Precise seeder suitable for rice drilling seedling raising

Abstract

The precision seeder comprises a seed supply mechanism, a seed filling roller and a seed cleaning mechanism, and the seed supply mechanism comprises a vibration plate, a bottom plate, a lining plate, a back plate, a side plate and a rubber sheet; the bottom plate is located on the lower side, the back plate is located on the outer side, the two side plates are located on the left side and the right side, the vibration plate is located on the inner side, a gap is reserved between the lower end of the vibration plate and the bottom plate, and the lining plate is placed on the bottom plate and penetrates through the gap. Swinging needles are arranged on the two sides of the lining plate, annular wave-shaped grooves are formed in the edges of the two sides of the outer circumference of the seed filling roller, and the swinging needles are embedded into the wave-shaped grooves, so that when the seed filling roller rotates, the lining plate swings left and right along with the wave-shaped grooves in a reciprocating manner; the rubber sheet covering the gap between the lining plate and the side plate is mounted on the side plate; and the seed cleaning mechanism is arranged on the side plate. The device can realize the functions of precise strip-shaped seed filling, elastic seed cleaning and seed storage quantity monitoring, is beneficial to saving seeds and improving the precise strip-shaped seed filling rate of rice, and belongs to the field of rice seedling raising and sowing equipment.

Description

Technical Field

[0001] This invention relates to the field of rice seedling raising and sowing equipment, specifically to a precision seeder suitable for rice strip sowing, applicable to precision strip sowing operations for rice and other seedling tray raising. Background Technology

[0002] Rice is one of my country's most important food crops, and the seedling raising stage in its cultivation process is crucial to the final yield. Row seedling raising, as an advanced agronomic technique, provides seedlings with uniform growing space, promotes ventilation and light penetration, reduces disease occurrence, and thus cultivates robust and uniform seedlings, laying a solid foundation for subsequent mechanized transplanting.

[0003] The key equipment for achieving rice row sowing is the precision seeder. Currently, the commonly used roller seeder is widely used due to its simple structure and low cost. However, existing roller seeders still have several problems to be solved when used for rice sowing. First, rice seeds are irregular in shape, vary in size, and have rough surfaces, which can easily cause gaps during the seed filling process, leading to uneven filling and increased missed sowing rate. Second, traditional seed cleaning methods (such as brushes) are difficult to accurately remove excess or irregularly shaped seeds from the seed filling trough. Incomplete cleaning can lead to re-sowing, while over-cleaning can exacerbate missed sowing, making it difficult to achieve the precision sowing requirement of "three seeds per hole". In addition, existing seeders have poor adaptability to different varieties and rice seeds with different moisture contents, and the adjustment process is cumbersome, affecting the efficiency and stability of the sowing operation.

[0004] Therefore, there is an urgent need in this field for a precision seeder designed specifically for the physical characteristics of rice seeds, which can effectively promote seed flow, improve seed filling efficiency, and achieve precise, gentle, and reliable seed cleaning to significantly reduce the rate of missed sowing and reseeding, and ultimately ensure the quality of rice row sowing and seedling raising. Summary of the Invention

[0005] In view of the technical problems existing in the prior art, the purpose of this invention is to provide a precision seeder suitable for rice row sowing and seedling raising, which can effectively realize the dynamic leveling of rice seeds.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A precision seeder suitable for rice row sowing includes a seed supply mechanism, a seed filling roller, and a seed cleaning mechanism. The seed supply mechanism includes a vibrating plate, a base plate, a liner plate, a back plate, side plates, and a film. The base plate, back plate, and two side plates are fixedly connected, with the base plate located on the lower side, the back plate on the outer side, and the two side plates on the left and right sides. The vibrating plate is installed between the two side plates, located on the inner side, with a gap between the lower end of the vibrating plate and the base plate. The liner plate is placed on the base plate and passes through this gap, with the outer side of the liner plate pressing against the back plate, and the inner side of the liner plate connecting to the seed filling roller. The inner side of each side plate is equipped with a liner height limiting block; the length of the liner is less than that of the bottom plate along the left and right direction; both sides of the liner are equipped with swing pins, and both sides of the outer circumference of the seed filling roller are equipped with annular wavy grooves. The swing pins are embedded in the wavy grooves, so that when the seed filling roller rotates, the liner swings back and forth with the wavy grooves; a film covering the gap between the liner and the side plate is installed on the side plate. The vibrating plate, the liner, the back plate, and the two side plates form a space for accommodating seeds, and a seed outlet is formed between the vibrating plate and the liner; the seed cleaning mechanism is installed on the side plate.

[0007] As a preferred embodiment, the base plate includes a vertical plate, a horizontal plate, and an inclined plate connected in sequence. The vertical plate is located inside the horizontal plate, and the inclined plate is located outside the horizontal plate and connected to the back plate. The upper end of the vertical plate is higher than the horizontal plate, and multiple semi-circular support blocks are provided on the inclined plate. The liner is supported between the vertical plate and the semi-circular support blocks.

[0008] As a preferred embodiment, the liner is made of an elastic material; the liner is inclined from the upper outside to the lower inside, the oscillating needle is set parallel to the liner, and the end of the oscillating needle extends out of the inner side of the liner.

[0009] As a preferred embodiment, the wavy groove is recessed inward from the surface of the filling roller, and the wavy groove is provided with a number of small protrusions that lift the passing pendulum needles; the distance between two adjacent filling grooves in the circumferential direction in the filling roller is equal to the circumferential length of one wave cycle in the wavy groove.

[0010] As a preferred embodiment, the outer circumference of the seed filling roller is provided with at least one set of seed filling grooves, with one set of seed filling grooves corresponding to one seedling tray; each set of seed filling grooves includes multiple seed filling grooves arranged along the circumferential direction, the length direction of each seed filling groove is arranged along the left and right direction, and a set of "Y"-shaped seed cleaning slits are opened in the interval between two adjacent seed filling grooves. A set of "Y"-shaped seed cleaning slits includes multiple "Y"-shaped seed cleaning slits arranged at equal intervals on the left and right, and the large opening of the "Y"-shaped seed cleaning slits faces the same direction as the rotation direction of the seed filling roller; each set of "Y"-shaped seed cleaning slits is aligned with each other in the circumferential direction; the seed cleaning mechanism includes a steel plate and multiple bundles of steel wires fixed on the steel plate, the steel plate is installed between two side plates, and the multiple bundles of steel wires are arranged at equal intervals on the left and right direction, aligned with the "Y"-shaped seed cleaning slits, the steel wires extend into the "Y"-shaped seed cleaning slits, and the length of the steel wires extending into the "Y"-shaped seed cleaning slits is slightly greater than the depth of the "Y"-shaped seed cleaning slits.

[0011] As a preferred embodiment, the seed filling groove includes a curved surface and an inclined surface, with rounded corners between the curved surface and the inclined surface, forming a concave structure with a crescent-shaped cross-section.

[0012] As a preferred embodiment, the inner side of the side plate is provided with an arc-shaped portion that mates with the seed filling roller, and a rubber sealing plate is provided at the arc-shaped portion to cover the gap between the arc-shaped portion and the seed filling roller to prevent seed leakage.

[0013] As a preferred embodiment, the side plate is provided with straight groove holes for adjusting the installation height of the vibrating plate, and also with arc groove holes for adjusting the tilt angle of the vibrating plate.

[0014] As a preferred embodiment, the back plate is inclined from the upper outside to the lower inside; the back plate is provided with four horizontal mounting holes for seed quantity monitoring sensors, which are located at the intersection of the three bisectors of the back plate, for mounting the four seed quantity monitoring sensors; the four seed quantity monitoring sensors are divided into upper and lower groups, and each group of seed quantity monitoring sensors includes two seed quantity monitoring sensors installed at the same height; the seed quantity monitoring sensors are diffuse reflection sensors.

[0015] As a preferred embodiment, the vibrating plate includes two hollow vibrating plates and one solid vibrating plate, with the solid vibrating plate located in the middle and the hollow vibrating plates located on the left and right sides of the solid vibrating plate. The solid and hollow vibrating plates are connected to each other by an "L"-shaped structure. The vibration motor is installed in the center of the inner side of the solid vibrating plate.

[0016] The principle of this invention is as follows: Addressing the issue of irregular rice seed shapes, varying sizes, and rough surfaces, which easily lead to seed bridging and unreliable seed cleaning, the seeder is optimized to achieve precise row sowing. A slightly reciprocating lining plate is used to effectively level the rice seeds, preventing seed bridging and missed sowing. The seed supply mechanism is also optimized based on the reciprocating lining plate structure. A wire-type seed cleaning mechanism that engages with a "Y"-shaped seed cleaning seam effectively cleans the rice seeds. A seed storage capacity detection structure consisting of four seed storage capacity monitoring sensors is designed to indirectly monitor the seed storage capacity. A vibrating plate structure combining solid and hollow sections is designed to reduce vibration decay and ensure more uniform vibration across the entire plate. This vibration vibrates the seeds between the vibrating plate and the back plate, causing the seeds to be evenly discharged from the seed outlet at the bottom of the vibrating plate, filling the seed filling roller.

[0017] The present invention has the following advantages: 1. The reciprocating swing liner structure enables precise strip filling of seeds. The swing pins fixed to both sides of the liner are embedded in the wave-shaped groove of the filling roller. When the filling roller rotates, the wave profile of the groove drives the swing pin to produce axial micro-displacement, so that the protrusion of the liner continuously fits against the outer circle of the filling roller and vibrates axially, realizing real-time dynamic leveling of the seeds.

[0018] 2. The seed cleaning mechanism of the present invention can realize elastic seed cleaning formed by the release of elastic deformation potential energy of steel wire. When the filling drum rotates, the steel wire is elastically deformed by the radial support of the inclined wall of the seed cleaning slot. The accumulated elastic potential energy is released at the moment the steel wire moves out of the seed cleaning slot and enters the filling groove, thus directionally ejecting redundant seeds in the filling groove that exceed the thickness of a single layer.

[0019] 3. Four seed storage monitoring sensors are used to indirectly monitor the seed storage quantity and status, which facilitates timely adjustments by operators to optimize subsequent seed filling conditions.

[0020] 4. Optimize the structure of the vibrating plate to make the vibration more uniform, so that the seeds can be discharged evenly.

[0021] 5. Small protrusions are set in the wavy groove, which causes the liner to vibrate periodically to quickly shake out the seeds and prevent the fuzz on the surface of the rice seeds from sticking to the liner and affecting the filling effect.

[0022] 6. The side plate adopts an adjustable height and angle installation structure, which can adjust the state of the side plate according to the seed filling situation, thereby indirectly adjusting the size of the seed outlet. Attached Figure Description

[0023] Figure 1 This is a three-dimensional diagram of a precision seeder suitable for rice row seedling raising.

[0024] Figure 2 These are the front view and sectional view of the vibrating plate.

[0025] Figure 3 It is a three-dimensional structural diagram of the base plate, back plate, and side plates.

[0026] Figure 4 This is a three-dimensional view of the lining plate.

[0027] Figure 5 These are front and half-sectional views of the seed filling roller.

[0028] Figure 6 This is a 3D diagram of the seed clearing facility.

[0029] Figure 7 This is a cross-sectional view of a precision seeder suitable for rice row seedling raising.

[0030] Figure 8 This is a magnified view of a portion of the wavy groove on the seed filling roller.

[0031] Figure 9 This is a magnified view of a section of the "Y"-shaped suture.

[0032] Figure 10 This is a structural diagram of the seed filling tank.

[0033] In the diagram: 1-Vibrating plate, 11-Hollow vibrating plate, 12-Solid vibrating plate, 13-Vibration motor, 2-Base plate, 21-Vertical plate, 22-Horizontal plate, 23-Inclined plate, 3-Liner plate, 31-Swing needle, 4-Back plate, 41-Horizontal mounting hole for seed storage monitoring sensor, 5-Side plate, 51-Straight groove hole, 52-Arc groove hole, 53-Liner plate height limit block, 54-Rubber sealing plate, 6-Seed filling roller, 61-Wave groove, 62-Seed filling groove, 63-“Y”-shaped seed cleaning seam, 7-Seed cleaning mechanism, 71-Steel sheet, 72-Steel wire. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to specific embodiments.

[0035] like Figure 1 As shown, a precision seeder suitable for rice row sowing includes a seed supply mechanism, a seed filling roller 6, a seed cleaning mechanism 7, and a seed protection mechanism (located on one side of the seed filling roller, not shown, similar to existing technology). The seed supply mechanism includes a vibrating plate 1, a base plate 2, a liner plate 3, a back plate 4, side plates 5, and a film (not shown in the figure). The vibrating plate 1 is vertically installed between the two side plates 5, standing upright and at a fixed distance from the base plate 2. The base plate 2 is installed between the two side plates 5, connected to the bottom of the back plate 4, and there is a 5mm distance between the base plate 2 and the seed filling roller 6. The liner plate 3 is supported by the base plate 2 and is located between the base plate 2 and the vibrating plate 1. The two side plates 5 are arranged in parallel, with the inner arc portion of the side plate 5 coaxial with the seed filling roller, and the top plane of the side plate 5 remaining horizontal. The back plate 4 is installed between the two side plates 5, with the top of the back plate 4 and the top of the side plate 5 on the same plane, and the back plate 4 is perpendicular to the side plate 5. The seed filling roller 6 is fixedly installed on the seeder frame. The seed cleaning mechanism 7 is installed on the side plate 5 and is fitted to the seed filling roller 6.

[0036] like Figure 2 As shown, the vibrating plate 1 consists of two hollow vibrating plates 11 and one solid vibrating plate 12. The solid vibrating plate 12 is located in the middle, and the hollow vibrating plates 11 are located on both sides of the solid vibrating plate 12. The solid vibrating plate 12 and the hollow vibrating plate 11 are connected to each other by an "L"-shaped structure. The solid vibrating plate 12 has two mounting holes for the vibrating motor. The vibrating motor 13 is installed in the center of the solid vibrating plate 12 with its eccentric vibrating block facing downwards. The vibrating motor 13 is installed on the side facing the seed filling roller 6. The bottom of the plane connecting the hollow vibrating plate 11 to the side plate 5 has a threaded hole, and the upper part has a straight groove hole with a slider with internal threads in the straight groove hole. The vibrating motor 13 transmits vibration to the hollow vibrating plate 11 through the solid vibrating plate 12, which can greatly reduce the vibration attenuation. The vibrating plate 1 is installed in the straight groove hole through a threaded part. The size of the seed outlet can be adjusted by adjusting the height of the vibrating plate. The vibrating plate 1 is installed in the arc groove hole through a threaded part. The angle can be adjusted to change the direction of vibration, thereby changing the seed supply speed.

[0037] like Figure 3 As shown, the base plate 2 includes a vertical plate 21, a horizontal plate 22, and an inclined plate 23. The vertical plate 21 and the inclined plate 23 are located on both sides of the horizontal plate 22, with the vertical plate 21 located on the side where the seed filling roller 6 is located. The inclined plate 23 is connected to the back plate 4. Multiple semi-circular support blocks are provided on the inclined plate 23, and these support blocks are evenly distributed in a line on the inclined plate and close to the back plate. The upper end of the vertical plate 21 is higher than the horizontal plate and is used to support the liner plate. The liner plate 3 is supported by the semi-circular support blocks on the inclined plate 23 and the vertical plate 21. The bottom of the liner plate 3 has a hollow structure, allowing the liner plate 3 to undergo large elastic deformation when subjected to external force, thereby generating a large amplitude and frequency of vibration.

[0038] like Figure 4 As shown, the liner 3 is made of elastic material, using a 0.2mm thick carbon fiber plate, and is located above the base plate 2, supported by the semi-circular support blocks of the vertical plate 21 and the inclined plate 23. In the front-to-back direction, the width of the liner 3 is slightly greater than the width of the base plate 2, allowing the protruding part of the liner 3 relative to the base plate 2 to fit against the outer surface of the seed filling roller 6. In the left-to-right direction, the length of the liner 3 is slightly less than the length of the base plate 2, allowing the liner 3 to move slightly left and right relative to the base plate 2. Swing pins 31 are fixed to both sides of the liner 3, and the swing pins 31 are embedded in the wavy grooves 61 of the seed filling roller 6. Through the swing pins 31 fixed to both sides of the liner 3 and embedded in the wavy grooves 61 of the seed filling roller 6, when the seed filling roller 6 rotates, the wavy contour of the groove drives the swing pins to produce axial micro-displacement, causing the protruding part of the liner 3 to continuously fit against the outer surface of the seed filling roller 6 and vibrate axially, achieving real-time dynamic leveling of the seeds.

[0039] like Figure 5 As shown, the wavy groove 61 of the seed filling roller 6 is located on both sides (axial ends) of the outer circumferential surface of the seed filling roller 6, and has a predetermined depth. The wavy groove 61 has small protrusions of a certain height inside, such as... Figure 8 As shown, the distance between two adjacent seed filling grooves in the seed filling roller is equal to the circumferential length of one wave cycle in the wavy groove, that is, the distance between adjacent seed filling grooves is equal to the distance between adjacent wave crests. By having the pendulum pins 31, fixed to both sides of the liner plate 3, obliquely embedded in the wavy groove 61, when the seed filling roller 6 rotates, the contact action between the small protrusions inside the wavy groove 61 and the pendulum pins 31 drives the liner plate 3 to synchronously generate axial horizontal displacement and vertical vibration, thereby achieving dynamic homogenization and directional filling of the seeds.

[0040] like Figure 3As shown, the back plate 4 is installed at a certain angle. The back plate 4 has four horizontal mounting holes for seed quantity monitoring sensors, which are located at the intersection of the three-part lines (left and right thirds, and top and bottom thirds) of the back plate. Each pair of seed quantity monitoring sensors forms a group, divided into two groups, and the two seed quantity monitoring sensors in each group are arranged horizontally. The seed quantity monitoring sensors are diffuse reflection sensors. The seed storage level is indirectly monitored by sensing the seed surface height using diffuse reflection sensors located on the same horizontal plane. When neither of the two seed storage level monitoring sensors at the bottom detects a reflection signal, it indicates that the seed storage level is below the preset lower threshold, and the operator needs to replant in time. When both of the two seed storage level monitoring sensors at the top detect a reflection signal, it indicates that the seed storage level has reached or exceeded the preset upper threshold, and the operator should suspend replanting. When both of the two seed storage level monitoring sensors on one side detect a reflection signal, while only the bottom sensor on the other side detects a signal and the top sensor does not detect a signal, it indicates that the seed storage layer is tilted with one side higher than the other. In this case, the operator needs to level the seed storage layer to optimize subsequent replanting conditions.

[0041] like Figure 3 As shown, there are two side plates 5, located on both sides of the vibrating plate 1. The side plates 5 are provided with straight groove holes 51 for adjusting the height of the vibrating plate 1, and arc groove holes 52 for adjusting the tilt angle of the vibrating plate 1. A liner height limiting block 53 is provided on the inner side of the side plate 5. A rubber sealing plate 54 for preventing seed leakage is provided between the arc portion of the side plate 5 and the seed filling roller. By adjusting the straight groove holes 51 and the arc groove holes 52, the vertical displacement and vibration direction vector of the vibrating plate 1 can be controlled in a coordinated manner. At the same time, the liner height limiting block 53 constrains the vertical amplitude of the liner 3, and the rubber sealing plate 54 forms a dynamic sealing interface to block the seed leakage path.

[0042] like Figure 5 As shown, the seed filling roller 6 is circumferentially arranged with spaced seed filling grooves 62. The spacing between the seed filling grooves 62 is equal to the row sowing spacing of the rice seedling tray. Multiple equally spaced "Y"-shaped seed cleaning slits 63 are cut into the spaces between the seed filling grooves 62. The opening of the "Y"-shaped seed cleaning slits 63 faces the same direction as the rotation of the seed filling roller 6, i.e., the larger opening faces the same direction of rotation. The depth of the "Y"-shaped seed cleaning slits 63 is the diameter of the largest cross-section along the long axis of the rice seed, which is less than the depth of the seed filling groove. When the seed filling roller 6 rotates, the steel wire 72 and the "Y"-shaped sidewall of the seed cleaning slits work together to forcibly peel off redundant seeds exceeding the two-layer seed-holding thickness of the seed filling grooves 62. The "Y"-shaped opening structure guides the steel wire 72 to maintain precise alignment under vibration conditions. The front section of the "Y"-shaped seed cleaning slit is an isosceles trapezoid to facilitate the guidance of the steel wire, while the rear section is rectangular.

[0043] like Figure 5As shown, the seed filling trough includes a curved surface and an inclined surface, with rounded corners between them. The curved surface and the inclined surface together form a crescent-shaped concave structure. The vertical distance between the deepest part of the trough and the outer surface of the seed filling roller 6 is equal to 2.5 times the diameter of the largest cross-section along the long axis of the rice grain. The opening width of the trough is equal to 3.5 times the diameter of the largest cross-section along the long axis of the rice grain. The opening length of the trough is 60 cm, consistent with the length of the rice seedling tray. Through this structure, when the seed filling trough 62 is filled, the seeds form two to three layers of seed strips on the curved surface, and when the seed filling roller rotates to the seed discharge position, the seed strips slide down from the inclined surface of the seed filling trough 62 onto the seedling tray.

[0044] like Figure 6 As shown, the seed cleaning mechanism 7 consists of several steel plates 71 and steel wires 72. The steel wires 72 are evenly spaced between the steel plates 71, with a certain distance between each steel wire. The seed cleaning steel wires 72 are circumferentially aligned with the "Y"-shaped seed cleaning slot 63, and the length of the steel wires 72 penetrating the "Y"-shaped seed cleaning slot 63 is slightly greater than the depth of the "Y"-shaped seed cleaning slot 63. When the seed filling roller 6 rotates, the steel wires 72 undergo elastic deformation due to the radial support of the inclined wall of the "Y"-shaped seed cleaning slot. The accumulated elastic potential energy is released the instant the steel wires 72 move out of the "Y"-shaped seed cleaning slot 63 and enter the seed filling groove 62, thus directionally ejecting redundant seeds exceeding the thickness of a single layer from the seed filling groove 62.

[0045] like Figure 7 As shown, when the precision seeder is working, the seed filling roller rotates counterclockwise. Seeds fall into the seed filling troughs through the liner, and then, as the seed filling roller rotates, the seed cleaning mechanism above sweeps away excess seeds. The seeds then enter the seed guarding mechanism (not shown in the figure, located on the left side of the seed filling roller, similar to existing technology). After leaving the seed guarding mechanism, the seeds fall to the seedling trays below by gravity, achieving row sowing. In this embodiment, the seed filling roller has three sets of seed filling troughs, and one rotation can sow seeds in three seedling trays.

[0046] This invention enables precise strip seed filling, elastic seed cleaning, and seed storage monitoring, which helps to save seeds and improve the precision strip seed filling rate of rice.

[0047] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A precision seeder suitable for rice row sowing and seedling raising, comprising a seed supply mechanism, a seed filling roller, and a seed cleaning mechanism, characterized in that: The seed supply mechanism includes a vibrating plate, a base plate, a liner plate, a back plate, side plates, and a film. The base plate, back plate, and two side plates are fixedly connected, with the base plate on the bottom and the back plate on the outside. The two side plates are located on the left and right sides. The vibrating plate is installed between the two side plates, with the vibrating plate on the inside. A gap is left between the lower end of the vibrating plate and the base plate. The liner plate is placed on the base plate and passes through this gap. The outer side of the liner plate rests against the back plate, and the inner side of the liner plate connects with the seed filling roller. The inner sides of both side plates are provided with liner plate height limiting blocks. Along the left and right direction, the length of the liner plate is less than that of the base plate. Both sides of the liner plate are provided with swing needles. Both sides of the outer circumference of the seed filling roller are provided with annular wavy grooves. The swing needles are embedded in the wavy grooves, so that when the seed filling roller rotates, the liner plate swings back and forth with the wavy grooves. A film covering the gap between the liner plate and the side plates is installed on the side plates. The vibrating plate, liner plate, back plate, and two side plates form a space for accommodating seeds, and a seed outlet is formed between the vibrating plate and the liner plate. A seed cleaning mechanism is installed on the side plates.

2. A precision seeder for rice row seedling raising as described in claim 1, characterized in that: The base plate consists of a vertical plate, a horizontal plate, and an inclined plate connected in sequence. The vertical plate is located inside the horizontal plate, and the inclined plate is located outside the horizontal plate and connected to the back plate. The upper end of the vertical plate is higher than the horizontal plate. Multiple semi-circular support blocks are provided on the inclined plate, and the liner is supported between the vertical plate and the semi-circular support blocks.

3. A precision seeder suitable for rice row seedling raising according to claim 1, characterized in that: The liner is made of elastic material; the liner is inclined from the upper outside to the lower inside, the oscillating needle is set parallel to the liner, and the end of the oscillating needle extends out of the inner side of the liner.

4. A precision seeder suitable for rice row seedling raising according to claim 1, characterized in that: The wavy groove is recessed inward from the surface of the filling roller, and there are multiple small protrusions in the wavy groove that lift the passing pendulum needle; the distance between two adjacent filling grooves in the circumferential direction in the filling roller is equal to the circumferential length of one wave cycle in the wavy groove.

5. A precision seeder suitable for rice row seedling raising according to claim 1, characterized in that: The seed filling roller has at least one set of seed filling grooves on its outer circumference, with one set of seed filling grooves corresponding to one seedling tray. Each set of seed filling grooves includes multiple seed filling grooves arranged circumferentially. The length direction of each seed filling groove is set along the left-right direction. A set of "Y"-shaped seed cleaning slits is opened in the interval between two adjacent seed filling grooves. A set of "Y"-shaped seed cleaning slits includes multiple "Y"-shaped seed cleaning slits arranged at equal intervals on the left and right sides. The large opening of the "Y"-shaped seed cleaning slits faces the same direction as the rotation direction of the seed filling roller. Each set of "Y"-shaped seed cleaning slits is aligned with each other in the circumferential direction. The seed cleaning mechanism includes a steel plate and multiple bundles of steel wires fixed on the steel plate. The steel plate is installed between two side plates. The multiple bundles of steel wires are arranged at equal intervals on the left and right sides, aligned with the "Y"-shaped seed cleaning slits. The steel wires extend into the "Y"-shaped seed cleaning slits, and the length of the steel wires extending into the "Y"-shaped seed cleaning slits is slightly greater than the depth of the "Y"-shaped seed cleaning slits.

6. A precision seeder suitable for rice row seedling raising according to claim 5, characterized in that: The seed filling groove includes a curved surface and an inclined surface, with rounded corners between the curved surface and the inclined surface, forming a concave structure with a crescent-shaped cross-section.

7. A precision seeder suitable for rice row seedling raising according to claim 1, characterized in that: The inner side of the side plate is provided with an arc-shaped part that mates with the seed filling roller. A rubber sealing plate is provided at the arc-shaped part to cover the gap between the arc-shaped part and the seed filling roller to prevent seed leakage.

8. A precision seeder for rice row seedling raising according to claim 1, characterized in that: The side plate is provided with straight groove holes for adjusting the installation height of the vibrating plate, and also with arc groove holes for adjusting the tilt angle of the vibrating plate.

9. A precision seeder suitable for rice row seedling raising according to claim 1, characterized in that: The back plate is inclined from the upper outside to the lower inside; the back plate has four horizontal mounting holes for seed quantity monitoring sensors, which are located at the intersection of the three bisectors of the back plate, for mounting the four seed quantity monitoring sensors; the four seed quantity monitoring sensors are divided into two groups, upper and lower, and each group of seed quantity monitoring sensors includes two seed quantity monitoring sensors installed at the same height; the seed quantity monitoring sensors are diffuse reflection sensors.

10. A precision seeder suitable for rice row seedling raising according to claim 1, characterized in that: The vibrating plate consists of two hollow vibrating plates and one solid vibrating plate. The solid vibrating plate is located in the middle, and the hollow vibrating plates are located on the left and right sides of the solid vibrating plate. The solid vibrating plate and the hollow vibrating plate are connected to each other by an "L"-shaped structure. The vibration motor is installed in the center of the inner side of the solid vibrating plate.

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