Horizontal multi-stage tobacco cutting machine
The design of the horizontal multi-segment tobacco leaf cutter solves the problems of tobacco leaf overlap and unadjustable cutting length, achieving efficient and stable tobacco leaf cutting to meet diverse processing needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG TOBACCO REDRYING CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-06-09
AI Technical Summary
The existing tobacco leaf unbundling machine uses a one-cut-two-slit structure, which leads to frequent overlap of tobacco leaves, makes it impossible to adjust the cutting length, and affects product quality and equipment flexibility.
The horizontal multi-segment tobacco leaf cutter uses two sets of cutting units and an adjustable cutter combination to ensure complete cutting of tobacco leaves. The cutting length is adjustable, and stable cutting is achieved by combining the feeding rod and the braking air chamber.
It achieves a tobacco leaf cutting rate of up to 98%, meeting different processing needs, improving processing quality and efficiency, and reducing noise and energy consumption.
Smart Images
Figure CN224330333U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of tobacco processing equipment, specifically relating to a horizontal multi-segment tobacco leaf cutting machine. Background Technology
[0002] Existing tobacco leaf unbundling machines mostly employ a two-blade structure for the cutting section, with its core components being a fixed upper and lower circular blade that together form the cutting edge to cut the tobacco leaves. However, this traditional structure has several technical drawbacks. In actual operation, when tobacco leaves are conveyed from the leaf-laying belt to the blade, overlap is very likely to occur. Overlapping leaves create gaps between the blades as they pass through, resulting in some leaves not being completely cut, thus affecting product quality. Furthermore, because the installation positions of the upper and lower circular blades are fixed and cannot be adjusted, the cutting length of the tobacco leaves cannot be changed. This significantly limits the flexibility and applicability of the equipment, making it difficult to meet the diverse requirements of different processing techniques for tobacco leaf cutting length. Therefore, developing a tobacco leaf cutting machine that can effectively solve the above problems is particularly necessary. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a horizontal multi-segment tobacco leaf cutting machine. This machine can adjust the cutting length of the tobacco leaves to meet production needs. Furthermore, it boasts a high cutting rate, effectively improving processing quality and efficiency.
[0004] The technical solution adopted by this utility model is as follows: a horizontal multi-segment tobacco leaf cutter, which consists of two sets of cutting units. The cutting unit includes a support bearing, a front cutting blade assembly, a cutting machine frame, a linear bearing, a rear cutting blade assembly, a feeding rod, a rear cutting blade moving bracket, a brake chamber sliding bracket, a brake chamber, a connecting rod, a rear cutting blade drive motor, a front cutting blade drive motor, and a cutting machine frame.
[0005] The front cutting blade assembly includes a cutting shaft, a small clamping mechanism, a shaft spacer, a first clamping blade, a small circular cutter, and a second clamping blade. The small clamping mechanism, shaft spacer, first clamping blade, small circular cutter, and second clamping blade are sequentially mounted on the cutting shaft. The cutting shaft has a long keyway. The small clamping mechanism is keyed to the cutting shaft, with one end abutting against the end face of the shaft shoulder and the other end abutting against the end face of the shaft spacer. The small circular cutter is mounted on the cutting shaft via a key and is clamped by the first and second clamping blades and then fixed by bolts. The first and second clamping blades are abutted against the cutting shaft by locking screws. The number of small circular cutters is at least three.
[0006] The rear cutting blade assembly includes a cutting shaft, a large clamping mechanism, a shaft spacer, a first clamping blade, a large circular cutter, and a second clamping blade. The large clamping mechanism, shaft spacer, first clamping blade, large circular cutter, and second clamping blade are sequentially mounted on the cutting shaft. The large clamping mechanism is keyed to the cutting shaft, with one end abutting against the end face of the shaft shoulder and the other end abutting against the end face of the shaft spacer. The large circular cutter is mounted on the cutting shaft via a key and is clamped by the first and second clamping blades and then fixed by bolts. The first and second clamping blades are abutted against the cutting shaft by locking screws. The number of large circular cutters is at least three.
[0007] The cutting shaft of the front cutting blade assembly is mounted on the cutting machine frame via a support bearing. The cutting shaft is connected to the output shaft of the front cutting blade drive motor. The cutting machine frame is welded onto the cutting machine stand to form an integral frame. The front cutting blade drive motor is mounted on the cutting machine stand via a motor bracket.
[0008] The cutting shaft of the rear cutter assembly is mounted on a support connected to a linear bearing via a support bearing. This cutting shaft is connected to the output shaft of the rear cutter drive motor, which is also mounted on the support connected to the linear bearing. The linear bearing is mounted on the cutter frame. The small clamping mechanism and small circular cutter of the assembled front cutter assembly correspond to the large clamping mechanism and large circular cutter of the rear cutter assembly. The rear cutter moving bracket is welded to the support of the linear bearing and is connected to the brake chamber sliding bracket via a connecting rod. The brake chamber sliding bracket is connected to the brake chamber pull rod, and the brake chamber is mounted on the cutter frame.
[0009] The material guide bar is located on the rear side of the rear cutter assembly and is fixed to the front end of the brake chamber sliding bracket. Material guide bars are evenly distributed between two adjacent large circular cutters and between the large circular cutter and the large clamping machine.
[0010] Furthermore, the horizontal multi-stage tobacco leaf cutter also includes a belt conveyor located at the front end of the front cutting blade assembly, and the belt conveyor is mounted on the cutter frame.
[0011] Furthermore, the two sets of cutting units are symmetrically arranged on the cutting machine frame.
[0012] Furthermore, the small clamping machine and the large clamping machine are located on the side close to the drive motor. The small clamping machine and the large clamping machine are respectively connected to the cutter shaft through A-type keys embedded in the keyway. There are 4 fixing bolts between the first clamping blade and the second clamping blade, which are evenly distributed around the circumference. Washer assemblies are fitted on the bolts. The first clamping blade and the second clamping blade are fixed to the cutter shaft by at least 3 tapered locking screws.
[0013] Furthermore, the number of small circular cutters and large circular cutters on the cutter shaft are three each.
[0014] Furthermore, the cutting machine frame is equipped with a protective plate or a protective cover with windows.
[0015] Furthermore, a baffle is installed at the front end of the brake chamber. Furthermore, the non-conical cutting edges of the large and small circular cutters form a shearing opening at the rear.
[0016] Furthermore, the size of the large circular cutter is larger than that of the small circular cutter, and the size of the large clamping machine is larger than that of the small clamping machine.
[0017] Furthermore, the braking chamber uses compressed air as power to provide a certain horizontal forward thrust to the rear cutting blade assembly, ensuring that the tobacco leaves are completely cut.
[0018] Furthermore, the circular cutter, once clamped by the blade holder, effectively prevents blade deviation during shearing.
[0019] Furthermore, the output shafts of the front cut-off blade drive motor and the rear cut-off blade drive motor rotate inward relative to each other.
[0020] Furthermore, the material guide bar is located on the discharge side of the front and rear cutting blade groups, maintaining a corresponding distance from the blade edges of the blade groups.
[0021] Furthermore, the cutter assembly employs a combination of large and small circular cutters, arranged horizontally front and back, with three cutters on each side forming three cutting edges. This effectively avoids gaps between the cutting edges caused by overlapping tobacco leaves, ensuring thorough cutting. The large and small circular cutters are slidably mounted on the cutter shaft using a continuous keyway, forming a high-precision fit with the circular cutter clamping plate. This allows for stepless axial positioning of the circular cutters, and the distance between adjacent circular cutters can be adjusted according to different tobacco leaf cutting lengths to meet processing needs. Adjusting the distance simply requires loosening the set screws securing the clamping blades, allowing the circular cutters to slide axially and adjust the blade spacing. The adjustment is quick and precise; the entire process requires no disassembly of the cutter shaft or replacement of the clamps. Simply loosen the clamping plate, slide the circular cutter along the keyway to the target size, and then re-tighten it. This significantly reduces cutter change and machine setup time, thereby achieving precise control over the tobacco leaf cutting length.
[0022] Furthermore, the continuous keyway on the cutter shaft also has a dual guiding function, ensuring that the circular cutter always maintains coaxiality with the spindle when rotating at high speed, and effectively transmitting torque, suppressing lateral displacement and vibration, thereby significantly improving cutting accuracy and blade life.
[0023] Furthermore, the addition of a feeding rod further improves the working efficiency and stability of the cutting machine, ensuring that the tobacco leaves can pass through the cutting mechanism evenly and smoothly.
[0024] The beneficial effects of this utility model are as follows: This utility model provides a horizontal multi-segment tobacco leaf cutter. The cutting length of this cutter can be flexibly adjusted according to production needs, thereby meeting the processing requirements of products of different specifications. Furthermore, the cutting effect is significant, with a cutting rate exceeding 98%. The cutter exhibits strong stability, low noise, and effective energy consumption control during operation. Compared with existing unbundling or cutting machines, when cutting whole tobacco leaves, it can precisely cut the leaves according to preset length requirements, effectively improving the quality and efficiency of tobacco processing and meeting diverse processing technology requirements. Attached Figure Description
[0025] Figure 1 This is a top view of the horizontal multi-segment tobacco leaf cutter in Embodiment 1.
[0026] Figure 2 yes Figure 1 A magnified view of part I, showing the spatial positions of the large and small circular cutters.
[0027] Figure 3 This is a schematic diagram of the front cutting blade assembly in Embodiment 1.
[0028] Figure 4 This is a three-dimensional structural schematic diagram of the front cutting blade assembly in Embodiment 1.
[0029] Figure 5 This is a schematic diagram of the front view structure of the rear cutting blade assembly in Embodiment 1.
[0030] Figure 6 This is a three-dimensional structural schematic diagram of the rear cutting blade assembly in Embodiment 1.
[0031] Figure 7 This is a side view of the horizontal multi-segment tobacco leaf cutter in Example 2.
[0032] In the diagram, 1. Support bearing, 2. Front cutter assembly, 3. Cutter frame, 4. Linear bearing, 5. Rear cutter assembly, 6. Feeding rod, 7. Rear cutter moving bracket, 8. Brake chamber sliding bracket, 9. Brake chamber, 10. Connecting rod, 11. Rear cutter drive motor, 12. Front cutter drive motor, 13. Cutter frame, 14. Belt conveyor, 21. Cutter shaft, 22. Small clamping device, 23. Shaft spacer, 24. First clamping blade, 25. Small circular cutter, 26. Second clamping blade, 52. Large clamping device, 55. Large circular cutter. Detailed Implementation
[0033] Example
[0034] Referring to the figures, a horizontal multi-segment tobacco leaf cutter is provided. The horizontal multi-segment tobacco leaf cutter consists of two cutting units. Each cutting unit includes a support bearing 1, a front cutting blade assembly 2, a cutting machine frame 3, a linear bearing 4, a rear cutting blade assembly 5, a feeding rod 6, a rear cutting blade moving bracket 7, a brake chamber sliding bracket 8, a brake chamber 9, a connecting rod 10, a rear cutting blade drive motor 11, a front cutting blade drive motor 12, and a cutting machine frame 13.
[0035] The front cutting blade assembly includes a cutting shaft 21, a small clamping mechanism 22, a shaft spacer 23, a first clamping blade 24, a small circular cutter 25, and a second clamping blade 26. The small clamping mechanism, shaft spacer, first clamping blade, small circular cutter, and second clamping blade are sequentially mounted on the cutting shaft. The cutting shaft has a long keyway. The small clamping mechanism is keyed to the cutting shaft, with one end abutting against the end face of the shaft shoulder and the other end abutting against the end face of the shaft spacer. The small circular cutter is mounted on the cutting shaft by a key and is clamped by the first and second clamping blades and then fixed by bolts. The first and second clamping blades abut against the cutting shaft by locking screws. There are at least three small circular cutters.
[0036] The rear cutter assembly includes a cutter shaft 21, a large clamping mechanism 52, a shaft spacer 23, a first clamping blade 24, a large circular cutter 55, and a second clamping blade 26. The large clamping mechanism, shaft spacer, first clamping blade, large circular cutter, and second clamping blade are sequentially mounted on the cutter shaft. The large clamping mechanism is keyed to the cutter shaft, with one end abutting against the end face of the shaft shoulder and the other end abutting against the end face of the shaft spacer. The large circular cutter is mounted on the cutter shaft via a key and is clamped by the first and second clamping blades and then fixed by bolts. The first and second clamping blades abut against the cutter shaft via locking screws. There are at least three large circular cutters.
[0037] The cutting shaft of the front cutting blade assembly is mounted on the cutting machine frame via a support bearing. The cutting shaft is connected to the output shaft of the front cutting blade drive motor. The cutting machine frame is welded onto the cutting machine stand to form an integral frame. The front cutting blade drive motor is mounted on the cutting machine stand via a motor bracket.
[0038] The cutting shaft of the rear cutter assembly is mounted on a support connected to a linear bearing via a support bearing. This cutting shaft is connected to the output shaft of the rear cutter drive motor, which is also mounted on the support connected to the linear bearing. The linear bearing 4 is mounted on the cutter frame. The small clamping mechanism and small circular cutter of the assembled front cutter assembly correspond to the large clamping mechanism and large circular cutter of the rear cutter assembly. The rear cutter moving bracket is welded to the support of the linear bearing and is connected to the brake chamber sliding bracket via a connecting rod. The brake chamber sliding bracket is connected to the brake chamber pull rod, and the brake chamber is mounted on the cutter frame.
[0039] The feeding rod is located at the rear of the rear cutting blade assembly and is fixed to the front end of the brake chamber sliding bracket. Feeding rods are distributed between adjacent large circular cutters and between the large circular cutters and the large clamping mechanism. The feeding rod is mainly used to remove tobacco leaves between the two large circular cutters, allowing the cut tobacco leaves to fall quickly onto the collection belt. The feeding rod is a fixed design, but it moves back and forth with the brake chamber sliding bracket.
[0040] Two sets of cutting units are symmetrically arranged on the cutting machine frame. The small clamping unit and the large clamping unit are located on the side closer to the drive motor. The small clamping unit and the large clamping unit are connected to the cutting shaft via A-type keys embedded in keyways. There are four fixing bolts between the first and second clamping blades, evenly distributed around the circumference. Washer assemblies are fitted on the bolts. The first and second clamping blades are fixed to the cutting shaft by four tapered locking screws. There are three small circular cutters and three large circular cutters on the cutting shaft. The cutting machine frame is equipped with a protective plate or a protective cover with windows. A baffle is installed at the front end of the brake chamber.
[0041] Example
[0042] Based on the technical solution of Embodiment 1, a horizontal multi-segment tobacco leaf cutter further includes a belt conveyor 14 disposed at the front end of the front cutting blade assembly. The belt conveyor is installed on the cutter frame and is used to transfer tobacco leaves to the cutter.
[0043] Each cutting machine consists of two cutting units, with a total of four cutting blade assemblies (two front cutting blade assemblies and two rear cutting blade assemblies), each driven by an independent geared motor. The front cutting blade assemblies are fixedly installed, while the rear cutting blade assemblies, driven by a brake chamber and supported by linear bearings, can move horizontally back and forth. This ensures proper blade clearance between the small circular cutters of the front and rear cutting blades, preventing collisions and blade damage. The brake chambers, powered by compressed air, consistently provide a sustained horizontal forward thrust to the rear cutting blade assemblies, ensuring complete cutting of the tobacco leaves. A clamping mechanism on the blade shaft assists in the horizontal entry of the tobacco leaves into the shearing opening.
[0044] During the tobacco leaf cutting process, tobacco leaves are conveyed to the cutting machine via a belt conveyor. As the leaves are guided to the shearing opening, the front cutting blade assembly rolls them there, while a clamping mechanism assists in horizontally entering the opening to ensure precise cutting. After entering the shearing opening, the front and rear cutting blade assemblies rotate relative to each other, forming a shearing opening at the intersection of the two circular cutters. Two opposing rotational shearing forces then cut the tobacco leaves. To improve cutting quality, if overlapping of incoming tobacco leaves leads to insufficient gripping force, the brake chamber is activated. This causes the rear cutting blade assembly and the rear drive motor to move along a linear bearing, propelling the rear cutting blade assembly horizontally forward. This, in turn, moves the large circular cutter forward to cut the leaves completely. The linear bearing improves the horizontal positioning accuracy of the rear cutting blade assembly during sliding, preventing blade collisions.
[0045] Example
[0046] Based on the technical solutions of Embodiments 1 and 2, the cutter shaft is made of high-strength alloy steel (such as 40Cr), and its surface is treated with high-frequency quenching, achieving a hardness of HRC50 or higher. Both ends are supported by bearings with mounting seats to ensure smooth rotation. The cutter shaft has a continuous keyway (10mm wide, 5mm deep), which provides torque transmission for the circular cutter and also provides radial guidance, suppressing vibration during high-speed rotation and ensuring coaxiality ≤0.05mm. Each cutting unit's cutter assembly includes three large circular cutters and three small circular cutters. The large circular cutters have a diameter of Φ200mm, and the small circular cutters have a diameter of Φ150mm, both made of cemented carbide (such as YG8), with precision-ground cutting edges achieving a sharpness Ra≤0.4μm. The cutters are symmetrically mounted horizontally on the cutter shaft, forming three cutting edges. This combination of large and small circular cutters eliminates cutting blind spots caused by overlapping tobacco leaves. The circular cutter (4) forms a high-precision fit with the keyway of the cutter shaft through the clamping plate (clamping blade). After the clamping plate is released, the circular cutter can slide to any position along the keyway axis. The target size (such as 20–100 mm) is positioned by the scale. After locking, the cutting length adjustment is completed, achieving stepless adjustment of 5–100 mm. A split clamping plate is adopted, which is locked by a hydraulic nut. When adjusting, the circular cutter can be slid by loosening the nut. The positioning accuracy is ±0.1 mm. When locking, the hydraulic nut applies a preload of 30-50 kN to ensure that the circular cutter does not loosen when rotating at high speed. This quick-release design does not require disassembling the cutter shaft, reducing the tool change time by 70%.
[0047] The combination of large and small circular cutters and the material guide bar design eliminates gap problems caused by overlapping tobacco leaves, achieving a cutting integrity rate of ≥98%. A continuous keyway allows for stepless adjustment of the cutting length (5–100mm), and the number of tobacco leaf cutting segments can be increased or decreased according to customer requirements to meet different processing needs for tobacco-containing materials. The self-lubricating bearing has a maintenance cycle of ≥2000 hours. The keyway's dual guidance extends blade life by 40% and reduces vibration amplitude by 60%, ensuring stability during high-speed operation.
Claims
1. A horizontal multi-segment tobacco leaf cutting machine, characterized in that: The horizontal multi-segment tobacco leaf cutter consists of two cutting units. Each cutting unit includes a support bearing, a front cutting blade assembly, a cutting machine frame, a linear bearing, a rear cutting blade assembly, a feeding rod, a rear cutting blade moving bracket, a brake chamber sliding bracket, a brake chamber, a connecting rod, a rear cutting blade drive motor, a front cutting blade drive motor, and a cutting machine frame. The front cutting blade assembly includes a cutting shaft, a small clamping mechanism, a shaft spacer, a first clamping blade, a small circular cutting blade, and a second clamping blade. The small clamping mechanism, shaft spacer, first clamping blade, small circular cutting blade, and second clamping blade are sequentially mounted on the cutting shaft. The cutting shaft has a long keyway. The small clamping mechanism is keyed to the cutting shaft, with one end abutting against the end face of the shaft shoulder and the other end abutting against the end face of the shaft spacer. The small circular cutting blade is mounted on the cutting shaft via a key and is clamped by the first and second clamping blades and then fixed by bolts. The first and second clamping blades are abutted against the cutting shaft by locking screws. The number of small circular cutting blades is at least three. The rear cutting blade assembly includes a cutting shaft, a large clamping mechanism, a shaft spacer, a first clamping blade, a large circular cutting blade, and a second clamping blade. The large clamping mechanism, shaft spacer, first clamping blade, large circular cutting blade, and second clamping blade are sequentially mounted on the cutting shaft. The large clamping mechanism is keyed to the cutting shaft, with one end abutting against the end face of the shaft shoulder and the other end abutting against the end face of the shaft spacer. The large circular cutting blade is mounted on the cutting shaft via a key and is clamped by the first and second clamping blades and then fixed by bolts. The first and second clamping blades are abutted against the cutting shaft by locking screws. The number of large circular cutting blades is at least three. The cutting shaft of the front cutting blade assembly is mounted on the cutting machine frame via a support bearing. The cutting shaft is connected to the output shaft of the front cutting blade drive motor. The cutting machine frame is welded to the cutting machine frame, and the front cutting blade drive motor is mounted on the cutting machine frame via a motor bracket. The cutting shaft of the rear cutting blade assembly is mounted on a support connected to a linear bearing via a support bearing. The cutting shaft is connected to the output shaft of the rear cutting blade drive motor, which is mounted on the support connected to the linear bearing. The linear bearing is mounted on the cutting machine frame. The small clamping machine and small circular cutter of the assembled front cutting blade assembly correspond to the large clamping machine and large circular cutter of the rear cutting blade assembly. The rear cutting blade moving bracket is welded to the support of the linear bearing and is connected to the brake chamber sliding bracket via a connecting rod. The brake chamber sliding bracket is connected to the pull rod of the brake chamber, and the brake chamber is mounted on the cutting machine frame. The material guide bar is located on the rear side of the rear cutter assembly and is fixed to the front end of the brake chamber sliding bracket. Material guide bars are evenly distributed between two adjacent large circular cutters and between the large circular cutter and the large clamping machine.
2. The horizontal multi-segment tobacco leaf cutter according to claim 1, characterized in that: The horizontal multi-stage tobacco leaf cutter also includes a belt conveyor located at the front end of the front cutting knife assembly, which is mounted on the cutter frame.
3. The horizontal multi-segment tobacco leaf cutter according to claim 1 or 2, characterized in that: Two sets of cutting units are symmetrically arranged on the cutting machine frame.
4. The horizontal multi-segment tobacco leaf cutter according to claim 1 or 2, characterized in that: The small clamping machine and the large clamping machine are located on the side close to the drive motor. The small clamping machine and the large clamping machine are respectively connected to the cutter shaft through an A-type key embedded in the keyway. There are 4 fixing bolts between the first clamping blade and the second clamping blade, which are evenly distributed around the circumference. Washer assemblies are fitted on the bolts. The first clamping blade and the second clamping blade are fixed to the cutter shaft by at least 3 tapered locking screws.
5. The horizontal multi-segment tobacco leaf cutter according to claim 1 or 2, characterized in that: The cutter shaft has three small circular cutters and three large circular cutters.
6. The horizontal multi-segment tobacco leaf cutter according to claim 1 or 2, characterized in that: The cutting machine frame is equipped with a protective plate or a protective cover with windows.
7. The horizontal multi-segment tobacco leaf cutter according to claim 1 or 2, characterized in that: A baffle is installed at the front end of the brake chamber.