seed guiding and furrowing mechanism

Abstract

The invention relates to agricultural machinery, in particular to a seed guiding and furrowing mechanism. A gap exists between two seed guiding plates, and the outlet end of a seed guiding tube is located between the two seed guiding plates. The inlet end of the seed guiding tube is located in front of the outlet end of the seed guiding tube. The seed guiding tube is in the shape of a trochoid. An air inlet tube is connected to the upper end of the seed guiding tube, and flowing gas is filled into the seed guiding tube through the air inlet tube. The seed guiding and furrowing mechanism integrates furrowing, seed guiding and soil covering, forms suitable seed guiding tracks and furrows, ensures zero speed seed dropping and prevents bouncing, and ensures the uniformity of the seed spacing.

Description

Technical Field

[0001] This invention relates to agricultural machinery, and in particular to a seed-guiding and ditching mechanism. Background Technology

[0002] Sowing is a crucial step in vegetable production, involving significant labor intensity, accounting for approximately 30-40% of the total work. The quality of sowing directly impacts the production cost, yield, and quality of vegetables. With the rise and development of agricultural machinery, higher demands have been placed on the precision and uniformity of sowing. The main component affecting sowing uniformity is the seed guiding and furrowing mechanism, which plays a vital role in improving sowing precision.

[0003] Existing vegetable sowing technologies and equipment often suffer from problems such as inconsistent seed placement, easy collision with the seed delivery tube wall, and easy bouncing of fallen seeds. These issues affect the uniformity of seed spacing and sowing quality, as well as the seed growth environment, and consequently, the yield of vegetables. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects in the existing technology and propose a seed-guiding and furrowing mechanism that integrates furrowing, seed guiding and soil covering, forming a suitable seed guiding trajectory and furrow shape, ensuring zero-speed seed drop and preventing bouncing, and ensuring the uniformity of seed spacing.

[0005] The technical solution of this invention is: a seed-guiding trenching mechanism, comprising two seed-guiding plates with a gap between them, the outlet end of a seed-guiding tube located between the two seed-guiding plates, wherein the inlet end of the seed-guiding tube is located in front of the outlet end of the seed-guiding tube, and the seed-guiding tube is cycloidal in shape, with the cycloidal equation being:

[0006] y = 3.643e-8x 4 -3.017e-5x 3 +0.01034x 2 -2.014x+193.1,

[0007] The upper end of the seed tube is connected to an air inlet pipe, through which flowing gas is introduced into the seed tube.

[0008] In this invention, the two seed guide plates are fixedly connected by the top plate above them;

[0009] The front end of the seed guide plate is fixedly connected to the shark fin-shaped furrow opener, and the rear end of the top plate is connected to the whale tail-shaped soil coverer.

[0010] The top plate is provided with a long strip groove, which is connected to the gap between the two seed guide plates;

[0011] The top of the seed guide tube is the inlet end, which is connected to the seeding mechanism of the seeding device. The bottom of the seed guide tube is the outlet end, which is located between the two seed guide plates. The seed guide tube passes through the long strip groove of the top plate.

[0012] The gas forms turbulence inside the seed delivery tube, and the turbulence accelerates the movement of the seeds inside the seed delivery tube as they move.

[0013] Furthermore, when the seed leaves the outlet end of the seed delivery tube, the direction of the seed's movement is opposite to the direction of the mechanism's movement.

[0014] The top plate has a rectangular cross-section, and connecting plates that are connected to the sowing device are fixed at the four vertices of the top plate.

[0015] The front end of the shark fin-shaped furrow opener is an arc-shaped furrowing blade, and the rear end of the shark fin-shaped furrow opener is fixedly connected to the seed guide plate.

[0016] The shark fin-shaped grooving tool has two symmetrical concave cutting edges on its arc-shaped side facing the direction of movement, which extend along the arc of the grooving tool.

[0017] A soil cover connecting plate is fixed to the bottom surface of the rear end of the top plate. The top of the whale tail-shaped soil cover is connected to the soil cover connecting plate through a rotating shaft, and a spring is provided on the outer ring of the rotating shaft.

[0018] The bottom surface of the whale tail-shaped cover has two ends that are bent into pointed tips in the direction of movement, and the middle part of the bottom surface of the whale tail-shaped cover has an arc-shaped groove.

[0019] The beneficial effects of this invention are:

[0020] (1) The seed-guiding and ditching mechanism described in this application sequentially realizes the actions of ditching, seeding, and backflow covering soil;

[0021] (2) By reasonably setting the shape of the guide tube, the seeds can travel for the same amount of time in the guide tube. At the same time, by coordinating the airflow in the air inlet tube, it can effectively prevent the seeds from bouncing in the guide tube. It can also control the flow rate of the airflow to make the seeds fall at zero speed when they leave the guide tube. With the cooperation of the above aspects, the uniformity of the seed spacing is guaranteed.

[0022] (3) The shark fin-shaped trencher can easily cut soil and grass during the trenching process. The trench shape formed during the trenching process can significantly reduce the contact bounce and rolling of seeds after they fall to the ground, resulting in less digging resistance.

[0023] (4) The whale tail-shaped soil cover can effectively guide the flow of soil, realize the return of soil, and reduce soil congestion and adhesion. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 This is a top view of the structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the first three-dimensional mechanism of the present invention;

[0027] Figure 4 yes Figure 3 Enlarged view of section A in the image;

[0028] Figure 5 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0029] Figure 6 yes Figure 5 A magnified view of section B in the image.

[0030] In the diagram: 1 Seed guide frame; 2 Top plate; 201 Long strip groove; 202 Connector; 203 Covering device connecting plate; 3 Shark fin shaped furrow opener; 301 Furrow opener; 302 Concave cutting edge; 4 Seed guide tube; 5 Whale tail shaped covering device; 6 Air inlet pipe; 7 Rotary shaft; 8 Spring. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] like Figures 1 to 3 As shown, the seed guiding and furrowing mechanism of the present invention includes a seed guiding frame 1, with a top plate 2 fixed to the top surface of the seed guiding frame 1. The top plate 2 connects the entire mechanism to the frame of the sowing device. The front end of the seed guiding frame 1 is fixedly connected to a shark fin-shaped furrow opener 3. The lower end of the seed guiding tube 4 is located inside the seed guiding frame 1. The rear end of the seed guiding plate 2 is connected to a whale tail-shaped soil covering device 5.

[0034] In this application, the seed guide frame 1 includes two parallel seed guide plates 6 with a certain gap between them, and the lower end of the seed guide tube 4 is located within this gap. The two seed guide plates 6 are connected by a top plate 2 above them. The top plate 2 is provided with an elongated groove 201, which communicates with the gap between the two top plates 2. Therefore, the seed guide tube 4 passes through the elongated groove 201 and extends between the two seed guide plates. The top plate 2 is provided with a connector 202 that connects to the frame, and the connection between the mechanism and the sowing device is achieved through the connector 202. During the movement of the sowing device, the mechanism is driven to move accordingly, and the mechanism performs actions such as furrowing and seed placement during its forward movement. In this embodiment, the top plate 2 has a rectangular cross-section, and connectors 202 are fixed at the four vertices of the top plate 2.

[0035] The seed guide tube 4 is inserted into the seed guide plate from the front end of the mechanism. The upper end of the seed guide tube 4 is connected to the seed metering mechanism in the sowing device. The top end of the seed guide tube 4 is the inlet, and the bottom end is the outlet. The inlet is located in front of the outlet. An air inlet pipe 6 is connected to the upper end of the seed guide tube 4. Airflow is blown into the seed guide tube 4 through the air inlet pipe 6, and the direction of airflow is opposite to the direction of movement of the mechanism.

[0036] Seeds entering the seed guide tube 4 are propelled by the airflow, moving continuously from the front to the rear of the tube. When a seed exits the seed guide tube from the rear, it possesses a certain speed, and its direction of movement is opposite to the direction of the mechanism's movement. By controlling the airflow within the air inlet pipe 6, the speed at which the seed exits the seed guide tube can be accurately controlled.

[0037] By incorporating an air inlet pipe and introducing airflow into the seed guide tube, turbulence is created within the tube. This turbulence accelerates the seeds' movement along the tube without causing them to bounce randomly. Without airflow assistance, as seeds fall into the seed guide tube and slide down its wall, their high falling speed causes them to collide with the tube wall and bounce, directly affecting the time interval between seeds and thus the uniformity of seed spacing. In this application, with the assistance of airflow, the seeds in the seed guide tube flow smoothly out, ensuring a proper time interval between the falling seeds.

[0038] On the other hand, by adjusting the airflow speed, the velocity of the seed leaving the seed guide tube can be adjusted. Therefore, in practical work, the horizontal component of the seed's velocity leaving the seed guide tube outlet can be made equal in magnitude and opposite in direction to the velocity of the mechanism's forward movement, based on the actual movement speed of the mechanism. At this time, the velocity of the seed leaving the seed guide tube outlet is essentially approximately zero, achieving zero-velocity seeding. This allows the seed to fall almost vertically into the soil below the seed guide tube outlet after leaving the seed guide tube, thus achieving accurate control over the seed landing location.

[0039] Based on the above analysis, it can be seen that by setting up the air inlet pipe in this application, the seeds falling into the seed guide tube can be controlled by the airflow and fall into the soil at certain time intervals. Moreover, the position of the seeds falling into the soil after leaving the seed guide tube is controllable, thereby ensuring the uniformity of the seed spacing of the two types of seeds during the seed falling process.

[0040] In this application, the seed guide tube 4 is cycloidal, and its cycloidal equation is:

[0041] y = 3.643e-8x 4 -3.017e-5x 3 +0.01034x 2 -2.014x+193.1,

[0042] Once a seed enters the seed guide tube 4, regardless of its initial position, the time required for the seed to travel from its entry into the tube to its exit at the bottom is always the same, ensuring that all seeds have the same transport time within the tube. The seed guide tube 4, with its cycloidal shape, works in conjunction with the air inlet tube 6 to further guarantee the uniformity of seed spacing during sowing, thus improving the sowing effect.

[0043] The front end of the shark fin grooving tool 3 is an arc-shaped grooving knife 301. The rear end of the shark fin grooving tool 3 is fixedly connected to the seed guide plate 6. The shark fin grooving tool 3 has two symmetrically arranged concave cutting blades 302 on the side facing the direction of movement. The two concave cutting blades extend along the arc direction of the grooving knife and penetrate through the front side of the shark fin grooving tool.

[0044] The trenching blade 301, located at the front end of the shark fin-shaped trencher 3, serves to cut the soil and break the grass. The trenching blade 301 is arc-shaped and its central angle is obtuse. Obtuse angle trenching ensures the stability of trenching depth.

[0045] When the shark fin-shaped furrow opener 3 comes into contact with the soil, the furrowing blade 301 first cuts the soil, and then the symmetrically arranged concave cutting edges 302 on both sides compress the soil, thereby forming a stable narrow furrow shape within the soil. The formed furrow shape provides flexible contact conditions for the seeds as they fall, reducing the bounce and rolling of the seeds after they fall, and creating less digging resistance. After the seeds fall from the outlet of the seed guide tube, they fall directly into the narrow furrow formed by the shark fin-shaped furrow opener 3.

[0046] The tail of the device is equipped with a whale tail-shaped soil cover 5, such as Figure 5 and Figure 6 As shown, the shape of the cover is that of a whale tail. The bottom surface of the rear end of the top plate 2 is fixed with a cover connecting plate 203. The top of the whale tail-shaped cover 5 is connected to the cover connecting plate 203 through a rotating shaft 7. A spring 8 is wound on the rotating shaft 7.

[0047] The two ends of the bottom surface of the whale tail-shaped cover 5 are pointed tips that bend in the direction of movement of the mechanism, and the middle of the bottom surface of the whale tail-shaped cover 5 is an arc-shaped groove.

[0048] When the whale-tail shaped cover 5 comes into contact with the soil, its pointed ends on both sides insert into the soil, pushing the soil on both sides up and converging it towards the center of the whale-tail shaped cover 5. At the same time, the arc-shaped groove in the center of the whale-tail shaped cover 5 completes the leveling of the soil. Therefore, the whale-tail shaped cover 5 can effectively guide the flow of soil.

[0049] When encountering large rocks or soil blockage, the whale-tail-shaped soil cover 5, upon contact with these objects, will be unable to move forward due to the resistance. At this point, the top of the whale-tail-shaped soil cover 5 will swing around the pivot 7, generating torque from the spring 8 wrapped around the annular shape of the pivot 7. After swinging a certain angle, the bottom of the whale-tail-shaped soil cover 5 will bypass the large rocks or soil blockage, ensuring the entire mechanism can continue moving forward. When the whale-tail-shaped soil cover 5 is no longer in contact with large rocks or soil blockage, the spring 8 will automatically reset it, reducing blockage and soil adhesion to the entire mechanism.

[0050] The working principle of this mechanism is as follows. As the sowing device advances, the shark fin-shaped furrow opener 3 at the forefront first contacts the soil. The furrowing action is achieved through the furrowing blade 301 and the concave cutting edge 302 on the shark fin-shaped furrow opener 3. A seed-dropping area is formed at the seed guide frame 1. After the seeds fall along the seed guide tube 4 behind the shark fin-shaped furrow opener 3, they fall directly into the seed furrow formed by the shark fin-shaped furrow opener 3 within the seed-dropping area, without being squeezed by the soil on both sides. Subsequently, with the assistance of the whale tail-shaped soil covering device 5, soil backflow is achieved, providing a certain degree of soil coverage for the seeds in the seed furrow. In actual operation, the multiple seed-guiding and furrowing mechanisms described in this invention work in parallel and simultaneously, completing the work of soil separation, seed drop, and backflow at the same time.

[0051] The seed-guiding trenching mechanism provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A seed-guiding trenching mechanism, comprising two seed-guiding plates with a gap between them, and an outlet end of a seed-guiding tube located between the two seed-guiding plates, characterized in that, The inlet end of the seed guide tube is located in front of the outlet end of the seed guide tube. The seed guide tube is cycloidal in shape, and its cycloidal equation is: ， The upper end of the seed guide tube is connected to an air inlet pipe, through which flowing gas is introduced into the seed guide tube. The gas forms turbulence in the seed guide tube. During the movement of the seed in the seed guide tube, the turbulence causes the seed in the seed guide tube to move faster. Moreover, when the seed leaves the outlet end of the seed guide tube, the direction of the seed's movement is opposite to the direction of the mechanism's movement. The two seed guide plates are fixedly connected by the top plate above; the front end of the seed guide plate is fixedly connected to the shark fin-shaped furrow opener, and the rear end of the top plate is connected to the whale tail-shaped soil coverer. The front end of the shark fin-shaped trencher is an arc-shaped trenching blade, and the rear end of the shark fin-shaped trencher is fixedly connected to the seed guide plate; the shark fin-shaped trencher has two symmetrical concave cutting edges on the arc-shaped side facing the direction of movement, and the concave cutting edges extend along the arc direction of the trenching blade.

2. The seed-guiding trenching mechanism according to claim 1, characterized in that, The top plate is provided with a long strip groove, which is connected to the gap between the two seed guide plates; The top of the seed guide tube is the inlet end, which is connected to the seeding mechanism of the seeding device. The bottom of the seed guide tube is the outlet end, which is located between the two seed guide plates. The seed guide tube passes through the long strip groove of the top plate.

3. The seed-guiding trenching mechanism according to claim 1, characterized in that, The top plate has a rectangular cross-section, and connecting plates that are connected to the sowing device are fixed at the four vertices of the top plate.

4. The seed-guiding trenching mechanism according to claim 1, characterized in that, A soil cover connecting plate is fixed to the bottom surface of the rear end of the top plate. The top of the whale tail-shaped soil cover is connected to the soil cover connecting plate through a rotating shaft, and a spring is provided on the outer ring of the rotating shaft. The bottom surface of the whale tail-shaped cover has two ends that are bent into pointed tips in the direction of movement, and the middle part of the bottom surface of the whale tail-shaped cover has an arc-shaped groove.

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