A height adjustable seed sowing assembly

Abstract

The utility model belongs to seeding apparatus technical field especially relates to a height adjustable seed sowing subassembly, including docking rack and plough head, one side of docking rack is connected with the stringing cross bar rotationally, a plurality of connecting rod structures are installed on the stringing cross bar, and the connecting rod structure that can be set up individually can individually tow corresponding plough head, when one of plough heads encounters an obstacle, under the action of corresponding connecting rod structure, the plough head can individually avoid the obstacle, and other plough heads keep the original working state and continue to work, when working, the first hook spring in the stretching state can continuously pull the plough head clamping seat, and ensure that the plough head always keeps the abutment state with the bottom of the dug ridge ditch.

Description

Technical Field

[0001] This utility model belongs to the field of seeding equipment technology, and in particular relates to a height-adjustable seed sowing component. Background Technology

[0002] In land ecological restoration operations, sowing typically involves using plows to dig furrows. Existing sowing equipment usually has multiple plows fixed to the same beam, allowing multiple furrows to be created simultaneously, improving efficiency. However, this method has drawbacks: when one plow encounters an obstacle such as a rock, the beam lifts it to avoid it. But this lifting of the beam also lifts all the plows attached to it, causing the remaining plows, which are not encountering obstacles, to also lift. This disrupts the normal operation of the plows that are not encountering obstacles. Furthermore, the frequent lifting and avoiding of obstacles by plows in different locations results in discontinuous furrows, affecting subsequent seed sowing. Utility Model Content

[0003] (a) Technical problems to be solved This invention addresses the problem in existing seeding equipment where, when the crossbeam moves one plow blade to avoid an obstacle, it simultaneously moves the other plow blades that are not encountering obstacles to avoid the obstacle as well, affecting the normal operation of the plow blades that are not encountering obstacles. Furthermore, the frequent lifting and avoidance of the entire system causes the multiple furrows to be opened to be intermittent, affecting subsequent seed sowing. Therefore, this invention provides a height-adjustable seed sowing component.

[0004] (II) Technical Content To achieve the above objectives, this utility model provides the following technical solution: A height-adjustable seed sowing assembly includes a docking frame and a plow head. A connecting crossbar is rotatably connected to one side of the docking frame. Multiple connecting rod structures are installed on the connecting crossbar. The connecting rod structures include side docking ears and plow head holders. The side docking ears are fixed to the connecting crossbar. The side of the connecting lug away from the connecting crossbar is rotatably connected to the upper connecting rod. The two sides of the side connecting lug are also symmetrically rotatably connected to the lower connecting rod. The upper connecting rod is parallel to the two lower connecting rods. A first hook spring is movably hung between the two lower connecting rods. The other end of the first hook spring is movably hung with the upper connecting rod. The plowshare holder is hollow inside. The end of the upper connecting rod away from the side abutment is rotatably connected to the inside of the plowshare holder, and the ends of the two lower connecting rods away from the side abutment are symmetrically rotatably connected to the two sides of the plowshare holder. A plowshare is fixedly inserted into the plowshare holder; A limiting sleeve is fixedly connected to the plowshare holder, and an L-shaped limiting rod is slidably connected to the limiting sleeve. The horizontally bent section of the limiting rod is located below the plowshare holder, and the end is rotatably connected to a support wheel via a bracket. The bottom of the plowshare holder abuts against the top of the horizontally bent section of the limiting rod. The top of the limiting rod extends out of the limiting sleeve, and a limiting nut is threadedly connected to the top end.

[0005] Furthermore, the upper link is located above the two lower links; The two lower connecting rods are fixedly connected to the same first connecting shaft, and the first connecting shaft is located on the side of the two lower connecting rods near the side docking ear. The bottom of the upper connecting rod away from the side docking ear is fixedly connected to a first hook spring holder. The same first hook spring is movably hung between the first connecting shaft and the first hook spring holder, and the first hook spring is in a stretched state.

[0006] Furthermore, the plowshare holder has a matching slot inside, and a matching rod is fixed to the top of the plowshare. The matching rod is inserted into the matching slot. Multiple pin through holes are correspondingly opened on the inner wall of the matching slot and the matching rod. Two pin through holes located at the same height on the inner wall of the matching slot and the matching rod are inserted with the same pin.

[0007] Furthermore, along the direction of travel of the seed-planting component, a seed-laying tube is fixed to the back of the plow.

[0008] Furthermore, it also includes a vibratory roller, and a roller bracket is rotatably connected to the end of the plowshare holder away from the upper connecting rod. The roller bracket is set at an inclination, and the high end of the roller bracket is rotatably connected to the plowshare holder, while the vibratory roller is rotatably connected to the low end of the roller bracket. Along the direction of travel of the seed-planting assembly, the vibratory roller is located directly behind the plowshare.

[0009] Furthermore, a second connecting shaft is fixedly connected to the bottom of one end of the plowshare holder near the roller bracket, and a second hook spring holder is fixedly connected to the bottom of the roller bracket. The same second hook spring is movably suspended between the second connecting shaft and the second hook spring holder, and the second hook spring is in a stretched state.

[0010] Furthermore, a gantry frame is integrally installed on the top of the docking frame, and a hydraulic telescopic rod is rotatably connected to the top of the gantry frame. A primary suspension arm is symmetrically rotatably connected to the bottom of the docking frame on the side away from the connecting crossbar. The same third connecting shaft is fixed between the two primary suspension arms. The telescopic end of the hydraulic telescopic rod is movably sleeved on the third connecting shaft. The two ends of the third connecting shaft extend from the two primary suspension arms respectively, and secondary suspension arms are rotatably connected to the two ends of the third connecting shaft respectively. The secondary suspension arms are arc-shaped. A suspension arm bracket is fixed to the top of the connecting crossbar, and the free ends of the two secondary suspension arms are rotatably connected to both sides of the suspension arm bracket respectively.

[0011] (III) Beneficial Effects Compared with the prior art, the beneficial effects of this utility model are as follows: I. In this utility model, while the first hook spring tightens the plowshare holder, it does not completely lock the plowshare holder. During the digging process, if a hard obstacle such as a stone blocks the bottom of the plow, after the plow comes into contact with the stone, as the plow moves forward, the stone will exert a reverse force on the plow. At this time, the corresponding plowshare holder will elastically lift along with the plow. When passing the obstacle, the limiting sleeve set on the plowshare holder slides upward along the vertical section of the limiting rod for a certain distance. At the same time, the first hook spring, which is in a stretched state, will be further stretched. After passing the obstacle, the first hook spring will pull the plowshare holder again, so that it abuts against the top of the horizontal bending section of the limiting rod again. At the same time, after passing the obstacle, the plow will also reset and continue to work. The linkage structure allows each plowshare to be pulled individually. When one plowshare encounters an obstacle, the linkage structure enables it to avoid the obstacle, while the other plowshares continue their original working state.

[0012] Second, in this utility model, during operation, the first hook spring, which is in a stretched state, can continuously tighten the plowshare holder, ensuring that the plowshare always remains in contact with the bottom of the dug furrow.

[0013] Third, in this utility model, the limiting rod can limit the plow head holder to prevent the plow head from sinking too much, which would cause the furrow to be dug too deep.

[0014] Fourth, in this utility model, the second hook spring in the tensioned state can continuously tighten the roller bracket to ensure that the vibrating roller always keeps in contact with the ground. As the seed sowing component moves forward, after the plow has opened the furrow and the seed has fallen into the furrow through the seed tube, the vibrating roller compacts and flattens the seed and the furrow during the forward movement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure in which the seed sowing component is fixedly connected to the external drive vehicle body and the external seed discharging device in this utility model. Figure 3 This is a diagram showing the working state of the plowshare when creating furrows in this utility model. Figure 4 This is a schematic diagram of the connecting rod structure in this utility model; Figure 5 This is an exploded view of the plowshare holder, the insert rod, and the pin in this utility model; Figure 6 This is a partial cross-sectional view of the limiting sleeve in this utility model; Figure 7 This is a schematic diagram of the structure of the plowshare holder, vibratory roller, and roller bracket in this utility model; Figure 8 This is a schematic diagram of the structure of the hydraulic telescopic rod, the first-stage suspension arm, the third connecting shaft, and the second-stage suspension arm in this utility model.

[0016] In the diagram: 11. Docking frame; 12. Connecting crossbar; 121. Suspension arm bracket; 111. Gantry frame; 21. Side docking lug; 2101. Pin through-hole; 22. Upper connecting rod; 23. Lower connecting rod; 231. First connecting shaft; 24. Plow head bracket; 2401. Alignment slot; 241. Second connecting shaft; 25. First hook spring bracket; 26. First hook spring; 27. Pin; 31. Plow Head; 311, Insertion rod; 41, Limiting sleeve; 42, Limiting rod; 421, Limiting nut; 43, Supporting wheel; 51, Vibration roller; 52, Roller bracket; 53, Second hook spring holder; 54, Second hook spring; 61, Hydraulic telescopic rod; 62, First-stage suspension arm; 621, Third connecting shaft; 63, Second-stage suspension arm; 71, Seeding tube; 81, Drive vehicle body; 91, Seed discharge device. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1 like Figures 1-8 As shown, a height-adjustable seed-planting assembly includes a docking frame 11 and a plow head 31. A connecting crossbar 12 is rotatably connected to one side of the docking frame 11, and multiple connecting rod structures are mounted on the connecting crossbar 12, such as... Figure 4 As shown, the linkage structure includes a side docking lug 21 and a plowshare holder 24, with the side docking lug 21 fixedly connected to the connecting crossbar 12. The side of the side connecting ear 21 away from the connecting crossbar 12 is rotatably connected to the upper connecting rod 22. The two sides of the side connecting ear 21 are also symmetrically rotatably connected to the lower connecting rods 23. The upper connecting rod 22 is parallel to the two lower connecting rods 23. The first hook spring 26 is movably hung between the two lower connecting rods 23. The other end of the first hook spring 26 is movably hung with the upper connecting rod 22. The plowshare holder 24 is hollow inside. The end of the upper connecting rod 22 away from the side abutment 21 is rotatably connected to the inside of the plowshare holder 24. The ends of the two lower connecting rods 23 away from the side abutment 21 are symmetrically rotatably connected to the two sides of the plowshare holder 24. A plowshare 31 is fixedly inserted into the plowshare holder 24; like Figure 2 As shown, during use, the seed sowing component can be fixed to the external drive vehicle 81 through the docking frame 11. The drive vehicle 81 is commonplace, and its working principle will not be described in detail here. The docking frame 11 moves forward together with the external drive vehicle 81. A furrow for sowing can be opened in the soil through the plow head 31. The set linkage structure can independently pull the corresponding plow head 31. When one plow head 31 encounters an obstacle, the plow head 31 can avoid the obstacle under the action of the corresponding linkage structure, while the other plow heads 31 maintain their original working state.

[0019] Furthermore, such as Figure 4 As shown, the upper link 22 is located above the two lower links 23; The same first connecting shaft 231 is fixed between the two lower connecting rods 23, and the first connecting shaft 231 is located on the side of the two lower connecting rods 23 near the side docking ear 21. The bottom of the upper connecting rod 22 away from the side docking ear 21 is fixed with a first hook spring seat 25. The same first hook spring 26 is movably hung between the first connecting shaft 231 and the first hook spring seat 25. The first hook spring 26 is in a stretched state. Furthermore, such as Figure 5 As shown, the plowshare holder 24 has a matching slot 2401 inside, and the top of the plowshare 31 is fixedly connected to a matching rod 311. When installing the plowshare 31, the matching rod 311 is inserted into the matching slot 2401. The inner wall of the matching slot 2401 and the matching rod 311 are respectively provided with multiple pin through holes 2101. Two pin through holes 2101 located at the same height on the inner wall of the matching slot 2401 and the matching rod 311 are connected to the same pin 27. The matching rod 311 can be locked and fixed to the plowshare holder 24 through the pin 27. The operator can adjust the vertical height of the plowshare 31 according to the desired furrow depth. When adjusting, first pull out the pin 27, and then drive the matching rod 311 to move vertically up and down along the matching slot 2401 according to the target furrow depth. After the adjustment is completed, the pin 27 can be reinserted into the corresponding pin through hole 2101.

[0020] Specifically, during operation, the first hook spring 26, which is in a stretched state, can continuously tighten the plowshare holder 24 to ensure that the plowshare 31 always remains in contact with the bottom of the dug furrow. Combination Figures 3-6A limiting sleeve 41 is fixedly connected to the plowshare holder 24. An L-shaped limiting rod 42 is slidably connected to the limiting sleeve 41. The horizontally bent section of the limiting rod 42 is located below the plowshare holder 24, and the end is rotatably connected to a support wheel 43 via a bracket. The bottom of the plowshare holder 24 abuts against the top of the horizontally bent section of the limiting rod 42. The top of the limiting rod 42 extends out of the limiting sleeve 41, and the top end is threadedly connected to a limiting nut 421. When installing the support roller 43, insert the top of the limiting rod 42 along the bottom of the limiting sleeve 41. After the top of the limiting rod 42 extends out of the limiting sleeve 41, thread a limiting nut 421 onto the top of the limiting rod 42. The limiting nut 421 can limit the top of the limiting rod 42 to prevent the limiting rod 42 from slipping out of the limiting sleeve 41.

[0021] During operation, the support roller 43 contacts the ground, and the plow head 31 penetrates the soil under the tension of the first hook spring 26. As the plow head 31 moves downward, the limiting sleeve 41 set on the plow head holder 24 also slides downward along the vertical section of the limiting rod 42. When the bottom of the plow head holder 24 abuts against the top of the horizontal bend of the limiting rod 42, the ground will exert a reverse force on the plow head holder 24 through the support roller 43 and the limiting rod 42, preventing the plow head 31 from descending and preventing it from sinking too much, which would cause the furrow to be dug too deep.

[0022] While the first hook spring 26 tightens the plowshare holder 24, it does not completely lock the plowshare holder 24. During the digging process, if a hard obstacle such as a stone blocks the bottom of the plowshare 31, after the plowshare 31 comes into contact with the stone, the stone will exert a reverse force on the plowshare 31 as it moves forward. At this time, the corresponding plowshare holder 24 will elastically lift together with the plowshare 31. When it passes the obstacle, the limiting sleeve 41 set on the plowshare holder 24 slides upward along the vertical section of the limiting rod 42 for a certain distance. At the same time, the first hook spring 26, which is in a stretched state, will be further stretched. After passing the obstacle, the first hook spring 26 will pull the plowshare holder 24 again, so that it abuts against the top of the horizontal bending section of the limiting rod 42 again. At the same time, after passing the obstacle, the plowshare 31 will also reset and continue to work.

[0023] Furthermore, such as Figure 1 , Figure 3 and Figure 5 As shown, along the direction of travel of the seed sowing assembly, a seed tube 71 is fixed to the back of the plow head 31, which delivers the seeds into the seed tube 71 and sows the seeds into the furrows along the seed tube 71. Among them, such as Figure 2As shown, the staff can install an external seed dispensing device 91 on the external drive vehicle body 81. While the plow 31 is opening furrows, the external seed dispensing device 91 automatically sends the seeds to the seeding pipe 71 through the conveying pipe, thereby sowing the seeds in the furrows. Furthermore, such as Figure 2 , Figure 3 and Figure 7 As shown, the seed sowing assembly also includes a vibrating roller 51. The end of the plowshare holder 24 away from the upper connecting rod 22 is rotatably connected to a roller bracket 52. The roller bracket 52 is inclined, and the high end of the roller bracket 52 is rotatably connected to the plowshare holder 24. The vibrating roller 51 is rotatably connected to the low end of the roller bracket 52. Along the direction of travel of the seed sowing assembly, the vibratory roller 51 is located directly behind the plow head 31.

[0024] Furthermore, a second connecting shaft 241 is fixedly connected to the bottom of the plowshare holder 24 near the roller bracket 52, and a second hook spring holder 53 is fixedly connected to the bottom of the roller bracket 52. The same second hook spring 54 is movably hung between the second connecting shaft 241 and the second hook spring holder 53, and the second hook spring 54 is in a stretched state.

[0025] During operation, the second hook spring 54, which is in a stretched state, can continuously tighten the roller bracket 52 to ensure that the vibrating roller 51 always keeps in contact with the ground. As the seed sowing assembly moves forward, after the plow head 31 has opened the furrows and the seeds have fallen into the furrows through the seed tube 71, the vibrating roller 51 compacts and flattens the seeds and furrows during its forward movement.

[0026] Furthermore, such as Figure 1 , Figure 3 and Figure 8 As shown, a gantry frame 111 is integrally provided on the top of the docking frame 11. A hydraulic telescopic rod 61 is rotatably connected to the top of the gantry frame 111. A primary suspension arm 62 is symmetrically rotatably connected to the bottom of the docking frame 11 on the side away from the connecting crossbar 12. The same third connecting shaft 621 is fixed between the two primary suspension arms 62. The telescopic end of the hydraulic telescopic rod 61 is movably sleeved on the third connecting shaft 621. The two ends of the third connecting shaft 621 extend from the two primary suspension arms 62 respectively, and the two ends of the third connecting shaft 621 are rotatably connected to the secondary suspension arms 63 respectively. The secondary suspension arms 63 are arc-shaped. A suspension arm bracket 121 is fixedly connected to the top of the connecting crossbar 12. The free ends of the two secondary suspension arms 63 are rotatably connected to the two sides of the suspension arm bracket 121 respectively.

[0027] After the work is completed, control the hydraulic telescopic rod 61 to extend the telescopic end of the hydraulic telescopic rod 61. At the same time, the telescopic end of the hydraulic telescopic rod 61 will push the first-stage suspension arm 62 through the third connecting shaft 621. At this time, the first-stage suspension arm 62 will rotate counterclockwise by a certain angle. While the first-stage suspension arm 62 is rotating, it will also pull the connecting crossbar 12 through the second-stage suspension arm 63, so that it will also rotate counterclockwise along the docking frame 11, thereby lifting the connecting rod structure and plow head 31 set on the connecting crossbar 12, so that the external drive vehicle 81 can drive away with the seed sowing component.

[0028] The primary suspension arm 62 and the secondary suspension arm 63 can raise the tandem crossbar 12 higher. If the telescopic end of the hydraulic telescopic rod 61 is directly fixed to the suspension arm bracket 121, when the telescopic end of the hydraulic telescopic rod 61 pulls the tandem crossbar 12 to raise it through the suspension arm bracket 121, the travel of the telescopic end of the hydraulic telescopic rod 61 when it drives the suspension arm bracket 121 to move is limited because the hydraulic telescopic rod 61 itself occupies a certain space. This results in a limited lifting height of the tandem crossbar 12.

[0029] In summary, the workflow of this utility model is as follows: Before operation, the seed sowing assembly is fixed to the external drive vehicle 81 via the docking frame 11, and an external seed discharge device 91 is installed on the external drive vehicle 81. The discharge port of the external seed discharge device 91 is connected to the seeding pipe 71. During operation, the docking frame 11 moves forward together with the external drive vehicle 81. A furrow for sowing can be opened in the soil via the plow head 31. During the digging process, if a hard obstacle such as a stone obstructs the bottom of one of the plow heads 31, after the plow head 31 comes into contact with the stone, as the plow head 31 moves forward, the stone will exert a reverse force on the plow head 31. At this time, the corresponding plow head holder 24 will be connected together with the stone. The plow head 31 is elastically raised together. When it passes over an obstacle, the limiting sleeve 41 set on the plow head holder 24 slides upward along the vertical section of the limiting rod 42 for a certain distance. At the same time, the first hook spring 26, which is in a stretched state, will be further stretched. After passing over the obstacle, the first hook spring 26 will pull the plow head holder 24 again, so that it abuts against the top of the horizontal bending section of the limiting rod 42 again. At the same time, after passing over the obstacle, the plow head 31 will also reset and continue to work. While the plow head 31 is opening furrows, the external seed discharge device 91 automatically sends the seeds to the seeding pipe 71 through the conveying pipe and sows the seeds into the furrows. The vibrating roller 51 compacts and flattens the seeds and furrows during the forward movement. After the work is completed, control the hydraulic telescopic rod 61 to extend the telescopic end of the hydraulic telescopic rod 61. At the same time, the telescopic end of the hydraulic telescopic rod 61 will push the first-stage suspension arm 62 through the third connecting shaft 621. At this time, the first-stage suspension arm 62 will rotate counterclockwise by a certain angle. While the first-stage suspension arm 62 is rotating, it will also pull the connecting crossbar 12 through the second-stage suspension arm 63, so that it will also rotate counterclockwise along the docking frame 11, thereby lifting the connecting rod structure and plow head 31 set on the connecting crossbar 12, so that the external drive vehicle 81 can drive away with the seed sowing component.

[0030] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive vehicle body 81, the seed discharging device 91, and the hydraulic telescopic rod 61 are commonplace and belong to conventional means or common knowledge. Therefore, they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable seed sowing assembly, characterized in that: It includes a docking frame (11) and a plow (31). A connecting crossbar (12) is rotatably connected to one side of the docking frame (11). Multiple connecting rod structures are installed on the connecting crossbar (12). The connecting rod structures include a side docking lug (21) and a plow holder (24). The side docking lug (21) is fixed to the connecting crossbar (12). The side of the side connecting lug (21) away from the connecting crossbar (12) is rotatably connected to the upper connecting rod (22). The two sides of the side connecting lug (21) are also symmetrically rotatably connected to the lower connecting rods (23). The upper connecting rod (22) is parallel to the two lower connecting rods (23). The first hook spring (26) is movably hung between the two lower connecting rods (23). The other end of the first hook spring (26) is movably hung with the upper connecting rod (22). The plowshare holder (24) is hollow inside. The end of the upper connecting rod (22) away from the side abutment (21) is rotatably connected to the inside of the plowshare holder (24). The ends of the two lower connecting rods (23) away from the side abutment (21) are symmetrically rotatably connected to the two sides of the plowshare holder (24). A plowshare (31) is fixedly inserted into the plowshare holder (24); A limiting sleeve (41) is fixedly connected to the plowshare holder (24). An L-shaped limiting rod (42) is slidably connected to the limiting sleeve (41). The horizontal bend of the limiting rod (42) is located below the plowshare holder (24), and the end is rotatably connected to a support wheel (43) via a bracket. The bottom of the plowshare holder (24) abuts against the top of the horizontal bend of the limiting rod (42). The top of the limiting rod (42) extends out of the limiting sleeve (41), and the top end is threaded with a limiting nut (421).

2. The height-adjustable seed-planting assembly according to claim 1, characterized in that: The upper link (22) is located above the two lower links (23); The two lower connecting rods (23) are fixedly connected to the same first connecting shaft (231), and the first connecting shaft (231) is located on the side of the two lower connecting rods (23) near the side docking ear (21). The bottom of the upper connecting rod (22) away from the side docking ear (21) is fixedly connected to a first hook spring holder (25). The same first hook spring (26) is movably hung between the first connecting shaft (231) and the first hook spring holder (25), and the first hook spring (26) is in a stretched state.

3. The height-adjustable seed-planting assembly according to claim 2, characterized in that: The plowshare holder (24) is provided with a matching slot (2401) inside. The top of the plowshare (31) is fixed with a matching rod (311). The matching rod (311) is inserted into the matching slot (2401). Multiple pin through holes (2101) are correspondingly opened on the inner wall of the matching slot (2401) and the matching rod (311). Two pin through holes (2101) located on the inner wall of the matching slot (2401) and the matching rod (311) at the same height are connected to the same pin (27).

4. The height-adjustable seed-planting assembly according to claim 3, characterized in that: Along the direction of travel of the seed sowing assembly, a seed tube (71) is fixed to the back of the plow (31).

5. The height-adjustable seed-planting assembly according to claim 4, characterized in that: It also includes a vibratory roller (51), and a roller bracket (52) is rotatably connected to the end of the plowshare holder (24) away from the upper connecting rod (22). The roller bracket (52) is inclined and the high end of the roller bracket (52) is rotatably connected to the plowshare holder (24). The vibratory roller (51) is rotatably connected to the low end of the roller bracket (52). Along the direction of travel of the seed sowing assembly, the vibratory roller (51) is located directly behind the plowshare (31).

6. The height-adjustable seed-planting assembly according to claim 5, characterized in that: The plowshare holder (24) has a second connecting shaft (241) fixedly connected to the bottom of one end near the roller bracket (52), and a second hook spring holder (53) is fixedly connected to the bottom of the roller bracket (52). The same second hook spring (54) is movably hung between the second connecting shaft (241) and the second hook spring holder (53), and the second hook spring (54) is in a stretched state.

7. The height-adjustable seed-planting assembly according to claim 1, characterized in that: The top of the docking frame (11) is integrally provided with a gantry frame (111), and the top of the gantry frame (111) is rotatably connected with a hydraulic telescopic rod (61). The bottom of the docking frame (11) away from the side of the connecting crossbar (12) is symmetrically rotatably connected with a first-stage suspension arm (62). The two first-stage suspension arms (62) are fixedly connected to the same third connecting shaft (621). The telescopic end of the hydraulic telescopic rod (61) is movably sleeved on the third connecting shaft (621). The two ends of the third connecting shaft (621) extend from the two first-stage suspension arms (62) respectively, and the two ends of the third connecting shaft (621) are rotatably connected to a second-stage suspension arm (63). The second-stage suspension arm (63) is arc-shaped. The top of the connecting crossbar (12) is fixedly connected with a suspension arm bracket (121), and the free ends of the two second-stage suspension arms (63) are rotatably connected to the two sides of the suspension arm bracket (121).

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