Threshing and cleaning transmission system and combine harvester

Abstract

A threshing and cleaning transmission system, comprising an engine output shaft (1), a fan shaft (2), a first roller (3), and a second roller (4). The engine output shaft (1) is in transmission connection with a first end of the fan shaft (2), a second end of the fan shaft (2) is in transmission connection with a second end of the first roller (3), and a first end of the first roller (3) is in transmission connection with a first end of the second roller (4). The fan shaft (2) of an existing cleaning fan serves as a main transmission shaft, the fan shaft (2) and the engine have appropriate space and an appropriate center distance therebetween, and power may be directly transmitted to the first roller (3) by means of the fan shaft (2), thereby shortening the transmission route and reducing the number of the transmission shafts. The transmission components are arranged on two sides of threshing and cleaning equipment, achieving a reasonable transmission arrangement and a compact structure without occupying the space for other components. Further disclosed is a combine harvester comprising the threshing and cleaning transmission system.

Description

Threshing, cleaning and transmission system and combine harvester Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to a threshing, cleaning and transmission system and a combine harvester. Background Art

[0002] Combine harvesters are used to harvest, thresh and clean crops. Their transmission system usually has a separate drive shaft. The engine first transmits power to the separate drive shaft, which is then used as the main drive shaft for the threshing and cleaning equipment (including the threshing drum, cleaning fan and screen box, etc.) to provide power for the threshing drum.

[0003] Especially for transverse-axis flow threshing and cleaning equipment, usually all the transmission wheels are arranged on the same side of the threshing and cleaning equipment, so that the transmission system occupies a large space, has a non-compact structure, is costly, and has a long transmission route.

[0004] Utility Model Content

[0005] The technical problem to be solved by the utility model is how to arrange the transmission system of threshing and cleaning equipment to make its structure compact.

[0006] The technical solution of the utility model for solving the above technical problems is as follows: a threshing and cleaning transmission system includes an engine output shaft, a fan shaft, a first roller and a second roller, the engine output shaft is transmission-connected to the first end of the fan shaft, the second end of the fan shaft is transmission-connected to the second end of the first roller, and the first end of the first roller is transmission-connected to the first end of the second roller.

[0007] The beneficial effects of the present invention are as follows: the fan shaft of an existing cleaning fan is used as the main transmission shaft, and the fan shaft and the engine have an appropriate space and a suitable center distance between the two. Power can be directly transmitted to the first roller via the fan shaft, shortening the transmission route and reducing the number of transmission shafts. The transmission components are arranged on both sides of the threshing and cleaning equipment, and the transmission layout is reasonable, does not occupy the space of other components, and has a compact structure.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, it also includes an intermediate shaft, the second end of the fan shaft is transmission-connected to the intermediate shaft, and the intermediate shaft is transmission-connected to the second end of the first roller.

[0010] The beneficial effect of adopting the above further solution is: an intermediate shaft is provided, and the fan shaft is transmitted to the first roller via the intermediate shaft, thereby avoiding the transmission belt or transmission chain between the fan shaft and the first roller being too long, thereby ensuring transmission reliability.

[0011] Furthermore, the first roller is located in front of the second roller, and the axes of the first roller and the second roller are both arranged in the left-right direction.

[0012] Furthermore, the fan shaft is located below the first roller, and the engine output shaft is located in front of the fan shaft.

[0013] Furthermore, the first roller is also drivingly connected to the bridge input shaft.

[0014] The beneficial effects of adopting the above further solution are: power is provided to the bridge input shaft through the first roller, the transmission structure is reasonably arranged and compact.

[0015] Furthermore, the bridge input shaft is located in front of the first roller.

[0016] Furthermore, it also includes a chopper shaft, and the second end of the second roller is drivingly connected to the chopper shaft.

[0017] The beneficial effect of adopting the above further solution is that, for the threshing and cleaning equipment provided with a chopper, the second roller is also driven by the chopper shaft to provide power for the chopper.

[0018] Furthermore, the first roller and the second roller are equal in length.

[0019] The beneficial effect of adopting this further solution is that, in transverse-axis flow threshing and cleaning equipment, the front roller is typically shorter and the rear roller is longer. Therefore, the two rollers are aligned at only one end, making it difficult to achieve bilateral transmission. To achieve bilateral transmission, the central axis of the shorter roller would need to be lengthened, which would increase the bending moment on the axis and reduce structural stability. In this solution, the first and second rollers are of equal length, making it easier to arrange a drive belt or chain at both ends of the rollers, and the structure is more compact.

[0020] The utility model also provides a combine harvester, comprising a frame and the threshing and cleaning transmission system, wherein the fan shaft, the first roller and the second roller are all rotatably mounted on the frame.

[0021] Furthermore, the combine harvester also includes a power mechanism, which is transmission-connected to the engine output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a transmission structure diagram of a combine harvester according to the present invention;

[0023] FIG2 is a schematic diagram of a threshing and cleaning transmission system of the combine harvester in FIG1 ;

[0024] FIG3 is a transmission structure diagram of the left side of the combine harvester of the present invention;

[0025] FIG4 is a transmission structure diagram of the right side of the combine harvester of the present invention;

[0026] FIG5 is a schematic diagram of a transmission structure of the prior art.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. Engine output shaft; 2. Fan shaft; 3. First roller; 4. Second roller; 5. Intermediate shaft; 6. Bridge input shaft; 7. Chopper shaft; 100. Drive shaft; 200. Grain elevator; 300. Miscellaneous elevator; 400. Exhaust system. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] As shown in Figure 5, the transmission system of a conventional horizontal-axis flow harvester utilizes a single drive shaft 100, with the tensioner omitted. The engine output shaft 1 first transmits power to the drive shaft 100, which then serves as the main drive shaft for the threshing and cleaning equipment, providing power to the threshing drum, chopper shaft 7, and screen box. The areas outlined by the double-dotted dashed lines in the figure represent the front and side maintenance areas of the threshing and cleaning equipment. The arrangement of the drive shaft 100 and the collective side drive wheels obscures these two maintenance areas, limiting maintenance space. Furthermore, the transmission system suffers from a long belt length, which occupies a large space and results in significant power loss.

[0031] In the description of this embodiment, the transmission connection can be a chain drive connection, a belt drive connection, or a gear drive connection. Specifically, a chain drive connection is as follows: sprockets are fixed to the shafts of the two chain drive connections, and the drive chain is sleeved on the two sprockets to achieve transmission. Specifically, a belt drive connection is as follows: pulleys are fixed to the shafts of the two belt drive connections, and the drive belt is sleeved on the two pulleys to achieve transmission. Specifically, a gear drive is as follows: gears are fixed to the shafts of the two gear drives, and the gears on the two shafts are directly meshed for transmission, or the gears on the two shafts are meshed for transmission through at least one intermediate gear.

[0032] In the description of this embodiment, the "first end" of the shaft refers to the right end relative to the forward direction of the combine harvester, and the "second end" of the shaft refers to the left end relative to the forward direction of the combine harvester. Alternatively, the "first end" of the shaft refers to the left end relative to the forward direction of the combine harvester, and the "second end" of the shaft refers to the right end relative to the forward direction of the combine harvester.

[0033] As shown in Figures 1 to 4, this embodiment provides a threshing and cleaning transmission system, including an engine output shaft 1, a fan shaft 2, a first roller 3 and a second roller 4, the engine output shaft 1 is transmission-connected to the first end of the fan shaft 2, the second end of the fan shaft 2 is transmission-connected to the second end of the first roller 3, and the first end of the first roller 3 is transmission-connected to the first end of the second roller 4.

[0034] The fan shaft 2 of the existing cleaning fan is used as the main transmission shaft. The fan shaft 2 has an appropriate space with the engine and a suitable center distance between the two. Power can be directly transmitted to the first roller 3 through the fan shaft 2, shortening the transmission route and reducing the number of transmission shafts. The transmission components are arranged on both sides of the threshing and cleaning equipment, making the transmission layout reasonable, not occupying space for other components, and having a compact structure.

[0035] As shown in the double-dotted area in FIG3 , the front maintenance port and the side maintenance area of ​​the threshing and cleaning equipment are not blocked, the space is large, and the maintenance convenience is good.

[0036] Because the right side of the machine body is equipped with the grain elevator 200, the debris elevator 300, and the exhaust system 400, placing all the transmission components on the left side of the machine body would not save space on the right side of the machine body, but would increase space on the left side. This solution places part of the transmission components on the right side of the machine body, which preserves the space on the right side and saves space on the left side, thus making the overall structure more compact.

[0037] On the basis of the above technical solution, an intermediate shaft 5 is further included. The second end of the fan shaft 2 is transmission-connected to the intermediate shaft 5 , and the intermediate shaft 5 is transmission-connected to the second end of the first drum 3 .

[0038] In this solution, an intermediate shaft 5 is provided, through which the fan shaft 2 is driven by the first roller 3. This avoids excessively long transmission belts or chains between the fan shaft 2 and the first roller 3, thereby ensuring transmission reliability. Specifically, a shorter intermediate shaft 5 is simply installed on the side wall of the machine body to support the pulleys. Since the intermediate shaft 5 is not essential, it can be eliminated. To maintain the same transmission ratio, the diameter of the output pulley of the fan shaft 2 can be appropriately reduced, while the diameter of the input pulley of the first roller 3 can be appropriately increased.

[0039] Specifically, the intermediate shaft 5 is located above the fan shaft 2 and below the first roller 3 .

[0040] On the basis of any of the above solutions, the first roller 3 is located in front of the second roller 4, and the axes of the first roller 3 and the second roller 4 are both arranged in the left-right direction.

[0041] On the basis of any of the above solutions, the fan shaft 2 is located below the first roller 3 , and the engine output shaft 1 is located in front of the fan shaft 2 .

[0042] On the basis of any of the above solutions, the first roller 3 is further transmission-connected to the bridge input shaft 6 .

[0043] The first roller 3 provides power to the bridge input shaft 6, and the transmission structure has a reasonable layout and a compact structure.

[0044] Based on any of the above solutions, the bridge input shaft 6 is located in front of the first roller 3 .

[0045] On the basis of any of the above solutions, the threshing and cleaning transmission system further includes a chopper shaft 7 , and the second end of the second roller 4 is transmission-connected to the chopper shaft 7 .

[0046] For the threshing and cleaning equipment provided with a chopper, the second roller 4 is also driven by the chopper shaft 7 to provide power for the chopper.

[0047] Based on any of the above solutions, the first roller 3 and the second roller 4 are equal in length.

[0048] Transverse-axis flow threshing and cleaning equipment typically has a shorter front roller and a longer rear roller. Therefore, the two rollers are aligned at only one end, making it difficult to achieve bilateral transmission. To achieve bilateral transmission, the central axis of the shorter roller would need to be lengthened, which would increase the bending moment on the axis and reduce structural stability. In this solution, the first roller 3 and the second roller 4 are of equal length, making it easier to arrange a transmission belt or chain at both ends of the rollers, and achieving a compact structure.

[0049] As shown in FIG1 , this embodiment further provides a combine harvester, comprising a frame and the threshing and cleaning transmission system, wherein the fan shaft 2 , the first roller 3 and the second roller 4 are all rotatably mounted on the frame.

[0050] Specifically, a screening concave is fixed to the frame, and both the first roller 3 and the second roller 4 are rotatably positioned on the screening concave. The combine harvester's screen box is fixed below the screening concave, and the cleaning fan is installed within the screen box. The fan shaft 2 is the power shaft within the cleaning fan.

[0051] Based on any of the above solutions, the combine harvester further includes a power mechanism, which is transmission-connected to the engine output shaft 1 .

[0052] Specifically, the power mechanism is an engine, and the main shaft of the engine is transmission-connected to the engine output shaft 1. Optionally, the main shaft of the engine and the engine output shaft 1 are coaxially fixed or integrally formed, or the main shaft of the engine and the engine output shaft 1 are transmission-connected via an intermediate transmission component.

[0053] Furthermore, the combine harvester also includes a walking mechanism, which is installed at the lower part of the frame and is a crawler-type walking component.

[0054] In one specific example, on the right side of the frame, the engine output shaft 1 transmits power to the first end of the fan shaft 2. Subsequently, on the left side of the frame, the second end of the fan shaft 2 transmits power to the intermediate shaft 5, which transmits power to the second end of the first roller 3. Then, on the right side of the frame, the first end of the first roller 3 transmits power to the first end of the second roller 4. Furthermore, for models equipped with a chopper, the second end of the second roller 4 transmits power to the chopper shaft 7 on the left side of the frame.

[0055] In the description of the present invention, it should be noted that the terms "front", "rear", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0056] 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 specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] 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 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.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means 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 expressions 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 the features of different embodiments or examples without contradiction.

[0059] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A threshing and cleaning transmission system, comprising an engine output shaft (1), a fan shaft (2), a first roller (3) and a second roller (4), characterized in that: The engine output shaft (1) is transmission-connected to the first end of the fan shaft (2), the second end of the fan shaft (2) is transmission-connected to the second end of the first roller (3), and the first end of the first roller (3) is transmission-connected to the first end of the second roller (4).

2. A threshing and cleaning transmission system according to claim 1, characterized in that: It also comprises an intermediate shaft (5), the second end of the fan shaft (2) is drivingly connected to the intermediate shaft (5), and the intermediate shaft (5) is drivingly connected to the second end of the first roller (3).

3. A threshing and cleaning transmission system according to claim 1, characterized in that: The first roller (3) is located in front of the second roller (4), and the axes of the first roller (3) and the second roller (4) are both arranged in the left-right direction.

4. A threshing and cleaning transmission system according to claim 3, characterized in that: The fan shaft (2) is located below the first roller (3), and the engine output shaft (1) is located in front of the fan shaft (2).

5. A threshing and cleaning transmission system according to claim 3, characterized in that: The first roller (3) is also drivingly connected to the bridge input shaft (6).

6. A threshing and cleaning transmission system according to claim 5, characterized in that: The bridge input shaft (6) is located in front of the first roller (3).

7. A threshing and cleaning transmission system according to claim 3, characterized in that: It also comprises a chopper shaft (7), and the second end of the second roller (4) is drivingly connected to the chopper shaft (7).

8. A threshing and cleaning transmission system according to any one of claims 1 to 7, characterized in that: The first roller (3) and the second roller (4) are of equal length.

9. A combine harvester, characterized in that: It comprises a frame and a threshing and cleaning transmission system as claimed in any one of claims 1 to 8, wherein the fan shaft (2), the first roller (3) and the second roller (4) are all rotatably mounted on the frame.

10. A combine harvester according to claim 9, characterized in that: The combine harvester also comprises a power mechanism, which is drivingly connected to the engine output shaft (1).

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