Bidirectional compensation type tobacco seedling transplanting mechanism

Abstract

A bidirectional compensation type tobacco seedling transplanting mechanism comprises a vehicle body which is provided with a power assembly, a planting device and a well cellar hole forming drill bit. The power assembly comprises a main power shaft, a first non-circular gear, a second non-circular gear and a gearbox shell, and the first non-circular gear and the second non-circular gear are both arranged in the gearbox shell. The first non-circular gear is fixedly arranged relative to the vehicle body; the main power shaft drives the gearbox shell to rotate relative to the vehicle body; the second non-circular gear is meshed with the first non-circular gear; the second non-circular gear is connected with a crank; the crank is connected with a first / second connecting rod, the tail ends of the first connecting rod and the second connecting rod are arranged on the framework in a sliding manner, and the well cellar cavitation drill bit and the planting device are connected to the tail ends of the first connecting rod and the second connecting rod respectively. According to the bidirectional compensation type tobacco seedling transplanting mechanism, the hole forming quality and the seedling falling success rate are improved, the well cellar depth and the hole opening size conform to the agricultural requirements of tobacco seedling growth, the heat preservation effect of tobacco seedlings in the early growth stage can be guaranteed, and the survival rate of the tobacco seedlings is improved.

Description

Technical Field

[0001] This utility model belongs to the field of tobacco seedling transplanting technology, and in particular relates to a bidirectional compensation tobacco seedling transplanting mechanism. Background Technology

[0002] To cultivate tobacco, seedlings must first be nurtured. The nurtured seedlings are then transplanted, with the most common method being pit transplanting. Pit transplanting involves first digging holes in the tobacco field, then filling the holes with water, and finally placing the seedlings into the holes to complete the transplanting process. Pit transplanting results in a high seedling survival rate.

[0003] However, the well-cellar transplanting process is cumbersome. Currently, the commonly used well-cellar transplanting involves manual drilling, manual watering, and manual seedling placement, which is labor-intensive, inconsistent in quality, and extremely inefficient.

[0004] To address the aforementioned technical issues, existing technologies provide automated tobacco seedling transplanting solutions. Patent document CN221449078U discloses a traction-type hole-drilling, fertilizing, and watering integrated machine for well-cell transplanting of tobacco seedlings, comprising a tractor and a traction frame connected to the tractor; a ground wheel is connected to the bottom of the traction frame; the traction frame is equipped with a hole-drilling unit, a watering unit, and a fertilizing unit arranged sequentially from front to back; the hole-drilling unit includes a transplanting box and a well-cell drilling drill bit connecting frame connected to the transplanting box; the well-cell drilling drill bit connecting frame is equipped with a drilling motor and a well-cell drilling drill bit connected to the output shaft of the drilling motor, with the well-cell drilling drill bit facing downwards; a transmission gear is provided inside the transplanting box, and the ground wheel is connected to the transmission gear; the transmission gear drives the well-cell drilling drill bit connecting frame to reciprocate vertically. The integrated machine for drilling holes, watering, and fertilizing described in this invention has complete functions. During the drilling process, drilling and enlarging of holes 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 labor and effectively improving the effect of well-cellar transplanting of tobacco seedlings.

[0005] However, this method can cause ridge scraping when drilling holes for tobacco seedlings. Specifically, the drill bit may begin to move horizontally before it has fully emerged from the hole, or it may begin to descend vertically before reaching the desired horizontal position. In such cases, the drill bit damages the ridge surface, enlarging the hole opening.

[0006] The scraping of ridges can damage the ridge surface and cause soil backflow after the holes are dug. When the tobacco seedlings fall into the pits, they will not be at the lowest point of the pits, which may affect the root development and survival rate of the seedlings later.

[0007] Secondly, it does not meet the agronomic requirements for transplanting in pits; if the pit opening is too large, the leaves of the tobacco seedlings will grow close to the ground in the early stage, and the leaves that grow close to the ground will die due to the excessively high ground temperature during the growth process.

[0008] In summary, there is an urgent need for a tobacco seedling transplanter that can achieve better transplanting results. Utility Model Content

[0009] The present invention aims to provide a bidirectional compensation tobacco seedling transplanting mechanism with simple structure and good performance.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bidirectional compensation tobacco seedling transplanting mechanism, including a vehicle body, on which a power component, a planting device, a well-drilling drill bit and a horizontally arranged frame are provided;

[0011] The power assembly includes a drive shaft, a first non-circular gear, a second non-circular gear, and a gearbox housing. The drive shaft is rotatably mounted on the vehicle body. Both the first and second non-circular gears are non-circular gears. Both the first and second non-circular gears are housed within the gearbox housing.

[0012] The first non-circular gear is fixed relative to the vehicle body;

[0013] The main drive shaft drives the gearbox housing to rotate relative to the vehicle body;

[0014] The second non-circular gear is rotatably disposed inside the gearbox housing, and the second non-circular gear meshes with the first non-circular gear;

[0015] A horizontally positioned crank is connected to the second non-circular gear;

[0016] A first connecting rod and a second connecting rod are connected to the crank. The planes of the first and second connecting rods are parallel. The ends of the first and second connecting rods are slidably mounted on the frame. The well drilling bit and the planting device are respectively connected to the ends of the first and second connecting rods.

[0017] The frame is a parallel four-bar linkage. A first power shaft and a first auxiliary shaft are horizontally arranged on the vehicle body. The main power shaft drives the first power shaft to rotate. The first power shaft and the first auxiliary shaft are parallel to each other and at the same height. The first power shaft and the first auxiliary shaft are rotatably mounted on the vehicle body and are respectively connected to the front and rear of the frame.

[0018] The second drive shaft is connected to the gearbox housing by a pin. The main drive shaft drives the second drive shaft to rotate, and the gearbox housing rotates together with the second drive shaft under the action of the pin.

[0019] The main drive shaft transmits power to the first drive shaft via chain drive.

[0020] The frame is equipped with a first rocker arm, a second rocker arm, a third rocker arm, and a fourth rocker arm. The frame also has a second auxiliary shaft and a third auxiliary shaft. The first ends of the first, second, third, and fourth rocker arms are rotatably connected to the frame. The first rocker arm is connected to the first power shaft and rotates under the drive of the first power shaft. The second ends of the second, third, and fourth rocker arms are rotatably connected to the first, second, and third auxiliary shafts, respectively.

[0021] The frame includes a longitudinal frame and a transverse frame, and the frame is equipped with a slide rail parallel to the longitudinal frame.

[0022] The first and second connecting rods are respectively equipped with a first slider and a second slider that are horizontally arranged, and both the first slider and the second slider are slidably arranged on the slide rail; the planting device and the well drilling bit are respectively connected to the first slider and the second slider.

[0023] The crank includes two fixedly connected sub-cranks with parallel axes. The first ends of the first connecting rod and the second connecting rod are rotatably connected to the two sub-cranks, respectively. The second ends of the first connecting rod and the second connecting rod are rotatably connected to the first slider and the second slider, respectively. The first slider and the second slider slide linearly on the longitudinal frame.

[0024] A bearing is installed inside the gearbox housing, and the second non-circular gear is rotatably connected to the gearbox housing through the bearing; during the meshing process of the second non-circular gear and the first non-circular gear, the center distance between the first non-circular gear and the second non-circular gear remains unchanged.

[0025] It also includes a second power shaft, which is driven by the main power shaft to rotate. A bearing is installed in the bore of the first non-circular gear, and the second power shaft is rotatably connected to the first non-circular gear through the bearing. The gearbox housing is fixedly connected to the second power shaft. The second power shaft drives the gearbox housing to rotate coaxially and synchronously.

[0026] Through the above technical solutions, the technical effects of this utility model are as follows: 1. This utility model can sequentially drill seedling holes, inject water into the seedling holes, and place the seedlings into the seedling holes, resulting in high work efficiency and ease of implementation. It can compensate for the movement of the vehicle body, ensuring that the drilled seedling holes are wider at the top and narrower at the bottom, preventing hole collapse. Simultaneously, the size of the seedling hole opening matches the design, ensuring heat and moisture retention for subsequent seedlings and improving seedling survival rate. 2. In this seedling transplanting mechanism, when the planting device moves above the pre-drilled seedling holes, it can compensate for the forward movement of the vehicle body, making the seedling speed relative to the ground zero, allowing the seedlings to fall vertically into the seedling holes, improving the seedling transplanting effect. 3. The frame design has high stability, smooth operation, and is less prone to jamming. 4. The cleverly designed second and first non-circular gears work together to drive the well-drilling drill bit and the planting device to slide horizontally, providing bidirectional compensation and effectively solving the problem of ridge scraping. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

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

[0029] Figure 3 This is a schematic diagram of the skeletal structure after rotation;

[0030] Figure 4 Schematic diagrams of non-circular gear 1 and non-circular gear 2;

[0031] Figure 5 for Figure 4 Axonometric view of the gearbox housing after it has been opened;

[0032] Figure 6 This is a schematic diagram showing the connection between the second non-circular gear and the crank.

[0033] Figure 7 This is a schematic diagram of the feeding tray structure;

[0034] Figure 8 The diagram shows the movement trajectory of the well drilling bit and the planting device during their working process. The upper part represents the movement trajectory of the well drilling bit, and the lower part represents the movement trajectory of the planting device.

[0035] Figure 9 This is a diagram showing the movement trajectory of the drill bit during the well-hole formation process of a conventional transplanter.

[0036] Among them, 1-vehicle body; 2-track; 31-well drilling bit; 32-planter; 33-pull line; 4-frame; 41-longitudinal frame; 42-transverse frame; 5-water tank; 6-discharge plate; 7-water pipe; 8-pin; 9-shell; 10-crank; 101-split crank; 11-discharge chain; 12-first connecting rod; 13-second connecting rod; 14-first slider; 15-second slider; 16-first non-circular gear; 17-second non-circular gear. 18-Gear; 19-Flange; 20-First rocker arm; 21-Second rocker arm; 22-Fourth rocker arm; 23-Seedling cup delivery; 231-First rotating shaft; 232-Second rotating shaft; 24-Seedling drop inlet; 25-Seedling baffle; 26-Auxiliary plate; 27-Main drive shaft; 271-First power shaft; 272-First auxiliary shaft; 273-Second power shaft; 274-Second auxiliary shaft; 275-Third auxiliary shaft; 28-Slide rail. Detailed Implementation

[0037] Example 1: Two-way compensation tobacco seedling transplanting mechanism. This transplanting mechanism can dig seedling holes in the tobacco field, water the seedling holes, and then put the tobacco seedlings into the seedling holes. The steps are compact and the design is ingenious, which greatly reduces the intensity of manual labor.

[0038] Among them, this two-way compensation tobacco seedling transplanting mechanism, such as Figures 1-7 As shown, the vehicle includes a body 1. For movement of the body 1, a power unit and tracks 2 are provided on the body 1. The power unit includes a motor and a reducer connected to the motor. The reducer drives the tracks 2, which in turn move the entire body 1 within the tobacco field. In this embodiment, the tracks include drive wheels and guide wheels. The drive wheels and guide wheels drive the track portion for transmission, thereby moving the body. To ensure that the tobacco seedling transplanting mechanism moves synchronously with the body, a drive shaft 27 is connected to the drive wheels via a chain drive. The drive shaft 27 provides power to the subsequent tobacco seedling transplanting mechanism. Simultaneously, a first power shaft 271 and a second power shaft 273 are connected to the drive shaft 27 via a chain drive. This embodiment does not involve improvements to the tracks themselves; the technical terms "drive wheel," "guide wheel," and "track" mentioned are all mature existing technologies, and can be directly referenced.

[0039] To refine the structure of the vehicle body 1, the vehicle body 1 includes a frame 4, which is a parallel four-bar linkage. The frame 4 rotates in the vertical direction under the drive of the main power shaft 27. The specific scheme for achieving the vertical rotation of the frame 4 is as follows:

[0040] A rocker arm is rotatably connected to the frame 4, wherein the rocker arm is a first rocker arm 19 and a second rocker arm 20, and the first rocker arm 19 and the second rocker arm 20 are parallel to each other.

[0041] To ensure the rotation of the first rocker arm 19 and the second rocker arm 20, a first power shaft 271 and a first auxiliary shaft 272 are rotatably connected to the vehicle body 1. The first power shaft 271 is rotatably connected to the first rocker arm 19, and the first auxiliary shaft 272 is rotatably connected to the second rocker arm 20. The first end of the first power shaft 271 is rotatably connected to the vehicle body, and the second end of the first power shaft 271 is connected to the second end of the first rocker arm 19; the first rocker arm 19 performs circular motion driven by the rotation of the first power shaft 271. Similarly, the first end of the first auxiliary shaft 272 is rotatably connected to the vehicle body 1, and the second end of the first auxiliary shaft 272 is rotatably connected to the second end of the second rocker arm 20; the second rocker arm performs circular motion around the first auxiliary shaft 272. The first rocker arm 19 and the second rocker arm 20 together drive the entire frame to perform circular motion. The rotation of the first rocker arm 19 drives the rotation of the frame 4. To ensure the stability of the frame 4's rotation, a third rocker arm 21 and a fourth rocker arm 22 are also provided on the frame 4, which together drive the entire frame 4 to perform circular translation. To further explain the third rocker arm 21 and the fourth rocker arm 22, a second auxiliary shaft 274 and a third auxiliary shaft 275 are provided on the vehicle body 1. The second auxiliary shaft 274 and the third auxiliary shaft 275 are parallel to the first power shaft 271 and the first auxiliary shaft 272. One end of the second auxiliary shaft 274 and the third auxiliary shaft 275 is rotatably connected to the vehicle body, and the other end is rotatably connected to the third rocker arm 21 and the fourth rocker arm 22, respectively.

[0042] To provide power for the rotation of the frame, a sprocket is provided on the first power shaft 271. The sprocket is connected to the main power shaft 27 via a chain drive, so that the main power shaft 27 transmits power to the sprocket, thereby rotating the first power shaft 271. This causes the first rocker arm 19 to rotate around the first power shaft 271, which in turn causes the second rocker arm to rotate around the first auxiliary shaft 272, and the third and fourth rocker arms to rotate around the second auxiliary shaft 274 and the third auxiliary shaft 275, thereby causing the frame 4 to perform circular translation.

[0043] The frame 4 moves in translation during the rotation of the first rocker arm 19 and the second rocker arm 20. This means that the frame 4 remains horizontal during the lifting and lowering process, thus ensuring that the well drilling bit 31 and the planting device 32 remain vertical during the lifting and lowering process and do not tilt.

[0044] The frame 4 includes a longitudinal frame 41 and a transverse frame 42. The longitudinal frame 41 is arranged along the length direction of the vehicle body 1; the transverse frame 42 is arranged along the width direction of the vehicle body 1, and the longitudinal frame 41 is connected to the transverse frame 42. A slide rail 28 is provided on the longitudinal frame 41, and the length direction of the slide rail 28 is the same as the length direction of the longitudinal frame 41.

[0045] A first slider 14 and a second slider 15 are provided on the slide rail 28. The first slider 14 and the second slider 15 are respectively equipped with a well drilling bit 31 and a planting device 32. As the frame 4 makes a circular translation, the well drilling bit 31 and the planting device 32 will slide horizontally along the slide rail 28. Thus, as the frame 4 rises and falls, the well drilling bit 31 and the planting device 32 rise and fall together, and slide horizontally along the slide rail on the longitudinal frame 41. Specifically, a first non-circular gear 16 is connected to the second power shaft 273. The first non-circular gear 16 is rotatably connected to the second power shaft 273, while the non-circular gear 16 itself is fixed. The connection method of the first non-circular gear 16 is as follows: a U-shaped plate is provided on the vehicle body 1, and a flange 18 is fixed on the U-shaped plate. The first non-circular gear 16 is fixed on the flange 18. A bearing is connected to the connecting hole of the first non-circular gear 16, and the second power shaft 273 is rotatably connected to the first non-circular gear 16 through the bearing.

[0046] A second non-circular gear 17 meshes with the first non-circular gear 16. As the first non-circular gear 16 rotates, the second non-circular gear 17 rotates around the first non-circular gear 16.

[0047] A gearbox housing 9 is fitted around the outer sides of the first non-circular gear 16 and the second non-circular gear 17. The gearbox housing 9 is connected to the second power shaft 273 by a pin, so that the gearbox housing 9 rotates together with the second power shaft 273. A bearing is provided inside the gearbox housing 9, and the second non-circular gear 17 is rotatably connected to the gearbox housing 9 through the bearing. So when working, the gearbox housing 9 and the second non-circular gear 17 rotate coaxially and synchronously around the second power shaft 273. The second non-circular gear 17 meshes with the first non-circular gear 16 inside the gearbox housing 9. During the rotation, the first non-circular gear 16 and the second non-circular gear 17 are aligned with the short half-shaft through the long half-shaft, so that the center distance between them remains unchanged. The average transmission ratio is 1 for one revolution.

[0048] A crank 10 is connected to the second non-circular gear 17. The crank 10 is actually connected to the rotation axis of the second non-circular gear 17 in an eccentric connection. The crank 10 is Z-shaped, meaning it includes two parallel and fixedly connected sub-cranks 101, which are connected by a longitudinal rod. The distance from the rotation axis of the second non-circular gear 17 to the axis of the two sub-cranks 101 of the Z-shaped crank 10 is one crank. The first connecting rod 12 and the second connecting rod 13 are rotatably connected to the two sub-cranks 101, respectively.

[0049] Driven by the rotation of the second power shaft 273, the second non-circular gear 17 drives the crank 10 to rotate, and the crank 10 drives the first connecting rod 12 and the second connecting rod 13 to rotate. Due to the action of the two sub-cranks 101, the rotation of the first connecting rod 12 and the second connecting rod 13 is not coaxial.

[0050] The ends of the first link 12 and the second link 13 are both slidably mounted on the longitudinal frame 41. Specifically, the connection between the first link 12 and the second link 13 and the longitudinal frame 41 is as follows: the ends of the first link 12 and the second link 13 are respectively connected to the first slider 14 and the second slider 15, and the first slider 14 and the second slider 15 are both slidably mounted on the slide rail 28.

[0051] A pit-forming drill bit 31 and a planting device 32 are respectively connected to the first slider 14 and the second slider 15. In this embodiment, the height of the planting device 32 is higher than the height of the pit-forming drill bit 31 in the vertical direction. The pit-forming drill bit 31, relative to the movement trajectory, introduces soil to make a pit, and the planting device 32 puts the tobacco seedling into the pit above the pit opening.

[0052] Both the well-drilling drill bit 31 and the planting device 32 are vertically downward and on the same plane. That is, as the vehicle 1 moves, the well-drilling drill bit 31 drills holes for tobacco seedlings in front. When the hole moves below the planting device 32, the planting device inserts the tobacco seedlings into the hole. To achieve the movement of the well-drilling drill bit 31 and the planting device, a well-drilling drill bit motor is connected to the well-drilling drill bit 31. The well-drilling drill bit motor drives the well-drilling drill bit 31 to rotate, thereby drilling holes for tobacco seedlings. In this embodiment, the well-drilling drill bit motor is a commercially available product.

[0053] The planter 32 is connected to a pull line 33, which can be used to open the planter 32, allowing the tobacco seedlings inside to fall into the seedling holes.

[0054] In this embodiment, the planter 32 and the pull wire 33 on the planter 32 are both mature existing technologies. This embodiment does not involve any improvement to this part. It is only necessary to install the purchased planter 32 on this frame.

[0055] In addition, in this embodiment, the method for opening the planter 32 by pulling the wire 33 is as follows: one end of the wire 33 is fixed at a position slightly above the vehicle body, and the length of the wire 33 is constant. During operation, when the planter 32 moves to the lower half of its travel, the wire 33 is tightened, and the planter 32 opens; when the planter 32 moves to the upper half of its travel, the wire 33 is loosened, and the planter 32 closes.

[0056] During operation, the second power shaft 273 drives the gearbox housing 9 to rotate via the pin 8. As the gearbox housing 9 rotates, the second non-circular gear 17 rotates around the first non-circular gear 16. During the rotation of the second non-circular gear 17 around the first non-circular gear 16, the crank 10 will rotate. Then, with the center of the second non-circular gear 17 as the base point, the two cranks 101 drive the first connecting rod 12 and the second connecting rod 13 to rotate, which in turn drives the first slider 14 and the second slider 15 to slide horizontally on the slide rail 28.

[0057] The further working method is as follows: the first rocker arm 19, the second rocker arm 20, the third rocker arm 21, and the fourth rocker arm 22 drive the frame 4 to perform circular translation; the second power shaft 273 drives the gearbox housing 9 through the pin 8, and the gearbox housing 9 drives the second non-circular gear 17 to mesh and rotate around the first non-circular gear 16, so that the crank 10 rotates with the second non-circular gear 17. During the rotation of the crank 10, it will drive the first slider 14 and the second slider 15 to slide horizontally on the slide rail 28, realizing the forward and backward compensation of the vehicle body 1 during its forward movement; during this process, the well drilling bit 31 and the planting device 32 are always in a vertical state, and their relative motion trajectory is "inverted teardrop shape", and their absolute motion trajectory is "Y" shape, such as Figure 8 As shown, the portion of the well-drilling drill bit 31's trajectory located below the planting device 32's trajectory is the part that enters the soil, which can also be seen as the shape of a tobacco seedling hole. Figure 8 It can be seen that the seedling pits in this scheme are cylindrical with a conical bottom. The drill bit 31 causes little damage to the ridge surface during the pit formation process, making the seedling pits less prone to collapse and preventing soil from flowing back into the seedling pits, causing loose soil and affecting the growth of the seedlings.

[0058] In this embodiment, as the frame 4 moves in a circular motion, the relative movement trajectories of the well-hole drilling bit 31 and the planter 32, which are set on the first slider 14 and the second slider 15, are "inverted teardrop-shaped". Thus, as the vehicle body 1 moves forward, the well-hole drilling bit 31 and the planter 32, especially the well-hole drilling bit 31, have a horizontal compensation. This compensation is used to eliminate the problem of ridge scraping caused by the movement of the vehicle body. The compensation method is as follows: For the well-hole drilling bit 31, before reaching the lowest point of the tobacco seedling hole, it will rotate a certain distance in the opposite direction of the movement of the vehicle body 1, thereby offsetting the error caused by the forward movement of the vehicle body 1 and reducing the opening of the tobacco seedling hole; after reaching the lowest point of the tobacco seedling hole, it will rotate a certain distance in the direction of the movement of the vehicle body 1, which also reduces the opening of the tobacco seedling hole, avoiding the phenomenon of ridge scraping caused by the movement of the vehicle body 1, realizing two-way compensation and improving the survival rate of tobacco seedlings. Before the planter 32 moves above the pre-drilled tobacco seedling holes, it will have a speed in the opposite direction of the movement of the vehicle body 1, so as to avoid the vehicle body 1 having a horizontal speed during the descent of the tobacco seedlings.

[0059] In this embodiment, by compensating for the forward and backward movement of the drill bit 31 in the X direction relative to the forward direction of the vehicle body 1, the relative motion trajectory of the well-forming drill bit 31 is "inverted teardrop shape", and the absolute motion trajectory is "Y" shape, which prevents the occurrence of ridge scraping and improves the well-forming quality of the drill bit 31 when drilling tobacco seedling holes.

[0060] In this embodiment, the parallel four-bar linkage of the frame 4 performs circular motion, and the well-drilling drill bit 31 and the planter 32 slide horizontally on the slide 28. The combined effect changes the transplanting trajectory and compensates for the movement of the vehicle body, so that the original circular relative motion trajectory is changed into an "inverted teardrop" trajectory. This makes it less likely for voids to occur, and the size of the tobacco seedling hole is consistent with the design, so there will be no problem of the hole opening becoming larger due to the collapse of the hole opening.

[0061] Meanwhile, due to the compensation of the planter 32 relative to the vehicle body 1, when the planter 32 moves above the pre-drilled seedling holes, and seedlings need to fall into the holes, the speed of the seedlings is essentially zero, allowing them to fall vertically into the holes. The seedlings' speed relative to the ground is zero because the vehicle body 1 has a forward movement speed, while the planter 32 has a backward movement speed; the two movements essentially cancel each other out.

[0062] In addition, in this embodiment, since the power source of the entire tobacco seedling transplanting mechanism is the power of the vehicle body transmitted through chain drive, the rotation of the frame and the sliding of the first and second sliders depend on the traveling speed of the vehicle body and are positively correlated with the traveling speed. When the second non-circular gear 17 rotates once, it can drill a tobacco seedling hole, and at the same time, a tobacco seedling falls into the tobacco seedling hole.

[0063] Example 2 differs from Example 1 in that the power source of the drive shaft 27 is an electric motor. The motor drives the track to work through the reducer, and also directly drives the drive shaft 27 to rotate.

[0064] Example 3 differs from Example 1 in that, to ensure watering of the drilled tobacco seedling holes, a water tank 5 is installed on the vehicle body 1. A water pipe 7 is connected to the water tank 5, with its end facing downwards. The water pipe 7 connects to the well drilling bit 31 and the duckbill. A solenoid valve is installed on the water pipe 7, which opens periodically. The periodic opening of the solenoid valve is a mature existing technology, and this example does not involve any improvement to this part; therefore, it will not be elaborated upon further.

[0065] Example 4 differs from Example 3 in that: a feeding tray 6 and a seedling cup 23 are provided above the planter 32. The feeding tray 6 is provided with a circulating feeding chain 11. The transmission of the feeding chain 11 is achieved by connecting the main drive shaft 27 through the second chain 18. The operation of the main drive shaft 27 drives the second chain 18 to drive, and the transmission of the second chain 18 drives the feeding chain 11 to circulate within the feeding tray 6.

[0066] The reason why the feeding chain 11 can circulate within the feeding disc 6 is that: the feeding disc 6 is provided with two rotating shafts, namely the first rotating shaft 231 and the second rotating shaft 232. Gears are installed on both the first rotating shaft 231 and the second rotating shaft 232. After the two ends of the feeding chain 11 are connected, one end meshes with the gear on the first rotating shaft 231, and the other end meshes with the gear on the second rotating shaft 232. The first rotating shaft 231 is driven by the second chain 18 to the drive shaft 27, so the drive shaft 27 drives the second chain 18 to work, and the second chain 18 drives the first rotating shaft 231 to rotate. As the first rotating shaft 231 rotates, the gears rotate, and the feeding chain 11 circulates between the first rotating shaft 231 and the second rotating shaft 232.

[0067] The seedling cup 23 is connected to the feeding chain 11, and the feeding chain 11 drives the seedling cup 23 to move on the feeding plate 6. The bottom of the seedling cup 23 is provided with a feeding port, and a seedling baffle 25 is hinged to the feeding port. A compression spring is connected between the seedling baffle 25 and the feeding port. At the same time, the feeding plate 6 is provided with a seedling drop opening 24 to cooperate with the seedling baffle 25 of the seedling cup 23.

[0068] When the feeding chain 11 drives the seedling cup 23 to move on the feeding plate 6, when it moves to the seedling outlet 24, the seedling baffle 25 opens under the action of the compression spring. The tobacco seedlings in the seedling cup 23 come out from the feed outlet, pass through the seedling outlet 24 and enter the planter 32. When the planter 32 moves above the pre-drilled seedling hole, the planter 32 opens, allowing the tobacco seedlings to fall into the seedling hole. To cooperate with the opening of the seedling baffle 25, an auxiliary plate 26 is provided on the seedling outlet 24 along the chain drive direction. The auxiliary plate 26 is inclined. By setting the inclined auxiliary plate 26, when the transmission chain drives the seedling cup 23 to move, the seedling baffle 25 closes with a buffer.

[0069] The working process of this embodiment is as follows: The vehicle body 1 moves in the tobacco field, and the tobacco farmer stands next to the vehicle body 1 and puts tobacco seedlings into the seedling cup 23; when an empty seedling cup 23 appears, a tobacco seedling is put in; when the vehicle body 1 moves, the first power shaft 271 and the first auxiliary shaft 272 drive the frame 4 to move in a circular motion, and the crank 10 on the second non-circular gear 17 drives the first slider 14 and the second slider 15 to slide horizontally on the slide rail 28. The well drilling bit 31 and the planting device 32 connected to the first slider 14 and the second slider 15 move relative to each other. The movement trajectory is "inverted teardrop shape," and the absolute movement trajectory is "Y" shaped. When the vehicle body 1 moves forward, the well-drilling drill bit 31 slides against the direction of movement of the vehicle body 1 before reaching the lowest point of the seedling hole, compensating for the forward movement of the vehicle body 1. After reaching the lowest point of the seedling hole, the well-drilling drill bit 31 slides forward in the direction of movement of the vehicle body 1, similarly compensating for the forward movement of the vehicle body 1, avoiding significant damage to the ridge in the horizontal direction, making the seedling hole "inverted teardrop shape," preventing the hole opening from being too large, and avoiding ridge scraping. Simultaneously, after drilling, water flows from the water pipe 7 to the seedling hole, ensuring the survival rate of the transplanted tobacco seedlings.

[0070] To verify the effectiveness of this tobacco seedling transplanting mechanism, three experimental plots were designated as Experimental Plot 1, Experimental Plot 2, and Experimental Plot 3. The external conditions of Experimental Plots 1, 2, and 3 were identical, thus ensuring the only variable was the transplanting method.

[0071] 1. In experimental field 1, tobacco seedlings were transplanted manually;

[0072] In Experimental Field 1, since each experimental field has 10 mu of land, it took 5 days to complete the work manually, which was extremely inefficient and seriously affected the uniformity of tobacco seedling growth. In addition, during the acceptance process, it was found that the uniformity of tobacco seedlings was low when transplanted manually.

[0073] 2. In experimental field 2, a commonly used tobacco seedling transplanting mechanism was adopted;

[0074] In experimental field 2, since the field was also 10 mu (approximately 1.65 acres), the transplanting was completed in about half a day, greatly improving efficiency. However, observation revealed that the trajectory of the well drilling bit was elliptical, as... Figure 8 As shown, this causes the ridging phenomenon in the dug tobacco seedling holes. In test bench 2, this phenomenon occurred in more than 60% of cases, ultimately leading to poor quality of the dug tobacco seedling holes and low survival rate of the seedlings. It is important to note the following: Figure 9 In the middle, the part below the horizontal line is the part below the ground. As the vehicle moves forward, the well drilling bit 31 is prone to damaging the ridge surface. At the same time, it is easy to cause the tobacco seedling hole to expand further, which is not conducive to heat preservation and moisture retention.

[0075] 3. In experimental field 3, this tobacco seedling transplanting mechanism was used to transplant tobacco seedlings;

[0076] In experimental field 3, since the experimental field was also 10 mu (approximately 1.65 acres), the transplanting was completed in less than half a day, further improving efficiency. During the acceptance process, it was found that the tobacco seedlings fell vertically into the seedling holes, and the size of the seedling holes was appropriate, ensuring the insulation of the tobacco seedlings and the survival rate of the tobacco seedlings. Subsequent comparison of survival rates showed that the tobacco fields using this tobacco seedling transplanting mechanism had a much higher survival rate than those using conventional tobacco seedling transplanting mechanisms.

[0077] This utility model discloses a bidirectional compensation tobacco seedling transplanting mechanism, which can sequentially drill seedling holes, inject water into the seedling holes, and place tobacco seedlings into the seedling holes; this is convenient. At the same time, during operation, the crank drives the well-drilling drill bit and the planting device to slide horizontally on the longitudinal frame, performing front and rear compensation. This makes the relative movement trajectory of the well-drilling drill bit and the planting device "inverted water droplet shape", and the absolute movement trajectory "Y" shape, which reduces the occurrence of ridge scraping and improves the hole-drilling and transplanting effect.

Claims

1. A bidirectional compensation tobacco seedling transplanting mechanism, characterized in that: The vehicle includes a chassis, which is equipped with a power unit, a planter, a well drilling bit, and a horizontally arranged frame. The power assembly includes a drive shaft, a first non-circular gear, a second non-circular gear, and a gearbox housing. The drive shaft is rotatably mounted on the vehicle body. Both the first and second non-circular gears are non-circular gears. Both the first and second non-circular gears are housed within the gearbox housing. The first non-circular gear is fixed relative to the vehicle body; The main drive shaft drives the gearbox housing to rotate relative to the vehicle body; The second non-circular gear is rotatably disposed inside the gearbox housing, and the second non-circular gear meshes with the first non-circular gear; A horizontally positioned crank is connected to the second non-circular gear; A first connecting rod and a second connecting rod are connected to the crank. The planes of the first and second connecting rods are parallel. The ends of the first and second connecting rods are slidably mounted on the frame. The well drilling bit and the planting device are respectively connected to the ends of the first and second connecting rods.

2. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 1, characterized in that: The frame is a parallel four-bar linkage. A first power shaft and a first auxiliary shaft are horizontally arranged on the vehicle body. The main power shaft drives the first power shaft to rotate. The first power shaft and the first auxiliary shaft are parallel to each other and at the same height. The first power shaft and the first auxiliary shaft are rotatably mounted on the vehicle body and are respectively connected to the front and rear of the frame.

3. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 2, characterized in that: The second drive shaft is connected to the gearbox housing by a pin. The main drive shaft drives the second drive shaft to rotate, and the gearbox housing rotates together with the second drive shaft under the action of the pin.

4. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 3, characterized in that: The main drive shaft transmits power to the first drive shaft via chain drive.

5. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 4, characterized in that: The frame is equipped with a first rocker arm, a second rocker arm, a third rocker arm, and a fourth rocker arm. The frame also has a second auxiliary shaft and a third auxiliary shaft. The first ends of the first, second, third, and fourth rocker arms are rotatably connected to the frame. The first rocker arm is connected to the first power shaft and rotates under the drive of the first power shaft. The second ends of the second, third, and fourth rocker arms are rotatably connected to the first, second, and third auxiliary shafts, respectively.

6. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 5, characterized in that: The frame includes a longitudinal frame and a transverse frame, and the frame is equipped with a slide rail parallel to the longitudinal frame.

7. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 6, characterized in that: The first and second connecting rods are respectively equipped with a first slider and a second slider that are horizontally arranged, and both the first slider and the second slider are slidably arranged on the slide rail; the planting device and the well drilling bit are respectively connected to the first slider and the second slider.

8. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 7, characterized in that: The crank includes two fixedly connected sub-cranks with parallel axes. The first ends of the first connecting rod and the second connecting rod are rotatably connected to the two sub-cranks, respectively. The second ends of the first connecting rod and the second connecting rod are rotatably connected to the first slider and the second slider, respectively. The first slider and the second slider slide linearly on the longitudinal frame.

9. The bidirectional compensation tobacco seedling transplanting mechanism as described in claim 8, characterized in that: A bearing is installed inside the gearbox housing, and the second non-circular gear is rotatably connected to the gearbox housing through the bearing; during the meshing process of the second non-circular gear and the first non-circular gear, the center distance between the first non-circular gear and the second non-circular gear remains unchanged.

10. The bidirectional compensation tobacco seedling transplanting mechanism as described in any one of claims 1 to 9, characterized in that: It also includes a second power shaft, which is driven by the main power shaft to rotate. A bearing is installed in the bore of the first non-circular gear, and the second power shaft is rotatably connected to the first non-circular gear through the bearing. The gearbox housing is fixedly connected to the second power shaft. The second power shaft drives the gearbox housing to rotate coaxially and synchronously.

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