Multilayer grain sieve stepless variable speed double air duct cleaning fan and screening assembly

Abstract

This utility model relates to a continuously variable speed dual-channel cleaning blower and screening assembly for multi-layer grain sieves. The continuously variable speed dual-channel cleaning blower for multi-layer grain sieves includes a blower body with two air outlets facing the same side of the blower body. Both air outlets are elongated openings extending left and right. At least one set of air regulating plate assemblies is installed at each air outlet. The air regulating plate assembly includes an electric push cylinder, a linkage rod, and multiple parallel and spaced air regulating plates. The electric push cylinder is fixed to the blower body, and its output shaft is coaxially and fixedly connected to one end of the linkage rod. The linkage rod extends movably into the air outlet along its length. One end of each of the multiple air regulating plates is movably connected to the linkage rod. The middle of each multiple air regulating plate is hinged to the inner wall of the air outlet of the blower body via a hinge shaft. The other end of each multiple air regulating plate extends out of the air outlet. The hinge shaft is arranged perpendicular to the linkage rod and perpendicular to the air outlet direction.

Description

Technical Field

[0001] This utility model relates to the technical field of grain cleaning, specifically to a multi-layer grain screen with a continuously variable dual-channel cleaning fan and screening components. Background Technology

[0002] With the development of agricultural mechanization in China, agricultural machinery development technology has become increasingly mature. Existing combine harvesters on the market suffer from the problem of incomplete separation of kernels (such as corn kernels) from impurities, resulting in their discharge from the machine (especially noticeable in sloping fields). This is mainly due to the harvester's low cleaning efficiency, high impurity content in the kernels (due to issues with cleaning fan configuration), and significant kernel loss.

[0003] Existing combine harvesters typically have only one cleaning fan with a single air duct outlet. This makes it difficult to achieve initial separation of grains from impurities in multi-layered grain sieves, especially when there are many impurities. Incomplete sieving by the cleaning sieve can easily lead to clogging, preventing the cleaning process from completing and causing grains to be discharged from the machine, resulting in significant grain loss. Furthermore, existing cleaning fans cannot adjust the airflow direction, leading to low cleaning efficiency when operating on sloping terrain where grains and impurities tend to concentrate on one side of the cleaning sieve. Utility Model Content

[0004] In order to solve one or more technical problems existing in the prior art, this utility model provides a continuously variable dual-channel cleaning fan and screening components for multi-layer grain screening.

[0005] The technical solution of this utility model to solve the above technical problems is as follows: This utility model provides a stepless speed-changing dual-channel cleaning blower for multi-layer grain sieve, including a blower body, the blower body having two air outlets, both air outlets facing the same side of the blower body, both air outlets being elongated openings extending left and right, and at least one set of air regulating plate assembly installed at each air outlet. The air regulating plate assembly includes an electric actuator, a linkage rod, and multiple parallel and spaced air regulating plates. The electric actuator is fixed to the fan body, and its output shaft is coaxially and fixedly connected to one end of the linkage rod. The linkage rod extends movably into the air outlet along its length. One end of each of the multiple air regulating plates is movably connected to the linkage rod. The middle of each of the multiple air regulating plates is hinged to the inner sidewall of the air outlet of the fan body via a hinge shaft. The other end of each of the multiple air regulating plates extends out of the air outlet. The hinge shaft is arranged perpendicular to the linkage rod and also perpendicular to the air outlet direction.

[0006] The beneficial effects of this utility model are as follows: This utility model provides a continuously variable speed dual-duct cleaning blower for multi-layer grain sieves. By setting the blower body with two air outlets, it can effectively clean each layer of the multi-layer grain sieve structure, resulting in high screening efficiency. By installing an air regulating plate at the blower inlet of the blower body, the air direction can be adjusted to the left or right side of the cleaning sieve when operating on sloping terrain, maximizing the cleaning of grains and impurities. The air direction is adjusted by using an electric actuator to control the linkage rod to drive the air regulating plate, greatly reducing the need for manual adjustment and providing convenience and speed.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, multiple first snap-fit ​​grooves and multiple second snap-fit ​​grooves are respectively provided on the upper and lower side walls of the air outlet of the fan body. The openings of the first snap-fit ​​grooves and the openings of the second snap-fit ​​grooves are both arranged facing the air outlet direction. The multiple first snap-fit ​​grooves and the multiple second snap-fit ​​grooves are arranged in a one-to-one correspondence. The upper and lower ends of the multiple hinge shafts are detachably and rotatably connected in the correspondingly arranged first snap-fit ​​grooves and second snap-fit ​​grooves.

[0009] The advantages of adopting the above-mentioned further solution are: by opening snap-fit ​​grooves on the upper and lower side walls of the air outlet of the fan body, it is convenient to stably assemble multiple hinge shafts and also to facilitate the assembly and disassembly of the entire air regulating plate assembly. When installing the air regulating plate assembly, simply snap the hinge shafts of the entire air regulating plate assembly into the corresponding snap-fit ​​grooves; when disassembling the air regulating plate assembly, simply remove the hinge shafts of the entire air regulating plate assembly from the corresponding snap-fit ​​grooves.

[0010] Furthermore, the upper and lower side walls of the air outlet of the fan body are respectively detachably equipped with a first fixing plate and a second fixing plate. The first fixing plate has a plurality of first fixing holes, and the second fixing plate has a plurality of second fixing holes. The plurality of first fixing holes and the plurality of second fixing holes are arranged in a one-to-one correspondence with each other. The plurality of first fixing holes are arranged in a one-to-one correspondence with the plurality of first snap-fit ​​grooves, and the plurality of second fixing holes are arranged in a one-to-one correspondence with the plurality of second snap-fit ​​grooves. The upper and lower ends of the plurality of hinge shafts respectively move through the corresponding first fixing holes and second fixing holes. The upper and lower ends of the hinge shafts are axially positioned by snap rings.

[0011] The advantages of adopting the above-mentioned further solution are: by setting the first and second fixing plates, the hinge shaft can be further positioned, preventing it from moving up and down or back and forth. Even with the addition of fixing plates, disassembly is very convenient; simply remove the retaining spring and then remove the first and second fixing plates.

[0012] Furthermore, both the first fixing plate and the second fixing plate are long strip-shaped structures that extend along the length of the air outlet.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the long strip-shaped structure fits the shape of the air outlet better.

[0014] Furthermore, the first fixing plate is detachably installed on the outer surface of the upper side wall of the air outlet of the fan body, and the second fixing plate is detachably installed on the outer surface of the lower side wall of the air outlet of the fan body.

[0015] Furthermore, the left side wall and / or right side wall of the fan body are provided with elongated sliding holes that extend forward and backward, and the linkage rod moves through the corresponding elongated sliding holes and can move back and forth within the elongated sliding holes.

[0016] The beneficial effect of adopting the above-mentioned further solution is that, since the linkage rod may undergo slight deformation when it drives multiple air regulating plates to rotate, the setting of the long sliding hole can provide guidance and deformation space for the slight forward and backward movement of the linkage rod.

[0017] Furthermore, each air outlet of the fan body is equipped with two sets of the air regulating plate assemblies, and the two sets of air regulating plate assemblies are arranged symmetrically in mirror image along the length of the air outlet.

[0018] The beneficial effect of adopting the above-mentioned further solution is that, since the air outlet of the fan body is relatively long, the use of two sets of mirror-symmetrically arranged air regulating plate assemblies can make the air regulating process stable and reliable.

[0019] Furthermore, the linkage rods of the two sets of air regulating plate assemblies at the air outlet are arranged coaxially at intervals.

[0020] Furthermore, the distance between one end of the air regulating plate and the hinge shaft is less than the distance between the other end of the air regulating plate and the hinge shaft.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the linkage rod can drive the air regulating plate to rotate with a smaller force, and the rotation process is more stable and reliable.

[0022] This utility model also provides a screening component, including at least one continuously variable dual-channel cleaning fan for multi-layer grain sieve as described above, and a multi-layer grain sieve body. The multi-layer grain sieve body has multiple sorting intervals arranged vertically. The two air outlets of the fan body are respectively arranged corresponding to two adjacent sorting intervals.

[0023] The beneficial effects of this utility model are as follows: The screening component of this utility model, by setting a fan body with two air outlets, can effectively clean each layer of the multi-layer grain sieve structure, resulting in high screening efficiency. By setting an air regulating plate at the fan outlet of the fan body, when operating on sloping plots, the air direction can be adjusted to the left or right side of the cleaning sieve, thereby maximizing the cleaning of grains and impurities. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure at the outlet of the continuously variable dual-channel cleaning blower for the multi-layer grain sieve of this utility model. Figure 1 ; Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 This is a schematic diagram of the structure at the outlet of the continuously variable dual-channel cleaning blower for the multi-layer grain sieve of this utility model. Figure 2 ; Figure 4 This is a schematic diagram of the hinge shaft mounting structure of this utility model. Figure 1 ; Figure 5 Schematic diagram of the hinge shaft mounting structure of this utility model Figure 2 ; Figure 6 This is a schematic diagram of the screening component structure of this utility model; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of AA.

[0025] The attached diagram lists the components represented by each number as follows: 1. Fan body; 11. Air outlet; 12. Upper side wall; 13. Lower side wall; 14. Left side wall; 15. Right side wall; 16. Long sliding hole; 2. Electric push cylinder; 21. Linkage rod; 22. Air regulating plate; 23. Hinge shaft; 24. First locking groove; 25. First fixing plate; 26. Second fixing plate; 27. Snap ring; 3. Multi-layer grain sieve body; 31. Sorting interval. Detailed Implementation

[0026] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] Example 1 like Figures 1-7As shown in the figure, a multi-layer grain sieve continuously variable dual-channel cleaning blower includes a blower body 1. The blower body 1 has two air outlets 11. Both air outlets 11 face the same side of the blower body 1. Both air outlets 11 are elongated openings that extend left and right. At least one set of air regulating plate assembly is installed at each air outlet 11. The air regulating plate assembly includes an electric actuator 2, a linkage rod 21, and multiple parallel and spaced air regulating plates 22. The electric actuator 2 is fixed to the fan body 1. The output shaft of the electric actuator 2 is coaxially and fixedly connected to one end of the linkage rod 21. The linkage rod 21 extends movably into the air outlet 11 along its length. One end of each of the multiple air regulating plates 22 is movably connected to the linkage rod 21. The middle portion of each of the multiple air regulating plates 22 is hinged to the inner wall of the air outlet 11 of the fan body 1 via a hinge shaft 23. The other end of each of the multiple air regulating plates 22 extends out of the air outlet 11. The hinge shaft 23 is arranged perpendicular to the linkage rod 21 and also perpendicular to the air outlet direction of the air outlet 11. The electric actuator can drive the multiple air regulating plates to deflect around their respective hinge shafts via the linkage rod to adjust the airflow direction.

[0028] Preferred, such as Figure 5 As shown, the left side wall 14 and / or right side wall 15 of the fan body 1 are provided with elongated sliding holes 16 extending forward and backward. The linkage rod 21 moves through the corresponding elongated sliding hole 16 and can move back and forth within the elongated sliding hole 16. Since the linkage rod may undergo slight deformation when driving multiple air regulating plates to rotate, the elongated sliding hole provides guidance and deformation space for the slight forward and backward movement of the linkage rod.

[0029] This embodiment presents a continuously variable speed dual-duct cleaning blower for a multi-layer grain sieve. By featuring a blower body with two air outlets, it effectively cleans each layer of the multi-layer grain sieve structure, resulting in high screening efficiency. An air regulating plate is installed at the blower inlet to adjust the airflow direction when working on sloping terrain, where grains and impurities tend to be biased to the left or right side of the sieve, maximizing the cleaning of grains and impurities. The airflow direction is adjusted by using an electric actuator to control a linkage rod that drives the air regulating plate, significantly reducing the need for manual adjustment and providing convenience and speed.

[0030] Example 2 Based on Embodiment 1, this embodiment provides a preferred assembly scheme for the hinge shaft 23, such as... Figure 4As shown, the upper sidewall 12 and lower sidewall 13 of the air outlet 11 of the fan body 1 are respectively provided with multiple first snap-fit ​​grooves 24 and multiple second snap-fit ​​grooves. The openings of the first snap-fit ​​grooves 24 and the second snap-fit ​​grooves are both arranged facing the air outlet 11. The multiple first snap-fit ​​grooves 24 and the multiple second snap-fit ​​grooves are arranged in a one-to-one correspondence. The upper and lower ends of the multiple hinge shafts 23 are detachably and rotatably connected to the corresponding first snap-fit ​​grooves 24 and second snap-fit ​​grooves. By providing snap-fit ​​grooves on the upper and lower sidewalls of the air outlet of the fan body, the stable assembly of multiple hinge shafts is facilitated, and the assembly and disassembly of the entire air regulating plate assembly are also facilitated. When installing the air regulating plate assembly, the hinge shafts of the entire air regulating plate assembly are simply snapped into the corresponding snap-fit ​​grooves. When disassembling the air regulating plate assembly, the hinge shafts of the entire air regulating plate assembly are simply removed from the corresponding snap-fit ​​grooves.

[0031] Example 3 Based on Embodiment 2, this embodiment provides a preferred positioning scheme for the hinge shaft 23, such as... Figures 1-2 , Figure 4 and Figure 5 As shown, the upper and lower side walls of the air outlet 11 of the fan body 1 are detachably equipped with a first fixing plate 25 and a second fixing plate 26, respectively. The first fixing plate 25 has multiple first fixing holes, and the second fixing plate 26 has multiple second fixing holes. The multiple first fixing holes and multiple second fixing holes are arranged in a one-to-one correspondence, with each of the first fixing holes corresponding to a multiple of the first snap-fit ​​grooves 24, and each of the second fixing holes corresponding to a multiple of the second snap-fit ​​grooves. The upper and lower ends of the multiple hinge shafts 23 respectively move through the corresponding first and second fixing holes. Both ends of the hinge shafts 23 are axially positioned by snap rings 27. By setting the first and second fixing plates, the hinge shafts can be further positioned, preventing vertical and horizontal movement. Even with the added fixing plates, disassembly is convenient; simply remove the snap rings and then remove the first and second fixing plates.

[0032] Preferably, in this embodiment, both the first fixing plate 25 and the second fixing plate 26 are elongated plate-shaped structures extending along the length of the air outlet. The elongated plate-shaped structure better conforms to the shape of the air outlet.

[0033] Specifically, such as Figures 1-2 , Figure 4 and Figure 5 As shown, the first fixing plate 25 is detachably installed on the outer surface of the upper side wall 12 of the air outlet 11 of the fan body 1, and the second fixing plate 26 is detachably installed on the outer surface of the lower side wall 13 of the air outlet 11 of the fan body 1.

[0034] Example 4 Based on any of the above embodiments, in this embodiment, two sets of the aforementioned air regulating plate assemblies are installed at each air outlet 11 of the fan body 1. The two sets of air regulating plate assemblies are arranged in a mirror-symmetrical manner along the length of their respective air outlet 11. Since the air outlet of the fan body is relatively long, the use of two sets of mirror-symmetrically arranged air regulating plate assemblies ensures a stable and reliable air regulating process.

[0035] Preferred, such as Figure 1 and Figure 3 As shown, the linkage rods 21 of the two sets of air regulating plate assemblies at the air outlet 11 are arranged coaxially at intervals.

[0036] like Figure 3 As shown, preferably, the distance between one end of the air regulating plate 22 and the hinge shaft 23 is smaller than the distance between the other end of the air regulating plate 22 and the hinge shaft 23. This allows the linkage rod to drive the air regulating plate to rotate with a smaller force, making the rotation process more stable and reliable.

[0037] Example 5 This embodiment provides a screening component, including at least one continuously variable dual-channel cleaning fan for multi-layer grain sieve as described in any of the above embodiments, and also includes a multi-layer grain sieve body 3. The multi-layer grain sieve body 3 has a plurality of sorting intervals 31 arranged vertically. The two air outlets 11 of the fan body 1 are respectively arranged corresponding to two adjacent sorting intervals 31.

[0038] The screening component in this embodiment, by setting up a fan body with two air outlets, can effectively clean each layer of the multi-layer grain sieve structure, resulting in high screening efficiency. By setting an air regulating plate at the fan outlet of the fan body, when operating on sloping plots, where grains and impurities tend to be biased to the left or right side of the cleaning sieve, the airflow direction can be adjusted to the left or right side, maximizing the cleaning of grains and impurities.

[0039] In the description of this utility model, it should be understood that the terms "length", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-layer grain sieve with stepless speed change double air duct cleaning fan, characterized in that, Includes a fan body, the fan body has two air outlets, both air outlets face the same side of the fan body, both air outlets are elongated openings extending left and right, and at least one set of air regulating plate assembly is installed at each air outlet. The air regulating plate assembly includes an electric actuator, a linkage rod, and multiple parallel and spaced air regulating plates. The electric actuator is fixed to the fan body, and its output shaft is coaxially and fixedly connected to one end of the linkage rod. The linkage rod extends movably into the air outlet along its length. One end of each of the multiple air regulating plates is movably connected to the linkage rod. The middle of each of the multiple air regulating plates is hinged to the inner sidewall of the air outlet of the fan body via a hinge shaft. The other end of each of the multiple air regulating plates extends out of the air outlet. The hinge shaft is arranged perpendicular to the linkage rod and also perpendicular to the air outlet direction.

2. The infinitely variable speed dual air duct cleaning fan for multi-layer seed grain screen according to claim 1, characterized in that, The upper and lower side walls of the air outlet of the fan body are respectively provided with a plurality of first snap-fit ​​grooves and a plurality of second snap-fit ​​grooves. The openings of the first snap-fit ​​grooves and the openings of the second snap-fit ​​grooves are both arranged facing the air outlet direction. The plurality of first snap-fit ​​grooves and the plurality of second snap-fit ​​grooves are arranged in a one-to-one correspondence. The upper and lower ends of the plurality of hinge shafts are respectively detachably and rotatably connected to the corresponding first snap-fit ​​grooves and second snap-fit ​​grooves.

3. The infinitely variable speed dual air duct cleaning fan for multi-layer seed grain screen according to claim 2, characterized in that, The upper and lower side walls of the air outlet of the fan body are respectively detachably equipped with a first fixing plate and a second fixing plate. The first fixing plate has a plurality of first fixing holes, and the second fixing plate has a plurality of second fixing holes. The plurality of first fixing holes and the plurality of second fixing holes are arranged in a one-to-one correspondence with each other. The plurality of first fixing holes are arranged in a one-to-one correspondence with the plurality of first snap-fit ​​grooves, and the plurality of second fixing holes are arranged in a one-to-one correspondence with the plurality of second snap-fit ​​grooves. The upper and lower ends of the plurality of hinge shafts move through the corresponding first fixing holes and second fixing holes, respectively. The upper and lower ends of the hinge shafts are axially positioned by snap rings.

4. The infinitely variable dual air duct cleaning fan for multi-layer seed grain screen according to claim 3, characterized in that, Both the first fixing plate and the second fixing plate are long strip-shaped structures that extend along the length of the air outlet.

5. The infinitely variable dual air duct cleaning fan for multi-layer seed grain screen according to claim 3, characterized in that, The first fixing plate is detachably installed on the outer surface of the upper side wall of the air outlet of the fan body, and the second fixing plate is detachably installed on the outer surface of the lower side wall of the air outlet of the fan body.

6. The infinitely variable dual air duct cleaning fan for multi-layer seed grain screen according to claim 1, characterized in that The left and / or right sides of the fan body are provided with elongated sliding holes that extend forward and backward. The linkage rod moves through the corresponding elongated sliding holes and can move back and forth within the elongated sliding holes.

7. The infinitely variable dual air duct cleaning fan for multi-layer seed grain screen according to claim 1, characterized in that, Two sets of the air regulating plate assemblies are installed at each air outlet of the fan body, and the two sets of air regulating plate assemblies are arranged symmetrically in mirror image along the length of the air outlet.

8. The infinitely variable dual air duct cleaning fan for multi-layer seed grain screen according to claim 7, characterized in that The linkage rods of the two sets of air regulating plate assemblies at the air outlet are arranged coaxially at intervals.

9. The infinitely variable dual air duct cleaning fan for multi-layer seed grain screen according to claim 1, characterized in that The distance between one end of the air regulating plate and the hinge shaft is less than the distance between the other end of the air regulating plate and the hinge shaft.

10. A screening assembly characterized by, The device includes at least one continuously variable dual-channel cleaning blower for multi-layer grain sieves as described in any one of claims 1 to 9, and also includes a multi-layer grain sieve body, wherein the multi-layer grain sieve body has a plurality of sorting intervals arranged sequentially in vertical order, and the two air outlets of the blower body are respectively arranged corresponding to two adjacent sorting intervals.

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