A threshing machine front panel, a threshing machine, a bridge weld structure and a harvester

Abstract

The present application relates to a threshing machine front panel, a threshing machine, a bridge welding structure and a harvester, a threshing machine front panel comprises a front panel body and a grain leakage prevention structure, a front and back through bridge assembly hole is formed in the front panel body, at least one side of the left and right sides of the bridge assembly hole is provided with the grain leakage prevention structure, the grain leakage prevention structure is fixed on the front panel body, part of the grain leakage prevention structure extends into the bridge assembly hole and can be flexibly abutted on the outer side wall of the bridge, or the grain leakage prevention structure can blow positive pressure airflow into the bridge assembly hole. The present application sets the grain leakage prevention structure on at least one side 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 leakage gap between the inner side wall of the bridge assembly hole and the outer side wall of the bridge can be flexibly blocked, so as to avoid the leakage gap between the threshing machine and the bridge of the harvester due to assembly precision problems, and the problem of grain leakage during the harvesting process.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a thresher front panel, a thresher, a bridge welded structure, and a harvester. Background Technology

[0002] Currently, while harvesters are widely used for harvesting, the challenge of high harvesting loss rates remains. Effectively reducing these losses is crucial for increasing grain yield. Many factors influence the loss rate, but a common and irreversible issue is the presence of assembly gaps between moving parts due to manufacturing defects. Harvesters require tooling during assembly to ensure precision, and higher precision results in increased costs. Adhering to the principle of cost reduction, this deficiency can be mitigated through appropriate structural design without incurring excessive expenses.

[0003] For example, during harvesting, there is a common problem of severe grain leakage between the threshing machine's bridge and the machine's side wall. The main reason for this phenomenon is the grain leakage gap 4 between the side wall of the threshing machine body 5 and the outer wall of the bridge 3. Figures 1-3 As shown. The reason for the grain leakage gap is that the center position of the bridge 3 and the center line of the front assembly plate 52 are not easily aligned during the assembly process. In addition, this phenomenon occurs randomly and cannot be effectively controlled. Specifically, during the harvesting process, the bridge rotates at any time according to the cutting height. During the rotation, there is a deviation between the bridge and the threshing machine body. At the same time, the high-speed rotation of the bridge chain rake and the drum increases the internal pressure of the machine body. Wheat grains are then caused to fall through the gap between the inner side of the machine body and the outer wall of the bridge under high pressure. If the gap between the two can be better controlled, high-precision assembly tooling is required, which will lead to high costs. This problem has become a bottleneck technology problem that urgently needs to be solved in the industry. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the present invention provides a thresher front panel, a thresher, a bridge welded 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, wherein the front panel body is provided with a through-bridge assembly hole, and at least one side of the through-bridge assembly hole is provided with a grain leakage prevention structure, wherein at least a portion of the grain leakage prevention structure is fixed to the front panel body, wherein a portion of the grain leakage prevention structure extends into the through-bridge assembly hole and can flexibly abut against the outer side wall of the through-bridge, or wherein the grain leakage prevention structure can blow positive pressure airflow into the through-bridge assembly hole.

[0006] The beneficial effects of this invention are as follows: The front panel of the thresher of this invention, by providing a grain-leakage-proof structure on at least one side of the bridge assembly hole on both sides of the front panel body, can flexibly seal the grain-leakage gap between the inner wall of the bridge assembly hole and the outer wall of the bridge when the bridge is assembled into the bridge assembly hole. This avoids grain leakage during harvesting caused by grain leakage gaps between the thresher and the bridge due to assembly precision issues. Even if the grain leakage gap between the bridge and the thresher increases during operation, it can still be sealed by the flexible contact of the grain-leakage-proof structure, preventing grain leakage. This invention also reduces assembly precision, assembly difficulty, and the investment of tooling and time during bridge assembly; moreover, it reduces disassembly difficulty and improves maintenance convenience when disassembling the bridge.

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

[0008] Furthermore, at least one side of the bridge assembly hole is provided with an installation plate, and the installation plate is provided with a through insertion hole. The anti-leakage structure is installed on the installation plate, and a part of the anti-leakage structure can extend into the bridge assembly hole from the insertion hole or the air outlet of the anti-leakage structure can be matched and connected with the insertion hole.

[0009] The beneficial effect of adopting the above-mentioned further solution is that by setting an installation plate on at least one side of the bridge assembly hole and setting a plug hole on the installation plate, it is convenient to assemble the anti-leakage structure on the installation plate and extend it into the bridge assembly hole to seal the gap of grain leakage.

[0010] Furthermore, the insertion hole is an elongated hole, and its projected length on the front panel body is at least 2 / 3 of the vertical width of the bridge mounting hole.

[0011] The beneficial effect of adopting the above-mentioned further solution is that by setting an elongated hole and reasonably limiting its long projected length, the assembly gap between the bridge and the threshing machine body can be effectively sealed.

[0012] Furthermore, the insertion hole includes a first insertion hole and a second insertion hole. The first insertion hole extends vertically, and the second insertion hole is inclinedly arranged below the first insertion hole in the front-back direction. Both the first insertion hole and the second insertion hole are provided with the anti-leakage structure.

[0013] The beneficial effect of adopting the above-mentioned further solution is that by setting two insertion holes, one insertion hole is arranged vertically and the other insertion hole is arranged obliquely below, and a grain leakage prevention structure is installed in both insertion holes, grain leakage prevention can be achieved on the side and bottom of the grain leakage gap.

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

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

[0016] Furthermore, the connecting part includes a limiting clamp strip, which is fixed to the front panel body; the limiting clamp strip has a limiting cavity extending along its own length direction, and a limiting hole extending along its own length direction is opened on one side wall of the limiting clamp strip, the limiting hole communicating with the limiting cavity. A portion of the flexible abutment is confined within the limiting cavity, the limiting hole is engaged with the middle of the flexible abutment, and another portion of the flexible abutment extends into the bridge assembly hole.

[0017] The beneficial effects of adopting the above-mentioned further solution are: by setting the limiting clamp strip, the flexible abutment part can be effectively clamped and limited, which facilitates the replacement and maintenance of the flexible abutment part, and also facilitates the installation and fixing of the anti-leakage grain structure.

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

[0019] The beneficial effects of adopting the above-mentioned further solution are: by setting the L-shaped plate, it is convenient to install and fix it with the front panel body, and it is also convenient to install and fix the flexible abutment part with the L-shaped plate.

[0020] Furthermore, the flexible contact portion includes a brush or a flexible baffle.

[0021] The beneficial effect of adopting the above-mentioned further solution is that by setting up brushes and flexible baffles, it is convenient to form a soft connection in the grain leakage gap, which can adapt to the spacing changes of the grain leakage gap between the bridge and the thresher during the working process due to the assembly precision.

[0022] Furthermore, the anti-leakage structure includes a positive pressure fan, and the air outlet of the positive pressure fan has a linear structure.

[0023] The beneficial effect of adopting the above-mentioned further solution is that 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 an air curtain in the grain leakage gap. When the external air pressure is greater than the internal air pressure, it can effectively prevent the grain from being discharged.

[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 and fixedly connected to the middle of the second air duct and communicates with it. The end of the second air duct away from the first air duct is the air outlet. The outlet of the fan body is fixedly connected to and communicates with the side wall of the first air duct.

[0025] The beneficial effect of adopting the above-mentioned further solution is that by setting up the fan body and T-shaped air duct, it is convenient to adapt to 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 structure also includes a flexible part, which is fixed to the front panel body and 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-mentioned further solution is that by setting up a flexible part, the positive pressure fan and the flexible part can be combined, which can form an air curtain in the grain leakage gap, and can also use the flexible part to achieve a soft connection with the side wall of the bridge, further avoiding the occurrence of grain leakage.

[0028] A threshing machine includes a threshing machine body and a front panel of the threshing machine described above, wherein the front panel of the threshing machine is installed on the front side of the threshing machine body.

[0029] The beneficial effects of the present invention are as follows: The thresher of the present invention, by setting a front panel with a grain leakage prevention structure, can effectively and flexibly seal the grain leakage gap between the thresher and the bridge due to assembly precision when assembling with the bridge. Even if the grain leakage gap increases during operation, it can still be sealed to prevent 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 the 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 side of the connecting plate and can flexibly abut against the inner side of the bridge assembly hole of the thresher.

[0031] The beneficial effects of the present invention are as follows: The bridge welding structure of the present invention, by setting an anti-leakage structure on the connecting plate at the connecting end of the welding structure body, can effectively and flexibly seal the gap between the threshing machine body and the bridge welding structure due to the assembly precision when the threshing machine body is assembled. Even if the gap increases during operation, it can still be sealed to prevent grain from leaking from the assembly gap.

[0032] Furthermore, the anti-leakage structure includes a connecting part and a flexible abutment part. The connecting part is fixed on the connecting plate, and the flexible abutment part is installed on the connecting part and located on the outer side of the connecting plate. The flexible contact part includes a brush or a flexible baffle.

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

[0034] A harvester includes a bridge and the thresher described above, one end of the bridge is inserted into the bridge mounting hole, a grain leakage gap is formed between the outer side wall of the bridge and the inner side wall of the bridge mounting hole, and a portion of the anti-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 setting an anti-leakage structure on the thresher, can effectively and flexibly seal the gap between the thresher and the bridge that exists due to assembly precision. Even when the gap increases during operation, it can be adapted to seal and prevent grain from leaking out of the assembly gap.

[0036] A harvester includes a threshing body and the aforementioned bridge welding structure. The connecting end of the bridge welding structure is inserted into the front assembly plate of the threshing body. A grain leakage gap is formed between the outer side wall of the connecting plate and the inner side wall of the bridge assembly hole. At least a portion of the anti-leakage structure is placed within the grain leakage gap.

[0037] The beneficial effects of the present invention are as follows: The harvester of the present invention, by setting an anti-leakage structure on the bridge welded structure, can effectively and flexibly seal the gap between the threshing machine body and the bridge welded structure that exists due to assembly precision. Even when the gap increases during operation, it can be adapted to seal and prevent grain from leaking from the assembly gap. Attached Figure Description

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

[0039] The attached diagram lists the components represented by each number as follows: 1. Front panel body; 11. Bridge mounting hole; 12. Mounting plate; 13. Fixing block; 14. Insertion hole; 2. Leak-proof grain structure; 21. Limiting clamp strip; 22. Fixing plate; 23. L-shaped plate; 24. Brush; 25. Flexible baffle; 26. Fan body; 27. T-shaped air duct; 28. Flexible part; 3. Bridge; 31. Welded structural body; 32. Connecting plate; 4. Grain leakage gap; 5. Threshing machine body; 51. Threshing machine; 52. Front assembly plate. Detailed Implementation

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

[0041] Example 1 like Figures 4-18 As shown, a front panel of a thresher in this embodiment includes a front panel body 1 and a grain leakage prevention structure 2. The front panel body 1 has a through-hole 11. At least one side of the through-hole 11 is provided with a grain leakage prevention structure 2. At least a part of the grain leakage prevention structure 2 is fixed to the front panel body 1. A part of the grain leakage prevention structure 2 extends into the through-hole 11 and can flexibly abut against the outer wall of the through-hole 3.

[0042] In this embodiment, the anti-leakage structure 2 can adopt various structural forms, such as using a flexible sealing strip directly fixed in the bridge assembly hole.

[0043] This embodiment provides two preferred solutions for the anti-leakage grain structure 2, as shown below: Preferred option one for the anti-leakage grain structure 2, such as... Figures 4-13 As shown, the anti-leakage structure 2 includes a connecting part and a flexible abutment part. The connecting part is fixed to the front panel body 1, and the flexible abutment part is installed on the connecting part and can extend into the bridge assembly hole 11. By providing the flexible abutment part, it can flexibly abut against the outer wall of the bridge and effectively seal the grain leakage gap. When the bridge and the thresher are working, even if the grain leakage gap increases, the flexible abutment part can still ensure that the grain leakage gap is continuously sealed.

[0044] Further optional, such as Figures 5-10 As shown, the connecting part includes a limiting clamp strip 21, which is fixed to the front panel body 1. The limiting clamp strip 21 has a limiting cavity extending along its length. A limiting hole extending along its length is provided on one side wall of the limiting clamp strip 21, and the limiting hole communicates with the limiting cavity. A portion of the flexible abutment part is limited within the limiting cavity, and the limiting hole engages with the middle of the flexible abutment part. The other portion of the flexible abutment part extends into the bridge assembly hole 11. By setting the limiting clamp strip, the flexible abutment part can be effectively clamped and limited, facilitating the replacement and maintenance of the flexible abutment part, and also facilitating the installation and fixing of the anti-leakage grain structure.

[0045] To facilitate the fixing of the limiting clamp strip 21 to the front panel body 1, that is, to the mounting plate 12 in the subsequent embodiment, a fixing plate 22 can be provided on the side of the limiting clamp strip 21 away from the flexible abutment part. 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 it and the mounting plate 12. A fixing block 13 can be provided in the gap. The fixing block 13 can be welded to the side 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 part includes a brush 24 or a flexible baffle 25. By providing the brush and flexible baffle, a soft connection can be easily formed in the grain leakage gap, adapting to the spacing changes during operation due to assembly precision issues between the bridge and the thresher. The brush or flexible baffle can be installed and fixed using Phillips head screws. The brush can be made of long PP material woven into a row of brushes.

[0047] The preferred embodiment of the anti-leakage structure 2 differs from the preferred embodiment described above in that, as follows: Figure 11 As shown, in this preferred embodiment, the connecting part 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 abutment part is fixed to the other side wall of the L-shaped plate 23. By providing the L-shaped plate, it is convenient to install and fix it to the front panel body, and it is also convenient to install and fix the flexible abutment part to the L-shaped plate.

[0048] Optionally, the flexible abutment part includes a brush 24 or a flexible baffle 25. By setting the brush and the flexible baffle, a soft connection can be easily formed in the grain leakage gap, which can adapt to the spacing changes of the grain leakage gap between the bridge and the thresher during operation due to assembly precision.

[0049] In this embodiment, in addition to the structure described above, the connecting part can also adopt a flat plate structure or a clamp-like structure, etc. The flexible abutment part can also be made of other flexible materials, in addition to the brush 24 or the flexible baffle 25.

[0050] In this embodiment, the anti-leakage structure 2 is fixed near the bridge assembly hole 11 of the front panel body 1. It can be fixed by relying on the structure of the front panel body 1 itself, or it can be fixed separately on the front panel body 1.

[0051] In this embodiment, the anti-leakage structure 2 preferably adopts a linear structure to adapt and seal the leakage gap 4.

[0052] In this embodiment, the front panel of the thresher has a grain-leakage prevention structure on at least one side of the bridge assembly hole on both sides of the front panel body. When the bridge is assembled into the bridge assembly hole, it can flexibly seal the grain leakage gap between the inner wall of the bridge assembly hole and the outer wall of the bridge. This avoids grain leakage during harvesting due to grain leakage gaps caused by assembly precision issues between the thresher and the bridge. Even if the grain leakage gap between the bridge and the thresher increases during operation, it can still be sealed by the flexible contact of the grain-leakage prevention structure to prevent grain leakage.

[0053] Example 2 This embodiment provides a different structural design for the front panel of a thresher, which still effectively seals the gaps where grain leakage occurs. For example... Figures 14-18 As shown, a front panel of a thresher in this embodiment includes a front panel body 1 and a grain leakage prevention structure 2. The front panel body 1 has a through-hole 11. At least one side of the through-hole 11 is provided with the grain leakage prevention structure 2. At least a part of the grain leakage prevention structure 2 is fixed on the front panel body 1. The grain leakage prevention structure 2 can blow positive pressure airflow into the through-hole 11.

[0054] Specifically, the anti-leakage structure 2 includes a positive pressure fan, which can be installed anywhere on the harvesting machinery, as long as the air outlet can blow positive pressure airflow into the bridge assembly hole 11. The air outlet of the positive pressure fan has a linear structure. By setting up the positive pressure fan, it can blow air into the grain leakage gap, forming an air curtain in the gap. When the external air pressure is greater than the internal air pressure, it can effectively prevent the grains from being discharged.

[0055] One specific solution in 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 and fixedly connected to the middle of the second air duct and communicates with it. The end of the second air duct facing away from the first air duct is the air outlet. The outlet of the fan body 26 is fixedly connected to and communicates 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 to the length of the grain leakage gap, and it is convenient for the fan body to blow air curtains into the grain leakage gap. In this embodiment, the second air duct has a long and narrow structure, which can be adapted to the length of the grain leakage gap. In the following embodiment, the insertion hole 14 on the mounting plate 12 near the bridge assembly hole 11 is adapted to the insertion hole 14. The second air duct can be inserted into the insertion hole 14, or it can be sealed (by setting a sealing strip) and connected to the perimeter of the insertion hole 14 to prevent air leakage.

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

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

[0058] Example 3 Based on Embodiment 1 or Embodiment 2, a preferred embodiment of this embodiment is as follows: Figure 4 , Figure 5 and Figure 10 As shown, at least one side of the bridge assembly hole 11 is provided with an mounting plate 12. The mounting plate 12 has a through-hole 14. The anti-leakage structure 2 is mounted on the mounting plate 12. A portion of the anti-leakage structure 2 can extend into the bridge assembly hole 11 through the through-hole 14, or the air outlet of the anti-leakage structure 2 can be appropriately matched with the through-hole 14. By providing a mounting plate on at least one side of the bridge assembly hole and providing a through-hole on the mounting plate, it is convenient to assemble the anti-leakage structure on the mounting plate and allow it to extend into the bridge assembly hole to seal any gaps in the grain leakage.

[0059] Preferred, such as Figure 4 and Figure 5 As shown, in this embodiment, an installation plate 12 is provided on each of the left and right sides of the bridge assembly hole 11. The installation plate 12 is arranged vertically, so that the anti-leakage grain structure 2 installed on it 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] In this embodiment, the length of the flexible contact part is adapted to the length of the insertion hole 14, and the length of the air outlet of the positive pressure fan is also adapted to the length of the insertion hole, ensuring that the entire length area of ​​the insertion hole 14 has a grain-proof structure.

[0061] In this embodiment, the anti-leakage structure 2 can be directly fixed to the inner side of the mounting plate 12. Since the leakage gap 4 is very narrow, such as... Figures 1-4 As shown, in this embodiment, a plug hole 14 is preferably provided. In this way, only the flexible abutment part that can play the role of preventing grain leakage is placed in the grain leakage gap 4. The assembly is compact and does not affect the assembly between the bridge and the thresher, while also playing the role of preventing grain leakage.

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

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

[0064] Example 5 Based on Embodiment 3 or Embodiment 4, this embodiment provides a preferred arrangement scheme for the grain leakage prevention structure. For example... Figure 9 As shown, the insertion hole includes a first insertion hole and a second insertion hole. The first insertion hole extends vertically, and the second insertion hole is inclined downwards below the first insertion hole. Both the first and second insertion holes are equipped with the anti-leakage structure 24. The second insertion hole is inclined downwards from front to back. By providing two insertion holes, with one vertically arranged and the other inclined downwards, and installing anti-leakage structures in both holes, leakage can be prevented from the sides and bottom of the leakage gap.

[0065] Example 6 Based on Embodiment 2, the anti-leakage structure 2 in this embodiment further includes a flexible part 28. The flexible part 28 is fixed to the front panel body 1 and extends into the bridge assembly hole 11, flexibly abutting against the outer side wall of the bridge 3. By providing the flexible part, the positive pressure fan and the flexible part can be combined, which can form an air curtain in the grain leakage gap and also achieve a soft connection with the side wall of the bridge, further preventing grain leakage.

[0066] Specifically, such as Figure 17 and Figure 18 As shown, the flexible part 28 in this embodiment can be a brush or a flexible baffle. The brush is only used in the brush body of the flexible strip. This combination of positive pressure fan and flexible part 28 results in better grain leakage prevention.

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

[0068] Example 7 Based on any one of the embodiments 1 to 6, this embodiment provides a threshing machine 51, including a threshing machine body and the aforementioned threshing machine front panel, wherein the threshing machine front panel is installed on the front side of the threshing machine body.

[0069] The thresher in this embodiment, by setting a front panel with a grain leakage prevention structure, can effectively and flexibly seal the grain leakage gap between the thresher and the bridge due to assembly precision when they are assembled. Even if the grain leakage gap increases during operation, it can still be sealed to prevent grain from leaking out of the assembly gap.

[0070] Example 8 like Figure 14 As shown, a bridge welding structure in this embodiment includes a welding structure body 31 and a grain leakage prevention structure 2. The grain leakage prevention 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 grain leakage prevention structure 2 is located on the outer side of the connecting plate 32 and can flexibly abut against the inner side of the bridge assembly hole 11 of the thresher 51.

[0071] The anti-leakage structure 2 includes a connecting part and a flexible abutment part. The connecting part is fixed on the connecting plate 32, and the flexible abutment part is installed on the connecting part and located on the outer side of the connecting plate 32. The flexible abutment part includes a brush 24 or a flexible baffle 25. By setting the flexible abutment part, it can flexibly abut against the outer wall of the bridge and effectively seal the grain leakage gap. When the bridge and the thresher are working, even if the grain leakage gap increases, the flexible abutment part can still ensure that the grain leakage gap is continuously sealed. The anti-leakage structure 2 in this embodiment can be the anti-leakage structure 2 described in embodiment 1. The difference from embodiment 1 is that the anti-leakage structure 2 in this embodiment is set on the welded structure body 31 of the bridge, and still seals the grain leakage gap. The specific structural form of the anti-leakage structure 2 will not be described in detail.

[0072] In this embodiment, the bridge welding structure has a grain leakage prevention structure on the connecting plate at the connection 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 precision can be effectively and flexibly sealed. Even if the grain leakage gap increases during operation, it can be adapted to be sealed to prevent grain leakage from the assembly gap.

[0073] Example 9 This embodiment provides a harvester, including a bridge 3 and a thresher 51 of the above embodiment 7. One end of the bridge 3 is inserted into the bridge assembly hole 11. A grain leakage gap 4 is formed between the outer side wall of the bridge 3 and the inner side wall of the bridge assembly hole 11. A part of the anti-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 embodiment 8, except that it does not have a grain leakage prevention structure.

[0075] The harvester in this embodiment, by setting an anti-leakage structure on the thresher, can effectively and flexibly seal the gap between the thresher and the bridge that exists due to assembly precision. Even when the gap widens during operation, it can be adapted to seal it, preventing grain from leaking out of the assembly gap.

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

[0077] The threshing machine body 5 in this embodiment is actually the threshing machine body of embodiment 7. Different names are used for the purpose of differentiation.

[0078] The harvester in this embodiment, by setting an anti-leakage structure on the bridge welded structure, can effectively and flexibly seal the gap between the threshing machine body and the bridge welded structure that exists due to assembly precision. Even when the gap widens during operation, it can be adapted to seal and prevent grain from leaking out of the assembly gap.

[0079] In the description of this invention, it should be understood that the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", 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 invention 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 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0082] In this invention, 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," "over," and "on top" of 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.

[0083] 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.

[0084] 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 front panel for a thresher, characterized in that, The device includes a front panel body and a leak-proof structure. The front panel body has a through-hole for mounting the bridge. At least one side of the bridge mounting hole is provided with a leak-proof structure. At least a part of the leak-proof structure is fixed to the front panel body. A part of the leak-proof structure extends into the bridge mounting hole and can flexibly abut against the outer wall of the bridge or the leak-proof structure can blow positive pressure airflow into the bridge mounting hole. At least one side of the bridge assembly hole is provided with an installation plate. The installation plate has a through insertion hole. The anti-leakage structure is installed on the installation plate. A part of the anti-leakage structure can extend into the bridge assembly hole from the insertion hole or the air outlet of the anti-leakage structure can be matched and connected with the insertion hole.

2. The front panel of a thresher according to claim 1, characterized in that, The insertion hole is an elongated hole, and its projected length on the front panel body is at least 2 / 3 of the vertical width of the bridge assembly hole.

3. The front panel of a thresher according to claim 1, characterized in that, The insertion hole includes a first insertion hole and a second insertion hole. The first insertion hole extends vertically, and the second insertion hole is inclinedly arranged below the first insertion hole in the front-back direction. Both the first insertion hole and the second insertion hole are provided with the anti-leakage structure.

4. A threshing machine front panel according to any one of claims 1 to 3, characterized in that, The anti-leakage structure includes a connecting part and a flexible abutting part. The connecting part is fixed on the front panel body, and the flexible abutting part is installed on the connecting part and can extend into the bridge assembly hole.

5. The front panel of a thresher according to claim 4, characterized in that, The connecting part includes a limiting clamp strip, which is fixed to the front panel body; the limiting clamp strip has a limiting cavity that extends through its own length direction, and a limiting hole extending along its own length direction is opened on one side wall of the limiting clamp strip, which communicates with the limiting cavity. A portion of the flexible abutment is confined within the limiting cavity, the limiting hole is engaged with the middle of the flexible abutment, and another portion of the flexible abutment extends into the bridge assembly hole.

6. The front panel of a thresher according to claim 4, characterized in that, The connecting part includes an L-shaped plate, one side wall of which is fixed to the front panel body, and a portion of the flexible abutment part is fixed to the other side wall of the L-shaped plate.

7. The front panel of a thresher according to claim 4, characterized in that, The flexible contact part includes a brush or a flexible baffle.

8. A threshing machine front panel according to any one of claims 1 to 3, characterized in that, The anti-leakage structure includes a positive pressure fan, and the air outlet of the positive pressure fan has a linear structure.

9. The front panel of a thresher according to claim 8, 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 and fixedly connected to the middle of the second air duct and communicates with it. The end of the second air duct away from the first air duct is the air outlet. The outlet of the fan body is fixedly connected to the side wall of the first air duct and communicates with it.

10. The front panel of a thresher according to claim 8, characterized in that, The anti-leakage structure also includes a flexible part, which is fixed to the front panel body and extends into the bridge assembly hole and can flexibly abut against the outer side wall of the bridge.

11. A threshing machine, characterized in that, The threshing machine includes a threshing machine body and a threshing machine front panel as described in any one of claims 1 to 10, wherein the threshing machine front panel is mounted on the front side of the threshing machine body.

12. A bridge welding structure, characterized in that, It includes a welded structural body and a grain leakage prevention structure. The grain leakage prevention structure is provided on the connecting plate at the connecting end of the welded structural body. At least a portion of the grain leakage prevention structure is located on the outer side of the connecting plate and can flexibly abut against the inner side of the bridge assembly hole of the thresher.

13. The bridge welding structure according to claim 12, characterized in that, The anti-leakage structure includes a connecting part and a flexible abutment part. The connecting part is fixed on the connecting plate, and the flexible abutment part is installed on the connecting part and located on the outer side of the connecting plate. The flexible contact part includes a brush or a flexible baffle.

14. A harvester, characterized in that, The threshing machine includes a bridge and the threshing machine of claim 11, wherein one end of the bridge is inserted into the bridge assembly hole, a grain leakage gap is formed between the outer side wall of the bridge and the inner side wall of the bridge assembly hole, and a portion of the anti-leakage structure is placed in the grain leakage gap.

15. A harvester, characterized in that, The threshing machine body includes the bridge welding structure as described in claim 12 or 13, wherein the connecting end of the bridge welding structure is inserted into the front assembly plate of the threshing machine body, and a grain leakage gap is formed between the outer side wall of the connecting plate and the inner side wall of the bridge assembly hole, and at least a portion of the anti-leakage structure is placed in the grain leakage gap.

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