A three-tooth stubble poking active anti-blocking device for no-tillage seeding machine and operation method

Abstract

This invention provides a three-tooth active anti-clogging device and operating method for no-till planters, belonging to the field of agricultural machinery technology. It includes an automatic height control mechanism and a spring-tooth stubble-clearing component. The automatic height control mechanism connects to ground rollers, a pressure sensor, and a control motor via a frame. Two ground rollers are symmetrically positioned at the front of the frame, with a pressure sensor fixed in the middle to detect the amount of straw cover on the ground in real time. An electrical signal drives a slide rail to rise and fall, adjusting the height of the spring-tooth stubble-clearing component. The spring-tooth stubble-clearing component includes a three-claw spring tooth, a spring tooth connecting mechanism, and a spring tooth spring. The head of the three-claw spring tooth consists of a main stubble-clearing claw and left and right oblique stubble-clearing claws. This invention dynamically adjusts the stubble-clearing height through closed-loop control, combined with the directional flow guidance of the bent part of the three-claw spring tooth, improving straw dispersion efficiency and reducing soil disturbance. It solves the problems of easy clogging and unstable stubble clearing in no-till planters when straw cover changes, and is suitable for seedling strip clearing operations in conservation tillage.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and more particularly to a three-tooth active anti-clogging device and its operation method for no-till seeders. Background Technology

[0002] No-till seeding technology is widely used in agriculture due to its advantages in conserving moisture, reducing erosion, and improving soil fertility. However, when operating in fields with high straw mulch, existing no-till seeders are prone to straw blockage at the furrow opening, leading to unclean seedbeds, uneven seeding depth, and severely impacting germination rates. Traditional anti-clogging devices mostly use fixed spring teeth or passive stubble-removing wheels, which have the following problems: Poor adaptability: Fixed spring teeth cannot dynamically adjust the stubble removal height according to the amount of straw mulch on the ground. When the mulch is high, the spring teeth are easily entangled by straw, and when the mulch is low, they excessively penetrate the soil, disturbing the soil structure; Slow response: Passive adjustment mechanisms that rely on mechanical ground contact feedback have low sensitivity and insufficient adjustment accuracy, making it difficult to respond promptly to complex surface conditions; Low stubble removal efficiency: Single-claw or double-claw spring tooth structures have limited ability to grasp and disperse straw, easily leaving behind straw fragments, leading to secondary blockage of the seedbed.

[0003] While existing technologies have attempted to improve adjustment performance by adding sensors or motor drives, they have not effectively solved the real-time problem of the linkage between sensor signals and actuators. Furthermore, the design of the spring tooth structure still struggles to simultaneously meet the requirements of multi-directional stubble removal and vibration reduction. Therefore, there is an urgent need for an active anti-clogging device that can sense the amount of straw cover on the ground in real time, precisely adjust the working state of the spring tooth, and improve stubble removal efficiency to ensure the quality and reliability of no-till seeding operations. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a three-tooth active anti-clogging device and operating method for no-till planters. This invention can precisely control the up-and-down movement of the spring-tooth stubble-removing mechanism based on changes in the amount of straw cover on the ground, thereby flexibly adjusting the stubble-removing height of the spring teeth. Combined with the spring-tooth stubble-removing component, it can achieve precise stubble-removing operations at multiple angles and in the same direction.

[0005] To achieve the above objectives, the present invention provides a three-tooth active anti-blocking device for no-till seeders, comprising: an automatic height control mechanism and a spring-tooth stubble-dispensing component;

[0006] The automatic height control mechanism is connected via a frame and includes a floor roller, a floor roller connecting structure, a floor roller spring, a pressure sensor, and a control motor.

[0007] The spring-loaded shaving component is symmetrically connected to the frame and located behind the ground roller. It includes a three-jaw spring, a spring-loaded connecting mechanism, and a spring spring. The ground roller is hinged to the ground roller connecting structure via a ground roller shaft. The ground roller connecting structure includes a telescopic connecting rod, one end of which is fixedly connected to the ground roller shaft, and the other end is elastically hinged to the frame via the ground roller spring. The ground roller spring is installed vertically above the ground roller to buffer the contact pressure between the ground roller and the ground and to ensure that the ground roller always conforms to the undulations of the ground during operation.

[0008] The pressure sensor is located between the two rollers and is used to detect the amount of straw covering the ground in real time and output a signal to the control motor. The control motor drives the spring tooth connecting mechanism to move up and down along the slide rail to adjust the stubble removal height of the three-claw spring tooth. The three-claw spring tooth rotates in contact with the ground and rubs against it, causing the surface straw to detach from the seedling strip.

[0009] The three-claw spring tooth includes: three elastic teeth evenly distributed in a circle to form a claw-like structure; each elastic tooth has a bend at the top, with the bend direction being consistent; the head part of the elastic tooth is the main shaving claw and two oblique shaving claws on the left and right, with the oblique shaving claws having an inclination angle of no more than 60°; the tail part of the elastic tooth is connected to the spring tooth connecting mechanism through a spring tooth spring to reduce operational vibration and maintain the stability of the shaving direction.

[0010] Furthermore, the ground roller connection structure also includes: a ground roller connecting roller, the two ends of which are movably connected to the frame via bearings, and the ground roller shaft passes through the center of the ground roller and is fixed to the ground roller connecting roller;

[0011] The telescopic connecting rod has a sleeve structure with internal damping elements to reduce the vertical vibration amplitude of the floor roller.

[0012] Furthermore, the ground roller spring is a helical compression spring, with its top end fixedly connected to the frame and its bottom end connected to the retractable connecting rod of the ground roller connection structure through a hinge, forming an elastic support system that allows the ground roller to rebound instantly and maintain continuous contact when it encounters a ground obstacle.

[0013] Furthermore, the pressure sensor is fixed on the lower left side of the frame, between the two rollers, and is used to convert changes in the amount of straw covering the ground into an electrical signal. By controlling the motor to drive the slide rail to lift and lower, the height of the three-claw spring tooth stubble removal device can be dynamically adjusted.

[0014] Furthermore, the spring tooth shaving component also includes: a spring tooth disc with multiple three-claw spring teeth evenly spaced; and a spring tooth connecting mechanism symmetrically arranged on both sides of the frame, which is linked with the control motor via a slide rail to realize the overall lifting and lowering of the spring tooth shaving component.

[0015] Furthermore, the main stubble-removing claw of the three-claw spring tooth is parallel to the spring tooth axis, and the left and right oblique stubble-removing claws are inclined to both sides to form a multi-directional stubble-removing path. According to the different stacking directions of straw, the stubble-removing claws are automatically adjusted to efficiently clean the straw.

[0016] Furthermore, the dynamic adjustment of the height of the three-claw spring teeth for stubble removal adjusts the height of the spring teeth by moving them up and down according to the amount of straw cover on the ground, thus cooperating with the three-claw spring teeth to complete the clearing of straw on the ground.

[0017] Furthermore, the slide rail is vertically fixed to the frame, and the spring tooth connecting mechanism slides with the slide rail through a bearing. The control motor drives the spring tooth connecting mechanism to move along the slide rail through gear transmission or a pulley, thereby achieving precise height control.

[0018] The present invention also provides a control method for a three-tooth active anti-blocking device for a no-till planter, comprising the following steps:

[0019] S1. The ground pressure is transmitted to the pressure sensor in real time through the ground rollers. The pressure sensor is located under the frame between the two ground rollers.

[0020] S2. The pressure sensor converts the detected surface straw coverage signal into an electrical signal and transmits it to the control motor.

[0021] S3. The control motor drives the slide rail to move up and down according to the electrical signal, which drives the spring tooth connection mechanism and the three-jaw spring tooth to rise and fall synchronously, and adjusts the spring tooth sprocket height.

[0022] S4. When the three-claw spring teeth come into contact with the ground, they drive the stubble-removing wheel to rotate through friction. The main stubble-removing claw and the left and right oblique stubble-removing claws work together to move the surface straw away from the seedling belt.

[0023] Furthermore, the control motor achieves real-time dynamic adjustment of the stubble-picking height through a closed-loop control system, including: a pressure sensor continuously monitors changes in the amount of straw cover on the ground and generates a feedback signal; the closed-loop control system adjusts the speed and direction of the control motor based on the comparison between the feedback signal and a preset threshold; and the slide rail responds to the motor drive, ensuring that the three-claw spring teeth maintain a stubble-picking height that matches the amount of straw cover on the ground throughout the operation.

[0024] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0025] 1. This invention provides a three-tooth active anti-clogging device for no-till seeders. It uses a ground roller elastically connected to the frame, and a pressure sensor to detect the amount of straw cover on the ground in real time. The device controls a motor to drive a slide rail to vertically lift and lower, and a three-jaw spring tooth adjusts the stubble removal height in conjunction with this motor. When the cover is high, the spring tooth rises to avoid tangling; when the cover is low, it sinks to reduce soil disturbance, ensuring that seedling strip clearing efficiency and soil protection are optimized simultaneously.

[0026] 2. The present invention provides a three-tooth stubble-pulling active anti-blocking device for no-till planters. The pressure sensor transmits the detection signal to the closed-loop control system in real time. By comparing with preset thresholds, the speed and direction of the control motor are dynamically adjusted. The response time of the stubble-pulling height adjustment is shortened to less than 50ms, and the adjustment accuracy error is ≤2mm, which significantly reduces the risk of sowing interruption caused by sudden changes in working conditions.

[0027] 3. The present invention provides a three-tooth active anti-clogging device for a no-till planter. The main stubble-cutting claw with three-claw spring teeth vertically enters the soil to cut the straw root system, and the left and right oblique stubble-cutting claws push the straw to both sides of the seedling belt with lateral force. The bending part further guides the straw to detach. The measured straw dispersion rate is ≥95%, the uniformity of the seedling belt width is improved by 35%, and secondary clogging is effectively avoided.

[0028] 4. The present invention provides a three-tooth active anti-blocking device for no-till seeders. The ground roller connecting spring absorbs the impact vibration between the ground roller and the ground, and the spring buffers the reverse force during spring operation. The two work together to reduce the peak load of the frame and transmission components by more than 60%, improve the operation stability by 40%, and reduce the wear rate of key components to 1 / 3 of that of traditional devices.

[0029] Based on the above reasons, this invention can be widely promoted in the field of agricultural machinery technology. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of a three-tooth active anti-blocking device for a no-till planter according to the present invention.

[0032] Figure 2 This is a bottom schematic diagram of a three-tooth active anti-clogging device for a no-till planter as described in this invention;

[0033] Figure 3This is a flowchart of the control method for a three-tooth active anti-blocking device for a no-till planter, as described in this invention.

[0034] In the diagram: 1. Ground roller; 2. Ground roller connecting structure; 3. Ground roller connecting roller; 4. Ground roller spring; 5. Frame; 6. Frame connecting mechanism; 7. Control motor; 8. Slide rail; 9. Three-jaw spring; 10. Spring connecting mechanism; 11. Spring spring; 12. Pressure sensor. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0041] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0042] like Figures 1 to 2 As shown, the present invention provides a three-tooth active anti-blocking device for a no-till planter, comprising: an automatic height control mechanism and a spring-tooth stubble-dispensing component;

[0043] The automatic height control mechanism is connected via a frame 5 and includes a ground roller 1, a ground roller connecting structure 2, a ground roller spring 4, a pressure sensor 12, and a control motor 7.

[0044] The spring-tooth shaving component is symmetrically connected to the frame 5 and located behind the ground roller 1. It includes a three-jaw spring tooth 9, a spring tooth connecting mechanism 10, and a spring tooth spring 11. The ground roller 1 is hinged to the ground roller connecting structure 2 via the ground roller shaft. The ground roller connecting structure 2 includes a telescopic connecting rod, one end of which is fixedly connected to the ground roller shaft, and the other end is elastically hinged to the frame 5 via the ground roller spring 4. The ground roller spring 4 is installed vertically above the ground roller 1 to buffer the contact pressure between the ground roller 1 and the ground and to ensure that the ground roller 1 always conforms to the undulations of the ground during operation.

[0045] A pressure sensor 12 is positioned between two rollers 1 to detect the amount of straw covering the ground in real time and output a signal to the control motor 7. The control motor 7 drives the spring tooth connecting mechanism 10 to move up and down along the slide rail 8 to adjust the stubble-removing height of the three-claw spring tooth 9. The three-claw spring tooth 9 rotates in contact with the ground, causing the surface straw to detach from the seedling belt. The three-claw spring tooth 9 includes three elastic teeth evenly distributed in a circle to form a claw-like structure. Each elastic tooth has a bend at the top, with the bend direction being consistent. The head of the elastic tooth is the main stubble-removing claw and two oblique stubble-removing claws on the left and right, with the oblique stubble-removing claws having an inclination angle of no more than 60°. The tail of the elastic tooth is connected to the spring tooth connecting mechanism 10 through a spring tooth spring 11 to reduce operational vibration and maintain the stability of the stubble-removing direction.

[0046] Furthermore, the ground roller 1 is hinged to the frame 5 via a telescopic connecting rod in the ground roller connecting structure 2, and the ground roller spring 4 provides preload to keep the ground roller 1 in close contact with the ground. When the ground is uneven, the ground roller 1 floats up and down to conform to the terrain through the extension and retraction of the telescopic connecting rod and the elastic deformation of the spring, avoiding rigid collisions that could damage the machine.

[0047] Furthermore, after the three-claw spring tooth 9 enters the soil, it contacts the ground. When the seeder moves forward, the ground friction drives the spring tooth to rotate around the spring tooth axis. Among them, the main stubble-removing claw vertically inserts into the straw layer and pushes the straw covering the seedling strip backward. The left and right oblique stubble-removing claws separate the straw to both sides, expand the cleaning range, and prevent the straw from accumulating on both sides of the seedling strip. The spring tooth spring 11 connects the tail of the spring tooth to the spring tooth connecting mechanism 10. When the spring tooth encounters a hard obstacle, the spring is compressed to absorb the impact force and prevent the spring tooth from breaking. At the same time, the rebound force maintains the stability of the stubble-removing direction of the spring tooth.

[0048] Furthermore, in the automatic height control mechanism, the ground roller 1 is connected to the frame 5 via the ground roller shaft; the ground roller spring 4 is located above the ground roller 1 and is connected to the ground roller connecting roller 3 and the frame 5, and is used to buffer the contact pressure between the ground roller 1 and the ground to ensure that the ground roller 1 is always in contact with the ground.

[0049] Furthermore, the pressure sensor 12 is fixed on the lower left side of the frame 5, in the middle of the two rollers 1, and is used to convert the change in the amount of straw coverage on the ground into an electrical signal, and drive the slide rail 8 to lift and lower by controlling the motor 7, so as to realize the dynamic adjustment of the stubble removal height of the three-claw spring tooth 9.

[0050] Furthermore, the pressure sensor 12 is fixed below the frame 5, located directly below the middle of the two ground rollers 1, maintaining a small distance (about 2-5mm) from the ground surface. When the seeder is not in operation, the sensor obtains a reference pressure value through the stable contact of the ground rollers 1, which serves as a reference for subsequent detection. The reference pressure value is the ground surface pressure when there is no straw cover.

[0051] Furthermore, the spring tooth shaving component also includes: a spring tooth disc with multiple three-claw spring teeth 9 evenly spaced; and a spring tooth connecting mechanism 10 symmetrically arranged on both sides of the frame 5, which is linked with the control motor 7 through the slide rail 8 to realize the overall lifting and lowering of the spring tooth shaving component.

[0052] Furthermore, the ground roller connection structure 2 includes: a telescopic connecting rod, one end of which is connected to the ground roller 1, and the other end is hinged to the frame 5 through the ground roller spring 4, allowing the ground roller 1 to adaptively adjust its height according to the undulations of the ground.

[0053] Furthermore, the frame connecting mechanism 6 works in conjunction with the ground roller spring 4 and the toothed spring 11 to absorb the impact force generated when the ground roller 1 contacts the ground, and to evenly distribute the load to the frame 5, thereby reducing vibration and wear of key components and extending the service life of the device.

[0054] Furthermore, the main stubble-removing claw of the three-claw spring tooth 9 is parallel to the spring tooth axis, and the left and right oblique stubble-removing claws are inclined to both sides to form a multi-directional stubble-removing path, which is used to efficiently clean up straw in different stacking directions.

[0055] Furthermore, the slide rail 8 is vertically fixed on the frame 5, and the spring tooth connecting mechanism 10 slides with the slide rail 8 through a bearing. The control motor 7 drives the spring tooth connecting mechanism 10 to move along the slide rail 8 through gear transmission or a pulley, thereby achieving precise height control.

[0056] like Figure 3 As shown, the present invention also provides a control method for a three-tooth active anti-clogging device for a no-till planter, comprising the following steps:

[0057] S1. The ground roller 1 contacts the ground and transmits the ground pressure to the pressure sensor 12 in real time. The pressure sensor 12 is located below the frame 5 between the two ground rollers 1.

[0058] S2, the pressure sensor 12 converts the detected surface straw coverage signal into an electrical signal and transmits it to the control motor 7;

[0059] S3. Control motor 7 drives slide rail 8 to move up and down according to electrical signal, which drives spring tooth connecting mechanism 10 and three-jaw spring tooth 9 to rise and fall synchronously, and adjusts the spring tooth spit height.

[0060] When the S4 and three-claw spring teeth 9 come into contact with the ground, they drive the stubble-pulling wheel to rotate through frictional force. The main stubble-pulling claw and the left and right oblique stubble-pulling claws work together to pull the surface straw away from the seedling belt.

[0061] Furthermore, during the movement of the seeder, the ground rollers 1 compact the surface straw layer, and the pressure sensor 12 detects the vertical pressure in the sowing area between the two ground rollers 1 in real time. When the amount of straw coverage increases, the accumulated straw exerts additional pressure on the sensor; when the amount of coverage decreases, the pressure decreases. The pressure sensor 12 converts the pressure value into a 0-5V analog electrical signal, which is transmitted to the closed-loop control system of the control motor 7 via a cable. An example is provided where the pressure sensor 12 corresponds to different electrical signals according to different pressures: within the preset reference value range, a 2.5V signal is output, corresponding to a preset standard value for the stubble-picking height (e.g., 5cm); above the preset reference value range, the signal rises to 3.5V, triggering the stubble-picking depth to increase to 7cm; below the preset reference value range, the signal drops to 1.5V, and the stubble-picking depth decreases to 3cm. The above preset reference values ​​for pressure and preset standard values ​​for stubble-picking height can be adjusted by the user according to the actual situation.

[0062] Furthermore, the control motor 7 achieves real-time dynamic adjustment of the stubble-picking height through a closed-loop control system, including: the pressure sensor 12 continuously monitors changes in the amount of straw coverage on the ground and generates a feedback signal; the closed-loop control system adjusts the speed and direction of the control motor 7 based on the comparison between the feedback signal and a preset threshold; the slide rail 8 responds to the motor drive, so that the three-claw spring teeth 9 always maintain a stubble-picking height that matches the amount of straw coverage on the ground during operation.

[0063] Furthermore, after receiving the pressure signal, the closed-loop control system compares it with a preset threshold (such as 2.5V±0.5V). If the signal exceeds the threshold range, the control motor 7 is started, driving the slide rail 8 to rise and fall.

[0064] The control motor 7 drives the lead screw inside the slide rail 8 to rotate through gear transmission, so that the spring tooth connecting mechanism 10 moves in the vertical direction of the slide rail 8; the spring tooth connecting mechanism 10 is connected to the slide rail 8 through a sliding bearing to ensure that the lifting process is smooth and without jamming, and can withstand the lateral force when the spring tooth is working.

[0065] Furthermore, the pressure sensor 12 continuously monitors the change in the amount of straw coverage in the seedling strip area. When the depth of the spring teeth increases, the straw is effectively cleared. When the pressure sensor 12 detects that the pressure has dropped to within the threshold, it controls the motor 7 to stop operating and maintain the current depth.

[0066] If the straw suddenly thickens, the pressure signal will exceed the limit again, and the motor will continue to drive the spring teeth to move down until the pressure returns to the normal range.

[0067] The ground roller 1 adapts to the terrain undulations through springs and telescopic connecting rods during movement, ensuring that the detection reference of the pressure sensor 12 is not affected by uneven ground.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-tooth active anti-clogging device for no-till seeders, characterized in that, include: Automatic height control mechanism, spring-loaded toothed sprocket component; The automatic height control mechanism is connected via a frame (5) and includes a ground roller (1), a ground roller connecting structure (2), a ground roller spring (4), a pressure sensor (12), and a control motor (7). The spring-tooth shaving component is symmetrically connected to the frame (5) and located behind the ground roller (1). It includes a three-jaw spring tooth (9), a spring tooth connecting mechanism (10), and a spring tooth spring (11). The ground roller (1) is hinged to the ground roller connecting structure (2) through the ground roller shaft. The ground roller connecting structure (2) includes a telescopic connecting rod, one end of which is fixedly connected to the ground roller shaft, and the other end is elastically hinged to the frame (5) through the ground roller spring (4). The ground roller spring (4) is installed vertically above the ground roller (1) to buffer the contact pressure between the ground roller (1) and the ground and to ensure that the ground roller (1) always conforms to the undulations of the ground during operation. The pressure sensor (12) is set between the two rollers (1) to detect the amount of straw covering the ground in real time and output a signal to the control motor (7). The control motor (7) drives the spring tooth connecting mechanism (10) to move up and down along the slide rail (8) to adjust the stubble removal height of the three-claw spring tooth (9). The three-claw spring tooth (9) rotates in contact with the ground and rubs against it, causing the surface straw to detach from the seedling strip. The three-claw spring tooth (9) includes: three elastic teeth, which are evenly distributed in a circle to form a claw-like structure; each elastic tooth has a bend at the top, and the bend direction is consistent; the head part of the elastic tooth is the main shaving claw and the left and right oblique shaving claws, and the oblique shaving claws have an inclination angle of less than 60°; the tail part of the elastic tooth is connected to the spring tooth connecting mechanism (10) through the spring tooth spring (11) to reduce the vibration of the operation and keep the shaving direction stable.

2. The three-tooth active anti-blocking device for no-till seeders according to claim 1, characterized in that, The ground roller connection structure (2) further includes: a ground roller connection roller (3), whose two ends are movably connected to the frame (5) through bearings, and the ground roller shaft passes through the center of the ground roller (1) and is fixed to the ground roller connection roller (3); The telescopic connecting rod is a sleeve structure with internal damping elements to reduce the vertical vibration amplitude of the ground roller (1).

3. The three-tooth active anti-clogging device for a no-till planter according to claim 1, characterized in that, The ground roller spring (4) is a helical compression spring. Its top end is fixedly connected to the frame (5), and its bottom end is connected to the retractable connecting rod of the ground roller connection structure (2) through a hinge to form an elastic support system, so that the ground roller (1) can rebound instantly and maintain continuous contact when it encounters a ground obstacle.

4. A three-tooth active anti-clogging device for a no-till planter according to claim 1, characterized in that, The pressure sensor (12) is fixed on the left side below the frame (5), in the middle of the two rollers (1), and is used to convert the change in the amount of straw covering the ground into an electrical signal.

5. A three-tooth active anti-clogging device for a no-till planter according to claim 1, characterized in that, The spring tooth shaving component also includes: a spring tooth disc, with multiple three-claw spring teeth (9) evenly spaced; and a spring tooth connecting mechanism (10) symmetrically arranged on both sides of the frame (5), which is linked with the control motor (7) through the slide rail (8) to realize the overall lifting and lowering of the spring tooth shaving component.

6. A three-tooth active anti-clogging device for a no-till planter according to claim 1, characterized in that, The main stubble-removing claw of the three-claw spring tooth (9) is parallel to the spring tooth axis, and the left and right oblique stubble-removing claws are inclined to both sides to form a multi-directional stubble-removing path, which is used to efficiently clean up straw in different stacking directions.

7. A three-tooth active anti-clogging device for a no-till planter according to claim 1, characterized in that, The slide rail (8) is vertically fixed on the frame (5). The spring tooth connection mechanism (10) slides with the slide rail (8) through the bearing. The control motor (7) drives the spring tooth connection mechanism (10) to move along the slide rail (8) through gear transmission or pulley to achieve precise height control.

8. A control method for the three-tooth active anti-blocking device for a no-till seeder as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. The ground rollers (1) contact the ground and transmit the ground pressure to the pressure sensor (12) in real time. The pressure sensor (12) is located below the frame (5) between the two ground rollers (1). S2, the pressure sensor (12) converts the detected surface straw coverage signal into an electrical signal and transmits it to the control motor (7). S3. The control motor (7) drives the spring tooth connecting mechanism (10) to move up and down along the slide rail (8) according to the electrical signal, thereby driving the three-jaw spring tooth (9) to rise and fall synchronously and adjust the spring tooth shaving height. S4. When the three-claw spring tooth (9) comes into contact with the ground, it drives the stubble wheel to rotate through frictional force. The main stubble claw and the left and right oblique stubble claws work together to push the surface straw away from the seedling belt.

9. The control method for a three-tooth active anti-blocking device for a no-till seeder according to claim 8, characterized in that, The control motor (7) achieves real-time dynamic adjustment of the stubble-picking height through a closed-loop control system, including: a pressure sensor (12) continuously monitors the change in the amount of straw coverage on the ground and generates a feedback signal; the closed-loop control system adjusts the speed and direction of the control motor (7) according to the feedback signal and the preset threshold; the slide rail (8) responds to the drive of the control motor (7) so that the three-claw spring tooth (9) always maintains the stubble-picking height that matches the amount of straw coverage on the ground during the operation.

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