Small seeder based on air suction technology

Abstract

The utility model relates to a small-sized seeder based on air suction technology, which comprises a rack, and further comprises an air pump, a seed feeding mechanism and a ditching unit which are arranged on the rack, and the seed feeding mechanism comprises an air suction shaft controlled by a driving motor, a seed metering device, a hopper and a seed receiving hopper; the air suction shaft is communicated with the air pump, the air suction shaft is communicated with a plurality of seed-metering devices, each seed-metering device is provided with a plurality of air suction hole groups with different diameters, and each air suction hole group comprises a plurality of air suction holes which are uniformly distributed along the circumferential surface of the seed-metering device; the lower part of the seed-metering device is arranged in a hopper, a seed receiving hopper is arranged on one side of the hopper, and seeds in the hopper are transferred into the seed receiving hopper through the seed-metering device; the furrowing unit comprises a plurality of furrow openers which can be movably arranged on the rack up, down, left and right, each furrow opener comprises a furrow opener body and a seeding hard pipe, and a seeding hose is communicated between the seeding hard pipe and the seed receiving hopper. According to the utility model, a series of operations such as ditching, seed metering, soil covering and pressing can be effectively carried out, so that the accurate sowing of specified vegetable seeds is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of seeding, in particular to a small seeder based on air suction technology. Background Technique

[0002] Seeding, as the starting link of agricultural production, its efficiency and accuracy have a decisive impact on the entire crop growth cycle and final yield. The traditional manual seeding method has been unable to meet the needs of modern agricultural production due to problems such as low efficiency, high labor intensity, and uneven seeding. In order to improve seeding efficiency and accuracy, various automated seeding technologies and devices have been developed and applied successively, among which the air suction seeding technology has received extensive attention due to its unique advantages.

[0003] The air suction seeding technology uses the negative pressure principle generated by air flow to adsorb seeds, and then accurately releases the seeds to the predetermined position through precise control. This technology not only improves the seeding accuracy and uniformity, but also significantly reduces the waste of seeds, and has good adaptability to seeds of different shapes and sizes. Therefore, the air suction seeding technology shows great potential in improving seeding efficiency, reducing seed costs, and meeting the needs of precision agriculture.

[0004] Some air suction seeding equipment belongs to towed equipment and cannot complete seeding independently. It needs to be suspended and installed on traction equipment such as tractors. After being installed with the traction equipment, its volume is large and the equipment flexibility is poor. Moreover, the air suction seed metering mechanism is designed relatively complex, and its application is inconvenient, and it is difficult to simultaneously perform seed metering operations for different types of seeds.

[0005] Some air suction seeding equipment does not have the functions of row spacing and depth adjustment, and cannot adjust the seeding row spacing and depth according to the type of seeds. Even if some equipment can be adjusted, the adjustment means used is not good. For example, a kind of air suction wheat seeder disclosed in the patent publication number CN219329983U adjusts the height of the furrow opener up and down through an adjustment mechanism of an electric screw rod structure. The application of the screw rod requires a certain amount of lubrication to make it smooth, but in seeding, the soil will inevitably contact the screw rod, and thus the operation of the adjustment mechanism may be blocked. Summary of the Invention

[0006] The utility model aims to solve the problems that some air suction seeding equipment is difficult to simultaneously perform seed metering operations for different types of seeds, and the seeding row spacing and depth cannot be adjusted. It provides a small seeder based on air suction technology, which can independently realize walking seeding operations without relying on traction equipment, can perform air suction seeding on different types of seeds, has a wide application range, and can conveniently adjust the seeding row spacing and depth to achieve precise seed metering and seeding.

[0007] To achieve the above object, the technical solution adopted by the utility model is:

[0008] A small seeder based on air-suction technology, including a movable frame for facilitating the movement of the frame on the land, and further including an air pump, a seed-feeding mechanism, and a furrowing unit provided on the frame. The seed-feeding mechanism includes an air-suction shaft controlled by a driving motor, a seed metering device, a hopper, and a seed-transfer hopper.

[0009] The air-suction shaft is hollow inside, rotatably arranged on the frame, and connected to the air pump to facilitate creating a negative pressure environment inside the air-suction shaft. A plurality of the seed metering devices are connected to the air-suction shaft, thereby realizing a negative pressure environment inside the seed metering devices. Each seed metering device is provided with multiple groups of air-suction hole groups with different diameters. Each group of air-suction hole groups includes a plurality of air-suction holes evenly arranged along the circumferential surface of the seed metering device, facilitating the continuous adsorption of seeds.

[0010] A plurality of the hoppers are arranged on the frame in a vertically movable manner, facilitating the storage of a certain amount of seeds. The hoppers and the seed metering devices are in one-to-one correspondence vertically. The seed metering devices are placed below the hoppers. A seed-transfer hopper is arranged on one side of the hopper. The seeds in the hopper are transferred to the seed-transfer hopper through the seed metering devices.

[0011] The furrowing unit is arranged below the hopper. The furrowing unit includes a plurality of furrow openers that can be moved up, down, left, and right on the frame, facilitating the adjustment of the sowing depth and spacing. The furrow openers and the hoppers are in one-to-one correspondence vertically. Each furrow opener includes a furrow opener body and a sowing hard pipe. The sowing hard pipe vertically penetrates the furrow opener body. A sowing flexible pipe is connected between the sowing hard pipe and the seed-transfer hopper upward. Sowing is carried out immediately after furrowing.

[0012] Further, a driving wheel mechanism and a driven wheel unit are respectively arranged on the front and rear sides of the frame. The driving wheel mechanism and the driven wheel unit cooperate to support the frame, facilitating the realization of the walking function of the frame.

[0013] Further, the driving wheel mechanism includes a driving shaft, a driving motor, and a harrowing wheel. The driving shaft is rotatably arranged in front of the frame. The middle part of the driving shaft is chain-driven with the driving motor to facilitate driving the driving shaft to rotate. The harrowing wheels are arranged on both sides of the driving shaft.

[0014] The harrowing wheel includes two support disks arranged at intervals and a plurality of connecting rods for connecting the two support disks. The support disks are circular, and the connecting rods are evenly arranged on the circumferential side of the support disks.

[0015] Further, the driven wheel unit includes a driven shaft and driven wheels. The driven shaft is rotatably arranged behind the frame. A plurality of the driven wheels are arranged at intervals on the driven shaft. The driven wheels and the furrow openers are in one-to-one correspondence.

[0016] Further, a battery pack, a control handle, and a control console for supplying power to electrical components are also provided on the frame. The control handle is arranged at the rear of the frame to facilitate controlling the traveling direction of the frame, and the control console is arranged on the control handle to facilitate controlling the electrical components.

[0017] Further, a drive shaft is rotatably arranged on the frame. The drive shaft and the air suction shaft are arranged side by side in the front and rear. The drive motor is in gear transmission with the drive shaft, and the drive shaft is in belt transmission with the air suction shaft. One end of the air suction shaft is closed, and a rotary joint is arranged at the other end. The air pump is communicated with an air pipe, and one end of the air pipe is connected to the rotary joint to prevent the air pipe from affecting the rotation of the air suction shaft.

[0018] Further, the seed metering device is a hollow cylindrical structure. The seed metering device and the air suction shaft are coaxially arranged. Multiple groups of air suction hole groups are arranged at intervals along the axial direction of the seed metering device. A tape for closing the air suction hole groups is also pasted on the circumferential surface of the seed metering device, which is convenient for specifically selecting a group of air suction hole groups for use according to the type of seeds.

[0019] Two lifting sleeves are arranged on the frame. An adjusting bolt one is arranged on each lifting sleeve. A lifting rod is movably arranged up and down between the two lifting sleeves. The hopper is arranged on the lifting rod. The two ends of the lifting rod are vertically bent downward and are inserted into the lifting sleeves. The adjusting bolt one abuts against the end of the lifting rod to facilitate locking and fixing the lifting rod.

[0020] Further, the hopper is a groove structure, which is convenient for containing seeds. There is a gap between one side wall of the hopper and the circumferential side surface of the seed metering device. A wedge-shaped seed scraping plate is arranged on the other side wall of the hopper to facilitate scraping the seeds adsorbed on the air suction holes into the inoculation hopper. The seed scraping plate and the inoculation hopper are in upper and lower communication, and the inoculation hopper is funnel-shaped.

[0021] Further, a cross bar is arranged on the frame. A plurality of mounting sleeves are movably arranged left and right on the cross bar. Each mounting sleeve is provided with a furrow opener, and the furrow opener moves left and right accordingly.

[0022] Each mounting sleeve includes a horizontal sleeve and a vertical sleeve fixedly connected vertically. The horizontal sleeve is sleeved on the cross bar. An adjusting bolt two is arranged on the horizontal sleeve. The adjusting bolt two abuts against the cross bar to facilitate locking and fixing the mounting sleeve on the cross bar.

[0023] The seeding hard pipe is inserted into the vertical sleeve. An adjusting bolt three is arranged in the vertical sleeve. The adjusting bolt three abuts against the seeding hard pipe to facilitate locking the furrow opener and the mounting sleeve together.

[0024] By the above technical solutions, the beneficial effects of the present utility model are:

[0025] The structure of the utility model is reasonably designed. The driving wheel mechanism and the driven wheel unit bear the frame to realize the walking function of the frame, facilitating the movement of the whole seeder. At the same time, the special structural design of the harrowing wheel can not only ensure the equipment to move forward smoothly on rough ground, enhance the adaptability and stability of the seeder in complex terrains, but also effectively loosen the ground soil, facilitating subsequent sowing and increasing the operation adaptation range.

[0026] The air pump, the air suction shaft and the seed metering device of the utility model are connected, which can create a negative pressure environment inside the seed metering device, and then the seeds in the hopper can be adsorbed by using the air suction holes. There are multiple groups of air suction hole groups with different diameters on the seed metering device, which can be adapted to different sizes and types of seeds. One group of air suction hole groups can be selected and opened according to the seed type, and the remaining air suction hole groups can be sealed with adhesive tape, so as to improve the application range of the equipment.

[0027] The furrow opener of the utility model adopts a core share type furrow opener, which has functions such as furrow opening, seed guiding, soil covering and sowing depth adjustment. A sowing hard pipe penetrates through the furrow opener, and sowing can be carried out immediately after furrow opening. The distance between the furrow openers is adjustable, and the up and down positions are adjustable, which is convenient for adjusting the sowing depth and plant spacing. This integrated design greatly improves the operation efficiency of the seeder, enables it to quickly adapt to different soil conditions, and effectively improves the operation flexibility and efficiency. Brief Description of the Drawings

[0028] Figure 1 is an axonometric view of the small seeder based on air suction technology of the utility model.

[0029] Figure 2 is a side view of the small seeder based on air suction technology of the utility model.

[0030] Figure 3 is a top view of the small seeder based on air suction technology of the utility model, in which the driving wheel mechanism is not shown.

[0031] Figure 4 is an axonometric view of the seed dropping mechanism of the small seeder based on air suction technology of the utility model.

[0032] Figure 5 is an axonometric view of the seed metering device of the small seeder based on air suction technology of the utility model.

[0033] Figure 6 is a schematic diagram of the air suction hole type of the small seeder based on air suction technology of the utility model.

[0034] Figure 7 is a schematic diagram of the operating state of the seed metering device of the small seeder based on air suction technology of the utility model, and the arrow indicates the seed flow direction.

[0035] The reference numerals in the drawings are: 1 frame, 2 driving wheel mechanism, 201 driving shaft, 202 driving motor, 203 harrowing wheel, 3 support disk, 4 connecting rod, 5 driven wheel unit, 501 driven shaft, 502 driven wheel, 6 battery pack, 7 control handle, 8 control console, 9 air pump, 10 drive motor, 11 air suction shaft, 12 seed metering device, 121 drum, 122 end cover, 13 hopper, 14 inoculation hopper, 15 drive shaft, 16 synchronous belt, 17 air pipe, 18 rotary joint, 19 air suction hole, 20 seed scraping plate, 21 lifting sleeve, 22 adjusting bolt 1, 23 lifting rod, 24 furrow opener, 241 furrow opener body, 242 seeding hard pipe, 25 seeding flexible pipe, 26 cross bar, 27 mounting sleeve, 271 horizontal sleeve, 272 vertical sleeve, 28 adjusting bolt 2, 29 adjusting bolt 3. Detailed implementation manners

[0036] The following makes a detailed description of the specific implementation manners of the present utility model in conjunction with the drawings:

[0037] As Figures 1 to 7 shown, the small seeding machine based on air suction technology includes a movable frame 1. The frame 1 is the moving foundation of the whole seeding machine. In order to realize the walking movement of the frame 1, a driving wheel mechanism 2 and a driven wheel unit 5 are respectively arranged on the front and rear sides of the frame 1. The driving wheel mechanism 2 and the driven wheel unit 5 cooperate to support the frame 1, thereby driving the frame 1 to travel on the land.

[0038] The driving wheel mechanism 2 includes a driving shaft 201, a driving motor 202 and a harrowing wheel 203. The driving shaft 201 is rotatably arranged in front of the frame 1. The middle of the driving shaft 201 is chain-driven with the driving motor 202, and the driving motor 202 drives the driving shaft 201 to rotate. Harrowing wheels 203 are arranged on both sides of the driving shaft 201, and the harrowing wheels 203 rotate together with the driving shaft 201.

[0039] The harrowing wheel 203 is in the shape of a hollow net cylinder. The harrowing wheel 203 includes two support disks 3 arranged at intervals and a plurality of connecting rods 4 for connecting the two support disks 3. The support disk 3 is circular, and the connecting rods 4 are evenly arranged on the circumferential side of the support disk 3. The structural design of the harrowing wheel 203 not only realizes the effective sorting and compaction of the soil, improves the contact effect between the seeds and the soil, but also increases the grounding area of the equipment, enhances the stability and traction force on uneven terrains, and ensures efficient and stable operation under various farmland conditions.

[0040] The driven wheel unit 5 includes a driven shaft 501 and a driven wheel 502. The driven shaft 501 is rotatably arranged behind the frame 1. A plurality of driven wheels 502 are arranged at intervals on the driven shaft 501. The driven wheels 502 are in the shape of tires, and the driven wheels 502 rotate together with the driven shaft 501. The driving wheel mechanism 2 and the driven wheel unit 5 cooperate to ensure good passability and high walking stability of the frame 1.

[0041] In order to realize the control of the movement of the rack 1, a battery pack 6 for powering electrical components, a control handle 7 and a control console 8 are also provided on the rack 1. The battery pack 6 powers the active motor 202. The control handle 7 is provided at the rear of the rack 1 to control the movement direction of the entire rack 1. The control console 8 is provided on the control handle 7 to control the rotation speed of the active motor 202, thereby adjusting the travel speed of the entire rack 1.

[0042] In this embodiment, the small seed drill further includes an air pump 9, a seeding mechanism and a furrowing unit arranged on the frame 1. The seeding mechanism includes an air suction shaft 11 controlled by a drive motor 10, a seed metering device 12, a hopper 13 and an inoculation hopper 14. The air suction shaft 11 is rotatably arranged on the frame 1 and driven to rotate by the drive motor 10. The drive motor 10 is powered by a battery pack 6, and the operation of the drive motor 10 is controlled by the start and stop and speed control of the control console 8.

[0043] In order to realize the rotation of the air suction shaft 11, a driving shaft 15 is rotatably arranged on the frame 1, and the driving shaft 15 and the air suction shaft 11 are arranged in parallel front and back. The driving motor 10 and the driving shaft 15 are gear-driven, which can drive the driving shaft 15 to rotate, and the driving shaft 15 and the air suction shaft 11 are belt-driven. Specifically, the driving shaft 15 and the air suction shaft 11 are connected by four synchronous belts 16, which can drive the air suction shaft 11 to rotate.

[0044] The air suction shaft 11 is a hollow cylindrical shaft, one end of which is closed. The air suction shaft 11 is connected to the air pump 9, that is, a rotary joint 18 is provided at the other end of the air suction shaft 11, and the air pump 9 is connected to the air pipe 17, and one end of the air pipe 17 is connected to the rotary joint 18. Then, the air suction shaft 11, the air pipe 17 and the air pump 9 are connected in sequence. The air pump 9 adopts a piston air suction pump, and the air suction and discharge are realized by the reciprocating movement of the piston in the cylinder. The air pump 9 is powered by the battery pack 6, and the air pump 9 pumps air into the air suction shaft 11 to realize the negative pressure environment inside the air suction shaft 11. The rotary joint 18 is used to prevent the air pipe 17 from interfering with the operation of the air suction shaft 11.

[0045] The air suction shaft 11 is connected to four seeding devices 12, and the interior of the seeding device 12 is also a negative pressure environment. The seeding device 12 is driven to rotate by the synchronous belt 16, and cooperates with the high-efficiency air pump 9 to achieve stable adsorption and accurate discharge of seeds. The seeding device 12 is a hollow cylindrical structure. The seeding device 12 and the air suction shaft 11 are coaxially arranged, and the air suction shaft 11 can drive the seeding device 12 to rotate together. The seeding device 12 includes a cylindrical drum 121 with a "凵"-shaped cross section and an end cover 122 for closing the opening of the drum 121. The end cover 122 and the drum 121 can be fastened by threaded connection.

[0046] Each seeder 12 is provided with multiple groups of air suction hole groups with different diameters. The diameters between the air suction hole groups are different, and the multiple groups of air suction hole groups are arranged at intervals along the axial direction of the seeder 12. Each group of air suction hole groups includes a plurality of air suction holes 19 evenly arranged along the circumferential surface of the seeder 12, and the plurality of air suction holes 19 are evenly distributed along the circumferential direction of the seeder 12. The air suction hole 19 can be one of a flat hole, a convex hole or a concave hole. Preferably, the air suction hole 19 is a convex hole.

[0047] Air suction hole groups with different diameters can adsorb seeds of different sizes and types, so that multiple types of crop seeds can be sown. After selecting a group of air suction hole groups for use, the remaining air suction hole groups can be closed. Here, a tape for closing the air suction hole groups is also pasted on the circumferential surface of the seeder 12, and the remaining air suction hole groups are closed by winding the tape around once.

[0048] Four hoppers 13 are arranged on the frame 1. The hoppers 13 and the seeders 12 are in one-to-one correspondence up and down, and can supply materials to the seeders 12 one by one. The hopper 13 is of a groove structure, with an opening at the upper part of the hopper 13. A certain amount of seeds can be contained in the hopper 13. The lower part of the seeder 12 is placed in the hopper 13, and the seeder 12 can suck out the seeds in the hopper 13 through negative pressure. When the seeder 12 cooperates with the hopper 13, there is a gap between one side wall of the hopper 13 and the circumferential side surface of the seeder 12, which is convenient for the seeder 12 to adsorb seeds and move them out of the hopper 13. A wedge-shaped seed scraping plate 20 is arranged on the other side wall of the hopper 13, and the seed scraping plate 20 can scrape out the seeds adsorbed on the seeder 12.

[0049] The hopper 13 is arranged on the frame 1 in a lifting manner. The up and down lifting of the hopper 13 is for the convenience of feeding. When the hopper 13 moves downward, it is far away from the seeder 12, and the opening at the upper part of the hopper 13 is open, which is convenient for putting seeds into it. When the hopper 13 moves upward, it is close to the seeder 12 and needs to move upward to the working range of the seeder 12. At this time, the seeds in the hopper 13 can be adsorbed by the seeder 12. A vibration motor is arranged on the outer side wall of the hopper 13, which can reduce the internal friction coefficient between the seeds in the hopper 13 and improve the fluidity of the seeds, and promote the adsorption efficiency of the seeder 12 for the seeds.

[0050] To realize the lifting of the hopper 13, two lifting sleeves 21 are arranged on both sides of the frame 1 in the width direction. The lifting sleeves 21 are square tubular. An adjusting bolt 1 22 is arranged on each lifting sleeve 21. A lifting rod 23 is arranged between the two lifting sleeves 21 in a vertically movable manner. Four hoppers 13 are arranged on the lifting rod 23. The two ends of the lifting rod 23 are bent vertically downward and inserted into the lifting sleeves 21. At this time, the cross section of the lifting rod 23 is in the shape of "[", and the adjusting bolt 1 22 abuts against the end of the lifting rod 23, and can lock and fix the lifting rod 23. When the adjusting bolt 1 22 is loosened, the lifting rod 23 can move up and down, driving the four hoppers 13 to lift together.

[0051] An inoculation hopper 14 is provided on one side of the hopper 13. The inoculation hopper 14 is funnel-shaped and conical in design, which is wide at the top and narrow at the bottom to reduce the possibility of seed retention and blockage. The scraper plate 20 and the inoculation hopper 14 are connected up and down, and then the seeds in the hopper 13 are transferred to the inoculation hopper 14 through the seed metering device 12, that is, the seeds scraped out by the scraper plate 20 flow into the inoculation hopper 14. The inoculation hopper 14 is responsible for receiving the seeds separated from the seed metering device 12 and guiding them to enter the furrowing unit smoothly.

[0052] In this embodiment, the furrowing unit is arranged below the hopper 13, and the furrowing unit includes four furrow openers 24 that can be movably arranged on the frame 1 up and down, left and right, and the furrow openers 24 correspond to the hopper 13 one by one, and the driven wheel 502 corresponds to the furrow opener 24 one by one. The furrow opener 24 includes a furrow opener body 241 and a sowing hard pipe 242 that are fixedly connected. The furrow opener body 241 is a core plow type furrow opener 24 structure, and the sowing hard pipe 242 vertically penetrates the furrow opener body 241. The sowing hard pipe 242 is connected to the inoculation bucket 14 with a sowing hose 25, and then the seeds in the inoculation bucket 14 fall to the ground after passing through the sowing hose 25 and the sowing hard pipe 242.

[0053] When the furrow opener 24 is installed, a cross bar 26 is provided on the frame 1, and four mounting sleeves 27 are movably provided on the cross bar 26. The furrow opener 24 is movably arranged up and down in each mounting sleeve 27, so that the spacing between the furrow openers 24 can be adjusted, and the plant spacing can be adjusted. The depth of the furrow opener 24 can be adjusted, and the sowing depth can be adjusted.

[0054] Specifically, each mounting sleeve 27 includes a transverse sleeve 271 and a vertical sleeve 272 which are vertically fixedly connected, and both the transverse sleeve 271 and the vertical sleeve 272 are square tube-shaped. The transverse sleeve 271 is sleeved on the cross bar 26, and an adjusting bolt 28 is provided on the transverse sleeve 271, and the adjusting bolt 28 is tightly against the cross bar 26 to achieve the locking of the transverse sleeve 271. After loosening the adjusting bolt 28, the transverse sleeve 271 can move left and right on the cross bar 26. When the transverse sleeve 271 moves, the vertical sleeve 272 moves along with it. A sowing hard tube 242 is penetrated in the vertical sleeve 272, and an adjusting bolt 3 29 is provided in the vertical sleeve 272. The adjusting bolt 3 29 is tightly against the sowing hard tube 242 to achieve the fixing of the sowing hard tube 242. After loosening the adjusting bolt 3 29, the entire furrow opener 24 can be adjusted up and down.

[0055] The principle of the present utility model is as follows: A certain amount of seeds are placed in each hopper 13, and then the hopper 13 is moved upward so that it is within the working range of the seed metering device 12; according to the type of seeds, the height of the furrow opener 24 and the distance between the furrow openers 24 are adjusted, thereby adjusting the seeding depth and seeding spacing; one group of air suction holes is selected to adsorb seeds, and the remaining air suction holes are sealed with tape; then the rotational speeds of the main motor 202 and the drive motor 10 are set, thereby controlling the traveling speed of the entire seeder and the rotational speed of the seed metering device 12.

[0056] The main driving wheel mechanism 2 drives the frame 1 to move forward actively, and an operator holds the control handle 7 at the rear to control the traveling direction manually. During the traveling of the seeder, the furrow opener 24 opens furrows; the air pump 9 is started to finally create a negative pressure environment in the seed metering device 12, and the seeds in the hopper 13 are continuously adsorbed through the air suction holes 19. The seeds move out of the hopper 13 under the rotation of the seed metering device 12 and are scraped into the inoculation hopper 14 under the action of the seed scraping plate 20. The seeds flow into the furrows opened by the furrow opener 24 along the seeding hose 25 and the seeding rigid pipe 242, and then the soil is compacted by the driven wheel 502, thus completing the seeding of the seeds.

[0057] The present utility model can arbitrarily adjust the seeding spacing according to requirements, and at the same time, flexibly adjust the depth position of the entire seeding according to requirements, achieving the effects of accurate seeding, time-saving and labor-saving, and increasing seeding efficiency. At the same time, air suction holes with different diameters can be used to seed different types of seeds, improving the application range of the entire seeder.

[0058] The above-described embodiments are only the preferred embodiments of the present utility model, and do not limit the scope of implementation of the present utility model. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present utility model patent shall be included within the scope of the patent application of the present utility model.

Claims

1. A small seed drill based on air suction technology, comprising a movable frame (1), characterized in that: It also includes an air pump (9), a seeding mechanism and a furrowing unit arranged on the frame (1); the seeding mechanism includes an air suction shaft (11) controlled by a drive motor (10), a seed metering device (12), a hopper (13) and an inoculation hopper (14); The air suction shaft (11) is hollow inside and is rotatably arranged on the frame (1). The air suction shaft (11) is connected to the air pump (9). The air suction shaft (11) is connected to a plurality of seeding devices (12). Each seeding device (12) is provided with a plurality of groups of air suction holes of different diameters. Each group of air suction holes includes a plurality of air suction holes (19) evenly arranged along the circumference of the seeding device (12). The frame (1) is provided with a plurality of hoppers (13) that are lifted and lowered, and the hoppers (13) and the seeding device (12) correspond one to another in the upper and lower parts, and the seeding device (12) is placed in the hopper (13) below, and the inoculation hopper (14) is provided on one side of the hopper (13), and the seeds in the hopper (13) are transferred to the inoculation hopper (14) through the seeding device (12); The furrowing unit is arranged below the hopper (13), and comprises a plurality of furrowing openers (24) movably arranged on the frame (1) in an upward and downward manner and in a left and right manner. The furrowing openers (24) correspond to the hopper (13) in an upward and a downward manner. The furrowing openers (24) comprise a furrowing opener body (241) and a sowing hard pipe (242). The sowing hard pipe (242) vertically penetrates the furrowing opener body (241), and a sowing hose (25) is connected between the sowing hard pipe (242) and the inoculation hopper (14).

2. The small seeder based on air suction technology according to claim 1 is characterized in that: A driving wheel mechanism (2) and a driven wheel unit (5) are respectively arranged on the front and rear sides of the frame (1); the driving wheel mechanism (2) and the driven wheel unit (5) cooperate to support the frame (1).

3. The small-sized seeder based on air suction technology according to claim 2 is characterized in that: The driving wheel mechanism (2) comprises a driving shaft (201), a driving motor (202) and a raking wheel (203); the driving shaft (201) is rotatably arranged in front of the frame (1); the middle of the driving shaft (201) and the driving motor (202) are chain-driven; and the raking wheels (203) are arranged on both sides of the driving shaft (201); The raking wheel (203) comprises two support discs (3) arranged at intervals and a plurality of connecting rods (4) for connecting the two support discs (3); the support disc (3) is circular, and the connecting rods (4) are evenly arranged around the circumference of the support disc (3).

4. The small-sized seeder based on air suction technology according to claim 2 is characterized in that: The driven wheel unit (5) comprises a driven shaft (501) and a driven wheel (502); the driven shaft (501) is rotatably arranged behind the frame (1); a plurality of driven wheels (502) are arranged at intervals on the driven shaft (501); and the driven wheels (502) and the furrow openers (24) correspond one to one.

5. The small-sized seeder based on air suction technology according to claim 1 is characterized in that: The frame (1) is also provided with a battery pack (6) for supplying power to electrical components, a control handle (7) and a control console (8); the control handle (7) is arranged at the rear of the frame (1), and the control console (8) is arranged on the control handle (7).

6. The small-sized seeder based on air suction technology according to claim 1, characterized in that: A drive shaft (15) is rotatably arranged on the frame (1); the drive shaft (15) and the air suction shaft (11) are arranged in parallel front and back; the drive motor (10) and the drive shaft (15) are gear-driven; the drive shaft (15) and the air suction shaft (11) are belt-driven; one end of the air suction shaft (11) is closed and the other end is provided with a rotary joint (18); the air pump (9) is connected to an air pipe (17); one end of the air pipe (17) is connected to the rotary joint (18).

7. The small-sized seeder based on air suction technology according to claim 1 is characterized in that: The seed metering device (12) is a hollow cylindrical structure. The seed metering device (12) and the air suction shaft (11) are coaxially arranged. A plurality of air suction hole groups are arranged at intervals along the axial direction of the seed metering device (12). An adhesive tape for sealing the air suction hole groups is also adhered to the circumferential surface of the seed metering device (12). Two lifting sleeves (21) are arranged on the frame (1), and each lifting sleeve (21) is provided with an adjusting bolt (22). A lifting rod (23) is movably arranged between the two lifting sleeves (21), and the hopper (13) is arranged on the lifting rod (23). Both ends of the lifting rod (23) are bent vertically downward and inserted into the lifting sleeves (21), and the adjusting bolt (22) is tightly against the end of the lifting rod (23).

8. The small-sized seeder based on air suction technology according to claim 1, characterized in that: The hopper (13) is a groove structure, and there is a gap between one side wall of the hopper (13) and the circumferential side of the seed meter (12). The other side wall of the hopper (13) is provided with a wedge-shaped seed scraping plate (20). The seed scraping plate (20) and the inoculation hopper (14) are connected up and down, and the inoculation hopper (14) is funnel-shaped.

9. The small-sized seeder based on air suction technology according to claim 1, characterized in that: The frame (1) is provided with a crossbar (26), and a plurality of mounting sleeves (27) are movably disposed on the crossbar (26) to the left and right, and the furrow opener (24) is arranged on each mounting sleeve (27); Each mounting sleeve (27) comprises a transverse sleeve (271) and a vertical sleeve (272) which are vertically fixedly connected, the transverse sleeve (271) being sleeved on the transverse bar (26), and a second adjusting bolt (28) being arranged on the transverse sleeve (271), and the second adjusting bolt (28) being tightly pressed against the transverse bar (26); The sowing hard tube (242) is passed through the vertical sleeve (272), and an adjusting bolt three (29) is arranged in the vertical sleeve (272), and the adjusting bolt three (29) is tightly pressed against the sowing hard tube (242).

Images