Dual-feed bag vacuum packaging machine

Abstract

The application discloses a double-bag vacuum packaging machine, which has a rack, a bag bin bag taking mechanism capable of bagging and taking bags, a main machine rotary disc mechanism rotatably installed on the rack, a machine clamp mechanism, an upper bag mechanism, an opening clamp mechanism, a bag supporting mechanism and a bag moving mechanism.

Description

Technical Field

[0001] This invention belongs to the field of food packaging machine technology, and particularly relates to a double-bag vacuum packaging machine. Background Technology

[0002] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems:

[0003] Traditional vacuum packaging machines use a single-station, single-bag packaging method, and the corresponding mechanism adopts a single-station structure, resulting in low work efficiency.

[0004] CN104108486A discloses a bag-feeding vacuum packaging machine, including a rotary bag feeding device and a vacuuming device. The vacuuming device is provided in two sets, each with a feeding side. The feeding sides of the two sets of vacuuming devices are spaced apart and facing each other. A bag-removing device is provided at the spaced interval between the feeding sides of the two sets of vacuuming devices to remove the packaging bags fed by the rotary bag feeding device. Furthermore, each of the two sets of vacuuming devices is equipped with a bag-feeding device to send the packaging bags from the bag-removing device into the corresponding vacuuming device. However, this method also fails to solve the aforementioned technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a double-bag vacuum packaging machine, which changes the traditional single-station single-bag packaging method of vacuum packaging machines, realizes double packaging at a single station, and greatly speeds up the production speed of a single machine.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a double-bag vacuum packaging machine, comprising:

[0007] The frame, on which are arranged in sequence:

[0008] The bag retrieval mechanism is capable of loading and unloading bags; the bag retrieval mechanism can pick up two bags at a time.

[0009] The main turntable mechanism is rotatably mounted on the frame.

[0010] The main turntable mechanism is equipped with a series of clamping mechanisms, which are capable of clamping the bag body;

[0011] The bag loading mechanism can transfer the bag from the bag storage mechanism to the clamping mechanism;

[0012] The clamping mechanism can drive the clamping mechanism to open and close the clamps;

[0013] The bag-opening mechanism can open the bag opening on the clamping mechanism;

[0014] The bag transfer mechanism can send the bag filled with material from the clamping mechanism into the vacuum chamber;

[0015] A vacuum chamber is used to create a vacuum in a bag after it has been filled with materials.

[0016] One of the above technical solutions has the following advantages or beneficial effects: it changes the traditional single-station, single-bag packaging method of vacuum packaging machines, realizes double-bag packaging at a single station, and greatly speeds up the production speed of a single machine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the double-bag vacuum packaging machine provided in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of a double-bag vacuum packaging machine;

[0019] Figures 3-6 for Figure 1 A schematic diagram of the bag retrieval mechanism of a double-bag vacuum packaging machine;

[0020] Figures 7-9 for Figure 1 A schematic diagram of the clamping mechanism of a double-bag vacuum packaging machine;

[0021] Figures 10-12 for Figure 1 A schematic diagram of the opening clamp mechanism of a double-bag vacuum packaging machine;

[0022] Figures 13-18 for Figure 1 A schematic diagram of the main turntable mechanism of a double-bag vacuum packaging machine;

[0023] Figures 19-26 for Figure 1 A schematic diagram of the bag-supporting mechanism of a double-bag vacuum packaging machine;

[0024] Figures 27-34 for Figure 1 A schematic diagram of the bag transfer mechanism of a double-bag vacuum packaging machine;

[0025] Figures 35-37 for Figure 1 A schematic diagram of the vacuum chamber structure of a double-bag vacuum packaging machine;

[0026] The markings in the above figures are as follows: 1. Bag retrieval mechanism, 101. Bag feeding column, 102. Bag retrieval bottom plate, 103. Adjusting plate, 104. Bag retrieval upright plate, 105. Screw, 106. Nut block, 107. Handle, 108. Adjusting fork, 109. Suction nozzle seat, 1011. Suction nozzle, 1012. Bag retrieval shaft, 1013. Connecting plate, 1014. Bag retrieval connecting rod, 1015. Bag retrieval swing arm, 1016. Bag retrieval cam, 10161. Bag retrieval groove;

[0027] 2. Rack,

[0028] 3. Clamping mechanism, 301. Clamping body, 302. Fixed clamping block, 303. Push rod, 304. Pressure roller, 305. Movable clamping block, 306. Connector, 307. Linkage tooth, 308. Clamping seat, 309. Return spring, 3010. Screw, 3011. Synchronous lever;

[0029] 4. Clamp opening and closing mechanism, 401. Clamp opening seat, 402. Push-pull rod, 403. Clamp opening push plate, 404. First fixed block, 405. Alignment rod, 406. Second fixed block, 407. First pull rod, 408. First swing arm, 409. Second pull rod, 4010. Second swing arm, 4011. Clamp opening and closing cam, 4012. Bearing seat;

[0030] 5. Main unit turntable mechanism, 501. Fixed base, 502. Central rotating shaft, 503. Turntable, 504. Linkage mechanism, 5041. Pressure roller seat, 5042. Pressure roller swing arm, 5043. Adjusting pressure roller, 5044. Linkage rod; 505. Lifting and adjusting structure, 5051. Positioning seat, 5052. Positioning plate, 50521. Adjusting lever, 5053. Connecting ring, 5054. Adjusting bracket, 50541. Adjusting pin, 5055. Positioning frame, 5056. Electric push rod, 5057. Adjusting ring;

[0031] 6. Bag-opening mechanism: 601. Bag-opening center fixed shaft; 602. Bag-opening center rotating shaft; 603. Bag-opening lifting drive mechanism: 6031. Lifting joint; 6032. Lifting swing arm; 60321. Lifting connector; 60322. Cam follower; 6033. Lifting cam; 604. Bag-opening return mechanism: 6041. Bag-opening return rocker arm; 6042. Return linkage; 6043. Bag-opening return swing arm; 6044. Bag-opening return cam; 604... 5. Bag-supporting cam; 6046. Bag-supporting swing arm; 6047. Bag-supporting pull rod; 605. Bag-supporting structure; 6051. Bag-supporting rotating arm; 6052. Bag-supporting lifting rod; 6053. Lifting rod wheel; 6054. Outer swing rod; 6055. Bag-supporting tension spring; 6056. Lifting rod connecting shaft; 606. Bag rod assembly; 6061. Outer bag-supporting rod; 6062. Inner bag-supporting rod; 6063. First bag-supporting plate; 6064. Second bag-supporting plate; 6065. Proximity switch;

[0032] 7. Bag Transfer Mechanism: 701. Tracking Swing Arm; 702. Bag Feeding Stand; 703. Tracking Drive Mechanism; 7031. Tracking Secondary Pull Rod; 7032. Tracking Swing Rod; 7033. Tracking Rotary Shaft; 7034. Tracking Push-Pull Arm; 7035. Tracking Main Pull Rod; 7036. Tracking Swing Block; 7037. Tracking Cam; 704. Bag Feeding Drive Mechanism: 7041. Bag Feeding Secondary Pull Rod; 7042. Bag Feeding Swing Rod; 7043. Bag Feeding Rotary Shaft; 704... 4. Bag feeding push-pull arm; 7045. Bag feeding main pull rod; 7046. Bag feeding swing arm; 7047. Bag feeding cam; 705. Clamping mechanism; 7051. Bag clamping swing arm seat; 7052. Fixed clamping plate; 7053. First bag clamping rod; 7054. Bag clamping rocker arm; 7055. First bag clamping cylinder; 7056. First movable clamping plate; 7057. Second bag clamping rod; 7058. Rotary motor; 7059. Second movable clamping plate; 706. Bag pressing plate.

[0033] 8. Vacuum chamber; 801. Box body; 802. Heat sealing head; 803. Heat sealing cylinder; 804. Clamping beam; 805. First clamping block; 806. Clamping shaft; 807. Second clamping block; 808. Box cover; 809. Connecting rod; 8010. Drive rod. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] See Figures 1-2 A double-bag vacuum packaging machine, characterized by:

[0036] Frame 2, on which are arranged in sequence:

[0037] The bag retrieval mechanism 1 is capable of loading and unloading bags; the bag retrieval mechanism can pick up two bags at a time.

[0038] The main turntable mechanism 5 is rotatably mounted on the frame;

[0039] The main turntable mechanism 3 is equipped with a series of clamping mechanisms that can clamp the bag body.

[0040] The bag loading mechanism can transfer the bag from the bag storage mechanism to the clamping mechanism;

[0041] The clamping mechanism 4 can drive the clamping mechanism to open and close the clamps;

[0042] The bag-opening mechanism 6 can open the bag opening of the bag body on the clamping mechanism;

[0043] The bag transfer mechanism 7 is capable of sending the bag filled with material from the clamping mechanism into the vacuum chamber;

[0044] Vacuum chamber 8 is capable of evacuating the bag after it has been filled with material.

[0045] One of the above technical solutions has the following advantages or beneficial effects: it changes the traditional single-station, single-bag packaging method of vacuum packaging machines, realizes double-bag packaging at a single station, and greatly speeds up the production speed of a single machine.

[0046] Figures 3-6 This is a schematic diagram of the bag-collecting mechanism of a double-bag vacuum packaging machine; it features:

[0047] A bag storage base plate 102; a bag storage mechanism, mounted on the bag storage base plate 102; two sets of bag storage mechanisms are arranged side-by-side on the bag storage base plate 102, each bag storage mechanism including two bag storage upright plates 104, which are slidably mounted on the bag storage base plate 102 and can accommodate bags; a bag storage adjustment mechanism is also provided to adjust the sliding of the two bag storages; by using two bag storage mechanisms arranged side-by-side, two sets of bags can be accommodated, changing the traditional single-station, single-bag packaging method of vacuum packaging machines to achieve single-station, double-bag loading and unloading, significantly accelerating the production speed of a single machine. The bag storage mechanism adopts an adjustable structure to adapt to the needs of bags of different sizes.

[0048] The suction bag mechanism is located below the bag storage mechanism. This mechanism can move and suction the bag from the bottom of the bag storage mechanism. By moving up and down, the suction bag mechanism sucks the bag from the bottom of the bag storage mechanism and detaches it, making it easier for the subsequent bag loading mechanism to grasp it.

[0049] The bag suction mechanism includes a nozzle seat 109 and a bag-collecting shaft 1012. The bag-collecting shaft 1012 is movably mounted on the frame, and the nozzle seat 109 is mounted on the upper end of the bag-collecting shaft 1012. The nozzle seat 109 is provided with a nozzle 1011 capable of adsorbing the bag. A driving power mechanism for driving the bag-collecting shaft 1012 is also provided. The up-and-down movement of the bag-collecting shaft 1012 drives the nozzle seat 109 to move up and down, thereby causing the suction cup to adsorb the bag at the bottom of the bag storage mechanism and detach it from the bag storage mechanism, facilitating subsequent bag loading by the bag-collecting mechanism.

[0050] The bag-retrieving power mechanism comprises: a bag-retrieving swing arm 1015, the first end of which is hinged to the frame; a bag-retrieving cam 1016, rotatably mounted on the frame, with the bag-retrieving swing arm 1015 slidably mounted in a bag-retrieving groove 10161 on the bag-retrieving cam 1016 near the middle; a bag-retrieving connecting rod 1014, the first end of which is hinged to the second end of the bag-retrieving swing arm 1015; and a connecting plate 1013, connecting the bag-retrieving shafts 1012 of the two bag-holding mechanisms; the second end of the bag-retrieving connecting rod 1014 is hinged to the connecting plate 1013. The rotation of the bag-retrieving cam 1016 drives the swing arm 1015 to swing, thereby transmitting power to the bag-retrieving connecting rod 1014 and the connecting plate 1013, which in turn drives the bag-retrieving shaft 1012 to move up and down. The cam mechanism is a mechanical drive mechanism, ensuring stable and reliable operation.

[0051] The bag adjustment mechanism includes a nut block 106 and a lead screw 105. The nut block 106 is mounted on the adjustment plate 103, and the two ends of the lead screw 105 have threads with opposite directions of rotation. The threads at both ends of the lead screw 105 respectively engage with the nut blocks 106 of the two adjustment plates 103. By rotating the lead screw 105, the adjustment plates 103 on both sides move in the same or opposite directions, thereby adjusting the width of the bag to accommodate the needs of bags of different sizes.

[0052] An adjustable fork 108 is also provided on the bottom plate 102 of the bag compartment. The adjustable fork 108 is located between the two upright plates 104 of the bag compartment and can limit the end of the bag body. The adjustable fork 108 can limit the front end of the bag body, and together with the upright plates 104 on both sides of the bag compartment to limit the sides and rear end of the bag body, a reliable limit of the bag body is achieved. A stack of bags can be stacked in the bag compartment mechanism.

[0053] It also has a bag feeding column 101, which is installed on the frame, and the bag bin bottom plate 102 is installed on the bag feeding column 101 to provide support.

[0054] The end of the lead screw 105 is also provided with a handle 107 for easy adjustment of the lead screw 105.

[0055] Advantages: It achieves automatic bag placement and automatic bag unloading. When used in conjunction with a double-packaging vacuum packaging machine, it changes the traditional single-station, single-bag packaging method of vacuum packaging machines, enabling single-station double-packaging and significantly increasing the production speed of a single machine.

[0056] Figures 7-9 A schematic diagram of the clamping mechanism of a double-bag vacuum packaging machine; featuring:

[0057] The machine features two sets of clamping structures connected by a linkage mechanism. This linkage mechanism changes the traditional single-station, single-bag packaging method of vacuum packaging machines, enabling double-bag filling and clamping at a single station, significantly accelerating the production speed of a single machine.

[0058] The clamping structure includes: two sets of compatible clamping bodies 301; the first end of each clamping body 301 is rotatably mounted on a frame; a fixed clamping block 302 is provided on the second end of each clamping body 301; a push rod 303 is movably mounted inside the clamping body 301; the first end of the push rod 303 is provided with a pressure roller 304 extending out of the clamping body 301; the second end of the push rod 303 is provided with a movable clamping block 305 extending out of the clamping body 301, and the movable clamping block 305 and the fixed clamping block 302 can cooperate to clamp the bag. By driving the push rod 303 to move, the opening and closing of the movable clamping block 305 and the fixed clamping block 302 of the push rod 303 is realized, thereby achieving the function of clamping or releasing the bag.

[0059] The first end of the movable clamping block 305 is hinged to the fixed clamping block 302; the middle part of the movable clamping block 305 is hinged to the first end of the connector 306, and the second end of the connector 306 is hinged to the second end of the push rod 303. By driving the push rod 303 to move, the push rod 303 drives the connector 306, and the connector 306 in turn drives the movable clamping block 305 to swing around the fixed clamping block 302, thereby realizing the opening and closing between the movable clamping block 305 and the fixed clamping block 302, and realizing the function of clamping or releasing the bag.

[0060] The linkage mechanism consists of linkage teeth 307. Each adjacent clamping body 301 of the two sets of clamping structures has a linkage tooth 307, and the two linkage teeth 307 mesh with each other. Each linkage tooth 307 is also equipped with a synchronizing block 3011. By activating one linkage tooth 307 using the synchronizing block 3011, the other linkage tooth 307 is activated, thus achieving the linkage adjustment of the opening and closing angles of the two sets of clamping structures. Adjusting the opening and closing angle of one set of clamping structures allows for the tightening and loosening of the bag opening. Loosening the bag opening facilitates material filling, while tightening the bag opening facilitates subsequent sealing operations.

[0061] It also has a clamping base 308, with the clamping body 301 fixedly mounted on the clamping body, and synchronous locking teeth mounted on the clamping base 308; the synchronous locking teeth of the two sets of clamping bases 308 in the clamping structure mesh with each other. The clamping base 308 is used to install each structure.

[0062] A return spring 309 is also fitted on the push rod 303 to return the push rod 303 to its original position.

[0063] The clamp base 308 is rotatably mounted on the frame via the screw shaft 3010, thereby enabling adjustment of the opening and closing angle of the clamp structure.

[0064] Figures 10-12 A schematic diagram of the opening clamping mechanism of a double-bag vacuum packaging machine; featuring:

[0065] The release clamp 401 is installed on the frame; the push-pull rod 402 is hinged to the push-pull rod 402 near its middle part; the release clamp push plate 403 is hinged to the first end of the push-pull rod 402; the swing of the push-pull rod 402 drives the release clamp push plate 403 to push the pressure roller 304 of the machine clamping mechanism, thereby driving the machine clamping mechanism to clamp or release the bag body.

[0066] The clamping mechanism is connected to the second end of the push-pull rod 402 and can drive the push-pull rod 402 to swing; it serves to drive the push-pull rod 402 to swing.

[0067] The alignment mechanism is mounted on the opening frame base. It is connected to the opening clamp push plate 403 and maintains the posture of the opening clamp push plate 403. During use, the alignment mechanism maintains the posture of the opening clamp push plate 403, ensuring stable and reliable contact between the opening clamp push plate 403 and the pressure roller 304, resulting in a long service life.

[0068] The straightening mechanism has a first fixed block 404, a straightening rod 405, and a second fixed block 406. The first fixed block 404 is fixed to the clamping push plate 403, and the second fixed block 406 is fixed to the loosening clamp seat 401. The two ends of the straightening rod 405 are hinged to the first fixed block 404 and the second fixed block 406, respectively. The hinge points of the push-pull rod 402 and the clamping push plate 403, the push-pull rod 402 and the loosening clamp seat 401, the straightening rod 405 and the first fixed block 404, and the straightening rod 405 and the second fixed block form a parallelogram. During the swinging process, the parallelogram maintains the posture of the clamping push plate 403 and ensures surface contact between the clamping push plate 403 and the pressure roller 304, resulting in stable and reliable contact and a long service life.

[0069] The clamping mechanism includes a first pull rod 407, a first swing arm 408, a second pull rod 409, and a second swing arm 4010. The first end of the first pull rod 407 is hinged to the second end of the push-pull rod 402; the first end of the first swing arm 408 is hinged to the second end of the first pull rod 407; the first end of the second pull rod 409 is hinged to the second end of the first swing arm 408; and the first end of the second swing arm 4010 is hinged to the second end of the second pull rod 409. An clamping cam 4011 is also provided to drive the second swing arm 4010 to swing, and the second swing arm 4010 is hinged to the side of the clamping cam 4011 near its middle portion. The rotation of the opening and closing cam 4011 drives the second swing arm 4010, which in turn drives the second pull rod 409. The second pull rod 409 drives the first swing arm 408, which in turn drives the first pull rod 407. The first pull rod 407 drives the push-pull rod 402 to swing. The swing of the push-pull rod 402 drives the opening push plate 403 to push the pressure roller 304 of the clamping mechanism, thereby causing the clamping mechanism to clamp or release the bag.

[0070] The second end of the second swing arm 4010 is hinged to the bearing housing 4012, which is mounted on the frame to provide a mounting swing base for the second end of the second swing arm 4010.

[0071] Figures 13-18 A schematic diagram of the main turntable mechanism of the double-bag vacuum packaging machine; featuring:

[0072] Fixed base 501 serves to install and fix the device. Central rotating shaft 502 passes through fixed base 501 and is rotatably installed inside fixed base 501; turntable 503 is fixedly installed on the first end of central rotating shaft 502; the rotation of central rotating shaft 502 drives the rotation of turntable 503, thereby driving the clamped bag to rotate to different work positions.

[0073] The outer periphery of the turntable 503 is provided with a series of clamping mechanisms 3; the clamping mechanisms 3 can clamp the bag body and rotate the bag body to different work positions by rotating the turntable 503.

[0074] The linkage mechanism, mounted on turntable 503, adjusts the opening degree of the clamping mechanism 3. This adjustment accommodates different bag sizes. During operation, the linkage mechanism also adjusts the opening degree of the clamping mechanism 3, squeezing the bag opening inwards to facilitate material filling. After filling, the linkage mechanism tightens the clamping mechanism 3, facilitating subsequent vacuuming.

[0075] The lifting and adjusting structure 505 is slidably mounted on the central rotating shaft 502 and can drive the linkage mechanism. The lifting and adjusting structure 505 adjusts the overall opening degree of the bag to accommodate different bag sizes.

[0076] The linkage mechanism comprises a linkage mechanism 504, a pressure roller swing arm 5042, an adjusting pressure roller 5043, and a linkage rod 5044. The linkage mechanism 504 is mounted on a turntable 503. The pressure roller swing arm 5042 is hinged to the linkage mechanism 504 near its middle. The adjusting pressure roller 5043 is mounted on the first end of the pressure roller swing arm 5042. The first end of the linkage rod 5044 is hinged to the second end of the pressure roller swing arm 5042. The second end of the linkage rod 5044 is connected to the clamping mechanism 3. By pushing the adjusting pressure roller 5043, the pressure roller swing arm 5042 swings, thereby moving the linkage rod 5044. The linkage rod 5044 pulls the clamping mechanism 3, changing the overall opening degree of the clamping mechanism 3 to accommodate different bag sizes. During use, adjusting the linkage mechanism dynamically adjusts the opening degree of the clamping mechanism 3, enabling the bag opening to be squeezed inwards, thus facilitating material filling. After the material is filled, the linkage mechanism drives the adjustment mechanism 3 to tighten the bag opening, which facilitates the subsequent vacuuming action.

[0077] The lifting and adjusting structure 505 includes: a positioning seat 5051, slidably mounted on a fixed seat 501; a positioning disk 5052, rotatably mounted on the upper end of the positioning seat 5051; an adjusting ring 5057, mounted on the positioning disk 5052, the upper surface of the adjusting ring 5057 being adapted to the linkage mechanism; a connecting ring 5053, mounted on the lower end of the positioning seat 5051; and a lifting drive mechanism capable of adjusting the lifting and lowering of the connecting ring 5053. The positioning seat 5051 serves as a positioning and mounting base, and can slide entirely on the fixed seat 501. The positioning seat 5051 also provides a mounting base for the positioning disk 5052 and the adjusting ring 5057. The positioning plate 5052 is rotatably mounted on the positioning seat 5051. An adjusting ring 5057 is fixedly mounted on the positioning plate 5052. The adjusting ring 5057 is similar to a cam structure. By adapting the cam structure of the adjusting ring 5057 to the linkage mechanism, the linkage mechanism can be driven to move during the rotation of the positioning plate 5052. The linkage mechanism drives the adjustment of the opening degree of the clamping mechanism 3, loosening or tightening the bag opening to facilitate subsequent feeding or vacuuming operations.

[0078] The lifting drive mechanism includes: an adjusting bracket 5054, disposed on the outside of the connecting ring 5053; the adjusting bracket 5054 is hinged to the connecting ring 5053 via an adjusting pin 50541; a positioning frame 5055, the first end of which is mounted on the fixed base 501, and the second end of the positioning frame 5055 is hinged to the first side of the adjusting bracket 5054; and a pushing mechanism, disposed on the second side of the adjusting bracket 5054, and hinged to the second side of the adjusting bracket 5054. The adjusting bracket 5054 is hinged to the connecting ring 5053 at its center, and the hinged positioning frame 5055 on the first side of the adjusting bracket 5054 provides support; the pushing mechanism on the second side of the adjusting bracket 5054 provides a pushing function. During operation, the pushing mechanism pushes the second side of the adjusting bracket 5054, causing the adjusting bracket 5054 to rotate around the positioning frame 5055 on the first side, creating an inclined angle. This causes the central pin to move upward, thereby raising the connecting ring 5053 connected to the adjusting bracket 5054, achieving the purpose of pushing the linkage mechanism, and thus adjusting the overall opening degree of the bag to adapt to the use of different bag models.

[0079] The actuating mechanism is an electric push rod 5056, the bottom of which is mounted on the fixed base 501. The piston rod of the electric push rod 5056 is hinged to the adjusting bracket 5054. The electric push rod 5056 provides power for the movement of the adjusting bracket 5054.

[0080] The positioning plate 5052 is rotatably mounted on the positioning seat 5051 via bearings, ensuring stable and reliable rotation.

[0081] The positioning plate 5052 is also equipped with an adjustment lever 50521. The adjustment lever 50521 can be connected to the adjustment power mechanism. The adjustment lever 50521 is driven by the external adjustment power mechanism, which drives the positioning plate 5052 to rotate, thereby driving the linkage mechanism. The linkage mechanism drives the adjustment of the opening degree of the clamping mechanism 3, loosening or tightening the bag opening to facilitate subsequent feeding or vacuuming operations.

[0082] The second end of the linkage rod 5044 is connected to the synchronous block 3011 of the clamping mechanism 3. The linkage rod 5044 drives the synchronous block 3011 of the clamping mechanism 3, thereby adjusting the opening and closing degree of the clamping mechanism 3.

[0083] The upper part of the positioning seat 5051 is also equipped with a waterproof cover, which serves to provide waterproof protection.

[0084] Figures 19-26 A schematic diagram of the bag-supporting mechanism of a double-bag vacuum packaging machine; featuring:

[0085] Bag-supporting rotating arm 6051; bag rod assembly 606, mounted on bag-supporting rotating arm 6051, bag rod assembly 606 can support two sets of bags; bag-supporting structure 605, mounted on bag-supporting rotating arm 6051, bag-supporting structure 605 can operate bag rod assembly 606, thereby controlling the opening of the bag.

[0086] The bag-supporting return mechanism 604 drives the bag-supporting structure 605 to move; it can drive the bag-supporting structure 605 to move, thereby controlling the opening of the bag body.

[0087] The bag lifting drive mechanism 603 can drive the bag lifting arm 6051 to lift and lower, thereby driving the bag rod assembly 606 to lift and lower, realizing the action of inserting or detaching from the bag body.

[0088] The bag rod assembly 606 includes a pair of outer support bag rods 6061 and inner support bag rods 6062. The outer support bag rods 6061 and 6062 are rotatably mounted on the bag-supporting rotating arm 6051. The inner support bag rod 6062 is rotatably mounted inside the outer support bag rod 6061, with its first end extending out of the outer support bag rod 6061. A first bag-supporting piece 6063 is provided on the outer support bag rod 6061, and a second bag-supporting piece 6064 is provided on the inner support bag rod 6062. By installing the first bag-supporting piece 6063 and the second bag-supporting piece 6064 on the outer support bag rods 6061 and 6062 respectively, the traditional single-station, single-bag packaging method of vacuum packaging machines is changed, achieving double-bag packaging at a single station, significantly accelerating the production speed of a single machine.

[0089] The bag support structure 605 has two sets, and the two sets of bag support structures 605 are respectively connected to the outer bag support rod 6061 and the inner bag support rod 6062. The bag support structure 605 has the following function: the two sets of bag support structures 605 respectively control the outer bag support rod 6061 and the inner bag support rod 6062.

[0090] The outer swing rod 6054 is fixedly connected near the middle of the two sets of bag-supporting structures 605 to the outer bag-supporting rod 6061 and the inner bag-supporting rod 6062, respectively. The first end of the outer swing rod 6054 forms the actuating end, and the second end forms the moving end. The bag-supporting lifting rod 6052 is rotatably mounted on the bag-supporting rotating arm 6051. The actuating ends of the outer swing rods 6054 of the two outer bag-supporting rods 6061 are adapted to the first bag-supporting lifting rod 6052; the actuating ends of the outer swing rods 6054 of the two inner bag-supporting rods 6062 are adapted to the second bag-supporting lifting rod 6052. When the bag-supporting lifting rod 6052 is raised, it drives the actuating end of the first end of the outer swing rod 6054, thereby causing the outer swing rod 6054 to rotate. The outer swing rod 6054 then drives the outer bag-supporting rods 6061 and the inner bag-supporting rods 6062 to rotate, thus realizing the bag-supporting action.

[0091] The first bag-supporting spring 6055 connects to the moving ends of the outer swing rods 6054 of the two outer bag-supporting rods 6061; the second bag-supporting spring 6055 connects to the moving ends of the outer swing rods 6054 of the two inner bag-supporting rods 6062. The bag-supporting spring 6055 tightens the moving ends of the outer swing rods 6054 of the two outer bag-supporting rods 6061, so that the first bag-supporting piece 6063 and the second bag-supporting piece 6064 are initially in the open bag state. The bag-supporting return mechanism 604 drives the movement to overcome the elastic force of the bag-supporting spring 6055 and close the first bag-supporting piece 6063 and the second bag-supporting piece 6064, making it easy to insert the bag.

[0092] Two bag-supporting lifting rods 6052 are fixedly connected by a lifting rod connecting shaft 6056, which is rotatably mounted on the bag-supporting rotating arm 6051. The lifting rod connecting shaft 6056 is linked to the movement of the two bag-supporting lifting rods 6052. A lifting rod drive end is also fixedly mounted on the lifting rod connecting shaft 6056, which can be connected to the bag-supporting return power mechanism. The bag-supporting return power mechanism drives the lifting rod drive end, thereby actuating the bag-supporting lifting rods 6052.

[0093] The bag-supporting return mechanism 604 includes: a bag-supporting swing rod 6046, which is rotatably mounted on the bag-supporting rotating arm 6051; a bag-supporting pull rod 6047, the first end of which is hinged to the first end of the bag-supporting swing rod 6046, and the second end of the bag-supporting pull rod 6047 is connected to the lifting rod drive end; the bag-supporting swing rod 6046 pulls the bag-supporting pull rod 6047, and the bag-supporting pull rod 6047 pulls the movement of the lifting rod drive end.

[0094] The bag-supporting return mechanism drives the second end of the bag-supporting swing arm 6046 to move. The bag-supporting return mechanism includes: a bag-supporting central fixed shaft 601, fixedly mounted on the frame; a bag-supporting cam 6045, fixedly mounted on the first end of the bag-supporting central fixed shaft 601, which drives the second end of the bag-supporting swing arm 6046 to move; a bag-supporting central rotating shaft 602, rotatably mounted on the bag-supporting central fixed shaft 601; and a bag-supporting rotating arm 6051 fixedly mounted on the bag-supporting central rotating shaft 602, which drives the bag-supporting rotating arm 6051 to swing. Rotation of the bag-supporting central rotating shaft 602 causes the bag-supporting rotating arm 6051, fixed on the shaft, to rotate, thus moving the bag closer to or further away from the vacuum chamber. The bag-supporting rotating arm 6051 is fixed, but the bag-supporting center fixed shaft 601 and the bag-supporting cam 6045 are fixed. The bag-supporting swing rod 6046 rotates around the bag-supporting cam 6045. By cooperating with the bag-supporting cam 6045, the posture is changed to achieve the purpose of driving.

[0095] A rotating power mechanism drives the central pivot 602 of the bag-supporting mechanism to rotate. The rotating power mechanism includes: a bag-supporting return rocker arm 6041, the first end of which is fixedly connected to the central pivot 602; a return linkage 6042, the first end of which is hinged to the second end of the bag-supporting return rocker arm 6041; a bag-supporting return swing arm 6043, the first end of which is hinged to the frame, and the second end of which is hinged to the second end of the return linkage 6042; and a bag-supporting return cam 6044, rotatably mounted on the frame, with the middle portion of the swing arm 6043 adapted to the cam. The cam 6044 drives the swing arm 6043 to swing, which in turn drives the rocker arm 6041, which in turn drives the central pivot 602 to rotate.

[0096] The bag-supporting lifting drive mechanism 603 includes: a lifting joint 6031 connected to the bag-supporting central rotating shaft 602; a lifting swing rod 6032, the first end of which is adapted to the lifting joint 6031; the lifting swing rod 6032 is hinged to a bracket near its middle; and a lifting cam 6033 rotatably mounted on the bracket, the second end of the lifting swing rod 6032 being adapted to the lifting cam 6033. The lifting cam 6033 drives the lifting swing rod 6032, which in turn drives the lifting connector 60321. The cam follower 60322 on the lifting connector 60321 drives the lifting cam 6033, which in turn drives the bag-supporting central rotating shaft 602 to rise and fall, thereby realizing the lifting and falling of the bag rod assembly 606 and achieving the insertion or detachment of the bag from the bag body.

[0097] The bag-supporting rotating arm 6051 is also equipped with a proximity switch 6065 for sensing the outer swing arm 6054. Since the opening of the bag-supporting plate is pulled open by a spring, but there is no support point at the lower end, when a bag is caught on the bag-supporting plate, the bag-supporting plate cannot continue to open. The connected swing arm will also stop at this angle and will not be detected by the detection switch below. In this case, it is considered that the bag is open. However, if one or both of the bag-supporting plates are not caught by the bag opening, it will continue to open to the maximum. The connected swing arm will then rest on the detection switch and be detected. In this case, it is considered that the bag has not been opened.

[0098] Figures 27-34This is a schematic diagram of the bag-transfer mechanism of a double-bag vacuum packaging machine. It includes: a tracking swing arm 701 mounted on the machine's column; a bag-feeding stand 702, oscillatingly mounted on the tracking swing arm 701; and a bag-feeding drive mechanism 704 that drives the bag-feeding stand 702 to oscillate. The bag-feeding drive mechanism 704 enables the bag-feeding stand 702 to oscillate, transferring the bag from the turntable to the vacuum chamber for vacuuming. A clamping mechanism is mounted on the bag-feeding stand 702, and includes a first clamping mechanism and a second clamping mechanism, each capable of clamping one bag. By clamping one bag at a time using the first and second clamping mechanisms, the traditional single-station, single-bag packaging method of vacuum packaging machines is changed, enabling double-bag transfer at a single station, significantly accelerating the production speed of a single machine.

[0099] The clamping mechanism has a bag-clamping swing arm seat 7051, which is mounted on the tracking swing arm 701; a fixed clamping plate 7052 is fixedly mounted on the bag-clamping swing arm seat 7051. The fixed clamping plate 7052 serves as a common fixed end for the first clamping mechanism and the second clamping mechanism. The first clamping mechanism and the second clamping mechanism each have a movable end that is adapted to the fixed clamping plate 7052 to clamp the bag.

[0100] The first clamping mechanism has a first bag-clamping rod 7053, which is rotatably mounted inside a bag-clamping swing arm seat 7051. A first movable clamping plate 7056, which can be adapted to a fixed clamping plate 7052, is fixedly provided on the first bag-clamping rod 7053. The bag-clamping swing arm seat 7051 is also provided with a first power mechanism for driving the first bag-clamping rod 7053 to rotate. The rotation of the first bag-clamping rod 7053 drives the first movable clamping plate 7056 to move, and the first movable clamping plate 7056 is adapted to the fixed clamping plate 7052 to clamp the bag.

[0101] The second clamping mechanism includes a second bag-clamping rod 7057, which is rotatably mounted inside the first bag-clamping rod 7053. A first end of the second bag-clamping rod 7057 extends outwards, and a second movable clamping plate 7059, adapted to the fixed clamping plate 7052, is fixedly mounted on the first end of the second bag-clamping rod 7057. The mechanism also includes a second power mechanism for driving the second bag-clamping rod 7057 to rotate. The rotation of the second bag-clamping rod 7057 drives the second movable clamping plate 7059 to move, and the second movable clamping plate 7059 adapts to the fixed clamping plate 7052 to clamp the bag.

[0102] The first power mechanism includes a bag-clamping rocker arm 7054 and a first bag-clamping cylinder 7055. The first bag-clamping cylinder 7055 is hinged to the tracking rocker arm 701. The piston rod of the first bag-clamping cylinder 7055 is hinged to the first end of the bag-clamping rocker arm 7054, and the second end of the bag-clamping rocker arm 7054 is fixed to the first bag-clamping rod 7053. The first bag-clamping cylinder 7055 drives the bag-clamping rocker arm 7054 to swing, which in turn drives the first bag-clamping rod 7053 to rotate, thereby driving the first movable clamping plate 7056 to move. The first movable clamping plate 7056 is adapted to the fixed clamping plate 7052 to clamp the bag.

[0103] The second power mechanism is a rotary motor 7058, which is mounted on the bag-clamping swing arm seat 7051. The rotating shaft of the rotary motor 7058 is connected to the second end of the second bag-clamping rod 7057. The rotary motor 7058 drives the second bag-clamping rod 7057 to rotate, thereby driving the second movable clamping plate 7059 to move. The second movable clamping plate 7059 is adapted to the fixed clamping plate 7052 to clamp the bag.

[0104] The bag feeding drive mechanism 704 includes: a secondary bag feeding pull rod 7041, the first end of which is hinged to the bag feeding stand 702; a bag feeding rotating shaft 7043, rotatably mounted on the frame of the packaging machine; a bag feeding swing arm 7042, the first end of which is hinged to the second end of the secondary bag feeding pull rod 7041, and the second end is fixedly connected to the first end of the bag feeding rotating shaft 7043; a bag feeding push-pull arm 7044, the first end of which is fixedly connected to the second end of the bag feeding rotating shaft 7043; a main bag feeding pull rod 7045, the first end of which is hinged to the second end of the bag feeding push-pull arm 7044; a bag feeding swing arm 7046, which is hinged to the frame near its middle portion, and the first end of the bag feeding swing arm 7046 is hinged to the second end of the main bag feeding pull rod 7045; and a bag feeding cam 7047, rotatably mounted on the frame, and the second end of the bag feeding swing arm 7046 is adapted to the bag feeding cam 7047. The bag feeding cam 7047 drives the bag feeding linkage mechanism to move, thereby causing the bag feeding stand 702 to swing and send the bag from the turntable to the vacuum chamber for vacuuming.

[0105] The tracking swing arm 701 is rotatably mounted on the column of the packaging machine, and a tracking swing arm 701 drive mechanism is also provided to drive the tracking swing arm 701 to swing. The tracking swing arm 701 drive mechanism can drive the tracking swing arm 701 to swing, thereby driving the clamping mechanism to rotate around the turntable of the vacuum chamber, so that the clamping mechanism follows the rotation of the turntable of the vacuum chamber. When the bag is sent into the vacuum chamber, the vacuum chamber does not need to be stopped and can continue to rotate.

[0106] The tracking swing arm drive mechanism includes: a tracking secondary pull rod 7031, the first end of which is hinged to the tracking swing arm 701; a bag feeding shaft 7043, rotatably mounted on the frame of the packaging machine; a tracking swing rod 7032, the first end of which is hinged to the second end of the tracking secondary pull rod 7031, and the second end is fixedly connected to the first end of the bag feeding shaft 7043; a tracking push-pull arm 7034, the first end of which is fixedly connected to the second end of the bag feeding shaft 7043; a tracking main pull rod 7035, the first end of which is hinged to the second end of the tracking push-pull arm 7034; a tracking swing block 7036, which is hinged to the frame near its middle portion, and the first end of the tracking swing arm 701 is hinged to the second end of the tracking main pull rod 7035; and a tracking cam 7037, rotatably mounted on the frame, and the second end of the tracking swing block 7036 is adapted to the tracking cam 7037. The tracking cam 7037 drives the tracking linkage mechanism, which in turn drives the tracking swing block 7036 to swing, thereby causing the clamping mechanism to rotate around the turntable of the vacuum chamber. This allows the clamping mechanism to follow the rotation of the turntable of the vacuum chamber, so that the vacuum chamber does not need to be stopped when the bag is sent into the vacuum chamber and can continue to rotate.

[0107] The bag feeding cam 7047 and the tracking cam 7037 are respectively set on both sides of a disc, making the structure more compact.

[0108] Figures 35-37 A schematic diagram of the vacuum chamber structure of a double-bag vacuum packaging machine; featuring:

[0109] The box body 801 has an internal cavity that can hold the bag; it also contains two sets of heat-sealing and clamping components arranged side by side; enabling the horizontal heat sealing of two sets of packaging bags at a single workstation. This changes the traditional single-workstation, single-bag packaging method of vacuum packaging machines, realizing a single-workstation, double-bag vacuum chamber structure, significantly accelerating the production speed of a single machine.

[0110] The lid 808 is hinged to the box body 801. The lid 808 can open or close the box body 801, making it convenient to take out or put in the bag.

[0111] The clamping assembly includes: a clamping beam 804, installed inside the box body 801; a first clamping block 805, installed on the clamping beam 804; and a clamping shaft 806, rotatably installed inside the box body 801. A second clamping block 807 is provided at the first end of the clamping shaft 806, and the second clamping block 807 can be adapted to the first clamping block 805 to clamp the bag body. The second end of the clamping shaft 806 extends out of the box body 801. Rotation of the clamping shaft 806 drives the second clamping block 807 to move, cooperating with the first clamping block 805 to clamp or release the bag body.

[0112] The clamping beam 804 has two sets of first clamping blocks 805, second clamping blocks 807, and clamping shafts 806 on both sides, which are distributed to clamp the two ends of the bag body, making the clamping more stable and reliable.

[0113] The heat-sealing assembly includes a heat-sealing head 802, which is slidably installed inside the box body 801. It also includes a heat-sealing drive mechanism to drive the heat-sealing head 802 to slide. After vacuuming, the heat-sealing head 802 can be driven to slide, thereby heat-sealing the bag body.

[0114] It also has a lid 808 driving mechanism for flipping the lid 808. The lid 808 driving mechanism includes a connecting rod 809 and a driving rod 8010. The first end of the connecting rod 809 is hinged to the lid 808, and the second end of the connecting rod 809 is hinged to the first end of the driving rod 8010. The driving rod 8010 is connected to a power end, which drives the driving rod 8010, thereby driving the connecting rod 809 to move, and causing the lid 808 to move hingedly around the box body 801, realizing the opening or closing of the lid 808.

[0115] The heat sealing drive mechanism is a heat sealing cylinder 803, which is installed on the back of the box 801. The piston rod of the heat sealing cylinder 803 is connected to the heat sealing head 802. The heat sealing cylinder 803 drives the heat sealing head 802 to move inside the box 801.

[0116] It also has a connecting block, the first end of which is hinged to the cover 808, and the second end of which is hinged to the first end of the connecting rod 809. The connecting block enables the cover 808 to move within a certain range. When the position of the machine body or the drive mechanism changes, the cover 808 will not be misaligned when closed, and the cover 808 can still close tightly.

[0117] By adopting the above structure, the traditional single-station, single-bag packaging method of vacuum packaging machines is changed, enabling double-bag processing at a single station, which greatly speeds up the production speed of a single machine.

[0118] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0119] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0120] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual serve bag vacuum packaging machine characterized by, Have: Rack, the rack is equipped with: Bag warehouse bag taking mechanism, can be bagged to take bags; The bag warehouse bag taking mechanism can suck two bag bodies at a time; Main machine turntable mechanism, rotationally installed on the rack; Machine clamp mechanism, a series of machine clamp mechanisms are provided on the main machine turntable mechanism, and the machine clamp mechanisms can clamp bag bodies; Upper bag mechanism, capable of transferring bag bodies from the bag warehouse bag taking mechanism to the machine clamp mechanism; Loose clamp mechanism, capable of driving the machine clamp mechanism to loosen the clamp; Bag supporting mechanism, capable of supporting the bag opening of the bag body on the machine clamp mechanism; Bag moving mechanism, capable of sending the bag body filled with material on the machine clamp mechanism into the vacuum chamber; Vacuum chamber, capable of vacuumizing the bag body filled with material; The loose clamp mechanism has: Loose clamp seat, installed on the rack; Push-pull rod, hinged near the middle part of the push-pull rod; Open clamp push plate, hinged on the first end of the push-pull rod; Loose clamp driving mechanism connected with the second end of the push-pull rod and capable of driving the push-pull rod to swing; Righting mechanism, provided on the loose clamp seat, connected with the open clamp push plate and capable of maintaining the posture of the open clamp push plate; The bag moving mechanism has: Tracking swing arm, installed on the stand column of the packaging machine; Bag feeding stand, swingingly installed on the tracking swing arm, and also provided with a bag feeding driving mechanism for driving the bag feeding stand to swing; Clamping mechanism, installed on the bag feeding stand, provided with a first clamping mechanism and a second clamping mechanism on the clamping mechanism, and the first clamping mechanism and the second clamping mechanism can clamp one bag body respectively; The righting mechanism has a first fixed block, a righting rod and a second fixed block, the first fixed block is fixed on the open clamp push plate, the second fixed block is fixed on the loose clamp seat, the two ends of the righting rod are hinged with the first fixed block and the second fixed block respectively, the hinged points of the push-pull rod and the open clamp push plate, the hinged points of the push-pull rod and the loose clamp seat, the hinged points of the righting rod and the first fixed block, and the hinged points of the righting rod and the second fixed block enclose a parallelogram, the loose clamp driving mechanism has a first pull rod, a first swing arm, a second pull rod and a second swing arm, the first end of the first pull rod is hinged with the second end of the push-pull rod, the first end of the first swing arm is hinged with the second end of the first pull rod, the first end of the second pull rod is hinged with the second end of the first swing arm, the first end of the second swing arm is hinged with the second end of the second pull rod, and a loose clamp cam for driving the second swing arm to swing is further provided, the middle part of the second swing arm is hinged on the side of the loose clamp cam, and the second end of the second swing arm is hinged on a bearing seat, and the bearing seat is installed on the rack.

2. The dual-feed bag vacuum packaging machine of claim 1, wherein, The bag warehouse bag taking mechanism has: Bag warehouse bottom plate; Bag warehouse mechanism, installed on the bag warehouse bottom plate; Two groups of bag warehouse mechanisms are provided side by side on the bag warehouse bottom plate, the bag warehouse mechanism includes two bag warehouse vertical plates, the two bag warehouse vertical plates are slidingly installed on the bag warehouse bottom plate, and the two bag warehouse vertical plates can accommodate bag bodies; A bag warehouse adjusting mechanism for adjusting the sliding of the two bag warehouses is further provided; Suction bag mechanism, provided below the bag warehouse mechanism, capable of moving and adsorbing the bag body at the bottom of the bag warehouse mechanism.

3. The dual-feed bag vacuum packaging machine of claim 2, wherein, The machine clamp mechanism has: Two sets of machine clamp structures are connected through a linkage mechanism; The machine clamp structure has: Two sets of matched machine clamp bodies; the first end of the machine clamp body is rotatably installed on the rack; the second end of the machine clamp body is provided with a fixed clamp block; A top rod is movably installed in the machine clamp body; the first end of the top rod is provided with a pressing wheel extending out of the machine clamp body; the second end of the top rod is provided with a movable clamp block extending out of the machine clamp body, and the movable clamp block and the fixed clamp block can cooperate to clamp the bag body.

4. The dual-feed bag vacuum packaging machine of claim 3, wherein, The main machine rotary disc mechanism has: A fixed seat; A central rotating shaft penetrating through the fixed seat and rotatably installed in the fixed seat; A rotary disc fixedly installed on the first end of the central rotating shaft; A machine clamp mechanism, the outer periphery of the rotary disc is provided with a series of machine clamp mechanisms; A linkage mechanism installed on the rotary disc, which can adjust the opening degree of the machine clamp mechanism; A lifting adjustment structure movably installed on the central rotating shaft, which can drive the linkage mechanism.

5. The dual-feed bag vacuum packaging machine of claim 4, wherein, The bag supporting mechanism has: A bag supporting rotary arm; A bag rod assembly installed on the bag supporting rotary arm, which can support two sets of bag bodies; A bag supporting structure installed on the bag supporting rotary arm, which can manipulate the bag rod assembly; A bag supporting return mechanism driving the bag supporting structure to move; A bag supporting lifting driving mechanism capable of driving the bag supporting rotary arm to lift.

6. The dual-feed bag vacuum packaging machine of claim 5, wherein, The vacuum chamber has: A box body provided with a cavity inside, which can place a bag body; Heat sealing assemblies and clamping assemblies, the box body is provided with two sets of heat sealing assemblies and clamping assemblies side by side inside; A box cover hinged to the box body, which can open or close the box body; The clamping assembly has: A clamping cross beam installed in the box body; A first clamp block installed on the clamping cross beam; A clamping shaft rotatably installed in the box body, the first end of the clamping shaft is provided with a second clamp block, the second clamp block can cooperate with the first clamp block to clamp the bag body; the second end of the clamping shaft extends out of the box body.

7. The dual-feed bag vacuum packaging machine of claim 6, wherein, The bag suction mechanism includes a suction nozzle seat and a bag taking shaft, the bag taking shaft is movably installed on the rack, the suction nozzle seat is installed on the upper end of the bag taking shaft, the suction nozzle seat is provided with a suction nozzle capable of adsorbing the bag body; there is also a driving power mechanism driving the bag taking shaft to move.

8. The dual-feed bag vacuum packaging machine of claim 7, wherein, The first end of the movable clamp block is hinged to the fixed clamp block; the middle part of the movable clamp block is hinged to the first end of the joint, the second end of the joint is hinged to the second end of the top rod; the linkage mechanism is a linkage tooth, each of the adjacent machine clamp bodies of the two sets of machine clamp structures is provided with a linkage tooth, and the two linkage teeth are engaged; there is also a machine clamp seat, the machine clamp body is fixedly installed on the machine clamp, and a synchronous tooth is installed on the machine clamp seat; the synchronous teeth of the two machine clamp seats of the machine clamp structure are engaged; a return spring is also sleeved on the top rod; the machine clamp seat is rotatably installed on the rack through a screw shaft; a synchronous shifting block is also provided on one linkage tooth.

9. The dual-feed bag vacuum packaging machine of claim 8, wherein, The linkage mechanism has a press wheel seat, a press wheel swing lever, an adjusting press wheel and a linkage pull rod, the press wheel seat is installed on the rotating disc, the press wheel swing lever is hinged to the press wheel seat near the middle part, the adjusting press wheel is installed on the first end of the press wheel swing lever, the first end of the linkage pull rod is hinged to the second end of the press wheel swing lever; the second end of the linkage pull rod is connected with the machine clamp mechanism; the lifting adjusting structure has a positioning seat, a positioning disc, an adjusting ring and a lifting driving mechanism, the positioning seat is slidingly installed on the fixed seat, the positioning disc is rotatably installed on the upper end of the positioning seat, the adjusting ring is installed on the positioning disc, the upper surface of the adjusting ring is matched with the linkage mechanism, the connecting ring is installed on the lower end of the positioning seat, the lifting driving mechanism can adjust the lifting of the connecting ring, the lifting driving mechanism has an adjusting support which is arranged outside the connecting ring and is hinged to the connecting ring through an adjusting pin shaft; a positioning frame which is installed on the first end of the fixed seat and is hinged to the first side of the adjusting support, a pushing mechanism which is arranged on the second side of the adjusting support and is hinged to the second side of the adjusting support, the pushing mechanism is an electric push rod, the bottom of the electric push rod is installed on the fixed seat, the piston rod of the electric push rod is hinged to the adjusting support, the positioning disc is rotatably installed on the positioning seat through a bearing, the positioning disc is further provided with an adjusting knob, the adjusting knob can be connected with the adjusting power mechanism, the second end of the linkage pull rod is connected with the synchronous knob of the machine clamp mechanism.

10. The dual-feed bag vacuum packaging machine of claim 9, wherein, The bag pole assembly comprises a pair of outer supporting bag poles and inner supporting bag poles, the outer supporting bag poles and the inner supporting bag poles are rotatably installed on a bag supporting rotating arm, the inner supporting bag poles are rotatably installed in the outer supporting bag poles, and the first ends of the inner supporting bag poles extend out of the outer supporting bag poles; the outer supporting bag poles are provided with first bag supporting pieces, and the inner supporting bag poles are provided with second bag supporting pieces; the bag supporting structure has two groups, and the two groups of bag supporting structures are connected with the outer supporting bag poles and the inner supporting bag poles respectively; the bag supporting structure comprises an outer swing rod, the middle part of the outer swing rod of each group of bag supporting structures is fixedly connected with the outer supporting bag pole and the inner supporting bag pole respectively, the first end of the outer swing rod forms a pushing end, and the second end forms a moving end; a bag supporting lifting rod is rotatably installed on the bag supporting rotating arm, the pushing end of the outer swing rod of the two outer supporting bag poles is matched with a first bag supporting lifting rod, the pushing end of the outer swing rod of the two inner supporting bag poles is matched with a second bag supporting lifting rod, a first bag supporting spring is connected with the moving end of the outer swing rod of the two outer supporting bag poles, a second bag supporting spring is connected with the moving end of the outer swing rod of the two inner supporting bag poles, the two bag supporting lifting rods are fixedly connected through a lifting rod connecting shaft, the lifting rod connecting shaft is rotatably installed on the bag supporting rotating arm, a lifting rod driving end is further fixedly arranged on the lifting rod connecting shaft, and the lifting rod driving end can be connected with a bag supporting return power mechanism; the bag supporting return mechanism comprises a bag supporting swing rod rotatably installed on the bag supporting rotating arm, a bag supporting pull rod, a first end of the bag supporting pull rod is hingedly connected with a first end of the bag supporting swing rod, a second end of the bag supporting pull rod is connected with the lifting rod driving end, and a bag supporting return power mechanism can drive the second end of the bag supporting swing rod to move; the bag supporting return power mechanism comprises a bag supporting center fixed shaft fixedly installed on a rack, a bag supporting cam fixedly installed on a first end of the bag supporting center fixed shaft, the bag supporting cam can drive the second end of the bag supporting swing rod to move, a bag supporting center rotating shaft rotatably sleeved on the bag supporting center fixed shaft, the bag supporting rotating arm is fixedly installed on the bag supporting center rotating shaft, and the bag supporting center rotating shaft can drive the bag supporting rotating arm to swing; a rotating power mechanism can drive the bag supporting center rotating shaft to rotate; the rotating power mechanism comprises a bag supporting return rocker arm, a first end of the bag supporting return rocker arm is fixedly connected with the bag supporting center rotating shaft, a return connecting rod, a first end of the return connecting rod is hingedly connected with a second end of the bag supporting return rocker arm, a bag supporting return swing arm, a first end of the bag supporting return swing arm is hingedly connected with the rack, a second end of the bag supporting return swing arm is hingedly connected with a second end of the return connecting rod, and a bag supporting return cam is rotatably installed on the rack, and the middle part of the bag supporting return swing arm is matched with the bag supporting return cam.

11. The dual-feed bag vacuum packaging machine of claim 10, wherein, The clamping mechanism has a bag clamping swing rod seat installed on a tracking swing arm; a fixed clamping plate is fixedly arranged on the bag clamping swing rod seat; the first clamping mechanism has a first bag clamping rod rotatably installed in the bag clamping swing rod seat, a first movable clamping plate capable of being matched with the fixed clamping plate is fixedly arranged on the first bag clamping rod, and a first power mechanism for driving the first bag clamping rod to rotate is arranged on the bag clamping swing rod seat; the second clamping mechanism has a second bag clamping rod rotatably installed in the first bag clamping rod, a first end of the second bag clamping rod extends out of the second bag clamping rod, and a second movable clamping plate capable of being matched with the fixed clamping plate is fixedly arranged on the first end of the second bag clamping rod; a second power mechanism for driving the second bag clamping rod to rotate is further arranged; the first power mechanism comprises a bag clamping rocker arm and a first bag clamping cylinder, the first bag clamping cylinder is hingedly connected to the tracking swing arm, a piston rod of the first bag clamping cylinder is hingedly connected to a first end of the bag clamping rocker arm, and a second end of the bag clamping rocker arm is fixed to the first bag clamping rod; the second power mechanism is a rotary motor, the rotary motor is installed on the bag clamping swing rod seat, and a rotating shaft of the rotary motor is connected to a second end of the second bag clamping rod; the bag feeding driving mechanism comprises a bag feeding secondary pull rod, a first end of the bag feeding secondary pull rod is hingedly connected to a bag feeding stand; a bag feeding rotating shaft is rotatably installed on a rack of the packaging machine; a bag feeding swing rod has a first end hingedly connected to a second end of the bag feeding secondary pull rod and a second end fixedly connected to a first end of the bag feeding rotating shaft; a bag feeding push-pull arm has a first end fixedly connected to a second end of the bag feeding rotating shaft; a bag feeding main pull rod has a first end hingedly connected to a second end of the bag feeding push-pull arm; a bag feeding swing arm is hingedly connected to the rack near a middle portion of the bag feeding swing arm; a bag feeding cam is rotatably installed on the rack, and a second end of the bag feeding swing arm is matched with the bag feeding cam; the tracking swing arm is rotatably installed on a stand column of the packaging machine, and a tracking swing arm driving mechanism for driving the tracking swing arm to swing is further arranged; the tracking swing arm driving mechanism comprises a tracking secondary pull rod, a first end of the tracking secondary pull rod is hingedly connected to the tracking swing arm; a bag feeding rotating shaft is rotatably installed on the rack of the packaging machine; a tracking swing rod has a first end hingedly connected to a second end of the tracking secondary pull rod and a second end fixedly connected to a first end of the bag feeding rotating shaft; a tracking push-pull arm has a first end fixedly connected to a second end of the bag feeding rotating shaft; a tracking main pull rod has a first end hingedly connected to a second end of the tracking push-pull arm; a tracking swing block is hingedly connected to the rack near a middle portion of the tracking swing block; a tracking cam is rotatably installed on the rack, and a second end of the tracking swing block is matched with the tracking cam.

12. The dual-feed bag vacuum packaging machine of claim 11, wherein, Two groups of first clamping blocks, second clamping blocks and clamping shafts are arranged on the two sides of the clamping cross beam, and the two groups of first clamping blocks, second clamping blocks and clamping shafts are distributed on the two sides of the bag body; the heat sealing assembly has a heat sealing head which is slidingly installed in the box body, and is also provided with a heat sealing driving mechanism for driving the heat sealing head to slide; a box cover driving mechanism for driving the box cover to flip is further provided, the box cover driving mechanism comprises a connecting rod and a driving rod, the first end of the connecting rod is hingedly connected with the box cover, and the second end of the connecting rod is hingedly connected with the first end of the driving rod; the heat sealing driving mechanism is a heat sealing cylinder, the heat sealing cylinder is installed on the back of the box body, and the piston rod of the heat sealing cylinder is connected with the heat sealing head.

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