A seeder with controllable seeding stroke and modification method thereof

Abstract

The present invention relates to the technical field of seed drills, and discloses a seed drill with controllable seeding stroke and a modification method, including a frame, a furrowing device, a seeding unit and a pressure wheel unit, wherein the seeding unit includes: a seeding box, a transmission shaft and a control member, the control member is arranged at the discharge port of the seeding box, the control member includes a first control shaft and a control panel, a notch is arranged on the control panel, the pressure wheel assembly includes a pressure wheel, a first driving wheel and a fixed frame, the first driving wheel is coupled to the pressure wheel, and the first driving wheel is coupled to the transmission shaft to transmit power to the transmission shaft first, and then to the first control shaft, so as to drive the control panel to rotate and realize the opening and closing of the discharge port of the seeding box. Therefore, the present invention utilizes the pressure wheel to not only realize the effect of pressing and covering the seeding groove area, but also can be converted into a power source and a spacing measurement standard for controlling the seeding unit to plant, so as to accurately realize the arrangement effect of seeds with equal row spacing, which is conducive to the standardized planting of crops.

Description

Technical Field

[0001] The present invention relates to the technical field of seed drills, and more particularly to a seed drill with controllable seeding stroke and a modification method thereof. Background Art

[0002] The seeder that integrates multiple functions such as stubble removal, sowing, and fertilization is the development direction of modern seeders. It not only reduces operating costs and avoids the problem of air pollution caused by burning straw, but also avoids the problem of destroying soil organic matter and reducing soil quality due to burning. Since it can be sown directly after harvesting by the harvester, it conforms to the agricultural operation characteristics of "struggling for time in spring and competing for time in summer", and solves the key problem of agricultural production of rushing to harvest and planting. The crushed straw is transformed into high-quality organic fertilizer through the natural surface temperature and rainwater, which not only has the effect of retaining moisture, preventing compaction after rain, and reducing surface runoff, but also can greatly improve soil structure and achieve increased agricultural production and efficiency.

[0003] If crops want to achieve high yields, sowing density is crucial. Once the density is not properly controlled, the yield will be greatly affected. Different crops and even different varieties of the same crop have different requirements for sowing density. Taking the market variety of corn as an example, densely planted corn varieties cannot be sparsely planted. On the contrary, sparsely planted varieties cannot be sown too densely. Moreover, if the ears of short-stemmed and densely planted varieties are sown too sparsely, they will not grow large, and the yield will naturally not increase. Similarly, if sparsely planted varieties are sown too densely, it will cause field shading, which may have a greater impact on yield. Therefore, it is very important to plant corn in a reasonable density.

[0004] Due to the limitations of the power and driving method of the seeder, most of the current high-precision seeders use remote sensing technology to perform travel positioning on the seeder, which can accurately control the seeding interval to achieve equal-spacing sowing. However, this sowing method is costly and suitable for large-scale combined mechanized operations, but cannot be applied to small and medium-sized farmers. Currently, small and medium-sized farmers still mainly use lower-cost seeders. The principle is generally to drive the seed box to sow through the rotation of the ground wheel. In this way, the driving speed and sowing amount cannot be accurately matched in real time. The faster the driving speed, the larger the spacing, and the slower the driving speed, the smaller the spacing. It is greatly affected by the driver's skills, resulting in uncontrollable row spacing between sown seeds and very low precision, which is not conducive to standardized planting of crops and it is difficult to ensure ideal crop yields. Summary of the invention

[0005] The purpose of the present invention is to provide a seeder with controllable seeding stroke and a modification method in order to solve the above problems.

[0006] The present invention provides a seeding machine with controllable seeding stroke, comprising:

[0007] frame;

[0008] A ditching device, the ditching device is connected to the front end of the frame;

[0009] A sowing unit, wherein a plurality of the sowing units are arranged on the frame, and the sowing unit comprises: a sowing box, a transmission shaft and a control member, wherein the control member is arranged at the discharge port of the sowing box, and the control member comprises a first control shaft and a control board, wherein one side of the first control shaft is coupled to the transmission shaft, and the other side is coupled to the control board, and a notch is arranged on the control board;

[0010] A pressure wheel unit, a plurality of the pressure wheel units are connected to the rear end of the frame, the pressure wheel assembly comprises: a pressure wheel, a first driving wheel and a fixed frame, the pressure wheel is rotatably connected to one end of the fixed frame, and the other end of the fixed frame is sleeved on the transmission shaft; wherein, the first driving wheel is coupled to the pressure wheel, and the first driving wheel is coupled to the transmission shaft to first transmit power to the transmission shaft, and then transmit power to the first control shaft to drive the control board to rotate, thereby realizing the opening and closing of the discharge port of the seeding box.

[0011] According to some embodiments of the present invention, the control board is disposed in the seeding box, and the control component also includes a second control shaft, one end of which is connected to the control board, and the other end of the second control shaft passes through the box body of the seeding box and is coupled to the first control shaft.

[0012] According to some embodiments of the present invention, the control panel is vertically inclined in the seeding box, and the discharge port of the seeding box is arranged on a side close to the upper end of the control member.

[0013] According to some embodiments of the present invention, a scraper is further provided on the inner side wall of the seeding box, and a working portion of the scraper is adjacent to the upper plate surface of the control plate and covers the notch area.

[0014] According to some embodiments of the present invention, a first driven wheel and a second driving wheel are provided on the transmission shaft, a first transmission member is provided between the first driving wheel and the first driven wheel, and a second transmission member is provided between the second driving wheel and the control member.

[0015] According to some embodiments of the present invention, the first transmission member is a transmission belt or a transmission chain, and / or the second transmission member is a transmission belt or a transmission chain.

[0016] According to some embodiments of the present invention, it also includes: a connecting seat, a vertical rod and a cross rod, the connecting seat is fixed on the frame, one end of the vertical rod is hinged to the fixed frame, and the other end is slidably connected to the cross rod, the two ends of the cross rod are rotatably arranged on the connecting seat, and a spring is also arranged between the connecting seat and the fixed frame, and the spring is sleeved on the vertical rod.

[0017] According to some embodiments of the present invention, it also includes: an angle sensor, a telescopic device and a central processing unit, wherein the angle sensor is connected to one end of the cross bar to obtain the rotation angle change of the cross bar; the telescopic device is arranged on the transmission shaft, the telescopic device includes a telescopic motor and a telescopic rod, the telescopic rod is connected to the telescopic motor, the telescopic rod is embedded between the first driven wheel and the transmission shaft, the angle sensor is electrically connected to the central processing unit, the telescopic motor is electrically connected to the central processing unit, and the transmission shafts of adjacent sowing units are rigidly connected.

[0018] According to some embodiments of the present invention, a ball is embedded in the front end of the telescopic rod.

[0019] The present invention also provides a method for modifying a seeder with controllable seeding stroke, comprising the following steps:

[0020] S1, coaxially installing a first driving wheel on one side of the pressing wheel;

[0021] S2. According to the structural layout of the frame, a transmission shaft is added to the frame, and a first transmission member is sleeved on the transmission shaft and the first driving wheel;

[0022] S3, a control shaft and a control board with a notch are installed at the discharge port of the seeding box, and the control board is coupled to the control shaft, and a second transmission member is sleeved on the control shaft and the transmission shaft.

[0023] The beneficial effects of the present invention are:

[0024] The present invention utilizes the pressure wheel not only to achieve the effect of pressing the sowing groove area, but also to convert it into a power source and spacing measurement standard for controlling the sowing of the sowing unit, so as to accurately achieve the arrangement effect of seeds with equal row spacing. This can eliminate the influence of vehicle speed or driving technology on row spacing, is conducive to the standardized planting of crops, and ensures crop yields.

[0025] The method for realizing equal-interval sowing by the present invention is simple and low-cost, and is conducive to modification and use on old seeders, thereby improving the sowing effect of the old seeders. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the seed drill of the present invention;

[0027] Figure 2 is a side view of the planter of the present invention;

[0028] Figure 3 is a schematic diagram of a pressing wheel unit of the present invention;

[0029] Figure 4 is a schematic diagram of a sowing unit of the present invention;

[0030] Figure 5 is a schematic diagram of the position of the angle sensor of the present invention;

[0031] Figure 6 It is a schematic diagram of the telescopic device structure of the present invention.

[0032] In the figure: 100, seeder; 1, frame; 2, furrowing device; 3, sowing unit; 31, sowing box; 32, transmission shaft; 33, control member; 331, first control shaft; 332, control board; 333, notch; 334, second control shaft; 335, scraper; 4, pressure wheel unit; 41, pressure wheel; 42, first driving wheel; 43, fixing frame; 51, first driven wheel; 52, second driving wheel; 53, first transmission member; 54, second transmission member; 61, connecting seat; 62, vertical rod; 63, horizontal rod; 64, spring; 7, angle sensor; 8, telescope; 81, telescopic motor; 82, telescopic rod; 9, discharge port. DETAILED DESCRIPTION

[0033] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only intended to enable those skilled in the art to better understand and implement the subject matter described herein. In addition, the features described relative to some examples may also be combined in other examples.

[0034] like Figure 1-Figure 6 As shown, a seeding machine 100 with controllable seeding stroke includes a frame 1, a stubble-removing device and a furrowing device 2 arranged at the front end of the frame 1, wherein the stubble-removing device is used for removing the stubble of the land to remove the crop stubble left in the land after harvesting, and the soil can be plowed by the stubble-removing device when in use, and the furrowing device 2 is used for furrowing and covering the soil so that seeds and fertilizers can fall into the opened furrows within a set interval time.

[0035] The seeder 100 also includes a sowing unit 3 and a pressure wheel unit 4, wherein a plurality of sowing units 3 are arranged on the frame 1, each sowing unit 3 includes a sowing box 31, a transmission shaft 32 and a control component 33, the control component 33 is arranged at the discharge port 9 of the sowing box 31, the control component 33 includes a first control shaft 331 and a control panel 332, one side of the first control shaft 331 is coupled to the transmission shaft 32, and the other side is coupled to the control panel 332, and a slot 333 is provided on the control panel 332.

[0036] A plurality of pressing wheel units 4 are connected to the rear end of the frame 1. Each pressing wheel 41 assembly includes a pressing wheel 41, a first driving wheel 42 and a fixing frame 43. The pressing wheel 41 is rotatably connected to one end of the fixing frame 43, and the pressing wheel 41 can freely rotate relative to the fixing frame 43 along its axis. The other end of the fixing frame 43 is sleeved on the transmission shaft 32, and the fixing frame 43 can freely swing relative to the transmission shaft 32, that is, the rotation state of the transmission shaft 32 will not affect the state of the fixing frame 43.

[0037] It should be noted here that the front end of the above-mentioned frame 1 refers to the side close to the tractor head. Similarly, the rear end of the above-mentioned frame 1 refers to the side away from the tractor head, that is, the pressure wheel unit 4 is arranged at the tail of the frame 1.

[0038] More specifically, the first driving wheel 42 is rigidly connected coaxially with the pressure wheel 41, that is, the first driving wheel 42 and the pressure wheel 41 rotate synchronously, and the first driving wheel 42 is coupled to the transmission shaft 32, wherein the transmission shaft 32 is provided with a first driven wheel 51 and a second driving wheel 52, and the first driven wheel 51 and the second driving wheel 52 are rigidly connected to the transmission shaft 32, and can achieve synchronous rotation following the rotation of the transmission shaft 32.

[0039] At the same time, a first transmission member 53 is provided between the first driving wheel 42 and the first driven wheel 51, and a second transmission member 54 is provided between the second driving wheel 52 and the control member 33. Preferably, the first transmission member 53 can use a transmission belt or a transmission chain for power transmission. Similarly, the second transmission member 54 can also use a transmission belt or a transmission chain for power transmission. This is not only conducive to long-distance power connection, but also low in cost, which is convenient for daily maintenance and replacement of the seeder 100.

[0040] When in use, the frame 1 moves in the field following the tractor head, and the pressure wheel 41 rolls along the ground in the field. The pressure wheel 41 synchronously drives the first driving wheel 42 to rotate. The first driving wheel 42 can transmit the power of the pressure wheel 41 to the first driven wheel 51 on the transmission shaft 32 through the first transmission member 53, thereby driving the transmission shaft 32 to rotate, and then use the second driving wheel 52 and the second transmission member 54 to synchronously transmit the power to the first control shaft 331. At this time, since the first control shaft 331 is connected to the control board 332, the control board 332 can be driven to rotate.

[0041] When the slot 333 on the control board 332 is disconnected from the discharge port 9 of the seeding box 31, the discharge port 9 of the seeding box 31 is blocked by the surface of the control board 332, and the seeds cannot fall smoothly. At this time, the discharge port 9 of the seeding box 31 is in a closed state.

[0042] When the notch 333 on the control panel 332 is connected to the discharge port 9 of the sowing box 31, the seeds in the sowing box 31 can fall into the grooves opened by the furrowing device 2 through the discharge port 9. At this time, the discharge port 9 of the sowing box 31 is in an open state.

[0043] Therefore, the present invention can not only realize the effect of pressing the sowing groove area by utilizing the pressure wheel 41, but also can be converted into a power source and spacing measurement standard for controlling the sowing of the sowing unit 3, so as to accurately realize the arrangement effect of seeds with equal row spacing, thereby eliminating the influence of vehicle driving speed or driving technology on row spacing, which is conducive to the standardized planting of crops and ensures crop yield.

[0044] Specifically, the size and structure of the pressure wheel 41 of each pressure wheel unit 4 are the same, so within the same time period, the peripheral rotation distance of each pressure wheel 41 is also the same. Therefore, the peripheral length of the pressure wheel 41 can be used as a measure of the sowing spacing. Regardless of the speed of travel, as long as the rotation distance of each pressure wheel 41 is the same, the rotation angle of the control board 332 that controls the opening and closing of the discharge port 9 of the sowing box 31 is the same. In this way, in theory, it can be ensured that the slot 333 of the control board 332 can be connected to the discharge port 9 of the sowing box 31 at the same time, so as to achieve the effect of simultaneous sowing.

[0045] Of course, it should also be noted that in order to achieve the effect of synchronous sowing, the position of the notch 333 of the control board 332 of each sowing unit 3 needs to be at the same initial position.

[0046] Further, based on the above embodiment, Figure 4 As shown, the control board 332 is arranged in the seeding box 31, and the control member 33 also includes a second control shaft 334, wherein one end of the second control shaft 334 is connected to the control board 332, and the other end passes through the box body of the seeding box 31 and is coupled to the first control shaft 331.

[0047] When in use, when the slot 333 on the control panel 332 rotates to the side away from the sowing box 31, the seeds can fall into the slot 333 and rotate with the control panel 332 until the discharge port 9 of the sowing box 31. In this way, the amount of seeds falling during each sowing can be controlled by the size of the slot 333 on the control panel 332, thereby avoiding uneven amount of seeds falling that affects the later growth of the plants.

[0048] Furthermore, based on the above embodiment, Figure 4 As shown, the control panel 332 is vertically inclined in the sowing box 31, and the discharge port 9 of the sowing box 31 is arranged on the side close to the upper end of the control panel 332. Specifically, a feed port is provided at the top of the sowing box 31, and the discharge port 9 of the sowing box 31 is arranged on the side away from the feed port.

[0049] During use, after the seeds enter the sowing box 31 from the feed port of the sowing box 31, they are accumulated below the feed port, and some of the seeds are in close contact with the control board 332. Since the control board 332 is tilted, when the slot 333 of the control board 332 rotates to the bottom, the seeds can enter the slot 333, and then follow the control board 332 to rotate to the discharge port 9 of the sowing box 31 and fall down.

[0050] In this way, when the seeds enter from the feed port and accumulate in the seeding box 31 , the weight of the seeds will not be completely pressed on the control board 332 , thereby reducing the rotation resistance of the control board 332 and avoiding affecting the normal rotation of the control board 332 .

[0051] Preferably, in some embodiments of the present application, a scraper 335 is further provided on the inner wall of the seeding box 31. When in use, the scraper 335 is fixed to the inner wall of the seeding box 31, and the working part of the scraper 335 is close to the upper plate surface of the control plate 332. The length of the working part of the scraper 335 can at least cover the slot 333 area. In this way, when the slot 333 of the control plate 332 rotates to the scraper 335, the scraper 335 can be used to sweep the seeds near the slot 333, accurately control the seed output, and avoid excess seeds from falling and affecting the growth of plants in the later stage.

[0052] In some embodiments of the present invention, Figure 5 As shown, the seed drill 100 also includes a connecting seat 61, a vertical rod 62 and a cross rod 63, wherein the connecting seat 61 is fixed on the frame 1, one end of the vertical rod 62 is hinged to the fixing frame 43, and the other end is slidably connected to the cross rod 63, and both ends of the cross rod 63 are rotatably arranged on the connecting seat 61, and a spring 64 is also arranged between the connecting seat 61 and the fixing frame 43, and the spring 64 is sleeved on the vertical rod 62.

[0053] Specifically, according to the contents of the above embodiments, the pressure wheel 41 is the power source for sowing by the sowing unit 3. Therefore, through the combination of the vertical rod 62 and the spring 64, sufficient downward pressure can be provided to the pressure wheel 41 to increase the friction between the pressure wheel 41 and the soil, thereby avoiding slipping and affecting the rotation of the control panel 332, resulting in failure of normal sowing.

[0054] Further, based on the above embodiment, Figure 5 and Figure 6As shown, the seed drill 100 also includes an angle sensor 7, a telescopic device 8 and a central processing unit, wherein the angle sensor 7 is connected to one end of the cross bar 63 to obtain the angle change of the cross bar 63, the telescopic device 8 is arranged on the transmission shaft 32, the telescopic device 8 includes a telescopic motor 81 and a telescopic rod 82, the telescopic rod 82 is connected to the telescopic motor 81, the telescopic rod 82 is embedded between the first driven wheel 51 and the transmission shaft 32, the angle sensor 7 is electrically connected to the central processing unit, and the telescopic motor 81 is electrically connected to the central processing unit.

[0055] When in use, the cross bar 63 is provided with gear teeth, and the vertical bar 62 is provided with a tooth plate. The gear teeth and the tooth plate are meshed, so that when the vertical bar 62 moves up and down, the cross bar 63 can be driven to rotate.

[0056] A first key groove is provided on the inner side surface of the first driven wheel 51 , a second key groove is provided on the transmission shaft 32 , and the telescopic rod 82 is embedded in both the first key groove and the second key groove.

[0057] When the seed drill 100 is in normal operation, the telescopic rod 82 is embedded between the first driven wheel 51 and the transmission shaft 32 . At this time, the telescopic rod 82 is equivalent to a key pin, and the first driven wheel 51 can use the telescopic rod 82 to normally transmit power to the transmission shaft 32 .

[0058] However, when the pressure wheel 41 rolls over objects such as stubble and stones, the central processor sends a command to the telescopic device 8 to retract the telescopic rod 82, thereby causing a lack of transmission objects between the first driven wheel 51 and the transmission shaft 32, thereby causing the first driven wheel 51 to idle relative to the transmission shaft 32.

[0059] Specifically, after the furrowing device 2 has dug a furrow, it can push the stubble, stones or hard soil blocks remaining on or under the ground to both sides, but the ground wheel passing behind will inevitably run over the stubble, stones or hard soil blocks. In this process, the actual circumference of the ground wheel is not the actual movement of the frame 1, but is greater than the actual movement of the frame 1. This will cause the actual rotation angle of the control board 332 to be greater than the actual displacement distance, thereby causing the seeds to fall in advance, and then causing errors in the seed row spacing, and the seed row spacing cannot be effectively controlled.

[0060] Moreover, in different sowing units 3, the objects that the pressing wheel 41 encounters are of different sizes, causing different errors. Moreover, after crushing stones or stubble roots for many times, it is easy for different sowing units 3 to have different sowing times.

[0061] Therefore, in this embodiment, the angle sensor 7 monitors the angle change, thereby determining whether the pressure wheel 41 presses against obstacles such as stubble roots and stones. Once the angle changes significantly, the central processor can control the telescopic rod 82 of the corresponding pressure wheel unit 4 to retract, thereby causing the first driven wheel 51 to idle. In addition, since the planter 100 has multiple pressure wheel units 4, the pressure wheels 41 in other pressure wheel units 4 are in normal operation, which can ensure that the transmission shaft 32 always operates normally, thereby eliminating the error influence of a certain pressure wheel 41 crushing a stone, and effectively maintaining the same seed row spacing.

[0062] Of course, it should be noted that, in this embodiment, the transmission shafts 32 of adjacent sowing units 3 are rigidly connected to ensure that different control panels 332 can rotate synchronously with the transmission shafts 32 .

[0063] Preferably, on the basis of the above embodiment, a ball bearing is further provided at the front end of the telescopic rod 82 to reduce the wear between the telescopic rod 82 and the first driven wheel 51 or the transmission shaft 32 .

[0064] Specifically, when the pressure wheel 41 leaves the stone or stubble, the angle sensor 7 detects that the angle of the cross bar 63 returns to normal, and the central processor sends a command to the telescopic device 8, causing the telescopic rod 82 to extend forward. However, since the first driven wheel 51 and the transmission shaft 32 were in a state of relative motion, the telescopic rod 82 cannot be extended into the first key slot of the first driven wheel 51 at one time, so the end of the telescopic rod 82 will abut against the side wall of the first driven wheel 51 until the telescopic rod 82 is successfully embedded in the first key slot.

[0065] Therefore, after the ball bearing is embedded in the end of the telescopic rod 82 , the wear between the telescopic rod 82 and the first driven wheel 51 can be reduced, which is beneficial to improving the service life of the first driven wheel 51 .

[0066] The present embodiment is described above, but the present embodiment is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, which are all within the protection of the present embodiment.

Claims

1. A seeder with controllable seeding stroke, characterized in that: include: frame; A ditching device, the ditching device is connected to the front end of the frame; A sowing unit, wherein a plurality of the sowing units are arranged on the frame, and the sowing unit comprises: A seeding box, a transmission shaft and a control member, wherein the control member is arranged at the discharge port of the seeding box, and the control member comprises a first control shaft and a control board, one side of the first control shaft is coupled to the transmission shaft, and the other side is coupled to the control board, and a notch is arranged on the control board; A pressing wheel unit, wherein a plurality of the pressing wheel units are connected to the rear end of the frame, and the pressing wheel unit comprises: A pressure wheel, a first driving wheel and a fixing frame, wherein the pressure wheel is rotatably connected to one end of the fixing frame, and the other end of the fixing frame is sleeved on the transmission shaft; The first driving wheel is coupled to the pressure wheel, and the first driving wheel is coupled to the transmission shaft, so as to first transmit power to the transmission shaft, and then transmit power to the first control shaft, so as to drive the control plate to rotate, thereby realizing the opening and closing of the discharge port of the seeding box; The control board is arranged in the seeding box, and the control member further comprises a second control shaft, one end of which is connected to the control board, and the other end of which passes through the box body of the seeding box and is coupled to the first control shaft; The control panel is vertically and obliquely arranged in the sowing box, and the discharge port of the sowing box is arranged on one side close to the upper end of the control member; A scraper is also provided on the inner side wall of the seeding box, and the working portion of the scraper is adjacent to the upper plate surface of the control plate and covers the notch area; The transmission shaft is provided with a first driven wheel and a second driving wheel, a first transmission member is provided between the first driving wheel and the first driven wheel, and a second transmission member is provided between the second driving wheel and the control member; The first transmission member is a transmission belt or a transmission chain, and / or the second transmission member is a transmission belt or a transmission chain; Also includes: A connecting seat, a vertical rod and a cross rod, wherein the connecting seat is fixedly arranged on the frame, one end of the vertical rod is hinged to the fixing frame, and the other end is slidably connected to the cross rod, and both ends of the cross rod are rotatably arranged on the connecting seat, and a spring is further arranged between the connecting seat and the fixing frame, and the spring is sleeved on the vertical rod; Also includes: An angle sensor, a telescoping device and a central processing unit, wherein the angle sensor is connected to one end of the crossbar to obtain a rotation angle change of the crossbar; The telescopic device is arranged on the transmission shaft, and the telescopic device includes a telescopic motor and a telescopic rod. The telescopic rod is connected to the telescopic motor, and the telescopic rod is embedded between the first driven wheel and the transmission shaft. The angle sensor is electrically connected to the central processing unit, and the telescopic motor is electrically connected to the central processing unit. The transmission shafts of adjacent sowing units are rigidly connected.

2. A planter with controllable seeding stroke according to claim 1, characterized in that: A ball is also embedded in the front end of the telescopic rod.

3. A method for modifying a seeder with controllable seeding stroke, characterized in that: The structural transformation of the seeder with controllable seeding stroke according to any one of claims 1 to 2 specifically comprises the following steps: S1, coaxially installing a first driving wheel on one side of the pressing wheel; S2. According to the structural layout of the frame, a transmission shaft is added to the frame, and a first transmission member is sleeved on the transmission shaft and the first driving wheel; S3, installing a first control shaft and a control board with a slot at the discharge port of the seeding box, and coupling the control board with the first control shaft, and sleeve a second transmission member on the first control shaft and the transmission shaft.

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