Industrialized tobacco seedling raising tray

Abstract

The invention discloses a factory tobacco seedling raising tray which comprises a rack and is characterized in that a return type seed filling device is arranged on the rack and comprises a seed plate fixer, a seed storage device, a fixed seed filling plate and a movable seed metering plate, the centers of the two ends of the rack are rotationally connected with center shafts at the two ends of a seed plate fixer through bearings respectively, the seed plate fixer is driven by a rotary swing power device, and the rotary swing power device is mounted on the rack; a seed storage device is arranged on one side of the seed plate fixer, a fixed seed filling plate and a movable seed metering plate are arranged in the seed plate fixer, and the movable seed metering plate is arranged on the lower side of the fixed seed filling plate. The invention relates to the technical field of tobacco planting equipment, in particular to a factory tobacco seedling raising tray which realizes filling and accurate putting of single seeds through a circulating and rotating movement mechanism and has a function of automatically filling the seeds through a fixed seed filling plate and a movable seed filling plate.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco planting equipment, in particular to a factory-based tobacco seedling tray. Background Art

[0002] In tobacco cultivation technology, the seedling stage is an important link to ensure the quality and yield of the final tobacco product. The success of seedling cultivation is directly related to the health of the tobacco plants and their subsequent growth and development. As the initial step in the seedling process, the precision and uniformity of sowing are essential to the cultivation of strong and consistent seedlings. At present, the two precision sowing methods commonly used in the tobacco planting industry are mechanical direct sowing and the use of seedling trays for seedling cultivation and then transplanting. Although the mechanical direct sowing method is favored for its labor-saving, cost-reducing and high efficiency, it also exposes defects such as inconsistent seedling growth, low seedling rate and reduced final yield. In contrast, the use of seedling cultivation

[0003] The method of sowing in trays and then transplanting can significantly increase tobacco yields, while reducing the amount of seeds used and making rational and efficient use of limited land resources.

[0004] In the process of factory-based tobacco seedling cultivation, the seed filling device is the core component for achieving automated sowing. Traditional seed filling devices often have the following problems:

[0005] Low degree of automation: Many seed filling devices still require manual participation and cannot be fully automated, resulting in low efficiency.

[0006] The sowing accuracy is not high: Due to the limitation of equipment design, the distribution of seeds is uneven during sowing, which affects the quality of seedling cultivation.

[0007] Complex operation: Some seed filling devices are complex to operate and require professional personnel to operate and maintain, which increases the threshold for use.

[0008] Seed waste: During the sowing process, unreasonable equipment design may lead to seed waste and increase costs.

[0009] Difficult to adjust: Faced with seeds of different sizes and shapes, traditional seed filling devices are difficult to adjust quickly and have poor adaptability.

[0010] In order to solve at least part of the above problems and improve the efficiency and quality of factory tobacco seedling cultivation, it is necessary to develop a new type of return-type seed filling device. Summary of the invention

[0011] The technical problem to be solved by the present invention is to provide a factory-based tobacco seedling tray, which realizes the filling and precise placement of single seeds through the composite movement of translation and rotation, and has the function of automatic seed filling through a fixed seed filling plate and a movable seed filling plate.

[0012] A factory-based tobacco seedling tray, comprising a frame, characterized in that: a return-type seed filling device is arranged on the frame, the return-type seed filling device comprises a seed plate holder, a seed storage device, a fixed seed filling plate and a movable seed discharge plate, the centers of both ends of the frame are respectively connected to the center shafts of both ends of the seed plate holder through bearings, the seed plate holder is driven by a rotary swing force device, and the rotary swing force device is installed on the frame;

[0013] A seed storage device is provided at one side of the seed plate holder, and a fixed seed filling plate and a movable seed discharging plate are provided in the seed plate holder, the movable seed discharging plate is provided at the lower side of the fixed seed filling plate, the fixed seed filling plate is fixed to the inner wall of the seed plate holder, the movable seed discharging plate is slidably provided inside the seed plate holder, the movable seed discharging plate cooperates with a return drive device, and the return drive device is installed on the frame.

[0014] As a further limitation of the present technical solution, a plurality of discharge channels are arranged on one side of the seed plate fixture, a limit plate and a seed groove are arranged on the fixed seed filling plate, a plurality of pairs of inclined limit plates are fixed on the fixed seed filling plate, each pair of the limit plates forms a V-shaped groove with the fixed seed filling plate, the discharge channel corresponds to the V-shaped groove and is connected thereto, the discharge channel and the V-shaped groove have the same shape, the distance between the upper sides of each pair of the limit plates is greater than the distance between the lower sides, a plurality of evenly arranged seed grooves are arranged on the fixed seed filling plate, and the seed grooves are arranged between each pair of the limit plates.

[0015] As a further limitation of the present technical solution, the movable seed plate is provided with a plurality of circular openings, the circular openings have the same diameter as the seed slot, the circular openings can be coaxial with the seed slot, a slider is fixed to one end of the movable seed plate, and the slider can pass through a slide groove opened at one end of the seed plate fixture.

[0016] As a further limitation of the present technical solution, the seed storage device includes an L-shaped support seat and a plurality of evenly arranged V-shaped blocks, the V-shaped blocks are evenly fixed on the horizontal plate of the L-shaped support seat, one side of the horizontal plate of the L-shaped support seat is fixedly connected to one side of the seed plate holder, the horizontal plate of the L-shaped support seat is inclined, the vertical plate of the L-shaped support seat is perpendicular to the ground, the angle between the horizontal plate of the L-shaped support seat and the ground is 8-15 degrees, and V-shaped seed storage grooves are formed between adjacent V-shaped blocks, and the V-shaped seed storage grooves and the discharge channels are arranged one by one.

[0017] As a further limitation of the technical solution, the movable seeding plate is provided with a plurality of groups of evenly arranged circular magnet sheets, and the circular magnet sheets are arranged in an array to form a magnet sheet array, which can push or pull the movable seeding plate step by step by accurately controlling the power-on and power-off sequence and time of the circular magnet sheets;

[0018] In the initial state, all the circular magnets are not powered. First, the first group of circular magnets are powered on to attract the movable seeding plate to move and push the movable seeding plate to move a short distance. Then the power supply of the first group of circular magnets is disconnected to release the movable seeding plate. Then the second group of circular magnets are powered on to continue to push the movable seeding plate to move.

[0019] Each group of circular magnets is turned on and off in sequence to gradually realize the translational movement of the movable seed plate. During the movement, the circular opening and the seed slot are displaced to be coaxial. When the circular opening and the seed slot are coaxial, the seeds can fall into the seed slot.

[0020] As a further limitation of the present technical solution, the rotary and swinging force device is a stepper motor, the stepper motor is fixed to one end of the frame, and the output shaft of the stepper motor is fixedly connected to the central axis of one end of the seed plate holder.

[0021] As a further limitation of the technical solution, the return drive device is an electric cylinder, the telescopic rod of the electric cylinder is arranged corresponding to the slider, and the telescopic rod of the electric cylinder can realize the movement of the movable seed plate in the seed plate holder by pushing the slider.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] (1) The rotary swing force device can drive the return type seed filling device to rotate back and forth, thereby driving the seed plate holder, the movable seed discharge plate and the fixed seed filling plate to swing back and forth. The movable seed discharge plate can slide inside the seed plate holder, and the seeds can pass through the discharge channel into the V-shaped groove, and then fall into the seed groove during the reciprocating rotation of the fixed seed filling plate.

[0024] (2) The V-shaped seed storage tank is used to store tobacco seeds. The angle between the two sides of the V-shaped seed storage tank is 20°-40°, the length of the V-shaped seed storage tank is 45-50 mm, the cross-section of the V-shaped seed storage tank is a contraction type groove, the contraction angle is 10°-20°, and the notch near one end of the seed plate holder is smaller, so that the seeds are not easy to jump out when the seed filling plate is fixed to discharge the seeds. After the seed discharge process is completed, the seeds can be recovered into the V-shaped seed storage tank again;

[0025] (3) The movable seeding plate and the return drive device are electromagnetically coordinated. The return drive device is an electric cylinder. The return drive device is fixed to the other end of the frame. When the electric cylinder is energized, the movable seeding plate can drive the slider to move under the action of the circular magnet sheet. The slider can move along the slide groove until the circular opening is coaxial with the seed groove, so that the seeds fall into the seed groove;

[0026] (4) In the initial position (i.e., when the electric cylinder is not powered), the circular opening and the seed slot do not correspond. When the seed filling is completed, the return drive device is started. Under the adsorption action of the electric cylinder, the circular opening and the seed slot are coaxial. At this time, the tobacco seeds will fall into the seedling tray through the circular opening to complete the sowing. It can be realized that the seeds are filled first, and after completion, the excess seeds are collected and then the seeds are sown, thereby avoiding seed waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 ;

[0030] Figure 3 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 ;

[0031] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle A;

[0032] Figure 5 The third diagram is a partial three-dimensional structure diagram of the present invention;

[0033] Figure 6 The fourth diagram is a partial three-dimensional structure diagram of the present invention;

[0034] Figure 7 The three-dimensional structure of the present invention is shown in FIG. Figure 2

[0035] Figure 8 It is a partial side view of the present invention.

[0036] Fig. 9 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 5 ;

[0037] Fig.10 For the present invention Fig.10 A partial enlarged view of point B in the middle.

[0038] In the figure: 1. return type seed filling device; 101. seed plate holder; 1011. discharge channel; 1012. slide; 102. seed storage; 1021. V-shaped block; 1022. L-shaped support seat; 103. fixed seed filling plate; 1032. limit plate; 1033. seed slot; 104. movable seed discharge plate; 1041. circular opening; 1042. slider; 1043. circular magnet; 2. rotary swing force device; 3. return drive device; 301. screw; 4. frame. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0040] A factory-based tobacco seedling tray comprises a frame 4, on which a return-type seed filling device 1 is arranged, the return-type seed filling device 1 comprises a seed plate holder 101, a seed storage device 102, a fixed seed filling plate 103 and a movable seed discharge plate 104, the centers of both ends of the frame 4 are respectively connected to the center axes of both ends of the seed plate holder 101 through bearings, the seed plate holder 101 is driven by a rotary swing force device 2, and the rotary swing force device 2 is installed on the frame 4;

[0041] A seed storage device 102 is provided on one side of the seed plate holder 101, and a fixed seed filling plate 103 and a movable seed discharge plate 104 are provided in the seed plate holder 101. The movable seed discharge plate 104 is provided on the lower side of the fixed seed filling plate 103, and the fixed seed filling plate 103 is fixed to the inner wall of the seed plate holder 101. The movable seed discharge plate 104 is slidably provided inside the seed plate holder 101, and the movable seed discharge plate 104 cooperates with the return drive device 3, and the return drive device 3 is installed on the frame 4.

[0042] A plurality of discharge channels 1011 are arranged on one side of the seed plate holder 101, and a limiting plate 1032 and a seed groove 1033 are arranged on the fixed seed filling plate 103. A plurality of pairs of inclined limiting plates 1032 are fixed on the fixed seed filling plate 103, and each pair of limiting plates 1032 forms a V-shaped groove with the fixed seed filling plate 103. The discharge channel 1011 corresponds to the V-shaped groove and is connected thereto. The discharge channel 1011 and the V-shaped groove have the same shape, and the distance between the upper sides of each pair of limiting plates 1032 is greater than the distance between the lower sides. The fixed seed filling plate 103 is provided with a plurality of evenly arranged seed grooves 1033, and the seed grooves 1033 are arranged between each pair of limiting plates 1032.

[0043] The rotary and swinging power device 2 is a stepping motor.

[0044] Preferably, the seed plate holder 101 is a rectangular frame with a length of 1220-1250mm, a width of 350-360mm, and a thickness of 2-3mm. The discharge channels 1011 on the seed plate holder 101 are arranged along the length direction of the rectangular frame and the number is 15-30. The position and size of one end of the discharge channel 1011 connected to the V-shaped seed storage tank completely correspond. The height of the discharge channel 1011 is 20mm and the width is 8mm.

[0045] In this embodiment, the rotary swing force device 2 can drive the return type seed filling device 1 to rotate reciprocatingly, thereby driving the seed plate holder 101, the movable seed plate 104 and the fixed seed filling plate 103 to swing reciprocatingly, and the movable seed plate 104 can slide inside the seed plate holder 101, and the seeds can pass through the discharge channel 1011 into the V-shaped groove, and then fall into the seed groove 1033 during the reciprocating rotation of the fixed seed filling plate 103.

[0046] The movable seed plate 104 is provided with a plurality of circular openings 1041 , the circular openings 1041 and the seed slot 1033 have the same diameter, and the circular openings 1041 can be coaxial with the seed slot 1033 . A slider 1042 is fixed to one end of the movable seed plate 104 , and the slider 1042 can pass through a slide groove 1012 opened at one end of the seed plate fixture 101 .

[0047] In this embodiment, the seeds can fall into the circular opening 1041 when the circular opening 1041 and the seed slot 1033 are coaxial.

[0048] The seed storage device 102 includes an L-shaped support seat 1022 and a plurality of evenly arranged V-shaped blocks 1021, wherein the V-shaped blocks 1021 are evenly fixed on the horizontal plate of the L-shaped support seat 1022, and one side of the horizontal plate of the L-shaped support seat 1022 is fixedly connected to one side of the seed plate holder 101, and the horizontal plate of the L-shaped support seat 1022 is inclined, and the vertical plate of the L-shaped support seat 1022 is perpendicular to the ground, and the angle between the horizontal plate of the L-shaped support seat 1022 and the ground is 8-15 degrees, and a V-shaped seed storage groove is formed between adjacent V-shaped blocks 1021, and the V-shaped seed storage groove and the discharge channel 1011 are arranged one by one.

[0049] Preferably, the V-shaped seed storage groove is used to store tobacco seeds, the angle between the two sides of the V-shaped seed storage groove is 20°-40°, the length of the V-shaped seed storage groove is 45-50mm, the cross-section of the V-shaped seed storage groove is a contraction type groove, the contraction angle is 10°-20°, and the groove near one end of the seed plate fixture 101 is smaller, so the seeds are not easy to jump out when the seed filling plate 103 is fixed for seeding. After the seeding process is completed, the seeds can be recovered into the V-shaped seed storage groove again.

[0050] The movable seeding plate 104 is provided with a plurality of groups of evenly arranged circular magnet pieces 1043, which are arranged in an array to form a magnet piece array, and can push or pull the movable seeding plate 104 step by step by accurately controlling the power-on and power-off sequence and time of the circular magnet pieces 1043;

[0051] In the initial state, all the circular magnet pieces 1043 are not powered. First, the first group of circular magnet pieces 1043 are powered on to make them attract the movable seeding plate 104 to move and push the movable seeding plate 104 to move a short distance. Then, the power supply of the first group of circular magnet pieces 1043 is disconnected to release the movable seeding plate 104. Then, the second group of circular magnet pieces 1043 are powered on to continue to push the movable seeding plate 104 to move.

[0052] Each group of circular magnet pieces 1043 is turned on and off in sequence to gradually realize the translational movement of the movable seed plate 104. During the movement, the circular opening 1041 and the seed slot 1033 are displaced to be coaxial. When the circular opening 1041 and the seed slot 1033 are coaxial, the seeds can fall into the seed slot 1033.

[0053] Furthermore, the circular magnet piece 1043 is electrically connected to a power source and a switch, and the movable seeding plate 104 is made of magnetic material.

[0054] The rotary and swinging force device 2 is a stepping motor, which is fixed to one end of the frame 4 , and the output shaft of the stepping motor is fixedly connected to the central axis of one end of the seed plate holder 101 .

[0055] like Fig. 9 and Fig.10 As shown, the return drive device 3 is an electric cylinder, the telescopic rod of the electric cylinder is arranged corresponding to the slider 1402, and the telescopic rod of the electric cylinder can move the movable seed plate 104 in the seed plate holder 101 by pushing the slider 1402

[0056] An abutment plate is fixed to the outer end of the slider 1402, and the abutment plate can contact the telescopic rod of the electric cylinder. When the telescopic rod of the electric cylinder is extended, it is pushed, thereby driving the movable seed plate 104 to move, so that the movable seed plate 104 slides in the slide groove of the seed plate fixture 101 and pushes it back to the initial position.

[0057] Furthermore, when the circular magnet pieces 1043 are not powered, the circular opening 1041 of the movable seed plate 104 and the seed slot 1033 are not coaxial, each group of the circular magnet pieces 1043 are connected in series, and each group of the circular magnet pieces 1043 is respectively connected to a power switch, and the power switch is connected to a power supply (the power supply and the power switch are prior art and will not be described in detail and will not be shown in the figure).

[0058] In the initial position, the circular opening 1041 and the seed slot 1033 do not correspond. In order to realize the translational movement of the movable seeding plate 104, a plurality of circular magnet pieces 1043 are evenly arranged under the movable seeding plate 104 to form an electromagnet array. By accurately controlling the on and off sequence and time of the circular magnet pieces 1043, the movable seeding plate 104 is pushed or pulled step by step. In the initial state, all the circular magnet pieces 1043 are not energized. First, the first group of circular magnet pieces 1043 are energized to attract the movable seeding plate 104 and push the movable seeding plate 104 to move a short distance; then the first group of circular magnet pieces 1043 are disconnected. 43's power supply releases the movable seeding plate 104; then the second group of circular magnet pieces 1043 are energized to continue to push the movable seeding plate 104 to move, and each group of circular magnet pieces 1043 is turned on and off in turn to gradually realize the translational movement of the movable seeding plate 104 until the circular opening 1041 and the seed slot 1033 are coaxial. At this time, the tobacco seeds will fall into the seedling tray through the circular opening 1041 to complete the sowing. Finally, when the sowing is completed, the return drive device is started, and under the action of the electric cylinder, the movable seeding plate 104 is driven to move, and the movable seeding plate 104 drives the slider 1042 to move along the slide slot 1012, so that the movable seeding plate 104 returns to its original position.

[0059] Furthermore, the diameter of each of the seed slots 1033 and the circular opening 1041 is 1.2 mm, so that it can and only can be filled with one tobacco seed.

[0060] The movable seeding plate 104 is provided with 3 rows of holes with a diameter of 5 mm for installing the circular magnet pieces 1043, the spacing between the holes is 150 mm, and 8 rows of circular openings 1041 with a diameter of 1.2 mm are provided, and the spacing between the circular openings 1041 is 45-55 mm.

[0061] The cross section of the V-shaped seed storage groove formed between each pair of limiting plates 1032 on the fixed seed filling plate 103 is completely consistent with the cross section of the discharge channel 1011 .

[0062] When in use, a tobacco seedling tray is arranged at the lower side of the seed plate holder 101, and seeds are placed in the V-shaped seed storage groove of the seed storage device 102. The return type seed filling device 11 is driven by the rotary swing force device 2 to tilt during the reciprocating swing process. When the return type seed filling device 1 tilts, the tobacco seeds in the V-shaped seed storage groove of the seed storage device 102 flow out, pass through the discharge channel 1011 and enter the V-shaped groove formed by the limiting plate 1032. The seeds move left and right in the V-shaped groove of the fixed seed filling plate 103. When the tobacco seeds fill the seed groove 1033 on the fixed seed filling plate 104304, the seed filling is completed. After the seed filling is completed, the fixed seed filling plate 103 is tilted in the opposite direction under the drive of the rotary swing force device 2, and the seeds that have not entered the fixed seed filling plate 103 are reversely transported and stored in the seed storage device 102, and then the first group of circular magnetic The iron sheet 1043 is used to attract the movable seeding plate 104 and push the movable seeding plate 104 to move a short distance; then the power supply of the first group of circular magnet sheets 1043 is disconnected to release the movable seeding plate 104; then the second group of circular magnet sheets 1043 is powered on to continue to push the movable seeding plate 104 to move, and each group of circular magnet sheets 1043 is turned on and off in turn to gradually realize the translational movement of the movable seeding plate 104 until the circular opening 1041 and the seed groove 1033 are coaxial. At this time, the tobacco seeds will fall into the seedling tray through the circular opening 1041 to complete the sowing. Finally, when the sowing is completed, the return drive device is started, and under the action of the electric cylinder, the movable seeding plate 104 is driven to move, and the movable seeding plate 104 drives the slider 1042 to move along the slide groove 1012, so that the movable seeding plate 104 returns to its original position.

[0063] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A factory-based tobacco seedling tray, comprising a frame (4), characterized in that: The frame (4) is provided with a return type seed filling device (1), the return type seed filling device (1) comprises a seed plate fixer (101), a seed storage device (102), a fixed seed filling plate (103) and a movable seed discharge plate (104), the centers of both ends of the frame (4) are rotatably connected to the center axes of both ends of the seed plate fixer (101) through bearings respectively, the seed plate fixer (101) is driven by a rotary swing force device (2), and the rotary swing force device (2) is installed on the frame (4); A seed storage container (102) is provided on one side of the seed plate holder (101), and a fixed seed filling plate (103) and a movable seed discharging plate (104) are provided inside the seed plate holder (101), and the movable seed discharging plate (104) is provided on the lower side of the fixed seed filling plate (103), and the fixed seed filling plate (103) is fixed to the inner wall of the seed plate holder (101), and the movable seed discharging plate (104) is slidably provided inside the seed plate holder (101), and the movable seed discharging plate (104) cooperates with a return drive device (3), and the return drive device (3) is installed on the frame (4).

2. The factory-based tobacco seedling tray according to claim 1, characterized in that: A plurality of discharge channels (1011) are arranged on one side of the seed plate holder (101), a limiting plate (1032) and a seed groove (1033) are arranged on the fixed seed filling plate (103), a plurality of pairs of inclined limiting plates (1032) are fixed on the fixed seed filling plate (103), each pair of limiting plates (1032) forms a V-shaped groove with the fixed seed filling plate (103), the discharge channel corresponds to the V-shaped groove and is connected thereto, the discharge channel and the V-shaped groove have the same shape, the distance between the upper sides of each pair of limiting plates (1032) is greater than the distance between the lower sides, the fixed seed filling plate (103) is provided with a plurality of uniformly arranged seed grooves (1033), and the seed grooves (1033) are arranged between each pair of limiting plates (1032).

3. The factory-based tobacco seedling tray according to claim 2, characterized in that: The movable seed-dispensing plate (104) is provided with a plurality of circular openings (1041), the circular openings (1041) and the seed groove (1033) have the same diameter, and the circular openings (1041) can be coaxial with the seed groove (1033). A slider (1042) is fixed to one end of the movable seed-dispensing plate (104), and the slider (1042) can pass through a slide groove (1012) opened at one end of the seed plate fixture (101).

4. The factory-based tobacco seedling tray according to claim 3, characterized in that: The seed storage device (102) comprises an L-shaped support seat (1022) and a plurality of evenly arranged V-shaped blocks (1021), wherein the V-shaped blocks (1021) are evenly fixed on the transverse plate of the L-shaped support seat (1022), one side of the transverse plate of the L-shaped support seat (1022) is fixedly connected to one side of the seed plate holder (101), the transverse plate of the L-shaped support seat (1022) is inclined, the vertical plate of the L-shaped support seat (1022) is perpendicular to the ground, the angle between the transverse plate of the L-shaped support seat (1022) and the ground is 8-15 degrees, and a V-shaped seed storage groove is formed between adjacent V-shaped blocks (1021), and the V-shaped seed storage groove and the discharge channel (1011) are arranged one-to-one.

5. The factory-based tobacco seedling tray according to claim 4, characterized in that: The movable seeding plate (104) is provided with a plurality of groups of evenly arranged circular magnet pieces (1043), and the circular magnet pieces (1043) are arranged in an array to form a magnet piece array, and the movable seeding plate (104) can be pushed or pulled step by step by accurately controlling the on and off sequence and time of the circular magnet pieces (1043); In the initial state, all the circular magnet pieces (1043) are not powered. First, the first group of circular magnet pieces (1043) are powered on to attract the movable seeding plate (104) to move, and push the movable seeding plate (104) to move a short distance. Then, the power supply of the first group of circular magnet pieces (1043) is disconnected to release the movable seeding plate (104). Then, the second group of circular magnet pieces (1043) are powered on to continue pushing the movable seeding plate (104) to move. Each group of circular magnet pieces (1043) is turned on and off in sequence to gradually realize the translational movement of the movable seed plate (104). During the movement, the circular opening (1041) and the seed slot (1033) are displaced to be coaxial. When the circular opening (1041) and the seed slot (1033) are coaxial, the seeds can fall into the seed slot (1033).

6. The factory-based tobacco seedling tray according to claim 5, characterized in that: The rotary and oscillating force device (2) is a stepping motor, which is fixed to one end of the frame (4), and the output shaft of the stepping motor is fixedly connected to the central axis of one end of the seed plate holder (101).

7. The factory-based tobacco seedling tray according to claim 6, characterized in that: The return drive device (3) is an electric cylinder, the telescopic rod of the electric cylinder is arranged corresponding to the slider (1402), and the telescopic rod of the electric cylinder can realize the movement of the movable seed plate (104) in the seed plate holder (101) by pushing the slider (1402).

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