No-till planter

Abstract

This invention provides a no-till seeder, including a suspension assembly, multiple seeding units, a generator, a fan, and a controller. The suspension assembly includes a horizontally extending crossbeam. The multiple seeding units are respectively connected to the crossbeam. The generator is connected to the power output shaft of a traction machine and electrically connected to each seeding unit. The fan is electrically connected to the generator and has multiple sets of intake and exhaust pipes respectively connected to each seeding unit. The controller is electrically connected to each seeding unit, the generator, and the fan. Each seeding unit is connected to the crossbeam via two vertically spaced connecting frames. A telescopic pushing member is provided between the two connecting frames to apply a constant pushing force between them. The no-till seeder provided by this invention allows the seeding units to maintain a stable resistance to the ground when floating up and down using the telescopic pushing member, thereby improving the consistency of seeding depth and seeding uniformity.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and specifically relates to a no-till seeder. Background Technology

[0002] No-till seeding offers significant advantages in terms of efficiency and soil optimization compared to traditional tillage methods, and has been widely promoted in recent years. Simultaneously, with the popularization of agricultural mechanization, no-till seeders have emerged. Because no-till seeding does not involve tilling and leveling the soil, the field soil is often uneven. To improve seeding efficiency, most no-till seeders use multiple rows of seeding units on the frame for simultaneous sowing. This results in shallower seeding depths in depressions and deeper seeding depths in undulating areas.

[0003] To address the issue of inconsistent sowing depth during no-till seeding operations, existing no-till seeders typically use a movable connection between the sowing units and the frame. The weight of the sowing unit and the elasticity of the springs keep the depth-limiting wheels at the bottom constantly rolling on the ground, allowing the sowing units to adapt to the actual unevenness of the soil and thus achieve a certain degree of uniformity in sowing depth. However, this floating connection method still has the following drawbacks: First, the spring tension varies significantly between depressed and raised areas of the soil, resulting in significant differences in the rolling pressure of the depth-limiting wheels on the soil, thus maintaining inconsistent sowing depth. Second, no-till seeders require pneumatic seed extraction, using a blower driven by the output shaft of the traction machine to generate pressurized air. However, as the rolling pressure of the depth-limiting wheels on the soil changes, the power output of the traction machine also fluctuates, affecting the blower's speed and leading to unstable air pressure, which in turn affects sowing uniformity. This phenomenon is particularly noticeable when the traction machine's travel speed decreases in the field. Summary of the Invention

[0004] This invention provides a no-till seeder, which aims to improve the consistency of seeding depth and the uniformity of seeding.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a no-till seeder, comprising:

[0006] A suspension assembly for connecting the rear suspension of the tractor, the suspension assembly including a horizontally extending crossbeam;

[0007] Multiple seeding units are connected to the crossbeam and are spaced apart along the extension direction of the crossbeam;

[0008] The generator is mounted on the suspension assembly and connected to the power output shaft of the traction machine. The generator is electrically connected to each sowing unit.

[0009] The fan is mounted on the suspension assembly and electrically connected to the generator. The fan has multiple sets of intake and exhaust pipes that are connected to each seeding unit.

[0010] The controller is electrically connected to each sowing unit, generator, and fan.

[0011] Each sowing unit is connected to the crossbeam via two connecting frames spaced apart vertically. The two ends of the connecting frames are hinged to the crossbeam and the sowing unit, respectively. A telescopic jacking component is provided between the two connecting frames to apply a constant jacking force between them. The sowing unit presses against the ground under the combined action of its own weight and the constant jacking force.

[0012] In one possible implementation, one end of the telescopic jacking member is hinged to the upper connecting frame near the crossbeam, and the other end of the telescopic jacking member is hinged to the lower connecting frame near the seeding unit.

[0013] In some embodiments, the telescopic jacking member includes:

[0014] The cylinder has one end hinged to one of the connecting brackets and the other end extending toward the other connecting bracket;

[0015] The piston is slidably and sealingly connected to the cylinder along the extension direction of the cylinder, and divides the inner cavity of the cylinder into a first chamber and a second chamber.

[0016] The cylinder rod is hinged at one end to another connecting bracket, and the other end is sealed and inserted into the first chamber and slides in fit with the cylinder barrel, and the inserted end is connected to the piston.

[0017] The piston obtains different force-bearing areas on both sides of the cylinder rod, and the first and second chambers are connected to obtain the same air pressure, thereby forming a constant thrust between the cylinder rod and the cylinder.

[0018] For example, each end of the cylinder is provided with a vent hole, which is connected to the first chamber and the second chamber respectively, and the two vent holes are connected through a first air pipe, which is connected to a first switching valve; wherein, when the first switching valve is open, the first chamber and the second chamber are connected to obtain a constant thrust, and when the first switching valve is closed, the telescopic thrust member locks the two connecting brackets based on the current position of the piston.

[0019] In some embodiments, an air chamber is integrated into the outer wall of the cylinder. The air chamber is connected to the air outlet of the blower through a high-pressure air pipe. A third switch valve is provided on the high-pressure air pipe. A second air pipe is connected to both sides of the first switch valve on the first air pipe. Both second air pipes are connected to the air chamber. A second switch valve is connected to both second air pipes. A pressure relief valve is connected to the air chamber.

[0020] For example, the first switching valve, the second switching valve, the third switching valve, and the pressure relief valve are all solenoid valves and are electrically connected to the controller; a first pressure sensor is installed in the air chamber and is electrically connected to the controller.

[0021] In some embodiments, the seeding unit is provided with a limiting member located between two connecting frames; wherein, when the upper connecting frame presses down against the limiting member, the seeding unit floats down to its limit position; when the lower connecting frame presses up against the limiting member, the seeding unit floats up to its limit position.

[0022] In one possible implementation, the suspension assembly is equipped with a high-pressure steam drum, the inlet of which is connected to the outlet of the fan; the intake and exhaust pipes include an intake pipe and an exhaust pipe; and the outlet of the high-pressure steam drum is connected to the exhaust pipe.

[0023] In some embodiments, a second pressure sensor is provided inside the exhaust pipe, and a pressure regulating valve is provided at the outlet end of the high-pressure steam drum. The second pressure sensor and the pressure regulating valve are electrically connected to the controller. The second pressure sensor is used to detect the exhaust pressure of the exhaust pipe and feed it back to the controller. When the pressure detected by the second pressure sensor is lower than the set value, the controller controls the pressure regulating valve to open so as to supplement the exhaust pipe with air pressure through the high-pressure steam drum.

[0024] For example, the seeding unit includes a seed metering pipe and a seeding tray disposed in the middle of the seed metering pipe; wherein, one end of the suction pipe is connected to the air inlet of the fan, and the other end is connected to the part of the seed metering pipe located below the seeding tray; one end of the exhaust pipe is connected to the air outlet of the fan, and the other end is connected to the part of the seed metering pipe located above the seeding tray.

[0025] The beneficial effects of the no-till seeder provided by this invention are as follows: Compared with the prior art, in this no-till seeder, multiple seeding units are movably connected to the crossbeam of the suspension assembly through two connecting frames and are independent of each other. Since the two connecting frames are arranged parallel to each other, they can form a parallelogram four-bar structure with the crossbeam and the seeding unit, thereby allowing the seeding unit to float up and down with the undulation of the ground. Since the telescopic jacking component can always apply a constant jacking force to the two connecting frames during the up and down floating of the seeding unit, the seeding unit can maintain a stable resistance to the ground under the combined action of its own weight and the constant jacking force, thereby improving the consistency of seeding depth. On this basis, the power output shaft of the traction machine is connected to the generator, and the generator drives the fan to operate with electricity, which can avoid the influence of the power output change of the traction machine on the fan speed, thereby improving the air pressure stability in each intake and exhaust pipe, and thus improving the seeding uniformity. Attached Figure Description

[0026] Figure 1 A three-dimensional structural schematic diagram of the no-till seeder provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the connection structure between one of the seeding units and the crossbeam of the no-till seeder provided in an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the connection structure between the telescopic jacking component and the two connecting frames used in an embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view of the telescopic jacking component used in an embodiment of the present invention.

[0030] Figure 5 This is a schematic block diagram of the air circuit of a no-till seeder provided in an embodiment of the present invention;

[0031] Figure 6 This is a block diagram illustrating the electronic control principle of a no-till planter provided in an embodiment of the present invention.

[0032] Figure 7 This is a schematic diagram of the air path structure of the seeding unit used in an embodiment of the present invention.

[0033] In the diagram: 10. Suspension assembly; 11. Crossbeam; 20. Seeding unit; 201. Depth limiting wheel; 202. Seeding slope; 21. Limiting component; 22. Seeding pipe; 23. Seeding tray; 30. Generator; 40. Fan; 41. High-pressure air duct; 411. Third switch valve; 42. Intake pipe; 43. Exhaust pipe; 50. Controller; 60. Connecting frame; 70. Telescopic pusher; 71. Cylinder; 711. Vent hole; 712. Air chamber; 7121. Pressure relief valve; 7122. First air pressure sensor; 72. Piston; 721. First chamber; 722. Second chamber; 73. Cylinder rod; 74. First air pipe; 741. First switch valve; 742. Second air pipe; 743. Second switch valve; 80. High-pressure steam drum; 81. Second air pressure sensor; 82. Pressure regulating valve. Detailed Implementation

[0034] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Please refer to the following: Figures 1 to 7 The no-till seeder provided by the present invention will now be described. The no-till seeder includes a suspension assembly 10, multiple seeding units 20, a generator 30, a fan 40, and a controller 50. The suspension assembly 10 is used to connect the rear suspension of the traction machine, and the suspension assembly 10 includes a horizontally extending crossbeam 11. The multiple seeding units 20 are respectively connected to the crossbeam 11 and are spaced apart along the extension direction of the crossbeam 11. The generator 30 is mounted on the suspension assembly 10 and connected to the power output shaft of the traction machine. The generator 30 is electrically connected to each seeding unit 20. The fan 40 is mounted on the suspension assembly 10 and electrically connected to the generator 30. The fan 40 has multiple sets of intake and exhaust pipes 43 respectively connected to each seeding unit 20. The controller 50 is electrically connected to each seeding unit 20, the generator 30, and the fan 40.

[0037] Each sowing unit 20 is connected to the crossbeam 11 by two connecting frames 60 spaced apart vertically. The two ends of the connecting frames 60 are hinged to the crossbeam 11 and the sowing unit 20, respectively. A telescopic jacking member 70 is provided between the two connecting frames 60. The telescopic jacking member 70 is used to apply a constant jacking force between the two connecting frames 60. The sowing unit 20 presses against the ground under the combined action of its own weight and the constant jacking force.

[0038] It should be noted that no-till planters typically use tractors as tractors. In this embodiment, the suspension assembly 10 is connected to the rear suspension of the tractor to achieve lifting and lowering of the entire machine and transmission of traction force. The sowing operation of the sowing unit 20 is the same as in the prior art, that is, the seed box discharges seeds into the seed discharging pipe 22. The seeds are propelled into the sowing tray 23 by the air pressure provided by the exhaust pipe 43 of the blower 40. Seed grooves are distributed at intervals along the circumferential edge of the sowing tray 23. The seed discharging tray rotates under the drive of the drive motor (powered by the generator 30) and is driven by the blower. Under the suction action of the suction pipe 42, the seed re-enters the seed metering pipe 22 and falls into the furrow opened on the ground by the sowing slope 202. The rotation speed of the sowing disc 23 and the walking speed of the traction machine together determine the sowing spacing. It should be understood that the sowing slope 202 is equipped with depth limiting wheels 201 on both sides. The depth of the sowing slope 202 inserted into the soil is limited by the depth limiting wheels 201 rolling the ground. In other words, as long as the depth limiting wheels 201 can always maintain a stable rolling pressure with the ground, the sowing depth can be consistent.

[0039] It should be understood that in this embodiment, the two connecting frames 60 are arranged parallel to each other vertically, forming a parallelogram linkage structure between the crossbeam 11 and the sowing unit 20. The telescopic jacking member 70 is connected to the two connecting frames 60 respectively and outputs a constant jacking force. Under the action of the constant jacking force, the two connecting frames 60 always obtain the power to swing downward (centered on the hinge point on the crossbeam 11), so that the sowing unit 20 (the depth limiting wheel 201) is stably pressed against the ground. Of course, due to the change in the swing angle of the connecting frame 60, the constant jacking force is converted into the magnitude of the downward swing driving force of the connecting frame 60, so the downward force on the sowing unit 20 is not absolutely consistent. However, since the swing amplitude of the connecting frame 60 is not too large (normally around 15°), the difference in the downward swing driving force on the connecting frame 60 at different angles can be ignored.

[0040] Compared with the prior art, the no-till seeder provided in this embodiment has multiple seeding units 20 that are movably connected to the crossbeam 11 of the suspension assembly 10 through two connecting frames 60 and are independent of each other. Since the two connecting frames 60 are arranged vertically and horizontally to form a parallelogram four-bar structure with the crossbeam 11 and the seeding unit 20, the seeding unit 20 can float up and down with the undulation of the ground. Since the telescopic jacking member 70 can always apply a constant jacking force to the two connecting frames 60 during the up and down floating of the seeding unit 20, the seeding unit 20 can maintain a stable pressure on the ground under the combined action of its own weight and the constant jacking force, thereby improving the consistency of the seeding depth. On this basis, the power output shaft of the traction machine is connected to the generator 30, and the generator 30 drives the fan 40 to operate electrically. This can avoid the influence of the power output change of the traction machine on the speed of the fan 40, thereby improving the air pressure stability in each intake and exhaust pipe 43, and thus improving the seeding uniformity.

[0041] In some embodiments, see Figure 2 and Figure 3 One end of the telescopic pusher 70 is hinged to the upper connecting frame 60 near the crossbeam 11, and the other end of the telescopic pusher 70 is hinged to the lower connecting frame 60 near the seeding unit 20.

[0042] The upper end of the telescopic pusher 70 is hinged to the upper connecting frame 60 near the crossbeam 11, and the lower end is hinged to another connecting frame near the sowing unit 20. When the distance between the two hinge points increases, the connecting frame 60 will swing downward. Therefore, the telescopic pusher 70 outputs a constant pushing force, so that the sowing unit 20 obtains a stable downward force. On this basis, the two ends of the telescopic pusher 70 are close to the crossbeam 11 and the sowing unit 20, respectively. On the one hand, this ensures the length of the telescopic pusher 70 and makes full use of the space between the two connecting frames 60 to ensure sufficient power for the telescopic pusher 70. On the other hand, it reduces the swing amplitude of the telescopic pusher 70 when the connecting frame 60 swings, thereby reducing the impact of the downward driving force on the connecting frame 60 caused by the angle change of the telescopic pusher 70. This improves the stress stability of the sowing unit 20 and ensures the sowing depth is consistent to the greatest extent.

[0043] As one specific embodiment of the telescopic jacking member 70 described above, please refer to Figure 4The telescopic thrust member 70 includes a cylinder 71, a piston 72, and a cylinder rod 73. One end of the cylinder 71 is hinged to one of the connecting frames 60, and the other end extends toward the other connecting frame 60. The piston 72 is sealed and slidably connected to the cylinder 71 along the extension direction of the cylinder 71, and divides the inner cavity of the cylinder 71 into a first chamber 721 and a second chamber 722. One end of the cylinder rod 73 is hinged to the other connecting frame 60, and the other end is sealed and inserted into the first chamber 721 and slidably engaged with the cylinder 71, and the inserted end is connected to the piston 72. The piston 72 obtains different force-bearing areas on both sides of the cylinder rod 73, and the first chamber 721 and the second chamber 722 are connected to obtain the same air pressure, thereby forming a constant thrust force between the cylinder rod 73 and the cylinder 71.

[0044] According to the pressure calculation formula F = P·S, where F is the air pressure thrust received by one side of piston 72; P is the air pressure in the first chamber 721 and the second chamber 722, i.e., pressure; and S is the force-bearing area of ​​piston 72, i.e., the area of ​​piston 72's end face that can contact the gas. For the first chamber 721, the force-bearing area of ​​piston 72 is the end face area S of piston 72 minus the cross-sectional area S0 of cylinder rod 73. For the second chamber 722, the force-bearing area of ​​piston 72 is the end face area S of piston 72. Therefore, when the first chamber 721 and the second chamber 722 are connected, the air pressure in the first chamber 721 and the second chamber 722 can remain balanced. At this time, the difference in air pressure thrust received by both sides of piston 72 is the product of air pressure and cross-sectional area of ​​cylinder rod 73, i.e., constant thrust = P·S0. Based on this constant thrust, piston 72 moves towards the first chamber 721, thereby causing cylinder rod 73 to extend.

[0045] As can be seen from the calculation principle of constant jacking force, the magnitude of constant jacking force is directly proportional to air pressure, and remains constant under constant air pressure. When the sowing unit 20 moves from a flat or raised surface to a recessed area, the sowing unit 20 loses the support force from the ground. At this time, the connecting frame 60 swings downward under the combined action of the weight of the sowing unit 20 and the constant jacking force, so that the sowing unit 20 re-establishes stable contact with the ground with a stable resistance force. When the sowing unit 20 moves from a flat or recessed surface to a raised area, the support force of the ground on the sowing unit 20 increases to exceed the sum of the weight of the sowing unit 20 and the constant jacking force. Therefore, the connecting frame 60 is subjected to the force of the sowing unit 20... The cylinder rod 73 retracts into the cylinder 71 under the force of the upward movement. During the retraction process, the gas in the second chamber 722 can flow into the first chamber 721, so the constant thrust remains unchanged until the sum of the weight of the sowing unit 20 and the constant thrust is balanced with the ground support force. At this time, the connecting frame 60 stops swinging upward, so that the sowing unit 20 obtains the same downward force as when passing through a flat ground or a ground depression area, thereby ensuring that the sowing depth of the sowing unit 20 is consistent when passing through a flat ground or a ground depression or convex area.

[0046] Specifically, in this embodiment, each end of the cylinder 71 is provided with a vent hole 711. The two vent holes 711 are respectively connected to the first chamber 721 and the second chamber 722, and the two vent holes 711 are connected through a first air pipe 74. A first switching valve 741 is connected to the first air pipe 74. When the first switching valve 741 is open, the first chamber 721 and the second chamber 722 are connected to obtain a constant thrust. When the first switching valve 741 is closed, the telescopic thrust member 70 locks the two connecting brackets 60 based on the current position of the piston 72.

[0047] During sowing operations, simply opening each of the first switch valves 741 allows each sowing unit 20 to float independently with the undulations of the ground, thereby improving the consistency of sowing depth. When sowing stops, simply closing each of the first switch valves 741 cuts off the connection between the first chamber 721 and the second chamber 722. At this time, both the first chamber 721 and the second chamber 722 form sealed chambers, so the piston 72 cannot slide inside the cylinder 71. Thus, the swing angle of the two connecting frames 60 can be locked by using the telescopic pusher 70, so that each sowing unit 20 can rise and fall synchronously with the rise and fall of the suspension assembly. This avoids damage caused by the up-and-down swinging and collision of each sowing unit 20 due to road bumps when the tractor drives the no-till seeder during non-operational conditions.

[0048] For some possible implementations, please refer to [link / reference]. Figure 4 and Figure 5The outer wall of the cylinder 71 is integrated with an air chamber 712. The air chamber 712 is connected to the air outlet of the blower 40 through a high-pressure air pipe 41. A third switch valve 411 is provided on the high-pressure air pipe 41. A second air pipe 742 is connected to both sides of the first switch valve 741 on the first air pipe 74. Both second air pipes 742 are connected to the air chamber 712. A second switch valve 743 is connected to both second air pipes 742. A pressure relief valve 7121 is connected to the air chamber 712.

[0049] As the space occupied by the cylinder rod 73 decreases when it extends outward from the cylinder barrel 71, the total space of the first chamber 721 and the second chamber 722 increases, resulting in a certain degree of decrease in air pressure. Similarly, as the cylinder rod 73 retracts into the cylinder barrel 71, its space occupied increases, resulting in a decrease in the total space of the first chamber 721 and the second chamber 722, resulting in a certain degree of increase in air pressure. Since the magnitude of the constant thrust is directly proportional to the magnitude of the air pressure, changes in air pressure will cause changes in the constant thrust. In view of this, by setting an air chamber 712 connected to the first air pipe 74 on the outer wall of the cylinder barrel 71, the total amount of gas in the air chamber 712, the first chamber 721, and the second chamber 722 is used as effective gas, reducing the impact of the extension and retraction of the cylinder rod 73 on the air pressure, thereby reducing the fluctuation of the constant thrust.

[0050] Based on the above, when sowing is performed, opening the two second switch valves 743 connects the air chamber 712 with the first chamber 721 and the second chamber 722. The first and second chambers 721 and 722 can also form another connecting channel based on the open state of the first switch valve 741, thereby improving the gas flow efficiency between the first and second chambers 721 and thus increasing response sensitivity. The air pressure can be regulated by the cooperation of the third switch valve 411 and the pressure relief valve 7121, thereby achieving air pressure stability. When sowing is stopped, simply closing the two second switch valves 743 cuts off the connection between the air chamber 712 and the first and second chambers 721 and 722. Simultaneously closing the first switch valve 741 cuts off the connecting channel between the first and second chambers 721 and 722, thereby locking the relative position of the cylinder rod 73 and the cylinder barrel 71, preventing the sowing unit 20 from floating and bumping up and down in the non-working state and colliding with the suspension assembly.

[0051] It should be noted that, see Figure 6 In this embodiment, the first switching valve 741, the second switching valve 743, the third switching valve 411, and the pressure relief valve 7121 are all solenoid valves and are electrically connected to the controller 50 respectively; the air chamber 712 is provided with a first air pressure sensor 7122, which is electrically connected to the controller 50.

[0052] Automatic control is achieved using a solenoid valve in conjunction with the controller 50. Specifically, during the sowing operation, the first switching valve 741 and the second switching valve 743 are opened. The first air pressure sensor 7122 detects the air pressure in the air chamber 712 in real time. Since the air chamber 712 is connected to the first chamber 721 and the second chamber 722 at this time, when the cylinder rod 73 extends, the detection value of the first air pressure sensor 7122 decreases and is fed back to the controller 50. The controller 50 then controls the third switching valve 411 to open, and the fan 40 replenishes the air chamber 712 with gas until the detection value of the first air pressure sensor 7122 returns to the set value (which can be a range), and then closes the valve. The third switching valve 411; when the cylinder rod 73 retracts, the detection value of the first air pressure sensor 7122 increases and is fed back to the controller 50. The controller 50 then controls the pressure relief valve 7121 to open and release pressure until the detection value of the first air pressure sensor 7122 returns to the set value and then the pressure relief valve 7121 closes. It should be understood that the opening and closing processes of the above-mentioned switching valves and pressure relief valve 7121 are instantaneous. The air pressure is precisely controlled by the real-time detection of the air pressure value by the first air pressure sensor 7122, thereby avoiding fluctuations in the constant thrust due to the extension and retraction of the cylinder rod 73, and thus improving the consistency of the sowing depth of the sowing unit 20 when it fluctuates up and down due to terrain undulations.

[0053] In some embodiments, please refer to Figure 3 The sowing unit 20 is equipped with a limiting member 21 located between two connecting frames 60. When the upper connecting frame 60 presses down against the limiting member 21, the sowing unit 20 floats down to its limit position; when the lower connecting frame 60 presses up against the limiting member 21, the sowing unit 20 floats up to its limit position. By setting the limiting member 21, it can prevent the sowing unit 20 from floating up and down too much, thus avoiding collisions and interference with surrounding components and causing damage. On the other hand, when the sowing unit 20 floats down to its limit position, the limiting member 21 provides support and prevents the telescopic pushing member 70 from bearing excessive impact force, thereby improving the service life of the telescopic pushing member 70.

[0054] Furthermore, the limiting member 21 is provided with a locking pin (not shown in the figure). When the sowing unit 20 floats down to the limit position, the locking pin is inserted into the connecting frame 60 above, thereby fixing the sowing unit 20 to the connecting frame 60 and completely preventing the telescopic pushing member 70 from being damaged by impact force when not in sowing operation.

[0055] For some possible implementations, please refer to [link / reference]. Figure 1 and Figure 5 The suspension assembly 10 is equipped with a high-pressure steam drum 80, the air inlet of the high-pressure steam drum 80 is connected to the air outlet of the blower 40; the intake and exhaust pipe 43 includes an intake pipe 42 and an exhaust pipe 43; the air outlet of the high-pressure steam drum 80 is connected to the exhaust pipe 43.

[0056] By setting up a high-pressure steam drum 80 to store high-pressure gas, the controller 50 controls the electromagnetic reversing valve to switch the airflow channel during non-sowing operations. At this time, the blower 40 injects high-pressure gas into the high-pressure steam drum 80. During the sowing operation, when the blower 40's output air pressure drops due to insufficient power from the generator 30, the high-pressure steam drum 80 can be used to supplement the air pressure in the exhaust pipe 43, thereby ensuring sufficient air pressure in the exhaust pipe 43 and preventing the seeds from failing to enter the sowing tray 23 due to insufficient air pressure, thus ensuring the stability and uniformity of the sowing operation.

[0057] Specifically, see Figure 6 In this embodiment, a second pressure sensor 81 is provided inside the exhaust pipe 43, and a pressure regulating valve 82 is provided at the outlet end of the high-pressure steam drum 80. The second pressure sensor 81 and the pressure regulating valve 82 are electrically connected to the controller 50. The second pressure sensor 81 is used to detect the exhaust pressure of the exhaust pipe 43 and feed it back to the controller 50. When the pressure detected by the second pressure sensor 81 is lower than the set value, the controller 50 controls the pressure regulating valve 82 to open so as to supplement the air pressure in the exhaust pipe 43 through the high-pressure steam drum 80.

[0058] The second air pressure sensor 81 is used to detect the air pressure value in the exhaust pipe 43 in real time and feed it back to the controller 50. When the air pressure in the exhaust pipe 43 drops, the controller 50 controls the pressure regulating valve 82 to open so that the high-pressure steam drum 80 can supplement the air pressure in the exhaust pipe 43. It should be understood that the opening degree of the pressure regulating valve 82 is inversely proportional to the detection value of the second air pressure sensor 81. That is, the lower the air pressure in the exhaust pipe 43, the larger the opening degree of the pressure regulating valve 82, and the more gas the high-pressure steam drum 80 can supplement into the exhaust pipe 43. This can eliminate the situation where the power output of the generator 30 changes due to the change of the power output of the traction machine, which in turn causes the driving force of the fan 40 to change, resulting in unstable air pressure. This ensures the stable operation of the sowing unit 20, thereby improving the stability and uniformity of sowing.

[0059] Optionally, see Figures 5 to 7 In this embodiment, the sowing unit 20 includes a seed metering pipe 22 and a sowing tray 23 located in the middle of the seed metering pipe 22; wherein, one end of the suction pipe 42 is connected to the air inlet of the fan 40, and the other end is connected to the part of the seed metering pipe 22 located below the sowing tray 23; one end of the exhaust pipe 43 is connected to the air outlet of the fan 40, and the other end is connected to the part of the seed metering pipe 22 located above the sowing tray 23.

[0060] Seeding tray 23 has seed grooves spaced around its circumference. A drive motor is connected to the seeding tray 23. The drive motor is electrically connected to the generator 30 and the controller 50. The rotation of the seeding tray 23 by the drive motor can improve the stability of the rotation speed of the seeding tray 23. At the same time, it can also be correlated with the traveling speed of the traction machine based on the controller 50. That is, the speed sensor detects the traveling speed of the seeding machine and feeds it back to the controller 50. The controller 50 controls the speed of the drive motor according to the traveling speed of the seeding machine, thereby achieving precise control of the seeding spacing and improving the uniformity of seeding.

[0061] During sowing, the exhaust pipe 43 provides positive pressure airflow to the upper part of the seed metering pipe 22, causing the seeds falling into the seed metering pipe 22 to fall into the seed trough. When the sowing tray 23 rotates until the seed trough is aligned with the lower half of the seed metering pipe 22, the suction pipe 42 uses negative pressure to remove the seeds from the seed trough. Based on stable suction and exhaust pressure, it is ensured that seeds can fall into each seed trough and fall off smoothly, thereby ensuring sowing quality and sowing uniformity.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A no-till planter, characterized in that, include: A suspension assembly for connecting the rear suspension of a tractor, the suspension assembly including a horizontally extending crossbeam; Multiple seeding units are connected to the crossbeam and are spaced apart along the extension direction of the crossbeam; A generator is mounted on the suspension assembly and connected to the power output shaft of the traction machine. The generator is electrically connected to each of the seeding units. A fan is mounted on the suspension assembly and electrically connected to the generator. The fan has multiple sets of intake and exhaust pipes that are respectively connected to each of the seeding units. The controller is electrically connected to each of the seeding units, the generator, and the fan. Each of the sowing units is connected to the crossbeam via two connecting frames spaced apart vertically, and the two ends of the connecting frames are respectively hinged to the crossbeam and the sowing unit. A telescopic jacking member is provided between the two connecting frames, and the telescopic jacking member is used to apply a constant jacking force between the two connecting frames. The sowing unit presses against the ground under the combined action of its own weight and the constant jacking force. One end of the telescopic jacking member is hinged to the upper connecting frame near the crossbeam, and the other end of the telescopic jacking member is hinged to the lower connecting frame near the sowing unit. The telescopic jacking component includes: The cylinder has one end hinged to one of the connecting frames and the other end extending toward the other connecting frame; The piston is slidably and sealingly connected to the cylinder along the extension direction of the cylinder, and divides the inner cavity of the cylinder into a first chamber and a second chamber. The cylinder rod has one end hinged to another of the connecting brackets, and the other end is sealed and inserted into the first chamber and slidably engaged with the cylinder barrel, with the inserted end connected to the piston. The piston obtains different force-bearing areas on both sides of the cylinder rod, and the first chamber and the second chamber are connected to obtain the same air pressure, thereby forming the constant thrust between the cylinder rod and the cylinder. Both ends of the cylinder are provided with a vent hole, which is connected to the first chamber and the second chamber respectively, and the two vent holes are connected through a first air pipe, which is connected to a first switching valve; wherein, when the first switching valve is open, the first chamber and the second chamber are connected to obtain the constant thrust, and when the first switching valve is closed, the telescopic thrust member locks the two connecting brackets based on the current position of the piston; An air chamber is integrated into the outer wall of the cylinder. The air chamber is connected to the air outlet of the blower through a high-pressure air pipe. A third switch valve is provided on the high-pressure air pipe. A second air pipe is connected to both sides of the first switch valve on the first air pipe. Both second air pipes are connected to the air chamber. A second switch valve is connected to both second air pipes. A pressure relief valve is connected to the air chamber. The first switching valve, the second switching valve, the third switching valve, and the pressure relief valve are all solenoid valves and are electrically connected to the controller respectively; a first pressure sensor is provided in the air chamber, and the first pressure sensor is electrically connected to the controller.

2. The no-till seeder as described in claim 1, characterized in that, The sowing unit is provided with a limiting member, which is located between the two connecting frames; wherein, when the upper connecting frame presses down against the limiting member, the sowing unit floats down to its limit position; when the lower connecting frame presses up against the limiting member, the sowing unit floats up to its limit position.

3. The no-till seeder as described in any one of claims 1-2, characterized in that, The suspension assembly is equipped with a high-pressure steam drum, the inlet of which is connected to the outlet of the fan; the intake and exhaust pipes include an intake pipe and an exhaust pipe; the outlet of the high-pressure steam drum is connected to the exhaust pipe.

4. The no-till seeder as described in claim 3, characterized in that, The exhaust pipe is equipped with a second pressure sensor, and the outlet of the high-pressure steam drum is equipped with a pressure regulating valve. The second pressure sensor and the pressure regulating valve are electrically connected to the controller. The second pressure sensor is used to detect the exhaust pressure of the exhaust pipe and feed it back to the controller. When the pressure detected by the second pressure sensor is lower than the set value, the controller controls the pressure regulating valve to open so as to supplement the exhaust pipe with air pressure through the high-pressure steam drum.

5. The no-till seeder as described in claim 3, characterized in that, The sowing unit includes a seed metering pipe and a sowing tray located in the middle of the seed metering pipe; wherein, one end of the air intake pipe is connected to the air inlet of the fan, and the other end is connected to the part of the seed metering pipe located below the sowing tray; one end of the exhaust pipe is connected to the air outlet of the fan, and the other end is connected to the part of the seed metering pipe located above the sowing tray.

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