A quantitative adjustment and depth control device for a handheld jujube seeding device

Abstract

This utility model discloses a quantitative adjustment and depth control device for a handheld jujube seeder. A movable adjustment rod is located above the main body rod, connected by an adjustment rod structure consisting of a first and second rod body and a rotating shaft. A handle is located at the end of the adjustment rod. An extension tube is connected to one side of the main body rod, above which is a feeding structure composed of a support plate, a sieve plate, and an adjustment plate. The main body rod also has an insertion tube and a locking pin, and the adjustment rod has a corresponding adjustment groove. In use, the adjustment rod slides, causing the adjustment rod structure to move, which in turn pushes the sieve plate to rotate, thus conveying the seeds. The distance between the adjustment plate and the sieve plate is adjustable to control the feeding amount. The locking pin and the adjustment groove work together to adjust the sowing depth. The main body rod and adjustment rod are made of high-strength aluminum alloy, while the sieve plate and other components are made of food-grade engineering plastics.

Description

Technical Field

[0001] This utility model provides a handheld jujube seeding device, and particularly relates to a quantitative adjustment and depth control device for the handheld jujube seeding device. Background Technology

[0002] In agricultural planting, seeders, as devices used to precisely sow seeds into the soil at specific intervals and depths, play a crucial role in improving sowing efficiency and ensuring uniform crop growth. They effectively reduce seed waste and enhance crop germination rate and growth quality, making them particularly suitable for planting cash crops such as jujubes.

[0003] Existing handheld jujube seeders typically consist of a main rod, a seed head, and a simple feeding port. The main rod is used for handheld operation, the seed head is inserted into the soil to complete the sowing action, and the seeds fall directly into the soil through the simple feeding port. However, this structure has several shortcomings. First, the quantitative sowing precision is insufficient, relying heavily on manual experience to control the amount of material, resulting in uneven germination rates. Second, it is difficult to adapt to different soil textures, and the sowing depth is inconvenient to adjust. Third, the operation process is complex, requiring both hands to work together to complete actions such as inserting the seed head and feeding the seed, resulting in low efficiency. Fourth, the seeds are easily damaged by compression during the sieving and feeding process. Utility Model Content

[0004] In order to solve the above problems, this application provides a quantitative adjustment and depth control device for a handheld jujube seeder, which solves the problems of low seeding accuracy, inconvenient depth adjustment, complicated operation and high seed damage rate of existing equipment.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a quantitative adjustment and depth control device for a handheld jujube seeder, including a main rod, an adjustment rod movably provided above the main rod, an adjustment rod structure provided between the adjustment rod and the main rod, an expansion tube forked on one side of the main rod, and a feeding structure connected to the expansion tube above the expansion tube.

[0006] The feeding structure includes a support plate sleeved on the end of the expansion tube away from the main rod, and a movably mounted screening plate on the other side of the support plate, with an adjustment plate penetrating through the screening plate.

[0007] Preferably, the end of the main rod away from the adjusting rod is provided with a corresponding insertion tube for insertion into the soil, and the end of the main rod near the adjusting rod is provided with a locking pin that penetrates itself. The adjusting rod is provided with an adjusting groove corresponding to the locking pin.

[0008] Preferably, the end of the adjusting rod away from the main rod is fixedly provided with a handle.

[0009] Preferably, the adjusting rod structure includes a first rod body movably mounted on the adjusting rod and a second rod body movably mounted on the main rod, wherein the first rod body and the second rod body are movably connected by a rotating shaft.

[0010] Preferably, the screening plate is surrounded by a plurality of clamping rods evenly distributed around its perimeter, the clamping rods corresponding to the second rod body, and the screening plate is located between the adjusting plate and the supporting plate.

[0011] Preferably, the adjusting plate is fixedly connected to a fixing rod that passes through the center of the screening plate and the support plate at one end near the support plate. The fixing rod is fitted with a tapered sleeve that is fixedly connected to the support plate. A locking bolt is fitted to the end of the tapered sleeve away from the support plate to lock the fixing rod at different positions, thereby changing the distance between the adjusting plate and the screening plate.

[0012] Preferably, the screening plate is provided with a plurality of uniformly distributed through holes that correspond to the expansion tube and penetrate the screening plate.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] This device uses a manually operated adjusting rod that slides up and down relative to the main rod, driving the adjusting rod structure to fold and swing. Specifically, the adjusting rod drives the first rod to move, which in turn links with the second rod via a rotating shaft, causing the second rod to push the screening plate to rotate around the fixed rod. When the screening plate rotates, the evenly distributed through holes on its surface create relative displacement with the seeds within the feeding structure, causing the seeds to move towards the expansion tube and be quantitatively fed through the through holes corresponding to the expansion tube. Simultaneously, the adjusting plate, through the fixed rod and the conical sleeve, allows adjustment of the distance between itself and the screening plate using locking bolts, thereby changing the effective cross-sectional area of ​​the seeds passing through the through holes and achieving precise control of the amount of material fed in a single operation.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a quantitative adjustment and depth control device for a handheld jujube seeding device according to the present invention;

[0017] Figure 2 This is a partially enlarged view of the adjusting rod structure of the quantitative adjustment and depth control device for a handheld jujube seeding device according to this utility model;

[0018] Figure 3This is a partial enlarged view of the support plate of the quantitative adjustment and depth control device for a handheld jujube seeding device according to this utility model;

[0019] Figure 4 This is a cross-sectional view of the screening plate of a quantitative adjustment and depth control device for a handheld jujube seeding device according to this utility model.

[0020] As shown in the figure:

[0021] 1. Main rod; 2. Adjusting rod; 3. Adjusting rod structure; 4. Expansion tube; 5. Feeding structure; 6. Support plate; 7. Screening plate; 8. Adjusting plate; 9. Insert tube; 10. Locking pin; 11. Adjusting groove; 12. Handle; 13. First rod body; 14. Second rod body; 15. Clamping rod; 16. Fixing rod; 17. Tapered sleeve; 18. Locking bolt; 19. Through hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figure 1 and Figure 2As shown, a quantitative adjustment and depth control device for a handheld jujube planter includes an adjusting rod movably mounted above the main rod, connected by an adjusting rod structure. The adjusting rod structure consists of a first rod movably mounted on the adjusting rod and a second rod movably mounted on the main rod, connected by a rotating shaft. A handle is fixed to the end of the adjusting rod furthest from the main rod. One side of the main rod branches off to connect to an extension tube, above which is a feeding structure connected to the extension tube. One end of the main rod has an insertion tube for inserting into the soil, and the other end has a locking pin penetrating through it. The adjusting rod has a corresponding adjusting groove. The feeding structure includes a support plate fitted onto one end of the extension tube, and a screening plate movably mounted on the other side of the support plate, with an adjusting plate penetrating through it.

[0026] In this embodiment, the main rod 1 and the adjusting rod 2 form a linkage system through the adjusting rod structure 3: the upper end of the first rod 13 is hinged to the adjusting rod 2 via a pin, and the lower end is connected to the second rod 14 via a rotating shaft to form a rotating pair. The lower end of the second rod 14 is movably connected to the main rod 1 via a pin, forming a typical four-bar linkage. When the adjusting rod 2 slides along the axis of the main rod 1, the four-bar linkage converts linear motion into the oscillation of the second rod 14, with an oscillation angle range of 25°-45° limited by the length of the adjusting groove 11. The screening plate 7, through six evenly distributed locking rods 15 around its perimeter, engages with the locking groove at the end of the second rod 14 to achieve circumferential limiting and radial sliding, ensuring that the screening plate 7 rotates back and forth around the fixed rod 16 at 0-60° under the drive of the second rod 14. The adjusting plate 8 is connected to the fixed rod 16 via an M8 thread. The fixed rod 16 has a scale line with an accuracy of ±0.05mm on its surface. It is matched with the tapered sleeve 17 with an inner hole with a taper of 1:5. By tightening the locking bolt 18, the distance between the adjusting plate 8 and the screening plate 7 can be precisely adjusted from 0 to 15mm, with an adjustment accuracy of 0.1mm.

[0027] Based on the above implementation scheme, the 12 evenly distributed φ8mm through holes 19 on the sieve plate 7 of this device are precisely aligned with the feed inlet of the expansion tube 4. When the sieve plate 7 rotates, the through holes 19 and the seeds are displaced relative to each other, achieving quantitative seed extraction. By adjusting the plate 8 to change the effective height of the through holes 19, it can accommodate the 3-8mm particle size difference of jujube seeds. Actual measurements at the rated rotation speed of 25r / min show that the single-seed sowing qualification rate reaches 98.3%, and the excess seed rate is controlled within 1.2%.

[0028] The locking pin 10 on the main rod 1 and the adjusting groove 11 of the adjusting rod 2 form a 7-position adjustment and positioning, with a spacing of 1cm between each position. Combined with the tapered design of the insertion tube 9 with a cone angle of 45°, the sowing depth can be quickly adjusted according to the soil compaction index of 0.8-1.5MPa. In clay loam soil, the depth error is ≤±3mm.

[0029] The handle 12 is covered with TPR soft rubber, with a comfortable grip area diameter of 35mm. Combined with the linkage design of the adjustment rod 2 and the main rod 1, the operator can complete the soil insertion-material feeding-resetting cycle with just one hand. According to calculations, the single-person operation efficiency reaches 4200 holes / hour, which is 40% higher than traditional equipment.

[0030] The edges of the through holes 19 of the screening plate 7 are rounded with R2, and the angular velocity of the second rod 14 driving the screening plate 7 is ≤0.5rad / s, so that the shear force on the seeds during the transportation process is ≤0.8N. According to the verification of a third-party testing agency, the seed damage rate is only 0.9%, which is far lower than the industry standard of 5%.

[0031] like Figure 3 and Figure 4 As shown, the core of this handheld jujube seeder's quantitative adjustment and depth control device lies in its quantitative adjustment and depth control functions. For quantitative adjustment, the screening plate of the feeding structure has several evenly distributed through holes corresponding to the expansion tube. A locking rod surrounds the screening plate, which is located between the adjustment plate and the support plate. The adjustment plate is connected to the center of the screening plate and the support plate via a fixing rod. A tapered sleeve is fitted over the fixing rod, and locking bolts are used to lock the fixing rod at different positions, changing the distance between the adjustment plate and the screening plate to control the feeding amount. For depth control, the main rod has an insertion tube for inserting into the soil. The main rod and the adjustment rod are connected via an adjustment rod structure. The adjustment groove on the adjustment rod, in conjunction with the locking pin of the main rod, allows for adjustment of the device's insertion depth into the soil.

[0032] In this implementation plan, in actual use, this device needs to be used in conjunction with jujube seeds for sowing. The seeds can be placed in the feeding structure manually. To ensure the sowing effect, it is recommended to use high-quality jujube seeds with uniform particle size and no damage. Before sowing, the soil needs to be prepared by conventional tilling and leveling to ensure that the insertion tube 9 can be smoothly inserted into the soil. In terms of manufacturing materials, the main rod 1 and the adjusting rod 2 can be made of high-strength aluminum alloy, which can ensure structural strength and reduce the overall weight of the device, making it easy to operate by hand. The first rod 13, the second rod 14 and the rotating shaft of the adjusting rod structure 3 are made of stainless steel to enhance wear resistance and corrosion resistance and extend service life. The screening plate 7 and the adjusting plate 8 are made of food-grade engineering plastics, such as polyoxymethylene (POM), which have a smooth surface and good toughness, which can avoid damage to the seeds and facilitate the cleaning of residual seeds. In addition, the locking bolt 18 can be made of nylon locking nuts to prevent loosening due to vibration during use and ensure the stability of quantitative adjustment and depth control. When using it, the operator first adjusts the sowing depth according to the soil texture and sowing needs by cooperating the adjusting rod 2 with the main rod 1, then uses the adjusting plate 8 to set the appropriate feeding amount, and then holds the handle 12 to insert the insertion tube 9 into the soil, pushes the adjusting rod 2 to make the screening plate 7 rotate, and completes a precise sowing operation. By repeating this cycle, efficient jujube sowing operations can be achieved.

[0033] Specifically, during installation, the first rod 13 of the adjusting rod structure 3 is first assembled with the pre-set U-shaped groove on the adjusting rod 2 via a hinged bushing and fixed with pins to ensure flexible rotation. The second rod 14 is fixedly connected to the main rod 1 via welding to a bearing seat, and then a rotating shaft passes through the bearing seat to achieve a movable connection. The expansion tube 4 and the main rod 1 adopt a socket structure and form a strong and sealed connection through hot-melt welding. The support plate 6 of the feeding structure 5 is fitted onto the end of the expansion tube 4 with an interference fit and reinforced with AB glue. The clamping rod 15 of the screening plate 7 is embedded in the corresponding groove of the second rod 14 and is axially limited by an elastic retaining ring. The fixing rod 16 of the adjusting plate 8 passes through the center holes of the screening plate 7 and the support plate 6 in sequence, and is threaded into the tapered sleeve 17. The locking bolt 18 is tightened to a torque of 15 N·m using a torque wrench.

[0034] Before use, the soil compaction needs to be determined using existing soil testing equipment. Based on the test results, the insertion depth of the insertion tube 9 is adjusted within the range of 5-15cm using the locking pin 10 and adjusting groove 11 between the adjusting rod 2 and the main rod 1. After pouring the jujube seeds into the feeding structure 5, the seed size is measured using existing vernier calipers. Referring to the preset adjustment scale of the device, the distance between the adjusting plate 8 and the sieve plate 7 is adjusted by rotating the locking bolt 18 to accommodate seeds of different sizes. During operation, the operator holds the handle 12 and inserts the insertion tube 9 vertically into the soil. The pushing force of the operator's arm drives the adjusting rod 2 to slide along the main rod 1. The four-bar linkage of the adjusting rod structure 3 converts the linear motion into the swing of the second rod 14, which in turn drives the sieve plate 7 to rotate, allowing the seeds to fall through the through hole 19 of the sieve plate 7 into the expansion tube 4, and finally into the soil through the main rod 1. After sowing, existing cleaning tools such as brushes can be used to disassemble the sieve plate 7 and clean the feeding structure 5 for future use.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A quantitative adjustment and depth control device for a handheld jujube seeding device, comprising a main rod (1), characterized in that: An adjusting rod (2) is movably provided above the main rod (1), and an adjusting rod structure (3) is provided between the adjusting rod (2) and the main rod (1). An expansion tube (4) is bifurcated on one side of the main rod (1), and a feeding structure (5) connected to itself is provided above the expansion tube (4). The feeding structure (5) includes a support plate (6) sleeved on one end of the expansion tube (4) away from the main rod (1), and a movably mounted screening plate (7) on the other side of the support plate (6), and an adjustment plate (8) penetrating through the screening plate (7).

2. The quantitative adjustment and depth control device for a handheld jujube seeding device according to claim 1, characterized in that: The main rod (1) has a corresponding insertion tube (9) at the end away from the adjusting rod (2). The insertion tube (9) is used to insert into the soil. The main rod (1) has a locking pin (10) that passes through itself at the end near the adjusting rod (2). The adjusting rod (2) has an adjusting groove (11) that corresponds to the locking pin (10).

3. The quantitative adjustment and depth control device for a handheld jujube seeding device according to claim 1, characterized in that: The adjusting rod (2) has a handle (12) fixed at the end away from the main rod (1).

4. The quantitative adjustment and depth control device for a handheld jujube seeding device according to claim 1, characterized in that: The adjusting rod structure (3) includes a first rod (13) movably mounted on the adjusting rod (2) and a second rod (14) movably mounted on the main rod (1). The first rod (13) and the second rod (14) are movably connected by a rotating shaft.

5. The quantitative adjustment and depth control device for a handheld jujube seeding device according to claim 4, characterized in that: The screening plate (7) is surrounded by several clamping rods (15) evenly distributed around it. The clamping rods (15) correspond to the second rod body (14). The screening plate (7) is located between the adjusting plate (8) and the supporting plate (6).

6. The quantitative adjustment and depth control device for a handheld jujube seeding device according to claim 1, characterized in that: The adjusting plate (8) is fixedly connected to a fixing rod (16) that passes through the center of the screening plate (7) and the support plate (6) at one end near the support plate (6). The fixing rod (16) is fitted with a tapered sleeve (17) that is fixedly connected to the support plate (6). A locking bolt (18) is fitted at the end of the tapered sleeve (17) away from the support plate (6) to lock the fixing rod (16) at different positions and thus change the distance between the adjusting plate (8) and the screening plate (7).

7. The quantitative adjustment and depth control device for a handheld jujube seeding device according to claim 1, characterized in that: The sieve plate (7) is provided with several uniformly distributed through holes (19) that correspond to the expansion tube (4) and penetrate the sieve plate (7).

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