Sweet potato seedling delivery device, sweet potato seedling delivery method and sweet potato transplanting machine using the device

Abstract

The application discloses a sweet potato seedling conveying device and a sweet potato seedling conveying method and a sweet potato transplanting machine using the device. In the seedling storage assembly of the application, one end of each seedling tube is fixed by a braided rope, and the other end is fixed by another braided rope; in the seedling conveying assembly, the unwinding shaft, the driving shaft and the winding shaft are parallel to each other and form rotary pairs with the support, the poking wheel is fixed on the driving shaft, the driving shaft and the fixed rotating shaft one on the rotor two of the electromagnetic clutch are connected through a belt transmission mechanism, the fixed output shaft on the rotor two of the electromagnetic clutch and the winding shaft are connected through a one-way bearing, and the rotating shaft one and the output shaft form rotary pairs with the support; the application realizes the seedling storage of a single sweet potato seedling through each seedling tube in the seedling storage assembly, and realizes the seedling conveying work through the seedling conveying assembly, thereby reducing the labor intensity and improving the transplanting efficiency; meanwhile, the pipe chain type structure design of the seedling conveying assembly cooperates with the seedling storage assembly, and the recycling of the seedling storage assembly can be realized.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, specifically relating to a sweet potato seedling delivery device and its delivery method, and a sweet potato transplanter using the device. Background Technology

[0002] Seedling separation and delivery is one of the key steps in automated sweet potato seedling transplanting. Currently, sweet potato transplanters rely on manual seedling separation and delivery, which is labor-intensive and inefficient, thus reducing transplanting efficiency. Existing automated seedling separation and delivery mechanisms are mainly vibration-type, pneumatic-type, and seedling belt-type. However, vibration-type seedling separation is not very effective and the sweet potato seedlings are prone to tangling, affecting the subsequent seedling retrieval and transplanting work. Pneumatic-type seedling separation suffers from inaccurate seedling separation and is also prone to tangling. Seedling belt-type seedlings have problems such as complex seedling belt recycling, low flexibility, and difficulty in coordinating with the transplanting arm to achieve specific trajectory transplanting. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a sweet potato seedling delivery device, a seedling delivery method, and a sweet potato transplanter using the device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The present invention relates to a sweet potato seedling delivery device, comprising a support frame, a seedling storage component, and a seedling delivery component.

[0006] The seedling storage assembly includes seedling tubes, braided ropes, a first insert plate, and a second insert plate. The seedling tubes are arranged in parallel and at equal intervals. One end of each seedling tube is fixed by a braided rope, and the other end is fixed by another braided rope. One end of each braided rope is fixed to both ends of the first insert plate, which is parallel to the seedling tube, and the other end is fixed to both ends of the second insert plate, which is parallel to the seedling tube.

[0007] The seedling feeding assembly includes an unwinding shaft, a deflector wheel, a drive shaft, a take-up shaft, an electromagnetic clutch, a spiral spring, a support plate, and a one-way bearing. The horizontally parallel and spaced-apart unwinding and take-up shafts both form a rotating pair with the support, and a through slot is formed at the same end of both shafts. The drive shaft is parallel to the take-up shaft and forms a rotating pair with the support. The deflector wheel is fixed to one end of the drive shaft near the through slot, and multiple deflector plates are fixed on the cylindrical surface of the deflector wheel at equal intervals along the circumference, with the deflector plates arranged radially. The electromagnetic clutch is coaxially arranged with the take-up shaft, and a rotating shaft is fixed on the rotor of the electromagnetic clutch away from the take-up shaft. First, a second rotating shaft is fixed on a rotor second near the take-up shaft; the first rotating shaft and the bracket form a rotating pair and are connected to the drive shaft via a belt drive mechanism; the support plate is fixed on the bracket and located between the electromagnetic clutch and the take-up shaft; the end of the second rotating shaft away from the electromagnetic clutch passes through a circular hole in the support plate, is coaxially fixed with the outer ring of the one-way bearing, and forms a rotating pair with the circular hole, while the inner ring of the one-way bearing is fixed on the take-up shaft; the spiral spring is sleeved on the second rotating shaft, with its inner end fixed to the second rotating shaft and its outer end fixed to the support plate, and the spiral spring is in a compressed state; a pressure sensor is provided on the support plate outside the spiral spring. The drive shaft is driven by an external power source; initially, each seedling tube is wound around the insertion plate one or two via braided ropes, the seedling storage assembly is cylindrical, and the pressure value detected by the pressure sensor is the initial pressure value.

[0008] Preferably, the unwinding shaft, drive shaft, rewinding shaft, and rotating shaft are all supported on the bracket by bearing seats.

[0009] Preferably, the belt drive mechanism includes a driving pulley, a synchronous belt, and a driven pulley. The driving pulley and the driven pulley are respectively fixed on the driving shaft and the rotating shaft, and are connected by the synchronous belt.

[0010] Preferably, a bearing cup sleeve is fixed at the end of the rotating shaft away from the electromagnetic clutch, a one-way bearing is placed inside the bearing cup sleeve, and the outer ring of the one-way bearing is fixed to the bearing cup sleeve.

[0011] Preferably, the support plate and the bracket are fixed by a U-shaped component.

[0012] Preferably, a spring box is fixed on the support plate, the spiral spring is placed inside the spring box, and the outer end of the spiral spring is fixed on the spring box.

[0013] Preferably, a sensor support is fixed on the support plate, and the pressure sensor is disposed on the sensor support.

[0014] The seedling delivery method of the sweet potato seedling delivery device of the present invention is as follows:

[0015] Step 1: Place one sweet potato seedling into each seedling tube. If the braided ropes and seedling tubes are wrapped around the insert plate 1, insert the insert plate 1 into the groove of the unwinding shaft. Pull the insert plate 2 to move the end of each braided rope closest to the insert plate 2 around the actuating wheel, and insert the insert plate 2 into the groove of the winding shaft. At this time, several seedling tubes at the outer end of the seedling storage assembly are released, and the outermost seedling tube is positioned between an actuating plate at the lowest position on the actuating wheel and another actuating plate adjacent to that actuating plate and close to the unwinding shaft. The ends of each braided rope closest to the insert plate 2... One end is in a taut state; if each braided rope and each seedling tube is wound on the second insert plate, then the second insert plate is inserted into the through groove of the unwinding shaft, and the first insert plate is pulled to drive the end of each braided rope near the first insert plate to pass over the actuating wheel, and the first insert plate is inserted into the through groove of the winding shaft. At this time, several seedling tubes located at the outer end of the seedling storage assembly are released, and the outermost seedling tube is located between an actuating plate at the lowest position on the actuating wheel and another actuating plate adjacent to the actuating plate and close to the unwinding shaft. The end of each braided rope near the first insert plate is in a taut state.

[0016] Step Two: An external power source drives the drive shaft to rotate the actuating wheel and each actuating plate clockwise. One seedling tube on the actuating wheel is moved to its lowest position, and the moved seedling tube, through the braided ropes and insert plate one or two, drives the unwinding shaft to rotate counterclockwise. One seedling tube wound on insert plate one or two is released, and the end of each braided rope near insert plate two or insert plate one is in a slack state. At the same time, because the electromagnetic clutch is energized, rotor one and rotor two of the electromagnetic clutch are attracted together. The drive shaft also drives shaft one to rotate clockwise through the belt drive mechanism. Shaft one drives shaft two to rotate clockwise through the electromagnetic clutch. Shaft two drives the outer ring of the one-way bearing to rotate clockwise, and drives the spiral spring to compress. The spiral spring stores energy. When the inner ring of the bearing does not rotate, the pressure value detected by the pressure sensor decreases until it falls below the preset pressure value. At this point, the electromagnetic clutch is de-energized, and rotors one and two of the electromagnetic clutch disengage. The spiral spring drives shaft two to reverse, increasing the pressure value detected by the pressure sensor. Shaft two then drives the inner ring of the one-way bearing to reverse via the outer ring of the one-way bearing, which in turn drives the winding shaft to reverse. The winding shaft, through insert plate two or insert plate one, drives the slack ends of each braided rope to wind around insert plate two or insert plate one. When the pressure value detected by the pressure sensor returns to the initial pressure value, the electromagnetic clutch is energized, and rotors one and two of the electromagnetic clutch re-engage.

[0017] Step 3: Repeat Step 2. During the repetition of Step 2, as the winding shaft reverses multiple times, the winding shaft drives the braided ropes and seedling tubes that pass over the actuating wheel to wind around the second or first insert plate until all sweet potato seedlings are delivered. Then, the drive shaft stops and the first and second insert plates are removed.

[0018] The sweet potato transplanter using the sweet potato seedling delivery device of the present invention also includes a frame, a moving trolley, and a transplanting mechanism. The moving trolley drives the frame to move, and the support is fixed on the frame. The transplanting mechanism is located on the frame and in front of the actuating wheel. The power input shaft of the transplanting mechanism is driven by an external power source. A reduction gearbox is provided on the frame. The power input shaft of the reduction gearbox is connected to the power input shaft of the transplanting mechanism through a bevel gear pair. The power output shaft is connected to the drive shaft through a chain drive mechanism. The drive shaft is driven by the power output shaft.

[0019] The present invention has the following beneficial effects:

[0020] This invention achieves seedling storage through a seedling storage component. During use, each seedling tube contains one sweet potato seedling, avoiding the inaccurate seedling separation or low seedling delivery efficiency of existing seedling separation and delivery mechanisms, which affects the subsequent seedling retrieval and transplanting work, thus improving transplanting efficiency. Furthermore, this invention uses the drive shaft in the seedling delivery component to drive the actuating wheel and each actuating plate to rotate forward, so that each actuating plate moves each seedling tube one by one to the lowest position of the actuating wheel, realizing the seedling delivery work, reducing manual labor intensity, and further improving transplanting efficiency. At the same time, the tubular chain structure design of the seedling delivery component and the seedling storage component enables the recycling of the seedling storage component. The recycling process is simple, highly flexible, and can be recycled as a whole in one go, without the need to recycle each seedling tube individually, thereby reducing manual labor intensity and costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the winding shaft, electromagnetic clutch, spiral spring, support plate and one-way bearing in this invention.

[0023] Figure 3 This is a schematic diagram of the structure of the seedling storage component, the actuating wheel, the winding shaft, and the one-way bearing in this invention. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the sweet potato seedling delivery device of the present invention includes a support frame 9, a seedling storage component, and a seedling delivery component.

[0026] The seedling storage assembly includes a seedling tube 1, a braided rope 2, a first insert plate 3, and a second insert plate 7. The seedling tube 1 has multiple parallel and equidistantly arranged seedling tubes. One end of each seedling tube 1 is fixed by a braided rope 2, and the other end is fixed by another braided rope 2. One end of each braided rope 2 is fixed to both ends of the first insert plate 3 parallel to the seedling tube 1, and the other end is fixed to both ends of the second insert plate 7 parallel to the seedling tube 1.

[0027] The seedling feeding assembly includes an unwinding shaft 4, a deflector wheel 5, a drive shaft 6, a take-up shaft 8, an electromagnetic clutch 15, a spiral spring 17, a support plate 20, and a one-way bearing 24. The horizontally parallel and spaced unwinding shaft 4 and take-up shaft 8 both form a rotating pair with the support 9, and both ends of the unwinding shaft 4 and take-up shaft 8 have through slots. The drive shaft 6 is parallel to the take-up shaft 8 and forms a rotating pair with the support 9. The deflector wheel 5 is fixed to one end of the drive shaft 6 near the through slot, and multiple deflector plates are fixed on the cylindrical surface of the deflector wheel 5, equidistantly arranged circumferentially, with the deflector plates arranged radially. The electromagnetic clutch 15 is coaxially arranged with the take-up shaft 8, and a rotating shaft 14 is fixed on the rotor 1 of the electromagnetic clutch 15 away from the take-up shaft 8, while a rotating shaft 21 is fixed on the rotor 2 of the electromagnetic clutch 15 closer to the take-up shaft 8. 6; The first rotating shaft 14 and the bracket 9 form a rotating pair and are connected to the drive shaft 6 through a belt drive mechanism; the support plate 20 is fixed on the bracket 9 and is located between the electromagnetic clutch 15 and the winding shaft 8; the end of the second rotating shaft 16 away from the electromagnetic clutch 15 passes through the circular hole opened on the support plate 20, is coaxially fixed with the outer ring of the one-way bearing 24, and forms a rotating pair with the circular hole, and the inner ring of the one-way bearing 24 is fixed on the winding shaft 8; the spiral spring 17 is sleeved on the second rotating shaft 16, the inner end of the spiral spring 17 is fixed on the second rotating shaft 16, the outer end is fixed on the support plate 20, and the spiral spring 17 is in a compressed state; a pressure sensor 22 is provided on the support plate 20 outside the spiral spring 17, and the pressure sensor 22 is used to detect the degree of compression of the spiral spring 17. Among them, the drive shaft 6 is driven by an external power source; in the initial state, each seedling tube 1 is wound around the insertion plate 3 or the insertion plate 7 by each braided rope 2, the seedling storage component is cylindrical, and the pressure value detected by the pressure sensor 22 is the initial pressure value.

[0028] In a preferred embodiment, the unwinding shaft 4, the drive shaft 6, the take-up shaft 8, and the rotating shaft 14 are all supported on the bracket 9 by bearing seats 25.

[0029] In a preferred embodiment, the belt drive mechanism includes a driving pulley 11, a timing belt 12, and a driven pulley 13. The driving pulley 11 and the driven pulley 13 are respectively fixed on the driving shaft 6 and the rotating shaft 14, and are connected by the timing belt 12.

[0030] In a preferred embodiment, a bearing cup sleeve 23 is fixed at the end of the rotating shaft 16 away from the electromagnetic clutch 15, and a one-way bearing 24 is placed inside the bearing cup sleeve 23, with the outer ring of the one-way bearing 24 fixed to the bearing cup sleeve 23.

[0031] In a preferred embodiment, the support plate 20 and the bracket 9 are fixed by the U-shaped member 19.

[0032] In a preferred embodiment, a spring box 18 is fixed on the support plate 20, a spiral spring 17 is placed inside the spring box 18, and the outer end of the spiral spring 17 is fixed on the spring box 18. The spring box 18 is used to protect the spiral spring 17.

[0033] In a preferred embodiment, a sensor support 21 is fixed on the support plate 20, and a pressure transducer 22 is disposed on the sensor support 21.

[0034] The seedling delivery method of the sweet potato seedling delivery device of the present invention is as follows:

[0035] Step 1: Place one sweet potato seedling into each seedling tube 1. If each braided rope 2 and each seedling tube 1 is wrapped around the insert plate 3, insert the insert plate 3 into the slot of the unwinding shaft 4. Pull the insert plate 7 to move one end of each braided rope 2 near the insert plate 7 around the actuating wheel 5, and insert the insert plate 7 into the slot of the winding shaft 8. At this time, several seedling tubes 1 at the outer end of the seedling storage assembly are released, and the outermost seedling tube 1 is between an actuating plate at the lowest position on the actuating wheel 5 and another actuating plate adjacent to the actuating plate and close to the unwinding shaft 4. One end is in a taut state; if each braided rope 2 and each seedling tube 1 is wound on the insert plate 2 7, then insert plate 2 7 is inserted into the through groove of the unwinding shaft 4, and the insert plate 3 is pulled to drive the end of each braided rope 2 near the insert plate 3 to pass around the actuating wheel 5, and insert plate 3 is inserted into the through groove of the winding shaft 8. At this time, several seedling tubes 1 located at the outer end of the seedling storage assembly are released, and the outermost seedling tube 1 is located between an actuating plate at the lowest position on the actuating wheel 5 and another actuating plate adjacent to the actuating plate and close to the unwinding shaft 4. The end of each braided rope 2 near the insert plate 3 is in a taut state.

[0036] Step 2: An external power source drives the drive shaft 6 to rotate the actuating wheel 5 and each actuating plate clockwise. A seedling tube 1 on the actuating wheel 5 is pushed to its lowest position, achieving the seedling delivery function. The actuated seedling tube 1, through the braided ropes 2 and the first or second insert plate 7, drives the unwinding shaft 4 in reverse, releasing a seedling tube 1 wound on the first or second insert plate 7. The end of each braided rope 2 near the second or third insert plate is in a slack state. Simultaneously, because the electromagnetic clutch 15 is energized, rotors one and two of the electromagnetic clutch 15 are attracted together. The drive shaft 6 also drives the rotating shaft 14 clockwise through the belt drive mechanism. The rotating shaft 14, through the electromagnetic clutch 15, drives the rotating shaft 16 clockwise. The rotating shaft 16 drives the outer ring of the one-way bearing 24 clockwise, and compresses the spiral spring 17. The spiral spring 17 then... During energy storage, the inner ring of the one-way bearing 24 does not rotate, and the pressure value detected by the pressure sensor 22 decreases until it is lower than the preset pressure value. Then, the electromagnetic clutch 15 is de-energized, and rotors 1 and 2 of the electromagnetic clutch 15 disengage. The spiral spring 17 drives the rotating shaft 2 16 to reverse, increasing the pressure value detected by the pressure sensor. The rotating shaft 2 16, through the outer ring of the one-way bearing 24, drives the inner ring of the one-way bearing 24 to reverse, which in turn drives the winding shaft 8 to reverse. The winding shaft 8, through the insert plate 2 7 or the insert plate 1 3, drives the end of each braided rope 2 that is close to the insert plate 2 7 or the insert plate 1 3 and is in a slack state to wind around the insert plate 2 7 or the insert plate 1 3. When the pressure value detected by the pressure sensor returns to the initial pressure value, the electromagnetic clutch 15 is energized, and rotors 1 and 2 of the electromagnetic clutch 15 re-engage.

[0037] Step 3: Repeat Step 2. During the repetition of Step 2, as the winding shaft reverses multiple times, the winding shaft drives the braided ropes and seedling tubes that pass over the actuating wheel 5 to wind around the insert plate 2 or insert plate 1, thereby realizing the retrieval of the seedling tubes until all sweet potato seedlings have been delivered. Then, the drive shaft 6 stops and insert plate 1 and insert plate 2 are removed.

[0038] The sweet potato transplanter using the sweet potato seedling delivery device of the present invention further includes a frame, a moving trolley, and a transplanting mechanism. The moving trolley drives the frame to move. The support 9 is fixed on the frame. The transplanting mechanism is located on the frame and in front of the actuating wheel. The power input shaft of the transplanting mechanism is driven by an external power source. A reduction gearbox is provided on the frame. The power input shaft of the reduction gearbox is connected to the power input shaft of the transplanting mechanism through a bevel gear pair. The power output shaft is connected to the drive shaft 6 through a chain drive mechanism. The drive shaft 6 is driven by the power output shaft. The driven sprocket 10 of the chain drive mechanism is fixed on the drive shaft 6.

[0039] Example 1: The transplanting mechanism adopts the transplanting device in the patent "A Sweet Potato Naked Seedling Transplanter and Transplanting Method" with application number 202310255993.6. The L-shaped plate in the transplanting device is fixed on the frame, and the gearbox shaft is the power input shaft of the transplanting mechanism, which is connected to the power input shaft of the reduction gearbox through a bevel gear pair.

[0040] Example 2: The transplanting mechanism adopts the component consisting of a transplanting device and a seedling clamping device from the patent "Intelligent Sweet Potato Naked Seedling Transplanter" with application number 201710141354.1. The connecting plate in this component is fixed on the frame, and the drive gear shaft is the power input shaft of the transplanting mechanism, which is connected to the power input shaft of the reduction gearbox through a bevel gear pair.

[0041] The working principle of the sweet potato transplanter using the sweet potato seedling delivery device of this invention is as follows:

[0042] The mobile trolley drives the frame to move, while the drive unit drives the power input shaft of the transplanting mechanism to rotate. The transplanting mechanism performs seedling picking and transplanting. The power input shaft of the transplanting mechanism drives the drive shaft 6 of the seedling delivery component to rotate forward through the reduction gearbox and chain drive mechanism. The seedling delivery component performs seedling delivery and retrieval until all sweet potato seedlings have been transplanted. Specifically, when a seedling tube 1 is moved to the lowest position of the actuating wheel 5, the grippers of the transplanting mechanism (two grippers in patent application number 202310255993.6, or gripping finger one and gripping finger two in patent application number 201710141354.1) move to the front of the seedling tube 1 and grip the sweet potato seedling inside the seedling tube 1 to complete the seedling picking. Then the grippers of the transplanting mechanism perform the transplanting work, while the actuating wheel 5 continues to move the seedling tube 1.

Claims

1. Sweet potato seedling delivery device, comprising a support, a seedling storage assembly and a seedling delivery assembly, characterized in that: The seedling storage assembly comprises seedling tubes, braided ropes, a first insertion plate and a second insertion plate, the seedling tubes are parallel and equidistantly arranged, one end of each seedling tube is fixed by a braided rope, the other end is fixed by another braided rope, and one end of the two braided ropes is fixed to the two ends of the first insertion plate which is parallel to the seedling tubes, and the other end is fixed to the two ends of the second insertion plate which is parallel to the seedling tubes; The seedling feeding assembly comprises a pay-off shaft, a poking wheel, a driving shaft, a winding shaft, an electromagnetic clutch, a scroll spring, a support plate and a one-way bearing; the horizontally parallel and spaced pay-off shaft and winding shaft form a rotating pair with the support frame, and the same end of the pay-off shaft and the winding shaft is provided with a through slot; the driving shaft is parallel to the winding shaft and forms a rotating pair with the support frame; the poking wheel is fixed to one end of the driving shaft close to the through slot, and a plurality of poking plates are fixed to the cylindrical surface of the poking wheel and are equidistantly arranged in the circumferential direction, the poking plates being arranged in the radial direction; the electromagnetic clutch is coaxially arranged with the winding shaft, and a rotating shaft one is fixed to one end of the rotor one of the electromagnetic clutch away from the winding shaft, and a rotating shaft two is fixed to one end of the rotor two of the electromagnetic clutch close to the winding shaft; the rotating shaft one forms a rotating pair with the support frame and is connected with the driving shaft through a belt transmission mechanism; the support plate is fixed to the support frame and is located between the electromagnetic clutch and the winding shaft; one end of the rotating shaft two away from the electromagnetic clutch passes through a circular hole provided in the support plate, is coaxially fixed with the outer ring of the one-way bearing, and forms a rotating pair with the circular hole, and the inner ring of the one-way bearing is fixed to the winding shaft; the scroll spring is sleeved on the rotating shaft two, the inner end of the scroll spring is fixed to the rotating shaft two, and the outer end is fixed to the support plate, and the scroll spring is in a compressed state; a pressure sensor is arranged on the outer side of the scroll spring on the support plate; in the initial state, each seedling tube is wound on the first insertion plate or the second insertion plate through the braided ropes, and the seedling storage assembly is in a cylindrical shape.

2. The sweet potato seedling delivering apparatus according to claim 1, characterized by: The pay-off shaft, the driving shaft, the winding shaft and the rotating shaft one are supported on the support frame by bearing seats.

3. The sweet potato seedling delivering apparatus according to claim 1, wherein: The belt transmission mechanism comprises a driving pulley, a synchronous belt and a driven pulley, the driving pulley and the driven pulley are fixed to the driving shaft and the rotating shaft one respectively and are connected by the synchronous belt.

4. The sweet potato seedling delivering apparatus according to claim 1, wherein: One end of the rotating shaft two away from the electromagnetic clutch is fixed with a bearing cup sleeve, the one-way bearing is arranged in the bearing cup sleeve, and the outer ring of the one-way bearing is fixed with the bearing cup sleeve.

5. The sweet potato seedling delivering apparatus according to claim 1, wherein: The support plate and the support frame are fixed by a U-shaped piece.

6. The sweet potato seedling delivering apparatus according to claim 1, wherein: A spring box is fixed on the support plate, the scroll spring is arranged in the spring box, and the outer end of the scroll spring is fixed to the spring box.

7. The sweet potato seedling delivering apparatus according to claim 1, wherein: A sensor support is fixed on the support plate, and the pressure sensor is arranged on the sensor support.

8. The sweet potato seedling delivering method of the sweet potato seedling delivering apparatus according to any one of claims 1 to 7, characterized by: The specific implementation is as follows: Step one, if each woven rope and each seedling tube is wound on the first inserting plate, the first inserting plate is inserted into the through slot of the unwinding shaft, the second inserting plate is pulled to drive the end of each woven rope near the second inserting plate to pass through the poking wheel, and the second inserting plate is inserted into the through slot of the winding shaft, at this time, the several seedling tubes on the outer end of the seedling storage assembly are released, and the seedling tube on the outermost end is located between the poking plate on the lowest end position of the poking wheel and the other poking plate adjacent to the poking plate and close to the unwinding shaft, and the end of each woven rope near the second inserting plate is in a tension state; if each woven rope and each seedling tube is wound on the second inserting plate, the second inserting plate is inserted into the through slot of the unwinding shaft, the first inserting plate is pulled to drive the end of each woven rope near the first inserting plate to pass through the poking wheel, and the first inserting plate is inserted into the through slot of the winding shaft, at this time, the several seedling tubes on the outer end of the seedling storage assembly are released, and the seedling tube on the outermost end is located between the poking plate on the lowest end position of the poking wheel and the other poking plate adjacent to the poking plate and close to the unwinding shaft, and the end of each woven rope near the first inserting plate is in a tension state; Step two, the external power source drives the driving shaft to drive the poking wheel and the poking plates to rotate forward, a seedling tube on the poking wheel is poked to the lowest end position of the poking wheel, and the poked seedling tube drives the unwinding shaft to reverse through each woven rope and the first inserting plate or the second inserting plate, a seedling tube wound on the first inserting plate or the second inserting plate is released, and the end of each woven rope near the second inserting plate or the first inserting plate is in a relaxed state; at the same time, since the electromagnetic clutch is in an energized state, the rotor one and the rotor two of the electromagnetic clutch are attracted together, the driving shaft also drives the first rotating shaft to rotate forward through the belt transmission mechanism, the first rotating shaft drives the second rotating shaft to rotate forward through the electromagnetic clutch, the second rotating shaft drives the outer ring of the one-way bearing to rotate forward, and the volute spring is compressed, the volute spring stores energy, the inner ring of the one-way bearing does not rotate, the pressure value detected by the pressure sensor decreases, until the pressure value detected by the pressure sensor is lower than the preset pressure value, the electromagnetic clutch is de-energized, the rotor one and the rotor two of the electromagnetic clutch are disconnected, the volute spring drives the second rotating shaft to reverse, the pressure value detected by the pressure sensor increases, the second rotating shaft drives the inner ring of the one-way bearing to reverse through the outer ring of the one-way bearing, and then drives the winding shaft to reverse, the winding shaft drives the end of each woven rope near the second inserting plate or the first inserting plate and in a relaxed state to pass through the second inserting plate or the first inserting plate; when the pressure value detected by the pressure sensor returns to the initial pressure value, the electromagnetic clutch is energized, and the rotor one and the rotor two of the electromagnetic clutch are attracted together again; Step three, step two is repeated, and in the process of repeating step two, with the multiple reversals of the winding shaft, the winding shaft drives each woven rope and each seedling tube beyond the poking wheel to pass through the second inserting plate or the first inserting plate, until the seedling sending work of all sweet potato seedlings is completed, the driving shaft stops, and the first inserting plate and the second inserting plate are removed.

9. A sweet potato transplanting machine using the sweet potato seedling delivery device according to any one of claims 1 to 7, characterized in that: The device also comprises a frame, a moving trolley, and a transplanting mechanism. The moving trolley drives the frame to move. The support is fixed on the frame. The transplanting mechanism is arranged on the frame and located in front of the poking wheel. The power input shaft of the transplanting mechanism is driven by an external power source. The frame is provided with a reduction box. The power input shaft of the reduction box is connected with the power input shaft of the transplanting mechanism through a bevel gear pair. The power output shaft is connected with the driving shaft through a chain transmission mechanism. The driving shaft is driven by the power output shaft.

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