Sweet potato seedling raising and seeding device

Abstract

The present application relates to the technical field of seeding equipment, in particular to a sweet potato seedling raising and seeding device, which comprises two chain wheels installed on a seeding machine and a chain connected to the two chain wheels for transmission, characterized in that the chain is uniformly provided with seeding mechanisms movable with the chain; the seeding mechanism comprises an annular sleeve, an annular air bag arranged in the annular sleeve, and a driving assembly connected to the annular air bag and used for controlling inflation or contraction of the annular air bag; the present application is provided with an auxiliary guide rail in the shape of "J"; when the seeding mechanism rotates to the lowest position with the chain, the regulating wheel is separated from the auxiliary guide rail, the return spring is stretched and pushes the concave bracket, the air in the annular air bag is sucked into the regulating sleeve through the regulating connecting rod and the piston, the annular air bag is contracted and the sweet potato seed block is released, since the release point is located at the lowest position and is extremely close to the ridging soil layer, the sweet potato seed block falls in a very short distance and will not be turned over due to gravity.

Description

Technical Field

[0001] This invention relates to the manufacture of mechanized agricultural and horticultural machinery, particularly to the field of sowing equipment technology, specifically a sweet potato seedling sowing device. Background Technology

[0002] Sweet potato seedling planting devices are specialized agricultural machines used to plant sweet potato seed tubers at fixed intervals into the raised soil layer. They can effectively improve the speed of sweet potato seedling planting. For example, a potato planter proposed in patent application number "CN202210269426.1" uses a sprocket and chain structure to drive the seed scoop to move, thereby realizing potato planting.

[0003] However, when planting sweet potatoes using a sprocket and chain structure to drive the seed spoon, the newly sprouted white buds of the sweet potato tubers sometimes face upwards and sometimes downwards, which is not conducive to the growth of the sweet potato tubers. Therefore, existing technologies, such as patent application number "CN201610572565.6", have proposed a cam-type planter for potato planters, which can replace the seed spoon to carry the sweet potato tubers. It places the newly sprouted white sweet potato tubers with their white buds facing upwards above the left and right cups. During planting, the separation of the left and right cups allows the white buds of the sweet potato tubers to face upwards after they fall, which is beneficial to the growth of the sweet potatoes.

[0004] However, in existing technologies, because the cam-type planter needs to move with the chain structure, it bends when it reaches the bottom of the chain. Therefore, the sweet potato seed tuber needs to be released before the cam-type planter reaches the bend position, making it impossible to release the sweet potato seed tuber at the lowest point (e.g., Figure 9 When sowing, the seed blocks fall a long distance, making them prone to flipping and causing misalignment of the exposed white area. Furthermore, the mechanical structure lacks flexible protection for the seed blocks, making them easily damaged. After sowing, the seed blocks fall directly onto the raised soil layer, resulting in unstable positioning on the raised soil layer. They are easily displaced or tilted by impacts during subsequent covering with soil, affecting the germination rate and growth quality. Summary of the Invention

[0005] The purpose of this invention is to provide a sweet potato seedling raising and planting device to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions: A sweet potato seedling sowing device includes two sprockets mounted on a planter and a chain connected to the two sprockets for transmission, characterized in that a sowing mechanism that can move with the chain is evenly mounted on the chain. The seeding mechanism includes an annular sleeve, an annular airbag disposed within the annular sleeve, and a drive assembly connected to the annular airbag and controlling its expansion or contraction. The sweet potato seedling sowing device also includes a guide rail assembly fixed on the sowing machine, which is located on the moving path of the sowing mechanism along the chain; The drive assembly is equipped with an adjustment wheel that cooperates with the guide rail assembly. When the planting mechanism moves with the chain, the adjustment wheel moves along the guide rail assembly and triggers the drive assembly to expand or contract the annular airbag at a preset position, thereby positioning the sweet potato seed block for transport and releasing the sweet potato seed block at the position closest to the ridged soil layer.

[0007] Preferably, the drive assembly includes a control sleeve fixedly connected to the annular sleeve, a movable piston is provided inside the control sleeve, a control link is fixedly connected to one side of the piston, the control link passes through the control sleeve and is fixedly connected to an inner concave bracket, and a control wheel is rotatably connected to the inner concave bracket; the control sleeve and the annular airbag are connected through an air passage.

[0008] Preferably, the air passage includes a control tube fixedly connected to the control sleeve, a diverter tube fixedly connected to the annular sleeve, and a connecting ball connecting the control tube and the diverter tube; one end of the diverter tube is fixedly connected to the annular airbag.

[0009] Preferably, the drive assembly further includes a return spring sleeved on the control linkage, one end of the return spring being fixedly connected to the control sleeve and the other end being fixedly connected to the concave bracket.

[0010] Preferably, guide rods are fixedly connected to both sides of the regulating sleeve, and guide sleeves are fixedly connected to both sides of the concave bracket, with the guide rods and guide sleeves slidably connected. The seeding mechanism also includes a mounting block installed on the chain, a first support rod fixedly connected between the mounting block and the annular sleeve, and a second support rod fixedly connected between the mounting block and the control sleeve.

[0011] Preferably, the guide rail assembly includes a "J"-shaped auxiliary guide rail and an arc-shaped guide plate, with a limiting plate fixedly connected between the top of the auxiliary guide rail and the arc-shaped guide plate.

[0012] Preferably, the thickness of the arc-shaped guide plate gradually decreases from top to bottom along its arc direction.

[0013] Preferably, the "J"-shaped auxiliary guide rail does not bend upward when it bends to its lowest point, so that the control wheel separates from the auxiliary guide rail at its lowest point.

[0014] Preferably, a main drive gear is fixedly connected to the center of one side of the lower sprocket; The sweet potato seedling planting device also includes a support frame, which is fixed on the external planter and is at the same height as the main drive gear. A power transmission mechanism is installed on the support frame. The power transmission mechanism includes a driving pulley and a driven pulley, which are connected by a transmission belt and are both rotatably connected to the support frame. One side of the driving pulley is fixedly connected to a mating gear that meshes with the main drive gear, and one side of the driven pulley is fixedly connected to a rotating shaft. One end of the rotating shaft is rotatably connected to a first connecting plate, one end of the first connecting plate is rotatably connected to a second connecting plate, one end of the second connecting plate is rotatably connected to a vertical pressure plate, and the bottom of the vertical pressure plate is fixedly connected to a horizontal pressure plate.

[0015] Preferably, a flexible protective pad is fixedly connected to the bottom of the transverse pressure plate; Two limiting tubes are fixedly connected to the support frame, and two vertical limiting shafts are fixedly connected to one side of the horizontal pressure plate. The vertical limiting shafts are slidably connected to the limiting tubes.

[0016] The beneficial effects of this invention are: I. This invention, by setting up a "J"-shaped auxiliary guide rail, when the sowing mechanism rotates to the lowest point with the chain, the regulating wheel separates from the auxiliary guide rail, the reset spring extends and pushes the concave bracket, and the regulating linkage drives the piston to draw air from the annular airbag into the regulating sleeve, causing the annular airbag to contract and release the sweet potato seed. Since the release point is located at the lowest point, very close to the ridging soil layer, the sweet potato seed falls within a very short distance and will not flip due to gravity, ensuring that the exposed white part of the seed is stably located at the top after release, significantly improving the uniformity of seedling emergence.

[0017] Second, this invention uses an annular airbag to position sweet potato seed tubers. Utilizing the flexibility and expandability of the airbag, it can adapt to sweet potato seed tubers of different shapes and flexibly wrap them, effectively avoiding mechanical damage to the seed tubers caused by rigid clamping. At the same time, combined with the mechanical cooperation of the "J"-shaped auxiliary guide rail and the arc-shaped guide plate, the automatic inflation (expansion positioning) and automatic deflation (release of seed tubers) of the annular airbag can be realized through purely mechanical structures such as adjustment wheels, return springs, and pistons. The entire process does not require additional electrical components and complex control systems, and the structure is ingenious and the operation is stable and reliable.

[0018] Third, this invention, by setting up a pressing component consisting of a main drive gear, a power transmission mechanism, and a vertical pressing plate, allows the horizontal pressing plate to move up and down once in the vertical direction after the sweet potato seed is released. The flexible protective pad gently presses down on the seed, slightly pressing the bottom of the sweet potato seed into the raised soil layer. This action allows the seed to be initially fixed in the soil layer. When covering the seed with soil later, the impact force of the soil will not cause the sweet potato seed to shift or tilt, ensuring accurate covering of the sweet potato seed and creating favorable conditions for the stable growth of the sweet potato seed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 Structural diagram of the middle support frame section; Figure 3 This is the present invention. Figure 2 A structural schematic diagram of the rear view of the central support frame; Figure 4 This is the present invention. Figure 1 Schematic diagram of the auxiliary guide rail section; Figure 5 This is the present invention. Figure 4 Schematic diagram of the connection between the seeding mechanism and the auxiliary guide rail; Figure 6 This is the present invention. Figure 5 A schematic diagram of the structure of the seeding mechanism; Figure 7 This is the present invention. Figure 6 Side view of the seeding mechanism; Figure 8 This is the present invention. Figure 7 A cross-sectional view of the central control sleeve from the front view; Figure 9 This is a schematic diagram of sweet potato seed planting in existing technology.

[0020] The attached figures are labeled as follows: 1. Sprocket; 2. Chain; 301. Mounting block; 302. Annular sleeve; 303. Annular airbag; 304. Adjusting sleeve; 3041. Adjusting tube; 3042. Connecting ball; 3043. Diverter tube; 305. Piston; 306. Adjusting linkage; 307. Concave bracket; 308. Adjusting wheel; 309. Guide rod; 310. Guide sleeve; 311. Return spring; 312. First support rod; 313. Second support rod 4. Auxiliary guide rail; 5. Arc-shaped guide plate; 6. Limiting plate; 7. Support frame; 801. Drive pulley; 802. Driven pulley; 8021. Transmission belt; 803. Matching gear; 804. Rotating shaft; 805. First connecting plate; 806. Second connecting plate; 807. Vertical pressure plate; 808. Horizontal pressure plate; 809. Flexible protective pad; 810. Limiting tube; 811. Vertical limiting shaft; 9. Main drive gear. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 A sweet potato seedling sowing device includes two sprockets 1 mounted on a planter and a chain 2 connected to the two sprockets 1 for transmission. One of the sprockets 1 is driven by an external mechanism. The planter, sprockets 1 and chain 2 are all existing technologies and will not be described in detail here.

[0023] like Figures 4-8 Multiple sowing mechanisms that can move with the chain 2 are evenly installed on the chain 2. The sowing mechanism includes a mounting block 301 installed on the chain 2. A ring sleeve 302 is provided on one side of the mounting block 301. Two ring airbags 303 are installed inside the ring sleeve 302. The center of the ring airbag 303 is open, so that the sweet potato seed can pass through the central opening of the ring airbag 303. The expansion of the ring airbag 303 can clamp and position the sweet potato seed.

[0024] A regulating sleeve 304 is provided on one side of the annular sleeve 302. The regulating sleeve 304, piston 305, regulating connecting rod 306, concave bracket 307, regulating wheel 308 and return spring 311 together constitute a drive assembly for controlling the expansion or contraction of the annular airbag 303. As part of the drive assembly, a regulating tube 3041 is fixedly connected to one end of the regulating sleeve 304 near the annular sleeve 302. Two diverter tubes 3043 are fixedly connected to the annular sleeve 302. One end of the diverter tube 3043 is located inside the annular sleeve 302 and is fixedly connected to the annular airbag 303. The other end is fixedly connected to the regulating tube 3041 through a connecting ball 3042. The regulating tube 3041, the connecting ball 3042 and the diverter tube 3043 together constitute an air passage connecting the drive assembly and the annular airbag 303. A horizontally movable piston 305 is provided inside the regulating sleeve 304. One end of the piston 305 is fixedly connected to a regulating rod 306. One end of the regulating rod 306 passes through the regulating sleeve 304 and is fixedly connected to a concave bracket 307. A regulating wheel 308 is rotatably connected to the concave bracket 307. Guide rods 309 are fixedly connected to both sides of the regulating sleeve 304, and guide sleeves 310 are fixedly connected to both sides of the concave bracket 307. The guide rods 309 and guide sleeves 310 are slidably connected, which can not only assist the concave bracket 307 and the regulating wheel 308 in bearing force, but also ensure the horizontal movement of the concave bracket 307 and the regulating wheel 308. A return spring 311 is fixedly connected between the regulating sleeve 304 and the concave bracket 307. The return spring 311 is sleeved on the outer surface of the regulating link 306. When the regulating wheel 308 is pressed against the auxiliary guide rail 4, the return spring 311 is in a compressed state.

[0025] A first support rod 312 is fixedly connected between the mounting block 301 and the annular sleeve 302, and a second support rod 313 is fixedly connected between the mounting block 301 and the regulating sleeve 304, which can provide fixation and support for the annular sleeve 302 and the regulating sleeve 304 respectively.

[0026] like Figure 4 and Figure 5 The sweet potato seedling sowing device also includes a guide rail assembly, which includes an auxiliary guide rail 4, an arc-shaped guide plate 5, and a limiting plate 6. The limiting plate 6 is fixedly connected between the top of the auxiliary guide rail 4 and the arc-shaped guide plate 5. The auxiliary guide rail 4, the arc-shaped guide plate 5, and the limiting plate 6 are all fixed on the external sowing machine and are all located in the direction of movement of the sowing mechanism along the chain 2.

[0027] The auxiliary guide rail 4 is designed in a "J" shape. When the "J" shaped auxiliary guide rail 4 bends to a short distance at its lowest point (designed according to the size of the control wheel), it stops bending upwards. This allows the control wheel 308 to separate from the "J" shaped auxiliary guide rail 4 at its lowest point. The space inside the auxiliary guide rail 4 is greater than the thickness of the control wheel 308, allowing the control wheel 308 to change its angle as it moves along the auxiliary guide rail 4.

[0028] The thickness of the arc-shaped guide plate 5 gradually decreases from top to bottom along its arc direction, so that when the seeding mechanism moves with the chain 2, the regulating wheel 308 can first contact the surface of the highest point of the arc-shaped guide plate 5 and move along the surface of the arc-shaped guide plate 5. During this process, the arc-shaped guide plate 5 will gradually squeeze the regulating wheel 308, causing the regulating wheel 308 to squeeze the concave bracket 307 and move towards the regulating sleeve 304.

[0029] like Figure 1 , Figure 2 and Figure 3 The main drive gear 9 is fixedly connected to the center of one side of the lower sprocket 1; The sweet potato seedling planting device also includes a support frame 7, which is fixed on the external planter and is at the same height as the main drive gear 9. The support frame 7 is equipped with a power transmission mechanism, which includes a drive pulley 801 and a driven pulley 802. The drive pulley 801 and the driven pulley 802 are connected by a transmission belt 8021. Both the drive pulley 801 and the driven pulley 802 are rotatably connected to the support frame 7. A matching gear 803 is fixedly connected to one side of the drive pulley 801. The drive pulley 801 and the driven pulley 802 are the same size and can rotate synchronously. A rotating shaft 804 is fixedly connected to one side of the driven pulley 802. A first connecting plate 805 is fixedly connected to one end of the rotating shaft 804. A second connecting plate 806 is rotatably connected to one end of the first connecting plate 805. A vertical pressure plate 807 is rotatably connected to one end of the second connecting plate 806. A horizontal pressure plate 808 is fixedly connected to the bottom of the vertical pressure plate 807. A flexible protective pad 809 is fixedly connected to the bottom of the horizontal pressure plate 808. Two limiting tubes 810 are fixedly connected to the support frame 7, and two vertical limiting shafts 811 are fixedly connected to one side of the horizontal pressure plate 808. The vertical limiting shafts 811 and the limiting tubes 810 are slidably connected, which can ensure that the vertical pressure plate 807 and the horizontal pressure plate 808 can only move up and down in the vertical direction.

[0030] The meshing gear 803 and the main drive gear 9 are matched. The gear ratio of the meshing gear 803 and the main drive gear 9 is the same as the number of planting mechanisms above the chain 2. This ensures that after planting one sweet potato seed, the main drive gear 9 rotates one revolution, and the driving pulley 801 and the driven pulley 802 also rotate one revolution synchronously. The vertical pressure plate 807 completes one up-and-down movement.

[0031] The working principle of the sweet potato seedling raising and sowing device provided by this invention is as follows: With the white side of the sweet potato seed tuber facing the planting mechanism, the sweet potato seed tuber is then passed through the opening area in the middle of the annular air bladder 303. The expansion of the annular air bladder 303 positions the sweet potato seed tuber, and it can move downward along the auxiliary guide rail 4 together with the annular air bladder 303 and the annular sleeve 302. During this process, the control wheel 308 is pressed against the auxiliary guide rail 4, and the reset spring 311 is in a contracted state. When the sweet potato seed tuber rotates to its lowest point (closest to the ridging soil layer) along with the planting mechanism and chain 2, the annular airbag 303 and annular sleeve 302 change to a horizontal state. The sweet potato seed tuber, which originally passed horizontally through the annular airbag 303, becomes vertical, with the exposed white side facing upwards. The regulating wheel 308 separates from the "J"-shaped auxiliary guide rail 4, and the reset spring 311 extends, pushing the concave support 307 and the regulating wheel 308. The concave support 307 moves away from the regulating sleeve 304 and drives the piston 305 to move together through the regulating linkage 306. When the piston 305 moves, it draws air from the annular airbag 303 into the regulating sleeve 304 through the regulating pipe 3041, connecting ball 3042 and diverting pipe 3043. The annular airbag 303 contracts, and the sweet potato seed tuber it positions falls into the ridging soil layer below, with the exposed white part facing upwards. After the sweet potato seed tubers are released, the planting mechanism continues to move along chain 2. When the planting mechanism moves to the position of the upper arc-shaped guide plate 5, the regulating wheel 308 moves first and abuts against the side of the thinner end of the arc-shaped guide plate 5. As the chain 2 drives the planting mechanism to continue moving, the regulating wheel 308 is continuously resisted by the increasing thickness of the arc-shaped guide plate 5. The inner concave bracket 307 compresses the return spring 311, causing the return spring 311 to contract. The inner concave bracket 307 then moves towards the regulating sleeve 304. The support 307 drives the piston 305 to move together via the regulating linkage 306. When the piston 305 moves, it pushes the air inside the regulating sleeve 304 into the annular airbag 303 through the regulating pipe 3041, the connecting ball 3042 and the diverting pipe 3043, causing the annular airbag 303 to expand. The regulating wheel 308 turns from the arc-shaped guide plate 5 to the vertical position through the limiting plate 6 and continues to move downward along the auxiliary guide rail 4 to start the next working cycle. During this process, the operator can put new sweet potato seed pieces into the expanded annular airbag 303.

[0032] Meanwhile, the sprocket 1 located below drives the main drive gear 9 to rotate. Since the cooperating gear 803 meshes with the main drive gear 9, the power is transmitted to the driven pulley 802 through the driving pulley 801 and the transmission belt 8021, causing it to rotate synchronously. The driven pulley 802 drives the crank-connecting rod mechanism composed of the first connecting plate 805 and the second connecting plate 806 through the rotating shaft 804, which drives the vertical pressure plate 807 and the horizontal pressure plate 808 to move up and down reciprocally under the guidance of the limiting tube 810 and the vertical limiting shaft 811. When the planting mechanism releases the sweet potato seed, the horizontal pressure plate 808 moves downward and gently presses down the sweet potato seed that has fallen on the soil layer through the flexible protective pad 809, so that its bottom is slightly pressed into the soil. Then the horizontal pressure plate 808 returns to its original position and waits for the next working cycle.

[0033] Compared with related technologies, the sweet potato seedling raising and sowing device provided by the present invention has the following beneficial effects: This invention utilizes a "J"-shaped auxiliary guide rail 4. When the sowing mechanism rotates to its lowest point with the chain 2, the regulating wheel 308 separates from the auxiliary guide rail 4. The reset spring 311 extends and pushes the concave support 307. Through the regulating linkage 306, the piston 305 draws air from the annular airbag 303 into the regulating sleeve 304, causing the annular airbag 303 to contract and release the sweet potato seed. Since the release point is located at the lowest point, very close to the ridging soil layer, the sweet potato seed falls within a very short distance and will not flip due to gravity. This ensures that the exposed white part of the seed is stably positioned at the top after release, significantly improving the uniformity of seedling emergence.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A sweet potato seedling sowing device, comprising two sprockets (1) mounted on a planter, and a chain (2) connected to the two sprockets (1) for transmission, characterized in that, The chain (2) is evenly equipped with a seeding mechanism that can move with the chain (2); The seeding mechanism includes an annular sleeve (302), an annular airbag (303) disposed in the annular sleeve (302), and a drive assembly connected to the annular airbag (303) and controlling its expansion or contraction. The sweet potato seedling sowing device also includes a guide rail assembly fixed on the sowing machine, the guide rail assembly being located on the movement path of the sowing mechanism along the chain (2); The drive assembly is equipped with a control wheel (308) that cooperates with the guide rail assembly. When the sowing mechanism moves with the chain (2), the control wheel (308) moves along the guide rail assembly and triggers the drive assembly to expand or contract the annular airbag (303) at a preset position, thereby positioning the sweet potato seed block for transport and releasing the sweet potato seed block at the position closest to the ridge soil layer.

2. A sweet potato seedling raising and sowing device according to claim 1, characterized in that, The drive assembly includes a control sleeve (304) fixedly connected to the annular sleeve (302). A movable piston (305) is provided inside the control sleeve (304). A control link (306) is fixedly connected to one side of the piston (305). The control link (306) passes through the control sleeve (304) and is fixedly connected to a concave bracket (307). A control wheel (308) is rotatably connected to the concave bracket (307). The control sleeve (304) and the annular airbag (303) are connected through an air passage.

3. A sweet potato seedling raising and sowing device according to claim 2, characterized in that, The air passage includes a control tube (3041) fixedly connected to the control sleeve (304), a diverter tube (3043) fixedly connected to the annular sleeve (302), and a connecting ball (3042) connecting the control tube (3041) and the diverter tube (3043); one end of the diverter tube (3043) is fixedly connected to the annular airbag (303).

4. A sweet potato seedling raising and planting device according to claim 3, characterized in that, The drive assembly also includes a reset spring (311) sleeved on the control link (306), one end of the reset spring (311) being fixedly connected to the control sleeve (304), and the other end being fixedly connected to the concave bracket (307).

5. A sweet potato seedling raising and planting device according to claim 3, characterized in that, Guide rods (309) are fixedly connected to both sides of the regulating sleeve (304), and guide sleeves (310) are fixedly connected to both sides of the concave bracket (307). The guide rods (309) and guide sleeves (310) are slidably connected. The seeding mechanism also includes a mounting block (301) mounted on the chain (2), a first support rod (312) fixedly connected between the mounting block (301) and the annular sleeve (302), and a second support rod (313) fixedly connected between the mounting block (301) and the regulating sleeve (304).

6. A sweet potato seedling raising and sowing device according to claim 1, characterized in that, The guide rail assembly includes a "J"-shaped auxiliary guide rail (4) and an arc-shaped guide plate (5), with a limiting plate (6) fixedly connected between the top of the auxiliary guide rail (4) and the arc-shaped guide plate (5).

7. A sweet potato seedling raising and sowing device according to claim 6, characterized in that, The thickness of the arc-shaped guide plate (5) gradually decreases from top to bottom along its arc direction.

8. A sweet potato seedling raising and sowing device according to claim 6, characterized in that, When the "J"-shaped auxiliary guide rail (4) bends to its lowest point, it no longer bends upward, causing the control wheel (308) to separate from the auxiliary guide rail (4) at its lowest point.

9. A sweet potato seedling raising and planting device according to claim 1, characterized in that, A main drive gear (9) is fixedly connected to the center of one side of the sprocket (1) located below. The sweet potato seedling sowing device also includes a support frame (7), which is fixed on the external sowing machine and is at the same height as the main drive gear (9). A power transmission mechanism is provided on the support frame (7). The power transmission mechanism includes a driving pulley (801) and a driven pulley (802), which are connected by a transmission belt (8021) and are rotatably connected to the support frame (7). One side of the driving pulley (801) is fixedly connected to a mating gear (803) that meshes with the main drive gear (9). One side of the driven pulley (802) is fixedly connected to a rotating shaft (804). One end of the rotating shaft (804) is fixedly connected to a first connecting plate (805). One end of the first connecting plate (805) is rotatably connected to a second connecting plate (806). One end of the second connecting plate (806) is rotatably connected to a vertical pressure plate (807). The bottom of the vertical pressure plate (807) is fixedly connected to a horizontal pressure plate (808).

10. A sweet potato seedling raising and planting device according to claim 9, characterized in that, A flexible protective pad (809) is fixedly connected to the bottom of the transverse pressure plate (808). Two limiting tubes (810) are fixedly connected to the support frame (7), and two vertical limiting shafts (811) are fixedly connected to one side of the horizontal pressure plate (808). The vertical limiting shafts (811) are slidably connected to the limiting tubes (810).

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