Seeding machine

Abstract

The utility model discloses a seeder, which relates to the field of agricultural machinery and comprises a connecting part, a walking part and a plurality of seeders arranged on the back of the walking part. One end of the connecting part is connected with the walking part, and the other end is rotationally matched with the seeder; the walking part is driven and drives the seeders to work, so that seeds are sown in mud, the seeders can work simultaneously, the sowing range can be effectively enlarged, and the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, and specifically, to a seeder. Background Art

[0002] Peanut is a leguminous crop and one of the main oilseed varieties for high-quality edible oil; peanut is an annual herbaceous plant. There are more than 100 countries cultivating peanuts in the world. Peanut is praised by people as "plant meat", with an oil content as high as 50%, excellent quality, and a delicate fragrance. It can be used for food and is also a traditional Chinese medicine.

[0003] Currently, for peanut planting, generally, grooves and holes are dug in the cultivated land, and then peanut grains are placed in the dug grooves or holes. For large-area peanut sowing, such a sowing method has low efficiency, and the manual labor intensity is relatively large, which easily causes backache and body discomfort to the sowers. Summary of the Utility Model

[0004] The utility model provides a seeder, which is used to solve the technical problem of low efficiency of the manual peanut sowing method.

[0005] To achieve the above object, the utility model provides a seeder, including: a connecting part, a traveling part, and a plurality of seeders arranged on the back of the traveling part; one end of the connecting part is connected to the traveling part, and the other end is rotationally matched with the seeder.

[0006] By adopting the above technical solution, the seeder is placed in the sowing area, the traveling part is driven, and the traveling part drives the seeders to work, so as to scatter the seeds into the soil; in the prior art, the seeder often only targets single-row sowing, and the sowing efficiency is relatively low. Based on this, a plurality of seeders are arranged on the back of the traveling part, and the plurality of seeders can work simultaneously, increasing the sowing range and being beneficial to improving the working efficiency; in addition, there is a distance between the seeders, so that the seeds sown between the seeders will not compete for moisture due to too close a distance, thereby improving the survival rate of the seeds.

[0007] Further, the connecting part includes: a connecting rod horizontally arranged on the back of the traveling part, and the connecting rod is rotationally matched with the traveling part; a plurality of V-shaped connecting pieces are arranged on the connecting rod;

[0008] The seeder is arranged in the V-shaped connecting piece.

[0009] By adopting the above technical solution, the traveling part drives the seeder to move through the connecting part to realize the sowing of the seeder; and a plurality of seeders are fixedly arranged on the connecting rod.

[0010] Further, the seeder includes: a lifting mechanism for lifting the vertical height of the seeding device; the lifting mechanism includes: a first motor disposed at the bottom of the traveling part, a first bevel gear coaxially disposed on the output shaft of the first motor, a second bevel gear coaxially disposed on the connecting rod, and the second bevel gear is fixedly connected to the connecting rod; the first bevel gear is meshed with the second bevel gear for transmission

[0011] By adopting the above technical solution, the lifting mechanism is used to lift the vertical height of the seeding device. The reason is that when the seeder moves forward for seeding, when seeding is completed, the seeder needs to be stopped. If it retreats, the seeding device will re-seed the same groove. Based on this, it is necessary to use the lifting mechanism to lift the vertical height of the seeding device until it is lifted off the ground. After adjusting the seeder to the area to be seeded, use the lifting mechanism to put the seeding device back into the seeding area to achieve seeding in the area to be seeded; in addition, the operating principle of the lifting mechanism is as follows: the first motor drives the first gear, and then drives the second bevel gear, realizing the rotation of the connecting rod around its axis, making the connection point between the V-shaped connector and the connecting rod the rotation point, driving the seeding device to rotate upward, and realizing the lifting of the seeding device in the vertical height. During the process of lifting the height of the seeding device, the first motor drives the seeding device to rise. After the lifting is completed, the motor stops rotating, causing the connecting rod to stop rotating, and the seeding device is suspended and fixed, and it is not easy to fall to the ground.

[0012] Further, the traveling part includes: a transmission shaft, traveling wheels rotatably matched with the transmission shaft are provided at both ends of the transmission shaft, and a second motor for driving the transmission shaft to rotate is provided on the transmission shaft.

[0013] By adopting the above technical solution, the second motor drives the transmission shaft to operate, and then realizes the movement of the traveling wheels. When the traveling wheels move forward, the seeding device is driven to seed through the connecting part.

[0014] Further, it further includes: a mounting base fixedly provided on the transmission shaft, and the mounting base is located between the traveling wheels;

[0015] Above the mounting base, a seed box for storing seeds and a power source for supplying electric energy to the second motor are provided;

[0016] Both the second motor and the first motor are electrically connected to the power source.

[0017] By adopting the above technical solution, the mounting base is used to carry the seed box, and the seed box stores seeds for adding seeds to the seeding device to avoid seeding interruption caused by insufficient seeds.

[0018] Further, the seeder further includes: a handrail rod fixedly disposed on the back of the traveling part, and the handrail rod is located above the seeder; a handrail end for operation is provided on the handrail rod.

[0019] By adopting the above technical solution, the handrail rod is used to control the traveling direction of the traveling part.

[0020] Further, the seeder includes: a driving housing, a plurality of through first seed outlet holes are provided on the surface of the driving housing and are distributed in an annular array, and a seed distribution assembly is provided inside the driving housing;

[0021] A seed delivery assembly is provided on the outer surface of the driving housing, and the seed delivery assembly is located at the first seed outlet hole;

[0022] It further includes: a first seed storage chamber provided inside the driving housing, and a second seed outlet hole is provided at the lower end of the first seed storage chamber and is directly opposite to the seed distribution assembly.

[0023] By adopting the above technical solution, seeds are placed in the first seed storage chamber. Under the action of gravity, the seeds pass through the first seed outlet holes and are conveyed into the seed distribution assembly. The seed distribution assembly conveys the seeds into the seed delivery assembly, and the seed delivery assembly delivers the seeds to the outside. For the prior art, the seeding method of this seeder can effectively solve the problem of low efficiency of manual seeding.

[0024] Further, the seed distribution assembly includes: a distribution wheel, and seeding holes are provided on the outer surface of the distribution wheel; the driving housing is used to drive the distribution wheel to rotate in cooperation;

[0025] A limiting wheel and a limiting block are provided on the outside of the distribution wheel; there are gaps between both the limiting wheel and the limiting block and the radially outer surface of the distribution wheel.

[0026] By adopting the above technical solution, the seeding holes are directly opposite to the second seed outlet holes, so that the seeds can enter the seeding holes. The seeding holes can accommodate a fixed amount of peanut seeds. The driving housing drives the distribution wheel to rotate. The limiting wheel and the limiting block cause the fixed amount of seeds in the seeding holes not to fall out to the outside, but to fall into the first seed outlet holes, and thus are delivered to the outside through the seed delivery assembly.

[0027] Further, the seeder further includes: a fixed shaft passing through the driving housing, and the fixed shaft is coaxial with the driving housing;

[0028] Cover shells are provided at both ends of the fixed shaft in a direction perpendicular to the axial direction of the driving housing; the driving housing is rotationally matched with the cover shells.

[0029] By adopting the above technical solution, the sowing hole is opposite to the second seed outlet hole, so that the seeds can enter the sowing hole, and the sowing hole can accommodate a certain amount of peanut seeds. The driving shell drives the distribution wheel to rotate, and the limiting wheel and the limiting block ensure that the certain amount of seeds in the sowing hole will not fall out to the outside, but fall into the first seed outlet hole, and then be delivered to the outside through the seed delivery component.

[0030] Further, the seed delivery assembly comprises: a fixing box fixedly arranged on the outer surface of the driving housing and located at the first seed outlet, the fixing box is provided with a cavity interconnected with the first seed outlet and leading to the outside, a movable plate is provided at the opening of the cavity, and the movable plate is hinged to the outer surface of the driving housing;

[0031] The seed placing assembly further includes: a limit rod for opening and closing the movable plate; one end of the limit rod is connected to the movable plate, a torsion spring is wound around the limit rod, and one end of the torsion spring is relatively fixed to the driving housing;

[0032] The cover shell is provided with a limiting column located on the rotation path of the limiting rod.

[0033] By adopting the above technical solution, the fixed box and the movable plate are fitted together, and the torsion spring on the limit rod is in a normal state; when the driving shell rotates, the limit rod is driven to move, and on the trajectory of the movement of the limit rod, one end of the limit rod will touch the limit column. At this time, the movable plate rotates at the hinge point, and one end of the torsion spring is relatively fixed to the driving shell. When the limit rod continues to move, the torsion spring is continuously compressed, and at the same time, the limit rod drives the movable plate to separate from the fixed box, thereby realizing the seeds inside the fixed box being cast to the outside; when the limit column is separated from the movement path of the limit rod, the torsion spring recovers from the compressed state to the normal state, thereby making the movable plate and the fixed box fit together again.

[0034] The utility model provides a seed drill, which has at least the following technical effects:

[0035] 1. The seeder includes: a connecting part, a walking part, and a plurality of seeders arranged on the back of the walking part; one end of the connecting part is connected to the walking part, and the other end is rotatably matched with the seeder; the walking part is driven, and the walking part drives the seeder to work, so as to sow seeds in the mud, and a plurality of seeders can work at the same time, which can effectively increase the sowing range and help improve work efficiency;

[0036] 2. The seeder includes: a seed distribution component arranged inside the driving housing and a seed delivery component arranged at the first seed outlet. The utility model can deliver a certain amount of seeds into a single hole, effectively improving the sowing efficiency. It has a compact structure, is convenient and practical, and has a high degree of automation, reducing the workload of manual sowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present utility model, and constitute a part of the present utility model, but do not limit the embodiments of the present utility model;

[0038] Figure 1 It is a schematic structural diagram of a seeder in the specific implementation of the present utility model;

[0039] Figure 2 It is a side view of the seeder in the specific implementation of the present utility model;

[0040] Figure 3 It is a schematic structural diagram of a seed sower in the specific implementation of the present utility model;

[0041] Figure 4 It is a cross-sectional view of the seed sower in the specific implementation of the present utility model;

[0042] Among them, 1 - seed sower, 2 - connecting rod, 3 - L-shaped connecting rod, 4 - first motor, 5 - first bevel gear, 6 - second bevel gear, 7 - transmission shaft, 8 - walking wheel, 9 - second motor, 10 - mounting base, 11 - seed box, 12 - handrail rod, 13 - handrail end, 14 - first switch, 15 - second switch, 16 - drive housing, 17 - first seed outlet hole, 18 - first seed storage chamber, 19 - second seed outlet hole, 20 - distribution wheel, 2001 - sowing hole, 21 - limiting wheel, 22 - limiting block, 23 - fixed shaft, 24 - cover shell, 25 - fixed box, 26 - movable plate, 27 - limiting rod, 28 - torsion spring, 29 - limiting column. Detailed implementation manners

[0043] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0044] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described within the scope hereof. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0045] Embodiment 1

[0046] A seeder, please refer to Figure 1 , including: a connecting part, a walking part, and a plurality of seed sowers 1 arranged on the back of the walking part; one end of the connecting part is connected to the walking part, and the other end is rotatably matched with the seed sower 1.

[0047] In a more preferred technical solution, the connecting portion includes: a connecting rod 2 horizontally disposed on the back of the traveling portion, and the connecting rod 2 is rotationally engaged with the traveling portion; a plurality of V-shaped connecting members 3 are provided on the connecting rod 2;

[0048] The seeder 1 is disposed within the V-shaped connecting member 3.

[0049] Wherein, a circular ring sleeve is welded to one end of the V-shaped connecting member 3 away from the installation of the seeder 1, and the circular ring sleeve is coaxially disposed with the connecting rod 2; please refer to the attached Figure 2 , two sets of seeders 1 are provided on the connecting rod 2, and there is a spacing between the seeders 1 for increasing the seeding area.

[0050] Embodiment 2

[0051] On the basis of Embodiment 1, please refer to Figure 2 , the seeding machine includes: a lifting mechanism for lifting the vertical height of the seeder 1; the lifting mechanism includes: a first motor 4 disposed at the bottom of the traveling portion, a first bevel gear 5 coaxially disposed on the output shaft of the first motor 4, a second bevel gear 6 coaxially disposed on the connecting rod 2, and the second bevel gear 6 is fixedly connected to the connecting rod 2; the first bevel gear 5 and the second bevel gear 6 are engaged in transmission.

[0052] Wherein, two sets of lifting mechanisms symmetrically distributed can be provided at the bottom of the traveling portion to prevent the bending moment of the seeder 1 from being too large, and it is difficult for a single set of lifting mechanisms to lift the seeder 1 to a distance from the ground.

[0053] In a more preferred technical solution, the traveling portion includes: a transmission shaft 7, traveling wheels 8 rotatably engaged with the transmission shaft 7 are provided at both ends of the transmission shaft 7, and a second motor 9 for driving the transmission shaft 7 to rotate is provided on the transmission shaft 7.

[0054] Wherein, the traveling portion is a prior art and will not be specifically described in this embodiment.

[0055] Embodiment 3

[0056] On the basis of Embodiment 2, please refer to Figure 1 and Figure 2 , it further includes: a mounting base 10 fixedly provided on the transmission shaft 7, and the mounting base 10 is located between the traveling wheels 8;

[0057] Above the mounting base 10, a seed box 11 for storing seeds and a power source for supplying electric energy to the second motor are provided;

[0058] The second motor and the first motor 4 are both electrically connected to the power source.

[0059] Among them, the seed box 11 is divided into a seed placement box and a power supply placement box, which are separated by a partition. The seed placement box is used to store seeds, and the power supply placement box is used to place the power supply and a controller for controlling the travel direction of the walking part. The controller is electrically connected to the second motor and the first motor 4; among them, the controller is a prior art and is not described in detail in this embodiment, and the controller can be implemented by a PLC or a single-chip microcomputer.

[0060] Embodiment 4

[0061] Based on Example 3, please refer to Figure 1 The seeder further includes: a handrail 12 fixedly arranged on the back of the walking part, and the handrail 12 is located above the seeder 1; and a handrail end 13 for operation is provided on the handrail 12.

[0062] Among them, a first switch 14 for controlling the start and stop of the second motor is provided at the handrail end 13, and the first switch is electrically connected to the controller and the power supply, and the movement of the seeder is realized by the first switch 14; a second switch 15 for controlling the start and stop of the first motor 4 is also provided at the handrail end, and the second switch is electrically connected to the controller and the power supply, and the vertical height of the seeder 1 is lifted by the lifting mechanism through the second switch 15.

[0063] Embodiment 5

[0064] Based on Example 4, please refer to Figure 3 and Figure 4 The seeder 1 comprises: a driving housing 16, a surface of the driving housing 16 is provided with a plurality of first seed holes 17 distributed in an annular array, and a seed distribution assembly is provided inside the driving housing 16;

[0065] A seed delivery assembly is provided on the outer surface of the driving housing 16, and the seed delivery assembly is located at the first seed outlet 17;

[0066] The drive housing 16 further comprises a first seed storage chamber 18 disposed inside the drive housing 16, wherein a second seed outlet hole 19 facing the seed distribution assembly is disposed at a lower end of the first seed storage chamber 18.

[0067] Among them, the driving housing 16 is in a circular ring shape, and a number of seed dropping components are arranged in an annular array on the outer surface of the driving housing 16, and the seed dropping components are located at the first seed outlet holes 17. That is, a seed dropping component is provided at each first seed outlet hole 17. For example, if there are 8 first seed outlet holes 17 on the driving housing 16, then 1 seed dropping component is correspondingly provided at each first seed outlet hole 17, and there are a total of 8 seed dropping components outside the driving housing 16, but there is only one seed distribution component inside a seeder 1, and the seed distribution component is arranged at the bottom inside the driving housing 16, which facilitates the seeds to enter the seed distribution component under the action of gravity.

[0068] Embodiment Six

[0069] On the basis of Embodiment Five, please refer to Figure 3 , the seed distribution component includes: a distribution wheel 20, and sowing holes 2001 are provided on the outer surface of the distribution wheel 20; the driving housing 16 is used to drive the distribution wheel 20 to rotate in cooperation;

[0070] A limiting wheel 21 and a limiting block 21 are provided outside the distribution wheel 20; there are gaps between both the limiting wheel 21 and the limiting block 21 and the radial outer surface of the distribution wheel 20.

[0071] Among them, a number of sowing holes 2001 are arranged in an annular array on the distribution wheel 20, and the distribution wheel 20 and the driving housing 16 are driven by gear meshing. The principle of a seeder to achieve quantitative sowing is as follows:

[0072] Please refer to the attached Figure 4 , the arc length corresponding to A and B on the driving housing 16 is equal to the arc length corresponding to C and D on the distribution wheel 20. Please refer to Figure 3 , the first seed outlet hole 17B is directly opposite to the sowing hole 2001C, and the first seed outlet hole B is the lowest hole in the driving housing 16, which facilitates the seeds to be dropped into the first seed outlet hole B under the action of gravity. The sowing hole D is directly opposite to the second seed outlet hole 19. When the driving housing 16 drives the distribution wheel 20 to rotate counterclockwise through a gear connection, the first seed outlet hole A moves to the lowest point position, and the first seed outlet hole B moves to the right. At this time, the sowing hole C moves to the highest point, that is, the sowing hole C is directly opposite to the second seed outlet hole 19, and the sowing hole D runs to the lowest point at this time, and the sowing hole D is directly opposite to the first seed outlet hole A. At the same time, the seeds in the sowing hole D are conveyed into the first seed outlet hole A and at the same time conveyed into the seed dropping component; repeating the above process can achieve the dropping of a quantitative amount of seeds into a single hole.

[0073] Embodiment Seven

[0074] On the basis of Embodiment Six, please refer to Figure 3 and Figure 4, the seeder 1 further includes: a fixed shaft 23 passing through the drive housing 16, and the fixed shaft 23 is coaxial with the drive housing 16;

[0075] Both ends of the fixed shaft 23 are provided with a housing 24 perpendicular to the axial direction of the drive housing 16; the drive housing 16 is rotationally matched with the housing 24.

[0076] Among them, the fixed shaft 23 is fixedly connected to the housing 24, and the housing 24 plays a supporting role for the drive housing 16. At the same time, the drive housing 16 rotates around the housing 24.

[0077] Embodiment Eight

[0078] On the basis of Embodiment Seven, please refer to Figure 3 and Figure 4 , the seed delivery assembly includes: a fixed box 25 fixedly arranged on the outer surface of the drive housing 16 and located at the first seed outlet hole 17. The fixed box 25 is provided with a cavity communicating with the first seed outlet hole 17 and leading to the outside. An activity plate 26 is arranged at the opening of the cavity, and the activity plate 26 is hinged to the outer surface of the drive housing 16;

[0079] The seed delivery assembly further includes: a limit rod 27 for opening and closing the activity plate 26; one end of the limit rod 27 is connected to the activity plate 26, and a torsion spring 28 is wound around the limit rod 27, and one end of the torsion spring 28 is relatively fixed to the drive housing 16;

[0080] The housing 24 is provided with a limit post 29 located on the rotation path of the limit rod 27.

[0081] Among them, when the activity plate 26 and the fixed box 25 are in a fitting state, the whole is in a duckbill shape; two limit posts 29 are arranged on the housing 24, and the two limit posts 29 are horizontally arranged and are both located on the rotation path of the limit rod 27. At this time, there is a gap between the two limit posts 29; when the limit rod 27 touches the first limit post 29, the activity plate 26 opens to deliver the seeds in the fixed box 25; however, at this time, it may cause the seeds in the fixed box 25 not to be completely discharged during the process of the activity plate 26 opening and closing again, and the quantitative delivery of seeds into a single hole cannot be achieved. Therefore, when the limit rod 27 completely disengages from the first limit post 29, the limit rod 27 immediately touches the second limit post 29, causing the activity plate 26 to open again to discharge the remaining seeds inside. At the same time, there may also be a situation where when the seeds are delivered into the fixed box 25, some seeds adhere to the inner wall of the fixed box 25. When the activity plate 26 is opened for the first time, the seeds inside cannot be delivered to the outside. When the activity plate 26 closes quickly, it will cause vibration to the fixed box 25, thereby shaking off the seeds adhering to the inner wall. When the activity plate 26 is opened for the second time, the remaining seeds inside can be delivered.

[0082] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0083] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A seed drill, characterized in that: include: A connecting part, a walking part, and a plurality of seed drills (1) arranged on the back of the walking part; One end of the connecting part is connected to the walking part, and the other end is rotationally matched with the seeder (1); The connecting part comprises: a connecting rod (2) arranged transversely on the back of the walking part, and the connecting rod (2) is rotatably matched with the walking part; a plurality of V-shaped connecting pieces (3) are arranged on the connecting rod (2); The seeder (1) is arranged in a V-shaped connecting piece (3).

2. A seed drill according to claim 1, characterized in that: The seed drill comprises: a lifting mechanism for lifting the vertical height of the seed drill (1); the lifting mechanism comprises: a first motor (4) arranged at the bottom of the walking part, a first bevel gear (5) coaxially arranged on the output shaft of the first motor (4), a second bevel gear (6) coaxially arranged on the connecting rod (2), and the second bevel gear (6) is fixedly connected to the connecting rod (2); the first bevel gear (5) and the second bevel gear (6) are meshed and transmitted.

3. A seed drill according to claim 2, characterized in that: The walking part comprises: a transmission shaft (7), two ends of the transmission shaft (7) are provided with walking wheels (8) which are rotatably matched with the transmission shaft (7), and the transmission shaft (7) is provided with a second motor (9) for driving the transmission shaft (7) to rotate.

4. A seed drill according to claim 3, characterized in that: Also includes: A mounting base (10) fixedly arranged on the transmission shaft (7), wherein the mounting base (10) is located between the running wheels (8); A seed box (11) for storing seeds and a power source for providing electric energy to the second motor are provided above the mounting base (10); The second motor and the first motor (4) are both electrically connected to the power supply.

5. A seed drill according to claim 4, characterized in that: The seeder further comprises: a handrail (12) fixedly arranged on the back of the walking part, and the handrail (12) is located above the seeder (1); and a handrail end (13) for operation is provided on the handrail (12).

6. The seed drill according to claim 1, characterized in that: The seeder (1) comprises: a driving housing (16), a surface of the driving housing (16) being provided with a plurality of first seed outlet holes (17) distributed in an annular array, and a seed distribution assembly being provided inside the driving housing (16); A seed delivery assembly is provided on the outer surface of the driving housing (16), and the seed delivery assembly is located at the first seed outlet hole (17); It also comprises: a first seed storage chamber (18) arranged inside the driving housing (16), wherein the lower end of the first seed storage chamber (18) is provided with a second seed outlet hole (19) facing the seed distribution assembly.

7. A seed drill according to claim 6, characterized in that: The seed distribution assembly comprises: a distribution wheel (20), the outer surface of which is provided with a sowing hole (2001); the driving housing (16) is used to drive the distribution wheel (20) to rotate and cooperate; A limiting wheel (21) and a limiting block (22) are provided on the outer side of the distribution wheel (20); a gap is provided between the limiting wheel (21) and the limiting block (22) and the radial outer surface of the distribution wheel (20).

8. A seed drill according to claim 7, characterized in that: The seeder (1) further comprises: a fixed shaft (23) passing through the drive housing (16), wherein the fixed shaft (23) is coaxial with the drive housing (16); Both ends of the fixed shaft (23) are provided with covers (24) perpendicular to the axial direction of the drive housing (16); the drive housing (16) and the cover (24) are rotationally matched.

9. A seed drill according to claim 8, characterized in that: The seed placement assembly comprises: a fixed box (25) fixedly arranged on the outer surface of the drive housing (16) and located at the first seed outlet hole (17); the fixed box (25) is provided with a cavity which is interconnected with the first seed outlet hole (17) and leads to the outside; a movable plate (26) is provided at the opening of the cavity, and the movable plate (26) is hinged to the outer surface of the drive housing (16); The seed placing assembly further comprises: a limiting rod (27) for opening and closing the movable plate (26); one end of the limiting rod (27) is connected to the movable plate (26); a torsion spring (28) is wound around the limiting rod (27); one end of the torsion spring (28) is relatively fixed to the driving housing (16); The cover shell (24) is provided with a limiting column (29) located on the rotation path of the limiting rod (27).

Images