A front sealing structure for a vibrating screen

Abstract

This invention provides a front sealing structure for a vibrating screen. A sealing element is fixedly installed between a front material plate (used to guide the grains downwards) below the threshing drum of a harvester and a fan housing below the front material plate. The width of the sealing element is not less than the screen surface width of the vibrating screen between the front material plate and the fan housing, and the two opposite sides of the sealing element in the width direction correspond to and are spaced apart from the left and right side walls of the frame, respectively. The sealing element blocks the opening of the vibrating screen formed by the upper front material plate, the lower fan housing, and the left and right side walls of the frame. The crop grains are blocked by the sealing element and fall along the fan housing back to the grain collection area below the vibrating screen, thus preventing the crop grains from flying out of the opening and falling to the ground, causing waste.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a front sealing structure for a vibrating screen. Background Technology

[0002] The threshing system of tracked combine harvesters can be divided into longitudinal axial flow threshing and cleaning systems and transverse axial flow threshing and cleaning systems. These two types of threshing and cleaning systems are the main structural forms currently used in the market.

[0003] Existing combine harvesters are generally divided into a threshing zone, a screening zone, and an air separation zone from top to bottom. In the screening zone, crop grains and straw and other impurities are separated and screened by the reciprocating vibration of the vibrating screen. The vibrating screen vibrates in an elliptical trajectory. Although the front corrugated plate inside the vibrating screen is inclined downward toward the tail end of the harvester to guide the movement of the crop, the horizontal vibration component of the vibrating screen will still cause the grains to fly out from the front end of the vibrating screen.

[0004] In the prior art, to solve the above-mentioned technical problems, a canvas is set at the front end of the vibrating screen for shielding. However, the vibrating screen is in a continuous working state. In order to adapt to the amplitude of the vibrating screen, the canvas needs to have sufficient stretching margin and cannot be fixed. Therefore, there will be gaps between the canvas and the vibrating screen, as well as between the canvas and the left and right side walls of the frame. Moreover, the gaps will expand from time to time during the vibration process, causing crop grains to leak out and fall from the front end of the frame to the ground, which cannot be collected and causes waste. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the existing harvester screening system is prone to grain leakage, resulting in waste.

[0006] Therefore, the present invention proposes a front sealing structure for a vibrating screen, comprising:

[0007] A sealing element is fixed between the front material plate and the fan housing located below the front material plate; the width of the sealing element is not less than the screen surface width of the vibrating screen between the front material plate and the fan housing;

[0008] The two opposite sides of the seal in the width direction are respectively fixed to the left and right side walls of the frame.

[0009] The gaps between the two sides of the seal and the left and right side walls of the frame are filled with sealant.

[0010] At least one observation port is provided on the seal; a transparent viewing element is installed on the observation port.

[0011] The viewing element is fastened to the observation port by a wing nut.

[0012] The visible component is an acrylic sheet or a glass sheet.

[0013] The sealing element is a sealing plate; one end of the sealing plate is flanged and fixed to the lower surface of the front material plate; the other end is fixed to the outer wall surface of the fan housing.

[0014] Also includes:

[0015] The first shielding member is disposed between the front material plate and the front plate of the vibrating screen; the first shielding member is a flexible member with an extension margin for the vibrating screen to reciprocate.

[0016] The width of the first shielding member is not less than the screen surface width of the vibrating screen.

[0017] Also includes:

[0018] The second shielding member has one end fixed to the end of the front material plate facing the vibrating screen, and the other end is a free end that hangs down naturally onto the screen surface of the vibrating screen.

[0019] Both the first and second shielding components are made of canvas.

[0020] The technical solution of this invention has the following advantages:

[0021] 1. The front sealing structure of the vibrating screen provided by this invention includes a sealing element fixedly installed between the front material plate (used to guide the grains downward) below the threshing drum of a harvester and the fan housing below the front material plate. The width of the sealing element is not less than the screen surface width of the vibrating screen between the front material plate and the fan housing, and the two opposite sides of the sealing element in the width direction correspond to and are spaced apart from the left and right side walls of the frame, respectively. The sealing element blocks the opening connecting the vibrating screen formed by the upper front material plate, the lower fan housing, and the left and right side walls of the frame. The crop grains, blocked by the sealing element, fall along the fan housing back to the grain collection area below the vibrating screen, preventing the crop grains from flying out of the opening and falling to the ground, thus avoiding waste. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the sealing plate installation structure in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the front sealing structure of the vibrating screen in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] H, Vibrating screen; 1, Frame; 1f, Sealing plate; 11f, Observation port; 2f, Front material plate; 3f, Fan housing; 4f, Visible component; 5f, Screen front plate; 6f, First shielding component; 7f, Second shielding component; 8f, Wing nut. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1

[0032] This embodiment provides a front sealing structure for a vibrating screen. A front material plate 2f is provided below the threshing drum to guide the crop grains down. One end of the front material plate 2f is fixed to the front frame 1, and the plate surface is inclined downward from the front end of the frame 1 to the rear end of the frame 1. The other end of the front material plate 2f is located above the vibrating screen H and within the orthographic projection of the vibrating screen H on the horizontal plane.

[0033] like Figure 1 As shown, the sealing element is fixed between the front material plate 2f and the fan housing 3f below the front material plate 2f. The width of the sealing element is not less than the screen surface width of the vibrating screen H between the front material plate 2f and the fan housing 3f, and the two opposite sides of the sealing element in the width direction are respectively fixed to the left and right side walls of the frame 1. In this embodiment, the sealing element is a sealing plate 1f, with a flange at the upper end. The flange is fixed to the lower surface of the front material plate 2f by bolts, and the lower end of the sealing plate 1f is fixed to the flange of the fan housing 3f by bolts. The gaps between the two sides of the sealing plate 1f and the left and right side walls of the frame 1 due to processing errors are filled and sealed with sealant.

[0034] In this embodiment, as Figure 1 or Figure 2 As shown, the sealing plate 1f is bent in one section, with a vertical section near the front material plate 2f and an inclined section near the fan housing 3f, forming a slope with the outer wall of the fan housing 3f to facilitate the guidance of crop grains leaking from the vibrating screen H. Figure 1 As shown, at least one observation port is provided in the vertical section of the sealing plate 1f. In this embodiment, two observation ports are provided, and a viewing element 4f is fixed to each observation port by a wing nut 8f for observing the accumulation of crops on the vibrating screen H. The viewing element 4f can be a transparent acrylic plate or a glass plate, preferably an acrylic plate, which is lightweight and not easily broken.

[0035] The opening of the vibrating screen H, which is formed by the upper front material plate 2f, the lower fan housing 3f, and the left and right side walls of the frame 1, is blocked by the sealing plate 1f. The crop grains fall back to the grain collection area below the vibrating screen H along the fan housing 3f due to the obstruction of the sealing plate 1f, so as to prevent the crop grains from flying out of the opening and falling to the ground, causing waste.

[0036] Furthermore, to prevent crop grains from accumulating between the fan casing 3f and the sealing plate 1f, such as... Figure 2 As shown, a first blocking member 6f is also provided. One end of the first blocking member 6f is fixed to the front material plate 2f above the vibrating screen H, and the other end of the first blocking member 6f is fixed to the frontmost screen plate 5f of the vibrating screen H. The first blocking member 6f is set at a certain angle to the screen surface of the vibrating screen H. The width of the first blocking member 6f is not less than the width of the screen surface of the vibrating screen H, and the first blocking member 6f is a flexible member. After both ends of the first blocking member 6f are fixed, it still has an extension margin for the reciprocating vibration of the vibrating screen H to avoid hindering the movement of the vibrating screen H.

[0037] like Figure 2As shown, a second blocking member 7f is fixed at one end of the first blocking member 6f on the front material plate 2f. The other end of the second blocking member 7f is a free end, which hangs down naturally onto the screen surface of the vibrating screen H. Double-layer isolation is achieved through the two blocking members set in the front and rear.

[0038] In this embodiment, both the first shielding member 6f and the second shielding member 7f are made of canvas.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A front sealing structure for a vibrating screen, characterized in that, include: A sealing element is fixed between the front material plate (2f) and the fan housing (3f) located below the front material plate (2f); the width of the sealing element is not less than the screen surface width of the vibrating screen (H) between the front material plate (2f) and the fan housing (3f); The two opposite sides of the seal in the width direction are respectively fixed to the left and right side walls of the frame (1); The sealing element is a sealing plate (1f); one end of the sealing plate (1f) is flanged and fixed to the lower plate surface of the front material plate (2f); the other end is fixed to the outer wall surface of the fan housing (3f).

2. The front sealing structure of the vibrating screen according to claim 1, characterized in that, The gap between the two sides of the seal and the left and right side walls of the frame (1) is filled with sealant.

3. The front sealing structure of the vibrating screen according to claim 2, characterized in that, At least one observation port (11f) is provided on the seal; a transparent viewing element (4f) is installed on the observation port (11f).

4. The front sealing structure of the vibrating screen according to claim 3, characterized in that, The viewing element (4f) is fastened to the observation port (11f) by a wing nut (8f).

5. The front sealing structure of the vibrating screen according to claim 4, characterized in that, The visible element (4f) is an acrylic sheet or a glass sheet.

6. The front sealing structure of the vibrating screen according to any one of claims 1-5, characterized in that, Also includes: The first shielding member (6f) is disposed between the front material plate (2f) and the screen front plate (5f) of the vibrating screen (H); the first shielding member (6f) is a flexible member with an extension margin for the vibrating screen (H) to reciprocate.

7. The front sealing structure of the vibrating screen according to claim 6, characterized in that, The width of the first shielding member (6f) is not less than the screen surface width of the vibrating screen (H).

8. The front sealing structure of the vibrating screen according to claim 6, characterized in that, Also includes: The second shielding member (7f) has one end fixed to the front material plate (2f) facing the vibrating screen (H), and the other end is a free end that hangs down naturally onto the screen surface of the vibrating screen (H).

9. The front sealing structure of the vibrating screen according to claim 8, characterized in that, Both the first shielding member (6f) and the second shielding member (7f) are made of canvas.

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