Variable eccentricity compensation type well cellar hole forming and tobacco seedling transplanting machine

Abstract

A variable eccentricity compensated well-drilling tobacco seedling transplanter includes a slide rod, duckbill transplanters and a drilling tool located at both ends of the slide rod. The slide rod slides along a track at the lower end of a vertical rod, and a drive assembly is connected to the slide rod. The drive assembly includes a parallel four-bar linkage and a crank mechanism. The lower end of the vertical rod in the parallel four-bar linkage has a track, and a main drive rod and a driven drive rod are connected to the parallel four-bar linkage. The crank mechanism includes a third crank and a connecting rod that are hinged to each other. The second ends of the third crank and the connecting rod are respectively connected to a first crank and a drill bit mounting bracket. This utility model discloses a well-drilling tobacco seedling transplanter with a simple structure. By using only the drive assembly to move the slide rod along the track, it can compensate for the horizontal displacement of the lower half of the drilling tool's trajectory, thereby ensuring the quality of well-drilling, avoiding the problem of excessively large hole openings, and ensuring the subsequent growth of tobacco seedlings.

Description

Technical Field

[0001] This utility model belongs to the field of tobacco seedling transplanting technology, and in particular relates to a variable eccentricity compensation well-cellar tobacco seedling transplanting machine. Background Technology

[0002] Transplanting tobacco seedlings is an important step in the tobacco seedling planting process. It involves transplanting the cultivated tobacco seedlings into the tobacco field. Currently, the most common method for planting tobacco seedlings is the well-cellar planting method. Its core is to create vertical caves in the soil that resemble wells to achieve efficient root development and enhance the stress resistance of the tobacco seedlings.

[0003] When transplanting tobacco seedlings in pits, pits need to be dug in the tobacco field first, and then the seedlings need to be transplanted into the pits. The most important part of these two processes is the pit-forming process. Currently, there are two methods for pit-forming: manual drilling and mechanical drilling. Manual tools can only drill about one acre per day, which is still relatively slow, and they can only drill holes, not perform the subsequent seedling placement. Mechanical drilling, on the other hand, integrates rotary drilling and seedling placement, achieving an efficiency of 0.5-2 acres per hour, greatly improving transplanting efficiency.

[0004] Patent document CN221449078U discloses a traction-type hole-drilling, fertilizing, and watering integrated machine for transplanting tobacco seedlings in a well-cellar configuration. The machine includes a tractor and a traction frame connected to the tractor. A ground wheel is connected to the bottom of the traction frame. From front to back, the traction frame is equipped with a hole-drilling unit, a watering unit, and a fertilizing unit. The hole-drilling unit includes a transplanting box and a well-cellar drilling bit connecting frame connected to the transplanting box. The well-cellar drilling bit connecting frame is equipped with a drilling motor and a well-cellar drilling bit connected to the output shaft of the drilling motor, with the well-cellar drilling bit facing downwards. A transmission gear is installed inside the transplanting box, and the ground wheel is connected to the transmission gear. The transmission gear drives the well-cellar drilling bit connecting frame to reciprocate vertically. The integrated machine for drilling holes, watering, and fertilizing described in this utility model has complete functions. During the hole-drilling process, drilling and hole-expanding are carried out simultaneously, and the drilled holes are easy to adjust, making it applicable to a wider range of situations. At the same time, this integrated machine has high operating efficiency and better results, avoiding human factors in manual work and effectively improving the effect of well-cellar transplanting of tobacco seedlings.

[0005] However, during the process of creating planting holes, the drilling tool of this type of tobacco seedling transplanter will have a downward movement relative to the soil and a horizontal movement due to the forward movement of the vehicle. This movement will cause the diameter of the planting hole to increase, resulting in the collapse or emptiness of the hole opening, which will affect the subsequent growth of tobacco seedlings. Utility Model Content

[0006] The present invention aims to provide a simple and effective variable eccentricity compensation well-cellar tobacco seedling transplanter.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a variable eccentricity compensated well-drilling tobacco seedling transplanter, including a slide rod, a duckbill transplanter and a drilling tool set at both ends of the slide rod; a drive assembly is connected to the slide rod, the drive assembly includes a parallel four-bar linkage and a crank mechanism, the parallel four-bar linkage includes a vertical rod, the lower end of the vertical rod is provided with a slide rail, and the slide rod is slidably set on the slide rail; a main drive rod and a driven drive rod are connected to the parallel four-bar linkage; the crank mechanism includes a third crank and a connecting rod that are hinged to each other, the second end of the connecting rod is connected to a drill bit mounting bracket, the drilling tool is installed on the drill bit mounting bracket, and the drill bit mounting bracket is fixed to the slide rod; the second end of the third crank rotates under the drive of the main drive rod.

[0008] The parallel four-bar linkage includes a vertical bar, a first transmission bar, a second transmission bar, a first crank, and a second crank. The main drive bar and the driven drive bar are fixedly connected to the first crank and the second crank, respectively. The vertical bar is fixedly connected to a slide rail. The first transmission bar and the second transmission bar are arranged in parallel, and the first ends of the first transmission bar and the second transmission bar are respectively hinged to the two ends of the vertical bar. The first ends of the first crank and the second transmission bar are respectively hinged to the first ends of the first crank and the second crank. The second ends of the first crank and the second crank are respectively fixedly connected to the main drive bar and the driven drive bar, respectively.

[0009] Both the first crank and the second crank have a crank mounting elongated hole at their first ends, and the elongated hole contains a spline. The second ends of the first transmission rod and the second transmission rod are respectively fixedly connected to the crank mounting elongated holes of the first crank and the second crank. The second ends of the first transmission rod and the second transmission rod also contain splines, and the second ends of the first transmission rod and the second transmission rod can change position within the elongated hole.

[0010] The third crank and the first transmission rod are fixedly connected.

[0011] Counterweights are provided at the second ends of both the first and second cranks.

[0012] There are two sliding rods, which slide in the track at the lower end of the vertical rod.

[0013] The slide bar is fixedly connected to the drill bit mounting bracket.

[0014] The duckbill transplanter and the hole drill are located at both ends of the slide bar, so the distance between them is the plant spacing, and their absolute and relative movement trajectories are consistent.

[0015] It also includes a vehicle body, on which a power unit is installed, and a main drive rod is connected to the power unit; a driven drive rod is rotatably mounted on the vehicle body.

[0016] The vehicle body is equipped with a water tank, and a water pipe is connected to the water tank, with the outlet of the water pipe facing downwards.

[0017] The vehicle is equipped with a towing frame.

[0018] The vehicle body is equipped with drive wheels, which are driven by a power unit. Tracks are located at the bottom of the vehicle body, and the drive wheels drive the tracks to move.

[0019] Through the above technical solutions, the technical effects of this utility model are as follows: 1. The structure of this mechanism is simple. It only uses the drive component to drive the sliding rod to move on the slide rail, which can compensate for the horizontal displacement of the lower half of the drilling tool's movement trajectory, thereby ensuring the quality of the hole formation, avoiding the problem of excessively large well holes, and also ensuring the subsequent growth of tobacco seedlings. In actual use, the reciprocating sliding of the sliding rod in the slide rail forms relative motion compensation. When the drilling tool drills, it is pulled back by the sliding rod before the drill bit reaches the lowest point; after the drill bit passes the lowest point, it is pushed forward by the sliding rod. 2. The movement of the sliding rod is achieved by the third crank driving the connecting rod and the drill bit mounting bracket, and the drill bit mounting bracket is fixedly connected to the sliding rod. The installation of the third crank in the transplanting mechanism is designed to avoid interference with the movement of other components. The actual rotation center of the third crank is the position where the first crank and main drive rod are fixed. The actual length of the third crank is the distance between the position where the first crank and main drive rod are fixed and the first end of the connecting rod. Crucially, the vertical distance between the position where the first crank and main drive rod are fixed and the first end of the connecting rod is constantly changing; this distance is called the eccentricity. This allows the slide to compensate for the forward and backward movement after the transplanter reaches its lowest point, ensuring the drill bit moves vertically and reducing the increase in the size of the hole opening during horizontal movement. 2. Using only cranks, connecting rods, slide rods, slides, and drive components results in low cost, simple equipment, and ease of implementation. This also makes the overall tobacco seedling transplanter relatively small, allowing for convenient installation on a vehicle. 3. The elongated crank mounting holes facilitate adjustment of the effective lengths of the first and second cranks, thereby achieving optimal plant spacing. 4. The parallel four-bar linkage ensures the horizontal state of the slide and the sliding rod, thus guaranteeing the effectiveness of the drill and the duckbill transplanter. 5. The third crank and connecting rod restrict the sliding of the slide on the sliding rod, causing the drill to be pulled back by the sliding rod before reaching the lowest point, and then pushed back by the sliding rod after the drill bit has passed the lowest point. This results in an approximately Y-shaped absolute motion trajectory for the drill, with the lower half of the trajectory converging inwards. As the vehicle moves, it can descend to the ground with only vertical movement relative to the ground, remaining stationary horizontally, thus improving the well-forming effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 Rear view;

[0022] Figure 3 for Figure 1 Left view;

[0023] Figure 4 for Figure 1 Top view;

[0024] Figure 5 for Figure 1 3D diagram;

[0025] Figure 6 for Figure 5 Schematic diagram after rotation;

[0026] Figure 7 This is a schematic diagram of a cocycloid.

[0027] Figure 8 This is a diagram showing the motion trajectory of the drilling tool of this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of Example 2;

[0029] Figure 10 for Figure 9 Schematic diagram of the CRRC body structure

[0030] Figure 11 This is a schematic diagram of the structure of Example 6.

[0031] 1-Slide rod, 2-Vertical rod, 3-Second crank, 4-Counterweight, 5-Drilling tool, 6-Duckbill transplanter, 7-First crank, 8-Third crank, 9-Connecting rod, 10-Slide track, 11-First transmission rod, 12-Main drive rod, 13-Second transmission rod, 14-Driven drive rod, 15-Vehicle body, 16-Ridge, 17-Water tank, 18-Crawler, 19-Power source, 20-Traction frame, 21-Crank mounting hole, 22-Drill bit mounting bracket, 23-Water inlet, 24-Battery box, 25-Sprocket, 26-First sprocket, 27-Chain, 28-Second sprocket, 29-Third sprocket, 30-Soft water pipe. Detailed Implementation

[0032] Example 1: Variable Eccentricity Compensation Well-Cavity Tobacco Seedling Transplanter. This machine is mainly used for transplanting tobacco seedlings. It is relatively flexible in use and can be directly installed on a suitable vehicle body 15. The vehicle body 15 moves between ridges 16, thereby completing the well-cavity digging on the ridges during the movement and simultaneously placing the tobacco seedlings into the well-cavity holes.

[0033] The duckbill transplanter 6 and the hole drill 5 used in this tobacco seedling transplanter are both mature existing technologies. This embodiment does not involve any improvement to these parts, and they can be purchased directly.

[0034] like Figures 1-6As shown, the tobacco seedling transplanter includes a slide bar 1, which is set along the length direction. A duckbill transplanter 6 and a hole drill 5 are fixedly set at both ends of the slide bar 1, respectively. As mentioned above, commercially available products can be directly selected for the duckbill transplanter 6 and the hole drill 5.

[0035] For ease of use, a drill bit mounting bracket 22 is installed at the end of the slide rod 1. The drill bit 5 can be installed on the drill bit mounting bracket 22.

[0036] In this embodiment, the duckbill transplanter 6 and the hole drill 5 are directly fixed on the slide bar 1, and the distance between them is the plant spacing during the transplanting process.

[0037] To ensure stability, there are two slide bars 1 in this embodiment, and the two slide bars 1 are arranged in parallel.

[0038] The slide bar 1 is installed on the slide rail 10 and passes through the slide rail. At the same time, the slide rail 10 is located on the vertical bar 2.

[0039] To move the slide bar 1, a drive assembly is installed on the slide rail 10. The drive assembly includes a parallel four-bar linkage and a crank mechanism. The parallel four-bar linkage includes a vertical bar 2, the lower end of which is connected to the slide rail 10. A main drive rod 12 and a driven drive rod 14 are connected to the parallel four-bar linkage. The main drive rod 12 is used to connect to the power unit, and the driven drive rod 14 is used to connect to the vehicle body 15. The crank mechanism includes a third crank 8 and a connecting rod 9 that are hinged to each other. The second end of the connecting rod 9 is hinged to the drill bit mounting bracket 22, which is fixedly connected to the slide bar 1. The second end of the third crank 8 rotates under the drive of the main drive rod 12.

[0040] The parallel four-bar linkage ensures that the slide bar 1 remains horizontal. Driven by the parallel four-bar linkage, the relative motion trajectory of the slide bar 1 is circular; under absolute motion, it exhibits a cocycloidal shape, such as... Figure 7 As shown, we can see that the excess cycloid will cause the opening of the hole to enlarge.

[0041] The crank mechanism provides trajectory compensation for the relative movement of the slide rod 1 on the slide rail 10, resulting in a relative elliptical trajectory for the drill 5 and an approximately "Y"-shaped absolute motion. Figure 8 As shown, this meets the requirements for well-cellar tobacco transplanting, while avoiding excessively wide openings in the well-cellar pits.

[0042] Specifically, the parallel four-bar linkage also includes a first transmission rod 11, a second transmission rod 13, a first crank 7, and a second crank 3. The first crank 7 and the second crank 3 are of the same length and are parallel to each other. The main drive rod 12 and the driven drive rod 14 are fixedly connected to the first crank 7 and the second crank 3, respectively. The first transmission rod 11 and the second transmission rod 13 are arranged in parallel, and the first ends of the first transmission rod 11 and the second transmission rod 13 are respectively hinged to the two ends of the vertical rod 2. The second ends of the first transmission rod 11 and the second transmission rod 13 are respectively fixedly connected to the first ends of the first crank 7 and the second crank 3. The second ends of the first crank 7 and the second crank 3 are respectively fixedly connected to the main drive rod 12 and the driven drive rod 14.

[0043] The vertical rod 2, the first crank 7, and the second crank 3 together form a parallel four-bar linkage, which ensures the vertical state of the vertical rod 2, thereby ensuring the horizontal state of the slide rod 1. This allows the duckbill transplanter 6 and the drilling tool 5 to maintain horizontal stability during lateral movement, avoiding inconsistent well depths due to deformation of the slide rod 1 or unstable movement.

[0044] To ensure the movement of the crank mechanism, the third crank 8 and the first transmission rod 11 are fixedly connected. As the first transmission rod 11 rotates, the third crank 8 also rotates. Through the movement of the third crank 8 and the connecting rod 9, the drill is pulled back before reaching the lowest point. After leaving the lowest point, it is pushed out. As a result, the slide rod 1 forms a state of near-stationary in the horizontal direction relative to the ground during the descent. Ultimately, the trajectory of the drill 5 is approximately γ-shaped. When it contacts the ground, the drive assembly compensates for the forward movement speed of the vehicle body 15. The drill 5 only drills holes downward relative to the ground, thereby avoiding the drilling holes having an excessively large diameter and improving the subsequent growth effect of tobacco seedlings.

[0045] In this embodiment, the third crank 8 introduces power to the connecting rod 9. The third crank 8 passes through the slide rail 10, which realizes the introduction of power and cleverly solves the problem of mechanical interference.

[0046] In addition, in this embodiment, the actual rotation center of the third crank 8 is the fixed position of the first crank 7 and the main drive rod 12, and the actual length of the third crank 8 is the distance between the fixed position of the first crank 7 and the main drive rod 12 and the first end of the connecting rod 9. The most crucial point is that the vertical distance between the fixed position of the first crank 7 and the main drive rod 12 and the first end of the connecting rod 9 is constantly changing. This distance is called the eccentricity. In this way, the slide 10 can have a front-to-back compensation after the entire transplanter reaches the lowest point, so that the drill 5 can be approximately straight up and down, reducing the increase in the size of the well opening of the drill 5 in the horizontal movement of the drill 5, so that the drill 5 and the duckbill transplanter 6 can approximately achieve straight up and down operation.

[0047] When in operation, the main drive rod 12 is connected to the power unit, which can drive the slide rod 1 to rise and fall in the vertical direction, while providing compensation for its movement in the horizontal direction.

[0048] To ensure the stability of the operation of the first crank 7 and the second crank 3, counterweights 4 are provided at the second ends of both the first crank 7 and the second crank 3. Commercially available products can be used for the counterweights 4.

[0049] The working process is as follows: the tobacco seedling transplanter is installed on the vehicle body 15, and the vehicle body 15 itself moves in the tobacco field; at the same time, the power unit drives the main drive rod 12 to rotate.

[0050] The main drive rod 12 rotates, and the first crank 7 makes a circular motion around the main drive rod 12; at the same time, the second crank 3 makes a circular motion around the auxiliary drive rod, thereby driving the slide rod 1 to make a circular motion. The third crank 8 and the connecting rod 9 cause the slide rod 1 to slide relative to each other in the slide rail 10, so that the lower half of the movement trajectory of the slide rod 1 is drawn inward, which cancels the movement of the vehicle body 15, making it stationary with respect to the ground in the horizontal direction in the lower half of the movement trajectory. This improves the well-forming effect and avoids the well opening being too large.

[0051] To achieve better hole formation results, Table 1 provides the relevant design parameters when the plant spacing is 550mm:

[0052] Table 1. Relevant design parameters when plant spacing is 550mm

[0053]

[0054] In the implementation of this application, the length of the first crank 7 can be directly changed without replacing the crank mechanism, thereby realizing the adjustment of the plant spacing, which is convenient.

[0055] This application is easy to use and allows for changes in the installation positions of the first transmission rod 11 and the second transmission rod 13 relative to the first crank 7 and the second crank 3, thereby easily adjusting the effective lengths of the first crank 7 and the second crank 3 and thus changing the plant spacing. For example, if the installation positions of the first transmission rod 11 and the second transmission rod 13 relative to the first crank 7 and the second crank 3 are moved towards the counterweight 4, the effective lengths of the first crank 7 and the second crank 3 will be shortened, and the plant spacing can be reduced.

[0056] To facilitate adjustment, a crank mounting elongated hole 21 is provided at the first end of the first crank 7 and the second crank 3. The first transmission rod 11 and the second transmission rod 13 are rotatably connected in the crank mounting elongated hole 21. Thus, during adjustment, by adjusting the position of the first transmission rod 11 and the second transmission rod 13 in the crank mounting elongated hole 21, the actual length of the first crank 7 and the second crank 3 can be adjusted, thereby changing the plant spacing, as shown in Table 2.

[0057] The first transmission rod 11 and the second transmission rod 13 are fixedly connected in the crank mounting elongated hole 21. The positions of the first transmission rod 11 and the second transmission rod 13 in the crank mounting elongated hole 21 are adjustable. If the plant spacing needs to be adjusted, the positions of the first transmission rod 11 and the second transmission rod 13 in the elongated hole are adjusted. After the adjustment is completed, the sleeve is fixed in the crank mounting elongated hole 21. Subsequently, during use, the positions of the first transmission rod 11 and the second transmission rod 13 relative to the crank mounting elongated hole 21 can be changed to adjust the actual length of the first crank 7 and the second crank 3.

[0058] Table 2 illustrates how, in this embodiment, changing the effective lengths of the first and second cranks achieves the well-cellar formation effect during implementation:

[0059] Table 2 Relationship between plant spacing and effective length of the first crank.

[0060]

[0061] Example 2, the difference between this example and Example 1 is as follows: Figure 9 and Figure 10 As shown, this tobacco seedling transplanter also includes a water tank 17 mounted on the vehicle body, with a water pipe connected to the water tank 17, the outlet of which faces downwards. By providing the water pipe, water can be conveniently injected into the transplanted seedling holes after transplanting.

[0062] The duckbill transplanter 6 is provided with a water inlet, and a soft water pipe 30 is connected to the water tank 17, with the end of the soft water pipe 30 connected to the water inlet.

[0063] A valve is connected to the soft water pipe 30. When the duckbill transplanter 6 reaches the lowest point, the water valve opens, and the water in the water tank 17 flows through the inlet hole and the valve into the duckbill transplanter 6, and then flows out through the duckbill transplanter. In this way, water is injected into the tobacco seedling hole immediately after the seedlings are planted, which improves the survival rate of the tobacco seedlings.

[0064] The valve is a mature existing technology. In this embodiment, the control of the duckbill transplanter 6 is not involved, as this is also a mature existing technology. The control of the valve is also a mature existing technology.

[0065] Example 3 differs from Example 1 in that the driven drive rod 14 is rotatably connected to the vehicle body 15, and the main drive rod 12 is connected to the power unit. Specifically, the driven drive rod 14 is rotatably connected to the vehicle body 15 via a bearing.

[0066] The main drive rod 12 is connected to the power unit via the transmission chain 18.

[0067] Example 4 differs from Example 3 in that the power unit includes an electric motor, which is fixedly mounted on the vehicle body 15.

[0068] Example 5, the difference between this example and Example 1 is as follows: Figure 9 As shown, the vehicle body 15 is equipped with a towing frame 20. In subsequent use, an external tractor is connected to the towing frame 20, so that the tractor can move the vehicle body 15 through the towing frame 20.

[0069] Meanwhile, a transmission box 24 is installed on the vehicle body 15. The power of the moving wheel during rotation is transmitted to the main drive rod 12 through the transmission box 24 via chain drive.

[0070] The specific implementation is as follows: A movable wheel is provided at the bottom of the vehicle body 15, and a sprocket 25 is connected to the movable wheel. A first sprocket 26 is provided on the transmission box 24, and the first sprocket 26 and sprocket 25 are driven by a chain 27. Simultaneously, a second sprocket 28 and a third sprocket 29 are provided inside the transmission box 24. The second sprocket 28 is connected to the first sprocket 26 via a drive shaft, and the second sprocket 28 and the third sprocket 29 are driven by a chain. In this embodiment, the second sprocket 28 is connected to the main drive rod 12, and the third sprocket 29 is connected to the driven drive rod 14.

[0071] The vehicle body 15 moves under the drive of the tractor. The power is transmitted to the sprocket 25 through the moving wheel, and the sprocket 25 transmits the power to the first sprocket 26. The first sprocket 26 transmits the power to the second sprocket 28, and the second sprocket 28 transmits the power to the third sprocket 29 through the chain.

[0072] Example 6, the difference between this example and Example 1 is as follows: Figure 11 As shown, the vehicle body 15 is equipped with drive wheels and a power source 19. The power source 19 drives the drive wheels to rotate, and the drive wheels drive the vehicle body 15 to move. For further description, in this embodiment, tracks are installed at the bottom of the vehicle body 15. The drive wheels drive the tracks, and the tracks drive the vehicle body 15 to move.

[0073] In this embodiment, the power source 19 can be a motor or an engine, which provides mechanical energy to the drive wheel, thereby driving the drive wheel to rotate.

[0074] This utility model discloses a tobacco seedling transplanter. The structure of this mechanism is simple. It only uses the drive component to drive the relative movement of the slide rod in the slide, which can compensate for the displacement of the lower half of the drilling tool's movement trajectory in the horizontal direction, thereby ensuring the quality of the well and avoiding the problem of the well being too large, and also ensuring the subsequent growth of tobacco seedlings.

Claims

1. A variable eccentricity compensation type well-cellar tobacco seedling transplanter, characterized in that: The device includes a slide rod, a duckbill transplanter and a hole drill at both ends of the slide rod; a drive assembly is connected to the slide rod, the drive assembly includes a parallel four-bar linkage and a crank mechanism, the parallel four-bar linkage includes a vertical bar, the lower end of the vertical bar is provided with a slide rail, and the slide rod is slidably mounted on the slide rail; a main drive rod and a driven drive rod are connected to the parallel four-bar linkage; the crank mechanism includes a third crank and a connecting rod that are hinged to each other, the second end of the connecting rod is connected to a drill bit mounting bracket, the hole drill is mounted on the drill bit mounting bracket, and the drill bit mounting bracket is fixed to the slide rod; the second end of the third crank rotates under the drive of the main drive rod.

2. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 1, characterized in that: The parallel four-bar linkage also includes a first transmission rod, a second transmission rod, a first crank, and a second crank. The main drive rod and the driven drive rod are fixedly connected to the first crank and the second crank, respectively. The vertical rod is integrally fixedly connected to the slide rail. The first transmission rod and the second transmission rod are arranged in parallel, and the first ends of the first transmission rod and the second transmission rod are respectively hinged to the two ends of the vertical rod. The first ends of the first crank and the second transmission rod are respectively hinged to the first ends of the first crank and the second crank. The second ends of the first crank and the second crank are respectively fixedly connected to the main drive rod and the driven drive rod.

3. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 2, characterized in that: Both the first crank and the second crank have crank mounting holes at their first ends, and the second ends of the first transmission rod and the second transmission rod are respectively hinged into the crank mounting holes of the first crank and the second crank.

4. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 3, characterized in that: The third crank and the first transmission rod are fixedly connected.

5. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 4, characterized in that: Counterweights are provided at the second ends of both the first and second cranks.

6. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 5, characterized in that: There are two sliding rods, with two tracks at the bottom of the vertical rods, and the two sliding rods slide parallel to each other in the tracks.

7. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in any one of claims 1 to 6, characterized in that: It also includes the vehicle body, with the power unit mounted on the vehicle body, the main drive rod connected to the power unit, and the driven drive rod rotatably mounted on the vehicle body.

8. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 7, characterized in that: The vehicle body is equipped with a water tank, and a water pipe is connected to the water tank, with the outlet of the water pipe facing downwards.

9. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 7, characterized in that: The vehicle is equipped with a towing frame.

10. The variable eccentricity compensation type well-cellar tobacco seedling transplanter as described in claim 7, characterized in that: The vehicle body is equipped with drive wheels, which are driven by a power unit. Tracks are located at the bottom of the vehicle body, and the drive wheels drive the tracks to move.

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