Pot seedling taking device

Abstract

The invention discloses a pot seedling taking device which comprises a rack and a seedling conveying assembly, a seedling tray rolling conveying assembly and a seedling taking ejector rod assembly which are installed on the rack, the seedling tray rolling conveying assembly comprises a seedling taking roller, a roller driving assembly and a tray pressing piece, and an arc-shaped channel used for conveying seedling trays is formed between the seedling taking roller and the tray pressing piece; the input end of the arc-shaped channel is connected with the output end of the seedling feeding assembly, the roller driving assembly is in transmission with the seedling taking roller to drive the seedling trays to pass through the arc-shaped channel, the seedling taking ejector rod assembly comprises a plurality of ejector rods and an ejector rod driving assembly, and the ejector rod driving assembly drives the ejector rods to eject pot seedlings in the seedling trays located in the arc-shaped channel out. According to the invention, the seedling tray can be bent through the arc-shaped channel, so that pot seedlings in the seedling tray can fall down sequentially and orderly after being ejected out, a seedling dropping switching device between a planting mechanism and a seedling taking device is reduced, and the overall structure is simplified. Meanwhile, pot seedlings are ejected out through the ejector rod, and the problem that seedling rods are prone to being crushed and broken when the seedlings are clamped by a mechanical arm is solved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a seedling extraction device. Background Technology

[0002] Currently, vegetable transplanters mainly employ two types: semi-automatic and fully automatic. Semi-automatic transplanters typically require two or more operators: one to drive and at least one to feed the seedlings into the planting device. Fully automatic transplanters replace the manual process of removing seedlings from the seedling tray and placing them into the planting mechanism with a seedling-retrieving mechanism, thus automating the entire transplanting process from seedling tray to planting.

[0003] Chinese patent application CN106717374A discloses an automatic transplanter's row-by-row seedling retrieval robot, designed for single-row, six-hole seedling trays, capable of retrieving an entire row of seedlings at once. However, after completing the seedling retrieval and placement operation, current transplanters are equipped with a maximum of two planting devices, meaning they can only receive a maximum of two seedlings for transplanting at a time. Not all six seedlings can be directly placed into the planting device, necessitating a transitional device such as a rotating seedling cup for temporary storage before the seedlings are sequentially placed into the planting mechanism. This makes the entire transplanting device overly bulky. Furthermore, the driving components of the row-by-row seedling retrieval device are reciprocating cylinders, responsible for clamping, flipping, and adjusting the spacing between seedlings. This process is overly complex, and due to the relatively large inertia of the entire mechanism, high-speed seedling retrieval and placement operations are impossible. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a seedling extraction device.

[0005] To address the aforementioned technical problems, this invention discloses a seedling removal device, comprising a frame and a seedling delivery assembly, a seedling tray rolling conveyor assembly, and a seedling removal push rod assembly mounted on the frame. The seedling tray rolling conveyor assembly includes a seedling removal roller, a roller drive assembly, and a pressure plate. An arc-shaped channel for conveying the seedling tray is formed between the seedling removal roller and the pressure plate. The input end of the arc-shaped channel is connected to the output end of the seedling delivery assembly. The roller drive assembly drives the seedling removal roller to drive the seedling tray through the arc-shaped channel. The seedling removal push rod assembly includes multiple push rods and a push rod drive assembly. The push rod drive assembly sequentially drives the same row of push rods to sequentially push out the seedlings in the seedling tray located in the arc-shaped channel.

[0006] Furthermore, the seedling-taking roller includes a roller drive shaft, a seedling tray drive rod, and roller end plates connected to both ends of the roller drive shaft and the seedling tray drive rod. The roller drive shaft is connected to the roller drive assembly for transmission. The seedling tray drive rod is arranged along the outer circumference of the roller drive shaft. The seedling tray drive rod is configured to engage with the pot groove of the seedling tray to drive the seedling tray to move along the arc-shaped channel and pass through the top rod.

[0007] Furthermore, the pressing plate component includes pressing plate rod assemblies disposed on the upper and lower sides of the seedling taking roller, and a seedling ejection channel is formed between the upper and lower pressing plate rod assemblies for the seedlings to fall after being ejected from the pot. The pressing plate rod assembly includes an arc-shaped pressing rod for pressing the seedling tray and a connecting rod for connecting the arc-shaped pressing rod, and the connecting rod forms an avoidance channel for avoiding the seedlings in the pot.

[0008] Furthermore, the seedling delivery component includes a seedling delivery platform, a tray delivery impeller, and an impeller drive assembly. The impeller drive assembly is connected to the impeller drive assembly. The seedling delivery platform is provided with an impeller hole. The blades of the tray delivery impeller pass through the impeller hole and are inserted into the pot groove of the seedling tray. The output end of the seedling delivery platform is connected to the input end of the arc-shaped channel.

[0009] Furthermore, the seedling-picking push rod assembly also includes a mounting frame and a push rod sliding seat. The push rod drive assembly includes a return spring, a cam mounting shaft, and a cam. One end of the cam mounting shaft is driven by the roller drive assembly. The push rod sliding seat and the cam mounting shaft are mounted on the mounting frame. The mounting frame is installed inside the seedling-picking roller. The mounting frame shafts at both ends of the mounting frame are fixedly connected to the machine frame. Multiple cams are mounted on the cam mounting shaft. The push rod is sleeved with the return spring and slides against the push rod sliding seat. The cam drives the push rod to reciprocate to push out the potted seedling.

[0010] Furthermore, the push rod drive assembly also includes a rocker arm and a rocker arm pivot shaft. Both ends of the rocker arm pivot shaft are connected to the mounting bracket. One end of the rocker arm is provided with a roller that cooperates with the cam, and the other end is provided with an elongated hole that cooperates with the push rod. The length of the section of the rocker arm pivot shaft connected to the push rod is greater than the length of the section of the rocker arm pivot shaft connected to the roller.

[0011] Furthermore, the outlet end of the seedling ejection channel is connected to a seedling divider hopper, the seedling divider hopper is provided with at least one guide cylinder connected to the planting mechanism, and the cams are installed alternately along the cam mounting shaft; an air blower is connected to the guide cylinder, the air blower is provided with an air inlet, the side wall of the air blower is provided with a circumferential air passage connected to the air inlet, and the bottom of the circumferential air passage is provided with an air inlet for forming a downward accelerating airflow in the guide cylinder.

[0012] Furthermore, the other end of the cam mounting shaft is equipped with an intermittently ordered drive wheel assembly that is sequentially coordinated with the cam mounting shaft. The intermittently ordered drive wheel assembly is mounted on the mounting frame and is driven by the roller drive shaft. The intermittently ordered drive wheel assembly has a driving period and a locking period. When it is in the driving period, the intermittently ordered drive wheel assembly drives a row of pots on the seedling tray to rotate in front of the push rod, and the push rod is stationary. When it is in the locking period, the intermittently ordered drive wheel assembly locks the seedling picking roller, and the cam on the cam mounting shaft sequentially drives the push rod to push the potted seedlings out.

[0013] Furthermore, the intermittently ordered drive wheel assembly includes a pulley assembly and a grooved wheel assembly that cooperate with each other to make the seedling picking roller rotate during the driving period and lock during the stationary period.

[0014] Furthermore, the bottom of the seedling tray is provided with a bottom hole, and the bottom hole is provided with dividing holes around its circumference. The dividing holes are connected to the bottom hole, and the outer diameter of the end of the push rod used to push out the seedling is larger than the diameter of the bottom hole.

[0015] Compared with the prior art, the advantages of the present invention are as follows: This invention creates an arc-shaped channel between the seedling-collecting roller and the pressure plate for transporting seedling trays. This allows the roller drive assembly to simultaneously drive the seedling trays on the roller through the push rods as the roller drives the roller to rotate. The push rod drive assembly then sequentially drives the same row of push rods to eject the seedlings from the trays. The arc-shaped channel allows the trays to bend, enabling the ejected seedlings to fall sequentially. This reduces the need for a transfer device between the planting mechanism and the seedling-collecting device, simplifying the overall structure. Furthermore, ejecting the seedlings via push rods avoids the problem of mechanical arms easily damaging or breaking seedling stems during handling. Attached Figure Description

[0016] The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention. In the drawings: Figure 1 This is an isometric schematic diagram of the seedling collection device disclosed in an embodiment of the present invention; Figure 2 This is a front view schematic diagram of the seedling extraction device disclosed in an embodiment of the present invention; Figure 3 This is a schematic diagram showing the cooperation between the seedling tray rolling conveyor assembly and the seedling picking rod assembly disclosed in an embodiment of the present invention; Figure 4 This is a first isometric schematic diagram of the seedling-picking pole assembly disclosed in an embodiment of the present invention; Figure 5This is a second isometric schematic diagram of the seedling-picking rod assembly disclosed in an embodiment of the present invention; Figure 6 This is an isometric schematic diagram of the pressure plate component disclosed in an embodiment of the present invention; Figure 7 This is a front view schematic diagram of the pressure plate component disclosed in an embodiment of the present invention; Figure 8 This is an isometric schematic diagram of the seedling divider disclosed in an embodiment of the present invention; Figure 9 This is a schematic diagram of the transport and deformation of the seedling tray within the arc-shaped channel as disclosed in an embodiment of the present invention; Figure 10 This is a cross-sectional schematic diagram of the air blower disclosed in an embodiment of the present invention; Figure 11 This is a schematic diagram illustrating the timing coordination of the three sets of top rods and seedling-taking rollers disclosed in an embodiment of the present invention.

[0017] Legend: 1. Rack; 2. Seedling delivery assembly; 21. Seedling delivery platform; 211. Impeller hole; 22. Delivery tray impeller; 221. Blade; 23. Impeller drive assembly; 3. Seedling tray rolling conveyor assembly; 30. Arc-shaped channel; 31. Seedling picking roller; 311. Roller drive shaft; 312. Seedling tray drive rod; 313. Roller end plate; 32. Pressure plate component; 321. Pressure plate rod assembly; 322. Seedling ejection channel; 323. Connecting rod; 324. Clearance channel; 325. Arc-shaped pressure rod; 33. Drive motor; 34. First sprocket and chain assembly; 341. First driving sprocket; 342. First driven sprocket; 343. First chain; 35. Second sprocket and chain assembly; 351. Second driving sprocket; 352. Second driven sprocket; 353. Second chain; 4. Seedling lifting rod assembly; 41. Lifting rod; 42. Lifting rod drive assembly; 43. Mounting bracket; 431. Mounting bracket shaft; 44. Lifting rod sliding seat; 45. Return spring; 46. Cam mounting shaft; 47. Cam; 48. Rocker arm; 49. Rocker arm pivot shaft; 410. Roller; 411. Long strip hole; 5. Seedling divider; 51. Guide tube; 52. Air blower; 53. Air inlet; 54. Circular air passage; 55. Air outlet; 56. Connecting pipe; 6. Intermittently ordered drive pulley assembly; 61. First pulley assembly; 62. Second pulley assembly; 63. First Geneva wheel assembly; 64. Second Geneva wheel assembly; 10. Seedling tray; 101. Pot body trough; 102. Pot body; 103. Bottom hole; 104. Dividing hole. Detailed Implementation

[0018] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0019] like Figure 1-11 As shown in the figure, an embodiment of the present invention discloses a seedling picking device, including a frame 1 and a seedling feeding assembly 2, a seedling tray rolling conveying assembly 3, and a seedling picking top rod assembly 4 mounted on the frame 1. The seedling tray rolling conveying assembly 3 includes a seedling picking roller 31, a roller drive assembly, and a pressure plate 32. The roller drive assembly includes a drive motor 33, a first sprocket and chain assembly 34, and a second sprocket and chain assembly 35. The first sprocket and chain assembly 34 includes a first driving sprocket 341, a first driven sprocket 342, and a first chain 343. The second sprocket and chain assembly 35 includes a second driving sprocket 351, a second driven sprocket 352, and a second chain 353. The drive motor 33 is mounted on the frame 1. The first driving sprocket 341 is mounted on the output shaft of the drive motor 33. The first driving sprocket 341 and the first driven sprocket 342 are driven by the first chain 343, and the second driving sprocket 351 and the second driven sprocket 352 are driven by the second chain 353. An arc-shaped channel 30 for conveying the seedling tray 10 is formed between the seedling-picking roller 31 and the pressure plate component 32. The input end of the arc-shaped channel 30 is connected to the output end of the seedling delivery component 2. The roller drive component drives the seedling-picking roller 31 to drive the seedling tray 10 through the arc-shaped channel 30. The seedling-picking push rod assembly 4 includes multiple push rods 41 and a push rod drive assembly 42. The push rod drive assembly 42 sequentially drives the same row of push rods 41 to sequentially and orderly push out the potted seedlings of the seedling tray 10 located in the arc-shaped channel 30. The potted seedlings either fall into the planting mechanism or into the soil. See also Figure 1 and Figure 9 The seedling tray 10 is conveyed counterclockwise in the arc-shaped channel 30. It enters the arc-shaped channel 30 from the seedling delivery platform 21, and after the potted seedlings are pushed out on the left side of the middle of the arc-shaped channel 30, they fall down, and the empty seedling tray is output on the right side below. The present invention forms an arc-shaped channel 30 for conveying the seedling tray 10 between the seedling picking roller 31 and the pressure plate component 32. Thus, when the roller drive component drives the seedling picking roller 31 to rotate, it can simultaneously drive the seedling tray 10 on the seedling picking roller 31 to pass through the push rod 41. The push rod drive component 42 drives the push rod 41 to push out the potted seedlings in the seedling tray 10. The arc-shaped channel 30 can be bent to facilitate the sequential falling of the potted seedlings in the seedling tray 10 after they are pushed out. This reduces the seedling transfer device (such as rotating seedling cup) between the planting mechanism and the seedling picking device, and simplifies the overall structure. At the same time, the seedling is pushed out of the pot along with the root substrate from the bottom by the push rod 41. After the seedling is pushed out, because the bottom is heavy and the stem and leaves are light, it will fall downwards with the bottom of the seedling facing down under the action of gravity, avoiding the problem of the mechanical arm easily crushing or breaking the seedling stem when picking up the seedling.

[0020] In this embodiment, see Figure 3 and Figure 9 To drive the seedling tray 10, the seedling taking roller 31 includes a roller drive shaft 311, a seedling tray drive rod 312, and a roller end plate 313 connected to both ends of the roller drive shaft 311 and the seedling tray drive rod 312. The roller drive shaft 311 is connected to the roller drive assembly. The seedling tray drive rod 312 is arranged along the outer circumference of the roller drive shaft 311. The seedling tray drive rod 312 is configured to engage with the pot groove 101 of the seedling tray 10 to drive the seedling tray 10 along the arc-shaped channel 30 through the top rod 41. Thus, when the seedling taking roller 31 is driven to rotate, since the seedling tray drive rod 312 is engaged in the pot groove 101 between two adjacent rows of pots 102, when the seedling taking roller 31 rotates, the seedling tray drive rod 312 drives the outer wall of the pot 102, thereby achieving the purpose of driving the seedling tray 10 to rotate counterclockwise.

[0021] In this embodiment, see Figure 6 and 7 To create a constraint on the outside of the seedling taking roller 31, the pressure plate component 32 includes pressure plate rod assemblies 321 arranged on the upper and lower sides of the seedling taking roller 31. A seedling ejection channel 322 is formed between the upper and lower pressure plate rod assemblies 321 for the seedlings to fall after being ejected. The seedling ejection channel 322 is located on the lower left side of the arc-shaped channel 30, so that the seedlings can fall freely after being ejected without being obstructed. The lower pressure plate rod assembly 321 extends arc-shaped towards the outside of the seedling taking roller 31 near the seedling ejection channel 322, forming a funnel-shaped structure to facilitate the connection of the seedling tray 10. The pressure plate rod assembly 321 includes an arc-shaped pressure rod 325 for pressing the seedling tray 10 and a connecting rod 323 for connecting the arc-shaped pressure rod 325. The arc-shaped pressure rod 325 can be in multiple rows and is pressed against the edge of the pot body 102. The connecting rod 323 forms an avoidance channel 324 for avoiding the seedlings. The avoidance channel 324 is similar to a U-shaped groove structure.

[0022] In this embodiment, to feed the seedling tray 10 into the arc-shaped channel 30, the seedling feeding assembly 2 includes a seedling feeding platform 21, a tray feeding impeller 22, and an impeller drive assembly 23. The impeller drive assembly 23 is connected to the tray feeding impeller 22 in a transmission manner. The seedling feeding platform 21 is provided with an impeller hole 211. The blades 221 of the tray feeding impeller 22 pass through the impeller hole 211 and are inserted into the pot groove 101 of the seedling tray 10. The output end of the seedling feeding platform 21 is connected to the input end of the arc-shaped channel 30. When the tray feeding impeller 22 rotates, the blades 221 and the pot groove 101 can have a meshing effect similar to a gear and rack, thereby pushing the seedling tray 10 forward.

[0023] In this embodiment, see Figure 4 and 5To achieve the reciprocating motion of the push rod 41, the seedling-picking push rod assembly 4 also includes a mounting bracket 43 and a push rod sliding seat 44. The push rod drive assembly 42 includes a return spring 45, a cam mounting shaft 46, and a cam 47. One end of the cam mounting shaft 46 is equipped with a second driven sprocket 352 for transmission. The push rod sliding seat 44 and the cam mounting shaft 46 are mounted on the mounting bracket 43. The center hole of the push rod sliding seat 44 is in reciprocating sliding contact with the push rod 41. The mounting bracket 43 is installed inside the seedling-picking roller 31, so that the push rod 41 moves from inside the seedling-picking roller 31. The seedling is pushed outward. The mounting frame shafts 431 at both ends of the mounting frame 43 are fixed to the frame 1. The first driven sprocket 342 and the first driving sprocket 341 are integrally sleeved on the mounting frame shaft 431. The second driven sprocket 352 is installed at one end of the cam mounting shaft 46. Multiple cams 47 are installed on the cam mounting shaft 46. The push rod 41 is sleeved with a return spring 45 and slides with the push rod sliding seat 44. The return spring 45 ensures that the push rod 41 maintains the return tendency. The cams 47 drive the push rod 41 to reciprocate to push out the seedling.

[0024] In this embodiment, in order to achieve a larger ejection stroke of the push rod 41, the push rod drive assembly 42 further includes a rocker arm 48 and a rocker arm pivot shaft 49. Both ends of the rocker arm pivot shaft 49 are connected to the mounting bracket 43. One end of the rocker arm 48 is provided with a roller 410 that cooperates with the cam 47. One end of the return spring 45 abuts against the push rod sliding seat 44, and the other end abuts against the hinge end of the rocker arm 48 and the push rod 41. The other end of the rocker arm 48 is provided with an elongated hole 411 that cooperates with the push rod 41. The elongated hole 411 can compensate for the vertical displacement of the hinge end of the rocker arm 48 and the push rod 41. The length of the section connecting the rocker arm pivot 49 on the rocker arm 48 to the push rod 41 is greater than the length of the section connecting the rocker arm pivot 49 to the roller 410. Therefore, the rocker arm 48, with its rocker arm pivot 49 as the fulcrum, forms a lever structure. The distance from the fulcrum to the connection point with the push rod 41 is greater than the distance from the fulcrum to the end where the roller 410 is mounted. The rocker arm 48 can amplify the stroke relative to the rocker arm pivot 49, thus amplifying the stroke of the push rod 41 and achieving complete ejection of the seedling.

[0025] See Figure 10 The seedling ejection channel 322 is connected to a seedling divider 5, which has two guide tubes 51. In this embodiment, two guide tubes 51 are symmetrically arranged to match the planting mechanism that can plant two rows simultaneously. Cams 47 are installed alternately along the cam mounting shaft 46 so that the push rod 41 sequentially pushes out the seedlings in the same row in the seedling tray 10 and drops them into the guide tubes 51. Thus, the seedlings in the same row can be ejected in a certain sequence. In this application, there are six cams 47 in total, symmetrically divided into two groups, with three on the left corresponding to the left guide tube 51 and three on the right corresponding to the right guide tube 51.

[0026] In this embodiment, the guide cylinder 51 extends downwards, directly approaching the planting soil, thus eliminating the need for a duckbill planting mechanism. An air blower 52 is connected and installed on the guide cylinder 51. Insertion pipes 56, which are inserted and fixed to the guide cylinder 51, are provided at both the upper and lower ends of the guide cylinder 51. The air blower 52 is provided with an air inlet 53, which is connected to an external air source. A circumferential air passage 54, connected to the air inlet 53, is provided on the side wall of the air blower 52. An air inlet 55, used to form a downward accelerating airflow within the guide cylinder 51, is provided at the bottom of the circumferential air passage 54. The air inlet 55 blows air downwards along the circumference of the guide cylinder 51. The downward accelerated airflow can form an adsorption airflow in the air inlet 52, which facilitates the rapid inhalation of the seedlings into the guide cylinder 51. On the other hand, it can also accelerate the downward movement of the seedlings, making their movement controllable and improving planting efficiency. At the same time, it can also prevent the root substrate or soil of the seedlings from clogging the guide cylinder 51. More importantly, by accelerating the seedlings, they can be directly inserted into the soil, allowing them to stand upright on the soil. This can be achieved in conjunction with the trenching and covering mechanism of the transplanter (after trenching, the seedlings can be accelerated and inserted vertically into the trench, and then covered with soil from both sides by the covering mechanism). This reduces the need for planting mechanisms and simplifies the transplanter's operation.

[0027] Optionally, when the guide tube 51 is shorter, it can be connected and adapted to the two duckbill planting mechanisms below. The air blower 52 creates a downward accelerating airflow and negative pressure, accelerating the descent of the seedlings and improving the planting efficiency of the planter. Simultaneously, seedlings in the same row can be retrieved and placed in batches, eliminating the need for a temporary transfer and storage mechanism for the rotating seedling cups. This simplifies the structure and makes it suitable for situations with hard soil requiring transplanting via the duckbill.

[0028] In this embodiment, see 5 and Figure 11The other end of the cam mounting shaft 46 is equipped with an intermittently ordered drive wheel set 6 that is sequentially matched with the cam mounting shaft 46. The intermittently ordered drive wheel set 6 is mounted on the mounting bracket 43 and is driven by the roller drive shaft 311. The working period of the intermittently ordered drive wheel set 6 has a driving period and a locking period. When it is in the driving period (the cam mounting shaft 46 rotates continuously, within a range of about 30° of one revolution of the cam mounting shaft 46), that is, the intermittently ordered drive wheel set 6 drives a row of pots 102 on the seedling tray 10 to rotate. In front of the push rod 41, six rollers 410 engage with the base circle of the cam 47, keeping the push rod 41 stationary. During the locking period (approximately 330° within one rotation of the cam mounting shaft 46), the intermittently and sequentially driven wheel set 6 locks the seedling-taking roller 31. The cam 47 on the cam mounting shaft 46 sequentially drives the push rod 41 to push out the seedlings. Thus, the drive motor 33 of one roller drive assembly simultaneously drives the cam mounting shaft 46 and the seedling-taking roller 31 in a synchronous sequential drive, reducing the need for motors and complex control processes, resulting in a simpler structure. In other words, the cam mounting shaft 46 is constantly rotating, but the seedling tray rotates within a 30° range. The rollers 410 and rocker arm 48 keep the push rod 41 stationary, while the seedling tray remains stationary during the other 330° range, at which point the push rod 41 performs the pushing-out operation.

[0029] Specifically, the intermittently ordered drive wheel assembly 6 includes a pulley assembly and a grooved wheel assembly that cooperate with each other. Specifically, it includes a first pulley assembly 61, a second pulley assembly 62, a first grooved wheel assembly 63, and a second grooved wheel assembly 64. The first pulley assembly 61 drives the first grooved wheel assembly 63 via a belt, the first grooved wheel assembly 63 drives the second grooved wheel assembly 64, and the second grooved wheel assembly 64 drives the second pulley assembly 62 via a belt. The pulley of the second pulley assembly 62 is coaxially driven with the seedling-collecting roller 31, driving the seedling-collecting roller 31 to move forward intermittently. In this embodiment, the pulley assembly and the grooved wheel assembly cooperate to make the seedling-collecting roller 31 rotate during the driving period and lock during the stationary period. The grooved wheel assembly can fix the seedling-collecting roller 31 when not driving, preventing reverse rotation. That is, there are two power transmission routes. One route is that the drive motor 33 drives the cam mounting shaft 46 through the first sprocket and chain assembly 34 and the second sprocket and chain assembly 35, which in turn drives the cam 47, which in turn drives the push rod 41 to extend and retract. The other route is that the cam mounting shaft 46 drives the intermittently ordered drive wheel set 6, which in turn drives the seedling picking roller 31.

[0030] In this embodiment, see Figure 5 and Figure 10Taking a 72-hole seedling tray as an example, six seedlings are planted in a row, divided into three groups. The corresponding push rods 41 of the three groups of seedlings push out the seedlings in sequence, and each group of seedlings is divided to both sides by the seedling divider 5. After a row of seedlings completes the pushing action, the drive motor 33 drives the seedling picking roller 31 to rotate the distance of one row of seedlings, and the next row of seedlings reaches the pushing position. This cycle is repeated to complete the continuous seedling picking work. In order to complete the above movement cycle, the six push rods 41 are paired up on the left and right sides of the middle position of the cam mounting shaft 46, and the two pairs of them move synchronously to form the first group of push rods, the second group of push rods, and the third group of push rods. The operation of the push rods includes extension and retraction, which is driven by six cams 47 arranged on the same cam mounting shaft 46. The cams 47 are paired up on the left and right sides, and the phase difference of the three groups of cams 47 is 120°. Therefore, the entire movement cycle is 360°, that is, the cam mounting shaft 46 rotates once. Since the seedling-picking roller 31 needs to rotate one notch after the cam 47 completes the seedling-lifting action, and the seedling-picking roller 31 remains stationary during the seedling-lifting stage, the resting stage between two adjacent sets of cams 47 is 30°. The movement stage of the seedling-picking roller 31 rotating one notch and the stationary stage of the roller resting stage are realized by setting the intermittent orderly drive wheel set 6. By adjusting the transmission ratio and transmission timing of the intermittent orderly drive wheel set 6, the movement angle of the movement stage of the roller rotating one notch is 22.5°, which is less than 30°. The roller rotates one notch within the common resting time of the first set of push rods, the second set of push rods, and the third set of push rods, which is the distance that the seedling-picking roller 31 rotates to drive one row of seedlings.

[0031] In this embodiment, see Figure 9 In order to push out the roots of the seedlings as a whole, the bottom of the pot body 102 of the seedling tray 10 is provided with a bottom hole 103. Multiple dividing holes 104 are arranged around the bottom hole 103. The dividing holes 104 are elongated and the bottom hole 103 is circular. The dividing holes 104 are connected to the bottom hole 103 and the dividing holes 104 are radiating relative to the bottom hole 103. The outer diameter of the end of the push rod 41 used to push out the seedlings is larger than the diameter of the bottom hole 103. When the push rod 41 moves towards the pot body 102, the bottom of the pot body 102 can shrink and deform inward to form an inward trumpet opening structure, which makes it easy to push out the substrate and roots inside the pot body 102 as a whole.

[0032] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A seedling extraction device, characterized in that, The device includes a frame (1) and a seedling feeding assembly (2), a seedling tray rolling conveyor assembly (3), and a seedling picking push rod assembly (4) mounted on the frame (1). The seedling tray rolling conveyor assembly (3) includes a seedling picking roller (31), a roller drive assembly, and a pressure plate component (32). An arc-shaped channel (30) for conveying the seedling tray (10) is formed between the seedling picking roller (31) and the pressure plate component (32). The input end of the arc-shaped channel (30) is connected to the output end of the seedling feeding assembly (2). The roller drive assembly drives the seedling picking roller (31) to drive the seedling tray (10) through the arc-shaped channel (30). The seedling picking push rod assembly (4) includes multiple push rods (41) and a push rod drive assembly (42). The push rod drive assembly (42) sequentially drives the same row of push rods (41) to sequentially push out the seedlings in the seedling tray (10) located in the arc-shaped channel (30).

2. The seedling extraction device according to claim 1, characterized in that, The seedling roller (31) includes a roller drive shaft (311), a seedling tray drive rod (312), and a roller end plate (313) connected to both ends of the roller drive shaft (311) and the seedling tray drive rod (312). The roller drive shaft (311) is connected to the roller drive assembly. The seedling tray drive rod (312) is arranged along the outer circumference of the roller drive shaft (311). The seedling tray drive rod (312) is configured to engage with the pot groove (101) of the seedling tray (10) to drive the seedling tray (10) to move along the arc-shaped channel (30) and pass through the top rod (41).

3. The seedling extraction device according to claim 2, characterized in that, The pressing plate component (32) includes pressing plate rod assemblies (321) arranged on the upper and lower sides of the seedling taking roller (31). A seedling ejection channel (322) is formed between the pressing plate rod assemblies (321) on the upper and lower sides for the seedlings to fall after being ejected. The pressing plate rod assembly (321) includes an arc-shaped pressing rod (325) for pressing the seedling tray (10) and a connecting rod (323) for connecting the arc-shaped pressing rod (325). The connecting rod (323) forms an avoidance channel (324) for avoiding the seedlings.

4. The seedling extraction device according to claim 3, characterized in that, The seedling delivery assembly (2) includes a seedling delivery platform (21), a tray delivery impeller (22), and an impeller drive assembly (23). The impeller drive assembly (23) is connected to the tray delivery impeller (22) in a transmission connection. The seedling delivery platform (21) is provided with an impeller hole (211). The blades (221) of the tray delivery impeller (22) pass through the impeller hole (211) and are inserted into the pot groove (101) of the seedling tray (10). The output end of the seedling delivery platform (21) is connected to the input end of the arc-shaped channel (30).

5. The seedling extraction device according to any one of claims 3-4, characterized in that, The seedling-picking push rod assembly (4) also includes a mounting frame (43) and a push rod sliding seat (44). The push rod drive assembly (42) includes a return spring (45), a cam mounting shaft (46), and a cam (47). One end of the cam mounting shaft (46) is driven by the roller drive assembly. The push rod sliding seat (44) and the cam mounting shaft (46) are mounted on the mounting frame (43). The mounting frame (43) is installed inside the seedling-picking roller (31). The mounting frame shafts (431) at both ends of the mounting frame (43) are fixed to the frame (1). A plurality of cams (47) are mounted on the cam mounting shaft (46). The push rod (41) is sleeved with the return spring (45) and slides with the push rod sliding seat (44). The cam (47) drives the push rod (41) to reciprocate to push out the seedlings from the pot.

6. The seedling extraction device according to claim 5, characterized in that, The push rod drive assembly (42) also includes a rocker arm (48) and a rocker arm pivot shaft (49). Both ends of the rocker arm pivot shaft (49) are connected to the mounting bracket (43). One end of the rocker arm (48) is provided with a roller (410) that cooperates with the cam (47), and the other end is provided with an elongated hole (411) that cooperates with the push rod (41). The length of the section of the rocker arm pivot shaft (49) on the rocker arm (48) that connects to the push rod (41) is greater than the length of the section of the rocker arm pivot shaft (49) that connects to the roller (410).

7. The seedling extraction device according to claim 5, characterized in that, The seedling ejection channel (322) is connected to a seedling divider (5) at its outlet end. The seedling divider (5) is provided with at least one guide tube (51) connected to the planting mechanism. The cam (47) is installed axially along the cam mounting shaft (46). An air blower (52) is connected to the guide tube (51). An air inlet (53) is provided on the air blower (52). The side wall of the air blower (52) is provided with a circumferential air passage (54) connected to the air inlet (53). The bottom of the circumferential air passage (54) is provided with an air inlet (55) for forming a downward accelerating airflow in the guide tube (51).

8. The seedling extraction device according to claim 5, characterized in that, The other end of the cam mounting shaft (46) is equipped with an intermittently ordered drive wheel set (6) that is in sequence with the cam mounting shaft (46). The intermittently ordered drive wheel set (6) is mounted on the mounting frame (43). The intermittently ordered drive wheel set (6) is driven by the roller drive shaft (311). The intermittently ordered drive wheel set (6) has a driving period and a locking period. When it is in the driving period, the intermittently ordered drive wheel set (6) drives a row of pots (102) on the seedling tray (10) to rotate to the front of the top rod (41), and the top rod (41) is stationary. When it is in the locking period, the intermittently ordered drive wheel set (6) locks the seedling taking roller (31), and the cam (47) on the cam mounting shaft (46) drives the top rod (41) in sequence to push the pot seedling out.

9. The seedling extraction device according to claim 8, characterized in that, The intermittently ordered drive wheel assembly (6) includes a pulley assembly and a grooved wheel assembly that cooperate with each other to make the seedling roller (31) rotate during the driving period and lock during the stationary period.

10. The seedling collection device according to any one of claims 1-4, characterized in that, The bottom of the pot body (102) of the seedling tray (10) is provided with a bottom hole (103), and the bottom hole (103) is provided with a dividing hole (104) around its circumference. The dividing hole (104) is connected to the bottom hole (103), and the outer diameter of the end of the push rod (41) used to push out the seedling is larger than the diameter of the bottom hole (103).

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