CN-224205705-U - Pneumatic corn precise seed sowing device

Abstract

The utility model discloses an air-fed type corn precise seeding apparatus, which relates to the field of seeding equipment and is characterized by comprising a rear shell, a bearing, a seeding disk, a hole insert, a transmission shaft, a positioning screw, a centrifugal reducing seed protection plate and a front shell component, wherein the bearing is arranged in a bearing groove of the rear shell, the seeding disk is positioned in a seeding disk mounting groove of the rear shell, the transmission shaft is connected with the seeding disk through the positioning screw, the hole insert is arranged in a straight hole groove, the reducing centrifugal seed protection plate is arranged at the outer side of the seeding disk to prevent the hole insert from being thrown out, and the front shell is connected with the rear shell through the positioning hole. The corn seed precision sowing device is simple and reliable in structure, dynamic reducing is applied to the seed filling section to optimize the filling posture of corn seeds, and inclined hole inserts are used for enhancing seed carrying stability and seed cleaning efficiency, so that the precision sowing quality of single seeds is improved.

Inventors

• ZHANG JUNCHANG
• ZHANG ZIJUAN
• GAO XIAOJUN
• CHENG HONGYE
• ZHANG XIRUI
• LI XINYU
• CHEN HUIGE
• Yuan Quanjie

Assignees

• 西北农林科技大学

Dates

Publication Date

20260508

Application Date

20250405

Claims (6)

1. 1. The seed pneumatic feeding type precise corn seed metering device is characterized by comprising a rear shell (1), a bearing (2), a seed metering disc (3), a hole plug-in (4), a transmission shaft (5), a positioning screw (6), a centrifugal variable diameter seed protection plate (7) and a front shell (8), wherein the bearing (2) is arranged in a bearing groove (1-7) of the rear shell (1), the seed metering disc (3) is positioned in a seed metering disc mounting groove (1-2) of the rear shell (1), the hole plug-in (4) is arranged in the straight hole groove (3-2), the transmission shaft (5) is connected with the seed metering disc (3) through the positioning screw (6), the variable diameter centrifugal seed protection plate (7) is arranged on the outer side of the seed metering disc (3) to prevent the hole plug-in (4) from being thrown out, and the front shell (8) is connected with the rear shell (1) through the positioning hole (8-7).
2. 2. The pneumatic corn precise seeding apparatus according to claim 1, wherein the seeding disk (3) is circumferentially provided with 5 straight hole slots (3-2) and ventilation holes (3-1), and a screw hole (3-3) and a shaft hole (3-4) are arranged in the center.
3. 3. The pneumatic corn precise seeding apparatus according to claim 1, wherein the hole-shaped plug-in unit (4) is provided with a T-shaped straight base (4-1) and a trapezoid inclined capturing lug (4-2), the T-shaped straight base (4-1) can be embedded into the straight hole groove (3-2), and an included angle between the trapezoid inclined capturing lug (4-2) and the T-shaped straight base (4-1) is 70 degrees.
4. 4. The pneumatic corn precise seed metering device of claim 1, wherein the seed protection plate is provided with a primary filling plate (7-4), a precise filling plate (7-5), a seed cleaning plate (7-6) and a seed discharging plate (7-7), the bottom outlines of the primary filling plate (7-4), the seed cleaning plate (7-6) and the seed discharging plate (7-7) are circular, an included angle phi=70 DEG of the primary filling plate (7-4), and a radius mutation (7-3) is arranged at the joint of the precise filling plate (7-5) and the primary filling plate (7-4).
5. 5. The pneumatic corn precise seed metering device of claim 1, wherein the front shell (8) is provided with a seed inlet pipeline (8-11), an annular pipeline (8-10), a return pipeline (8-1), an outlet cavity (8-6) and an isolation cavity (8-9), and an included angle between the return pipeline (8-1) and the seed inlet pipeline (8-11) is 40 degrees.
6. 6. The pneumatic corn precise seeding apparatus according to claim 5, wherein the seed inlet pipeline (8-11) is provided with an inlet elbow pipe (8-2), a contraction section (8-3), a throat part (8-4) and a diffusion section (8-5), the inner diameter of the inlet elbow pipe (8-2) is 20mm, the inclination angle of the contraction section (8-3) is 40 degrees, and the inclination angle of the diffusion section (8-5) is 20 degrees.

Description

Pneumatic corn precise seed sowing device Technical Field The utility model discloses an air-fed corn precise seed sowing device, and relates to the field of sowing equipment. Background The current domestic corn production faces two major challenges, namely low yield per unit area and difficulty in meeting the increasing consumption demand, and high dependence on the international market, and under the background, the corn mechanized precision sowing technology becomes a key link for breaking through the yield bottleneck, and the sowing uniformity and reliability directly influence the emergence rate and the final yield. In recent years, with the development of agriculture in large scale, the demand for high-speed and high-precision sowing is remarkably increased, and mechanized precision sowing becomes a development trend of corn sowing. However, the existing pneumatic seed metering device is difficult to charge seeds, unstable in carrying seeds and easy to damage seeds in a seed cleaning link, so that the pneumatic precise corn seed metering device is developed. Disclosure of Invention The utility model aims to provide an air-fed precise corn seeding apparatus, which is used for improving the problems of difficult seed filling and unstable seed carrying of the pneumatic seeding apparatus, and reducing the miss-seeding index and the re-seeding index due to the fact that seed damage is easy to occur in a seed cleaning link. In order to achieve the purpose, the novel seed metering device comprises a rear shell 1, a bearing 2, a seed metering disc 3, a hole insert 4, a transmission shaft 5, a positioning screw 6, a centrifugal variable-diameter seed protection plate 7 and a front shell 8, wherein the bearing is arranged in a bearing groove of the rear shell, the seed metering disc is positioned in a seed metering disc groove of the rear shell, the transmission shaft is connected with the seed metering disc through the positioning screw, the hole insert is arranged in a straight hole groove, the seed protection plate is arranged on the outer side of the seed metering disc to prevent the hole insert from being thrown out, and the front shell is connected with the rear shell through a connecting plate. As a preferable technical scheme of the utility model, 5 straight hole grooves and airflow through holes are distributed in the circumferential direction of the seed metering disc, and a screw hole and a transmission shaft hole are formed in the center. As a preferable technical scheme of the utility model, the T-shaped straight base and the trapezoid inclined capturing lug are arranged on the hole insert, the T-shaped straight base can be embedded into the straight hole groove, and the included angle between the trapezoid inclined capturing lug and the T-shaped straight base is 70 degrees. As a preferable technical scheme of the utility model, the seed protection plate is provided with a primary filling plate, a fine filling plate, a seed cleaning plate and a seed discharging plate, the bottom outlines of the primary filling plate, the seed cleaning plate and the seed discharging plate are round, the clamping angle phi of the primary filling plate is=70 degrees, and the joint of the fine filling plate and the primary filling plate is provided with a radius mutation. As a preferable technical scheme of the utility model, the front shell is provided with a seed inlet pipeline, an annular pipeline, a backflow pipeline, an outlet cavity and an isolation cavity, and the included angle between the backflow pipeline and the seed inlet pipeline is 40 degrees. As a preferable technical scheme of the utility model, the seed inlet pipeline is provided with an inlet elbow pipe, a contraction section, a throat part and a diffusion section, wherein the inner diameter of the inlet elbow pipe is 20mm, the inclination angle of the contraction section is 40 degrees, and the inclination angle of the diffusion section is 20 degrees. Compared with the prior art, the utility model has the beneficial effects that: the pneumatic corn precise seed sowing device adopts air flow to uniformly supply seeds, thereby avoiding the missing and recharging caused by seed accumulation. The air-feeding type precise corn seed sowing device has the advantages that the included angle between the backflow pipeline and the seed feeding pipeline is smaller, and the speed and direction difference between backflow seeds and seed feeding seeds is reduced. The pneumatic corn precise seed metering device of the utility model utilizes the centrifugal reducing seed protection plate to adjust the gesture of the seeds in the hole plug-in, thereby effectively improving the gesture of the seeds. Drawings FIG. 1 is an exploded view of the air-fed precision corn seed metering device of the present utility model; FIG. 2 is a front view of the air-fed precision corn seed metering device of the present utility model; FIG. 3 is a left side elevational view in full sectio