A device for low-yield field soil reformation in hilly areas

Abstract

This invention relates to the field of soil improvement technology, specifically to a device for soil improvement in low- and medium-yield fields in hilly areas. The device includes a main body with at least one tillage component rotatably mounted at its bottom. The tillage component is used for soil improvement and includes two mounting lugs symmetrically distributed along the width of the main body, and a fixed shaft rotatably mounted between the two mounting lugs. The outer wall of the fixed shaft has multiple annular limiting grooves, and a movable roller sleeve is rotatably mounted around the fixed shaft. This invention, through the movable roller sleeve rotatable relative to the fixed shaft and in conjunction with an elastically triggered locking and limiting structure, can automatically trigger a force-dissipating deflection when the tillage blades encounter stones, thus avoiding damage to the tillage components and the entire device from rigid impacts. This significantly extends the device's service life, reduces the operating costs of soil improvement in low-yield areas, and improves the continuity and stability of operations.

Description

Technical Field

[0001] This invention relates to the field of soil improvement technology, specifically to a device for improving low- and medium-yield farmland soil in hilly areas. Background Technology

[0002] In hilly and low-yield areas, soil often suffers from problems such as compaction, infertility, sandification, and salinization. Soil improvement is a key means to increase crop yields and improve soil quality in these areas. As a basic step in soil improvement, the effectiveness of soil turning and the stability of the equipment directly affect the overall improvement efficiency and cost. Currently, various soil turning and modification devices are available on the market for loosening and turning soil in low-yield areas, providing the basic conditions for subsequent processes such as applying soil conditioners and mixing soil. However, existing soil modification devices for low-yield areas have a prominent technical defect in the turning process: they lack the ability to identify stones in the soil. Low-yield areas, especially mountainous and hilly areas, often contain a large number of stones of different sizes. These stones are buried at varying depths and are randomly distributed. The turning components of existing devices (such as turning shovels and breaking rollers) cannot identify the location of stones in the soil in advance during operation, and can only blindly turn the soil.

[0003] When the soil-turning components collide with stones in the soil, they cause direct damage, such as deformation of the turning shovel, wear and breakage of the cutter roller teeth, and even jamming or damage to the transmission mechanism. This significantly shortens the service life of the device, increases equipment maintenance costs and downtime, and affects the efficiency of continuous soil improvement operations. On the other hand, the impact force generated by the collision is transmitted back to the device body, causing the overall vibration of the device to intensify. This not only affects the stability of the turning depth and reduces the quality of the turning operation, but may also cause indirect damage to precision components such as the device's electrical control module and power unit, further reducing the reliability of the device. In view of this, we propose a device for soil improvement of low- and medium-yield fields in hilly areas to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides the following technical solution: a device for soil improvement of low- and medium-yield fields in hilly areas, comprising a main body, at least one tillage component rotatably mounted at the bottom of the main body, the tillage component being used for soil improvement, the tillage component including two mounting lugs symmetrically distributed along the width of the main body, and a fixed rotating shaft rotatably mounted between the two mounting lugs, the outer wall of the fixed rotating shaft having multiple limiting grooves in a ring, a movable roller sleeve rotatably mounted around the fixed rotating shaft, multiple annularly distributed tillage and soil-breaking blades fixedly mounted around the movable roller sleeve, elastic arch plates fixedly mounted on the tillage and soil-breaking blades, the elastic arch plates being arched away from the tillage and soil-breaking blades and possessing elasticity, multiple positioning pins annularly distributed on the inner wall of the movable roller sleeve, a linkage block rotatably mounted around the positioning pins, the end of the linkage block engaging inside the limiting groove.

[0005] As a preferred embodiment of the present invention, multiple limiting slots are provided at equal intervals along the axial direction of the fixed rotating shaft.

[0006] As a preferred embodiment of the present invention, the position of the tillage and soil breaking blade corresponds one-to-one with the position of the positioning pin. The outer wall of the movable roller sleeve is provided with multiple annularly distributed through grooves extending into it. The through grooves are located on one side of the tillage and soil breaking blade. The elastic arch plate passes through the through grooves and extends into the interior of the movable roller sleeve. A linkage top block is fixedly installed at the end of the elastic arch plate away from the tillage and soil breaking blade.

[0007] As a preferred embodiment of the present invention, the movable roller sleeve is a cylindrical cavity structure with one side open. An end cap is fixedly installed on the open side of the movable roller sleeve. A limiting protrusion ring is integrally provided on the side of the end cap near the movable roller sleeve. The limiting protrusion ring is coaxial with the movable roller sleeve. A rotating collar is rotatably installed around the limiting protrusion ring. Multiple deflection arms are integrally provided on the outer wall of the rotating collar. The number and position of the deflection arms correspond one-to-one with the linkage block. A deflection hole is provided through the side of the deflection arm near the end cap. The outer wall of the linkage top block away from the elastic arch plate abuts against the side of the deflection arm.

[0008] As a preferred embodiment of the present invention, each side of the linkage block is integrally provided with a first connecting pin, and a connecting rod is hinged to the periphery of the first connecting pin. A second connecting pin is integrally provided on the side of the connecting rod near the end cover. The second connecting pin and the first connecting pin are symmetrical about the central angle of the connecting rod. The second connecting pin is rotatably installed inside the deflection hole at the corresponding position.

[0009] As a preferred embodiment of the present invention, a third connecting pin is arranged in a ring on the inner wall of the movable roller sleeve. The third connecting pin is located between two adjacent linkage blocks. A tension spring is fixedly installed between the third connecting pin 2019 and the first connecting pin. In the initial state, the tension spring is in a slightly stretched state, which can continuously pull the first connecting pin to deflect towards the third connecting pin. This is suitable for the end of the linkage block to always be tightly engaged in the limiting groove when the tillage assembly rotates as a whole.

[0010] As a preferred embodiment of the present invention, guide grooves for accommodating the sliding guide of the linkage top block are provided on the opposing surfaces of the movable roller sleeve and the end cover, and the linkage top block is slidably installed inside the guide grooves provided on the opposing surfaces of the movable roller sleeve and the end cover.

[0011] As a preferred embodiment of the present invention, the diameter of the slot is slightly larger than the diameter of the elastic arch plate, and the elastic arch plate is movable inside the slot.

[0012] As a preferred embodiment of the present invention, a driven sprocket is fixedly installed at the end of the fixed rotating shaft, a gasoline engine is fixedly installed at the top of the main body of the device, a transmission shaft is fixedly connected to the end of the output shaft of the gasoline engine through a coupling, a driving sprocket is fixedly installed at the end of the transmission shaft away from the gasoline engine, and a transmission chain is sleeved around the driving sprocket and the driven sprocket.

[0013] As a preferred embodiment of the present invention, a connecting bracket is fixedly installed on the side of the main body of the device, and the main body of the device is fixedly connected to the connecting end of the traction tractor through the connecting bracket.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention, through a movable roller sleeve that can rotate relative to a fixed shaft and a snap-fit ​​limiting structure that is elastically triggered, can automatically trigger a force-dissipating deflection when the tillage blades encounter stones, thus avoiding the damage to the tillage components and the entire device from rigid impacts. This significantly extends the service life of the device, reduces the operating cost of soil improvement in low-yield areas, and improves the continuity and stability of operations.

[0016] 2. In this invention, after the tillage and soil-breaking blade clears the stones, the elastic arch plate is no longer subjected to the squeezing resistance of the stones and returns to its original position due to its own elasticity. The tension spring also pulls the deflection linkage rod to return to its original position, so that the linkage block re-engages into the limiting groove of the next corresponding position, restoring the relative fixation of the movable roller sleeve and the fixed rotating shaft. The tillage and soil-breaking blade returns to the normal tillage operation state and continues to carry out soil loosening and transformation operations in low-yield areas.

[0017] 3. In this invention, when one of the tillage and soil-breaking blades encounters a rock, the remaining tillage and soil-breaking blades distributed along the fixed rotating shaft can still operate normally. The entire device will not stop due to a single impact, and there is no need for the operator to manually reset it. The operating efficiency is significantly improved compared with the traditional rigid fixed tillage device, and it is more suitable for low-yield mountainous and hilly areas with complex soil conditions and dense distribution of rocks. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the tillage component in this invention;

[0020] Figure 3 This is a schematic diagram of the structure of the fixed rotating shaft in this invention;

[0021] Figure 4 This is a partial structural diagram of the tillage component in this invention;

[0022] Figure 5 This is a schematic diagram of the unfolded structure of the end cap and movable roller sleeve in this invention;

[0023] Figure 6 This is a schematic diagram of the end cap structure in this invention;

[0024] Figure 7 This is a front structural diagram of the movable roller sleeve in this invention;

[0025] Figure 8 In this invention Figure 7 A schematic diagram of the three-dimensional structure;

[0026] Figure 9 This is a schematic diagram of the rotating collar in this invention;

[0027] Figure 10 This is a schematic diagram of the linkage block in this invention;

[0028] Figure 11 In this invention Figure 10 A partially enlarged structural diagram.

[0029] In the diagram: 100, main body of the device; 200, tillage component; 201, mounting lug; 202, fixed rotating shaft; 203, limiting groove; 204, movable roller sleeve; 205, tillage blade; 206, positioning pin; 207, linkage block; 208, through groove; 209, elastic arch plate; 2010, linkage top block; 2011, end cap; 2012, limiting protrusion ring; 2013, rotating collar; 2014, Deflection arm; 2015, Deflection hole; 2016, First connecting pin; 2017, Connecting rod; 2018, Second connecting pin; 2019, Third connecting pin; 2020, Tension spring; 2021, Guide groove; 2022, Driven sprocket; 2023, Gasoline engine; 2024, Drive shaft; 2025, Drive sprocket; 2026, Drive chain; 300, Connecting bracket. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 11 The technical solution provided by the present invention specifically includes the following embodiments:

[0032] A device for soil improvement in low- and medium-yield fields in hilly areas includes a main body 100. At least one tillage component 200 is rotatably mounted on the bottom of the main body 100. The tillage component 200 is used for soil improvement. The tillage component 200 includes two mounting lugs 201 symmetrically distributed along the width of the main body 100, and a fixed rotating shaft 202 rotatably mounted between the two mounting lugs 201. Multiple limiting grooves 203 are annularly formed on the outer wall of the fixed rotating shaft 202. A movable roller sleeve 204 is rotatably mounted around the fixed rotating shaft 202. Multiple annularly distributed tillage and soil-breaking blades 205 are fixedly mounted around the movable roller sleeve 204. Elastic arch plates 209 are fixedly mounted on the tillage and soil-breaking blades 205. The elastic arch plates 209 are arched away from the tillage and soil-breaking blades 205 and are elastic. The movable roller sleeve 204 contains... Multiple positioning pins 206 are arranged in a ring on the side wall. A linkage block 207 is rotatably installed around the positioning pins 206. The end of the linkage block 207 is engaged in the inside of the limiting slot 203. Multiple limiting slots 203 are arranged at equal intervals along the axial direction of the fixed rotating shaft 202. A connecting bracket 300 is fixedly installed on the side of the device body 100. The device body 100 is fixedly connected to the connecting end of the traction tractor through the connecting bracket 300. A driven sprocket 2022 is fixedly installed at the end of the fixed rotating shaft 202. A gasoline engine 2023 is fixedly installed on the top of the device body 100. A drive shaft 2024 is fixedly connected to the end of the output shaft of the gasoline engine 2023 through a coupling. A drive sprocket 2025 is fixedly installed at the end of the drive shaft 2024 away from the gasoline engine 2023. A drive chain 2026 is sleeved around the drive sprocket 2025 and the driven sprocket 2022. The entire main body 100 of the device is fixedly connected to the traction end of the tractor via the connecting bracket 300 on the side of the device. The gasoline engine 2023 is started to drive the drive shaft 2024 to rotate, which in turn drives the drive sprocket 2025 to rotate synchronously. The drive sprocket 2025 drives the driven sprocket 2022 to rotate via the drive chain 2026. The driven sprocket 2022 drives the fixed rotating shaft 202 fixedly connected to it to rotate, thereby driving the tillage component 200 to rotate as a whole. At this time, the device moves forward with the tractor. The tillage blades 205 of the rotating tillage component 200 continuously insert into the soil in low-yield areas to carry out tillage and loosening operations, providing basic conditions for subsequent application of soil conditioner and soil mixing.

[0033] For further details, please refer to [link / reference]. Figure 11 As shown:

[0034] The positions of the tillage and soil-breaking blades 205 and the positioning pins 206 correspond one-to-one. Multiple annularly distributed through grooves 208 are opened through the outer wall of the movable roller sleeve 204. The through grooves 208 are located on one side of the tillage and soil-breaking blades 205. The elastic arch plate 209 passes through the inside of the through grooves 208. The diameter of the through grooves 208 is slightly larger than the diameter of the elastic arch plate 209. The elastic arch plate 209 can move inside the through grooves 208 and extend into the inside of the movable roller sleeve 204. A linkage top block 2010 is fixedly installed at the end of the elastic arch plate 209 away from the tillage and soil-breaking blades 205. Guide grooves 2021 for accommodating the sliding guide of the linkage top block 2010 are opened on the opposite surfaces of the movable roller sleeve 204 and the end cover 2011. The linkage top block 2010 is slidably installed inside the guide grooves 2021 opened on the opposite surfaces of the movable roller sleeve 204 and the end cover 2011.

[0035] Specifically, the gasoline engine 2023 is started to drive the drive shaft 2024 to rotate, which in turn drives the drive sprocket 2025 to rotate synchronously. The drive sprocket 2025 drives the driven sprocket 2022 to rotate via the drive chain 2026. The driven sprocket 2022 drives the fixed rotating shaft 202, which is fixedly connected to it, to rotate. If there are no stones obstructing the soil, the soil resistance experienced by the elastic arch plate 209 is uniform and limited, and there will be no excessive inward contraction deformation. At this time, the tension spring 2020 continuously pulls the first connecting pin 2016 to deflect, so that the end of the linkage block 207 is always engaged in the limiting groove 203 opened on the outer wall of the fixed rotating shaft 202. The movable sleeve 204 and the fixed rotating shaft 202 are in a relatively fixed synchronous rotation state, and the tillage and soil breaking blade 205 stably performs tillage and loosening operations without any additional movements.

[0036] For further details, please refer to [link / reference]. Figure 5 , Figure 6 , Figure 9 As shown:

[0037] The movable roller sleeve 204 is a cylindrical cavity structure with one side open. An end cap 2011 is fixedly installed on the open side of the movable roller sleeve 204. A limiting protrusion ring 2012 is integrally provided on the side of the end cap 2011 near the movable roller sleeve 204. The limiting protrusion ring 2012 is coaxial with the movable roller sleeve 204. A rotating collar 2013 is rotatably installed around the limiting protrusion ring 2012. Multiple deflection arms 2014 are integrally provided on the outer wall of the rotating collar 2013. The number and position of the deflection arms 2014 correspond one-to-one with the linkage block 207. A deflection hole 2015 is opened through the side of the deflection arm 2014 near the end cap 2011. The outer wall of the end of the linkage top block 2010 away from the elastic arch plate 209 abuts against the side of the deflection arm 2014.

[0038] Specifically, when the tillage and soil-breaking blade 205 comes into contact with stones buried in the soil during operation, it is rigidly obstructed by the stones, and the resistance encountered by the tillage and soil-breaking blade 205 increases instantaneously. The arched elastic arch plate 209 is compressed and contracted inward due to the resistance and slides along the groove 208 into the movable sleeve 204. At the same time, the elastic arch plate 209 drives the linkage top block 2010 to move together. When the linkage top block 2010 moves, it pushes the deflection arm 2014 and the rotating collar 2013 to rotate along the periphery of the limiting protrusion ring 2012. After the deflection arm 2014 deflects, it drives the connecting rod 2017 to deflect, which in turn drives the linkage locking block 2. 07 deflects along the junction with the positioning pin 206, causing the end of the linkage block 207 to disengage from the limiting slot 203. At this time, the movable sleeve 204 and the fixed rotating shaft 202 lose their locking limit and can rotate relative to each other. The power of the fixed rotating shaft 202 cannot be transmitted to the movable sleeve 204 and the tillage and breaking blade 205. The tillage and breaking blade 205 no longer forcibly rotates forward to cut, avoiding the tillage and breaking blade 205 from directly hitting the stones, which would cause it to deform, wear or even break. It also avoids the violent vibration of the whole device caused by rigid impact, reduces the probability of equipment damage and extends the overall service life of the device.

[0039] For further details, please refer to [link / reference]. Figure 11 As shown:

[0040] Each side of the linkage block 207 is integrally provided with a first connecting pin 2016. A connecting rod 2017 is hinged to the periphery of the first connecting pin 2016. A second connecting pin 2018 is integrally provided on the side of the connecting rod 2017 near the end cover 2011. The second connecting pin 2018 and the first connecting pin 2016 are symmetrical about the central angle of the connecting rod 2017. The second connecting pin 2018 is rotatably installed inside the deflection hole 2015 at the corresponding position. A third connecting pin is annularly distributed on the inner wall of the movable sleeve 204. The connecting pin 2019 is located between two adjacent linkage blocks 207. A tension spring 2020 is fixedly installed between the third connecting pin 2019 and the first connecting pin 2016. In the initial state, the tension spring 2020 is in a slightly stretched state, which can continuously pull the first connecting pin 2016 to deflect towards the third connecting pin 2019. This is suitable for the end of the linkage block 207 to always be tightly engaged in the limiting slot 203 when the tillage component 200 rotates as a whole.

[0041] Specifically, after the stones pass through the tillage area, the resistance experienced by the tillage blade 205 returns to normal, the compressive force on the elastic arch plate 209 disappears, and it restores its original arch shape by its own elastic force. At the same time, it drives the linkage top block 2010 to move in the opposite direction, releasing the push on the deflection arm 2014. At this time, the deflection arm 2014 returns to its original deflection angle under the tension of the tension spring 2020. One end of the tension spring 2020 is fixed to the outer wall of the rotating collar 2013 by the third connecting pin 2019, and the other end is fixedly connected to the adjacent deflection arm. On the fixed pin on the side of 2014, the tension of the tension spring 2020 always pulls the deflection arm 2014 toward the linkage top block 2010. Therefore, when the thrust of the linkage top block 2010 is released, the deflection arm 2014 will automatically return to its original position, and then drive the linkage block 207 to deflect in the opposite direction through the connecting rod 2017, so that the end of the linkage block 207 is re-engaged into the adjacent position limit slot 203, so that the movable sleeve 204 is re-engaged and fixed synchronously with the fixed rotating shaft 202, restoring power transmission, and the tillage and soil breaking blade 205 can continue to carry out normal tillage and loosening operations.

[0042] This device for soil improvement in low- and medium-yield fields in hilly areas works by first connecting the main body 100 of the device to the traction end of the tractor via the connecting bracket 300 on the side of the device. The gasoline engine 2023 is started to drive the drive shaft 2024 to rotate, which in turn drives the drive sprocket 2025 to rotate synchronously. The drive sprocket 2025 drives the driven sprocket 2022 to rotate via the drive chain 2026. The driven sprocket 2022 drives the fixed rotating shaft 202 to rotate, thereby driving the tillage component 200 to rotate as a whole. At this time, the device moves forward with the tractor. The tillage blades 205 of the rotating tillage component 200 continuously insert into the soil in low-yield areas to carry out tillage and loosening operations, providing basic conditions for subsequent application of soil conditioner and soil mixing.

[0043] When the tillage and soil-breaking blade 205 is inserted into the soil, if there are no stones obstructing the soil, the elastic arch plate will experience uniform and limited soil resistance from 209, and will not produce excessive inward contraction deformation. At this time, the tension spring 2020 will continuously pull the first connecting pin 2016 to deflect, so that the end of the linkage block 207 will always be engaged in the limiting groove 203 opened on the outer wall of the fixed rotating shaft 202. The movable sleeve 204 and the fixed rotating shaft 202 are in a relatively fixed synchronous rotation state, and the tillage and soil-breaking blade 205 will stably carry out tillage and soil loosening operations without any additional movements.

[0044] When the tillage blade 205 comes into contact with stones buried in the soil during operation, it is rigidly obstructed by the stones, and the resistance encountered by the tillage blade 205 increases instantaneously. The arched elastic plate 209 is compressed inward by the resistance and slides along the groove 208 into the movable sleeve 204. At the same time, the elastic plate 209 drives the linkage top block 2010 to move together. When the linkage top block 2010 moves, it pushes the deflection arm 2014 and the rotating collar 2013 to rotate along the periphery of the limiting protrusion ring 2012. After the deflection arm 2014 deflects, it drives the connecting rod 2017 to deflect, which in turn drives the linkage locking block 207. The entire device deflects along the junction with the positioning pin 206, causing the end of the linkage block 207 to disengage from the limiting slot 203. At this time, the movable sleeve 204 and the fixed rotating shaft 202 lose their locking limit and can rotate relative to each other. The power of the fixed rotating shaft 202 cannot be transmitted to the movable sleeve 204 and the tillage and breaking blade 205. The tillage and breaking blade 205 no longer forcibly rotates forward to cut, avoiding the tillage and breaking blade 205 from directly hitting the stones, which would cause it to deform, wear or even break. It also avoids the violent vibration of the entire device caused by rigid impact, reducing the probability of equipment damage and extending the overall service life of the device.

[0045] After the tillage blade 205 clears the stones, the elastic arch plate 209 is no longer subjected to the squeezing resistance of the stones and returns to its original position due to its own elasticity. The tension spring 2020 also pulls the connecting rod 2017 to return to its original position, so that the linkage block 207 re-engages into the limiting groove 203 of the next corresponding position, restoring the relative fixation of the movable sleeve 204 and the fixed rotating shaft 202. The tillage blade 205 resumes normal tillage operation and continues to carry out soil loosening and transformation operations in low-yield areas.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A device for soil improvement in low- and medium-yield fields in hilly areas, characterized in that: The device includes a main body (100), at least one tillage component (200) is rotatably mounted on the bottom of the main body (100), the tillage component (200) is used for soil modification, the tillage component (200) includes two mounting lugs (201) symmetrically distributed along the width direction of the main body (100), and a fixed rotating shaft (202) rotatably mounted between the two mounting lugs (201), the outer wall of the fixed rotating shaft (202) is provided with a plurality of limiting grooves (203) in an annular shape, and a movable roller sleeve (204) is rotatably mounted around the fixed rotating shaft (202). Multiple annularly distributed tillage and soil-breaking blades (205) are fixedly installed on the outer periphery of the rolling sleeve (204). Elastic arch plates (209) are fixedly installed on the tillage and soil-breaking blades (205). The elastic arch plates (209) are arched in the direction away from the tillage and soil-breaking blades (205) and the elastic arch plates (209) themselves are elastic. Multiple positioning pins (206) are arranged in annularly on the inner side wall of the movable rolling sleeve (204). A linkage block (207) is rotatably installed on the outer periphery of the positioning pins (206). The end of the linkage block (207) is engaged in the limiting groove (203).

2. The device for soil improvement of low- and medium-yield farmland in hilly areas according to claim 1, characterized in that: The limiting slots (203) are provided at equal intervals along the axial direction of the fixed rotating shaft (202).

3. The device for soil improvement in low- and medium-yield fields in hilly areas according to claim 2, characterized in that: The position of the tillage and soil breaking blade (205) corresponds one-to-one with the position of the positioning pin (206). The outer wall of the movable sleeve (204) is provided with multiple annularly distributed through grooves (208) extending into it. The through grooves (208) are located on one side of the tillage and soil breaking blade (205). The elastic arch plate (209) passes through the inside of the through groove (208) and extends into the inside of the movable sleeve (204). A linkage top block (2010) is fixedly installed at the end of the elastic arch plate (209) away from the tillage and soil breaking blade (205).

4. The device for soil improvement in low- and medium-yield fields in hilly areas according to claim 3, characterized in that: The movable roller sleeve (204) is a cylindrical cavity structure with one open side. An end cap (2011) is fixedly installed on the open side of the movable roller sleeve (204). A limiting protrusion ring (2012) is integrally provided on the side of the end cap (2011) near the movable roller sleeve (204). The limiting protrusion ring (2012) is coaxial with the movable roller sleeve (204). A rotating collar (201) is rotatably installed around the limiting protrusion ring (2012). 3) Multiple deflection arms (2014) are integrally provided on the outer wall of the rotating collar (2013). The number and position of the deflection arms (2014) correspond one-to-one with the linkage block (207). A deflection hole (2015) is provided through one side of the deflection arm (2014) near the end cover (2011). The outer wall of the end of the linkage top block (2010) away from the elastic arch plate (209) abuts against the side of the deflection arm (2014).

5. The device for soil improvement in low- and medium-yield fields in hilly areas according to claim 4, characterized in that: Each of the linkage blocks (207) has a first connecting pin (2016) integrally provided on its side. A connecting rod (2017) is hinged to the periphery of the first connecting pin (2016). A second connecting pin (2018) is integrally provided on the side of the connecting rod (2017) near the end cover (2011). The second connecting pin (2018) and the first connecting pin (2016) are symmetrical about the center angle of the connecting rod (2017). The second connecting pin (2018) is rotatably installed inside the deflection hole (2015) at the corresponding position.

6. The device for soil improvement of low- and medium-yield farmland in hilly areas according to claim 5, characterized in that: The inner wall of the movable roller sleeve (204) is provided with a third connecting pin (2019) arranged in a ring. The third connecting pin (2019) is located between two adjacent linkage blocks (207). A tension spring (2020) is fixedly installed between the third connecting pin (2019) and the first connecting pin (2016). In the initial state, the tension spring (2020) is in a slightly stretched state, which can continuously pull the first connecting pin (2016) to deflect towards the third connecting pin (2019). This is suitable for the end of the linkage block (207) to always be tightly engaged in the limiting slot (203) when the tillage component (200) rotates as a whole.

7. The device for soil improvement of low- and medium-yield farmland in hilly areas according to claim 6, characterized in that: The movable roller sleeve (204) and the end cover (2011) are provided with guide grooves (2021) for accommodating the sliding guide of the linkage top block (2010). The linkage top block (2010) is slidably installed inside the guide grooves (2021) provided on the opposite surfaces of the movable roller sleeve (204) and the end cover (2011).

8. The device for soil improvement of low- and medium-yield farmland in hilly areas according to claim 7, characterized in that: The opening diameter of the slot (208) is slightly larger than the diameter of the elastic arch (209), which is movable inside the slot (208).

9. The device for soil improvement of low- and medium-yield farmland in hilly areas according to claim 8, characterized in that: A driven sprocket (2022) is fixedly installed at the end of the fixed rotating shaft (202). A gasoline engine (2023) is fixedly installed at the top of the main body (100) of the device. A transmission shaft (2024) is fixedly connected to the end of the output shaft of the gasoline engine (2023) through a coupling. A drive sprocket (2025) is fixedly installed at the end of the transmission shaft (2024) away from the gasoline engine (2023). A transmission chain (2026) is sleeved around the drive sprocket (2025) and the driven sprocket (2022).

10. The device for soil improvement of low- and medium-yield farmland in hilly areas according to claim 9, characterized in that: A connecting bracket (300) is fixedly installed on the side of the main body (100) of the device, and the main body (100) of the device is fixedly connected to the connecting end of the tractor through the connecting bracket (300).

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