor housing. The rotating shaft of the cam 322 is connected to the cam bracket 311 via a bearing, and the rotating shaft of the air supply motor 321 is connected to the rotating shaft of the cam 322. The outer side of the cam 322 is hinged to the connecting rod 323, the other end of which is hinged to the guide slide 332. The guide slide 331 is configured in a dovetail shape, with a dovetail groove defined on the underside of the guide slide 332. The guide slide 332 is slidably connected to the guide slide 331 through the dovetail groove. The air cylinder sleeve 342 is mounted on the air cylinder support plate 312. The piston rod 341 is inserted into the inner side of the air cylinder sleeve 342 and is sealed against the inner wall of the air cylinder sleeve 342 via a piston. The extended end of the piston rod 341 is connected to the guide slide 332. The outside of the cylinder sleeve 342 is connected to an intake pipe 343 and an outlet pipe 344. Both the intake pipe 343 and the outlet pipe 344 are provided with a one-way valve 345. The one-way valve 345 allows external air to enter the cylinder sleeve 342 only through the intake pipe 343; the gas in the cylinder sleeve 342 can only be discharged through the outlet pipe 344. The other end of the intake pipe 343 is connected to the external air pipe 222, thereby providing a vacuum environment for the external air pipe 222; the other end of the outlet pipe 344 is connected to the rotary joint 45, thereby supplying air to the rotary joint 45. In this device, the air supply motor 321 drives the cam 322 to rotate. When the cam 322 rotates, it drives the guide slide 332 to move back and forth through the connecting rod 323. The guide slide 332 drives the piston rod 341 to move back and forth, thereby generating the intake and exhaust actions. The air intake and exhaust actions of the air pressure regulating mechanism 30 in the device are both used for the sowing of sesame seeds, thereby improving the utilization rate of energy.

[0040] There are at least two sets of connecting rods 323, piston rods 341 and cylinder sleeves 342 in an air pressure regulating mechanism 30, and the two sets of piston rods 341 move in opposite directions during operation, that is, when one set of piston rods 341 is in the intake action, the other set of piston rods 341 is in the exhaust action, so that the exhaust and intake in the air pressure regulating mechanism 30 are not interrupted.

[0041] The air tank 346 is located between the air outlet pipe 344 and the rotary joint 45, that is, the air outlet pipe 344 is first connected to the air tank 346, and then the exhaust port of the air tank 346 is connected to the rotary joint 45; the external air supply equipment is connected to the air tank 346 through a pipeline. When the air pressure regulating mechanism 30 does not supply enough air, the external air supply equipment can supply air.

[0042] Embodiment 5: See also Figure 1 、 Figure 13 The present invention provides a technical solution: a sesame precision sowing device, based on the first embodiment, further comprising: a valve motor 50 and a seed limiting valve 60; the valve motor 50 and the seed limiting valve 60 are both fixed to the sowing equipment. The rotating shaft of the valve motor 50 is connected to the valve stem of the seed limiting valve 60, and the valve stems of several seed limiting valves 60 are coaxially connected and driven by one valve motor 50; each seed limiting valve 60 corresponds to a seed outlet tube 423. When only one sesame seed is needed for sowing at a time, the valve motor 50 controls the seed limiting valve 60 to be in a normally open state; when only two or more sesame seeds are needed for sowing at a time, when a sufficient number of sesame seeds have fallen into the seed limiting valve 60, the valve motor 50 controls the seed limiting valve 60 to open, so that all the sesame seeds in the seed limiting valve 60 are discharged.

[0043] The seed limiting valve 60 includes an air diffusion pipe 61 , an open pipe 62 , a valve body 63 , a valve core 64 , a seed dropping pipe 65 and a feed pipe 66 . One end of the feed pipe 66 is connected to the seed outlet pipe 423 through a hose, and the other end of the feed pipe 66 is connected to the inner cavity of the open pipe 62. The inner cavity of the open pipe 62 is large, and the air flow will slow down after entering the open pipe 62. At this time, the sesame seeds will fall onto the valve core 64 under the action of gravity; the upper side of the open pipe 62 is connected to the air diffusion pipe 61, and the air diffusion pipe 61 is provided with a dustproof net; the lower side of the open pipe 62 is connected to the valve body 63, and the inner side of the valve body 63 is rotatably connected to the valve core 64, and the inner side of the valve body 63 is provided with an arc groove; the valve core 64 is arranged in a cylindrical shape, and an inoculation groove is provided on its outer side. The edge part of the inoculation groove is tangent to the arc groove, so that when the valve core 64 is closed, there is no gap between the upper part of the valve core 64 and the inner wall of the valve body 63, so that the sesame seeds can only fall into the inoculation groove. When valve core 64 is closed, the air in open tube 62 is discharged from air diffusion tube 61. When valve core 64 is open, part of the air is discharged from air diffusion tube 61, and part of the air is discharged from seed dropping tube 65. After the air flow is divided, the air flow rate is reduced, thereby preventing the seeds discharged from seed dropping tube 65 from being blown away. Seed dropping tube 65 is arranged vertically to prevent sesame seeds from sticking to seed dropping tube 65. An adapter plate is installed on the outside of valve body 63, and valve body 63 is fixed to the sowing equipment through the adapter plate. The valve stem on valve core 64 passes through valve body 63.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure signs in the claims should not be regarded as limiting the claims involved.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sesame precision sowing device, characterized in that: include: A seed selection mechanism (20), an air pressure regulating mechanism (30), and a seed conveying mechanism (40); The seed selection mechanism (20) comprises: a seed storage box (23), a power shaft (213) and a guide disk (242), as well as a stepping motor (211) for driving the power shaft (213) to rotate, and a lateral driving mechanism (241) for driving the guide disk (242) to move lateraly; the outer side of the guide disk (242) is connected to a guide sleeve (243), and the other end of the guide sleeve (243) is movably connected to an adjustment disk (244); the power shaft (213) passes through the guide sleeve (243) and the adjustment disk (244), and the adjustment disk (244) is slidably connected to the power shaft (213); A vacuum disk (22) is installed on the outside of the seed storage box (23), one end of the power shaft (213) extends into the inside of the vacuum disk (22) and is connected to the seed disk (25), and the seed disk (25) corresponds to the seed storage box (23); an air blocking groove is provided on one side of the seed disk (25), and a ventilation groove and a guide chute connected to the air blocking groove are provided on the other side, a ruler clamp (26) is inserted into the inside of the guide chute, and a sesame filter (27) is provided on the inside of the ventilation groove; an arc-shaped air guide groove (221) is provided on the inside of the vacuum disk (22), and an external air pipe (222) is provided on the arc-shaped air guide groove (221) and passes through the vacuum disk (22), and the other end of the external air pipe (222) is connected to the suction end of the air pressure regulating mechanism (30); The ruler clamp (26) includes an air baffle (261), an inner pressure inclined plate (262) and an outer pressure inclined plate (263); an outer convex ring abutting against the inner pressure inclined plate (262) and an inner concave ring abutting against the outer pressure inclined plate (263) are provided on the outer side of the regulating disk (244); when the inner concave ring squeezes the outer pressure inclined plate (263), the ruler clamp (26) slides outward along the radial direction of the seed disk (25); when the outer convex ring squeezes the inner pressure inclined plate (262), the ruler clamp (26) slides inward along the radial direction of the seed disk (25); the air baffle (261) is movably plugged into the inner side of the air baffle groove and blocks the outer side of the sesame filter (27), and the air baffle (261) slides along the radial direction of the seed disk (25), which changes the blocking area of the sesame filter (27); The seed delivery mechanism (40) comprises: an accelerating tube (421), an air distribution shaft (431), and a uniform rotation motor (44) for driving the air distribution shaft (431) to rotate; the outer side of the accelerating tube (421) is provided with a seed inlet tube (422) and a seed outlet tube (423), wherein the seed inlet tube (422) is located above the seed outlet tube (423); the air distribution shaft (431) is located on the inner side of the accelerating tube (421), and the air distribution shaft (431) is provided with a delivery shaft in the axial direction. The air groove (432) and the air distribution shaft (431) are provided with an air supply groove (433) connected to the air supply groove (432) and a seed hole (434) corresponding to the seed tube (423) on the outside; when the seed hole (434) is aligned with the seed tube (423), the air supply groove (433) and the seed tube (423) are misaligned; when the air supply groove (433) corresponds to the seed tube (423), the seed hole (434) and the seed tube (423) are misaligned; One end of the rotating shaft of the air distribution shaft (431) containing the air delivery groove (432) is connected to a rotary joint (45), and the exhaust end of the air pressure regulating mechanism (30) is connected to the other end of the rotary joint (45) through a pipeline; the discharge end of the seed selection mechanism (20) corresponds to the seed inlet pipe (422).

2. The sesame precision sowing device according to claim 1, characterized in that: The accelerating tube (421) includes four groups of seed inlet tubes (422) and seed outlet tubes (423), and the connecting line of each group of seed inlet tubes (422) and seed outlet tubes (423) deviates from the central axis of the accelerating tube (421); The gas distribution shaft (431) includes four groups of seed holes (434) and gas adding grooves (433), and the central axes of the gas adding grooves (433) in the same group are coplanar and perpendicular to the central axes of the seed holes (434); the central axes of adjacent seed holes (434) are perpendicular to each other, and the seed holes (434) with parallel central axes are distributed on both sides of the central axis of the gas distribution shaft (431).

3. The sesame precision sowing device according to claim 1, characterized in that: It also includes a feeding funnel (11), wherein a vibration box (12) is provided at the lower end of the feeding funnel (11), and a storage box (13) is provided at the lower side of the vibration box (12); The inner side of the vibration box (12) is detachably connected to a material dividing screen (16), and the inner side of the storage box (13) is provided with a plurality of storage bins for storing seeds screened by the material dividing screen (16), and the lower side of each storage bin is connected to a discharge pipe (17), and a material blocking valve (18) is provided on the discharge pipe (17).

4. The sesame precision sowing device according to claim 1, characterized in that: The air pressure regulating mechanism (30) comprises a cam bracket (311), a guide slide rod (331) and a cylinder sleeve (342); one end of the cam bracket (311) is movably connected to a cam (322); and the rotating shaft of the cam (322) is connected to an air supply motor (321) that drives the cam (322) to rotate. The outer side of the cam (322) is hinged with a connecting rod (323), the other end of the connecting rod (323) is hinged with a guide slide (332), and the guide slide (332) is slidably connected to the guide slide (331); the inner side of the cylinder sleeve (342) is plugged with a piston rod (341), and the other end of the piston rod (341) is connected to the guide slide (332); The outside of the cylinder sleeve (342) is connected to an air intake pipe (343) and an air outlet pipe (344), and both the air intake pipe (343) and the air outlet pipe (344) are provided with a one-way valve (345).

5. The sesame precision sowing device according to claim 4, characterized in that: The number of the piston rods (341) and the cylinder sleeves (342) is at least two sets, and there are two sets of piston rods (341) whose air intake and exhaust actions are in opposite states.

6. The sesame precision sowing device according to claim 1, characterized in that: It also includes a valve motor (50) and a plurality of seed limiting valves (60), wherein the rotating shaft of the valve motor (50) is connected to the valve stem of the seed limiting valve (60), and the valve stems of the plurality of seed limiting valves (60) are connected to each other.

7. The sesame precision sowing device according to claim 6, characterized in that: The seed limiting valve (60) comprises a valve body (63) and a valve core (64), and an inoculation groove is provided on the outside of the valve core (64); the lower side of the valve body (63) is connected to a vertically arranged seed dropping tube (65).

8. The sesame precision sowing device according to claim 7, characterized in that: An open pipe (62) is provided on the upper side of the valve body (63), and an air diffusion pipe (61) is provided on the upper side of the open pipe (62); a feed pipe (66) is provided on the outer side of the open pipe (62), and the inner diameter of the open pipe (62) is larger than the inner diameter of the feed pipe (66).

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