A trenching machine for soybean planting

Abstract

The present invention relates to the field of agricultural machinery technology, and in particular to a furrowing machine for soybean planting; the present invention comprises a hand-held tractor head, a furrowing plow, a furrowing knife and a soil-discharging plow, and soil compacting mechanisms are rotatably installed on both sides of one end of the soil-discharging plow away from the furrowing knife, and the soil compacting mechanism comprises a compacting component and a ventilation component; in the present invention, a balance between soil compaction and air permeability is achieved through the coordinated action of the compacting component and the ventilation component, the compacting component can effectively compact the furrow wall, prevent the soil from loosening and sliding, and ensure the stability of the furrow, while the ventilation component forms multiple air holes during the compaction process through the design of the ventilation rod and the barb, thereby ensuring the air permeability of the soil and being beneficial to the respiration and healthy growth of the soybean root system. This coordinated design of compaction and ventilation not only improves the environmental quality of the soil, but also provides good conditions for the growth of soybeans.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, in particular to a furrowing machine for soybean planting. Background Art

[0002] In traditional soybean cultivation, trenching is a crucial step, directly impacting the sowing quality and subsequent growth of soybeans. However, existing trenching equipment has the following shortcomings when dealing with soils of varying hardness, especially hard soils or land containing rocks:

[0003] 1. When the trenching cutter rotates at high speed to break the soil, the reaction force of the impact will cause the handrail of the walking tractor to bounce, forcing the operator to continuously apply downward pressure to maintain the trenching depth. This not only increases the operator's labor intensity, but also makes it difficult to ensure the stability of the trenching quality.

[0004] 2. After the soil is crushed, some of it will be scattered in the ditch, which requires manual cleaning, increasing the operation process and cost;

[0005] 3. When compacting the trench wall, traditional trenching equipment tends to over-compact, resulting in poor soil permeability and affecting the respiration and growth of soybean roots. Summary of the Invention

[0006] In response to the problems existing in the prior art, the present invention provides a trencher for soybean planting, which achieves a perfect balance between soil compaction and air permeability through the synergistic effect of a compaction component and a breathable component. The compaction component can effectively compact the trench wall, prevent the soil from loosening and sliding, and ensure the stability of the trench. The breathable component forms multiple air holes during the compaction process through the design of breathable rods and barbs, thereby ensuring the air permeability of the soil and being beneficial to the respiration and healthy growth of the soybean root system. This collaborative design of compaction and air permeability not only improves the environmental quality of the soil, but also provides good conditions for the growth of soybeans, further enhancing the practical value of the trencher.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The tractor is a kind of furrowing machine for soybean planting, which comprises a hand-walk tractor head, and further comprises a furrowing plow for initially breaking the soil, a furrowing knife for crushing the soil agglomerated after the furrowing plow breaks the soil, and a soil-discharging plow for pushing the crushed soil to both sides of the furrow, wherein both sides of the soil-discharging plow away from the furrowing knife are rotatably installed with a soil compacting mechanism, and the soil compacting mechanism comprises a compacting assembly arranged on both sides of one end of the furrowing knife and a breathable assembly arranged on the compacting assembly; a protective cover is fixedly installed at the tail of the hand-walk tractor head, the furrowing knife and the soil-discharging plow are located below the protective cover, and a fixing rod is provided on the protective cover; the compacting assembly comprises an elastic connecting rod part movably inserted into the bottom end of the fixing rod and a compacting member rotatably installed at both ends of the tail of the soil-discharging plow, and one side of the compacting member is rotatably connected to the elastic connecting rod part through a ball head structure.

[0009] As an improvement of the present invention, a plug-in cavity is provided at the bottom end of the fixed rod, and the elastic connecting rod is inserted into the plug-in cavity. The elastic connecting rod includes a compression spring arranged in the plug-in cavity, a plug-in rod movably inserted into the plug-in cavity, and a connecting rod connected to the circumferential side wall of the plug-in rod through a ball head structure.

[0010] As a further improvement of the present invention, two groups of connecting rods are provided, and both ends of the two groups of connecting rods are provided with ball head structures; the two groups of connecting rods are symmetrically arranged relative to the axis of the connecting rod.

[0011] As a further improvement of the present invention, the compacting member includes a side plate rotatably mounted on the tail of the soil plow, a universal seat fixedly mounted on one side of the side plate, and a compacting roller rotatably mounted on the universal seat.

[0012] As a further improvement of the present invention, the ventilation component includes a ventilation rod provided on the circumferential side wall of the compacting roller and a barb provided on the circumferential side wall of the ventilation rod.

[0013] As a further improvement of the present invention, a plurality of plug-in holes and accommodating cavities are provided on the circumferential side wall of the compacting roller, and the accommodating cavities are connected with the plug-in holes; the air rod is matched with the plug-in holes, and one end of the air rod passes through the plug-in holes and extends into the accommodating cavity; the diameter of the accommodating cavity is larger than the diameter of the plug-in holes, and a retaining ring integrally formed with the end of the air rod is movably provided in the accommodating cavity.

[0014] As a further improvement of the present invention, a return spring is provided in the accommodating chamber, and the return spring is sleeved on the outside of the circumference of the breathable rod. One end of the return spring abuts against the retaining ring, and the other end of the return spring abuts against the accommodating chamber and is connected to one end of the inner wall of the plug-in hole.

[0015] As a further improvement of the present invention, a driving block is provided in the plug hole, and a spiral driving groove is provided at one end of the side wall of the air-permeable rod away from the circumference of the barb, and the spiral driving groove is slidably matched with the driving block.

[0016] The present invention has the following advantages:

[0017] 1. A soil compaction mechanism is installed at the tail of the soil plow. Through the synergistic effect of the compaction component and the ventilation component, a perfect balance between soil compaction and air permeability is achieved. The compaction component can effectively compact the ditch wall, prevent the soil from loosening and sliding, and ensure the stability of the gully. The ventilation component forms multiple air holes during the compaction process through the design of ventilation rods and barbs, ensuring the permeability of the soil and facilitating the respiration and healthy growth of soybean roots. This synergistic design of compaction and ventilation not only improves the environmental quality of the soil, but also provides good conditions for soybean growth, further enhancing the practical value of the trencher.

[0018] 2. The design of the furrowing plow, furrowing blade, and soil-discharging plow achieves synergistic efficiency during the trenching process. The furrowing plow first performs the initial soil breaking, effectively reducing the reaction force generated by the subsequent impact of the furrowing blade when breaking the soil. This synergistic effect reduces the bounce of the handrail position of the walking tractor head, allowing the operator to control the equipment more stably, thereby improving the overall stability of the trenching operation. At the same time, the soil-discharging plow follows closely behind, automatically discharging the broken soil to both sides of the trench, reducing the need for manual cleaning and improving operation efficiency. This close coordination of the front and back processes forms a highly efficient synergy in the trenching operation, improving overall operation efficiency.

[0019] 3. Through the coordinated work of the elastic connecting rod and the compacting member in the compaction assembly, the soil plow can fit closely to the ditch wall during operation while maintaining a stable travel trajectory, achieving a significant improvement in the linearity of trenching. The elastic pressure of the elastic connecting rod not only helps to compact the soil, but also keeps the soil plow in the center line position of the gully through its reaction force, thereby improving the linearity of trenching. This structural optimization design, combined with the overall synergy of the trenching plow, trenching knife and soil plow, jointly ensures the high-quality completion of the trenching operation and improves the overall performance of the trencher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a soybean planting trencher according to the present invention;

[0021] Figure 2 This is a schematic structural diagram of the soybean planting trencher of the present invention from another perspective;

[0022] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0023] Figure 4 It is a structural schematic diagram of the elastic connecting rod and the fixed rod of the present invention;

[0024] Figure 5 Schematic diagram of the cross-sectional structure of the compacting roller of the present invention;

[0025] Figure 6 for Figure 5 The enlarged structural diagram at B in the middle;

[0026] Figure 7 Schematic diagram of the structure of the ventilation component of the present invention;

[0027] Figure 8 This is a schematic structural diagram of the ventilation component of the present invention being located inside the compacting roller;

[0028] Figure numerals: 1. Hand tractor head; 2. Furrowing plow; 3. Furrowing knife; 4. Soil discharging plow; 5. Soil compacting mechanism; 6. Compacting assembly; 7. Ventilation assembly; 701. Ventilation rod; 702. Barb; 703. Retaining ring; 704. Return spring; 705. Spiral drive groove; 8. Protective cover; 9. Fixed rod; 901. Plug-in cavity; 10. Elastic connecting rod; 1001. Compaction spring; 1002. Plug-in rod; 1003. Connecting rod; 11. Compacting member; 1101. Side plate; 1102. Universal seat; 1103. Compacting roller; 1104. Plug-in hole; 1105. Accommodating cavity; 1106. Drive block. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] like Figures 1 to 8 As shown, a soybean planting trencher of the present invention comprises a walking tractor head 1 , and a trenching plow 2 , a trenching knife 3 and a soil-discharging plow 4 are sequentially installed at the rear of the walking tractor head 1 .

[0032] In the present invention, the furrowing plow 2 is used for initially breaking the soil, the furrowing blade 3 is used for crushing the soil agglomerated after the furrowing plow 2 breaks the soil, and the soil-discharging plow 4 is used for pushing the crushed soil to both sides of the furrow.

[0033] In the present invention, soil compacting mechanisms 5 are rotatably installed on both sides of one end of the soil plow 4 away from the furrowing knife 3. The soil compacting mechanism 5 includes compacting components 6 arranged on both sides of one end of the furrowing knife 3, and a ventilation component 7 arranged on the compacting component 6.

[0034] In the present invention, the walking tractor head 1 is used for driving forward, and the furrowing plow 2, the furrowing knife 3 and the soil-discharging plow 4 are all detachable. Among them, a transmission mechanism for driving is provided on one side of the furrowing knife 3. The walking tractor head 1, the transmission mechanism and the furrowing knife 3 are all prior art. The working principle of the prior art is that the transmission mechanism drives the furrowing knife 3 to rotate, thereby crushing the soil of the land. When crushing, the crushed soil splashes, thereby forming a pit, and then the walking tractor head 1 moves forward to form a gully. Therefore, the specific structure of the transmission mechanism will not be described in detail here. However, the above technology has the following technical problems in the furrowing process:

[0035] 1. When the soil is hard or has rocks, the trenching blade 3 rotates and breaks the soil at high speed. The reaction force of the impact will cause the handrail of the walking tractor head 1 to bounce. In order to ensure the normal depth of the trench, the operator needs to maintain a downward control pressure so that the trenching blade 3 can stably break the soil at its depth. However, if the downward pressure is controlled for a long time, the operator will feel tired.

[0036] 2. After the soil is crushed, although some of the soil can be scattered to both sides of the gully by the trenching knife 3, some of the crushed soil still falls into the opened gully, and it is necessary to manually clean the crushed soil to both sides later.

[0037] In order to reduce the reaction force of the impact of the trenching knife 3 when it breaks, a trenching plow 2 is set in front of the trenching knife 3. The trenching plow 2 is driven by the hand tractor head 1 to break the soil first. After the trenching plow 2 breaks the soil, it separates the soil and the land, and after passing over the trenching plow 2, it falls to the ground to form broken soil blocks. At this time, when the trenching knife 3 crushes the broken soil blocks one by one, the broken soil blocks are not hindered by the surrounding land and are easier to crush, so that the reaction force of the trenching knife 3 is smaller, and the soil is also easier to be crushed, and then scattered to both sides of the gully. Some of the broken soil that has not been scattered to both sides of the gully is discharged to both sides of the gully by the soil discharge plow 4 behind the trenching knife 3, thereby completing the trenching of the land.

[0038] In the present invention, when the furrowing plow 2 breaks the soil, and when the soil-discharging plow 4 discharges the broken soil in the gully, the furrowing plow 2 and the soil-discharging plow 4 are pressed downward by the soil, so that the position of the armrest of the hand tractor head 1 is limited to a certain extent, so that when the furrowing knife 3 breaks the agglomerated soil, the bounce of its reaction force and the downward pressing force of the furrowing plow 2 and the soil-discharging plow 4 by the soil are offset, so that the furrowing knife 3 is more stable when breaking stones. As a result, the furrowing operator only needs to control the direction of the hand tractor head 1, and there is no need to press downward manually to break the soil by the furrowing knife 3 to dig a trench, which greatly saves manpower.

[0039] It should be noted that when the soil-discharging plow 4 discharges the crushed soil in the gully on both sides of the gully, the crushed soil will slide down along the inner wall of the gully because it is loose, thereby affecting the stability of the gully. Therefore, a compaction component 6 is provided at the tail of the soil-discharging plow 4. The compaction component 6 moves with the soil-discharging plow 4 and can roll the inner wall of the gully after the soil is discharged, thereby compacting the loose and sliding soil to maintain the stability of the gully. However, in order to avoid excessive compaction of the soil, which leads to poor soil permeability and thus affects the growth of soybeans, multiple groups of breathable components 7 are provided on the compaction component 6, so that when the compaction component 6 compacts the loose soil, the breathable component 7 can be inserted into the soil, thereby forming multiple air holes on the compacted inner wall of the gully, thereby ensuring the respiration of the soybean root system and promoting the healthy growth of the root system.

[0040] In the present invention, a protective cover 8 is fixedly installed at the tail of the walk-behind tractor head 1, and the trenching knife 3 and the soil plow 4 are located below the protective cover 8; a fixing rod 9 is provided at one end of the protective cover 8 away from the inner wall of the walk-behind tractor head 1, and the soil plow 4 is fixed to the lower end of the fixing rod 9 by a clamp.

[0041] In the present invention, the compacting assembly 6 includes an elastic connecting rod 10 movably inserted into the bottom end of the fixed rod 9, and a compacting member 11 rotatably installed at both ends of the tail of the soil plow 4. One side of the compacting member 11 and the elastic connecting rod 10 are rotatably connected through a ball head structure.

[0042] In the present invention, two groups of compacting members 11 are provided, which are respectively located at the two ends of the tail of the soil plow 4. By rotating, they can realize the compaction of the side walls of gullies of different widths. Under the action of the elastic connecting rod 10, the two groups of compacting members 11 are pressed against the two sides of the inner wall of the gully, and the loose soil is compacted by the elastic pressure of the elastic connecting rod 10.

[0043] In the present invention, one side of the compacting member 11 and the elastic connecting rod member 10 are connected through a ball head structure, so that when the compacting member 11 adapts to grooves of different widths, its rotation can adapt to the connection between the elastic connecting rod members 10. Because the ball head structure is a prior art, its function is universal rotation, and the structure and function of the ball head structure in subsequent texts are the same, they will not be repeated here.

[0044] In the present invention, a plug-in cavity 901 is provided at the bottom end of the fixed rod 9, and the elastic connecting rod member 10 is plugged into the plug-in cavity 901. The elastic connecting rod member 10 includes a compression spring 1001 arranged in the plug-in cavity 901 and a plug-in rod 1002 movably plugged into the plug-in cavity 901 and a connecting rod 1003 connected to the lower end of the circumferential side wall of the plug-in rod 1002 through a ball head structure. There are two groups of connecting rods 1003, and both ends of the two groups of connecting rods 1003 are provided with ball head structures; the two groups of connecting rods 1003 are symmetrically arranged relative to the axis of the plug-in rod 1002, and the two groups of connecting rods 1003 are arranged at an obtuse angle. Specifically, the obtuse angle setting can prevent the two groups of connecting rods 1003 from being in a horizontal state, causing jamming, and resulting in the two groups of compacting parts 11 being unable to rotate.

[0045] In the present invention, the compaction spring 1001 is not compressed in the initial state. When the compaction assembly 6 compacts the loose soil on the side wall of the gully, the two groups of compaction parts 11 rotate toward the center line of the gully, so that the connecting rod 1003 connected by the ball head structure moves toward the center position, thereby pushing the connecting rod 1002 to move upward, thereby squeezing the compaction spring 1001. After the compaction spring 1001 is squeezed, its reaction force pushes the two groups of compaction parts 11 to press tightly against the inner wall of the gully, so that the loose soil on the inner wall of the gully is compacted, thereby stabilizing the gully; at the same time, the reaction force of the compaction spring 1001 causes the two groups of compaction parts 11 to press tightly against the inner wall of the gully, and also causes the soil plow 4 to be located at the center line of the gully, thereby improving the straight line stability of the equipment when trenching. Specifically, the direction change of the hand tractor head 1 is controlled by the position of the armrest, and the soil plow 4 is located below the protective cover 8. Figure 2 It can be seen that it is located below the armrest of the walking tractor head 1, so after the soil plow 4 is stabilized in the center by the two sets of compacting members 11, the direction of the walking tractor head 1 is further stabilized, thereby improving the stability of straight trenching.

[0046] In the present invention, the compacting member 11 includes a side plate 1101 rotatably mounted on the tail of the soil plow 4, a universal seat 1102 fixedly mounted on one side of the side plate 1101, and a compacting roller 1103 rotatably mounted on the universal seat 1102. Specifically, the side plate 1101 is provided with two groups, which are respectively located at both ends of the tail of the soil plow 4. One side of the side plate 1101 is connected to the connecting rod 1003 through a ball head structure, and the universal seat 1102 is fixedly mounted on the side of the side plate 1101 away from the connecting rod 1003. The universal seat 1102 is along the axis of the compacting roller. Multiple ones are arranged equidistantly in the direction of the axis, and through the multiple settings, the compacting roller 1103 on the universal seat 1102 can rotate; the compacting spring 1001 pushes the connecting rod 1002 downward under the reaction force, so that the two sets of connecting rods 1003 at the lower end of the circumferential side wall of the connecting rod 1002 move downward, thereby pushing the side plate 1101 connected by the ball head structure to rotate outward, so that the compacting roller 1103 on the outer wall of the side plate 1101, which is rotatably installed through the universal seat 1102, is tightly pressed against the inner wall of the gully, compacting the loose soil on the inner wall of the gully.

[0047] It should be noted that the setting of the universal seat 1102, when the universal seat 1102 is in use, in order to switch between the two states of the compaction component 6 just entering the gully and completely entering the gully, when the ditch is just opened and the soil plow 4 just enters the gully, it is necessary to manually press the handrail of the hand tractor head 1 downward so that the soil plow 4 can enter the gully. When the soil plow 4 enters the gully, if the compaction roller 1103 is not universally rotated by the universal seat 1102, but is fixed on the vertical axis, the compaction roller 1103 will scrape the inner wall of the gully when entering the gully, causing internal friction. The wall collapses, and through the setting of the universal seat 1102, when entering the gully, the compacting roller 1103 first contacts the inner wall of the gully, and then with the advancement of the equipment and the manual downward pressure, the rotation axis of the compacting roller 1103 will change accordingly, thereby ensuring that the compacting roller 1103 and the inner wall of the gully always keep the side walls in contact with each other when entering, that is, gradually enter the gully in an inclined shape. After completely entering the gully, manual downward pressure is no longer applied to it, and the compacting roller 1103 is only dragged forward at this time, and it rolls in friction with the inner wall of the gully, so that the rotation axis of the compacting roller 1103 remains vertical.

[0048] In the present invention, the ventilation component 7 includes a ventilation rod 701 arranged on the circumferential side wall of the compaction roller 1103 and a barb 702 arranged on the circumferential side wall of the ventilation rod 701. The barbs 702 are staggered and distributed in multiple groups, and the barbs 702 are arranged in a triangular shape.

[0049] In the present invention, the compacting roller 1103 and the universal seat 1102 are rotationally connected. Therefore, when the compacting roller 1103 is squeezed and fitted with the inner wall of the gully, as the hand tractor head 1 moves forward, the compacting roller 1103 rolls on the inner wall of the gully, thereby driving the air rod 701 into the soil, and the outer wall of the compacting roller 1103 compacts the loose soil. When the air rod 701 is driven into the soil, it will also enter the soil through the barb 702. It should be noted that the triangular barb 702 is a right triangle, the right angle of which is close to the outer wall of the compacting roller 1103, and the acute angle is close to the outer wall of the compacting roller 1103. The end should be connected, so that when the barb 702 is set on the air-permeable rod 701, it will not affect its normal insertion. Specifically, the sharp-angled end of the triangular barb 702 does not affect the insertion, and the soil can be loosened through the right-angled side when pulled out; wherein, the compaction roller 1103 will pull out the air-permeable rod 701 that is embedded in the soil when rolling. When it is pulled out, it will be blocked by the right-angled side of the misplaced barb 702, thereby partially bringing out the soil to a certain extent, making the soil in its hole loose, thereby being beneficial to the respiration of the soybean root system and facilitating its growth and development.

[0050] In the present invention, a plurality of plug-in holes 1104 and accommodating chambers 1105 are provided on the circumferential side wall of the compacting roller 1103, the accommodating chamber 1105 and the plug-in holes 1104 are communicated, the air rod 701 and the plug-in hole 1104 are matched and plugged in, one end of the air rod 701 passes through the plug-in hole 1104 and extends into the accommodating chamber 1105, the diameter of the accommodating chamber 1105 is larger than the diameter of the plug-in hole 1104, and a retaining ring 703 integrally formed with the end of the air rod 701 is movably provided in the accommodating chamber 1105, and the function of the retaining ring 703 is to prevent the air rod 701 from falling off.

[0051] In the present invention, a return spring 704 is provided in the accommodating chamber 1105, and the return spring 704 is sleeved on the outside of the circumference of the air-permeable rod 701. One end of the return spring 704 abuts against the retaining ring 703, and the other end of the return spring 704 abuts against one end of the inner wall of the accommodating chamber 1105 connected to the plug hole 1104. A driving block 1106 is provided in the plug hole 1104, and a spiral driving groove 705 is provided at one end of the circumferential side wall of the air-permeable rod 701 away from the hook 702. The spiral driving groove 705 and the driving block 1106 are slidably matched; in the initial state, under the action of the return spring 704, the retaining ring 703 is pushed to fit to the end of the accommodating chamber 1105 away from the plug hole 1104, and the driving block 1106 is located in the spiral driving groove 705. The driving groove 705 is close to one end of the barb 702; when the compacting roller 1103 is compacting the side wall of the gully, the air rod 701 and the barb 702 are inserted into the soil. As the compacting roller 1103 rolls, the air rod 701 and the barb 702 will be pulled out of the soil. However, when pulling out, the resistance between the air rod 701 and the barb 702 and the soil will pull the air rod 701 outward. When the air rod 701 is pulled out of the accommodating cavity 1105, the sliding matching of the spiral driving groove 705 and the driving block 1106 causes the air rod 701 to rotate during the pulling process, thereby stirring the barb 702 in the soil, further loosening the soil in the hole and improving the soil permeability.

[0052] Wherein all references to fixed connections are made above, welding is preferred. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and deformations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soybean planting trencher, comprising a walking tractor head, characterized in that: The tractor further comprises a furrowing plow for initially breaking the soil, a furrowing knife for crushing the soil agglomerated after the furrowing plow breaks the soil, and a soil-discharging plow for pushing the crushed soil to both sides of the furrow, wherein both sides of the soil-discharging plow away from the furrowing knife are rotatably mounted with a soil compacting mechanism, and the soil compacting mechanism comprises a compacting assembly arranged on both sides of one end of the furrowing knife and a ventilation assembly arranged on the compacting assembly; a protective cover is fixedly mounted on the tail of the tractor head, the furrowing knife and the soil-discharging plow are located below the protective cover, and a fixing rod is provided on the protective cover; the compacting assembly comprises an elastic connecting rod part movably plugged into the bottom end of the fixing rod and compacting members rotatably mounted at both ends of the tail of the soil-discharging plow, and one side of the compacting member is rotatably connected to the elastic connecting rod part through a ball head structure; The compacting member includes a side plate rotatably mounted on the tail of the soil discharging plow, a universal seat fixedly mounted on one side of the side plate, and a compacting roller rotatably mounted on the universal seat; The ventilation assembly includes a ventilation rod provided on the circumferential side wall of the compacting roller and a barb provided on the circumferential side wall of the ventilation rod; A plurality of plug-in holes and a receiving cavity are provided on the circumferential side wall of the compacting roller, and the receiving cavity is communicated with the plug-in hole; the ventilation rod is matched with the plug-in hole and plugged into, and one end of the ventilation rod passes through the plug-in hole and extends into the receiving cavity; the diameter of the receiving cavity is larger than the diameter of the plug-in hole, and a retaining ring integrally formed with the end of the ventilation rod is movably provided in the receiving cavity; A return spring is provided in the accommodating cavity, and the return spring is sleeved on the outer circumference of the breathable rod, one end of the return spring abuts against the retaining ring, and the other end of the return spring abuts against the accommodating cavity and is connected to one end of the inner wall of the plug hole; A driving block is arranged in the plug hole, and a spiral driving groove is opened at one end of the side wall of the air-permeable rod away from the circumference of the barb, and the spiral driving groove is slidably matched with the driving block.

2. A soybean planting trencher according to claim 1, characterized in that: A plug-in cavity is provided at the bottom end of the fixed rod, and the elastic connecting rod is inserted into the plug-in cavity. The elastic connecting rod includes a compression spring arranged in the plug-in cavity, a plug-in rod movably inserted in the plug-in cavity, and a connecting rod connected to the circumferential side wall of the plug-in rod through a ball head structure.

3. A soybean planting trencher according to claim 2, characterized in that: The connecting rods are provided in two groups, and both ends of the connecting rods in the two groups are provided with ball head structures; the two groups of connecting rods are symmetrically arranged relative to the axis of the connecting rod.

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