Air-blowing type precision seeder and method

Abstract

The invention relates to an air-blowing type precision seeder and a method, and belongs to the technical field of agricultural seeding machinery. According to the technical scheme, the device comprises an air-blowing seed-metering device (2), a seed box (104), a furrow plough, a depth wheel, a seed pressing wheel (307) and a press wheel which are arranged on a cross beam of the seeder, the furrow plough, the depth limiting wheel, the seed pressing wheel and the press wheel are sequentially arranged below the seeding machine cross beam in the advancing direction; the bottom of the seed box is connected with the air-blowing seed sowing device, the air-blowing seed sowing device is connected with a sowing bent pipe (312) through a sowing connecting pipe, the sowing bent pipe is bent backwards in the advancing direction, an outlet ray of the sowing bent pipe is tangent to the seed pressing wheel, and an outlet of the sowing bent pipe is close to the seed pressing wheel and is close to the ground. The device has the beneficial effects that the distance from the seeding elbow to the ground is reduced, the falling speed of seeds from the seeding elbow to the ground is increased, and uniform seeding plant spacing and accurate row spacing are ensured; meanwhile, the outer ring of the seed pressing wheel is tangent to the sowing bent pipe, so that the ejected seeds can be compacted by the seed pressing wheel immediately, and the seeds are prevented from falling to the ground and bouncing.

Description

Technical Field

[0001] This invention relates to an air-blowing precision seeder and method, belonging to the field of agricultural seeding machinery technology. Background Technology

[0002] A seeder is a planting machine that sows crop seeds. It is used for a specific type or type of crop and is often named after the crop variety, such as a corn seeder, cotton seeder, or hay spreader. However, the optimal sowing speed for seeders is currently 6 to 8 kilometers per hour. Increasing the sowing speed in traditional finger-mounted or air-suction seeders results in corn seeds falling slowly from the seed pipe to the ground, and the seeds bounce after landing, leading to uneven plant spacing and inaccurate row spacing.

[0003] Air-blowing precision high-speed seeders use compressed air to suck seeds into the suction holes of a rotating seed disc and transport them to the seed tube for sowing. They offer advantages such as high efficiency and high sowing precision, processing a large number of seeds per hour and saving labor and time costs. Existing air-blowing precision high-speed seeders have the following structure: the rotating seed disc of the air-blowing precision seeder is rotatably connected to the high-pressure side housing. The gap between the high-pressure side housing and the rotating seed disc forms an annular air pressure leakage gap. A high-pressure holding structure prevents gas leakage from the annular air pressure leakage gap, allowing high-pressure air entering the high-pressure air chamber to exit through the suction holes, forming a working airflow. This causes the suction holes on the high-pressure air chamber side to exert an adsorption force on the seeds, transporting the adsorbed seeds to the seed tube through the rotation of the seed disc for sowing. For example, patent CN114287210B discloses a precision corn seeder. However, the seed distribution structure of existing air-blowing precision high-speed seeders is unreasonable. During high-speed sowing, the seeds fall a long distance from the seed tube to the ground at a slow speed, resulting in uneven plant spacing and inaccurate row spacing. The mismatch between the sowing guide tube and the seed pressing wheel, causing the seeds to bounce after landing, is also one of the main reasons for the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an air-blown precision seeder and method that reduces the distance from the sowing bend to the ground, increases the falling speed of seeds from the sowing bend to the ground, and ensures uniform plant spacing and accurate row spacing. At the same time, the outer ring of the seed pressing wheel is arranged tangentially to the sowing bend, so that the ejected seeds can be immediately compacted by the seed pressing wheel, preventing the seeds from bouncing when they fall to the ground, thus solving the above-mentioned technical problems existing in the prior art.

[0005] The technical solution of this invention is: An air-blown precision seeder includes an air-blown seed metering device, a seed box, a furrowing plow, a depth limiting wheel, a seed pressing wheel, and a press wheel mounted on the seeder's crossbeam. The furrowing plow, depth limiting wheel, seed pressing wheel, and press wheel are arranged sequentially below the seeder's crossbeam along the forward direction. The bottom of the seed box is connected to the air-blown seed metering device, which is connected to a sowing bend via a sowing connecting pipe. The sowing bend bends backward in the forward direction, and its outlet ray is tangent to the seed pressing wheel. The outlet of the sowing bend is close to the seed pressing wheel and close to the ground.

[0006] The air-blowing seed metering device includes an air-blowing seed metering device housing, and the air inlet of the air-blowing seed metering device housing is connected to the air blower assembly.

[0007] The air-blowing seed metering device has an air distribution plate at the air inlet inside its housing. A drive shaft is located in the middle of the housing, and a seed tray fixing seat is located at the threaded end of the drive shaft. A seed tray is fixedly fitted onto the seed tray fixing seat. The seed tray has guide holes evenly distributed around its circumference. An adjusting handle is rotatably mounted on the outer side of the housing corresponding to the air inlet via a rotating shaft. An adjusting shaft is movably fitted onto the adjusting handle at a location inside the housing corresponding to the adjusting shaft. An adjusting arc-shaped frame is slidably engaged inside the housing corresponding to one side of the adjusting shaft. The bottom of the adjusting arc-shaped frame is movably fitted onto the air-blowing seed metering device. On the raised platform inside the outer shell of the device, seed-shaving wheels are evenly distributed on the outer side of the adjusting arc frame. A sowing inner tube is inserted and installed on one side of the bottom of the inner side of the air-blowing seed metering device. A sowing connecting tube is sleeved at the bottom of the sowing inner tube. A sowing bend is sleeved at the bottom of the sowing connecting tube. An exhaust cover is snapped on the front end of the air-blowing seed metering device by a snap-lock. A vortex rotating inner liner is provided inside the exhaust cover. A support frame is provided on the outer side of the vortex rotating inner liner. The support frame is divided into upper and lower parts. The upper part is equipped with a closed air wheel that rotates through the closed air wheel shaft at the top position of the sowing inner tube. The lower part is equipped with a seed cleaning wheel that rotates through the seed cleaning wheel seat.

[0008] The exhaust cover slot is connected to the inner cavity of the air-blowing seed metering device. The top side of the seeding inner tube slides against the side of the seed tray. The outer side of the air-sealing wheel rotates against the back of the seed tray. The outer diameter end of the seed cleaning wheel is provided with a protruding cone that completely passes through the seed guide hole on the corresponding seed tray. The protruding cone at the outer diameter end of the seed cleaning wheel meshes with the seed guide hole of the seed tray and rotates. Three seed-shaving wheels are evenly distributed on the outer side of the adjusting arc frame. The end face of the seed-shaving wheel rotates against the seed guide hole of the seed tray.

[0009] A valve plate base is fixedly installed inside the housing of the air-blowing seed meter. A valve plate is provided on the upper layer of the valve plate base. The upper end of the valve plate passes through a round hole opened on the outside of the air-blowing seed meter and is sealed by a valve plate sealing seat. An arc handle is provided on the upper end of the valve plate for easy pulling. An air distribution plate is provided at the air inlet inside the air-blowing seed meter and the upper layer of the valve plate. A valve plate pressure plate is provided at the lower end of the valve plate.

[0010] The bottom of the air-blown seed metering device housing is provided with a slag discharge sealing plate, and the bottom of the air-blown seed metering device housing is also provided with a fixing seat.

[0011] A mounting bracket is fixedly installed at equal intervals on the outer side of the seeder beam, corresponding to the bottom position of the air conveying pipe. One side of the mounting bracket is movably mounted to one end of a four-bar linkage adjustment mechanism via a connecting bolt. A single-unit frame is movably mounted to the other end of the four-bar linkage adjustment mechanism via a connecting bolt. Connecting swing arms are movably mounted on both sides of the single-unit frame via bolts. The ends of the connecting swing arms are rotatably connected to a depth-limiting wheel via bolts. The inner side of the depth-limiting wheel is rotatably connected to a seeding tray at the position corresponding to the outer side of the sowing bend. Two symmetrical seed box frames are symmetrically mounted on the upper end of the single-unit frame via bolts. Seed boxes are fixedly mounted on the inner side of the seed box frames via bolts. An air-blowing seed metering device is fixedly mounted on the bottom of the seed boxes via bolts. A press suspension is movably mounted on the rear end of the single-unit frame via a connecting bolt. A tension spring is snapped between the press suspension and the press suspension. The press suspension is internally mounted with a press wheel seat via bolts. Press wheels are rotatably mounted on both ends of the press wheel seat via bolts. The single frame is fixedly connected to the press suspension with a seed pressing wheel frame via bolts. The inner sides of the two side plates of the seed pressing wheel frame are rotatably connected with seed pressing wheels via bolts. The outer middle of the outer shell of the air-blown seed meterer is fixedly mounted with a drive shaft seat via bolts. One end of the drive shaft is fixedly mounted on the drive shaft seat. The middle hole of one end of the drive shaft is inserted into the drive shaft of the air-blown seed meterer. The other end of the drive shaft is fixedly mounted on the mounting bracket via a shaft head bracket. The ground wheel frame, the plant spacing adjustment box, and the center hole of the other end of the drive shaft are connected on the same axis via a square shaft to transmit power.

[0012] A method for sowing using the aforementioned air-blowing precision seeder involves the following steps: seeds in the seed box are ejected through the air-blowing seed metering device, a seeding connecting pipe, and a seeding bend. The exit ray of the seeding bend is tangent to the seed pressing wheel, ensuring that the seeds ejected from the exit of the seeding bend are immediately compacted by the seed pressing wheel, preventing them from bouncing off the ground. The exit of the seeding bend is close to the seed pressing wheel and the ground, reducing the distance between the seeding bend and the ground, increasing the falling speed of the seeds from the seeding bend to the ground, and ensuring uniform plant spacing and accurate row spacing.

[0013] During seed transportation, the transport status of the seeds is regulated by a closed-loop wheel, a seed cleaning wheel, and a seed shaving wheel. The seed shaving wheel adjusts the number of seeds adsorbed in the seed tray guide holes to ensure that there is only one seed in each seed tray guide hole. The closed-loop wheel adjusts the ventilation volume of the seed tray guide holes to prevent intact seeds from being blown onto the seed tray and to ensure that the seeds are smoothly blown into the sowing connecting pipe. The seed cleaning wheel pushes out any remaining broken seeds in the seed tray guide holes to ensure smooth seed circulation and transportation.

[0014] The seeds are corn seeds.

[0015] This invention optimizes the seed transport process through the coordinated operation of the air blower assembly and the internal components of the air-blown seed metering device. The blower assembly, horizontal air duct, and flexible air guide create a continuous high-speed airflow within the device. This high-speed airflow, in conjunction with the seed tray and side-mounted components, transports the seeds to be sown through the inner sowing tube, connecting tube, and curved tube, sequentially planting them into the field. Simultaneously, a seed compaction wheel compacts the seeds, ensuring precise seed-to-plant spacing. The high-speed airflow propels the seeds through the connecting tube and curved tube at extremely high speeds, maintaining seed-to-plant spacing accuracy even at high seeder speeds. Furthermore, the outer ring of the seed compaction wheel is tangential to the curved tube, ensuring that the seeds ejected from the curved tube are immediately compacted, preventing them from bouncing off the ground.

[0016] The rate at which seeds are added inside the seed box is adjusted by pulling the valve plate to ensure that the number of seeds inside the air-blowing seed meterer is always within a reasonable range. Then, the position of the seed-shaving wheel installed on the adjusting arc frame is adjusted by adjusting the handle to ensure that the positional relationship between the seed-shaving wheel and the seed guide edge hole of the seed tray can reach the target position, so that only one seed is blown into the seed guide edge hole of the seed tray when sowing, thereby improving the seed utilization rate.

[0017] The beneficial effects of this invention are: reducing the distance from the sowing bend to the ground, increasing the falling speed of the seeds from the sowing bend to the ground, ensuring uniform plant spacing and accurate row spacing; at the same time, the outer ring of the seed pressing wheel is arranged tangentially to the sowing bend, so that the ejected seeds can be immediately compacted by the seed pressing wheel, preventing the seeds from bouncing when they fall to the ground. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a perspective view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the four-bar linkage adjustment mechanism and seed box structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the sowing bend and the seed pressing wheel structure according to an embodiment of the present invention; Figure 5This is a schematic diagram of the air-blowing seed metering device and seed box structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the air-blowing seed metering device according to an embodiment of the present invention; Figure 7 This is an exploded view of the air-blowing seed metering device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the seed-shaving wheel structure of the air-blowing seed metering device according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the working of the seed-shaving wheel of the air-blowing seed metering device according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the closed air wheel operation of the air-blowing seed metering device according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the working operation of the seed cleaning wheel of the air-blowing seed metering device according to an embodiment of the present invention; In the diagram: 1. Air blower assembly; 2. Air-blown seed metering device; 3. Four-bar linkage adjustment mechanism; 101. Air inlet hood; 102. Horizontal air supply pipe; 103. Air guide hose; 104. Seed box; 105. Sealed top cover; 106. Seeding connection pipe; 107. Air-blown seed metering device housing; 108. Valve plate; 109. Air inlet of the air-blown seed metering device; 110. Adjustment handle; 111. Fixing base; 112. 113. Slag discharge sealing plate; 114. Drive shaft; 115. Seed tray; 116. Seed tray fixing seat; 117. Exhaust cover; 118. Twist lock; 119. Vortex rotary inner liner; 120. Support frame; 121. Air-sealing wheel; 122. Air-sealing wheel shaft; 123. Seed cleaning wheel seat; 124. Seed cleaning wheel; 125. Valve pull plate bottom plate; 126. Air distribution plate; 127. Valve pull plate sealing seat; 128. Seeding inner tube 128. Valve plate pressure plate; 129. Adjustable arc frame; 130. Seed shaving wheel; 201. Seeder crossbeam; 202. Drive wheel transmission mechanism; 203. Plant spacing adjustment box; 204. Square shaft; 205. Drive shaft; 206. Shaft head bracket; 207. Drive shaft seat; 208. Fan frame; 209. Traction frame; 301. Mounting bending frame; 302. Parallel connecting rod; 303. Ground pressure spring 304. Single frame; 305. Seed box frame; 306. Depth limiting wheel; 307. Seed pressing wheel; 308. Seed pressing wheel frame; 309. Pressing suspension; 310. Pressing wheel; 311. Seeding tray; 312. Seeding bend; 313. Connecting swing arm; 314. Tension spring; 315. Pressing wheel seat; 316. Furrowing plow; 317. Seed guide side hole; 318. Raised cone; 319. Corn seed. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] An air-blown precision seeder includes an air-blown seed metering device 2, a seed box 104, a furrowing plow 316, a depth limiting wheel 306, a seed pressing wheel 307, and a press wheel 310, all mounted on a seeder beam 201. The furrowing plow 316, depth limiting wheel 306, seed pressing wheel 307, and press wheel 310 are arranged sequentially below the seeder beam 201 along the forward direction. The bottom of the seed box 104 is connected to the air-blown seed metering device 2, which is connected to a sowing bend 312 via a sowing connecting pipe 106. The sowing bend 312 bends backward in the forward direction, and its outlet ray is tangent to the seed pressing wheel 307. The outlet of the sowing bend 312 is close to the seed pressing wheel 307 and close to the ground.

[0021] The air-blowing seed metering device 2 includes an air-blowing seed metering device housing 107, and the air inlet of the air-blowing seed metering device housing 107 is connected to the air blower assembly 1.

[0022] An air distribution plate 125 is provided at the air inlet inside the air-blowing seed metering device housing 107. A drive shaft 113 is provided in the middle of the air-blowing seed metering device housing 107. A seed disc fixing seat 115 is provided at the threaded end of the drive shaft 113. A seed disc 114 is fixedly sleeved on the seed disc fixing seat 115. The seed disc 114 has seed guide side holes 317 evenly distributed along the circumferential direction. An adjusting handle 110 is rotatably installed on the outside of the air-blowing seed metering device housing corresponding to the position of the air-blowing seed metering device air inlet 109 via a rotating shaft. An adjusting shaft is movably sleeved on the adjusting handle 110 corresponding to the position inside the air-blowing seed metering device housing. An adjusting arc frame 129 is slidably engaged inside the air-blowing seed metering device housing 107 corresponding to the position of the adjusting shaft. The bottom of the adjusting arc frame 129 is movably sleeved inside the air-blowing seed metering device housing 107. On the raised platform of the part, seed-shaving wheels 130 are evenly distributed on the outer side of the adjusting arc frame 129. A sowing inner tube 127 is inserted and installed on one side of the bottom of the inner side of the air-blowing seed metering device shell 107. A sowing connecting tube 106 is sleeved at the bottom end of the sowing inner tube 127. A sowing bend tube 312 is sleeved at the bottom of the sowing connecting tube 106. An exhaust cover 116 is snapped on the front end of the air-blowing seed metering device shell 107 by a snap-lock. A vortex rotating inner liner 118 is provided inside the exhaust cover 116. A support frame 119 is provided on the outer side of the vortex rotating inner liner 118. The support frame 119 is divided into upper and lower parts. The upper part is rotatably installed with an air-closing wheel 120 through an air-closing wheel shaft 121 at the top position of the sowing inner tube 127. The lower part is rotatably installed with a seed cleaning wheel 123 through a seed cleaning wheel seat 122.

[0023] The slot of the exhaust cover 116 is connected to the inner cavity of the air-blowing seed metering device housing 107. The top side of the seeding inner tube 127 slides and fits against the side of the seed tray 114. The outer side of the air-closing wheel 120 fits and rotates against the back of the seed tray 114. The outer diameter end of the seed cleaning wheel 123 is provided with a protruding cone 318, which completely passes through the seed guide edge hole 317 on the corresponding seed tray. The protruding cone 318 at the outer diameter end of the seed cleaning wheel meshes and rotates with the seed guide edge hole 317 of the seed tray. Three seed-shaving wheels 130 are evenly distributed on the outer side of the adjusting arc frame 129. The end face of the seed-shaving wheel 130 fits and rotates against the seed guide edge hole 317 of the seed tray 114.

[0024] A valve plate base plate 124 is fixedly installed inside the air-blowing seed meter housing 107. A valve plate 108 is provided on the upper layer of the valve plate base plate 124. The upper end of the valve plate 108 passes through a round hole opened on the outside of the air-blowing seed meter housing 107 and is sealed by a valve plate sealing seat 126. An arc handle is provided on the upper end of the valve plate 108 for easy pulling. An air distribution plate 125 is provided on the upper layer of the valve plate 108 and at the air inlet inside the air-blowing seed meter housing 107. A valve plate pressure plate 128 is provided on the lower end of the valve plate 108.

[0025] The bottom end of the air-blown seed metering device housing 107 is provided with a slag discharge sealing plate 112, and the bottom end of the air-blown seed metering device housing 107 is also provided with a fixing seat 111.

[0026] A mounting bracket 301 is fixedly installed at equal intervals on the outer side of the seeder beam 201, corresponding to the bottom position of the air conveying pipe 102. One side of the mounting bracket 301 is movably mounted to one end of a four-bar linkage adjustment mechanism 3 via a connecting bolt. A single frame 304 is movably mounted to the other end of the four-bar linkage adjustment mechanism 3 via a connecting bolt. Connecting swing arms 313 are movably mounted on both sides of the single frame 304 via bolts. The ends of the connecting swing arms 313 are rotatably connected to a depth limiting wheel 306 via bolts. The inner side of the depth limiting wheel 306 is rotatably connected to a seeding disc 311 at the outer position corresponding to the sowing bend 312. Two symmetrical seed box frames 305 are symmetrically mounted on the upper end of the single frame 304 via bolts. Seed boxes 104 are fixedly mounted on the inner side of the seed box frames 305 via bolts. An air-blowing seed metering device 2 is fixedly mounted to the bottom of the seed box 104 via bolts. A press suspension 309 is movably mounted on the rear end of the single frame 304 via a connecting bolt. The single frame 304 and the press suspension... A tension spring 314 is snapped between the pressure suspension frames 309. A pressure wheel seat 315 is movably mounted inside the pressure suspension frame 309 via bolts. Pressure wheels 310 are rotatably mounted on both ends of the pressure wheel seat 315 via bolts. A seed pressing wheel frame 308 is fixedly connected to the connection end of the single frame 304 and the pressure suspension frame 309 via bolts. Seed pressing wheels 307 are rotatably connected to the inner sides of the two side plates of the seed pressing wheel frame 308 via bolts. The outer center of the air-blown seed metering device housing 107 is open... The drive shaft seat 207 is fixedly installed with bolts. One end of the drive shaft 205 is fixedly installed in the drive shaft seat 207. The middle hole of one end of the drive shaft 205 is inserted into the drive shaft of the air-blowing seed metering device. The other end of the drive shaft 205 is fixedly installed on the mounting bracket 301 through the shaft head bracket 206. The ground wheel frame, the plant spacing adjustment box 203 and the center hole of the other end of the drive shaft 205 are on the same axis and connected by a square shaft 204 to transmit power.

[0027] A method for sowing using the aforementioned air-blowing precision seeder involves the seeds in the seed box being ejected through the air-blowing seed metering device 2 via the sowing connecting pipe 106 and the sowing bend 312. The exit ray of the sowing bend 312 is tangent to the seed pressing wheel 307, ensuring that the seeds ejected from the exit of the sowing bend 312 are immediately compacted by the seed pressing wheel, preventing the seeds from bouncing off the ground. The exit of the sowing bend 312 is close to the seed pressing wheel 307 and close to the ground, reducing the distance between the sowing bend and the ground, increasing the falling speed of the seeds from the sowing bend to the ground, and ensuring uniform plant spacing and accurate row spacing.

[0028] During seed transportation, the transport status of the seeds is regulated by the air-sealing wheel 120, the seed cleaning wheel 123, and the seed-shaving wheel 130. The seed-shaving wheel 130 adjusts the number of seeds adsorbed by the seed guide holes 317 of the seed tray to ensure that there is only one seed in each seed tray guide hole 317. The air-sealing wheel 120 adjusts the ventilation of the seed guide holes 317 of the seed tray to prevent intact seeds from being blown onto the seed tray and to ensure that the seeds are smoothly blown into the sowing connecting pipe 106. The seed cleaning wheel 123 pushes out any remaining broken seeds in the seed guide holes 317 of the seed tray to ensure the smooth circulation and transportation of the seeds.

[0029] In this embodiment, the seed is corn seed 319.

[0030] This invention optimizes the seed transport process through the cooperation between the air blower assembly and the internal components of the air-blowing seed metering device. The air blower assembly, the horizontal air duct 102, and the flexible air duct 103 work together to generate a continuous high-speed airflow within the air-blowing seed metering device. This high-speed airflow, in conjunction with the seed tray 114 and the various components mounted on its side, transports the seeds to be sown through the inner sowing tube 127, the sowing connecting tube 106, and the sowing bend 312, sequentially planting them into the field. Simultaneously, the seed pressing wheel 307 compacts the seeds, ensuring precise seed-to-plant spacing. The high-speed airflow propels the seeds through the sowing connecting tube 106 and the sowing bend 312 at extremely high speeds, ensuring that even at high seeder speeds, the seed-to-plant spacing accuracy remains unaffected. Furthermore, the outer ring of the seed pressing wheel 307 is tangent to the sowing bend 312, ensuring that the seeds ejected from the sowing bend are immediately compacted by the seed pressing wheel, preventing them from bouncing off the ground.

[0031] The seed addition rate inside the seed box 104 is adjusted by pulling the valve plate 108 to ensure that the seeds inside the air-blowing seed metering device are always kept within a reasonable quantity range. Then, the position of the seed-shaving wheel 130 installed on the adjusting arc frame 129 is adjusted by adjusting the handle 110 to ensure that the positional relationship between the seed-shaving wheel 130 and the seed guide edge hole of the seed tray can reach the target position, so that only one seed is blown into the seed guide edge hole of the seed tray when sowing, thereby improving the seed utilization rate.

[0032] This invention optimizes the travel adjustment process of the seeder through the coordination of the components within the four-bar linkage adjustment mechanism 3. The interaction between the parallel linkage 302, the single frame 304, and the ground pressure spring 303 reduces the vibration amplitude of the seeder's sowing components during travel, allowing the seeder components to smoothly adapt to the terrain. This effectively improves the working environment of the internal parts of the seeder components and extends the seeder's service life. The coordination between the depth limiting wheel 306 and the press wheel 310 ensures that seeds are planted at an appropriate depth. Simultaneously, the coordination between the seed pressing wheel 308 and the sowing bend 312 ensures that the seeds ejected at high speed from the sowing bend are compacted to ensure accurate plant spacing, and the press wheel covers and compacts the sown seeds.

[0033] After the air blower assembly 1 is started, the high-speed airflow discharged by the air blower enters the air blower seed meter 2 after passing through the air delivery horizontal pipe, the air guide hose and the seed meter inlet; when there are no seeds in the air blower seed meter 2, the high-speed airflow is discharged through the seed guide side hole 317 of the seed tray 114 and the sowing connection pipe 106. When the valve plate 108 is opened, the seeds enter the air-blowing seed metering device 2. The seeds are blown by the high-speed airflow into the seed guide holes 317 of the seed tray. Due to the large blowing force of the high-speed airflow, several seeds will be blown into a single hole of the seed guide hole 317 of the seed tray. When the seeds adsorbed by the seed guide holes 317 of the seed tray rotate to the position of the seed shaving wheel, the seed shaving wheel covers part of the seed guide holes 317 of the seed tray because its end face is in contact with the inner end face of the seed tray. The outer diameter end of the seed shaving wheel covers part of the seed guide holes 317 of the seed tray. The extra seeds blown into the seed guide holes 317 of the seed tray will be shaved off by the seed shaving wheel 130. After passing through three seed shaving wheels, only one seed is blown into each hole of the seed guide hole 317 of the seed tray. When the seeds blown into the seed guide hole 317 of the seed tray are transferred to the inner sowing tube, the air-closing wheel 120, which is located on the outside of the seed tray corresponding to the position of the inner sowing tube 127, blocks the seed guide hole 317. The airflow cannot pass through, and the seeds will fall out in the seed guide hole. At this time, under the action of gravity and high-speed airflow, the seeds fall smoothly into the inner sowing tube to complete the seeding operation. If the seeds blown into the seed guide edge hole 317 of the seed tray are defective seeds, when the defective seeds blown into the seed guide edge hole of the seed tray rotate through the inner sowing tube, because the size of the defective seeds is smaller than the gap between the seed guide edge hole 317 and the inner sowing tube, they cannot enter the inner sowing tube and will still be blown into the seed guide edge hole 317. When the seed tray continues to rotate and reaches the position of the seed cleaning wheel, the seed cleaning wheel has a raised cone 318 at its outer diameter end, and the raised cone completely penetrates the seed guide edge hole 317 of the seed tray. This can push out and clean the defective seeds blown into the seed guide edge hole 317. In this way, the seed guide edge hole of the seed tray will not be affected when blowing seeds again.

[0034] A traction frame 209 is fixedly installed on the middle of one side of the seeder beam 201, a drive wheel transmission mechanism 202 is fixedly installed at both ends of one side of the seeder beam, and a plant spacing adjustment box 203 is fixedly installed on the middle of the other side of the seeder beam. A fan frame 208 is fixedly connected to the top center of the seeder beam 201. An air blower assembly 1 is fixedly installed on the upper part of the fan frame 208. An air inlet cover 101 is fixedly installed at the air inlet end of the air blower assembly 1. An air conveying horizontal pipe 102 is connected to the bottom of the air blower assembly 1 through a connecting pipe. Air guide hoses 103 are evenly distributed on both sides of the lower end of the air conveying horizontal pipe 102. The other end of the air guide hoses 103 is connected to the air inlet 109 of the air blower seed metering device. An air blower seed metering device housing 107 is fixedly installed on one side of the air inlet 109. A feed inlet is provided at the upper end of the air blower seed metering device housing 107. A seed box 104 is fixedly installed at the top. A sealing top cover 105 is movably snapped onto the top of the seed box 104.

Claims

1. An air-blowing precision seeder, characterized in that: The device includes an air-blowing seed metering device (2), a seed box (104), a furrowing plow (316), a depth limiting wheel (306), a seed pressing wheel (307), and a press wheel (310) mounted on the crossbeam (201) of the seeder. The furrowing plow (316), the depth limiting wheel (306), the seed pressing wheel (307), and the press wheel (310) are arranged sequentially below the crossbeam (201) in the forward direction. The bottom of the seed box (104) is connected to the air-blowing seed metering device (2), which is connected to the sowing bend (312) through the sowing connecting pipe (106). The sowing bend (312) bends backward in the forward direction, and the outlet ray of the sowing bend (312) is tangent to the seed pressing wheel (307). The outlet of the sowing bend (312) is close to the seed pressing wheel (307) and close to the ground.

2. The air-blowing precision seeder according to claim 1, characterized in that: The air-blowing seed meter (2) includes an air-blowing seed meter housing (107), the air inlet of which is connected to the air blower assembly (1).

3. The air-blowing precision seeder according to claim 2, characterized in that: The air inlet of the air-blowing seed metering device housing (107) is provided with an air distribution plate (125). A drive shaft (113) is provided in the middle of the air-blowing seed metering device housing (107). A seed tray fixing seat (115) is provided at the threaded end of the drive shaft (113). A seed tray (114) is fixedly sleeved on the seed tray fixing seat (115). The seed tray (114) has seed guide side holes (317) evenly opened in the circumferential direction. An adjustment handle (110) is rotatably installed on the outside of the air-blowing seed metering device housing at the position corresponding to the air inlet (109) of the air-blowing seed metering device via a rotating shaft. An adjustment shaft is movably sleeved on the adjustment handle (110) at the position corresponding to the position inside the air-blowing seed metering device housing. An adjustment arc frame (129) is slidably engaged on one side of the adjustment shaft inside the air-blowing seed metering device housing (107). The bottom of the adjustment arc frame (129) is movably sleeved on the protrusion inside the air-blowing seed metering device housing (107). On the platform, seed-shaving wheels (130) are evenly distributed on the outer side of the adjusting arc frame (129). A sowing inner tube (127) is inserted and installed on one side of the bottom of the inner side of the air-blowing seed metering device shell (107). A sowing connecting tube (106) is sleeved at the bottom of the sowing inner tube (127). A sowing bend tube (312) is sleeved at the bottom of the sowing connecting tube (106). An exhaust cover (116) is snapped on the front end of the air-blowing seed metering device shell (107) by a snap-lock. A vortex rotating inner liner (118) is provided inside the exhaust cover (116). A support frame (119) is provided on the outer side of the vortex rotating inner liner (118). The support frame (119) is divided into upper and lower parts. The upper part is equipped with a closed air wheel (120) that rotates through the closed air wheel shaft (121) at the top position of the sowing inner tube (127). The lower part is equipped with a seed cleaning wheel (123) that rotates through the seed cleaning wheel seat (122).

4. The air-blowing precision seeder according to claim 3, characterized in that: The slot of the exhaust cover (116) is connected to the inner cavity of the air-blowing seed metering device housing (107). The top side of the seeding inner tube (127) slides and fits against the side of the seed tray (114). The outer side of the air-closing wheel (120) fits and rotates against the back of the seed tray (114). The outer diameter end of the seed cleaning wheel (123) is provided with a protruding cone (318). The protruding cone (318) completely passes through the inside of the seed guide edge hole (317) on the corresponding seed tray. The protruding cone (318) at the outer diameter end of the seed cleaning wheel meshes and rotates with the seed guide edge hole (317) of the seed tray. Three seed-shaving wheels (130) are evenly distributed on the outer side of the adjusting arc frame (129). The end face of the seed-shaving wheel (130) fits and rotates against the seed guide edge hole (317) of the seed tray (114).

5. The air-blowing precision seeder according to claim 4, characterized in that: A valve plate base plate (124) is fixedly installed inside the air-blowing seed meter housing (107). A valve plate (108) is provided on the upper layer of the valve plate base plate (124). The upper end of the valve plate (108) passes through a round hole opened on the outside of the air-blowing seed meter housing (107) and is sealed by a valve plate sealing seat (126). An arc handle is provided on the upper end of the valve plate (108) to facilitate pulling the valve plate (108). An air distribution plate (125) is provided on the upper layer of the valve plate (108) and at the air inlet inside the air-blowing seed meter housing (107). A valve plate pressure plate (128) is provided on the lower end of the valve plate (108).

6. The air-blowing precision seeder according to claim 5, characterized in that: The bottom of the air-blown seed metering device housing (107) is provided with a slag discharge sealing plate (112), and the bottom of the air-blown seed metering device housing (107) is also provided with a fixing seat (111).

7. A method for sowing using the air-blowing precision seeder according to any one of claims 1-6, characterized in that: After passing through the air-blowing seed meter (2), the seeds in the seed box are ejected through the seeding connecting pipe (106) and the seeding bend (312). The exit ray of the seeding bend (312) is tangent to the seed pressing wheel (307). The seeds ejected from the exit of the seeding bend (312) are immediately compacted by the seed pressing wheel to prevent the seeds from bouncing off the ground. The exit of the seeding bend (312) is close to the seed pressing wheel (307) and close to the ground, reducing the distance between the seeding bend and the ground, increasing the falling speed of the seeds from the seeding bend to the ground, and ensuring uniform plant spacing and accurate row spacing.

8. A method for sowing using an air-blowing precision seeder according to claim 7, characterized in that: During the transportation of the seeds, the transportation status of the seeds is adjusted by the air-sealing wheel (120), the seed cleaning wheel (123), and the seed-shaving wheel (130). The number of seeds adsorbed by the seed guide hole (317) of the seed tray is adjusted by the seed-shaving wheel (130) to ensure that there is only one seed in the seed guide hole (317) of each seed tray. The ventilation of the seed guide hole (317) of the seed tray is adjusted by the air-sealing wheel (120) so that the intact seeds will not be blown onto the seed tray and the seeds are smoothly blown into the sowing connecting pipe (106). The remaining broken seeds in the seed guide hole (317) of the seed tray are pushed out by the seed cleaning wheel (123).

Images