Knife roller assembly and tobacco counter-rotating cutter

Abstract

The application provides a knife roller assembly and a tobacco double-roller shredding machine, which comprises a roller shaft, a shredding blade and a fixing key strip. A plurality of convex edges are arranged on the outer peripheral wall of the roller shaft, the plurality of convex edges extend along the circumferential direction of the roller shaft and are arranged along the axial direction to form limiting grooves between adjacent convex edges. The shredding blade is sleeved on the outer peripheral side of the roller shaft, a convex section protruding radially inward is arranged on the inner ring of the shredding blade, the convex section is inserted into the limiting groove, and the limiting groove limits the convex section in the axial direction of the roller shaft. The fixing key strip is inserted between the shredding blade and the roller shaft and is opposite to the limiting groove in the circumferential direction of the roller shaft, so as to limit the convex section in the limiting groove. The convex edges are arranged on the outer peripheral wall of the roller shaft to form the limiting grooves, the convex section of the shredding blade is inserted into the limiting groove, and the axial direction is limited. The fixing key strip is inserted between the shredding blade and the roller shaft and is opposite to the limiting groove in the circumferential direction, and the convex section is prevented from being pulled out. Few parts need to be disassembled and operated.

Description

Technical Field

[0001] This application belongs to the technical field of tobacco processing equipment, specifically relating to a cutter roller assembly and a tobacco double-roller shredder. Background Technology

[0002] In existing tobacco shredders, a cutter roller assembly is typically used to shred tobacco. This assembly usually consists of shredding blades and spacer discs stacked alternately on a rotating shaft and secured by a fixing device. Assembling this assembly requires manually installing each shredding blade and spacer disc onto the shaft one by one, a cumbersome process. During maintenance, replacing a component may require extensive disassembly of the shredding blades and spacer discs, making the disassembly and reassembly complex and increasing downtime and maintenance costs. Utility Model Content

[0003] Therefore, the technical problem to be solved by this application is to provide a cutter roller assembly and a tobacco double roller shredder that can simplify disassembly and assembly operations and reduce downtime and maintenance costs.

[0004] To address the aforementioned problems, a first aspect of this application provides a cutter roller assembly, including a roller shaft, a slicing blade, and a fixing key. The outer peripheral wall of the roller shaft has multiple protruding ridges extending circumferentially and arranged axially to form a limiting groove between adjacent ridges. The slicing blade is sleeved on the outer peripheral side of the roller shaft, and its inner ring has a radially inwardly protruding section. The protruding section is inserted into the limiting groove so that the limiting groove limits the protruding section axially on the roller shaft. The fixing key is inserted between the slicing blade and the roller shaft, and is opposite to the limiting groove circumferentially on the roller shaft to limit the protruding section within the limiting groove.

[0005] Optionally, a plurality of the protruding ridges arranged along the axial direction of the roller shaft form a protruding ridge group. The roller shaft is provided with a plurality of the protruding ridge groups in the circumferential direction. A keyway is provided between adjacent protruding ridge groups. The protruding segment can move along the axial direction of the roller shaft via the keyway to be opposite the limiting groove in the circumferential direction of the roller shaft.

[0006] Optionally, the protrusions in each of the protrusion groups are aligned axially on the roller shaft, and the protrusion groups are evenly distributed in the circumferential direction of the roller shaft so that the groove depth, groove width and groove length of each of the formed limiting grooves are the same.

[0007] Optionally, the inner ring of the slicing blade is provided with a recessed section that is recessed radially outward. When the convex section is inserted into the limiting groove, the recessed section is arranged opposite to the keyway to form an insertion space, and the fixing key is inserted into the insertion space. There are multiple recessed sections and multiple convex sections. In the circumferential direction of the slicing blade, the recessed sections and the convex sections are arranged alternately.

[0008] Optionally, the end of the protrusion is rounded.

[0009] Optionally, the cross-section of the fixed key bar is adapted to the insertion space; the cross-section of the fixed key bar is fan-shaped, and the shape and size of the insertion space are adapted to the fixed key bar.

[0010] Optionally, the cutter roller assembly includes two positioning rings, which are respectively fixedly disposed at both ends of the roller shaft to clamp and fix the fixing key bar in the axial direction of the roller shaft.

[0011] Optionally, the cutter roller assembly includes a variety of slicing blades, the different types of slicing blades having different sizes and / or shapes, and the different types of slicing blades being alternatively arranged on the roller shaft.

[0012] Optionally, the roller shaft is formed as a single unit; or, the roller shaft comprises multiple shaft segments that are axially connected.

[0013] A second aspect of this application provides a tobacco double-roller shredder, including the cutter roller assembly as described above.

[0014] Beneficial effects:

[0015] The present invention provides a cutter roller assembly and a tobacco shredder with rollers. Multiple circumferentially extending and axially arranged protrusions are provided on the outer peripheral wall of the roller shaft, thereby forming multiple circumferentially extending and axially arranged limiting grooves between adjacent protrusions. An inwardly protruding section is provided on the shredder blade, which is inserted into the limiting groove, thus axially limiting and fixing the shredder blade. A fixing key is provided and inserted between the shredder blade and the roller shaft, and is positioned circumferentially opposite the limiting groove. This forms a stop in the extending direction of the limiting groove, limiting the protrusion within the corresponding limiting groove and preventing it from dislodging. This ensures a good fixing effect, and fewer parts need to be disassembled during assembly and disassembly, making the assembly and disassembly operation simpler and more convenient. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the cutter roller assembly according to an embodiment of this application;

[0017] Figure 2This is a three-dimensional structural diagram of the slicing blade according to an embodiment of this application;

[0018] Figure 3 This is a three-dimensional structural diagram of the fixed key bar according to an embodiment of this application;

[0019] Figure 4 This is a three-dimensional structural diagram of the roller shaft in Embodiment 1 of this application;

[0020] Figure 5 This is a three-dimensional structural diagram of the roller shaft in Embodiment 2 of this application.

[0021] The reference numerals in the attached figures are as follows:

[0022] 1. Roller shaft; 11. Raised rib; 12. Limiting groove; 13. Keyway; 2. Cutting blade; 21. Raised section; 22. Concave section; 3. Fixing key bar; 4. Positioning ring; 5. Shaft section. Detailed Implementation

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] 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 connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] See also Figures 1 to 5 As shown, according to a first aspect of this application, a cutter roller assembly is provided, including a roller shaft 1, a slicing blade 2, and a fixing key 3. The outer peripheral wall of the roller shaft 1 is provided with a plurality of protruding ridges 11, which extend circumferentially along the roller shaft 1 and are arranged axially to form a limiting groove 12 between adjacent protruding ridges 11. The slicing blade 2 is sleeved on the outer peripheral side of the roller shaft 1, and the inner ring of the slicing blade 2 is provided with a protruding section 21 that protrudes radially inward. The protruding section 21 is inserted into the limiting groove 12 so that the limiting groove 12 limits the protruding section 21 in the axial direction of the roller shaft 1. The fixing key 3 is inserted between the slicing blade 2 and the roller shaft 1 and is opposite to the limiting groove 12 in the circumferential direction of the roller shaft 1 to limit the protruding section 21 in the limiting groove 12.

[0028] By providing multiple circumferentially extending and axially arranged protrusions 11 on the outer peripheral wall of the roller shaft 1, multiple circumferentially extending and axially arranged limiting grooves 12 are formed between adjacent protrusions 11. By providing an inwardly protruding section 21 on the shredder blade 2, the section 21 is inserted into the limiting groove 12, and the limiting groove 12 can limit and fix the shredder blade 2 in the axial direction. By providing a fixing key 3 and inserting it between the shredder blade 2 and the roller shaft 1, and positioning it opposite the limiting groove 12 in the circumferential direction of the roller shaft 1, a stop can be formed in the extending direction of the limiting groove 12, limiting the section 21 in the corresponding limiting groove 12, preventing the section 21 from coming out of the limiting groove 12, ensuring a good fixing effect. During disassembly and assembly operations, fewer parts need to be disassembled and assembled, making the assembly and disassembly operations simpler and more convenient.

[0029] Specifically, compared to existing technologies, it reduces the use of spacer discs, simplifies the assembly process, and enables modular maintenance and replacement, thereby reducing maintenance costs and downtime.

[0030] The shape and size of the protrusion 21 match the shape and size of the limiting groove 12, achieving dual positioning of the axial and circumferential directions of the slicing blade 2, ensuring a good fixing effect, and eliminating the need for complex adjustments, further shortening assembly and maintenance time and reducing downtime costs.

[0031] The limiting groove 12 matches the protrusion 21 to ensure the precise position of the shredding blade 2 and to ensure the uniform width of the tobacco shreds.

[0032] The spacing of the limiting grooves 12 matches the thickness of the slicing blades 2, and is completed from one side in one go during the processing of the roller 1, ensuring that the installation position of all slicing blades 2 is uniform and reducing the accumulation of processing errors. The uniform spacing between adjacent slicing blades 2 reduces friction during operation, reduces heat generation, improves the heat dissipation performance and overall durability of the equipment, and extends the service life of the equipment.

[0033] The fixing key 3 fills the space between the shredder blade 2 and the roller 1, forming a rigid fixing system to prevent the shredder blade 2 from shifting or loosening due to vibration during high-speed rotation, thus enhancing the stability of the component. At the same time, it reduces the use of spacer discs in traditional structures, reduces friction between components, reduces heat generation and energy consumption, and extends the service life of the equipment.

[0034] Multiple protrusions 11 arranged along the axial direction of the roller shaft 1 form a protrusion group. The roller shaft 1 is provided with multiple protrusion groups arranged in the circumferential direction. A keyway 13 is provided between adjacent protrusion groups. The protrusion segment 21 can move along the axial direction of the roller shaft 1 through the keyway 13 to be opposite to the limiting groove 12 in the circumferential direction of the roller shaft 1.

[0035] By providing a keyway 13, clearance space is provided when the shredder blade 2 is assembled onto the roller shaft 1. This allows the protrusion 21 of the inner ring of the shredder blade 2 to move axially along the roller shaft 1 via the keyway 13 to a position circumferentially opposite to the limiting groove 12, avoiding assembly difficulties caused by the obstruction of the roller shaft 1's protrusion 11 during the installation of the shredder blade 2. Simultaneously, the cooperation between the keyway 13 and the protrusion assembly forms an axial guiding structure, enabling the shredder blade 2 to be quickly positioned to the target limiting groove 12 via the keyway 13, simplifying the assembly process and reducing axial insertion resistance and adjustment time. During assembly, the shredder blade 2 is inserted from one end of the roller shaft 1, quickly moved to the corresponding limiting groove 12 by the guide of the keyway 13, and then rotated to insert the protrusion 21 from one end of the limiting groove 12, thus completing the positioning and improving installation efficiency.

[0036] The number of keyways 13 matches the number of protrusions 21 on the shredder blade 2. For example, four keyways 13 are provided on the roller shaft 1 along the circumference, and four protrusions 21 are provided on the shredder blade 2 along the circumference. When the shredder blade 2 is assembled to the roller shaft 1, the protrusions 21 correspond one-to-one with the keyways 13.

[0037] The keyway 13 extends along the axial direction of the roller 1.

[0038] The width of the keyway 13 can be matched with the width of the protrusion 21, thereby providing a good guiding effect.

[0039] The protrusions 11 in each protrusion group are aligned axially on the roller 1, and each protrusion group is evenly distributed in the circumferential direction of the roller 1 so that the groove depth, groove width and groove length of each limiting groove 12 are the same.

[0040] Multiple convex ribs 11 arranged axially along the roller shaft 1 form a rib group, and multiple rib groups are arranged circumferentially on the roller shaft 1, so that each rib group is evenly distributed circumferentially. The keyways 13 between adjacent rib groups and the limiting grooves 12 within the rib groups are also evenly distributed. This allows the circumferential force to be symmetrically transmitted to the roller shaft 1 through the evenly distributed rib groups after the inner annular protrusion 21 of the shredder blade 2 is inserted into the limiting groove 12, avoiding unilateral force concentration and skewing of the shredder blade 2. The axial load is evenly borne by the aligned ribs 11 within the rib groups, reducing local stress concentration.

[0041] The groove depth of the limiting groove 12 refers to the radial length of the limiting groove 12 along the roller shaft 1. The groove width of the limiting groove 12 refers to the circumferential length of the limiting groove 12 along the roller shaft 1. The groove length of the limiting groove 12 refers to the axial length of the limiting groove 12 along the roller shaft 1.

[0042] The groove length of the limiting groove 12 is the same as the length of the protrusion 21. The length of the protrusion 21 refers to its circumferential length along the roller 1. When the protrusion 21 is inserted into the limiting groove 12, its two ends are respectively located at its two ends. One fixing key 3 is opposite to one end of the limiting groove 12 and abuts against one end of the protrusion 21, while the other fixing key 3 is opposite to the other end of the limiting groove 12 and abuts against the other end of the protrusion 21. Thus, the two fixing key 3 securely limit the protrusion 21 within the corresponding limiting groove, achieving circumferential fixation.

[0043] The inner ring of the slicing blade 2 is provided with a recessed section 22 that is recessed outward in the radial direction. When the protruding section 21 is inserted into the limiting groove 12, the recessed section 22 is arranged opposite to the keyway 13 to form an insertion space, and the fixing key 3 is inserted into the insertion space.

[0044] The insertion space enclosed by the concave section 22 and the keyway 13 provides a precise installation position for the fixed key bar 3. After the fixed key bar 3 is inserted, the convex section 21 of the shredder blade 2 can be firmly restricted in the limiting groove 12 in the circumferential direction of the roller shaft 1, preventing the shredder blade 2 from circumferentially moving or rotating when rotating at high speed. With the axial limiting of the limiting groove 12, the shredder blade 2 is fixed in both the axial and circumferential directions, improving the reliability of the position of the shredder blade 2 during the cutting process.

[0045] The insertion space enclosed by the concave section 22 and the keyway 13 can also provide guidance for the assembly of the shredder blade 2. During installation, simply align the convex section 21 of the shredder blade 2 with the limiting groove 12 and insert it. Rotate until the concave section 22 is aligned with the keyway 13 to form the insertion space. No additional gap adjustment is required, which simplifies the installation steps of the fixed key strip 3.

[0046] When the protrusion 21 is inserted into the limiting groove 12, the keyway 13 and the concave section 22 of the inner ring of the shredder blade 2 form an insertion space. The fixing key 3 can be inserted into this space along the axial direction to firmly limit the protrusion 21 in the limiting groove 12 in the circumferential direction, ensuring that the shredder blade 2 is stably positioned in the circumferential direction after assembly.

[0047] The slicing blade 2 is annular, specifically roughly circular. Both the convex section 21 and the concave section 22 are located on the inner ring of the slicing blade 2. The convex section 21 protrudes radially towards the center of the ring. The concave section 22 is recessed radially outward towards the outer ring side of the slicing blade 2.

[0048] The outer ring size of the shredder blade 2 can be customized according to the tobacco specifications.

[0049] The thickness of the shredder blade 2 is precisely machined according to the specifications of the target tobacco shreds to ensure cutting accuracy and consistency.

[0050] There are multiple concave segments 22 and convex segments 21, and the concave segments 22 and convex segments 21 are arranged alternately in the circumferential direction of the slicing blade 2.

[0051] By arranging the concave section 22 and the convex section 21 alternately, the fixed key bar 3 can be evenly inserted into the insertion space enclosed by the keyway 13 and the concave section 22 along the circumference of the shredder blade 2, forming multiple circumferential limiting points. This ensures that the shredder blade 2 is subjected to uniform force in the circumferential direction on the roller shaft 1, avoiding skewing or rotational torque caused by unilateral limiting, ensuring the stability of the shredder blade 2 when rotating at high speed, and improving the consistency of the tobacco shred cutting width.

[0052] As one possible implementation, the number of concave segments 22 and convex segments 21 are both four.

[0053] Specifically, the length of the concave segment 22 in the circumferential direction of the slicing blade can be equal to the length of the convex segment 21 in the circumferential direction of the slicing blade.

[0054] The concave section 22 and the convex section 21 are evenly arranged in the circumferential direction of the slicing blade 2.

[0055] The end of the convex segment 21 is rounded.

[0056] By designing the end of the protrusion 21 as a rounded transition, stress concentration during assembly can be eliminated, reducing assembly resistance when the protrusion 21 of the slicing blade 2 is inserted into the limiting groove 12 of the roller shaft 1, and avoiding wear of the protrusion 21 or the limiting groove 12 due to hard contact. At the same time, the rounded surface can reduce the coefficient of friction between the slicing blade 2 and the contact surface with the roller shaft 1 when the slicing blade 2 rotates at high speed, reducing energy loss and heat generation, improving the smoothness of component fit, and thus enhancing the operational stability and service life of the cutter roller assembly.

[0057] The cross-section of the fixed key bar 3 is adapted to the insertion space.

[0058] By adapting the cross-section of the fixing key 3 to the insertion space, a tight fit can be ensured between the fixing key 3, the concave section 22 of the dicing blade 2, and the keyway 13 of the roller shaft 1, preventing circumferential movement of the dicing blade 2 due to dimensional deviations. The adapted cross-sectional shape can completely fill the insertion space, allowing the fixing key 3 to effectively limit the convex section 21 of the dicing blade 2 in the circumferential direction, enhancing the positioning stability of the dicing blade 2. At the same time, the tightly fitting structure can reduce collisions and noise caused by vibration during high-speed operation, reduce component wear, and improve the operating accuracy and service life of the cutter roller assembly.

[0059] As a feasible implementation method, the cross-section of the fixed key bar 3 is fan-shaped, and the shape and size of the insertion space are adapted to the fixed key bar 3.

[0060] By setting the fixed key bar 3 and the insertion space to a matching fan-shaped structure, a tight compression limit can be formed on the convex section 21 of the shredding blade 2 in the circumferential direction of the roller shaft 1, preventing the shredding blade 2 from circumferentially moving or rotating due to the gap when rotating at high speed, ensuring the accuracy of the cutting position and avoiding uneven tobacco width.

[0061] The fan-shaped structure ensures that the force on the fixed key bar 3 is evenly distributed across the arc-shaped wall of the insertion space, preventing key bar deformation or wear of the slicing blade 2 caused by stress concentration. Simultaneously, the closely fitted fan-shaped cross-section reduces air turbulence and vibration noise during high-speed operation, improving the stability of the equipment.

[0062] The cross-section of the fixed key bar 3 refers to the section perpendicular to its length direction, that is, the section perpendicular to the axial direction of the roller shaft 1. The projection of the insertion space onto the plane containing the cross-section of the fixed key bar 3 is adapted to the shape and size of the cross-section.

[0063] The cutter roller assembly includes two positioning rings 4, which are respectively fixed at both ends of the roller shaft 1 to clamp and fix the fixing key strip 3 in the axial direction of the roller shaft 1.

[0064] By fixing positioning rings 4 at both ends of the roller shaft 1, an axial clamping force is formed on the fixed key bar 3 to prevent the fixed key bar 3 from coming out or shifting along the roller shaft 1 axially, thereby improving the overall rigidity and operational reliability of the cutter roller assembly.

[0065] The positioning ring 4 is threaded to both ends of the roller 1, which can quickly lock the fixed key bar 3 axially.

[0066] The two positioning rings 4 are symmetrically arranged and symmetrically clamp the fixing key 3, so that the axial load is evenly distributed at both ends of the roller 1, avoiding bending of the roller 1 or skewing of the fixing key 3 due to unilateral force. At the same time, the clamping force of the positioning rings 4 can counteract the axial reaction force generated by the cutting blade 2 during cutting, reduce the relative sliding wear between the fixing key 3 and the keyway 13 and the concave section 22 of the cutting blade 2, and extend the service life of the components.

[0067] Among them, the fixed key bar 3 and the positioning ring 4 are made of high-strength alloy and wear-resistant materials to improve the equipment's impact resistance and long-term stability.

[0068] The cutter roller assembly includes a variety of shredding blades 2, which are of different sizes and / or shapes, and are interchangeably mounted on the roller shaft 1.

[0069] By replacing the cutting blades 2 of different sizes, the cutting width, thickness or shape of the tobacco shreds can be quickly adjusted without modifying the roller 1 or the overall machine structure, which significantly improves the equipment's adaptability to different tobacco raw materials or product specifications and meets diverse production needs.

[0070] Among them, different types of slicing blades 2 can have different widths or different cutting angles.

[0071] Roller 1 is a rotary shaft, and can be manufactured using either integral machining or segmented assembly according to the equipment size requirements. Integral machining is more suitable for conventional lengths, while segmented assembly is more suitable for longer dimensions.

[0072] In Example 1, as Figure 4 As shown, the roller 1 is formed as a whole, that is, the manufacturing scheme adopts integral processing.

[0073] The roller shaft 1 is formed by integral processing and is suitable for cutter roller assemblies of conventional length. That is, the roller shaft 1 is processed into a single piece. The surface is provided with four truncated fan-shaped keyways 13 evenly arranged in the circumferential direction, and the surface is also provided with equally spaced limiting grooves 12.

[0074] In Example 2, as Figure 5 As shown, the roller 1 includes multiple shaft segments 5, which are axially connected. This represents a segmented assembly manufacturing scheme. In this scheme, the number of shaft segments 5 can be two or more, and the shaft segments 5 are connected sequentially along the axial direction. Each shaft segment 5 can be manufactured as a single piece.

[0075] Among them, the adjacent shaft segments 5 are connected by a high-precision threaded structure, supplemented by positioning pins and locking nuts, to ensure overall accuracy, realize the precise assembly and firm locking of each shaft segment 5, ensure overall coaxiality and have high rigidity and high coaxiality, and at the same time reduce the difficulty of processing and transportation.

[0076] The installation process for the cutter roller assembly is as follows:

[0077] For a fully machined roller 1, the integrally formed roller 1 is directly installed in the equipment. For a segmented roller 1, each segment 5 is first installed in sequence, and then assembled into a whole using high-precision threaded connections, locating pins, and locking nuts.

[0078] Subsequently, the slicing blades 2 are inserted sequentially from one end of the roller shaft 1, aligning the protrusions 21 of the inner ring of the slicing blade 2 with the corresponding limiting grooves 12. After the slicing blade 2 reaches the target position, it is rotated so that the concave section 22 inserts into the keyway 13. At the same time, the protrusions 21 embed into the limiting grooves 12, completing the positioning. After all the slicing blades 2 are installed, the fixing key 3 is inserted axially to fill the gaps in the keyway 13 and restrict the rotation of the slicing blades 2. Finally, threaded positioning rings 4 are installed at both ends of the roller shaft 1 to lock the fixing key 3 and the entire assembly, ensuring the stable operation of the cutter roller assembly.

[0079] The working process of the cutter roller assembly is as follows:

[0080] After the equipment starts, the cutter roller assembly rotates at high speed, and the shredding blades 2 precisely cut the tobacco leaves. Regardless of whether the roller shaft 1 is integrally machined or segmented, the uniform spacing of the shredding blades 2 can be ensured, effectively reducing friction and heat generation, thereby improving cutting efficiency and equipment durability. Specifically, the integrally machined roller shaft 1 ensures structural precision due to its one-piece molding characteristic. The segmented roller shaft 1 relies on high-precision threaded connections, locating pins, and locking nuts to ensure that each shaft segment 5 is firmly connected and coaxial as a whole, maintaining the long-term high-precision operation of the cutter roller assembly.

[0081] A second aspect of this application provides a tobacco double-roller shredder, including the cutter roller assembly as described above.

[0082] This utility model provides a cutter roller assembly and a tobacco shredder with rollers. By optimizing the structural design of the shredder blade 2, roller shaft 1, fixing key 3 and positioning ring 4, it effectively reduces processing errors, improves cutting accuracy, reduces equipment wear, and improves installation and maintenance efficiency. It has wide application value and can be used in various tobacco processing equipment to improve the quality of tobacco shredding and increase production efficiency.

[0083] This utility model provides a cutter roller assembly and a tobacco shredder with two rollers. By adopting a combination design of annular shredding blades 2, a flexible roller shaft 1 manufacturing scheme, a fixed key strip 3 with a fan-shaped cut edge, and a threaded positioning ring 4, it not only significantly improves the positioning accuracy and cutting quality of the shredding blades 2, but also provides a segmented combined roller shaft 1 solution for long dimensions. The segmented roller shaft 1 adopts a high-precision threaded connection structure, supplemented by positioning pins and locking nuts, to achieve a firm connection and overall coaxiality between each shaft segment 5. This solves the problems of high overall machining difficulty and error accumulation of long roller shafts 1, reduces equipment energy consumption, extends service life, and simplifies maintenance operations, and has broad industrial application value.

[0084] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0085] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A cutter roller assembly, characterized in that, The assembly includes a roller (1), a slicing blade (2), and a fixing key (3). The outer peripheral wall of the roller (1) is provided with a plurality of protruding ridges (11). The plurality of protruding ridges (11) extend circumferentially along the roller (1) and are arranged axially to form a limiting groove (12) between adjacent protruding ridges (11). The slicing blade (2) is sleeved on the outer peripheral side of the roller (1). The inner ring of the slicing blade (2) is provided with a protruding section (21) that protrudes radially inward. The protruding section (21) is inserted into the limiting groove (12) so that the limiting groove (12) limits the protruding section (21) axially along the roller (1). The fixing key (3) is inserted between the slicing blade (2) and the roller (1) and is opposite to the limiting groove (12) circumferentially along the roller (1) to limit the protruding section (21) within the limiting groove (12).

2. The cutter roller assembly according to claim 1, characterized in that, A plurality of protruding ridges (11) arranged along the axial direction of the roller shaft (1) form a protruding ridge group. The roller shaft (1) is provided with a plurality of protruding ridge groups arranged in the circumferential direction. A keyway (13) is provided between adjacent protruding ridge groups. The protruding segment (21) can move along the axial direction of the roller shaft (1) via the keyway (13) to be opposite the limiting groove (12) in the circumferential direction of the roller shaft (1).

3. The cutter roller assembly according to claim 2, characterized in that, The protrusions (11) in each of the protrusion groups are aligned axially on the roller (1), and each of the protrusion groups is evenly arranged in the circumferential direction of the roller (1) so that the groove depth, groove width and groove length of each of the limiting grooves (12) are the same.

4. The cutter roller assembly according to claim 2, characterized in that, The inner ring of the slicing blade (2) is provided with a recessed section (22) that is recessed outward in the radial direction. When the protruding section (21) is inserted into the limiting groove (12), the recessed section (22) is arranged opposite to the keyway (13) to form an insertion space. The fixing key bar (3) is inserted into the insertion space. There are multiple concave segments (22) and convex segments (21), and the concave segments (22) and convex segments (21) are arranged alternately in the circumferential direction of the slicing blade (2).

5. The cutter roller assembly according to claim 1, characterized in that, The end of the convex segment (21) is rounded.

6. The cutter roller assembly according to claim 4, characterized in that, The cross-section of the fixed key bar (3) is adapted to the insertion space; The cross-section of the fixed key bar (3) is fan-shaped, and the shape and size of the insertion space are adapted to the fixed key bar (3).

7. The cutter roller assembly according to claim 1, characterized in that, The cutter roller assembly includes two positioning rings (4), which are respectively fixed at both ends of the roller shaft (1) to clamp and fix the fixing key (3) in the axial direction of the roller shaft (1).

8. The cutter roller assembly according to claim 1, characterized in that, The cutter roller assembly includes a variety of slicing blades (2), the different types of slicing blades (2) having different sizes and / or shapes, and the different types of slicing blades (2) can be interchangeably arranged on the roller shaft (1).

9. The cutter roller assembly according to claim 1, characterized in that, The roller (1) is formed as a whole; Alternatively, the roller (1) may include a plurality of shaft segments (5) that are axially connected.

10. A tobacco double-roller shredder, characterized in that, Includes the cutter roller assembly as described in any one of claims 1-9.

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