A special one-machine two-row groove wheel seed metering device for cyrtosperma macencorymba

Abstract

The utility model discloses a special one ware two row nest eye wheel type seed metering device of cyperus esculeutus belongs to agricultural machinery technical field, include: box, its top is equipped with the seed inlet, and bottom is equipped with two independent seed delivery pipe, seed metering wheel, it rotatable is established in the box, the circumference surface of seed metering wheel is evenly distributed with multiple group type hole, and the outline of type hole is half elliptical spherical, the outer periphery of seed metering wheel with the corresponding region of seed delivery pipe constitutes the seed throwing area, guide seed device, establish in the top of seed metering wheel, for guiding seed to type hole, clear seed mechanism, including the clear seed cutter tooth cooperation with the type hole area of seed metering wheel. The utility model example's a special one ware two row nest eye wheel type seed metering device of cyperus esculeutus, through split type seed metering wheel and collaborative parameter optimization, has realized to cyperus esculeutus's high accuracy, high efficiency and low cost sowing, effectively solved the existing seed metering device's poor adaptability, efficiency cost contradiction and the core problem of single function.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a two-row, single-hole seed metering device for tiger nuts. Background Technology

[0002] In agricultural sowing operations, the seed metering device is the core component of the seeder, and its performance directly determines the sowing quality. Currently, seed metering devices on the market are mainly divided into two categories: mechanical and pneumatic.

[0003] Mechanical seed metering devices (such as the eye-wheel type and spoon type) are simple in structure and low in cost, but they have poor adaptability to seed size and shape. In particular, the common eye-wheel seed metering device has a fixed shape and size of the eye (orifice). For irregularly shaped seeds like tiger peas with large size variations, the fixed orifice of this type of eye-wheel causes serious double-seeding and missed-seeding during filling, resulting in poor seed uniformity. This makes it impossible to accurately control the number of seeds in the final hole, thus failing to meet the precision seeding requirements of tiger peas for "multiple seeds per hole" and a stable and controllable number of seeds per hole. Furthermore, during seeding, irregularly shaped seeds are easily stuck in the orifice of existing eye-wheels, making reliable seeding impossible and further increasing the missed-seeding rate.

[0004] Pneumatic seed metering devices (such as air suction and pneumatic pressure types) adsorb seeds using negative or positive pressure airflow, offering good adaptability to seed shape and high sowing precision. However, these seed metering devices have complex structures, high manufacturing and maintenance costs, and high energy consumption during operation, which contradicts the actual needs of vast areas of my country for low-cost and highly reliable agricultural machinery.

[0005] Furthermore, existing seed metering devices are limited in function, typically only capable of completing one row of sowing, resulting in low efficiency. Currently, there is a lack of a dedicated seed metering device with a seed-growing wheel specifically designed for the characteristics of tiger nut seeds and capable of efficient "one device for two rows" operation. Therefore, there is a need in this field for a dedicated seed metering device that combines high adaptability, high operating efficiency, low cost, and low damage. Utility Model Content

[0006] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a two-row, single-unit seed metering device specifically for tiger nuts. Through the split seed metering wheel and coordinated parameter optimization, it achieves high-precision, high-efficiency, and low-cost sowing of tiger nuts, effectively solving the core problems of poor adaptability, efficiency-cost contradiction, and single function of existing seed metering devices.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A single-machine, two-row, single-eye wheel-type seed metering device for tiger nuts is provided, comprising: The box has a seed inlet at the top and two independent seed delivery pipes at the bottom. A seed metering wheel is rotatably disposed in the housing. The circumferential surface of the seed metering wheel is evenly distributed with multiple sets of shaped holes, the outline of which is a semi-elliptic sphere. The outer periphery of the seed metering wheel and the corresponding area of ​​the seed delivery tube constitute the seed feeding area. A seed guiding device, located above the seed metering wheel, is used to guide the seeds into the shaped hole; The seed cleaning mechanism includes seed cleaning blades that mate with the orifice area of ​​the seed metering wheel.

[0008] Furthermore, the seeding wheel is composed of a left half wheel and a right half wheel, and the shaped hole is composed of half-shaped holes respectively set on the left half wheel and the right half wheel.

[0009] Furthermore, the end of the seed-cleaning blade extends into the joint gap between the left and right halves of the wheel and is located on one side of the seeding area.

[0010] Furthermore, both the left and right half-wheels are provided with a non-circular connecting hole at their center, which is used to cooperate with the non-circular output shaft of the drive system to transmit torque.

[0011] Furthermore, the cross-section of the non-circular connecting hole and the output shaft is polygonal or spline-shaped.

[0012] Furthermore, the inlet of the hole is provided with a seed guide chamfer, and the inclination angle of the seed guide chamfer is 40°-50°.

[0013] Furthermore, the shaped hole is provided in four sets.

[0014] Furthermore, the seed guiding device includes a seed guide plate, a baffle, and a brush; the seed guide plate is fixed inside the box, with its upper end receiving the seed inlet and its lower end extending to the surface near the seed metering wheel; the baffle is disposed outside the outlet of the seed guide plate, and the brush is disposed inside the baffle, with its bristles maintaining slight contact with the surface of the seed metering wheel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a two-row, single-hole seed metering device specifically for tiger nuts. It adopts a semi-elliptical spherical hole based on tiger nut design and combines it with a 40°-50° seed-guiding chamfer to provide the best space for accommodating and guiding a single seed, thus achieving stable and precise single-seed filling. 2. The present invention provides a two-row, single-piece seed metering device for tiger nuts. The seed metering wheel is composed of a left half wheel and a right half wheel. The end of the seed cleaning blade extends into the joint between the left and right half wheels. This design allows the seed cleaning blade to directly act on the seeds stuck at the joint of the seed hole, applying an effective downward force to force them to be planted. 3. The present invention provides a two-row seed metering device for tiger nuts, which is based on the design concept of "one device for two rows". Two independent seed delivery pipes are set at the bottom of the box, so that a single seed metering device can complete the sowing of two rows simultaneously. 4. In this utility model example, a two-row, single-machine seed metering device for tiger nuts is provided. The left and right half-wheels are connected to the output shaft through a non-circular connecting hole in their center, forming a stable anti-rotation connection. 5. The present invention provides a two-row, single-piece seed metering device for tiger nuts, which has four sets of holes evenly distributed circumferentially on the seed metering wheel. This ensures the continuity and smoothness of the seed metering device's operation, eliminates the vibration and imbalance caused by pulse seeding, and lays the foundation for further improving the rotation speed and efficiency. 6. The present invention provides a two-row, single-hole wheel-type seed metering device specifically for tiger nuts, which adopts a purely mechanical structure, completely avoiding the complex structure and high energy consumption of pneumatic seed metering devices such as fans and air ducts. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 This is a schematic diagram of the internal structure of the box; Figure 3 This is a schematic diagram of the seeding reel structure; Figure 4 This is a schematic diagram of the seed-guiding device. Figure 5 This is a schematic diagram of the seed cleaning mechanism and seed delivery tube structure.

[0017] In the diagram: 1-box body, 2-seed inlet, 3-seed conveying pipe, 4-seed feeding wheel, 41-left half wheel, 42-right half wheel, 5-type hole, 6-seed feeding area, 7-seed cleaning blade, 8-output shaft, 9-seed guide chamfer, 10-brush, 11-baffle, 12-seed guide plate. Detailed Implementation

[0018] The present application 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 relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-5 As shown, this embodiment provides a two-row seed metering device for tiger nuts, which mainly includes a housing 1, a seed metering wheel 4, a seed guiding device, and a seed cleaning mechanism.

[0021] The housing 1 forms the main outer shell of the seed metering device, with a seed inlet 2 at the top for receiving tiger pea seeds from the seed box. The bottom of the housing 1 has two independent and symmetrical seed delivery pipes 3, corresponding to two rows of sowing operations respectively.

[0022] The box 1 forms the main shell of the seed metering device, and its top is provided with a seed inlet 2 for receiving tiger pea seeds from the seed box. The bottom of the box 1 is provided with two independent and symmetrical seed delivery pipes 3, which correspond to two rows of sowing operations respectively.

[0023] The seed metering wheel 4 is rotatably mounted inside the housing 1 via bearings. Four sets of shaped holes 5 are evenly distributed circumferentially on the circumferential surface of the seed metering wheel 4, each set containing 13 holes 5. The outline of each shaped hole 5 is a semi-elliptic sphere, and its specific dimensions are optimized based on the triaxial dimensions of tiger pea seeds, preferably 18mm in length, 16mm in width, 13mm in height, and 14.1mm in depth, to ensure stable containment of a single seed. A seed-guiding chamfer 9 is machined at the entrance of each shaped hole 5, with an inclination angle of 40°-50° and an axial length preferably of 2.65mm (adjustable within the range of 2.5mm to 3.2mm). This structure effectively guides the seeds into the shaped holes 5, improving filling efficiency. The area corresponding to the outer circumference of the seed metering wheel 4 and the two seed delivery tubes 3 constitutes the seeding area 6. When the shaped holes 5 rotate with the seed metering wheel 4 to this area, the seeds fall into the seed delivery tubes 3 under gravity.

[0024] The seed guiding device is positioned above the seed metering wheel 4 to guide seeds evenly and smoothly into the seed hole 5. Specifically, the seed guiding device includes a seed channel plate 12, a baffle 11, and a brush 10. The seed channel plate 12 is fixed inside the housing 1, with its upper end receiving the seed inlet 2 and its lower end extending to the surface near the seed metering wheel 4. The baffle 11 is positioned outside the outlet of the seed channel plate 12, and the brush 10 is positioned inside the baffle 11, with its bristles maintaining slight contact with the surface of the seed metering wheel 4. The brush 10 can remove excess seeds outside the seed hole 5, ensuring high precision per seed.

[0025] The seed cleaning mechanism includes a seed cleaning blade 7, which is mounted on the housing 1 via a fixed base, and the working part at its end engages with the shaped hole 5 area of ​​the seed metering wheel 4.

[0026] The seed metering wheel 4 in this embodiment adopts a split structure, consisting of a left half-wheel 41 and a right half-wheel 42 joined together axially. The shaped hole 5 is composed of half-shaped holes precisely machined on the mating surfaces of the left half-wheel 41 and the right half-wheel 42. Correspondingly, the end of the seed cleaning blade 7 extends into the joint gap between the left half-wheel 41 and the right half-wheel 42. When a seed is stuck in the shaped hole 5 and cannot be ejected by gravity, the seed metering wheel 4, rotated to this position, will cause the seed cleaning blade 7 to apply a downward oblique force to the stuck seed, pushing it into the seed delivery tube 3, thereby completely solving the seed jamming problem.

[0027] To ensure synchronous rotation and reliable drive of the split seed metering reel 4, a regular pentagonal connecting hole is machined at the center of both the left half-reel 41 and the right half-reel 42. An output shaft 8 with a matching regular pentagonal cross-section extends from the drive system and passes through the pentagonal connecting hole. By tightening the nuts at the ends, the left half-reel 41 and the right half-reel 42 are pressed against the output shaft 8, thus achieving synchronous drive without relative rotation. The output shaft 8 drives the seed metering reel 4 to rotate at a uniform speed at the optimal operating speed of 32 r / min.

[0028] During operation, tiger nut seeds enter through the seed inlet 2, converge at the baffle 11 of the seed guiding device, and are filled into the orifices 5 of the seed metering wheel 4 under the synergistic action of the baffle 11 and the brush 10. Driven by the output shaft 8, the seed metering wheel 4 rotates at a constant speed. The orifices 5 carrying seeds pass sequentially through the seed cleaning mechanism, where the cleaning blades 7 ensure that each orifice 5 carries only one seed. When the orifice 5 rotates to the seeding area 6, the seed detaches from the orifice 5 under gravity and falls into the corresponding seed delivery tube 3, completing the sowing process. Throughout the process, the combination of the separate seed metering wheel 4 and the cleaning blades 7 ensures absolute reliability of seeding, while the "one device, two rows" design doubles the operational efficiency.

[0029] Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-mentioned technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-mentioned technical features or their equivalent features without departing from the inventive concept. For example, technical solutions formed by substituting the above-mentioned features with technical features disclosed in this application (but not limited to) that have similar functions.

Claims

1. A two-row, single-hole seed metering device specifically for tiger nuts, characterized in that, include: The box (1) has a seed inlet (2) at the top and two independent seed delivery pipes (3) at the bottom. The seed metering wheel (4) is rotatably disposed in the box (1). The circumferential surface of the seed metering wheel (4) is evenly distributed with multiple sets of shaped holes (5), and the outline of the shaped holes (5) is a semi-elliptic sphere. The outer periphery of the seed metering wheel (4) and the corresponding area of ​​the seed delivery tube (3) constitute the seeding area (6). A seed guiding device is located above the seed metering wheel (4) and is used to guide the seeds into the shaped hole (5); The seed cleaning mechanism includes seed cleaning blades (7) that engage with the orifice (5) area of ​​the seed metering wheel (4).

2. The tiger nut seed metering device with two rows of seed holes as described in claim 1, characterized in that, The seeding wheel (4) is composed of a left half wheel (41) and a right half wheel (42) assembled together, and the shaped hole (5) is composed of half shaped holes respectively set on the left half wheel (41) and the right half wheel (42).

3. The tiger nut seed metering device with two rows of seed holes as described in claim 2, characterized in that, The end of the seed cleaning blade (7) extends into the joint gap between the left half wheel (41) and the right half wheel (42) and is located on one side of the seeding area (6).

4. A two-row, single-hole, wheel-type seed metering device for tiger nuts according to claim 2 or 3, characterized in that, The left half wheel (41) and the right half wheel (42) each have a non-circular connecting hole at their center, which is used to cooperate with the non-circular output shaft (8) of the drive system to transmit torque.

5. A two-row, single-insertion, wheel-type seed metering device for tiger nuts according to claim 4, characterized in that, The non-circular connecting hole and the cross section of the output shaft (8) are polygonal or spline-shaped.

6. The tiger nut seed metering device with two rows of seed holes as described in claim 1, characterized in that, The inlet of the hole (5) is provided with a seed guide chamfer (9), and the inclination angle of the seed guide chamfer (9) is 40°-50°.

7. The tiger nut seed metering device with two rows of seed holes as described in claim 1, characterized in that, The hole (5) is provided in four sets.

8. The tiger nut seed metering device with two rows of seed holes as described in claim 1, characterized in that, The seed guiding device includes a seed guide plate (12), a baffle (11), and a brush (10); the seed guide plate (12) is fixed inside the box (1), with its upper end receiving the seed inlet (2) and its lower end extending to the surface near the seed metering wheel (4); the baffle (11) is located outside the outlet of the seed guide plate (12), and the brush (10) is located inside the baffle (11), with its bristles maintaining slight contact with the surface of the seed metering wheel (4).

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