Cigarette rod slitting device and working method

Abstract

The invention provides a tobacco rod slitting device and a working method, relates to the field of tobacco equipment, and aims to solve the problem that positioning constraint and circulation control of current tobacco rod slitting are difficult to meet the requirements by arranging a conveying assembly, a discharging wheel, a feeding push rod assembly, a positioning push rod assembly and a discharging push rod assembly. A plurality of discharging holes are formed in the end face of the discharging wheel and used for bearing the cigarette rods output from the end of the containing groove, the discharging wheel rotates around the axis of the discharging wheel so that the different discharging holes can be in butt joint with the containing groove in sequence, after the cigarette rods enter the discharging holes, a negative pressure system is activated, and the cigarette rods can be cut stably. The tobacco rods are stably fixed in the discharging hole through the negative pressure adsorption effect, the cutter connected to the lifting mechanism is arranged at the butt joint position of the containing groove and the discharging hole, the positioned tobacco rods are cut off, and the tobacco rod cutting device has the advantages that the cutting precision is improved, the notch deviation is reduced, stable discharging is ensured, residues are avoided, and the continuous operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco equipment, and more specifically to a tobacco stick cutting device and its working method. Background Technology

[0002] Heated cigarettes are typically composed of multiple composite base rods with different functions. During the manufacturing and R&D process, slitting equipment is needed to precisely cut long cigarette rods into shorter segments that meet process requirements. Existing slitting devices usually use a conveyor belt to transport the cigarette rods to a rotating feeding wheel or cutting drum station, and then work with a cutting mechanism to complete the fixed-length cutting.

[0003] Traditional devices rely on passive stops or unidirectional thrust when moving tobacco rods to the cutting holes, lacking precise bidirectional axial positioning of the tobacco rods. This causes the tobacco rods to easily move or shift axially at the moment of contact with the cutter, resulting in deviations in the cutting length and a decrease in the quality of the cut surface. In the unloading process after cutting, material often remains or gets stuck in the holes. The lack of precise active positioning constraints and stable material flow control throughout the tobacco rod cutting process affects the continuity of device operation and the dimensional accuracy of the finished product. Summary of the Invention

[0004] In view of this, the present invention provides a tobacco rod slitting device and working method, which can improve slitting accuracy, reduce cutting deviation, ensure stable feeding to avoid residue, and improve continuous operation efficiency.

[0005] The first objective of this invention is to provide a tobacco stick cutting device, which adopts the following solution: include: The conveying assembly includes a rotating conveyor belt and a conveyor trough plate fixed to the conveyor belt, the conveyor trough plate having a receiving groove for accommodating the cigarette rod; The feeding wheel has multiple feeding holes on its end face to receive the tobacco sticks output from the end of the receiving groove; one end of the feeding wheel is rotatably fitted with a negative pressure plate, one side of the negative pressure plate is connected to a negative pressure source through a negative pressure connector, and the other side is connected to the feeding holes through a negative pressure channel inside the feeding wheel, adsorbing the tobacco sticks located in the feeding holes; a cutter connected to a lifting mechanism is provided at the docking position between the receiving groove and the feeding hole, which is used to cut the tobacco sticks; The feeding pusher assembly includes a first pusher that extends and retracts parallel to the direction of the receiving groove, for pushing the smoke rod in the receiving groove into the feeding hole; The positioning push rod assembly includes a second push rod that extends and retracts parallel to the axis of the feeding hole, and is used to insert into the feeding hole to constrain the position of the smoke rod. The feeding pusher assembly includes a third pusher that extends and retracts parallel to the axis of the feeding hole, used to insert into the feeding hole to discharge the smoke rod.

[0006] Furthermore, the multiple feeding holes on the feeding wheel are circumferentially distributed around the axis of the feeding wheel, and the feeding holes are distributed along the axis of the feeding wheel and rotate around the axis as the feeding wheel rotates.

[0007] Furthermore, one end of the feeding wheel faces the other end of the receiving groove, and multiple feeding holes on the feeding wheel are evenly distributed upward along the ring of the feeding wheel. The conveying trough plate on the conveyor belt has various specifications, and different sizes of receiving grooves are opened on the conveying trough plates of different specifications to accommodate cigarette rods of different sizes. The conveyor belt and the feeding wheel run intermittently, and the feeding holes and receiving grooves are aligned cyclically.

[0008] Furthermore, the negative pressure plate has an elongated hole facing the feeding wheel. The elongated hole is connected to the negative pressure connector. When the negative pressure channel passes through the range of the elongated hole as it rotates with the feeding hole, it establishes a connection with the negative pressure source through the elongated hole. After passing through the range of the elongated hole, the negative pressure channel is disconnected from the negative pressure source.

[0009] Furthermore, the sidewall of the feeding hole is provided with an air inlet extending to the outer circumference of the feeding wheel, and the feeding hole is connected to the negative pressure channel through the adsorption channel.

[0010] Furthermore, the second push rod is coaxially distributed with the first push rod, and the end of the second push rod that abuts against the cigarette rod is provided with a contact detection element to identify the positioning status of the cigarette rod after it enters the feeding hole.

[0011] Furthermore, the end of the first push rod that contacts the smoke rod is an elastic end, and the feeding push rod assembly and the feeding push rod assembly are located outside the same end of the feeding wheel.

[0012] Furthermore, the inner ring of the conveyor belt is fitted with a drive wheel and a driven wheel, both of which are synchronous pulleys, and the inner ring of the conveyor belt is provided with synchronous belt teeth that cooperate with the synchronous pulleys.

[0013] A second objective of the present invention is to provide a method of operating a tobacco stick cutting device, comprising the following: The conveying assembly operates, transporting the cigarette rods to the designated position via the conveying trough, so that the receiving trough and the discharge hole on the discharge wheel are in a straight line. The end of the first push rod that contacts the tobacco stick is the elastic end. When the first push rod extends, it pushes the tobacco stick in the receiving groove into the feeding hole. The elastic end of the first push rod is partially compressed so that the tobacco stick is delivered into place. At the same time, the second push rod extends into the feeding hole as a stop / limiter to constrain and position the extension length of the tobacco stick. With the help of negative pressure adsorption, the tobacco stick is stably fixed in the hole. The lifting mechanism drives the cutter to cut the tobacco stick at the junction of the receiving groove and the feeding hole; After cutting, the feeding wheel rotates to carry the cut tobacco stick away from the cutting station. The third push rod extends and probes into the feeding hole to push out the cut tobacco stick inside the hole, completing the feeding. At the same time, the next feeding hole connects with the next receiving groove to wait for cutting.

[0014] Furthermore, after the cigarette sticks in the conveyor trough are partially cut, they are fed back along with the conveyor belt until all the cigarette sticks in the conveyor trough are discharged, and new cigarette sticks are fed into the conveyor trough.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: To address the current limitations of adequate positioning constraints and flow control in tobacco rod cutting, this invention achieves precise positioning, stable cutting, and reliable feeding of tobacco rods by incorporating a conveying assembly, a feeding wheel, a feeding pusher assembly, a positioning pusher assembly, and a feeding pusher assembly. This solves the problems of axial movement of tobacco rods, poor cut quality, and material residue in existing technologies. The feeding wheel has multiple feeding holes on its end face to receive tobacco rods output from the end of the receiving groove. The feeding wheel rotates around its axis, allowing different feeding holes to sequentially align with the receiving groove. When a tobacco rod enters a feeding hole, a negative pressure system is activated, using negative pressure adsorption to stably fix the tobacco rod within the feeding hole. At the connection point between the receiving groove and the feeding hole, a cutter connected to a lifting mechanism is installed to cut the positioned tobacco rod. This design offers advantages such as improved cutting accuracy, reduced cut deviation, stable feeding to avoid residue, and increased continuous operation efficiency.

[0016] The coaxial distribution of the second push rod and the first push rod ensures the straightness and stability of the cigarette rod during the pushing and positioning process, avoiding the influence of lateral forces. When the contact detection element at the end of the second push rod detects that the cigarette rod is in place, it can obtain a feedback signal, thereby accurately determining whether the cigarette rod has entered the feeding hole and reached the preset positioning state. This effectively solves the problem of inaccurate cigarette rod positioning, avoids the decrease in cutting accuracy or damage to the cigarette rod caused by positioning deviation, significantly improves the accuracy and reliability of cigarette rod cutting, and helps to reduce the scrap rate.

[0017] The end of the first push rod that contacts the tobacco stick is an elastic end, which provides flexible contact when the first push rod pushes the tobacco stick, effectively absorbing and dispersing the pushing force. When the second push rod abuts the end of the tobacco stick, the elastic end of the first push rod will contract. Cutting is performed with the second push rod as the reference. The cutting length is not affected by the length of the tobacco stick, which can eliminate the incoming material error of the tobacco stick and ensure the cutting accuracy. In addition, it can also avoid causing local stress concentration or physical damage to the tobacco stick, ensuring that the tobacco stick can be smoothly and without damage when it is pushed into the feeding hole, while improving the accuracy and stability of the tobacco stick positioning. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of the structure of the tobacco stick cutting device in one or more embodiments of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the conveying component in one or more embodiments of the present invention.

[0021] Figure 3 This is a schematic diagram of the conveying component and the positioning push rod component in one or more embodiments of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the feeding wheel and the conveying trough plate in one or more embodiments of the present invention.

[0023] Figure 5 This is a schematic diagram of the structure of the feeding wheel and push rod in one or more embodiments of the present invention.

[0024] Figure 6 This is a schematic diagram of the internal structure of the feed roller in one or more embodiments of the present invention.

[0025] The components are as follows: 1. Conveying assembly; 2. Conveyor belt; 3. Positioning push rod assembly; 4. Feeding wheel; 5. Cutter; 6. Lifting mechanism; 7. Feeding push rod assembly; 8. First push rod; 9. Feeding push rod assembly; 10. Conveying trough plate; 11. Drive wheel; 12. Gas distribution wheel; 13. Third push rod; 14. Feeding drive mechanism; 15. Receiving trough; 16. Feeding hole; 17. Negative pressure plate; 18. Negative pressure groove; 19. Negative pressure connector; 20. Negative pressure channel; 21. Adsorption channel; 22. Air inlet; 23. Second push rod. Detailed Implementation

[0026] Example 1 In a typical embodiment of the present invention, such as Figures 1-6 As shown, a tobacco stick cutting device is presented.

[0027] Traditional tobacco stick slitting devices often experience axial movement or displacement of the tobacco sticks upon contact with the cutting blade 5, leading to deviations in slitting length and a decrease in the quality of the cut surface. Furthermore, material residue or jamming often remains inside the hole during the unloading process, affecting the continuity of device operation and the dimensional accuracy of the finished product. Therefore, this embodiment provides a tobacco stick slitting device that receives the slitted tobacco sticks through the unloading hole 16 on the unloading roller 4. Negative pressure adsorption is used during reception to improve stability during slitting. A push rod is combined to achieve positioning and unloading, improving operational continuity and work efficiency.

[0028] like Figures 1-6 As shown, the tobacco stick slitting device mainly includes a conveying assembly 1, a feeding roller 4, a feeding push rod assembly 9, a positioning push rod assembly 3, and a feeding push rod assembly 7.

[0029] The conveying assembly 1 includes a rotating conveyor belt 2 and a conveying trough plate 10 fixed to the conveyor belt 2. The conveying trough plate 10 has a receiving groove 15 for accommodating tobacco sticks. The conveying assembly 1 can transport the tobacco sticks to be cut from the loading position to the cutting position. The end face of the unloading wheel 4 has a plurality of unloading holes 16 for receiving tobacco sticks output from the end of the receiving groove 15. The unloading holes 16 are used to temporarily accommodate one end of the tobacco stick. One end of the unloading wheel 4 is rotatably fitted with a negative pressure plate 17. One side of the negative pressure plate 17 is connected to a negative pressure source through a negative pressure connector 19, and the other side is connected to the unloading holes 16 through a negative pressure channel 20 inside the unloading wheel 4. The negative pressure plate 17 adsorbs the tobacco sticks located in the unloading holes 16 and stably fixes the tobacco sticks in the unloading holes 16. A cutter 5 connected to the lifting mechanism 6 is provided at the docking position between the receiving groove 15 and the unloading hole 16 of the unloading wheel 4 for cutting the tobacco sticks.

[0030] The feeding pusher assembly 9 includes a first pusher 8 that extends and retracts parallel to the direction of the receiving groove 15, for pushing the tobacco rod in the receiving groove 15 into the discharge hole 16; the positioning pusher assembly 3 includes a second pusher 13 that extends and retracts parallel to the axis of the discharge hole 16, for inserting into the discharge hole 16 to constrain the position of the tobacco rod; the discharge pusher assembly 7 includes a third pusher that extends and retracts parallel to the axis of the discharge hole 16, for inserting into the discharge hole 16 to discharge the tobacco rod.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the conveying assembly 1 transports the tobacco sticks to be slit from the loading area to the slitting station. The conveying assembly 1 can consist of a rotating conveyor belt 2 with multiple conveyor troughs 10 fixed on it. Each conveyor trough 10 has a receiving slot 15 for supporting and initially positioning the tobacco sticks. The conveyor belt 2 can be a flat belt, chain belt, or synchronous belt, driven by a motor to operate continuously or intermittently, thereby conveying the tobacco sticks along a preset path.

[0032] Multiple feeding holes 16 are provided on the end face of the feeding roller 4 to receive tobacco sticks output from the end of the receiving groove 15. The feeding roller 4 can rotate around its axis, so that different feeding holes 16 can be connected to the receiving groove 15 in sequence. When the tobacco stick enters the feeding hole 16, the negative pressure system is activated, and the negative pressure adsorption effect stably fixes one end of the tobacco stick in the feeding hole 16. At the docking position between the receiving groove 15 and the feeding hole 16, a cutter 5 connected to the lifting mechanism 6 is provided. After receiving a command, the cutter 5 is driven by the lifting mechanism 6 to cut the positioned tobacco stick. The feeding holes 16 can be evenly distributed along the circumference of the feeding roller 4.

[0033] The feeding pusher assembly 9 can actively push the tobacco sticks in the receiving groove 15 into the discharge hole 16. The extension and retraction direction of the first pusher 8 is parallel to the direction of the receiving groove 15. After the conveying assembly 1 transports the tobacco sticks to the designated position, the first pusher 8 extends, pushing the end of the tobacco stick facing the discharge wheel 4 out of the receiving groove 15, so that it enters the discharge hole 16. The first pusher 8 can be a rigid pusher driven by a cylinder and controlled by a proportional servo valve. Its stroke is preset to ensure that the tobacco stick can enter the discharge hole 16 according to the required length. The first pusher 8 can also be a mechanism that uses a servo motor to drive a lead screw and slider mechanism to move the pusher.

[0034] The positioning push rod assembly 3 is used to constrain and position the axial position of the tobacco rod after it enters the feeding hole 16. After the tobacco rod is pushed into the feeding hole 16 by the first push rod 8, the second push rod 13 extends and enters the feeding hole 16, abutting against the end of the tobacco rod from the other side, thereby creating a bidirectional limit on the axial position of the tobacco rod and preventing it from shifting during the cutting process. The second push rod 13 can be a push rod driven by a servo motor, and its extension position can be adjusted according to the length of the tobacco rod to achieve precise positioning.

[0035] After the tobacco rods are cut, the feeding pusher assembly 7 discharges the tobacco rods from the feeding hole 16. After the cutter 5 completes the cutting operation, the feeding wheel 4 rotates, carrying the cut tobacco rods away from the cutting station. At this time, the third pusher extends and enters the feeding hole 16, pushing out the cut tobacco rods from the hole, completing the feeding process. The third pusher can be a cylinder-driven pusher, whose extension stroke is sufficient to completely push the tobacco rods out of the feeding hole 16.

[0036] The tobacco stick slitting device in this embodiment achieves precise active positioning and stable flow of tobacco sticks during the slitting process through the coordinated action of the conveying component 1, the feeding roller 4, the feeding pusher component 9, the positioning pusher component 3, and the feeding pusher component 7. It can effectively solve problems such as axial movement of tobacco sticks, slitting length deviation, and feeding jamming in traditional slitting equipment, ensuring the accuracy of slitting length and the quality of the cut surface, thereby improving the continuity of device operation and the dimensional accuracy of the finished product.

[0037] like Figure 3 , Figure 4 and Figure 5 As shown, multiple feeding holes 16 on the feeding wheel 4 are distributed circumferentially around the axis of the feeding wheel 4. The feeding holes 16 are distributed along the axis of the feeding wheel 4 and rotate around the axis.

[0038] Multiple feeding holes 16 are evenly distributed circumferentially on the end face of the feeding roller 4. As the feeding roller 4 rotates, different feeding holes 16 are sequentially brought to positions where they align with the receiving groove 15 of the conveying trough plate 10, thus achieving continuous feeding of tobacco rods. The feeding holes 16 are evenly distributed on the circumference of the feeding roller 4 to ensure that each feeding hole 16 reaches its working position with the same interval time, thereby maintaining a stable production rhythm. Each feeding hole 16 is a through hole penetrating the entire feeding roller 4 along its axial direction, allowing the second push rod 13 and the third push rod to enter, ensuring smooth positioning and feeding of the tobacco rods. The feeding holes 16 rotate synchronously with the feeding roller 4. After being pushed into the feeding hole 16, the tobacco rod passes sequentially through the cutting station and the feeding station as the feeding roller 4 rotates, thus completing the entire slitting process.

[0039] To ensure that the receiving groove 15 in the conveying assembly 1 can be aligned with the feeding hole 16 on the feeding wheel 4, so as to achieve stable transmission and accurate cutting of the tobacco rods and optimize the cycle time and efficiency of the entire cutting process, one end of the feeding wheel 4 is oriented towards the receiving groove 15. The multiple feeding holes 16 provided on the feeding wheel 4 are evenly distributed upward along the circumference of the feeding wheel 4. The conveyor belt 2 and the feeding wheel 4 run intermittently, so that the feeding holes 16 are cyclically aligned with the receiving groove 15.

[0040] The feed side of the feeding roller 4 is directly opposite the discharge side of the receiving groove 15 on the conveying trough plate 10, thus providing a path for the tobacco rod to enter the feeding hole 16 from the receiving groove 15. Multiple feeding holes 16 are evenly distributed upwards along the circumference of the feeding roller 4, helping to ensure that each feeding hole 16 aligns with the receiving groove 15 at a consistent pace when rotating to a predetermined position, thereby providing a stable time window for subsequent tobacco rod pushing and cutting operations.

[0041] Meanwhile, both the conveyor belt 2 and the feeding roller 4 operate intermittently. The conveyor belt 2 stops after conveying a tobacco rod into a receiving slot 15, and the feeding roller 4 stops after rotating a feeding hole 16 to align with a receiving slot 15, ensuring cyclical alignment between the feeding hole 16 and the receiving slot 15. In each working cycle, a feeding hole 16 on the feeding roller 4 aligns with a receiving slot 15 on the conveyor trough plate 10. This ensures that the tobacco rod is accurately positioned before being pushed into the feeding hole 16 by the first push rod 8, providing a foundation for subsequent cutting operations.

[0042] It should be noted that in this embodiment, the conveyor trough plate 10 on the conveyor belt 2 has various specifications. Different specifications of conveyor trough plates 10 are provided with receiving grooves 15 of different sizes to accommodate tobacco sticks of different sizes. According to the input circumference of the tobacco stick, the tobacco stick can be placed in the receiving groove 15 of the corresponding size, and then the tobacco stick in the corresponding receiving groove 15 is conveyed to the position for cutting.

[0043] like Figure 5 and Figure 6 As shown, the tobacco rod is fixed in the feeding hole 16 by negative pressure adsorption to ensure its stability during the cutting and feeding process. However, if the negative pressure source is continuously connected to all feeding holes 16, it may lead to unnecessary energy consumption and make it difficult to achieve precise control of the adsorption state of each feeding hole 16 at different work positions, thereby affecting the cutting efficiency and the stable transmission of the tobacco rod.

[0044] In this embodiment, the negative pressure plate 17 has an elongated hole facing the feeding wheel 4, which communicates with the negative pressure connector 19. When the negative pressure channel 20 rotates along with the feeding hole 16 and passes through the elongated hole, it establishes communication with the negative pressure source. After passing through the elongated hole, the negative pressure channel 20 is disconnected from the negative pressure source. The elongated hole is arc-shaped, and its arc length covers the specific angle range required to establish negative pressure adsorption during the rotation of the feeding wheel 4. As the interface between the negative pressure source and the internal negative pressure channel 20 of the feeding wheel 4, the elongated hole can selectively control the on / off state of the negative pressure. The elongated hole forms an airtight connection with the negative pressure connector 19 through an internal channel or direct structure, introducing the negative pressure generated by the external negative pressure source into the interior of the negative pressure plate 17, and then transmitting it through the elongated hole, ensuring that the negative pressure can be stably and effectively transmitted to the negative pressure plate 17.

[0045] Specifically, the feeding wheel 4 has a negative pressure channel 20 inside, which communicates with each feeding hole 16. The negative pressure channel 20 moves synchronously with the rotation of the feeding wheel 4. When the feeding wheel 4 rotates to a certain position, so that the negative pressure channel 20 corresponding to the feeding hole 16 is aligned with the elongated hole on the negative pressure plate 17, an airtight connection is established between them. At this time, the negative pressure of the negative pressure source is transmitted to the feeding hole 16 through the negative pressure connector 19, the elongated hole, and then through the negative pressure channel 20, thereby achieving the adsorption of the tobacco stick. When the feeding wheel 4 continues to rotate, and the negative pressure channel 20 corresponding to the feeding hole 16 leaves the coverage area of ​​the elongated hole on the negative pressure plate 17, the airtight connection between the negative pressure channel 20 and the elongated hole is immediately interrupted, the negative pressure channel 20 is no longer connected to the negative pressure source, and the negative pressure state in the feeding hole 16 is released.

[0046] The elongated hole on the negative pressure plate 17 cooperates with the negative pressure channel 20 inside the feeding wheel 4 to achieve precise timing control of negative pressure adsorption of the feeding hole 16. Only when the feeding hole 16 rotates to the specific position where the tobacco rod needs to be adsorbed, its negative pressure channel 20 is connected to the elongated hole, thereby establishing negative pressure adsorption. Once the tobacco rod is cut or needs to be fed, the feeding hole 16 leaves the range of the elongated hole, and the negative pressure connection is cut off, avoiding continuous pressure supply from the negative pressure source to all feeding holes 16, and significantly reducing energy consumption.

[0047] like Figure 6 As shown, the sidewall of the feeding hole 16 has an air inlet 22 extending to the outer circumference of the feeding wheel 4. The feeding hole 16 is connected to the negative pressure channel 20 through the adsorption channel 21. When negative pressure acts inside the feeding hole 16, air can be introduced from the external environment of the feeding wheel 4, thereby forming an effective airflow and pressure difference within the feeding hole 16 to achieve adsorption of the tobacco stick. There can be one or more air inlets 22, and their shape can be circular, elliptical, or slit-shaped. They can be distributed along the axial or circumferential direction of the feeding hole 16 to optimize the adsorption effect. For example, multiple small holes can be evenly distributed along the length of the feeding hole 16 to ensure that the tobacco stick is subjected to uniform adsorption force throughout the entire adsorption area.

[0048] Simultaneously, the feeding hole 16 is connected to the negative pressure channel 20 via the adsorption channel 21, which effectively transfers the negative pressure in the negative pressure channel 20 to the inside of the feeding hole 16. This can be achieved through an independent channel inside the feeding wheel 4, or through a structure communicating with the feeding hole 16. For example, the adsorption channel 21 can be one or more radial holes connecting the inner wall of the feeding hole 16 to the negative pressure channel 20, ensuring that the negative pressure can act quickly and fully on the tobacco rod inside the feeding hole 16.

[0049] As the negative pressure channel 20 rotates along with the feeding hole 16 and passes through the elongated hole of the negative pressure plate 17, it establishes communication with the negative pressure source. The negative pressure can then be efficiently transferred to the inside of the feeding hole 16 through the adsorption channel 21. Simultaneously, external air is drawn into the feeding hole 16 through the air inlet 22 on the side wall, creating a uniform negative pressure adsorption force within the feeding hole 16. This ensures that the tobacco stick is stably and reliably adsorbed and positioned within the feeding hole 16, preventing tobacco stick wobbling or positional deviation caused by insufficient or uneven adsorption force, thus improving the accuracy and stability of tobacco stick cutting. It also facilitates rapid desorption after negative pressure cutting by the entry of external air, making subsequent tobacco stick discharge operations easier.

[0050] When the cigarette rod is pushed into the feeding hole 16 and positioned, in order to determine whether the cigarette rod has been fully inserted and is in the preset positioning state, a second push rod 13 is configured to be coaxially distributed with the first push rod 8. The end of the second push rod 13 that abuts against the cigarette rod is provided with a contact detection element to identify the positioning state of the cigarette rod after it has been inserted into the feeding hole 16.

[0051] The axis of the second push rod 13 coincides with or remains on the same center line as the axis of the first push rod 8. After the first push rod 8 pushes the tobacco stick into the feeding hole 16, the second push rod 13 can perform positioning operations along the same path or center line, thereby avoiding the tobacco stick from deviating or getting stuck during the pushing and positioning process, and improving the accuracy and stability of the tobacco stick positioning.

[0052] The contact detection element at the end of the second push rod 13 is used to monitor in real time whether the second push rod 13 has contacted the end of the cigarette stick, and further determine whether the cigarette stick has reached the preset positioning position. The contact detection element can be implemented in various forms. For example, it can be a microswitch, where the pressure of the cigarette stick triggers the microswitch to send an electrical signal when the second push rod 13 abuts against the end of the cigarette stick; it can also be a photoelectric sensor, with a transmitter and receiver placed at or near the end of the second push rod 13, which blocks or reflects the light beam when the cigarette stick is in position, thereby detecting the presence and position of the cigarette stick; or it can be a pressure sensor or force sensor integrated at the end of the second push rod 13, which outputs a signal when the push rod contacts the cigarette stick and reaches the preset pressure, indicating that the cigarette stick is in position. Through these detection elements, the system can obtain accurate feedback on the positioning status of the cigarette stick.

[0053] The coaxial distribution of the second push rod 13 and the first push rod 8 ensures the straightness and stability of the tobacco stick during the pushing and positioning process, avoiding the influence of lateral forces. When the contact detection element at the end of the tobacco stick detects that the tobacco stick is in place, the system can obtain a precise feedback signal, thereby accurately determining whether the tobacco stick has entered the feeding hole 16 and reached the preset positioning state.

[0054] The cigarette rod is pushed into the feeding hole 16 by the first push rod 8. The end of the first push rod 8 that contacts the cigarette rod is an elastic end. The feeding push rod assembly 7 and the feeding push rod assembly 9 are located outside the same end of the feeding wheel 4.

[0055] The elastic end of the first push rod 8 can be made of a material with a certain degree of elasticity (such as rubber, silicone, etc.), or a spring-loaded buffer mechanism, such as an elastic sleeve or elastic gasket, can be provided at this end to provide flexible contact when the first push rod 8 pushes the tobacco stick, effectively absorbing and dispersing the pushing force. When the second push rod 13 abuts against the end of the tobacco stick, the elastic end of the first push rod 8 will contract, and the cutting will be performed with the second push rod 13 as the reference. The cutting length is not affected by the length of the tobacco stick, which can eliminate the incoming material error of the tobacco stick and ensure the cutting accuracy. In addition, it can also avoid causing local stress concentration or physical damage to the tobacco stick. This ensures that the tobacco stick can be smoothly and without damage when it is pushed into the feeding hole 16, while improving the accuracy and stability of the tobacco stick positioning.

[0056] The feeding push rod assembly 7 and the feeding push rod assembly 9 are arranged on the same outer side of the feeding wheel 4. The integrated spatial arrangement helps to optimize the overall structure of the equipment, reduce the required installation space, and make the entire tobacco rod slitting device more compact.

[0057] The inner ring of the conveyor belt 2 is fitted with a drive wheel 11 and a driven wheel, both of which are synchronous pulleys. The inner ring of the conveyor belt 2 is equipped with synchronous belt teeth that mate with the synchronous pulleys. The drive wheel 11 is driven by a motor, providing power to the conveyor belt 2 and causing it to rotate along a predetermined path. The driven wheel rotates under the drive wheel 11, supporting the conveyor belt 2, adjusting its tension, or changing its running direction. The cooperation between the drive wheel 11 and the driven wheel ensures the continuous and stable movement of the conveyor belt 2, realizing material conveying. To improve the accuracy and stability of the conveying, both the drive wheel 11 and the driven wheel are synchronous pulleys. The synchronous pulleys transmit power and motion through precise meshing of teeth, thereby avoiding slippage and ensuring synchronous movement between the drive wheel 11 and the driven wheel, as well as between the drive wheel and the conveyor belt 2, providing highly accurate speed ratio and position control.

[0058] Example 2 In another typical embodiment of the present invention, such as Figures 1-6 As shown, a method for operating a tobacco stick cutting device is provided. Using the tobacco stick cutting device as described in Example 1, the method includes the following steps: When the conveying assembly 1 operates, it transports the cigarette rod to the designated position through the conveying trough plate 10, so that the receiving trough 15 and the feeding hole 16 on the feeding wheel 4 are in a straight line. The end of the first push rod 8 that contacts the tobacco stick is an elastic end. When the first push rod 8 extends, it pushes the tobacco stick in the receiving groove 15 into the feeding hole 16. The elastic end of the first push rod 8 is partially compressed so that the tobacco stick is delivered into place. At the same time, the second push rod 13 extends into the feeding hole 16 as a stop / limiter to constrain and position the extension length of the tobacco stick. With the help of negative pressure adsorption, the tobacco stick is stably fixed in the hole. The lifting mechanism 6 drives the cutter 5 to cut the cigarette rod at the junction of the receiving groove 15 and the discharge hole 16. After cutting, the feeding wheel 4 rotates to take the cut tobacco stick away from the cutting station, and the third push rod extends and probes into the feeding hole 16 to push out the cut tobacco stick in the hole, completing the feeding; at the same time, the next feeding hole 16 connects with the next receiving groove 15 to wait for cutting.

[0059] After the cigarette rods in the conveyor trough 10 are partially cut, they are fed back along the conveyor belt 2 until all the cigarette rods in the conveyor trough 10 are discharged, and new cigarette rods are fed into the conveyor trough 10.

[0060] After the tobacco stick is partially cut off by the cutter 5 at the junction of the receiving groove 15 and the discharge hole 16, a certain length of the remaining tobacco stick will still remain in the conveyor trough 10. This partially cut tobacco stick will remain in the original conveyor trough 10 and, with the rotation of the conveyor belt 2, will be brought back to the cutting station. It will then serve as a unit awaiting processing, ready for the next cutting operation. The cyclic feeding mechanism following the conveyor belt 2 ensures continuous processing of the same tobacco stick. The cyclic feeding process will continue until the tobacco stick in the conveyor trough 10 is completely cut off and discharged. Complete discharge means that the remaining length of the tobacco stick is insufficient for any effective cutting, or it has been completely cut into the required small segments and discharged by the discharge pusher assembly 7.

[0061] Specifically, on a cigarette stick production line, long cigarette sticks need to be precisely cut into shorter segments of specific lengths. The cigarette stick cutting device works in a coordinated manner to achieve stable conveying, precise positioning, efficient cutting, and reliable unloading of the cigarette sticks.

[0062] First, the conveyor assembly 1 begins operation. The inner ring of the conveyor belt 2 is fitted with a drive wheel 11 and a driven wheel, both of which are synchronous pulleys. The inner ring of the conveyor belt 2 is equipped with synchronous belt teeth that mate with the synchronous pulleys, ensuring the precise rotation of the conveyor belt 2. Long tobacco sticks are placed on a conveyor trough plate 10 fixed to the conveyor belt 2. The conveyor trough plate 10 has a receiving groove 15 for accommodating the tobacco sticks. The conveyor assembly 1 transports the tobacco sticks to a designated position, aligning the receiving groove 15 with a discharge hole 16 on the discharge wheel 4.

[0063] At this time, the conveyor belt 2 and the feeding wheel 4 operate intermittently to ensure that the feeding hole 16 and the receiving groove 15 are aligned cyclically. One end of the feeding wheel 4 faces the end of the receiving groove 15, and multiple feeding holes 16 are opened on its end face. These feeding holes 16 are evenly distributed around the axis of the feeding wheel 4 and are distributed along the axis of the feeding wheel 4 upward, following the feeding wheel 4 as it rotates around the axis.

[0064] Once the receiving groove 15 is aligned with the feeding hole 16, the first push rod 8 in the feeding push rod assembly 9 begins to move. The first push rod 8 extends and retracts parallel to the receiving groove 15, with its end in contact with the tobacco stick being an elastic end. The first push rod 8 extends, smoothly pushing the tobacco stick from the receiving groove 15 into the feeding hole 16. The elastic end of the first push rod 8 is partially compressed to ensure the tobacco stick is properly positioned. Simultaneously, the second push rod 13 in the positioning push rod assembly 3 also begins to move. The second push rod 13 is coaxial with the first push rod 8, extending and retracting parallel to the axis of the feeding hole 16, protruding into the feeding hole 16 as a stop to constrain and position the length of the tobacco stick. The end of the second push rod 13 that abuts against the tobacco stick is equipped with a contact detection element to identify the positioning status of the tobacco stick after it enters the feeding hole 16, ensuring that the tobacco stick reaches the preset cutting position.

[0065] As the tobacco stick is pushed by the first push rod 8 and positioned by the second push rod 13, the negative pressure plate 17, which rotates and engages with one end of the feeding wheel 4, comes into play. The negative pressure plate 17 has an elongated hole facing the feeding wheel 4, which connects to a negative pressure connector 19, which is connected to a negative pressure source. The negative pressure channel 20 inside the feeding wheel 4 connects to the feeding hole 16. An air inlet 22 extending to the outer circumference of the feeding wheel 4 is located on the side wall of the feeding hole 16. The feeding hole 16 connects to the negative pressure channel 20 via an adsorption channel 21. When the negative pressure channel 20 passes through the elongated hole as it rotates with the feeding hole 16, it establishes a connection with the negative pressure source through the elongated hole, adsorbing the tobacco stick located within the feeding hole 16 and stabilizing it within the hole. This combination of bidirectional push rod positioning and negative pressure adsorption effectively solves the problem of axial movement or displacement of the tobacco stick at the moment of contact with the cutter 5 in existing technologies, avoiding deviations in cutting length and a decrease in the quality of the cut surface.

[0066] After the tobacco stick is precisely positioned and fixed by suction, the cutter 5 connected to the lifting mechanism 6 is activated. The cutter 5 is located at the docking position between the receiving groove 15 and the feeding hole 16, and is driven by the lifting mechanism 6 to cut the tobacco stick at the predetermined cutting point.

[0067] After cutting, the feeding wheel 4 rotates, carrying the cut tobacco sticks away from the cutting station. At this time, the negative pressure channel 20 passes through the elongated hole, and its connection with the negative pressure source is cut off, releasing the adsorption on the tobacco sticks. The third pusher in the feeding pusher assembly 7 begins to move. The third pusher extends and retracts parallel to the axis of the feeding hole 16, probing into the feeding hole 16 and pushing out the cut tobacco sticks inside the hole, completing the feeding. The feeding pusher assembly 9 and the feeding pusher assembly 7 are both located outside the same end of the feeding wheel 4, resulting in a compact structure.

[0068] While the current tobacco rod is being fed, the feeding wheel 4 continues to rotate, causing the next feeding hole 16 to align with the next receiving groove 15, ready for cutting. After the tobacco rods in the conveyor trough 10 are partially cut, they are fed back along the conveyor belt 2 in a cycle until all the tobacco rods in the conveyor trough 10 are discharged. Then, new tobacco rods are fed into the conveyor trough 10, achieving continuous and efficient tobacco rod cutting operations.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tobacco stick cutting device, characterized in that, include: The conveying assembly includes a rotating conveyor belt and a conveyor trough plate fixed to the conveyor belt, the conveyor trough plate having a receiving groove for accommodating the cigarette rod; The feeding wheel has multiple feeding holes on its end face to receive the tobacco sticks output from the end of the receiving groove; one end of the feeding wheel is rotatably fitted with a negative pressure plate, one side of the negative pressure plate is connected to a negative pressure source through a negative pressure connector, and the other side is connected to the feeding holes through a negative pressure channel inside the feeding wheel, adsorbing the tobacco sticks located in the feeding holes; a cutter connected to a lifting mechanism is provided at the docking position between the receiving groove and the feeding hole, which is used to cut the tobacco sticks; The feeding pusher assembly includes a first pusher that extends and retracts parallel to the direction of the receiving groove, for pushing the smoke rod in the receiving groove into the feeding hole; The positioning push rod assembly includes a second push rod that extends and retracts parallel to the axis of the feeding hole, and is used to insert into the feeding hole to constrain the position of the smoke rod. The feeding pusher assembly includes a third pusher that extends and retracts parallel to the axis of the feeding hole, used to insert into the feeding hole to discharge the smoke rod.

2. The tobacco stick cutting device as described in claim 1, characterized in that, The multiple feeding holes on the feeding wheel are distributed circumferentially around the axis of the feeding wheel, and are distributed along the axis of the feeding wheel upwards, and follow the feeding wheel as it rotates around the axis.

3. The tobacco stick cutting device as described in claim 2, characterized in that, One end of the feeding wheel faces the other end of the receiving groove. Multiple feeding holes on the feeding wheel are evenly distributed upward along the circumference of the feeding wheel. The conveyor trough plate on the conveyor belt has various specifications. Different sizes of receiving grooves are opened on the conveyor trough plates of different specifications to accommodate cigarette rods of different sizes. The conveyor belt and the feeding wheel run intermittently, and the feeding holes and receiving grooves are aligned cyclically.

4. The tobacco stick cutting device as described in claim 1, 2, or 3, characterized in that, The negative pressure plate has an elongated hole facing the feeding wheel. The elongated hole is connected to the negative pressure connector. When the negative pressure channel passes through the range of the elongated hole as it rotates with the feeding hole, it establishes a connection with the negative pressure source through the elongated hole. After passing through the range of the elongated hole, the negative pressure channel is disconnected from the negative pressure source.

5. The tobacco stick cutting device as described in claim 4, characterized in that, The sidewall of the feeding hole is provided with an air inlet extending to the outer circumference of the feeding wheel, and the feeding hole is connected to the negative pressure channel through the adsorption channel.

6. The tobacco stick cutting device as described in claim 1, characterized in that, The second push rod is coaxially distributed with the first push rod. The end of the second push rod that abuts against the cigarette rod is provided with a contact detection element to identify the positioning status of the cigarette rod after it enters the feeding hole.

7. The tobacco stick cutting device as described in claim 6, characterized in that, The end of the first push rod that contacts the smoke rod is an elastic end, and the feeding push rod assembly and the feeding push rod assembly are located outside the same end of the feeding wheel.

8. The tobacco stick cutting device as described in claim 1, characterized in that, The inner ring of the conveyor belt is fitted with a drive wheel and a driven wheel, both of which are synchronous pulleys. The inner ring of the conveyor belt is provided with synchronous belt teeth that cooperate with the synchronous pulleys.

9. A method of operating a tobacco stick cutting device, comprising using the tobacco stick cutting device as described in any one of claims 1-8, including: The conveying assembly operates, transporting the cigarette rods to the designated position via the conveying trough, so that the receiving trough and the discharge hole on the discharge wheel are in a straight line. The end of the first push rod that contacts the tobacco stick is the elastic end. When the first push rod extends, it pushes the tobacco stick in the receiving groove into the feeding hole. The elastic end of the first push rod is partially compressed so that the tobacco stick is delivered into place. At the same time, the second push rod extends into the feeding hole as a stop / limiter to constrain and position the extension length of the tobacco stick. With the help of negative pressure adsorption, the tobacco stick is stably fixed in the hole. The lifting mechanism drives the cutter to cut the tobacco stick at the junction of the receiving groove and the feeding hole; After cutting, the feeding wheel rotates to carry the cut tobacco stick away from the cutting station. The third push rod extends and probes into the feeding hole to push out the cut tobacco stick inside the hole, completing the feeding. At the same time, the next feeding hole connects with the next receiving groove to wait for cutting.

10. The working method of the tobacco stick cutting device as described in claim 9, characterized in that, After the cigarette sticks in the conveyor trough are partially cut, they are fed back along the conveyor belt until all the cigarette sticks in the conveyor trough are discharged, and new cigarette sticks are fed into the conveyor trough.

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