Intermediate shaft assembly and combine harvester

Abstract

The application relates to the technical field of agricultural machinery, and discloses a middle shaft assembly and a combine harvester, wherein the middle shaft assembly comprises a first mounting seat, a second mounting seat and a middle shaft, the two ends of the middle shaft are rotatably installed on the first mounting seat and the second mounting seat, and the middle shaft assembly further comprises a reinforcing rod assembly which is arranged in parallel with the middle shaft and is used for reinforcing the structure of the middle shaft, and the two ends of the reinforcing rod assembly are detachably connected to the first mounting seat and the second mounting seat. The middle shaft assembly improves assembly strength and reduces maintenance difficulty.

Description

Technical Field

[0001] This application belongs to the field of agricultural machinery technology, specifically relating to an intermediate shaft assembly and a combine harvester using the intermediate shaft assembly. Background Technology

[0002] In the transmission system of a combine harvester, the intermediate shaft, as a core output component, plays a crucial role in the power transmission of the entire machine. When the machine starts, the engine drives the intermediate shaft to rotate, causing the left drive roller and lower intermediate shaft transition wheel to operate, which in turn drives the bridge, screen box, grain elevator, and threshing unit; the right side drives the chopper through the chopper transition wheel. During operation, the left side of the intermediate shaft bears significant tensile forces from the lower left and downwards, while the right side experiences significant tensile forces from the lower right. This stress distribution poses a risk of breakage to the intermediate shaft during long-term operation. Utility Model Content

[0003] The purpose of this application is to provide an intermediate shaft assembly that improves the assembly strength of the intermediate shaft and reduces the difficulty of maintenance.

[0004] To achieve the above objectives, this application provides an intermediate shaft assembly, which includes a first mounting base, a second mounting base, and an intermediate shaft. The two ends of the intermediate shaft are rotatably mounted on the first mounting base and the second mounting base, respectively. The intermediate shaft assembly further includes: A reinforcing rod assembly is arranged parallel to the intermediate shaft and is used to strengthen the intermediate shaft structure. The two ends of the reinforcing rod assembly are detachably connected to the first mounting base and the second mounting base, respectively.

[0005] In some embodiments, the reinforcing rod assembly includes a connecting rod parallel to the intermediate shaft, with end connecting plates detachably connected to the first mounting base and the second mounting base at both ends of the connecting rod.

[0006] In some embodiments, the end connecting plate is welded to the connecting rod.

[0007] In some embodiments, the connecting rod is located directly above the intermediate shaft.

[0008] In some embodiments, the cross-sectional area of ​​the connecting rod is smaller than the cross-sectional area of ​​the intermediate shaft.

[0009] In some embodiments, the connecting rod is a hollow rod.

[0010] In some embodiments, the outer wall surface of the connecting rod is provided with an annular groove.

[0011] In some embodiments, the annular groove is located at the middle of the connecting rod.

[0012] In some embodiments, the end connecting plate is detachably connected to the first mounting base or the second mounting base by fasteners.

[0013] A second aspect of this application provides a combine harvester including the intermediate shaft assembly as described above.

[0014] This utility model includes a first mounting base, a second mounting base, an intermediate shaft, and a reinforcing rod assembly. The reinforcing rod assembly is arranged parallel to the intermediate shaft and serves to strengthen the intermediate shaft structure. The reinforcing rod assembly is detachably connected between the two mounting bases. This design allows the reinforcing rod assembly to effectively distribute the load and improve its bending strength. Even if the reinforcing rod assembly breaks in extreme cases, it can be replaced through the detachable connection structure. Through the above means, this utility model effectively solves the technical problem of the risk of fracture in the intermediate bearing under large tensile forces in the prior art, thereby achieving the technical effects of enhanced assembly strength and reduced maintenance difficulty.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the intermediate shaft assembly of this utility model; Figure 2 This is a structural schematic diagram of the intermediate shaft assembly of this utility model from another perspective; Figure 3 This is a schematic diagram showing the disassembled structure of the intermediate shaft assembly of this utility model.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0019] This utility model proposes an intermediate shaft assembly 100, which can be applied to combine harvesters or other equipment where the output bearing is subjected to large tensile forces.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, in an embodiment of this utility model, the intermediate shaft assembly 100 includes a first mounting base 10, a second mounting base 20, and an intermediate shaft 30. The two ends of the intermediate shaft 30 are rotatably mounted on the first mounting base 10 and the second mounting base 20, respectively. The intermediate shaft assembly 100 also includes a reinforcing rod assembly 40, which is arranged parallel to the intermediate shaft 30 and is used to strengthen the structure of the intermediate shaft 30. The two ends of the reinforcing rod assembly 40 are detachably connected to the first mounting base 10 and the second mounting base 20, respectively.

[0022] Understandably, in order to achieve the technical effect of strengthening the intermediate shaft 30, the specific position of the reinforcing rod assembly 40 is on the opposite side of the force direction of the intermediate shaft 30. That is, when the intermediate shaft 30 is subjected to a downward tensile force, the reinforcing rod assembly 40 is arranged above the intermediate shaft 30, and when the intermediate shaft 30 is subjected to an upward tensile force, the reinforcing rod assembly 40 is arranged below the intermediate shaft 30. The specific arrangement position of the reinforcing rod assembly 40 is related to the force direction of the intermediate shaft 30, but in order to share the load and improve the assembly strength, the reinforcing rod assembly 40 is always located on the opposite side of the force direction of the intermediate shaft 30.

[0023] Let's take the downward tension at both ends of the intermediate shaft 30 as an example for specific analysis. Under the downward pressure, the intermediate shaft 30 deforms, and its two ends bend downward. At this time, the upper surface of the intermediate shaft 30 is stretched, and the lower surface of the intermediate shaft 30 is compressed. In this invention, the reinforcing rod assembly 40 is arranged on the opposite side of the force direction of the intermediate shaft 30, that is, on the side where the upper surface of the intermediate shaft 30 is stretched. This can effectively realize the transmission of force. Specifically, when the two ends of the intermediate shaft 30 are subjected to downward tension and bend downward, part of the force will be transmitted to the reinforcing rod assembly 40 through the connection points on the left and right sides, specifically the first mounting seat 10 and the second mounting seat 20. The reinforcing rod assembly 40 is tightened due to tension. Therefore, the bending stress originally borne by the intermediate shaft 30 is shared by the reinforcing rod assembly 40, the actual load of the intermediate shaft 30 is reduced, thereby preventing breakage.

[0024] In addition to sharing the load, the newly added reinforcing rod assembly 40, through its connection with the first mounting base 10 and the second mounting base 20, also serves as a support, thereby enhancing the assembly strength of the intermediate shaft 30.

[0025] Understandably, the fracture strength of the reinforcing rod assembly 40 is lower than that of the intermediate shaft 30. This can be achieved by selecting appropriate materials or designing a reasonable structure. In other words, in the event of unforeseen extreme situations, the reinforcing rod assembly 40 will break first to protect the intermediate shaft 30. Furthermore, the reinforcing rod assembly 40 is fixed in a detachable manner, which is faster and simpler than disassembling the transmission system of the intermediate shaft 30, and has lower maintenance costs.

[0026] like Figure 2 As shown, the reinforcing rod assembly 40 includes a connecting rod 41 parallel to the intermediate shaft 30, and the two ends of the connecting rod 41 are provided with end connecting plates 42 that are detachably connected to the first mounting base 10 and the second mounting base 20.

[0027] In one embodiment of this utility model, such as Figure 2 As shown, the end connecting plate 42 adopts an L-shaped angle plate, including a first plate 421 and a second plate 422 arranged vertically. The end face of the connecting rod 41 is fixedly connected to the first plate 421, and the upper surface of the connecting rod 41 is fixedly connected to the second plate 422. The first plate 421 is detachably connected to the first mounting base 10 or the second mounting base 20. To reduce stress concentration, the connection between the first plate 421 and the second plate 422 is achieved by a rounded transition. The connecting rod 41 is fixed to the mounting base by the end connecting plate 42, which can further improve the connection strength of the connecting rod 41. In addition, the intermediate shaft 30 and the mounting base are rotated through a bearing seat. The first plate 421 is provided with a relief arc groove to avoid the installation position of the bearing seat.

[0028] The specific shape of the end connecting plate 42 is not limited to the L-shaped corner plate mentioned above, and its quantity can also be flexibly adjusted according to actual needs, which is not limited here.

[0029] The connecting rod 41 is fixed to the two end connecting plates 42 by welding. Those skilled in the art will understand that this application is not limited to the welding described above; threaded fastener connections are also possible. Other structural forms that can enhance the assembly strength of the reinforcing rod assembly 40 and thus ensure effective force transmission should also fall within the scope of protection of this application.

[0030] like Figure 3As shown, during the assembly of the reinforcing rod assembly 40, shims 50 are provided between the end connecting plate 42 and the first mounting base 10, and between the end connecting plate 42 and the second mounting base 20. The shims 50 can compensate for errors; that is, even if there is a large tolerance at the connection between the end connecting plate 42 and the mounting base during assembly, the shims 50 can compensate for it. Installers can tighten the reinforcing rod assembly 40 by selecting shims 50 of different thicknesses or increasing or decreasing the number of shims 50, thereby reducing manufacturing precision and costs. Furthermore, the shims 50 can reduce wear; due to their placement, direct contact between the end connecting plate 42 and the mounting base is avoided, thus providing protection. Replacing the shims 50 when damaged is also relatively simple.

[0031] On the left side of the intermediate shaft 30 of the combine harvester, i.e., the side where the first mounting base 10 is located, a left-side pulley connects to the threshing chamber gearbox and the lower intermediate transition pulley. The threshing chamber gearbox drives the threshing chamber, and the lower intermediate transition pulley, in turn, drives the bridge, grain elevator, waste elevator, and sieve box. On the right side of the intermediate shaft 30 of the combine harvester, i.e., the side where the second mounting base 20 is located, a right-side pulley connects to the shredder transition pulley, thereby driving the shredder. Therefore, the force on both ends of the intermediate shaft 30 of the combine harvester is a downward pulling force. When this utility model is applied to a combine harvester, such as... Figure 2 As shown, the connecting rod 41 is located directly above the intermediate shaft 30. When applied to the output shaft of other devices, the position of the connecting rod 41 can be flexibly adjusted according to the direction of the force.

[0032] The connecting rod 41 can have various shapes, such as cylindrical, prismatic, or other shapes. To ensure that the breaking strength of the connecting rod 41 is lower than that of the intermediate shaft 30, the cross-sectional area of ​​the connecting rod 41 is smaller than that of the intermediate shaft 30 during the dimensional design. When selecting materials, the connecting rod 41 should be made of a material with slightly lower strength than that of the intermediate shaft 30. For example, if the connecting rod 41 and the intermediate shaft 30 are made of the same material, then the cross-sectional area of ​​the connecting rod 41 is smaller than that of the intermediate shaft 30. Alternatively, if the connecting rod 41 and the intermediate shaft 30 have the same cross-sectional area, then the connecting rod 41 should be made of a material with slightly lower strength than that of the intermediate shaft 30. Of course, the connecting rod 41 can also be made of a material with lower strength while having a smaller cross-sectional area. Those skilled in the art can make flexible choices according to actual needs, and no limitations are imposed here.

[0033] In one embodiment of this utility model, the connecting rod 41 is a hollow rod. For the same weight, a hollow rod has stronger bending resistance than a solid rod. Therefore, designing the connecting rod 41 as a hollow structure can reduce cost and weight while maintaining the same bending resistance.

[0034] In one embodiment of this utility model, the outer wall surface of the connecting rod 41 is provided with an annular groove (not shown in the figure).

[0035] Understandably, the annular groove is located at a slightly weaker point on the connecting rod 41. This groove allows for stress concentration, ensuring that even if the connecting rod 41 breaks under extreme conditions, the breakage will occur at a predetermined location. The annular groove is positioned in the middle of the connecting rod 41, thus preventing the fracture surface from impacting or damaging the mounting seats at both ends. The annular groove is U-shaped, and its curved surface allows for a smooth transition, making the breakage location more precise. When the connecting rod 41 breaks, simply remove the end connecting plates 42 from the mounting seats on both sides and replace them with a new reinforcing rod assembly 40; the repair process is relatively simple.

[0036] In embodiments of this utility model, the end connecting plate 42 is detachably connected to the first mounting base 10 or the second mounting base 20 by fasteners. Those skilled in the art will understand that fasteners include, but are not limited to, threaded fasteners, and other structural forms capable of achieving detachable connections should also fall within the scope of protection of this application.

[0037] Both the first mounting base 10 and the second mounting base 20 are provided with bearing seats for rotating with the intermediate shaft 30. The four corners of the bearing seat are provided with mounting holes and are fixed to the mounting base by four threaded fasteners. In order to facilitate assembly and reduce costs, the two assembly holes opened on the end connecting plate 42 are aligned with the two mounting holes on the upper part of the bearing seat. Therefore, the reinforcement rod assembly 40 does not need to be fixed with additional fasteners.

[0038] In addition, such as Figure 3 As shown, the gasket 50 has two openings corresponding to the mounting holes. The openings of the openings face downwards. When the gasket needs to be replaced, simply loosen the threaded fasteners and move the gasket 50 upwards so that the openings disengage from the threaded fasteners to remove the gasket 50.

[0039] This utility model also proposes a combine harvester (not shown in the figure), which includes an intermediate shaft assembly 100. The specific structure of the intermediate shaft assembly 100 is as described in the above embodiments. Since this combine harvester adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0040] In the description of this application, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly 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 mechanical connection, an electrical connection, or a connection that allows communication between components; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0043] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An intermediate shaft assembly, comprising a first mounting base (10), a second mounting base (20), and an intermediate shaft (30), wherein both ends of the intermediate shaft (30) are rotatably mounted on the first mounting base (10) and the second mounting base (20), characterized in that, The intermediate shaft assembly also includes: A reinforcing rod assembly (40) is arranged parallel to the intermediate shaft (30) and is used to reinforce the structure of the intermediate shaft (30). The two ends of the reinforcing rod assembly (40) are detachably connected to the first mounting base (10) and the second mounting base (20), respectively.

2. The intermediate shaft assembly according to claim 1, characterized in that, The reinforcing rod assembly (40) includes a connecting rod (41) parallel to the intermediate shaft (30), and the two ends of the connecting rod (41) are provided with end connecting plates (42) that are detachably connected to the first mounting base (10) and the second mounting base (20).

3. The intermediate shaft assembly according to claim 2, characterized in that, The end connecting plate (42) is welded to the connecting rod (41).

4. The intermediate shaft assembly according to claim 2, characterized in that, The connecting rod (41) is located directly above the intermediate shaft (30).

5. The intermediate shaft assembly according to claim 2, characterized in that, The cross-sectional area of ​​the connecting rod (41) is smaller than that of the intermediate shaft (30).

6. The intermediate shaft assembly according to claim 2, characterized in that, The connecting rod (41) is a hollow rod.

7. The intermediate shaft assembly according to claim 2, characterized in that, The outer wall surface of the connecting rod (41) is provided with an annular groove.

8. The intermediate shaft assembly according to claim 7, characterized in that, The annular groove is located in the middle of the connecting rod (41).

9. The intermediate shaft assembly according to any one of claims 2 to 8, characterized in that, The end connecting plate (42) is detachably connected to the first mounting base (10) or the second mounting base (20) by fasteners.

10. A combine harvester, characterized in that, The combine harvester includes the intermediate shaft assembly according to any one of claims 1 to 9.

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