Intelligent pressing device and seeding monomer

Abstract

The invention discloses an intelligent pressing device and a seeding monomer, and relates to the technical field of seeding equipment. The intelligent pressing device comprises a pressing support, a rubber pressing wheel, an optical sensor, an image acquisition device, a controller, a pressing force adjusting system and a pressing angle adjusting system. The optical sensor is used for collecting the water content of the soil flowing back into the seed furrow, and the image collecting device is used for collecting the image of the pressed soil. According to the soil moisture content and the operation speed monitored by the optical sensor in real time, the pressing force and the pressing wheel angle are automatically adjusted, more accurate pressing intensity is applied to soil, a more suitable pressing contact area is obtained, soil adhesion is reduced, and the pressing effect required by agriculture is met. An image monitoring system is arranged to monitor the pressed soil in real time, and whether the pressing mechanism breaks down or not or whether the pressing effect is good or bad is judged.

Description

Technical Field

[0001] The present invention relates to the technical field of sowing equipment, and in particular to an intelligent suppression device and a sowing unit. Background Art

[0002] Sowing is a very important part of agricultural production. The quality of sowing is directly affected by the good or bad suppression effect during sowing operations. Different soil moisture contents require different suppression strengths. If the suppression strength is too low, the soil around the seeds will become too loose and lose moisture, affecting the germination of crop seeds. If the suppression strength is too high, the soil will be too compacted, affecting seedling emergence. In addition, the amount of soil adhered to the suppression wheel and the size of the contact area with the soil affect the rolling of the suppression wheel.

[0003] Ensuring that the pressing intensity is applied as required and the pressing wheel works efficiently is of great significance to improving the quality of sowing and increasing crop yields and incomes. However, the pressing device in the prior art only adjusts the pressing force or replaces the corresponding pressing wheel in advance according to the soil dryness and wetness conditions, the type of crop seeds, etc. before the sowing operation, and the pressing force and pressing angle cannot be changed during the operation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an intelligent pressing device and a sowing unit, so as to achieve the purpose of being able to change the pressing force and the pressing angle during the operation process.

[0005] To solve the above technical problems, according to one aspect of the present invention, an intelligent suppression device is provided, comprising a suppression bracket and a rubber suppression wheel, and also comprising an optical sensor, an image acquisition device, a controller, a suppression force adjustment system and a suppression angle adjustment system; The optical sensor is used to collect the water content of the soil flowing back into the seed trench, and the image acquisition device is used to collect the soil image after compaction is completed; The pressure regulating system comprises a pressure regulating motor, a first bevel gear, a second bevel gear, a spiral screw, a guide sleeve, a first spring, a first coupling, a first shaft and a guide sleeve fixing rod; The pressure regulating motor is fixed on the upper rear of the suppression bracket, and the pressure regulating motor is connected to the first shaft through the first coupling, the first shaft passes through the suppression bracket and is connected to the first bevel gear in the suppression bracket, the second bevel gear is vertically matched with the first bevel gear, a thread is provided in the center hole of the second bevel gear, the second bevel gear is threadedly connected to the spiral screw, the spiral screw passes through the second bevel gear, and then passes through the guide sleeve and is connected to one end of the first spring through the rotating sleeve, the other end of the first spring is connected to the rear end of the single frame, and the guide sleeve is fixed in the suppression bracket through the guide sleeve fixing rod; The suppression angle adjustment system comprises an angle adjustment motor, a motor fixing frame, a second coupling, a shaft sleeve, a second shaft, a diamond-shaped bracket, an arc-shaped slide rail and an electromagnetic slide block; The angle adjustment motor is fixed to the side of the suppression bracket through the motor fixing bracket, the angle adjustment motor is connected to the second shaft through the second coupling, the second shaft is installed on the suppression bracket, a shaft sleeve is fixedly arranged in the middle part of the second shaft, the shaft sleeve is connected to the front end of the diamond-shaped bending bracket, the electromagnetic slider is installed in the arc-shaped slide rail, the electromagnetic slider moves up and down along the arc-shaped slide rail installed on the suppression bracket, and the left and right ends of the diamond-shaped bending bracket are connected to rubber suppression wheels; The controller is respectively connected with the optical sensor, the image acquisition device, the pressure regulating motor and the angle regulating motor.

[0006] Furthermore, the optical sensor is arranged at the upper front end of the suppression bracket; and the image acquisition device is arranged at the upper rear end of the suppression bracket.

[0007] Furthermore, in the suppression angle adjustment system, fixed sleeves are respectively provided on both sides of the suppression bracket, and both ends of the second shaft are rotatably mounted in the fixed sleeves.

[0008] Furthermore, the rubber pressure wheels are respectively arranged on both sides of the pressure bracket and form a V shape, the rubber pressure wheels are installed on the rubber pressure wheel shaft, and one end of the rubber pressure wheel shaft is fixed to the diamond-shaped crooked bracket.

[0009] According to another aspect of the present invention, a sowing unit is provided, comprising a four-bar profiling mechanism, a seeding system, a furrowing system, a depth-limiting soil covering system and the above-mentioned intelligent suppression device.

[0010] Furthermore, the four-bar profiling mechanism is arranged at the front and upper part of the sowing unit; the four-bar profiling mechanism includes an upper rod, a lower rod, a second spring and a front plate, the front plate is connected to the upper rod and the lower rod by bolts in front of the four-bar profiling mechanism, the second spring is arranged between the upper rod and the lower rod, the other ends of the upper rod and the lower rod are connected to the unit frame by bolts, and the unit frame can rotate freely with the upper rod and the lower rod.

[0011] Furthermore, the seeding system is arranged in the middle of the sowing unit; the seeding system includes a seed box, a seeding device and a seed guide tube; the seeding device is fixed on the seed box bracket by bolts, the seed box bracket is connected to the unit frame, a seed box is arranged above the seeding device, the rear side of the seed box is connected to the seed box bracket, and the bottom of the seeding device is connected to the seed guide tube.

[0012] Furthermore, the furrowing system is arranged below the sowing unit; the furrowing system includes a disc knife, a disc frame, a double disc furrow opener and a first scraper plate, the disc knife is arranged in front of the furrowing system, the disc knife is installed on the unit frame through the disc frame, the double disc furrow opener is arranged below the unit frame, the bottom of the seed guide tube of the seeding system is located inside the double disc furrow opener, and the first scraper plate is installed on the unit frame and arranged on the outer side of the upper rear of the double disc furrow opener.

[0013] Furthermore, a depth limiting and covering system is arranged behind the double disc furrow opener; the depth limiting and covering system includes a depth limiting wheel, a wheel arm, a wheel axle, a second scraper plate and a sowing depth adjustment mechanism; the depth limiting wheels are respectively located at the rear position of the outer side of the double disc furrow opener, the depth limiting wheels are connected to the single body frame through the wheel arm, the second scraper plate is installed on the single body frame and arranged above and behind the depth limiting wheels, and the sowing depth adjustment mechanism is arranged inside the rear of the single body frame for adjusting the sowing depth.

[0014] Furthermore, the intelligent suppression device is arranged behind the sowing unit and connected to the unit frame through an axis.

[0015] Compared with the prior art, the intelligent suppression device and sowing unit provided by the present invention have the following technical effects: (1) During the sowing operation, the compaction pressure is automatically adjusted based on the soil moisture content and operation speed monitored in real time by the optical sensor, and a more precise compaction intensity is applied to the soil to meet the compaction requirements of agronomic requirements.

[0016] (2) The soil moisture content is monitored in real time by an optical sensor, which automatically adjusts the pressing angle to obtain a more suitable pressing contact area, reduce soil adhesion, and enable the rubber pressing wheel to work efficiently under different soil moisture contents.

[0017] (3) An image monitoring system is set up to monitor the soil after compaction in real time and feed the monitored images back to the controller. The controller analyzes the feedback images to determine whether the compaction mechanism has failed or the compaction effect is good or bad.

[0018] The present invention makes the sowing process more precise and intelligent through the above improved measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are used to provide further explanation of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 The overall structural diagram of the sowing unit of the present invention; Figure 2 It is a structural schematic diagram of the intelligent suppression device of the present invention; Figure 3 It is a structural schematic diagram of the pressure regulating system of the present invention; Figure 4 is a structural schematic diagram of the pressure regulating system of the present invention from another perspective; Figure 5 It is a structural schematic diagram of the suppression angle adjustment system of the present invention; Figure 6 It is a schematic structural diagram of the rubber pressure wheel and the diamond-shaped crutch of the present invention; Figure 7 It is a structural schematic diagram of the diamond-shaped crooked frame of the present invention; Figure 8 It is a structural schematic diagram of the four-bar linkage profiling mechanism of the present invention; Fig. 9 It is a structural schematic diagram of the seeding system of the present invention; Fig.10 It is a schematic diagram of the structure of the trenching system of the present invention; Fig.11 It is a structural schematic diagram of the depth-limited soil covering system of the present invention.

[0021] In the figure, 1-four-link profiling mechanism, 2-seedling system, 3-ditching system, 4-depth-limiting soil covering system, 5-intelligent suppression device; 11-upper rod, 12-lower rod, 13-second spring, 14-front plate; 21-seed box, 22-seed dispenser, 23-seed guide tube; 31-disc knife, 32-disc frame, 33-monobody frame, 34-double disc furrow opener, 35-first scraper board; 41-depth limiting wheel, 42-wheel arm, 43-wheel axle, 44-second scraper plate, 45-seeding depth adjusting mechanism; 51-optical sensor, 52-image acquisition device, 53-controller, 54-suppression force adjustment system, 55-suppression angle adjustment system, 56-suppression bracket, 57-rubber suppression wheel, 58-rubber suppression wheel shaft, 59-shaft; 541-pressure regulating motor, 542-first bevel gear, 543-second bevel gear, 544-screw screw, 545-guide sleeve, 546-first spring, 547-first coupling, 548-first shaft, 549-guide sleeve fixing rod, 550-rotating sleeve; 551-angle adjustment motor, 552-motor fixing bracket, 553-second coupling, 554-shaft sleeve, 555-second shaft, 556-diamond-shaped crooked bracket, 557-arc-shaped slide rail, 558-electromagnetic slider, 559-fixing sleeve, 560-arc-shaped slide rail fixing plate. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art better understand the present invention, the present invention is further clearly and completely described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the features in the embodiments and examples of this application can be combined with each other.

[0023] A typical embodiment of the present invention provides an intelligent suppression device, such as Figure 2 As shown, it includes a suppression bracket 56 and a rubber suppression wheel 57. On this basis, the intelligent suppression device also includes an optical sensor 51, an image acquisition device 52, a controller 53, a suppression force adjustment system 54 and a suppression angle adjustment system 55.

[0024] The optical sensor 51 is used to collect the water content of the soil flowing back into the seed trench, and the image acquisition device 52 is used to collect the soil image after compaction. The optical sensor can be a LD-TR04 optical sensor from Liond.

[0025] Preferably, the optical sensor 51 is disposed at the upper front end of the suppression bracket 56. No matter how the intelligent suppression device moves with the ground topography, the optical sensor 51 can sense the water content of the soil flowing back into the seed trench. The image acquisition device 52 is disposed at the upper rear end of the suppression bracket 56. The controller 51 is fixed to the single frame 33.

[0026] In this embodiment, the pressure adjustment system 54 and the pressure angle adjustment system 55 are arranged in the pressure bracket 56, and automatically adjust the pressure and the pressure angle respectively. The rubber pressure wheels 57 are respectively arranged on both sides of the pressure bracket 56 and form a V shape. The rubber pressure wheel sleeve used to install the rubber pressure wheel 57 can rotate freely on the rubber pressure wheel shaft 58.

[0027] In this embodiment, if Figure 3 , Figure 4 As shown, the pressure regulating system 54 includes a pressure regulating motor 541, a first bevel gear 542, a second bevel gear 543, a screw rod 544, a guide sleeve 545, a first spring 546, a first coupling 547, a first shaft 548 and a guide sleeve fixing rod 549.

[0028] The pressure regulating motor 541 is fixed on the upper rear part of the suppression bracket 56. The pressure regulating motor 541 is connected to the first shaft 548 through the first coupling 547. The first shaft 548 passes through the suppression bracket 56 and is connected to the first bevel gear 542 in the suppression bracket 56. The second bevel gear 543 is vertically matched with the first bevel gear 542. The center hole of the second bevel gear 543 is provided with a thread. The second bevel gear 543 is threadedly connected with the spiral screw 544. The spiral screw 544 passes through the second bevel gear 543, and then passes through the guide sleeve 545 and is connected to one end of the first spring 546 through the rotating sleeve 550. The rotating sleeve 550 includes a rotating sleeve body and a rotating sleeve shaft rotatably connected to the front end of the rotating sleeve body. Specifically, the first spring 546 is connected to the rotating sleeve shaft. After the spiral screw 544 passes through the guide sleeve 545, its front end is connected to the rotating sleeve body. The other end of the first spring 546 is connected to the rear end of the single frame 33 , and the guide sleeve 545 is fixed in the suppression bracket 56 via a guide sleeve fixing rod 549 .

[0029] In this embodiment, if Figure 5 , Figure 6 , Figure 7 As shown, the suppression angle adjustment system 55 includes an angle adjustment motor 551, a motor fixing bracket 552, a second coupling 553, a shaft sleeve 554, a second shaft 555, a diamond-shaped bracket 556, an arc-shaped slide rail 557 and an electromagnetic slider 558.

[0030] The angle adjustment motor 551 is fixed to the side of the suppression bracket 56 through the motor fixing bracket 552. The angle adjustment motor 551 is connected to the second shaft 555 through the second coupling 553. The second shaft 555 is installed on the suppression bracket 56. A shaft sleeve 554 is set in the middle part of the second shaft 555. The shaft sleeve 554 is fixedly installed on the second shaft 555 and rotates with the second shaft 555. The shaft sleeve 554 is connected to the front end of the diamond-shaped crooked bracket 556, and the rear end of the diamond-shaped crooked bracket 556 is connected to the electromagnetic slider 558.

[0031] The suppression bracket 56 is provided with an arc-shaped slide rail fixing plate 560, and the arc-shaped slide rail 557 is installed on the suppression bracket 56 through the arc-shaped slide rail fixing plate 560. The electromagnetic slider 558 is installed in the arc-shaped slide rail 557, and the electromagnetic slider 558 can move up and down along the arc-shaped slide rail 557 installed on the suppression bracket 56.

[0032] The left and right ends of the diamond-shaped bracket 556 are connected to rubber pressure wheels 57. Specifically, the rubber pressure wheels 57 are mounted on rubber pressure wheel shafts 58, and one end of the rubber pressure wheel shaft 58 is fixed to the diamond-shaped bracket 556. The rubber pressure wheels 57 at both ends of the diamond-shaped bracket 556 can change their angles relative to the ground as the diamond-shaped bracket 556 rotates.

[0033] In a relatively specific implementation, in the suppression angle adjustment system, fixing sleeves 559 are respectively provided on both sides of the suppression bracket 56 , and both ends of the second shaft 555 are rotatably mounted in the fixing sleeves 559 .

[0034] The controller 53 is respectively connected to the optical sensor 51, the image acquisition device 52, the pressure adjustment motor 541 and the angle adjustment motor 551. The controller 53 receives signals from the optical sensor 51 and the image acquisition device 52, and sends action instructions to the pressure adjustment motor 541 and the angle adjustment motor 551.

[0035] The pressure adjustment motor 541 and the angle adjustment motor 551 mentioned above are both servo motors.

[0036] Another typical embodiment of the present invention provides a sowing monomer, such as Figure 1 As shown, it includes a four-bar profiling mechanism 1, a seeding system 2, a furrowing system 3, a depth-limiting soil covering system 4 and the intelligent suppression device 5 mentioned above.

[0037] Among them, Figure 8 As shown, the four-bar linkage profiling mechanism 1 is arranged at the front upper part of the sowing unit; the four-bar linkage profiling mechanism 1 includes an upper rod 11, a lower rod 12, a second spring 13 and a front plate 14.

[0038] The front plate 14 is connected to the upper rod 11 and the lower rod 12 by bolts in front of the four-link profiling mechanism, and the front plate 14 can rotate freely with the upper rod 11 and the lower rod 12. The second spring 13 is arranged between the upper rod 11 and the lower rod 12 to pressurize the sowing unit. The other ends of the upper rod 11 and the lower rod 12 are connected to the unit frame 33 by bolts, and the unit frame 33 can rotate freely with the upper rod 11 and the lower rod 12.

[0039] Among them, Fig. 9 As shown, the seeding system 2 is arranged in the middle of the sowing unit. The seeding system 2 includes a seed box 21, a seeding device 22 and a seed guide tube 23.

[0040] The seed meter 22 is fixedly mounted on the seed box bracket by bolts, the seed box bracket is connected to the single frame 33, a seed box 21 is arranged above the seed meter 22, the side and rear of the seed box 21 are connected to the seed box bracket, and the bottom of the seed meter 22 is connected to the seed guide tube 23.

[0041] Among them, Fig.10 As shown, the furrowing system 3 is arranged below the sowing unit and includes a disc cutter 31 , a disc frame 32 , a double disc furrow opener 34 and a first scraper blade 35 .

[0042] The disc knife 31 is arranged in front of the furrowing system 3, and the disc knife 31 is installed on the single frame 33 through the disc frame 32. The double disc furrow opener 34 is arranged below the single frame 33. The bottom of the seed guide tube 23 of the seeding system 2 is located inside the double disc furrow opener 34. The first scraper plate 35 is installed on the single frame 33 and is arranged on the outer side of the upper rear of the double disc furrow opener 34.

[0043] Among them, Fig.11 As shown, the depth limiting soil covering system 4 is arranged behind the double disc furrow opener 34. The depth limiting soil covering system 4 includes a depth limiting wheel 41, a wheel arm 42, a wheel axle 43, a second scraper blade 44 and a sowing depth adjustment mechanism 45. The depth limiting wheels 41 are respectively located at the outer rear position of the double disc furrow opener 34, the depth limiting wheels 41 are connected to the single frame 33 through the wheel arm 42, the second scraper blade 44 is installed on the single frame 33 and arranged above and behind the depth limiting wheels 41, and the sowing depth adjustment mechanism 45 is arranged inside the rear of the single frame 33 for adjusting the sowing depth.

[0044] The intelligent suppression device 5 is arranged behind the sowing unit and connected to the unit frame 33 through the shaft 59 .

[0045] When the sowing operation starts, the four-bar profiling mechanism 1 pulls the single frame 33 forward, and at the same time, the second spring 13 in the four-bar profiling mechanism 1 is pressurized to ensure that the sowing single body is always close to the soil surface, the disc knife 31 draws a line on the surface of the cultivated land, and the double disc furrow opener 34 cuts the soil to open a seed furrow. The seeds are discharged from the seed box 21 through the seed meter 22 and the seed guide tube 23 one by one and fall into the opened seed furrow. The depth limiting wheel 41 behind the double disc furrow opener 34 squeezes the seed furrow and covers the soil. The sowing depth adjustment mechanism 45 controls the depth of the seed furrow. The rubber pressing wheel 57 of the intelligent pressing device 5 rotates around the axis 59 under the action of the first spring 546 to complete the pressing work.

[0046] The optical sensor 51 measures the soil in the seed furrow squeezed and covered by the depth limiting wheel 41 to obtain its moisture content. The optical sensor 51 transmits the moisture content information to the controller 53, and the controller 53 sends an adjustment instruction to the pressure adjustment motor 541 and an adjustment instruction to the angle adjustment motor according to the change of soil moisture content.

[0047] 1. Adjustment of suppression pressure When the soil moisture content increases, the pressure regulating motor 541 rotates clockwise ( Figure 4 The first bevel gear 542 drives the second bevel gear 543 to rotate counterclockwise (see above). Figure 4(viewed from the left), the second bevel gear 543 drives the screw rod 544 to move outward along the guide sleeve 545. Since the screw rod 544 is connected to the first spring 546 through the rotating sleeve 550, the screw rod 544 rotates and moves outward, so that the first spring 546 only pulls up, increasing the pressing force, and increasing the pressing strength of the rubber pressing wheel 57 on the soil.

[0048] When the soil moisture content decreases, the pressure regulating motor 541 rotates counterclockwise ( Figure 4 The first bevel gear 542 drives the second bevel gear 543 to rotate clockwise (see above). Figure 4 (Seen from the left), the second bevel gear 543 drives the screw rod 544 to move inward along the guide sleeve 545, causing the first spring 546 to retract, thereby reducing the pressing force and the pressing strength of the rubber pressing wheel 57 on the soil.

[0049] 2. Adjustment of the suppression angle When the soil moisture content increases, the angle adjustment motor 551 rotates counterclockwise and drives the second shaft 555 to rotate through the second coupling 553. The second shaft 555 drives the diamond-shaped bracket 556 to rotate upward with the shaft sleeve 554 as the center through the shaft sleeve 554. At the same time, the other end of the diamond-shaped bracket 556 moves upward along the arc-shaped slide rail 557, and the two rubber pressure wheels 57 on the left and right ends of the diamond-shaped bracket 556 rotate eccentrically upward with the shaft sleeve 554 as the rotation center. The two rubber pressure wheels 57 roll along the soil surface. Since the V-shaped angle formed by the two rubber pressure wheels 57 is from large to small from directly above to directly in front (forward direction), the middle position between directly above and directly in front is taken as the starting position. The directly above is the position when the V-shaped angle is adjusted to the maximum, and the directly in front is the position when the V-shaped angle is adjusted to the minimum. When the rubber pressure wheel 57 rotates eccentrically upward, the position of the highest point of the rubber pressure wheel 57 relative to the ground changes, and the V-shaped angle relative to the ground also changes accordingly. The rubber pressing wheel 57 rotates eccentrically upward, and the highest point of the rubber pressing wheel 57 before rotation is offset forward and downward relative to the highest point after rotation. Relative to the ground, the V-shaped angle of the highest point of the rubber pressing wheel 57 becomes larger. Therefore, the contact area between the rubber pressing wheel 57 and the soil is reduced, and the soil adhesion is reduced, so that the rubber pressing wheel 57 can work normally.

[0050] On the contrary, when the soil moisture content decreases, the angle adjustment motor 551 rotates clockwise and drives the second shaft 555 to rotate through the second coupling 553. The second shaft 555 drives the diamond-shaped bracket 556 to rotate downward with the shaft sleeve 554 as the center through the shaft sleeve 554. The other end of the diamond-shaped bracket 556 moves downward along the arc-shaped slide rail 557. The two rubber pressure wheels 57 on the left and right ends of the diamond-shaped bracket 556 rotate eccentrically downward with the shaft sleeve 554 as the rotation center. Relative to the ground, the V-shaped angle of the highest point of the rubber pressure wheel 57 becomes smaller, increasing the contact area with the soil and achieving a better pressure effect.

[0051] When the soil moisture content is stable, the electromagnetic slider 558 is energized to generate electromagnetic force, and absorbs the arc-shaped slide rail 557 to lock the position, so that the angle of the pressing wheel remains unchanged.

[0052] The image acquisition device 52 acquires the compaction condition of the soil after suppression in real time, and feeds back the acquired image to the controller 53. The controller 53 analyzes the fed-back image, and issues an alarm if it determines that the suppression device fails.

[0053] The scope of protection claimed by the present invention is not limited to the above specific embodiments. For those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent suppression device, comprising a suppression bracket (56) and a rubber suppression wheel (57), characterized in that: It also includes an optical sensor (51), an image acquisition device (52), a controller (53), a suppression force adjustment system (54) and a suppression angle adjustment system (55); The optical sensor (51) is used to collect the water content of the soil flowing back into the seed trench, and the image acquisition device (52) is used to collect an image of the soil after compaction is completed; The pressure regulating system (54) comprises a pressure regulating motor (541), a first bevel gear (542), a second bevel gear (543), a screw rod (544), a guide sleeve (545), a first spring (546), a first coupling (547), a first shaft (548) and a guide sleeve fixing rod (549); The pressure regulating motor (541) is fixed to the upper rear of the suppression bracket (56). The pressure regulating motor (541) is connected to the first shaft (548) through the first coupling (547). The first shaft (548) passes through the suppression bracket (56) and is connected to the first bevel gear (542) in the suppression bracket (56). The second bevel gear (543) is vertically matched with the first bevel gear (542). The center hole of the second bevel gear (543) is provided with a thread. The second bevel gear (543) is threadedly connected to the spiral screw (544). The spiral screw (544) passes through the second bevel gear (543), and then passes through the guide sleeve (545) and is connected to one end of the first spring (546) through the rotating sleeve (550). The other end of the first spring (546) is connected to the rear end of the single frame (33). The guide sleeve (545) is fixed to the suppression bracket (56) through the guide sleeve fixing rod (549). The suppression angle adjustment system (55) comprises an angle adjustment motor (551), a motor fixing frame (552), a second coupling (553), a shaft sleeve (554), a second shaft (555), a diamond-shaped bracket (556), an arc-shaped slide rail (557), and an electromagnetic slide block (558); The angle adjustment motor (551) is fixed to the side of the suppression bracket (56) through the motor fixing frame (552). The angle adjustment motor (551) is connected to the second shaft (555) through the second coupling (553). The second shaft (555) is installed on the suppression bracket (56). A shaft sleeve (554) is fixedly arranged in the middle part of the second shaft (555). The shaft sleeve (554) is connected to the front end of the diamond-shaped bending bracket (556). The electromagnetic slider (558) is installed in the arc-shaped slide rail (557). The electromagnetic slider (558) moves up and down along the arc-shaped slide rail (557) installed on the suppression bracket (56). The left and right ends of the diamond-shaped bending bracket (556) are connected to rubber suppression wheels (57). The controller (53) is respectively connected to the optical sensor (51), the image acquisition device (52), the pressure adjustment motor (541), and the angle adjustment motor (551).

2. The intelligent suppression device according to claim 1, characterized in that: The optical sensor (51) is arranged at the upper front end of the suppression bracket (56); and the image acquisition device (52) is arranged at the upper rear end of the suppression bracket (56).

3. The intelligent suppression device according to claim 1 or 2, characterized in that: In the suppression angle adjustment system, fixing sleeves (559) are respectively arranged on both sides of the suppression bracket (56), and both ends of the second shaft (555) are rotatably mounted in the fixing sleeves (559).

4. The intelligent suppression device according to claim 3, characterized in that: The rubber pressure wheels (57) are respectively arranged on both sides of the pressure bracket (56) and form a V shape. The rubber pressure wheels (57) are mounted on a rubber pressure wheel shaft (58), and one end of the rubber pressure wheel shaft (58) is fixed to a diamond-shaped crooked bracket (556).

5. A sowing unit, characterized in that: It comprises a four-link profiling mechanism (1), a seeding system (2), a furrowing system (3), a depth-limiting soil covering system (4), and an intelligent suppression device (5) as claimed in any one of claims 1 to 4.

6. The sowing unit according to claim 5, characterized in that: The four-bar linkage profiling mechanism (1) is arranged at the front upper part of the sowing unit; the four-bar linkage profiling mechanism (1) comprises an upper rod (11), a lower rod (12), a second spring (13) and a front plate (14); the front plate (14) is connected to the upper rod (11) and the lower rod (12) by bolts in front of the four-bar linkage profiling mechanism; the second spring (13) is arranged between the upper rod (11) and the lower rod (12); the other ends of the upper rod (11) and the lower rod (12) are connected to the unit frame (33) by bolts; the unit frame (33) and the upper rod (11) and the lower rod (12) can rotate freely.

7. The sowing unit according to claim 5 or 6, characterized in that: The seeding system (2) is arranged in the middle of the sowing unit; the seeding system (2) comprises a seed box (21), a seeding device (22) and a seed guide tube (23); the seeding device (22) is fixedly mounted on a seed box bracket by bolts, the seed box bracket is connected to the unit frame (33), a seed box (21) is arranged above the seeding device (22), the side and rear of the seed box (21) are connected to the seed box bracket, and the bottom of the seeding device (22) is connected to the seed guide tube (23).

8. The sowing unit according to claim 7, characterized in that: The furrowing system (3) is arranged below the sowing unit; the furrowing system (3) comprises a disc knife (31), a disc frame (32), a double disc furrow opener (34) and a first scraper plate (35); the disc knife (31) is arranged in front of the furrowing system (3); the disc knife (31) is mounted on the unit frame (33) through the disc frame (32); the double disc furrow opener (34) is arranged below the unit frame (33); the bottom of the seed guide tube (23) of the seeding system (2) is located inside the double disc furrow opener (34); and the first scraper plate (35) is mounted on the unit frame (33) and arranged on the outer side of the upper rear side of the double disc furrow opener (34).

9. The sowing unit according to claim 8, characterized in that: The depth limiting soil covering system (4) is arranged behind the double disc furrow opener (34); the depth limiting soil covering system (4) comprises a depth limiting wheel (41), a wheel arm (42), a wheel shaft (43), a second scraper plate (44) and a sowing depth adjustment mechanism (45); the depth limiting wheel (41) is respectively located at a rear position outside the double disc furrow opener (34); the depth limiting wheel (41) is connected to the single frame (33) through the wheel arm (42); the second scraper plate (44) is mounted on the single frame (33) and arranged above and behind the depth limiting wheel (41); and the sowing depth adjustment mechanism (45) is arranged inside the rear of the single frame (33) and is used to adjust the sowing depth.

10. The sowing unit according to claim 9, characterized in that: The intelligent suppression device (5) is arranged behind the sowing unit and is connected to the unit frame (33) via a shaft (59).

Images