A disk clamp type sweet potato transplanter and transplanting method

Abstract

The present invention relates to a disc clip type sweet potato transplanter and a transplanting method. The disc clip type sweet potato transplanter includes a frame equipped with ground wheels, a ridging device, a rotary tillage device, a rice transplanting device and a seedling feeding device. The rice transplanting device includes a support shaft, a turntable, seedling clips and a circular pressing plate. The seedling clips fixed on the disc make a rotary motion, and are opened and closed under the combined action of the circular pressing plate and the extrusion break. When the seedling clips rotate to the bottom end of the seedling feeding device, they clamp the sweet potato seedlings, and the sweet potato seedlings are planted in the middle of the ridge as the seedling clips rotate. The present invention can achieve double-row staggered transplanting of sweet potatoes in large ridges, and can complete processes such as rotary tillage, ridging and rice transplanting in one operation, improving the sweet potato planting efficiency and realizing dense planting of sweet potatoes.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, especially to the field of transplanting equipment for sweet potato seedlings, and specifically refers to a disk clamp type sweet potato transplanter and a transplanting method. Background Art

[0002] Sweet potatoes are rich in nutrients and have a wide range of uses. The planting area and total output of sweet potatoes in China rank first in the world. At present, the main methods for planting sweet potato seedlings include direct planting method, oblique planting method, horizontal planting method, etc. Among them, the oblique planting method and the horizontal planting method best meet the agronomic requirements for sweet potato planting.

[0003] However, at present, there are few related transplanting machines for sweet potato seedlings that can achieve planting. To achieve the planting of sweet potato seedlings, it still mainly relies on manual labor, with a large labor intensity, which seriously restricts the development of the sweet potato industry. For example, the patent with the application number 2021228839253 discloses a sweet potato transplanter, which adopts the method of first digging a hole, then the sweet potato seedlings fall into the hole automatically, and finally covering the soil, resulting in a more cumbersome process for transplanting sweet potato seedlings, and it cannot achieve the planting effect. Moreover, the process of transplanting sweet potato seedlings cannot be integrated with soil treatment, which is not conducive to improving the overall planting efficiency of sweet potato seedlings. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a disk clamp type sweet potato transplanter and a transplanting method, which not only achieve the planting of sweet potato seedlings, but also realize the integrated operation of sweet potato seedling planting, soil rotary tillage, and ridging.

[0005] The present invention is realized through the following technical solutions. A disk clamp type sweet potato transplanter is provided, which includes a frame equipped with ground wheels. A rotary tillage device, a ridging device, a transplanting device, and a seedling feeding device are successively installed on the frame from front to back. The clamping point of the transplanting device is adapted to the seedling picking point of the seedling feeding device, and the seedling dropping point of the transplanting device is adapted to the ridge formed by the ridging device. The transplanting device includes a turntable rotatably arranged on the frame and a transplanting driving mechanism for driving the turntable to rotate. A plurality of seedling clamps are installed on the turntable and arranged circumferentially in sequence. The moving trajectory of the clamping end of the seedling clamp passes through the clamping point. The seedling clamp includes a first clamp body and a second clamp body arranged oppositely, and the first clamp body is located between the second clamp body and the turntable. The first clamp body and the second clamp body are connected by a spring. The proximal end of the first clamp body is fixedly connected to the turntable. The distal ends of the first clamp body and the second clamp body form the clamping end of the seedling clamp. A cross bar parallel to the axis of the turntable is fixedly arranged on the turntable. The second clamp body is rotatably connected to the cross bar through a fixing pin, and the fixing pin is located between the proximal end of the second clamp body and the spring. A circular pressing plate adapted to the proximal end of the second clamp body is fixedly arranged on the frame. An extrusion break is provided on the circular pressing plate, and the extrusion break corresponds to the trajectory of the seedling clamp from the clamping point to the seedling dropping point.

[0006] When the present invention is in use, the frame is driven forward by the traction device, the land is reclaimed and loosened by the rotary tillage device, and the ridging operation is facilitated at the same time. The loosened soil is ridged and shaped by the ridging device to ensure the accuracy of the seedling placement of the seedling delivery device, and at the same time facilitate the subsequent irrigation, harvesting and other operations. The potato seedlings are delivered to the seedling collection point by the seedling delivery device, and the potato seedlings are inserted into the shaped field ridges by the seedling clamps of the transplanting device, thereby realizing the mechanized planting of potato seedlings. When the seedling clamp moves close to the seedling clamping point, the proximal end of the second clamp is squeezed by the circular squeezing plate, and the principle of the lever is used to make the second clamp The distal end is away from the distal end of the first clamp, the seedling clamping end of the seedling clamp is in an open state, and the spring is compressed; when the seedling clamp moves to the seedling clamping point, the proximal end of the second clamp is located at the extrusion fracture, and the extrusion effect of the circular extrusion plate is lost. Under the rebound effect of the spring, the distal end of the second clamp moves toward the distal end of the first clamp, and the seedling clamp closes and clamps the roots of the sweet potato seedlings at the seedling taking point of the seedling delivery device. When the seedling clamp rotates with the turntable to the seedling dropping point, the sweet potato seedlings are inserted into the field ridges. At the same time, the proximal end of the second clamp leaves the extrusion fracture and continues to be squeezed by the circular extrusion plate, so that the seedling clamp opens to prevent the seedling clamp from bringing the sweet potato seedlings out of the field ridges.

[0007] As an optimization, the frame is fixed with two support shafts located on the left and right sides of the turntable respectively, and the center of the turntable is fixed with a hollow shaft that is sleeved on the support shaft and rotatably connected to the support shaft. The two support shafts are coaxially arranged with the turntable and the hollow shaft; the support shaft is fixed with a cover plate, and the cover plate includes a support plate fixed to the support shaft, a top plate extending from the upper end of the support plate toward the side where the turntable is located, and a side plate extending downward from the top plate away from one end of the support plate, the side plate forms the circular extrusion plate, and the circular extrusion plate is provided with a through hole for the hollow shaft to pass through. This solution ensures the rotation of the turntable and fixes the circular extrusion plate by arranging the support shaft and the hollow shaft. The structure is simple, and the hollow shaft in the cover plate is convenient for arranging a sprocket for receiving power.

[0008] As an optimization, seedling clips are provided on both sides of the turntable, and the seedling clips on the left and right sides are staggered along the circumferential direction, and the frame is provided with seedling delivery devices corresponding to the seedling clips on the left and right sides. The setting of this optimization scheme realizes the planting of double-row sweet potato seedlings and improves the working efficiency.

[0009] As an optimization, a gearbox is installed on the frame, the first output shaft of the gearbox is connected to the rotary tillage device and the rice transplanting device, and the second output shaft of the gearbox is connected to the seedling delivery device. This optimization scheme greatly simplifies the machine structure by providing a gearbox with two output shafts, so that the power of the rotary tillage device, the rice transplanting device and the seedling delivery device is transmitted through the gearbox.

[0010] As an optimization, the seedling feeding device includes a seedling feeding frame fixed on the frame, a conveying chain rotatably arranged on the seedling feeding frame, and a seedling feeding driving mechanism for driving the conveying chain to rotate. The conveying chain includes a transverse conveying section, a vertical conveying section, and a transition section arranged in sequence along the circumferential direction. A seedling placing tray is arranged on the conveying chain, and the lower end of the vertical conveying section forms a seedling picking point. In this optimization solution, sweet potato seedlings are placed on the seedling placing tray, and the rotating conveying chain drives the seedling placing tray to move, thereby realizing the conveying of sweet potato seedlings. By setting the transverse conveying section, it is convenient for the operation of placing sweet potato seedlings. The vertical conveying section is used to convey the sweet potato seedlings downward to the seedling picking point, which is convenient for ensuring the continuity of conveying.

[0011] As an optimization, the conveying chain includes two mutually parallel seedling feeding chains; the seedling placing tray includes a placing plate and retaining bars fixed on both sides of the placing plate. The two ends of the placing plate are respectively fixed to the two seedling feeding chains of the conveying chain, and the retaining bars and the placing plate form a sweet potato seedling placing space. In this optimization solution, by setting two seedling feeding chains, the stability of conveying is improved. The seedling placing tray adopts the structure of a placing plate and retaining bars, with low manufacturing cost, and the retaining bars are arranged to prevent sweet potato seedlings from slipping off the placing plate.

[0012] As an optimization, a retaining strip extending vertically and corresponding to the height of the vertical conveying section is also fixed on the seedling feeding frame. The retaining strip is located outside the conveying chain, and the distance between the retaining strip and the placing plate located in the vertical conveying section is less than or equal to the height of the retaining bar. In this optimization solution, by setting a retaining strip corresponding to the vertical conveying section, sweet potato seedlings are prevented from falling off the seedling placing tray when moving downward.

[0013] This solution also provides a transplanting method using the above-mentioned disk clamp type sweet potato transplanter, including the following steps:

[0014] 1. Place the seedling tray with sweet potato seedlings on the sweet potato seedling placing groove. Drive the transplanter to move in the field by a tractor. During the forward movement of the transplanter, the land is reclaimed and loosened by the rotary tillage device, and the loosened soil is ridged and shaped by the ridging device;

[0015] 2. Workers place the sweet potato seedlings on the seedling tray flat on the seedling placing tray of the transverse conveying section of the seedling feeding device, and make the roots of the sweet potato seedlings face the side where the sweet potato seedling transplanting position is located. The sweet potato seedlings are conveyed to the vertical conveying section by the rotation of the seedling feeding chain, and the vertical conveying section conveys the sweet potato seedlings to the seedling picking point at the bottom of the chain;

[0016] 3. During the rotary motion of the turntable, when the seedling clip on the turntable rotates to the seedling picking point, the clamping end of the seedling clip closes under the action of the spring. The seedling clip clamps the root of the sweet potato seedling, and as the whole machine moves forward and the turntable rotates, the root of the sweet potato seedling is inserted into the soil. Then, the seedling clip opens under the action of the circular pressing plate. When the seedling clip moves from the seedling planting point to the seedling picking point, the second clip body contacts the circular pressing plate. By using the obstructive effect of the circular pressing plate, the distal end of the second clip body rotates outward around the fixed pin, and the clamping end is in an open state. When the second clip body moves to the position corresponding to the extrusion break, it loses the obstructive effect of the circular pressing plate, and the clamping end gradually closes under the action of the spring. When the seedling clip moves to the seedling clamping point, it clamps the root of the sweet potato seedling.

[0017] 4. During the process of the previous seedling clip sending the sweet potato seedling to the seedling planting point, the seedling feeding chain rotates, moving the next sweet potato seedling to the position corresponding to the next seedling clip.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The turntable drives each seedling clip to pick and insert seedlings, which is convenient for ensuring the spacing after planting sweet potato seedlings. Through the setting of the circular pressing plate and the extrusion break, the seedling clip is in a closed state during seedling picking and planting to ensure the reliability of seedling picking and insertion. During the movement from the seedling planting point to the seedling picking point after insertion, the seedling clip is in an open state to facilitate clamping of sweet potato seedlings.

[0020] 2. Seedling clips are respectively arranged on both sides of the turntable, realizing the transplanting of two rows of sweet potato seedlings, improving the operation efficiency, and enabling the close planting of sweet potatoes.

[0021] 3. The seedling transplanting device uses a sprocket chain to transport sweet potato seedlings, with a simple structure, which can further reduce the cost of the sweet potato transplanter. Description of the Drawings

[0022] Figure 1 is the front view schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is the left view schematic diagram of the overall structure of the present invention;

[0024] Figure 3 is the top view schematic diagram of the overall structure of the present invention;

[0025] Figure 4 is the isometric schematic diagram of the overall structure of the present invention;

[0026] Figure 5 is the left view schematic diagram of the seedling transplanting device of the present invention;

[0027] Figure 6 is the combined drawing of the seedling feeding device and the seedling transplanting device of the present invention;

[0028] Figure 7It is a schematic diagram of the seedling clip structure;

[0029] As shown in the figure:

[0030] 1. Frame, 2. Rotary tillage shaft, 3. Rotary tillage blade, 4. Spring, 5. Rotary tillage pulley, 6. Belt, 7. First clip body, 8. Second clip body, 9. Cover plate, 10. Turntable, 11. Support shaft, 12. Driven sprocket Ⅰ, 13. Driven shaft Ⅱ, 14. Bevel gear Ⅰ, 15. Bevel gear Ⅱ, 16. Sprocket, 17. Seedling placing tray, 18. Stop bar, 19. Sweet potato seedling placing groove, 20. Driven sprocket Ⅱ, 21. Gearbox, 22. Suspension bracket, 23. Ridging device, 24. Ground wheel, 25. Seat, 26. Chain Ⅰ, 27. Chain Ⅱ, 28. Seedling feeding chain, 29. Driving sprocket Ⅱ, 30. Driving sprocket Ⅰ, 31. Pulley Ⅱ, 32. Extrusion break, 33. Cross bar, 34. Circular extrusion plate, 35. Circular plate. Specific implementation manner

[0031] To clearly illustrate the technical features of this solution, the following is an elaboration of this solution through specific implementation manners.

[0032] As Figure 1 shown, a disc clip type sweet potato transplanter includes a frame 1 equipped with a ground wheel 24. On the frame, a rotary tillage device, a ridging device 23, a transplanting device, and a seedling feeding device are successively installed from front to back. The seedling clamping point of the transplanting device is adapted to the seedling picking point of the seedling feeding device, and the seedling dropping point of the transplanting device is adapted to the ridge formed by the ridging device. The frame 1 is used to fix and support other parts. A suspension bracket 22 is provided at the front end of the frame and is hung on a walking farm implement such as a tractor through the suspension bracket 22. The suspension bracket is installed above the rotary tillage device. A seat 25 and a gearbox 21 are also provided on the frame. The power of the gearbox is divided into three paths. One path provides power to the rotary tillage device through belt drive, one path provides power to the transplanting device through sprocket and chain drive, and one path provides power to the seedling feeding device through sprocket, chain, and bevel gear drive. The seat is installed on the front and rear sides of the seedling feeding device. That is, a gearbox 21 is installed on the frame. The first output shaft of the gearbox is connected to the rotary tillage device through a belt 6. The first output shaft of the gearbox is connected to the transplanting device through a chain Ⅰ 26. A driving sprocket Ⅱ 29 adapted to the chain Ⅰ 26 and a pulley Ⅱ 31 adapted to the belt 6 are installed on the first output shaft of the gearbox. The second output shaft of the gearbox is connected to the seedling feeding device through a chain Ⅱ 27. A driving sprocket Ⅰ 30 adapted to the chain Ⅱ 27 is installed on the third output shaft.

[0033] The rotary tillage device includes a rotary tillage shaft 2 and rotary tillage blades 3 installed on the rotary tillage shaft. One end of the rotary tillage shaft is installed with a rotary tillage pulley 5. The rotary tillage pulley 5 is driven by a belt 6 to be connected with the main pulley 31 on the output shaft of the gearbox. The belt drive drives the rotary tillage shaft 2 and the rotary tillage blades 3 to rotate for land reclamation and loosening.

[0034] The ridging device 23 is installed behind the rotary tillage device to ridge and shape the loosened soil, ensuring the accurate placement position of the seedling feeding device. The structure of the ridging device adopts the existing technology.

[0035] As Figure 2 and Figure 5 shown, the rice transplanting device is installed behind the ridging device 23 and on the frame 1. The rice transplanting device in this embodiment includes a turntable 10 rotatably arranged on the frame and a rice transplanting driving mechanism for driving the turntable to rotate. The turntable is circular, and a number of seedling clips are installed on the turntable at equal intervals along the circumference. The moving trajectory of the seedling clamping end of the seedling clip passes through the seedling clamping point. When the seedling clamping end of the seedling clip moves to the seedling clamping point, the sweet potato seedling just moves to the seedling taking point of the seedling feeding device, and the seedling clip clamps the sweet potato seedling at the seedling taking point to complete the seedling taking.

[0036] The seedling clip includes a first clip body 7 and a second clip body 8 arranged oppositely. Both the first clip body and the second clip body are plate structures and extend along the radial direction of the turntable. The first clip body 7 is located between the second clip body 8 and the turntable 10. The first clip body and the second clip body are connected by a spring 4, and the spring is located between the proximal end and the distal end of the second clip body. The two ends of the spring are respectively connected to the first clip body and the second clip body. The proximal end of the first clip body is fixedly connected to the turntable, and the distal ends of the first clip body and the second clip body form the seedling clamping end of the seedling clip. A number of cross bars 33 parallel to the axis of the turntable are fixedly arranged on the turntable, and the cross bars are evenly distributed along the circumference. A seedling clip is installed on each cross bar. The second clip body is rotatably connected to the cross bar through a fixing pin, and the fixing pin is located between the proximal end of the second clip body and the spring. The fixing pin forms the lever fulcrum for the rotation of the second clip body.

[0037] A circular pressing plate 34 adapted to the proximal end of the second clip body is fixedly arranged on the frame. The circular pressing plate is provided with a pressing break 32, and the pressing break corresponds to the trajectory of the seedling clip rotating from the seedling clamping point to the seedling dropping point. When the proximal end of the second clip body moves to the corresponding interval of the pressing break, it is not affected by the circular pressing plate. The first clip body 7 is relatively fixed to the turntable, and the second clip body 8 moves under the action of the circular pressing plate 34 and the spring 4. The second clip body 8 rotates as the turntable 10 rotates. When the second clip body 8 moves to a position blocked by the pressing plate, the seedling clamping part at the distal end of the second clip body rotates away from the first clip body, and the whole seedling clip presents an open state; when the second clip body 8 moves to a place not blocked by the pressing plate, the seedling clamping part at the distal end of the second clip body rotates towards the direction close to the first clip body 7, and the whole seedling clip presents a closed state, realizing the clamping of the sweet potato seedlings.

[0038] In order to reduce the frictional force when the circular extrusion plate extrudes the second clamp body, a connecting rod extending radially is fixedly provided at the proximal end of the second clamp body in this embodiment. A circular plate 35 tangent to the circular extrusion plate is rotatably installed at one end of the connecting rod away from the second clamp body, and the circular plate 35 is coaxial with the connecting rod. At the same time, by guiding with the arc surface of the circular plate, the reliability of the second clamp body moving from the corresponding position of the extrusion fracture to the corresponding position of the circular extrusion plate is ensured. In this embodiment, the ends of the first clamp body and the second clamp body close to the center of the turntable are the proximal ends, and the ends away from the center of the turntable are the distal ends.

[0039] Two support shafts 11 are fixedly provided on the frame and are respectively located on the left and right sides of the turntable. A hollow shaft sleeved on the support shaft 11 and rotatably connected to the support shaft is fixedly provided at the center of the turntable. The two support shafts are coaxially arranged with the turntable and the hollow shaft. A cover plate 9 is fixedly provided on the support shaft. The cover plate 9 includes a support plate fixedly connected to the support shaft, a top plate extending from the upper end of the support plate toward the side where the turntable is located, and a side plate extending downward from one end of the top plate away from the support plate. The side plate forms the circular extrusion plate 34. A through hole for the hollow shaft to pass through is provided on the circular extrusion plate. A driven sprocket I 12 located inside the cover plate is installed on the hollow shaft to receive the power for driving the hollow shaft and the turntable to rotate. The cover plate 9 is fixedly installed on the support shaft 11, and the support shaft 11 plays a role in supporting the transplanting device.

[0040] In order to achieve the large-ridge double-row staggered transplanting of sweet potato seedlings and improve the utilization rate of the soil, seedling clamps are provided on both the left and right sides of the turntable, and the seedling clamps on the left and right sides are arranged in a circumferential staggered manner. The frame is provided with seedling feeding devices corresponding to the seedling clamps on the left and right sides respectively. Transverse rods parallel to the axis of the turntable are fixedly provided on the left and right sides of the turntable respectively. The transverse rods on both sides are distributed along the circumferential direction respectively. The proximal end of the first clamp body is fixedly connected to the turntable through the transverse rod, that is, the proximal end of the first clamp body is fixedly connected to the transverse rod and is completely constrained on the turntable. During operation, the turntable rotates counterclockwise, driving each seedling clamp to rotate. When the seedling clamp rotates to the bottom end of the chain of the seedling feeding device, the blocking effect of the circular extrusion plate disappears. At the same time, under the constraint of the spring, the second clamp body rotates toward the direction of the completely constrained first clamp body to clamp the sweet potato seedlings. As the turntable continues to rotate, the sweet potato seedlings are planted in the ridges built by the ridging device. The blocking effect of the circular extrusion plate appears, and the second clamp body rotates away from the first clamp body to release the sweet potato seedlings, completing a sweet potato seedling transplanting operation. During the process of the seedling clamp group sending the sweet potato seedlings to the seedling planting point, the seedling feeding chain rotates simultaneously, moving the sweet potato seedlings to the positions corresponding to the seedling clamps.

[0041] The seedling feeding device includes a seedling feeding frame fixed on the frame, a conveying chain rotatably arranged on the seedling feeding frame, and a seedling feeding driving mechanism for driving the conveying chain to rotate. The conveying chain includes a transverse conveying section, a vertical conveying section, and a transition section arranged in sequence along the circumference, and a seedling placing tray is arranged on the conveying chain. The lower end of the vertical conveying section forms a seedling picking point. The conveying chain in this embodiment adopts a double-chain structure. Specifically, the conveying chain includes two seedling feeding chains 28 arranged in parallel with each other. The seedling placing tray 17 includes a placing plate and retaining bars fixed on both sides of the placing plate. The two ends of the placing plate are respectively fixed to the two seedling feeding chains of the conveying chain. The retaining bars and the placing plate form a sweet potato seedling placing space. There are two sets of seedling feeding devices to respectively correspond to the seedling clamps on both sides of the turntable. The seedling feeding chains of each seedling feeding device are distributed in a right triangle, and one of the right-angled sides is located at the top. The other right-angled sides of the two seedling feeding devices are arranged adjacent to each other. A sprocket 16 is arranged at the corner of each seedling feeding chain.

[0042] A retaining strip 18 extending vertically and corresponding to the height of the vertical conveying section is also fixed on the seedling feeding frame. The retaining strip is located outside the conveying chain, and the distance between the retaining strip and the placing plate located in the vertical conveying section is less than or equal to the height of the retaining bar. The seedling feeding device is installed behind the transplanting device. The seedling placing trays 17 of the two groups of seedling feeding chains 28 are placed relatively staggered and respectively cooperate with the seedling clamps on both sides of the transplanting device. The seedling clamps will pass through the inside of the seedling feeding chain 28 during the rotational movement. The retaining strip 18 is placed in the gap of the seedling placing tray 17 and extends from the top of the vertical conveying section of the chain to the seedling clamping point of the transplanting device to prevent sweet potato seedlings from falling during the movement. Sweet potato seedling placing grooves 19 are also fixed on both sides of the conveying chain on the seedling feeding frame. The length direction of the sweet potato seedling placing grooves is consistent with the length direction of the transverse conveying section of the conveying chain to facilitate the placement of sweet potato seedlings to be transplanted. The sweet potato seedling placing grooves are located between the seat and the conveying chain to facilitate the staff to take the sweet potato seedlings. The seedling feeding device further includes a driven shaft II 13 rotatably arranged on the seedling feeding frame, a bevel gear I 14 and a driven sprocket II 20 installed on the driven shaft II 13. The bevel gear I 14 is meshed with a bevel gear II 15. The driven sprocket II 20 receives the power output by the gearbox through chain drive, thereby driving the driven shaft II 13 and the bevel gear I 14 to rotate. The meshing transmission of the bevel gear I 14 and the bevel gear II 15 drives the sprockets at the bottom of the seedling feeding chain to rotate respectively, thereby realizing the rotation of the seedling feeding chain.

[0043] A transplanting method using the disc clamp type sweet potato transplanter of this embodiment includes the following steps:

[0044] 1. Manually place the seedling tray with sweet potato seedlings on the sweet potato seedling placing groove. Drive the whole transplanter to move in the field by a tractor. During the forward movement of the transplanter, cultivate and loosen the land through the rotary tillage device, and ridge and shape the loosened soil through the ridging device;

[0045] 2. Workers place the sweet potato seedlings on the seedling tray of the horizontal conveying section of the seedling feeding device flatly, with the roots of the sweet potato seedlings facing the side where the seedling planting position is located. Through the power transmission of the gearbox via the sprocket chain and bevel gears, the sweet potato seedlings are conveyed to the vertical conveying section by the rotation of the seedling feeding chain, and the vertical conveying section conveys the sweet potato seedlings to the seedling picking point at the bottom of the chain. Specifically, the gearbox 21 transmits power to the driven shaft II 13 through the sprocket chain. The rotation of the driven shaft II 13 drives the bevel gear I 14 to rotate. The bevel gear II 15 that cooperates with the bevel gear I 14 rotates to drive the sprocket 16 to rotate. Perpendicular to Figure 1 the direction shown, the set of seedling feeding chains on the left rotates clockwise, and the seedling trays 17 evenly fixed on the seedling feeding chain rotate clockwise to convey the seedlings. The seedling feeding chains of the set of seedling feeding devices on the right rotate counterclockwise, and the seedling trays 17 rotate counterclockwise accordingly to convey the seedlings, transferring the seedlings from the upper part of the seedling feeding chain 28 to the bottom end of the seedling feeding chain. To prevent the seedlings from falling during the transfer process, the retaining strip is installed in the direction of the right-angled side perpendicular to the ground of the triangular chain.

[0046] 3. The gearbox drives the turntable to rotate through the sprocket chain. When the seedling clamp on the turntable rotates to the seedling picking point, the clamping end of the seedling clamp closes under the action of the spring, and the seedling clamp clamps the root of the sweet potato seedling. As the whole machine moves forward and the turntable rotates, the root of the sweet potato seedling is inserted into the soil, and then the seedling clamp opens under the action of the circular pressing plate. During the movement of the seedling clamp from the seedling planting point to the seedling picking point, the second clamp body contacts the circular pressing plate. By using the blocking effect of the circular pressing plate, the distal end of the second clamp body rotates outward around the fixed pin, so that the clamping end is in an open state. When the second clamp body moves to the position corresponding to the extrusion break, it loses the blocking effect of the circular pressing plate, and the clamping end gradually closes under the action of the spring. When the seedling clamp moves to the clamping point, it clamps the root of the sweet potato seedling.

[0047] 4. During the process of the previous seedling clamp sending the sweet potato seedling to the seedling planting point, the seedling feeding chain rotates, moving the next sweet potato seedling to the position corresponding to the next seedling clamp.

[0048] 5. The frame is used to play a supporting role and, together with the ground wheels, is used to bear the weight of other components. The tractor is connected to the hanger to drive the forward movement of the whole mechanism. The power of the rotary tillage device, the rice transplanting device, and the seedling feeding device all comes from the gearbox, which not only simplifies the machinery of the sweet potato transplanter but also increases the utilization rate of power.

[0049] In this embodiment, the seedling clamp realizes opening and closing under the combined action of the center pressing plate and the extrusion break. When the seedling clamp rotates to the bottom end of the seedling feeding device, it clamps the sweet potato seedling. The sweet potato seedling is planted in the middle of the ridge as the seedling clamp rotates, enabling the staggered transplanting of double rows in large ridges of sweet potatoes. One operation can complete processes such as rotary tillage, ridge formation, and seedling transplantation, improving the sweet potato planting efficiency and achieving the close planting of sweet potatoes.

[0050] Certainly, the above description is not limited to the above examples. The technical features not described in the present invention can be implemented by or adopt the prior art, and will not be elaborated herein. The above embodiments and drawings are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the technical field within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A disk clip type sweet potato transplanter, comprising a frame (1) equipped with ground wheels (24), characterized in that: A rotary tillage device, a ridging device (23), a rice transplanting device, and a seedling feeding device are successively installed on the frame from front to back. The clamping point of the rice transplanting device is adapted to the seedling taking point of the seedling feeding device, and the seedling dropping point of the rice transplanting device is adapted to the ridge formed by the ridging device; The rice transplanting device includes a turntable (10) rotatably arranged on the frame and a rice transplanting driving mechanism for driving the turntable to rotate. A plurality of seedling clamps are installed on the turntable and arranged in sequence along the circumference. The moving track of the seedling clamping end of the seedling clamp passes through the clamping point; The seedling clamp includes a first clamp body (7) and a second clamp body (8) arranged oppositely, and the first clamp body (7) is located between the second clamp body (8) and the turntable (10). The first clamp body and the second clamp body are connected by a spring (4). The proximal end of the first clamp body is fixedly connected to the turntable, and the distal ends of the first clamp body and the second clamp body form the seedling clamping end of the seedling clamp; A cross bar (33) parallel to the axis of the turntable is fixedly arranged on the turntable. The second clamp body is rotatably connected to the cross bar through a fixing pin, and the fixing pin is located between the proximal end of the second clamp body and the spring; A circular pressing plate (34) adapted to the proximal end of the second clamp body is fixedly arranged on the frame. An extrusion break (32) is provided on the circular pressing plate, and the extrusion break corresponds to the track of the seedling clamp rotating from the clamping point to the seedling dropping point. When the proximal end of the second clamp body moves to the corresponding interval of the extrusion break, it is not affected by the circular pressing plate, and the seedling clamping part at the distal end of the second clamp body rotates towards the first clamp body, and the whole seedling clamp presents a closed state; when the second clamp body moves to a position blocked by the pressing plate, the seedling clamping part at the distal end of the second clamp body rotates away from the first clamp body, and the whole seedling clamp presents an open state; the ends of the first clamp body and the second clamp body close to the center of the turntable are the proximal ends, and the ends away from the center of the turntable are the distal ends; A connecting rod extending radially is fixedly arranged at the proximal end of the second clamp body. A circular plate tangent to the circular pressing plate is rotatably installed at the end of the connecting rod away from the second clamp body, and the circular plate is coaxial with the connecting rod.

2. The disk clamp type sweet potato transplanter according to claim 1, characterized in that: Two support shafts (11) are fixedly arranged on the frame on the left and right sides of the turntable respectively. A hollow shaft sleeved on the support shaft (11) and rotatably connected to the support shaft is fixedly arranged at the center of the turntable. The two support shafts are coaxially arranged with the turntable and the hollow shaft; A cover plate (9) is fixedly arranged on the support shaft. The cover plate includes a support plate fixedly connected to the support shaft, a top plate extending from the upper end of the support plate towards the side where the turntable is located, and a side plate extending downward from the end of the top plate away from the support plate. The side plate forms the circular pressing plate (34), and a through hole for the hollow shaft to pass through is provided on the circular pressing plate.

3. A disk clip type sweet potato transplanter according to claim 1, characterized in that: Seedling clamps are arranged on both the left and right sides of the turntable, and the seedling clamps on the left and right sides are arranged staggeredly along the circumference. Seedling feeding devices corresponding to the seedling clamps on the left and right sides are arranged on the frame.

4. A disk clamp type sweet potato transplanter according to claim 1, characterized in that: A gearbox (21) is installed on the frame. The first output shaft of the gearbox is in transmission connection with the rotary tillage device and the rice transplanting device, and the second output shaft of the gearbox is in transmission connection with the seedling feeding device.

5. A disk clip type sweet potato transplanter according to claim 1, characterized in that: The seedling feeding device includes a seedling feeding frame fixedly arranged on the frame, a conveying chain rotatably arranged on the seedling feeding frame, and a seedling feeding driving mechanism for driving the conveying chain to rotate. The conveying chain includes a transverse conveying section, a vertical conveying section, and a transition section sequentially arranged in the circumferential direction, and a seedling placing tray is arranged on the conveying chain, and the lower end of the vertical conveying section forms a seedling taking point.

6. The disk clip type sweet potato transplanter according to claim 5, wherein: The conveying chain includes two seedling feeding chains arranged in parallel with each other; the seedling placing tray (17) includes a placing plate, and retaining bars fixedly arranged on both sides of the placing plate. The two ends of the placing plate are respectively fixedly connected to the two seedling feeding chains of the conveying chain, and the retaining bars and the placing plate form a sweet potato seedling placing space.

7. The disk clip type sweet potato transplanter according to claim 6, characterized in that: A retaining bar (18) extending vertically and corresponding to the height of the vertical conveying section is also fixedly arranged on the seedling feeding frame. The retaining bar is located outside the conveying chain, and the distance between the retaining bar and the placing plate located in the vertical conveying section is less than or equal to the height of the retaining bar.

8. A transplanting method using the disk clip type sweet potato transplanter according to any one of claims 1 to 7, characterized in that, It includes the following steps: (1) Place the seedling tray with sweet potato seedlings on the sweet potato seedling placing groove. Drive the transplanter to move in the field by a tractor. During the forward movement of the transplanter, cultivate and loosen the land through the rotary tillage device, and ridge and shape the loosened soil through the ridging device; (2) The worker places the sweet potato seedlings on the seedling tray flat on the seedling placing tray of the transverse conveying section of the seedling feeding device, and makes the roots of the sweet potato seedlings face the side where the sweet potato seedling planting position is located. The sweet potato seedlings are conveyed to the vertical conveying section by the rotation of the seedling feeding chain, and the vertical conveying section conveys the sweet potato seedlings to the seedling taking point at the bottom of the chain; (3) The turntable rotates. When the seedling clip on the turntable rotates to the seedling taking point, the clamping end of the seedling clip closes under the action of the spring, and the seedling clip clamps the root of the sweet potato seedling. As the whole machine moves forward and the turntable rotates, the root of the sweet potato seedling is inserted into the soil, and then the seedling clip opens under the action of the circular pressing plate; during the movement of the seedling clip from the seedling planting point to the seedling taking point, the second clip body contacts the circular pressing plate, and by using the blocking effect of the circular pressing plate, the distal end of the second clip body rotates outward around the fixed pin, and the clamping end is in an open state; when the second clip body moves to the position corresponding to the extrusion break, losing the blocking effect of the circular pressing plate, the clamping end gradually closes under the action of the spring, and when the seedling clip moves to the seedling clamping point, it clamps the root of the sweet potato seedling; (4) During the process of the previous seedling clip sending the sweet potato seedling to the seedling planting point, the seedling feeding chain rotates, so that the next sweet potato seedling moves to the position corresponding to the next seedling clip.

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