Cigarette rod cutting device

Abstract

The utility model belongs to cigarette production technical field discloses a kind of cigarette rod cutting device and cigarette rod cutting method.The device includes wheel body, round cutter and cylindrical cam, wheel body is rotationally arranged around axis direction, and the outer circumferential surface of wheel body is provided with guide rail groove and knife slit, round cutter is movably arranged along axis direction, and it is rotationally arranged synchronously with wheel body, and the cam groove of cylindrical cam is provided with double action surface, and it is cooperated with the double roller connected with round cutter, can drive round cutter into guide rail groove, and it can drive round cutter to leave guide rail groove.Compared with hooke's cutter disc of inclination type installation, round cutter is along linear direction movement, thus assembly requirement precision is lower, assembly and maintenance difficulty is lower, interference is not easy to produce due to assembly failure.At the same time, inertia and vibration of round cutter are smaller, and motion stability is high, position deviation is not easy to appear due to long time work, can guarantee that incision is flush and perpendicular to cigarette rod axis, it is favorable to guarantee the quality of product.

Description

Technical Field

[0001] This utility model relates to the field of cigarette production technology, and in particular to a cigarette pack cutting device. 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 pack cutting device to at least solve one of the above-mentioned technical problems. Utility Model Content

[0005] The purpose 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 cigarette strip cutting device further includes a support frame, which is fixedly mounted and connected to a compression spring, the compression spring being used to apply a spring force toward the wheel body to the air distribution plate.

[0020] In some embodiments, the air distribution plate further has a positive pressure annular groove, the positive pressure annular groove and the negative pressure annular groove are spaced apart along the circumferential direction of the air distribution plate, and 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.

[0021] 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.

[0022] 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.

[0023] The beneficial effects of this utility model are:

[0024] In this cigarette cutting device, compared to the 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, making assembly and maintenance easier and reducing the likelihood of interference between the circular cutter and the wheel due to assembly errors. Furthermore, the circular cutter has less inertia and vibration during movement than the Hooke-type cutter head, resulting in higher motion stability. It is less prone to positional deviations during prolonged operation, ensuring a flush cut and perpendicularity to the cigarette pack axis, thus contributing to product quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the principle of using a Hooke-type cutter head for cutting tobacco strips in existing technology;

[0026] Figure 2 This is a partial three-dimensional view of the cigarette pack cutting device in this utility model;

[0027] Figure 3 This is a schematic diagram of the transmission connection between the cam groove and the circular cutter in this utility model;

[0028] Figure 4 This is a schematic diagram showing the position between the tobacco stick and the circular cutter in this utility model;

[0029] Figure 5This is an assembly diagram of the drive shaft, support, and bracket in this utility model;

[0030] Figure 6 The cigarette pack cutting device of this utility model is along Figure 4 A cross-sectional view along the AA direction.

[0031] In the picture:

[0032] 100. Tobacco stick; 101. Tube; 102. Hooker blade; 103. Cutter; 104. Mouthpiece;

[0033] 200. Drive 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;

[0034] 300. Cam groove;

[0035] 400, Horizontal axis;

[0036] 500, semi-circular keyway; 501, first screw hole; 502, semi-circular key; 503, pull screw hole; 504, second screw hole. Detailed Implementation

[0037] 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 present 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, not the entire structure.

[0038] In the description of this utility model, 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 utility model based on the specific circumstances.

[0039] 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.

[0040] 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] like Figure 1 As 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.

[0042] 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. hWhen 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.

[0043] 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, this utility model 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.

[0044] Specifically, such as Figures 2 to 4 As 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.

[0045] 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 and the guide groove 226 are connected, so that the circular cutter 211 can enter and exit the guide groove 226 through the slit 225. In this utility model, 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.

[0046] Reference Figure 3As 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.

[0047] 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 t The 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.

[0048] 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.

[0049] 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.

[0050] Continue to refer to Figure 2 , Figure 3As 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.

[0051] 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.

[0052] like Figure 2 As 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.

[0053] 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.

[0054] More specifically, such as Figure 3As 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 the specific positioning requirements of the tobacco stick 100, and therefore, this utility model does not impose specific limitations on them.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 can accommodate the power structure, such as the drive belt, within itself, 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.

[0064] 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.

[0065] 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.

[0066] During the cigarette cutting process, the circular cutter 211 rotates and moves linearly in a direction close to the cigarette 100. The combination of 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 100. The rotation also increases the stability of the circular cutter 211, thereby ensuring the flatness of the cut and optimizing the quality of the cut product.

[0067] 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.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cigarette pack cutting device, characterized in that, include: A wheel body (229) is rotatable about an axis. The outer circumferential surface of the wheel body (229) is provided with a guide groove (226) and a cutter slit (225). The depth direction of the guide groove (226) is arranged along the radial direction of the wheel body (229), and the length direction of the guide groove (226) is arranged along the circumferential direction of the wheel body (229). The depth direction of the cutter slit (225) is arranged along the radial direction of the wheel body (229), and the length direction of the cutter slit (225) is arranged along the axial direction of the wheel body (229). The cutter slit (225) is connected to the guide groove (226). A circular cutter (211) is movably disposed along the axis of the wheel (229) and rotates synchronously with the wheel (229) about the axis of the wheel (229). The circular cutter (211) has a first state and a second state. In the first state, the circular cutter (211) is located in the guide groove (226) to cut the tobacco strip (100). In the second state, the circular cutter (211) is located outside the guide groove (226). A cylindrical cam (205) is fixedly installed, and the outer peripheral surface of the cylindrical cam (205) is provided with a cam groove (300) with a double working surface, the cam groove (300) including a push section and a return section; A double roller (206) is driven between the circular cutter (211) and the cylindrical cam (205), and the double roller (206) and the cam groove (300) are in abutting connection. The double roller (206) can move along the push stroke section and the return stroke section. When the double roller (206) moves in the push stroke section, it can drive the circular cutter (211) to enter the guide groove (226) through the cutter slit (225) so that the circular cutter (211) is in the first state. When the double roller (206) moves in the return stroke section, it can drive the circular cutter (211) to leave the guide groove (226) through the cutter slit (225) so that the circular cutter (211) is in the second state.

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

3. The cigarette pack cutting device according to claim 2, characterized in that, The circular cutter (211) is connected to a double push rod (207), the double push rod (207) including a first push rod and a second push rod, the circular cutter (211) being located between the first push rod and the second push rod, and, The wheel body (229) is connected to a linear bearing, and the first push rod and the second push rod slide through the linear bearing.

4. The cigarette pack cutting device according to claim 3, characterized in that, The double push rod (207) is mounted on a connecting rod frame (800) at the end away from the circular cutter (211) with double rollers (206) installed on it. A double working surface is provided in the cam groove (300). The double rollers (206) are inserted into the cam groove (300) and abut against the double working surface, so that when the double rollers (206) are running in the push stroke section, the double rollers (206) push the circular cutter (211) toward the first state. When the double rollers (206) are running in the return stroke section, the double rollers (206) push the circular cutter (211) toward the second state.

5. The cigarette pack cutting device according to claim 4, characterized in that, The cam groove (300) also includes a rest section, and the circular cutter (211) remains in the second state when the double roller (206) is located in the rest section.

6. The cigarette pack cutting device according to claim 1, characterized in that, The cigarette strip cutting device further includes a gas distribution plate (212), which has a negative pressure annular groove (215). The negative pressure annular groove (215) is located on the upper part of the gas distribution plate (212) and is positioned corresponding to 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), and the other end of the suction hole (216) is connected to the axial air hole (227). One end of the axial air hole (227) is open on the end face of the wheel body (229). The air distribution plate (212) is fitted to the wheel body (229), and when the wheel body (229) rotates, the axial air hole (227) can communicate with the negative pressure annular groove (215) to adsorb and fix the smoke bar (100) located in the guide rail groove (226).

7. The cigarette pack cutting device according to claim 6, characterized in that, The air distribution plate (212) also has a positive pressure annular groove (223), which is located at the lower part of the air distribution plate (212). The positive pressure annular groove (223) and the negative pressure annular groove (215) are symmetrically arranged about the horizontal cross section of the air distribution plate (212). The wheel (229) can rotate to make the axial air hole (227) and the positive pressure annular groove (223) communicate to blow clean the guide rail groove (226).

8. The cigarette pack cutting device according to claim 6, characterized in that, The cigarette strip cutting device also includes a support frame, which is fixedly mounted and connected to a compression spring (222). The compression spring (222) is used to apply a spring force toward the wheel body (229) to the gas distribution plate (212).

9. The cigarette pack cutting device according to claim 7, characterized in that, The wheel body (229) also 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).

10. The cigarette pack cutting device according to any one of claims 1-9, characterized in that, The wheel (229) has at least two blade slits (225), and the cigarette strip cutting device includes at least two circular cutters (211).

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