Agricultural machinery roll shaft

Abstract

The utility model provides an agricultural machinery roll shaft which comprises a roller which is of a hollow cylindrical structure, and the hollow structure of the roller serves as a shaft hole for installing a shaft head. The two shaft heads are installed in the shaft holes in the two ends of the roller and comprise shaft rods and umbrella-shaped parts, the two ends of each shaft rod are a shaft end and a supporting end, the umbrella-shaped parts are located on the portions, between the shaft ends and the supporting ends, of the shaft rods, the umbrella-shaped parts are round, the diameters of the umbrella-shaped parts are matched with the diameters of the shaft holes, and the umbrella-shaped parts are connected into the shaft holes in a welded mode; the shaft end is positioned on the outer side of the shaft hole of the roll shaft, and the supporting end is positioned in the shaft hole; and the two supporting rings are correspondingly arranged at the shaft end of the shaft head and the inner wall of the shaft hole respectively. According to the agricultural mechanical roller shaft, through the connecting structure design of the shaft heads and the supporting rings of the shaft heads, after the agricultural mechanical roller shaft is fixedly connected with a roller, the overall mechanical performance of the roller shaft is greatly improved, the anti-torsion and anti-bending effects can be achieved, and the coaxiality is better.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to an agricultural machinery roller shaft. Background Art

[0002] Existing agricultural machinery such as straw balers, straw strip machines, and rotary tillers all use a roller shaft structure as the carrier of their working parts, and drive the working parts of the agricultural machinery to work through the rotation of the roller shaft.

[0003] Since the roller shaft bears a large torsional force during the working process of the agricultural machinery, the mechanical properties such as the structural strength of the roller shaft directly determine the service life of the roller shaft. If the structural design of the roller shaft is unreasonable, it may cause the fracture of the roller shaft head or the fracture of the roller surface. Usually, the roller structure includes an axial multi-plate shaft head structure, a shrink-fit shaft head structure, a single-plate shaft head structure, etc. Unreasonable structural design is a main reason for the fracture of the roller shaft head. At the same time, during the processing and manufacturing of the shaft head of the roller shaft, due to the stress concentration at the welding joint and the inability to release it well, or the poor coaxiality during the processing and manufacturing of the roller shaft, it is also easy to cause serious wear or fracture of the shaft head during the use of the roller shaft.

[0004] It can be seen that agricultural machinery with a roller shaft structure is prone to problems such as wear, rupture, and falling of the shaft head during use, which are also the technical problems to be solved in this application. Summary of the Utility Model

[0005] The technical problem to be solved by the embodiments of the utility model is to provide an agricultural machinery roller shaft to solve the problems that the roller shaft structure of the existing agricultural machinery is unreasonable, resulting in easy wear, rupture, and falling of the shaft head structure.

[0006] To solve the above technical problem, the utility model provides an agricultural machinery roller shaft, including:

[0007] A roller barrel, which is in a hollow cylindrical structure, and the hollow structure of the roller barrel serves as a shaft hole for installing the shaft head;

[0008] Shaft heads, there are two of them, installed in the shaft holes at both ends of the roller barrel. The shaft heads adopt an integral structure, including a shaft rod and an umbrella-shaped part. The two ends of the shaft rod are the shaft end and the support end. Among them, the umbrella-shaped part is located on the shaft rod between the shaft end and the support end. The umbrella-shaped part is circular and its diameter is adapted to the diameter of the shaft hole. The umbrella-shaped part is connected to the shaft hole by welding, and the shaft end is located outside the shaft hole of the roller shaft, and the support end is located in the shaft hole;

[0009] Support rings, there are two of them, respectively arranged corresponding to the shaft end of the shaft head and the inner wall of the shaft hole. Among them, the middle hole of the support ring is connected to the support end of the shaft head, and the edge of the support ring supports on the inner wall of the shaft hole.

[0010] The middle hole of the support ring is fixedly connected to the support end of the shaft head by welding.

[0011] The edge of the support ring is welded to the shaft hole of the roller shaft by welding.

[0012] The root of the umbrella-shaped part is integrally connected to the shaft rod by an annular seat with a triangular cross-section.

[0013] The umbrella-shaped part is formed on the shaft rod by forging.

[0014] The shaft head is made of 40Cr alloy structural steel.

[0015] A replaceable wear-resistant ring is installed on the shaft end of the shaft head.

[0016] The distance between the shaft end and the umbrella-shaped part is less than the distance between the support end and the umbrella-shaped part, so that the shaft head can withstand greater torsion.

[0017] A stepped mounting structure is provided on the shaft rod at the shaft end.

[0018] An application of a roller shaft of an agricultural machine includes the above-mentioned roller shaft of the agricultural machine, and is applied to the roller shafts of a straw baler, a straw stacking machine, and a rotary tiller.

[0019] The roller shaft of the agricultural machine provided by the present utility model, through the connection structure design of the shaft head and its support ring, after being fixedly connected to the roller barrel, greatly improves the overall mechanical performance of the roller shaft, can play the role of anti-torsion and anti-bending, and has better coaxiality; due to the use of 40 chromium material, its wear resistance is also better and the hardness is higher, and it can perfectly replace the existing manganese steel material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the roller shaft of the agricultural machine according to an embodiment of the present utility model.

[0021] Figure 2 It is a schematic structural diagram of the roller shaft of the agricultural machine according to an embodiment of the present utility model.

[0022] Figure 3 It is a schematic structural diagram of the shaft head according to an embodiment of the present utility model.

[0023] In the figure: 1 roller barrel; 2 shaft head; 3 support ring;

[0024] 21 shaft rod; 22 umbrella-shaped part; 211 shaft end; 212 support end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] As Figures 1-3 shown, the present utility model provides an agricultural machinery roller shaft, including:

[0029] The roller 1 is in a hollow cylindrical structure, and the hollow structure of the roller 1 serves as the shaft hole for installing the shaft head 2.

[0030] There are two shaft heads 2, which are installed in the shaft holes at both ends of the roller 1. The shaft head 2 adopts an integral structure and includes a shaft rod 21 and an umbrella-shaped part 22. The two ends of the shaft rod 21 are a shaft end 211 and a support end 212. The umbrella-shaped part 22 is located on the shaft rod 21 between the shaft end 211 and the support end 212. The umbrella-shaped part 22 is circular and its diameter is adapted to the diameter of the shaft hole. The umbrella-shaped part 22 is connected to the shaft hole by welding, and the shaft end 211 is located outside the shaft hole of the roller shaft 1, and the support end 212 is located in the shaft hole.

[0031] There are two support rings 3, which are respectively arranged corresponding to the shaft ends of the shaft head 2 and the inner wall of the shaft hole. The middle hole of the support ring 3 is connected to the support end 212 of the shaft head 2, and the edge of the support ring 3 supports on the inner wall of the shaft hole.

[0032] For the agricultural machinery roller shaft provided by the utility model, the shaft head is connected to the roller by means of insertion, supported in the roller by the support end 212 and the support ring 3, and at the same time, the umbrella-shaped part 22 is hermetically connected to the end of the shaft hole of the roller 1, thus forming two-point stable support; since the shaft head 2 adopts an integral structure, the coaxiality of the shaft head 2 itself is better, and it also ensures the coaxiality when the shaft head 2 is welded to the roller.

[0033] For the agricultural machinery roller shaft provided by the utility model, through the connection structure design of the shaft head and its support ring, after being fixedly connected to the roller, the overall mechanical performance of the roller shaft is greatly improved, which can play the role of resisting torsion and bending, and the coaxiality is also better; since 40Cr material is adopted, its wear resistance is better and the hardness is higher, which can perfectly replace the existing manganese steel material.

[0034] As Figure 2 shown, the middle hole of the support ring 3 is fixedly connected to the support end of the shaft head by welding.

[0035] As Figure 1 shown, the edge of the support ring 3 is welded to the shaft hole of the roller shaft by welding.

[0036] Figure 1 and Figure 2 shown, the welding positions of the support ring 3 between the roller shaft 1 and the shaft head 2 are different. Since the support ring 3 is located inside the connection of the roller shaft 1 and the shaft head 2 and the support ring 3 itself is not exposed, the fixation and installation of the support ring 3 are extremely important. Obviously, the support ring 3 cannot be welded to both the roller shaft 1 and the shaft head 2 at the same time (because there is no welding space), so in the actual operation process, the support ring 3 can be welded to only one of the roller shaft 1 and the shaft head 2.

[0037] The root of the umbrella-shaped part 22 is integrally connected to the shaft rod by an annular seat with a triangular cross-section.

[0038] The umbrella-shaped part 22 is formed on the shaft rod 21 by forging. The forging method can ensure that there is a continuous crystal phase structure between the umbrella-shaped part 22 and the shaft rod 21, so that the shaft head 2 after forging has good mechanical properties.

[0039] The shaft head is made of 40Cr alloy structural steel. 40Cr alloy structural steel has strong hardness and wear resistance and can maintain good mechanical properties after forging.

[0040] A replaceable wear-resistant ring is installed on the shaft end 211 of the shaft head 2. The wear-resistant ring is detachably connected to the shaft head 2, thus avoiding direct wear on the shaft head and improving the service life of the roller shaft.

[0041] The distance between the shaft end 211 and the umbrella-shaped part 22 is less than the distance between the support end 212 and the umbrella-shaped part 22, so that the shaft head can withstand greater torque. Since the shaft end, the umbrella-shaped part, and the support end 212 are the three main force-bearing parts on the shaft head, this makes the umbrella-shaped part 22 serve as a support structure. And the greater distance between the support end 212 and the umbrella-shaped part results in less force borne by the support end 212, thus avoiding damage to the roller and reducing the deformation of the roller.

[0042] A stepped mounting structure is provided on the shaft rod of the shaft end, and the stepped mounting structure can be used to mount structures such as bearings or wear-resistant rings.

[0043] The present utility model also provides an application of an agricultural machinery roller shaft, including the above-mentioned agricultural machinery roller shaft, which is applied to the roller shafts of straw balers, straw striping machines, and rotary tillers. For example, it can be applied to the roller shaft 31 of the equipment with the patent application number 2024200902283 and the name of a straw processing device applied by the applicant in 2024.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0045] The above-described embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. An agricultural machinery roller, characterized in that: include: The roller is a hollow cylindrical structure, and the hollow structure of the roller serves as an axial hole for installing the shaft head; There are two shaft heads, which are installed in the shaft holes at both ends of the roller. The shaft heads adopt an integral structure, including a shaft rod and an umbrella-shaped part. The two ends of the shaft rod are shaft ends and support ends, wherein the umbrella-shaped part is located on the shaft rod between the shaft end and the support end. The umbrella-shaped part is circular and its diameter is adapted to the diameter of the shaft hole. The umbrella-shaped part is connected to the shaft hole by welding, and the shaft end is located outside the shaft hole of the roller shaft, and the support end is located in the shaft hole. There are two support rings, which are respectively arranged on the shaft end of the shaft head and the inner wall of the shaft hole, wherein the middle hole of the support ring is connected to the support end of the shaft head, and the edge of the support ring is supported on the inner wall of the shaft hole.

2. The agricultural machinery roller according to claim 1, characterized in that: The center hole of the support ring is fixedly connected to the support end of the shaft head by welding.

3. The agricultural machinery roller according to claim 1, characterized in that: The edge of the support ring is connected to the shaft hole of the roller shaft by welding.

4. The agricultural machinery roller according to claim 1, characterized in that: The root of the umbrella-shaped portion is connected integrally with the shaft rod by adopting an annular seat with a triangular cross section.

5. The agricultural machinery roller according to claim 1, characterized in that: The umbrella-shaped portion is formed on the shaft rod by forging.

6. The agricultural machinery roller according to claim 1, characterized in that: The shaft head is made of 40Cr alloy structural steel.

7. The agricultural machinery roller according to claim 1, characterized in that: A replaceable wear-resistant ring is installed on the shaft end of the shaft head.

8. The agricultural machinery roller according to claim 1, characterized in that: The distance between the shaft end and the umbrella-shaped portion is smaller than the distance between the support end and the umbrella-shaped portion, so that the shaft head can withstand a larger torque.

9. The agricultural machinery roller according to claim 1, characterized in that: A step installation structure is arranged on the shaft rod at the shaft end.

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