Multifunctional adjustable concave grid

By designing a two-layer sieve structure, and using a fixed layer and a moving layer to adjust the size of the sieve holes, the problem of frequent grain crushing and replacement in traditional concave sieves is solved, achieving efficient and low-cost threshing operation.

CN224139626UActive Publication Date: 2026-04-21韩丹丹 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
韩丹丹
Filing Date
2025-03-10
Publication Date
2026-04-21

AI Technical Summary

Technical Problem

Traditional concave sieves cause severe grain breakage during threshing and require replacement of the sieve depending on the crop, resulting in low work efficiency and economic losses.

Method used

It adopts a two-layer sieve plate structure, with a fixed layer and a movable layer. The size of the sieve holes can be changed by adjusting the pull rod and the wire nut, so that it can adapt to different crop sizes without changing the concave sieve plate.

Benefits of technology

It achieves a threshing process that prevents grain breakage, saves time and labor, and is energy-efficient, reducing the cost and time loss of replacing concave sieves.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224139626U_ABST
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Abstract

The utility model relates to a multifunctional adjustable concave grid for harvesting, which comprises a fixed layer and a movable layer, a concave framework vertical beam and an arc-shaped cross beam framework are welded to form a #-shaped structure, an upper layer arc-shaped sieve plate and a lower layer arc-shaped sieve plate are arranged on a framework, sieve holes are arranged on the sieve plates in order, the holes are long holes, and the fixed layer and the movable layer are fixed by mounting fixed holes. The movable layer is fixedly connected to the arc-shaped sieve plate and is connected with the size-adjusting hole pull rod and the size-adjusting nut of the concave plate opening, so that adjustment is realized, movement and position change are realized, and the sieve pores are enlarged or reduced. The concave grid is simple in structure, reasonable in design, free of breakage during threshing, free of disassembly and suitable for various crops, eliminates inconvenience caused by the fact that a traditional concave grid needs to be replaced according to the requirement for the size of crop grains and economic losses caused by threshing and grain crushing, and really achieves the purposes of saving time, labor and energy and being efficient.
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Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery, and in particular relates to a multifunctional adjustable concave sieve for threshing. Background Technology

[0002] Currently, traditional concave sieves are mainly composed of transverse reinforcing ribs, longitudinal reinforcing ribs, and iron wires. Their threshing holes are formed by interlacing the longitudinal reinforcing ribs as vertical sides and the iron wires passing through the longitudinal reinforcing ribs as horizontal sides. Its main drawback is that grain breakage is relatively serious during operation, and different concave sieves need to be replaced according to the size of different crops, which reduces work efficiency and causes certain economic losses. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned technology. It adopts two layers of screen plates, (6)A fixed layer and (7)B moving layer, so there is no need to replace the concave screen. Because (7)B moving layer can move, the size of the holes can be changed, and the phenomenon of crushing and incomplete threshing can be reduced according to the different sizes of crops.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: the vertical beam of the concave plate skeleton is composed of arc-shaped horizontal beam skeletons welded to the upper and lower ends respectively. The frame is provided with two layers of arc-shaped sieve plates, namely (6)A fixed layer and (7)B moving layer. The sieve plates are provided with neatly arranged sieve holes, and the shape of the holes is elongated. They are fixed to the arc-shaped sieve plates through the installation fixing holes, and connected to the adjustment hole pull rod and the adjustment concave plate opening size screw nut to move and realize (7)B moving layer, change the position, and make its sieve holes larger or smaller.

[0005] The advantages of this utility model are:

[0006] With its simple structure, reasonable design, one-time investment, and low cost, it can be adjusted and moved according to the size of the crop grains during threshing without disassembly, ensuring that the grains are not broken. This eliminates the losses caused by the breakage and time-consuming and laborious replacement of traditional concave plate screens. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model.

[0008] Figure 2 yes Figure 1 A sectional view.

[0009] Figure 3 yes Figure 1 Parts diagram. Detailed Implementation

[0010] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0011] Depend on Figures 1-3 It can be seen that the present invention includes a concave plate frame vertical beam, and the upper and lower ends are respectively welded with arc-shaped crossbeam frames. The frame is provided with two layers of arc-shaped sieve plates, namely (6)A fixed layer and (7)B moving layer. The sieve plates are provided with neatly arranged sieve holes, and the holes are elongated. They are fixed to the arc-shaped sieve plates through the mounting fixing holes, and connected to the adjusting hole pull rod and the adjusting concave plate opening size screw nut to move, thereby realizing (7)B moving layer, changing its position, and making its sieve holes larger or smaller.

[0012] This invention welds a concave plate frame into a grid-shaped frame, and welds a fixed layer and a movable layer onto the frame, forming an arc-shaped sieve plate with upper and lower layers. Since the arc-shaped sieve plate and the sieve holes are an integral unit, and the movable layer can be moved and its position changed, the size of the holes can be adjusted according to the size of the crop grains during harvesting, thus eliminating the need for disassembly. During threshing, the grains are not broken, the threshing is clean, and it saves time, labor, and energy, making it energy-efficient.

Claims

1. A multi-functional adjustable concave screen comprising a fixed deck, a moving deck, characterized in that: On the concave plate frame vertical beam (5) and the arc-shaped cross beam frame (8), there are two layers of arc-shaped screen plates (1), namely a fixed layer and a movable layer. The screen plates are provided with neatly arranged screen holes (9). The holes are elongated holes. They are fixed to the arc-shaped screen plates (1) through the mounting fixing holes (4) and connected to the adjusting hole pull rod (2) and the adjusting concave plate opening size screw nut (3) to move the movable layer, change its position, and make its screen holes larger or smaller.

2. The multi-functional adjustable recessed screen panel of claim 1, wherein: It consists of two layers: a fixed layer and a movable layer.

3. The multi-functional adjustable recessed panel screen of claim 1, wherein: Adjustment and movement can be achieved by twisting the adjusting nut (3) to adjust the size of the concave opening and moving the layer.