Cigarette pack extraction apparatus and method

Abstract

The application relates to a cigarette packet extracting device and method. The cigarette packet extracting device comprises a first mounting bracket, a driving mechanism, a crank, a connecting rod and an executing mechanism. The first mounting bracket is used for mounting on the rack of a cigarette packet extracting conveying belt. The driving mechanism is mounted on the first mounting bracket. The driving mechanism is in driving connection with the crank, and the connecting rod is in driving connection with the crank. The executing mechanism comprises a hook hand which is in driving connection with the connecting rod so that the driving mechanism drives the hook hand to reciprocate through the crank and the connecting rod. The cigarette packet extracting device and method have the advantages of high stability, long service life and high machining precision.

Description

Technical Field

[0001] This application relates to the field of cigarette processing equipment technology, and in particular to a cigarette pack extraction device and method. Background Technology

[0002] In the production of fully open hard-pack cigarette packaging, the stable extraction of cigarette packs from the rotary station channel is a key process to ensure the production line's cycle time and the quality of finished products.

[0003] Currently, the cigarette pack extraction device in fully open hard-pack packaging machines generally adopts a servo motor-driven synchronous belt structure. The cigarette packs are pulled out of the rotary station channel by the guide teeth on the synchronous belt to complete the material handover. In actual mass production applications, cigarette jamming at the handover point caused by upstream equipment failure can subject the synchronous belt to instantaneous impact force, easily leading to synchronous belt breakage or guide tooth detachment, disrupting production line continuity. Replacing the synchronous belt is time-consuming, and the replacement space is narrow, requiring the removal of multiple accessories, resulting in poor stability and high maintenance costs. Furthermore, the elastic deformation and tooth wear of the synchronous belt can cause deviations in the tooth pitch of the guide teeth, resulting in large deviations in the cigarette pack extraction position, seriously affecting the appearance of the cigarette packs and the pass rate of cigarette quality. Summary of the Invention

[0004] Therefore, it is necessary to provide a cigarette pack extraction device and method to address the problems of poor stability, high maintenance costs, and impact on the appearance of cigarette packs and the quality of cigarettes caused by cigarette pack extraction devices.

[0005] This invention provides a cigarette pack extraction device, comprising: The first mounting bracket is used to mount the cigarette pack extraction conveyor belt onto the frame. The drive mechanism is mounted on the first mounting bracket; A crank and a connecting rod, wherein the drive mechanism is driven by the crank and the connecting rod is driven by the crank; An actuator, comprising a hook connected to the connecting rod, such that the drive mechanism drives the hook to reciprocate via the crank and the connecting rod.

[0006] In one embodiment, the actuator further includes a slide rail and a sliding bracket, the slide rail being connected to the first mounting bracket, the sliding bracket being slidably disposed on the slide rail, the end of the connecting rod away from the crank being movably connected to the sliding bracket, and the hook being connected to the sliding bracket.

[0007] In one embodiment, the actuator further includes a pulley rotatably disposed on the sliding bracket and movably connected to the slide rail.

[0008] In one embodiment, the sliding bracket is provided with a pin, and the end of the connecting rod away from the crank is movably connected to the pin.

[0009] In one embodiment, the cigarette pack extraction device further includes a first joint bearing and a second joint bearing, wherein the crank and the connecting rod are movably connected via the first joint bearing, and the connecting rod and the sliding bracket are movably connected via the second joint bearing.

[0010] In one embodiment, the drive mechanism includes a second mounting bracket and a drive unit. The second mounting bracket is connected to the first mounting bracket, and the drive unit is mounted on the second mounting bracket. The drive unit is driven connected to one end of the crank, and the other end of the crank is driven connected to one end of the connecting rod, and the other end of the connecting rod is driven connected to the hook.

[0011] In one embodiment, the drive mechanism further includes a coupling through which the drive unit is connected to the crank.

[0012] In one embodiment, the cigarette pack extraction device further includes a position detection module, which is mounted on the slide rail and is used to detect the position of the sliding bracket on the slide rail.

[0013] In one embodiment, the cigarette pack extraction device further includes a controller electrically connected to the position detection module and the drive mechanism.

[0014] The present invention also provides a method for extracting a cigarette pack, applicable to the cigarette pack extraction device of any of the above embodiments, comprising the following steps: Upon receiving the signal that the cigarette pack is in place, a command is sent to the drive mechanism. The drive mechanism drives the hook to perform reciprocating linear motion via the crank and connecting rod, enabling the hook to complete the cigarette pack extraction action. After the cigarette pack is extracted, a reset signal is sent back to the hook, waiting for the next cigarette pack to be in place signal.

[0015] The aforementioned cigarette pack extraction device and method, mounted on the frame of the conveyor belt via a first mounting bracket, uses a drive mechanism that drives a hook to reciprocate through a crank and connecting rod. This transfers cigarette packs from the rotary station channel onto the conveyor belt, eliminating the problems of elastic deformation and tooth wear caused by long-term operation that exist with traditional synchronous belts. This significantly improves the position control accuracy of the cigarette pack extraction device, effectively ensuring the appearance of the cigarette packs and the quality of the finished cigarettes. Furthermore, this embodiment directly drives the crank through the drive mechanism, simplifying intermediate transmission links, reducing transmission energy loss, and the rigid transmission structure can withstand the instantaneous impact force under cigarette jamming conditions, greatly improving the stability and service life of the mechanism. Moreover, the crank and connecting rod can be optimized through parameter optimization to achieve a compact overall structure, adapting to the narrow installation space of fully open hard-pack packaging machines. It also eliminates the need for high-wear synchronous belt components, eliminating the need for frequent shutdowns to replace vulnerable parts and remove accessories, significantly shortening equipment maintenance time, reducing maintenance costs and operator skill requirements, and effectively ensuring the continuous operation capability and equipment efficiency of the cigarette packaging production line. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of the cigarette pack extraction device described in the embodiments of this application.

[0017] Figure 2 and Figure 3 This is a schematic diagram of the structure of the cigarette pack extraction device described in the embodiments of this application.

[0018] Figure 4 and Figure 5 This is a schematic diagram of the actuator of the cigarette pack extraction device described in the embodiments of this application.

[0019] Icon labels: 100. First mounting bracket; 200, Drive mechanism; 210, Second mounting bracket; 211, Second fastener; 220, Drive unit; 230, Coupling; 300. Transmission mechanism; 310. Crank; 320. Connecting rod; 330. First joint bearing; 340. Second joint bearing; 400. Actuator; 410. Hook; 411. First fastener; 420. Slide rail; 430. Sliding bracket; 431. Pin; 432. Pulley mounting bracket; 433. Third fastener; 440. Pulley; 441. Fourth fastener; 10. Conveyor belt; 20. Rotary station passage; 21. Upper belt; 22. Lower belt. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0026] See Figure 1 and Figure 2 The diagram shows a schematic of the structure of a cigarette pack extraction device according to an embodiment of this application. The cigarette pack extraction device includes a first mounting bracket 100, a drive mechanism 200, a transmission mechanism 300, and an actuator 400. The first mounting bracket 100 is used to mount the cigarette pack extraction conveyor belt 10 onto its frame. The drive mechanism 200 is mounted on the first mounting bracket 100.

[0027] The transmission mechanism 300 includes a crank 310 and a connecting rod 320. The drive mechanism 200 is drivenly connected to the crank 310, and the connecting rod 320 is drivenly connected to the crank 310.

[0028] The actuator 400 includes a hook 410, which is driven to connect to the connecting rod 320 so that the drive mechanism 200 drives the hook 410 to reciprocate through the crank 310 and the connecting rod 320.

[0029] In one embodiment, such as Figure 1 As shown, a rotary station channel 20 is formed between the upper belt 21 and the lower belt 22. The cigarette pack extraction device is installed on the conveyor belt 10. The hook 410 is facing the outlet side of the rotary station channel 20. During the reciprocating motion, it extends into the rotary station channel 20 and then pulls the cigarette pack in the rotary station channel 20 onto the conveyor belt 10, thus completing the cigarette pack extraction process.

[0030] The cigarette pack extraction device described in this embodiment is mounted on the frame of the conveyor belt via a first mounting bracket 100. The drive mechanism 200 drives the hook 410 to reciprocate through the crank 310 and connecting rod 320, thereby transferring the cigarette packs in the rotary station channel 20 onto the conveyor belt. This transmission mechanism 300, composed of the crank 310 and connecting rod 320, eliminates the problems of elastic deformation and tooth pitch deviation caused by long-term tooth wear in traditional synchronous belts, significantly improving the position control accuracy of the cigarette pack extraction device and effectively ensuring the appearance of the cigarette packs and the quality of the finished cigarettes. Furthermore, this embodiment directly drives the crank 310 through the drive mechanism 200, simplifying the intermediate transmission links, reducing transmission energy loss, and the rigid transmission structure can withstand the instantaneous impact force under cigarette jamming conditions, greatly improving the operational stability and service life of the mechanism.

[0031] The cigarette pack extraction device described in this application embodiment can also have its overall structure made more compact through parameter optimization of the crank 310 and connecting rod 320, making it suitable for the narrow installation space of the fully open hard box packaging machine. At the same time, it eliminates the need for high-wear synchronous belt components, eliminating the need for frequent machine shutdowns to replace vulnerable parts and remove accessories, significantly shortening equipment maintenance time, reducing maintenance costs and operator skill requirements, effectively ensuring the continuous operation capability and equipment operating efficiency of the cigarette packaging production line, and fully meeting the intelligent and automated production needs of cigarette enterprises for high speed, stability, and low maintenance.

[0032] In an exemplary embodiment, the conveyor belt 10 is provided with baffle teeth. After the cigarette pack extraction device extracts the cigarette pack from the rotary station channel 20 to the conveyor belt 10, it limits the cigarette pack by the baffle teeth.

[0033] Combination Figure 3 The diagram shows a schematic of the actuator 400 of a cigarette pack extraction device according to one embodiment of this application. In some embodiments, the actuator 400 further includes a slide rail 420 and a sliding bracket 430. The slide rail 420 is connected to the first mounting bracket 100, and the sliding bracket 430 is slidably disposed on the slide rail 420. The end of the connecting rod 320 away from the crank 310 is movably connected to the sliding bracket 430, and the hook 410 is connected to the sliding bracket 430. Specifically, the extending direction of the slide rail 420 is consistent with the conveying direction of the conveyor belt 10.

[0034] This embodiment adds a slide rail 420 to the actuator 400, and assembles a slidable sliding bracket 430 on the slide rail 420. The end of the connecting rod 320 away from the crank 310 is movably connected to the sliding bracket 430, and the hook 410 is fixed to the sliding bracket 430. This makes the cigarette pack extraction device a stable crank 310 slider motion model. The rotational motion output by the drive mechanism 200 is accurately converted into the linear reciprocating motion of the sliding bracket 430 along the slide rail 420. This provides a rigid linear guide for the cigarette pack extraction action of the hook 410, avoiding motion trajectory deviation and tooth pitch deviation. It greatly improves the straightness and position control accuracy of the cigarette pack extraction action, significantly reduces the position deviation of the cigarette pack extraction, and effectively ensures the precise controllability of the cigarette pack extraction phase and stroke. It also avoids problems such as cigarette jamming, damage to the appearance of the cigarette pack and the quality of the cigarettes caused by action deviation.

[0035] Furthermore, the guide support structure formed by the slide rail 420 and the sliding bracket 430 can effectively disperse the instantaneous impact load under the condition of smoke jamming, further improve the impact resistance and operational stability of the mechanism, avoid the risk of failure of the transmission mechanism 300 due to impact, and significantly reduce the equipment failure rate.

[0036] In one exemplary embodiment, such as Figure 4 As shown, the hook 410 is made of 45 steel. The hook 410 is installed on the sliding bracket 430 by the first fastener 411. The split design ensures reliable extraction of the cigarette pack without damaging its quality. Specifically, the first fastener 411 is an M5×8 socket head cap screw.

[0037] In an optional embodiment, such as Figure 4 and Figure 5 As shown, the actuator 400 also includes a pulley 440, which is rotatably mounted on the sliding bracket 430 and movably connected to the slide rail 420.

[0038] This embodiment sets a pulley 440 on the sliding bracket 430, so that the pulley 440 and the slide rail 420 form a rolling action, thereby setting the reciprocating motion process of the actuator 400 as rolling friction, which greatly reduces the frictional resistance between the moving pairs and the wear of the parts, effectively extending the service life of the slide rail 420 and the sliding bracket 430. The pulley 440 can also ensure the long-term stability of the straightness and positioning accuracy of the cigarette pack extraction action, further reduce the deviation of the cigarette pack extraction position, and eliminate problems such as cigarette jamming and cigarette pack appearance damage caused by the decay of motion accuracy. It improves the action response speed and operation smoothness of the actuator 400, which can better adapt to the fast-paced reciprocating motion requirements of high-speed packaging production lines, reduce motion jitter and impact during high-speed start-up and shutdown, and further reduce the equipment failure rate.

[0039] In one exemplary embodiment, such as Figure 4 and Figure 5 As shown, there are four pulleys 440, with two pulleys 440 on each side of the slide rail 420 for clamping and sliding.

[0040] In one exemplary embodiment, such as Figure 4 and Figure 5 As shown, the sliding bracket 430 includes a pulley mounting bracket 432. The pulley mounting bracket 432 is connected to the side of the sliding bracket 430 facing the slide rail 420 by a third fastener 433. The pulley 440 is connected to the pulley mounting bracket 432 by a fourth fastener 441. Specifically, the third fastener 433 is an M5×20 socket head cap countersunk screw, and the fourth fastener 441 is an M5×12 socket head cap countersunk screw.

[0041] Furthermore, the crank 310 is made of 45 steel with a diameter of 30mm; the connecting rod 320 is made of aluminum alloy with a diameter of 10mm; and the sliding bracket 430 is made of ductile iron.

[0042] In one exemplary embodiment, considering the installation space of pulley 440, the travel of slide rail 420 is set to 280mm, with a rated dynamic load of 12.5kN, which meets the requirements of high-speed reciprocating motion and maintenance-free operation.

[0043] In an optional embodiment, such as Figure 4 As shown, the sliding bracket 430 is provided with a pin 431, and the end of the connecting rod 320 away from the crank 310 is movably connected to the pin 431. Specifically, the end of the connecting rod 320 away from the crank 310 is provided with a connecting hole, and the pin 431 is rotatably installed in the connecting hole.

[0044] In this embodiment, by setting a pin 431 in the sliding bracket 430, the end of the connecting rod 320 away from the crank 310 forms a precise movable hinge with the sliding bracket 430, thus constructing a stable and reliable rotary pair for the transmission mechanism 300. The rotational motion output by the crank 310 is converted into the linear reciprocating motion of the sliding bracket 430 along the slide rail 420 through the planar oscillation of the connecting rod 320. This ensures the rigid connection of the entire transmission path and the precise synchronization of power transmission, further improving the matching accuracy and stroke control accuracy of the cigarette pack extraction action, effectively reducing the deviation of the cigarette pack extraction position, reducing the failure rate of the mechanism, and ensuring the continuous operation capability of the cigarette packaging production line.

[0045] In an optional embodiment, such as Figure 2 and Figure 3 As shown, the transmission mechanism 300 also includes a first joint bearing 330 and a second joint bearing 340. The crank 310 and the connecting rod 320 are movably connected through the first joint bearing 330, and the connecting rod 320 and the sliding bracket 430 are movably connected through the second joint bearing 340.

[0046] This embodiment constructs a self-aligning hinged structure for the two core rotating pairs of the transmission mechanism 300 by setting a first joint bearing 330 at the hinge joint of the crank 310 and the connecting rod 320, and a second joint bearing 340 at the hinge joint of the connecting rod 320 and the sliding bracket 430, thereby optimizing the power transmission performance and operational reliability of the transmission mechanism 300. The spherical self-aligning characteristics of the first joint bearing 330 and the second joint bearing 340 can automatically compensate for the form and position tolerances of the parts during machining, the coaxiality deviation during assembly, and the slight deformation caused by the mechanism after long-term high-speed reciprocating operation. This avoids problems such as jamming, unilateral wear, and transmission jamming that are prone to occur with rigid hinges, and significantly reduces the difficulty of assembly and debugging of the mechanism and the skill requirements of the operators. The first joint bearing 330 and the second joint bearing 340 can also avoid the stress concentration problem caused by direct hinges, greatly improving the structural strength, impact resistance, and wear resistance of the core rotating pairs, and effectively extending the overall service life of the mechanism.

[0047] In an exemplary embodiment, the first joint bearing 330 is a left-handed joint bearing, and the second joint bearing 340 is a right-handed joint bearing. The first joint bearing 330 and the second joint bearing 340 significantly improve the phase matching accuracy, stroke control accuracy and positioning accuracy of the cigarette pack extraction action, greatly reduce the deviation of the cigarette pack extraction position, and ensure the quality pass rate of the finished product.

[0048] In an optional embodiment, such as Figure 2 As shown, the drive mechanism 200 includes a second mounting bracket 210 and a drive unit 220. The second mounting bracket 210 is connected to the first mounting bracket 100, and the drive unit 220 is mounted on the second mounting bracket 210. The drive unit 220 is driven connected to one end of the crank 310, the other end of the crank 310 is driven connected to one end of the connecting rod 320, and the other end of the connecting rod 320 is driven connected to the hook 410.

[0049] In this embodiment, a second mounting bracket 210 is set on the first mounting bracket 100, so that the second mounting bracket 210 serves as the load-bearing structure for the drive unit 220. The drive unit 220 is stably mounted on the second mounting bracket 210, and the output end of the drive unit 220 is directly connected to one end of the crank 310. This achieves the integrated assembly of the drive mechanism 200 and the transmission mechanism 300, which not only ensures the structural rigidity and output coaxiality of the drive unit 220, but also effectively suppresses vibration deviation during high-speed reciprocating operation and improves the smoothness of the drive mechanism 200's operation, but also enables the pre-assembly and independent disassembly of the drive mechanism 200, greatly reducing the assembly and debugging difficulty of the drive mechanism 200, shortening maintenance downtime, and reducing maintenance costs and operator skill requirements.

[0050] In one exemplary embodiment, such as Figure 2As shown, the second mounting bracket 210 is mounted to the first mounting bracket 100 via a second fastener 211. Specifically, the second fastener 211 is an internal hexagon socket head cap screw.

[0051] In one exemplary embodiment, the drive unit 220 is configured as a servo drive motor, which has the advantage of high control precision.

[0052] In an optional embodiment, such as Figure 2 and Figure 3 As shown, the drive mechanism 200 also includes a coupling 230, through which the drive unit 220 is connected to the crank 310.

[0053] In this embodiment, the drive unit 220 and the crank 310 are connected by a coupling 230, forming a reliable direct-drive connection structure between the drive end of the drive unit 220 and the transmission end of the transmission mechanism 300. This achieves precise coaxial docking and synchronous power transmission between the output shaft of the drive unit 220 and the crank 310, reducing the coaxiality requirements for the assembly of the drive unit 220 and the crank 310, and simplifying the assembly and debugging process of the drive mechanism 200. Simultaneously, the rigid transmission characteristics of the coupling 230 enable precise, slip-free, and lag-free power transmission from the drive mechanism 200, improving the motion control accuracy and synchronization of the transmission mechanism 300.

[0054] In an optional embodiment, the cigarette pack extraction device further includes a position detection module mounted on the slide rail 420, which is used to detect the position of the sliding bracket 430 on the slide rail 420.

[0055] Furthermore, the cigarette pack extraction device also includes a controller, which is electrically connected to the position detection module and the drive mechanism 200.

[0056] This embodiment achieves precise detection of the running position of the sliding support 430 on the slide rail 420 by setting a position detection module on the slide rail 420. The drive mechanism 200 and the position detection module are connected to the controller to build a closed-loop position control system for the entire cigarette pack extraction device. The position detection module can collect the stroke position, running speed and start / stop phase data of the sliding support 430 and feed them back to the controller, so that the controller forms a closed-loop linkage for the servo control of the drive unit 220. This can correct the position deviation of the actuator 400 during operation, further improve the position control accuracy and repeatability of the cigarette pack extraction action, effectively reduce the position deviation of the cigarette pack extraction, ensure that the extraction action of the hook 410 is precisely matched with the phase of the rotating station channel 20, eliminate malfunctions and quality problems caused by position deviation, significantly improve the qualified rate of finished cigarette packs, and improve the intelligent control level, operating accuracy and reliability of the cigarette pack extraction device.

[0057] In an exemplary embodiment, to verify the stable operation of the cigarette pack extraction device, the following formula for calculating the degrees of freedom of the transmission mechanism 300 is used: F=3n 2PL PH Where F represents the degrees of freedom of the transmission mechanism 300, i.e., the number of independent movements of the mechanism. n represents the number of moving components, referring to the number of components in the transmission mechanism 300 that can move relative to each other; in this embodiment, n=3. PL represents the number of lower pairs, referring to the kinematic pairs formed by two components through surface contact, such as revolute pairs and prismatic pairs. Each lower pair restricts 2 degrees of freedom; in this embodiment, PL=4. PH represents the number of higher pairs, referring to the kinematic pairs formed by two components through point or line contact, such as gear meshing and cam-driven contact. Each higher pair restricts 1 degree of freedom; in this embodiment, PH=0. Therefore, the degrees of freedom F of the transmission mechanism 300 in this embodiment are: F=3n 2PL PH = 3 × 3 2×4 0=9 8 0=1 Therefore, the degree of freedom F of the transmission mechanism 300 is 1, and the power source in this embodiment is also 1, so the transmission mechanism 300 has a definite motion.

[0058] In one exemplary embodiment, parameters are set to ensure stable operation of the cigarette pack extraction device. Specifically, the design calculations for the transmission mechanism 300 are as follows: (1) Key parameter settings: cigarette pack width B=97mm, of which the extraction stroke ≥B; production line speed v=280 packs / min, extraction time of a single cigarette pack t=0.5s; installation space limitation setting: connecting rod 320 length L≤200mm; load force F=50N based on cigarette pack friction and inertia.

[0059] (2) Calculate based on the above parameters: ① The hook 410 needs to allow a safety travel of 23mm. Calculate the travel S of the sliding bracket 430: S = B + 23mm = 97 + 23 = 120mm; ② Calculate the radius r of crank 310: Based on the formula for the stroke of the transmission mechanism 300, S=2×r, the radius of the crank 310 is calculated to be r=S2=60mm; ③ Calculate the length L of link 320: Taking the ratio of λ=Lr=5 for connecting rod 320, and according to the mechanical design recommendation of 3-10, taking into account both stability and compactness, the length of connecting rod 320 is calculated to be L=λ×r=5×60=300mm; ④ Calculate the transmission angle γ: When crank 310 is in the horizontal position, the transmission angle γ=arccos(r / l)=arccos(60 / 300)≈78.5°≥40°, which meets the non-locking requirement; ⑤ Calculate the pressure angle α: α=90° γ≈11.5°≤30°, meeting the requirements for high-efficiency transmission; ⑥ Calculate the torque of the drive mechanism 200: M=F×r×cosα=50N×0.060m×cos11.5°≈2.94N m, motor rated torque 1.27N m, with a safety factor of 1.8, meets the requirements; ⑦ Calculate the speed of the hook at 410 vs: vs = ω × r × sin(θ + φ), where θ is the crank angle of 310° and φ is the connecting rod angle of 320°. The maximum speed vsmax = ω × r × (1 + r / l) = (2πn / 60) × r × (1 + r / l) = (2π × 3000 / 60) × 0.060 × (1 + 60 / 300) ≈ 22.6 m / min, which matches the production line speed.

[0060] This embodiment uses mechanical design formulas to accurately calculate the key parameters of the cigarette pack extraction device, ensuring that the transmission angle, pressure angle, etc., meet the requirements for high-speed operation.

[0061] Furthermore, by setting the connecting rod 320 to an adjustable structure with a length adjustment range of ±20mm, the stroke of the hook 410 can be adjusted to adapt to different auxiliary tobacco packs with varying widths. This eliminates the need to replace or adjust components, offering the advantage of convenient adjustment.

[0062] On the other hand, this application also provides a method for extracting a cigarette pack, applicable to the cigarette pack extraction device described in any of the above embodiments, comprising the following steps: After receiving the signal that the cigarette pack has arrived, a command is sent to the drive mechanism 200; The drive mechanism 200 drives the hook 410 to reciprocate linear motion through the crank 310 and the connecting rod 320, so that the hook 410 completes the action of pulling out the cigarette pack. After the cigarette pack is removed, a reset signal is sent to the hook 410, and the system waits for the next cigarette pack to be positioned.

[0063] The cigarette pack extraction method described in this embodiment uses a first mounting bracket 100 mounted on the frame of the conveyor belt. The drive mechanism 200 drives the hook 410 to reciprocate via a crank 310 and a connecting rod 320, thereby transferring the cigarette packs in the rotary station channel 20 onto the conveyor belt. This transmission mechanism 300, composed of the crank 310 and connecting rod 320, eliminates the problems of elastic deformation and tooth wear caused by long-term operation of traditional synchronous belts, significantly improving the position control accuracy of the cigarette pack extraction device and effectively ensuring the appearance of the cigarette packs and the quality of the finished cigarettes. Furthermore, this embodiment directly drives the crank 310 via the drive mechanism 200, simplifying intermediate transmission links, reducing transmission energy loss, and the rigid transmission structure can withstand the instantaneous impact force under cigarette jamming conditions, greatly improving the operational stability and service life of the mechanism.

[0064] The cigarette pack extraction method described in this application embodiment can further optimize the parameters of the crank 310 and connecting rod 320 to make the overall structure compact, adapting to the narrow installation space of the fully open hard box packaging machine. At the same time, it eliminates the need for high-wear synchronous belt components, eliminating the need for frequent machine shutdowns to replace vulnerable parts and remove accessories, significantly shortening equipment maintenance time, reducing maintenance costs and operator skill requirements, effectively ensuring the continuous operation capability and equipment operating efficiency of the cigarette packaging production line, and fully meeting the intelligent and automated production needs of cigarette enterprises for high speed, stability, and low maintenance.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cigarette pack extraction device, characterized in that, include: The first mounting bracket (100) is used to mount the frame of the cigarette pack extraction conveyor belt (10); A drive mechanism (200) is mounted on the first mounting bracket (100). A crank (310) and a connecting rod (320), wherein the drive mechanism (200) is drivenly connected to the crank (310) and the connecting rod (320) is drivenly connected to the crank (310); An actuator (400) includes a hook (410) which is driven to the connecting rod (320) so that the drive mechanism (200) drives the hook (410) to reciprocate via the crank (310) and the connecting rod (320).

2. The cigarette pack extraction device according to claim 1, characterized in that: The actuator (400) further includes a slide rail (420) and a sliding bracket (430). The slide rail (420) is connected to the first mounting bracket (100). The sliding bracket (430) is slidably disposed on the slide rail (420). The end of the connecting rod (320) away from the crank (310) is movably connected to the sliding bracket (430). The hook (410) is connected to the sliding bracket (430).

3. The cigarette pack extraction device according to claim 2, characterized in that: The actuator (400) further includes a pulley (440), which is rotatably mounted on the sliding bracket (430) and movably connected to the slide rail (420).

4. The cigarette pack extraction device according to claim 2, characterized in that: The sliding bracket (430) is provided with a pin (431), and the end of the connecting rod (320) away from the crank (310) is movably connected to the pin (431).

5. The cigarette pack extraction device according to claim 2, characterized in that: The cigarette pack extraction device further includes a first joint bearing (330) and a second joint bearing (340). The crank (310) and the connecting rod (320) are movably connected through the first joint bearing (330), and the connecting rod (320) and the sliding bracket (430) are movably connected through the second joint bearing (340).

6. The cigarette pack extraction device according to any one of claims 2-5, characterized in that: The drive mechanism (200) includes a second mounting bracket (210) and a drive unit (220). The second mounting bracket (210) is connected to the first mounting bracket (100). The drive unit (220) is mounted on the second mounting bracket (210). The drive unit (220) is driven connected to one end of the crank (310). The other end of the crank (310) is driven connected to one end of the connecting rod (320). The other end of the connecting rod (320) is driven connected to the hook (410).

7. The cigarette pack extraction device according to claim 6, characterized in that: The drive mechanism (200) also includes a coupling (230), through which the drive unit (220) is connected to the crank (310).

8. The cigarette pack extraction device according to claim 6, characterized in that: The cigarette pack extraction device also includes a position detection module, which is installed on the slide rail (420) and is used to detect the position of the sliding bracket (430) on the slide rail (420).

9. The cigarette pack extraction device according to claim 8, characterized in that: The cigarette pack extraction device also includes a controller, which is electrically connected to the position detection module and the drive mechanism (200).

10. A method for extracting a cigarette pack, applicable to the cigarette pack extraction device according to any one of claims 1-9, characterized in that, Includes the following steps: After receiving the signal that the cigarette pack is in place, a command is sent to the drive mechanism (200). The drive mechanism (200) drives the hook (410) to reciprocate linear motion through the crank (310) and connecting rod (320), so that the hook (410) completes the action of pulling out the cigarette pack; After the cigarette pack is pulled out, a reset signal is sent to the hook (410) to wait for the signal for the next cigarette pack to be in place.

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