A single-disk type hill-drop planter performance test test-bed

Abstract

The utility model provides a single disc type hill drop planter performance test test bench, including mechanical frame, negative pressure fan, profiling adjusting device, single disc type hill drop planter and positive pressure air pump. Mechanical frame is the support main part, and the front end installation negative pressure fan provides adjustable seed taking negative pressure, and the middle part is suspended through the elastic profiling adjusting device hill drop planter and realizes the dynamic regulation of sowing depth, and the rear end is provided with positive pressure air pump and supplies the seed cleaning and seed throwing airflow. Test bench is equipped with digital pressure monitoring system, can real -time acquisition negative pressure seed taking and positive pressure seed throwing parameter, accurate simulation sowing process under different soil working condition, realizes sowing depth, air pressure and seed throwing track multi -parameter synchronous observation, has the characteristics such as flexible adjustment, data intuitionistic, provides efficient test platform for hill drop planter performance research.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery performance testing technology, specifically to a single-disc type seeder performance testing bench for laboratory use. Background Technology

[0002] In actual operation, single-disc seeders are easily affected by soil conditions, leading to inconsistent sowing depths and affecting sowing quality. Among existing seed metering test benches, the conveyor belt test bench is the most mature, but this type of test bench has disadvantages such as high equipment cost and large size, and is not suitable for testing single-disc seeders. Utility Model Content

[0003] This invention addresses the shortcomings of existing single-disc seeder test devices, such as insufficient adaptability and inconvenient adjustment, by providing a compact and flexible single-disc seeder performance testing platform. The platform includes a mechanical frame, a negative pressure fan, a contour adjustment device, a single-disc seeder, and a positive pressure pump. The mechanical frame utilizes a lightweight aluminum profile frame structure with a longitudinal axis along the test platform's forward direction. The front end of the frame features a traction hook and a front platform, the middle section has a central crossbeam, and the rear end has a rear platform. Eight directional wheels are symmetrically arranged along the longitudinal axis at the bottom for easy movement. The negative pressure fan is fixed to the front platform of the mechanical frame, providing adjustable seed-taking negative pressure for the seeder. The contour adjustment device consists of a telescopic rod, a spring, and a threaded buckle. The upper end of the telescopic rod is bolted to the central crossbeam of the mechanical frame, and the lower end connects to the single-disc seeder. The telescopic rod employs a two-stage nested structure; the inner wall of the outer rod has a guide groove, and the outer wall of the inner rod has corresponding guide protrusions, allowing the inner rod to perform linear telescopic movement relative to the outer rod. The lower section of the telescopic rod has an external thread that engages with the internal thread of the threaded clip. Precise axial length adjustment is achieved by rotating the threaded clip. Combined with a buffer spring, it adapts to different soil conditions and maintains a stable sowing depth. The outer edge of the threaded clip has anti-slip grooves, and its top has an annular limiting baffle to limit the maximum compression stroke of the spring. This device combines depth adjustment and shock absorption, effectively improving sowing accuracy. The single-disc type seeder is suspended in the middle of the machine frame via a contour adjustment device and connected to the positive pressure air pump pipeline. The positive pressure air pump is located on the rear platform of the machine frame. Both the negative pressure fan and the positive pressure air pump are equipped with air pressure regulating valves, allowing independent control of the negative and positive airflow pressures, thus providing adjustable airflow pressure for seed cleaning and sowing.

[0004] This invention employs a combination of negative and positive pressure systems to adjust air pressure parameters during seed collection, cleaning, and placement. It features modular design, contour depth adjustment, buffering and shock absorption, independent dual air pressure control, and a lightweight and compact structure. It can simulate various soil conditions and provide an experimental platform for testing and optimizing the performance of the seed planter. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0006] Figure 2 This is a schematic diagram of the contour adjustment device of this utility model;

[0007] In the diagram: 1-Mechanical frame, 2-Negative pressure fan, 3-Contour adjustment device, 4-Single disc seeder, 5-Positive pressure air pump, 6-Telescopic rod, 7-Spring, 8-Threaded buckle. Detailed Implementation

[0008] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0009] A central crossbeam is provided in the middle, and a rear platform is provided at the rear end of the mechanical frame (1). Eight directional wheels are symmetrically arranged along the longitudinal axis at the bottom to achieve movement and positioning. The negative pressure fan (2) is fixed to the front platform of the mechanical frame (1) and connected to the single disc seeder (4) through a flexible pipeline to provide adjustable seed negative pressure; the positive pressure air pump (5) is fixed to the rear platform of the mechanical frame (1) and delivers positive pressure airflow to the seeding area to assist the seeds in detaching and accurately placing them into the seed holes. During operation, the traction device drives the test platform forward, and the speed is controlled by the speed adjustment device to simulate different working conditions. The contour adjustment device (3) consists of a telescopic rod (6), a spring (7) and a threaded buckle (8). The upper end of the telescopic rod (6) is fixed to the central crossbeam of the mechanical frame (1) by bolts, and the lower end is connected to the single disc seeder (4). The telescopic rod (6) is a two-level nested structure. The inner wall of the outer rod is provided with a guide groove, and the outer wall of the inner rod is provided with a corresponding guide protrusion, so that the inner rod can make linear telescopic movements relative to the outer rod. A spring (7) is fitted onto the outside of the telescopic rod (6) to provide continuous downward pressure and cushion vibrations caused by ground undulations. The lower section of the telescopic rod (6) is provided with an external thread, and the threaded buckle (8) is provided with an internal thread that mates with the external thread. The two form a threaded engagement, and the extension length of the telescopic rod (6) can be precisely adjusted by rotating the threaded buckle (8), thereby controlling the soil penetration depth of the single disc seeder (4). The outer edge of the threaded buckle (8) is provided with anti-slip texture, and its top is provided with an annular limiting baffle to limit the maximum compression stroke of the spring (7). The single disc seeder (4) achieves self-rotation through ground friction, and its rotation speed is synchronized with its forward speed. Both the negative pressure fan (2) and the positive pressure air pump (5) are equipped with digital pressure gauges and air pressure regulating valves, which can independently control the air pressure of the negative and positive pressures respectively.

Claims

1. A performance testing bench for a single-disc seeder, comprising a mechanical frame (1), a negative pressure fan (2), a contour adjustment device (3), a single-disc seeder (4), and a positive pressure air pump (5), characterized in that: The mechanical frame (1) has a traction hook at the front end and eight directional wheels symmetrically arranged along the longitudinal axis at the bottom for moving the test platform; the negative pressure fan (2) is fixed to the front platform of the mechanical frame (1) and connected to the single disc seeder (4) through a pipeline to provide adjustable seed-taking negative pressure; the contour adjustment device (3) includes a telescopic rod (6), a spring (7) and a threaded buckle (8), wherein: the upper end of the telescopic rod (6) is fixed to the middle crossbeam of the mechanical frame (1) by bolts, and the lower end is connected to the single disc seeder (4); the spring (7) is sleeved with The telescopic rod (6) is used to dynamically buffer the soil reaction force. The lower section of the telescopic rod (6) is provided with an external thread, which cooperates with the internal thread of the threaded buckle (8). By rotating the threaded buckle (8), the axial length of the telescopic rod (6) is locked and the sowing depth is adjusted. The single disc type seeder (4) is suspended in the middle of the mechanical frame (1) through the contour adjustment device (3) and connected to the positive pressure air pump (5) pipeline. The positive pressure air pump (5) is fixed to the rear platform of the mechanical frame (1) to provide the single disc type seeder (4) with auxiliary airflow for seed cleaning and sowing.

2. The single-disc type seeder performance testing bench according to claim 1, characterized in that: The telescopic rod (6) has a two-level nested structure. The inner wall of the outer rod is provided with a guide groove, and the outer wall of the inner rod is provided with a corresponding guide protrusion to ensure the linearity of the telescopic movement.

3. The single-disc type seeder performance testing bench according to claim 1 or 2, characterized in that: The outer edge of the threaded buckle (8) is provided with anti-slip texture, and its top is provided with an annular limiting baffle to limit the maximum compression stroke of the spring (7).

4. The single-disc type seeder performance testing bench according to claim 1, characterized in that: Both the negative pressure fan (2) and the positive pressure air pump (5) are equipped with air pressure regulating valves, which can independently control the airflow pressure of negative pressure and positive pressure respectively.

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