A selective sieve structure that combines scale-like sieves of different heights

Abstract

The present invention relates to a screening sieve structure combining sieves of different heights, and relates to the technical field of screening sieves. The screening sieve structure includes a short sieve section, a long sieve section, a sieve box, a crankshaft, a fixed base, a pull plate and an angle adjustment unit. The crankshaft is hinged to both side walls of the sieve box. The short sieve section and the long sieve section are welded to the crankshaft with a gap between them. The bottom end of the crankshaft is hinged to the pull plate through the fixed base. Both ends of the angle adjustment unit are connected to the pull plate and the sieve box respectively, and are used to adjust the angles of the short sieve section and the long sieve section.

Description

[Technical Field]

[0001] The present invention relates to the technical field of screening sieves, and more particularly to a screening sieve structure that combines scale-like sieves of different heights. [Background technology]

[0002] A scale-type screening screen is an important operating component of a grain harvester. However, as the harvesting capacity of a harvester increases, the thickness of the grains passing through the screening screen tends to increase. In addition, conventional scale-type screens of equal height have a flat sieve surface, which shortens the distance that grains move across the sieve surface, reducing the probability that the grains will pass through the sieve surface. In serious cases, the sieve holes may be clogged with the sieve material, ultimately resulting in increased screening losses. Therefore, to meet the requirements for high-efficiency and low-loss screening in a harvester with a large harvesting capacity, a technical challenge that must be addressed urgently is how to provide a combination structure of scale-type screens of different heights that can improve the degree of loosening of the sieved material, extend the path of movement of the sieved material, and increase the probability that the grains will pass through the sieve surface. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE INVENTION The main object of the present invention is to provide a screening structure that combines scale-like screens of different heights in order to solve the above problems. [Means for solving the problem]

[0004] To achieve the above object, the present invention provides a screening structure combining sieves of different heights. The screening structure includes a short sieve section, a long sieve section, a sieve box, a crankshaft, a fixed base, a pull plate, and an angle adjustment unit. The crankshaft is hingedly connected to both side walls of the sieve box. The short sieve section and the long sieve section are welded to the crankshaft at intervals. The bottom end of the crankshaft is hingedly connected to the pull plate via the fixed base. Both ends of the angle adjustment unit are connected to the pull plate and the sieve box, respectively, and are used to adjust the angles of the short sieve section and the long sieve section.

[0005] The angle adjustment unit further includes a sieve section angle adjustment pull rod, a fastening nut, an adjustment nut, and an adjustment base. The adjustment base is fixedly connected to an end of the sieve box. One end of the sieve section angle adjustment pull rod is connected to the pull plate via a fastening nut, and the other end is connected to the adjustment base via an adjustment nut.

[0006] Furthermore, both the short scale sieve portion and the long scale sieve portion have a tooth distribution structure, and the ratio of the height h1 of the top of the long scale sieve portion to the height h3 of the top of the short scale sieve portion is 1 / 3 to 1 / 2.

[0007] The crankshaft further includes a medium sieve portion welded to the crankshaft and positioned between the short sieve portion and the long sieve portion.

[0008] Furthermore, the short sieve portion, the medium sieve portion, and the long sieve portion all have a tooth distribution structure, and the ratio of the height h1 of the top of the long sieve portion to the height h2 of the top of the medium sieve portion and the height h3 of the top of the short sieve portion is h1:h2:h3=3:2:1.

[0009] Furthermore, the crankshaft is hingedly connected to both side walls of the sieve box, and all the shaft holes on the sieve box where the crankshaft is mounted are located on the same plane, and the distance between adjacent shaft holes is equal. [Effects of the Invention]

[0010] The beneficial effects of the present invention are as follows:

[0011] In the present invention, by adopting scaly sieve sections with different heights, the height difference during the descent of the sieved material is increased, improving the degree of loosening of the sieved material and increasing the probability that the grains will pass through the straw or sieve surface. Furthermore, because the sieve surface has a scaly sieve section structure with different heights, the movement trajectory of the sieved material is extended, also increasing the probability that the grains will pass through the sieve surface. Taking the above characteristics into consideration, the system's processing capacity for the screening load when the harvesting capacity is large is improved, and screening losses during the harvester's operation are reduced, thereby improving the harvest quality of the grain. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic structural diagram of a first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic structural diagram of Example 2 of the present invention. [Figure 3] FIG. 3 is a schematic structural diagram of a third embodiment of the present invention. [Figure 4] FIG. 4 is a schematic structural diagram of the long scale sieve part in the present invention. [Figure 5] FIG. 5 is a schematic structural diagram of the mesquamate sieve portion in the present invention. [Figure 6] FIG. 6 is a schematic structural diagram of the short scale sieve part in the present invention. [Figure 7] FIG. 7 is a schematic structural diagram of a crankshaft according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] In order to achieve the above objects and effects, the technical means and structure adopted in the present invention will be described in detail with reference to the drawings in connection with the preferred embodiments of the present invention, and the features and functions thereof will be described in detail. [Example]

[0014] As shown in Figures 1, 4, 6, and 7, the present invention provides a screening sieve structure that combines sieves of different heights, including a short sieve section 1, a long sieve section 2, a sieve box 3, a crankshaft 4, a fixed base 5, a pull plate 6, and an angle adjustment unit. The crankshaft 4 is hingedly connected to both side walls of the sieve box 3. The short sieve section 1 and the long sieve section 2 are welded to the crankshaft 4 with a gap between them. The bottom end of the crankshaft 4 is hingedly connected to the pull plate 6 via the fixed base 5, maximizing the path of movement of sieved material on the sieve surface. Both ends of the angle adjustment unit are connected to the pull plate 6 and the sieve box 3, respectively, and are used to adjust the angle of the short sieve section 1 and the long sieve section 2. The crankshaft 4 is hingedly connected to both side walls of the sieve box 3. All shaft holes on the sieve box 3 to which the crankshaft 4 is attached are located on the same plane, and the distance between adjacent shaft holes is equal. The lower part of the crankshaft 4 is connected to a fixed base 5 via a fixed shaft, and the distance between the shafts of all the fixed shafts is equal to the distance between the shaft holes on the sieve box 3. All the fixed shafts and the fixed base 5 are hingedly connected.

[0015] The operating principle of this embodiment is as follows.

[0016] The crankshaft, sieve box sidewall, and pull plate form a parallel four-bar linkage mechanism. This ensures that the planes of all sieve sections are parallel during the adjustment process (when the pull plate is pulled), and that the openings between all sieve sections are equal, thereby ensuring the quality of the grain screening (reducing the content of impurities). The sieve sections use short and long scale sections, arranged alternately to vary the height difference as the grain falls onto the sieve surface. Combining scale sections of different heights to form a wavy sieve surface improves the degree of loosening of the sieved material and extends the movement trajectory of the sieved material on the sieve surface. This increases the probability that the grain will be de-grained and pass through the sieve surface, improving screening efficiency and quality.

[0017] In this embodiment, the angle adjusting unit includes a sieve portion angle adjusting pull rod 7, a fastening nut 8, an adjusting nut 9, and an adjusting base 10. The adjusting base 10 is fixedly connected to an end of the sieve box 3. One end of the sieve portion angle adjusting pull rod 7 is connected to the pull plate 6 via the fastening nut 8, and the other end is connected to the adjusting base 10 via the adjusting nut 9.

[0018] Both the short scale sieve portion 1 and the long scale sieve portion 2 have a tooth distribution structure. The ratio of the height h1 of the top of the long scale sieve portion 2 to the height h3 of the top of the short scale sieve portion 1 is 1 / 3 to 1 / 2.

[0019] The height ratio of h1:h3 = 1 / 3 to 1 / 2 is mainly to increase the drop between the long and short scale-like sieve sections (ensuring the degree of loosening of the sieved material) and to maximize the length of the waves formed on the sieve surface. This extends the contact time between the sieved material and the sieve surface, increasing the probability that the grains will pass through the sieve surface and improving the efficiency of screening. [Example]

[0020] As shown in Figures 2, 4, 5, 6, and 7, the difference between this embodiment and Example 1 is as follows: This embodiment further includes a medium sieve section 11. The medium sieve section 11 is welded to the crankshaft 4 and is located between the short sieve section 1 and the long sieve section 2. The long sieve section 2, the medium sieve section 11, and the short sieve section 1 are arranged in order from one side of the sieve box 3 to the other.

[0021] The short sieve portion 1, the medium sieve portion 11, and the long sieve portion 2 all have a tooth distribution structure. The ratio of the height h1 of the top of the long sieve portion 2, the height h2 of the top of the medium sieve portion 11, and the height h3 of the top of the short sieve portion 1 is h1:h2:h3=3:2:1.

[0022] This ratio is mainly based on the above and increases the height difference between the adjacent long-scale sieve section and short-scale sieve section to strengthen the reflux of the sieve residue, thereby further extending the screening time of the sieve residue and reducing screening losses. [Example]

[0023] As shown in Figures 3, 4, 5, 6, and 7, the difference between this embodiment and Example 1 is as follows: This embodiment further includes a medium sieve section 11. The medium sieve section 11 is welded to the crankshaft 4 and is located between the short sieve section 1 and the long sieve section 2. The long sieve section 2, the short sieve section 1, and the medium sieve section 11 are arranged in order from one side of the sieve box 3 to the other.

[0024] The short sieve portion 1, the medium sieve portion 11, and the long sieve portion 2 all have a tooth distribution structure. The ratio of the height h1 of the top of the long sieve portion 2, the height h2 of the top of the medium sieve portion 11, and the height h3 of the top of the short sieve portion 1 is h1:h2:h3=3:2:1.

[0025] The purpose of this embodiment is to improve the working efficiency of the screening screen by reducing the drop and increasing the speed at which the screened material moves backward.

[0026] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention in any way. Therefore, any slight modifications or equivalent variations and modifications made to the above embodiments based on the technical essence of the present invention all belong to the scope of the technical solution of the present invention. [Explanation of symbols]

[0027] 1 Short scaly sieve part 2 Long scale-like sieve part 3 sieve box 4 crankshaft 5 Fixed base 6 Pull Plate 7 Sieve angle adjustment pull rod 8 Fastening nut 9 Adjustment Nut 10 Adjustment Base 11 Medium scaly sieve part

Claims

1. A selective sieve structure that combines scale-like sieves of different heights, Each of them has a tooth distribution structure, and includes a short scale sieve section and a long scale sieve section, each with different upper tooth heights, a sieve box, a crankshaft, a fixed base, a pull plate and an angle adjustment unit. The crankshaft is hingedly connected to both side walls of the sieve box; the short scale sieve portion and the long scale sieve portion are welded to the crankshaft at intervals; a bottom end of the crankshaft hingedly connected to the pull plate via the fixed base; The two ends of the angle adjusting unit are connected to the pull plate and the sieve box, respectively, and are used to adjust the angles of the short scale sieve section and the long scale sieve section. A selective sieve structure characterized by the above.

2. The angle adjustment unit includes a sieve part angle adjustment pull rod, a fastening nut, an adjustment nut and an adjustment base; the adjusting base is fixedly connected to an end of the sieve box; The sieve part angle adjustment pull rod has one end connected to the pull plate via a fastening nut and the other end connected to the adjustment base via an adjustment nut.

2. A screening sieve structure comprising a combination of scale-like sieves of different heights according to claim 1.

3. A screening structure combining scale-like sieves of different heights as described in claim 1 or 2, characterized in that the ratio of the height h1 of the upper teeth of the long scale-like sieve portion to the height h3 of the upper teeth of the short scale-like sieve portion is 1 / 3 to 1 / 2.

4. 3. A screening structure combining scale-like sieves of different heights according to claim 1 or 2, further comprising a medium scale-like sieve portion, the medium scale-like sieve portion being welded to the crankshaft and positioned between the short scale-like sieve portion and the long scale-like sieve portion.

5. The short scale sieve portion, the medium scale sieve portion, and the long scale sieve portion all have a tooth-shaped distribution structure, The ratio of the height h1 of the upper teeth of the long sieve portion, the height h2 of the upper teeth of the medium sieve portion, and the height h3 of the upper teeth of the short sieve portion is h1:h2:h3=3:2:

1.

5. A screening sieve structure comprising a combination of scale-like sieves of different heights according to claim 4.

6. The crankshaft is hingedly connected to both side walls of the sieve box; All the shaft holes on the sieve box to which the crankshaft is attached are located on the same plane, and the distance between adjacent shaft holes is equal.

2. A screening sieve structure comprising a combination of scale-like sieves of different heights according to claim 1.

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