Threshing machine front panel, threshing machine, gap bridge welding structure and harvester

Abstract

The invention relates to a threshing machine front panel, a threshing machine, a gap bridge welding structure and a harvester, the threshing machine front panel comprises a front panel body and a grain leakage prevention structure, the front panel body is provided with a gap bridge assembly hole which is through in the front-back direction, and at least one of the left side and the right side of the gap bridge assembly hole is provided with the grain leakage prevention structure; the grain leakage prevention structure is fixed to the front panel body, and a part of the grain leakage prevention structure extends into the gap bridge assembly hole and can flexibly abut against the outer side wall of the gap bridge or the grain leakage prevention structure can blow positive pressure airflow into the gap bridge assembly hole. The grain leakage prevention structure is arranged on at least one of the left side and the right side of the gap bridge assembly hole of the front panel body, so that when the gap bridge is assembled into the gap bridge assembly hole, a grain leakage gap between the inner side wall of the gap bridge assembly hole and the outer side wall of the gap bridge can be flexibly blocked; the problem of grain leakage in the harvesting process after a grain leakage gap is generated between the thresher of the harvester and the gap bridge due to the assembly precision problem is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field related to agricultural machinery, and in particular to a thresher front panel, a thresher, a bridge welding structure and a harvester. Background Art

[0002] The widespread use of harvesters for harvesting presents a significant challenge, however, with the associated loss rate. Effectively reducing this rate is crucial for increasing grain production. Many factors contribute to this loss rate, but gaps between moving parts due to manufacturing issues are a common and irreversible phenomenon. Harvesters require tooling to ensure precision during assembly, and higher precision increases the cost. In line with the principle of cost reduction, a suitable structure is being developed to address this shortcoming without excessively increasing costs.

[0003] For example, when harvesting, there is a serious grain leakage phenomenon between the bridge and the side wall of the harvester. The main reason for this phenomenon is that there is a grain leakage gap 4 between the side wall of the threshing body 5 and the outer wall of the bridge 3. Figures 1 to 3 As shown. The reason for the grain leakage gap is that during the assembly process, the center position of the bridge 3 is not easy to coincide with the center line of the front assembly plate 52. In addition, this phenomenon occurs randomly and cannot be effectively controlled. The specific running beam process is that during the harvesting process of the harvester, the bridge will rotate at any time according to the cutting height. During the rotation, there is a deviation between the bridge and the threshing body. At the same time, the high-speed rotation of the bridge chain rake and the roller will increase the internal pressure of the body, and the wheat grains will be forced by the high pressure to fall into the gap between the inner side of the body and the outer wall of the bridge. If the gap between the two can be better controlled, relatively high-precision assembly tooling is required, which will bring high costs. This problem has become a bottleneck technical problem that urgently needs to be solved in the industry. Summary of the Invention

[0004] In order to solve one or more technical problems in the prior art, the present invention provides a thresher front panel, a thresher, a bridge welding structure and a harvester.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a front panel of a thresher, comprising a front panel body and a grain leakage prevention structure, the front panel body being provided with a bridge assembly hole which passes through from front to back, at least one of the left and right sides of the bridge assembly hole being provided with a grain leakage prevention structure, at least a portion of the grain leakage prevention structure being fixed on the front panel body, a portion of the grain leakage prevention structure extending into the bridge assembly hole and being able to flexibly abut against the outer side wall of the bridge or the grain leakage prevention structure being able to blow positive pressure airflow into the bridge assembly hole.

[0006] The beneficial effects of the present invention are as follows: the thresher front panel of the present invention is provided with a grain leakage prevention structure on at least one of the left and right sides of the bridge assembly hole of the front panel body. When the bridge is assembled into the bridge assembly hole, the grain leakage gap between the inner wall of the bridge assembly hole and the outer wall of the bridge can be flexibly blocked, thereby avoiding the problem of grain leakage during the harvesting process after the grain leakage gap is generated due to assembly accuracy problems between the thresher of the harvester and the bridge; even if the grain leakage gap between the bridge and the thresher increases during operation, it can be adaptively blocked based on the flexible abutment of the grain leakage prevention structure to avoid grain leakage. The present invention can also reduce assembly accuracy, assembly difficulty, and tooling and time investment during the assembly of the bridge; and when disassembling the bridge, it reduces disassembly difficulty and improves maintenance convenience.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a mounting plate is provided on at least one of the left and right sides of the bridge assembly hole, and a left and right through-hole plug-in hole is opened on the mounting plate. The anti-leakage grain structure is installed on the mounting plate, and a part of the anti-leakage grain structure can extend from the plug-in hole into the bridge assembly hole or the air outlet of the anti-leakage grain structure is adapted to be connected with the plug-in hole.

[0009] The beneficial effect of adopting the above further scheme is: by arranging a mounting plate on at least one of the left and right sides of the bridge assembly hole, and arranging a plug-in hole on the mounting plate, it is convenient to assemble the anti-leakage grain structure on the mounting plate and extend it into the bridge assembly hole to seal the grain leakage gap.

[0010] Furthermore, the plug-in hole is an elongated hole and its projected length on the front panel body is at least 2 / 3 of the upper and lower widths of the bridge assembly hole.

[0011] The beneficial effect of adopting the above further solution is that the assembly gap between the bridge and the threshing machine body can be effectively blocked by providing the long strip hole and reasonably limiting the long projection length thereof.

[0012] Furthermore, the plug-in hole includes a first plug-in hole and a second plug-in hole, the first plug-in hole is extended in the up-down direction, the second plug-in hole is inclined in the front-back direction below the first plug-in hole, and the first plug-in hole and the second plug-in hole are both provided with the anti-leakage grain structure.

[0013] The beneficial effect of adopting the above further scheme is: by setting two plug holes, and arranging one plug hole vertically and the other plug hole obliquely at the bottom, anti-leakage grain structures are installed in both plug holes, which can achieve anti-leakage grain on the sides and bottom of the leakage gap.

[0014] Furthermore, the anti-leakage grain structure includes a connecting portion and a flexible abutting portion, the connecting portion is fixed on the front panel body, and the flexible abutting portion is installed on the connecting portion and can extend into the bridge assembly hole.

[0015] The beneficial effect of adopting the above-mentioned further scheme is: by setting a flexible abutment part, it can flexibly abut against the outer wall of the bridge and effectively block the grain leakage gap. When the bridge and the thresher are working, even if the grain leakage gap increases, it can be ensured that the flexible abutment part continues to block the grain leakage gap.

[0016] Furthermore, the connecting portion includes a limiting clamping strip, which is fixed to the front panel body; the limiting clamping strip has a limiting cavity extending along its length, and a limiting hole extending along its length is formed on one side wall of the limiting clamping strip, the limiting hole being in communication with the limiting cavity; A portion of the flexible abutting portion is limited in the limiting cavity, the limiting hole is clamped in the middle of the flexible abutting portion, and another portion of the flexible abutting portion extends into the bridge assembly hole.

[0017] The beneficial effect of adopting the above further solution is that by providing the limiting clamping strips, the flexible abutting portion can be effectively clamped and limited, which facilitates the replacement and maintenance of the flexible abutting portion, and also facilitates the installation and fixation of the anti-leakage grain structure.

[0018] Furthermore, the connecting portion includes an L-shaped plate, one side wall of the L-shaped plate is fixed to the front panel body, and a part of the flexible abutting portion is fixed to the other side wall of the L-shaped plate.

[0019] The beneficial effect of adopting the above further solution is that by providing the L-shaped plate, it is convenient to install and fix the front panel body, and it is also convenient to install and fix the flexible abutting portion and the L-shaped plate.

[0020] Furthermore, the flexible abutting portion includes a brush or a flexible retaining skin.

[0021] The beneficial effect of adopting the above further scheme is: by setting the brush and flexible baffle, it is convenient to form a soft connection in the grain leakage gap, which can adapt to the distance change of the grain leakage gap between the bridge and the thresher due to the assembly accuracy during the operation.

[0022] Furthermore, the grain leakage prevention structure includes a positive pressure fan, and the air outlet of the positive pressure fan is a linear structure.

[0023] The beneficial effect of adopting the above further scheme is: by setting up a positive pressure fan, the positive pressure fan can blow into the grain leakage gap, so that the positive pressure fan forms a wind curtain in the grain leakage gap, which can effectively prevent the grain from being unloaded when the external wind pressure is greater than the internal wind pressure.

[0024] Furthermore, the positive pressure fan includes a fan body and a T-shaped air duct, the T-shaped air duct includes a first air duct and a second air duct, one end of the first air duct is vertically fixedly connected and communicated with the middle of the second air duct, the end of the second air duct facing away from the first air duct is an air outlet, and the outlet of the fan body is fixedly connected and communicated with the side wall of the first air duct.

[0025] The beneficial effect of adopting the above further solution is: by providing the fan body and the T-shaped air duct, it is convenient to adapt the length of the grain leakage gap, and it is convenient for the fan body to blow the air curtain into the grain leakage gap.

[0026] Furthermore, the anti-leakage grain structure also includes a flexible portion, which is fixed on the front panel body. The flexible portion extends into the bridge assembly hole and can flexibly abut against the outer side wall of the bridge.

[0027] The beneficial effect of adopting the above further scheme is: by setting up a flexible part, the positive pressure fan and the flexible part can be combined, that is, a wind curtain can be formed in the grain leakage gap, and the flexible part can also be used to achieve a soft connection with the side wall of the bridge, further avoiding the occurrence of grain leakage.

[0028] A thresher comprises a thresher body and the above-mentioned thresher front panel, wherein the thresher front panel is installed on the front side of the thresher body.

[0029] The beneficial effects of the present invention are as follows: the thresher of the present invention, by providing a thresher front panel with an anti-grain leakage structure, can effectively and flexibly seal the grain leakage gap between the thresher and the bridge due to assembly accuracy when assembled with the bridge. Even if the grain leakage gap becomes larger during operation, it can still be adaptively sealed to avoid grain leakage from the assembly gap.

[0030] A bridge welding structure includes a welding structure body and a grain leakage prevention structure. The grain leakage prevention structure is provided on a connecting plate at the connecting end of the welding structure body. At least a portion of the grain leakage prevention structure is located on the outer surface of the connecting plate and can be flexibly abutted against the inner surface of the bridge assembly hole of a thresher.

[0031] The beneficial effects of the present invention are as follows: the bridge welding structure of the present invention, by arranging a grain leakage prevention structure on the connecting plate at the connecting end of the welding structure body, can effectively and flexibly seal the grain leakage gap between the threshing body and the bridge welding structure due to assembly accuracy when the threshing body is assembled. Even if the grain leakage gap becomes larger during operation, it can still be adaptively sealed to avoid grain leakage from the assembly gap.

[0032] Furthermore, the grain leakage prevention structure includes a connecting portion and a flexible abutting portion, wherein the connecting portion is fixed to the connecting plate, and the flexible abutting portion is installed on the connecting portion and is located on the outer side of the connecting plate; The flexible abutting portion includes a brush or a flexible retaining skin.

[0033] The beneficial effect of adopting the above-mentioned further scheme is: by setting a flexible abutment part, it can flexibly abut against the outer wall of the bridge and effectively block the grain leakage gap. When the bridge and the thresher are working, even if the grain leakage gap increases, it can be ensured that the flexible abutment part continues to block the grain leakage gap.

[0034] A harvester includes a bridge and the above-mentioned thresher, one end of the bridge is inserted into the bridge assembly hole, a grain leakage gap is formed between the outer wall of the bridge and the inner wall of the bridge assembly hole, and a part of the anti-grain leakage structure is placed in the grain leakage gap.

[0035] The beneficial effects of the present invention are as follows: the harvester of the present invention, by arranging a grain leakage prevention structure on the thresher, can effectively and flexibly seal the grain leakage gap between the thresher and the bridge due to assembly accuracy; even if the grain leakage gap becomes larger during operation, it can still be adaptively blocked to avoid grain leakage from the assembly gap.

[0036] A harvester includes a threshing machine body and the above-mentioned bridge welding structure, wherein the connecting end of the bridge welding structure is inserted into the front assembly plate of the threshing machine body, a grain leakage gap is formed between the outer wall of the connecting plate and the inner wall of the bridge assembly hole, and at least a part of the grain leakage prevention structure is placed in the grain leakage gap.

[0037] The beneficial effects of the present invention are as follows: the harvester of the present invention, by arranging an anti-grain leakage structure on the bridge welding structure, can effectively and flexibly seal the grain leakage gap between the threshing body and the bridge welding structure due to the assembly accuracy; even if the grain leakage gap becomes larger during operation, it can be adaptively sealed to avoid grain leakage from the assembly gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of the threshing machine body and the bridge assembly; Figure 2 for Figure 1 BB cross-sectional structure diagram; Figure 3 for Figure 2 The enlarged structural diagram of the middle D part; Figure 4 It is a schematic diagram of the three-dimensional structure of the front panel of the thresher of the present invention; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle part A; Figure 6 This is a schematic diagram of the main structure of a grain leakage prevention structure of the present invention; Figure 7 This is a schematic top view of one structural form of the grain leakage prevention structure of the present invention; Figure 8 This is a schematic cross-sectional view of one structural form of the grain leakage prevention structure of the present invention; Figure 9 This is a preferred arrangement form of the grain leakage prevention structure of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of another structural form of the grain leakage prevention structure of the present invention; Figure 11 This is a schematic diagram of the structure of the connection between the L-shaped plate and the flexible barrier skin of the present invention; Figure 12 It is a schematic diagram of the three-dimensional structure of the thresher and the bridge assembly of the present invention; Figure 13 for Figure 12 Schematic diagram of the enlarged structure of the middle C part; Figure 14 It is a schematic diagram of the three-dimensional structure of the bridge welding structure of the present invention; Figure 15 This is a schematic diagram of the main structure of the third structural form of the grain leakage prevention structure of the present invention; Figure 16 This is a schematic diagram of the three-dimensional structure of the third structural form of the grain leakage prevention structure of the present invention; Figure 17 This is a schematic cross-sectional view of the third structural form of the grain leakage prevention structure of the present invention; Figure 18 for Figure 17 Schematic diagram of the enlarged structure of part B in the middle.

[0039] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Front panel body; 11. Bridge assembly hole; 12. Mounting plate; 13. Fixing block; 14. Plug hole; 2. Anti-leakage structure; 21. Limiting clamping strip; 22. Fixed plate; 23. L-shaped plate; 24. Brush; 25. Flexible retaining wall; 26. Fan body; 27. T-shaped air duct; 28. Flexible part; 3. Bridge; 31. Welded structure body; 32. Connecting plate; 4. Leakage gap; 5. Thresher body; 51. Thresher; 52. Front assembly plate. DETAILED DESCRIPTION

[0040] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0041] Example 1 like Figures 4 to 18 As shown, a front panel of a thresher in this embodiment includes a front panel body 1 and an anti-leakage grain structure 2, the front panel body 1 is provided with a bridge assembly hole 11 which passes through from front to back, at least one of the left and right sides of the bridge assembly hole 11 is provided with an anti-leakage grain structure 2, at least a part of the anti-leakage grain structure 2 is fixed on the front panel body 1, and a part of the anti-leakage grain structure 2 extends into the bridge assembly hole 11 and can flexibly abut against the outer wall of the bridge 3.

[0042] In this embodiment, the grain leakage prevention structure 2 can adopt various structural forms. For example, a flexible sealing strip can be directly fixed in the bridge assembly hole.

[0043] This embodiment provides two preferred solutions for the grain leakage prevention structure 2, as shown below: The preferred solution 1 of the anti-leakage grain structure 2 is as follows: Figures 4 to 13 As shown, the grain leakage prevention structure 2 includes a connecting portion and a flexible abutting portion. The connecting portion is fixed to the front panel body 1, and the flexible abutting portion is installed on the connecting portion and can extend into the bridge assembly hole 11. By providing the flexible abutting portion, it can flexibly abut against the outer wall of the bridge and effectively block the grain leakage gap. When the bridge and thresher are in operation, even if the grain leakage gap increases, the flexible abutting portion can continue to block the grain leakage gap.

[0044] Further optional, such as Figures 5 to 10 As shown, the connecting portion includes a limiting clamping strip 21, which is fixed to the front panel body 1; the limiting clamping strip 21 has a limiting cavity extending along its length, and a limiting hole extending along its length is opened on one side wall of the limiting clamping strip 21, and the limiting hole is connected to the limiting cavity; a portion of the flexible abutting portion is limited in the limiting cavity, the limiting hole is engaged in the middle of the flexible abutting portion, and the other portion of the flexible abutting portion extends into the bridge assembly hole 11. By providing the limiting clamping strip, the flexible abutting portion can be effectively clamped and limited, which facilitates the replacement and maintenance of the flexible abutting portion, and also facilitates the installation and fixation of the anti-leakage grain structure.

[0045] In order to facilitate the fixation of the limiting clamp strip 21 on the front panel body 1, that is, the fixation on the mounting plate 12 in the subsequent embodiments, a fixing plate 22 can be provided on the side of the limiting clamp strip 21 away from the flexible abutment portion, and the fixing plate 22 extends to one side of the limiting clamp strip 21. When the limiting clamp strip 21 is assembled on the mounting plate 12, the fixing plate 22 is located on one side of the limiting clamp strip 21 and a gap is reserved between the fixing plate 22 and the mounting plate 12. A fixing block 13 can be provided in the gap, and the fixing block 13 can be welded to the side surface of the mounting plate 12 away from the bridge assembly hole 11, and then the fixing plate 22 and the fixing block 13 are fixedly connected by bolts.

[0046] Optionally, the flexible abutment portion includes a brush 24 or a flexible retaining wall 25. The brush and retaining wall facilitate a flexible connection within the grain leakage gap, adapting to variations in the grain leakage gap between the bridge and the thresher during operation due to assembly precision. The brush or retaining wall can be installed and secured using Phillips pan head screws. The brush can be braided into a row of PP long strands.

[0047] The preferred solution 2 of the anti-leakage grain structure 2 is different from the preferred solution 1 mentioned above in that Figure 11 As shown, in this preferred embodiment 2, the connecting portion includes an L-shaped plate 23, one side wall of the L-shaped plate 23 is fixed to the front panel body 1, and a portion of the flexible abutting portion is fixed to the other side wall of the L-shaped plate 23. The provision of the L-shaped plate facilitates installation and fixation with the front panel body, and also facilitates installation and fixation of the flexible abutting portion and the L-shaped plate.

[0048] Optionally, the flexible abutment portion includes a brush 24 or a flexible baffle 25. By providing the brush and the flexible baffle, a soft connection is formed in the grain leakage gap, which can adapt to the change in the spacing between the bridge and the thresher due to the assembly accuracy during operation.

[0049] In this embodiment, the connecting portion may be made of a flat plate or a splint structure in addition to the above structure. The flexible contact portion may be made of other flexible materials in addition to the brush 24 or the flexible retaining skin 25.

[0050] The grain leakage prevention structure 2 of this embodiment is fixed near the bridge assembly hole 11 of the front panel body 1. It can be fixed by relying on the existing structure of the front panel body 1 itself, or it can be separately set on the front panel body 1 for fixation.

[0051] The grain leakage prevention structure 2 of this embodiment preferably adopts a linear structure to adapt to and seal the grain leakage gap 4.

[0052] The front panel of the thresher of this embodiment is provided with an anti-leakage grain structure on at least one of the left and right sides of the bridge assembly hole of the front panel body. When the bridge is assembled into the bridge assembly hole, the grain leakage gap between the inner wall of the bridge assembly hole and the outer wall of the bridge can be flexibly sealed, thereby avoiding the problem of grain leakage during the harvesting process due to the grain leakage gap caused by assembly accuracy problems between the thresher of the harvester and the bridge; even if the grain leakage gap between the bridge and the thresher increases during operation, it can be adaptively sealed based on the flexible abutment of the anti-leakage grain structure to avoid grain leakage.

[0053] Example 2 This embodiment provides a different structural mode of the front panel of the thresher, which can still play the role of flexibly blocking the gap of grain leakage. Figures 14 to 18 As shown, a front panel of a thresher in this embodiment includes a front panel body 1 and a grain leakage prevention structure 2. A bridge assembly hole 11 that passes through the front and back is opened on the front panel body 1. The grain leakage prevention structure 2 is provided on at least one of the left and right sides of the bridge assembly hole 11. At least a part of the grain leakage prevention structure 2 is fixed on the front panel body 1, and the grain leakage prevention structure 2 can blow positive pressure airflow into the bridge assembly hole 11.

[0054] Specifically, the grain leakage prevention structure 2 includes a positive pressure fan. The positive pressure fan can be installed anywhere on the harvester, as long as the air outlet can blow positive pressure air into the bridge assembly hole 11. The air outlet of the positive pressure fan has a linear structure. By installing the positive pressure fan, it can blow into the grain leakage gap, forming an air curtain in the grain leakage gap. When the external wind pressure exceeds the internal wind pressure, it can effectively prevent the grain from being discharged.

[0055] A specific solution of this embodiment is as follows: Figure 15 and Figure 16 As shown, the positive pressure fan includes a fan body 26 and a T-shaped air duct 27. The T-shaped air duct 27 includes a first air duct and a second air duct. One end of the first air duct is vertically fixedly connected and communicated with the middle of the second air duct. The end of the second air duct facing away from the first air duct is an air outlet. The outlet of the fan body 26 is fixedly connected and communicated with the side wall of the first air duct. By setting the fan body and the T-shaped air duct, it is convenient to adapt the length of the grain leakage gap, and it is convenient for the fan body to blow an air curtain into the grain leakage gap. The second air duct of this embodiment is a narrow and long structure, which can be adapted to the length of the grain leakage gap. In the following embodiment, the plug hole 14 on the mounting plate 12 near the bridge assembly hole 11 is adapted to the plug hole 14, and the second air duct can be plugged into the plug hole 14, or it can be sealed (with a sealing strip) and docked around the plug hole 14 to avoid air leakage.

[0056] Of course, in addition to the above-mentioned T-shaped air duct 27, other structures of air ducts can also be used to provide positive pressure wind for the grain leakage gap. The fan body 26 can be set on the side wall of the T-shaped air duct 27 (saving assembly space) or at the end of the T-shaped air duct 27.

[0057] The front panel of the thresher of this embodiment adopts a fan body combined with a T-shaped air duct. The T-shaped air duct can be pressurized and can draw wind from the whole machine. The drawn wind is pressurized through the T-shaped air duct and flows to the gap between the inner wall of the thresher body and the outer wall of the bridge through the plug hole.

[0058] Example 3 On the basis of Example 1 or Example 2, a preferred solution of this embodiment is as follows: Figure 4 、 Figure 5 and Figure 10 As shown, a mounting plate 12 is provided on at least one of the left and right sides of the bridge assembly hole 11. The mounting plate 12 is provided with left and right through-holes 14. The grain leakage prevention structure 2 is mounted on the mounting plate 12. A portion of the grain leakage prevention structure 2 can extend through the through-holes 14 into the bridge assembly hole 11, or the air outlet of the grain leakage prevention structure 2 can be adapted to be mated with the through-holes 14. By providing mounting plates on at least one of the left and right sides of the bridge assembly hole and providing the through-holes on the mounting plates, the grain leakage prevention structure can be easily mounted on the mounting plates and extended into the bridge assembly hole to seal the grain leakage gap.

[0059] Preferably, Figure 4 and Figure 5 As shown, in this embodiment, a mounting plate 12 is provided on each side of the left and right sides of the bridge assembly hole 11. The mounting plate 12 is arranged vertically, so that the anti-leakage grain structure 2 installed thereon is also arranged vertically, which can effectively seal the grain leakage gap 4 on the side between the bridge and the bridge assembly hole 11.

[0060] The length of the flexible abutment portion of this embodiment is adapted to the length of the plug hole 14, and the length of the air outlet of the positive pressure fan is also adapted to the length of the plug hole, ensuring that the entire length area where the plug hole 14 is located has a grain leakage-proof structure.

[0061] In this embodiment, the grain leakage prevention structure 2 can be directly fixed on the inner side of the mounting plate 12. Since the grain leakage gap 4 itself is very narrow, Figures 1 to 4 As shown, the present embodiment preferably opens a plug hole 14, so that only the flexible abutment portion that can prevent grain leakage is placed in the grain leakage gap 4, which is compactly assembled and does not affect the assembly between the bridge and the thresher, while also preventing grain leakage.

[0062] Example 4 Based on Example 3, an optional solution of this embodiment is that the plug hole 14 is an elongated hole and its projected length on the front panel body 1 is at least 2 / 3 of the upper and lower width of the bridge assembly hole 11. By providing an elongated hole and reasonably limiting its long projected length, the assembly gap between the bridge and the threshing machine body can be effectively blocked.

[0063] In this embodiment, since soft leather is provided at the upper and lower ends between the bridge and the thresher for corner or end sealing in conventional assembly, this embodiment limits the size of the plug-in hole 14, which can ensure that the grain leakage gap 4 existing after the bridge and the thresher are assembled can almost be covered by the anti-grain leakage structure 2 in the plug-in hole.

[0064] Example 5 Based on Example 3 or Example 4, this embodiment provides a preferred arrangement scheme for preventing grain leakage. Figure 9 As shown, the plug hole includes a first plug hole and a second plug hole, the first plug hole is arranged in an extending direction in the up-down direction, and the second plug hole is arranged obliquely in the front-to-back direction below the first plug hole, and the first plug hole and the second plug hole are both provided with the anti-leakage grain structure 24. The second plug hole is tilted in a manner with the front higher and the back lower. By providing two plug holes, and arranging one plug hole vertically and the other plug hole obliquely arranged below, and installing the anti-leakage grain structure in both plug holes, it is possible to prevent grain leakage from the sides and bottom of the grain leakage gap.

[0065] Example 6 In addition to Example 2, the grain leakage prevention structure 2 of this embodiment further includes a flexible portion 28, which is fixed to the front panel body 1. The flexible portion 28 extends into the bridge assembly hole 11 and is capable of flexibly abutting against the outer wall of the bridge 3. The provision of the flexible portion combines the positive pressure blower and the flexible portion, forming an air curtain in the grain leakage gap. The flexible portion also enables a flexible connection with the bridge sidewall, further preventing grain leakage.

[0066] Specifically, such as Figure 17 and Figure 18 As shown, the flexible portion 28 of this embodiment can be made of a brush or a flexible baffle, and the brush only uses the brush body portion of the flexible strip. In this way, the positive pressure fan is combined with the flexible portion 28 to better prevent food leakage.

[0067] In this embodiment, a circle of flexible part 28 can be set around the plug hole. The flexible part 28 can be combined with the positive pressure fan. When positive pressure wind is blown into the plug hole, the flexible part can be driven to swing. The wind force plus the flexible part can form a moving wind curtain in the grain leakage gap. When the external wind pressure is greater than the internal wind pressure, it can effectively prevent the grains from being unloaded.

[0068] Example 7 On the basis of any one of Embodiments 1 to 6, this embodiment provides a thresher 51, comprising a thresher body and the above-mentioned thresher front panel, wherein the thresher front panel is mounted on the front side of the thresher body.

[0069] The thresher of this embodiment is provided with a front panel of the thresher with a grain leakage prevention structure. When assembled with the bridge, the grain leakage gap between the thresher and the bridge due to the assembly accuracy can be effectively and flexibly blocked. Even if the grain leakage gap becomes larger during operation, it can be adaptively blocked to prevent grain from leaking from the assembly gap.

[0070] Example 8 like Figure 14 As shown, a bridge welding structure of this embodiment includes a welding structure body 31 and an anti-grain leakage structure 2. The anti-grain leakage structure 2 is provided on the connecting plate 32 at the connecting end of the welding structure body 31. At least a portion of the anti-grain leakage structure 2 is located on the outer surface of the connecting plate 32 and can be flexibly abutted on the inner surface of the bridge assembly hole 11 of the thresher 51.

[0071] The grain leakage prevention structure 2 includes a connecting portion and a flexible abutting portion. The connecting portion is fixed on the connecting plate 32. The flexible abutting portion is installed on the connecting portion and is located on the outer side of the connecting plate 32. The flexible abutting portion includes a brush 24 or a flexible baffle 25. By providing a flexible abutting portion, it can flexibly abut against the outer side wall of the bridge and effectively block the grain leakage gap. When the bridge and the thresher are working, even if the grain leakage gap increases, it can be ensured that the flexible abutting portion continues to block the grain leakage gap. The grain leakage prevention structure 2 of this embodiment can adopt the grain leakage prevention structure 2 described in Example 1. The difference from Example 1 is that the grain leakage prevention structure 2 of this embodiment is provided on the welded structural body 31 of the bridge, and still blocks the grain leakage gap. The specific structural form of the grain leakage prevention structure 2 will not be repeated.

[0072] The bridge welding structure of this embodiment provides a grain leakage prevention structure on the connecting plate at the connecting end of the welding structure body. When the threshing machine body is assembled, the grain leakage gap between the threshing machine body and the bridge welding structure due to assembly accuracy can be effectively and flexibly blocked. Even if the grain leakage gap becomes larger during operation, it can still be adaptively blocked to prevent grain from leaking from the assembly gap.

[0073] Example 9 This embodiment provides a harvester, including a bridge 3 and the thresher 51 of the above-mentioned embodiment 7, one end of the bridge 3 is inserted into the bridge assembly hole 11, and a grain leakage gap 4 is formed between the outer wall of the bridge 3 and the inner wall of the bridge assembly hole 11, and a part of the anti-grain leakage structure 2 is placed in the grain leakage gap 4.

[0074] The bridge 3 in this embodiment includes the welded structure body 31 of the embodiment 8, but does not have a grain leakage prevention structure.

[0075] The harvester of this embodiment can effectively and flexibly seal the grain leakage gap between the thresher and the bridge due to assembly accuracy by providing an anti-grain leakage structure on the thresher. Even if the grain leakage gap becomes larger during operation, it can still be adaptively sealed to avoid grain leakage from the assembly gap.

[0076] Example 10 This embodiment provides a harvester, including a threshing body 5 and the bridge welding structure of the above-mentioned embodiment 8, the connecting end of the bridge welding structure is inserted into the front assembly plate 52 of the threshing body 5, and a grain leakage gap 4 is formed between the outer wall of the connecting plate 32 and the inner wall of the bridge assembly hole 11, and at least a part of the anti-grain leakage structure 2 is placed in the grain leakage gap 4.

[0077] The threshing machine body 5 of this embodiment is actually the threshing machine body of embodiment 7, and different names are used to distinguish them.

[0078] The harvester of this embodiment can effectively and flexibly seal the grain leakage gap between the threshing machine body and the bridge welding structure due to assembly accuracy by arranging an anti-grain leakage structure on the bridge welding structure. Even if the grain leakage gap becomes larger during operation, it can still be adapted and sealed to avoid grain leakage from the assembly gap.

[0079] In the description of the present invention, it should be understood that the terms "center", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0080] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0081] In the present invention, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0082] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0083] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0084] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A thresher front panel, characterized in that: It includes a front panel body and an anti-leakage grain structure, the front panel body is provided with a bridge assembly hole that passes through from front to back, at least one of the left and right sides of the bridge assembly hole is provided with an anti-leakage grain structure, at least a part of the anti-leakage grain structure is fixed to the front panel body, a part of the anti-leakage grain structure extends into the bridge assembly hole and can flexibly abut against the outer side wall of the bridge or the anti-leakage grain structure can blow positive pressure airflow into the bridge assembly hole.

2. A thresher front panel according to claim 1, characterized in that: A mounting plate is provided on at least one of the left and right sides of the bridge assembly hole, and a left and right through-hole plug-in hole is opened on the mounting plate. The anti-leakage grain structure is installed on the mounting plate, and a part of the anti-leakage grain structure can extend into the bridge assembly hole from the plug-in hole or the air outlet of the anti-leakage grain structure is adapted to be connected with the plug-in hole.

3. A thresher front panel according to claim 2, characterized in that: The plug-in hole is an elongated hole and its projected length on the front panel body is at least 2 / 3 of the upper and lower widths of the bridge assembly hole.

4. A thresher front panel according to claim 2, characterized in that: The plug-in hole includes a first plug-in hole and a second plug-in hole. The first plug-in hole is extended in the up-down direction, and the second plug-in hole is tilted in the front-back direction below the first plug-in hole. The anti-leakage grain structure is provided in both the first plug-in hole and the second plug-in hole.

5. A thresher front panel according to any one of claims 1 to 4, characterized in that: The anti-leakage grain structure includes a connecting portion and a flexible abutting portion. The connecting portion is fixed on the front panel body, and the flexible abutting portion is installed on the connecting portion and can extend into the bridge assembly hole.

6. A thresher front panel according to claim 5, characterized in that: The connecting portion includes a limiting clamping strip, which is fixed to the front panel body; the limiting clamping strip has a limiting cavity extending along its length, and a limiting hole extending along its length is formed on one side wall of the limiting clamping strip, the limiting hole being in communication with the limiting cavity; A portion of the flexible abutting portion is limited in the limiting cavity, the limiting hole is clamped in the middle of the flexible abutting portion, and another portion of the flexible abutting portion extends into the bridge assembly hole.

7. A thresher front panel according to claim 5, characterized in that: The connecting portion includes an L-shaped plate, one side wall of the L-shaped plate is fixed to the front panel body, and a part of the flexible abutting portion is fixed to the other side wall of the L-shaped plate.

8. A thresher front panel according to claim 5, characterized in that: The flexible abutting portion includes a brush or a flexible retaining skin.

9. A thresher front panel according to any one of claims 1 to 4, characterized in that: The grain leakage prevention structure includes a positive pressure fan, and the air outlet of the positive pressure fan is a linear structure.

10. A thresher front panel according to claim 9, characterized in that: The positive pressure fan includes a fan body and a T-shaped air duct, the T-shaped air duct includes a first air duct and a second air duct, one end of the first air duct is vertically fixedly connected and communicated with the middle of the second air duct, the end of the second air duct facing away from the first air duct is an air outlet, and the outlet of the fan body is fixedly connected and communicated with the side wall of the first air duct.

11. The thresher front panel according to claim 9, characterized in that: The anti-leakage grain structure also includes a flexible portion, which is fixed on the front panel body. The flexible portion extends into the bridge assembly hole and can be flexibly abutted against the outer side wall of the bridge.

12. A thresher, characterized in that: The thresher comprises a thresher body and a thresher front panel according to any one of claims 1 to 11, wherein the thresher front panel is mounted on the front side of the thresher body.

13. A bridge welding structure, characterized in that: It includes a welding structure body and an anti-leakage grain structure. The anti-leakage grain structure is provided on the connecting plate at the connecting end of the welding structure body. At least a part of the anti-leakage grain structure is located on the outer surface of the connecting plate and can be flexibly abutted against the inner side of the bridge assembly hole of the thresher.

14. The bridge welding structure according to claim 13, characterized in that: The grain leakage prevention structure includes a connecting portion and a flexible abutting portion, wherein the connecting portion is fixed to the connecting plate, and the flexible abutting portion is installed on the connecting portion and is located on the outer side of the connecting plate; The flexible abutting portion includes a brush or a flexible retaining skin.

15. A harvester, characterized in that: It comprises a bridge and the thresher according to claim 12, one end of the bridge is inserted into the bridge assembly hole, a grain leakage gap is formed between the outer wall of the bridge and the inner wall of the bridge assembly hole, and a part of the grain leakage prevention structure is placed in the grain leakage gap.

16. A harvester, characterized in that: It comprises a threshing machine body and the bridge welding structure according to claim 13 or 14, wherein the connecting end of the bridge welding structure is inserted into the front assembly plate of the threshing machine body, a grain leakage gap is formed between the outer wall of the connecting plate and the inner wall of the bridge assembly hole, and at least a part of the grain leakage prevention structure is placed in the grain leakage gap.

Images