Knife roll assembly and tobacco double-roll tobacco cutter

Abstract

The invention provides a knife roll assembly and a tobacco double-roll tobacco cutter, the knife roll assembly comprises a roll shaft, a tobacco cutting blade and a fixed key strip, a plurality of convex edges are arranged on the peripheral wall of the roll shaft, the convex edges extend in the circumferential direction of the roll shaft and are arranged in the axial direction so as to form a limiting groove between every two adjacent convex edges, the peripheral side of the roll shaft is sleeved with the tobacco cutting blade, and the fixed key strip is arranged in the limiting groove. The inner ring of the shredding blade is provided with a protruding section protruding inwards in the radial direction, the protruding section is inserted into the limiting groove so that the limiting groove can limit the protruding section in the axial direction of the roller shaft, and 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 that the protruding section can be limited in the limiting groove. Protruding edges are arranged on the peripheral wall of the roller shaft to form limiting grooves, and protruding sections arranged on the shredding blades are inserted into the limiting grooves and limited in the axial direction. The fixed key strip is inserted between the shredding blade and the roll shaft, the circumferential direction of the fixed key strip is opposite to the limiting groove, and the stopping protruding section prevents disengagement. Few parts are disassembled and assembled, and operation is easy and convenient.

Description

Technical Field

[0001] The present application belongs to the technical field of tobacco processing equipment, and in particular relates to a knife roller assembly and a tobacco roller cutter. Background Art

[0002] Existing tobacco roller shredders typically use a blade roller assembly to shred tobacco. This assembly typically consists of alternating stacks of cutting blades and spacer discs mounted on a rotating shaft and secured with a fixture. Assembly requires alternating the blades and spacer discs one by one, making the process cumbersome. Maintenance may require extensive disassembly of the cutting blades and spacer discs to replace a single component, complicating disassembly and assembly, increasing downtime and maintenance costs. Summary of the Invention

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

[0004] In order to solve the above problems, the first aspect of the present application provides a knife roller assembly, including a roller shaft, a shredding blade and a fixed key bar, the outer peripheral wall of the roller shaft is provided with a plurality of ridges, the plurality of ridges extend along the circumference of the roller shaft and are arranged axially to form limiting grooves between adjacent ridges, the shredding blade is sleeved on the outer peripheral side of the roller shaft, the inner ring of the shredding blade is provided with a convex section protruding radially inward, the convex section is inserted in the limiting groove, so that the limiting groove forms a limit on the convex section in the axial direction of the roller shaft, the fixed key bar 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 to limit the convex section in the limiting groove.

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

[0006] Optionally, the ridges in each ridge group are aligned in the axial direction of the roller shaft, and the ridge groups are evenly arranged in the circumferential direction of the roller shaft, so that the groove depth, groove width and groove length of each limiting groove formed are the same.

[0007] Optionally, a concave section that is radially concave outward is provided on the inner ring of the shredding blade. When the convex section is inserted into the limiting groove, the concave section and the keyway are arranged opposite to each other to enclose an insertion space, and the fixed key bar is inserted into the insertion space; the number of the concave sections and the convex sections are both multiple, and the concave sections and the convex sections are arranged alternately in the circumferential direction of the shredding blade.

[0008] Optionally, the end of the convex section is in an arc transition.

[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 knife roller assembly includes two positioning rings, which are respectively fixedly arranged at both ends of the roller shaft to clamp and fix the fixed key strip inside in the axial direction of the roller shaft.

[0011] Optionally, the knife roller assembly includes a plurality of the shredding blades, and the sizes and / or shapes of the different types of the shredding blades are different. The different types of the shredding blades can be interchangeably arranged on the roller shaft.

[0012] Optionally, the roller shaft is formed as a whole; or, the roller shaft includes multiple shaft segments, and the multiple shaft segments are axially connected.

[0013] In a second aspect of the present application, a tobacco double-roller shredder is provided, comprising the blade roller assembly as described above.

[0014] Beneficial effects:

[0015] In the embodiments of the present invention, a knife roller assembly and a tobacco roller cutter are provided. A plurality of ridges extending circumferentially and arranged axially are provided on the outer peripheral wall of the roller shaft, thereby forming a plurality of limiting grooves extending circumferentially and arranged axially between adjacent ridges. By providing an inwardly protruding convex section on the shredding blade, so that the convex section is inserted into the limiting groove, the shredding blade can be limited and fixed in the axial direction through the limiting groove. By providing a fixed key bar, and inserting the fixed key bar between the shredding blade and the roller shaft, and opposite to the limiting groove in the circumferential direction of the roller shaft, a stop can be formed in the extension direction of the limiting groove, limiting the convex section in the corresponding limiting groove, preventing the convex section from falling out of the limiting groove, and ensuring a good fixing effect. During the disassembly and assembly operation, fewer parts need to be disassembled and assembled, and the assembly operation is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the knife roller assembly according to an embodiment of the present application;

[0017] Figure 2This is a schematic diagram of the three-dimensional structure of the shredding blade according to an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of a fixed key bar according to an embodiment of the present application;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the roller shaft of Example 1 of the present application;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the roller shaft of Example 2 of the present application.

[0021] The reference numerals indicate:

[0022] 1. Roller; 11. Raised ridge; 12. Limiting groove; 13. Keyway; 2. Slicing blade; 21. Protruding section; 22. Concave section; 3. Fixed key strip; 4. Positioning ring; 5. Shaft section. DETAILED DESCRIPTION

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] See also Figures 1 to 5 As shown, according to the first aspect of the present application, a knife roller assembly is provided, including a roller shaft 1, a shredding blade 2 and a fixed key strip 3. A plurality of ridges 11 are provided on the outer peripheral wall of the roller shaft 1. The plurality of ridges 11 extend along the circumference of the roller shaft 1 and are arranged axially to form a limiting groove 12 between adjacent ridges 11. The shredding blade 2 is sleeved on the outer peripheral side of the roller shaft 1. A convex section 21 protruding radially inward is provided on the inner ring of the shredding blade 2. The convex section 21 is inserted in the limiting groove 12 so that the limiting groove 12 forms a limit on the convex section 21 in the axial direction of the roller shaft 1. The fixed key strip 3 is inserted between the shredding 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 convex section 21 in the limiting groove 12.

[0028] By providing a plurality of ribs 11 extending circumferentially and arranged axially on the outer peripheral wall of the roller shaft 1, a plurality of limiting grooves 12 extending circumferentially and arranged axially are formed between adjacent ribs 11. By providing an inwardly protruding convex section 21 on the shredding blade 2, so that the convex section 21 is inserted into the limiting groove 12, the shredding blade 2 can be limited and fixed in the axial direction by the limiting groove 12. By providing a fixed key bar 3, and so that the fixed key bar 3 is inserted between the shredding blade 2 and the roller shaft 1, and is opposite to the limiting groove 12 in the circumferential direction of the roller shaft 1, a stop can be formed in the extension direction of the limiting groove 12, limiting the convex section 21 in the corresponding limiting groove 12, preventing the convex section 21 from falling out of the limiting groove 12, and ensuring a good fixing effect. During the disassembly and assembly operation, fewer parts need to be disassembled and assembled, and the assembly operation is simpler and more convenient.

[0029] Specifically, compared with the existing technology, the use of spacer discs is reduced, the assembly process is simplified, and modular maintenance and replacement are achieved, thereby reducing maintenance costs and downtime.

[0030] Among them, the shape and size of the convex section 21 match the shape and size of the limiting groove 12, realizing the dual axial and circumferential positioning of the cutting blade 2, ensuring a good fixing effect, and no need for complex adjustments, further shortening the assembly and maintenance time, and reducing downtime costs.

[0031] The limiting groove 12 matches the convex section 21 to ensure that the position of the cutting blade 2 is accurate and the cutting width of the tobacco is uniform.

[0032] The spacing of the limiting grooves 12 matches the thickness of the shredding blades 2. This is accomplished simultaneously from one side during the machining of the roller shaft 1, ensuring uniform installation of all shredding blades 2 and minimizing the accumulation of machining errors. The uniform spacing between adjacent shredding blades 2 reduces friction and heat generation during operation, improving the heat dissipation performance and overall durability of the device, thereby extending its service life.

[0033] The fixed key bar 3 fills the space between the shredding blade 2 and the roller 1, forming a rigid fixing system. This prevents the shredding blade 2 from vibrating or loosening during high-speed rotation, enhancing assembly stability. This also reduces the use of spacer discs in traditional structures, lowering friction between components, reducing heat generation and energy consumption, and extending the equipment's service life.

[0034] A plurality of ridges 11 arranged along the axial direction of the roller shaft 1 form a ridge group. The roller shaft 1 is provided with a plurality of ridge groups along the circumferential direction. A keyway 13 is provided between adjacent ridge groups. The ridge section 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 the keyway 13, a clearance space is provided when the shredding blade 2 is assembled to the roller shaft 1, so that the convex section 21 of the inner ring of the shredding blade 2 can be moved axially along the roller shaft 1 to a position circumferentially opposite to the limiting groove 12 via the keyway 13, thereby avoiding the assembly difficulty caused by the obstruction of the ridge 11 of the roller shaft 1 when the shredding blade 2 is installed. At the same time, the cooperation between the keyway 13 and the ridge group forms an axial guide structure, so that the shredding blade 2 can be quickly positioned to the target limiting groove 12 through the keyway 13, simplifying the assembly process and reducing the axial insertion resistance and adjustment time. During assembly, the shredding blade 2 is inserted from one end of the roller shaft 1, and quickly moved to the corresponding limiting groove 12 under the guidance of the keyway 13, and then the shredding blade 2 is rotated to insert the convex section 21 from one end of the limiting groove 12, and the positioning is completed, thereby improving the installation efficiency.

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

[0037] The key groove 13 extends along the axial direction of the roller shaft 1 .

[0038] The width of the keyway 13 can be adapted to the width of the convex section 21 , thereby providing a good guiding effect.

[0039] The ridges 11 in each ridge group are aligned in the axial direction of the roller shaft 1 , and the ridge groups are evenly arranged in the circumferential direction of the roller shaft 1 so that the groove depth, groove width and groove length of each limiting groove 12 are the same.

[0040] A plurality of ribs 11 arranged axially along the roller shaft 1 form a rib group. Multiple rib groups are also arranged circumferentially around the roller shaft 1, ensuring uniform circumferential distribution of the rib groups. Keyways 13 between adjacent rib groups and retaining grooves 12 within the rib groups are also evenly spaced. This allows the inner ring convex section 21 of the shredding blade 2 to be inserted into the retaining groove 12, allowing circumferential forces to be symmetrically transferred to the roller shaft 1 through the evenly distributed rib groups. This prevents unilateral force concentration on the shredding blade 2, which could cause deflection. Axial loads are evenly borne by the aligned ribs 11 within the rib group, reducing localized stress concentration.

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

[0042] The length of the retaining groove 12 is the same as the length of the protruding section 21. The length of the protruding section 21 refers to the same length along the circumference of the roller shaft 1. When the protruding section 21 is inserted into the retaining groove 12, the two ends of the protruding section 21 are located at the two ends of the protruding section 21. One fixed key bar 3 faces one end of the retaining groove 12 and abuts one end of the protruding section 21. The other fixed key bar 3 faces the other end of the retaining groove 12 and abuts the other end of the protruding section 21. The two fixed key bars 3 securely retain the protruding section 21 within its corresponding retaining groove, achieving circumferential fixation.

[0043] The inner ring of the shredding blade 2 is provided with a concave section 22 that is recessed radially outward. When the convex section 21 is inserted into the limiting groove 12, the concave section 22 is arranged opposite to the keyway 13 to enclose an insertion space in which the fixed key strip 3 is inserted.

[0044] By making the insertion space enclosed by the concave section 22 and the keyway 13, a precise installation position can be provided for the fixed key strip 3. After the fixed key strip 3 is inserted, the convex section 21 of the shredding blade 2 can be firmly restricted in the limiting groove 12 in the circumferential direction of the roller shaft 1, preventing the shredding blade 2 from circumferentially moving or rotating during high-speed rotation. Combined with the axial limitation of the limiting groove 12, the shredding blade 2 can be dually fixed in the axial and circumferential directions, thereby improving the reliability of the position of the shredding blade 2 during the cutting process.

[0045] By making the insertion space enclosed by the concave section 22 and the keyway 13, a guide can also be provided for the assembly of the shredding blade 2. During installation, it is only necessary to align the convex section 21 of the shredding blade 2 with the limiting groove 12 and insert it, and rotate it until the concave section 22 is aligned with the keyway 13 to form an insertion space. No additional gap adjustment is required, which simplifies the installation steps of the fixed key strip 3.

[0046] When the convex section 21 is inserted into the limiting groove 12, the keyway 13 and the concave section 22 of the inner ring of the cutting blade 2 enclose an insertion space, and the fixed key strip 3 can be inserted into the space along the axial direction to firmly limit the convex section 21 in the limiting groove 12 in the circumferential direction, ensuring that the circumferential positioning of the cutting blade 2 is stable after assembly.

[0047] The shredding blade 2 is annular, specifically roughly annular. The convex section 21 and the concave section 22 are both arranged on the inner ring of the shredding blade 2. The convex section 21 protrudes toward the center of the circle along the radial direction of the shredding blade 2. The concave section 22 is recessed toward the outer ring side along the radial direction of the shredding blade 2.

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

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

[0050] There are multiple concave sections 22 and convex sections 21 . The concave sections 22 and the convex sections 21 are arranged alternately in the circumferential direction of the shredding blade 2 .

[0051] By arranging the concave sections 22 and the convex sections 21 alternately, the fixed key strip 3 can be evenly inserted into the insertion space enclosed by the key slot 13 and the concave sections 22 along the circumference of the cutting blade 2, forming multiple circumferential limit points, so that the cutting blade 2 is subjected to uniform circumferential force on the roller shaft 1, avoiding deflection or rotational torque caused by unilateral limitation, ensuring the stability of the cutting blade 2 during high-speed rotation, and improving the consistency of the tobacco cutting width.

[0052] As a feasible implementation manner, the number of the concave sections 22 and the number of the convex sections 21 are both four.

[0053] Specifically, the length of the concave section 22 in the circumferential direction of the shredding blade 2 may be equal to the length of the convex section 21 in the circumferential direction of the shredding blade 2 .

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

[0055] The end of the convex section 21 is in an arc transition.

[0056] By designing the end of the convex section 21 as a circular transition, stress concentration generated during assembly can be eliminated, reducing assembly resistance when the convex section 21 of the shredding blade 2 is inserted into the retaining groove 12 of the roller shaft 1, and avoiding wear of the convex section 21 or the retaining groove 12 due to hard contact. At the same time, the circular curved surface can reduce the friction coefficient of the contact surface with the roller shaft 1 when the shredding 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 strip 3 is adapted to the insertion space.

[0058] By adapting the cross-section of the fixed key bar 3 to the insertion space, a tight fit is ensured between the fixed key bar 3, the concave section 22 of the shredding blade 2, and the keyway 13 of the roller shaft 1, preventing circumferential movement of the shredding blade 2 due to gaps caused by dimensional deviations. The adapted cross-sectional shape completely fills the insertion space, effectively limiting the fixed key bar 3's circumferential position against the convex section 21 of the shredding blade 2, enhancing the positioning stability of the shredding blade 2. Furthermore, this tight fit reduces vibration-induced collisions and noise during high-speed operation, reduces component wear, and improves the operating accuracy and service life of the cutter roller assembly.

[0059] As a feasible implementation, 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 strip 3 and the insertion space to a matching fan-shaped structure, a tight extrusion limit can be formed on the convex section 21 of the cutting blade 2 in the circumferential direction of the roller shaft 1, preventing the cutting blade 2 from circumferentially moving or rotating due to the gap when rotating at high speed, ensuring the cutting position accuracy and avoiding uneven width of the tobacco.

[0061] The fan-shaped structure evenly distributes the force on the fixed key bar 3 across the curved wall of the insertion space, preventing stress concentration from causing key bar deformation or wear on the cutting blade 2. Furthermore, the tightly fitting fan-shaped cross-section reduces air turbulence and vibration noise during high-speed operation, improving the operational stability of the equipment.

[0062] The cross section of the fixed key bar 3 refers to the cross section perpendicular to the length direction, that is, the cross section perpendicular to the axial direction of the roller shaft 1. The projection of the insertion space on the plane where the cross section of the fixed key bar 3 lies matches the shape and size of the cross section.

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

[0064] By fixing the 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 escaping or shifting axially along the roller shaft 1, thereby improving the overall rigidity and operational reliability of the knife roller assembly.

[0065] The positioning ring 4 is connected to both ends of the roller shaft 1 through threads, and can quickly complete the axial locking of the fixed key bar 3.

[0066] The two symmetrically positioned positioning rings 4 clamp the fixed key bar 3 symmetrically, evenly distributing the axial load on both ends of the roller shaft 1. This prevents bending of the roller shaft 1 or deflection of the fixed key bar 3 due to unilateral force. Furthermore, the clamping force of the positioning rings 4 offsets the axial reaction force generated by the shredding blade 2 during cutting, reducing relative sliding wear between the fixed key bar 3 and the keyway 13 and concave section 22 of the shredding blade 2, thereby extending component service life.

[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 impact resistance and long-term stability of the equipment.

[0068] The knife roller assembly includes a plurality of shredding blades 2 . The sizes and / or shapes of the different shredding blades 2 are different. The different shredding blades 2 can be interchangeably arranged on the roller shaft 1 .

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

[0070] Among them, different types of slicing blades 2 may have different widths, cutting edge angles, etc.

[0071] The roller shaft 1 is a rotary shaft, and can be manufactured by integral processing or segmented combination according to the equipment size requirements. Integral processing is more suitable for conventional lengths, and segmented combination is more suitable for longer sizes.

[0072] In Example 1, Figure 4 As shown, the roller shaft 1 is formed as an integral body, that is, it is manufactured by integral processing.

[0073] The roller shaft 1 is processed as a whole and is suitable for knife roller assemblies of conventional lengths. That is, the roller shaft 1 is processed as a whole into one, and four truncated fan-shaped keyways 13 are evenly arranged along the circumference on the surface, and the surface is also provided with equally spaced limiting grooves 12.

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

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

[0076] The installation process of the knife roller assembly is as follows:

[0077] For integrally processed roller shafts 1, the integral roller shaft 1 is directly installed in the equipment. For segmented roller shafts 1, each shaft segment 5 is first installed in place in sequence, and then assembled into a whole through high-precision threaded connections, positioning pins and lock nuts.

[0078] Next, insert the cutting blades 2 one by one from one end of the roller shaft 1, aligning the convex section 21 of the inner ring of the cutting blade 2 with the corresponding limiting groove 12. Once the cutting blade 2 reaches the target position, rotate the cutting blade 2 so that the concave section 22 inserts into the keyway 13. Simultaneously, the convex section 21 engages the limiting groove 12, completing the positioning. After all cutting blades 2 are installed, insert the fixed key bar 3 axially to fill the gap in the keyway 13 and restrict the rotation of the cutting blade 2. Finally, install the threaded positioning ring 4 at both ends of the roller shaft 1, locking the fixed key bar 3 and the entire assembly to ensure stable operation of the cutter roller assembly.

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

[0080] After the equipment is started, the cutter roller assembly rotates at high speed, and the shredder blades 2 precisely cut the tobacco leaves. Whether the roller shaft 1 is machined as a whole or constructed in sections, the installation spacing of the shredder blades 2 is uniform, effectively reducing friction and heat generation, thereby improving cutting efficiency and equipment durability. Specifically, the integrally machined roller shaft 1 ensures structural accuracy thanks to its one-piece molding properties. The segmented roller shaft 1 relies on high-precision threaded connections, locating pins, and locking nuts to ensure that each shaft segment 5 is securely connected and coaxial as a whole, maintaining the long-term high-precision operation of the cutter roller assembly.

[0081] In a second aspect of the present application, a tobacco double-roller shredder is provided, comprising the blade roller assembly as described above.

[0082] The present invention provides a knife roller assembly and a tobacco roller cutter. By optimizing the structural design of the cutting blade 2, the roller shaft 1, the fixed key bar 3 and the positioning ring 4, the processing error is effectively reduced, the cutting accuracy is improved, the equipment wear is reduced, and the installation and maintenance efficiency are improved. The present invention has a wide range of application value and can be used in various tobacco processing equipment to improve the tobacco cutting quality and improve production efficiency.

[0083] The present invention provides a blade roller assembly and a tobacco roller cutter. By employing a combined design of an annular cutting blade 2, a flexible roller shaft 1 manufacturing solution, a fan-shaped fixed key bar 3, and a threaded positioning ring 4, the assembly significantly improves the positioning accuracy and cutting quality of the cutting blade 2 and provides a segmented, combined roller shaft 1 for long dimensions. The segmented roller shaft 1 utilizes a high-precision threaded connection structure, supplemented by a locating pin and a locking nut, ensuring a secure connection and overall coaxiality between the shaft segments 5. This solves the problems of difficult overall machining and error accumulation associated with long roller shafts 1, reduces equipment energy consumption, extends service life, and simplifies maintenance, resulting in widespread industrial application.

[0084] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0085] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A knife roller assembly, characterized in that: The invention comprises a roller shaft (1), a shredding blade (2) and a fixed key bar (3), wherein a plurality of ridges (11) are provided on the outer peripheral wall of the roller shaft (1), and the plurality of ridges (11) extend along the circumference of the roller shaft (1) and are arranged along the axial direction to form a limiting groove (12) between adjacent ridges (11); the shredding blade (2) is sleeved on the outer peripheral side of the roller shaft (1); a convex section (21) protruding radially inward is provided on the inner ring of the shredding blade (2); the convex section (21) is inserted into the limiting groove (12) so that the limiting groove (12) forms a limit for the convex section (21) in the axial direction of the roller shaft (1); the fixed key bar (3) is inserted between the shredding 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 convex section (21) in the limiting groove (12).

2. The knife roller assembly according to claim 1, characterized in that: The plurality of ridges (11) arranged along the axial direction of the roller shaft (1) form a ridge group, the roller shaft (1) is provided with a plurality of ridge groups along the circumferential direction, keyways (13) are provided between adjacent ridge groups, and the convex section (21) can be moved along the axial direction of the roller shaft (1) via the keyways (13) to be opposite to the limiting groove (12) in the circumferential direction of the roller shaft (1).

3. The knife roller assembly according to claim 2, characterized in that: The ridges (11) in each ridge group are aligned in the axial direction of the roller shaft (1), and each ridge group is evenly arranged in the circumferential direction of the roller shaft (1), so that the groove depth, groove width and groove length of each of the formed limiting grooves (12) are the same.

4. The knife roller assembly according to claim 2, characterized in that: The inner ring of the shredding blade (2) is provided with a concave section (22) that is recessed radially outwards. When the convex section (21) is inserted into the limiting groove (12), the concave section (22) and the key groove (13) are arranged opposite to each other to enclose an insertion space. The fixed key bar (3) is inserted into the insertion space. The number of the concave sections (22) and the number of the convex sections (21) are both plural, and the concave sections (22) and the convex sections (21) are arranged alternately in the circumferential direction of the shredding blade (2).

5. The knife roller assembly according to claim 1, characterized in that: The end of the convex section (21) is in an arc transition.

6. The knife roller assembly according to claim 4, characterized in that: The cross section of the fixed key strip (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 knife roller assembly according to claim 1, characterized in that: The knife roller assembly comprises two positioning rings (4), and the two positioning rings (4) are respectively fixedly arranged at both ends of the roller shaft (1) to clamp and fix the fixed key strip (3) inside in the axial direction of the roller shaft (1).

8. The knife roller assembly according to claim 1, characterized in that: The knife roller assembly comprises a plurality of the shredding blades (2), and the sizes and / or shapes of the different shredding blades (2) are different. The different shredding blades (2) can be interchangeably arranged on the roller shaft (1).

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

10. A tobacco roller cutting machine, characterized in that: The utility model comprises a knife roller assembly as described in any one of claims 1 to 9.

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