Mechanical structure for covering soil on film and agricultural seeding machine

Abstract

The utility model discloses a mechanical structure for covering soil on a film, which belongs to the technical field of agricultural seeding machines, solves the problem that a soil covering mechanical structure in the prior art is easy to block and is frequently shut down for cleaning, and adopts the technical scheme that the mechanical structure mainly comprises a traction frame, and two transverse sides of the traction frame are respectively provided with a soil shifting component; a soil blocking component is further arranged on the traction frame and located between the two soil shifting components, the soil blocking component and the soil shifting components are arranged at intervals to form a film covering soil channel, a soil guiding component is arranged at the downstream position of the soil blocking component, and a distance is kept between the bottom of the soil guiding component and the upper surface of a film to limit the maximum height of film covering soil. The soil guide component is obliquely arranged towards the outside of the film towards one side deviating from the advancing direction, so that soil exceeding the preset soil covering height is guided out of the film. According to the utility model, the blockage of a soil covering mechanical structure is mainly and effectively reduced, the frequency of shutdown cleaning is reduced, and the working efficiency is improved. The utility model also aims to disclose an agricultural seeding machine.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural seeding machines, in particular to a soil covering mechanical structure on a film and an agricultural seeding machine. Background Art

[0002] In the prior art, the mechanical structure of covering soil on the film of agricultural seeders, such as utility model patents CN206744081U, CN220326392U and CN213187431U, etc., all use disks on both sides to guide the soil into the drum, and then leak out from the drum outlet to spread the soil on the film. The outer ring of the drum is at a certain distance from the surface of the film. When large rhizomes are planted for a long time, the large rhizomes in the cultivated land cannot be completely cleaned up and still remain in the land without being decomposed. Therefore, when the drum structure is used for covering soil, the large rhizomes are transported into the drum and cannot be discharged from the drum outlet and remain in the drum body, which easily causes the outlet to be blocked, affecting the amount of soil discharged. Frequent shutdowns are required to take out the large rhizomes for cleaning, affecting the working efficiency. Utility Model Content

[0003] The purpose to be achieved by the utility model is to provide a soil covering mechanical structure on the membrane, which solves the problem in the prior art that the soil covering mechanical structure is easily blocked and frequently shut down for cleaning, effectively reduces the occurrence of blockage of the soil covering mechanical structure, reduces the number of shutdowns for cleaning, and improves operating efficiency.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mechanical structure for covering soil on the membrane, including a traction frame, each of the lateral sides of the traction frame is provided with a soil-moving component that can move soil to the upper surface of the membrane, and a soil retaining component is also provided on the traction frame between the two soil-moving components, the bottom of the soil retaining component can contact the upper surface of the membrane, the soil retaining component and the soil-moving component are spaced apart to form a soil-covering channel on the membrane, a soil guiding component is provided at the downstream position of the soil retaining component, the bottom of the soil guiding component maintains a distance from the upper surface of the membrane to limit the maximum height of the soil covering on the membrane, and the soil guiding component is inclined toward the side away from the forward direction toward the outside of the membrane to guide soil exceeding the preset soil covering height to the outside of the membrane.

[0005] After adopting the above technical scheme, the utility model has the following advantages: first, by arranging the soil-moving component and the soil-retaining component, the bottom of the soil-retaining component can contact with the upper surface of the membrane, and the soil-retaining component and the soil-moving component are arranged at intervals to form a soil-covering channel on the membrane, so that the soil can be directly covered on the upper surface of the membrane, and the soil-covering channel on the membrane is open, so there is no problem of large rhizomes entering the closed channel (such as the roller in the prior art) and causing blockage during the entire soil transportation process, thereby reducing the number of shutdowns for cleaning and improving work efficiency. Secondly, the bottom of the soil-guiding component maintains a distance from the upper surface of the membrane to limit the maximum height of the soil covering on the membrane, which is conducive to making the soil covering thickness more uniform and consistent, thereby facilitating crop growth. Finally, the soil-guiding component is arranged to be inclined toward the outside of the membrane on the side away from the forward direction, so as to guide the soil exceeding the preset soil covering height to the outside of the membrane. Correspondingly, large rhizomes can also be guided to the outside of the membrane, reducing the large rhizomes remaining on the surface of the membrane, thereby reducing the damage to agricultural machinery during subsequent tillage.

[0006] Furthermore, two soil retaining members are provided, and the two soil retaining members can be fixed at different positions on the left and right sides of the traction frame, so that the spacing distance between the soil retaining member and the soil expelling member can be changed.

[0007] By adopting the above-mentioned technical solution, by adjusting the position of the soil retaining member, the width of the soil covering channel on the membrane can be adjusted according to actual needs, thereby adapting to the soil covering requirements of different membranes and crop planting needs.

[0008] Furthermore, the soil guiding member can be fixed at different positions of the soil retaining member along the height direction of the traction frame, so that the distance between the bottom of the soil retaining member and the upper surface of the membrane can be changed.

[0009] By adopting the above-mentioned technical solution, the maximum height of the covering soil layer can be changed by adjusting the position of the soil-guiding component, thereby adapting to the requirements of different crop planting and changes in soil conditions, and can also further reduce the blockage of large rhizomes between the bottom of the retaining component and the upper surface of the membrane.

[0010] Furthermore, it comprises a plurality of soil guiding members with different inclination angles, and the soil guiding members and the soil retaining members are detachably connected.

[0011] By adopting the above-mentioned technical solution, by replacing soil guide components with different inclination angles and accurately controlling the inclination angle of the soil guide components, the flow direction of the soil can be optimized, thereby better adapting to different film widths and crop planting requirements, and large rhizomes can be discharged more smoothly outside the film.

[0012] Furthermore, the soil retaining member is movably connected to the traction frame through a connecting rod mechanism, so that the soil retaining member swings along with the ups and downs of the upper surface of the membrane.

[0013] By adopting the above-mentioned technical solution, through the movable connection of the connecting rod mechanism, the retaining components can swing according to the ups and downs of the upper surface of the membrane caused by soil conditions and terrain changes, so that the retaining components can adapt to different soil hardnesses and ground ups and downs, ensuring stable contact without damaging the membrane, helping to reduce the hard contact between the retaining components and the membrane, and reducing the possibility of wear and damage.

[0014] Furthermore, the retaining member includes a blocking plate arranged along the height direction of the traction frame and a film pressing plate arranged along the transverse direction of the traction frame, the blocking plate and the film pressing plate are fixedly connected, and the film pressing plate is located at the bottom of the blocking plate and is in sliding contact with the upper surface of the film.

[0015] By adopting the above technical scheme, the blocking plate arranged along the height direction of the traction frame can effectively intercept the soil and large rhizomes in the soil, thereby limiting the soil covering range on the membrane. Secondly, the film pressing plate arranged along the horizontal direction of the traction frame increases the contact area with the film pressing plate, so that the force on each part of the membrane is more uniform, and the soil and large rhizomes in the soil can be further intercepted. Finally, compared with rolling contact, the sliding contact has a more uniform pressure on the membrane, further reducing the damage to the membrane.

[0016] Furthermore, the connecting rod mechanism includes a first connecting rod and a second connecting rod located above the first connecting rod, the head end of the first connecting rod and the head end of the second connecting rod are both hinged on the same side of the traction frame, the tail end of the first connecting rod is hinged on the film pressing plate, the blocking plate is provided with a movable hole arranged along the longitudinal direction of the traction frame, and the tail end of the second connecting rod is slidably arranged in the movable hole, allowing the blocking plate and the film pressing plate to swing relative to the traction frame.

[0017] By adopting the above technical scheme, since the blocking plate and the film pressing plate are fixedly connected and swing synchronously with each other, a four-link design is formed by the first connecting rod, the second connecting rod, the traction frame, the blocking plate and the film pressing plate. The tail end of the second connecting rod slides in the movable hole, which can drive the first connecting rod to move, so that the contact angle of the film pressing plate relative to the film changes. The film pressing plate can automatically adjust its contact angle with the film according to soil conditions and terrain changes, and can also ensure that the film pressing plate and the film always maintain proper contact, thereby reducing gaps or overpressure during the covering process.

[0018] Furthermore, a limiting member is provided on the blocking plate, and the limiting member is located above the second connecting rod to limit the upward swinging range of the rear end of the soil retaining component.

[0019] By adopting the above technical solution, the limiter limits the upward swinging amplitude of the rear end of the soil retaining member, thereby preventing the blocking plate and the film pressing plate from flipping after being lifted into the air when the mechanical structure of covering the soil on the film turns.

[0020] Furthermore, the soil guiding member is fixed on a blocking plate, and the blocking plate is located on a side of the film pressing plate close to the soil expelling member.

[0021] With the above technical solution, the retaining plate is arranged on the side close to the soil-scraping member, which can more directly guide the soil flow and also reduce the accumulation of soil on the film pressing plate, effectively avoiding the situation that the film is damaged due to excessive pressure of the film pressing plate on the film.

[0022] Another object of the present utility model is to disclose an agricultural seeder, including a machine body. A hill-drop seeder is provided at the front part of the machine body, and a mechanical structure for covering soil on the film is provided at the rear part of the machine body. The mechanical structure for covering soil on the film is the mechanical structure for covering soil on the film according to any one of the above technical solutions, and the hill-drop seeder is located in front of the soil-covering channel on the film.

[0023] With the above technical solution, the design that the hill-drop seeder is located in front of the soil-covering channel helps the seeds under the film to be effectively covered by soil, helps to improve the quality of soil covering, enables the sowing and soil-covering operations to be carried out continuously, reduces the waiting time between operation links, improves the overall operation efficiency, and the soil-scraping member, soil-retaining member and soil-guiding member can also be adjusted according to the sowing position of the hill-drop seeder, improving the adaptability of the machine. Description of the Drawings

[0024] The present utility model will be further described below with reference to the drawings:

[0025] Figure 1 It is a schematic structural view of the mechanical structure for covering soil on the film in Embodiment 1 of the present utility model;

[0026] Figure 2 It is an exploded view of the mechanical structure for covering soil on the film in Embodiment 1 of the present utility model;

[0027] Figure 3 It is a partial schematic structural view of the mechanical structure for covering soil on the film in Embodiment 1 of the present utility model;

[0028] Figure 4 It is a schematic structural view of the soil-retaining member and soil-guiding member in Embodiment 1 of the present utility model;

[0029] Figure 5 It is a top view of the soil-retaining member and soil-guiding member in Embodiment 1 of the present utility model;

[0030] Figure 6 It is a side view of the soil-retaining member and soil-guiding member in Embodiment 1 of the present utility model;

[0031] Figure 7 It is a front view of the soil-retaining member and soil-guiding member in Embodiment 1 of the present utility model;

[0032] Figure 8 It is a schematic structural view of the film of the mechanical structure for covering soil on the film in Embodiment 1 of the present utility model at a first angle;

[0033] Figure 9 This is a schematic diagram of the structure of the film with soil covering on the film in the first embodiment of the present utility model at a second angle;

[0034] Figure 10 This is a schematic diagram of the structure of the film with soil covering on the film in the first embodiment of the present utility model at a third angle;

[0035] Figure 11 This is an exploded view of the soil retaining member and the soil guiding member in the first embodiment of the present utility model;

[0036] Figure 12 This is a schematic diagram of the structure of the agricultural seeder in the second embodiment of the present utility model;

[0037] In the figure, 100, body; 101, mounting rod; 102, towing rod; 103, connecting member; 104, spring; 105, first connecting sleeve; 106, hill-drop drill; 110, soil covering channel on the film; 200, soil scraping member; 201, soil scraping plate; 202, first connecting rod; 203, second connecting rod; 204, third connecting sleeve; 300, soil retaining member; 301, blocking plate; 302, film pressing plate; 303, first link; 304, second link; 305, movable hole; 306, limit screw; 307, mounting hole; 308, second connecting sleeve; 400, soil guiding member; 401, strip hole; 402, bolt; 403, nut; 500, film; 600, seeds; 700, soil. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model.

[0039] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein.

[0040] It should be understood that in various embodiments of the present utility model, such as the size of the serial numbers of each process, it does not mean the sequence of execution is prior or subsequent. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present utility model.

[0041] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0042] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0043] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0044] Embodiment 1:

[0045] like Figures 1 to 11 As shown, the utility model provides a mechanical structure for covering soil on a membrane, including a traction frame, wherein a soil-moving component 200 capable of moving soil 700 to the upper surface of a membrane 500 is respectively provided on both lateral sides of the traction frame, and a soil-retaining component 300 is also provided between the two soil-moving components 200 on the traction frame, and the bottom of the soil-retaining component 300 can contact the upper surface of the membrane 500, and the soil-retaining component 300 and the soil-moving component 200 are spaced apart to form a soil-covering channel 110 on the membrane, and a soil-guiding component 400 is provided at a downstream position of the soil-retaining component 300, and the bottom of the soil-guiding component 400 maintains a distance from the upper surface of the membrane 500 to limit the maximum height of the soil covering on the membrane 500, and the soil-guiding component 400 is inclinedly arranged toward the side away from the advancing direction toward the outside of the membrane 500 to guide the soil 700 exceeding the preset soil covering height to the outside of the membrane 500.

[0046] In this embodiment, the soil-moving member 200 and the soil-retaining member 300 are arranged, and the bottom of the soil-retaining member 300 can contact the upper surface of the membrane 500. The soil-retaining member 300 and the soil-moving member 200 are arranged at intervals to form a soil-covering channel 110 on the membrane, so that the soil 700 can be directly covered on the upper surface of the membrane 500. The soil-covering channel 110 on the membrane is open, so there is no problem of large rhizomes entering the closed channel (such as the roller in the prior art) and causing blockage during the entire transportation process of the soil 700, thereby reducing the number of shutdowns for cleaning and improving the working efficiency. , the bottom of the soil guide member 400 maintains a distance from the upper surface of the membrane 500 to limit the maximum height of the soil covering the membrane 500, which is conducive to making the soil covering thickness more uniform, thereby facilitating crop growth. Finally, the soil guide member 400 is arranged to be inclined toward the side away from the forward direction toward the outside of the membrane 500 to guide the soil 700 exceeding the preset soil covering height to the outside of the membrane 500. Correspondingly, large rhizomes can also be guided to the outside of the membrane 500, reducing the large rhizomes remaining on the surface of the membrane 500, thereby reducing damage to agricultural machinery during subsequent farming.

[0047] It should be noted that the soil covering mechanical structure on the membrane in this embodiment is mainly suitable for covering two rows of a single membrane 500, and is mainly used to cover the seeds 600 under the membrane 500. The end of the soil guide component 400 extends outside the membrane 500. When the soil covering mechanical structure on the membrane moves forward, the soil 700 exceeding the preset soil covering height is guided along the soil guide component 400 to the outside of the membrane 500.

[0048] Since different crops are located at different positions on the membrane 500, in the present embodiment, two soil retaining members 300 are provided. The two soil retaining members 300 can be fixed at different positions on both sides of the traction frame. By adjusting the position of the soil retaining member 300, the spacing distance between the soil retaining member 300 and the soil shifting member 200 is changed, so that the width of the soil covering channel 110 on the membrane can be adjusted according to actual needs, so as to adapt to the soil 700 covering requirements and crop planting needs of different membranes 500. The flexible adjustment capability helps to reduce the problem of soil 700 blockage. For example, a smaller spacing distance can be selected for crops with shallow roots, while a larger spacing distance can be selected for crops with deep roots or requiring more soil 700 coverage. It can also reduce the wear of mechanical parts caused by frequent cleaning, thereby reducing maintenance costs.

[0049] Specifically, the towing frame includes a horizontally arranged mounting rod 101 and a vertically arranged towing rod 102. The towing rod 102 is also provided with a connecting member 103 and a spring 104. One end of the towing rod 102 is connected to the middle position of the mounting rod 101 through a first connecting sleeve 105 to form a T-shaped structure. The structure is relatively light and stable, with relatively low production costs and convenient disassembly, making the weight distribution of the entire mechanical structure more balanced and enabling stable operation under various terrain conditions, especially when operating on uneven ground. The retaining member 300 is provided with a second connecting sleeve 308. The second connecting sleeve 308 is sleeved on the mounting rod 101 and can slide relative to the mounting rod 101. After the second connecting sleeve 308 moves to the set position, it can be fixed by screws, thereby changing the spacing distance between the retaining member 300 and the soil-scraping member 200. The other end of the towing rod 102 is rotatably connected to the connecting member 103 and is connected by bolts to control the clearance of the horizontal left and right swing of the towing frame. The spring 104 extends along the length direction of the towing rod 102. One end of the spring 104 is connected to the middle position of the towing rod 102, and the other end of the spring 104 is connected to the connecting member 103. The spring 104 pre-tightens between the connecting member 103 and the towing rod 102, thereby restricting the fluctuation of the mounting rod 101 and the soil-scraping member 200 mounted on the mounting rod 101 and keeping the soil-scraping member 200 always downward. The towing rod 102 needs to overcome the pre-tightening force of the spring 104 when swinging, and the pre-tightening force is relatively large. Even on uneven ground, the force of the soil-scraping member 200 on the spring 104 is still less than the pre-tightening force of the spring 104, thereby ensuring the soil-taking effect of the soil-scraping member 200.

[0050] Since the covering soil thickness of different crops is different, in this embodiment, the soil guiding member 400 can be fixed at different positions of the retaining member 300 along the height direction of the towing frame. By adjusting the position of the soil guiding member 400, the distance between the bottom of the retaining member 300 and the upper surface of the film 500 can be changed, and the maximum height of the covering soil layer can be changed, so as to adapt to the requirements of different crop plantings and the changes in soil 700 conditions. For example, for shallow-root crops, a smaller covering soil thickness can be selected, while for deep-root crops, a larger covering soil thickness can be selected. Precise control of the covering soil thickness helps to reduce the problem of soil 700 blockage and reduce the wear of mechanical components caused by frequent cleaning, thereby reducing the maintenance cost.

[0051] Specifically, the soil guiding member 400 is provided with a strip-shaped hole 401 extending along the height direction of the towing frame, and the retaining member 300 is provided with a mounting hole 307. The bolt 402 first passes through the strip-shaped hole 401 and then through the mounting hole 307. After adjusting the position of the bolt 402 in the strip-shaped hole 401, it is fixed by a nut 403, so that the soil guiding member 400 is fixed at the set height position of the retaining member 300.

[0052] Furthermore, the soil guiding member 400 can be fixed at different positions of the soil retaining member 300 along the horizontal direction of the traction frame, so as to change the inclination angle of the soil guiding member 400 towards the outside of the film 500. By precisely controlling the inclination angle of the soil guiding member 400, the flow direction of the soil 700 can be optimized, so as to better adapt to different film 500 widths and crop planting requirements.

[0053] In this embodiment, the soil retaining member 300 is mainly arranged longitudinally along the traction frame to limit the coverage range of the soil 700 on the film 500. A plurality of soil guiding members 400 can be provided, and the inclination angles of the plurality of soil guiding members 400 are different. According to actual needs, the soil guiding member 400 with the corresponding inclination angle can be installed on the soil retaining member 300. The soil guiding member 400 can be a diversion plate. When the soil covering mechanism on the film moves forward, the soil 700 exceeding the preset soil covering height is led out of the film 500 along the surface of the diversion plate.

[0054] Furthermore, the soil pushing member 200 can be fixed at different heights of the traction frame to change the amount of soil pushed, and push the corresponding amount of soil 700 onto the film 500. In addition, the soil pushing member 200 can also rotate relative to the traction frame to change the inclination angle of the soil pushing member 200 relative to the film 500, so as to further change the amount of soil pushed, and can also change the position where the soil 700 is pushed into the film 500.

[0055] Specifically, the soil pushing member 200 includes a soil pushing disc 201, a first connecting rod 202, a second connecting rod 203 and a third connecting sleeve 204. The first connecting rod 202 is of a hollow structure. The second connecting rod 203 is sleeved on the first connecting rod 202. The first connecting rod 202 is fixedly connected to the soil pushing disc 201. The second connecting rod 203 is fixedly connected to the third connecting sleeve 204. The second connecting rod 203 moves up and down relative to the first connecting rod 202 to change the height of the soil pushing disc 201. The second connecting rod 203 rotates relative to the first connecting rod 202 to change the angle of the soil pushing disc 201. The third connecting sleeve 204 can be sleeved on the mounting rod 101 and can move horizontally relative to the mounting rod 101 to change the horizontal position of the soil pushing disc 201.

[0056] Due to the influence of different terrains, etc., the surface of the film 500 is uneven. In order to reduce the damage of the soil retaining member 300 to the film 500, the soil retaining member 300 is movably connected to the traction frame through a linkage mechanism, so that the soil retaining member 300 swings with the undulation of the upper surface of the film 500, enabling the soil retaining member 300 to adapt to different soil 700 hardnesses and ground undulations, ensuring stable contact without damaging the film 500, helping to reduce the hard contact between the soil retaining member 300 and the film 500, and reducing the possibility of wear and damage.

[0057] The retaining member 300 includes a blocking plate 301 arranged along the height direction of the traction frame and a film pressing plate 302 arranged along the transverse direction of the traction frame. The blocking plate 301 arranged along the height direction of the traction frame can effectively intercept soil 700 and large rhizomes, thereby limiting the soil covering range on the film. Secondly, the film pressing plate 302 arranged along the transverse direction of the traction frame increases the contact area with the film pressing plate 302, so that the force at each part of the film 500 is more uniform, and the soil 700 and large rhizomes can be further intercepted. The blocking plate 301 and the film pressing plate 302 are fixedly connected. The film pressing plate 302 is located at the bottom of the blocking plate 301 and is in sliding contact with the upper surface of the film 500. The film pressing plate 302 is similar to a sliding shoe and can always work on the surface of the film 500. Compared with the rolling contact, the sliding contact exerts a more uniform pressure on the film 500, further reducing the damage to the film 500.

[0058] It should be noted that the front and rear ends of the film pressing plate 302 are both arc-shaped, which effectively avoids scratching the film.

[0059] Specifically, the connecting rod mechanism includes a first connecting rod 303 and a second connecting rod 304 located above the first connecting rod 303, the third connecting sleeve 204 is provided with a mounting frame extending in the longitudinal direction, the head end of the first connecting rod 303 and the head end of the second connecting rod 304 are both hinged on the mounting frame, and the head end of the second connecting rod 303 is higher than the head end of the first connecting rod 303, the tail end of the first connecting rod 303 and the tail end of the second connecting rod 304 are both located on the same side of the traction frame, the tail end of the first connecting rod 303 is hinged on the film pressing plate 302, the blocking plate 301 is provided with a movable hole 305 arranged in the longitudinal direction of the traction frame, and the tail end of the second connecting rod 304 slides The blocking plate 301 and the film pressing plate 302 are movably arranged in the movable hole 305, allowing the blocking plate 301 and the film pressing plate 302 to move relative to the traction frame. A four-link design is formed by the first connecting rod 303, the second connecting rod 304, the traction frame, the blocking plate 301 and the film pressing plate 302. The tail end of the second connecting rod 304 slides in the movable hole 305, which can drive the first connecting rod 303 to move, so that the contact angle of the film pressing plate 302 relative to the film 500 changes. The film pressing plate 302 can automatically swing according to the soil 700 conditions and terrain changes, and can also ensure that the film pressing plate 302 and the film 500 always maintain proper contact, thereby reducing gaps or overpressure during the covering process.

[0060] Since the four-link design can be interlaced and flipped, in order to prevent the blocking plate 301 and the film pressing plate 302 from flipping, a stopper 306 is provided on the blocking plate 301. The stopper 306 is located above the second link 304 to limit the upward swinging amplitude of the rear end of the soil retaining member 300, thereby preventing the blocking plate 301 and the film pressing plate 302 from flipping after being lifted off when the mechanical structure of covering the soil on the film turns. Specifically, the stopper 306 can be a stopper screw.

[0061] like Figure 8As shown, the tail end of the second connecting rod 304 is located on the front side of the movable hole 305, such that the front side height of the baffle plate 301 and the film pressing plate 302 is higher than the rear side height and is inclined; as Figure 9 shown, the tail end of the second connecting rod 304 is located in the middle of the movable hole 305, such that the front and rear side heights of the baffle plate 301 and the film pressing plate 302 are the same and are horizontally arranged; as Figure 10 shown, the tail end of the second connecting rod 304 is located on the rear side of the movable hole 305, such that the front side height of the baffle plate 301 and the film pressing plate 302 is lower than the rear side height and is inclined.

[0062] Since the film pressing plate 302 is horizontally arranged, in order to prevent soil 700 from accumulating on the film pressing plate 302 and causing excessive gravity on the film 500, the soil guiding member 400 is fixed on the baffle plate 301. The baffle plate 301 is located on one side of the film pressing plate 302 close to the soil scraping member 200, thus forming an L-shaped structure. The baffle plate 301 can more directly guide the flow of soil 700, and can also reduce the accumulation of soil 700 on the film pressing plate 302, effectively avoiding the situation where the film 500 is damaged due to excessive pressure of the film pressing plate 302 on the film 500.

[0063] It can be understood that in other embodiments, the soil retaining member can also be only one, and the two sides of the soil retaining member are used for blocking.

[0064] It can be understood that in other embodiments, the towing frame can also be provided with multiple towing rods, so that the structural strength of the towing frame is better, especially for the large load situation where the soil scraping member needs to scrape soil.

[0065] It can be understood that in other embodiments, multiple positioning holes with different heights can also be provided on the soil retaining member, and are fixed in different positioning holes through bolts to realize the adjustment of the height of the soil guiding member.

[0066] It can be understood that in other embodiments, the soil retaining member can also be inclined inward towards the center of the film from front to back.

[0067] It can be understood that in other embodiments, the soil guiding member can also rotate relative to the soil retaining member to change the inclination angle of the soil guiding member relative to the machine frame, without the need to carry multiple soil guiding members, which is more convenient to use.

[0068] It can be understood that in other embodiments, the soil retaining member can also be connected to the machine frame through an elastic member, and through the expansion and contraction of the elastic member, the soil retaining member can adapt to different terrains and reduce the damage to the film.

[0069] It can be understood that in other embodiments, the baffle plate and the film pressing plate can be an integrally formed structure, which can be a rectangular body structure and has higher structural strength.

[0070] It can be understood that in other embodiments, the soil retaining member can also be a baffle plate and a film pressing roller. The film pressing roller is located on the side of the baffle plate away from the soil scraping member. The film pressing roller and the film have a rolling friction, and the resistance is smaller.

[0071] Embodiment 2:

[0072] As Figure 12 shown, an agricultural seeder is disclosed in this embodiment, which includes a machine body 100. A hill-drop planter 106 is provided at the front of the machine body 100, and a mechanical structure for covering soil on the film is provided at the rear of the machine body 100. The mechanical structure for covering soil on the film is the mechanical structure for covering soil on the film described in any of the above technical solutions. The hill-drop planter 106 is located in front of the soil covering channel 110 on the film, which helps the seeds 600 under the film 500 to be effectively covered by the soil 700, helps to improve the quality of soil covering, enables the seeding and soil covering operations to be carried out continuously, reduces the waiting time between operation links, improves the overall operation efficiency, and the soil scraping member 200, the soil retaining member 300 and the soil guiding member 400 can also be adjusted according to the seeding position of the hill-drop planter 106, improving the adaptability of the machine.

[0073] It should be noted that in other embodiments, the agricultural seeder can also be a machine that does not include a hill-drop planter and can cover soil independently.

[0074] In addition to the above preferred embodiments, the present utility model has other implementation manners. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope claimed by the present utility model.

Claims

1. A soil covering mechanical structure on a membrane, comprising a traction frame, wherein each of the lateral sides of the traction frame is provided with a soil moving component capable of moving soil to the upper surface of the membrane, characterized in that: A soil retaining member is also provided on the traction frame between the two soil-moving members, the bottom of the soil retaining member can contact the upper surface of the membrane, the soil retaining member and the soil-moving member are spaced apart to form a soil covering channel on the membrane, and a soil guiding member is provided at the downstream position of the soil retaining member, the bottom of the soil guiding member is spaced apart from the upper surface of the membrane to limit the maximum height of the soil covering on the membrane, and the soil guiding member is arranged to be inclined toward the outside of the membrane toward the side away from the forward direction to guide the soil exceeding the preset soil covering height to the outside of the membrane.

2. The soil-covering mechanical structure on the membrane according to claim 1 is characterized in that: There are two soil retaining components, and the two soil retaining components can be fixed at different positions on the left and right sides of the traction frame, so that the spacing distance between the soil retaining component and the soil expelling component can be changed.

3. The soil-covering mechanical structure on the membrane according to claim 1 is characterized in that: The soil guiding member can be fixed at different positions of the soil retaining member along the height direction of the traction frame, so that the distance between the bottom of the soil retaining member and the upper surface of the membrane can be changed.

4. The soil-covering mechanical structure on the membrane according to claim 1 is characterized in that: The utility model comprises a plurality of soil guiding components with different inclination angles, and the soil guiding components and the soil retaining components are detachably connected.

5. The soil-covering mechanical structure on membrane according to claim 1 is characterized in that: The soil retaining component is movably connected to the traction frame through a connecting rod mechanism, so that the soil retaining component swings along with the ups and downs of the upper surface of the membrane.

6. The soil-covering mechanical structure on membrane according to claim 5, characterized in that: The retaining member comprises a blocking plate arranged along the height direction of the traction frame and a film pressing plate arranged along the transverse direction of the traction frame. The blocking plate and the film pressing plate are fixedly connected. The film pressing plate is located at the bottom of the blocking plate and is in sliding contact with the upper surface of the film.

7. The soil-covering mechanical structure on membrane according to claim 6 is characterized in that: The connecting rod mechanism includes a first connecting rod and a second connecting rod located above the first connecting rod, the head end of the first connecting rod and the head end of the second connecting rod are both hinged on the same side of the traction frame, the tail end of the first connecting rod is hinged on the film pressing plate, the blocking plate is provided with a movable hole arranged along the longitudinal direction of the traction frame, the tail end of the second connecting rod is slidably arranged in the movable hole, allowing the blocking plate and the film pressing plate to swing relative to the traction frame.

8. The soil-covering mechanical structure on membrane according to claim 7 is characterized in that: A limiting piece is provided on the blocking plate, and the limiting piece is located above the second connecting rod to limit the upward swinging range of the rear end of the soil retaining component.

9. The soil-covering mechanical structure on membrane according to claim 6, characterized in that: The soil guiding member is fixed on the blocking plate, and the blocking plate is located on a side of the film pressing plate close to the soil expelling member.

10. An agricultural seeder, characterized in that: It comprises a machine body, the front part of which is provided with a seed drill, the rear part of which is provided with a soil-covering mechanical structure on the membrane, the soil-covering mechanical structure on the membrane is the soil-covering mechanical structure on the membrane as claimed in any one of claims 1 to 9, and the seed drill is located in front of the soil-covering channel on the membrane.

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