Row-column interactive flue-cured tobacco floating tray automatic seedling taking device

Abstract

The invention discloses a row-column interactive flue-cured tobacco floating tray automatic seedling taking device which comprises a rack and a floating seedling raising tray, a lifting mechanism is installed at the top of one side of the rack, a seat rail is installed on the top face of the bottom of the other side of the rack, a guide sliding seat is installed on the seat rail in a rolling mode through balls, and a floating tray support is fixedly installed at the top of the guide sliding seat. A gear and rack transmission mechanism in transmission connection with the guide sliding seat is installed on the machine frame, the floating seedling raising plates are movably installed on a floating plate support, a plate clamping and seedling combing assembly for combing seedlings on the floating seedling raising plates is installed on the floating plate support, and two sets of pushing supports are symmetrically installed on the two sides of the lower portion of the lifting mechanism. An ejector pin is installed on the pushing support close to one side of the floating disc support in a sliding mode, and a cam transmission mechanism in sliding contact with the ejector pin is installed on the pushing support. The size and the weight of the whole machine are reduced, small and light weight of the whole machine is achieved, tobacco seedling damage can be avoided, and the ejection and seedling taking efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery production equipment technology, specifically relating to an automatic seedling picking device for flue-cured tobacco with interactive row and column type floating trays. Background Technology

[0002] Transplanting flue-cured tobacco seedlings under plastic film in Yunnan's tobacco-growing areas is a crucial step in tobacco production. It is currently the mainstream planting technique, achieving water and labor savings while increasing yield. However, in Yunnan's tobacco-growing areas, transplanting is primarily done manually. This manual method is time-consuming and clearly no longer meets the demands of modern tobacco agriculture; mechanization is imperative. Due to the late start of mechanized operations, mechanized tobacco transplanting is currently still in the research and testing phase. In existing technologies, the machinery used for mechanized transplanting of flue-cured tobacco mainly includes two types: manual seedling removal and automatic seedling removal and transplanting. Compared with automatic seedling removal and transplanting, manual seedling removal is still insufficient in terms of transplanting efficiency and labor intensity, and has been gradually replaced by automatic seedling removal devices. Existing automatic seedling removal devices mainly use mechanical fingers to insert and clamp foam floating trays to remove seedlings. Its seedling removal principle is based on the principle of rice transplanting. The mechanical fingers insert, clamp, and retract the tobacco plants, and although the mechanical fingers can remove the tobacco seedlings automatically, there are the following shortcomings in the execution effect: First, the mechanical fingers are prone to damage to the tobacco plants and leaves. Although the mechanical fingers take into account elasticity and flexibility, the movement trajectory of the mechanical fingers and the tobacco plants... The physical properties of tobacco plants and the intertwining of leaves during growth cause significant puncture damage to tobacco plants and leaves during seedling collection, severely impacting the survival rate of transplanted plants. Furthermore, during the retraction of the mechanical fingers, the intertwining of leaves can pull out other plants around the seedling being collected, and the leaves can tear and damage each other, affecting the speed of subsequent automatic transplanting. Secondly, automatic seedling collection devices with mechanical finger structures are large and heavy, making it difficult to turn around in the field. Additionally, the fixed mechanical fingers collect seedlings from floating seedling trays, and the floating trays are fed downwards by an inclined conveyor mechanism, increasing the overall length of the machine and making it inconvenient for use in hilly and mountainous tobacco planting areas. Therefore, the development of a small, lightweight, and interactive automatic seedling collection device for flue-cured tobacco floating trays that improves seedling collection efficiency while preventing the pulling out and damage of seedlings is objectively necessary. Summary of the Invention

[0003] In order to solve the problems in the prior art that seedlings are easily pulled out along with other tobacco plants, and that the seedlings are torn apart and damaged, as well as the large size of the device which is inconvenient for operation in hilly areas, the present invention aims to provide an automatic seedling picking device for flue-cured tobacco floating trays with a small and lightweight structure that can improve seedling picking efficiency and prevent seedlings from being pulled out along with other plants and from being damaged.

[0004] Compared with existing technologies, the automatic seedling picking device for flue-cured tobacco with interactive row and column operation according to the present invention includes a frame and a floating seedling tray. A lifting mechanism is installed on the top of one side of the frame, and a seat rail is installed on the bottom top surface of the other side of the frame. A guide slide is installed on the seat rail by rolling balls. A floating tray bracket is fixedly installed on the top of the guide slide. A gear and rack transmission mechanism connected to the guide slide is installed on the frame. The floating seedling tray is movably installed on the floating tray bracket. A clamping and combing component for combing seedlings in the floating seedling tray is installed on the floating tray bracket. Two sets of push brackets are symmetrically installed on both sides below the lifting mechanism. A push pin is slidably installed on the push bracket near the floating tray bracket. A cam transmission mechanism that slides in contact with the push pin is installed on the push bracket.

[0005] Furthermore, the floating tray support includes a base plate and upright plates. The base plate is installed on the top surface of the guide slide. There are two upright plates, which are vertically and symmetrically installed at both ends of the base plate. On the upright plate near the lifting mechanism, 2 to 3 limiting seats are installed at equal intervals along its vertical direction. The seedling clamping and combing assembly consists of multiple comb teeth, which are installed at equal intervals on the base plate and are positioned opposite to the limiting seats. The floating seedling tray is inserted between the two upright plates, and each row of holes in the floating seedling tray needs to be located between two adjacent comb teeth. Preferably, the comb teeth include a fixed section, an upper connecting section, a lower connecting section, and a combing section. The lower end of the fixed section is suspended, the upper end of the fixed section is connected to one end of the upper connecting section, the other end of the upper connecting section is connected to the upper end of the combing section, the lower end of the combing section is connected to one end of the lower connecting section, and the other end of the lower connecting section is fixedly connected to the bottom of the base plate. The length of the upper connecting section is less than the length of the lower connecting section, and the length of the fixed section is less than the length of the combing section. The upper connecting section is connected to the fixed section and the combing section, and the lower connecting section is connected to the combing section by a rounded transition. The fixed section, the upper connecting section, the lower connecting section, and the combing section are all made of elastic steel wire. The limiting card seat has an L-shaped structure and includes a connecting plate and a limiting plate. The connecting plate is installed on the outside of the upright plate, and the limiting plate is installed vertically on the connecting plate and is arranged opposite to the clamp combing assembly.

[0006] Furthermore, the lifting mechanism includes a lifting stepper motor, a lifting screw, and a lifting slider. An upper connecting frame is mounted on the top of the frame, and a lifting slider and two lifting bases are mounted on the bottom of the frame. The lifting screw is installed between the upper connecting frame and the lifting slider, and the two lifting bases are respectively installed on both sides of the lifting slider. Two sets of push-up brackets are respectively fixedly connected to the upper ends of the two lifting bases. The lifting stepper motor is mounted above the upper connecting frame and is driven by the upper end of the lifting screw. A lifting guide rail is installed parallel and vertically on the frame on the side away from the float support. The lifting sliders of the two sets of push-up brackets, driven by the screw, are mounted on the lifting guide rail.

[0007] Furthermore, the gear and rack transmission mechanism includes a drift plate feed stepper motor, a feed gear, and a feed rack. The drift plate feed stepper motor is mounted on the frame, the feed gear is mounted on the output shaft of the drift plate feed stepper motor, and the feed rack is mounted on one side of the drift plate support. The feed rack and the feed gear mesh with each other.

[0008] Furthermore, the cam transmission mechanism includes a pusher stepper motor and a pusher cam. The pusher stepper motor is mounted on a pusher bracket, and the pusher cam is mounted on the output shaft of the pusher stepper motor. A pusher rod is installed at the end of the ejector pin near the pusher cam, and a pusher plate is installed on the top of the pusher rod, which slides in contact with the pusher cam. An elastic element is installed on the pusher rod between the pusher plate and the ejector pin.

[0009] Furthermore, the frame includes a bottom frame and a side frame that is vertically mounted on one side of the bottom frame.

[0010] Compared with existing technologies, the advantages of this invention are as follows: First, this device optimizes the structure of the seedling-taking mechanism. The floating seedling tray is transported using a gear and rack transmission mechanism, and the seedling taking is achieved by two sets of cam transmission mechanisms driving corresponding pins to push the seedlings out from the back of the floating seedling tray. The unique design, mainly based on the rows of floating seedling trays, with the intermittent up-and-down movement of the pins and the intermittent back-and-forth movement of the seedling trays, not only improves the efficiency of seedling taking but also greatly reduces the size of the automatic seedling taking device, reducing the overall volume and weight, achieving a small and lightweight design. This solves the problem that current automatic tobacco seedling taking and transplanting machines are large and heavy, making them inconvenient for tobacco planting in hilly and mountainous areas. This device is also suitable for transplanting tobacco seedlings in hilly and mountainous areas. Firstly, this device effectively improves its adaptability. Secondly, it features a clamping and combing component on the floating tray support. This component secures the floating seedling tray to the support, preventing it from moving during seedling extraction and affecting efficiency. It also combs the tobacco seedlings in a row, preventing tangling or tearing. This ensures that when the needle extracts seedlings from the back of the tray, the leaves are not damaged due to tangling or tearing, and surrounding seedlings are not extracted together. This significantly improves extraction accuracy and efficiency. The device is compact, lightweight, efficient, and adaptable, making it easy to promote and use. Attached Figure Description

[0011] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a side view schematic diagram of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the structure of the floating tray support 5 and the clamping tray seedling combing assembly 6 mounted on the guide slide 4 in this invention. Figure 5 This is a front view schematic diagram of the floating seedling tray 2 installed on the floating tray support 5 in this invention; Figure 6 This is a front sectional view of the floating seedling tray 2 mounted on the floating tray support 5 in this invention; Figure 7 This is a right-side schematic diagram of the floating seedling tray 2 mounted on the floating tray support 5 in this invention; Figure 8 This is a schematic diagram of the structure of the clamping and combing seedling assembly 6 in this invention. In the diagram: 1-Frame, 2-Floating seedling tray, 3-Rack rail, 4-Guide slide, 5-Floating tray bracket, 51-Base plate, 52-Upright plate, 53-Connecting plate, 54-Limiting plate, 6-Clamping tray combing assembly, 61-Fixing section, 62-Upper connection, 63-Combing section, 64-Lower connection section, 7-Pushing bracket, 8-Push pin, 9-Lifting stepper motor, 10-Lifting screw, 11-Lifting slider, 12-Upper connecting frame, 13-Lifting base, 14-Lifting guide rail, 15-Floating tray feed stepper motor, 16-Feed gear, 17-Feed rack, 18-Pushing stepper motor, 19-Pushing cam, 20-Auxiliary rod, 21-Pushing plate, 22-Elastic component. Detailed Implementation

[0012] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this does not limit the present invention in any way. Any changes or substitutions made based on the teachings of the present invention are within the protection scope of the present invention.

[0013] like Figures 1-7 As shown, this device includes a frame 1 and a floating seedling tray 2. The floating seedling tray 2 is a foam floating tray used in the prior art. A lifting mechanism is installed on the top of one side of the frame 1, and a base rail 3 is installed on the bottom top surface of the other side of the frame 1. A guide slide 4 is mounted on the base rail 3 by ball bearings. A floating tray support 5 is fixedly installed on the top of the guide slide 4. A gear and rack transmission mechanism is installed on the frame 1 and is connected to the guide slide 4. The gear and rack transmission mechanism can drive the guide slide 4 to slide back and forth along the base rail 3. During the sliding of the guide slide 4, it can drive the floating tray support 5 and the floating seedling tray to move synchronously. The floating seedling tray 2 is movably mounted on the floating tray support 5. A clamping and combing component 6 for combing seedlings in the floating seedling tray 2 is installed on the floating tray support 5. The clamping and combing component 6 can clamp and fix the floating seedling tray 2 to the floating tray support. On the frame 5, to prevent the floating seedling tray 2 from moving when the thimble 8 is picking up the seedlings, thus affecting the alignment of the thimble with the hole, the clamping tray combing component 6 can comb the tobacco seedlings on the floating seedling tray 2 in a row to prevent the tobacco seedlings from tangling or tearing each other. This allows the thimble 8 to pick up the seedlings from the back of the floating seedling tray 2 without the tobacco leaves from tangling or tearing each other, thus preventing damage to the tobacco seedling leaves and preventing the phenomenon of surrounding tobacco seedlings being picked up together. This can effectively improve the accuracy of picking up the seedlings. Two sets of pushing brackets 7 are symmetrically installed on both sides below the lifting mechanism. The lifting mechanism can drive the pushing brackets 7 to move up and down back and forth. The thimble 8 is slidably installed on the pushing bracket 7 on the side closer to the floating tray support 5. The pushing bracket 7 is equipped with a cam transmission mechanism that slides in contact with the thimble 8. The cam transmission mechanism can drive the thimble to intermittently push out and retract.

[0014] Furthermore, the floating tray support 5 includes a base plate 51 and upright plates 52. The base plate 51 is mounted on the top surface of the guide slide 4. Two upright plates 52 are vertically and symmetrically mounted at both ends of the base plate 51. On the upright plate near the lifting mechanism, 2-3 equidistant positioning brackets are installed along its vertical direction. The seedling clamping assembly 6 consists of multiple seedling comb teeth, which are equidistantly mounted on the base plate 51 and positioned opposite the positioning brackets. The floating seedling tray 2 is inserted between the two upright plates 52 and floats. Each row of holes in the seedling tray 2 needs to be located between two adjacent comb teeth. After the floating seedling tray 2 is inserted between the two upright plates 52, the limiting seat can limit the back of the floating seedling tray 2, and the multiple equally spaced comb teeth can limit the front of the floating seedling tray 2, so that the floating seedling tray 2 is located between the limiting seat and the multiple comb teeth. This can prevent the floating seedling tray 2 from moving or tilting when the ejector pin 8 pushes out to pick up the seedlings from the back, and can ensure the precise positioning of the ejector pin 8 and the holes on the floating seedling tray 2, which is beneficial to improving the seedling picking efficiency. Preferably, the comb teeth include a fixed section 61, an upper connecting section 62, a lower connecting section 64, and a combing section 63. The lower end of the fixed section 61 is suspended, the upper end of the fixed section 61 is connected to one end of the upper connecting section 62, the other end of the upper connecting section 62 is connected to the upper end of the combing section 63, the lower end of the combing section 63 is connected to one end of the lower connecting section 64, and the other end of the lower connecting section 64 is fixedly connected to the bottom of the base plate 51. The length of the upper connecting section 62 is less than the length of the lower connecting section 64. The length of section 1 is less than the length of section 63. The upper connecting section 62 is connected to the fixed section 61 and section 63, and the lower connecting section 64 is connected to section 63 by a rounded transition. The fixed section 61, upper connecting section 62, lower connecting section 64 and section 63 are all made of elastic steel wire. The limiting card seat has an L-shaped structure. The limiting card seat includes a connecting plate 53 and a limiting plate 54. The connecting plate 53 is installed on the outside of the upright plate 52. The limiting plate 54 is installed vertically on the connecting plate 53 and is arranged opposite to the clamping plate combing assembly 6.Since the length of the upper connecting section 62 is less than the length of the lower connecting section 64, the distance between the combing section 63 and the limiting seat gradually increases from top to bottom. When the floating seedling tray 2 is inserted downward from the top of the upright plate 52, the combing section 63 enters from between the holes in each row at the bottom of the floating seedling tray 2. As the floating seedling tray 2 moves downward, the combing section 63 combs the tobacco leaves between the rows, separating the tobacco leaves that are pulling each other apart, so as to avoid damage and seedling loss when the jacking needle 8 pushes out the seedlings. When the floating seedling tray is inserted into the surface of the bottom plate 51, the limiting plate 54 positions the back of the floating seedling tray 2, and the fixing section 61 positions the front of the floating seedling tray 2. The floating seedling tray is movably clamped between the fixing sections 61 of the limiting plate 54, which can prevent movement and effectively improve the accuracy and efficiency of pushing out the seedlings.

[0015] Furthermore, the lifting mechanism includes a lifting stepper motor 9, a lifting screw 10, and a lifting slider 11. The lifting stepper motor 9 is a structure used in the prior art, and finished products can be directly purchased according to the power required. An upper connecting frame 12 is installed on the top of the frame 1, and a lifting base 13 is installed on the bottom of the frame 1. The lifting screw 10 is rotatably installed between the upper connecting frame 12 and the lifting slider 11, and the two sides of the lifting slider 11 are fixedly connected to two sets of lifting bases 13 and push brackets 7. The lifting stepper motor 9 is installed above the upper connecting frame 12 and is connected to the upper end of the lifting screw 10 for transmission. In use, the lifting stepper motor 9 is turned on to rotate in both directions, and the lifting stepper motor 9 drives the transmission screw 10 to rotate. During the rotation of the transmission screw 10, the lifting slider 11 will move up and down on the lifting screw 10. During the up and down movement of the lifting slider 11, the push brackets 7 on both sides can move up and down synchronously, thereby realizing the up and down movement of the ejector pin 8. Preferably, in order to ensure that the pusher bracket 7 always moves in a straight line during the up and down movement and to prevent deviation during the movement, a lifting guide rail 14 is installed vertically on the frame 1 on the side away from the float plate bracket 5. The two sets of pusher brackets are installed on the lifting guide rail 14 through the lifting slider 11 driven by the screw. During the movement, the pusher bracket 7 can always maintain a straight line along the lifting guide rail 14. The structure of the pusher bracket 7 is not unique. As long as it is small and lightweight, it is fine as long as it is easy to install the cam transmission mechanism and the ejector pin 8.

[0016] Furthermore, the gear and rack transmission mechanism includes a float plate feed stepper motor 15, a feed gear 16, and a feed rack 17. The float plate feed stepper motor 15 is mounted on the frame 1. The float plate feed stepper motor 15 is a structure used in the prior art, and finished products can be directly purchased according to the power required. The feed gear 16 is mounted on the output shaft of the float plate feed stepper motor 15. The feed rack 17 is mounted on one side of the guide slide 4. The feed rack 17 and the feed gear 16 mesh with each other. When it is necessary to control the movement of the float plate support 5, the float plate feed stepper motor 15 is turned on to rotate in both directions. The float plate feed stepper motor 15 drives the feed gear 16 to rotate. The rotation of the feed gear 16 will drive the feed rack 17 to move. The movement of the feed rack 17 can drive the float plate support 5, the floating seedling tray 2, and the guide slide 4 to move synchronously along the seat rail 3, thereby realizing the reciprocating movement of the floating seedling tray 2.

[0017] Furthermore, the cam transmission mechanism includes a push-up stepper motor 18 and a push-up cam 19. The push-up stepper motor 18 is a structure used in the prior art, and a finished product can be directly purchased according to the power required. The push-up stepper motor 18 is mounted on the push-up bracket 7, and the push-up cam 19 is mounted on the output shaft of the push-up stepper motor 18. A push rod 20 is installed at the end of the ejector pin near the push-up cam 19. A push plate 21 is installed on the top of the push rod 20. The push plate 21 slides in contact with the push-up cam 19. An elastic element 2 is installed on the push rod 20 between the push plate 21 and the ejector pin 8. 2. When it is necessary to remove the tobacco seedlings, turn on the push-top stepper motor 18. The push-top stepper motor 18 drives the push-top cam 19 to rotate. During the rotation of the push-top cam 19, it contacts the push-top plate 21. After the push-top plate 21 is subjected to the force of the push-top cam 19, it will push the push pin 8 towards the floating seedling tray 2 through the push rod 20. At the same time, it compresses the elastic element 22. The push pin 8 can push the tobacco seedling out from the back of the floating seedling tray 2 using its own thrust. After the tobacco seedling is pushed out, the push pin 8 returns to its original position under the joint action of the elastic element 22, the push-top cam 19 and the push-top plate 21. Preferably, the elastic element 22 is a spring.

[0018] The structure of the frame 1 can be determined according to the actual structure of the transplanter. The structure of the frame 1 is not unique. In order to achieve the characteristics of small size and light weight of the device, the frame 1 includes a bottom frame and a side frame that is vertically installed on one side of the bottom frame.

[0019] The working process of this device is as follows: the number of rows and columns of the floating seedling tray 2 are both even numbers, and the number of holes in each row and column is also even. In this embodiment, a floating seedling tray 2 with 10 rows × 20 columns and 200 holes is used as an example. Before the device is operated, the floating seedling tray 2 is inserted into the floating tray support 5 from top to bottom according to the positioning point. The seedling clamping and combing component 6 on the floating tray support 5 clamps the floating seedling tray 2 tightly onto the floating tray support 5. At the same time, the seedling clamping and combing component 6 also combs the tobacco seedling leaves on the floating seedling tray 2 in a column direction, so that the leaves of each column of tobacco seedlings will not be tangled together, which makes it easier for the tobacco seedlings to fall into the transplanter after being pushed out. After the floating seedling tray 2 is clamped and fixed, the push pin 8 installed on the push support 7 (according to...) Figure 1 and Figure 2 As shown, there are two holes (front and back) that are aligned with the two rear holes (row 1, column 1 and row 1, column 11) of the bottom row (counting from bottom to top, the bottom is row 1 and the top is row 10) of the floating seedling tray 2. During this process, the holes of the floating seedling tray 2 are divided into front and rear sections (counting from front to back, columns 1 to 10 are the front section, and columns 11 to 20 are the rear section). When working, the front pin 8 is responsible for pushing the holes in the front section, and the rear pin 8 is responsible for pushing the holes in the rear section. The pushing step is initiated. When the feed motor 18 rotates once, it drives the two push cams 19 to rotate once. The two push cams 19 drive the corresponding front and rear pins 8 to complete one push and return action, thus pushing out the tobacco seedlings in the corresponding two holes and letting them slide into the corresponding transplanters, realizing the removal of tobacco seedlings in one operation. When the tobacco seedlings in the holes of the first row and first column and the first row and eleventh column are removed, after the pins 8 return to their original positions, the floating plate feed stepper motor 15 rotates once, driving the feed gear 16 to rotate once, and through the feed gear 16 meshing with it, the feed... The 17 teeth drive the float tray support 5 and guide slide 4 to move forward one column spacing (hole spacing) along the seat rail 3, thereby causing the floating seedling tray 2 mounted on the float tray support 5 to also move forward one hole spacing, so that the next two holes (the second hole in the first row and the twelfth hole in the first row) are aligned with the front and rear push pins 8 respectively. The push stepper motor 18 then works again to perform the second push-up seedling removal. This cycle continues until the seedlings in the first row (the bottom row) are removed, at which point the float tray feed stepper motor 15 automatically reverses its operation, moving the float tray support 5 and... The guide slide 4 is sent back to the starting feed position along the seat rail 3, and then the lifting stepper motor 9 is controlled to work (stop after one rotation). The lifting slider 11 is used to lift the pusher bracket 7 and the pusher pin 8 upward by one hole distance, so that the front and rear pushers 8 are aligned with the holes in the first and eleventh columns of the second row, respectively. The second row of tobacco plants can be pushed and picked up in the above manner. Finally, the continuous cycle of working from front to back and from bottom to top is continued until all the tobacco plants in 10 rows × 20 columns and 200 holes are automatically picked up.

[0020] This device can be configured and installed on both single-row and double-row tobacco transplanters. The installation location can be appropriately modified and arranged according to the specific structure of the transplanter. When used on a single-row transplanter, this device is set to a single mode where the single pusher 8 works sequentially. According to the above orientation description, the rear pusher stepper motor 18 is stopped, and the front pusher stepper motor 18 is controlled to work intermittently. In conjunction with the lifting stepper motor 9, the lifting slider 11, the pusher support 7, and the pusher 8 are lifted upwards intermittently. The floating plate feed stepper motor 15 drives the floating plate support 5 and the floating seedling tray 2 above it to move forward intermittently. The front pusher 8 works first, pushing out seedlings from front to back and from bottom to top in its assigned area (row 1, column 1 to row 10 → return to position → row 2, column 1 to row 2, column 10 → return to position → repeat action... row 10, column 10) and dropping them into the transplanter column by column until the seedlings in the first half of the area are removed. At this time, the lifting stepper motor 9 continuously reverses, lowering the lifting slider 11, the pusher bracket 7, and the pusher pin 8 to their lowest positions. The pusher pin 8 also lowers to its lowest position (aligning the rear pusher pin 8 with the holes in the 1st row, 20th column of the floating seedling tray 2). At this time, the front pusher stepper motor 18 stops working, while the rear pusher stepper motor 18 works intermittently. In conjunction with the forward rotation of the lifting stepper motor 9, the lifting slider 11, the pusher pin 8, and the pusher bracket 7 are intermittently fed forward. The floating tray feed stepper motor 15 reverses, driving the floating tray bracket 5 and the floating seedling tray 2 above it to intermittently retreat. At this time, the rear pusher pin 8 works, returning to its assigned area (1st row, 20th column to 1st row, 11th column → return to position → 2nd row, 20th column to 2nd row, 11th column). →Return to position→Repeat the action......10th row, 20th column) Take seedlings from back to front and from bottom to top, column by column and row by row, and place them into the transplanter for transplanting until the seedlings in the second half of the area are taken. Finally, the lifting stepper motor 9 continuously reverses to lower the lifting slider 11, the pusher bracket 7, and the pusher pin 8 to the lowest position, thus completing the automatic seedling taking of a tray of seedlings. Finally, remove the empty floating seedling tray 2 from the floating tray bracket 5, and insert the new full floating seedling tray 2 into the floating tray bracket 5 according to the positioning point (at this time, the front pusher pin 8 is aligned with the hole in the first row, first column of the floating seedling tray 2, and the rear pusher pin 8 is aligned with the hole in the first row, 11th column of the floating seedling tray 2). Start the control system to automatically take and transplant the next tray of seedlings.

[0021] On the double-ridge transplanter, this device is set to a dual mode in which both pins 8 work simultaneously, and the implementation process is as described above in the process of the two pins 8 working synchronously.

Claims

1. A row-and-column interactive automatic tobacco seedling picking device, characterized in that: The device includes a frame (1) and a floating seedling tray (2). A lifting mechanism is installed on the top of one side of the frame (1), and a seat rail (3) is installed on the bottom top surface of the other side of the frame (1). A guide slide (4) is installed on the seat rail (3) by rolling balls. A floating tray bracket (5) is fixedly installed on the top of the guide slide (4). A gear and rack transmission mechanism that is connected to the guide slide (4) is installed on the frame (1). The floating seedling tray (2) is movably installed on the floating tray bracket (5). A clamping and combing assembly (6) for combing seedlings in the floating seedling tray (2) is installed on the floating tray bracket (5). Two sets of push brackets (7) are symmetrically installed on both sides below the lifting mechanism. A push pin (8) is slidably installed on the push bracket (7) near the floating tray bracket (5). A cam transmission mechanism that slides in contact with the push pin (8) is installed on the push bracket (7).

2. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 1, characterized in that: The floating tray support (5) includes a base plate (51) and a vertical plate (52). The base plate (51) is installed on the top surface of the guide slide (4). There are two vertical plates (52), which are vertically and symmetrically installed at both ends of the base plate (51). Two to three limiting seats are installed at equal intervals along the vertical direction on the vertical plate near the lifting mechanism. The seedling clamping assembly (6) is composed of multiple seedling comb teeth. The seedling comb teeth are installed at equal intervals on the base plate (51) and are opposite to the limiting seats. The floating seedling tray (2) is inserted between the two vertical plates (52), and each row of holes in the floating seedling tray (2) needs to be located between two adjacent seedling comb teeth.

3. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 2, characterized in that: The comb teeth include a fixed section (61), an upper connecting section (62), a lower connecting section (64), and a combing section (63). The lower end of the fixed section (61) is suspended in the air. The upper end of the fixed section (61) is connected to one end of the upper connecting section (62). The other end of the upper connecting section (62) is connected to the upper end of the combing section (63). The lower end of the combing section (63) is connected to one end of the lower connecting section (64). The other end of the lower connecting section (64) is connected to the base plate (51). The bottom is fixedly connected, the length of the upper connecting section (62) is less than the length of the lower connecting section (64), the length of the fixed section (61) is less than the length of the combing section (63), the upper connecting section (62) is connected to the fixed section (61) and the combing section (63) and the lower connecting section (64) is connected to the combing section (63) by a rounded transition, and the fixed section (61), the upper connecting section (62), the lower connecting section (64) and the combing section (63) are all made of elastic steel wire.

4. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 2, characterized in that: The limiting card seat has an L-shaped structure. The limiting card seat includes a connecting plate (53) and a limiting plate (54). The connecting plate (53) is installed on the outside of the upright plate (52). The limiting plate (54) is installed vertically on the connecting plate (53) and is arranged opposite to the clamping plate combing assembly (6).

5. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 1, characterized in that: The lifting mechanism includes a lifting stepper motor (9), a lifting screw (10), and a lifting slider (11). An upper connecting frame (12) is installed on the top of the frame (1), and a lifting slider (11) and two lifting bases (13) are installed on the bottom of the frame (1). The lifting screw (10) is installed between the upper connecting frame (12) and the lifting slider (11). The two lifting bases (13) are respectively installed on both sides of the lifting slider (11). Two sets of push-top brackets (7) are respectively fixedly connected to the upper ends of the two lifting bases (13). The lifting stepper motor (9) is installed above the upper connecting frame (12) and is connected to the upper end of the lifting screw (10) for transmission.

6. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 5, characterized in that: A lifting guide rail (14) is installed vertically on the frame (1) on the side away from the floating plate support (5). Two sets of push-top supports (7) are installed on the lifting guide rail (14) through the lifting slider (11) driven by the screw.

7. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 1, characterized in that: The gear and rack transmission mechanism includes a drift plate feed stepper motor (15), a feed gear (16) and a feed rack (17). The drift plate feed stepper motor (15) is mounted on the frame (1). The feed gear (16) is mounted on the output shaft of the drift plate feed stepper motor (15). The feed rack (17) is mounted on one side of the guide slide (4). The feed rack (17) meshes with the feed gear (16).

8. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 1, characterized in that: The cam transmission mechanism includes a push stepper motor (18) and a push cam (19). The push stepper motor (18) is mounted on the push support (7), and the push cam (19) is mounted on the output shaft of the push stepper motor (18). A push rod (20) is installed at the end of the ejector pin near the push cam (19). A push plate (21) is installed on the top of the push rod (20). The push plate (21) slides in contact with the push cam (19). An elastic element (22) is installed on the push rod (20) between the push plate (21) and the ejector pin (8).

9. The automatic seedling picking device for row-column interactive flue-cured tobacco floating trays according to claim 8, characterized in that: The elastic element (22) is a spring.

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