A knife gate height adjustment device and method

Abstract

This application relates to the technical field of tobacco production equipment, and discloses a knife gate height adjustment device and method for installation inside a shredder. The shredder has a conveying channel with a first conveyor belt inside, and cutters are spaced apart on the discharge end of the first conveyor belt. The knife gate height adjustment device is located between the discharge end of the first conveyor belt and the cutters. It includes: a first telescopic frame, a second telescopic frame, and a knife gate component. The first telescopic frame is rotatably connected to a roller at one end of the first conveyor belt, and the first telescopic frame can drive the roller to telescopically move. The second telescopic frame is installed on the first telescopic frame and can telescopically move relative to the first telescopic frame. The knife gate component is fixedly installed on the telescopic end of the second telescopic frame. The double-layer telescopic structure of the first and second telescopic frames provides higher adjustment accuracy and more convenient operation compared to the traditional method of manually adding or removing shims or rotating bolts, eliminating the need for operator experience and judgment.

Description

Technical Field

[0001] This application relates to the field of tobacco production equipment technology, and specifically to a knife gate height adjustment device and method. Background Technology

[0002] The shredder is a key piece of equipment in shredding production, and its blade structure directly affects the compaction and cutting effect of the material. In the shredder, the first conveyor belt (such as the upper chain) and the second conveyor belt (such as the lower chain) work together to transport the material to the cutter. The blade and the conveyor belt work together to apply a certain amount of pressure to the material to ensure that the cutter can cut the material evenly.

[0003] However, during the production process of a shredder, the required pressure and cutting force vary depending on the material structure or material (such as cutting tobacco sheets, stems, leaves, etc.). When the material characteristics change, if the blade height cannot be adjusted accordingly, the following problems may occur: Firstly, insufficient pressure prevents the material from being fully compacted within the conveying channel, leading to material slippage, strip running, or skein agglomeration during cutting, resulting in uneven shred width and poor cutting performance. Secondly, excessive pressure over-compresses the material, potentially damaging its original structure and affecting the quality of the finished shreds. Traditional knife gate height adjustment methods rely heavily on manual operation, with operators adjusting by rotating bolts or adding / removing shims. This not only requires machine downtime but also relies on operator experience for accuracy, resulting in time-consuming, inefficient, and inconsistent shred quality. Summary of the Invention

[0004] This application provides a knife gate height adjustment device and method, which aims to solve the above-mentioned problems.

[0005] In one embodiment, a knife gate height adjustment device is provided for installation inside a shredder. The shredder has a conveying channel with a first conveyor belt installed within it. Cutting blades are spaced apart on the discharge end of the first conveyor belt. The knife gate height adjustment device is located between the discharge end of the first conveyor belt and the cutting blades. The device includes: A first telescopic frame is used to rotatably connect with a roller at one end of the first conveyor belt, and the first telescopic frame can drive the roller to telescopically move. The second telescopic frame is mounted on the first telescopic frame and can telescopically move relative to the first telescopic frame; The knife door component is fixedly installed on the telescopic end of the second telescopic frame.

[0006] The first conveyor belt is located at the top of the conveying channel, and one roller of the first conveyor belt is located at the outlet of the conveying channel. The first telescopic frame can drive the roller to telescopically move towards the center of the cross-section of the outlet of the conveying channel to change the size of the outlet.

[0007] A second conveyor belt is installed in the conveying channel, and the second conveyor belt is spaced apart from the first conveyor belt. The conveying channel extends horizontally, and the first and second conveyor belts are arranged at intervals in the vertical direction, that is, located on the upper and lower end faces of the conveying channel.

[0008] In one embodiment, the first telescopic frame includes a fixed rod, a drive cylinder, and a first lifting rod; the fixed rod is fixedly connected to the shredder; the drive cylinder is fixedly connected to the fixed rod; the first lifting rod is fixedly connected to the telescopic end of the drive cylinder; the first lifting rod is rotatably connected to the roller; and the second telescopic frame is fixedly connected to the first lifting rod.

[0009] In one embodiment, the second telescopic frame includes a platform, a drive motor, and a second lifting rod; the platform is fixedly connected to the first lifting rod; the drive motor is fixedly connected to the platform, the second lifting rod is movably connected to the platform, and the second lifting rod can move up and down relative to the platform; the drive motor is drively connected to the second lifting rod; the knife gate is fixedly connected to one end of the lifting rod; the knife gate is spaced apart from the roller.

[0010] In one embodiment, the output end of the drive motor is engaged with a drive gear; the drive gear is rotatably connected to the platform; the second lifting rod passes through the drive gear and is threadedly connected to the drive gear; the second lifting rod can rotate relative to the drive gear.

[0011] Specifically, the output end of the drive motor meshes with the drive gear using helical gears to change the direction of power transmission.

[0012] The output end of the drive motor meshes with the drive gear using a worm gear transmission, meaning that a worm is fixedly connected to the output end of the drive motor, and the drive gear is a worm.

[0013] In one embodiment, a guide rod is movably mounted on the platform; the guide rod is fixedly connected to the knife door component; and the guide rod is arranged parallel to the second lifting rod.

[0014] In one embodiment, the platform includes a connecting rod and a platform plate; the connecting rod is fixedly connected to the first lifting rod; the platform plate is fixedly connected to the connecting rod; the drive motor is fixedly connected to the platform plate; the drive gear is rotatably connected to the platform plate; and both the guide rod and the second lifting rod move through the platform plate.

[0015] In one embodiment, the knife gate component includes a connecting seat and a pressure block; the second lifting rod and the guide rod are both fixedly connected to the connecting seat; the pressure block is detachably connected to the connecting seat; the pressure block has a pressing surface for contacting tobacco shreds within the conveying channel; the pressing surface is inclined and parallel to the conveying direction of the first conveyor belt.

[0016] Specifically, both the second lifting rod and the guide rod are fixedly connected to the connecting seat by bolts.

[0017] In one embodiment, the pressure block has a slot for the connecting seat to be engaged; the inner wall of the slot has a threaded hole; the connecting seat is engaged in the slot and then connected by bolts.

[0018] In one embodiment, there are two second lifting rods, each rotatably connected to one end of the roller; both second lifting rods are fixedly connected to the carrying plate.

[0019] Specifically, there are two drive cylinders, and the two drive rods are connected to the two second lifting rods one by one.

[0020] The number of guide rods is multiple, and the multiple guide rods are arranged at intervals on the connecting seat.

[0021] In one solution, another method for adjusting the knife gate height is provided, including the following steps: S1. Adjust the amount of extension of the first telescopic frame towards the center of the cross-section of the conveying channel outlet according to the required pressure at the outlet of the conveying channel, so as to adjust the pressure of the roller at one end of the first conveyor belt on the tobacco leaves and / or tobacco stems in the outlet of the conveying channel. S2. Adjust the amount of extension of the second telescopic frame towards the center of the cross-section of the conveying channel outlet to adjust the pressure of the knife gate component on the tobacco leaves and / or tobacco stems in the conveying channel outlet.

[0022] The beneficial effects of this application are: The first telescopic frame drives the rollers at the outlet of the conveyor channel to extend and retract, changing the outlet size and thus adjusting the material accumulation thickness at the outlet. Simultaneously, the second telescopic frame drives the knife gate to extend and retract, independently adjusting the pressure of the knife gate on the material. Together, these two mechanisms allow for flexible adjustment of pressure and cutting forces according to the characteristics of different materials such as tobacco sheets, stems, and leaves, improving the shredder's adaptability to various materials and preventing downtime and material shortages caused by mismatched pressure or cutting forces.

[0023] The double-layer telescopic structure of the first and second telescopic frames provides higher adjustment accuracy and is more convenient to operate compared to the traditional method of manually adding or removing shims or rotating bolts, without relying on the operator's experience and judgment.

[0024] The second telescopic frame is installed on the first telescopic frame, and the knife door component is fixed to the telescopic end of the second telescopic frame. The overall structure is compact, occupies little space, and is easy to install and modify in existing shredders. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a knife gate adjustment device according to an embodiment of this application assembled on a shredder; Figure 2 This is an embodiment of the present application. Figure 1 Schematic diagram of the main structure of the knife gate adjustment device in the middle; Figure 3 This is a top view of a knife gate adjustment device (helical gear transmission) according to an embodiment of this application. Figure 4 This is a top view of a blade gate adjustment device (worm gear drive) according to an embodiment of this application. Figure 5 This is an exploded structural diagram of a knife gate component according to an embodiment of this application; Figure 6 This is a schematic flowchart of an adjustment method according to an embodiment of this application; The components include: 1. Shredder; 11. Conveying channel; 12. First conveyor belt; 13. Second conveyor belt; 14. Roller; 15. Cutter; 2. First telescopic frame; 21. Fixed rod; 22. Drive cylinder; 23. First lifting rod; 3. Second telescopic frame; 31. Platform; 311. Connecting rod; 312. Platform plate; 32. Drive motor; 33. Second lifting rod; 34. Drive gear; 35. Guide rod; 4. Knife gate component; 41. Connecting seat; 42. Pressing block; 43. Pressing surface. Detailed Implementation

[0027] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this invention, 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," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this invention, unless otherwise explicitly 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 part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] This application proposes improvements and innovations, and presents the following embodiments.

[0034] In some implementations, please refer to Figures 1 to 6 On one hand, a knife gate height adjustment device is provided for installation inside a shredder 1. The shredder 1 has a conveying channel 11, and a first conveyor belt 12 is arranged inside the conveying channel 11. Cutting blades 15 are spaced apart on the discharge end of the first conveyor belt 12. The knife gate height adjustment device is located between the discharge end of the first conveyor belt 12 and the cutting blades 15. It includes: The first telescopic frame 2 is used to rotatably connect with the roller 14 at one end of the first conveyor belt 12, and the first telescopic frame 2 can drive the roller 14 to telescopically move. The second telescopic frame 3 is installed on the first telescopic frame 2, and the second telescopic frame 3 can telescopically move relative to the first telescopic frame 2; The knife door component 4 is fixedly installed on the telescopic end of the second telescopic frame 3.

[0035] The first conveyor belt 12 is located at the upper part of the conveying channel 11, and one roller 14 of the first conveyor belt 12 is located at the outlet of the conveying channel 11. The first telescopic frame 2 can drive the roller 14 to telescopically move towards the center of the cross-section of the outlet of the conveying channel 11 to change the size of the outlet.

[0036] A second conveyor belt 13 is provided in the conveying channel 11. The second conveyor belt 13 is spaced apart from the first conveyor belt 12. The conveying channel 11 extends horizontally, and the first conveyor belt 12 and the second conveyor belt 13 are arranged at intervals in the vertical direction, that is, located on the upper and lower end faces of the conveying channel 11.

[0037] The roller 14 at the outlet of the conveying channel 11 is moved telescopically by the first telescopic frame 2, which changes the outlet size and thus adjusts the thickness of the material accumulation at the outlet. Simultaneously, the knife gate component 4 is moved telescopically by the second telescopic frame 3, allowing independent adjustment of the pressure applied to the material by the knife gate component 4. Together, these two mechanisms allow for flexible adjustment of the pressure and cutting force according to the characteristics of different materials such as tobacco sheets, stems, and leaves, improving the adaptability of the shredder 1 to different materials and avoiding downtime and material shortages caused by mismatched pressure or cutting forces.

[0038] The double-layer telescopic structure of the first telescopic frame 2 and the second telescopic frame 3 provides higher adjustment accuracy and more convenient operation compared to the traditional manual adjustment method of adding or removing shims or rotating bolts, without relying on the operator's experience and judgment.

[0039] The second telescopic frame 3 is installed on the first telescopic frame 2, and the knife door component 4 is fixed to the telescopic end of the second telescopic frame 3. The overall structure is compact, occupies little space, and is easy to install and modify in the existing shredder 1.

[0040] In one embodiment, the first telescopic frame 2 includes a fixed rod 21, a drive cylinder 22, and a first lifting rod 23. The fixed rod 21 is fixedly connected to the shredder 1; the drive cylinder 22 is fixedly connected to the fixed rod 21; the first lifting rod 23 is fixedly connected to the telescopic end of the drive cylinder 22; the first lifting rod 23 is rotatably connected to the roller 14; and the second telescopic frame 3 is fixedly connected to the first lifting rod 23. Through the specific connection methods of the fixed rod 21, the drive cylinder 22, and the first lifting rod 23, a stable telescopic drive unit is formed. The fixed rod 21 is fixed to the frame of the shredder 1, the drive cylinder 22 provides power, and the first lifting rod 23 is directly rotatably connected to the roller 14. This not only results in a simple structure and convenient installation, but also allows the linear telescopic movement of the drive cylinder 22 to precisely control the displacement of the roller 14, ensuring the accuracy and repeatability of the outlet size adjustment and providing a stable foundation for subsequent knife gate adjustment.

[0041] The drive cylinder 22 can provide greater compressive pressure, which reduces the burden on the adjustment of the second telescopic frame 3.

[0042] Drive cylinder 22 is a hydraulic cylinder. It can quickly adjust the extension and retraction of the first lifting cylinder, achieving rapid adjustment.

[0043] In one embodiment, the second telescopic frame 3 includes a platform 31, a drive motor 32, and a second lifting rod 33. The platform 31 is fixedly connected to the first lifting rod 23. The drive motor 32 is fixedly connected to the platform 31, and the second lifting rod 33 is movably connected to the platform 31, and the second lifting rod 33 can move up and down relative to the platform 31. The drive motor 32 and the second lifting rod 33 are connected in a transmission manner. The knife gate component 4 is fixedly connected to one end of the lifting rod. The knife gate component 4 is spaced apart from the roller 14. The platform 31, drive motor 32, and second lifting rod 33 form an independent adjustment unit. The platform 31 is fixed to the first lifting rod 23, allowing the second telescopic frame 3 to move as a whole with the first telescopic frame 2. Simultaneously, the second lifting rod 33 moves up and down relative to the platform 31 under the drive of the motor, achieving secondary fine adjustment of the knife gate component 4 relative to the roller 14. This structure introduces motor drive into knife gate height adjustment, replacing traditional manual operation. It offers high adjustment accuracy, fast response, and allows for online fine-tuning without stopping the machine, significantly improving production efficiency.

[0044] In one embodiment, the output end of the drive motor 32 is engaged with a drive gear 34; the drive gear 34 is rotatably connected to the platform 31; the second lifting rod 33 passes through the drive gear 34 and is threadedly connected to the drive gear 34; the second lifting rod 33 can rotate relative to the drive gear 34.

[0045] Specifically, the output end of the drive motor 32 meshes with the drive gear 34 using helical gear meshing to change the direction of power transmission. The meshing between the output end of the drive motor 32 and the drive gear 34 uses a worm gear drive, meaning the output end of the drive motor 32 is fixedly connected to a worm, and the drive gear 34 is a worm.

[0046] By engaging the drive gear 34 with the threaded connection of the second lifting rod 33, the rotational motion of the motor is converted into the linear lifting motion of the second lifting rod 33, resulting in high transmission efficiency and self-locking characteristics (especially when using worm gear transmission).

[0047] Helical gear meshing or worm gear transmission can change the direction of power transmission, making it easier to lay out the motor in a limited space. At the same time, the self-locking performance of the worm gear can keep the tool gate position unchanged after power failure, improving safety and stability and preventing the tool gate from sliding down due to gravity or vibration.

[0048] In one embodiment, a guide rod 35 is movably inserted through the stage 31; the guide rod 35 is fixedly connected to the knife gate component 4; the guide rod 35 is arranged parallel to the second lifting rod 33. The guide rod 35, parallel to the second lifting rod 33, is movably inserted through the stage 31 and fixedly connected to the knife gate component 4. As an auxiliary guiding element, the guide rod 35 effectively counteracts the deflection torque generated during the lifting and lowering of the knife gate component 4, ensuring that the knife gate component 4 always lifts and lowers in a straight line, avoiding skew caused by unilateral force on the second lifting rod 33 or thread clearance, thereby improving the repeatability of the knife gate height adjustment and extending the service life of the threaded pair and the drive motor 32.

[0049] In one embodiment, the platform 31 includes a connecting rod 311 and a carrying plate 312; the connecting rod 311 is fixedly connected to the first lifting rod 23; the carrying plate 312 is fixedly connected to the connecting rod 311; the drive motor 32 is fixedly connected to the carrying plate 312; the drive gear 34 is rotatably connected to the carrying plate 312 via a bearing; the guide rod 35 and the second lifting rod 33 both movably pass through the carrying plate 312. The platform 31 is composed of the connecting rod 311 and the carrying plate 312. The connecting rod 311 is fixed to the first lifting rod 23, and the carrying plate 312 carries components such as the drive motor 32 and the drive gear 34. This split structure ensures a firm connection between the platform 31 and the first telescopic frame 2, and provides sufficient mounting surface for the drive motor 32, gears, guide rod 35, etc., making the overall layout compact and orderly, easy to assemble and maintain, and enhancing the support rigidity of the second lifting rod 33 and the guide rod 35.

[0050] In one embodiment, the knife door component 4 includes a connecting seat 41 and a pressing block 42; the second lifting rod 33 and the guide rod 35 are both fixedly connected to the connecting seat 41; the pressing block 42 is detachably connected to the connecting seat 41; the pressing block 42 has a pressing surface 43 for contacting tobacco shreds in the conveying channel 11; the pressing surface 43 is inclined and parallel to the conveying direction of the first conveyor belt 12.

[0051] Specifically, the second lifting rod 33 and guide rod 35 are both fixedly connected to the connecting seat 41 by bolts. The knife gate component 4 consists of the connecting seat 41 and the pressure block 42. The pressure block 42 is detachable, and the pressing surface 43 of the pressure block 42 is designed as an inclined surface parallel to the conveying direction. This inclined surface structure can generate a downward component force when compacting materials, allowing materials to enter the cutter 15 area more smoothly, reducing material accumulation and resistance. The detachable pressure block 42 makes it easy to replace pressure blocks 42 with different angles or materials according to different material types, expanding the application range of the device and facilitating individual replacement after wear, thus reducing maintenance costs.

[0052] In one embodiment, the pressure block 42 has a slot into which the connecting seat 41 can be engaged; the inner wall of the slot has a threaded hole; after the connecting seat 41 is engaged in the slot, it is connected by bolts. The slot on the pressure block 42 and the bolts locking the connecting seat 41 after engagement provide quick assembly and disassembly, accurate positioning, and allow for rapid replacement of the pressure block 42 without special tools, reducing downtime; simultaneously, the bolt connection ensures the reliability of the pressure block 42 during operation, preventing loosening due to vibration and ensuring the positional accuracy and safety of the pressing surface 43.

[0053] In one embodiment, there are two second lifting rods 33, each rotatably connected to one end of the roller 14; both second lifting rods 33 are fixedly connected to the carrying plate 312. Specifically, there are also two drive cylinders 22, each drive rod being connected to one of the two second lifting rods 33 in a transmission manner.

[0054] Two second lifting rods 33 are configured, corresponding to the two ends of the roller 14 respectively, and driven by two drive cylinders 22 respectively, so that the two ends of the knife gate component 4 rise and fall synchronously, with balanced force, avoiding knife gate tilting or jamming caused by unilateral drive, which is particularly suitable for wide conveying channels 11. At the same time, multiple guide rods 35 are arranged at intervals on the connecting seat 41 to further enhance guiding stability and anti-eccentric load capacity, ensuring that the pressure of the knife gate component 4 on the material is uniform and consistent throughout the width direction, and improving the lateral uniformity of shredding.

[0055] There are multiple guide rods 35, which are spaced apart on the connecting seat 41.

[0056] In one embodiment, another aspect provides a method for adjusting the height of the knife gate, comprising the following steps: S1. Adjust the amount of extension of the first telescopic frame 2 towards the center of the cross-section of the conveying channel 11 outlet according to the pressure required at the outlet of the conveying channel 11, so as to adjust the pressure of the roller 14 at one end of the first conveyor belt 12 on the tobacco leaves and / or tobacco stems in the outlet of the conveying channel 11. S2. Adjust the amount of extension of the second telescopic frame 3 towards the center of the cross-section of the conveying channel 11 outlet to adjust the pressure of the knife gate component 4 on the tobacco leaves and / or tobacco stems in the conveying channel 11 outlet.

[0057] First, adjust the first telescopic frame 2 according to the required pressure to change the outlet size and initial material accumulation thickness; then adjust the second telescopic frame 3 to finely adjust the final pressure of the knife gate component 4 on the material. This method decouples the outlet size adjustment from the knife gate pressure adjustment, allowing operators to make coarse adjustments first and then fine adjustments. The logic is clear and easy to execute. Through two-step coordinated adjustment, the optimal process parameters for a specific material can be quickly found, maximizing the dual-layer adjustment advantage of the device, ensuring the stability of the shredding quality, and reducing the number of trial cuts and material waste.

[0058] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A knife gate height adjustment device for installation inside a shredder, the shredder having a conveying channel, a first conveyor belt arranged within the conveying channel, and cutters spaced apart on the discharge end of the first conveyor belt; the knife gate height adjustment device is located between the discharge end of the first conveyor belt and the cutters; characterized in that, include: A first telescopic frame is used to rotatably connect with a roller at one end of the first conveyor belt, and the first telescopic frame can drive the roller to telescopically move. The second telescopic frame is mounted on the first telescopic frame and can telescopically move relative to the first telescopic frame; The knife door component is fixedly installed on the telescopic end of the second telescopic frame.

2. The adjusting device according to claim 1, characterized in that, The first telescopic frame includes a fixed rod, a drive cylinder, and a first lifting rod; the fixed rod is used to be fixedly connected to the shredder; the drive cylinder is fixedly connected to the fixed rod; the first lifting rod is fixedly connected to the telescopic end of the drive cylinder; the first lifting rod is rotatably connected to the roller; and the second telescopic frame is fixedly connected to the first lifting rod.

3. The adjusting device according to claim 2, characterized in that, The second telescopic frame includes a platform, a drive motor, and a second lifting rod; the platform is fixedly connected to the first lifting rod; the drive motor is fixedly connected to the platform, and the second lifting rod is movably connected to the platform, and the second lifting rod can move up and down relative to the platform. The drive motor is connected to the second lifting rod; the knife gate component is fixedly connected to one end of the lifting rod; the knife gate component and the roller are spaced apart.

4. The adjusting device according to claim 3, characterized in that, The output end of the drive motor is engaged with a drive gear; the drive gear is rotatably connected to the platform; the second lifting rod passes through the drive gear, and the second lifting rod is threadedly connected to the drive gear. The second lifting rod can rotate relative to the drive gear.

5. The adjusting device according to claim 4, characterized in that, A guide rod is also movably inserted through the platform; the guide rod is fixedly connected to the knife door component; the guide rod is arranged parallel to the second lifting rod.

6. The adjusting device according to claim 5, characterized in that, The platform includes a connecting rod and a platform plate; the connecting rod is fixedly connected to the first lifting rod; the platform plate is fixedly connected to the connecting rod; the drive motor is fixedly connected to the platform plate; the drive gear is rotatably connected to the platform plate; the guide rod and the second lifting rod both move through the platform plate.

7. The adjusting device according to claim 6, characterized in that, The knife gate component includes a connecting seat and a pressure block; the second lifting rod and the guide rod are both fixedly connected to the connecting seat; the pressure block is detachably connected to the connecting seat; the pressure block has a pressing surface for contacting tobacco shreds in the conveying channel; the pressing surface is inclined and parallel to the conveying direction of the first conveyor belt.

8. The adjusting device according to claim 7, characterized in that, The pressure block has a slot for the connecting seat to be inserted; the inner wall of the slot has a threaded hole; the connecting seat is connected by bolts after being inserted into the slot.

9. The adjusting device according to claim 6, characterized in that, There are two second lifting rods, each rotatably connected to one end of the roller; both second lifting rods are fixedly connected to the carrying plate.

10. A method for adjusting the height of a cutting gate, performed using the cutting gate height adjusting device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Adjust the amount of extension of the first telescopic frame towards the center of the cross-section of the conveying channel outlet according to the required pressure at the outlet of the conveying channel, so as to adjust the pressure of the roller at one end of the first conveyor belt on the tobacco leaves and / or tobacco stems in the outlet of the conveying channel. S2. Adjust the amount of extension of the second telescopic frame towards the center of the cross-section of the conveying channel outlet to adjust the pressure of the knife gate component on the tobacco leaves and / or tobacco stems in the conveying channel outlet.

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