A seeder for corn planting that can plant at multiple points

Abstract

The present invention discloses a seeder for multi-point planting of corn, which relates to the technical field of agricultural equipment. It includes a sowing box and a screening device. The screening device includes a protective outer shell, a screening barrel, and a driving motor. The output end of the driving motor is fixedly provided with a connecting shaft rod, and the outer wall of the connecting shaft rod is fixedly provided with a plurality of stirring blades. A discharge port is opened on the outer wall of the screening barrel. By starting the driving motor, as the driving motor runs, it drives the stirring blades to stir inside the screening barrel. The corn seeds continuously shake inside the screening barrel under the agitation of the stirring blades. Among them, the damaged and unqualified corn seeds fall into the collection box through the sieve holes on the surface of the collection box under the agitation of the stirring blades. The design of the sieve holes allows the unqualified seeds to pass quickly, while the qualified seeds remain in the screening barrel, achieving rapid separation. The continuous agitation of the stirring blades can ensure the uniform distribution of the corn seeds during the screening process and improve the screening efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural equipment, and particularly relates to a seeder for multi-point planting in corn cultivation. Background Art

[0002] The sown area of corn ranks only second to that of rice and wheat, ranking third among food crops. With the gradual development of society, agricultural production increasingly relies on agricultural machinery and equipment for production. A corn seeder refers to a planting machine that uses corn seeds as the sowing object (while also taking into account crops such as soybeans). Usually, the name of the seeder is often prefixed with the name of the crop type, such as corn seeder, grain drill, corn hill-drop planter, cotton planter, pasture broadcaster, etc. The corn seeder has the characteristics of uniform sowing, consistent depth, stable row spacing, good soil covering, seed saving, and high work efficiency.

[0003] When many existing corn sowing devices are sowing, they often do not have the function of screening corn seeds. This may lead to problems such as uneven quality and size among the sown corn seeds, thus affecting the germination rate, growth condition, and final yield of corn. Summary of the Invention

[0004] The purpose of the present invention is to provide a seeder for multi-point planting in corn cultivation, which solves the technical problems raised in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A seeder for multi-point planting of corn, including a seeding box and a screening device. The screening device includes a protective housing, a screening barrel, and a driving motor. The output end of the driving motor is fixedly provided with a connecting shaft rod, and the outer wall of the connecting shaft rod is fixedly provided with a plurality of stirring blades. A discharge port is opened on the outer wall of the screening barrel, and a collection box is fixedly provided on the outer wall of the screening barrel. A plurality of sieve holes are opened on the outer wall of the collection box. The seeding box includes a material box and a fixed frame. A rotating shaft is fixedly provided on the top outer wall of the material box, and the outer wall of the rotating shaft is rotatably connected to one side outer wall of the fixed frame. A collection groove is opened on the top outer wall of the fixed frame. An installation seat is fixedly provided on one side outer wall of the seeding box, and a cylinder is fixedly provided on the top outer wall of the installation seat. A fixed base is fixedly provided on the bottom outer wall of the driving motor, and a movable groove is opened on the bottom outer wall of the fixed base. The output end of the cylinder is rotatably provided with a slider, and the slider is slidably connected to the movable groove. A discharge port is opened on the outer wall of the collection box away from the driving motor, and the discharge port is located at the collection groove. An adjusting plate is fixedly provided on the outer wall of the connecting shaft rod, and a plurality of limiting rods are fixedly provided on the outer wall of the adjusting plate. A plurality of connecting jacks and a barrel opening are opened on the outer wall of the screening barrel close to the driving motor, and the limiting rods correspond to the connecting jacks one by one. A connecting plate is fixedly provided on the outer wall of the adjusting plate, and a stretching rod is slidably inserted into the inner wall of the connecting plate. A attaching plate is fixedly provided on the outer wall of the stretching rod close to the connecting shaft rod, and a control handle is fixedly provided on the outer wall of the stretching rod away from the attaching plate. An elastic spring is fixedly provided between the control handle and the connecting plate. A filter plate is fixedly provided on the inner wall of the material box, and a plurality of filter holes are opened on the outer wall of the filter plate. The filter plate is inclined. A sowing opening is opened at the bottom of the inner wall of the material box. A feeding device is fixedly provided on the outer wall of the material box, and the feeding device is located at the sowing opening. A cleaning port and a discharge port are opened on the outer wall of the protective housing. A feeding bin is fixedly provided on the outer wall of the protective housing, and a feeding port is opened on the top outer wall of the feeding bin. Two limiting rings are fixedly provided on the outer wall of the screening barrel, and two sliding grooves are opened on the inner wall of the protective housing. The two sliding grooves correspond to the two limiting rings one by one. The protective housing and the screening barrel are rotationally connected through the provided sliding grooves and limiting rings. A connecting buckle is fixedly provided on the outer wall of the installation seat away from the material box, and the connecting buckle is used for vehicle docking. A support frame is fixedly provided on the bottom outer wall of the material box, and four wheels are provided on the bottom outer wall of the support frame. A cover plate is rotatably provided on the outer wall of the protective housing, and a handle is fixedly provided on the outer wall of the cover plate. The cover plate is arranged outside the cleaning port. A plurality of the stirring blades are all located inside the screening barrel. The connecting shaft rod is located inside the barrel opening, and the barrel opening is located in the middle of a plurality of connecting jacks. The elastic spring is located inside the stretching rod.

[0006] Compared with the related technologies, a seeder for multi-point planting of corn provided by the present invention has the following beneficial effects:

[0007] 1. The present invention provides a seeder for multi-point planting of corn. By starting the driving motor, as the driving motor operates, the stirring blades are driven to stir inside the screening barrel. The corn seeds continuously shake inside the screening barrel under the agitation of the stirring blades. Among them, the damaged and unqualified corn seeds fall into the collection box through the sieve holes on the surface of the collection box under the agitation of the stirring blades. The design of the sieve holes allows the unqualified seeds to pass through quickly, while the qualified seeds remain in the screening barrel, realizing rapid separation. The continuous agitation of the stirring blades can ensure the uniform distribution of corn seeds during the screening process and improve the screening efficiency.

[0008] 2. The present invention provides a seeder for multi-point planting of corn. By pulling the control handle outwards to drive the attaching plate away from the connecting shaft rod and pulling the adjusting plate closer to the screening barrel, the limiting rod arranged on the outer wall of the adjusting plate is inserted into the connecting jack on the outer wall of the screening barrel correspondingly. After releasing the control handle, the attaching plate is reset under the elastic action of the elastic spring and fits with the connecting shaft rod again. Start the cylinder at the top of the mounting seat, and the cylinder lifts the driving motor upwards. As the driving motor is lifted upwards, the screening barrel is driven to lift upwards. Among them, the damaged and unqualified corn seeds are discharged from the discharge port opened on the outer wall of the collection box and fall into the collection groove on the top of the fixed frame. The designs of the collection box and the collection groove can ensure the effective collection of unqualified seeds and avoid the waste and loss of seeds.

[0009] 3. The present invention provides a seeder for multi-point planting of corn. By starting the cylinder to descend to drive the screening barrel to reset, after the screening barrel is reset, start the driving motor to operate. The set screening barrel and the connecting shaft rod are inserted into the connecting jack correspondingly through the set limiting rod. At the same time, the set arc-shaped attaching plate fits with the connecting shaft rod. Under the elastic action of the elastic spring, the friction force between the arc-shaped attaching plate and the connecting shaft rod is increased. As the driving motor rotates, the screening barrel rotates inside the protective housing. As the screening barrel rotates, when the feeding port opened on the outer wall of the screening barrel rotates to the lower part, the feeding port communicates with the discharge port opened on the outer wall of the protective housing. The plump corn seeds fall into the sowing box through the discharge port and fall into the material box through the screening of the filter plate. The filter plate and the inner wall bottom of the material box are both inclined. After the corn seeds fall into the material box, they fall into the feeding device through the sowing port. As the seeder moves forward, the corn seeds are evenly sown through the feeding device.

[0010] 4. The present invention provides a seeder for multi-point planting of corn. By pulling the handle to drive the cover plate to rotate, the corn seeds on the surface of the filter plate are cleaned from the cleaning port, effectively preventing the problem of blockage of corn seed filtration. Description of the Drawings

[0011] Figure 1 Schematic diagram of the overall structure of the present invention;

[0012] Figure 2 Schematic diagram of the structure at the cover plate of the present invention;

[0013] Figure 3 Schematic diagram of the structure at the screening device of the present invention;

[0014] Figure 4 Exploded view of a partial structure at the screening device of the present invention;

[0015] Figure 5 Partial cross-sectional view of the structure at the screening barrel of the present invention;

[0016] Figure 6 Exploded view of the structure at the screening barrel of the present invention;

[0017] Figure 7 Schematic diagram of the structure at the sowing box of the present invention;

[0018] Figure 8 Schematic diagram of the structure at the material box of the present invention;

[0019] Figure 9 For the present invention Figure 6 Enlarged view of the structure at position A in;

[0020] Figure 10 For the present invention Figure 9 Enlarged view of the structure at position B in.

[0021] In the figure: 1. Sowing box; 101. Fixed frame; 102. Rotating shaft; 103. Collection groove; 2. Screening device; 201. Protective housing; 202. Screening barrel; 203. Driving motor; 204. Connecting shaft rod; 205. Stirring blade; 206. Discharge opening; 207. Limiting ring; 208. Collection box; 209. Barrel opening; 210. Connecting jack; 211. Adjusting plate; 212. Limiting rod; 213. Connecting plate; 214. Control handle; 215. Elastic spring; 216. Tensile rod; 217. Adhesive plate; 218. Feeding bin; 219. Cleaning opening; 220. Cover plate; 221. Handle; 222. Sliding groove; 223. Fixed base; 224. Feeding port; 225. Discharge port; 226. Sieve holes; 227. Discharge port; 228. Activity groove; 3. Filter plate; 301. Filter holes; 4. Mounting seat; 5. Cylinder; 501. Slide block; 6. Connecting buckle; 7. Material box; 8. Sowing opening; 9. Feeding device; 10. Support frame; 11. Wheels. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0023] Embodiment 1: Please refer to Figures 1 - 10, the present invention provides a technical solution: a seeder for multi-point planting of corn, including a seeding box 1 and a screening device 2. The screening device 2 includes a protective housing 201, a screening barrel 202, and a driving motor 203. The output end of the driving motor 203 is fixedly provided with a connecting shaft rod 204, and the outer wall of the connecting shaft rod 204 is fixedly provided with a plurality of stirring blades 205. A feeding port 206 is opened on the outer wall of the screening barrel 202, and a collecting box 208 is fixedly provided on the outer wall of the screening barrel 202. A plurality of sieve holes 226 are opened on the outer wall of the collecting box 208. The seeding box 1 includes a material box 7 and a fixed frame 101. The outer wall of the top of the material box 7 is fixedly provided with a rotating shaft 102, and the outer wall of the rotating shaft 102 is rotatably connected to one side outer wall of the fixed frame 101. A collecting groove 103 is opened on the outer wall of the top of the fixed frame 101. An installation seat 4 is fixedly provided on one side outer wall of the seeding box 1, and a cylinder 5 is fixedly provided on the outer wall of the top of the installation seat 4. The bottom outer wall of the driving motor 203 is fixedly provided with a fixed base 223, and a movable groove 228 is opened on the bottom outer wall of the fixed base 223. The output end of the cylinder 5 is rotatably provided with a slider 501, and the slider 501 is slidably connected to the movable groove 228. A discharge port 227 is opened on the outer wall of the collecting box 208 away from the driving motor 203, and the discharge port 227 is located at the collecting groove 103. A filter plate 3 is fixedly provided on the inner wall of the material box 7, and a plurality of filter holes 301 are opened on the outer wall of the filter plate 3. The filter plate 3 is inclined. A sowing port 8 is opened on the bottom of the inner wall of the material box 7, and a feeding device 9 is fixedly provided on the outer wall of the material box 7. The feeding device 9 is located at the sowing port 8. A cleaning port 219 and a discharge port 225 are opened on the outer wall of the protective housing 201, and a feeding bin 218 is fixedly provided on the outer wall of the protective housing 201. A feeding port 224 is opened on the outer wall of the top of the feeding bin 218. Two limiting rings 207 are fixedly provided on the outer wall of the screening barrel 202, and two sliding grooves 222 are opened on the inner wall of the protective housing 201. The two sliding grooves 222 correspond to the two limiting rings 207 one by one. The protective housing 201 and the screening barrel 202 are rotatably connected through the provided sliding grooves 222 and limiting rings 207. A connecting buckle 6 is fixedly provided on the outer wall of the installation seat 4 away from the material box 7, and the connecting buckle 6 is used for vehicle docking. A support frame 10 is fixedly provided on the bottom outer wall of the material box 7, and four wheels 11 are provided on the bottom outer wall of the support frame 10. A cover plate 220 is rotatably provided on the outer wall of the protective housing 201, and a handle 221 is fixedly provided on the outer wall of the cover plate 220. The cover plate 220 is arranged outside the cleaning port 219. A plurality of stirring blades 205 are all located inside the screening barrel 202. The connecting shaft rod 204 is located inside the barrel opening 209, and the barrel opening 209 is located in the middle of a plurality of connecting jacks 210. An adjusting plate 211 is fixedly provided on the outer wall of the connecting shaft rod 204, and a plurality of limiting rods 212 are fixedly provided on the outer wall of the adjusting plate 211. A plurality of connecting jacks 210 and a barrel opening 209 are opened on the outer wall of the screening barrel 202 close to the driving motor 203, and the limiting rods 212 correspond to the connecting jacks 210 one by one.A connecting plate 213 is fixedly arranged on the outer wall of the adjusting plate 211. A stretching rod 216 is slidably inserted into the inner wall of the connecting plate 213. A attaching plate 217 is fixedly arranged on the outer wall of one end of the stretching rod 216 close to the connecting shaft rod 204. A control handle 214 is fixedly arranged on the outer wall of the end of the stretching rod 216 away from the attaching plate 217. An elastic spring 215 is fixedly arranged between the control handle 214 and the connecting plate 213, and the elastic spring 215 is located inside the stretching rod 216.

[0024] In this embodiment, the corn seeds to be planted are poured into the inner part of the feeding bin 218 through the feeding port 224. The corn seeds enter the inner part of the screening barrel 202 through the feeding bin 218. The driving motor 203 is started. As the driving motor 203 operates, it drives the stirring blades 205 to stir inside the screening barrel 202. The corn seeds continuously shake inside the screening barrel 202 under the agitation of the stirring blades 205. Among them, the damaged and unqualified corn seeds fall into the inner part of the collection box 208 through the sieve holes 226 on the surface of the collection box 208 under the agitation of the stirring blades 205. The design of the sieve holes 226 allows the unqualified seeds to pass through quickly, while the qualified seeds remain in the screening barrel 202, achieving rapid separation. The continuous agitation of the stirring blades 205 can ensure the uniform distribution of the corn seeds during the screening process and improve the screening efficiency. Pull the control handle 214 outwards to drive the attaching plate 217 away from the connecting shaft rod 204, and pull the adjusting plate 211 closer to the screening barrel 202. The limiting rod 212 provided on the outer wall of the adjusting plate 211 is correspondingly inserted into the connecting jack 210 on the outer wall of the screening barrel 202. Release the control handle 214, and the attaching plate 217 resets under the elastic action of the elastic spring 215 and fits with the connecting shaft rod 204 again. Start the cylinder 5 at the top of the mounting seat 4. The cylinder 5 lifts the driving motor 203 upwards. As the driving motor 203 is lifted upwards, it drives the screening barrel 202 to be lifted upwards. Among them, the damaged and unqualified corn seeds are discharged from the discharge port 227 opened on the outer wall of the collection box 208 and fall into the inner part of the collection groove 103 at the top of the fixed frame 101. The designs of the collection box 208 and the collection groove 103 can ensure the effective collection of the unqualified seeds and avoid the waste and loss of the seeds. After all the damaged and unqualified corn seeds flow out, start the cylinder 5 to descend to drive the screening barrel 202 to reset. After the screening barrel 202 is reset, start the driving motor 203 to operate. The provided screening barrel 202 and the connecting shaft rod 204 are correspondingly inserted through the provided limiting rod 212 and the connecting jack 210. At the same time, the provided arc-shaped attaching plate 217 fits with the connecting shaft rod 204. Under the elastic action of the elastic spring 215, the friction force between the arc-shaped attaching plate 217 and the connecting shaft rod 204 is increased. As the driving motor 203 rotates, it drives the screening barrel 202 to rotate inside the protective housing 201. As the screening barrel 202 rotates, when the discharge port 206 opened on the outer wall of the screening barrel 202 rotates to the lower part, the discharge port 206 communicates with the discharge port 225 opened on the outer wall of the protective housing 201. The plump corn seeds fall into the seeding box 1 through the discharge port 225 and fall into the inner part of the material box 7 after being screened by the filter plate 3. The filter plate 3 and the inner wall bottom of the material box 7 are both inclined. After the corn seeds fall into the inner part of the material box 7, they fall into the discharging device 9 through the spreading port 8. As the seeding machine moves forward, the corn seeds are evenly spread through the discharging device 9. The provided discharging device 9 has multiple seeding outlets, enabling the device to perform multi-point planting. When reloading is required, first start the driving motor 203 to turn the discharge port 206 of the screening barrel 202 to communicate and correspond with the feeding port 224.Then, pull the control handle 214 outwards to drive the attaching plate 217 away from the connecting shaft rod 204, and pull the adjusting plate 211 away from the screening barrel 202, then the feeding can be restarted. By repeating the operation, the damaged and substandard corn seeds can be screened. There are two sliding grooves 222 provided on the inner wall of the protective housing 201, and two limiting rings 207 are provided on the outer wall of the screening barrel 202. The screening barrel 202 is arranged to rotate inside the protective housing 201 through the provided limiting rings 207. When the corn seeds on the outer wall of the filter plate 3 cannot fall, the handle 221 can be pulled to drive the cover plate 220 to rotate, and the corn seeds on the surface of the filter plate 3 can be cleaned from the cleaning port 219, effectively preventing the problem of corn seed filtration blockage.

[0025] Working principle: When the device is in use, first pour the corn seeds to be planted into the inner part of the feeding bin 218 through the feeding port 224. The corn seeds enter the inner part of the screening barrel 202 through the feeding bin 218. Start the driving motor 203. As the driving motor 203 runs, it drives the stirring blades 205 to stir inside the screening barrel 202. The corn seeds continuously shake inside the screening barrel 202 under the turning of the stirring blades 205. Among them, the damaged and substandard corn seeds fall into the inner part of the collection box 208 through the sieve holes 226 on the surface of the collection box 208 under the turning of the stirring blades 205. Pull the control handle 214 outwards to drive the attaching plate 217 away from the connecting shaft rod 204, and pull the adjusting plate 211 closer to the screening barrel 202. The limiting rod 212 arranged on the outer wall of the adjusting plate 211 is correspondingly inserted into the connecting jack 210 on the outer wall of the screening barrel 202. Release the control handle 214, and the attaching plate 217 resets under the elastic action of the elastic spring 215 and fits with the connecting shaft rod 204 again. Start the cylinder 5 at the top of the mounting seat 4. The cylinder 5 lifts the driving motor 203 upwards. As the driving motor 203 is lifted upwards, it drives the screening barrel 202 to be lifted upwards. Among them, the damaged and substandard corn seeds are discharged from the discharge port 227 opened on the outer wall of the collection box 208 and fall into the collection groove 103 at the top of the fixed frame 101. After all the damaged and substandard corn seeds flow out, start the cylinder 5 to descend to drive the screening barrel 202 to reset. After the screening barrel 202 is reset, start the driving motor 203 to run. The set screening barrel 202 and the connecting shaft rod 204 are correspondingly inserted through the set limiting rod 212 and the connecting jack 210. At the same time, the set arc-shaped attaching plate 217 fits with the connecting shaft rod 204. Under the elastic action of the elastic spring 215, the friction force between the arc-shaped attaching plate 217 and the connecting shaft rod 204 is increased. As the driving motor 203 rotates, it drives the screening barrel 202 to rotate inside the protective housing 201. As the screening barrel 202 rotates, when the discharge port 206 opened on the outer wall of the screening barrel 202 rotates to the lower part, the discharge port 206 communicates with the discharge port 225 opened on the outer wall of the protective housing 201. The plump corn seeds fall into the sowing box 1 through the discharge port 225, and fall into the material box 7 through the screening of the filter plate 3. The set filter plate 3 and the inner wall bottom of the material box 7 are both inclined. After the corn seeds fall into the inner part of the material box 7, they fall into the discharging device 9 through the spreading port 8. As the sowing machine moves forward, the corn seeds are evenly spread through the discharging device 9. When reloading is needed, first start the driving motor 203 to turn the discharge port 206 of the screening barrel 202 to be communicated and corresponding to the feeding port 224, and then pull the control handle 214 outwards to drive the attaching plate 217 away from the connecting shaft rod 204, and pull the adjusting plate 211 away from the screening barrel 202, then reloading can be carried out, and the damaged and substandard corn seeds can be screened by repeating the operation.

[0026] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seeder for multi-point planting of corn, comprising a seeding box (1) and a screening device (2), characterized in that: The screening device (2) includes a protective housing (201), a screening barrel (202), and a driving motor (203). A connecting shaft rod (204) is fixedly arranged at the output end of the driving motor (203). A plurality of stirring blades (205) are fixedly arranged on the outer wall of the connecting shaft rod (204). A feeding port (206) is formed on the outer wall of the screening barrel (202). A collection box (208) is fixedly arranged on the outer wall of the screening barrel (202). A plurality of screening holes (226) are formed on the outer wall of the collection box (208). The seeding box (1) includes a material box (7) and a fixed frame (101). A rotating shaft (102) is fixedly arranged on the top outer wall of the material box (7). The outer wall of the rotating shaft (102) is rotatably connected to one side outer wall of the fixed frame (101). A collection groove (103) is formed on the top outer wall of the fixed frame (101). A mounting seat (4) is fixedly arranged on one side outer wall of the seeding box (1). A cylinder (5) is fixedly arranged on the top outer wall of the mounting seat (4). A fixed base (223) is fixedly arranged on the bottom outer wall of the driving motor (203). An activity groove (228) is formed on the bottom outer wall of the fixed base (223). A slider (501) is rotatably arranged at the output end of the cylinder (5). The slider (501) is slidably connected to the activity groove (228). A discharge port (227) is formed on the outer wall of the collection box (208) away from the driving motor (203). The discharge port (227) is located at the collection groove (103). An adjusting plate (211) is fixedly arranged on the outer wall of the connecting shaft rod (204). A plurality of limiting rods (212) are fixedly arranged on the outer wall of the adjusting plate (211). A plurality of connecting jacks (210) and a barrel opening (209) are formed on the outer wall of the screening barrel (202) close to the driving motor (203). The limiting rods (212) correspond to the connecting jacks (210) one by one. A connecting plate (213) is fixedly arranged on the outer wall of the adjusting plate (211). A stretching rod (216) is slidably inserted into the inner wall of the connecting plate (213). A sticking plate (217) is fixedly arranged on the outer wall of the stretching rod (216) close to the connecting shaft rod (204). A control handle (214) is fixedly arranged on the outer wall of the stretching rod (216) away from the sticking plate (217). An elastic spring (215) is fixedly arranged between the control handle (214) and the connecting plate (213). A filter plate (3) is fixedly arranged on the inner wall of the material box (7). A plurality of filter holes (301) are formed on the outer wall of the filter plate (3). The filter plate (3) is inclined. A sowing port (8) is formed at the bottom of the inner wall of the material box (7). A feeding device (9) is fixedly arranged on the outer wall of the material box (7). The feeding device (9) is located at the sowing port (8). A cleaning port (219) and a discharge port (225) are formed on the outer wall of the protective housing (201). A feeding bin (218) is fixedly arranged on the outer wall of the protective housing (201).The top outer wall of the feeding bin (218) is provided with a feeding port (224). Two limiting rings (207) are fixedly arranged on the outer wall of the screening barrel (202). Two sliding grooves (222) are opened on the inner wall of the protective shell (201). The two sliding grooves (222) correspond to the two limiting rings (207) one by one. The protective shell (201) and the screening barrel (202) are rotationally connected through the arranged sliding grooves (222) and limiting rings (207). A connecting buckle (6) is fixedly arranged on the outer wall of the mounting seat (4) away from the material box (7). The connecting buckle (6) is used for vehicle docking. A support frame (10) is fixedly arranged on the bottom outer wall of the material box (7). Four wheels (11) are arranged on the bottom outer wall of the support frame (10). A cover plate (220) is rotatably arranged on the outer wall of the protective shell (201). A handle (221) is fixedly arranged on the outer wall of the cover plate (220). The cover plate (220) is arranged outside the cleaning port (219). A plurality of stirring blades (205) are all located inside the screening barrel (202). The connecting shaft rod (204) is located inside the barrel opening (209). The barrel opening (209) is located in the middle of a plurality of connecting jacks (210). The elastic spring (215) is located inside the tension rod (216).

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