A soil loosening device for preventing clogging in garden lawns

Abstract

This invention discloses an anti-clogging lawn loosening device, belonging to the field of garden machinery. The device includes a frame, a walking mechanism, a power source, a loosening mechanism, an anti-clogging mechanism, a humidity detection unit, and a control unit. The loosening mechanism includes a loosening roller and multiple loosening blades connected to the power source. The anti-clogging mechanism includes a cleaning element located adjacent to the loosening roller, which partially overlaps or contacts the movement trajectory of the loosening blades to remove debris adhering to the blades. The humidity detection unit monitors the soil moisture in the work area in real time. The control unit controls the operation of the anti-clogging mechanism based on the humidity signal. This invention, by incorporating an active anti-clogging mechanism and combining it with intelligent control based on the working humidity, effectively removes soil and grass roots adhering to the loosening blades, preventing clogging, significantly improving the efficiency and continuity of loosening operations, and exhibiting strong adaptability.

Description

Technical Field

[0001] This invention relates to the field of garden machinery technology, and in particular to a clogging-preventing garden lawn loosening device. Specifically, it relates to a device for aerating and loosening lawn soil, and especially to a garden lawn loosening device with an active clogging-preventing function. Background Technology

[0002] After long-term trampling and natural settling, the soil in lawns becomes compacted, reducing aeration and water permeability, which seriously affects the healthy growth of the grass. In order to improve soil structure and promote lawn root development, it is essential to regularly loosen the soil (also known as aeration) the lawn.

[0003] There are many types of lawn loosening devices available today, the most common being rotary blade turf looseners and perforating turf looseners. Rotary blade turf looseners use a power-driven roller to rotate the blades at high speed, cutting the roots and loosening the soil. They are highly efficient and widely used. However, in actual operation, especially in environments with high soil moisture and stickiness, or when the grass roots are too dense, the blades easily become covered with wet soil, grass roots, and dead grass stems and leaves. These deposits gradually accumulate, filling the gaps between the blades and causing them to lose their cutting and loosening abilities—a phenomenon known as "clogging." Once clogged, not only does the loosening effect decrease drastically, but it also increases the load on the equipment, potentially damaging transmission components or the engine, forcing an interruption of operation and requiring manual cleaning. This severely impacts operational efficiency and continuity.

[0004] To address the aforementioned problems, existing technologies have proposed several improvement solutions. For example, Chinese utility model patent CN208624118U discloses an anti-tangling lawn comber with a soil-loosening function. This comber has a blade shaft and blades at the rear, reducing the likelihood of weeds tangling around the blades by combing dry grass before loosening the soil. This method creates clean conditions for loosening the soil through a pre-combing process, serving as a preventative measure, but it does not solve the problem of soil adhesion to the blades during operation. Chinese utility model patent CN221127859U discloses a lawn loosening device that pre-sprays water onto the lawn using a nozzle to keep the soil moist and prevent excessive wear on the blades. While this solution involves soil moisture regulation, its purpose is to protect the blades and prevent wear from hard soil, rather than solving the clogging problem caused by wet soil adhesion. Another patent application, CN116076176A, discloses a soil loosening device with an expandable loosening head. Its complex structure aims to enlarge the pore size for loosening soil, but it does not offer an effective solution to its own clogging problem. While there is a product concept abroad involving "anti-clogging serrations," their claimed anti-clogging effects are only effective under specific conditions, and their applicability to clayey soils remains poor.

[0005] Furthermore, some existing technologies attempt to clean working parts using mechanical scrapers or brushes. For example, Chinese patent CN204652882U discloses a rotary tiller with a scraper blade, which has a fixed scraper blade behind the rotary blade shaft to scrape away soil from the blades. However, this fixed scraper has significant drawbacks: First, the gap between the fixed scraper blade and the blades is difficult to adjust; too large a gap results in poor cleaning, while too small a gap can cause the blades to jam or experience severe wear. Second, the fixed scraper cannot adaptively adjust to changes in soil conditions; it may generate unnecessary friction in dry soil, while insufficient pressure may result in incomplete cleaning in wet, sticky soil. Therefore, existing mechanical scraper solutions cannot achieve efficient and reliable anti-clogging effects.

[0006] Furthermore, some high-end soil loosening devices have begun to experiment with hydraulically or electrically driven vibration-based working components, attempting to remove soil through high-frequency vibration. However, this approach is structurally complex, costly, and the vibration energy is easily transmitted throughout the machine, leading to reduced operational comfort. Additionally, the vibration-cleaning effect is not ideal for highly adhesive soils. Therefore, developing an anti-clogging soil loosening device capable of continuous and reliable operation under various soil moisture conditions, and effectively preventing or removing soil and grass roots adhering to the loosening working components, is a technical problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a clogging-preventing lawn loosening device. This device is capable of actively cleaning the attachments on the loosening working parts, thereby effectively preventing clogging and ensuring operational efficiency and continuity.

[0008] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0009] This invention provides a clogging-preventing lawn loosening device, comprising: a frame; a walking mechanism disposed at the bottom of the frame; a power source fixedly disposed on the frame; a loosening mechanism including a loosening roller driven by the power source, and a plurality of loosening blades fixedly disposed on the outer circumference of the loosening roller, the loosening roller being rotatably mounted on the frame; further comprising: an anti-clogging mechanism including one or more cleaning elements, the cleaning elements being disposed adjacent to the loosening roller and partially overlapping or contacting the movement trajectory of the loosening blades, for removing debris adhering to the loosening blades during the rotation of the loosening roller; a humidity detection unit disposed on the frame for real-time detection of soil humidity in the working area; and a control unit electrically connected to the humidity detection unit and the anti-clogging mechanism respectively, and controlling the operating state of the anti-clogging mechanism according to the soil humidity signal fed back by the humidity detection unit.

[0010] In the technical solution of this invention, the frame, serving as the supporting foundation of the entire device, is preferably welded from high-strength steel to ensure sufficient structural strength and service life. The shape of the frame can be designed according to actual needs, for example, using a frame structure to facilitate the installation of various functional components. The walking mechanism typically includes at least two wheels, which can be pneumatic tires or solid rubber wheels to provide good ground adhesion and shock absorption. The power source can be a gasoline engine, diesel engine, or electric motor, selected according to the working area and operating environment. The soil-loosening cutter roller in the soil-loosening mechanism is mounted on the frame via bearings and driven to rotate by the power source through belt, chain, or gear transmission. The soil-loosening blades can be made of wear-resistant alloy steel and fixed to the cutter roller by bolts or welding. Their shape can be L-shaped, arc-shaped, or straight to facilitate cutting into the soil.

[0011] The key innovation of this invention lies in the coordinated operation of an anti-clogging mechanism, a humidity detection unit, and a control unit. The cleaning element of the anti-clogging mechanism can be configured in various forms, such as a flexible brush head, an airflow nozzle, or a rigid scraper. A flexible brush head or an airflow nozzle is preferred to avoid damage to the loosening blades. The humidity detection unit can be a soil moisture sensor, such as a sensor based on capacitance measurement, resistance measurement, or time domain reflectance (TDR) principles. Its installation location should ensure real-time detection of soil moisture in the area where loosening operations will be performed. The control unit typically includes a microcontroller, memory, and input / output interfaces. It receives signals from the humidity detection unit and outputs control commands to the anti-clogging mechanism according to preset control logic. Through this configuration, the device can automatically adjust the operating state of the cleaning element based on changes in soil moisture, achieving intelligent anti-clogging control.

[0012] According to one embodiment of the present invention, the cleaning element is a flexible brush head, which includes a brush base and multiple bundles of elastic bristles fixed on the brush base. The ends of the elastic bristles extend into the rotation trajectory of the loosening blade and form elastic contact with the loosening blade.

[0013] The elastic bristles are preferably made of highly wear-resistant and elastic materials, such as nylon, polypropylene, or steel wire. Their diameter and length can be optimized according to the size and rotation speed of the tillering blades. The brush holder can be made of metal or high-strength plastic and connected to the frame by bolts or clips. The elastic bristles are arranged in multiple bundles, covering the entire width of the tillering blades, ensuring each blade is effectively cleaned. When the tillering blades rotate at high speed, the elastic bristles continuously scrape the blade surface, peeling off adhering soil and grass roots. Simultaneously, their elastic deformation adapts to the shape changes of the blades, avoiding rigid impacts.

[0014] According to one embodiment of the present invention, the anti-clogging mechanism further includes an adjusting drive for driving the cleaning element closer to or further away from the loosening blade roller, the adjusting drive being electrically connected to the control unit; the control unit controls the adjusting drive to adjust the contact pressure and / or contact gap between the cleaning element and the loosening blade according to the soil moisture signal.

[0015] The adjusting drive component can be a linear actuator such as an electric push rod, a pneumatic cylinder, a hydraulic cylinder, or a linear motor. Through precise control of the adjusting drive component, stepless adjustment of the contact pressure between the cleaning element and the loosening blade can be achieved. For example, when the soil moisture is high, the control unit increases the contact pressure, causing the elastic bristles to adhere more tightly to the blade, thus enhancing the cleaning effect; when the soil moisture is low, the contact pressure is reduced or even disengaged from the blade, reducing unnecessary wear and energy consumption. Adjusting the contact gap can achieve a similar effect. This adaptive adjustment capability allows the device to adapt to different soil conditions, optimizing energy consumption and wear while ensuring cleaning effectiveness.

[0016] According to one embodiment of the present invention, the cleaning element is an airflow nozzle, which is connected to a high-pressure air source through an air pipe, and its air outlet is directed toward the loosening blade to spray high-pressure airflow to blow away debris attached to the loosening blade.

[0017] Multiple airflow nozzles can be arranged along the axial direction of the tiller roller to ensure that each blade is impacted by the airflow. The air jet design should generate a high-speed, concentrated airflow, such as using a contraction nozzle or a Laval nozzle. The high-pressure air source can be a separate air pump, compressed gas drawn from the engine crankcase, or a pre-charged high-pressure air tank. When using an air pump, its start / stop and speed can be adjusted by a control unit to control the airflow pressure and flow rate. Airflow cleaning offers advantages such as non-contact, wear-free operation, and fast cleaning speed, making it particularly suitable for cleaning sticky, wet soil and grass roots.

[0018] According to one embodiment of the present invention, the high-pressure air source is a high-pressure air pump or a high-pressure air storage tank, which is fixedly installed on the frame.

[0019] High-pressure air pumps can be piston, diaphragm, or screw type, driven by an independent electric motor or linked to the main power source. High-pressure air tanks must be equipped with an inflation port and a pressure sensor to ensure stable operating pressure. When using air tanks, they can be pre-filled before operation, reducing the power requirements of the power source. For safety, the high-pressure air source should be equipped with a safety valve and a pressure gauge.

[0020] According to one embodiment of the present invention, a walking drive mechanism electrically connected to the control unit is further included for driving the walking mechanism; the control unit is configured to: when the soil moisture detected by the humidity detection unit exceeds a first preset threshold, the control unit controls the anti-clogging mechanism to start, and simultaneously adjusts the traveling speed of the walking drive mechanism according to the humidity value.

[0021] The walking drive mechanism can be an electric motor, a hydraulic motor, or a mechanical transmission mechanism directly connected to the power source. By controlling the walking speed, the work efficiency can be finely adjusted. For example, when the soil moisture is high, the walking speed can be appropriately reduced, allowing the loosening blades more time to contact the cleaning elements, while avoiding excessive speed that could lead to delayed cleaning and exacerbate clogging. Conversely, when the soil is dry, the walking speed can be increased to improve work efficiency. This coordinated control further optimizes the overall performance of the device.

[0022] According to one embodiment of the present invention, the soil loosening blades are arranged in a spiral pattern on the soil loosening blade roller.

[0023] The spiral arrangement allows the blades to cut into the soil sequentially, reducing impact load and power consumption. It also facilitates the backward transport of loosened soil, minimizing soil accumulation on the blades. The spiral direction and pitch can be optimized based on the loosening depth and travel speed.

[0024] According to one embodiment of the present invention, the cutting edge of the soil loosening blade is provided with a plurality of grooves.

[0025] The grooves can be V-shaped, U-shaped, or rectangular. Their function is to reduce the contact area between the blade and the soil, thereby reducing soil adhesion. The edges of the grooves also help break up soil clods. The spacing and depth of the grooves need to be designed appropriately based on the soil type and blade thickness to avoid weakening the blade's strength.

[0026] The present invention also provides a method for preventing clogging and loosening soil using the apparatus of the above embodiments, comprising the following steps:

[0027] S1: Before or during the operation, activate the humidity detection unit to detect the soil moisture in the operation area in real time;

[0028] S2: The control unit receives the humidity signal sent by the humidity detection unit and compares it with a preset humidity threshold.

[0029] S3: If the detected humidity value is lower than or equal to the first preset threshold, the control unit controls the anti-clogging mechanism to remain in standby or low-intensity working state.

[0030] S4: If the detected humidity value is higher than the first preset threshold, the control unit controls the anti-clogging mechanism to start and cleans the loosening blade with a working intensity positively correlated with the humidity value.

[0031] In this method, the first preset threshold can be set according to the specific soil type and empirical values, for example, a relative soil moisture content of 30% as the critical point. When the humidity is below this value, soil is less likely to adhere, and the anti-clogging mechanism can remain in standby mode, i.e., the cleaning element and blade do not contact each other or the airflow is not activated; or it can operate at a low intensity, such as maintaining a small contact pressure or intermittent airflow, to remove any small amount of adhering material that may be present. When the humidity is above the threshold, the anti-clogging mechanism is activated, and the working intensity increases with the increase in humidity, for example, by linearly increasing the contact pressure or airflow pressure, to ensure the cleaning effect. This graded control strategy ensures the anti-clogging effect while avoiding unnecessary energy waste and component wear.

[0032] According to one embodiment of the present invention, in step S4, the working intensity is the contact pressure, contact frequency or pressure of the high-pressure airflow between the cleaning element and the loosening blade.

[0033] Contact pressure can be controlled by adjusting the thrust of the drive component; contact frequency can be understood as the number of times the cleaning element contacts the rotating blade per second, which depends on the rotational speed of the blade roller and the layout of the cleaning element; the pressure of the high-pressure airflow can be changed by adjusting the air pump speed or the valve opening. These parameters can all be adjusted in real time by the control unit based on the humidity signal.

[0034] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0035] Active anti-clogging, high-efficiency operation: This invention, by setting up cleaning elements (such as flexible brush heads or airflow nozzles) that overlap or contact the movement trajectory of the loosening blades, can actively and continuously peel off or blow away soil and grass roots attached to the blades while loosening the soil. This "real-time cleaning" mode fundamentally solves the problem of frequent shutdowns for cleaning due to clogging in traditional loosening devices, greatly improving operational efficiency and continuity. Compared with the fixed scrapers mentioned in the background art, the cleaning elements of this invention have flexible or non-contact characteristics, avoiding jamming and excessive wear, and the optimal contact state can be achieved by adjusting the drive components, significantly improving the cleaning effect and reliability.

[0036] Intelligent control and strong adaptability: This invention innovatively introduces a humidity detection unit and a control unit, realizing intelligent operation of the anti-clogging mechanism. The control unit automatically adjusts the working state of the cleaning elements (such as contact pressure, airflow intensity), and even the overall speed of the machine, based on the real-time detected soil moisture. When the soil moisture is high and the risk of adhesion is high, the cleaning intensity automatically increases; when the soil is dry and adhesion is not easy, the cleaning mechanism can reduce its intensity or go into standby mode to save energy and reduce unnecessary wear. This intelligent adaptive control allows the device to perfectly adapt to various lawn conditions from dry to wet, exhibiting extremely strong versatility and environmental adaptability. Compared with existing cleaning devices that can only be manually adjusted or operate in fixed modes, the adaptive capability of this invention significantly broadens its application range, achieving true condition-adaptive operation.

[0037] Diverse Structures, Reliable Results: This invention provides various implementation methods for cleaning elements, including a low-cost, gentle cleaning "flexible brush head" solution and a contactless, wear-free "high-pressure airflow" solution. The flexible brush head utilizes elastic bristles in contact with high-speed rotating blades, effectively scraping away adhering substances while protecting both the blades and bristles. The high-pressure airflow solution completely avoids physical contact, making it particularly efficient for cleaning wet, sticky mud, and eliminating wear issues. Users can choose according to different operational needs and budgets, offering flexible solutions. Furthermore, the two solutions can be combined to achieve a dual cleaning process of brushing followed by blowing, obtaining optimal results.

[0038] Collaborative optimization for enhanced performance: The adjustable contact pressure / gap of the cleaning elements allows the anti-clogging mechanism to precisely match soil moisture. Simultaneously, the control unit adjusts the travel speed in conjunction with the mechanism. On slippery, wet soil prone to clogging, the speed can be appropriately reduced to allow the anti-clogging mechanism more time to clean, ensuring effective cleaning. Conversely, on dry soil, the speed can be increased to guarantee operational efficiency. This collaborative control of multiple mechanisms optimizes the overall machine's performance. This coordinated control of speed and cleaning intensity is another major innovation of this invention, ensuring an optimal balance between work quality and efficiency under various operating conditions.

[0039] Extended lifespan and reduced costs: Thanks to automatic cleaning, dirt no longer accumulates on the loosening blades, preventing overload of the drive system due to blockages. This reduces equipment failure rates and the risk of component damage, significantly extending the overall machine's lifespan and lowering user maintenance and operating costs. Simultaneously, intelligent control reduces unnecessary wear, further extending the lifespan of the cleaning components themselves.

[0040] Compact structure and easy implementation: The anti-clogging mechanism of this invention has a simple structure and can be directly integrated into existing soil loosening devices without significant modifications to the main unit. This results in low manufacturing costs and ease of industrial promotion and implementation. In particular, the flexible brush head and airflow nozzle can be implemented using standard parts or simple machined components, which helps reduce production costs and improve assembly efficiency.

[0041] Improved work quality: By effectively cleaning the adhering substances on the blades, this invention ensures that the loosening blades always maintain a sharp cutting edge, thereby improving the consistency of loosening depth and the uniformity of soil breaking, which is beneficial to the aeration and water permeability of the lawn roots and promotes healthy lawn growth. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0043] Figure 2 This is a schematic diagram of the anti-clogging mechanism inside the present invention.

[0044] Figure 3 This is a schematic diagram of the structure of the soil loosening blade of the present invention.

[0045] Reference numerals: 1. Frame; 2. Walking mechanism; 201. Walking wheel; 3. Power source; 4. Soil loosening mechanism; 401. Soil loosening roller; 402. Soil loosening blade; 403. Groove; 5. Anti-clogging mechanism; 501. Cleaning element; 501a. Flexible brush head; 501b. Airflow nozzle; 502. Brush base; 503. Elastic brush bristles; 504. Adjustment drive component; 505. High-pressure air source; 6. Humidity detection unit; 7. Control unit; 8. Push handle. Detailed Implementation

[0046] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] This invention discloses a clogging-preventing lawn loosening device, comprising:

[0050] frame;

[0051] A traveling mechanism, located at the bottom of the frame, is used to move the entire device.

[0052] The power source is fixedly mounted on the frame;

[0053] The soil loosening mechanism includes a soil loosening cutter roller that is connected to the power source for transmission, and a plurality of soil loosening blades fixedly disposed on the outer circumferential surface of the soil loosening cutter roller. The soil loosening cutter roller is rotatably mounted on the frame.

[0054] Its features include:

[0055] The anti-clogging mechanism includes one or more cleaning elements, which are disposed adjacent to the loosening cutter roller and partially overlap or contact the movement trajectory of the loosening blade, for removing debris attached to the loosening blade during the rotation of the loosening cutter roller;

[0056] A humidity detection unit is installed at the front end of the frame to detect the soil moisture in the work area in real time.

[0057] The control unit is electrically connected to the humidity detection unit and the anti-clogging mechanism respectively, and controls the operation of the anti-clogging mechanism according to the soil moisture signal fed back by the humidity detection unit.

[0058] In this invention, the cleaning element is preferably a flexible brush head, which includes a brush base and multiple bundles of elastic bristles fixed on the brush base. The ends of the elastic bristles extend into the rotation trajectory of the loosening blade and form elastic contact with the loosening blade.

[0059] In flexible brush head solutions, the material, diameter, length, and arrangement density of the elastic bristles are key design parameters. For example, for common lawn loosening blades, nylon bristles with a diameter of 0.5-1.5mm can be used. The bristle length is determined based on the installation distance between the blade and the brush holder, typically 30-80mm. The bristles are embedded in the brush holder in multiple bundles, with a bundle spacing of approximately 10-20mm, ensuring coverage of the entire blade width. The contact angle between the elastic bristles and the blade is also important, generally set at a 15-30 degree angle to the normal direction of the blade surface for optimal scraping effect. The brush holder can be made of aluminum alloy or stainless steel with a rust-proof treatment. The brush holder is connected to the frame via an adjusting drive, which can be an electric actuator with a stroke that can be designed as needed, such as 0-50mm, to achieve continuous adjustment of the contact pressure.

[0060] As a further preferred embodiment, the anti-clogging mechanism also includes an adjusting drive component for driving the cleaning element closer to or further away from the loosening blade roller. The adjusting drive component is electrically connected to the control unit. The control unit controls the adjusting drive component to adjust the contact pressure and / or contact gap between the cleaning element and the loosening blade according to the soil moisture signal. In this embodiment, the adjusting drive component is a cylinder, fixed inside the frame. One end of the cylinder's piston rod is detachably connected to the end of the brush holder away from the elastic brush filaments. By controlling the extension and retraction of the cylinder's piston rod, the elastic brush filaments are controlled to move closer to or further away. The cylinder's air supply can be provided by a high-pressure air source, which can also simultaneously supply air to the airflow nozzle, achieving multi-purpose use of a single source. To precisely control the contact pressure, a proportional pressure valve or an electromagnetic reversing valve can be installed in the cylinder's air circuit, with the control unit outputting a PWM signal to adjust the cylinder pressure. Alternatively, a pressure sensor can be installed on the brush holder to monitor the contact pressure in real time and feed it back to the control unit, forming a closed-loop control to further improve control accuracy.

[0061] In this invention, the cleaning element can also be an airflow nozzle. The airflow nozzle is connected to a high-pressure air source via an air pipe, with its nozzle facing the loosening blades to spray high-pressure airflow that blows away debris adhering to the blades. The number and arrangement of the airflow nozzles should be determined based on the length of the loosening roller and the distribution of the blades. For example, for a roller with a width of 500mm, 3-5 nozzles can be set, evenly distributed above the roller, with each nozzle covering a certain area. The nozzle's airflow can be designed as a flat fan shape or a circle. A flat fan-shaped nozzle can generate a fan-shaped airflow with a wider coverage area; a circle nozzle generates a high-speed jet with stronger impact. To adapt to different blade positions, the nozzle can be equipped with an angle adjustment mechanism to make the airflow direction adjustable. The high-pressure air source can be an air pump with an output pressure of 0.5-0.8MPa, and the flow rate is determined according to the number and diameter of the nozzles to ensure sufficient cleaning energy.

[0062] Furthermore, the high-pressure air source is a high-pressure air pump or a high-pressure air tank, fixedly installed on the frame. The cylinder is connected to the high-pressure air source via an air pipe. On one hand, the high-pressure air source not only provides the airflow nozzle with air to impact debris on the loosening blades, but also provides power to the cylinder, thereby driving the elastic brush filaments to approach the loosening blades and clean the debris. Using the same high-pressure air source to drive both the cylinder and the nozzle simplifies the system structure and reduces cost and maintenance difficulty. To ensure stable system operation, a pressure regulating valve and branch lines can be installed at the air source outlet to adjust the pressure supplied to the cylinder and nozzle respectively. The air tank should have a sufficiently large volume to maintain stable pressure during continuous nozzle operation; for example, a 10L-20L air tank is suitable.

[0063] Furthermore, the device also includes a walking drive mechanism electrically connected to the control unit for driving the walking mechanism. The control unit is configured to: when the soil moisture detected by the humidity detection unit exceeds a first preset threshold, the control unit controls the anti-clogging mechanism to start, and simultaneously adjusts the traveling speed of the walking drive mechanism according to the humidity value. The walking drive mechanism can be an electric hub motor or a hydraulic motor, and the motor speed or hydraulic valve opening can be adjusted by speed commands output by the control unit. The adjustment of the traveling speed can use a PID control algorithm to calculate the target speed in real time based on the humidity deviation. For example, a base speed of V0 can be set, and when the humidity exceeds the first threshold H1, the speed decreases linearly: V = V0 * (1 - k*(H - H1)), where k is the speed reduction coefficient and H is the real-time humidity. When the humidity exceeds the second threshold H2, the speed drops to the minimum safe speed Vmin. This speed adaptation ensures that the anti-clogging mechanism has sufficient time to clean the blades under high humidity conditions, avoiding clogging.

[0064] The present invention also provides a method for preventing clogging and loosening soil using the above-mentioned device, comprising the following steps:

[0065] S1: Before the operation, the humidity detection unit is activated to pre-detect the soil moisture in the operation area;

[0066] S2: The control unit receives the humidity signal sent by the humidity detection unit and compares it with a preset humidity threshold.

[0067] S3: If the detected humidity value is lower than or equal to the first preset threshold, the control unit controls the anti-clogging mechanism to remain in standby or low-intensity working state.

[0068] S4: If the detected humidity value is higher than a first preset threshold, the control unit controls the anti-clogging mechanism to activate and performs cleaning operations on the loosening blades with a working intensity positively correlated with the humidity value. In step S4, the working intensity can be contact pressure, airflow pressure, or the oscillation frequency of the cleaning element, etc. The control unit can determine the working intensity using fuzzy control or a lookup table method. For example, a humidity-pressure curve can be preset to map the humidity value to the corresponding pressure value, and then the pressure can be achieved by adjusting the drive component. For airflow nozzles, the airflow pressure can be changed by adjusting the speed of the air pump or the opening of the solenoid valve in front of the nozzle. For flexible brush heads, the contact pressure can be changed by adjusting the displacement of the drive component. In addition, an intermittent working mode can be adopted, for example, when the humidity is moderate, the cleaning element can be controlled to make intermittent contact or spray air to save energy.

[0069] In this invention, the loosening blades are arranged in a spiral pattern on the loosening cutter roller. The pitch and helix angle of the spiral arrangement need to be designed according to the number of blades and the length of the cutter roller. For example, for a cutter roller with a diameter of 200mm and a length of 600mm, 20 blades can be arranged in a double-headed spiral with a helix angle of 15 degrees, so that the blades cut into the soil sequentially, reducing impact. This arrangement also allows the soil to be pushed to one side during the rotation of the cutter roller, reducing repeated cutting and improving the loosening efficiency.

[0070] To enhance soil loosening and aid in cleaning, the loosening blade can have multiple grooves on its cutting edge to reduce the contact area with the soil. The grooves can be V-shaped, 2-5 mm deep, and spaced 10-20 mm apart. The edges of the V-shaped grooves help cut grass roots while simultaneously reducing the contact area between the blade and the soil, thus decreasing soil adhesion. Experiments show that blades with grooves can reduce soil adhesion by 20-30% compared to blades without grooves. The grooves can also create serrated edges on the blade, enhancing its ability to cut grass roots.

[0071] In this invention, the walking mechanism includes at least two wheels, enabling the device to move smoothly across the lawn. Preferably, the power source is a gasoline engine or an electric motor. The wheels can use wide, low-pressure tires to reduce compaction of the lawn. The choice of power source depends on the scale of the operation and environmental requirements: for large-area professional lawns, a gasoline engine can be selected; for parks, residential areas, and other areas sensitive to noise and emissions, an electric motor equipped with a battery pack can be selected. The electric motor can also achieve stepless speed regulation and forward / reverse control for easy operation.

[0072] Example 1

[0073] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a clogging-preventing garden lawn loosening device, which mainly includes a frame 1, a walking mechanism 2, a power source 3, a loosening mechanism 4, an anti-clogging mechanism 5, a humidity detection unit 6, and a control unit 7.

[0074] The frame 1 serves as the supporting skeleton for the entire device and can be constructed using high-strength metal profiles welded or bolted together. The walking mechanism 2 is located at the bottom of the frame 1, supporting the entire device and enabling it to move across the lawn. In this embodiment, the walking mechanism 2 includes two wheels 201, both directional wheels located at opposite ends of one side of the frame 1. The soil loosening mechanism 4 is located on the other side of the frame, allowing for flexible steering and stable movement. A push handle 8 is located at the rear of the frame 1 for easy pushing and directional control by the operator.

[0075] The power source 3 is fixedly mounted on the upper part of the frame 1 to provide power to the soil loosening mechanism 4. Depending on the application scenario and power requirements, the power source 3 can be either a gasoline engine or an electric motor. In this embodiment, a four-stroke gasoline engine is selected, which features high power and long range, making it suitable for large-area lawn operations. The engine has a rated power of 5.5kW and a speed of 3600rpm, transmitting power to the soil loosening roller 401 via belt drive. The belt drive has overload protection; when the soil loosening blades encounter obstacles such as stones, belt slippage prevents damage to the engine. The engine is also equipped with a throttle controller, which can be adjusted by the control unit 7 to change the speed of the soil loosening roller, adapting to different soil conditions.

[0076] The soil loosening mechanism 4 is the core component for performing soil loosening operations. For example... Figure 1As shown, it includes a soil loosening roller 401 that is connected to the output of a power source 3, and multiple soil loosening blades 402 fixedly mounted on the outer circumference of the soil loosening roller 401. The soil loosening roller 401 is a horizontally positioned rotating shaft, rotatably mounted on the lower front part of the frame 1 via a bearing seat. The power source 3 drives the soil loosening roller 401 to rotate at high speed via belt drive or chain drive. The soil loosening blades 402 are made of wear-resistant steel and are fixed to the roller by bolts or welding. To make the soil loosening process smoother and reduce lateral soil displacement, the multiple soil loosening blades 402 are preferably arranged in a spiral pattern on the soil loosening roller 401. In addition, to enhance the soil loosening effect and help reduce adhesion, this embodiment has multiple grooves 403 on the cutting edge of the soil loosening blades 402 (see...). Figure 3 These grooves 403 reduce the contact area between the blades and the soil, thereby reducing soil adhesion to some extent. Furthermore, when the loosening roller 401 drives the loosening blades 402 to rotate clockwise, it not only loosens the soil but also provides a certain pulling force, propelling the entire device forward. The rotational speed of the loosening roller 401 is adjustable, typically between 1000-2000 rpm. The number of blades is set according to the length of the roller, for example, 20-30 blades per meter of roller. The depth of the blades entering the soil can be controlled by adjusting the depth-limiting wheel (not shown in the figure) at the front of the frame; the loosening depth is generally 20-50 mm.

[0077] The core improvement of this invention lies in the inclusion of the anti-clogging mechanism 5 and the humidity detection unit 6. Combined with... Figure 1 and Figure 2 In this embodiment, the anti-clogging mechanism 5 includes one or more cleaning elements 501, which are flexible brush heads 501a. Specifically, the flexible brush head 501a includes a brush holder 502 and multiple bundles of elastic bristles 503 fixed on the brush holder 502. The brush holder 502 is fixedly mounted on the frame 1 by an adjusting drive 504 (e.g., a miniature cylinder), and the flexible brush head 501a is positioned adjacent to the loosening roller 401. Figure 2As shown, the ends of the elastic bristles 503 extend into the movement trajectory of the rotating loosening blade 402 and form elastic contact with the surface of the loosening blade 402. When the loosening roller 401 drives the loosening blade 402 to rotate at high speed, the elastic bristles 503 continuously brush the surface of the loosening blade 402, thereby peeling off the soil, grass roots, and other debris that have just adhered. The elastic bristles 503 are preferably made of wear-resistant and highly elastic nylon material, which can effectively clean without damaging the blade. The adjusting drive component 504 is electrically connected to the control unit 7, and can drive the flexible brush head 501a to move as a whole under the control of the control unit 7, thereby precisely adjusting the contact pressure and / or contact gap between the elastic bristles 503 and the loosening blade 402 to adapt to different cleaning needs. In this embodiment, the micro cylinder has a cylinder diameter of 20mm, a stroke of 30mm, and a working pressure of 0.4-0.6MPa. A guide rod is provided on the brush holder 502 to ensure smooth movement. The 503 flexible bristles are made of 0.8mm diameter nylon 1010 material, with a bristle length of 50mm and a bristle bundle spacing of 15mm, arranged in two rows to cover the blade width. Contact pressure is adjusted by controlling the cylinder pressure; as the cylinder pressure increases, the contact force between the bristles and the blade increases, enhancing the cleaning effect. To prevent excessive bristle wear, a limit block can be installed on the brush holder to restrict the maximum feed rate.

[0078] The humidity detection unit 6 is fixedly installed at the front bottom of the frame 1, in front of the traveling wheels 201. It is used to detect the soil moisture in the area to be worked on in real-time, non-contact, or contact mode during the device's movement. The humidity detection unit 6 can be a TDR (Time Domain Reflectometry) soil moisture sensor, a frequency domain reflectometry sensor, or a resistive soil moisture sensor. In this embodiment, a non-contact near-infrared soil moisture sensor is preferred, as it has a fast detection speed and does not affect movement. The humidity detection unit 6 transmits the detected real-time humidity signal to the control unit 7. This near-infrared sensor calculates soil moisture content by measuring the reflectivity of the soil surface to a specific wavelength, with a measurement depth of 0-5 cm and a response time of less than 1 second. The sensor is installed at the front of the frame, approximately 20 cm above the ground, protected by a protective cover to prevent soil splashing. To eliminate the influence of weeds and dead grass layers, a ditch opener (not shown in the figure) can be installed in front of the sensor to slightly remove the surface covering, allowing the sensor to directly illuminate the soil.

[0079] The control unit 7 is the "brain" of the device, typically composed of a microcontroller (such as an STM32 series) and its peripheral circuitry, with an embedded control program. The control unit 7 is fixedly mounted on the frame 1 and electrically connected to the humidity detection unit 6, the anti-clogging mechanism 5 (especially the regulating drive 504), and the throttle controller (not shown in the figure) of the power source 3. The control unit 7 receives the soil moisture signal fed back by the humidity detection unit 6 and generates control commands based on preset algorithms and thresholds. The control unit 7 uses an STM32F103 microcontroller, with a built-in 12-bit ADC for acquiring humidity sensor signals, a PWM output for controlling the proportional valve of the regulating drive, and a servo motor for controlling the engine throttle. The control unit is also equipped with an LCD display and buttons for displaying real-time humidity, operating status, and setting threshold parameters. The control unit's program includes built-in humidity thresholds, such as a first threshold of 30% and a second threshold of 50%, and uses a piecewise linear interpolation method to calculate the cleaning intensity. For example, when the humidity is between 30% and 50%, the contact pressure has a linear relationship with the humidity: P = P_min + (P_max - P_min)*(H-30%) / (50%-30%), where P_min is the minimum pressure (e.g., 0.1 MPa) and P_max is the maximum pressure (0.5 MPa). When the humidity is greater than 50%, the pressure remains at its maximum value. In addition, the control unit also receives feedback from the engine speed sensor and the travel speed sensor to achieve closed-loop control.

[0080] To better control the travel speed, the device may also include a walking drive mechanism electrically connected to the control unit 7. The walking drive mechanism can be a hub motor or hydraulic motor connected to the rear wheels, used to drive the walking wheels 201 to rotate actively, enabling the device to move independently. In this way, the control unit 7 can not only control the cleaning intensity but also control the travel speed in conjunction with the motor. In this embodiment, the walking drive mechanism uses two hub motors to drive the two walking wheels 201 respectively, each motor having a power of 200W, and the speed is adjusted by the control unit 7 via a PWM signal. The control unit adjusts the travel speed according to the humidity level: when the humidity is below 30%, the travel speed is set to 1.5 m / s; when the humidity is between 30% and 50%, the travel speed linearly decreases to 0.8 m / s; when the humidity is above 50%, the speed remains at 0.5 m / s. This adaptive speed ensures sufficient time for the anti-clogging mechanism to operate under high humidity conditions.

[0081] The working process and control logic of this embodiment are as follows:

[0082] Before or at the start of the operation, the operator can activate the device via the control panel (not shown in the figure) on the pusher 8. The power source 3 starts, driving the loosening roller 401 to rotate. At the same time, the humidity detection unit 6 starts working, performing real-time monitoring of the lawn soil in front.

[0083] The control unit 7 has a first preset threshold (e.g., relative moisture content of 30%) and a second preset threshold (e.g., relative moisture content of 50%).

[0084] When the real-time soil moisture signal received by the control unit 7 is lower than or equal to a first preset threshold, it is determined that the soil is relatively dry and not easy to adhere. At this time, the control unit 7 can control the anti-clogging mechanism 5 to be in standby mode (i.e., the adjusting drive component 504 does not move, and the flexible brush head 501a and the loosening blade 402 maintain a small gap, almost not in contact), in order to reduce energy consumption and reduce unnecessary brush bristle wear. At the same time, if the device has a self-propelled function, the control unit 7 can control the walking drive mechanism to move at a higher speed (such as V1) to ensure work efficiency. In this embodiment, in standby mode, the cylinder retracts, the gap between the brush bristles and the blade is about 5mm, and the brush bristles do not contact the blade. The traveling speed V1 is set to 1.5m / s.

[0085] When the real-time soil moisture signal received by the control unit 7 is higher than the first preset threshold but lower than or equal to the second preset threshold, it is determined that the soil moisture is moderate and there is a certain risk of adhesion. At this time, the control unit 7 controls the adjustment drive 504 to move forward, pushing the flexible brush head 501a forward, so that the elastic bristles 503 contact the loosening blade 402 with a preset moderate pressure, and the cleaning operation is started. At the same time, the control unit 7 can appropriately reduce the travel speed to a moderate speed (e.g., V2, V2 < V1). The moderate pressure is set to 0.3MPa, and the cylinder extension stroke makes the bristles contact the blade with moderate contact pressure. The travel speed V2 is set to 1.0m / s.

[0086] When the real-time soil moisture signal received by the control unit 7 exceeds the second preset threshold, it is determined that the soil is very wet and prone to severe clogging. At this time, the control unit 7 controls the adjusting drive component 504 to advance further, causing the elastic bristles 503 to make close contact with the loosening blade 402 at the maximum preset pressure, performing high-intensity forced cleaning. Simultaneously, the control unit 7 reduces the travel speed to a minimum (e.g., V3, V3 < V2) to ensure that the anti-clogging mechanism 5 has sufficient time to clean, guaranteeing the cleaning effect. The maximum pressure is set to 0.5 MPa, the cylinder is fully extended, the bristles and blade are in close contact, and the cleaning intensity is maximized. The travel speed V3 is set to 0.5 m / s.

[0087] Through the aforementioned intelligent hierarchical control, this device achieves an optimal balance between anti-clogging effect and operational efficiency.

[0088] Furthermore, this embodiment also considers a compensation mechanism for blade wear. As usage time increases, the elastic bristles wear down, leading to a decrease in contact pressure. To address this, the control unit 7 records the initial position and pressure correspondence. When the actual pressure feedback falls below a set value, the control unit automatically increases the cylinder extension to compensate for bristle wear and maintain a constant contact pressure. This adaptive compensation further improves the reliability and lifespan of the device.

[0089] Example 2

[0090] This embodiment is basically the same as Embodiment 1, and its structural diagram is as follows: Figure 2 As shown, the main difference lies in the different implementation methods of the anti-blocking mechanism 5.

[0091] In this embodiment, the cleaning element 501 is an airflow nozzle 501b. The anti-clogging mechanism 5 includes a high-pressure air source 505, an air pipe, and multiple airflow nozzles 501b. The high-pressure air source 505 can be a high-pressure air pump fixedly mounted on the frame 1 or a gas storage tank pre-filled with high-pressure gas. In this embodiment, a miniature high-pressure air pump driven by an independent motor is selected to ensure a continuous supply of high-pressure gas. The outlet of the high-pressure air pump is connected to multiple airflow nozzles 501b through an air pipe. These airflow nozzles 501b are fixedly mounted on the frame 1 by a bracket and are located above or to the side of the loosening roller 401, with their air outlets precisely facing the surface of the loosening blade 402.

[0092] In this embodiment, the control unit 7 is electrically connected to the control terminal of the high-pressure air pump (i.e., high-pressure air source 505). When the soil moisture detected by the humidity detection unit 6 exceeds a first preset threshold, the control unit 7 activates the high-pressure air pump, and high-pressure gas is rapidly ejected from the airflow nozzle 501b, forming a high-speed airflow that blows towards the rotating loosening blade 402. Utilizing the impact and shearing force of the high-speed airflow, the wet soil and grass clippings adhering to the blade are instantly blown off. This non-contact cleaning method results in minimal wear and is particularly suitable for cleaning highly adhesive wet soil.

[0093] To further improve cleaning efficiency and save energy, the control unit 7 can also adjust the airflow pressure and flow rate based on the humidity signal by adjusting the speed of the high-pressure air pump or setting an on / off valve, achieving graded control similar to that in Example 1. For example, the higher the humidity, the greater the airflow pressure. In this example, an oil-free piston air pump with a rated pressure of 0.7 MPa and a flow rate of 100 L / min is used. The air pump is driven by a DC motor, and the motor speed can be adjusted via PWM. The control unit outputs a 0-5V analog voltage or a PWM signal to control the motor driver based on the humidity signal, thereby changing the air pump speed and achieving pressure regulation. When the humidity is below 30%, the air pump does not start; when the humidity is 30%-50%, the pressure increases linearly to 0.4 MPa; when the humidity is above 50%, the pressure remains at 0.7 MPa. The nozzle uses three flat fan-shaped nozzles with a spray angle of 45°, installed about 100 mm above the blade roller, with the spray direction forming a 30° angle with the blade surface. To further improve the cleaning effect, a swing mechanism can also be set on the nozzle to make the nozzle swing back and forth along the blade roller axis, expanding the cleaning range.

[0094] Furthermore, to avoid excessive impact on the lawn soil from the high-pressure airflow, the jet pressure should not be too high, and the nozzle should be designed to spray only at the blades, avoiding direct airflow onto the ground. This can be achieved by installing a baffle near the nozzle or using a focusing nozzle. In this embodiment, a guide shield is installed at the nozzle outlet to concentrate the airflow onto the area from the blade root to the cutting edge, preventing airflow scattering.

[0095] For the high-pressure gas tank solution, a 15L tank with a working pressure of 0.8MPa can be selected. The tank is equipped with a pressure switch and a safety valve. When the pressure falls below the set value, the air pump automatically replenishes the gas. The advantage of using a gas tank is that it can provide a large flow of air in a short time, making it suitable for intermittent, high-intensity cleaning. The control unit can control the timing and duration of the nozzle's air jet via a solenoid valve, for example, synchronizing air jetting when the blade passes through the nozzle area to save gas. This synchronized air jetting can be achieved by installing a proximity switch or encoder on the cutter roller. The control unit calculates the air jetting timing based on the cutter roller speed and nozzle position, achieving precise cleaning.

[0096] Example 3

[0097] In this embodiment, the flexible brush head 501a of Embodiment 1 and the airflow nozzle 501b of Embodiment 2 can be used together to perform a double cleaning of the loosening blade 402 by brushing followed by blowing, achieving the best anti-clogging effect. Furthermore, the high-pressure air source 505 not only provides high-pressure airflow to the airflow nozzle 501b but also provides power to the adjusting drive component 504 (e.g., a miniature cylinder), thereby controlling the distance between the ends of the multiple bundles of elastic bristles 503 and the loosening blade 402. Specifically, the flexible brush head 501a can be positioned above and behind the loosening blade roller 401, and the airflow nozzle 501b can be positioned above and in front of the roller. This allows the blade to first pass through the airflow nozzle area during rotation, where the high-pressure airflow blows off most of the adhering material, and then pass through the flexible brush head area where the bristles further scrape away any remaining stubborn soil. This double cleaning method can adapt to various adhesion conditions, and is particularly suitable for complex conditions involving heavy clay and intertwined long grass roots.

[0098] In this embodiment, the control unit 7 simultaneously controls the airflow pressure and brush head contact pressure based on the humidity signal, enabling the coordinated operation of two cleaning methods. For example, when the humidity is moderate, a lower airflow pressure and a moderate brush head pressure can be used; when the humidity is high, both the airflow pressure and the brush head pressure are increased simultaneously to achieve the best cleaning effect. Furthermore, the primary and secondary cleaning methods can be switched based on the adhesion on the blades; for example, the brush head can be used primarily when there are many grass roots, while the airflow can be used primarily when there is a lot of wet soil. These strategies can be implemented by preset rules in the control unit or by using machine learning algorithms.

[0099] To ensure that the two cleaning elements do not interfere with each other, their installation positions should be staggered to prevent airflow from affecting the bristle operation. A protective cover can be placed near the brush head to prevent airflow from blowing the bristles off-center. Additionally, the driving methods of the two cleaning elements can be adjusted independently; for example, the airflow nozzle can use an independent air pump, and the brush head can use an electric actuator, to avoid mutual interference when sharing an air source.

[0100] This embodiment also provides an optional control logic: the control unit 7 classifies soil moisture into three levels based on real-time data from the humidity detection unit 6: low humidity (<30%), medium humidity (30%-50%), and high humidity (>50%). At low humidity, only the airflow nozzles are activated intermittently at low pressure to remove any remaining dust. At medium humidity, the airflow nozzles are activated continuously at medium pressure, and the flexible brush head is activated at low contact pressure. At high humidity, both the airflow nozzles and the flexible brush head are activated simultaneously at high pressure, and the travel speed is reduced. This tiered control ensures effective cleaning while minimizing energy consumption and wear.

[0101] Example 4

[0102] This embodiment provides another implementation of the cleaning element, namely, a combination of a rigid scraper and an elastic scraper. The cleaning element includes a fixed scraper and a floating scraper. The fixed scraper is mounted on the frame via a bracket, with its edge close to the loosening roller but not in contact with the blade to avoid rigid collision. The floating scraper, made of an elastic material (such as polyurethane), is mounted on the fixed scraper and extends into the blade's movement path. As the blade passes, the floating scraper elastically deforms, scraping away the deposits on the blade. This structure combines the stability of a rigid scraper with the adaptability of an elastic scraper, offering lower cost and suitability for applications where cleaning performance requirements are not particularly high.

[0103] To improve cleaning efficiency, multiple small holes or grooves can be made on the floating scraper to facilitate soil discharge and prevent soil accumulation on the scraper surface. The contact pressure between the scraper and the blade can be adjusted by changing the preload of the floating scraper or by replacing the scraper with one of different hardness. Although this embodiment does not have an automatic adjustment function, the contact depth between the scraper and the blade can be changed by manually adjusting the position of the fixed scraper, thus adapting to different working conditions to some extent. This solution is simple in structure and low in cost, making it suitable for small household soil loosening machines.

[0104] In this embodiment, the fixed scraper is made of 3mm thick stainless steel plate and is mounted on the frame using elongated bolts, allowing for manual front-to-back adjustment. The floating scraper is made of 5mm thick polyurethane board and is fixed to the fixed scraper with screws. A V-groove is cut at the lower end of the scraper to facilitate soil removal. During use, the operator adjusts the position of the fixed scraper based on experience, ensuring the scraper and blade are in slight contact. Although it lacks automatic adjustment, it is sufficient for occasional use by home users.

[0105] Example 5

[0106] This embodiment provides a humidity detection unit with a self-cleaning function. Since humidity detection units (especially contact sensors) are prone to accumulating dirt during operation, leading to a decrease in detection accuracy, this embodiment includes a cleaning device, such as a small scraper or air nozzle, near the humidity detection unit to periodically clean the sensor surface. This cleaning device can be controlled by a control unit and can be automatically activated at regular intervals or based on sensor signal quality, ensuring the sensor is always clean and improving detection reliability.

[0107] Specifically, the humidity detection unit 6 employs a needle-type soil moisture sensor, whose probe is inserted into the soil to measure resistance. To prevent soil adhesion to the probe, a miniature cylinder-driven scraper is placed next to the sensor. The scraper contacts the probe surface and reciprocates under the cylinder's influence, scraping away soil from the probe. The control unit activates the scraper every 30 seconds or when an abnormal measurement value is detected (such as a drastic change). Alternatively, a hydrophobic coating can be applied to the probe to reduce soil adhesion.

[0108] For non-contact sensors, an air nozzle can be installed in front of the sensor window, using a small air pump to supply compressed air to periodically blow away dust. The start and stop of the air nozzle are controlled by a control unit, for example, blowing once every 1 minute for 2 seconds. This keeps the sensor window clean and ensures measurement accuracy.

[0109] The implementation principle of this invention is as follows: This invention discloses an anti-clogging lawn loosening device, belonging to the field of garden machinery. The device includes a frame, a walking mechanism, a power source, a loosening mechanism, an anti-clogging mechanism, a humidity detection unit, and a control unit. The loosening mechanism includes a loosening roller and multiple loosening blades connected to the power source. The anti-clogging mechanism includes a cleaning element located adjacent to the loosening roller, which partially overlaps or contacts the movement trajectory of the loosening blades to remove debris adhering to the blades. The humidity detection unit monitors the soil moisture in the working area in real time. The control unit controls the operation of the anti-clogging mechanism based on the humidity signal. This invention, by setting an active anti-clogging mechanism and combining it with intelligent control based on the working humidity, can effectively remove soil and grass roots adhering to the loosening blades, preventing clogging, significantly improving the efficiency and continuity of loosening operations, and exhibiting strong adaptability.

[0110] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0112] Furthermore, those skilled in the art should understand that, without departing from the basic principles of the present invention, the specific technical features in the above embodiments can be combined, replaced, or modified to form new technical solutions. These technical solutions should also be considered as equivalent solutions of the present invention and fall within the protection scope of the present invention.

Claims

1. A soil loosening device for preventing clogging in garden lawns, comprising: Rack (1); The walking mechanism (2) is located at the bottom of the frame (1); The power source (3) is fixedly mounted on the frame (1); The soil loosening mechanism (4) includes a soil loosening cutter roller (401) that is connected to the power source (3) for transmission, and a plurality of soil loosening blades (402) fixedly arranged on the outer circumferential surface of the soil loosening cutter roller (401). The soil loosening cutter roller (401) is rotatably mounted on the frame (1). Its characteristic is that it further includes: The anti-clogging mechanism (5) includes one or more cleaning elements (501), which are disposed adjacent to the loosening roller (401) and partially overlap or contact the movement trajectory of the loosening blade (402) for peeling off debris attached to the loosening blade (402) during the rotation of the loosening roller (401). A humidity detection unit (6) is installed on the frame (1) for real-time detection of soil moisture in the work area; The control unit (7) is electrically connected to the humidity detection unit (6) and the anti-clogging mechanism (5) respectively, and controls the operation status of the anti-clogging mechanism (5) according to the soil humidity signal fed back by the humidity detection unit (6).

2. The anti-clogging lawn loosening device according to claim 1, characterized in that, The cleaning element (501) is a flexible brush head (501a), which includes a brush base (502) and multiple bundles of elastic bristles (503) fixed on the brush base (502). The ends of the elastic bristles (503) extend into the rotation trajectory of the loosening blade (402) and form elastic contact with the loosening blade (402).

3. The anti-clogging lawn loosening device according to claim 2, characterized in that, The anti-clogging mechanism (5) further includes an adjusting drive (504) for driving the cleaning element (501) closer to or further away from the loosening blade roller (401), the adjusting drive (504) being electrically connected to the control unit (7); the control unit (7) controls the adjusting drive (504) to adjust the contact pressure and / or contact gap between the cleaning element (501) and the loosening blade (402) according to the soil moisture signal.

4. The anti-clogging lawn loosening device according to claim 1, characterized in that, The cleaning element (501) is an airflow nozzle (501b), which is connected to a high-pressure air source (505) through an air pipe (506). Its nozzle faces the loosening blade (402) and is used to spray high-pressure airflow to blow off the debris attached to the loosening blade (402).

5. A clogging-prevention lawn loosening device according to claim 4, characterized in that, The high-pressure air source (505) is a high-pressure air pump or a high-pressure air storage tank, which is fixedly installed on the frame (1).

6. A clogging-prevention lawn loosening device according to any one of claims 1 to 5, characterized in that, It also includes a walking drive mechanism electrically connected to the control unit (7) for driving the walking mechanism (2); the control unit (7) is configured to: when the soil moisture detected by the humidity detection unit (6) exceeds a first preset threshold, the control unit (7) controls the anti-clogging mechanism (5) to start, and at the same time adjusts the walking speed of the walking drive mechanism according to the humidity value.

7. A clogging-prevention lawn loosening device according to claim 1, characterized in that, The soil loosening blades (402) are arranged in a spiral pattern on the soil loosening blade roller (401).

8. A clogging-prevention lawn loosening device according to claim 1, characterized in that, The cutting edge of the soil loosening blade (402) has multiple grooves (403).

9. A method for preventing clogging and loosening soil using the device according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Before or during the operation, activate the humidity detection unit (6) to detect the soil moisture in the operation area in real time; S2: The control unit (7) receives the humidity signal sent by the humidity detection unit (6) and compares it with a preset humidity threshold. S3: If the detected humidity value is lower than or equal to the first preset threshold, the control unit (7) controls the anti-clogging mechanism (5) to remain in standby or low-intensity working state; S4: If the detected humidity value is higher than the first preset threshold, the control unit (7) controls the anti-clogging mechanism (5) to start and clean the loosening blade (402) with a working intensity that is positively correlated with the humidity value.

10. The method for preventing clogging and loosening soil according to claim 9, characterized in that, In step S4, the working intensity is the contact pressure, contact frequency, or pressure of the high-pressure airflow between the cleaning element (501) and the loosening blade (402).

Images