Double-crank chasing and sealing device for vertical packaging machine

Abstract

The utility model provides a kind of vertical packing machine double-crank pursuit shearing sealing device, it is related to vertical packing machine technical field, including double-crank transverse sealing hot sealing mechanism, double-crank transverse sealing hot sealing mechanism includes hot sealing power component, double-crank connecting rod component and hot sealing component, hot sealing power component includes the two output ends of symmetrical arrangement and synchronous rotation, two output ends are connected with double-crank connecting rod component, two double-crank connecting rod components are connected with the transmission of hot sealing component, and hot sealing component includes two hot sealing knives of relative arrangement;Hot sealing power component can be driven by two double-crank connecting rod components two hot sealing knives towards or opposite movement;The utility model not only can effectively guarantee the stability of hot sealing knife moving process, avoid sealing wrinkle, misplacement and other problems, guarantee product sealing quality, but also can realize high-speed packaging, substantially improve packaging production efficiency, compared with traditional cam transmission structure, device stability is better, and service life is more long.

Description

Technical Field

[0001] This utility model relates to the field of vertical packaging machine technology, specifically to a double-crank follow-up cutting and sealing device for a vertical packaging machine. Background Technology

[0002] In the packaging production of industries such as food, daily chemicals, and pharmaceuticals, vertical packaging machines are widely used for continuous packaging of materials such as granules, powders, and liquids due to their small footprint and high production efficiency. Among them, the horizontal sealing device is the core functional component of the vertical packaging machine, and its sealing accuracy, stability, and heat sealing efficiency directly determine the sealing performance, appearance quality, and production continuity of the packaged products.

[0003] Currently, most mainstream vertical packaging machines on the market use single-crank connecting rod structures or cam drive structures for horizontal sealing. However, these traditional structures have significant drawbacks in practical applications: On the one hand, the single-crank connecting rod structure is limited by the characteristics of the motion trajectory. At the moment of contact between the heat sealing knife and the packaging film, fluctuations in motion speed can easily cause relative slippage between the heat sealing knife and the packaging film, leading to problems such as sealing wrinkles and incomplete sealing. This problem is particularly prominent in high-speed packaging scenarios, seriously affecting the product qualification rate. On the other hand, although the cam drive structure can optimize the motion trajectory to a certain extent, the machining accuracy of the cam profile is extremely high, and long-term use can easily lead to cam wear and increased clearance, increasing equipment maintenance costs and downtime, making it difficult to meet the needs of high-precision, long-term continuous production.

[0004] Furthermore, traditional horizontal sealing devices are mostly driven from one side, and the synchronization of the heat-sealing blades on both sides depends on the control of the mechanical transmission clearance. During long-term operation, single-side drive can easily lead to asynchronous movement of the heat-sealing blades on both sides, resulting in problems such as heat sealing misalignment and inconsistent sealing width, further reducing the consistency and aesthetics of the packaged products. As the market's requirements for the precision, efficiency, and stability of packaging products continue to increase, traditional horizontal sealing devices can no longer meet the needs of modern high-speed packaging production lines, and there is an urgent need for a horizontal sealing technology solution that can achieve high precision, high stability, and low maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to provide a vertical packaging machine double-crank follow-cut sealing device to solve the above-mentioned technical problems in the prior art; the preferred technical solution among the many technical solutions provided by this utility model can produce many technical effects, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This utility model provides a vertical packaging machine with a double-crank follow-cut sealing device, including a double-crank horizontal sealing heat sealing mechanism. The double-crank horizontal sealing heat sealing mechanism includes a heat sealing power component, a double-crank connecting rod assembly, and a heat sealing component. The heat sealing power component includes two symmetrically arranged and synchronously rotating output ends. Both output ends are connected to a double-crank connecting rod assembly, and both double-crank connecting rod assemblies are drively connected to the heat sealing component. The heat sealing component includes two heat sealing blades arranged opposite each other. The heat sealing power component can drive the two heat sealing blades to move towards or away from each other through the two double-crank connecting rod assemblies.

[0008] Preferably, the heat-sealing power assembly includes a vertical dual-output shaft steering motor, which has two coaxially arranged and synchronously rotating output shafts, and the two output shafts are respectively connected to the two double-crank connecting rod assemblies.

[0009] Preferably, the double crank connecting rod assembly includes a oscillating member, a first crank connecting rod, and a second crank connecting rod, wherein: the middle position of the oscillating member is fixedly disposed on the corresponding output shaft, and the oscillating member rotates synchronously with the corresponding output shaft; the first end of the first crank connecting rod and the first end of the second crank connecting rod are rotatably connected to the two ends of the oscillating member, and the second end of the first crank connecting rod and the second end of the second crank connecting rod are respectively connected to the two heat sealing knives.

[0010] Preferably, the double-crank horizontal sealing heat sealing mechanism further includes two symmetrically arranged horizontal guide components. Each horizontal guide component includes a horizontal guide seat and a sliding shaft. The two heat sealing knives are respectively configured as a first heat sealing knife and a second heat sealing knife. Specifically, the two horizontal guide seats are symmetrically arranged on both sides of the vertical double-output shaft steering motor, and the end of the output shaft is rotatably mounted on the outer wall of the corresponding horizontal guide seat. The first end of the sliding shaft is connected to the linkage beam, and the second end of the sliding shaft slides through the horizontal guide seat and is connected to the first heat sealing beam. The second end of the first crank connecting rod is rotatably connected to the linkage beam. The first heat sealing knife is mounted on the first heat sealing beam, and the second end of the second crank connecting rod is rotatably connected to the second heat sealing beam. The second heat sealing beam is slidably mounted between the two horizontal guide seats, and the second heat sealing knife is mounted on the second heat sealing beam.

[0011] Preferably, the vertical packaging machine's double-crank follow-up cutting and sealing device includes a telescopic cutting mechanism, which is mounted on the first heat-sealing beam and moves synchronously with it. The telescopic cutting mechanism includes a cutting telescopic component and a serrated cutter. The cutting telescopic component is fixedly mounted on the first heat-sealing beam, and the telescopic end of the cutting telescopic component is connected to the serrated cutter. A guide groove is provided horizontally on the first heat-sealing cutter, and the serrated cutter passes through the guide groove and slides in cooperation with it.

[0012] Preferably, the vertical packaging machine's double-crank follow-up cutting and sealing device includes a corner bag insertion mechanism, which includes two corner bag insertion assemblies arranged opposite to each other on both sides of the heat sealing assembly; each corner bag insertion assembly includes a corner bag telescopic assembly and a corner plate assembly, the corner bag telescopic assembly being connected to the corner plate assembly and capable of driving the corner plate assembly to reciprocate.

[0013] Preferably, the vertical packaging machine's double-crank follow-up cutting and sealing device includes an anti-pinch mechanism, which includes two anti-pinch components arranged opposite to each other, each of which corresponds to one of the two heat-sealing blades. Each anti-pinch component includes a movably arranged top block and an elastic element connected to the top block. The top block is used to pre-press the bag opening when the two heat-sealing blades heat-seal, and the elastic element deforms when the top block pre-presses the bag opening.

[0014] Preferably, the vertical packaging machine's double-crank follow-up cutting and sealing device includes a crank-swing arm lifting mechanism, which includes a lifting power component, a crank-swing arm assembly, and a lifting frame. The lifting power component has a drive shaft at its drive end. Two crank-swing arm assemblies are symmetrically arranged. Each crank-swing arm assembly includes a swing connecting block and a reciprocating crank. The swing connecting block is fixedly mounted on the drive shaft and rotates synchronously with it. The first end of the reciprocating crank is rotatably connected to the swing connecting block, and the second end of the reciprocating crank is rotatably connected to the lifting frame. The double-crank horizontal sealing heat-sealing mechanism is mounted on the lifting frame and rises and falls synchronously with it.

[0015] Preferably, the crank arm lifting mechanism includes a vertical guide assembly, which includes a vertical guide shaft and a sliding seat, wherein: the vertical guide shaft passes through the sliding seat and slides with the sliding seat; the lifting frame is connected to the sliding seat and lifts and lowers synchronously.

[0016] Preferably, the crank arm lifting mechanism further includes a buffer cylinder, which is disposed above the sliding seat, and the telescopic end of the buffer cylinder is connected to the sliding seat; the inner cavity of the buffer cylinder is connected to an air outlet pipe, and the air outlet of the air outlet pipe faces the vertical guide assembly.

[0017] The double-crank follow-up cutting and sealing device for a vertical packaging machine provided by this utility model has at least the following beneficial effects:

[0018] I. Improve sealing precision and product consistency

[0019] This invention employs a symmetrical and synchronously rotating dual-output heat-sealing power assembly, coupled with a double-crank connecting rod assembly to drive the heat-sealing assembly, ensuring that the heat-sealing blades on both sides maintain strict motion synchronization. Compared to traditional single-sided drive or single-crank structures, the double-crank connecting rod assembly precisely controls the movement trajectory of the heat-sealing blades, preventing relative slippage when the heat-sealing blades contact the packaging film. This effectively solves problems such as sealing wrinkles, misalignment, and incomplete sealing, significantly improving the flatness and sealing performance of packaged products and ensuring consistent sealing quality for each batch.

[0020] II. Adapting to high-speed packaging scenarios and improving production efficiency

[0021] The motion characteristics of the double-crank connecting rod assembly have been optimized, enabling uniform contact and stable pressure application during the opening and closing of the heat-sealing knife. This reduces sealing delays or failures caused by speed fluctuations in traditional structures. Simultaneously, the symmetrical and synchronous power output reduces mechanical transmission losses, allowing the device to stably adapt to higher packaging speeds and meet the demands of modern high-speed production lines. While ensuring sealing quality, this significantly improves packaging production efficiency, creating conditions for enterprises to increase capacity.

[0022] III. Enhance device stability and reduce maintenance costs

[0023] On the one hand, the double crank connecting rod assembly has higher structural strength than the traditional cam structure, and the force is evenly distributed during the movement, reducing local wear and extending the service life of the core components. On the other hand, the symmetrical and synchronous transmission design simplifies the debugging and maintenance process of the mechanical structure, avoids the problem of frequent component replacement due to contour wear in the traditional cam structure, reduces the maintenance frequency and cost of the equipment, reduces production line downtime, and improves the overall operational stability and economy of the equipment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the double-crank horizontal sealing heat sealing mechanism, telescopic cutting mechanism and corner bag insertion mechanism of this utility model from one perspective;

[0027] Figure 3 This is a structural schematic diagram from another perspective of the double-crank horizontal sealing heat sealing mechanism, telescopic cutting mechanism, and corner bag insertion mechanism of this utility model;

[0028] Figure 4 This is a schematic diagram of the installation position of the telescopic cutting mechanism of this utility model;

[0029] Figure 5 This is a schematic diagram of the telescopic cutting mechanism of this utility model;

[0030] Figure 6 This is a schematic diagram of the crank-swing arm lifting mechanism and the discharge trough mechanism of this utility model from one perspective.

[0031] Figure 7 This is a structural schematic diagram of the crank-swing arm lifting mechanism and the discharge chute mechanism of this utility model from another perspective.

[0032] Figure Labels

[0033] 1. Double-crank horizontal heat sealing mechanism; 11. Heat sealing power assembly; 111. Vertical double-output shaft steering motor; 112. Output shaft; 12. Double-crank connecting rod assembly; 121. Oscillating component; 122. First crank connecting rod; 123. Second crank connecting rod; 13. Heat sealing assembly; 131. First heat sealing blade; 132. Second heat sealing blade; 14. Horizontal guide assembly; 141. Horizontal guide seat; 142. Sliding shaft; 143. Linkage beam; 144. First heat sealing beam; 145. Second heat sealing beam; 2. Telescopic cutting mechanism; 21. Cutting telescopic mechanism Components; 22. Serrated cutter; 3. Corner bag insertion mechanism; 31. Corner bag telescopic assembly; 32. Corner plate assembly; 4. Anti-pinch mechanism; 41. Top block; 42. Elastic element; 43. Mounting shaft; 5. Crank swing arm lifting mechanism; 51. Lifting power assembly; 511. Lifting motor; 512. Drive shaft; 52. Crank swing arm assembly; 521. Swing connecting block; 522. Reciprocating crank; 53. Lifting frame; 54. Vertical guide assembly; 541. Vertical guide shaft; 542. Sliding seat; 55. Buffer cylinder; 6. Discharge chute mechanism. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] This utility model provides a double-crank follow-up cutting and sealing device for a vertical packaging machine, reference. Figures 1 to 7 As shown, the vertical packaging machine's double-crank follow-cut sealing device includes a double-crank horizontal sealing heat sealing mechanism 1, which includes a heat sealing power assembly 11, a double-crank connecting rod assembly 12, and a heat sealing assembly 13.

[0036] The heat sealing power assembly 11 includes two output ends that are symmetrically arranged and rotate synchronously. Both output ends are connected to a double crank connecting rod assembly 12. Both double crank connecting rod assemblies 12 are connected to the heat sealing assembly 13 for transmission. The heat sealing assembly 13 includes two heat sealing blades arranged opposite to each other.

[0037] During operation, the two output ends of the heat sealing power assembly 11 rotate synchronously, and the two double crank connecting rod assemblies 12 respectively convert the rotation of the two output ends into the opposite or opposite motion of the two heat sealing knives, thereby completing the heat sealing of the bag film.

[0038] In the above process, the two symmetrically arranged double crank connecting rod assemblies 12 convert and transmit power, which can not only effectively ensure the stability of the heat sealing knife movement process and avoid problems such as sealing wrinkles and misalignment, thus ensuring the sealing quality of the product, but also achieve high-speed packaging and greatly improve packaging production efficiency. At the same time, compared with the traditional cam transmission structure, the device has better stability and a longer service life.

[0039] As an optional implementation, the heat-sealing power assembly 11 includes a vertical dual-output shaft steering motor 111, which is provided with two coaxially arranged and synchronously rotating output shafts 112, and the two output shafts 112 are respectively connected to two double crank connecting rod assemblies 12.

[0040] The vertical dual-output shaft steering motor 111 is adopted, which can provide two synchronous and stable output ends to ensure sealing quality. On the other hand, the vertical structure can optimize the spatial layout of the equipment.

[0041] As an optional implementation, the double crank connecting rod assembly 12 includes a oscillating member 121, a first crank connecting rod 122, and a second crank connecting rod 123.

[0042] The swing member 121 is configured as a swing rod, with its middle part fixedly mounted on the corresponding output shaft 112. The swing member 121 rotates synchronously with the corresponding output shaft 112. The first end of the first crank connecting rod 122 and the first end of the second crank connecting rod 123 are respectively hinged to the two ends of the swing member 121. The second end of the first crank connecting rod 122 and the second end of the second crank connecting rod 123 are respectively connected to the two heat sealing knives.

[0043] During operation, the swing element 121 rotates with the output shaft 112, and the two crank connecting rods drive the two heat sealing knives to move. This not only effectively drives the heat sealing knives to perform heat sealing actions and ensures the sealing quality, but also evenly distributes the power, avoids overload on local components, and ensures the service life of the components.

[0044] As an optional implementation, the double-crank horizontal sealing heat sealing mechanism 1 further includes two symmetrically arranged horizontal guide components 14. The horizontal guide components 14 include a horizontal guide seat 141 and a sliding shaft 142. The two heat sealing knives are respectively configured as a first heat sealing knife 131 and a second heat sealing knife 132.

[0045] Two horizontal guide seats 141 are symmetrically arranged on both sides of the vertical double-output shaft steering motor 111. The end of the output shaft 112 is rotatably mounted on the side wall of the corresponding horizontal guide seat 141 through a bearing. The first end of the sliding shaft 142 is connected to the linkage beam 143, and the second end of the sliding shaft 142 slides through the corresponding horizontal guide seat 141 and is connected to the first heat-sealing beam 144. The second end of the first crank connecting rod 122 is hinged to the linkage beam 143. The first heat-sealing knife 131 is mounted on the first heat-sealing beam 144. The second end of the second crank connecting rod 123 is hinged to the second heat-sealing beam 145. The second heat-sealing beam 145 is slidably arranged between the two horizontal guide seats 141, and the second heat-sealing knife 132 is mounted on the second heat-sealing beam 145.

[0046] The horizontal guide component 14 can effectively constrain the movement direction of the two heat sealing blades, ensuring the horizontal opening and closing effect of the two heat sealing blades, and at the same time improving the stability of the action process.

[0047] As an optional implementation, the vertical packaging machine double crank follow-cut sealing device includes a telescopic cutting mechanism 2, which is mounted on the first heat sealing beam 144 and moves synchronously with the first heat sealing beam 144.

[0048] The telescopic cutting mechanism 2 includes a telescopic cutting assembly 21 and a serrated cutter 22. The telescopic cutting assembly 21 is a pneumatic telescopic assembly and is fixedly mounted on the first heat-sealing beam 144. The telescopic end of the telescopic cutting assembly 21 is connected to the serrated cutter 22. A guide groove is provided horizontally on the first heat-sealing blade 131. The guide groove passes through the first heat-sealing beam 144, and the serrated cutter 22 passes through the guide groove and slides in cooperation with the guide groove.

[0049] After the horizontal sealing action is completed, the telescopic component 21 extends and retracts, driving the serrated cutter 22 to move, thereby completing the cutting of the bag opening.

[0050] During the cutting process, the guide groove can effectively limit the movement trajectory of the serrated cutter, and together with the serrated cutter 22, ensure the cutting effect.

[0051] As an optional implementation, the vertical packaging machine's double-crank follow-up cutting and sealing device includes a corner bag insertion mechanism 3, which includes two corner bag insertion components arranged opposite to each other on both sides of the heat sealing assembly 13.

[0052] The corner pocket assembly includes a corner pocket telescopic assembly 31 and a corner plate assembly 32. The corner pocket telescopic assembly 31 is a pneumatic telescopic assembly. The telescopic end of the corner pocket telescopic assembly 31 is connected to the corner plate assembly 32 and can drive the corner plate assembly 32 to move back and forth.

[0053] Specifically, the corner plate assembly 32 includes an upper corner plate and a lower corner plate, which extend and retract synchronously and are arranged vertically.

[0054] As an optional implementation, the vertical packaging machine double crank follow-up cutting and sealing device includes an anti-pinch mechanism 4, which includes two anti-pinch components arranged opposite to each other, and the two anti-pinch components are respectively opposite to the two heat sealing knives.

[0055] The anti-pinch component includes a movable top block 41 and an elastic element 42 connected to the top block 41. The top block 41 is connected to a mounting shaft 43. A mounting seat is provided on the heat sealing beam. The mounting shaft 43 is slidably mounted on the corresponding mounting seat. The elastic element 42 is a spring, sleeved on the mounting shaft 43, and its two ends abut against the mounting seat and the heat sealing beam, respectively.

[0056] During heat sealing, the first heat sealing beam 144 and the second heat sealing beam 145 move toward each other, and the two top blocks 41 move toward each other to pre-tighten the seal. As the movement proceeds toward each other, the top blocks 41 press against the elastic element 42, causing it to deform, and the first heat sealing blade 131 and the second heat sealing blade 132 close to complete the heat sealing.

[0057] The anti-clamping mechanism 4 is set up to pre-compress the material before heat sealing, which can effectively prevent the material from falling to the sealing position prematurely due to different falling speeds during feeding, thus solving the risk of material clamping by the heat sealing knife during high-speed sealing.

[0058] As an optional implementation, the vertical packaging machine double crank follow-up cutting and sealing device includes a crank swing arm lifting mechanism 5, which includes a lifting power component 51, a crank swing arm component 52, and a lifting frame 53.

[0059] The lifting power assembly 51 includes a lifting motor 511, and the driving end of the lifting motor 511 is provided with a drive shaft 512; the number of crank arm assemblies 52 is set to two, and the two crank arm assemblies 52 are symmetrically arranged. The crank arm assembly 52 includes a swing connecting block 521 and a reciprocating crank 522. The swing connecting block 521 is fixedly mounted on the drive shaft 512 and rotates synchronously with the drive shaft 512. The first end of the reciprocating crank 522 is hinged to the swing connecting block 521, and the second end of the reciprocating crank 522 is hinged to the lifting frame 53.

[0060] The double-crank horizontal sealing heat sealing mechanism 1 is mounted on the lifting frame 53 and rises and falls synchronously with the lifting frame 53.

[0061] During operation, the lifting power assembly 51 drives the lifting frame 53 to rise and fall through the two crank swing arm assemblies 52. The double crank horizontal sealing heat sealing mechanism 1, the telescopic cutting mechanism 2, the corner bag insertion mechanism 3, and the anti-pinch mechanism 4 rise and fall synchronously. During this process, the double crank horizontal sealing heat sealing mechanism 1 performs the heat sealing action to heat seal the bag opening, the telescopic cutting mechanism 2 completes the cutting of the bag opening, and the corner bag insertion mechanism 3 completes the insertion of the corner bag into the bag body.

[0062] The double-crank horizontal sealing heat sealing mechanism 1, the telescopic cutting mechanism 2, the corner bag insertion mechanism 3, the anti-pinch mechanism 4, and the crank swing arm lifting mechanism 5 work together to achieve follow-up cutting and sealing, which can effectively improve work efficiency and packaging effect.

[0063] As an optional implementation, the crank arm lifting mechanism 5 includes two vertical guide components 54, which are symmetrically arranged on both sides of the two crank arm assemblies 52.

[0064] The vertical guide assembly 54 includes a vertical guide shaft 541 and a sliding seat 542. The vertical guide shaft 541 passes through the sliding seat 542 and slides in cooperation with the sliding seat 542. The lifting frame 53 is connected to the sliding seat 542 and lifts and lowers synchronously.

[0065] The vertical guide component 54 can effectively constrain the lifting trajectory and improve the tracking accuracy.

[0066] As an optional implementation, the crank arm lifting mechanism 5 also includes a buffer cylinder 55. The number of buffer cylinders 55 is set to two. The buffer cylinders 55 are arranged above the sliding seat 542, and the telescopic end of the buffer cylinder 55 is connected to the sliding seat 542. The rod chamber of the buffer cylinder 55 is connected to an air outlet pipe, and the air outlet of the air outlet pipe faces the vertical guide assembly 54.

[0067] The buffer cylinder 55 serves two purposes: firstly, it acts as a buffer, effectively reducing the impact and load on the mechanism during high-speed ascent; secondly, during descent, the gas in the rod chamber of the buffer cylinder 55 is compressed and blown towards the vertical guide assembly 54 through the exhaust pipe, thus achieving the functions of cooling and dust removal.

[0068] As an optional implementation, the vertical packaging machine double-crank follow-up cutting and sealing device further includes a discharge chute mechanism 6, which includes a discharge chute, and the discharge chute is located directly below the double-crank horizontal sealing heat sealing mechanism 1.

[0069] During the operation, the finished bag after being horizontally sealed slides out through the discharge chute.

[0070] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A double-crank follow-up cutting and sealing device for a vertical packaging machine, characterized in that, The system includes a double-crank transverse sealing heat sealing mechanism, which comprises a heat sealing power assembly, a double-crank connecting rod assembly, and a heat sealing assembly, wherein: The heat sealing power assembly includes two output ends that are symmetrically arranged and rotate synchronously. Both output ends are connected to a double crank connecting rod assembly. Both double crank connecting rod assemblies are connected to the heat sealing assembly in a transmission manner. The heat sealing assembly includes two heat sealing blades arranged opposite to each other. The heat-sealing power assembly can drive the two heat-sealing blades to move towards or away from each other through the two double-crank connecting rod assemblies.

2. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 1, characterized in that, The heat-sealing power assembly includes a vertical dual-output shaft steering motor, which has two coaxially arranged and synchronously rotating output shafts, and the two output shafts are respectively connected to the two double crank connecting rod assemblies.

3. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 2, characterized in that, The double-crank connecting rod assembly includes a oscillating element, a first crank connecting rod, and a second crank connecting rod, wherein: The middle position of the swing member is fixedly set on the corresponding output shaft, and the swing member rotates synchronously with the corresponding output shaft; The first end of the first crank connecting rod and the first end of the second crank connecting rod are rotatably connected to the two ends of the swing member, and the second end of the first crank connecting rod and the second end of the second crank connecting rod are respectively connected to the two heat sealing knives.

4. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 3, characterized in that, The double-crank horizontal sealing heat sealing mechanism further includes two symmetrically arranged horizontal guide components. Each horizontal guide component includes a horizontal guide seat and a sliding shaft. The two heat sealing blades are respectively configured as a first heat sealing blade and a second heat sealing blade, wherein: The two horizontal guide seats are symmetrically arranged on both sides of the vertical double-output shaft steering motor, and the end of the output shaft is rotatably arranged on the outer wall of the corresponding horizontal guide seat. The first end of the sliding shaft is connected to the linkage beam, and the second end of the sliding shaft slides through the horizontal guide seat and is connected to the first heat-sealing beam. The second end of the first crank connecting rod is rotatably connected to the linkage beam. The first heat-sealing knife is disposed on the first heat-sealing beam. The second end of the second crank connecting rod is rotatably connected to the second heat-sealing beam. The second heat-sealing beam is slidably disposed between the two horizontal guide seats, and the second heat-sealing knife is disposed on the second heat-sealing beam.

5. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 4, characterized in that, The vertical packaging machine's double-crank follow-up cutting and sealing device includes a telescopic cutting mechanism, which is mounted on the first heat-sealing beam and moves synchronously with the first heat-sealing beam. The telescopic cutting mechanism includes a telescopic cutting component and a serrated cutter. The telescopic cutting component is fixedly mounted on the first heat-sealing beam. The telescopic end of the telescopic cutting component is connected to the serrated cutter. A guide groove is provided through the first heat-sealing cutter in the horizontal direction. The serrated cutter passes through the guide groove and slides with the guide groove.

6. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 1, characterized in that, The vertical packaging machine's double-crank follow-up cutting and sealing device includes a corner bag insertion mechanism, which includes two corner bag insertion components arranged opposite to each other on both sides of the heat sealing component; The corner pocket assembly includes a corner pocket telescopic assembly and a corner plate assembly. The corner pocket telescopic assembly is connected to the corner plate assembly and can drive the corner plate assembly to move back and forth.

7. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 1, characterized in that, The vertical packaging machine's double-crank follow-up cutting and sealing device includes an anti-pinch mechanism, which includes two anti-pinch components arranged opposite to each other, and the two anti-pinch components respectively correspond to the two heat sealing blades; The anti-pinch assembly includes a movable top block and an elastic element connected to the top block. The top block is used to pre-press the bag opening when the two heat-sealing knives heat-seal. When the top block pre-presses the bag opening, the elastic element deforms.

8. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 1, characterized in that, The vertical packaging machine's double-crank follow-up cutting and sealing device includes a crank-swing arm lifting mechanism, which comprises a lifting power component, a crank-swing arm assembly, and a lifting frame, wherein: The driving end of the lifting power component is provided with a drive shaft; The number of crank-swing arm assemblies is set to two, and the two crank-swing arm assemblies are symmetrically arranged. Each crank-swing arm assembly includes a swing connecting block and a reciprocating crank. The swing connecting block is fixedly mounted on the drive shaft and rotates synchronously with the drive shaft. The first end of the reciprocating crank is rotatably connected to the swing connecting block, and the second end of the reciprocating crank is rotatably connected to the lifting frame. The double-crank horizontal sealing heat sealing mechanism is mounted on the lifting frame and moves up and down synchronously with the lifting frame.

9. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 8, characterized in that, The crank-arm lifting mechanism includes a vertical guide assembly, which comprises a vertical guide shaft and a sliding seat, wherein: The vertical guide shaft passes through the sliding seat and slides with the sliding seat; The lifting frame is connected to the sliding seat and moves up and down synchronously.

10. The vertical packaging machine double-crank follow-up cutting and sealing device according to claim 9, characterized in that, The crank arm lifting mechanism also includes a buffer cylinder, which is disposed above the sliding seat, and the telescopic end of the buffer cylinder is connected to the sliding seat. The inner cavity of the buffer cylinder is connected to an air outlet pipe, and the air outlet of the air outlet pipe faces the vertical guide assembly.

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