Four-station bag feeding vacuum packaging machine

Abstract

The utility model discloses a four station gives bag formula vacuum packaging machine relates to packaging mechanical equipment technical field. The utility model fills the blanking system part and adopts four division first rotating disc and four sets of clamping assembly, and the corresponding four stations are respectively bagging station, opening bag blanking station, third station and transfer station, and the vacuum system part adopts four division second rotating disc and four sets of vacuum chamber, and the cover of vacuum chamber, bag clamping and sealing assembly are all integrated in vacuum chamber and form vacuum chamber module to simplify the structure of second rotating disc. The utility model integrates opening bag and blanking in a station, and the relevant parts of bag supporting assembly are omitted, and the equipment cost is reduced, and the vacuum chamber is modularized, and the vacuum system structure is optimized, and from station integration and part modularization, make bag formula vacuum packaging machine can be more miniaturized, and the floor area is smaller, and the frame cost is saved, satisfy the small and medium enterprise to bag packaging machine miniaturization, low cost requirement.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, and more specifically to a four-station vacuum bag feeding packaging machine. Background Technology

[0002] Currently, a common type of pre-filled bag vacuum packaging machine (such as CN222698885U, a multi-station high-speed pre-filled bag vacuum packaging machine) mainly consists of a machine base and a filling and feeding system and a vacuum system set on the machine base. The so-called filling and feeding system is the same as that of the pre-filled bag packaging machine (such as CN215044158U, CN221938508U, etc.). By adding a vacuum system to one side of the conventional pre-filled bag packaging machine, a pre-filled bag vacuum packaging machine is formed.

[0003] The filling and feeding system of commonly available bag-type vacuum packaging machines consists of a base, a rotating sleeve, and a rotating disk. The rotating sleeve is rotatably mounted on the base, and the rotating disk is fixed to the upper end of the rotating sleeve. The drive component inside the base can drive the rotating sleeve to rotate. The rotating disk is equipped with multiple sets of clamping components for holding pre-made packaging bags (usually 8, 10, or 12 sets). Around the base, a bag loading mechanism, a bag opening mechanism, a feeding mechanism, and a transfer mechanism are arranged in sequence. A bag-supporting shaft is coaxially mounted inside the rotating sleeve, and a bag-supporting component is fixedly mounted on the upper end of the bag-supporting shaft. After the bag opening component opens the bag opening of the pre-made packaging bag held by the clamping component, the bag-supporting shaft moves down, causing the bag-supporting component to insert into the opening of the pre-made packaging bag. Then, the bag-supporting component actuates to open the pre-made packaging bag and rotates with the clamping component to below the feeding component. When the feeding hopper of the feeding component inserts into the opened pre-made packaging bag, the bag-supporting component withdraws from the pre-made packaging bag and resets. The vacuum system includes a vacuum turntable, several vacuum chambers arranged around the vacuum turntable, a vacuuming mechanism, and a sealing mechanism located in the vacuum chambers. A transfer structure connects the turntable and the vacuum turntable and is used to transfer the pre-made packaging bag with completed material filling to the vacuum chamber on the vacuum turntable.

[0004] The working principle of existing pre-made bag vacuum packaging machines is as follows: Pre-made packaging bags are stored in the bag bin corresponding to the bag loading mechanism. The bag picking mechanism takes out the pre-made packaging bags one by one from the bag bin. The bag loading mechanism transfers the pre-made packaging bags taken out by the bag picking mechanism to the clamping assembly on the rotating disk. The clamping assembly transfers the pre-made packaging bags to the bag opening mechanism (bag opening station) as the rotating disk rotates. The bag opening mechanism uses its bag opening suction cups to suction the bag body from both sides of the pre-made packaging bag to open the bag opening. Then, the bag opening support mechanism is inserted into the pre-made packaging bag with the opened bag opening and expands the pre-made packaging bag. The bag opening support mechanism rotates at the same speed as the rotating disk and transfers the pre-made packaging bag to the unloading mechanism (unloading station). At the material feeding station, the lower end of the feeding hopper of the feeding mechanism is inserted into the opened packaging bag, ready for feeding. At this time, the bag supporting component is pulled out of the pre-made packaging bag, and then reset and moved above the bag opening mechanism. After feeding is completed, the rotating plate continues to drive the pre-made packaging bag to the transfer mechanism. The rotating mechanism picks up the pre-made packaging bag filled with material and transfers it from the rotating plate to the vacuum chamber on the vacuum plate. The vacuum chamber closes as the vacuum plate rotates, and then a vacuum is drawn. After reaching the set vacuum degree, the sealing mechanism in the vacuum chamber seals the pre-made packaging bag. After sealing is completed, the vacuum chamber opens, and the vacuum-sealed pre-made packaging bag is discharged from the discharge component, completing the material filling and vacuum sealing of the pre-made packaging bag.

[0005] Currently available pre-filled bag vacuum packaging machines all utilize the aforementioned structural principles, resulting in large equipment size and high manufacturing costs. For micro and small processing enterprises, purchasing an 8-station (filling and feeding system) to 10-station (vacuum system) pre-filled bag vacuum packaging machine, or a 10-station to 12-station pre-filled bag vacuum packaging machine, is prohibitively expensive and prone to overcapacity, failing to leverage its advantages. This poses a burden for micro and small processing enterprises. While some semi-automatic vacuum packaging equipment on the market offers lower costs, its efficiency cannot meet the needs of processing enterprises, and it still requires significant labor costs. Therefore, continued structural optimization of existing pre-filled bag vacuum packaging machines is necessary to achieve miniaturization and lower costs, thus meeting the packaging needs of micro and small enterprises. Utility Model Content

[0006] To overcome the defects and shortcomings of the existing technology, this utility model provides a four-station bag-feeding vacuum packaging machine. The purpose of this invention is to optimize the structure of existing bag-feeding vacuum packaging machines, making them more compact and reducing their manufacturing costs, so as to meet the needs of micro and small enterprises for small-scale and low-cost equipment. Compared with existing bag-feeding vacuum packaging machines, the filling and feeding system of this utility model adopts a four-section first rotating disk and four sets of clamping components, corresponding to four stations: bag loading station, bag opening and feeding station, third station, and transfer station. The vacuum system adopts a four-section second rotating disk and four sets of vacuum chambers. The opening, bag clamping, and sealing components of the vacuum chambers are all integrated into the vacuum chamber to form a vacuum chamber module, thereby simplifying the structure of the second rotating disk. This utility model integrates bag opening and material feeding into one station, omitting related parts of the bag support assembly, reducing equipment costs, and modularizing the vacuum chamber to optimize the vacuum system structure. From the aspects of station integration and component modularization, the bag-feeding vacuum packaging machine can be made smaller, occupying less space, saving frame costs, and meeting the requirements of micro and small enterprises for miniaturized and low-cost bag-feeding packaging machines.

[0007] To address the problems existing in the prior art, the present invention is achieved through the following technical solution.

[0008] This utility model provides a four-station bag-feeding vacuum packaging machine, including a machine base, a filling and feeding system, a vacuum system and a transfer mechanism. The filling and feeding system and the vacuum system are both set on the machine base. The transfer mechanism is set between the filling and feeding system and the vacuum system to transfer the pre-made packaging bags that have been filled with materials in the filling and feeding system to the vacuum chamber of the vacuum system.

[0009] The filling and feeding system includes a base, a first rotating sleeve, a first rotating disk, a bag hopper, a bag picking mechanism, a bag loading mechanism, a bag opening mechanism, a lifting hopper, a first clamping mechanism, and a second clamping mechanism. The base is mounted on a machine base, the first rotating sleeve is rotatably mounted on the base, and the first rotating disk is fixed to the upper end of the rotating sleeve. A turntable drive assembly for driving the rotating disk is provided inside the base. The vacuum system includes a second rotating sleeve, a second rotating disk, and a vacuum chamber surrounding the second rotating disk.

[0010] On the first rotating disk, four sets of clamping components for clamping pre-made packaging bags are arranged radially along the circumference with the center of the first rotating disk as the center. The first rotating disk is set with four work positions according to the four divisions, and each set of clamping components corresponds to one work position. The work positions are switched cyclically as the first rotating disk rotates.

[0011] The bag compartment, bag taking mechanism and bag loading mechanism are mounted on the frame of the machine base on the outside of the first station. The first clamping mechanism is mounted on the base on the inside of the first station. The first clamping mechanism acts on the clamping component that rotates to the first station to open its bag clamping claws.

[0012] The lifting hopper and the bag opening mechanism are mounted on the frame of the machine base outside the second station. The bag opening mechanism is configured to open the bag opening of the pre-made packaging bag held on the clamping assembly that has been rotated to the second station by using the relative moving away action of the first suction cup and the second suction cup. The lifting hopper moves down so that its lower end is inserted into the pre-made packaging bag with the bag opening opened. The transfer mechanism is located outside the fourth station.

[0013] On the second rotating disk, four vacuum chambers are arranged radially along the circumference with the center of the second rotating disk as the center. The vacuum chambers correspond to the fourth station of the filling and feeding system, and the vacuum chambers are cyclically switched as the second rotating disk rotates.

[0014] More preferably, the transfer mechanism includes a translation drive assembly, a transfer connecting arm, a fixed bag clamping plate, a movable bag clamping plate, and a bag clamping drive cylinder that drives the movable bag clamping plate to swing relative to the fixed bag clamping plate; the bottom of the transfer connecting arm is mounted on the translation drive assembly, which drives the transfer connecting arm to reciprocate between the clamping assembly of the fourth station of the filling and feeding system and the vacuum chamber of the vacuum system; a bag clamping rotating shaft is fixed to the upper end of the transfer connecting arm, and a bag clamping rotating shaft is rotatably mounted inside the bag clamping rotating shaft; the fixed bag clamping plate is fixed to the bag clamping rotating shaft and extends to the free end of the bag clamping rotating shaft; the movable bag clamping plate is fixed to the free end of the bag clamping rotating shaft; a bag clamping swing arm is fixedly connected to the drive end of the bag clamping rotating shaft; the end of the bag clamping drive cylinder is hinged to the transfer connecting arm, and the telescopic end of the bag clamping drive cylinder is hinged to the bag clamping swing arm.

[0015] More preferably, the vacuum chamber includes a box body and a cover body. The cover body is hinged to the box body via a cover body connecting arm. An opening cylinder is provided on the back of the box body. The cylinder end of the opening cylinder is hinged to the box body via a cylinder mounting seat, and the extended end of the opening cylinder is hinged to the cover body connecting arm via a spherical bearing.

[0016] More preferably, a sealing cylinder is fixed to the bottom of the box body, and the telescopic end of the sealing cylinder extends into the box body and connects with the sealing block; a sealing base that cooperates with the sealing block is provided on the cover; a fixing plate is provided below the sealing block, and the fixing plate is fixedly assembled into the box body. A first fixing bag clamping block is provided at one end of the fixing plate, and a sliding plate is slidably provided at the other end of the fixing plate. The sliding plate is connected to the telescopic end of the sealing cylinder extending into the box body through a connecting plate. One end of the connecting plate is hinged to the telescopic end of the sealing cylinder, and the other end is hinged to the sliding plate; a... The second fixed bag clamping block has two rotatable bag clamping shafts on the box body. The upper end of the first bag clamping shaft is fixedly connected to the first movable bag clamping block through the first bag clamping arm. The lower end of the first bag clamping shaft extends out of the box body and is hinged to one end of the cylinder through the first swing arm. The upper end of the second bag clamping shaft is fixedly connected to the second bag clamping arm. The sliding plate is axially connected to the end of the second bag clamping arm and the third bag clamping arm is bolted together. The end of the third bag clamping arm is provided with the second movable bag clamping block. The lower end of the second bag clamping shaft extends out of the box body and is hinged to the cylinder through the second swing arm.

[0017] More preferably, the lifting hopper is connected to the lifting drive assembly via a first connecting arm, and the lifting drive assembly drives the lifting hopper to rise and fall.

[0018] More preferably, the lifting drive assembly includes a lifting mounting base, a lifting drive component, a mounting connecting frame, and a guide shaft; the lifting mounting base is fixedly mounted on the frame, the lifting drive component is mounted on the lifting mounting base, the telescopic end of the lifting drive component is connected to the mounting connecting frame, the upper end of the guide shaft is fixedly connected to the mounting connecting frame, the lower end of the guide shaft is slidably engaged with a guide shaft sleeve fixedly mounted on the lifting mounting base, and the first connecting arm is mounted on the mounting connecting frame.

[0019] More preferably, the filling and feeding system further includes a second lifting feeding hopper, which is positioned above the pre-made packaging bag held by the clamping assembly that has rotated to the third position.

[0020] More preferably, the lifting hopper and the second lifting unloading hopper are both driven by the same lifting drive assembly; the lifting hopper is connected to the lifting drive assembly via a first connecting arm, and the second lifting unloading hopper is connected to the lifting drive assembly via a second connecting arm.

[0021] In a further preferred embodiment, the four-station bag packaging machine also includes an electrical box, which is located on the outside of the frame corresponding to the first station; the electrical box is concave, and the bag compartment and the bag picking mechanism are respectively arranged in the groove formed by the electrical box; the bag picking mechanism is located below the bag compartment; a touch screen is provided on the top of the electrical box on one side of the bag compartment.

[0022] More preferably, the bag opening mechanism includes a bag opening mounting base, a bag opening servo motor assembly, a first bag opening arm, a second bag opening arm, a first suction cup, and a second suction cup. The bag opening mounting base is mounted on the frame, the bag opening servo motor assembly is fixedly mounted on the bag opening mounting base, the upper end of the first bag opening arm is mounted on the output shaft of the bag opening servo motor assembly, the upper end of the second bag opening arm is rotatably mounted on the bag opening mounting base, a first bag opening swing arm extending towards the second bag opening arm is provided on the connection end connecting the first bag opening arm and the bag opening servo motor assembly, and a second bag opening swing arm extending towards the first bag opening arm is provided on the connection end rotatably connected to the bag opening mounting base. The first bag opening swing arm and the second bag opening swing arm are connected by a transmission link, one end of which is hinged to the first bag opening swing arm, and the other end of which is hinged to the second bag opening swing arm. The first suction cup is fixedly mounted on the lower end of the first bag opening arm, and the second suction cup is fixedly mounted on the lower end of the second bag opening arm.

[0023] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0024] 1. This utility model features an integrated design that reduces equipment size and cost, making it suitable for the needs of micro and small enterprises. Through station integration and component optimization, this utility model specifically addresses the pain points of traditional bag-type vacuum packaging machines, which are characterized by large size and high cost. In the filling and feeding system, the traditionally separate bag opening and feeding stations are integrated into a single station (the second station), eliminating the need for bag-supporting components and related transmission parts. This allows the first rotating disc to have only four sets of clamping components arranged in a four-quarter pattern, corresponding to four stations (bag loading, bag opening and feeding, the third station, and the transfer station). Compared to traditional equipment with 8-12 sets of clamping components, the number of parts is reduced by more than 50%, and the volume of the filling and feeding system is reduced by 40%-50%. In the vacuuming system, the second rotating disc also adopts a four-quarter pattern design, requiring only four vacuum chambers. This eliminates the need for complex external transmission mechanisms, simplifying the vacuuming system structure and reducing its size by 30%-40% compared to traditional equipment. With dual optimization, the machine's footprint is reduced by more than 60% compared to the traditional 8-station (filling and unloading) and 10-station (vacuuming) equipment, and the manufacturing cost (including frame, core components, and assembly cost) is reduced by 35%-45%. It perfectly meets the production needs of micro and small enterprises with "limited space and insufficient budget" while avoiding the waste of resources caused by "overcapacity" of traditional equipment.

[0025] 2. The compact layout of this filling and feeding system improves operational efficiency and ensures continuous production stability. In the system, the first rotating disc is arranged with four sets of clamping components in a four-quarter pattern. Each set of components cycles synchronously with the rotating disc, switching between workstations. Furthermore, the actuators at each workstation (bag loading, bag opening and feeding, and transfer) are compactly arranged around the rotating disc, shortening the flow path of pre-packaged bags between processes and reducing redundant rotation time between multiple workstations in traditional equipment. Specifically, the bag opening mechanism directly opens the bag opening through the relative movement of the first and second suction cups, coordinating with the downward movement of the lifting hopper to complete the feeding, eliminating the complex "insertion-opening-withdrawal-reset" process of the bag-supporting components in traditional equipment. The first and second clamping mechanisms precisely act on the clamping components at the first and fourth workstations, respectively, ensuring precise synchronization between the opening and closing of the bag clamps and the workstation flow, reducing the risk of bag jamming and missed clamping. Overall, the filling and feeding system maintains efficient and continuous operation while simplifying its structure, laying the foundation for a stable connection to the subsequent vacuuming process.

[0026] 3. The modular design of this vacuum system simplifies operation and maintenance, reducing operating costs. The vacuum chamber of the vacuum system adopts an integrated modular structure of "box body + cover body," integrating components such as the opening cylinder, sealing cylinder, bag clamping shaft, and bag clamping block into an independent functional unit. On the one hand, the modular design makes the installation and debugging of the vacuum chamber more convenient, shortening the installation cycle compared to the traditional decentralized structure. Furthermore, each vacuum chamber can be independently disassembled and replaced. If a vacuum chamber malfunctions, there is no need to stop the entire machine for repair; only the faulty module needs to be replaced to resume production, reducing equipment downtime and maintenance costs. On the other hand, the vacuum chambers are compatible with the four-section layout of the second rotating disk. The four vacuum chambers synchronously cycle and switch with the second rotating disk, precisely corresponding to the transfer station of the fourth station of the filling and feeding system. The transfer mechanism can efficiently complete the handover of packaging bags, improving the continuity of the vacuuming process. In addition, the sealing components (sealing cylinder, sealing block, sealing base) integrated in the vacuum chamber work together with the bag clamping components (bag clamping shaft, bag clamping block, sliding plate) to complete the entire process of "bag clamping - vacuuming - bag opening straightening - sealing" within the vacuum chamber, reducing the impact of the external environment on the vacuum level and improving the sealing qualification rate.

[0027] 4. This utility model features a precise linkage in its transfer mechanism. The translational transfer mechanism optimizes handover accuracy and efficiency, and is suitable for compact overall machine layouts. The transfer mechanism of this utility model adopts a "translation drive + bag clamping linkage" design. Compared to traditional equipment that relies on reciprocating swing for transfer, it significantly improves the stability and efficiency of the handover between the pre-packaged bags and the vacuum system. From an operational logic perspective, the translation drive component drives the transfer connecting arm to move reciprocally along a straight line between the fourth-station clamping component and the vacuum chamber, avoiding the positioning errors caused by the "arc-shaped motion trajectory" of traditional swing-type transfer mechanisms. Combined with the cooperation of the bag clamping rotating shaft and the bag clamping rotating shaft sleeve, the movable bag clamping plate can flexibly adapt to different sizes of packaging bags. After clamping, it can accurately align with the vacuum chamber entrance, improving the handover positioning accuracy to ±0.5mm, reducing the risk of misalignment compared to traditional swing-type structures. The translational movement is more easily synchronized with the rotation rhythm of the first and second rotating disks. When the fourth-station clamping component completes the work... When the material is being filled and the second clamping mechanism opens the bag gripper, the transfer mechanism can immediately move to the gripping position and simultaneously complete the opening action of the vacuum chamber, achieving a seamless connection between "gripping-transferring-placing" and avoiding the waiting gap caused by the trajectory limitation of traditional swing transfer. From a spatial adaptation perspective, the translational structure is laid out in a straight line and can be installed close to the outside of the two systems without reserving extra space for the swing trajectory, further supporting the "compact and miniaturized" design of the whole machine. It saves layout space compared with traditional swing transfer mechanisms, while reducing the risk of interference with other components during the transfer process and improving the stability of equipment operation.

[0028] 5. This utility model features a third workstation with reserved expansion space, enhancing the equipment's multi-functional adaptability. The reserved third workstation in the filling and feeding system provides diversified functional expansion possibilities for the equipment, breaking the limitations of traditional bag-type vacuum packaging machines that are "fixed in function and adaptable to a single scenario." If dual-material or multi-component material packaging is required, a second lifting hopper can be added above the corresponding clamping component of the third workstation. This hopper can be driven synchronously with the lifting hopper of the second workstation via the same lifting drive component, achieving sequential filling of "first material (second workstation) - second material (third workstation)." This adapts to packaging scenarios such as mixed nuts and dried fruits, and dual-component powder and granules, eliminating the need for additional multi-material vacuum packaging equipment. If a material pre-processing step is required, a weighing detection component (such as a small weighing sensor) can be installed at the third workstation to re-check the weight of the packaged bags after feeding, or a bag opening shaping mechanism can be installed to ensure the stability of subsequent transfer and vacuuming processes. Furthermore, a coding component can be installed at the third workstation as needed to pre-label information such as production date and batch number. All expansion configurations do not require changes to the main structure of the equipment. Only corresponding components need to be added to the reserved workstations, and the footprint of the whole machine will not be increased. This allows one machine to adapt to the vacuum packaging needs of multiple industries such as food, daily chemicals, and pharmaceuticals, greatly improving the cost performance and market competitiveness of the equipment, and meeting the lightweight production needs of micro and small enterprises that "one machine can handle multiple types of products".

[0029] 6. The "U"-shaped electrical box optimizes the layout, balancing space utilization and ease of operation. The electrical box is placed on the outside of the frame corresponding to the first workstation, and adopts a "U"-shaped structure design. The bag compartment and bag picking mechanism are embedded in the groove of the electrical box, and the bag picking mechanism is located below the bag compartment, forming an integrated layout of "electrical control-bag supply". From a space utilization perspective, this design avoids the need for separate layouts of the electrical box, bag compartment, and bag-picking mechanism, thus saving additional space and further supporting the goal of miniaturization of the entire machine. Compared to the independent setup of components in traditional equipment, it saves external layout space. From an operational convenience perspective, the touch screen on the top of the electrical box is adjacent to the bag compartment and bag-picking mechanism, allowing operators to complete equipment parameter settings (such as packaging speed, material feed rate, and vacuum level), bag replenishment, and bag picking status observation in the same area, eliminating the need to travel between different areas of the equipment. This reduces the operational workflow by more than 50%, improving work efficiency. At the same time, the concave structure provides natural protection for the bag compartment and bag-picking mechanism, reducing the impact of external dust and airflow on the stability of bag supply. The design of the bag-picking mechanism located below the bag compartment conforms to the natural falling logic of pre-packaged bags, reducing the risk of bag jamming and further ensuring the continuous and stable operation of the filling and feeding system.

[0030] 7. The lifting drive assembly synchronously controls the two hoppers, achieving efficient multi-material packaging. The first and second lifting hoppers share the same lifting drive assembly, connected to the mounting frame via the first and second connecting arms. The lifting drive assembly synchronously drives the two hoppers to rise and fall. This design achieves dual-material filling while avoiding the complex structure of traditional multi-material equipment that requires an independent drive assembly for each hopper. On one hand, synchronous lifting control ensures that the filling rhythm of the first material (second station) and the second material (third station) precisely matches the station switching speed of the first rotary table. On the other hand, sharing a single lifting drive assembly (including the lifting mounting base, drive assembly, and guide shaft) reduces the number of drive components compared to the traditional dual-drive structure, lowering equipment manufacturing costs and failure rates. It also simplifies the control program; operators only need to set the lifting parameters once via the touchscreen display to synchronously control the two hoppers, reducing operational complexity. Furthermore, the sliding fit design of the guide shaft and guide sleeve ensures stability and no deviation during the lifting of the two hoppers, keeping the filling accuracy error within the set range and guaranteeing the metering accuracy of multi-material packaging.

[0031] 8. The linked design of the bag opening mechanism enhances the stability of bag opening and adapts to various packaging bag sizes. The bag opening mechanism drives the first bag opening arm to rotate through the bag opening servo motor assembly, and then drives the second bag opening arm to swing synchronously in the opposite direction through the first swing arm, transmission linkage, and second swing arm. This achieves the relative distance or proximity of the first and second suction cups. Compared with the traditional structure of independently driving two bag opening arms, this linked design significantly improves the synchronization and stability of the bag opening action. In terms of bag opening performance, the servo motor precisely controls the rotation angle of the swing arm, achieving a spacing adjustment accuracy of ±0.1mm between the two suction cups. This allows it to adapt to pre-made packaging bags with widths ranging from 50mm to 150mm, and ensures a uniform bag opening angle. This avoids problems such as bag opening misalignment and inability to open due to asynchronous arm movements in traditional equipment, increasing the bag opening success rate to over 99.5%. In terms of structural simplification, only one set of servo motor components is needed to drive both bag opening arms, reducing the number of drive components by 40% compared to the traditional dual-drive structure. This lowers equipment costs and energy consumption, while also shortening the installation space of the bag opening mechanism, allowing for a more compact overall layout. In terms of operational adaptability, the bag opening angle and speed can be adjusted in real time via a touch screen. Operators can flexibly adjust parameters according to the packaging bag material (such as film or composite film) and thickness, further improving bag opening stability and broadening the equipment's adaptability to different packaging materials. Attached Figure Description

[0032] Figure 1 This utility model relates to a three-dimensional four-station bag-feeding vacuum packaging machine. Figure 1 ;

[0033] Figure 2 This utility model relates to a three-dimensional four-station bag-feeding vacuum packaging machine. Figure 2 ;

[0034] Figure 3 This is a front view of the four-station bag-feeding vacuum packaging machine of this utility model;

[0035] Figure 4 This is a rear view of the four-station bag-feeding vacuum packaging machine of this utility model;

[0036] Figure 5 This is a top view of the four-station bag-feeding vacuum packaging machine of this utility model;

[0037] Figure 6 This is a schematic diagram of the transfer mechanism of the four-station bag-feeding vacuum packaging machine of this utility model;

[0038] Figure 7 This is a schematic diagram of the vacuum chamber structure of the four-station bag-feeding vacuum packaging machine of this utility model;

[0039] Figure 8 This is a schematic diagram of the vacuum chamber structure in the four-station bag-feeding vacuum packaging machine of this utility model;

[0040] Figure 9 This utility model provides a three-dimensional bag opening and unloading assembly system for a four-station bag-feeding vacuum packaging machine. Figure 1 ;

[0041] Figure 10 This utility model provides a three-dimensional bag opening and unloading assembly system for a four-station bag-feeding vacuum packaging machine. Figure 2 ;

[0042] Figure 11 This is a schematic diagram of the assembly structure of the bag opening mechanism of the four-station bag-feeding vacuum packaging machine of this utility model.

[0043] Figure 12 This is a perspective view of the opening and clamping assembly of the four-station bag-feeding vacuum packaging machine of this utility model.

[0044] Figure 13 This is a side view of the assembly of the opening and clamping components of the four-station bag-feeding vacuum packaging machine of this utility model;

[0045] Figure 14 This is a schematic diagram of the first clamping mechanism of the four-station bag-feeding vacuum packaging machine of this utility model;

[0046] Figure 15 This is a schematic diagram of the second clamping mechanism of the four-station bag-feeding vacuum packaging machine of this utility model;

[0047] Figure 16 This is a three-dimensional view of the bag compartment, bag retrieval, and bag loading assembly of the four-station bag-feeding vacuum packaging machine of this utility model.

[0048] Figure 17 This is a side view of the bag compartment-bag taking-up-bag loading assembly of the four-station bag feeding vacuum packaging machine of this utility model;

[0049] Reference numerals: 1. Base, 2. Frame, 3. Filling and feeding system, 4. Vacuum system, 5. Transfer mechanism, 6. Base, 7. First rotating sleeve, 8. First rotating disk, 9. Bag bin, 10. Bag picking mechanism, 11. Bag loading mechanism, 12. Bag opening mechanism, 13. Lifting hopper, 14. First clamping mechanism, 15. Second clamping mechanism, 16. Second rotating sleeve, 17. Second rotating disk, 18. Vacuum chamber, 19. Clamping assembly, 20. First station, 21. Second station, 22. Third station, 23. Fourth station, 24. Flat 25. Transfer drive assembly, 26. Fixed bag clamping plate, 27. Movable bag clamping plate, 28. Bag clamping drive cylinder, 29. Bag clamping rotating shaft sleeve, 30. Bag clamping rotating shaft, 31. Bag clamping swing arm, 32. Box body, 33. Lid body, 34. Lid opening cylinder, 35. Lid body connecting arm, 36. Sealing cylinder, 37. Sealing block, 38. Fixed plate, 39. First fixed bag clamping block, 40. Sliding plate, 41. Connecting plate, 42. Second fixed bag clamping block, 43. First bag clamping shaft, 44. First bag clamping arm, 45. First movable bag clamping block, 4 6. First swing arm; 47. Second bag clamping shaft; 48. Second bag clamping arm; 49. Second movable bag clamping block; 50. Second swing arm; 51. First connecting arm; 52. Lifting drive assembly; 53. Lifting mounting base; 54. Lifting drive component; 55. Mounting connecting frame; 56. Guide shaft; 57. Guide shaft sleeve; 58. Second lifting unloading hopper; 59. Second connecting arm; 60. Electrical box; 61. Groove; 62. Bag opening mounting base; 63. Bag opening servo motor assembly; 64. First bag opening arm; 65. Second bag opening arm; 66. First suction cup; 6 7. Second suction cup; 68. First bag opening swing arm; 69. Second bag opening swing arm; 70. Transmission link; 71. First mounting bracket; 72. First transmission arm; 73. Clamping link; 74. Clamping swing arm; 75. Clamping servo motor assembly; 76. Clamping push plate; 77. First connecting part; 78. Second connecting part; 79. Shaft connection part; 80. Second mounting bracket; 81. Second transmission arm; 82. Second clamping drive component; 83. Clamping arm; 84. Bag clamping claw; 85. Clamping assembly adjusting swing arm; 86. Moving disk; 87. Third bag clamping arm. Detailed Implementation

[0050] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] As a preferred embodiment of this invention, this embodiment provides a four-station bag-feeding vacuum packaging machine, as shown in the attached instruction manual. Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 5 As shown, it includes a base 1, a filling and feeding system 3, a vacuum system 4, and a transfer mechanism 5. The filling and feeding system 3 and the vacuum system 4 are both mounted on the base 1. The transfer mechanism 5 is located between the filling and feeding system 3 and the vacuum system 4, and transfers the pre-made packaging bags that have been filled with materials in the filling and feeding system 3 to the vacuum chamber 18 of the vacuum system 4.

[0052] The four-station bag-feeding vacuum packaging machine provided in this embodiment uses servo motors and reducers to drive all components in the filling and feeding system (such as the turntable drive assembly, the bag feeding mechanism drive assembly, the bag opening mechanism drive assembly, the moving plate drive assembly, etc.). The drive assembly in the vacuuming system also uses servo motors and reducers to drive (such as the second turntable drive assembly). Compared with the conventional cam transmission structure, the four-station bag-feeding vacuum packaging machine in this embodiment does not have complicated cam transmission components, and the base structure is simple, with the base only serving a supporting function.

[0053] The filling and feeding system 3 includes a base 6, a first rotating sleeve 7, a first rotating disk 8, a bag hopper 9, a bag picking mechanism 10, a bag loading mechanism 11, a bag opening mechanism 12, a lifting hopper 13, a first clamping mechanism 14, and a second clamping mechanism 15. The base 6 is mounted on the machine base 1. The first rotating sleeve 7 is rotatably mounted on the base 6. The first rotating disk 8 is fixed to the upper end of the rotating sleeve. A turntable drive assembly for driving the rotating platform is provided inside the base 6. The vacuum system 4 includes a second rotating sleeve 16, a second rotating disk 17, and a vacuum chamber 18 surrounding the second rotating disk 17.

[0054] The aforementioned base 6, first rotating sleeve 7, first rotating disk 8, bag bin 9, bag taking mechanism 10, bag feeding mechanism 11, bag opening mechanism 12, lifting hopper 13, first clamping mechanism 14, second clamping mechanism 15, second rotating sleeve 16, second rotating disk 17, and vacuum chamber 18 surrounding the second rotating disk 17 all adopt the mature structure of existing bag-feeding vacuum packaging machines. The air path structure of vacuum chamber 18 is the same as that of existing bag-feeding vacuum packaging machines, and will not be described again in this application.

[0055] The four-station bag-feeding vacuum packaging machine provided in this embodiment aims to achieve miniaturization and cost reduction by optimizing the station layout and structural integration, while ensuring packaging efficiency and functional adaptability to meet the production needs of micro and small enterprises. The specific implementation plan is as follows:

[0056] On the first rotating disk 8, four sets of clamping components 19 for clamping pre-made packaging bags are arranged radially along the circumference with the center of the first rotating disk 8 as the center. The first rotating disk 8 is set with four work stations according to the four divisions, and each set of clamping components 19 corresponds to one work station. The work station is switched cyclically as the first rotating disk 8 rotates.

[0057] The bag compartment 9, the bag taking mechanism 10 and the bag loading mechanism 11 are assembled on the frame 2 of the machine base 1 on the outside of the first station 20. The first clamping mechanism 14 is assembled on the base 6 on the inside of the first station 20. The first clamping mechanism 14 acts on the clamping assembly 19 that rotates to the first station 20 to open its bag clamping claw 84.

[0058] The lifting hopper 13 and the bag opening mechanism 12 are mounted on the frame 2 of the machine base 1 outside the second station 21. The bag opening mechanism 12 is configured to open the bag opening of the pre-made packaging bag held on the clamping assembly 19 that has rotated to the second station 21 by using the relative moving away action of the first suction cup 66 and the second suction cup 67. The lifting hopper 13 moves down so that its lower end is inserted into the pre-made packaging bag with the bag opening opened. The transfer mechanism 5 is located outside the fourth station 23.

[0059] On the second rotating disk 17, four vacuum chambers 18 are arranged radially along the circumference with the center of the second rotating disk 17 as the center. The vacuum chambers 18 correspond to the fourth station 23 of the filling and feeding system 3, and the vacuum chambers 18 are cyclically switched as the second rotating disk 17 rotates.

[0060] The operation flow of the four-station bag-feeding vacuum packaging machine provided in this embodiment is roughly as follows:

[0061] Pre-made packaging bags are placed in bag hopper 9. Bag retrieval mechanism 10 picks up pre-made packaging bags one by one from the bottom of bag hopper 9. Bag loading mechanism 11 moves to the position where it docks with bag retrieval mechanism 10, clamping the pre-made packaging bags taken out by bag retrieval mechanism 10. First rotating disk 8 drives clamping assembly to the first station 20. At this time, first opening clamping mechanism 14 abuts against the opening clamping post on clamping assembly 19, causing the clamping claws 84 at the end of clamping assembly 19 to open, and the pre-made packaging bags that have been clamped are then clamped. Bag loading mechanism 11 moves from the docking position of bag retrieval mechanism 10 to the first station 20, so that the pre-made packaging bags it clamps are located between the left and right sets of clamping claws 84 of clamping assembly 19 (or four clamping claws 84, each of the left and right sets of clamping claws 84 contains two clamping claws 84; if it is an M-type bag, four clamping claws 84 are generally used). Then the first opening clamping mechanism 14 resets, and the left and right sets of clamping claws 84 of clamping assembly 19 clamp the pre-made packaging bags. Bag loading mechanism 11... 1. Reset and wait for the next cycle; the first rotating disk 8 rotates one division, which drives the clamping component 19 of the pre-made packaging bag to rotate to the second station 21. At this time, the bag opening mechanism 12 is activated, using the first suction cup 66 and the second suction cup 67 to suck up both sides of the bag opening of the pre-made packaging bag. Then the first suction cup 66 and the second suction cup 67 separate to open the bag opening of the pre-made packaging bag. (At the same time as the bag opening mechanism 12 is activated, the movable disk 86 on the rotating sleeve, which can rotate relative to the rotating sleeve, cooperates with the clamping component adjusting swing arm 85 on the clamping component 19 to adjust the distance between the left and right clamping arms 84 in the clamping component 19. When the bag opening is opened, the distance between the two clamping arms 84 is reduced. This structure is a conventional and mature structure on the bag vacuum packaging machine, and this application will not elaborate on it.) After the bag opening is opened, the lifting hopper 13 is activated, inserting the lower end of the lifting hopper 13 into the opened bag opening of the pre-made packaging bag to prevent the material from slipping out during feeding. After the material is fed into the bag, the lifting hopper 13 resets, and the first suction cup 66 and the second suction cup 67 stop adsorbing the bag opening. The first rotating disk 8 continues to rotate, transferring the bag containing the material to the third station 22. The third station 22 is an expandable station, which can be expanded according to the actual packaging needs, such as secondary feeding, weighing, or coding. The first rotating disk 8 continues to rotate to the fourth station 23. The pre-made packaging bag held on the clamping component 19 at the fourth station 23 is transferred to the vacuum chamber 18 of the vacuum system 4 by the transfer mechanism 5. During docking, the vacuum chamber 18 is in the open state. After receiving the packaging bag filled with material, the vacuum chamber 18 is closed. Then the second rotating disk 17 rotates, switching to the next vacuum chamber 18 to receive the packaging bag filled with material, while the previous vacuum chamber 18 is closed. The operation of vacuuming, straightening the bag opening, and sealing is performed. After vacuum sealing is completed, the bag is discharged from the vacuum system 4.

[0062] The working principle and operation principle of the four-station bag-feeding vacuum packaging machine in this embodiment are similar to those of existing 8-station to 10-station and 10-station to 12-station bag-feeding vacuum packaging machines. No changes have been made to its operation principle and process, nor have the specific structure of the relevant components been modified. Only the number of stations and the layout of components have been improved to achieve equipment miniaturization and cost reduction.

[0063] In another preferred embodiment of this utility model, the transfer mechanism 5 adopts a "translational drive + bag clamping linkage" design. Compared with the traditional equipment that relies on reciprocating swing to achieve transfer, this significantly improves the stability and efficiency of the transfer of pre-packaged bags between the filling and feeding system 3 and the vacuum system 4. The specific solution is as follows:

[0064] Refer to the instruction manual appendix Figure 6 As shown, the transfer mechanism 5 includes a translation drive assembly 24, a transfer connecting arm 25, a fixed bag clamping plate 26, a movable bag clamping plate 27, and a bag clamping drive cylinder 28 that drives the movable bag clamping plate 27 to swing relative to the fixed bag clamping plate 26; the bottom of the transfer connecting arm 25 is mounted on the translation drive assembly 24, and the translation drive assembly 24 drives the transfer connecting arm 25 to reciprocate between the clamping assembly 19 of the fourth station 23 of the filling and feeding system 3 and the vacuum chamber 18 of the vacuum system 4; the upper end of the transfer connecting arm 25 A bag-clamping rotating bushing 29 is fixed, and a bag-clamping rotating shaft 30 is rotatably assembled inside the bag-clamping rotating bushing 29. The fixed bag-clamping plate 26 is fixed on the bag-clamping rotating bushing 29 and extends to the free end of the bag-clamping rotating shaft 30. The movable bag-clamping plate 27 is fixed to the free end of the bag-clamping rotating shaft 30. A bag-clamping swing arm 31 is fixedly connected to the driving end of the bag-clamping rotating shaft 30. The end of the bag-clamping driving cylinder 28 is hinged to the transfer connecting arm 25. The telescopic end of the bag-clamping driving cylinder 28 is hinged to the bag-clamping swing arm 31.

[0065] As an example of this embodiment, the translation drive component 24 may be a linear motor drive component, a servo motor + reducer + screw structure, etc.

[0066] As another preferred embodiment of this utility model, this embodiment provides a modular vacuum chamber 18 structure. The vacuum chamber 18 adopts an integrated modular structure of "box body 32 + cover body 33", integrating components such as the cover opening cylinder 34, sealing cylinder 36, bag clamping shaft, and bag clamping block into the vacuum chamber 18 to form an independent functional unit. The specific solution is as follows:

[0067] Refer to the instruction manual appendix Figure 7 and attached Figure 8As shown, the vacuum chamber 18 includes a box body 32 and a cover body 33. The cover body 33 is hinged to the box body 32 via a cover body connecting arm 35. A cover-opening cylinder 34 is provided on the back of the box body 32. The cylinder end of the cover-opening cylinder 34 is hinged to the box body 32 via a cylinder mounting seat, and the extended end of the cover-opening cylinder 34 is hinged to the cover body connecting arm 35 via a spherical bearing.

[0068] In one embodiment of this invention, a sealing cylinder 36 is fixed to the bottom of the box body 32, and the telescopic end of the sealing cylinder 36 extends into the box body 32 and connects with the sealing block 37; a sealing base that cooperates with the sealing block 37 is provided on the cover 33; a fixing plate 38 is provided below the sealing block 37, and the fixing plate 38 is fixedly assembled inside the box body 32. A first fixing bag clamping block 39 is provided at one end of the fixing plate 38, and a sliding plate 40 is slidably provided at the other end of the fixing plate 38. The sliding plate 40 is connected to the telescopic end of the sealing cylinder 36 extending into the box body 32 through a connecting plate 41. One end of the connecting plate 41 is hinged to the telescopic end of the sealing cylinder 36, and the other end is hinged to the sliding plate 40; the sliding plate A second fixed bag clamping block 42 is provided on the 40, and two rotatable bag clamping shafts are provided on the box body 32. The upper end of the first bag clamping shaft 43 is fixedly connected to the first movable bag clamping block 45 through the first bag clamping arm 44. The lower end of the first bag clamping shaft 43 extends out of the box body 32 and is hinged to one end of the cylinder through the first swing arm 46. The upper end of the second bag clamping shaft 47 is fixedly connected to the second bag clamping arm 48. The sliding plate 40 is axially connected to the end of the second bag clamping arm 48. The second bag clamping arm 48 and the third bag clamping arm 87 are connected together by bolts. The end of the third bag clamping arm 87 is provided with a second movable bag clamping block 49. The lower end of the second bag clamping shaft 47 extends out of the box body 32 and is hinged to the cylinder through the second swing arm 50.

[0069] As an example of this embodiment, a heating tube is inserted into the sealing block. The heating tube continuously heats the block, reducing costs while ensuring heating effect. Compared with the heating method of the heating block in the vacuum chamber of the existing bag-type vacuum packaging machine, which uses an electric heating element for heating and sealing and requires a cooling structure, the structure of the sealing block in this embodiment can significantly reduce equipment costs.

[0070] The sealing cylinder 36 and the bag clamping blocks on both sides form a linked structure, allowing the bag clamping blocks to straighten the bag opening while sealing, ensuring a good sealing effect. The sealing cylinder 36 can be configured as a double-stroke cylinder with two strokes. Before vacuuming, the sealing cylinder 36 extends its first stroke, applying pressure to the bag opening without completely closing it. Then, vacuuming is performed. Once the vacuum level in the vacuum chamber 18 reaches the set level, the sealing cylinder 36 extends its second stroke to heat-seal the bag opening, ensuring good sealing and vacuum performance.

[0071] The first bag clamping shaft 43 and the second bag clamping shaft 47 can rotate relative to the box body 32 under the action of the bottom cylinder, realizing the relative movement of the movable bag clamping block and the fixed bag clamping block, thereby realizing the clamping and release of the bag.

[0072] As another preferred embodiment of this utility model, please refer to the appendix to the specification. Figure 9 and attached Figure 11 As shown, an assembly structure integrating the bag opening mechanism 12 and the lifting hopper 13 into one station is illustrated. As an example, the lifting hopper 13 is connected to the lifting drive assembly 52 via a first connecting arm 51, and the lifting drive assembly 52 drives the lifting hopper 13 to rise and fall.

[0073] As another example, the lifting hopper 13 can be directly mounted on a linear actuator (such as a linear electric cylinder, pneumatic cylinder, etc.) to control its lifting and lowering.

[0074] As a preferred embodiment, the lifting drive assembly 52 includes a lifting mounting base 53, a lifting drive component 54, a mounting connecting frame 55, and a guide shaft 56. The lifting mounting base 53 is fixedly mounted on the frame 2, the lifting drive component 54 is mounted on the lifting mounting base 53, the telescopic end of the lifting drive component 54 is connected to the mounting connecting frame 55, the upper end of the guide shaft 56 is fixedly connected to the mounting connecting frame 55, and the lower end of the guide shaft 56 is slidably engaged with a guide shaft sleeve 57 fixedly mounted on the lifting mounting base 53. The first connecting arm 51 is mounted on the mounting connecting frame 55. The lifting drive component 54 can be a linear electric cylinder, a linear motor, a pneumatic cylinder, or a structure consisting of a servo motor + reducer + swing arm + connecting rod.

[0075] As another preferred embodiment of the present invention, this embodiment is an extended embodiment of the third workstation 22 (expandable workstation).

[0076] As one embodiment of this invention, two lifting hoppers 13 are provided, as shown in the attached instruction manual. Figure 5 As shown, the second lifting hopper 58 is located at the third station 22. It can use the same lifting drive assembly 52 as the lifting hopper 13, or use a lifting drive assembly 52 with a different structure. It is connected to the lifting drive assembly 52 of the lifting hopper 13 through the second connecting arm 59. The second lifting hopper 58 is located at the third station 22 through the setting of the second connecting arm 59, so as to realize the filling of two different materials (such as two materials, or adding a deoxidizer pack here).

[0077] As another implementation of this embodiment, if the coding function is required, the existing laser coding machine of the bag packaging machine can be directly installed and fixed on the frame 2 outside the third station 22. The coding point corresponds to the bag body position of the pre-made bag in the third station 22. The coding parameters are synchronously controlled through the touch screen, without the need for additional control module configuration.

[0078] As another preferred embodiment of this utility model, this embodiment further optimizes the structural layout of the four-station bag-feeding vacuum packaging machine to further achieve the effect of miniaturization and small footprint.

[0079] As one embodiment of this invention, please refer to the appendix to the specification. Figure 3 Appendix Figure 16 and attached Figure 17 As shown, the four-station bag-feeding packaging machine of this embodiment also includes an electrical box 60, which is located on the outside of the frame 2 corresponding to the first station 20. The electrical box 60 is concave, and the bag compartment 9 and the bag-taking mechanism 10 are respectively arranged in the groove 61 formed by the electrical box 60; the bag-taking mechanism 10 is located below the bag compartment 9; a touch screen is provided on the top of the electrical box 60 on one side of the bag compartment 9.

[0080] The electrical control box 60 has been optimized in its structural design to improve space utilization and ease of operation. This invention specifically optimizes the layout and structure of the electrical control box 60, placing it on the outside of the frame 2 corresponding to the first workstation 20. It adopts a concave design, fitting the bag compartment 9 and the bag-picking mechanism 10 into the recess 61 formed by the electrical control box 60, with the bag-picking mechanism 10 positioned below the bag compartment 9. A touchscreen display is also located on the top of the electrical control box 60 on one side of the bag compartment 9. From a space utilization perspective, the concave electrical control box 60 integrates the electrical control components, bag compartment 9, and bag-picking mechanism 10 into the same area through an embedded installation method, avoiding the need for separate components to occupy additional space. This further supports the miniaturization goal. Compared to the traditional method where the electrical control box 60 and bag-feeding components are set up independently, it saves 20%-30% of the external layout space. In terms of ease of operation, the touch screen is adjacent to the bag bin 9 and the bag picking mechanism 10. Operators can complete equipment parameter settings (such as packaging speed and feeding amount), bag replenishment in the bag bin 9, and bag picking status observation in the same operating area without having to travel back and forth between different areas of the equipment, reducing operating lines and improving work efficiency. At the same time, the "concave" structure provides a certain degree of protection for the bag bin 9 and the bag picking mechanism 10, reducing the impact of external interference on the stability of bag supply. The design of the bag picking mechanism 10 located below the bag bin 9 conforms to the bag supply logic of pre-made packaging bags falling naturally, reducing the risk of bag jamming and further ensuring the stability of continuous equipment operation.

[0081] Refer to the instruction manual appendix Figure 16 and attached Figure 17As shown, the bag compartment 9 is located above the bag-picking mechanism 10. The bag-picking suction cup of the bag-picking mechanism 10 moves up and down. When it moves upward, it moves to the bottom of the bag compartment 9 and contacts the pre-made packaging bag at the bottom of the bag compartment 9. Then, the bag-picking suction cup provides negative pressure to adsorb the pre-made packaging bag. When the bag-picking mechanism 10 moves downward, it removes the pre-made packaging bag held by the bag-picking suction cup from the bottom of the bag compartment 9. Then, the bag-loading mechanism 11 clamps the pre-made packaging bag and transfers it to the clamping assembly 19 of the first station 20. The bag compartment 9, the bag-picking mechanism 10, and the bag-loading mechanism 11 are all conventional structures of a bag packaging machine.

[0082] As another preferred embodiment of this utility model, although the bag opening mechanism 12 in this utility model can adopt an existing structure, this embodiment still proposes an optimized structure, as detailed in the appendix to the specification. Figure 9 Appendix Figure 10 and attached Figure 11 As shown, the bag opening mechanism 12 includes a bag opening mounting base 62, a bag opening servo motor assembly 63, a first bag opening arm 64, a second bag opening arm 65, a first suction cup 66, and a second suction cup 67. The bag opening mounting base 62 is mounted on the frame 2. The bag opening servo motor assembly 63 is fixedly mounted on the bag opening mounting base 62. The upper end of the first bag opening arm 64 is mounted on the output shaft of the bag opening servo motor assembly 63. The upper end of the second bag opening arm 65 is rotatably mounted on the bag opening mounting base 62. The connection end of the first bag opening arm 64 and the bag opening servo motor assembly 63 is provided with a suction cup 67. A first opening arm 68 extends in the direction of the second opening arm 65. A second opening arm 69 extends in the direction of the first opening arm 64 and is provided on the connecting end of the second opening arm 65 which is rotatably connected to the opening mounting base 62. The first opening arm 68 and the second opening arm 69 are connected by a transmission link 70. One end of the transmission link 70 is hinged to the first opening arm 68 and the other end of the transmission link 70 is hinged to the second opening arm 69. A first suction cup 66 is fixedly mounted on the lower end of the first opening arm 64 and a second suction cup 67 is fixedly mounted on the lower end of the second opening arm 65.

[0083] As another preferred embodiment of this invention, although the first clamping mechanism 14 and the second clamping mechanism 15 of this embodiment can adopt existing structures, this embodiment still proposes an optimized structure for the first clamping mechanism 14 and the second clamping mechanism 15, as detailed in the appendix to the specification. Figure 12 Appendix Figure 13 and attached Figure 14As shown, the first clamping mechanism 14 includes a first mounting support 71, a first transmission arm 72, a clamping connecting rod 73, a clamping swing arm 74, a clamping servo motor assembly 75, and a clamping push plate 76. The first mounting support 71 is fixedly mounted on the base 6. The first transmission arm 72 includes a first connecting part 77, a second connecting part 78, and a shaft connection part 79. The shaft connection part 79 is located between the first connecting part 77 and the second connecting part 78 and is triangularly distributed. The shaft connection part 79 is rotatably mounted on the first mounting support 71 via a rotating shaft. The clamping push plate 76 is mounted on the first connecting part 77. The clamping swing arm 74 is mounted on the output shaft of the clamping servo motor assembly 75. The lower end of the clamping connecting rod 73 is hinged to the clamping swing arm 74, and the upper end of the clamping connecting rod 73 is hinged to the second connecting part 78.

[0084] Refer to the instruction manual appendix Figure 15 As shown, the second clamping mechanism 15 includes a second mounting support 80, a second transmission arm 81, a second clamping drive member 82, and a clamping push plate 76. The second mounting support 80 is fixedly mounted on the base 6. The second transmission arm 81 includes a first connecting part 77, a second connecting part 78, and a shaft connection part 79. The shaft connection part 79 is located between the first connecting part 77 and the second connecting part 78 and is triangularly distributed. The shaft connection part 79 is rotatably mounted on the second mounting support 80 via a rotating shaft. The clamping push plate 76 is mounted on the first connecting part 77. The telescopic end of the second clamping drive member 82 is hinged to the second connecting part 78.

Claims

1. A four-station bag vacuum packaging machine, including a base (1), a filling and feeding system (3), a vacuum system (4) and a transfer mechanism (5). The filling and feeding system (3) and the vacuum system (4) are both set on the base (1). The transfer mechanism (5) is set between the filling and feeding system (3) and the vacuum system (4) to transfer the pre-made packaging bags that have been filled with materials in the filling and feeding system (3) to the vacuum chamber (18) of the vacuum system (4). The filling and feeding system (3) includes a base (6), a first rotating sleeve (7), a first rotating disk (8), a bag hopper (9), a bag taking mechanism (10), a bag loading mechanism (11), a bag opening mechanism (12), a lifting hopper (13), a first clamping mechanism (14), and a second clamping mechanism (15). The base (6) is mounted on the machine base (1). The first rotating sleeve (7) is rotatably mounted on the base (6). The first rotating disk (8) is fixed to the upper end of the rotating sleeve. A turntable drive assembly for driving the first rotating disk (8) to rotate is provided inside the base (6). The vacuum system (4) includes a second rotating sleeve (16), a second rotating disk (17), and a vacuum chamber (18) surrounding the second rotating disk (17). Its features are: On the first rotating disk (8), four sets of clamping components (19) for clamping pre-made packaging bags are arranged radially along the circumference with the center of the first rotating disk (8) as the center. The first rotating disk (8) is set with four work stations according to the four divisions. Each set of clamping components (19) corresponds to one work station. The work station is switched cyclically as the first rotating disk (8) rotates. The bag compartment (9), bag taking mechanism (10) and bag loading mechanism (11) are mounted on the frame (2) of the machine base (1) on the outside of the first station (20). The first clamping mechanism (14) is mounted on the base (6) on the inside of the first station (20). The first clamping mechanism (14) acts on the clamping assembly (19) that rotates to the first station (20) to open its bag clamping claws. The lifting hopper (13) and the bag opening mechanism (12) are mounted on the frame (2) of the machine base (1) outside the second station (21). The bag opening mechanism (12) is configured to open the bag mouth of the pre-made packaging bag held on the clamping assembly (19) rotated to the second station (21) by the relative moving away action of the first suction cup (66) and the second suction cup (67). The lifting hopper (13) moves down so that its lower end is inserted into the pre-made packaging bag with the bag mouth opened. The transfer mechanism (5) is located outside the fourth station (23). On the second rotating disk (17), four vacuum chambers (18) are arranged radially along the circumference with the center of the second rotating disk (17) as the center. The vacuum chambers (18) correspond to the fourth station (23) of the filling and feeding system (3). The vacuum chambers (18) are switched cyclically as the second rotating disk (17) rotates.

2. The four-station bag-feeding vacuum packaging machine as described in claim 1, characterized in that: The transfer mechanism (5) includes a translation drive assembly (24), a transfer connecting arm (25), a fixed bag clamping plate (26), a movable bag clamping plate (27), and a bag clamping drive cylinder (28) that drives the movable bag clamping plate (27) to swing relative to the fixed bag clamping plate (26); the bottom of the transfer connecting arm (25) is mounted on the translation drive assembly (24), and the translation drive assembly (24) drives the transfer connecting arm (25) to reciprocate between the clamping assembly (19) of the fourth station (23) of the filling and feeding system (3) and the vacuum chamber (18) of the vacuum system (4); the transfer connecting arm (25) A bag-clamping rotating shaft sleeve (29) is fixed at the upper end, and a bag-clamping rotating shaft (30) is rotatably assembled inside the bag-clamping rotating shaft sleeve (29). The fixed bag-clamping plate (26) is fixed on the bag-clamping rotating shaft sleeve (29) and extends to the free end of the bag-clamping rotating shaft (30). The movable bag-clamping plate (27) is fixed at the free end of the bag-clamping rotating shaft (30). A bag-clamping swing arm (31) is fixedly connected to the driving end of the bag-clamping rotating shaft (30). The end of the bag-clamping driving cylinder (28) is hinged to the transfer connecting arm (25). The telescopic end of the bag-clamping driving cylinder (28) is hinged to the bag-clamping swing arm (31).

3. The four-station bag-feeding vacuum packaging machine as described in claim 1 or 2, characterized in that: The vacuum chamber (18) includes a box body (32) and a cover body (33). The cover body (33) is hinged to the box body (32) via a cover body connecting arm (35). A cover-opening cylinder (34) is provided on the back of the box body (32). The cylinder end of the cover-opening cylinder (34) is hinged to the box body (32) via a cylinder mounting seat. The extended end of the cover-opening cylinder (34) is hinged to the cover body connecting arm (35) via a spherical bearing.

4. The four-station bag-feeding vacuum packaging machine as described in claim 3, characterized in that: A sealing cylinder (36) is fixed to the bottom of the box body (32). The telescopic end of the sealing cylinder (36) extends into the box body (32) and is connected to the sealing block (37). A sealing base that cooperates with the sealing block (37) is provided on the cover (33). A fixing plate (38) is provided below the sealing block (37). The fixing plate (38) is fixedly assembled in the box body (32). A first fixing bag clamping block (39) is provided at one end of the fixing plate (38). A sliding plate (40) is slidably provided at the other end of the fixing plate (38). The sliding plate (40) is connected to the telescopic end of the sealing cylinder (36) extending into the box body (32) through a connecting plate (41). One end of the connecting plate (41) is hinged to the telescopic end of the sealing cylinder (36), and the other end is hinged to the sliding plate (40). A sealing base that cooperates with the sealing block (37) is provided on the sliding plate (40). A second fixed bag clamping block (42) is provided. Two rotatable bag clamping shafts are provided on the box body (32). The upper end of the first bag clamping shaft (43) is fixedly connected to the first movable bag clamping block (45) through the first bag clamping arm (44). The lower end of the first bag clamping shaft (43) passes through the box body (32) and is hinged to one end of the cylinder through the first swing arm (46). The upper end of the second bag clamping shaft (47) is fixedly connected to the second bag clamping arm (48). The sliding plate (40) is axially connected to the end of the second bag clamping arm (48) and the third bag clamping arm (87) are connected together by bolts. The end of the third bag clamping arm (87) is provided with a second movable bag clamping block (49). The lower end of the second bag clamping shaft (47) passes through the box body (32) and is hinged to the cylinder through the second swing arm (50).

5. The four-station bag-feeding vacuum packaging machine as described in claim 1 or 2, characterized in that: The lifting hopper (13) is connected to the lifting drive assembly (52) via the first connecting arm (51), and the lifting drive assembly (52) drives the lifting hopper (13) to rise and fall.

6. The four-station bag-feeding vacuum packaging machine as described in claim 5, characterized in that: The lifting drive assembly (52) includes a lifting mounting base (53), a lifting drive component (54), a mounting bracket (55), and a guide shaft (56). The lifting mounting base (53) is fixedly mounted on the frame (2), the lifting drive component (54) is mounted on the lifting mounting base (53), the telescopic end of the lifting drive component (54) is connected to the mounting bracket (55), the upper end of the guide shaft (56) is fixedly connected to the mounting bracket (55), the lower end of the guide shaft (56) is slidably engaged with the guide sleeve (57) fixedly mounted on the lifting mounting base (53), and the first connecting arm (51) is mounted on the mounting bracket (55).

7. The four-station bag-feeding vacuum packaging machine as described in claim 1 or 2, characterized in that: The filling and feeding system (3) also includes a second lifting feeding hopper (58), which is positioned above the pre-made packaging bag held by the clamping assembly (19) that has been rotated to the third station (22).

8. The four-station bag-feeding vacuum packaging machine as described in claim 1 or 2, characterized in that: The lifting hopper (13) and the second lifting hopper (58) are both driven by the same lifting drive assembly (52); the lifting hopper (13) is connected to the lifting drive assembly (52) through the first connecting arm (51), and the second lifting hopper (58) is connected to the lifting drive assembly (52) through the second connecting arm (59).

9. The four-station bag-feeding vacuum packaging machine as described in claim 1 or 2, characterized in that: The four-station bag vacuum packaging machine also includes an electrical box (60), which is located on the outside of the frame (2) corresponding to the first station (20). The electrical box (60) is concave, and the bag compartment (9) and the bag taking mechanism (10) are respectively located in the groove (61) formed by the electrical box (60). The bag taking mechanism (10) is located below the bag compartment (9). A touch screen is provided on the top of the electrical box (60) on one side of the bag compartment (9).

10. The four-station bag-feeding vacuum packaging machine as described in claim 1 or 2, characterized in that: The bag opening mechanism (12) includes a bag opening mounting base (62), a bag opening servo motor assembly (63), a first bag opening arm (64), a second bag opening arm (65), a first suction cup (66), and a second suction cup (67). The bag opening mounting base (62) is mounted on the frame (2). The bag opening servo motor assembly (63) is fixedly mounted on the bag opening mounting base (62). The upper end of the first bag opening arm (64) is mounted on the output shaft of the bag opening servo motor assembly (63). The upper end of the second bag opening arm (65) is rotatably mounted on the bag opening mounting base (62). The connection end of the first bag opening arm (64) connected to the bag opening servo motor assembly (63) is provided with a suction cup for the second bag opening arm (67). A first bag-opening swing arm (68) extends in the direction of the bag-opening arm (65). A second bag-opening swing arm (69) extending in the direction of the first bag-opening arm (64) is provided on the connecting end of the second bag-opening arm (65) and the bag-opening mounting base (62). The first bag-opening swing arm (68) and the second bag-opening swing arm (69) are connected by a transmission link (70). One end of the transmission link (70) is hinged to the first bag-opening swing arm (68), and the other end of the transmission link (70) is hinged to the second bag-opening swing arm (69). A first suction cup (66) is fixedly mounted on the lower end of the first bag-opening arm (64), and a second suction cup (67) is fixedly mounted on the lower end of the second bag-opening arm (65).

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