Seedling pressing device

Abstract

The utility model discloses a seedling pressing device which comprises a frame and a walking mechanism driving the frame to move, a pressing mechanism used for pressing seedlings and a lifting mechanism driving the pressing mechanism to ascend and descend are arranged on the frame, the pressing mechanism comprises a connecting plate, a pressing plate, a plurality of guide rods and a compression spring, the guide rod is fixedly installed on the connecting plate and vertically extends downwards, the pressing plate sleeves the outer side of the guide rod and is in sliding connection with the peripheral wall of the guide rod, the pressure spring sleeves the outer side of the guide rod, one end of the pressure spring abuts against the bottom wall of the connecting plate, the other end of the pressure spring abuts against the top wall of the pressing plate, and the lifting end of the lifting mechanism is connected with the top wall of the connecting plate. When the seedlings are pressed, the pressing plate is in contact with the seedlings and compresses the pressure spring, so that damage to the seedlings in the seedling pressing process can be reduced through elastic pressing, and the seedling pressing effect is improved; a large-area pressing plate is used for replacing a traditional manual stepping mode, and the seedling pressing efficiency of seedlings can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crop seedling pressing machinery, in particular to a seedling pressing device. Background Art

[0002] Pressing down crop seedlings can increase soil compactness, maintain soil surface moisture, and prevent soil settlement, thereby achieving the effect of crushing the soil, conserving moisture, promoting seedling emergence, and increasing crop yields. It can enhance the drought and frost resistance of seedlings, and is beneficial to the secondary development of crop roots.

[0003] Among them, the problem of increasing peanut yield by suppressing peanut seedlings is analyzed; during the growth process of peanuts, fruit needles will grow on the peanut seedlings, and the fruit needles can only grow into peanut fruits after they penetrate the soil; if the fruit needles are not disturbed, there is a certain distance between the fruit needles and the soil, which affects the contact between the fruit needles and the soil, thereby affecting the yield of peanuts. Therefore, after the peanut seedlings grow fruit needles, in order to increase the yield of peanuts, it is necessary to manually step on the peanut seedlings to make the fruit needles contact with the soil. This method of manually stepping on the peanut seedlings to achieve the suppressing effect has the disadvantages of large workload and low suppressing efficiency.

[0004] Therefore, how to design a seedling pressing device that improves the efficiency of seedling pressing has become a technical problem that needs to be solved urgently by people in this field. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a seedling pressing device to solve the problem of low efficiency of peanut seedling pressing.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A seedling pressing device comprises a frame and a walking mechanism for driving the frame to move, the frame is provided with a pressing mechanism for pressing the seedlings and a lifting mechanism for driving the pressing mechanism to rise and fall, the pressing mechanism comprises a connecting plate, a pressing plate, a plurality of guide rods and a compression spring, wherein the guide rod is fixedly mounted on the connecting plate and extends vertically downward, the pressing plate is sleeved on the outer side of the guide rod and is slidably connected to the peripheral wall of the guide rod, the compression spring is sleeved on the outer side of the guide rod, one end of the compression spring abuts against the bottom wall of the connecting plate, the other end of the compression spring abuts against the top wall of the pressing plate, and the lifting end of the lifting mechanism is connected to the top wall of the connecting plate.

[0008] Furthermore, it also includes a central control unit and a distance sensor. The distance sensor is fixedly mounted on the connecting plate, and the detection end of the distance sensor points to the pressing plate. The distance sensor and the driving source of the lifting mechanism are electrically connected to the central control unit.

[0009] Furthermore, the lifting mechanism includes a first motor, a screw, a slide groove arranged on the frame, a sliding block and a scissors-fork mechanism, wherein the screw is arranged along the length direction of the slide groove, the output end of the first motor is fixedly connected to the screw, the side wall of the sliding block is slidingly connected to the side wall of the slide groove, the screw is threadedly connected to the sliding block, and the scissors-fork mechanism includes a positioning point hinged to the frame and an active point hinged to the sliding block, the positioning point and the active point are located at the same end of the scissors-fork mechanism, and the end of the scissors-fork mechanism away from the positioning point or the active point is provided with a connecting shaft rotatably connected to the connecting plate.

[0010] Furthermore, a mounting frame is fixedly mounted on the frame, a slide slot is arranged on the mounting frame, a lifting mechanism is mounted on the mounting frame, and a positioning point is hinged to a bottom wall of the mounting frame.

[0011] Furthermore, a positioning seat is fixedly provided on the mounting frame, and the end of the screw rod is rotatably connected to the positioning seat.

[0012] Furthermore, the connecting plate is provided with a balancing seat located on both sides of the adapter shaft, and also includes a spring located on both sides of the adapter shaft and symmetrical about the axis of the adapter shaft, one end of the spring is connected to the balancing seat, and the other end of the spring is connected to the scissor mechanism.

[0013] Furthermore, the lifting mechanism includes a telescopic cylinder, a cylinder body of the telescopic cylinder is fixedly connected to the frame, the telescopic rod of the telescopic cylinder is provided with a connecting shaft rotatably connected to the connecting plate, the top wall of the connecting plate is provided with a balancing seat located on both sides of the connecting shaft, and also includes a spring, one end of the spring is hooked on the balancing seat, and the other end of the spring is hooked on the telescopic rod of the telescopic cylinder.

[0014] Furthermore, the spring is a tension spring.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model drives the frame to walk in the seedling field through the walking mechanism to change the position of the pressing mechanism, which is convenient for pressing the seedlings; the lifting mechanism is used to drive the pressing mechanism to rise and fall, so that the pressing mechanism can be pressed on the seedlings to complete the seedling pressing step; when pressing the seedlings, the pressing plate contacts the seedlings and compresses the compression spring, and the elastic pressing here can reduce the damage to the seedlings during the seedling pressing process and improve the seedling pressing effect; using a large-area pressing plate to replace the traditional manual foot-stepping method can improve the seedling pressing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a side view of the lifting mechanism;

[0018] Figure 3 It is a structural schematic diagram of the lifting mechanism;

[0019] Figure 4 This is a structural schematic diagram of the weeding mechanism of the utility model;

[0020] Figure 5 It is a side view of the weeding mechanism at a first angle;

[0021] Figure 6 This is a side view of the weeding mechanism from a second angle.

[0022] In the figure: 1, frame; 11, mounting frame; 111, slide; 2, walking mechanism; 3, lifting mechanism; 31, positioning seat; 32, screw rod; 33, sliding block; 34, first motor; 35, scissor mechanism; 351, positioning point; 352, active point; 353, connecting point; 4, pressing mechanism; 41, connecting plate; 411, balancing seat; 42, spring; 43, guide rod; 44, pressing plate; 45, compression spring; 46, distance sensor; 5, weeding mechanism; 51, connecting seat; 52, second Motor; 53, third motor; 54, first adjusting mechanism; 541, swing arm; 542, connecting plate; 5421, first hinge point; 5422, second hinge point; 5423, third hinge point; 543, first pull rod; 544, second pull rod; 55, second adjusting mechanism; 551, cantilever; 552, push rod; 56, grabbing device; 561, fourth motor; 562, mounting table; 5621, fourth hinge point; 5622, fifth hinge point; 563, clamp; 57, lifting arm. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The present embodiment provides a seedling pressing device, which is mainly used for pressing peanut seedlings, pressing the fruit needles on the seedlings onto the soil, and increasing the yield of peanuts.

[0025] like Figure 1As shown, it includes a frame 1 and a walking mechanism 2 installed on the frame 1 to move the frame 1, wherein a pressing mechanism 4 and a lifting mechanism 3 for controlling the lifting of the pressing mechanism 4 are provided on the frame 1, wherein when the walking mechanism 2 drives the frame 1 and the pressing mechanism 4 to move above the peanut seedlings that are not pressed, the lifting mechanism 3 is used to drive the pressing mechanism 4 to move downward, thereby pressing the peanut seedlings, so that the fruit needles on the seedlings are in contact with the soil, completing the seedling pressing action, and then, the lifting mechanism 3 drives the pressing mechanism 4 to move upward to release the contact with the peanut seedlings, and the walking mechanism 2 is used to transfer the position of the frame 1 and the pressing mechanism 4, and the above actions are repeated, thereby improving the efficiency of the peanut seedling pressing.

[0026] In order to improve the pressing effect on the peanut seedlings, in this embodiment, Figure 2 As shown, the pressing mechanism 4 includes a connecting plate 41, a guide rod 43, a pressing plate 44 and a compression spring 45, wherein the connecting plate 41 is connected to the lifting end of the lifting mechanism 3 to realize the lifting and lowering of the connecting plate 41, a plurality of guide rods 43 are provided, the guide rods 43 are fixed on the connecting plate 41 and extend vertically downward, the pressing plate 44 is sleeved on the guide rod 43 and can slide up and down along the guide rod 43, wherein the compression spring 45 is sleeved on the outer side of the guide rod 43, one end of the compression spring 45 abuts against the bottom wall of the connecting plate 41, and the other end of the compression spring 45 abuts against the top wall of the pressing plate 44.

[0027] Through the above arrangement, when the lifting mechanism 3 pushes the connecting plate 41 to move downward, the compression spring 45 first pushes the pressing plate 44 to move away from the connecting plate 41. When the pressing plate 44 contacts the peanut seedlings to press the seedlings, the pressing plate 44 abuts against the ground and compresses the compression spring 45. The elastic abutment between the pressing plate 44 and the peanut seedlings can control the pressure on the peanut seedlings and improve the pressing effect of the peanut seedlings. It is worth mentioning that at this time, the pressing plate 44 is used to replace the stepping of human feet on the seedlings, thereby improving the efficiency of pressing the seedlings.

[0028] In order to accurately control the pressing force on the seedlings, in this embodiment, Figure 2 As shown, it also includes a central control unit and a distance sensor 46, wherein the distance sensor 46 is fixedly mounted on the connecting plate 41 and the detection end of the distance sensor 46 points to the pressing plate 44, and the distance sensor 46 and the driving source in the lifting mechanism 3 are electrically connected to the central control unit.

[0029] Through the above-mentioned setting, the distance sensor 46 is used to detect the distance between the connecting plate 41 and the pressing plate 44. Since the compression spring 45 is sleeved on the outside of the guide rod 43, the distance between the detection end of the distance sensor 46 and the bottom wall of the connecting plate 41 is a constant, so the distance sensor 46 can detect the deformation of the compression spring 45, and then calculate the pressure of the pressing plate 44 on the peanut seedlings through the deformation of the compression spring 45, and transmit the pressure signal to the central control unit. The central control unit is used to control whether the driving source in the lifting mechanism 3 outputs power to the outside world, thereby controlling the lifting and lowering of the connecting plate 41, and then controlling the pressure on the peanut seedlings to prevent the seedlings from being damaged during the pressing process.

[0030] It is worth mentioning here that the distance sensor 46 can also be replaced by a pressure sensor, which can be installed on the connecting plate 41 or the pressing plate 44 to detect the pressing force of the pressing plate 44 on the peanut seedlings, and use the pressure sensor to transmit the signal to the central control unit, thereby realizing the control of the driving source of the lifting mechanism 3.

[0031] In order to realize the walking of frame 1, in this embodiment, the walking mechanism includes a driving motor and a transmission assembly. The driving motor is fixedly mounted on frame 1, and then the transmission assembly is used to transmit the power of the output shaft of the driving motor to the rollers of frame 1, thereby realizing the walking of frame 1.

[0032] Since there may be large clods of soil or rocks in the peanut field, when the pressing plate 44 contacts the clods of soil or rocks, it will prevent the pressing plate 44 from continuing to move downward, resulting in a poor peanut seedling pressing effect. In order to solve this problem, in this embodiment, as shown in FIG. Figure 2 and Figure 3 As shown, the lifting end of the lifting mechanism 3 is rotatably connected to the connecting plate 41. Specifically, the lifting end of the lifting mechanism 3 is located in the middle position of the connecting plate 41, so that the connecting plate 41 can swing around the connecting shaft of the lifting end of the lifting mechanism 3, thereby reducing the influence of soil or stones on the pressing effect of the peanut seedlings.

[0033] In order to maintain the stability of the connecting plate 41 and the lifting end of the lifting mechanism 3, in this embodiment, Figure 2 and Figure 3 As shown, the cross section of the connecting plate 41 is rectangular, and a balancing seat 411 is provided on the top wall of the connecting plate 41, which is respectively located on both sides of the adapter shaft of the lifting end of the lifting mechanism 3, and also includes a plurality of springs 42 located on both sides of the axis of the adapter shaft, wherein one end of the spring 42 is enough to be hung on the balancing seat 411, and the other end of the spring 42 is hooked on the lifting rod of the lifting mechanism 3 to maintain the balance of the connecting plate 41.

[0034] It is worth noting that when the pressing plate 44 does not press the rice seedlings, Figure 3As shown, the springs 42 on both sides of the transfer shaft pull the connecting plate 41 to make the connecting plate 41 horizontal. When there are clods of earth or stones on the ground, if the clods of earth or stones are not directly below the transfer shaft of the lifting mechanism 3, the peanut seedlings will be pressed. At this time, the connecting plate 41 will flip around the axis of the transfer shaft of the lifting mechanism 3, so that the pressing plate 44 on the side flipped downward will be pressed on the seedlings again, reducing the impact of the clods of earth or stones on the seedlings.

[0035] In order to realize the lifting and lowering of the pressing mechanism 4, in this embodiment, Figure 2 and Figure 3 As shown, a horizontally arranged mounting frame 11 is fixedly installed on the frame 1, and a slide groove 111 is arranged on the mounting frame 11, wherein the lifting mechanism 3 includes a first motor 34, a screw rod 32, a sliding block 33 and a scissor mechanism 35, the first motor 34 is fixedly installed on the mounting frame 11, the screw rod 32 is arranged along the length direction of the slide groove 111, the output shaft of the first motor 34 is fixedly connected to one end of the screw rod 32, the sliding block 33 is slidably installed in the slide groove 111, and the side wall of the sliding block 33 is aligned with the side wall of the slide groove 111. The side wall is slidably connected, and the screw rod 32 is threadedly connected to the sliding block 33, wherein the scissor-fork mechanism 35 includes a positioning point 351 and a movable point 352 located on the same side, the positioning point 351 is rotationally connected to the bottom wall of the mounting frame 11, and the movable point 352 is rotationally connected to the sliding block 33, and the scissor-fork mechanism 35 is provided with a connection point 353 that overlaps with each other at one end away from the positioning point 351 or the movable point 352, wherein the connection point 353 is on the transfer shaft of the lifting mechanism 3, and the connection point 353 is rotationally connected to the connecting plate 41.

[0036] In order to enhance the installation stability of the screw rod 32 , in the present embodiment, a positioning seat 31 is further fixedly mounted on the mounting frame 11 , wherein the other end of the screw rod 32 is rotatably connected to the positioning seat 31 .

[0037] Through the above arrangement, the first motor 34 is utilized to drive the screw rod 32 to rotate. Since the side wall of the sliding block 33 is slidingly connected to the side wall of the sliding groove 111, the screw rod 32 is threadedly connected to the sliding block 33. Therefore, the sliding block 33 can slide in the sliding groove 111. Since the positioning point 351 of the scissors-fork mechanism 35 is rotationally connected to the mounting frame 11, the active point 352 is rotationally connected to the sliding block 33. By changing the distance between the positioning point 351 and the active point 352 through the movement of the sliding block 33, the opening and closing of the scissors-fork mechanism 35 can be controlled, thereby controlling the horizontal height of the connection point 353 on the scissors-fork mechanism 35 relative to the ground, thereby realizing the lifting and lowering of the pressing mechanism 4.

[0038] It is worth noting here that the scissor-type lifting mechanism 35 has the same structure as the conventional scissor-type lifting mechanism, and no improvement is made to the scissor-type lifting mechanism 35. Such a mechanism is well known to those skilled in the art, and the scissor-type lifting mechanism 35 will not be described in detail here.

[0039] Among them, the lifting mechanism 3 can also be replaced by a telescopic cylinder, so that the cylinder body of the telescopic cylinder is fixedly installed on the frame 1, and a switching shaft is installed at the end of the telescopic cylinder, and the switching shaft is rotatably connected to the connecting plate 41, so that the connecting plate 41 can be flipped around the switching shaft, wherein one end of the spring 42 is hooked on the balance seat 411, and the other end of the spring 42 can be hooked on the cylinder rod of the telescopic cylinder or the cylinder body of the telescopic cylinder.

[0040] It is worth noting that the spring 42 in this embodiment is a tension spring.

[0041] In order to increase the function of the seedling pressing device, such as Figure 1 As shown, a weeding mechanism 5 for weeding is also installed on the frame 1.

[0042] Specifically, Figure 4 As shown, in order to clamp the weeds, in this embodiment, the weeding mechanism 5 includes a gripping device 56 for gripping the weeds, wherein the gripping device 56 includes a fourth motor 561, a mounting platform 562 and two clamping claws 563 for gripping the weeds, wherein the fourth motor 561 is fixedly mounted on the mounting platform 562, and the tails of the two clamping claws 563 are provided with mutually meshing gear parts, wherein one of the clamping claws 563 is rotatably connected to the mounting platform 562, and the other clamping claw 563 is fixedly connected to the output shaft of the fourth motor 561.

[0043] Through the above arrangement, the fourth motor 561 is used to drive one of the clamping jaws 563 to rotate, and through the meshing relationship of the two clamping jaws 563, the two clamping jaws 563 can rotate in opposite or same directions to complete the clamping and releasing actions of the weeds.

[0044] In order to realize the installation of the grabbing device 56, in this embodiment, as shown in FIG. Figure 4 and Figure 5 As shown, the weeding mechanism 5 includes a lifting arm 57, wherein the mounting platform 562 is rotatably connected to the side wall of the lifting arm 57 via a fourth hinge point 5621, and the weeding mechanism 5 also includes a connecting seat 51, wherein the lifting arm 57 is rotatably connected to the connecting seat 51, and also includes a first adjusting mechanism 54 that drives the lifting arm 57 to lift and pull the weeds out of the soil.

[0045] Through the above arrangement, the first adjusting mechanism 54 is used to drive the lifting arm 57 to move, so that the lifting arm 57 can be raised and lowered, and the grabbing device 56 at the end of the lifting arm 57 is raised to a specified height, so as to facilitate the clamping of weeds.

[0046] Specifically, in this embodiment, Figure 4 and Figure 5As shown, the first adjustment mechanism 54 includes a swing arm 541, a connecting plate 542, a first pull rod 543, a second pull rod 544 and a third motor 53 for driving the swing arm 541 to rotate, wherein the third motor 53 is fixedly mounted on the connecting seat 51, the output shaft of the third motor 53 is fixedly connected to one end of the swing arm 541, the other end of the swing arm 541 is rotatably connected to the side wall of the lifting arm 57, and the position where the swing arm 541 intersects with the lifting arm 57 is defined as a first hinge point 5421, through which the connecting plate 542 is rotatably connected to the lifting arm 57, wherein the mounting platform 562 is also provided with a fifth Hinge point 5622, the connecting plate 542 also includes a second hinge point 5422 and a third hinge point 5423, wherein the first hinge point 5421, the second hinge point 5422 and the third hinge point 5423 are located at the three vertices of a triangle, one end of the first pull rod 543 is hinged to the second hinge point 5422 on the connecting plate 542, the other end of the first pull rod 543 is hinged to the fifth hinge point 5622, one end of the second pull rod 544 is hinged to the third hinge point 5423 on the connecting plate 542, and the other end of the second pull rod 544 is hinged to the connecting seat 51, wherein the connecting seat 51 is rotatably mounted on the frame 1.

[0047] With the above settings, Figure 5 As shown, the third motor 53 rotates, and since the swing arm 541 and the lifting arm 57 are hinged through the first hinge point 5421, the swing arm 541 and the lifting arm 57 rotate counterclockwise around the output shaft of the third motor 53 synchronously, and the lifting arm 57 and the grabbing device 56 are lowered downward, which is convenient for grabbing weeds. Since the first hinge point 5421, the second hinge point 5422 and the third hinge point 5423 in the connecting plate 542 are distributed in a triangle, one end of the second pull rod 544 is hinged to the third hinge point 5423, and the other end of the second pull rod 544 is hinged to the third hinge point 5423. One end is hinged to the connecting seat 51. At this time, the connecting plate 542 rotates counterclockwise around the axis of the first hinge point 5421. Here, the first pull rod 543 is driven to retreat to one side of the first hinge point 5421 through the connecting plate 542. Since the end of the first pull rod 543 is hinged to the fifth hinge point 5622, the mounting platform 562 can be driven by the first pull rod 543 to rotate counterclockwise around the fourth hinge point 5621, so that the grasping device 56 continues to flip downward, and the direction of the grasping device 56 is adjusted to facilitate the clamping of weeds.

[0048] When the grabbing device 56 reaches the designated position, Figure 4 As shown, the fourth motor 561 is used to drive the two clamping jaws 563 to unfold, and the weeds are placed between the two clamping jaws 563. Then, the fourth motor 561 is used again to control the clamping jaws 563 to clamp the weeds to achieve the weed grabbing.

[0049] In order to be able to pull the weeds out of the soil, in this embodiment, Figure 4and Figure 6 As shown, it also includes a second adjustment mechanism 55 for adjusting the angle of the lifting arm 57. Specifically, the second adjustment mechanism 55 includes a second motor 52, a cantilever 551 and a push rod 552, wherein the second motor 52 is fixedly mounted on the connecting seat 51, the output shaft of the second motor 52 is fixedly connected to one end of the cantilever 551, the other end of the cantilever 551 is hinged to the push rod 552, and the other end of the push rod 552 is hinged to an end of the lifting arm 57 away from the fourth hinge point 5621, wherein the hinge point between the push rod 552 and the lifting arm 57 and the fourth hinge point 5621 are respectively located on both sides of the first hinge point 5421.

[0050] With the above arrangement, when it is necessary to pull the weeds out of the soil, e.g. Figure 6 As shown, at this time, the second motor 52 drives the cantilever 551 to rotate, thereby driving the push rod 552 along Figure 6 Move in the direction of the arrow in the figure, and at this time make the lifting arm 57 flip upward around the first hinge point 5421, so that the weeds can be pulled out of the soil.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A seedling pressing device, comprising a frame (1) and a walking mechanism (2) for driving the frame (1) to move, characterized in that: The frame (1) is provided with a pressing mechanism (4) for pressing the seedlings and a lifting mechanism (3) for driving the pressing mechanism (4) to move up and down. The pressing mechanism (4) comprises a connecting plate (41), a pressing plate (44), a plurality of guide rods (43) and a compression spring (45), wherein the guide rod (43) is fixedly mounted on the connecting plate (41) and extends vertically downward, the pressing plate (44) is sleeved on the outer side of the guide rod (43) and is slidably connected to the peripheral wall of the guide rod (43), the compression spring (45) is sleeved on the outer side of the guide rod (43), one end of the compression spring (45) abuts against the bottom wall of the connecting plate (41), and the other end of the compression spring (45) abuts against the top wall of the pressing plate (44), and the lifting end of the lifting mechanism (3) is connected to the top wall of the connecting plate (41).

2. A seedling pressing device according to claim 1, characterized in that: It also includes a central control unit and a distance sensor (46), wherein the distance sensor (46) is fixedly mounted on the connecting plate (41), and the detection end of the distance sensor (46) points to the pressing plate (44), and the distance sensor (46) and the driving source of the lifting mechanism (3) are both electrically connected to the central control unit.

3. A seedling pressing device according to claim 1 or 2, characterized in that: The lifting mechanism (3) comprises a first motor (34), a screw rod (32), a slide groove (111) arranged on a frame (1), a sliding block (33) and a scissor-fork mechanism (35), wherein the screw rod (32) is arranged along the length direction of the slide groove (111), the output end of the first motor (34) is fixedly connected to the screw rod (32), the side wall of the sliding block (33) is slidably connected to the side wall of the slide groove (111), the screw rod (32) is threadedly connected to the sliding block (33), and the scissor-fork mechanism (35) comprises a positioning point (351) hinged to the frame (1) and an active point (352) hinged to the sliding block (33), the positioning point (351) and the active point (352) are located at the same end of the scissor-fork mechanism (35), and the end of the scissor-fork mechanism (35) away from the positioning point (351) or the active point (352) is provided with a transfer shaft rotatably connected to the connecting plate (41).

4. A seedling pressing device according to claim 3, characterized in that: A mounting frame (11) is fixedly mounted on the frame (1), a slide groove (111) is arranged on the mounting frame (11), a lifting mechanism (3) is mounted on the mounting frame (11), and a positioning point (351) is hinged to a bottom wall of the mounting frame (11).

5. A seedling pressing device according to claim 4, characterized in that: A positioning seat (31) is fixedly provided on the mounting frame (11), and the end of the screw rod (32) is rotatably connected to the positioning seat (31).

6. A seedling pressing device according to claim 3, characterized in that: The connecting plate (41) is provided with a balancing seat (411) located on both sides of the transfer shaft, and also includes a spring (42) located on both sides of the transfer shaft and symmetrical about the axis of the transfer shaft, one end of the spring (42) is connected to the balancing seat (411), and the other end of the spring (42) is connected to the scissor mechanism (35).

7. A seedling pressing device according to claim 1 or 2, characterized in that: The lifting mechanism (3) comprises a telescopic cylinder, the cylinder body of the telescopic cylinder is fixedly connected to the frame (1), the telescopic rod of the telescopic cylinder is provided with a transfer shaft rotatably connected to the connecting plate (41), the top wall of the connecting plate (41) is provided with a balancing seat (411) located on both sides of the transfer shaft, and also comprises a spring (42), one end of the spring (42) is hooked on the balancing seat (411), and the other end of the spring (42) is hooked on the telescopic rod of the telescopic cylinder.

8. A seedling pressing device according to claim 7, characterized in that: The spring (42) is a tension spring.

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