Reciprocating cutter driving mechanism of thermal shrinkage packaging machine

Abstract

The utility model relates to a reciprocating cutter driving mechanism of a thermal shrinkage packaging machine. The reciprocating cutter driving mechanism comprises a support, a cutter mechanism and an eccentric driving assembly. The cutter mechanism comprises a lower cutter rest and an upper cutter rest, and a guide mechanism is additionally arranged to improve cutter stability and cutting accuracy. The eccentric driving assembly achieves stable power transmission through gear transmission, and connecting blocks on the outer sides of the lower disc and the upper disc are rotationally connected with a tool rest connecting shaft to achieve reciprocating motion. The lower knife rest is provided with a protection plate and a silica gel protection piece, the upper knife rest is provided with a cutter and a buffer spring, and adaptability and cutting flatness are enhanced. The mechanism is simple and practical in structure, and packaging quality and production efficiency are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink packaging machine technology, specifically a reciprocating cutter drive mechanism for a heat shrink packaging machine. Background Technology

[0002] Heat shrink packaging machines are widely used in product packaging, and their reciprocating cutter drive mechanism plays a crucial role in cutting materials such as films during the packaging process. A typical reciprocating cutter drive mechanism in an existing heat shrink packaging machine includes a support mounted on a conveyor belt assembly, a cutter mechanism, and an eccentric drive assembly for driving the cutter mechanism. The cutter mechanism generally comprises a lower cutter holder and an upper cutter holder.

[0003] However, in actual use, it was found that when the cutter moves up and down, the cutter mechanism is driven solely by the eccentric drive component (following the circular cutting motion of the disc). This drive method has certain drawbacks. The cutter is prone to wobbling and wobble during its movement, which not only leads to inaccurate cutting positions, affecting the appearance and quality of the packaging, but may also result in inconsistent material dimensions after cutting, increasing the defect rate and severely impacting production efficiency and product quality. Therefore, improving the stability and cutting accuracy of the cutter mechanism has become a crucial issue that needs to be addressed in the reciprocating cutter drive mechanism of current heat shrink packaging machines. Utility Model Content

[0004] In view of the shortcomings in the prior art, this utility model provides a reciprocating cutter drive mechanism for a heat shrink packaging machine.

[0005] The technical solution adopted by this utility model is: a reciprocating cutting drive mechanism for a heat shrink packaging machine, including a bracket mounted on a conveyor belt assembly, a cutting mechanism, and an eccentric drive assembly for driving the cutting mechanism to work. The cutting mechanism includes a lower cutting post and an upper cutting post, and also includes a guide mechanism disposed at both ends of the upper cutting post and the lower cutting post.

[0006] The guiding mechanism includes a lower slide block fixed to both ends of the lower and upper tool holders, a vertical slide rod that slides with the lower slide block, a horizontal slide rod fixed to the bracket, a horizontal slide block that slides with the horizontal slide rod, and an upper slide block fixed to the horizontal slide block. The upper slide block slides with the vertical slide rod.

[0007] Furthermore, the eccentric drive assembly includes a drive power mechanism fixed on the bracket, a drive gear driven and connected to the output end of the drive power mechanism, a lower gear meshing with the drive gear, an upper gear meshing with the lower gear, a lower rotating shaft fixed to the lower gear, an upper rotating shaft fixed to the upper gear, a lower disk fixed on the lower rotating shaft, and an upper disk fixed on the upper rotating shaft. The lower rotating shaft and the upper rotating shaft are rotatably connected to the bracket.

[0008] Furthermore, connecting blocks are provided on the outer sides of both the lower and upper disks, and the connecting shafts at both ends of the lower and upper tool holders are rotatably connected to the connecting blocks on the lower and upper disks, respectively.

[0009] Furthermore, both the lower and upper disks are provided with mounting grooves on their outer sides, and the connecting block is provided with positioning grooves on both sides that are adapted to the sidewalls of the mounting grooves.

[0010] Furthermore, the lower blade holder is provided with a lower blade guard plate, and a silicone protective sheet is fixed on the lower blade guard plate.

[0011] Furthermore, the upper blade holder is provided with an upper cutting blade, and the upper cutting blade is provided with short shafts and long shafts that are connected to the upper blade holder at intervals, and buffer springs are sleeved on the short shafts and long shafts.

[0012] The beneficial effects of this utility model are:

[0013] 1. Improved Cutting Accuracy: When the eccentric drive assembly moves the cutting mechanism up and down, it is prone to wobbling and deflection, resulting in inaccurate cutting. However, the sliding cooperation between the lower slider and the vertical slide bar, the horizontal slider and the horizontal slide bar, and the upper slider and the vertical slide bar in the guide mechanism can precisely guide and limit the movement of the cutting mechanism, effectively preventing wobbling and deflection. This ensures that the cutting blade maintains a stable running trajectory throughout the cutting process, thereby greatly improving cutting accuracy, ensuring uniform product dimensions after cutting, reducing defect rates, and improving product packaging quality.

[0014] 2. Simple and practical structure: The guide mechanism has a simple structure. The components such as the lower slider, vertical slider, horizontal slider, horizontal slider and upper slider are easy to process, manufacture and install. Without adding too much complexity to the structure and cost, it effectively solves the problem of cutter wobbling and deflection, and has high practical value and promotion significance.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a partial schematic diagram of the guiding mechanism.

[0018] Figure 3 This is a partial schematic diagram of the disk.

[0019] Figure 4 This is a schematic diagram showing the connection between the upper disk and the connecting block.

[0020] Figure 1-4In the middle section: 1. Conveyor belt assembly; 2. Support frame; 3. Cutting mechanism; 4. Eccentric drive assembly; 5. Lower cutter holder; 6. Upper cutter holder; 7. Guide mechanism; 8. Lower slider; 9. Vertical slider; 10. Horizontal slider; 11. Horizontal slider; 12. Upper slider; 13. Drive power mechanism; 14. Drive gear; 15. Lower gear; 16. Upper gear; 17. Lower rotating shaft; 18. Upper rotating shaft; 19. Lower disc; 20. Upper disc; 21. Connecting block; 22. Connecting shaft; 23. Inserting slot; 24. Positioning slot; 25. Lower cutter guard plate; 26. Silicone guard sheet; 27. Upper cutter; 28. Short shaft; 29. ​​Long shaft; 30. Buffer spring. Detailed Implementation

[0021] 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.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] This utility model provides a reciprocating cutter drive mechanism for a heat shrink packaging machine.

[0024] In this embodiment, refer to Figure 1-4 The reciprocating cutter drive mechanism of the heat shrink packaging machine includes a bracket 2 mounted on the conveyor belt assembly 1, a cutter mechanism 3, and an eccentric drive assembly 4 for driving the cutter mechanism 3. The cutter mechanism 3 includes a lower cutter holder 5 and an upper cutter holder 6, and also includes a guide mechanism 7 provided at both ends of the upper cutter holder and the lower cutter holder.

[0025] The guiding mechanism includes a lower slide block 8 fixed to both ends of the lower and upper tool holders, a vertical slide rod 9 slidably engaged with the lower slide block 8, a horizontal slide rod 10 fixed to the bracket, a horizontal slide block 11 slidably engaged with the horizontal slide rod, and an upper slide block 12 fixed to the horizontal slide block 11. The upper slide block slidably engages with the vertical slide rod.

[0026] In the above technical solution, a guide mechanism is introduced and installed at both ends of the upper and lower blade holders. This guide mechanism provides multi-dimensional and precise guidance for the movement of the cutting mechanism through the sliding cooperation of the lower slider with the vertical slide rod, the horizontal slider with the horizontal slide rod, and the upper slider with the vertical slide rod. This effectively solves the wobbling and wobble problem that easily occurs when the cutting mechanism is driven up and down solely by an eccentric drive component, significantly improving cutting accuracy, ensuring consistent product dimensions after cutting, and improving packaging quality. At the same time, this guide mechanism enhances the stability of the cutting mechanism's operation and extends the overall service life of the mechanism. Furthermore, the guide mechanism has a relatively simple structure, is easy to manufacture, install, and maintain, and possesses high practicality and economic efficiency.

[0027] Specifically, the eccentric drive assembly includes a drive power mechanism 13 fixed on the bracket, a drive gear 14 driven and connected to the output end of the drive power mechanism 13, a lower gear 15 meshing with the drive gear, an upper gear 16 meshing with the lower gear 15, a lower rotating shaft 17 fixed to the lower gear 16, an upper rotating shaft 18 fixed to the upper gear, a lower disk 19 fixed on the lower rotating shaft 17, and an upper disk 20 fixed on the upper rotating shaft. The lower rotating shaft and the upper rotating shaft are rotatably connected to the bracket.

[0028] In this embodiment, the eccentric drive assembly adopts a combined design of a drive power mechanism, a drive gear, a lower gear, an upper gear, a lower rotating shaft, an upper rotating shaft, a lower disk, and an upper disk. The drive power mechanism provides the power source for the entire drive assembly, achieving stable power transmission through the meshing transmission between the drive gear and the lower gear, and between the lower gear and the upper gear. The fixed connection between the lower rotating shaft and the lower gear, and between the upper rotating shaft and the upper gear, ensures that the lower and upper disks can rotate synchronously with the shafts. Furthermore, the lower and upper rotating shafts are rotatably connected to the support, making the entire eccentric drive assembly operate smoothly and providing reliable and stable power drive for the up-and-down reciprocating motion of the cutting mechanism, ensuring that the cutting mechanism moves accurately along a predetermined trajectory.

[0029] The power drive can be a combination of a conventional motor and a reducer, or a servo motor or other type of motor for rotational drive.

[0030] Specifically, connecting blocks 21 are provided on the outer sides of both the lower and upper disks, and the connecting shafts 22 at both ends of the lower and upper tool holders are rotatably connected to the connecting blocks 21 on the lower and upper disks, respectively.

[0031] In this embodiment, connecting blocks are provided on the outer sides of the lower and upper disks (i.e., the connecting blocks are eccentrically set relative to the disks), and the connecting shafts at both ends of the lower and upper tool holders are rotatably connected to the connecting blocks. This connection method cleverly transforms the rotational motion of the eccentric drive component into the up-and-down reciprocating motion of the cutting mechanism, or more accurately, it should follow the disk to make a circular motion, thereby realizing the up-and-down cutting action.

[0032] Specifically, both the lower and upper discs are provided with mounting grooves 23 on their outer sides, and the connecting block is provided with positioning grooves 24 on both sides that are adapted to the sidewalls of the mounting grooves 23.

[0033] In this embodiment, the lower and upper disks are provided with mounting grooves on their outer sides, and the connecting block is provided with positioning grooves on both sides that fit the sidewalls of the mounting grooves. This structural design enhances the connection stability between the connecting block and the disk. The cooperation between the positioning grooves and the mounting grooves effectively prevents the connecting block from undergoing axial or radial displacement on the disk, ensuring that the connecting block and the disk maintain a tight and stable connection during the reciprocating motion of the cutting mechanism. This avoids deviations in the cutting mechanism's movement caused by loose connections, further ensuring the accuracy and stability of the cutting.

[0034] Specifically, the lower blade holder is provided with a lower blade guard plate 25, and a silicone guard plate 26 is fixed on the lower blade guard plate 25.

[0035] In this embodiment, a lower tool guard plate is provided on the lower tool holder, and a silicone protective sheet is fixed on the guard plate. The lower tool guard plate can provide a certain degree of protection for the lower tool, reduce damage to the lower tool from external factors, and extend the service life of the lower tool.

[0036] Specifically, the upper blade holder is provided with an upper cutting blade 27, and the upper cutting blade 27 is provided with a short shaft 28 and a long shaft 29 that are connected to the upper blade holder at intervals. A buffer spring 30 is sleeved on the short shaft and the long shaft.

[0037] In this embodiment, the upper tool holder is equipped with an upper cutter, and the upper cutter is connected to the upper tool holder via a short shaft and a long shaft that are spaced apart. Buffer springs are fitted onto the short shaft and the long shaft, such as... Figure 2 As shown, the buffer springs on the short and long shafts are spaced apart to provide cushioning for the upper cutter. The buffer springs enable the upper cutter to have a buffering function during cutting; when the cutter contacts the material being cut, the springs absorb some of the impact force, preventing uneven cutting force due to excessive instantaneous impact and thus improving the smoothness of the cut. Simultaneously, the buffer springs can automatically adjust the cutter pressure according to the different thicknesses and hardnesses of the material, enhancing the cutter's adaptability to different materials and improving the equipment's versatility.

[0038] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A reciprocating knife drive mechanism for a heat shrink packaging machine, comprising a support frame mounted on a conveyor assembly, a knife mechanism, and an eccentric drive assembly for driving the knife mechanism, the knife mechanism comprising a lower knife frame and an upper knife frame, characterised in that: It also includes guide mechanisms located at both ends of the upper and lower tool posts; The guiding mechanism includes a lower slide block fixed to both ends of the lower and upper tool holders, a vertical slide rod that slides with the lower slide block, a horizontal slide rod fixed to the bracket, a horizontal slide block that slides with the horizontal slide rod, and an upper slide block fixed to the horizontal slide block. The upper slide block slides with the vertical slide rod.

2. The reciprocating cutter drive mechanism of a heat shrink packaging machine of claim 1, wherein: The eccentric drive assembly includes a drive power mechanism fixed on the bracket, a drive gear driven and connected to the output end of the drive power mechanism, a lower gear meshing with the drive gear, an upper gear meshing with the lower gear, a lower rotating shaft fixed to the lower gear, an upper rotating shaft fixed to the upper gear, a lower disk fixed on the lower rotating shaft, and an upper disk fixed on the upper rotating shaft. The lower rotating shaft and the upper rotating shaft are rotatably connected to the bracket.

3. The reciprocating cutter drive mechanism of a heat shrink packaging machine of claim 2, wherein: Connecting blocks are provided on the outer sides of both the lower and upper disks, and the connecting shafts at both ends of the lower and upper tool holders are rotatably connected to the connecting blocks on the lower and upper disks, respectively.

4. The reciprocating cutter drive mechanism of a heat shrink packaging machine of claim 3, wherein: Both the lower and upper disks are provided with mounting grooves on their outer sides, and the connecting block is provided with positioning grooves on both sides that are adapted to the sidewalls of the mounting grooves.

5. The reciprocating cutter drive mechanism of a heat shrink packaging machine of claim 1, wherein: The lower blade holder is equipped with a lower blade guard plate, and a silicone protective sheet is fixed on the lower blade guard plate.

6. The reciprocating cutter drive mechanism of a heat shrink packaging machine of claim 1, wherein: The upper blade holder is equipped with an upper cutting blade, and the upper cutting blade is provided with short shafts and long shafts that are connected to the upper blade holder at intervals. Buffer springs are sleeved on the short shafts and long shafts.

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