Depth-adjustable soil loosening device special for traditional Chinese medicinal material planting

Abstract

The invention discloses a depth-adjustable soil loosening device special for traditional Chinese medicinal material planting, and relates to the related technical field of traditional Chinese medicinal material planting, the depth-adjustable soil loosening device comprises a rack, one end of the rack is provided with a soil loosening mechanism, the soil loosening mechanism comprises a cabinet, a cutter and a baffle, the baffle is fixedly connected to the lower end of the cabinet, and the cutter is of a rake-shaped structure with a plurality of sharp teeth; the cutter is installed in the inner cavity of the cabinet in a sliding mode, the working end of the cutter extends out of an opening preset in the bottom of the cabinet and is used for executing soil loosening operation, a hammering mechanism is installed in the rack, and the output end of the hammering mechanism is located above the cabinet and is used for applying vertically-downward impact force to the upper end face of the cabinet; the soil loosening device solves the problems that an existing soil loosening device for traditional Chinese medicinal material planting is rough and inconvenient in tillage depth adjustment, cannot adapt to different medicinal material requirements, lacks an effective local reinforcement mechanism when facing hardened soil, causes uneven soil crushing, easily damages a cutter or causes equipment overload, and is inconvenient to use. The damage to the overall structure of soil is large, and the refined planting requirement is difficult to meet.

Description

Technical Field

[0001] This invention relates to the technical field of Chinese medicinal herb cultivation, specifically to an adjustable-depth soil loosening device for Chinese medicinal herb cultivation. Background Technology

[0002] In the cultivation of Chinese medicinal herbs, loosening the soil is a crucial step in ensuring the development and quality of the root system. Currently, commonly used soil loosening equipment includes hand-held or towed rotary tillers, mini plows, and hoes. The basic workflow is as follows: a tractor or manual labor provides traction, driving a frame equipped with fixed rotary tillers or plowshares across the field. The continuous rotation of the blades or the constant turning action of the plowshare breaks up the soil. The core structure of these devices is typically a simple frame on which non-adjustable tillage components are directly fixed or bolted. The main function of this type of equipment is to turn and coarsely break up the soil, preparing the seedbed for sowing or transplanting.

[0003] However, existing soil loosening tools and equipment have significant shortcomings in meeting the requirements of refined cultivation of Chinese medicinal herbs. Firstly, adjusting the tillage depth is extremely inconvenient, mostly relying on changing different blade sizes or adjusting the overall frame height. This adjustment process is crude and cannot achieve stepless fine-tuning during operation, making it difficult to accurately adapt to the specific needs of different medicinal herbs (such as shallow-rooted fritillaria and deep-rooted astragalus) for rhizosphere soil depth. Secondly, while the traditional continuous rotary cutting method is relatively efficient, it is highly destructive to soil structure, easily forming new plow pans and excessively disturbing the beneficial microbial environment, which does not conform to the ecological cultivation concept of Chinese medicinal herbs. Most importantly, when dealing with compacted, hard soil, existing equipment lacks an effective localized force-boosting mechanism, often resulting in uneven tillage depth, rapid blade wear, and even power overload shutdowns, failing to effectively loosen deep soil while protecting surface vegetation. These shortcomings restrict further improvements in the yield and quality of Chinese medicinal herbs. To solve the above-mentioned problems, a specially designed adjustable-depth soil loosening device for Chinese medicinal herb cultivation is provided. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable depth soil loosening device specifically for planting Chinese medicinal herbs, in order to solve the problems mentioned in the background art, such as the inconvenient and rough adjustment of tillage depth of existing soil loosening devices for planting Chinese medicinal herbs, the inability to adapt to the needs of different medicinal herbs, the lack of an effective local force enhancement mechanism when facing compacted soil, resulting in uneven soil breaking, easy damage to the blades or equipment overload, and the great damage to the overall soil structure, making it difficult to meet the requirements of fine planting.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable depth soil loosening device for planting Chinese medicinal herbs, comprising a frame, a soil loosening mechanism at one end of the frame, the soil loosening mechanism comprising a cabinet, a blade and a baffle, the lower end of the cabinet being fixedly connected to the baffle, the blade being a rake-like structure with multiple sharp teeth and slidably installed in the internal cavity of the cabinet, the working end of the blade extending from a pre-set opening at the bottom of the cabinet for performing soil loosening operations; The frame is equipped with a hammering mechanism. The output end of the hammering mechanism is located above the cabinet and is used to apply a vertical downward impact force to the upper surface of the cabinet, thereby driving the entire cabinet and the internal blades to move downward instantly, so that the part of the blades extending out of the cabinet can forcefully penetrate and break the soil to a set depth.

[0006] In a further embodiment, the tool includes a tool holder, a screw, and a limiting rod. The tool holder is slidably installed inside the cabinet, and the lower end of the tool holder extends out from a pre-set opening at the bottom of the cabinet. The screw is rotatably installed on the upper end of the tool holder and is threadedly connected to the cabinet. The limiting rod is fixedly connected to the upper end of the tool holder and slides through the upper end of the cabinet.

[0007] In a further embodiment, a support frame is fixedly connected to the lower end of the cabinet, and a baffle is fixedly installed inside the support frame.

[0008] In a further embodiment, the hammering mechanism includes a vibrating hammer, a sliding frame, and a cam. The vibrating hammer is fixedly connected to the upper side of the sliding frame, and the lower end of the sliding frame is slidably installed in the frame. A first spring for applying an upward elastic force to the sliding frame is installed in the frame, and the cam is rotatably installed in the frame. The rotation of the cam is used to apply a downward pressure to the sliding frame.

[0009] In a further embodiment, the vibrating hammer includes a frame, a hammer head, and a second spring. The frame is fixedly connected to the upper side of the sliding frame, the hammer head is slidably mounted on the lower end of the frame, and the second spring is mounted inside the frame and is used to apply a downward elastic force to the hammer head.

[0010] In a further embodiment, the hammering mechanism is configured as two, symmetrically installed in the frame, with a connecting rod connecting the two cams.

[0011] In a further embodiment, two movable wheels are rotatably mounted on the lower end of the frame, and an axle is connected between the two movable wheels, with the axle passing through the frame.

[0012] In a further embodiment, a linkage mechanism is installed inside the frame, which is used to link the axle and the connecting rod; The linkage mechanism includes a driving wheel, a driven wheel, and a transmission belt. The driving wheel is fixedly sleeved on the axle, the driven wheel is fixedly sleeved on the connecting rod, and the transmission belt is sleeved on the driving wheel and the driven wheel.

[0013] In a further embodiment, the driving wheel and the driven wheel are configured as sprockets, and the drive belt is configured as a chain.

[0014] In a further embodiment, a buffer rod is installed at the end of the cabinet facing the frame. The buffer rod includes a sleeve, a rod, and a third spring. The sleeve is fixedly inserted into the end face of the cabinet, the buffer rod is slidably inserted into one end of the sleeve, and the third spring is installed inside the sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention is an adjustable depth soil loosening device for planting Chinese medicinal herbs. By setting a rake-shaped blade that can be slidably installed in the cavity inside the box and whose working end can extend from the bottom opening of the box, it solves the problem that traditional fixed blades cannot flexibly and accurately adjust the effective tillage depth according to the characteristics of the medicinal herb root system, resulting in poor operational adaptability and difficulty in meeting the requirements of precision planting. 2. By setting up a hammering mechanism installed inside the frame, with its output end located above the cabinet, and used to apply vertical downward impact force, the problem of existing continuous cutting equipment lacking an instantaneous strong breakthrough mechanism when facing hard and compacted soil is solved, which leads to uneven soil loosening depth, easy damage to the cutting tools, and excessive disturbance to the overall soil structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an adjustable-depth soil loosening device for planting Chinese medicinal herbs, as proposed in this invention. Figure 2 This is a schematic diagram of the frame and cabinet connection structure of an adjustable depth soil loosening device for planting Chinese medicinal herbs proposed in this invention; Figure 3 This is a schematic diagram of the overall structure of a cabinet for an adjustable depth soil loosening device specifically for planting Chinese medicinal herbs, as proposed in this invention. Figure 4 This is a cross-sectional view of a cabinet for an adjustable-depth soil loosening device specifically for planting Chinese medicinal herbs, as proposed in this invention. Figure 5 This invention relates to the physical structure of a blade structure for an adjustable-depth soil loosening device specifically for planting Chinese medicinal herbs. Figure 6 This is a schematic diagram of the frame structure of an adjustable depth soil loosening device for planting Chinese medicinal herbs, as proposed in this invention. Figure 7 This is a schematic diagram of the internal components of the frame of an adjustable-depth soil loosening device for planting Chinese medicinal herbs, as proposed in this invention. Figure 8 This is a cross-sectional view of the frame of an adjustable-depth soil loosening device for planting Chinese medicinal herbs, as proposed in this invention. Figure 9 This is a side view of the hammering mechanism of an adjustable-depth soil loosening device for planting Chinese medicinal herbs, as proposed in this invention. Figure 10 This is a schematic cross-sectional view of the sleeve structure of an adjustable depth soil loosening device for planting Chinese medicinal herbs, as proposed in this invention.

[0017] In the diagram: 1. Frame; 2. Soil loosening mechanism; 21. Cabinet; 211. Support frame; 22. Cutting tool; 221. Tool holder; 222. Screw; 223. Limiting rod; 23. Baffle; 3. Hammering mechanism; 31. Vibrating hammer; 311. Frame; 312. Hammer head; 313. Second spring; 32. Sliding frame; 321. First spring; 33. Cam; 331. Connecting rod; 4. Moving wheel; 41. Axle; 5. Linkage mechanism; 51. Driving wheel; 52. Driven wheel; 53. Transmission belt; 6. Buffer rod; 61. Sleeve; 62. Sleeve rod; 63. Third spring. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0019] Please see Figures 1-10 This embodiment provides an adjustable-depth soil loosening device specifically for planting Chinese medicinal herbs, including a frame 1. One end of the frame 1 is rotatably connected to a housing 21 via a pin, allowing the housing 21 to swing at a certain angle relative to the frame 1. This connection method provides a foundation for the soil loosening mechanism 2 to adapt to uneven ground, and also facilitates lifting the entire loosening section when not in operation. The other end of the frame 1 is designed to connect to traction equipment such as an agricultural tractor or wheelbarrow, so that external power can drive the frame 1 and all its components to move in the field, thereby completing continuous or intermittent soil loosening operations.

[0020] like Figure 1 and Figure 2As shown, a soil loosening mechanism 2 is installed at one end of the frame 1. The soil loosening mechanism 2 is the part that performs the core soil tillage function, and mainly includes a cabinet 21, a cutting tool 22, and a baffle 23. The cabinet 21 is a rigid support and housing shell, and its interior is designed with cavities to provide space and guidance for the installation and movement of the cutting tool 22. A support frame 211 is fixedly installed at the lower end of the cabinet 21 by screws and other connectors. The support frame 211 serves to strengthen the bottom structure of the cabinet 21 and distribute the stress. The baffle 23 is fixedly installed inside the support frame 211. The lower end of the cabinet 21 is also connected to the support frame 211. One of the main functions of the baffle 23 is to act as a mechanical limit for the extension length of the lower end of the cutter 22, preventing the cutter 22 from sliding out of the cabinet 21 excessively under gravity or vibration. At the same time, during the movement of the device, the curved baffle 23 can smoothly slide or cross over protruding stones or field ridges on the ground, playing a certain role in protection and obstacle crossing, and preventing the loosening mechanism 2 from being damaged or stuck due to collisions.

[0021] like Figure 4 and Figure 5 As shown, the blade 22 is the component that directly contacts the soil and performs crushing and turning operations. It is designed as a rake-like structure with multiple sharp teeth. This multi-tooth design increases the soil contact area and crushing effect in a single operation, more effectively breaking up compacted soil clods and forming loose soil particles. The blade 22 is slidably installed in the internal cavity of the cabinet 21, meaning it can slide up and down along a pre-set guide surface on the inner wall of the cabinet 21. The working end (i.e., the lower end) of the blade 22 extends from a pre-set opening at the bottom of the cabinet 21 (also passing through the baffle 23). The size and shape of this opening match the cross-section of the blade 22, ensuring smooth sliding while preventing excessive soil from entering the cabinet 21. When the blade 22 moves downwards, its extended portion forcibly penetrates the soil, cutting, lifting, and turning it through a plowing-like motion, thereby achieving the purpose of loosening the soil. The entire soil loosening mechanism 2, including the cabinet 21, the cutter 22 and the baffle 23, has a certain weight, which can help the cutter 22 to initially contact and press into the surface soil, reducing the energy required for initial penetration.

[0022] Specifically, such as Figure 5As shown, the cutter 22 includes a cutter holder 221, a screw 222, and a limiting rod 223. The cutter holder 221 is the main frame of the cutter 22, with a rake-like structure, and is slidably installed inside the cabinet 21. The screw 222 is rotatably installed on the upper end of the cutter holder 221, specifically through a bearing or bushing, and is threadedly connected to a threaded seat fixed to the top wall of the cabinet 21 or a specially designed threaded seat. The limiting rod 223 is fixedly connected to the upper end of the cutter holder 221, and is set parallel to the screw 222, sliding through a smooth hole or guide sleeve opened at the upper end of the cabinet 21. The function of the limiting rod 223 is to prevent the cutter holder 221 from rotating with the screw 222, ensuring that the cutter holder 221 can only perform pure up-and-down linear motion, achieving precise constraint on the direction of movement. When it is necessary to adjust the soil loosening depth, the operator uses a wrench or other tools to turn the screw head at the upper end of the screw 222. Because the screw 222 is threaded into the cabinet 21, and the tool holder 221 is restricted from rotating by the limiting rod 223, the rotational motion of the screw 222 is converted into the linear lifting and lowering motion of the tool holder 221 relative to the cabinet 21. Rotating the screw 222 clockwise or counterclockwise precisely controls the length of the lower end of the tool holder 221 extending from the opening at the bottom of the cabinet 21, i.e., the effective working length of the tool 22, thus achieving stepless and precise adjustment of the loosening depth. This adjustment process usually needs to be performed under static conditions, such as by lowering the frame 1 to suspend the cabinet 21 and tool 22, or by directly suspending and raising the cabinet 21 to remove the tool 22 from soil contact, facilitating adjustment.

[0023] To drive the soil loosening mechanism 2 to perform efficient soil cutting, a hammering mechanism 3 is installed inside the frame 1. For example... Figure 6 As shown, the output end of the hammering mechanism 3 is located on the upper side of the cabinet 21. Its core function is to apply a continuous, intense, and vertically downward impact force to the upper surface of the cabinet 21. This impact force is transmitted through the cabinet 21 to the internal cutter 22, driving the entire cabinet 21 and its internal cutter 22 to overcome soil resistance and accelerate downwards instantaneously. This causes the portion of the cutter 22 extending out of the cabinet 21 to forcefully penetrate and break the hard or compacted soil layer with great kinetic energy. This instantaneous impact method is more effective than continuous static pressure in breaking through the shear strength of the soil, and is particularly suitable for the locally hard soil that may be encountered in the cultivation of Chinese medicinal herbs.

[0024] like Figure 7 and Figure 8As shown, the hammering mechanism 3 specifically comprises a vibrating hammer 31, a sliding frame 32, and a cam 33. The sliding frame 32 is the core motion carrier of the hammering mechanism 3. Its lower end is slidably mounted inside the frame 1, ensuring that the sliding frame 32 can only move vertically or along a predetermined trajectory. A first spring 321 is installed between the lower end of the sliding frame 32 and the frame 1, applying an upward elastic restoring force to the sliding frame 32. The vibrating hammer 31 is fixedly connected to one side of the upper end of the sliding frame 32, allowing it to move together with the sliding frame 32. The cam 33 is rotatably mounted inside the frame 1 via a pivot, and its outer contour is specially designed. The rotation of the cam 33 periodically interacts with the sliding frame 32. When the protruding part of the cam 33 rotates to a position contacting the sliding frame 32, it applies downward pressure to the lower end of the sliding frame 32 (specifically, a contact surface called the "control platform"). This pressure overcomes the elastic force of the first spring 321, forcing the sliding frame 32 to drive the vibrating hammer 31 downwards rapidly.

[0025] like Figure 9 As shown, the sliding frame 32 is designed in a Z-shape, which allows it to effectively convert the rotational drive generated by the cam 33 into a vertical linear impact. The sliding frame 32 consists of a bracket connected to the frame 311 at the upper end, a vertical sliding rod in the middle, and a control platform at the lower end. The structure is compact and the force path is clear. The outer wall of the cam 33 contacts the control platform at the lower end of the sliding frame 32. When the cam 33 rotates, its end away from the center of rotation (i.e., the protruding part) contacts and presses down on the control platform, which can efficiently convert the rotational torque into a downward linear driving force, causing the entire sliding frame 32 to move downward. At this time, the hammer 312 installed at the upper end of the sliding frame 32 gains downward speed.

[0026] The vibrating hammer 31 incorporates a buffering and energy transfer mechanism, specifically including a frame 311, a hammer head 312, and a second spring 313. The frame 311, acting as a rigid outer shell, is fixedly connected to the upper side of the sliding frame 32. The hammer head 312 is slidably mounted at the lower opening of the frame 311, its lower end ultimately impacting the upper surface of the cabinet 21. The second spring 313 is installed inside the frame 311, typically located above the hammer head 312, and is designed to apply a downward preload force to the hammer head 312. This "hammer head 312 and spring" design constitutes a simple impact mass system. When the sliding frame 32 is accelerated downward by the cam 33, the frame 311 drives the entire system downward, and the hammer head 312 also moves downward under inertia and the action of the second spring 313. At the moment the hammer head 312 impacts the cabinet 21, a tremendous amount of kinetic energy is released instantaneously. Meanwhile, the second spring 313 can absorb part of the reverse impact and help the hammer 312 to quickly rebound and reset after impact, preparing for the next impact, and also reducing the recoil damage to the transmission system caused by rigid impact.

[0027] To provide a more balanced and powerful impact force and simplify the drive, this embodiment sets up two sets of hammering mechanisms 3, which are symmetrically installed on both sides inside the frame 1. The two cams 33 of the two hammering mechanisms 3 are rigidly connected by a connecting rod 331, which ensures that the two cams 33 can rotate completely synchronously, allowing the vibrating hammers 31 on the left and right sides to simultaneously and in phase apply impact force to both sides of the upper surface of the cabinet 21. This symmetrical dual-point impact method avoids the problems of uneven force distribution, tilting, or jamming that may occur with single-point impact, ensuring that the impact force is transmitted vertically and efficiently, and making the downward movement of the entire loosening mechanism 2 more stable and reliable.

[0028] The device moves via two movable wheels 4 at the lower end of the frame 1. The movable wheels 4 are rotatably mounted on the frame 1 via axle bearings, and the two wheels 4 are rigidly connected by an axle 41 that passes directly through the axle seat at the lower part of the frame 1. The axle 41 not only ensures the synchronous rotation and fixed wheelbase of the two movable wheels 4, but its structure passing through the frame 1 also facilitates its use as a power input. When the agricultural tractor or wheelbarrow tows the device forward, the movable wheels 4 rotate under the action of ground friction, driving the axle 41 to rotate as well.

[0029] To achieve automated "work while moving" linkage, a sophisticated linkage mechanism 5 is installed inside frame 1. For example... Figure 7As shown, the function of the linkage mechanism 5 is to transmit and convert the rotational motion of the moving wheel 4 (axle 41) into the rotational motion of the hammering mechanism 3 (cam 33). Specifically, the linkage mechanism 5 includes a driving wheel 51, a driven wheel 52, and a transmission belt 53. The driving wheel 51 is a sprocket, fixedly sleeved and keyed to the axle 41. The driven wheel 52 is also a sprocket, fixedly sleeved on the connecting rod 331 connecting the two cams 33. The transmission belt 53 is a chain, tightly sleeved on the driving wheel 51 and the driven wheel 52. When the device is pulled forward, the moving wheel 4 drives the axle 41 to rotate, and the driving wheel 51 on the axle 41 rotates accordingly. Through the traction of the transmission belt 53, the driven wheel 52 and the connecting rod 331 connected to it are driven to rotate. The rotation of the connecting rod 331 ultimately drives the cams 33 on both sides to rotate synchronously. By selecting the diameter ratio (transmission ratio) of the driving wheel 51 and the driven wheel 52, the number of rotations of the cam 33 per certain distance the device advances can be precisely controlled, thus determining the frequency of hammering. For example, it can be designed so that for every rotation of the moving wheel 4, the cam 33 rotates one or several times, thereby completing one or more hammering cycles for loosening the soil, automatically matching the spacing of the loosening pits with the travel speed. Chain drive has the advantages of accurate transmission ratio, no slippage, and the ability to transmit large torques, making it particularly suitable for working conditions in farmland where there may be mud and water, and large load variations, ensuring the reliability and accuracy of the linkage.

[0030] Considering the severe impact and vibration generated during hammering operations, and the pivotal connection between the cabinet 21 and the frame 1, a buffer rod 6 is installed at the end of the cabinet 21 facing the frame 1 to prevent structural damage from hard impacts in unexpected directions (e.g., during impact or device vibration). The buffer rod 6 is essentially a damping damper, comprising a sleeve 61, a rod 62, and a third spring 63. The sleeve 61 is fixedly inserted into the end face of the cabinet 21 facing the frame 1. One end of the rod 62 is slidably inserted into the inner hole of the sleeve 61, while the other end is hinged or in contact with a corresponding support on the frame 1. The third spring 63 is installed inside the sleeve 61, typically located between the end of the rod 62 and the bottom of the sleeve 61, and is always under a certain compression. When the cabinet 21 experiences a violent swinging or impact tendency relative to the frame 1 due to hammering or bumping, the sleeve 62 and the sleeve 61 slide relative to each other, and the third spring 63 is further compressed or released. The elastic deformation of the spring absorbs and dissipates this impact energy, transforming the hard collision into a flexible buffer, thereby effectively protecting the connection structure between the cabinet 21 and the frame 1 and extending the service life of the device.

[0031] When the device is in use, based on the required soil loosening depth for the target medicinal materials, while the device is stationary, the screw 222 of the tool 22 is rotated to adjust the extension length of the tool holder 221, and the baffle 23 provides final limiting. Then, the frame 1 is connected to the traction device. The traction device drives the frame 1 forward, and the moving wheel 4 rotates accordingly. The rotation of the moving wheel 4 is ultimately converted into the synchronous rotational motion of the two cams 33 through the axle 41, the linkage mechanism 5 (drive wheel 51, transmission belt 53, driven wheel 52) and the connecting rod 331. During the rotation, the cam 33's protruding part periodically presses down on the control platform at the lower end of the sliding frame 32, overcoming the elastic force of the first spring 321, forcing the sliding frame 32 to move rapidly downward along the guide device. The sliding frame 32 drives the vibrating hammer 31 (frame 311) on it to move downward, and the hammer head 312 inside the vibrating hammer 31, under the preload and inertia of the second spring 313, strikes the upper surface of the cabinet 21 at a very high speed. The immense impact force is instantly transmitted through the cabinet 21 to the internal blade 22, driving it to forcefully pierce the soil and complete a loosening operation. Subsequently, after the cam 33 continues to rotate and disengages, the restoring force of the first spring 321 quickly pulls the sliding frame 32 and its vibrating hammer 31 back to their original positions, preparing for the next hammering. At the same time, the traction force propels the device forward, and the moving wheel 4 continues to rotate, thus performing the aforementioned hammering cycle automatically and continuously. The buffer rod 6 continuously absorbs the relative impact energy between the cabinet 21 and the frame 1 throughout the process, providing protection. The baffle 23 smoothly skims across the ground during movement, protecting the blade 22 and the bottom of the cabinet 21.

[0032] Compared to existing rotary tillers or plows that primarily rely on continuous rotary cutting, this invention employs a purely mechanical "movement, cam 33 linkage, and instantaneous hammering" innovative solution. This addresses the shortcomings of traditional tillage methods in addressing the needs of medicinal herb cultivation, such as localized deep loosening, precise depth adjustment, avoiding excessive disturbance to the topsoil, and protecting the root systems of surrounding crops. Specifically, this invention achieves millimeter-level precision and stepless adjustment of loosening depth through the cooperation of screw 222 and limit rod 223, perfectly adapting to the root growth needs of different medicinal herbs. The purely mechanical linkage between the moving wheel 4 and the hammering mechanism 3 achieves automatic synchronization of forward movement and loosening action, requiring no additional power source, making it energy-efficient and reliable. The instantaneous impact method for breaking up the soil is more effective than continuous cutting in breaking up deep compaction, and the overall damage to the soil structure is smaller and more controllable. The symmetrically arranged double hammering mechanism 3 and buffer rod 6 design ensures operational stability and equipment durability. The device is robust in structure and fully mechanically driven, making it particularly suitable for use in typical medicinal herb cultivation environments such as remote mountainous areas and terraced fields where electricity is scarce.

[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. An adjustable-depth soil loosening device for planting Chinese medicinal herbs, comprising a frame (1), characterized in that: One end of the frame (1) is provided with a soil loosening mechanism (2). The soil loosening mechanism (2) includes a cabinet (21), a cutter (22) and a baffle (23). The lower end of the cabinet (21) is fixedly connected to the baffle (23). The cutter (22) is a rake-like structure with multiple sharp teeth and is slidably installed in the internal cavity of the cabinet (21). The working end of the cutter (22) extends out from the pre-set opening at the bottom of the cabinet (21) to perform soil loosening operations. The frame (1) is equipped with a hammering mechanism (3). The output end of the hammering mechanism (3) is located above the cabinet (21) and is used to apply a vertical downward impact force to the upper surface of the cabinet (21), thereby driving the entire cabinet (21) and the cutter (22) inside to move downward instantly, so that the part of the cutter (22) extending out of the cabinet (21) can be forcibly inserted into and break the soil at a set depth.

2. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 1, characterized in that: The cutting tool (22) includes a tool holder (221), a screw (222) and a limiting rod (223). The tool holder (221) is slidably installed inside the cabinet (21), and the lower end of the tool holder (221) extends out from a pre-set opening at the bottom of the cabinet (21). The screw (222) is rotatably installed on the upper end of the tool holder (221), and the screw (222) is threadedly connected to the cabinet (21). The limiting rod (223) is fixedly connected to the upper end of the tool holder (221), and the limiting rod (223) slides through the upper end of the cabinet (21).

3. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 2, characterized in that: The lower end of the cabinet (21) is fixedly connected to a support frame (211), and the baffle (23) is fixedly installed inside the support frame (211).

4. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 3, characterized in that: The hammering mechanism (3) includes a vibrating hammer (31), a sliding frame (32) and a cam (33). The vibrating hammer (31) is fixedly connected to the upper side of the sliding frame (32). The lower end of the sliding frame (32) is slidably installed in the frame (1). A first spring (321) for applying an upward elastic force to the sliding frame (32) is installed in the frame (1). The cam (33) is rotatably installed in the frame (1). The cam (33) rotates to apply a downward pressure to the sliding frame (32).

5. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 4, characterized in that: The vibrating hammer (31) includes a frame (311), a hammer head (312), and a second spring (313). The frame (311) is fixedly connected to the upper side of the sliding frame (32). The hammer head (312) is slidably mounted on the lower end of the frame (311). The second spring (313) is installed inside the frame (311) and is used to apply a downward elastic force to the hammer head (312).

6. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 5, characterized in that: The hammering mechanism (3) is configured as two, symmetrically installed in the frame (1), and a connecting rod (331) is connected between the two cams (33).

7. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 6, characterized in that: The lower end of the frame (1) is rotatably mounted with two movable wheels (4), and an axle (41) is connected between the two movable wheels (4), and the axle (41) passes through the frame (1).

8. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 7, characterized in that: The frame (1) is equipped with a linkage mechanism (5), which is used to link the axle (41) and the connecting rod (331). The linkage mechanism (5) includes a drive wheel (51), a driven wheel (52) and a transmission belt (53). The drive wheel (51) is fixedly sleeved on the axle (41), the driven wheel (52) is fixedly sleeved on the connecting rod (331), and the transmission belt (53) is sleeved on the drive wheel (51) and the driven wheel (52).

9. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 8, characterized in that: The driving wheel (51) and driven wheel (52) are configured as sprockets, and the transmission belt (53) is configured as a chain.

10. The adjustable-depth soil loosening device for planting Chinese medicinal herbs according to claim 9, characterized in that: The cabinet (21) is equipped with a buffer rod (6) at one end facing the frame (1). The buffer rod (6) includes a sleeve (61), a rod (62) and a third spring (63). The sleeve (61) is fixedly inserted into the end face of the cabinet (21). The buffer rod (6) is slidably inserted into one end of the sleeve (61). The third spring (63) is installed inside the sleeve (61).

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