A large displacement seeding mechanism and seeding device with variable scraper plate

Abstract

Invention title: A large-displacement seeding mechanism and a seeding device with a variable scraper plate. Technical field: The present invention belongs to the technical field of agricultural machinery, and relates to a large-displacement seeding mechanism and a seeding device with a movable scraper plate based on spring force. Abstract: The present invention provides a large-displacement seeding mechanism and a seeding device with a variable scraper plate suitable for high-speed no-tillage, which improves the situation of incomplete seed filling by using pressurized seeds in a seed box, and then controls the opening and closing of the scraper of the seeding device and the wind-assisted seeding on the lining by a connecting rod mechanism designed on the end face of the seeding wheel to complete the purpose of high-speed and large-displacement seeding of the seeding device. The present invention replaces the existing groove wheel with a movable scraper, which increases the single seed filling amount and the scale of single seeding. At the same time, the seed filling method is changed to scraping with a scraper, which avoids the situation that seeds are difficult to fill under the condition of high-speed sowing and excessively high rotation speed of the groove wheel. Under the condition of high-speed sowing, stable seeding can still be achieved, which basically solves the problems of difficult seed filling and high missed seeding rate.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and relates to a large-displacement seeding mechanism and a seeding device with a variable seed scraper. Background Art

[0002] In the field of agricultural machinery technology, no-till seeding requires a higher seeding speed and seeding quality, and the high-speed seeding device is the core working component of no-till seeding. The ability to continuously and efficiently seed under complex working conditions directly affects the quality of seeding operations. In the process of increasing the seeding speed, as the speed of the outer groove wheel increases, the time for filling each groove is reduced, and the seed flow rate is not fast enough to fill the groove wheel with seeds. As the speed of the outer groove wheel increases, the groove wheel will hinder the fall of seeds, making it more difficult to fill seeds, resulting in missed seeds.

[0003] At present, the mainstream outer groove wheel seeding device mostly adopts airflow assistance or increases the initial speed of seeds to solve the problem of seed filling difficulties. However, increasing the seed speed will cause the seed damage rate to rise. In addition, there are other devices, such as the straight groove hole designed for "a kind of wheat precision seeding device" with patent number CN201711412518.6, which is larger than the ordinary outer groove wheel, which can alleviate the difficulty of seed filling, but increases the single seed output and the seeding pulse, which makes the seeding more uneven. The special seed taker designed for "a kind of seeding device" with patent number CN201710043198.5 greatly reduces the seed breakage rate and improves the seeding stability, but at the same time reduces the seeding efficiency. Driven by the motor, the crank rotates one circle to take out seeds once, and it cannot complete sowing at high speed.

[0004] In order to optimize the effect of seeding, make the seeds fully filled, uniformly seeded, smoother and avoid missed seeds, it is necessary to design a large-displacement seeding mechanism and a seeding device with a variable scraper plate for use on a no-till seeder. Summary of the invention

[0005] The purpose of the present invention is to solve the problems described in the background technology, optimize the seeding effect, make the seeds fully filled, the seeds are smoother, and no seeds are missed, and provide a large-displacement seeding mechanism and a seeding device with a variable scraper plate mainly suitable for granular seeds. The invention is characterized in that a large-displacement seeding mechanism and a seeding device with a variable scraper plate are mainly composed of a seed box cover (1), a seed box pressure spring (2), a seed box shell (3), a seed box pressure plate (4), a plastic shell (5), a seeding wheel (6), a seed outlet (7), an air-blown seed-discharging liner (8) and an air-blown seed-cleaning liner (9), a push rod (10), a connecting rod (11), a rocker shaft (12), a spring rod (13), a pin (14), etc.; the seed box is composed of a seed box shell (3), a seed box pressure plate (4), a seed box pressure spring (2) and a seed box cover (1); the pressure spring (2) is sleeved on the extended shaft of the seed box cover (1); one end of the spring is welded to the inner wall of the seed box cover (1) and the other end is welded to the seed box pressure plate (4); the extended shaft of the seed box cover (1) is inserted into the reserved hole of the seed box pressure plate (4); the seed box pressure plate is located inside the seed box shell and has a size that is adapted to the inner wall.

[0006] The plastic shell (5) is composed of a sowing side shell (501), a circular outer cover (502), a fixed arc column (503), and a seed insertion side shell (504). A power shaft hole is left at the center. The fixed arc column is used to push a push rod in a movable cavity (603) of an upper connecting rod of a seed wheel (6). The fixed arc column is located near the sowing side shell (501). The sowing side shell (501) and the seed insertion side shell (504) are concentric and have the same thickness.

[0007] The seeding wheel (6) is composed of a wheel axle (601), a spring rod support point (602), a connecting rod movable cavity (603), and a rocker arm shaft hole (604). The spring rod support point (602) is located in the connecting rod movable cavity (603), and its height is the same as the cavity depth.

[0008] The air-blown seeding liner (8) is composed of an air inlet channel (801), an air outlet hole group (802) and a liner body (803); the air inlet channel (801) is located on the outer side of the liner and is connected to the air outlet hole group (802) perpendicular to it; the air outlet hole group (802) opens toward the inside of the liner.

[0009] The air-blowing seed cleaning liner (9) is composed of a liner body (901), an air inlet channel (903), and an air outlet hole group (902); the air inlet channel (903) is located at one end of the liner body (901) and is connected to the air outlet hole group (902) perpendicular to it; the air outlet hole group (902) opens toward the interior of the liner.

[0010] The push rod (10) comprises a push rod body (1001), a spring rod cavity (1002), and a pin hole (1003) at the round end.

[0011] The connecting rod (11) has a convex end and a stepped end, and has pin holes at both ends.

[0012] The rocker arm shaft (12) is composed of a rocker arm rod (1201), a sowing shaft (1203) and a scraper (1202); the rocker arm rod (1201) and the scraper (1202) are fixed on the sowing shaft (1203), wherein a pin hole is left at the end of the rocker arm rod (1201).

[0013] The seed box seeding port is composed of a sowing side shell (501), a seeding side shell (504), an inner liner (8), an inner liner (9) and two ends of the axle (601), the outer side of the inner liner body (803) is matched with the sowing side shell (501), and the inner side has a gap of 1 mm with the sowing shaft (1203), the outer side of the inner liner body (901) is matched with the seeding side shell (504), and the inner side has a gap of 1 mm with the sowing shaft (1203). The upper part of the seed outlet (7) is matched with the lower edge of the sowing side shell (501), the lower edge of the inner liner body (803), the two ends of the axle (601), the non-hole side of the inner liner body (901), and the lower edge of the seeding side shell (504). The spring rod (13) is placed in the spring rod cavity (1002), the spring rod head is against the support point (602), the round end of the connecting rod (11) is hinged to the push rod body (1001) through the pin hole (1003) and the pin, and the other end is hinged to the rocker arm (1201) through the pin, the sowing shaft (1203) is located in the rocker arm shaft hole (604), and the axial direction is positioned by the rocker arm (1201) with a 1mm gap between the end face of the seeding wheel (6). The plastic shell (5) is concentric with the seeding wheel (6), and the push rod triangular head is located on the inner side of the sowing side shell (501) and the seeding side shell (504), and can slide in contact with the fixed arc column (503) on the shell. The scraper (1202) is placed on the wheel shaft (601), and forms a closed cavity with the wheel shaft (601) and the lining body (901).

[0014] The working principle of the present invention is that after the seeds are loaded into the seed box, the seed box pressure plate (4) and the seed box pressure spring (2) are placed, and the seed box cover (1) is buckled. Under the action of the spring pressure, the seed group under the seed box pressure plate (4) is more compact, so that the seeds fall onto the seeding wheel evenly and in time. From the direction of the left view, when the seeding wheel (6) rotates counterclockwise, the push rod (10), the spring rod (13), the connecting rod (11), and the rocker arm shaft (12) rotate counterclockwise with the seeding wheel (6). Under the elastic force of the spring rod, the whole remains relatively still at this time. The seeds fall from the seed box into the closed cavity composed of the scraper (1202), the wheel axle (601), the liner (8), the liner (9) and the inner sides of the two ends of the seeding shaft. The airflow outlet hole group (902) blows out airflow to blow excess seeds back to the seed box and reduce seed damage. As the seeding wheel (6) rotates, the seed group in the closed cavity When the seed group rotates to start contacting the seed outlet, some of the seeds in the cavity fall into the seed outlet to complete seeding, but some of the seeds are affected by the centrifugal force and remain in the cavity formed by the scraper (1202) and the wheel shaft (601). After rotating to a certain angle, the triangular end of the push rod (10) contacts the fixed arc column (503) on the outer shell. As the seed wheel (6) rotates, the fixed arc column (503) presses the push rod (10) to move into the connecting rod movable cavity (603) (at this time, the spring rod support point (602) presses against the spring rod (13), the spring is compressed, and the rod of the spring rod (13) extends into the connecting rod movable cavity (603). The spring rod cavity (1002) drives the connecting rod (11) to move outward through the pin on the pin hole (1003). The pin hole on the connecting rod (11) is hinged with the rocker arm (1201) by a pin, and swings with the movement of the connecting rod (11). The scraper (1202) is driven to rotate through the sowing shaft (1203). The scraper (1202) rotates with the sowing shaft (1203) as a fulcrum and leaves the wheel shaft (601). The airflow outlet hole group (802) takes in airflow, so that the seeds remaining in the cavity formed by the scraper (1202) and the wheel shaft (601) are accelerated to fall into the seed outlet. The three push rods (10) After the corner end passes over the fixed arc column (503), the spring of the spring rod (13) is extended, one end of which is against the spring rod support point (602), and the other end pushes the push rod (10) to move outward (the rod of the spring rod (13) leaves the spring rod cavity (1002)). The push rod (10) moves to drive the connecting rod (11) to move, and drives the rocker arm (1201) to rotate. The rocker arm (1201) and the scraper (1202) rotate coaxially, and then return to the original angle. The scraper (1202) is in close contact with the wheel shaft (601). As the seeding wheel (6) rotates, the next set of connecting rod mechanisms moves to carry out the next seeding.

[0015] The present invention designs a new scraper and replaces the original groove wheel with a movable scraper, thereby increasing the single seed filling amount and increasing the scale of single seeding. At the same time, the seed filling method is changed to scraping with a scraper, which avoids the difficulty of seed filling under the conditions of high-speed sowing and excessively high rotation speed of the groove wheel. Under the condition of high-speed sowing, stable seeding can still be achieved, which basically solves the problems of difficult seed filling and high missed seeding rate.

[0016] The beneficial effects of the present invention are as follows: the present invention can apply pressure to the seeds in the seed box through the spring and the pressure plate, so that the seeds can be better filled and the sowing amount can be maintained stable; the present invention designs a new type of scraper, so that the swing of the scraper cooperates with the rotation of the seeding wheel, and after the seeding wheel rotates through the fixed arc column (503), the scraper fits with the seeding wheel, and the scraper scrapes the seeds in the seed box to complete the seeding. When the seeding wheel rotates to the fixed arc column (503), the scraper separates from the seeding shaft, and the seeds completely fall into the seed outlet, thereby achieving the design and production purpose of smooth seed filling and stable sowing amount; the present invention leaves a series of air outlet holes on the inner lining After the scraper and the seeding shaft are separated, the airflow at the air holes on the air-blowing seeding liner flows toward the seed outlet because the upper part is connected to the seed box, driving the seeds to fall and assisting seeding. The airflow from the air holes on the air-blowing seed-clearing liner can avoid the scraper from scraping excessive seeds from the seed box, or the seeds piling up at the connection between the liner and the seed box, thereby reducing the seed breakage rate. The whole set of mechanisms of the present invention has a simple structure and is easy to operate. The present invention can be used in a variety of seeding machines and a variety of crops (wheat, soybeans), has strong versatility, and optimizes the seeding effect of the no-till seeding machine. The application of the present invention is conducive to reducing the phenomenon of poor seeding and insufficient sowing and missed sowing during the seeding process, improving the uniformity of sowing, thereby increasing the yield of crops and promoting the development of agricultural machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a large displacement seeding mechanism with a variable seed scraper plate and a seeding device; the positional relationship between the pressure plate and the pressure spring is shown in a cross section at the seed box;

[0018] Figure 2 It is a left view of a large displacement seeding mechanism with a variable seed scraper and a seeding device, and the relationship between the seeding wheel and various components is not shown in the figure;

[0019] Figure 3 It is a right view of a large displacement seeding mechanism with a variable seed scraper and a seeding device;

[0020] Figure 4 It is the left view of the plastic housing;

[0021] Figure 5 The front view and right view of the scraper;

[0022] Figure 6 It is a three-dimensional schematic diagram of the air-blowing seeding liner and the air-blowing seed-clearing liner;

[0023] Figure 7 The front view and top view of the seed wheel;

[0024] Figure 8 for Figure 1 Screenshot of section AA, with the various mechanisms shown in the figure. At this time, the scraper is not opened and the seeds have not been completely discharged;

[0025] Fig. 9 for Figure 1 Screenshot of the cross section of BB, at this time the seeds have not been completely expelled;

[0026] Fig.10 for Figure 1 Screenshot of section AA, with the various mechanisms shown, at this point the seeds have been completely expelled;

[0027] Fig.11 for Figure 1 Screenshot of the cross section of BB, at this point the seeds have been completely expelled.

[0028] In the figure, 1--seed box cover, 2--seed box pressure spring, 3--seed box shell, 4--seed box pressure plate, 5--plastic shell, 501--seeding side shell, 502--round outer cover, 503--fixed arc column, 504--seeding side shell, 6--seed wheel, 601-wheel axle, 602--spring rod support point, 603--connecting rod movable cavity, 604--rocker arm shaft hole, 7--seed outlet, 8--air blowing seed lining, 801--air inlet channel , 802--air flow outlet hole group, 803--lining body, 9--air blowing seed cleaning lining, 901--lining body, 902--air flow outlet hole group, 903--air intake channel, 10--push rod, 1001--push rod body, 1002--spring rod cavity, 1003--pin control, 11--connecting rod, 12--rocker shaft, 1201--rocker rod, 1202--scraper, 1203--seeding shaft, 13--spring rod, 14-pin. Implementation

[0029] The present invention is further described in detail below in conjunction with the embodiments and drawings. Figure 1 , Figure 2 and Figure 3 The front view, left view and right view of an embodiment of a large-displacement seeding mechanism and a seeding device with a variable seed scraper plate are respectively shown. The large-displacement seeding mechanism and the seeding device with a variable seed scraper plate are mainly composed of a seeding wheel surrounded by a plastic shell and an inner lining, a connecting rod mechanism installed on the seeding wheel roller, a seed box and a seeding port.

[0030] like Figure 4The left view of the plastic shell shown in the figure shows that the plastic shell (5) is composed of a sowing side shell (501), a circular outer cover (502), a fixed arc column (503), and a seeding side shell (504). A power shaft hole is left in the center, and the fixed arc column (503) is used to fix the sowing wheel push rod and is located near the sowing side shell (501). The sowing side shell (501) and the seeding side shell (504) are concentric and have the same thickness.

[0031] like Figure 5 The scraper front view and right view shown in the figure, the scraper (1202), the sowing shaft (1203), and the rocker arm (1201) form a rocker arm (12), and the rocker arm (1201) and the scraper (1202) are fixed on the sowing shaft (1203), and the two are placed at an angle of 75 degrees, wherein a pin hole is left at the end of the rocker arm (1201).

[0032] like Figure 6 The three-dimensional schematic diagrams of the air-blowing seeding liner and the air-blowing seed cleaning liner shown are as follows: the air-blowing seeding liner (8) is composed of an air inlet channel (801), an air flow outlet hole group (802) and a liner body (803); the air inlet channel (801) is located on the outer side of the liner and is connected to the air flow outlet hole group (802) perpendicular to it; the air flow outlet hole group (802) opens toward the inside of the liner; the air-blowing seed cleaning liner (9) is composed of a liner body (901), an air inlet channel (903) and an air flow outlet hole group (902); the air inlet channel (903) is located at one end of the liner body (901) and is connected to the air flow outlet hole group (902) perpendicular to it; the air flow outlet hole group (902) opens toward the inside of the liner.

[0033] like Figure 7 The front view and top view of the seeding wheel shown in the figure, the seeding wheel (6) is composed of a wheel axle (601), a spring rod support point (602), a connecting rod movable cavity (603), and a rocker shaft hole (604). The connecting rod movable cavity (603) and the rocker shaft hole (604) are opened on one end face of the seeding wheel, and the spring rod support point (602) is located in the connecting rod movable cavity (603), and the height is the same as the cavity depth. The seed box lower seeding port is connected to the sowing side shell (501), the seeding side shell (504), the liner (8), the liner (9) and the two ends of the wheel axle (601), the outer side of the liner body (803) is matched with the sowing side shell (501), and the inner side is left with a gap of 1 mm with the sowing shaft (1203), and the outer side of the liner body (901) is matched with the seeding side shell (504), and the inner side is left with a gap of 1 mm with the sowing shaft (1203). The upper portion of the seed outlet (7) is connected and matched with the lower edge of the sowing side shell (501), the lower edge of the lining body (803), the two ends of the wheel axle (601), the non-porous side of the lining body (901), and the lower edge of the seed entry side shell (504).

[0034] like Figure 8 , Fig.10 , Fig. 9 , Fig.11 The AA section and the BB section respectively show the process of the scraper from closing to opening. State 1: the scraper at the seed outlet has not yet completely discharged the seeds. The spring rod (13) is placed in the spring rod cavity (1002), the spring rod head is against the support point (602), the round end of the connecting rod (11) is hinged to the push rod body (1001) through the pin hole (1003) and the pin, and the other end is hinged to the rocker arm (1201) through the pin. The sowing shaft (1203) is located in the rocker arm shaft hole (604), and the axial direction is positioned by the rocker arm (1201) with a 1mm gap between the end face of the seeding wheel (6). The plastic shell (5) is concentric with the seeding wheel (6), and the push rod triangular head is located on the inner side of the sowing side shell (501) and the seeding side shell (504), and can slide in contact with the fixed arc column (503) on the shell. The scraper (1202) is placed on the wheel shaft (601) and forms a closed cavity with the wheel shaft (601) and the liner body (901). When the seeding wheel (6) rotates, the push rod (10), the spring rod (13), the connecting rod (11), and the rocker arm shaft (12) rotate counterclockwise together with the seeding wheel (6). The spring rod elastic force supports the push rod body (1001). At this time, the whole body remains relatively still. The seeds are scraped by the scraper (1202) under the force of gravity and extrusion, and enter the closed cavity inside the scraper (1202), the wheel shaft (601), the liner (8), the liner (9) and the two ends of the seeding shaft. The airflow The outlet hole group (902) blows out air flow, which plays a role in reducing seed damage and blowing excess seeds back into the seed box; State 2: As the seeding wheel (6) rotates, the seed group rotates in the closed cavity. When the seed group rotates to begin to contact the seed outlet, some seeds fall into the seed outlet to complete the seeding, and the remaining seeds are affected by the centrifugal force and remain in the cavity formed by the scraper (1202) and the wheel shaft (601); State 3: After rotating a certain angle, the ladder of the push rod (10) The shaped end contacts the fixed arc column (503) on the housing. As the wheel shaft rotates, the fixed arc column (503) presses the push rod (10) to move into the connecting rod movable chamber (603). At this time, the spring rod support point (602) abuts against the spring rod (13), and the spring is compressed (the rod of the spring rod (13) extends into the spring rod chamber (1002)). The connecting rod (11) is driven to move outward through the pin on the pin hole (1003). The pin hole on the connecting rod (11) is aligned with the rocker arm (1201). ) is hinged with a pin and swings with the movement of the connecting rod (11), driving the scraper (1202) to rotate through the sowing shaft (1203) (at this time, the seeds have partially fallen, the movement resistance of the scraper is small, and the damage to the seeds is small). The scraper (1202) rotates with the sowing shaft (1203) as a fulcrum, leaving the wheel shaft (601), and the air flow outlet hole group (802) enters the air flow, so that the seeds remaining in the cavity formed by the scraper (1202) and the wheel shaft (601) are accelerated to fall into the seed outlet.

[0035] The present invention is applied to a no-till high-speed seeder. Before operation, the air inlet channel (801), the air outlet hole group (802), the air outlet hole group (902), and the air inlet channel (903) are cleaned. The seeding wheel is rotated to an angle where no scraper leaves the seeding wheel shaft.

[0036] After the seeds are loaded into the seed box, the seed box pressure plate (4) and the seed box pressure spring (2) are pressed on to buckle the seed box cover (1).

[0037] The invention has a simple structure and is easy to operate, optimizes the seeding effect, and is suitable for a no-till seeder that matches a variety of tillage modes.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large displacement seeding mechanism with a variable seed scraper plate, characterized in that: The mechanism is composed of a seed box cover (1), a seed box pressure spring (2), a seed box shell (3), a seed box pressure plate (4), a plastic shell (5), a seed discharge wheel (6), a seed outlet (7), an air-blown seed discharge liner (8) and an air-blown seed cleaning liner (9), a push rod (10), a connecting rod (11), a rocker arm shaft (12), and a spring rod (13); the seed box is composed of a seed box shell (3), a seed box pressure plate (4), a seed box pressure spring (2) and a seed box cover (1); the pressure spring (2) is sleeved on the extension shaft of the seed box cover (1); one end of the spring is welded to the inner wall of the seed box cover (1), and the other end is welded to the seed box pressure plate (4); the seed box cover (1) The extended shaft is inserted into the reserved hole of the seed box pressure plate (4), and the seed box pressure plate is located inside the seed box shell and has a size that is adapted to the inner wall; the plastic shell (5) is composed of a sowing side shell (501), a circular outer cover (502), a fixed arc column (503), and a seed insertion side shell (504), with a power shaft hole reserved in the center, and the fixed arc column is used to push the push rod in the connecting rod active cavity (603) on the seeding wheel (6), and is located near the sowing side shell (501), and the sowing side shell (501) and the seed insertion side shell (504) are concentric and have the same thickness; the seeding wheel (6) is composed of a wheel axle (601), a spring rod support point (602), a connecting rod active cavity (603), and a rocker shaft hole (604); the spring rod support point (602) is located in the connecting rod active cavity (603), and the height is the same as the cavity depth; the air-blowing seeding liner (8) is composed of an air inlet channel (801), an air outlet hole group (802) and a liner body (803); the air inlet channel (801) is located on the outer side of the liner and is connected to the air outlet hole group (802) perpendicular to it, and the air outlet hole group (802) opens toward the inside of the liner; the air-blowing seed cleaning liner (9) is composed of a liner body (901), an air inlet channel (903), and an air outlet hole group (902); the air inlet channel (903) is located on the outer side of the liner One end of the main body (901) is connected to an airflow outlet hole group (902) perpendicular to it, and the airflow outlet hole group (902) opens toward the inside of the lining; the push rod (10) comprises a push rod main body (1001), a spring rod cavity (1002), and a pin hole (1003) at the round end; one end of the connecting rod (11) is convex, the other end is stepped, and both ends have pin holes; the rocker arm shaft (1201) is composed of a rocker arm (1201), a sowing shaft (1203), and a scraper (1202), the rocker arm (1201) and the scraper (1202) are fixed on the sowing shaft (1203), wherein a pin hole is left at the end of the rocker arm (1201);The seed box seed lower opening is connected to the sowing side shell (501), the seed entry side shell (504), the air-blowing seed discharge liner (8), the air-blowing seed cleaning liner (9) and the two ends of the wheel axle (601); the outer side of the liner body (803) is matched with the sowing side shell (501), and the inner side has a gap of 1 mm with the sowing shaft (1203); the outer side of the liner body (901) is matched with the seed entry side shell (504), and the inner side has a gap of 1 mm with the sowing shaft (1203); the upper part of the seed outlet (7) is matched with the lower edge of the sowing side shell (501), the lower edge of the liner body (803), the two ends of the wheel axle (601), the non-hole side of the liner body (901), and the lower edge of the seed entry side shell (504); the spring rod (13) is arranged In the spring rod cavity (1002), the spring rod head is against the support point (602), the round end of the connecting rod (11) is hinged to the push rod body (1001) through the pin hole (1003) and the pin, and the other end is hinged to the rocker arm (1201) through the pin, the sowing shaft (1203) is located in the rocker arm shaft hole (604), and the axial direction is positioned by the rocker arm (1201) with a 1mm gap between the end face of the seeding wheel (6), the plastic shell (5) is concentric with the seeding wheel (6), the push rod triangular head is located on the inner side of the sowing side shell (501) and the seeding side shell (504), and is in sliding contact with the fixed arc column (503) on the shell, and the scraper (1202) is placed on the wheel shaft (601), and forms a closed cavity with the wheel shaft (601) and the lining body (901). ;

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