A seed dropping device for corn seeding

Abstract

The disclosure relates to the technical field of corn seeding, and an embodiment of the disclosure provides a seed dropping device for corn seeding, which comprises a fixing frame and a disc shell, the disc shell is arranged at the bottom of the fixing frame, a rotary feeding assembly is arranged in the disc shell, a deep-seeding seed dropping assembly is arranged between the fixing frame and the disc shell, the deep-seeding seed dropping assembly comprises a first electric telescopic rod, the first electric telescopic rod is fixed vertically downward on the fixing frame, a connecting frame is arranged on the side surface of the disc shell, the connecting frame is fixedly connected with the output end of the first electric telescopic rod, a second electric telescopic rod is installed in the connecting frame, and a lower inserting rod is arranged in the disc shell. Through the technical scheme, the technical problem that, in the prior art, the kinetic energy of seed falling is insufficient due to the influence of air resistance, soil particle blocking on the surface of the trench and the like, and the seed often only stays in the upper part of the trench and is difficult to reach the deep soil meeting the growth requirement of corn is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of corn planting, and more specifically, to a corn planting device. Background Technology

[0002] In large-scale corn planting, the seeding device is the core component of the seeder. Its seeding effect directly determines the depth of the seeds in the soil, which is closely related to the germination rate of corn seeds and the stress resistance of seedlings. Appropriate deep sowing can allow seeds to avoid the dry environment on the surface, reduce pest infestation, and promote deep root development, laying the foundation for later growth.

[0003] The current mainstream method of corn sowing mostly relies on the natural falling of seeds using a seed metering device: after the seed metering device delivers a fixed amount of corn seeds into the sowing channel, the seeds fall freely under their own weight into the pre-dug planting furrows. This sowing method has obvious shortcomings, the core problem being that the seeds cannot enter the furrows deeply enough: on the one hand, during the fall, the seeds are affected by air resistance and obstruction from surface soil particles, resulting in insufficient kinetic energy, often only remaining in the upper part of the furrow, making it difficult to reach the deeper soil layers required for corn growth; on the other hand, in areas with loose surface soil, the seeds may even deviate from the furrow during the fall, or the actual depth of penetration may become even shallower after covering with soil due to surface soil collapse.

[0004] The existing natural falling seeding method can no longer meet the needs of deep and stable sowing. Developing a seeding device that can push seeds deeper into the furrow has become a key direction for the improvement of corn planting machinery. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a seeding device for corn sowing, which solves the technical problem in the prior art that the seeds are affected by air resistance and the obstruction of surface soil particles in the trench during the falling process, resulting in insufficient falling kinetic energy and often only staying in the upper part of the trench, making it difficult to reach the deep soil that meets the growth requirements of corn.

[0006] According to one aspect, at least one embodiment of this disclosure provides a seeding device for corn planting, comprising: A mounting frame and a disk housing, wherein the disk housing is disposed at the bottom of the mounting frame; A rotary feed assembly is disposed inside the disc housing; A deep seeding component is disposed between the fixing frame and the disc shell; The deep seeding assembly includes a first electric telescopic rod, which is fixed vertically downward on the fixed frame. A connecting frame is provided on the side surface of the disc shell, and the connecting frame is fixedly connected to the output end of the first electric telescopic rod. A second electric telescopic rod is installed inside the connecting frame, and a lower insertion rod is provided inside the disc shell.

[0007] As a further technical solution, the side surface of the disc shell is provided with an elongated opening, the upper end of the insertion rod passes through the elongated opening and is connected to the output end of the second electric telescopic rod, and a stabilizing frame is provided on the side surface of the disc shell, the upper end of the stabilizing frame being vertically and movably connected to the fixing frame.

[0008] According to another aspect, in at least one embodiment of the present invention, the rotary feeding assembly includes a rotary disk, which is rotatably connected inside the disk housing. The rotary disk is driven to rotate by electricity. A central groove is formed on the side surface of the rotary disk, and the lower insertion rod is located in the central groove. Several through cavities are formed around the inside of the rotary disk.

[0009] As a further technical solution, an inlet tube is provided on the side surface of the disc shell, and a matching interface is provided on the inner surface of the cavity. The matching interface can communicate with the inlet tube. Both ends of the cavity are open structures, and the lower insertion rod can pass through the cavity.

[0010] As a further technical solution, a partition is provided inside the central groove, the partition passes through the long opening and is fixedly connected to the connecting frame, and an insertion tube is provided at the bottom of the disc shell, the insertion tube and the lower insertion rod are located at the vertical axis of the notification.

[0011] As a further technical solution, side openings are provided on both sides of the bottom of the insertion tube, and a blocking plate is rotatably connected to the side opening through a pin. The pin connection of the blocking plate is driven by a torsion spring, and the lower end of the lower insertion rod has a tapered cross-section.

[0012] As a further technical solution, a telescopic connecting pipe is provided at the upper end of the inlet pipe.

[0013] As a further technical solution, the fixing frame has an overall L-shaped structure, and several fixing holes are opened at both ends of the side surface of the fixing frame.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the seeding and feeding assembly solves the problems of insufficient seed kinetic energy and inability to sow deeply in traditional seeding devices through the coordinated use of dual telescopic rods and a vertical guiding design. The first electric telescopic rod adjusts the height of the seed tray to adapt to different soil hardness, laying the foundation for deep sowing; the second electric telescopic rod drives the lower insertion rod to insert vertically, with the tapered lower end reducing soil penetration resistance and ensuring that the seeds reach deep soil layers, avoiding them remaining in the upper part of the trench. The stabilizing frame restricts the lateral displacement of the seed tray and the lower insertion rod, ensuring vertical insertion accuracy and preventing seed landing point deviation; the elongated opening provides sliding guidance for the lower insertion rod, preventing movement jamming. The overall structure does not rely on the seed's own weight to fall; it actively pushes the seed to provide sufficient kinetic energy, meeting the deep sowing requirements of corn growth, while improving the consistency of sowing depth and reducing problems such as low germination rate and poor stress resistance caused by insufficient depth, thus providing a guarantee for the later growth of corn. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 This is another isometric sectional view from which this disclosure is presented; Figure 5 Appendix to this disclosure Figure 4 Enlarged view of part A in the middle; In the diagram: 1. Fixing frame; 2. Disc shell; 3. Deep sowing assembly; 3-1. First electric telescopic rod; 3-2. Connecting frame; 3-3. Second electric telescopic rod; 3-4. Lower insertion rod; 3-5. Long opening; 3-6. Stabilizing frame; 4. Rotary feeding assembly; 4-1. Rotary disc; 4-2. Central groove; 4-3. Through cavity; 4-4. Inlet pipe; 4-5. Connecting interface; 4-6. Partition; 4-7. Insertion pipe; 4-8. Side opening; 4-9. Baffle plate; 5. Telescopic connecting pipe; 6. Fixing hole. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-5 As shown, a corn planting device according to an embodiment of the present disclosure is illustrated, comprising: A fixing frame 1 and a disk housing 2, wherein the disk housing 2 is disposed at the bottom of the fixing frame 1; A rotary feeding assembly 4 is disposed inside the disc housing 2; Deep seeding component 3 is disposed between the fixing frame 1 and the disc shell 2; The deep sowing assembly 3 includes a first electric telescopic rod 3-1, which is vertically fixed downward on the fixed frame 1. A connecting frame 3-2 is provided on the side surface of the disc shell 2, and the connecting frame 3-2 is fixedly connected to the output end of the first electric telescopic rod 3-1. A second electric telescopic rod 3-3 is installed inside the connecting frame 3-2. A lower insertion rod 3-4 is provided inside the disc shell 2. An elongated opening 3-5 is opened on the side surface of the disc shell 2, and the upper end of the insertion rod passes through the elongated opening 3-5 and connects to the output end of the second electric telescopic rod 3-3. A stabilizing frame 3-6 is provided on the side surface of the disc shell 2, and the upper end of the stabilizing frame 3-6 is vertically and movably connected to the fixed frame 1.

[0024] In some examples, in order to achieve vertical insertion of corn seeds into the soil and precise control of the sowing depth, avoiding seed exposure or low germination rate caused by insufficient depth in traditional sowing, a deep sowing component was designed. This component includes a first electric telescopic rod 3-1 fixed vertically downward on a fixed frame 1, which is the core component for adjusting the overall height of the disc shell 2. Its output end is fixedly connected to the connecting frame 3-2 on the side surface of the disc shell 2. By extending and retracting the first electric telescopic rod 3-1, the disc shell 2 can be driven to rise and fall vertically, thereby adjusting the initial distance between the insertion tube 4-7 at the bottom of the disc shell 2 and the ground. This provides a basic height adjustment for the subsequent deep sowing with the insertion rod 3-4, adapting to the deep sowing needs of different soil hardness (such as clay, which requires increasing the initial height to enhance the insertion force, and sandy soil, which requires decreasing the height to avoid excessive insertion).

[0025] The second electric telescopic rod 3-3 installed inside the connecting frame 3-2 and the lower insertion rod 3-4 constitute the deep seeding execution structure. The upper end of the lower insertion rod 3-4 passes through the long opening 3-5 on the side surface of the disc shell 2 and is connected to the output end of the second electric telescopic rod 3-3. The long opening 3-5 provides vertical sliding guidance for the lower insertion rod 3-4 to prevent the lower insertion rod 3-4 from deviating when it rises and falls. When the second electric telescopic rod 3-3 is started, it can directly drive the lower insertion rod 3-4 to move vertically up and down along the long opening 3-5. The tapered structure at the lower end of the lower insertion rod 3-4 can reduce the resistance when inserting into the soil layer, ensuring that the lower insertion rod 3-4 penetrates the soil layer quickly and vertically, and avoiding tilting that causes the seed landing point to deviate or the depth to be uneven.

[0026] The upper end of the stabilizing frame 3-6 on the side surface of the disc shell 2 is vertically and movably connected to the fixed frame 1, and the lower end is fixed to the disc shell 2, forming a dual stabilizing structure for the lifting and lowering of the disc shell 2 and the movement of the lower insertion rod 3-4. When the first electric telescopic rod 3-1 drives the disc shell 2 to lift or lower, or the second electric telescopic rod 3-3 drives the lower insertion rod 3-4 to move, the stabilizing frame 3-6 can limit the lateral displacement of the disc shell 2 and the lower insertion rod 3-4, prevent structural shaking caused by vibration or soil resistance, and ensure that the lower insertion rod 3-4 always moves along the vertical axis, ensuring accurate and consistent deep sowing depth.

[0027] The two telescopic rods can operate independently or synchronously (for example, while the first electric telescopic rod 3-1 lowers the height of the disc shell 2, the second electric telescopic rod 3-3 drives the lower insertion rod 3-4 to insert, shortening the deep sowing time). The length of the long opening 3-5 needs to be adapted to the maximum insertion stroke of the lower insertion rod 3-4 to ensure that the deep sowing depth is adjustable. The movable set of the stabilizing frame 3-6 and the fixed frame 1 needs to maintain a moderate smoothness to ensure stable guidance and avoid jamming that affects the deep sowing efficiency.

[0028] During operation, the first electric telescopic rod 3-1 adjusts the height of the disc shell 2, the second electric telescopic rod 3-3 drives the lower insertion rod 3-4 to vertically enter the soil, and the stabilizing frame 3-6 ensures vertical accuracy. Together, they achieve deep seed sowing and meet the depth requirements of corn sowing.

[0029] like Figures 1-5 As shown in the figure, this embodiment proposes that the rotary feeding assembly 4 includes a rotary disk 4-1, which is rotatably connected inside the disk shell 2. The rotary disk 4-1 is driven to rotate by electricity. A central groove 4-2 is formed on the side surface of the rotary disk 4-1, and the lower insertion rod 3-4 is located in the central groove 4-2. Several through cavities 4-3 are formed around the inside of the rotary disk 4-1. An inlet pipe 4-4 is provided on the side surface of the disk shell 2. A connecting interface 4-5 is formed on the inner surface of the through cavity 4-3, which can communicate with the inlet pipe 4-4. Both ends of the through cavity 4-3 are open. The structure includes a lower insertion rod 3-4 that can pass through the through cavity 4-3. A partition 4-6 is provided inside the central groove 4-2. The partition 4-6 passes through the long opening 3-5 and is fixedly connected to the connecting frame 3-2. An insertion tube 4-7 is provided at the bottom of the disc shell 2. The insertion tube 4-7 and the lower insertion rod 3-4 are located at the vertical axis. Side openings 4-8 are provided on both sides of the bottom of the insertion tube 4-7. A blocking plate 4-9 is rotatably connected to the side opening 4-8 through a pin. The pin connection of the blocking plate 4-9 is driven by a torsion spring. The lower end of the lower insertion rod 3-4 has a tapered cross-section.

[0030] In some examples, in order to achieve orderly delivery and deep sowing of corn seeds and avoid missed or overlapping sowing caused by disordered seed delivery, a rotary feeding assembly 4 was designed. This assembly includes a rotating disk 4-1 rotatably connected inside the disk shell 2 and driven by electricity to rotate. It is the core carrier for seed delivery. The central groove 4-2 on its side surface provides movement space for the lower insertion rod 3-4, ensuring that the lower insertion rod 3-4 does not interfere with the rotating disk 4-1 when it is raised or lowered. Several through cavities 4-3 opened around the inside of the rotating disk 4-1 provide independent housing units for seeds, which can prevent seeds from being squeezed and clumped together during delivery, ensuring independent delivery of single or quantitative seeds, and adapting to the precise requirement of one seed per corn plant.

[0031] The inlet pipe 4-4 on the side surface of the disc shell 2 and the interface 4-5 inside the cavity 4-3 form a seed input passage. When the rotating disc 4-1 rotates to the point where the interface 4-5 of a certain cavity 4-3 is connected to the inlet pipe 4-4, the corn seeds from the external seed storage device can enter the cavity 4-3 through the inlet pipe 4-4 and the interface 4-5, thus realizing automatic seed replenishment.

[0032] The openings at both ends of the cavity 4-3, combined with the vertical movement of the lower insertion rod 3-4, form a seed delivery and pushing mechanism. When the lower insertion rod 3-4 descends, its lower end can pass through the cavity 4-3 (because the lower insertion rod 3-4 is located in the central groove 4-2 and the cavity 4-3 rotates to the lower insertion path), pushing the seeds in the cavity 4-3 downwards, thus completing the precise docking of the seeds with the lower insertion rod 3-4.

[0033] The insertion tube 4-7 at the bottom of the disc shell 2 is coaxial with the lower insertion rod 3-4, providing a vertical falling channel for the seeds and ensuring that the seeds pushed by the lower insertion rod 3-4 enter the soil vertically along the insertion tube 4-7, avoiding the seeds from deviating midway; the baffle plates 4-9 on both sides of the bottom of the insertion tube 4-7 are rotatably connected by a pin, and the torsion spring at the pin provides a restoring force for the baffle plates 4-9. When the lower insertion rod 3-4 is inserted, its conical lower end can push open the baffle plates 4-9, allowing the seeds to fall into the soil layer; after the lower insertion rod 3-4 is pulled out, the torsion spring drives the baffle plates 4-9 to close, preventing soil and weeds from entering the insertion tube 4-7 and blocking the channel.

[0034] The partition 4-6 inside the central groove 4-2 passes through the long opening 3-5 and is fixed to the connecting frame 3-2, which can separate the central groove 4-2 from the through cavity 4-3, preventing seeds from entering the central groove 4-2 and interfering with the movement of the lower insertion rod 3-4. The rotation speed of the rotating disk 4-1 can be adjusted by the control module to ensure that the alignment frequency of the through cavity 4-3, the inlet pipe 4-4, and the lower insertion rod 3-4 is matched, so as to avoid seed accumulation in the through cavity 4-3 due to excessively fast seed delivery or missed seeding due to excessively slow delivery.

[0035] During operation, the rotating disc 4-1 with the through cavity 4-3 inoculates and delivers seeds to the lower insertion path, the lower insertion rod 3-4 pushes the seeds into the soil through the insertion tube 4-7, and the blocking plate 4-9 controls the seeds to prevent blockage. Together, they achieve directional seed delivery and deep sowing, meeting the needs of precision corn sowing.

[0036] For example, such as Figure 1 As shown, a telescopic connecting pipe 5 is provided at the upper end of the inlet pipe 4-4.

[0037] In some examples, the telescopic connecting pipe 5 at the upper end of the inlet pipe 4-4 can flexibly adapt to external seed storage equipment of different heights, solving the problem of height mismatch when connecting traditional fixed-length pipes, and improving the versatility of the connection between the rotary feeding assembly 4 and the seed storage equipment. The telescopic structure can be freely stretched or contracted according to the actual height of the seed outlet of the seed storage box, without the need for additional adapter pipes or cutting and adjustment, greatly simplifying the connection operation.

[0038] For example, such as Figure 1 As shown, the fixing frame 1 has an overall L-shaped structure, and several fixing holes 6 are provided at both ends of the side surface of the fixing frame 1.

[0039] In some examples, the L-shaped structure of the mounting bracket 1 and the mounting holes 6 at both ends of its side surface can adapt to the installation requirements of different parts of the seeder, enhance the connection stability between the device and the seeder, and provide reliable support for the vertical deep sowing of the deep sowing component. The L-shaped structure can fit into the transverse frame and longitudinal support of the seeder respectively, achieving bidirectional fitting and fixing, avoiding the installation limitations caused by fixing in one direction.

[0040] In actual use: Securely install the L-shaped mounting bracket 1 at the designated position on the seeder using the fixing holes 6 on the side surface of the mounting bracket 1. Adjust the telescopic connecting pipe 5 at the upper end of the inlet pipe 4-4 to ensure precise connection with the external seed storage equipment. Start the electric drive of the rotating feeding assembly 4, causing the rotating disc 4-1 inside the disc shell 2 to rotate at a uniform speed. When the through cavity 4-3 on the rotating disc 4-1 connects with the interface 4-5 of the inlet pipe 4-4, the corn seeds enter the through cavity 4-3 through the inlet pipe 4-4 and the interface 4-5, moving synchronously with the rotating disc 4-1. Depending on the soil conditions, activate the first electric telescopic rod 3-1, which drives the disc shell 2 to rise and fall vertically via the connecting bracket 3-2. The stabilizing bracket 3-6 slides synchronously along the mounting bracket 1, ensuring the disc shell 2 remains vertical at all times. Adjust to a suitable height where the insertion pipe 4-7 is close to the ground. When the cavity 4-3 rotates to directly below the lower insertion rod 3-4, the second electric telescopic rod 3-3 is activated, driving the lower insertion rod 3-4 through the long opening 3-5 of the disc shell 2 and the central groove 4-2 of the rotating disk 4-1. The conical lower end passes through the cavity 4-3 and pushes open the blocking plate 4-9 at the bottom of the insertion tube 4-7, vertically pushing the seed into the deep soil. After sowing is completed, the second electric telescopic rod 3-3 drives the lower insertion rod 3-4 to retract, and the blocking plate 4-9 closes under the action of the torsion spring to prevent soil from entering the insertion tube 4-7. The rotating disk 4-1 continues to rotate, and the above seed delivery and sowing process is repeated in the next cavity 4-3, achieving continuous and precise deep sowing.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A seed dropping device for corn seeding, characterized by, include: A fixing frame (1) and a disk shell (2), wherein the disk shell (2) is disposed at the bottom of the fixing frame (1); A rotary feed assembly (4) is disposed inside the disc housing (2); A deep seeding component (3) is disposed between the fixing frame (1) and the disc shell (2); The deep sowing component (3) includes a first electric telescopic rod (3-1), which is fixed vertically downward on the fixed frame (1). A connecting frame (3-2) is provided on the side surface of the disc shell (2). The connecting frame (3-2) is fixedly connected to the output end of the first electric telescopic rod (3-1). A second electric telescopic rod (3-3) is installed inside the connecting frame (3-2). A lower insertion rod (3-4) is provided inside the disc shell (2).

2. The seed drop device for corn planting according to claim 1, characterized in that, The side surface of the disc shell (2) is provided with an elongated opening (3-5). The upper end of the insertion rod passes through the elongated opening (3-5) and is connected to the output end of the second electric telescopic rod (3-3). The side surface of the disc shell (2) is provided with a stabilizing frame (3-6). The upper end of the stabilizing frame (3-6) is vertically and movably connected to the fixing frame (1).

3. The down seeder for corn planting according to claim 2, characterized in that, The rotary feeding assembly (4) includes a rotary disk (4-1), which is rotatably connected inside the disk shell (2). The rotary disk (4-1) is driven to rotate by electricity. A central groove (4-2) is provided on the side surface of the rotary disk (4-1). The lower insertion rod (3-4) is located in the central groove (4-2). Several through cavities (4-3) are provided around the inside of the rotary disk (4-1).

4. The seed drop device for corn planting according to claim 3, wherein, The side surface of the disc shell (2) is provided with an inlet tube (4-4), and the inner surface of the cavity (4-3) is provided with a connecting interface (4-5). The connecting interface (4-5) can communicate with the inlet tube (4-4). Both ends of the cavity (4-3) are open structures, and the lower insertion rod (3-4) can pass through the cavity (4-3).

5. The down seeder for corn according to claim 4, wherein The central groove (4-2) is provided with a partition (4-6), which passes through the long opening (3-5) and is fixedly connected to the connecting frame (3-2). The bottom of the disc shell (2) is provided with an insertion tube (4-7), which is located at the vertical axis of the notification with the lower insertion rod (3-4).

6. The down seeder for corn according to claim 5, wherein The insertion tube (4-7) has side openings (4-8) on both sides of its bottom. A baffle plate (4-9) is rotatably connected to the side opening (4-8) via a pin. The baffle plate (4-9) is connected to the pin via a torsion spring. The lower end of the lower insertion rod (3-4) has a tapered cross-section.

7. The down seeder for corn according to claim 4, wherein A telescopic connecting pipe (5) is provided at the upper end of the inlet pipe (4-4).

8. The corn planter shoe of Claim 1, wherein, The fixing frame (1) has an overall L-shaped structure, and several fixing holes (6) are provided at both ends of the side surface of the fixing frame (1).

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