Four-way uniform opening and inserting module and duck-bill opening and closing module for garlic seeder

Abstract

This invention relates to a four-way evenly opening planting module and a duckbill opening and closing module for a garlic planter. The duckbill opening and closing module includes a base, an opening and closing wheel, and at least three duckbill lobes. The base has guide grooves for the duckbill lobes to slide on, and the lobes contact each other sequentially in the circumferential direction to form a duckbill. A sliding platform adapted to the guide groove is fixed to each duckbill lobe. A limiting block larger than the width of the guide groove is fixed to the top of the sliding platform, supporting the duckbill lobes on the upper surface of the base to prevent them from falling off. A guide shaft extending upwards to the opening and closing wheel is fixed to the limiting block. The opening and closing wheel has an arc-shaped hole adapted to the guide shaft, with the center of the arc-shaped hole located on one side of the rotation center of the opening and closing wheel. This invention allows for the assembly of multiple modules of the four-way opening and closing module to achieve multi-row planting. The duckbill opens in four directions, and during the planting process, soil flows in from different directions when the duckbill lobes open evenly, forming a protective covering for the garlic seed, thereby effectively reducing lodging during planting.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and more particularly to the field of garlic planting, specifically to a four-way evenly opening planting module and a duckbill opening and closing module for a garlic planter. Background Technology

[0002] As an important economic crop, the sowing process is crucial for garlic cultivation. Garlic planters typically use a duckbill planting machine for sowing. Traditional duckbills open symmetrically, meaning that the two duckbill blades open synchronously to both sides via a mechanical transmission structure.

[0003] For example, in patents “CN202220786949.9, a mud-proof duckbill, planter and garlic planter”, “CN202021833301.X, a planter for garlic planters”, and “CN202410025034.X, a test device and method for key parameters of garlic planting to prevent lodging”, duckbills are used for planting.

[0004] Although the duckbill design is simple in structure, in actual use, when the duckbill opens, the soil can only flow in from both sides, and the inner sides of the two duckbills are prone to forming soilless areas. As the duckbill opens, the garlic cloves lose support and fall over, resulting in a decrease in uprightness, which adversely affects the planting quality.

[0005] The key to achieving upright planting of garlic cloves is to ensure that soil from all sides enters simultaneously when the cloves open, thus wrapping the garlic cloves from different directions, reducing lodging rate and increasing uprightness. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a four-way uniformly opening planting module and a duckbill opening and closing module for garlic planters. This allows soil to enter from all directions simultaneously as the duckbill opens, thereby wrapping the garlic seed from different directions, reducing the lodging rate of the garlic seed, and improving the uprightness of the garlic seed.

[0007] This invention is achieved through the following technical solution: a duckbill opening and closing module is provided, including a base, an opening and closing wheel rotatably connected to the base, and at least three duckbill lobes distributed sequentially along the circumference. The base has a guide groove for the duckbill lobes to slide radially. When the duckbill lobes contact each other sequentially along the circumference, a duckbill is formed. The opening and closing wheel and the base are respectively provided with a seed-dropping hole communicating with the inner cavity of the duckbill. A slide adapted to the guide groove is fixedly connected to the duckbill lobes. A limiting block larger than the width of the guide groove is fixedly connected to the top of the slide. The limiting block is supported on the upper surface of the base to prevent the duckbill lobes from falling off. A guide shaft extending upward to the opening and closing wheel is fixedly connected to the limiting block. An arc-shaped hole adapted to the guide shaft is provided on the opening and closing wheel. The center of the arc-shaped hole is located on one side of the rotation center of the opening and closing wheel.

[0008] When this solution is in use, by rotating the opening and closing wheel, the radial force generated by the arc-shaped hole on the guide shaft causes each clove of garlic to move synchronously along the corresponding guide groove, so as to bring the cloves of garlic closer together or separate. When the cloves of garlic form a beak, the garlic clove is located in the inner cavity of the beak. When the cloves of garlic move away from each other, the beak opens, the garlic clove falls down, and the soil flows between the adjacent cloves of garlic to wrap the garlic clove, thus preventing the garlic clove from falling over.

[0009] As an optimization, this solution also includes a positioning ring supported on the upper surface of the base. The positioning ring is coaxial with the seed-dropping hole, and a plurality of circumferentially distributed limiting platforms are fixed at the bottom of the positioning ring. The base has limiting slots adapted to the limiting platforms. The upper end of the positioning ring extends to the seed-dropping hole of the opening and closing wheel, and the positioning ring and the opening and closing wheel are rotatably connected by a bearing. This optimized solution facilitates the connection between the opening and closing wheel and the base by setting a positioning ring, and avoids slippage of the positioning ring by setting limiting platforms and limiting slots, thus ensuring the reliability of the rotation of the opening and closing wheel.

[0010] As an optimization, the base is square, and the four cloves, guide grooves, and arc-shaped holes are evenly distributed circumferentially. This optimized design allows the soil to wrap around the garlic cloves from four different directions when the cloves open, ensuring the uprightness of the garlic cloves and avoiding the problems of excessive clove strength causing high resistance to the opening and closing wheels.

[0011] As an optimization, several rolling steel balls are arranged sequentially along the arc direction of the arc-shaped hole in the two side walls of the hole, and the surface of the guide shaft is provided with a concave annular groove adapted to the rolling steel balls. This optimization scheme reduces the frictional resistance when the guide shaft moves by forming an arc-shaped guide rail with the rolling steel balls, and improves the flexibility of the duckbill opening and closing action.

[0012] This solution also provides a four-way uniformly opening planting module for a garlic planter, including a frame and several of the above-mentioned duckbill opening and closing modules installed on the frame. The base is fixedly connected to the frame, the duckbill extends downward out of the frame, and the frame is also provided with a drive device for driving the opening and closing wheel to rotate.

[0013] The seeding module of this solution sets several duckbill opening and closing modules on the same frame, which meets the needs of simultaneous multi-row seeding. Moreover, all duckbill modules can be moved as a whole by moving the frame, which greatly improves the degree of integration.

[0014] As an optimization, the driving device includes a rack slidably mounted on the frame and a driving mechanism that drives the rack to reciprocate along its length. The outer surface of the opening and closing wheels is provided with teeth that mesh with the rack. This optimized solution drives each opening and closing wheel to rotate via the rack, resulting in a simpler structure while ensuring the synchronicity of the opening and closing of each duckbill, thus improving sowing efficiency.

[0015] As an optimization, the drive mechanism includes a housing fixed to the frame and a rotating shaft rotatably mounted on the housing. The input end of the rotating shaft is connected to a power unit. A flywheel is also fixedly mounted on the rotating shaft, and a transmission rod parallel to the rotating shaft is mounted on the flywheel. A connecting rod is sleeved on the transmission rod, and the end of the connecting rod away from the transmission rod is hinged to a rack. This optimized solution forms an eccentric wheel mechanism through the flywheel and transmission rod. The eccentric wheel mechanism drives the rack to reciprocate, resulting in good periodicity and easy control of the sowing spacing.

[0016] As an optimization, an adjusting seat fixed to the flywheel is also included. An adjusting screw perpendicular to the transmission rod is rotatably mounted on the adjusting seat. A bevel gear I is mounted at one end of the adjusting screw. A bevel gear II meshing with bevel gear I is rotatably mounted on the flywheel. An adjusting nut, sleeved on the adjusting screw, is fixed to the transmission rod. The adjusting nut and the adjusting screw are connected by a thread. The outer surface of the adjusting nut has at least two opposing straight sections. The adjusting seat has a long groove for the transmission rod to move along the adjusting screw, and the sidewall of the long groove slides against the straight sections. This design allows for adjustment of the radial position of the transmission rod, i.e., adjustment of the eccentricity, thereby adjusting the rack movement amplitude and the duckbill opening amplitude. By rotating bevel gear II, bevel gear I and the adjusting screw rotate. The long groove restricts the rotation of the rotating rod with the adjusting screw, thus utilizing the thread to move the rotating rod closer to or away from the center of the flywheel.

[0017] As an optimization, the power unit includes a mounting plate located above the frame, and a single-row sprocket and a double-row sprocket connected by a secondary transmission chain. The double-row sprocket is connected to a motor via a primary transmission chain. The axle of the single-row sprocket is rotatably connected to the frame and is also connected to the rotating shaft. The axle of the double-row sprocket is rotatably connected to the mounting plate. At least two threaded adjusting rods extending downwards and passing through the frame are fixed to the bottom of the mounting plate. Adjusting nuts are threaded onto the upper and lower sides of the threaded adjusting rods passing through the frame. This optimized solution achieves power transmission to the rotating shaft through chain drive, ensuring the reliability of the shaft's rotation and preventing slippage. The mounting plate and threaded adjusting rods allow for adjustment of the distance between the double-row and single-row sprockets, thereby achieving chain tension.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The duckbill four-sided opening and closing module can be assembled into multiple modules according to needs to achieve multi-row sowing.

[0020] 2. The duckbill opens in four directions. When the duckbill cloves open during the planting process, the soil flows in from four different directions, forming a wrapping support for the garlic seed, thus effectively reducing the lodging of the garlic seed during planting.

[0021] 3. An eccentric wheel mechanism drives the rack to move back and forth with a fixed cycle, which facilitates the control of the sowing row spacing. At the same time, a bevel gear set is used to make the eccentricity adjustable, ultimately achieving control over the degree of opening of the duckbill during sowing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the insertion module structure of the present invention;

[0023] Figure 2 Schematic diagrams of double-row chain and single-row chain drive structures;

[0024] Figure 3 This is a schematic diagram of the mounting plate connection structure;

[0025] Figure 4 This is an exploded view of the duckbill opening and closing module of the present invention;

[0026] Figure 5 This is a schematic diagram of an eccentric wheel mechanism.

[0027] Figure 6 This is a schematic diagram of the opening and closing wheel structure;

[0028] Figure 7 This is a schematic diagram of a rack and pinion structure;

[0029] Figure 8 This is a schematic diagram of the duckbill flap structure;

[0030] Figure 9 This is a schematic diagram of the duckbill when it is closed.

[0031] As shown in the figure:

[0032] 1. Power unit; 1-1. Mounting plate; 1-2. Threaded adjusting rod; 1-3. Single-row sprocket; 1-4. Secondary transmission chain; 1-5. Double-row sprocket; 1-6. Primary transmission chain; 2. Axle of single-row sprocket; 2-1. Axle of double-row sprocket; 2-2. First bevel gear; 2-3. Second bevel gear; 2-4. Housing; 3. Duckbill opening / closing module; 3-1. Opening / closing wheel; 3-2. Bearing; 3-3. Positioning ring; 3-4 3-5. Base, 3-6. Duckbill flap, 3-7. Arc hole, 3-8. Guide groove, 3-9. Limiting platform, 3-10. Limiting slot, 3-11. Guide shaft, 3-12. Slide table, 3-13. Limiting block, 4. Frame, 5. Guide wheel, 6. Rack, 7. Connecting rod, 8. Drive mechanism, 8-1. Bevel gear II, 8-2. Bevel gear I, 8-3. Transmission rod, 8-4. Flywheel, 8-5. Adjusting seat, 8-6. Adjusting screw. Detailed Implementation

[0033] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0034] This embodiment addresses the shortcomings of existing duckbill structures by providing a duckbill opening and closing module to reliably support and wrap the garlic cloves, thus preventing them from lodging. The duckbill refers to the planting duckbill used when planting garlic, and is a commonly used garlic planting tool in the prior art.

[0035] Specifically, the duckbill opening and closing module of this embodiment includes a base 3-4, an opening and closing wheel 3-1 rotatably connected to the base, and at least three duckbill lobes 3-5 distributed sequentially along the circumference. In this embodiment, the duckbill lobes 3-5 are four evenly distributed along the circumference, that is, the duckbill lobes are one-quarter of the duckbill. The base 3-4 is provided with guide grooves 3-7 for the duckbill lobes to slide radially. The extension lines of each guide groove intersect the rotation axis of the base. When each duckbill lobe 3-5 moves to contact each other sequentially along the circumference, a duckbill is formed. The opening and closing wheel and the base are respectively provided with seed-dropping holes communicating with the inner cavity of the duckbill, and the seed-dropping holes on the opening and closing wheel and the base are respectively located at the center of the opening and closing wheel and the base.

[0036] The guide grooves 3-7 and the arc-shaped holes 3-6 are also four in number, evenly distributed around the circumference. The top plate of the base 3-4 is a square with a side length of 195mm. The guide grooves are located in the middle of the four sides of the base and extend radially outward to the side edge of the base, which facilitates the disassembly and installation of the duckbill flap.

[0037] A slide 3-11, adapted to the guide groove, is fixedly connected to the top of the outer wall of the duckbill flap. The slide is oblong, and its length direction is consistent with the length direction of the guide groove to prevent the duckbill flap from rotating. A limiting block 3-12, larger than the width of the guide groove, is fixedly connected to the top of the slide. The limiting block is supported on the upper surface of the base top plate to prevent the duckbill flap from falling downwards. A lower limiting plate, larger than the width of the guide groove, is fixedly connected to the bottom of the slide. The lower limiting plate is located below the base top plate, and the distance between the lower limiting plate and the limiting block is adapted to the thickness of the base top plate. The base blocks the lower limiting plate to prevent the duckbill flap from moving upwards. A guide shaft 3-10, extending upwards to the opening / closing wheel, is fixed to the top surface of the limiting block. The opening / closing wheel has an arc-shaped hole 3-6 that matches the guide shaft. The center of the arc-shaped hole is located to one side of the rotation center of the opening / closing wheel; that is, the circle of the arc-shaped hole is eccentrically positioned relative to the rotation center of the opening / closing wheel, which is its own center. The guide shaft extends into the arc-shaped hole. When the opening / closing wheel rotates, the radial force generated by the arc shape of the arc-shaped hole on the guide shaft causes the guide shaft to move along the guide groove, thereby driving the duckbill flap to move radially, thus opening or closing the duckbill flap. The distribution of the arc-shaped holes is as follows... Figure 6 As shown, the two opposite arc-shaped holes are symmetrically arranged about the center of the opening and closing wheel. The line connecting the midpoint of the arc length of the arc-shaped hole to the center of the arc-shaped hole is m, and the line connecting the midpoint of the arc length of the arc-shaped hole to the rotation center of the opening and closing wheel is n. The angle between m and n is 30 degrees to 45 degrees.

[0038] In order to reduce the frictional resistance of the guide shaft movement, in this embodiment, several rolling steel balls are respectively embedded in the two side walls of the arc-shaped hole, arranged sequentially along the arc direction of the arc-shaped hole, and the surface of the guide shaft 3-10 is provided with a concave annular groove adapted to the rolling steel balls.

[0039] This embodiment also includes a positioning ring 3-3 supported on the upper surface of the base. The positioning ring is coaxial with the seeding hole. A plurality of circumferentially distributed limiting platforms 3-8 are fixed to the bottom of the positioning ring. The sidewall of the seeding hole of the base has limiting grooves 3-9 adapted to the limiting platforms 3-8. The limiting grooves circumferentially limit the limiting platforms to prevent the positioning ring from rotating. The seeding hole of the base is located at the center of the base, and the axes of the opening / closing wheel, each seeding hole, and the positioning ring coincide. The upper end of the positioning ring extends to the seeding hole of the opening / closing wheel, and the positioning ring and the opening / closing wheel are rotatably connected by a bearing 3-2. The inner ring of the bearing is adapted to the upper end of the positioning ring, and the outer ring of the bearing is adapted to the seeding hole of the opening / closing wheel. The seeding hole of the opening / closing wheel is the central circular hole of the opening / closing wheel.

[0040] This embodiment also provides a four-way uniform opening planting module for a garlic planter. The four-way opening and closing duckbill modules in the module can be assembled to meet different planting needs, thereby achieving multi-row planting. Specifically, the four-way uniform opening planting module for the garlic planter includes a frame 4 and several duckbill opening and closing modules 3 installed on the frame. Each duckbill opening and closing module is arranged sequentially along the length of the frame. The base 3-4 of the duckbill opening and closing module is fixedly connected to the frame 4, and the duckbill extends downwards out of the frame. The frame is also equipped with a drive device for rotating the opening and closing wheels. The base has elongated holes extending along the width of the frame. The base is fixed to the frame by bolts passing through the elongated holes. By setting the elongated holes, the position of the base along the width of the frame can be adjusted, thereby achieving the engagement and disengagement of the opening and closing wheels and the rack. The opening and closing wheel receiving power is selected according to the planting needs, that is, the duckbill opening and closing module participating in the planting is selected as needed.

[0041] The opening and closing wheels in each duckbill opening and closing module are arranged sequentially along the length of the support. The driving device includes a rack 6 slidably connected to the frame and a driving mechanism 8 that drives the rack to reciprocate along the length. The outer circumference of the opening and closing wheel is provided with gear teeth that mesh with the rack. Through the movement of the rack, the opening and closing wheel is driven to rotate in the same direction and synchronously. The meshing transmission between the gear and the rack has the characteristics of stability and accuracy, which facilitates the adjustment of the duckbill opening degree and ensures that multiple sets of duckbills open at the same time.

[0042] like Figure 7 As shown, a guide rail extending along the length direction is fixed on the frame, and a guide groove adapted to the guide rail is fixed on the rack. A guide wheel 5 adapted to the side of the rack away from the engagement wheel is also rotatably mounted on the frame, ensuring that the rack moves back and forth in a straight line, thereby ensuring the consistency of the rack's drive on each engagement wheel.

[0043] During transplanting, the linear motion of the rack is converted into the rotational motion of the opening and closing wheel. During this process, the garlic cloves move and open along the guide groove on the base of the garlic cloves under the drive of the arc-shaped hole of the opening and closing wheel. Soil enters from all sides of the garlic cloves to wrap and support the garlic cloves, ultimately reducing the lodging of the garlic cloves.

[0044] The drive mechanism 8 includes a housing 2-4 fixed on the frame and a rotating shaft rotatably mounted on the housing. The input end of the rotating shaft is connected to the power unit 1. A flywheel 8-4 is also fixed on the rotating shaft. A transmission rod 8-3 parallel to the rotating shaft is mounted on the flywheel. The transmission rod is located on the side of the flywheel away from the rotating shaft, that is, the transmission rod is eccentrically set relative to the flywheel rotating shaft. A connecting rod 7 is sleeved on the transmission rod. The end of the connecting rod 7 away from the transmission rod is hinged to the rack 6. The connecting rod and the transmission rod can rotate relative to each other. The flywheel, the transmission rod and the connecting rod form an eccentric wheel mechanism. When the flywheel rotates, it drives the rack to reciprocate along the length of the frame.

[0045] This embodiment also includes an adjustment seat 8-5 fixedly connected to the flywheel. An adjustment screw 8-6 perpendicular to the transmission rod is rotatably mounted on the adjustment seat 8-5. The rotatable connection between the adjustment screw and the adjustment seat is an optical shaft. A bevel gear I 8-2 is mounted on one end of the adjustment screw. A bevel gear II 8-1 meshing with bevel gear I is rotatably mounted on the flywheel. An adjustment nut is fixedly mounted on the transmission rod and sleeved on the adjustment screw. The adjustment nut and the adjustment screw are connected by threads. The outer side of the adjustment nut has at least two opposing straight sections. The adjustment seat has an elongated groove for the transmission rod to move along the adjustment screw. The sidewall of the elongated groove slides in contact with the straight sections. By rotating bevel gear II8-1, bevel gear I8-2 and adjusting screw are driven to rotate. The screw action between the adjusting screw and the transmission rod, as well as the rotation restriction effect of the long groove on the transmission rod, causes the transmission rod to move along the long groove, thereby adjusting the eccentricity of the transmission rod and thus adjusting the movement amplitude of the rack. Ultimately, this allows control of the radial movement distance of the duckbill flap, facilitating the control of the degree of opening and closing of the duckbill.

[0046] The power unit 1 includes a mounting plate 1-1 located above the frame, and a single-row sprocket 1-3 and a double-row sprocket 1-5 connected by a secondary transmission chain 1-4. The double-row sprocket 1-5 is connected to a motor via a primary transmission chain 1-6. The axle 2 of the single-row sprocket is rotatably connected to the frame, and the axle of the single-row sprocket is connected to the rotating shaft via a bevel gear transmission. A first bevel gear 2-2 is installed at the output end of the axle of the single-row sprocket, and a second bevel gear 2-3 meshing with the first bevel gear is installed at the input end of the rotating shaft.

[0047] The axle 2-1 of the double-row sprocket is rotatably connected to the mounting plate. At least two threaded adjusting rods 1-2 are fixed at the bottom of the mounting plate, extending downward and passing through the frame. The threaded adjusting rods 1-2 are threaded with adjusting nuts on the upper and lower sides of the frame. The adjusting nuts restrict the up and down movement of the threaded adjusting rods. Loosening the adjusting nuts can adjust the height of the mounting plate, thereby adjusting the tension of the secondary transmission chain.

[0048] In this embodiment, the four-sided opening duckbill planting method of the planting module allows soil to flow in through multiple openings in the duckbill during the planting process, providing multi-directional wrapping and support for the garlic cloves, thereby ensuring that the garlic cloves maintain good uprightness after planting.

[0049] The method of using this invention can be described in two processes.

[0050] Before the sowing work begins, adjust the transmission rod to the appropriate position according to the needs, determine the opening angle of the duckbill, and determine the number of duckbill opening and closing modules.

[0051] State 1, Duckbill opening process:

[0052] The seed-inserting module follows the garlic planter, inserting the seed-carrying prong into the field. After the prong is inserted to the designated depth, the motor output is transmitted through a primary and secondary transmission chain to the axle of a single-row sprocket. This transmission then reaches the rotating shaft via bevel gears, causing the flywheel to rotate. This, in turn, drives the rack to reciprocate along the length of the frame. The rack meshes with the opening and closing wheel, causing the wheel to rotate. Simultaneously, the arc-shaped holes cause the prong lobes 3-5 to slide along guide grooves, opening the prong in four directions. During this opening, soil flows in through the four opening slits between the prong lobes, providing support and reducing lodging after planting.

[0053] State 2, Duckbill Closing Process:

[0054] After the garlic planting is completed, the flywheel continues to rotate under the continuous output of the drive device, causing the rack to move in the opposite direction. This causes the opening and closing wheel to rotate in the opposite direction, and the arc-shaped hole drives the duckbill lobes to move in the opposite direction, causing each duckbill lobe 3-5 to close along its original path. The elongated slide table limits the opening and closing movement of the duckbill. When the eccentric wheel mechanism rotates one revolution, that is, when the duckbill is completely closed, it is a complete planting process. As the garlic planter continues to run, the above garlic planting operation will be repeated.

[0055] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A duckbill opening and closing module, characterized in that: It includes a base (3-4), an opening and closing wheel (3-1) rotatably connected to the base, and four duckbill petals (3-5) arranged in sequence along the circumference. The base (3-4) is provided with a guide groove (3-7) for the duckbill petals to slide radially. When each duckbill petal (3-5) contacts in sequence along the circumference, a duckbill is formed. The opening and closing wheel and the base are respectively provided with a seed dropping hole communicating with the inner cavity of the duckbill. A slide (3-11) adapted to the guide groove is fixedly connected to the duckbill flap. A limiting block (3-12) larger than the width of the guide groove is fixedly connected to the top of the slide. A guide shaft (3-10) extending upward to the opening and closing wheel is fixedly connected to the limiting block. An arc-shaped hole (3-6) adapted to the guide shaft is opened on the opening and closing wheel. The center of the arc-shaped hole is located on one side of the rotation center of the opening and closing wheel. By rotating the opening and closing wheel, the radial force generated by the arc hole on the guide shaft is used to make each duckbill clove move synchronously along the corresponding guide groove, so as to make the duckbill cloves approach or separate. When each duckbill clove forms a duckbill, the garlic clove is located in the inner cavity of the duckbill. When each duckbill clove moves away from each other, the duckbill opens, the garlic clove falls, and the soil flows between the adjacent duckbill cloves to wrap the garlic clove.

2. The duckbill opening and closing module according to claim 1, characterized in that: It also includes a positioning ring (3-3) supported on the upper surface of the base. The positioning ring is coaxial with the seed hole. The bottom of the positioning ring is fixed with a plurality of limiting platforms (3-8) distributed in the circumferential direction. The base is provided with a limiting groove (3-9) adapted to the limiting platform (3-8). The upper end of the positioning ring extends to the seed hole of the opening and closing wheel, and the positioning ring and the opening and closing wheel are rotatably connected through a bearing (3-2).

3. The duckbill opening and closing module according to claim 1, characterized in that: The base (3-4) is square, and the duckbill petal (3-5), guide groove (3-7) and arc-shaped hole (3-6) are four evenly distributed along the circumference.

4. The duckbill opening and closing module according to claim 1, characterized in that: The two side walls of the arc-shaped hole are respectively provided with a number of rolling steel balls arranged sequentially along the arc direction of the arc-shaped hole, and the surface of the guide shaft (3-10) is provided with a concave annular groove adapted to the rolling steel balls.

5. A four-way evenly spaced planting module for a garlic planter, characterized in that: It includes a frame (4) and several duckbill opening and closing modules (3) as described in any one of claims 1 to 4 installed on the frame. The base (3-4) is fixedly connected to the frame (4), the duckbill extends downward out of the frame, and the frame is also provided with a drive device for driving the opening and closing wheel to rotate.

6. A four-way uniformly opening planting module for a garlic planter according to claim 5, characterized in that: The drive device includes a rack (6) that slides on the frame, and a drive mechanism (8) that drives the rack to reciprocate along the length direction. The outer surface of the opening and closing wheel is provided with teeth that mesh with the rack.

7. A four-way uniformly opening planting module for a garlic planter according to claim 6, characterized in that: The drive mechanism (8) includes a housing (2-4) fixed on the frame and a rotating shaft rotatably mounted on the housing. The input end of the rotating shaft is connected to a power device (1). A flywheel (8-4) is also fixed on the rotating shaft. A transmission rod (8-3) parallel to the rotating shaft is mounted on the flywheel. The transmission rod is located on the side of the flywheel away from the rotating shaft, that is, the transmission rod is eccentrically set relative to the rotating shaft of the flywheel. A connecting rod (7) is sleeved on the transmission rod. The end of the connecting rod (7) away from the transmission rod is hinged to a rack (6). The flywheel, the transmission rod and the connecting rod form an eccentric wheel mechanism.

8. A four-way evenly spaced planting module for a garlic planter according to claim 7, characterized in that: It also includes an adjusting seat (8-5) fixed to the flywheel. An adjusting screw (8-6) perpendicular to the transmission rod is rotatably mounted on the adjusting seat (8-5). A bevel gear I (8-2) is installed at one end of the adjusting screw. A bevel gear II (8-1) meshing with bevel gear I is rotatably mounted on the flywheel. An adjusting nut is fixed on the transmission rod and sleeved on the adjusting screw. The adjusting nut and the adjusting screw are connected by threads. The outer side of the adjusting nut has at least two opposite straight sections. The adjusting seat has a long groove for the transmission rod to move along the adjusting screw. The side wall of the long groove slides in contact with the straight section.

9. A four-way evenly spaced planting module for a garlic planter according to claim 7, characterized in that: The power unit (1) includes a mounting plate (1-1) located above the frame, and a single-row sprocket (1-3) and a double-row sprocket (1-5) connected by a secondary transmission chain (1-4). The double-row sprocket (1-5) is connected to a motor by a primary transmission chain (1-6). The axle of the single-row sprocket is rotatably connected to the frame, and the axle of the single-row sprocket is connected to the rotating shaft. The axle of the double-row sprocket is rotatably connected to the mounting plate. At least two threaded adjusting rods (1-2) are fixed at the bottom of the mounting plate, extending downward and passing through the frame. The threaded adjusting rods (1-2) are threaded with adjusting nuts on the upper and lower sides of the frame.

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