Cigarette strip cutting device and cigarette strip cutting method

Abstract

The invention belongs to the technical field of cigarette production, and discloses a cigarette bar cutting device and a cigarette bar cutting method. The device comprises a wheel body, a circular cutter and a cylindrical cam, the wheel body is rotationally arranged in the axis direction, a guide rail groove and a cutter seam are formed in the peripheral face of the wheel body, the circular cutter is movably arranged in the axis direction and synchronously rotates with the wheel body, and a cam groove of the cylindrical cam is provided with double acting faces which are matched with double rollers connected with the circular cutter. And the circular cutter can be driven to enter the guide rail groove and can be driven to leave the guide rail groove. Compared with a hooke type cutterhead which is installed in an inclined mode, the round cutter moves in the linear direction, so that the assembly requirement precision is low, the assembly and maintenance difficulty is low, and interference caused by assembly errors is not prone to being generated. And meanwhile, the inertia and vibration of the round cutter are smaller, the movement stability is high, position deviation caused by long-time work is not prone to occurring, it can be guaranteed that notches are flush and perpendicular to the axis of the cigarette strip, and the product quality is guaranteed advantageously.

Description

Technical Field

[0001] This invention relates to the field of cigarette production technology, and in particular to a cigarette pack cutting device and a cigarette pack cutting method. Background Technology

[0002] Cigarette cutting involves slicing a rolled cigarette into cigarette sticks that are moved in a straight line into sticks twice the length. Existing cigarette rolling machines often employ mechanisms such as a Hooke cutter head and a bell mouthpiece to cut the cigarette sticks.

[0003] However, due to the high precision requirements of the Hooke cutter head and the nozzle, any assembly errors or misalignment caused by prolonged operation can lead to skewed or uneven cuts during cigarette cutting. This can even result in interference between the cutter blade and the nozzle, causing damage to either. Furthermore, the Hooke cutter head can only perform "double-blade, double-cut," limiting production efficiency. Additionally, the tilted arrangement of the Hooke cutter head results in significant inertia and vibration during movement. Replacement or maintenance requires complex dynamic balancing tests to recalibrate the assembly precision, leading to difficult maintenance, poor operational stability, and compromised product quality.

[0004] Therefore, there is an urgent need for a cigarette bar cutting device and a cigarette bar cutting method to at least solve one of the above-mentioned technical problems. Summary of the Invention

[0005] One objective of this invention is to provide a cigarette bar cutting device that can improve cutting efficiency, reduce assembly and maintenance difficulty, and has high operational stability, which is beneficial to improving product quality.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A cigarette pack cutting device, comprising:

[0008] A wheel body is rotatable about an axis. The outer circumferential surface of the wheel body is provided with a guide groove and a slit. The depth direction of the guide groove is along the radial direction of the wheel body, and the length direction of the guide groove is along the circumference direction of the wheel body. The depth direction of the slit is along the radial direction of the wheel body, and the length direction of the slit is along the axial direction of the wheel body. The slit is connected to the guide groove.

[0009] A circular cutter is movably disposed along the axial direction of the wheel body and rotates synchronously with the wheel body around the axial direction of the wheel body. The circular cutter has a first state and a second state. In the first state, the circular cutter is located in the guide groove to cut the cigarette bar. In the second state, the circular cutter is located outside the guide groove.

[0010] A cylindrical cam, wherein the cylindrical cam is fixedly installed and the outer peripheral surface of the cylindrical cam is provided with a cam groove with a double working surface, the cam groove having a push stroke section and a return stroke section;

[0011] A double roller is driven between the circular cutter and the cylindrical cam, and the double roller is in contact with the cam groove. The double roller can move along the push stroke section and the return stroke section. When the double roller moves in the push stroke section, it can drive the circular cutter through the cutter slit into the guide groove, so that the circular cutter is in the first state. When the double roller moves in the return stroke section, it can drive the circular cutter through the cutter slit away from the guide groove, so that the circular cutter is in the second state.

[0012] In some embodiments, the circular cutter is disc-shaped and coaxially fixedly connected to a gear. The wheel body is provided with a rack, the length direction of which is arranged along the axial direction of the wheel body. The gear and the rack are meshed together so that the circular cutter rotates during the transition from the second state to the first state.

[0013] In some embodiments, the circular cutter is connected to a double push rod, the double push rod including a first push rod and a second push rod, the circular cutter being located between the first push rod and the second push rod, and...

[0014] The wheel is connected to a linear bearing, and the first push rod and the second push rod slide through the linear bearing.

[0015] In some embodiments, the double rollers are mounted on a connecting rod frame at the end of the double push rod away from the circular cutter. A double-acting surface is provided in the cam groove. The double rollers are inserted into the cam groove and abut against the double-acting surface, so that when the double rollers run in the push stroke section, the double rollers push the circular cutter toward the first state. When the double rollers run in the return stroke section, the double rollers push the circular cutter toward the second state.

[0016] In some embodiments, the cam groove further includes a rest section, and the circular cutter remains in the second state when the double roller is located within the rest section.

[0017] In some embodiments, the cigarette pack cutting device further includes a gas distribution plate with a negative pressure annular groove located on the upper part of the gas distribution plate and corresponding to the position of the circular cutter. The wheel body is provided with a suction hole and an axial air hole. One end of the suction hole is located in the guide rail groove, and the other end of the suction hole communicates with the axial air hole. One end of the axial air hole opens onto the end face of the wheel body.

[0018] The air distribution plate is fitted to the wheel body, and when the wheel body rotates, the axial air hole can communicate with the negative pressure annular groove to adsorb and fix the cigarette bar located in the guide rail groove.

[0019] In some embodiments, the air distribution plate further has a positive pressure annular groove, which is disposed at the lower part of the air distribution plate, and the positive pressure annular groove and the negative pressure annular groove are symmetrically arranged with respect to the horizontal cross section of the air distribution plate. The wheel can rotate to make the axial air hole and the positive pressure annular groove communicate, so as to blow and clean the guide rail groove.

[0020] In some embodiments, the wheel body further includes a slit vent, one end of which is connected to the axial vent, and the other end of which is located on the inner wall of the slit.

[0021] In some embodiments, the wheel body has at least two of the blade slits, and the cigarette strip cutting device correspondingly includes at least two of the circular cutters.

[0022] Another objective of this invention is to provide a method for cutting cigarette packs that can improve product quality.

[0023] To achieve this objective, the present invention adopts the following technical solution:

[0024] The cigarette stick cutting method is implemented using the aforementioned cigarette stick cutting device. A circular cutter is used to cut the cigarette stick, and during cutting, the circular cutter rotates and moves linearly in a direction close to the cigarette stick.

[0025] The beneficial effects of this invention are:

[0026] In this cigarette pack cutting device, compared to the inclined Hooke-type cutter head, the circular cutter moves in a straight line. Therefore, the assembly precision requirements between the circular cutter and the cutter head are lower, and the assembly and maintenance are easier. It is also less likely to cause interference between the circular cutter and the wheel body due to assembly errors. At the same time, the inertia and vibration of the circular cutter during movement are less than those of the Hooke-type cutter head, resulting in higher motion stability. It is less likely to experience positional deviation due to long-term operation, ensuring a flush cut and perpendicularity to the cigarette pack axis, which is beneficial to ensuring product quality.

[0027] In this cigarette bar cutting method, a circular cutter is used to cut the cigarette bar. During the cutting process, the circular cutter rotates and moves linearly in a direction close to the cigarette bar. This cutting method combines linear motion and rotation, increasing the cutting speed and cutting force of the circular cutter perpendicular to the direction of cigarette bar movement. The rotation also increases the stability of the circular cutter, thereby ensuring a clean cut and optimizing the quality of the cut product. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating the principle of using a Hooke-type cutter head for cutting tobacco strips in existing technology;

[0029] Figure 2 This is a partial three-dimensional view of the cigarette bar cutting device in this invention;

[0030] Figure 3 This is a schematic diagram of the transmission connection between the cam groove and the circular cutter in this invention;

[0031] Figure 4 This is a schematic diagram showing the position between the tobacco stick and the circular cutter in this invention;

[0032] Figure 5 This is an assembly diagram of the drive shaft, support, and bracket in this invention;

[0033] Figure 6 The cigarette pack cutting device of this invention is along Figure 4 A cross-sectional view along the AA direction.

[0034] In the picture:

[0035] 100. Tobacco stick; 101. Tube; 102. Hooker blade; 103. Cutter; 104. Mouthpiece;

[0036] 200. Gear; 201. Drive shaft; 202. Support; 203. Housing; 204. Protective cover; 205. Cylindrical cam; 206. Double roller; 207. Double push rod; 208. Bearing housing; 209. Rack; 210. Gear; 211. Circular cutter; 212. Air distribution plate; 213. Support plate; 214. Negative pressure air inlet; 215. Negative pressure annular groove; 216. Suction hole; 217. End cap; 218. Hub; 219. Screw pin; 220. Positive pressure air inlet; 221. Gasket; 222. Compression spring; 223. Positive pressure annular groove; 224. Knife slot air hole; 225. Knife slot; 226. Guide rail groove; 227. Axial air hole; 228. Positioning disc; 229. Wheel body; 230. Bracket;

[0037] 300. Cam groove;

[0038] 400, Horizontal axis;

[0039] 500, semi-circular keyway; 501, first screw hole; 502, semi-circular key; 503, pull screw hole; 504, second screw hole;

[0040] 800, Linkage Frame. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0042] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," and "abutting" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0045] like Figure 1As shown, in the related cutting device, a Hooke's cutter head 102 and a bell mouthpiece 104 are used to cut the tobacco stick 100, i.e., to cut it into a cigarette stick twice the length. Exemplarily, the tobacco stick 100 is conveyed through a conduit 101 and moves through the bell mouthpiece 104. The bell mouthpiece 104 has a first limiting block and a second limiting block spaced apart, with a gap between the first and second limiting blocks. The Hooke's cutter head 102 is installed at an angle and has two blades. The Hooke's cutter head 102 can rotate at high speed, thereby driving the two blades to pass sequentially through the gap of the bell mouthpiece 104, thus cutting the tobacco stick 100.

[0046] The bell mouthpiece 104 provides support, preventing the tobacco stick 100 from sagging and deforming under stress, thus maintaining the stability of the tobacco stick 100. During the rotation of the Hooke blade disc 102, the blade has a speed V. a The speed V a The first component velocity V can be obtained by decomposition. t Second velocity V h Among them, the first component velocity V t The second component of velocity is the velocity component of the cutter 103 along the axis of the tobacco strip 100. h This is the component of velocity of the cutter 103 along the direction perpendicular to the axis of the tobacco strip 100. It can be understood that when the first component velocity V... t The second component velocity V is the same as the speed of the cigarette stick 100. h When all three conditions are met—non-zero, the cutter 103 remains sharp—pressure can be generated between the cutter 103 and the tobacco stick 100, thereby achieving a good cutting effect, ensuring the flatness of the cut and its perpendicularity to the axis of the tobacco stick 100.

[0047] However, the Hooke cutter head 102 and the bell mouth 104 require high-precision assembly, and the inclined Hooke cutter head 102 has the characteristics of large inertia and large vibration during movement. These factors lead to high assembly and maintenance difficulty, low operational stability, poor cut quality, low production efficiency, and consequently, a decline in product quality. Therefore, as... Figures 2 to 6 As shown, the present invention provides a cigarette bar cutting device to improve cutting efficiency, reduce assembly and maintenance difficulty, and has high operational stability, which is beneficial to improving product quality.

[0048] Specifically, such as Figures 2 to 4As shown, the cigarette bar cutting device includes a wheel 229, a circular cutter 211, and a cylindrical cam 205. The wheel 229 rotates around its own axis, and its outer circumferential surface is provided with a guide groove 226 and a cutter slit 225. The depth direction of the guide groove 226 is along the radial direction of the wheel 229, and the length direction of the guide groove 226 is along the circumference direction of the wheel 229. The cigarette bar 100 moves parallel to the radial direction of the wheel 229, and as shown... Figure 2 , Figure 4 As shown, the guide groove 226 is U-shaped, which allows the cigarette bar 100 to be embedded and confined within the guide groove 226.

[0049] The depth direction of the slit 225 is set along the radial direction of the wheel body 229, and the length direction of the slit 225 extends along the axial direction of the wheel body 229. The circular cutter 211 is movably set along the axial direction of the wheel body 229, and the slit 225 communicates with the guide groove 226, so that the circular cutter 211 can enter and exit the guide groove 226 through the slit 225. In this invention, the circular cutter 211 has a first state and a second state. In the first state, the circular cutter 211 is located inside the guide groove 226 to cut the tobacco stick 100. In the second state, the circular cutter 211 is located outside the guide groove 226 to avoid the circular cutter 211 interfering with the re-entry of the tobacco stick 100.

[0050] Reference Figure 3 As shown, a cylindrical cam 205 is fixedly installed, and a cam groove 300 is provided on the outer circumferential surface of the cylindrical cam 205. A circular cutter 211 is connected to a double roller 206, which is driven by the cylindrical cam 205 through the cam groove 300. The cam groove 300 includes a push stroke section and a return stroke section. When the double roller 206 moves in the push stroke section, it can drive the circular cutter 211 through the cutter slot 225 into the guide rail groove 226, so that the circular cutter 211 is in a first state. When the double roller 206 moves in the return stroke section, it can drive the circular cutter 211 through the cutter slot 225 away from the guide rail groove 226, so that the circular cutter 211 is in a second state.

[0051] Since the length direction of the kerf 225 is set along the axis of the wheel body 229, the circular cutter 211 also moves along the axis of the wheel body 229 to enter the guide groove 226. Therefore, the circular cutter 211 has the aforementioned second component velocity V. h Meanwhile, the circular cutter 211 is configured to rotate synchronously with the wheel 229 around its axis. Therefore, by controlling the rotational speed of the wheel 229, the circular cutter 211 can achieve the aforementioned first component speed V. t And make the first component velocity V tThe movement speed of the cigarette stick 100 along its own axis is the same. Simultaneously, the U-shaped guide groove 226 provides support and limits the movement of the cigarette stick 100, preventing deformation. Thus, by simply maintaining the sharpness of the circular cutter 211, a smooth cut and perpendicularity to the axis of the cigarette stick 100 can be achieved, resulting in a good cutting effect.

[0052] Compared to the Hooke-type cutter head 102, the circular cutter 211 moves in a straight line. Therefore, the assembly precision requirements between it and the cutter slit 225 are lower, making assembly and maintenance easier and reducing the likelihood of interference between the circular cutter 211 and the wheel 229 due to assembly errors. Furthermore, the circular cutter 211 exhibits less inertia and vibration during movement compared to the inclined Hooke-type cutter head 102, resulting in higher motion stability. It is less prone to positional deviations during prolonged operation, ensuring a flush cut and perpendicularity to the tobacco strip 100 axis, thus contributing to product quality.

[0053] Furthermore, along the circumferential direction of the wheel 229, more cutting slits 225 and corresponding circular cutters 211 can be set according to the requirements of cutting efficiency. For example, in this embodiment, four cutting slits 225 and four corresponding circular cutters 211 are evenly distributed circumferentially on the wheel 229, thereby overcoming the limitation of the "double-blade double-cutting" of the Hooke cutter head 102 and achieving improved production efficiency. Specifically, the length of the arc MN between the four cutting slits 225 is equal to that of a double-length cigarette (2L) to meet the requirements for cigarette length.

[0054] Continue to refer to Figure 2 , Figure 3 As shown, in this embodiment, the circular cutter 211 is disc-shaped and can rotate while moving towards the tobacco stick 100, thereby further increasing the cutting speed and cutting force of the circular cutter 211 perpendicular to the direction of movement of the tobacco stick 100, optimizing the cutting effect, and making the cut even. Specifically, the circular cutter 211 is connected to a horizontal shaft 400, and two gears 210 are fixedly installed on the horizontal shaft 400. The wheel body 229 is provided with a rack 209, and the length direction of the rack 209 is arranged along the axis of the wheel body 229. The gears 210 and the rack 209 are meshed and connected. When the circular cutter 211 changes from the second state to the first state, the circular cutter 211 moves in the direction towards the tobacco stick 100, and the gears 210 can drive the circular cutter 211 to rotate around its own axis, thereby realizing the rotation of the circular cutter 211.

[0055] More specifically, in this embodiment, gears 210 are provided on both sides of the circular cutter 211, and each gear 210 is meshed with a rack 209, thereby applying a symmetrical torque to the circular cutter 211 and preventing the circular cutter 211 from deflecting due to its rotation.

[0056] like Figure 2As shown, the circular cutter 211 is connected to a double push rod 207, and the wheel 229 is connected to a bearing housing 208, which is connected to a linear bearing. The double push rod 207 slides through the linear bearing. One end of the double push rod 207 is rotatably connected to the gear 210 and the circular cutter 211, while the other end is driven by the cylindrical cam 205 mentioned above through the cam groove 300. When the wheel 229 rotates, the double push rod 207 can rotate with the wheel 229 and move linearly along the axis of the wheel 229 under the action of the cam groove contour, thereby driving the circular cutter 211 to change between the first state and the second state.

[0057] Preferably, the double push rod 207 includes a first push rod and a second push rod, with the circular cutter 211 and gear 210 located between the first and second push rods. This ensures that the circular cutter 211 is subjected to uniform and symmetrical force on both sides, preventing it from tilting and maintaining a flush cut and perpendicularity to the axis of the tobacco strip 100. A connecting rod bracket 800 is fixedly installed at the ends of the first and second push rods away from the circular cutter 211, on which the aforementioned double rollers 206 are mounted. The double rollers 206 are inserted into the cam groove 300 and engage with the double-acting surface of the cam groove, thereby enabling changes in the state of the circular cutter 211.

[0058] More specifically, such as Figure 3 As shown, the cam groove 300 includes the aforementioned push stroke section (EF) and return stroke section (FG). When the double roller 206 moves within the push stroke section, the circular cutter 211 changes towards the first state; when the double roller 206 moves within the return stroke section, the circular cutter 211 changes towards the second state. Preferably, the profile of the push stroke section causes the movement of the circular cutter 211 along the axis of the wheel body 229 to conform to a sinusoidal acceleration motion law, while the profile of the return stroke section causes the movement of the circular cutter 211 along the axis of the wheel body 229 to conform to a fifth-order polynomial motion law. Both of these laws allow the circular cutter 211 to have a relatively smooth acceleration change during movement, thereby reducing vibration and impact, improving the operational stability of the mechanism and the smoothness of the tobacco strip 100 cutting.

[0059] Optionally, the cam groove 300 also includes a rest section (GE), in which the circular cutter 211 is held in a second state when the double roller 206 is in the rest section, i.e., along the axial direction of the wheel body 229, the circular cutter 211 is located outside the guide groove 226 and remains relatively stationary with respect to the wheel body 229.

[0060] like Figure 4 As shown, the wheel body 229 is provided with a suction hole 216. One end of the suction hole 216 is located in the guide rail groove 226 and can adsorb and position the cigarette strip 100. This is beneficial for the cigarette strip 100 to enter the guide rail groove 226 and also helps to further limit the cigarette strip 100 during the cutting process, so as to avoid the cigarette strip 100 from shifting and resulting in poor cutting effect.

[0061] Specifically, the cigarette cutting device also includes a gas distribution plate 212, which has a negative pressure annular groove 215, maintaining a negative pressure within the groove. The wheel body 229 is provided with an axial air hole 227, the other end of which is connected to the aforementioned suction hole 216. One end of the axial air hole 227 is open on the end face of the wheel body 229. The gas distribution plate 212 is fitted to the wheel body 229, and the negative pressure annular groove 215 and the circular cutter 211 are positioned correspondingly. When the wheel body 229 rotates to a preset first angle range, the axial air hole 227 can communicate with the negative pressure annular groove 215, thereby conducting negative pressure within the suction hole 216 to suck up and fix the cigarette stick 100 located in the guide rail groove 226.

[0062] Preferably, the air distribution plate 212 also has a positive pressure annular groove 223, within which a positive pressure is maintained. The positive pressure annular groove 223 is located at the lower part of the air distribution plate 212, while the negative pressure annular groove 215 is located at the upper part of the air distribution plate 212. The two are symmetrically arranged about the horizontal cross-section of the air distribution plate 212. The wheel 229 can rotate to a preset second angle range, allowing the axial air hole 227 to communicate with the positive pressure annular groove 223, thereby cleaning the guide rail groove 226. It should be noted that the aforementioned first and second angle ranges are determined based on specific tobacco stick 100 positioning requirements, and therefore are not specifically limited in this invention.

[0063] Optionally, in this embodiment, the wheel body 229 further includes a slit vent 224, one end of which is connected to the axial vent 227, and the other end of which is located on the inner wall of the slit 225. When the wheel body 229 rotates to the second angle range, under positive pressure, the airflow can clean the slit 225 through the axial vent 227 and the slit vent 224, thereby further preventing tobacco debris from clogging the slit 225.

[0064] Furthermore, in this embodiment, the cigarette strip cutting device also includes a drive shaft 201, a support 202, a positioning disc 228, a bracket 230, and other structures to limit and connect the aforementioned wheel 229 and cylindrical cam 205 along the axial direction of the wheel 229.

[0065] like Figure 5 , Figure 6As shown, in this embodiment, the support 202 is fixedly installed to support other components in the cigarette cutting device. The support 202 has an axial through hole, through which the drive shaft 201 passes via a bearing. The other end of the support 202 has a first screw hole 501, and the positioning disc 228 has a second screw hole 504. The positioning disc 228 and the support 202 are fixedly connected by bolts passing through the second screw hole 504 and connecting to the first screw hole 501. The bracket 230 is sleeved on the drive shaft 201, and along the axial direction of the drive shaft 201, the bracket 230 is limited and fixed between the positioning disc 228 and the support 202. The support 202 has four semi-circular keyways 500, and the bracket 230 has four semi-circular keys 502. Under the action of the positioning disc 228, the bracket 230 and the support 202 are fixedly connected through the corresponding insertion and engagement of the semi-circular keyway 500 and the semi-circular key 502, preventing the bracket 230 from rotating around the axis of the drive shaft 201. Preferably, a pull-out screw hole 503 is also provided at one end of the bracket 230 near the positioning disc 228, so as to facilitate the separation of the bracket 230 and other components fixedly connected to the bracket 230 from the drive shaft 201 after the positioning disc 228 is disassembled. The cylindrical cam 205 is positioned and mounted on the bracket 230 by screws and pins, and is fixed together with the bracket 230 and the support 202.

[0066] A drive shaft 201 passes through a positioning disc 228, and its end passing through the positioning disc 228 is connected to a hub 218 via a key. The aforementioned wheel 229 is fitted onto a bracket 230 and is rotatably connected to the bracket 230 via a bearing. The hub 218 is located on the side of the positioning disc 228 away from the wheel 229 and is fixedly connected to the wheel 229 via screws, pins, or other means. Thus, when the drive shaft 201 rotates, it can drive the wheel 229 to rotate via its contour, while avoiding interference with the fixed installation of the bracket 230 and the cylindrical cam 205. The aforementioned rack 209, bearing housing 208, and linear bearing are fixedly installed on the outer circumferential surface of the wheel 229, while the double push rod 207 slides through the linear bearing. One end of the double push rod 207 is connected to a gear 210 and a circular cutter 211, and the other end is connected to a double roller 206. When the wheel 229 rotates, the double roller 206 can move within the cam groove 300, thereby providing power for the linear motion and rotation of the circular cutter 211 along the axis of the wheel 229.

[0067] Preferably, the cigarette bar cutting device further includes a housing 203. A support 202 passes through and is fixedly connected to the housing 203 to secure the support 202. The aforementioned wheel 229 and other structures are located on the outside of the housing 203, and a gear 200 (or sprocket, pulley) is connected to one end of the drive shaft 201 located inside the housing 203, thereby providing power input to the cigarette bar cutting device. The housing 203 houses the power structure, such as the drive belt, achieving sealing and lubrication. Optionally, the cigarette strip cutting device also includes a protective cover 204, which is fitted onto the bracket 230 and rotatably connected to the bracket 230 via a bearing. Its other end is fixedly installed to the wheel body 229 by screws and rotates together with the wheel body 229 to form a sealed space. The aforementioned cylindrical cam 205, double roller 206, and double push rod 207 are housed in the space to prevent dust from entering and ensure good lubrication.

[0068] The cigarette pack cutting device also includes a support frame, which is fixedly mounted and movably connected to the aforementioned air distribution plate 212. Specifically, the support frame is connected to a washer 221, a screw pin 219, and a compression spring 222. The screw pin 219 is fixedly connected to the support frame, and the washer 221 is fixedly mounted on the screw pin 219. The compression spring 222 is sleeved on the screw pin 219, and one end of the compression spring 222 abuts against the washer 221. The support frame is provided with a mounting groove, and the air distribution plate 212 is movably and limitedly positioned within the mounting groove along the axial direction of the wheel body 229. The other end of the compression spring 222 abuts against the air distribution plate 212, enabling the air distribution plate 212 to apply a spring force towards the wheel body 229. The mounting slot is equipped with a negative pressure air inlet 214 and a positive pressure air inlet 220. The negative pressure air inlet 214 is connected to the negative pressure annular groove 215 of the air distribution plate 212 to achieve negative pressure within the groove 215. The positive pressure air inlet 220 is connected to the positive pressure annular groove 223 of the air distribution plate 212 to achieve positive pressure within the groove 223. During use, the air distribution plate 212 is held against the wheel body 229 by elasticity, thereby ensuring the airtightness between the wheel body 229 and the air distribution plate 212. Furthermore, the air distribution plate 212 is preferably made of graphite material to reduce friction damage.

[0069] Optionally, the support frame has a central hole through which the drive shaft 201 passes and is rotatably connected to the support frame via a bearing. This facilitates the coaxial mounting of the valve disc 212 and the wheel 229, ensuring assembly accuracy between the wheel 229 and the valve disc 212 and reducing assembly difficulty. The support frame is also connected to an end cap 217, which covers the side of the central hole away from the drive shaft 201, thus protecting the bearing within the central hole.

[0070] This invention also provides a method for cutting cigarette sticks, implemented using the aforementioned cigarette stick cutting device. In this method, a circular cutter 211 is used to cut the cigarette stick 100. During the cutting process, the circular cutter 211 rotates and moves linearly in a direction close to the cigarette stick 100. This cutting method, combining linear motion and rotation, increases the cutting speed and cutting force of the circular cutter 211 perpendicular to the direction of movement of the cigarette stick 100. The rotation also increases the stability of the circular cutter 211, thereby ensuring a clean cut and optimizing the quality of the cut product.

[0071] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present 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.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cigarette rod cutting apparatus, characterized by, Comprise: A wheel body (229) is arranged to rotate around an axis direction, an outer peripheral surface of the wheel body (229) is provided with a guide rail groove (226) and a knife slit (225), a depth direction of the guide rail groove (226) is arranged along a radial direction of the wheel body (229), and a length direction of the guide rail groove (226) is arranged along a circumferential direction of the wheel body (229), a depth direction of the knife slit (225) is arranged along a radial direction of the wheel body (229), and a length direction of the knife slit (225) is arranged to extend along an axis direction of the wheel body (229), and the knife slit (225) is communicated with the guide rail groove (226); A rotary cutter (211) is movably arranged along an axis direction of the wheel body (229), and is arranged to rotate synchronously with the wheel body (229) around an axis direction of the wheel body (229), the rotary cutter (211) has a first state and a second state, in the first state, the rotary cutter (211) is located in the guide rail groove (226) to cut a cigarette rod (100), in the second state, the rotary cutter (211) is located outside the guide rail groove (226); A cylindrical cam (205) is fixedly arranged, and an outer peripheral surface of the cylindrical cam (205) is provided with a cam groove (300) with double acting surfaces, the cam groove (300) comprises a pushing section and a return section; A double roller (206) is drivingly connected between the rotary cutter (211) and the cylindrical cam (205), and the double roller (206) and the cam groove (300) are abuttingly connected, the double roller (206) can move along the pushing section and the return section, when the double roller (206) moves along the pushing section, the rotary cutter (211) can be driven to pass through the knife slit (225) and enter the guide rail groove (226), so that the rotary cutter (211) is in the first state, and when the double roller (206) moves along the return section, the rotary cutter (211) can be driven to pass through the knife slit (225) and leave the guide rail groove (226), so that the rotary cutter (211) is in the second state.

2. The cigarette rod cutting device according to claim 1, wherein the rotary cutter (211) is disc-shaped, and a gear (210) is coaxially and fixedly connected thereto, the wheel body (229) is provided with a rack (209), a length direction of the rack (209) is arranged along an axis direction of the wheel body (229), and the gear (210) and the rack (209) are meshingly connected, so that the rotary cutter (211) rotates during the transition from the second state to the first state.

3. The cigarette rod cutting device according to claim 2, wherein ​ The circular cutter (211) is connected with a double push rod (207), the double push rod (207) comprises a first push rod and a second push rod, the circular cutter (211) is located between the first push rod and the second push rod, and The wheel body (229) is connected with a linear bearing, the first push rod and the second push rod slide through the linear bearing.

4. The cigarette rod cutting device according to claim 3, characterized in that, The double push rod (207) is installed with the double rollers (206) on the connecting rod frame (800) away from one end of the circular cutter (211), the cam groove (300) is provided with a double acting surface, the double rollers (206) are inserted into the cam groove (300) and abut against the double acting surface, so that when the double rollers (206) run in the push stroke section, the double rollers (206) push the circular cutter (211) towards the first state change, and when the double rollers (206) run in the return stroke section, the double rollers (206) push the circular cutter (211) towards the second state change.

5. The cigarette rod cutting device according to claim 4, characterized in that, The cam groove (300) further comprises a rest section, when the double rollers (206) are located in the rest section, the circular cutter (211) remains in the second state.

6. The cigarette rod cutting device according to claim 1, characterized in that, The cigarette rod cutting device further comprises a gas distribution disc (212), the gas distribution disc (212) has a negative pressure annular groove (215), the negative pressure annular groove (215) is arranged at the upper part of the gas distribution disc (212) and is arranged in position correspondence with the circular cutter (211), the wheel body (229) is provided with a suction hole (216) and an axial air hole (227), one end of the suction hole (216) is located in the guide rail groove (226), the other end of the suction hole (216) is communicated with the axial air hole (227), and one end of the axial air hole (227) is arranged in an open manner on the end face of the wheel body (229), The gas distribution disc (212) is arranged in close contact with the wheel body (229), and when the wheel body (229) rotates, the axial air hole (227) can be communicated with the negative pressure annular groove (215), so as to realize adsorption and fixation of the cigarette rod (100) located in the guide rail groove (226).

7. The cigarette rod cutting device according to claim 6, characterized in that, The gas distribution disc (212) further has a positive pressure annular groove (223), the positive pressure annular groove (223) is arranged at the lower part of the gas distribution disc (212), and the positive pressure annular groove (223) and the negative pressure annular groove (215) are symmetrically arranged about the horizontal section of the gas distribution disc (212), and the wheel body (229) can be rotated to make the axial air hole (227) communicated with the positive pressure annular groove (223), so as to clean and blow the guide rail groove (226).

8. The cigarette rod cutting device according to claim 7, characterized in that, the wheel body (229) further comprises a knife slit air hole (224), one end of the knife slit air hole (224) is in communication with the axial air hole (227), and the other end of the knife slit air hole (224) is located on the inner wall surface of the knife slit (225).

9. The cigarette rod cutting device according to any one of claims 1-8, characterized in that, the wheel body (229) has at least two knife slits (225), and the cigarette rod cutting device correspondingly comprises at least two circular cutters (211).

10. A method of cutting a cigarette rod using the cigarette rod cutting apparatus according to any one of claims 2 to 9, characterized in that, The circular cutter (211) is used to cut the cigarette rod (100), and during the cutting, the circular cutter (211) rotates and moves in a direction close to the cigarette rod (100).

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