A few-tillage machine with adjustable contact pressure

Abstract

The embodiment of the utility model provides a kind of few cultivation land breakers of touch soil pressure adjustable, it is related to agricultural land breaker field.The few cultivation land breaker of touch soil pressure adjustable includes: mounting seat, land breaker single body, linear adjustment module, second connecting arm and shock absorber;The mounting seat is connected with the second connecting arm rotation, and the second connecting arm is connected with the land breaker single body at one end away from the mounting seat;The linear adjustment module is connected with the mounting seat, and one end of the shock absorber is connected with the linear adjustment module rotation, and one end of the shock absorber away from the linear adjustment module is connected with the land breaker single body rotation.The few cultivation land breaker of touch soil pressure adjustable can adjust the pressure of contact with ground, and then can be suitable for different hardness of soil and different straw covering conditions.

Description

Technical Field

[0001] This utility model relates to the field of agricultural tillage machines, specifically to a tillage machine with adjustable soil contact pressure. Background Technology

[0002] With the mechanization of agricultural production and the promotion of straw return technology, land preparation machines are playing an increasingly important role in farmland operations. After crop harvesting, a large amount of straw remains on the surface, which, if not properly handled, can affect subsequent sowing operations. Land preparation machines, through comprehensive operations such as reduced tillage, soil breaking, and leveling, can crush straw and mix it into the soil, achieving on-site straw return to the field, improving soil structure, increasing organic matter content, and thus promoting the ecological recycling of farmland. Existing land preparation machines typically include a frame, transmission mechanism, disc cutters, leveling device, and compaction device. Power output drives the cutters to rotate, thoroughly mixing the straw on the surface with the soil to achieve the purpose of straw crushing and land preparation.

[0003] However, currently used tillage machines typically have fixed contact pressure on their ground-contact components (such as leveling plates, compaction wheels, or depth limiting devices) during operation. This pressure cannot be adjusted and relies solely on the adaptive structure of the machine's shock-absorbing suspension system. Different soil hardness, moisture content, and straw cover levels in different plots require tillage machines with varying contact pressures. When there is a lot of straw or the soil is loose, a fixed contact pressure can easily lead to unstable working depth, uneven tillage, and straw accumulation. Conversely, when the soil is hard, the contact pressure may be insufficient, resulting in incomplete soil breaking up and poor surface compaction. Utility Model Content

[0004] According to an embodiment of this utility model, a tillage machine with adjustable soil contact pressure is provided. This is used to solve the problems mentioned in the background section.

[0005] In a first aspect, this utility model provides a tillage machine with adjustable soil contact pressure.

[0006] The adjustable soil contact pressure tillage machine includes: a mounting base, a tillage machine unit, a linear adjustment module, a second connecting arm, and a shock absorber; The mounting base is rotatably connected to the second connecting arm, and the end of the second connecting arm away from the mounting base is connected to the single unit of the land leveling machine. The linear adjustment module is connected to the mounting base, and one end of the shock absorber is rotatably connected to the linear adjustment module, while the end of the shock absorber away from the linear adjustment module is rotatably connected to the single unit of the leveling machine.

[0007] Preferably, the linear adjustment module includes a lead screw, two guide shafts, and a movable seat; the two guide shafts are fixedly connected to the mounting base, the lead screw is rotatably connected to the mounting base, the two guide shafts pass through the mounting base, and the movable seat is slidably connected to the guide shafts; the lead screw passes through the movable seat and is threadedly connected to the movable seat; and the shock absorber is rotatably connected to the movable seat.

[0008] Preferably, the number of shock absorbers is two.

[0009] Preferably, the linear adjustment module further includes a reinforcing plate, which is fixedly connected to the mounting base, and the lead screw is rotatably connected to the reinforcing plate.

[0010] Preferably, it also includes a motor, the output end of which is connected to the lead screw to drive the lead screw to rotate.

[0011] Preferably, the shock absorber includes a damping telescopic rod and a first spring; the first spring is sleeved on the damping telescopic rod.

[0012] Preferably, the tillage machine unit includes two bearing plates, a stubble cutting disc blade, two weed-removing wheels, two soil-cutting disc blades, a soil-crushing and pressing roller, and two depth-limiting wheels; The two bearing plates are connected to each other to form a bearing structure; the stubble cutting disc is rotatably installed between the two bearing plates; the weeding wheel is rotatably connected to the bearing plate; the two soil cutting discs are rotatably connected to the two bearing plates respectively; the soil crushing and pressing roller is rotatably connected to the bearing plate; and the two depth limiting wheels are rotatably connected to the bearing plate.

[0013] Preferably, it further includes a first connecting assembly, which includes a connecting plate, two connecting rods, a connecting seat, a second spring, and a first spring seat; the connecting plate is fixedly connected to the bearing plate, the two connecting rods are rotatably connected to the connecting plate, the connecting seat is rotatably connected to the connecting plate, and the two grass-removing wheels are rotatably connected to the connecting seat; one end of the second spring contacts the connecting rod, the other end of the second spring contacts the first spring seat, the first spring seat is rotatably connected to the bearing plate, a first rod is provided on the first spring seat, the first rod passes through the first spring seat and is slidably connected to the first spring seat, and the first rod passes through the second spring and is rotatably connected to the connecting rod.

[0014] Preferably, it further includes a second connecting assembly; the second connecting assembly includes a first connecting arm, a second spring seat, a second rod, and a third spring; the first connecting arm is rotatably connected to the bearing plate, the second spring seat is rotatably connected to the bearing plate, the second rod passes through the second spring seat and is slidably connected to the second spring seat, the second rod is rotatably connected to the first connecting arm, the third spring is sleeved on the second rod, one end of the third spring contacts the first connecting arm, the other end of the third spring contacts the second spring seat, and the two pressing wheels are rotatably connected to the first connecting arm.

[0015] Preferably, the tillage machine unit also includes a subsoiler shovel, which is fixedly connected to the bearing plate.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: This utility model provides a tillage machine with adjustable soil contact pressure. Driven by a linear adjustment module, the end of the shock absorber furthest from the tillage machine unit moves downward, thereby changing the relative angle between the shock absorber and the second connecting arm. As the shock absorber angle changes, its internal elastic element is further compressed, reducing the supporting reaction force exerted by the shock absorber on the tillage machine unit. Under the combined action of its own weight and external tension, the tillage machine unit shifts downward, increasing the pressure exerted on the ground. This results in a tighter contact between the blades or leveling components and the ground, facilitating thorough tilling and straw shredding in harder soils or areas with thick straw cover. Conversely, when it is necessary to reduce the soil contact pressure of the tillage machine unit, the linear adjustment module is controlled to move the end of the shock absorber furthest from the tillage machine unit in a second direction. This achieves adjustment of soil contact pressure, solving the current problem of unadjustable soil contact pressure.

[0017] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A first-view perspective three-dimensional structural schematic diagram of a soil-pressure adjustable tillage machine according to Embodiment 1 of the present invention is shown. Figure 2 A second-view perspective three-dimensional structural schematic diagram of a soil-pressure adjustable tillage machine according to Embodiment 1 of the present invention is shown. Figure 3 The diagram shows a third-view perspective three-dimensional structural schematic of a soil-pressure adjustable tillage machine according to Embodiment 1 of the present invention. Figure 4 An exploded structural diagram of a soil-pressure adjustable tillage machine according to Embodiment 1 of the present invention is shown. Figure 5 A cross-sectional structural schematic diagram of a soil-pressure adjustable tillage machine according to Embodiment 1 of the present invention is shown. Figure 6 An exploded structural diagram of the shock absorber of a soil-pressure adjustable tillage machine according to Embodiment 1 of the present invention is shown.

[0019] Explanation of reference numerals in the attached figures 1-Mounting base, 2-Tillage machine unit, 21-Bearing plate, 22-Stubble cutting disc blade, 23-Weeding wheel, 24-Soil cutting disc blade, 25-Soil crushing and compaction roller, 26-First connecting assembly, 261-Connecting plate, 262-Connecting rod, 263-Connecting seat, 264-Second spring, 265-First spring seat, 266-First rod body, 27-Second connecting assembly, 271-First connecting arm, 272-Second spring seat, 273-Second rod body, 274-Third spring, 28-Deep loosening shovel, 29-Depth limiting wheel, 3-Linear adjustment module, 31-Screw screw, 32-Guide shaft, 33-Moving seat, 34-Reinforcing plate, 35-Motor, 4-Second connecting arm, 5-Shock absorber, 51-Damping telescopic rod, 52-First spring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] Example 1 like Figures 1 to 6As shown, the adjustable soil contact pressure tillage machine includes a mounting base 1, a tillage unit 2, a linear adjustment module 3, a second connecting arm 4, and a shock absorber 5. The mounting base 1 is rotatably connected to the second connecting arm 4, and the end of the second connecting arm 4 away from the mounting base 1 is connected to the tillage unit 2. The linear adjustment module 3 is connected to the mounting base 1, and one end of the shock absorber 5 is rotatably connected to the linear adjustment module 3, while the end of the shock absorber 5 away from the linear adjustment module 3 is rotatably connected to the tillage unit 2.

[0023] In use, the mounting base 1 is connected to an existing tractor. The tractor's movement propels the tillage unit 2 along the farmland, performing tasks such as soil breaking, leveling, and straw chopping. When the tillage unit operates on plots with different soil conditions or varying straw coverage, the contact pressure between the tillage unit 2 and the ground needs to be adjusted according to the ground hardness and resistance. This embodiment achieves dynamic adjustment of the contact pressure through a combination of the linear adjustment module 3 and the shock absorber 5.

[0024] Specifically, when it is necessary to increase the ground contact pressure of the tillage machine unit 2, the linear adjustment module 3 drives the end of the shock absorber 5 away from the tillage machine unit 2 to move in the first direction, thereby changing the relative angle between the shock absorber 5 and the second connecting arm 4. As the angle of the shock absorber 5 changes, its internal elastic element is further compressed, the supporting reaction force exerted by the shock absorber 5 on the tillage machine unit 2 decreases, and the tillage machine unit 2 shifts downward under the combined action of its own weight and external tension, thereby increasing the pressure of the tillage machine unit 2 on the ground, making the contact between the blades or leveling components and the ground more compact, which facilitates sufficient tillage and straw shredding operations in harder plots or areas with thick straw cover.

[0025] Conversely, when it is necessary to reduce the ground contact pressure of the tillage machine unit 2, the linear adjustment module 3 is controlled to move the end of the shock absorber 5 away from the tillage machine unit 2 in a second direction. At this time, the installation angle of the shock absorber 5 changes accordingly, the compression inside the shock absorber 5 decreases, and the supporting reaction force on the tillage machine unit 2 increases, thereby slightly raising the tillage machine unit 2 and reducing its downward pressure on the ground, avoiding excessive compaction or sinking in soft or wet soil. Through the above adjustment process, the ground contact pressure can be flexibly adjusted according to different working environments, ensuring consistent tillage depth and stable work quality.

[0026] Furthermore, the shock absorber 5 also plays a role in buffering and vibration reduction during the operation of the tillage machine. When the tillage machine unit 2 is running on uneven ground or on surfaces containing a lot of straw and gravel, the impact force from the ground will be transmitted to the shock absorber 5 through the second connecting arm 4. The elastic mechanism inside the shock absorber 5 absorbs and releases part of the impact energy, thereby reducing the vibration of the tillage machine unit 2 and improving the stability and reliability of the tillage operation. The linear output characteristics of the linear adjustment module 3 make the change process of the ground pressure smooth and controllable, and will not produce sudden loads on the traction vehicle or implements, ensuring the stability and durability of the overall structure in long-term operation.

[0027] In this embodiment, the linear adjustment module 3 includes a lead screw 31, two guide shafts 32, and a movable seat 33. The two guide shafts 32 are fixedly connected to the mounting base 1, defining the movement direction of the movable seat 33 and providing a parallel guiding reference. The lead screw 31 is rotatably connected to the mounting base 1, and both guide shafts 32 pass through the mounting base 1. The movable seat 33 is slidably fitted onto the guide shafts 32, allowing it to move stably along the axial direction of the guide shafts 32. The lead screw 31 passes through the movable seat 33 and is threadedly connected to it; the threaded pair structure between the movable seat 33 and the lead screw 31 enables the mutual conversion between rotational and linear motion. One end of the shock absorber 5 is rotatably connected to the movable seat 33. When the movable seat 33 moves along the guide shafts 32, it causes a change in the installation angle of the shock absorber 5, thereby altering the force state and compression degree of the shock absorber 5.

[0028] During use, the lead screw 31 is rotated by external power or manually. The rotation of the screw 31 drives the moving seat 33 to move linearly along the guide shaft 32. Because the guide shaft 32 provides precise linear guidance throughout its stroke, the movement of the moving seat 33 is smooth and without deviation, avoiding jamming or localized wear caused by skewness. When the moving seat 33 moves forward or backward, the position of its hinge point with the shock absorber 5 changes, thus changing the angle between the shock absorber 5 and the second connecting arm 4. This angle change directly affects the compression of the shock absorber 5: when the lead screw 31 drives the moving seat 33 downward, the angle of the shock absorber 5 decreases, its internal elastic element is further compressed, thereby reducing its output support force and increasing the downward pressure on the leveling machine unit 2; conversely, when the lead screw 31 drives the moving seat 33 upward, the angle of the shock absorber 5 increases, its compression decreases, and the output support force increases accordingly, thereby reducing the ground contact pressure on the leveling machine unit 2.

[0029] In this embodiment, there are two shock absorbers 5, which are symmetrically arranged on both sides of the leveling machine unit 2. This dual shock absorber arrangement ensures more even force distribution on the leveling machine unit 2 during ground contact operation, effectively avoiding problems such as tilting, uneven loading, or inconsistent leveling depth caused by unilateral force application. The dual shock absorbers 5 work together to share the impact and vibration loads from the ground, thereby improving the overall machine's seismic resistance and operational stability.

[0030] In this embodiment, the linear adjustment module 3 further includes a reinforcing plate 34, which is fixedly connected to the mounting base 1, and the lead screw 31 is rotatably connected to the reinforcing plate 34. The reinforcing plate 34 enhances the connection strength between the lead screw 31 and the mounting base 1, making the lead screw 31 less prone to shaking or deviation when transmitting force and making adjustment movements. Since the lead screw 31 bears axial thrust and lateral reaction force during adjustment, the reinforcing plate 34 can form a rigid support structure, improve the stability of the guide shaft 32, ensure the linear accuracy of the moving seat 33 when sliding along the guide shaft 32, and prevent the adjustment accuracy of the ground pressure from being affected by structural deformation.

[0031] In this embodiment, the shock absorber 5 includes a damping telescopic rod 51 and a first spring 52, with the first spring 52 sleeved on the damping telescopic rod 51. The damping telescopic rod 51 is used to transmit force between the tillage machine unit 2 and the mounting base 1 and absorb ground impact loads. Its internal damping mechanism can dissipate energy during reciprocating motion, thereby reducing instantaneous impact force. The first spring 52 undergoes elastic deformation when the tillage machine is subjected to external vibration or ground undulation, providing rebound support for the tillage machine unit 2 and keeping the ground contact force of the tillage machine within a reasonable range. When the linear adjustment module 3 changes the installation angle of the shock absorber 5, the preload and compression of the first spring 52 change accordingly, realizing continuous control of the ground contact pressure. Through the synergistic effect of the damping telescopic rod 51 and the first spring 52, the shock absorber 5 can simultaneously possess the dual functions of buffering and support, not only reducing the impact of ground impacts on the tillage machine but also improving the stability and reliability of operation.

[0032] In this embodiment, the tillage machine unit 2 includes two support plates 21, a stubble-cutting disc blade 22, two weed-removing wheels 23, two soil-cutting disc blades 24, a soil-crushing and pressing roller 25, and two depth-limiting wheels 29. The two support plates 21 are interconnected to form a stable overall support structure, which supports the various working components of the tillage machine unit 2 and withstands the reaction force generated during operation. The stubble-cutting disc blades 22 are rotatably mounted between the two support plates 21 and rotated by traction power. They are used to cut surface straw and weeds during operation, cutting long strips of straw into shorter segments so that the subsequent seeder can pass smoothly, improving the sowing effect under straw return conditions.

[0033] The weed-removing wheel 23 is rotatably connected to the bearing plate 21 and is typically positioned behind the stubble-cutting disc blade 22. The main function of the weed-removing wheel 23 is to disperse the cut straw, weeds, and loose soil to both sides, preventing the accumulation of weeds or straw in the work path and ensuring the continuous and stable operation of other working components. The rotation of the weed-removing wheel 23 effectively reduces straw entanglement and blockage, making the land preparation process smoother.

[0034] The two cutting disc blades 24 are used to further break up and level large clumps of compacted soil that appear on the surface of the cultivated land after the deep loosening shovel has passed through.

[0035] The two depth-limiting wheels 29 are rotatably connected to the two bearing plates 21, respectively. Their function is to limit the sinking depth of the tillage machine unit 2's ground-working components. The depth-limiting wheels 29 can control the working depth by rolling and supporting the ground, preventing the implement from sinking too deep into the soil, which would lead to excessive power consumption or uneven working layer thickness. The setting of the depth-limiting wheels 29 keeps the tillage depth consistent, thereby helping to form a uniform tillage layer and improving the quality of operation.

[0036] The soil-crushing and compaction roller 25 is rotatably connected to the bearing plate 21 and is located at the tail end of the tillage machine unit 2. The soil-crushing and compaction roller 25 is mainly used to crush, cover, and compact the surface soil after tillage operations. Through the rolling action of the soil-crushing and compaction roller 25, the loose surface soil can be compacted, allowing the straw to fully contact and be covered with the soil. This reduces moisture evaporation, increases the straw decomposition rate, and improves the flatness of the sowing layer, providing a good foundation for subsequent sowing.

[0037] In this embodiment, a first connecting assembly 26 is also included. The first connecting assembly 26 includes a connecting plate 261, two connecting rods 262, a connecting seat 263, a second spring 264, and a first spring seat 265. The connecting plate 261 is fixedly connected to the bearing plate 21 and provides an installation base for the first connecting assembly 26. The two connecting rods 262 are rotatably connected to the connecting plate 261, forming a support and guiding mechanism for the grass-removing wheels 23. The connecting seat 263 is rotatably connected to the connecting plate 261, and the two grass-removing wheels 23 are respectively mounted on the connecting seat 263 and can rotate relative to each other, allowing the grass-removing wheels 23 to roll freely on the ground. One end of the second spring 264 contacts the connecting rod 262, and the other end contacts the first spring seat 265, which is rotatably connected to the bearing plate 21. A first rod 266 is provided on the first spring seat 265. The first rod 266 passes through the first spring seat 265 and is slidably connected to it. At the same time, it passes through the second spring 264 and is rotatably connected to the connecting rod 262. Through this structural arrangement, an elastic support mechanism is formed between the connecting rod 262, the second spring 264, and the first rod 266, enabling the grass-reeling wheel 23 to float and rebound in accordance with the terrain during operation.

[0038] During land preparation, the second spring 264 is in a compressed or pre-tensioned state, providing a continuous downward elastic force to the connecting rod 262, thus ensuring that the weed-removing wheel 23 remains in contact with the ground. When the land preparation machine operates on flat ground, the weed-removing wheel 23 rolls stably under the action of the second spring 264, effectively dispersing and clearing straw and weeds. When the land preparation machine encounters raised or uneven areas, the weed-removing wheel 23 is displaced by an upward thrust from the ground, moving upward at the raised area and causing the connecting rod 262 to rotate around the rotation point of the connecting plate 261. As the connecting rod 262 rotates, its relative position to the first rod 266 changes, causing the first rod 266 to extend along the sliding direction of the first spring seat 265, while the second spring 264 is further compressed. Through this process, the second spring 264 absorbs the instantaneous impact force caused by uneven ground, and after the bump passes, it restores the grass-removing wheel 23 to its original position through elastic rebound, so that the grass-removing wheel 23 continues to adhere to the ground and maintains the continuity of the cleaning action.

[0039] The elastic floating structure gives the straw-removing wheel 23 excellent adaptability to different terrains. Regardless of surface undulations, straw accumulation, or localized depressions, the straw-removing wheel 23 can automatically adjust under the elastic force of the second spring 264. This avoids excessive impact between the straw-removing wheel 23 and the ground, and prevents it from malfunctioning due to suspension, thus significantly improving the operational stability and reliability of the tillage machine. Simultaneously, the coordinated movement of the connecting rod 262 and the first rod 266 ensures that the straw-removing wheel 23 maintains a reasonable posture during its up-and-down floating process, resulting in uniform straw dispersion, preventing straw accumulation or tangling, and improving the continuity and quality of tillage operations.

[0040] In this embodiment, a second connecting assembly 27 is also included. The second connecting assembly 27 includes a first connecting arm 271, a second spring seat 272, a second rod 273, and a third spring 274. The first connecting arm 271 is rotatably connected to the bearing plate 21 and is used to support the soil compaction roller 25 and enable its oscillating movement with the undulation of the ground. The second spring seat 272 is rotatably connected to the bearing plate 21 and serves as the mounting base for the third spring 274. The second rod 273 passes through the second spring seat 272 and is slidably connected to it. One end of the second rod 273 is rotatably connected to the first connecting arm 271, allowing the second rod 273 to move axially with the rotation of the first connecting arm 271. The third spring 274 is sleeved on the second rod 273. One end of the third spring 274 abuts against the first connecting arm 271, and the other end abuts against the second spring seat 272, forming an elastic support structure. The soil compaction roller 25 is rotatably connected to both ends of the first connecting arm 271, so that it can continuously contact the ground and perform rolling compaction during operation.

[0041] In the initial state, the third spring 274 is in a pre-tensioned state, providing continuous elastic force to the first connecting arm 271, ensuring reliable contact between the soil compaction roller 25 and the ground. As the tillage machine moves through the farmland, the soil compaction roller 25 maintains a stable ground pressure under the action of the third spring 274, thereby achieving soil compaction, breaking up, and covering operations. When the soil compaction roller 25 reaches a raised area of ​​the ground, it is pushed upwards by the ground reaction force, causing it to move upwards with the terrain, driving the first connecting arm 271 to rotate around its connection point with the bearing plate 21. During this process, the rotation of the first connecting arm 271 causes the second rod 273 to move axially relative to the second spring seat 272, extending the second rod 273 out of the second spring seat 272, while the third spring 274 is compressed.

[0042] As the third spring 274 is compressed, its internal elastic potential energy increases, thereby generating a restoring force on the first connecting arm 271. After the ground protrusion passes, under the elastic restoring action of the third spring 274, the first connecting arm 271 drives the soil compaction roller 25 to return to its original position, allowing the soil compaction roller 25 to re-adhere to the ground, maintaining the continuity and stability of the compaction operation. During this process, the second rod 273 and the second spring seat 272 not only slide relative to each other, but also achieve a certain angle of rotation at the rotating connection, ensuring smooth mechanical transmission of the entire second connecting assembly 27 during force and displacement, avoiding rigid impact and structural jamming.

[0043] In this embodiment, the tillage machine unit 2 further includes a deep loosening shovel 28, which is fixedly connected to the bearing plate 21. The deep loosening shovel 28 is located in front of the soil crushing and pressing roller 25, and its lower end is provided with a pointed conical cutting end, which is used to insert into the middle of the soil layer during tillage operations to deeply crush and loosen the soil.

[0044] Unlike traditional tillage methods, this implementation method adopts the concept of "deep loosening and less tillage". The deep loosening shovel 28 loosens the subsoil without turning the surface soil, which can improve the soil's aeration and water permeability while retaining the surface straw cover layer, thereby reducing water evaporation and nutrient loss.

[0045] Example 2 The difference between this embodiment and the previous embodiment is that it also includes a motor 35, the output end of which is connected to the lead screw 31 to drive the lead screw 31 to rotate. During use, the motor 35 provides a continuously controllable torque through its output end, causing the lead screw 31 to rotate around its own axis, thereby driving the moving seat 33 to move linearly along the guide shaft 32, realizing the adjustment of the installation angle of the shock absorber 5 and the adjustment of the ground contact pressure of the ground leveling machine unit 2.

[0046] Compared to the aforementioned manual or externally driven lead screw 31 method, the introduction of motor 35 enables automated and precise control of ground contact pressure. Operators can adjust the speed and direction of rotation of motor 35 via a control device, thereby quickly and smoothly changing the compression level of shock absorber 5, allowing the ground contact pressure of the tillage machine unit 2 to adapt to different ground hardness, soil moisture, and straw mulch conditions. The application of motor 35 not only improves operational efficiency but also reduces operational intensity, while dynamically adjusting the ground contact pressure during the tillage machine's movement, ensuring the uniformity and continuity of tillage operations.

[0047] Furthermore, to enhance the automation level of this tillage machine, a pressure sensor (not shown in the figure) can be installed on the tillage machine unit 2, and a corresponding control terminal can be installed in the cab of the traction equipment. The pressure sensor is used to detect the soil contact pressure of the tillage machine unit 2 in real time and transmit the detection signal to the control terminal in the cab. Based on the pressure data fed back by the pressure sensor, the control terminal can automatically control the motor 35 to drive the lead screw 31 to rotate in both directions, causing the moving seat 33 to adjust its position along the guide shaft 32, thereby changing the compression degree of the shock absorber 5, and thus realizing real-time dynamic adjustment of the tillage machine's soil contact pressure during travel.

[0048] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tillage machine with adjustable soil contact pressure, characterized in that, include: Mounting base (1), grounding machine unit (2), linear adjustment module (3), second connecting arm (4) and shock absorber (5); The mounting base (1) is rotatably connected to the second connecting arm (4), and the end of the second connecting arm (4) away from the mounting base (1) is connected to the land leveling machine unit (2); The linear adjustment module (3) is connected to the mounting base (1), and one end of the shock absorber (5) is rotatably connected to the linear adjustment module (3), while the end of the shock absorber (5) away from the linear adjustment module (3) is rotatably connected to the ground leveling machine unit (2).

2. The adjustable soil contact pressure tillage machine according to claim 1, characterized in that, The linear adjustment module (3) includes a lead screw (31), two guide shafts (32) and a movable seat (33); the two guide shafts (32) are fixedly connected to the mounting base (1), the lead screw (31) is rotatably connected to the mounting base (1), the two guide shafts (32) pass through the mounting base (1), and the movable seat (33) is slidably connected to the guide shafts (32), the lead screw (31) passes through the movable seat (33) and is threadedly connected to the movable seat (33), and the shock absorber (5) is rotatably connected to the movable seat (33).

3. The adjustable soil contact pressure tillage machine according to claim 2, characterized in that, The number of shock absorbers (5) is two.

4. The adjustable soil contact pressure tillage machine according to claim 2, characterized in that, The linear adjustment module (3) also includes a reinforcing plate (34), which is fixedly connected to the mounting base (1), and the lead screw (31) is rotatably connected to the reinforcing plate (34).

5. The adjustable soil contact pressure tillage machine according to claim 2, characterized in that, It also includes a motor (35), the output end of which is connected to the lead screw (31) for driving the lead screw (31) to rotate.

6. The adjustable soil contact pressure tillage machine according to claim 1, characterized in that, The shock absorber (5) includes a damping telescopic rod (51) and a first spring (52); the first spring (52) is sleeved on the damping telescopic rod (51).

7. The adjustable soil contact pressure tillage machine according to claim 1, characterized in that, The land preparation machine unit (2) includes two bearing plates (21), a stubble cutting disc (22), two weeding wheels (23), two soil cutting discs (24), a soil crushing and pressing roller (25), and two depth limiting wheels (29). The two bearing plates (21) are connected to each other to form a bearing structure; the stubble cutting disc (22) is rotatably installed between the two bearing plates (21); the grass-removing wheel (23) is rotatably connected to the bearing plate (21); the two soil-cutting discs (24) are rotatably connected to the two bearing plates (21) respectively; the soil-crushing and pressing roller (25) is rotatably connected to the bearing plate (21); and the two depth-limiting wheels (29) are rotatably connected to the bearing plate (21).

8. The adjustable soil contact pressure tillage machine according to claim 7, characterized in that, It also includes a first connecting assembly (26), which includes a connecting plate (261), two connecting rods (262), a connecting seat (263), a second spring (264), and a first spring seat (265); the connecting plate (261) is fixedly connected to the bearing plate (21), the two connecting rods (262) are rotatably connected to the connecting plate (261), the connecting seat (263) is rotatably connected to the connecting plate (261), and the two grass-removing wheels (23) are rotatably connected to the connecting seat (263); the second spring One end of (264) is in contact with the connecting rod (262), and the other end of the second spring (264) is in contact with the first spring seat (265). The first spring seat (265) is rotatably connected to the bearing plate (21). A first rod (266) is provided on the first spring seat (265). The first rod (266) passes through the first spring seat (265) and is slidably connected to the first spring seat (265). The first rod (266) passes through the second spring (264) and is rotatably connected to the connecting rod (262).

9. The adjustable soil contact pressure tillage machine according to claim 7, characterized in that, It also includes a second connecting assembly (27); the second connecting assembly (27) includes a first connecting arm (271), a second spring seat (272), a second rod (273) and a third spring (274); the first connecting arm (271) is rotatably connected to the bearing plate (21), the second spring seat (272) is rotatably connected to the bearing plate (21), the second rod (273) passes through the second spring seat (272) and is slidably connected to the second spring seat (272), the second rod (273) is rotatably connected to the first connecting arm (271), the third spring (274) is sleeved on the second rod (273), one end of the third spring (274) contacts the first connecting arm (271), the other end of the third spring (274) contacts the second spring seat (272), and the soil compaction roller (25) is rotatably connected to the first connecting arm (271).

10. The adjustable soil contact pressure tillage machine according to claim 7, characterized in that, The tillage machine unit (2) also includes a deep loosening shovel (28), which is fixedly connected to the bearing plate (21).

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