A seeding device with adjustable seeding depth

Abstract

The utility model is suitable for agricultural seeding mechanical technical field provides a kind of seeding device of adjustable seeding depth, including seed box, the bottom of seed box is equipped with seed box support, and one end of seed box support is equipped with seeding frame;In the utility model, by rotating first adjusting handle, the compression degree of first compression spring can be flexibly adjusted by the aid of first split pin, hexagonal head snap spring shaft and other components, and then seeding depth adjusting frame is driven to accurately lift, compared with the mode of traditional manual plug-in plug or adjusting nut, not only simple operation, but also with clear adjustment hand feeling feedback, cooperate with the scale mark that can be set, and farmers can easily and accurately control seeding depth, so that the seeding depth in the same field remains highly consistent, creates uniform growth environment for seeds, effectively improves seed germination rate and emergence quality, ensures crop growth neat, and lays a solid foundation for yield increase and quality improvement.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural seeding machinery technology, and in particular relates to a seeding device with adjustable seeding depth. Background Technology

[0002] In modern agricultural production, sowing is a crucial initial step. Precise control of sowing depth plays a decisive role in seed germination, seedling quality, and subsequent crop growth. However, the sowing devices currently used in the agricultural sowing field have many problems in adjusting sowing depth, which urgently need to be solved.

[0003] Many existing seeding devices change the height of the seeding component by manually inserting and removing pins or adjusting nuts. However, in practical applications, they lack precise scale markings and calibration mechanisms. Farmers find it difficult to accurately control the seeding depth during operation, resulting in significant differences in seeding depth within the same field. Some seeds are sown too shallowly, making them susceptible to drought, birds, animals, and other factors, preventing them from taking root and growing properly. Ultimately, this leads to uneven crop growth, severely impacting yield and quality. Therefore, a seeding device with adjustable seeding depth is needed to solve these problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a seeding device with adjustable seeding depth to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An adjustable seeding depth seeding device includes a seed box, a seed box support at the bottom of the seed box, a seeder frame at one end of the seed box support, a seeding depth adjustment device inside the seeder frame, a pressure roller angle and pressure adjustment device at one end of the seeder frame, a seed guide tube device inside the middle of the seeder frame, a four-bar linkage contoured upper support arm at the other end of the seeder frame, a furrowing disc pressure adjustment device inside the four-bar linkage contoured upper support arm, and a soil clod removal device at the bottom of one end of the seeder frame.

[0007] The sowing depth adjustment device includes a first adjustment handle, a first cotter pin, a first compression spring, a hexagonal head retaining ring shaft, a sowing depth adjustment frame, a first felt plastic sleeve, an adjustment frame, a first washer, and a first shaft retaining ring. The first adjustment handle is connected to the hexagonal head retaining ring shaft via the first cotter pin. The hexagonal head retaining ring shaft passes through the first compression spring and the first felt plastic sleeve in sequence and is then installed on the sowing depth adjustment frame. Axial positioning is achieved by the first shaft retaining ring.

[0008] The trenching disc pressure regulating device includes a plastic support cover, a second shaft retaining ring, a second washer, a third compression spring, a plastic support, a cast adjustment unit, and a hinge bolt. The plastic support cover has mounting holes. The hinge bolt passes through the plastic support cover, the second shaft retaining ring, and the second washer in sequence and is connected to the plastic support. The third compression spring is sleeved on the hinge bolt and is located between the plastic support and the cast adjustment unit.

[0009] A further technical solution includes an M12 bolt, an M12 washer, an M12 bolt sleeve, an O-ring, a second felted plastic sleeve, an M12 self-locking nut, an M10 bolt, an M10 washer, an M10 spacer sleeve, an M16 ordinary nut, an M16 locking washer, an M16 spacer sleeve, an M16 bolt, a second compression spring, a second cotter pin, a second adjusting handle, a compression tension spring, a knob adjusting handle, and a pressure roller adjusting bracket. The M12 bolt passes sequentially through the M12 washer, the M12 bolt sleeve, the O-ring, and the second felted plastic sleeve before being tightened and positioned with the M12 self-locking nut. The M10 bolt passes sequentially through the M10 washer and the M10 spacer sleeve before being fixed with the ordinary nut and the M16 locking washer. The M16 bolt passes through the M16 spacer sleeve and the pressure roller adjusting bracket before being fitted with the second compression spring and then fixed with the second cotter pin. The second adjusting handle and the knob adjusting handle are mounted on the pressure roller adjusting bracket.

[0010] A further technical solution is that the soil removal device includes a pin, a locking pin, an intermediate adjusting block, an M6 square neck bolt, an M6 self-locking nut, an M6 washer, and a soil removal device. The pin passes through the intermediate adjusting block and is fixed by the locking pin. The M6 ​​square neck bolt passes through the M6 ​​washer and the intermediate adjusting block in sequence and is then tightened with the M6 ​​self-locking nut.

[0011] A further technical solution is provided, wherein the seed guide device includes a stainless steel seed guide tube, a fixing rope, a gun barrel handle, a limiting sleeve, a shock-absorbing sleeve, and a Torx screw. The top end of the stainless steel seed guide tube is connected to the bottom end of the seed box through a pipe. The stainless steel seed guide tube is connected to the gun barrel handle through a fixing rope. The gun barrel handle, the limiting sleeve, and the shock-absorbing sleeve are connected through Torx screws. The bottom end of the stainless steel seed guide tube is curved. A seed furrow former is provided at the bottom of the stainless steel seed guide tube. An M8 self-locking washer and an M8 hex bolt are provided between the bottom of the stainless steel seed guide tube and the seed furrow former.

[0012] A further technical solution is provided in which the bottom of the seeder frame is provided with a seed pressing wheel, a depth limiting wheel and a furrowing disc, and a depth limiting wheel scraper is fixed to the rim of the depth limiting wheel by welding. The surface of the seed pressing wheel is serrated, and a seed furrow former is provided on the outer side of the seed pressing wheel.

[0013] In a further technical solution, one end of the four-bar linkage upper support arm is rotatably connected to a four-bar linkage lower support arm, and a grooved disc pressure spring is provided between the four-bar linkage upper support arm and the four-bar linkage lower support arm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention, through its specially designed sowing depth adjustment device, enables precise depth adjustment. By rotating the first adjustment handle, the compression level of the first compression spring can be flexibly adjusted using components such as the first cotter pin and hexagonal head spring shaft, thereby driving the sowing depth adjustment frame to rise and fall precisely. Compared with the traditional method of manually inserting and removing pins or adjusting nuts, this adjustment method is not only simple to operate but also provides clear tactile feedback. With the addition of configurable scale markings, farmers can easily and accurately control the sowing depth, ensuring a high degree of consistency in sowing depth within the same field. This creates a uniform growth environment for seeds, effectively improving seed germination rate and seedling quality, ensuring uniform crop growth, and laying a solid foundation for increased yield and quality.

[0016] This invention relates to a roller angle and pressure adjustment device. Through the coordinated action of multiple bolts, nuts, washers, and springs, along with a second compression spring and a compression-tension spring, and using a second adjustment handle and a knob adjustment handle, the angle and pressure of the roller can be flexibly adjusted. This allows for optimization of seed coverage and compaction according to the sowing needs of different crops, providing suitable seedbed conditions for their growth. Furthermore, a soil clod removal device can promptly remove soil clods encountered during sowing, preventing them from affecting sowing quality and equipment operation, and ensuring smooth sowing operations.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of this utility model;

[0019] Figure 2 This is a three-dimensional cross-sectional view of the main body of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the sowing depth adjustment device of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the trenching disc pressure regulating device of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the pressure roller angle and pressure adjustment device of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the soil clod removal device of this utility model;

[0024] Figure 7 This is a three-dimensional structural diagram of the seed furrow forming device of this utility model;

[0025] Figure 8 This is a three-dimensional structural diagram of the seed guide tube device of this utility model.

[0026] In the diagram: 1. Seed box; 2. Seed box support; 3. Seeder frame; 4. Seeding depth adjustment device; 5. Pressure roller angle and pressure adjustment device; 6. Seed guide tube device; 7. Four-bar linkage upper support arm; 8. Soil clod removal device; 9. Furrowing disc pressure adjustment device; 10. Four-bar linkage lower support arm; 11. Depth limiting wheel scraper; 12. Seed pressing wheel; 13. Depth limiting wheel; 14. Furrowing disc; 15. Furrowing disc pressure spring; 16. Seed furrow former; 17. M8 self-locking washer; 18. M8 Hex bolt; 401, First adjusting handle; 402, First cotter pin; 403, First compression spring; 404, Hex head snap ring shaft; 405, Seeding depth adjusting frame; 406, First plastic sleeve with felt; 407, Adjusting rib; 408, First washer; 409, First shaft retaining ring; 501, M12 bolt; 502, M12 washer; 503, M12 bolt sleeve; 504, O-ring; 505, Second plastic sleeve with felt; 506, M12 self-locking nut; 507. M10 bolt; 508. M10 washer; 509. M10 spacer sleeve; 510. M16 nut; 511. M16 locking washer; 512. M16 spacer sleeve; 513. M16 bolt; 514. Second compression spring; 515. Second cotter pin; 516. Second adjusting handle; 517. Compression / tension spring; 518. Knob adjusting handle; 519. Pressure roller adjusting bracket; 601. Stainless steel seed guide tube; 602. Fixing rope; 603. Gun Pipe handle; 604, limit sleeve; 605, shock absorber sleeve; 606, Torx screw; 801, pin; 802, locking pin; 803, intermediate adjusting quick; 804, M6 square neck bolt; 805, M6 self-locking nut; 806, M6 washer; 807, clod remover; 901, plastic support cover; 902, second shaft retaining ring; 903, second washer; 904, third compression spring; 905, plastic support; 906, cast adjustment unit; 907, hinge bolt. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 utility model and are not intended to limit the present utility model.

[0028] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0029] like Figures 1-8 As shown, this utility model embodiment provides a seeding device with adjustable seeding depth, including a seed box 1, a seed box support 2 at the bottom of the seed box 1, a seeder frame 3 at one end of the seed box support 2, a seeding depth adjustment device 4 inside the seeder frame 3, a pressure roller angle and pressure adjustment device 5 at one end of the seeder frame 3, a seed guide tube device 6 inside the middle of the seeder frame 3, a four-bar linkage upper support arm 7 at the other end of the seeder frame 3, a furrowing disc pressure adjustment device 9 inside the four-bar linkage upper support arm 7, and a soil clod removal device 8 at the bottom of one end of the seeder frame 3.

[0030] The sowing depth adjustment device 4 includes a first adjustment handle 401, a first cotter pin 402, a first compression spring 403, a hexagonal head retaining ring shaft 404, a sowing depth adjustment frame 405, a first felt-covered plastic sleeve 406, an adjustment frame 407, a first washer 408, and a first shaft retaining ring 409. The first adjustment handle 401 is connected to the hexagonal head retaining ring shaft 404 through the first cotter pin 402. The hexagonal head retaining ring shaft 404 passes through the first compression spring 403 and the first felt-covered plastic sleeve 406 in sequence and is then installed on the sowing depth adjustment frame 405. The first shaft retaining ring 409 is used for axial positioning.

[0031] The trenching disc pressure regulating device 9 includes a plastic support cover 901, a second shaft retaining ring 902, a second washer 903, a third compression spring 904, a plastic support 905, a cast adjusting unit 906, and a hinge bolt 907. The plastic support cover 901 has mounting holes. The hinge bolt 907 passes through the plastic support cover 901, the second shaft retaining ring 902, and the second washer 903 in sequence and is connected to the plastic support 905. The third compression spring 904 is sleeved on the hinge bolt 907 and is located between the plastic support 905 and the cast adjusting unit 906.

[0032] In this embodiment, the operator rotates the first adjusting handle 401, which drives the hexagonal head retaining spring shaft 404 to rotate via the first cotter pin 402. During rotation, the hexagonal head retaining spring shaft 404 changes the compression degree of the first compression spring 403. The expansion and contraction of the first compression spring 403 pushes or pulls the sowing depth adjusting frame 405 to move up and down. The sowing depth adjusting frame 405 is connected to the seeder frame 3, thereby driving the entire sowing operation components, such as the furrowing disc 14 and the seed pressing wheel 12, to rise or fall, thus achieving precise adjustment of the sowing depth. The adjusting frame 407 and the first washer 408 provide auxiliary support and adjustment. The first plastic sleeve with a felt 406 reduces friction between components, and the first shaft retaining ring 409 prevents axial movement of the hexagonal head retaining spring shaft 404, ensuring... The adjustment process is stable and reliable. During the movement of the equipment, the furrowing disc 14 moves forward with the sowing device. The furrowing disc pressure adjustment device 9 plays a role. When the hinge bolt 907 is rotated, the movement of the hinge bolt 907 will change the compression amount of the third compression spring 904. The change in the elastic force of the third compression spring 904 will act on the casting adjustment unit 906, thereby adjusting the pressure of the furrowing disc 14 on the soil. Under different soil conditions, such as clay, a larger pressure is needed to break the soil, while sandy soil requires a smaller pressure to avoid excessive furrowing. In this way, the furrowing disc 14 can smoothly open furrows of appropriate depth and width in the soil. The plastic support cover 901, the second shaft retaining ring 902, the second washer 903 and the plastic support 905 work together to ensure the stable installation and normal operation of the hinge bolt 907 and the third compression spring 904.

[0033] like Figure 2 ,and Figure 5As shown, specifically, the pressure roller angle and pressure adjustment device 5 includes an M12 bolt 501, an M12 washer 502, an M12 bolt sleeve 503, an O-ring 504, a second felt-covered plastic sleeve 505, an M12 self-locking nut 506, an M10 bolt 507, an M10 washer 508, an M10 spacer sleeve 509, an M16 ordinary nut 510, an M16 locking washer 511, an M16 spacer sleeve 512, an M16 bolt 513, a second compression spring 514, a second cotter pin 515, a second adjusting handle 516, a compression tension spring 517, a knob adjusting handle 518, and a pressure roller adjusting bracket 519. The M12 bolt 501 passes through the M12 washer 502, M12 bolt sleeve 503, O-ring 504, and second felt plastic sleeve 505 in sequence, and is then tightened and positioned with the M12 self-locking nut 506. The M10 bolt 507 passes through the M10 washer 508 and M10 spacer sleeve 509 in sequence, and is then fixed with the M16 ordinary nut 510 and M16 locking washer 511. The M16 bolt 513 passes through the M16 spacer sleeve 512 and the pressure roller adjusting bracket 519, and is then fitted with the second compression spring 514, and then fixed with the second cotter pin 515. The second adjusting handle 516 and the knob adjusting handle 518 are mounted on the pressure roller adjusting bracket 519.

[0034] In this embodiment, the pressure roller angle and pressure adjustment device 5 adjusts the pressure by rotating the second adjustment handle 516 and the knob adjustment handle 518. The rotation of the second adjustment handle 516 causes related components such as the M12 bolt 501 and M12 washer 502 to move, changing the position of the M12 bolt 501. This, in turn, adjusts the tension of the pressure roller tension spring 517 via the M12 self-locking nut 506 and other connecting components, thus adjusting the pressure of the pressure roller. The knob adjustment handle 518 is mainly used for fine-tuning the angle of the pressure roller. The position of the M16 bolt 513 and other components connected to it is changed, and the tilt angle of the pressure roller is adjusted to adapt to the sowing requirements of different crop seeds and soil conditions, so as to ensure that the seeds are properly compacted and covered in the seed furrow. The M10 bolt 507, M10 washer 508, M10 spacer sleeve 509, M16 ordinary nut 510, M16 locking washer 511, M16 spacer sleeve 512 and second compression spring 514 and other components work together to ensure the stable operation and precise adjustment of the pressure roller angle and pressure adjustment device 5.

[0035] like Figure 2 and Figure 6 As shown, specifically, the soil removal device 8 includes a pin 801, a locking pin 802, an intermediate adjusting block 803, an M6 square neck bolt 804, an M6 self-locking nut 805, an M6 washer 806, and a soil remover 807. The pin 801 passes through the intermediate adjusting block 803 and is fixed by the locking pin 802. The M6 ​​square neck bolt 804 passes through the M6 ​​washer 806 and the intermediate adjusting block 803 in sequence and is then tightened with the M6 ​​self-locking nut 805.

[0036] In this embodiment, the clod removal device 8 plays a role in the sowing process. When encountering clods, the clod remover 807 first contacts the clod. The pin 801 passes through the intermediate adjusting block 803 and is fixed by the locking pin 802, so that the clod remover 807 maintains a stable installation state. The M6 ​​square neck bolt 804 passes through the M6 ​​washer 806 and the intermediate adjusting block 803 in sequence and is tightened with the M6 ​​self-locking nut 805, which can adjust the height and angle of the clod remover 807. During the movement of the equipment, the clod remover 807 breaks or pushes away larger clods, preventing clods from affecting the normal furrowing operation of the furrowing disc 14, the smooth sowing of seeds, and the normal operation of the seed pressing wheel 12 and the depth limiting wheel 13, thus ensuring the smooth progress of the sowing operation.

[0037] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, specifically, the seed guide device 6 includes a stainless steel seed guide 601, a fixing rope 602, a gun barrel handle 603, a limiting sleeve 604, a shock-absorbing sleeve 605, and a Torx screw 606. The top end of the stainless steel seed guide 601 is connected to the bottom end of the seed box 1 through a pipe. The stainless steel seed guide 601 and the gun barrel handle 603 are connected by the fixing rope 602. The gun barrel handle 603, the limiting sleeve 604, and the shock-absorbing sleeve 605 are connected by the Torx screw 606. The bottom end of the stainless steel seed guide 601 is curved. A seed furrow former 16 is provided at the bottom of the stainless steel seed guide 601. An M8 self-locking washer 17 and an M8 hex bolt 18 are provided between the bottom of the stainless steel seed guide 601 and the seed furrow former 16.

[0038] The bottom of the seeder frame 3 is provided with a seed pressing wheel 12, a depth limiting wheel 13 and a furrowing disc 14. The depth limiting wheel 13 is fixed to the wheel rim by welding with a soil scraping plate 11. The surface of the seed pressing wheel 12 is serrated, and a furrow forming device 16 is provided on the outer side of the seed pressing wheel 12.

[0039] One end of the four-bar linkage upper support arm 7 is rotatably connected to the four-bar linkage lower support arm 10, and a grooved disc pressure spring 15 is provided between the four-bar linkage upper support arm 7 and the four-bar linkage lower support arm 10.

[0040] In this embodiment, the seeds in the seed box 1 fall downwards by gravity through the stainless steel seed guide tube 601 connected to the bottom of the seed box 1. When the seeds pass through the stainless steel seed guide tube 601, due to its special curved structure and the guidance of the seed furrow former 16, they can accurately fall into the seed furrow opened by the furrow opening plate 14. The gun barrel handle 603, the limiting sleeve 604, and the shock-absorbing sleeve 605 are connected by a Torx screw 606, which provides support and stability to the stainless steel seed guide tube 601. At the same time, the shock-absorbing sleeve 605 can reduce the impact of equipment vibration on the seed falling process and ensure the accuracy of seed sowing. After the seeds fall into the seed furrow, the serrated surface of the pressing wheel 12 will press the seeds into the bottom of the furrow, so that the seeds are in close contact with the soil, which is conducive to the absorption of water and nutrients by the seeds and promotes germination and rooting. The depth limiting wheel 13 is also installed at the bottom of the seeder frame 3, and a depth limiting wheel scraper 11 is welded to its wheel rim. When the depth limiting wheel 13 rolls on the ground, it serves to limit the sowing. The purpose of the planting depth is to ensure that the planting furrow depth opened by the furrowing disc 14 meets the set requirements. On the other hand, the soil scraper 11 of the depth limiting wheel can promptly remove the soil attached to the depth limiting wheel 13, preventing soil accumulation from affecting the normal rolling of the depth limiting wheel 13 and the depth control accuracy. As the equipment moves forward, the seed pressing wheel 12 and the depth limiting wheel 13 work together to compact the seeds and close the planting furrow, completing the sowing operation. During the sowing operation, when the sowing device encounters different terrains such as slopes and low-lying areas, the four-bar linkage contouring structure will automatically adjust its posture according to the undulations of the ground. When working on slopes, the four-bar linkage contouring lower support arm 10 on the lower side of the terrain will be subjected to an upward force from the ground. Through the transmission of the four-bar linkage mechanism, the furrowing disc 14, the seed pressing wheel 12, and the depth limiting wheel 13 are raised as a whole, maintaining a constant relative height with the ground, ensuring consistent sowing depth. When working in low-lying areas, the four-bar linkage contouring structure will lower these components as a whole to adapt to changes in terrain. The furrowing disc pressure spring 15 serves as a buffer and adjuster, enabling the seeding device to smoothly transition when the terrain changes, thus ensuring the continuity and stability of the seeding operation.

[0041] The working principle of this utility model is as follows: First, the operator needs to adjust parameters such as sowing depth, furrowing disc pressure, and pressure roller angle and pressure according to seed characteristics, soil conditions, and terrain. When adjusting the sowing depth, the first adjusting handle 401 is rotated, which drives the hexagonal head retaining spring shaft 404 to rotate through the first cotter pin 402, thereby changing the compression degree of the first compression spring 403, causing the sowing depth adjusting frame to rise and fall, thus achieving precise adjustment of the sowing depth. The furrowing disc pressure is adjusted by rotating the hinge bolt 907, which changes the compression amount of the third compression spring 904, thereby adjusting the pressure of the furrowing disc on the soil. The adjustment of the pressure roller angle and pressure is achieved by rotating the second adjusting handle 516 and the knob adjusting handle 108, which drives the movement of related components, changing the spring tension and component position. Then, during the sowing operation, the seeds in the seed box 1 fall into the seed furrow under the action of gravity through the stainless steel seed guide tube 601. The top of 601 is connected to the seed box 1, and the bottom is bent and equipped with a seed furrow former 16. The two are fixed by M8 self-locking washers 17 and M8 hex bolts 18 to ensure accurate seed placement. At the same time, during the movement of the equipment, the furrowing disc opens the seed furrow under the adjusted pressure. The serrations on the surface of the seed pressing wheel 12 press the seeds into the bottom of the furrow, making them in close contact with the soil. The depth limiting wheel 13 controls the sowing depth, and the depth limiting wheel scraper 11 on its rim removes the attached soil in time to ensure the normal operation of the depth limiting wheel. In addition, the four-link contour structure automatically adjusts its posture according to the terrain undulations to ensure stable sowing depth. Finally, if soil clods are encountered during the sowing process, the soil clod remover 807 is installed on the intermediate adjusting block 803 through the pin 801 and locking pin 802. The height and angle of the soil clods can be adjusted by M6 square neck bolts 804 and M6 self-locking nuts 805 to break or push away the soil clods and avoid affecting the smooth progress of the sowing operation. All components work together to complete the entire sowing process.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seeding device with adjustable seeding depth, comprising a seed box (1), characterized in that: The seed box (1) is provided with a seed box support (2) at the bottom. One end of the seed box support (2) is provided with a seeder frame (3). The seeder frame (3) is provided with a seeding depth adjustment device (4) inside. One end of the seeder frame (3) is provided with a pressure roller angle and pressure adjustment device (5). The seeder frame (3) is provided with a seed guide tube device (6) in the middle. The other end of the seeder frame (3) is provided with a four-bar linkage upper support arm (7). The four-bar linkage upper support arm (7) is provided with a furrowing disc pressure adjustment device (9) inside. One end of the seeder frame (3) is provided with a soil clod removal device (8) at the bottom. The sowing depth adjustment device (4) includes a first adjustment handle (401), a first cotter pin (402), a first compression spring (403), a hexagonal head circlip shaft (404), a sowing depth adjustment frame (405), a first felt plastic sleeve (406), an adjustment rib (407), a first washer (408), and a first shaft retaining ring (409). The first adjustment handle (401) is connected to the hexagonal head circlip shaft (404) through the first cotter pin (402). The hexagonal head circlip shaft (404) passes through the first compression spring (403) and the first felt plastic sleeve (406) in sequence and is then installed on the sowing depth adjustment frame (405). It is axially positioned by the first shaft retaining ring (409). The trenching disc pressure regulating device (9) includes a plastic support cover (901), a second shaft retaining ring (902), a second washer (903), a third compression spring (904), a plastic support (905), a cast adjustment unit (906), and a hinge bolt (907). The plastic support cover (901) has mounting holes. The hinge bolt (907) passes through the plastic support cover (901), the second shaft retaining ring (902), and the second washer (903) in sequence and is connected to the plastic support (905). The third compression spring (904) is fitted onto the hinge bolt (907) and is located between the plastic support (905) and the cast adjustment unit (906).

2. The seeding device with adjustable seeding depth according to claim 1, characterized in that: The pressure roller angle and pressure adjustment device (5) includes an M12 bolt (501), an M12 washer (502), an M12 bolt sleeve (503), an O-ring (504), a second felt-covered plastic sleeve (505), an M12 self-locking nut (506), an M10 bolt (507), an M10 washer (508), an M10 spacer sleeve (509), an M16 ordinary nut (510), an M16 locking washer (511), an M16 spacer sleeve (512), an M16 bolt (513), a second compression spring (514), a second cotter pin (515), a second adjustment handle (516), a compression tension spring (517), a knob adjustment handle (518), and a pressure roller adjustment bracket (519). The bolt (501) passes through the M12 washer (502), M12 bolt sleeve (503), O-ring (504), and second felt plastic sleeve (505) in sequence and is then tightened and positioned with the M12 self-locking nut (506). The M10 bolt (507) passes through the M10 washer (508) and M10 spacer sleeve (509) in sequence and is then fixed with the M16 ordinary nut (510) and M16 locking washer (511). The M16 bolt (513) passes through the M16 spacer sleeve (512) and pressure roller adjusting bracket (519) and is then fitted with the second compression spring (514) and fixed with the second cotter pin (515). The second adjusting handle (516) and knob adjusting handle (518) are mounted on the pressure roller adjusting bracket (519).

3. The seeding device with adjustable seeding depth according to claim 1, characterized in that: The soil removal device (8) includes a pin (801), a locking pin (802), an intermediate adjusting block (803), an M6 square neck bolt (804), an M6 self-locking nut (805), an M6 washer (806), and a soil remover (807). The pin (801) passes through the intermediate adjusting block (803) and is fixed by the locking pin (802). The M6 ​​square neck bolt (804) passes through the M6 ​​washer (806) and the intermediate adjusting block (803) in sequence and is then tightened with the M6 ​​self-locking nut (805).

4. The seeding device with adjustable seeding depth according to claim 1, characterized in that: The seed guide device (6) includes a stainless steel seed guide tube (601), a fixing rope (602), a gun barrel handle (603), a limiting sleeve (604), a shock-absorbing sleeve (605), and a Torx screw (606). The top end of the stainless steel seed guide tube (601) is connected to the bottom end of the seed box (1) through a pipe. The stainless steel seed guide tube (601) and the gun barrel handle (603) are connected by the fixing rope (602). The gun barrel handle (603), the limiting sleeve (604), and the shock-absorbing sleeve (605) are connected by the Torx screw (606). The bottom end of the stainless steel seed guide tube (601) is curved. A seed furrow forming device (16) is provided at the bottom of the stainless steel seed guide tube (601). An M8 self-locking washer (17) and an M8 hex bolt (18) are provided between the bottom of the stainless steel seed guide tube (601) and the seed furrow forming device (16).

5. The seeding device with adjustable seeding depth according to claim 1, characterized in that: The bottom of the seeder frame (3) is provided with a seed pressing wheel (12), a depth limiting wheel (13) and a furrowing disc (14). The depth limiting wheel (13) has a depth limiting wheel scraper (11) fixed on its rim by welding. The surface of the seed pressing wheel (12) is serrated. The outer side of the seed pressing wheel (12) is provided with a furrow forming device (16).

6. The seeding device with adjustable seeding depth according to claim 1, characterized in that: One end of the four-bar linkage upper support arm (7) is rotatably connected to the four-bar linkage lower support arm (10), and a grooved disc pressure spring (15) is provided between the four-bar linkage upper support arm (7) and the four-bar linkage lower support arm (10).

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