A drum apparatus for a bale press

Abstract

The utility model belongs to the field of agricultural machinery technology discloses a kind of roller device of round bale bundling machine, including double sprocket, single sprocket and cylinder shaft integrated assembly, wherein, double sprocket and single sprocket are fixedly installed at the both ends of cylinder shaft integrated assembly respectively, first bearing is rotatably installed at the position close to double sprocket of one end of cylinder shaft integrated assembly, second bearing is rotatably installed at the position close to single sprocket of other end of cylinder shaft integrated assembly;The utility model whole structure is simple, can simplify installation process when installing the roller of bundling machine, reduce maintenance rate, increase the overall strength of roller, improve use effect.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically, it relates to a roller device for a round bale baler. Background Technology

[0002] In agricultural straw recycling and forage storage, round bale balers are one of the core pieces of equipment. Their roller structure directly determines the bale forming quality, operational efficiency, and equipment lifespan. Traditional rollers often have a smooth outer surface. During operation, as the roller rotates, the straw tends to shift towards both ends along the roller's axis, failing to concentrate in the center. This results in uneven bales with loose ends and insufficient compactness, affecting subsequent stacking, transportation, and storage. Furthermore, the loose bales may scatter during transport, increasing operational losses. Additionally, some rollers use a segmented design, leading to complex manufacturing processes, high costs, and inconvenient disassembly for maintenance. The connection between the roller and the central shaft lacks effective support, and long-term operation can cause concentricity deviations, exacerbating equipment vibration and further affecting bale forming stability. Moreover, traditional roller surfaces lack sufficient anti-slip properties, resulting in low friction with the straw and a tendency to slip, reducing baling efficiency.

[0003] Chinese patent application number CN201621420706.4 discloses a roller and baler, belonging to the field of agricultural machinery. The roller includes a cylinder and a central shaft, with the central shaft fixed at the center of the cylinder. At least one end of the central shaft has a transmission component, extending along the length of the cylinder to the outside. A helical body is provided on the outer circumferential surface of the cylinder, comprising symmetrically distributed left-handed and right-handed helical bodies. The cylinder has a first free end and a second free end opposite to the first free end. The left-handed helical bodies are closer to the first free end than the right-handed helical bodies, and the right-handed helical bodies are closer to the second free end than the left-handed helical bodies. During baling, the straw strips accumulate in the middle of the roller under the action of the left-handed and right-handed helical bodies, ensuring that the straw strips do not shift towards either end of the roller. Balers with this type of roller produce neater bales with good compactness; however, the multiple spiral structures in this patent cause uneven distribution of force points on the roller surface. When the straw strips come into contact with the protrusions, local high pressure is easily generated. Long-term operation will lead to accelerated wear of the protrusions, especially since the protrusions are conical structures with the far end smaller than the connecting end. The small contact area at the top results in greater pressure per unit area, further shortening the service life of the protrusions and increasing the frequency of maintenance and replacement. At the same time, the roller is not convenient to install and disassemble. Assembly requires multiple steps, such as fixing the end cap to the cylinder, connecting the flange to the bearing seat, and pressing the central shaft to the transmission components. The steps are cumbersome and require high assembly precision. This not only prolongs the installation time, but also requires the disassembly of multiple related components when repairing or replacing the central shaft or roller, affecting the work efficiency. Utility Model Content

[0004] The main technical problem to be solved by this utility model is to provide a roller device for a round bale baler with a simple overall structure, which simplifies the installation process, reduces the maintenance rate, increases the overall strength of the roller, and improves the performance of the roller.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A roller device for a round bale baler includes a double sprocket, a single sprocket, and an integrated roller shaft assembly. The double sprocket and the single sprocket are respectively fixedly installed at both ends of the integrated roller shaft assembly. A first bearing is rotatably installed at one end of the integrated roller shaft assembly near the double sprocket, and a second bearing is rotatably installed at the other end of the integrated roller shaft assembly near the single sprocket. The integrated cylinder-shaft assembly includes a central shaft, on the outer surface of which multiple evenly spaced support plates are fixedly installed. The outer surfaces of the multiple support plates are fitted with the same roller, and the outer surface of the roller is provided with multiple ribs along the axial direction.

[0006] The following are further optimizations of the above technical solution by this utility model: The central shaft is configured as a shaft body in the middle, and a second shaft shoulder body is fixedly connected to both ends of the shaft body. A first shaft shoulder body is fixedly connected to the other end of each second shaft shoulder body. Multiple support plates are evenly spaced on the outer surface of the shaft. Further optimization: The diameter of the second shoulder body is smaller than the diameter of the shaft body, and the diameter of the first shoulder body is smaller than the diameter of the second shoulder body.

[0007] Further optimization: The double sprocket is fixedly installed on one of the first shaft shoulder bodies, and the single sprocket is fixedly installed on the other first shaft shoulder body.

[0008] Further optimization: The first bearing is fixedly mounted on the second shaft shoulder near the double sprocket, and the first bearing flange is fixedly mounted on the rotating outer surface of the first bearing.

[0009] Further optimization: The second bearing is fixedly mounted on the second shaft shoulder near the single sprocket, and a second bearing flange is fixedly mounted on the rotating outer surface of the second bearing.

[0010] Further optimization: A first end cap is bolted to the side of the first bearing flange closest to the roller, and a second end cap is bolted to the side of the second bearing flange closest to the roller.

[0011] Further optimization: The outer surfaces of the first end cap and the second end cap are fitted with the inner surface of the roller with a clearance, and the clearance between the outer surfaces of the first end cap and the second end cap and the inner surface of the roller is set to 5-10mm.

[0012] This utility model adopts the above-mentioned technical solution, which is ingenious in conception and reasonable in structure. It can improve the forming quality of hay bales. By axially arranging the ribs on the outer surface of the roller, the contact pressure and friction coefficient with the hay strips are increased, reducing slippage and ensuring that the hay strips stably follow the rotation of the roller. This prevents the hay strips from moving along the axis to both ends, so that the hay is concentrated and piled up in the central area. The resulting hay bales are neat and compact, reducing the loss of hay during transportation.

[0013] Moreover, it simplifies the installation and maintenance process. By adopting an integrated cylinder-shaft assembly design, the central shaft, support plate and roller are integrated into a single structure. During installation, there is no need for multiple complex splicing processes. It can be directly fixed to the equipment through the bearing flange. During maintenance and replacement, there is no need to disassemble multiple related parts, reducing operation steps, shortening downtime and improving work efficiency.

[0014] At the same time, it can enhance the structural strength and stability. The central shaft is connected to the roller through multiple evenly distributed support plates, which disperses the stress points, improves the overall rigidity, and reduces the concentricity deviation after long-term operation. The first end cover and the second end cover provide support and sealing for both ends of the roller, which not only strengthens the roller strength but also prevents the straw from entering the interior and causing failure, reduces the maintenance rate, and extends the service life of the equipment.

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model; Figure 2 This is an internal schematic diagram of the overall structure in an embodiment of this utility model; Figure 3 This is a schematic diagram of the integrated cylinder-shaft assembly in an embodiment of this utility model; Figure 4 This is a front view of the integrated cylinder-shaft assembly in an embodiment of this utility model; Figure 5 This is an embodiment of the present utility model. Figure 3 Sectional view of AA in the middle; Figure 6 This is a left view of the integrated cylinder-shaft assembly in an embodiment of this utility model.

[0017] In the diagram: 1. Double sprocket; 2. Single sprocket; 3. First bearing; 31. First bearing flange; 4. Second bearing; 41. Second bearing flange; 5. First end cap; 6. Second end cap; 7. Integrated cylinder and shaft assembly; 71. Roller; 72. Rib; 73. Central shaft; 731. First shaft shoulder; 732. Second shaft shoulder; 733. Shaft; 74. Support plate. Detailed Implementation

[0018] like Figure 1-6As shown: A roller device for a round bale baler includes a double sprocket 1, a single sprocket 2, and a roller shaft integrated assembly 7. The double sprocket 1 and the single sprocket 2 are respectively fixedly installed at both ends of the roller shaft integrated assembly 7. A first bearing 3 is rotatably installed at one end of the roller shaft integrated assembly 7 near the position of the double sprocket 1, and a second bearing 4 is rotatably installed at the other end of the roller shaft integrated assembly 7 near the position of the single sprocket 2. The integrated cylinder-shaft assembly 7 includes a central shaft 73. Multiple support plates 74 are fixedly installed on the outer surface of the central shaft 73 at uniform intervals. The outer surface of the multiple support plates 74 is fitted with the same roller 71. Multiple ribs 72 are arranged axially on the outer surface of the roller 71.

[0019] The central shaft 73 is configured with a shaft body 733 in the middle. Both ends of the shaft body 733 are fixedly connected to a second shaft shoulder body 732, and the other end of the second shaft shoulder body 732 is fixedly connected to a first shaft shoulder body 731.

[0020] The diameter of the second shoulder body 732 is smaller than the diameter of the shaft body 733, and the diameter of the first shoulder body 731 is smaller than the diameter of the second shoulder body 732.

[0021] The ribs 72 are made of stainless steel plate by stamping. The ribs 72 can increase the contact pressure and friction coefficient between the roller 71 and the straw, reduce the relative sliding of the straw on the surface of the roller 71, and allow the rotational power of the roller 71 to be transmitted to the straw more efficiently, ensuring that the straw follows the roller 71 to rotate stably, and avoiding the decrease in bale efficiency or insufficient bale density due to slippage.

[0022] Multiple support plates 74 are evenly spaced on the outer surface of the shaft 733.

[0023] This design sets the integrated cylinder-shaft assembly 7 as a single structure. First, multiple support plates 74 are fixed on the outer surface of the central shaft 73 body 733. Then, stainless steel plates with stamped ribs 72 are wrapped around the outer surface of the multiple support plates 74 to form a roller 71. This design can further enhance the overall strength of the integrated cylinder-shaft assembly 7, and simplify the installation process, making maintenance and replacement easier.

[0024] The double sprocket 1 is fixedly mounted on one of the first shoulder bodies 731 by a key, and the single sprocket 2 is fixedly mounted on the other first shoulder body 731 by a key.

[0025] The first bearing 3 is fixedly mounted on the second shaft shoulder 732 near the double sprocket 1. The first bearing 3 is a ball bearing, which can be obtained commercially.

[0026] The first bearing flange 31 is fixedly installed on the rotating outer surface of the first bearing 3.

[0027] The second bearing 4 is fixedly mounted on the second axle shoulder 732 near the single sprocket 2. The second bearing 4 is also a ball bearing, which is commercially available.

[0028] The second bearing flange 41 is fixedly installed on the rotating outer surface of the second bearing 4.

[0029] A first end cover 5 is fixedly installed on the side of the first bearing flange 31 near the roller 71 by bolts. Multiple first threaded holes are opened on the first end cover 5 at positions corresponding to the mounting holes on the first bearing flange 31 to facilitate bolt connection.

[0030] A second end cover 6 is bolted to the side of the second bearing flange 41 near the roller 71. Multiple second threaded holes are opened on the second end cover 6 at positions corresponding to the mounting holes on the second bearing flange 41 to facilitate bolt connection.

[0031] The outer surfaces of the first end cap 5 and the second end cap 6 are fitted with the inner surface of the roller 71 with a clearance. The clearance between the outer surfaces of the first end cap 5 and the second end cap 6 and the inner surface of the roller 71 is set to 10mm. This clearance is used for assembling and fixing the two ends of the roller 71 with the first end cap 5 and the second end cap 6.

[0032] With this design, the first end cap 5 and the second end cap 6 can seal both ends of the roller 71 without hindering its rotation, preventing the hay from entering the roller 71 during the bundling process. In addition, they can provide further support to the roller 71, strengthen its strength, and reduce the maintenance rate.

[0033] During installation, first, fit the first end cap 5 onto one end of the central shaft 73 of the integrated cylinder shaft assembly 7. Then, insert the end of the central shaft 73 fitted with the first end cap 5 into the corresponding position on the mounting plate on one side of the baler. Next, fix the first bearing 3 and the first bearing flange 31 onto the second shaft shoulder 732 in sequence. Then, fix the first bearing flange 31, the mounting plate of the baler, and the first end cap 5 together with bolts. Finally, fix the double sprocket 1 onto the first shaft shoulder 731.

[0034] The other end of the integrated cylinder-shaft assembly 7 is first fitted with the second end cap 6 in the same manner, then inserted into the corresponding position on the mounting plate on the other side of the baler. The second bearing 4 and the second bearing flange 41 are then fixedly installed on the second shaft shoulder 732 and locked in place with bolts. Finally, the single sprocket 2 is fixedly installed on the first shaft shoulder 731. The installation process is simple. For those skilled in the art, any changes, modifications, substitutions, and variations made to the embodiments without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A roller device for a round bale baler, characterized in that: It includes a double sprocket (1), a single sprocket (2) and a cylindrical shaft integrated assembly (7), wherein the double sprocket (1) and the single sprocket (2) are respectively fixedly installed at both ends of the cylindrical shaft integrated assembly (7), a first bearing (3) is rotatably installed at one end of the cylindrical shaft integrated assembly (7) near the position of the double sprocket (1), and a second bearing (4) is rotatably installed at the other end of the cylindrical shaft integrated assembly (7) near the position of the single sprocket (2); The integrated cylinder-shaft assembly (7) includes a central shaft (73), and multiple support plates (74) are fixedly installed on the outer surface of the central shaft (73) at uniform intervals. The outer surface of the multiple support plates (74) is fitted with the same roller (71), and the outer surface of the roller (71) is provided with multiple ribs (72) along the axial direction.

2. The roller device of a round bale baler according to claim 1, characterized in that: The central shaft (73) is configured with a shaft body (733) in the middle. Both ends of the shaft body (733) are fixedly connected to a second shoulder body (732), and the other end of the second shoulder body (732) is fixedly connected to a first shoulder body (731). Multiple support plates (74) are evenly spaced on the outer surface of the shaft (733).

3. The roller device of a round bale baler according to claim 2, characterized in that: The diameter of the second shoulder body (732) is smaller than the diameter of the shaft body (733), and the diameter of the first shoulder body (731) is smaller than the diameter of the second shoulder body (732).

4. The roller device of a round bale baler according to claim 3, characterized in that: The double sprocket (1) is fixedly mounted on one of the first shoulder bodies (731), and the single sprocket (2) is fixedly mounted on the other first shoulder body (731).

5. The roller device of a round bale baler according to claim 4, characterized in that: The first bearing (3) is fixedly mounted on the second shaft shoulder (732) near the double sprocket (1), and the first bearing flange (31) is fixedly mounted on the rotating outer surface of the first bearing (3).

6. The roller device of a round bale baler according to claim 5, characterized in that: The second bearing (4) is fixedly mounted on the second shaft shoulder (732) near the single sprocket (2), and the second bearing flange (41) is fixedly mounted on the rotating outer surface of the second bearing (4).

7. The roller device of a round bale baler according to claim 6, characterized in that: The first bearing flange (31) is fixedly mounted with a first end cap (5) by bolts on the side of the roller (71), and the second bearing flange (41) is fixedly mounted with a second end cap (6) by bolts on the side of the roller (71).

8. The roller device of a round bale baler according to claim 7, characterized in that: The outer surfaces of the first end cap (5) and the second end cap (6) are fitted with the inner surface of the roller (71) with a clearance. The clearance between the outer surfaces of the first end cap (5) and the second end cap (6) and the inner surface of the roller (71) is set to 5-10mm. This clearance is used for assembling and fixing the two ends of the roller (71) with the first end cap (5) and the second end cap (6).

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