A seedling tray drilling device for agricultural machinery

Abstract

The invention discloses a seedling tray drilling device for agricultural machinery, comprising a base, a bracket is provided on the base, a support platform is provided on one side of the base, a storage slot for placing the seedling tray is provided on the other side, a bottom plate is connected to the support platform by screws, a plurality of positioning columns matching the seedling tray are fixed on the bottom plate, a linear displacement mechanism is provided on the upper part of the bracket, and a slide is connected to the linear displacement mechanism, and the slide can be driven to move back and forth above the support platform and the storage slot by the linear displacement mechanism; two first cylinders are connected to the bottom surface of the slide, and the telescopic ends of the two first cylinders are connected to a lifting plate, and a grabbing part and a drilling part are installed on the lifting plate, and the seedling tray in the storage slot is grabbed by the grabbing part and placed on the positioning column. The seedling tray is overlapped in the storage slot, and the seedling tray is grabbed from top to bottom in sequence by the grabbing part and placed on the positioning column, and then the seedling tray is drilled by the drilling part, without manual loading, thereby improving the drilling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to a seedling tray drilling equipment for agricultural machinery. Background Art

[0002] With the development of industry, agricultural progress has also improved significantly. Various equipment has emerged to replace traditional oxen, manual labor and other initial production, and production efficiency has also been greatly improved. For example, the seedling planting machine is a popular agricultural planting machine in Chinese towns. When the planting machine is working, it needs to take out the plants in the seedling tray and insert them into the soil. Among them, Figure 6 As shown in the figure, it is a schematic diagram of a seedling tray 39, which has a frame 40 and a plurality of conical seedling receiving parts 41 fixed on the frame. Before planting, the plants and soil need to be placed in the seedling receiving parts in advance. In order to allow air circulation in the seedling receiving parts, holes need to be drilled at the bottom of the seedling receiving parts, so a drilling device is required. After drilling, the holes are Figure 7 shown.

[0003] However, there is currently a lack of a device for drilling holes in the seedling tray. Therefore, when drilling holes in the seedling tray, most of the holes are drilled one by one on the bottom surface of the seedling receiving portion manually, resulting in low drilling efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a seedling tray drilling device for agricultural machinery to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A seedling tray drilling device for agricultural machinery comprises a base, a bracket is provided on the base, a support platform is provided on one side of the base, and a storage groove for placing the seedling tray is provided on the other side, a bottom plate is connected to the support platform by screws, a plurality of positioning columns matching the seedling tray are fixed on the bottom plate, a linear displacement mechanism is provided on the upper part of the bracket, and a slide seat is connected to the linear displacement mechanism, and the slide seat can be driven to move back and forth above the support platform and the storage groove by the linear displacement mechanism; two first cylinders are connected to the bottom surface of the slide seat, and the telescopic ends of the two first cylinders are connected to a lifting plate, and a grabbing part and a drilling part are installed on the lifting plate, and the seedling tray in the storage groove is grabbed by the grabbing part and placed on the positioning column; the drilling part comprises a plurality of rotating shafts rotatably connected to the lifting plate, and a plurality of rotating shafts connected to the rotating shaft A drill rod on the bottom surface of the shaft, a first bevel gear connected to the upper end of the rotating shaft, and a cover shell connected to the lifting plate. The first bevel gear is located in the cover shell, and all the rotating shafts are arranged in a matrix. When the lifting plate is aligned with the bottom plate, the drill rod corresponds to the positioning column one by one. The drilling part also includes a plurality of cross bars rotatably connected to the cover shell, a second bevel gear connected to the cross bar and meshed with the first bevel gears on the same horizontal row, a third bevel gear connected to the cross bar and close to one side of the longitudinal bar, a bearing plate fixed to the rear end of the lifting plate, a longitudinal bar rotatably connected to the front wall of the cover shell and the bearing plate, a fourth bevel gear connected to the longitudinal bar and meshed with the third bevel gear, and a first motor installed on the lifting plate. The first motor is connected to one end of the longitudinal bar through a coupling.

[0007] Preferably, the linear displacement mechanism includes a first screw rod rotatably connected to the upper part of the bracket, a guide rod connected to the bracket and located on both sides of the screw rod, and a second motor installed on the outside of the bracket. The second motor is transmission-connected to one end of the first screw rod through a coupling, the slide is threadedly connected to the first screw rod, and the slide is slidably connected to the guide rod.

[0008] In the above technical solution, the second motor is started to drive the first screw to rotate. During the rotation of the first screw, the slide is driven to move linearly along the guide rod, thereby driving the grasping part and the drilling part to reach the top of the storage slot or the support platform at the same time.

[0009] Preferably, the grabbing part includes a second cylinder installed at the four corners of the lifting plate, a box body connected to the telescopic end of the second cylinder, and a rotating column rotatably connected to the box body, the lower end of the rotating column passes through the box body, and the protruding end is connected to a support plate, the support plate is perpendicular to the rotating column, the grabbing part also includes a finger cylinder installed on the support plate, the claw ends of the finger cylinders on both sides are arranged opposite to each other, the grabbing part also includes a third motor installed in the box body, a transmission shaft connected to the third motor through a coupling, a main gear connected to the transmission shaft, and a sub-gear connected to the rotating column, and the main gear is meshed with the sub-gear.

[0010] The above technical scheme drives the box body to descend by controlling the extension of the second cylinder. When the support plate reaches the outside of the frame of the upper seedling tray, the third motor is started, and the rotating column is driven to rotate through the cooperation of the main gear and the auxiliary gear, thereby driving the support plate to rotate toward the seedling tray, so that the edge of the frame of the seedling tray is located in the clamping claws of the finger cylinder, and then the seedling tray is clamped by the finger cylinder, and then the second cylinder is controlled to contract to lift the top seedling tray.

[0011] Preferably, a limiting mechanism for limiting the position of the seedling tray is provided in the storage groove.

[0012] Preferably, the limiting mechanism includes a cavity provided in the base and below the storage slot, a sliding hole opened in the center of the bottom surface of the storage slot, the sliding hole is connected to the cavity, the limiting mechanism also includes a second screw rod rotatably connected to the cavity, a fourth motor installed on the outside of the base and transmission connected to the second screw rod, the second screw rod is provided with reverse threads on both sides, and the second screw rod is threadedly connected with slides on both sides, the two slides are at an equal distance from the center of the second screw rod, the two slides are slidably provided in the sliding hole, and limiting plates are fixed on the two slides.

[0013] The above technical solution places the seedling tray between the two limit plates, and then starts the fourth motor to drive the second screw rod to rotate. The rotation of the two second screw rods will drive the two slide plates to move relative to each other at the same time to clamp the seedling tray. Since the distances from the two slide plates to the midpoints of the second screw rods are equal, after the two slide plates clamp the seedling tray, the seedling tray is in the middle position of the left and right sides. At the same time, the length of the seedling tray should be equal to the length of the storage slot, so that the seedling tray can be in the middle position of the front and rear sides. Only in this way can the seedling tray be in the center position, so that after the grasping part grasps it, the seedling tray can be accurately buckled on the positioning column.

[0014] Preferably, a control cabinet is provided on one side of the base, a display is installed on the control cabinet, a controller is provided in the control cabinet, and the first motor, the second motor, the third motor, the fourth motor, the first cylinder, the second cylinder, the finger cylinder, and the display are all electrically connected to the controller.

[0015] In the above technical solution, a control program is provided in the controller for controlling the first motor, the second motor, the third motor, the fourth motor, the first cylinder, the second cylinder, the finger cylinder, and the display to work in an orderly manner.

[0016] Preferably, position sensors are provided on the opposite surfaces of the bottom plate and the lifting plate, and the position sensors are electrically connected to the controller.

[0017] The above technical solution is to set position sensors on the base plate and the lifting plate. When the two position sensors sense signals from each other, the base plate and the lifting plate are aligned, and the positioning columns on the base plate and the drill rods on the lifting plate are aligned one by one.

[0018] Preferably, a drill hole is provided at the center of the top surface of the positioning column.

[0019] According to the above technical solution, when the drill rod drills holes in the seedling tray, the presence of the holes can prevent the drill rod from damaging the positioning column.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) Overlap the seedling trays in the storage slot, grab the seedling trays from top to bottom in sequence through the grabbing part, and place them on the positioning column, and then drill holes in the seedling trays through the drilling part, without manual loading, which improves the drilling efficiency. In addition, the grabbing part and the drilling part are integrated together, which reduces the size of the equipment and reduces the manufacturing cost of the equipment.

[0022] (2) When drilling, the first motor is started, the longitudinal rod rotates, and the longitudinal rod drives all the cross rods to rotate through the cooperation of the fourth bevel gear and the third bevel gear. The cross rod drives all the rotating shafts to rotate through the cooperation of the second bevel gear and the first bevel gear, thereby driving all the drill rods to rotate, so as to drill holes in the seedling receiving part of the seedling tray at the same time, greatly improving the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram after removing the cover;

[0025] Figure 3 It is a front view of the present invention;

[0026] Figure 4 is a top cross-sectional view of the drilling portion;

[0027] Figure 5 It is a schematic diagram of the box body;

[0028] Figure 6 This is a schematic diagram of the seedling tray;

[0029] Figure 7 This is a cross-sectional view of the seedling tray after drilling;

[0030] In the figure: 1-base, 2-bracket, 3-support table, 4-storage slot, 5-bottom plate, 6-positioning column, 7-slide seat, 8-first cylinder, 9-lifting plate, 10-rotating shaft, 11-first bevel gear, 12-cover, 13-cross bar, 14-second bevel gear, 15-third bevel gear, 16-bearing plate, 17-longitudinal rod, 18-fourth bevel gear, 19-first motor, 20-first screw rod, 21 -guide rod, 22-second motor, 23-second cylinder, 24-box body, 25-rotating column, 26-support plate, 27-finger cylinder, 28-third motor, 29-main gear, 30-secondary gear, 31-sliding hole, 32-second screw rod, 33-fourth motor, 34-slide plate, 35-limiting plate, 36-control cabinet, 37-display, 38-drilling, 39-seedling tray, 40-frame, 41-seedling container. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1-5 A seedling tray drilling device for agricultural machinery includes a base 1, a bracket 2 is provided on the base 1, a support platform 3 is provided on one side of the base 1, and a storage slot 4 for placing the seedling tray is provided on the other side, a bottom plate 5 is connected to the support platform 3 by screws, and a plurality of positioning columns 6 matching the seedling tray are fixed on the bottom plate 5, a linear displacement mechanism is provided on the upper part of the bracket 2, and a slide 7 is connected to the linear displacement mechanism, and the slide 7 can be driven to move back and forth above the support platform 3 and the storage slot 4 by the linear displacement mechanism. Specifically, the linear displacement mechanism includes a first screw rod 20 rotatably connected to the upper part of the bracket, a guide rod 21 connected to the bracket and located on both sides of the screw rod, and a second motor 22 installed on the outer side of the bracket, the second motor 22 is transmission-connected to one end of the first screw rod 20 through a coupling, the slide 7 is threadedly connected to the first screw rod 20, and the slide 7 is slidably connected to the guide rod 21. The second motor 22 is started to drive the first screw rod 20 to rotate. During the rotation of the first screw rod 20, the slide 7 is driven to move linearly along the guide rod 21, so as to drive the slide 7 to reach the top of the storage slot 4 or the support platform 3.

[0034] The bottom surface of the slide seat 7 is connected to two first cylinders 8, and the telescopic ends of the two first cylinders 8 are connected to a lifting plate 9. A grabbing part and a drilling part are installed on the lifting plate 9. The grabbing part grabs the seedling tray in the storage groove and places it on the positioning column 6.

[0035] The grabbing part includes a second cylinder 23 installed at the four corners of the lifting plate, a box body 24 connected to the telescopic end of the second cylinder, and a rotating column 25 rotatably connected to the box body. The lower end of the rotating column 25 passes through the box body, and the passing end is connected to a support plate 26, and the support plate 26 is perpendicular to the rotating column 25. The grabbing part also includes a finger cylinder 27 installed on the support plate, and the claw ends of the finger cylinders 27 on both sides are arranged opposite to each other. The grabbing part also includes a third motor 28 installed in the box body, a transmission shaft connected to the third motor through a coupling, a main gear 29 connected to the transmission shaft, and a sub-gear 30 connected to the rotating column, and the main gear 29 is meshed with the sub-gear 30. The seedling tray is stacked in the storage groove 4. When the seedling tray is grabbed by the grabbing part, the second cylinder 23 is controlled to extend, driving the box body 24 to descend. When the support plate 26 reaches the outside of the frame 40 of the upper seedling tray, the third motor 28 is started, and the rotating column 25 is driven to rotate through the cooperation of the main gear 29 and the auxiliary gear 30, thereby driving the support plate 26 to rotate in the direction of the seedling tray, so that the edge of the frame 40 of the seedling tray is located in the clamping claw of the finger cylinder 27, and then the seedling tray is clamped by the finger cylinder 27, and then the second cylinder 23 is controlled to contract to lift the seedling tray of the uppermost layer. It should be noted that when the seedling tray of the upper layer is separated from the seedling tray of the lower layer, the lifted seedling tray will not contact the drill rod. In addition, when the second cylinder 23 grabs the seedling tray, the distance of each extension of the second cylinder 23 can be set according to the spacing between the adjacent frames 40 after the seedling trays overlap, so that after each extension of the second cylinder, the frame can be located between the two clamping claws of the finger cylinder.

[0036] A limiting mechanism for limiting the position of the seedling tray is provided in the storage groove 4. The limiting mechanism includes a cavity provided in the base and below the storage groove, a sliding hole 31 provided at the center of the bottom surface of the storage groove, the sliding hole 31 is connected to the cavity, the limiting mechanism also includes a second screw rod 32 rotatably connected to the cavity, a fourth motor 33 installed on the outside of the base and transmission-connected to the second screw rod, the second screw rod 32 is provided with reverse threads on both sides, and the second screw rod 32 is threadedly connected with slide plates 34 on both sides, the two slide plates 34 are at equal distances from the center of the second screw rod 32, the two slide plates 34 are slidably provided in the sliding hole 31, and the two slide plates 34 are fixed with limiting plates 35. The seedling tray is placed between the two limiting plates 35, and then the fourth motor 33 is started to drive the second screw rod 32 to rotate. The rotation of the two second screw rods 32 will drive the two slide plates 34 to move relative to each other at the same time to clamp the seedling tray. Since the distances between the two slide plates 34 and the midpoint of the second screw rod 32 are equal, the seedling tray is in the middle position of the left and right sides after the two slide plates 34 clamp the seedling tray. At the same time, the length of the seedling tray can be equal to the length of the storage slot 4, so that the seedling tray can be in the middle position of the front and rear sides, so that the seedling tray can be in the center position, so that after the grasping part grasps, the seedling tray can be accurately buckled on the positioning column 6. In addition, another set of limiting mechanisms cooperating with the limiting mechanisms can be set in the front and rear directions in the storage slot to realize the centering of the seedling tray.

[0037] The drilling part includes a plurality of rotating shafts 10 rotatably connected to the lifting plate, a drill rod connected to the bottom surface of the rotating shaft, a first bevel gear 11 connected to the upper end of the rotating shaft, and a cover 12 connected to the lifting plate. The first bevel gear 11 is located in the cover 12, and all the rotating shafts 10 are arranged in a matrix. When the lifting plate 9 is aligned with the base plate 1, the drill rod corresponds to the positioning column 6 one by one. The drilling part also includes a plurality of cross bars 13 rotatably connected to the cover, a second bevel gear 14 connected to the cross bar and meshed with the first bevel gears on the same horizontal row, a third bevel gear 15 connected to the cross bar and close to one side of the longitudinal bar, a bearing plate 16 fixed to the rear end of the lifting plate, a longitudinal bar 17 rotatably connected to the front wall of the cover and the bearing plate, a fourth bevel gear 18 connected to the longitudinal bar and meshed with the third bevel gear, and a first motor 19 installed on the lifting plate. The first motor 19 is transmission-connected to one end of the longitudinal bar 17 through a coupling. When drilling, start the first motor 19 to drive the longitudinal rod 17 to rotate. The longitudinal rod 17 drives all the cross rods 13 to rotate through the cooperation of the fourth bevel gear 18 and the third bevel gear 15. The cross rod 13 drives all the rotating shafts 10 to rotate through the cooperation of the second bevel gear 14 and the first bevel gear 11, thereby driving all the drill rods to rotate, so as to drill the seedling receiving part of the seedling tray at the same time, which greatly improves the drilling efficiency.

[0038] A control cabinet 36 is provided on one side of the base 1, and a display 37 is installed on the control cabinet 36. A controller is provided in the control cabinet, and the first motor 19, the second motor 22, the third motor 28, the fourth motor 33, the first cylinder 8, the second cylinder 23, the finger cylinder 27, and the display 37 are all electrically connected to the controller. A control program is provided in the controller for controlling the first motor, the second motor, the third motor, the fourth motor, the first cylinder, the second cylinder, the finger cylinder, and the display to work in an orderly manner.

[0039] Position sensors are provided on the opposite surfaces of the bottom plate 5 and the lifting plate 9, and the position sensors are electrically connected to the controller. By arranging position sensors on the bottom plate and the lifting plate, when the two position sensors sense signals from each other, the bottom plate and the lifting plate are aligned, and at the same time, the positioning columns on the bottom plate and the drill rods on the lifting plate are aligned one by one.

[0040] The working principle of this embodiment is as follows: the seedling trays are stacked in the storage groove 4, and the seedling trays are centered in the storage groove by the limiting mechanism, and then the second cylinder 23 is controlled to extend to drive the box body 24 to descend. When the support plate 26 reaches the outside of the frame 40 of the upper seedling tray, the third motor 28 is started, and the rotating column 25 is driven to rotate through the cooperation of the main gear 29 and the auxiliary gear 30, thereby driving the support plate 26 to rotate toward the seedling tray, so that the edge of the frame 40 of the seedling tray is located in the clamping claw of the finger cylinder 27, and then the seedling tray is clamped by the finger cylinder 27, and then the second cylinder 23 is controlled to contract to lift the uppermost seedling tray.

[0041] Then, the slide 7 is driven to move toward the support platform 3 through the linear displacement mechanism, and the bottom plate 5 is aligned with the lifting plate 9 through the cooperation of the position sensors on the bottom plate 5 and the lifting plate 9. Then, the second cylinder 23 is controlled to extend, driving the seedling tray to descend, and buckling the seedling tray on the positioning column 6. Then, the finger cylinder 27 is opened, and the rotating column 25 is controlled to rotate at the same time, so that the support plate 26 is away from the seedling tray. Then, the second cylinder 23 contracts, so that the support plate 26 rises and leaves the seedling tray.

[0042] When drilling, start the first motor 19 to drive the longitudinal rod 17 to rotate. The longitudinal rod 17 drives all the cross rods 13 to rotate through the cooperation of the fourth bevel gear 18 and the third bevel gear 15. The cross rod 13 drives all the rotating shafts 10 to rotate through the cooperation of the second bevel gear 14 and the first bevel gear 11, thereby driving all the drill rods to rotate, so as to drill the seedling receiving part of the seedling tray at the same time, which greatly improves the drilling efficiency.

[0043] Example 2

[0044] On the basis of embodiment 1, a bore hole 38 is provided at the center of the top surface of the positioning column 6. When the drill rod drills holes in the seedling tray, the presence of the bore hole can prevent the drill rod from damaging the positioning column.

[0045] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seedling tray drilling device for agricultural machinery, characterized in that: The base (1) comprises a support (2), a support platform (3) is provided on one side of the base (1), a storage groove (4) for placing a seedling tray is provided on the other side, a bottom plate (5) is connected to the support platform (3) by screws, a plurality of positioning columns (6) matching the seedling tray are fixed on the bottom plate (5), a linear displacement mechanism is provided on the upper part of the support (2), and a slide seat (7) is connected to the linear displacement mechanism, and the slide seat (7) can be driven to move back and forth above the support platform (3) and the storage groove (4) by the linear displacement mechanism; The bottom surface of the slide seat (7) is connected to two first cylinders (8), and the telescopic ends of the two first cylinders (8) are connected to a lifting plate (9), and a grabbing portion and a drilling portion are installed on the lifting plate (9), and the seedling tray in the storage groove is grabbed by the grabbing portion and placed on the positioning column (6); The drilling portion comprises a plurality of rotating shafts (10) rotatably connected to the lifting plate, a drill rod connected to the bottom surface of the rotating shaft, a first bevel gear (11) connected to the upper end of the rotating shaft, and a cover shell (12) connected to the lifting plate, wherein the first bevel gear (11) is located in the cover shell (12), and all the rotating shafts (10) are arranged in a matrix. When the lifting plate (9) is aligned with the bottom plate (5), the drill rod and the positioning column (6) correspond one to one. The drilling portion also comprises a plurality of cross bars (13) rotatably connected to the cover shell, and a plurality of cross bars (13) connected to the cross bars and A second bevel gear (14) meshed with the first bevel gears on the same horizontal row, a third bevel gear (15) connected to the horizontal rod and close to the longitudinal rod, a bearing plate (16) fixed to the rear end of the lifting plate, a longitudinal rod (17) rotatably connected to the front wall of the housing and the bearing plate, a fourth bevel gear (18) connected to the longitudinal rod and meshed with the third bevel gears, and a first motor (19) mounted on the lifting plate, the first motor (19) being transmission-connected to one end of the longitudinal rod (17) via a coupling; The grabbing part comprises a second cylinder (23) installed at the four corners of the lifting plate, a box body (24) connected to the telescopic end of the second cylinder, and a rotating column (25) rotatably connected to the box body, the lower end of the rotating column (25) passes through the box body, and the passing end is connected to a support plate (26), the support plate (26) is perpendicular to the rotating column (25), the grabbing part also comprises a finger cylinder (27) installed on the support plate, the clamping claw ends of the finger cylinders (27) on both sides are arranged opposite to each other, the grabbing part also comprises a third motor (28) installed in the box body, a transmission shaft connected to the third motor through a coupling, a main gear (29) connected to the transmission shaft, and a sub-gear (30) connected to the rotating column, the main gear (29) meshing with the sub-gear (30).

2. The seedling tray drilling device for agricultural machinery according to claim 1, characterized in that: The linear displacement mechanism comprises a first screw rod (20) rotatably connected to the upper part of the bracket, guide rods (21) connected to the bracket and located on both sides of the screw rod, and a second motor (22) installed on the outer side of the bracket, the second motor (22) being transmission-connected to one end of the first screw rod (20) via a coupling, a slide seat (7) being threadedly connected to the first screw rod (20), and the slide seat (7) being slidably connected to the guide rod (21).

3. The seedling tray drilling device for agricultural machinery according to claim 2, characterized in that: A limiting mechanism for limiting the position of the seedling tray is provided in the storage groove (4).

4. The seedling tray drilling device for agricultural machinery according to claim 3, characterized in that: The limiting mechanism comprises a cavity arranged in the base and located below the storage slot, a sliding hole (31) opened at the center of the bottom surface of the storage slot, the sliding hole (31) being communicated with the cavity, the limiting mechanism also comprises a second screw rod (32) rotatably connected to the cavity, a fourth motor (33) installed on the outside of the base and transmission-connected to the second screw rod, the second screw rod (32) having opposite threads on both sides, and slide plates (34) being threadedly connected to both sides of the second screw rod (32), the two slide plates (34) being equidistant from the center of the second screw rod (32), the two slide plates (34) being slidably arranged in the sliding hole (31), and the two slide plates (34) being fixed with limiting plates (35).

5. The seedling tray drilling device for agricultural machinery according to claim 4, characterized in that: A control cabinet (36) is provided on one side of the base (1), a display (37) is mounted on the control cabinet (36), a controller is provided in the control cabinet, and the first motor (19), the second motor (22), the third motor (28), the fourth motor (33), the first cylinder (8), the second cylinder (23), the finger cylinder (27), and the display (37) are all electrically connected to the controller.

6. The seedling tray drilling device for agricultural machinery according to claim 5, characterized in that: Position sensors are provided on the opposing surfaces of the bottom plate (5) and the lifting plate (9), and the position sensors are electrically connected to the controller.

7. A seedling tray drilling device for agricultural machinery according to any one of claims 1 to 6, characterized in that: A drill hole (38) is provided at the centre of the top surface of the positioning column (6).

Images