Garlic planting and soil preparation device and method

Abstract

This invention provides a garlic planting land preparation device and method, relating to the field of agricultural machinery technology. It includes: rotary tillers arranged in a ring array on a rotary tiller seat; a magnetic coupling adsorption mechanism, consisting of an active magnetic coupling turntable positioned on both sides of the assembly frame and driven magnetic coupling mechanisms equidistantly arranged between them; a separation mechanism; a ridging roller; and a frame. The rotary tillage is performed by dragging the machine head. This invention employs multiple driven magnetic coupling mechanisms for independent transmission. When a rotary tiller encounters a hard object and becomes stuck, the tiller can brake without affecting the operation of surrounding tillers. This transmission method protects the tillers from significant damage. Furthermore, the magnetic coupling turntable itself also acts as an adsorption mechanism for steel products in the field, effectively removing harmful metals from the soil and providing favorable soil conditions for subsequent garlic planting.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a garlic planting land preparation device and method. Background Technology

[0002] Preparing the land before planting garlic is a crucial step. It breaks up the plow pan, increases soil aeration and permeability, removes weeds and diseased plant debris, and improves the soil's heat and water retention capacity, all of which have a vital impact on increasing garlic yield and quality.

[0003] A self-balancing wide-width dual-shaft rotary tillage and stubble-removing machine, disclosed in the prior art with the publication number "CN107864705B", includes a frame. A gearbox assembly is mounted on top of the frame, and a controller is mounted on the gearbox assembly. The controller is connected to a tilt sensor on the frame for controlling an electric cylinder. Two output shafts are located below the gearbox assembly, with a staggered structure. The front output shaft is for stubble removal, and the rear output shaft is for rotary tillage. The stubble removal output shaft is connected to a stubble removal blade assembly, which is connected to the front side of the machine. The rotary tillage output shaft is connected to a rotary tillage blade assembly, which is connected to the rear side of the machine. The stubble removal blade assembly and the rotary tillage blade assembly adopt a segmented blade structure. This device is suitable for combined field tillage operations, completing stubble removal, rotary tillage, and leveling in a single pass. It features high efficiency, low energy consumption, high operational precision, and good operability.

[0004] However, the aforementioned device still has significant drawbacks in its use: existing rotary tillers and the rotary tillage claws of the aforementioned device are all mounted on a single drive shaft. The rotation of the drive shaft drives the synchronous rotary tillage operation of several rows of rotary tillage claws. However, during the rotary tillage process in the field, hard stones and steel products in the soil, due to their high hardness, can damage the rotary tillage claws. The single drive shaft solution used in the aforementioned device and existing technologies cannot effectively solve the above problem. In recent years, there have been several incidents of maliciously scattering steel nails and steel bars in the field, causing damage to agricultural machinery. There is no device in the existing technology specifically designed to collect steel products, thereby increasing the risk of subsequent agricultural operations. Summary of the Invention

[0005] The purpose of this invention is to provide a garlic planting land preparation device and method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A garlic planting land preparation device, comprising: The rotary tiller claws are arranged in a ring array on the rotary tiller seat, which is rotatably mounted on a lifting shaft frame. The end of the lifting shaft frame away from the rotary tiller seat is rotatably mounted on an assembly frame via a bearing. The lifting shaft frame rotates around the assembly frame at a preset angle to adjust the tilling depth of the rotary tiller claws. The lifting shaft frame is adjusted at a preset angle under the drive of the tilling depth adjustment mechanism. Multiple lifting shaft frames are provided and arranged linearly at equal intervals along the assembly frame. The assembly frame is also provided with a magnetic coupling adsorption mechanism. The driven magnetic coupling mechanism consists of magnetic coupling turntables on both sides and a connecting shaft that fixes the two together. The connecting shaft is rotatably mounted on the assembly frame via a shaft hole opened on the assembly frame. The magnetic coupling adsorption mechanism consists of active magnetic coupling turntables located on both sides of the assembly frame and driven magnetic coupling mechanisms arranged equidistantly between them. The active magnetic coupling turntables are connected to the driven magnetic coupling mechanisms and adjacent driven magnetic coupling mechanisms through non-contact magnetic coupling. During rotation, the active magnetic coupling turntables on both sides synchronously drive the driven magnetic coupling mechanisms to rotate. The number of driven magnetic coupling mechanisms is consistent with and corresponds one-to-one with the lifting shaft frame. The driven magnetic coupling mechanisms are connected to the rotary tiller seat through a transmission mechanism, thereby transmitting the power of the driven magnetic coupling mechanisms to the rotary tiller seat. The driven magnetic coupling mechanisms can also adsorb and collect iron, cobalt, and nickel components in the soil after rotary tillage through magnetic adsorption. A separation mechanism is provided to facilitate the separation of iron-cobalt-nickel materials adsorbed on the driven magnetic coupling mechanism and collect them on a tray. Ridging rollers, wherein the ridge rollers are located at the rear end of the device in the direction of travel, and there is a pair of ridge rollers that transmit power through a ridge roller shaft fixedly connected at its center; and, The frame is used to assemble the assembly frame, magnetic coupling adsorption mechanism, separation mechanism, pallet and ridging roller. The frame is connected to the machine head through the transmission mechanism and the drag bar, and the rotary tillage is carried out by dragging the machine head.

[0007] Preferably, the tillage depth adjustment mechanism that drives the lifting shaft frame to adjust the preset angle includes multiple lifting telescopic cylinders. The multiple lifting telescopic cylinders are fixedly installed on the telescopic cylinder fixing frame. The number of lifting telescopic cylinders is the same as that of the lifting shaft frame and they correspond one-to-one. An embedded slide rod is also fixedly connected to the telescopic arm of the lifting telescopic cylinder. The embedded slide rod is slidably installed in the slide rod groove opened in the lifting shaft frame. By extending and retracting the lifting telescopic cylinder, the lifting shaft frame is driven to rotate around one side of the assembly frame, thereby adjusting the tillage depth of the rotary tiller.

[0008] Preferably, a drive sprocket is also fixedly installed on the connecting shaft, and corresponding chain teeth are provided on the rotary tiller. The drive sprocket and the rotary tiller are connected by a transmission chain to realize the power transmission between them.

[0009] Preferably, a main drive roller is fixedly installed on one side of the active magnetic coupling turntables on both sides. The main drive roller is fixedly connected to the first drive chain. A second drive chain is fixedly connected to one side of the ridging roller. The first drive chain and the second drive chain are connected by a chain to transmit power between them.

[0010] Preferably, the separation mechanism for separating the iron-cobalt-nickel material adsorbed on the driven magnetic coupling mechanism includes separation scrapers. The separation scrapers are correspondingly attached to the sides of multiple magnetic coupling turntables. The multiple separation scrapers are fixedly connected to a telescopic frame. The telescopic frame is fixedly connected to the telescopic arm of a telescopic cylinder. The telescopic cylinder is fixedly installed on the frame. By extending and retracting the telescopic cylinder, the separation scrapers are pushed to separate from the magnetic coupling turntables, thereby causing the iron-cobalt-nickel material adsorbed on them to separate and fall into the tray under the action of gravity.

[0011] Preferably, the frame is also equipped with a liquid fertilizer cylinder, and the bottom of the liquid fertilizer cylinder is provided with several spray heads arranged in a linear pattern, so that the liquid fertilizer stored in the liquid fertilizer cylinder can be spread onto the soil after rotary tillage through the spray heads.

[0012] Preferably, a cleaning channel is provided on the frame above the pallet, and a flip-type discharge plate is provided on the pallet. The cleaning channel facilitates the cleaning of materials on the pallet, and the flip-type discharge plate is used to recycle the objects on the pallet.

[0013] A method for preparing land for garlic cultivation, using the aforementioned garlic cultivation land preparation device, includes the following steps: Step 1: Adjust the tillage depth according to the soil conditions. In the same field, the depth of the rotary tillage claws on the raised rows can be adjusted so that the tillage depth within the raised rows is greater than the tillage depth between the surrounding rows. This setting allows for targeted adjustment of tillage depth based on the soil conditions in different locations in the field, thus enabling refined farming. Step 2: Start the device to operate. Since each rotary tiller has an individual drive chain and the rotary tiller is connected to an independent driven magnetic coupling mechanism, when the rotary tiller claw comes into contact with a hard object on the ground, a slippage phenomenon will occur, thereby reducing the damage to the rotary tiller claw during the rotary tillage process. Step 3: After being rotary tilled, the soil comes to the bottom of the magnetic coupling adsorption mechanism. At this time, under the magnetic force of the driven magnetic coupling mechanism, the iron, cobalt and nickel materials in the soil will be adsorbed. The iron, cobalt and nickel materials adsorbed on the driven magnetic coupling mechanism will detach and fall onto the tray under the intermittent operation of the separation mechanism. Step 4: After being turned over by rotary tillage, the soil forms ridges after passing through the ridging roller, thus completing the land preparation operation.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention eliminates the use of a single drive shaft to drive the rotary tiller claws. Instead, it employs multiple driven magnetic coupling mechanisms for independent transmission. Since the magnetic coupling turntables do not contact each other, when a rotary tiller claw encounters a hard object and becomes stuck, the claw can brake without affecting the operation of surrounding claws. This transmission method protects the rotary tiller claws from significant damage. Furthermore, the magnetic coupling turntable itself also acts as an adsorption mechanism for steel products in the field. Combined with the separation mechanism inside the tillage machine, it can effectively remove harmful metals from the soil, providing favorable conditions for subsequent garlic planting and having a crucial impact on improving garlic yield and quality. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the forward integral structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the rear overall structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the telescopic cylinder mounting structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the present invention in a lateral cross-section state; Figure 5 This is a schematic diagram of the first transmission chain disc mounting structure of the present invention; Figure 6 This is a schematic diagram of the lifting shaft bracket installation structure of the present invention.

[0016] In the diagram: 1 Rotary tiller claw, 2 Rotary tiller seat, 3 Lifting shaft frame, 4 Assembly frame, 5 Active magnetic coupling turntable, 6 Support plate, 7 Ridging roller, 8 Ridging shaft, 9 Frame, 10 Lifting telescopic cylinder, 11 Telescopic cylinder fixing frame, 12 Embedded slide bar, 13 Slide bar groove, 14 Magnetic coupling turntable, 15 Connecting shaft, 16 Drive sprocket, 17 Transmission chain, 18 Main transmission roller, 19 First transmission chain disc, 21 Separating scraper, 22 Telescopic frame, 23 Telescopic cylinder, 24 Liquid fertilizer cylinder, 25 Spray head, 26 Cleaning trough, 27 Tilting discharge plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-6 The present invention provides a technical solution: Example 1: A garlic planting land preparation device, comprising: Rotary tiller 1 is mounted in a ring array on rotary tiller seat 2. Rotary tiller seat 2 is mounted on lifting shaft frame 3 in a fixed-axis rotational manner. The end of lifting shaft frame 3 away from rotary tiller seat 2 is mounted on assembly frame 4 in a fixed-axis rotational manner via bearing. Lifting shaft frame 3 rotates around assembly frame 4 at a preset angle to adjust the tillage depth of rotary tiller 1. Lifting shaft frame 3 is adjusted at a preset angle under the drive of tillage depth adjustment mechanism. Multiple lifting shaft frames 3 are provided and are arranged linearly at equal intervals along assembly frame 4. Assembly frame 4 is also provided with magnetic coupling adsorption mechanism. The magnetic coupling adsorption mechanism consists of active magnetic coupling turntables 5 set on both sides of the assembly frame 4 and driven magnetic coupling mechanisms arranged at equal intervals between them. The active magnetic coupling turntables 5 are connected to the driven magnetic coupling mechanisms and adjacent driven magnetic coupling mechanisms through non-contact magnetic coupling. During the rotation of the active magnetic coupling turntables 5 on both sides, the driven magnetic coupling mechanisms are driven to rotate synchronously. The number of driven magnetic coupling mechanisms is consistent with that of the lifting shaft frame 3 and corresponds one-to-one. The driven magnetic coupling mechanisms are connected to the rotary tillage seat 2 through a transmission mechanism, thereby transmitting the power of the driven magnetic coupling mechanisms to the rotary tillage seat 2. The driven magnetic coupling mechanisms can also adsorb and collect iron, cobalt and nickel materials in the soil after rotary tillage through magnetic adsorption. The separation mechanism is used to separate the iron-cobalt-nickel material adsorbed on the driven magnetic coupling mechanism and collect it on the tray 6. The ridging rollers 7 are located at the rear end of the machine body in the direction of travel. There is a pair of ridging rollers 7, which transmit power through a ridging shaft 8 fixedly connected at its center; and... The frame 9 is used to assemble the assembly frame 4, the magnetic coupling adsorption mechanism, the separation mechanism, the pallet 6, and the ridging roller 7. The frame 9 is connected to the machine head through the transmission mechanism and the drag bar, and the rotary tillage is carried out by dragging the machine head.

[0019] In this embodiment, the frame 9 serves as a support device for various components. Its front end is equipped with a rotary tiller 1 for tilling and loosening the soil. The rotary tiller 1 is independently mounted and connected via a lifting shaft frame 3. The lifting shaft frame 3 moves around the assembly frame 4, allowing the tilling depth of the rotary tiller 1 to be adjusted as needed. In actual farming, since crops are often planted in a row-ridge system, deep tilling is required at the ridges, while shallow tilling is needed for the surrounding soil. Therefore, in this embodiment, the adjustable-depth rotary tiller 1 can be adjusted according to different tilling depths to meet more refined farming requirements. Simultaneously, the mechanism driving the rotary tiller seat 2 to rotate is a magnetic coupling adsorption mechanism, which has a non-contact transmission characteristic and anti-torsional protection effect. Because hard stones exist in the soil... Traditional rotary tillers, due to the presence of residual steel parts, cannot avoid hard objects, potentially damaging the tiller claw 1. However, in this embodiment, a magnetic coupling adsorption mechanism is used. When it touches a hard object, anti-torsion protection occurs, causing the tiller claw 1 to stop rotating without hindering the normal operation of the other tiller claws 1. This design cleverly solves the problem of easy damage to the tiller claw 1 in the prior art. In addition, the magnetic coupling adsorption mechanism not only serves as a transmission mechanism, but it can also adsorb iron products in the soil after rotary tillage through its own magnetic force, further improving its functional integration and effectively reducing the risk of damage to subsequent agricultural machinery. Furthermore, by adding a gravel rake to the bottom of the frame 9, hard stones in the turned soil can be removed, further reducing the operational risks of agricultural machinery.

[0020] Example 2: The tillage depth adjustment mechanism that drives the lifting shaft frame 3 to adjust the preset angle includes multiple lifting telescopic cylinders 10. The multiple lifting telescopic cylinders 10 are fixedly installed on the telescopic cylinder fixing frame 11. The number of lifting telescopic cylinders 10 is the same as that of the lifting shaft frame 3 and they correspond one-to-one. An embedded slide rod 12 is also fixedly connected to the telescopic arm of the lifting telescopic cylinder 10. The embedded slide rod 12 is slidably installed in the slide rod groove 13 opened in the lifting shaft frame 3. By extending and retracting the lifting telescopic cylinder 10, the lifting shaft frame 3 is driven to rotate around one side of the assembly frame 4 to adjust the tillage depth of the rotary tiller 1.

[0021] In this embodiment, the specific structure of the tillage depth adjustment mechanism for adjusting the lifting and lowering of each lifting shaft 3 is further disclosed. The lifting shaft 3 is raised and lowered by the extension and retraction of the lifting telescopic cylinder 10, thereby adjusting the tillage depth of the rotary tiller 1. In this embodiment, the lifting telescopic cylinder 10 is a hydraulic telescopic cylinder, which is controlled by an independent oil circuit.

[0022] Example 3: The driven magnetic coupling mechanism consists of magnetic coupling turntables 14 on both sides and a connecting shaft 15 that connects the two. The connecting shaft 15 is mounted on the assembly frame 4 in a fixed-axis rotatable manner through the shaft hole opened on the assembly frame 4.

[0023] A drive sprocket 16 is also fixedly installed on the connecting shaft 15, and corresponding chain teeth are provided on the rotary tiller 2. The drive sprocket 16 and the rotary tiller 2 are connected by the transmission chain 17 to realize the power transmission between the two.

[0024] In this embodiment, the specific structure of the magnetic coupling adsorption mechanism is further disclosed. The active magnetic coupling turntables 5 on both sides provide transmission power. Several driven magnetic coupling mechanisms between them are composed of magnetic coupling turntables 14 on both sides and connecting shafts 15. The magnetic coupling turntables 14 between adjacent driven magnetic coupling mechanisms are magnetically coupled in a non-contact manner. The rotation of the magnetic coupling turntables 14 drives the connecting shafts 15 to rotate. The rotation of the connecting shafts 15 drives the active sprockets 16 to rotate. The active sprockets 16 drive the rotary tiller seat 2 to rotate through the transmission chain 17, thereby driving the rotary tiller claws 1 to rotate through the rotation of the driven magnetic coupling mechanisms.

[0025] Example 4: On one side of the active magnetic coupling turntables 5 on both sides, a main drive roller 18 is fixedly installed. The main drive roller 18 is fixedly connected to the first drive chain 19. On one side of the ridging roller 7, a second drive chain 19 is fixedly connected. The first drive chain 19 and the second drive chain 19 are connected by a chain to transmit power between them.

[0026] In this embodiment, the transmission method between the active magnetic coupling turntable 5 and the ridging roller 7 is further disclosed. The power of both of them comes from the tractor. Specifically, the power of the tractor is connected to the main drive roller 18 through the transmission mechanism to realize the power transmission. Since this transmission method is commonly used in the prior art, the relevant structure is not shown.

[0027] Example 5: The separation mechanism used to separate the iron-cobalt-nickel material adsorbed on the driven magnetic coupling mechanism includes a separation scraper 21. The separation scrapers 21 are attached to the sides of multiple magnetic coupling turntables 14 in a one-to-one correspondence. The multiple separation scrapers 21 are fixedly connected to the telescopic frame 22. The telescopic frame 22 is fixedly connected to the telescopic arm of the telescopic cylinder 23. The telescopic cylinder 23 is fixedly installed on the frame 9. By extending and retracting the telescopic cylinder 23, the separation scrapers 21 are pushed to separate from the magnetic coupling turntables 14, thereby causing the iron-cobalt-nickel material adsorbed on them to separate and fall into the tray 6 under the action of gravity.

[0028] A cleaning channel 26 is provided on the frame 9 above the pallet 6, and a flip-type discharge plate 27 is provided on the pallet 6. The cleaning channel 26 facilitates the cleaning of materials on the pallet 6, and the flip-type discharge plate 27 is used to recycle the objects on the pallet 6.

[0029] In this embodiment, the specific structure of the separation mechanism is further disclosed. The extension and retraction of the telescopic cylinder 23 drives multiple separation scrapers 21 to move synchronously, thereby separating the ferrous material blocked by the separation scrapers 21 from the driven magnetic coupling mechanism, and falling into the tray 6 under the action of gravity. The ferrous material falling into the tray 6 is cleaned by the cleaning channel 26, and the object on the tray 6 is recovered by the cleaning channel 26.

[0030] Example 6: The frame 9 is also equipped with a liquid fertilizer cylinder 24. Several spray heads 25 are arranged in a linear pattern at the bottom of the liquid fertilizer cylinder 24. The liquid fertilizer stored in the liquid fertilizer cylinder 24 is spread onto the soil after rotary tillage through the spray heads 25.

[0031] In this embodiment, a liquid fertilizer cylinder 24 is also disclosed, which improves soil fertility by spraying liquid fertilizer into the turned soil, thereby promoting the growth of planted vegetables.

[0032] A method for preparing land for garlic cultivation, using the aforementioned garlic cultivation land preparation device, includes the following steps: Step 1: Adjust the tillage depth according to the soil conditions. In the same field, the depth of the rotary tillage claw 1 on the ridge row can be adjusted so that the tillage depth in the ridge row is greater than the tillage depth between the surrounding ridges. This setting allows for targeted tillage depth adjustment based on the soil conditions in different locations in the field, thus enabling refined farming. Step 2: Start the device to operate. Since each rotary tiller 2 has an individual drive chain 17 and the rotary tiller 2 is connected to an independent driven magnetic coupling mechanism, when the rotary tiller 1 comes into contact with a hard object on the ground, a slippage phenomenon will occur, thereby reducing the damage to the rotary tiller 1 during the rotary tillage process. Step 3: The soil after rotary tillage comes to the bottom of the magnetic coupling adsorption mechanism. At this time, under the magnetic force of the driven magnetic coupling mechanism, the iron-cobalt-nickel material in the soil will be adsorbed. The iron-cobalt-nickel material adsorbed on the driven magnetic coupling mechanism will detach and fall onto the tray 6 under the intermittent operation of the separation mechanism. Step 4: After being turned over by rotary tillage, the soil forms ridges after passing through the ridging roller, thus completing the land preparation operation.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A garlic planting land preparation device, characterized in that, include: The rotary tiller claws are mounted in a ring array on the rotary tiller seat, which is mounted on a lifting shaft frame in a fixed-axis rotatable manner. The end of the lifting shaft frame away from the rotary tiller seat is mounted on an assembly frame in a fixed-axis rotatable manner via a bearing. The lifting shaft frame rotates around the assembly frame at a preset angle to adjust the tilling depth of the rotary tiller claws. The lifting shaft frame is adjusted at a preset angle under the drive of the tilling depth adjustment mechanism. Multiple lifting shaft frames are provided and are arranged linearly at equal intervals along the assembly frame. The assembly frame is also provided with a magnetic coupling adsorption mechanism. The magnetic coupling adsorption mechanism consists of active magnetic coupling turntables on both sides of the assembly frame and driven magnetic coupling mechanisms arranged equidistantly between them. The active magnetic coupling turntables are connected to the driven magnetic coupling mechanisms and adjacent driven magnetic coupling mechanisms through non-contact magnetic coupling. The active magnetic coupling turntables on both sides synchronously drive the driven magnetic coupling mechanisms to rotate during rotation. The number of driven magnetic coupling mechanisms is consistent with and corresponds one-to-one with the lifting shaft frame. The driven magnetic coupling mechanisms are connected to the rotary tiller seat through a transmission mechanism, thereby transmitting the power of the driven magnetic coupling mechanisms to the rotary tiller seat. The driven magnetic coupling mechanisms can also adsorb and collect iron, cobalt, and nickel materials in the soil after rotary tillage through magnetic adsorption. The driven magnetic coupling mechanism consists of magnetic coupling turntables on both sides and a connecting shaft that fixes the two together. The connecting shaft is mounted on the assembly frame in a fixed-axis rotatable manner through a shaft hole opened on the assembly frame. A separation mechanism is used to facilitate the separation of iron-cobalt-nickel materials adsorbed on the driven magnetic coupling mechanism and collect them on a tray; The ridging rollers are located at the rear end of the device in the direction of travel. There is a pair of ridging rollers, which transmit power through a ridging shaft fixedly connected at the center. as well as, The frame is used to assemble the assembly frame, magnetic coupling adsorption mechanism, separation mechanism, pallet and ridging roller. The frame is connected to the machine head through the transmission mechanism and the drag bar, and the rotary tillage is carried out by dragging the machine head. The separation mechanism includes separation scrapers, which are fitted one-to-one with the sides of multiple magnetic coupling turntables. The multiple separation scrapers are fixedly connected to a telescopic frame, which is fixedly connected to the telescopic arm of a telescopic cylinder. The telescopic cylinder is fixedly installed on the frame. By extending and retracting the telescopic cylinder, the separation scrapers are pushed to separate from the magnetic coupling turntables, thereby causing the iron-cobalt-nickel material adsorbed on them to separate and fall into the tray under the action of gravity.

2. The garlic planting land preparation device according to claim 1, characterized in that: The tillage depth adjustment mechanism includes multiple lifting and telescopic cylinders, which are fixedly installed on a telescopic cylinder mounting frame. The number of lifting and telescopic cylinders is the same as that of the lifting shaft frame and they correspond one-to-one. An embedded slide rod is also fixedly connected to the telescopic arm of the lifting and telescopic cylinder. The embedded slide rod is slidably installed in a slide rod groove opened in the lifting shaft frame. By extending and retracting the lifting and telescopic cylinder, the lifting shaft frame is driven to rotate around one side of the assembly frame, thereby adjusting the tillage depth of the rotary tiller.

3. The garlic planting land preparation device according to claim 2, characterized in that: A drive sprocket is also fixedly installed on the connecting shaft, and corresponding chain teeth are provided on the rotary tiller. The drive sprocket and the rotary tiller are connected by a transmission chain to realize the power transmission between them.

4. A garlic planting land preparation device according to claim 1 or 3, characterized in that: On one side of the active magnetic coupling turntables on both sides, a main drive roller is fixedly installed. The main drive roller is fixedly connected to the first drive chain. On one side of the ridging roller, a second drive chain is fixedly connected. The first and second drive chains are connected by a chain to transmit power between them.

5. A garlic planting land preparation device according to claim 4, characterized in that: The frame is also equipped with a liquid fertilizer cylinder, and the bottom of the liquid fertilizer cylinder is provided with several spray heads arranged in a linear pattern. The liquid fertilizer stored in the liquid fertilizer cylinder is spread onto the soil after rotary tillage through the spray heads.

6. A garlic planting land preparation device according to claim 5, characterized in that: A cleaning channel is provided on the frame above the pallet, and a flip-type discharge plate is provided on the pallet. The cleaning channel facilitates the cleaning of materials on the pallet, and the flip-type discharge plate is used to recycle the objects on the pallet.

7. A method for preparing land for garlic cultivation, using the garlic cultivation land preparation device according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Adjust the tillage depth according to the soil conditions. In the same field, the depth of the rotary tillage claws on the raised rows can be adjusted so that the tillage depth within the raised rows is greater than the tillage depth between the surrounding rows. This setting allows for targeted adjustment of tillage depth based on the soil conditions in different locations in the field, thus enabling refined farming. Step 2: Start the device to operate. Since each rotary tiller has an individual drive chain and the rotary tiller is connected to an independent driven magnetic coupling mechanism, when the rotary tiller claw comes into contact with a hard object on the ground, a slippage phenomenon will occur, thereby reducing the damage to the rotary tiller claw during the rotary tillage process. Step 3: After being rotary tilled, the soil comes to the bottom of the magnetic coupling adsorption mechanism. At this time, under the magnetic force of the driven magnetic coupling mechanism, the iron, cobalt and nickel materials in the soil will be adsorbed. The iron, cobalt and nickel materials adsorbed on the driven magnetic coupling mechanism will detach and fall onto the tray under the intermittent operation of the separation mechanism. Step 4: After being turned over by rotary tillage, the soil forms ridges after passing through the ridging roller, thus completing the land preparation operation.

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